JPH08312226A - Lock device for opening and closing door - Google Patents

Abstract

PURPOSE: To prevent an opening and closing door from unpreparedly opening by a vibration such as earthquake by pulling an operation handle to release the locked state through a link mechanism, and further pulling the operation handle to open the opening and closing door. CONSTITUTION: An opening and closing door 10 is held by a door frame 21 in such a manner as to be openable and closable around a shaft. Lock arms 60a, 60b are held in such a manner as to be capable of sliding in the axial direction of the opening and closing door 10 to a base. Lock grooves 71a, 17b are formed on the door frame 21, the tip parts of the lock arms 60a, 60b are fitted thereto to lock the opening and closing door 10 in the close position. A handle 80 is held in such a manner as to be capable of sliding in the opening and closing direction of the opening and closing door 10 to the base. When the opening and closing door 10 is opened, the operation handle 80 is held and pulled to this side, whereby the tip parts of the lock arms 60a, 60b are retreated from the lock grooves 71a, 71b through a link mechanism 90. Therefore, the locked state is released, and when the operation handle 80 is further pulled to this side, the opening and closing door 10 is rotated around the shaft and opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device for an opening / closing door of furniture, etc.
The door does not open accidentally due to vibration such as an earthquake, and the locked state can be easily released when the door is released.

[0002]

2. Description of the Related Art Conventionally, as a lock device for an opening / closing door of this kind, an operating handle is rotatably supported on the front surface of the opening / closing door so as to be rotatable in the vertical direction, and the operating handle is rotated upward from below. The tip of the lock arm protruding into the lock groove on the door frame side is retracted from the lock groove (for example, Japanese Utility Model Publication No. 51-49276 and Japanese Utility Model Publication 55-55).
No. 22140, Jpn. Pat. Appln. KOKAI No. 3-23497).

[0003]

However, in the above-mentioned conventional locking device for the opening / closing door, the operating handle is rotated from the lower side to the upper side to release the locked state, and thereafter,
You have to open the open / close door by pulling it toward you by holding the operation handle, and two-step operation is required. Not only is it troublesome to open the open / close door, but it cannot be opened quickly. There was a problem.

Therefore, the invention according to claim 1 is made in view of the problems of the above-mentioned conventional technique, and the purpose thereof is to open the opening / closing door easily.
Moreover, it is an object of the present invention to provide a lock device for an opening / closing door that can be quickly performed. The invention according to claim 2 has the following object in addition to the object of the invention according to claim 1 described above.

That is, the invention according to claim 2 is to provide a lock device for an opening / closing door provided with a link mechanism having a simple structure. The invention according to claim 3 is
In addition to the above-mentioned object of the invention according to claim 1 or claim 2, the following objects are intended. That is, the invention according to claim 3 is to provide a lock device for an opening / closing door that prevents the opening / closing door from being opened accidentally.

[0006]

The present invention is to achieve the above-mentioned object, and the contents thereof will be described below with reference to the embodiments shown in the drawings. The invention according to claim 1 is characterized by having the following six configurations. That is, the first is an opening / closing door (10), and the opening / closing door (10) is held by a door frame (21) so as to be openable and closable around an axis (for example, a hinge 30) as shown in FIG. There is.

The second is a base (50). This base (50)
Is fixed to the opening / closing door (10), for example, as shown in FIG. Thirdly, the lock arms (60a, 60b) are slidable in the axial direction of the opening / closing door (10) with respect to the base (50) as shown in FIG. 1, for example. Held in.

The fourth is a lock groove (71a, 71b). The lock groove (71a, 71b) is, for example, as shown in FIG.
The lock arm (60a, 60b) is formed in (21), and the tip end portion of the lock arm (60a, 60b) is fitted into the lock arm (60a, 60b) to lock the opening / closing door (10) in the closed position. Fifth is the operation knob (80), and this operation knob (80)
For example, as shown in FIG. 1, the base (50) is held slidably in the opening / closing direction of the opening / closing door (10).

The sixth is a link mechanism (90). The link mechanism (90) is, for example, as shown in FIG. 1, the operation knob (80).
Is pulled toward the front side in the opening direction of the open / close door (10), the front end of the lock arm (60a, 60b) is locked to the lock groove (71a,
It retreats from 71b). The invention described in claim 2 is characterized in that, in addition to the features of the invention described in claim 1, the link mechanism (90) has the following two configurations.

The first is a pin (87). This pin (87) is, for example, as shown in FIG. 3, one of the lock arms (60a, 60b) and the operating knob (80) (for example, the operating knob). It is protruding from the slider 81 of 80. Second is the cam groove (65a, 65b)
As shown in FIG. 3, the cam grooves (65a, 65b) are provided on the other side of the lock arms (60a, 60b) and the operation knob (80) (for example, the cam plate 61 of the lock arms 60a, 60b).
a, 61b), the pin (87) is fitted, and when the operation knob (80) is pulled toward the opening direction of the opening / closing door (10), the lock arm (60a, The front end portion of 60b) is retracted from the lock grooves (71a, 71b).

The invention according to claim 3 is the above-mentioned claim 1.
Alternatively, the invention is characterized by the following points in addition to the characteristic points of the invention of claim 2. That is, biasing means (for example, the protruding spring 10
2a, 102b), the biasing means (for example, the projecting springs 102a, 102b) is provided with a lock groove (71a, 71b) which is always provided with a tip end portion of the lock arm (60a, 60b) as shown in FIG. Is something to rush into.

[0012]

[Operation] Therefore, according to the invention of claim 1,
It has the following effects. That is, in order to open the opening / closing door (10), for example, as shown in FIGS.
Hold (80) and pull it toward you. When the operation knob (80) is pulled toward you, as shown in FIGS.
The tip of the lock arm (60a, 60b) is retracted from the lock groove (71a, 71b) via (90).

Therefore, when the locked state is released and the operation knob (80) is pulled further toward the front, the opening / closing door (10) rotates about the shaft and opens. According to the invention of claim 2,
In addition to the action of the invention described in claim 1, the following action is exhibited. That is, when the operation knob (80) is pulled toward you, as shown in FIG. 6, for example, the pin (87) moves the cam groove (65).
a, 65b) to move the lock arm (60a, 60b
The tip of b) is retracted from the lock grooves (71a, 71b).

According to the invention of claim 3, in addition to the operation of the invention of claim 1 or claim 2, the following operation is achieved. That is, the tip end of the lock arm (60a, 60b) normally protrudes into the lock groove (71a, 71b) by the urging force of the urging means (for example, the protruding springs 102a, 102b) as shown in FIG. Therefore, it is possible to prevent the opening / closing door (10) from being opened accidentally.

Also, biasing means (for example, the protruding spring 10)
2a, 102b) also has an effect of surely causing the tip ends of the lock arms (60a, 60b) to project into the lock grooves (71a, 71b) when the open / close door (10) is closed from the open state to the closed position.

[0016]

1 to 9 show an embodiment of the present invention. 1 is a vertical cross-sectional view of the lock device, FIG. 2 is a perspective view of furniture showing a mounting position of the lock device, FIG. 3 is an exploded perspective view of the lock device, FIG. 4 is a front view of the lock device, and FIG. Correspondingly, FIG. 4 is a vertical cross-sectional view, and FIG. 6 is an explanatory view showing the operating state of the link mechanism, where FIG. 6 (a) shows the locked state of the locking device and FIG. FIG. 7 is a partially enlarged view of FIG. 5, FIG. 8 is a perspective view showing an assembled state of the lock device, FIG. 9 corresponds to FIG. 4, and is a front view of FIG.

In FIG. 2, 10 indicates an opening / closing door, and this opening / closing door
Reference numeral 10 is attached to a door frame 21 of a housing 20 such as furniture via a hinge 30 so as to be openable and closable. The illustrated door 10
Is a double-opening type, but may be a single-opening type. Further, although the opening / closing door 10 is used for furniture, the opening / closing door 10 is not limited to furniture and can be widely used for the opening / closing door 10 of office equipment, electric appliances and the like.

Further, in FIG. 1, reference numeral 40 denotes a lock device for locking the opening / closing door 10 in the closed position. The locking device 40 is roughly composed of the following five parts as shown in FIG. The first is the base 50, which is
As shown in FIGS. 4 and 5, it is fixed to the opening / closing door 10.

The second is a pair of upper and lower lock arms 60a, 60b.
The upper and lower lock arms 60a and 60b are vertically symmetrical with respect to the base 50, as shown in FIGS. The lock arms 60a and 60b are held slidably with respect to the base 50 in the axial direction of the opening / closing door 10, that is, in the vertical direction. Third, a pair of upper and lower lock boxes 70a, 70b. The upper and lower lock boxes 70a, 70b are
As shown in FIGS. 4 and 5, a vertically symmetrical structure is formed around the base 50. Each lock box 70a, 70b
Includes lock grooves 71a, 71b that are fixed to the upper and lower sides of the door frame 21, respectively, and the tip ends of the upper and lower lock arms 60a, 60b are fitted into the lock frames to lock the open / close door 10 at the closed position.

The fourth is an operation knob 80. This operation knob 80
As shown in FIGS. 4 and 5, is held slidably with respect to the base 50 in the opening / closing direction of the opening / closing door 10, that is, the front-back direction. The fifth is a link mechanism 90, which locks up and down when the operating knob 80 is pulled toward the opening direction of the opening / closing door 10 as shown in FIGS. The arms 60a, 60b are slid in the direction of approaching each other, and the respective tip portions are respectively retracted from the upper and lower lock grooves 71a, 71b.

As shown in FIG. 3, the base 50 has a box shape as a whole and is fixed to the opening / closing door 10 with screws or the like.
Box-shaped case 51 with the front open, and this case 51
And a cover 52 for closing the open front surface of the.
Then, the cover 52 uses the left and right claws 53 to cover the case 51.
It is fixed with one touch. The upper and lower lock arms 60
As shown in FIG. 3, a and 60b are upper and lower cam plates 61a and 61b that form a part of the link mechanism 90, and upper and lower cam plates 61a and 61b that fit in the lock grooves 71a and 71b of the upper and lower lock boxes 70a and 70b, respectively. Strikers 62a, 62b and upper and lower cam plates 61a, 6
It is composed of upper and lower connecting rods 63a and 63b which connect the 1b and the corresponding upper and lower rods to each other.

As shown in FIG. 3, a pair of upper and lower male screw portions are provided at the upper and lower ends of the connecting rods 63a and 63b, and the cam plates 61a and 61b and the strikers 62a and 62b are connected to each other.
A female screw portion into which each male screw is screwed is formed on each. Then, by screwing each male screw part into each female screw part,
As shown in FIGS. 4 and 5, the three parts of the cam plates 61a and 61b, the strikers 62a and 62b, and the connecting rods 63a and 63b are connected to each other. In addition, as the connecting means, in addition to the screw, one of the concavo-convex portions that fit into each other may be formed so that the connecting can be performed with one touch.

The upper and lower strikers 62a and 62b are slidably held by upper and lower slide frames 100a and 100b fixed to the opening / closing door 10, as shown in FIGS. As shown in FIG. 3, the upper and lower slide frames 100a and 100b are respectively formed with through holes 101a and 101b that vertically penetrate through the strikers 62a and 62b.

Further, in the respective slide frames 100a, 100b, as shown in FIG. 7, upper and lower strikers 62a, 62b are provided.
The upper and lower lock springs 70a and 70b house the upper and lower projecting springs 102a and 102b as biasing means for normally thrusting the lock boxes 70a and 70b into the respective lock grooves 71a and 71b. The upper and lower projecting springs 102a and 102b are attached to the upper and lower strikers 62
Compressed between a and 62b and spring retainers 103a and 103b fixed to upper and lower slide frames 100a and 100b, respectively. Therefore, the upper and lower strikers 62a, 62b are normally urged by the compressive restoring force of the projecting springs 102a, 102b in the directions of thrusting into the respective lock grooves 71a, 71b of the upper and lower lock boxes 70a, 70b. There is. The biasing means is not limited to the projecting springs 102a and 102b, but a leaf spring, a coil spring, or the like may be used.

On the other hand, as shown in FIG. 3, inclined portions 64a and 64b inclined rearward and diagonally are formed at the respective tip portions of the upper and lower strikers 62a and 62b. Inclined parts 64a, 64b
Locks the upper and lower lock boxes 70a,
The action of being pushed by the edges of the lock grooves 71a, 71b of the 70b to move the upper and lower strikers 62a, 62b in the directions toward each other against the compression restoring force of the projecting springs 102a, 102b against the biasing force. is there.

As shown in FIG. 3, the operation knob 80 is held in the base 50 so as to be slidable in the front-rear direction, and forms a slider 81 forming another part of the link mechanism 90, and the surface of the opening / closing door 10. The knob portion 82 protruding from the slider 81 and the slider 81.
And a gripping portion 82 and a connecting shaft 83 that connects the gripping portion 82 to each other. As shown in FIG. 3, front and rear end portions of the connecting shaft 83 are provided with a pair of front and rear male screw portions, and a knob portion 82 is formed with a female screw portion into which a front male screw is screwed, and the female screw portion is screwed in. With connecting shaft 83 and knob
It connects with 82. Further, in the slider 81, the case 51 and the cover 52, a hole through which the male screw portion on the rear side of the connecting shaft 83 passes is formed, and after passing the male screw portion on the rear side in the order of the cover 52, the slider 81, and the case 51, A bolt 84 is screwed into the protruding end of the male screw portion to connect the slider 81 and the connecting shaft 83. In addition, as the connecting means, in addition to the screw, one of the concavo-convex portions that fit into each other may be formed so that the connecting can be performed with one touch.

As shown in FIG. 6, a return spring 85 is passed through the connecting shaft 83. The return spring 85 is a cylindrical spacer 85 through which the connecting shaft 83 passes.
And the slider 81 is compressed. Since the spacer 85 is fixed to the opening / closing door 10 in an embedded manner, the slider 81 is biased rearward by the compression restoring force of the return spring 85. Therefore, since the knob 82 is also connected to the slider 81 via the connecting shaft 83, it is normally biased backward. It should be noted that not only the return spring 85 but also a leaf spring, a coil spring, or the like may be used.

As shown in FIG. 7, the upper and lower lock boxes 70a and 70b are fixed to the upper and lower opening edges of the door frame 21 of the housing 20 in an embedded manner by using screws or the like. Further, the lock grooves 71a, 71b of the upper and lower lock boxes 70a, 70b are formed in a U-shaped cross section. As shown in FIG. 3, the link mechanism 90 is formed on the upper and lower cam plates 61a, 61b while the pair of left and right pins 87, 87 protruding from both the left and right sides of the slider 81 and the left and right pins 87 are fitted respectively. The cam grooves 65a and 65b are inclined obliquely.

Next, the operation of the lock device 40 having the above structure will be described below. As shown in FIGS. 4 and 5, to open the open / close door 10 in the closed state,
Hold 82 and pull it toward you as shown in FIG. 6 (b). When the grip portion 82 is pulled toward you, the slider 81 moves forward, and the pins 87 on the left and right of the slider 81 move along the cam grooves 65a and 65b of the upper and lower cam plates 61a and 61b, as shown in FIG. 6B. As a result, the upper and lower strikers 62a and 62b move in a direction in which they approach each other. Therefore, the upper and lower strikers 62a,
62b is the upper and lower lock box 7 as shown in FIGS.
It retreats from the lock grooves 71a and 71b of 0a and 70b.

In this way, the lock state of the lock device 40 is released, and when the grip portion 82 is pulled further toward you, the opening / closing door 10
Opens while rotating around hinge 30. Next, when closing the open / close door 10, the open / close door 10 may be pushed toward the door frame 21 of the housing 20. When the open / close door 10 is pushed, the inclined portions 64a, 64b of the upper and lower strikers 62a, 62b come into contact with the edges of the lock grooves 71a, 71b of the upper and lower lock boxes 70a, 70b.

Here, if the opening / closing door 10 is pushed further in,
The inclined portions 64a, 64b of the upper and lower strikers 62a, 62b are pushed by the edges of the respective lock grooves 71a, 71b of the upper and lower lock boxes 70a, 70b and once retracted. And the upper and lower strikers 62
The inclined portions 64a, 64b of a, 62b are the upper and lower lock boxes 70a,
70b pass through the edges of the lock grooves 71a, 71b,
When it reaches the positions of a and 71b, as shown in FIGS. 4 and 5, the compression restoring force of the projecting springs 102a and 102b causes the projecting springs to project again into the respective lock grooves 71a and 71b.

Therefore, the locking device 40 is again locked, and the opening / closing door 10 can be prevented from being opened inadvertently even when furniture is shaken or falls due to vibration such as an earthquake. In the embodiment shown in the drawings, the lock arms 60a, 60b and the lock boxes 70a, 70b are arranged above and below,
Only one of the top and bottom may be used.

Although the opening / closing door 10 is configured to be opened and closed by the left and right hinges 30, the hinges are arranged in the vertical direction,
The opening / closing door 10 may be opened / closed in the vertical direction.

[0034]

Since the present invention is constituted as described above, it has the following effects. Claim 1
According to the described invention, the following effects are exhibited. That is, according to the invention as set forth in claim 1, it is possible to provide a lock device for an opening / closing door that can be opened easily and quickly.

According to the invention of claim 2, in addition to the effect of the invention of claim 1 described above, the following effect is exhibited. That is, according to the invention described in claim 2, it is possible to provide a lock device for an opening / closing door including a link mechanism having a simple structure. According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2,
The following effects are obtained.

That is, according to the invention of claim 3,
It is possible to provide a lock device for an opening / closing door that prevents the opening / closing door from being opened accidentally.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a lock device.

FIG. 2 is a perspective view of furniture showing a mounting position of a lock device.

FIG. 3 is an exploded perspective view of a lock device.

FIG. 4 is a front view of a lock device.

5 is a vertical cross-sectional view of FIG. 4 corresponding to FIG.

FIG. 6 is an explanatory view showing an operating state of the link mechanism,
The figure (a) shows the locked state of the locking device, and the figure (b) shows the unlocked state.

FIG. 7 is a partially enlarged view of FIG.

FIG. 8 is a perspective view showing an assembled state of the lock device.

9 is an exploded perspective view of the front view locking device of FIG. 1 corresponding to FIG. 4;

[Explanation of symbols]

10 Open / close door 20 Enclosure 21 Door frame 30 Hinge 40 Lock device 50 Base 51 Case 52 Cover 53 Claw 60a, 60b Lock arm 61a, 61b Cam plate 62a, 62b Striker 63a, 63b Connecting rod 64a, 64b Inclined part 65a, 65b Cam Grooves 70a, 70b Lock box 71a, 71b Lock groove 80 Operation knob 81 Slider 82 knob 83 Connection shaft 84 Bolt 85 Return spring 86 Spacer 87 Pin 90 Link mechanism 100a, 100b Slide frame 101a, 101b Through hole 102a, 102b For protrusion Spring 103a, 103b Spring retainer

Claims (3)

[Claims] 1. An opening / closing door held in a door frame so as to be openable / closable about an axis, a base fixed to the opening / closing door, and a lock held so as to be slidable in the axial direction of the opening / closing door with respect to the base. An arm and a lock groove formed in the door frame, which locks the opening / closing door to a closed position by fitting the tip of the lock arm, and an operation held slidably in the opening / closing direction of the opening / closing door with respect to the base. A lock for an opening / closing door, comprising a knob and a link mechanism for retracting the tip of the lock arm from the lock groove when the operation knob is pulled toward the opening direction of the opening / closing door. apparatus. 2. The link mechanism is formed on a pin protruding from either one of the lock arm and the operation knob, and on the other of the lock arm and the operation knob, and the pin is fitted into the link mechanism, and the operation knob is opened and closed. The opening / closing door locking device according to claim 1, further comprising: a cam groove for retracting a tip end portion of the lock arm from the lock groove when pulled toward the front side in the opening direction of the door. 3. The lock device for an opening / closing door according to claim 1, further comprising an urging means for causing the tip end portion of the lock arm to always project into the lock groove.