Locking / unlocking device and fitting

Abstract

To provide a locking / unlocking device and the like, which is unlocked by operation in the depth direction, capable of decreasing the width in the left and right direction.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 is guided by the frame to perform slide movement; and a lock member that is provided to the other of the frame and the shoji screen. The locking mechanism includes: a hook member that rotates on a first rotation axis along the depth direction capable of moving between a locked position where it engages with the lock member and an unlocked position where it is released from the engagement with the lock member; a stopper that rotates on an axis along the depth direction, which engages with the hook member at the locking 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 disengaging from the hook member by moving the stopper against the biasing force of the second biasing member when operated in the depth direction.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 are known (see, for example, Patent Document 1). In this locking and unlocking device, a locking piece having a hook shape with the tip side protruding in the indoor direction and pivotally attached to the vertical axis on the opposite side is provided on the vertical frame, and is locked to a hook-shaped receiving piece provided on the vertical frame and protruding in the outdoor direction to be locked. Then, from the locked state, by pressing the unlocking piece provided on the handrail of the vertical frame in the expected direction to rotate the locking piece, the locking piece is configured to be disengaged from the receiving piece and unlocked.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to hold the shoji screen so that it does not open, the hooked portions of the locking piece and the receiving piece need to have sufficient width for the protrusions to mesh with each other. And in order to disengage the locking piece that is locked with sufficient width from the receiving piece, it is necessary to press the unlocking piece and move the locking piece in the prospective direction by more than the meshing width. At this time, since the locking piece is pivotally attached and rotated about the vertical axis on the side opposite to the hooked portion, in order to greatly move the hooked portion of the locking piece in the prospective direction by the rotation of the locking piece, it is necessary to provide a wide space between the hooked portion of the locking piece and the pivotally attached portion. Thus, when the space between the hooked portion of the locking piece and the pivotally attached portion is widened, there is a problem that the width in the left-right direction of the vertical frame becomes wider and the design is impaired.

[0005] The present invention has been made in view of such problems, and an object thereof is to provide a locking and unlocking device that can be unlocked by an operation in the prospective direction and can suppress the width in the left-right direction, as well as a locking and unlocking device and a fitting.

Means for Solving the Problems

[0006] The main invention for achieving such an object is a locking mechanism provided on either the frame body forming the opening or the shoji screen that is guided by the frame body and slides, and a locking receiving member provided on the other of the frame body and the shoji screen. The locking mechanism has a hook member that rotates around a first rotation axis along the prospective direction and is movable between a locking position where it engages with the locking receiving member and an unlocking position where the engagement with the locking receiving member is released, a first biasing member that biases the hook member in the direction of the unlocking position, a stopper that rotates around an axis along the prospective direction and engages with the hook member in 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 operation portion that is operated in the prospective direction to move the stopper against the biasing force of the second biasing member and release the engagement with the hook member. The locking and unlocking device is characterized by having these components. Other features of the present invention will be clarified by the description in this specification and the accompanying drawings.

Advantages of the Invention

[0007] According to the present invention, it is possible to provide a locking and unlocking device that is unlocked by an operation in the prospective direction and can suppress the width in the left - right direction, as well as a fitting.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments 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 a locking and unlocking device 10 is provided in a 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 slidable. The frame body 2 is formed into 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, when the fitting 1 is viewed from the indoor side, the direction that is up and down is the vertical direction, the direction that is left and right is the horizontal direction, and the depth direction that is the indoor-outdoor direction is the prospective direction. For each part of the fitting 1 and the locking and unlocking device 10, and also for each member that makes up the fitting 1 and the locking and unlocking device 10 in a single state, the directions will be specified and described in the vertical direction, the horizontal direction, and the prospective direction in the attached state.

[0012] The locking and unlocking device 10 is provided on the door tip 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 description.

[0013] As shown in FIG. 2, the locking and unlocking device 10 has a locking mechanism 11 provided on the vertical frame (hereinafter referred to as the door tip frame) 3c (4c) on the door tip side, and a locking receiving member 12 provided on the vertical frame 2c that engages with the door tip 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 door end frame 3c, a hook member 14 rotatably supported by the locking and unlocking base 13, a first rotating shaft 15 that supports 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 rotatably supported by the locking and unlocking base 13, a second rotating shaft 18 that supports the stopper 17, a stopper spring (second biasing member) 19 formed of a torsion spring that biases the stopper 17, an operation unit 20 for performing an operation to release the regulation of the hook member 14 by the stopper 17, and a handle member 21 provided with a handle opening 21a through which the operation unit 20 is exposed.

[0015] As shown in FIG. 2(b), the door end frame 3c to which the locking mechanism 11 is attached has a frame hollow portion 3d extending in the vertical direction, and a frame recess 3e that is recessed on the calling side on the outer peripheral side of the frame hollow portion 3d, that is, on the side facing the vertical frame 2c. 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 recess 3e. A part of the operation unit 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 locking and unlocking base 13 includes a base plate portion 13a disposed at a position facing the finding wall portion 3g of the door end frame 3c with a space in the prospective direction, fixing portions 13b provided above and below the base plate portion 13a and screwed to the frame vertical wall portion 3f, and an extension wall portion 13c extending from the left edge of the base plate portion 13a to the indoor side.

[0017] The first 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 upper side of the base plate portion 13a. A hook member spring 16 disposed on the base plate portion 13a is inserted through an annular portion in the first rotating shaft 15, and the hook member 14 disposed 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 first pivot shaft 15 is inserted, and is rotatably provided about the first pivot 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 first pivot shaft 15.

[0019] The hook member 14 has a prospective recess 14b that is recessed on the indoor side and a protrusion 14c that protrudes on the outdoor side, that is, on the base plate portion 13a side. A hook member spring 16 is disposed in the prospective recess 14b. 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. The hook member 14 is biased counterclockwise about the first pivot shaft 15 by the hook member spring 16 when viewed from the indoor side.

[0020] As shown in FIG. 4(a), the protrusion 14c is configured to restrict the rotation of the hook member 14 biased counterclockwise by the hook member spring 16, so 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] The hook member 14 at the unlocking position has an overhanging portion 14d that protrudes to the right of the through hole 14a as shown in FIGS. 2 and 3. A locking recess 14e for locking a locked pin 27 (to be described later) of the locking member 12 is provided on the right side of the through hole 14a in the overhanging portion 14d, that is, on the right vertical frame 2c side. Further, the hook member 14 is provided with an engaging protrusion 14f that is located below the through hole 14a and protrudes downward to engage with the stopper 17 in the state of being located at the unlocking position.

[0022] The locking recess 14e in the hook member 14 located at the unlocking position is recessed from the lower right side to the upper left relative to the through hole 14a and is connected up to around the height of the through hole 14a. The first edge portion 14g located below the locking recess 14e extends below the second edge portion 14h located above the locking recess 14e.

[0023] As shown in FIGS. 2 and 3, the stopper 17 is provided with a through hole 17a through which the second rotating shaft 18 is inserted, and has two protruding portions 17b and 17c that protrude toward both sides in the diameter direction of the through hole 17a. The two protruding portions 17b and 17c are in a regulating position where the stopper 17 is supported by the second rotating shaft 18 and regulates the rotation of the hook member 14. One of them protrudes upward from the second rotating shaft 18, and the other protrudes downward from the second rotating shaft 18. Hereinafter, in the regulating position, the upper protruding portion 17b will be described as the upper protruding portion 17b, and the lower protruding portion will be described as the lower protruding portion 17c.

[0024] On the indoor side of the lower protruding portion 17c, a stopper inclined surface 17d is provided. As shown in FIG. 5, the stopper inclined surface 17d has an inclination in which the amount of protrusion toward the indoor side gradually increases from the left side to the right side.

[0025] The stopper 17 has a stopper recess 17e that is recessed on the indoor side, that is, on the side of the base plate portion 13a, on the outdoor side. A stopper spring 19 is disposed in the stopper recess 17e. One end of the stopper spring 19 is locked by the inner wall of the stopper recess 17e, and the other end of the stopper spring 19 is locked by the edge of the base plate portion 13a. The stopper 17 is urged clockwise as viewed from the indoor side about the second rotating shaft 18 by the stopper spring 19.

[0026] As shown in FIGS. 3 and 5, the operation portion 20 includes a pressing portion 22 that is pressed by the user, a release piece 23 that moves in the expected direction by the pressing portion 22 and rotates the stopper 17, a guide pin 24 that guides the movement of the release piece 23, and a release piece spring (third biasing member) 25 that is a compression coil spring for biasing the release piece 23.

[0027] The pressing portion 22 has a main body portion 22a that is vertically long and substantially rectangular parallelepiped-shaped and is exposed from the handle opening 21a of the handle member 21 and is pressed by the user, an overhanging piece 22b that protrudes in the outer peripheral direction from the edge on the outdoor side of the main body portion 22a and is larger than the handle opening 21a, and two protruding pieces 22c that protrude from the main body portion 22a to the outdoor side.

[0028] The release piece 23 has a substantially rectangular parallelepiped shape with a vertical length and is arranged on the outdoor side of the pressing part 22. The release piece 23 has a release piece inclined surface 23a provided on the outdoor side of the upper end part, and an insertion hole 23b provided below the release piece inclined surface 23a and penetrating in the prospective direction through which the guide pin 24 is inserted.

[0029] The release piece 23 is inserted together with the release piece spring 25 through the guide pin 24 provided to project in the prospective direction from the base plate part 13a, and is biased toward the indoor side by the release piece spring 25 provided in a compressed state between the release piece 23 and the base plate part 13a. The movement toward the indoor side is restricted by the enlarged diameter part 24a provided at the tip of the guide pin 24 on the indoor side. For this reason, the release piece 23 can move to the outdoor side against the biasing force of the release piece spring 25 when pressed, and returns to the position biased by the release piece spring 25 when the pressing force is released.

[0030] As shown in FIG. 5, the release piece inclined surface 23a has an inclination in which the amount of protrusion to the outdoor side gradually decreases from the left side to the right side. The release piece inclined surface 23a is arranged at a position facing the stopper inclined surface 17d of the stopper 17 in the prospective direction in a state where the release piece 23 is attached.

[0031] The handle member 21 is fitted into the frame opening 3h provided in the finding wall part 3g of the door end frame 3c, and has a handle recess 21b on which the user places a hand when opening and closing the inner shutter 3. As shown in FIG. 1, the handle recess 21b has a substantially rectangular shape that is long in the vertical direction, and a handle opening 21a is provided on the lower side through which the main body part 22a of the pressing part 22 is inserted and exposed.

[0032] The handle opening 21a is formed to be slightly larger than the main body part 22a of the pressing part 22 and slightly smaller than the overhanging piece 22b. For this reason, the main body part 22a is guided by the handle opening 21a and moves in the prospective direction, and the movement toward the indoor side is restricted when the overhanging piece 22b abuts against the handle member 21.

[0033] As shown in FIGS. 2 and 6, the lock receiving member 12 has a lock receiving base 26 fixed to the vertical frame 2c, and a locked pin 27 provided on the lock receiving base 26 as a locked member that engages with the hook member 14.

[0034] 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 extending in the vertical direction, and a frame concave portion 2e recessed on the outer peripheral side 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.

[0035] The lock receiving base 26 has a pair of base wall portions 26a facing each other with a space therebetween in the expected direction, a plate-like facing plate portion 26b that connects the right edges of the pair of base wall portions 26a and faces the vertical frame wall portion 2f, and base fixing portions 26c that extend from the upper and lower ends of the facing plate portion 26b and are fixed to the vertical frame wall portion 2f. The locked pin 27 is provided across the upper end sides of the pair of base wall portions 26a.

[0036] In the state where the inner shutter 3 is opened, as shown in FIGS. 4(a), 7(a), and 8(a), the hook member 14 of the locking mechanism 11 is urged counterclockwise as viewed from the indoor side by the hook member spring 16, and the protrusion 14c abuts against the edge of the base plate portion 13a and is located at the unlocking position where rotation is restricted. At this time, the stopper 17 is urged clockwise as viewed from the indoor side by the stopper spring 19, and the upper protruding portion 17b abuts against the left side of the engaging protrusion 14f that protrudes downward at the hook member 14 in the released position, and urges the engaging protrusion 14f clockwise as viewed from the indoor side.

[0037] Also, in the state where the inner shutter 3 is opened, the pressing portion 22 and the release piece 23 are urged by the release piece spring 25 and are located on the indoor side of the moving range of the pressing portion 22 and the release piece 23 in the expected direction. At this time, the stopper inclined surface 17d of the stopper 17 and the release piece inclined surface 23a of the release piece 23 face each other with a space therebetween in the expected direction. Here, the stopper inclined surface 17d and the release piece inclined surface 23a of the release piece 23 correspond to opposing portions that face each other in the expected direction.

[0038] When the inner plug 3 is in the open state, as shown in FIGS. 7(a) and 8(a), the locked pin 27 of the lock receiving member 12 faces the first edge 14g of the locking recess 14e that extends below the second edge 14h of the locking recess 14e in the hook member 14 in the left-right direction.

[0039] When closing the inner plug 3, the user places a hand on the pulling member 21 of the inner plug 3 and slides it in the closing direction of the inner plug 3, that is, in the right direction. When the inner plug 3 moves in the right direction, the locked pin 27 of the lock receiving member 12 abuts against the first edge 14g of the locking recess 14e that the hook member 14 has. Thereafter, when continuing to move in the closing direction of the inner plug 3, the locked pin 27 presses the first edge 14g of the locking recess 14e in the left direction, causing the hook member 14 to rotate clockwise and the locked pin 27 to move to the back side of the locking recess 14e.

[0040] When the inner plug 3 is closed, as shown in FIGS. 7(b) and 8(b), the hook member 14 is in the locked position, and the first edge 14g and the second edge 14h of the locking recess 14e are in a substantially vertical state. And the locked pin 27 is located between the first edge 14g and the second edge 14h of the locking recess 14e, and the second edge 14h is located on the right side of the locked pin 27.

[0041] When the hook member 14 rotates and moves to the locked position, the engaging protrusion 14f moves clockwise about the first rotation axis 15 to be in a substantially horizontal state, and the stopper 17 biased clockwise by the stopper spring 19 rotates, and the upper protruding portion 17b that was in contact with the engaging protrusion 14f moves below the engaging protrusion 14f.

[0042] At this time, the upward protruding portion 17b that has moved below the engaging protrusion 14f abuts against the overhanging portion 14d of the hook member 14 located on the right side, and while biasing the hook member 14 counterclockwise, the upward protruding portion 17b abuts below the engaging protrusion 14f, and by restricting the counterclockwise rotation of the hook member 14, the rotation of the hook member 14 is restricted and locked. Further, when the stopper 17 rotates, as shown in FIG. 5(a), the stopper inclined surface 17d and the release piece inclined surface 23a face each other at a distance in a substantially parallel state when viewed from above.

[0043] When opening the inner shutter 3, the user first presses the pressing portion 22 of the operation portion 20 toward the outdoor side. When the pressing portion 22 is pressed, as shown in FIGS. 9(a) and 10(a), the pressing portion 22 and the release piece 23 move toward the outdoor side against the biasing force of the release piece spring 25. At this time, the release piece inclined surface 23a presses the stopper inclined surface 17d toward the outdoor side.

[0044] The release piece inclined surface 23a has an inclination in which the left side protrudes more toward the outdoor side than the right side, and the stopper inclined surface 17d has an inclination in which the right side protrudes more toward the indoor side than the left side. Therefore, when the release piece inclined surface 23a presses the stopper inclined surface 17d, the release piece inclined surface 23a abuts against the stopper inclined surface 17d and further presses it toward the outdoor side. As a result, as shown in FIG. 5(b), a force that presses the downward protruding portion 17c having the stopper inclined surface 17d to the right acts.

[0045] The stopper 17, whose downward protruding portion 17c is pressed to the right, rotates counterclockwise, and the upward protruding portion 17b moves to the left side of the engaging protrusion 14f. As a result, the hook member 14 is in a state where its rotation is restricted by the locked pin 27.

[0046] Then, when the user presses the pressing portion 22 and slides the inner shutter 3 in the opening direction, that is, to the left, when the inner shutter 3 separates from the vertical frame 2c, the distance between the locked pin 27 and the first rotation axis 15 increases, and the position where the locked pin 27 abuts against the first edge portion 14g moves to the entrance side of the locking recess 14e while the hook member 14 rotates.

[0047] After that, as shown in FIGS. 9(b) and 10(b), the locked pin 27 comes out of the locking recess 14e, and the protrusion 14c abuts against the edge of the base plate portion 13a to restrict rotation, and the hook member 14 reaches the unlocked position. Then, when the user releases the hand from the pressing portion 22, the pressing portion 22 and the release piece 23 are pushed back toward the indoor side by the biasing force of the release piece spring 25.

[0048] According to the locking and unlocking device 10 of the present embodiment and the fitting 1 provided with this locking and unlocking device 10, the operation portion 20 that moves the stopper 17 to enable disengagement from the hook member 14 operates the pressing portion 22 in the expected direction. Therefore, for example, it is possible to make the width in the left-right direction narrower than that of an operation portion that is slid and operated in the left-right direction. Further, the locking mechanism 11 does not directly lock the inner shutter 3, but only restricts the rotation of the hook member 14 engaged with the locked pin 27 of the lock receiving member 12 by the stopper 17. Therefore, it is not necessary to provide a wide width for the engagement between the stopper 17 and the hook member 14. For this reason, since the rotation range of the stopper 17 can be made small, it is possible to make the width in the left-right direction of the locking mechanism 11 narrower.

[0049] Further, since the second rotation shaft 18 on which the stopper 17 is rotatably supported is located at a distance below the first rotation shaft 15 on which the hook member 14 is rotatably supported, the position where the hook member 14 and the stopper 17 engage can be arranged between the first rotation shaft 15 and the second rotation shaft 18. That is, since the hook member 14 and the stopper 17 can be arranged vertically and engaged with each other therebetween, it is possible to make the width in the left-right direction of the locking mechanism 11 narrower.

[0050] Further, by pressing the pressing portion 22 of the operation portion 20 toward the outdoor side, the release piece inclined surface 23a provided at the portion where the release piece 23 located on the outdoor side of the pressing portion 22 and the stopper 17 face each other presses the stopper inclined surface 17d, causing the stopper 17 to rotate. Thus, it is possible to rotate the stopper 17 by an operation in the expected direction. At this time, the release piece inclined surface 23a has an inclination where the left side protrudes more toward the outdoor side than the right side, and the stopper inclined surface 17d has an inclination where the right side protrudes more toward the indoor side than the left side. Therefore, it is possible to move the lower protruding portion 17c of the stopper 17 supported by the second rotation axis 18 along the expected direction to the right to rotate the stopper 17.

[0051] 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. However, 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. In the above embodiment, an example in which the operation portion 20 has the pressing portion 22 and the release piece 23 has been described. However, the pressing portion and the release piece may be a single member.

[0052] The above embodiment is for facilitating the understanding of the present invention and is not for limiting and interpreting the present invention. It goes without saying that the present invention can be changed and improved without departing from its gist, and equivalents thereof are included in the present invention.

[0053] The present embodiment includes at least the following inventions. Aspect 1: A locking mechanism provided on either one of a frame forming an opening and a shoji screen guided by the frame and slidingly moving, and a locking member provided on the other of the frame and the shoji screen. The locking mechanism rotates around a first rotation axis along the prospective direction, and is movable between a locking position where it engages with the locking member and an unlocking position where the engagement with the locking member is released. It includes a hook member, a first biasing member that biases the hook member in the direction of the unlocking position, a stopper that rotates around an axis along the prospective direction and engages with the hook member at the locking position to restrict the rotation of the hook member, and a second biasing member that biases the stopper toward the hook member side. It is characterized by having an operation portion that is operated in the prospective direction to move the stopper against the biasing force of the second biasing member and release the engagement with the hook member.

[0054] According to the locking and unlocking device of Aspect 1, since the operation portion for moving the stopper to release the engagement with the hook member is operated in the prospective direction, for example, it is possible to make the width in the left - right direction narrower than that of an operation portion that is slid and operated in the left - right direction. Also, the stopper does not release the engagement between the hook member holding the shoji screen and the locking member, but only restricts the rotation of the hook member engaged with the locking member by rotating, so high strength is not required, and it is not necessary to provide a wide width for the engagement between the stopper and the hook member. For this reason, the rotation range of the stopper can be made smaller, and the width of the locking mechanism in the left - right direction can be made narrower.

[0055] Aspect 2: The locking and unlocking device according to Aspect 1, wherein the stopper is positioned at an interval above or below the first rotation axis and is rotatably supported by a second rotation axis along the prospective direction, and the stopper rotates when the operation portion is operated to release the engagement with the hook member.

[0056] According to the unlocking and locking device of Mode 2, since the second rotation axis on which the stopper is rotatably supported is positioned at a distance from above or below the first rotation axis on which the hook member is rotatably supported, it is possible to arrange the position where the hook member and the stopper engage between the first rotation axis and the second rotation axis. That is, since the hook member and the stopper can be arranged vertically and engaged with each other therebetween, it is possible to make the width of the locking mechanism in the left-right direction narrower.

[0057] Mode 3: The unlocking and locking device according to Mode 2, wherein the stopper and the operation part each have an opposing part that faces each other in the prospective direction, and one of the opposing parts in the left-right direction has an inclined surface with a different protrusion amount in the prospective direction than the other, and by operating the operation part, the inclined surface on the operation part side presses the inclined surface on the stopper side to rotate the stopper.

[0058] According to the unlocking and locking device of Mode 3, by operating the operation part, the inclined surface provided on the opposing part of the operation part with the stopper presses the inclined surface provided on the opposing part of the stopper with the operation part to rotate the stopper, so it is possible to rotate the stopper by operating in the prospective direction. At this time, since the inclined surfaces of the operation part and the stopper are both inclined surfaces with different protrusion amounts in the prospective direction in the left-right direction, it is possible to move a part of the stopper supported by the second rotation axis along the prospective direction in the left-right direction to rotate the stopper.

[0059] Mode 4: A fitting characterized by having the unlocking and locking device according to any one of Modes 1 to 3.

[0060] According to the fitting of Mode 4, it is also possible to realize a fitting equipped with an unlocking and locking device with a narrower width in the left-right direction.

Explanation of Signs

[0061] 1 Fitting, 1a Window opening, 2 Frame body, 3 Inner shutter (shutter), 4 Outer shutter (shutter) 10 Unlocking device, 11 Locking mechanism, 12 Lock receiving member, 14 Hook member, 15 First rotating shaft, 16 Hook member spring (first biasing member), 17 Stopper, 17d Stopper inclined surface, 18 Second rotating shaft, 19 Stopper spring (second biasing member), 20 Operation part, 23a Release piece inclined surface, 27 Locked pin (locked member),

Claims

1. A locking and unlocking device having a locking mechanism provided on either one of a frame body forming an opening and a shoji that is guided by the frame body and slides, and a locking member provided on the other of the frame body and the shoji, The locking mechanism includes: A hook member that rotates around a first rotation axis along the expected direction and is movable between a locking position where it engages with the locking member and an unlocking position where the engagement with the locking member is released; A first biasing member that biases the hook member in the direction of the unlocking position; A stopper that rotates around an axis along the expected direction and engages with the hook member in the locking 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 in the expected direction to move the stopper against the biasing force of the second biasing member and release the engagement with the hook member. The locking and unlocking device is characterized by having the above components.

2. The locking and unlocking device according to Claim 1, The stopper is positioned above or below the first rotation axis with a space therebetween, and is rotatably supported by a second rotation axis along the expected direction. The stopper rotates when the operation portion is operated, and the engagement with the hook member is released. The locking and unlocking device is characterized by this.

3. The locking and unlocking device according to Claim 2, The stopper and the operation portion each have opposing portions that face each other in the expected direction. Each of the opposing portions has an inclined surface where one in the left - right direction has a different protrusion amount in the expected direction from the other. By operating the operation portion, the inclined surface on the operation - portion side presses the inclined surface on the stopper - side, causing the stopper to rotate. The locking and unlocking device is characterized by this.

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

Images