JPH09165957A - Latch type door lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the looseness of a knob and a handle for a door, and to smoothly and surely lock and release the door while using this lock device even for various type knobs and handles. SOLUTION: This lock device has a case 10 installed inside a door, a latch 20, which is stored movably in the case 10 and in which a front end section is projected and retreated freely from the case 10, a cam groove 24 formed to the latch 20, a moving means 30 engaged with the cam groove 24, an operating shaft 40, in which the moving means 30 is mounted at one end while the other end is penetrated into the through-hole of the door fixed onto a knob 3 for opening and closing the door, a coil spring 23 energizing the latch 20 in the direction of a front end at all times, and a striker 50 fastened on the main body side, to which the door is set up in a freely open-close manner, and engaged with the front end section of the latch 20. The operating shaft 40 is held movably in the through-hole of the door in the axial direction. A bush means 60 consisting of a guide bush 61 and a cylindrical guide 62 is disposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch-type door lock device provided on a door that can be opened and closed, such as furniture and cabinets. The present invention relates to a latch type door lock device that can lock and unlock a door and can be used for various types of knobs and handles.

[0002]

2. Description of the Related Art As a conventional technique of a latch type door lock device provided on an openable / closable door of furniture, cabinet, etc., there has been hitherto been known, for example, US Pat. No. 3,830,53.
There is a door opening and closing tool (Closure) described in No. 5. FIG.
FIG. 24 is an exploded perspective view showing the conventional latch type door lock device (door opening / closing tool), and FIG. 24 is a cross-sectional side view of a main part of the door lock device shown in FIG.

As shown in these figures, the conventional latch type door lock device has a housing 100 fixed inside the door 1 to be opened and closed, a housing movably housed in the housing 100, and a tip portion. It is composed of a latch 200 protruding and retracting from the housing 100.

The latch 200 is constantly urged in the distal direction by the coil spring 300, and the cam grooves 201 are formed on both side surfaces.
The end of the operating shaft 400 connected to the knob 3 is engaged. When the door 1 is closed, the latch 200 engages with the locking portion 500 attached to the main body 2 side of the furniture, cabinet, etc. to which the door 1 is attached,
It is designed to lock the door 1.

According to the conventional door lock device having such a structure, when the knob 3 of the door 1 is pulled toward you, the knob 3
Since the operating shaft 400 coupled to presses the cam groove 201 while moving in the cam groove 201, the latch 200 is moved in the housing 100 toward the rear end, and the engagement with the locking portion 500 is released, so that the door is released. 1 opens.

When the door 1 is closed, the tip of the latch 200 is again engaged with the locking portion 500 on the main body 2 side, whereby the door 1 is locked on the main body 2 side. As described above, according to the conventional latch type door lock device, the lock can be released only by pulling the knob of the door, and when the door is closed, the door is automatically locked.

[0007]

However, in such a conventional door locking device, there is a gap between the operating shaft connected to the knob for moving the latch and the through hole of the door through which the operating shaft penetrates. Therefore, there is a problem that rattling occurs when pulling the knob. In addition, since the operating shaft has an exposed screw for screwing with the knob on the shaft,
There was also a problem that the screw part rubbed against the through hole of the door when the door was opened and closed, and the door could not be opened and closed smoothly.

Generally, in order to prevent friction between the shaft-shaped member and a through hole through which the shaft-shaped member penetrates, a method of fitting a bush made of a metal cylinder for bearing into the through-hole is widely known. As for the latch type door lock device, a device using such a bush has been partially developed. However, even in the door lock device using the bush, friction and rattling between the inner circumference of the bush and the operating shaft still occur, and the above-mentioned conventional problems cannot be solved.

The present invention has been proposed in order to solve the problems of the prior art as described above, and eliminates rattling of the knobs / handles of the door to smoothly and reliably lock and unlock the door. With various types of knobs
An object of the present invention is to provide a latch type door lock device that can also be used as a handle.

[0010]

In order to achieve the above-mentioned object, a latch type door lock device according to claim 1 of the present invention is provided with a case mounted inside the door, and movably accommodated in the case. A latch whose tip portion can be retracted from the case, a cam formed on the latch, a moving means that engages with the cam, the moving means is attached to one end, and the other end is a knob for opening and closing the door. An operating shaft that is fixed to a handle and that penetrates the through hole of the door; a biasing unit that constantly biases the latch in the front end direction; and the latch that is fixed to the main body side where the door is openably and closably attached. A latch-type door lock device having a seat engaging with a tip end portion, wherein bushing means for holding the actuating shaft axially movably is disposed in a through hole of the door.

According to another aspect of the present invention, there is provided a latch type door lock device, wherein the bush means for movably holding the actuating shaft is a tubular guide bush fitted into the through hole of the door, and A cylindrical guide is movably engaged with the inner circumference and is wound around the outer circumference of the other end of the operating shaft.

According to the latch type door lock device of the present invention having such a structure, the door can be unlocked only by pulling the knob / handle of the door, and the door can be released by releasing the knob / handle. The door can be locked easily by only closing it. Further, since the operating shaft connected to the knob / handle is movably held by the bush means arranged on the door, rattling may occur in the knob / handle or friction between the operating shaft and the door may occur. Without any exception, the door can be opened and closed smoothly.

According to a third aspect of the present invention, in the latch type door lock device, a part between the guide bush and the tubular guide is provided.
A gap is formed along the moving direction of the tubular guide. According to the latch type door lock device of the present invention having such a configuration, when pulling out the handle of the door, when the balance of the pulling force of the handle is unbalanced, that is, in the moving direction of the guide bush and the tubular guide. Even if the shaft center is misaligned, the gap can absorb the misalignment,
You can open and close the door smoothly.

A latch type door lock device according to a fourth aspect of the present invention is a knob / handle having a plurality of door attachment portions, one attachment portion of which is the operating shaft of the first, second or third aspect. In addition to the bushing means, the other mounting portion has a biasing means interposed on one end side, and the other end side is a bolt that penetrates the through hole of the door and is screwed into the knob / handle.
The bolt is movably attached to the door while being constantly urged inwardly of the door by the urging means.

According to a fifth aspect of the present invention, there is provided a latch type door lock device, wherein bush means for holding the bolt movably in the axial direction is arranged in a through hole of a door through which a bolt screwed to the knob / handle is passed. It is a set up configuration.

Further, in the latch type door lock device according to a sixth aspect of the present invention, the bush means for movably holding the bolt is fitted into the through hole of the door, and has a tubular shape having two communicating chambers. Of the guide bush and a tubular guide that is movably engaged in the knob / handle room of the guide bush and is wound around the outer circumference of the other end of the bolt. Is configured such that a biasing means interposed on one end side of the bolt is disposed.

Further, in the latch type door lock device according to a seventh aspect of the present invention, the guide bush is formed so as to be openable and closable along the axial direction.

Further, in the latch type door lock device according to the present invention, a bushing means for movably holding the bolt is a tubular guide bush fitted in a through hole of the door, and a knob of the guide bush. .A ring member having a diameter smaller than that of the head portion of the bolt, which is fitted to the end portion on the side opposite to the handle, and the head portion of the bolt is movably disposed in the guide bush through biasing means. There is a configuration.

According to the latch type door lock device having such a structure, the knob / handle bolt having the biasing means is provided on the other side of the plurality of mounting portions of the knob / handle, thereby providing the knob / handle. Since the other side can be pulled with almost the same resistance as the side on which the actuating shaft is arranged, it can be used for large knobs and handles, and the door can be opened and closed smoothly.

In the present invention, the term "knob / handle" is a generic term for members provided on doors of furniture, cabinets, etc., which are gripped when the doors are opened and closed.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a latch type door lock device of the present invention will be described below with reference to the drawings. First Embodiment First, a first embodiment of the latch type door lock device of the present invention will be described. FIG. 1 is an overall exploded perspective view showing a latch type door lock device of this embodiment. FIG. 2 is a front view of the lock device with the door locked, and FIG. 3 is a front view of the lock device shown in FIG.

FIG. 4 is a side view showing a state in which the door of the lock device is locked, and FIG. 5 is a side view of the main lock device shown in FIG. 6 is
FIG. 4 is a cutaway side view of the main part of the BB line in FIG. Further, FIG. 7 is a side view of the main locking device shown in FIG. 5 in a released state, and FIG. 8 is a side view of the main locking device shown in FIG. 6 in a released state.

As shown in these figures, the latch type door lock device of this embodiment includes a case 10 fixed inside the door 1 to be opened and closed, and a latch 20 movably accommodated in the case 10. The operating shaft 40 is connected to the knob 3 by being screwed into the knob 3 of the door 1, and is provided with a moving means 30 for moving the latch 20 and an operating shaft 40. . Then, the latch 20 engages with the receiving seat 50 provided on the main body 2 side of the furniture, cabinet, etc. to which the door 1 is openably and closably attached, so that the door 1 is locked to the main body 2 side. There is.

The case 10 is in the shape of a hollow casing, both side surfaces of which constitute a pair of guide walls 11 facing each other, and the upper surface of which is a stopper wall which connects one end sides of the pair of guide walls 11. It is 12. As shown in FIGS. 5 to 8, an insertion hole 13 for inserting the actuating shaft 40 is formed on the front side of the case 10. Case 1
The back side of 0 and the bottom side facing the stopper wall 12 are opened, and the latch 20 can be housed in the case 10 through this opening.

The insertion hole 13 is, as shown in FIGS.
The case 10 is formed in a slender bowl shape that narrows inside, and the narrowest part has a diameter smaller than the head of the operating shaft 40. As a result, the operating shaft 40, which is press-fitted from the narrowest portion of the insertion hole 13 and inserted into the case 10, prevents the head from coming into contact with the inside of the insertion hole 13 and coming out of the case 10. There is. Therefore, it is desirable that at least the front side portion of the case 10 be formed of a member having a certain elasticity, for example, plastic.

Further, flanges 14 are formed on both side edges of the bottom opening of the case 10 in the side direction. As shown in FIGS. 1 to 3, screw holes 14a through which fixing screws penetrate are formed in the flange 14 at a plurality of positions (two positions on one side in this embodiment, a total of four positions). 10 for the door 1
It is a fixing part for fixing to the inner surface of the. A back plate 15 is fitted into the back opening of the case 10 accommodating the latch 20 and functions as a pressing plate for the latch 20 stored. At the center of the back plate 15, a long hole-shaped through hole 15a through which the operating shaft 40 freely passes is formed.

Further, the pair of guide walls 11 of the case 10
As shown in FIGS. 1 and 3, the opposite surface of the case 10
A pair of guide grooves 11a is formed from the front to the back. Further, as shown in FIG. 3, ribs 11b for guiding the latches 20 housed in the case 10 are formed in the pair of guide walls 11 in the same direction as the guide grooves 11a.

Thus, by forming the rib 11b of the ridge on the inside of the guide wall 11, the latch 2 accommodated therein is provided.
It prevents rattling between 0 and latch 2
By reducing the contact area between 0 and the guide wall 11, the friction between the latch 20 and the guide wall 11 is reduced.

The latch 20 is movably accommodated between the pair of guide walls 11 of the case 10, and the lower end of the latch 20 can be retracted from the bottom opening facing the stopper wall 12 of the case 10. As shown in FIGS. 1 and 5 to 8, the lower end portion of the latch 20 has a shape in which the front side of the case 10 is formed in a curved shape and the back side of the case 10 has a step portion 21, This step 2
1 engages with the receiving seat 50 on the main body side 2.

Further, at the upper end portion of the latch 20, a spring accommodating portion 22 for accommodating the coil spring 23 is provided. The coil spring 23 is housed in the spring housing 22 so that the coil spring 23 is interposed between the upper end of the latch 20 housed in the case 10 and the stopper wall 12 of the case 10 so that the latch 20 has a constant elastic force. Is a biasing means that always biases downward (toward the seat 50). The coil spring 23 is an example of an urging means, and may be an elastic body such as a leaf spring as long as it can urge the latch 20 with a constant elastic force.

A pair of substantially V-shaped cam grooves 24, which are open to the case 10, are formed on both sides of the latch 20 at approximately the center in the longitudinal direction. This cam groove 24
Comes into contact with a contact portion 33 of the moving means 30, which will be described later, and converts the movement of the contact portion 33 from the front side to the back side of the case 10 into the upward movement of the latch 20.
This is for allowing the tip of the above to protrude from the bottom surface of the case 10.

Therefore, although the cam groove 24 is formed in a substantially V-shape in the present embodiment, even if the cam groove 24 has a shape other than this, it is a concave portion having a slope inclined downward of the latch 20. The shape of the moving means 30 is not limited to the V shape as long as it can change the direction of the movement of the moving means 30 to the movement of the latch 20. The upper end of the cam groove 24 is
It is formed as a stopper portion 24a having no inclination so that the contact portion 33 of the moving means 30 can abut and lock.

Further, the pair of cam grooves 2 of the latch 20
4, a through hole 25 penetrating from the case 10 side to the opposite side is bored in a substantially central portion so that the operating shaft 40 can penetrate therethrough. The through hole 25 is formed in a long hole shape that is long in the vertical direction of the case 10 so that the operating shaft 40 can move in the vertical direction in the case 10 of the latch 20.

The moving means 30 has a through hole 31 at the center through which the operating shaft 40 penetrates, and the case 10 and the case 1
It is arranged between the latches 20 stored in 0. A pair of guide grooves 11 of the case 10 are provided at both ends of the moving means 30.
A pair of guide portions 32 that movably engage with a is provided in a protruding manner, and the latch 2 is provided inside the pair of guide portions 32.
A pair of contact portions 3 that come into contact with and engage with a pair of 0 cam grooves 24
3 are formed. As shown in FIG. 1, the pair of contact portions 33 are formed to have a curved shape in the latch 20 side direction so that the contacting cam groove 24 can be smoothly pushed.

The operating shaft 40 is a shaft-like member having a head portion 41 at one end, and has a shaft portion 42 at the other end side. It has a bolt shape. Further, in the operating shaft 40, the shaft portion 42 penetrates the through hole 31 of the moving means 30, and the head portion 41
Is in contact with the peripheral edge of the through hole 31.

Further, in the operating shaft 40, the shaft portion 42 penetrates the through hole 1a formed in the door 1 through the through hole 25 of the latch 20 and the through hole 15a of the back plate 15, and the screw of the penetrating tip is used. The part is screwed and fixed to the knob 3,
It is designed to be connected to the knob 3.

The seat 50 is fixed to the main body side 2 to which the door 1 is attached by screwing or the like, and a stopper portion 51 with which the step portion 21 of the latch 20 is engaged is projected upward. Corresponding to the shape of the latch 20 described above, the stopper portion 51 is formed such that the front surface side of the case 10 is curved and the rear surface side of the case 10 can engage with the step portion 21 of the latch 20. There is.

The bush means 60 is a cylindrical guide bush 61 as shown in FIG. 9, which is fitted in the inner circumference of the through hole 1a formed in the door 1, and is movably engaged with the inner circumference of the guide bush 61. It is composed of a cylindrical guide 62 that fits.

The guide bush 61 has a through hole 1a in the door 1.
It is formed to have an outer diameter that fits in the press-fitted state, and the inner circumference is formed to have an octagonal cross section. Further, in this embodiment, a plurality of protrusions having a saw-toothed longitudinal cross-section are formed on the entire outer periphery of the guide bush 61, and the protrusions extend in the direction opposite to the press-fitting direction of the guide bush 61. It is prevented from falling off.

Further, on the outer periphery of the guide bush 61,
A plurality of protrusions 61a are provided in the longitudinal direction so that the guide bush 61 does not rotate in the through hole 1a.

The tubular guide 62, which is movably engaged with the guide bush 61, is a tubular member through which the operating shaft 40 penetrates, as shown in FIG. 10 or 11, and which penetrates the operating shaft 40. By doing so, the threaded portion of the operating shaft 40 is wound around the tubular guide 62.

The outer circumference of the cylindrical guide 62 has an octagonal shape corresponding to the inner circumference of the guide bush 61.
The tubular guide 62 is designed so as not to rotate around the axis. The tubular guide 62 wound around the outer periphery of the operating shaft 40 can smoothly move in the guide bush 61 in the axial direction according to the movement of the operating shaft 40.

Further, as shown in FIG. 10 or 11, the end portion of the tubular guide 62 on the distal end side of the operating shaft 40 has a large diameter dish shape, and a plurality of protrusions 62a are formed on the dish surface. It is projected. The protrusion 62a cuts into the bottom surface of the knob 3 fixed to the tip of the actuating shaft 40, thereby preventing the knob 3 from rotating.

The shape and the like of the protrusion 62a are not particularly limited as long as they can bite into the bottom surface of the knob 3. For example, even if the protrusion 62a has a pierced shape shown in FIG. 12 or a wedge-shaped shape shown in FIG. May be The material of the guide bush 61 and the tubular guide 62 is preferably plastic or the like so that the tubular guide 62 can move smoothly.

Next, a procedure for assembling the latch type door lock device of the present embodiment having the above-mentioned structure and attaching it to the door will be described. First, the pair of guide grooves 11a of the case 10
The guide portion 31 of the moving means 30 is engaged with the moving means 3
0 is stored in the case 10.

Next, the spring accommodating portion 22 of the latch 20.
Then, the coil spring 23 is stored. In this state, the latch 20 is housed and assembled between the pair of guide walls 11 of the case 10, and the back plate 1 is attached to the back side of the case 10.
5 is fitted and the latch 20 in the case 10 is pressed down.

On the other hand, the through hole 1a is formed in the door 1 by using a tool such as a drill. Then, the guide bush 61 is press-fitted into the through hole 1a, and the tubular guide 62 is engaged with the press-fitted guide bush 61. At this time, since the head portion on the tip side of the tubular guide 62 has a dish shape, this head portion serves as a stopper, and the tubular guide 6
The whole 2 stops in a state where it is engaged in the guide bush 61.

Next, the operating shaft 40 is inserted through the insertion hole 13 on the front side of the case 10, and the through hole 3 of the moving means 30 is inserted.
1, through hole 25 of latch 20 and through hole 1 of back plate 15
5a and penetrates into the tubular guide 62 inside the guide bush 61. Then, the tip of the operating shaft 40 is screwed onto the knob 3 and fixed.

In this state, a fixing screw is passed through the flange 14 of the case 10, and the screw is screwed and fixed at a predetermined position of the door 1. As a result, this device is attached to the inside of the door 1. At this time, the receiving seat 50 is also fixed to the corresponding position on the main body side 2.

Next, the operation of the latch type door lock device of the present embodiment thus mounted will be described. First, as shown in FIGS. 2 to 6, when the door 1 is closed,
Since the biasing force of the coil spring 23 constantly acts on the latch 20, the tip of the latch 20 projects outward from the bottom opening of the case 10, and the step portion 21 engages with the stopper portion 51 of the receiving seat 50. The door 1 is locked to the main body side 2.

At this time, the moving means 30 has the guide portion 3
2 engages with the guide groove 11a of the case 10, and the contact portion 33 abuts on the stop portion 24a of the cam groove 24. Therefore, even if the biasing force of the coil spring 23 acts on the latch 20, It does not fall outside of 10.

Next, when the knob 3 is pulled toward the front to open the door 1, the actuating shaft 40 connected to the knob 3 moves, whereby the moving means 30 is pulled toward the front side. When the moving means 30 is pulled, the guide portion 32 is guided by the pair of guide grooves 11a of the case 10, and the guide groove 1
The inside of 1a is moved to the front side (see FIGS. 7 and 8). At this time, since the operating shaft 40 is movably held in the axial direction by the bushing means 60, it can be pulled smoothly without any rattling or interference with the through hole 1a of the door 1.

When the moving means 30 moves, the contact portion 33 of the moving means 30 pushes the cam groove 24 of the latch 20 and the latch 20 moves upward against the biasing force of the coil spring 23. As a result, the latch 20 and the seat 5
The engagement with 0 is released, the door 1 is unlocked, and the door 1 is opened. Then, when the knob 3 is released, the coil spring 2
The biasing force of 3 causes the latch 20 to return to the state of protruding from the bottom surface of the case 10 again.

Then, when the door 1 is closed in this state, the curved surface portion of the tip end portion of the latch 20 comes into contact with the curved surface portion of the stopper portion 51 of the seat 50, but by further pushing the door 1, the latch 20 is received. It slips over the stopper 51 of the seat 50 and moves upward against the biasing force of the coil spring 23. Then, when the vehicle has passed over the seat 50, the latch 20 again projects from the case 10 and engages with the seat 50, and the door 1 is locked.

As described above, according to the latch type door lock device of the present embodiment, the door 1 can be unlocked only by pulling the knob 3 of the door 1, and the knob 3 is released to close the door 1. Only then, the door 1 can be easily locked.
Since the operating shaft 40 connected to the knob 3 is movably held by the bushing means 60, the knob 3 does not rattle or friction with the door 1, and is smooth. The door is opened and closed.

[Second Embodiment] Next, a second embodiment of the latch type door lock device of the present invention will be described. FIG. 12 is an overall exploded perspective view showing the latch type door lock device of the present embodiment, and FIG. 13 is an overall exploded perspective view showing a state where a handle mounting portion on the other side of the present lock device shown in FIG. 12 is exploded. is there. Further, FIG. 14 is a plan sectional view showing a state in which the door of the present locking device is locked, and FIG. 15 is a plan sectional view showing a state in which the lock is released.

In the latch type door lock device of this embodiment, both ends of the handle 3 are bent toward the door 1 to form a substantially U shape.
Both ends of each are attached to the door 1. That is, the latch type door lock device of the above-described first embodiment is arranged at one mounting portion of the handle 3 to the door 1, and the handle 3 is movable in the front direction.

The other mounting portion of the handle 3 is
A bolt 70 screwed to the tip of the handle 3 and the bolt 7
It is composed of a through hole 1b formed in the door 1 through which 0 penetrates and a bush means 80 provided in this through hole 1b. A coil spring 90 is arranged between the bolt 70 and the bush means 80. There is.

The bolt 70 is a shaft-shaped member having a head portion 71 at one end, and a screw is formed at the tip of a shaft portion 72 on the other end side. The screw portion of the shaft portion 72 is the other end of the handle 3. It is designed to be screwed and fixed to the tip of the mounting part. The bush means 80 includes a guide bush 81 press-fitted into the through hole 1b of the door 1 and a tubular guide 82 wound around the shaft portion 72 of the bolt 70 and engaged with the guide bush 81.

As shown in FIG. 13, the guide bush 81 has a tubular shape having two chambers communicating with each other, and the tubular guide wound around the bolt 70 is provided in the chamber 81a on the handle 3 side. 82 is movably engaged.

The other room 81 of the guide bush 81
A coil spring 90 inserted into the shaft portion 72 of the bolt 70 is disposed in b, and the coil spring 90 is
Head 72 of bolt 70 and these two chambers 81a, 81b
And the handle 3 is always attached to the door 1 while being biased toward the inside of the door 1.

As a result, the handle 3 can be moved to the front side with a constant elastic force at both of the mounting portions. The bushing means 8 of the present embodiment
In order to make the mounting work easy, the guide bush 81 is divided into two along the axial direction, as shown in FIG.
It is formed so that it can be opened and closed. Further, a part of the outer circumference of the guide bush 81 is formed with a protrusion for preventing the same from the guide bush 61 of the first embodiment.

As described above, according to the latch type door lock device of the present embodiment, the bolt 70 having the coil spring 90 is provided on the attachment portion on the other side of the handle 3,
The other side portion of the handle 3 can also be pulled with substantially the same resistance as the side on which the operating shaft 40 is arranged. As a result, the handle 3 can be pulled toward the front in a well-balanced manner without twisting or the like occurring between the shaft-shaped members.

The latch type door lock device of this embodiment can be applied not only to the illustrated handle but also to a large knob which requires a plurality of mounting portions.

[Third Embodiment] Next, a third embodiment of the latch type door lock device of the present invention will be described. FIG. 16 is an overall exploded perspective view showing the latch type door lock device of the present embodiment, and FIG. 17 is an overall exploded perspective view showing a state in which the handle mounting portion of the present lock device shown in FIG. 16 is further disassembled.

18 to 20 are enlarged exploded perspective views showing the bushing means used in this embodiment. FIG.
FIG. 22 is a plan cross-sectional view of the lock device of the present embodiment with the door locked, and FIG. 22 is an enlarged plan cross-sectional view of the lock device shown in FIG. Yes,

As shown in these figures, the latch-type door lock device of this embodiment is a modification of the above-described second embodiment, and is a mounting portion of the U-shaped handle 3 to the door 1. The bushing means 60 and 80 are modified.

That is, first, the bush means 60 at one mounting portion of the handle 3 forms a gap 62b in a part between the guide bush 61 and the tubular guide 62 along the moving direction of the tubular guide 62. There is. As shown in FIGS. 17 and 18, the bushing means 60 of the present embodiment has substantially the same configuration as that of the above-described first and second embodiments.
It is composed of a cylindrical guide bush 61 fitted into the inner periphery of the through hole 1a formed in the above, and a cylindrical guide 62 movably engaged with the inner periphery of the guide bush 61.

A portion of the tubular guide 62 having a length of approximately 2/3 on the handle 3 side is formed to have a diameter smaller than the inner diameter of the guide bush 61 along the moving direction, and the inner circumference of the guide bush 61 is A gap 62b is formed between them.

According to the bushing means 60 of this embodiment having such a structure, the axial guide 1/3 portion of the tubular guide 62 is in sliding contact with the inner circumference of the guide bush 61. As in the case of the second embodiment, rattling of the handle 3 when the tubular guide 62 is moved can be prevented. On the other hand, the remaining 2/3 of the length of the tubular guide 62 is not in contact with the inner circumference of the guide bush 61, and a gap 62b is formed.

By thus forming the gap 62b at a part between the cylindrical guide 62 and the guide bush 61, when pulling out the handle 3, the force of pulling the handle 3 is unbalanced and the guide Bush 61 and tubular guide 62
Even if the axial center of the moving direction of the
Thus, the shift can be absorbed, and the door 1 can be smoothly opened and closed.

Incidentally, the cylindrical guide 62 and the guide bush 6
In the present embodiment, the portion of the gap 62b of 1 is set to ⅔ of the moving direction of the tubular guide 62, but it is not particularly limited to this. That is, it is possible to increase or decrease the axial length of the gap 62b in accordance with the size of the door 1 or the handle 3 using the lock device.

On the other hand, the bush means 80 at the other mounting portion of the handle 3 is constituted by a guide bush 83 capable of integrally accommodating one end side of the bolt 70 screwed to the handle 3. That is, as shown in FIG. 17, FIG. 19, and FIG. 20, the bush means 80 for movably holding the bolt 70 in this embodiment is the tubular guide bush 8.
3 and a ring member 84 that fits into the opening on one end side of the guide bush 83.

The guide bush 83 is a cylindrical member which is fitted into the through hole 1b of the door 1 as in the case of the above-described second embodiment, and is provided on one side, that is, on the side where the handle 3 is attached. , A through hole 8 having a diameter substantially the same as the diameter of the shaft portion 72 of the bolt 70.
3a is formed, and the head 71 of the bolt 70 is provided with a coil spring 90 as an urging means from the opening on the other side.
The side can be stored.

Then, the ring member 84 is fitted into the other end opening of the guide bush 83. The ring member 84 is formed in a ring shape having a smaller diameter than the head 71 of the bolt 70, and has an outer diameter of a size that can be fitted into the opening on the other end side of the guide bush 83.

In this embodiment, as shown in FIG. 20, in order to facilitate fitting into the guide bush 83, the ring member 84 is formed in a C ring shape having a slit, and projections are provided at two locations on the outer periphery thereof. 84a is projected, on the other hand,
An engagement hole 83b with which the protrusion 84a is engaged is formed in the inner periphery of the opening on the other end side of the guide bush 83. As a result, the ring member 84 can be inserted into the opening of the guide bush 83 while being bent inward,
The elasticity of 4 itself and the engagement of the projection 84a with the engagement hole 83b allow the guide bush 83 to be fitted easily.

The bush means 80 of this embodiment as described above.
According to this, before attaching the handle 3 to the door 1, the bolt 70
Is inserted from the opening on the other end side of the guide bush 83 into the shaft portion 72 with the coil spring 90 interposed, and stored.
In this state, by fitting the ring member 84 to the guide bush 83, the guide bush 83 and the bolt 70
Can be integrated.

As a result, the ring member 84 is attached to the bolt 70.
Since the diameter is smaller than that of the head portion 71, the bolt 70 does not fall off the guide bush 83. Therefore, there is no fear that the bolt 70 or the coil spring 90 will be lost, and the work of attaching the lock device to the door 1 and the storage before the attachment are extremely convenient.

It is also possible to dispose the cylindrical guide 82 in the second embodiment described above in the portion of the through hole 83a of the bolt 70 of the bush means 80 of this embodiment. That is, by making the through hole 83a portion of the guide bush 80 thick and elongated and forming the diameter so that the tubular guide 82 can be engaged, the tubular guide 82 is movably arranged as in the second embodiment. It is possible to set.

[0080]

As described above, according to the latch type door locking device of the present invention, rattling of the door knob and handle can be eliminated, and the door can be locked and unlocked smoothly and surely. It is possible to use various types of knobs and handles.

[Brief description of the drawings]

FIG. 1 is an overall exploded perspective view showing a latch type door lock device according to a first embodiment of the present invention.

FIG. 2 is a front view of the latch type door lock device according to the first embodiment of the present invention with the door locked.

FIG. 3 is a front view in which a case portion of the lock device shown in FIG. 2 is cut off.

FIG. 4 is a side view of the latch type door lock device according to the first embodiment of the present invention with the door locked.

5 is a side view of the latch type door lock device shown in FIG. 4 taken along the line AA in FIG.

6 is a side view of the latch type door lock device shown in FIG. 4 taken along the line BB in FIG.

FIG. 7 is a side view of the latch type door lock device shown in FIG. 5 in a released state.

FIG. 8 is a side view of the latch type door lock device shown in FIG. 6 in a released state.

FIG. 9 is an overall exploded perspective view showing bushing means of the latch type door lock device according to the first exemplary embodiment of the present invention.

FIG. 10 is an overall perspective view showing an example of a tubular guide of the latch-type door lock device according to the first exemplary embodiment of the present invention.

FIG. 11 is an overall perspective view showing an example of a tubular guide of the latch type door lock device according to the first embodiment of the present invention.

FIG. 12 is an overall exploded perspective view showing a latch type door lock device according to a second embodiment of the present invention.

13 is an overall exploded perspective view of a state where a handle attaching portion on the other side of the latch type door lock device shown in FIG. 12 is exploded.

FIG. 14 is a plan cross-sectional view of the latch type door lock device according to the second embodiment of the present invention with the door locked.

FIG. 15 is a plan cross-sectional view of the latch type door lock device according to the second embodiment of the present invention in a state where the lock is released.

FIG. 16 is an overall exploded perspective view showing a latch type door lock device according to a third embodiment of the present invention.

FIG. 17 is an overall exploded perspective view of the latch-type locking device according to the third embodiment of the present invention, in which the handle mounting portion is further disassembled.

FIG. 18 is an enlarged exploded perspective view showing a bushing unit used in the latch type locking device according to the third embodiment of the present invention.

FIG. 19 is an enlarged exploded perspective view showing a bushing unit used in the latch type locking device according to the third embodiment of the present invention.

FIG. 20 is an enlarged exploded perspective view showing bush means used in the latch type locking device according to the third embodiment of the present invention.

FIG. 21 is a cross-sectional plan view of the latch type lock device according to the third embodiment of the present invention with the door locked.

FIG. 22 is an enlarged plan sectional view in a locked state showing the other mounting portion to the door of the latch type locking device according to the third exemplary embodiment of the present invention,

FIG. 23 is an overall exploded perspective view showing a conventional latch type door lock device.

FIG. 24 is a side sectional view of a conventional latch type door lock device in a state where the door is locked.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Door 2 ... Main body 3 ... Knob / handle 10 ... Case 11 ... Guide wall 12 ... Stopper wall 15 ... Rear plate 20 ... Latch 23 ... Coil spring 24 ... Cam groove 30 ... Moving means 32 ... Guide part 33 ... Contact part 40 ... Operating shaft 50 ... Receiving seat 60 ... Bushing means 61 ... Guide bushing 62 ... Cylindrical guide 62a ... Gap 70 ... Bolt 80 ... Bushing means 81 ... Guide bushing 82 ... Cylindrical guide 83 ... Guide bushing 84 ... Ring member 90 ... Coil spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuo Ito 6-4-5 Kameido, Koto-ku, Tokyo Ota Manufacturing Co., Ltd.

Claims (8)

[Claims] 1. A case attached to the inside of a door, a latch movably accommodated in the case, and a tip of which is retractable from the case, a cam formed on the latch, and a cam engaged with the cam. The moving means to be fitted, the moving means attached to one end, and the other end fixed to a knob / handle for opening / closing the door, the operation shaft penetrating the through hole of the door, and the latch always in the front end direction. Urging means for urging, and the door is fixed to the main body side which is openably and closably attached,
A latch-type door lock device comprising a seat engaging with the latch tip portion, wherein bush means for holding the operating shaft movably in the axial direction is provided in a through hole of the door. A characteristic latch-type door lock device. 2. A bushing unit for movably holding the actuating shaft, a tubular guide bush fitted in a through hole of the door, and a bushing member movably engaged with an inner circumference of the guide bush, The latch type door lock device according to claim 1, comprising a tubular guide wound around the outer periphery of the other end of the operating shaft. 3. The latch type door lock device according to claim 2, wherein a gap is formed in a part between the guide bush and the tubular guide along the moving direction of the tubular guide. 4. A knob / handle having a plurality of attachment parts to a door, wherein one attachment part comprises the actuating shaft and the bush means according to claim 1, 2 or 3, and the other attachment part comprises: A biasing means is provided on one end side, and the other end side is composed of a bolt that penetrates through the through hole of the door and is screwed into the knob / handle, and the bolt is always biased toward the inside of the door by the biasing means. A latch-type door lock device, which is movably attached to the door while being urged. 5. The latch type door lock device according to claim 4, wherein a bushing means for holding the bolt movably in the axial direction is provided in a through hole of a door through which a bolt screwed to the knob / handle is passed. . 6. A cylindrical guide bush having two chambers communicating with each other, and a bushing means for movably holding the bolt, the bushing being fitted in a through hole of the door, and a knob / handle for the guide bushing. And a cylindrical guide that is movably engaged in the other chamber and is wound around the outer periphery of the other end of the bolt, and the other chamber of the guide bush is attached to the one end of the bolt. The latch type door lock device according to claim 5, wherein a biasing means is provided. 7. The latch type door lock device according to claim 6, wherein the guide bush is formed so as to be openable and closable along the axial direction. 8. Bushing means for movably holding the bolt is fitted to a cylindrical guide bush fitted into the through hole of the door and an end portion of the guide bush opposite to the knob / handle. 6. The latch type door lock device according to claim 5, comprising a ring member having a diameter smaller than that of the head portion of the bolt, and the head portion of the bolt being movably disposed in the guide bush via a biasing means.