JPH08312225A - Earthquake resisting latch lock - Google Patents

Abstract

PURPOSE: To provide a latch lock excellent in earthquake resisting function in which a handle exclusive for opening and closing a door can be omitted, and an erroneous release is never caused. CONSTITUTION: A latch lock is formed of a catch 4 on a housing chamber side, a lock body 2 arranged through a door 1, and a pull-button type operation unit 3. The lock body 2 is formed of a case 5, a sliding bolt 6, and a spring 7 for advancing and energizing the bolt 6, and a releasing lever 8. The operation unit 3 has a knob case 25, a knob 26 supported so as to be protruded and recessed in the direction orthogonal to the bolt 6, and a spring 29 for returning the knob 26. The inner end of the knob 26 is connected to one end of the lever 8 by a transmitting shaft 28. When the knob 26 is pulled, the lever 8 is oscillated so that the bolt 6 can be released, and the door 1 can be opened in this state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic resistant latch lock applied to a door for a storage part of a kitchen or a door of a cabinet, and more particularly to a latch lock for unlocking a bolt by pulling a knob.

[0002]

2. Description of the Related Art There is a seismic latch lock which keeps the door closed and prevents the contents from falling and scattering even when the contents collide with the door due to an earthquake or the like. An example of the seismic resistant latch lock manufactured and sold by the applicant in the past is shown in FIG. There, a push button 51 embedded in the door 50
The lock main body 52 fixed to the inner surface of the door 50 and the catch 54 fixed to the opening peripheral wall of the cabinet 53 constitute a seismic resistant latch lock. When the push button 51 is pushed in, a pin 55 provided at the inner end of the push button 51 contacts a lever 56 inside the lock body 52, and the lever 56 is swung in the clockwise direction. Along with the swinging motion of the lever 56, the bolt 57 moves back and forth against the urging force of the spring 58, and the engagement state with the catch 54 is unlocked. Reference numeral 59 is a handle for opening and closing the door 50.

[0003]

The above-described seismic resistant latch lock has the bolt 57 when the push button 51 is pushed in.
Since it takes the form of being unlocked, it is necessary to provide a handle 59 for opening and closing the door in addition to the latch lock, resulting in a high overall cost. The push button 51, the lock main body 52, and the handle 59 have to be individually attached to the door 50 and the cabinet 53, respectively, which is disadvantageous in that construction is troublesome. When a part of the body accidentally collides with the push button 51, the door 1 may receive the collision reaction force and open.

An object of the present invention is to provide a seismic resistant lock which allows the bolt to be unlocked by pulling and moving the knob, thus omitting a dedicated handle for opening and closing the door. The object of the present invention is that the latch lock is a pull latch, and even if the body or other object collides with the unlocking knob, the unlocked state can be maintained and the user's clear An object of the present invention is to provide a seismic-resistant latch lock that can hold the door closed and reliably prevent the stored items from popping out unless there is an intention to unlock it. An object of the present invention is to provide a seismic-resistant latch lock that allows the lock body and the operation unit to be attached to the door with a small amount of labor, and can cope with variations in the thickness of the door to some extent.

[0005]

The seismic resistant latch lock of the present invention has a lock body 2 and an operation unit 3 which are arranged inside and outside with the door 1 interposed therebetween, and a catch 4 which is arranged on the inner peripheral surface of the opening of the storage chamber. The lock body 2 includes a case 5, a bolt 6 that is slidably supported in the case 5, and a bolt 6 that supports the bolt 6.
It has a spring 7 that urges it to move in the direction of advancing from, and a bell crank-shaped lever 8 that is swingably supported by the case 5 and that moves the bolt 6 back and forth against the urging force of the spring 7. The operation unit 3 includes a knob case 25 fitted and mounted in a mounting hole 1a provided through the door 1, a knob 26 supported by the knob case 25 so as to be retractable and retractable, and a transmission shaft 28 connecting the knob 26 and the lever 8. In the door closed state in which the bolt 6 is advanced by the spring 7 and abuts and engages with the catch 4, the operating arm 8b of the lever 8 abuts the passive wall 22 of the bolt 6 as shown by the solid line in FIG. 26 is knob case 2
5 is pulled inward and located at the standby position.

Specifically, the case 5 of the lock body 1 and the knob case 25 are received and supported by the inner surface wall and the outer surface wall of the door 1, respectively, and the screw 46 inserted into the case 5 from the inner surface side of the door 1 is used as the knob case 25. Screw it to both cases 5-2
Fix 5 to door 1. Further, the transmission shaft 28 and the knob 26 are connected via a screw 27. Knob 26 and knob case 2
A spring 29 for biasing the knob 26 toward and away from the standby position is provided between the spring 29 and the valve 5.

The case 5 includes a main case 5a and a main case 5a.
A lid 5b that is press-fitted to the main body 5a and the lid 5b, and a bolt 6 and a spring 7 are arranged between the main case 5a and the lid 5b.
The lever 8 is arranged in a groove 17 provided at the center of the lid 5b, and is supported by a pin 19 so as to be swingable. As shown in FIG. 5, the transmission shaft 28 may be formed integrally with the knob 26, and the knob case 25 that guides the transmission shaft 28 in and out may be press-fitted into the mounting hole 1a from the outer surface side of the door 1.

[0008]

When the door is closed, the bolt 6 abuts and engages with the catch 4 to prevent the door 1 from swinging open. When the knob 26 is pulled from this state, the advancing operation of the knob 26 is transmitted to the lever 8 via the transmission shaft 28. Lever 8 is pin 1
While swinging around 9, the bolt 6 is slid in the unlocking direction against the spring 7. The door 1 can be opened by subsequently pulling the knob 26. That is, since the door 1 can be opened and operated by using the knob 26 for unlocking the bolt, it is not necessary to provide a dedicated opening / closing handle.

Since the case 5 of the lock main body 2 and the knob case 25 are arranged inside and outside the door 1 and are connected by the screw 46, both the cases 5 and 2 can be simply screwed in and operated.
5 can be fastened and fixed to the door 1 at the same time. Even when the thickness of the door 1 changes, the screw-in amount of the screw 46 with respect to the knob case 25 changes, and the cases 5 and 25 can be fastened and fixed together without any trouble. In order to absorb the change in the distance between the lever 8 and the knob 26 at this time, the transmission shaft 28 is screwed onto the knob 26 by a screw 27.
Are connected with.

Since the knob 26 is biased to move back and forth by a spring 29 dedicated thereto, even when there is a loose clearance between the bolt 6, the lever 8 and the transmission shaft 28, the knob 26 is subject to external vibration or the like. It can prevent rattling.

According to the structure of the lock body 2 in which the case 5 is composed of the main case 5a and the lid 5b, and the lever 8 is assembled to the lid 5b, after the spring 7 and the bolt 6 are assembled to the main case 5a, the lever is preliminarily set. The lock body 2 can be easily assembled only by press-fitting and mounting the lid 5b incorporating the drive shaft 8 and the transmission shaft 28 on the main case 5a.

[0012]

According to the present invention, the latch lock is constructed as a pull latch and the knob 6 is pulled to operate the bolt 6.
The lock 1 can be unlocked, and after unlocking, the knob 26 can be grasped to open the door 1. Therefore, the handle for opening and closing the door, which was indispensable in the conventional push-latch type earthquake-resistant latch, can be omitted, and the cost can be reduced accordingly.
The time and effort of assembly can be reduced. Even if another object accidentally collides with the unlocking knob 26, the knob 26 only maintains the standby position and is not switched to the unlocked state by the collision force. In other words, unless the user has a clear intention of unlocking, the locked state can be maintained, and the stored items can be reliably prevented from popping out, which is advantageous in that the seismic function of the latch lock can be improved.

The lock body 2 and the operation unit 3 are arranged inside and outside the door 1, and the two and 3 are fastened to the door 1 by fastening them with a screw 46, and further, the knob 26 and the transmission shaft 28 are screwed through the screw 27. Since they are connected, even if the thickness of the door 1 changes, it can be accommodated within a certain range without any trouble, and assembling can be performed with less labor compared with the conventional mounting structure.

[0014]

1 to 4 show an embodiment of a seismic resistant latch lock according to the present invention. In FIG. 2, the latch lock includes a lock body 2 arranged on the inner surface of the door 1 and a pull button type operation unit 3 inserted into the mounting hole 1a provided in the door 1 from the outer surface side of the door.
And a catch 4 arranged on the inner peripheral wall of the opening of the storage chamber. The door 1 is supported so as to open and swing in the direction indicated by the arrow.

The lock main body 2 includes a case 5, a bolt 6 which is guided and supported by the case 5 so as to be retractable, a compression coil type spring 7 which urges the bolt 6 to move out of the case 5, and a bolt. 6 is composed of a bell crank-shaped lever 8 which is operated to move in and out against the biasing force of the spring 7.

In FIG. 3, the case 5 is composed of a main case 5a and a lid 5b, each of which is an injection-molded product, and the bolt 6 is slid and guided by these both 5a and 5b. The main case 5a is formed of a case body having a convex cross-section that opens downward, has a guide groove 10 for the bolt 6 on the inner surface, and has an outlet / retract opening 11 on one end wall of the guide groove 10. Main case 5
A pair of front and rear mounting bases 12 are projected on the lower surface of the opening of a, and four screw holes are provided in the plate surface. Mounting base 1
A circular connecting seat 13 is formed in a concave shape on the mounting surface side of 2.

The lid 5b has a horizontally long rectangular support portion 14 which fits in the guide groove 10, a flange 15 is projected to the front and rear of the lower end thereof, and a circular connecting portion 1 is provided on the lower surface of the support portion 14.
Project 6 A groove 17 penetrating vertically is provided near the center of the support portion 14 in the left-right direction, and a restriction groove 18 is formed so as to be adjacent to the opening upper surface of the groove 17. The groove 17 is formed in a cross shape, and the lever 8 is housed in the laterally long groove portion of the groove 17.
It is rockably supported by. A clevis 40 of a transmission shaft 28, which will be described later, is fitted into a groove portion that intersects with the horizontally long groove portion and is slid and guided. A pair of engaging claws 20 are provided on both left and right ends of the supporting portion 14, and the lid 5b is attached to the main case by press-fitting the engaging claws 20 into the engaging holes of the main case 5a. It can be integrated with 5a. In this assembled state, the flange 15 fits into the fastening seat 13 (see FIG. 4).

The bolt 7 is a rod having a rectangular parallelepiped cross section,
An engagement guide surface 6a inclined toward the side end is provided on one side (left side in the drawing), and a spring receiving groove 6b is provided on the other side. Further, a groove into which the lever 8 is inserted is formed between the both 6a and 6b in a vertically penetrating manner, and the inner wall of the groove on the spring receiving groove 6b side is the passive wall 22. A stopper claw 23 is provided on the lower surface of the end portion on the spring receiving groove 6b side. The bolt 6 and the spring 7 are housed in the guide groove 10 of the main case 5a, and then the lid 5b is assembled to the main case 5a.
The one side of the engagement guide surface 6a protrudes out of the case 5 to maintain the advanced posture, the operation arm 8b of the lever 8 contacts the passive wall 22, and the stopper claw 23 fits in the regulation groove 18 of the lid 5b. It is stuck.

The operation unit 3 is connected to a knob case 25 made of plastic, a knob 26 supported by the knob case 25 so as to freely move in and out, and an inner end of the knob 26 via a screw 27 so that the knob 26 can move in and out. Transmission shaft 28 transmitted to lever 8
And a compression coil type spring 29 that biases the knob 26 toward and away from the standby position. Knob 26 and transmission shaft 2
8 is also a plastic molded product.

In FIG. 3, the knob case 25 is made of a tubular body, and has a large-diameter connecting portion 30 which is fitted in the mounting hole 1a and a flange 3 which is received and supported by the peripheral wall of the opening of the mounting hole 1a.
1 and a small-diameter knob receiving cylinder 3 protruding to the outer surface of the flange 31.
2 and a knob hole 33 is provided along the inner cylinder axis. Around the knob hole 33 in the connecting portion 30,
Four screw pilot holes 34 for fastening the knob case 25 to the case 5 are provided. The knob hole 33 has a circular cross section on the knob receiving cylinder 32 side, but has a quadrangular cross section on the connecting portion 30 side. This is for slidingly guiding the knob 26 so that it cannot rotate.

The knob 26 is provided with a shaft body 35 which is guided and supported in a knob hole 33 so that the knob 26 can be moved back and forth, and a screw 36 (see FIG. 4) at the outer end of the shaft body 35.
The control knob 37 is fixed with the control knob 37), both of which are formed of a plastic molded product. A rectangular flange-shaped spring receiving portion 38, which is slidably guided by the knob hole 33, is provided at the inner end of the shaft body 35. The spring receiving portion 38 and the knob hole 3 are provided.
A compression coil type spring 29 is interposed between the inner and inner ends of the spring 3. A screw hole 27b opened inside the shaft body 35 on the inner end side of the shaft.
Is provided, and the screw hole 27b and the male screw 27a of the transmission shaft 28 are provided.
And form the screw 27. The operating knob 36 is the knob receiving tube 3
A circular button having a diameter larger than 2 is formed, and a boss protruding from the inner surface thereof is formed in a non-circular cross section. The operation knob 37 and the shaft body 35 can be integrally rotated by inserting and connecting the boss into the connection hole at the outer end of the shaft body 35 and fastening and fixing with the screw 36.

The transmission shaft 28 is composed of a shaft body having a clevis 40 at one end, and a male screw 27 is provided on the peripheral surface of the shaft other than the clevis 40.
It is made of a plastic molded product in which a is formed. Clevis 4
The connecting arm 8a of the lever 8 is sandwiched between 0 and both 8a and 40
Are connected by a pin 41, and the knob 26 is screwed into the male screw 27a, so that the knob 26 and the lever 8 are interlockably connected. The pin hole on the side of the connecting arm 8a is formed in the long hole 42 in order to absorb the difference between the locus of the swing of the lever 8 and the locus of withdrawal of the transmission shaft 28.

The catch 4 is a plastic molded product in which an engaging projection 44 is projected from one end of a base wall 43 for mounting, and the engaging projection 44 receives the bolt 6 to hold the door 1 closed. When the door 1 is operated to be closed, the bolt 6 is moved in and out against the elastic force of the spring 7, so that the engaging projection 4
A guide surface 45 formed of an arcuate inclined surface is provided on the outer surface side of 4. The catch 4 is fixed to the inner peripheral surface of the opening of the storage chamber by fastening the base wall 43 with a screw.

Next, the procedure for attaching the seismic resistant latch lock will be described. It is assumed that the door 1 is provided with a mounting hole 1a in a penetrating manner in advance, and the lock body 2 and the operation unit 3 are assembled. However,
The transmission shaft 28 is connected to the lever 8 and assembled to the lock body 2 side. First, the catch 4 is fixed to the inner peripheral surface of the opening of the storage chamber as described above. Next, connect the connecting portion 16 of the lid 5b to the mounting hole 1
It is fitted into the opening of the inner surface of a, the whole case 5 is brought into close contact with the inner surface of the door 1, and the mounting base 12 thereof is fastened and fixed to the door 1 with two screws.

Thereafter, the connecting portion 30 of the knob case 25 is inserted into the mounting hole 1a from the outer surface side of the door 1. During the insertion, the protruding end of the transmission shaft 28 contacts the knob 26,
Stick out to the outside of the knob case 25. Knob 2 in this state
6 and the knob case 25 are rotated to screw the shaft body 35 into the transmission shaft 28 so that the flange 31 is brought into contact with the outer surface of the door 1. Finally, the two screws 46, which are inserted into the mounting base 12 of the case 5, are screwed into the screw holes 34 of the knob case 25, and the lock body 2 and the operation unit 3 are fastened and fixed at the same time.

When the door 1 is closed, the bolt 6 projects from the case 5 and abuts and engages with the engaging projection 44 of the catch 4, as shown in FIG. It is received by the tip of the receiving tube 33. When the knob 26 is pulled against the tension of the spring 29, the operation is transmitted to the lever 8 via the transmission shaft 28,
The lever 8 swings clockwise around the pin 19 to move the bolt 6 back and forth against the tension of the spring 7.
As a result, the bolt 6 is unlocked as shown in FIG. 2, and the door 1 can be opened by subsequently pulling the knob 26.

FIG. 5 shows another embodiment of the seismic resistant latch lock. There, a transmission shaft 28 is integrally formed at the inner end of the knob 26, and the spring 29 is omitted. In this case, the knob case 25 is configured as a guide cylinder having a flange 31 at the cylinder end, and is driven into the mounting hole 1a from the outer surface side to form the knob 2
6 was guided and supported on the inner surface of the cylinder so as to be able to move in and out freely. The knob 26 has a shaft portion supported by the knob case 25, and a spherical operation knob 37 is provided at the outer end thereof. The other structures of the lock body 2 and the catch 4 are the same as those in the above-mentioned embodiment.

In addition to the above, the elongated hole 42 for absorbing the trajectory difference between the lever 8 and the transmission shaft 28 can be provided on the transmission shaft 28 side. When the mounting hole 1a is formed as a stepped hole having a large diameter on the inner surface side of the door and a small diameter on the outer surface side of the door, the flange 31 is omitted and the knob case 25 is incorporated into the mounting hole 1a from the inner surface side of the door, and the knob receiving cylinder 32 thereof is provided. It is possible to adopt an assembling form in which the is projected to the outer surface of the door. The lock body 2 may have any mounting posture in which the central axis of the bolt 6 extends along the vertical direction, the horizontal direction, or the front-back direction, and the mounting posture is not limited. The shape of the operation knob 37 can be modified into a polygonal shape or a T-shaped handle shape in addition to the button shape.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of a state in which an earthquake-resistant latch lock is locked.

FIG. 2 is a cross-sectional plan view with the seismic resistant latch lock unlocked.

FIG. 3 is a sectional view in a state where all parts are disassembled.

4 is a cross-sectional view taken along the line AA in FIG.

FIG. 5 is a cross-sectional plan view showing another embodiment of the seismic resistant latch lock.

FIG. 6 is a cross-sectional plan view of a conventional seismic latch lock.

[Explanation of symbols]

 1 Door 1a Mounting Hole 2 Lock Body 3 Operation Unit 4 Catch 5 Case 6 Bolt 7 Spring 8 Lever 25 Knob Case 26 Knob 27 Screw 28 Transmission Shaft

Claims (5)

[Claims] 1. A seismic-resistant latch lock having a lock body 2 and an operation unit 3 arranged inside and outside with a door 1 interposed therebetween, and a catch 4 arranged on an inner peripheral surface of an opening of a storage chamber, wherein the lock body 2 is a case. 5, a bolt 6 slidably supported on the case 5, a spring 7 for urging the bolt 6 to move out of the case 5, and a bolt 6 supported by the case 5 so as to be swingable. 7 has a bell-crank-shaped lever 8 for reciprocating operation against the urging force of 7, and the operation unit 3 is fitted in a mounting hole 1a provided in the door 1 and mounted in a knob case 25, and a knob case 25 is moved in and out. The lever 8 is operated in a door closed state in which the knob 26 freely supported and the transmission shaft 28 connecting the knob 26 and the lever 8 are engaged, and the bolt 6 is advanced by the spring 7 and abuttingly engages with the catch 4. Arm 8b is a passive wall with bolts 6 22 and the knob 26 is the knob case 2
Seismic latch lock that is pulled inward of 5 and is in the standby position. 2. A case 5 of the lock body 1 and a knob case 25.
And are supported by the inner wall and the outer wall of the door 1, respectively. By screwing the screw 46 inserted into the case 5 from the inner surface side of the door 1 into the knob case 25, both cases 5 and 25 are fixed to the door 1. The seismic-resistant latch lock according to claim 1, wherein the transmission shaft 28 and the knob 26 are connected via a screw 27. 3. The seismic-resistant latch lock according to claim 1, wherein a spring 29 is provided between the knob 26 and the knob case 25 to bias the knob 26 toward and away from the standby position. 4. The case 5 is a main case 5a and a main case 5
a lid 5b that is press-fitted to the a, a bolt 6 and a spring 7 are arranged between the main case 5a and the lid 5b, and a groove provided in the center of the lid 5b. The lever 8 is arranged at 17,
The seismic resistant latch lock according to claim 1, 2 or 3, wherein the lever 8 is swingably supported by a pin 19. 5. A transmission shaft 28 is formed integrally with the knob 26, and a knob case 25 for guiding the transmission shaft 28 in and out is installed in the mounting hole 1a.
The seismic resistant latch lock according to claim 1 or 4, wherein the door 1 is press-fitted from the outer surface side.