DE19918019C1 - Folding seat for public service vehicle - Google Patents

Abstract

The invention relates to a folding seat of the type preferably used for spare seats in public transport vehicles. When not in use such folding seats automatically fold back into an upright position by means of a return spring (6) mounted on a shaft (16). Owing to fatigue or breakage said restoring spring (6) occasionally has to be replaced. In the folding seat provided for in the invention the spring-supporting shaft (16) consists of two parts (4, 5) which are positioned at an axial distance in relation to each other and rigidly joined by means of a removable sliding element (15). By detaching and sliding said sliding element the spring can be changed without the need to disassemble the folding seat. The invention also makes it possible to transform existing folding seats with only minimal effort.

Description

The invention relates to a folding seat, which is used as an emergency or reserve seat in public transport, in particular re in rail vehicles, is used. Passenger cars or local and long-distance railcars often have via so-called payload or bicycle compartments. In particular in such compartments as well as in corridors or niches by attaching foldable emergency seats to the seat bid increased. So that the seats of the folding seats only in a horizontal position when in use, works the seat in the unloaded state by spring force automatically into a vertical one against the vehicle wall Position.

With the folding used preferably at home and abroad sit is the seat frame carrying the seat surface by means of Bearing bushes pivotally mounted on a shaft, the Shaft rotatably fastened in two to the vehicle wall Consoles is stored. On the wave is one as a winding Bending spring designed return spring pushed in the middle, whose radially protruding spring legs are on the seat frame support the arranged stops. There is an eyelet in the middle of the spring trained, in which also shot onto the shaft benes twistable and lockable clamping piece engages where  by the torque generated by the return spring the vehicle wall is transferred. By twisting and fixed set the clamping piece is such a spring preload set that the seat when not in use vertical position works and holds securely there.

DE 43 24 882 A1 describes a generic folding seat wrote, in which the spring shaft is rotatable. Two slide-on return springs support themselves with their ra Dial protruding spring legs on the one hand on the shaft arranged clamping pieces and on the other hand on the wall attached consoles.

If the return springs are used for a long time, Folding seats are no longer sufficient due to fatigue tension or broken, they must be replaced.

All known generic folding seats have the disadvantage that to change a return spring in most cases the entire folding seat can be removed from the vehicle wall must, because to change the return spring, the spring shaft can be pulled out of the side of the consoles. But since usually several folding seats next to each other or close together side vehicle walls, for example in niches, arranged net, this is rarely possible when attached. Dar this results in an enormous amount of work to change the Return springs.

The invention is therefore based on the object of a gat to create proper folding seat, in which the replacement the return spring with significantly less work is possible. The solution according to the invention must also be added later Realizable by converting conventional folding seats be, with only minor design changes necessary may be.  

This task is accomplished by a folding seat with the features of claim 1 solved.

The advantages of the invention are in particular that a replacement of the return spring without dismantling the spring shaft and thus take place without dismantling the entire folding seat can. In addition to the significantly reduced workload advantageous from the fact that the padding of the built folding seat no longer by dropping or transport in a workshop can be contaminated or damaged. The embodiment of the invention according to claim 2 allows Retrofitting more conventional with little effort Folding seats without structural changes to the actual seat frame must be made. Because with these folding seats Parts of the existing spring shaft can be reused nen, the cost of materials for retrofitting is extremely ge ring. The connection of the shaft parts by a sleeve commercial semi-finished product according to claim 3 is cost inexpensive and requires only minor processing of the existing spring shaft.

An embodiment of the invention is in the drawings shown and will be described in more detail below.

Show it:

Fig. 1 is a plan view of a folding seat

Fig. 2 shows the view of a complete spring shaft

The folding seat shown in Fig. 1 in the position of use, that is, with a horizontal seat 1 , consists essentially of the brackets 3 screwed to a wall and the seat frame 2 pivotally mounted therebetween on the spring shaft 16 , on which the actual seat 1 is fastened is. A seat cover, not shown, is screwed below the seat frame. The consisting of the shaft parts 4 and 5 and the sliding piece 15 formed as a sleeve de spring shaft 16 ( Fig. 2) is mounted in the brackets 3 against rotation. For this purpose, a flange 13 with cams is formed on the left end of the shaft part 4 , which engage in corresponding recesses in the left console 3 . The right Wel lteil 5 is screwed by the screw 12 to the right console 3 . The shaft parts 4 and 5 are axially clearly spaced apart and rigidly connected in this area by the sliding piece 15 with screws 9 . To the left of the sliding piece 15 , the return spring 6 , which is designed as a spiral spiral spring, is pushed onto the left shaft part 4 . The radially spaced spring legs 14 of the return spring 6 are supported there at stops on the seat frame 2 .

The exemplary embodiment shown is a retrofitted conventional folding seat. This has been formed on the back of the chair main body 2 stops 10 and 10 a, to which the originally centrally disposed return spring 6 braced. According to the solution according to the Invention, the return spring 6 can be supported with its right spring leg 14 on the existing stop 10 , so that no structural changes need to be made in this regard. The left spring leg 14 , however, is supported on an additional and loosely inserted stop 11 . The stop block 11 has a threaded bore and replaces a threaded piece originally arranged at this point 11 for fastening the lower seat cover. The stop block 11 can be temporarily fixed during the retrofitting process by means of the screw 17 for fastening the lower seat cover on the chair frame 2 . After tensioning the return spring 6 , the stop block 11 is pressed against the seat frame 2 by the spring leg 14 in a fixed position. Of the turns of the return spring 6 is an eyelet is formed centrally, in which intervenes together with the Rückstellfe 6 slid onto the shaft member 4 clamping piece 7 a. The required tension of the return spring 6 can now be set by turning the clamping piece 7 accordingly and locking it with the screw 8 .

Must now be a tired or broken return spring 6 , the lower panel is unscrewed from the seat frame 2 folded against the wall. By loosening the clamping piece 7 , the return spring 6 is relaxed. The screws 9 are loosened and the sliding piece 15 can be pushed to the right onto the shaft part 5 . The return spring 6 to be replaced can now be pushed by a slight bend with the clamping piece 7 from the shaft part 4 . A new return spring 6 is so pushed with clamping piece 7 to the shaft member 4, that the spring legs 14 at the back as described above, temporarily fixed stop plate 11 and the stop 10 abut. With the sliding piece 15 , the shaft parts 4 and 5 are rigidly connected again. By turning and locking the clamping piece 7 , the required tension of the new return spring 6 is set. After screwing on the lower seat cover, the repair process is finished.

If the invention is to be realized immediately in the manufacture of new folding seats according to the invention, the formation of the stop 10 a is dispensed with, instead the seat frame 2 is provided with a corresponding stop in the area of the rear left corner, so that the insertion and temporary fixing a stop block 11 is omitted.

Reference list

1

Seat

2nd

Seat frame

3rd

Consoles

4th

Shaft part

5

Shaft part

6

Return spring

7

Clamping piece

8th

screw

9

Screws

10th

attack

10th

a stop

11

Stop block

12th

screw

13

flange

14

Feather legs

15

Sliding piece

16

Spring shaft

17th

screw

Claims (3)

1. Folding seat, in particular for public transport, with a seat that can be folded into a position of use and that can even be folded back into a non-use position, whereby the seat frame that supports the seat is pivotally received on a spring shaft, the spring shaft in brackets ( 3 ) fastened to a wall gela gert, and the restoring force is generated by a return spring arranged on the spring shaft, designed as a spiral spiral spring, characterized in that the spring shaft ( 16 ) consists of two axially spaced between them the return spring removable or insertable shafts ( 4 ; 5 ), which are rigidly but releasably connected by a sliding piece ( 15 ). 2. Folding seat according to claim 1, characterized in that the return spring ( 6 ) is arranged laterally next to the sliding piece ( 15 ), a spring leg ( 14 ) is supported on a seat frame ( 2 ) in a known manner to impact ( 10 ), and the second spring leg ( 14 ) is supported on a stop block ( 11 ) which can be inserted later. 3. Folding seat according to claim 1 or 2, characterized in that the sliding piece ( 15 ) as the on the Wellentei le ( 4 ; 5 ) is formed sleeve.