JP7247137B2 - Operation pedal device for vehicle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vehicle operation pedal device having an arm body made of resin.

Conventionally, various techniques have been proposed for the vehicle operation pedal device. For example, the technique described in Patent Document 1 below is a foot-operated parking brake device that operates a parking brake provided in a vehicle. a pedal arm provided with a plurality of teeth aligned in a direction; and an engagement member for engaging with the teeth to prevent the pedal arm from returning when the pedal arm is stepped on, the pedal arm comprising: 2. The tooth is made of resin by molding a resin material, and the teeth are integrally molded. Further, the pedal arm is characterized by being formed with a first rib that extends in the rotation centerline direction and that is integrally formed with the teeth. Further, the pedal arm is formed with a cylindrical portion into which the support shaft is inserted, and a second rib connecting the cylindrical portion and the first rib.

Japanese Unexamined Patent Application Publication No. 2016-2909

According to the description of Patent Document 1, in the foot-operated parking brake device, the pedal arm is made of resin and a plurality of teeth are formed integrally with the pedal arm. lighter in comparison. Further, since the ribs are formed to reinforce the pedal arm, the reduction in strength of the pedal arm when made of resin is suppressed. Furthermore, since the tubular portion and the first rib are connected by the second rib, the strength of both the tubular portion and the first rib increases.

However, in the foot-operated parking brake device, the material of the pedal arm is resin, which has the property of being suddenly broken without being plastically deformed. Therefore, there is room for improvement in safety.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a vehicle operation pedal device that further improves safety.

The invention according to claim 1, which has been made to solve this problem, is an operation pedal device for a vehicle, which includes an arm body made of resin, and an arm body provided at one end portion of the arm body, which is provided at one end of the arm body and is stepped on to the front side of the vehicle when stepped on. a boss provided at the other end of the arm body and serving as the center of rotation of the arm body when stepping on the arm; between the connecting portion that rotatably connects the arm body to the part and the tread portion of the arm body and the connecting portion. and a breakage guide portion provided on the breakage line of the arm body for guiding the breakage of the arm body along the breakage line. is a line that passes through the front side of the vehicle relative to the connecting portion and the boss.

The invention according to claim 2 is the vehicle operation pedal device according to claim 1, characterized in that the fracture starting point is formed on the rear side of the arm main body in the vehicle.

The invention according to claim 3 is the vehicle operation pedal device according to claim 2, wherein the fracture starting point has a constricted shape in which the vehicle rear side of the arm body is curved toward the vehicle front side. do.

The invention according to claim 4 is the vehicle operation pedal device according to claim 1 or claim 2, wherein the fracture starting portion is a groove having a V-shaped cross section.

The invention according to claim 5 is the vehicle operation pedal device according to claim 1 or claim 2, wherein the fracture starting portion is a groove having a concave cross section.

The invention according to claim 6 is the operation pedal device for a vehicle according to any one of claims 1 to 5, wherein the fracture guide portion is a groove having a V-shaped cross section. do.

The invention according to claim 7 is the vehicle operation pedal device according to any one of claims 1 to 6, wherein the arm body is erected, separated from the breaking line, and separated from the connecting part. It is characterized by having ribs that reinforce the connecting portion in a continuous form.

With the vehicle operation pedal device of the present invention, it is possible to further improve safety.

1 is a perspective view showing a vehicle operation pedal device according to an embodiment; FIG. It is the side view in which the operation pedal apparatus for vehicles was represented. FIG. 3 is a cross-sectional view of a pedal arm of the vehicle operation pedal device taken along line II in FIG. 2; FIG. 4 is an enlarged view of a part II of the cross section of FIG. 3 , showing a fracture guide portion of the vehicle operation pedal device; FIG. 3 is a diagram showing the position of a cross section for calculating a section modulus of a pedal arm of the vehicle operation pedal device; FIG. 4 is a diagram showing the relationship between the cross-sectional position of the pedal arm of the vehicle operation pedal device and the section modulus. It is the side view to which a part of pedal arm of the operation pedal apparatus for vehicles was expanded. FIG. 3 is a diagram showing a part of a cross section of a pedal arm of the vehicle operation pedal device cut along line III-III in FIG. 2; It is the side view in which the operation pedal apparatus for vehicles at the time of fracture|rupture was represented. It is the side view in which the example of a change of the operation pedal apparatus for vehicles was represented. It is the side view in which the same modification at the time of fracture|rupture was represented. FIG. 3 is a diagram showing a cross section of a pedal arm cut at a position corresponding to line II in FIG. 2, which is a modified example of the pedal arm of the vehicle operation pedal device; It is a figure showing the example of a change of the fracture|rupture starting point part of the operation pedal apparatus for vehicles.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a vehicle operating pedal device according to the present invention will be described based on a specific embodiment with reference to the drawings. In each drawing used for the following description, a part of the basic configuration is omitted, and the dimensional ratios and the like of each part drawn are not necessarily accurate.

In FIG. 1, the front-back direction, the up-down direction, and the left-right direction are as indicated in the drawing. In FIGS. 2 and 9 to 11, the front-rear direction and the up-down direction are as indicated in each figure. However, in FIG. 2 and FIGS. 9 to 11, the far side of the paper surface of the drawings is the right direction, and the front side of the paper surface of the drawings is the left direction.

The vehicle operation pedal device of the present embodiment is attached to a vehicle as described later. Therefore, in the following description, the front side may be referred to as the "vehicle front side" and the rear side may be referred to as the "vehicle rear side". Also, the front-rear direction may be referred to as the "vehicle front-rear direction", and the left-right direction may be referred to as the "vehicle width direction".

As shown in FIGS. 1 and 2, the vehicle operation pedal device 10 of this embodiment includes a base member 20, a pedal arm 40, and the like. The base member 20 and the pedal arm 40 are resin molded products manufactured by injection molding molten resin. Carbon fiber reinforced resin or glass fiber reinforced resin is used as the molten resin. In addition, in FIG. 2, the base member 20 is represented by a two-dot chain line. This point also applies to FIGS. 9 to 11 described later.

The base member 20 includes a front base member 22, a rear base member 24, a left base member 26, a right base member 28, and the like. The front base member 22 and the rear base member 24 face each other in the front-rear direction. On the other hand, the left base member 26 and the right base member 28 face each other in the left-right direction.

Further, the left base member 26 and the right base member 28 are connected to the front base member 22 and the rear base member 24 at both front and rear ends thereof. Thereby, an opening 30 is formed in the center of the base member 20 surrounded by the front base member 22 , the rear base member 24 , the left base member 26 and the right base member 28 . Therefore, the base member 20 has a frame shape in plan view.

A pair of mounting holes 23 , 23 are formed in the front base member 22 at both left and right ends thereof. A pair of mounting holes 25 , 25 are formed in the left and right ends of the rear base member 24 . Metal collars (not shown) are fitted into the mounting holes 23, 23, 25, 25 by insert molding. Fixing bolts (not shown) are inserted into the collars of the mounting holes 23 , 23 , 25 , 25 while the base member 20 is in contact with the vehicle floor 101 . The base member 20 is thereby fixed to the vehicle floor 101 .

The lower end of the pedal arm 40 is interposed between the left and right base members 26 and 28 toward the rear base member 24, and is rotatably supported by the pivot pin 12 and the like. Therefore, the left and right base members 26, 28 near the rear base member 24 are shaped to protrude upward, and a metal collar (not shown) for passing the pivot pin 12 is formed by insert molding. is provided. The left base member 26 is in contact with the head portion of the pivot pin 12 . On the other hand, in the right base member 28, the tip of the pivot pin 12 protrudes rightward, and a retaining pin (not shown) is attached to the protruding portion.

The pedal arm 40 has an arm body 42 . The arm body 42 is elongated in the vertical direction and is formed of a wall surface or the like that is parallel to the front-rear direction of the vehicle. The arm body 42 has a laterally symmetrical outer shape. Therefore, the left side shape of the arm body 42 shown in FIGS. 1 and 2 etc. will be described below, and the description of the right side shape of the arm body 42 will be omitted.

A tread portion 44 is provided on the vehicle rear side of the upper end portion of the arm body 42 . The tread portion 44 is composed of a flat surface or the like parallel to the vehicle width direction, and is covered with a pedal pad 45 made of rubber, aluminum, or the like. Therefore, the tread portion 44 is stepped on via the pedal pad 45 .

A first cylindrical portion 46 , a second cylindrical portion 48 , and six cylindrical ribs 50 are erected at the lower end of the arm body 42 . The central axes of the first cylindrical portion 46 and the second cylindrical portion 48 are parallel to the vehicle width direction. The first cylindrical portion 46 is a boss of the arm body 42, into which the pivot pin 12 described above is inserted. Therefore, the center of the first cylindrical portion 46 becomes the center of rotation of the arm body 42 when the vehicle driver steps on the tread portion 44 with the foot (shoe) 103 toward the front of the vehicle.

A metal collar (not shown) into which the pivot pin 12 is inserted may be provided on the first cylindrical portion 46 by insert molding. Further, in the following description, the stepping operation of the vehicle driver depressing the tread 44 with the foot (shoe) 103 toward the front of the vehicle is referred to as "stepping operation", and the time of the stepping operation is "during the stepping operation". is written as

The second cylindrical portion 48 is provided in the arm body 42 in such a manner that the first cylindrical portion 46 is contained in its cavity. Between the first cylindrical portion 46 and the second cylindrical portion 48, six cylindrical ribs 50 are radially provided at equal pitches.

A step portion 52 is provided between the tread portion 44 of the arm body 42 and the first cylindrical portion 46 . The stepped portion 52 is formed by arranging a part of the wall surface of the arm body 42 at a position on the left side of the other wall surface, and the stepped portion 52 gradually increases from the vicinity of the center of the arm body 42 in the longitudinal direction of the vehicle toward the front side of the vehicle. It spreads vertically. Inside the arm body 42 , a space (hereinafter referred to as “space region 53 ”) is formed between the left and right stepped portions 52 . The space area 53 communicates with the outside of the arm body 42 through its opening on the front side of the vehicle.

A third cylindrical portion 54 is erected on the stepped portion 52 of the arm body 42 near the rear side of the vehicle. The central axis of the third cylindrical portion 54 is parallel to the vehicle width direction. The cavity of the third cylindrical portion 54 communicates with the spatial region 53 .

A clevis 94 is inserted into the space area 53 from an opening on the front side of the vehicle. The tip of the operating rod 92 is fixed to the clevis 94 . Furthermore, a connecting pin (not shown) is attached to the clevis 94 within the space area 53 by being inserted into the cavity of the third cylindrical portion 54 . Thereby, the tip of the operating rod 92 is rotatably connected to the arm body 42 .

The operating rod 92 protrudes from the dash panel toward the rear of the vehicle, and its direction of protrusion can be freely changed. When the operating rod 92 is displaced to the front side of the vehicle due to the depression operation, the operating force during the depression operation is transmitted to a braking device or a control device that controls the operating state of the vehicle through a hydraulic circuit, an electronic circuit, or the like. As a result, the vehicle is controlled according to the amount of operation (pedal stroke, pedal force, etc.) due to the depression operation. Therefore, the pedal arm 40 may be used as a brake pedal, or may be used as each pedal used in a vehicle (for example, an accelerator pedal, a clutch pedal, a foot parking brake pedal, etc.).

A first edge surface portion 56 is provided between the lower end of the tread surface portion 44 and the second cylindrical portion 48 on the vehicle rear side of the arm body 42 . The first edge surface portion 56 is composed of a plurality of flat surfaces, curved surfaces, or the like parallel to the vehicle width direction. On the vehicle front side of the arm body 42 , a second edge surface portion 58 is provided between the upper end portion of the tread surface portion 44 and the second cylindrical portion 48 . The second edge surface portion 58 is composed of a plurality of flat surfaces, curved surfaces, or the like parallel to the vehicle width direction.

In the arm body 42, between the tread portion 44 and the second cylindrical portion 48, a first parallel rib 60 is erected along the first edge surface portion 56, and a second parallel rib 62 extends along the second edge surface portion. It is erected along 58. A lower end of the second parallel rib 62 continues to the second edge surface portion 58 and the second cylindrical portion 48 .

Four first intermediate ribs 64A, 64B, 64C, and 64D are erected between the first parallel rib 60 and the first edge surface portion 56 on the arm body 42 . Each of the first intermediate ribs 64A, 64B, 64C, 64D spans between the first parallel rib 60 and the first edge surface portion 56. As shown in FIG. 2 and FIGS. 3, 9 to 11, and 12, which will be described later, one of the first intermediate ribs 64A, 64B, 64C, and 64D is designated by a reference numeral 64. Reference numerals 64A, 64B, 64C and 64D are not shown. Further, in the following description, the first intermediate ribs 64A, 64B, 64C, and 64D are collectively referred to as "first intermediate ribs 64" without distinction.

Further, the arm body 42 has four second intermediate ribs 66A, 66B, 66C, 66D erected between the second parallel rib 62 and the second edge surface portion 58. As shown in FIG. Each of the second intermediate ribs 66A, 66B, 66C, 66D is provided between the second parallel rib 62 and the second edge surface portion 58. As shown in FIG. 2, 3, 9 to 11, and 12, which will be described later, one of the second intermediate ribs 66A, 66B, 66C, and 66D is denoted by a reference numeral 66. 66A, 66B, 66C and 66D are not described. Further, in the following description, when collectively referring to the second intermediate ribs 66A, 66B, 66C, and 66D without distinguishing them, they are referred to as "second intermediate ribs 66".

A first lateral rib 68 is erected on the arm body 42 between the tread portion 44 and the second edge surface portion 58 . The first lateral rib 68 extends between the tread portion 44 and the second edge portion 58 in the vehicle front-rear direction from the vicinity of the vertical center of the tread portion 44 . A lower portion of the first lateral rib 68 near the center in the vehicle front-rear direction is connected to the upper end of the second parallel rib 62 .

A second horizontal rib 70 is erected on the arm body 42 between the tread portion 44 and the second parallel rib 62 . The second lateral rib 70 extends between the tread portion 44 and the second parallel rib 62 so as to extend from the lower end portion of the tread portion 44 along the vehicle front-rear direction.

A third parallel rib 72 is erected on the arm body 42 below the second horizontal rib 70 . The third parallel rib 72 extends along the second parallel rib 62 from below the second lateral rib 70 near the center in the longitudinal direction of the vehicle, and extends between the second lateral rib 70 and the first parallel rib 60 . is provided across. Thereby, the lower ends of the third parallel ribs 72 are connected to the upper ends of the first parallel ribs 60 .

Further, the vehicle rear side of the third parallel rib 72 continues to the upper end of the first edge surface portion 56 . As a result, the vehicle rear side wall surface of the third parallel rib 72 and the outer side wall surface of the first edge surface portion 56 intersect along the vehicle width direction, and a fracture starting point portion 74 is formed at the intersecting position. there is In this manner, the fracture starting point 74 is arranged between the tread portion 44 and the third cylindrical portion 54 of the arm body 42 and closer to the tread portion 44 . Details of the fracture starting point 74 will be described later.

A fourth parallel rib 76 is erected on the arm body 42 between the third parallel rib 72 and the step portion 52 . The fourth parallel rib 76 extends from the lower end of the third parallel rib 72 along the second parallel rib 62 and is provided between the third parallel rib 72 and the step portion 52 . Thereby, the lower ends of the fourth parallel ribs 76 are connected to the stepped wall surface of the stepped portion 52 .

The erected height of the fourth parallel rib 76 is the same as that of the step portion 52, but is smaller than the erected heights of the first, second and third parallel ribs 60, 62, 72, and so on. Incidentally, the standing height of the rib refers to the length from the base end to the tip end of the rib.

A third intermediate rib 78 is erected on the arm body 42 between the third cylindrical portion 54 and the first parallel rib 60 . The third intermediate rib 78 extends from a position on the first parallel rib 60 opposite to the position where the first intermediate ribs 64C are connected, and the extending direction of the third intermediate rib 78 matches the extending direction of the first intermediate rib 64C. , is provided between the third cylindrical portion 54 and the first parallel rib 60 .

A fourth intermediate rib 80 is erected on the arm body 42 between the third cylindrical portion 54 and the first parallel rib 60 . The fourth intermediate rib 80 extends from a position on the first parallel rib 60 opposite to the position where the first intermediate ribs 64D are connected, and the extending direction of the fourth intermediate rib 80 matches the extending direction of the first intermediate rib 64D. , is provided between the third cylindrical portion 54 and the first parallel rib 60 .

An inclined rib 82 is erected on the arm body 42 between the third cylindrical portion 54 and the second parallel rib 62 . The inclined rib 82 extends from the third cylindrical portion 54 and is provided so that its extending direction matches the extending direction of the fourth intermediate rib 80 , but is not continuous with the second parallel rib 62 . The tip of the inclined rib 82 continues to the stepped portion 52 by heading toward the arm main body 42 as it goes toward the second parallel rib 62 .

A fifth intermediate rib 84 is erected on the arm body 42 between the second cylindrical portion 48 and the first edge surface portion 56 . The fifth intermediate rib 84 is provided between the second cylindrical portion 48 and the first edge surface portion 56 . The upper side of the fifth intermediate rib 84 closer to the first edge surface portion 56 continues to the lower end of the first parallel rib 60 .

In the arm body 42 , a fracture line L is set along the third and fourth parallel ribs 72 and 76 in the vicinity of the vehicle front side of the third and fourth parallel ribs 72 and 76 . Furthermore, the arm main body 42 is formed with a fracture guide portion 86 on the fracture line L. As shown in FIG. When the lower end side of the fracture line L is extended, the fracture line L passes through the vehicle front side of the third cylindrical portion 54 and the first cylindrical portion 46 at the stepped portion 52 . The details of the fracture guide portion 86 will be described later.

As shown in FIG. 3, in the cross section of the pedal arm 40, the arm body 42 extends in the vehicle front-rear direction at the center in the vehicle width direction. The cross-sectional shape of the pedal arm 40 on the rear side of the vehicle forms an H shape by extending in the vehicle width direction from the arm main body 42 while the first parallel rib 60 and the first edge surface portion 56 maintain a predetermined interval. there is Furthermore, between the first parallel rib 60 and the first edge surface portion 56 , a first intermediate rib 64 extending in the vehicle width direction from the arm body 42 is provided between the first parallel rib 60 and the first edge surface portion 56 . It is handed over. As a result, the cross section of the pedal arm 40 on the rear side of the vehicle increases the strength against the load acting on the tread portion 44 toward the front side of the vehicle during the stepping operation.

Similarly, the cross-sectional shape of the pedal arm 40 on the front side of the vehicle is H-shaped due to the second parallel rib 62 and the second edge surface portion 58 extending in the vehicle width direction from the arm main body 42 while maintaining a predetermined spacing. shape. Further, between the second parallel rib 62 and the second edge surface portion 58, a second intermediate rib 66 extending in the vehicle width direction from the arm body 42 is provided between the second parallel rib 62 and the second edge surface portion 58. It is handed over. As a result, the cross section of the pedal arm 40 on the front side of the vehicle increases the strength against the load acting on the tread portion 44 toward the front side of the vehicle during the stepping operation.

On the other hand, the cross-sectional shape of the pedal arm 40 at the center in the vehicle front-rear direction is cross-shaped due to the fourth parallel rib 76 extending from the arm main body 42 in the vehicle width direction. The fourth parallel rib 76 has a smaller length from its proximal end to its distal end than the first and second parallel ribs 60, 62, and so on. Furthermore, at the center of the pedal arm 40 in the vehicle front-rear direction, the fracture line L is set along the fourth parallel rib 76 in the vicinity of the fourth parallel rib 76 on the front side of the vehicle, as described above.

As shown in FIG. 4, in the arm body 42, at a position adjacent to the base end of the fourth parallel rib 76 from the front side of the vehicle, that is, at the position of the fracture line L, a part of the surface side of the arm body 42 is V-shaped. It has a notch shape that looks like a letter-shaped notch. Such a notch shape is continuous from a position adjacent to the base end near the lower end of the fourth parallel rib 76 from the vehicle front side to a position adjacent to the base end near the upper end of the third parallel rib 72 from the vehicle front side. are doing. As a result, a groove having a V-shaped cross section is formed as the fracture guide portion 86 on the fracture line L of the arm body 42 . Therefore, in the arm body 42, the thickness of the portion where the fracture guide portion 86 is formed is thinner than the thickness of the other portions.

In this manner, in the cross section of the pedal arm 40 at the center in the vehicle front-rear direction, the strength against the load acting on the tread portion 44 toward the front side of the vehicle during the stepping operation is greater than that of the cross section of the pedal arm 40 on the rear side of the vehicle and the front side of the vehicle. It is set lower than each strength of the cross section.

As shown in FIGS. 5 and 6, in the pedal arm 40, the outer shape of the arm body 42 and the like is provided so that the section modulus of the section S5 is the lowest among the section moduli of the sections S1 to S15. there is The cross sections S1 to S15 are surfaces that appear when the pedal arm 40 is cut along the normal direction of the plane of the tread surface portion 44 at approximately equal intervals in the longitudinal direction of the pedal arm 40 .

As shown in FIG. 7, in the pedal arm 40, a fracture starting point 74 is provided at the edge of the cross section S5 on the vehicle rear side. The fracture starting point 74 is formed by forming a V-shaped part of the surface side of the third parallel rib 72 at a position where the vehicle rear side wall surface of the third parallel rib 72 and the outer side wall surface of the first edge surface portion 56 intersect. It has a notch shape that looks like a notch. Such a notch shape is continuous along the vehicle width direction. As a result, a groove having a V-shaped cross section is formed as the fracture starting point 74 on the vehicle rear side of the arm body 42 .

As shown in FIG. 8 , at the stepped portion 52 of the pedal arm 40 , the fracture line L passes between the second parallel rib 62 and the inclined rib 82 . In other words, the inclined rib 82 is separated from the fracture line L by forming a shape as if the tip portion thereof has been cut. Reference numeral 55 denotes a cavity of the above-described third cylindrical portion 54, which communicates with the space region 53 and into which the above-described connecting pin is inserted.

As shown in FIG. 9, in the vehicle operation pedal device 10 of the present embodiment, when a pedaling force FP exceeding the rating acts on the tread surface portion 44 during a stepping operation, stress increases at the fracture starting point portion 74 (stress concentration ), a crack 14 is generated in the fracture starting point 74, and the fracture of the arm body 42 is initiated. The crack 14 develops along the cross section S5 of the pedal arm 40, and when reaching the fracture line L, further propagates along the fracture guide portion 86. As shown in FIG. As a result, the breakage of the arm body 42 starting from the breakage starting point 74 is guided by the breakage guide portion 86 and performed along the breakage line L. As shown in FIG. The breaking line L is a line that passes through the front side of the vehicle relative to the third cylindrical portion 54 and the first cylindrical portion 46 .

Therefore, when the arm body 42 is broken, it is divided into a front divided body 42A on the vehicle front side of the crack 14 and a rear divided body 42B on the vehicle rear side of the crack 14. , both the third cylindrical portion 54 and the first cylindrical portion 46 remain. Therefore, the rear divided body 42B is rotatably supported by the operating rod 92 via the third cylindrical portion 54 and rotatably supported by the base member 20 via the first cylindrical portion 46. ing. As a result, after the arm main body 42 is broken, the first edge surface portion 56 between the breakage starting point portion 74 and the third cylindrical portion 54 of the rear split body 42B is held by the driver of the vehicle. When stepping on the front side of the vehicle at 103, the rear divided body 42B rotates toward the front side of the vehicle around the first cylindrical portion 46, thereby pushing the operating rod 92 toward the front side of the vehicle. state is controlled. In this manner, the vehicle operation pedal device 10 of the present embodiment is designed to further improve safety.

Further, when the tread portion 44 is stepped on to the vehicle front side, a tensile stress is generated in the first edge surface portion 56 on the vehicle rear side of the arm body 42, while the second edge surface portion on the vehicle front side of the arm body 42 is generated. A compressive stress occurs at 58 . Therefore, when the fracture starting point 74 is formed on the first edge surface portion 56 on the vehicle rear side of the arm body 42 as in the vehicle operation pedal device 10 of the present embodiment, the fracture starting point 74 is formed on the arm body. Since the crack 14 is more likely to occur at the breakage starting point 74 than when it is formed on the second edge surface portion 58 on the vehicle front side of 42 , breakage of the arm body 42 can be easily controlled.

In addition, in the vehicle operation pedal device 10 of the present embodiment, the fracture starting portion 74 is a groove having a V-shaped cross section. Therefore, in the vehicle operation pedal device 10 of the present embodiment, the fracture starting point 74 is easily provided on the arm body 42 .

Further, in the vehicle operation pedal device 10 of the present embodiment, the breakage guide portion 86 is a groove having a V-shaped cross section. Therefore, in the vehicle operation pedal device 10 of the present embodiment, the breakage guide portion 86 is simply provided on the arm body 42 .

Note that the fracture guide portion 86 may be a groove having a concave cross section, or may be a through hole, a depression, or the like that is intermittently continuous on the fracture line L.

In addition, in the vehicle operation pedal device 10 of the present embodiment, the inclined rib 82 is provided upright on the stepped portion 52 of the arm body 42 so as to be continuous with the third cylindrical portion 54 . isolated. Thus, in the vehicle operation pedal device 10 of the present embodiment, the inclined rib 82 reinforces the third cylindrical portion 54, while the breakage of the arm body 42 propagates from the breakage line L to the third cylindrical portion 54. prevent this from happening.

Incidentally, in the present embodiment, the upper end of the arm body 42 is an example of "one end of the arm body." The lower end of the arm body 42 is an example of "the other end of the arm body." The first cylindrical portion 46 is an example of a "boss". The third cylindrical portion 54 is an example of a “connecting portion”. The center of the first cylindrical portion 46 is an example of the "rotational center of the arm body". The slanted rib 82 is an example of a "rib." The operating rod 92 is an example of the "input part of the vehicle control mechanism".

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, the base member 20 and the pedal arm 40 may be formed by using a sheet-like fiber-reinforced resin as a reinforcing material for general resin moldings.

Further, although the present invention is the organ-type vehicle operation pedal device 10 in the above-described embodiment, it may be a suspension-type vehicle operation pedal device 110 as shown in FIGS. may 10 and 11 correspond to FIGS. 2 and 9 of the above embodiment. In the suspension type vehicle operation pedal device 110, instead of the base member 20 of the above-described embodiment, the pedal arm 40 rotates with respect to a pair of support members 112, 112 protruding from the dash panel D of the vehicle toward the vehicle rear side. movably supported. Other detailed description of the suspension type vehicle operation pedal device 110 will be omitted by assigning the same reference numerals to portions that are substantially common to the above-described embodiment in FIGS. 10 and 11 .

Also, the cross section of the pedal arm 40 shown in FIG. 3 may be changed to the cross section shown in FIG. 12, for example. In this modification, on the vehicle rear side of the pedal arm 40, a grid rib is formed by a plurality of rear ribs 63 erected toward the vehicle rear side from the first parallel rib 60 and the first intermediate rib 64. , the first edge surface portion 56 is formed at the tip of the grid rib, thereby increasing the strength of the cross section. Similarly, on the vehicle front side of the pedal arm 40, a lattice rib is formed by a plurality of front side ribs 65 erected toward the vehicle front side from the second parallel rib 62 and the second intermediate rib 66. The strength of the cross section is enhanced by forming the second edge surface portion 58 at the tip of the lattice rib.

In the above-described embodiment, the fracture starting point 74 is a groove with a V-shaped cross section, but may be a groove with a concave cross section as shown in FIG. 13 . Also in this modified example, the fracture starting point 74 is simply provided on the arm body 42 .

Further, the fracture starting portion 74 is formed on the surface of the third parallel rib 72 or the first edge surface portion 56 at a position where the vehicle rear side wall surface of the third parallel rib 72 and the outer side wall surface of the first edge surface portion 56 intersect. A portion of the side portion may have a constricted shape that curves toward the front side of the vehicle (see FIG. 5), or a portion of both side portions of the third parallel rib 72 or the first edge surface portion 56 in the vehicle width direction may be the pedal arm 40 . It may have a constricted shape that curves inwardly. In either case, it is possible to cause stress concentrations due to a reduction in the section modulus of the pedal arm 40 .

10, 110 Vehicle Operation Pedal Device 42 Arm Main Body 44 Tread Portion 46 First Cylindrical Portion 54 Third Cylindrical Portion 74 Fracture Starting Portion 82 Inclined Rib 86 Fracture Guiding Portion 92 Operating Rod FP Pedal Force L Fracture Line

Claims (7)

a resin arm body;
a tread portion that is provided at one end of the arm body and that is stepped forward of the vehicle when the stepping operation is performed;
a boss provided at the other end of the arm body and serving as a rotation center of the arm body when the stepping operation is performed;
a connecting portion provided between the tread portion of the arm body and the boss, the connecting portion rotatably connecting the arm body to an input portion of a vehicle control mechanism;
A starting point disposed near the tread portion between the tread portion and the connecting portion of the arm body, and at which the arm body breaks when a pedaling force exceeding a rating acts on the tread portion during the stepping operation. A fracture starting point that is
a breakage guide part provided on the breakage line of the arm body for guiding the breakage of the arm body along the breakage line;
The vehicular operation pedal device, wherein the breaking line is a line passing through the front side of the vehicle relative to the connecting portion and the boss. 2. The operation pedal device for a vehicle according to claim 1, wherein the fracture starting point is formed on the vehicle rear side of the arm body. 3. The operation pedal device for a vehicle according to claim 2, wherein the fracture starting point has a constricted shape in which the vehicle rear side of the arm main body is curved toward the vehicle front side. 3. The operation pedal device for a vehicle according to claim 1, wherein the fracture starting portion is a groove having a V-shaped cross section. 3. The operation pedal device for a vehicle according to claim 1, wherein the fracture starting portion is a groove having a concave cross section. 6. The operation pedal device for a vehicle according to claim 1, wherein the breakage guide portion is a groove having a V-shaped cross section. 7. The arm body according to any one of claims 1 to 6, further comprising a rib that is erected on the arm body, separated from the breaking line, and connected to the connecting portion to reinforce the connecting portion. 1. The operation pedal device for a vehicle according to 1.

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