RU28811U1 - The operator's chair is universal - Google Patents

Description

KrošaGShё rda | r (universal.

The utility model relates to special furniture for equipping workstations of various highly mechanized industries.

The essence of the utility model is as follows: the chair has rigid armrests, inside of which a mechanism for changing the back angle is mounted. The back of the chair is pivotally connected to the seat bracket and can change the angle of inclination within 90-135 degrees. Changing the angle of the backrest is done by pressing it with the back of the operator. Returning to the initial position is done using the springs located under the seat of the chair. The position of the backrest is fixed by pressing on the armrests, while the arm fixing finger falls into one of the thrust holes.

New in the design of the chair is the presence of armrests with a mechanism for regulating the position of the back of the chair, which also improve its ergonomic characteristics.

There are several designs of chairs in which the back can deviate back from a vertical position, so that a person can occupy the most comfortable position.

One of them is chair 1, with a rotation drive, which provides adjustment of the position of the back of the chair relative to the fixed seat. The disadvantages of this design include: a fixed position of the chair in one place in order to give it

stability, the presence of a rotation drive, complicating the design, the absence of armrests, reducing the ergonomics of the chair.

Known adjustable chair 2 with variable positions of the back and seat. The main disadvantages of this design are: the fixed position of the chair in one place, the chair is mounted on the foundation due to the displacement of the center of gravity of the person in it relative to the base; unreliable construction due to the lack of a rigid connection between the base, seat and back; lack of armrests and footrests, which reduces the ergonomics of the chair.

The closest technical solution is the working chair 3, containing a support, a base with a footrest, a seat with a height-adjustable and unregulated backrest. The disadvantages of this design are: unregulated position of the back, insufficient height of the back and the absence of armrests that do not allow a person to take a comfortable position with monotonous long work. These shortcomings significantly reduce the ergonomic design.

The purpose of the utility model is to improve the ergonomic and structural characteristics of the chair.

This is achieved by the fact that the armrests are provided in the design of the chair, inside of which there is mounted a mechanism for adjusting the angle of the backrest using rods pivotally connected to the back of the chair, which are moved along the guides in the armrest bodies.

A universal operator’s chair (Fig. 1, Fig. 2) contains a base 1 with four support legs. The support posts are located at an angle of 35 degrees to the vertical axis, the base distance between the posts is 500 mm. This design of the base gives the chair stability. A cast iron nut 10 with a trapezoidal thread is pressed into the cylindrical base case. A screw 9 is screwed into the nut, on which the operator seat 6 is fixed. Screw 9 allows you to adjust the height of the seat and allows the chair to rotate 360 degrees around the vertical axis.

The brackets are welded into the support legs of the chair, through which the axis of rotation of the footrest 2 passes.

On the rigid racks 4, the armrests 3 are attached, inside which rods with holes for adjusting the angle of inclination of the back of the chair are placed. The rods are pivotally connected to the back of the chair. The back of the chair 5 is pivotally connected to the seat bracket. The arms of the armrests are made of wood and pivotally connected to the armrest body. On the back of the handles there are finger-fixers.

Adjusting the position of the back of the chair is carried out by lifting the folding handles and simultaneously pressing the back of the chair with the back of the operator. Having set the optimal angle of the backrest, the handles are pressed to the armrests body, combining the locking pin with one of the holes

adcio m e b

traction. Return to the initial position is carried out using springs 7 moving along the guides 8 located under the operator's seat. To do this, raise the arms of the armrests without pressing on the back of the chair. When changing the angle of inclination of the backrest changes the angle of the armrest.

This design of the chair allows the operator to take a comfortable position during operation, to adjust the angle of the backrest, without losing sight of the working space and without getting up from the workplace.

The simplicity of manufacture and the availability of materials for assembly, allow the production of chairs directly in the production units where they will be operated, with minimal labor and material costs.

The manufacture of armchairs in the production units of Volzhsky Pipe Plant OJSC made it possible to improve working conditions for workers and replace worn chairs with new ones without significant financial costs.

 USSR patent No. 1665863.

 USSR patent No. 1773232.

 USSR patent .№ 1787427.

Claims (1)

The operator’s seat is universal, including a support, a height-adjustable seat, a back with a varying angle of inclination, characterized in that the mechanism for changing the angle of inclination of the backrest is mounted in the armrests.