JP3905941B2 - Latch lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a digging lock used as an office lock or an entrance lock, and more particularly to a latch lock using a latch, such as an empty lock and a uni-bolt lock that combines an empty lock and a main lock.
[0002]
[Prior art]
The latch lock is adapted to use the direction of the inclined surface of the latch head in accordance with the direction of opening and closing of the door depending on whether the door is attached to the outside opening or the inside opening via a hinge. Recently, a latch lock has been used in which a latch lock is incorporated in the door in advance and the direction of the inclined surface of the latch head can be changed at the installation site of the door.
[0003]
FIG. 5 shows a known latch lock that can change the orientation of the latch head. A latch head 50 having a non-circular cross section in this latch lock is inserted into a latch cover 56 having a circular outer edge. A latch cover 56 similar in shape to the latch head 50 protrudes and protrudes from a frame rib 56a. The latch cover 56 is rotatably fitted in the face plate 52 of the lock body 51, and both the latch cover 56 and the latch head 50 are rotated.
[0004]
An armor plate 53 having a hole 54 into which the frame-shaped rib 56a of the latch cover 56 fits is fitted to the face plate 52 to constitute a front F. The hole 54 of the armor plate 52 forms the latch cover 56 and the latch cover 56. The latch head 50 to be inserted is prevented from rotating.
[0005]
Therefore, when changing the direction of the inclined surface 50a of the latch head 50 of the conventional latch lock, the armor plate 53 is removed by removing the screw (not shown) fixing the front F to the door from the screw hole 57 of the front F. It is removed from the face plate 52, the latch head 50 is made to be rotatable, and the latch cover 56 is rotated 180 degrees together with the latch head 50.
[0006]
Then, the armor plate 52 is attached to the face plate 52 again to prevent the latch head 50 from rotating, and the screw is tightened to complete the direction changing operation of the latch head 50.
[0007]
[Problems to be solved by the invention]
Although the conventional latch lock can change the direction of the latch head 50 at the work site while it is mounted on the door, the latch head 50 is rotated after the armor plate 53 is once removed from the face plate 52. The workability was poor. In addition, when the armor plate 53 is reattached, the screw is insufficiently tightened or forgotten to be tightened, so that the attachment state is impaired, causing a work mistake that causes rattling.
[0008]
The present invention has been made in view of the above problems, and it is intended to improve the latch lock with good workability, in which the direction change of the latch head of the latch lock attached to the door can be easily performed without worrying to impair the mounting state. It is an issue.
[0009]
[Means for Solving the Problems]
The present invention includes a face plate having an opening communicating with a lock body, a rotatable latch head protruding and retracting from the opening, and the latch head being inserted into the opening so as to be rotatable. A latch cover; and an armor plate provided with a circular hole into which a frame-like rib of the latch cover in which the latch head protrudes and retracts so as not to rotate is rotatably fitted; A stopper piece having a hooking hole biased by a spring in the direction of the opening is detachably engaged with one of a pair of grooves in the flange portion of the latch cover in the recess communicating with the opening. The armor plate has a vertically long hole communicating with the hook hole at a position corresponding to the stopper piece, and the armor plate is fixed to the face plate. : It is formed, by releasing the engagement of the stopper piece and the latch cover by inserting a thin pin from the vertical hole to Kakeana the stopper piece, to allow rotating the latch cover and the latch head.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
[0011]
1 to 4 show an embodiment of a latch lock according to the present invention. A face plate 1 having an opening 3 communicating with the inside of a lock body 2 and a spring 11 urged from the opening 3. A turnable latch head 10 that moves in and out, a latch cover 20 through which the latch head 10 is inserted and turnably fitted into the opening 3, and a latch cover 20 in which the latch head 10 comes and goes so that it cannot turn. An armor plate 30 provided with a circular hole 31 into which the frame-like rib 22 is rotatably fitted. The front plate F is formed by caulking the armor plate 30 to the face plate 1.
[0012]
The face plate 1 is formed of a slightly thick steel plate in a rectangular shape, and a step portion 4 is formed in an opening portion 3 communicating with a lock body 2 perforated in a central portion, and an upper portion of the opening portion 3. Is provided with a recess 5 communicating with the inside of the opening 3.
[0013]
And in this recess 5, the stopper piece 7 urged | biased by the spring 6 toward the opening part 3 direction is accommodated so that a vertical movement is possible. This stopper piece 7 has substantially the same thickness as the depth dimension of the recess 5, and a hook hole 8 is drilled. Reference numerals 9 and 9 are a pair of caulking receiving holes for fixing the armor plate 30.
[0014]
Further, the latch 12 is well known, and the latch head 10 at the tip thereof is formed with arcuate surfaces 13 and 14 on the upper and lower surfaces, and vertical surfaces 15 and 16 on both sides, and the front is the vertical surface. The inclined surface 17 extends from 15 to the vertical surface 16. The rear side is contact walls 18 and 19 projecting up and down along the arcuate surfaces 13 and 14, and the latch 12 is prevented from coming out of the front F by contacting the latch cover 20. .
[0015]
The latch cover 20 is a ring-shaped synthetic resin ring that is inserted into an insertion hole 21 similar to the latch head 10 formed in the center of the latch cover 20 and rotates together with the latch head 10. Is fitted into the opening 3 of the first. And the outer periphery becomes the collar part 23 contact | abutted to the step part 4 of the opening part 3, and a pair of the stopper piece 7 mentioned above engages with the upper and lower sides of this collar part 23 so that engagement / disengagement is possible elastically. Grooves 24 and 25 are formed, and together with the stopper piece 7 constitute a rotation prevention mechanism for the latch head 10. Further, on the front surface of the latch cover 20, a frame-shaped rib 22 having a circular outer periphery on which the latch head 10 protrudes and protrudes is projected.
[0016]
The armor plate 30 is formed using a steel plate that is thinner than the face plate 1, and is substantially similar to the face plate 1, and the frame rib 22 of the latch cover 20 is rotatable at the center thereof. A circular hole 31 that is flush with the front surface is provided. Further, a longitudinally long hole 32 communicating with the hooking hole 8 of the stopper piece 7 is formed at a position corresponding to the stopper piece 7 of the armor plate 30 and at a position corresponding to the caulking receiving holes 9 and 9 of the face plate 1. Is formed with a pair of caulking holes 33, 33.
[0017]
Then, the armor plate 30 is joined to the face plate 1, and both the caulking holes 33 and 33 and the caulking receiving holes 9 and 9 are caulked and fixed, and a front F having a stopper piece 7 provided therein is formed. Yes. Needless to say, the means for fixing the face plate 1 and the armor plate 30 is not limited to the caulking, but can also be achieved by bonding or screwing.
[0018]
As apparent from the above description, the latch shape of the present embodiment is assembled with the armor plate 30 caulked on the face plate 1 to form a rigid front F, and rotates together with the latch cover 20. The latch head 10 is made non-rotatable by the groove 24 of the latch cover 20 and the stopper piece 7 that is elastically engageable and disengageable with the groove 24.
[0019]
As in the case of the conventional latch lock, when the direction of the inclined surface 17 of the latch head 10 is adapted to the opening direction of the door to be built, the latch head 10 is used as it is. Turn to change the direction of the inclined surface 17 by 180 degrees.
[0020]
In order to change the direction of the inclined surface 17 of the latch head 10 of the present embodiment, as shown in FIG. 3, a thin pin 35 is prepared, and from the vertically long hole 32 of the armor plate 30 to the hanging hole 8 of the stopper piece 7. The stopper piece 7 is lifted from the groove 24 of the latch cover 20 against the biasing force of the spring 6 to release the engaged state. Then, while holding the released state, the latch head 10 is picked with fingers and rotated 180 degrees, and the stopper piece 7 is elastically restored and engaged with the groove 25 of the latch cover 20 after the rotation.
[0021]
【The invention's effect】
The latch lock of the present invention implemented in the form as described above has the following effects.
[0022]
A stopper piece that prevents rotation of the latch head is installed inside the front formed by fixing the armor plate to the face plate, and a pin is inserted through a vertically long hole on the front front surface to operate the latch head. Since it was made possible to rotate, when changing the direction of the latch head, there is no troublesome work of removing and reattaching the armor plate like the conventional latch lock, Is expedited.
[0023]
In addition, it is possible to prevent an operation error such as insufficient tightening of the screw or forgetting to tighten the armor plate when the armor plate is reattached in the field, and the attachment state of the latch lock is not impaired by the direction change operation of the latch head.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a latch lock of the present invention.
2A is a front view of the face plate showing a state before the armor plate is crimped, and FIG. 2B is a front view of the armor plate.
3 is a cross-sectional view of the main part of the latch lock of FIG. 1;
4 is a plan view of the main part of the latch lock of FIG. 1. FIG.
5A is a plan view of a main part, and FIG. 5B is a front view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Face plate, 2 Lock body, 3 Opening part, 5 Recessed part, 7 Stopper piece, 8 Stopper hole, 10 Latch head, 11 Spring, 20 Latch cover, 22 Frame-like rib, 23 Gutter part, 24 groove, 30 Armor plate , 31 circular holes, 32 vertical holes, F front,

Claims (1)

A face plate having an opening communicating with the inside of the lock body, a rotatable latch head protruding and retracting from the opening, and a latch cover that is inserted into the opening so that the latch head is inserted into the opening. An armor plate provided with a circular hole in which a frame-like rib of the latch cover is pivotably fitted so that the latch head protrudes and disappears; communicating with the opening of the face plate In the recess, a stopper piece having a hooking hole biased by a spring in the direction of the opening is accommodated in one of a pair of grooves on the flange of the latch cover so as to be detachably engaged. In addition, a vertically long hole communicating with the hooking hole is formed at a position corresponding to the stopper piece of the armor plate, and the front is formed by fixing the armor plate to the face plate. Latch lock, characterized by being.

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