TWI844197B - Two-legged stand for bicycles, and bicycle - Google Patents

Abstract

A stand (40) includes: a stand member (50) rotatably supported by a bicycle (1) so that the center of rotation (rc1) is located behind a rear wheel axle (3a), a lever member (60) including an operating portion (60P) positioned forward of a rotation center (rc2) in a flip-up state, and a link member (70) for linking the lever member and the stand member. The stand is configured such that the stand member can be rotated so as to move a grounding portion downward by pushing down the operating portion in the flip-up state to rotate the lever member. In a side view in the flip-up state, the lever member is located inside the outer circumference of a rear wheel (3).

Description

Bicycle rack and bicycle

The present invention relates to a bicycle bipedal frame and a bicycle.

Bicycles are widely used as a means of transportation that can be easily used by men, women, young and old. In recent years, electric assisted bicycles that use the driving force of a motor to assist the driver's pedaling force have also become increasingly popular. Electric assisted bicycles are disclosed in Patent Document 1, for example.

[Prior Art Literature] [Patent Literature]

[Patent document 1] Japanese Patent Publication No. 2014-196080

As a tripod for a bicycle, a double-leg tripod is widely used. For a bicycle equipped with a double-leg tripod, when the tripod is to be lowered, the user needs to move the legs to the rear end of the vehicle to operate the tripod. Therefore, it may be difficult for the user to reach the tripod with the legs while holding the handlebars, and the user is forced to change the posture drastically when operating the tripod. When a heavy load is piled on the bicycle, it is better to be able to operate in a stable state while holding the handlebars. In addition, there is also the following problem: when a large load is piled on the rear of the bicycle, or a rear-mounted child seat is installed, it is difficult to observe the tripod at the rear end of the vehicle.

The implementation method of the present invention is completed in view of the above-mentioned problem, and its purpose is to provide a bicycle double-legged rack that can be lowered without moving the legs significantly backward from the dismounting position.

This manual discloses a bicycle double-legged rack and a bicycle described in the following items.

[Item 1]

A two-legged bicycle frame is mounted on a bicycle and can switch between a grounding state and a springing state, and comprises: a frame member, which includes a grounding portion that contacts the ground in the grounding state and is rotatably supported on the bicycle in a manner that the rotation center is located further rearward than the rear wheel axle; a rod member, which is rotatably supported on the bicycle in a manner that the rotation center is located further forward than the front end of the frame member in the springing state and is included in the springing state. An operating portion located further forward than the rotation center of the above-mentioned rod member in the pop-up state; and a connecting rod member that connects the above-mentioned rod member with the above-mentioned leg frame member; the bicycle double-leg leg frame is formed so that by pressing the above-mentioned operating portion downward in the above-mentioned pop-up state to rotate the above-mentioned rod member, the above-mentioned leg frame member can be rotated in a manner such that the above-mentioned ground contact portion moves downward, and when viewed from the side in the above-mentioned pop-up state, the above-mentioned rod member is located further inward than the outer periphery of the rear wheel.

The bicycle double-legged frame of the embodiment of the present invention has, in addition to a leg frame member including a grounding portion that contacts the ground in a grounded state, a rod member that is rotatably supported on the bicycle in a manner that the center of rotation is located further forward than the front end of the leg frame member; and a connecting rod member that connects the rod member and the leg frame member; and the rod member includes an operating portion that is located further forward than the center of rotation of the rod member in a sprung state. Furthermore, the bicycle double-legged frame of the embodiment of the present invention is configured such that by pressing the operating portion of the rod member downward in a sprung state to rotate the rod member, the leg frame member can be rotated in a manner that the grounding portion moves downward. With this structure, the tripod operation (called "tripod lowering") from the spring-up state to the grounded state can be performed without moving the legs significantly backward from the dismounting position. Therefore, even when a heavy load is piled on the bicycle, the tripod can be lowered in a stable state (that is, without significantly changing the posture) while holding the handlebars. In addition, since the body weight can be applied to the operating part while holding the handlebars, the tripod can be lowered relatively easily. Furthermore, even when a rear-mounted child seat is installed on the bicycle, the operating part of the lever member is located at a position that is easily visible to the driver, so the tripod can be lowered appropriately from this aspect. Furthermore, in the bicycle bipedal frame of the embodiment of the present invention, the rod member is located further inward than the outer periphery of the rear wheel when viewed from the side in the pop-up state, so that the bicycle can be prevented from being stuck (contacted) by the rod member when crossing a step.

[Item 2]

A bicycle bipedal frame as described in item 1, wherein the connecting rod member is a member whose length does not substantially extend when switching from the above-mentioned springing state to the above-mentioned ground contact state.

From the perspective of allowing the leg structure, rod structure and connecting rod structure to properly function as a connecting rod mechanism when the leg structure is lowered, the connecting rod structure is preferably a structure that does not substantially extend in length when switching from the spring-up state to the grounded state.

[Item 3]

A two-legged bicycle frame as described in item 1 or 2, wherein the rod member is rotatably supported by the first supporting member at a position lower than the rear wheel axle.

Many other components of the bicycle can be placed around and above the rear wheel axle. Therefore, from the perspective of ease of layout, the rod component is preferably supported below the rear wheel axle.

[Item 4]

A bicycle bipedal frame as described in item 3, wherein the rod member has one end and another end, and a middle portion between the one end and the other end, and the middle portion of the rod member is supported by the first supporting member.

[Item 5]

A two-legged bicycle rack as described in item 4, wherein the one end of the rod member is the operating portion, and the other end of the rod member is connected to the connecting rod member.

[Item 6]

A bicycle double-legged frame as described in any one of items 1 to 5, wherein the frame structure is rotatably supported by a second supporting member at a lower side than the rear wheel axle.

]

[Item 7]

A bicycle double-legged frame as described in item 6, wherein the second supporting member is fixed to a pair of fixing plates near the rear wheel axle, and the frame member is supported by the pair of fixing plates.

[Item 8]

A two-legged bicycle frame as described in any one of items 1 to 7, wherein the frame structure further includes a pair of legs extending from the ground-contacting portion, and the connecting rod structure is connected to one of the pair of legs.

[Item 9]

A two-legged bicycle tripod as described in any one of items 1 to 8, wherein when viewed from the side in the above-mentioned pop-up state, the angle between the upper surface of the above-mentioned operating portion of the above-mentioned rod member and the horizontal direction is less than 45°.

From the perspective of properly lowering the tripod, it is preferred that the angle between the upper surface of the operating portion of the lever member and the horizontal direction is smaller to a certain extent when viewed from the side in the pop-up state. Specifically, the angle between the upper surface of the operating portion and the horizontal direction is preferably less than 45°, and more preferably less than 10°.

[Item 10]

A bicycle bipedal rack as described in any one of items 1 to 9, wherein when viewed from the side in the above-mentioned grounded state, the angle between the upper surface of the above-mentioned operating portion of the above-mentioned lever member and the horizontal direction is less than 90°.

[Item 11]

A two-legged bicycle tripod as described in any one of items 1 to 10, wherein in the above-mentioned pop-up state, the front end portion of the above-mentioned lever member includes the above-mentioned operating portion, and the above-mentioned lever member has a shape in which the lower surface of the above-mentioned front end portion is inclined obliquely forward and upward when viewed from the side in the above-mentioned pop-up state.

[Item 12]

A two-legged bicycle kickstand as described in any one of items 1 to 11, wherein the operating portion of the lever member is located above the lowest point of the lever member in the above-mentioned pop-up state.

[Item 13]

A bicycle bipedal frame as described in any one of items 1 to 12, wherein the operating portion of the rod member is located at the front end of the rod member in the above-mentioned pop-up state, and the width of the operating portion of the rod member is greater than the width of the portion of the rod member other than the operating portion.

From the perspective of making it easier to put down the tripod, it is preferable that the operating portion of the rod member is located at the front end of the rod member in the pop-up state. In addition, if the width of the operating portion of the rod member is greater than the width of the portion of the rod member other than the operating portion, the operability of the rod member can be further improved.

[Item 14]

A two-legged bicycle kickstand as described in any one of items 1 to 13, wherein in the above-mentioned pop-up state, the operating position of the above-mentioned lever member is further rearward than the rearmost point of the rotation trajectory of the pedal.

[Item 15]

A two-legged bicycle kickstand as described in any one of items 1 to 14, wherein in the above-mentioned pop-up state, the operating position of the above-mentioned lever member is located above the straight line connecting the lowest point of the rotation track of the pedal and the ground contact point of the rear wheel.

[Item 16]

A two-legged bicycle frame as described in any one of items 1 to 15, wherein the operating portion of the lever member is located on the inner side of a polygon with the outermost ends of the left and right pedals when located at the frontmost side and the left and right ends of the frame member as vertices when viewed from above.

If the operating part of the lever member is located on the inner side of a polygon with the outermost ends of the left and right pedals and the left and right ends of the foot frame member as vertices when viewed from above, it can prevent excessive load from being applied to the operating part when the bicycle falls.

[Item 17]

A bicycle bi-legged tripod as described in any one of items 1 to 16, wherein the connection between the rod member and the connecting rod member is referred to as a rod connection portion, and the connection between the leg member and the connecting rod member is referred to as a leg connection portion, in the above-mentioned pop-up state, the rod connection portion is located above the straight line connecting the rotation center of the rod member and the leg connection portion.

[Item 18]

As described in item 17, the bicycle bi-legged rack, wherein when switching from the above-mentioned pop-up state to the above-mentioned grounding state, the above-mentioned rod connecting part moves forward and upward.

[Item 19]

A two-legged bicycle kickstand as described in item 17 or 18, wherein when switching from the above-mentioned pop-up state to the above-mentioned ground contact state, the distance between the rotation center of the above-mentioned rod member and the above-mentioned kickstand connection portion becomes smaller.

[Item 20]

A bicycle having a bicycle double-legged rack as described in any one of items 1 to 19.

According to the implementation method of the present invention, a bicycle double-legged tripod can be provided, which can be lowered without moving the legs significantly backward from the dismounting position.

1:Bicycle

2:Front wheel

2a: Front wheel axle

3: Rear wheel

3a: Rear wheel axle

4:Handlebar

5:Handle

6: Front fork

7: Front basket

8: Seat tube

9: Saddle

10: Vehicle frame

11: Head tube

12: Down tube

13: Riser

15: Chainstays

16: Seatstays

17: Rear cargo rack

18: Infant seat (rear-mounted infant seat)

20: Drive unit

21: Electric motor

22: Shell

23: Crankshaft

24: Crank arm

26: Pedal

31: Drive sprocket

32: Driven sprocket

33: Auxiliary sprocket

34:Chain

35:Battery unit

40: Double-legged stand

50: Frame components

51: Grounding part

52: Feet

52a: Connection hole

52b: Connection hole

52c: Connection hole

53: Feet

53a:Connection hole

54A: Reinforcement components

54B: Reinforcement components

54C: Reinforcement components

54D: Reinforcement components

55: Stopper

60: Rod components

60P: Operation Department

61: Rod body

61a:Connection hole

61b: Connection hole

62: Operation pedal

63: Screws

70: Connecting rod component

70a:Connection hole

70b:Connection hole

81:Fixed plate

81a:Connection hole

81b: Connection hole

81f: Front part of the left fixed plate (first supporting member)

81r: Rear part of the left side fixing plate

82:Fixed plate

82a:Connection hole

91: Locking rod

91a: Connection hole

92: Coil spring

93: Coil spring

93A: Pin

93B:Sales

94: Sales

95: Sales

96: Sales

97: Sales

D1: The distance between the outermost ends of the left and right pedals when in the front position

D2: Distance between the left and right ends of the leg frame structure

L1: A straight line connecting the lowest point of the pedal's rotation track and the ground contact point of the rear wheel

L2: The straight line connecting the rotation center of the rod member and the connection part of the tripod

Lc: Rod connection part

p1: The last point of the pedal’s rotation trajectory

p2: The lowest point of the pedal’s rotation trajectory

p3: The contact point of the rear wheel

Po: A polygon with the outermost ends of the left and right pedals at the front and the left and right ends of the foot frame as vertices

rc1: rotation center of the leg frame structure

rc2: Rotation center of the rod component

rt: Rotational trajectory of the pedal

SA:Tripod assembly

Sc: Tripod connection part

W1: Width of the operating pedal along the left and right direction

W2: Width of the rod body along the left and right direction

α: The angle between the upper surface of the operating part and the horizontal direction when viewed from the side in the pop-up state

β: The angle between the upper surface of the operating part and the horizontal direction when viewed from the side in the grounded state

FIG1 is a schematic left side view of a bicycle 1 according to an embodiment of the present invention.

FIG. 2A is a diagram showing the periphery of the tripod 40 when it is in a grounded state.

FIG. 2B is a diagram showing the periphery of the tripod 40 in the pop-up state.

FIG. 3A schematically shows a front view of the support assembly SA when it is in the grounded state.

FIG3B schematically shows a left side view of the support assembly SA in the grounded state.

FIG4A is a schematic three-dimensional diagram of the tripod assembly SA in the pop-up state.

FIG4B is a schematic exploded perspective view of the tripod assembly SA in the pop-up state.

FIG. 5 is a diagram showing the shape change (position and orientation change of each component) of the tripod 40 when the tripod is lowered. The upper and lower sections respectively show the tripod 40 in the pop-up state and the grounded state, and the middle section shows the tripod 40 in the middle state between the pop-up state and the grounded state.

FIG6 is a diagram showing the tripod 40 in the pop-up state.

FIG. 7 is a top view showing an example of a preferred configuration of the operating portion 60P of the lever member 60.

FIG8 is a side view showing another example of the rod member 60.

Hereinafter, a bicycle of an embodiment of the present invention will be described with reference to the drawings. In the drawings referred to below, the same components are marked with the same reference symbols, and the description of the components will not be repeated. In addition, the dimensions of the components shown in each figure may not truly represent the actual dimensions of each component or the actual dimension ratio of the components to each other. Furthermore, the front, back, left, right, top, and bottom in the following description and drawings respectively refer to the front, back, left, right, top, and bottom when observed by a rider riding on the saddle (seat) of the bicycle. Of course, the present invention is not limited to the embodiments illustrated below.

[General structure of a bicycle]

Referring to FIG. 1 , a bicycle 1 according to an embodiment of the present invention is described. FIG. 1 schematically shows a left side view of the bicycle 1. The bicycle 1 illustrated here is an electric assisted bicycle. As shown in FIG. 1 , the bicycle 1 has a front wheel 2, a rear wheel 3, a body frame 10, a drive unit 20, and a double-legged frame 40.

The vehicle frame 10 includes a head tube 11, a down tube 12, a seat tube 13, a bracket (not shown), a pair of chain stays 15, and a pair of seat stays 16. The vehicle frame 10 is typically formed of a metal material (such as an aluminum alloy).

The head tube 11 is arranged at the front part of the bicycle 1. The front end of the down tube 12 is connected to the head tube 11. The down tube 12 extends backward and obliquely downward from the head tube 11. The seat tube 13 is connected to the rear end of the down tube 12. The seat tube 13 extends backward and obliquely upward from the rear end of the down tube 12. The bracket is installed at the rear end of the down tube 12. A pair of rear chain stays 15 are connected to the rear end of the bracket. The pair of rear chain stays 15 are arranged in a manner of clamping the rear wheel 3 from the left and right. One end of each rear seat fork 16 is connected to the rear end of each rear chain stay 15. A pair of rear seat forks 16 are arranged in a manner of clamping the rear wheel 3 from the left and right. The other end of each rear seat fork 16 is connected to the upper end of the seat tube 13.

The handlebar 4 is inserted into the head pipe 11 in a rotatable manner. A handlebar 5 is fixed to the upper end of the handlebar 4. A front fork 6 is fixed to the lower end of the handlebar 4. At the lower end of the front fork 6, the front wheel 2 is rotatably supported by the axle 2a. A front basket 7 is arranged in front of the head pipe 11 and the handlebar 4 so as to be located above the front wheel 2.

The seat tube 13 is cylindrical. The seat tube 8 is inserted into the seat tube 13. The saddle (seat) 9 is installed on the upper end of the seat tube 8.

At the rear end of a pair of rear chain stays 15, the rear wheel 3 is rotatably supported by the axle 3a. On the right side of the rear wheel 3, a driven sprocket 32 is arranged coaxially with the axle 3a. The driven sprocket 32 is connected to the rear wheel 3 via a one-way clutch (not shown). A rear cargo rack 17 is provided above the rear wheel 3. A child seat (rear child seat) 18 is installed on the rear cargo rack 17 so as to be located above the rear wheel 3.

The drive unit 20 is suspended on the bracket. The drive unit 20 is mounted on the bracket, for example, by fastening metal parts (not shown). The drive unit 20 includes an electric motor 21 and a housing 22 that accommodates the electric motor 21 and defines the shape of the drive unit 20. The drive unit 20 further includes a controller (motor control unit: not shown) that controls the electric motor 21.

The crankshaft 23 passes through the front part of the housing 22 in the left-right direction. The crankshaft 23 is rotatably supported on the housing 22 via a plurality of bearings (not shown).

A pair of crank arms 24 are mounted at both ends of the crankshaft 23. Pedals 26 are mounted at the head ends of each pair of crank arms 24. The rider steps on the pedals 26 to rotate the crankshaft 23.

A driving sprocket 31 is disposed coaxially with the crankshaft 23. A chain 34 is wound between the driving sprocket 31 and the driven sprocket 32. The chain 34 is also wound around the auxiliary sprocket 33. The driving sprocket 31 and the auxiliary sprocket 33 transmit the driving force to the rear wheel 3 via the chain 34. Specifically, the pedaling force generated by the rider pedaling the pedals 26 rotates the driving sprocket 31, and is transmitted to the rear wheel 3 via the chain 34 as the driving force for rotating the rear wheel 3 in the forward direction. Furthermore, the rotational force generated by the operation of the electric motor 21 causes the auxiliary sprocket 33 to rotate, and is transmitted to the rear wheel 3 via the chain 34 as a driving force for rotating the rear wheel 3 in the forward direction. In this way, the driving force output from the electric motor 21 can be used to assist the pedaling force generated by the rider pedaling the pedal 26.

A battery unit 35 is arranged behind the riser 13. The battery unit 35 supplies power to the electric motor 21 of the drive unit 20. The battery unit 35 has a battery and a battery control unit (neither of which is shown in the figure). The battery is a rechargeable battery that can be charged and discharged. The battery control unit controls the charging and discharging of the battery and monitors the output current and remaining capacity of the battery. A power line is provided between the battery unit 35 and the drive unit 20 to supply power from the battery to the electric motor 21.

The double-legged frame (hereinafter referred to as "frame") 40 is mounted on the body of the bicycle 1 via a pair of fixing plates 81, 82 (the fixing plate 82 on the right side is not shown in FIG. 1) fixed near the axle 3a of the rear wheel 3. The frame 40 can switch between the "grounding state" and the "pop-up state" by the user's operation. Furthermore, in this specification, the frame 40 and the pair of fixing plates 81, 82 are sometimes collectively referred to as the "frame assembly". In addition, the state of the frame assembly when the frame 40 is in the grounding state is sometimes referred to as the "grounding state", and the state of the frame assembly when the frame 40 is in the pop-up state is also sometimes referred to as the "pop-up state".

FIG. 2A is a diagram showing the periphery of the tripod 40 in the grounded state, and FIG. 2B is a diagram showing the periphery of the tripod 40 in the pop-up state. When the bicycle 1 is parked, the tripod 40 is in the grounded state. When riding the bicycle 1 and moving, the user switches the tripod 40 from the grounded state shown in FIG. 2A to the pop-up state shown in FIG. 2B. Also, when parking the bicycle, the user switches the tripod 40 from the pop-up state shown in FIG. 2B to the grounded state shown in FIG. 2A (this tripod operation is referred to as "tripod lowering").

[Composition of the stand assembly]

In addition to referring to FIG. 1, FIG. 2A and FIG. 2B, the structure of the bicycle 1's footrest assembly SA is described with reference to FIG. 3A, FIG. 3B, FIG. 4A and FIG. 4B. FIG. 3A and FIG. 3B schematically show the front view and left side view of the footrest assembly SA in the grounded state. FIG. 4A and FIG. 4B schematically show the three-dimensional view and exploded three-dimensional view of the footrest assembly SA in the pop-up state.

As shown in FIG. 3A to FIG. 4B , the tripod assembly SA includes a tripod 40 and a pair of fixing plates 81 and 82. The tripod 40 has a tripod member 50, a rod member 60 and a connecting rod member 70. In addition, the tripod assembly SA further includes a locking rod 91 and a pair of coil springs 92 and 93.

The leg structure 50 includes a grounding portion 51 and a pair of legs 52, 53. The grounding portion 51 is a portion that is in contact with the ground when the leg 40 is in a grounded state. The pair of legs 52, 53 extend from the grounding portion 51. More specifically, the pair of legs 52, 53 extend from the left and right ends of the grounding portion 51 and are located at positions separated from each other in the left-right direction.

The leg frame member 50 is formed of, for example, a metal material. The leg frame member 50 can be formed, for example, by bending and pressing a rod-shaped member. In the example shown in the figure, the leg frame member 50 is provided with a plurality of rod-shaped reinforcing members 54A, 54B, 54C, and 54D that connect the grounding portion 51 and a pair of legs 52 and 53 to each other. The shape of the leg frame member 50 is not limited to the example shown in the figure. The reinforcing members 54A, 54B, 54C, and 54D can also be omitted.

The foot frame member 50 is rotatably connected to a pair of fixed plates 81 and 82. Here, connecting holes 52a and 53a (see FIG. 4B ) are formed at the ends (front ends in the popped-up state) of each of the pair of feet 52 and 53, and connecting holes 81a and 82a (see FIG. 4B ) are formed at the pair of fixed plates 81 and 82, respectively. The foot frame member 50 is connected to the pair of fixed plates 81 and 82 by means of a pin 93A inserted through the connecting holes 52a and 81a and a pin 93B inserted through the connecting holes 53a and 82a.

As shown in FIG. 2A and FIG. 2B , the rotation center rc1 (the center axis of the pins 93A and 93B) of the foot frame member 50 is located further back than the axle 3a of the rear wheel 3. That is, the foot frame member 50 is rotatably supported on the bicycle 1 in such a manner that the rotation center rc1 is located further back than the axle 3a of the rear wheel 3. In the example shown in the figure, the foot frame member 50 is supported by the fixing plates 81 and 82 further down than the axle 3a of the rear wheel 3.

The locking rod 91 is rotatably connected to the left leg 52. Here, a connection hole 52b (see FIG. 4B ) is formed near the end of the left leg 52 (near the front end in the popped-up state), and a connection hole 91a (see FIG. 4B ) is formed in the locking rod 91. The locking rod 91 is connected to the left leg 52 by a pin 94 inserted through the connection holes 52b and 91a. The locking rod 91 functions to prevent the leg frame member 50 from rotating relative to the left fixing plate 81 by being clamped on the left fixing plate 81.

A coil spring 92 is connected to the locking rod 91 and the left fixing plate 81. The locking rod 91 can move between a "locking position" where it is stuck in the left fixing plate 81 to prevent the leg frame member 50 from rotating, and a "lock release position" where it is separated from the left fixing plate 81 to allow the leg frame member 50 to rotate. The locking rod 91 is usually in the locking position due to the elastic pressure of the coil spring 92. The locking rod 91 can be moved from the locking position to the lock release position by being operated by the user with the toe or the like.

A stopper 55 is provided on the right foot 53 in a manner that protrudes slightly outward (to the right). A coil spring 93 is connected between the stopper 55 and the right fixing plate 82. The right foot 53 is pressed by the coil spring 93 in the same direction as the left foot 52.

The lever member 60 includes an operating portion 60P for the user to operate. If the lever member 60 is divided into one end and the other end, and a middle portion between the one end and the other end, then one end of the lever member 60 is the operating portion 60P. In the example shown in the figure, the lever member 60 includes a lever body 61 and an operating pedal 62.

The rod body 61 has a U-shaped bend when viewed from the side. More specifically, the rod body 61 is bent in a downwardly convex manner in the spring state. The rod body 61 is formed of a metal material, for example.

The operating pedal 62 includes a plate-shaped portion. The operating pedal 62 is mounted on one end of the rod body 61 and is located at the operating portion 60P. In the illustrated example, the operating pedal 62 is mounted on the rod body 61 by a plurality of screws 63. The width W1 of the operating pedal 62 along the left-right direction (refer to FIG. 3A ) is greater than the width W2 of the rod body 61 along the left-right direction (refer to FIG. 3A ). Therefore, the width of the operating portion 60P of the rod member 60 is greater than the width of the portion of the rod member 60 other than the operating portion 60P. Furthermore, in this specification, the width W1 of the operating pedal 62 (also the width of the operating portion 60P) refers to the maximum width of the operating pedal 62 along the left-right direction. The width W1 of the operating pedal 62 is, for example, not less than 30 mm and not more than 80 mm. The operating pedal 62 is formed of, for example, a resin material, a rubber material, or a metal material.

The rod member 60 is rotatably connected to the left fixed plate 81. Here, a connecting hole 61a (see FIG. 4B ) is formed in the middle of the rod body 61, and a connecting hole 81b (see FIG. 4B ) is formed at the lower end of the front part of the left fixed plate 81. The rod member 60 is connected to the left fixed plate 81 by a pin 95 inserted through the connecting holes 61a and 81b.

As shown in FIG. 2B , the rotation center rc2 (the center axis of the pin 95) of the rod member 60 is located further forward than the front end of the foot frame member 50 in the pop-up state. That is, the rod member 60 is supported on the bicycle 1 in a freely rotatable manner in such a manner that the rotation center rc2 is located further forward than the front end of the foot frame member 50 in the pop-up state. In the illustrated example, the rod member 60 is supported by the left side fixing plate 81 further below the axle 3a of the rear wheel 3. In addition, the middle portion of the rod member 60 is supported by the left side fixing plate 81.

As shown in FIG. 2B , the operating portion 60P of the lever member 60 is located further forward than the rotation center rc2 of the lever member 60 in the pop-up state. In addition, the operating portion 60P is located further up than the lowest point of the lever member 60 in the pop-up state.

Furthermore, in FIG. 2B , the rotation track rt of the pedal 26 is indicated by a single-point chain line. As shown in FIG. 2B , the operating portion 60P is located further back than the last point p1 of the rotation track rt of the pedal 26 in the bounced state. Furthermore, in FIG. 2B , the straight line L1 connecting the lowest point p2 of the rotation track rt of the pedal 26 and the ground contact point p3 of the rear wheel 3 is indicated by a double-point chain line. As shown in FIG. 2B , the operating portion 60P is located further up than the straight line L1 in the bounced state.

Furthermore, as shown in FIG. 2B , when viewed from the side in the pop-up state, the lever member 60 is located further inward than the outer periphery of the rear wheel 3. That is, the lever member 60 does not include a portion located further outward than the outer periphery of the rear wheel 3 when viewed from the side in the pop-up state.

As described above, the right side fixing plate 82 supports the leg frame member 50, whereas the left side fixing plate 81 supports the leg frame member 50 and the rod member 60. In this specification, the front portion 81f of the left side fixing plate 81 (i.e., the portion supporting the rod member 60) is sometimes referred to as the "first supporting member", and the rear portion 81r of the left side fixing plate 81 (i.e., the portion supporting the leg frame member 50) and the right side fixing plate 82 are collectively referred to as the "second supporting member".

The connecting rod member 70 connects the rod member 60 and the leg frame member 50. Specifically, the connecting rod member 70 is connected to the other end of the rod member 60 (not the end on the operating portion 60P side), and is connected to the left leg 52 of the leg frame member 50. Here, a connecting hole 70a (refer to FIG. 4B) is formed at one end of the connecting rod member 70, and a connecting hole 61b (refer to FIG. 4B) is formed at the end (the rear end in the spring state) of the rod body 61. The connecting rod member 70 is rotatably connected to the rod member 60 by means of a pin 96 inserted through the connecting holes 70a and 61b. Furthermore, a connecting hole 70b (see FIG. 4B ) is formed at the other end of the connecting rod member 70, and a connecting hole 52c (see FIG. 4B ) is formed at the left foot portion 52. The connecting rod member 70 is rotatably connected to the foot frame member 50 by means of a pin 97 inserted through the connecting holes 70b and 52c.

In the example shown in the figure, the connecting rod member 70 is a rod-shaped member. The connecting rod member 70 is formed of a metal material, for example. In the following description, the connecting portion between the rod member 60 and the connecting rod member 70 is sometimes referred to as a "rod connecting portion", and the connecting portion between the leg member 50 and the connecting rod member 70 is sometimes referred to as a "leg connecting portion".

Referring to FIG. 5 , the lowering of the tripod of the bicycle 1 of this embodiment is described. FIG. 5 is a diagram showing the shape change (position and orientation change of each component) of the tripod 40 when the tripod is lowered. The upper and lower sections of FIG. 5 respectively show the tripod 40 in the pop-up state and the grounded state, and the middle section of FIG. 5 shows the tripod 40 in the middle state between the pop-up state and the grounded state.

As shown in the upper part of FIG. 5 , in the pop-up state, the rod connection portion Lc is located above the straight line L2 connecting the rotation center rc2 of the rod member 60 and the leg connection portion Sc. In the bicycle 1 of this embodiment, the leg is lowered by pressing the operating portion 60P in the pop-up state downward. The pressing of the operating portion 60P is performed, for example, by the user's foot.

If the operating part 60P is pressed down, as shown in the middle section of Figure 5, the rod member 60 rotates forward (counterclockwise in the figure), so the rod connection part Lc moves forward and upward, and the tripod connection part Sc also moves forward. At this time, the distance between the rotation center rc2 of the rod member 60 and the tripod connection part Sc becomes smaller. Moreover, as the tripod connection part Sc moves forward, the tripod member 50 rotates backward (clockwise in the figure) in the manner that the grounding part 51 moves downward.

As shown in the lower part of Figure 5, the grounding portion 51 of the tripod structure 50 moves to a position in contact with the ground and the tripod 40 becomes grounded, thereby completing the lowering of the tripod.

In this way, the leg 40 is configured such that by pressing the operating portion 60P downward in the pop-up state to rotate the rod member, the leg member 50 can be rotated in such a way that the grounding portion 51 moves downward.

As described above, the foot frame 40 of the bicycle 1 in the present embodiment includes, in addition to the foot frame member 50 including the ground contacting portion 51 in the ground contacting state, a rod member 60 rotatably supported on the bicycle 1 in such a manner that the rotation center rc2 is located further forward than the front end of the foot frame member 50; and a connecting rod member 70 connecting the rod member 60 to the foot frame member 50; and the rod member 60 includes an operating portion 60P, which is located further forward than the rotation center rc2 of the rod member 60 in the pop-up state. Furthermore, the tripod 40 is configured such that, by pressing the operating portion 60P of the lever member 60 downward in the popped-up state to rotate the lever member 60, the tripod member 50 can be rotated in such a manner that the ground contact portion 51 moves downward. With this configuration, the tripod can be lowered without the foot moving greatly backward from the dismounting position. Therefore, even when a heavy load is piled on the bicycle 1, the tripod can be lowered in a stable state (that is, without greatly changing the posture) while holding the handlebar 5. Furthermore, since the body weight can be applied to the operating portion 60P while holding the handlebar 5, the tripod can be lowered relatively easily. Furthermore, even when the bicycle 1 is equipped with a rear child seat 18, the operating portion 60P of the lever member 60 is located at a position that is easily visible to the driver, so the leg stand can be lowered appropriately in this respect. In addition, in the leg stand 40, when viewed from the side in the pop-up state, the lever member 60 is located further inward than the outer periphery of the rear wheel 3, so that the lever member 60 can be prevented from being stuck (contacted) when the bicycle 1 passes over a step.

Furthermore, according to the situation already described, when the tripod is lowered, the rod member 60 functions as a "lever" with the rotation center rc2 as the fulcrum, the operating portion 60P as the force point, and the end connected to the connecting rod member 70 as the action point, so the operating weight can also be reduced.

From the perspective of allowing the leg member 50, the rod member 60 and the connecting rod member 70 to properly function as a connecting rod mechanism when the leg member is lowered, the connecting rod member 70 is preferably a member whose length does not substantially extend when switching from the spring-up state to the grounded state. Here, the so-called "substantially no extension" of the length of the connecting rod member 70 means that even if a tensile load of the degree usually assumed when the leg member is lowered acts on the connecting rod member 70, its length hardly increases. Furthermore, the connecting rod member 70 is not limited to the rod-shaped member shown in the example, and can also be a wire, for example.

Many other components of the bicycle 1 can be arranged around and on the upper side of the axle 3a of the rear wheel 3. Therefore, from the perspective of ease of layout, the rod component 60 is preferably supported on the lower side of the axle 3a of the rear wheel 3 as shown in FIG. 2A and the like.

As already explained, the operating portion 60P of the lever member 60 is a portion for the user to operate when the tripod is lowered. Therefore, from the viewpoint of properly lowering the tripod, it is preferred that the angle α (refer to the upper section of FIG. 5 ) formed between the upper surface of the operating portion 60P and the horizontal direction when viewed from the side in the pop-up state is smaller to a certain extent. Specifically, the angle α formed between the upper surface of the operating portion 60P and the horizontal direction is preferably less than 45°, and more preferably less than 10°. Furthermore, FIG. 5 illustrates a case where the upper surface of the operating portion 60P is tilted in the rearward direction (clockwise in the figure) relative to the horizontal direction, but as shown in FIG. 6 , the upper surface of the operating portion 60P may be tilted in the forward direction (counterclockwise in the figure) relative to the horizontal direction. Therefore, if the tilt angle when the upper surface of the operating part 60P tilts backward relative to the horizontal direction is represented by a positive value, and the tilt angle when it tilts forward is represented by a negative value, then "the angle α formed by the upper surface of the operating part 60P and the horizontal direction is less than 45°" means that the tilt angle of the upper surface of the operating part 60P is within ±45°. Similarly, "the angle α formed by the upper surface of the operating part 60P and the horizontal direction is less than 10°" means that the tilt angle of the upper surface of the operating part 60P is within ±10°.

Furthermore, when viewed from the side in the grounded state, the angle β (see the lower section of FIG. 5 ) formed between the upper surface of the operating portion 60P and the horizontal direction is, for example, less than 90°.

Furthermore, from the perspective of making it easier to put down the tripod, it is preferable that the operating portion 60P of the rod member 60 is located at the front end of the rod member 60 in the pop-up state as shown in FIG. 4A and the like. Furthermore, if the width of the operating portion 60P of the rod member 60 is greater than the width of the portion of the rod member 60 other than the operating portion 60P, the operability of the rod member 60 can be further improved.

FIG. 7 shows an example of a preferred arrangement of the operating portion 60P of the lever member 60 when viewed from above. FIG. 7 shows a polygon (quadrilateral) Po with the outermost ends of the left and right pedals 26 when located at the frontmost side and the left and right ends of the leg frame member 50 in the spring-up state as vertices as chain lines. As shown in FIG. 7 , the operating portion 60P is preferably located inside the polygon Po when viewed from above. If the operating portion 60P is located inside the polygon Po when viewed from above, the operating portion 60P is unlikely to directly collide with the ground when the bicycle 1 falls, thereby preventing an excessive load from being applied to the operating portion 60P. Furthermore, FIG. 7 shows an example in which the distance D1 between the outermost ends of the left and right pedals 26 when located at the frontmost side is greater than the distance D2 between the left and right ends of the foot frame member 50, but the distance D1 may also be smaller than the distance D2.

In the example shown in FIG. 2B and the like, in the pop-up state, the front end portion of the rod member 60 includes an operating portion 60P, and the rod member 60 has a shape in which the lower surface of the front end portion is inclined forward and upward when viewed from the side in the pop-up state. The rod member 60 having such a shape is not limited to one including a rod body 61 that is bent in a U-shape when viewed from the side. FIG. 8 is a side view showing another example of the rod member 60. In the example shown in FIG. 8, the rod member 60 is a straight line when viewed from the side. Furthermore, in the example shown in FIG. 8, in order to make the angle between the upper surface of the operating portion 60P in the pop-up state and the horizontal direction relatively small, the operating pedal 62 is triangular when viewed from the side. This operating pedal 62 can be formed of a resin material or a rubber material, for example, similarly to the operating pedal 62 shown in FIG. 3A .

In the above description, the bicycle 1 is illustrated as an electric-assisted bicycle, but the bicycle of the embodiment of the present invention may not be an electric-assisted bicycle. In addition, in the above description, the bicycle 1 with two wheels (a front wheel 2 and a rear wheel 3) is illustrated, but the bicycle of the embodiment of the present invention may also be a bicycle with more than three wheels.

As described above, the bicycle double-legged frame 40 of the embodiment of the present invention is mounted on the bicycle 1 and can switch between the grounding state and the sprung state, and comprises: a frame member 50, which includes a grounding portion 51 that contacts the ground in the grounding state, and is rotatably supported on the bicycle 1 in such a manner that the rotation center rc1 is located further rearward than the rear wheel axle 3a; a rod member 60, The bicycle 1 is rotatably supported in such a manner that the rotation center rc2 is located further forward than the front end of the leg frame member 50 in the above-mentioned pop-up state, and includes an operating portion 60P located further forward than the rotation center rc2 of the rod member 60 in the above-mentioned pop-up state; and a connecting rod member 70 that connects the rod member 60 with the leg frame member 50. The bicycle two-legged leg frame 40 is configured such that the leg frame member 50 can be rotated in such a manner that the ground contact portion 51 moves downward by pressing the operating portion 60P downward in the above-mentioned pop-up state to rotate the rod member 60. When viewed from the side in the above-mentioned pop-up state, the above-mentioned rod member 60 is located further inward than the outer periphery of the rear wheel 3.

The bicycle double-legged kickstand 40 of the embodiment of the present invention has, in addition to the foot frame member 50 including a ground contacting portion 51 in contact with the ground in the grounded state, a rod member 60 rotatably supported on the bicycle 1 in a manner such that the rotation center rc2 is located further forward than the front end of the foot frame member 50; and a connecting rod member 70 connecting the rod member 60 with the foot frame member 50; and the rod member 60 includes an operating portion 60P, which is located further forward than the rotation center rc2 of the rod member 60 in the pop-up state. Furthermore, the bicycle double-legged tripod 40 of the embodiment of the present invention is configured such that, by pressing the operating portion 60P of the rod member 60 downward in the pop-up state to rotate the rod member 60, the tripod member 50 can be rotated in such a manner that the grounding portion 51 moves downward. With this configuration, the tripod operation (referred to as "tripod lowering") from the pop-up state to the grounding state can be performed without moving the legs significantly backward from the dismounting position. Therefore, even when a heavy load is piled on the bicycle 1, the tripod can be lowered in a stable state (i.e., without significantly changing the posture) while holding the handlebar 5. Furthermore, since the body weight can be applied to the operating portion 60P while holding the handlebar 5, the tripod can be lowered relatively easily. Furthermore, even when the rear child seat 18 is installed on the bicycle 1, the operating portion 60P of the lever member 60 is located at a position that is easily visible to the driver, so the tripod can be lowered appropriately in this respect. Furthermore, in the bicycle double-legged tripod 40 of the embodiment of the present invention, when viewed from the side in the pop-up state, the lever member 60 is located further inward than the outer periphery of the rear wheel 3, so it is possible to prevent the bicycle 1 from being stuck (contacted) by the lever member 60 when crossing a step, etc.

In a certain embodiment, the connecting rod member 70 is a member whose length does not substantially extend when switching from the above-mentioned spring state to the above-mentioned grounding state.

From the perspective of allowing the leg member 50, the rod member 60 and the connecting rod member 70 to properly function as a connecting rod mechanism when the leg member is lowered, the connecting rod member 70 is preferably a member whose length does not substantially extend when switching from the spring-up state to the grounded state.

In one embodiment, the rod member is rotatably supported by the first supporting member 81f at a lower side than the rear wheel axle 3a.

Many other components of the bicycle 1 can be arranged around and on the upper side of the rear wheel axle 3a. Therefore, from the perspective of ease of layout, the rod component 60 is preferably supported at a lower side than the rear wheel axle 3a.

In a certain embodiment, the rod member 60 has one end and another end, and a middle portion between the one end and the other end, and the middle portion of the rod member 60 is supported by the first supporting member 81f.

In a certain embodiment, the one end of the rod member 60 is the operating portion 60P, and the other end of the rod member 60 is connected to the connecting rod member 70.

In a certain embodiment, the above-mentioned leg frame member is rotatably supported by the second supporting members 81r and 82 at a lower side than the rear wheel axle 3a.

In a certain embodiment, the second supporting members 81r, 82 are fixed to a pair of fixing plates 81, 82 near the rear wheel axle 3a, and the leg frame member 50 is supported by the pair of fixing plates 81, 82.

The leg frame member 50 further includes a pair of legs 52, 53 extending from the grounding portion 51, and the connecting rod member 70 is connected to one of the pair of legs 52, 53.

In a certain embodiment, when viewed from the side in the above-mentioned pop-up state, the angle α between the upper surface of the above-mentioned operating portion 60P of the above-mentioned lever member 60 and the horizontal direction is less than 45°.

From the perspective of properly lowering the tripod, it is preferred that the angle α between the upper surface of the operating portion 60P of the lever member 60 and the horizontal direction when viewed from the side in the pop-up state is smaller to a certain extent. Specifically, the angle α between the upper surface of the operating portion 60P and the horizontal direction is preferably less than 45°, and more preferably less than 10°.

In a certain embodiment, when viewed from the side in the grounded state, the angle β between the upper surface of the operating portion 60P of the lever member 60 and the horizontal direction is less than 90°.

In a certain embodiment, in the above-mentioned pop-up state, the front end portion of the above-mentioned lever member 60 includes the above-mentioned operating portion 60P, and the above-mentioned lever member 60 has a shape in which the lower surface of the above-mentioned front end portion is inclined forward and upward when viewed from the side in the above-mentioned pop-up state.

In a certain embodiment, the operating portion 60P of the lever member 60 is located above the lowest point of the lever member 60 in the above-mentioned pop-up state.

In a certain embodiment, the operating portion 60P of the rod member 60 is located at the front end of the rod member 60 in the above-mentioned pop-up state, and the width of the operating portion 60P of the rod member 60 is greater than the width of the portion of the rod member 60 other than the operating portion 60P.

From the perspective of making it easier to put down the tripod, it is preferable that the operating portion 60P of the rod member 60 is located at the front end of the rod member 60 in the pop-up state. In addition, if the width of the operating portion 60P of the rod member 60 is greater than the width of the portion of the rod member 60 other than the operating portion 60P, the operability of the rod member 60 can be further improved.

In a certain embodiment, in the above-mentioned bounced state, the operating portion 60P of the above-mentioned lever member 60 is located further back than the last point p1 of the rotation trajectory rt of the pedal 26.

In a certain embodiment, in the above-mentioned bounced state, the operating portion 60P of the above-mentioned lever member 60 is located above the straight line L1 connecting the lowest point p2 of the rotation trajectory rt of the pedal 26 and the ground contact point p3 of the rear wheel 3.

In a certain embodiment, when viewed from above, the operating portion 60P of the lever member 60 is located on the inner side of a polygon Po having the outermost ends of the left and right pedals 26 when located at the frontmost side and the left and right ends of the leg frame member 50 as vertices.

When viewed from above, the operating portion 60P of the lever member 60 is located on the inner side of a polygon Po with the outermost ends of the left and right pedals 26 and the left and right ends of the foot frame member 50 as vertices, which can prevent excessive load from being applied to the operating portion 60P when the bicycle 1 falls.

In a certain embodiment, the connecting portion between the rod member 60 and the connecting rod member 70 is called the rod connecting portion Lc, and the connecting portion between the leg member 50 and the connecting rod member 70 is called the leg connecting portion Sc. In the above-mentioned pop-up state, the rod connecting portion Lc is located above the straight line L2 connecting the rotation center rc2 of the rod member 60 and the leg connecting portion Sc.

In a certain embodiment, when switching from the above-mentioned bounce state to the above-mentioned grounding state, the above-mentioned rod connection part Lc moves forward and upward.

In a certain embodiment, when switching from the above-mentioned bounce state to the above-mentioned grounding state, the distance between the rotation center rc2 of the above-mentioned rod member 60 and the above-mentioned leg connecting part Sc becomes smaller.

The bicycle 1 of the embodiment of the present invention is equipped with a bicycle double-legged frame 40 having any of the above-mentioned structures.

[Industrial availability]

According to the implementation method of the present invention, a bicycle double-legged tripod can be provided, which can be lowered without moving the legs significantly backward from the dismounting position. The implementation method of the present invention can be widely applied to various bicycles.

1:Bicycle

2:Front wheel

2a: Front wheel axle

3: Rear wheel

3a: Rear wheel axle

4:Handlebar

5:Handle

6: Front fork

7: Front basket

8: Seat tube

9: Saddle

10: Vehicle frame

11: Head tube

12: Down tube

13: Riser

15: Chainstays

16: Seatstays

17: Rear cargo rack

18: Infant seat (rear-mounted infant seat)

20: Drive unit

21: Electric motor

22: Shell

23: Crankshaft

24: Crank arm

26: Pedal

31: Drive sprocket

32: Driven sprocket

33: Auxiliary sprocket

34:Chain

35:Battery unit

40: Double-legged stand

50: Frame components

60: Rod components

70: Connecting rod component

81:Fixed plate

Claims (20)

A two-legged bicycle frame is mounted on a bicycle and can switch between a grounding state and a springing state, and comprises: a frame member, which includes a grounding portion that contacts the ground in the grounding state and is rotatably supported on the bicycle in a manner that the rotation center is located further rearward than the rear wheel axle; a rod member, which is rotatably supported on the bicycle in a manner that the rotation center is located further forward than the front end of the frame member in the springing state and is included in the frame member. An operating portion located further forward than the rotation center of the above-mentioned rod member in the pop-up state; and a connecting rod member, which connects the above-mentioned rod member with the above-mentioned leg frame member; the bicycle double-leg leg frame is formed so that by pressing the above-mentioned operating portion downward in the above-mentioned pop-up state to rotate the above-mentioned rod member, the above-mentioned leg frame member can be rotated in a manner that the above-mentioned ground contact portion moves downward, and when viewed from the side in the above-mentioned pop-up state, the above-mentioned rod member is located further inward than the outer periphery of the rear wheel. As in claim 1, the bicycle bi-legged kickstand, wherein the connecting rod member is a member whose length does not substantially extend when switching from the above-mentioned springing state to the above-mentioned ground contact state. A two-legged bicycle rack as claimed in claim 1 or 2, wherein the rod member is rotatably supported by the first supporting member at a position lower than the rear wheel axle. A bicycle bipedal frame as claimed in claim 3, wherein the rod member has one end and another end, and a middle portion between the one end and the other end, and the middle portion of the rod member is supported by the first supporting member. As in claim 4, the bicycle bi-legged tripod, wherein the one end of the rod member is the operating portion, and the other end of the rod member is connected to the connecting rod member. A two-legged bicycle tripod as claimed in claim 1 or 2, wherein the tripod member is rotatably supported by a second supporting member at a lower side than the rear wheel axle. As in claim 6, the bicycle double-legged frame, wherein the second supporting member is fixed to a pair of fixing plates near the rear wheel axle, and the frame member is supported by the pair of fixing plates. A two-legged bicycle kickstand as claimed in claim 1 or 2, wherein the kickstand structure further comprises a pair of legs extending from the ground-contacting portion, and the connecting rod structure is connected to one of the pair of legs. For example, in the bicycle bipedal tripod of claim 1 or 2, when viewed from the side in the above-mentioned pop-up state, the angle between the upper surface of the above-mentioned operating portion of the above-mentioned rod member and the horizontal direction is less than 45°. For example, in the bicycle double-legged tripod of claim 1 or 2, when viewed from the side in the grounded state, the angle between the upper surface of the operating portion of the lever member and the horizontal direction is less than 90°. A two-legged bicycle tripod as claimed in claim 1 or 2, wherein in the above-mentioned pop-up state, the front end portion of the above-mentioned lever member includes the above-mentioned operating portion, and the above-mentioned lever member has a shape in which the lower surface of the above-mentioned front end portion is inclined obliquely forward and upward when viewed from the side in the above-mentioned pop-up state. A two-legged bicycle kickstand as claimed in claim 1 or 2, wherein the operating portion of the lever member is located above the lowest point of the lever member in the pop-up state. A two-legged bicycle kickstand as claimed in claim 1 or 2, wherein the operating portion of the rod member is located at the front end of the rod member in the pop-up state, and the width of the operating portion of the rod member is greater than the width of the portion of the rod member other than the operating portion. A two-legged bicycle kickstand as claimed in claim 1 or 2, wherein in the above-mentioned pop-up state, the operating position of the above-mentioned lever member is further rearward than the rearmost point of the rotation trajectory of the pedal. A two-legged bicycle kickstand as claimed in claim 1 or 2, wherein in the above-mentioned pop-up state, the operating position of the above-mentioned lever member is located above the straight line connecting the lowest point of the rotation track of the pedal and the ground contact point of the rear wheel. A two-legged bicycle frame as claimed in claim 1 or 2, wherein, in a top view, the operating portion of the lever member is located on the inner side of a polygon with the outermost ends of the left and right pedals when the pedals are located at the frontmost side and the left and right ends of the frame member as vertices. For a bicycle bi-legged tripod as claimed in claim 1 or 2, when the connection between the rod member and the connecting rod member is referred to as a rod connection portion, and the connection between the leg frame member and the connecting rod member is referred to as a leg frame connection portion, in the above-mentioned pop-up state, the rod connection portion is located above the straight line connecting the rotation center of the rod member and the leg frame connection portion. For example, in the bicycle double-legged kickstand of claim 17, when switching from the above-mentioned pop-up state to the above-mentioned grounding state, the above-mentioned rod connecting portion moves forward and upward. For example, in the bicycle double-legged kickstand of claim 17, when switching from the above-mentioned pop-up state to the above-mentioned grounding state, the distance between the rotation center of the above-mentioned rod member and the above-mentioned kickstand connection portion becomes smaller. A bicycle having a bicycle double-legged rack as claimed in any one of claims 1 to 19.