JP3582031B2 - Folding table - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement of a folding table mainly installed in a seat in a hall, a gymnasium, or the like.
[0002]
[Prior art]
Conventionally, in these folding tables, a stay for supporting the table plate is manually folded and folded or stored in a curtain plate of the main seat of the seat (see Japanese Utility Model Publication No. 4-33325).
[0003]
[Problems to be solved by the invention]
In the case of manual operation, it is necessary to lift the table board to use it and find and extend the waist of the stay hidden under the table board, and to fold it, it is necessary to hold down the table board while folding the stay waist, and for individual users There was a problem that it was troublesome.
Also, when storing the table board in the curtain plate of the grandstand, the table board must be large enough to store it, and the table board cannot be held by the stay. In use, it is necessary to raise the table board and set it horizontally when using it. This is troublesome for the user and the storage operation is not always 100% completely performed. There was a problem that the use at the time of evacuation was unreliable.
SUMMARY OF THE INVENTION An object of the present invention is to provide a folding table that requires only a simple operation for each user when using and folding.
It is still another object of the present invention to provide a simple folding table capable of simultaneously and reliably folding a large number of folding tables during an emergency evacuation.
[0004]
[Means for Solving the Problems]
To get the above purpose,
According to the invention of claim 1, a table plate hinged to a horizontal position and a vertical position so as to be rotatable at an upper portion of a curtain plate that is substantially vertically erected, and parallel to a central portion of the back surface of the curtain plate. A lower guide having a circular groove and a square groove continuously drilled from an upper part in a pair of groove plates protruding from the lower plate; An upper guide having a circular groove formed in a pair of groove plates, a support having a pair of stays having an upper end connected by a connecting shaft and having a hole formed in a lower end, and the hole and the lower guide. And a lock shaft having a circular groove sliding portion having a smaller diameter than the circular groove at one end portion and a rectangular groove sliding portion having a smaller diameter than the rectangular groove width at the center portion, and the other end of the lock shaft. Between the circular groove sliding portion and the fixing tool having the same diameter as the circular groove sliding portion fitted to the portion. The lock shaft is loosely inserted slidably up and down in the circular groove and the square groove of the lower guide, and the coupling shaft is loosely inserted rotatably in the circular groove of the upper guide. A lower end of a rectangular groove of the lower guide corresponding to a vertical position of the table plate from an upper position where the circular groove sliding portion is fitted into a circular groove of the lower guide corresponding to a horizontal position of the table plate. The lock table is slidable between the lower positions where the rectangular groove sliding portion is fitted.
According to the second aspect of the present invention, in the folding table according to the first aspect, the connecting shaft is slidably loosely inserted into the upper guide groove plate and slidably inserted into the rectangular groove. It is preferable that the connecting shaft is placed at the front end of the rectangular groove of the upper guide, and that the connecting shaft is placed at the rear end of the rectangular groove of the upper guide at a vertical position of the table plate.
According to a third aspect of the present invention, in the folding table according to any one of the first to second aspects, the boss fixed to the rectangular groove sliding portion of the lock shaft and the solenoid fixed outside and above the lower guide. An electric lock device having a pin at the tip of the elastic member. When the solenoid is not energized, the compression reaction force of the elastic material acts on the lock shaft at the upper position, and the circular groove of the lower guide fits with the circular groove sliding portion. Then, the table plate is held in a horizontal position, and when the solenoid is energized, the pin reduces the compressive reaction force of the elastic material via the boss to fit the circular groove of the lower guide and the circular groove sliding portion. Is released, and a rectangular groove sliding portion is fitted and slid in the rectangular groove of the lower guide, so that the table plate can be moved from a horizontal position to a vertical position.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment 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 made of usually plywood, metal or plastic is fixed between columns 4 and 4 which are substantially vertically erected on a floor F or a movable seat cart, and a hinge 30 is provided above the curtain plate 3. , 30 and 31, and the pins 32 and 32, the table plate 2 is hinged so as to be rotatable between a horizontal position and a vertical position. A circular groove 7 having a diameter d1 is formed continuously from the upper part of a pair of protruding groove plates 8 having a U-shaped cross section and having a groove plate holding portion 9 fixed to the center of the back surface (rear side) of the curtain plate 3. , 7, and a rectangular guide groove 6, 6 having a width W1 and a lower guide 5 having a total groove length h, 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 having a width m and a total length n formed in a pair of protruding groove plates 28 having a U-shaped cross section is provided. Although the groove plate holding portions 9 and 29 connect the groove plates 8 and 28, the pair of groove plates 8 and 28 may be independently fixed to the curtain plate 3 and the table plate 2 by cutting off the middle. .
The support portion 22 has a pair of stays 23, 23 having upper ends connected by a connection shaft 24 and holes 25, 25 formed in the lower end, and penetrates the holes 25, 25 and the circular grooves 7, 7. A lock shaft 16 having, at one end, a circular groove sliding portion 18 having a circular cross section with a diameter d2 and a central portion having a rectangular groove sliding portion 17 having a circular cross section with a diameter W2 following the head 19 at the edge; An elastic spring 20 is provided in a compressed state between the circular groove sliding portion 14 having a diameter d2 and a circular cross section fitted to the other end of the groove 16 and the push button 21 of the fixing tool. 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, the rectangular groove width W1 is slightly larger than the diameter W2 of the rectangular groove sliding portion 17, and A lock shaft 16 is loosely inserted into the circular grooves 7, 7 and the rectangular grooves 6, 6 of the guide 5 so as to be vertically slidable.
[0006]
The lower guide 5 corresponds to the vertical position of the table plate 2 from the upper position where the circular groove sliding portions 18 and 14 are fitted to the circular grooves 7 and 7 of the lower guide 5 corresponding to the horizontal position of the table plate 2. The lock shaft 16 is slidable between lower positions where the rectangular groove sliding portions 17 are fitted into the rectangular grooves 6.
Further, the connecting shaft 24 is rotatably loosely inserted into the square grooves 27, 27 of the upper guide 26, and at the horizontal position of the table plate 2, the connecting shaft 24 is positioned at the foremost end of the square grooves 27, 27 of the upper guide 26 ( At the vertical position of the table plate 2, the connecting shaft 24 is placed at the rearmost end of the rectangular grooves 27, 27 of the upper guide 26 (at the rear side as viewed from the rear side).
The overall length n of the rectangular grooves 27, 27 of the upper guide 26 may be made longer with a margin, but in this case, as shown in FIG. At the rear end of the rectangular grooves 27, 27 on the front side, that is, at the vertical position, slightly below the uppermost position.
Here, instead of the square grooves 27, 27 of the upper guide 26, a circular groove is formed, and the connecting shaft 24 is not moved from the leading end of the square grooves 27, 27 to the rearmost end as in the above-described example. It is also possible to set the fixed position in the circular groove. In this case, the upper guide has a simple structure, but the entire length h of the groove of the lower guide 5 needs to be longer than the above example. Since it is necessary to consider the relationship with the height in the vertical direction, it is more compact to provide the rectangular grooves 27, 27.
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.
[0007]
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 outside and above the lower guide 5. . When the solenoid 11 is not energized to the lock shaft 16 in the upper position, the compression reaction force of the spring 20 of the elastic material acts to engage the circular grooves 7, 7 with the circular groove sliding portions 18, 14, so that the table plate 2 is 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 reduce the compressive reaction force of the spring 20 to reduce the circular grooves 7, 7 and the circular groove sliding portion. The fitting of 18 and 14 is released, and the rectangular groove sliding portion 17 is fitted and slid into 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.
The electric lock device 10 is not always necessary. In this case, the lock shaft 16 is manually moved to the right in the horizontal direction in the same manner as described above to reduce the compression reaction force of the spring 20, and the circular grooves 7, 7 and the circular grooves are formed. Although the fitting of the sliding portions 18 and 14 may be released, by providing the electric lock device 10, in the case of emergency evacuation, a large number of folding tables can be reliably folded all at once by energizing the solenoid 11. So desirable.
[0008]
Next, the operation of the folding table 1 of the present invention will be described.
Normally, the folding table 1 is initially in the housed state shown in FIGS. 3 and 4 (c), and the table plate 2 is placed in a vertical position. In use, the connecting shaft 24 is placed at the uppermost position at the rearmost end of the rectangular grooves 27, 27 at the vertical position of the table plate 2, and the user places his / her hand on the tip of the table plate 2 ( When the table plate 2 is rotated in a counterclockwise arrow P shown in FIG. 4B at the lower side (on the near side as viewed from the back side), the connecting shaft 24 moves from the rearmost end of the rectangular grooves 27, 27 to the foremost part. Then, the lock shaft 16 in which the rectangular groove sliding portion 17 is fitted at the lowermost portion of the rectangular grooves 6, 6 slides up along the rectangular grooves 6, 6, and reaches the uppermost portion to reach the circular groove 7, , 7, the compression reaction force of the spring 20 acts to lock the table plate 2 by the lock shaft 16 in which the circular grooves 7, 7 and the circular groove sliding portions 18, 14 are fitted. The horizontal position shown in FIG.
When a circular groove is formed in place of the square 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. In this case, when the rectangular grooves 27 are provided, the entire length n of the lower guide 5 is made shorter due to the presence of the entire length n of the grooves 27, 27. Therefore, it is desirable to provide the rectangular grooves 27, 27 because they can be used.
[0009]
Conversely, when the folding table 1 is changed from the use state (solid line in FIG. 2, FIG. 4 (a)) to the storage state (FIGS. 3, 4 (c)), the lock shaft 16 shown in FIG. To the right in the direction to reduce the compression reaction force of the spring 20 to release the engagement between the circular grooves 7, 7 and the circular groove sliding portions 18, 14, or to energize the solenoid 11 so that the pin 13 causes the boss 15 to move. Similarly, when it is moved to the right in the horizontal direction to reduce the compression reaction force of the spring 20 and the engagement between the circular grooves 7, 7 and the circular groove sliding portions 18, 14 is released, first, the lock shaft 16 is mainly driven by the table plate. 2, slides down along the rectangular grooves 6, 6 due to its own weight, and when reaching the lowermost part of the rectangular grooves 6, 6, the connecting shaft 24 at the foremost part of the rectangular grooves 27, 27 located below the horizontal position. Rises upward in the rectangular grooves 27, 27, and reaches the rearmost end (see FIG. 3). The table plate 2 reaches the top position) Te becomes housed state moved to vertical position from a horizontal position.
When a circular groove is formed in the upper guide 26 instead of the rectangular grooves 27, 27, 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. It can be pivoted between positions.
[0010]
【The invention's effect】
ADVANTAGE OF THE INVENTION This invention can obtain the folding table which requires only a simple operation | movement both at the time of use and at the time of folding for each user, and also can fold many folding tables all at once in an emergency evacuation. A simple folding table 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.
FIG. 2 is a side view of the folding table shown in FIG. 1 in a state of use.
FIG. 3 is a side view of the folding table shown in FIG. 1 in a stored state.
FIG. 4 is a side view schematically showing (a) a use state, (b) a folding state, and (c) a stored state of the folding table shown in FIG.
FIG. 5 is a schematic view schematically showing the main components of the folding table shown in FIG. 1 in an exploded manner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Folding table 2 Table board 3 Curtain board 4 Support 5 Lower guide 6, 27 Square groove 7 Circular groove 8, 28 Groove plate 9, 29 Groove plate holder 10 Electric lock 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 20 Spring 21 Push button 22 Support part 23 Stay 24 Connection shaft 25 Hole 26 Upper guide 30, 31 Hinge 33 Stopping d1, d2, W2 Diameter W1, m Width h, n Length P, Q Arrow direction F Floor

Claims (3)

A table plate hinged to a horizontal position and a vertical position so as to be rotatable at the top of a substantially vertically standing curtain plate, and a pair of groove plates projecting parallel to the center of the back surface of the curtain plate. A lower guide having a circular groove and a square groove continuously drilled from the upper part, and a pair of groove plates protruding in parallel with the lower guide on the lower surface of the table plate with the center line aligned with the lower guide. an upper guide having a square-shaped groove, a supporting portion having a pair of stays which upper end hole in the lower end portion is connected are drilled by a connecting shaft, through a circular groove of the hole and the lower guide end A lock shaft having a circular groove sliding portion having a diameter smaller than the circular groove and a rectangular groove sliding portion having a diameter smaller than the rectangular groove width at a central portion; and the circular groove fitted to the other end of the lock shaft. A compression elastic material is provided between the fixing part and the circular groove sliding part having the same diameter as the sliding part. The locking shaft in a circular groove and square groove of the lower guide slidably loosely inserted vertically, the said connecting shaft to the upper guide towards shaped groove is loosely inserted rotatably in the horizontal position of the table plate Correspondingly, a rectangular groove sliding portion is fitted to a rectangular groove lower end of the lower guide from an upper position where the circular groove sliding portion is fitted to the circular groove of the lower guide corresponding to a vertical position of the table plate. A folding table wherein the lock shaft is slidable between lower positions to be combined. 2. The folding table according to claim 1, wherein the connecting shaft is slidably loosely inserted into a rectangular groove formed in the groove plate of the upper guide , and the connecting shaft is rectangular in the horizontal position of the table plate. A folding table which is placed at the foremost part of the groove, wherein the connecting shaft is placed at the rear end of the rectangular groove of the upper guide at a vertical position of the table plate. 3. The folding table according to claim 1, further comprising: a boss fixed to a rectangular groove sliding portion of the lock shaft; and an electric lock device having a pin at a tip of a solenoid fixed outside and above the lower guide. When the solenoid is not energized with respect to the lock shaft at the upper position, the compression reaction force of the elastic material acts, the circular groove of the lower guide and the circular groove sliding portion are fitted, and the table plate is held at the horizontal position. When the solenoid is energized, the pin reduces the compression reaction force of the elastic material via the boss, the fitting of the circular groove of the lower guide and the circular groove sliding portion is released, and the rectangular groove of the lower guide is released. Wherein the table slide can be moved from a horizontal position to a vertical position by fitting and sliding a rectangular groove sliding portion to the folding table.

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