JP6095555B2 - Latch device - Google Patents

Description

  The present invention relates to an improvement of a latch device used for restricting the movement of a movable body caused by the action of vibration of a predetermined magnitude.

  As a latch tool used to limit the movement of the movable body caused by the action of vibration of a predetermined magnitude, there is one disclosed in Patent Document 1.

  The latch device includes a latch body attached to a fixed body that supports the movable body, and a latch receiver attached to the movable body. The latch body includes a spherical weight and an arm that has one end that is pressed against the spherical weight by the movement of the spherical weight, and that is assembled to rotate the other end side by the pressing. . At the tip of the arm, there is provided a hooking portion that can be engaged with the latch receiver along with the rotation, and with respect to the hooking portion of the arm that is rotated so as to be engageable with the latch receiver, the movable side The latch receiver is engaged when the member is moved by the vibration.

  In such a latching tool, the shaft of the arm is formed between the hook portion of the arm and the portion that comes into contact with the spherical weight. Further, the portion that is in contact with the spherical weight is positioned below the shaft. This is a setting for increasing the amount of rotation of the hook portion of the arm. That is, unless the vertical distance between the shaft and the portion where the spherical weight is in contact with the arm is large to some extent, a large amount of rotation of the hook portion of the arm around the shaft cannot be secured. If the amount of rotation of the hooking portion is not large, the hooking portion of the arm will not engage with the latch receiver even if the mounting position of the latch receiver with respect to the movable body is slightly shifted from the predetermined position. For this reason, in such a latch device, there is a limit in minimizing the vertical distance between the shaft of the arm and the portion where the spherical weight abuts. It was difficult to convert.

Japanese Patent No. 2957151

  The main problem to be solved by the present invention is that this type of latch device can be constructed as compactly as possible without impairing its function.

In order to achieve the above object, in the present invention, the latch device is a latch device that restricts the movement of the movable body due to the action of vibration of a predetermined magnitude,
A latch receiver provided on the movable body side and a latch body provided on the fixed body side,
The latch body includes an arm body and a support body thereof,
The arm body has an engaging portion for the latch receiver in front of the shaft portion,
The support body has a guide portion of the shaft portion of the arm body,
By this guide portion, the arm body moves forward and in the height direction from the reference position where the engaging portion is not engaged with the engaged portion of the latch receiver when the vibration is applied, and the engaging portion moves in the height direction. It is assumed that the portion is guided to an engagement position for engaging the portion with the engaged portion.

  The guide portion enables the arm body to be positioned at the reference position before the action of the vibration. On the other hand, when the vibration is applied, the arm body is guided by the guide portion, moves forward and moves in the height direction, and reaches the engagement position. The amount of movement of the engaging portion can be obtained by adding the amount of movement in the height direction of the entire arm body to the rotation about the shaft portion, thus ensuring a large height dimension of the support body. Even without this, the engaging portion of the arm body can be moved greatly in the height direction. Second, at the reference position, the engagement portion side of the arm body can be prevented from protruding greatly from the support body, and the latch body is installed on the fixed body side in such a manner that the appearance of the stationary body side is not impaired as much as possible. can do.

  A rolling body that rolls when the vibration is applied and presses a contact portion formed behind the shaft portion of the arm body is placed in the support body, and the arm body is moved to the engagement position by this pressing. It is one of the preferred embodiments of the present invention to move to the position. In this case, the forward movement of the arm body at the reference position can be started with high sensitivity by the pressing of the rolling elements.

  Moreover, it is preferable that the guide portion includes a rear portion that supports the shaft portion of the arm body at the reference position, and a front portion that has a height different from that of the rear portion. This is one of the embodiments.

  In addition, by moving the movable body to the fixed body side from the state in which the engaging portion of the arm body is engaged with the engaged portion of the latch receiver, the engagement is released and the arm body is One preferred embodiment of the present invention is to return to the reference position.

  In addition, it is a preferable aspect of the present invention that the arm body is bent so that the upper side is bent outward at the shaft portion position.

  In addition, it is a preferable aspect of the present invention that the center of gravity of the arm body is positioned behind the shaft portion.

  According to the present invention, this type of latch device, particularly the latch main body constituting the latch device, can be configured as compact as possible without impairing its function.

FIG. 1 is a perspective view of a latch device according to an embodiment of the present invention. FIG. 2 is a perspective view of the latch device, showing a state in which the lid of the latch body is removed. FIG. 3 is an exploded perspective view of the latch device. FIG. 4 is an exploded perspective view of the latch device, and shows the components constituting the latch device with the lower side of FIG. 3 facing upward. FIG. 5 is a cross-sectional view of the latch device, showing a state where the arm body is at the reference position. FIG. 6 is a cross-sectional view of the latch device, showing a state in which a predetermined amount of vibration acts from the state of FIG. 5 to move the rolling element forward and the arm body to the engagement position. . FIG. 7 is a cross-sectional view of the latch device, in which the movable body moves away from the fixed body from the state of FIG. 6, and the arm body and the latch receiver are engaged to prevent further movement of the movable body. Shows the state. FIG. 8 is a cross-sectional view of the latch device, and shows a state in which the movable body starts to move toward the fixed body from the state of FIG. FIG. 9 is a cross-sectional view of the latch device, showing a state in which the movable body is further moved in the direction approaching the fixed body from the state of FIG. FIG. 10 is a cross-sectional view of the latch device, and shows a state of the movable body that is further moved from the state of FIG. 9 toward the fixed body.

  A typical embodiment of the present invention will be described below with reference to FIGS. The latch device according to this embodiment is used to restrict the movement of the movable body M caused by the vibration of a predetermined magnitude. Typically, such a latch device is provided in furniture and fixtures as the fixed body S, and is used to prevent these movable parts as the movable body M, such as doors, from being opened during an earthquake.

  Such a latch device includes a latch receiver P provided on the movable body M side, and a latch body A provided on the fixed body S side that movably supports the movable body M.

  The latch receiver P is an engaged portion that is engaged when an engaging portion 7c of an arm body 7 (to be described later) constituting the latch body A moves as described later when the arm body 7 is acted upon by the vibration. 5a. The movement of the movable body M is limited by the engagement between the engaging portion 7c and the engaged portion 5a. In the example shown in the drawing, when the movable body M is moved in a direction away from the fixed body S by the action of the vibration from the state before the movable body M is in the closest position to the fixed body S (FIG. 5), The arm body 7 located at the reference position moves forward and downward (FIG. 6), and the engaging portion 7c formed at the free end 7d of the arm body 7 becomes the engaged portion 5a of the latch receiver P. It is designed to be engaged. Accordingly, in the illustrated example, the movement of the movable body M due to the vibration is stopped at a position slightly away from the fixed body S (FIG. 7). In the illustrated example, when the movable body M is moved to the position before the movable body M is moved from the state where the movable body M is stopped by the engagement, the arm body 7 is moved backward, moved upward, and moved backward. The engaged portion 7c and the engaged portion 5a are disengaged at the cut-off position (FIGS. 8 to 10). When this engagement is released, the arm body 7 moves its free end 7d upward to return to the reference position before the vibration action (FIG. 5). Thereby, after the action of the vibration, for example, after the earthquake stops, the engagement as the movable body M is released by operating the movable body M, for example, the door as the movable body M that closes the opening of the storage body as the fixed body S. It is possible to return smoothly to a state where can be opened. Although illustration is omitted, by changing the configuration of the guide portion 80 described later, the arm body 7 moves forward and moves upward when the vibration is applied, and the latch receiver P and the latch body A are engaged. It is also possible to configure it.

  In the illustrated example, the latch receiver P has a bottom portion 1, a rear side portion 2, a right side portion 3, a left side portion 4 and a front side portion 5, and has a box shape with an open upper surface. The rear side portion 2 includes a left end located outside the left side portion 4 and a right end located outside the right side portion 3. In the illustrated example, a through hole 2a of a shaft-like fixing member (not shown) such as a screw is formed at the left end and the right end of the rear side portion 2, and the latch receiver P uses the through hole 2a to form the shaft shape. The fixed member is fixed to the movable body M by driving it into the movable body M. Further, in the illustrated example, the front side portion 5 is notched at a middle position in the left-right direction and is divided into left and right. The front side portion 5 has its upper end curved toward the rear side portion 2 and has a bowl shape in a side view.

  In the illustrated example, the front side portion 5 functions as the engaged portion 5a. In the illustrated example, the arm body 7 has the free end 7d formed by integrally connecting one end of an arm main body 7 'to be described later to an intermediate part of a shaft-like body that is long in the left-right direction. At the reference position before the action of the vibration, the free end 7d of the arm body 7 is located above the latch receiver P and positioned on the rear side 2 side with respect to the engaged portion 5a (FIG. 5). ). At the time of the action of the vibration, the free end 7d of the arm body 7 moves downward and enters into the latch receiver P using the cut-out portion of the front side portion 5 (FIG. 6 / engagement position). When the movable body M moves due to the vibration, the shaft-like body is caught by the engaged portion 5a (FIG. 7). That is, in the illustrated example, such a shaft-like body functions as the engaging portion 7c.

  In the illustrated example, at the bottom 1 of the latch receiver P, behind the cut-out portion 5b of the front side portion 5, there is an interval at which the engaging portion 7c can be held between the front side portion 5 and the front side portion 5. The engagement protrusion 6 is formed by opening. The engaging protrusions 6 communicate with the two first grooves 1a and 1a extending in the front-rear direction passing through the bottom portion 1 and the groove front ends of the first grooves 1a and 1a. It is formed at the front end of the elastically deformable portion 1c divided by the groove 1b. When the movable body M moves away from the fixed body S from the state where the free end 7d of the arm body 7 enters the latch receiver P by the action of the vibration (FIG. 6 / engagement position), The free end 7d of the arm body 7 abuts from the rear. Due to this contact, the elastically deformable portion 1 c is bent downward, and the free end 7 d of the arm body 7 gets over the engaging protrusion 6. When the free end 7d of the arm body 7 gets over the engaging projection 6, the elastically deformable portion 1c is elastically restored, and the engaging portion 7c constituting the free end 7d of the arm body 7 is engaged with the engaging projection 6 and the engaged portion. 5a (FIG. 7). Thereby, when the movable body M is moved from the state where the movable body M is stopped by the engagement to the position before the movable body M is moved, the arm body 7 is moved backward and moved upward. When the movable body M is further moved from the state in which the arm body 7 has been moved rearward (FIG. 9) toward the position before the movable body 7 is moved, the engaging portion 7c of the arm body 7 is interposed via the engaging protrusion 6. Since the elastically deformable portion 1c is bent downward, the engaging portion 7c is pulled out behind the engaging protrusion 6, and the engaging portion 7c and the engaged portion 5a are disengaged (FIG. 10). Since the center of gravity of the arm body 7 is located behind the shaft portion as will be described later, when the engagement is released, the arm body 7 positions the free end 7d above the latch receiver P. Return to the previous reference position (FIG. 5).

  On the other hand, the latch body A includes an arm body 7 and a support body 8.

  The arm body 7 has an engaging portion 7c for the latch receiver P in front of the shaft portion 7a. In the illustrated example, the arm body 7 includes the shaft portion 7a between one end of an arm main body 7 'elongated in the front-rear direction as the free end 7d and the free end 7d between the other end opposite to the free end 7d. Yes. The shaft portion 7a includes a columnar protrusion 7b protruding rightward from the right side of the arm main body 7 'and a columnar protrusion 7b protruding leftward from the left side of the arm main body 7'. Further, the other end of the arm main body 7 ′ is integrally connected to an intermediate portion of a rod-like body 7 e that is long in the left-right direction. The arm body 7 has a center of gravity positioned behind the shaft portion 7a including the rod-like body 7e. Further, a contact portion 7f described later is formed behind the shaft portion 7a by the rod-like body 7e. The arm body 7 is bent so that the upper side is bent outward at the position of the shaft portion 7a. In the illustrated example, the distance between the shaft portion 7a of the arm body 7 and the free end 7d is larger than the distance between the shaft portion 7a and the contact portion 7f. At the same time, an imaginary straight line L1 connecting the free end 7d of the arm body 7 and the shaft portion 7a is 180 degrees downward at a position of the imaginary straight line L2 connecting the shaft portion 7a and the contact portion 7f. They intersect so as to form an angle d smaller than the angle (FIG. 3), and the upper surface of the arm body 7 has a contour following these straight lines. Thereby, as described later, the movable body M is moved to the position before the movement from the state where the engaging portion 7c of the arm body 7 and the engaged portion 5a of the latch receiver P are engaged (FIG. 7). When the body 7 is moved back to the reference position (FIGS. 8 and 9), there is no problem even if the inner surface of the lid 82 described later is positioned substantially horizontally.

  The support 8 has a guide portion 80 of the shaft portion 7 a of the arm body 7. The guide body 80 causes the arm body 7 to move forward from a reference position (FIG. 5) where the engaging portion 7c is not engaged with the engaged portion 5a of the latch receiver P when the vibration is applied. By moving in the height direction, the engaging portion 7c is guided to an engaging position (FIG. 6) where the engaging portion 7c can be engaged with the engaged portion 5a.

  The support body 8 has a case 81 whose upper part and front part are opened, and a part located on the front side of the shaft part 7a of the arm body 7 from the front part where the case 81 is opened. A lid 82 is provided to be combined with the case 81 so as to close the opened upper portion of the case 81 from a state in which the portion located on the rear side of the shaft portion 7a is accommodated in the case 81.

  The case 81 includes a central chamber 811, a front chamber 812, and a rear chamber 813. The front chamber 812 communicates the open portion of the front portion of the case 81 with the middle position of the central chamber 811 in the left-right direction. The left and right dimensions of the front chamber 812 are set to hold the formation position of the shaft portion 7 a of the arm body 7. The left and right dimensions of the central chamber 811 are larger than the left and right dimensions of the front chamber 812, and the contact portion 7f of the arm body 7 is set in the central chamber 811. The rear chamber 813 is configured to gradually reduce the left and right dimensions toward the rear portion 814 of the case 81. The bottom surface of the rear chamber 813 is positioned above the bottom surface of the central chamber 811, and a step 815 is formed between them.

  The lid 82 includes a first portion 821 that covers the front chamber 812 of the case 81, and a second portion 822 that blocks the center chamber 811 and the rear chamber 813 of the case 81. At the front end of the first part 821, arm portions 821a extending downward are formed on the left and right sides, respectively. Also, an arm portion 822 a extending downward is formed at the rear end of the second portion 822. In the example shown in the figure, the locking portions 821b and 822b formed on these arm portions 821a and 822a are locked to the locked portion 816 formed on the case 81 side, so that the case 82 can be attached to the case 82 with one touch. It can be assembled.

  In the illustrated example, the guide portion 80 is configured by a front chamber 812 of the case 81 and a part of the first portion 821 of the lid 82. In this embodiment, the guide portion 80 includes a rear portion 80a that supports the shaft portion 7a of the arm body 7 at the reference position, and a front portion 80b that differs in height from the rear portion 80a. I have.

  The guide portions 80 are formed on the left and right sides of the front chamber 812, respectively. The right guide portion 80 guides the right columnar projection 7b constituting the shaft portion 7a of the arm body 7, and the left guide portion 80 constitutes the left columnar projection 7b constituting the shaft portion 7a of the arm body 7. Is to guide you.

  The left and right guide portions 80 have the same configuration. In the illustrated example, the rear portion 80a is located above the front portion 80b. In the illustrated example, the rear portion 80a and the front portion 80b are each substantially horizontal surfaces. A lower inclined surface 80c is formed between the front end of the rear portion 80a and the rear end of the front portion 80b. The first portion 821 of the lid 82 has an interval to allow the cylindrical protruding portion 7b to be loosely spaced between the lower inclined surface 80c in a state where the lid 82 is assembled to the case 81 as described above. An upper inclined surface 821c facing the side inclined surface 80c is formed. A wall portion 80d is formed at each of the front end of the front portion 80b and the rear end of the rear portion 80a, and the shaft portion 7a of the arm body 7 is held in the guide portion 80 by the wall portion 80d. Yes.

  In the illustrated example, the support body 8 is a shaft-like fixing member that is applied to the fixing body S through a through hole 817a of a shaft-like fixing member (not shown) provided in the bracket portions 817 provided on the left and right sides of the front chamber 812 of the case 81, respectively. Can be attached to the fixed body S. Typically, when the fixed body S is a cupboard body, the support 8 is attached to the inner surface of the top plate at the opening side, and when the movable body M is the door, the latch receiver P is the upper part of the door. It is attached to the inner surface of the side.

  By the guide portion 80, the arm body 7 can be positioned at the reference position before the action of the vibration. On the other hand, when the vibration is applied, the arm body 7 is guided by the guide portion 80 and moves forward and moves in the height direction to reach the engagement position. The amount of movement of the engaging portion 7c of the body 7 can be obtained by adding the amount of movement in the height direction of the entire arm body 7 to the rotation about the shaft portion 7a. Even if a large height dimension is not ensured, the engaging portion 7c of the arm body 7 can be moved greatly in the height direction. Second, at the reference position, the engagement portion 7c side of the arm body 7 can be prevented from protruding greatly from the support body 8, and the external appearance of the latch body A on the fixed body S side is not impaired as much as possible. Thus, it can be installed on the fixed body S side.

  In the illustrated example, at the reference position, the shaft portion 7a of the arm body 7 is located at the rear portion 80a of the guide portion 80, and the center of gravity of the arm body 7 is located behind the shaft portion 7a. The arm body 7 has a posture in which the upper surface in front of the shaft portion 7a is in contact with the inner surface of the lid 82 and is positioned substantially horizontally (FIG. 5). When the vibration is applied, the shaft portion 7a of the arm body 7 moves forward, and at the same time, guided by the lower inclined surface 80c and the upper inclined surface 821c, the arm body 7 moves downward as a whole, and the guide portion 80 to the front portion 80b. At this time, the lower surface of the position behind the shaft portion 7a of the arm body 7 hits the bottom surface of the central chamber 811 of the case 81, and the arm body 7 is engaged with the engaging portion 7c around the shaft portion 7a with the contact portion as a power point. Is rotated in a direction to move the sword downward. By this rotation, the arm body 7 reaches the engagement position (FIG. 6). When the movable body M is moved to a position before the movable body M is moved from the state where the engaging portion 7c of the arm body 7 and the engaged portion 5a of the latch receiver P are engaged (FIG. 7), the lower slope of the guide portion 80 is obtained. By guiding the surface 80c, the upper inclined surface 821c, and the inner surface of the lid 82, the arm body 7 moves upward while being moved rearward, and brings the shaft portion 7a to the rear portion 80a (FIG. 9). When the movable body M is further moved in a direction approaching the fixed body S from the state in which the shaft portion 7a of the arm body 7 reaches the rear portion 80a, the engagement portion 7c and the engaged portion 5a are moved as described above. Since the engagement is disengaged and a space is created between the position behind the shaft portion 7a of the arm body 7 and the bottom surface of the central chamber 811 of the case 81, the arm body 7 is positioned behind the shaft portion 7a. The lower surface of the portion is rotated to a position where it abuts against the bottom surface of the central chamber 811, and the engaging portion 7c moves upward to return to the state before the action of the vibration (FIG. 5).

  In this embodiment, the abutting portion 7f formed behind the shaft portion 7a of the arm body 7 is pressed into the support body 8 when the vibration is applied. A rolling element 9 is accommodated, and the arm body 7 is moved to the engagement position by this pressing.

  In the illustrated example, the rolling element 9 is configured as a sphere. Such rolling elements 9 are typically made of metal. At the reference position, the rolling element 9 is positioned in the rear chamber 813 with its lower end in contact with the bottom surface of the rear chamber 813 of the case 81 (FIG. 5). When the vibration is applied, the rolling element 9 moves forward, falls from above the step 815, enters the central chamber 811 and comes into contact with and presses the contact portion 7f of the arm body 7 (FIG. 6). In this embodiment, the forward movement of the arm body 7 at the reference position is started with high sensitivity by the pressing of the rolling elements 9. The rolling element 9 is guided only by the guide portion 823 formed on the side surface of the case 81 constituting the rear chamber 813 and the inner surface of the lid 82 when the vibration is applied, and is moved only forward. . When the movable body M is moved to a position before the movable body M is moved from the state where the engaging portion 7c of the arm body 7 and the engaged portion 5a of the latch receiver P are engaged (FIG. 7), the arm body 7 is moved backward. The rolling element 9 is returned to the rear chamber 813 by being pushed by the contact portion 7f (FIGS. 8 to 9). The abutment portion 7f of the arm body 7 has an up-and-down direction middle position as a top portion 7g, and the upper and lower sides thereof are inclined to gradually reduce the vertical dimension of the abutment portion 7f toward the top portion 7g. The rolling elements 9 falling into the central chamber 811 are pushed back to the rear chamber 813 by the lower inclined surface 7h of the contact portion 7f (FIGS. 8 and 9).

  Of course, the present invention is not limited to the embodiments described above, but includes all embodiments that can achieve the object of the present invention.

M movable body S fixed body P latch receiver A latch main body 5a engaged portion 7 arm body 7a shaft portion 7c engaging portion 8 support body 80 guide portion

Claims (6)

A latch device that restricts movement of a movable body due to a vibration of a predetermined magnitude,
A latch receiver provided on the movable body side and a latch body provided on the fixed body side,
The latch body includes an arm body and a support body thereof,
The arm body has an engaging portion for the latch receiver in front of the shaft portion,
The support body has a guide portion of the shaft portion of the arm body,
By this guide portion, the arm body moves forward and in the height direction from the reference position where the engaging portion is not engaged with the engaged portion of the latch receiver when the vibration is applied, and the engaging portion moves in the height direction. A latch device adapted to be guided to an engagement position for engaging a portion with the engaged portion.   A rolling body that rolls when the vibration is applied and presses a contact portion formed rearward of the shaft portion of the arm body is housed in the support body. The latch device according to claim 1, wherein the latch device is adapted to move to an engagement position.   The said guide part is provided with the rear part which supports the axial part of the said arm body in the said reference position, and the front part which makes this rear part and height differ. Latch device.   When the movable body is moved to the fixed body side from the state in which the engaging portion of the arm body is engaged with the engaged portion of the latch receiver, the engagement is released and the arm body is moved to the reference position. The latch device according to any one of claims 1 to 3, wherein the latch device is adapted to be restored to (1).   5. The latch device according to claim 1, wherein the arm body is bent so that the upper side is bent outward at the position of the shaft portion. 6.   The latch device according to any one of claims 1 to 5, wherein the arm body has a center of gravity located behind the shaft portion.

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