JPS5841044B2 - folding table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel folding table having a shelf below the top plate that interlocks with the top plate, and a common locking means for locking or unlocking the shelves in the unfolded position. .

The main object of this invention is that by simply lifting the top plate from the folded position and unfolding it, the top plate and the shelves that follow it are inevitably and reliably locked in the unfolded position, thereby ensuring a safe state. To provide a foldable table configured to be usable.

Another object of the present invention is to provide a folding table in which the top plate and shelves can be unlocked safely and easily with a very simple operation.

Still another object of the present invention is to be able to easily and smoothly fold the top board and shelf after unlocking, and to maintain the top board and shelf in a compact state along the pillars by folding. A preferred embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2 showing a folding type one-sleeved table, there are a pair of right and left leg bases 2 with casters 3 on the upper end of a pedestal 1 installed toward the rear of each leg base 2. A bracket bearing 4 whose distal end side protrudes forward is integrally formed.

The base end side of the top plate support arm 5 is pivotally supported on the front end side of the bracket bearing 4 by a pin P so as to be vertically movable.

Therefore, the top plate support arm 5 can freely rotate between a folded position in which it is in a substantially vertical position along the front surface of the pedestal 1 and a deployed position in which it is in a horizontal position directly above the pedestal 2. It has a tatami mat/installation configuration that can be expanded freely.

A top plate 6 is integrally attached to the top plate support arm 5 by screws or the like.

The top plate support arm 5 is held horizontally in the unfolded position by a bendable diagonal stay 7 which is provided astride between the top support arm 5 and the pillar 1.

The stay 7 includes an upper stay member 7a having a narrow reverse groove cross-sectional shape whose inclined upper end is rotatably supported by a pin 8 near the tip side of the top support arm 5, and an upper stay member 7a. Connect the pin 9 near the inclined lower end side of the bracket bearing 4 with the pin 9 near the upper part of the pedestal 1.
The lower stem member 7b is rotatably connected to the lower stem member 7b.

Here, the related structure of the upper stay member 7a and the lower stay member 7b will be described in more detail. The upper end portion of the upper end portion of the upper end portion of the upper stem member 7a is bently connected to the lower end side of the upper stem member 7a with a pin 10, as shown in the drawing.

Therefore, the stay 7 configured as described above has the connecting pin 10 in the intermediate portion.
is bent or extended as a bending hinge, and its bending direction is set only in the direction in which the connecting pin 10 approaches the bracket bearing 4, that is, the so-called upward direction.

The reason for this is that when the stay 7 is extended, the lower stay member 7b abuts against the inner wall surface of the upper side of the upper stay member 7a, which has an inverted groove cross-section, and uses this wall surface as a stopper surface.

Therefore, the stay 7 never bends in the direction in which the connecting pin 10 descends from the extended state, and holds the top plate 6 in the horizontal unfolded position in that state.

In such a stay 7, the proximal end side of the shelf support arm 11 is rotatably supported by the pin 9 which pivotally connects the inclined lower end side of the lower stay member 7b.

The shelf support arm 11 is interlocked with the stay 7 via a transmission link 12 which is bent into an obtuse angle shape in the illustrated example.

That is, the transmission link 12 has its lower end portion appropriately spaced forward from the proximal pivot pin 9 of the arm with respect to the side surface of the shelf support arm 11 with its inner curved portion 12a facing the pillar 1 side. They are rotatably connected by pins 14 at certain positions.

Further, the upper end side of the transmission link 12 is made slidable and rotatable relative to the approximate middle part of the upper stay member 7a of the stay 7 by means of a pin 15 that passes through a long hole 13 bored along its longitudinal direction. is connected to.

Thus, the transmission link 12 holds the top plate support arm 5 and the shelf support arm 11 in a parallel state and maintains them in an interlocking relationship.

A shelf board 16 is integrally held horizontally on the shelf support arm 11.

In the above configuration, at the inclined lower end of the stay 7 and the base end of the shelf support arm 11, there are respective hanging pieces 7' and 11' that hang down at the rear near the common shaft support so-called shaft support pin 9. It is integrally formed.

When the top plate support arm 5 and the shelf support arm 11 are unfolded in a horizontal position, these hanging pieces 7' and 11' are in contact with each other at a position spaced apart diagonally downward from the rear of the pivot pin 9. Lock holes 17° and 18 are drilled.

A lock pin 19 is provided through the pedestal 1 so that it can be inserted into and removed from the lock holes 17 and 1B when they are connected as described above.

This lock pin 19 is connected to the hanging piece 7 by a spring 20.
It is always biased towards the ', 11' side, and has a knob 21 for pulling out the lock at the end opposite to the direction of the biasing force, the so-called non-locking end.

Therefore, when the top plate support arm 5 and the shelf support arm 11 are expanded to a horizontal position, and the lock holes 17 and 18 match, the lock pin 19 is moved to the spring 2 at that point.
Enter the lock hole 17°18 with zero force and lock the stay 7.
and the shelf support arm 11 are surely locked, and the stay 7 is made unbendable.

Also, at the inclined lower end of the stay 7, the hanging piece 7
The upper end of the lock release shutter piece 22, which hangs down under its own weight along the hanging piece to a position where it blocks the lock hole 17 between the pedestal 1 and the lock hole 17, is rotatably supported on the upper part of the lock release shutter piece 22. .

This shutter piece 22 is connected to the lock hole 17 in the matching and communicating state.
When the lock pin 19 is pulled out from the lock pin 18, it rotates down by its own weight between the tip of the lock pin and the lock hole 17 on the stay 7 side, blocking the gap between them. An engagement claw 23 is provided at the upper end of the stay 7 to detachably engage with the upper edge of the lower stay member 7b.

The engaging pawl 23 extends forward from the upper end pivot point of the shutter piece 22 and engages with and disengages from the upper edge of the lower stay member 7b, and is fitted with a lock pin in each of the lock holes 17 and 18. 19 is inserted, the lower part of the shutter piece 22 is pushed forward by the lock pin, so the engaging claw 23 in this state is moved from the upper edge of the lower stay member 7b. It is held in a floating position.

In other words, when the lock pin 19 is fitted into each lock hole 17, 18, the lower rear edge of the shutter piece 22 abuts against the front surface of the peripheral wall of the lock pin 19, and the engagement claw 23
is raised from the upper edge of the lower stay member 7b (
The standby state shown in FIG. 2) is maintained.

When the lock pin 19 is pulled out from this state, the lock pin escapes from the position where it collides with the shutter piece 22, so that the shutter piece 22 has its own engaging claw 23 attached to the lower stay member 7.
It rotates down by its own weight to a position where it engages with the upper edge of b and blocks the lock hole 17.

In the cut-off state, when the stay 7 is bent to fold the top plate support arm 5 and the shelf support arm 11, the shutter piece is in a state where the engagement claw 23 is engaged with the upper edge of the lower stay member 7b. 22 is displaced following the rotation of the lower stem member 7b while keeping the lock hole 17 blocked.

The shutter piece 22, which operates as described above, passes through the tip surface of the lock pin 19 while being displaced following the lower stay member 7b.

Therefore, the lock pin 19, which is biased toward the shutter piece 22 by the spring 20, protrudes in the direction of the biasing force when the shutter piece 22 passes through its tip surface, and the lock pin 19 in the lock hole 17 in the lower stay member 7b. Collisions with nearby wall.

Therefore, when the top plate support arm 5 and the shelf support arm 11 are deployed, the rear edge of the shutter piece 22 abuts against the peripheral wall surface of the lock pin 19 and obstructs the forward movement of the lock pin in the axial direction. It is designed to be held in a position where it does not.

Next, the operation of the above embodiment will be explained in detail.

First, when the hanging end of the top plate 6 is lifted to unfold the folded one-sleeve table as shown in FIG. It rotates counterclockwise in the same figure.

At this time, the stay 7 is extended to follow the top support arm 5, and at the same time the shelf support arm 11 is moved to the top support arm 5.
rotate in the same direction.

In this case, the rotation directions of the lower stay member 7b of the stay 7 and the shelf support arm 11 are reversed.

That is, since the stay 7 extends as much as possible to become straight as the intermediate connecting pin 10 descends, the lower stay member 7b rotates clockwise around the pivot pin 9 at the lower end. The shelf support arm 11, which uses the pivot pin 9 as a common fulcrum, is interlocked with the upper stay member 7a via the transmission link 12, and therefore rotates in the counterclockwise direction in the same way as the top support arm 5. do.

As the lower stay member 7b and the shelf support arm 11 rotate in opposite directions using the pivot pin 9 as a common fulcrum, in this case, the respective lock holes 17 and 18 approach each other. move in the direction.

When both the top plate support arm 5 and the shelf support arm 11 are expanded to a horizontal position, the stays become completely straight and the lock holes 17 and 18 are aligned and interlocked.

In this case, the lock holes 17 and 18 coaxially communicate with the lock pin '19.

Accordingly, when the locking holes 17 and 18 are brought into mating communication as described above, the locking pin 19 is then inserted into each said locking hole 17, 18 by the force of the spring 20.

With this, the stay 7 and the shelf support arm 11 are locked,
Since there is no risk that the stay 7 will bend due to vibration or impact, for example, the top plate 6 and the shelf plate 16 can be held securely and firmly in the deployed position for use.

Further, when folding the top plate 6 and the shelf board 16 in the unfolded state, the knob 21 of the lock pin 19 is pressed against the spring 20.

Then, the lock pin 19 comes out of the lock hole 17, 18, and the shutter piece 22 rotates downward under its own weight and blocks the lock hole 17.

In this state, even if you let go of the knob 21, the lock pin 19
cannot enter the lock holes 17 and 18, so the knob 21 pulled as described above can be immediately released.

Next, when the tip of the shelf board 16 is lifted, the upper stay member 7a of the stay 7 is pushed up in the clockwise direction in FIG. 4 using the pivot pin 8 at the upper end as a fulcrum via the transmission link 12.

As a result, the intermediate connecting pin 10 of the stay 7 exceeds the dead point, so the stay 7 begins to bend as shown by the chain line in FIG.

Then, the top plate 6 rotates and descends under its own weight using the base end side pivot pin P of the top plate support arm 5 as a fulcrum.

Correspondingly, the curvature of the stay 7 also gradually increases, so that the shelf board 16 follows the top board 6 and simultaneously rotates downward.

As a result, each of the top plate 6, top support arm 5, stay 7, transmission link 12, shelf board 16, and shelf support arm 11 can be folded into a very compact state along the pillar 1 as shown in FIG. Folded.

As described above, according to the present invention, the following excellent effects can be exhibited.

(1) When using a folded table, by simply lifting the top plate that is hanging down along the pillars to a horizontal position, you can not only unfold the top plate and the shelf at the same time. , their tops and shelves can be automatically locked in the unfolded position.

Therefore, safety can be guaranteed when using this type of table.

(2) When the table is folded, the top plate and shelves can be easily unlocked by simply pulling the lock pin against the spring, and the pulled pin can be released immediately, so the lock pin is especially useful when the lock is released. It is possible to release the lock pin to the table while artificially maintaining it in a pulled state, and the pulled out pin can be released immediately. It is extremely convenient because there is no need to worry about folding the table.

That is, when the lock pin is pulled, the shutter piece rotates downward under its own weight and blocks the lock hole from the lock pin, so that the lock release can be easily and smoothly accomplished by simply pulling the lock pin instantaneously.

Therefore, the table can be easily and skillfully folded at any time.

(3) In addition, the shutter piece that blocks the lock hole as described above, and after the lock pin is pressed against the lock pin by the force of the spring, is displaced to follow the stay that bends when the top plate is folded, and locks. Since it is separated from the pin pressure contact position, there is no need for any troublesome operation such as artificially displacing the shutter piece from the lock hole blocking position when the table is unfolded.

Note that this invention can be implemented with various modifications without changing the gist.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of the present invention; FIG. 1 is a schematic front view of the table in its unfolded state, and FIG.
■ Line sectional view, Figure 3 is an enlarged exploded perspective view of the main parts, Figure 4 is an enlarged view of the main parts in the table unlocked state, Figure 5 is a cross-sectional view taken along the ■-■ line of Figure 4, and Figure 6 is FIG. 7 is a side view of the main part of the table in a folded state, and a sectional view of the main part. In the figure, 1 is a pillar, 5 is a top plate support arm, 6 is a top plate 7 is a stay, 11 is a shelf support arm, 12 is a transmission link, 16 is a shelf, 17.18 is a lock hole, 19 is a lock pin, 20 is a spring, and 22 is a shutter piece.

Claims (1)

[Claims] 1. In a table with a structure in which a top plate and a parallel shelf below the top plate are interlocked so that they can be expanded to a horizontal position and can be folded from the horizontal position to a hanging position along the pedestal, the upper end of the pedestal A top plate support arm whose base end is rotatably supported on the top plate support arm, a shelf support arm whose base end side is rotatably supported on the pillar at a spaced apart position below the top plate support arm, and a pivot support of the shelf support arm. and the top plate support arm, and holds the arm in an inclined and straight state at the unfolded position of the top plate support arm. A bending stay, a transmission link connecting the stay and the shelf support arm so that the top plate support arm and the shelf support arm are operated in the same unfolding or folding direction, and a transmission link between the stay and the shelf support arm. A lock hole is provided in parallel and opens near the common shaft support, and the lock holes are connected to each other when the stay is in a straight state due to the expansion of the top plate support arm and the shelf support arm, and a lock hole is provided on the pedestal side. A lock pin is provided in the lock pin and fits into the lock hole by the force of a spring when mating and communicating, and a lock pin is rotatably supported by the stay and rotates down by its own weight when the lock pin is pulled out from the lock hole. For lock release that blocks the gap between the lock hole and the tip of the lock pin, and moves away from the pressure contact position of the lock pin by following the stay that bends when the top plate support arm and shelf support arm are folded in the blocked state. A folding table characterized by comprising a shutter piece.