JPH07101279A - Folding seat - Google Patents

Abstract

PURPOSE:To provide a folding seat used for a vehicle or the like being provided with a small number of part items, with a seat back inclined in the service state of the seat and placed almost vertically to a floor in the enclosed state so as to be enclosed in a small space. CONSTITUTION:A seat face hinge pin 10, and a seat back hinge pin 12 disposed parallel with the seat face hinge pin 10 and obliquely upward and backward from the seat face hinge pin 10 are respectively provided with a seat face frame 13 and a seat back frame 14 rotatably. Both frames 13, 14 are rotatably engaged with the seat face hinge pin 10, and connected by a connecting plate 16 with a first groove 17 formed at the intermediate part so that a first pin 19 erected at the seat face frame 13 is slidably engaged with this first groove 17 and with a second pin 20 provided at the tip part so as to be slidably engaged with the second guide groove 18 of the seat back frame 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flip-up stool used in vehicles and the like. 2. Description of the Related Art In recent years, some seats in public vehicles such as railway vehicles have been provided with seats that allow the seating surface to be flipped up to secure a space for a wheelchair.

[0002]

2. Description of the Related Art A flip-up stool having a simple structure is of the type shown in FIG. (a) is a type in which the backrest SB is substantially vertical to the floor when in a sitting position, and (b) is a type in which the backrest SB ′ is inclined rearward when in a sitting position.

In these stools, the type (b) is
Compared to the type shown in (a), the seat back is slanted so that it is comfortable to sit in, but there is a problem that it requires a storage space. Therefore, there has been proposed a stool in which the backrest is inclined when the stool is used and does not take up space when stored.

FIG. 6 is a block diagram for explaining an example of such a stool. Reference numeral 1 is a base frame fixed to the floor. The base frame 1 is provided with a motor unit 3 having a speed reduction mechanism for rotationally driving the rotary arm 2 in the arrow direction.
Is provided. The rotating arm 2 includes a seat frame 4
The base end portion of and the substantially C-shaped link 5 are fixed.

When the seat is used, the link 5 is rotatably attached to the lower portion of the backslip frame 6 which is inclined rearward, and one end of the link 5 is rotatably attached to the upper portion of the base frame 1 at the upper portion of the backrest frame 6. Swing link 7 attached
The other end of is attached rotatably.

Then, the base frame 1 and the link 5
The backrest frame 6 and the swing link 7 form a link mechanism. Next, the operation of the above configuration will be described. The state shown in the figure is a state in which the user can sit on the seat surface of the stool. When the motor unit 3 is driven from this state, the seat surface frame 4 rotates clockwise in the figure, and the backrest frame 6 in the inclined state rotates while moving diagonally upward, and is substantially perpendicular to the floor. Becomes

According to the above construction, the backrest is inclined when the stool is used, and when the stool is stored, the backrest is substantially vertical to the floor, and the storage space when the stool is stored can be reduced.

[0008]

However, in the stool having the above structure, two link members are provided in order to realize a mechanism for making the backrest frame 6 tilted during use substantially vertical to the floor when stored. , That is, the swing link 7 and approximately C
A glyph link 5 is required.

Therefore, many parts are required, the cost is high, and the number of assembling steps is large. The present invention has been made in view of the above problems, and an object thereof is a small number of parts, the backrest is inclined in a stool use state, and the backrest is substantially vertical to the floor in a stored state, and when the stool is stored. The storage space is to provide a small splash stool.

[0010]

DISCLOSURE OF THE INVENTION The present invention for solving the above-mentioned problems is directed to a seat hinge pin arranged in parallel with a floor, and to a seat diagonally above the seat hinge pin in parallel with the seat hinge pin. The seat back hinge pin arranged, the seat surface frame rotatably provided on the seat surface hinge pin, the back seat frame rotatably provided on the back seat hinge pin, and the seat surface hinge pin rotatable A base end that engages with the first base, a first extension that extends from the base to the rear of the seat frame, and a first extension that extends to the back of the backrest frame. A connecting plate including a second extending portion, and a first arc-shaped guide having the seat hinge pin as a center in one of the first extending portion of the connecting plate and the seat frame, and the other. First
A first slider slidably engaged with the guide of
A linear second extending vertically in either one of the backrest frame and the second extending portion of the connecting plate.
And a second slider slidably engaged with the second guide on the other side, and the first slider is
In the stool use state, it is positioned above the first guide, and when the stool rotates in the storage direction, it abuts on the lower end of the first guide, and the second slider moves to the first position in the stool use state. It is located above the second guide.

[0011]

In the flip-up seat of the present invention, when the seat frame in use is rotated about the seat hinge pin in the seat storage direction, the seat frame rotates and the first slider moves above the first guide. Moves downward from and abuts the lower end.

Further, when the seat frame is rotated in the storage direction, the connecting plate is pressed by the first slider and rotates together with the seat frame. By rotating the connecting plate,
The second slider moves below the second guide, and the seatback frame rotates about the seatback hinge pin in a direction perpendicular to the floor.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a main part of an embodiment of the present invention, and FIGS. 2 to 4 are configuration diagrams for explaining the operation in FIG.

In FIG. 1, a base plate 9 fixed on the floor 11 is provided with a seat hinge pin 10 provided in parallel with the floor 11 and a seat plate hinge pin 10 provided obliquely rearward of the seat hinge pin 10 in parallel with the seat hinge pin 10. And a backrest hinge pin 12 that is provided. The seat hinge pin 10 is rotatably provided with an intermediate portion of the seat frame 13, and the seat back hinge pin 12 is rotatably provided with an upper part of the seat back frame 14. Reference numeral 15 denotes a seat surface stopper which is provided on the base plate 9 and which engages with the rear portion of the seat surface frame 13 when the seat is used (state shown in FIG. 1) and prohibits further tilting of the seat surface frame 13.

An inverted L-shaped connecting plate 16 is rotatably attached to the seat hinge pin 10. The connecting plate 16 includes a base end portion 16a that rotatably engages with the seat surface hinge pin 10, and a seat surface frame 1 from the base end portion 16a.
3 includes a first extending portion 16b extending toward the rear portion and a second extending portion 16c extending from the first extending portion 16b to the back portion of the backrest frame 14. The first extending portion 16b is formed with a first guide groove 17 as an arc-shaped first guide centered on the seat hinge pin 10.

The backrest frame 14 has a second guide groove 18 as a linear second guide extending in the vertical direction.
Is provided. A first pin 19 as a first slider slidably engaged with a first guide groove 17 of the connecting plate 16 is provided at a rear portion of the seating surface frame 13 and a second extending portion of the connecting plate 16 is provided. 16c has a second guide groove 18
Second pins 20 as second sliders slidably engaged with are vertically provided.

The first pin 19 is located above the first guide groove 17 in the sitting state shown in FIG. 1, and the second pin 20 is above the second guide groove 18 in the sitting state. It is provided to be located in.

Next, the operation of the above structure will be described with reference to FIGS. When the seat surface frame 13 is rotated in the seat storage direction around the seat hinge pin 10 from the seated use state shown in FIG.
The pin 19 moves downward from the upper part of the first guide groove 17 and contacts the lower end of the first guide groove 17 as shown in FIG.

Further, when the seat frame 13 is rotated in the housing direction, the connecting plate 16 is pressed by the first pin 19 and rotates together with the seat frame 13 as shown in FIG. Due to the rotation of the connecting plate 16, the second pin 20 moves below the second guide groove 18, and the backrest frame 1
4 starts rotating in the direction perpendicular to the floor 11 about the backrest hinge pin 12.

Then, as shown in FIG. 4, the seat surface frame 1
When 3 is rotated to a storage state in which it is substantially vertical to the floor 11, the backrest frame 14 is also substantially vertical to the floor 11.

According to the above construction, a large component of the link mechanism for making the backrest frame 14 inclined at the time of use substantially vertical to the floor 11 at the time of storage is the connecting plate 1.
It is 6.

Therefore, as compared with the conventional mechanism shown in FIG. 6, the number of parts is reduced, the cost is low, and the number of assembling steps is also reduced. The present invention is not limited to the above embodiment. For example, in the above embodiment, the guide and the slider slidably engaged with the guide are realized by the guide groove and the pin. However, the guide groove and the roller may be used.

Further, in the above embodiment, the connecting plate 16
To the first guide groove, the seat frame to the first pin 19,
Although the back guide frame 14 is provided with the second guide groove 18 and the connecting plate 16 is provided with the second pin 20, conversely, the connecting plate 16 is provided with the first pin and the seat frame is provided with the first guide groove. Second pin on the shear plate 14, connecting plate 1
You may make it provide the 2nd guide groove in 6.

[0024]

As described above, according to the present invention, the seat hinge pin and the backstrap hinge pin that is arranged parallel to the seat hinge pin and obliquely rearward and upward of the seat hinge pin are provided.
A seat frame and a backrest frame are rotatably provided, respectively, and the seat frame and the seatback frame are connected using a connecting plate that rotatably engages with a seat hinge pin, and a first guide and a first slider are provided. With the engagement of the second guide and the second slider with a few parts, the backrest inclines when seated, and the backrest is substantially vertical to the floor when stored. You can realize a flip-up stool with a small storage space when storing it.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part of an embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating an operation in FIG.

FIG. 3 is a configuration diagram illustrating an operation in FIG.

FIG. 4 is a configuration diagram illustrating an operation in FIG.

FIG. 5 is a diagram illustrating a conventional stool type.

FIG. 6 is a configuration diagram illustrating an example of a conventional stool.

[Explanation of symbols]

 10 Seating Surface Hinge Pin 11 Floor 12 Backing Hinge Pin 13 Seating Frame 14 Backing Frame 16 Connecting Plate 16a Base End 16b First Extending Part 16c Second Extending Part 17 First Guide Groove (First Guide ) 18 second guide groove (second guide) 19 first pin (first slider) 20 second pin (second slider)

Claims (1)

[Claims] 1. A seat surface hinge pin (10) arranged parallel to a floor (11), and a seat surface hinge pin (10) arranged parallel to the seat surface hinge pin (10) and obliquely rearward and upward from the seat surface hinge pin (10). A seat back hinge pin (12) installed, a seat frame (13) rotatably provided on the seat hinge pin (10), and a back rotatably provided on the back hinge pin (12). A shear frame (14), a base end portion (16a) that rotatably engages with the seat surface hinge pin (10), and extends from the base end portion (16a) toward the rear part of the seat surface frame (13). The first extension (1
6b) and a second extension (16) extending from the first extension (16b) to the back of the backrest frame (14).
a connecting plate (16) consisting of c), and the seat hinge pin (10) as a center on either one of the first extending portion (16b) of the connecting plate (16) and the seat frame (13). A first slider (19) slidably engaged with the first guide (17) is provided on the other side, and the backrest frame (14) and the connection are provided. Plate (1
A linear second guide (18) extending in the vertical direction can be slid to either one of the second extending portions (16c) of 6), and the other can slide to the second guide (18). Second to engage
The first slider (19) is located above the first guide (17) in a stool use state, and when the stool rotates in the storage direction, the first guide (19) is provided. A flip-up stool which is in contact with the lower end of (17) and in which the second slider (20) is located above the second guide (18) in a sitting state.