Fitting and latch locking apparatus

Abstract

To prevent a latch from accidentally moving into an inward tilting posture.SOLUTION: Disclosed is a fitting in which, by engaging a latch 30 provided at a top rail 22A of an inner sash 20A, the inner sash 20A is made slidable up and down relative to a frame body 10, and when the latch 30 is disengaged via an operation protruding part 32a, it is made movable into an inward tilting posture in which the top rail 22A of the inner sash 20A protrudes to an indoor side with a bottom rail 23A as the center. The inner sash 20A is provided with a locking apparatus 60 in which the latch 30 cannot be disengaged when in a locked state, and which remains locked unless a key 50 is not used to unlock it.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a fitting that allows a door screen to slide up and down relative to a frame by engaging a latch provided on the upper edge of the door screen, and that allows the upper edge of the door screen to move around the lower edge to an inward-tilted position in which it protrudes into the room when the latch is disengaged via an operating part, as well as a latch locking device applied to the fitting. [Background technology]

[0002] Among fittings in which a shoji screen can slide vertically relative to a frame, there is one that is configured so that the shoji screen on the indoor side can be moved to an inward-tilted position. For example, the shoji screen is supported so that it can slide vertically and rotate around its lower edge via a link mechanism provided between the vertical frame and the vertical stile. A latch that detachably engages with the vertical frame is provided at both ends of the upper edge of the shoji screen. When the latch is engaged with the vertical frame, the shoji screen can slide vertically while being maintained in a position along the vertical frame. On the other hand, when the latch is disengaged to release the engagement with the vertical frame, the upper edge can move around the lower edge to protrude into the indoor side, and the shoji screen can be placed in an inward-tilted position. When placed in an inward-tilted position, the surface of the shoji screen facing the outside of the room is exposed to the indoor side, which has the advantage of making it easier to clean (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-328655 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the above-mentioned latch is operated incorrectly, the screen may inadvertently move into an inward tilted position, which may cause problems such as interference with sliding.

[0005] In view of the above-mentioned circumstances, the present invention aims to provide a fitting and a latch locking device that can prevent a sliding screen from inadvertently moving into an inward tilted position. [Means for solving the problem]

[0006] In order to achieve the above-mentioned objective, the fittings of the present invention are fittings in which a latch provided on the upper edge of a shoji screen can be engaged to allow the shoji screen to slide up and down relative to a frame, and when the latch is disengaged via an operating part, the upper edge of the shoji screen can be moved around the lower edge to an inward-tilted position in which it protrudes into the room, the upper edge of the shoji screen being the center; the fittings are characterized in that the shoji screen is provided with a locking device which prevents the latch from being disengaged when the screen is in a locked state, and which maintains the screen in the locked state unless an unlocking operation is performed using a key.

[0007] In addition, the latch locking device of the present invention is a locking device for locking a latch that is provided on a shoji screen that can slide up and down relative to a frame body and can move to an inward-tilted position with its upper edge protruding into the room, centered on the lower edge, and that prevents the shoji screen from moving to the inward-tilted position when engaged with the frame body, but allows the screen screen to move to the inward-tilted position when disengaged via an operating unit, and is characterized by comprising a device main body that is attached to the shoji screen with the operating unit exposed to the outside, a locking member that is attached to the device main body with the operating unit exposed to the outside, and a locking mechanism that prevents the locking member from moving relative to the device main body when the locking member is attached to the device main body and in a locked state, but allows the locking member to move relative to the device main body when the locking member is attached to the device main body and in a locked state, but allows the locking member to move relative to the device main body when the locking member is operated to unlock with a key. Effect of the Invention

[0008] According to the present invention, the latch cannot be disengaged unless the locking device is unlocked with a key, thereby making it possible to prevent the screen from inadvertently moving into an inward tilted position relative to the frame. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing a fitting according to an embodiment of the present invention as viewed from the inside of a room. [Diagram 2] FIG. 2 is a perspective view of the fitting shown in FIG. 1 as seen from the inside of the room. [Diagram 3] FIG. 2 is a vertical cross-sectional view of the fitting shown in FIG. [Figure 4] FIG. 2 is a cross-sectional view of a main part of the fitting shown in FIG. [Diagram 5] 2 is a vertical cross-sectional view showing the state in which the shoji screen of the fitting shown in FIG. 1 is in an inward tilted position. [Figure 6] 2A and 2B show an opening limiting device applied to the fitting shown in FIG. 1, in which (a) is an exploded perspective view seen from the base plate side, and (b) is an exploded perspective view seen from the stopper member side. [Figure 7] 2 is a vertical cross-sectional view of the fitting shown in FIG. 1 in a state in which the upward movement of the door screen is restricted by an opening restriction device. FIG. [Figure 8] 2 is a vertical cross-sectional view of the fitting shown in FIG. 1 in a state where an opening limiting device is unlocked. [Figure 9] 2 is a vertical cross-sectional view of the fitting shown in FIG. 1 in a state where a locking device is unlocked by a key. [Figure 10] 2A and 2B show a locking device applied to the fitting shown in FIG. 1, in which FIG. 2A is an exploded perspective view seen from the lock cover side, and FIG. 2B is an exploded perspective view seen from the device main body side. [Figure 11] This shows the main parts of the fitting shown in Figure 1, where (a) is a cross-sectional view when the locking device is in the locked state, (b) is a cross-sectional view when the locking device is operated to unlock and move the locking member, and (c) is a cross-sectional view when the latch is disengaged from the state shown in (b). [Figure 12] 2A and 2B are schematic diagrams showing a locking device applied to the fitting shown in FIG. 1, in which (a) is a plan view when it is in a locked state, (b) is a plan view when it is unlocked, and (c) is a plan view when the locking member is moved from the state shown in (b). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a preferred embodiment of the fitting and the latch locking device according to the present invention will be described in detail with reference to the attached drawings. In the following, for convenience, the terms "prospect direction" and "finding direction" may be used. The "prospect direction" is the direction along the depth of the fitting, as shown by the arrow A in the figure. A surface along the prospect direction may be called a "prospect surface." The "prospect direction" is a 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 direction along the horizontal direction perpendicular to the prospect direction is called the "prospect direction." A surface along the prospect direction may be called a "prospect surface."

[0011] 1 to 4 show a fitting according to an embodiment of the present invention. The fitting shown here is called a sash window, which is equipped with a frame 10, an inner screen 20A arranged on the indoor side of the frame 10, and an outer screen 20B arranged on the outdoor side of the frame 10. The frame 10 is constructed by assembling an upper frame 11, a lower frame 12, and left and right vertical frames 13, 14 on all four sides. In the illustrated example, the frame 10 is constructed by welding the ends of the upper frame 11, the lower frame 12, and the vertical frames 13, 14 made of extruded material molded from resin. Although not shown in the figures, the frame 10 is attached to the frame B by providing a connecting member such as a nail or a screw to the frame B via the mounting fins 15 provided on the outer periphery of each frame. A frame 16 is provided on each of the indoor side portions of the frame 10. The picture frames 16 are made of thick, flat boards and are provided facing the room from the interior sides of the upper frame 11, the lower frame 12, and the vertical frames 13 and 14. The ends of these picture frames 16 are connected to each other.

[0012] The inner screen 20A is constructed by attaching an upper frame 22A, a lower frame 23A, and left and right vertical frames 24A, 25A to the four periphery of a rectangular panel 21A such as a double-glazed glass. Similarly, the outer screen 20B is constructed by attaching an upper frame 22B, a lower frame 23B, and left and right vertical frames 24B, 25B to the four periphery of a rectangular panel 21B such as a double-glazed glass. In the illustrated example, the upper frames 22A, 22B, the lower frames 23A, 23B, and the vertical frames 24A, 25A, 24B, 25B are made of extruded resin, as in the case of the frame 10, and the screens 20A, 20B are constructed by welding the ends of each other. These inner and outer screens 20A and 20B are configured such that when they are placed in the closed position, that is, when the bottom frame 23A of the inner screen 20A is abutted against the bottom frame 12 and the top frame 22B of the outer screen 20B is abutted against the top frame 11, the top frame 22A of the inner screen 20A and the bottom frame 23B of the outer screen 20B are arranged side by side in the forward direction and are sized to close the opening in the frame body 10.

[0013] The upper frame 22A of the inner screen 20A and the lower frame 23B of the outer screen 20B are provided with smoke deflectors 26A, 26B on the facing surfaces. The smoke deflectors 26A, 26B engage with each other when the inner screen 20A and the outer screen 20B are placed in the closed position, respectively, and function to prevent the upper frame 22A of the inner screen 20A and the lower frame 23B of the outer screen 20B from moving away from each other.

[0014] A crescent lock 27 is provided at approximately the center of the length of the upper frame 22A of the inner screen 20A. When the inner screen 20A and the outer screen 20B are locked in their closed positions, the crescent lock 27 engages with a crescent receiver (not shown) provided on the lower frame 23B of the outer screen 20B, thereby preventing the inner screen 20A and the outer screen 20B from sliding vertically.

[0015] In the fitting of this embodiment, the outer screen 20B is fixed to the frame body 10 in the above-mentioned closed position, while the inner screen 20A is supported so that it can slide up and down and can be tilted inward relative to the frame body 10. That is, the outer screen 20B is prevented from moving relative to the frame body 10 by providing connecting members (not shown) between the upper frame 22B and the upper frame 11 and between the vertical frames 24B, 25B and the vertical frames 13, 14, and is always placed in the closed position. In contrast, the inner screen 20A can slide the lower frame 23A up and down relative to the frame body 10 by the link mechanism 28 provided between the vertical frames 24A, 25A and the vertical frames 13, 14, and can rotate around the axis along the length of the lower frame 23A so that the upper frame 22A is in an inward tilted position protruding into the room.

[0016] In addition, latches 30 are provided at both ends of the upper frame 22A of the inner sash 20A. As shown in FIG. 4, the latch 30 is configured with a case 31 and an engagement member 32, and is configured to be symmetrical on the left and right. The case 31 has an operation guide groove 31a along the longitudinal direction of the upper frame 22A on its upper surface. The engagement member 32 has an operation protrusion (operation portion) 32a on its upper surface. This latch 30 is attached to the upper surface of the upper frame 22A via the case 31 with the operation protrusion 32a of the engagement member 32 slidably fitted into the operation guide groove 31a of the case 31, and the tip of the engagement member 32 can appear and disappear from the expected surface that is the outer periphery side of the vertical frames 24A and 25A. As is clear from the figure, the tip of the engagement member 32 is provided with a latch guide surface 32b and a regulating surface 32c. The latch guide surface 32b is provided on the edge of the engaging member 32 that faces the outside of the room, and is gradually inclined so as to face inward toward the outer periphery. The restricting surface 32c is provided on the edge of the engaging member 32 that faces the inside of the room, and is provided so as to be perpendicular to the projection direction. In addition, a coil spring 33 is provided between the case 31 and the engaging member 32 to constantly urge the engaging member 32 toward the outer periphery.

[0017] In the inner sash 20A equipped with the latch 30 described above, when the vertical frames 24A, 25A are in a position along the vertical frames 13, 14 (hereinafter referred to as the upright position) and the tip of the engagement member 32 protrudes from the visible surface of the vertical frames 24A, 25A, as shown in the left half of Figure 4, the regulating surface 32c of the engagement member 32 engages with the slide guides 13a, 14a provided on the vertical frames 13, 14. This prevents the upper frame 22A from moving toward the inside of the room relative to the frame body 10, and allows the inner sash 20A to slide up and down while maintaining the upright position relative to the frame body 10, as shown in Figure 3.

[0018] On the other hand, by moving the inner screen 20A slightly upward, the engagement state of the smoke deflectors 26A, 26B is released, and from this state, the engagement member 32 is operated (disengagement operation) via the operating protrusion 32a to move backward against the spring force of the coil spring 33, and the engagement state between the slide guides 13a, 14a of the vertical frames 13, 14 and the regulating surface 32c of the engagement member 32 is released as shown in the right half of Figure 4. Therefore, it becomes possible to move the upper frame 22A to the inside of the room around the axis along the longitudinal direction of the lower frame 23A, and the inner screen 20A can be placed in an inward tilted position as shown in Figure 5. In this state, the surface of the inner screen 20A facing the outside of the room is exposed to the inside of the room, which has the advantage of making cleaning easier.

[0019] When the upper frame 22A is rotated toward the outside of the room from the state in which the inner screen 20A is tilted inward, the inclination of the latch guide surface 32b that abuts against the vertical frames 13, 14 causes the engagement member 32 to move backward against the spring force of the coil spring 33, making it possible to return the inner screen 20A to an upright position. When the inner screen 20A is in an upright position, the spring force of the coil spring 33 causes the engagement member 32 to protrude, and the regulating surface 32c returns to a state in which it engages with the slide guides 13a, 14a of the vertical frames 13, 14.

[0020] Furthermore, the above-mentioned fitting is provided with an opening limiting device 40 on the vertical frame 13 located on the left side when viewed from the inside of the room, as shown in Fig. 1. The opening limiting device 40 is for limiting the upper limit position of the inner sash 20A relative to the frame body 10, and is indirectly provided on the frame B via the projected surface on the inner periphery of the vertical frame 13 and the projected surface on the inner periphery of the frame 16 provided on the vertical frame 13. In this embodiment, the opening limiting device 40 is configured with a base portion 41 and a stopper member 42, as shown in Fig. 6.

[0021] The base plate 41 has a vertically elongated rectangular thick plate shape, and is attached to the inner periphery of the vertical frame 13 and the inner periphery of the frame 16 on the inner side of the sliding area of ​​the inner screen 20A via one mounting surface. The sliding area of ​​the inner screen 20A is the area that becomes the movement trajectory of the inner screen 20A when the inner screen 20A slides up and down while maintaining an upright posture. The base plate 41 has a bearing hole 41a, a rotation guide groove 41b, and a key lock groove 41c on the surface. The bearing hole 41a is a circular recess in cross section provided on the upper side of the base plate 41 and in the corner that is the outer side of the room. The shaft mounting hole 41d is provided in the center of the bearing hole 41a so as to penetrate the base plate 41. The rotation guide groove 41b is an arc-shaped groove centered on the axis of the shaft mounting hole 41d, and is provided in the lower part of the base plate 41. An engagement wall 41e is provided at the opening edge of the rotation guide groove 41b in the half portion on the outside of the room. The engagement wall 41e is formed so as to protrude from the opening edge located on the center side of the rotation guide groove 41b toward the outer periphery and narrow the opening width of the rotation guide groove 41b. The key lock groove 41c is a through hole provided between the bearing hole 41a and the rotation guide groove 41b. In this embodiment, the key lock groove 41c is configured with an unlock groove 41f and a lock groove 41g. The unlock groove 41f is formed in an arc shape centered on the axis of the shaft mounting hole 41d and is formed so as to be coaxial with the rotation guide groove 41b. The lock groove 41g extends upward from the part located on the outside of the unlock groove 41f. The lock groove portion 41g has an arc shape centered on a portion located between the bearing hole 41a and the rotation guide groove 41b at the edge portion located on the indoor side of the base plate portion 41.

[0022] The stopper member 42 is arranged so as to overlap the surface of the base plate portion 41, and is configured to be a thick plate like the base plate portion 41. The plate thickness of the stopper member 42 is set so that when it is arranged so as to overlap the base plate portion 41, it protrudes to a position facing the vertical frame 24B of the outer screen 20B. The stopper member 42 is provided with a guide tubular portion 42a, a guide protrusion 42b, and a storage recess 42c on the surface facing the base plate portion 41 (hereinafter referred to as the facing surface). The guide tubular portion 42a is cylindrical and provided at the upper end of the stopper member 42, and is formed so as to protrude from the facing surface. The outer diameter of the guide tubular portion 42a is formed to a dimension that allows it to rotatably fit into the bearing hole 41a of the base plate portion 41. A shaft insertion hole 42d is provided in the center of the guide tubular portion 42a so as to penetrate the stopper member 42. The guide protrusion 42b protrudes from the opposing surface toward the base plate 41, and is formed to have a plate thickness that allows it to be inserted into the narrow portion of the rotation guide groove 41b where the engagement wall 41e is provided. An engagement protrusion 42e is provided at the protruding end of the guide protrusion 42b. The engagement protrusion 42e protrudes from the guide protrusion 42b toward the center. This engagement protrusion 42e is configured so that it can be inserted into the portion of the rotation guide groove 41b where the engagement wall 41e is not provided, and faces the engagement wall 41e when the guide protrusion 42b is disposed in the narrow portion of the rotation guide groove 41b.

[0023] The accommodation recess 42c has a shaft guide hole 42f and an arm accommodation portion 42g. The shaft guide hole 42f is a recess with a circular cross section, and is provided in a portion corresponding to the arc center of the lock groove portion 41g described above. A pin insertion hole 42h penetrates the center of the shaft guide hole 42f. The arm accommodation portion 42g is a recess having a sector shape centered on the pin insertion hole 42h, and is provided in a portion on the exterior side of the shaft guide hole 42f. A lock piece 43 is disposed in the accommodation recess 42c.

[0024] The lock piece 43 has a shaft portion 43a having a circular outer shape, a key pin portion 43b protruding from the center of the shaft portion 43a, and a plate portion 43c protruding from the peripheral surface of the shaft portion 43a. The shaft portion 43a has an outer diameter that allows it to fit into the shaft guide hole portion 42f of the accommodation recess 42c. The key pin portion 43b has a hexagonal cross section and is provided on one surface of the shaft portion 43a. The above-mentioned lock piece 43 is accommodated in the accommodation recess 42c with the shaft portion 43a fitted into the shaft guide hole portion 42f and the plate portion 43c disposed in the arm accommodation portion 42g with the key pin portion 43b inserted into the pin insertion hole 42h. The lock piece 43 accommodated in the accommodation recess 42c can rotate around the key pin portion 43b within a range in which the plate portion 43c abuts against both ends of the arm accommodation portion 42g. The dimension of the key pin portion 43b in the axial direction is set to be equal to or smaller than the dimension of the pin insertion hole 42h in the axial direction. As a result, when the lock piece 43 is accommodated in the accommodation recess 42c, the key pin portion 43b is accommodated in the pin insertion hole 42h, and the tip of the key pin portion 43b does not protrude from the surface of the stopper member 42. A stopper lock spring 44 is interposed between the lock piece 43 and the stopper member 42, for biasing the plate portion 43c so as to maintain a state in which it is constantly in contact with the upper end of the arm accommodation portion 42g.

[0025] The stopper member 42 configured as described above is held in a state of being superimposed on the surface of the substrate 41 by fitting the guide tubular portion 42a into the bearing hole 41a with the guide projection 42b inserted into the rotation guide groove 41b, and by mounting the shaft member 45 into the shaft mounting hole 41d through the shaft insertion hole 42d. Between the stopper member 42 and the substrate 41, a torsion coil spring 46 is interposed which rotates the stopper member 42 in one direction relative to the substrate 41. In this embodiment, the torsion coil spring 46 is provided around the guide tubular portion 42a so as to constantly rotate the stopper member 42 counterclockwise relative to the substrate 41 when viewed from the surface side of the stopper member 42. Also, a lock pin 47 is mounted on the plate portion 43c of the lock piece 43 from the back side of the substrate 41 through the key lock groove 41c. A cover member 48 for hiding the shaft insertion hole 42d is provided on the surface of the stopper member 42. The cover member 48 is provided with a key insertion hole 48a at a position corresponding to the pin insertion hole 42h of the stopper member 42.

[0026] When the guide protrusions 42b are inserted into the rotation guide grooves 41b and the lock pin 47 is disposed in the unlock grooves 41f of the key lock grooves 41c, the stopper member 42 held on the base plate 41 can rotate around the axis of the guide tubular portion 42a within the range where the guide protrusions 42b abut on both ends of the arc of the rotation guide grooves 41b. In this embodiment, as shown in Fig. 7 and Fig. 8, the guide protrusions 42b and the rotation guide grooves 41b are provided so that the peripheral surface of the stopper member 42 facing the outside (hereinafter referred to as the outer surface 42j) can rotate between a position that is approximately vertical on the inside of the room from the sliding area of ​​the inner sash 20A to a position that is inclined so that the lower end faces the inside of the room.

[0027] When the outer surface 42j of the stopper member 42 is substantially vertical, the lock pin 47 can be positioned in the lock groove portion 41g by rotating the lock piece 43. In this state, the stopper member 42 cannot rotate relative to the base plate portion 41, and the outer surface 42j is maintained in a position along the vertical direction. As described above, the key pin portion 43b of the lock piece 43 is housed in the pin insertion hole 42h provided in the stopper member 42. Therefore, the lock piece 43 can be rotated only when a key 50 is inserted that can be inserted into the pin insertion hole 42h via the key insertion hole 48a and has a hole in its tip surface into which the key pin portion 43b fits.

[0028] As is clear from the figure, the stopper member 42 is provided with an open limiting protrusion 42k. The open limiting protrusion 42k protrudes from the outer surface 42j of the stopper member 42 toward the outside of the room, and can appear and disappear in the sliding area of ​​the inner door 20A by rotating the stopper member 42 relative to the base plate portion 41. When the lock pin 47 is disposed in the lock groove portion 41g, as shown in FIG. 3, the open limiting protrusion 42k is maintained in a state of protruding into the sliding area of ​​the inner door 20A against the spring force of the torsion coil spring 46. In this state, the lower end surface of the open limiting protrusion 42k is positioned opposite the upper surface of the upper frame 22A, and as shown in FIG. 7, when the inner door 20A is slid upward, the open limiting protrusion 42k abuts against the upper frame 22A of the inner door 20A, preventing the inner door 20A from further sliding upward. This makes it possible to maintain a small gap between the lower frame 12 and the lower rail 23A, for example.

[0029] On the other hand, when the key 50 is inserted through the pin insertion hole 42h and the lock piece 43 is rotated against the spring force of the stopper lock spring 44 to place the lock pin 47 in the unlock groove 41f, the stopper member 42 can be rotated clockwise against the spring force of the torsion coil spring 46 (unlock operation). In this state, the opening limiting protrusion 42k is retracted from the sliding area of ​​the inner screen 20A, so that the upper frame 22A of the inner screen 20A can be slid to a position above the opening limiting device 40, as shown in FIG. 8.

[0030] When the operating force applied to the stopper member 42 is removed with the upper frame 22A of the inner screen 20A positioned above the opening limiting device 40, the spring force of the torsion coil spring 46 causes the opening limiting protrusion 42k of the stopper member 42 to come into contact with the vertical frame 24A of the inner screen 20A. Therefore, when the inner screen 20A is slid downward from this state, the spring force of the torsion coil spring 46 causes the stopper member 42 to rotate toward the outside of the room when the upper frame 22A is positioned below the opening limiting protrusion 42k, and as shown in Figure 3, the opening limiting protrusion 42k is again positioned opposite the upper frame 22A of the inner screen 20A. In other words, when the inner screen 20A is slid downward, the opening limiting protrusion 42k is automatically positioned opposite the upper frame 22A without any operation, so that the gap between the lower frame 12 and the lower frame 23A is maintained small even when the inner screen 20A is slid upward again after that. Moreover, when the opening limiting protrusion 42k protrudes into the sliding area, the lock piece 43 rotates due to the spring force of the stopper lock spring 44, and the lock pin 47 returns to the state where it is positioned in the lock groove portion 41g. As a result, it is necessary to operate the key 50 again to slide the inner screen 20A to the fully open position.

[0031] Here, in this fitting, when the latch 30 is disengaged as described above, the inner screen 20A can be moved to an inward tilted position. Therefore, if the latch 30 is operated incorrectly, there is a concern that the inner screen 20A may tilt toward the room against the user's will. Moreover, when the inner screen 20A is in an inward tilted position, the upper frame 22A is located inside the room, so the opening limiting device 40 cannot function, and the inner screen 20A can be opened wide even when the opening limiting protrusion 42k is located in the sliding area of ​​the inner screen 20A.

[0032] Therefore, in the above-mentioned fitting, a locking device 60 is provided on one of the latches 30. The locking device 60 prevents the latch 30 from being disengaged when it is locked, and is comprised of a device main body 61, a locking member 62, a hook member (locking mechanism) 63, and a lock cover 64.

[0033] The device body 61 has a base plate 61a and an opposing wall portion 61b protruding at a right angle from one end of the base plate 61a, and is attached to the upper surface of the upper frame 22A with the base plate 61a overlapping the upper surface of the latch 30. The base plate 61a is formed to a size that can cover and hide the operation guide groove 31a and the operation protrusion 32a of the latch 30. The base plate 61a has an operation window 61c in the center and guide rails 61d on the upper surface of the portions on both sides of the operation window 61c. The operation window 61c is formed to a size that can expose the operation guide groove 31a and the operation protrusion 32a to the outside and can operate the engagement member 32 of the latch 30 to a retracted position via the operation protrusion 32a. The guide rails 61d are for supporting the lock member 62 described below slidably along the projection direction, and protrude upward from both side edges of the base plate 61a in a state that they are approximately parallel to each other. A slide stopper 61e is provided on each end of the guide rail 61d that is separated from the opposing wall portion 61b. The slide stoppers 61e are protruding portions that are bent from the upper edge portion of the guide rail 61d in a direction that brings them closer to each other. The opposing wall portion 61b protrudes upward from the upper surface of the base plate 61a. The protruding dimension of the opposing wall portion 61b is set to be larger than that of the guide rail 61d. A hook receiving portion (lock mechanism) 61f is provided on the opposing wall portion 61b in a portion that faces the interior of the room.

[0034] The hook receiving portion 61f protrudes toward the room from a portion that is approximately the center of the opposing wall portion 61b. A receiving claw portion 61g is provided at the protruding end of the hook receiving portion 61f. The receiving claw portion 61g is bent from the hook receiving portion 61f in a direction approaching one of the guide rails 61d. In the illustrated example, the receiving claw portion 61g is formed so as to bend to the right when viewed from above. A receiving guide surface 61h is provided at the protruding end of the receiving claw portion 61g so as to gradually become more to the left when facing the room.

[0035] The locking member 62 is a rectangular parallelepiped having a size that can cover and hide the upper surface of the base plate 61a. The locking member 62 has guide grooves 62a on both sides and an engagement protrusion 62b on a portion facing the upper surface of the base plate 61a. The guide groove 62a is a recess in which the slide stopper 61e is disposed when the locking member 62 is disposed on the upper surface of the base plate 61a. In a state in which the slide stopper 61e is disposed in the guide groove 62a, the locking member 62 can be slidably disposed between the guide rails 61d on the upper surface of the base plate 61a. The engagement protrusion 62b is a protrusion provided on one side of the accommodation groove 62c by providing the accommodation groove 62c in the locking member 62. The accommodation groove 62c is formed to a size that can accommodate the operation protrusion 32a when the engagement member 32 of the latch 30 is in a protruding state. The engagement protrusion 62b prevents the engagement member 32 from moving to the retracted position by contacting the operation protrusion 32a of the latch 30. Two elastic claws 62d are provided on the end of the locking member 62 close to the opposing wall 61b. The elastic claws 62d protrude from a portion located between the guide rails 61d toward the opposing wall 61b, and then bend in a direction away from each other. The elastic claws 62d function to prevent the locking member 62 from falling off by contacting the slide stopper 61e when the locking member 62 is separated from the opposing wall 61b. When the elastic claws 62d are in contact with the slide stopper 61e, the operation window 61c of the base plate 61a is opened upward, and the operation protrusion 32a of the latch 30 is released from the accommodation groove 62c.

[0036] The hook member 63 has an arm portion 63b protruding from the peripheral surface of a cylindrical base portion 63a along the radial direction. The base portion 63a has a hook shaft portion 63c at the center of one end face and a lock shaft portion 63d at the center of the other end face. The hook shaft portion 63c is cylindrical and has a smaller diameter than the base portion 63a of the hook member 63. The lock shaft portion 63d is cylindrical and has a smaller diameter than the base portion 63a of the hook member 63 and a hexagonal cross section. The lock shaft portion 63d of this embodiment is formed to have the same cross section as the key pin portion 43b of the lock piece 43 described above. The hook member 63 is accommodated in the accommodation portion 62e of the lock member 62 via the hook shaft portion 63c with the arm portion 63b extending to the outside of the room, and can rotate around the axis of the hook shaft portion 63c. The dimension along the axial direction of the hook shaft portion 63c is set so that when the hook member 63 is accommodated in the locking member 62, it is accommodated in the accommodating portion 62e and the upper end portion does not protrude from the upper surface of the locking member 62.

[0037] The arm portion 63b of the hook member 63 is provided with a hook claw 63f and a hook guide surface 63g. The hook claw 63f protrudes from the tip of the arm portion 63b in a direction substantially perpendicular to the wall portion 61b. When the hook member 63 rotates about the hook shaft portion 63c with the lock member 62 disposed at the position closest to the wall portion 61b, the hook claw 63f can engage with the receiving claw portion 61g of the hook receiving portion 61f provided on the wall portion 61b. In the illustrated example, the hook claw 63f is provided so as to protrude toward the left side so as to engage with the receiving claw portion 61g by the hook member 63 rotating counterclockwise when viewed from above. The hook guide surface 63g is inclined so as to gradually become rightward toward the outside of the room, and can abut against the receiving guide surface 61h of the receiving claw portion 61g when the lock member 62 is slid in a direction approaching the wall portion 61b. A latch lock spring 65 is provided between the hook member 63 and the lock member 62. The latch lock spring 65 urges the hook member 63 to constantly rotate counterclockwise relative to the lock member 62 when viewed from above, and functions to maintain the tip of the hook member 63 in a state aligned with the projection direction with the tip facing the outside of the room.

[0038] The lock cover 64 is configured to have side portions 64b on both sides of a front plate 64a. The lock cover 64 covers the top surface and both side surfaces of the lock member 62, and is attached to the lock member 62 in a state where it covers the gap between the lock member 62 and the opposing wall portion 61b of the device main body 61. A lock section key insertion hole 64c is provided in a portion of the front plate 64a that faces the lock shaft portion 63d of the hook member 63. The lock section key insertion hole 64c has the same inner diameter as the key insertion hole 48a provided in the cover member 48, and allows the key 50 that operates the key pin portion 43b to be inserted therein.

[0039] In the locking device 60 configured as above, when the locking member 62 is in a state of being moved to the inside of the room, it is possible to disengage the latch 30 through the operation window 61c. In contrast, when the locking member 62 is slid to the outside of the room and abuts against the opposing wall portion 61b, the hook guide surface 63g abuts against the receiving guide surface 61h during this time, and the hook member 63 rotates clockwise when viewed from above against the spring force of the latch lock spring 65, and the hook claw 63f of the hook member 63 moves to a position beyond the receiving claw portion 61g of the hook receiving portion 61f. After that, the hook member 63 rotates in the opposite direction to the previous direction due to the spring force of the latch lock spring 65, and the hook claw 63f is engaged with the receiving claw portion 61g, resulting in a locked state. In this locked state, the locking member 62 is prevented from sliding toward the inside of the room relative to the device body 61. Moreover, the engagement portion between the hook member 63 and the hook receiving portion 61f is covered by the cover member 48, and it is difficult to release the engagement between the hook member 63 and the hook receiving portion 61f from the outside. Furthermore, when the hook claw 63f is engaged with the receiving claw portion 61g, the operation window 61c of the base plate 61a is covered and hidden, and the engagement protrusion 62b is in contact with the operation protrusion 32a of the latch 30. Therefore, it is impossible to disengage the latch 30 via the operation protrusion 32a, and the engagement member 32 of the latch 30 is maintained in a protruding state, so there is no concern that the inner sash 20A will be inadvertently placed in an inwardly tilted position.

[0040] From the above-mentioned state, the hook claw 63f and the receiving claw 61g can be disengaged by inserting the key 50 into the key insertion hole 48a and operating the hook member 63 via the lock shaft 63d to rotate the hook member 63 clockwise against the spring force of the latch lock spring 65 (unlock operation). Therefore, if the lock member 62 is slid toward the inside of the room, the operation guide groove 31a and the operation protrusion 32a of the latch 30 will appear outside through the operation window 61c. At this time, the abutment state between the operation protrusion 32a and the engagement protrusion 62b is also released. Therefore, from this state, the latch 30 can be disengaged to retract the engagement member 32, and the inner screen 20A can be moved to the inward tilt position by retracting the engagement member 32 of the other latch 30. After the inner screen 20A is moved to the inward tilt position, the latch 30 can be returned to the inoperable state by sliding the lock member 62 to abut against the opposing wall portion 61b again. Even in this state, if the upper frame 22A of the inner screen 20A is rotated toward the outside of the room, the tilting action of the latch guide surface 32b abutting the vertical frames 13, 14 causes the engaging member 32 to move backward against the spring force of the coil spring 33, and the inner screen 20A can be returned to an upright position.

[0041] In the above embodiment, a fitting having a plurality of shoji screens is exemplified, but the present invention is not limited thereto. In the above embodiment, the outer shoji screen arranged on the outside of the room is fixed to the frame body, but it is not necessary that some of the plurality of shoji screens are fixed to the frame body. Furthermore, a fitting having an opening limiting device 40 is exemplified, but an opening limiting device is not necessarily provided. In addition, since the key 50 is shared with the locking device 60 when the opening limiting device 40 is provided, it is advantageous in terms of convenience, but the present invention is not necessarily limited thereto. Furthermore, the locking device 60 is provided on the latch 30 on the left side as viewed from the inside of the room, but it may be provided on the right side as viewed from the inside of the room, or on both the left and right sides.

[0042] In addition, in the above-described embodiment, an example is given of a locking device 60 that automatically enters a locked state when the locking member 62 is brought close to the opposing wall portion 61b of the device main body 61, but the present invention is not limited to this, and the device may be configured to enter a locked state by a locking operation using the key 50.

[0043] As described above, the fittings of the present invention are fittings in which a latch provided on the upper edge of a shoji screen can be engaged to allow the shoji screen to slide up and down relative to the frame, and when the latch is disengaged via an operating unit, the upper edge of the shoji screen can be moved around the lower edge to an inward-tilted position in which it protrudes into the room, and the shoji screen is characterized in that it is provided with a locking device that prevents the latch from being disengaged when the shoji screen is in a locked state, and that maintains the shoji screen in the locked state unless an unlocking operation is performed using a key. According to this invention, the latch cannot be disengaged unless the locking device is unlocked with a key, making it possible to prevent the screen from inadvertently moving inwardly relative to the frame.

[0044] Furthermore, the present invention is characterized in that, in the above-mentioned fittings, the locking device comprises a device main body that is attached to the shoji screen with the operating part exposed to the outside, a locking member that is attached to the device main body while preventing movement of the operating part in the disengagement direction, and a locking mechanism that prevents movement of the locking member relative to the device main body when the locking member is attached to the device main body and in a locked state, but allows movement of the locking member relative to the device main body when the unlocking operation is performed by the key. According to this invention, by mounting the locking member to the device body, the movement of the locking member relative to the device body is prevented, so that it is impossible to disengage the latch.

[0045] The present invention is also characterized in that, in the above-mentioned building fixture, the locking member is provided with an engagement protrusion that engages with the operating portion when attached to the device main body to prevent movement in the disengagement direction. According to this invention, the engaging projection of the locking member engages with the operating portion of the latch, making it impossible to disengage the latch.

[0046] Furthermore, the present invention is characterized in that, in the above-mentioned building fixture, the locking mechanism comprises a hook member rotatably arranged on the locking member and a hook receiving portion provided on the device body, and when the locking member is attached to the device body, the hook member engages with the hook receiving portion to prevent movement of the locking member relative to the device body, and the hook member rotates in the direction of disengaging from the hook receiving portion only when the unlocking operation is performed by the key. According to this invention, by engaging the hook member with the hook receiving portion, it is possible to prevent the locking member from moving relative to the device body, and the operation of releasing the engagement of the latch becomes impossible.

[0047] The present invention is also characterized in that, in the above-mentioned building fixture, an opening limiting device is provided directly or indirectly on a structure supporting the frame, and engages with the screen to limit the upper limit opening position of the screen, the opening limiting device allowing the screen to move to the fully open position only when it is unlocked with a key, and the locking device is configured so that it can be unlocked with the key of the opening limiting device. According to this invention, since the locking device and the opening limiting device can be unlocked by a common key, there is no need to manage separate keys, which is advantageous in terms of convenience. The opening limiting device may be directly attached to the body, or may be indirectly attached to the body via a frame or frame. When the opening limiting device is indirectly attached to the body via a frame or frame, it is not necessary for the connecting member such as the mounting screw for fixing the board part to reach the body directly, and it is sufficient that it reaches the frame or frame attached to the body.

[0048] In addition, the latch locking device of the present invention is a locking device for locking a latch that is provided on a shoji screen that can slide up and down relative to a frame body and can move to an inward-tilted position with its upper edge protruding into the room, centered on its lower edge, and that prevents the shoji screen from moving to the inward-tilted position when engaged with the frame body, but allows the screen screen to move to the inward-tilted position when disengaged via an operating unit, and is characterized by comprising: a device main body that is attached to the shoji screen with the operating unit exposed to the outside; a locking member that is attached to the device main body with the operating unit exposed to the outside; and a locking mechanism that prevents the locking member from moving relative to the device main body when the locking member is attached to the device main body and in a locked state, but allows the locking member to move relative to the device main body when the locking member is attached to the device main body and in a locked state, but allows the locking member to move relative to the device main body when the locking member is unlocked with a key. According to this invention, the latch cannot be disengaged unless the locking device is unlocked with a key, making it possible to prevent the screen from inadvertently moving inwardly relative to the frame. [Explanation of symbols]

[0049] 10 frame body, 16 frame, 20A inner screen, 30 latch, 32a operation protrusion, 40 opening restriction device, 50 key, 60 locking device, 61 device body, 61a base plate, 61b opposing wall portion, 61c operation window, 61d guide rail, 61e slide stopper, 61f hook receiving portion, 61g claw portion, 61h guide surface, 62 lock member, 62a guide groove, 62b engagement protrusion, 62c storage groove portion, 62d elastic claw piece, 63 hook member, 63a base portion, 63b arm portion, 63c hook shaft portion, 63d lock shaft portion, 63e storage portion, 63f hook claw, 63g hook guide surface, 64 lock cover, 64a surface plate, 64b side portion, 64c lock portion key insertion hole, 65 Latch lock spring, B body

Claims

1. A fitting in which a latch provided on the upper edge of a shoji screen can be engaged to allow the shoji screen to slide up and down relative to a frame body, and when the latch is disengaged via an operating unit, the upper edge of the shoji screen can be moved around the lower edge to a position where it protrudes into the room, The shoji screen is equipped with a locking device that prevents the latch from being disengaged when the screen is in a locked state and maintains the screen in the locked state unless an unlocking operation is performed using a key.

2. The locking device is A device main body that is attached to the shoji screen with the operation unit exposed to the outside; a locking member that is attached to the device body in a state where the operation unit is prevented from moving in a disengagement direction; a lock mechanism that prevents the lock member from moving relative to the device body when the lock member is attached to the device body and in a locked state, and allows the lock member to move relative to the device body when the lock member is unlocked by the key; The fixture according to claim 1, further comprising:

3. 3. The fixture according to claim 2, wherein the locking member is provided with an engagement protrusion that, when attached to the device body, engages with the operating portion to prevent movement in the disengagement direction.

4. The fixture described in claim 2, characterized in that the locking mechanism comprises a hook member rotatably arranged on the locking member and a hook receiving portion provided on the device body, and when the locking member is attached to the device body, the hook member engages with the hook receiving portion to prevent movement of the locking member relative to the device body, and the hook member is rotated in the direction of disengaging from the hook receiving portion only when the unlocking operation is performed by the key.

5. An opening limiting device is provided directly or indirectly on a body supporting the frame and engages with the door to limit the upper limit opening position of the door; The opening restriction device allows the door to move to a fully open position only when the door is unlocked by a key, The fixture according to claim 1, wherein the locking device is configured to be unlocked by a key of the opening restriction device.

6. A locking device for locking a latch that is provided on a door frame that can slide vertically relative to the frame and can move to an inward tilted position with its upper edge protruding into the room from its lower edge, and that prevents the door frame from moving to its inward tilted position when the locking device is engaged with the frame, but allows the door frame to move to its inward tilted position when the locking device is disengaged via an operating unit. A device main body that is attached to the shoji screen with the operation unit exposed to the outside; a locking member that is attached to the device body in a state where the operation unit is prevented from moving in a disengagement direction; a lock mechanism that prevents the lock member from moving relative to the device body when the lock member is attached to the device body and in a locked state, and allows the lock member to move relative to the device body when an unlocking operation is performed by a key; A latch locking device comprising:

Images