JPH0314522Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an earthquake-resistant floor support device for telescoping staircase-like bleachers.

[Conventional technology]

The construction of public buildings that can be used for multiple purposes is a recent trend.

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. This spectator seat is formed by interconnecting a movable floor structure with a plurality of stages of increasing height so that it can be moved by expansion and contraction in the front and back direction. When the bleachers are in use, they are pulled out in sequence starting from the lowest movable floor structure at the front, and the entire structure is extended into a dais-like structure, thereby making it possible for a large number of spectators to sit on the chairs of each movable floor structure. When not in use, the entire structure is placed under the highest movable floor structure in the form of a vertical shelf by moving backwards from the first movable floor structure to the rear movable floor structure. Conventional seats of this type are designed to be reduced in size and stored in storage recesses provided on the wall of the building.Although not shown, conventional seats of this type are A support roller was provided on the upper part of the cross member in each stage on which the arm on the rear stage side was placed. Therefore, when the movable bed structure of each stage moves forward or backward, this support roller rolls using the arm on the rear stage side as a guide, thereby making it easy for the movable bed structure of each stage to move back and forth. It was configured to be.

[Problem that the invention attempts to solve]

Due to the above configuration, the conventional bleachers had the following problems.

(1) If the movable floor structure were to shake due to an earthquake or the like when the bleachers were in use, there was a risk that the arm located at the bottom of the movable floor structure would fall off to the side from above the support roller located directly below it. .

(2) In addition, when each movable floor structure moves forward and backward, each movable floor structure may not always move in a straight line, so in order to maintain the direct movement of each movable floor structure, accessory equipment such as an alignment wire device is used. It was set up.

[Means for solving problems]

This invention solves the problems of the prior art described above. In other words, the purpose is to prevent the arms from falling off the support rollers even if an earthquake or the like occurs when the seats are in use, and to allow the extension and contraction of the seats to be performed without the need for other alignment wire devices, etc. To provide a floor support device for retractable staircase-like bleachers that can be smoothly and precisely carried out. The feature of this invention is that a support is erected on a base equipped with running rollers, and a cross member with support rollers is installed on the upper front of this support, and then the later side cross member is placed on top of this cross member. A viewing seat that can be moved forward and backward by expanding and contracting by interconnecting a movable floor structure consisting of a plurality of stages, each of which has an arm protruding from the support roller placed on the support roller and assembled in such a way that the height increases in sequence. Then, a pair of side stoppers are symmetrically fixed on the horizontal member at a position adjacent to the side of the support roller, facing the left and right arms on the rear stage side, and the left and right arms on the rear stage side are fitted from the side. This allows it to be retained.

[Effect]

With the above configuration, when the bleachers are in use, the movable floor structure of each tier has been reduced to a vertical shelf below the movable floor structure of the highest tier. The entire structure is extended into a pedestal shape by sequentially pulling it out from the top, but at that time, the side stopper is designed to fit and hold the rear arm at the adjacent position from the side, so the support rollers at each stage will not come off from the arm. I can walk straight straight without any problems. Furthermore, even if, for example, an earthquake occurs when all of the movable floor structures are extended into podiums and used as spectator seats as described above, the movable floor structures of each stage will remain on the support rollers located directly below them. The rear arm is
Since it is supported from both sides by a pair of side stoppers in each stage, it is possible to reliably prevent the arm from falling off the support roller due to the rolling movement of the movable bed structure. Furthermore, when the movable floor structure is moved backward to store the seats in their rear positions after the use of the seats, the support rollers of each stage are moved from both sides by the side stoppers. Since it is supported, normal retraction is possible along this arm, thereby allowing the entire stage of the moving bed structure to be reduced with precision without the need for accessory equipment such as alignment wire devices.

〔Example〕

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

First, to explain the configuration, as shown in FIGS. 1 to 4, each movable floor structure B has a plurality of stages increasing in height (a floor plate (not shown) is laid on an arm 6 (to be described later), is a floor structure for installing bleachers, chairs, etc. and making it into a movable platform).
In order to connect each other and expand and contract in the front and back direction,
A running roller 2 is provided at the bottom, and a support 3 is installed at the top.
A cross member 4 on which a support roller 5 is mounted is installed at the front position of the cross member 4, and an arm 6 protruding from the rear side (upper stage side) cross member 4 is placed on the support roller 5. As the height of the floor structure B increases in each stage, each base 1 formed as shown in FIG. In some cases, all the stages are extended into a pedestal shape by sequentially pulling out the movable floor structure B from the first stage onto the floor C in front of it using a drive machine (not shown) such as a motor placed on a part of the base 1. A large number of spectators can sit on the viewing chairs of each movable floor structure B, and when not in use, contrary to the above, the first movable floor structure B is moved back to the bottom of the highest movable floor structure B. The above-mentioned seats, excluding the highest stage, are assembled into a vertical shelf under a reduced body, and the seats in this state can be stored in a storage recess (not shown) behind the seats. Cross member 4 installed on the front of the upper part of column 3
A floor support device, which will be described later, is installed on the upper surface adjacent to the support roller 5, which is mounted so as to be in sliding contact with the rear arm 6 from below and move forward and backward using the arm 6 as a guide. .

The following lower locking device is provided on the base 1 at the intersection of the base 1 and the pillar 3 of each stage. That is, as shown in FIG. 1, the lock cam 7, which is the main part of this locking device, is formed into a V-shape with a narrow rear base end and a bifurcated front end. The lock cam 7 is loosely fitted onto a pin 7a inserted into the support column 3 from the base end so as to be vertically swingable. Therefore, when the bleachers are extended, and the forward movement is started sequentially from the base 1 at the front stage, the lock cam 7 on the front stage is lowered by its own weight to the stopper metal fitting 1a attached to the tip of the base 1 at the next stage. The bases 1 are formed so as to be engaged with each other, so that the adjacent bases 1 are integrally connected to each other and cannot be moved back.

The floor support device according to the above is constructed as follows. That is, as shown in FIGS. 1 to 4, this floor support device is composed of a side stopper 8, an adjustment bolt 9, and a front stopper 10. First, the side stopper 8 is made by bending a band-shaped metal plate into a U-shape in plan view, and has a bolt hole (not shown) penetrated through the upper vertical surface of one side that does not face each other. The pair of left and right side stoppers 8 according to this embodiment are located on the upper surface of the crosspiece 4 adjacent to the support roller 5, and are placed on the upper surface of the crosspiece 4 adjacent to the support roller 5, so that the outer part is as close as possible to the limit where it does not come into sliding contact with the rear arm 6 placed on the upper part of the support roller 5. It is fixed at a side position via means such as welding so that one side with the bolt hole is located at the front part. In this case, since the pair of side stoppers 8 are fixed at external side positions as close as possible to the limit where they do not come into sliding contact with the arm 6 on the rear stage side, the left and right arms 6 on the rear stage side are held by the pair of side stoppers 8 from both sides. It will be in the mated state. Therefore, even if the movable floor structure B shakes horizontally due to an earthquake or the like, the arms 6 at each stage are configured to maintain a stable placement without falling off the support rollers 5 at the positions immediately below.

In addition, an adjustment bolt 9 is inserted into a bolt hole (not shown) penetrated through the upper vertical surface of one side of the side stopper 8 that does not face each other, and is screwed into the threaded portion of the side stopper 8 using the inner and outer surfaces of the side stopper 8 as supports. By tightening the double nuts and adjusting the amount of protrusion, the bolt head comes into contact with the front stopper 10 (described later), thereby regulating the amount of movement of movable floor structure B that has advanced to a specified position and holding it fixed at that position. are arranged to ensure that

Furthermore, when the moving bed structure B on the lower stage side (previous stage side) moves forward by a specified amount of advance on the outer side surface of each of the above-mentioned arms 6 on the rear stage side except the first stage, each lower stage is at the limit position of the forward amount. In order to fixedly stop the movable floor structure B on the side, a front stopper 10 made of a U-shaped plate is installed at the position where the adjusting bolt 9 of each stage moves forward and stops. It is fixedly arranged by means such as welding in a state where it can be connected, and the whole is composed of a floor support device for a retractable staircase-like audience seat.

With the above configuration, the side stopper 8 with the adjustment bolt 9 on the cross member 4 installed on the front surface of the upper part of the support column 3 except the highest stage, and the side stopper 8 with the adjustment bolt 9 on the cross member 4 installed on the front surface of the upper part of the support column 3 except the highest stage, and the side stopper 8 on the side of the rear stage side arm 6 which the cross member 4 reaches by moving forward. Front stopper 10
When using bleachers equipped with a floor support device, first, a drive device (not shown) such as a motor is used to
Until then, the seats in the state where the movable floor structure B of each tier had been reduced to a vertical shelf below the movable floor structure B of the highest tier will be moved sequentially from the nearest movable floor structure B to the floor C in front of it. It is pulled out onto the surface and extended as a whole into a pedestal shape as shown in part in FIG.
A pair of side stoppers 8 are fixedly installed adjacent to the support rollers 5 of each stage, and these side stoppers 8 fit into the left and right arms 6 on the rear stage side from the outside of both sides. Therefore, the support rollers 5 at each stage can normally move straight without coming off the arm 6 on the rear stage side, which is in sliding contact with the support roller 5 at the position directly above it.

In addition, when all the movable floor structures B are extended like podiums and used as spectator seats as described above, even if the seats shake horizontally due to an earthquake, for example, the movable floor structures B of each stage will be moved to the position directly below it. The rear arm 6 resting on the support roller 5 is supported by a pair of side stoppers 8 for each stage in a state as close as possible to the limit where it does not come into sliding contact with the audience. The arm 6 is reliably prevented from falling off the support roller 5.

Furthermore, when each movable floor structure B is moved backward to return to its original position in order to store the seat in its rear position after the use of the seat is finished, the support rollers 5 of each stage are moved directly above the seat. Since the rear arm 6 located at the rear stage is supported by a pair of side stops 8 so as to fit from both sides, normal retraction is possible along this arm 6, and thereby the entire The movable floor structure B of the stages can be reduced accurately and smoothly without requiring any accessory equipment such as an alignment wire device.

In the above embodiment, the side stopper 8 with the adjustment bolt 9 and the front stopper 10 are arranged on the outside sides of the left and right arms 6 in each stage, but the floor support device according to this invention is different from the above embodiment. For example, without limiting the example, the left and right arms 6 in each stage
Even if it is placed on the inside side, the same operation and effect as shown in the above embodiment can be obtained.

[Effect of idea]

This idea consists of setting up a support on a base with running rollers, installing a cross member with support rollers on the upper front of the support, and then attaching an arm protruding from the later cross member to the cross member. A spectator seat that can be moved by expanding and contracting in the front and back direction by interconnecting a movable floor structure consisting of a plurality of stages mounted on the support rollers and assembled so as to increase in height, the seats being able to move by expanding and contracting in the front and back direction, A pair of side stoppers are fixed symmetrically on the horizontal members adjacent to each other, facing the left and right arms on the rear stage side, so that the left and right arms on the rear stage side can be fitted and held from the side. It is characterized by this. Therefore, even if the seats shake horizontally due to an earthquake or the like when the seats are in use, the arm will surely be prevented from falling off the support rollers, and the extension and contraction operations of the seats will not require any other alignment wire device. Since this can be done accurately and smoothly, the safety of this type of bleachers can be further improved, and the cost of installing the other alignment wire devices mentioned above can be reduced, leading to a significant reduction in the cost of bleachers. There are effects such as being able to.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view of the base of the bleachers equipped with the floor support device according to this invention when it is extended, Fig. 2 is a rear view showing the floor support device in section A of Fig. 1, and Fig. 3 is the same. The plan view and FIG. 4 are side views of the same. 1... Base, 2... Running roller, 3... Support column,
4... Cross member, 5... Support roller, 6... Arm,
8... Side stopper, B... Moving floor structure.

Claims (1)

[Scope of utility model registration request] A support is erected on a base equipped with running rollers, a cross member with support rollers is installed on the upper front side of this support, and an arm protruding from the adjacent rear cross member is mounted on the cross member as described above. The spectator seat is placed on a support roller and assembled so as to increase in height in order to be movable telescopically, and a pair of side stoppers are installed at a later stage on a horizontal member at a position adjacent to the side of the support roller. A floor support device for an extendable staircase-like bleacher seat, characterized in that it is symmetrically fixed opposite to the left and right arms on the side, and the left and right arms on the rear side can be fitted and held from the side.