JPH11227648A - Method and device for setting of seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device for seat setting whereby two sets of front seats can be set simultaneously. SOLUTION: According to this method, the front seats 2 of a vehicle are set in the vehicle body 10 equipped with rear door(s), whereby two sets of front seats 2 constituting a driver's seat and front passenger seat are held simultaneously while a certain spacing is reserved in between. The seats 2 are inserted from an opening 11 provided for mounting of rear door and then moved within the body 10 to the mounting position in the front part of the body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat insertion method and a seat insertion device for inserting a held seat into a predetermined position in a vehicle body, and more particularly to a seat insertion device capable of inserting two front seats at a time. The present invention relates to a method and a seat loading device.

[0002]

2. Description of the Related Art When assembling a seat in a vehicle, an operator uses a seat insertion device 101 as shown in FIG. 11, for example, to insert a held seat 103 into a vehicle body 102 moving on a transport line. Positioning, removing the seat input device 101 and seat 103 to the vehicle body 1
02 and fix it with bolts. Therefore, the work of inserting the sheet, which has been performed manually, has greatly reduced the labor of the operator by using the seat insertion device. Various improvements have been made to the seat insertion device.

[0003]

However, even with the conventional seat loading device in which various improvements have been made to make the work easier, especially when the front seat is assembled, the operation method is not the same as the driving method. The seat and the front passenger seat have to be separately operated left and right, one leg at a time, so that the workability is inferior, and there is a problem that equipment costs increase due to the necessity of providing two seat insertion devices on the left and right. That is, as shown in FIG. 11, the driver's seat and the passenger seat which are independently configured use the door mounting openings 104 (the driver's seat side and the passenger's seat side) of the front door where the door is not yet mounted. Then, the sheet 103 is inserted from there.

Therefore, if two front seats, a driver's seat and a passenger's seat, are to be inserted from one side (passenger's side), respectively, or if they are to be inserted at the same time while holding them, the opposite side (driver's seat side). Cannot be inserted because the seat hits a parking lever, a gear shift lever, or the like. Therefore, the conventional seat loading device is configured to hold a single front seat, and is provided on each of the left and right sides of the vehicle body to be conveyed. Therefore, since the assembling work is performed by the separate seat loading devices, it takes a long time, and the burden of the equipment cost by the seat loading device is large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and an object of the present invention is to provide a seat insertion method and a seat insertion device capable of inserting two front seats at a time.

[0006]

SUMMARY OF THE INVENTION A seat insertion method according to the present invention is a method for inserting a front seat into a vehicle body having a rear door, comprising a driver seat and a passenger seat.
It is characterized in that the front seats of the legs are held at the same time while maintaining a mounting interval, and after inserting the two front seats through the mounting opening of the rear door, the inside of the vehicle body is moved to the mounting position at the front of the vehicle body. . Therefore, it becomes possible to insert two front seats at a time, which previously could only be inserted one leg at a time, and the work time required for seat insertion is greatly reduced, thereby improving productivity.

On the other hand, the seat insertion device of the present invention is fixed to an operation means capable of turning and operating in the vertical direction, and is capable of holding a front seat and being inserted into a predetermined mounting position in a vehicle body. And a support shaft having a length corresponding to two legs of a driver's seat and a passenger's seat constituting a front seat is made parallel to a front seat mounting surface of a vehicle body,
Further, it is provided so as to be rotatable about its axis, and a holding member for holding the front seat is provided at two positions on the driver's seat side and the passenger's seat side with respect to the support shaft. Therefore, the holding member of this seat loading device changes the angle by the rotation of the support shaft to hold the two front seats, that is, to hold the two front seats at the same time at the time of assembly to the vehicle body. The front seats, which could only be inserted one leg at a time, could be inserted by inserting them through the mounting opening of the rear door as in the above-described seat insertion method. The legs can be inserted at one time, and the work time required for seat insertion is greatly reduced, and productivity is improved.

Further, in the seat loading device of the present invention, the holding portion provided on the support shaft has two kinds of holding forms by rotation of the support shaft, and the front seat is held in the first holding form. And holding the rear seat in the second holding mode. Therefore, the front seat and the rear seat can be inserted into the vehicle body by one seat input device, so that the equipment cost can be reduced and the installation space can be reduced.

Further, in the seat loading device of the present invention, the first holding form formed by the holding portion supports a backrest constituting a front seat and a back corner of the seat, and presses the front surface of the backrest. The second holding form supports the backrest head and the front part of the seat constituting the rear seat. Therefore, the held front seat is sent forward and positioned in the vehicle body,
In addition, when the rear seats held are sent rearward in the vehicle body and positioned, the front seats are held from the rear and the rear seats are held from the front even when the front and rear seats are loaded by a single vehicle. Also in this case, after the seat is put into the vehicle body, the holding member can be easily removed from the seat.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a seat insertion device according to the present invention will be described with reference to the drawings. The seat insertion device is mounted on a balancer 61 shown in FIG. 1 which can be turned around a base and operated up and down. The balancer 61 has a fixed part 62 whose top surface is fixed to one side of the transport line, and is capable of rotating 360 degrees around the rotating part 63, and an arm part 64 extending from the rotating part 63 swings up and down. It is provided freely. Further, the arm 6
A joint 65 that always faces the vertical direction is connected to the four tips, and the joint 65 is provided with rotating parts 66 and 67 in two stages, and the seat insertion device 1 is attached to the tip.
The balancer 61 is fixed to one side of the line along a transport line (not shown), and an operator uses the seat insertion device 1 for a vehicle body that is sequentially transported by turning and vertically operating the balancer 61. Thus, the seat is held and inserted and positioned in the vehicle body.

By the way, the seat insertion device 1 of the present embodiment.
Is desirably intended for a vehicle having a front door and a rear door on at least one side. That is, the seat insertion device 1 is used to insert two front seats, a driver's seat side and a passenger's seat side, at a time, and to insert the front seats through a mounting opening of a rear door of a vehicle body. Therefore, FIG. 2 is a side view showing the seat insertion device 1 in a state where the front seat 2 is inserted through the mounting opening 11 of the rear door, and FIG. 3 is a state in which the rear seat 3 is inserted through the mounting opening 11 of the rear door. FIG. 2 is a side view showing the seat insertion device 1.

As shown in FIGS. 2 and 3, the seat insertion device 1 holds the front seat 2 and the rear seat in respective holding forms. Then, the operator puts the seats 2 and 3 held in the respective holding modes into the vehicle body through the mounting opening 11 of the rear door, and operates the balancer 61 to move the seats 2 and 3 to the respective positions as shown in FIG. Position 2 and 3. Here, FIG. 4 is a diagram showing a positional relationship between the front seat 2 and the rear seat 3 with respect to the mounting opening 11 of the rear door. And the worker
At this loading position, the seat loading device 1 is removed from the front seat 2 or the rear seat 3 and the front seat 2 or the rear seat 3 is fixed to the vehicle body by bolting or the like.

Next, such a seat insertion device 1 will be specifically described. FIG. 5 is a view as viewed from an arrow A when the seat insertion device 1 of FIG. 2 holding the front seat 2 is viewed from the front, and FIG. 6 is a view as viewed from an arrow B as viewed from above. First, as shown in FIG. 5, the seat insertion device 1 is provided with a holding bracket 30 for directly holding the seats 2 and 3 rotatably about a horizontal axis with respect to a base shaft 21 mounted on a balancer 61. ing. A rotating shaft 23 for rotatably supporting the holding bracket 30 is rotatably inserted into a fixed tube 22 orthogonal to the base shaft 21. As shown in FIG. 7, a rotating plate 24 with a handle 25 is integrally fixed to the rotating shaft 23, and a support tube 27 to which a holding bracket 30 is attached is coaxial with the rotating shaft 23.
(See FIG. 5) is fixed. A cylinder 26 is provided for the rotary plate 24 for pinning and positioning the rotational position.

The support tube 27 has a hollow cylindrical shape and is divided into four parts. The support tube 27 is coaxial with each other through frames assembled to hold the sheets 2 and 3 described later. In addition, they are positioned at predetermined intervals. A rotation shaft 28 that constitutes a rotation part of the holding bracket 30 is rotatably inserted into the support tube 27. The support tube 27 and the rotary shaft 28 correspond to the “support shaft” described in the claims. By the way, as described above, the holding bracket 30 assembled to the support tube 27 is configured to be able to hold the front seat 2 or the rear seat 3 in each of the holding forms shown in FIGS. 2 and 3.

Therefore, first, two front seats 2, 2
The structure of the holding bracket 30 assembled for the first holding mode for holding the holding member will be described. Front seats 2, 2
As shown in FIG. 2, the seat back frame 3 for supporting the seat back (backrest) 2a from behind is
1. Seat frame 3 for supporting seat 2b from below
2, and support rollers 33 for supporting the seat back 2a from the front. That is, the holding bracket 30 arranges the seat back frame 31 and the seat frame 32 at a substantially right angle so as to follow the rear shape of the front seat 2, thereby holding the rear corner of the front seat 2. Since the weight is biased toward the front of the seat 2b, the seat back 2a is supported by the support roller 33 so as to stop the supported front seat 2 from leaning forward.
It is configured to hold the front of the camera.

Next, a structure for holding the front seats 2, 2 of the holding bracket 30 will be described with reference to FIGS. By the way, in FIG.
Although only the legs have been shown and described, as described above, the seat insertion device 1 of the present embodiment is characterized in that two legs can be inserted at a time, and the configuration is also shown in FIG. It is configured to be able to hold the two legs in such a state. Therefore, the seat back frames 31, 31, which support the seat back 2a from the back, have a substantially U-shape as shown in FIG. It is fixed by welding. The fixed frames 34, 34 have seat frames 32, 3 having a substantially U-shape as shown in FIG.
Similarly, both end portions are welded and fixed at the p portion. Also,
The fixed frames 34, 34 connect two support tubes 27, 27,.

On the other hand, the support rollers 33, 33 for supporting the seat backs 2a, 2a from the front are formed of rubber material.
It is rotatably provided at the end of the horizontal frame 35 with both ends stepped. The horizontal frame 35 having the support rollers 33, 33 is welded and fixed to two oblique frames 36, 36 (see FIG. 2) parallel to each other between the front seats 2, 2 by q portions.
Further, a seat back frame 41 for holding a rear seat 3 to be described later is also welded and fixed at a q portion. The oblique frame 3 welded and fixed to the horizontal frame 35
The other ends of 6, 6 are welded and fixed to the fixed frame 34 at r portions. Therefore, the seat back frames 31, 3
1, seat frames 32, 32 and support rollers 33, 3
3 (the horizontal frame 35 connected to the support rollers 33, 33)
And the oblique frames 36, 36) support the support tube 27,
27 are integrally fixed.

Next, a structure for holding the rear seat 3 of the holding bracket 30 will be described. The structure of the holding bracket 30 assembled for the second holding mode for holding the rear seat 3 is, as shown in FIG.
a seat back frame 41 for supporting the head so as to be gripped from front to back, and seat frame 4 for supporting the tip of the seat 3b so as to be gripped from above to below.
2, and mainly comprises a clamp cylinder 51 for rotating the seat frame 42. That is, the holding bracket 30 is configured to hold the end of the rear seat 3 at two points and to prevent the held rear seat 3 from tilting backward because the weight is biased toward the rear of the seat 3b.

Next, the seat back frame 41 and the seat frame 42 constituting the holding bracket 30 will be described in more detail with reference to FIGS. Here, FIG. 8 is a view of the seat insertion device 1 of FIG. 3 holding the rear seat as viewed from the arrow C as viewed from the front, and FIG. 9 is a view as viewed from the direction of the arrow D as viewed from above. The rear seat 3 here
Is assumed to be, for example, an integrated type, but may be a split type.

The seat back frame 41 for holding the rear seat 3 of the holding bracket 30 has a substantially L-shape along the shape of the seat as shown in FIG. 3, and is turned back so as to grip the head of the seat back 3a. A strip 41a is formed. And the two seat back frames 4
8, 41 are the oblique frames 36, 36 as shown in FIG.
Same spacing as (and therefore partially overlapped in the drawing)
And is fixed by welding at the q portion. A support plate 43 for supporting the seat back 3a from behind is provided at the end thereof.
1a, 41a. The other end is fixed to the support tube 27 as shown in FIG.

On the other hand, each of the seat frames 42, 42 has a U-shaped pipe formed with a return portion 42a at a central portion thereof as shown in FIG. 3, and receiving plates 44, 44 for receiving the bottom surface of the seat 3b there. Is attached. And
As shown in FIGS. 8 and 9, both end portions of the seat frames 42 are fixedly welded to a single connection frame 45, respectively, and are provided rotatably with respect to the support tubes 27. That is, the connection frame 45 to which the seat frames 42, 42 are fixed is connected to the support pipes 27,
27, and is connected to rotating parts 29, 29 fixed to a rotating shaft 28.

A rotating part 29 fixed to the rotating shaft 27 is provided in the middle thereof, and the rotating part 29 is provided with the clamp cylinder 5 fixed to the seat back frame 41.
1 are connected. The clamp cylinder 51 has its cylinder portion 52 pivotally supported by a fixed portion 55 fixed to the seat back frames 41, 41 (see FIG. 3).
The rod portion 53 is pivotally supported by a swing lever 54 protruding from the central rotating portion 29. Accordingly, the two seat frames 42, 42 are integrally formed by the connecting frame 45, and further connected to the clamp cylinder 51 via the rotating portion 29 supported by the rotating shaft 28, and swing by the operation of the clamp cylinder 51. It is configured to be.

The operation of inserting the front seats 2, 2 and the rear seat 3 by the seat insertion device 1 having such a configuration will be described. FIG. 10 is a partial external perspective view showing a simplified state when the front seats 2 and 2 are inserted. Therefore, the seat insertion step is first performed after the front seats 2 and 2 are inserted. Front seats 2, 2
Are arranged at intervals when assembled in the vehicle body 10, and the operator rotates the handle 25 to tilt the holding bracket 30 forward, and slides the holding bracket 30 forward from the top into the front seats 2. The front seats 2, 2 are held in a state as shown in FIG.

The holding bracket 30 is located at such a holding position.
Is arranged, the cylinder 2 is inserted into the stop hole of the rotating plate 24.
6 is inserted, and the holding bracket 30 in the holding state is inserted.
Is fixed to the fixing tube 22. Therefore, the rear corners of the front seats 2 and 2 have the seat back frame 3
The seat back 2a is supported by the support rollers 33, 33 so as to be held down by the support rollers 33, 33 so that the seat back 2a is supported by the seat frames 1, 31 and the seat frames 32, 32 so as not to fall forward (to the left in FIG. 2). At this time, the seat frames 42, 42 for holding the rear seat 3 are flipped upward as shown in FIG. 2 so as not to hinder the insertion of the front seats 2, 2. This is because the rod 53 of the clamp cylinder 51 is protruded, whereby the rotating shaft 28 rotates via the swing lever 54, and the seat frames 42, 42 swing accordingly, and are fixed at the positions shown in the figure. .

The front seats 2, 2 held by the holding bracket 30 in this manner have a moving handle 21 a provided on the base shaft 21, and the front seats 2, 2 are moved into the vehicle body 10 by the force of the balancer 61. It is thrown by the throw operation. That is, the front seats 2 and 2 of the seat insertion device 1 are:
As shown in FIG. 10, the vehicle body 10 is loaded on a transport line (not shown) and fed through the mounting opening 11 of the rear door. Then, when the front seats 2, 2 enter the vehicle body 10, the front seats 2, 2 are moved in parallel to the front side. The front seats 2, 2 sent to the front side are installed at predetermined mounting positions (see FIG. 4), and are fixed to the vehicle body 10 by bolting or the like. Thereafter, the operator again removes the pin of the cylinder 26 from the rotary plate 24, and the rotatable holding bracket 30 is released.
By operating the handle 25, the support bracket 30 is pivotally moved forward (counterclockwise in the drawing) about the rotation shaft 23, and is lifted up to remove the whole from the front seats 2, 2.

Next, the operation of inserting the rear seat 3 into the vehicle body 10 will be described. The rear seat 3 is placed on the line side when assembled in the vehicle body 10, and the operator holds the rear seat 3 with the seat insertion device 1 removed from the front seats 2. That is, the operator sets the angle of the swingable holding bracket 30 to the handle 2.
5, the rotating plate 24 is pinned by the cylinder 26 to fix the position of the holding bracket 30. Also, the seat frame 4
The rods 2 and 42 are in a state where the rod 53 of the clamp cylinder 51 is retracted toward the cylinder 52 and opened as shown by a broken line in FIG.

The operator first lowers the seat back frames 41, 41 with respect to the rear seat 3 from above.
The return plate 41a is attached to the head of the seat back 3a by the support plate 43.
To fit along. And the clamp cylinder 51
, The rod 53 is protruded to swing the seat frame 42, and as shown by the solid line in FIG. Supported by. Therefore, the rear seat 3 is held such that the head of the seat back 3a and the front part of the seat 3b are grasped.

By the way, the clamp cylinder 51 for operating the swinging position of the seat frames 42, 42 is used when the front frames 2, 2 are inserted into the seat frames 42, 42 (FIG. 2) and before the rear seat 3 is held (FIG. 3). The protruding amount of the rod 53 is controlled so as to change into three patterns (broken line) and after the rear seat 3 is held (solid line in FIG. 3).

The rear seat 3 held by the holding bracket 30 as described above is held by the operator by holding the moving handle 21a provided on the base shaft 21 and being loaded into the vehicle body 10 by the force of the balancer 61. It is thrown. That is, the rear seat 3 is also attached to the vehicle body 10 in which the front seats 2 and 2 are inserted, with respect to the mounting opening 11 of the rear door.
It is thrown in from. And the rear seat 3 is the vehicle body 1
0, the rear seat 3 is shifted rearward as shown in FIG. 4, where the rear seat 3 is installed at a predetermined mounting position, and is fixed by bolting or the like. The seat frame 42 is removed, and then the seat back frame 41 is also removed, and the holding bracket 30 of the seat insertion device 1 is taken out of the vehicle body 10.

As described above, according to the seat insertion device 1 of the present embodiment, since the front seats 2 and 2 can be inserted into the vehicle body 10 at one time, the operation time can be greatly reduced. And improved productivity. In addition, since the front seats 2, 2 and the rear seat 3 can be inserted into the vehicle body 10 by one seat input device, the equipment cost can be reduced, and the front seat side can be reduced. The assembling could be completed by a total of two loading operations, one time and one time on the rear seat side, and the time required for the operation was reduced to less than half of the conventional case, and productivity was remarkably improved. Also,
Since the two front seats 2 can be inserted into the vehicle body 10 at a time, there is no need to provide left and right seat insertion devices as in the related art, and the cost of production equipment can be reduced in that respect. Became.

In the seat insertion device 1 of the present embodiment, the configuration of the holding bracket 30 is different from that of the first holding mode.
Seat back 2a. The rear corners of the seat 2a and the seats 2b, 2b are supported, and the front surfaces of the seat backs 2a, 2a are pressed. In the second holding mode, the head of the seat back 3a and the front of the seat 3b are supported. For this reason, for example, the front seats 2, 2 and the rear seat 3 are placed one by one such that the seat back frame 41 used for holding the rear seat 3 is arranged between them so as not to interfere with holding the front seats 2, 2. It could be handled with a single seat loading device. Further, when the front seats 3 and 3 are to be inserted as in the above-described embodiment, the inside of the vehicle body is sent forward to determine the position.
When a method of feeding and positioning the rear inside the vehicle body is adopted, the front brackets 2 and 2 are held from the rear and the rear seat 3 is held from the front. It is possible to easily perform the operation of detaching and removing it from the mounting opening 11 of the rear door.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the description has been given of the case of the vehicle having the front and rear two rows of seats 2 and 2 and the rear seat 3, but the present invention can be applied to the third row of the front and rear three rows of vehicles.

[0033]

The present invention relates to a method for inserting a front seat into a vehicle body having a rear door, wherein two front seats constituting a driver's seat and a passenger seat are simultaneously held at a fixed interval, and the rear door is closed. 2 from the mounting opening
After the front seat of the leg is inserted, the inside of the vehicle body is moved to the mounting position of the front portion of the vehicle body, so that it is possible to provide a seat insertion method in which two front seats can be inserted at a time. Was.

Further, the present invention is characterized in that the front seat is fixed to an operation means capable of turning and operating in the up and down direction and can be inserted into a predetermined mounting position in the vehicle body while holding the front seat. A support shaft having a length corresponding to two legs of the driver's seat and the passenger's seat is provided in parallel with the front seat mounting surface of the vehicle body, and is rotatable around its axis. Since the holding member for holding the front seat is provided at each of two positions on the driver's seat side and the passenger seat side with respect to the support shaft, it is possible to provide a seat insertion device which can insert two front seats at once. It has become possible.

Further, according to the present invention, the holding portion provided on the support shaft forms two types of holding forms by rotation of the support shaft. Since the rear seat is configured to be held in the holding mode, it is possible to provide a seat insertion device that can insert the front seat and the rear seat into the vehicle body by one vehicle. Further, according to the present invention, the first holding mode formed by the holding section supports the back corners of the seat and the backrest constituting the front seat, and presses the backrest front surface, and the second holding mode is a rear seat. Since the backrest head and the front part of the seat are supported, the front seat and the rear seat are held from the rear and the rear seat is held from the front even when the front and rear seats are loaded by one unit. In this case, it is also possible to provide a seat loading device in which the holding member can be easily removed from the seat.

[Brief description of the drawings]

FIG. 1 is a side view showing a balancer 61 on which a seat insertion device is mounted.

FIG. 2 shows a front seat 2 with a rear door mounting opening 11;
FIG. 2 is a side view showing the seat insertion device 1 in a state of being inserted from the front.

FIG. 3 is a side view showing the seat insertion device 1 in a state where the rear seat 3 is inserted through a mounting opening 11 of the rear door.

FIG. 4 is a diagram showing a positional relationship between a front seat 2 and a rear seat 3 with respect to a mounting opening 11 of the rear door.

5 is a view of the seat insertion device 1 of FIG. 2 holding a front seat as viewed from the direction of arrow A when viewed from the front.

FIG. 6 is a view of the seat insertion device 1 of FIG. 2 holding a front seat as viewed from an arrow B when viewed from above.

FIG. 7 is a view showing a rotary plate 24 with a handle 25;

8 is a view as viewed in the direction of the arrow C when the seat insertion device 1 of FIG. 3 holding the rear seat is viewed from the front.

FIG. 9 is a view of the seat insertion device 1 of FIG. 3 holding a rear seat, as viewed from an arrow D when viewed from above.

FIG. 10 is a partial external perspective view showing a simplified situation when a seat is inserted.

FIG. 11 is a partial external perspective view showing a simplified situation when a seat is inserted by a conventional seat insertion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat loading apparatus 2 Front seat 3 Rear seat 10 Vehicle body 11 Rear door mounting opening 27 Support tube 28 Rotation axis 30 Holding bracket 31 Seat back frame 32 Seat frame 33 Support roller 41 Seat back frame 42 Seat frame 51 Clamp cylinder 61 Balancer

Claims (4)

[Claims] 1. A method of inserting a front seat into a vehicle body having a rear door, wherein two front seats constituting a driver seat and a front passenger seat are simultaneously held at a fixed interval, and the front seat is opened from a mounting opening of the rear door. A method for inserting a seat, comprising inserting a two-legged front seat and moving the inside of the vehicle body to a mounting position at a front portion of the vehicle body. 2. A driving device comprising a front seat, wherein the driving device comprises a front seat which is fixed to operation means capable of turning and operating in a vertical direction, and which can hold a front seat and can be inserted into a predetermined mounting position in a vehicle body. A support shaft having a length corresponding to two legs of a seat and a passenger seat is provided in parallel with a front seat mounting surface of a vehicle body and is rotatable around its axis. Wherein the holding member is provided at two positions on the driver's seat side and the passenger's seat side with respect to the support shaft. 3. The seat insertion device according to claim 2, wherein the holding portion provided on the support shaft forms two types of holding modes by rotation of the support shaft, and the first holding mode includes: A seat loading device for holding a front seat and holding a rear seat in a second holding mode. 4. The seat insertion device according to claim 2, wherein the holding portion supports the backrest constituting a front seat and a back corner portion of the seat, and the backrest forms a first seat. A seat loading device for holding a front surface, wherein the second holding form supports a backrest head and a seat front part constituting a rear seat.