WO2018003039A1

WO2018003039A1 - Operation pedal

Info

Publication number: WO2018003039A1
Application number: PCT/JP2016/069325
Authority: WO
Inventors: 覚増田
Original assignee: 大塚工機株式会社
Priority date: 2016-06-29
Filing date: 2016-06-29
Publication date: 2018-01-04
Also published as: JP6650034B2; JPWO2018003039A1

Abstract

Disclosed is an operation pedal that can be made lightweight while ensuring necessary strength, can also be reduced in cost, and can also be improved in molding quality. This operation pedal 10 is rotatably supported by a vehicle-body-side member in a vehicle, and comprises an arm part 13 that extends in a length direction from a base end part 11 serving as a center of rotation to a tip end part 12 to which an operation force is applied. The arm part 13 is molded from a resin, and has a metal wire 30 arranged therein and extending in the length direction.

Description

Operation pedal

The present invention relates to an operation pedal which is rotatably supported by a vehicle body side member in a vehicle and used for various operations.

Conventionally, as an operation pedal used for a vehicle, for example, there is a brake pedal of a brake device. A brake device is known in which a base end of a brake pedal is rotatably supported on a vehicle body side member, and an operation force is applied by stepping on the brake pedal with a foot. For example, see Patent Document 1.

Such a brake pedal required high strength to receive the operating force directly. Therefore, the brake pedal is generally made of a metal such as a cast product. Recently, a brake pedal molded with resin is also known due to the demand for lighter vehicles. However, in order to maintain the required strength, it was necessary to mold with a metal member such as an iron plate inside. .

JP 2006-91957 A

However, even the resin brake pedal described above has been desired to be devised for further weight reduction while maintaining sufficient strength.
In addition, in order to put a metal member inside the resin, insert molding is generally performed, but when it has a part that spreads over the surface, such as an iron plate, heating unevenness is likely to occur at the time of residual heat of the metal part required during molding, There is a possibility that molding quality may be impaired due to sink marks or cracks after cooling the molded product.

The present invention has been made by paying attention to the improvement points of the conventional technology as described above, and can achieve weight reduction while ensuring the necessary strength, can also reduce the cost, and the molding quality is also improved. The object is to provide an operating pedal that can be raised.

The gist of the present invention for achieving the object described above resides in the inventions of the following items.
[1] In an operation pedal that is rotatably supported by a vehicle body side member in a vehicle,
An arm portion extending in the longitudinal direction from the base end portion serving as the rotation center to the distal end portion for applying the operation force;
The operation pedal according to claim 1, wherein the arm portion is formed of resin, and a wire extending in a longitudinal direction is disposed inside the arm portion.

[2] The operation pedal according to [1], wherein the arm portion includes a trunk in which the wire is inserted, and a reinforcing rib provided along a longitudinal direction of the trunk. .

[3] The reinforcing ribs include outer wall reinforcing ribs that are continuous with each other so as to surround the backbone in the longitudinal direction, and inner reinforcing ribs that are continuous between the inner surfaces of the outer wall reinforcing ribs or the outer periphery of the backbone. The operating pedal according to [2], which is characterized in that

[4] The operation pedal according to [1], [2], or [3], wherein the arm portion is insert-molded with resin from the metal.

[5] The wire is spring steel, and the spring steel is bent in a direction opposite to a direction in which bending stress is applied to the arm portion when an operation force is applied to the tip portion. The operation pedal according to [1], [2], [3], or [4], which is disposed inside the unit.

[6] The above-mentioned [1], [2], [3], [4] or [5], wherein the wire is subjected to surface processing for increasing frictional resistance. Operation pedal.

[7] The above-mentioned [1], [2], [3], [4], which is used in a power transmission device, and is provided with a pad for applying an operating force by stepping on the tip with a foot. The operation pedal according to [5] or [6].

Next, the operation will be described.
The operation pedal (10) according to [1] includes an arm portion (13) extending in the longitudinal direction from a base end portion (11) serving as a rotation center to a distal end portion (12) to which an operation force is applied. The arm portion (13) is formed of resin, and a wire (30) extending in the longitudinal direction is disposed inside the arm portion (13).

According to the structure of such an arm part (13), it can reduce in weight compared with metal products, such as a casting, by shape | molding with resin, and it shape | molds in various shapes with a high freedom degree of shaping | molding. Is possible. Further, the necessary strength in the arm portion (13) can be sufficiently ensured by the internal wire (30) of the resin. Here, the wire (30) has a smaller capacity than a metal member such as an iron plate and can suppress an increase in weight as much as possible.

Also, in the case of insert molding in which a metal part is placed inside the resin, it is necessary to heat the metal part. Here, if the metal part is spread like a steel plate or the like, heating unevenness is likely to occur during the remaining heat, and sink marks and cracks are likely to occur after the molded product is cooled. On the other hand, if the metal part is a wire (30), it is easy to preheat the entire part uniformly, and the formability can be improved and the forming quality can be improved.

According to the operation pedal (10) described in [2] above, the arm portion (13) includes a trunk (130) in which a wire (30) is inserted, and a longitudinal direction of the trunk (130). And a reinforcing rib (131) provided. According to such an arm part (13), intensity | strength can be raised with a simple structure.

Specifically, for example, as described in [3] above, the reinforcing rib (131) includes outer wall reinforcing ribs (132a to 132a) that are continuous with each other so as to surround the trunk (130) of the arm portion (13) in the longitudinal direction. 132c) and inner reinforcing ribs (133) continuous between the inner surfaces of the outer wall reinforcing ribs (132a to 132c) or the outer periphery of the trunk (130).

According to such a configuration of the arm portion (13), sufficient strength required for the operation pedal (10) can be ensured. Also, the resin material can be reduced by the gap between the inner surface side of each outer wall reinforcing rib (132a to 132c) and the inner reinforcing rib (133), the weight can be reduced, and the material cost can also be reduced. .

As described in [4] above, the arm portion (13) may be insert-molded with resin from the wire (30). If a mold and a wire (30) are prepared in advance, mass production can be performed easily and quickly by insert molding. Of course, not only the arm portion (13) but also the entire operation pedal (10) including the arm portion (13) may be integrally formed of resin so that the wire (30) is disposed inside.

According to the operation pedal (10) described in [5], the bar (30) is spring steel, and the spring steel is subjected to bending stress in the arm portion (13) when the operation pedal (10) is operated. It is arranged inside the arm part (13) in a state bent in the direction opposite to the direction. As a result, even if bending stress is applied to the arm portion (13), it becomes more difficult to deform due to the internal stress of the spring steel, and even the spring steel having the same section modulus further increases the rigidity of the arm portion (13). be able to.

According to the operation pedal (10) described in [6] above, the metal bar (30) is subjected to surface processing for increasing the frictional resistance. Thereby, the adhesiveness of the resin around the wire (30) is increased, and the force resisting the pulling force can be increased.

The above operating pedal (10) can be used for a power transmission device (clutch) as described in [7] above, for example. When the operation pedal (10) is applied to the clutch pedal of the power transmission device, the tip (12) of the operation pedal (10) is provided with a pad (14) for stepping on with a foot to apply an operation force. .

According to the operation pedal according to the present invention, the arm portion is formed of resin, and the wire extending in the longitudinal direction is disposed therein. Therefore, the weight can be reduced while ensuring the necessary strength, and the cost can be reduced. And the molding quality can be improved.

It is the perspective view which looked at the operation pedal which concerns on embodiment of this invention from back. It is the perspective view which looked at the operation pedal which concerns on embodiment of this invention from the front. It is the perspective view which looked at the operation pedal which concerns on embodiment of this invention from the downward direction. It is a side view which shows the operation pedal which concerns on embodiment of this invention. It is a front view which shows the operation pedal which concerns on embodiment of this invention. It is a top view which shows the operation pedal which concerns on embodiment of this invention. It is the side view which shows the operation pedal which concerns on embodiment of this invention, and a transverse cross section in each part. It is the top view, side view, and front view which show the metal of the operation pedal which concerns on embodiment of this invention.

Hereinafter, an embodiment representing the present invention will be described with reference to the drawings.
1 to 8 show an embodiment of the present invention.
The operation pedal 10 according to the present embodiment is rotatably supported by a vehicle body side member in a vehicle, and extends in a longitudinal direction from a base end portion 11 serving as a rotation center to a distal end portion 12 to which an operation force is applied. An arm portion 13 is provided. Hereinafter, an example in which the operation pedal 10 is applied to a clutch pedal of a power transmission device (clutch) will be described.

The operation pedal 10 which is a clutch pedal is operated by a driver (operator) with his / her foot, and is disposed in front of the driver's seat in the passenger compartment. The operation pedal 10 is supported by a base bracket, which is a vehicle body side member (not shown), so that the base end portion 11 can turn. The distal end portion 12 of the operation pedal 10 is located below the proximal end portion 11. On the other hand, a foot pad 14 is provided at the distal end portion 12 of the operation pedal 10. When the pad 14 is stepped on with a foot and an operation force is applied, the operation pedal 10 rotates forward about the base end portion 11 so that transmission of the engine rotation force to the transmission (transmission) is cut off. Has been.

The operation pedal 10 is supported with respect to the base bracket so as to be swingable in the front-rear direction via a rotating shaft (not shown) extending in the vehicle width direction. The base end portion 11 of the operation pedal 10 is provided with a bearing portion 15 for fitting the rotating shaft integrally. On the other hand, the base bracket includes side walls opposed to each other, and the bearing portion 15 is supported between the side walls so as to be rotatable in a both-end supported state via a rotation shaft.

The operating pedal 10 is always urged to rotate backward by a return spring (not shown). On the front side of the base end portion 11, a latching hook 16 that hooks one end of the return spring is integrally projected. As a result, when the operation pedal 10 is fully depressed and the foot 14 is released, the operation pedal 10 is set to return to the rear initial position by the biasing force of the return spring.

As shown in FIG. 1, the operation pedal 10 is integrally formed of resin as a whole. The arm 13 which is the main part of the operation pedal 10 is provided with a wire 30 extending in the longitudinal direction inside a trunk 130 (see FIG. 7), and a reinforcing rib 131 is provided along the longitudinal direction of the trunk 130. Yes.

The operation pedal 10 according to the present embodiment has a long shape in which an operation force is applied to the pad 14 at a position separated from the bearing portion 15 serving as the rotation center by the length of the arm portion 13. A relatively large torque load is applied. In order to maintain the strength that can withstand such a torque load and realize weight reduction, the entire operation pedal 10 including the arm portion 13 is configured as shown in FIGS. 7 and 1 to 6.

As shown in FIG. 7 and FIGS. 1 to 6, the trunk 130 of the arm portion 13 has a shape extending in the longitudinal direction while its axial center is bent or curved in the middle. 30 is inserted. Thus, the arm part 13 (base 130) of the operation pedal 10 and the internal wire 30 are not limited to the shape in which the axial center extends linearly. The specific length and outer diameter of the trunk 130 and the outer diameter and material of the wire 30 are design matters that can be determined as appropriate. The specific shapes and sizes of the base end portion 11 and the tip end portion 12 connected to both ends of the arm portion 13 are also design matters that can be appropriately determined.

The specific arrangement and shape of the reinforcing rib 131 are appropriately determined according to the necessary strength against the torque load described above, but it is preferable to design the reinforcing rib 131 in a shape that does not include an undercut so as to facilitate die cutting. The reinforcing rib 131 according to the present embodiment includes outer wall reinforcing ribs 132a to 132c that are continuous with each other so as to surround the trunk 130 in the longitudinal direction, and an inner side that extends between the inner surfaces of the outer wall reinforcing ribs 132a to 132c or the outer periphery of the trunk 130 A reinforcing rib 133.

Specifically, the outer wall reinforcing ribs 132a to 132c are integrally connected to the outer periphery of the trunk 130 and extend in a narrow shape to form a front wall, and the outer wall reinforcing ribs 132a extend in the longitudinal direction of the outer wall reinforcing rib 132a. It consists of outer

wall reinforcing ribs

132b and 132c that are connected at substantially right angles to both side edges of the reinforcing rib 132a and form both side walls facing each other in parallel. On the other hand, a large number of inner reinforcing ribs 133 are arranged so as to cross the inner surfaces of the outer wall reinforcing ribs 132a to 132c substantially at right angles or obliquely with the outer periphery of the backbone 130 being partly connected. Has been.

As shown in FIG. 7, the inner reinforcing ribs 133 are arranged in a zigzag manner between the outer

wall reinforcing ribs

132b and 132c on both sides. By such an inner reinforcing rib 133, the back side opening between the outer

wall reinforcing ribs

132b and 132c on both sides is a concave portion that is divided so that triangles are arranged. The thicknesses of the individual inner reinforcing ribs 133 are substantially the same, and the upper end edge (height) of the inner reinforcing rib 133 is continuous with the side edges of the outer

wall reinforcing ribs

132b and 132c on both sides. . That is, the inner reinforcing rib 133 is provided in a state of being fitted inside the outer

wall reinforcing ribs

132b and 132c on both sides.

The entire operation pedal 10 including the outer wall reinforcing ribs 132a to 132c and the inner reinforcing rib 133 as the reinforcing rib 131 has a wire 30 placed in advance in the mold, and resin is injected around the wire 30 to It is formed by insert molding in which the gold 30 is integrated into the main body 130.

The specific arrangement of the inner reinforcing rib 133 is appropriately set based on the calculation of the actual load applied to each part, the required strength, etc., according to the size and application of the entire operation pedal 10. Note that at least a part of the reinforcing rib 131 may be provided separately from the backbone 130 of the arm 13 and may be configured to be joined to the outer periphery of the backbone 130 later by heating or solvent bonding.

Next, the wire 30 inserted in the trunk 130 will be described with reference to FIG. 8A is a plan view of the wire 30, FIG. 8B is a side view, and FIG. 8C is a front view.
As illustrated, the wire 30 extends in the longitudinal direction while being bent or curved. These drawings show a shape when the core 130 is actually inserted.

The wire 30 is subjected to surface processing for roughening the surface in order to increase frictional resistance and make it difficult to slip. For example, irregularities are formed on the surface of the wire 30. The average roughness Ra of the surface is, for example, in the range of 0.15 to 35 μm. As a result, the friction coefficient of the surface increases and the resin enters between the irregularities, so that the frictional resistance between the wire 30 and the inner surface of the trunk 130 in contact with the wire 30 increases.

Since the wire 30 does not have to slide within the core 130 after molding, the surface processing may be provided with protrusions on the surface in addition to the above. Moreover, you may form repeatedly a ring-shaped projection part in an axial direction so that it may go around an outer peripheral surface.

Note that the Ra value of the surface of the wire 30 is not limited to the above range. Further, the wire 30 is not limited to a circular cross section, and may be an elliptical shape or a polygonal shape. Further, the specific length and outer diameter of the trunk 130 and the outer diameter and material of the wire 30 are not particularly limited.

Next, the operation of the operation pedal 10 according to the present embodiment will be described.
As shown in FIG. 7, the operation pedal 10 includes an arm portion 13 extending in the longitudinal direction from a base end portion 11 serving as a rotation center to a distal end portion 12 to which an operation force is applied. In the arm portion 13, the wire 30 is inserted into the trunk 130 along the longitudinal direction of the arm portion 13 in order to ensure the strength required for the operation pedal 10. The wire 30 plays a role as a reinforcing material.

The arm portion 13 is formed by insert molding as described above, but it is necessary to preheat to 50 to 60 degrees when putting metal. In that case, if the metal is an iron plate, uneven heating will occur. On the other hand, when the metal is made of metal, it can be preheated uniformly. Thereby, since molding conditions improve, it can prevent that a problem arises in the shape of a molded product, or a sink or a crack arises.

As shown in FIG. 7, in the operation pedal 10 according to the present embodiment, the wire 30 is inserted into the inside of a trunk 130 formed substantially at the center of the outer wall reinforcing rib 132 a over the longitudinal direction of the arm portion 13. ing. Since the arm portion 13 is not a simple shape but is bent or curved, when reinforcing it by inserting a plate-like metal, the degree of reinforcement will be uneven depending on the difficulty and location of the placement and insert molding. Is a problem. However, the wire 30 can be easily insert-molded so that the wire 30 is disposed at a desired position. Therefore, the arm portion 13 can be effectively reinforced by the wire 30.

Further, the arm portion 13 according to the present embodiment is composed of a trunk 130 having a wire 30 inserted therein, and reinforcing ribs 131 provided along the longitudinal direction of the trunk 130. The entire operation pedal 10 including the arm portion 13 is integrally formed of resin. As a result, the operation pedal 10 can be easily reduced in weight as compared with the case of molding with a metal material, and can be molded into various shapes with a high degree of freedom in molding. Further, the number of parts of the operation pedal 10 is reduced, and if a mold is prepared in advance, mass production can be performed easily and quickly by integral molding such as injection molding or blow molding. Only the arm portion 13 may be integrally formed, and the proximal end portion 11 and the distal end portion 12 may be combined with the arm portion 13 later.

In particular, the arm portion 13 can ensure the strength required for the operation pedal 10 even if it is made of resin due to the structure in which the core 130 and the wire 30 are combined. Furthermore, since the material is reduced by the gaps between the reinforcing ribs 131, the weight can be reduced, and the material cost can be reduced.

As shown in FIG. 7, the reinforcing rib 131 in the arm portion 13 is a pair extending along the outer circumference of the trunk 130 of the arm portion 13 so as to narrow in the longitudinal direction while facing the axial centers of the arm portions 13. The outer

wall reinforcing ribs

132a and 132b, and the inner wall reinforcing ribs 133 continuous between the mutually facing inner surfaces of the outer

wall reinforcing ribs

132a and 132b or the outer periphery of the trunk 130 are formed.

According to the reinforcing rib 131 having such a configuration, high strength can be maintained with a simple configuration. The specific length and thickness of each of the outer wall reinforcing ribs 132a to 132c, and the specific arrangement of the numerous inner reinforcing ribs 133, the overall size and application of the operation pedal 10, the actual load applied to each part, and the necessary It is set as appropriate based on the calculation of strength and the like.

Further, the entire operation pedal 10 including the reinforcing rib 131 is preferably designed to have a shape that does not include an undercut in the mold release direction on both the left and right sides when integrally molded with resin. Thereby, it becomes possible to shape | mold more easily.

As a modification of the operation pedal 10 according to the above-described embodiment, the arm portion 13 is a state in which the wire 30 is bent in a direction opposite to the direction in which the bending stress is applied to the arm portion 13 when the operation pedal 10 is operated. Therefore, it is arranged inside the backbone 130. That is, the arm portion 13 is molded so that a certain amount of tension is applied to the wire 30 inside the trunk 130 after molding. *

For this purpose, it is necessary to keep the wire 30 bent in the core 130 until the molten resin being molded cools and hardens. For this purpose, a mold (not shown) is brought into contact with the bent wire 30 in order to keep the wire 30 bent at a predetermined position, so that the wire 30 is deformed in a direction to cancel the bending. A wire holding part (not shown) provided in place is used to prevent this.

When the pad 14 at the distal end portion 12 is stepped on by the driver (operator), the operation pedal 10 applied to the clutch pedal of the transmission rotates forward about the bearing portion 15 of the base end portion 11 as a rotation center. Then, when the operation pedal 10 is operated, a portion where stress is particularly concentrated appears particularly in a section from the base end portion 11 to the lower end of the arm portion 13. The portion differs depending on the shape of the arm portion 13.

In such a portion, the necessary strength is sufficiently ensured by forming the arm portion 13 so that the wire 30 inserted in the trunk 130 is bent as described above. In addition, the thickness of the outer wall reinforcing ribs 132a to 132c may be increased or the density of the inner reinforcing ribs 133 may be increased.

The embodiments of the present invention have been described above with reference to the drawings. However, the specific configuration is not limited to the above-described embodiments, and the present invention can be changed or added without departing from the scope of the present invention. Included in the invention. For example, the operation pedal 10 is not necessarily limited to a clutch pedal of a power transmission device (clutch), but may be applied to a brake pedal of a brake device or other pedals used for various operations such as an accelerator pedal and a reclining pedal. Can do.

The operation pedal according to the present invention is not necessarily limited to a clutch pedal of a power transmission device (clutch), and can be widely applied as an operation pedal used for various operations in a vehicle.

DESCRIPTION OF SYMBOLS 10 ... Operation pedal 11 ... Base end part 12 ... Tip part 13 ... Arm part 14 ... Pad 15 ... Bearing part 16 ... Latch hook 18 ... Connection part 19 ... Connection part 30 ... Wire 130 ... Base 131 ... Reinforcement rib 132a- c ... Outer wall reinforcing rib 133 ... Inside reinforcing rib

Claims

In the operation pedal (10) rotatably supported by the vehicle body side member in the vehicle,
An arm portion (13) extending in the longitudinal direction from a base end portion (11) serving as a rotation center to a distal end portion (12) for applying an operating force;
The said arm part (13) is shape | molded by resin, The wire (30) extended in a longitudinal direction is distribute | arranged to the inside, The operation pedal (10) characterized by the above-mentioned.
The arm portion (13) includes a trunk (130) in which the wire (30) is inserted, and reinforcing ribs (131) provided along the longitudinal direction of the trunk (130). The operating pedal (10) according to claim 1, characterized in that it is characterized in that
The reinforcing rib (131) is formed between the outer wall reinforcing ribs (132a to 132c) connected to each other so as to surround the backbone (130) in the longitudinal direction and the inner surface of each outer wall reinforcing rib (132a to 132c) or the backbone (130). The operation pedal (10) according to claim 2, characterized in that the operation pedal (10) comprises an inner reinforcing rib (133) continuous over the outer periphery of the control pedal.
The operation pedal (10) according to claim 1, 2, or 3, wherein the arm portion (13) is insert-molded with resin from the wire (30).
The wire (30) is spring steel, and the spring steel is bent in a direction opposite to a direction in which bending stress is applied to the arm portion (13) when an operation force is applied to the tip end portion (12). The operating pedal (10) according to claim 1, 2, 3 or 4, wherein the operating pedal (10) is arranged inside the arm portion (13) in a state where the operation pedal is in a closed state.
The operation pedal (10) according to claim 1, 2, 3, 4 or 5, wherein the wire (30) is subjected to surface processing for increasing frictional resistance.
7. A pad (14) used for a power transmission device, wherein a pad (14) is provided to apply an operating force by stepping on the tip (12) with a foot. The operating pedal (10) as described.