JPH07223469A - Seat - Google Patents

Abstract

PURPOSE:To facilitate such maintenance work for a seat with a seat cushion and a seat back as cleaning below the seat cushion and repairing. CONSTITUTION:The support frame 5 of a seat back 1 is pivotally attached via a pivoting pin 3 to a frame 6 supported on a leg 4, and the pivoting pin 3 is positioned in front of the lower part 1a of the seat back 1 in the standard position, and the seat back 1 is supported via the pivoting pin 3 in such a manner that it can be folded forward around the pin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a seat back that supports the back of a seated person and a seat cushion that supports the hips of the seated person, and the seat back is a swing fulcrum from the standard position to the rear side. It relates to a stool that is supported so that it can be tilted around.

[0002]

2. Description of the Related Art Stools of the above type, which are widely used in railway cars, automobiles, aircraft, ships, theaters, or in ordinary households, are well known in the art.

FIG. 8 is a front view showing an example of a conventional stool of this type, and FIG. 9 is a side view thereof. The seat 110 shown here has a seat back 101 that supports the back of a seated person (not shown) and a seat cushion 102 that supports the hips of the seated person, and armrests 116, 116 are provided on both sides of the seat cushion 102. Each is arranged. The seat cushion 102 is a plate-shaped seat pan 1
The seat pan 112 is mounted on the frame 12, and is fixedly supported by the underframe 106. Further, the underframe 106 is supported on a leg stand 104 fixedly fixed on the floor 117, and the armrests 116, 116 are fixed to the underframe 106.

The seat back 101 has both armrests 116, 1 via a pivot pin 103 which constitutes a swing fulcrum thereof.
It is pivotally supported by 16 and is tiltably supported around the swing fulcrum in the direction of arrow A from the standard position shown by the solid line in FIG. 9 to the retracted position shown by the chain double-dashed line. With such a configuration, the seated person can freely adjust the tilt position of the seat back 101 according to his / her physical condition and taste, and always sits comfortably.
Can seat 0.

By the way, in the above-mentioned type of stool, it is necessary to perform maintenance work such as cleaning and repairing each element. At that time, seat back 1
When performing maintenance work on the lower part 101A of 01,
Conventionally, the seat back 101 is removed from the pivot pin 103 to perform a predetermined work. This is because it is difficult to work with the seat back 101 attached.

However, since the pivot pin 103, which is the swinging fulcrum of the seat back 101, is arranged inside the seat back 101, the armrests 116, 11 must be removed before the seat back 101 is detached from the pivot pin 103.
6 is removed from the underframe 106 or the skin of the lower part 101A of the seat back 101 is peeled off, so that the pivot pin 103
Had to be taken out from the seat back 101, which made the work very complicated.

Therefore, the seat back 101 is supported so that the seat back 101 can be tilted in the direction of the arrow B from the standard position shown by the solid line in FIG. 9 to the front position shown by the alternate long and short dash line. It is conceivable that the lower part 101A is tilted to the front position to perform maintenance work on the lower part 101A. If you do this,
It is possible to perform maintenance work without removing the seat back 101 from the pivot pin 103.

However, even if the seat back 101 is tilted to the front position shown by the alternate long and short dash line, the lower part 101A of the seat back 101 cannot be exposed to the outside, so that the operator is unnatural in a narrow place. Work must be performed while maintaining a posture, and work efficiency is significantly reduced.

[0009]

SUMMARY OF THE INVENTION The present invention has been made based on the above-mentioned novel recognition, and an object of the present invention is to provide a stool capable of efficiently performing maintenance work of a seat back. is there.

[0010]

In order to achieve the above object, the present invention provides a seat back of the type described at the beginning with a swing fulcrum of the seat back in front of a lower position of the seat back in a standard position. Place the seat back,
A configuration is proposed in which the swinging fulcrum is supported so as to be tiltable forward of the standard position.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a stool according to an embodiment of the present invention, in which a pair of left and right stools 10 and 10a arranged in a passenger compartment of a railway vehicle is shown. These stools 1
Since the basic configuration of 0 and 10a does not change, only the one designated by reference numeral 10 will be described. 2 and 3 are side views of the stool 10, and FIG. 4 is a perspective view showing its internal structure.

The stool 10 has a seat back 1 (not shown) for supporting the back of a seated person and a seat cushion 2 for supporting the back of the seated person, and the seat back 1 supports the interior of the seat back 1 in the vertical direction. It is fixed to the standing portion of the frame 5. The support frame 5 has both arm portions 5a, 5
a comes out from the lower end of the seat back 1 and the seat cushion 2
The bent end is bent and extended toward the lower part of the base plate, and the extended end is provided on each frame plate 14, 14 of the underframe 6 via two pivot pins 3, 3 arranged concentrically with each other, as shown in FIG. It is pivotally attached.

The swinging fulcrum of the seat back 1 is such a pivotally-attached portion, and the seat back 1 is supported so as to be tiltable around the pivot pins 3 and 3 via the support frame 5, as shown in FIG.
It is possible to rotate between the standard position shown in FIG. 3 and the retracted position shown in FIG. In this way, the seat back 1 is rearward from its standard position.
It is tiltably supported around the swing fulcrum.

Here, conventionally, as shown in FIG. 9, the pivot pin 103 constituting the swing fulcrum of the seat back 101 is
Although it was provided in the lower part of the seat back 101, in the present example, the pivot pins 3 and 3 forming the swing fulcrum thereof.
However, as shown in FIG. 2, it is arranged in front of the position of the lower portion 1a of the seat back 1 in the standard position.

In FIG. 4, the underframe 6 has the above-mentioned pair of frame plates 14 and 14 arranged on the left and right, and the stay shafts 7, 13, 15 for connecting them, and the underframe 6 is Figure 2
As shown in Figure 4, the footrest 4 fixed to the floor 17 of the railway vehicle
Supported above. As shown in FIG. 1, armrests 16 and 16 are arranged on both sides of the seat cushion 2, and these armrests are mounted on the frame plate 1 of the underframe 6.
They are fixedly supported by 4 and 14, respectively. One armrest 16 also serves as the armrest of the other seat 10a shown in FIG.

As shown in FIG. 4, both frame plates 14 of the underframe 6,
Stay shaft 7 fixed to the rear part of 14 and support frame 5
A seat back posture holding device including an air spring 9 is interposed between the stay plates 8 fixed to both the arm portions 5a, 5a. The air spring 9 has a cylinder 9a, a piston (not shown) slidably arranged therein, and a piston rod 9b having one end fixed to the piston, and one end of the cylinder 9a is a stay plate. 8
Is pivotally attached to. The other end of the piston rod 9b is
As shown in FIG. 5, the mounting bracket 9c fixed to the bracket is fixed to the bracket 18 fixed to the stay shaft 7 by the pin 19
Is pivoted through. The seat back 1 is biased by the air spring 9 from the retracted position shown in FIG. 3 toward the standard position shown in FIG.

When the seat back 1 occupies the standard position shown in FIG. 2 and the retracted position shown in FIG. 3 or an intermediate position between these, the locking means (not shown) causes the air spring 9 to move. Relative movement between the cylinder 9a and the piston is prohibited, and the seat back 1 is locked and held in its respective positions. By releasing this lock, the seat back 1 can be swung back and forth again. Instead of the air spring 9, a tension spring or the like can be used.

As shown in FIG. 6, pins 11 arranged concentrically on each of the arms 5a, 5a of the support frame 5.
a and 11a are detachably fixed, and rollers 11b and 11b are rotatably fitted to these pins 11a and 11a. And these rollers 11b, 11b
As shown in FIGS. 2 and 4, the seat pan 12 on which the seat cushion 2 is mounted is mounted on the seat pan 12, and the front end side of the seat pan 12 is pivoted on both frame plates 14 and 14 of the underframe 6. It is fixed on a stay shaft 13 which is supported freely.

The seat back 1 shown in FIG.
3 from the standard position shown in FIG.
While tilting to the retracted position shown in
a and the rollers 11b, 11b descend together with the respective arm portions 5a, 5a of the support frame 5, and accordingly, the seat pan 12 pivots clockwise around the axis of the stay shaft 13 in FIG. By this, the seat cushion 2
As shown in FIG. 3, the seat cushion 2 is inclined so that the seat back side portion, that is, the rear portion thereof, is depressed more than the initial position. When the seat back 1 is returned to the standard position shown in FIG. 2 by the urging action of the air spring 9, the seat cushion 2 is also returned to the position shown in FIG.

As described above, since the seat back 1 can be tilted to the retracted position, the seated person can tilt the seat back 1 in accordance with his / her preference and body structure and can easily sit down. Moreover, in this example, since the rear portion of the seat cushion 2 descends as the seat back 1 retreats, the seated person can sit on the seat 10 in a more comfortable state.

By the way, the above-mentioned stool 10 is constructed so that maintenance work such as cleaning the seat back 1 or repairing the seat back 1 can be carried out, and the seat back 1 can be swung so as to facilitate such work. Fulcrum,
That is, as described above, the pivot pins 3 and 3 are located in front of the position of the lower portion 1a of the seat back 1 in the standard position, and the seat back 1 is provided around the swing fulcrum as shown in FIG. It is tiltably supported forward from the standard position indicated by the solid line. This configuration will be described more specifically below.

In order to tilt the seat back 1 to the front side, first, the seat cushion 2 shown in FIGS.
As shown in FIG. 7, it is removed from the seat pan 12 and removed. In this way, the upper part of the seat pan 12 is opened, so that the seat pan 12 is rotated together with the stay shaft 13 in the front side, that is, in the counterclockwise direction in FIG.
This can be brought to the position shown by the chain double-dashed line in FIG. 7, and the tip 12a thereof can be placed on the floor 17.

Next, the pin 19 shown in FIG. 5 is extracted from the holes 9d and 18a of the brackets 9c and 18, and the piston rod 9b of the air spring 9 is separated from the stay shaft 7. As a result, the support frame 5 and the seat back 1 are released from the restraint by the air spring 9.
The support frame 5 together with the seat back 1 are pivot pins 3,
The front end of the seat back 1 can be placed on the floor 17 by rotating the periphery of the seat back 3 to the front side as shown by the chain double-dashed line in FIG.

At this time, the swing fulcrum of the seatback 1, that is, the positions of the pivot pins 3 and 3 are located in front of the lower portion 1a of the seatback 1 when the seatback 1 occupies the standard position. When the vehicle is rotated to the foremost position indicated by the chain double-dashed line in FIG. 7, the lower portion 1a of the seat back 1 is largely exposed upward. Therefore, the operator can clean or repair the lower portion 1a or a portion in the vicinity thereof in a comfortable posture. The maintenance work for the seat back 1 can be performed in a comfortable posture without removing the seat back 1 from the pivot pins 3, 3. By performing the reverse operation, the seat back 1 is returned to its standard position again, and the respective elements of the seat 10 are shown in FIG.
Can be set to the state of.

By the way, the maintenance work of the stool 10 is performed not only on the seat back 1 but also on the underframe 6 and the footrest 4. At that time, in the conventional stool 110 shown in FIGS. 8 and 9, the seat pan 112 has the underframe 106.
Since the seat pan 112 is fixed to the seat pan 112, even if the seat cushion 102 is removed from the seat pan 112, the seat pan 112 interferes and the maintenance work cannot be performed on the underframe 106 and the leg stand 104 from above. It was
For this reason, it is necessary to perform a predetermined work by looking into them from below, and the work is very difficult.

On the other hand, the stool 1 shown in FIGS.
In 0, the seat pan 12 is pivotally attached to the frame plates 14 and 14 of the underframe 6 via the stay shaft 13, so that the seat pan 12 is shown in FIG. It can be rotated to the front position shown by, so that the upper parts of the underframe 6 and the leg stand 4 can be opened.
Therefore, the worker can perform maintenance work on the underframe 6 and the footrest 4 from above, and can easily and efficiently perform a predetermined work.

The present invention can be widely applied not only to the stools of railway vehicles but also to the stools used in automobiles, aircrafts, ships, theaters, offices, general households and the like. It can also be applied to a seat without a seat pan.

[0029]

According to the seat of claim 1, the seat back can be rotated forward from its standard position, and its swinging fulcrum is located at the lower position of the seat back at the standard position. Since the seat back is disposed in front of the seat back, when the seat back is rotated to the front position, the lower portion of the seat back can be largely exposed and opened upward, and the maintenance work can be performed easily.

[Brief description of drawings]

FIG. 1 is a perspective view showing a seat according to an embodiment of the present invention.

FIG. 2 is a side view of the seat when the seat back is in the standard position.

FIG. 3 is a side view of a seat when the seat back is tilted to a retracted position.

FIG. 4 is a perspective view showing an internal structure of a stool.

FIG. 5 is an exploded perspective view illustrating a connection state between a piston rod of an air spring and a stay shaft.

FIG. 6 is a pin attached to an arm portion of a support frame,
It is an exploded perspective view showing a roller rotatably fitted in this.

FIG. 7 is a side view illustrating an operation when the seat back is tilted forward.

FIG. 8 is a front view showing an example of a conventional stool.

9 is a side view of the stool shown in FIG.

[Explanation of symbols]

 1 seat back 1a lower part 2 seat cushion 10 stool 10a stool

Claims (1)

[Claims] 1. A seat back that supports the back of a seated person and a seat cushion that supports the hips of the seated person, and the seat back can be tilted rearward from its standard position around a swing fulcrum. In the supported stool, the swing fulcrum of the seat back is arranged in front of the lower position of the seat back in the standard position, and the seat back is placed around the swing fulcrum and in front of the standard position. A stool that is supported so that it can be tilted to the side.