JPH10184152A - Locking and unlocking device for multi-stage drawer cabinet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily shut drawers even when a lock is operated for closure with a part of the drawers kept open, and unlock all the drawers even upon the occurrence of a failure in an electrically locked state. SOLUTION: A spring 34 having an energizing force weaker than the axial holding force of an electromagnetic solenoid 29 is provided between the electromagnetic solenoid 29 and an operation lever 26 so as to energize a shaft 29a in a moving direction at the time of locking. As a result, a drawer opened at the time of locking can easily shut, and all drawers are automatically locked after the drawer is shut. Also, the operation lever 26 is provided with balancing means with an elevation lever 6. According to this construction, even when an electromagnetic solenoid having a small axial shrinkage force is used, the operation lever 26 is properly moved for causing the vertical travel of the elevation lever 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking / unlocking device for a multi-stage drawer cabinet in which a plurality of drawers are vertically mounted in a box body.

[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. Especially when locking and unlocking many cabinets, in the case of locks, key operation is required for each cabinet, whereas in the case of cabinets equipped with this device,
Simultaneous locking and unlocking of each cabinet is possible by making the central control unit control the electromagnetic solenoid of each cabinet, locking and unlocking work is very easy, simultaneous locking of all cabinets when leaving the office, all cabinets when leaving the office Can be unlocked simultaneously, which is effective in preventing theft of documents and the like.

[0004]

However, in such an apparatus, locking is performed while the drawer is opened properly, and the user tries to close the opened drawer without knowing the locked state. In doing so, there is a problem that not only each component of the locking device may be damaged, but also to close the drawer in such a state, it is necessary to perform a key operation of a lock for each drawer.

Further, a lock is provided for each drawer, and the latch can be rotated by the lock to release the engagement between each latch claw and the engaging member. In the event of a power outage or failure of an electrical device, etc. in the locked state, in order to unlock each drawer, all drawers can be opened unless a key is inserted into the lock of each drawer and operated. And the operation is troublesome.

Therefore, a lock and a mechanism for linking the lock and the latch claw are required for each drawer, so that the apparatus becomes expensive.

The present invention has been made in view of such a problem, and a first object is to easily close a drawer even if a part of the drawer is locked while being opened. A second object of the present invention is to provide a locking / unlocking device in a multi-stage drawer cabinet which can be installed in a proper position of a box when a power failure or a failure of an electric device occurs in an electrically locked state. It is an object of the present invention to provide a locking / unlocking device for a multi-stage drawer cabinet which is capable of unlocking all drawers at the same time by the key operation of the cylinder lock, and which has a simple structure and is inexpensive.

[0008]

In order to achieve the above-mentioned object, the present invention provides a multi-stage drawer cabinet with a plurality of drawers mounted vertically in a multi-stage manner in a multi-stage drawer cabinet. A lifting and lowering rod is mounted so as to be vertically movable, and between the lifting and lowering rod and each of the drawers, a locking and unlocking device in a multi-stage drawer cabinet provided with engaging and disengaging means capable of simultaneously locking and unlocking all drawers by vertical movement of the lifting and lowering rod. An electromagnetic solenoid capable of moving an operating rod capable of vertically moving the lifting and lowering rod in cooperation with the lifting and lowering rod is fixed to the box body, and has a biasing force from the shaft holding force of the electromagnetic solenoid. The invention is characterized in that a weak spring is provided between the electromagnetic solenoid and the operating rod so as to urge the shaft of the electromagnetic solenoid in a direction in which the shaft operates when locked. According to this feature, the spring having a weaker urging force than the shaft holding force of the electromagnetic solenoid is provided between the electromagnetic solenoid and the operating punch so as to urge in a direction in which the shaft of the electromagnetic solenoid moves at the time of locking, so that the spring is opened at the time of locking. The drawer that has been closed can be easily closed, and all drawers are automatically locked after the drawer is closed. Further, since the operating rod is provided with a means for balancing with the lifting rod, even if an electromagnetic solenoid having a small shaft contraction force is used, the operating rod can be reliably moved and the lifting rod can be moved up and down. .

In the locking and unlocking device for the multi-stage drawer cabinet of the present invention, it is preferable that another cylinder lock that can be manually or electrically operated to be able to move the elevating rod up and down by a key operation is provided at an appropriate position of the box. In this way, if a failure or the like of an electric device occurs in an electrically locked state, the locking of all drawers can be simultaneously unlocked by operating a key of another cylinder lock provided in a proper position of the box. Therefore, it is excellent in operability, and it is not necessary to provide a lock and a mechanism linked to the lock for each drawer, so that the structure of the entire apparatus is simplified and an inexpensive apparatus can be provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a cabinet for storing documents to which the present invention is applied. The drawers 2 are accommodated in the 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.

An elevating rod 6 slightly shorter than the height of the box 1 is supported by a support plate 10 (see FIG. 2) vertically on both inner side surfaces of the box 1 so as to be able to move up and down. Between the lower end of the middle-right lifting rod 6 and the lower end of the right side plate,
A catch 7 made of synthetic resin is provided.

The front end surface of the upper plate 1a of the box 1 has key holes 35a for an electromagnetic cylinder lock and a manual cylinder lock, which will be described later.
54a are respectively formed. An electric cylinder lock may be used instead of the manual cylinder lock.

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 push-up protrusions 13 are provided on the upper side surface of the substrate 12, and upward chevron-like push-down protrusions (stoppers) 14 are continuously provided on the lower side surface of the substrate 12.
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.

An automatic lock device 21 shown in FIG. 6 to FIG. The automatic lock device 21 mainly includes a substrate 22 fixedly provided on the upper left inner surface of the box 1 and a projecting piece 23 formed on the upper portion of the substrate 22 so as to be rotatable about a shaft 24. A rotation link 26 is provided as an operating rod, and an electromagnetic solenoid 29 is attached to the substrate 22.

The front end of the rotary link 26 is pivotally supported by a support 19 and supports the rocking plate 17 for locking the left and right elevating rods 6 from below, while the rear end is balanced with the elevating rod 6. A balancer 28 as a means is attached.

In front of the rocking plate 17, the manual cylinder lock 5 is opened such that a key hole 54a is opened at the front end face of the upper plate 1a of the box 1.
The manual cylinder lock 54 is provided with a sliding contact rod 5 which is rotated by a key operation from a key hole 54a.
5 protrudes rearward. And the sliding contact rod 55 is
When a lock device 21 described later is in an electrically locked state,
The oscillating plate 17 comes into sliding contact with the upper side.

A shaft 29a which extends and contracts in the up-down direction is fitted above the electromagnetic solenoid 29, and a connecting plate 31 having an upper end connected to the rotating link 26 with the shaft 32 is attached to the tip of the shaft 29a. . The shaft 32 is inserted into the rotation link 26 through a long hole 31 a formed in the connecting plate 31.

At the lower end of the connecting plate 31, a horizontal plate 30 is provided movably between upper and lower regulating members 33 and 33 'fixed to the mounting plate 22 at a predetermined distance from each other in the vertical direction.

Reference numeral 34 denotes a biasing spring having one end attached to the rotating link 26 and the other end attached to the shaft 29a, and constantly biases the rotating link 26 in a counterclockwise direction. The biasing force is weaker than the holding force of the shaft of the electromagnetic solenoid 29 and the lifting rod 6
Has a pulling force capable of moving upward. An auxiliary spring 29b assists a force of the shaft 29b in the extension direction.

The shaft 29a of the electromagnetic solenoid 29 is
The key is operated via an electromagnetic cylinder lock 35a having a key hole 35a exposed at the upper part of the front surface of the rotary link 2 so as to be vertically expanded and contracted.
6 is rotated about a shaft 24.

In the device constructed as described above, when the full drawer 2 is pushed in and the electromagnetic cylinder lock 35 is unlocked, as shown in FIG. 5, the rear end of the inclined groove 15 of each guide tool 11 is located immediately before the protrusion 5 of each drawer 2, and the gripping tool 8 and the fitting 9 of the catch 7 are as shown in FIG. And are separated vertically. Therefore, each drawer 2 can be freely drawn. At this time, the electromagnetic solenoid 2
Nine shaft 29a is in an extended state.

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 inclined groove 15 of the middle guide 11, and All the guides 11 are raised together with the lifting rod 6, and the fittings 9 that rise together are fitted into the grips 8 and elastically engaged as shown in FIG. 5B.

After the passage of the protruding member 5, the right elevating rod 6 does not descend, and the other protruding members 5 are located immediately below the rear end surface 14a of the pressing projection 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 rightward projection 5 pushes down the push projection 14 when passing through the inclined groove 15 of the middle guide 11 from the front. The rod 6 is also lowered, and the fitting 9 of the catch 7 is forcibly disengaged from the gripper 8, and the right lifting rod 6 is further lowered slightly by its own weight to be in the state shown in FIG. The withdrawal of all the drawers 2 becomes possible again.

In the state shown in FIGS. 2 and 6, when the electromagnetic cylinder lock 35 is locked, the shaft 29a of the electromagnetic solenoid 29 contracts as shown in FIG. 7, and the urging spring 34 moves the rear end of the rotary link 26 downward. And rotate it counterclockwise. At this time, since the tension of the rotating link 26 by the urging spring 34 is assisted by the weight of the balancer 28, the urging spring 34 does not expand and the contraction force of the shaft 29a is not absorbed.

Therefore, the tip of the rotating link 26 is
Are lifted upward, and both lifting and lowering rods 6 suspended and supported at their distal ends by engaging holes 16 are slightly raised together with the guides 11 as shown in FIG. Since the upper part of 14a covers the front of each protrusion 5, all the drawers 2 in both the left and right rows are locked so that they cannot be pulled 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, when 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.

Further, when the drawer 2 is to be closed when the lock device 21 is locked with the drawer 2 opened, the downward movement of the elevating rod 6 is effected by the above-described tilt-down device. , The rotating link 26 is about to rotate clockwise. At this time, the shaft 29 of the electromagnetic solenoid 29
a is held in a contracted state, but the urging spring 34 expands and the shaft 32 is slid upward through the elongated hole 31a, so that the rotation of the rotation link 26 and the lifting rod 6 Is allowed to move downward, so that the drawer 2 can be closed.

At the same time as the drawer 2 is completely closed, the rear end of the rotary link 26 is automatically returned downward by the return force of the biasing spring 34 and the weight of the balancer 28, and returns to the locked state. Will be.

If the lock device 21 has become stuck in the locked state for some reason, the sliding rod 55 is operated by a key operation through the key hole 54a of the manual cylinder lock 54.
Is rotated, even if the shaft 29a of the electromagnetic solenoid 29 is kept in the contracted state and does not move, the urging spring 34 expands as described above, and the shaft 32 slides upward through the long hole 31a. By being moved, the rotation of the rotation link 26,
And the downward movement of the lifting rod 6 is allowed, and all the drawers 2 can be unlocked simultaneously.

As described above, according to the multistage drawer cabinet locking / unlocking device according to the embodiment of the present invention, the electromagnetic solenoid main body resists the urging force of the spring while the shaft of the electromagnetic solenoid remains locked. One hand-operated cylinder installed in the proper position of the box in the event of a power outage or failure of an electric device while it is electrically locked, because it can slide in the same direction as the shaft of the electromagnetic solenoid Locking of all drawers can be unlocked simultaneously by operating the key of the lock.

The urging spring 34, which has a lower urging force than the holding force of the shaft 29a of the electromagnetic solenoid 29, is connected to the electromagnetic solenoid 2.
9 is provided between the electromagnetic solenoid 29 and the rotating link 26 so as to urge the shaft 29a in the moving direction at the time of locking, so that the drawer opened at the time of locking can be easily closed and the drawer can be closed. After that, all drawers are automatically locked. In addition, since the rotating link 26 is provided with the balancer 28 as a means for balancing the lifting link 6, even if an electromagnetic solenoid 29 having a small holding force on the shaft 29 a is used, the rotating link 26 can be reliably moved. Thus, the lifting rod 6 can be moved up and down.

Further, since all the drawers can be unlocked at the same time by operating the key of one cylinder lock, there is no need to provide a lock or a mechanism linked to the lock for each drawer, thus simplifying the structure of the entire apparatus. Thus, an inexpensive device can be provided.

Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are changes and additions without departing from the gist of the present invention. Included in the invention.

[0036]

The present invention has the following effects.

(A) According to the first aspect of the present invention, the electromagnetic solenoid and the operating punch are biased so that a spring having a weaker urging force than the shaft holding force of the electromagnetic solenoid is urged in a direction in which the shaft of the electromagnetic solenoid moves when locked. By providing it in between, the drawer that was open at the time of locking can be easily closed,
After the drawers are closed, all drawers are automatically locked. Further, since the operating rod is provided with a means for balancing with the lifting rod, even if an electromagnetic solenoid having a small shaft contraction force is used, the operating rod can be reliably moved and the lifting rod can be moved up and down. .

(B) According to the second aspect of the present invention, in the event of a power failure or failure of an electric device in the state of being electrically locked, key operation of another cylinder lock provided in an appropriate position on the box body. Because the locks of all drawers can be unlocked at the same time, the operability is excellent, and there is no need to provide a lock or a mechanism linked to the lock for each drawer, simplifying the structure of the entire device,
An inexpensive device can be provided.

[0040]

[Brief description of the 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 a side view showing the cabinet locking and unlocking device in the state of FIG. 2;

FIG. 7 is a side view showing the cabinet locking / unlocking device in the state of FIG. 4;

FIG. 8 is a side view showing the locking and unlocking device when the drawer is closed in the locked state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box 1a Upper plate 2 Drawer 3 Guide rail 4 Running rail 5 Protrusion 6 Elevating rod 7 Catch 8 Gripping tool 8a Locking piece 9 Fitting tool 9a Fitting part 9b Mounting part 10 Support plate 11 Guide tool 12 Substrate 13 Push-up projection 14 Pressing projection 15 Inclined groove 16 Engagement hole 17 Rocking plate 19 Supporting tool 21 Automatic locking device 22 Substrate 23 Projection piece 24 Shaft 26 Rotating link (operating rod) 28 Balancer (balance means) 29 Electromagnetic solenoid 29a Shaft 30 Horizontal plate 31 Connecting plate 31a Long hole 32 Shaft 33, 33 'Restriction member 34 Energizing spring 35 Electromagnetic cylinder lock 35a Key hole 54, 54a Manual cylinder lock 55 Sliding rod

Claims (2)

[Claims] 1. A plurality of drawers are vertically mounted in a multi-stage manner in a box body, and an elevating rod is mounted on an inner surface of the box so as to be vertically movable, and a lifting rod is provided between the elevating rod and each of the drawers. A locking / unlocking device in a multi-stage drawer cabinet provided with engaging / unengaging means capable of simultaneously unlocking / unlocking all drawers by up / down movement, comprising a means for balancing with the elevating rod, and being able to move the elevating rod up and down in conjunction with the elevating rod. An electromagnetic solenoid capable of moving the operating rod is fixed to the box body, and the electromagnetic solenoid and the operating rod are biased so that a spring having a weaker urging force than the shaft holding force of the electromagnetic solenoid is urged in a direction in which the shaft of the electromagnetic solenoid works when locked. And a locking / unlocking device for a multi-stage drawer cabinet. 2. A multi-stage drawer cabinet according to claim 1, wherein another cylinder lock that can be moved up and down by a key operation and that is manually or electrically operated is provided at an appropriate position of the box body. Locking / unlocking device.