JPH0748097Y2 - Folding table - Google Patents

Description

[Detailed description of the device] [Industrial applications]

In this invention, a top plate is pivotally attached to the upper part of a pair of left and right supporting legs standing on a foot stand, and the top plate is in a vertical position along the supporting legs and in a deployed position where it is in a horizontal position. The invention relates to an improvement of a height-adjustable folding table having a folding device which is displaceable to the outside and which is locked in the deployed position.

[Prior art]

Conventionally, various configurations of a single folding type folding table in which the top plate is locked in the unfolded position have been proposed, but all of them have a complicated structure and a large folding rotation path of the top plate, There is a drawback that the legs cannot be folded unless the length of the supporting leg is long, that is, it is not high. Especially for infant tables, there has been a demand for a folding table that has a wide top plate and a height suitable for infants, and is safe when folding and the height can be adjusted. Such products have not been developed.

[Problems to be solved by the device]

This invention was created in view of the above circumstances,
Its main problem is a folding table that can be folded at the center, but can be safely folded and the height of the top plate can be adjusted up and down, which is suitable for infants. To provide.

[Means for solving problems]

In order to solve the above problems, the present invention has the following problems. (A) A top plate is pivotally attached to the upper part of a pair of left and right support legs standing on a foot stand, and the top plate is placed in a vertical posture along the support legs. Has a folding device that can be displaced between the folding position and the unfolding position in the horizontal position and is locked in the unfolding position, and is a single-folding folding type that is folded at approximately the center in the front-back direction of the top plate. A table, (b) a folding device is fixed to a height-adjustable support leg, and a bracket protruding in one of the front and rear directions is provided with a pivot to pivotally attach a side portion of the top plate, (c) A lock pin is provided on the top plate side, and a lock groove into which the pin fits when the top plate is developed is formed on the upper surface of the bracket, and (d) a lock fitted to the lock groove on the bracket. The actuating plate that covers the upper opening of the locking groove is biased in the restraining direction so as to restrain the pin from above, and is pivotally attached. Is located at the position where the bottom part of the top plate when folded is displaced from the center part in the front-back direction of the top plate by the protruding amount of the bracket, and (e) the upper end of the operating plate is moved when the top plate is unfolded. Is formed on a guide surface that drives the actuating plate in a direction away from the engaging groove by abutment with the engaging pin, and (f) is connected to the operating plate so as to be interlockable and is pivotally attached to the bracket coaxially with the operating plate. (G) the folding device is provided symmetrically on each of the left and right supporting legs, (h) the operating plate is provided inside the bracket and the operating lever is provided outside the bracket, and (i) ) A long hole is bored in the bracket to connect the operating plate and the operating lever so as to be interlockable with each other, and the connecting shaft is formed coaxially with the connecting shaft of the operating plate and the operating lever on the opposite side. , Is taking technical measures.

[Action]

When the top plate rotates in the unfolding direction from the vertical folding position with the pivot provided on the bracket as the fulcrum, the locking pin abuts the guide surface of the operating plate, and the moving of the locking pin causes the operating plate to move to the bracket. It rotates in the anti-restraint direction against the urging force around the pivot point of. This opens the upper opening of the locking groove of the bracket, so that the locking pin can fit in the locking groove. Since the locking pin no longer collides with the guide surface of the operating plate due to the depression, the operating plate automatically returns to the closed position that closes the upper opening of the locking groove by the biasing force and restrains the locking pin. The top plate is locked in the deployed position. Next, in the folding position, by moving the operation lever, the operating plate rotates in the anti-restriction direction against the biasing force to open the upper opening of the locking groove. Then, when the top plate is rotated in the folding direction, the locking pin is released from the locking groove, and the top plate is rotated to be displaced to the folding position in the vertical posture. Further, the height of the top plate can be adjusted by expanding and contracting the supporting leg portion and fixing it at a predetermined height. Also, the pivot part is displaced from the central part in the front-back direction of the top plate by the protrusion of the bracket, and the lower part of the top plate when folded is located at a position shorter than the upper part. When rotating the top plate, the lower part of the top plate is shorter than the upper part of the top plate by the protrusion of the bracket, so the weight of the lower part of the top plate is lighter than that of the upper part of the top plate. In addition, the top plate does not rotate naturally, and the top plate can be rotated by hand or gently. Furthermore, since the bracket is provided with a long hole and the operating plate and the operating lever are linked so as to be interlockable with the connecting shaft, the guide function of the long hole allows the top plate to rotate more smoothly when folded. .

【Example】

A preferred embodiment of the folding table according to the present invention will be described below with reference to the drawings. In the folding table 1 shown in FIGS. 1 and 2, a supporting leg portion 3 is erected at the center of a pair of left and right footrests 2, and each supporting leg portion 3
The left and right sides of the top plate 5 are pivotally attached to the upper part of each of them via the folding device 4. This folding device 4 is fixed to a horizontal bridge piece 31 which is horizontally spanned between the inner pipes 32 of a pair of supporting legs 3 facing each other and is fixed to the end portion toward the end plate support frame 51 with a pivot P1. A bracket 6 pivotally mounted via the bracket 6, an actuating plate 7 pivotally mounted inside the bracket 6 via a pivot P2, and an outer side of the bracket 6 coaxially pivoted to the pivot P2 to interlock with the actuating plate 7. It is composed of an operating lever 8. That is, the bracket 6 projects in one of the front and rear directions from the supporting leg portion 3 so as to be more clearly shown in FIG. 3, and the pivot P1 for pivotally attaching the top plate supporting frame 51 for supporting the top plate 5 is more than the supporting leg portion 3. It is set in a position that is offset. The upper end surface 6'of the bracket 6 is set to a horizontal plane for horizontally supporting the top plate 5 to the top plate support frame 51, and the upper part of the upper end surface 6'is opened at a position close to the supporting leg portion 3 U A locking groove 61 having a shape is formed. Further, a stopper pin 64, which serves as a stopper when the top plate is folded, is projected outward at an intermediate position of the bracket 6. On the other hand, a locking pin 52 that can be fitted into the locking groove 61 when the top plate 5 is deployed is projected inward at a position of the top plate support frame 51 that is a predetermined distance from the pivot P1 position. An operating plate 7 is attached to the inside of the bracket 6 and an operating lever 8 is attached to the outside thereof by the same pivot P2. As shown in FIGS. 3 and 4, the operating plate 7 has an upper end formed on a guide surface 71 inclined downward in the direction of the engaging groove 61. An arcuate receiving portion 72 for receiving the upper portion is formed, extends downward, and is pivotally attached to the pivot P2. A connecting shaft 9 extending in the horizontal direction is fixed between the pivot position and the receiving portion 72. On the other hand, as shown in FIGS. 3 and 5, the operation lever 8 has an upper portion integrally connected to the end portion of the connecting shaft 9, and is pivotally attached to the bracket 6 by the pivot P2 at a midway position, and the lower portion is It is twisted at a right angle to form a grip portion 81 for a finger hanging operation. Here, the connecting shaft 9 that connects the operating plate 7 and the operating lever 8 penetrates a long hole 62 bored at an intermediate position of the bracket 6. This long hole 62 is used when the operating plate 7 is displaced from the closed position where the operating plate 7 covers the locking groove 61 to the open position where the locking groove 61 is opened and the locking pin 52 is moved in and out when the operating lever 8 is operated with the pivot P2 as a fulcrum. Is formed along the locus of the connecting shaft 9. The operating plate 7 is biased by the spring S in the direction to cover the locking groove 61, and the connecting shaft 9 is restrained at the tip of the elongated hole 62, so that the operating plate 7 closes the locking groove 61. Is set to. In addition, in the present embodiment, the connecting shaft 9 not only connects the operating plate 7 and the operating lever 8 of the one folding device 4, but also the operating plate 7 and the operating lever provided on the opposing folding device 4 (not shown). It is also made of one bar so that 8 can be connected coaxially. Therefore, both operating plates 7 can be operated simultaneously by operating either one of the operating levers 8. Next, the supporting leg portion 3 has a double pipe structure as shown in FIGS. 1 and 2, and the upper inner pipe 32 provided with the folding device 4 is provided.
A large number of screw holes 34 for height adjustment are provided on the side, and a reference screw hole 35 is provided on the side of the outer pipe 33 fixed to the foot stand 2,
It has a height adjusting structure in which the screw holes 34 of 32 selected heights and the reference screw hole 35 are aligned and screwed with a fixed handle 36 having a screw shaft at the tip. Further, the leg base 2 has casters 22 attached to the front and rear ends thereof, and the caster attachment portion 21 is bent and raised so that the center side for fixing the support leg portion 3 extends horizontally at a low position. Has become. With the above-mentioned configuration, when the top plate support frame 51 is rotated in the unfolding direction (direction a in the figure) from the folding position in the vertical posture shown in FIG. The stop pin 52 abuts on the guide surface 71 of the operating plate 7, and the movement of the locking pin 52 causes the operating plate 7 to move to the bracket 6
It rotates in the anti-restraint direction (direction b in FIG. 4) against the urging force of the spring S with the position of the pivot P2 as the fulcrum. At this time, the operating plates 7 of the pair of folding devices facing each other are interlocked via the interlocking shaft 9. As a result, the upper opening of the locking groove 61 of the bracket 6 is opened, so that the locking pin 52 fits into the locking groove 61 and becomes the expanded position of FIG. Since the guide surface 71 of the operating plate 7 does not collide with the engaging pin 52 due to the depression of the engaging pin 52, the operating plate 7 is automatically returned to the closed position that covers the upper opening of the engaging groove 61 by the urging force.
Since the receiving portion 72 restrains the upper portion of the locking pin 52, the top plate 5 is locked at the expanded position. Next, in the folding position, by moving the operating lever 8 in the direction c shown in FIG. 5, the respective actuating plates 7 of the folding device 4 facing each other via the connecting shaft 9 are simultaneously subjected to the urging force of the spring S. In reverse, it rotates in the anti-restraint direction (b direction) to open the upper opening of the locking groove 61. Then, when the top plate 5 is rotated in the folding direction (the d direction in the first drawing), the locking pin 52 is released from the locking groove 61, and the top plate 5 is rotated to fold the vertical posture shown in FIG. Move to the tatami position. At this time, the lower end of the top plate supporting frame 51 rotating in the folding direction abuts the stopper pin 64 provided on the bracket 6 and is regulated in a vertical posture. Further, as shown in FIG. 1, the supporting leg portion 3 moves up and down the inner pipe 32 to align the screw holes 34 and 35 at a desired height position and fix the fixed handle.
Height can be adjusted by screwing with 36. The position of the pivot P1 that pivotally attaches the top plate support frame 51 and the bracket 6 is displaced from the center of the top plate by the amount of protrusion of the bracket 6, and is set at a position where the lower side when folded is shortened. Therefore, the height of the supporting leg portion 3 required for folding may be a length that can hold the lower side of the top plate. In the present embodiment, since the center side of the foot stand 2 is set lower than the caster mounting portion 21, the top plate 5 can be foldably supported at a lower position.

[Effect of device]

Since the present invention has the above-mentioned structure, it is possible to perform a single-folding-type folding with a simple structure, and the height of the top plate can be set low, which is particularly useful as a table for infants. In addition, it is easy to store when the table is not used, and space can be saved. Further, the weight of the lower portion of the top plate is lighter than that of the upper portion of the top plate, so that even if the lock is released, the top plate will not rotate naturally unless it is turned by hand, and Even when the tabletop is manually rotated, the tabletop can be gently rotated. Therefore, even when the lock is released by the operation lever or the lock is accidentally released, it is difficult to pinch the hand or the like. Further, the guide function of the elongated hole formed in the bracket allows the top plate to rotate more smoothly when folded. Moreover, since the height of the supporting leg can be effectively adjusted, the table can be used as an optimal height according to the user.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a developed position of a folding table according to the present invention, FIG. 2 is a side view showing a folding position, and FIG. 3 is a side view showing a folding device. FIG. 4 is a side view of the folding device as viewed from the inside (back side), and FIG. 5 is a side view showing the relationship between the operating plate and the operating lever without showing the bracket. 1 …… Folding table 2 …… Foot stand 3 …… Supporting legs 4 …… Folding device 5 …… Top plate 6 …… Bracket 7 …… Operating plate 8 …… Operating lever 9 …… Connecting shaft 52 …… Stop pin 61 …… Locking groove 62 …… Long hole 71 …… Guide surface

Claims (1)

[Scope of utility model registration request] 1. A top plate is pivotally attached to the upper part of a pair of left and right support legs standing on a foot stand, and the top plate is in a vertical position and a horizontal position along the support legs. A folding table with a folding device that is displaceable to the deployed position and locked at the deployed position and that is folded at approximately the center in the front-rear direction of the top plate has a high folding device. A bracket that is fixed to the adjustable support leg and projects in one of the front and rear directions is provided with a pivot to pivotally attach the side of the top plate, and a locking pin is provided on the top plate side. A locking groove into which the pin fits is formed on the upper surface of the bracket, and an operating plate that covers the upper opening of the locking groove is constrained so that the locking pin fitted in the locking groove is constrained from above in the bracket. It is urged in the direction of the top and pivotally attached. , The top plate lower part when folded is provided at a position shorter than the top part, and the top end of the operating plate is separated from the locking groove by abutment with a locking pin that moves when the top plate is unfolded. Formed on a guide surface to be driven in the direction, and provided on the bracket with an operation lever that is linked to the operation plate and is pivotally mounted coaxially with the operation plate. An operating plate is provided inside the bracket and an operating lever is provided outside the bracket, and a long hole is bored in the bracket to connect the operating plate and the operating lever so as to be interlockable by a connecting shaft; A folding table, wherein the connecting shaft is formed coaxially with the connecting plate of the operating plate and the operating lever on the opposite side.