JPH0247845Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a folding table used as a conference table or the like.

(Prior art) In a conventional folding table, one end of a pair of top plates is mounted on a horizontal pivot shaft with respect to the support legs so that it can be rotated (folded and unfolded) using this pivot as a fixed fulcrum. A link member is provided between the support leg and the support leg. This link member is configured so that its attachment point to the support leg can be moved up and down, and can be fixed at the upper position (in the unfolded state of the top plate) by a locking means. In the unfolded state, the weight of the top plate is supported by this link member, and when folded, the link member is unfixed and moves downward along the support legs, allowing both top plates to move downward using the pivot as a fixed fulcrum. Rotate. Further, when the top plate is unfolded, the top plate is rotated upward by an operation opposite to this.

Therefore, when the top plate is rotated, the weight of the top plate is not supported by the link members, and the operator must support the weight of the top plate, making folding and unfolding operations heavy. Ta.

Incidentally, in order to reduce the burden on the operator, a push-up spring has been used, but the structure is complicated and the cost is high.

(Purpose of the invention) Therefore, the present invention provides a folding table that has a simple structure and can be folded and unfolded easily with little force.

(Structure of the invention) The features of this invention are a pair of top plates,
and support legs that support the top plates, one ends of the top plates are rotatably connected to each other via a horizontal connecting shaft, and the lower ends of the pair of arms are connected to the support legs. The upper end is rotatably connected to both top plates via an upper support shaft and a lower support shaft parallel to the above-mentioned connection axis, and both top plates are supported by the arms, and the weight of the top plate is supported by the above-mentioned upper part. It is folded using the support shaft as a fulcrum and is supported on support legs in an unfoldable state.
A pair of rotatable interlocking links are provided between the arms and the support leg, the ends of which are connected to each other, and the connected ends are movable up and down along the support leg, and the support leg Another aspect of the present invention is a folding table which is provided with locking means for locking and fixing the connecting shaft to the support legs when the top plate is unfolded, and locking means for releasing the locking means from the connecting shaft.

(Example) In the figure, 1 and 1 are a pair of top plates, 2 and 2 are support legs that support the top plates 1 and 1, and in this example,
A table with a so-called horizontal folding configuration in which the top plates 1, 1 are folded in a direction perpendicular to the table length direction (table width direction) is taken as an example. However, the present invention can be similarly applied to a table having a so-called vertical folding structure in which a pair of top plates are folded in the length direction of the table.

Chassis 11, 11 are fixed to the lower surfaces of both top plates 1, 1, and the abutting ends of these chassis 11, 11 are rotatable via a horizontal connecting shaft 12 at both ends of the top plates in the length direction. is connected to.

A pair of left and right arms 3, 3 are provided between the chassis 11, 11 of both the top plates 1, 1 and the support legs 2 at both ends of the top plates connected by the connecting shaft 12. Both arms 3, 3 are attached at their upper ends to the chassis 11, 11 and at their lower ends to the support legs 2 so as to be rotatable around upper and lower support shafts 31, 32 parallel to the connecting shaft 12, respectively. is supported on the support leg 2 so that the weight of the top plate is supported by the arms 3, 3, and can be folded and unfolded using the upper support shafts 31, 31 as fulcrums.

That is, the weight of the top plates 1, 1 is supported by the arms 3, 3 in the unfolded state shown in FIGS.
From this state, it rotates in the folding direction using the upper support shafts 31, 31 as fulcrums. At this time, both arms 3, 3
The lower support shaft 3 is pulled by the connecting shaft 12.
2 and 32 in the directions toward each other. The connecting shaft 12 also supports the rotation of the arms 3, 3 and the upper support shaft 3.
By rotating the top plates 1 and 1 around 1 and 31,
Move vertically upward. In this way, the top plates 1, 1 are
Using the upper support shafts 31, 31 as movable fulcrums, and while supporting the weight of the top plate, it is folded as shown in Fig. 3 through the process shown in Fig. 4. It is then developed as shown in Figures 1 and 2.

In this way, while the top plates 1, 1 are rotating, the weight of the top plate is supported by the arms 3, 3, so the weight burden on the operator is reduced, and the top plates 1, 1 can be easily folded and unfolded with a small force. can be done. Note that the attachment points (upper support shafts 31, 31) of the arms 3, 3 to the chassis 11, 11 are located at the center of gravity of the top plate (the chassis 11).
The center of gravity (including the center of gravity) is set at a position slightly closer to the connecting shaft 12 than the P position (see Fig. 4). As a result, a constant force in the folding direction is always applied to the top plates 1, 1 due to the weight of the top plates.

In addition, while preventing both arms 3, 3 from falling down, they are linked to fold both top plates 1, 1 at the same time,
A pair of interlocking links 4, 4 are provided between the intermediate portions of both arms 3, 3 and the support legs 2, 2 for the deployment operation.
is provided. These interlocking links 4, 4 are
One end of each is connected by a pin 41 in an inverted V-shaped arrangement, and the other end is attached to the support leg 2 by pins 42, 42. The pin 41 is slidably engaged with a vertically elongated guide groove 21 provided on the support leg 2, and moves up and down along the guide groove 21 as the arms 3, 3 rotate. With these links 4, 4, both arms 3, 3
always operate symmetrically around the support legs 2, and both top plates 1, 1 are simultaneously folded and unfolded by the operation of either one of them.

In addition, the arms 3, 3 and interlocking links 4,
4 are provided on both the front and rear sides of the support legs 2, as shown in FIG.

On the other hand, each of the support legs 2, 2 is provided with a vertically long notch 22 and a locking tool 5 at the top, and the connecting shaft 12 fits into the notch 22 and locks into the locking tool 5 when the top plate is unfolded. It is becoming fixed.
That is, the locking tool 5 has a hook-shaped locking part 51 at the upper end, and in a state where the locking part 51 is located at the lower end of the notch 22, the lower part rotates around this axis via the shaft 52. It is attached to the support leg 2 so that it can be rotated. A stopper 53 is provided at the lower end of the locking tool 5, and the locking portion 51 is positioned within the notch 22 with the stopper 53 in contact with the inner surface of the support leg 2. Further, a coil spring 6 is provided between this stopper 53 and the inner surface of the support leg, and this spring 6 causes the locking tool 5 to
A spring force is applied to the locking portion 51 in a direction toward the inside of the notch 22 . Note that the upper surface 5 of the locking portion 51
1a is formed on an inclined surface, and when the top plate is unfolded, the connecting shaft 1
2 is automatically locked to the locking portion 51 by the guiding action of the inclined surface 51a. Further, guide members 23, 23 are provided on both sides of the notch 22 at the upper end of the support leg 2 to ensure that the connecting shaft 12 is introduced into the notch 22.

A shaft 52 to which the locking tool 5 is attached is rotatably mounted across both support legs 2, 2.
A lever 54 is fixed to one end of 2. As the shaft 52 is rotated by operating the lever 54, the locking members 5 on both sides (only one side is shown) are simultaneously rotated in the same direction, that is, in the direction in which the locking portion 51 is disengaged from the connecting shaft 12. As a result, the locking and fixing of the connecting shaft 12 is released, and the top plates 1, 1 can be folded. In this case, as mentioned above, the folding fulcrum (upper support shaft 31) of the top plates 1, 1 is set at a position slightly closer to the connecting shaft 12 than the center of gravity position P of the top plate, so the connecting shaft 12 is not engaged. When released from the stopper 5, the top plates 1, 1 automatically rotate in the folding direction. Therefore, there is no need to press down the top plates 1, 1 with great force during this folding, making the folding operation easier.

By the way, as a locking means for locking and fixing the connecting shaft 12 to the support leg 2, in addition to the above-mentioned rotary locking device 5, for example, a locking means that moves linearly forward and backward in a direction perpendicular to the connecting shaft 12 is used. A lock can be used. In this case, the lock release means may be any lever that slides the locking tool.

(Effect of the invention) As described above, when using the invention, both top plates are
While the weight of the top plate is supported by a pair of arms, the arm attachment point to the top plate is used as a movable fulcrum to fold or unfold, so the structure is simple, yet the top plate can be pivoted to the supporting legs unlike conventional methods. Compared to a configuration in which both top plates are folded and unfolded using a point as a fixed fulcrum and the operator supports all the weight of the top plate, the weight burden on the operator can be significantly reduced, and the top plate can be folded easily with a small amount of force. It can be expanded. Further, since both arms are interlocked and connected by a pair of interlocking links, and both top plates can be folded and unfolded simultaneously by operating one side of the top plate, the operation becomes even easier.

[Brief explanation of the drawing]

Fig. 1 is a side view of a table according to an embodiment of the present invention in an unfolded state, Fig. 2 is a front view of the same, Fig. 3 is a front view of the table in a folded state, and Fig. 4 is a view of the table in its folded or unfolded state. It is a partially cutaway enlarged front view showing. 1, 1...A pair of top plates, 12...A shaft connecting the top plates, 2, 2...Support legs, 3, 3...A pair of arms, 31...A shaft for attaching the arm to the top plate (movable) 32... Attachment shaft to the support leg of the arm, 4, 4... Interlocking link, 5... Locking tool constituting the locking means, 6... Spring, 54...
...Lever as a lock release means.

Claims (1)

[Scope of utility model registration request] It is equipped with a pair of top plates and support legs that support both of the top plates, one end of each of the top plates is rotatably connected to each other via a horizontal connecting shaft, and the lower ends of the pair of arms The upper end is rotatably connected to the support leg and the upper end to both top plates via an upper support shaft and a lower support shaft parallel to the above-mentioned connecting shaft, and both top plates are connected to the top plate by these two arms. A pair of interlocking links, which are supported on the support legs in a foldable and deployable state using the upper support shaft as a fulcrum, and are rotatable between the arms and the support legs, are connected to one end of each other. a locking means that is connected to the support leg so that the connecting end can move up and down along the support leg, and that locks and fixes the connecting shaft to the support leg when the top plate is unfolded; A folding table characterized in that it is provided with lock release means for disengaging the locking means from the connecting shaft.