JP3735680B2 - Rear seat back frame structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a frame structure for a rear seat back, and more particularly, to a frame structure for a rear seat back that is easy to process, has a simple configuration, is lightweight, and has high strength.
[0002]
[Prior art]
The rear seat back is arranged on the side of the wheel house, and in the case of a retractable type that can be prone, the standing state is maintained by engaging with a lock anchor on the vehicle body side.
[0003]
FIG. 7 shows a conventional rear seat back 100 in which an upper pipe 120 and a lower pipe 130 are attached in parallel to an upper part and a lower part of a plate-like frame main body 110. The upper pipe 120 and the lower pipe 130 are connected by an outer pipe 140, an inner pipe 150, and a center pipe 160 as connection pipes. These pipes 140, 150, and 160 extend in the vertical direction, and upper and lower ends thereof are welded to the upper pipe 120 and the lower pipe 130.
[0004]
The outer pipe 140 is located on the vehicle body side, and a lock bracket 170 for raising the rear seat back 100 is fixed by welding. In FIG. 7, reference numeral 50 denotes a wheel house having a foil storage portion 51 for storing the foil, and a lock anchor 52 extending in the direction of the rear seat back 100 is attached to the outer surface of the wheel house. The lock anchor 52 is configured to hold the rear seat back 100 in an upright state by engaging with a lock mechanism (not shown) attached to the lock bracket 170.
[0005]
In the rear seat back 100 as described above, since the wheel storage portion 51 protrudes from the vehicle body side to the vehicle compartment side, the width of the mounting portion of the lower pipe 130 is narrow and the width of the mounting portion of the upper pipe 120 is wide. . In contrast to such a structure, when a straight pipe is used as the outer pipe 140, the distance between the lock bracket 170 and the lock anchor 52 is increased. Therefore, the lock bracket 170 needs to have a shape protruding greatly toward the wheel house 50. is there.
[0006]
[Problems to be solved by the invention]
However, when the protrusion amount of the lock bracket 170 is increased in this way, it is disadvantageous in strength. For this reason, it is necessary to supplement the strength of the lock bracket 170, and the lock bracket 170 is drawn or formed by assembling a number of parts. However, in the drawing process, there is a problem that the drawing is too deep and cannot be processed, or the process is troublesome and the cost is increased. In addition, when assembling a large number of parts, the number of parts is large, and not only is the assembly difficult, but there is a problem that the weight is increased.
[0007]
The present invention has been made in consideration of such conventional problems, and provides a frame structure for a rear seat back that is high in strength, easy to process, and can be reduced in weight with a simple structure. Objective.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is directed to a plate-shaped frame main body, an upper pipe and a lower pipe joined to the upper and lower portions of the frame main body, and at least two connecting the upper pipe and the lower pipe. In order to lock the above-mentioned connection pipe and the standing state of the rear seat back, the lock bracket attached to the connection pipe located on the vehicle body side of the connection pipe, and the outer periphery of the connection pipe located on the vehicle body side, A reinforcing support member for reinforcing the connection pipe, wherein the lock bracket is formed in a box shape partially having an opening, and the reinforcing support member is locked in a state in which the opening of the lock bracket is sealed. The lock bracket attachment piece joined to the bracket is integrally formed.
[0009]
In this invention, the reinforcing support member reinforces the connecting pipe located on the vehicle body side. Since the lock bracket mounting piece of the reinforcing support member is joined so as to seal the open portion of the lock bracket, it has a shell structure and is given high strength. Further, since it is configured only by joining two members, the number of parts is small, processing is easy, and the weight of the entire rear seat back can be reduced.
[0010]
Invention of Claim 2 is invention of Claim 1, Comprising: The said lock bracket has a mounting surface part which faces a vehicle body side, a pair of side wing surface part bent in the same direction from the left and right ends of the mounting surface part, A lower flange surface portion bent in the same direction as the side wing surface portion from the lower end of the mounting surface portion, and an upper flange surface portion bent in the same direction as the side wing surface portion from the upper end of the mounting surface portion. The lock bracket mounting piece seals the open portion in a state of being joined to the pair of side wing surface portions and the upper flange surface portion.
[0011]
Since the lock bracket of the present invention can be formed by simply bending the pair of side wing surface portions, the lower flange surface portion, and the upper flange surface portion in the same direction from the mounting surface portion, the lock bracket can be easily manufactured. Moreover, since the lock bracket mounting piece of the reinforcing support member only needs to have a shape that seals the open portion of the lock bracket, it can be similarly easily manufactured.
[0012]
The invention of claim 3 is the invention of claim 1 or 2, wherein the lock bracket and the reinforcing support member are formed by pressing a plate material.
[0013]
In this invention, since the lock bracket and the reinforcing support member are formed by pressing the plate material, the processing becomes easy.
[0014]
A fourth aspect of the present invention is the first aspect of the present invention, wherein the connecting pipe is formed of a high-tensile material.
[0015]
In the present invention, since the connecting pipe is formed of a high-tensile material, a straight structure can be obtained, and the rear seat back can be made simple and lightweight.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a frame structure of a rear seat back 1 according to an embodiment of the present invention. As shown in FIG. 7, the rear seat back 1 is disposed on the side of the wheel house 50 so as to be raised and lowered. The rear seat back 1 includes a plate-shaped frame body 2, an upper pipe 3 and a lower pipe 4, and connecting pipes 5, 6, and 7. A groove portion 2 a into which a lock anchor 52 protruding from the wheel house 50 enters is formed on the side surface of the frame body 2 on the vehicle body side.
[0017]
The upper pipe 3 and the lower pipe 4 are welded and joined to the upper and lower parts of the frame body 2. These pipes 3 and 4 are joined to the frame body 2 so as to be parallel. A guide belt ring 3a is provided at a substantially central portion of the upper pipe 3, and a child seat anchor wire 4a made of a metal wire is provided at a substantially central portion of the lower pipe 4 opposed to the belt ring 3a. It has been. In this embodiment, the upper pipe 3 and the lower pipe 4 are round pipes.
[0018]
The connecting pipes 5, 6 and 7 connect the upper pipe 3 and the lower pipe 4 from the outer pipe 5 located on the vehicle body side, the inner pipe 6 located on the vehicle compartment side, and the center pipe 7 arranged therebetween. It is configured. These pipes 5, 6, and 7 connect the upper pipe 3 and the lower pipe 4 by joining the upper and lower ends to the upper pipe 3 and the lower pipe 4 by welding. In this embodiment, the outer pipe 5, the inner pipe 6 and the center pipe 7 are all straight square pipes.
[0019]
The above connecting pipes 5, 6, 7 and the upper pipe 3 and the lower pipe 4 are formed of a high-tensile material. And by making these pipes 3, 4, 5, 6, and 7 into a straight structure, the rear seat back 1 can be made strong and lightweight. In this case, only the connecting pipes 5, 6, and 7 may be high tension materials.
[0020]
A lock bracket 10 and a reinforcing support member 20 are attached to the outer pipe 5 located on the vehicle body side.
[0021]
As shown in FIG. 2, the lock bracket 10 includes a mounting surface portion 11, a pair of side wing surface portions 12 and 13 bent in the same direction from the left and right ends of the mounting surface portion 11, and a side wing surface portion 12 from the lower end of the mounting surface portion 11. 13 includes a lower flange surface portion 14 bent in the same direction as 13, and an upper flange surface portion 15 bent in the same direction as the side wing surface portions 12 and 13 and the lower flange surface portion 14 from the upper end of the mounting surface portion 11. Thereby, the lock bracket 10 is formed in a substantially box shape having the opening 16 on the front side in FIG.
[0022]
The mounting surface portion 11 of the lock bracket 10 faces the wheel house 50 (see FIG. 7) on the vehicle body side, and a lock mechanism (not shown) that the lock anchor 52 from the wheel house 50 is detachably engaged is mounted. It is what is done. For this reason, the mounting surface portion 11 is formed with a mounting hole 11a for mounting the lock mechanism.
[0023]
The pair of side wing surface portions 12 and 13 have inclined surfaces 12a and 13a and contact surfaces 12b and 13b provided continuously from the lower ends of the inclined surfaces 12a and 13a at their tips. The inclined surfaces 12a and 13a are joined to the reinforcing support member 20 as will be described later. On the other hand, the contact surfaces 12b, 13b contact the outer surface of the outer pipe 5, and are welded and joined to the outer pipe 5 in this contact state.
[0024]
The lower flange surface portion 14 is inserted between the pair of side wing surface portions 12 and 13, and the left and right end surfaces 14 a and 14 b are in contact with the lower portions of the side wing surface portions 12 and 13. And the lower flange surface part 14 is joined to the side wing surface parts 12 and 13 by welding in this contact state. Further, the front end surface 14 c of the lower flange surface portion 14 protrudes to the front side of the side wing surface portions 12 and 13, and the front end surface 14 c comes into contact with the outer surface of the outer pipe 5 and is welded.
[0025]
The upper flange surface portion 15 at the upper end of the mounting surface portion 11 is bent in an L shape and is joined to the reinforcing support member 20 as will be described later.
[0026]
As shown in FIG. 3, the reinforcing support member 20 is configured by connecting a vertical U-shaped reinforcing portion 21 fitted to the outside of the outer pipe 5 and a lock bracket mounting piece 22 to which the lock bracket 10 is joined. Has been. The reinforcing portion 21 is fitted to the outer pipe 5 as shown in FIG. And it welds to the outer pipe 5 in this fitting state. The reinforcing support member 20 is attached to the pipe 5 in a state where the outer pipe 5 is reinforced by this welding.
[0027]
The lock bracket mounting piece 22 is provided with a covering surface portion 23 that is inclined and extends laterally. Side surface portions 24 and 25 that are bent in the same direction with a small width are connected to the left and right end portions of the covering surface portion 23, and a small upper surface portion 26 is connected to the upper end portion of the covering surface portion 23.
[0028]
The side surface portion 24 contacts the inclined surface 12 a of the side wing surface portion 12 of the lock bracket 10, and the side surface portion 25 contacts the inclined surface 13 a of the side wing surface portion 13. These are joined by welding in this contact state. The upper surface portion 26 abuts on the upper flange surface portion 15 of the lock bracket 10 and is joined to the upper flange surface portion 15 by welding.
[0029]
FIG. 4 shows a state in which the lock bracket 10 and the lock bracket attachment piece 22 of the reinforcing support member 20 are assembled and the assembled state is attached to the outer pipe 5. When assembled, the cover surface portion 23 of the lock bracket mounting piece 22 seals the opening 16 of the lock bracket. In this sealed state, the above-described welding is performed, so that the lock bracket 10 and the lock bracket mounting piece 22 form a shell structure.
[0030]
With such a sealed shell structure, the strength can be improved. Therefore, even if the lock bracket 10 has a shape that protrudes greatly toward the wheel house 50, there is no disadvantage in strength. Further, since the structure is composed of the two members of the lock bracket 10 and the lock bracket mounting piece 22, the number of parts is reduced, the assembly is easy, and the weight can be reduced.
[0031]
In this embodiment, the lock bracket 10 and the reinforcing support member 20 are formed by pressing a single plate material. FIG. 5 shows the original plate 30 in the expanded state of the lock bracket 10, and FIG. 6 shows the original plate 40 in the expanded state of the reinforcing support member 20. In these drawings, the above-described parts are denoted by reference numerals. In this way, when the plate material is pressed to form the lock bracket 10 and the reinforcing support member 20, the processing is easy and can be performed quickly.
[0032]
The present invention is not limited to the above embodiment, and various modifications can be made. For example, the upper pipe 3, the lower pipe 4, and the connecting pipes 5, 6, and 7 may be formed of a material other than the high-tensile material. Moreover, if the lock bracket 10 has the opening part 16 partially and is the box structure where the opening part 16 is sealed off by the lock bracket attachment piece 22, it can be set as the external shape other than illustration.
[0033]
【The invention's effect】
According to the first aspect of the present invention, the strength is high, the number of parts is small, processing is easy, and the weight of the entire rear seat back can be reduced.
[0034]
According to the invention of claim 2, the lock bracket and the reinforcing support member can be easily manufactured.
[0035]
According to the invention of claim 3, processing becomes easy.
[0036]
According to invention of Claim 4, a connection pipe can be made into a straight structure, and it can be reduced in weight by a simple shape.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of an embodiment of the present invention.
FIG. 2 is a perspective view of a lock bracket.
FIG. 3 is a perspective view of a reinforcing support member.
FIG. 4 is a front view of a state in which a lock bracket and a reinforcing support member are assembled.
FIG. 5 is a front view of the lock bracket in a developed state.
FIG. 6 is a front view of the reinforcing support member in a developed state.
FIG. 7 is a front view showing a frame structure of a conventional rear seat back.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rear seat back 2 Frame main body 3 Upper pipe 4 Lower pipe 5 Outer pipe 10 Lock bracket 11 Mounting surface part 12, 13 Side wing surface part 14 Lower flange surface part 15 Upper flange surface part 16 Opening part 20 Reinforcement support member 22 Lock bracket attachment piece

Claims (4)

A plate-shaped frame body;
An upper pipe and a lower pipe joined to the upper and lower parts of the frame body;
At least two or more connecting pipes connecting the upper pipe and the lower pipe;
In order to lock the standing state of the rear seat back, a lock bracket attached to a connection pipe located on the vehicle body side of the connection pipe,
A reinforcement support member attached to the outer periphery of the connection pipe located on the vehicle body side and reinforcing the connection pipe;
The lock bracket is formed in a box shape partially having an opening,
The frame structure of a rear seat back, wherein the reinforcing support member is integrally formed with a lock bracket mounting piece that is joined to the lock bracket in a state in which the opening of the lock bracket is sealed. The lock bracket includes a mounting surface portion facing the vehicle body side, a pair of side wing surface portions bent in the same direction from left and right ends of the mounting surface portion, and a side wing surface portion bent from the lower end of the mounting surface portion in the same direction. The lower flange surface portion joined to the lower end of the wing surface portion, and the upper flange surface portion bent in the same direction as the side wing surface portion from the upper end of the mounting surface portion is formed in a box shape,
2. The frame structure for a rear seat back according to claim 1, wherein the lock bracket mounting piece seals the opening portion in a state of being joined to the pair of side wing surface portions and the upper flange surface portion. The frame structure of the rear seat back according to claim 1, wherein the lock bracket and the reinforcing support member are formed by pressing a plate material. The frame structure of the rear seat back according to claim 1, wherein the connecting pipe is formed of a high-tensile material.

Images