JPH09317293A - Electric locking/unlocking device which is also used for preventing simultaneous pull-out in multiple drawer cabinet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an effective use of a space in a box body by moving an elevating/ lowing rod capable of simultaneously locking/unlocking all drawers in the vertical direction by an electromagnetic solenoid arranged on side surfaces of the box body. SOLUTION: An automatic locking device 21 having an electromagnetic solenoid 29 is fitted to an upper rear side of an inner side on one side of a cabinet box body 1. When an electromagnetic cylinder lock 35 is locked, a shaft 29a of the solenoid 29 is retracted, and a turning link 26 is turned counterclockwise. An elevating/locking rod 6 is slightly elevated through an oscillation plate 17, and a depressing projection provided on the elevating/lowering rod 6 covers the forward side of a projection provided on a side of a drawer 2, and all drawers 2 can be locked in a non-drawing manner. When energization to the solenoid 29 is stopped, the shaft 29a is extended, and the elevating/lowering rod 6 is lowered by its self-weight, and the drawers 2 are unlocked in a drawing manner. A space toward the end direction of the drawers can be effectively made use of, and an electric locking/unlocking device can be easily installed only by adding the electromagnetic solenoid to the cabinet having a conventional toppling-preventive device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simultaneous withdrawal prevention and electric locking / unlocking device in a multi-stage drawer cabinet in which a plurality of drawers are vertically mounted in a multi-tiered manner.

[0002]

2. Description of the Related Art Conventionally, as this type of lock device, Japanese Utility Model Publication No. 4-32465 has been disclosed. This device is configured such that a plurality of drawers are mounted in a box in a multi-stage manner in a box body, and a latch claw rotatably provided at the rear end of each drawer is arranged so as to be rotatable back and forth disposed in the box body. It is configured to be urged in the direction of engagement with the vertically-engaged vertically-engaged engagement member so that the engagement with the engagement member can be released by a lock provided on the front plate of the drawer to which each of the latch claws is attached. On the other hand, an electromagnetic solenoid for rotating and driving the engaging member in a direction for simultaneously engaging and disengaging all the drawers inserted into the box with the latch claws is provided in the box.

In this device, an electromagnetic solenoid is used to
Since all the drawers can be locked and unlocked electrically at the same time, locking and unlocking can be performed more easily than locking and unlocking by locks. When locking and unlocking a large number of cabinets, key operation is required for each cabinet in the case of lock, whereas in the case of a cabinet equipped with this device, the central control unit has By controlling the electromagnetic solenoid of the cabinet, it is possible to lock and unlock each cabinet at the same time, locking and unlocking work can be done very easily, and it is possible to lock all cabinets at the time of leaving the company and unlock all cabinets at the time of leaving the office. This is possible and effective in preventing theft of documents.

[0004]

However, in such a device, since the latch claw is provided at the rear end of the drawer, and the engaging member which is rotationally driven by the electromagnetic solenoid is provided at the inner rear part of the box body. In the state that the drawer is inserted in the box, a distance is required between the rear surface of the drawer and the inner rear surface of the box, and the effective depth of the drawer is smaller than the depth of the box. There was a drawback that the amount of storage was reduced.

Further, when the engaging member is in the unlocked state, there is a possibility that all of the multistage drawers are pulled out at the same time and the cabinet falls over. Therefore, it is conceivable to install an anti-tilt device to prevent the cabinet from toppling over due to the simultaneous opening of multiple drawers provided on the inside of the box of the multi-stage drawer cabinet. When it is provided as a device, there is a problem that the space therefor further increases and the device becomes expensive.

In order to solve such a problem, the present invention does not require a distance between the rear surface of the drawer and the inner rear surface of the box, can be installed in the box, and can simultaneously open a plurality of drawers. It is an object of the present invention to provide a simultaneous withdrawal prevention and electric locking / unlocking device in a multi-stage drawer cabinet in which a tilting prevention device and a locking / unlocking device for preventing the cabinet from falling down can be shared by a simple mechanism.

[0007]

In order to achieve the above object, a simultaneous withdrawal prevention / electric locking / unlocking device in a multistage drawer cabinet according to the present invention is a multistage drawer in which a plurality of drawers are vertically mounted in a multistage manner. In the cabinet, a lifting rod is attached to the inside surface of the box so that it can move up and down,
A protrusion is provided on the side surface of each drawer facing it, and a guide tool capable of restricting the movement of the protrusion is provided on the inner side surface of the box body. The movement of the protrusion is regulated by a guide, and an electromagnetic solenoid that gives a driving force to regulate the vertical movement of the lifting rod by a signal from a locking / unlocking switch is provided on the inner surface of the box body. The electromagnetic solenoid is used to stop the lifting rod at a predetermined position so that all drawers can be locked and unlocked at the same time. According to this feature, the elevating rod that can be locked and unlocked at the same time by moving it up and down can be moved by using the electromagnetic solenoid that is installed on the inner surface of the box. Can effectively take the depth of. In addition, an electric solenoid actuating / releasing device can be easily installed in a cabinet having a collapse prevention device only by adding an electromagnetic solenoid to the collapse prevention device for preventing the cabinet from falling due to simultaneous opening of a plurality of drawers. .

The simultaneous withdrawal prevention and electric locking / unlocking device in the multi-stage drawer cabinet of the present invention is mounted on the inner side surface of the box so as to be vertically movable in the multi-stage drawer cabinet in which a plurality of drawers are vertically mounted in the box body. A protrusion is provided on one of the raised and lowered rod and the side surface of each drawer facing it, and on the other side, when the elevator rod moves upward, it becomes flush with the protrusion and abuts on it. The stopper surface that prevents the drawers from moving forward, the pusher that moves the drawers upward by sliding the slides to the protrusions by moving the drawers forward, and moving the drawers rearward. At the same time, a guide tool provided with a push-down portion for slidingly contacting the protrusion and lowering the elevating rod is provided, and the elevating rod is provided on the inner side surface of the box body on which the elevating rod is mounted by a signal from the locking / unlocking switch. And link An electromagnetic solenoid that can move the lifting rod up and down together is provided, and the electromagnetic solenoid moves the lifting rod upward to lock all the drawers at the same time. The feature is that they are unlocked at the same time.

In the simultaneous withdrawal prevention / electrical locking / unlocking device in the multistage drawer cabinet according to the present invention, it is preferable that a spring for urging the elevating rod in the upward direction is provided on the inner surface of the box. By doing so, it is possible to pull the lifting rod upward by using a small electromagnetic solenoid that consumes less electricity.

The simultaneous withdrawal prevention / electrical locking / unlocking device in the multi-stage drawer cabinet of the present invention mounts a plurality of drawers vertically on the multi-stage lock, and at the same time, provides a predetermined allowable space in the vertical direction of the inside of the box. A plurality of elevating rods are mounted so that a protrusion is provided on the side surface of each drawer that faces the elevating rod, and a contact piece that abuts on the protrusion by the movement of the drawer at the upper end or the lower end of each elevating rod. A locking cam having a locking member that can be engaged with and disengaged from the moving space is rotatably pivotally mounted, and the locking member is engaged in the allowable space when the drawer moves forward, and the entire lifting rod is attached. The movement of the elevator is regulated, and when the drawer moves backward, it deviates from the permissible space and allows the movement of all the lifting rods. The upward movement of the lifting rod The fitting member to be restrained is provided with an electromagnetic solenoid that can be retracted above the uppermost lifting rod, and the upward movement of the uppermost lifting rod is restricted by the electromagnetic solenoid with this fitting member so that all withdrawals can be performed simultaneously. It is characterized in that all drawers are unlocked at the same time by locking and allowing movement above the uppermost lifting rod.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 shows a document storage cabinet to which the present invention is applied. The drawers 2 are housed in upper and lower three stages.
Traveling rails 4 that can be fitted into guide rails 3 that are slidably mounted in the front-rear direction are fixedly provided on respective inner side surfaces of the box 1 on both side surfaces of the drawer 2. It can be put in and out of the box 1.
Projectors 5 are provided at predetermined locations on both side surfaces of each of the drawers 2.

Up and down rods 6, which are slightly shorter than the height of the box body 1, are vertically movably supported by support plates 10 (see FIG. 2) in the vertical direction on both inner sides of the box body 1. Between the lower end of the lifting rod 6 on the right side of the middle and the lower end of the side plate on the right side,
A catch 7 made of synthetic resin is provided.

As shown in FIGS. 5 (a) to 5 (c), the catch 7 comprises an upper gripping tool 8 and a lower fitting tool 9, and the gripping tool 8 has a rectangular box shape with an open lower surface. In addition, a pair of locking pieces 8a that are elastically bent are formed on the inner surface. The lower ends of the locking pieces 8a are always close to each other. The fitting 9 has a tongue-shaped fitting portion 9a with a bulged middle portion and a mounting portion 9b connected to the lower end of the fitting portion 9a. The gripper 8 is fixed to the lower portion of the inner side surface of the box 1, and the fitting 9 is fixed to the lower end of the right elevating rod 6.

A board 12 of a guide 11 to be described later is fixed to a portion of the right elevating rod 6 which is substantially at the same height as each of the projections 5. Downward chevron-shaped push-up protrusions 13 are continuously provided on the upper side surfaces of the substrate 12, and upward-veined chevron-shaped push-up projections (stoppers) 14 are continuously provided on the lower side surfaces.
Between the four, an inclined groove 15 facing forward and downward is formed, through which the protrusion 5 of the drawer 2 can be inserted back and forth. The rear end surface 14a of the pressing projection 14 forms a vertical stopper surface. still,
At the position corresponding to each drawer 2 on the inner side surface of the left elevating rod 6, only the same pressing projection 14 as described above is fixed.

Further, the engaging holes 1 are formed at the upper ends of the both lifting rods 6.
6 is bored, and a tip end portion 17a of a rocking plate 17 which is bent in a stepwise manner is fitted in both engagement holes 16 so as to be slightly movable in the vertical direction (see FIGS. 6 and 9). .

As shown in FIG. 9 in particular, the oscillating plate 1
A hook 18 is projected rearward from a rear plate 17b of the box 7, and the hook 18 is provided in a long hole 20 formed in a supporting member 19 fixed to the back surface of the upper plate of the box body 1. Engagement is engageable.

An automatic lock device 21 shown in FIGS. 6 to 8 is arranged on the rear side of the upper left inside surface of the box body 1. The automatic lock device 21 has a base plate 22 fixed mainly on the upper left inner surface of the box body 1, and a projecting piece 23 formed on the base plate 22. Notch 25 formed in the upper part of the front end (see FIG. 9)
A swing link 26 for supporting the vicinity of the tip portion 17a of the swinging plate 17 from below via an electromagnetic solenoid 29, and an electromagnetic solenoid 29 fixed to a mounting plate 28 fixed to the substrate 22 via a bolt 27. To be done.

A shaft 29a which vertically expands and contracts is fitted above the electromagnetic solenoid 29, and a connecting plate 31 having a horizontal plate 30 at the lower end is attached to the tip thereof.
The upper end of the connecting plate 31 has a shaft 32 and a rotary link 2
6 is pivotally attached to the rear end.

The horizontal plate 30 is fixed to the mounting plate 28 in the vertical direction with a predetermined distance therebetween and is fixed to the upper and lower control members 3.
It is possible to move between 3 and 33 '.

Numeral 34 is a biasing spring, one end of which is attached to the rear end of the rotary link 26 and the other end of which is attached to the upper end of a mounting bolt 36 which is attached to the base plate 22. The electromagnetic solenoid 29 is urged in the rotating direction.
Is designed to assist the contracting force of the shaft 29a.

The electromagnetic solenoid 29 is an electromagnetic cylinder lock 35a having a key hole 35a exposed at the upper front part of the box 1.
The shaft 29a of the electromagnetic solenoid 29 is contracted by the key operation via the, and the rotary link 26 is rotated around the shaft 24.

In the apparatus constructed as described above, when all the drawers 2 are pushed in and the electromagnetic cylinder lock 35 is unlocked, the shaft of the electromagnetic solenoid 29 is driven by the weight of the lifting rod 6 as shown in FIG. 29a extends so that the front end of the rotary link 26 holds the front end of the swing plate 17 at the lower position.

As shown in FIG. 2, both lifting rods 6 are at the lower limit due to their own weight (that is, the lifting rod 6 is suspended from the tip 17a of the rocking plate 17 via the upper side of the engaging hole 16). When doing so, the rear end of the inclined groove 15 of each guide tool 11 is located immediately before the protrusion 5 of each drawer 2. Therefore, each drawer 2 can be freely drawn out, and the gripping tool 8 and the fitting 9 of the catch 7 are vertically separated as shown in FIG.

As shown in FIG. 3, for example, when the middle drawer 2 is pulled out, the right protrusion 5 pushes up the push-up protrusion 13 when passing through the slanted groove 15 of the middle guide tool 11. All the guide tools 11 are lifted together with the other lifting rod 6, and the fitting tool 9 that moves up together fits into the gripping tool 8 and elastically engages as shown in FIG. 5B.

Even after the protrusion 5 has passed, the elevating rod 6 on the right side does not descend, and the other protrusions 5 are positioned immediately below the rear end face 14a of the push-down protrusion 14. Therefore, the upper and lower drawers 2
The protrusion 5 cannot be pulled out because its front is blocked by the pressing protrusion 14 of each guide 11. At this time, the left elevator 6
Remains at the lower limit, and does not hinder the movement of the left-hand projection 5 at all.

In the above state, when the middle drawer 2 is pushed in, the right protrusion 5 pushes down the pushing projection 14 when passing through the inclined groove 15 of the middle guiding tool 11 from the front side, so that it moves up and down. The rod 6 is also lowered, the fitting 9 of the catch 7 is forcibly disengaged from the gripper 8, and the elevating rod 6 on the right side is further lowered a little by its own weight to the state shown in FIG. All drawers 2 can be withdrawn.

When the electromagnetic cylinder lock 35 is locked in the state shown in FIGS. 2 and 7, the shaft 29a of the electromagnetic solenoid 29 contracts as shown in FIG. 8 to rotate the rotary link 26 counterclockwise. Therefore, the tip of the turning link 26 turns the rocking plate 17 upward, and the two lifting rods 6 suspended and supported by the tip 17a of each of the guides 1 are moved as shown in FIG.
1, the upper part of the rear end face 14a of the push-down projection 14 covers the front of each of the protrusions 5, so that all the drawers 2 in the left and right rows are locked so that they cannot be drawn out.

In addition, at this time, the catches 7 are not engaged because the lifting rods 6 do not rise as much as the above-described simultaneous pull-out prevention time. Therefore, if the power supply to the electromagnetic solenoid 29 is stopped again, as shown in FIG.
9, the shaft 29a is extended again, and the lifting rod 6 is lowered by its own weight and released as shown in FIG.

According to the simultaneous withdrawal prevention / electrical locking / unlocking device in the multi-stage drawer cabinet according to the embodiment of the present invention, the raising / lowering rod capable of locking / unlocking all the drawers simultaneously by moving in the vertical direction is provided in the box body. Since the electromagnetic solenoid provided on the inner side surface can be used for movement, the depth of the drawer can be effectively obtained.

In addition, the anti-shock device for preventing the cabinet from toppling due to the simultaneous opening of a plurality of drawers has a simple link structure in which only a link for connecting to a lifting rod inside the box and an electromagnetic solenoid are added. The electric type applying / releasing device can be easily provided in the cabinet having the anti-tilt device.

10 and 11 show a cabinet body 1 as another embodiment of the present invention. The lifting rod in the embodiment of the present embodiment is divided into three parts corresponding to the respective drawers 2, and the upper end of each of these lifting rods 40 abuts on a protrusion 43 provided on the side surface of the drawer 2. A locking cam 44 having a possible contact piece 41 and a push-up piece 42 as a locking member that rotates upward in conjunction with the rotation of the contact piece 41 is pivotally mounted.

Each of these elevating rods 40 is normally positioned at the lower limit due to its own weight as shown in FIG.
Further, a regulation member 45 that abuts and regulates the upper limit of the lifting rod 40 is fixed to the back surface of the upper plate 1a.

At the rear position of the lifting rod 40 of the upper plate 1a, when each lifting rod 40 is at the lower limit position as described above,
A fitting member 47 capable of penetrating into the allowable space S formed between the locking cam 44 of the uppermost lifting rod 40 and the back surface of the top plate 1a.
An electromagnetic solenoid 46 is fixedly attached to the tip of the shaft 46a.

Also in the cabinet of the present embodiment configured as described above, although not particularly shown, an electromagnetic cylinder lock having a key hole is formed on the front surface of the upper plate 1a similarly to the above-described embodiments. The electromagnetic solenoid 46 can be operated.

In the unlocked state as shown in FIG. 11, the shaft 46a of the electromagnetic solenoid 46 is contracted, so that the lifting rod 40 can be moved to the regulating member 45 and the uppermost locking cam 44 can be rotated. Is allowed. Therefore, it is possible to draw out any drawer 2.

Here, for example, when the drawer 2 in the middle stage is pulled out, the protrusion 43 moves in the same direction to rotate the locking cam 44 via the contact piece 41. As a result, the push-up piece 42 pushes up the elevating rod 40 above it to the upper limit. In this state, the locking cams 44 of the upper and lower lifting rods 40 are
Since the rotation is regulated by the regulating member 45 and the lower end of the elevating rod 40 in the middle stage, and the abutting pieces 41 are in a position in which the forward movement of the protrusion 43 is abutted, the other upper and lower drawers 2 Cannot be withdrawn.

Next, as shown in FIG. 10, when the drawer 2 is housed in the box body 1 and the locking operation is performed by the electromagnetic cylinder lock, the shaft 46a of the electromagnetic solenoid 46 expands and enters the allowable space S. The fitting member 47 is fitted. Therefore, the vertical movement of each elevating rod 40 is restricted, and all the locking cams 44 cannot be rotated at the positions where the movement of the protrusions 43 is restricted, so that all drawers 2 are locked.
If the unlocking operation is performed again, the shaft 46 of the electromagnetic solenoid 46 is
a is contracted to the state shown in FIG.

As described above, even in the cabinet equipped with the drawer collapse prevention device according to the embodiment, all the drawers can be electrically locked and unlocked at the same time through the electromagnetic solenoids, and the above-mentioned embodiment is also possible. The same effect as that of the above embodiment is obtained.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are changes and additions within the scope not departing from the gist of the present invention, the present invention is not limited. Included in the invention.

[0040]

The present invention has the following effects.

(A) According to the invention of claim 1, the elevating rod which can be locked and unlocked at the same time by moving in the vertical direction is moved by using an electromagnetic solenoid arranged on the inner surface of the box body. By making it possible, the depth of the drawer can be effectively taken. In addition, with a simple linkage structure that only adds an electromagnetic solenoid that gives a driving force to regulate the vertical movement of the lifting rod to the anti-tilt device to prevent the cabinet from toppling due to simultaneous opening of multiple drawers, It is possible to easily provide an electric applying / releasing device in the cabinet having the device.

(B) According to the second aspect of the invention, a link for connecting to the elevating rod and an electromagnetic solenoid are simply added to the collapse prevention device for preventing the cabinet from falling due to simultaneous opening of a plurality of drawers. With a simple linkage structure, it is possible to easily install the electric type applying / releasing device in the cabinet having the anti-tilt device.

(C) According to the third aspect of the invention, since the movement similar to the extension of the shaft of the electromagnetic solenoid can be transmitted to the link by sliding the sliding plate by the key operation, the link structure can be further improved. Can be simplified.

(D) According to the fourth aspect of the invention, an electromagnetic solenoid having a fitting member that can be retracted and retracted above the elevating rod is provided as a collapse prevention device for preventing the cabinet from falling due to simultaneous opening of a plurality of drawers. With a simple structure that only needs to be added,
It is possible to easily provide the electric type applying / releasing device to the cabinet having the anti-tilt device.

[0045]

[Brief description of drawings]

FIG. 1 is a perspective view showing a document storage cabinet to which the present invention is applied.

FIG. 2 is a side view showing the cabinet in which the locking / unlocking device is in an unlocked state.

FIG. 3 is a side view showing the cabinet from which the drawer is pulled out in a state where the locking / unlocking device is unlocked.

FIG. 4 is a side view showing the cabinet in which the locking / unlocking device is in a locked state.

5 (a), 5 (b) and 5 (c) respectively show A-
FIG. 3 is a sectional view taken along line A, a sectional view taken along line BB of FIG. 2, and a sectional view taken along line CC of FIG.

FIG. 6 is an enlarged plan view of a main part of the cabinet of FIG.

FIG. 7 is a side view showing the locking / unlocking device of the cabinet in the state of FIG.

FIG. 8 is a side view showing the locking / unlocking device of the cabinet in the state of FIG.

FIG. 9 is an enlarged perspective view of a main part of the locking / unlocking device.

FIG. 10 is a side view showing a structure inside a cabinet as another embodiment of the present invention.

FIG. 11 is a side view showing an operation corresponding to the cabinet of FIG.

[Explanation of symbols]

 1 Box 1a Upper plate 2 Drawer 3 Guide rail 4 Traveling rail 5 Protrusion 6 Elevating rod 7 Catch 8 Grasping tool 8a Locking piece 9 Fitting tool 9a Fitting part 9b Mounting part 10 Support plate 11 Guide tool 12 Board 13 Push-up protrusion 14 Depressing protrusion 14a Rear end surface (stopper surface) 15 Inclined groove 16 Engagement hole 17 Swing plate 17a Tip part 17b Rear plate 18 Hook 19 Support tool 20 Long hole 21 Automatic locking device 22 Board 23 Projecting piece 24 Shaft 25 Notch 26 times Dynamic link 27 Bolt 28 Mounting plate 29 Electromagnetic solenoid 29a Shaft 30 Horizontal plate 31 Connecting plate 32 Shaft 33, 33 'Restricting member 34 Energizing spring 35 Electromagnetic cylinder lock 35a Key hole 36 Mounting bolt 40 Elevating rod 41 Abutting piece 42 Pushing up Piece (locking member) 43 Protrusion 44 Locking cam 45 Restricting member 46 Electromagnetic solenoid 46a Shaft 47 Fitting Wood S Motodo space

Claims (4)

[Claims] 1. In a multi-stage drawer cabinet in which a plurality of drawers are vertically mounted in a box body, an elevating rod is mounted on an inner side surface of the box so as to be vertically movable, and a protrusion is provided on a side surface of each drawer opposed thereto. And a guide tool capable of restricting the movement of the protrusion is provided on the inner side surface of the box body, and the movement of the protrusion of another drawer is restricted by the guide tool when the predetermined one drawer moves forward. In addition, an electromagnetic solenoid is provided on the inner surface of the box body for giving a driving force to regulate the vertical movement of the lifting rod according to a signal from the locking / unlocking switch. A simultaneous withdrawal prevention and electric locking / unlocking device in a multi-stage drawer cabinet characterized in that all drawers can be locked and unlocked at the same time by stopping at. 2. In a multi-stage drawer cabinet in which a plurality of drawers are vertically mounted in a box body, an elevating rod mounted vertically movable on an inner surface of the box and side surfaces of the drawers facing each other. On one side, a protrusion is provided, and on the other side, a stopper surface that prevents the movement of each drawer forward by contacting with the protrusion by making the lifting rod move upward so as to be at the same height as the protrusion. , A pusher that slides in contact with the protrusion to move the elevating rod upward by moving the drawer forward, and slides in contact with the protrusion when the drawer moves rearward to lower the elevating rod. While providing a guide including a pressing portion, on the inner surface of the box body to which the lifting rod is mounted,
An electromagnetic solenoid is provided which can be linked with the lifting rod to move the lifting rod up and down in response to a signal from the locking / unlocking switch.The electromagnetic solenoid moves the lifting rod upward to lock all drawers at the same time, and An electric lock / unlock device for preventing simultaneous withdrawal in a multi-stage drawer cabinet, characterized in that all the drawers are unlocked at the same time by moving the lifting rod downward. 3. The simultaneous withdrawal prevention / electrical locking / unlocking device for a multistage drawer cabinet according to claim 2, wherein a spring for urging the elevating rod upward is provided on the inner side surface of the box body. 4. A plurality of drawers are mounted vertically in a multi-stage lock in a box body, and a plurality of lifting rods are respectively mounted so as to have a predetermined allowable space in the vertical direction of the side surface of the box body, and each of them is opposed to each other. A protrusion is provided on a side surface of the drawer, and an abutment piece that comes into contact with the protrusion by the movement of the drawer is provided at an upper end or a lower end of each of the elevating rods, and a locking member that can be engaged with and disengaged from the allowable space. A locking cam is rotatably pivotally mounted, the locking member is engaged in the allowance space when the drawer moves forward, restricts the movement of all lifting rods, and moves from the allowance space when the drawer moves backward. It is deviated to allow the movement of all the lifting rods, and at the inner side surface of the box, a fitting member for restricting the upward movement of the uppermost lifting rod by the signal from the locking / unlocking switch is provided. Electromagnetic Solenoid that can freely appear and disappear above the upper lifting rod A lock is provided, and the electromagnetic solenoid controls the upward movement of the uppermost elevating rod by this fitting member to lock all the drawers at the same time. Simultaneous withdrawal prevention and electric locking / unlocking device in a multi-stage withdrawal cabinet, which is characterized by unlocking at the same time.