JPH0663391B2 - Lock - Google Patents

Description

Description: [Industrial field of use] The present invention relates to a lock having a type in which a latch is retracted (retracted) by operating a lever handle or a ball.

[Prior art and its problem] In the conventional lock, when operating with a lever handle, since the turning force of the lever handle is large, a structure having a cam with a high stress spring for exclusive use of the lever handle is provided, Further, in the case of operating with a handball having a weak turning force, the cam is provided with a spring having a low stress dedicated to the handball.

Therefore, since the lock for the lever handle and the lock for the ball clasp are designed and manufactured separately, two types of different shapes and backsets and different packages are required, and it is cumbersome in terms of management as a whole. There was a problem that the cost would be very high.

Moreover, after the door is once attached to the door, the lock must be replaced with a lever handle exclusive use, for example, in order to replace the handball with the lever handle, and for that purpose, the cutout hole of the door needs to be changed. However, there is a problem that it requires a great deal of labor and unnecessary expense (the same is true when the lever handle is replaced with a handball).

Therefore, there is one lock as in Japanese Utility Model Laid-Open No. 1-82260, in which the handle to be used can be either a lever handle or a grip ball.

In this lock, a first cam in which a spring having a high stress acts and a second cam in which a spring having a low stress acts are provided in a single case so as to be independently rotatable. When using the handle, the operation shaft of the lever handle is inserted into the first cam, and when using the ball, the operation shaft of the ball is inserted into the second cam, so the cutout hole provided in the door After removing the lock body from the door so that the square hole of the first cam and the square hole of the second cam are aligned with each other, it is necessary to invert the lock body and reattach the lock body to the door again. There was a problem.

Also, even if the lock body is reversed and reattached, the positions of the first cam and the second cam are set so that the notch holes of the door and the square holes of the first cam and the second cam are always exactly aligned with each other. Since the distance from the front plate in the horizontal direction is equal and the distance from the vertical center of the case is equal to each other in the vertical direction, processing and assembly without dimensional error are required. That is, due to a slight deviation, the notched hole of the door does not coincide with the square holes of the first and second cams.

Therefore, an object of the present invention is to provide a lock which can be replaced from a lever handle to a ball and from a ball to a lever handle even after the lock is once attached to the door without reattaching the lock. And

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a mounting lock box, a lock box incorporated in the lock box, and rotatably supported.
A cam with a first spring having a low stress suitable for turning power of a ball is applied, a latch provided to engage with this cam and to be retracted as the cam rotates, and a cam associated with the operation. With a stress increasing device provided so that the second spring having a high stress suitable for the turning force of the lever handle can be actuated while engaging and releasing the engagement and without disturbing the rotation of the cam at the time of engagement. It is composed.

[Action]

When the operation shaft of the ball is used by inserting it into the cam, the engagement relationship between the cam and the stress increasing device is released, and the above-mentioned cam has a low stress suitable for turning force of the ball. Only the spring is activated.

When the lever handle operation shaft is inserted into the cam for use, a stress increasing device is engaged with the cam, and the cam is provided with a high-stress second spring suitable for the turning force of the lever handle. Let it work.

That is, the lever handle or the ball can be arbitrarily used with a single lock, and the notch hole provided in the door has the lever handle and the ball both for operating shafts in common.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is a lock box attached to the door A.
A cam 4 is provided therein, which is rotatably supported and on which a first spring 3 having a low stress suitable for the turning force of the ball 2 is applied.

To support the cam 4, circular projections 5 are provided on both side surfaces of the cam 4, and the projections 5 are rotatably fitted into through holes (not shown) provided in both side plates of the lock box 1. It's complicated.

Further, the first spring 3 acting on the cam 4 has both wing pieces 4'protruding from the outer peripheral surface of the cam 4 in opposite directions.
Both ends of two first springs 3 arranged in parallel with the rear plate of the lock box 1 are brought into contact with each other, and when the external force for rotating the cam 4 does not act, the fixed position, that is, both wing pieces 4'is always in the first position. 1 and FIG. 2 It is designed so that it can be returned and rotated to a position facing up and down.

A latch 9 is provided so as to be engaged with the cam 4 and to be retracted as the cam 4 rotates.

The interlocking operation of mounting and retracting the latch 7 is performed by providing a slide plate 8 which is slidable in the front-rear direction in the lock box 1 and a latch 7 which penetrates through a through hole 9 provided in the front plate of the lock box 1. The end portion of the latch bolt 10 protruding from the end is movably and slidably passed through a through hole (not shown) of the slide plate 8, and a retaining locking portion 11 is provided at the end of the latch bolt 10. Both ends of the coil spring 14 fitted on the outer side of the bolt 10 are brought into contact with the slide plate 8 and the latch 7 so that the latch bolt 1
0 is provided with a protrusion output, and two upper and lower projecting pieces 15 and 15 which are connected to the slide plate 8 and project in the rear plate direction of the lock box 1.
The engaging ends 16 and 16 provided by bending the ends of the projections 15 toward one side of the projecting pieces 15 are engaged with the wing pieces 4'and 4 ', respectively, and the cam 4 is rotated clockwise in FIG. When moved, the lower blade 4'and the engaging piece 16 are engaged with each other to retract the slide plate 8 and retract the latch 7, and when the cam 4 is rotated counterclockwise in FIG. The latch 7 is retracted while the slide plate 8 is retracted by the engagement of the wing pieces 4 ′ and the engagement pieces 16, and the fittings provided on the vertical frame member of the door frame immediately before the closing of the door A when the door A is closed ( Latch 7 (not shown)
When the door abuts, the latch 7 and the latch bolt 10 are retracted while compressing the coil spring 14, and when the door A is completely closed, the coil spring 14 pushes back the latch bolt 10 together with the latch 7 so as to project. There is.

As shown in FIGS. 2 and 3, a front plate 17 detachably attached to the front plate surface of the lock box 1 by means of screws is overlapped with the front plate 17 and a through hole 18 provided in the front plate 17 is projected. When the outer periphery of the end of the latch 7 is fitted so that the end of the latch 7 comes out of the through hole 9, the front plate 17 is removed, and then the latch 7 is removed.
Can be turned 180 degrees and the taper surface portion of the latch 7 can be directed to a position corresponding to the left opening and the right opening of the door A.

Further, in the lock box 1, the cam 4 can be engaged and disengaged with the operation, and at the time of engagement, the stress suitable for the turning force of the lever handle 21 is not hindered without inhibiting the rotation of the cam 4. A stress-increasing device 23 is provided on which the high second spring 22 can act.

The stress of the second spring 22 is significantly stronger than that of the first spring 3, and the stress increasing device 23 is arranged in the upper part of the lock box 1 in the case shown in the drawing, and is attached to the front plate of the lock box 1. A tubular body 25 rotatably attached to the both side plates of the lock box 1 by the first pins 24 having both ends supported, and a slider 26 slidably incorporated in the tubular body 25.
The second spring 22 whose both ends are engaged with the slider 26 and the first pin 24, the upper piece 27 protruding upward from the upper edge of the tip of the tubular body 25, and the lower edge of the tip of the tubular body 25 A lower piece 28 protruding downward, an upper through hole 29 provided in the upper and lower front plates of the lock box 1 so as to face the upper piece 27, a lower through hole 30 provided so as to face the lower piece 28, and a tubular body 25. The engaging portion 31 of the slider 26 engages with the upper wing piece 4'of the cam 4 only when the end of the cam is lowered, and the slider 26 in the engaged state is extended with the rotation of the cam 4 to extend the second spring 22. The operating rod 33 is composed of the long slot 32 of the blade 4'provided in the axial direction of the peripheral wall of the tubular body 25 so as to slide while the front plate 17 is removed and inserted into the upper through hole 29.
When is pushed, the upper body 27 is pushed to rotate the tubular body 25 in the counterclockwise direction in FIG. 2, and the tubular body 25 is fitted into the tubular body 25 through the elongated hole 32 as shown in FIG. The upper wing piece 4 ′ engages with the engaging portion 31 of the slider 26.

As a result, the second spring 22 can act on the cam 4.

Further, as shown in FIG. 1, when the operating rod 33 inserted into the lower through hole 30 is pushed in and the lower piece 28 is pushed, the first
By rotating the tubular body 25 in the clockwise direction in the figure, the engagement between the engaging portion 31 of the slider 26 and the upper blade 4'is released as shown in FIG. Although the lock box 1 can be operated without removing the lock box 1 from the door A, the rotation of the tubular body 25 by the rotation operation of the screw shaft by the driver other than the operation by the operation rod described above. Alternatively, a method of pulling out the lock box 1 from the door and operating it from the side surface of the lock box 1 to rotate the tubular body 25 (both not shown) may be adopted.

It should be noted that the slider 26 described above uses a bent plate having a U-shape in the case of the drawing, and the pin 3 installed between both side plates in parallel.
4, the second spring 22 is engaged, and both ends of the pin 34 are the first elongated holes 35 provided on both side walls of the tubular body 25.
The lock box 1 is guided by penetrating through the second elongated holes 36 provided on both side plates of the lock box 1, and the second elongated hole 36 of the second long hole 36 is provided on both side plates of the lock box 1.
The first pin 24 communicates with one end located on the spring 22 side.
The both ends of the pin 34 are also passed through a concentric arc-shaped hole 37 centered on the center of the arc-shaped hole 37 as the cylindrical body 25 swings.
The pin 34 is adapted to move from one end to the other end and from the other end to the one end.

The stress increasing device 23 is not limited to the illustrated embodiment, but is optional.

Further, the cam 4 has a square hole 38, and both side surfaces of the door A are
Notched holes a, a are formed so as to match both end surfaces of the square hole 38.

It should be noted that both side plates of the lock box 1 are also provided with square holes 38 and through holes (not shown) corresponding to the notches a and a.

In the figure, reference numeral 41 denotes a winding spring having a winding portion in the middle of which both ends are rotatably attached to the end of the tubular body 25 and the side plate of the lock box 1. The winding spring 41 allows the tubular body 25 to rotate naturally. Prevent.

With the above structure, as shown in FIG.
When the grip ball 2 is attached by penetrating the operation shaft 2'through the square hole 38 of the door A and the notch hole a of the door A, the stress increasing device 2 is attached to the cam 4.
The end of the tubular body 25 is raised so that the second spring 22 of No. 3 does not act, and the engagement relationship between the engaging portion 31 of the slider 26 and the upper blade 4'of the cam 4 is released.

Due to the disengagement, only the first spring 3 having a low stress suitable for the turning force of the ball 2 acts on the operation shaft 2'of the ball 2.

Further, as shown in FIG. 2, the square hole 38 of the cam 4 and the door A are
When the lever handle 21 is attached by penetrating the operating shaft 21 ′ into the notch hole a of the cylindrical body 25 of the stress increasing device 23.
While lowering the distal end of the cam 4, the upper blade 4'of the cam 4 is engaged with the engaging portion 31 of the slider 26 so that the stress increasing device 23 acts on the cam 4.

Then, when the lever handle 21 is rotated counterclockwise in FIG. 2, the slider 26 is slid toward the distal end of the tubular body 25 by the wing piece 4 ′ and the engaging portion 31 which are engaged with each other. The two springs 22 can act.

Therefore, the second spring 22 having a high stress suitable for the turning force of the lever handle 21 acts on the cam 4.

〔effect〕

As described above, according to the lock of the present invention, when the engagement between the cam and the stress increasing device is released, the cam is provided with the first spring having a low stress suitable for the turning force of the ball and the cam. When the stress increasing device is engaged with the cam, the second spring having a high stress suitable for the turning force of the lever handle can be applied to the cam, so that one lock serves as a grip ball and a lever handle. be able to.

Therefore, it is not necessary to reattach the two locks or change the cutout holes of the door.

[Brief description of drawings]

The drawings show an embodiment of a lock according to the present invention.
The figure is a vertical side view, FIG. 2 is a vertical side view in which a stress increasing device is engaged with the cam, FIG. 3 is a vertical side view in which a second spring is applied to the cam, and FIG. 4 is FIG. FIG. 5 is a sectional view taken along the line X, and FIG. 5 is a sectional view taken along the line YY of FIG. A ... Door, a ... Notch hole, 1 ... Lock box, 2 ... Handball, 2 '... Operation axis, 3 ... First spring, 4 ... Cam, 4' ... Wing piece, 7 ...... Latch, 8 ・ ・ ・ Slide plate, 9 ・ ・ ・ Through hole, 10 …… Latch bolt, 11 …… Locking part, 14 …… Coil spring, 15 …… Projecting piece, 16 …… Engaging piece, 17 ・ ・ ・... front plate, 18 ... through hole, 21 ... lever handle, 21 '... operating shaft, 22 ... second spring, 23 ... stress increasing device, 24 ... first pin, 25 ... tubular body , 26 ... slider, 27 ... upper piece, 28 ... lower piece, 29 ... upper through hole, 30 ... lower through hole, 31 ... engaging portion, 32 ... long slot for fitting, 33 ... operation Rod, 38 ... Square hole.

Claims (1)

[Claims] 1. A mounting lock box, a cam which is incorporated in the lock box to rotatably support the lock box, and a first spring having a low stress suitable for turning power of a handball, which acts on the lock box, and the cam. At the same time, the latch provided so as to move backward with the rotation of the cam can be engaged with and disengaged from the cam with the operation, and at the time of engagement, the rotation of the lever handle is prevented without obstructing the rotation of the cam. A lock comprising a stress increasing device provided so that a high-stress second spring suitable for power can be operated.