JP3155932B2 - Locking device for drawers in cabinets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cabinet in which two or more drawers are provided in a cabinet body so as to be movable back and forth through suspension rails, wherein all drawers are locked in a closed state. The present invention relates to a lock device that can be locked in a double drawer preventing state in which when one drawer is pulled out, another drawer cannot be pulled out.

[0002]

2. Description of the Related Art Conventionally, all drawers are pushed into a cabinet main body so as to be in a so-called all-locked state, and when one of the drawn drawers is pulled out, drawers of other stages cannot be pulled out. Various devices have been invented which also serve as a so-called double drawer prevention mechanism.

As one prior art, for example, Japanese Utility Model Publication No. 4-53425 proposed by the present applicant has disclosed:
A vertical rod is provided on the inner surface of the side plate of the cabinet so as to be movable up and down, and the front end of the lock body is rotatably attached to the vertical rod at each drawer point of each stage, and the upper surface of each lock body is On the side surface of each drawer, a stopper body that abuts on the rear surface of the lock body of the vertical rod at the ascending position of the vertical rod is formed on the side surface of each drawer. An elastic spring body provided between the lock body and the vertical rod is configured to hold the posture of the lock body, and the lower surface of the stopper body contacts the inclined surface of the lock body when the drawer in the drawn state is pushed in. It is disclosed that the lock body is pressed to rotate rearward and downward against the elastic force of the elastic spring body, and the lock body returns to its original state after passing through the stopper body.

In this prior art, a fixed rail is arranged on the inner surface of the side plate of the cabinet body, and a drawer rail fixed to the side surface of the drawer of each stage via an intermediate rail movable back and forth with respect to the fixed rail is attached to the front and rear. A suspension rail for movably supporting is arranged, and a slider in a push-up body provided on the vertical rod is provided on a downwardly concave guide portion of an intermediate rail in the suspension rail when the drawer of each stage is in a pushed state. When the drawer is to be pulled out, the slider is brought into contact with the upper surface of the intermediate rail while the slider slides on the inclined surface from the guide portion, and the vertical rod is raised by a predetermined dimension via the push-up body, so that the other stages can be pulled out. The rear surface of the lock body is located in front of the stopper body in the drawer, preventing the drawer from moving out of the other stages. It was a configuration that.

[0005]

However, in the above configuration, the intermediate rail that moves forward in accordance with the front movement of the drawer,
Due to the resistance of the slider fitted in the recessed guide portion, there was a problem that the front movement could not be smoothly performed, and the front movement (drawing movement) of the drawer could not be carried out lightly.

Also, when the drawer is pushed in and moved, when the drawer-side stopper body passes through the contact inclined surface on the upper side of the lock body, the stopper body opposes the elastic force of the elastic spring body connected to the lock body. Since the lock body needs to be rotated, there is a considerable resistance, and there is also a problem that the push-in movement of the drawer cannot be performed easily. Further, in the prior art,
There is also a problem that the structure is complicated, such as forming the elastic spring body integrally with the lock body, and the manufacturing cost is increased.

[0007] The present invention solves these conventional problems,
It is an object of the present invention to provide a lock device for a drawer in a cabinet in which the drawer can be easily moved back and forth and the structure is simplified.

[0008]

Therefore, a lock device for a drawer in a cabinet according to the first aspect of the present invention,
In a cabinet that includes drawers inserted in a plurality of stages in the cabinet body so as to be movable back and forth through suspension rails, a vertical rod moves up and down on the inner surface of the side plate of the cabinet to face the outer surface of the side plate of each drawer. A lock body formed freely on the vertical rod and having a contact inclined surface having an upper surface which becomes higher as it goes deeper into the cabinet main body at each drawer location of each step; and a lower position of the lock body. in a first inclined guide surface descending toward the front of the lower surface Kiyabinetto body, and continuously to the lower end of the first inclined guide surface
A guide body having a horizontally stable surface extending forwardly, the suspend by longitudinal movement of the suspension rail
The upper part of the middle rail and the downward concave part
A drop-preventing piece that abuts against the inside and holds the vertical rod at two levels up and down; on the side of the drawer of each stage, the lock body of the vertical rod at the raised position of the vertical rod; A stopper body that abuts against and locks the rear surface, and abuts against the first inclined guide surface of the guide body when the drawer is moved out , and then abuts on the stable surface, so that the stopper and the vertical rod are moved together. And a push-up body that pushes the lock body up to a predetermined lock position where the rear surface prevents passage of the stopper body.

The invention described in claim 2 is the first invention.
In the lock device of the cabinet according to the above, in the lock of all locks, the vertical rod until the rear surface of the lock body of the drawer pushed into the cabinet body reaches a predetermined lock position that prevents the passage of the stopper body. It is configured to rise. Further, the invention according to claim 3 is the lock device for a cabinet according to claim 1 or 2, wherein the guide body is connected to the horizontal stable surface so that a lower surface of the cabinet is formed of a main body of the cabinet. A second inclined guide surface which rises as going forward is formed, and when the drop prevention piece is held at a position below the vertical rod, the push-up body raises the vertical rod through the second inclined guide surface by an appropriate height. It is configured to rise.

[0010]

According to the first aspect of the present invention, all the drawers are pushed.
When it is in the recessed state,
The fall prevention piece abuts on the guide and the vertical rod moves to the lowered position.
So you can pull out any one drawer and move it freely
On the other hand, when pulling out any one drawer, the push-up body provided on the side surface of the drawer pushes up the guide body via the first inclined guide surface formed on the guide body, whereby the vertical rod is moved to the raised position. Then, the rear surface of the lock body attached to the vertical rod is located at the front surface of the stopper body of the pushed drawer. This state is below the first inclined guide surface of the guide body.
The lifting body is in contact with a stable surface that extends forward from the end.
Move the drawer
Movement of the intermediate rail in the drawer
The fall prevention piece is located on the downwardly concave guide of the intermediate rail
Without contact, the intermediate rail can move forward smoothly.
It has the effect of being able to cut. When one drawer is at the drawn-out position, the vertical rod is held at the raised position via the suspension rail of the drawer and the drop prevention piece, so that the drawer in the pushed state can be prevented from being pulled out. Accordingly, when one drawer is pulled out, the drawer of the other drawer cannot be pulled out, so that the cabinet main body is prevented from falling forward.

According to the second aspect of the present invention, when all the drawers are in the pushed-in state and the all-lock is locked, the vertical rod is raised by a predetermined amount.
Since the lock body of each stage provided on the vertical rod is located on the front side of the stopper body of the drawer of each stage, all locks can be performed. Further, according to the configuration of the invention described in claim 3, when the fall prevention piece is held at a position below the vertical rod,
For example, when assembling the drawer to the cabinet body, the intermediate rail in the suspension rail is located on the cabinet body side, and the vertical rod is held at the lowered position via the fall prevention piece. In this case, when the drawer with the drawer rail is pushed into the cabinet body, if the push-up body on the side of the drawer interferes with the guide at the lowered position, the drawer cannot be pushed further. Therefore, as in the present invention, the push-up body is formed by forming, on the front side of the guide body, a second inclined guide surface which is connected to the horizontal stable surface and whose lower surface rises toward the front of the cabinet body. Pushes up the guide body via the second inclined guide surface and passes through, so that the push-up body can enter the inside of the cabinet body.

Further, in the lock device according to the present invention,
Unlike the prior art, the elastic spring body is unnecessary, and the lock body, the guide body, and the fall prevention body are fixed to the vertical rod, while the drawer only needs to be provided with the stopper body and the push-up body. Since the fixing member is used, the operation of mounting and the like is extremely simple, and the number of parts to be mounted is extremely small and the structure is simple.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a cabinet main body, and reference numeral 2 denotes a drawer disposed in the cabinet main body 1 in multiple stages. As shown, each drawer 2 is suspended movably back and forth via a pair of left and right suspension rails 3 and 3, respectively.

Each of the suspension rails 3 includes a U-shaped fixed rail 3a which is detachably attached to reinforcing frames of the left and right side plates 4 and 4 of the cabinet 1 and a plurality of rotating rollers in the fixed rail 3a. 5 and the left and right side plates 2 of the drawer 2
The drawer rail 3c has an L-shaped cross-section and protrudes from the drawer rails a and 2b. The drawer rail 3c is supported movably back and forth through a plurality of intermediate rollers 6 provided on the intermediate rail 3b (FIG. 2). reference).

As shown in FIGS. 3 and 4, the stopper body 7 projecting outward from both the left and right side plates 2a, 2a of each drawer 2 has a lower surface which is higher at the rearward position of the drawer in side view. Then, the metal plate 9 is formed to be bent so as to have a so-called downward-sloping lower inclined surface 7a so as to be lower at a position closer to the front. Further, the push-up body 8 shaped like a letter to the side view is formed integrally with the metal plate 9 at a position below the stopper body 7.

A vertical rod 11 having a U-shaped cross section, which can move up and down along the left and right side plates 4 and 4 of the cabinet body, is disposed along a guide frame 12 having a U-shaped cross section. 2 intersects perpendicularly with the back surface of the fixed rail 3a. As shown in FIGS. 5A, 5B, and 5C, the lock body 13, the first inclined guide surface 15, and the second
A guide body 14 having an inclined guide surface 16 and a fall prevention piece 1
Reference numeral 7 denotes an injection molded product of a synthetic resin such as a polyacetal resin, which is integrally formed on a base 18 having a U-shaped cross section. An engaging claw 19 protrudes from the inner surface of the base 18 having a U-shaped cross section, and the engaging claw 19 is engaged with a locking hole (not shown) formed at predetermined intervals of the vertical rod 11. , And is attached so as to surround the outer periphery of the vertical rod 11 with the base 18.

As shown in FIG. 5 (a), the upper surface of the lock body 13 has an abutment inclined surface 21 which becomes higher toward the rear of the cabinet body 1, and the guide body 14 is provided in the front direction of the cabinet body 1. , A first inclined guide surface 15 descending toward the bottom, a horizontal stable surface 22 connected to the lower end of the first inclined guide surface 15, and a continuous end provided at the front end of the stable surface, and in front of the cabinet body 1. It has a horizontally long shape with a second inclined guide surface 16 that gradually increases as it goes.

Further, as shown in FIG. 6, a plurality of vertically elongated slider strips 20 are provided on the outer peripheral surface of the base 18 so as to slide on the inner surface of the guide frame 12. With this configuration,
The metal guide frame 12 and the vertical rod 11 do not come into direct sliding contact with each other, and can move quietly and smoothly when the vertical rod 11 moves up and down. On the other hand, the suspension rail 3 of each stage has a cut-out portion 23 at the middle part of the upper surface of the fixed rail 3a in the front-rear direction of the upper surface of the fixed rail 3b while the middle part of the upper surface 24 of the middle rail 3b in the front-rear direction. Has a flat bottom surface 2 which is appropriately lowered by a depth dimension (h1).
5a and inclined surfaces 25b, 2 before and after communicating with the upper surface 24.
5c.

The drop preventing pieces 17 in each of the stages are disposed so as to face the upper surface of the intermediate rail 3b from the 23 cutouts of the fixed rail 3a. In the pushed state, the fall prevention piece 17 is fitted so as to be in contact with the flat bottom surface 25a (see FIGS. 7 and 9A). Further, when the intermediate rail 3b moves forward as each drawer 2 moves forward (pulls out), the push-up body 8 slides on the first inclined guide surface 15 of the guide 14 first, and the base 1
In order to raise (push up) the vertical rod 11 and the fall prevention piece 17 at first, the fall prevention piece 17 is moved to the flat bottom surface 2 at the fall portion 25 of the intermediate rail 3b.
It is configured to move from 5a to a position on the upper surface 24 of the intermediate rail 3b without contacting the rear inclined guide surface 25c (see FIG. 8A).

In this manner, the push-up body 8 is connected to the guide 1
When the vertical rod 8 is brought into contact with the horizontal stable surface 22 of FIG.
Can slide on the upper surface 24 of the intermediate rail 3b. Then, when the push-up body 8 moves forward beyond the horizontal stable surface 22 of the guide body 14, the push-up body 8 is guided through the guide body 14. When the vertical drive 11 is lifted, the fall prevention piece 17 is moved to the upper surface 2 of the intermediate rail 3b.
4, the raised position of the vertical rod 11 is maintained (see FIGS. 8 (b) and 9 (b)).

FIG. 4 shows an all lock mechanism 30. The all lock mechanism 30 includes a lock 31 attached to the front of the cabinet main body and an eccentric member 33 of the lock 31 when locking and unlocking with the key 32. A pair of left and right operation rods 34, 34 oscillating up and down in conjunction with each other is disposed on the lower surface of the top plate of the cabinet 1 so as to extend in the left and right direction. 34 are supported by a pin support shaft 35 so as to be rotatable in the middle thereof.
One ends of the operating rods 34, 34 are rotatably connected by pins, and a pair of upper and lower guide pieces 36, 36 project forward from the one operating rod 234. The eccentric member 33 at the rear of the lock 31 that is rotatably mounted on the front surface of the cabinet 1 is inserted into the main body 1.

The other ends of the pair of left and right operating rods 34, 34 suspend the vertical rods 11, 11 through their vertically long locking holes 37. With this configuration, when the lock 31 is rotated in the locking direction by the key 32 with the drawers 2 of all the stages being pushed in, the other ends of the left and right operation rods 34, 34 rise, and the vertical rod 1
The rear surface of the lock body 13 of each stage is positioned at the front surface of the stopper body 7 of the drawer 2 of each stage when the heights of the drawers 1 and 11 rise, so that all the drawers can be prevented from moving forward.

When the all-lock mechanism 30 is unlocked, as shown in FIG. 7, the vertical rods 11 move down, and the fall prevention pieces 17 of the vertical rod 11
And the stopper body 7 can pass through the upper surface of the lock body 13 in the front-rear direction. In this state, as shown in FIG. 8A, when any one of the drawers 2 is pulled out, the stopper body 7 at that stage passes forward through the upper surface of the lock body 13 while the push-up body 8 is moved to the guide body 14. Of the first inclined guide surface 1
5 is pushed up by the body 8. at the same time,
As the intermediate rail 3b moves forward, the fall prevention piece 17 at that stage rises slightly above the top surface 24 from the flat bottom surface 25a of the intermediate rail 3b, and the push-up body 8 moves the guide 1
When it comes into sliding contact with the stable surface 22 of No. 4, the vertical rod 8 is raised by the dimension (h1) (see FIG. 8B).

Therefore, the rear surfaces of the lock members 13 are respectively located on the front surfaces of the stoppers 7 on the side surfaces of the drawn-in drawer 2 in the other stages, so that the drawers in that stage can be prevented from moving forward. That is, it is possible to prevent the cabinet 1 from falling down in the forward direction by preventing the so-called double drawer. As described above, since the drop prevention body 17 of the drawer 2 that draws out does not interfere with the intermediate rail 3b at the drop portion 25, the movement of the intermediate rail 3b of the suspension rail 3 is reduced when the drawer 2 moves forward. This has the effect of being able to be held.

Further, by the pushing movement of one drawer 2 once pulled out, the stopper body 7 in the pushing drawer 2 is moved.
The lower inclined surface 7a passes over the contact inclined surface 21 of the raised lock body 13, and the push-up body 8 passes on the lower surface side of the guide body 14, and the push-up body 8 and the guide body 14
Intermediate rail 3b with no interference with
If the fall prevention piece 17 is located on the fall portion 25 in the above, the vertical rod 11 moves downward by a predetermined dimension and is held at the lower position, and returns to the original state (see FIG. 7). When the single drawer 2 is pushed in, the push-up body 8 is moved forward by the second inclined guide surface 1 on the guide body 14.
6 may be passed in the depth direction while sliding on 6.

Further, if the fall prevention member 17 of the vertical rod 11 is brought into contact (sliding contact) with the upper surface 24 of the intermediate rail 3b as a position for holding the vertical rod 11 in an elevated state, additional parts are required. Therefore, it is more effective to omit parts and installation work.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a cabinet.

FIG. 2 is a side view of a suspension rail.

FIG. 3 is a perspective view of a stopper body and a push-up body.

FIG. 4 is a perspective view of a main part of an all lock mechanism and a lock mechanism.

5A is a front view of a lock body, a guide body and a fall prevention piece, FIG. 5B is a side view, and FIG. 5C is cc in FIG. 5A.
FIG.

FIG. 6 is an enlarged sectional view taken along line VI-VI of FIG. 5 (a).

FIG. 7 is a side view of a vertical rod portion showing a pressed state of two drawers.

FIG. 8A is an operation explanatory view in a state where another drawer is pushed in and one drawer is started to be drawn out, and FIG. 8B is an operation explanatory view in a state where the draw out amount of one drawer is increased.

9A is an enlarged cross-sectional view of a main part corresponding to FIG. 8A, and FIG. 9B is an enlarged cross-sectional view of a main part corresponding to FIG. 8B.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cabinet main body 2 Drawer 3 Suspension rail 3a Fixed rail 3b Intermediate rail 3c Drawer rail 7 Stopper body 8 Push-up body 11 Vertical rod 13 Lock body 14 Guide body 15 First inclined guide surface 16 Second inclined guide surface 17 Fall prevention piece 18 Base 22 Stable surface 25 Depressed part 30 All lock mechanism

Claims (3)

(57) [Claims] 1. A cabinet in which drawers inserted in a plurality of stages in a cabinet main body are provided so as to be movable back and forth via suspension rails, wherein an inner surface of a side plate of the cabinet is opposed to an outer surface of a side plate of each drawer. A vertical rod is disposed so as to be movable up and down, and the vertical rod has a lock body formed on a contacting inclined surface whose upper surface becomes higher as it goes deeper into the cabinet body for each drawer point of each of the stages. At a position below the lock body, a first inclined guide surface whose lower surface is lowered toward the front of the cabinet body, and a forward end connected to a lower end of the first inclined guide surface and extending forward.
A guide body having a horizontally stable surface that, the suspension rail by front and rear movement of the suspension rail
Contact the upper surface of the intermediate rail and the downward concave guide
A drop-preventing piece for contacting and holding the vertical rod at the upper and lower two-stage positions is provided. A stopper body that locks upon contact with the first inclined guide surface of the guide body when the drawer is drawn out, and then contacts the stable surface.
And a push-up body that pushes the lock body together with the vertical rod to a predetermined lock position where a rear surface of the lock body prevents passage of the stopper body. 2. The lock according to claim 1, wherein said vertical rod is raised until a rear surface of said lock body of said drawer pushed into said cabinet body reaches a predetermined lock position for preventing passage of a stopper body. The lock device for a cabinet according to claim 1, wherein the lock device is configured. 3. The guide body has a second inclined guide surface which is connected to the horizontal stable surface and has a lower surface which rises toward the front of the cabinet body. 3. The cabinet according to claim 1, wherein the push-up body raises the vertical rod by a suitable height via the second inclined guide surface when the position is held at the lower position. Locking device.