Door and window locking device

Abstract

To provide a fitting locking device capable of allowing a user to perform hands-free locking / unlocking.SOLUTION: The fitting locking device for locking / unlocking a sash provided to a fitting that opens / closes an opening by sliding the sash stored in a frame to move in a lateral direction includes: a locking device body provided to the sash for performing a locking / unlocking operation by moving a moving member up and down up and down; a foot operation part that is provided movably vertically in the bottom of the sash at the indoor side; and a connecting member that connects the moving member and the foot operation part. The foot operation part is configured so as to lock / unlock the locking device body by the foot of an operator.SELECTED DRAWING: Figure 13

Description

Technical Field

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

Background Art

[0002] Conventionally, there is known a locking device for fittings 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 fittings is touched by a person's hand every time a locking and unlocking operation is 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 loads in both hands or an operator with a disability, it may be very difficult to perform the locking and unlocking operation.

[0006] An object of the present disclosure is to provide a locking device for fittings that can perform a locking and unlocking operation without using hands.

Means for Solving the Problems

[0007] ​The locking device for a door or window, provided for 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; a foot operating part provided on the lower part of the interior-facing surface of the sliding screen so as to be vertically movable; and a connecting member connecting the movable member and the foot operating part, wherein the foot operating part is provided so as to allow the operator's foot to lock or unlock, or both, the locking device body. [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 is a perspective view showing the foot-operated part of a door locking device. [Figure 5] This diagram shows the internal structure of the locking mechanism body during the locking operation of a door and window locking device. [Figure 6] This diagram shows the internal structure of the locking mechanism during the unlocking operation of a door and window lock. [Figure 7] This is a perspective view showing the guide spur gear and trigger of a locking device for building fixtures. [Figure 8] This is a perspective view showing large-diameter and small-diameter spur gears for a door locking mechanism. [Figure 9] 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 10] 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 11] This is an exploded perspective view showing the mounting structure of the foot control unit. [Figure 12A] This diagram shows the release state of the latch member provided on the foot-operated section. [Figure 12B] This diagram shows the holding state of the latch member provided on the foot operation section. [Figure 13] It is a diagram showing the usage state of a building fitting. [Figure 14] It is a diagram showing the unlocking operation of the lock device for the building fitting by the foot operation part. [Figure 15] It is a perspective view showing another embodiment of the foot operation part. [Figure 16] It is a perspective view showing another embodiment of the foot operation part. [Figure 17] It is a perspective view showing another embodiment of the foot operation part. [Figure 18] It is a perspective view showing another embodiment of the foot operation part. [Figure 19] It is a perspective view showing another embodiment of the foot operation part.

Embodiments for Carrying Out the Invention

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

[0010] In the arrows shown in the figure, the direction along X1 - X2 is the indoor - outdoor direction of the sliding window 1. The X1 direction indicates the outdoor side of the sliding window 1, and the X2 direction indicates the indoor side of the sliding window 1. FIG. 1 is a view of the sliding window 1 seen from the indoor side. The up - down in each figure corresponds to the up - down along the vertical direction of the sliding window 1. In the sliding window 1, the finding surface is the surface facing the outdoor side and the indoor side respectively. In the sliding window 1, the prospect surface is perpendicular to the finding surface and is the surface along the indoor - outdoor direction. In the sliding window 1, the lateral direction and the left - right direction refer to the direction along the moving direction of the inner shutter 3 and the outer shutter 4 when opening and closing. The left - right direction is based on the state of the sliding window 1 seen from the indoor side, with the right - hand side of the observer being the right and the left - hand side being the left.

[0011] The offset window 1 has a frame body 2 attached to the opening of the building body, and an inner shutter 3 and an outer shutter 4 that are slidably housed inside the frame body 2. The frame body 2 is configured by framing an upper frame 21, a lower frame 22, and left and right vertical frames 23 in a rectangle. As shown in FIG. 2, on the prospective surface of the upper frame 21, an indoor-side rail 211 and an outdoor-side rail 212 project downward. On the prospective surface of the lower frame 22, an indoor-side rail 221 and an outdoor-side rail 222 project upward.

[0012] The inner shutter 3 is disposed on the indoor side inside the frame body 2. The inner shutter 3 has a facing material 35 such as glass housed inside a frame body 30 formed by framing an upper frame 31, a lower frame 32, a door tip frame 33, and a summons frame 34 in a rectangle. As shown in FIGS. 2 and 3, the summons frame 34 of the inner shutter 3 has a summons frame main body 341 in which the facing material 35 is housed, and a summons frame extension part 342 that projects on the indoor side of the summons frame main body 341 with the same lateral width as the summons frame main body 341. The inner shutter 3 engages with 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 outer shutter 4 is disposed on the outdoor side inside the frame body 2. The outer shutter 4 is configured by housing a facing material 45 such as glass inside a frame body 40 formed by framing an upper frame 41, a lower frame 42, a door tip frame 43, and a summons frame 44 in a rectangle. The outer shutter 4 engages with 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 inner shutter 3 and the outer shutter 4 completely close the opening of the building body, the summons frame 34 of the inner shutter 3 and the summons frame 44 of the outer shutter 4 are arranged so as to overlap in the indoor-outdoor direction. The summons frames 34 and 44 both have a hollow shape. A hardware locking device 5 for locking and unlocking the offset window 1 (hereinafter, may be simply referred to as the locking device 5) is provided on the summons frames 34 and 44.

[0015] The locking device 5 comprises a locking device body 50A built into the meeting stile 34 of the inner sliding door 3, and a receiving device 50B built into the meeting stile 44 of the outer sliding door 4. In this embodiment, the locking device 5 is configured so that both locking and unlocking operations can be performed by an operator using their foot to operate a foot operating device 6 provided on the meeting stile 34 of the inner sliding door 3 from the inside. The foot operating device 6 is the first operating device for locking and unlocking the locking device 5. The locking device body 50A and the receiving device 50B are built into the meeting stiles 34 and 44, respectively, near the center in the height direction. The foot operating device 6 is located at the bottom of the indoor-facing surface 34a of the meeting stile 34 of the inner sliding door 3.

[0016] As shown in Figures 5 and 6, 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] The lower end of the rack 52 protrudes downward from the case 51. A tension spring 522 is provided across the lower end of the rack 52 protruding from the case 51 and the case 51. One end of the tension spring 522 is locked to a spring locking projection 522a provided on the lower end of the rack 52. The other end of the tension spring 522 is hooked onto the lower plate 512 of the case 51. The tension spring 522 extends when the rack 52 moves downward and acts as a biasing force to return the rack 52 to an upward position. This tension spring 522 is the biasing member in this disclosure.

[0019] A connecting plate 523 is attached to the rack 52. The connecting plate 523 extends from the rack 52 toward the interior and protrudes from the interior facing surface 34a of the meeting stile 34 of the interior sliding door 3. The connecting plate 523 is connected to a vertically elongated manual operation part 7 located on the interior facing surface 34a of the meeting stile 34. The manual operation part 7 is a manual operation component of the locking device 5 and is a second operation part for locking and unlocking the locking device 5. The manual operation part 7 is provided to be movable vertically in conjunction with the rack 52.

[0020] The rack 52 has a stepped portion 524 extending along the length of the rack 52 on the outdoor side surface where the rack teeth 521 are provided. The stepped portion 524 is provided with engaging recesses 524a and 524b that are spaced apart vertically.

[0021] A kick spring 525 is positioned on the outdoor side of the rack 52. The kick spring 525 is hooked onto a pin 513 protruding from the case 51. One end 525a of the kick spring 525 is secured to a locking pin 514 provided inside the case 51. The other end 525b of the kick spring 525 is bent into an arc shape and elastically contacts the stepped portion 524 of the rack 52.

[0022] The engaging recesses 524a and 524b provided in the stepped portion 524 define the upper and lower ends of the movement stroke of the rack 52. At the upper end of the movement stroke of the rack 52, as shown in Figure 5, the other arc-shaped end 525b of the kick spring 525 engages with the lower engaging recess 524b. At the lower end of the movement stroke of the rack 52, as shown in Figure 6, the other arc-shaped end 525b of the kick spring 525 engages with the upper engaging recess 524a. As the rack 52 moves up and down, a click sensation is obtained at the upper and lower ends of the movement stroke, improving operability.

[0023] The guide spur gear 53 is located in the lower part of the case 51 and is rotatably supported on a support shaft J1 provided in the case 51. The guide spur gear 53 meshes with the rack teeth 521. As shown in Figure 7, the guide spur gear 53 has a boss portion 531 that protrudes along the support 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 support shaft J1 has a roughly D-shaped outer shape. The guide spur gear 53 is rotatable around the support shaft J1 in conjunction with the vertical movement of the rack 52.

[0024] 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 8, 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.

[0025] 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 6, 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Figures 1 and 5 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.

[0033] Figure 6 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 regardless of the biasing force of the tension spring 522, and the unlocked state is maintained.

[0034] The foot-operated part 6, which is the first operating part of the locking device 5, is located at the lower part of the meeting stile 34 of the inner sliding door 3 and protrudes inward. As shown in Figures 2 and 11, the foot-operated part 6 has a roughly rectangular prism-shaped base 61 and a pedal part 62. The base 61 and the pedal part 62 are integrally molded from a resin material. The foot-operated part 6 is connected to the rack 52 of the locking device body 50A by a connecting member 63.

[0035] As shown in Figure 11, a notch 343 is formed at the lower end of the meeting stile 34, where the lower end of the meeting stile extension 342 is cut out toward the interior and downward. The base 61 of the foot operating part 6 is inserted into the interior of the meeting stile extension 342 through the notch 343 so as to be vertically movable.

[0036] The pedal portion 62 is integrally provided at the lower end of the base portion 61, protruding toward the interior. The pedal portion 62 shown in this embodiment integrally includes a foot insertion portion 621 and a frame cover portion 622 that rises upward from the foot insertion portion 621.

[0037] As shown in Figures 4 and 11, the foot insertion section 621 has a top plate 621a, a bottom plate 621b, left and right side plates 621c, and a back plate 621d, and has a horizontally elongated box shape that opens towards the interior. The width of the foot insertion section 621 is greater than the width of the meeting stile 34.

[0038] The frame cover portion 622 is formed in a rectangular tube shape with the top and exterior sides open, and extends integrally upward from the top plate 621a of the foot insertion portion 621. When the base portion 61 is inserted into the interior of the meeting stile extension portion 342, the frame cover portion 622 is positioned to cover the interior facing surface 34a of the meeting stile 34 and the left and right facing surfaces 342a of the meeting stile extension portion 342.

[0039] Since the base portion 61 of the foot operating portion 6 is inserted into the meeting stile extension portion 342, when a lateral force is applied to the foot operating portion 6, a lateral pressing force can be applied to the meeting stile 34. In other words, the foot operating portion 6 is provided so that the inner sliding door 3 can be opened and closed by being pressed laterally with the operator's foot.

[0040] The connecting member 63 that connects the base 61 of the foot operating section 6 to the rack 52 of the locking device body 50A is made of a metal rod-shaped member. The upper end of the connecting member 63 is connected to the lower end of the rack 52, as shown in Figures 5 and 6. The lower end of the connecting member 63 passes through the base 61 and is supported by a nut 631 attached from below the base 61, as shown in Figure 11, to prevent the base 61 from falling out downwards.

[0041] The foot operation unit 6 of this embodiment further includes a latch member 64. The latch member 64 is a retaining member in this disclosure. The latch member 64 is attached to the lower end of the base 61 and to the outdoor side of the pedal unit 62. The latch member 64 is also commonly called a stag beetle latch or the like. As shown in Figure 12A, the latch member 64 includes a box-shaped latch member body 641, a pair of retaining arms 642 protruding downward from the lower end of the latch member body 641, and a push switch 643 positioned between the pair of retaining arms 642 to open and close the retaining arms 642.

[0042] As shown in Figure 2, a retained part 65 is positioned in the notch 343 of the meeting frame 34 below the foot operating part 6. The retained part 65 has a fixed part 651 and a spherical strike part 652 that protrudes from the upper surface of the fixed part 651. The fixed part 651 is fixed to the meeting frame body 341 which is exposed in the notch 343. When the foot operating part 6 moves downward toward the retained part 65, the push switch 643 of the latch member 64 is pressed by the strike part 652. When the push switch 643 is pressed, as shown in Figure 12B, a pair of retaining arms 642 close and hold the strike part 652 by gripping it. At this time, the foot operating part 6 is held in the lowered position. When the foot operating unit 6 moves downward again from the state in which the pair of holding arms 642 are holding the strike unit 652, and the push switch 643 is pressed again, the pair of holding arms 642 return to their open state and release the hold on the strike unit 652. At this time, the foot operating unit 6 can move upward.

[0043] Next, as shown in Figure 13, 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.

[0044] First, with the sliding window 1 fully closed, the operator OP inserts the toe FT of one foot into the pedal portion 62 of the foot operating unit 6 from the inside, as shown in Figures 13 and 14, and presses down firmly. The foot operating unit 6 moves smoothly downward, guided by the meeting stile extension portion 342 by the base portion 61, and moves the rack 52 of the locking device body 50A downward via the connecting member 63, extending the tension spring 522. As shown in Figure 6, when the rack 52 is positioned at the lower end of the movement stroke, the engagement between the arc-shaped engaging plate 571 and the engaging piece 58 of the receiving member 50B is released by the rotation of the hook 57, and the locking device 5 is unlocked.

[0045] Subsequently, as shown in Figure 13, the operator OP presses the foot control unit 6 laterally by moving their foot in the opening direction D1 while keeping their foot on the pedal unit 62, thereby opening the inner door 3. At this time, the latch member 64 holds the strike unit 652, so the foot control unit 6 is held in the lowered position. Therefore, even after the inner door 3 is opened, the unlocked state is maintained even if the operator OP removes their toe FT from the pedal unit 62.

[0046] When closing the inner sash 3, the operator OP inserts their toes FT into the pedal portion 62 of the foot operation unit 6 again from the indoor side and moves their foot toward the closing direction D2, thereby pressing the foot operation unit 6 laterally and closing the inner sash 3. When the inner sash 3 is fully closed, the trigger 56 contacts the meeting stile 44 of the outer sash 4 and retracts to its furthest point toward the indoor side. 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 becomes rotatable, but the latch member 64 holds the strike portion 652, so the foot operation unit 6 is held in the lowered position. Therefore, the rack 52 does not move upward regardless of the biasing force of the tension spring 522, and the locking device 5 remains unlocked.

[0047] After the inner sliding door 3 is fully closed, the operator OP presses the foot operating part 6 downwards with less force or lighter pressure than when unlocking, releasing the latch member 64 from holding the strike part 652. When the latch member 64 is released, the rack 52 moves upward due to the biasing force of the tension spring 522 and is positioned at the upper end of its 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 becomes locked.

[0048] The locking and unlocking of the inner sliding door 3 may be performed by the operator OP by manually operating the manual control unit 7.

[0049] The locking device 5 according to this embodiment provides the following effects.

[0050] (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 a door or window that locks and unlocks the inner sash 3, and comprises a locking device body 50A provided on the inner sash 3 and performing locking and unlocking operations by vertical movement of a rack 52 which is a movable member, a foot operating part 6 provided on the lower part of the indoor side facing surface 34a of the inner sash 3 so as to be vertically movable, and a connecting member 63 that connects the rack 52 and the foot operating part 6, wherein the foot operating part 6 is provided so as to be able to lock and unlock the locking device body 50A with the foot of the operator OP.

[0051] According to this design, the operator OP can operate the locking device 50A from inside the room using their foot. Even if the operator OP is carrying luggage in both hands or has limited use of their hands, they can operate the locking device 50A and perform locking and unlocking operations without using their hands. Moreover, since the opportunity to use hands when operating the locking device 50A is reduced, the risk of infection from bacteria and viruses transmitted through the hands is also reduced.

[0052] (2) In the locking device 5 for doors and windows described in (1) above, the foot operating part 6 is provided so that the inner sliding door 3 can be opened and closed by being pressed laterally with the foot of the operator OP.

[0053] According to this design, the operator (OP) can open and close the inner sliding door (3) by operating the foot control unit (6) from inside the room with their foot. Since hands are not required, the inner sliding door (3) can be opened and closed even by operators (OP) carrying luggage in both hands or operators with limited hand mobility. Furthermore, because hands are not required to open and close the inner sliding door (3), the risk of infection from bacteria and viruses transmitted through the hands is reduced.

[0054] (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 via the connecting member 63 when the foot operating part 6 is moved downward.

[0055] According to this design, the operator OP can unlock the locking device 5 with a simple, natural motion of just stepping downwards on the foot-operated part 6, making it very user-friendly.

[0056] (4) The locking device 5 for building fixtures described in (3) above further comprises a tension spring 522 that applies an upward biasing force to the rack 52, and a latch member 64 which is a holding member that holds the foot operating part 6 that has moved downward in a lower position and releases the hold when the foot operating part 6 is pressed downward again. The locking device body 50A maintains an unlocked state while the foot operating part 6 is held in a lower position by the latch member 64, and when the latch member 64 releases the hold of the foot operating part 6, the biasing force of the tension spring 522 moves the rack 52 upward to perform a locking operation.

[0057] According to this, even if the operator OP removes their foot from the foot control unit 6, the unlocked state of the locking device 5 is maintained. Moreover, when the locking device 5 is unlocked, the foot control unit 6 is held in a lowered position by the holding function of the latch member 64, so the unlocked state of the locking device 5 can be confirmed by the position of the foot control unit 6. Furthermore, when re-locking the locking device 5, simply pressing the foot control unit 6 lightly or slightly will move the rack 52 upwards due to the biasing force of the tension spring 522, allowing for easy locking.

[0058] 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.

[0059] In the above embodiment, the foot operation unit 6 is configured to perform both locking and unlocking operations by operation with the operator OP's foot, but is not limited to this. The foot operation unit 6 may be configured to perform only one of the locking or unlocking operations by operation with the operator OP's foot. Even if only one of the locking or unlocking operations is performed with the foot, the opportunity to use the hands to operate the lock device body 50A is reduced compared to when both locking and unlocking operations are performed by hand, thus reducing the risk of infection by bacteria or viruses through the hands.

[0060] In this embodiment, the locking device 5 is provided with a tension spring 522 that biases the rack 52 upward, but the tension spring 522 is not necessarily required. If the locking device 5 is not provided with a tension spring 522, the locking operation of the locking device 5 can be performed by the operator OP moving the foot operation unit 6 upward with their foot, or by the operator OP moving the hand operation unit 7 upward with their hand.

[0061] In this embodiment, a latch member 64 is provided on the foot operating unit 6, but the latch member 64 is not necessarily required. If the latch member 64 is not provided on the foot operating unit 6, when the inner sash 3 and outer sash 4 are fully closed, the trigger 56 retracts toward the interior, and the biasing force of the tension spring 522 automatically performs the locking operation. Therefore, the operator OP does not need to perform any operation to lock the door. If the tension spring 522 is not provided on the locking device 5, the locking operation of the locking device 5 is performed by the operator OP moving the foot operating unit 6 upward with their foot, or by the operator OP moving the hand operating unit 7 upward with their hand.

[0062] The foot operating section is not limited to the shape of the foot operating section 6 shown in this embodiment. The foot operating section may be formed such that the extension of the upper plate 621a of the foot insertion section 621 toward the indoor side is smaller than the extension of the lower plate 621b toward the indoor side, as shown in the foot operating section 6A in Figure 15, so that the foot insertion section 621 is also open to the upper side on the indoor side. This makes it easier to insert the toes into the foot insertion section 621 from above. The extension of the upper plate 621a of the foot insertion section 621 toward the indoor side may be even smaller, as shown in the foot operating section 6B in Figure 16.

[0063] The foot operating section does not necessarily have a lower plate 621b on the foot insertion section 621, as shown in Figure 17, for the foot operating section 6C. In this case, the stepping motion of the foot operating section 6C can be performed against the upper plate 621a.

[0064] The pedal portion of the foot-operated unit does not necessarily have to have a box-shaped foot insertion portion. Instead of a foot insertion portion, the pedal portion of the foot-operated unit may have a foot-operated member 623 made of a solid member that protrudes toward the interior, as shown in Figure 18, for example, the pedal portion 62 of the foot-operated unit 6D. This foot-operated member 623 is formed by a solid member having a substantially U-shaped cross-section that protrudes toward the interior. The foot-operated member 623 made of a solid member may be provided with a through hole 624 that penetrates laterally, as shown in Figure 19, for example, the foot-operated unit 6E. [Explanation of Symbols]

[0065] 1 Door / window, 2 Frame, 3 Interior sash, 34a Interior surface, 5 Locking mechanism, 52 Rack (moving member), 522 Tension spring (biasing member), 6 Foot operating part, 63 Connecting member, 64 Latch member, OP Operator, FT Toe (foot)

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, It has a first operating section and a second operating section for operating the locking device body, The first operating unit is, A foot-operated part is provided at the lower part of the interior-facing surface of the aforementioned shoji screen, which is movable vertically. The system includes a connecting member that connects the movable member and the foot operating part, The foot-operated section is provided so that the locking device body can be locked or unlocked, or both, by the operator's foot. The second operating unit described above is: The sliding door is provided with a hand-operated section that is positioned on the indoor-facing surface of the sliding door and connected to the movable member, The aforementioned manual operation unit is provided to allow the operator to lock or unlock the locking device body, or both, by the operator's hand, in a locking device for building fixtures.

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

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 foot operating part downward, thereby moving the movable member downward via the connecting member, or by moving the hand operating part downward, thereby moving the movable member downward.

4. A biasing member that applies an upward biasing force to the moving member, The device further includes a holding member that holds the foot operating part in the lower position when it moves downward, and releases the hold when the foot operating part is pressed downward again, The locking device for building fixtures according to claim 3, wherein the locking device body maintains an unlocked state while the foot operating part is held in a lower position by the holding member, and when the foot operating part is released from the holding member, the biasing force of the biasing member moves the moving member upward to perform a locking operation.

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