JP2002112850A - Constitution member of seat frame and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the constitution member of a seat frame which can simply be manufactured with the minimum number of parts, and a method for manufacturing the same. SOLUTION: As material for manufacturing a seat-part frame and a seatback frame being the constitution members of the seat frame 1, the seat frame is provided with an extruded aluminum material 15 having a pair of bar-like edge frame forming parts 16 arranged separately in parallel and a plate-like receiving plate forming part 17 positioned between both of the parts 16 and connecting both of the parts 16 integrally. A large number of slots S are formed in staggering pattern at the part 17 of this material 15. Stretching work for expanding both of the parts 16 in a separating direction is given at the part 17 to expand the part 17 in the state of a net to forming a receiving plate part 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member for a seat frame (seat frame,
Backrest frame) and a method of manufacturing the same.

[0002]

2. Description of the Related Art For example, a seat frame and a backrest frame of a front seat and a rear seat of an automobile are subjected not only to the weight of the occupant but also to repeated loads due to vibrations during traveling, and furthermore, the automobile is hit. In some cases, an impact load is applied. For this reason, these seat frames and backrest frames
It needs to be made robust.

FIG. 7 shows a conventional seat frame in a front seat of an automobile. The seat frame (50) has a pair of left and right edge frame portions (51a) (51a) and a pair of front and rear edge frame portions (51b) (51b).
And a receiving plate portion (52) formed inside the outer peripheral frame portion (51) to receive the buttocks of the seated person. The outer peripheral frame part (51) is formed by bending two round steel pipes in a U-shape, joining their ends to each other, and joining them by welding (W ′ is a welded part), thereby obtaining a flat view. It is formed in a letter shape. A plurality of steel wires (53) are bridged over the left and right edge frame portions (51a) (51a) of the outer peripheral frame portion (51) and joined by welding, so that the left and right edge frame portions (51) are joined.
a) A receiving plate portion (52) is formed between (51a).

[0004]

In the above-mentioned conventional seat frame (50), when manufacturing the seat frame (50), the steel wires (53) are attached to the left and right edge frame portions (51a) (51a). Since welding has to be performed one by one, the production efficiency is low, and the number of parts is large, so that the production cost is high.

In recent years, although not shown, a method of manufacturing a seat frame or a backrest frame by pressing a steel plate with a mold having a molding recess having a predetermined shape, or a method of manufacturing a seat frame or a backrest frame by die casting of magnesium or the like. Methods have been developed for manufacturing the leaning frame. However, even in these cases, the manufacturing cost of the mold is high, so that the manufacturing cost of the seat frame and the backrest frame cannot be reduced.

The present invention has been made in view of such a technical background, and an object thereof is to provide a constituent member of a seat frame which can be easily manufactured with a minimum number of parts and a method of manufacturing the same. Is to do.

[0007]

In order to achieve the above-mentioned object, a seat frame according to the present invention comprises a pair of edge frames arranged in parallel and spaced apart from each other, and formed between the two edge frames. And a receiving plate portion for receiving the buttocks or the back of the seated person, comprising a mesh portion and a pair of frame portions integrally formed on both side edges of the mesh portion in the expanding direction. It is formed of expanded metal, and the mesh portion and both frame portions are a receiving plate portion and both edge frame portions, respectively.

In the constituent members of the seat frame,
The constituent member is formed of an expanded metal having a mesh portion and a pair of frame portions integrally formed on both side edges of the mesh portion in the extending direction, and the mesh portion and the both frame portions are respectively provided with a receiving plate portion. And by having both edge frames, it is not necessary to separately manufacture both edge frames and receiving plate portions, and it is not necessary to join and fix the receiving plate portions to both edge frames by welding, As a result, the manufacturing efficiency is improved and the manufacturing cost is reduced.

A method of manufacturing a component of a seat frame according to the present invention (Claim 2) includes a pair of edge frames arranged in parallel and separated from each other, and a seated person formed between the two edge frames. A method of manufacturing a component member of a seat frame, comprising: a buttocks or a back plate for receiving a back, comprising: a pair of bar-shaped edge frame portion forming portions disposed in parallel and separated from each other; A large number of slots are formed in a staggered arrangement on the receiving plate part using an extruded profile that has a plate-shaped receiving plate part forming part that is located between After that, in the receiving plate portion forming portion, by performing stretch processing to expand the both edge frame portion forming portion in the separating direction, the receiving plate portion forming portion is expanded in a net shape to form the receiving plate portion. I have.

In this method of manufacturing a component of a seat frame, an extruded member having a predetermined portion is used as a material for manufacturing the component, so that the component can be manufactured efficiently and cost-effectively. You. Further, it is not necessary to separately manufacture the both-side frame portion and the receiving plate portion, and it is not necessary to join and fix the receiving plate portion to the both-side frame portion by welding. As a result, the manufacturing efficiency is improved and the manufacturing is improved. Costs are further reduced.

Further, according to the present invention (claim 3), there is provided a method for manufacturing a component member of a seat frame, wherein at least one of the seat frame and the backrest frame includes a pair of edge frame portions which are spaced apart in parallel. A method for manufacturing a component member of a seat frame comprising a receiving plate portion formed between the both edge frame portions and receiving a buttocks or a back of a seated person, comprising a pair of bar-shaped edge frames arranged in parallel and separated from each other. Extruding part forming part, and a plate-shaped receiving plate part forming part which is located between the two side frame part forming parts and is integrally connected to the two side frame part forming parts over the entire length thereof. A cut-out portion is formed at both ends in the length direction of the receiving plate portion forming portion by cutting the substantially entire width of the receiving plate portion forming portion over a predetermined length range, and the receiving plate portion is formed. A number of slots are formed in a staggered arrangement in the forming part, and then a receiving plate part is formed. After performing stretch processing to expand the both-side frame part forming part in the separating direction in the above, the receiving plate part forming part is expanded in a net shape to form the receiving plate part, and then both sides of the cut part of the two-sided frame part forming part Is bent toward the cutout side to form front, rear, left, right, up, down, left and right edge frame portions around the receiving plate portion.

In this case, the same operation as described above can be achieved. Furthermore, according to this manufacturing method, it is possible to manufacture a constituent member of a seat frame having front, rear, left, right, up, down, left and right edge frame portions formed around a receiving plate portion with one extruded shape member. As a result, the manufacturing efficiency is further improved, and the manufacturing cost is greatly reduced.

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, (1) is a seat frame. (10) is a seat frame as one component of the seat frame (1), and (20) is a backrest frame as another component of the seat frame (1).

The seat frame (1) is used for a front seat such as a driver's seat or a passenger seat in an automobile, and includes the seat frame (10) and a backrest frame (20). In this seat frame (1), the backrest frame (20) is connected to the rear end of the seat frame (10) via hinge members (2) and (2) whose angles can be adjusted so as to be capable of turning over.

The seat frame (10) is composed of a pair of left and right edge frames (11a) (11a) arranged in parallel and separated from each other and a pair of front and rear edge frames (11b) and (11b) arranged in parallel and separated from each other. And a seated person (not shown) formed inside the outer peripheral frame portion (11) having a rectangular shape in plan view and inside the outer peripheral frame portion (11) (that is, between the left and right edge frame portions (11a) and (11a)). And a receiving plate portion (12) having a rectangular shape in plan view for receiving the buttocks.

The seat frame (10) is formed of an expanded metal having a mesh portion and a pair of frame portions integrally formed on both side edges of the mesh portion in the expanding direction. That is, in the seat frame (10), the receiving plate (12) is formed of a net-like portion of expanded metal, and the left and right edge frames (11a) and (11a) are formed of both frames of expanded metal. It was done. Furthermore, the front and rear edge frame portions (11b) and (11b) of the seat frame (10)
Are formed by bending the ends of both frame portions of the expanded metal in an L-shape.

On the other hand, the backrest frame (20) is composed of a pair of left and right edge frame portions (21a) (21a) spaced apart in parallel and a pair of upper and lower edge frame portions (21b) (21b) ( 21b)
An outer peripheral frame portion (21) having a rectangular shape in plan view and an inner side of the outer peripheral frame portion (21) (that is, between the left and right edge frame portions (21a) and (21a)). And a receiving plate portion (22) having a rectangular shape as viewed from the front.

The backrest frame (20) is made of expanded metal with a frame, similarly to the seat frame (10) described above. That is, the receiving plate portion (22) of the backrest frame (20) is formed of a net-like portion of expanded metal, and the left and right edge frame portions (21a) (2
1a) is composed of both frames of expanded metal. Further, the upper and lower edge frames (21b) and (21b) of the backrest frame (20) are formed by bending both ends of the expanded metal in an L-shape.

The seat frame (10) and the backrest frame (2
0) Both length and width dimensions are 250-600m
It is desirable that the value be set within the range of m.

The seat frame (10) and the backrest frame (20) are manufactured by the same manufacturing method.
The manufacturing method of the seat frame (10) will be described below.

First, as a material for manufacturing the seat frame (10), a metal extruded profile (1) having a predetermined portion shown in FIG.
Prepare 5). In this embodiment, in order to reduce the weight, an extruded aluminum (including the alloy thereof, the same applies hereinafter) (15) is used as the extruded metal.

The aluminum used for producing the extruded profile (15) is not particularly limited, but A6061-T6 or A6063-T5 is preferably used. These are inexpensive and have good extrudability. Furthermore, A6061-T1 material and A6063-
It is desirable to use T1 material. This is because these have good workability. A6061-T1 material and A6063-
When the T1 material is used, it is preferable to perform aging after performing a slot forming process and a bending process described later, and thereby the working limit can be improved.

As shown in FIG. 2, the extruded profile member (15) comprises a pair of right and left straight bar-shaped edge frame portion forming portions (16) and (16), which are spaced apart in a parallel manner. Part formation part (16)
(16) Located between (16) and both edge frame part forming part (16)
(16) is provided with a plate-shaped receiving plate portion forming portion (17) integrally connected over the entire length thereof.

Each of the edge frame forming portions (16) has a hollow portion (H) penetrating in the longitudinal direction as shown in FIG. Is formed.

The receiving plate portion forming portion (17) includes a plurality of thick rib portions (17a) extending in the length direction and formed in parallel with each other, and a rib portion extending in the length direction and adjacent to the rib portion. (17a) and a thin-walled web portion (17b) in which (17a) are integrally connected to each other.

In this extruded profile (15), the length of one side (length in the vertical direction,
It is desirable that each of them is set within a range of 10 to 100 mm, and the thickness is set within a range of 1 to 7 mm. By setting like this,
The lightweight and high-strength edge frame portions (11a) (11a) can be formed.

Next, at both ends in the length direction of the receiving plate portion forming portion (17) of the extruded shape member (15), the entire width of the receiving plate portion forming portion (17) is reduced over a predetermined length range. It was cut off by press cutting, and as a result, as shown in FIG. 3, only both edge frame portions (16) and (16) were left at both ends in the length direction of the receiving plate portion forming portion (17). The cut portions (18) and (18) are formed. In FIG. 2A, (J) is a receiving plate portion forming portion (1).
The part to be resected in 7) is shown.

Then, after or during this cutting step, the web portions (17b) of the receiving plate portion forming portion (17) of the extruded profile (15 ') are added to FIG. As shown in FIG. 4) and FIG. 4, a large number of slots (S), such as long cuts or slits, are formed in a zigzag pattern over the entire surface by press punching. The extruded profile (15 ') thus obtained is a material for manufacturing the above-described expanded metal.

Next, with respect to the extruded profile (15 '), in the receiving plate portion forming portion (17) in which the slot (S) is formed, both edge frame portion forming portions (16) and (16) are separated from each other. As shown in FIG. 5, the receiving plate portion forming portion (17) is expanded into a net shape having a large number of tortoise-shaped meshes by performing a stretching process to expand the receiving plate portion (17). Form 12).

Next, the portions (16a) and (16a) located on both sides of the cutout portion (18) of the both edge frame portion forming portions (16) and (16) of the extruded profile (15 ') are expanded. The bent portion (18) is bent by press bending along the longitudinal edges of the plate forming portion (17), and the ends are joined by welding in a butt shape (welded portion W). I do. Thereby, as shown in FIG. 6, the outer peripheral frame portion (11) including the front, rear, left and right edge frame portions (11a) (11a) (11b) (11b) around the receiving plate portion (12).
Is formed.

In bending the portions (16a) and (16a) of the edge frame forming portions (16) and (16), the edge frame forming portion (16) has a hollow portion (H). Therefore, such bending can be easily performed.

Next, both ends in the longitudinal direction of the web portion (17a) are joined and fixed to the front and rear edge frame portions (11b) (11b) by welding. At this time, as shown in FIG. 6, both ends in the longitudinal direction of the web portion (17a) are connected to the front and rear edge frame portions (11b) and (11b) located on the side of the seated person (that is, the front and rear edge frame portions). (11b)
(11b) (upper wall surface), and in this state, it is desirable to bond and fix it by welding. By doing so, the load applied when the seated person is seated (eg, the weight of the seated person)
Can also be supported by the front and rear edge frame portions (11b) and (11b), so that the seated person can be firmly received. In the present invention, it is not always necessary to join the longitudinal end portions of the web portion (17a) and the front and rear edge frame portions (11b) and (11b) by welding or the like.
a) Both ends in the length direction may be simply placed on the upper wall surfaces of the front and rear edge frame portions (11b) and (11b).

Through the above steps, a desired seat frame (10) is manufactured.

If necessary, the seat plate (12) of the seat frame (10) thus obtained and the front, rear, left and right edge frame portions (11a) (11a) are provided in order to improve the sitting comfort of the seated person. (11
b) (11b) may be curved or bent by press working or the like.

On the other hand, when manufacturing the backrest frame (20), the front and rear edge frames (11b) and (11b) in the above-described method of manufacturing the seat frame (10) are replaced with the upper and lower edge frames (21b) ( Two
The desired backrest frame (20) can be obtained by manufacturing by reading as in 1b).

Next, by connecting the obtained backrest frame (20) to the rear end of the seat frame (10) via hinge members (2) and (2) whose angle can be adjusted, the backrest frame (20) can be turned upside down.
The seat frame (1) shown in FIG. 1 is manufactured. In addition,
In the seat frame (1) of this embodiment, the seat frame (10) and the backrest frame (20) are arranged with the welded portion (W) positioned in front and rear or up and down as shown in FIG. However, in the present invention, it is a matter of course that the welded portions (W) may be disposed so as to be located on the left and right.

In the seat frame (1) of the above embodiment, the seat frame (10) and the backrest frame (20)
Since both are made of aluminum, they are lightweight. In addition, front and rear left and right edge frame portions (11b), (11b), (11a) and (11a) of the seat frame (10) and upper and lower left and right edge frame portions (21b) (21b) and (21) of the backrest frame (20)
a) Since (21a) has the hollow portion (H), it is extremely lightweight. More specifically, a seat frame (10) was manufactured using an extruded aluminum member (15) having a length of 840 mm according to the manufacturing method of the above embodiment. Weight is 2.5k
g. In this extruded aluminum material (15), the cross-sectional dimension of each edge frame portion forming portion (16) is 40 mm long × 20 mm wide × 2.0 mm thick, and the average thickness of the receiving plate portion forming portion (17) Is 5 mm. On the other hand, when the conventional seat frame (50) shown in FIG. 7 was manufactured using a round steel pipe and a steel wire, the weight of the obtained seat frame (50) was 2.9.
kg. The cross-sectional dimension of the round steel pipe used was φ21.7m
mx 3.2 mm thickness. As can be seen from the results, according to this embodiment, a seat frame (10) that is lighter than the conventional seat frame (50) can be obtained.

Furthermore, the seat frame (10) of this embodiment
And the back plate (20), the receiving plate (12)
Since (22) is formed integrally with the left and right edge frame portions (11a), (11a), (21a), and (21a), they are firmly connected. Therefore, if the receiving plate portions (12) and (22) are temporarily Even when a load is repeatedly applied due to vibrations during traveling, the receiving plate portions (12) and (22) are left and right edge frame portions (11a) (11a) (21a).
There is no risk of breaking from (21a).

Furthermore, since the seat frame (10) and the backrest frame (20) are both manufactured from one extruded profile (15), the number of parts and welding points are extremely small, and therefore the manufacturing cost is reduced. Is attached cheaply.

The embodiment of the present invention has been described above.
The present invention is not limited to the above embodiment, and it is needless to say that various settings can be changed.

[0042]

As described above, the constituent member of the seat frame according to the present invention is formed from an expanded metal having a mesh portion and a pair of frame portions integrally formed on both side edges of the mesh portion in the expanding direction. While the net and both frames are
According to the present invention, since the receiving plate portion and the both edge frame portions are respectively provided, it is not necessary to separately manufacture the both edge frame portions and the receiving plate portion when manufacturing the constituent member,
Further, since it is not necessary to join and fix the receiving plate portion to the both edge frame portions by welding, manufacturing efficiency is improved, and thus manufacturing cost can be reduced.

According to the method for manufacturing a component of a seat frame according to the present invention, an extruded member having a predetermined portion is used as a material for manufacturing the structural member. The member can be manufactured efficiently and cost-effectively. Furthermore, it is not necessary to separately manufacture the both-side frame portion and the receiving plate portion, and it is not necessary to join and fix the receiving plate portion to the both-side frame portion by welding. Manufacturing costs can be further reduced.

In the case where the front and rear, left and right or up and down and left and right edge frame portions are formed around the receiving plate portion by bending the portions on both sides of the cut portion of the both edge frame portion forming portions toward the cut portion. Since it is possible to manufacture the constituent members of the seat frame in which the front, rear, left, right, up, down, left and right edge frame portions are formed around the receiving plate portion with the extruded shape members, the manufacturing efficiency is further improved, thereby reducing the manufacturing cost. Can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a seat frame and a backrest frame as constituent members of a seat frame according to an embodiment of the present invention.

FIGS. 2A and 2B are diagrams showing an extruded profile used for manufacturing a seat frame of the seat frame, wherein FIG. 2A is a plan view and FIG. 2B is a cross-sectional view taken along line II-II in FIG.

FIGS. 3A and 3B are diagrams showing an extruded material in which a slot and a cutout portion are formed in a receiving plate portion forming portion, wherein FIG. 3A is a plan view and FIG. 3B is a cross-sectional view taken along line III-III in FIG. .

FIG. 4 is an enlarged plan view of a portion A in FIG.

FIG. 5 is a plan view showing a state in which a receiving plate portion forming portion of the extruded profile is expanded in a net shape by stretching.

FIG. 6 is a plan view showing a state in which front, rear, left and right edge frame portions are formed around a receiving plate portion by bending predetermined portions of both edge frame portion forming portions of the extruded profile.

FIG. 7 is a plan view of a seat frame of a conventional seat frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Seat frame 10 ... Seat frame (composition member of a seat frame) 11 ... Peripheral frame part 11a ... Left and right edge frame parts 11b ... Front and rear edge frame parts 12 ... Receiving plate part 15 ... Extruded shape material 16 ... Edge frame part 17 ... Receiving plate portion forming portion 18... Cutout portion S... Slot 20... Backrest frame (a constituent member of the seat frame) 21... Outer peripheral frame portion 21 a.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiko Minami 6224, Kaiyama-cho, Sakai City Showa Aluminum Co., Ltd. F-term (reference) 3B087 DB04 DE01 DE02

Claims (3)

[Claims] 1. A pair of edge frames (11a, 11a) (21a, 21a) spaced apart in parallel and a receiving plate portion formed between the two edge frames to receive the buttocks or back of a seated person. (12) (22)
(10) (2)
0), which is formed from an expanded metal having a mesh portion and a pair of frame portions integrally formed on both side edges of the mesh portion in the expanding direction, wherein the mesh portion and both frame portions are respectively Receiving plate part (12) (22) and both edge frame parts (11a, 11a) (21a, 21
a) A component member of a seat frame characterized by the following. 2. A pair of edge frames (11a, 11a) (21a, 21a) spaced apart in parallel and a receiving plate portion formed between the two edge frames to receive the buttocks or back of a seated person. (12) (22)
(10) (2)
0), wherein a pair of bar-shaped edge frame portion forming portions (1
An extruded member (15) having a plate-shaped receiving plate portion forming portion (17) which is located between the both edge frame portion forming portions and is integrally connected to the both edge frame portion forming portions. After forming a large number of slots (S) in a staggered arrangement in the receiving plate portion forming portion (17), the both edge frame portion forming portions (16, 1) are formed in the receiving plate portion forming portion (17).
The seat frame is characterized in that the receiving plate portion forming portion (17) is expanded in a net shape to form the receiving plate portions (12) and (22) by performing a stretch process for expanding 6) in a separating direction. A method for manufacturing a component. 3. A pair of edge frames (11a, 11a) (21a, 21a) spaced apart in parallel and a receiving plate portion formed between the two edge frames to receive the buttocks or back of a seated person. (12) (22)
(10) (2)
0), wherein a pair of bar-shaped edge frame portion forming portions (1
6, 16) and a plate-shaped receiving plate portion forming portion (17) which is located between the both edge frame portion forming portions and integrally connects the both edge frame portion forming portions over the entire length thereof. By using an extruded shape member (15) having the following configuration, substantially the entire width of the receiving plate portion forming portion is cut off at both ends in the length direction of the receiving plate portion forming portion (17) over a predetermined length range. Forming the resection part (18) and receiving plate part forming part (17)
By forming a large number of slots (S) in a zigzag pattern in the zigzag pattern, and then performing stretch processing on the receiving plate portion forming portion (17) to expand both edge frame portion forming portions (16, 16) in the separating direction. After the receiving plate portion forming portion (17) is expanded in a net shape to form the receiving plate portions (12, 22), the portions (16a, 1
6a) is bent toward the resection side to make the receiving plate (12)
(22) around the front and back, left and right or up and down and left and right edge frame (11a, 1
1a, 11b, 11b) (21a, 21a, 21b, 21b).