JPS6032793Y2 - Movable leg structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a movable leg having the ability to prevent falling of an electronic equipment cabinet or the like.

In some cases, it cannot be used in a stationary position in electronic computers, communication equipment testing equipment, etc., and in general, the bottom of the cabinet is often equipped with a flexible ring to make it portable.

In addition, the layout of items that are generally installed and fixed may be changed,
When changing the system configuration, a structure that can be moved is often required.

However, depending on the structure of the device, the height, width, center of gravity, etc. may cause unstable posture when moving with free wheels.

FIG. 1 is a perspective view of an example of a conventional electronic device.

A pedestal 2 larger than the bottom of the device 1 is provided at the bottom of the device, and four adjustable wheels are placed at the four corners of the pedestal 2 to improve the stability of the installation.

However, this structure requires a large area for installation, and also imposes restrictions on area, width, etc. for storage and movement.

Furthermore, even if the structure is stable under normal conditions, there are cases of accidents such as overturning and sliding collisions, especially during disasters such as earthquakes, and further improvements are required in this respect.

FIG. 2 is a perspective view of a portion of the bottom of the device.

A support arm 4 is attached horizontally to the bottom of the device with screws, and a pedestal whose height can be adjusted freely with a screw is provided at the tip of the support arm 4, and the screw is adjusted to match the floor surface.

This method has a disadvantage in that it requires attachment and detachment operations each time the attachment is necessary.

Particularly in the case of movement, the protrusion of the support arm creates a restriction on the passage.

The present invention relates to a movable structure for legs.

That is, a horizontal adjustment table is attached to the bottom of the cabinet, and a free ring having a rotatable vertical axis is provided at the bottom of a support part that is rotatably supported in the horizontal direction on the axis of the horizontal adjustment table. The position of the support part is fixed by a pin protrusion mechanism,
The movable leg structure is characterized by selectively fixing a plurality of leg postures, thereby eliminating the drawbacks of the prior art.

Examples according to the present invention will be described in detail below.

Note that the same numbers in the figures from FIG. 3 to FIG. 6 indicate the same items.

FIG. 3 is a schematic perspective view of the main parts of the movable leg.

A horizontal adjustment stand 11 is attached to the bottom of the cabinet 1' (indicated by the two-dot chain line), and this structure includes a pedestal 12 at the bottom, and the shaft portion 13 can be adjusted by rotating an adjustment screw 14.

An index plate 15 is fixed to the shaft portion 13.

The index plate 15 has a plurality of screws 15a (two screws are shown in the figure).

), and can be fixed to the cabinet 1' with a plurality of bolts 16.

The shaft portion 13 serves as a support column for the horizontal adjustment table 11 and at the same time serves as a rotation axis of the bearing 18 of the support portion 17.

The upper surface of the support part 17 is in contact with the lower surface of the index plate 15, and the bearing 18
and the support portion 17 are bonded and fixed.

Therefore, the support portion 17 is rotatable about the shaft portion 13 as a central axis.

Free wheels 24, 24', which are commercially available products, are attached to the support part 17 at the front and rear ends of the support part.

The free wheel 24 is rotatable about a vertical axis, as is well known, and is provided with a stopper to stop the wheel from rotating.

(Figure omitted) A lever 19 is rotatably attached to the support portion 17 by a shaft 20 at approximately the center.

A pin 21 is fixed to the tip of the lever 19, and this pin 21 loosely fits into a hole 15b provided in the index plate 15.

In the figure, four holes 15b are provided with an angle difference of 45 degrees.

A coil spring 22 is attached to the pin 21 side of the lever 19, and constantly pulls the pin 21 downward via the lever, that is, in a direction in which the pin 21 is pulled out from the index plate 15.

A petal 23 is fixedly attached to the tip of the lever 19.

An L-shaped hole with a step is provided in the tip surface 17a of the support portion 17, the lever 19 is always inserted into the hole 17b, and the pin 21 is lowered and does not enter the hole 15b of the index plate.

The support part 17 is rotated to a predetermined position, and the pin 21 is attached to the index plate 1.
When the pedal 23 matches the hole 15b of 5, the pin 21 is pressed.
enters hole 15b.

At this time, if you push the pedal 23 to the left in the figure, the lever will be pulled against the stepped portion 17c due to the slight play of the lever 19-).
The pin 21 enters the hole 15b of the index plate 15 and is fixed at that position.

On the contrary, when moving the support part 17, push the petal 23 to the right in the figure, and it will come off the stepped part 17c, and the pin 21 will be pulled out from the hole 15b of the index plate 15, and the support part 17 can be moved freely around the shaft part 13. It can be moved to

Figure 4 shows the movable legs explained in Figure 3 in electronic equipment cabinet 1.
'It is a perspective view of a structure in which four pieces are attached to the bottom.

The movable leg 50a shows a posture when stored, the movable leg 50b rotates approximately at a right angle and shows a fixed posture, and the movable leg 50c rotates at an angle of approximately 45° and shows a fixed posture.

The explanatory diagram in FIG. 3 corresponds to the movable leg 50b in FIG. 4.

FIG. 5 is a front view of the movable legs in a retracted position.

In order to properly level the electronic equipment cabinet 1', rotate the screws on the leveling table 11, and adjust the free wheels 24 of the movable legs 50.
24' is shown when raised above the floor and adjusted horizontally.

The figure corresponds to the posture of the movable leg 50a in FIG. 4.

In order to prevent falling, the movable legs 50b or 50c may be placed in a posture, but in this case, the free wheels 24, 24' are adjusted so that they are almost in contact with the floor surface.

FIG. 6 is a top view showing the posture of the movable legs depending on their intended use.

Figure A shows the posture during packaging, transportation, storage, and installation, and all movable legs are stored on the underside of the cabinet 1'.

Figure 0 shows movement and seismic safety posture.

The free wheel has a stopper that stops it from rotating.

The figure shows the attitude when the cabinet 1' is placed against a wall.

Two movable legs are retracted, and two are fixed at almost right angles.

The installation floor space is saved by taking an earthquake-resistant and safe stance.

The second figure shows the posture during movement. The movable legs are fixed in the direction of approximately 450 degrees.

In this case, the distance between the wheel axes is widened, and when the vehicle moves in the direction of the arrow, it becomes stable against inclined surfaces in the direction of movement, and since the eight free wheels are dispersed, it becomes stable against traveling on uneven surfaces.

In addition, the wheels are safer when passing through the constriction compared to Figure 0.

In any position from Figure A to Figure 2, the inner free ring 24 always enters the underside of the cabinet and supports most of the weight of the cabinet, so the free ring 24' is attached to the support part 17.
The moment caused by the load is not received in the horizontal position, and the load movement is supported only in the tilted vibration overturning position.

When moving, the leveling table 11 is loosened and raised, and when in the earthquake-resistant position, the leveling table is lowered and adjusted to support the cabinet loading as much as possible.

As described above, according to the present invention, the legs can be freely changed in posture according to the installation conditions of the electronic equipment cabinet or the conditions of transportation, movement, storage, etc.

Therefore, depending on the conditions, it can be used to save floor space and easily strengthen safety against disasters such as earthquakes.

In this embodiment, two free wheels are attached to one movable leg, but one or more free wheels may be used depending on the conditions, and the conditions should be determined based on function and load economy.

Further, although this embodiment relates to an electronic communication device cabinet, similar effects can be expected even if the present invention is applied to general equipment, fixtures, etc. under similar conditions.

[Brief Description of the Drawings] Fig. 1 is a perspective view of an example of a conventional electronic device, Fig. 2 is a perspective view of an example of the bottom of a conventional device, and Fig. 3 is a schematic diagram of the main parts of a movable leg according to the present invention. FIG. 4 is a perspective view of an electronic equipment cabinet equipped with a movable leg according to the present invention, FIG. 5 is a front view showing the operation of the movable leg and leveling table according to the present invention, and FIG.
The figure is a top view of the postures of the movable legs according to the present invention depending on their usage, and shows various binary postures from A to A. In the figure, 11 is a horizontal adjustment table, 15 is an indexing plate, 17 is a support part, 19 is a lever, 21 is an indexing pin, 22 is a spring, 23 is a petal, and 24 and 24' are free wheels.

Claims (1)

[Scope of utility model registration request] A horizontal adjustment table is attached to the bottom of the cabinet, a support part is rotatably supported horizontally on the axis of the horizontal adjustment table, and a free ring having a rotatable vertical axis is provided on the bottom surface of the support part, and a pin provided on the support part is provided. A movable leg structure, characterized in that the position of the support part is fixed by a protruding mechanism, and a plurality of leg postures are selectively fixed.