JPH09135729A - Foldable table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make only easy operation acceptable for both use and folding by performing sliding from the upper position of a circular groove sliding part to a lower position for fitting the rectangular groove sliding part of a lock shaft to the rectangular groove lower end part of a lower guide corresponding to the vertical position of a table plate. SOLUTION: The diameter d1 of the circular groove 7 of the lower guide 5 is made slightly larger than the diameter d2 of the circular groove sliding parts 14 and 18 and a rectangular groove width w1 is made slightly larger than the diameter w2 of the rectangular groove sliding part 17. Then, the lock shaft 16 is made slidable between the upper position where the circular groove sliding parts 18 and 14 are fitted to the circular groove 7 of the lower guide corresponding to the horizontal position of the table plate 2 and the lower position where the rectangular groove sliding part 17 is fitted to the rectangular groove 6 of te lower guide 5 corresponding to the vertical position of the table plate 2. Thus, the use and the folding are both performed just by the simple operation for individual users.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention mainly relates to a hall,
Regarding the improvement of the folding table installed in the bleachers of gymnasiums.

[0002]

2. Description of the Related Art Conventionally, in these folding tables, the stay of the stay supporting the table plate is manually folded and folded, or is housed in the curtain plate of the main body of the seat (Japanese Utility Model Publication No. 4-33325). (Gazette description).

[0003]

In the case of manual operation, when using, the table plate is lifted to search for and extend the waist of the stay hidden under the table plate, and when folding, the table plate is pressed while folding the waist of the stay. It is necessary and has a problem that it is annoying to each user.
Also, when storing the curtain plate in the main body of the bleachers, the size of the curtain plate must be set so that the table plate cannot be held by the stay. It is necessary to pull it down inside and set the table horizontally by pulling it up when using it, which is bothersome to the user and the storage operation is not always 100% complete. There was a problem in that it was not reliable when used during evacuation. It is an object of the present invention to obtain a folding table that requires only simple operation for individual users both when using and when folding. Further, another object of the present invention is to obtain a simple folding table which can surely fold a large number of folding tables at the time of emergency evacuation.

[0004]

In order to achieve the above-mentioned object, in the invention of claim 1, a hinge is rotatably provided at an upper portion of a substantially vertically standing curtain plate so as to be rotatable between a horizontal position and a vertical position. Table plate, a lower guide having a circular groove and a rectangular groove continuously bored from the upper side in a pair of groove plates projecting parallel to the center of the back surface of the curtain plate, and the lower surface of the table plate. An upper guide having a circular groove formed in a pair of groove plates projecting in parallel with the lower guide so as to align with the center line, an upper end connected by a connecting shaft, and a hole formed in the lower end. A circular groove sliding portion having a smaller diameter than the circular groove at one end and a supporting portion having a pair of stays, the hole and the circular groove of the lower guide, and a rectangular groove sliding having a diameter smaller than the rectangular groove width at the center. A lock shaft having a moving part, and fitted to the other end of the lock shaft. A compression elastic member is provided between a circular groove sliding portion having the same diameter as the circular groove sliding portion and a fixture, and the lock shaft is loosely inserted vertically and slidably into the circular groove and the rectangular groove of the lower guide. The connecting shaft is rotatably loosely inserted into the circular groove of the upper guide, and the circular groove sliding portion is fitted into the circular groove of the lower guide corresponding to the horizontal position of the table plate. From a position to a vertical position of the table plate, the lock table is slidable between lower positions where a rectangular groove sliding portion is fitted to a lower end of the rectangular groove of the lower guide. did. According to a second aspect of the present invention, in the folding table according to the first aspect, the connecting shaft is slidably loosely inserted in the rectangular groove formed in the upper guide groove plate, and the connecting shaft is placed at the horizontal position of the table plate. It is preferable that the connecting shaft is placed at the leading end of the rectangular groove of the upper guide, and in the vertical position of the table plate, the connecting shaft is placed at the rear end of the rectangular groove of the upper guide. According to a third aspect of the invention, in the folding table according to any of the first and second aspects, the boss fixed to the rectangular groove sliding portion of the lock shaft and the solenoid fixed to the upper outside of the lower guide. And an electric lock device having a pin at the tip of the lower guide, the compression reaction force of the elastic material acts on the lock shaft at the upper position when the solenoid is not energized, and the circular groove of the lower guide and the circular groove sliding portion are fitted together. The table plate is held in a horizontal position, and when the solenoid is energized, the pin reduces the compression reaction force of the elastic material through the boss to fit the circular groove of the lower guide and the circular groove sliding portion. It is preferable that the folding table is released so that the rectangular groove sliding portion is fitted and slid into the rectangular groove of the lower guide to move the table plate from the horizontal position to the vertical position.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. The folding table 1 of the present invention has the following configuration. A curtain plate 3 usually made of plywood, metal, plastic, or the like is fixed between columns 4, 4 which are substantially vertically erected on the floor surface F or on the carriage for moving spectators, and a hinge 30 is provided above the curtain plate 3. , 30, 31 and 31, and pins 32 and 32, the table plate 2 is hinged so as to be rotatable in a horizontal position and a vertical position. A circular groove 7 having a diameter d1 which is continuously formed from above in a pair of projecting groove plates 8 having a U-shaped cross section in which a groove plate holding portion 9 is fixed to the central portion of the rear surface (back surface side) of the curtain plate 3. , 7 and a rectangular guide groove 6 having a width W1 and a total length h of the lower guide 5, and a groove plate holding portion 29 is fixed to the lower surface of the table plate 2 by aligning the center line with the lower guide 2. An upper guide 26 having rectangular rectangular grooves 27, 27 having a width m and an overall length n formed in a pair of protruding groove plates 28 having a U-shaped cross section is provided. The groove plate holding portions 9 and 29 connect the groove plates 8 and 28, but the groove plates may be separated from each other and the pair of groove plates 8 and 28 may be independently fixed to the curtain plate 3 and the table plate 2. . Then, the upper end is connected by the connecting shaft 24 and the holes 25, 25 are formed in the lower end.
Support part 2 having a pair of stays 23, 23 in which
2, through the holes 25, 25 and the circular grooves 7, 7, following the head portion 19 at the edge, a circular groove sliding portion 18 having a circular cross section with a diameter d2 at one end and a diameter W2 having a circular cross section at the central portion. A lock shaft 16 having a rectangular groove sliding portion 17, a circular groove sliding portion 14 having a circular cross section with a diameter d2 fitted to the other end of the lock shaft 16, and an elastic member between the push button 21 of the fastener. Material spring 2
0 is provided compressed. Here, the diameter d1 of the circular groove 7 is slightly larger than the diameter d2 of the circular groove sliding portions 14 and 18, and the rectangular groove width W1 is the diameter W of the rectangular groove sliding portion 17.
2 is slightly larger than the circular groove 7 of the lower guide 5,
A lock shaft 16 is loosely inserted in the 7 and the rectangular grooves 6, 6 so as to be vertically slidable.

Corresponding to the horizontal position of the table plate 2, from the upper position where the circular groove sliding parts 18 and 14 are fitted into the circular grooves 7 and 7 of the lower guide 5 to the lower position corresponding to the vertical position of the table plate 2. The lock shaft 16 is slidable between lower positions where the rectangular groove sliding portions 17 are fitted in the rectangular grooves 6, 6 of the guide 5. Further, the connecting shaft 24 is rotatably loosely inserted into the rectangular grooves 27, 27 of the upper guide 26, and the table plate 2
In the horizontal position of the
6 is placed at the most distal end of the rectangular grooves 27, 27 (front side as viewed from the rear side), and at the vertical position of the table plate 2, the connecting shaft 24 is the rear end of the rectangular grooves 27, 27 of the upper guide 26 (rear surface). Placed from the side). The total length n of the rectangular grooves 27, 27 of the upper guide 26 may be set longer with a margin, but in that case, the connecting shaft 24 is positioned above the upper guide 26 at the vertical position of the table plate 2 as shown in FIG. The rectangular grooves 27, 27 are housed at the rear end portion on the front side of the rear end portions thereof, that is, at a vertical position, slightly below the uppermost position. Here, instead of the rectangular grooves 27, 27 of the upper guide 26, a circular groove is bored,
The connecting shaft 24 has rectangular grooves 27, 2 as in the above-described example.
It is also possible to place it in a fixed position in a circular groove without moving from the most distal end of 7 to the rearmost end, in which case the upper guide simplifies the structure but the entire groove length h of the lower guide 5 is It is necessary to take longer than the above example, and it becomes necessary to consider the relationship with the vertical height of the curtain plate 3, so that the rectangular groove 27,
It is more compact to install 27. It should be noted that several elastic stoppers 33 made of rubber or the like are fixed to corresponding positions on the back surface of the curtain plate 3 and the lower surface of the table plate 2, but this is not always necessary.

A boss 15 is fixed to the rectangular groove sliding portion 17 of the lock shaft 16, and an electric lock device 10 having a pin 13 at the tip of a solenoid 11 fixed to the curtain plate 3 is provided above and below the lower guide 5. I have it. When the solenoid 11 is not energized with respect to the lock shaft 16 at the upper position, the compression reaction force of the spring 20 made of an elastic material works to fit the circular grooves 7 and 7 and the circular groove sliding portions 18 and 14 to make the table plate 2 horizontal. When the solenoid 11 is energized, the pin 13 moves the boss 15 to the right in the horizontal direction in FIGS. 1 and 5 to diminish the compression reaction force of the spring 20 so that the circular grooves 7 and 7 and the circular groove sliding portion are held. The fitting of 18 and 14 is released, and the rectangular groove sliding portion 17 is fitted and slid in the rectangular groove 6 mainly by the weight of the table plate 2 so that the table plate 2 can be moved from the horizontal position to the vertical position. This electric lock device 10 is not always necessary. In that case, the lock shaft 16 is manually moved to the right in the horizontal direction in the same manner as described above, and the spring 2 is moved.
The circular groove 7, 7 and the circular groove sliding portion 1 are reduced by reducing the compression reaction force of 0.
It suffices to release the fitting of 8 and 14, but the electric lock device 1
By providing 0, it is desirable that a large number of folding tables can be folded all at once by energizing the solenoid 11 during an emergency evacuation.

Next, the operation of the folding table 1 of the present invention will be described. Normally, the folding table 1 is initially in the storage state shown in FIGS. 3 and 4C, and the table plate 2 is placed in the vertical position. If used, table plate 2
In the vertical position of, the connecting shaft 24 has a rectangular groove 27,
It is placed at the uppermost position at the rearmost end of 27, and the user places his hand on the tip of the table plate 2 (front side when viewed from the rear side).
When the contact table plate 2 on the lower part is rotated in the counterclockwise arrow P shown in FIG.
The lock shaft 16 which has moved from the rear end portion of 7, 27 to the most distal end portion and then has the square groove sliding portion 17 fitted in the lowermost portion of the square groove 6, 6 slides along the square groove 6, 6. When it rises dynamically and reaches the uppermost portion and moves to the circular grooves 7, 7, the compression reaction force of the spring 20 acts and the lock shaft 16 in which the circular grooves 7, 7 and the circular groove sliding portions 18, 14 are fitted together causes the table plate. 2 is held at the horizontal position shown by the solid line in FIG. 2 and FIG.
When circular grooves are formed in place of the rectangular grooves 27, 27 of the upper guide 26, the connecting shaft 24 is fixed at the position of the circular groove without moving and the table plate 2 is vertically moved from the horizontal position. Although it can be rotated between the positions, when the rectangular grooves 27, 27 are provided, the total length n of the grooves 27, 27 makes it possible to rotate the entire groove length h of the lower guide 5 by comparison.
It is desirable to provide the rectangular grooves 27, 27 because the length can be shortened.

On the contrary, the folding table 1 is used (see FIG. 2).
Solid line, FIG. 4 (a)) to the stored state (FIGS. 3 and 4).
For (c)), the lock shaft 16 shown in FIG. 1 is manually moved to the right in the horizontal direction to reduce the compression reaction force of the spring 20 so that the circular grooves 7 and 7 and the circular groove sliding portions 18 and 14 are moved. Is released or the solenoid 11 is energized and the pin 13
Moves the boss 15 to the right in the horizontal direction in the same manner to move the spring 20.
The circular groove 7, 7 and circular groove sliding part 1 are reduced by reducing the compression reaction force of
When the fitting of 8 and 14 is released, first, the lock shaft 1
6 is a rectangular groove 6, 6 mainly due to the weight of the table plate 2.
When it reaches the bottom of the rectangular grooves 6, 6, the connecting shaft 24 located at the tip of the rectangular grooves 27, 27 below the horizontal position moves the rectangular grooves 27, 27 upward. It rises up, reaches the rearmost end (the uppermost position in FIG. 3), and the table plate 2 moves from the horizontal position to the vertical position to be in the stored state. Square groove 27 on the upper guide 26,
When a circular groove is formed instead of 27, the connecting shaft 24 does not move and is fixed at the position of the circular groove, and the table plate 2 is rotated between the horizontal position and the vertical position.

[0010]

According to the present invention, a folding table can be obtained which requires only a simple operation for individual users both when using and when folding, and moreover, it is possible to secure a large number of folding tables all at once during an emergency evacuation. A simple folding table that can be folded is obtained.

[Brief description of the drawings]

FIG. 1 is a rear view showing an example of a folding table according to the present invention.

2 is a side view of the folding table shown in FIG. 1 in a used state. FIG.

FIG. 3 is a side view of the folding table shown in FIG. 1 in a stored state.

4 is a side view schematically showing the folding table shown in FIG. 1 in (a) use state (b) folding midway (c) stored state.

FIG. 5 is a schematic diagram showing exploded main components of the folding table shown in FIG.

[Explanation of symbols]

 1 Folding table 2 Table plate 3 Curtain plate 4 Strut 5 Lower guide 6, 27 Square groove 7 Circular groove 8, 28 Groove plate 9, 29 Groove plate holder 10 Electric locking device 11 Solenoid 13, 32 pin 14, 18 Circular groove slide Moving part 15 Boss 16 Lock shaft 17 Square groove sliding part 19 Head part 20 Spring 21 Push button 22 Support part 23 Stay 24 Connecting shaft 25 Hole 26 Upper guide 30, 31 Hinge 33 Stopping stopper d1, d2, W2 Diameter W1, m Width h, n Length P, Q Arrow direction F Floor

Claims (3)

[Claims] 1. A table plate rotatably hinged to a horizontal position and a vertical position on an upper portion of a curtain plate which is substantially vertically erected, and a table plate which is projected in parallel with a central portion of a rear surface of the curtain plate. A lower guide having a circular groove and a rectangular groove continuously formed in the pair of groove plates from the upper portion, and a pair of groove plates provided on the lower surface of the table plate in parallel with the center line of the lower guide. An upper guide having a circular groove formed in the upper end, a support portion having a pair of stays having an upper end connected by a connecting shaft and a hole formed in the lower end, and the circular groove of the hole and the lower guide. A lock shaft that penetrates through and has a circular groove sliding portion having a diameter smaller than the circular groove at one end and a rectangular groove sliding portion having a diameter smaller than the rectangular groove width at the center, and is fitted to the other end of the lock shaft. A compression elastic material between the circular groove sliding part having the same diameter as the circular groove sliding part The lock shaft is slidably inserted vertically into the circular groove and the rectangular groove of the lower guide, and the connecting shaft is rotatably loosely inserted into the circular groove of the upper guide. Corresponding to the horizontal position of the lower guide, the rectangular groove slides from the upper position where the circular groove sliding portion is fitted into the circular groove of the lower guide to the lower end of the rectangular groove of the lower guide corresponding to the vertical position of the table plate. The folding table, wherein the lock shaft is slidable between lower positions where the moving parts are fitted. 2. The folding table according to claim 1, wherein the connecting shaft is slidably loosely inserted in the rectangular groove formed in the upper guide groove plate, and the connecting shaft is in the horizontal position of the table plate. A folding table, which is placed at the most end of the rectangular groove of the guide, and in the vertical position of the table plate, the connecting shaft is placed at the rear end of the rectangular groove of the upper guide. 3. The folding table according to claim 1, wherein a pin is attached to a boss fixed to a rectangular groove sliding portion of the lock shaft and a tip of a solenoid fixed to an outer upper side of the lower guide. And an electric lock device having
When the solenoid is de-energized with respect to the lock shaft in the upper position, the compression reaction force of the elastic material acts to fit the circular groove of the lower guide and the circular groove sliding portion to hold the table plate in the horizontal position. When the current is applied to the pin, the pin reduces the compression reaction force of the elastic material through the boss, the fitting of the circular groove of the lower guide and the sliding portion of the circular groove is released, and the rectangular groove of the rectangular groove of the lower guide is released. A folding table, wherein a sliding portion is fitted and slid to allow the table plate to move from a horizontal position to a vertical position.