JP2022069053A - Lock - Google Patents

Abstract

To prevent the latch of a lock from being in a half-latched state due to a midway stop during forward movement thereof toward a fixed frame.SOLUTION: A lock has an operation section 12 to which a cylinder lock is attached, a latch 15, and a cap that rotates to open and close a keyhole of the operation section 12. The operation section 12 incorporates an assist bar 30. The assist bar 30 has an inner end 32 and an outer end 31, and the outer end 31 comes into contact with the cap that is in its closed state under the force of a spring 34. Under the condition where the cap is in its opened state and concurrently a latch 15 to be advanced is in its half-latched state due to its midway stop, when the cap is rotated in the closing direction, the cap contacts the outer end 31 of the assist bar 30 and presses a sloping surface 55 formed on the latch 15 with the inner end 32 of the assist bar 30, moving the latch 15 forward toward a fixed frame to cause the lock in its half-latched state to be in a specified locked position.SELECTED DRAWING: Figure 10

Description

The present invention relates to a lock in which a latch repeatedly moves forward and backward with respect to a fixed frame as the key reciprocates.

Cylinder locks are well known in which the latch repeatedly moves forward and backward toward the fixed frame to lock and unlock the fixed frame as the key inserted into the keyhole of the lock reciprocates. ..

For example, the door open / close identification device described in Patent Document 1 uses a cylinder lock as an example of its use, and the latch repeatedly locks and unlocks by repeatedly moving forward and backward by the reciprocating rotational movement of the key inserted in the keyhole. The lock that performs and has a lid that can open and close its keyhole. Further, this lock has a stopper that reciprocates in one direction as the latch moves forward and backward. The lid is opened and the key is operated to retract the latch, and when the lock is unlocked, the stopper is in a position close to the opened lid to prevent the lid from moving in the closing direction. Therefore, with this lock, the door is closed incompletely, and the latch that advances toward the fixed frame comes into contact with the fixed frame, and even if the key can be removed from the keyhole, it will be in a normal locked state. If not, the stopper is still blocking the movement of the lid in the closing direction and the lid cannot be closed, informing the person who operates the key that the lock is incomplete. Can be done.

Japanese Unexamined Patent Publication No. 2018-159257

When the lock as disclosed in the prior art is used outdoors, dust such as yellow sand may enter the sliding portion of the latch, and the latch may not smoothly move forward or backward. For example, even if the door to the fixed frame is normally closed, the key after locking can be removed from the keyhole, and the lid to the keyhole can be closed, the door is directed toward the fixed frame. The advance of the latch may stop halfway, resulting in a so-called half-hanging state, which may cause the problem that the door is not in the proper locked state.
An object of the present invention is to provide a lock capable of preventing such a problem.

The object of the present invention for solving the above-mentioned problems is that the latch is attached to a door that opens and closes with respect to the fixed frame, and the latch reciprocates with respect to the fixed frame with the reciprocating rotation operation of the key. By repeating the above, the locked state and the unlocked state of the door are repeated.

The features of the present invention in such a lock are as follows. That is, the lock is a case portion for accommodating the latch and an operation unit that enables the reciprocating movement of the latch accompanying the reciprocating rotation operation of the key inserted into the keyhole of the cylinder lock attached to the case portion. The keyhole is opened and closed around an axis that is attached to the operation unit at a position opposite to the case portion with respect to the operation unit and extends in a direction intersecting the direction in which the cylinder lock extends. Has a cap that makes a reciprocating swivel motion. An assist bar is incorporated in the operation unit, and the length direction of the assist bar is orthogonal to the axis for the reciprocating turning motion of the cap and extends in parallel with the extending direction of the cylinder lock. The assist bar also has an inner end portion capable of contacting the latch and an outer end portion opposite to the inner end portion capable of contacting the cap in the length direction. The spring is urged in the direction of contact with the cap when it is in the closed state. When the cap is in the open state and the latch is retracted and the lock is in the unlocked state, the assist bar is in a state where the inner end portion is in contact with or can be contacted with the latch. When the cap is swiveled in the closing direction, the cap abuts on the outer end of the assist bar, and the inner end of the assist bar abuts on the latch, further in the closing direction of the cap. The turn is blocked. When the latch is advanced and the lock is in a predetermined locked state, the cap is outside the assist bar when the cap in the open state is swiveled in the closing direction. The end portion is pushed against the spring force, and the cap is closed while the inner end portion of the assist bar is advanced from the case portion in the length direction of the assist bar. When the lock is in a position intermediate between the position when the lock is in the predetermined locked state and the position when the lock is in the unlocked state and the latch is in the half-hooked state, the cap is opened from the opened state. When swiveled toward the closed state, the cap is formed to face the inner end portion of the assist bar as the cap presses the outer end portion of the assist bar. By pressing the inclined surface of the latch to further advance the latch, the lock is brought into the predetermined locked state.

In one of the embodiments of the present invention, the inclined surface of the latch forms an acute angle with respect to the advancing direction.

In another embodiment of the present invention, the portion of the inner end of the assist bar that presses the inclined surface of the latch is inclined along the inclined surface.

In another embodiment of the present invention, in the assist bar, the outer end portion and the inner end portion are portions having a large diameter, and the outer end portion and the inner end portion are located between the outer end portion and the inner end portion. There is an intermediate portion having a diameter smaller than that of the outer end portion and the inner end portion, and there is a coil spring through which the intermediate portion is inserted between the outer end portion and the inner end portion.

According to the lock according to the present invention, when the latch does not advance smoothly toward the fixed frame and is in a half-latch state, when the cap is tried to be closed, the cap abuts on the assist bar and the assist bar is in contact with the assist bar. Presses the rear end of the latch so that the latch advances, so that the latch is released from the half-hooked state and can be advanced to the point where the lock is in the predetermined locked state. Due to such an action of the assist bar, in the lock according to the present invention, if the cap is closed, it can be recognized that the lock is in a predetermined locked state.

The drawings show specific embodiments of the invention according to the present disclosure, including not only the essential configurations of the invention, but also selective and preferred embodiments.
Perspective view of the lock. Perspective view of the lock when the cap is open. Perspective view of the case part and the operation part. Perspective view of the case. The same figure as FIG. 4 which shows the inside of a case part. The figure similar to FIG. 5 when the latch is on the front side. Top view of the case portion in FIG. FIG. 6 is a line arrow view of VIII-VIII in FIG. (A) is a view taken along the line VIII-VIII of FIG. 6 illustrating the positional relationship between the latch and the assist bar, and (b) is a side view of the lock in the state of (a). (A) and (b) are the same diagrams as FIG. 9 (a) illustrating the state of action of the assist bar on the latch. The figure which shows the state of the lock in the state of FIG. 10A when the cap is closed.

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 of the lock 10 in a used state. The lock 10 is attached to the door 2 of the virtual line that opens and closes with respect to the fixed frame 1 indicated by the virtual line. In FIG. 1, the lock 10 is in the locked state, but the door 2 in the unlocked state makes a reciprocating turning motion by the action of a hinge (not shown) interposed between the fixed frame 1 and the door 2. , Can be opened and closed with respect to the fixed frame 1. The lock 10 has a case portion 11 that retracts the latch 15 so as to be able to move forward and backward and is attached to the door 2 by a screw (not shown) that is passed through the screw hole 9a, and a case portion 11 that is attached to the case portion 11 and is attached to the door 2. It has an operating portion 12 extending forward (outside) and a cap portion 13 attached to the operating portion 12 by a screw 9b (see FIG. 2). In the case portion 11, the latch 15 advances toward the fixed frame 1 and is housed in a predetermined locking portion (not shown) in the fixed frame 1. The cap portion 13 is attached to the base portion 16 fixed to the operation portion 12 via a hinge mechanism 18, and can perform a reciprocating turning motion to open and close the postscript keyhole 22 in the operation portion 12. It has a cap 17.

FIG. 2 is a diagram similar to FIG. 1 when the cap 17 is in the open state. The base portion 16 of the cap portion 13 is attached to the operation portion 12 by a screw 9b. At the center of the base 16, the plug 21 and the keyhole 22 of the cylinder lock 20 incorporated in the operation unit 12 can be seen. The base 16 also incorporates a small latch 25 that can enter and exit the inside of the engaging frame 17a formed on the cap 17 when the cap 17 is closed, and the small latch 25 is the base 16. It advances to the inside of the rectangular hole portion 23 formed in. Also visible on the side surface 16a of the base 16 is a pair of pushbuttons 24 capable of temporarily retracting the small latch 25 from the hole 23. When the push button 24 is pushed by using a push tool having a required shape, for example, by using a small protrusion 5b formed on the grip portion 5a of the key 5, the small latch 25 may be retracted so as to be interlocked with the small protrusion 5b. can. When the open cap 17 in the figure is closed, the engaging frame portion 17a of the cap 17 pushes the small latch 25 to temporarily retract the small latch 25 from the hole portion 23. When the cap 17 is closed, the small latch 25 returns to the state shown in FIG. 2 by the action of the urging spring (not shown), but the small latch 25 at this time enters the inside of the engaging frame portion 17a of the cap 17. The cap 17 can be locked. When the push button 24 is pressed, the small latch 25 retreats from the engaging frame portion 17a in the locked cap 17, so that the cap 17 can be opened again to be in the state shown in FIG. At the base 16 of the cap portion 13, the assist bar 30 also extends upward in the figure.

FIG. 3 is the same as FIG. 2, but the cap portion 13 is removed. However, the screw 9b is attached to the operation unit 12 in the sense that the existence of a screw hole for that purpose is clearly indicated. The operation unit 12 has a built-in mechanical unit such as a plug 21 in the cylinder lock 20, and is attached to the cover plate 11a in the case unit 11 by a screw 9c described later. In the operation unit 12, the assist bar 30 extends upward in the figure so as to penetrate the operation unit 12.

4 and 5, FIG. 4 shows a state when the screw 9c is loosened and the operation unit 12 is removed from the cover plate 11a, and FIG. 5 shows a state in which the screw 9e is loosened and the cover plate 11a is used as a case. The case portion 11 when it is removed from the portion 11, that is, the internal structure of the case portion 11 is shown. In FIG. 4, a rotation angle restricting plate 21b attached to the end of the plug 21 of the operating portion 12 using a machine screw 9d is visible inside the through hole 26 formed in the central portion of the cover plate 11a. FIG. 4 also shows the assist bar 30. The assist bar 30 is assembled so that it cannot be pulled out from the operation unit 12 and the cover plate 11a. However, in FIG. 4, the assist bar 30 is for the purpose of facilitating the understanding of its existence position. , The virtual one is shown. In FIG. 5, a latch 15 is urged by a coil spring 27 inside the case portion 11, and a front end portion 15a of the latch 15 extends from the case portion 11 toward the fixed frame 1. Also in FIG. 5, a virtual assist bar 30 is shown in order to facilitate understanding of its existence position.

6 and 7, FIG. 6 is a diagram similar to FIG. 5 when the position of the latch 15 is opposite to that of FIG. 5 and is viewed so as to be on the front side of the diagram, and FIG. 7 is a case in FIG. It is a top view of the portion 11 and the latch 15. The latch 15 is urged by the coil spring 27, and the front end portion 15a, which is partially formed to be thick, advances from the groove portion 11b in the case portion 11 toward the predetermined portion 3 of the fixed frame 1 indicated by the virtual line. .. In the latch 15, the thin rear end portion 15b located behind the front end portion 15a is used as a cam follower on the surface facing the operation portion 12 via the cover plate 11a (see FIG. 4), that is, on the upper surface 15c of the latch 15. A recess 40 is formed that includes a working surface 40a that extends in an arc so as to act. The rotation angle regulating plate 21b, which is attached to the plug 21 of the cylinder lock 20 and regulates the rotation angle of the plug 21, reciprocates while sliding the working surface 40a with the reciprocating rotation of the cylinder lock 20. , A pin-shaped cam protrusion 21c that moves the latch 15 forward and backward is attached. However, in the cam projection 21c in the figure, not the working end portion in contact with the working surface 40a but the fixing end portion with respect to the rotation angle regulating plate 21b which is the opposite end portion is visible. As is clear from FIG. 7, the latch 15 has a rectangular planar shape, has side edge portions 41, 42 extending in parallel with each other in the forward direction A, and each of the side edge portions 41, 42 has a case portion. Reciprocating in the forward direction A and the reverse direction B while sliding each of the long sides 45 and 46 parallel to each other defining the rectangular groove 43 for accommodating the latch 15 in 11. Exercise is possible. The forward direction A is a direction toward the fixed frame 1.

As is clear from FIG. 7, a notch 50 extending in the length direction of the latch 15, that is, in the front-rear direction is formed in the side edge portion 41 of the latch 15 in the rear portion of the latch 15. The notch 50 is a groove portion between the front end portion 51 located on the side of the latch 15 in the forward direction A, the rear end portion 52 located on the side in the backward direction B, and the front end portion 51 and the rear end portion 52. It has a straight portion 53 parallel to the long side 45 of 43, and a concave portion 54 extending in an arc between the straight portion 53 and the rear end portion 52. In FIG. 7, the concave portion 54 of the notch portion 50 in the latch 15 is assisted as shown in the drawing when the fixing frame 1 is sufficiently advanced to the point where it is fitted to the predetermined portion as predetermined. The bar 30 fits. Further, an inclined surface 55 having a downward slope toward the concave portion 54 in FIG. 6 is formed in a part of the straight portion 53 (see FIG. 6 and FIG. 9A below). Furthermore, as will be described later, the assist bar 30 in FIG. 6 is interposed between the upper end portion 31 of the major axis, the lower end portion 32 of the same major axis, and the upper end portion 31 and the lower end portion 32. A coil spring 34 having a minor diameter intermediate portion 33 having a diameter smaller than both portions 31 and 32 and acting as an urging spring exists on the outside of the intermediate portion 33. In other words, the intermediate portion 33 is in a state of being inserted into the coil spring 34. In FIGS. 6 and 7, the lower end portion 32 of the major axis is located at the concave portion 54 of the latch 15.

FIG. 8 is a view taken along the line VIII-VIII in FIG. 6, but only the assist bar 30, the operation unit 12, and the cover plate 11a of the case unit 11 are shown. A through hole 60 is formed in the operation unit 12 so as to be parallel to the plug 21, and the through hole 60 has a large diameter portion 61 located above in the figure and a small diameter portion 62 located below, and is large. A step portion 63 is formed between the diameter portion 61 and the small diameter portion 62. In the through hole 60, the upper end portion 31 of the assist bar 30 is slidably fitted to the large diameter portion 61 in the length direction and the circumferential direction of the assist bar 30, and the lower end portion 32 is below the cover plate 11a. The lower end portion 32 does not pass through the cover plate 11a and rise. The intermediate portion 33 of the assist bar 30 is located in the large diameter portion 61 and the small diameter portion 62 of the through hole 60, and is slidably fitted to the small diameter portion 62 in the length direction and the circumferential direction of the assist bar 30. It fits. The coil spring 34 is located between the upper end portion 31 of the assist bar 30 and the stepped portion 63 of the through hole 60 in the large diameter portion 61, and is supported by the stepped portion 63 to urge the assist bar 30 toward the upper part of the figure. ing. The lower end portion 32 of the assist bar 30 is formed with a downward inclined surface 32a that intersects the direction in which the latch 15 advances at an acute angle. It is particularly preferable that the inclined surface 32a is inclined along the inclined surface 55 in the latch 15.

In FIGS. 9A and 9B, FIG. 9A is a line arrow view of VIII-VIII of FIG. 6, but unlike FIG. 8, it shows the entire lock 10. FIG. 9B is a side view of the lock 10.

In FIGS. 9A and 9B, the lock 10 has the cap 17 open, and the latch 15 is sufficiently retracted to the point where the entire latch 15 is housed in the case portion 11, and the assist bar 30 is used. The upper end portion 31 is pushed upward in FIG. 9A by the urging action of the coil spring 34, and the lower end portion 32 abuts or approaches the cover plate 11a of the case portion 11 from below. The lower end portion 32 is also in a state of approaching or in contact with the rear end portion 15b of the latch 15. In the lock 10 in this state, when the open cap 17 is swiveled in the closing direction, the cap 17 abuts on the assist bar 30 and cannot be closed, as shown in FIG. 9B.

10 (a) and 10 (b) are the same views as FIG. 9 (a) showing the state of action of the assist bar 30 on the latch 15. Here, as an example, in FIG. 9A, when the plug 21 of the cylinder lock is rotated to the locked state by using the key 5 (see FIG. 1) and the key 5 is removed from the plug 21. If normal, the front end portion 15a of the latch 15 that should advance to the predetermined portion of the fixed frame 1 to bring the lock 10 into the predetermined locked state enters, for example, between the latch 15 and the case portion 11. The frictional resistance against sliding between the case portion 11 and the latch 15 is large due to dust such as yellow sand, and only a part of the front end portion 15a has entered the fixed frame 1, and the lock 10 is in a predetermined locked state. It may be in a so-called half-hanging state, which is not the case. At that time, when the person who operates the lock 10 understands that the locking operation is completed and turns the cap 17 in the closing direction, the cap 17 comes into contact with the assist bar 30, but the assist bar 30 at that time is shown in the figure. As shown in 10 (a) and 10 (b), the lower end portion 32 abuts on the inclined surface 55 (see FIG. 6) formed on the rear end portion 15b of the latch 15 from above in the figure to fix the latch 15. The locking operation can be completed by driving the frame 1 forward.

FIG. 11 shows a state when the cap 17 is closed in the lock 10 of FIG. 10 (a). As shown in FIG. 11, when the cap 17 is closed as predetermined, the front end portion 15a of the latch 15 also enters the fixed frame 1 by a predetermined distance, that is, by a sufficient length, and the lock 10 and the door 2 are entered. And is in the predetermined locked state, and the half-hanging state has been resolved. At this time, the lower end portion 32 of the assist bar 30 can pass through the through hole 11d formed in the bottom portion 11c of the case portion 11 and go out of the case portion 11 (see FIG. 10B).

In the lock 10 in the predetermined locked state, prior to opening the door 2, when the cap 17 in the closed state (see FIG. 1) is swiveled in the opening direction, the assist bar 30 is subjected to the restoring force of the coil spring 34. , Its whole rises, allowing the latch 15 to retract. Therefore, when the unlocking operation is performed using the key 5, the latch 15 retracts to the state shown in FIG. 9A, and the door 2 can be opened.

In the lock 10 that acts in this way, the inclined surface 55 formed on the latch 15 has the thickness (height) of the rear end portion 15b of the latch 15, the stroke (moving distance) of the latch 15, and the inclined angle of the inclined surface 55. It is a part whose shape should be determined in consideration of such factors. In an example of such an inclined surface 55, with respect to the advancing distance until the latch 15 advances toward the fixed frame 1 and the lock 10 becomes a predetermined locked state, for example, up to 1/3 of the advancing distance. It may be designed so that when the latch 15 advances, the lower end portion 32 of the descending assist bar 30 begins to come into contact with the inclined surface 55 of the latch 15. Further, the inclined surface 55 may set the angle between the latch 15 and the front-rear direction in the range of, for example, 30 to 50 degrees in consideration of the strength of the force when pressed by the assist bar 30. .. In an example of the assist bar 30, the lower end portion 32 and the intermediate portion 33 are integrally formed, the intermediate portion 33 is inserted from the top thereof into the coil spring 34, and the upper end portion 31 is prepared as a separate body. The assist bar 30 can be assembled by forming a screw hole in the lower end portion of the upper end portion 31 and screwing the top portion of the intermediate portion 33 inserted through the coil spring 34 into the screw hole. can.

1 Fixed frame 2 Door 5 Key 10 Lock 11 Case part 11a Cover plate 12 Operation part 13 Cap part 15 Latch 15a Front end part 16 Base 17 Cap 20 Cylinder lock 21 Plug 22 Keyhole 30 Assist bar 31 Upper end 32 Lower end 33 Intermediate part 34 Coil spring 50 Notch 55 Inclined surface 60 Through hole 61 Large diameter part 62 Small diameter part 63 Step part

Claims (4)

Attached to a door that opens and closes with respect to the fixed frame, the latch repeats the reciprocating motion of forward and backward with respect to the fixed frame as the key reciprocates, thereby locking and unlocking the door. Is a repetitive lock
The lock includes a case portion for accommodating the latch, an operation portion that enables the reciprocating movement of the latch accompanying the reciprocating rotation operation of the key inserted into the keyhole of the cylinder lock attached to the case portion, and an operation portion. It is attached to the operation part at a position opposite to the case part with respect to the operation part, and reciprocates so as to open and close the keyhole about an axis extending in a direction intersecting the direction in which the cylinder lock extends. With a cap that swivels
An assist bar is incorporated in the operation unit, and the length direction of the assist bar is orthogonal to the axis for the reciprocating turning motion of the cap and extends in parallel with the direction in which the cylinder lock extends.
The assist bar also has an inner end portion capable of contacting the latch and an outer end portion opposite to the inner end portion capable of contacting the cap in the length direction. The spring is urged in the direction of contact with the cap when it is in the closed state.
When the cap is in the open state and the latch is retracted and the lock is in the unlocked state, the assist bar is in a state where the inner end portion is in contact with or can be contacted with the latch. When the cap is swiveled in the closing direction, the cap abuts on the outer end of the assist bar, and the inner end of the assist bar abuts on the latch, further in the closing direction of the cap. The turn is blocked,
When the latch is advanced and the lock is in a predetermined locked state, the cap is outside the assist bar when the cap in the open state is swiveled in the closing direction. By pushing the end portion against the spring force, the cap is closed while the inner end portion of the assist bar is advanced from the case portion in the length direction of the assist bar.
When the lock is in a position intermediate between the position when the lock is in the predetermined locked state and the position when the lock is in the unlocked state and the latch is in the half-hooked state, the cap is opened from the opened state. When swiveled toward the closed state, the cap is formed so as to press the outer end portion of the assist bar so that the inner end portion of the assist bar faces the inner end portion. The lock is characterized in that the assist bar assists the lock to be in the predetermined locked state by pressing the inclined surface of the latch to further advance the latch. The lock according to claim 1, wherein the inclined surface of the latch has an acute angle with respect to the advancing direction. The lock according to claim 2, wherein the portion of the inner end of the assist bar that presses the inclined surface of the latch is inclined along the inclined surface. In the assist bar, the outer end portion and the inner end portion have a large diameter, and the diameter between the outer end portion and the inner end portion is larger than that of the outer end portion and the inner end portion. The lock according to any one of claims 1 to 3, wherein there is an intermediate portion having a small diameter, and a coil spring through which the intermediate portion is inserted is present between the outer end portion and the inner end portion.

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