JPS6237480Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a top plate holding device that has a simple structure and holds the top plate horizontally in a folding table used as a conference table, dining table, or ping pong table.

Conventionally, as a holding device for this type of top plate, as shown in FIG.
The main landing gear 3' is located slightly inward (to the left) of the center.
The upper end is pivoted, and the upper end of the secondary leg 4' is pivoted to the outer end (right end), and an inverted F-shaped guide elongated hole 7' is bored between these pivot points. A pin 5a' at the upper end of the first support rod 5' whose lower end is pivoted to the main leg 3' and a pin 6a at the upper end of the second support rod 6' whose lower end is pivoted to the secondary leg 4' are in the elongated hole 7'. ' are slidably engaged, and when the top plate 1' is deployed, the pin 5a' of the first support rod 5' pushes the pin 6a' of the second support rod 6' to open the secondary leg 4'. Finally, the pin 6a' of the second support rod 6' enters the bent end of the guide slot 7' to hold the top plate 1' horizontally.

By the way, in this case, the guide elongated hole 7' must be bored in the elongated crosspiece 2', and the machining is surprisingly troublesome. 7' and pin 5
The abrasion of the engagement portions with a' and 6a' is severe, causing backlash and making it unstable to hold the top plate 1'.

Therefore, this invention attempts to solve the above drawbacks by a simple structure without providing troublesome long holes in the long and narrow crosspieces. In a foldable table, the upper end of the leg rod is rotatably attached to a position closer to one side than the center of the crosspiece via a bearing material,
One end of a short interlocking rod is pivotally attached to each of the above-mentioned bars on the other side of the leg rod, and the other end of each interlocking rod is arranged so that the interlocking rod faces the other side when the top plate is unfolded. The upper end of each support rod is rotatably connected to the upper end of each support rod, and the lower end of each support rod is rotatably attached to the center of the front and rear leg rods. The top plate is held horizontally by tilting the top end of the support rod to the bottom surface of the top plate (in the example, the crosspiece is in an inverted L shape, so the bottom surface of the horizontal piece of this crosspiece). It is characterized by what it did.

Figures 1 to 3 show an embodiment of this invention, in which 1 is a top plate, and a pair of bars 2 made of angle materials are attached in parallel to the front and rear sides of the bottom surface of the top plate. , At a position slightly closer to one side (toward the left side in the figure) than the center of these crosspieces 2, there is the upper end of a leg lever 3 with a pair of casters 3a (which may not be a table for meetings or meals) at the lower end. These leg rods 3 have one end 4a of a short interlocking rod 4 on the other side (right side) of the pivot point of each leg rod 3. These interlocking rods 4 are rotatably mounted, and these interlocking rods 4 are connected to the top plate 1.
In the unfolded state as shown in Figures 1 and 2, the crosspiece 2
The upper ends 5b of support rods 5 are connected to the other end 4b of each interlocking rod 4 so as to be rotatable in a crank shape, and each support rod 5 is connected to the top plate. 1 extends diagonally downward and inward in the unfolded state, and their lower ends 5a are rotatably attached to the center height position of the leg rod 3.

As shown in FIGS. 1 and 2, each support rod is arranged so that the interlocking rod 4 is along the crosspiece 2 on the bottom surface of the top plate 1 and the support rod 5 is tilted diagonally upward and outward from the leg rod 3. The upper end of the support rod 5 comes into contact with the lower surface of the horizontal piece of the crosspiece 2 (the crosspiece 2 does not necessarily have to be an angle material, in which case the lower surface of the top plate 1), and the support rod 5 plays the role of a brace. After all, the top plate 1 is firmly held in a horizontal state.

In this horizontal unfolded state, if you lift the outer end of the top plate 1 or push down the inner end, the top plate 1 will rotate about the bearing material 3b of the leg rod 3 as a fulcrum as shown in Fig. 3A. Accordingly, the support rod 5 rotates around the lower end 5a, and the interlocking rod 4 rotates toward the leg rod 3 around the one end 4a connected to the crosspiece 2, and the top plate is rotated as shown in FIG. 1 is in an upright state, it is folded into a compact form almost in contact with the crosspiece 2 on the bottom surface of the top plate.

On the other hand, if the top plate 1 is rotated in the opposite direction to the above in this folded state, the support rod 5 and the interlocking rod 4 will be rotated away from the leg rods 3 as the top plate 1 is rotated, and the top plate 1 will be in a horizontal state. Then, as mentioned above, the interlocking rod 4 follows the crosspiece 2 on the bottom surface of the top plate, and the support rod 5 tilts diagonally upward and outward, so that the upper end of the support rod 5 and the lower surface of the horizontal piece of the crosspiece 2 come into contact. Therefore, hold the top plate 1.

FIGS. 4 and 5 show that the one end 4a of the interlocking rod 4 or the lower end 5a of the support rod 5 is pivotally supported by the crosspiece 2 or the leg rod 3 and connected to each other in a crank shape, as described above. A pair of top plates 1, which are held horizontally by interlocking rods 4 and support rods 5, are arranged with their leg rod side ends facing each other, and their leg rod side ends are shaped like an inverted π-shape. A pair of main arms 12 that intersect with the connecting rod 11 in an F-shape and are pivoted to the inverted π-shaped connecting rod 11 at the middle portion, and left and right secondary arms 13 connecting the lower ends of each main arm 12 and the crosspiece 2. The top plate 1 is connected by a hinge member 10 consisting of a , 1 are applied to a table tennis table that is made to stand up parallel to each other and can be folded.

In addition, FIG. 6 shows that the upper end 5b of the support rod 5 is connected to the top plate 1.
is bent upward in the unfolded state, a screw rod 6a is attached to the end thereof, an adjustment piece 6 is screwed onto this, the upper surface of this adjustment piece 6 is brought into contact with the lower surface of the horizontal piece of the crosspiece 2, and the adjustment piece is bent upward. This shows an example of a modification in which the angle when the top plate 1 is unfolded can be finely adjusted by rotating the top plate 6 appropriately.
It is suitable for table tennis tables that require levelness of .

As described above, in this invention, as a foldable table, one end of the interlocking rod, which is shorter than the leg rod, is pivotally connected to the front and rear crosspieces on the underside of the table, respectively,
The interlocking rods are arranged so as to face the other side when the top plate is unfolded, and the upper ends of the support rods are rotatably connected to the other end of each interlocking rod, and the lower ends of each support rod are connected to the front and rear sides. It is rotatably attached to the center of the leg rod, and when the top plate is unfolded, each support rod is tilted upward and outward to hold the top plate, so it does not depend on the conventional engagement relationship between the guide elongated hole and the pin. Compared to the original, the top plate is held in a stable state without wobbling due to wear even after long-term use, and there is no need to perform the troublesome work of providing guide slots in the long and thin crosspieces. , it has the advantage of not requiring secondary legs and can be assembled compactly with a small number of components.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment of this invention. Figure 2 is its front view. Figure 3 A is a front view while folding.
Figure 3B is a front view of the folded state. Fig. 4 is a front view when applied to a table tennis table connected with a hinge. Figure 5 is a front view of the folding process. FIG. 6 is a front view of a part of the modified example. FIG. 7 is a front view of a conventional folding table. In the diagram, 1... Top plate, 2... Crosspiece, 3... Leg rod, 3
b...Bearing material, 4...Interlocking rod, 4a...One end,
4b...other end, 5...support rod, 5a...lower end, 5b...upper end, 10...hinge member.

Claims (1)

[Scope of utility model registration request] A crosspiece 2 is arranged in parallel at the front and rear positions of the lower surface of the top plate 1, and the upper end of a leg rod 3 is rotatably attached to a position closer to one side than the center of the crosspiece 2 via a bearing member 3b, In the foldable table, each crosspiece 2 has one end 4 of an interlocking rod 4 that is shorter than the leg rod 3 on the other side.
a are pivotally attached to each other, and the interlocking rods 4 are made to face the other side when the top plate 1 is expanded, and the upper ends 5b of the support rods 5 are rotatable to the other end 4b of each interlocking rod 4. The lower end portion 5a of each support rod 5 is rotatably attached to the center of the front and rear leg rods 3, and when the top plate 1 is expanded, each support rod 5 is tilted diagonally upward and outward. A device for holding a top plate in a folding table, characterized in that the top plate 1 is held horizontally by bringing the upper end into contact with the lower surface of the top plate 1.