JP6426221B2 - Vehicle pedal and method of manufacturing the same - Google Patents

Description

  The present invention relates to a vehicle pedal used for a brake pedal or a clutch pedal of a car and a method of manufacturing the same.

  A pedal for a vehicle used for a brake pedal or a clutch pedal of a car has a stepping portion operated by a driver's foot and the stepping portion provided on the distal end side and rotatably supported on the base end side with respect to the vehicle body And a pedal arm provided with the supported portion. In such a vehicle pedal, the pedal arm is formed using a thick metal plate having a thickness of about 6 to 10 mm in order to ensure the strength against the pedal load when the driver performs a stepping operation. However, while the pedal arm using such a thick metal plate is easy to obtain a predetermined strength, it has a problem of increased weight.

  On the other hand, a pedal for a vehicle is disclosed in Patent Document 1 below in which a predetermined strength is secured by making the pedal arm a hollow structure and weight reduction is achieved. The one described in Patent Document 1 is a pair of half members press-formed into a substantially U-shaped cross section to constitute a pedal arm, and further, these pair of half members are overlapped and integrated by welding. It has a structure.

JP 2007-122610 A

However, as described in Patent Document 1, in the case of a structure having a joint in which a pair of half members are overlapped and integrated by welding, a process of welding for integrating the half members together. Is a necessity, so that manufacturing costs increase due to welding, and processing problems such as welding distortion occur.
In the background of the above circumstances, the present invention does not require welding when the pedal arm has a hollow structure, and it is possible to reduce the weight while maintaining practical strength, and a method of manufacturing the same. It was made for the purpose of providing.

The vehicle pedal according to the present invention is a tread portion operated by a driver's foot;
And a pedal arm provided with the step portion on the distal end side and provided with a supported portion rotatably supported on the vehicle body on the proximal end side,
The pedal arm is formed in a metal tube having no joint in the circumferential direction, and a proximal end side is formed with a thin-walled expanded portion having a longer outer peripheral length than a portion on the distal end side of the pedal arm. It features.
According to the pedal for a vehicle of the present invention, even when the thickness of the metal pipe is reduced and the weight thereof is reduced, the pedal arm has a hollow structure, so that practical strength can be maintained. Further, in the vehicle pedal of the present invention, the pedal arm is formed in a metal tube having no joint in the circumferential direction, and it is necessary for integration when a structure in which a pair of half members are overlapped is adopted. It is possible to eliminate the need for welding. Here, the circumferential direction in the present invention is a direction around the tube axis of the pedal arm configured in a metal tube.

  Furthermore, the vehicle pedal according to the present invention is characterized in that the base end side of the pedal arm is formed with a thin-walled expanded tube portion whose outer peripheral length is longer than a portion on the front end side of the pedal arm. On the base end side of the pedal arm where high rigidity is required, rigidity is formed while the increase in weight is suppressed by forming an enlarged diameter portion whose outer peripheral length is longer and thinner than the portion on the tip end side of the pedal arm. Can be enhanced.

Furthermore, in the vehicle pedal according to the present invention, the connecting pipe portion whose outer peripheral length is shorter than that of the expanded pipe portion is located further to the distal end side than the expanded pipe portion at a position closer to the end than the expanded pipe portion of the pedal arm even a thick contraction pipe portion and thick short circumferential length, that form a. For the tip side of the pedal arm that does not require as much rigidity as the base end side, the backward direction of the pedal arm in the vehicle mounted state (rear direction of the vehicle) by forming a reduced diameter tube with a short outer periphery It is possible to avoid interference with the foot tip of the driver located at and the dash panel or floor surface (floor mat) located in the front direction of the pedal arm (the front direction of the vehicle).

In the vehicle pedal of the invention, the pedal arm, and the site of cross-sectional shape is substantially oval, cross-sectional shape is substantially Ru can be configured of a combination of a perfect circular portions. By making the cross-sectional shape substantially oval, the cross-sectional coefficient in the specific coordinate axis direction can be increased, and the rigidity of the pedal arm can be improved. Here, the term "generally oval" includes not only oval but also rectangles having a longitudinal direction and rounded quadrilaterals.
By the way, in the case of a pedal for a vehicle, a bending process for avoiding interference with a driver's foot, a dash panel on the vehicle side, a floor surface or the like is required. Therefore, good bending processability is required for the pedal arm. Be For this reason, it is desirable that the cross-sectional shape of the portion where it is not necessary to increase the rigidity in the specific direction be a substantially round shape excellent in bending workability. Here, the substantially circular shape is a circular shape in which the deviation of the maximum value and the minimum value of the diameter is less than about 10%.

Here, in the pedal for a vehicle according to the present invention, the base end side of the pedal arm is formed with a tubular expansion portion having a substantially oval cross-sectional shape whose longitudinal direction is a direction orthogonal to the pivot axis in the supported portion to, Ru can be cross-sectional shape substantially forms a reduced pipe portion of the complete round. If a substantially oval expanded pipe portion is formed on the base end side of the pedal arm with the longitudinal direction being the direction orthogonal to the pivot axis of the supported portion, high rigidity can be obtained in the front and back directions in which the pedal load acts. it can. On the other hand, in order to secure bending workability, it is desirable that the cross-sectional shape of the tip end side of the pedal arm to be subjected to bending processing according to the layite on the vehicle body side be substantially circular.

Also in the present invention, the junction or in the vicinity of the step parts in the front end side of the pedal arm, Ru can be left to form a through hole penetrating the peripheral wall of the pedal arm in and out. In this way, the paint that has flowed into the pedal arm in the painting process can be discharged to the outside through the through hole.

Next, in the method of manufacturing a pedal for a vehicle according to the present invention, the tread portion operated by the driver's foot and the tread portion are provided on the distal end side, and are rotatably supported on the vehicle body on the proximal end side. What is claimed is: 1. A method of manufacturing a vehicle pedal, comprising: a pedal arm provided with a supported portion;
As a material pipe of the pedal arm, a metal pipe having a constant outer diameter and thickness in the axial direction and having no joint in the circumferential direction is used to expand the diameter of the base end of the metal pipe to form a pipe expansion portion The tip end side is reduced in diameter to form a constricted tube portion, or a pair of opposing peripheral wall portions on the tip end side is pressed and deformed to form a flat portion, and the expanded portion is further formed in the supported portion. It is characterized in that it is flattened into a substantially oval shape whose longitudinal direction is a direction orthogonal to the rotation axis.
According to such a manufacturing method, the above-mentioned vehicle pedal can be manufactured using a general-purpose metal pipe. In addition, the circumferential length difference between the base end side and the tip end side of the pedal arm can be obtained by using the diameter expansion deformation on the base end side and the diameter reduction deformation on the tip end side together with the metal tube constituting the pedal arm. It can be made large, and coexistence of securing of rigidity on the proximal end side and interference avoidance with the peripheral part on the distal end side can be achieved. In addition, on the tip end side of the pedal arm, it is possible to avoid interference with the peripheral part by forming a flat portion obtained by pressing and deforming a pair of peripheral wall portions instead of the reduced diameter portion by reduced diameter deformation. is there.

  According to the present invention as described above, a vehicle pedal which can be reduced in weight while maintaining a practical strength, and a method of manufacturing the same, by eliminating the joint by welding when forming the pedal arm into a hollow structure Can be provided.

It is a perspective view showing a brake pedal of one embodiment of the present invention. It is the perspective view which showed the brake pedal of FIG. 1 from the direction different from FIG. (A) is a front view of the brake pedal of FIG. (B)-(F) is the figure which showed the cross-sectional shape in the site | part from which the axial direction position of a pedal arm differs. It is a side view of the brake pedal of FIG. It is a top view of the brake pedal of FIG. It is explanatory drawing of the manufacturing method of the brake pedal of FIG. FIG. 7 is an explanatory view of a manufacturing method continued from FIG. 6; It is the figure which showed the principal part of the brake pedal of other embodiment of this invention.

  Next, a vehicle pedal according to an embodiment of the present invention will be described based on the drawings. Note that "forward" and "rearward" in FIGS. 4 and 5 indicate "front of vehicle" and "rearward of vehicle", and "left" and "right" in FIGS. , “Left direction of the vehicle” and “right direction of the vehicle”.

  In FIGS. 1-5, 10 is a brake pedal as a vehicle pedal. The brake pedal 10 includes a pedal arm 14 and a step 12 operated by the driver's foot.

  The tread 12 is formed of a metal plate which is wide in the left-right direction. As shown in FIG. 4, the tread portion 12 has a curved shape in which the central portion bulges in the rear direction (rear direction of the vehicle) in a side view and is welded to the tip side of the pedal arm 14 so that the tread surface 12a is obliquely upward. It is joined.

  The pedal arm 14 is composed of a hollow metal tube which is seamless in the circumferential direction. On the base end side (upper side in the drawing) of the pedal arm 14, the peripheral walls opposed in the left-right direction are flattened, and a pair of flat portions 15a and 15b are formed. First through holes 16a and 16b are formed in the vicinity of the base end (upper end in the drawing) of the flat portions 15a and 15b. A cylindrical collar 18 is inserted through the first through holes 16 a and 16 b, and the collar 18 is welded to the pedal arm 14. In the vehicle assembled state, a support shaft (not shown) on the vehicle body side is inserted through the inside of the collar 18. In this example, the collar 18 functions as a supported portion rotatably supported on the vehicle body.

  Further, a pair of second through holes 20a, 20b are bored below the first through holes 16a, 16b in the pair of flat portions 15a, 15b. A rod (not shown) extending toward the booster in a vehicle-mounted state is connected to the second through holes 20a and 20b.

  The pedal arm 14 uses a metal tube whose outer diameter and thickness are constant in the axial direction as a material tube, and diameter expansion processing is performed on one end side (base end side) thereof, and the other end side (tip end side) The diameter reduction process is applied to

  In FIG. 3, reference numeral 21 denotes a raw pipe portion formed near the tip of the pedal arm 14, which is a portion where the outer diameter and thickness of the material pipe are maintained as it is. The cross-sectional shape in the direction orthogonal to the axial direction of the raw pipe portion 21 is a substantially perfect circle having an outer diameter of 34 mm as shown in FIG.

At a position on the tip end side of the raw pipe portion 21 in the pedal arm 14, a contraction pipe portion 22 obtained by reducing the diameter of the material pipe is formed. The reduced-diameter portion 22 is formed so that the outer peripheral length is shorter than the original tube portion 21 and the wall thickness is increased. Here, the original pipe part 21 located between the expanded pipe part 24 and the contracted pipe part 22 and connecting them corresponds to the connecting pipe part in the present invention.
The contracted portion 22 is a tapered first contracted portion 22a whose outer peripheral length (outer diameter) changes toward the tip end in the axial direction, and an outer peripheral length located at the distal end side of the first reduced pipe portion 22a And a second reduced-diameter portion 22b having a constant outer diameter). The cross-sectional shape of the second reduced diameter portion 22b in this example is a substantially round shape having an outer diameter of 25 mm as shown in FIG. 3B, and the outer periphery of the second reduced diameter portion 22b with respect to the original tube portion 21. The change rate of the length is about 26%. And the site | part of the front end side of the pedal arm 14 containing the original pipe part 21 and the pipe contraction part 22 is bent in the left rear direction, and the tread part 12 is weld-joined to the front end.

  As described above, by forming the reduced-diameter portion 22 with a small outer diameter on the tip end side of the pedal arm 14, in the present embodiment, the foot tip of the driver located behind the pedal arm 14 or the front side of the pedal arm 14 Interference with the located dash panel or floor can be avoided.

  On the other hand, at a position on the base end side (upper side in the figure) of the original pipe portion 21, an expanded pipe portion 24 obtained by expanding and deforming the metal pipe is formed. The expanded tube portion 24 is formed to have a longer outer peripheral length and a smaller wall thickness than the original tube portion 21. As shown in (D), (E) and (F) of FIG. 3, the cross-sectional shape of the expanded tube portion 24 in this example is such that the outer peripheral length is longer toward the proximal end of the pedal arm 14 and the wall thickness is It is formed to be thin. At the proximal end (see FIG. 3F) of the pedal arm 14 with the longest outer circumferential length, the rate of change of the outer circumferential length relative to the original pipe portion 21 is about 20%.

  Further, as shown in FIG. 5, the cross-sectional shape of the expanded tube portion 24 is a long oval in the longitudinal direction which is the turning direction of the pedal. That is, the longitudinal direction of the expanded portion 24 is a direction orthogonal to the rotation axis C of the supported portion 18. By setting the longitudinal direction of the expanded portion 24 in this manner as the longitudinal direction in which the brake pedal rotates, the cross sectional coefficient in the longitudinal direction of the pedal arm 14 is increased, and deformation of the pedal arm 14 when a large pedal load acts It can be more effectively suppressed.

Next, a method of manufacturing the brake pedal according to the present embodiment will be described. In this embodiment, a metal pipe 28 made of a straight tubular carbon steel pipe for machine structure (STKM 13A) having an outer diameter of 34.0 mm, a thickness of 2.3 mm and a length of 450 mm is used as a material pipe of the pedal arm 14.
First, in the diameter increasing step shown in FIG. 6, the base end side 28a of the metal tube 28 is subjected to diameter enlargement and deformation. In this diameter increasing step, the base end side 28 a of the metal tube 28 is gradually diameter-deformed using a plurality of diameter increasing tools 30.

  Here, as the diameter expansion tool 30, the first diameter expansion tool 30A, the second diameter expansion tool 30B, and the third diameter expansion tool 30C are used. Each of the diameter expansion tools 30A, 30B, and 30C is formed with tapered pressing surfaces 32A, 32B, and 32C that press the inner peripheral surface of the metal tube 28, respectively. The outer diameters of these pressing surfaces are set to be the smallest in the first diameter increasing tool 30A and the largest in the third diameter increasing tool 30C.

  At the time of diameter expansion, the end of the base end side 28a of the metal pipe 28 is fixed in a state where the front end side 28b of the unprocessed metal pipe 28 shown in FIG. 6 (I) is fixed by a fixing member not shown. The diameter expansion tool is pushed into the portion opening 29 in the order of the first diameter expansion tool 30A, the second diameter expansion tool 30B, and the third diameter expansion tool 30C, and the diameter of the proximal end 28a is stepwise increased in a predetermined outer periphery An expanded section 24 with a length is formed. In FIG. 6, the metal tubes 28 described below the diameter expansion tools 30A, 30B and 30C show the state of the metal pipes 28 after the diameter expansion deformation with the corresponding diameter expansion tools 30A, 30B and 30C. ing.

  In the third diameter increasing tool 30C, the tapered pressing surface 32C is set longer in the axial direction than the other diameter increasing tools, and after the diameter enlargement by the third diameter increasing tool 30C is completed, the metal tube 28 is formed. The expanded tube portion 24 is in a state of being expanded in a trumpet shape as shown in FIG. 6 (IV). At this time, the outer diameter of the base end (upper end) of the metal tube 28 is about Φ 40 mm.

  In the present embodiment, by the above-described diameter increasing process, the expanded diameter portion 24 whose outer peripheral length is longer and thinner than the portion on the distal end side is formed on the base end side 28 a of the metal tube 28. In the diameter increasing step of this embodiment, the diameter of the base end side 28a of the metal tube 28 is gradually expanded using a plurality of diameter increasing tools 30, but in some cases, the predetermined diameter is obtained by one diameter expansion. It is also possible to make it a diameter-expanded shape.

  Next, in the diameter reducing step shown in FIG. 7, the tip end side 28b of the metal tube 28 is reduced in diameter and deformed. In this diameter reducing step, the tip end side 28b of the metal tube 28 is reduced in diameter in a stepwise manner using a plurality of dies 40 for diameter reduction.

  Here, the first die 40A and the second die 40B are used as the dies 40 for diameter reduction. Pressing surfaces 42A and 42B for pressing the outer peripheral surface of the metal tube 28 are formed on the dies 40A and 40B, respectively. The inner diameters of these pressing surfaces are set to be large for the first die 40A and small for the second die 40B.

  At the time of diameter reduction, first, the tip end side 28b of the metal tube 28 is pushed into the first die 40A, and the outer peripheral surface of the metal tube 28 is pressed radially inward by the pressing surface 42A of the first die 40A. The diameter of the tip end 28b of 28 is reduced to the diameter defined by the pressing surface 42A. Next, the tip end side 28b of the metal tube 28 is pushed into the second die 40B, and the diameter of the tip end side 28b of the metal tube 28 is reduced to the target diameter defined by the pressing surface 42B. In FIG. 7, the metal tube 28 described above each of the dies 40A and 40B represents the state of the metal tube 28 after being reduced in diameter by the corresponding dies 40A and 40B. As shown in FIG. 7 (III), after the diameter is reduced by the second die 40B, the tapered first reduced pipe portion 22a and the first reduced pipe portion 22a are provided on the tip end side 28b of the metal tube 28. A second contraction pipe portion 22b located on the tip end side and having a constant outer diameter ((25 mm in this example) is formed. When buckling occurs in the metal tube 28 due to the pushing force at the time of diameter reduction, as shown in FIG. 7 (III), the buckling preventing sleeve 44 is externally fitted to the outside of the corresponding portion to perform buckling. It is also possible to prevent the occurrence of

In the diameter reduction step shown here, the diameter reduction deformation is performed while applying a compressive force (pushing force) in the axial direction of the metal tube 28. Instead of this, the tensile direction in the axial direction of the metal tube 28 It is also possible to reduce the diameter while applying the force of. In this case, it is possible to suppress the degree of increase in the thickness (increase relative to the thickness of the original pipe portion 21) of the contracted portion 22 shown in FIG. 3B, and further weight reduction can be realized. .
In the present embodiment, as described above, the metal tube 28 in which the diameter of the proximal end 28a is expanded and the diameter of the distal end 28b is reduced is obtained through the diameter expansion step and the diameter reduction step.

  Next, the metal pipe 28 is subjected to bending. In this example, bending processing corresponding to the first bending portion 25, the second bending portion 26, and the third bending portion 27 (see FIGS. 3 and 4) is performed to obtain a predetermined bending shape.

Further, flattening is performed on the portion of the base end side 28 a of the metal pipe 28 that has been diameter-expanded and deformed into a trumpet shape in the above-described diameter expansion step. In the flattening step, the left and right peripheral walls of the base end side 28a of the metal tube 28 are pressed radially inward by a mold provided with a pair of flat processing surfaces, and the pair of flat portions opposed in the left and right direction While forming 15a, 15b, let the cross-sectional shape of the expanded tube part 24 be an oval. By doing this, a pedal arm 14 having a predetermined shape can be obtained.
In addition, although the cross-sectional shape of the expanded tube part 24 was made into the ellipse in this example, it is also possible to set it as the rectangle which has a longitudinal direction, and a square corner square. In addition, the order of the bending process and the flattening process described above can be reversed as necessary.

After that, the first through holes 16a and 16b and the second through holes 20a and 20b are drilled, and the collar 18 and the step joint 12 are welded and joined to the pedal arm 14. Furthermore, the surface is coated and the brake pedal 10 is Complete.
In the present embodiment, as shown in FIG. 2, a through hole 50 is formed in the joint with the step 12 on the tip end side of the pedal arm 14 so as to penetrate the peripheral wall of the pedal arm 14 inside and outside. The excess paint which has flowed into the inside of the pedal arm 14 in the process of is discharged to the outside through the through hole 50.

  As described above, in the brake pedal 10 of the present embodiment, the pedal arm 14 is configured by the metal pipe 28 having no joint in the circumferential direction, and the thickness of the metal pipe 28 is reduced to reduce the weight. Also, since the pedal arm 14 has a hollow structure, practical strength can be maintained. Moreover, welding for integration can be made unnecessary when adopting a structure in which a pair of half members are overlapped.

  Further, in the brake pedal 10 of the present embodiment, the reduced-diameter tubular portion 22 having a short outer peripheral length is formed on the tip end side of the pedal arm 14, and the large-diameter tubular portion 24 having a long outer peripheral length is formed on the base end side. On the proximal end side of the pedal arm 14 that requires high rigidity, the rigidity can be enhanced by forming the expanded tube portion 24 having a long outer peripheral length. On the other hand, the driver located at the rear side of the pedal arm 14 is formed by forming the reduced-diameter portion 22 having a short outer peripheral length, that is, a small diameter on the distal end side of the pedal arm 14 where rigidity near the proximal end is not required. It is possible to avoid interference with the toe of the foot, the dash panel located on the front side of the pedal arm, and the like.

Furthermore, in the brake pedal 10 of the present embodiment, an oval expanded portion 24 whose longitudinal direction is a direction orthogonal to the pivot axis C of the supported portion 18 is formed on the base end side of the pedal arm 14. Therefore, the cross-sectional coefficient in the front-rear direction in which the brake pedal is depressed can be increased, and deformation of the pedal when pedal load acts can be more effectively suppressed.
On the other hand, a substantially circular contraction portion 22 is formed on the tip end side of the pedal arm 14, and good bending workability can be secured.

  In the brake pedal 10 configured in this manner, the amount of bending (offset amount) in the vehicle width direction of the pedal arm 14 is about 60 mm, compared to the conventional brake pedal in which the pedal arm is formed of a metal plate of 8 mm. It is possible to realize a weight reduction of about 30 to 40% while maintaining practical strength.

  Further, in the method of manufacturing the brake pedal 10 of the present embodiment, the metal tube 28 having a constant outer diameter and thickness in the axial direction and having no seam in the circumferential direction is used as the material tube of the pedal arm 14. The end side 28 a is expanded and deformed to form the expanded pipe portion 24, and the tip end side 28 b is contracted and deformed to form a contracted pipe portion 22, and the expanded pipe portion 24 is further rotated along with the pivot axis C of the supported portion 18. It is flattened in an oval shape whose longitudinal direction is the orthogonal direction. According to such a manufacturing method, it is possible to manufacture the brake pedal 10 which can be reduced in weight while maintaining practical strength by using the general-purpose metal pipe 28 as a material pipe. In addition, by using the diameter expansion deformation and the diameter reduction deformation in combination, the difference in outer peripheral length between the base end side and the tip end side of the pedal arm 14 can be increased. For this reason, coexistence of ensuring of rigidity on the proximal end side and interference avoidance with the peripheral part on the distal end side can be achieved.

  FIG. 8 is a view showing the main part of another embodiment of the present invention. As shown to the same figure, the flat part 60 is formed in the front end side rather than the original pipe part 21 of the brake arm 10B of the brake arm 10B of this example. In the flat portion 60, as shown in FIG. 8B, the pair of circumferential wall portions 60a and 60b facing each other in the front-rear direction (see FIG. 4), which is the pivoting direction of the pedal arm 14B, are in the radial direction It is pressed inward, and the distance t between the outer surfaces thereof is smaller than the outer diameter of the original pipe portion 21.

  As described above, on the distal end side of the pedal arm 14B, it is necessary to avoid interference with the driver's foot, the dash panel, and the floor surface. In the first embodiment (the brake pedal 10), the contraction tube portion 22 is formed on the tip end side of the pedal arm 14. However, instead of this, the flat portion 60 shown in FIG. It is possible to avoid interference with the site.

  The embodiments of the present invention have been described above in detail, but these are merely examples. Although the case of a brake pedal was taken as an example in the above-mentioned embodiment, not only this but the present invention is also applicable to a clutch pedal. Further, the material of the material tube, the outer diameter, the thickness, the shapes of the pedal arm and the tread portion, etc. are not limited to the above embodiment, and can be appropriately changed to ones having equivalent effects. Can be implemented in variously modified forms without departing from the scope of the invention.

10, 10B brake pedal (vehicle pedal)
12 Stepping part 14, 14B Pedal arm 18 color (Supported part)
21 Pipe section (connection pipe section)
Reference Signs List 22 pipe contraction part 24 pipe expansion part 28 metal pipe 50 through hole 60 flat part 60a, 60b peripheral wall part C rotation shaft

Claims (5)

The tread part operated by the driver's foot,
And a pedal arm provided with the step portion on the distal end side and provided with a supported portion rotatably supported on the vehicle body on the proximal end side,
The pedal arm is formed into a metal tube having no seam in the circumferential direction, and the proximal end side has a thinner expanded tubular portion whose outer peripheral length is longer than a portion on the distal end side of the pedal arm toward the proximal end It is formed so that its outer peripheral length is long and its thickness is thin ,
A connecting pipe section whose outer peripheral length is shorter than the expanded pipe section from the expanded pipe section to the front end side of the pedal arm, and an outer peripheral length shorter than the connected pipe section which is positioned further to the front end than the connected pipe section And the thick-walled contraction pipe part is formed, The pedal for vehicles characterized by the above-mentioned. The pedal for a vehicle according to claim 1, wherein the expanded tube portion is formed over at least a half or more of the axial length of the pedal arm . The pedal arm is formed on the proximal end side with the expanded tube portion having a substantially oval cross-sectional shape whose longitudinal direction is a direction orthogonal to the pivot axis of the supported portion, and the cross-sectional shape is formed on the distal end side. The pedal for a vehicle according to any one of claims 1 and 2, characterized in that the reduced pipe portion of substantially circular shape is formed. The joint or in the vicinity of the step parts in the front end side of the pedal arm, any one of claims 1-3, characterized in that the through-hole penetrating the peripheral wall of said pedal arm in and out is formed The vehicle pedal according to the item. It has a footstep operated by the driver's foot, and a pedal arm provided with the footboard on the tip end side and a supported portion rotatably supported on the vehicle body on the base end side. Method of manufacturing a vehicle pedal,
As the material tube of the pedal arm, the outer periphery at a constant outer diameter and wall thickness in the axial direction, using a metal tube seamless circumferentially, the base end side of the metal pipe by diameter variations than the original pipe section The long, thin walled tubular portion is formed such that its outer peripheral length is longer and its thickness is thinner toward the proximal end, and the diameter of the distal end side is reduced to be smaller than that of the original pipe portion. Either form a tubular contraction with a short length and a large thickness , or press-deform a pair of opposing peripheral walls at the tip end to form a flat, and further, support the expanded section as the support A method of manufacturing a pedal for a vehicle comprising: flattening a substantially oval shape having a longitudinal direction in a direction orthogonal to a pivot axis in a part.

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