JP7597641B2 - Locking devices and fittings - Google Patents

Description

The present invention relates to a locking device and fittings that control the opening and closing movement of a sliding screen relative to a frame.

One example of this type of locking device is one in which a first locking member is disposed on the vertical frame of the frame so that it can move up and down, and a second locking member is fixed to the vertical frame that constitutes the shoji screen. The first locking member is linked to an operating member provided on the vertical frame by a transmission member. In this locking device, when the operating member is operated, the first locking member moves via the transmission member and is switched between an engaged state and a disengaged state with respect to the second locking member, making it possible to control the opening and closing movement of the shoji screen relative to the frame (see, for example, Patent Document 1).

JP 2018-104947 A

In the above-mentioned locking device, when the first locking member moves upward against gravity, it engages with the second locking member. At this time, the operating member is housed in a recess in the operating unit body fixed to the vertical frame, and is in a non-operating position where movement relative to the operating unit body is restricted. Therefore, when it is engaged with the second locking member, the first locking member will not inadvertently move downward, and it is possible to maintain the screen closed against the frame.

However, due to limitations in mounting space, etc., this type of locking device may be attached to the fixture in an upside-down position (hereinafter referred to as the inverted position). For example, in the locking device described in Patent Document 1, when it is attached in the illustrated position (hereinafter referred to as the upright position), mounting space for the operating member is required below the lower end of the transmission member. In contrast, if the locking device is attached in an inverted position, there is no need to secure mounting space for the operating member below the lower end of the transmission member. Therefore, in situations where mounting space cannot be secured below the transmission member, by attaching the locking device in an inverted position, it becomes possible to control the opening and closing movement of the shoji screen with the same operation as in the upright position.

However, when the locking device is attached to a fixture in an inverted position, if the operating member is placed in the operating position to open the screen and then the operating member is released, there is a risk that the first locking member will transition into an engaged state due to its own weight. For this reason, for example, if the screen is closed in this state, problems such as the first locking member colliding with the second locking member may occur. Note that this problem does not arise due to the first locking member being disposed on the frame material, but could similarly arise if the first locking member were disposed on the frame material and moved downward inadvertently. Also, the upright position and inverted position are specified merely for convenience of explanation, and the above-mentioned problems can occur regardless of the mounting position.

In view of the above, the present invention aims to provide a locking device and fittings that can prevent accidental switching between an engaged state and an unengaged state, regardless of the installation position.

In order to achieve the above-mentioned object, the locking device of the present invention comprises a first locking member movably arranged on either the frame material constituting a frame body or the frame material constituting a screen along the length of the frame material or the frame material, a second locking member fixed to the other of the frame material or the frame material, an operating member movably arranged on the frame material or the frame material, and a transmission member that switches the first locking member between an engaged state and a disengaged state with respect to the second locking member by transmitting the movement of the operating member to the first locking member, and the locking device restricts the opening and closing movement of the screen relative to the frame body when the first locking member is in an engaged state with the second locking member, while allowing the opening and closing movement of the screen relative to the frame body when the first locking member is in a disengaged state with respect to the second locking member, and is characterized in that an engagement maintaining mechanism that maintains the engaged state and a disengagement maintaining mechanism that maintains the disengaged state are provided between an operating element that is linked when the operating member is moved and a non-operating element whose relative movement with respect to the frame material or the frame material is restricted.

According to the present invention, since an engagement maintaining mechanism and a non-engagement maintaining mechanism are provided, there is no risk of the first locking member accidentally switching between an engaged state and a non-engaged state relative to the second locking member.

1 is a perspective view of a door in an open state in a fitting to which a locking device according to an embodiment of the present invention is applied, as viewed from the outside of the room. FIG. 2A and 2B show the main parts of the fitting shown in FIG. 1, in which (a) is a cross-sectional view of the door when it is closed, and (b) is a cross-sectional view of the door when it is open. FIG. 2 is an exploded perspective view of a locking device applied to the fitting shown in FIG. 1 . 4A and 4B are diagrams showing the locking device shown in FIG. 3 as viewed from the inner peripheral side, in which FIG. 4A shows an engaged state and FIG. 4B shows a disengaged state. 4A shows an operating member, an operating unit main body, and a transmission lever of the locking device shown in FIG. 3, in which (a) is an exploded perspective view, (b) is a perspective view of the operating member in a state where it is placed in a non-operating position, and (c) is a perspective view of the operating member in a state where it is placed in an operating position. 4 is a diagram showing an operating member, an operating portion main body, and a transmission lever of the locking device shown in FIG. 3. 1A shows an operating member, an operating unit main body, and a transmission lever of a modified locking device, in which (a) is an exploded oblique view, (b) is an oblique view of the operating member in a non-operating position, and (c) is an oblique view of the operating member in an operating position. 8 is an enlarged view showing a main part of the locking device shown in FIG. 7 . 1 shows the main parts of a locking device according to a second embodiment of the present invention, in which (a) is an oblique view of a guide member for guiding the movement of a hook member which is a first locking member, (b) is a diagram showing a state in which the hook member is arranged in an interlocking state with respect to the guide member, and (c) is a diagram showing a state in which the hook member is arranged in a non-interlocking state with respect to the guide member.

Below, a preferred embodiment of the locking device and fittings according to the present invention will be described in detail with reference to the attached drawings. For convenience, the terms "prospect direction" and "finding direction" will be used below. The prospect direction is the direction along the depth of the fittings, as shown by arrow A in the figure. A surface along the prospect direction may be referred to as a "prospect surface." The prospect direction is the direction along the top and bottom perpendicular to the prospect direction in the case of an object that extends along the horizontal direction, such as a bottom frame. In the case of an object that extends along the vertical direction, such as a vertical frame, the horizontal direction perpendicular to the prospect direction is called the "finding direction." A surface along the prospect direction may be called a "finding surface."

(Embodiment 1)
FIG. 1 shows a fitting to which a locking device according to a first embodiment of the present invention is applied. The fitting shown here is called a vertical sliding window, and includes a frame 10 and a screen 20 that is arranged to be openable and closable relative to the frame 10. The frame 10 is formed by framing an upper frame 11, a lower frame 12, and left and right vertical frames 13 and 14 on all four sides. The screen 20 is formed by attaching an upper frame 22, a lower frame 23, and left and right vertical frames 24 and 25 to the four sides of a rectangular panel 21. Although not shown in the figure, link mechanisms called friction stays are provided between the upper frame 11 and the upper frame 22 and between the lower frame 12 and the lower frame 23, and an operator handle 30 is provided on the part of the lower frame 23 that faces the interior of the room. In this fitting, the friction stays are operated appropriately by operating the operator handle 30, and the screen 20 rotates around an axis along the vertical direction, so that the screen 20 opens with one vertical frame (hereinafter referred to as the door end frame 25) protruding toward the outside of the room. If the operator handle 30 is operated in the opposite direction, the door end frame 25 is positioned opposite the corresponding vertical frame of the frame body 10 (hereinafter referred to as the door end frame 14), and the screen 20 closes relative to the frame body 10. The frames 11, 12, 13, and 14 constituting the frame body 10 and the frames 22, 23, 24, and 25 constituting the screen 20 may be made of metal such as aluminum alloy or extruded resin, or may be a composite type of metal extruded material and resin extruded material. As shown in Figure 2, the door end frame 14 has a rectangular cylindrical vertical frame base 14a and a flat plate-like projection wall 14b extending from the outer peripheral edge of the vertical frame base 14a on the outside of the room toward the outside. When the shoji screen 20 is closed, the projection surface 25a located on the outer periphery of the door end frame 25 faces the projection wall 14b, and the projection surface 25b facing the room faces the vertical frame base 14a.

This fitting has a locking device in which a lock pin (second locking member: non-operating element) 40 is provided on the door end frame 25 of the shoji screen 20, and a hook member (first locking member: operating element) 50 and a lock operation unit 60 are provided on the door end frame 14 of the frame body 10. In this embodiment 1, two lock pins 40 are provided on the door end frame 25, one above and one below, and two hook members 50 are provided on the door end frame 14, one above and one below. The lock operation unit 60 is the only one provided on the door end frame 14. The configuration of the locking device will be described in detail below, but the directions of the components such as the lock pin 40, lock operation unit 60, and hook member 50 will be specified based on the position when they are attached to the fitting.

The lock pin 40 is comprised of a pin base 41 in the shape of a roughly rectangular plate and a cylindrical pin body 42 erected from approximately the center of the pin base 41. The pin body 42 is fixed to the visible surface 25a of the door frame 25 via the pin base 41 with the pin body 42 extending in the visible direction.

As shown in Figures 1 to 4, the hook member 50 is attached to the front surface of the front wall portion 14b of the door frame 14 facing the door frame stile 25 via a guide member (non-moving element) 70, and can move along the length of the door frame 14. In this embodiment 1, a flat hook member 50 having a support portion 51, a hook base portion 52, an engagement portion 53, and a linking portion 54 is applied. The support portion 51 extends along the length of the door frame 14 and has crimping holes 51a at both the upper and lower ends. The hook base portion 52 extends from the upper end of the support portion 51 toward the outside of the room. The engagement portion 53 extends downward from the extended end of the hook base portion 52, and forms an engagement groove 55 that opens downward between the support portion 51 and the hook base portion 52. The dimension along the length of the engagement portion 53 is shorter than that of the support portion 51, and is approximately 1/2 in embodiment 1. The edge of the lower end of the interlocking portion 53 that is close to the support portion 51 is inclined downward so as to gradually move away from the support portion 51. The interlocking portion 54 extends upward from the middle of the hook base 52 and then bends toward the room, forming an interlocking groove 56 between the hook base 52 and the interlocking portion 54 that opens toward the room.

The guide member 70 has a rectangular shape whose vertical dimensions are larger than those of the hook member 50, and has an insertion recess 71 that opens toward the outside of the room at approximately the middle of the height direction. The guide member 70 has an attachment hole 72 and guide grooves 73, 74 at the upper and lower parts of the insertion recess 71. The attachment hole 72 is a through hole formed in the edge of the guide member 70 that faces the outside of the room. The guide grooves 73, 74 are formed in the edge of the guide member 70 that faces the inside of the room and extend in a straight line. The guide groove 73 provided above the guide member 70 extends along the length of the door frame 14. The guide groove 74 provided below the guide member 70 has a lower end located on an extension of the upper guide groove 73, and is gradually inclined so that it faces the outside of the room as it goes up. As is clear from the figure, the lower guide groove 74 has a rib 74a on the opening edge and is larger in dimension along the plate thickness direction of the opening inner periphery than the upper guide groove 73. In addition, the guide member 70 is provided with a cover member (non-operating element) 80 to cover the portion with the two mounting holes 72, the portion located on the interior side of the insertion recess 71, and the portion located below the insertion recess 71. The cover member 80 has cover mounting holes 81 in the portions corresponding to the mounting holes 72, and a cover guide groove 82 in the portion corresponding to the lower guide groove 74.

The two guide members 70 are attached to the frame body 10 together with the cover member 80 by overlapping the cover member 80 on the surface of each guide member 70 and screwing mounting screws (not shown) into the door frame 14 through the cover mounting holes 81 and mounting holes 72. The position at which the guide members 70 are attached is set so that when the shoji screen 20 is closed against the frame body 10, the pin bodies 42 of the lock pins 40 are simultaneously inserted into the respective insertion recesses 71.

The above-mentioned hook member 50 is supported on the door frame 14 in a state where it covers the surface of the guide member 70 by crimping the guide pins 57 into the crimping holes 51a of the support part 51 through the guide grooves 73 and 74 of the guide member 70. Furthermore, in this embodiment 1, the upper hook member 50 and the lower hook member 50 are linked by an interlocking member (operation system element) 90. The interlocking member 90 is a thin plate member that extends vertically and is disposed between the door frame 14 and the guide member 70, and connects the two hook members 50 by the guide pins 57 provided at the top of each hook member 50.

When one of the hook members 50 supported by the guide member 70 in the above manner, for example the lower hook member 50, is moved downward, the upper hook member 50 also moves downward via the interlocking member 90. When the hook member 50 is moved all the way down, as shown in FIG. 4(a), the guide pin 57 screwed into the support portion 51 is positioned at the lower end of the upper guide groove 73 and the lower end of the lower guide groove 74, so that the support portion 51 is positioned along the length of the door frame 14, and the opening of the insertion recess 71 formed in the guide member 70 is blocked by the meshing portion 53 (meshed state).

On the other hand, when the lower hook member 50 is moved upward, the upper hook member 50 also moves upward via the interlocking member 90, and when the hook member 50 is moved all the way up, it is in the state shown in FIG. 4(b). That is, the upper and lower hook members 50 have the guide pins 57 screwed into the support parts 51 located at the upper ends of the guide grooves 73 and 74, so that the meshing parts 53 are located above the insertion recesses 71, and the opening of the insertion recesses 71 is in an open state (non-mesh state). Furthermore, as described above, the guide grooves 74 provided below the guide member 70 are gradually inclined upward so as to face the outside of the room. As a result, when the hook member 50 is placed in a non-mesh state, it is inclined so that the upper end of the support part 51 faces the inside of the room.

As shown in Figures 1 to 6, the lock operation unit (mesh maintenance mechanism) 60 is configured with an operation unit main body (non-operating element) 61 and an operation member 62, and is fixed to the vertical frame base 14a of the door end frame 14 via the operation unit main body 61. The operation unit main body 61 extends along the length of the door end frame 14 and is a rectangular box shape with one side open, and is disposed inside the vertical frame base 14a with a recess 61a opening on one side open to the outside from a projection surface located on the inner periphery of the vertical frame base 14a. A cylindrical bearing portion 61b is provided so as to pass through the lower end of the recess 61a of the operation unit main body 61. The operating member 62 has a handle portion 62a that is large enough to be accommodated in the recess 61a of the operating unit body 61, and a support shaft portion 62b that is tiltably connected to one end of the handle portion 62a, and is attached to the operating unit body 61 by mounting the support shaft portion 62b to the bearing portion 61b of the operating unit body 61.

The operating member 62 can be moved between a state in which it is housed in the operating unit main body 61 (non-operating position) and a state in which it protrudes from the operating unit main body 61 (operating position) by tilting the handle portion 62a relative to the support shaft portion 62b. When the handle portion 62a is housed in the operating unit main body 61, the rotation of the operating member 62 relative to the operating unit main body 61 is restricted. On the other hand, when the handle portion 62a protrudes from the operating unit main body 61, the operating member 62 can be rotated around the axis of the support shaft portion 62b. Although not shown in the figure, the lock operating unit 60 in this embodiment 1 is provided with an engagement claw that engages with the handle portion 62a when the handle portion 62a is housed in the operating unit main body 61 to maintain the state, while being released from the engagement state with the handle portion 62a when pressed, and a handle spring that urges the handle portion 62a to the protruding state when the engagement state with the engagement claw is released. When the handle portion 62a is accommodated in the operating unit body 61 against the spring force of the handle spring, the handle portion 62a is again engaged with the engagement claw, so that the handle portion 62a can be accommodated in the recess 61a of the operating unit body 61.

A transmission lever (transmission member: operating system element) 91 is attached to the end of the support shaft 62b of the operating member 62 that penetrates the bearing portion 61b. The transmission lever 91 extends along the radial direction of the support shaft 62b and is attached to the support shaft 62b in a state where relative rotation with the support shaft 62b is prevented. The extended end of the transmission lever 91 protrudes to the outside of the operating base through a notch (not shown) formed in the part of the vertical frame base 14a facing the outside of the room, and is linked to the lower hook member 50 by placing the link pin 91a provided on the protruding end in the link groove 56. Note that the transmission lever 91 does not necessarily have to be linked to the lower hook member 50, and may be linked to the link groove 56 of the upper hook member 50, or may be configured to be linked to the link member 90.

In the first embodiment, as shown in FIG. 4(a), when the handle portion 62a of the operating member 62 is housed in the operating unit body 61, the transmission lever 91 extends gradually downward from the support shaft portion 62b toward the outside of the room, and the hook member 50 is positioned at the lowest position relative to the guide member 70. On the other hand, as shown in FIG. 4(b), when the support shaft portion 62b is rotated counterclockwise with the handle portion 62a of the operating member 62 protruding from the operating unit body 61, the transmission lever 91 extends gradually upward from the support shaft portion 62b toward the outside of the room, and the hook member 50 is positioned at the highest position relative to the guide member 70.

The locking device described above is provided with a non-engagement maintaining mechanism. The non-engagement maintaining mechanism is for maintaining the hook member 50 in a non-engaged state. In this embodiment 1, a rotation restricting member 100 is disposed on the bearing portion 61b of the operating unit main body 61, and a locking hole portion 91b is provided on the transmission lever 91. In the illustration, dots are applied for the purpose of clarifying the rotation restricting member 100. The rotation restricting member 100 has a ring portion 101 that is exteriorly mounted on the bearing portion 61b, an elastic piece portion 102 that extends outward from the outer periphery of the ring portion 101 that is close to the transmission lever 91, and an engagement protrusion portion 103 that is provided on the surface of the elastic piece portion (biasing member) 102 that corresponds to the transmission lever 91, and is integrally molded from an elastic material such as resin. In the illustrated example, two elastic pieces 102 are provided on the outer periphery of the annular portion 101, and abutment portions 61c are provided to protrude from the rear surface of the operating unit body 61 above the bearing portions 61b, and these abutment portions 61c are disposed between the elastic pieces 102 to prevent the rotation restriction member 100 from rotating relative to the operating unit body 61. The locking hole portion 91b is formed in a position that faces the elastic piece portion 102 of the rotation restriction member 100 in the transmission lever 91 and fits into the locking protrusion 103 of the rotation restriction member 100 when the hook member 50 is positioned at the uppermost position relative to the guide member 70.

In the fittings configured as described above, when the locking device is in the state shown in FIG. 4(b), when the shoji 20 is closed relative to the frame body 10, the pin body 42 of the lock pin 40 provided on the door end frame 14 is housed in the insertion recess 71 of the guide member 70. When the handle portion 62a of the operating member 62 is rotated clockwise from this state, the hook member 50 moves downward, as shown in FIG. 4(a), so that the pin body 42 is placed in the meshing groove 55, and the opening of the insertion recess 71 is blocked by the meshing portion 53. At this time, even if the shoji 20 is not positioned in a completely closed position relative to the frame body 10, the hook member 50 moving downward moves the shoji 20 in the closing direction due to the action of the inclined surface provided at the tip of the meshing portion 53, and the opening of the insertion recess 71 is blocked by the meshing portion 53 when the shoji 20 is positioned in a completely closed position. When the opening of the insertion recess 71 is closed by the meshing portion 53, even if the shoji screen 20 is moved in the opening direction, the pin body 42 abuts against the meshing portion 53 of the hook member 50, preventing the shoji screen 20 from moving in the opening direction. If the handle portion 62a is accommodated in the recess 61a of the operating unit main body 61 from this state, the handle portion 62a is prevented from rotating relative to the operating unit main body 61. This prevents the hook member 50 from moving upward inadvertently, and keeps the shoji screen 20 closed relative to the frame body 10. Moreover, according to the fitting of this embodiment 1, since the handle portion 62a is accommodated in the recess 61a of the operating unit main body 61 provided in the vertical frame base 14a, it is difficult to see the handle portion 62a from the inside of the room, which is advantageous in terms of appearance quality.

On the other hand, when the handle portion 62a is projected from the operating portion main body 61 and rotated counterclockwise, the hook member 50 moves upward together with the interlocking member 90, and the opening of the insertion recess 71 provided in the guide member 70 is opened. Therefore, it is possible to disengage the pin body 42 from the insertion recess 71 of the guide member 70, and the screen 20 can be opened relative to the frame body 10. At this time, in the above-mentioned locking device, when the hook member 50 is moved all the way upward by operating the handle portion 62a, the locking protrusion 103 of the rotation restriction member 100 is engaged with the locking hole portion 91b provided in the transmission lever 91, and this state is maintained by the elastic force of the elastic piece portion 102. Therefore, there is no risk of the hook member 50 and the interlocking member 90 moving inadvertently downward due to gravity. As a result, even when the screen 20 is closed again against the frame 10, there is no risk of the meshing portion 53 of the hook member 50 colliding with the pin body 42 of the lock pin 40. After that, by applying an operating force to the handle portion 62a that is capable of disengaging the locking projection 103 of the rotation restriction member 100 from the locking hole portion 91b of the transmission lever 91 against the elastic force of the elastic piece portion 102, it becomes possible to rotate the handle portion 62a relative to the operating unit main body 61. Therefore, by rotating the handle portion 62a clockwise and then storing it in the recess 61a of the operating unit main body 61, it becomes possible to move the hook member 50 downward and maintain the screen 20 in a closed state.

In the above embodiment, the locking device is disposed on the fixture so that the hook member 50 is disengaged when it moves upward, but the illustrated locking device may be installed on the fixture upside down. In this case, the hook member 50 is engaged when it moves upward, and the handle portion 62a is accommodated in the recess 61a of the operating unit main body 61, thereby preventing the hook member 50 from moving downward inadvertently.

In the above embodiment, the elastic force of the rotation restriction member 100 molded from resin is used to fit the locking protrusion 103 into the locking hole 91b of the transmission lever 91 to maintain the non-engagement state when the handle portion 62a protrudes from the recess 61a of the operation unit main body 61, but the present invention is not necessarily limited to this. For example, as shown in the modified example in Figures 7 and 8, a coil spring (biasing member) 111 and a locking small ball 112 molded from a hard material are accommodated in the accommodation hole 61d provided in the operation unit main body 61, and the locking small ball 112 is pressed against the locking hole 91b of the transmission lever 91 to maintain the non-engagement state. The base end of the transmission lever 91 is formed with a large diameter so as to always cover the opening of the accommodation hole 61d regardless of the rotation position. The lock device of the modified example differs from that of the first embodiment only in the non-engagement maintenance mechanism, and the other configurations may be the same as those of the first embodiment.

Even in this modified example, when the handle portion 62a of the operating member 62 is rotated clockwise to move the hook member 50 downward, as shown in FIG. 7(b), the handle portion 62a is accommodated in the recess 61a of the operating unit body 61, thereby preventing the handle portion 62a from rotating relative to the operating unit body 61. This prevents the hook member 50 from inadvertently moving upward, and keeps the screen 20 closed relative to the frame 10.

On the other hand, when the hook member 50 is moved upward by protruding the handle portion 62a from the operating unit main body 61 and rotating it counterclockwise, as shown in FIG. 7(c), the spring force of the coil spring 111 presses the locking small ball 112 against the locking hole 91b provided in the transmission lever 91. Therefore, there is no risk of the hook member 50 and the interlocking member 90 moving downward inadvertently due to gravity. After that, if an operating force capable of disengaging the locking small ball 112 from the locking hole 91b of the transmission lever 91 against the spring force of the coil spring 111 is applied to the handle portion 62a, it becomes possible to rotate the handle portion 62a relative to the operating unit main body 61. Therefore, by rotating the handle portion 62a clockwise and then storing it in the recess 61a of the operating unit main body 61, the hook member 50 can be moved downward to keep the shoji screen 20 closed.

In the above-described embodiment and modified example, an engagement maintaining mechanism is provided between the operating unit main body 61 and the operating member 62, and a non-engagement maintaining mechanism is provided between the operating unit main body 61 and the transmission lever 91, but this is not necessarily limited to this. For example, as in the second embodiment described below, it is also possible to provide a non-engagement maintaining mechanism between the guide pin 57 provided on the hook member 50 and the guide member 70.

(Embodiment 2)
9 shows a guide member and a hook member applied to a locking device according to a second embodiment of the present invention. The locking device illustrated here controls the opening and closing movement of the screen 20 relative to the frame 10 of a vertical sliding window, as in the first embodiment, and differs from the first embodiment only in the configuration of the non-engagement maintaining mechanism. That is, in the locking device according to the second embodiment, the non-engagement maintaining mechanism between the operating unit body 61 and the transmission lever 91 is omitted, while a protrusion 120 is provided so as to protrude into the guide groove 73 located above the two guide members 70. The protrusion 120 is configured by forming a notch 121 adjacent to the guide groove 73 to form a narrow elastic partition piece (biasing member) 122 between the guide groove 73 and the notch 121, and by curving a part of the elastic partition piece 122 so as to protrude into the guide groove 73. The width of the guide groove 73 where the protrusion 120 is provided is configured to be slightly narrower than the guide pin 57, and the guide pin 57 can pass through by elastically deforming the elastic partition piece 122. The position where the protrusion 120 is provided is set so that the hook member 50 can abut against the lower part of the guide pin 57 when the hook member 50 is positioned at the uppermost position relative to the guide member 70. The above-mentioned protrusion 120 may be provided on each of the two guide members 70, or may be provided on only one of the guide members 70. When the protrusion 120 is provided on each of the two guide members 70, there is an advantage that the number of parts to be handled does not increase. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals.

Even in the second embodiment configured as described above, when the handle portion 62a of the operating member 62 is rotated clockwise to move the hook member 50 downward, as shown in FIG. 9(b), the handle portion 62a is accommodated in the recess 61a of the operating unit body 61, thereby preventing the handle portion 62a from rotating relative to the operating unit body 61. This prevents the hook member 50 from inadvertently moving upward, and keeps the screen 20 closed relative to the frame 10.

On the other hand, when the hook member 50 is moved upward by projecting the handle portion 62a from the operating unit main body 61 and rotating it counterclockwise, as shown in FIG. 9(c), the guide pin 57 is positioned above the protruding portion 120, so that the downward movement of the guide pin 57 is restricted by the protruding portion 120. Therefore, there is no risk of the hook member 50 and the interlocking member 90 moving downward inadvertently due to gravity. After that, if an operating force capable of moving the guide pin 57 downward against the elastic force of the elastic partition wall portion is applied to the handle portion 62a, it becomes possible to rotate the handle portion 62a relative to the operating unit main body 61. Therefore, by rotating the handle portion 62a clockwise and then storing it in the recess 61a of the operating unit main body 61, the hook member 50 can be moved downward to keep the shoji screen 20 closed.

In the above-mentioned first embodiment, modified example, and second embodiment, a vertical sliding window is exemplified as an application of the locking device, but it can be applied to other fittings as long as the shoji screen 20 is arranged so that it can be opened and closed relative to the frame 10. In addition, in the locking device equipped with a hook member and a lock pin, the hook member is configured to be movable, but it is also possible to configure the lock pin to be movable. Furthermore, although an example is shown in which two sets of hook members and lock pins are provided, one set or three or more sets may be used. In this case, it is not necessary to provide an interlocking member, and it is also possible to provide an operating member for each set of hook members and lock pins. Furthermore, although an operating member that is rotated is exemplified, the moving direction of the operating member is not limited to this, and it may be, for example, a member that slides linearly.

As described above, the locking device of the present invention comprises a first locking member movably arranged on either the frame material constituting a frame body or the frame material constituting a screen along the longitudinal direction of the frame material or the frame material, a second locking member fixed to the other of the frame material or the frame material, an operating member movably arranged on the frame material or the frame material, and a transmission member that switches the first locking member between an engaged state and a disengaged state with respect to the second locking member by transmitting the movement of the operating member to the first locking member, and is a locking device that restricts the opening and closing movement of the screen relative to the frame body when the first locking member is in an engaged state with the second locking member, while allowing the opening and closing movement of the screen relative to the frame body when the first locking member is in a disengaged state with respect to the second locking member, and is characterized in that an engagement maintaining mechanism for maintaining the engaged state and a disengagement maintaining mechanism for maintaining the disengaged state are provided between an operating element that is linked when the operating member is moved and a non-operating element whose relative movement with respect to the frame material or the frame material is restricted.
According to this invention, since an engagement maintaining mechanism and a disengagement maintaining mechanism are provided, there is no risk of the first locking member accidentally switching between an engaged state and a disengaged state relative to the second locking member.

Furthermore, the present invention is characterized in that, in the above-mentioned locking device, the operating member moves between a non-operating position and an operating position relative to an operating unit main body fixed to the frame material or the sill material, and the engagement maintaining mechanism and the non-engagement maintaining mechanism are provided between the operating system element including the operating member and the operating unit main body.
According to this invention, for example, when a plurality of sets of first locking members and second locking members are operated by a single operating member, the engagement maintaining mechanism and the disengagement maintaining mechanism can be provided together in the operating portion main body.

The present invention is also characterized in that, in the above-mentioned locking device, the operating member moves between a non-operating position and an operating position relative to an operating unit main body fixed to the frame material or the frame material, and either the engagement maintaining mechanism or the non-engagement maintaining mechanism is provided between the operating system elements including the operating member and the operating unit main body, and the other of the engagement maintaining mechanism or the non-engagement maintaining mechanism is provided between the non-operating system elements excluding the operating unit main body and the operating system elements.
According to this invention, when a plurality of sets of first locking members and second locking members are provided, a plurality of either the engagement maintaining mechanisms or the non-engagement maintaining mechanisms is also provided, which is advantageous in terms of reliability.

Furthermore, the present invention is characterized in that, in the above-mentioned locking device, the operating unit main body has a recess in which the operating member can be accommodated when the operating member is placed in a non-operating position, and when the operating member is accommodated in the recess, the movement of the operating member to the operating position is restricted, thereby maintaining the engaged or non-engaged state.
According to this invention, by accommodating the operating member in the recess of the operating portion body, the engaged or disengaged state is maintained, making operation easy.

The present invention is also characterized in that, in the above-mentioned locking device, when the operating member is placed in the operating position, the operating system element and the non-operating system element are engaged with each other by the biasing force of a biasing member, thereby maintaining an engaged or non-engaged state.
According to this invention, when releasing the meshed or non-meshed state, it is only necessary to apply an operating force to the operating member that resists the biasing force of the biasing member, and no special operation is required, which is advantageous in terms of operability.

Furthermore, the fitting according to the present invention is characterized in that the above-mentioned locking device is provided on the vertical frame constituting the frame body and on the vertical stile constituting the shoji screen.
According to this invention, it is possible to prevent a situation in which the meshed state and the non-meshed state are inadvertently switched over due to the action of gravity.

The present invention also relates to a fixture provided with the above-mentioned locking device, wherein the operating member is the only one disposed on the vertical frame constituting the frame body via the operating unit main body, and the first locking members are arranged in parallel in the vertical direction so as to be movable along the longitudinal direction of the vertical frame, and the second locking members are fixed in parallel in the vertical direction to the vertical frames constituting the shoji screen, and the first locking members are connected to each other by interlocking members.
According to this invention, it is only necessary to operate a single operating member for a plurality of pairs of first locking members and second locking members, which is advantageous in terms of operability.

10 Frame body, 14 Door end frame, 20 Shoji screen, 25 Door end frame, 40 Lock pin, 41 Pin base, 42 Pin body, 50 Hook member, 51 Support portion, 51a Screw hole, 52 Hook base portion, 53 Interlocking portion, 54 Linking portion, 55 Interlocking groove, 56 Linking groove, 57 Guide pin, 60 Lock operation portion, 61 Operation portion body, 61a Recess, 61b Bearing portion, 61c Contact portion, 61d Storage hole, 62 Operation member, 62a Handle portion, 62b Support shaft portion, 70 Guide member, 71 Insertion recess, 72 Mounting hole, 73 Guide groove, 74 Guide groove, 80 Cover member, 90 Interlocking member, 91 Transmission lever, 91a Linking pin, 91b Locking hole portion, 100 Rotation restriction member, 101 ring portion, 102 elastic piece portion, 103 locking protrusion, 111 coil spring, 112 locking small ball, 120 protrusion, 121 notch, 122 elastic partition piece

Claims (7)

a first locking member movably disposed on either a frame material constituting a frame body or a stile material constituting a screen along the longitudinal direction of the frame material or the stile material, a second locking member fixed to the other of the frame material or the stile material, an operating member movably disposed on the frame material or the stile material, and a transmission member that switches the first locking member between an engaged state and a disengaged state with respect to the second locking member by transmitting the movement of the operating member to the first locking member, wherein a locking device restricts opening and closing movement of the screen relative to the frame body when the first locking member is in an engaged state with the second locking member, and allows opening and closing movement of the screen relative to the frame body when the first locking member is in a disengaged state with the second locking member,
A locking device characterized in that an engagement maintenance mechanism for maintaining an engaged state and a non-engagement maintenance mechanism for maintaining a non-engaged state are provided between an operating system element that is linked when the operating member is moved and a non-operating system element whose relative movement with respect to the frame material or the frame material is restricted. the operating member is movable between a non-operating position and an operating position with respect to an operating portion main body fixed to the frame material or the frame member,
2. The locking device according to claim 1, wherein the engagement maintaining mechanism and the non-engagement maintaining mechanism are provided between the operation system element including the operating member and the operation portion main body. the operating member is movable between a non-operating position and an operating position with respect to an operating portion main body fixed to the frame material or the frame member,
The locking device according to claim 1, characterized in that one of the engagement maintaining mechanism and the non-engagement maintaining mechanism is provided between the operating system element including the operating member and the operating unit main body, and the other of the engagement maintaining mechanism and the non-engagement maintaining mechanism is provided between the non-operating system element excluding the operating unit main body and the operating system element. The locking device according to claim 2 or 3, characterized in that the operating unit body has a recess in which the operating member can be accommodated when the operating member is placed in a non-operating position, and when the operating member is accommodated in the recess, the movement of the operating member to the operating position is restricted, thereby maintaining the engaged or non-engaged state. The locking device according to claim 2 or 3, characterized in that when the operating member is placed in the operating position, the operating element and the non-operating element are engaged with each other by the biasing force of a biasing member, thereby maintaining the engaged or non-engaged state. A fitting characterized in that the locking device described in any one of claims 1 to 5 is provided on the vertical frame that constitutes the frame body and the vertical frame that constitutes the shoji screen. A fitting provided with the locking device according to any one of claims 2 to 5,
The operation member is disposed on the vertical frame constituting the frame body via the operation unit main body, and a plurality of the first locking members are arranged in parallel in the vertical direction in a state in which the first locking members are movable along the longitudinal direction of the vertical frame,
The second locking members are fixed to the vertical frame of the door in a vertical direction.
A fixture characterized in that the first locking members are connected to each other by an interlocking member.

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