Door and window locking device

Abstract

To provide a fitting locking device capable of allowing a user performing a locking / unlocking operation and a sash open / close operation without using hands.SOLUTION: The fitting locking device for locking / unlocking a sash provided to a fitting that opens / closes an opening by sliding to move the sash stored in a frame laterally includes: a locking device body provided to a sash for allowing a user to perform a locking / unlocking operation by moving the moving member up and down; and an operation part provided to the front face of the sash at the indoor side, which moves the moving member up / down when an operator performs to move up and down the same. The operation part has an operation protrusion that protrudes indoor side to allow an operator to press up and down with an elbow.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present disclosure relates to a locking device for furniture.

Background Art

[0002] Conventionally, there is known a locking device for furniture that unlocks by pushing down an operating member provided on a summons frame of a shoji screen from the indoor side downward (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since the operating member of the locking device for furniture is touched by a person's hand every time a locking / unlocking operation and an opening / closing operation of a shoji screen are performed, if bacteria or viruses adhere to the operator's hand, there is a risk that the bacteria or viruses will infect other people through the operating member.

[0005] Furthermore, in the case of an operator carrying a load in both hands or an operator with a disability, it may be very difficult to perform the locking / unlocking operation and the opening / closing operation of the shoji screen.

[0006] An object of the present disclosure is to provide a locking device for furniture that can perform a locking / unlocking operation and an opening / closing operation of a shoji screen without using hands.

Means for Solving the Problems

[0007] The locking device for a door or window, provided on a door or window that opens and closes an opening by sliding a sliding screen housed within a frame horizontally, locks and unlocks the sliding screen, and comprises: a locking device body provided on the sliding screen that performs locking and unlocking operations by vertical movement of a movable member; and an operating part provided on the interior-facing surface of the sliding screen that moves the movable member up and down when operated vertically by an operator, wherein the operating part has an operating projection that protrudes toward the interior and can be pressed vertically by the operator's elbow. [Brief explanation of the drawing]

[0008] [Figure 1] This is a front view of the door / window from the interior side. [Figure 2] This is a longitudinal cross-section along line AA in Figure 1. [Figure 3] This is a cross-sectional view along line BB in Figure 1. [Figure 4] This diagram shows the internal structure of the locking mechanism body during the locking operation of a door and window locking device. [Figure 5] This diagram shows the internal structure of the locking mechanism during the unlocking operation of a door and window lock. [Figure 6] This is a perspective view showing the guide spur gear and trigger of a locking device for building fixtures. [Figure 7] This is a perspective view showing large-diameter and small-diameter spur gears for a door locking mechanism. [Figure 8] This is a view from the outside of the room of the locking mechanism installed on the meeting stile of an interior sliding door. [Figure 9] This is a view from the outside of the room of the receiving device installed on the meeting stile of the outer shoji screen. [Figure 10] This is a perspective view showing the operating section of a locking device for building fixtures. [Figure 11] This diagram shows the usage status of the building fixtures. [Figure 12] This is a perspective view showing another embodiment of the control unit. [Figure 13] This is a perspective view showing another embodiment of the control unit. [Figure 14]This is a perspective view showing another embodiment of the control unit. [Figure 15] This is a perspective view showing another embodiment of the control unit. [Figure 16] This is a perspective view showing another embodiment of the foot control unit. [Figure 17] This is a perspective view showing another embodiment of the foot control unit. [Modes for carrying out the invention]

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The joinery shown in this embodiment is a sliding window 1 that opens and closes an opening in the building structure using an inner sash 3 and an outer sash 4.

[0010] In the diagram, the direction along X1-X2 indicates the interior-exterior direction of the sliding window 1. Direction X1 indicates the exterior side of the sliding window 1, and direction X2 indicates the interior side of the sliding window 1. Figure 1 is a view of the sliding window 1 from the interior side. The top and bottom of each diagram correspond to the top and bottom along the vertical direction of the sliding window 1. In the sliding window 1, the visible surface is the surface facing the exterior and interior sides, respectively. In the sliding window 1, the horizontal direction and left-right direction refer to the direction along the movement of the inner sash 3 and outer sash 4 when opening and closing.

[0011] The sliding window 1 comprises a frame 2 that is attached to an opening in the building structure, and an inner sash 3 and an outer sash 4 that are slidably housed inside the frame 2. The frame 2 is constructed by framing an upper frame 21, a lower frame 22, and left and right vertical frames 23 in a rectangular shape. As shown in Figure 2, the interior rail 211 and the exterior rail 212 protrude downward from the depth surface of the upper frame 21. The interior rail 221 and the exterior rail 222 protrude upward from the depth surface of the lower frame 22.

[0012] The interior shutter 3 is arranged on the indoor side inside the frame body 2. The interior shutter 3 has a face material 35 such as glass housed inside a frame body 30 formed by rectangularly framing an upper frame 31, a lower frame 32, a door-end frame 33, and a summons frame 34. As shown in FIGS. 2 and 3, the summons frame 34 of the interior shutter 3 has a summons frame main body 341 in which the face material 35 is housed, and a summons frame extension portion 342 that protrudes with the same width as the summons frame main body 341 on the indoor side of the summons frame main body 341. The interior shutter 3 engages across the indoor-side rail 211 of the upper frame 21 and the indoor-side rail 221 of the lower frame 22, and is provided so as to be slidable in the left-right direction along the extension direction of the upper frame 21 and the lower frame 22.

[0013] The exterior shutter 4 is arranged on the outdoor side inside the frame body 2. The exterior shutter 4 is configured by housing a face material 45 such as glass inside a frame body 40 formed by rectangularly framing an upper frame 41, a lower frame 42, a door-end frame 43, and a summons frame 44. The exterior shutter 4 engages across the outdoor-side rail 212 of the upper frame 21 and the outdoor-side rail 222 of the lower frame 22, and is provided so as to be slidable in the left-right direction along the extension direction of the upper frame 21 and the lower frame 22.

[0014] As shown in FIGS. 1 to 3, when the interior shutter 3 and the exterior shutter 4 fully close the opening of the building body, the summons frame 34 of the interior shutter 3 and the summons frame 44 of the exterior shutter 4 are arranged to overlap in the indoor-outdoor direction. Both the summons frames 34 and 44 have a hollow shape. A fitting lock device 5 (hereinafter sometimes simply referred to as the lock device 5) for locking and unlocking the sliding window 1 is provided on the summons frames 34 and 44.

[0015] As shown in FIG. 2, the lock device 5 has a lock device main body 50A built in the summons frame 34 of the interior shutter 3 and a receiver 50B built in the summons frame 44 of the exterior shutter 4. The lock device 5 is configured to be lockable and unlockable by an operator operating an operation portion 6 provided on the summons frame 34 from the indoor side. The lock device main body 50A and the receiver 50B are respectively built in the vicinity of the central portion in the height direction of the summons frames 34 and 44. The operation portion 6 is arranged to be vertically movable on the indoor-side finding surface 34a in the vicinity of the central portion in the height direction of the summons frame 34.

[0016] As shown in Figures 4 and 5, the locking device body 50A has a rack 52, a guide spur gear 53, a large-diameter spur gear 54, a small-diameter spur gear 55, a trigger 56, and a hook 57 inside the case 51.

[0017] The rack 52 is positioned on the interior side of the case 51 and extends vertically within the meeting stile extension 342 of the meeting stile 34. Rack teeth 521 are formed on the exterior side of the rack 52 along its length. A support piece 511, integrally provided with the case 51, is positioned on the interior side of the rack 52. The support piece 511 extends vertically along the extension direction of the rack 52. The interior side of the rack 52 abuts against the support piece 511. The rack 52 is positioned within the case 51 so as to be slidable vertically along the support piece 511. The rack 52 is the movable member in this disclosure.

[0018] A connecting plate 522 is attached to the rack 52. The connecting plate 522 extends from the rack 52 toward the interior and protrudes from a notch 34c formed in the interior surface 34a of the meeting stile 34 of the interior sliding door 3, as shown in Figure 2. The vertical length of the notch 34c corresponds to the vertical movement stroke of the rack 52. The connecting plate 522 is connected to an operating unit 6 located on the interior surface 34a of the meeting stile 34. The operating unit 6 is provided to be movable vertically together with the rack 52.

[0019] The rack 52 has a stepped portion 523 extending along the length of the rack 52 on the outdoor side surface where the rack teeth 521 are provided. The stepped portion 523 is provided with engaging recesses 523a and 523b that are spaced apart vertically.

[0020] A kick spring 524 is positioned on the outdoor side of the rack 52. The kick spring 524 is hooked onto a pin 513 that protrudes into the case 51. One end 524a of the kick spring 524 is hooked onto a locking pin 514 provided inside the case 51. The other end 524b of the kick spring 524 is bent into an arc shape and elastically contacts the stepped portion 523 of the rack 52.

[0021] The engaging recesses 523a and 523b provided in the stepped portion 523 define the upper and lower ends of the rack 52's movement stroke. At the upper end of the rack 52's movement stroke, as shown in Figure 5, the other arc-shaped end 524b of the kick spring 524 engages with the lower engaging recess 523b. At the lower end of the rack 52's movement stroke, as shown in Figure 6, the lower end of the rack 52 protrudes downward from the lower plate 512 of the case 51. The other arc-shaped end 524b of the kick spring 524 engages with the upper engaging recess 523a. As the rack 52 moves up and down, a click sensation is obtained at the upper and lower ends of the movement stroke, and the rack 52 is held in place at each position, thus improving operability.

[0022] The guide spur gear 53 is located in the lower part of the case 51 and is rotatably supported on a pivot shaft J1 provided in the case 51. The guide spur gear 53 meshes with the rack teeth 521. As shown in Figure 6, the guide spur gear 53 has a boss portion 531 that protrudes along the pivot shaft J1. The outer circumference of the boss portion 531 is provided with an arc-shaped outer surface 531a and a locking surface 531b in which a part of the outer surface is cut flat. As a result, the cross-section of the boss portion 531 perpendicular to the pivot shaft J1 has a roughly D-shaped outer shape. The guide spur gear 53 is rotatable around the pivot shaft J1 in conjunction with the vertical movement of the rack 52.

[0023] The large-diameter spur gear 54 and the small-diameter spur gear 55 are located in the upper part of the case 51 and are rotatably supported on a pivot shaft J2 provided in the case 51. The large-diameter spur gear 54 meshes with the rack teeth 521. As shown in Figure 7, the large-diameter spur gear 54 and the small-diameter spur gear 55 are arranged coaxially. The large-diameter spur gear 54 has an engaging projection shaft 541 that protrudes along the pivot shaft J2. The small-diameter spur gear 55 has an engaging hole 551 that engages with the engaging projection shaft 541. The large-diameter spur gear 54 and the small-diameter spur gear 55 rotate together around the pivot shaft J2 in conjunction with the vertical movement of the rack 52, due to the engagement of the engaging projection shaft 541 and the engaging hole 551 with each other.

[0024] The trigger 56 is positioned within the case 51, above the guide spur gear 53 and below the large-diameter spur gear 54, along the direction of the interior-exterior orientation. The trigger 56 has a guide hole 561 that is elongated in the interior-exterior orientation. A guide projection 515 provided on the case 51 engages with the guide hole 561. The trigger 56 is supported so as to be movable in the interior-exterior orientation within a range in which the guide projection 515 is movable relative to the guide hole 561. As shown in Figure 5, when the trigger 56 is moved to its furthest exterior position, the exterior end of the trigger 56 protrudes outward from the case 51. At this time, the trigger 56 protrudes outward from the exterior facing surface 34b of the meeting stile 34 to the extent that it abuts against the meeting stile 44 of the outer sash 4.

[0025] A spring receiving portion 562 that protrudes downward is integrally provided on the lower surface of the trigger 56. One end of a compression spring 565 abuts against the spring receiving portion 562. The other end of the compression spring 565 is fixed to a spring fixing piece 516 provided on the case 51. The compression spring 565 protrudes outward from the spring fixing piece 516, and its protruding tip abuts against the spring receiving portion 562. When compressed, the compression spring 565 acts a biasing force toward the trigger 56 via the spring receiving portion 562, directed toward the outside.

[0026] An arc-shaped recess 563 is provided on the lower surface of the indoor end of the trigger 56. A flat locking surface 564 is provided on the lower surface further inside the arc-shaped recess 563, oriented in the indoor-outdoor direction. The guide spur gear 53 is supported by the support shaft J1 by fitting its boss portion 531 inside the arc-shaped recess 563 of the trigger 56. The arc-shaped outer peripheral surface 531a of the boss portion 531 is aligned with the arc-shaped surface of the arc-shaped recess 563.

[0027] The right side of the outdoor end of the trigger 56 is tapered towards the outside. As a result, an inclined surface 566 is formed on the outdoor tip of the trigger 56. When the inclined surface 566 comes into contact with the meeting stile 44 of the outer sash 4, it slides against the meeting stile 44, causing the trigger 56 to gradually retract toward the interior while compressing the compression spring 565.

[0028] The latch 57 is positioned between the large-diameter spur gear 54 and the trigger 56 within the case 51 and is rotatably supported by a support shaft J3 provided in the case 51. An arc-shaped engaging plate 571 and a gear section 572 are provided on the outer circumference of the latch 57, sandwiching the support shaft J3. The gear section 572 meshes with a small-diameter spur gear 55. Therefore, when the large-diameter spur gear 54 rotates in conjunction with the vertical movement of the rack 52, the latch 57 rotates via the small-diameter spur gear 55. The arc-shaped engaging plate 571 is positioned in a locked position and an unlocked position, respectively, by the rotation of the latch 57.

[0029] A spring-locking projection 573 is provided on the side of the latch 57. One end of a tension spring 574 is locked to the spring-locking projection 573. The other end of the tension spring 574 is locked to a spring-locking piece 517 provided on the case 51. The biasing force of the tension spring 574 acts in the locking direction from the middle of the locking process when the latch 57 is engaged with the receiver 50B, and acts in the unlocking direction from the middle of the unlocking process when the engagement with the receiver 50B is released. Therefore, the locking and unlocking operations can be performed smoothly.

[0030] The receiving device 50B has an engaging piece 58. The engaging piece 58 is positioned on the indoor-facing surface 44a of the meeting stile 44 of the outer sash 4 so as to be able to engage with the arc-shaped engaging plate 571 of the hanging device 57.

[0031] Figures 1 and 4 show the locked state of the locking device 5. In this state, the inner sash 3 and outer sash 4 are closed, and the meeting stiles 34 and 44 overlap. The rack 52 is positioned at the upper end of its movement stroke. The trigger 56 retracts to its innermost position by contacting the meeting stile 44 of the outer sash 4, compressing the compression spring 565. This state is the trigger activated state. The arc-shaped engaging plate 571 of the hook 57 protrudes from the outdoor-facing surface 34b of the meeting stile 34 of the inner sash 3 and engages with the engaging piece 58 of the receiver 50B. At this time, the guide spur gear 53 is rotatable inside the arc-shaped recess 563 of the trigger 56, so the rack 52 can move downward to unlock.

[0032] Figure 5 shows the unlocked state of the locking device 5. In this state, at least one of the inner sash 3 and the outer sash 4 is open, and the meeting stiles 34 and 44 are not overlapping. The rack 52 is positioned at the lower end of its movement stroke. This state is the trigger release state. The hook 57 rotates in conjunction with the downward movement of the rack 52, positioning the arc-shaped engaging plate 571 inside the case 51 and releasing the engagement with the engaging piece 58 of the receiving device 50B. At this time, the locked surface 531b of the boss portion 531 of the guide spur gear 53 faces the trigger 56, so the trigger 56 moves forward toward the outside due to the biasing force of the compression spring 565. The locked surface 564 of the advanced trigger 56 is positioned facing the locked surface 531b, so the guide spur gear 53 is unable to rotate. Therefore, the rack 52 cannot move upward unless the trigger 56 retracts toward the interior due to the overlapping of the meeting stiles 34 and 44, and thus the unlocked state is maintained.

[0033] The operating part 6 of the locking device 5 is connected to a connecting plate 522 that protrudes from a notch 34c on the indoor-facing surface 34a of the meeting stile 34 of the inner sliding door 3. As shown in Figure 10, the operating part 6 has an operating part body 61 that extends vertically along the extension direction of the indoor-facing surface 34a, and an operating projection 62 that further protrudes inward from the indoor side surface of the operating part body 61.

[0034] The operating unit body 61 is formed in a vertically elongated rectangular shape when viewed from the indoor side. The upper and lower ends 611 of the operating unit body 61 have flat surfaces that are substantially parallel to the indoor-facing surface 34a of the meeting stile 34. The central part 612 of the operating unit body 61 has a shape that rises gently towards the indoor side as it moves from the upper and lower ends 611 toward the center. Therefore, the operating unit 6 has a shape that makes it easy to grasp the central part 612 of the operating unit body 61 with your hand.

[0035] In this embodiment, the operating projection 62 is positioned on the indoor-facing surface of the central portion 612 of the operating unit body 61 and protrudes even more significantly toward the indoor side. The width of the operating projection 62 is approximately equal to the width of the operating unit body 61. The amount of protrusion of the operating projection 62 from the operating unit body 61 is approximately equal to the amount of protrusion of the central portion 612 from the indoor-facing surface 34a of the meeting stile 34. The surface 621 of the operating projection 62 does not have sharp corners, but is formed by a gently convex curved surface that is continuous with the surface of the operating unit body 61.

[0036] At least the surface of the operating projection 62 on the surface of the operating section 6 may be treated with an anti-slip finish. This increases the frictional resistance between the operating projection 62 and the elbow EL, specifically clothing or skin, when the operator OP operates the operating projection 62 with their elbow EL, as will be explained later. Since the elbow EL is less likely to slip when operating the operating section 6, the operability of the operating section 6 is improved. The anti-slip finish may be achieved by roughening the surface, or by coating the surface with rubber or resin with a high coefficient of friction. The operating projection 62 itself may also be formed from rubber or resin with a high coefficient of friction.

[0037] Next, as shown in Figure 11, we will describe the case in which operator OP, who is holding luggage in both hands, performs the locking and unlocking operations of the sliding window 1 and the opening and closing operations of the inner sash 3.

[0038] First, with the sliding window 1 fully closed, the operator OP places one elbow EL from the inside against the operating projection 62 of the operating unit 6, and pushes the operating projection 62 downwards. The operating unit 6 moves the rack 52 of the locking device body 50A downwards via the connecting plate 522. As shown in Figure 5, when the rack 52 is positioned at the lower end of the movement stroke, the rotation of the hook 57 releases the engagement between the arc-shaped engaging plate 571 and the engaging piece 58 of the receiving unit 50B, and the locking device 5 is unlocked.

[0039] Subsequently, as shown in Figure 11, the operator OP presses the operating part 6 laterally by moving the elbow EL in the opening direction D1 while keeping it in contact with the operating projection 62, thereby opening the inner sash 3. At this time, as shown in Figure 5, the trigger 56 moves forward toward the outside and the locking surface 564 and the locked surface 531b face each other, so the guide spur gear 53 cannot rotate. Therefore, even after the inner sash 3 is opened, the unlocked state is maintained even if the operator OP removes the elbow EL from the operating projection 62.

[0040] When closing the inner sash 3, the operator OP presses the operating part 6 laterally by moving their elbow EL, which is in contact with the operating projection 62, toward the closing direction D2, thereby closing the inner sash 3. When the inner sash 3 is fully closed, the trigger 56 retracts to its innermost position towards the interior, contacting the meeting stile 44 of the outer sash 4, as shown in Figure 4. At this time, the boss portion 531 of the guide spur gear 53 fits into the arc-shaped recess 563 of the trigger 56, so the guide spur gear 53 is rotatable. Therefore, after the inner sash 3 is fully closed, when the operator OP pushes the operating projection 62 upward with their elbow EL, the rack 52 moves upward and is positioned at the upper end of the movement stroke. As a result, the hook 57 rotates, and the arc-shaped engaging plate 571 engages with the engaging piece 58 of the receiving part 50B, and the locking device 5 is locked.

[0041] At least one of the locking / unlocking and opening / closing operations of the inner sliding door 3 may be performed by the operator OP by grasping the operating unit 6 with their hand.

[0042] The locking device 5 according to this embodiment provides the following effects.

[0043] (1) The locking device 5 for a door or window of this embodiment is provided on a sliding window 1, which is a door or window that opens and closes an opening by sliding an inner sash 3 housed in a frame 2 in the lateral direction, and is a locking device 5 for locking and unlocking the inner sash 3, and comprises a locking device body 50A provided on the inner sash 3 and performing locking and unlocking operations by moving a rack 52, which is a movable member, up and down, and an operating part 6 provided on the indoor side facing surface 34a of the inner sash 3 and moving up and down by an operator OP, which moves the rack 52 of the locking device body 50A up and down, and the operating part 6 has an operating projection 62 that protrudes toward the indoor side and can be pressed up and down by the elbow EL of the operator OP.

[0044] According to this design, the operator OP can lock and unlock the door locking device 5 and open and close the interior sliding door 3 from the inside using their elbow EL. Since there is no need to use their hands, the operator OP can easily perform the locking and unlocking operations and open and close the interior sliding door 3 even if they are carrying luggage in both hands or if they have limited use of their hands. Moreover, since the locking and unlocking operations can be performed without using hands, the risk of infection from bacteria and viruses transmitted through the hands is also reduced.

[0045] (2) In the locking device 5 for building fixtures described in (1) above, the operating part 6 is provided so that the inner sliding door 3 can be opened and closed after unlocking by being pressed in a lateral direction.

[0046] According to this design, the operator OP can open and close the inner sliding door 3 after unlocking it simply by moving their elbow EL, which is in contact with the operating unit 6, in a natural lateral motion, resulting in superior usability.

[0047] (3) In the locking device 5 for building fixtures described in (1) or (2) above, the locking device body 50A performs an unlocking operation by moving the rack 52 downward when the operating part 6 moves downward.

[0048] According to this, the operator OP can unlock the locking device 5 with a natural motion, simply by pushing down the operating projection 62 of the operating unit 6 with their elbow EL, making it very user-friendly.

[0049] The joinery described above is exemplified by a sliding window 1 having two sashes, an inner sash 3 and an outer sash 4, but the joinery of this disclosure is not limited to this. The joinery of this disclosure may have three or more sashes, or it may be a single-sliding window with only one sash. The joinery is not limited to windows, and may also be a single-sliding door for an entrance that opens and closes by sliding horizontally.

[0050] The operating projection provided on the operating section is not limited to the shape of the operating projection 62 shown in this embodiment. The operating projection may be formed such that its vertical width is smaller than that of the operating projection 62 shown in Figure 10, as in the operating projection 62A of the operating section 6A shown in Figure 12.

[0051] The operating projection may be formed with a vertical width greater than that of the operating projection 62 shown in Figure 10, as in the operating projection 62B of the operating section 6B shown in Figure 13. The innermost end face 621a of the operating projection 62B is formed as a substantially flat surface parallel to the indoor surface 34a of the meeting stile 34. Therefore, even if the vertical width of the operating projection 62 is increased, the amount of protrusion toward the indoor side is suppressed.

[0052] The operating projection may be formed as a thin plate that protrudes toward the interior, as shown in Figure 14, as the operating projection 62C of the operating section 6C. The tip 622 of the operating projection 62C is slightly bent upward. This makes it easier to rest the elbow EL on the operating projection 62C, improving the operability of the operating section 6 by the elbow EL.

[0053] The operating protrusions may be positioned at both the upper and lower ends 611 of the operating unit body 61, as shown in Figure 15, for example, as the operating protrusion 62D of the operating unit 6D. The operating protrusion 62D consists of a plate-shaped member that protrudes toward the interior from both the upper and lower ends 611 of the operating unit body 61. The operating protrusion 62D rises approximately perpendicular to the interior surface 34a of the meeting stile 34. The position of the interior-side tip of the operating protrusion 62D is approximately equal to the position of the central part 612 that protrudes most toward the interior. Since the tip edge of the operating protrusion 62D is formed in an arc shape, it is less likely to cause discomfort to the operator OP even if they touch it with their elbow EL during operation.

[0054] The operating protrusions, which are plate-shaped members positioned at both the upper and lower ends 611 of the operating unit body 61, may be formed with an even smaller protrusion toward the interior, as shown in Figure 16 for the operating unit 6E, 62E. By reducing the amount of the operating protrusion 62E protruding toward the interior, it is possible to suppress the unintentional collision of the operator's elbow EL with the operating protrusion 62E.

[0055] The operating protrusions located at both the upper and lower ends 611 of the operating unit body 61 may be formed by minute protrusions, as shown in Figure 17 for the operating unit 6F, namely the operating protrusion 62F. This further reduces the amount of the operating protrusion 62E protruding into the room and gives the operating unit 6 a cleaner appearance, thus improving its aesthetics. [Explanation of Symbols]

[0056] 1 Sliding window (joinery), 2 Frame, 3 Inner sash, 34a Indoor side facing surface, 5 Locking device, 50A Locking device body, 52 Rack (movable part), 6 Operating unit, 62, 62A, 62B, 62C, 62D, 62E, 62F Operating protrusion, OP Operator, EL Elbow

Claims

1. A locking device for a door that opens and closes an opening by sliding a shoji screen housed within a frame horizontally, and which locks and unlocks the shoji screen, A locking device body is provided on the aforementioned sliding door and performs locking and unlocking operations by the vertical movement of a movable member, The sliding door is provided on the interior side of the sliding door and includes an operating unit that moves the movable member up and down by being moved vertically by an operator, The operating section has an operating projection that protrudes toward the interior and can be pressed vertically by the operator's elbow. The moving member has engagement recesses that are arranged vertically apart and define the upper and lower end positions of the movement stroke, respectively. The locking device body has a spring member at one end that elastically contacts the movable member and engages with the engaging recess to hold the movable member at the upper and lower end positions, wherein the locking device body has a spring member.

2. The locking device for building fixtures according to claim 1, wherein the operating part is provided so that the sliding door can be opened and closed after unlocking by being pressed laterally.

3. The locking device for building fixtures according to claim 1 or 2, wherein the locking device body performs an unlocking operation by moving the movable member downward when the operating part moves downward.

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