JPH09123812A - Springing-up seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure, reduce manufacturing cost, and arrange a small rotary space in the rear of a seat and under it. SOLUTION: An extending part 22 is extendedly arranged on the rear end of a seat surface frame 1, and the lower end of a straight line-shaped link 23 having a long hole 25 is turnably connected to this extending part 22 by a connecting pin 24. A slidingly movable pin 26 to slidably engage with the slot 25 of the link 23 is protrusively arranged on the lower end side of a back slide frame 5. A guide member 27 having a vertical guide surface 28 to guide the upper end of the link 23 is arranged on a seat frame 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jump-up stool which is used in a railway vehicle or the like and which stores a seat substantially vertically along a backrest during storage.

[0002]

2. Description of the Related Art Conventionally, when sitting on a railway vehicle,
In order to enable people with disabilities to ride in wheelchairs, a fixed stool seat, commonly called a box seat, is flipped up to secure a sufficient floor area for the wheelchair to enter between the front and rear box seats. The seat back is normally tilted backward by a required angle in order to improve the sitting comfort. However, when the seat is stowed, the distance between the seats before and after the seat is raised is increased.
As disclosed in Japanese Patent Application No. 01279, Japanese Patent Application Laid-Open No. 6-199167, etc., it is configured to be stored substantially vertically along a stool frame by rotating in conjunction with a seat.

FIG. 5 is a side view showing the link mechanism of the jumping-up stool disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 7-101279. This jumping stool rotatably supports a rear end portion of a seat frame 1 and a lower end front end of a link 2 formed in a substantially U-shape in a side view by a shaft 3, and an upper end of the link 2. The sliding pin 4 provided on the rear portion of the backrest frame 5 is slidably engaged with the guide groove 6 provided on the lower end portion of the backrest frame 5, and the link 2
A slide pin 8 provided on the rear end side of the seat frame 1 is slidably engaged with a guide hole 7 provided at the bent portion of the seat frame 1. The backrest frame 5 has its upper end rotatably supported on the upper part of the stool frame 11 via a shaft 12, and usually has its lower end rearward so as to be separated from the front face of the stool frame 11 in order to improve the sitting comfort. The seat 9 is inclined, and when the seat 9 is flipped up, the seat 9 is rotated in the direction of the arrow A and is stored substantially vertically along the front surface of the stool frame 11. In addition, 10 is a backrest provided on the front surface of the backrest frame 5, and 13 is a stopper that locks the seat frame 1 in a substantially horizontal state when seated.

[0004]

In the conventional jump-up stool described above, the link 2 is rotated clockwise by approximately 90 ° when the seat 9 is stored. Requires a large turning space. Therefore, there is a problem in that there is a restriction when a storage such as a heater is stored inside a leg stand (not shown). Also,
Since the link 2 is formed in a substantially U-shape, the link 2 has a complicated shape, and when punched by a press machine, there is a problem that a material loss is large and a manufacturing cost is high.

The present invention has been made to solve the above-mentioned problems of the prior art. The purpose of the present invention is to have a simple structure and can be manufactured at a low cost. It is to provide a jump-up stool capable of providing a moving space.

[0006]

In order to achieve the above-mentioned object, the present invention is to extend an extension portion to a rear end of a seat frame rotatably supported by a stool frame, and to form a linear shape in the extension portion. The lower end of a link having a long hole formed therein is rotatably connected, and the upper end side is slidably engaged with the long hole of the link at the lower end side of a backrest frame pivotally supported by the stool frame. Sliding pins that fit together are provided in a protruding manner, and a guide member that vertically guides the upper end of the link is provided on the stool frame.

In the present invention, the link is formed in a straight line, and only the lower end is rotatably supported by the extension of the seat surface frame, so that the structure of the link mechanism is simplified. When the seat is flipped up, the upper end side of the link descends along the guide member, and the lower end side moves diagonally forward and downward as the extension part rotates. At this time, the sliding pin moves from the front end side to the rear end side of the elongated hole of the link to rotate the backrest backward and store the seatback substantially vertically along the front surface of the stool frame.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the embodiments shown in the drawings. 1 is a perspective view showing a usage state of a jump-up stool according to the present invention, FIG. 2 is a perspective view showing a storage state of the stool, and FIG. 3 is a side view showing a state of the link mechanism of the stool when using the stool, FIG. 4 is a side view showing a state where the link mechanism is seated and stored. It should be noted that the same components as those described in the section of the prior art are denoted by the same reference numerals and the description thereof will be omitted. In these figures, the jump-up stool 20 includes a substantially vertical stool frame 11 installed on a pedestal 21. The backrest frame 5 is provided on the front surface of the stool frame 11 with its upper end rotatably supported in the front-rear direction by a shaft 12, and normally, that is, when the seat 9 is used.
As shown in (4), the lower end portion is moved forward so that it is inclined backward by a required angle. Also, a pair of left and right horizontal portions 11A extending forward along the upper surface of the leg base 21 are integrally provided on both sides of the lower end of the stool frame 11,
Between these horizontal portions 11A, a shaft 3 which horizontally supports a rear end portion of the seat surface frame 1 so as to be rotatable in the up-and-down direction is horizontally installed.
An extension portion 22 of an appropriate length extending rearward is integrally provided on both side surfaces of the seat frame 1, and the extension portion 22 is provided.
The link 2 is formed by a thin metal plate in a straight line.
The lower end of 3 is rotatably connected by a connecting pin 24. An elongated hole 25 is formed in the longitudinal direction of the link 23, and a sliding pin 26 projecting from the lower end of the side surface of the backrest frame 5 is slidably engaged in the elongated hole 25. There is. The upper end of the link 23 extends obliquely rearward and upward, and is a guide member 27 provided at the lower end of the stool frame 11.
Is in contact with The guide member 27 is formed by bending a metal plate into an L-shape in a plan view, and thus is orthogonal to the front and back surfaces of the stool frame 11 and extends first in a vertical direction. The second plate portion 27b is orthogonal to the portion 27a, and the first plate portion 27a is fixed to the side surface of the stool frame 11 by welding, bolts, or the like.
The front surface of the second plate portion 27b is the guide surface 28 of the link 23.
Is formed. In addition, 30 is an armrest, 31 is a seat 9
Is a seat lock mechanism that locks the extension portion 22 of the seat frame 1 when it is stored, 32 is a pedal that releases the locked state by the seat lock mechanism 31, 33 is a commuter seat, and 34 is a handle.

A jump-up stool 20 having such a structure
In the use state shown in FIG. 3, the extension portion 22 of the seat 9 is held in a state in which the extension portion 22 abuts on the lower surface of the stopper 13 provided on the leg base 21 and is inclined slightly rearward and downward. In this state, the link 23 is inclined at the maximum angle with respect to the horizontal line, and the upper end of the link 23 has the upper end.
7 is in contact with the upper part of the guide surface 28. Also,
The sliding pin 26 is located at the lower end of the elongated hole 25, and is located closest to the rear of the link 23 diagonally above, thereby separating the backrest frame 5 from the sitting frame 11. Therefore, the backrest 10 is inclined rearward by a predetermined angle. In this state, even if the passenger sits on the seat 9 and leans against the backrest 10, since the link 23 is prevented from rotating unless the seat 9 rotates, the backrest 10 is kept in use.

When storing the seat 9, the seat 9 is flipped up by hand. When the seat 9 is flipped up, the seat frame 1 rotates clockwise about the shaft 3 as a center of rotation, and
Pull 3 down. For this reason, the upper end of the link 23 slides and descends along the guide surface 28, and the sliding pin 26 slides into the elongated hole 25.
And moves to the right along with to rotate the backrest frame 5 counterclockwise about the shaft 12. When the seat 9 is rotated until it becomes substantially vertical, the bar 3 provided on the extension portion 22
5 is locked by the seat lock mechanism 31, and the seat 9
Is held substantially vertically and in contact with the backrest 10.
At this time, the backrest 10 is seated by the backrest frame 5 contacting the front surface of the seating frame 11.
It is stored substantially vertically along 1. FIG. 4 shows this state.

In order to return the seat 9 from the stored state to the used state, the pedal 32 is depressed to release the locking state of the bar 35 by the seat lock mechanism 31, and then the seat 9 is made substantially horizontal to the front side by hand. It suffices that the extension portion 22 is brought into contact with the stopper 13 by rotating it up to. When the seat 9 is tilted to the front side, the link 23 ascends together with the extension portion 22, so that the backrest 10 rotates in the front side in conjunction with the seat 9 and returns to the original use state. In addition, as the seat lock mechanism 31,
Anything can be used as long as it can lock the seat 9 in the storage position, and in the present embodiment, a commercially available product is used, and thus the detailed description thereof will be omitted.

In the jump-up stool 20 described above, one link 23 linearly formed by an elongated metal plate and a guide member 27 formed in an L shape are used as the link mechanism. The structure of the mechanism is simple,
It can be manufactured easily and at low cost. Further, since the upper end of the link 23 is vertically moved along the guide surface 28, the rotation angle of the link 23 is small, and a small rotation space can be provided behind the seat 9. Furthermore, since the upper end of the link 23 is always located above the lower end and moves vertically up and down along the guide surface 28, there is no need to secure a large space below the link 23, and the link 23 is stored in the footrest 21. There is no restriction on the stored items such as the heater. Further, the lower end side of the link 23 is connected to the extension part 22 extending to the rear end of the seat surface frame 1 via a connecting pin 24, and the upper end side is slidably abutted on a guide member 27 provided on the stool frame 11. Since they are in contact with each other and are connected to the backrest frame 5 by the long holes 25 and the sliding pins 26, the structure of the link mechanism is simpler than the jumping stool disclosed in JP-A-7-101279 and the number of pins is increased. 1
It can be reduced.

[0013]

As described above, in the jumping stool according to the present invention, the extension portion is provided at the rear end of the seat frame which is rotatably supported by the stool frame, and the extension portion has a linear shape. The lower end of a link having a long hole formed therein is rotatably connected, and the upper end side is slidably engaged with the long hole of the link at the lower end side of a backrest frame pivotally supported by the stool frame. Since the corresponding sliding pin is provided in a protruding manner and the guide member for vertically guiding the upper end of the link is provided on the stool frame, the structure of the link mechanism is simple and can be manufactured at low cost. Further, since the upper end of the link is vertically moved up and down along the guide member, the turning angle of the link is small, and a small turning space can be provided in the rear and lower parts of the seat, especially in the foot stand. It is suitable because there is no restriction when accommodating a storage object such as a heater.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a usage state of a jump-up stool according to the present invention.

FIG. 2 is a perspective view showing a stored state of the stool.

FIG. 3 is a side view showing a state in which the link mechanism of the same stool is used when the stool is used.

FIG. 4 is a side view showing a state where the link mechanism is seated and stored.

FIG. 5 is a side view showing a state where a conventional jump-up stool link mechanism is used while stooling.

[Explanation of symbols]

1 ... Seat frame, 2 ... Link, 3 ... Shaft, 5 ... Seat frame, 9 ... Seat, 11 ... Seating frame, 10 ... Seat, 21 ... Stand, 22 ... Extension, ... 23 ... Link, 2
4 ... Connection pin, 25 ... Long hole, 26 ... Sliding pin, 27 ... Guide member, 28 ... Guide surface.

Claims (1)

[Claims] 1. A lower end of a link having a long hole which is linearly formed in the extending portion and which is extended at the rear end of a seat frame rotatably supported by a stool frame. A sliding pin that slidably engages with the long hole of the link is provided on the lower end side of the backrest frame that is rotatably supported on the stool frame at the upper end side. A jump-up stool characterized in that a guide member for vertically guiding the upper end of the link is provided.