JP2005238945A - Seat installation device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate delivery of a seat for a vehicle into a vehicle body, and to smooth the positioning to the attachment part on the vehicle body side. <P>SOLUTION: A holding device 14 is a member constituted mainly by a base part 34, a horizontal shaft 35, an arm member 36, a reinforcing plate 38, an insertion member 39, a means 41 of rotating the insertion member, a controlling member 42, and a means 44 of driving an arm. The horizontal axis is fixed to a side plate member 33 of the base part 34, and the arm member is installed in the periphery of the horizontal shaft 35 with flexible rotation. Then the reinforcing plate is extended from a lower end part 36a of the arm member 36, and the insertion member is installed on both the right and left ends of the reinforcing plate 38. Then the means of rotating the insertion member is installed at the base of the reinforcing plate 38, and the controlling member, which is installed at the base of the reinforcing plate 38, plays the part of controlling an inserted amount of the seat 29. Then the means of driving the arm is installed on an upper end part 36b of the arm member through a driving shaft 43. A bracket plate member 46 is installed at the end part of an upper plate member 32 of the base part, and the means 44 of driving the arm is installed at the head 46a of the bracket plate member. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle seat mounting apparatus used when a vehicle seat is gripped by a gripping device attached to the tip of a transfer lifting device, the vehicle seat is carried into the vehicle body, and the vehicle seat is attached to the vehicle body. It is about.

2. Description of the Related Art Conventionally, a vehicle comprising a transfer lifting device, an insertion member that is inserted into a mounting sheet at the front end of the transfer lifting device and receives a load of the sheet, and a sheet gripping device that includes a sheet regulating member that regulates the side surface of the sheet. A sheet mounting apparatus is known (for example, see Patent Document 1).
JP 2002-274454 A (FIG. 6)

Patent document 1 is demonstrated based on the following figure.
FIG. 12 is a diagram for explaining the basic configuration of the prior art. A sheet gripping device 101 forming a part of a vehicle seat mounting device includes a base plate 102 connected to the tip of a transfer lifting device, and the base plate. The left and right insertion members 103L and 103R that are rotatably attached to 102, the bent portions 104 and 104 added to the tips of these insertion members 103L and 103R, and the attachment members 103L and 103R that are attached to the base plate 102 are rotated. This is an apparatus provided with a rotating means 105 and a sheet restricting member 106 extended from the base plate 102.

  The left and right insertion members 103L and 103R are inserted between the backrest 108 and the seat portion 109 of the vehicle seat 107 and rotated by a predetermined angle (approximately 45 °) by the rotating means 105, so that the bent portions 104 and 104 are on the backrest 108 side. The vehicle seat 107 is gripped by the insertion members 103L and 103R and the seat regulating member 106.

  In order to grip the vehicle seat 107, the seat 107 is gripped without being folded, and is carried into the vehicle body and positioned, that is, the seat 107 is mounted on the vehicle body. As a result, a larger space is required as compared with the case where the seat 107 is mounted in a folded state. In addition, when the seat 107 is mounted and the seat 107 is attached, there is a restriction that the gripped seat 107 cannot be tilted so that the positioning and attachment work on the vehicle body side can be easily performed.

  If the seat 107 can be made more compact, the space required for mounting the seat 107 can be reduced, interference with other members can be reduced, the seat 107 can be easily mounted, and mounting workability is improved. Good connection.

  Therefore, an object of the present invention is to facilitate the carrying-in of the vehicle seat into the vehicle body and to facilitate the positioning to the vehicle body side attachment portion.

  The invention according to claim 1 is a vehicle seat mounting device that is mounted inside a vehicle while being gripped by a gripping device disposed in a transfer means for transferring a vehicle seat composed of a backrest and a seat. The gripping device is arranged such that a base attached to the arm member of the transfer means, an arm member attached to the base so as to be tiltable around a horizontal axis, and inserted between the backrest and the seat at the lower end of the arm member. It is characterized by comprising left and right insertion members provided, drop-off prevention means formed at the tip portions of these insertion members, and tilt control means for tilting the insertion member from the horizontal to a predetermined tilt angle.

The left and right insertion members are inserted between the backrest and the seat so that they can be inserted, and the arm member is attached to the insertion member so that it can tilt around the horizontal axis, so the seat back can be folded in the folded state. An insertion member is inserted between the seat and the seat portion, the insertion member is tilted via the arm member, and the seat can be easily held at a position having a predetermined inclination and positioned at the predetermined position.
Therefore, since the folded sheet can be conveyed in a folded state, the sheet can be made compact, the sheet can be prevented from interfering with other members during conveyance, and the moment of inertia of the sheet is reduced, so that the carrying-in operation can be performed easily. Can do.
In addition, since the insertion member is tilted, the seat can be easily positioned at the assembly position on the vehicle body side.
As a result, it is possible to simply and reliably carry in and position the seat into the vehicle.

  In the invention according to claim 2, the insertion portion is constituted by an insertion member and a reinforcing plate attached to reinforce the insertion member, and a restriction member for restricting the insertion amount of the vehicle seat is positioned on the reinforcement plate. It is characterized by being adjustable.

Since the load of the seat is supported by the left and right insertion members and the reinforcing plate provided between the insertion members via the left and right holder parts, the area that receives the load is smaller than the case of supporting only by the insertion members. Can be taken widely.
Since the area that receives the load is increased, the posture of the seat can be stably maintained when the insertion member is moved and tilted.
In addition, since the insertion member is supported by the reinforcing plate, there is no possibility that problems such as bending of the insertion member occur due to the load of the sheet even if the insertion member is used for a long period of time.
As a result, the seat can be mounted on the vehicle body in a stable posture and can be used for a long period of time.

  According to a third aspect of the present invention, the tilt control means is tilted by the weight of the vehicle seat by controlling by an air cylinder that tiltably drives the arm member and a decompression adjusting means that adjusts the pressure inside the air cylinder. The stopper means for holding the arm member at a position where the arm member is tilted at a predetermined tilt angle is arranged on the base so that the tilt angle can be adjusted.

Since the arm member and the insertion member are tilted downward by utilizing the weight of the sheet, it is not necessary to supply air during the positioning operation.
As a result, air consumption can be saved and energy saving can be achieved.
In addition, since the inclination angle of the insertion member can be adjusted by the decompression adjusting means, the insertion member can be set to an optimum inclination angle for assembling the seat in accordance with the inclination of the vehicle body side bracket.
As a result, the vehicle seat mounting operation can be performed more smoothly.

  In the invention according to claim 1, since the insertion member can be inserted into the folding sheet and can be tilted, and the folding sheet is folded and transported, the sheet can be carried into the vehicle and positioned easily and reliably. There is an advantage that can be.

  In the invention according to claim 2, since the load of the seat is supported by the left and right insertion members and the reinforcing plate that reinforces these insertion members, the advantage that the seat can be smoothly mounted on the vehicle body for a long period of time. There is.

In the invention according to claim 3, since the arm member and the insertion member are tilted downward by utilizing the weight of the seat, it is possible to save consumption of air as a driving source of the arm member and to save energy. There are advantages.
In addition, since the inclination angle of the insertion member can be adjusted, there is an advantage that the work of mounting the vehicle seat on the vehicle body can be performed more smoothly.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a front view of a vehicular seat mounting apparatus according to the present invention. A vehicular seat mounting apparatus 10 is movably mounted in a left-right direction in the figure via a rail 11a lowered from a ceiling portion 11. FIG. And a gripping device 14 attached to the distal end portion 13 of the transfer means 12.

  The transfer means 12 includes a base portion 15 attached to the ceiling portion 11 so as to be movable in the left-right direction in the figure, a third arm member 16 attached downward to the base portion 15, and a connecting member 17 from the third arm member 16. A second long arm member 18 extending obliquely downward via the connecting member 17, a second arm member 21 attached to the tip 19 of the second long arm member via a connecting member 17, and a connecting member connected to the lower portion 22 of the second arm member. A first long arm member 23 attached via 17 and a first arm member 25 provided on the distal end portion 24 of the first long arm member via a connecting member 17. Hereinafter, the first arm member that forms the tip of the transfer means 12 is referred to as an arm member 26.

The arm member 26 to which the gripping device 14 is attached becomes a member that can be expanded and contracted in the vertical direction and the horizontal direction by the connecting members 17 (... indicates a plurality, the same applies hereinafter).
Similarly, the arm member 26 includes a third rotation shaft portion 16 a included in the third arm member 16, a second rotation shaft portion 21 a included in the second arm member 21, and a first rotation included in the first arm member 25. The shaft portion 25a is a rotatable member.

That is, the vehicle seat mounting apparatus 10 includes a transfer means 12 that allows the arm member 26 for attaching the gripping device 14 to expand and contract, move and rotate freely in the vertical and horizontal directions, and the transfer means 12 at the tip of the transfer means 12. The vehicle seat 29 is mounted inside the vehicle body by working with the gripping device 14 that is installed and grips the vehicle seat 29.
Here, the vehicle seat 29 that is transferred by the transfer means 12 and gripped by the gripping device 14 and mounted inside the vehicle body is a member composed of a backrest 27 and a seat portion 28.

  FIG. 2 is an enlarged view of two parts in FIG. 1. The gripping device 14 includes a base 34 composed of an upper member 31, an upper plate member 32, and a side plate member 33, and a horizontal plate fixed to the side plate member 33 of the base 34. A shaft 35, an arm member 36 that is rotatably attached around the horizontal shaft 35, a reinforcing plate 38 that extends from the lower end 36 a of the arm member, an insertion member 39 that is attached to the reinforcing plate 38, and a reinforcing plate 38, a rod member of the arm drive means 44 attached to the upper end portion 36b of the arm member via the drive shaft 43. 45 and the arm drive means 44 are main components.

  A bracket plate member 46 is attached so as to extend from the distal end portion of the upper plate member 32 of the base portion 34, and the arm driving means 44 is attached via a bracket main body 47 lowered from the distal end portion 46a of the bracket plate member. 48 is a decompression adjusting means, and 49 is a decompression switch.

  The insertion member 39 is inserted between the backrest 27 and the seat portion 28 of the vehicle seat 29 and supports the seat 29. In addition, it is possible to prevent the displacement of the sheet 29 during conveyance by providing a drop prevention means 51 at the distal end portion 39a of the insertion member and sandwiching the sheet 29 between the drop prevention means 51 and the regulating member 42.

  That is, the gripping device 14 includes a base 34 attached to the arm member 26 of the transfer means 12, an arm member 36 attached to the base 34 so as to be tiltable about a horizontal axis 35, and a lower end 36a of the arm member 36. Left and right insertion members 39 disposed so as to be insertable between the backrest 27 and the seat portion 28, drop-off prevention means 51 formed at the distal end portions 39a of these insertion members 39, and the inclination of the insertion member 39 from the horizontal to a predetermined level The tilt control means 52 tilts to the tilt angle.

  3 is a view taken in the direction of the arrow 3-3 in FIG. 2, and the gripping device 14 has an operation handle 53 attached to the outer side portions 33a and 33a of the left and right side plate members 33 and 33 constituting the base. A decompression switch 49 and an insertion member rotation switch 55 are attached to the center.

  Further, the reinforcing plate 38 is extended from the arm member 36 to the left in the figure, and the left and right insertion members 39 are rotatably attached to the left and right of the reinforcing plate 38 via the holder portions 56. A regulating member 42 that regulates the amount of insertion (see FIG. 2) is provided so that the position can be adjusted in the sheet insertion direction.

  Since the load of the seat 29 (see FIG. 2) is supported by the left and right insertion members 39 and the reinforcing plate 38 provided between the insertion members 39 via the left and right holder portions 56, the insertion member 39 alone is used. Compared with the case where it supports, the area which receives a load can be taken widely.

Since the area that receives the load is increased, when the insertion member 39 is moved and tilted, the seat 29 (see FIG. 2) can be held in a stable posture.
In addition, since the insertion member 39 is supported by the reinforcing plate 38, there is no possibility that problems such as bending of the insertion member 39 due to the load of the sheet 29 occur even if the insertion member 39 is used for a long period of time.
As a result, the seat 29 can be mounted on the vehicle body in a stable posture and smoothly over a long period without worrying about problems due to aging of the insertion member 39.

4 is a cross-sectional view taken along line 4-4 of FIG. 3, and shows that the insertion member 39 is rotatably attached via the holder portions 56 attached to the left and right of the reinforcing plate 38. FIG.
That is, the insertion portion 57 is composed of left and right insertion members 39 and a reinforcing plate 38 that is connected to reinforce these insertion members 39.
Therefore, the reinforcing plate 38 and the insertion member 39 can be moved together without being separated, and the sheet 29 (see FIG. 2) can be stably supported.

5 is a cross-sectional view taken along line 5-5 of FIG. 2, and the horizontal shaft 35 is passed through the fitting hole 61a that forms the horizontal shaft fitting portion 61 provided in the arm member 36, and outside the horizontal shaft fitting portion 61. The side plate members 33, 33 are passed through the spacers 62, 62, and stoppers 63, 63 are attached outside the side plate members 33, 33 so that the horizontal shaft 35 is not detached from the side plate members 33, 33.
In order to rotate the left and right insertion members 39, 39 on the reinforcing plate 38, the insertion member rotation means 41, 41 are attached.

Returning to FIG. 2, the drop-off prevention means 51 formed at the distal end portion 39 a of the insertion member 39 is formed to be bent obliquely upward in the figure, so that the side surface of the sheet 29 can be connected to the regulating member 42 provided in the reinforcing plate 38. It is possible to regulate and firmly hold the sheet 29.
In order to cancel the restriction of the seat 29, the left and right insertion member rotating means 41 are driven, and the drop prevention means 51 is directed in the direction indicated by the imaginary line in the figure.
In the figure, the restriction in the direction of the arrow A can be released by changing the direction of the drop-off prevention means 51 attached to the distal end portion of the insertion member 39.

  Returning to FIG. 3, the insertion member rotation switch 55 attached to the operation handle 53 is operated to rotate the left and right drop prevention means 51, so that the drop prevention means 51 is oriented in the direction indicated by the imaginary line in FIG. 3. It is possible to immediately perform the operation from the position where the restriction of a certain sheet is released to the position where the sheet whose direction is indicated by the solid line is restricted, or vice versa.

In this embodiment, the drop-off prevention means 51 is a bent member 64, and the bent member 64 and the insertion member rotating means 41 are combined. And by this combination, the direction of the insertion member 39 is changed to regulate the sheet 29 and prevent the sheet 29 from falling off.
The dropout prevention means 51 is not limited to the above-described structure. For example, by using a balloon-shaped rubber elastic body at the distal end of the insertion member 39 and a mechanism for expanding the rubber elastic body, the seat 29 may be regulated by the expanded rubber elastic body.

FIG. 6 is a view for explaining the seat tilting mechanism.
The arm driving means 44 that tilts integrally with the insertion member 39 includes an air cylinder 65 serving as a driving source, a tilt control means 52 that regulates the stroke of the air cylinder 65 by controlling the pressure inside the air cylinder 65, and The arm member 36 attached to the rod 65a of the air cylinder, and the stopper that is attached to the base 34 so that the arm member 36 abuts and holds the inclination angle of the insertion member 39 that integrally tilts with the arm member 36 at a predetermined inclination angle. Means 66, and a sheet mounting apparatus characterized by comprising:

  That is, the tilt control means 52 is mainly composed of an air cylinder 65 that drives the arm member 36 so as to be tiltable, and a decompression adjustment means 48 that controls the pressure inside the air cylinder 65. Then, the arm member 36 can be tilted by its own weight of the vehicle seat 29, and the stopper means 66 for holding the arm member 36 is disposed on the base 34 so that the tilt angle can be adjusted at a position where the arm member 36 tilts to a predetermined tilt angle. Set up.

FIG. 7 is an explanatory view of the tilt control means according to the present invention.
In (a), the rod 65a of the arm drive means is in the most extended state, and indicates that the seat 29 is supported by the insertion member 39, the drop-off prevention means 51, and the restriction member 42.
At this time, air enters the left chamber 72 of the piston 73 of the air cylinder 65 and pushes the piston 73 to the right side of the drawing by the direction control valve 71 that controls the inclination direction of the arm member 36 and the insertion member 39. Held in the direction.

  In (b), the rod 65a of the arm driving means 44 is in the most contracted state, and the arm member 36 and the insertion member 39 integrated with the arm member 36 are tilted to open the seat 29. That is, the directional control valve 71 is switched by operating the pressure reducing switch 49, the left chamber 72 of the piston 73 of the cylinder 65 is connected to the pressure reducing valve 74 side, and air is discharged from the left chamber 72 through the pressure reducing valve 74 to the outside. It can be so.

  At this time, the insertion member 39 is gradually tilted by the directional control valve 71 for controlling the degree of inclination of the insertion member 39 and the pressure reducing valve 74 and the dropping prevention means 51 is released, so that the seat 29 has its own weight. It moves smoothly in the direction of the arrow B in the figure.

After the seat 29 moves in the direction indicated by the arrow B and is disengaged from the gripping device 14, the pressure reducing switch 49 is operated to return the directional control valve to the position shown in FIG. The insertion rod 65a is in the most extended state.
As a result, the insertion member 39 returns to the horizontal state.

Since the arm member 36 and the insertion member 39 are tilted downward using the weight of the seat 29, it is not necessary to supply air during the positioning operation.
As a result, air consumption can be saved and energy saving can be achieved.

In addition, since the inclination angle of the insertion member 39 can be adjusted by the decompression adjusting means 48, the insertion member 39 can be set to an optimum inclination angle for assembling the seat 29 according to the vehicle body side bracket. In the present embodiment, the decompression adjusting means 48 employs the decompression valve 74, but is not limited thereto.
As a result, the vehicle seat mounting operation can be performed more smoothly.

Hereinafter, the operation of the vehicle seat mounting apparatus according to the present invention will be described.
FIG. 8 is an operation diagram showing a state where the vehicle seat is gripped and a state where the gripped vehicle seat is carried into the vehicle body.

  In (a), the worker P is placed on another type of sheet 78 on the line-side sheet conveyor 77, and has an operation handle 53 for the folding sheet 29 to be mounted, and the vehicle of the present invention. The seat mounting apparatus 10 is brought close, an insertion member 39 is inserted between the backrest 27 and the seat portion 28, and the dropping prevention means 51 provided at the distal end portion of the insertion member 39 is directed toward the side where the seat 29 is regulated to regulate the seat 29. And lift.

  In (b), the worker P indicates that the sheet 29 integrated with the gripping device 14 is carried into the vehicle body V moving at a predetermined speed on the assembly line using the transfer means 12.

FIG. 9 is an operational view of the vehicle seat mounting device showing a state where the vehicle seat is tilted and a state where the vehicle seat is positioned on the mounting bracket.
In (a), the worker P indicates that the insertion member 39 is tilted by the tilt control means 52 to bring the seat 29 closer to the seat mounting bracket 81 on the vehicle body V side.

In (b), the worker P indicates that the operation handle 53 is moved while the tilt control means 52 is in effect, and the tightening hole portion of the seat 29 is positioned in the seat mounting bracket 81 on the vehicle body V side.
In this state, the seat 29 is attached to the vehicle body V by joint work with another worker (not shown) disposed inside the vehicle body. Reference numeral 82 denotes a tightening bolt.
The seat mounting operation will be described in detail with reference to FIG.

According to the seat mounting apparatus 10 of the present invention, in a state where the folding sheet 29 is folded, the insertion member 39 is inserted between the backrest 27 of the seat 29 and the seat portion 28, and the insertion member 39 is inserted via the arm member 36. By tilting, the sheet 29 can be easily held at a position having a predetermined inclination and positioned at a predetermined position.
In addition, since the insertion member 39 is tilted, it is easy to position the seat 29 on the seat mounting bracket 81 on the vehicle body V side.

Since the folded sheet 29 can be conveyed in a folded state, the sheet 29 can be made compact, the possibility that the sheet 29 will hit another member during conveyance is reduced, the moment of inertia of the sheet 29 is reduced, and the carrying-in operation can be performed easily. Can do.
As a result, it is possible to easily and reliably carry in and position the seat 29 into the vehicle body.

FIG. 10 is an operation diagram showing a state in which the vehicle seat is attached to the mounting bracket.
(A) is the figure which looked at the seat attachment bracket attached to the vehicle body side, when facing a tailgate opening part from the inner side of a vehicle body.

The seat mounting bracket 81 includes a bracket shaft 83 that is rotatably provided on the inner side in the horizontal direction from the inner wall of the vehicle body, and a bracket member 84 that is mounted on the tip of the bracket shaft 83.
Reference numeral 85 denotes a seat belt.

FIG. 9B shows a state in which the seat mounting bracket 81 is aligned with the tightening hole portion of the seat 29 positioned in FIG. 9, and another operator P2 bolts the nut runner 86.
Therefore, the sheet 29 that the worker P has carried in and positioned in the vehicle body can be mounted smoothly and reliably in a limited time by joint work with another worker P2.

FIG. 11 is an operational view of the vehicle seat mounting device showing a state where the insertion member is pulled out and a state where the attachment of the vehicle seat is completed.
In (a), the operator P operates the insertion member rotation switch provided on the operation handle 53 while releasing the operation handle 53 to release the drop-off preventing means 51 and moves the operation handle 53 in the direction C in FIG. The insertion member 39 is removed from the seat 29 by pulling to.

  In (b), it shows that the installation of the vehicle seat is completed. At this time, the seat mounting apparatus 10 is oriented approximately 90 ° with respect to the seat mounting direction, retracted to the right side of the figure, and in a state of waiting to mount the next vehicle seat on the production line. is there.

  In the present embodiment, the arm driving means and the insertion member driving means of the seat mounting assist device of the present invention employ air cylinders, but are not limited to air cylinders. For example, driving means using an electric actuator or an electric motor may be used.

  The vehicle seat mounting apparatus of the present invention is suitable for mounting a seat on a vehicle.

1 is a front view of a vehicle seat mounting apparatus according to the present invention. FIG. 2 is an enlarged view of part 2 of FIG. 1. FIG. 3 is a view taken along arrow 3-3 in FIG. 2. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a figure explaining a sheet tilting mechanism. It is explanatory drawing of the tilt control means which concerns on this invention. It is an operation view of the vehicle seat mounting device showing a state of gripping the vehicle seat and a state of carrying the gripped vehicle seat into the vehicle body. It is an effect | action figure of the vehicle seat mounting apparatus which shows the state which tilted the vehicle seat, and the state positioned to a mounting bracket. It is an effect | action figure which shows the state which attaches a vehicle seat to a mounting bracket. It is an effect | action figure of the vehicle seat mounting apparatus which shows the state which the state which withdraws an insertion member, and the attachment of the vehicle seat is completed. It is a figure explaining the basic composition of the prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle seat mounting apparatus, 12 ... Transfer means, 14 ... Holding apparatus, 27 ... Backrest, 28 ... Seat part, 29 ... Vehicle seat, 34 ... Base part, 35 ... Horizontal axis, 36 ... Arm member, 38 ... Reinforcing plate, 39 ... insertion member, 39a ... tip end of insertion member, 42 ... regulating member, 51 ... drop-off prevention means, 52 ... tilt control means, 56 ... holder part, 57 ... insertion part, 65 ... air cylinder, 66 ... Stopper means, 67 ... decompression adjusting means.

Claims (3)

In the vehicle seat mounting device that is mounted inside the vehicle body while being gripped by the gripping device disposed in the transfer means for transferring the vehicle seat composed of the backrest and the seat,
The gripping device includes a base attached to an arm member of the transfer means;
An arm member attached to the base so as to be tiltable about a horizontal axis;
Left and right insertion members arranged to be inserted between the backrest and the seat at the lower end of the arm member,
Drop-off prevention means formed at the tip of these insertion members,
Tilt control means for tilting the insertion member from horizontal to a predetermined tilt angle;
A vehicle seat mounting device characterized by comprising: The insertion portion is composed of left and right insertion members and a reinforcing plate attached to reinforce these insertion members,
The vehicular seat mounting device according to claim 1, wherein the reinforcing plate is provided with a regulating member that regulates an insertion amount of the vehicular seat so that the position thereof can be adjusted. The tilt control means includes an air cylinder that tiltably drives the arm member;
By controlling the pressure inside the air cylinder by the decompression adjusting means, it is possible to tilt by the weight of the vehicle seat,
3. The vehicle according to claim 1, wherein a stopper means for holding the arm member is disposed at the base portion so that the tilt angle can be adjusted at a position where the arm member is tilted at a predetermined tilt angle. Seat mounting device.

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