JPS5911633Y2 - folding table - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a table with a bifold structure, and particularly to a folding table with an improved locking mechanism.

The present applicant previously provided a folding and unfolding device for a table (hereinafter referred to as the prior application device) described in Utility Model Publication No. 54-23521.

As shown in FIG. 1, this device includes a pair of left and right top support frames 1 and 2 at the front and back, which are divided into two parts of the same shape and size and whose opposing ends are connected with each other in a flexible manner with pins 3. There is.

The outer ends of the frames 1 and 2 are rotatably connected and supported by pins 7 and 8 to the upper ends of pillars 4 and 5 having casters 6 at their lower ends.

Therefore, when the frames 1 and 2 are lifted at or around the connecting pin 3, the pillars 4 and 5 move toward each other, thereby being folded into two. There is.

In such frames 1 and 2, the upper end of a vertical cylinder 9 is connected to the connecting pin 3 between them.

As clearly seen in FIG. 2, a slide member 10 is fitted into the hanging cylinder 9 and extends and retracts from its lower end.

The lower end of the slide member 10 always extends from the lower end of the hanging cylindrical body 9, and each frame 1 is attached to the extending end at a spaced apart position sandwiching the connecting pin 3 between the frames 1 and 2. , a pair of left and right stays 11 whose upper ends are pivotally supported by
．． The lower end portions of 12 are pivotally connected to each other by a cylindrical shaft 13.

A lock pin 14 having a knob 15 at the outer end is inserted into the cylindrical shaft 13, and the lock pin 14 is always urged toward a lock hole 20, which will be described later, by a spring 16 built into the cylindrical shaft 13. .

The knob 15 has a tapered boss portion 15a that extends toward the cylindrical shaft 13 and has a gradually smaller diameter on the extending end side.

A lock release ring 18 is loosely fitted onto the lock pin 14 between a knob 15 and a nut 17 that is screwed onto the outer periphery of the cylindrical shaft 13 to fasten the cylindrical shaft to the slide member 10. .

When the lock pin 14 is pulled against the spring 16, the ring 18 slides on the tapered surface of the boss portion 15a of the knob 15 and falls between the tip surface of the boss portion and the outer end surface of the cylindrical shaft 13. This holds the lock pin 14 in the unlocked position.

On the other hand, the upper end of a locking member 19 is fastened to the lower end of the hanging cylinder 9, and the lock hole 2 is inserted into the hanging piece 19a of the member.
0 has an aperture shape.

In the positional relationship between the lock pin 14 and the lock hole 20,
When the frame 1.2 is in the horizontally unfolded position, the slide member 10 is in its most retracted state within the depending cylinder 9, and the lock pin 14 is held in a position facing the lock hole 20.

Therefore, in this state, the lock release ring 18 is removed from the boss portion 15.
When the lock pin 14 is released from between the tip of the a and the outer end of the cylindrical shaft 13, the lock pin 14 automatically fits into the lock hole 20 by the force of the spring 16, thereby locking the hanging cylinder 9 and the slide member 10.

In the device of the prior application constructed as described above, when the table is folded, the lock pin 1 can be locked by simply pulling the knob 15 of the lock pin 14.
4 can be automatically held in the unlocked position by the lock release ring 18, and therefore the folding and unfolding operations of the table can be easily carried out by one person.

However, in the device of the prior application, each time the table is locked in the unfolded state, the lock release ring 1 must be manually operated.
8 must be released from between the boss portion 15a of 15 and the cylindrical shaft 13.

In particular, the above-mentioned lock pin 14, knob 15, spring 1
6. If locking devices comprising lock release rings 18 are provided on both sides of the table and the table is large,
Since it is necessary to move around the table and operate the lock release rings 18 on both sides, the operation becomes extremely troublesome.

Furthermore, when the lock release ring 18 is released as described above, the lock pin 14 moves vigorously in the spring 16 at the same time, so that fingers, etc. I'm used to pinching.

Therefore, the present invention was devised to further improve the device of the prior application.

That is, the main purpose of this invention is to provide a folding table that can be automatically locked in a horizontally unfolded position.

Another object of this invention is to provide a folding table that can further simplify the folding and unfolding operation of the table.

Another object of this invention is to provide a highly reliable folding table that can guarantee safety.

Hereinafter, a preferred embodiment of this invention will be described based on the drawings from FIG. 3 onwards.

However, since the folding table according to this invention has almost the same structure as the device of the prior application shown in FIGS. Omitted.

That is, the illustrated example structure of this invention is different from the device of the earlier application in that a shutter member 21 for opening and closing the lock hole 20 is provided in place of the lock release ring 18 in the device of the earlier application.

The shirt shutter member 21 has a proximal end pivotally supported on the locking member 19 facing the slide portion 1 or 10 side.

As a pivoting means, the locking member 19 is integrally formed with a protrusion 19b (see FIGS. 5 and 7) extending outward from one side of the lock hole 20, and the shutter member 21 is attached to the protrusion 19b (see FIGS. 5 and 7). The proximal end portion of is pivotally supported by a pin 22 so as to be vertically movable.

The shutter member 21 is made of a thin metal plate, and a stopper piece 21a is integrally formed on the outer edge of the proximal end, and the stopper piece 21a is connected to the protrusion at a position where the shutter member 21 blocks the lock hole 20. 19b to engage with the upper edge.

Such a shutter member 21 has a lock hole 20 formed by engaging the stopper piece 21a with the upper edge of the protruding piece 19b.
The cutoff position is the lowering limit position.

Therefore, the shutter member 21 is configured to rotate and descend under its own weight to the lowering limit position, and then to open the lock hole 20 by being rotated upward from this position.

Therefore, in the folded table state where the top plate support frames 1 and 2 are folded in two at the connecting pins 3 between them as shown in FIG. There is a lock pin 14 at the bottom end.
A lock hole 20 is located at a position spaced apart above the lock pin, that is, at the lower end of the hanging cylinder 9.

In this state, the lock pin 14 protrudes from the tip opening of the cylindrical shaft 13 due to the force of the spring 16 because there is no obstacle in front of it, while the lock hole 20 is closed due to the shutter member 21 being free. It is blocked by the shirt shutter member.

From this table folded state, the top plate support frame 1,
2 is deployed to the horizontal position, the slide member 10 is raised via the stays 11, 12 that follow the frame.

As a result, as the lock pin 14 approaches the lock hole 20, the tip of the pin slides against the taper of the hanging piece 19b of the locking member 19 and rises.

Therefore, the lock pin 14 approaches the lock hole 20 while retracting in a direction against the spring 16 along the tapered surface of the hanging piece 19b.

Then, the lock pin 14 approaching the lock hole 20
moves toward the matching position with the lock hole 20 while pushing up the shutter member 21.

When the lock pin 14 reaches this position, it plunges into the lock hole 20 by the force of the spring 16 and locks the locking member 19 on the hanging cylinder 9 side and the slide member 10, thereby locking the top plate support frames 1, 2. is held immobile in a horizontally deployed position.

When folding the top support frames 1 and 2 (table) from this state, first pull the knob 15 of the lock pin 14.

Then, the lock pin 14 resists the spring 16 and slips out from the lock hole 20 and completely escapes from the underside of the shirt shirt member 21, so that the shirt shirt member slips out of the lock pin 14.
It falls under its own weight between the tip of the lock hole 20 and the lock hole 20, and blocks the lock hole 20.

Therefore, even if you release the lock bottle 14 in this state,
The locking pin 14 is held in an unlocked position in which it cannot penetrate into the locking hole 20.

Therefore, the table can be folded with great ease.

Reference numeral 23 in Figure 3. Reference numeral 24 denotes a connecting rod that spans each of the pillars 4 and 5 and the hanging cylinder 9 and is pivotably connected at both ends.

In addition, in the table of the above embodiment, the pillars 4 and 5
A coiled toggle spring may be strung across the inner corners of the top plate support frames 1 and 2, and the top plate support frames 1 and 2.

In this case, there is an advantage that the folding and unfolding operation of the table can be carried out more easily by the action of the toggle spring.

In short, this invention can be implemented with various modifications without changing the gist.

As described above, with this invention, even if the lock pin knob is pulled and immediately released when the table is folded, the lock pin does not return to the table lock position, so the table folding operation can be performed extremely easily, efficiently, and safely. .

In addition, the table of this invention automatically locks when it is unfolded from the folded state to the horizontal position, so there is no need for any manual unlocking operation when the table is unfolded. It's very convenient.

Therefore, this invention improves the reliability and safety of the folding table.
This greatly contributes to improving flooring performance, etc.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the skeleton of a folding table according to the prior art, Fig. 2 is an enlarged sectional view of the table lock portion, Fig. 3 is a front view of the table according to a preferred embodiment of this invention, and Fig. 4
The figure is an enlarged cross-sectional view showing the locked state of the table locking device, FIG. An explanatory diagram of the position of the shirt starter member at the time,
FIG. 8 is a sectional view taken along the line ■--■ in FIG. 7, and FIG. 9 is a front view of the table in a folded state. 1 and 2 are top plate support frames, 9 is a hanging cylinder, 10 is a slide member, 11.12 is a stay, 14 is a lock pin, 1
6 is a spring, 20 is a lock hole, and 21 is a shutter member.

Claims (1)

[Scope of utility model registration request] a pair of left and right top plate support frames whose opposing ends are bendably connected; a hanging cylinder whose upper end is pivotally connected to the mutual connection; a slide member fitted into the cylinder; and the frame. A pair of left and right stays are provided, the upper end of which is rotatably connected to each of the frames, and the lower end of which is rotatably connected to the lower end of the slide member at a spaced apart position sandwiching the mutually connecting portions, In a folding table in which the hanging cylinder and the slide member are automatically locked in the horizontally deployed position, a lock hole provided on the hanging cylinder side and a lock hole provided in the slide member are provided in the horizontally deployed position of both frames. A lock pin is held in a position where it can be freely inserted into and removed from the lock hole and is always biased in the direction of insertion into the lock hole, and a lock pin is provided near the lock hole on the hanging cylinder side and is removed when the lock pin is pulled out from the lock hole. 1. A folding table characterized by having a structure including a shutter member that blocks the gap between the lock hole and the shutter member that is displaced from the lock hole blocking position to the blocking release position by a lock pin when the frame is expanded.