JP2021169706A - Lock - Google Patents

Abstract

To provide an improved lock in which there is no protrusion from a lock in a doorway when a door is open.SOLUTION: A lock 1 includes a case member 11 mounted on a sliding door 2. In the case member 11, a handle 20 is provided in front of a front face plate part 16, and a hook member 15 is provided between the front face plate part 16 and a rear face plate part 17. The hook member 15 can repeatedly advance into/retract from the case member 11, and is stored in the case member 11 by retracting under biasing of a spring. When the sliding door 2 is closed with respect to a fixed frame 3, the hook member 15 rotates towards an advancing direction by a predetermined angle and engages with a predetermined portion in the fixed frame 3 to put the sliding door 2 in a locked state. The handle 20 has a rotary shaft part extending towards the rear face plate part 17, and when the rotary shaft part is reciprocally rotated, the hook member 15 is reciprocally rotated via a link mechanism and a cam mechanism.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lock suitable for use by attaching to a door such as a sliding door.

Locks that are used by attaching to doors such as sliding doors are well known and well known.

For example, the imposition type sickle lock described in Patent Document 1 has a hook bolt that is housed so as to be able to advance into the door panel, and a trigger piece that is always advanced from the door panel. When the door panel is closed, the trigger piece abuts on the fixed frame, and the internal mechanism of the sickle lock is activated accordingly to advance the hook bolt and engage with the door frame to lock the door panel. In this sickle lock, the trigger piece is always protruding from the door panel.

Further, the sickle lock described in Patent Document 2 can be attached to, for example, the side end surface of a sliding door type door to lock the door with respect to the frame body constituting the doorway. A pin part protrudes from the sickle lock toward the frame body, and when the door is closed, the pin part comes into contact with the frame body. Along with the contact, the internal mechanism of the sickle lock is activated, the sickle member of the sickle lock advances, and the door is locked by engaging with a predetermined part of the frame body. Also in this sickle lock, the pin portion always protrudes from the sickle lock.

Japanese Unexamined Patent Publication No. 9-279921 Japanese Patent No. 4514076

In the prior art described in the above document, the trigger piece and the pin portion are always in a state of protruding from the sickle lock. That is, there is always a protrusion such as a trigger piece at the doorway when the door is open. At such entrances and exits, there is concern that clothes, belongings, etc. may come into contact with the protruding parts when a person passes by, leading to an unexpected accident.

Therefore, in the present invention, it is an object to provide an improved lock so that such a concern can be dispelled.

In order to solve the above problems, the object of the present invention is a lock that can be attached to a door that opens and closes with respect to a fixed frame.

The features of the present invention in such tablets are as follows. That is, the lock has a horizontal direction, a vertical direction, and a front-rear direction orthogonal to each other, and a case member attached to the door has a front plate portion and a rear surface plate portion in the front-rear direction, and the front plate portion. A locking member under spring tension is reciprocally swiveled between the rear surface plate portion and the rear surface plate portion, and is repeatedly housed in advancing and retracting with respect to the case member. On the other hand, when the door is closed, when the locking member advances against the spring urging and turns by a required angle, it engages with a required portion of the fixed frame to lock the door. On the other hand, when the door is retracted under the spring tension, it is housed in the case member and the door is unlocked. There is a handle in front of the front plate portion, and when the rotating shaft portion extending from the handle toward the rear surface plate portion reciprocates, the locking member moves reciprocatingly via the link mechanism and the cam mechanism. do. The link mechanism includes a first link member and a second link member, and the first link member extends radially outward of the rotating shaft portion with the rotating shaft portion of the handle as the first end portion. The extended tip portion is used as the second end portion, and the second link member is the first via a first support shaft which is in a rotatable state at the second end portion of the first link member. The first support shaft has a third end portion connected to the link member and a fourth end portion attached to the locking member via a second support shaft provided on the locking member. The first and second link members connected via the above form a V-shape that faces downward in the vertical direction. The first link member is formed with a groove portion extending between the first end portion and the second end portion, and in the groove portion, the first support shaft is rotatably inserted and the first support shaft is inserted. An urging means is interposed between the one support shaft and the first end portion, and the urging means urges the first support shaft in a direction away from the first end portion. The cam mechanism includes the first support shaft as a cam follower, and also includes a cam surface that regulates the locus of movement of the first support shaft by sliding the peripheral surface of the first support shaft. The cam surface includes a first cam surface located above the vertical direction and a second cam surface located below the first cam surface, and the first cam surface is the case by operating the handle. It defines the locus of the first support shaft when the locking member turns further beyond the required angle without engaging with the required portion of the fixed frame when turning so as to advance from the member. When the handle is released when the first support shaft is on the first cam surface, the locking member under the spring tension is housed in the case member. On the other hand, when the locking member turns by the required angle and engages with the required portion, when the operation of the handle is further continued, the first support shaft of the second link member becomes the urging means. By moving in a direction approaching the first end portion while compressing, the first cam surface moves away from the first cam surface and moves to the second cam surface, and the first support shaft slides on the first cam surface. In the process, the first link member and the second link member, which were in a connected state of drawing a downward V-shape, change to a connected state of drawing an upward V-shape in the process of sliding on the second cam surface. Even if the hand is released from the handle, the locking member engaged with the required portion is prevented from turning in the direction of being housed in the case member.

In an example of the embodiment of the present invention, the first cam surface is a convex curved surface located at a distance from the center of the rotating shaft portion, and the second cam surface has a distance from the center of the rotating shaft portion. It is a concave curved surface in the vicinity.

In another example of the embodiment of the present invention, the cam mechanism is formed on a plate member located inside the front plate portion.

In still another example of the embodiment of the present invention, the cam mechanism is formed on either the front plate portion or the rear surface plate portion.

In still another example of the embodiment of the present invention, when the handle is rotated in the unlocking direction, the first link member and the second link member, which are in a connected state in which the upward V-shape is drawn, are described. The first support shaft slides on the second cam surface and the first cam surface in order, and changes so as to draw the downward V-shape, and the locking member moves under the spring tension of the case. Retreat into the member.

In another example of the embodiment of the present invention, when the first link member and the second link member are in a connected state of drawing a downward V-shape, the lock is engaged when the hand is released from the handle. The entire stop member automatically retracts into the case member under the spring tension.

In still another example of the embodiment of the present invention, the rotating shaft portion of the lock is formed so that the operating tool can be attached to and detached from the side of the rear surface plate portion, and by using the operating tool, the latter is described. The lock can also be locked and unlocked from the side of the face plate portion.

In yet another example of an embodiment of the present invention, when the locking member engages with the required portion, it contacts a contact set on the side of the fixed frame and mechanically or electrically touches the contact. Activate the display function that connects to the target.

In yet another example of an embodiment of the present invention, the lock is a sickle lock for a sliding door.

In the lock according to the present invention formed in this way, when the door is not locked with respect to the fixed frame, for example, when the door is open, when the handle for operating the locking member is released, the lock is engaged. Since the stop member is housed in the case member under the force of a spring, clothes and belongings do not come into contact with the locking member and cause an accident when a person passes through the doorway.

The drawings show specific embodiments of the invention according to the present disclosure, including not only the essential configurations of the invention, but also selectively operable and preferred embodiments.
Perspective view of the unlocked lock. The figure which shows the internal structure of the lock when the front plate part is removed. The figure which shows the internal structure of a lock when a cam plate is removed. The same figure as FIG. 3 which shows by breaking a part. FIG. 2 is a view taken along the line VV of FIG. (A) is a view taken along the line VI (a) -VI (a) of FIG. 1, and (b) is a view taken along the line VI (b) -VI (b) of FIG. It is a figure which shows an example of the movement of the hook member which is a locking member by (a) and (b). It is a figure which shows the movement until the hook member is locked by (a)-(d). The figure which shows an example of the Embodiment by (a) and (b). FIG. 3 is a perspective view of a rear plate portion showing an example of the embodiment. The figure which shows an example of the Embodiment by (a) and (b).

The details of the lock according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing the front side of the lock 1 in a used state, in which the sliding door 2 to which the lock 1 is attached and the fixed frame 3 to which the sliding door 2 is openably and closably attached are half-opened. In the state, only some of them are shown. An example of such a sliding door 2 and a fixed frame 3 is for a private toilet in a railway vehicle or the like. The lock 1 is attached to the inner surface (indoor side surface) of the sliding door 2 so that the sliding door 2 can be locked and unlocked from the inside of the toilet. As shown in the figure, the lock 1 has a horizontal direction X, a vertical direction Y, and a front-rear direction Z that are orthogonal to each other.

In the lock 1, a hook member 15 or the like that serves as a locking member for the fixing frame 3 is housed inside the case member 11. The case member 11 includes a front plate portion 16 located in front of the case member 11 and a rear surface plate portion 17 located in the rear in parallel with each other, and a peripheral wall portion 18 integrated with the front plate portion 16 and a peripheral wall portion 19 integrated with the rear surface plate portion 17. Have. A portion of the peripheral wall portion 18 and the peripheral wall portion 19 that overlap each other is fixed by screws 6. A handle 20 is attached to the front portion of the front plate portion 16. The handle 20 is in a state in which a reciprocating rotary motion or a reciprocating swivel motion is possible as indicated by a double-headed arrow 21 between the “open” position and the “closed” position marked on the front plate portion 16. Whether it is a rotary motion or a swivel motion is determined by the shape of the handle 20, and the handle 20 in the illustrated example is a rotary motion. The peripheral wall portions 18 and 19 are notched at a portion facing the fixed frame 3, and an opening 22 is formed to allow the hook member 15 to move in and out. When the sliding door 2 is moved in the direction indicated by the arrow A in the lateral direction X, the side surface portion 2a is in contact with the side surface portion 3a of the fixed frame 3 and is closed, and when the sliding door 2 is moved in the direction indicated by the arrow B, the sliding door 2 is opened. Become in a state. When the sliding door 2 is in the closed state, when the handle 20 is put on the handle 20 and rotated in the "closed" direction, the hook member 15 advancing from the case member 11 turns by a required angle and becomes a keeper in the fixed frame 3. It will be in a state of being locked with respect to the engaging portion 100 described later. Further, when the hand 20 is rotated to the "closed" position, the handle 20 is stationary at the "closed" position, does not move even when the hand is released, and the sliding door 2 is locked. When the sliding door 2 is unlocked, a hand may be placed on the stationary handle 20 and the sliding door 2 may be rotated with a strong force in the "opening" direction.

FIG. 2 is a view showing the lock 1 when the front plate portion 16 in FIG. 1 is removed, and the illustration of the sliding door 2 and the fixed frame 3 is omitted. The handle 20 in FIG. 1 is rotatably attached to the front plate portion 16, and is removed together with the front plate portion 16 in FIG. 2. In the case member 11 of FIG. 2, the cam plate 25 located inside the front plate portion 16 is fixed to the front of the rear plate portion 17 via four fixing pins 23. The cam plate 25 is formed with a first through hole 26, a second through hole 27, and a third through hole 28, and a cam surface 30 described later is formed on a part of the peripheral edge of the first through hole 26. .. Further, inside the first through hole 26, a first support shaft 31 capable of sliding the cam surface 30 can be seen. The first rotation shaft portion 20a of the handle 20 (see FIGS. 6A and 6B) can be inserted into the second through hole 27, and the first rotation shaft thereof is inside the second through hole 27. The second rotating shaft portion 20b that fits into the portion 20a and rotates together with the first rotating shaft portion 20a is visible. Inside the third through hole 28, a machine screw 24 for attaching the lock 1 to the sliding door 2 is visible. The lock 1 is attached to the sliding door 2 in a manner of fixing the rear plate portion 17 to the inner surface 2b (see FIG. 1) of the sliding door 2.

The hook member 15 in FIG. 2 is clockwise in the figure by a torsion spring 33 wound around one of the four fixing pins 23 so that the entire hook member 15 is housed inside the case member 11. Is being urged to.

FIG. 3 is a perspective view showing the internal structure of the lock 1 when the cam plate 25 in FIG. 2 is removed. The lock 1 of FIG. 3 is also in a state of being removed from the sliding door 2 by loosening the machine screw 24 (see FIG. 2). In FIG. 3, the hook member 15 housed in the case member 11 makes a reciprocating swivel motion in the direction indicated by the double-headed arrow C with the fixing pin 23 as the swivel axis, and moves forward and backward with respect to the case member 11. And can be repeated. The hook member 15 is also urged by a torsion spring 33 attached to the fixing pin 23 in a retracting direction, that is, in a direction of being housed in the case member 11. The second rotating shaft portion 20b is rotatably attached to the rear surface plate portion 17, and the front end portion 29 thereof is the first rotating shaft portion 20a in the front plate portion 16 (see FIGS. 6A and 6B). It is made so that it can be fitted to and integrated with each other, and the peripheral surface includes a pair of flat surface portions 29a parallel to each other in order to enable the fitting.

In FIG. 3, a link mechanism is interposed between the second rotating shaft portion 20b and the hook member 15. The link mechanism includes a first link member 41 and a second link member 42. The first link member 41 extends from the second rotating shaft portion 20b, and the second link member 42 is formed on the first support shaft 31 and the hook member 15 located at the tip end portion of the first link member 41. It extends between the second support shaft 32 and the second support shaft 32. The first link member 41 is integrated with the second rotating shaft portion 20b and reciprocates around the second rotating shaft portion 20b. The second link member 42 is integrated with the first support shaft 31, and reciprocates around the first support shaft 31 at the tip portion 47 of the first link member 41. The second link member 42 is also capable of reciprocating swiveling motion by sliding on the peripheral surface of the second support shaft 32.

FIG. 4 is a diagram similar to FIG. 3 showing the details of the link mechanism by cutting out a part of the second link member 42. In FIG. 4, the retaining ring 43 (see FIG. 3) attached to the second rotating shaft portion 20b is also removed. A polygonal portion 44 is formed on the second rotation shaft portion 20b. By fitting the base end portion 46 into the polygonal portion 44 of the first link member 41, the first link member 41 can perform a reciprocating turning motion in association with the reciprocating rotational motion of the second rotating shaft portion 20b. A groove 48 is also formed in the first link member 41 between the base end portion 46 and the tip end portion 47. The groove portion 48 penetrates the first link member 41 in the thickness direction thereof and has no bottom portion. In the groove 48, the first support shaft 31 of the second link member 42 is inserted into the tip 47. Further, a compression spring 50 as an urging means is inserted between the first support shaft 31 and the base end portion 46 to urge the first support shaft 31 in a direction away from the base end portion 46. .. The compression spring 50 can be replaced with an elastic urging means such as a leaf spring.

FIG. 5 is a view taken along the line VV in FIG. The VV line extends so as to connect the center of the second rotation shaft portion 20b and the center of the first support shaft 31. The second rotating shaft portion 20b extending between the cam plate 25 and the rear surface plate portion 17 has a square groove 52 as an operating recess formed in a portion 20c extending from the rear surface plate portion 17. When a predetermined operating tool (not shown) is fitted into the square groove 52 on the rear surface side of the sliding door 2, the second rotating shaft portion 20b is also reciprocally rotated from the rear surface side of the sliding door 2 to lock the lock 1. Or it can be unlocked. The second rotating shaft portion 20b is rotatably attached to the rear surface plate portion 17 by using a flat washer 53 and a retaining ring 54. Between the cam plate 25 and the rear plate portion 17, the first link member 41 extends from the second rotation shaft portion 20b toward the first support shaft 31, and the compression spring 50 makes a second rotation inside the groove portion 48. It extends between the shaft portion 20b and the first support shaft 31. One end portion 50a of the compression spring 50 is located in the groove portion 56 (see FIG. 3) formed in the second rotating shaft portion 20b, and is attached to the second rotating shaft portion 20b so as not to come out of the groove portion 56. It is suppressed by the retaining ring 43. The other end 50b of the compression spring 50 may come out of the groove 48 of the first link member 41 by being pressed against the first support shaft 31 and sandwiched between two second link members 42 parallel to each other. No. A cap 58 is fitted on the top of the first support shaft 31, and the cap 58 slides on the cam surface 30. The two second link members 42 have the same shape and the same size but face each other, and are used so as to sandwich the hook member 15 and the first link member 41, respectively.

6 (a) and 6 (b) are VI (a) -VI (a) and VI (b) -VI (b) line arrow views of FIG. 1, showing the cross-sectional shape of a main part of the handle 20. Shown. In FIG. 6A, a columnar first rotating shaft portion 20a is attached to the handle 20 from the inside of the front plate portion 16 by using a male screw 7. In the first rotating shaft portion 20a, a fitting groove portion 20e is formed by a pair of wall surface portions 20d (see FIG. 6A) parallel to each other. When assembling the case member 11 of FIG. 1 with the front plate portion 16 and the rear plate portion 17 facing each other, the front end portion 29 (see FIG. 3) of the second rotating shaft portion 20b is inserted into the fitting groove portion 20e. The handle 20 and the second rotating shaft portion 20b are integrated, and the handle 20 enables the rotation of the second rotating shaft portion 20b.

7 (a) and 7 (b) are partial fracture views of FIG. 2 for showing an example of the movement of the hook member 15, and a part of the cam plate 25 is cut out. In FIG. 7A, the sliding door 2 and the fixed frame 3 are in a half-opened state as in FIG. However, the fixed frame 3 shows an engaging portion 100 which is used when locking the sliding door 2 and is a counterpart of the hook member 15. As described above, an example of the sliding door 2 and the fixed frame 3 is for a private room of a toilet. The lock 1 is attached to the sliding door of the private room from the inside of the private room, and is locked and unlocked by the user of the private room.

In FIG. 7A, the handle 20 is also in the “open” position (see FIG. 1). The hook member 15 is urged in the clockwise direction, that is, in the direction of retracting into the case member 11 and being retracted by the torsion spring 33 pressing the stopper pin 15c. Further, the first link member 41 and the second link member 42 are in a connected state in which a downward V-shape is drawn, in other words, in an intersecting state. The V-shape here means that the outer shape of the first link member 41 and the outer shape of the second link member 42 form a V-shape, but to be more precise, the first link member 41 The center line (not shown) of the first link member 41 connecting the center of rotation of the second connecting member 20b and the center of the first support shaft 31 of the second link member 42, and the first support of the second link member 42. It means a shape in which the center line (not shown) of the second link member 42 connecting the center of the shaft 31 and the center of the second support shaft 32 intersects at an acute angle and is drawn. In FIG. 7A, the first support shaft 31 of the second link member 42 is at the upper end portion 61 of the cam surface 30 (see FIG. 6B), does not move further upward, and is a hook member. The 15 does not turn further clockwise.

The cam surface 30 includes a first cam surface 30a having a large distance from the rotation center (not shown) of the second rotation shaft portion 20b, and a second cam surface 30b having a small distance from the center of rotation (not shown). As shown, the first cam surface 30a is a concave curved surface, and the second cam surface 30b is a convex curved surface. The first cam surface 30a includes an upper end portion 61 and a lower end portion 62, and the second cam surface 30b includes a lower end portion 63 (see FIG. 2). As will be described later, the first cam surface 30a regulates the trajectory of the turning motion of the first support shaft 41, and the second cam surface 30b regulates the turning motion of the first support shaft 41 after being separated from the first cam surface 30a. The trajectory is regulated.

7 (b) shows when the sliding door 2 is in the state of FIG. 7 (a), that is, when the handle 20 is in the state of FIG. 1, and the handle 20 is rotated in the “closed” direction. The state of the hook member 15 is shown. Since the sliding door 2 is in a half-opened state, when the handle 20 is rotated, the first support shaft 31 of the second link member 42 slides the first cam surface 30a of the cam surfaces 30 from the upper end portion 61 to the lower end portion 62. The handle 20 stops when it moves. Along with the sliding, the hook member 15 turns counterclockwise while resisting the urging of the torsion spring 33, and the required turning angle planned when engaging with the engaging portion 100 of the fixed frame 3 It turns further beyond the above, passes in front of the engaging portion 100, turns to the lower part of the engaging portion 100, becomes the state shown in the figure, and stops together with the handle 20. Even at this time, the first link member 41 and the second link member 42 form a downward V-shape as shown in the drawing. Then, when the hand is released from the handle 20, the hook member 15 returns to the state shown in FIG. 7A under the urging of the torsion spring 33. As described above, in the lock 1, not only the sliding door 2 is not locked when the sliding door 2 is half-opened, but also the hook member 15 is automatically attached to the case member 11 when the handle 20 is released. It is stored. In the preferred lock 1 in which the shape and size of the hook member 15 are arranged as illustrated in FIGS. 1 and 2, the entire hook member 15 is housed in the case member 11, and the hook member 15 protrudes from the case member 11. There is no such thing as a hooked state.

FIG. 8 is a diagram showing the movements of the sliding door 2 and the hook member 15 until the lock 1 in the state of FIG. 7A is locked by (a) to (d).

In FIG. 8A, the lock 1 is in the same state as the lock 1 in FIG. 7A, but the sliding door 2 is in a closed state with respect to the fixed frame 3. The handle 20 is in the "open" position as shown in FIG.

FIG. 8B shows a state when the handle 20 in FIG. 1 is started to be rotated toward the “closed” position. When the handle 20 is rotated in FIG. 8A, the first rotating shaft portion 20a (see FIG. 6) and the second rotating shaft portion 20b rotate, so that the first link member 41 turns counterclockwise. The second link member 42 turns clockwise along with the rotation, and the tip portion 15a of the hook member 15 enters the opening (not shown) formed in the fixed frame 3. The first support shaft 31 of the second link member 42 slides so as to descend the first cam surface 30a of the cam surfaces 30. The first link member 41 and the second link member 42 are in a connected state so as to draw a downward V-shape.

In FIG. 8B, when the handle 20 is further rotated toward the “closed” position, the hook member 15 has an engaging recess 15b formed in the tip portion 15a engaged with the engaging portion 100 in the fixed frame 3. The engagement is realized when the vehicle is swiveled to the required angle, and at the same time when the swivel movement is stopped, the sliding door 2 is in the locked state of FIG. 8 (c). At this time, the first support shaft 31 of the second link member 42 stops the movement of descending the first cam surface 30a in the middle of the first cam surface 30a, and compresses the compression spring 50 of the first link member 41. While moving away from the first cam surface 30a to the second cam surface 30b.

In FIG. 8D, by further rotating the handle 20, the first support shaft 31 of the second link member 42 in the state of FIG. 8C further lowers the second cam surface 30b, and the second cam It stops when it comes into contact with the lower end 63 (see FIG. 8B) of the surface 30b, and the rotation of the handle 20 also stops. The first link member 41 and the second link member 42 are shown in FIG. 2 while going from the state of FIG. 8 (a) to the state of FIGS. 8 (b) and 8 (c) to the state of FIG. 8 (d). The intersection angle, which was an acute angle, is changed to an obtuse angle of 180 degrees or more as shown in FIG. To change.

In the lock 1 in the state of FIG. 8D, since the handle 20 is in the "closed" position, when the handle 20 is operated so as to move toward the "open" position, the first link member 41 and the second link member are operated. The 42 and 42 move so as to return to the state shown in FIG. 8A, and the lock 1 is in the unlocked state. However, when the handle 20 of the lock 1 in the state of FIG. 8D starts to be rotated toward the “open” position, the first link member 41 and the second link member 42 are connected in an upward V shape. It must be reversed from the state to the connected state in which a downward V-shape is drawn, and at the time of the reversal, it is necessary to temporarily apply a strong rotational force to the handle 20. In other words, the handle 20 is braked so as to prevent the lock 1 from being unlocked very easily from the state shown in FIG. 8D, so that the rotation of the handle 20 can be suppressed. On the other hand, in the lock 1 in the state of FIG. 8D, without operating the handle 20, for example, a hand is placed on the hook member 15 and the hook member 15 is swiveled clockwise so as to be disengaged from the engaging portion 100. In an illegal operation for causing the hook member 15, that is, an illegal operation for directly lifting the hook member 15 upward in the drawing, the first link member 41 and the second link member 42, which form an upward V-shape, intersect each other. Since the handle 20 tries to move in the direction opposite to the "open" position by moving in the direction of further reducing the angle, the sliding door 2 cannot be unlocked.

The lock 1 of the illustrated example formed in this way is used for a sliding door and is sometimes called a sickle lock, but the use of the lock 1 and the shape of the hook member 15 as a locking member are as shown in the illustrated example. The lock according to the present invention is not limited to the one, and can be applied to a door that opens and closes by swiveling, a shutter that opens and closes by moving up and down, and the like.

Further, the rotating handle 20 in the illustrated example can be replaced with a rotating handle. There is no difference in any of the handles in operating the link mechanism by rotating the first rotation shaft portion 20a.

9 (a) and 9 (b) are a partially disassembled perspective view of the lock 101 showing an example of the embodiment of the present invention, and a perspective view of the front plate portion 116 used for the lock 101.

In FIG. 9A, the lock 101 has a front plate portion 116 in the front in the front-rear direction Z, a first rear plate portion 117a in the rear, and a second rear plate portion 117b in the rear. The front plate portion 116 and the first rear plate portion 117a form a lock unit 101a. In the lock unit 101a, the inner surface 171 (see FIG. 9B) of the front plate portion 116 has a rib structure for providing a cam surface 130 (see FIG. 9B) instead of the cam surface 30 of FIG. 172 is formed. In addition to the hook member 15 used in the lock 1, the first link member 41 and the second link member 42 are incorporated between the front plate portion 116 and the first rear plate portion 117a, but the cam plate 25 is not incorporated. The rib structure 172 is adopted in place of the cam plate 25. In the first rear surface plate portion 171a, a portion 20c extending rearward from the second rotation shaft portion 20b extends (see also FIG. 5). The second rear plate portion 117b is used as a bracket for attaching the lock unit 101a to the sliding door 2, and its shape is substantially the same as that of the rear plate portion 17 in FIG. In order to attach the lock unit 101a to the sliding door 2, first, the second rear plate portion 117b is attached to the sliding door 2 using the machine screw 24 illustrated in FIG. Next, the lock unit 101a is brought close to the second rear surface plate portion 117b, and the peripheral wall portion 119 of the second rear surface plate portion 117b enters the clearance 173 formed between the peripheral wall portion 118 and the first rear surface plate portion 117a. Let me. Since the peripheral wall portion 118 and the peripheral wall portion 119 are formed so that the screw holes overlap each other, the lock unit 101a is fixed to the second rear surface plate portion 117b by using the screw 6 illustrated in FIG. Thus, the lock 101 can be attached to the sliding door 2. The lock unit 101a can be attached to the sliding door 2 without passing through the second rear plate portion 117b, but when attached as shown in the illustrated example, an attachment screw is used from the front plate portion 116 toward the sliding door 2. It is not necessary to do so, and the appearance of the front plate portion 116 can be made smooth.

9 (b) is a perspective view of the front plate portion 116 in FIG. 9 (a), showing the inner surface of the front plate portion 116. On the inner surface, a first rotating shaft portion 20a connected to an operation handle (not shown), a rib structure 172, and four fixing pins 123 for attaching the first rear surface plate portion 117a can be seen. There is. A portion of the rib structure 172 provides a cam surface 130 equivalent to the cam surface 30 of FIG. Although not shown, the first support shaft 31 (see FIG. 2) of the second link member 42, which serves as a cam follower with respect to the cam surface 130, can slide the cam surface 130 in the rib structure 172. As shown above, its dimensions and shape have been changed. The front plate portion 116 of the illustrated example can be obtained, for example, by injection molding a thermoplastic synthetic resin.

FIG. 10 is also a perspective view showing an inner surface of a rear surface plate portion 217 prepared to show an example of an embodiment of the present invention. The rear plate portion 217 is used in place of the rear plate portion 17 in FIG. 1, and its shape and dimensions are the same as those of the rear plate portion 17. However, the rear plate portion 217 is formed with an annular rib structure 272 so as to be able to have the function of the cam plate 25 in the lock 1 of FIG. 1, and the cam in FIG. 2 is partially formed on the inner peripheral surface of the rib structure 272. A cam surface 230 is formed in place of the surface 30. In the present invention, the lock in the aspect of using the back plate portion 217 is different from the lock 1 in that the cam plate 25 in the lock 1 of FIG. 1 is not used. In such a lock, the second link member 42 in the lock 1 is also used, but the first support shaft 31 in the second link member 42 can be a cam follower with respect to the cam surface 230. The shape is adjusted.

As is clear from the embodiments of FIGS. 9 and 10, in the lock according to the present invention, instead of using the cam plate 25, the plate portion forming the front portion and the plate portion forming the rear surface portion of the case member 11 A cam mechanism can be formed on any one of the plates.

11 (a) and 11 (b) are also schematic views of the lock 1 showing an example of the embodiment of the present invention, but the lock 1 in the state shown in FIGS. 8 (a) and 8 (b) is shown. Has been done. In FIG. 11A, the sliding door 2 to which the lock 1 is attached is half-opened with respect to the fixed frame 3. A micro switch 310 is attached to the fixed frame 3 in addition to the engaging portion 100. An indicator lamp (not shown) is attached to the tip of the cord 311 extending from the micro switch 310. The indicator lamp can, for example, turn on the indication "in use". However, in FIG. 11A, the micro switch 310 is in the off state and the indicator lamp is not lit.

In FIG. 11B, the sliding door 2 is closed with respect to the fixed frame 3, the hook member 15 is in a state of being engaged with the engaging portion 100, and is in contact with the contact 312 of the micro switch 310. The switch 310 is in the on state, and the "in use" display is lit. Therefore, it is possible to recognize from the outside of the private room that the private room in which the sliding door 2 is closed is in a locked state from the inside and is in use. When the lock 1 is unlocked from the inside or the outside of the private room, the micro switch 310 is turned off and the "in use" display is turned off. In order to unlock the lock 1 from the outside of the private chamber, a square groove 52, which is an operation recess illustrated in FIG. 5, is used.

1 lock 2 doors (sliding door)
3 Fixed frame 11 Case member 15 Hook member 16 Front plate 17 Rear plate 20 Handle 20a Rotating shaft (first rotating shaft)
20b Rotating shaft (second rotating shaft)
25 Cam plate 30 Cam surface 30a 1st cam surface 30b 2nd cam surface 31 1st support shaft (3rd end)
32 2nd support shaft (4th end)
33 Torsion spring 41 1st link member 42 2nd link member 48 Groove 50 Compression spring 52 Operation recess (square groove)
100 Engagement 101 Lock 116 Front plate 117a First rear plate 117b Second rear plate 118 Peripheral wall 119 Peripheral wall 130 Cam surface 172 Rib structure 217 Rear plate 230 Cam surface 272 Rib structure 310 Micro switch 312 Contact X Horizontal direction Y Vertical direction Z Front-back direction

Claims (9)

A lock that can be attached to a door that opens and closes against a fixed frame.
The lock has a horizontal direction, a vertical direction, and a front-rear direction orthogonal to each other, and a case member attached to the door has a front plate portion and a rear surface plate portion in the front-rear direction, and the front plate portion and the front plate portion are described. A locking member under spring tension is reciprocally swiveled between the rear plate portion and reciprocally swiveled to repeatedly move in and out of the case member, and is housed in a repetitive manner with respect to the fixed frame. When the door is closed, when the locking member advances against the spring urging and turns by a required angle, it engages with a required portion of the fixed frame to lock the door. On the other hand, when it retracts under the spring tension, it is housed in the case member to unlock the door.
There is a handle in front of the front plate portion, and when the rotating shaft portion extending from the handle toward the rear surface plate portion reciprocates, the locking member moves reciprocatingly via the link mechanism and the cam mechanism. And
The link mechanism includes a first link member and a second link member, and the first link member extends radially outward of the rotating shaft portion with the rotating shaft portion of the handle as the first end portion. The extended tip portion is used as the second end portion, and the second link member is the first via a first support shaft which is in a rotatable state at the second end portion of the first link member. The first support shaft has a third end portion connected to the link member and a fourth end portion attached to the locking member via a second support shaft provided on the locking member. The first and second link members connected via the above form a V-shape that faces downward in the vertical direction.
The first link member is formed with a groove portion extending between the first end portion and the second end portion, and in the groove portion, the first support shaft is rotatably inserted and the first support shaft is inserted. An urging means is interposed between the one support shaft and the first end portion, and the urging means urges the first support shaft in a direction away from the first end portion.
The cam mechanism includes the first support shaft as a cam follower, and also includes a cam surface that slides the peripheral surface of the first support shaft to regulate the locus of movement of the first support shaft.
The cam surface includes a first cam surface located above the vertical direction and a second cam surface located below the first cam surface, and the first cam surface is the case by operating the handle. It defines the locus of the first support shaft when the locking member turns further beyond the required angle without engaging with the required portion of the fixed frame when turning so as to advance from the member. When the handle is released when the first support shaft is on the first cam surface, the locking member under the spring tension is housed in the case member. On the other hand, when the locking member turns by the required angle and engages with the required portion, when the operation of the handle is further continued, the first support shaft of the second link member becomes the urging means. By moving in a direction approaching the first end portion while compressing, the first cam surface moves away from the first cam surface and moves to the second cam surface, and the first support shaft slides on the first cam surface. In the process, the first link member and the second link member, which were in a connected state of drawing a downward V-shape, change to a connected state of drawing an upward V-shape in the process of sliding on the second cam surface. The lock for the door is characterized in that the locking member engaged with the required portion is prevented from turning in the direction of being housed in the case member even when the hand is released from the handle. .. The first cam surface is a convex curved surface located far from the center of the rotating shaft portion, and the second cam surface is a concave curved surface located close to the center of the rotating shaft portion. Item 1. The lock according to item 1. The lock according to claim 1 or 2, wherein the cam mechanism is formed on a plate member located inside the front plate portion. The lock according to claim 1 or 2, wherein the cam mechanism is formed on either the front plate portion or the rear surface plate portion. When the handle is rotated in the unlocking direction between the first link member and the second link member, which are in a connected state in which the upward V-shape is drawn, the first support shaft becomes the second cam surface and the second cam surface. Any of claims 1 to 4, wherein the locking member retracts into the case member under the spring tension by sliding with the first cam surface in order and changing so as to draw the downward V-shape. The lock described in the crab. When the first link member and the second link member are in a connected state in which the downward V-shape is drawn, the lock is such that when the handle is released, the entire locking member is under the spring tension. The lock according to any one of claims 1 to 5, which automatically retracts into the case member. The rotating shaft portion of the lock is formed so that an operation tool can be attached to and detached from the side of the rear surface plate portion, and by using the operation tool, the lock can be locked from the side of the rear surface plate portion as well. The lock according to any one of claims 1 to 6, which can be unlocked. When the locking member engages with the required portion, it comes into contact with a contact provided on the side of the fixed frame to activate a display function mechanically or electrically connected to the contact. The lock according to any one of 7. The lock according to any one of claims 1 to 8, wherein the lock is a sickle lock for a sliding door.

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