JP7239194B2 - lock - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock in which a latch repeatedly advances and retreats with respect to a fixed frame as the key reciprocates.

A cylinder lock is well known in which a latch repeatedly advances and retreats toward a fixed frame in accordance with reciprocating rotational motion of a key inserted into a keyhole of the lock, thereby locking and unlocking the fixed frame. .

For example, the door open/close identification device described in Patent Document 1 uses a cylinder lock as an example of its use. A lock that performs the functions has a lid capable of opening and closing the keyhole. The lock also has a stopper that reciprocates in one direction as the latch advances and retreats. When the lid is opened, the key is operated to retract the latch, and the lock is in the unlocked state, the stopper is at a position approaching the opened lid to prevent the lid from moving in the closing direction. Therefore, with this lock, the door is closed imperfectly, and the latch moving forward toward the fixed frame collides with the fixed frame. If it is not, the stopper is still in a state of preventing the movement of the lid in the closing direction, and the lid cannot be closed, and the operator of the key is notified that the lock is incomplete. can be done.

JP 2018-159257 A

When the lock disclosed in the prior art is used outdoors, dust such as yellow sand may enter the sliding portion of the latch, preventing the latch from moving forward and backward smoothly. For example, even if the door is normally closed with respect to the fixed frame, the key after the locking operation can be removed from the keyhole, and the lid for the keyhole can be closed, the door will not move toward the fixed frame. The forward movement of the latch stops halfway, resulting in a so-called half-locked state, which may cause a problem that the door is not in a properly locked state.
An object of the present invention is to provide a lock that can obviate such problems.

The object of the present invention for solving the above-mentioned problems is a latch attached to a door that opens and closes with respect to a fixed frame, and a latch moves forward and backward with respect to the fixed frame in accordance with the reciprocating rotation of a key. is repeated to repeat the locked state and the unlocked state of the door.

In such a lock, the features of the present invention are as follows. That is, the lock includes a case portion that houses the latch, and an operation portion that enables the reciprocating motion of the latch according to the reciprocating rotation operation of the key inserted into the keyhole of the cylinder lock attached to the case portion. and, attached to the operation portion at a position opposite to the case portion with respect to the operation portion, so as to open and close the keyhole about an axis extending in a direction intersecting the direction in which the cylinder lock extends. It has a cap that reciprocates and swivels. An assist bar is incorporated in the operating portion, and the length direction of the assist bar extends perpendicularly to the shaft for the reciprocating pivotal movement of the cap and parallel to the direction in which the cylinder lock extends. The assist bar also has an inner end that can abut against the latch and an outer end that is opposite to the inner end and can abut against the cap in the longitudinal direction. and is spring-biased in a direction to contact the cap when it is in the closed state. When the cap is in the open state and the latch is retracted to unlock the lock, the inner end of the assist bar is in contact with or capable of contacting the latch. When the cap is pivoted in the closing direction, the cap abuts the outer end of the assist bar and the inner end of the assist bar abuts the latch, further pushing the cap in the closing direction. Rotation is blocked. When the latch is advanced and the lock is in a predetermined locked state, when the cap in the open state is pivoted in the closing direction, the cap is pushed outward from the assist bar. The end portion is pushed against the biasing force of the spring to move the inner end portion of the assist bar from the case portion in the longitudinal direction of the assist bar while the cap is closed. When the lock is at an intermediate position between the predetermined locked state and the unlocked state and the latch is in a half-engaged state, the cap is moved from the opened state. When the cap is turned toward the closed state, the inner end portion of the assist bar is formed to face the inner end portion as the cap presses the outer end portion of the assist bar. By pressing the inclined surface of the latch that is engaged, the latch is further advanced to bring the lock into the predetermined locked state.

In one embodiment of the invention, the ramp on the latch forms an acute angle with the advancing direction.

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

In another aspect of the present invention, in the assist bar, the outer end portion and the inner end portion have a large diameter, and a gap between the outer end portion and the inner end portion is: An intermediate portion having a smaller diameter than the outer end portion and the inner end portion is present, and a coil spring through which the intermediate portion is inserted is present between the outer end portion and the inner end portion.

According to the lock of the present invention, when the latch does not move forward smoothly toward the fixed frame and is in a half-engaged state, when the cap is to be closed, the cap comes into contact with the assist bar, causing the assist bar to close. presses the rear end of the latch so that the latch advances, so that the half-engaged state of the latch is released and the lock can advance to a predetermined locked state. With such an action of the assist bar, the lock according to the present invention can recognize that the lock is in a predetermined locked state when the cap is closed.

The drawings show specific embodiments of the present invention according to the present disclosure and include not only essential features of the invention, but also optional and preferred embodiments.
A perspective view of a lock. A perspective view of the lock when the cap is open. FIG. 3 is a perspective view of a case portion and an operation portion; The perspective view of a case part. The same figure as FIG. 4 which shows the inside of a case part. A view similar to FIG. 5 when the latch is on the near side. FIG. 7 is a top view of the case portion in FIG. 6; VIII-VIII line arrow view in FIG. (a) is a view taken along line VIII-VIII in 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). 9(a) and 9(b) are diagrams similar to FIG. 9(a), exemplifying how the assist bar acts on the latch; FIG. The figure which shows the state when the cap is closed about the lock in the state of Fig.10 (a).

The details of the lock according to the present invention are described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of lock 10 in use. A lock 10 is attached to a door 2 shown in phantom lines that opens and closes with respect to a fixed frame 1 shown in phantom lines. In FIG. 1, the lock 10 is in the locked state, but the door 2 in the unlocked state reciprocates 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 includes a case portion 11 which accommodates the latch 15 so as to move forward and backward and is attached to the door 2 by a screw (not shown) passing through the screw hole 9a. It has an operating portion 12 extending forward (outward) and a cap portion 13 attached to the operating portion 12 with 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) on the fixed frame 1 . The cap portion 13 is attached to a base portion 16 fixed to the operation portion 12 and to the base portion 16 via a hinge mechanism 18, and can open and close a keyhole 22 in the operation portion 12 by reciprocating and turning. and a cap 17 .

FIG. 2 is a view similar to FIG. 1 when the cap 17 is in the open position. A base portion 16 of the cap portion 13 is attached to the operation portion 12 with a screw 9b. A plug 21 and a keyhole 22 of a cylinder lock 20 incorporated in the operating portion 12 are visible in the central portion of the base portion 16 . The base portion 16 also incorporates a small latch 25 that can enter and retreat from the inside of the engagement frame portion 17a formed on the cap 17 when the cap 17 is closed. It extends inside a rectangular hole 23 formed in the . Also visible on the side 16a of the base 16 are a pair of push buttons 24 which allow the small latch 25 to be temporarily retracted from the hole 23. As shown in FIG. When the push button 24 is pushed using a pushing tool having a desired shape, for example, a small protrusion 5b formed on the knob 5a of the key 5, the small latch 25 can be retracted in conjunction with the push button 24. can. When the cap 17 that is open in the drawing 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 is returned to the state shown in FIG. 2 by the action of an urging spring (not shown). Cap 17 can be locked. With the cap 17 in the locked state, when the push button 24 is pressed, the small latch 25 retreats from the engagement frame 17a in conjunction with this, so that the cap 17 can be opened again to the state shown in FIG. At the base portion 16 of the cap portion 13, an assist bar 30 also extends upward in the figure.

FIG. 3 is a view similar to FIG. 2, but with the cap portion 13 removed. However, the screw 9b is attached to the operation portion 12 in the sense of clearly indicating the presence of a screw hole therefor. The operating portion 12 incorporates the mechanism portion such as the plug 21 of the cylinder lock 20, and is attached to the cover plate 11a of the case portion 11 by screws 9c, which will be described later. In the operating portion 12, an assist bar 30 extends upward in the drawing in a manner penetrating through the operating portion 12. As shown in FIG.

4 and 5, FIG. 4 shows a state in which the screw 9c is loosened and the operating portion 12 is removed from the cover plate 11a, and FIG. 5 shows a state in which the screw 9e is loosened in FIG. 4 to remove the cover plate 11a from the case. The case part 11 when removed from the part 11, that is, the internal structure of the case part 11 is shown. In FIG. 4, the rotation angle regulating plate 21b attached to the end of the plug 21 of the operating portion 12 using the machine screw 9d can be seen inside the through hole 26 formed in the central portion of the cover plate 11a. Also shown in FIG. 4 is an assist bar 30 . The assist bar 30 is attached to the operating portion 12 and the cover plate 11a so as not to be pulled out. , a virtual one is shown. In FIG. 5 , the latch 15 is biased by a coil spring 27 inside the case portion 11 , and the front end portion 15 a of the latch 15 extends from the case portion 11 toward the fixed frame 1 . FIG. 5 also shows a virtual assist bar 30 to facilitate understanding of its position.

6 and 7, FIG. 6 is a view similar to FIG. 5 when the position of the latch 15 is opposite to FIG. FIG. 4 is a top view of portion 11 and latch 15; The latch 15 is urged by the coil spring 27 so that the front end portion 15a, which is partially thickened, protrudes from the groove portion 11b in the case portion 11 toward the predetermined portion 3 of the fixed frame 1 indicated by the phantom line. . In the latch 15, at the thin rear end portion 15b located behind the front end portion 15a, a cam follower is provided on the surface facing the operating portion 12 through the cover plate 11a (see FIG. 4), that is, on the upper surface 15c of the latch 15. A recess 40 is formed including a working surface 40a extending in a working arc. A rotation angle regulating plate 21b attached to the plug 21 of the cylinder lock 20 to regulate the rotation angle of the plug 21 reciprocates while sliding on the working surface 40a as the cylinder lock 20 reciprocates. , a pin-shaped cam projection 21c for moving the latch 15 forward and backward. However, in the cam projection 21c shown in the figure, not the working end that contacts the working surface 40a but the fixing end to the rotation angle regulating plate 21b, which is the opposite end, is visible. 7, the latch 15 has a rectangular planar shape and has side edges 41 and 42 extending parallel to each other in the advancing direction A. The side edges 41 and 42 each extend from the case portion. 11 reciprocates in the forward direction A and in the reverse direction B while sliding on the parallel long sides 45 and 46 defining a rectangular groove 43 for accommodating the latch 15 at 11 . Exercise is possible. The forward direction A is the direction toward the fixed frame 1 .

As is clear from FIG. 7, the side edge 41 of the latch 15 is formed with a notch 50 extending in the longitudinal direction of the latch 15, that is, in the front-rear direction. The notch 50 includes a front end 51 located on the forward direction A side of the latch 15, a rear end 52 located on the backward direction B side, and a groove between the front end 51 and the rear end 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 cutout portion 50 of the latch 15 when the latch 15 is fully advanced to the point where it is properly fitted to a predetermined portion of the fixed frame 1 has an assist as shown in the figure. The bar 30 fits. A portion of the linear portion 53 is formed with an inclined surface 55 that slopes downward toward the recessed portion 54 in FIG. 6 (see FIG. 6 and FIG. 9(a) described later). Furthermore, as will be described later, the assist bar 30 in FIG. It has an intermediate portion 33 with a smaller minor diameter than these portions 31 and 32, and a coil spring 34 acting as a biasing spring is present outside the intermediate portion 33. As shown in FIG. In other words, the intermediate portion 33 is in a state in which the coil spring 34 is inserted. 6 and 7, the lower end 32 of the major diameter is located in the recess 54 in the latch 15. FIG.

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

9(a) and (b), FIG. 9(a) is a view taken along line VIII-VIII in FIG. 6, but unlike FIG. 8, it shows the entire lock 10. FIG. FIG. 9(b) is a side view of the lock 10. FIG.

9(a) and 9(b), the lock 10 is in a state where the cap 17 is open, the latch 15 is fully retracted so that the entirety of the latch 15 is accommodated in the case portion 11, and the assist bar 30 is closed. 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. Its lower end 32 is also in close proximity or contact with the rear end 15b of the latch 15. As shown in FIG. With the lock 10 in this state, when the open cap 17 is turned in the closing direction, the cap 17 collides with the assist bar 30 and cannot be closed as shown in FIG. 9(b).

10(a) and 10(b) are diagrams similar to FIG. 9(a) showing the action of the assist bar 30 on the latch 15. FIG. Here, as an example, in FIG. 9(a), when the key 5 (see FIG. 1) is used to rotate the plug 21 of the cylinder lock to the locked state and the key 5 is extracted from the plug 21, If normal, the front end portion 15a of the latch 15, which should advance to a predetermined portion of the fixed frame 1 to bring the lock 10 into a predetermined locked state, enters between the latch 15 and the case portion 11, for example. Frictional resistance against sliding between the case portion 11 and the latch 15 is large due to dust such as yellow sand that is being carried, and only a portion of the front end portion 15a enters the fixed frame 1, and the lock 10 is in a predetermined locked state. There may be a so-called half-credited state in which there is no At that time, when the person who operates the lock 10 understands that the locking operation is finished and turns the cap 17 in the closing direction, the cap 17 comes into contact with the assist bar 30. 10(a) and 10(b), the lower end portion 32 abuts the inclined surface 55 (see FIG. 6) formed on the rear end portion 15b of the latch 15 from above in the drawing to fix the latch 15. It can be driven forward towards the frame 1 to complete the locking operation.

FIG. 11 shows the state of the lock 10 of FIG. 10(a) when the cap 17 is closed. As shown in FIG. 11, when the cap 17 is properly closed, the front end 15a of the latch 15 is also inserted into the fixed frame 1 by a predetermined distance, that is, by a sufficient length, and the lock 10 and the door 2 are closed. is in a predetermined locked state, and the half-locked state is eliminated. 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 come out of the case portion 11 (see FIG. 10(b)).

With the lock 10 in a predetermined locked state, prior to opening the door 2, when the closed cap 17 (see FIG. 1) is turned in the opening direction, the assist bar 30 is moved by the restoring force of the coil spring 34. , rises in its entirety to allow retraction of the latch 15 . Therefore, when the unlocking operation is performed using the key 5, the latch 15 is retracted to the state shown in FIG. 9A so that the door 2 can be opened.

In the lock 10 that operates in this manner, the inclined surface 55 formed on the latch 15 depends on the thickness (height) of the rear end portion 15b of the latch 15, the stroke (movement distance) of the latch 15, and the inclination angle of the inclined surface 55. It is a part whose shape should be determined in consideration of the above. In one example of such an inclined surface 55, the distance that the latch 15 advances toward the fixed frame 1 until the lock 10 is in a predetermined locked state is reduced to, for example, 1/3 of that distance. It may be designed so that the lower end 32 of the descending assist bar 30 begins to contact the ramp 55 of the latch 15 as the latch 15 advances. In addition, the angle between the inclined surface 55 and the longitudinal direction of the latch 15 may be set in the range of 30 to 50 degrees, for example, in consideration of the strength of the force when pressed by the assist bar 30. . In one example of the assist bar 30, the lower end portion 32 and the intermediate portion 33 are integrally formed, and the intermediate portion 33 is inserted through the coil spring 34 from the top thereof, while the upper end portion 31 is separately prepared. A screw hole is formed in the lower end portion of the upper end portion 31, and the top portion of the intermediate portion 33 inserted into the coil spring 34 is screwed into the screw hole to assemble the assist bar 30. can.

Reference Signs List 1 fixed frame 2 door 5 key 10 lock 11 case portion 11a cover plate 12 operation portion 13 cap portion 15 latch 15a front end portion 16 base portion 17 cap 20 cylinder lock 21 plug 22 keyhole 30 assist bar 31 upper end portion 32 lower end portion 33 intermediate portion 34 Coil spring 50 Notch 55 Inclined surface 60 Through hole 61 Large diameter portion 62 Small diameter portion 63 Stepped portion

Claims (4)

The latch is attached to a door that opens and closes with respect to a fixed frame, and the latch repeats forward and backward reciprocating motions with respect to the fixed frame in accordance with the reciprocating rotation of the key, thereby locking and unlocking the door. is a repeated lock,
The lock includes a case portion that houses the latch, an operating portion that enables the reciprocating motion of the latch accompanying the reciprocating rotation operation of the key inserted into a keyhole of a cylinder lock attached to the case portion, It is attached to the operation part at a position opposite to the case part with respect to the operation part, and reciprocates around an axis extending in a direction intersecting the direction in which the cylinder lock extends so as to open and close the keyhole. having a pivoting cap,
An assist bar is incorporated in the operating portion, and the length direction of the assist bar is perpendicular to the shaft for the reciprocating orbiting movement of the cap and extends parallel to the direction in which the cylinder lock extends,
The assist bar also has an inner end that can abut against the latch and an outer end that is opposite to the inner end and can abut against the cap in the longitudinal direction. and is spring-biased in a direction to contact the cap when it is in the closed state,
When the cap is in the open state and the latch is retracted to unlock the lock, the inner end of the assist bar is in contact with or capable of contacting the latch. When the cap is pivoted in the closing direction, the cap abuts the outer end of the assist bar and the inner end of the assist bar abuts the latch, further pushing the cap in the closing direction. rotation is blocked,
When the latch is advanced and the lock is in a predetermined locked state, when the cap in the open state is pivoted in the closing direction, the cap is pushed outward from the assist bar. The cap is closed while pushing the end portion against the bias of the spring to advance the inner end portion of the assist bar from the case portion in the longitudinal direction of the assist bar,
When the lock is at an intermediate position between the predetermined locked state and the unlocked state and the latch is in a half-engaged state, the cap is moved from the opened state. When the cap is turned toward the closed state, the inner end portion of the assist bar is formed to face the inner end portion as the cap presses the outer end portion of the assist bar. The lock is characterized in that the assist bar assists the latch to be further advanced by pressing the inclined surface of the latch, which is engaged with the lock, to bring the lock into the predetermined locked state. 2. The lock of claim 1, wherein said ramp on said latch forms an acute angle with said direction of advancement. 3. The lock according to claim 2, wherein a portion of said inner end portion of said assist bar that presses said inclined surface of said latch is inclined along said inclined surface. In the assist bar, the outer end portion and the inner end portion have a larger diameter, and the portion between the outer end portion and the inner end portion has a larger diameter than the outer end portion and the inner end portion. 4. A lock according to any one of claims 1 to 3, wherein there is an intermediate portion with a small force, and between said outer end and said inner end there is also a coil spring through which said intermediate portion is inserted.

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