JPH04261984A - Latch device with dual draw prevention function - Google Patents

Abstract

PURPOSE:To prevent a storage box provided with plural drawers provided in parallel from falling forward by providing a dual draw prevention function for the storage box so that two or more drawers cannot be drawn simultaneously. CONSTITUTION:A latch 7 which is displaced during drawing operation is provided for each drawer and a latch receiver 16 which engages with each latch 7 in form of a pair therewith is provided on the storage box body. The latch receiver 16 includes cams 23 which are rotatably interlocked with each other and also rotatable in response to the displacement of the latch so that the cams which make rotational motion, in response to the drawing out action of a particular drawer, regulates the displacement of the latch of another drawer to maintain its engagement with the latch receiver. Then, in response to the drawing in action of a particular drawer, the corresponding latch cause the cam to rotate and return to allow the other drawers to be drawn out.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a latch device for a storage such as a cabinet in which a plurality of drawers are arranged in a row.
This invention relates to a latch device with a double drawer prevention function that prevents two or more drawers from being pulled out at the same time.

0002

[Prior Art] Conventionally, in a storage such as a cabinet in which a plurality of drawers are arranged in a row, a latch provided on the drawer and a latch receiver provided on the main body side are made to be able to engage with each other, and a latch provided on the handle is provided. For example, a latch mechanism in which the latch is displaced in conjunction with a finger plate to release the engagement with the corresponding latch receiver is known as
This method is known as disclosed in Japanese Patent No. 0-23413.

[0003] In addition, in the above-mentioned storage, there is also a simultaneous locking device that can lock all the drawers so that they cannot be pulled out by one locking operation, for example.
This method is known as disclosed in Japanese Patent No. 0-6132.

[0004] By the way, in a storage cabinet with a conventional latch mechanism, when the lock is released and ready for use,
Since other drawers can be pulled out while a particular drawer is being pulled out and used, two or more drawers are often pulled out and used at the same time.

[0005] However, the drawers are often packed with documents, etc., and their weight is more than expected.If two or more drawers are pulled out at the same time, the weight will cause the storage to move forward. It is experiential that one feels like one is about to fall or has fallen. This can be extremely dangerous for users, especially in storage cabinets with multiple drawers located above and below. Therefore, the rear part of the storage unit is fixed to a wall or the like or connected to an adjacent storage unit to prevent it from tipping forward.

[0006]

[Problem to be Solved by the Invention] In view of the above-mentioned situation, the present invention aims to solve the problem of storing two or more drawers at the same time without taking measures to prevent them from falling forward in a storage such as a cabinet having a plurality of drawers. This problem is solved by making it impossible to pull out the drawer.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention is a latch device for a storage such as a cabinet in which a plurality of drawers are arranged in a row, and the present invention is a latch device for a storage such as a cabinet in which a plurality of drawers are arranged in a row. In addition to providing a latch that is displaced in conjunction with the finger plate, a latch receiver that engages in pairs with the latch is provided on the storage cabinet body, and each of the latch receivers is rotatable in conjunction with the latch. The cam is equipped with a cam that can be rotated as the drawer is displaced, and the cam that rotates as a specific drawer is pulled out regulates the displacement of the latches of other drawers to maintain engagement with the latch receiver. In addition, a latch device with a double drawer prevention function is constructed, in which the cam is rotated back by the latch as the specific drawer is retracted, thereby making it possible to draw out other drawers.

[0007]

[Operation] The latch device with double drawer prevention function of the present invention having the above-mentioned contents, while a specific drawer is being pulled out and used, each latch receiver is The provided cams are rotated in conjunction with each other to restrict the displacement of the latches of other drawers and maintain engagement with the latch receivers. Furthermore, when the specific drawer that has been pulled out is pushed in and stored, the latch of that drawer rotates and returns the cam provided in the corresponding latch receiver along with the retracting operation, and all other cams that operate in conjunction with it are rotated. This is the initial state and allows other drawers to be drawn out.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be further explained in detail based on embodiments shown in the accompanying drawings.

FIG. 1 shows a typical embodiment of the present invention, and FIG. 2 shows its main parts. In the figure, A shows a storage such as a cabinet, B shows a latch device, C shows a locking device, and 1 shows the main body of the storage. , 2 indicate the drawers, respectively.

The storage A has a normal structure in which a storage main body 1 has a plurality of drawers 2, . In this embodiment, the drawers 2 are provided in multiple stages vertically, but a plurality of drawers 2 may be arranged in rows in the horizontal direction. The drawer 2 has a front plate 3 on the front surface, and is provided with a handle 4 having a recess at an appropriate position, and is supported by the storage main body 1 by a suspension rail or the like. Further, an appropriate gap is provided between the side plate 5 of the storage main body 1 and a storage section (not shown) behind the front plate 3 of the drawer 2.

Next, the latch device B will be described below. A latch 7 that is rotatable about a vertical rotation shaft 6 is protruded from behind the side of the front plate 3 of the drawer 2, and the latch 7 is urged outward by a spring 8. In addition, the rotating shaft 6
A horizontal bending piece 9 is integrally formed on the handle 4, and the bending piece 9 is associated with a vertical bending piece 12 of the operation shaft 11 of the finger plate 10 which is arranged in the recess of the handle 4 and can be rotated back and forth. When the finger plate 10 is pulled during the drawer operation, the operating shaft 11 and the bending piece 1
2. The latch 7 can be rotated inward via the bending piece 9 and the rotating shaft 6. As shown in FIGS. 2 and 3, the tip of the latch 7 has an engagement hole 1 opened laterally.
3, the distal end is formed into a substantially semicircular shape in plan view, and a concave portion is formed slightly inward on the proximal side to form an operating portion 14. Furthermore, a stopper 15 is formed inward from the operating portion 14 on the proximal side.
is installed protrudingly.

Furthermore, a latch receiver 16 is fixed to the side plate 5 of the storage main body 1 at an inner surface position corresponding to the latch 7, as shown in FIGS. 2 and 3. Latch receiver 1
6 has a substrate part 17 for fixing to the side plate 5,
The base plate portion 17 is integrally provided with an engaging pawl 18 protruding inward from the front end thereof to engage with the engaging hole 13 of the latch 7 and to restrict the drawer 2 from being pulled out. The engaging claw 18 has a substantially triangular shape in plan view, and has a slope 19 on the front side.

Further, a bearing 21 is formed at the rear of the base plate 17 of the latch receiver 16 and is capable of rotatably supporting a shaft 20 disposed vertically. Further, at the rear end of the base plate portion 17, a pair of upper and lower support portions 22 extending inward and having a substantially doglegged shape in plan view are provided.
22 are integrally formed at a predetermined interval, and the supporting portions 22, 2
A cam 23 is mounted between the ends of the cam 23 so as to be horizontally rotatable. A long hole 25 extending in the direction of the support shaft 24 is provided at the tip of the cam 23, and a vertical piece 27 bent at the tip of the actuating rod 26 extending inward from the shaft 20 is inserted into the long hole 25. The shaft 20 is loosely inserted into the cam 23 so that the shaft 20 can be rotated as the cam 23 rotates, and conversely, the cam 23 can be rotated as the shaft 20 rotates. Further, a concave portion 28 is formed on the outer peripheral edge of the tip of the cam 23, and the outer circumferential surface in the clockwise direction from the concave portion 28 is connected to the support shaft 24.
An arcuate surface 29 is formed with the center at the center. Furthermore, a notch 30 is formed which is largely cut in the direction of the support shaft 24 from the terminal end of the arcuate surface 29, and the operating part 14 of the latch 7 can be accommodated in the notch 30. The side surface of the notch 30 on the arcuate surface 29 side is a slightly depressed pressing surface 3.
1, and the other side opposite thereto is a locking piece 32 that can be elastically bent toward the notch 30 side. Further, on the outside of the lock piece 32, the cam 23 is provided separately from the lock piece 32.
A receiving portion 33 is provided which is fixed to and restricts the outward tilting of the lock piece 32. In this embodiment, the lock piece 32 is integrally formed with the cam 23 made of synthetic resin, and is given a spring effect by utilizing the elastic properties of the resin.
It is also possible to embed a separate metal spring in the cam 23, or to rotatably attach a separate member to the cam 23.
It is also possible to elastically bias the member in the direction of the receiving part 33. Further, the shape of the cam 23 in this embodiment is not limited to this, and other shapes and structures may be adopted as appropriate as long as they have the same effect.

Next, the locking device C will be described below. The upper end of the shaft 20 is bent at a substantially right angle and then bent vertically to form a crank portion 34.
A tension coil spring 36 or a spring equivalent thereto is installed between the tip of the vertical piece 35 provided at the tip of 4 and the side plate 5 of the storage main body 1, and the shaft 20 rotates to release the tension coil spring 3.
6 passes on the axis of the shaft 20, both rotation end points are maintained. Here, the crank part 34 is located within the top plate part 37 of the storage main body 1. On the other hand, a lock 38 is placed at a suitable location on the front of the top plate portion 37.
The lock 38 has a lock 39 that retracts laterally when locking and unlocking, and a locking member 40 is fixed to the tip of the lock 39. Then, the end face of the locking member 40 in the protruding direction comes into contact with the inside of one end 43 located in front of the rotary plate 42 whose central portion is horizontally rotatably supported by a support shaft 41, so that the locking member 40 is It moves outward to rotate the rotary plate 42 counterclockwise, and the other end 44 presses the vertical piece 35 of the crank portion 34 to give clockwise rotation to the shaft 20. It should be noted that the structure of the lock 38, the lock 39 and the locking member 40 that are displaced in accordance with the locking and unlocking operations, and the transmission mechanism that converts the displacement into the rotation of the shaft 20 are not limited to the embodiments described above. Instead, appropriate structures and mechanisms are adopted.

[0015] The operation of the latch device with double drawer prevention function of the present invention will now be described. First, when the lock by the locking device C is released and all the drawers 2 are stored in the storage main body 1, the state is shown in FIG. 3. That is, the engagement hole 13 of the latch 7 and the engagement claw 18 of the latch receiver 16 are engaged, and the cam 23 is located at the end point of the counterclockwise rotation. In this state, forward movement of the drawer 2 is restricted by the relationship between the engagement hole 13 and the engagement claw 18. Further, since the locking member 40 is located on the left side, the rotating plate 42 is free.

Next, when pulling out a particular drawer 2 from the state shown in FIG. The cam 23 comes into contact with the lock piece 32 provided on the cam 23.
A clockwise rotational force is applied to the shaft 20 , and a counterclockwise rotational force is applied to the shaft 20 through the vertical piece 27 and the actuation lever 26 against the elastic force of the tension coil spring 36 . The cam 23 and shaft 20 rotate, and eventually the tension coil spring 36
passes the shaft 20, the tension coil spring 3
6 is applied to the shaft 20, and the cam 23 automatically rotates to the clockwise end point, resulting in the state shown in FIG. In this case, when the other end 44 of the rotating plate 42 is in contact with the vertical piece 35 of the crank portion 34, the rotating plate 42 also rotates clockwise as the cam 23 rotates. 4, the engagement relationship between the engagement hole 13 of the latch 7 and the engagement claw 18 of the latch receiver 16 is released, and the stopper 15 comes into contact with the side wall 45 of the drawer 2. This prevents the lock piece 32 from being damaged due to excessive displacement of the latch 7. Then, drawer 2 can be pulled out towards you.

Here, the cam 23 of the latch receiver 16 corresponding to the latch 7 of the drawn out drawer 2 has rotated clockwise to the end point as described above, but the cams corresponding to the other drawers 2, . . . 23,... are also interlocked via the shaft 20, the operating rod 26 and the vertical piece 27, so as shown in FIG.
Similarly, rotate clockwise to the end point as shown in . In this case, since no displacement is applied to the latch 7 of the drawer 2 in the retracted state, its engagement hole 13 and the engagement claw 18 of the latch receiver 16 forming a pair therewith still maintain an engaged state. At this time, when the cam 23 rotates clockwise, the arcuate surface 29 of the cam 23 passes without contacting the operating portion 14 of the corresponding latch 7 or in slight contact with the latch 7 to the extent that it does not displace it, At the end of the clockwise rotation, the operating part 14 of the latch 7
is located near the concave portion 28. And in this state,
When you pull the finger plate 10 of the drawer 2 in the retracted state towards you, the latch 7 linked with it tries to move inward, but its operating part 14 comes into contact with the concave part 28 of the cam 23 and the end point of clockwise rotation is reached. The cam 23 located in the drawer 2 cannot be rotated further, and as a result, the displacement of the latch 7 is restricted and the drawer 2 is prevented from being pulled out. This is because the rotation radius of the latch 7 is larger than the rotation radius of the cam 23.

To store the drawn out drawer 2, the front plate 3 of the drawer 2 is pushed in, and as shown in FIG. While sliding inward on the slope 19, it enters the notch 30 of the cam 23 located at the end point of clockwise rotation, and the operating part 14 pushes the pressing surface 31 of the cam 23, causing the cam 23 to rotate counterclockwise. While applying force, the engagement hole 13 receives the tip of the engagement claw 18 due to the elastic urging force outward of the latch 7. Then, as the cam 23 rotates counterclockwise, the shaft 20 is moved through the vertical piece 27 and the actuator 26.
rotates clockwise against the elastic force of the tension coil spring 36, and when the tension coil spring 36 passes the shaft 20, the elastic force applies a clockwise rotational force to the shaft 20, automatically turning the cam 23. Return to the counterclockwise rotation end point. This initial counterclockwise rotational force is applied to the cam 23 by the backward displacement of the latch 7 by pushing the drawer 2 and the elastic force of the latch 7 outward. In this way, the storage state shown in FIG. 3 is restored.

Next, when locking all the drawers 2, etc., as shown in FIG. 6, after putting the drawer 2 into the retracted state, insert the key into the lock 38 and turn it, the lock 39 will protrude. , whereby the locking member 40 is locked at one end 43 of the rotating plate 42.
is pushed outward, and the other end 4 is pushed through the rotating plate 42.
4 pushes the vertical piece 35 of the crank portion 34, and maintains the state of the cam 23 at the end of counterclockwise rotation via the shaft 20, the actuating rod 26, and the vertical piece 27. In this state, even if you pull the finger plate 10 toward you to pull out any of the drawers 2, the operation part 14 of the latch 7 will not touch the lock piece 32.
abuts against further inward displacement of the latch 7,
As a result, the engagement state between the engagement hole 13 and the engagement claw 18 cannot be released.

[0020] Thus, the present invention always uses one drawer 2.
While the drawer 2 is being pulled out and used, other drawers 2 are prevented from being pulled out, and only one drawer 2 is always pulled out from the storage main body 1. By doing this, the weight of the drawer 2 that has been pulled out and the weight of the storage main body 1 including the other drawers 2, . . . are always balanced at the rear, and the storage A can be stabilized.

By the way, there is no problem if all the drawers 2, etc. are put into the retracted state and then the locking device C is operated as described above to lock all the drawers 2.
There may also be cases where the locking device C is operated and the locking device C is placed in the locked state without being completely retracted. In this case, conventionally, after operating the locking device C again to release the lock, the drawn out drawer 2 was completely retracted, and then the locking device C was operated again to lock it, but the present invention. According to the device:
Even if drawer 2 is pulled out and locked, Figure 7
By pushing in the drawer 2 as shown in FIG. 2, it is possible to lock even the drawer 2.

That is, when the drawer 2 is pushed in with the cam 23 at the end point of clockwise rotation, the operating portion 14 of the latch 7 slides on the slope 19 of the engaging pawl 18 of the corresponding latch receiver 16, and the cam 23 After contacting the inside of the lock piece 32, the lock piece 32 is bent outward against its elastic force toward the notch 30, and the engagement hole 13 of the latch 7 receives the engagement claw 18.
When drawer 2 is pushed in further, the pushing force and latch 7
The lock piece 32 is further bent by the outward elastic biasing force, and when the tip of the operating section 14 passes through the lock piece 32, the lock piece 32 returns to its original state in contact with the receiving part 33. , the latch 7 can realize an improved engagement state between the engagement hole 13 and the engagement claw 18 due to its elastic biasing force. This state is the same as the state in which the locking device C is operated and locked after all the drawers 2 have been completely retracted.

The embodiments described above are representative of the present invention, but the interlocking mechanism of the finger plate 10 and the latch 7, and the latch 7
and the engagement mechanism between the latch receiver 16 and the latch 7 and the cam 23
The rotation mechanism, the interlocking mechanism between the cam 23 and the shaft 20, and the interlocking mechanism between the shaft 20 and the locking device C are not limited to the above-mentioned embodiments. The displacement causes the cam 23 to rotate so that the drawer 2 can be pulled out, and even though all the other cams 23 similarly rotate in conjunction with the cam 23, the latches of the other drawers 2 are Any device may be used as long as it restricts the displacement of 7 so that it cannot be pulled out.

[0024]

Effects of the Invention According to the latching device with double drawer prevention function of the present invention as described above, it is a latching device for a storage such as a cabinet in which a plurality of drawers are arranged in a row, and each drawer has a drawer action. In addition to providing a latch that moves in conjunction with the finger plate used during storage, a latch receiver that engages as a pair with the latch is provided on the main body of the storage unit, and each of the latch receivers can rotate in conjunction with each other. In addition, it is equipped with a cam that can be rotated as the latch is displaced, and the cam that rotates as a specific drawer is pulled out restricts the displacement of the latches of other drawers and engages with the latch receiver. In addition, as the specific drawer is retracted, the cam returns to rotation due to the latch, making it possible to pull out other drawers, so while the specific drawer is being pulled out and used, Due to the displacement of the latch associated with the drawer operation, the cams provided on each latch receiver rotate in conjunction with each other to maintain engagement with the latch receivers by regulating the displacement of the latches of other drawers. While one drawer is being pulled out and in use, other drawers are restricted from being pulled out, and the storage cabinet can be prevented from tipping forward only by its weight balance.

Furthermore, when the specific drawer that has been pulled out is pushed in and stored, the latch of that drawer rotates and returns the cam provided in the corresponding latch receiver in accordance with the retracting operation, and all other items that are linked to the latch return to rotation. By setting the cam in the initial state, it is possible to draw out other drawers.

[Brief explanation of the drawing]

FIG. 1 is a simplified perspective view of a storage cabinet to which a latch device of the present invention is applied.

FIG. 2 is a perspective view showing the main parts of the same.

FIG. 3 is a cross-sectional plan view of main parts in a normal state with all drawers retracted.

FIG. 4 is a cross-sectional plan view of the main parts in a state where a particular drawer can be pulled out.

5 is a cross-sectional plan view of essential parts showing another state of the drawer in the state of FIG. 4; FIG.

FIG. 6 is a cross-sectional plan view of the main parts with all drawers locked.

FIG. 7 is a cross-sectional plan view of main parts showing a state in which one drawer is pulled out and locked with a locking device, and then the drawer is stored in that drawer.

[Explanation of symbols]

A Storage
B Latch device C Lock device 1 Storage main body
2 drawer 3 front plate
4 Handle 5 Side plate
6 Rotating shaft 7 Latch
8 Spring 9 Bent piece
10 Finger plate 11 Operation axis 12
Bent piece 13 engagement hole
14 Operation section 15 Stopper 16 Latch receiver 17 Board section
18 Engaging claw 19 Slope
20 Shaft 21 Bearing
22 Support part 23 Cam
24 Support shaft 25 Long hole
26 Operating rod 27 Vertical piece
28 Recessed portion 29
arc surface
30 Notch 31 Pressing surface
32 Lock piece 33
Receiving part
34 Crank part 35 Vertical piece
36 Tension coil spring 37 Top plate part
38 lock 39 lock
40 Locking member 41
spindle
42 Rotating plate 43 One end
44 Other end 45
side wall

Claims (1)

[Claims] [Claim 1] A latch device for a storage such as a cabinet in which a plurality of drawers are arranged in a row, wherein each drawer is provided with a latch that displaces in conjunction with a finger plate used during drawer operation, and the storage The main body is provided with a latch receiver that engages in pairs with the latch, and each of the latch receivers is provided with a cam that can rotate in conjunction with the latch and that can rotate with the displacement of the latch. The cam that rotates as the drawer is pulled out regulates the displacement of the latches of other drawers to maintain engagement with the latch receiver, and as the specific drawer is retracted, the cam rotates with the latches of the other drawers. A latch device with a double drawer prevention function, characterized in that the cam returns to rotation to enable other drawers to be drawn out.