JPH0734773B2 - Device for fixing the seat part of the chair - Google Patents

Description

The present invention relates to a device for fixing the seat part of a chair with an adjustable angular position, as described in the front levee part of the claims.

Several principles are known for adjusting and fixing the angular position of the seat part, especially for offices. Using a structure in which a plurality of arcuate thin plates attached to the lower side of the seat part are guided between a pair of thin plates in a retainer attached to the base part of the chair It has been known for quite some time, in which a bolt extends through a central hole in a set of lamellas and a slot in the lamellas. Fixing the seat part at a desired position is performed by clamping a plurality of thin plates and a set of a plurality of thin plates together, but in order to obtain sufficient frictional force under the force coming from the fixing mechanism. The required contact surface is
It was obtained by the width and number of lamellas on each side of the slot.

In the known embodiment, the width or the number of lamellas must be increased accordingly due to the slots in order to ensure the required friction surface for the forces that can be expected in the tightening. In addition, providing slots in the thin plate and holes in the fixed-side thin plate requires extra work in the production process. Further, in the assembly process, extra time is spent to pass the bolt through the hole in the fixed thin plate and the slot for tightening the thin plate against the fixed mating surface. No permissible manufacturing error was considered in relation to the assembly of the thin plates.

By using the fastening device according to the invention, the above-mentioned disadvantages of the corresponding known device are avoided, and furthermore, when adjusting the desired position of the sheet in the retainer or when the fastening device is in the tightening position. It is possible to adjust the position of the operation handle. These advantages are achieved by using the fixing device according to the invention with the features of the claims.

In the drawings, FIG. 1 is a sectional view taken along the line II of FIG. 3, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a side view seen from the right side of FIG. Is.

A number of thin plates 1 are attached to the underside of the seat of the chair, and a retainer 7 attached to the base of the chair.
Penetrates through. A plurality of fixed thin plates are arranged in the retainer so that all of the thin plates 1 are inserted between the fixed thin plates. The thin plates 2 are provided with recesses into which the lateral edges of the retainers 7 fit so that the fixed thin plates 2 are retained in the retainers 7. On both sides of the thin plate assembly, cup-shaped tightening shoes 3,
4 so that its annular surface abuts the fixed thin plate 2,
It is provided. Since the bolt 5 is arranged through the hole of the retainer 7 and is rotatably connected to the tightening shoe 3, by rotating the bolt 5, the tightening shoe 3 approaches or moves away from the outer thin plate 2. Be moved to. After adjusting the bolt 5 as desired with the screw 6, the bolt is fixed with a nut (not shown).

On the other side of the assembly of thin plates, a fastening shoe 4 is in contact with the thin plate 2, and a bolt 8 is detachably connected to the fastening shoe 4 and screwed into a hole of a retainer 7. This bolt 8 extends to the side of the chair, and the operating arm 9
(Not shown) is attached to the end of the bolt 8 at a location suitable for user operation. When the operating arm 9 is turned, the tightening shoe 4 is pressed against the thin plate 2.

By adjusting the bolt 5, the fixing device is adjusted to the wear of the thin plate, and the operating arm 9 is adjusted to the desired position. Similarly, bolts 5 and 8 can be adjusted to bring the lamellas in the retainer into the desired position.

Claims (1)

[Claims] 1. A plurality of thin plates (2) connected to a seat portion, extending through a retainer (7), and sandwiched between a plurality of thin plates (2) fixed and held by the retainer (7). A thin plate (1) and a first bolt (8) which is in contact with one outermost surface of the fixed thin plate (2) for fixing the seat portion and which is attached to the retainer (7) by a screw. A device for fixing a seat part of a chair in a desired angular position, the adjustable tightening shoe (4) fixed at one end, wherein a second tightening shoe (3) comprises: 8) is coaxially fixed to the second bolt (5) and abuts the other outermost surface of the thin plate (2), and the operating arm of the thin plate (1) and the first bolt (8). However, even if the thin plate is worn, the thin plate will be held in the same position. A device for fixing a seat portion of a chair, which is capable of adjusting a tightening position.