JPS6312764Y2 - - 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 normally used as temporary spectator seating on flat floors where competitions are held, so it does not take up much space when not in use. In addition, the seats can be quickly set up during use, and after the seats are set up, each seat unit is formed so that it can be stacked in a telescoping manner to withstand the audience load. Rollers are attached to the lower surfaces of the pair of left and right legs, and the seat plate whose rear edge is fixed to the front side of the middle part of the pair of legs is designed to prevent cantilever support from the legs when setting the seat. In addition, the front part of the seat plate is placed in contact with and supported by the upper end of the leg of the seat unit located in front of the seat plate.

However, if each seat unit of the seat device 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 leg By attaching rollers to the upper end, the front leg and the rear seat plate can smoothly contact each other, but the floor surface on which this seating device is installed, such as the floor of a stadium, etc., must be completely dry. rather than a horizontal plane,
When installing the seat system on a wide floor surface with some distortion, the distance between the upper end of the front leg and the lower surface of the rear seat plate between each seat unit. will be 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 when storing. Conversely, when the installation surface of the front seat unit is low, the upper end of the front leg is separated from the bottom surface of the rear seat plate, and the front seat plate is attached to the rear leg. In this state, when sitting on the seat surface of the rear seat plate or walking on the seat plate, a load is applied only to the mounting part, which may cause damage. A large bending stress acts on the legs of the latter stage to which the legs are attached, which may cause the legs to deform or break.
There are inconveniences associated with the condition of the installation floor surface, and these inconveniences also occur at the left and right positions of the seat unit.

In view of this, the present invention has been developed by adjusting the gap between the upper end of the leg of the front seat unit and the lower surface of the seat plate of the rear seat unit when each seat unit of the seat system is expanded and contracted. This allows the body to move smoothly in response to the distortion of the floor surface on which it is installed.

That is, the present invention arranges a plurality of seat units, each having a different height, in a telescoping manner in a telescoping manner in a stair-like manner, in which a seat plate is horizontally attached to the front side of the middle part of a pair of left and right legs. In the seat system, a receiving roller is provided at the upper end of the leg of each seat unit, and the shaft of this receiving roller is supported, and the support position is variable in the vertical direction. Each cam body is rotatably fixed to the upper end of the leg body, and a plurality of recesses corresponding to different support positions are formed on the outer periphery of the receiving roller. The shaft is received in an elongated hole adjacent to the shaft stop portion of the cam body, and one of the recesses of the cam body is configured to support the shaft of the receiving roller in the elongated hole. That is.

An embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 indicates the entire seat unit, and 2
is a seat plate body, and the front half has a seat surface part 2a with a U-shaped cross section.
A tread surface portion 2b is integrally formed by extending the lower surface of this seat surface portion 2a in the horizontal direction.
3, 3' are a pair of left and right legs, and vertical legs 3a, 3
a' and horizontal bases 3b, 3b', the seat plate body 2 is formed on the front side of the middle part of the vertical leg parts 3a, 3a', and the seat plate body 2 is connected by brackets 4, 4' at the rear of the tread part 2b. fixed horizontally.

Also, the vertical legs 3a, 3 of the legs 3, 3'
a' is formed of a square tube steel material, and receiving rollers 5, 5' are disposed within the upper end opening thereof. The shafts 6, 6' of the receiving rollers 5, 5' are connected to the vertical legs 3a, 3'.
Long holes 7 formed in the vertical direction on the left and right sides of a′,
It projects outwardly through 7'.

Also, on the left and right sides of the upper end opening, this receiving roller 5,
5', cam bodies 8a, 8b, 8a', 8b' are located below both protruding ends of the shafts 6, 6', and the vertical legs 3a,
A support shaft 9 that penetrates through 3a' and is rotatably supported,
The supporting shafts 9, 9' are fixed to the vertical leg portions with fasteners 10, 10' such as nuts. The peripheral surface of the cam body is provided with the receiving rollers 5, which are arranged at different distances from the fixed support portion of the cam body.
5', a plurality of recesses 11 ₁ to 1 that support the shafts 6 and 6'
1 ₃ is formed, and by loosening the stopper and rotating the cam body to select the recesses corresponding to the shafts 6, 6', the vertical positions of the receiving rollers 5, 5' can be variably adjusted.

On the other hand, the horizontal bases 3b, 3b' of the legs 3, 3' are formed of channel steel with a U-shaped cross section, and the front and rear portions are provided with grounding rollers 11, 11' and 12,
12' is pivoted by shaft bolts 13, 13' and 14, 14' so that a portion thereof protrudes from the lower opening.

A plurality of seat units configured in this manner are formed with different heights. That is, the legs 3,
Each seat unit body is formed by changing the interval 3' and the overall height so that the front stage leg body is accommodated in the space formed by the rear stage leg body and the seat plate body attached to the rear stage leg body. These plural seat units 1a, 1
b, 1c... are arranged one after another on the installation floor F, and when in use, they are extended and moved in a step-like manner, and when not in use, they are moved as a whole so that the ones in the front are inside the ones in the rear. Move shortened and store sequentially. By this telescopic movement operation, if the gap between the front receiving rollers 5, 5' and the rear seat plate 2 in the no-load state is large, the receiving rollers are rotated by rotating the cam bodies 8a to 8b'. 5, 5' upward, and without the above-mentioned gap, the receiving rollers 5, 5' of the previous stage are pushed upward.
When pushing up the rear seat plate 2,
By rotating the cam bodies 8a to 8b', the receiving rollers 5,
5' is lowered, and this operation is also performed at the left and right positions of the seat unit, so that the front and rear seat units can expand and contract without any trouble regardless of the presence of distortion in the floor surface, and the front receiving roller 5 , 5' and the rear seat plate body 2 are adjusted as much as possible to support the receiving rollers 5, 5'.
This makes it possible to reduce rattling of the seat plate body 2 and bending stress acting on the legs when a load is applied.

As described above, according to the present invention, the receiving roller, which is attached to the upper end of the leg of the seat unit in order to roll into contact with and support the lower surface of the rear seat plate, can be adjusted to be vertically movable using the cam body. As a result, the seat unit can be extended and retracted smoothly, and the bending stress acting on the legs during use can be reduced, making it highly durable and providing stable support. has advantages.

[Brief explanation of drawings]

FIG. 1 is a partially omitted perspective view of an example of a seat device according to the present invention, FIG. 2 is a side view of the same, FIG. 3 is a front view of the main part, and FIG. 4 is a side view of the same partially cut away. In the figure, 1 is the seat unit, 2 is the seat plate, 3, 3'
are leg bodies, 5 and 5' are receiving rollers, 6 and 6' are shafts, and 8
a, 8b, 8a', 8b' are cam bodies, 9, 9' are support shafts,
10 and 10' are stoppers, and 11 ₁ , 11 ₂ and 11 ₃ are recesses.

Claims (1)

[Scope of utility model registration request] Each seat in a seating system in which a plurality of seat units, each having a different height, are telescopically arranged in a stair-like manner in which a seat plate is horizontally attached to the front side of the middle part of a pair of left and right legs. A receiving roller that is in rolling contact with the lower surface of the rear seat plate body and a cam body that supports the shaft of this receiving roller and variably adjusts the supporting position in the vertical direction are provided at the upper end of the leg of the unit body. The cam body is rotatably fixed to the upper end of the leg body, and a plurality of recesses corresponding to different support positions are formed on the outer periphery, and the shaft of the receiving roller is attached to the cam body. A seat device, wherein the seat device is received in an elongated hole adjacent to a shaft stop portion of the cam body, and one of the recesses of the cam body is configured to support the shaft of the receiving roller in the elongated hole.