JP3015283B2 - Door lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

In the present invention, the mandrel of the lever handle is tightly mounted in the fitting hole of the rotary cam with a simple structure, so that the locking and unlocking operation can be performed reliably and smoothly, and it can be manufactured at low cost. Related to the door lock.

[0002]

2. Description of the Related Art In general, a door lock is provided with a rotating cam for moving a latch bolt forward and backward, and a mandrel integral with a lever handle is inserted into a cam hole provided in the cam, and the lever handle is rotated through a rotating operation. The locking and unlocking operation is performed. For example, in Japanese Utility Model Publication No. 4-27978, a cam for moving a latch bolt forward and backward is provided rotatably on a lock, and a square rod of a lever handle is inserted into a square hole provided on the cam.
A door lock is shown in which a locking and unlocking operation is performed through a rotation operation of the lever handle.

[0003] However, in this conventional structure, since the mandrel is inserted into the square hole, the play of the mandrel due to their dimensional tolerance cannot be avoided, and the operation and operation of the lever handle and the locking and unlocking operations have certainty and smoothness. There was a problem of lack.

For this reason, conventionally, a groove and a mounting hole are provided in the axial direction of a square rod, a linear elastic member obtained by bending a spring material is arranged along the groove, and the end is inserted into the mounting hole. When the square mandrel is inserted, the play between the square hole and the square mandrel is removed through the elasticity of the elastic member. However, this conventional device requires processing of grooves and mounting holes and bending of a spring, which has a problem that the production is complicated and the cost is increased.

[0005]

SUMMARY OF THE INVENTION The present invention solves such a problem, and the mandrel of the lever handle is tightly mounted in the fitting hole of the rotating cam with a simple structure, so that the locking and unlocking operation is performed reliably and smoothly. It is an object of the present invention to provide a door lock which can be manufactured at low cost.

[0006]

SUMMARY OF THE INVENTION For this purpose, a door lock according to the present invention is provided with a mandrel having a square cross section which is linked to a lever handle.
Providing a rotating cam with a possible square fitting hole;
The pin that can be elastically displaced in the radial direction
And a part of the peripheral surface of the pin faces the fitting hole, and the pin
Door lock with the mandrel arranged to be engageable on the peripheral surface of the door
To engage the peripheral surface of the spring pin with the corner of the mandrel
, And configure the pin with a commercially available spring pin.
With a simple configuration without special processing
Inexpensive production is achieved, and the mandrel is fixed in the fitting hole.
To be tightly and firmly mounted. Further, according to the present invention, a spring pin can be press-fitted so as to face the fitting hole.
The bottom of the spring pin is provided and the length of the spring pin is
The pin hole is formed to be shorter or shorter than the length of the pin hole.
A driving recess is provided at a position close to the opening end of the driving recess.
Push the punched-out meat part to the opening edge of the pin hole, and
Pin can be retained and the pin retaining means can be simplified.
It can be manufactured at low cost.

[0007]

[Operation] The invention according to claim 1 uses a commercially available spring for the pin.
Consist of pins and require special processing of the pins and mandrel
And realizes inexpensive production. Remove the spring pin
Attach to the corner of the mandrel so that it can be engaged, and fit the mandrel with a simple configuration
Attach tightly and firmly to the fixed position of the mating hole. According to the second aspect of the present invention, the spring pin can be pressed into the fitting hole.
Provide a bottom pin hole and adjust the length of the spring pin
It is formed shorter than the length. Proximity to the open end of the pin hole
A punching recess is provided at the position, and the punched meat portion of the punching recess is pinched.
Can be pushed out to the opening edge of the spring hole to prevent the spring pin from coming off
Make it work. Simple and inexpensive manufacturing of the pin retaining means
Can make

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A basic embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 6, reference numeral 1 denotes a door, and a groove 2 is formed at the end opposite to the hanging side. A mounting groove 3 is formed in the groove bottom, and a lock 3 is inserted into the groove 3.

The lock 4 is formed in a box shape, which is provided with a box-shaped lock case 5 and a lock cover 6 for closing the case 5, and a reinforcing plate 7 is fixed to one end of the lock case 5. It is housed in the concave groove 2. Screw holes 8, 8 are formed at the upper and lower ends of the reinforcing plate 7, and a latch hole 9 is formed therebetween. A latch bolt 10 is attached to the hole 9 so as to be able to advance and retreat.

[0010] The latch bolt 10 is formed by die casting of a zinc alloy, and a latch shaft 11 is protruded from the rear thereof.
A flange-shaped locking piece 12 is protruded from the rear end. The latch shaft 11 is slidably supported by an L-shaped bent piece 13 and has a cushioning piece 14 made of synthetic resin at its front end.
Are mounted, and the pair of leg pieces 14a, 14a
Is mounted so as to be engageable with the inner surface of the. A latch spring 15 is interposed between the cushioning piece 14 and the bending piece 13 to urge the latch shaft 11 forward through its elasticity.

A substantially box-shaped cam receiver 16 made of synthetic resin is mounted on the locking piece 12, and a first arm 18 of a rotating cam 17 is inserted between the cam receiver 16 and the bent piece 13. Arm 18
Latch shaft 11 can engage notched groove 18a is formed on. Rotating cam 17 is formed into a cylindrical shape by zinc alloy die casting, the second arm 19 is projected on the substantially opposite side of the arm 18, a square hole-like fitting hole 20 is formed in the center.

At the center of the inner surface of the fitting hole 20, a bottomed pin hole 21 is formed along the axial direction, and a part of the hole 21 is open to the inner surface of the fitting hole 20. One end of the pin hole 21 is opened at one end of the rotating cam 17, and the other end is closed inside the other end of the rotating cam 17, and the pin 22 is pressed into the hole 21.

In the case of the embodiment, a commercially available spring pin made of a stainless steel tube which can be elastically displaced in the radial direction is used as the pin 22, and the length L is slightly shorter than the length of the pin hole 21. When the pin hole 21 is press-fitted, a part of its peripheral surface protrudes inside the fitting hole 20 so as to be engageable with the mandrel 24 of the lever handle 23 inserted into the hole 20. The pin 2 has a slit 2 for promoting the elastic displacement.
5 is formed in the axial direction, and the slit 25 is disposed apart from an engagement position between the pin 22 and a mandrel described later, so as to promote the elastic displacement.

In this case, the pin 22 is not limited to a stainless steel pipe but may be formed of another metal steel pipe, or may be formed of a synthetic resin rod or a synthetic resin pipe capable of elastic displacement in the radial direction. Lighter weight and lower cost can be achieved. Further, the pin 22 is not limited to a circular or circular tube cross section, but may be formed of a polygonal cross section such as a triangle or a quadrangle, a modified cross section, or a tube of these.

In the figure, reference numeral 26 denotes a spring case, which is slidably disposed on the lock case 5,
7 is accommodated, biases the spring Ke <br/> over scan 26 rearward through the elasticity of the spring 27, the rear end the second arm 19
Can be engaged. 28, 29 and 30 is a pin projecting from the spring case 26 and inserted into through holes formed in the lock cover 6 (not shown), and crushed their upper ends, thereby enabling secure the lock cover 6 Of these, the pin 28 enables the rotation angle of the second arm 19 to be regulated.

Reference numerals 31 and 32 denote centering guide holes formed in the lock case 5, and a cam receiving hole (not shown) is provided therebetween. Reference numerals 33 and 34 denote centering guide holes formed in the lock cover 6. A cam accommodating hole 35 is formed at the same pitch as the centering guide holes 31 and 32 and is engageable with the rotating cam 17 therebetween.

Reference numeral 36 denotes a mounting hole formed at the end of the door 1,
The handle mounting seats 37 and 38 are disposed on the inner and outer surfaces of the door 1. The handle mounting seats 37 disposed on the outer surface of the door 1 are provided with a pair of pipe screws 3.
9 and 39 are projected, and these are aligned with the centering guide holes 33 and 3.
4, 31, 20 can be inserted. Further, a screw hole (not shown) is provided in the handle mounting seat 38 disposed on the inner surface of the door 1, and screws 55, 55 are inserted into the holes from outside, and are screwed into the pipe screws 39, 39.

The handle mounting seats 37, 38 are provided with handle insertion holes 40, 41, and handle mounting seat covers 42, 43 are mounted outside thereof, and handle insertion holes 44, 45 are provided therein. . Reference numeral 46 denotes a lever handle attached to the inside of the door 1, and a square hole 47 is formed in the shaft end surface thereof.
The mandrel 24 can be inserted, and a fixing screw 48 can be inserted into the end of the shaft. The fixing screw 48 is screwed into a cutout groove 49 of the mandrel 24. Reference numeral 50 denotes a vertically long rectangular front plate, in which screw holes 51, 51 are formed at upper and lower ends, and mounting screws 52 are inserted into these holes.
Through holes 53 into which latch bolt 10 can be inserted between
Are formed. In addition, in FIG.
In the driving recess formed near the opening end of the pin hole, the meat portion is pushed out to the opening edge of the pin hole 21 to prevent the pin 22 from coming off.

[0019] Figure 6 shows the actual施例of the present invention, implementation of the aforementioned
The same reference numerals are used for portions corresponding to the configuration of the embodiment . This embodiment, the inner surface center of the fitting hole of the pin holes 21 20
Forming position near the corners instead of engaging the circumferential surface of the pin 22 in the corner portion peripheral surface of the mandrel 24, pressing the mandrel 24 in place of the corner Tsunobeuchi surface of the fitting hole 20 In addition to stabilizing the mounting position of the mandrel 24, the tightness of the mandrel 24 is improved, and play of the mandrel 24 is strongly prevented.

The door lock constructed as described above uses the rotating cam 1
7 and a new pin 22 are required, and all the other parts are constituted by existing products. When modifying the rotating cam 17,
A pin hole 2 having a bottom along the axial direction at a position close to the fitting hole 20.
1 is formed, a side portion of the hole 21 is opened in the fitting hole 20, one end is opened in one end of the rotating cam 17, and the other end is closed inside the other end of the cam 17.

In this case, since the pin hole 21 can be dealt with by simple boring, the existing rotary cam 17 can be machined, and the existing product can be rationally used. In this case, it is sufficient that a mold is formed and molded. In this case, since the configuration of the pin hole 21 is simple as described above, the configuration of the mold is simple and the mold can be manufactured at low cost.

Therefore, unlike the related art, the mandrel is not required to form grooves or holes for this purpose, and the degree of modification is small, so that it is possible to respond to the modification promptly and to manufacture it at low cost. it can. Further, in the case of the embodiment, since the pin 22 can be supported by using a commercially available spring pin corresponding to the length of the pin hole 21, a complicated process of processing the spring material and manufacturing the elastic member as in the related art is required. The cost can be reduced and the cost can be reduced accordingly.

Next, when attaching the pin 22 to the rotating cam 17, the pin 22 is pressed into the pin hole 21 of the rotating cam 17 using a predetermined jig before assembling the lock 4. At this time, the slit 25 of the pin 22 is arranged apart from the engagement position between the pin 22 and the mandrel 24, and is press-fitted in this state. This situation is as shown in FIGS. 3 and 4, in which a part of the peripheral surface of the pin 22 protrudes from the inner surface of the fitting hole 20 and is press-fitted.
Is located at right angles to the AA line.

Thereafter, the rotating cam 17 into which the pin 22 is pressed is described.
Is inserted into a cam receiving hole (not shown) of the lock case 5, and the pin 22 is positioned on the front side as shown in FIG.
Position 9 inside pin 28. And lock case 5
And a spring case 26 is attached to the opposite side of the arm 19, and a cam spring 27 is inserted into the case 26.

Next, the latch shaft 11 is housed in the lock case 5 and its rear end is inserted into the cutout groove 18a.
The cam receiver 16 is positioned behind the first arm 18.
And the cushioning piece 14, the leg piece 14 a is arranged on the inner surface of the reinforcing piece 8, and the latch bolt 10 is arranged outside the latch hole 9. The state of assembly is as shown in FIG. 2 and the operation is the same as in the prior art, so that this can be easily performed.

After the assembling, the lock cover 6 is attached to the lock case 5, the pins 28 to 30 are inserted into pin holes (not shown) of the lock cover 6, and the tips protrude from the cover 6 and are inserted. The lock cover 6 is fixed to the lock case 5 by caulking and crushing via a predetermined jig.

In this case, one end of the rotating cam 17 on which the pin 22 is mounted is exposed in the cam receiving hole 35 of the lock cover 6. Therefore, a position close to the pin 22 is driven through a predetermined jig and a part of the opening edge of the pin hole 21 is extruded by the concave portion 54, and the pin 22 is
To keep it from falling out.

When the lock 4 assembled in this manner is mounted on the door 1, the lock 4 is inserted into the mounting groove 3, the reinforcing piece 7 is accommodated in the concave groove 2, and the front plate 50 is superimposed on the piece 7, and Insert the mounting screws 52, 52 into the screw holes 8, 51 of
The screw 4 is screwed into the mounting groove 3 to fix the lock 4 and the front plate 50 to the door 1.

Next, the handle mounting seat 37 is held, and the pipe screws 39, 39 are inserted into the centering guide holes 33, 34 exposed from the mounting hole 36 from outside the door 1. On the other hand, the handle mounting seat 38 is positioned at the opening of the mounting hole 36 from the inside of the door 1, and screws 55, 5 are inserted into its screw holes (not shown).
5 is screwed into the pipe screws 39, 39, and the handle mounting seats 37, 38 are fixed inside and outside the door 1.

Then, the handle mounting seat covers 42, 43 are mounted on the handle mounting seats 37, 38, the mandrel 24 of the lever handle 23 is inserted into the handle insertion holes 44, 40, and this is inserted into the fitting hole 20, and the leading end thereof is inserted. The mating hole 2
Project from 0.

In this manner, the mandrel 24 is inserted into the fitting hole 20.
Is engaged with the pin 22 projecting from the inner surface of the mandrel, and the pin 22 is compressed radially against its elasticity, allowing the mandrel 24 to enter and applying the restoring force to the peripheral surface of the mandrel 24. Then, the mandrel 24 is pressed against the inner surface of the fitting hole 20 on the side opposite to the pin 22 and is brought into close contact with the mandrel so that the play of the mandrel 24 in the fitting hole 20 is removed. In this case, since the slit 25 of the pin 22 is separated from the engagement position between the pin 22 and the mandrel 24, formation of the elastic displacement of the pin 22 is promoted, and the desired operation and effect can be obtained.

Next, the shaft portion of the lever handle 46 is inserted into the handle insertion holes 45, 41, and the square hole 47 is inserted into the fitting hole 2.
When the screw is inserted into the tip of the mandrel 24 protruding from the center rod 24, a fixing screw 48 is inserted into a screw hole (not shown), and this is screwed into a notch groove 49 of the mandrel 24.
3, 46 are connected.

In the lever handles 23, 46 attached in this manner, since the mandrel 24 is in close contact with the inner surface of the fitting hole 20 and play is prevented from occurring therebetween, the mandrel 24 and the rotating cam are prevented. 17 work together and latch bolt 1
0 moves forward and backward reliably and smoothly, and the locking and unlocking operation is performed reliably and smoothly.

In the above-described embodiment, the present invention is applied to a so-called box lock. However, the present invention is not limited to this example, and may be applied to a tube-type or cylinder-type lock.

[0035]

As described above, the door lock of the present invention has a pin
Composed of commercially available spring pins, special
If it can be manufactured at low cost without processing
In both cases, the peripheral surface of the spring pin can be engaged with the corner of the mandrel
The mandrel is positioned in the mating hole with a simple configuration.
It can be mounted tightly and firmly. In addition, the present invention
Has a bottom with a spring pin that can be pressed into the fitting hole.
The length of the spring pin is
It is formed shorter than the length and at the open end side of the pin hole.
Is provided in the vicinity of the punched portion, and the punched meat of the driven recess is provided.
Part to the opening edge of the pin hole to pull out the spring pin.
It is possible to stop it, and to make the retaining means simple and easy.
There is an effect that it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a basic embodiment of the present invention.

FIG. 2 is a front view showing a basic embodiment of the present invention, and shows a state where a lock cover is opened.

FIG. 3 is a front view showing an example of a rotating cam applied to the present invention.

FIG. 4 is a sectional view taken along the line AA in FIG. 3;

FIG. 5 is an exploded perspective view showing a main part of the present invention, and shows a mounting state of a rotating cam and a pin.

6 is a front view showing an essential part of the implementation of the present invention.

[Explanation of symbols]

 4 Lock 10 Latch bolt 17 Rotating cam 20 Fitting hole 22 Pin 23, 46 Lever handle 24 Mandrel 25 Slit

Claims (2)

(57) [Claims] 1. A rectangular cross section which is linked to a lever handle.
A rotary cam with a square fitting hole into which a mandrel can be inserted is provided.
Elastically displaceable in the radial direction facing the corner of the fitting hole
Function pin, and partially surround the pin into the fitting hole.
The mandrel was arranged to be engageable on the peripheral surface of the pin.
In the door lock, the peripheral surface of the spring pin is
Door lock, characterized in that mounted for engaging the parts. 2. A spring pin facing the fitting hole.
With a pin hole with a bottom that allows press-fitting
The length is made shorter than the length of the pin hole,
A driving recess is provided at a position near the opening end of the pin hole,
Extrude the punched meat portion of the driving recess into the opening edge of the pin hole,
2. The door lock according to claim 1 , wherein the pulling pin can be retained .