Sliding door lock

Abstract

To provide a lock for a sliding door having a simple structure and high safety against illegal unlocking.SOLUTION: A sliding door lock includes: a lock body 1 having an operation member 2 which can be rotated from the outside of a sliding door, and a projection piece 31 which is inserted into a slit 8; a guard latch 3 sharing the operation member 2 and a rotation shaft 22 to co-rotate therewith; a hook member 4 provided inside the guard latch 3, sharing the operation member 2, the guard latch 3, and the rotation shaft 22 to rotate through a specified angle relative to the operation member 2 and the guard latch 3; a locking mechanism 5 operable from the outside of a sliding door and regulating the operation member 2 and the guard latch 3 to rotate; and a link mechanism 7 causing the operation member 2 and the guard latch 3 to link with the hook member 4, the hook member 4 being provided with an operation part 44 for rotating the hook member 4 from the inside of the sliding door.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a lock for a sliding door, and more particularly to a lock for a sliding door that is provided on a sliding door of a storage room or the like that has an internal space through which people can enter and exit. [Background technology]

[0002] When you are working in a storage shed, for example, a child may lock it from the outside as a prank (temporarily or permanently), or someone else may accidentally lock the shed without realizing that there is someone inside, such as a child playing hide-and-seek. In such cases, to enable people trapped inside the storage shed to escape on their own, locks have been proposed that can be unlocked (temporarily or permanently) from inside the shed (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-209577 [Patent Document 2] JP 2016-61095 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the locks that can be unlocked from inside the storage shed have a complicated structure and are too expensive to be used in a storage shed.

[0005] In view of the problems associated with locks that can be unlocked from inside the storage shed, the present invention aims to provide a lock for a sliding door that is simple in structure and highly secure against unauthorized unlocking. [Means for solving the problem]

[0006] In order to achieve the above object, the sliding door lock of the present invention is a sliding door lock that locks by hooking a sickle portion of a sickle member of a lock body provided on the sliding door onto the edge of a slit provided in the door frame, The lock body comprises an operating member that can be rotated from the outside of the sliding door, a guard latch that has a protruding piece that is inserted into a slit and rotates together with the operating member on a common rotation axis, a sickle member that is provided inside the guard latch and that shares a common rotation axis with the operating member and the guard latch and rotates freely at a predetermined angle relative to the operating member and the guard latch, a locking mechanism that can be operated from the outside of the sliding door and that restricts the rotation of the operating member and the guard latch, and an interlocking mechanism that interlocks the operating member, the guard latch, and the sickle member, The sickle member has an operating portion that allows the sickle member to be rotated from the inside of the sliding door.

[0007] In this case, the interlocking mechanism may be configured by disposing a friction resistance member that generates friction resistance between the guard latch and the sickle member.

[0008] The tip surface of the sickle portion of the sickle member may be formed into an inclined surface or a curved surface. [Effects of the Invention]

[0009] According to the sliding door lock of the present invention, the protruding piece of the guard latch prevents unauthorized operation of the sickle member, thereby ensuring safety in terms of crime prevention, and by rotating the operating part of the sickle member from inside the sliding door, it is possible to easily unlock from inside the storeroom, etc., and it has a simple structure and is easy to use. It can be said that

[0010] Furthermore, by providing the interlocking mechanism with a friction resistance member that generates friction resistance between the guard latch and the sickle member, the interlocking of the operating member and the guard latch with the sickle member can be performed smoothly.

[0011] Furthermore, by forming the tip surface of the sickle portion of the sickle member into an inclined or curved surface, even if the sliding door is accidentally closed when the sickle portion of the sickle member is in the locked position, the tip surface of the sickle portion formed into an inclined or curved surface will slide along the edge of the slit, causing the sickle member to rotate, absorbing the impact and preventing damage to the sliding door lock, storage, etc. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 shows a component diagram of one embodiment of a sliding door lock of the present invention, where (a1) is a side view of the lock body, (a2) is a rear view of the same, (b1) is a front view of the operating member, (b2) is a plan view of the same, (b3) is a rear view of the same, (c1) is a cross-sectional view of the guard latch, (c2) is a rear view of the same, (d1) is a cross-sectional view of the sickle member, (d2) is a rear view of the same, (e1) is a plan view of the cylinder lock of the locking mechanism, (e2) is a front view of the same, and (f) is a rear view of the cam of the locking mechanism. [Figure 2] The sliding door lock is shown in (a) is a front view in the unlocked state, (b) is a side view, (c) is a rear view (the sickle member and the cam of the locking mechanism are omitted), and (d) is a rear view in the locked state (the sickle member and the cam of the locking mechanism are omitted). [Figure 3] 1 shows the same sliding door lock, where (a) is a rear view when it is in the locked state, (b) is a rear view when it is unlocked by rotating the operating part of the sickle member from inside the sliding door in the locked state, and (c) is a rear view when the sliding door is closed with the sickle part of the sickle member in the locked position. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of a sliding door lock of the present invention will be described with reference to the drawings.

[0014] 1 to 3 show an embodiment of a sliding door lock according to the present invention. This sliding door lock is locked by engaging the sickle portion 41 of the sickle member 4 of the lock body 1 attached to the sliding door with the edge portion 81 of the slit 8 provided in the door frame. The lock body 1 is equipped with an operating member 2 that can be rotated from outside the sliding door, a guard latch 3 that has a protruding piece 31 that is inserted into the slit 8 and rotates together with the operating member 2 on a rotating shaft 22, a sickle member 4 that is attached to the inside of the guard latch 3 and shares a rotating shaft 22 with the operating member 2 and the guard latch 3, and rotates freely by a predetermined angle relative to the operating member 2 and the guard latch 3, a locking mechanism 5 that can be operated from outside the sliding door and restricts the rotation of the operating member 2 and the guard latch 3, and an interlocking mechanism 7 that interlocks the operating member 2 and the guard latch 3 with the sickle member 4, and the sickle member 4 has an operating portion 44 that allows it to be rotated from inside the sliding door.

[0015] The lock body 1 is made of synthetic resin and consists of a case member into which the components are assembled and which can be fitted and directly attached into an attachment hole (not shown) formed in the sliding door, and has an accommodating section 11 for the operating member 2, an accommodating section 12 for the cylinder lock as the locking mechanism 5, and an insertion hole 13 for the rotating shaft 22. Here, the insertion hole 13 is formed in a shape that allows the rotation shaft 22, that is, the operating member 2, to rotate within a range of approximately 90°.

[0016] The operating member 2 is made of a synthetic resin member and has a knob portion 21 and a rotation shaft 22. Here, the rotation shaft 22 is inserted into the insertion hole 13 of the lock body 1, and is formed into a shape that allows the operating member 2 to rotate within a range of approximately 90°.

[0017] The guard latch 3 is made of a metal member such as iron, and has a protruding piece 31 that is inserted into a slit 8 provided in the door frame, a fitting hole 32 into which the rotating shaft 22 is fitted, a small hole 33 that accommodates the steel ball of the interlocking mechanism 7, and a recess 34 into which the cam 6 of the locking mechanism 5 is fitted. Here, the guard latch 3 has the rotation shaft 22 fitted into the fitting hole 32, so that the guard latch 3 rotates together with the operating member 2, sharing the rotation shaft 22.

[0018] The sickle member 4 is made of a metal member such as iron, and has a sickle portion 41 that locks by hooking onto the edge 81 of the slit 8 provided in the door frame, a loose-fitting hole 42 into which the rotating shaft 22 fits loosely, a recess 43 into which the steel ball of the interlocking mechanism 7 fits, and an operating portion 44 that allows the sickle member 4 to be rotated from the inside of the sliding door. Here, the sickle member 4 shares the rotation axis 22 with the operating member 2 by loosely fitting the rotation axis 22 into the loose fitting hole 42, and can freely rotate at a predetermined angle, approximately 90° in this embodiment, relative to the operating member 2 and the guard latch 3. Further, the tip surface 41a of the sickle portion 41 is formed into an inclined surface (or a curved surface). In addition, the operating part 44 is exposed from the lock body 1 made of a case member when the sickle part 41 is in a locked state with the sickle part 41 hooked on the edge part 81 of the slit 8 provided in the door frame, so that the sickle part 4 can be rotated from the inside of the sliding door.

[0019] The locking mechanism 5 is made up of a cylinder lock, and is fitted into the receiving portion 12 of the lock body 1 so as to be operable from the outside of the sliding door. The locking mechanism 5 transmits the rotation of the rotating part of the cylinder lock, which is operated by a key (not shown), to a cam 6 made of a metal member such as iron, which has a long hole 61 into which a protrusion 51 formed eccentrically on the rotating part is inserted, causing the cam 6 to fit into the recess 34 of the guard latch 3, thereby regulating the rotation of the operating member 2 and the guard latch 3, thereby locking the door. The locking mechanism 5 may be any locking mechanism other than a cylinder lock.

[0020] The interlocking mechanism 7 interlocks the operating member 2 and the guard latch 3 with the sickle member 4 by fitting the steel ball housed in the small hole 33 of the guard latch 3 into the recess 43 of the sickle member 4. Here, by forming a plurality of small holes 33 in the guard latch 3 and a plurality of recesses 43 in the sickle member 4 corresponding to each other and accommodating steel balls selectively in each small hole 33 or in all of them, the magnitude of the frictional resistance can be adjusted. The interlocking mechanism 7 may be provided with a mechanism other than that of this embodiment, for example, a friction plate that generates frictional resistance between the guard latch 3 and the sickle member 4, as long as it interlocks the operating member 2 and the guard latch 3 with the sickle member 4.

[0021] Next, the operation of this sliding door lock will be described. From the unlocked state shown in Figures 2(a) to (c), by holding the knob portion 21 of the operating member 2 and rotating it 90 degrees to the left, the operating member 2, the guard latch 3, and the sickle member 4 are linked together, and the sickle portion 41 of the sickle member 4 is hooked onto the edge portion 81 of the slit 8 provided in the door frame. At the same time, by rotating the cylinder lock of the locking mechanism 5 90 degrees to the right with the key, the cam 6 is engaged with the recess 34 of the guard latch 3, and the rotation of the operating member 2 and the guard latch 3 is restricted, thereby allowing the door to be locked as shown in Figures 2(d) and 3(a). At this time, the sickle member 4 is covered and hidden from the outside of the sliding door by the protruding piece 31 of the guard latch 3 inserted into the slit 8, preventing unauthorized operation and ensuring safety in terms of crime prevention.

[0022] 2(d) and 3(a), even when the locking is performed (in this case, it does not matter whether the locking is performed by the cylinder lock of the locking mechanism 5 or not), as shown in FIG. 3(b), the operation part 44 of the sickle part 41 exposed from the lock main body 1 made of the case member can be used to operate the sickle member 4. By rotating the sickle member 4 from inside the sliding door against the frictional resistance that links the operating member 2 of the interlocking mechanism 7, the guard latch 3 and the sickle member 4, it is possible to easily unlock the door from inside the storeroom, for example, and a person trapped inside the storeroom can escape on their own.

[0023] Furthermore, since the tip surface 41a of the sickle portion 41 of the sickle member 4 is formed into an inclined surface (or curved surface), even if the sliding door is closed by mistake when the sickle portion 41 of the sickle member 4 is in the locked position, as shown in Figure 3(c), the tip surface 41a of the sickle portion 41 formed into an inclined surface (or curved surface) slides along the edge 81 of the slit 8 against the frictional resistance that links the operating member 2 and guard latch 3 of the interlocking mechanism 7 with the sickle member 4, causing the sickle member 4 to rotate, thereby absorbing the impact and preventing damage to the sliding door lock, storage, etc.

[0024] Even if the interlocking between the operating member 2 and the guard latch 3 and the sickle member 4 is broken and a rotational phase difference occurs between the operating member 2 and the guard latch 3 and the sickle member 4, the initial unlocked state shown in Figures 2(a) to 2(c) can be restored by rotating the cylinder lock of the locking mechanism 5 90° to the left with a key and rotating the operating member 2 90° to the right by holding the knob portion 21 of the operating member 2 against the frictional resistance that interlocks the operating member 2, the guard latch 3 and the sickle member 4 of the interlocking mechanism 7.

[0025] The above describes the sliding door lock of the present invention based on its embodiments, but the present invention is not limited to the configurations described in the above embodiments, and the configuration can be changed as appropriate within the scope of the spirit of the present invention. [Industrial Applicability]

[0026] The sliding door lock of the present invention has a simple structure and is highly secure against unauthorized unlocking, and therefore can be suitably used as a sliding door lock installed on a sliding door of a storage room or the like that has an internal space through which people can enter and exit. [Explanation of symbols]

[0027] 1 tablet 11. Operating member housing 12 Cylinder lock housing 13 Rotating shaft insertion hole 2 Operating member 21 Knob 22 Rotation axis 3 Guard Latch 31 Projecting piece 32 Fitting hole 33 small hole 34 Recess 4 Sickle parts 41 Kamabe 41a Tip surface 42 Free fit hole 43 Depression 44 Control section 5 Locking mechanism 51 protrusion 6 Cam 61 long hole 7 Interlocking mechanism (steel ball) 8 Slits 81 Edge

Claims

1. A sliding door lock that locks by hooking the sickle part of the sickle member of the lock body on the edge of a slit in the door frame, The lock body is provided with an operating member that can be rotated from the outside of the sliding door, a guard latch that has a protruding piece that is inserted into the slit and rotates together with the operating member on a common axis, a sickle member that is provided inside the guard latch and that can rotate freely by a predetermined angle relative to the operating member and the guard latch on a common axis, a locking mechanism that can be operated from the outside of the sliding door and that restricts the rotation of the operating member and the guard latch, and an interlocking mechanism that interlocks the operating member, the guard latch, and the sickle member, 13. A lock for a sliding door, wherein the sickle member has an operating portion that enables the sickle member to be rotated from inside the sliding door.

2. 2. The lock for a sliding door according to claim 1, wherein the interlocking mechanism comprises a friction resistance member disposed between the guard latch and the sickle member to generate friction resistance.

3. 3. The lock for a sliding door according to claim 1, wherein a tip surface of the sickle portion of the sickle member is formed into an inclined surface or a curved surface.

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