JPH09207505A - Cabinet fall prevention structure and caster device - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To realize a caster device capable of enlarging a grounding area and capable of reasonably preventing a cabinet from tipping over, and providing an auxiliary wheel protruding when the cabinet is tilted to effectively prevent the cabinet from tipping over. To realize a structure that can be effectively prevented. A caster device (1) on which a caster roller (11) can slide between a pull-out position and a storage position is attached to a bottom surface of a cabinet in a predetermined arrangement.
The area connecting the ground points of is configured to be enlarged as necessary. Further, an auxiliary wheel 53 is provided on the cabinet falling side to project like a support rod according to the tilt angle of the cabinet, vibration, etc. to prevent the cabinet falling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cabinet fall prevention structure and a caster device.

[0002]

2. Description of the Related Art Conventionally, a cabinet for accommodating an electronic device or the like has a swivel type caster attached to the bottom for its movement.

[0003]

However, in the above-mentioned conventional caster structure, since its mounting position is fixed, it is not sufficient in terms of stability and fall prevention. Therefore, the present invention realizes a rational and economical cabinet fall prevention structure and a caster device capable of safely, reliably, and easily ensuring the stability (prevention of fall) during an earthquake, cabinet movement, or the like. Is the task.

[0004]

In order to solve the above-mentioned problems, in a cabinet fall prevention structure according to the present invention, a caster device on which a caster roller is slidable between a pull-out position and a storage position is provided on a bottom surface of the cabinet. It is characterized in that it is mounted in a disposition and the region connecting the ground points of the caster rollers is enlarged as necessary to prevent the cabinet from falling over.

The caster device according to the present invention is a caster device which can be mounted in a predetermined arrangement on the bottom surface of the cabinet so that the region connecting the grounding points can be enlarged as necessary to prevent the cabinet from falling over. And a caster roller that slides between the pull-out position and the storage position and can be fixed at the pull-out device and the storage position.

Another aspect of the present invention is a cabinet fall-prevention structure, which comprises auxiliary wheels that project like a support rod on the fall side of the cabinet depending on the tilt angle and vibration of the cabinet to prevent the cabinet from falling. Is characterized by.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 are views showing an embodiment of the caster device according to the present invention. The caster device of the present embodiment has a predetermined size on the bottom surface of the cabinet so that the area connecting the ground points can be enlarged as necessary to prevent the cabinet (not shown) that houses electronic devices such as communication devices from falling. A device that can be mounted in a configuration. In short, its feature is to have caster rollers that can slide between a pull-out position and a storage position. This will be described in detail below. The caster device 1 includes a housing 3 that can be attached to the bottom surface of a cabinet and has a substantially C-shaped cross section that opens downward, and a bearing member 7 that holds a metal ball 5 (see FIG. 4). ) Is inserted at four positions on both sides and can slide smoothly back and forth in the longitudinal direction with respect to the housing 3, and a rail 9 having a substantially C-shaped cross-section open to the upper side and two rails 9 for the housing 3. It includes a lock mechanism for releasably locking at a slide position (stored position and deployed position), and a caster roller 11 with a 360-degree turning type stopper attached to the lower surface of the rail 9. The lock mechanism is arranged on the upper surface of the rail 9 and
Base plate 15 that can slide in the same direction as the sliding direction of
And a clothespin-like upper piece member 19 and a lower piece member 21 movably attached to the base plate portion on the caster roller side, with a U-shaped spring plate 17 interposed therebetween, and arranged on the lower surface of the rail 9. And a hook member 27 having one end rotatably supported and the other end biased upward by a torsion spring 25.

The movement of the caster roller 11 when pulling out the caster roller 11 will be briefly described below.
In the state where the caster roller 11 shown in FIG. 1 is stored (retracted), the tip (bifurcated) portion of the L member 31 attached to the inner surface on the tip side of the housing 3 is the upper piece member 19. It is caught on both shoulders and this stored state is retained (locked). Therefore, first, the upper piece member 19 and the lower piece member 21 are sandwiched by fingers or the like and lifted upward as a whole, and slightly pulled out (FIG. 5A). As a result, the locked state is released, that is, the tip end portion of the L member 31 is disengaged from both shoulder portions of the upper piece member 19, and the protruding portion 21a on the lower surface of the lower piece member 21 is in the locking hole 9 of the rail 9.
It goes over a and comes off to the outside. By releasing this lock, the caster roller 11 can be pulled out (see FIG. 5).
(B)). Then, in the state where the caster roller 11 is completely pulled out (FIG. 5 (c)), the hook member 27 is caught by the L member 31 and the storing operation of the caster roller 11 is blocked, that is, the caster roller 11 is It will be locked in the pulled out state (Fig. 5 (c),
(Fig. 6).

Next, when the caster roller 11 is retracted by releasing the locked state, the protruding portion 21a of the lower surface of the lower piece member 21 is caught on the front end of the rail 9 and is not slightly moved in the retracting direction. Slightly lower piece member 21
(And the upper piece member 19) is pushed up in the storing direction while being lifted, so that the projecting portion 21a is engaged with the locking hole 9 of the rail 9.
At the same time, the end of the base plate 15 curved upward in the storage direction abuts and presses the hook member 27 to push it downward. As a result, the hook member 27 is not caught by the L member 31 (FIG. 7). By releasing this lock, the caster roller 11
Can be stored. At the time of storing the caster roller, the tip end portion of the L member 31 of the housing 3 is caught by both shoulder portions of the upper piece member 19 and the pulling-out operation of the caster roller 11 is blocked, that is, the caster roller 11 is stored. It will be locked in that state (Fig. 1).

When the caster device 1 of the present embodiment as described above is used to expand the area (ground area) formed by connecting the ground points of the caster rollers 11 as necessary to prevent the cabinet from tipping over. As the arrangement (arrangement) for mounting on the bottom surface of the cabinet, for example, three types of examples as shown in FIG. 8 (bottom view of cabinet) can be considered. These will be briefly described individually. When it is necessary to improve the stability of the cabinet C _{1 in} the front-rear direction, FIG.
As shown in FIG. 5, the caster device 1 is mounted so as to be deployed (pulled out) in that direction. Also, cabinet C ₂
When it is necessary to improve the stability not only in the front-rear direction but also in the left-right direction, the caster device 1 is mounted so as to be deployed in an X shape as shown in FIG. 8B. Furthermore, if the cabinet C ₃ cannot be mounted as shown in FIGS. 8 (a) and 8 (b) because the bottom area of the cabinet C ₃ is small, FIG.
As shown in FIG. 5, the caster devices 1 are compactly mounted so that they are orthogonal to each other and form a quadrangle. With any of these three types of caster device mounting types, the cabinet grounding area can be easily expanded substantially, so that the cabinets C _{1 to} C ₃ have high stability (fall prevention) when the cabinet is moved. It is optimal when necessary, and when the cabinet is installed, it can be easily returned to the original storage state without any particular inconvenience, which is very practical.

Next, an embodiment of the fall prevention structure according to the present invention will be described with reference to FIGS. The overturn prevention structure 51 of the present embodiment is a mechanism for preventing overturning of a cabinet C accommodating an electronic device such as a communication device. In short, the feature is that the auxiliary wheels 53 are provided on the cabinet falling side like a support rod to prevent the cabinet falling, depending on the tilt angle and vibration of the cabinet C. This will be described in detail below. However, since it is provided symmetrically on both sides of the cabinet on the front side in the cabinet moving direction (FIGS. 9 and 10) and both structures are structurally substantially the same, one side (facing On the right side)
Overlapping description is omitted.

The fall prevention structure 51 of this embodiment has an L-shaped pendulum member 5 having a weight 55 at the lower end of the downwardly extending portion and a hook portion 57 at the tip of the orthogonally extending portion.
9, a support 61, which is attached to the inner bottom surface of the cabinet C and rotatably supports the pendulum member 59, and a roller 63, one end of which is rotatably supported by the support 61 and the other end of which is rotatable 63. An auxiliary wheel 53, a torsion spring 65 for rotationally driving the auxiliary wheel 53 to jump out of the cabinet, and a catch mechanism 69 for catching and holding the jumped auxiliary wheel 53 at its angular position. Consists of

The movement of the fall prevention structure 51 will be briefly described below. In the normal state of the cabinet C, as shown in FIG. 11, the hook portion 5 of the pendulum member 59 is used.
7 engages with the corresponding hole 53a of the auxiliary wheel 53,
Are held vertically. When the cabinet C is tilted due to an earthquake or movement, only the pendulum member 59 remains at that position due to the inertial force.
The hook portion 57 of 9 disengages from the corresponding hole portion 53a of the auxiliary wheel 53, and the auxiliary wheel 53 is swung down toward the front side of the cabinet by the force of the torsion spring 65 (FIG. 12). At this time, the auxiliary wheels 53 (rollers 63) press the covers 71 covering the opening portions on both sides of the front surface of the cabinet to open them in a hinged manner. Then, the rotating auxiliary wheel 53 is
At the same time or slightly before the roller 63 touches the floor, the hooking portion 73 of the catch mechanism 69 causes the auxiliary wheel 5 to move.
It engages with the locking hole 53b on the side surface of No. 3, and acts to prevent the auxiliary wheel 53 from rotating in the reverse direction. As a result, the auxiliary wheel 53 acts on the cabinet falling side like a support rod, and the cabinet falling can be completely suppressed.
In order to release the protruding lock state of the auxiliary wheel 53, a rod-shaped member (not shown) is inserted through a pair of small openings 75 (FIG. 9) provided on the lower portions on both sides of the front surface of the cabinet to hook the catch mechanism 73. After moving the auxiliary wheel 53 to a free state, the auxiliary wheel 53 may be returned to the original vertical position in the cabinet (FIG. 11).

As described above, in the fall prevention structure of this embodiment, when the cabinet tilt angle exceeds the allowable angle during an earthquake or when the cabinet is moved, or when an impact such as an obstacle is applied to the auxiliary wheels, the auxiliary wheels are Can project in a timely manner and effectively prevent the cabinet from toppling over.

[0015]

As described above, according to the present invention, it is possible to provide a reasonable and economical cabinet which can safely, reliably and easily secure the stability (prevention of falling) in the event of an earthquake or movement of the cabinet. A fall prevention structure and a caster device can be realized.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of essential parts of an embodiment of a caster device according to the present invention.

FIG. 2 is a cross-sectional view seen from the right side of FIG.

FIG. 3 is an exploded perspective view of the present caster device.

FIG. 4 is a perspective view of a single bearing member.

FIG. 5 is a diagram for explaining the operation of pulling out the caster roller.

FIG. 6 is a perspective view of the caster device in which the caster rollers are pulled out and locked.

FIG. 7 is a cross-sectional side view of essential parts showing the internal state of the caster device when the lock is released.

FIG. 8 is a diagram showing three examples of the mounting arrangement of the caster device with respect to the bottom of the cabinet.

FIG. 9 is a perspective view showing an operating state of an embodiment of the fall prevention structure according to the present invention.

10 is a cross-sectional side view of a main part of FIG.

FIG. 11 is a perspective view showing a state in which the auxiliary wheel is held in the cabinet.

FIG. 12 is a perspective view showing an intermediate state of an operation in which an auxiliary wheel projects.

FIG. 13 is a perspective view showing a state in which an auxiliary wheel is completely projected.

[Explanation of symbols]

 1 ... Caster device 3 ... Housing 7 ... Bearing member 9 ... Rail 11 ... Caster roller 51 ... Fall prevention structure 53 ... Auxiliary wheel

Front Page Continuation (72) Inventor Kiyoshi Kobayashi 1-21-1 Akebonocho, Tachikawa, Tokyo Within Fujitsu ACS Limited (72) Inventor Juichi Kimura 1-21-1 Akebonocho, Tachikawa-shi, Tokyo FUJITSU ACES Shares In the company

Claims (3)

[Claims] 1. A caster device (1) in which a caster roller (11) can slide between a pull-out position and a storage position.
The structure for preventing the cabinet from tipping is characterized in that the cabinet is attached to the bottom surface of the cabinet in a predetermined arrangement, and the area connecting the ground points of the caster rollers (11) is enlarged as necessary to prevent the cabinet from tipping over. . 2. A caster device (1) which can be mounted in a predetermined arrangement on the bottom surface of a cabinet so that the region connecting the grounding points can be enlarged as necessary to prevent the cabinet from falling over, etc. A caster device, comprising a caster roller (11) that slides between a retracted position and a retracted position, and that can be fixed at the retracted position and the retracted position. 3. A fall prevention of a cabinet characterized by comprising an auxiliary wheel (53) which protrudes like a support rod on the fall side of the cabinet according to a tilt angle or vibration of the cabinet to prevent the fall of the cabinet. Construction.