JP2863084B2 - Folding table extrusion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a folding stage in which a front stage and a rear stage are pivotally connected to each other, such as a folding stage. The present invention relates to an apparatus for pushing out a folding stand for pressing the folding stand to smoothly deploy the folding stand.

[0002]

2. Description of the Related Art Heretofore, as a folding table of this type, a folding stage installed in a hall or a large banquet hall such as a school, a public gym, a multipurpose hall, an inn or a hotel has been widely used. In particular, for the purpose of easily and smoothly deploying the folded base, the actual fairness 3-1
A folding device as disclosed in Japanese Patent No. 4526 is proposed.

In the above-mentioned invention, as shown in FIG. 12, a platform P which connects a front platform P2 and a rear platform P3 in a vertically foldable manner.
An extruding device (pressing means) P19 for urging the front base P2 in the developing direction (the direction of the arrow M) on the first base P20.
Is provided. As shown in the plan view of FIG. 13, the pushing device P19 includes a support member (swinging member) P22 having a roller P21 at the distal end, a gas spring P23 having the distal end pivotally connected to the support member P22. Consists of

[0004] When the platform P1 is expanded from the folded state shown by the two-dot chain line, the wire W is gradually loosened.
The horizontal member P is driven by the roller P21 of the extruder P19.
17b (member connecting the plurality of front legs P7) is pressed in the developing direction, and the front base P2 and the rear base P3 are expanded.
Then, as shown in FIG. 13, after the horizontal member P17b is pushed by the distance L (extrusion stroke L) by the roller P21 and the front base P2 and the rear base P3 are opened to a certain extent, the base P1 is moved to the front part. The table P2 and the rear table P3 are deployed by their own weight, and the entire table P1 is in a horizontal state.

That is, when the platform P1 is deployed as described above, the forward force acting on the front platform P2 due to the weight of the platform P1 (the force for pushing the front platform P2 in the deployment direction) gradually increases as the deployment proceeds. However, at the start of deployment (that is, when the platform P1 starts to open), it is almost zero. Therefore,
In the above-mentioned invention, in order to smoothly expand the table P1, the front table P2 is forcibly extruded by the extruding device P19 from the start of deployment until the table P is opened by a certain angle.

[0006]

By the way, in order to smoothly expand the table P1 by using the above-described extruding device P19, the front table P2 is pushed out with a sufficiently large force at the start of the expansion, and at the same time, the push-out operation is performed. It is necessary to lengthen the stroke L to some extent. However, in the conventional pushing device P19, if the length of the receiving member P22 is increased in order to increase the stroke L, the pushing force by the roller P22 is reduced accordingly. Therefore, there is a problem that the front base P2 cannot be pushed out with a sufficiently large force at the start of the deployment, and the deployment cannot be performed smoothly.

The present invention has been devised in order to solve the above-mentioned problems, and it is possible to push the table with a strong force at the time of starting the deployment of the table, and it is possible to increase the pushing stroke. An object of the present invention is to provide a pushing device for a folding device that can smoothly deploy a folding table.

[0008]

According to a first aspect of the present invention, which is devised to solve the above-mentioned problems, a front table and a rear table are provided on a folding table which is vertically pivotally connected to a folding table. In a pushing device for a folding table that pushes a front table of the folding table in a folded state and pushes the front table in a developing direction, a swing member swingably provided at a predetermined position on the rear table side, and the swing member Urging means for urging the front table side and oscillating the front table side, and a front end side provided at the front end of the rocking member to press a predetermined position of the front table during the deployment of the folding table. A pressing member and an intermediate pressing member that is provided at an intermediate portion of the swinging member and presses a predetermined position of the front table at the time of starting the expansion of the folding table, by including at the time of starting the expansion of the folding table. The front base is expanded by the intermediate pressing member Pressed in toward, after the said front base and the rear base is opened by a predetermined angle, characterized by further pressing the front stage in the deployment direction by said front end-side pressing member.

According to a second aspect of the present invention, in the push-out device for a folding table according to the first aspect, the intermediate pressing member is more than an imaginary line connecting the swing center of the swing member and the tip side pressing member. According to a third aspect of the present invention, in the push-out device for a folding stand according to the second aspect, the swing member is swingable to a predetermined position on the rear stand side. A rear-side member provided and urged by the urging means, and a front-side member swingably connected to the rear-side member; and A regulating means is provided for regulating the swinging of the front member toward the rear base by a predetermined angle or more at the time of pressing and holding the front member at the pressing position.

In the pushing device for a folding table according to any one of claims 1 to 3, if the swinging member is configured to swing in a substantially horizontal direction, the height of the folding table is reduced. It becomes possible to make it compact. Therefore, it is preferable because it can be suitably used for a folding stand such as a folding stage which needs to have a low height.

[0011]

According to the first aspect of the present invention having the above structure,
The swinging member is urged toward the front table by the urging means, and when the folding table starts to be deployed, a predetermined position of the front table is pressed in the developing direction by the intermediate pressing member of the biased swing member. Is done. Then, the swinging member is further urged to swing toward the front base, and after the front base and the rear base are opened by a predetermined angle, the front side pressing member provided on the front end side of the swinging member is used. The predetermined position of the front base is pressed in the developing direction.
Therefore, at the start of deployment, particularly when a large pushing force is required, the front base is pushed out by the intermediate pressing member located close to the swing center, so that a sufficiently large pushing force is applied to the front base and the base can be smoothly deployed. Started. Further, after the folding table is opened by a predetermined angle, the front table is pushed out by the tip side pressing member located far from the swing center (compared with the intermediate pressing member), thereby increasing the pushing stroke. it can.

According to the second aspect of the present invention, since the intermediate pressing member is disposed on the front table side with respect to an imaginary line connecting the swing center of the rocking member and the front-end pressing member, By pressing a member having a flat surface such as a prismatic member or a plate-like member, for example, at the start of deployment, the front base is pressed by the intermediate pressing member, and the front base and the rear part After the base is opened by a predetermined angle, the front base can be pressed by the distal-side pressing member. That is, at the time of starting the deployment of the folding platform, the flat surface of the front platform is pressed in the deployment direction by the intermediate pressing member arranged on the front platform side. When the base is opened by a predetermined angle and the swinging member swings by a predetermined angle, both the intermediate pressing member and the tip side pressing member abut on the flat surface of the front base, and the swinging member further moves forward. When swinging toward the table, the intermediate pressing member separates from the flat surface, and instead, the distal-side pressing member presses the front table in the deployment direction. Accordingly, the front base can be pressed by the intermediate pressing member at the time of starting the deployment, and the front base can be pressed in the developing direction by the distal-side pressing member during the deployment of the base.

According to the third aspect of the present invention, the front member is swingably connected to the rear member of the swing member. When the folding stand is deployed, the rear member is biased by the urging means. Is biased, and the front member swings toward the front base together with the rear member. When the distal-side pressing member presses the front base, the restricting means restricts the swing of the front-side member toward the rear base by a predetermined angle or more, and holds the front-side member at the pressing position. Is done. This allows the front stage to be pushed out by the distal end pressing member while the stage is being deployed. And especially in the invention of claim 3,
Since the front side member can be swung from the pressing position to the front base side, when the base is folded and stored, the front side member is, for example, a pillar (leg member) standing upright on the rear base side, When hitting a member such as a frame connecting the columns, the front side member is bent toward the front base. Therefore, when folding the table,
The front base and the rear base can be compactly folded and stored.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. Here, FIG. 1 is a plan view of a folding stage 1 (hereinafter, simply referred to as a stage 1) according to an embodiment of the present invention.
FIG. 2 is a side view, FIG. 3 is a front view showing a part of the stage, and FIG. 4 is a stage 1 which is being developed or folded.
FIG. 5 is a side view of the stage 1 in a folded (stored) state.

The stage 1 is provided in, for example, a school or public gymnasium, a multipurpose hall, a hall or a large banquet hall such as an inn or a hotel, and the front base 3 and the rear base 5 form an intermediate connecting part 4. It is connected so that it can be folded vertically. Front stand 3
And the rear base 5 includes a plurality of vertical members 3 each extending in the vertical direction.
b, 5b and a plurality of horizontal members 3c, 5 fixed thereon.
c, and rectangular plate-like floors 3a, 5a fixed on the horizontal members 3c, 5c. In FIG. 1,
The floors 3a and 5a are partially cut away for illustration.

As shown in FIG. 2, the vertical member 3b of the front base 3
Is rotatably mounted on the upper side of the front leg (movable leg) 7. That is, as shown in FIG.
Are provided at positions corresponding to the vertical members 3b,
Upper frame 9, central frame 11, lower frame 13
Are interconnected by As shown in FIG. 2, a distal end 3 d of the vertical member 3 b of the front base 3 is rotatably mounted on the upper frame 9 by a shaft support member 15 such as a bolt or a nut. At the lower end of the front leg 7, a floor 1
A roller 19 is provided in contact with the stage 7, and the stage 1
The front leg 7 moves in the direction of arrow A at the time of folding.

On the other hand, the rear end 5d of the vertical member 5b of the rear base 5
Is a rear leg 23 (fixed leg) which is fixedly installed upright on the wall surface 21 side.
Is rotatably mounted on the upper side of the camera. That is, the rear leg 23
Similarly to the above-described front leg 7, a plurality of frames are provided at positions corresponding to the vertical members 5 b, and the upper frame 25, the central frame 2
7 and a lower frame 29 interconnected. The rear end 5d of the vertical member 5b is
1 pivotally attached to the upper frame 25.

The lower frame 13 of the front leg 7 and the lower frame 29 of the rear leg 23 are connected by link members 33 and 35. Two link members 33, 35
Are pivotally mounted on brackets 37 provided on the lower frames 13 and 29, respectively, and as shown in FIG. 1, the ends of the two link members 33 and 35 are pivotally supported. The members 39 are rotatably connected to each other. By the link members 33 and 35, the front leg 7 can be kept vertical when the stage 1 is folded.

The rear end 3e of the vertical member 3b and the front end 5e of the vertical member 5b are rotatably mounted on the intermediate connecting portion 4 by a shaft support member 43. Intermediate connection part 4
Is fixed below an intermediate horizontal member 45 extending in the horizontal direction. A torsion coil spring 47 for urging the front base 3 and the rear base 5 when the stage 1 is deployed is attached to the intermediate connecting part 4. The spring 47 has its winding part 47a fitted and attached to the shaft support member 43, and the extending parts 47b at both ends of the spring 47 are connected to the vertical members 3b, 5b.
And urges the vertical members 3b and 5b to rotate upward (directions of arrows B and B 'in FIG. 2).

An intermediate leg 51 extending downward is fixed below the intermediate horizontal member 45. This middle leg 51
Is a hollow member having a U-shaped cross section, and as shown in FIGS. 6A and 6B, a floor surface 17 is provided inside the lower end thereof.
Is fitted so as to be slidable up and down. An upper pulley 57 on which a wire W described later is hung is attached to a side portion of the leg member 53 via an attachment shaft 55. The mounting shaft 55 and the upper pulley 57 can move up and down integrally with the leg member 53. Further, below the horizontal member 59 fixed to the side of the intermediate leg 51, two lower pulleys 61, 63 and a guide pulley 65, on which the wire W is also wound, are attached.

As shown in FIG. 1, a winding means (winch) 69 for winding the wire W is provided on the right side of the rear stage 5 of the stage 1. By winding W, the stage 1 can be folded. The wire W extending from the winding means 69
Is fixed to a wire fixing portion 79 provided on the upper frame 25 of the rear leg 9, and the wire W is moved from the winding means or 69 to the wire fixing portion 79.
Next, the stage 1 is hung over a plurality of pulleys provided at various points of the stage 1. That is, from the winding means 69 to the wall surface 21
The wire W extending parallel to the upper frame 25 is wound on a pulley 73 provided on the lower frame 29 of the rear leg 23 as shown in FIG. And is folded obliquely downward. Wire W extending diagonally below pulley 75
Is wound around a guide pulley (see FIG. 6) provided beside the above-described intermediate leg 51 and a return pulley 77 (see FIG. 1) provided on the upper frame 9 of the front leg 7, and is substantially V-viewed in a side view.
It is stretched in the shape of a letter. As shown in FIG. 6, the wire W folded back by about 180 degrees by the return pulley 77 is sequentially connected to one of the lower pulley 61 and the upper pulley 5 provided on the intermediate leg 51.
7. It is hung on the other lower pulley 63. The distal end W1 of the wire W extending obliquely upward from the lower pulley 63 is fixed to the above-described wire fixing portion 79 (see FIG. 1).
Such a winding mechanism of the wire W is substantially the same as that described in Japanese Patent Application No. 1-74846 filed by the present applicant.

As shown in FIG. 1, an extruding device 8 which is a feature of this embodiment is provided on the rear stage 5 side of the stage 1.
1 is provided in plurality. As shown in FIG. 2, the pushing device 81 is attached to the central frame 27 that connects the rear legs 23 to each other, and as shown in FIGS. 7 (plan view) and 8 (side view) in an enlarged manner. , Central frame 2
A swing member 85 pivotally attached to a mounting plate 83 fixed to the mounting member 7, a well-known gas spring 87 provided as an urging means for urging the swing member 85, and a swing member 85. Tip roller (tip member on the tip side) provided at tip section 8
9 and an intermediate roller (intermediate pressing member) 91 provided at an intermediate portion of the swinging member 85.

Here, the swing member 85 is made up of a first arm 9 (a rear side member) 93 and a first arm 9
And a second arm (front side member) 97 pivotally attached to the distal end of the third arm 3. The first arm 93 is a square member having a U-shaped cross section, and is pivotally mounted on the mounting plate 83 by a shaft support member 99 so as to be swingable in the horizontal direction. First arm 9
A roller mounting portion 101 made of a square material similar to that of the first arm 93 is mounted on the side of the distal end side of the first arm 93 so as to be orthogonal to the first arm 93. An intermediate roller 91 is provided below the roller mounting portion 101. Is rotatably mounted. The intermediate roller 91 is a flat side portion 1 of a prismatic central frame 11 (see FIG. 3) connecting the front legs 7 described above.
As shown in FIG. 8, flanges 91a, 91a are formed at upper and lower peripheral portions at intervals slightly wider than the vertical width of the central frame 11, as shown in FIG.

The gas spring 87 is pivotally mounted on the central frame 27 via a shaft support member 103 so as to be swingable in the horizontal direction. A shaft support member 107 is mounted on the opposite side of the roller mounting portion 101). This rod 105
Always has a predetermined resilient biasing force in the stretching direction (direction of arrow C) in the shortened state as shown by the two-dot chain line in FIG.
The first arm 93 is urged to swing toward the front base 3 (in the direction of arrow D).

At the tip of the first arm 93, a mounting portion 109 having a substantially U-shaped cross section with an open side is provided, and the second arm 97 (a cross section similar to that of the first arm 93) is formed. A rectangular lumber) is attached to the inside of the arm attachment portion 109 via a shaft support member 95 so as to be swingable in the horizontal direction. The tip roller 89 rotatably attached to the lower side of the tip of the second arm 97 presses the side portion of the center frame 11 of the front leg 7, similarly to the intermediate roller 91. Here, the swing angle of the second arm 97 is regulated by the side wall portion 109 a of the arm mounting portion 109, and the second arm 97 is moved to the pressing position shown by the solid line in FIG. (Position at the time of pressing) to a bending position indicated by a two-dot chain line. That is, FIG.
09 is a plan view in which the second part is broken.
When the arm 97 is at the above-described pressing position (shown by a solid line), the second end is attached to the tip of the side wall portion 109a of the arm mounting portion 109.
Since the side portion 97a of the arm 97 abuts, the second arm 9
7 does not swing from this pressed position in the direction of arrow E (toward the rear base 5). When the second arm 97 is at the bending position shown by the two-dot chain line, the corner 97b of the second arm 97
Abuts against the side wall 109a, so that the second arm 97 does not swing from the bending position in the direction of arrow F (toward the front base 3). Then, in the present embodiment, when the second arm 97 is at the pressing position as shown in FIG. 7, the intermediate roller 91 moves the shaft support member 99 of the first arm 93 (that is, the swing center of the swing member 85). It is located closer to the front table 3 than a virtual line X (indicated by a dashed line) connecting the front roller 3 and the front roller 89.

Next, the operation of the stage 1 and the pushing device 81 will be described. When the stage 1 is folded from the state shown in FIG.
Take up. Then, since the wire W whose tip is fixed to the wire fixing portion 79 is stretched over the entire length, the movable upper pulley 57 shown in FIG. 6 is attracted to the lower pulleys 61 and 63 by the wire W and fitted to the intermediate leg 51. The mounted leg member 53 is pulled down. Therefore, as shown in FIG. 6B, the leg member 53 pushes up the intermediate leg 51 and thus the intermediate connecting portion 4 together with the extension thereof, and the bending of the front base 3 and the rear base 5 is started.

Then, the lower pulleys 61 and 63 and the guide pulley 65 are pulled up by the wire W that is gradually taken up, and the front leg 7 is drawn toward the rear base 5 by the wire W, whereby the stage 1 is folded. Progresses. Then, as shown in the plan views of FIGS. 4 and 10, the front end roller 89 of the pushing device 81 is moved to the front leg 7.
Abuts on the side surface of the central frame 11. Further wire W
Is advanced, the center frame 11 moves in the direction of arrow A, and the swinging member 85 swings toward the rear base 5 (in the direction of arrow D), whereby folding proceeds. And FIG.
As shown by a two-dot chain line in FIG.
When it moves only, the two rollers 89 and 91 become parallel to the central frame 11, and the intermediate roller 91 contacts the central frame 11. And, furthermore, the central frame 1
When 1 moves, the swinging member 85 swings and the tip roller 89 moves away from the center frame 11, and finally, the center frame 11 moves by the distance L2, and the folded state (housing state) shown in FIG. Becomes At this time, as shown by a two-dot chain line in FIG.
It comes into contact with the central frame 27 connecting the rear legs 23 and bends toward the front base 3 (in the direction of arrow D). Therefore, in the present embodiment, the swinging member 85 does not interfere with the folding storage, and the center frame 11 (that is, the front leg 7) and the rear leg 2 are not obstructed.
3 can be brought closer, and the stage 1 can be stored compactly.

On the other hand, when the stage 1 is expanded from the folded state shown in FIG. 5, the wound wire W is gradually loosened. Then, the biasing force of the gas spring 87 acts, and the center frame 11 is pressed by the intermediate roller 91 of the pushing device 81 in the developing direction (the direction of the arrow M), whereby the front base 3 and the rear base 5 are expanded, and the stage 1 is expanded. Is started. The spring 4 provided on the intermediate connecting portion 4
7 also urges the front base 3 in the direction of arrow B to assist the stage 1 in deployment.

When the center frame 11 is pressed by the intermediate roller 91 by a distance L2, the second arm 9
7 is in contact with the center frame 11, and the second arm 97 is in the above-described pressing position (see FIGS. 7 and 9).
Rocks until. And hereafter (section of distance L1)
The center frame 11 is pressed in the development direction M by the tip roller 89 instead of the intermediate roller 91, and the development of the stage 1 proceeds. When the front table 3 is pressed by the tip roller 89, the swing of the second arm 97 toward the rear table 5 is regulated by the side wall 109a of the arm mounting section 109. It is held at the above-mentioned pressing position. Therefore, the front table 3 is formed by the front roller 89.
Can be extruded.

Then, when the center frame 11 is pressed by the distance L1, the rod 105 of the gas spring is fully extended, and the swing of the swing member 85 is stopped.
The stage 1 becomes horizontal as shown in FIG. As described in detail above, in the pushing device 81 of this embodiment, the swinging member 85 is provided with the tip roller 89 and the intermediate roller 91, and the intermediate roller 91 is connected to the swing center of the swinging member 85 and the tip roller 89.
Are arranged on the front base 3 side with respect to a virtual line X (see FIG. 7) connecting. As a result, at the start of the stage 1 deployment, the flat side surface 11a of the center frame 11 of the front platform 3 is pressed in the deployment direction M by the intermediate roller 91, and the front platform 3 and the rear platform 5 are opened by a predetermined angle. Later, ie, center frame 1
After 1 has advanced by the distance L2, the side surface portion 11a of the central frame can be pressed in the developing direction M by the tip roller 89 similarly. Therefore, at the start of deployment where a large pushing force is required, the front base 3 is pressed by the intermediate roller 91 located near the swing center of the swing member 85, and the front base 3 is pushed with a sufficiently large force. Thus, the deployment of the stage 1 can be started smoothly. After the stage 1 is opened by a predetermined angle,
Since the front table 3 is extruded by the tip roller 89 located at a position far from the swing center, the stroke for extruding the front table 3 can be made longer than in a conventional extruder. That is, in the present embodiment, the front base 3 can be pushed out with a sufficiently large force at the start of the deployment, and the pushing stroke can be increased, so that the stage 1 can be smoothly deployed. effective.

In this embodiment, the swing member 85
Are composed of a first arm 93 urged by a gas spring 87 and a second arm 97 swingably connected to the first arm 93. When the front roller 3 is pressed by the tip roller 89, the arm mounting portion 109 is pressed.
The rear portion 5 of the second arm 97 is formed by the side wall portion 109a of the second arm 97.
Is regulated so that the second arm 97 is held at the pressed position. As a result, when the stage 1 is stored, the second arm 97 swings from the pressed position toward the front base 3 and bends, so that the second arm 97 is folded (see FIG. 5).
(See FIG. 3), the distance between the front leg 7 and the rear leg 23 can be shortened, and the stage 1 can be stored compactly.

In this embodiment, the swing member 85
Is configured to swing horizontally, which is preferable because the height of the stage 1 can be reduced. Furthermore,
In the present embodiment, rotatable rollers 89 and 91 are used as the tip side pressing member and the intermediate pressing member,
When the stage 1 is unfolded or stored, the center frame 1
The rollers 89 and 91 that come into contact with the rollers 1 and 27 rotate. Therefore, when the front base 3 is pressed, the rollers 89, 9
This is preferable because no sliding resistance is generated between the first frame 1 and the center frames 11 and 27, and wear of the members is reduced. In addition, in order to reduce the above-mentioned sliding resistance and abrasion of the member, the roller 8 is used as the tip side and the intermediate pressing member in the present invention.
Preferably, a rotatable member such as 9, 91 is used, but a non-rotatable member may be used in some cases.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it is needless to say that the present invention can be implemented in various modes.
For example, in the above embodiment, the swing member 81 is connected to the first arm 9.
3 and the second arm 97 so as to be bendable, but even if the swinging member is not bendable,
Extrusion effects similar to those of the above embodiment can be obtained. That is, for example, as shown in FIG. 11A, even when the tip roller 113 and the intermediate roller 115 are provided on one swing member 111, the same pushing effect as in the above embodiment can be obtained. it can.

As shown in FIG. 11 (B), a tip roller 123 and an intermediate roller 125 can be provided at the tip and the middle of the swinging member 121 having a substantially rectangular shape.
Also in this case, the intermediate roller 113 is represented by an imaginary line Y connecting the swing center 117 of the swing member 111 and the tip roller 113.
Therefore, the side portion 11a of the center frame 11 of the front base 3 can be pressed in the same manner as in the above embodiment.

In the above embodiment, the gas spring is used as the urging means for urging the swing member.
The present invention is not limited to this. For example, a resilient member such as a coil spring may be used. Further, in the above embodiment, the intermediate pressing member (intermediate roller) is disposed on the front table side with respect to an imaginary line connecting the swing center of the swinging member and the tip side pressing member (tip roller). In the present invention, even when the two pressing members are not arranged in this manner, the relative positional relationship between the two pressing members and the pressed portion of the front base (the portion pressed by the two pressing members) is appropriately adjusted. By adjusting
At the start of deployment, the front base can be pressed by the intermediate pressing member, and the front base can be pressed by the distal end pressing member during deployment. That is, as shown in FIG. 11C, for example, the intermediate roller 133 and the front roller 135 are attached to the straight swing member 131, and the swing centers 137 of the rollers 133 and 135 and the swing member 133 are linearly formed. In this case, if the pressed portion 139 of the front table pressed by the intermediate roller 133 is provided so as to protrude toward the rear table from the pressed portion 141 pressed by the tip roller 135, the intermediate roller is provided at the start of development. The pressed portion 139 can be pressed by 133, and the pressed portion 141 can be pressed by the tip roller 135 during deployment.

[0036]

As described above, according to the pushing device of the first aspect of the present invention, the swinging member provided at the predetermined position on the rear base so as to be swingable, and the swinging member is urged to urge the swinging member. Urging means for swinging to the front base side, a tip side pressing member provided at the tip end of the swinging member for pressing a predetermined position of the front base during the deployment of the folding stand, and an intermediate portion of the swinging member Provided with an intermediate pressing member that presses the predetermined position of the front base at the time of starting the deployment of the folding platform, so that the platform can be pushed out with a strong force at the time of starting the deployment of the folding platform, and the pushing stroke can be reduced. It is possible to increase the size of the folding table, which brings about a remarkable effect that the folding table can be smoothly expanded.

According to the second aspect of the present invention, since the intermediate pressing member is disposed on the front base side with respect to the imaginary line connecting the swing center of the swing member and the distal end pressing member, at the time of starting the deployment. Pressing the flat surface of the front table in the developing direction by the intermediate pressing member, and pressing the flat surface of the front table in the developing direction by the distal-side pressing member after the front table and the rear table are opened by a predetermined angle. Becomes possible. Therefore, the platform can be pushed out with a strong force at the start of the deployment, and the pushing stroke can be increased, so that the effect that the deployment of the folding platform can be performed smoothly can be obtained.

According to the third aspect of the present invention, the front side member can be swung from the pressing position toward the front base so as to be bent. It does not interfere with members such as pillars on the rear base side. Thus, the front table and the rear table can be brought close to each other in the folded state, and the folding table can be stored compactly.

[Brief description of the drawings]

FIG. 1 is a plan view of a folding stage according to an embodiment.

FIG. 2 is a side view of a folding stage according to the embodiment.

FIG. 3 is a front view showing a part of the folding stage of the embodiment.

FIG. 4 is a side view of the stage during deployment or folding.

FIG. 5 is a side view of the stage in a folded state.

FIGS. 6A and 6B are explanatory views showing a configuration of the intermediate leg, in which FIG. 6A is a front view showing a part of the intermediate leg cut away, and FIG. 6B is a front view in a state where the intermediate leg is lifted.

FIG. 7 is a plan view showing an extruding device according to the embodiment.

FIG. 8 is a side view showing the extrusion device of the embodiment.

FIG. 9 is an explanatory diagram showing a configuration of a connection portion between a first arm and a second arm.

FIG. 10 is an explanatory diagram showing the operation of the pushing device.

FIG. 11 is an explanatory view showing an extruding device of another embodiment.

FIG. 12 is a side view showing a folding device provided with a conventional extrusion device.

FIG. 13 is a plan view showing a conventional extrusion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Folding stage 3 ... Front stand 4 ... Intermediate connection part 5 ... Rear stand 7 ... Front leg 9 ... Rear leg 11 ... Center frame 81 ... Extruding device 83 ... Mounting plate 85 ... Swinging member 87 ... Gas spring 89 ... Tip roller 91 ... Intermediate roller 93 ... First arm 97 ... Second arm 101 ... Roller mounting part 109 ... Arm mounting part 109a ... Side wall part

Claims (3)

(57) [Claims] 1. A folding platform, wherein a front platform and a rear platform are provided on a folding platform which is pivotally attached to the vertical platform, and presses the front platform of the folding platform in a folded state and pushes the front platform in a developing direction. In the pushing device, a swing member swingably provided at a predetermined position on the rear table side, biasing means for biasing the swing member to swing toward the front table side, A tip-side pressing member provided at a distal end of the member and pressing a predetermined position of the front base during the deployment of the folding platform; and a deployment start of the folding platform provided at an intermediate portion of the swinging member. An intermediate pressing member that presses a predetermined position of the front base at times, and at the start of deployment of the folding base, the intermediate pressing member presses the front base in the developing direction, and the front base and After the rear base is opened by the specified angle, An extruding device for a folding table, wherein the front table is further pressed in an unfolding direction by an end-side pressing member. 2. The apparatus according to claim 1, wherein the intermediate pressing member is disposed closer to the front base than an imaginary line connecting the swing center of the swing member and the tip side pressing member. Folding table extrusion device. 3. The swing member is swingably provided at a predetermined position on the rear base and is urged by the urging means. The swing member is swingably connected to the rear member. Further, when the front stage is pressed by the front end side pressing member, the front side member restricts swinging of the front side member to the rear stage side by a predetermined angle or more, and the front side member is moved forward. 3. The apparatus according to claim 2, further comprising a restricting means for holding the unit side member at the pressing position.