JP6028617B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat in which a frame is configured by joining rod-shaped frame members including pipes.

  A vehicle seat in which a frame is formed by joining four pipes in a frame shape is disclosed in Patent Document 1 below. In this seat, the left and right side edges and the lower edge of the pipe constituting the frame are crushed in the diametrical direction to form brackets for connecting the pipes together. The pipes on the upper side and the lower side are connected by a wire. The pipes are bolted at the bracket portion, but the pipe and the wire are welded.

JP2013-14241A

As described above, a pipe in which both ends are crushed to form a bracket portion is managed so that foreign matter does not enter the pipe when both ends are crushed, but after both ends are crushed, Foreign objects may enter. For example, when welding a wire to a pipe as described above, welding spatter may be scattered inside the pipe. If such a foreign substance enters the pipe, the foreign substance may move in the pipe and generate noise when the seat is mounted on the vehicle.
In view of such problems, the problem of the present invention is that when a foreign object enters the pipe constituting the seat frame, the foreign object is fixed in the pipe so that the seat is mounted on a vehicle such as a vehicle. This is to suppress the generation of abnormal noise.

A first aspect of the present invention is a vehicle seat in which a frame is configured by joining rod-like frame members including pipes, and the pipe is crushed in the diametrical direction to form a flat surface. The pipe is provided with a fixing means for fixing the foreign matter that has entered the pipe at a predetermined position in the pipe.
According to the first invention, even if a foreign matter enters the pipe for some reason, the foreign matter is fixed at a predetermined position in the pipe by the fixing means, so that when the seat is mounted on the vehicle, the foreign matter is It is possible to suppress the generation of abnormal noises by moving within.

According to a second aspect of the present invention, in the first aspect, the fixing means is an adhesive injected into the pipe, and the pipe is provided with an injection hole for injecting the adhesive into the pipe. It is characterized by.
According to the second invention, due to the adhesiveness of the adhesive injected from the injection hole, the foreign matter that has entered the pipe is captured and fixed during the movement, and the generation of abnormal noise can be suppressed.

According to a third aspect of the present invention, in the second aspect, the pipe is provided with bracket portions at both ends thereof, and the injection holes are respectively opened corresponding to the bracket portions at both ends. And
According to the third invention, since the injection holes are respectively opened corresponding to the bracket portions at the both ends of the pipe, the injection holes are arranged apart from each other at positions close to the both ends of the pipe. The influence on the strength of the pipe due to the formation of the injection hole can be reduced.

According to a fourth aspect of the present invention, in the second or third aspect of the invention, the injection hole is formed by cutting and raising the pipe wall surface to the inside of the pipe.
When the injection hole is formed by punching the pipe wall surface, the punched scrap remains in the pipe. However, according to the fourth invention, the injection hole is formed by cutting and forming, so that no scrap is generated and the scrap is removed. Therefore, it is possible to omit an extra process.

According to a fifth aspect of the present invention, in the fourth aspect of the invention, the injection hole has a cut and raised piece formed by a cut and raised process coupled to the bracket portion side.
According to the fifth aspect of the invention, the injection of the pressure-sensitive adhesive is cut and raised from the end side of the pipe along the piece, and the injection work can be facilitated.

According to a sixth aspect of the present invention, in any one of the second to fifth aspects, the injection hole is formed by processing from a direction perpendicular to a plane including a flat surface of the bracket portion.
According to the sixth aspect of the present invention, the injection hole can be formed simultaneously with the processing for forming the bracket portion on the pipe. As a result, the number of pipe processing steps can be reduced.

According to a seventh aspect of the present invention, in the sixth aspect, the bracket portion is provided with a through hole such as a bolt fixing hole for fixing a pipe, a through hole for preventing rotation, and the like. It is formed by processing from a direction perpendicular to the flat surface.
According to the seventh aspect of the present invention, the injection hole can be formed simultaneously with the process of drilling the through hole in the bracket portion. As a result, the number of pipe processing steps can be reduced.

It is a front view of the seat frame which is one embodiment of the present invention. It is a side view of the pipe of the side in the above-mentioned embodiment. It is a front view of the pipe of the side in the above-mentioned embodiment. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is a front view of the pipe of the lower side in the above-mentioned embodiment. It is a side view of the pipe of the lower side in the above-mentioned embodiment. It is the VIII-VIII sectional view taken on the line of FIG.

1-8 illustrate one embodiment of the present invention. This embodiment shows an example in which the present invention is applied to a seat back of a vehicle rear seat integrated in the vehicle width direction.
The seat frame is formed by joining the ends of four pipes (corresponding to the rod-shaped frame material of the present invention) 1 to 3 and combining them into a frame shape. A reinforcing brace 6 is welded in a symmetrical manner between the pipes 1 and 3 sandwiching the joint. Also, six wires 5 are stretched between the pipes 1 and 2 on the upper and lower sides, and one wire 4 is stretched between the pipes 3 on the left and right sides for reinforcement. .
The upper pipe 1 and the side pipes 3 are joined by welding, and the lower pipe 2 and the side pipes 3 are joined by bolts.
Two pairs of headrest fixing portions 7 are welded to the pipe 1 on the upper side, divided into left and right sides. Each headrest fixing portion 7 supports a headrest (not shown) one by one on the left and right.

2 to 5 show the side pipe 3 on an enlarged scale. A common pipe 3 is used on the left and right sides.
At both ends of the pipe 3, the pipe is crushed in the diametrical direction to form flat surfaces, thereby forming bracket portions 31 and 32. The flat surfaces of the bracket portions 31 and 32 are formed so that their surface directions are shifted from each other by 90 degrees.
The bracket portion 31 coupled to the pipe 1 on the upper side is formed such that the position of the flat surface in the diametrical direction of the pipe is offset from the axial center of the pipe, and the front end side of the flat surface is returned to the axial center side of the pipe. Is bent. A weld nut 33 is welded to the bracket portion 31 on the inner side of the bend. When the side pipe 3 is welded to the upper pipe 1, the weld nut 33 enters the pipe from the end of the upper pipe 1.
A square hole 36 is formed on the flat surface of the bracket portion 31 on the side of the weld nut 33. When the square hole 36 is fastened to the weld nut 33 on the flat surface of the bracket portion 31 and a component (not shown) is attached, a projection (not shown) from the component side is fitted into the square hole 36, It functions as a detent.
On the other hand, the bracket portion 32 coupled to the lower pipe 2 has a flat surface in the diametrical direction of the pipe formed along the axis of the pipe. A round hole 37 for fastening a bolt is formed at the center of the flat surface of the bracket portion 32. In addition, a notch 38 is formed at the end of the bracket portion 32 to be used as a detent for a member (not shown) attached to the bracket portion 32.

Grease 8 serving as an adhesive (corresponding to the fixing means in the present invention) is provided in the pipe 3 at a portion where the cross-sectional shape of the pipe 3 changes from a circle to a straight line on the opposite ends of the bracket portions 31 and 32. Injection holes 34 and 35 for injection are respectively opened. Whereas the above-described square hole 36 and round hole 37 are punched holes by punching, the injection holes 34 and 35 are formed by cutting and raising the pipe wall surface inside the pipe. The cut and raised pieces 34A and 35A formed by the cutting and raising process are coupled to the bracket portion side.
The cutting and raising process for opening the injection holes 34 and 35 is performed by pressing from a direction perpendicular to the plane including the flat surfaces of the bracket portions 31 and 32. Therefore, the injection holes 34 and 35 can be formed simultaneously when the pipe 3 is crushed in the diameter direction in order to form the bracket portions 31 and 32. Further, the cutting and raising process for opening the injection holes 34 and 35 is performed by pressing from the same direction as the punching process for the square hole 36 or the round hole 37. Therefore, the injection holes 34 and 35 can be formed simultaneously when the square hole 36 or the round hole 37 is punched. Thus, the cutting and raising process for opening the injection holes 34 and 35 can be performed in the same process as the process of forming the bracket parts 31 and 32 and the process of punching the square holes 36 and the round holes 37. It is possible to reduce the processing steps of the pipe 3.
The injection holes 34 and 35 are opened corresponding to the bracket portions 31 and 32 at both ends of the pipe 3, respectively. For this reason, the injection holes 34 and 35 are arranged at positions close to both ends of the pipe 3 so as to be separated from each other, thereby reducing the influence on the strength of the pipe 3 by forming the injection holes 34 and 35 in the pipe 3. be able to.

6-8 has expanded and shown the pipe 2 of the said lower side.
The pipe 2 on the lower side is formed symmetrically, and both end portions thereof are curved into a gentle crank shape, and the pipe is crushed in the diametrical direction on the curved tip side to form a flat surface, and the bracket portion 21 and 21. Round holes 23 for fastening bolts are formed in the center of the flat surface of each bracket portion 21.
Grease 8 as an adhesive (corresponding to the fixing means in the present invention) is injected into the pipe 2 in the middle of the cross-sectional shape of the pipe 2 changing from a circle to a straight line on the opposite end side of the bracket portions 21 and 21. The injection holes 22 and 22 for opening are respectively opened. The injection holes 22 and 22 are also formed by cutting and raising the pipe wall surface inside the pipe, similarly to the injection holes 34 and 35 of the pipe 3 on the side. The cut and raised pieces 22A and 22A formed by the cutting and raising process are coupled to the bracket portions 21 and 21 side.
The cutting and raising process for opening the injection holes 22 and 22 is performed by pressing from a direction perpendicular to the plane including the flat surface of the bracket portions 21 and 21. Therefore, the injection holes 22 and 22 can be formed simultaneously when the pipe 2 is crushed in the diametrical direction to form the bracket portions 21 and 21. Further, the cutting and raising process for opening the injection holes 22 and 22 is performed by pressing from the same direction as the punching process for the round holes 23 and 23. For this reason, the injection holes 22 and 22 can be formed simultaneously when the round holes 23 and 23 are punched. Thus, the cutting and raising process for opening the injection holes 22 and 22 can be performed in the same process as the process of forming the bracket portions 21 and 21 and the process of punching the round holes 23 and 23, The processing process of the pipe 2 can be reduced.
The injection holes 22 and 22 are opened corresponding to the bracket portions 21 and 21 at both ends of the pipe 2, respectively. Therefore, each injection hole 22 and 22 is arranged at a position close to both ends of the pipe 3 so as to be separated from each other, thereby reducing the influence on the strength of the pipe 2 by forming the injection holes 22 and 22 in the pipe 2. be able to.

Although not shown, the tip of the grease injector is cut and raised at the injection holes 34 and 35 of the pipe 3 on the side and the injection holes 22 and 22 of the pipe 2 on the lower side and the pieces 34A, 35A, 22A and 22A are cut. The grease 8 is injected into the pipes 3 and 2. The injected grease 8 adheres to the inner walls of the pipes 3 and 2 close to the injection position due to its adhesiveness.
The grease 8 is injected from the end side of the pipes 3 and 2 along the cut and raised pieces 34A, 35A, 22A and 22A, so that the injection work is easy.

When the wire 4 is welded to the pipe 3 on the side and the wire 5 is welded to the pipe 2 on the lower side, spatter accompanying the welding is generated in the pipes of the pipes 3 and 2, and this spatter is generated in the pipe. It may enter as a foreign object. Since spatter is a fragment of the metal pipes 3 and 2, when the pipes 3 and 2 are assembled as seat frame components and mounted on a vehicle as a seat, the inner walls of the pipes 3 and 2 are sputtered by the vibration of the vehicle. Noise. However, according to the above-described embodiment, the foreign matter including spatter is captured by the adhesive grease 8 while moving in the pipes 3 and 2 with the vibration of the vehicle, and together with the grease 8 in the pipe. Since it is fixed, it cannot move freely in the pipes 3 and 2. Therefore, when the seat is mounted on the vehicle, it is possible to prevent foreign matter from moving in the pipes 3 and 2 and generating abnormal noise.
According to the above-described embodiment, the injection holes 34 and 35 of the side pipe 3 and the injection holes 22 and 22 of the lower pipe 2 are formed by cutting and raising, so that the scrap as in the case of punching is performed. Therefore, an extra process for removing scrap can be omitted. That is, when scrap is generated, a process only for opening the injection holes 34, 35, 22, 22 is required before the process of crushing the pipes 3, 2 for removing the scrap. In the embodiment, as described above, the injection holes 34, 35, 22, 22 are formed in the step of forming the bracket portions 31, 32, 21, 22, or It can process simultaneously in the same process as the process of drilling the holes 37, 23, 23. Therefore, one process step can be omitted.

As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example,
1. The fixing means may be one in which any one of an adhesive tape, a net, a complex intertwined fiber body, and a magnet is fixed to the inner wall of the pipe.
2. In the above embodiment, two injection holes are provided in each pipe, but one injection hole may be provided for each pipe.
3. In the above embodiment, the seat frame is constituted by four pipes, but a part of the pipe may be a rod-like rod or a plate material.
4). The seat frame is not limited to a rear seat back, but may be a seat cushion, or may be a front seat cushion or a seat back.
5). Although the case where the present invention is applied to a vehicle seat has been described in the above embodiment, the present invention may be applied to a seat of another vehicle such as an aircraft, a ship, or a train.

1 Upper pipe (bar-shaped frame material)
2 Lower pipe (bar-shaped frame material)
21 Bracket portion 22 Injection hole 22A Cut and raised piece 23 Round hole (through hole)
24 Welded part 3 Side pipe (bar frame material)
31, 32 Bracket portion 33 Weld nuts 34, 35 Injection holes 34A, 35A Cut and raised pieces 36 Square holes (through holes)
37 round holes (through holes)
38 Notches 4, 5 Wire 6 Reinforcement brace 7 Headrest fixing part 8 Grease (fixing means, adhesive)

Claims (3)

A vehicle seat in which a frame is configured by joining rod-shaped frame materials including pipes,
The joint portion of the pipe is a bracket portion in which the pipe is crushed in the diameter direction to form a flat surface,
The pipe includes a fixing means for fixing the foreign matter that has entered the pipe at a predetermined position in the pipe,
The fixing means is an adhesive injected into the pipe,
The vehicle seat, wherein the pipe is provided with an injection hole for injecting an adhesive into the pipe. In claim 1 ,
The pipe is provided with bracket portions at both ends thereof,
The vehicle seat according to claim 1, wherein the injection holes are respectively opened corresponding to the bracket portions at both ends. In claim 1 or 2 ,
The vehicle seat according to claim 1, wherein the injection hole is formed by cutting and raising the pipe wall surface to the inside of the pipe.

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