JP6670056B2 - Handrail for bathtub - Google Patents

Description

  The present invention relates to a handrail for a bathtub which is detachably attached by clamping a side wall of a bathtub from a washing area side and a bathtub side, and before and after the attachment, the position and handle of the handrail attached to the main body frame with respect to the bathtub side wall. The present invention relates to a bathtub handrail in which the position of a knob does not change and the side wall of the bathtub is prevented from being damaged due to an excessive clamping force.

  2. Description of the Related Art Conventionally, a bathtub handrail has been provided that can be detachably attached by clamping a side wall of a bathtub from a washing side and a bathtub side so that an elderly person or the like can easily support a body when entering or leaving a bathtub. Have been. Since the bathtub handrail is used by a handicapped user to keep his or her own weight, it must be accurately and firmly attached to a desired position on the side wall of the bathtub.

  For this reason, for example, in the case of a handrail for a bathtub described in Japanese Patent Application Laid-Open No. 2010-246691 (Patent Document 1) or International Patent Publication WO2013-157078 (Patent Document 2), a main body frame mounted on a bathtub side wall. By screwing and retracting the bolt shaft attached to the tub, and pressing the pressing plate supported by the tip of the bolt shaft against the bathtub, the bathtub handrail can be firmly attached to the bathtub side wall.

  However, since the handrails for bathtubs described in Patent Documents 1 and 2 fix the pressing plate to the side wall of the bathtub by separating the pressing plate from the main body frame, after placing the main body frame on the side wall of the bathtub, When the pressing plate is pressed against the bathtub side wall, there is a problem that the main frame and the handrail attached to the main body frame are separated from the bathtub side wall, and the handrail cannot be mounted at a desired position on the bathtub side wall.

  For example, in the case of a bathtub handrail described in Japanese Utility Model Laid-Open Publication No. 3-60590 (Patent Document 3) and Japanese Patent Application Laid-Open No. 2002-143017 (Patent Document 4), a main body frame mounted on a bathtub side wall is disclosed. By screwing the movable frame attached to the movable frame and retracting the pulling portion supported at the tip of the movable frame toward the side wall of the bathtub, the handrail for the bathtub can be firmly attached to the side wall of the bathtub.

  In this type of handrail for a bathtub, after the main frame is placed on the side wall of the bathtub, and then the pulling portion is pulled toward the side wall of the bathtub, the main frame and the handrail attached to the main frame are removed from the side wall of the bathtub. There is no problem of moving away. However, in the case of this type of handrail for a bathtub, a torque transmission mechanism as described in Patent Literatures 1 and 2 has not been developed, and therefore, a user turns a handle or a knob to pull the pressure portion. If the drawing-in force is strong, the side wall of the bathtub is damaged, and if the drawing-in force is insufficient, the handrail for the bathtub is detached from the side wall of the bathtub.

  Further, in the case of the bathtub handrails described in Patent Documents 1 and 2, the bolt shaft moves forward or backward relative to the main body frame, and when the bathtub handrail is attached to the bathtub side wall, the bolts are removed. A compressive stress is generated on the shaft. On the other hand, in the case of the handrails for bathtubs described in Patent Literatures 3 and 4, the movable frame moves forward or backward relative to the main body frame, so that the bolt shaft moves relative to the main body frame. There is a difference that the bolt shaft does not move forward or backward, and when the bathtub handrail is attached to the bathtub side wall, a tensile stress is generated on the bolt shaft.

  In the case of the handrails for bathtubs described in Patent Literatures 1 and 2, the nut is supported by the body frame, and the bolt shaft advances and retreats with respect to the nut. In the case of the handrail for a bathtub described in 4, the nut is mounted in the movable frame, and there is also a difference that the movable frame to which the nut is mounted advances and retreats.

  For this reason, in the bathtub handrails described in Patent Literatures 3 and 4, even if an attempt is made to attach a rotation transmission blocking mechanism as described in Patent Literature 1, for example, the bolt shaft is not used with a nut. However, there is a problem that the rotation transmission blocking mechanism must be mounted so as not to interfere with the support point of the bolt shaft after being rotatably supported by the body frame. In addition, since a tensile stress is generated when the bathtub handrail is attached to the side wall of the bathtub on the bolt shaft, the torque transmission surface must be provided unless the rotation blocking mechanism is mounted so as to avoid the region where the tensile stress of the bolt shaft occurs. A change occurs in the gap between the shaft and the torque transmitting surface and the contact force (frictional force), so that there is a problem that the rotation cannot be interrupted for a constant torque.

  On the other hand, in the bathtub handrails described in Patent Documents 3 and 4, when an attempt is made to mount a torque transmission mechanism as described in Patent Document 2, for example, the nut is already mounted in the movable frame. Therefore, there is a problem that the nut itself for screwing and retracting the bolt shaft by transmitting the turning power of the handle knob does not exist.

JP 2010-246991 A WO2013-157078 International Publication Published Japanese Utility Model Application No. Hei 3-60590 JP-A-2002-143017

  Therefore, the present invention provides a bathtub handrail that is removably attached by clamping the side wall of the bathtub from the washing area side and the bathtub side, and the position and handle of the handrail attached to the main body frame with respect to the bathtub side wall before and after installation. An object of the present invention is to provide a handrail for a bathtub in which the position of the knob does not change and the side wall of the bathtub is prevented from being damaged due to excessive clamping force.

  In order to achieve the above object, the present inventors have proposed a bathtub handrail which is detachably attached by clamping a side wall of a bathtub from a washing place side and a bathtub side, in a clamping method of a bathtub side wall, a bolt shaft or a nut portion. As a result of intensive studies on the rotation support means and its mounting method, the torque cutoff transmission means and its configuration, the movable frame attached to the main body frame mounted on the bathtub side wall is advanced and retracted, It has been found that it is most beneficial to add a torque cutoff transmission function to a bathtub handrail based on a type that is attached to the bathtub side wall by pulling the pulling portion supported at the tip of the bathtub toward the bathtub side wall, The present invention has been completed.

  That is, according to the present invention, there is provided a main body frame including a horizontal portion arranged on the upper portion of the bathtub side wall, a contact portion abutting on one side surface of the bathtub side wall, and a nut portion. A movable frame slidably mounted on the main body frame, a pulling portion mounted on the movable frame and pressing the other side surface of the bathtub side wall, and rotatably supported by the main body frame. A bolt shaft screwed to a nut portion of the movable frame, a handle knob for rotating the bolt shaft to advance and retreat the movable frame, and, when the force is less than a predetermined force, the handle shaft is moved from the handle shaft to the bolt shaft. And a torque transmitting means for transmitting the rotational power to the bolt shaft when the force is greater than or equal to a predetermined force. Handrail is provided.

  The contact portion may be an integral part of the main body frame, or may be a separate part supported via a bolt shaft or the like supported by the main body frame. The fact that the main body frame includes the abutting portion means that it includes the configuration of both. In addition, the contact portion does not need to be disposed so as to be substantially the same size or substantially the same height as the pulling portion, and to be opposed to each other. May be arranged at a position narrower than the width in the height direction and relatively higher than the pulling portion.

  When the width in the height direction of the contact portion is smaller than the width in the height direction of the pulling portion, and the contact portion is disposed at a position relatively higher than the pulling portion, the rim portion having strength. Even if it is a bathtub side wall having an outer wall provided with an apron part having no strength, the pressing force of the contact part can be accurately guided to the strength part (rim part) of the bathtub side wall on the washing place side. The bathtub handrail can be securely and firmly attached to the bathtub side wall without damaging the vulnerable bathtub side wall portion such as the apron portion.

  When the contact portion is located at a position relatively higher than the pulling portion, the position of the center of the load by the contact portion on the washing area side and the position of the center of the load by the pulling portion on the bathtub side are shifted. As a result, a rotational moment is generated in the handrail for the bathtub so as to tilt the main body frame toward the washing place. For this reason, on the main body frame of the handrail for a bathtub, legs installed on the floor of the washing room are attached in order to support the rotating moment generated by the displacement of the clamp position on the washing room side and the bathtub side on the floor surface on the washing room side. May be.

  In the handrail for a bathtub of the present invention, a nut portion is provided inside the movable frame, and a bolt shaft screwed to the nut portion is rotatably attached to the main body frame. For this reason, in the present invention, the movable frame on which the nut portion is mounted is advanced and retracted by rotating the bolt shaft with the handle knob, and the pulling portion attached near the distal end of the movable frame is connected to the bathtub side wall. After the main frame is placed on the side wall of the bathtub, the main frame and the handrail attached to the main frame move from the side wall of the bathtub even if the pressure unit is pulled into the side wall of the bathtub. There is no problem of leaving. Further, in order to fix the handrail for the bathtub, it is not necessary to adjust the width from the washing place side using a pressing plate or the like.

  In the handrail for a bathtub according to the present invention, the main body frame is provided with a vertical wall having a through hole, and the bolt shaft is provided with a first flange portion having an outer diameter larger than the through hole. . Then, the bolt shaft is inserted into the through hole of the main body frame, and the second flange portion having a larger outer diameter than the through hole is inserted into the bolt shaft so as to sandwich the vertical wall of the main body frame from the opposite side of the first flange portion. By mounting, the bolt shaft is rotatably fixed to the main body frame so that the position of the bolt shaft itself does not move in the axial direction. In addition, when a resin washer or the like is disposed between the first flange portion and / or the second flange portion and the vertical wall, rattling of the bolt shaft is reduced, and the bolt shaft is attached to the vertical wall of the main body frame. Can be further smoothly rotated.

  In the handrail for a bathtub of the present invention, when the bolt shaft is fixed to the main body frame as described above, when the handrail for the bathtub is attached to the side wall of the bathtub, the bolt shaft has the pivot support from the connection portion with the movable frame. A tensile stress is generated only up to the portion, and the end side (the side farther than the connection portion with the movable frame) from the rotation supporting portion is a free end, so that no tensile stress is generated.

  Therefore, in the handrail for a bathtub of the present invention, by providing the torque transmitting means on the end portion side (the side farther than the connection portion with the movable frame) of the bolt shaft, the pulling generated on the bolt shaft is provided. Due to the stress, the gap between the torque transmitting surface and the torque transmitting surface of the torque transmitting means and the contact force (frictional force) change, or the torque transmission cannot be interrupted for a constant torque. Has been prevented. At the same time, the inconvenience that the torque transmitting means interferes with the first flange portion and the second flange portion of the bolt shaft has been solved.

  In the bathtub handrail of the present invention, as described above, the torque transmitting means is provided on the end side (the side farther than the connection with the movable frame) of the bolt shaft from the rotation supporting portion, so that the predetermined force is provided. When the value is less than the predetermined value, the rotation power is transmitted from the handle knob to the bolt shaft, and when the force is equal to or more than the predetermined force, the transmission of the rotation force from the handle knob to the bolt shaft can be blocked. Therefore, the bathtub handrail can be firmly attached to the bathtub side wall with a necessary and sufficient retraction force without damaging the side wall of the bathtub even if the user turns the handle knob and pulls in the pulling portion strongly. .

  In the bathtub handrail of the present invention, the bolt shaft is supported by the handle knob, and the handle knob can be rotatably fixed to the main body frame so that the rotation position does not move in the axial direction. For example, a vertical wall having a through hole is provided in the main body frame, an end portion having an outer diameter larger than the through hole is provided at an end portion of the handle knob, and a body portion of the handle knob is inserted into the through hole of the main body frame. Then, a second flange portion having an outer diameter larger than the through hole is attached to the handle knob so as to sandwich the vertical wall of the main body frame from the opposite side of the end portion of the handle knob. It can be rotatably fixed to the body frame so as not to move in the direction.

  In this case, the bolt shaft need not be rotatably fixed to the main body frame, so that the structure around the bolt shaft is simplified, and the maintainability of the bathtub handrail is improved. Further, if the bolt shaft is rotatably fixed to the handle knob so that the position of the bolt shaft does not move in the axial direction, the bolt shaft is located on the end side of the rotation support portion (farther than the connection portion with the movable frame). By setting the free side as the free end, the occurrence of tensile stress can be prevented, so that the torque transmitting means can be incorporated into the bolt shaft without being affected by the tensile stress.

  The torque transmitting means used in the present invention includes a transmitting portion having a torque transmitting surface which is synchronized with the rotation of the handle knob and which is orthogonal to the rotation axis of the handle knob; A transmitting portion having a torque transmitting surface that is in contact with the transmitting surface, and the torque transmitting surface and the torque transmitting surface each have a torque when the transmitted rotational power is less than a predetermined value. A concave portion having an inclined surface that locks the transmission surface and the torque transmission surface with each other and that, when the transmitted rotational power is equal to or more than a predetermined value, causes slippage between the torque transmission surface and the torque transmission surface; Alternatively, it has a feature of including a convex portion.

  In the torque transmitting means, the transmitting portion or the transmitting portion is movably mounted in the rotation axis direction of the handle knob, and the movably mounted transmitting portion is directed to the transmitting portion facing the transmitting portion. There is provided a transmission section urging means for urging the transmission section biasing means or a movably mounted transmission section toward a transmission section opposed to the transmission section.

  The center of the torque transmitting surface and the center of the torque transmitting surface of the torque transmitting means are arranged coaxially with the rotation axis of the handle knob and the bolt shaft. Further, on the torque transmitting surface and the torque transmitting surface, a concave / convex portion including a slope inclined from the torque transmitting surface or the torque transmitting surface is formed, respectively. The inclined surfaces of the torque transmitting surface and the inclined surface of the torque transmitting surface are inclined such that when turning the handle knob so as to pull the pressure portion of the movable frame toward the side wall of the bathtub, the inclined surfaces of the opposing sides are raised. Is attached.

  In one example, the annular transmitting portion having the torque transmitting surface is slidably mounted along the bolt axis, and is urged toward the torque transmitting surface by an elastic body (transmitting portion urging means). I have. The elastic body is not particularly limited as long as it can be elastically deformed, such as a coil spring, a disc spring, and an elastic resin material, and a known elastic body can be used.

  For this reason, a constant frictional force is always generated between the inclined surface of the torque transmitting surface and the inclined surface of the torque transmitting surface. When the torque transmitted from the handle knob to the bolt shaft is less than a predetermined value, the inclined surface of the torque transmitting surface cannot climb over the inclined surface of the torque transmitting surface, and engages with each other in a meshed state. I have. By this engagement, the torque of the handle knob is transmitted to the bolt shaft, and the movable frame provided with the nut portion screwed to the bolt shaft is advanced and retracted.

  On the other hand, when the torque transmitted from the handle knob to the bolt shaft is equal to or more than a predetermined value, the inclined surface of the torque transmitting surface slips with the inclined surface of the torque transmitting surface. As a result, the annular transmitting portion having the torque transmitting surface retreats against the elastic body, and the engagement between the two is released by the inclined surface of the torque transmitting surface riding over the inclined surface of the torque transmitting surface. For this reason, even if the handle knob is turned in this state, the handle knob only idles with respect to the bolt shaft, and no torque is transmitted from the handle knob to the bolt shaft.

  A vertical surface substantially perpendicular to the torque transmitting surface is formed at the rear end of the inclined surface of the torque transmitting surface, and a vertical surface substantially perpendicular to the torque transmitting surface is formed at the rear end of the inclined surface of the torque transmitting surface. Are formed. The vertical surface of the torque transmitting surface and the vertical surface of the torque transmitting surface come into contact with and engage with each other when the handle knob is turned so as to separate the pulling portion of the movable frame from the side wall of the bathtub. Therefore, when turning the handle knob so that the pulling portion is separated from the side wall of the bathtub, the handle knob and the bolt shaft always rotate in synchronization regardless of the magnitude of the transmitted torque.

  The torque transmitting means is a transmitting part having a torque transmitting surface as an annular part slidable along the bolt axis, and the transmitting part is mounted on the bolt shaft and is formed of an elastic body (transmission part urging means). As described above, the same effect as in the case where the transmission portion is formed as an annular component that can be urged toward the torque transmission surface can be obtained by biasing the transmission portion toward the torque transmission surface.

  In the torque transmitting means, the torque transmitting surface that rotates in synchronization with the rotation of the bolt shaft may be attached to the outer peripheral surface of the bolt shaft closer to the front end of the bolt shaft than to the rear end of the bolt shaft. In this case, the torque transmitting means can be disposed so as to partially overlap the vicinity of the rear end of the bolt shaft. Therefore, the projecting length of the torque transmitting means and the handle knob provided with the torque transmitting means from the main body frame is reduced. Can be suppressed.

  On the other hand, in the torque transmitting means, the torque transmitting surface that rotates in synchronization with the rotation of the bolt shaft may be attached to the rear end of the bolt shaft. In this case, the torque transmission means can be arranged in series using the free space so as to be separated from the rear end of the bolt shaft on the extension of the bolt shaft, so that the structure can be simplified and the bathtub hand can be used. The maintainability of the sliding can be improved.

  In the handrail for a bathtub according to the present invention, unlike the above-described torque transmitting means in which the torque transmitting surface and the torque transmitting surface are arranged so as to be orthogonal to the rotation axis of the handle knob and the bolt shaft, a second mode is provided. A torque transmitting means of a type in which a torque transmitting surface is provided on an inner peripheral surface of a handle knob (hereinafter, referred to as a "torque transmitting circumferential surface") and a torque transmitting surface is provided on an outer peripheral surface of a bolt shaft is used. You can also.

  More specifically, the above-mentioned torque transmission means is synchronized with the rotation of the handle knob, and has a substantially cylindrical torque transmission circumferential surface parallel to the rotation axis of the handle knob. A sliding portion having a sliding surface synchronized with the rotation of the rotation of the bolt shaft and slidingly contacting the torque transmitting circumferential surface; And a key groove disposed parallel to the sliding surface, and a torque transmitting surface contacting the torque transmitting circumferential surface, and in the key groove, with respect to the rotation axis of the bolt shaft. And a biasing means for biasing a torque transmitting surface of the key toward a torque transmitting circumferential surface of the handle knob, and a torque transmitting circle. When the transmitted rotational power is less than a predetermined value, the peripheral surface and the torque transmitting surface respectively An inclined surface that locks the peripheral surface and the torque transmitting surface with each other, and causes a slip between the torque transmitting circumferential surface and the torque transmitting surface when the transmitted rotating power is equal to or more than a predetermined value. It has the feature of including a concave portion or a convex portion.

  The circumference transmitting portion may be formed separately from or integrally with the handle knob, and the sliding portion may be formed separately from or integrated with the bolt shaft. However, since the torque transmission circumferential surface and sliding surface may be worn out after long-term use, it can be easily replaced if it is formed as a detachable part separate from the handle knob body and bolt shaft body. Can be convenient. In addition, if the circumference transmitting portion is formed as a separate part, the handle knob body, which does not require wear resistance, can be made of a plastic material or the like, so that processing around the handle knob and weight reduction become easy. There is a benefit.

  In this type of torque transmission means, the rotation axis of the torque transmission circumferential surface, the rotation axis of the sliding surface, and the rotation axis of the torque transmission surface are arranged coaxially with the rotation axes of the handle knob and the bolt shaft. Further, on the torque transmitting circumferential surface of the handle knob (circumferential transmitting portion), a concave / convex portion including a slope inclined further inward from the cylindrical torque transmitting circumferential surface is formed. On the other hand, on the sliding surface of the bolt shaft (sliding portion), a key groove arranged in parallel with the rotation axis of the bolt shaft is formed. A key that is movable in a radial direction with respect to the rotation axis is arranged. A concave / convex portion including an inclined surface is formed on the torque transmitting surface of the key, and the key is urged toward the torque transmitting circumferential surface by an elastic body (urging means). The elastic body is not particularly limited as long as it is elastically deformable, such as a coil spring, a disc spring, and an elastic resin material, and a known elastic body can be used.

  In addition, a stopper is disposed at an end of the circumference transmitting portion and the sliding portion (bolt shaft) of the torque transmitting means, and the stopper is screwed to an end surface of the sliding portion. For this reason, the circumference transmission portion and the handle knob fixed to the circumference transmission portion do not fall out of the sliding portion. In addition, when a resin washer is inserted between the end face of the circumferential transmission portion and the sliding portion and the stopper, rattling of the circumferential transmission portion and the sliding portion is suppressed, and the transmitted rotational power is a predetermined value. At this time, the circumference transmitting portion can smoothly rotate with respect to the stopper and the sliding portion.

  For this reason, a constant frictional force is always generated between the inclined surface of the torque transmitting circumferential surface and the inclined surface of the torque transmitting surface of the key. When the torque transmitted from the handle knob to the bolt shaft is less than a predetermined value, the inclined surfaces of the torque transmitting surfaces of the keys cannot climb over the inclined surfaces of the torque transmitting circumferential surfaces of the handle knobs. They are engaged with each other. Then, the torque of the handle knob is transmitted to the bolt shaft by this engagement, and the movable frame including the nut portion screwed with the bolt shaft is advanced and retracted.

  On the other hand, when the torque transmitted from the handle knob to the bolt shaft is equal to or more than a predetermined value, the inclined surface of the torque transmitting surface of the bolt shaft slides with the inclined surface of the torque transmitting circumferential surface of the handle knob. As a result, the key having the inclined surface retreats against the elastic body, and the engagement between the two is released by the inclined surface of the torque transmitting surface of the key climbing over the inclined surface of the torque transmitting circumferential surface of the handle knob. You. Therefore, even if the handle knob is turned in this state, the handle knob only rotates idly around the bolt axis, and no torque is transmitted from the handle knob to the bolt axis.

  A vertical surface substantially perpendicular to the torque transmitting circumferential surface is formed at the rear end of the inclined surface of the torque transmitting circumferential surface of the handle knob. Further, since the cross section of the key in the width direction has a substantially trapezoidal shape, a vertical surface substantially perpendicular to the inclined surface of the key is formed at the rear end of the inclined surface of the torque transmitting surface of the key. The vertical surface of the torque transmitting circumferential surface of the handle knob and the vertical surface of the key torque transmitting surface come into contact with and engage with each other when the handle knob is turned so as to separate the pulling portion from the side wall of the bathtub. Therefore, when turning the handle knob so as to separate the pulling portion from the side wall of the bathtub, the handle knob and the bolt shaft always rotate in synchronization regardless of the magnitude of the transmitted torque.

  As described above, the above-described torque transmitting means uses not the end face of the bolt shaft but the substantially cylindrical outer peripheral surface provided in parallel with the rotation axis of the bolt shaft. A key groove is provided on the outer peripheral surface (sliding surface) of the moving part), and a key having an inclined surface capable of engaging / disengaging by moving in a radial direction with respect to the rotation axis of the bolt shaft is provided in the key groove. The arrangement allows the torque to be reliably transmitted or cut off from the handle knob to the bolt shaft even when the gap between the inner peripheral surface of the handle knob and the outer peripheral surface of the bolt shaft is small.

  According to a third aspect of the present invention, a torque transmission unit is different from the above-mentioned bathtub handrail in which a movable frame on which a nut portion is mounted is advanced and retracted by rotating a bolt shaft. A bathtub handrail of a type in which the pressure portion attached to the tip of the movable frame is drawn toward the bathtub side wall by screwing and retracting the bolt shaft fixed non-rotatably with respect to the movable frame.

  Specifically, according to a third aspect of the present invention, there is provided a main body frame including a horizontal portion disposed on an upper portion of a bathtub side wall and a contact portion abutting on one side surface of the bathtub side wall. A movable frame slidably attached to the main body frame, and a puller attached to the movable frame to compress the other side surface of the bathtub side wall. A pressure portion, a nut portion rotatably fixed to the main body frame and screwed to a bolt shaft of the movable frame, and a handle knob for rotating the nut portion to advance and retreat the bolt shaft. A torque transmitting means for transmitting a rotational force from the handle knob to the nut portion when the force is less than a predetermined force, and interrupting a transmission of the rotational force from the handle knob to the nut portion when the force is equal to or more than a predetermined force; Tub handrail is provided which is characterized in that it comprises a.

  The contact portion may be an integral part of the main body frame, or may be a separate part supported via a bolt shaft or the like supported by the main body frame. The fact that the main body frame includes the abutting portion means that it includes the configuration of both.

  In the bathtub handrail according to the third aspect of the present invention, a bolt shaft is non-rotatably fixed to the movable frame, and a nut portion screwed to the bolt shaft is rotatably attached to the main body frame. Have been. For this reason, when the nut part attached to the main body frame is rotated by the handle knob, the movable frame to which the bolt shaft screwed with the nut part is fixed is advanced and retracted, and the pull attached to the tip of the movable frame is pulled. Since the pressure portion is drawn toward the bathtub side wall, after the main body frame is mounted on the bathtub side wall, even if the pulling portion is pulled into the bathtub side wall, the main frame and the handrail attached to the main body frame are still in the bathtub. There is no problem of moving away from the side wall. Further, in order to fix the handrail for the bathtub, it is not necessary to adjust the width from the washing place side using a pressing plate or the like.

  It is preferable that the handle knob is provided so as to be rotatable coaxially with respect to the nut portion, and has a storage chamber for storing the retracted bolt shaft inside the handle knob. Further, it is preferable that the handle knob is rotatably attached to the body frame similarly to the nut portion.

  If a storage chamber is provided inside the handle knob, the end of the bolt shaft can be stored in the storage chamber even when the movable frame is retracted to the main frame side. It is safe because it does not protrude outward from and is not exposed. When the nut is rotatably fixed to the body frame, the nut itself moves in the axial direction from the mounting position of the body frame even if the nut is rotated by the handle knob to screw the bolt shaft and the movable frame forward and backward. Therefore, the length of the handle knob projecting from the body frame can be suppressed.

  In the handrail for a bathtub according to the third aspect of the present invention, the horizontal portion has a vertical wall at an upper portion of the horizontal portion, and the nut portion has a body portion inserted into a through hole provided in the vertical wall. A first flange portion secured to the body and having an outer diameter greater than the through opening for abutting the vertical portion from one side, and a penetrating portion for abutting the vertical portion from the other side; A second flange portion having an outer diameter larger than the mouth and being detachably attached to the body portion, so as to be rotatably attached to the main body frame. Further, when a resin washer or the like is disposed between the first flange portion and / or the second flange portion and the vertical wall, rattling of the nut portion is reduced, and the nut portion with respect to the vertical wall of the main body frame is provided. Can be further smoothly rotated.

  In the bathtub handrail according to the third aspect of the present invention, when the bathtub handrail is attached to the bathtub side wall, tensile stress is generated on the bolt shaft, but tensile stress is not generated on the nut portion. For this reason, in the handrail for a bathtub of the third aspect of the present invention, by providing the torque transmitting means between the nut portion and the handle knob, the torque transmitting surface of the torque transmitting means is brought into contact with the torque transmitting surface by the tensile stress generated on the bolt shaft. The inconvenience that a gap between the torque transmitting surface and the contact force (frictional force) is changed, or the transmission of torque cannot be interrupted for a certain torque is prevented.

  In the handrail for a bathtub according to the third aspect of the present invention, as described above, the torque transmitting means is provided between the nut portion and the handle knob. When the force is transmitted and the force is equal to or more than a predetermined force, the transmission of the rotational force from the handle knob to the nut portion can be cut off. For this reason, even if the user turns the handle knob and pulls in the pulling portion strongly, the side wall of the bathtub is not damaged, and the bathtub handrail can be firmly attached to the bathtub side wall with necessary and sufficient retraction force. .

  In the bathtub handrail according to the third aspect of the present invention, the handle knob can be rotatably attached by using the vertical wall of the main body frame similarly to the nut portion. For example, the main body frame is provided with a vertical wall having a through hole, the end of the handle knob is provided with a first flange portion having an outer diameter larger than the through hole, and the handle knob body is inserted into the through hole of the main body frame. By inserting the second flange portion having an outer diameter larger than the through hole into the handle knob so as to sandwich the vertical wall of the main body frame from the side opposite to the end of the handle knob, the handle knob is rotated. It can be rotatably fixed to the body frame so that the position does not move in the axial direction.

  In this case, it is not necessary to rotatably fix the nut portion to the main body frame, so that the structure around the nut portion and the bolt axis is simplified, and the maintainability of the bathtub handrail is improved.

  The torque transmitting means used in the third aspect of the present invention includes: a transmitting portion having a torque transmitting surface synchronized with the rotation of the handle knob and having a torque transmitting surface orthogonal to the rotation axis of the handle knob; And a transmitting portion having a torque transmitting surface that is tuned and abuts against the torque transmitting surface. If the value is less than the predetermined value, the torque transmitting surface and the torque transmitting surface are locked to each other, and if the transmitted rotational power is equal to or more than a predetermined value, the slope that causes a slip between the torque transmitting surface and the torque transmitting surface is generated. It has the feature of including a concave or convex portion having a surface.

  In the torque transmitting means, the transmitting portion or the transmitting portion is movably mounted in the rotation axis direction of the handle knob, and the movably mounted transmitting portion is directed to the transmitting portion facing the transmitting portion. There is provided a transmission section urging means for urging the transmission section biasing means or a movably mounted transmission section toward a transmission section opposed to the transmission section.

  The center of the torque transmitting surface and the center of the torque transmitting surface of the torque transmitting means are arranged coaxially with the rotation axis of the handle knob and the nut portion. Further, on the torque transmitting surface and the torque transmitting surface, a concave / convex portion including a slope inclined from the torque transmitting surface or the torque transmitting surface is formed, respectively. The inclined surfaces of the torque transmitting surface and the inclined surface of the torque transmitting surface are inclined such that when turning the handle knob so as to pull the pressure portion of the movable frame toward the side wall of the bathtub, the inclined surfaces of the opposing sides are raised. Is attached.

  In one example, the annular transmitting portion having the torque transmitting surface is slidably mounted along the rotation axis of the handle knob and the nut portion, and is attached to the torque transmitting surface by an elastic body (transmitting portion urging means). It is biased toward. The elastic body is not particularly limited as long as it can be elastically deformed, such as a coil spring, a disc spring, and an elastic resin material, and a known elastic body can be used.

  For this reason, a constant frictional force is always generated between the inclined surface of the torque transmitting surface and the inclined surface of the torque transmitting surface. When the torque transmitted from the handle knob to the nut portion is less than a predetermined value, the inclined surface of the torque transmitting surface cannot climb over the inclined surface of the torque transmitting surface, and engages with each other in a meshed state. I have. By this engagement, the torque of the handle knob is transmitted to the nut portion, and the movable frame connected to the bolt shaft screwed with the nut portion is advanced and retracted.

  On the other hand, when the torque transmitted from the handle knob to the nut portion is equal to or greater than a predetermined value, the inclined surface of the torque transmitting surface slips with the inclined surface of the torque transmitting surface. As a result, the annular transmitting portion having the torque transmitting surface retreats against the elastic body, and the engagement between the two is released by the inclined surface of the torque transmitting surface riding over the inclined surface of the torque transmitting surface. For this reason, even if the handle knob is turned in this state, the handle knob only rotates idly with respect to the nut portion, and no torque is transmitted from the handle knob to the nut portion.

  A vertical surface substantially perpendicular to the torque transmitting surface is formed at the rear end of the inclined surface of the torque transmitting surface, and a vertical surface substantially perpendicular to the torque transmitting surface is formed at the rear end of the inclined surface of the torque transmitting surface. Are formed. The vertical surface of the torque transmitting surface and the vertical surface of the torque transmitting surface come into contact with and engage with each other when the handle knob is turned so as to separate the pulling portion of the movable frame from the side wall of the bathtub. Therefore, when the handle knob is turned so that the pulling portion is separated from the side wall of the bathtub, the handle knob and the nut always rotate in synchronization regardless of the magnitude of the transmitted torque.

  The torque transmitting means includes a transmitting portion having a torque transmitting surface as an annular component slidable along a rotation axis of the handle knob and the nut portion, and mounting the transmitting portion to the nut portion and using an elastic member ( As described above, the same effect as in the case where the transmission portion is formed as an annular component that can be biased toward the torque transmission surface can also be obtained by biasing the transmission portion toward the torque transmission surface by the transmission portion biasing means). Obtainable.

  In the torque transmitting means, the torque transmitting surface that rotates in synchronization with the rotation of the nut portion may be attached to the outer peripheral surface of the nut portion. In this case, since the torque transmitting means can be arranged so as to partially overlap the nut portion main body, the protrusion length of the torque transmitting means and the handle knob provided with the torque transmitting means from the main body frame can be suppressed. .

  In the bathtub handrail according to the fourth aspect of the present invention, unlike the above-described torque transmitting means in which the torque transmitting surface and the torque transmitting surface are arranged so as to be orthogonal to the rotation axis of the handle knob and the nut portion. A torque transmitting means provided on the inner peripheral surface of the handle knob (hereinafter referred to as "torque transmitting circumferential surface") and a torque transmitting surface provided on the outer peripheral surface of the nut portion. Can also.

  More specifically, the torque transmitting means includes a circumferential transmitting portion having a substantially cylindrical torque transmitting circumferential surface synchronized with the rotation of the handle knob and parallel to the rotation axis of the handle knob, and a nut portion. And a sliding portion provided with a sliding surface synchronized with the rotation of the nut and slidingly contacting the torque transmitting circumferential surface, and the sliding portion is parallel to the rotation axis of the nut portion. And a key groove disposed on the sliding surface, and a torque transmitting surface contacting the torque transmitting circumferential surface, and in the key groove, radially with respect to the rotation axis of the nut portion. A key movably disposed, and biasing means for biasing the torque transmitting surface of the key toward the torque transmitting circumferential surface of the handle knob, and comprising a torque transmitting circumferential surface and a torque. When the transmitted rotational power is less than a predetermined value, the transmitting surfaces respectively have a torque transmitting circumferential surface and a torque transmitting circumferential surface. When the transmitted power is greater than or equal to a predetermined value, a concave or convex portion having an inclined surface that causes slippage between the torque transmitting circumferential surface and the torque transmitting surface when the transmitted power is greater than or equal to a predetermined value. It has the feature of including a part.

  The circumference transmitting portion may be formed separately from or integrally with the handle knob, and the sliding portion may be formed separately from or integrally with the nut portion. However, the torque transmission circumferential surface and sliding surface may be worn out after long-term use, so if it is formed as a detachable part separate from the handle knob body and nut body, it can be easily replaced. Can be convenient. In addition, if the circumference transmitting portion is formed as a separate part, the handle knob body, which does not require wear resistance, can be made of a plastic material or the like, so that processing around the handle knob and weight reduction become easy. There is a benefit.

  In this type of torque transmission means, the rotation axis of the torque transmission circumferential surface, the rotation axis of the sliding surface, and the rotation axis of the torque transmission surface are arranged coaxially with the rotation axis of the handle knob and the nut. Further, on the torque transmitting circumferential surface of the handle knob (circumferential transmitting portion), a concave / convex portion including a slope inclined further inward from the cylindrical torque transmitting circumferential surface is formed. On the other hand, on the sliding surface of the nut portion (sliding portion), a key groove arranged in parallel with the rotation axis of the nut portion is formed. A key that is movable in a radial direction with respect to the rotation axis is arranged. A concave / convex portion including an inclined surface is formed on the torque transmitting surface of the key, and the key is urged toward the torque transmitting circumferential surface by an elastic body (urging means). The elastic body is not particularly limited as long as it is elastically deformable, such as a coil spring, a disc spring, and an elastic resin material, and a known elastic body can be used.

  For this reason, a constant frictional force is always generated between the inclined surface of the torque transmitting circumferential surface and the inclined surface of the torque transmitting surface of the key. When the torque transmitted from the handle knob to the nut portion is less than a predetermined value, the inclined surfaces of the torque transmitting surfaces of the keys cannot climb over the inclined surfaces of the torque transmitting circumferential surfaces of the handle knobs, so that the keys can not move together. They are engaged with each other. Then, the torque of the handle knob is transmitted to the nut portion by this engagement, and the movable frame connected to the bolt shaft screwed with the nut portion is advanced and retracted.

  On the other hand, when the torque transmitted from the handle knob to the nut portion is equal to or more than a predetermined value, the inclined surface of the torque transmitting surface of the nut portion slides between the inclined surface of the torque transmitting circumferential surface of the handle knob. As a result, the key having the inclined surface retreats against the elastic body, and the engagement between the two is released by the inclined surface of the torque transmitting surface of the key climbing over the inclined surface of the torque transmitting circumferential surface of the handle knob. You. Therefore, even if the handle knob is turned in this state, the handle knob only rotates around the nut portion, and no torque is transmitted from the handle knob to the nut portion.

  A vertical surface substantially perpendicular to the torque transmitting circumferential surface is formed at the rear end of the inclined surface of the torque transmitting circumferential surface of the handle knob. Further, since the cross section of the key in the width direction has a substantially trapezoidal shape, a vertical surface substantially perpendicular to the inclined surface of the key is formed at the rear end of the inclined surface of the torque transmitting surface of the key. The vertical surface of the torque transmitting circumferential surface of the handle knob and the vertical surface of the key torque transmitting surface come into contact with and engage with each other when the handle knob is turned so as to separate the pulling portion from the side wall of the bathtub. Therefore, when turning the handle knob so as to separate the pulling portion from the side wall of the bathtub, the handle knob and the nut always rotate in synchronization regardless of the magnitude of the transmitted torque.

  As described above, the above-described torque transmitting means uses not the end face of the nut portion but the substantially cylindrical outer peripheral surface provided in parallel with the rotation axis of the nut portion. A key groove is provided on the outer peripheral surface (sliding surface) of the moving part), and a key having an inclined surface capable of engaging / disengaging by moving in a radial direction with respect to the rotation axis of the nut part into the key groove. With the arrangement, even when the clearance between the inner peripheral surface of the handle knob and the outer peripheral surface of the nut portion is small, torque can be reliably transmitted or cut off from the handle knob to the nut portion.

  ADVANTAGE OF THE INVENTION According to the handrail for bathtubs of this invention, in the handrail for bathtub detachably attached by clamping the side wall of a bathtub from the washroom side and the bathtub side, the hand attached to the main body frame with respect to the bathtub side wall before and after attachment. The position of the slide and the position of the handle knob do not change. In the present invention, if the main body frame of the bathtub handrail or the contact portion of the main body frame is brought into contact with the bathtub side wall from the washing place side, the bathtub handrail is fixed only by the pulling portion disposed on the bathtub side. Can be adjusted, so that it is not necessary to adjust the width from the washing place side using a pressing plate or the like.

  Further, according to the bathtub handrail of the present invention, even if the user turns the handle knob and pulls in the pulling portion strongly, the side wall of the bathtub is not damaged, and the bathtub handrail has a necessary and sufficient retraction force. Can be firmly attached to the bathtub side wall. In particular, in the handrail for a bathtub of the present invention, when the handrail for a bathtub is attached to the side wall of the bathtub, the torque transmitting means can be arranged at a portion where no tensile stress is generated on the bolt shaft. There is no problem that the gap between the torque transmitting surface and the contact force (frictional force) changes, or the transmission of torque cannot be interrupted for a constant torque.

  The bathtub handrail of the present invention is of a type in which the movable frame is pulled into the main body frame side to clamp the bathtub side wall, and the torque transmitting means is partially connected to the rear end portion of the bolt shaft or the outer peripheral surface of the nut portion. Because the movable knobs can be arranged so as to overlap, the length of the handle knob projecting from the main body frame for screwing the movable frame forward and backward can be greatly reduced.

It is a schematic diagram of the handrail for bathtubs of this invention. It is the schematic of the state which removed the decorative cover and upper grip of the handrail for bathtubs shown in FIG. It is a side view of the handrail for bathtubs shown in FIG. It is sectional drawing which cut out the handrail for bathtub provided with the torque transmission means of the 1st aspect along the axis of the bolt shaft. FIG. 5 is an exploded view showing a state in which a bolt shaft, a handle knob, and a torque transmitting unit shown in FIG. 4 are disassembled along a rotation axis. It is sectional drawing which cut off the handrail for bathtub provided with the torque transmission means of the 2nd aspect along the axis of the bolt axis. It is sectional drawing which cut out the handrail for bathtubs shown in FIG. 6 by XX cross section. FIG. 7 is an exploded view showing a state in which a bolt shaft, a handle knob, and a torque transmitting unit shown in FIG. 6 are disassembled along a rotation axis. It is sectional drawing which cut off the handrail for bathtub provided with the torque transmission means of the 3rd aspect along the axis of the bolt shaft. FIG. 10 is an exploded view showing a state where a bolt shaft, a nut portion, a handle knob, and a torque transmitting unit shown in FIG. 9 are disassembled along a rotation axis. It is sectional drawing which cut off the handrail for bathtub provided with the torque transmission means of the 4th aspect along the axis of the bolt axis. It is sectional drawing which cut out the handrail for bathtubs shown in FIG. 11 in the YY cross section. FIG. 12 is an exploded view showing a state where a bolt shaft, a nut portion, a handle knob, and a torque transmitting unit shown in FIG. 11 are disassembled along a rotation axis. FIG. 4 is a side view of a modified bathtub handrail shown in FIG. 3.

  Hereinafter, a handrail for a bathtub according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below, and various modifications can be made without departing from the technical idea of the present invention.

First Embodiment A main configuration of a bathtub handrail 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows the general outline of the bathtub handrail 1 according to the present embodiment, and FIG. 2 shows the decorative covers 20, 21 and the upper grip 24 of the bathtub handrail 1 shown in FIG. The entire outline of a state in which is removed is shown.

  As shown in FIGS. 1 and 2, the bathtub handrail 1 mainly includes a substantially L-shaped main body frame 2, a substantially L-shaped movable frame 3 slidably attached to the main body frame 2, It comprises a handle knob 7 for screwing the movable frame 3 forward and backward, and an upper grip 24 and a side grip 25 for supporting a user's body. In particular, the outline of the bathtub handrail 1 of the present embodiment shown in FIG. 1 is basically the outline of a bathtub handrail 1a according to a second embodiment described later, and the bathtub handrail according to the third embodiment. The outline of the handrail 1b and the outline of the bathtub handrail 1c according to the fourth embodiment are substantially the same.

  FIG. 3 shows a side view of the bathtub handrail 1 of the present embodiment. FIG. 4 shows the bathtub handrail 1 of the present embodiment cut out along the axis of the bolt shaft 6. A cross section is shown. FIG. 14 is a side view of a modified bathtub handrail 1 shown in FIG. 3 which differs from the bathtub handrail 1 shown in FIG. 3 only in the shape of the contact portion 230.

  As shown in FIGS. 3 and 4, the main body frame 2 includes a horizontal portion 22 disposed on an upper portion of a bathtub side wall (not shown) and a vertical portion 23 disposed on one side surface of the bathtub side wall. Further, inside the vertical portion 23, a contact portion 230 (FIG. 3) for contacting one side surface of the bathtub side wall is formed. Although not shown, the contact portion 230 may be another component supported on the main body frame 2 via a bolt shaft or the like. Further, as shown in FIG. 3, the abutting portion 230 does not need to be arranged to be substantially the same size or substantially the same height as the pulling portion 5 so as to be opposed to each other. As shown in FIG. 5, the width of the contact portion 230 in the height direction may be smaller than the width of the suction portion 5 in the height direction, and may be disposed at a position relatively higher than the suction portion 5. .

  If the width of the contact portion 230 in the height direction is smaller than the width of the pressure portion 5 in the height direction, and the contact portion 230 is disposed at a position relatively higher than the pressure portion 5, the strength is increased. Even when the bathtub side wall has an outer wall provided with a rim portion having a rim portion and an apron portion having no strength, the pressing force of the contact portion 230 can be accurately guided to the strength portion (rim portion) of the bathtub side wall on the washing place side. Therefore, the bathtub handrail 1 can be securely and firmly attached to the bathtub side wall without damaging the fragile bathtub side wall portion such as the apron portion.

  Further, when the contact portion 230 is disposed at a position relatively higher than the pulling portion 5, the center of the load by the contact portion 230 on the washing room side and the center of the load by the pulling portion 5 on the bathtub side. A rotational moment is generated in the bathtub handrail 1 due to the displacement of the position, so that the main body frame 2 is inclined to the washing place side. For this reason, the body frame 2 of the handrail 1 for a bathtub is provided with a foot portion ( (Not shown) may be attached.

  Further, the handrail 1 for the bathtub is mainly provided with an upper grip 24 disposed above the side wall of the bathtub to assist in entering and exiting the bathtub, and a bathtub side (in the bathtub) for assisting bathing from the bathtub. And a side grip 25 to be arranged. The upper grip 24 is attached to the main body frame 2 so as to be able to move up and down using two legs 26, and the legs 26 are formed of two cylindrical portions 27 provided on the outer surface of the vertical portion 23 of the main body frame 2. It is slidably supported inside. The side grip 25 is detachably attached to the movable frame 3.

  The movable frame 3 has a nut portion 4 formed or provided therein, and has a horizontal portion 30 slidably attached to the horizontal portion 22 of the main body frame 2 and a vertical portion 31. A pulling portion 5 for pulling the other side surface of the bathtub side wall (clamping the bathtub side wall) from the opposite side of the contact portion 230 of the main body frame 2 to the vertical portion 31 is swingably attached.

  The bolt shaft 6 which is screwed with the nut portion 4 of the movable frame 3 is inserted through a through hole 280 of a vertical wall 28 provided on the upper surface of the horizontal portion 22 of the main body frame 2, and is rotatably supported by the vertical wall 28. Have been. A handle knob 7 for rotating the bolt shaft 6 is provided near the rear end of the bolt shaft 6. In addition, between the bolt shaft 6 and the handle knob 7, a rotation power is transmitted from the handle knob 7 to the bolt shaft 6 if the force is less than a predetermined force, and a rotation force is transmitted from the handle knob 7 to the bolt shaft 6 if the force is more than the predetermined force. A torque transmission means 8 for interrupting power transmission is incorporated.

  The handrail 1 for a bathtub according to the present embodiment is attached to the vertical portion 31 of the movable frame 3 by rotating the bolt shaft 6 with the handle knob 7 to advance and retreat the movable frame 3 having the nut portion 7. The main frame 2 can be pulled toward the bathtub side wall, so that the main body frame 2 can be pulled toward the bathtub side wall. There is no problem that the upper grip 24 attached to 2 moves away from the bathtub side wall. Further, in order to fix the handrail 1 for the bathtub, it is not necessary to adjust the width using a pressing plate or the like from the washing place side.

  In the bathtub handrail 1 of the present embodiment, the horizontal portion 22 of the main body frame 2 is provided with the vertical wall 28 having the through hole 280, and the bolt shaft 6 is inserted into the through hole 280. 60 and a first flange portion 61 having an outer diameter larger than the through-hole 280. Then, the body portion 60 of the bolt shaft 6 is inserted into the through hole 280 of the main body frame 2 so that the vertical wall 28 of the main body frame 2 is sandwiched from the opposite side of the first flange portion 61 so that the outer diameter is larger than the through hole 280. By fixing the second flange portion 62 having the screw 63 to the bolt shaft 6, the bolt shaft 6 is rotatably fixed to the main body frame 2 so that the position of the bolt shaft 6 itself does not move in the axial direction. A resin washer 64 is inserted between the first flange portion 61 and the vertical wall 28 and between the second flange portion 62 and the vertical wall 28 to prevent the bolt shaft 6 from rattling. The rotation of the bolt shaft 6 with respect to the vertical wall 28 of the main body frame 2 is made smooth.

  In the bathtub handrail 1 of the present embodiment, when the bolt shaft 6 is fixed to the main body frame 2 as described above, when the bathtub handrail 1 is attached to the bathtub side wall, the bolt shaft 6 is connected to the movable frame 3. Tensile stress is generated only between the connection portion and the rotation support portion, and the end side (the side farther from the connection portion with the movable frame 3) than the rotation support portion is a free end. Does not occur.

  Therefore, in the bathtub handrail 1 of the present embodiment, the torque transmission means 8 is provided on the end side (the side farther than the connection part with the movable frame 3) from the rotation supporting portion of the bolt shaft 6, and Due to the tensile stress generated in the bolt shaft 6, a gap or a contact force (frictional force) between the torque transmitting surface 82 and the torque transmitting surface 83 (see FIG. 5) of the torque transmitting means 8 is changed, or is constant. The inconvenience of being unable to interrupt transmission of torque with respect to torque is prevented. At the same time, the inconvenience that the torque transmitting means 8 interferes with the first flange portion 61 and the second flange portion 62 of the bolt shaft 6 has been solved.

  In the handrail 1 for a bathtub according to the present embodiment, as described above, the torque transmission means 8 is provided on the end side (the side farther than the connection part with the movable frame) of the rotation supporting portion of the bolt shaft 6. When the force is less than the predetermined force, the rotation power is transmitted from the handle knob 7 to the bolt shaft 6, and when the force is more than the predetermined force, the transmission of the rotation power from the handle knob 7 to the bolt shaft 6 can be cut off. For this reason, even if the user turns the handle knob 7 and pulls the pulling portion 5 (FIG. 3) strongly, the side wall of the bathtub is not damaged, and the bathtub handrail 1 is provided with necessary and sufficient pulling force. Can be firmly attached to

  FIG. 4 shows an outline of a state in which the bolt shaft 6, the handle knob 7, and the torque transmitting means 8 are disassembled along the rotation axis. As shown in FIG. 4, the torque transmitting means 8 used in the present embodiment has a torque transmitting surface 82 synchronized with the rotation of the handle knob 7 and having a torque transmitting surface 82 orthogonal to the rotation axis of the handle knob 7. And a transmission portion 81 having a torque transmission surface 83 synchronized with the rotation of the bolt shaft 6 and abutting against the torque transmission surface 82. Each of the receiving surfaces 83 locks the torque transmitting surface 82 and the torque transmitting surface 83 with each other when the transmitted rotational power is less than a predetermined value. It has a feature that it includes a concave portion or a convex portion having an inclined surface that causes a slip between the torque transmitting surface 82 and the torque transmitting surface 83.

  Further, the torque transmitting means 8 includes a transmitting portion 80 movably attached in the rotation axis direction of the handle knob 7, and a transmitting portion 80 movably attached to the transmitting portion 81 facing the transmitting portion 80. There is provided a transmission section urging means 84 for urging the transmission section toward. The end of the transmitting portion urging means 84 is fixed by a stopper 86 attached to an end of the bolt shaft 6 by a screw 85.

  The center of the torque transmitting surface 82 of the torque transmitting means 8 and the center of the torque transmitting surface 83 are coaxial with the handle knob 7 and the rotation axis of the bolt shaft 6. Further, on the torque transmitting surface 82 and the torque transmitting surface 83, a concave / convex portion including a slope inclined from the torque transmitting surface 82 or the torque transmitting surface 83 is formed, respectively. The inclined surfaces of the torque transmitting surface 82 and the inclined surface of the torque transmitting surface 83 are opposed to each other when the handle knob 7 is turned so as to pull the pulling portion 5 of the movable frame 3 toward the bathtub side wall. It is graded to ascend.

  The annular transmission portion 80 having the torque transmission surface 82 is slidably mounted along the bolt shaft 6 and is urged toward the torque transmission surface 83 by an elastic body (transmission portion urging means) 84. Have been. The elastic body 84 is not particularly limited as long as it is elastically deformable, such as a coil spring, a disc spring, and an elastic resin material, and a known elastic body can be used.

  Therefore, a constant frictional force is always generated between the inclined surface of the torque transmitting surface 82 and the inclined surface of the torque transmitting surface 83. When the torque transmitted from the handle knob 7 to the bolt shaft 6 is less than a predetermined value, the inclined surface of the torque transmitting surface 82 cannot climb over the inclined surface of the torque transmitting surface 83 and is engaged with each other. Is engaged. By this engagement, the torque of the handle knob 7 is transmitted to the bolt shaft 6, and the movable frame 3 to which the nut portion 4 screwed with the bolt shaft 6 is attached is reciprocated.

  On the other hand, when the torque transmitted from the handle knob 7 to the bolt shaft 6 exceeds a predetermined value, the inclined surface of the torque transmitting surface 82 slides with the inclined surface of the torque transmitting surface 83. As a result, the annular transmitting portion 80 provided with the torque transmitting surface 82 retreats against the elastic body 84, and the inclined surface of the torque transmitting surface 82 gets over the inclined surface of the torque transmitting surface 83. Is released. Therefore, even if the handle knob 7 is turned in this state, the handle knob 7 only idles with respect to the bolt shaft 6, and no torque is transmitted from the handle knob 7 to the bolt shaft 6.

  A vertical surface substantially perpendicular to the torque transmitting surface 82 is formed at the rear end of the inclined surface of the torque transmitting surface 82, and substantially perpendicular to the torque transmitting surface 83 at the rear end of the inclined surface of the torque transmitting surface 83. An orthogonal vertical plane is formed. The vertical surface of the torque transmitting surface 82 and the vertical surface of the torque transmitting surface 83 come into contact with and engage with each other when the handle knob 7 is turned so as to separate the pulling portion 5 of the movable frame 3 from the side wall of the bathtub. Therefore, when turning the handle knob 7 so that the pulling portion 5 is separated from the side wall of the bathtub, the handle knob 7 and the bolt shaft 6 always rotate in synchronization regardless of the magnitude of the transmitted torque. .

  As described above, in the bathtub handrail 1 of the present embodiment, in the torque transmitting unit 8, the torque transmitting surface 83 that rotates in synchronization with the rotation of the bolt shaft 6 is more bolted than the rear end of the bolt shaft 6. The shaft 6 is attached to the outer peripheral surface of the bolt shaft 6 on the tip end side. For this reason, the torque transmitting means 8 can be disposed so as to partially overlap the vicinity of the rear end of the bolt shaft 6, so that the torque transmitting means 8 and the main body frame 2 of the handle knob 7 having the torque transmitting means 8 are provided. The length of protrusion from the projection can be suppressed.

  Although not shown, the torque transmitting means includes a transmitting portion having a torque transmitting surface as an annular component slidable along the bolt shaft 6, and mounting the transmitting portion on the bolt shaft 6 and using an elastic member ( As described above, the transmission portion 80 can also be urged toward the torque transmission surface 83 by being urged toward the torque transmission surface by the transmission portion urging means) 84, as described above. The effect of can be obtained.

Second Embodiment Next, a bathtub handrail 1a according to a second embodiment of the present invention will be described with reference to FIGS. The handrail 1a for a bathtub according to the present embodiment has the torque of the first embodiment in which the torque transmitting surface 82 and the torque transmitting surface 83 are arranged to be orthogonal to the rotation axis of the handle knob 7 and the bolt shaft 6. Unlike the transmitting means 8, as a second mode, a torque transmitting surface is provided on the inner peripheral surface of the handle knob 7 (hereinafter, referred to as a "torque transmitting circumferential surface 82a"), and the torque transmitting surface 83a is connected to the bolt shaft 6a. It has basically the same configuration as the bathtub handrail 1 of the first embodiment except that a type of torque transmission means 8a provided on the outer peripheral surface of the bathtub is used. For this reason, the bathtub handrail 1a of the present embodiment can basically exert the same effect as the bathtub handrail 1 of the first embodiment, and therefore the bathtub handrail 1 of the first embodiment can be provided. Descriptions of overlapping configurations, effects, and installation methods will be omitted.

  FIG. 6 is a cross-sectional view of the bathtub handrail 1a provided with the torque transmission means 8a of the second embodiment, which is cut along the axis of the bolt shaft 6a. A cross-sectional view of the bathtub handrail 1a taken along a line XX is shown. FIG. 8 shows an outline of a state where the bolt shaft 6a, the handle knob 7a, and the torque transmitting means 8a are disassembled along the rotation axis.

  More specifically, the torque transmitting means 8a according to the second embodiment includes a substantially cylindrical torque transmitting circumferential surface 82a synchronized with the rotation of the handle knob 7a and parallel to the rotation axis of the handle knob 7a. And a sliding portion 81a having a sliding surface 830a synchronized with the rotation of the rotation of the bolt shaft 6a and slidably contacting the torque transmitting circumferential surface 82a, and The sliding portion 81a has a key groove 831a parallel to the rotation axis of the bolt shaft 6a and provided on the sliding surface 830a, and a torque transmitting surface 83a abutting on the torque transmitting circumferential surface 82a. And a key 87a arranged in the key groove 831a so as to be movable in a radial direction with respect to the rotation axis of the bolt shaft 6a, and a torque transmitting surface 83a of the key 87a is connected to the handle knob 7a by the handle knob 7a. Toward torque transmission circumferential surface 82a And a torque transmitting circumferential surface 82a and a torque transmitting surface 83a, respectively. When the transmitted rotational power is less than a predetermined value, the torque transmitting circumferential surface 82a and the torque transmitting An inclined surface that locks the transmission surface 83a with each other, and causes a slip between the torque transmission circumferential surface 82a and the torque transmission surface 83a when the transmitted rotational power is equal to or more than a predetermined value. It has the feature of including a concave portion or a convex portion.

  In addition, in consideration of the fact that the torque transmitting circumferential surface 82a may be worn when the torque transmitting circumferential surface 82a is used for a long period of time, the circumference transmitting portion 80a of the second aspect is detachable and attachable separately from the handle knob 7a main body. Since it is formed as a part, it can be easily replaced and is convenient. Further, since the handle knob 7a body, which does not require wear resistance, can be made of a plastic material or the like, there is an advantage that the processing around the handle knob 7a and the weight reduction can be easily performed.

  In the torque transmission means 8a of the second embodiment, the rotation axis of the torque transmission circumferential surface 82a, the rotation axis of the sliding surface 830a, and the rotation axis of the torque transmission surface 83a are the same as the rotation axes of the handle knob 7a and the bolt shaft 6a. They are arranged coaxially. Further, on the torque transmitting circumferential surface 82a of the handle knob 7a (circumferential transmitting portion 80a), a concave / convex portion including a slope inclined further inward from the cylindrical torque transmitting circumferential surface 82a is formed. . On the other hand, on the sliding surface 830a of the bolt shaft 6a (sliding portion 81a), a key groove 831a disposed parallel to the rotation axis of the bolt shaft 6a is formed. Is provided with a key 87a that is movable in the radial direction with respect to the rotation axis of the bolt shaft 6a. A concave / convex portion including an inclined surface is formed on the torque transmitting surface 83a of the key 87a, and the key 87a is urged toward the torque transmitting circumferential surface 82a by an elastic body (urging means) 84a. I have. The elastic body 84a is not particularly limited as long as it can be elastically deformed, such as a coil spring, a disc spring, and an elastic resin material, and a known elastic body can be used.

  Further, a stopper 86a is disposed at an end of the circumferential transmitting portion 80a and the sliding portion 81a (the bolt shaft 6a) of the torque transmitting means 8a, and the stopper 86a is fixed to an end face of the sliding portion 81a with a screw 85a. For this reason, the circumference transmission portion 80a and the handle knob 7a fixed to the circumference transmission portion 80a do not fall off the sliding portion 81a. Although not shown, if a resin washer is inserted between the stopper 86a and the end face of the circumferential transmission portion 80a and the sliding portion 81a, rattling of the circumferential transmission portion 80a and the sliding portion 81a is suppressed, When the transmitted rotational power is equal to or greater than a predetermined value, the circumferential transmission portion 80a can smoothly rotate with respect to the stopper 86a and the sliding portion 81a.

  Therefore, a constant frictional force is always generated between the inclined surface of the torque transmitting circumferential surface 82a and the inclined surface of the torque transmitting surface 83a of the key 87a. When the torque transmitted from the handle knob 7a to the bolt shaft 6a is less than a predetermined value, the inclined surface of the torque transmitting surface 83a of the key 87a goes over the inclined surface of the torque transmitting circumferential surface 82a of the handle knob 7a. Cannot be engaged with each other. Then, the torque of the handle knob 7a is transmitted to the bolt shaft 6a by this engagement, and the movable frame 3a having the nut portion 4a screwed with the bolt shaft 6a is advanced and retracted.

  On the other hand, when the torque transmitted from the handle knob 7a to the bolt shaft 6a becomes equal to or more than a predetermined value, the inclined surface of the torque transmitting surface 83a of the bolt shaft 6a is in contact with the inclined surface of the torque transmitting circumferential surface 82a of the handle knob 7a. A slip occurs between them. As a result, the key 87a having the inclined surface retreats against the elastic body 84a, and the inclined surface of the torque transmitting surface 83a of the key 87a climbs over the inclined surface of the torque transmitting circumferential surface 82a of the handle knob 7a. Is disengaged. Therefore, even if the handle knob 7a is turned in this state, the handle knob 7a only idles around the bolt shaft 6a, and no torque is transmitted from the handle knob 7a to the bolt shaft 6a.

  A vertical surface substantially perpendicular to the torque transmitting circumferential surface 82a is formed at the rear end of the inclined surface of the torque transmitting circumferential surface 82a of the handle knob 7a. Further, since the cross section of the key 87a in the width direction has a substantially trapezoidal shape, a vertical surface substantially orthogonal to the inclined surface of the key 87a is formed at the rear end of the inclined surface of the torque transmitting surface 83a of the key 87a. ing. The vertical surface of the torque transmitting circumferential surface 82a of the handle knob 7a and the vertical surface of the torque transmitting surface 83a of the key 87a are turned by turning the handle knob 7a so as to separate the pulling portion 5a (not shown) from the side wall of the bathtub. Sometimes, they abut and engage with each other. Therefore, when turning the handle knob 7a so as to separate the pulling portion 5a from the side wall of the bathtub, the handle knob 7a and the bolt shaft 6a always rotate in synchronization regardless of the magnitude of the transmitted torque.

  As described above, the torque transmission means 8a of the second embodiment utilizes the substantially cylindrical outer peripheral surface provided in parallel with the rotation axis of the bolt shaft 6a, instead of the end surface of the bolt shaft 6a. Provided a key groove 831a on the outer peripheral surface (sliding surface 830a) of the bolt shaft 6a (sliding portion 81a), and moved radially with respect to the rotation axis of the bolt shaft 6a into the key groove 831a. Since the key 87a having the inclined surface that can be engaged / disengaged is arranged, even when the gap between the inner peripheral surface of the handle knob 7a and the outer peripheral surface of the bolt shaft 6a is small, the torque is reliably transmitted from the handle knob 7a to the bolt shaft 6a. Can be transmitted or blocked.

Third Embodiment Next, a bathtub handrail 1b according to a third embodiment of the present invention will be described with reference to FIGS. The bathtub handrail 1b of the present embodiment is different from the bathtub handrail 1 of the first embodiment, in which the movable frame 3 on which the nut portion 4 is mounted is advanced and retracted by rotating the bolt shaft 6. As a third mode, the torque transmitting means 8b is different, and the bolt shaft 6b fixed non-rotatably to the movable frame 3b is screwed forward and backward, so that the pulling portion 5b attached to the tip of the movable frame 3b. It has basically the same configuration as the bathtub handrail 1 of the first embodiment, except that it is a bathtub handrail 1b of a type that draws (not shown) toward the bathtub side wall. For this reason, the bathtub handrail 1b of the present embodiment can basically provide the same effect as the bathtub handrail 1 of the first embodiment, and therefore, the bathtub handrail 1 of the first embodiment can be provided. Descriptions of overlapping configurations, effects, and installation methods will be omitted.

  FIG. 9 is a cross-sectional view of the bathtub handrail 1b provided with the torque transmitting means 8b according to the third embodiment, which is cut along the axis of the bolt shaft 6b. An outline of a state where the bolt shaft 6b, the handle knob 7b, and the torque transmitting means 8b are disassembled along the rotation axis is shown.

  As shown in FIG. 9, the handrail 1 b for a bathtub according to the third embodiment includes a main body frame 2 b having a horizontal portion 22 b disposed above a bathtub side wall (not shown) and one side surface of the bathtub side wall. And a contact portion 230b for contacting one side surface of the bathtub side wall is formed inside the vertical portion 23b. Although not shown, the contact portion 230b may be another component supported by the main body frame 2 via a bolt shaft or the like.

A bolt shaft 6b is fixed to the movable frame 3b by a pin 65b so as not to rotate.
Further, it has a horizontal portion 30b slidably attached to the horizontal portion 22b of the main body frame 2b, and a vertical portion 31b. A pulling portion 5b (not shown) for pulling the other side of the bathtub side wall (clamping the bathtub side wall) from the opposite side of the contact portion 230b of the main body frame 2b to the vertical portion 31b is swingable. Installed.

  The nut portion 4b screwed with the bolt shaft 6b of the movable frame 3b is rotatably supported by a vertical wall 28b provided on the upper surface of the horizontal portion 22b of the main body frame 2b. Further, a handle knob 7b for rotating the nut portion 4b is provided on the nut portion 4b. Further, between the nut portion 4b and the handle knob 7b, rotation power is transmitted from the handle knob 7b to the nut portion 4b when the force is less than a predetermined force, and the rotation force is transmitted from the handle knob 7b to the nut portion 4b when the force is more than the predetermined force. A torque transmitting means 8b for interrupting power transmission is incorporated.

  In the bathtub handrail 1b according to the third embodiment of the present invention, a bolt shaft 6b is fixed to the movable frame 3b so as not to rotate, and a nut portion screwed to the bolt shaft 6b is attached to the main body frame 2b. 4b is rotatably mounted. For this reason, when the nut portion 4b attached to the main body frame 2b is rotated by the handle knob 7b, the movable frame 3b to which the bolt shaft 6b screwed with the nut portion 4b is fixed is advanced and retracted. Since the pulling portion 5b attached to the tip of the main body is drawn toward the bathtub side wall, after the main body frame 2b is placed near the bathtub side wall, even if the pulling portion 5b is drawn into the bathtub side wall, the main body frame 2b and There is no problem that the upper grip 24 (see FIG. 1) attached to the main body frame 2b moves away from the bathtub side wall. Further, in order to fix the bathtub handrail 1b, it is not necessary to adjust the width from the washing place side using a pressing plate or the like.

  The handle knob 7b is coaxially rotatable with respect to the nut portion 4b, and has a storage chamber 70b for accommodating the retracted bolt shaft 6b inside the handle knob 7b.

  In the bathtub handrail 1b of the present embodiment, the end of the bolt shaft 6b can be accommodated in the storage chamber 70b even when the movable frame 3b is most retracted to the main body frame 2b side. The end portion is safe because it does not project outward from the main body frame 2b and is exposed. Further, since the nut portion 4b is rotatably fixed to the main body frame 2b, even if the nut portion 4b is rotated by the handle knob 7b to screw the bolt shaft 6b and the movable frame 3b forward and backward, the nut portion 4b itself is not rotated. Since it does not move in the axial direction from the mounting position of the main body frame 2b, the length of the handle knob 7b protruding from the main body frame 2b can be suppressed.

  In the bathtub handrail 1b of this embodiment, a vertical wall 28b having a through hole 280b is provided in the horizontal portion 22b of the main body frame 2b, and a body portion inserted into the through hole 280b is provided in the nut portion 4b. 40b, a first flange portion 41b fixed to the body portion 40b and having an outer diameter larger than the through hole 280b for abutting the vertical portion 280b from one side, and a vertical portion 280b from the other side. And a second flange portion 42b having an outer diameter larger than the through-hole 280b so as to be in contact with the main body frame 2b. In addition, a resin washer 44b is inserted between the first flange portion 41b and the second flange portion 42b and the vertical wall 28b to suppress rattling of the nut portion 4b and to prevent the nut portion 4b from rattling. The rotation of the nut portion 4b with respect to 28b is made smooth.

  In the bathtub handrail 1b of the present embodiment, when the bathtub handrail 1b is attached to the bathtub side wall, a tensile stress is generated on the bolt shaft 6b, but no tensile stress is generated on the nut portion 4b. For this reason, in the bathtub handrail 1b of this embodiment, the torque transmission means 8b is provided between the nut part 4b and the handle knob 7b, so that the torque transmission of the torque transmission means 8b is caused by the tensile stress generated in the bolt shaft 6b. This prevents the gap between the surface 82b and the torque transmitting surface 83b and the contact force (frictional force) from changing, or prevents the torque transmission from being interrupted for a certain torque.

  In the bathtub handrail 1b of the present embodiment, as described above, the torque transmitting means 8b is provided between the nut portion 4b and the handle knob 7b. Therefore, when the force is less than a predetermined force, the torque is transmitted from the handle knob 7b to the nut portion 4b. When the power is transmitted and the power is equal to or more than a predetermined force, the transmission of the rotational power from the handle knob 7b to the nut portion 4b can be cut off. For this reason, even if the user turns the handle knob 7b and pulls in the pulling portion 5b (not shown) strongly, the side wall of the bathtub is not damaged, and the bathtub handrail 1b is provided with a necessary and sufficient pulling force. Can be firmly attached to the side wall.

  As shown in FIG. 9, the torque transmission means 8b used in the present embodiment is a transmission having a torque transmission surface 82b synchronized with the rotation of the handle knob 7b and orthogonal to the rotation axis of the handle knob 7b. And a transmission portion 81b having a torque transmission surface 83b synchronized with the rotation of the nut portion 4b and abutting against the torque transmission surface 82b. Each of the receiving surfaces 83b locks the torque transmitting surface 82b and the torque transmitting surface 83b with each other when the transmitted rotational power is less than a predetermined value, and when the transmitted rotational power is equal to or more than the predetermined value, It is characterized in that it includes a concave portion or a convex portion having an inclined surface that causes a slip between the torque transmitting surface 82b and the torque transmitting surface 83b.

  Further, the torque transmitting means 8b has a transmitting portion 80b movably attached in the rotation axis direction of the handle knob 7b, and the movably attached transmitting portion 80b is connected to a transmitting portion 81b facing the transmitting portion 80b. There is provided a transmission section urging means 84b for urging toward. The end of the transmitting portion urging means 84b is fixed by a stopper 86b attached to an end of the nut portion 4b by a screw 85b.

  The center of the torque transmitting surface 82b of the torque transmitting means 8b and the center of the torque transmitting surface 83b are arranged coaxially with the rotation axis of the handle knob 7b and the nut portion 4b. Further, on the torque transmitting surface 82b and the torque transmitting surface 83b, a concave / convex portion including a slope inclined from the torque transmitting surface 82b or the torque transmitting surface 83b is formed, respectively. The inclined surface of the torque transmitting surface 82b and the inclined surface of the torque transmitting surface 83b are opposed to each other when the handle knob 7b is turned so as to pull the pressure portion 5b (not shown) of the movable frame 3b toward the bathtub side wall. A slope is provided so as to ascend the inclined surface of the other party.

  An annular transmitting portion 80b having a torque transmitting surface 82b is slidably mounted along the rotation axis of the handle knob 7b and the nut portion 4b, and receives torque by an elastic body (transmitting portion urging means) 84b. It is urged toward the surface 83b. The elastic body 84b is not particularly limited as long as it is elastically deformable, such as a coil spring, a disc spring, and an elastic resin material, and a known elastic body can be used.

  Therefore, a constant frictional force is always generated between the inclined surface of the torque transmitting surface 82b and the inclined surface of the torque transmitting surface 83b. When the torque transmitted from the handle knob 7b to the nut portion 4b is less than a predetermined value, the inclined surface of the torque transmitting surface 82b cannot climb over the inclined surface of the torque transmitting surface 83b, and is engaged with each other. Is engaged. By this engagement, the torque of the handle knob 7b is transmitted to the nut portion 4b, and the movable frame 3b connected to the bolt shaft 6b screwed with the nut portion 4b is advanced and retracted.

  On the other hand, when the torque transmitted from the handle knob 7b to the nut portion 4b exceeds a predetermined value, the inclined surface of the torque transmitting surface 82b slides between the inclined surface of the torque transmitting surface 83b. As a result, the annular transmitting portion 80b provided with the torque transmitting surface 82b retreats against the elastic body 84b, and the inclined surface of the torque transmitting surface 82b climbs over the inclined surface of the torque transmitting surface 83b, thereby engaging the two. Is released. Therefore, even if the handle knob 7b is turned in this state, the handle knob 7b only rotates idly with respect to the nut portion 4b, and no torque is transmitted from the handle knob 7b to the nut portion 4b.

  A vertical surface substantially perpendicular to the torque transmitting surface 82b is formed at the rear end of the inclined surface of the torque transmitting surface 82b, and substantially perpendicular to the torque transmitting surface 83b at the rear end of the inclined surface of the torque transmitting surface 83b. An orthogonal vertical plane is formed. The vertical surface of the torque transmitting surface 82b and the vertical surface of the torque transmitting surface 83b come into contact with each other when the handle knob 7b is turned so as to separate the pulling portion 5b (not shown) of the movable frame 3b from the side wall of the bathtub. Engage. Therefore, when turning the handle knob 7b so as to separate the pulling portion 5b from the side wall of the bathtub, the handle knob 7b and the nut portion 4b always rotate in synchronization regardless of the magnitude of the transmitted torque. .

  Thus, in the torque transmitting means 8b, the torque transmitting surface 83b that rotates in synchronization with the rotation of the nut 4b is attached to the outer peripheral surface of the nut 4b. For this reason, since the torque transmitting means 8b can be partially overlapped with the main body of the nut portion 4b, the projecting length of the torque transmitting means 8b and the handle knob 7b provided with the torque transmitting means 8b from the main body frame 2b. Can be suppressed.

  Although not shown, the torque transmitting means is configured such that the transmitting portion having the torque transmitting surface is an annular component slidable along the nut portion 4b, and the transmitting portion is mounted on the nut portion 4b and the elastic member ( As described above, the transmission portion 80b can be urged toward the torque transmission surface 83b by being urged toward the torque transmission surface by the transmission portion urging means) 84b. The effect of can be obtained.

Fourth Embodiment Next, a bathtub handrail 1c according to a fourth embodiment of the present invention will be described with reference to FIGS. The bathtub handrail 1c of the present embodiment is different from the bathtub handrail 1a of the second embodiment, in which the movable frame 3a on which the nut portion 4a is mounted advances and retreats by rotating the bolt shaft 6a. As a fourth mode, the torque transmitting means 8c is different, and the bolt shaft 6c fixed non-rotatably with respect to the movable frame 3c is advanced and retracted, whereby the pulling portion 5c attached to the tip of the movable frame 3c It has basically the same configuration as the bathtub handrail 1a of the second embodiment, except that it is a bathtub handrail 1c of a type that draws (not shown) toward the bathtub side wall.

  In other words, the bathtub handrail 1c of the present embodiment has a third configuration in which the torque transmission surface 82b and the torque transmission surface 83b are arranged so as to be orthogonal to the rotation axis of the handle knob 7b and the bolt shaft 6b. Unlike the torque transmitting means 8b of the fourth aspect, as a fourth aspect, a torque transmitting surface is provided on the inner peripheral surface of the handle knob 7c (hereinafter, referred to as a "torque transmitting circumferential surface 82c"), and a torque transmitting surface 83c is provided. Is basically the same as the bathtub handrail 1b of the third embodiment, except that a torque transmission means 8c of the type provided on the outer peripheral surface of the bolt shaft 6c is used. For this reason, the bathtub handrail 1c of the present embodiment can basically achieve the same effects as the bathtub handrails 1a and 1b of the second and third embodiments, and therefore, the second or third embodiment. Descriptions of configurations, effects, and installation methods overlapping with the bathtub handrail 1b of the embodiment will be omitted.

  FIG. 11 is a cross-sectional view of the bathtub handrail 1c provided with the torque transmitting means 8c of the fourth embodiment, taken along the axis of the bolt shaft 6c. FIG. A cross-sectional view of the bathtub handrail 1c taken along a YY section is shown. FIG. 13 shows an outline of a state in which the nut portion 4c, the bolt shaft 6c, the handle knob 7c, and the torque transmitting means 8c are disassembled along the rotation axis.

  More specifically, the torque transmitting means 8c is provided with a substantially cylindrical torque transmitting circumferential surface 82c synchronized with the rotation of the handle knob 7c and parallel to the rotation axis of the handle knob 7c. 80c and a sliding portion 81c provided with a sliding surface 830c synchronized with the rotation of the nut portion 4c and slidably in contact with the torque transmitting circumferential surface 82c. A key groove 831c parallel to the rotation axis of the portion 4c and disposed on the sliding surface 830c; and a torque transmitting surface 83c abutting on the torque transmitting circumferential surface 82c. Among the keys 831c, the key 87c arranged so as to be movable in the radial direction with respect to the rotation axis of the nut portion 4c, and the torque transmitting surface 83c of the key 87c to the torque transmitting circumferential surface 82c of the handle knob 7c. Biasing means for biasing toward 4c, and the torque transmitting circumferential surface 82c and the torque transmitting surface 83c are respectively connected to the torque transmitting circumferential surface 82c and the torque transmitting surface 83c when the transmitted rotational power is less than a predetermined value. A concave or convex portion having an inclined surface that locks with each other and causes slippage between the torque transmitting circumferential surface 82c and the torque transmitting surface 83c when the transmitted rotational force is equal to or more than a predetermined value. It has the characteristic that it is.

  In addition, in consideration of the fact that the torque transmitting circumferential surface 82c may be worn when the torque transmitting circumferential surface 82c is used for a long period of time, the circumference transmitting portion 80c of the fourth embodiment is detachable separately from the handle knob 7c main body. Since it is formed as a part, it can be easily replaced and is convenient. In addition, since the handle knob 7c body, which does not require wear resistance, can be made of a plastic material or the like, there is an advantage that the processing around the handle knob 7c and the weight reduction can be easily performed.

  In the torque transmission means 8c of the fourth embodiment, the rotation axis of the torque transmission circumferential surface 82c, the rotation axis of the sliding surface 830c, and the rotation axis of the torque transmission surface 83c are the same as the rotation axis of the handle knob 7c and the nut portion 4c. They are arranged coaxially. Further, on the torque transmitting circumferential surface 82c of the handle knob 7c (circumferential transmitting portion 80c), a concave / convex portion including a slope inclined further inward from the cylindrical torque transmitting circumferential surface 82c is formed. . On the other hand, on the sliding surface 830c of the nut portion 4c (sliding portion 81c), a key groove 831c arranged parallel to the rotation axis of the nut portion 4c is formed. Is provided with a key 87c that is movable in the radial direction with respect to the rotation axis of the nut portion 4c. A concave / convex portion including an inclined surface is formed on the torque transmitting surface 83c of the key 87c, and the key 87c is biased toward the torque transmitting circumferential surface 82c by an elastic body (biasing means) 84c. I have. The elastic body 84c is not particularly limited as long as it is elastically deformable, such as a coil spring, a disc spring, and an elastic resin material, and a known elastic body can be used.

  Therefore, a constant frictional force is always generated between the inclined surface of the torque transmitting circumferential surface 82c and the inclined surface of the torque transmitting surface 83c of the key 87c. When the torque transmitted from the handle knob 7c to the nut portion 4c is less than a predetermined value, the inclined surface of the torque transmitting surface 83c of the key 87c climbs over the inclined surface of the torque transmitting circumferential surface 82c of the handle knob 7c. Cannot be engaged with each other. Then, the torque of the handle knob 7c is transmitted to the nut portion 4c by this engagement, and the movable frame 3c connected to the bolt shaft 6c screwed with the nut portion 4c is advanced and retracted.

  On the other hand, when the torque transmitted from the handle knob 7c to the nut portion 4c is equal to or more than a predetermined value, the inclined surface of the torque transmitting surface 83c of the nut portion 4c is in contact with the inclined surface of the torque transmitting circumferential surface 82c of the handle knob 7c. A slip occurs between them. As a result, the key 87c having the inclined surface retreats against the elastic body 84c, and the inclined surface of the torque transmitting surface 83c of the key 87c climbs over the inclined surface of the torque transmitting circumferential surface 82c of the handle knob 7c. Is disengaged. Therefore, even if the handle knob 7c is turned in this state, the handle knob 7c only spins around the nut portion 4c, and no torque is transmitted from the handle knob 7c to the nut portion 4c.

  A vertical surface substantially perpendicular to the torque transmitting circumferential surface 82c is formed at the rear end of the inclined surface of the torque transmitting circumferential surface 82c of the handle knob 7c. Also, since the cross section of the key 87c in the width direction has a substantially trapezoidal shape, a vertical surface substantially perpendicular to the inclined surface of the key 87c is formed at the rear end of the inclined surface of the torque transmitting surface 83c of the key 87c. ing. The handle knob 7c is turned so that the vertical surface of the torque transmitting circumferential surface 82c of the handle knob 7c and the vertical surface of the torque transfer surface 83c of the key 87c are separated from the side wall of the bathtub by the pressure-pulling portion 5c (not shown). Sometimes, they abut and engage with each other. Therefore, when turning the handle knob 7c so as to separate the pulling portion 5c from the side wall of the bathtub, the handle knob 7c and the nut portion 4c always rotate in synchronization regardless of the magnitude of the transmitted torque.

  As described above, the torque transmission means 8c of the fourth embodiment uses not the end face of the nut portion 4c but the substantially cylindrical outer peripheral surface provided in parallel with the rotation axis of the nut portion 4c. Is provided with a key groove 831c on the outer peripheral surface (sliding surface 830c) of the nut portion 4c (sliding portion 81c), and moves into the key groove 831c in a radial direction with respect to the rotation axis of the nut portion 4c. Since the key 87c having the inclined surface that can be engaged / disengaged is arranged, even when the gap between the inner peripheral surface of the handle knob 7c and the outer peripheral surface of the nut portion 4c is small, torque can be reliably transmitted from the handle knob 7c to the nut portion 4c. Can be transmitted or blocked.

1, 1a, 1b, 1c ... handrail for bathtub 2, 2a, 2b, 2c ... body frame 20, 21 ... decorative cover 22, 22b ... horizontal part 23, 23b ... vertical part 230, 230b abutment portion 24 top grip 25 side grip 26 leg 27 cylindrical portion 28, 28a, 28b, 28c ..Vertical walls 280, 280b ... through-holes 3, 3a, 3b, 3c ... movable frames 30, 30b ... horizontal portions 31, 31b ... vertical portions 4, 4a, 4b, 4c ... Nut part 40b, 40c Body part 41b, 41c First flange part 42b, 42c Second flange part 43b, 43c Screw 44b, 44c ... resin washer 5, 5a, 5b, 5c ... pulling part 6, 6a, 6b, 6c Bolt shaft 60, 60a Body 61, 61a First flange 62, 62a Second flange 63, 63a Screw 64, 64a ···· Resin washers 65b, 65c ··· Pins 7, 7a, 7b, 7c ··· Handle knobs 70b and 70c ··· Storage chambers 8, 8a, 8b and 8c ··· Torque transmission means 80 80b ... transmission part 80a, 80c ... transmission circumference part 81, 81b ... transmission part 81a, 81c ... sliding part 82, 82b ... torque transmission surface 82a, 82c ... torque transmission Circumferential surface 83, 83a, 83b, 83c ... torque transmitting surface 830a, 830c ... sliding surface 831a, 831c ... key groove 84, 84a, 84b, 84c ... biasing means 85, 85a , 85b 86,86a, 86b ··· stopper 87a, 87c ··· key

Claims (15)

A main body frame including a horizontal portion disposed on the upper portion of the bathtub side wall, and a contact portion that is in contact with one side surface of the bathtub side wall;
A movable frame having a nut portion and slidably attached to the main body frame;
A pulling unit attached to the movable frame and pulling the other side surface of the bathtub side wall;
A bolt shaft rotatably supported by the main body frame and screwed to a nut portion of the movable frame;
A handle knob for rotating the bolt shaft to advance and retreat the movable frame; and, when the force is less than a predetermined force, a turning force is transmitted from the handle knob to the bolt shaft. And torque transmitting means for interrupting the transmission of rotational power from the bolt shaft to the bolt shaft, and
The abutting portion is attached to the main body frame so as not to advance and retreat, and the pulling portion is attached to the main body frame so as to advance and retract,
A tub hand, wherein the width of the contact portion in the height direction is smaller than the width of the pressure portion in the height direction, and is disposed at a position relatively higher than the pressure portion. Rubbing.   The handrail for a bathtub according to claim 1, wherein the bolt shaft and / or the handle knob is rotatably fixed to the main body frame so that a rotation position thereof does not move. The torque transmitting means,
A transmission unit synchronized with the rotation of the handle knob and having a torque transmission surface orthogonal to a rotation axis of the handle knob;
A transmitting portion having a torque transmitting surface synchronized with the rotation of the bolt shaft and abutting on the torque transmitting surface; and the torque transmitting surface and the torque transmitting surface are respectively provided. When the transmitted rotational power is less than a predetermined value, the torque transmitting surface and the torque transmitting surface are locked to each other, and when the transmitted rotational power is equal to or more than a predetermined value, the torque transmitting surface and the torque transmitting surface The handrail for a bathtub according to any one of claims 1 and 2, further comprising a concave portion or a convex portion having an inclined surface that causes slippage with the torque transmitting surface.   The torque transmitting unit may be configured such that the transmitting unit or the transmitting unit is movably mounted in a rotation axis direction of the handle knob, and the movably mounted transmitting unit faces the transmitting unit. Transmission section urging means for urging toward the transmission section, or transmission section urging means for urging the movably mounted transmission section toward the transmission section facing the transmission section. The handrail for a bathtub according to claim 3, comprising:   The torque transmission surface that rotates in synchronization with the rotation of the bolt shaft is attached to an outer peripheral surface of the bolt shaft closer to a front end portion of the bolt shaft than to a rear end portion of the bolt shaft. The handrail for a bathtub according to claim 3.   5. The bathtub according to claim 3, wherein the torque transmission surface that rotates in synchronization with the rotation of the bolt shaft is attached to a rear end of the bolt shaft. 6. Handrail. The torque transmitting means,
A circumference transmitting portion having a substantially cylindrical torque transmitting circumferential surface synchronized with the rotation of the handle knob and parallel to the rotation axis of the handle knob;
A sliding portion having a sliding surface synchronized with the rotation of the rotation of the bolt shaft and slidingly contacting the torque transmitting circumferential surface; and
A keyway parallel to the rotation axis of the bolt shaft and disposed on the sliding surface;
A key that has a torque transmitting surface that is in contact with the torque transmitting circumferential surface and is arranged in the key groove so as to be movable in a radial direction with respect to a rotation axis of the bolt shaft; and Urging means for urging the torque transmitting surface of the key toward the torque transmitting circumferential surface of the handle knob, and wherein the torque transmitting circumferential surface and the torque transmitting surface are respectively: When the transmitted rotational power is less than a predetermined value, the torque transmitting circumferential surface and the torque transmitting surface are mutually locked, and when the transmitted rotational force is equal to or more than a predetermined value, the torque transmitting circumferential surface is locked. The handrail for a bathtub according to any one of claims 1 and 2, comprising a concave portion or a convex portion having an inclined surface that causes a slip between a surface and the torque transmitting surface. . A main body frame including a horizontal portion disposed on the upper portion of the bathtub side wall, and a contact portion that is in contact with one side surface of the bathtub side wall;
A movable frame having a bolt shaft that is non-rotatably fixed and slidably attached to the main body frame;
A pulling unit attached to the movable frame and pulling the other side surface of the bathtub side wall;
A nut portion rotatably fixed to the main body frame and screwed to a bolt shaft of the movable frame;
A handle knob for rotating the nut portion to advance and retreat the bolt shaft; and, when the force is less than a predetermined force, a turning force is transmitted from the handle knob to the nut portion; And a torque transmitting means for interrupting transmission of rotational power from the nut to the nut portion.   9. The handrail for a bathtub according to claim 8, wherein the handle knob has a storage chamber for accommodating the retracted bolt shaft inside the handle knob. 10. The horizontal portion has a vertical wall above the horizontal portion,
The nut portion has a body portion that is inserted into a through hole provided in the vertical wall, and an outer diameter larger than the through hole that is fixed to the body portion and abuts the vertical portion from one side. And a second flange portion having an outer diameter larger than the through-hole and being detachably attached to the body portion so as to abut on the vertical portion from the other side. The handrail for a bathtub according to claim 8, wherein the handrail is rotatably attached to the main body frame by being provided. The torque transmitting means,
A transmission unit synchronized with the rotation of the handle knob and having a torque transmission surface orthogonal to a rotation axis of the handle knob;
A transmission portion having a torque transmission surface synchronized with the rotation of the nut portion and abutting on the torque transmission surface; and the torque transmission surface and the torque transmission surface are respectively provided. When the transmitted rotational power is less than a predetermined value, the torque transmitting surface and the torque transmitting surface are locked to each other, and when the transmitted rotational power is equal to or more than a predetermined value, the torque transmitting surface and the torque transmitting surface The handrail for a bathtub according to any one of claims 8 to 10, further comprising a concave portion or a convex portion having an inclined surface that causes slippage between the handrail and the torque transmitting surface.   The torque transmitting unit may be configured such that the transmitting unit or the transmitting unit is movably mounted in a rotation axis direction of the handle knob, and the movably mounted transmitting unit faces the transmitting unit. Transmission section urging means for urging toward the transmission section, or transmission section urging means for urging the movably mounted transmission section toward the transmission section facing the transmission section. The handrail for a bathtub according to claim 11, comprising: The torque transmitting means,
A circumference transmitting portion having a substantially cylindrical torque transmitting circumferential surface synchronized with the rotation of the handle knob and parallel to the rotation axis of the handle knob;
A sliding portion synchronized with the rotation of the nut portion and having a sliding surface that is slidably contacted with the torque transmitting circumferential surface; and
A keyway parallel to the rotation axis of the nut portion and disposed on the sliding surface;
A key that has a torque transmitting surface that is in contact with the torque transmitting circumferential surface and is arranged in the key groove so as to be movable in a radial direction with respect to a rotation axis of the nut portion; and Urging means for urging the torque transmitting surface of the key toward the torque transmitting circumferential surface of the handle knob, and wherein the torque transmitting circumferential surface and the torque transmitting surface are respectively: When the transmitted rotational power is less than a predetermined value, the torque transmitting circumferential surface and the torque transmitting surface are locked to each other. The handrail for a bathtub according to any one of claims 8 to 10, comprising a concave portion or a convex portion provided with an inclined surface that causes a slip between a surface and the torque transmitting surface. .   The handrail for a bathtub according to any one of claims 1 to 13, wherein the contact portion is an integral part of the body frame.   The handrail for a bathtub according to any one of claims 1 to 13, wherein the contact portion is a separate product from the main body frame, and is attached to the main body frame.

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