Locking / unlocking device and fitting

Abstract

To provide a locking / unlocking device capable of locking a shoji screen by just closing, and a fitting.SOLUTION: The locking / unlocking device includes: a locking mechanism that is installed on either a frame that forms an opening or a shoji screen that slides along the frame; and a lock member that is provided on the other side of the frame and the shoji screen. The locking mechanism includes: a hook member that rotates on an axis along the depth direction so as to move between a locking position and an unlocking position; a first biasing member for biasing the hook member in the direction of the unlocked position; a stopper that engages with the hook member at the locked position to restrict the rotation of the hook member; a second biasing member for biasing the stopper toward the hook member; and an operation part that is capable of releasing the hook member from the engagement by moving the stopper against the biasing force of the second biasing member when operated. The lock member has a locked member that is rotated to the locking position and locks the hook member located at the unlocked position when the shoji screen is slid in the direction that closes the opening.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a locking and unlocking device and a fitting.

Background Art

[0002] Conventionally, a locking and unlocking device for locking provided on a shoji screen that is guided by a frame and slides, and a fitting equipped with this locking and unlocking device have been known (see, for example, Patent Document 1). In this locking and unlocking device, a locking and unlocking mechanism is provided on the vertical frame on the door tip side of a sliding door shoji screen, and a lock receiving portion is provided on the vertical frame. Then, after sliding the sliding door shoji screen and bringing the vertical frame into contact with the vertical frame, it is configured to be locked by moving the locking and unlocking operation portion provided on the sliding door shoji screen downward.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-described locking and unlocking device, since the locking and unlocking operation portion is moved in the vertical direction along the vertical frame to lock and unlock, although the finding width of the vertical frame can be narrowed, after closing the sliding door shoji screen, it cannot be locked unless the locking and unlocking operation portion is operated. For this reason, there has been a problem that an operation is required only for locking, the operation is complicated, and there is a risk of forgetting to lock.

[0005] The present invention has been made in view of such problems, and an object thereof is to provide a locking and unlocking device and a fitting that are locked only by closing the shoji screen.

Means for Solving the Problems

[0006] The main invention for achieving such an object has a locking mechanism provided on either one of a frame body forming an opening and a shoji screen guided by the frame body and slidingly moving, and a lock receiving member provided on the other of the frame body and the shoji screen. The locking mechanism includes a hook member that rotates around an axis along the prospective direction and is movable between a locking position and an unlocking position, a first biasing member that biases the hook member in the direction of the unlocking position, a stopper that engages with the hook member at the locking position to restrict the rotation of the hook member, a second biasing member that biases the stopper toward the hook member side, and an operating portion that is operated to move the stopper against the biasing force of the second biasing member to release the engagement with the hook member. The lock receiving member has a locked member that is locked by rotating the hook member at the unlocking position to the locking position by sliding movement of the shoji screen in the direction of closing the opening of the shoji screen. It is a locking and unlocking device characterized by this. Other features of the present invention will be clarified by the description in this specification and the accompanying drawings.

Effects of the Invention

[0007] According to the present invention, it becomes possible to provide a locking and unlocking device and a fitting that are locked only by closing the shoji screen.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0009] An embodiment of the locking and unlocking device of the present invention and a fitting having this locking and unlocking device will be described with reference to the drawings. In the present embodiment, as shown in FIG. 1, an example in which the locking and unlocking device 10 is provided in the fitting 1 for a sliding window will be described.

[0010] As shown in FIG. 1, the fitting 1 of the present embodiment has a frame body 2 that forms a window opening 1a, and an inner shutter 3 and an outer shutter 4 that are guided by the frame body 2 and are slidably movable. The frame body 2 is formed in a rectangular shape by framing an upper frame 2a, a lower frame 2b, and a pair of left and right vertical frames 2c. The inner shutter 3 and the outer shutter 4 each have a face material 5 such as glass, and a frame body 6 in which an upper frame 3a, 4a, a lower frame 3b, 4b, and left and right vertical frames 3c, 4c surrounding the face material 5 are framed.

[0011] In the following description, the direction that is vertical when the fitting 1 is viewed from the indoor side is shown as the vertical direction, the direction that is left and right is shown as the left and right direction, and the depth direction that is the indoor-outdoor direction is shown as the depth direction. Even for each part of the fitting 1 and the locking and unlocking device 10, and even when each member constituting the fitting 1 and the locking and unlocking device 10 is in a single state, the direction will be specified and described in the vertical direction, the left and right direction, and the depth direction in the attached state.

[0012] The locking and unlocking device 10 is provided on the leading end side of the inner shutter 3 and the outer shutter 4, respectively. Since the locking and unlocking device 10 provided on the inner shutter 3 side and the locking and unlocking device 10 provided on the outer shutter 4 side have the same structure except that the left and right are reversed, here, the locking and unlocking device 10 provided on the inner shutter 3 side shown on the right side of FIG. 1 will be taken as an example for explanation.

[0013] As shown in FIG. 2, the locking and unlocking device 10 has a locking mechanism 11 provided on the leading end vertical frame (hereinafter referred to as the leading end frame) 3c (4c) on the leading end side, and a locking receiving member 12 provided on the vertical frame 2c that engages with the leading end frame 3c (4c) when the shutter 3 (4) is closed.

[0014] As shown in FIGS. 2 and 3, the locking mechanism 11 includes a locking and unlocking base 13 fixed to the leading end frame 3c, a hook member 14 rotatably supported by the locking and unlocking base 13, a rotation shaft 15 of the hook member 14, a hook member spring (first biasing member) 16 formed of a torsion spring that biases the hook member 14, a stopper 17 movably supported in the vertical direction, a stopper guide pin 18 that guides the movement of the stopper 17, a stopper spring (second biasing member) 19 formed of a compression coil spring that biases the stopper 17, an operation portion 20 that operates the movement of the stopper 17, and a handle member 21 having a handle opening 21a through which the operation portion 20 is inserted.

[0015] The leading end frame 3c to which the locking mechanism 11 is attached has a frame hollow portion 3d extending in the vertical direction. As shown in FIG. 2(b), on the outer peripheral side of the frame hollow portion 3d, that is, on the side facing the vertical frame 2c, it has a frame concave portion 3e that is recessed on the calling side. The locking mechanism 11 is provided in the frame hollow portion 3d in a state where a part thereof protrudes from an opening provided in the frame vertical wall portion 3f that forms the boundary between the frame hollow portion 3d and the frame concave portion 3e. A part of the operation portion 20 is exposed to the indoor side from the handle opening 21a of the handle member 21 provided on the indoor side finding wall portion 3g that forms the frame hollow portion 3d.

[0016] The unlocking base 13 is arranged at a position facing the finding wall portion 3g of the door end frame 3c with a space in the prospective direction, and includes a base plate portion 13a, a fixing portion 13b provided above and below the base plate portion 13a and screwed to the frame vertical wall portion 3f, and an extending wall portion 13c extending from the left edge of the base plate portion 13a to the indoor side.

[0017] The rotating shaft 15 has an enlarged diameter portion 15a with one end enlarged in diameter, and the other end is fixed along the prospective direction on the lower side of the base plate portion 13a. A hook member spring 16 arranged on the base plate portion 13a is inserted through the annular portion of the rotating shaft 15, and a hook member 14 arranged on the indoor side of the hook member spring 16 is rotatably provided.

[0018] The hook member 14 is provided with a through hole 14a through which the rotating shaft 15 is inserted, and is rotatably provided around the rotating shaft 15 inserted through the through hole 14a. The hook member 14 is configured not to come off due to the enlarged diameter portion 15a of the rotating shaft 15.

[0019] The hook member 14 has a prospective recess 14b recessed toward the indoor side and a protrusion 14c protruding toward the outdoor side, that is, toward the base plate portion 13a side. A hook member spring 16 is arranged inside the hook member 14. One end of the hook member spring 16 is locked by the inner wall of the prospective recess 14b, and the other end of the hook member spring 16 is locked by the edge of the base plate portion 13a. And the hook member 14 is urged counterclockwise as viewed from the indoor side around the rotating shaft 15 by the hook member spring 16.

[0020] As shown in FIG. 4, the protrusion 14c restricts the rotation of the hook member 14 urged counterclockwise by the hook member spring 16, and is configured such that the hook member 14 is maintained in a predetermined posture. The position where the rotation of the hook member 14 is restricted by the protrusion 14c is the unlocking position where the unlocking device 10 is unlocked.

[0021] As shown in Fig. 3, the hook member 14 at the release position has an overhanging portion 14d that projects to the right of the through hole 14a. The upper end has an upper edge portion 14e that is substantially horizontal, and the upper edge portion 14e extends to the left of the through hole 14a, that is, to the side of the facing material 5. Also, the left end connected from the upper edge portion 14e forms a substantially vertical prospective surface above the rotation axis 15 and has a pressing surface 14f that presses the stopper 17 when the hook member 14 rotates to the locked position.

[0022] On the overhanging portion 14d, a locking recess 14g for locking a locking pin 23 (to be described later) of the lock receiving member 12 is provided on the right side of the through hole 14a, that is, on the side of the right vertical frame 2c.

[0023] The locking recess 14g in the hook member 14 located at the unlocking position is recessed from the lower right side to the upper left of the through hole 14a and extends up to around the height of the through hole 14a. Also, a first edge portion 14h located below the locking recess 14g extends below a second edge portion 14i located above the locking recess 14g.

[0024] As shown in Figs. 2 and 3, the stopper 17 has a substantially rectangular parallelepiped main body portion 17a that is long in the vertical direction and a protruding portion 17b that is provided on the upper side of the main body portion 17a and protrudes to the right. An upper end recess 17c that is recessed downward is provided at the upper end of the main body portion 17a. Also, a vertically long hole 17d that penetrates in the prospective direction and a fitting hole 17e into which a fitting piece 20c of the operating portion 20 is fitted are provided in the main body portion 17a.

[0025] The stopper 17 is configured such that a stopper guide pin 18 provided on the unlocking and locking base 13 along the prospective direction is inserted into the vertically long hole 17d and moves in the vertical direction. Also, the left side surface of the stopper 17 faces the extended wall portion 13c of the unlocking and locking base 13 with a slight gap, and when the stopper 17 moves up and down, it moves along the extended wall portion 13c. Also, the stopper guide pin 18 has an enlarged diameter portion 18a with an enlarged diameter at the indoor side end, and is configured such that the stopper 17 cannot come off due to the enlarged diameter portion 18a.

[0026] The lower end of the stopper spring 19 is received in the upper end recess 17c of the stopper 17, and the stopper spring 19 is compressed between the upper plate portion 13d that is connected to the fixing portion 13b above the locking and unlocking base 13 and forms a horizontal plane, biasing the stopper 17 downward.

[0027] The operating portion 20 has a gripping projection 20a that protrudes indoors for the operator to grip, a finding plate portion 20b that is integrally provided on the outdoor side of the gripping projection 20a, and a fitting piece 20c that protrudes outward from the finding plate portion 20b.

[0028] The finding plate portion 20b is flat and extends above and below the gripping projection 20a. The indoor surface of the portion of the finding plate portion 20b below the gripping projection 20a has a colored portion 20d colored, for example, red. The fitting piece 20c protrudes outward from the center of the gripping projection 20a in the vertical and horizontal directions, and its tip is fitted into the fitting hole 17e of the stopper 17. Therefore, by moving the gripping projection 20a in the vertical direction, the stopper 17 moves in the vertical direction.

[0029] The handle member 21 is fitted into the frame opening 3h provided in the finding wall portion 3g of the door end frame 3c and has a handle recess 21b for the user to hold when opening and closing the inner shutter 3. As shown in FIG. 5, the handle recess 21b has a substantially rectangular shape that is long in the vertical direction, and a handle opening 21a through which the gripping projection 20a is inserted is provided on the upper end side.

[0030] The pull-out opening 21a is formed slightly wider than the width of the gripping protrusion 20a and wider than the vertical width of the gripping protrusion 20a. For this reason, the gripping protrusion 20a is guided by the pull-out opening 21a and moves in the vertical direction. When the gripping protrusion 20a is located at the lower end of the pull-out opening 21a, as shown in FIG. 5(a), the uncolored part above the finding plate portion 20b is exposed from the pull-out opening 21a above the gripping protrusion 20a. When the gripping protrusion 20a is located at the upper end of the pull-out opening 21a, as shown in FIG. 5(b), the colored portion 20d below the finding plate portion 20b is exposed from the pull-out opening 21a below the gripping protrusion 20a.

[0031] As shown in FIGS. 2 and 6, the lock receiving member 12 includes a lock receiving base 22 fixed to the vertical frame 2c, a locked pin 23 as a locked member that is provided on the lock receiving base 22 and engages with the hook member 14, and a holding mechanism 24 for holding the stopper 17 at a predetermined position. The holding mechanism 24 includes a holding member 25 that is supported so as to be movable in the left-right direction, a holding member guide pin 26 that guides the movement of the holding member 25, and a holding member spring 27 that is a compression coil spring for biasing the holding member 25.

[0032] As shown in FIG. 2(b), the right vertical frame 2c to which the lock receiving member 12 is attached has a frame hollow portion 2d along the vertical direction, and a frame concave portion 2e that is recessed on the outer peripheral side is provided on the inner peripheral side of the frame hollow portion 2d. The lock receiving member 12 is provided on a vertical frame wall portion 2f that forms the boundary between the frame hollow portion 2d and the frame concave portion 2e.

[0033] The lock receiving base 22 has a pair of base wall portions 22a that face each other with a space therebetween in the prospective direction, a plate-like facing plate portion 22b that connects the right edges of the pair of base wall portions 22a and faces the vertical frame wall portion 2f, and base fixing portions 22c that extend from the upper and lower ends of the facing plate portion 22b and are fixed to the vertical frame wall portion 2f. The locked pin 23 is provided so as to span the lower end sides of the pair of base wall portions 22a, and two holding member guide pins 26 are provided so as to span the upper end sides of the pair of base wall portions 22a with a space therebetween in the left-right direction.

[0034] The holding member 25 has a substantially rectangular parallelepiped-shaped holding main body portion 25a that is long in the left-right direction, and a right-end concave portion 25b that is recessed to the left is provided at the right end of the holding main body portion 25a. Further, the holding main body portion 25a is provided with a horizontally long hole 25c that is long in the left-right direction and penetrates in the prospective direction.

[0035] For the holding member 25, two holding member guide pins 26 are inserted through the horizontally long hole 25c and configured to move in the left-right direction. The left end of the holding member spring 27 is housed in the right-end concave portion 25b of the holding member 25, and the holding member spring 27 is compressed between the opposed plate portions 22b to bias the holding member 25 in the left direction.

[0036] In the state where the inner lock 3 is open, as shown in FIGS. 4(a) and 7(a), the hook member 14 of the locking mechanism 11 is biased counterclockwise by the hook member spring 16, and the protrusion 14c abuts against the edge of the base plate portion 13a to be in the unlocked position where rotation is restricted. At this time, the stopper 17 is biased downward by the stopper spring 19, and the lower end abuts against the horizontal upper edge portion 14e of the hook member 14 and is located on the upper side within the vertical movement range.

[0037] And since the fitting piece 20c is fitted into the fitting hole 17e of the stopper 17 and the operation portion 20 that moves integrally with the stopper 17 has moved upward as shown in FIG. 5(b), the gripping protrusion 20a of the operation portion 20 is located on the upper end side of the handle opening 21a of the handle member 21. For this reason, a colored portion below the gripping protrusion 20a of the viewing plate portion 20b is exposed below the gripping protrusion 20a of the handle opening 21a, and it is possible to visually recognize that it is in the unlocked state.

[0038] Also, in the state where the inner lock 3 is open, as shown in FIG. 7(a), the locked pin 23 of the lock receiving member 12 faces the first edge portion 14h of the locking concave portion 14g that extends below the second edge portion 14i of the locking concave portion 14g in the hook member 14 in the left-right direction, and the protruding portion 17b of the stopper 17 faces the holding member 25 in the left-right direction.

[0039] When closing the inner shutter 3, the user places a hand on the pulling member 21 of the inner shutter 3 and slides it in the closing direction of the inner shutter 3, that is, in the right direction. When the inner shutter 3 moves in the right direction, as shown in FIG. 7(b), the locked pin 23 of the lock receiving member 12 abuts against the first edge 14h of the locking recess 14g of the hook member 14. Thereafter, as shown in FIG. 7(c), when the inner shutter 3 continues to move in the closing direction, the locked pin 23 presses the first edge 14h of the locking recess 14g in the left direction, causing the hook member 14 to rotate clockwise, and the locked pin 23 moves to the back side of the locking recess 14g.

[0040] When the inner shutter 3 is closed, the hook member 14 is in the locked position, and the first edge 14h and the second edge 14i of the locking recess 14g are in a substantially vertical state. And the locked pin 23 is located between the first edge 14h and the second edge 14i of the locking recess 14g, and the second edge 14i is located on the right side of the locked pin 23. At this time, the holding member 25 biased leftward by the holding member spring 27 presses the protruding portion 17b of the stopper 17 in a state where the holding member spring 27 is compressed.

[0041] When the hook member 14 is in the locked position, the pressing surface 14f becomes substantially vertical, and the stopper 17 that was biased downward by the stopper spring 19 and abutted against the hook member 14 moves downward and is disposed on the left side of the pressing surface 14f of the hook member 14. As a result, the hook member 14 cannot rotate counterclockwise. Here, the position where the stopper 17 has moved downward corresponds to the regulation position for regulating the rotation of the hook member 14.

[0042] When the stopper 17 moves downward, the operation portion 20 also moves downward. As shown in FIG. 5(a), the gripping protrusion 20a moves to the lower end side of the handle opening 21a of the pulling member 21. At this time, an uncolored portion above the gripping protrusion 20a in the viewing plate portion 20b is exposed above the gripping protrusion 20a of the handle opening 21a of the pulling member 21, and it is possible to visually recognize that it is in the locked state.

[0043] When opening the phacoemulsifier 3, first, as shown in FIG. 5(b), the user moves the gripping projection 20a of the operation unit 20 upward. By this operation, as shown in FIG. 8(a), the stopper 17 is pulled upward, and the holding member 25 that was pressing the protruding portion 17b of the stopper 17 moves leftward and enters below the protruding portion 17b and abuts against the main body portion 17a. As a result, the stopper 17 is maintained in the pulled-up state. Further, when the gripping projection 20a is moved upward, as shown in FIG. 5(b), a colored portion below the gripping projection 20a of the finder plate portion 20b and below the gripping projection 20a of the handle opening 21a is exposed, indicating that it is in the unlocked state.

[0044] Also, when the stopper 17 is pulled upward, the lower end of the stopper 17 is disposed at a position higher than the pressing surface 14f of the hook member 14. As a result, the hook member 14 becomes rotatable counterclockwise. Here, the position where the stopper 17 is pulled upward corresponds to the regulation release position for releasing the regulation of the rotation of the hook member 14.

[0045] When the stopper 17 is pulled upward, the hook member 14 rotates by the biasing force of the hook member spring 16, and the first edge portion 14h of the locking recess 14g abuts against the locked pin 23. At this time, the rotation of the hook member 14 is restricted by the locked pin 23.

[0046] Then, when the user slides the phacoemulsifier 3 in the opening direction, that is, leftward, as shown in FIG. 8(b), when the phacoemulsifier 3 separates from the vertical frame 2c, the distance between the locked pin 23 and the rotation shaft 15 increases, and the position where the locked pin 23 abuts against the first edge portion 14h moves toward the entrance side of the locking recess 14g while the hook member 14 rotates. Thereafter, the locked pin 23 exits the locking recess 14g, and the protrusion 14c abuts against the edge of the base plate portion 13a, restricting rotation, and the hook member 14 reaches the unlocked position.

[0047] According to the locking and unlocking device 10 of the present embodiment and the fitting 1 equipped with this locking and unlocking device 10, the locked pin 23 of the lock receiving member 12 provided on the vertical frame 2c rotates the hook member 14 at the release position to the locking position by sliding in the direction of closing the inner shutter 3. At this time, since the pressing surface 14f of the hook member 14 rotated to the locking position moves to the right side of the main body portion 17a of the stopper 17, the stopper 17 biased toward the hook member 14 by the stopper spring 19 moves downward, and the rotation of the hook member 14 is restricted by the main body portion 17a.

[0048] Therefore, it becomes possible to lock the inner shutter 3 only by sliding it in the direction of closing the window opening 1a. Further, since the stopper 17 is biased toward the hook member 14 by the stopper spring 19, it is possible to maintain the locked state until the operation unit 20 is operated to move the stopper 17 against the biasing force of the stopper spring 19.

[0049] And it becomes possible to open the window opening 1a only by sliding the inner shutter 3 after operating the operation unit 20 upward. At this time, since the operation direction of the operation unit 20 is the vertical direction along the door end frame 3c, for example, even if the operation unit 20 is provided on the vertical frame 3c or the vertical frame 2c of the inner shutter 3, it is possible to keep the finding width narrow.

[0050] In addition, in the holding mechanism 24 of the lock receiving member 12, the holding member 25 biased by the holding member spring 27 and abutting against the protruding portion 17b of the stopper 17 moves surely by the biasing force of the holding member spring 27 when the stopper 17 is released from the restricted position by the operation of the operation unit 20. As a result, since the holding member 25 moves to the lower side of the protruding portion 17b, the stopper 17 cannot move to the restricted position. Therefore, the holding member 25 moved to the release position by operating the operation unit 20 maintains the state of being moved to the release position. For this reason, since the stopper 17 does not move to the restricted position even if the hand is released from the operation unit 20, it becomes possible to open the inner shutter 3 with one hand by releasing the hand from the operation unit 20.

[0051] Further, since the operation unit 20 has a colored portion 20d as a display unit that indicates the locked state or the unlocked state by operation, without performing a special operation for indicating the locked state or the unlocked state, by simply engaging or disengaging the stopper 17 and the hook member 14 by operating the operation unit 20, it becomes possible to visually recognize the state after the operation.

[0052] In the above embodiment, an example in which the locking and unlocking device 10 includes a holding mechanism 24 that holds the stopper 17 at a position where the engagement with the hook member 14 is released has been described, but the present invention is not limited to this. When the holding mechanism is not provided, for example, it is possible to open the shoji by sliding the shoji while holding the state in which the gripping protrusion of the operation unit is moved with one hand at a position where the stopper and the hook member do not engage.

[0053] In the above embodiment, an example in which the locking mechanism 11 is provided in the door end frame 3c and the lock receiving member 12 is provided in the vertical frame 2c has been described, but the present invention is not limited to this, and the locking mechanism 11 may be provided in the vertical frame 2c and the lock receiving member 12 may be provided in the door end frame 3c.

[0054] Also, in the above embodiment, an example in which the unlocked state is achieved when the gripping protrusion 20a is moved upward and the locked state is achieved when it is moved downward has been described, but by providing the locking and unlocking device 10 upside down, it is also possible to set the locked state when it is moved upward and the unlocked state when it is moved downward.

[0055] Also, as an example of the display unit, an example in which the colored portion 20d in the finder plate portion 20b of the operation unit 20 is in a state of being exposed from the pull handle opening 21a is set as the unlocked state has been described, but the colored portion 20d may be in a state of being exposed from the pull handle opening 21a as the locked state. Further, the display is not limited to coloring. For example, as long as the part that is exposed when the gripping protrusion 20a is operated, such as the characters "locked" and "unlocked" being exposed from the pull handle opening 21a, is different between the locked state and the unlocked state, it may be acceptable.

[0056] In the above-described embodiment, an example in which the operation direction of the operation unit 20 is the vertical direction has been described. However, the present invention is not limited to this. For example, the position of the pressing surface of the hook member may be changed and the arrangement of the stopper and the holding mechanism may be changed so that the operation unit is operated in the left-right direction to lock and unlock.

[0057] The above-described embodiment is for facilitating the understanding of the present invention and is not for limiting the interpretation of the present invention. The present invention can be changed and improved without departing from the gist thereof, and it goes without saying that equivalents thereof are included in the present invention.

[0058] The present embodiment includes at least the following inventions. Aspect 1: A locking mechanism provided on either one of a frame body forming an opening and a shoji screen that is guided by the frame body and slides, and a lock receiving member provided on the other of the frame body and the shoji screen, wherein the locking mechanism includes: a hook member that rotates about an axis along a prospective direction and is movable between a locking position and an unlocking position; a first biasing member that biases the hook member in the direction of the unlocking position; a stopper that engages with the hook member at the locking position to restrict rotation of the hook member; a second biasing member that biases the stopper toward the hook member; and an operation unit that is operated to move the stopper against the biasing force of the second biasing member to release the engagement with the hook member, and the lock receiving member has a locked member that is locked by rotating the hook member at the unlocking position to the locking position by sliding movement of the shoji screen in a direction to close the opening of the shoji screen. A locking and unlocking device characterized by this.

[0059] According to the locking and unlocking device of Aspect 1, the locked member included in the lock receiving member provided on the other of the frame body and the shoji screen rotates the hook member at the unlocking position to the locking position by sliding movement in a direction to close the opening of the shoji screen and is locked. At this time, the hook member rotated to the locking position engages with the stopper biased toward the hook member by the second biasing member, and the rotation of the hook member is restricted. Therefore, it is possible to lock the shoji screen only by sliding it in a direction to close the opening.

[0060] Further, since the stopper is biased toward the hook member by the second biasing member, it is possible to maintain the locked state until the operation unit is operated to move the stopper against the biasing force of the second biasing member. Further, it is possible to open the opening simply by operating the operation unit to slide the shoji door.

[0061] Aspect 2: The locking and unlocking device according to Aspect 1, wherein the lock receiving member has a holding mechanism that holds the stopper at a position where the engagement with the hook member is released.

[0062] According to the locking and unlocking device of Aspect 2, since the lock receiving member has a holding mechanism that holds the stopper at a position where the engagement with the hook member is released, when the operation unit is operated and the stopper is moved to a position where the engagement with the hook member is released, the stopper is held at that position. Therefore, since the stopper does not engage with the hook portion even when the hand is released from the operation unit, it is possible to open the shoji door with one hand while releasing the hand from the operation unit.

[0063] Aspect 3: The locking and unlocking device according to Aspect 2, wherein the stopper is movable between a restricting position that restricts the rotation of the hook member and a restricting release position that releases the restriction, and the holding mechanism includes a holding member that engages with the stopper and a third biasing member that biases the holding member toward the stopper side. The holding member is biased in the direction of the stopper by the third biasing member, abuts against the stopper in a state where the shoji door is closed, and moves by the biasing force of the third biasing member when the stopper is moved to the restricting release position by the operation of the operation unit, thereby restricting the movement of the stopper to the restricting position.

[0064] According to the locking and unlocking device of Aspect 3, the holding member that is urged by the third urging member and abuts against the stopper at the restricting position moves by the urging force of the third urging member when the stopper reaches the restriction release position by the operation of the operation unit, and engages with the stopper to prevent the stopper from moving to the restricting position. Therefore, it is possible to reliably hold the state in which the stopper has been moved to the restriction release position by operating the operation unit.

[0065] Aspect 4: A locking and unlocking device according to any one of Aspects 1 to 3, wherein the operation unit has a display unit that indicates a locked state or an unlocked state by an operation.

[0066] According to the locking and unlocking device of Aspect 4, since the operation unit has a display unit that indicates a locked or unlocked state by an operation, it is possible to visually recognize the state after the operation only by operating the operation unit to release the engagement between the stopper and the hook member without performing a special operation for indicating the locked or unlocked state.

[0067] Aspect 5: A fitting characterized by having the locking and unlocking device according to any one of Aspects 1 to 4.

[0068] According to the fitting of Aspect 5, it is also possible to realize a fitting that can be locked only by sliding the shoji in the direction in which the opening closes.

Explanation of Signs

[0069] 1 Fitting, 1a Window opening (opening), 2 Frame body, 3 Inner shoji (shoji), 4 Outer shoji (shoji), 10 Locking and unlocking device, 11 Locking mechanism, 12 Lock receiving member, 13 Locking and unlocking base, 14 Hook member, 16 Hook member spring (first urging member), 17 Stopper, 19 Stopper spring (second urging member), 20 Operation unit, 20d Colored portion (display unit), 23 Locked pin (locked member), 24 Holding mechanism, 25 Holding member, 27 Holding member spring (third biasing member),

Claims

1. It has a locking mechanism provided on either one of a frame body forming an opening and a shoji screen that is guided by the frame body and slides, and a locking member provided on the other of the frame body and the shoji screen, The locking mechanism is, A hook member that rotates around an axis along the expected direction and is movable between a locked position and an unlocked position, A first biasing member that biases the hook member in the direction of the unlocked position, A stopper that engages with the hook member in the locked position to restrict the rotation of the hook member, A second biasing member that biases the stopper toward the hook member, An operation portion that is operated to move the stopper against the biasing force of the second biasing member to release the engagement with the hook member, and has, The locking member has a locked member that rotates and locks the hook member in the locked position by sliding the shoji screen in the direction of closing the opening of the shoji screen. A locking and unlocking device characterized by this.

2. The locking and unlocking device according to claim 1, The locking member has a holding mechanism that holds the stopper at a position where the engagement with the hook member is released. A locking and unlocking device characterized by this.

3. The locking and unlocking device according to claim 2, The stopper is movable between a restricting position that restricts the rotation of the hook member and a restricting release position that releases the restriction, The holding mechanism has a holding member that engages with the stopper and a third biasing member that biases the holding member toward the stopper, The holding member is biased in the direction of the stopper by the third biasing member and abuts against the stopper when the shoji screen is closed, The unlocking and locking device is characterized in that, by operating the operation unit, the stopper moves to the regulation release position and then moves by the biasing force of the third biasing member, thereby regulating the movement of the stopper to the regulation position.

4. The unlocking and locking device according to claim 1 or claim 2, wherein the operation unit has a display unit that indicates a locked state or an unlocked state by operation.

5. A fitting characterized by including the unlocking and locking device according to claim 1 or claim 2.

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