JP2017088057A - bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bicycle which enables not only low speed travel, but also high speed travel of the bicycle itself while reducing muscle fatigue.SOLUTION: A bicycle, which comprises a bicycle body 2, a saddle 3, and a rotational drive wheel 36 which transmits forward rotational force to a rear wheel 17 of the bicycle body 2 via a chain 21, is so configured as to have stepping-down type forward travel driving means 31 comprising: left and right pedals 32a, 32b which alternately receive a stepping-down force by both foots; a linear/rotational power conversion mechanism part which applies continuous forward rotational force to a rotational drive wheel 36 according to the stepping-down force which acts on the left and right pedals 32a, 32b alternately; and a pedal position interlock mechanism part which returns one pedal 32a, 32b from a stepping-down end position to a stepping-down start position by using a steeping-down force when the other pedal 32a or 32b is displaced from the stepping-down start position to the stepping-down end position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bicycle, and more specifically, the bicycle itself can be traveled forward by obtaining forward rotational force by repeating the direct step-down operation of alternating left and right feet using the driver's weight to the maximum. It relates to a bicycle with a novel structure.

  Most bicycles that have been used in general have a structure in which the left and right foot arches are brought into close contact with the left and right pedals to rotate the left and right pedals, thereby moving the bicycle forward. It is.

  In such a conventional bicycle, in order to increase the traveling speed and travel forward, a great burden is placed on the muscles of the driver's thighs, which causes muscle fatigue. If it was not strengthened, it was difficult to move forward at a higher speed.

  Further, it has been impossible for an elderly person or the like whose thigh muscles are weakened to move forward at a higher traveling speed.

  In Patent Document 1, a crank part and a pedal of a drive unit jump up upwards by attaching a spring part to a frame at the end of a transmission belt. When this pedal is depressed, the main rotating shaft free wheel is moved by the transmission belt, the main rotating shaft free wheel and the coaxial chain wheel rotate simultaneously, and the main transmission belt rotates by moving the rear wheel shaft free wheel and the rear wheel. An up-and-down reciprocating pedal type leisure bicycle configured as described above is disclosed.

  Patent Document 2 includes a pair of vertical movement links disposed on the left and right sides from the frame constituting the framework of the vehicle body, and a drive unit for driving the rear wheel, and the pair of vertical movement links has a front end side. Attached to the frame side, the rear end side is connected to the pedal, and the drive unit has crank arms arranged symmetrically by 180 ° on both sides of the drive shaft in the left-right direction, and a pair of left and right pedals are alternately raised and lowered There is disclosed a bicycle configured to transmit a stepping force so as to swing in a direction to a crank arm via a vertical movement link.

  However, the inventions of Patent Literature 1 and Patent Literature 2 and the technical contents of the invention both convert the stepping force of the driver's left and right feet against the pair of left and right pedals into the rotational motion of the rotating shaft and chain wheel via the crank mechanism. It is not necessary to have a saddle on which the driver sits, and it is applied to a bicycle traveling on a normal road, and muscle fatigue is applied. It is not suitable for applications that enable high-speed running as well as low-speed running of the bicycle itself, while reducing the number.

Registered Utility Model No. 3126888 International Publication No. 2014/065163

  The problem to be solved by the present invention is that the forward rotational force can be easily obtained by repeating the direct stepping motion of the left and right feet alternately using the driver's weight to the maximum based on the simple configuration. However, even in the case of a driver whose thigh muscles are weakened, there is no bicycle that allows high-speed running as well as low-speed running of the bicycle itself while reducing muscle fatigue.

  The present invention is a bicycle comprising a bicycle body and a rotational drive wheel disposed below the saddle of the bicycle body and transmitting forward rotational force to the wheels of the bicycle body via a chain, and both left and right sides of the rotational drive wheel The left and right pedals alternately receiving the stepping force of the driver's both feet, and the straight line that causes the continuous forward rotational force to act on the rotating drive wheels according to the stepping force that alternately acts on the left and right pedals・ From the rotary power conversion mechanism and the left and right pedals, step on the other pedal from the step-down end position using the step-down force at the time of displacement from the step-down start position of one pedal to the step-down end position. And a pedal position interlocking mechanism for returning to the lowering start position, and having a step-down forward travel drive means comprising the main feature

  According to the first aspect of the present invention, the left and right pedals that are alternately disposed on the left and right sides of the rotational drive wheels of the bicycle body and alternately receive the stepping force of the driver's both feet, and the pedals that act alternately on the left and right pedals. The linear / rotary power conversion mechanism that applies a continuous forward rotational force to the rotary drive wheel in accordance with the lowering force, and the displacement of one of the left and right pedals from the stepping start position to the stepping end position Driving based on a simple configuration having a step-down type forward travel drive means comprising a pedal position interlocking mechanism part that uses the step-down force to return the other pedal from the step-down end position to the step-down start position By making direct use of the weight of the person to the maximum, the pedal body's forward rotation force can be easily obtained by repeating the direct depressing action of the left and right foot alternately on the left and right pedals. Is declining In the case with the driver, also, low-speed running of the bicycle itself while reducing muscle fatigue realized also bicycle speed running as well, can be provided.

  According to the second aspect of the present invention, the left and right pedals that are alternately disposed on the left and right sides of the rotational drive wheels of the bicycle body and alternately receive the stepping force of the driver's feet, and the stepping that alternately acts on the left and right pedals. Depending on the lowering force, the gears connected to the racks attached to the left and right pedals and the pinions of the unidirectional rotational force transmission structure attached to both sides of the rotational drive wheels are continuously connected to the rotational drive wheels. A linear / rotary power conversion mechanism that acts on the left and right pedals, and one of the left and right pedals that is linked to the one rack is used to depress the depression force when the pedal is depressed from the depression start position to the depression end position. A simplified pedal-type forward travel drive means comprising: a pedal position interlocking mechanism for returning the pedal from the step-down end position to the step-down start position while interlocking the other pedal with the corresponding rack; Based on this, the driver repeatedly uses the weight of the driver to the maximum and repeats the direct depressing action for the left and right pedals alternately using the linear / rotary power conversion mechanism using the rack and pinion mechanism. It can be converted into motion to easily obtain the forward rotation force of the bicycle body, and even in the case of a driver whose muscles in the thigh are weakened, the bicycle itself can run at low speed while reducing muscle fatigue. A bicycle capable of running can be realized and provided.

  According to the third aspect of the present invention, the left and right pinions of the one-way rotational force transmission structure attached on the both sides of the rotation drive wheel of the bicycle body in a coaxial arrangement with the shaft of the rotation drive wheel, Left and right racks respectively engaged with the respective pinions and supported by the bicycle main body so as to be vertically vertically movable together with the left and right pedals, and each pinion according to a depressing force acting alternately on the left and right pedals A linear / rotary power conversion mechanism that applies a continuous forward rotational force to the rotary drive wheels by gear coupling with each rack, and a U-shaped tube fixedly supported by a bicycle body below the rotary drive wheels; The U-shaped tubular body is inserted in a state of penetrating and protruding on both sides, one end side is connected to the left pedal, and the other end side is connected to the right pedal, Of the right pedal, one of the pedals linked to one rack moves in the U-shaped tube according to the depression force at the time of displacement from the depression start position to the depression end position, and the other pedal corresponds to the other pedal. A step-down type forward travel drive means comprising: a pedal position interlocking mechanism having a flexible and rigid step-down force transmitting body that is pushed up from the step-down end position to the step-down start position while interlocking with the rack; Based on the simplified configuration, the linear / rotary power conversion mechanism unit with a rack and pinion mechanism that repeats the direct stepping action on the left and right pedals alternately with the left and right feet using the driver's weight to the maximum In addition, the pedal position interlocking mechanism using the U-shaped tubular body and the step-down force transmitting body smoothly moves the position of the left and right pedals, and the forward rotation force of the bicycle body is increased. Realize and provide a bicycle that can be easily obtained and can run at a high speed as well as at a low speed while reducing muscle fatigue even in the case of a driver with weak thigh muscles. Can do.

  According to a fourth aspect of the present invention, in the bicycle according to the third aspect, the step-down force transmitting body is selected from a coil spring inserted through a U-shaped tubular body or a flexible / rigid rod-shaped body. As a configuration, a bicycle that can smoothly move the positions of the left and right pedals can be realized and provided.

  According to the fifth aspect of the present invention, in the bicycle according to the third or fourth aspect, by providing the rack constituting the linear / rotational power conversion mechanism and the cover body covering the outer peripheral region of the pinion, A bicycle that can also prevent or prevent dirt and scratches on clothes can be realized and provided.

  According to the sixth aspect of the present invention, the left and right pinions of the one-way rotational force transmission structure attached coaxially with the shaft body of the rotational drive wheel on both sides of the rotational drive wheel of the bicycle main body, and the both sides of the rotational drive wheel The left and right racks are respectively engaged with each pinion and connected to the left and right pedals by the bicycle body and supported so as to move up and down in an oblique direction along the main stay of the bicycle body. A linear / rotary power conversion mechanism that applies a continuous forward rotational force to the rotary drive wheel by a gear coupling between each pinion and each rack according to a stepping force acting on the rotary drive wheel, and above the rotary drive wheel An inverted U-shaped tube fixedly supported by the bicycle body in the same direction as the left and right racks, and being inserted through the inverted U-shaped tube so as to penetrate and protrude on both sides One end side is connected to the upper end of the one rack, and the other end side is connected to the upper end of the other rack, so that the depression start position of one pedal interlocking with the one rack is changed to the depression end position. A step-down force that slides in the inverted U-shaped tubular body with the movement of one rack according to the step-down force at the time of displacement, and pulls the other pedal from the step-down end position to the step-down start position while interlocking with the corresponding rack And a pedal position interlocking mechanism having a sliding transmission body. Repetitive direct stepping action on the left and right pedals is converted into rotational motion by a linear / rotary power conversion mechanism using a rack and pinion mechanism, and a reverse U-shaped tube and stepping force sliding transmission are used. Peda The position interlocking mechanism can smoothly move the position of the left and right pedals to easily obtain the forward rotational force of the bicycle body, and muscle fatigue even in the case of a driver whose thigh muscles are weakened Thus, it is possible to realize and provide a bicycle capable of running at a high speed as well as at a low speed.

  According to a seventh aspect of the present invention, in the bicycle according to the sixth aspect, the stepping force sliding transmission body is formed by a rope-shaped body made of metal or synthetic resin, and the left and right pedal positions are moved. Can realize and provide a bicycle that can be executed smoothly.

  According to an eighth aspect of the present invention, in the bicycle according to the sixth or seventh aspect, a group of rollers or bearings arranged side by side facing a sliding region of the step-down force sliding transmission body in the inverted U-shaped tubular body. Since a sliding friction reducing mechanism portion comprising a group or the like is further provided, it is possible to smoothly slide the stepping force sliding transmission body in the inverted U-shaped tubular body and smoothly move the position of the left and right pedals. Can realize and provide a bicycle that can.

  According to the ninth aspect of the present invention, the bicycle according to any one of the sixth to eighth aspects, further comprising a cover body that covers an outer peripheral region of the rack and pinion that constitute the linear / rotational power conversion mechanism. Therefore, it is possible to realize and provide a bicycle that can also protect the driver's feet, prevent the clothes from being stained and damaged.

FIG. 1 is a schematic side view of a bicycle according to Embodiment 1 of the present invention. FIG. 2 is a schematic perspective view of the bicycle according to the first embodiment when viewed from the front side of the front wheel. FIG. 3 is a schematic perspective view of the bicycle according to the first embodiment viewed from the rear side of the rear wheel. FIG. 4 is a schematic enlarged perspective view showing the step-down forward traveling drive means for the bicycle according to the first embodiment. FIG. 5 is a schematic explanatory view showing a state in which the left and right pedals are depressed in the pedal position interlocking mechanism constituting the pedal depression type forward travel drive means according to the first embodiment. FIG. 6 is a partially enlarged explanatory view of a step-down force transmission body in the pedal position interlocking mechanism portion constituting the step-down forward travel drive means for the bicycle according to the first embodiment. FIG. 7 is a schematic side view of the bicycle under the right pedal according to the second embodiment of the present invention. FIG. 8 is a schematic side view of the bicycle according to the second embodiment under the left pedal. FIG. 9 is a schematic perspective view showing a step-down forward travel drive means for a bicycle according to the second embodiment. FIG. 10 is a schematic perspective view showing a state where the rotary shaft body is removed in the step-down forward travel drive means for a bicycle according to the second embodiment. FIG. 11 is a schematic exploded perspective view showing a step-down forward travel drive means for a bicycle according to the second embodiment. FIG. 12 is a schematic exploded perspective view of a rotary shaft constituting the step-down forward travel drive means for a bicycle according to the second embodiment. FIG. 13 is a schematic partially enlarged perspective view showing an inverted U-shaped tubular body, a rope-shaped body, and a sliding friction reducing mechanism section that constitute a pedal position interlocking mechanism section of a step-down forward traveling drive means for a bicycle according to the second embodiment. is there.

  The present invention makes it possible to easily obtain the forward rotational force by repeating the direct stepping motion of the left and right foot alternately by making the maximum use of the driver's weight based on a simple configuration. Even in the case of a driver whose muscles are declining, the purpose of providing a bicycle that enables high-speed driving as well as low-speed driving of the bicycle itself while reducing muscle fatigue, A bicycle provided with rotating drive wheels disposed below the saddle and transmitting forward rotational force via a chain to the wheels of the bicycle body, disposed on the left and right sides of the rotating drive wheels, and being stepped on by both feet of the driver Left and right pedals that receive force alternately, racks that are attached to the left and right pedals according to the stepping force that alternately acts on the left and right pedals, and one-way rotational force transmission that is attached to both sides of the rotating drive wheels A linear / rotary power conversion mechanism that applies continuous forward rotational force to the rotary drive wheel by each gear coupling with a built-in pinion, and one of the left and right pedals that is linked to the one rack. A pedal position interlocking mechanism for returning from the step-down end position to the step-down start position while linking the other pedal with the corresponding rack using the step-down force at the time of displacement from the step-down start position to the step-down end position; This is realized by a configuration having a step-down forward travel drive means.

  Hereinafter, a bicycle according to an embodiment of the present invention will be described in detail with reference to the drawings.

Example 1
A bicycle 1 according to Embodiment 1 of the present invention will be described with reference to FIGS.

  In the bicycle 1 according to the first embodiment, a step-down type forward travel drive means 31 is disposed at the bottom of the bicycle body 2, and the bicycle body 2 is moved forward by a direct step-down force alternating between the left and right feet of the driver. It is a feature to have done.

The overall structure of the bicycle main body 2 will be briefly described. The bicycle main body 2 includes a saddle 3 on which a driver sits on the upper portion of the main stay 6 with respect to a frame portion including a top stay 5, a main stay 6, and a down stay 7. A saddle pillar 4 is attached, a handle 9 is attached to the upper side of the connecting portion of the top stay 5 and down stay 7 via a handle stem 8, and a front fork is attached to the lower side of the connecting portion of the top stay 5 and down stay 7. The front wheel 12 is rotatably supported by a front wheel shaft and a hub 11 provided at the end of the front fork 10.
In the drawing, the front fork 10 with a suspension mechanism is used, but the presence or absence of the suspension mechanism does not matter.

  A brake unit 13 is provided from the handle 9 to a required portion of the bicycle body 2 although a detailed structure is omitted.

  Further, a seat stay 14 is provided in an obliquely inclined arrangement from the upper part of the main stay 6 to the rear, a chain stay 15 is provided from the bottom side of the main stay 6 to the rear, and a rear wheel shaft 16 is provided at a connecting portion of these rear ends. The rear wheel 17 is rotatably supported by the rear wheel shaft 16.

A free hub 18 and a cassette sprocket 19 are connected to the rear wheel shaft 16 in a coaxial arrangement.
The hub mechanism for the rear wheel is not limited to the above-described form, and a combination of a normal hub and a free wheel, a hub gear incorporating a transmission, or the like may be used.

  And, at the bottom of the main stay 6, a step-down forward travel drive means 31, which is a main component of the present embodiment, is disposed, and between the step-down forward travel drive means 31 and the cassette sprocket 19. The chain 21 is hung with the speed increasing / decreasing device 20 interposed therebetween, and the forward rotational force generated by the step-down type forward travel drive means 31 is transmitted to the free hub 18 through the chain 21 to move the rear wheel 17 in the forward direction. The bicycle body 2 is configured to rotate and travel forward.

  Next, the step-down forward drive means 31 will be described in detail with reference to FIGS.

  The step-down type forward travel drive means 31 includes left and right pedals 32a and 32b that are alternately stepped down by the driver's left and right feet (mainly the heel part), and linear motion that acts on the pedals 32a and 32b. And a linear / rotary power conversion mechanism 33 that converts alternating stepping force into continuous rotational force, and the left and right pedals 32a and 32b alternately from the stepping start position according to the stepping force. And a pedal position interlocking mechanism 34 that moves to the stepping-down end position.

  The linear / rotational power conversion mechanism 33 includes a shaft body 35 disposed on the bottom of the main stay 6 in the same direction as the rear wheel shaft 16, and a rotary drive wheel (chain wheel) rotatably supported by the shaft body 35. 36 and a unidirectional rotational force transmission structure (coaxially mounted on both sides of the rotational drive wheel 36 with respect to the shaft body 35 (transmitting the rotational force to the shaft body only when each of the racks 38a, 38b is lowered, The left and right pinions 37a, 37b of a one-way clutch built-in structure that idles when the racks 38a, 38b are lifted, and the respective pinions 37a, 37b on both sides of the rotary drive wheel 36 are respectively engaged with the tooth portions and the lower ends thereof. The left and right pedals 32a and 32b are fixed to the base, and the bicycle body 2 can move vertically up and down together with the left and right pedals 32a and 32b at the bottom. Supporting the left and right rack 38a, and includes a 38b, a.

  Then, the racks 38a, 38b are alternately lowered according to the stepping force of the left and right feet of the driver that alternately act on the left and right pedals 32a, 32b, and the pinions 37a, 37b and the racks 38a, 38b are lowered. The pinions 37a and 37b are rotated by the gear coupling with the rotation drive wheel 36 so that a continuous forward rotational force is applied to the rotary drive wheel 36.

  As shown by an imaginary line in FIG. 4, the linear / rotational power conversion mechanism unit 33 covers the outer peripheral areas of the left and right pinions 37a and 37b, and the left and right racks 38a and 38b, and protects the driver's feet. A cover body 39 for preventing dirt and scratches can be added.

  The pedal position interlocking mechanism 34 includes a U-shaped tube 41 fixedly supported by the bicycle body 2 below the rotary drive wheel 36, and an enlarged U-shaped tube as shown in FIGS. 41, a stepping-force transmission body 42 having flexibility and rigidity that is inserted in a state of penetrating and projecting on both sides.

  5 shows a state in which the left pedal 32a is in the depression start position and the right pedal 32b is in the depression end position, and the lower part in FIG. 5 shows the right pedal in the depression end position. Each of the states 32b is in the step-down start position.

  The step-down force transmission body 42 has one end connected to the left pedal 32a and the other end connected to the right pedal 32b. Of the left and right pedals 32a and 32b, for example, the left rack 38a. The left pedal 32a moves in the U-shaped tubular body 41 according to the depression force when the left pedal 32a is displaced from the depression start position to the depression end position. At this time, the right pedal 32b is moved to the right rack 38b. For example, on the contrary, for example, the depression force at the time of displacement from the depression start position to the depression end position of the right pedal 32b linked to the right rack 38b is pushed up from the depression end position to the depression start position. Accordingly, it moves in the U-shaped tubular body 41, and at this time, the left pedal 32a is pushed up from the step-down end position to the step-down start position while interlocking with the left rack 38a.

  As the step-down force transmitting body 42, for example, as shown in FIG. 6, a circular hollow tube 43 made of, for example, a synthetic resin that slides inside the U-shaped tube body 41, and both ends inside the circular hollow tube 43, respectively. A pair of rigid bodies 44 having rigidity, for example, round rods, and a predetermined elastic force disposed in the circular hollow tube 43 and having both ends thereof in contact with the inner bottom portions of the pair of massive bodies 44 And a coil spring 45 having a rigidity capable of withstanding a step-down force acting on the pedals 32a and 32b and having flexibility so as to be able to move in a bent state in the circular hollow tube 43, and the pair of blocks 44. A pair of attachments 46 for attaching the built-in both ends to the left and right pedals 32a and 32b are provided.

  In addition, the step-down force transmitting body 42 has a rigidity that can withstand the step-down force acting on the pedals 32a and 32b, and is a flexible metal that can move in a bent state in the circular hollow tube 43. It can also be configured using a rod-like body such as a rod.

  Next, the operation and effect of the bicycle 1 according to the first embodiment will be described mainly with respect to the operation of the step-down forward travel drive means 31.

  In the bicycle 1 according to the first embodiment, the driver sits on the saddle 3 and places the heel portions of the left and right feet on the left and right pedals 32a and 32b.

  Then, the driver applies the maximum weight of the driver to the heel portion of the left foot, for example, from the state where the left pedal 32a shown in the upper part of FIG. The left pedal 32a is depressed so that the left pedal 32a shown in FIG.

  At this time, the left rack 38a interlocked with the left pedal 32a is also lowered to the stepped-down end position while rotating the left pinion 37a.

  As a result, the rotary drive wheel 36 also rotates forward together with the left pinion 37a.

  Further, as the left pedal 32a is lowered from the stepping start position to the stepping end position, the stepping force transmission body 42 in the pedal position interlocking mechanism unit 34 responds to the stepping force by the left pedal 32a. It moves within the U-shaped tubular body 41, interlocks the right pedal 32b with the right rack 38b, and pushes up the pinion 37b from the step-down end position to the step-down start position while idling. This state is shown in the lower part of FIG.

  Next, contrary to the case described above, the driver puts his / her weight on his / her right foot and maximizes his / her own weight so that the right pedal 32b is in the depression start position. The right pedal 32b is depressed so that the right pedal 32b reaches the depression end position.

  At this time, the right rack 38b interlocked with the right pedal 32b is also lowered to the stepped-down end position while rotating the right pinion 37b.

  As a result, the rotary drive wheel 36 also rotates forward together with the right pinion 37b.

  Further, as the right pedal 32b is lowered from the depression start position to the depression completion position, the depression force transmission body 42 in the pedal position interlocking mechanism unit 34 responds to the depression force by the right pedal 32b. It moves in the U-shaped tubular body 41, interlocks the left pedal 32a with the left rack 38a, and pushes up the pinion 37a from the step-down end position to the step-down start position while idling.

  By repeating the stepping motion of the left and right feet of the driver alternately, the forward rotational force by the left pinion 37a and the right pinion 37b acts on the rotational drive wheel 36. The forward rotational force is transmitted from the chain 21 to the cassette sprocket 19 and the free hub 18, and the rear wheel 17 rotates forward in accordance with the stepping motion of the left and right feet of the driver to obtain a desired forward traveling force and advance the bicycle body 2. Let it run.

  In the bicycle 1 according to the first embodiment described above, the left and right foot heel portions of the driver are used as the left and right pedals 32a and 32b on the basis of the configuration in which the step-down forward traveling drive means 31 having a simple configuration is adopted. By putting the weight on the left and right pedals 32a and 32b through the left and right feet as much as possible and repeating the direct step-down operation alternately with the left and right feet, The driver can obtain the desired forward rotational force by making the most of his body weight, and the bicycle itself can run at low speed while reducing thigh muscle fatigue even in the case of a driver with weak thigh muscles. Of course, high-speed running is also possible.

  In this case, in the case of a conventional bicycle, the driver's weight was only about 60% to 70% of effective use, but in the bicycle 1 according to the first embodiment, 100% of the weight was effective. This makes it possible to obtain a desired traveling speed while reducing muscle fatigue in the thigh.

(Example 2)
A bicycle 1A according to Embodiment 2 of the present invention will be described with reference to FIGS.

  In addition, in the bicycle 1A according to the second embodiment, the same elements as those of the bicycle 1 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The basic configuration of the bicycle 1A according to the second embodiment is substantially the same as that of the bicycle 1 according to the first embodiment, but a step-down forward traveling having a different configuration from that of the first embodiment is provided at the bottom of the bicycle body 2. The driving means 51 is disposed, and the bicycle main body 2 is caused to travel forward by the direct stepping force alternately alternating between the left and right feet of the driver.

  Therefore, in the second embodiment, the configuration of the step-down forward travel drive means 51 will be mainly described.

  The step-down forward drive means 51 includes left and right pedals 32a and 32b that can be stepped down alternately and linearly by the driver's left and right feet (mainly the heel part),

  A linear / rotary power conversion mechanism 52 that is a direct acting type that acts on the pedals 32a and 32b and that converts alternating stepping force into continuous rotational force;

  A pedal position interlocking mechanism unit 53 that alternately moves the left and right pedals 32a and 32b from the stepping start position to the stepping end position according to the stepping force;

  The linear / rotational power conversion mechanism 52 has a cover body 54 as shown in FIGS. 9 to 11 that covers an outer peripheral region that occupies the front side of the bicycle body 2 and is fixedly supported by the bicycle body 2. Yes.

  7 and 8, the cover body 54 is not shown.

  Since the bicycle 1A according to the second embodiment includes the chain cover 91, elements covered by the chain cover 91 are not shown in FIGS.

  The linear / rotational power conversion mechanism 52 is a one-way rotational force transmission that is attached to both sides of a rotational drive wheel 71 similar to the rotational drive wheel 36 of the bicycle body 2 in a coaxial arrangement with the shaft body 72 of the rotational drive wheel 71. Left and right pinions 55a, 55b of a structure (for example, a one-way clutch built-in structure that transmits rotational force to the shaft body 62 only when the racks 56a, 56b are lowered, and idles when the racks 56a, 56b described later are raised), Left and right racks 56a and 56b that are respectively meshed with the respective pinions on both sides of the rotary drive wheel and supported by the bicycle body so as to be movable up and down in an oblique direction along the main stay 6 of the bicycle body together with the left and right pedals 32a and 32b. The left and right racks 56a and 56b are alternately lowered according to the stepping force acting alternately on the left and right pedals 32a and 32b. Is, the pinions 55a, 55b and the rack 56a, the pinion 55a by the gear coupling with 56b, rotate the 55b, are configured to exert a continuous advancement rotational force to the rotary drive wheel 71.

  The pedals 32a and 32b are fixed to the lower ends of the left and right racks 56a and 56b, respectively, by means of attachments 58.

  As shown in FIGS. 9 to 11, the cover body 54 is made of, for example, a synthetic resin plate, occupies the front side of the bicycle body 2, and covers a front plate 59 that covers the front areas of the left and right racks 56a and 56b. Left and right side plates 60a and 60b integrally formed on both sides of the plate 59 are provided.

  The front plate 59 is provided with a downward U-shaped recess 59a formed at the center thereof so as not to contact the top stay 5 and the main stay 6.

  The left and right side plates 60a and 60b are bent from both sides of the front plate 59 toward the rear of the bicycle body 2, and the left and right side plates 60a and 60b are connected to the left and right pinions 55a and 55b. It covers so as to cover the area.

  Thus, the outer peripheral regions of the left and right pinions 55a and 55b and the left and right racks 56a and 56b are covered to prevent the driver's feet from being protected and the clothes dirty and damaged.

  Further, rack movement auxiliary bodies 61a and 61b are fixed to the inner surface of the front plate 59 of the cover body 54 by using fixing screws 62 in an arrangement corresponding to the left and right racks 56a and 56b.

  The rack movement auxiliary bodies 61a and 61b are formed by fixing the right and left base bodies 63a and 63b, which are U-shaped in cross section and opened on the left and right racks 56a and 56b side, to the front plate 59 of the cover body 54 using fixing screws 62, respectively. In addition to being attached to the inner surface, a large number of rollers 64 are rotatably arranged in the openings of the bases 63a and 63b, and these rollers 64 are arranged on the back side of the left and right racks 56a and 56b (surfaces on which no teeth are provided). The left and right racks 56a and 56b are arranged so as to be in sliding contact with each other so as to facilitate the lowering and raising operations of the left and right racks 56a and 56b.

  The shaft 72 of the rotary drive wheel 71 will be described with reference to FIG.

  The shaft body 72 includes a shaft main body 73 disposed at the center of the rotary drive wheel 71, a latch that can take a square hole 74a and a pinion 55a or a pinion 55b fitted into a rectangular tube-shaped protrusion 73a provided on the shaft main body 73. A pair of left and right connecting bodies 74 and 74 each having a projecting protrusion 74b are provided.

  Next, the pedal position interlocking mechanism 53 will be described with reference to FIGS. 9 to 11 and FIG.

  The pedal position interlocking mechanism 53 includes an inverted U-shaped tubular body (downward U-shaped tubular body) 81 fixedly supported by the bicycle main body 2 in the same direction as the left and right racks 56a, 56b above the rotational driving wheel 71, The reverse U-shaped tubular body 81 is inserted in a state of penetrating and projecting on both sides, and one end side is connected to the upper end of the left rack 56a via the end connecting body 83, and the other end side is connected. Is connected to the upper end of the right rack 56b via the end connecting body 83, and the left pedal 32a interlocking with the left rack 56a is stepped down when displaced from the stepping start position to the stepping end position. As the right rack 56b moves in response to the force, it slides in the inverted U-shaped tubular body 81, and the right pedal 32b is interlocked with the corresponding right rack 56b to raise the step from the step-down end position to the step-down start position. Lowering force sliding transmission It is equipped with 82.

  The stepping force sliding transmission body 82 is constituted by a rope-like body (wire lobe, synthetic resin rope, cloth rope, etc.) made of, for example, metal, synthetic resin, or cloth.

  9 to 11, reference numeral 84 denotes an end receiving ring disposed at the opening of the inverted U-shaped tubular body 81.

  The inverted U-shaped tubular body 81 further includes a sliding friction reducing mechanism 85 including a roller group 86 arranged in line with the sliding area of the step-down force sliding transmission body.

  That is, the lower thick portion of the inverted U-shaped curved portion of the inverted U-shaped tubular body 81 is notched so as to exhibit an inverted U shape over a certain range, and this notched portion is shown in FIGS. 9 to 11 and 13. As described above, the pair of inverted U-shaped roller mounting plates 87 are mounted in a parallel arrangement.

  A large number of rollers 86a are rotatably supported between the pair of reverse U-shaped roller mounting plates 87 so as to be in a reverse U-shaped arrangement as a whole in a parallel arrangement at a constant interval.

  With such a configuration of the sliding friction reducing mechanism 85, the stepping force sliding transmission body 82 reciprocates in the reverse U-shaped tubular body 81 and slides in response to alternate stepping operations of the left and right pedals 32a and 32b. When moving, the outer periphery of the stepping force sliding transmission body 82 comes into contact with the outer periphery of a large number of rollers 86a, and the stepping force sliding transmission body 82 slides directly in the inverted U-shaped tubular body 81. Compared to the case where the stepping force, the sliding frictional force of the stepping force sliding transmission body 82 is reduced, and the alternate stepping down operation of the left and right pedals 32a, 32b can be facilitated.

  The sliding friction reducing mechanism 85 may employ a configuration in which a large number of bearings are arranged in an inverted U-shaped arrangement in addition to the configuration using a large number of rollers 86a.

  Next, the operation and effect of the bicycle 1A according to the second embodiment will be described mainly with respect to the operation of the step-down forward travel drive means 51.

  In the bicycle 1A according to the second embodiment, the driver sits on the saddle 3 and places the heel portions of the left and right feet on the left and right pedals 32a and 32b.

  Then, the driver uses the weight of his / her own to the maximum and puts it on the heel part of the left foot, and from the state where the left pedal 32a is in the stepping start position, the left pedal 32a is finished being stepped down. The left pedal 32a is depressed to reach the position.

  At this time, the left rack 56a interlocked with the left pedal 32a is also lowered to the stepped-down end position while rotating the left pinion 55a.

  As a result, the left pinion 55a rotates and the rotary drive wheel 71 also rotates forward together with the left pinion 55a.

  Further, as the left pedal 32a is lowered from the depression start position to the depression end position, the depression force sliding transmission body 82 in the pedal position interlocking mechanism portion 53 slides in the inverted U-shaped tubular body 81. Then, the right pedal 32b is interlocked with the corresponding right rack 56b, and the right pinion 55b is idled and lifted from the step-down end position to the step-down start position.

  In this case, when the stepping force sliding transmission body 82 in the sliding friction reducing mechanism 85 slides in the inverted U-shaped tubular body 81, the outer periphery of the stepping force sliding transmission body 82 has a large number of rollers 86a. Since the sliding frictional force is reduced, the left pedal 32a can be smoothly depressed.

  Further, the rack movement auxiliary bodies 61a and 61b can facilitate the lowering operation of the left rack 56a and the rising operation of the right rack 56b.

  Next, contrary to the case described above, the driver puts his / her weight on his / her right foot and maximizes his / her own weight so that the right pedal 32b is in the depression start position. The right pedal 32b is depressed so that the right pedal 32b reaches the depression end position.

  At this time, the right rack 38b interlocked with the right pedal 32b is also lowered to the stepped-down end position while rotating the right pinion 37b.

  As a result, the right pinion 55b rotates and the rotary drive wheel 71 also rotates forward together with the right pinion 55b.

  Further, as the right pedal 32 b is lowered from the depression start position to the depression completion position, the depression force sliding transmission body 82 in the pedal position interlocking mechanism portion 53 slides in the inverted U-shaped tubular body 81. Then, the left pedal 32a is interlocked with the corresponding left rack 56a, and the left pinion 55a is idled and lifted from the step-down end position to the step-down start position.

  In this case, when the stepping force sliding transmission body 82 in the sliding friction reducing mechanism 85 slides in the inverted U-shaped tubular body 81, the outer periphery of the stepping force sliding transmission body 82 has a large number of rollers 86a. Since the sliding frictional force is reduced, the stepping-down operation of the right pedal 32b can be facilitated.

  Further, the rack movement auxiliary bodies 61a and 61b can facilitate the lowering operation of the right rack 56b and the rising operation of the left rack 56a.

  By alternately repeating the stepping motion of the left and right feet of the driver, the forward driving force by the left pinion 55a and the right pinion 55b acts on the rotary drive wheel 71. The forward rotational force is transmitted from the chain 21 to the rear wheel free wheel 92, and the rear wheel 17 rotates forward in accordance with the stepping motion of the left and right feet of the driver to obtain a desired forward traveling force and advance the bicycle body 2. Let it run.

  In the bicycle 1A according to the second embodiment described above, the left and right foot heel portions of the driver are used as the left and right pedals 32a and 32b on the basis of the configuration in which the step-down forward traveling drive means 51 having a simplified configuration is adopted. Example 1 is carried out by repeating the direct step-down operation of alternating left and right feet by placing it on the left and right pedals 32a and 32b through the left and right feet as much as possible using the maximum weight. As in the case of, the driver's weight can be maximized to obtain the desired forward rotational force, and even in the case of a driver whose thigh muscle is weakened, the thigh muscle fatigue is reduced. While reducing the speed, the bicycle itself can run at a low speed as well as at a low speed.

  Also in the bicycle 1A according to the second embodiment, the driver can effectively use 100% of the weight, and can obtain a desired running speed while reducing muscle fatigue of the thigh. Is the same as in the first embodiment.

  The structure of the step-down forward travel drive means in the bicycle of the present invention is for a leg muscle training bicycle in a sports gym etc. Widely applicable.

DESCRIPTION OF SYMBOLS 1 Bicycle 1A Bicycle 2 Bicycle body 3 Saddle 4 Saddle pillar 5 Top stay 6 Main stay 7 Down stay 8 Handle stem 9 Handle 10 Front fork 11 Hub 12 Front wheel 13 Brake unit 14 Seat stay 15 Chain stay 16 Rear wheel shaft 17 Rear wheel 18 Free hub 19 Cassette sprocket 20 Booster / Decelerator 21 Chain 31 Step-down forward travel drive means 32a Pedal 32b Pedal 33 Linear / rotational power conversion mechanism 34 Pedal position interlocking mechanism 35 Shaft body 36 Rotating drive wheel 37a Pinion 37b Pinion 38a Rack 38b Rack 39 Cover body 41 U-shaped tube body 42 Stepping-down force transmitting body 43 Circular hollow tube 44 Lumped body 45 Coil spring 46 Mounting tool 51 Step-down type forward travel drive means 52 Linear / rotation Force conversion mechanism 53 Pedal position interlocking mechanism 54 Cover body 55a Pinion 55b Pinion 56a Rack 56b Rack 58 Mounting tool 59 Front plate 59a Recess 60a Side plate 60b Side plate 61a Rack movement auxiliary body 61b Rack movement auxiliary body 62 Fixing screw 62 Shaft body 63a Base body 63b Base body 64 Roller 71 Rotation drive wheel 72 Shaft body 73 Shaft body 73a Square cylindrical projection 74 Connection body 74a Square hole 74b Latch projection 81 Reverse U-shaped pipe body 82 Step-down force sliding transmission body 83 End Coupling Body 84 End Ring Ring 85 Sliding Friction Reduction Mechanism Part 86 Roller Group 86a Roller 87 Roller Mounting Plate 91 Chain Cover 92 Free Wheel

Claims (9)

A bicycle having a bicycle body and a rotational drive wheel disposed below the saddle of the bicycle body and transmitting forward rotational force to a wheel of the bicycle body via a chain,
Left and right pedals that are disposed on both the left and right sides of the rotating drive wheel and alternately receive the step-down force by both feet of the driver;
A linear / rotary power conversion mechanism that causes a continuous forward rotational force to act on the rotary drive wheel in accordance with the step-down force acting alternately on the left and right pedals;
Among the left and right pedals, a pedal position for returning the other pedal from the depression end position to the depression start position using the depression force at the time of displacement from the depression start position of one pedal to the depression end position Interlocking mechanism,
A bicycle characterized by having a step-down forward travel drive means comprising: A bicycle having a bicycle body and a rotational drive wheel disposed below the saddle of the bicycle body and transmitting forward rotational force to a wheel of the bicycle body via a chain,
Left and right pedals that are disposed on both the left and right sides of the rotating drive wheel and alternately receive the step-down force by both feet of the driver;
According to each gear coupling between the racks attached to the left and right pedals and the pinions of the one-way rotational force transmission structure attached to both sides of the rotary drive wheel according to the depression force acting alternately on the left and right pedals, A linear / rotary power conversion mechanism that applies continuous forward rotational force to the rotational drive wheels;
Of the left and right pedals, one pedal that is linked to the one rack is depressed while the other pedal is linked to the corresponding rack using the depression force at the time of displacement from the depression start position to the depression end position. A pedal position interlocking mechanism for returning from the lowering end position to the stepping start position;
A bicycle characterized by having a step-down forward travel drive means comprising: A bicycle having a bicycle body and a rotational drive wheel disposed below the saddle of the bicycle body and transmitting forward rotational force to a wheel of the bicycle body via a chain,
Left and right pedals that are disposed on both the left and right sides of the rotating drive wheel and alternately receive the step-down force by both feet of the driver;
Left and right pinions of a unidirectional rotational force transmission structure attached to both sides of the rotary drive wheels in a coaxial arrangement with the shaft of the rotary drive wheels, and meshed with the respective pinions on both sides of the rotary drive wheels and Left and right racks that are supported so as to be vertically movable up and down together with the pedals, and the rotational drive wheels by means of a gear coupling between each pinion and each rack in response to a step-down force acting alternately on the left and right pedals A linear / rotary power conversion mechanism that applies continuous forward rotational force to
A U-shaped tubular body fixedly supported by the bicycle body below the rotary drive wheel, and a U-shaped tubular body that is inserted through the U-shaped tubular body in a state of penetrating and projecting on both sides. The other end side is connected to the right pedal, and one of the left and right pedals that is linked to the one rack is depressed when the pedal is depressed from the depression start position to the depression end position. A stepping force transmission body having flexibility and rigidity that moves in the U-shaped tube according to the lowering force and pushes the other pedal from the stepping end position to the stepping start position while interlocking with the corresponding rack; A pedal position interlocking mechanism section;
A bicycle characterized by having a step-down forward travel drive means comprising:   4. The bicycle according to claim 3, wherein the step-down force transmission body comprises a coil spring inserted through a U-shaped tube or a rod-shaped body having flexibility and rigidity.   The bicycle according to claim 3 or 4, further comprising a cover body that covers an outer peripheral area of the rack and pinion constituting the linear / rotational power conversion mechanism. A bicycle having a bicycle body and a rotational drive wheel disposed below the saddle of the bicycle body and transmitting forward rotational force to a wheel of the bicycle body via a chain,
Left and right pedals that are disposed on both the left and right sides of the rotating drive wheel and alternately receive the step-down force by both feet of the driver;
Left and right pinions of a unidirectional rotational force transmission structure attached to both sides of the rotary drive wheels in a coaxial arrangement with the shaft of the rotary drive wheels, and meshed with the respective pinions on both sides of the rotary drive wheels and The left and right racks are connected to each other and supported so as to move up and down in an oblique direction along the main stay of the bicycle body, and each pinion according to the depressing force acting alternately on the left and right pedals A linear / rotary power conversion mechanism that applies a continuous forward rotational force to the rotary drive wheel by gear coupling with each rack;
An inverted U-shaped tubular body fixedly supported in the same direction as the left and right racks by the bicycle main body above the rotating drive wheel, and inserted through the inverted U-shaped tubular body in a state of penetrating and projecting on both sides. In addition, one end side is connected to the upper end of the one rack and the other end side is connected to the upper end of the other rack, so that the depression start position of one pedal interlocking with the one rack is changed to the depression end position. When the one rack moves according to the depressing force at the time of displacement, the reverse U-shaped tubular body slides, and the other pedal is moved from the depressing end position to the depressing start position while interlocking with the corresponding rack. A pedal position interlocking mechanism having a force-sliding transmission body;
A bicycle characterized by having a step-down forward travel drive means comprising:   7. The bicycle according to claim 6, wherein the stepping force sliding transmission body is formed of a rope-like body made of metal or synthetic resin.   The sliding friction reduction mechanism part which consists of a roller group or a bearing group etc. which were arranged facing the sliding area of the step-down force sliding transmission body in the inverted U-shaped tubular body is provided. 6. The bicycle according to 6 or 7.   The bicycle according to any one of claims 6 to 8, further comprising a cover body that covers an outer peripheral area of the rack and pinion that constitute the linear / rotational power conversion mechanism.

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