JP2001341557A - Hinged seat and manufacturing method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinged seat that is effectively manufacturable due to a reduced number of parts, and a manufacturing method for the hinged seat. SOLUTION: The manufacturing method for the hinged seat comprises a step for arranging a bracket 3 with collar mounting holes 11 and collars 14 in place in a die and effecting injection molding to mount the collars 14 in the collar mounting holes 15 of the bracket 3 via a resin, a step for injection- molding a bottom plate 1 with a bearing portion 6 in place and with a mount portion 5 adjoining the bearing portion 6, and forming an insertion hole 7 in that place on the side of the bottom plate 1 which is on an extension line to the bearing portion 6, and a nut-fastening step for inserting a shaft 4 with a threaded portion 21 at an end in the bearing portion 6 of the bottom plate 1 and a shaft hole 9 of the bracket 3 via the insertion hole 7 and screwing the threaded portion 21 of the shaft 4 into a nut portion 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinged seat and a method of manufacturing the same, and more particularly, to an improvement of a hinged seat and a method of manufacturing the same.

[0002]

2. Description of the Related Art Some vehicle seats are formed so as to be openable and closable with a vehicle body side via a hinge. For example, taking a motorcycle as an example of a vehicle seat, the seat is formed by forming a cushion material on a bottom plate (bottom plate) 31, covering the cushion material with a skin material, and forming a terminal portion of the skin material with the bottom plate 31. It is formed by joining. A hinge 32 shown in FIG. 9 is provided at a predetermined position between the bottom plate 31 and the vehicle body, and the hinge 32 allows the seat to rotate with respect to the vehicle body and be opened and closed. .

[0003] Through the hinge 32, the bottom plate 3
In the method of manufacturing a seat having a conventional hinge for attaching the hinge 1 to the vehicle body side, a step of forming the bottom plate 31 by inserting an attachment part 53 for attaching the hinge 32 shown in FIG. 9 and a step of assembling the hinge 32; As shown in FIG. 10, the step of attaching the hinge 32 to the bottom plate 31 and the step of attaching the hinge 32 to the vehicle body were performed.

In the step of forming the bottom plate 31 by inserting a mounting part 53 for attaching the hinge 32,
Attachment part 53 (screw part 5) for attaching hinge 32 to the mold
Is inserted, and a predetermined resin is injected into the mold. And cool, open the mold,
The process of taking out and completing the bottom plate 31 of FIG. 8 was performed.

A description will be given below with reference to FIG. In FIG. 9, rubber rubbers (for example, rubbers 45 a to 45 c) are hatched for easy understanding. Hinge 3
In the process of assembling 2, first, the bottom plate side bracket 51 and the vehicle body side bracket 52 shown in FIG. 9 are made of sheet metal. Rubber mounting holes 55 and rubber mounting holes 56 provided in both brackets 51 and 52 are provided with rubbers 45a and 45b.
And the collar 44 are sequentially attached. Next, the shaft 34 having a threaded portion is passed through bolt holes of the bottom plate side bracket 51 and the vehicle body side bracket 52, and the threaded portion is
And the assembly of the hinge 32 was completed.

In the step of attaching the hinge 32 to the bottom plate 31, the screw portion 54 of the attachment part 53 is inserted into the collar 44a of the bottom plate side bracket 51, and a washer is set on the collar 44a, as shown in FIG. The work of squeezing with a nut was done manually. Finally, a hinge-side bracket was attached to the vehicle body to complete the attachment between the seat and the vehicle body.

However, the conventional manufacturing method has the following problems. First, the number of parts for mounting the hinge 32 is four, the mounting parts 53, the bottom plate-side bracket 51, the vehicle-side bracket 52, the shaft 34, the nut 40, the collars 44a and 44c, and the rubbers 45a to 45c.
The number of 45c is 6 points and the number of washers is 4 points, and the mounting of these parts is performed manually, which takes time and labor and is inefficient. As shown in FIG. 10, in order to fix the hinge 32 to the attachment part 53, the nut is tightened from the back side of the bottom plate 31. Therefore, the nut cannot be tightened by automation. I was going.

Therefore, the step of attaching the bottom plate 31 and the vehicle body side via the hinge 32 requires two times a day.
Approximately three people are required to attach 40 units, and reduction in the number of processing steps and automation have been desired. Further, in order to attach the attachment part 53 for attaching the hinge 32 to the bottom plate 31, it is necessary to insert the attachment part when the bottom plate 31 is injection-molded, and this insert cannot reduce the number of processing steps. Had become.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a seat having a hinge which can be efficiently manufactured by reducing the number of parts and a method of manufacturing the same. The aim is to provide a method. Another object of the present invention is to provide a seat having a hinge that can be manufactured by an automated process and a method of manufacturing the same.

[0010]

According to the first aspect of the present invention, there is provided a seat provided with a hinge for opening and closing the seat with respect to a vehicle body, wherein a bottom plate constituting the seat is provided. A bearing portion integrally formed at a predetermined position, a shaft, and a bracket formed with a shaft hole through which the shaft is formed;
A mounting portion formed integrally with the bottom plate in a shape capable of supporting the bracket adjacent to the bearing portion, wherein the shaft is passed through the shaft hole and the bearing portion of the bracket. The problem is solved by forming the hinge. As described above, by providing the bearing portion integrally formed at a predetermined position of the bottom plate, it is not necessary to attach the bottom plate-side bracket which has been attached by the attaching component to the conventional bottom plate side. The number of components for mounting the bottom plate-side bracket and the number of processing steps can be greatly reduced. Further, by providing a mount portion integrally formed on the bottom plate in a shape capable of supporting the bracket adjacent to the bearing portion, when the vehicle body side and the bottom plate are closed by a hinge, the bracket portion is mounted on the mount portion. Can be supported.

At this time, it is preferable that a screw portion is formed at one end of the shaft, and a nut portion that can be screwed to the screw portion is formed at the bracket. With this configuration, in the assembly process of the hinge,
The number of washers and nuts can be reduced, and the number of steps for setting washers and nuts for tightening the nuts can be reduced.

[0012] According to the third aspect of the present invention, a bracket having a collar mounting hole and a collar are arranged at predetermined positions of a mold, injection-molded, and inserted into the collar mounting hole of the bracket. A step of attaching the collar via a resin, and a bottom plate provided with a bearing portion and a mount portion adjacent to the bearing portion at a predetermined position facing the vehicle body at the time of disposition, and injection-molding a bottom plate. A step of forming an insertion hole at a position on a side surface of the bearing portion extending from the bearing portion, and a shaft having a threaded portion at an end portion in the bearing portion of the bottom plate and the shaft hole of the bracket through the insertion hole. And a nut tightening step of screwing the screw portion of the shaft and the nut. In this way, the bracket and the collar are arranged and injection-molded, and the collar is mounted via the resin in the collar mounting hole of the bracket, thereby eliminating the need for a resin component for mounting the collar. The number of parts and the number of processing steps can be reduced. Further, by integrally injection-molding the bottom plate, the bearing portion and the mount portion, there is no need to attach a hinge bracket to the bottom plate side, and the number of parts and the number of processing steps for attaching the hinge can be reduced. Furthermore, an insertion hole is formed at a position on the side surface of the bottom plate on the extension of the bearing portion, and through this insertion hole,
By passing a shaft having a screw portion at an end through the bearing portion of the bottom plate and the shaft hole of the bracket, and performing a nut tightening step of screwing the screw portion and the nut of the shaft. The manufacture of a seat with a hinge can be performed in an automated process.

At this time, it is preferable that a nut portion which can be screwed with the screw portion is previously formed in the shaft hole in the bracket, and the screw portion is screwed to the nut portion in the nut tightening step. is there. With this configuration,
In the hinge assembling process, the number of washers and nuts can be reduced, and the number of steps for setting the washer and nut for tightening the nut can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a seat provided with a hinge 2 for opening and closing the seat with respect to a vehicle body. The seat includes a bearing portion 6 integrally formed at a predetermined position of a bottom plate 1 constituting the seat, a mounting portion 5, a shaft 4, and a bracket 3 having a shaft hole 9 through which the shaft 4 is formed. , Is provided. The mount part 5 is formed integrally with the bottom plate 1 in a shape that can support the bracket 3 adjacent to the bearing part 6. The bracket 3
The hinge 2 is formed by passing the shaft 4 through the shaft hole 9 and the bearing 6. At one end of the shaft 4, a screw portion 21 is formed, and the bracket 3
Is formed with a nut portion 10 which can be screwed to the screw portion 21.

The present invention also relates to a method for manufacturing a seat provided with a hinge. According to the method for manufacturing a seat having a hinge according to the present invention, the bracket 3 having the collar mounting hole 11 is provided.
And a step of disposing the collar 14 at a predetermined position of a mold, performing injection molding, and attaching the collar 14 to the collar attachment hole 15 of the bracket 3 via a resin. A bottom plate 1 having a bearing portion 6 and a mounting portion 5 adjacent to the bearing portion 6 is injection-molded at a position, and an insertion hole is provided at a position on a side surface of the bottom plate 1 on an extension of the bearing portion 6. 7, and passing the shaft 4 having a threaded portion 21 at an end through the insertion hole 7 through the bearing portion 6 of the bottom plate 1 and the shaft hole 9 of the bracket 3. Said screw portion 21;
And a nut tightening step of screwing the nut portion 10 together.

In the bracket 3, a nut portion 10 which can be screwed with the screw portion 21 is formed in the shaft hole 9 in advance, and the screw portion 21 is attached to the nut portion 10 in the nut tightening step. Screw it.

[0017]

An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the present invention.

The seat provided with the hinge of this embodiment is a motorcycle seat, in which a cushion material is formed on a bottom plate (bottom plate) 1, the cushion material is covered with a skin material, and a terminal portion of the skin material is formed as a bottom. It is formed by joining with the plate 1.
The hinge 2 is attached to a back surface of the bottom plate 1, that is, a predetermined position on a surface which is on the vehicle body side when the bottom plate 1 is provided.

The bottom plate 1 is formed of a resin molded product, and as shown in FIG. 1, a mounting portion 5 is provided on the back surface, that is, on the surface on the vehicle body side when the bottom plate 1 is provided.
And a bearing 6 for passing a shaft 4 serving as a swing shaft of the hinge 2
Are integrally formed adjacent to each other. The mounting portion 5 and the bearing portion 6 serve as the bottom plate-side bracket 51 of the conventional example of FIG.

As shown in FIG. 1, the mounting portion 5 has a flat upper surface and a width slightly smaller than the width of the bracket 3 so as to be sandwiched by a bent portion 8 of the bracket 3 described later. Is formed. As shown in FIG. 2, the mounting portion 5 has an arc-shaped concave portion 25 and a bearing portion 6 on the bearing portion 6 side.
, Two concave portions 22 sandwiched between the end-side convex portion 24 and the central convex portion 23 are formed. These recesses 2
When assembled, the hinges 2 and 25 play a role of positioning by fitting with rubbers 15 and 16 of the bracket 3 described later, and further play a role of supporting the bracket 3. As shown in FIG. 1, an insertion hole 7 is formed in the side wall surface of the bottom plate 1 at a position where the bearing 6 is extended to one side. As will be described later, this insertion hole 7 is used for inserting the shaft 4 into the bearing 6 from the side of the bottom plate 1 and inserting an electric driver in the step of tightening the nut.

The hinge 2 has a bracket 3 for fixing it to the vehicle body side and a shaft 4 serving as a swing axis of the hinge as main components. The bracket 3 is formed of a substantially rectangular plate-like body made of sheet metal, and both ends on its short side are bent portions 8 bent perpendicularly to the plate-like body as shown in FIG.
It is formed as. The two bent portions 8 include a shaft 4
Each of the shaft holes 9 for passing through is bored. Of the two shaft holes 9, the shaft hole 9 opposite to the insertion hole 7 of the bottom plate 1 is provided outside the bracket 3 as shown in FIG.
As shown in FIG. 4, the nut part 10 is fixed by welding.

As shown in FIG.
One collar mounting hole 11 and rubber holes 12 and 13 are formed. The collars 14 and the rubbers 15 to 17 are fixed to these holes 11 to 13 by injection molding described later, as shown in FIGS. In FIGS. 5 and 6, rubber rubbers 15 to 17 are hatched for easy understanding. As shown in FIG. 7, the collar 14 is an iron member in which a ring-shaped portion 18 and a cylindrical portion 19 are integrally formed. The collar 14 is fixed to the collar mounting hole 11 by a rubber 15 as shown in FIGS. Rubbers 16 and 17 are provided in rubber holes 1.
2 and 13 respectively.

The bracket 3 and the bottom plate 1 are swingably mounted on a shaft 4. The shaft 4 is made of a rod and has a bolt head 20 at one end as shown in FIG.
A screw portion 21 is provided on the other end side. The shaft 4 is passed through a shaft hole 9 of the bracket 3 and a bearing 6 of the bottom plate 1.
It is fixed by screwing the screw portion 21 to the nut portion 10 of the bracket 3. When the bracket 3 is swingably attached to the bottom plate 1 by the shaft 4, the rubbers 15, 15 of the bracket 3
22 and the rubber 17 is attached to the central convex portion 2 of the mounting portion 5.
3 and the rubber 16 is
5, the bracket 3 is mounted on the mounting portion 5
And is supported on the mount 5. Although not shown, the bracket 3 and the vehicle body side are fixed by tightening nuts with bolts passed through the collar 14 of the bracket 3 so that the seat can be opened and closed with respect to the vehicle body side.

Next, a method of manufacturing a seat having a hinge according to this embodiment will be described. First, the bracket 3 is made of sheet metal. The bent portion 8 of the bracket 3 is bent perpendicularly to the plate-like body. Of the two shaft holes 9 of the bracket 3, the nut portion 10 is fixed to the shaft hole 9 on the opposite side to the insertion hole 7 of the bottom plate 1 by welding to form a nut portion. Next, a step of attaching a collar is performed. First,
The bracket 3 is arranged at a predetermined position of the mold. Color 1
4 is inserted into a position spaced from the collar mounting hole 11 of the bracket 3 by about several mm and the mold is clamped. The resin is injected into the mold, cooled, opened, and removed. In this way, the rubbers 16 and 17 shown in FIGS. 5 and 6 are formed, and the bracket 3 and the collar 14 are fixed via the rubber 15.

Next, a step of injection molding the bottom plate 1 and forming an insertion hole is performed. The resin is injected into the mold, cooled, opened, and removed. At this time, the mount part 5 and the bearing part 6 are integrally formed on the back surface of the bottom plate 1. At the time of injection molding, an insertion hole 7 is formed in the side wall surface of the bottom plate 1 at a position where the bearing 9 is extended to one side. In addition, in order to form the insertion hole 7, the mold is formed so that an undercut does not occur at the portion of the insertion hole 7.
The mold in the vertical direction in FIG. 1 is used. In the present example, the insertion hole 7 is formed at the time of injection molding. However, the invention is not limited to this. The insertion hole 7 may be formed by a cutter or the like after the injection molding of the bottom plate 1.

Next, a nut tightening step is performed. The bracket 3 is arranged on the mounting portion 5 of the bottom plate 1 as shown by an arrow in FIG. The shaft hole 9 of the bracket 3 and the bearing 6 of the bottom plate 1 are aligned. Then, the shaft 4 is passed through the insertion hole 7 of the bottom plate 1 and
Into the nut part 10 by an automatic screwdriver, and after tightening the nut, caulking,
Complete a seat with hinges. Then, bracket 3
Is fixed to a vehicle body (not shown) by a bolt passing through the collar 14.

As described above, according to the seat having the hinge of this embodiment and the method of manufacturing the same, the hinge 2 has three components, one bracket 3 and two collars 14, and an assembly component. Thus, these three points and the shaft 4 make one point, for a total of four points, making it possible to greatly reduce the number of components compared to the seat having the conventional hinge 32 shown in FIG.

Further, according to the seat having the hinge of the present embodiment and the method of manufacturing the same, the nut of the shaft 4 of the hinge 2 is tightened through the insertion hole 7 formed in the side surface of the bottom plate 1. It is possible to manufacture a seat provided with an automatic process. Further, according to the seat having the hinge of this example and the method of manufacturing the same, the bearing 6 and the mount 5 serving as substitutes for the conventional bottom plate-side bracket 51 are formed integrally with the bottom plate 1. Therefore, it is not necessary to insert a mounting part for mounting the hinge when the bottom plate 1 is formed, so that the number of processing steps and parts can be reduced.

[0029]

As described above, according to the present invention, since the bottom plate is provided with the integrally formed bearing at a predetermined position, the bottom plate which has been conventionally attached to the bottom plate by the attachment component is provided. There is no need to attach the side bracket, and the number of components for mounting the bottom plate-side bracket and the bottom plate-side bracket and the number of processing steps can be greatly reduced. Further, a screw portion is formed at one end of the shaft, and a nut portion that can be screwed to the screw portion is formed on the bracket. It is possible to reduce the number and the steps of setting washers and nuts for tightening the nuts. Furthermore, since the bracket and the collar are arranged at predetermined positions of the mold, injection-molded, and the collar is mounted via the resin in the collar mounting hole of the bracket, a resin component for mounting the collar. It is no longer necessary to attach the hinges one by one by hand, and the number of parts and the number of processing steps for assembling the hinge can be reduced.

As described above, conventionally, three people were required to manufacture a seat having 240 hinges per day. However, according to the present invention, 1920 hinges per day per person. It has become possible to manufacture seats equipped with. Therefore,
Compared to the conventional method of manufacturing a seat with hinges, the present invention has achieved eight times the efficiency and has been able to reduce two persons per day.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a method of manufacturing a seat provided with a hinge according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a mount unit according to one embodiment of the present invention.

FIG. 3 is an explanatory view showing a hinge bracket according to one embodiment of the present invention.

FIG. 4 is an explanatory view showing a shaft hole and a nut of the bracket of FIG. 3;

FIG. 5 is an explanatory view showing a state where a rubber and a collar are attached to the bracket of FIG. 3;

FIG. 6 is an explanatory diagram showing a back surface of the bracket of FIG. 5;

FIG. 7 is an explanatory view showing a collar attached to the bracket shown in FIGS. 5 and 6;

FIG. 8 is an explanatory view showing a bottom plate of a seat provided with a conventional hinge, and a hinge mounting part mounted on the bottom plate.

FIG. 9 is an explanatory view showing a hinge of a seat provided with a conventional hinge.

FIG. 10 is an explanatory view showing a step of attaching a hinge to a bottom plate in a conventional method of manufacturing a seat having a hinge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 31 Bottom plate 2, 32 Hinge 3 Bracket 4, 34 Shaft 5 Mounting part 6 Bearing part 7 Insertion hole 8 Bend part 9 Shaft hole 10 Nut part 11 Collar mounting hole 12, 13 Rubber hole 14 Collar 15, 16, 17 Rubber 18 Ring-shaped part 19 Cylindrical part 20 Bolt head 21 Screw part 22, 25 Concave part 23 Center convex part 24 End side convex part 40 Nut 51 Bottom plate side bracket 52 Vehicle side bracket 53 Mounting part 54 Screw part 55 Color mounting hole 56 Rubber mounting hole

Claims (4)

[Claims] 1. A seat provided with a hinge capable of opening and closing a seat with respect to a vehicle body side, a bearing unit integrally formed at a predetermined position of a bottom plate constituting the seat, a shaft, and the shaft. A bracket formed with a shaft hole through which the bracket passes, and a mount portion formed integrally with the bottom plate in a shape adjacent to the bearing portion and capable of supporting the bracket. A seat provided with a hinge, wherein the hinge is formed by passing the shaft through a bearing portion. 2. A screw part is formed at one end of the shaft, and a nut part that can be screwed to the screw part is formed on the bracket. Seat with hinges. 3. A step of arranging a bracket having a collar mounting hole and a collar at a predetermined position of a mold, performing injection molding, and mounting the collar to the collar mounting hole of the bracket via a resin. At the time of installation, a bottom plate including a bearing portion and a mount portion adjacent to the bearing portion is injection-molded at a predetermined position facing the vehicle body side, and at a position on a side surface of the bottom plate on an extension of the bearing portion, Forming an insertion hole, passing a shaft having a threaded portion at an end through the insertion hole through the bearing portion of the bottom plate and the shaft hole of the bracket, and the threaded portion of the shaft and a nut And a nut tightening step of screwing the seat with a hinge. 4. The bracket has a shaft hole in advance.
The method according to claim 3, wherein a nut portion that can be screwed with the screw portion is formed, and the screw portion is screwed to the nut portion in the nut tightening step.