JP2000316636A - Table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a table that is suited for a folding table whose top can be folded at the center, for example, can be manufactured inexpensively because conventional locking levers, reinforcing legs and reinforcing links are eliminated and the structure is simple, the top of which can be folded at the center and developed easily and quickly without operating conventional locking levers, the folding of the top of which is assisted by a simple structure, permitting it to be folded compactly, the appearance of which is improved by eliminating conventional coil springs and in which safety is secured during use. SOLUTION: The facing ends of a pair of tops 1 and 2 are connected rotatably through hinges 7. The tops 1 and 2 are made foldable around the hinges 7. The upper ends of studs 24 and 25 are connected rotatably to a pair of supporting frames 3 and 4. Torsion bars are provided coaxially with the pivot portions 17 of the studs 25 and 25. One end of the torsion bar is connected to one supporting frame 3, and the other end is connected to the stud 24. To develop the tops 1 and 2, the stud 24 is urged so as to rotate it inwardly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for, for example, a table-top folding table. It eliminates the conventional lock lever, reinforcing leg and reinforcing link, can be manufactured at a low cost with a simple structure, and operates the conventional lock lever. The folding state and the unfolding state of the top plate can be obtained easily and quickly without requiring, and the folding operation of the top plate is assisted with a simple configuration.
The present invention relates to a table in which a top plate can be folded compactly, a conventional coil spring is eliminated, the appearance is improved, and safety in use is ensured.

[0002]

2. Description of the Related Art In a so-called top plate folding table, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 56335/1985, a pair of left and right top plates are arranged with their inner ends facing each other, and their opposite ends are hinged. The outer end of the top plate is supported by a pillar, and a reinforcing link is provided at the joint of the top plate and a foldable reinforcing link, and a spring is applied between the joints of the top plate. It is intended to assist the folding of the top plate through its elasticity.

However, this conventional table requires a large number of parts because it requires reinforcing legs and reinforcing links, complicates the structure and contributes to high costs, and the spring is used when the table is used and when the table is folded. It is sometimes exposed and unsightly, and there is a risk that fingers may be pinched by the spring during the folding operation of the top plate, and the use state and folding state of the top plate are impaired by slight force and vibration, and those In addition to the lack of stability, there is a problem that the folded state of the top plate becomes bulky due to the reinforcing legs and the reinforcing links.

In order to solve such a problem, Japanese Utility Model Publication No. 1-30772 discloses a hook having a substantially U-shaped rod and a spring for holding one end of the hook. A stopper is provided, and when the top plate is folded, the locking portion is fitted into the joint end of the top plate, and the top plate is restrained to maintain the folded state. On the other hand, conventionally, as a means for maintaining the use state of the top plate, a method has been adopted in which a pin is inserted into a joint fitting of the top plate or a screw is screwed to restrain the top plate.

However, each of these methods has a problem that a dedicated part is required, the structure is complicated, and a lock lever operation is separately required after folding or unfolding the top plate, which is troublesome.

[0006]

SUMMARY OF THE INVENTION The present invention solves such a problem, and is suitable for, for example, a table with a center-bending type table. The conventional lock lever, reinforcing leg and reinforcing link are eliminated, and the structure is simple and inexpensive. It can be manufactured, and the folded and unfolded state of the tabletop can be obtained easily and quickly without the need for the operation of the conventional lock lever. It is an object of the present invention to provide a table that can be folded and that eliminates a conventional coil spring to improve appearance and ensure safety in use.

[0007]

According to a first aspect of the present invention, opposed ends of a pair of top plates are rotatably connected via hinges.
In a table in which the top plate is foldable around the hinge and the upper end of the pillar is rotatably connected to a pair of support frames fixed to the lower surface of the top plate, the table is coaxial with the pivot of the pillar. A torsion bar is provided on the top, one end of the torsion bar is linked to one support frame, and the other end is linked to a pillar, so that the pillar can be turned inward when the top plate is deployed. The conventional lock lever, reinforcing leg and reinforcing link are eliminated, and the structure can be manufactured at a low cost with a simple structure, and the folded state and the expanded state of the top plate can be easily and easily performed without requiring the operation of the conventional lock lever. I am trying to get it quickly. In addition, the folding operation of the top plate is assisted with a simple configuration, the top plate can be compactly folded, and the conventional coil springs are eliminated to improve the appearance and ensure the safety in use.

The invention according to claim 2 is such that the torsion bar is housed and concealed in the pivot portion, the conventional exposure of the coil spring is eliminated, the appearance is simple with a simple structure, and the safety in use is improved. We are trying to secure. Claim 3
According to the invention, both ends of the reinforcing frame are rotatably connected to one pillar and the lower surface of the opposite end of the other top plate, and the pair of reinforcing frames intersect with each other when the top plate is unfolded and are inclined. The reinforcement frame functions as a brace, strengthens the support strength when the top plate is deployed, and improves the stability when the table is used. The invention according to claim 4 is that the pivot of the hinge connecting the pair of top plates is disposed below the pivot position of the reinforcing frame connected to the top plate, and the biasing force of the pillars and the use of the top plate when the table is used. The lifting of the top plate when a heavy object is placed on the outer end is prevented to ensure safety and stability in use.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention applied to a table top folding type table will be described below. In FIGS. 1 to 5, reference numerals 1 and 2 denote a pair of left and right top plates. When the table is not in use, the inner end faces are butted, and the table can be folded around the butted portion.

The top plates 1 and 2 are formed of the same rectangular plate, and support frames 3, 3, 4 and 4 made of a rectangular tube are attached in parallel to the lower surfaces thereof, and the frames 3, 3 and 4, 4 Reinforcement frames 5 and 6 made of a rectangular tube are connected between them. The support frame 3,
The block-shaped hinges 7, 8 are inserted into the opposing ends of 4,
The end plates are rotatably arranged, and a pivot 10 is inserted into the shaft hole 9 to connect the end plates so as to be rotatable and to restrict the downward rotation angles of the top plates 1 and 2. Making it possible.

In the figure, reference numeral 11 denotes caps 11, 12, and 13 mounted on the outer ends of the support frames 3, 4, and a pair of brackets projecting downward from the reinforcing frame 6, and these brackets 12, 13 are shown in FIG. 2, the reinforcement frame 6,
6 are displaced in the longitudinal direction, and through holes 14 are formed in them.

Shaft holders 15 and 16 are attached to the inner surfaces of the outer ends of the pair of support frames 3 and 4, respectively.
Tubular shaft tube portions 15a, 16a are protrudingly provided at 5, 5 and 16, and between these shaft tube portions 15a, 16a, pivot shafts 17, which are pivot shaft portions of support frames 3, 4 and a pillar to be described later. 18 are attached. One of the rotating shafts 17 is rotatably urged by the shaft cylinder portions 15a, 15a via a torsion bar described later, and the other rotating shaft 18 is rotated by the shaft cylinder portions 16a, 16a.
a so as to be rotatable.

A fixing piece 19 is welded to one inside of the shaft cylinder portion 15a, and one end of the torsion bar is inserted into a square hole 19a of the piece 19, and the other end is connected to a square hole 21 of the fixing piece 20. Has been inserted. The fixed piece 20 is welded to the other end of the rotating shaft 17, and the torsion of the torsion bar 22 is applied to the rotating shaft 17 through the fixed piece 20.
To act on.

The torsion bar 22 is formed in the shape of a rectangular rod having a rectangular cross section. When the table for expanding the top plates 1 and 2 is used, the torsion bar 22 is twisted together with the rotational displacement of the support frame 3 to fix the torsional force. The rotation is transmitted to the rotating shaft 18 via the piece 20,
5 is rotatably urged counterclockwise in FIG. 5, while the torsional displacement is eliminated when the top plates 1 and 2 are folded, and the torsional force is eliminated. In the figure, reference numeral 23 denotes a screw for mounting the shaft holders 15 and 16.

Each of the pair of pillars 2 is
The connecting plates 26 and 27 are fixed between the lower ends of the pillars 24 and 25. A pair of brackets 28, 29 project inwardly from the connection plates 26, 27, and lower ends of reinforcing frames 30, 31 functioning as braces are rotatably connected between the brackets 28, 29. The upper end is the bracket 12, 1 on the other top plate 2 side.
It is rotatably connected between the three.

In the figures, 32 and 33 are shaft pipes fixed to the upper and lower ends of the reinforcing frames 30 and 31, respectively, and a pair of bushes 34 and 35 are fixed inside thereof. Insert the pins 36, 37 with the
Nuts 38 and 39 are screwed into the end of the screw shaft of No. 7 and assembled. In this case, the shaft tube 33 is longer than the pivot 10 by a distance e.
Located just above.

Tubular sockets 40, 41 are mounted on the lower ends of the pillars 24, 25, one ends of the projecting legs 42, 43 are mounted on the sockets 40, 41, and the tubular sockets 44, 43 are mounted on the other ends. 45 are attached. The overhang leg 4
2, 43, a pair of them is disposed so as to project obliquely outward.

In the drawing, 46 is a screw for mounting the sockets 40 and 41, 47 is a cap for plugging the upper ends of the sockets 44 and 45, 48 and 49 are casters mounted on the lower ends of the sockets 44 and 45, and It is possible to run on 50.

The table constructed in this way is composed of
There is no particular need for a reinforcing link or a reinforcing leg for reinforcing the strength of the joint of No. 2, and there is no lock mechanism for maintaining the folded state or the used state of the top plates 1 and 2, so that the number of parts is reduced and the structure is reduced. Can be manufactured easily and inexpensively.

Next, when using the table, FIGS.
The top plates 1 and 2 are placed horizontally with their inner ends facing each other, and the positions of the top plates 1 and 2 slightly outside are
The support frames 5 and 5 support the pillars 24 and 25 and the lower surfaces of the top plates 1 and 2 with reinforcing frames 30 and 31 in an oblique manner.

In such a state of use, the torsion bar 22 is concealed in the rotating shaft 17, and is not exposed as in the conventional coil spring.
Since there is no conventional reinforcing link or reinforcing leg at the joint of 2, the overall configuration is simple and the appearance is good.

In this use state, the top plates 1 and 2 are unfolded from the folded state by approximately 90 °, and the torsion bar 2 is opened.
2 are twisted at the same angle to form a constant torsional force, and the torsional force acts on the rotating shaft 17 and the pedestal 24 integral therewith, and urges them to be able to rotate counterclockwise in FIG. At the same time, the support frame 3 and the top plate 1 are urged to rotate counterclockwise in FIG.

The urging force antagonizes the weights of the top plates 1, 2 and their mounted objects, the supporting frames 3, 4 and the like, and promotes the horizontal posture of the top plates 1 and 2, For the figurine, the reinforcing frames 30 and 31 function as braces and the pillars 2
4 and 25, the hinges 7 and 8 prevent the top plates 1 and 2 from turning downward, and
4 and 25, and the stability of the top plates 1 and 2 are promoted.

Further, since the pivots 10 of the hinges 7 and 8 are located lower than the shaft tube 33 by e, the pivot 10 is
As compared with the case where the torsion bar 22 is arranged at the same height, the moments around the pivots 10 of the reinforcing frames 30 and 31 and the supporting frame 1 due to the urging force of the torsion bar 22 are reduced, and the top plates 1 and 2 are prevented from being pushed up. I do.

Further, when the object is placed on the outer ends of the top plates 1 and 2, the pivot 10 is located lower than the shaft tube 33 by e. The moment around the pivot 10 due to the mounted object is reduced as compared with the case where it is disposed at the position, and the top plates 1 and 2 are prevented from being pushed up. Therefore, the stability when using the table is increased.

When folding the top plates 1 and 2 from such a use state, the lower surfaces of the joints of the top plates 1 and 2 are lightly pushed up as shown by arrows in FIG. By doing so, the inner ends of the top plate 1 and the support frame 3 and between the top plate 2 and the support frame 4 are pushed up,
These rise and rotate about the rotation shafts 17 and 18, and the reinforcement frames 30 and 31 stand up to follow this, and the pillars 2
4, 25 are attracted to each other.

At this time, the torsional force of the torsion bar 22 is:
Among the pillars 24 and the support frame 3, it acts on the support frame 3 having a high degree of freedom, and promotes the upright displacement of the support frame 3 and the top plate 1, thereby assisting the folding operation of the top plate 1. As a result, the top plates 1 and 2 can be easily and quickly folded. In this case, the present invention eliminates the coil spring and hides the torsion bar 22 in the rotating shaft 17. This can be done safely without being pinched or injured.

Thus, the top plate 1, the support frame 3, and the top plate 2
And the supporting frame 4 gradually rises, the reinforcing frames 30 and 31 follow the standing upright, and the pedestals 24 and 25 further approach, and the top plates 1 and 2 are moved from the use state of FIG. The folding operation is completed when the sheets are folded and their lower surfaces face each other and stand substantially vertically.

In this situation, as shown in FIG. 4, the pillars 24 and 25 approach each other, and the pillars 24 and 25 and the support frames 3 and 4 are located on substantially the same vertical plane. The pivots 10 of the hinges 7 and 8 are located between the upper ends of the support frames 3 and 4 and the support frames 3 and 4 and the top plates 1 and 2 are folded vertically downward around the pivots 10 and the reinforcing frames 30 , 31 are folded vertically. Therefore, as compared with the one having the reinforcing link or the reinforcing leg at the joint portion of the top plate, it can be folded more compactly and is advantageous for storing and storing the table thereafter.

When the top plates 1 and 2 are folded,
Since the torsion bar 22 is concealed within the rotating shaft 17 and is not exposed, the appearance is good, and since the coil spring is eliminated, fingers may be pinched or injured when the top plates 1 and 2 are folded. And can do this safely.

When the table is stored and stored, the top plates 1 and 2 are positioned parallel to the support frames 3 and 4, and the torsion bar 22 in the rotating shaft 17 loses the torsional displacement, and its torsional force is reduced. Has disappeared. Therefore, the rotating force due to the torsional force is not applied to the rotating shaft 17, the support frame 3, the reinforcing frames 30, 31, and the like, and the storage state is maintained.

Next, when using the table from the stored state, the table is moved to a predetermined position via the casters 48 and 49, and the pivot 10 is pushed down as shown in FIG. Pull left and right. This way,
The pillars 24 and 25 move to the left and right via the casters 48 and 49, and the top plates 1 and 2 and the reinforcing frames 30 and 31 move together and unfold, and the inclination angles thereof are gradually reduced.

Then, the inner ends of the top plates 1 and 2 are abutted, and the hinges 7 and 8 prevent their downward displacement and are positioned horizontally, and are reinforced between the top plates 1 and 2 and the pillars 24.25. Frame 3
The use state of the table is formed when 0 and 31 are positioned obliquely. When deploying such top plates 1 and 2,
The crossing angle between the support frame 3 and the pillar 24 gradually increases, and the rotation axis 1
7, the torsion bar 22 is twisted, and the torsional force acts on the pedestal 24 and the reinforcing frame 30, and the stability of the table is reduced against the weight of the top plates 1, 2 and the mounted objects, and the supporting frames 3, 4. Prompt.

In the above embodiment, the torsion bar 2
2 is mounted on one of the rotating shafts 17, but it is also possible to mount the other on the rotating shaft 18, so that the folding operation of the top plates 1 and 2 is assisted. Easy and quick. In this case, the left and right torsion bars 2
It is necessary to adjust the torsional force of No. 2.

[0035]

According to the first aspect of the present invention, a torsion bar is provided coaxially with the pivot of the pillar, one end of the torsion bar is linked to one support frame, and the other end is linked to the pillar. Then, when the top plate is deployed, the pedestal is biased to be rotatable inward, so that the conventional lock lever, reinforcing leg and reinforcing link can be eliminated, and the conventional lock lever can be manufactured with a simple configuration at a low cost. Thus, there is an effect that the folded state and the unfolded state of the top plate can be easily and promptly obtained without the need for the above operation. Moreover, the folding operation of the top plate can be assisted with a simple configuration, the top plate can be compactly folded, and the appearance can be improved by eliminating the conventional coil spring, thereby ensuring the safety in use.

According to the second aspect of the present invention, since the torsion bar is housed and concealed in the pivot, the exposure of the conventional coil spring is eliminated, the appearance is simple, the appearance is good, and the safety in use is high. Can be secured. According to the invention of claim 3, both ends of the reinforcing frame are rotatably connected to the one pillar and the lower surface of the opposite end of the other top plate, and the pair of reinforcing frames intersect each other when the top plate is deployed. Since the reinforcement frame is arranged obliquely, the reinforcing frame can function as a brace, the support strength when the top plate is deployed can be enhanced, and the stability when the table is used can be improved. According to the invention of claim 4, the pivot of the hinge connecting the pair of top plates is disposed below the pivot position of the reinforcing frame connected to the top plate. When a heavy object is placed on the outer end of the top plate, the top plate is prevented from lifting, and safety and stability in use can be secured.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and shows a use state in which a pair of top plates are expanded.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a front view showing the embodiment of the present invention, and shows a state in which a pair of top plates are folded.

FIG. 5 is an exploded perspective view showing a main part of the present invention, showing one top plate side;

[Explanation of symbols]

 1, 2, top plate 3, 4 support frame 7, 8 hinge 10 pivot 17, 18 pivot (rotation axis) 24, 25 pillar 30, 31 reinforcement frame

Claims (4)

[Claims] 1. A pair of supports, wherein the opposite ends of a pair of top plates are rotatably connected via hinges so that the top plate can be folded around the hinges and fixed to the lower surface of the top plate. In a table in which the upper end of a pillar is rotatably connected to a frame, a torsion bar is provided coaxially with the pivot of the pillar, one end of the torsion bar is linked to one support frame, and the other end is connected to the other end. A table linked to the column, and the column is biased to be rotatable inward when the tabletop is deployed. 2. The table according to claim 1, wherein the torsion bar is housed and concealed in the pivot portion. 3. Both ends of a reinforcing frame are rotatably connected to one of the pillars and a lower surface of an opposite end of the other top plate, and the pair of reinforcing frames intersect with each other when the top plate is unfolded. The table according to claim 1, which is arranged in a shape. 4. The table according to claim 1, wherein a pivot axis of a hinge connecting the pair of top plates is disposed below a pivot position of a reinforcing frame connected to the top plate.