JPH0560344U - Chair - Google Patents

Abstract

(57) [Abstract] [Purpose] Despite the use of flammable synthetic resin seat plate 2, even if dust and debris burns up on the lower floor, it immediately burns to the seat plate. The purpose of the present invention is to provide a chair excellent in fire prevention measures, which can prevent the occurrence of fire, delay the time of ignition and spread, greatly increase the evacuation time of spectators, and minimize disasters. A chair provided with a seat plate 2 made of synthetic resin and a backrest that are attached to and supported by metal legs and a metal cover plate having fire resistance is provided on at least a lower surface of the seat plate 2. Is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates mainly to a chair for a bleacher installed in a place used by an unspecified number of spectators, such as a stand in a baseball field, an athletic field, a gymnasium, or a seat in a multipurpose hall. The present invention relates to a simple chair using a board.

[0002]

[Prior Art]

 In the bleachers chairs that are arranged in large numbers on the stands and seats described above, legs with high rigidity are erected on the floor, and a seat board and a backrest are attached between the left and right legs. There are many simple types. The seat plate is of a flip-up type that automatically stands up and rotates by spring force when the seated person leaves the seat from a substantially horizontal position, and the backrest is fixed to a slightly rearward tilted position. It is common to have

Further, the legs of the chair for the bleachers are made of metal such as cast iron, but the seat plate and backrest are made of synthetic resin, which is easy to manufacture and can reduce the cost, and particularly the flammable FRP. Most of them are molded products or blow molded products made of organic materials such as polyester and polyethylene.

[0004]

[Problems to be solved by the device]

 By the way, in places such as the above-mentioned baseball field, athletics stadium, gymnasium, stands, and seats of multipurpose halls that are used by an unspecified number of spectators, waste paper such as newspapers discarded by the spectators and Styrofoam containers, etc. Since there is a risk that a fire of cigarettes will ignite the dust and the like to cause a fire, it is of course necessary to take fire prevention and fire spread prevention measures to prevent such a fire. However, fire protection measures for the chairs of the bleachers cannot be said to be complete.

That is, as described above, the seat plate or backrest of the grandstand chair is often a synthetic resin molded product such as a flammable FRP molded product or a blow molded product made of an organic material such as polyester or polyethylene. Therefore, when the dust scraps discarded on the floor below it ignite due to cigarette fire and burn up, it will burn to the nearest flammable synthetic resin seat plate from there, and from there There is a risk of spreading fire to the backrest and the chairs next to it, which could cause a big fire. On the other hand, because the seating boards and backrests of the current chairs for bleachers use the organic materials as described above, it is currently necessary to modify the materials that bring the degree of flammability to so-called noncombustibility. It is impossible with this technology.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to burn up dust and debris on the lower floor surface even though a seat plate made of a flammable synthetic resin is used. Even though it is possible to prevent immediate burning to the seat board, it is possible to significantly delay the ignition and spread time, to increase the evacuation time of the audience and to minimize disasters, providing a chair with excellent fire prevention measures To do.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the chair of the present invention has a structure in which a fire-resistant metal cover plate is provided on at least a lower surface of a synthetic resin seat plate that is attached to and supported by metal legs.

[0008]

[Action]

 According to the chair having the above-mentioned configuration, even though the seat plate made of the flammable synthetic resin is used, at least the lower surface of the seat plate is prevented even if dust and the like burns up on the lower floor surface. Since a metal cover plate with fire resistance is installed on the seat, it will not be possible for the metal cover plate to protect the seat plate from immediately burning the fire, and it will be possible to eliminate the debris naturally. Even if it is not, it takes a considerable time to ignite the seat and spread the fire, and during that time someone notices and extinguishes the fire to prevent the spread of fire, or the spectators have time to evacuate with plenty of time to minimize the disaster. Will be suppressed to.

[0009]

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, Fig. 2 shows the entire simple bleacher chairs that are installed in places such as baseball fields, athletic fields, gymnasiums, stands, and seats in multipurpose halls that are used by an unspecified number of spectators. Although a single chair is illustrated here, the same applies to a connecting chair having a plurality of seats in a horizontal row. Here, in the figure, 1 is a pair of left and right legs that also serve as side plates erected on the floor, 2 is the left and right legs 1, 1 is a seat plate that is attached in a state that it is laid horizontally in the middle of one phase, and 3 is its It is a backrest that is arranged at a position above the seat plate 2 and slightly rearward. The seat plate 2 is rotatably mounted between the left and right legs 1 and 1 via pivot shafts 5 projecting from the left and right frames 4 shown in FIG. It is of a flip-up type in which when a seated person leaves the seat, the body automatically stands up and rotates by spring force. The backrest 3 is fixed to the upper half of the rear side surface of the left and right legs 1, 1 by an appropriate means.

Here, the left and right legs 1 and 1 are made of highly rigid metal such as cast iron. The seat plate 2 and the backrest 3 are each made of a synthetic resin, particularly a synthetic resin molded product such as a flammable FRP molded product or a blow molded product (integral hollow molded product) made of an organic material such as polyester or polyethylene. . If this is left as it is, if the dust scraps thrown up on the lower floor burn up due to the fire of cigarettes, etc., the seat plate 2 will catch fire, which is a problem in terms of disaster prevention measures. Attach a metal cover plate 6 with fire resistance to the lower surface (the range from approximately the latter half of the seat bottom surface to the rear end rising surface that will be positioned below because it is an automatic flip-up type) with screws 7 or the like. It is attached. The metal cover plate 6 is formed by bending a thin iron plate or a metal plate such as an aluminum plate, and functions as a fire guard.

However, with the chair having the above-described configuration, even if dust and the like burns up on the lower floor surface, even though the seat plate 2 made of a flammable synthetic resin is used, Since the metal cover plate 6 having fire resistance is additionally provided on at least the lower surface of the seat plate 2, it is possible that the metal cover plate 6 guards the fire and the fire immediately burns to the seat plate 2. It will take a long time for the waste to be extinguished naturally, or if it is not, it will take a considerable amount of time to ignite the seat and spread the fire.In the meantime, someone will notice and extinguish the fire to prevent the spread of fire, or the audience can afford it. This will give you more time to evacuate and minimize disasters.

According to the experimental results, when a newspaper of about 300 g is placed on the floor surface directly below the center of the seat plate 2 of the chair and ignited, a conventional (current) polyethylene blow-molded chair does not. After igniting the newspaper, it spread to the lower end of the seat plate in 1 minute 15 seconds, to the lower end of the backrest in 7 minutes 0 seconds, and the seatboard and backrest burned down in about 20 minutes. In the chair having the metal cover plate 6 having fire resistance attached to the lower surface of the seat plate 2, the spread of the newspaper of about 300 g did not occur.

Although the metal cover plate 6 is provided on the lower surface of the seat plate 2 (range from the rear half of the seat lower surface to the rear end rising portion surface), the present invention is not limited to this. It may be provided on the entire lower surface of 2 or on the lower surface of the backrest 3.

[0014]

[Effect of the device]

 In the chair of the present invention, the seat plate made of synthetic resin, which is attached to and supported by the metal legs as described above, has the metal cover plate having fire resistance attached to at least the lower surface thereof. Despite being made of resin, even if dust and debris burns up on the lower floor, it can be prevented from being immediately burned to the seat plate by being guarded by the metal cover plate. This greatly delays the time of ignition and spread, increases the time for the evacuation of spectators, and minimizes disasters.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view of a seat according to an embodiment of the present invention seen from the lower rear side of a seat plate.

FIG. 2 is a perspective view showing the entire chair.

[Explanation of symbols]

1 ... legs, 2 ... seat plate, 3 ... backrest, 6 ... metal cover plate.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiyoshi Yamazaki 1-22 Yurakucho, Chiyoda-ku, Tokyo Inside Kotobuki Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A chair having a seat plate made of synthetic resin and a backrest which are attached to and supported by metal legs, and a metal cover plate having fire resistance is provided on at least a lower surface of the seat plate. A chair characterized by the fact that