JPH08166088A - Pseudo-pipe and reinforcement making use of it - Google Patents

Abstract

PURPOSE: To provide a pseudo-pipe which is sufficiently rigid, suitable for the mass production and excellent in the carriage and storage efficiency of the raw material and a reinforcement making use thereof. CONSTITUTION: A reinforcement 1 is pressed out of a steel plate or the like to be worked to be cylindrical in shape, and a large diameter part 2, a tapered part 3 and a small diameter part 4 are integrated with each other. The large diameter part 2, the tapered part 3 and the small diameter part 4 have one joining part 9, and projected in the radial direction at this joining part 9, and formed in a shape provided with a pair of bent parts 6, 7 which are abutted on each other. The bent part provided on each edge part of the plate to be worked are abutted on each other in the large diameter part 2 at the joining part 9.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a pseudo pipe and a reinforcement using the pseudo pipe.

[0002]

2. Description of the Related Art Conventionally, on the back side of an instrument panel in a vehicle, left and right front pillars are horizontally provided with reinforcements. As such a reinforcement, for example, as shown in FIG. 10 (a), one end of a large-diameter pipe 72 is necked to form a slightly small-diameter connecting portion 73, and a hole is formed in this connecting portion 73 by drilling. Reinforcement 7 manufactured by welding the small diameter pipe 74 through the
1 is known.

A steering support 62 is provided on a large-diameter pipe 72 arranged on the driver's seat side, and a steering column 65 for supporting the steering is attached to the steering support 62. Large diameter pipe 72
The large cross section allows the steering to be supported and the steering rigidity is secured.

A small-diameter pipe 7 arranged on the passenger side
Internal components such as a heater control 66, a radio 67, and an air bag 68 are supported by 4. Since these interior parts are relatively lightweight and do not require rigidity, they are supported by the small diameter pipe 74 in consideration of weight reduction of the vehicle body.

[0005]

However, since the large-diameter pipe 72 and the small-diameter pipe 74 are both ready-made hollow pipes, most of the space occupied by the pipes is air, which is poor in transportation efficiency and is difficult to store. There was a problem that it required a large space.

On the other hand, since the reinforcement 71 is joined by welding, there is a problem that it is difficult to improve productivity and economic efficiency because many steps and manufacturing equipment such as welding work and drilling work are required. . In order to deal with such a problem, Japanese Patent Laid-Open No. 5-293535 discloses a configuration shown in FIG.
As shown in FIG. 3, there is disclosed a reinforcement 81 made of a hollow material in which portions having different cross-sectional areas are continuous and the boundary portion of these portions is tapered. According to this, a single pipe is used as a processing raw material, and a large diameter portion, a small diameter portion, and a taper portion intermediate between the large diameter portion and the small diameter portion are formed by subjecting this pipe to drawing processing and swaging processing.

However, in the reinforcement 81 disclosed in Japanese Unexamined Patent Publication No. 5-293535, it was necessary to transport or store the pipe as a processing raw material at the site where the drawing process or the swaging process was performed. At this time, again, since the pipe is hollow, most of the space occupied by the pipe is air, and transport efficiency is poor,
There is a problem that a large space is required for storage.

In the drawing process, the drawing speed is limited to a predetermined speed (for example, 1 m / min),
This process is the rate-limiting factor in manufacturing, and mass productivity cannot be sufficiently achieved. The present invention has been made in view of the above problems, and an object of the present invention is to provide a pseudo pipe having excellent transport and storage efficiency of a processing raw material, and a reinforcement using the pseudo pipe.

[0009]

In order to solve the above problems, a pseudo pipe according to a first aspect of the present invention is characterized in that a single plate-like body is rolled by plastic working and formed into a pipe shape. The pseudo pipe according to claim 2 is the pseudo pipe according to claim 1, wherein the cross-sectional shape has one joint portion, and both edge portions of the plate-shaped body are in contact with each other at the joint portion. And

A pseudo pipe according to a third aspect is the pseudo pipe according to the second aspect, wherein bent portions are provided at both edges of the plate-like body, and the both bent portions are inside or outside the pseudo pipe. And are in contact with each other. A reinforcement of claim 4 is characterized by comprising the pseudo pipe according to any one of claims 1 to 3.

According to another aspect of the present invention, there is provided a reinforcement having a large diameter portion for supporting steering on a driver side, a small diameter portion for supporting interior parts on a passenger side, and the large diameter portion or the small diameter portion. And a taper portion connecting the large diameter portion and the small diameter portion, wherein at least one of the large diameter portion and the small diameter portion is a pseudo pipe according to any one of claims 1 to 3. It is characterized by being formed.

A reinforcement of claim 6 is the pseudo pipe according to any one of claims 1 to 3, wherein the pseudo pipe includes a large-diameter portion for supporting a steering on a driver side and a passenger seat. And a taper portion connecting the large diameter portion and the small diameter portion to each other.

According to a seventh aspect of the present invention, there is provided the reinforcement according to any of the fourth to fifth aspects, wherein a bracket portion for attaching to a vehicle body is provided at an end portion of the reinforcement portion. It is characterized in that it is formed during plastic working of one plate-shaped body.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The pseudo pipe according to the first aspect of the present invention is formed into a pipe shape by winding a single plate-like body by plastic working. For example, the pseudo pipe may have a cylindrical shape with a constant overall diameter, a tapered shape with a gradually changing diameter, or a plurality of portions having different diameters (for example, a large diameter). (Diameter portion, small diameter portion). This pseudo pipe has the effects of improving the transportation efficiency of the plate-like body which is the processing raw material and effectively utilizing the space for storage. That is, in the case of an ordinary pipe, the hollow portion of the pipe is air, so that the transportation efficiency is poor and the space is wasted during storage. However, according to the present invention, the plate-like members are loaded without any gap. Therefore, it is possible to solve the problem.

Here, as described in claim 2, the pseudo pipe has a joint portion having a cross-sectional shape of one and both edge portions of the plate-like body are in contact with each other at the joint portion. It may be molded, and in this case, the effect of increasing the rigidity and reinforcing it in terms of strength can be obtained. As a form in which both edge portions of the plate-shaped body are in contact with each other, in addition to a case where both edge portions are butted and contact with each other, as described in claim 3, the both edge portions of the plate-shaped body are respectively bent. And a case in which the bent portions are inside or outside the pseudo pipe and are brought into contact with each other.
In the latter case, it is possible to obtain the effect that the rigidity is further increased and the strength is reinforced.

[0016] A reinforcement of claim 4 comprises the above-mentioned pseudo pipe. This reinforcement is
The whole may be formed by the pseudo pipe, or may be partially formed by the pseudo pipe. In the latter case, the portion other than the pseudo pipe may be formed by a normal pipe. Since this reinforcement uses a pseudo pipe, the same effects as those obtained by the pseudo pipe can be obtained.

In the reinforcement of the fifth aspect, at least one of the large diameter portion and the small diameter portion is formed by the above pseudo pipe. Here, the large diameter portion may be a pseudo pipe and the small diameter portion may be a normal pipe, the large diameter portion may be a normal pipe and the small diameter portion may be a pseudo pipe, and both may be pseudo pipes. Good. Also, the taper part is a large diameter part,
Although it may be provided on any of the small diameter portions, it is preferable that the tapered portion is provided on the side formed by the pseudo pipe in consideration of workability. Since this reinforcement uses a pseudo pipe, the same effects as those obtained by the pseudo pipe can be obtained.

The reinforcement of claim 6 is formed by a single pseudo pipe having a large diameter portion, a small diameter portion and a taper portion. Since the large-diameter portion, the small-diameter portion, and the tapered portion are formed by plastically working one plate-shaped body, a normal pipe is not required. Therefore, it is possible to more effectively use the space as compared with a reinforcement that uses a normal pipe. In addition, since it does not require processes and manufacturing equipment such as welding work and drilling work for welding, it has excellent productivity and economic efficiency, and is not restricted by the drawing speed compared to the case of drawing work. Therefore, the number of products manufactured per hour increases, and mass productivity is excellent. still,
Since this reinforcement uses a pseudo pipe, the same effects as those obtained by the pseudo pipe can be obtained.

In the above-mentioned reinforcement, as described in claim 7, a bracket portion may be provided at an end portion of the reinforcement during plastic working. In this case,
Since the bracket as a separate component is unnecessary, the component cost is reduced accordingly. Moreover, since it is formed integrally with the bracket portion, there is an effect that the bracket is superior in strength as compared with the case where the bracket is a separate component.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are explanatory views of the reinforcement of the first embodiment. FIG. 1A is a front view, FIG. 1B is a left side view, and FIG. 1C is a sectional view taken along line AA.

In the reinforcement 1 of the first embodiment, a single processing plate material 11 made of steel or the like (see FIG. 2) is pressed into a cylindrical shape, and has a large diameter portion 2, a tapered portion 3 and a small diameter portion. The part 4 is integrally formed. The cross sections of the large-diameter portion 2, the tapered portion 3, and the small-diameter portion 4 have the same configuration except that the diameters are different. Therefore, the cross-section of the large-diameter portion 2 will be described as an example.

The cross section of the large-diameter portion 2 has one joint 9 as shown in FIG. 1C, and a pair of bent portions 6 projecting radially inward at the joint 9 and abutting each other, 7 is formed in a shape. That is, the bent portions 6 and 7 provided at both edges of the processing plate material 11 (see FIG. 2) at the joint portion 9 are in contact with each other inside the large diameter portion 2.

Next, a method for manufacturing the reinforcement will be described. 2 is an explanatory view showing a plate material for processing, FIG. 3 is a process drawing, (a) is a sectional view of the first step, (b) is a sectional view of the second step, and (c) is a sectional view of the third step. It is a figure.

As shown in FIG. 2, the processing plate material 11 has a large-diameter portion forming portion 12 which becomes the large-diameter portion 2 later, and a taper portion 3 later.
And a small diameter portion forming portion 14 that will be the small diameter portion 4 later. This processing plate material 11
Is cut out from a sheet-shaped steel material, for example.

A process for manufacturing the reinforcement 1 using the processing plate material 11 as a processing raw material will be described. [First Step] In the first step, the large diameter portion forming portion 12, the tapered portion forming portion 13, and the small diameter portion forming portion 14 are formed as shown in FIG.
, A first lower mold 41a having an arcuate groove 41c having a large radius of curvature, and a groove 41c of the first lower mold 41a.
Is pressed by the first upper mold 41b having a shape substantially corresponding to. As a result, the plate material 11 for processing has the first lower die 41 on both edges.
It is pressed in a form protruding above a, and the protruding portions become bent portion forming portions 16 and 17. [Second Step] In the second step, the large diameter portion forming portion 12, the taper portion forming portion 13, and the small diameter portion forming portion 14 are formed as shown in FIG.
As shown in FIG. 2, the second lower mold 42a having an arc-shaped groove 42c having a smaller radius of curvature than the groove 41c of the first lower mold 41a.
And a second upper mold 42 having a tip substantially matching the center of the groove 42c of the second lower mold 42a and having a width narrower than the groove 42c.
Pressed with b. As a result, the processing plate material 11
Is the groove 4 of the second lower mold 42a.
The shape protrudes upward from 2c. [Third Step] In the third step, the large diameter portion forming portion 12, the tapered portion forming portion 13, and the small diameter portion forming portion 14 are formed as shown in FIG.
As shown in FIG. 3, the third lower mold 43a having a groove 43c having a semicircular cross section and the third upper mold 43b having a groove 43d having a semicircular cross section are pressed together. As a result, the processing plate material 11 has a tubular shape, and the cross section thereof has a shape in which the bent portion forming portions 16 and 17 at both edges are bent inward in the radial direction and are in contact with each other. The bent portion forming portions 16 and 1 that are in contact with each other
7 are separated and form a junction 19.

Through the above steps, the reinforcement 1 of the first embodiment can be obtained. The third
The large diameter portion forming portion 12 after the process corresponds to the large diameter portion 2, the taper portion forming portion 13 corresponds to the taper portion 3, and the small diameter portion forming portion 14 corresponds to the small diameter portion 4. In addition, the bent portion forming portions 16 and 17
Corresponds to the bent portions 6 and 7.

An example of using the reinforcement 1 of the first embodiment will be described with reference to FIG. FIG. 4 is a diagram for explaining the use of the first embodiment. Reinforcement 1 of this embodiment
Is horizontally fixed by being fixed to the left and right front pillars P on the back side of the instrument panel of the automobile. That is, the end portion of the large diameter portion 2 is inserted into the central hole 63a of the flange 63 provided on the front pillar P, and the end portion of the small diameter portion 4 is fixed to the front pillar P by the bracket 64 with bolts.

In the reinforcement 1, the large diameter portion 2 is arranged on the driver seat side and the small diameter portion 4 is arranged on the passenger seat side. A steering support 62 is provided below the large diameter portion 2, and four downward bolts are arranged on the steering support 62.
The steering column 65 is attached via these bolts. That is, since the steering is supported by the large-diameter portion 2 of the reinforcement 1, the steering rigidity is secured by the large cross section.

On the other hand, the heater control 66 and the radio 6
7. Interior parts such as the passenger side airbag 69 are supported by the small diameter portion 4. Since these interior parts are relatively lightweight and do not require rigidity, they are supported by the small diameter portion 4 in consideration of weight reduction of the vehicle body. According to the reinforcement 1 of the first embodiment described above, the following effects can be obtained. Since a single processing plate 11 is manufactured by pressing, the transportation efficiency of the processing plate 11 that is a processing raw material is high,
The space for storing the processing plate material 11 can be effectively used. That is, when the processing raw material is a pipe, since the hollow portion of the pipe is air, the transportation efficiency is poor and the space for storage is wasted, but the processing plate material 11 can be loaded without a gap. Therefore, this problem can be solved. Despite being manufactured by pressing one processing plate material 11, the cross-sectional shape is the structure shown in FIG.
By providing a structure in which the bent portions 6 and 7 are in contact with each other in the radial inward direction of the large-diameter portion 2 at the joint portion 9, a rigidity substantially equal to that of the pipe is ensured and a high steering rigidity is maintained. can do. Since the drawing process is not performed, there is no limitation due to the drawing speed, and therefore the number of products manufactured per unit time increases, and the mass productivity is excellent.

Next, the second embodiment will be described. FIG. 5 is an explanatory view of the reinforcement of the second embodiment,
(A) is a front view, (b) is a left side view, (c) is a BB sectional view. The reinforcement 21 of the second embodiment is
Similar to the first embodiment, one processing plate material 3 made of steel or the like
1 (see FIG. 6) is pressed into a tubular shape, and a large diameter portion 22, a taper portion 23, and a small diameter portion 24 are integrally formed.

The cross sections of the large-diameter portion 22, the taper portion 23, and the small-diameter portion 24 have the same structure except that the diameters are different.
The cross section of the large diameter portion 22 will be described as an example. As shown in FIG. 5C, the cross section of the large-diameter portion 22 includes one joint portion 29, and a pair of bent portions 26 and 27 that project radially outward at the joint portion 29 and contact each other. , Both bent portions 26, 2
It is bent into a curled shape in a state where 7 is in contact. That is, the bent portions 36 and 37 provided at both edges of the processing plate material 31 (see FIG. 6) at the joining portion 29 are formed in a curled shape outside the large diameter portion 22 and in contact with each other. There is.

Second, except for the structure of the above-mentioned joint 29,
Since the embodiment is similar to the first embodiment, its explanation is omitted. Next, a method of manufacturing the reinforcement 21 of the second embodiment will be described. FIG. 6 is an explanatory view showing a plate material for processing, FIG. 7 is a process drawing, (a) is a cross-sectional view of the first process,
(B) is sectional drawing in a 2nd process, (c) is sectional drawing in a 3rd process, (d) is sectional drawing in a 4th process.

As shown in FIG. 6, the processing plate member 31 has a large-diameter portion forming portion 32 which will be the large-diameter portion 22 later, a taper portion forming portion 33 which will be the tapered portion 23 later, and a small-diameter portion which will be the small-diameter portion 24 later. And a part forming portion 34. The plate material 31 for processing is produced by cutting out, for example, a sheet-shaped steel material.

A process of manufacturing the reinforcement 21 using the processing plate 31 as a processing raw material will be described. [First Step] In the first step, the large diameter portion forming portion 32, the taper portion forming portion 33, and the small diameter portion forming portion 34 are shown in FIG.
, A first lower die 51a having an arcuate groove 51c with a large radius of curvature, and a groove 51c of the first lower die 51a.
Is pressed by the first upper mold 51b having the protrusion 51d that substantially corresponds to and the flat portions 51e provided on both sides of the protrusion 51d. As a result, the plate material 31 for processing is the first lower mold 5
The portion protruding from 1a is pressed by the flat portion 51e to form the bent portion forming portions 36 and 37. [Second Step] In the second step, the large diameter portion forming portion 32, the tapered portion forming portion 33, and the small diameter portion forming portion 34 are formed as shown in FIG.
As shown in FIG. 2, the second lower mold 52a having an arc-shaped groove 52c having a smaller radius of curvature than the groove 51c of the first lower mold 51a.
And a second upper mold 52 having a tip substantially matching the center of the groove 52c of the second lower mold 52a and having a width narrower than the groove 52c.
Pressed with b. As a result, the processing plate material 31
Is the groove 5 of the second lower mold 52a.
The shape protrudes upward from 2c. [Third Step] In the third step, the large diameter portion forming portion 32, the taper portion forming portion 33, and the small diameter portion forming portion 34 are shown in FIG.
As shown in FIG. 3, the third lower mold 53a having a groove 53c having a semicircular cross section and the pair of left and right third upper molds 53b, 53b having grooves 53e, 53e having a quarter cross section are pressed. The pair of third upper molds 53b, 53b have square grooves 53d, 53d on the surfaces contacting each other.

As a result, the processing plate member 31 has a tubular shape, and its cross section has a shape in which the bent portion forming portions 36 and 37 at both edges are in contact with each other in the radial outer direction. The bent portion forming portions 36 and 37 that are in contact with each other are separated from each other to form a joint portion 39. [Fourth Step] In the fourth step, the curving portions 36 and 37, which are in contact with each other in the outer radial direction, are curled to be curled as shown in FIG. 7D.

Through the above steps, the reinforcement 21 of the second embodiment can be obtained. The large diameter portion forming portion 32 after the fourth step corresponds to the large diameter portion 22, the taper portion forming portion 33 corresponds to the taper portion 23, and the small diameter portion forming portion 34 corresponds to the small diameter portion 24. In addition, the bent portion forming portion 3
Reference numerals 6 and 37 correspond to the bent portions 26 and 27.

The reinforcement 21 of the second embodiment is
It can be used in the same manner as in the first embodiment, and the same effect as in the first embodiment can be obtained. It should be noted that, despite the fact that one sheet of processing plate 11 is manufactured by press working, it is possible to secure rigidity that is substantially the same as that of a pipe and to maintain high steering rigidity because the sectional shape is as shown in FIG. The structure shown in (c) (that is, the bent portion 2 at the joint 9).
This is because the curls 6 and 27 are located outside the large-diameter portion 22 and are in contact with each other.

In the fourth step of the second embodiment, the bent portions abutting each other may be bent at a substantially right angle as shown in FIG. Next, a third embodiment will be described. FIG. 11 is the third
It is explanatory drawing of the reinforcement of an Example, (a) is a front view, (b) is a left side view, (c) is CC sectional drawing.

Reinforcement 101 of the third embodiment
In the same manner as in the first embodiment, a single processing plate material 111 (see FIG. 12) made of steel or the like is pressed into a cylindrical shape, and the large diameter portion 102, the taper portion 103, and the small diameter portion 104 are integrally formed. It was formed. Large diameter portion 102, taper portion 10
3. The cross-sections of the small-diameter portion 104 have the same configuration except that the diameters are different. Therefore, the cross-section of the large-diameter portion 102 will be described as an example.

The cross section of the large-diameter portion 102 has one joint 109 as shown in FIG. 11C.
The shape is such that both edge portions 111a and 11b of the processing plate material 111 are butted against each other. In this state, the joint portion 109 is welded to form the welded portion 105.

The third embodiment is the same as the first embodiment except for the structure of the above-mentioned joining portion 109, and therefore its explanation is omitted. Next, the reinforcement 101 of the third embodiment.
The manufacturing method of will be described. 12 is an explanatory view showing a plate material for processing, FIG. 13 is a process drawing, (a) is a cross-sectional view of the first process, (b) is a cross-sectional view of the second process, and (c) is a cross-section of the third process. FIG. 6D is a sectional view in the fourth step.

As shown in FIG. 12, the processing plate material 111 is
It has a large-diameter portion forming portion 112 that will later become the large-diameter portion 102, a taper portion forming portion 113 that will later become the taper portion 103, and a small-diameter portion forming portion 114 that will later become the small-diameter portion 104. The processing plate material 111 is produced by cutting out, for example, a sheet-shaped steel material.

A process of manufacturing the reinforcement 101 by using the processing plate material 111 as a processing raw material will be described. [First Step] In the first step, the large diameter portion forming portion 112, the taper portion forming portion 113, and the small diameter portion forming portion 114 are formed as shown in FIG.
As shown in FIG. 3 (a), an arc-shaped groove 9 having a large radius of curvature is formed.
A first lower die 91a having a 1c and a first upper die 91 having a protrusion 91d that substantially matches the groove 91c of the first lower die 91a.
Pressed with b. As a result, the processing plate material 11
1 is formed so that the cross section has an arc shape. [Second Step] In the second step, the large diameter portion forming portion 112, the taper portion forming portion 113, and the small diameter portion forming portion 114 are formed as shown in FIG.
As shown in FIG. 3 (b), a second lower die 92a having an arcuate groove 92c having a smaller radius of curvature than the groove 91c of the first lower die 91a, and a central portion of the groove 92c of the second lower die 92a. It is pressed by the second upper mold 92b having a substantially matching tip and having a width narrower than the groove 92c. As a result, the processing plate material 111 is formed to have a substantially U-shaped cross section. [Third Step] In the third step, the large diameter portion forming portion 112, the taper portion forming portion 113, and the small diameter portion forming portion 114 are formed as shown in FIG.
As shown in FIG. 3C, the third lower die 93a having a groove 93c having a semicircular cross section and the third upper die 93b having a groove 93d having a semicircular cross section are pressed together. This allows
The processing plate material 111 has a tubular shape, and its cross section has both edges 11
The shape is such that 1a and 111b are butted against each other. [Fourth step] In the fourth step, the contacting edge portions 111 are
a and 111b are welded to form a welded portion 115.

Through the above steps, the reinforcement 101 of the third embodiment can be obtained. still,
The large diameter portion forming portion 112 after the fourth step is the large diameter portion 102
The tapered portion forming portion 113 corresponds to the tapered portion 103, and the small diameter portion forming portion 114 corresponds to the small diameter portion 104. Further, the joint portion 119 corresponds to the joint portion 109 and the welded portion 115 corresponds to the welded portion 105.

Reinforcement 101 of the third embodiment
Can be used in the same manner as in the first embodiment.
It is possible to obtain substantially the same effect as the embodiment. However, the bent portions 6 and 7 of the first embodiment or the bent portion 2 of the second embodiment.
Since the components corresponding to Nos. 6 and 27 are not provided, the first and second embodiments are superior in terms of rigidity.

Here, in the process of pressing the working plate members 11, 31, 111 of the first to third embodiments,
As shown in FIG. 9, the bracket portion 8 may be formed at the end of the small diameter portions 4, 24, 104. This bracket part 8
Is a portion where the processing plate members 11 and 31 are left as plate-like bodies, and is provided with a bolt insertion hole 8a through which a bolt for attaching to the front pillar P (see FIG. 4) of the vehicle body can be inserted.

The bracket portion 8 has the processing plate members 11, 31, 111 before performing the first step of the first to third embodiments.
Of the small-diameter portion forming portions 14, 34, 114 are preliminarily formed with the bolt insertion holes 8a by pressing, and the end portions of the small-diameter portion forming portions 14, 34, 114 are formed into a plate shape in each subsequent step. It is formed by holding it as it is.

As a result, since the bracket 64 as shown in FIG. 4 is not required as a separate component, the component cost is reduced. Further, since it is integrated with the reinforcements 1, 21, 111, it is superior in strength as compared with the case of separate parts.
Next, a fourth embodiment will be described. 14A and 14B are explanatory views of the reinforcement of the fourth embodiment. FIG. 14A is a front view, FIG. 14B is a left side view, and FIG. 14C is a sectional view taken along line DD.

Reinforcement 121 of the fourth embodiment.
Is composed of an insertion portion 125, a tapered portion 123, a large diameter portion 122, and a small diameter portion 124. The insertion portion 125, the taper portion 123, and the large-diameter portion 122 are formed by pressing a single plate material made of steel or the like into a tubular shape. That is, the insertion portion 125, the tapered portion 123, and the large diameter portion 1
22 is integrally molded.

The cross sections of the insertion portion 125, the taper portion 123, and the large diameter portion 122 have the same structure except that the diameters are different. Therefore, the cross section of the large diameter portion 122 will be described as an example. As shown in FIG. 14C, the cross section of the large-diameter portion 122 has one joint portion 129, and a pair of bent portions 126 and 127 that are provided in the joint portion 129 so as to project radially inward and abut each other. It is formed in a curved shape. In addition, this insertion portion 125,
The method of integrally forming the taper portion 123 and the large diameter portion 122 conforms to the first to third steps of the first embodiment.

The small diameter portion 124 is composed of one pipe, and its inner diameter is designed to be slightly larger than the outer diameter of the insertion portion 125. The insertion portion 125 is inserted into one end of the small diameter portion 124, and the end portion of the small diameter portion 124 and the insertion portion 12 are inserted.
The outer surface of 5 is joined by welding.

Reinforcement 1 of the fourth embodiment described above
21 can be used similarly to the first embodiment. Further, according to the reinforcement 121 of the fourth embodiment, the following effects can be obtained. In order to integrally form the insertion portion 125, the taper portion 123, and the large diameter portion 122 by pressing one processing plate material,
The processing plate material, which is the processing raw material, has high transport efficiency, and the space for storing the processing plate material can be effectively used. Although the insertion portion 125, the taper portion 123, and the large diameter portion 122 are integrally formed by pressing a single processing plate material, the cross-sectional shape thereof is shown in FIG.
It is said that the bending portions 126 and 127 are in contact with each other in the radial direction at the joint portion 129), so that the same rigidity as that of the pipe can be secured and the steering rigidity can be maintained high. The effect is obtained. When changing the rigidity of the reinforcement according to the vehicle type, the rigidity of the large diameter portion often becomes a problem, but according to the present embodiment, the insertion portion 125, the taper portion 123, and the large diameter portion 122 are By changing the thickness of the processing plate material used for integral molding, it is possible to easily increase the rigidity on the large diameter portion side.

Next, a fifth embodiment will be described. FIG.
FIG. 13 is an explanatory view of a reinforcement of the fifth embodiment,
(A) is a front view, (b) is a left side view, and (c) is an EE sectional view. Reinforcement 141 of the fifth embodiment
Is composed of an insertion portion 145, a tapered portion 143, a large diameter portion 142, and a small diameter portion 144.

The insertion portion 145, the taper portion 143, and the large diameter portion 142 are formed by pressing a single plate material for processing, such as steel, into a cylindrical shape, as in the fourth embodiment.
The cross sections of the insertion portion 145, the tapered portion 143, and the large diameter portion 142 have the same configuration except that the diameters are different. Therefore, the cross section of the large diameter portion 142 will be described as an example.

The cross section of the large-diameter portion 142 has one joint 149 as shown in FIG. 15 (c).
In this case, a pair of bent portions 146, 147 protruding outward in the radial direction are provided and abutted against each other, and the bent portions 146, 147 are formed into a curled shape that is bent in a contact state.
The insertion portion 145, the taper portion 143, and the large diameter portion 14
The method of integrally molding 2 and 1 is the first to fourth of the second embodiment.
According to the process.

The small diameter portion 144 is composed of one pipe, and its outer diameter is designed to be slightly smaller than the inner diameter of the insertion portion 145. One end of the small-diameter portion 144 has the insertion portion 1
45, and the outer surface of the small diameter portion 144 and the insertion portion 145.
Is joined by welding to the end.

Reinforcement 141 of the fifth embodiment
Can be used in the same manner as in the first embodiment. Further, the same effect as that of the fourth embodiment can be obtained. Next, a sixth embodiment will be described. FIG. 16 is an explanatory view of a reinforcement of the sixth embodiment, (a) is a front view,
(B) is a left side view and (c) is a FF sectional view.

Reinforcement 161 of the sixth embodiment
Is composed of an insertion portion 165, a taper portion 163, a large diameter portion 162, and a small diameter portion 164. The insertion portion 165, the taper portion 163, and the large diameter portion 162 are formed by pressing a single plate material made of steel or the like into a tubular shape, as in the fourth embodiment.

The cross sections of the insertion portion 165, the taper portion 163, and the large diameter portion 162 have the same structure except that the diameters are different. Therefore, the cross section of the large diameter portion 162 will be described as an example. The cross section of the large-diameter portion 162 has a shape in which one joint 169 is provided as shown in FIG. 16C, and both edges of the processing plate material are abutted at the joint 169, In this state, the joint 169 is welded to form a welded portion 165. The method of integrally molding the insertion portion 165, the tapered portion 163, and the large diameter portion 162 is based on the first to fourth steps of the third embodiment.

The small diameter portion 164 is composed of one pipe, and its outer diameter is designed to be slightly smaller than the inner diameter of the insertion portion 165. One end of the small diameter portion 164 has an insertion portion 1
65, and the outer surface of the small diameter portion 164 and the insertion portion 165.
Is joined by welding to the end.

Reinforcement 161 of the sixth embodiment
Can be used in the same manner as in the first embodiment. Further, it is possible to obtain substantially the same effect as that of the fourth embodiment.
However, the bent portions 126, 127 or the fifth portion of the fourth embodiment
Since the bent portions 146 and 147 corresponding to the embodiments are not provided, the fourth and fifth embodiments are superior in terms of rigidity.

Next, a seventh embodiment (a modification of the fourth embodiment) will be described. 17A and 17B are explanatory views of the reinforcement of the seventh embodiment. FIG. 17A is a front view and FIG. 17B is an assembled perspective view. Reinforcement 18 of the seventh embodiment
1 is the insertion portion 185, the taper portion 183, the large diameter portion 182,
It is composed of a small diameter portion 184.

The insertion portion 185, the tapered portion 183, and the large diameter portion 182 are formed by pressing a single plate material for processing made of steel or the like into a cylindrical shape. That is, the insertion portion 18
5, the taper portion 183 and the large diameter portion 182 are integrally molded. The joint portion of the insertion portion 185 is welded in a state where both edges are abutted so as to abut (for example, see FIG. 16C). On the other hand, the joining portion of the taper portion 183 and the large diameter portion 182 is formed in a shape including a pair of bent portions 186 and 187 that are provided so as to project radially inward and contact each other (see, for example, FIG. 14C). . The method of integrally molding the insertion portion 185, the tapered portion 183, and the large diameter portion 182 is the same as the first embodiment except that no bent portion is provided at a portion corresponding to the insertion portion 185. It can be performed according to the first to third steps.

The small diameter portion 184 is composed of one pipe, and its outer diameter is designed to be slightly smaller than the inner diameter of the insertion portion 185. One end of this small-diameter portion 184 is the insertion portion 1
85, and the outer surface of the small diameter portion 184 and the insertion portion 185.
Is joined by welding to the end.

Reinforcement 1 of the seventh embodiment described above
According to 81, in addition to the same operational effects as in the fourth embodiment, the following effects can be obtained. That is, when manufacturing a reinforcement having the same shape as that of the fourth embodiment, since the small diameter portion 184 is inserted into the insertion portion 185 in the seventh embodiment, the diameters of the insertion portion 185 and the large diameter portion 182 are different. The difference is small,
The taper portion 183 has a gradual inclination, so that it is easier to press than the fourth embodiment.

Next, a modification of the seventh embodiment will be briefly described with reference to FIG. In this modification, the insertion portion 18
The line of the joining portion of 5 ', the taper portion 183', and the large diameter portion 182 'is formed in a shape having a step instead of a straight line. Such a shape is adopted when required by the shape of the space around the instrument panel, and can be incorporated as a part of the processing step when performing press working.

Next, an eighth embodiment (a modification of the fifth embodiment) will be described. 19A and 19B are explanatory views of the reinforcement of the eighth embodiment. FIG. 19A is a front view and FIG. 19B is an assembled perspective view. Reinforcement 19 of the eighth embodiment
1 is the insertion portion 195, the taper portion 193, the large diameter portion 192,
It is composed of a small diameter portion 194. The reinforcement 191 has a pair of bent portions 196 and 197 that are provided at a joint portion of the tapered portion 193 and the large diameter portion 192 and project outward in the radial direction and abut each other. The seventh embodiment is the same as the seventh embodiment except that it is bent to form a curl. The operational effects are also the same as in the seventh embodiment.

Needless to say, the present invention is not limited to the above-mentioned embodiments and can be carried out in various modes without departing from the technical scope of the present invention. For example, in the reinforcements of the first to third embodiments, the small-diameter portion, the taper portion, and the large-diameter portion are formed such that the line of the joining portion is a straight line, but as shown in FIG. Taper part,
You may form so that the axis line of the central axis of a large diameter part may become a straight line.

The reinforcement 1 of the first embodiment may have a zigzag bent shape.
Specifically, the shape of FIG. 1A viewed from above may be the shape shown in FIG. 20 (plan view of FIG. 1A). In this case, the line at the joint 9 is also bent in a zigzag manner.

In the reinforcements of the above fourth to sixth embodiments, the small diameter portion is made of a pipe, and the insertion portion, the taper portion and the large diameter portion are integrally formed by one processing plate material. However, conversely, the large diameter part may be a pipe, and the insertion part (which is connected to the large diameter part in this case), the taper part and the small diameter part may be integrally formed by one processing plate material. .

Further, although the small diameter portion, the taper portion and the large diameter portion are provided in the reinforcement of each of the above-mentioned embodiments, these portions may be eliminated to make the diameter constant (FIG. 21).
(A)), the diameter may be gradually changed to form a taper (FIG. 21 (b)). 21 (a) and 21 (b)
Are both front views. At this time, the joining portion may be a straight line when viewed from above, but may be bent in a zigzag manner as shown in FIG. 21C (a plan view is shown in FIG. 21C).

[Brief description of drawings]

FIG. 1 is an explanatory view of a reinforcement of a first embodiment, (a) is a front view, (b) is a left side view, and (c) is A.
It is -A sectional drawing.

FIG. 2 is an explanatory view showing a plate material for processing of the first embodiment.

FIG. 3 is a process drawing of the first embodiment, (a) is a sectional view of the first process, (b) is a sectional view of the second process, and (c).
[FIG. 8] is a sectional view in a third step.

FIG. 4 is a diagram illustrating the use of the reinforcement of the first embodiment.

5A and 5B are explanatory views of a reinforcement of the second embodiment, where FIG. 5A is a front view, FIG. 5B is a left side view, and FIG.
It is a -B sectional view.

FIG. 6 is an explanatory diagram illustrating a processing plate material according to a second embodiment.

FIG. 7 is a process drawing of the second embodiment, (a) is a cross-sectional view of the first process, (b) is a cross-sectional view of the second process, and (c).
Is a sectional view in the third step, and (d) is a sectional view in the fourth step.

FIG. 8 is a sectional view of a modification of the second embodiment.

FIG. 9 is an explanatory view of a main part when the bracket part is integrally molded.

FIG. 10 is an explanatory diagram of a conventional example.

FIG. 11 is an explanatory view of the reinforcement of the third embodiment, (a) is a front view, (b) is a left side view, and (c) is a C-C sectional view.

FIG. 12 is an explanatory diagram illustrating a processing plate material according to a third embodiment.

FIG. 13 is a process drawing of the third embodiment, in which (a) shows the first
Sectional view of the step, (b) is a sectional view of the second step,
(C) is sectional drawing in a 3rd process, (d) is sectional drawing in a 4th process.

14A and 14B are explanatory views of a reinforcement of the fourth embodiment, where FIG. 14A is a front view, FIG. 14B is a left side view, and FIG. 14C is a sectional view taken along line DD.

FIG. 15 is an explanatory view of a reinforcement of the fifth embodiment, (a) is a front view, (b) is a left side view, and (c) is a sectional view taken along line EE.

FIG. 16 is an explanatory view of a reinforcement of the sixth embodiment, (a) is a front view, (b) is a left side view, and (c) is a FF sectional view.

FIG. 17 is an explanatory view of a reinforcement of a seventh embodiment, (a) is a front view and (b) is an assembled perspective view.

FIG. 18 is an explanatory diagram of a modified example of the seventh embodiment.

FIG. 19 is an explanatory view of a reinforcement of the eighth embodiment, (a) is a front view and (b) is an assembled perspective view.

FIG. 20 is a plan view of a modified example of the first embodiment.

FIG. 21 is an explanatory diagram of another modification.

[Explanation of symbols]

1 ... Reinforcement, 2 ... Large diameter part, 3 ... Tapered part, 4.
..Small-diameter parts, 6, 7, ... Bent parts,
9 ... Joined portion, 11 ... Plate material for processing,
12 ... Large diameter portion forming portion, 13 ... Tapered portion forming portion, 16 ... Small diameter portion forming portion, 16, 17 ... Bending portion forming portion,

Claims (7)

[Claims] 1. A pseudo pipe which is formed by rolling a single plate-shaped body by plastic working to form a pipe. 2. The pseudo pipe according to claim 1, wherein the cross-sectional shape has one joint portion, and both edge portions of the plate-shaped body are in contact with each other at the joint portion. 3. A bent portion is provided on each of both edges of the plate-like body, and the bent portions are in contact with each other inside or outside the pseudo pipe. Pseudo pipe described. 4. A reinforcement comprising the pseudo pipe according to any one of claims 1 to 3. 5. A large-diameter portion for supporting steering on the driver's side, a small-diameter portion for supporting interior parts on the passenger's side, and a large-diameter portion provided on either the large-diameter portion or the small-diameter portion. A tapered portion connecting the diameter portion and the small diameter portion, wherein at least one of the large diameter portion and the small diameter portion is formed by the pseudo pipe according to any one of claims 1 to 3. Reinforcement. 6. The pseudo pipe according to any one of claims 1 to 3, wherein the pseudo pipe supports a steering wheel on a driver side and a large-diameter part on a passenger side to support interior parts. And a taper portion that connects the large diameter portion and the small diameter portion. 7. A bracket portion for attaching to a vehicle body is provided at an end portion, and the bracket portion is formed when the one plate-shaped body is plastically worked. Reinforcement according to any one of.