Method for manufacturing of upholstered mass transit vehicle chairs

Abstract

A method of method of manufacturing an upholstered chair for a mass transit vehicle includes forming a seat insert and a backrest insert, injection molding a layer of upholstery having enveloping flanges and beads at a periphery thereof, placing the upholstery onto the seat and backrest inserts such that the flanges and beads engage with an underside of the inserts, and attaching the seat insert and the backrest insert onto a chair frame. The flanges and beads secure the upholstery to the seat and backrest insert.

Claims

1. A method of manufacturing an upholstered chair for a mass transit vehicle, the method comprising: forming a seat insert and a backrest insert, each of the seat insert and the backrest insert having a underside; injection molding a layer of upholstery from a plastic material such that the layer of upholstery has enveloping flanges at a periphery thereof, each of the enveloping flanges having a bead at an edge thereof; placing the injection molded layer of upholstery onto the seat insert and the backrest insert such that the enveloping flanges and the beads are at the underside of the seat insert and the backrest insert such that the injection molded layer of upholstery is securely retained in position against the seat insert and the backrest insert; and attaching the seat insert and the backrest insert onto a chair frame after the step of placing.

2. The method of claim 1, further comprising: placing an elastic layer between the layer of upholstery and the seat insert and the backrest insert.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The subject of the invention, in an example, but not limiting, implementation was presented in diagrams on the figure, where on

(2) FIG. 1 the chair was shown with upholstery spread out, on

(3) FIG. 2 the seat was shown in a cross-section perpendicular to its lengthwise axis, on

(4) FIG. 3 the enlarged fragment B from FIG. 2 was shown.

DETAILED DESCRIPTION OF THE INVENTION

(5) The external layer of upholstery 1 is manufactured by injection from elastic plastic, advantageously PVC. The injection process also shapes the enveloping flanges 2. The created cast profiles are placed over the insert 3 of the seat 4 and backrest 5, after which the seat 4 and backrest 5 are mounted to the frame 6 of the chair. Enveloping flanges 2 have beads 7 on the edges.

(6) The upholstery 1 created through the injection of elastic plastic has enveloping flanges 2 for placing on the surface of the insert 3 of the seat 4 and backrest 5.

(7) During the installation of the seat 4 or backrest 5, the upholstery 1 is placed on the insert 3, so that the flanges 2, due to their elasticity, are placed on the bottom side of the insert 3 of the seat 4 and backrest 5. The initial stabilisation of the upholstery on the inserts 3 of the seat 4 and backrest 5 will occur. Then such placed seat 4 and backrest 5 are placed in the recess of the frame 6 of the seat in such a manner that the contacting edges of the backrest 5 and seat 4 clamp down on the flanges of the rear zone of the seat 4 and the bottom zone of the backrest 5, after which the seat 4 and backrest 5 are mounted to the frame 6 in a known manner. The beads 7 are placed under the inserts 3, preventing the sliding out of the upholstery from the insert 3 of the seat 4 and backrest 5, whereas in the zone of contact of edges of the seat 4 and backrest 5 the beads 7 of the seat 4 and backrest 5 are locked in the gap between the seat 4 and the backrest 5.

(8) A permanent locking of the upholstery in the frame 6 of the chair is thus obtained.

(9) There are also versions where between the upholstery 1 and the insert 3 there is a layer of foam 8.