WO2009118958A1

WO2009118958A1 - Cabinet with flap door, and door latch device therefor

Info

Publication number: WO2009118958A1
Application number: PCT/JP2008/072048
Authority: WO
Inventors: 吹本　理
Original assignee: 株式会社岡村製作所
Priority date: 2008-03-28
Filing date: 2008-12-04
Publication date: 2009-10-01

Abstract

A door latch device of simple structure exhibiting good operability in a cabinet with a flap door, and a cabinet with a flap door which can be adjusted easily depending on the operating force of a user. A latch lever (22) is pivoted on the lower front portion of a cabinet body (7) through a rotary shaft (23) that turns to the right and left directions, a latching portion (27a) is made to engage with or disengage from the latch pin (26) of a door (8) when the door is closed, and a torsion coil spring (11) for urging the latching portion (27a) in the direction for engaging with the latch pin (26) is provided in the cabinet body (7). The extension (11c) of the torsion coil spring (11) engages selectively with a plurality of latching pieces (18) provided in an arm (12) for supporting the door (8) and changes the urging force of the torsion coil spring.

Description

Flap door cabinet and door latch device therefor

The present invention relates to a cabinet with a flap door in which a front opening is turned upward to open, and a door latch device in the cabinet.

In office spaces such as offices, in order to improve storage efficiency, a small cabinet is often arranged above a desk or other furniture.
In such cabinets, as a door for opening and closing the front opening, a flap door that is opened by lifting the lower end portion forward and upward is used (see, for example, Patent Documents 1 and 2).

In this type of cabinet with a flap door, when an impact is applied to the cabinet due to an earthquake or the like, the door opens to the cabinet housing to prevent the door from unintentionally opening and the contained articles from falling. An engaging latch device is provided (Patent Documents 1 and 2).

Moreover, in order to be able to open the door with light force, the door is biased upward with a gas spring (Patent Documents 3 and 4), or the tension coil spring is biased upward. (Patent Documents 5 and 6) and the like.
JP 2003-235661 A JP 2003-239604 A JP 2003-106036 A JP 2003-230434 A JP 2006-299533 A JP 2007-151987

However, in the latch device in the cabinet with a flap door described in

Patent Documents

1 and 2, since the latch lever is provided on the door, the total weight of the door is increased and the operability is deteriorated.
In addition, when an urging means for supporting the vertical movement of the door is provided, the urging force of the urging means for urging the door upward according to the weight of the door must be increased, resulting in an increase in cost. It is a factor of.

Furthermore, the cabinets described in Patent Documents 3 to 6 must be prepared in different types with different lengths in the left-right direction in order to cope with the situation of the part to be attached. If the length of the door in the left-right direction is different, its weight will also fluctuate.Therefore, you must select or design a gas spring or tension coil spring that urges the door upward to match the weight. In addition, other types of gas springs and tension coil springs having different urging forces must be prepared.

In view of the above-mentioned problems of the conventional technology, the present invention can reduce the weight of the door with a simple structure, reduce the urging force of the urging means of the door, and reduce the cost. An object of the present invention is to provide a door latch device in a cabinet with a flap door, which can be operated easily.

Another object of the present invention is to provide a cabinet with a flap door in which the urging force of the urging means can be easily adjusted according to the weight of the door, the user's favorite operation force, or the like. .

According to the present invention, the above problem is solved as follows.
(1) In a cabinet with a flap door, which opens the door that opens and closes the front opening in a box-shaped cabinet main body with the front opening from the closed position facing upward and downward, and opens the lower end forward and upward. A latch lever having an operation part at the lower end is pivotally attached to the front lower part of the latch with a turning shaft directed in the left-right direction so that the operation part can turn in the front-rear direction below the bottom plate of the cabinet body. The locking portion of the lever can be engaged with and disengaged from the engaged portion of the door when the door is closed, and further, the cabinet body is urged toward the direction in which the locking portion is engaged with the engaged portion. First urging means is provided.

With such a configuration, there is no need to provide a latch lever on the door, so the door can be reduced in weight, and the urging force of the first urging means of the door can be reduced to reduce the cost. In addition, since the operation portion of the latch lever is located below the bottom plate in the cabinet body, the operability of the latch lever is good and the structure is simple, so that it can be manufactured at low cost.

(2) In the above item (1), the latch lever operating part is provided over almost the entire length of the cabinet body in the left-right direction.

¡With such a configuration, the latch release operation can be performed at any position when the latch is released, so that operability and usability are good.

(3) In the above item (1) or (2), a recess groove is provided in the front of the bottom surface of the bottom plate of the cabinet body so as to be recessed upward, and an operation portion of the latch lever is provided in the recess groove. It is arranged to be rotatable in the front-rear direction.

With such a configuration, the operating portion of the latch lever is accommodated in the recessed groove, and the latch lever cannot be seen from the front, so the appearance is good.

(4) In any one of the above items (1) to (3), the latch lever is separated into a latch lever body having an operation portion and a locking member having a locking portion, and the locking member is used as a latch lever. With respect to the main body, it is linked so as to be capable of relative rotation about a predetermined angle around the rotation axis, and the locking portion is engaged by the engaged portion during the door closing operation, and within the relative rotation angle, the disengagement direction So that the locking portion of the locking member is engaged with the engaged portion.

With such a configuration, when the door is closed, the engaged portion can automatically engage with the locking portion of the locking member, and the rotation of the locking member at that time causes the latch lever to rotate. It can be prevented from being transmitted to the operation unit. Further, even when the movement of the operation portion of the latch lever is restricted by the locking device or the like, the door can be closed without any trouble.

(5) Above the closing position where the front opening of the cabinet body is closed by the support arms pivotally attached to both side plates of the cabinet body, the door that opens and closes the front opening of the box-shaped cabinet body with the front opening. In a cabinet with a flap door that supports the door so that it can be rotated and opened, and has a second urging means that urges the door in the opening direction, the second urging means is The winding portion in which the wire is spirally wound is loosely fitted to the pivot portion of the support arm, and one extension portion of the wire extending from the winding portion is used as a side plate and the other extension portion. The torsion coil spring that is biased in the direction of opening the door by engaging the support arm with the support arm, and the extension portion of the torsion coil spring is selectively engaged with at least one of the side plate and the support arm. To stop More, providing a plurality of locking holes so as to be changed the biasing force of the torsion coil spring.

With such a configuration, the urging force of the torsion coil spring can be greatly changed stepwise by selectively locking the extension portion of the torsion coil spring in the plurality of locking holes. The urging force of the second urging means can be easily adjusted according to the weight of the door, the user's favorite operating force, or the like.
Therefore, the same torsion coil spring can be used in common for a cabinet provided with a plurality of types of doors having different lengths in the left-right direction and accompanying weight.

(6) Above the closed position where the front opening of the cabinet body is closed by the support arms pivotally attached to the both side plates of the cabinet body, the door that opens and closes the front opening in the box-shaped cabinet body with the front opening. In a cabinet with a flap door that supports the door so that it can be rotated and opened, and has a second urging means that urges the door in the opening direction, the second urging means is The winding portion in which the wire is spirally wound is loosely fitted to the pivot portion of the support arm, and one extension portion of the wire extending from the winding portion is used as a side plate and the other extension portion. Torsion coil springs that are biased in the direction of opening the door by locking to the support arm, and at least one of the side plate and the support arm is provided with an end of the extension part of the torsion coil spring. Change the force Is provided with a fine adjustment fitting 17 having a guide groove for guiding in the direction of movement, and the fine adjustment fitting 17 is adjusted so that the end of the extension portion of the torsion coil spring guided by the guide groove is moved along the guide groove. Install screws.

With such a configuration, by rotating the adjustment screw and moving the end of the extension portion of the torsion coil spring along the guide groove of the fine adjustment fitting, the urging force of the torsion coil spring can be continuously increased. Therefore, the urging force of the second urging means can be easily adjusted according to the weight of the door, the operation force desired by the user, or the like.
Therefore, the same torsion coil spring can be used in common for a cabinet provided with a plurality of types of doors having different lengths in the left-right direction and accompanying weight.

(7) Above the closing position where the front opening of the cabinet body is closed by the support arms pivotally attached to both side plates of the cabinet body, the door that opens and closes the front opening of the box-shaped cabinet body with the front opening. In a cabinet with a flap door that supports the door so that it can be rotated and opened, and has a second urging means that urges the door in the opening direction, the second urging means is The winding portion in which the wire is spirally wound is loosely fitted to the pivot portion of the support arm, and one extension portion of the wire extending from the winding portion is used as a side plate and the other extension portion. Torsion coil spring that urges the door in the direction of opening by locking to the support arm, and the extension part of the torsion coil spring is selectively locked to either the side plate or the support arm. By letting A plurality of locking holes are provided so that the urging force of the helical coil spring can be changed, and the end of the extension part of the torsion coil spring is urged to the other of the side plate and the support arm. Is provided with a fine adjustment fitting 17 having a guide groove that guides in a direction that can be changed, and an end portion of the extension portion of the torsion coil spring guided by the guide groove is provided on the fine adjustment fitting 17 along the guide groove. Provide an adjustment screw to be moved.

With such a configuration, the biasing force of the torsion coil spring can be greatly changed stepwise by selectively locking one extension portion of the torsion coil spring to the plurality of locking holes. At the same time, the adjustment screw is rotated so that the end of the other extension of the torsion coil spring is moved along the guide groove of the fine adjustment fitting, thereby accurately adjusting the urging force of the torsion coil spring steplessly. Thus, the urging force of the second urging means can be adjusted greatly and precisely in accordance with the weight of the door, the user's favorite operation force, and the like.
Therefore, the same torsion coil spring can be used in common for a cabinet provided with a plurality of types of doors having different lengths in the left-right direction and accompanying weight.

(8) In the above (5) or (7), a plurality of locking holes are provided side by side on the same circumference centering on the pivot axis of the support arm.

With such a configuration, it is possible to know the degree of change in the urging force of the second urging means only by looking at the interval between the plurality of locking holes and the order in which they are arranged, and the adjustment work of the urging force Becomes easier.

(9) In any one of the above items (5), (7), and (8), a plurality of locking holes are provided in a plurality of rows along a plurality of circumferences having different radii around the pivot axis of the support arm.

This configuration greatly expands the range in which the urging force can be changed.

(10) In any of the above items (5) to (9), a recess is formed on the upper edge of the front part of the support arm so that when the door is opened, the front end of the top plate of the cabinet body is fitted. Provide.

With such a configuration, the door can be greatly opened upward.

According to the present invention, the door can be reduced in weight with a simple structure, the urging force of the urging means of the door can be reduced, the cost can be reduced, and the operability is improved. A door latch device in a cabinet can be provided.
Further, the urging force of the urging means can be easily adjusted according to the weight of the door, the user's favorite operation force, or the like.

It is a perspective view of a desk with a cabinet provided with one embodiment of the present invention. Similarly, it is a disassembled perspective view which removes the outer side board of a cabinet and shows the internal structure. Similarly, it is an exploded perspective view of a left and right support arm and a latch lever. Similarly, it is a side view which shows the state at the time of closing of a cabinet when an outer side board is removed. Similarly, it is a side view when the door is opened to the fully open position. It is an expansion disassembled perspective view of the A section in FIG. Similarly, it is an enlarged exploded perspective view of the assembled state.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view of a cabinet-equipped desk including an embodiment of the present invention.
The desk 1 includes a pair of left and

right side legs

2 and 2, a top plate 3 provided on the both

side legs

2 and 2, and a horizontal connecting material that is connected to the upper rear end of each side leg 2 and faces in the left and right direction 4 is formed between the rear end of the top plate 2 and the lateral connection member 4, and a wiring duct 4a for accommodating wiring of OA equipment or the like is formed, and both left and right side portions in the wiring duct 4a A pair of left and

right support columns

5 and 5 are erected, and a cabinet 6 with a flap door is supported by both

support columns

5 and 5. In the illustrated example, one cabinet 6 is supported by both

supports

5 and 5, but a plurality of cabinets may be arranged in the left-right direction and supported by both

supports

5 and 5.

The cabinet 6 includes a horizontally long box-shaped cabinet body 7 that is long in the left-right direction, and a flap-type door 8 that opens and closes the front opening of the cabinet body 7. The door 8 is configured to be opened by lifting the lower end forward and upward from a closed position facing in the vertical direction by a configuration as described later.

The left and

right side plates

9 and 9 in the cabinet body 7 have a hollow double wall structure composed of an outer plate 9a and an inner plate 9b, and a support arm and a balance mechanism that support the door 8 so that it can be opened and closed. Is housed.

2 is an exploded perspective view showing the internal structure of the right side plate 9, FIG. 3 is an exploded perspective view showing the left and right support arms and a latch lever, and FIG. 4 is the outside plate removed and the door closed. 5 is a side view when the door is opened, FIG. 6 is an enlarged exploded perspective view of the left part of the latch lever, and FIG. 7 is an enlarged exploded perspective view of the assembled state.

As shown in FIGS. 2 to 5, a boss 10 protrudes outwardly at a position slightly rearward and upward from the center of each inner plate 9b. A large-diameter torsion coil spring 11 as an urging means is loosely fitted, and the center of rotation of the support arm 12 supporting each side end of the door 8 forms a pivot at the center of the front end surface of the boss 10. A stepped screw 13 is pivotally attached.

As shown in FIG. 4, the door 8 is configured such that the front end portions of the pair of left and

right support arms

12, 12 abut against the rear surfaces of the lower portions on both sides of the door 8 and are fixed with a plurality of tapping screws 14. 7, between a closed position for closing the front opening of 7 and a fully opened position raised above the cabinet body 7 as shown in FIG. The cabinet body 7 is pivotally supported.

A chamfered cutout 7a is provided at the front upper part of the cabinet body 7 so that the door 8 can be opened largely with a short turning radius. A side-view wedge-shaped closing member 15 for closing the notch 7a is fixed.
Further, the upper edges of the left and

right support arms

12, 12 are provided with a recess 12a in which the front end of the top plate 7b of the cabinet body 7 is fitted when the door 8 is opened to the fully open position. Even with such a configuration, the door 8 can be greatly opened with a short turning radius. Note that the upper front edge of the inner plate 9b provided with the notch 7a and the front end surface of the top plate 7b are arcs or strings close to an arc whose radius is the shortest distance from the stepped screw 13 that is the pivot to the door 8. Is preferable.

When the door 8 is in the closed position, the door 8 comes into contact with the front end of the bottom plate 16 in the cabinet body 7. The bottom end of the bottom plate 16 is gently lowered downward from the lower end of the door 8 at the closed position. The inclined surface 16a which inclines is provided, and the recessed groove 16b of the left-right direction recessed in upper direction is provided in the lower surface front part of the baseplate 16 in the back of the inclined surface 16a.

The torsion coil spring 11 includes a winding portion 11a in which a wire is wound in a spiral shape, and both extending

portions

11b and 11c in which both ends of the wire are extended in a tangential direction from the winding portion 11a. From the front end of the upper surface of the fine-adjustment metal fitting 17 fixed to the inner plate 9b, the bent end portion 11d obtained by bending the distal end portion of one extending portion 11b in a direction away from the center of the winding portion 11a is rearward. The bent end portion 11e, which is fitted in the guide groove 17a provided toward the outside and the front end portion of the other extension portion 11c is bent toward the outer plate 9a side, is centered on the stepped screw 13 in the support arm 12. The door 8 is urged in the opening direction by selectively fitting into any one of the plurality of locking holes 18 provided on the same circumference.

The fine adjustment bracket 17 has a central portion in the vertical direction protruding outward in a U-shaped cross section, and an adjustment screw 19 is provided in a screw hole (not shown) provided in the rear end wall of the protruding portion facing in the front-rear direction. By screwing from the rear, the front end of the adjusting screw 19 is brought into contact with the bent end portion 11d of the torsion coil spring 11, and the adjusting screw 19 is rotated, whereby the bent end portion 11d is moved along the guide groove 17a. The initial biasing force of the torsion coil spring 11 can be increased by pushing forward, increasing the initial biasing force of the torsion coil spring 11, or loosening the adjusting screw 19 to move the bent end portion 11d rearward. It is like that.
In the illustrated example, the guide groove 17a is directed in the front-rear direction. However, when the bent end portion 11d of the torsion coil spring 11 moves along the guide groove 17a, the initial biasing force of the torsion coil spring 11 is increased. Any direction may be used as long as it can be changed.

Further, by fitting the bent end portion 11 e of the torsion coil spring 11 into the lower locking hole 18, the initial biasing force of the torsion coil spring 11 can be increased. By fitting, the initial biasing force can be weakened.
In the illustrated embodiment, the plurality of locking holes 18 are provided in a single row on the same circumference centered on the stepped screw 13, but the radii centered on the stepped screw 13 are different. A plurality of rows may be provided along a plurality of circumferences.
In this case, the initial biasing force of the torsion coil spring 11 can be increased by fitting the bent end portion 11e into the lower locking hole 18 provided on the circumference having a large radius.

Thus, by adjusting the initial biasing force of the torsion coil spring 11 significantly and finely, it is possible to cope with various doors 8 having different weights, and to attach the torsion coil spring 11 to the weight of the door 8. When the force is balanced so that the door 8 can be opened and closed with light force, or when the biasing force of the torsion coil spring 11 is set larger than the weight of the door 8 and the latch lever is operated to be released later, the door 8 is moved to the torsion coil spring 11. The urging force can be automatically opened to the fully open position.

In particular, the length of the door 8 in the left-right direction must be different depending on the left-right width of the desk 1 as well as the length of the cabinet body 7 in the left-right direction. 11 having a different wire diameter, number of turns, etc., would be complicated to design, but the torsion coil spring 11 is the same, and the mounting method can be changed to various doors 8 having different weights. When it becomes possible, the design becomes easier, and the members between different products can be shared, which contributes to the reduction of the total cost.

The fine adjustment fitting 17 may be provided in the support arm 12 and the plurality of locking holes 18 may be provided in the inner plate 9b, and either the fine adjustment fitting 17 or the plurality of locking holes 18 is omitted. May be implemented.

A step 12b provided on the upper edge of the intermediate portion of the support arm 12 is brought into contact with the rear upper portion of the inner plate 9b immediately before the door 8 reaches the fully open position. Is provided with a damper 20 that prevents the motor from rotating beyond the fully open position. The damper 20 normally protrudes forward by an urging force of a built-in spring (not shown) or the like, and immediately before the door 8 reaches the fully open position, the stepped portion 12b of the support arm 12 comes into contact and is retracted. A damper pin 21 is provided.

A latch lever 22 that locks the door 8 at the closed position and releases the locked state is provided at the front lower portion of the cabinet body 7.
The latch lever 22 passes through the left and right

inner plates

9b, 9b and protrudes in the left and right directions. The rotating shaft 23 faces in the left-right direction, and the cylindrical portion 24a is fitted to both ends of the rotating shaft 23. And a pair of left and right

rotating levers

24, 24 that spread downward in a side view across the bottom plate 16 from the outer end of the cylindrical portion 24a, and lower ends of the left and right

rotating levers

24, 24. Both side ends are fixed, and are disposed in a recessed groove 16b provided on the lower surface of the bottom plate 16 so as to be rotatable in the front-rear direction. Between the formed operation rod 25 (operation part), the inner plate 9b and the cylinder part 24a of the rotation lever 24, it is pivotally attached to the rotation shaft 23 and linked with the cylinder part 24a with a required play, And at the tip, the support arm 12 And a locking member 27 having a hook-shaped engaging portion 27a which can engage and disengage the locking pin 26 is engaged portion projecting from the front outer side.

One of the inner end surface of the cylindrical portion 24a of the rotating lever 24 and the opposing surface of the locking member 27 (the locking member 27 in the example shown in the figure) is a circle centered on the rotating shaft 23. An arc-shaped long hole 28 is provided, and a pin 29 that fits into the long hole 28 projects from the other facing surface (in the illustrated example, the inner end surface of the cylindrical portion 24a).
Due to the engagement between the long hole 28 and the pin 29, the locking member 27 is linked with the cylindrical portion 24a so as to be able to rotate relative to the cylindrical portion 24a by a predetermined angle around the rotation shaft 23.

A torsion coil spring 30 as an urging means (first urging means) of the locking member 27 is fitted around the rotation shaft 23 between the inner plate 9b and the locking member 27. One extending portion 30b of the wire extending in the tangential direction from the winding portion 30a in the torsion coil spring 30 is brought into contact with the upper surface of the bottom plate 16, and the other extending portion 30c of the wire is bent appropriately. Then, the locking member 27 is locked to the rear upper edge of the locking member 27, and the locking member 27 is engaged with the locking pin 26 on the door 8 side in the closed position by the torsion coil spring 30. 4 and FIG. 5 is biased toward the locking position indicated by the solid line.

Immediately before the door 8 closes to the closing position, the locking member 27 is brought into sliding contact with the locking pin 26, and the locking member 27 resists the biasing force of the torsion coil spring 30. An inclined edge 27b is provided so that the lever 27a can be completely detached from the locking pin 26 and can be rotated to the unlocking position indicated by a two-dot chain line in FIGS.

As shown by solid lines in FIGS. 4 and 5, when the operating rod 25 is located at the inoperative position located directly below the rotation shaft 23, a stopper pin protruding from the inner surface of the rotation lever 24. 31 abuts against the upper surface of the bottom plate 16 to prevent the operation rod 25 from rotating backward. At this time, a finger can be inserted behind the operation rod 25 in the recessed groove 16 b of the bottom plate 16. Similarly, a space for moving the operating rod 25 forward is formed in front of the operating rod 25.

At this time, as shown in FIG. 7, the pin 29 is in contact with or close to the upper end edge of the long hole 28 of the locking member 27 located at the locking position. When the flange 25 is rotated forward to the operating position indicated by a two-dot chain line in FIG. 5, the pin 29 rotates the upper edge of the long hole 28 in the clockwise direction in FIG. 7, and the locking member 27 is twisted. The coil spring 30 can be rotated to the unlocking position against the urging force of the coil spring 30, and the locking part 27 a can be detached from the locking pin 26.

In this operation, a thumb is applied to the lower portion of the inclined surface 16a at the front end of the bottom plate 16, and an index finger and other fingers are applied to the rear surface of the operation rod 25 to grip the lower portion of the inclined surface 16a and the operation rod 25. Thus, the operation rod 25 can be rotated to the operating position with an easy operation.

Further, since the operating rod 25 and the recessed groove 16b are provided over almost the entire length in the left-right direction of the cabinet body 7, the latch lever 22 can be operated by the same operation at any position in the left-right direction. It can be easily released.

In this embodiment, a latch lever body 32 is formed by a pair of left and right turning levers 24, 24, an operating rod 25 as an operating portion, and a locking member 27 having a locking portion 27a. And the locking member 27 is linked to the latch lever body 32 so as to be rotatable relative to the latch lever body 32 by a predetermined angle around the rotation shaft 23. It may be integrated or fixed.

However, with the configuration as in this embodiment, when the door 8 is closed, the locking pin 26 comes into sliding contact with the inclined edge 27b of the locking member 27, and the locking member 27 biases the torsion coil spring 30. To prevent the rotation of the locking member 27 from being transmitted to the latch lever main body 32 side, the long hole 28 is merely loosely moved with respect to the pin 29 while being rotated to the locking release position. There are advantages that can be done.

At this time, in order to prevent the latch lever body 32 from being rotated by the locking member 27, a spring (not shown) having a small urging force that urges the latch lever body 32 toward the inoperative position, etc. May be provided.

After the latch lever 22 is released and the locking portion 27a of the locking member 27 is disengaged from the locking pin 26, the door 8 is assisted by the biasing force of the torsion coil spring 11 and opened to the fully open position with a light force. be able to. Alternatively, the door 8 can be opened to the fully open position only by the urging force of the torsion coil spring 11.

Immediately before the door 8 opens to the fully open position, the step 12b of the support arm 12 abuts against the damper pin 21 of the damper 20, and the damper pin 21 is pushed into the damper 20 to reduce the impact, and the door 8 Is opened to the fully open position, and when opened to the fully open position, the damper pin 21 is completely immersed in the damper 20, and the stepped portion 12b comes into contact with the case of the damper 20 and is stopped.

By rotating the door 8 downward from the fully open position to the closed position against the urging force of the torsion coil spring 11, the door 8 can be closed and immediately before reaching the closed position, the locking pin 26 However, the sliding member 27 is brought into sliding contact with the inclined edge 27b of the locking member 27 and once rotated to the unlocking position against the biasing force of the torsion coil spring 30, the locking member 27 The door 8 is held in the closed position until the latch lever 22 is next released by engaging with the locking portion 27a. The pivoting operation of the locking member 27 at this time is not transmitted to the latch lever body 32 side as described above.

The present invention is not limited to the above-described embodiment, and can be implemented in various modified forms.
For example, the left and right lengths of the operating rod 25 are short, and the latch lever 22 is disposed in the center of the lower portion of the cabinet body 7, and the operating rod 25 is not provided with the recessed groove 16 a on the bottom surface of the bottom plate 16. It may be arranged so as to project downward.

In the above embodiment, the tip of one extension portion 11b of the torsion coil spring 11 is fitted into the guide groove 17a of the fine adjustment fitting 17 fixed to the inner plate 9b, and the adjustment screw 19 is rotated. The distal end portion of the extension portion 11 b can be moved along the guide groove 17 a, and the distal end portion of the other extension portion 11 c of the torsion coil spring 11 is centered on the stepped screw 13 in the support arm 12. A plurality of locking holes 18 provided on the same circumference are selectively fitted, but a plurality of locking holes 18 are provided in the inner plate 9b, and one of the locking holes 18 is extended to this. The tip of the part 11b can be selectively fitted, and the support arm 12 is provided with a fine adjustment bracket 17 having an adjustment screw 19, and the tip of the other extension part 11c is provided in the guide groove 17a. To fit the part Good.

As described above, the urging force of the torsion coil spring 11 can be changed by selectively locking the

extension portion

11b or 11c of the torsion coil spring 11 to one of the side plate 9 and the support arm 12. A fine adjustment fitting 17 having an adjustment screw 19 is provided on the other of the side plate 9 and the support arm 12, and the other extension is provided in the guide groove 17a. When the tip of the

portion

11c or 11b is fitted, the urging force of the torsion coil spring can be greatly changed stepwise and can be changed steplessly and precisely.

A plurality of locking holes 18 are provided in only one or both of the side plate 9 and the support arm 12, and one or both of the

extended portions

11 b and 11 c of the torsion coil spring 11 are selectively provided. You may make it latch on.
With such a configuration, the urging force of the torsion coil spring can be changed in a stepwise manner. In particular, when a plurality of locking holes 18 are provided in both the side plate 9 and the support arm 12, the torsion coil is provided. The changeable range of the urging force of the spring can be remarkably increased.

Further, a fine adjustment fitting 17 having an adjustment screw 19 is provided on only one or both of the side plate 9 and the support arm 12, and both extending

portions

11b and 11c of the torsion coil spring 11 are provided in the guide groove 17a. Either one or both ends may be fitted.
With such a configuration, the urging force of the torsion coil spring can be precisely changed steplessly.

Claims

In the cabinet with a flap door that opens the door that opens and closes the front opening in the box-shaped cabinet body with the front opening from the closed position facing the vertical direction by lifting the lower end forward and upward,
At the front lower part of the cabinet body, a latch lever having an operation part at the lower end is pivotally attached with a turning shaft directed in the left-right direction so that the operation part can turn in the front-rear direction below the bottom plate in the cabinet body, The latching portion of the latch lever can be engaged with and disengaged from the engaged portion of the door when the door is closed, and further, the cabinet main body is moved toward the direction in which the engaging portion is engaged with the engaged portion. A door latch device in a cabinet with a flap door, characterized in that first biasing means for biasing is provided.
2. The latch device for a door in a cabinet with a flap door according to claim 1, wherein the operation portion of the latch lever is provided over substantially the entire length in the left-right direction of the cabinet body.
A recessed groove that is recessed upward is provided in a front surface of the bottom surface of the bottom plate of the cabinet body, and an operation portion of the latch lever is disposed in the recessed groove so as to be rotatable in the front-rear direction. Or the latch apparatus of the door in the cabinet with a flap door of 2.
The latch lever is separated into a latch lever body having an operating portion and a locking member having a locking portion, and the locking member can be rotated relative to the latch lever main body by a predetermined angle around a rotation axis. When the door is closed, the engaging portion is rotated by the engaged portion in the disengagement direction within the angle of relative rotation so that the engaging portion of the engaging member is engaged. The door latch device in a cabinet with a flap door according to any one of claims 1 to 3, wherein the door latching device is engaged with a joint portion.
The door that opens and closes the front opening in the box-shaped cabinet body that opens at the front is pivoted upward from the closed position that closes the front opening of the cabinet body by the support arms pivotally attached to both side plates of the cabinet body. In a cabinet with a flap door that supports the door so that it can be opened and provided with a second urging means that urges the door toward the opening direction,
The winding portion in which the wire is spirally wound as the second urging means is loosely fitted to the pivot portion of the support arm, and one extending portion of the wire extending from the winding portion is a side plate. In addition, the other extension portion is locked to the support arm, whereby the torsion coil spring is urged in the door opening direction, and at least one of the side plate and the support arm is provided with a torsion coil spring. A cabinet with a flap door, wherein a plurality of locking holes are provided so that the urging force of a torsion coil spring can be changed by selectively locking an extension portion.
The door that opens and closes the front opening in the box-shaped cabinet body that opens at the front is pivoted upward from the closed position that closes the front opening of the cabinet body by the support arms pivotally attached to both side plates of the cabinet body. In a cabinet with a flap door that supports the door so that it can be opened and provided with a second urging means that urges the door toward the opening direction,
The winding portion in which the wire is spirally wound as the second urging means is loosely fitted to the pivot portion of the support arm, and one extending portion of the wire extending from the winding portion is a side plate. In addition, the other extension portion is locked to the support arm, whereby the torsion coil spring is urged in the door opening direction, and at least one of the side plate and the support arm is provided with a torsion coil spring. A fine adjustment fitting having a guide groove for guiding the end of the extension portion in a direction in which the urging force can be changed is provided, and the end of the extension portion of the torsion coil spring guided by the guide groove is provided on the fine adjustment fitting. A cabinet with a flap door, characterized in that an adjustment screw for moving the section along the guide groove is provided.
The door that opens and closes the front opening in the box-shaped cabinet body that opens at the front is pivoted upward from the closed position that closes the front opening of the cabinet body by the support arms pivotally attached to both side plates of the cabinet body. In a cabinet with a flap door that supports the door so that it can be opened and provided with a second urging means that urges the door toward the opening direction,
The winding portion in which the wire is spirally wound as the second urging means is loosely fitted to the pivot portion of the support arm, and one extending portion of the wire extending from the winding portion is a side plate. In addition, the other extension portion is locked to the support arm, whereby the torsion coil spring is urged in the direction of opening the door, and either the side plate or the support arm is provided with an extension of the torsion coil spring. A plurality of locking holes are provided so that the urging force of the torsion coil spring can be changed by selectively locking the protruding portion, and the other one of the side plate and the support arm is provided with a torsion coil A fine adjustment fitting having a guide groove for guiding the end portion of the extension portion of the spring in a direction in which the urging force can be changed is provided, and the extension portion of the torsion coil spring guided by the guide groove on the fine adjustment fitting Adjust the end of the Flap door with a cabinet which is characterized in that a screw.
The cabinet with a flap door according to claim 5 or 7, wherein a plurality of locking holes are provided side by side on the same circumference centering on the pivot axis of the support arm.
9. With a flap door according to claim 5, wherein a plurality of locking holes are provided in a plurality of rows along a plurality of circumferences having different radii around the pivot axis of the support arm. cabinet.
10. The recess according to any one of claims 5 to 9, wherein a recess is provided on the upper edge of the front portion of the support arm so that the front end of the top plate of the cabinet body is fitted when the door is opened. Cabinet with flap door.