JPH0333897Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a spacer between support legs in a telescoping stepped grandstand.

[Conventional technology]

In recent years, in order to use the interior of gymnasiums for multiple purposes, it has become common for gymnasiums to install retractable and movable tiered seats on a portion of the floor near the wall. Although not shown, each movable platform from the first movable platform to the highest movable platform is connected to each other under multiple stages that increase in height, and expands and contracts in the front and rear direction. It is formed so that it can be moved by. When these seats are in use, they are pulled out one after another, starting with the lowest movable platform at the front, and the entire structure is extended like a dais, so that a large number of spectators can sit on the chairs installed on each of the movable platforms. It can be used as a seating area for spectators. In addition, when the bleachers are not in use, each of the movable platforms mentioned above can be moved backwards, starting from the first movable platform and returning to the bottom of the highest movable platform, contrary to the above. It was constructed so that it could be reduced to a vertical shelf under the highest movable platform, and thereby be stored in a storage recess provided on the wall side of the building. However, as shown in FIGS. 7 and 8, conventional bleachers of this type have support legs 1 at each level, with running rollers 2 at the bottom and supports 3 at the top. , when the movable platform for each stage is gradually arranged outward in the direction B in proportion to the increase in height, the above-mentioned support legs 1 do not come into direct sliding contact with each other during forward or backward movement, and In order to maintain an appropriate clearance between the columns 3, the following spacers F are installed on the sides of both column legs 1.
was installed. That is, a U-shaped roller mounting plate 8 is attached to the initial end position of the inner and outer surfaces of the support legs 1 that face each other when they move and stop, and a guide roller 9 is inserted into the roller mounting plate 8 by inserting a pin 10 thereinto. It was equipped with a spacer F arranged rotatably. Therefore, when moving the seats,
Each side of the support leg 1 is a mating guide roller 9.
The structure was such that a clearance was maintained between both supports 3 by sliding contact through rolling motion.

[Problem that the invention attempts to solve]

Due to the above-mentioned configuration, the spacers between the support legs in conventional bleachers of this type have the following problems.

(1) The above-mentioned conventional spacer F uses a guide roller 9 that rolls and slides into contact with the supporting column leg 1 of the other party, so when this roller 9 rolls, a large load is placed on the pin 10, which worsens the rolling rate. did. Therefore, when the seats are moved, the rollers 9 roll unevenly and come into sliding contact, which has the disadvantage that the coating on the side surfaces of the support legs 1 is peeled off.

(2) Furthermore, since the conventional spacer F uses a perfect circular roller 9 as a means of maintaining the distance between the support legs 1, a roller mounting plate 8 is required to support this roller 9 in a rollable manner. It was hot. Therefore, the parts have become larger and the number of parts has increased, which has the drawback of increasing costs.

[Means for solving problems]

This idea solves the problems of the conventional technology described above, and by directly attaching a spacer made of a material with a low coefficient of friction to a size smaller than a semicircle, it is possible to achieve a low coefficient of friction. To provide a spacer between support legs of a retractable stair-shaped bleachers, which prevents damage to the paint film of the support legs through balanced sliding contact, and reduces cost by using a single type of parts. The feature of this invention is that the movable platform is made up of multiple stages, each of which is constructed by erecting columns on prop legs with running rollers at the bottom and assembling them in such a way that they increase in height in order. In a spectator seat that can be moved by extension and contraction, an arcuate convex surface is formed on one side and a detent is provided protruding from the other side at the starting and ending positions of the inner and outer surfaces where the support legs face each other when moving and stopping. The spacer is molded from a material with a low coefficient of friction such as synthetic resin in this manner, and the surface on which the rotation stopper is projected is attached to the support leg surface.

[Effect]

When using or storing the bleachers with the above configuration, the lowest movable platform should be sequentially pulled out and retreated from the topmost column leg, and the movable platform of each tier should be moved. It moves to extend like a pedestal or to contract like a vertical shelf, and in this case, the support legs of each stage form an arcuate convex surface smaller than a semicircle on one side at the beginning and end of the inner and outer surfaces. Since a small spacer molded from a material with a low coefficient of friction is directly attached to the side with a small convex detent protruding from the side, the sliding contact between the above-mentioned support legs on the sides is minimally stable. While maintaining this distance, movement can be started smoothly. Therefore, even if the spacer slides into contact with the side surface of the other support leg, damage to the coating film on that side surface can be reliably prevented. In addition, since the above spacer is formed with a circular convex surface smaller than a semicircle, the ideal distance between adjacent support legs and supports is maintained so that they do not slide into contact with each other or are too far apart. It is possible to move the movable platforms of each stage arranged in a stable state with little oscillation.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

Parts of it (pillar leg 1,
When in use, the entire bleachers (not shown), including the traveling rollers 2, pillars 3, guide plates 4, and lock cams 6), are moved from the storage recess on the rear wall to the front A.
A running roller 2 is provided at the bottom, and a support 3 is erected at the top in order to move forward onto the floor surface D of the vehicle, and to move backward from this floor surface D into the rear storage recess when not in use. The pair of left and right support legs 1 are gradually arranged in the direction of the outside B in proportion to the increase in the height of the movable platform (not shown) installed on the supports 3 of each stage, and each of the above-mentioned supports 3 is also After the pillar legs 1 are formed to increase in height, a guide plate 4 is installed at the front end of each of the pillar legs 1 except for the front stage to set the forward movement of each stage. The rear surface of all the columns 3 is provided in a protruding manner on the passageway, and on the base end surface in the inner C direction of each column 3 at each position, in order to fix a movable platform reduced in the shape of a vertical shelf. A lock cam 6 for integrally connecting all the support legs 1 in parallel at the same position by locking the claws 6a to a mooring rod (not shown) inserted from the side.
The support legs 1 at each tier are arranged so that they can be raised and lowered using the support shaft 7 at the base end as a fulcrum, thereby fixing the entire structure and making it possible to move by expanding and contracting in the front and rear directions. A spacer 5 shown below is directly attached to the side surface of.

This spacer 5 is formed as follows.
In other words, as shown in FIGS. 4 to 6, the spacer 5 is made of nylon 6, which is a synthetic resin material with a low coefficient of friction, and its shape is similar to that of a circular disc body. One side of the direction is formed into an arcuate convex surface 5a smaller than a semicircle. A horizontal hole-shaped recess 5b having a depth toward the other side is formed near the first end of this arcuate convex surface 5a, and a small-diameter mounting hole 5c communicating with the other side is formed in the bottom surface of this recess 5b. is provided. Also, near the end of the other side opposite to the arcuate convex surface 5a,
At a position where the periphery thereof is cut out toward one side, a horizontally arranged small-diameter columnar rotation stopper 5d is provided in a protruding shape with its tip exposed further outward than the circumferential surface on the other side. By forming the rotation stopper 5d, the back side of the arcuate convex surface 5a is hollowed out, thereby providing cushioning properties to the arcuate convex surface 5a.

The spacer 5 formed as described above is attached as follows at the starting and ending positions of the inner and outer surfaces of the support legs 1 that face each other when they move and stop. That is, as shown in FIGS. 1 to 3, the spacer 5 according to the above is assembled by inserting the tip of the detent 5d into a small diameter hole (not shown) previously provided in the support leg 1 at the above position.
After the arcuate convex surface 5a is parallel to the longitudinal direction of the support leg 1 and comes into contact with it, a screw (or a potprivet, etc.) is inserted from the mounting hole 5c of the recess 5b into a stopper hole (not shown) drilled in the side surface of the support leg 1. It is directly attached by inserting it and tightening it.

When using the bleachers with the above configuration, when the drive source (not shown) such as a motor is activated, the lowest movable platform (not shown) is first placed in the uppermost stage (), starting with the support leg 1. A in front of it
It will move forward onto the floor D. The moment when the column 3 erected on the column leg 1 of the frontmost stage ( ) contacts the guide plate 4 protruding from the tip of the column leg 1 of the next stage ( ) adjacent to the outside B. From then on, it moves forward as one body with the support leg 1 on the next stage ( ) side via this guide plate 4 .

In this way, the above adjacent stages (), (),
When each strut leg 1 in ()... moves forward, the strut leg 1 of each stage (), (), ()... is moved forward by the strut leg 1 of the next stage (), ()... side adjacent to its outside B. It moves forward parallel to the above, but at the same time, at the beginning and end of the sides where the support legs 1 corresponding to the above-mentioned adjacent stages (), () and (), () face each other, there are 6
Since the spacers 5 molded into the same shape from nylon synthetic resin are directly attached to each other, the sliding contact between the side surfaces of the support legs 1 located at the adjacent stages (), (), ()... is minimal. It is possible to smoothly start moving while maintaining a stable distance between the two. Therefore, even if this spacer 5 comes into sliding contact with the side surface of each support leg 1 of the adjacent stage (), (), ()..., it is possible to reliably prevent damage to the coating film on the side surface.

In addition, when the use of the bleachers is finished and the seats are moved backwards to the reduced position, each support leg 1 is moved smoothly while maintaining a stable spacing, in the same way as above. You can retreat.

Further, the spacer 5 described above has a plane and a cross-sectional shape smaller than a semicircle, which is a perfect circle with a part cut out, and an arcuate convex surface 5a is formed on one side of the spacer 5. Therefore, the ideal spacing between the support legs 1 and support posts 3 of each adjacent stage (), (), ()... is maintained so that they do not slide into contact with each other or are too far apart. It is possible to move a movable bed in a stable state with little shaking.

In the above embodiment, each spacer 5 is formed by molding nylon 6, but this invention is not limited to the above embodiment. For example, even if molded from oil-impregnated metal, etc., this oil-impregnated metal will have the same friction resistance. Since the coefficient is low, the same actions and effects as in the above embodiment can be obtained.

[Effect of idea]

This idea is based on a multi-tiered movable platform that is made up of columns that are set up on prop legs equipped with running rollers at the bottom, and that are assembled in such a way that they increase in height in order.The platform can be moved forward and backward by expanding and contracting. In the bleachers,
At the start and end positions of the inner and outer surfaces of the above-mentioned support legs that face each other when they move and stop, an arcuate convex surface is formed on one side and a detent is protruded from the other side, using a material with a low coefficient of friction such as synthetic resin. The spacer is characterized in that the surface on which the rotation stopper is projected is attached to the support leg surface. Therefore, the above-mentioned spacer ensures stable movement between the support legs with a low coefficient of friction and balanced sliding contact, which not only improves the quality of this type of bleachers, but also allows the support legs to Since only a single part, the spacer, is required for the spacer, there are effects such as a significant cost reduction.

[Brief explanation of the drawing]

Figure 1 is a side view of the lower base of the bleachers equipped with spacers according to this invention and the main parts when fully pulled out, Figure 2 is a plan view of the same, and Figure 3 is the E of Figure 1.
4 is a plan view of the spacer according to this invention, FIG. 5 is a vertical side view of FIG. 4, FIG. 6 is a front view of the same, and FIG. 7 is a conventional spacer and its mounting manner. The main part perspective view shown in FIG. 8 is a plan view of the same. DESCRIPTION OF SYMBOLS 1... Strut leg, 2... Running roller, 3... Strut, 5... Spacer, 5a... Arc convex surface, 5d...
...Stop rotation.

Claims (1)

[Scope of utility model registration request] A viewing system in which a multi-stage movable platform is constructed by erecting columns on prop legs with running rollers at the bottom and assembling them in order to increase the height.The platform is interconnected and can be moved forward and backward by expanding and contracting. In the seat, a circular convex surface is formed on one side and a detent is protruded on the other side at the starting and ending positions of the inner and outer surfaces where the support legs face each other when moving and stopping, thereby reducing the coefficient of friction of synthetic resin, etc. 1. A spacer between support legs of a telescoping stepped spectator seat, characterized in that the spacer is made of a material with a low friction and the surface on which the anti-rotation protrudes is attached to the support leg surface.