WO2021029384A1

WO2021029384A1 - Suspended pedal and pedal hanger

Info

Publication number: WO2021029384A1
Application number: PCT/JP2020/030444
Authority: WO
Inventors: 富雄柿見
Original assignee: 富雄柿見
Priority date: 2019-08-09
Filing date: 2020-08-07
Publication date: 2021-02-18
Also published as: JP6639726B1; JP2021028200A

Abstract

[Problem] To provide a pedal and a pedal hanger which can be depressed with a softer feeling than in the past. [Solution] A pedal 20 having a tread surface 22A to which a tread force is applied is configured as a suspended type by being attached to a lower end part 40B of a pedal hanger 40 rotatably suspended from an end part 30B of a crank 30. According to a suspended pedal 10 configured in this manner, the pedal hanger 40 pivots, and thus when the pedal 20 is depressed, a pulling force acts in a direction which attempts to rotate the crank 30. Additionally, even if some variation arises in the direction of the force with which the pedal 20 is depressed, the pedal hanger 40 can pivot appropriately to cause the force to act in a direction that pulls the crank.

Description

Suspended pedals and pedal hangers

The present invention relates to a pedal and a pedal hanger attached to a crank of a bicycle or the like.

The pedal, which is one of the components of a bicycle, is generally configured such that a pedal body having a tread surface to which the pedaling force of an occupant is applied is pivotally supported on a pedal shaft via a bearing (Non-Patent Document 1). Further, in recent years, a foldable pedal (for example, Patent Document 1) in which the pedal body can be folded so that the tread surface is vertical, and a binding pedal (for example, a binding pedal) in which the sole is fixed to the pedal body via a fastener called a cleat. For example, various types of pedals such as Patent Document 2) are widely used.

Jikkenhei 5-42087 Japanese Unexamined Patent Publication No. 2014-213851

An object of the present invention is to provide a pedal and a pedal hanger that can be stepped on with a softer feeling than before.

In order to achieve the above object, the pedal according to the present invention includes a pedal having a tread surface to which a pedaling force is applied, and a pedal hanger that is rotatably suspended at the end of a crank and the pedal is attached to a lower portion. It is characterized by being configured in a hanging manner.

The pedal hanger has a shaft member screwed to the crank, and the shaft member is pivotally supported via a bearing.

In addition, the pedal hanger is characterized by having a screw hole.

Further, the pedal includes a pedal shaft that can be screwed to the crank, the crank is provided with a pedal shaft hole that can be screwed to the pedal shaft, and the shaft member is screwed to the pedal shaft hole. It is characterized in that the pedal shaft is screwed into the screw hole.

Further, the pedal hanger according to the present invention is characterized in that a pedal having a tread surface to which a pedaling force is applied is attached to the lower part by being rotatably suspended from the end of the crank.

According to the hanging pedal and pedal hanger of the present invention having the above configuration, the pedal hanger swings, so that when the pedal is depressed, a pulling force acts in the direction in which the crank is to be rotated. There is. Further, even if there is some variation in the direction of the pedal depressing force, the pedal hanger can swing appropriately and act in the direction of pulling the crank. As a result, the pedal can be depressed with a softer feeling than before.

It is a perspective view which shows the hanging type pedal which concerns on embodiment. It is an exploded perspective view of the said pedal including the pedal hanger which concerns on embodiment. It is the schematic for demonstrating a series of movements of the said hanging type pedal. It is the schematic for demonstrating a series of movements of the said hanging type pedal. It is the schematic for demonstrating a series of movements of the said hanging type pedal. It is the schematic for demonstrating a series of movements of the said hanging type pedal. It is a comparison diagram of the rotation trajectory of a crank and the rotation trajectory of a pedal. It is (a) perspective view and (b) side view which shows the other embodiment of a pedal hanger.

Hereinafter, embodiments of the hanging pedal and the pedal hanger according to the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the hanging pedal 10 according to the embodiment includes a known bicycle pedal 20 that is widely used and a bicycle crank 30 that is also known according to the embodiment. They are connected to each other via a hanger 40.

The bicycle pedal 20 is a general-purpose part having a structure classified into a shape called an integrated type. The bicycle pedal 20 includes a pedal body 22 having a tread surface 22A to which the pedaling force of an occupant is applied. The pedal body 22 has internal bearing structures (not shown) on the inside and outside thereof, and is rotatably supported around the axis C1 of the pedal shaft 24. A male screw portion 24M (FIG. 2) is formed on the outer peripheral surface of the end portion of the pedal shaft 24 protruding from the inner portion of the pedal body 22.

The crank 30 is a basic component of a bicycle in which the base end portion 30A is fixed to a crankshaft (not shown) and rotates integrally with the crankshaft. A pedal shaft hole 32 (FIG. 2) is provided at the end portion 30B on the tip end side of the crank 30. A female screw portion 32F is formed on the inner peripheral surface of the pedal shaft hole 32. The female screw portion 32F of the pedal shaft hole 32 is configured to be screwable with the male screw portion 24M of the pedal shaft 24.

The pedal hanger 40 has a shaft member 42 having a male screw portion 42M (FIG. 2) partially formed on the outer peripheral surface. A bearing 44 is built in the upper end 40A of the pedal hanger 40. The shaft member 42 is pivotally supported by the upper end 40A of the pedal hanger 40 via the bearing 44. A screw hole 46 is provided at the lower end 40B of the pedal hanger 40. A female screw portion 46F is formed on the inner peripheral surface of the screw hole 46.

The male screw portion 24M of the pedal shaft 24 is screwed into the female screw portion 46 of the screw hole 46. As a result, the pedal body 22 of the bicycle pedal 20 is attached to the lower end 40B of the pedal hanger 40. On the other hand, the male screw portion 42M of the shaft member 42 is screwed with the female screw portion 32F of the pedal shaft hole 32. As a result, the upper end 40A of the pedal hanger 40 is attached to the end 30B on the tip end side of the crank 30 in a state of being rotatably suspended around the axis C2 of the shaft member 42. That is, in the present embodiment, the bicycle pedal 20 including the pedal body 22 is attached by the pedal hanger 40 in a state of being suspended from the end portion 30B on the tip end side of the crank 30.

In the hanging pedal 10 having the above configuration, the position of the axis C1 of the pedal shaft 24 is shifted downward from the rotation axis C2 of the pedal hanger 40 (the axis C2 of the shaft member 42). Along with this, the position of the tread surface 22A of the pedal body 22 is also configured to be lower than the central axis (axis center C2 of the shaft member 42) of the pedal shaft hole 32 of the crank 30. The distance D (FIG. 1) between the axis C1 of the pedal shaft 24 and the axis C2 of the shaft member 42 is not particularly limited, but is assumed to be about 30 mm to 50 mm. The distance between the axes D is based on the fact that most commercially available bicycle cranks are designed in the range of 150 mm to 170 mm, but the suspension pedal 10 has a length other than this range. Of course, it may be applied to cranks, for example, cranks for infant bicycles and cranks for professional bicycles.

Subsequently, a series of movements of the hanging pedal 10 of the present embodiment will be described with reference to FIGS. 3 to 6 as appropriate. For convenience of explanation, the crank 30 shown in each figure is assumed to rotate in the clockwise direction (direction of the arc arrow shown in FIGS. 4 to 6), and when specifying the rotation position and the rotation section of the crank 30, " It will be expressed by comparing it to "time". For example, the crank 30 shown in FIG. 3 is at the "0 o'clock position".

First, the movement when the crank 30 is in the "0 o'clock position" will be described with reference to FIG. This "0 o'clock position" is normally the top dead center, but with the hanging pedal 10, when the pedal 20 is pushed forward, the pedal hanger 40 is in a vertical position as shown in the partially enlarged view. Swing forward from. At this time, a force F that pulls the crank 30 in the direction in which the crank 30 is to be rotated clockwise (here, the horizontal direction) acts on the connecting portion of the crank 30 with the pedal hanger 40. As a result, the crank 30 passes through the "0 o'clock position" while being pulled by the pedal hanger 40. That is, in the hanging pedal 10, the conventional "top dead center" is substantially eliminated.

When the pedal 20 is further depressed from there, as shown in FIG. 4, the crank 30 that has passed the "0 o'clock position" is always pulled by the pedal hanger 40 and rotates to the "3 o'clock position". In the rotation section up to this point, the crank 30 draws a rotation trajectory of the upper right 1/4 arc of a perfect circle indicated by a two-point chain line centered on the rotation axis of the crankshaft. On the other hand, the pedal 20 draws a rotation trajectory in the upper right 1/4 elliptical arc shape (thick broken line) of an ellipse whose perfect circle is flattened in the vertical direction.

When the pedal 20 is continuously depressed, as shown in FIG. 5, the crank 30 is pulled by the pedal hanger 40 as before, and from the "3 o'clock position" to the bottom dead center "6 o'clock position". Rotate to. In this rotation section, the crank 30 draws a rotation trajectory of a lower right 1/4 arc of a perfect circle indicated by the above-mentioned two-dot chain line. On the other hand, the pedal 20 has a 1/4 arc-shaped (thick broken line) rotating trajectory that passes outside the perfect circle that is the rotating trajectory of the crank 30 by a distance slightly smaller than the above-mentioned inter-axis distance D. Will be drawn.

The rotation section from the "6 o'clock position" to the "0 o'clock position", the crank 30 is rotated by the rotational force of the cranks (not shown) on the opposite sides. Therefore, in this rotation section, the crank 30 rotates while the pedal hanger 40 maintains the vertical posture. Then, in this rotation section, as shown in FIG. 6, the crank 30 draws a rotation trajectory of the left half arc of a perfect circle indicated by the above-mentioned two-dot chain line. On the other hand, the pedal 20 rotates in a left semicircular shape (thick broken line) in which the rotation trajectory of the left semicircle of the crank 30 is shifted downward by the distance corresponding to the above-mentioned inter-axis distance D. It will draw a trajectory.

Then, when the crank 30 returns to the "0 o'clock position", the hanging pedal 10 will repeat the above-mentioned series of movements again.

FIG. 7 shows a comparison diagram of the rotation trajectories of the crank 30 and the pedal 20 in the series of movements of the hanging pedal 10 described above. As described above, the crank 30 draws a rotation trajectory on the circumference of the perfect circle indicated by the two-point chain line, but in the present embodiment, the occupant operates the pedal 20 with his / her foot on the right side of this perfect circle. It is a rotation section of a semicircle. Then, in this section, when the pedal 20 is depressed, a pulling force for rotating the crank 30 in the clockwise direction always acts.

In addition, in the rotation section PS (section of the arc arrow shown in FIG. 7) where the pedaling force applied to the pedal 20 is particularly large, the pedal 20 passes outside the circumference which is the rotation trajectory of the crank 30. That is, in this section PS, the distance from the rotation axis of the crank 30 to the pedal 20 to which the pedaling force is applied is substantially extended. Therefore, the crank 30 can be rotated efficiently.

Further, even if there is some variation in the direction in which the pedal 20 is stepped on (the direction of the pedaling force vector), the pedal hanger 40 can swing appropriately and act in the direction in which the crank 30 is pulled. This makes it less likely that events such as depressing the pedal and losing balance will occur in conventional pedals. This is an effect peculiar to the hanging pedal 10 that depresses the pedal 20 and rotates the crank 30 by "pulling force", and at the same time, it is between the conventional pedal that depresses the pedal and rotates the crank by "pushing force". It is also one of the big differences.

Moreover, although the rotation trajectory of the pedal 20 deviates downward by the above-mentioned inter-axis distance D from the rotation trajectory of the crank 30, the diameter of the rotation trajectory in the vertical direction is substantially the same. Moreover, the series of movements described above is performed while the pedal 20 maintains the horizontal posture. Therefore, the occupant can step on the pedal 20 with almost no discomfort as compared with the conventional pedal. Not only that, the lower the rotation trajectory of the pedal 20, the easier it is to bend and stretch the legs.

According to the hanging pedal 10 of the present embodiment, a series of movements as described above is realized by attaching the pedal 20 in a state of being suspended from the end portion 30B of the crank 30 by the pedal hanger 40 having the above configuration. Will be done. As a result, the pedal 20 can be depressed with a softer feeling than before.

Although the hanging pedal and the pedal hanger according to the present invention have been described above based on the embodiment, the present invention is not limited to the above-described embodiment, and the present invention is, for example, implemented in a modified form as follows. It doesn't matter.

<Other embodiments>
In the above embodiment, the pedal hanger 40 has been illustrated as an integral part, but may be a combination of a plurality of parts. .. Specifically, it may be carried out in the form of the pedal hanger 50 shown in FIG.

The pedal hanger 50 includes a shaft member 52 having a male screw portion 52M formed on the outer peripheral surface thereof. The shaft member 52 is rotatably supported by the bearing 54. The bearing 54 is sandwiched between the

flanged fasteners

56A and 56B, which are split in half. The left and right flange portions 56AL, 56AR, 56BL, 56BR of each of these sets of

fasteners

56A and 56B have through holes 60AL and 60AR (the through holes of the flange portions 56BL and 56BR are not shown) at corresponding positions. It has been opened. Then, the

fasteners

56A and 56B are fastened to each other with fixing brackets (for example, bolts and nuts) (not shown) inserted through the through holes corresponding to the upper and lower sides, and the bearing 54 is sandwiched. An arm 62 is provided on the fastener 56B arranged on the lower side. The arm 62 is provided with a screw hole 64 in which a female screw portion 64F is formed on the inner peripheral surface.

The above-mentioned

halved fasteners

56A and 56B are known parts that are also used for commercially available unicycles, and therefore have excellent versatility. Further, if a plurality of types of parts having different lengths of the arm 62 are prepared, it is easy to adjust and select the distance between the shaft centers between the shaft member 52 and the pedal shaft.

<Modification example>
(1) In the above embodiment, since the commercially available bicycle or bicycle parts are used as they are, the pedal hanger is composed of parts separate from the pedal, but the pedal hanger and the pedal are integrated parts. Of course, it doesn't matter.

(2) In the above embodiment, a pedal having a rotatable pedal body is attached to the pedal hanger, but the pedal body does not necessarily have to be rotatable. For example, a thin plate-shaped pedal member may be fixed to the lower part of the pedal hanger. The point is that a pedal having a tread on the tip of the crank should be suspended.

(3) Needless to say, each of the above embodiments and modifications can be applied to either the left or right crank. Further, each of the above-described embodiments and modifications may be attached to either one of the left and right cranks, or may be attached to both the left and right cranks.

The present invention can also be carried out in a mode in which various improvements, modifications, or modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Further, within the range in which the same action or effect is produced, any of the invention-specific matters may be replaced with another technique.

Each of the hanging pedal and the pedal hanger according to the present invention can be used not only for a general bicycle but also for, for example, a bicycle type training machine.

10 Suspended pedal 20 Pedal 30 Crank 40 Pedal hanger

Claims

A pedal with a tread that applies treading force,
A pedal hanger that is rotatably hung on the end of the crank and the pedal is attached to the bottom.
A hanging pedal characterized by being equipped with.
The hanging pedal according to claim 1, wherein the pedal hanger has a shaft member screwed to the crank, and the shaft member is pivotally supported via a bearing.
The hanging pedal according to claim 2, wherein the pedal hanger is provided with a screw hole.
The pedal includes a pedal shaft that can be screwed to the crank.
The crank is provided with a pedal shaft hole that can be screwed into the pedal shaft.
The hanging pedal according to claim 3, wherein the shaft member is screwed into the pedal shaft hole, and the pedal shaft is screwed into the screw hole.
A pedal hanger characterized in that a pedal that is rotatably suspended at the end of a crank and has a tread surface to which a pedaling force is applied is attached to the lower part.