JPH09215540A - Device for preventing double drawing of drawer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items with simple structure and to enable efficient assembly work. SOLUTION: In a cabinet having upper and lower multistage drawers provided in a cabinet body 1 in such a manner as to freely move in back and forth, composed are a plurality of locking rods 2 vertically, movably interposed on the inside surface of the cabinet body 1 to face each stage drawer side plate, and cam members 3, the same number of drawers, interlocked with back and forth movement of the drawers. The cam members are interlocked with the back and forth movement of the drawers to successively push up the locking rods located above the cam members and prevent the lower locking rod from upward movement. The cam members 3 are turnably installed on the inner surface of the cabinet body 1 so that the pushed-up locking rod may prevent the upper cam member from being interlocked with the drawers and so that the upward movement-inhibited locking rod may prevent the lower cam member from being interlocked with the drawing of the drawers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double drawer preventing device for a drawer, which prevents a plurality of multistage drawers provided in a cabinet from being drawn out at a time.

[0002]

2. Description of the Related Art Conventionally, in a cabinet where two or more stages of drawers are provided so as to be movable back and forth, one drawer cannot be pulled out and the other drawer cannot be pulled out, so that the center of gravity of the drawer is higher than that of the front. As a prior art of a so-called double drawer prevention device for preventing the entire cabinet from falling forward by falling to the front, there is, for example, Japanese Patent Publication No. 5-13649.

This is to arrange the lock rods on the inner surface of the cabinet body in the same number as the number of drawers, to provide the top lock pieces above the uppermost lock rods, and to rotate the lock cams on the upper ends of the lock rods. On the other hand, the locker cam is rotated with the operation pin formed on the drawer together with the drawer of one drawer, and the cam part formed on the lock cam is positioned above to set the upper lock rod and lock piece to the predetermined position. By raising the size and blocking the rotation of other locking cams, the drawer of other drawers is prevented.

That is, the number of parts such as the top lock piece, the lock rod, the locking cam and the number of parts are increased, which is expensive, and there is a problem that the assembling work also takes time. Also, since the lock cam is mounted so as to rotate on the lock rod, the lock cam moves up and down together with the lock rod each time the drawer moves, so the lock cam and lock rod can be rotated so as not to be affected by this movement. Since the lock cam and the lock rod must be connected, the structure for mounting the lock cam is complicated, and the drawer operation pin must be engaged even when the lock cam is raised, which increases the size of the lock cam. Moreover, the strength must be taken into consideration, and there is a problem that the cost is inevitably high.

Further, if the lock cam is enlarged, and the height of the drawer is small, there is a problem that the drawer rail interferes with the space for installing the lock cam and the usable drawer size is limited. , The top lock piece,
It is also necessary to provide a member for preventing the lock rod and the locking cam from falling inward, which also causes a cost increase.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, to reduce the number of parts with a simple structure, to improve the efficiency of assembly work, and to make the drawer as a whole compact and inexpensive. It is an object of the present invention to provide a double drawer prevention device.

[0007]

In order to solve the above problems, the first feature of the present invention is that it is arranged on the inner surface of the cabinet body so as to be vertically movable so as to face the drawer side plates of each stage. It consists of a plurality of lock rods and cam members of the same number as the drawers that interlock with the forward and backward movement of the drawer.The cam members interlock with the forward and backward movements of the drawer to sequentially push up the lock rods above it, and the lock rods below it. By preventing the upper cam member from moving upward, the upper cam member is prevented from interlocking with the drawer pulling out by the pushed up lock rod, and the lower cam member is prevented from moving upward. The lock rod is rotatably attached to the inner surface of the cabinet body so that it is prevented from interlocking with the drawer of the drawer.

A second feature of the present invention is that the cam member pushes up the upper lock rod as the actuating projection formed on the outside of the drawer projects forward and backward. The lower lock rod has a lock portion that shifts to a position that prevents the lock rod from rising, and the lock portion is positioned rearward of the rotation center of the cam member in a state where the lock portion shifts upward.

The third feature of the present invention is that the lock rod is moved to the upper end, and when the cam member is rotated to move the lock portion to a position preventing the lower lock rod from rising, the lock rod is moved downward. In addition to the upper end abutting surface located at, the lower end has a lower end abutting surface that always abuts the lock part, and the lower end abutting surface and the upper end abutting surface of the upper and lower lock rods are in a state where the drawer is stored. It abuts.

A fourth feature of the present invention is that the lock rod is moved to the upper end portion when the cam member is rotated and the lock portion is moved to a position where the lower lock rod is prevented from rising. While having a stopper protrusion to contact, the rear end of the lower end has a protrusion escape recess of the stopper protrusion, the stopper protrusion is located in the protrusion escape recess in a state where the drawer is accommodated,
The lower end contact surface and the upper end contact surface of the upper and lower lock rods contact each other.

A fifth feature of the present invention is that the lock rod is moved to the lower end, when the cam member is rotated to the position where the lock portion prevents the lower lock rod from rising. While having a stopper protrusion to contact, at the upper end rear part has a protrusion escape recess of the stopper protrusion, the stopper protrusion is located in the protrusion escape recess with the drawer accommodated,
The upper and lower abutting surfaces of the upper and lower lock rods come into contact with each other.

A sixth feature of the present invention is that the lock rod is attached to an intermediate member whose length is appropriately selected according to the size of the drawer in the height direction, and to the upper and lower ends of the intermediate member. The upper and lower end members made of synthetic resin are used.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a cabinet in which upper and lower multi-stage drawers are provided in a cabinet body so as to be movable back and forth, and is arranged on the inner surface of the cabinet body so as to be vertically movable so as to face the drawer side plates. It consists of a plurality of lock rods installed and cam members of the same number as the drawers that interlock with the longitudinal movement of the drawer, and the cam members move upwards as the operating projection formed outside the drawer moves forward and backward. While pushing up the lock rod of, while having a lock portion that moves to a position that prevents the lower lock rod from rising, the lock portion moves upward,
The lock rod is located at the rear of the center of rotation of the cam member, and the lock rod is located at the upper end portion, and the upper end portion is located at the lower end when the cam member is pivoted and the lock portion is moved to a position that prevents the lower lock rod from rising. In addition to having a contact surface, the lower end portion has a lower end contact surface that is always in contact with the lock portion, and the lower end contact surfaces and the upper end contact surfaces of the upper and lower lock rods are in contact with each other when the drawer is housed. .

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to the accompanying drawings. 1 to 4, reference numeral 1 denotes a cabinet main body, reference numerals 20 ... Denote a plurality of stages of drawers supported in the cabinet main body 1 via slide rails so as to be movable back and forth, and reference numeral 30 denotes a cabinet main body. 2 shows a double withdrawal prevention device provided on the inner surface of 1.

The double drawer preventing device 30 is located at the same number of lock rods 2 ... As the number of drawers 20, and at the abutting portion of each lock rod 2 ..., and is rotatable on the inner surface of the cabinet body 1. The same number of cam members 3 as the attached drawers 20 ...
It is composed of operating projections 40 ... Provided on the drawer side plate 200 that rotates the cam member 3 in accordance with the forward / backward movement of the drawer 20.

The cabinet main body 1 includes a front reinforcing member 12 fixed to the inner surface of the front end portion of the side plate 11 and formed with a lock rod supporting recess 13 in which a substantially central portion in the front-rear direction is recessed toward the side plate 11 over the entire width in the height direction. , A retaining projection that is sequentially arranged in the vertical direction in the lock rod supporting recess 13 and is located above the uppermost lock rod 2 of the lock rods 2 ... Has 50.

The lock rod 2 is formed of a synthetic resin material having a front-rear width slightly smaller than the front-rear width of the lock-rod support recess 13 so as not to rattle in the front-rear direction, and having a thickness substantially corresponding to the depth of the lock-bar support recess 13. Upper and lower end members 4 and 5,
The upper and lower end members 4 and 5 are composed of a steel intermediate member 21 attached to the upper and lower end portions.

The upper end member 4 has a substantially U-shaped cross section, an intermediate member fitting recess 41 is formed on the side plate 11 side, and an upper fitting protrusion projecting toward the side plate 11 is formed at the lower end of the inner surface of the intermediate member fitting recess 41. A portion 42 is provided, and a cam operating notch 43 for restricting the rotation of the cam member 3 is formed on the front surface of the upper end. The upper end of the cam operating notch 43 is continuous with the upper lock rod 2.
An upper end contact surface 44 with which the front lower end surface of the lower end member 5 contacts is formed.

The lower end member 5 has a substantially U-shaped cross section, and an intermediate member fitting recess (not shown) similar to the intermediate member fitting recess 41 of the upper end member 4 is formed on the side plate 11 side. A lower fitting protrusion 52 that projects toward the side plate 11 is provided on the inner surface of the central portion of the fitting recess in the up-down direction, and the lower end surface is moved up and down by the rotation of the cam member 3, and when the lower member moves down, the upper end member is formed. A lower contact surface 54 that contacts the upper end contact surface 44 of the No. 4 is formed.

In the second embodiment of the lock rod 2 shown in FIG. 4,
A stopper recess 55 for maintaining the stationary state of the cam member 3 is formed continuously behind the lower end contact surface 54, and a stopper protrusion 56 continuously protruding downward is formed behind the stopper recess 55. A protrusion escape recess 45 of the stopper protrusion 56 of the upper lock rod 2 is formed continuously behind the upper end contact surface 44, and when the lock rod 2 is moved downward, the stopper protrusion 56 of the lower end member 5 is formed. Is located in the protrusion relief recess 46 of the upper end member 4.

Further, in the third embodiment of the lock rod 2 shown in FIG. 5, a stopper projection 46 projecting upward is formed continuously behind the upper end contact surface 44 and behind the lower end contact surface 54. In succession to the above, a protrusion escape recess 56 of the stopper protrusion 46 of the lower lock rod 2 is formed, and when the lock rod 2 moves downward,
The stopper protrusion 46 of the upper end member 4 is located in the protrusion escape recess 56 of the lower end member 5.

The intermediate member 21 has a U-shaped cross section formed of a steel material having a width and a thickness that fit in the intermediate member fitting recesses 41 formed in the upper and lower end members 4 and 5, and its upper and lower end portions are formed. Upper and lower fitting protrusions 4 formed on the upper and lower end members 4 and 5
A fitting hole (not shown) in which the 2, 52 are fitted is formed,
The lock rod 2 is formed by attaching the upper and lower end members 4 and 5 to the upper and lower end portions of the intermediate member 21. That is, the lock rod 2 needs to have various lengths corresponding to the type of the drawer 20 (difference in height of the drawer). In this case, the upper and lower end members 4 and 5 are common and the lock member 2 of the intermediate member 21. It is possible to obtain lock rods 2 of various lengths by selecting the length, and it is possible to reduce the cost of resin molds and the like that occur when the lock rods 2 are integrally formed of a synthetic resin material or the like, thus reducing costs. It can be measured. Further, in the embodiment, the intermediate member 21 is made of steel material, but if it is formed by extrusion molding of synthetic resin, it can be manufactured at a lower cost than integrally forming.

The cam member 3 is made of a synthetic resin material and straddles the lock rod supporting recess 13 on the inner surface of the cabinet body 11.
The holding plate 6 screwed to the front reinforcing member 12, and the holding plate 6
The rotary plate 7 is rotatably held by the rotary plate 7.
The rotating plate 7 includes a substrate 71 formed in a disc shape and a substrate 71.
When the position of the lock rod 2 is projected upward to the upper side by the rotation of the rotating plate 7, the lower end contact surface 54 of the upper lock rod 2 is pushed to push up the lock rod 2 and Of the lock rod 2 of the upper end member 4 of the lock rod 2 of the lock rod 2 and the forward and backward movement of the operating projection 40 formed to project to the outside of the body plate 200 of the drawer 20 (the drawer 2
It is composed of an operating portion 8 for rotating the rotating plate 7 in accordance with the forward / backward movement of.

An annular recess 74 is formed on the peripheral end surface of the base plate 71, and the lock portion 72 is formed integrally with the base plate 71. In the case of the second embodiment of the lock rod 2 shown in FIG.
Is housed in the cabinet body 11, and the lower end contact surfaces 54 of the lower end members 5 of the upper lock rods 2 and 2 and the lower surfaces of the stopper protrusions 56 protrude from the upper end contact surfaces 44 of the upper end members 4 of the lower lock rods 2. In the state of being in contact with the upper surface of the part escape recess 46,
The lower end member 4 is in contact with the lower surface of the lower end contact surface 54 of the upper lower end member 5 at the upper portion of the cam operating notch 43 of the upper end member 4.

The lock plate 72 is moved upward by the rotation of the rotary plate 7 when the drawer 2 is pulled out.
・ While pushing up in sequence, rotate upward to move
The stopper recess 55 is located slightly rearward of the center of rotation of the lock lever, contacts the front surface of the stopper protrusion 56, and is prevented from rotating rearward and forward by the weight of the upper lock rod 2. At this time, the lock portion 72 is close to above the upper end contact surface 44 of the upper end member 4 of the lower lock rod 2, and the uppermost lock portion 72 has no lock rod 2 above it. It is only close to the upper side of the upper end contact surface 44 of the member 4, and the lower end lock rod 2 of the lowermost member 5 abuts on the bottom plate 14 of the cabinet body 1, so that the load of the upper lock rod 2 ... I just support it.

The operating portion 8 is formed in parallel with a front operating portion 81 protruding toward the drawer 20 side of the base plate 71 and a rear portion of the front operating portion 81. The front operating portion 81 and the rear operating portion 82 are formed in a character shape, and the distance between the front operating portion 81 and the rear operating portion 82 is slightly larger than that of the operating protrusion 40 formed on the drawer. Then, the drawer 20 is stored and tilted rearward (at this time, the lock portion 72 abuts on the lower end abutment surface 54 of the upper lock rod 2 and the cam operating notch 43 of the lower lock rod 2). It is located at the top.), Drawer 2
When the operating protrusion 40 moves forward with the forward movement of 0, the operating protrusion 40 located between the front operating portion 81 and the rear operating portion 82 collides with the front operating portion 81 and the rotating plate. Move forward while rotating 7.

Then, after rotating the rotating plate 7 by a predetermined angle, it is pulled out forward together with the drawer 20. At this time, the lock portion 72 is connected to the lower end contact surface 5 of the lower end member 5 of the upper lock rod 2.
While pushing against the lower surface of 4, the upper lock rods 2 ... are sequentially pushed up to rotate and move upward, so that they are located in the stopper recess 55 slightly rearward of the center of rotation of the rotating plate 7 and at the same time the stopper is moved. While being in contact with the front surface of the protrusion 56 and being close to above the upper contact portion 44 of the lower lock rod 2, the load of the upper lock rod 2 ... Is supported and the lower lock rod 2 ... Are prevented from moving upwards.

That is, in the state where one of the drawers 20 is pulled out, the lock rod 2 above the pulled-out drawer 20 is raised, and the lock portion 72 prevents the lower lock rod 2 from being raised. Even if the operating protrusion 40 is brought into contact with the front operating portion 81 of the rotating plate 7 in an attempt to pull out the drawer 20 below the pulled drawer 20, the lock portion 72 may push up the lock rod 2 above. Therefore, the rotating plate 7 cannot be rotated, and the drawer cannot be pulled out.

Further, the drawer 2 above the drawn drawer 20.
Even if the operating projection 40 is brought into contact with the front operating portion 81 of the rotating plate 7 in an attempt to pull out 0, the cam operating notch 43 formed at the upper end of the raised lock rod 2 moves upward. Since it is close to the upper rear part of the lock part 72, the lock part 72 is prevented from moving backward while rotating, the rotating plate 7 cannot be rotated, and the drawer 20 cannot be pulled out. .

On the other hand, two or more drawers 2 are simultaneously operated due to an earthquake or the like.
Even if the rotary plate 7 is simultaneously rotated in an attempt to pull out 0, the lower lock rod 2 is also rising by the same amount as the upward displacement of the lock portion 72 while rotating, so that the upper rotary lever 7 is rotated. The lock portion 72 of the moving plate 7 is pressed against the upper front surface of the ascending cam operating cutout portion 43, and the lock portion 72 of the lower rotating plate 7 has the upper lock portion 72 of the cam operating cutout portion 43. Since it is pressed against the front surface of the upper part, the lock rod 2 cannot be pushed up and only one of them can be pulled out.

The holding plate 6 is composed of a front holding plate 61 and a rear holding plate 62. The front holding plate 61 and the rear holding plate 62 are formed in the same shape, and the front holding plate 61 supports the lock rod of the front reinforcing member 12. The front connecting board 63 connected to the front side of the recess 13 and the annular recess 74 formed in the rear surface of the front connecting board 63 in the semi-circular shape at the central portion in the thickness direction of the rear plate are formed in the board 71 of the rotating plate 7. The front support projection 64 is fitted from the front, and the rear holding plate 62 is provided with the lock rod support recess 13 of the front reinforcing member 12.
A rear connecting board 65 connected to the rear side of the
The rear support ridge 62 is formed by projecting forward in a semicircular shape at the central portion of the front end face in the thickness direction, and is fitted into the annular recess 74 formed in the base plate 71 of the rotating plate 7 from the rear side.

[0025]

As described above, according to the present invention, since the cam member is rotatably attached to the cabinet body so that the cam member is located between the lock rods, the mounting position of the cam member is always constant regardless of whether the drawer is in or out. By maintaining the height of the lock rod, it is possible to prevent the lowering of the lock rod from rising. Therefore, unlike the conventional case, the top lock piece is not required, and the number of parts can be reduced. Further, since the height position of the cam member is always constant regardless of the forward / backward movement of the drawer, the projection for operating the drawer always operates at the same position, so that the cam member can be made compact and the structure is simplified. You can do it. Moreover, since the cam member can be made compact, the space for mounting the cam member can be small,
It can also be used in small drawers. Further, since the cam members are located above and below the lock rods and attached to the cabinet body, there is no need to provide a member for preventing the lock rods from falling inward, so that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of the present invention.

FIG. 2 is a schematic view showing an operating state of a lock rod and a cam member.

FIG. 3 is a sectional view showing a mounting state of a lock rod and a cam member.

FIG. 4 is a front view showing a second embodiment of the lock rod.

FIG. 5 is a front view showing a third embodiment of the lock rod.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cabinet body 2 Lock rod 21 Intermediate member 20 Drawer 200 Drawer side plate 3 Cam member 4 Upper end member 44 Upper end contact surface 45 Projection escape recess 46 Stopper projection 40 Operating projection 5 Lower end member 54 Lower end contact surface 45 Projection Relief part recess 56 Stopper protrusion 6 Holding plate 7 Rotating plate 72 Lock part 8 Actuating part

Claims (6)

[Claims] 1. A cabinet in which upper and lower multi-tiered drawers are provided in a cabinet body so as to be movable back and forth, respectively, and a plurality of locks are movably arranged on the inner surface of the cabinet body so as to face the drawer side plates of the respective stages. It consists of a rod and the same number of cam members that interlock with the longitudinal movement of the drawer.The cam member interlocks with the longitudinal movement of the drawer and sequentially pushes up the lock rod above it, while the lower lock rod moves upward. By preventing this, the upper cam member is prevented from interlocking with the drawer of the drawer by the pushed up lock rod, and the lower cam member is prevented from moving upward. Double drawer withdrawal prevention device characterized in that it is rotatably attached to the inner surface of the cabinet body so that it is prevented from interlocking with the drawer of the drawer. 2. The cam member pushes up the upper lock rod in accordance with the back-and-forth movement of an operating projection formed to project to the outside of the drawer, and is positioned to prevent the lower lock rod from rising. The double drawer withdrawal preventing device according to claim 1, further comprising a locking portion that is displaced, and the locking portion is located rearward of a rotation center of the cam member in a state where the locking portion is displaced upward. 3. The lock rod has an upper end contact surface at the upper end portion, which is located below when the cam member is rotated and the lock portion is moved to a position to prevent the lower lock rod from rising, and the lower end portion is provided. The lower end abutting surface which always abuts on the lock part, and the lower end abutting surface and the upper end abutting surface of the upper and lower lock rods abut each other in a state where the drawer is accommodated. Double drawer withdrawal prevention device. 4. The lock rod has, at an upper end portion thereof, a stopper protrusion that comes into contact with the cam member when the cam member is rotated and the lock portion is moved to a position that prevents the lower lock rod from rising.
The rear end of the lower end has a protrusion escape recess for the stopper protrusion, and the stopper protrusion is located in the protrusion escape recess when the drawer is stored. The double drawer preventing device for a drawer according to claim 3, wherein the contact surfaces are in contact with each other. 5. The lock rod has a stopper projection at its lower end, which comes into contact when the cam member is rotated to move the lock portion to a position that prevents the lower lock rod from rising, and
The rear end of the upper end has a recess for releasing the protrusion of the stopper protrusion, and the stopper protrusion is located in the recess for recessing the protrusion when the drawer is housed, and the upper and lower abutment surfaces of the lock rod are in contact with the upper end. The double drawer withdrawal prevention device according to claim 3, wherein the surfaces are in contact with each other. 6. The lock rod comprises an intermediate member whose length is appropriately selected according to the size of the drawer in the height direction, and upper and lower end members made of synthetic resin attached to the upper and lower end portions of the intermediate member. The drawer double-drawing prevention device according to claim 3, 4 or 5, wherein: