JP2023021831A - Hook lock for sliding door - Google Patents

Abstract

To provide a hook lock for a sliding door which prevents unlocking even when external force in the unlocking direction is applied to a sickle-shaped hook without using an operation member such as a thumb turn in the locked state in a way without requiring a receiving tool for exclusive use or increasing the number of components.SOLUTION: A hook lock for a sliding door has locking means comprising a locking part 60 formed in a box-shaped case 10 embedded in a sliding door 100 and a locked part 70 formed at a link member 50, and the locking means blocks a rotation of a hook 20 when external force in the unlocking direction is applied thereto by restricting a movement of the link member 50 by the locking of the locking part 60 and the locked part 70 in the locked state, and the locking of the locking part 60 and the locked part 70 is unlocked when a thumb turn hub 30 is rotated in the unlocking direction.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sickle lock for a sliding door, which is used by being attached to a sliding door and is locked by being hooked to a sickle-shaped hook receiving tool.

Conventionally, as a lock for locking a sliding door, an L-shaped bent hook protrudes from an opening formed in the front plate of a box-shaped case embedded in the sliding door, and is provided on the frame body that faces the opposite surface. A sickle lock for a sliding door, which is locked by being engaged with a receptacle, has been known for a long time, as disclosed, for example, in Japanese Patent Application Laid-Open No. 8-53966.

6 to 8 are diagrams showing an example of a sickle lock for sliding doors. As shown in these figures, the sickle lock for sliding doors 2 is installed in a box-shaped case 10 embedded in an end face 101 of a sliding door 100. , a sickle-shaped hook 20 having a hook 21 bent in an L-shape at its tip and arranged rotatably around a fixed support shaft 22, and a thumb-turn (not shown) being operated to center a rotary shaft 31. a thumb-turn hub 30 rotatably disposed in the center, a spring member 40 that biases the thumb-turn hub 30 in the locking direction in the locked state and in the unlocking direction in the unlocked state, the hook 20 and the thumb-turn hub 30. and a link member 50 that connects and interlocks.

When the sliding door sickle lock 2 is locked, the thumb-turn hub 30 is rotated counterclockwise in the figure by operating the thumb-turn, and the hook 20 is centered on the fixed support shaft 22 via the link member 50. , and the L-shaped bent hook 21 formed at the tip of the hook 20 protrudes from the opening 12 formed in the front plate 11, and the frame 200 corresponding to the opposing surface 201 The locking state is maintained by urging the thumb-turn hub 30 to the post-rotation position by the spring force of the spring member 40 (see FIG. 6).

When the sliding door sickle lock 2 is to be unlocked, the thumb-turn hub 30 is rotated clockwise from the locked state by operating the thumb-turn. 22 as a center, the hook portion 21 is buried inside the opening portion 12, the latching between the hook portion 21 and the receiver 202 is released, and the spring force of the spring member 40 is released. At , the unlocked state is maintained by urging the thumb-turn hub 30 to the post-rotation position (see FIG. 7).

However, since there is usually a gap of several millimeters between the sliding door 100 and the frame 200, as shown in FIG. When an external force is applied to the hook 21 in the unlocking direction (the downward direction indicated by the white arrow in FIG. 8), the external force is transmitted to the thumb-turn hub 30 via the link member 50, and the spring force of the spring member 40 causes the position to be adjusted. The thumb-turn hub 30 maintained (locked state) can no longer maintain its position and rotates counterclockwise in the figure, and the hook 20 rotates clockwise in the figure via the link member 50, There was a problem that unauthorized unlocking was possible without operating the thumb turn.

Here, as a method of solving the above problem by eliminating the above gap, for example, as in the invention described in Japanese Patent Application Laid-Open No. 2007-138642, a rod-shaped strike shaft is provided in the receiving tool and the hook is curved. There is also a means of eliminating the above gap by drawing the sliding door toward the receiver side when locking, but there is a problem that a special receiver is required. It is suitable for a sickle lock for a double sliding door, and when used for a sickle lock for a sliding door that locks at the end face of the sliding door, there is a risk that a gap will be easily created by applying force in the direction of opening the door. was there.

Furthermore, as a method of solving the above-mentioned problems even if there is the above-mentioned gap, for example, as in the inventions described in JP-A-2012-219467 and JP-A-2016-125293, the above-mentioned There is also a means of making it impossible to apply an external force to the hook by means of the deadbolt, even if there is the above gap when locking, by providing a reinforcing deadbolt that protrudes so as to cover the hook. There was a problem that the number of parts increased, causing an increase in size and weight, and an increase in cost.

JP-A-8-53966 JP 2007-138642 A JP 2012-219467 A JP 2016-125293 A

The present invention has been made to solve the above-mentioned problems, and is a method that does not require a special receiving tool or increase the number of parts. To provide a sickle lock for a sliding door which is not unlocked even when an external force is applied to a hook in an unlocking direction.

A sliding door that is locked when an L-shaped bent hook protrudes from an opening formed in a front plate of a box-shaped case embedded in the sliding door and engages with a catch provided on the opposite surface. A sickle lock,
A hook having the hook portion at its tip and rotatably supported in the case, a rotatably supported thumb-turn hub, and the hook and the thumb-turn hub being connected for movement. and a link member to be accommodated,
locking means comprising a locking portion formed in the case and a locked portion formed in the link member;
The locking means regulates the movement of the link member by locking the locking portion and the locked portion in the locked state, thereby preventing rotation when an external force is applied to the hook in the unlocking direction. Further, when the thumb-turn hub is rotated in the unlocking direction, the lock between the locking portion and the locked portion is released.

According to the sickle lock for a sliding door of the present invention, when an operating member such as a thumb-turn is operated in a locked state, the thumb-turn hub can be rotated in the unlocking direction to unlock without operating the operating member. When an external force in the unlocking direction is applied to the sickle-shaped hook from the gap between the sliding door and the frame, the movement of the link member is restricted by the locking between the locking portion and the locked portion. Thus, both the hook and the thumb-turn hub are prevented from rotating like a bar, so unlocking is prevented.

Further, if a spring member is housed in the case to urge the thumb-turn hub in the locking direction in the locked state and in the unlocking direction in the unlocked state, the locked state or the unlocked state can be reliably maintained, which is particularly desirable.

Further, the link member is formed of a plate, and protruding pins are provided at both ends of the link member, and the pins are inserted into the elongated holes formed in the hook and the round holes formed in the thumb-turn hub, respectively. In this case, since the hole formed in the hook into which the pin of the link member is inserted is an elongated hole, the pin can move within the elongated hole. When the operation member is operated to rotate the thumb-turn hub, the locking between the locking portion and the locked portion can be reliably released.

Further, when the locked portion is a stepped portion formed on one side of the link member, the locked portion can be provided with a simple structure, and when the link member is formed, It can be easily formed by molding or processing, and when locked, the locked part, which is a step, drops over the locking part to lock it simply and reliably. be able to.

Further, when the locked portion is formed to be inclined with respect to the length direction of the link member, the locking portion and the locking portion when the thumb-turn hub is rotated by operating an operation member such as a thumb-turn. Release of the engagement with the engaged portion can be made smoother and more reliable by being guided by the inclination.

Further, in the case where the engaging portion has an engaging surface that is formed to be inclined with respect to the length direction of the link member, the engaging surface when an operation member such as a thumb-turn is operated to rotate the thumb-turn hub may be The release of the locking between the stop portion and the locked portion can be made smoother and more reliable by being guided by the inclination of the locking surface.

Furthermore, when the locking portion has a locking angle that makes contact with the locked portion, the locking between the locking portion and the locked portion is due to point contact, and the force concentrates on one point. , when an external force is applied to the sickle-shaped hook in the unlocking direction, a strong resistance can be exhibited.

ADVANTAGE OF THE INVENTION According to the present invention, excellent cost saving can be exhibited with a simple structure without using a special receiving tool or additional parts, and the sliding door can be unlocked even if there is a gap between the sliding door and the frame. It is possible to provide a sickle lock for sliding doors without

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which showed the locked state in the sickle lock for sliding doors which is embodiment of this invention. FIG. 2 is an explanatory diagram of a main part in the embodiment shown in FIG. 1; FIG. 2 is a longitudinal sectional view showing an unlocked state in the embodiment shown in FIG. 1; FIG. 2 is a longitudinal sectional view showing a locking process in the embodiment shown in FIG. 1; FIG. 2 is a longitudinal sectional view showing an unlocking process in the embodiment shown in FIG. 1; FIG. 4 is a longitudinal sectional view showing a locked state in a conventional example of a sickle lock for sliding doors. FIG. 7 is a longitudinal sectional view showing an unlocked state in the conventional example shown in FIG. 6; FIG. 7 is a longitudinal sectional view showing a state in which an external force in an unlocking direction is directly applied to the hook by a tool without operating the thumb-turn from the locked state in the conventional example shown in FIG.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated, referring drawings. The same components as those of the conventional example shown in FIGS. 6 to 8 are denoted by the same reference numerals.

1 to 5 show longitudinal sectional views of sickle locks for sliding doors according to embodiments of the present invention.

As shown in these figures, the sliding door sickle lock 1 includes a case 10, a rotatably supported hook 20, a rotatably supported thumb-turn hub 30, and the thumb-turn hub 30 in the unlocking direction. Alternatively, it has a spring member 40 for biasing in the locking direction and a link member 50 for connecting and interlocking the hook 20 and the thumb-turn hub 30, and the overall construction and operation are shown in FIGS. Although this embodiment is almost the same as the conventional example, it differs in that it has a locking portion 60 and a locked portion 70 for restricting the movement of the link member 50 .

The case 10 comprises a front plate 11 having an opening 12 and attached so that the surface thereof is substantially flush with the end face 101 of the sliding door 100, and a box-shaped case body 13 integrally assembled with the front plate 11. Become. In this embodiment, the case main body 13 is positioned on the back side in FIG. The box body 14 and the lid body are fixed by means of fixing screws 16, 16 via struts 15, 15, respectively.

The hook 20 includes a hook portion 21 bent in an L-shape formed at the tip, a fixed support shaft 22 formed at the base end, and a long hole 23 formed apart from the fixed support shaft 22. , and is configured to be axially rotatable by inserting the fixed support shaft 22 into a shaft hole provided in the case body 13 .

The shape of the long hole 23 is formed in a direction extending along a line connecting the axial center of the fixed support shaft 22 and the line.

The thumb-turn hub 30 has a rotary shaft 31 formed with a square hole 32, a round hole 33 formed apart from the rotary shaft 31, and a spring holding portion 34 with a flange. is inserted into a shaft hole provided in the case main body 13 so as to be axially rotatable. By operating the member to rotate it, it rotates around the rotation shaft 31 .

The spring member 40 is installed so as to span between the support 15 fixed to the case body 11 and the spring holding portion 34 of the thumb-turn hub 30, and the thumb-turn hub 30 is moved in the locking direction by the spring force in the locked state. In the unlocked state, the thumb-turn hub 30 is urged in the unlocking direction. In this embodiment, a torsion spring is used, but other types of conventionally known springs may be used.

The link member 50 is composed of a flat plate 51 and two pins 52, 52 projecting in the same direction from a rear surface 53 at both ends of the plate 51. 23 and the thumb-turn hub 30 by inserting the pins 52 into round holes 33 formed in the thumb-turn hub 30 to connect the hook 20 and the thumb-turn hub 30, and the link member 50 moves to rotate the hook. 20 and the thumb-turn hub 30 are interlocked.

In this embodiment, the long hole 23 formed in the hook 20 is provided below the fixed support shaft 22, and the round hole 33 formed in the thumb-turn hub 30 is provided above the shaft hole 31. Therefore, when the link member 50 moves, the hook 20 and the thumb-turn hub 30 rotate in opposite directions.

The engaging portion 60 is composed of an engaging piece 61 having a rectangular vertical cross section and erected from the casing 14 side of the case body 13 . In the present embodiment, the notch 17 is formed in the box 14 and the locking piece 61 is raised by press working, so that the locking portion 60 can be configured without increasing the number of parts. For example, a separate locking piece may be attached by any processing means such as welding, brazing, adhesion, screwing, etc., and the shape is not limited to rectangular in vertical section, trapezoidal in vertical section, circular in vertical section, Any other shape, such as a semi-circular profile, is possible.

The locked portion 70 is composed of a stepped portion 72 formed on a bottom surface 71 that is one side of the plate 51 of the link member 50 .

The stepped portion 72 and the locking surface 62 of the locking piece 61 contacting the stepped portion 72 are formed at an obtuse angle α and an acute angle β with respect to the length direction L of the link member 50, respectively. (See Figure 2).

At this time, since the obtuse angle α of the formation angle of the stepped portion 72 and the acute angle β of the formation angle of the locking surface 62 are not the same with respect to the length direction L of the link member 50, the locking piece A locking angle 63 of 61 and the stepped portion 72 are in contact with each other.

Assuming that the engaging portion 60 and the engaged portion 70 are engaged by point contact between the stepped portion 72 and the engaging angle 63 of the engaging piece 61, force is concentrated on one point to form a sickle shape. When an external force is applied to the hook 20 in the unlocking direction, strong resistance can be exhibited.

As described above, in the locked state, the locking portion 60 and the locked portion 70 are locked, so that the sliding door 100 and the frame body can be connected without operating an operation member such as a thumb turn (not shown). When an external force in the unlocking direction is applied to the sickle-shaped hook 20 through the gap between the hook 200 and the hook 200, the movement of the link member 50 is restricted by the engagement between the engaging portion 60 and the engaged portion 70. As a result, both the hook 20 and the thumb-turn hub 30 are prevented from rotating like a bar, so that the lock is not unlocked.

At this time, even if the spring member 40 is not attached, the movement of the link member 50 is similarly restricted by the engagement between the engaging portion 60 and the engaged portion 70, and the movement of the link member 50 is restricted like a bar. In addition, the effect of preventing the rotation of both the hook 20 and the thumb-turn hub 30 is exhibited, and unlocking is prevented.

Reference numeral 80 denotes a lock mechanism. A cam 83 interlocking with a trigger 81 biased in a protruding direction by a trigger spring 82 regulates the rotation of the hook 20 when the door is opened with the trigger 81 protruding. Since it is a conventionally well-known trigger-type locking mechanism that prevents damage by preventing the portion 21 from protruding from the opening portion 12, detailed description thereof will be omitted.

Next, the movement at the time of locking and unlocking in this embodiment will be described based on FIGS. 1 to 5. FIG. The black arrows in FIGS. 4 and 5 indicate the direction of movement.

When locking the sickle lock 1 for sliding doors, the core rod (not shown) inserted through the square hole 32 is turned with a thumb-turn (not shown) or the like while the door is closed and the locking mechanism 80 is unlocked. When the thumb-turn hub 30 is rotated in the counterclockwise direction in the figure by operating the operation member of , the hook 20 rotates in the clockwise direction in the figure about the fixed support shaft 22 via the link member 50. A receiving tool provided on a frame body 200 which rotates and a hook part 21 bent in an L shape formed at the tip of the hook tool 20 protrudes from an opening part 12 formed in the front plate 11 and contacts an opposing surface 201. 202, and the spring force of the spring member 40 maintains the post-rotation position (locked state) of the thumb-turn hub 30, thereby locking it (see FIG. 1).

At this time, during the locking process, the plate 51 of the link member 50 and the locking piece 61 slide smoothly while being in contact with each other, so that the operation does not feel stuck (see FIG. 4). At this time, the pin 52 of the link member 50 inserted into the long hole 23 of the hook 20 has moved in the long hole 23 toward the fixed support shaft 22 (upward in FIG. 4).

Then, the movement of the link member 50 further progresses, and the locked portion 70, which is a stepped portion 72 formed on the plate 51 of the link member 50, rises from the box 14 side of the case 10. When the pin 52 of the link member 50 inserted into the long hole 23 of the hook 20 passes through the locking portion 60 which is the piece 61, the pin 52 of the link member 50 moves through the long hole 23 in the direction opposite to the fixed support shaft 22. (Downward in FIG. 1), the locked portion 70, which is a stepped portion 72, drops, and the locking portion 60 and the locked portion 70 are locked (see FIG. 1).

In the locked state shown in FIG. 1, the movement of the link member 50 in the longitudinal direction L is restricted by the engagement between the engaging portion 60 and the engaged portion 70 .

Therefore, even if an external force in the unlocking direction (downward in FIG. 1) is applied to the sickle-shaped hook 20 from the gap between the sliding door 100 and the frame 200 in this locked state by a tool such as a card or wire, By restricting the movement of the link member 50 in the longitudinal direction L, both the hook 20 and the thumb-turn hub 30 are prevented from rotating like a bar.

When unlocking the sickle lock 1 for sliding doors, the core rod (not shown) inserted through the square hole 32 is opened by the original unlocking operation using an operating member such as a thumb-turn (not shown). 30 is rotated in the clockwise direction shown in the figure from the locked state, the hook 20 rotates in the counterclockwise direction shown in the figure about the fixed support shaft 22 via the link member 50, and the hook portion 21 moves toward the opening. The latching between the hook portion 21 and the receiving tool 202 is released by being buried inside the portion 12, and the spring force of the spring member 40 maintains the post-rotation position (unlocked state) of the thumb-turn hub 30. is unlocked (see FIG. 3).

At this time, in the unlocking process, the locked portion 70, which is an inclined stepped portion 72 formed on the plate 51 of the link member 50, and the locking piece 61 having the inclined locking surface 62 come into contact with each other. While being guided by the slope in the same direction, the user smoothly rides over and the lock is released, so there is no feeling of being caught in the operation (see FIG. 5). At this time, the pin 52 of the link member 50 inserted into the long hole 23 of the hook 20 has moved in the long hole 23 in the direction of the fixed support shaft 22 (upper right direction in FIG. 5).

In this way, when the thumb-turn hub 30 is rotated by the original unlocking operation using an operation member such as a thumb-turn (not shown), the direction of movement is lifted in an arc, The locking between the locking portion 60 and the locked portion 70 is released so that the link member 50 can move freely, and the hole formed in the hook 20 is the long hole 23. Since the amount of movement increases, the locking can be released more reliably.

Further, in this embodiment, since the hole formed in the hook 20 is the elongated hole 23, if the locking piece 61, which is the locking portion 60, is not formed, the position of the above-mentioned link whose position is fixed would not be formed. Since the hook 20 in the unlocked state is movable within the length of the long hole 23 with respect to the position of the pin 52 of the member 50, the hook 20 will rattle when the sliding door is moved. It is conceivable that there is a possibility that troubles such as generating sound may occur.

However, by forming the locking piece 61 which is the locking portion 60 as in the present embodiment, the back surface of the hook 20 in the unlocked state as shown in FIG. Since it is supported by the stop surface 62, there is no risk of the hook 20 rattling when the sliding door is moved.

Thus, the locking piece 61 in this embodiment functions as the locking portion 60 for locking with the locked portion 70 and as a stopper for stabilizing the position of the hook 20 when unlocking. It fulfills both functions as

In this embodiment, the link member 50 is formed with protruding pins 52, 52, the hook 20 is formed with an elongated hole 23, the thumb-turn hub 30 is formed with a round hole 33, and the pin 52, 52 are to be inserted into the long hole 23 and the round hole 33, but by reversing the unevenness, holes are formed at both ends of the link member 50, and pins are attached to the hook 20 and the thumb-turn hub 30. It is also possible to protrude.

In the present embodiment, the link member 50 is formed with protruding pins 52, 52, the hook 20 is formed with an elongated hole 23, the thumb-turn hub 30 is formed with a round hole 33, and the pin The holes 52, 52 are inserted into the long hole 23 and the round hole 33, but the hole formed in the hook 20 can also be a round hole.

Furthermore, in the present embodiment, the locked portion 70 is formed at one location on the bottom surface 71, which is one side of the plate 51 of the link member 50. It may be formed on either the top surface or the bottom surface, or may be formed at a plurality of locations, depending on the position of the stop portion.

Furthermore, in the present embodiment, the locking angle 63 of the locking portion 60 and the stepped portion 72 of the locked portion 70 are locked by point contact, or the locking surface 62 of the locking portion 60 is locked. Although the locking is performed by contacting the surface of the stepped portion 72 of the locked portion 70 , the locking portion 60 may be a projection provided upright, or the locked portion 70 may be a bottom surface 71 . It may be a convex portion formed on the .

As described above, according to the present invention, it is possible to exhibit excellent cost savings with a simple structure without using a special receiving tool or additional parts, and even if there is a gap between the sliding door and the frame, the original To provide a sickle lock for a sliding door which is not unlocked carelessly without operation.

1 sickle lock for sliding door, 2 sickle lock for sliding door, 10 case, 11 front plate, 12 opening, 13 case body, 14 box, 15 support, 16 fixing screw, 17 notch, 20 hook, 21 hook, 22 fixed spindle, 23 long hole, 30 thumb turn hub, 31 rotating shaft, 32 square hole, 33 round hole, 34 spring holding part, 40 spring member, 50 link member, 51 plate, 52 pin, 53 back surface, 60 locking Part 61 Locking piece 62 Locking surface 63 Locking angle 70 Locked portion 71 Bottom surface 72 Stepped portion 80 Locking mechanism 81 Trigger 82 Trigger spring 83 Cam 100 Sliding door 101 End surface 200 frame, 201 facing surface, 202 receiver, L length direction of link member, α obtuse angle, β acute angle

Claims (7)

A sliding door that is locked when an L-shaped bent hook protrudes from an opening formed in a front plate of a box-shaped case embedded in the sliding door and engages with a catch provided on the opposite surface. A sickle lock,
A hook having the hook portion at its tip and rotatably supported in the case, a rotatably supported thumb-turn hub, and the hook and the thumb-turn hub being connected for movement. and a link member to be accommodated,
locking means comprising a locking portion formed in the case and a locked portion formed in the link member;
The locking means regulates the movement of the link member by locking the locking portion and the locked portion in the locked state, thereby preventing rotation when an external force is applied to the hook in the unlocking direction. A sickle lock for a sliding door, characterized in that the lock between the locking portion and the locked portion is released when the thumb-turn hub is rotated in the unlocking direction. 2. A sickle lock for a sliding door according to claim 1, wherein said case accommodates a spring member for urging said thumb-turn hub in a locking direction in a locked state and in an unlocking direction in an unlocked state. The link member comprises a plate and pins protruding from both ends of the plate, and the pins are inserted into a long hole formed in the hook and a round hole formed in the thumb-turn hub, respectively. The sickle lock for sliding doors according to claim 1 or 2, characterized in that: 4. A sickle lock for a sliding door according to claim 1, wherein said locked portion is a step formed on one side of said link member. 5. A sickle lock for a sliding door according to claim 1, 2, 3 or 4, wherein said locked portion is formed with an inclination with respect to the longitudinal direction of said link member. 6. A sickle lock for a sliding door according to claim 1, 2, 3, 4 or 5, wherein said locking portion has a locking surface formed to be inclined with respect to the longitudinal direction of said link member. . 7. A sickle lock for a sliding door according to claim 1, wherein said engaging portion has an engaging angle contacting said engaged portion.

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