JPS6345962Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of a plurality of seat units consisting of a seat plate body integrally formed with a seat part and a tread part, and a pair of left and right legs, arranged telescopically and retractably. This invention relates to a seating device that forms a stepped audience seat when in use, and can be stored by stacking vertically when not in use.

This type of seating device is placed in front of fixed spectator seats as auxiliary seats, or is usually used as temporary spectator seating on the horizontal floor where competitions are held, so it does not take up much space when not in use. Each seat unit is formed so that it can be stacked together in a telescoping manner, so that it can be stored in a large space, the seats can be quickly set up during use, and they can sufficiently withstand the audience load after the seats have been set up. Rollers are attached to the lower surfaces of the pair of legs on the left and right of the body, and the seat plate body whose rear edge is fixed to the front side of the middle part of the pair of legs does not cantilever support against the legs when setting the seat. Thus, the front part of the seat plate body is placed in contact with and supported by the upper end of the leg body of the seat unit body located in the previous stage.

By the way, if each seat unit of the seat system is arranged in a nested manner in this way, and the front lower surface of the rear seat plate is placed in contact with the upper end of the front leg, the By attaching rollers to the upper end, the front legs and the rear seat plate can smoothly contact each other. Therefore, it is natural that there will be some distortion in the floor configuration, and when installing the seat system on a wide area floor with some distortion, it is necessary to In this case, the distance between the upper end of the front leg and the lower front surface of the seat plate at the rear end is different.

In other words, when the installation surface of the front seat unit is higher than the installation surface of the rear seat unit, the legs of the front row will push up the seat plate of the rear row, making it difficult to move smoothly during storage. occurs.

Therefore, in general, the configuration is such that there is a slight gap between the upper end of the front leg and the rear seat plate, but if you sit on the seat surface of the rear seat plate in this state, the seat The load applied to the plate body acts on the attachment part between the seat plate body and the vertical leg part of the leg body in a state of cantilever support, and bending stress acts on the vertical leg part of the leg body. There is a risk of mechanical damage to the lower end of the vertical leg or deformation of the leg body.In particular, the longer the length of the vertical leg, the greater the bending stress that acts on the vertical leg, causing damage and member deformation. The degree of deformation also increases.

In view of this, the present invention is designed to reduce the bending stress acting on the vertical legs of the legs by configuring the legs to tilt forward as a whole in the seated state regardless of the condition of the floor surface on which the seat device is installed. By doing so, the defects of the conventional method have been improved.

That is, the present invention nests a plurality of seat units each consisting of a seat plate and a pair of left and right legs, each consisting of a horizontal base with ground rollers at the front and rear, and a pair of vertical legs. In the seat device arranged in a stair-like manner in a telescopic manner, the ground roller at the front position of the horizontal base is constituted by a roller having a large elastic force, and the ground roller at the rear position is constituted by a rigid roller. That is.

An embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 [1a, 1b, 1c...] indicates the entire seat unit body, and 2 is a seat plate body, which has a seat part 2a having a U-shaped cross section in the front half, and a lower surface of this seat part 2a. The tread portion 2b is integrally formed by extending in the horizontal direction. Reference numerals 3 and 3' denote a pair of left and right legs, which are formed into a substantially L-shape by vertical legs 3a, 3a' and horizontal bases 3b, 3b', and a seat plate is provided on the front side of the middle part of the vertical legs 3a, 3a'. The body 2 is horizontally fixed at the rear edge of its tread portion 2b by brackets 4, 4'. Further, the vertical legs 3a, 3a' of the legs 3, 3' are formed of square tube steel, and rollers 5, 5' have part of their peripheral surfaces protruding upward from the upper end openings thereof. The horizontal bases 3b, 3b' are formed of a downward U-shaped channel steel material, and the outer peripheral parts 7a, 7a' are made of flexible elastic material such as rubber material on the front lower surface side. The grounding rollers 7, 7' made of a material with high elasticity are shaft-mounted by shaft bolts 8, 8' and nuts 9, 9' so that at least a part of the outer peripheral parts 7a, 7a' protrudes from the lower surface. However, even if there is a rigid body or elasticity on the rear lower surface side, the grounding rollers 10, 10', which have very small elasticity, are mounted on the shaft in the same way as the front grounding rollers 7, 7' so that a part of their outer circumference protrudes from the lower surface. It is attached by bolts and nuts.

A plurality of seat units configured in this manner are formed with steps. That is, by sequentially changing the gap between the legs and the overall height including each roller, each seat is arranged so that the front leg fits within the space formed by the rear leg and the seat body fixed to the rear leg. In addition to forming a unit body, the height of the front legs 3, 3' is made slightly lower than the height up to the rear seat plate 2, that is, the upper end roller of the front legs 3, 3' in the normal state. Each seat unit body 1 is formed so that a slight gap a is created between the seats 5 and 5' and the rear seat plate body 2.

By sequentially arranging the plurality of seat units configured as described above on the installation floor F, the front seat units can be smoothly moved in a nested manner relative to the rear seat units, Even if the installation floor is warped, there is a gap between the upper end of the legs of the front seat unit and the seat plate of the rear seat unit, so there is no problem with telescopic movement. In addition, if the load is applied to the front of the seat plate while the seat is seated with this gap increased due to distortion of the installation floor, the ground rollers at the front of the legs will have a large amount of elasticity. Since the grounding roller is crushed and deformed, the seat unit body is tilted forward, and the seat plate body is placed in contact with the upper end of the front leg body via the roller, The seat plate body is supported in a stable state, and almost no bending stress is applied to the vertical leg portions of the leg bodies.

As described above, according to the present invention, each seat unit in a telescopic seat device can be smoothly moved in a telescopic manner without any hindrance even if the installation floor is distorted, and it can be extended in a step-like manner during use. It is easy to shorten the overlap when not in use, and when seated in a stepped state, the load does not apply bending stress only to the legs as in the conventional case, and the seat unit as a whole tilts forward. The seat plate body is supported by the legs of the previous stage to form a stable seat, and since no large bending stress is applied to the legs, there is no risk of deformation of damaged parts, and the seat plate body is able to withstand long-term use. It has practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially omitted perspective view of an example of the seat device according to the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a partially omitted view of the same essential parts. FIG. In the figure, 1 is the seat unit, 2 is the seat plate, 3, 3'
are leg bodies, 7, 7' are front ground rollers, 7a, 7
a' is a flexible elastic outer peripheral portion, and 10 and 10' are rear ground rollers.

Claims (1)

[Scope of Utility Model Registration Claim] (1) A plurality of seat units consisting of a seat plate body and a pair of left and right leg bodies each consisting of a horizontal base having front and rear ground contact rollers and vertical legs erected thereon. In a seat device in which bodies are telescopically arranged in a stair-like manner, the grounding roller at the front position of the horizontal base is constituted by a roller having a large elastic force,
A seat device characterized in that a ground roller at a rear position is constituted by a rigid roller. (2) The seat device according to claim 1, wherein the ground roller at the front position has a flexible elastic material on the outer periphery.