JPS6132061Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a locking device for a multi-drawer type cabinet.

[Conventional technology and its problems]

In multi-drawer type cabinets, it is well known that a device for preventing double drawer drawers and an all-lock mechanism are provided using common members. However, conventionally, as shown in, for example, Japanese Utility Model Application Publication No. 54-26, a double drawer prevention mechanism and a lock mechanism are provided on the right or left inner side of the cabinet, and the side of each drawer is locked. Therefore, if you try to pull out the drawer while it is locked (or locked), there is a risk that the drawer will become distorted, the locking means may be deformed, or the drawer may be twisted and become unlatched. In particular, the wider the cabinet, the greater the problem. For this reason, in cabinets with wide openings, the left and right sides of the drawer must be locked at the same time, resulting in a complicated structure.

On the other hand, in Japanese Utility Model Application Publication No. 51-49223, a vertical shaft is provided at the center of the rear surface of the inside surface of the cabinet and is held at only one rotational position by a spring lever device. A double drawer prevention mechanism is disclosed in which each drawer is locked against the drawer. With this structure, the substantially central part of the back of the drawer is locked, so it is difficult to pull out the locked drawer. However, the drawer does not get twisted, and even if the cabinet has a wide opening, the drawer only needs to be locked in one place.Although it has a simple structure, it improves theft prevention and the durability of the double drawer prevention device. It has the advantage of being able to achieve

The present invention is configured so that the double drawer prevention device disclosed in the above-mentioned Japanese Utility Model Publication No. 51-29223 can be used in common with the all-lock device, thereby reliably preventing double drawers with a simple structure even in a wide-opening cabinet. This allows all locks to be performed.

[Means for solving problems]

That is, in the present invention, in a multi-stage drawer type cabinet in which a plurality of drawers are installed in a multi-tiered manner in a cabinet main body, a vertical shaft is pivotally supported in the cabinet main body at a position approximately in the center with respect to the left and right direction. However, at the tip of the lever protruding from the vertical shaft,
One end is engaged with the other end of a spring that is engaged with the cabinet body on the opposite side of the lever across the vertical shaft, and a first engaging portion is provided at the rear end of each of the drawers, while a first engaging portion is provided on the rear end of each drawer. A locking piece is fixed to each position of each drawer, and each locking piece has a locking piece attached to the first engaging portion of the drawer at the push-in position as the locking piece rotates in one direction. A notched locking portion is formed that engages with the drawer, and the first locking piece is configured to rotate the locking piece in the disengagement direction by the pushing movement of the drawer. A second locking portion is provided at the end so that the locking piece is rotated in a direction in which the notch locking portion engages with the first locking piece as each drawer is pulled out; An operating lever is provided in the cabinet main body for interlocking with the locking and unlocking operations of a push-in lock provided on the front surface of the cabinet main body or the front plate of the one drawer, and the lever is provided with a downward engaging portion; The operating rod includes an upward engaging portion that can be engaged with and disengaged from the downward engaging portion;
A cam part is provided that contacts a roller provided on the cabinet body, and the positional relationship between the roller and the cam part is such that the upward engaging part engages with the downward engaging part by locking the push-in lock. The vertical shaft is rotated in one direction, and the upward engaging portion and the downward engaging portion are disengaged in the unlocked state.

[Example] Next, an example in which the present invention is applied to a fireproof filing cabinet will be described based on the drawings.
The top and bottom 2, base plate, left and right side plates 3, 3, and back plate 4 of the cabinet body 1 are each constructed of thick walls filled with a fire-resistant concrete material or the like. Reference numeral 5 denotes a drawer provided in the cabinet body 1 so that the drawer can be freely drawn out, and the front plate 6 of the drawer 5 is also constructed of a fire-resistant thick wall similar to the above.

Front plate 6 of the uppermost drawer 5 among the drawers 5
is provided with a push-in lock 7 that becomes locked when pushed in against a spring force, and a contact portion 8 at the rear end is brought into contact with the front end of a longitudinally movable rod 9, which will be described later.

Reference numeral 10 denotes a vertically elongated support member provided vertically and longitudinally at approximately the center in the left-right direction of the inner surface of the back plate 4 of the cabinet body 1, and reference numeral 11 denotes a vertically elongated support member provided at approximately the lower end of each drawer 5 on the front surface of the support member 10. Each bracket 11 is cut and raised at each corresponding location.
A vertical shaft 12 having a rectangular cross section is inserted through the bracket 11, and a cylindrical base of a locking piece 13, which is integrally fitted onto the vertical shaft 12, is rotatably supported by a bracket 11.

Each of the locking pieces 13 is provided with a cutout locking portion 14 at a portion that becomes the front surface when the locking piece 13 rotates in the locking direction (direction A) and near the proximal end, while a notch locking portion 14 is provided at a portion near the distal end and A stopper part 15 is provided on the rear side opposite to the notch locking part 14, and further, in front of this stopper part 15, there is a slope that is low in height on the front side and increases in height toward the rear side. A surface 16 is formed.

Reference numerals 17 and 18 denote a pair of rod-shaped first and second engaging parts on the left and right sides in plan view provided on the bracket 19 protruding from the back plate 5' of each drawer 5, and the first engaging part on the left side 17 can be locked to the notch locking part 14,
On the other hand, the second engaging portion 18 on the right side is attached to be vertically slidable and is biased downward by a spring 20, so that the height position of the lower end surface of the second engaging portion 18 is It is set so that it can come into contact with the inclined surface 16 of the locking piece 13. These first and second
The engaging parts 17 and 18 are arranged so that the first engaging part 17 is located closer to the back plate 5' of the drawer, and the second engaging part 18 is shifted rearward by an appropriate dimension l1 with respect to the first engaging part 17. It is set up as follows.

Reference numeral 21 indicates an appropriate angle θ to the left and right of the vertical axis 12.
The spring lever device 21 is a spring lever device that can be rotated to maintain its posture at either the left or right position.
A base member 22' is fixed to the upper front end of the support member 10, and a spring support piece 24 for quick return is pivoted to the base member 22 by a pivot means 25 so as to be horizontally rotatable. .

Further, a first spring 26 is mounted between the rear end of the spring support piece 24 and the tip of the lever 23 that is integrally attached to the vertical shaft 12. If the point where the first spring 26 is attached to the tip of the lever 23 crosses the so-called fulcrum with respect to the straight line connecting the pivot point 25 of the support piece 24 and the axis of the vertical shaft 12, which is the pivot point of the lever 23. , the tip of the lever 23 is urged to face in the direction beyond that, and the base end of the lever 23 is rotated until one of the contact portions 23a and 23b on the left and right sides comes into contact with the front surface of the support member 10, etc. On the other hand, when the lever 23 does not go beyond the fulcrum, in other words, when the lever 23 rotates within a range of 1/2 of the rotation angle θ of the vertical shaft 12, it quickly returns to its original state (so-called "clack"). (Return).

Reference numeral 9 denotes a longitudinally movable lever mounted on the right side plate 3 of the cabinet main body 1, and the front end of the longitudinally movable lever 9 is connected to the second
The push-in lock 7 is brought into contact with the rear end contact portion 8 by the biasing force of the spring 27, and when the push-in lock 7 is locked, it is pressed by the rear end contact portion 8 and the biasing force of the second spring 27 is applied. retreat against.

Reference numerals 2 and 8 are operating rods for horizontally operating the lever 23 of the spring lever device 21, and the right end of the operating rod 28 is connected to the longitudinally moving lever 9 via a bell crank lever 29, and The lower surface of the operating lever 28 is slidably supported by the upper surface of a roller 30 attached to the inner surface of the cabinet body 1, and the operating rod 28 is urged leftward by a third spring 35. In this case, when connecting the operating rod 28 and the bell crank lever 29 with the pin 37, the engagement hole 36 of the pin 37
is formed into a long hole, and the operating rod 28 is biased downward by a leaf spring 31.

a third spring 3 that biases the operating rod 28 to the left;
The spring force 5 is the second spring 2 that biases the longitudinally movable rod 9.
Make it smaller than the spring force of 7. Therefore, press lock 7
When the lock is unlocked, the longitudinally movable rod 9 is pulled toward the front, and the operating rod 28 is accordingly urged to the right against the third spring 35, while pushing the push-in lock 7. Then, the bell crank lever 29 rotates, and the operating rod 28 is moved to the left by the third spring 35.

The left end of the operating rod 28 is provided with an upward engaging portion 32 bent into an upward U-shape, etc., and a midway portion of the operating rod 28 is provided for leftward movement (locking direction) in FIG. Therefore, a cam portion 33 that rides on the roller 30 is formed. Therefore,
When the operating rod 28 moves to the left, the upward engaging portion 32 thereof engages the downward engaging portion 34 formed on the lower surface of the lever 23, rotating the lever 23 to the left, and engaging the vertical shaft 12 and its respective stages. While simultaneously rotating the stop pieces 13 to the left (rotating in the locking direction A),
When the operating rod 28 moves to the right, the upward engaging portion 3 rotates the lever 23 to the right.
2 is configured to disengage from the downward engaging portion 34.

In this case, the spring force of the first spring 26 in the spring lever device 21 is made smaller than the spring force of the third spring 35. Therefore, the three springs 26,3
The relationship between the spring forces of 5 and 27 is 26<35<27.

In the above configuration, if the drawers 5 of all stages are pushed into the cabinet body 1 and the push-in lock 7 is pushed in in this state, the longitudinally movable lever 9 retreats against the force of the second spring 27, and the In FIG. 3, the bell crank lever 29 rotates counterclockwise about the pivot shaft 38. Then, bell crank lever 2
Since the engagement hole 36 is no longer restricted by the pin 37 at 9, the operating rod 28 moves leftward due to the biasing force of the third spring 35, and the cam portion 33 in the middle rides on the roller 30, and the operating rod 28 The upward engaging portion 32 at the tip engages with the downward engaging portion 34 of the lever 23 to rotate the lever 23 to the left. As a result, the vertical shaft 12 attached to the lever 23 rotates clockwise, and each locking piece 1 attached to the vertical shaft 12 rotates clockwise.
3 rotate all at once to the position shown by the solid line in Figure 5,
The notch locking portion 14 engages with the first engaging portion 17 at the rear end of each drawer 5, and each drawer 5 is locked so that it cannot be pulled out.

In such a locked state, the line direction connecting the vertical shaft 12 and the first engaging portion 17 substantially coincides with the forward and backward movement direction of the drawer 5, so even if you try to pull out the drawer 5 in this locked state, each This prevents the locking piece 13 from coming off the first engaging portion 17 or causing the drawer 5 to become distorted due to the force of the drawing movement of the drawer 5.

Note that if the engagement hole 36 between the bell crank lever 29 and the operating rod 28 is formed into a long hole, and the three springs 26, 35, 27 are set in the above relationship,
Even when the push-in lock 7 is locked while any drawer 5 is pulled out, a so-called kick-in lock is enabled in which the drawer 5 can be locked at the same time as the drawer 5 is pushed in.

That is, the operating rod 28 and the bell crank lever 2
By making the engagement hole 36 with the lock lever 28 into an elongated hole, the operating rod 28 can move to the right against the force of the spring 35 even in the locked state. In FIG. 5, when any of the drawers 5 is pulled out and locked and then pushed in, the drawer 5 is pushed in (in the direction of the arrow A), and the first engagement portion 17 engages the locking piece 1
3 against the force of the first spring 26, rotating the locking piece 13 counterclockwise, and at the same time when it is pushed all the way in, the vertical shaft 12 rotates clockwise by the biasing force of the spring 27, and the notched locking portion 14 of each locking piece 13 fits into and locks into the first engagement portion 17, thereby locking all the drawers.

At this time, as the locking piece 13 rotates to escape, all the locking pieces 13 also temporarily rotate in the disengagement direction, but the spring support piece 24
Due to the so-called quick return phenomenon caused by the lever 23 and the first spring 26, each locking piece 13 quickly locks onto the first engaging portion 17, so that it quickly returns to the locked state.

When the push-in lock 7 is not locked, the second
Since the force of the spring 27 overcomes the force of the third spring 35, the operating rod 28 is in the position shown by the solid line in FIGS. 2 and 3, and the spring lever device 21 and the operating rod 28
is in an unrelated state.

When the lock is unlocked and all the drawers 5 are pushed in, each locking piece 13 is fully rotated counterclockwise as shown in FIG. 17, and as shown by the dashed line in FIG.
An engaging portion 18 is located at the rear of the stopper portion 15. When an arbitrary drawer 5 is pulled out from this state, the second engaging part 18 comes into contact with the back surface of the stopper part 15 of the locking piece 13, causing the locking piece 13 to rotate clockwise, and thereby vertically By rotating the shaft 12, all the locking pieces 13 are rotated in the clockwise direction at the same time, and the corresponding locking pieces 13 are connected to the first engaging portions 17 of the other drawers 5 that are in the pushed state. The notch locking portion 4 of the piece 13 engages, and locks the other drawer 5 so that it cannot be pulled out.

In this case, since the first engaging part 17 is located in front of the second engaging part 18 by the dimension l1, the first engaging part 17 is locked in the notch locking part 14 in the drawer 5 to be pulled out. The drawer 5 can be freely pulled out without having to do so, and the locking piece 13 can be turned clockwise by the action of the spring lever 13 device 21 by rotating only half of the way without any special guidance. Since it rotates, the locking piece 13 can be rotated in the engaging direction by simply pulling out the second engaging portion 18 toward the front.

Conversely, when you push in the drawn drawer 5, the locking piece 1
3 rotates counterclockwise while its front side is pressed by the first engaging part 17, and along with this, the locking pieces 13 that were engaged with the other drawers that were pushed in also rotate simultaneously. It rotates in the clockwise direction, and all the drawers 5 become in a state where they can be pulled out in the pushed state. In this case as well, since the second engaging part 18 is located toward the back of the cabinet by a certain distance l1 from the first engaging part 17, it becomes an obstacle when the first engaging part 17 comes into contact with the locking piece 13. Moreover, if the locking piece 13 rotates by half of the total rotation angle, it can be rotated by the spring lever device 21 without being guided by the first engaging portion 17. become.

Note that after pulling out any drawer 5, the spring lever device 21 may be unexpectedly activated due to vibration or the like, and the locking piece 13 may rotate in the disengagement direction, causing the drawer 5 and the locking piece to become disconnected. 13 will be in the relationship shown by the solid line in FIG. 4, and there is a possibility that the drawn drawer 5 will not be pushed in.
When the drawer 5 is pushed in, the second engaging part 18 is guided upward by the inclined surface 16, as shown in FIG. After that, the force of the spring 20 causes the stopper part 15 to fall to the rear, and the drawer 5
can be returned to the pressed state.

[Functions and effects of the idea]

As described above, in the configuration of the present invention, when the push-in lock is unlocked, the operating rod does not interfere with the rotation of the vertical shaft, and does not interfere with the rotation of the vertical shaft equipped with a spring lever device. On the other hand, when the push-in lock is locked, the rotation of the vertical shaft is restricted by the operation lever, and all the drawers are locked.

Therefore, according to the present invention, the following effects are achieved.

A vertical shaft is provided at approximately the center of the left and right inside the cabinet body, and the engaging portion at the rear end of each drawer is locked via a locking piece attached to this vertical shaft, so it is difficult to lock or lock the drawer. Even if I try to pull out the drawer,
The drawer will not twist left or right or there will be no gaps between the left and right sides of the drawer and the cabinet body, even if the cabinet has a wide opening.
Although the drawer is locked in only one place,
Theft prevention performance and the durability of the locking means can be improved.

In associating the vertical shaft with a spring lever device with the operating rod that is linked to the push-in lock, the lever of the spring lever provided on the vertical shaft is provided with a downward engaging portion, and the operating rod is provided with the downward engaging portion. By forming an upward engaging part that engages and disengages the joint part, and by forming a cam part in the locking piece, the vertical shaft can be directly rotated by the operating rod, so it is simply By making the operation rod into a simple shape such as by bending it, the double drawer prevention device and the all-lock device can be used in common, and the structure with the cabinet can be made extremely simple. Further, even in the all-locked state, the spring lever device maintains the locked state, so the drawer can be reliably locked.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway right side view of the cabinet, FIG. - A plan view of the main part with a line partially cut away, Fig. 4 is a plan view of the main part showing the relationship between the rear part of the drawer and the locking piece of the vertical axis, Fig. 5 is an operational view when the drawer is in the locked state, Fig. 6 The figure is a side view showing the relationship between the rear part of the drawer and the locking piece shown in the - line view of FIG. 4. 1... Cabinet body, 5... Drawer, 7...
Push-in lock, 12... Vertical shaft, 13... Locking piece, 1
4... Notch locking part, 15... Stopper part, 16
... Inclined part, 17 ... First engaging part, 18 ... Second
Engaging portion, 21... Spring lever device, 23... Lever, 26... First spring, 32... Upward engaging portion,
27...Second spring, 28...Operation rod, 34...Downward engaging portion, 35...Third spring, 9...Back and forth moving rod, 33...Cam portion.

Claims (1)

[Scope of utility model registration request] In a multi-stage drawer type cabinet in which a plurality of drawers are installed in a multi-tiered manner in a cabinet main body, a vertical shaft is pivotally supported within the cabinet main body at a position approximately in the center in the left-right direction, and the vertical shaft is One end of the lever protruding from the drawer is engaged with the other end of a spring that is engaged with the cabinet body on the opposite side of the lever across the vertical shaft, and the rear end of each drawer is engaged with the other end of a spring that is engaged with the cabinet body on the opposite side of the lever across the vertical shaft. On the other hand, a locking piece is fixed to the vertical shaft at each position of each drawer, and each locking piece is provided with a locking piece that is attached to the drawer at the push-in position as the locking piece rotates in one direction. A notched locking portion is formed to engage with the first engaging portion, and the locking piece is rotated in the disengagement direction by the first engaging portion by the pushing movement of the drawer. At the rear end of each drawer, the locking piece is configured to rotate in a direction in which the notch locking portion thereof engages with the first engaging portion as the drawer is pulled out. A second engaging portion is provided, and an operating rod is provided in the cabinet main body that is linked to locking and unlocking operations of a push-in lock provided on the front surface of the cabinet main body or the front plate of the one drawer, and the lever is provided with a downward engaging portion, and the operating rod is provided with an upward engaging portion that can be engaged with and disengaged from the downward engaging portion, and a cam portion that comes into contact with a roller provided on the cabinet body, and the roller and the cam When the push-in lock is locked, the upward engaging part engages the downward engaging part to rotate the vertical shaft in one direction, while in the unlocked state, the upward engaging part engages with the downward engaging part and rotates the vertical shaft in one direction. 1. A locking device for a multi-stage drawer type cabinet, characterized in that the locking device is configured such that the engagement between the engaging portion and the downward engaging portion is released.