JPH042579Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mobile desk that can be easily moved by projecting casters downward when necessary.

[Prior Art] There is a mobile desk that has casters attached to the legs of the table and can be easily moved.Although this type of mobile desk is equipped with brakes on the casters, even if the brakes are applied to the casters, the There was some wobbling, which made it uncomfortable when doing small tasks such as writing on the desk.

[Problems to be solved by the invention] Therefore, Japanese Utility Model Publication No. 53-31842 proposes a movable table in which casters are attached to the lower part of the legs of a desk so that they can protrude downward by means of a link mechanism. However, this type of table with casters that can protrude downward requires the user to bend their body to operate the links provided at the bottom of the legs, and also to move the links of each of the four casters. There was a problem in that it had to be put in and taken out, making the operation complicated.

The present invention was made to solve the above problems, and allows the casters to be put in and taken out by simply rotating the shelf or top of the desk.
It is an object of the present invention to provide a mobile desk that can be used by easily switching the desk to a movable state or a stable stationary state.

[Means for Solving the Problems] To this end, the mobile desk of the present invention includes support legs, casters attached to the front and rear lower portions, and casters disposed in the lower portions of the support legs so as to be movable up and down. and a connecting means disposed within the vertical portion of the support leg so as to be movable up and down;
A shelf board or a top plate is rotatably supported on both sides by the vertical part of the support leg, and is linked to the connecting means so as to move the connecting means up and down as the support leg rotates. configured.

[Function] In the mobile desk configured in this way, when the shelf board or the top board is rotated, for example, from a vertical position to a horizontal use state, this movement moves the connecting means upward or downward,
The casters rise while moving in parallel, and as a result, all the casters rise above the lower end positions of the support legs, and the adjusters of the support legs touch the floor, bringing the desk into a stable stationary state. On the other hand, when moving the desk, the shelf or top plate is rotated, for example, from a horizontal position to a vertical position. This movement moves the coupling means upwards or downwards, and the casters descend in translation, so that all the casters project below the adjusters of the support legs, and the desk is supported by the casters;
It becomes movable.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a left side view of the mobile desk. This desk has inverted T-shaped support legs 1 on both sides, on which a top plate 2 is fixed horizontally, and a shelf 3 slightly below the top plate 2.
is pivotally connected to the support legs 1 on both sides so as to be able to rotate up and down, and the caster 4 is made to protrude downward from the bottom of the support legs 1 in response to the rotation of the shelf board 3.

That is, the support legs 1 arranged on both sides of the desk have a horizontal lower part 1a and a vertical part 1 fixed vertically thereon.
A height-adjustable adjuster 5 is attached to the front and back of the bottom of the horizontal lower portion 1a. Second
As shown in Fig. 3, there are three caster frames 6 with casters 4 attached to the front and rear lower parts in the horizontal lower part 1a.
When the caster frame 6 is located at the lowest position, the caster 4 at the bottom is lowered below the adjuster at the horizontal lower part 1a. Parallel link 7 is pin 7a
The caster frame 6 is connected to the horizontal lower part 1a by the pin 7b, and the central parallel link 8 is connected by the pin 8a.
The caster frame 6 is connected to the horizontal lower part 1a by the pin 8b.

On the other hand, a U-shaped guide member 9 is fixed in the vertical part 1b of the support leg 1 near the position of the shelf board 3, and a connecting rod 10 as a connecting means is inserted into holes provided at the upper and lower parts of the guide member 9. is inserted vertically, and the connecting rod 10
is supported by this guide member 9 so that it can move up and down. There is a long hole 9a in the vertical direction approximately in the center of the guide member 9.
A circular hole 9b is provided near one side, and the tip of a pin 11 fixed to the connecting rod 10 at a fixed position is fitted into the elongated hole 9a.

A cam 12 is further rotatably mounted within the guide member 9 by fitting its cylindrical end into the circular hole 9b. The cam 12 is formed by providing an oblique elongated hole 12a in a part of a rectangular plate, and fixing the cam 12 through a cylinder 12b in a part. The square plate of the cam 12 is inserted between the connecting rod 10 and the guide member 9, and the pin 11 protruding from the fixed position of the connecting rod 10 is fitted into the elongated hole 12a of the cam 12 and the elongated hole 9a of the guide member 9. inserted. The cam 12 rotates around the cylindrical end fitted into the circular hole 9b of the guide member 9, that is, it rotates within a range of about 90 degrees from the state shown in FIG. 4 to the state shown in FIG. As the connecting rod 10 rotates, the pin 11 fixed in its fixed position is guided by the longitudinal long hole 9a, and the cam 12
It is moved by the elongated hole 12a, and moves up and down by a certain length.

On the other hand, the lower end of the connecting rod 10, which is supported by the guide member 9 to be able to move up and down and which moves up and down over a fixed length by the rotation of the cam 12, is inserted into the horizontal lower part 1a and connected to the tip of the parallel link 8 mentioned above. be done. As a result, for example, when the cam 12 rotates approximately 90 degrees clockwise from the state shown in FIG. , caster frame 1a
moves to the left in Figure 2 and descends to the lowest position.

The support leg 1, caster frame 6, connecting rod 10, guide member 9, cam 12, etc. configured in this way are arranged in a symmetrical manner on both the left and right sides of the mobile desk. The board 2 is fixed horizontally. In addition, there are support rods 3 on both sides below the top plate 2.
A shelf board 3 having a protruding portion a is attached so that its support rods 3a are fitted into the cylinders 12b of the cams 12 in the support legs 1 on both sides. The shelf board 3 is arranged so that when the cam 12 rotates downward as shown in FIG. 2, it is in the horizontal use state, and when the cam 12 rotates upward as shown in FIG. 4, it is in the vertical storage state. It is pivotally attached to the cylinder 12b of the cam 12.

Next, the operation of the mobile desk configured as described above will be explained.

As shown in Figure 2, when the desk is in use, the shelf board 3 is moved downward approximately 90 degrees from the horizontal position to the vertical position.
When rotated, the cam 12 rotates upward about 90 degrees around the cylinder 12b. At this time, the connecting rod 10 is raised by a certain length due to the elongated hole 12a of the cam 12 and the pin 11 that engages with it, and as the connecting rod 10 rises, the parallel link 8 is rotated around the pin 8b. Rotate approximately 90 degrees clockwise. At this time, caster frame 6
is lowered while moving rearward due to the action of the front and rear parallel links 7, and with the caster frame 6 lowered to the lowest position, the caster 4 at the bottom of the caster frame protrudes below the adjuster 5, and the four casters 4 is grounded on the floor, and the entire desk is lifted up (4th
figure). This state is when the desk is not in use,
The desk can be easily moved to any location using casters 4.

On the other hand, when using the desk, the shelf board 3 that has been laid down vertically is rotated so as to be pulled up to the horizontal position (FIG. 2). At this time, the cam 12 is connected to the cylinder 12.
The connecting rod 10 is rotated approximately 90 degrees downward about b as an axis, and the connecting rod 10 is lowered by a certain length by the elongated hole 12a of the cam 12 and the pin 11 that engages with the elongated hole 12a of the cam 12. As the connecting rod 10 descends, the parallel link 8 rotates about 90 degrees counterclockwise about the pin 8b, and as a result, the caster frame 6 moves forward due to the action of the front and rear parallel links 7. It rises while moving to. As a result, the caster frame 6 completely enters the horizontal lower part 1a of the support leg,
The caster 4 rises above the adjuster 5, all adjusters 5 are grounded, and the desk is stably supported by the four adjusters 5 (the second
figure).

In this way, by simply rotating the shelf board 3 of the desk, the caster 4 can be made to protrude downward to make it movable, or the caster 4 can be raised to ground the adjuster 5 on the floor for stable use of the desk. It can be a state.

In the above embodiment, the caster was put in and taken out by rotating the shelf board, but by pivotably attaching the top plate to both support legs and rotating the top plate like the shelf board above, It is also possible to have a structure in which the casters can be taken in and out.

[Effects of the Invention] As explained above, the mobile desk of the present invention includes support legs, casters attached to the front and rear lower portions, and casters disposed in the lower portions of the support legs so as to be movable up and down. , a connecting means disposed within the vertical part of the support leg so as to be movable up and down, and both sides of the support leg rotatably pivoted on the vertical part of the support leg, and the connecting means can be moved up and down as the support leg rotates. a shelf board or a top board linked to the connecting means so as to Therefore, by simply rotating the shelf board or the top board vertically, for example, the casters can be made to protrude below the support legs, making it possible to easily move the desk. Further, by simply rotating the shelf board or the top board horizontally, for example, the caster can be lifted up and the adjuster at the bottom of the support leg can be grounded on the floor, making it possible to put the desk into a stable state of use.

Therefore, if this idea is applied to a table used in a gathering place, etc., where the top plates are placed vertically and stored in multiple stacks, it can be moved and stored with just one movement, making it extremely labor-saving. It is highly effective and
Since the azimuth star is connected at the same time as the top plate is leveled, there is no risk of the top plate being accidentally moved or falling over even if a person is on top of the top plate, resulting in excellent safety.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a left side view of the mobile desk, Fig. 2 is an enlarged sectional view of its supporting legs, Fig. 3 is an exploded perspective view of the supporting legs, and Fig. 4 is a shelf board. An enlarged cross-sectional view of the state in which the caster is lowered by turning it vertically,
FIG. 5 is a central vertical sectional view of FIG. 4. 1... Support leg, 1a... Horizontal lower part, 1b... Vertical part, 2... Top plate, 3... Shelf board, 4... Caster, 6... Caster frame, 7... Parallel link, 10
...Connecting rod.

Claims (1)

[Scope of Claim for Utility Model Registration] A support leg, a caster attached to the front and rear lower portions, a caster disposed within the lower part of the support leg so as to be movable up and down, and a caster movable up and down within the vertical portion of the support leg. a shelf board whose both sides are rotatably pivoted to the vertical part of the support leg, and which is linked to the connecting means so as to move the connecting means up and down as the support leg rotates; A mobile desk characterized by comprising: or a top plate;