Locking devices and fittings

Abstract

To prevent a situation in which an engagement state and a non-engagement state are carelessly switched regardless of the posture of a lock device when installing the same.SOLUTION: An operating member 62 is movable between a non-operating position and an operating position with respect to an operating unit body 61 fixed to a door frame 14, and the operating unit body 61 has a concave portion 61a capable of accommodating the operating member 62 placed at the non-operating position. By restricting the movement of the operating member 62 to the operating position when the same is housed in a recess 61a, a hook member 50 and a lock pin 40 are maintained in an engagement state, a rotation restricting member 100 having an elastic piece portion 102 provided with a locking protrusion 103 is attached to the operating unit body 61, and a locking hole portion 91b is provided in a transmission lever 91. When the operating member 62 is placed at the operating position, the locking protrusion 103 and the locking hole portion 91b engage with each other with the biasing force of the elastic piece portion 102, so that the non-engagement state between the hook member 50 and the lock pin 40 is maintained.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a locking device and fitting that controls the opening and closing movement of a sliding screen relative to a frame. [Background technology]

[0002] In one such locking device, for example, a first locking member is disposed on the vertical frame of the frame so as to be movable 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). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-104947 A Summary of the Invention [Problem to be solved by the invention]

[0004] 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 its movement relative to the operating unit body is restricted. Therefore, when the first locking member is engaged with the second locking member, it is possible to maintain the screen closed against the frame without causing the first locking member to move downward inadvertently.

[0005] Here, this type of locking device may be attached to a fixture in an upside-down position (hereinafter referred to as an inverted position) due to limitations in mounting space, etc. For example, in the locking device described in Patent Document 1, when it is attached in the illustrated position (hereinafter referred to as an upright position), mounting space for the operating member is required in a portion lower than 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 mounting the operating member in a portion lower than the lower end of the transmission member. Therefore, in a situation 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.

[0006] However, when the locking device is attached to the 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, the first locking member may move 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 occur because the first locking member is disposed on the frame material, but may occur in the same way if the first locking member is disposed on the frame material and moves downward inadvertently. Also, the upright position and the inverted position are specified merely for convenience of explanation, and the above-mentioned problems may occur regardless of the mounting position.

[0007] In view of the above-mentioned circumstances, the present invention aims to provide a locking device and fittings that can prevent an inadvertent change between an engaged state and a disengaged state, regardless of the posture at the time of installation. [Means for solving the problem]

[0008] In order to achieve the above object, the locking device of the present invention includes 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, and 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 restricting the 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. Against This locking device allows the opening and closing movement of the shoji screen, and is 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 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 rail material is restricted. Effect of the Invention

[0009] According to the present 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 with respect to the second locking member. [Brief description of the drawings]

[0010] [Figure 1] 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. [Diagram 2] This shows the main parts of the fitting shown in Figure 1, where (a) is a cross-sectional view of the shoji screen when it is closed, and (b) is a cross-sectional view of the shoji screen when it is open. [Diagram 3] FIG. 2 is an exploded perspective view of a locking device applied to the fitting shown in FIG. [Figure 4]4A and 4B are diagrams showing the locking device shown in FIG. 3 as viewed from the inner peripheral side, in which (a) shows the engaged state and (b) shows the non-engaged state. [Diagram 5] 4A and 4B show 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 when placed in a non-operating position, and (c) is a perspective view of the operating member when placed in an operating position. [Figure 6] 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. [Figure 7] 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. [Figure 8] 8 is an enlarged view showing a main part of the locking device shown in FIG. 7. [Figure 9] 1 shows a main part of a locking device according to a second embodiment of the present invention, in which (a) is a perspective 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. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] A preferred embodiment of the locking device and fittings according to the present invention will be described in detail below with reference to the attached drawings. For convenience, the terms "visible direction" and "visible direction" will be used below. The "visible direction" is the direction along the depth of the fittings, as shown by arrow A in the figure. A surface along the visible direction may be called a "visible surface." The "visible direction" is the direction along the top and bottom perpendicular to the visible 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 direction along the horizontal direction perpendicular to the visible direction is called the "visible direction." A surface along the visible direction may be called a "visible surface."

[0012] (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 so as to be openable and closable relative to the frame 10. The frame 10 is constructed by framing an upper frame 11, a lower frame 12, and left and right vertical frames 13, 14 on all four sides. The screen 20 is constructed by attaching an upper frame 22, a lower frame 23, and left and right vertical frames 24, 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 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. By operating the operator handle 30 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, 14 that make up the frame body 10 and the frames 22, 23, 24, 25 that make up 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 Fig. 2, the door end frame 14 has a rectangular cylindrical vertical frame base 14a and a flat plate-like visible wall portion 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 visible surface 25a located on the outer periphery of the door end frame 25 faces the visible wall portion 14b, and the visible surface 25b facing the room faces the vertical frame base 14a.

[0013] In this fitting, a locking device is provided in 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 in the door end frame 14 of the frame body 10. In this embodiment 1, two lock pins 40 are provided at the top and bottom of the door end frame 25, and two hook members 50 are provided at the top and bottom of the door end frame 14. 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 in the position when attached to the fitting.

[0014] The lock pin 40 comprises 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 viewing direction.

[0015] As shown in Figs. 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-operating element) 70, and can move along the longitudinal direction of the door frame 14. In the first embodiment, a flat hook member 50 having a support portion 51, a hook base portion 52, an interlocking portion 53, and a linking portion 54 is applied. The support portion 51 extends along the longitudinal direction of the door frame 14, and has a crimping hole 51a at each of the upper and lower ends. The hook base portion 52 extends from the upper end portion of the support portion 51 toward the outside of the room. The interlocking portion 53 extends downward from the extended end portion of the hook base portion 52, and forms an interlocking groove 55 that opens downward between the support portion 51 and the hook base portion 52. The dimension along the longitudinal direction of the interlocking portion 53 is shorter than that of the support portion 51, and is approximately 1 / 2 in the first embodiment. The edge of the lower end of the interlocking portion 53 close to the support portion 51 is inclined downward so as to gradually move away from the support portion 51. The linking portion 54 extends upward from the middle portion of the hook base 52 and then bends toward the room, and forms a linking groove 56 between the hook base 52 and the linking portion 54 that opens toward the room side.

[0016] The guide member 70 has a rectangular shape whose vertical dimension is larger than that 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 a mounting hole 72 and guide grooves 73, 74 at the upper and lower parts of the insertion recess 71. The mounting 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 in the upper part of the guide member 70 extends along the longitudinal direction of the door end frame 14. The guide groove 74 provided in the lower part of the guide member 70 has a lower end located on an extension of the upper guide groove 73, and is gradually inclined toward the outside of the room as it goes upward. As is clear from the figure, the lower guide groove 74 has a rib 74a provided on the opening edge, and the dimension along the plate thickness direction of the opening inner peripheral surface is larger than that of the upper guide groove 73. Also, the guide member 70 is provided with a cover member (non-operating element) 80 so as to cover the portion provided 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 is provided with 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.

[0017] The two guide members 70 are attached to the frame body 10 together with the cover members 80 by overlapping the cover members 80 on their respective surfaces and screwing mounting screws (not shown) into the door frame 14 through the cover mounting holes 81 and mounting holes 72. The positions at which the guide members 70 are attached are set so that when the shoji screen 20 is closed relative to the frame body 10, the pin bodies 42 of the lock pins 40 are simultaneously inserted into the respective insertion recesses 71.

[0018] The above-mentioned hook members 50 are supported on the door frame 14 in a state where they cover 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, 74 of the guide member 70. Furthermore, in the first embodiment, 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 extending vertically and 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.

[0019] When one of the hook members 50 supported by the guide member 70 as described above, 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 part 51 is located at the lower end of the upper guide groove 73 and the lower end of the lower guide groove 74, so that the support part 51 is disposed in a position along the length of the door frame 14, and the opening of the insertion recess 71 formed in the guide member 70 is closed by the meshing part 53 (meshed state).

[0020] 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 to the uppermost position, it is in the state shown in FIG. 4(b). That is, the guide pins 57 screwed into the support parts 51 of both the upper and lower hook members 50 are located at the upper ends of the guide grooves 73 and 74, so that the meshing parts 53 are located above the insertion recess 71, and the opening of the insertion recess 71 is in an open state (non-mesh state). Furthermore, as described above, the guide groove 74 provided below the guide member 70 is inclined so that it gradually faces the outside of the room as it moves upward. 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.

[0021] As shown in Figs. 1 to 6, the lock operation unit (mesh maintaining 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 side 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 having a size that allows it to be accommodated in the recess 61a of the operating unit main body 61, and a support shaft portion 62b tiltably connected to one end of the handle portion 62a, and is attached to the operating unit main body 61 by mounting the support shaft portion 62b on the bearing portion 61b of the operating unit main body 61.

[0022] The operating member 62 can be moved between a state in which the operating member 62 is housed in the operating unit body 61 (non-operating position) and a state in which the operating member 62 protrudes from the operating unit 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 body 61, the rotation of the operating member 62 relative to the operating unit body 61 is restricted. On the other hand, when the handle portion 62a protrudes from the operating unit 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 of the present 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 body 61 to maintain the state, and is released from the engagement state with the handle portion 62a when pressed, and is provided with 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 main body 61 against the spring force of the handle spring, the handle portion 62a is again engaged with the engaging claw, so that the handle portion 62a can be accommodated in the recess 61a of the operating unit main body 61.

[0023] A transmission lever (transmission member: operating system element) 91 is attached to the end of the support shaft portion 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 portion 62b and is attached to the support shaft portion 62b in a state in which relative rotation with the support shaft portion 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 portion of the vertical frame base portion 14a facing the outside of the room, and is linked to the lower hook member 50 by arranging a link pin 91a provided on the protruding end in the link groove 56. Note that the transmission lever 91 does not necessarily need 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 interlocking member 90.

[0024] 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 main 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 disposed 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 main 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 disposed at the highest position relative to the guide member 70.

[0025] 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 the present embodiment 1, a rotation restricting member 100 is disposed on the bearing portion 61b of the operating portion main body 61, and a locking hole portion 91b is provided on the transmission lever 91. In the drawings, dots are applied to clarify the rotation restricting member 100. The rotation restricting member 100 has a ring portion 101 fitted on the exterior of the bearing portion 61b, an elastic piece portion 102 extending outward from an outer periphery of the ring portion 101 close to the transmission lever 91, and an locking protrusion portion 103 provided on the surface of the elastic piece portion (biasing member) 102 corresponding to the transmission lever 91, and is integrally molded from an elastic member such as resin. In the illustrated example, two elastic piece portions 102 are provided on the outer periphery of the annular portion 101, and abutment portion 61c is provided so as to protrude from a portion above the bearing portion 61b on the back surface of the operation portion main body 61, and this abutment portion 61c is disposed between the elastic piece portions 102 to prevent relative rotation of the rotation restricting member 100 with respect to the operation portion main body 61. The locking hole portion 91b is formed in the transmission lever 91 at a position facing the elastic piece portion 102 of the rotation restricting member 100 and at a position where it fits into the locking projection 103 of the rotation restricting member 100 when the hook member 50 is disposed at the uppermost position relative to the guide member 70.

[0026] In the fittings configured as described above, when the locking device is in the state shown in FIG. 4(b), when the door frame 20 is closed relative to the frame 10, the pin body 42 of the lock pin 40 provided on the door end frame 14 is accommodated 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 door frame 20 is not positioned in a completely closed position relative to the frame 10, the hook member 50 moving downward moves the door frame 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 door frame 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 maintains the shoji screen 20 in a closed state relative to the frame body 10. Moreover, according to the fitting of the first embodiment, 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.

[0027] 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 to the uppermost position by operating the handle portion 62a, the locking projection 103 of the rotation restriction member 100 is fitted into 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 downward inadvertently due to gravity. As a result, even when the screen 20 is closed again on the frame body 10, there is no risk of collision between the meshing portion 53 of the hook member 50 and 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 restricting 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.

[0028] 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 portion main body 61, thereby preventing the hook member 50 from moving downward inadvertently.

[0029] In the above-described 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 portion main body 61. However, the present invention is not necessarily limited to this. For example, as shown in the modified example shown in Figs. 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 portion 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 cover the opening of the accommodation hole 61d at all times 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.

[0030] Even in this modification, 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 accidentally moving upward, and keeps the screen 20 closed relative to the frame 10.

[0031] 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, the spring force of the coil spring 111 presses the small locking ball 112 against the locking hole 91b of the transmission lever 91, as shown in FIG. 7(c). 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 small locking 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 screen 20 closed.

[0032] In the above-described embodiment and modified example, an engagement maintaining mechanism is provided between the operation unit main body 61 and the operation member 62, and a non-engagement maintaining mechanism is provided between the operation 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, a non-engagement maintaining mechanism can be provided between the guide pin 57 provided on the hook member 50 and the guide member 70.

[0033] (Embodiment 2) FIG. 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 main 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 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.

[0034] 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 accidentally moving upward, and maintains the screen 20 closed relative to the frame 10.

[0035] 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 disposed 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.

[0036] In the above-mentioned first embodiment, the modified example, and the second embodiment, a vertical sliding window is exemplified as an application target of the locking device, but it can be applied to other fittings as long as the shoji 20 is arranged to be openable and closable relative to the frame 10. In addition, in the locking device having 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 given of a device having two sets of hook members and lock pins, it may be one set, or three or more sets. 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 linearly slidable operating member.

[0037] As described above, the locking device according to the present invention comprises a first locking member movably arranged 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 arranged 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, and 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 restricting 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. Against This locking device allows the opening and closing movement of the shoji screen, and is 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 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 rail 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 with respect to the second locking member.

[0038] 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.

[0039] The present invention also provides a locking device as described above, wherein the operating member moves between a non-operating position and an operating position relative to an operating unit body fixed to the frame material or the frame member, and the engagement maintaining mechanism and the operating unit body are provided between the motion system element including the operating member and the operating unit body. Non-meshing retention mechanism and the other of the meshing maintaining mechanism and the non-meshing maintaining mechanism is provided between the non-motion system elements and the motion system elements excluding the operating unit main body. 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] The present invention also relates to a fixture equipped 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. [Explanation of symbols]

[0044] 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 meshing portion, 54 linking portion, 55 meshing groove, 56 linking groove, 57 guide pin, 60 lock operation portion, 61 operation portion body, 61a recess, 61b bearing portion, 61c abutment portion, 61d accommodation 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 Circular ring portion, 102 elastic piece portion, 103 locking projection portion, 111 coil spring, 112 locking small ball, 120 protrusion portion, 121 notch, 122 elastic partition portion

Claims

1. 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 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.

2. 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.

3. 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.

4. 4. The locking device according to claim 2, wherein the operating unit main body has a recess in which the operating member can be accommodated when the operating member is disposed in a non-operating position, and when the operating member is accommodated in the recess, movement of the operating member to the operating position is restricted, thereby maintaining the engaged state or the non-engaged state.

5. The locking device according to claim 2 or 3, characterized in that 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 state or a non-engaged state.

6. A fitting, characterized in that the locking device according to any one of claims 1 to 5 is provided on a vertical frame constituting a frame body and on a vertical stile constituting a shoji screen.

7. 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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