JPS6236427Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-stage height adjustment device for a table.

In other words, for example, in a school cafeteria, the table can be adjusted in two stages to make it higher or lower for upper and lower grades. To provide a structure that can be stably and reliably supported so that it will not fall down even when it is low or low, and has a robust and simple structure that can be suitably implemented.

Next, the embodiment shown in the drawings will be described.

Figure 1 shows a partially cutaway front view of the table, with two supporting legs 1a and 1b on the left side and two supporting legs 1a and 1b on the right side, making a total of four vertically extending legs. A leg connecting rod 7 is provided between the lower parts of the supporting legs 1a and 1b.
A connecting rod 8 is connected between the centers of the left and right leg connecting rods 7, 7.

On one side, the upper parts of holders 9, 9 are fitted and fixed in the lower parts of both the supporting legs 1a, 1b, respectively, and the engaging pieces 9a, 9 are provided on the inner side of the center of both the holders 9, 9.
a are respectively protruded with their lower surfaces being horizontal surfaces, and the upper parts of both short auxiliary legs 2a, 2b are fitted into the lower inner parts of both holders 9, 9, respectively. , 10, and both ends of a connecting rod 3 are connected and fixed to the middle inside of both auxiliary legs 2a, 2b, and parallel to the auxiliary legs 2a, 2b are provided on both ends of the connecting rod 3. One end side of both elongated ground floor plates 4a, 4b extending long from the upper part is connected and fixed, and round ground floor plates 11, 11 are respectively fixed at two places on the outer surface of both ground floor plates 4a, 4b. Both ends of a connecting rod 5 made of a round pipe are connected and fixed to the other end sides of the ground contact plates 4a and 4b, and auxiliary legs 2 are provided between both ends of the connecting rod 3 and both ends of the leg connecting rod 7.
Tension springs 12, 12 are connected to each other so that when a, 2b goes from a vertical state to a horizontal state, the tension springs 12, 12 move beyond the supporting points on the support shafts 10, 10, respectively.

In addition, the leg connecting rods 7, 7 connecting the left and right supporting legs 1a, 1b are connected by the connecting rod 8 as described above, and the connecting rods 8 have upwardly extending portions near both ends of the connecting rods 8. A support metal 13 is fixedly installed, and the base of an elongated stopper 6 having a hook portion 6a at its tip is rotatably pivoted to the support metal 13 via a support shaft 14. An operating rod 15 is inserted into the tip of the holder 6.

Note that the other lower side of the top plate A is also configured symmetrically to the above configuration in the same manner.

Therefore, when raising the table, as shown in FIGS. 1 to 6, each auxiliary leg 2a,
2b vertically, and with each tension spring 12 passing over the fulcrum on the support shaft 10 and the inner surfaces of the ground plates 4a and 4b joining the leg connecting rod 7, connect the hook portion 6a of the stopper 6 to the connecting rod. 5 is engaged from above, the table becomes higher by the amount that each auxiliary leg 2a, 2b stands up, and in this state, the auxiliary leg 2a, 2b is held so as not to fall by engaging the stopper 6. become.

Further, when lowering the table, when the operating rod 15 is lifted upward with the foot, the stopper 6 is rotated upward as shown by the phantom line in FIG. 6, and the hook portion 6a is disengaged from the connecting rod 5. Next, when you step down on the connecting rod 5 with your foot, the auxiliary legs 2a,
2b rotates around the support shafts 10, 10, the tension springs 12, 12 cross over the support points on the support shafts 10, 10, and the auxiliary legs 2a, 2b hit the engagement pieces 9a, 9a and become horizontal. At this point, the table becomes the state shown in FIGS. 7 to 10, in which each floor-contacting body 11 comes into contact with the floor, and the table becomes lower and is stably supported.

In this way, the present invention has both short auxiliary legs 2a and 2 on the lower end side of the vertically adjacent two supporting legs 1a and 1b.
Auxiliary legs 2a, 2b are attached to both ends of a connecting rod 3 whose upper part is pivoted so that it can rotate from a vertical state to a horizontal state, and whose both ends are connected to both auxiliary legs 2a, 2b.
Both supporting legs 1a are attached to a connecting rod 5, which has one end side of both elongated floor plates 4a, 4b extending longer than the upper part thereof and is connected and fixed thereto, and both ends are connected and fixed to the other end side of both floor plates 4a, 4b. , 1b is configured so that the stoppers 6 on the side between them can be freely engaged and disengaged, so that the table can be adjusted to two levels, high and low, by raising each of the auxiliary legs 2a and 2b or bending them horizontally. In the upright position, the engagement of the stopper 6 provides good support to prevent it from falling down, and in the lowered position, the horizontal long ground contact plates 4a and 4b provide stable support, allowing the connecting rod 5 to be The auxiliary legs 2a, 2b can be easily raised and lowered by operating the auxiliary legs 2a, 2b, and both the auxiliary legs 2a, 2b can be framed to form a sturdy structure, and can be suitably implemented with a simple structure. It has characteristics.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of the table, FIG. 2 is a right side view thereof, FIG. 3 is an enlarged view of a part of FIG. 2, and FIGS. Third
6 shows a partial sectional view along the - line in FIG. 3, and FIGS. 7, 8, 9, and 10 respectively show 4, 5, 6, and 1 are shown, respectively. 1a, 1b... supporting legs, 2a, 2b... auxiliary legs,
3... Connecting rod, 4a, 4b... Floor plate, 5... Connecting rod, 6... Stopper.

Claims (1)

[Scope of utility model registration request] The upper parts of the short auxiliary legs 2a, 2b are pivotally connected to the lower ends of the vertically adjacent supporting legs 1a, 1b so as to be able to rotate from a vertical state to a horizontal state, and a leg connecting rod is provided between the supporting legs 1a, 1b. 7, and the right and left leg connecting rods 7, 7 are connected by a connecting rod 8. On the other hand, the auxiliary legs 2a, 2b are connected by a connecting rod 3, and the connecting rod 3 and the leg connecting rod are connected by a connecting rod 3. Tension springs 12, 12 are interposed between the connecting rod 3 and one end of elongated floor plates 4a, 4b extending upward in parallel with the auxiliary legs 2a, 2b. In addition to connecting and fixing them respectively, the grounding plates 4a,
The table has a structure in which the other end side of 4b is connected to a connecting rod 5 made of a pipe, and furthermore, a stopper 6 is provided at the tip of the connecting rod 8, which has a hook portion 6a that detachably engages with the connecting rod 5. Two-stage height adjustment device.