JP2017143890A - Rotary drive device for efficiently transmitting twist of rubber string - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in which a rotating body rotated by twist of a rubber string is pulled to the rubber string side because the rubber string is connected to one of the left and right of the rotating body, and therefore the rotating body comes in contact with a bearing material for supporting the rotating body and the rotary efficiency is decreased by the friction.SOLUTION: A left pulley 11a and a right pulley 11b are connected to both sides of a center pulley 1 through rubber strings 3a, 3b. When a rotating handle 10 is rotated, the left pulley 11a and the right pulley 11b are rotated through a left drive pulley 13a and a right drive pulley 13b, and the rotational force is accumulated in the center pulley 1. Then, the rubber strings 3a and 3b have the same thickness and length, so that the center pulley 1 is always held in a central position.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a rotary drive device that uses a twist of a rubber string as a power source, and is used for, for example, a model of a car, a windmill, a ferris wheel, or a toy.

  In a toy that twists a rubber string and rotates a rotating body, conventionally, one end of one rubber string is connected to the rotating body, and the other end is rotated to twist the rubber string (for example, patents). Reference 1). If the rubber string is continuously twisted, the rotating body is pulled toward the rubber string, and the friction between the rotating body and the bearing material that supports the shaft of the rotating body increases, and when the rotating body is rotated, the rotation efficiency is increased by the friction. There was a problem of falling.

JP 2005-185791 A

  Conventionally, in a toy that uses torsion of a rubber string as a power source, a method of rotating the rotating body by twisting a rubber string hung on one hook of the rotating body has been used. According to this method, if the rubber string is twisted while the rotating body is temporarily stopped, the rotating body is strongly pulled toward the rubber string, and a large friction is generated between the rotating member and the bearing member that supports the rotating body. When rotating the rotating body, the rotation efficiency decreased. An object of the present invention is to solve the above-described problem of reduction in rotational efficiency.

A method for improving the rotational efficiency by twisting the rubber string will be described below with reference to the drawings.
FIG. 1 is a conceptual diagram in the case where the central pulley 1 is turned and the left and right rubber strings with the other ends fixed are twisted. In FIG. 1, one end of the left rubber cord 3a is hung on one of the left and right left hooks of the central pulley 1 having left and right hooks, and one end of the right rubber cord 3b is hung on the other right hook. The other end portions of the rubber cord 3a and the right rubber cord 3b are fixed to the left fixing member 12a and the right fixing member 12b, respectively. The left elastic cord 3a and the right elastic cord 3b are equal in length and thickness.

  The left rotating body 7a is fixed to one of the left and right ends of the rotating shaft 6, the right rotating body 7b is fixed to the other, and the rotating pulley 5 is fixed to the center. The left and right rotating bodies correspond to wheels in the case of a traveling vehicle, for example. The rotary pulley 5 and the central pulley 1 are connected by a central transmission belt 4 so that the rotational force is transmitted between the rotary pulley 5 and the central pulley 1.

  By rotating the left rotating body 7a and the right rotating body 7b in the X direction shown in FIG. 1a, the rotational force is transmitted to the central pulley 1 through the rotating pulley 5 and the central transmission belt 4, and the left rubber cord 3a. And the right rubber string 3b are twisted simultaneously and in the same way. When the rotary shaft 6 is rotated in the X direction, it does not return in the reverse Y direction.

  When the left and right rubber strings are twisted and then the rotation shaft can be rotated in the Y direction as shown in FIG. 1b, the twists of the rubber strings 3a and 3b are returned and the central pulley 1 is rotated in the Y direction. Is transmitted to the rotation pulley 5, and the rotating bodies 7a and 7b rotate in the Y direction. For example, when the rotating bodies 7a and 7b are vehicle wheels, the vehicle starts to travel.

  FIG. 2 is a conceptual diagram when the central pulley 1 is rotated and the left and right rubber strings having rotating bodies at the ends are twisted. In FIG. 2, the other ends of the left rubber cord 3a and the right rubber cord 3b are respectively hooked on the hooks of the left rotating body 7a and the right rotating body 7b. These rotating bodies correspond to wheels in the case of a traveling vehicle, for example.

  A central drive pulley 9 is installed on the drive shaft 8 and is connected to the central pulley 1 by the central transmission belt 4 so that the rotational force of the central drive pulley 9 is transmitted to the central pulley 1. It has become. The drive shaft 8 has a crank-shaped rotary handle 10 at one end thereof.

  As shown in FIG. 2a, by temporarily stopping the left rotating body 7a and the right rotating body 7b (see white arrows) and turning the rotating handle 10 in the X direction, the central drive pulley 9 and the center As shown in FIG. 2b, the rotational force in the X direction is transmitted to the central pulley 1 through the transmission bell 4, the left and right rubber strings 3a and 3b are twisted, and the twisting is completed. When the left and right rotating bodies 7a and 7b are unfastened and allowed to rotate, the left and right rotating bodies 7a and 7b start to rotate in the X direction. Here, the rotary shaft 8 or the central drive pulley 9 is not rotated in the Y direction.

  FIG. 3 is a conceptual diagram when the central pulley 1 is fixed and the left and right rubber strings are twisted. In FIG. 3, the other ends of the left rubber cord 3a and the right rubber cord 3b with one end hung on the hook of the central pulley 1 are hung on the hooks of the left pulley 11a and the right pulley 11b, respectively. It has been. The left pulley 11a and the right pulley 11b have the same diameter.

  The drive shaft 8 has a left drive pulley 13a fixed to one of its left and right ends, a right drive pulley 13b fixed to the other, and a crank-shaped rotary handle 10 at one end thereof. The left drive pulley 13a and the right drive pulley 13b have the same diameter.

  As shown in FIG. 3a, when the central pulley 1 is temporarily stopped (see the white arrow), the left driving pulley 13a and the right driving pulley 13b are rotated in the X direction by the rotary handle 10. Rotational force is transmitted to the left pulley 11a and the right pulley 11b via the left transmission belt 14a and the right transmission belt 14b, and the left rubber cord 3a and the right rubber cord 3b are twisted simultaneously and identically. The rotational force in the X direction is accumulated in the stopped central pulley 1. Since the central pulley 1 always receives an equal tensile force from the left and right, even when the rubber string is strongly twisted, the central pulley 1 does not move to the left and right. Usually, the rotational force in the X direction accumulated in the central pulley 1 is used as a power source for various toy rotating bodies such as wheels, as shown in FIG. Here, the rotating shaft 8 is not rotated in the Y direction.

  In the case of the three examples shown in FIGS. 1, 2, and 3, the configuration of the pulley, the rubber cord, the rotating body, etc. is different, but the central pulley 1 has the left and right rubber straps 3a, 3b. At the same time, they are pulled with the same tensile force, do not move to the left and right, and do not contact the bearing material or the like that supports the central pulley 1. Therefore, there is no friction with the bearing material that occurs when the rubber string is twisted from one side of the prior art, and the rotational efficiency is improved.

It is a conceptual diagram in the case of turning the central pulley and twisting the left and right rubber strings with the ends fixed. It is a conceptual diagram in the case of turning the central pulley and twisting the left and right rubber strings having rotating bodies at the ends. It is a conceptual diagram when the center pulley is stopped and the left and right rubber strings are twisted. It is a top view of the 1st traveling vehicle. It is a side view at the time of driving | running | working of a 1st driving | running | working vehicle and twisting a rubber string. It is explanatory drawing of the side and front of the rear wheel of a 1st traveling vehicle. It is explanatory drawing of the rotation control apparatus at the time of the stop of a 1st traveling vehicle, and advancing. It is a top view of the 2nd traveling vehicle. It is a side view of the 2nd traveling vehicle. It is a top view of a 3rd traveling vehicle. It is a side view of a 3rd traveling vehicle. Explanatory drawing of rotating handle when rotating clockwise and counterclockwise

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  Example 1 By turning the central pulley 1, the left rubber cord 3a and the right rubber cord 3b to which the ends are fixed are twisted, and the return reaction force of the twisted rubber cord is used as the power source of the rotating body. FIG. 4 shows a plane of the traveling vehicle, and FIG. 5 shows a side view thereof.

  The left and right left frame center and the other frame center of the rectangular frame-shaped main body frame 30 are connected and fixed by a horizontal partition member 31, and the front and rear rear frame portions of the main body frame 30 and the horizontal partition member 31 are fixed. Bearing materials 2a and 2b are fixed.

  A rotating shaft 21 is rotatably inserted into the left frame portion and the right frame portion in front of the main body frame 30, and a left front wheel 32a is fixed to one end of the rotating shaft 21, and a right front wheel 32b is fixed to the other. The rotary pulley 22 is fixed. Sandpaper is attached to the outer peripheral surfaces of the left front wheel 32a and the right front wheel 32b to prevent slippage with the road surface. A rotation control device 23 that controls the rotation direction and operation / stop of the rotation shaft 21 is provided at the center of the rotation shaft 21.

  A rear wheel shaft 33 that passes through the bearing members 2a and 2b from the outside of the left frame portion behind the main body frame 30 to the outside of the right frame portion of the main body frame 30 is rotatably attached. The folded portion of the left U-shaped bearing member 35a is fixed to one of the left and right ends of both ends, and the folded portion of the right U-shaped bearing member 35b is fixed to the other, and the opening of each U-shaped bearing member 35a, 35b is fixed. The left rear wheel 34a and the right rear wheel 34b are rotatably held.

  The center pulley 1 is supported by the bearing material 2a and the bearing material 2b, one end of the left rubber cord 3a is hung on one of the left and right hooks of the center pulley 1, and the right rubber cord 3b is hooked on the other hook. One end is hung, and the other ends of the left rubber cord 3a and the right rubber cord 3b are fixed to the left frame portion and the right frame portion of the main body frame 30, respectively.

  The central pulley 1 and the rotary pulley 22 are connected by a transmission belt 24 in which a plurality of thin strings are individually hung. Sandpaper is attached to the surfaces of the central pulley 1 and the rotary pulley 22 to prevent the transmission belt 24 from slipping.

  When the front wheels 32 a and 32 b are pressed against the road surface and rotated in the reverse direction (see arrow Z in FIG. 5 b) (see arrow Y in FIG. 5 b), the center via the rotating pulley 22 and the transmission belt 24. The pulley 1 is turned and simultaneously the left and right rubber strings 3a and 3b are twisted. Even if the front wheels 32a and 32b are separated from the road surface and the vehicle is returned to the original position, the rotation control device 23 prevents reverse rotation of the rotating shaft 21 (see arrow X in FIG. 7a) as shown in FIG. 7a. The twist of the rubber cords 3a and 3b does not return. By repeating this operation, the left and right rubber strings 3a and 3b are twisted to a predetermined level.

  In the embodiment, in the twisting process of the rubber straps 3a and 3b, in the embodiment, the diameter of the outer edge of the central pulley 1 is made the same as that of the left and right front wheels 32a and 32b, and the left and right front wheels are pressed against the road surface in the reverse direction When it is rotated (see the arrow in FIG. 5b), the outer edge of the central pulley 1 is also in contact with the road surface at the same time, and the rubber strings 3a and 3b are twisted. This is because the traveling vehicle at the time of traveling is supported by the left and right front wheels and the rear wheels as shown in FIG. 5a, while the traveling vehicle is pressed against the road surface as shown in FIG. 5b. 34a and 34b lose support and are supported by the left and right front wheels and the outer edge of the central pulley 1.

  FIG. 6a shows the side of the rear wheel, and FIG. 6b shows the front of the left and right rear wheels. A protruding rod 36 is fixed to the central portion of the rear wheel shaft 33. One end of a rubber cord 37 is hung on the upper end of the protruding bar 36, and the other end is fixed to the rear frame portion of the main body frame 30, and is pulled by the rubber cord 37 when traveling on the vehicle, but is restricted by the stop plate 38. Therefore, as shown in FIG. 5a, the left and right rear wheels are maintained substantially vertical. When the traveling vehicle is pressed against the road surface, the rubber strap 37 is further extended, and the left and right rear wheels are inclined as shown in FIG.

  7a and 7b are explanatory views of the operation of the rotation control device 23. FIG. 7a shows a state when the vehicle is stopped, and FIG. 7b shows a state when the vehicle is moving.

  7a and 7b, the front end of the L-shaped horizontal member 39b with lead weight at the front end is held on the front wheel shaft 21, and the rear end is connected to the front frame portion of the main body frame 30. A hinge is fixed to the shape bearing member 39c. A handle bar 39d is vertically fixed to the L-shaped horizontal member 39b.

  When the handle bar 39d is vertical, as shown in FIG. 7a, the L-shaped horizontal member 39b rests on the front wheel shaft 21, and when the front wheel shaft 21 rotates clockwise (arrow X in FIG. 7a). The protruding pin 39a protruding from the front wheel shaft 21 is blocked by the L-shaped horizontal member 39b, and the front wheel shaft 21 cannot rotate clockwise and the vehicle cannot travel. On the contrary, when the front wheel shaft 21 rotates counterclockwise (see arrow Y in FIG. 7a), the protruding pin 39a springs up the L-shaped horizontal member 39b, so that the front wheel shaft 21 is free to rotate. When the handle bar 39d is tilted in the advancing direction (see the white arrow in FIG. 7b), as shown in FIG. 7b, the tip of the L-shaped horizontal member 39b is lifted, and the protruding pin 39a is not obstructed. The clockwise rotation becomes free (see the arrow X in FIG. 7b), and the traveling vehicle starts to move forward by the return of twisting of the rubber cord 3a and the rubber cord 3b (the white arrow in FIGS. 4 and 5a). reference). The handle bar 39d tilted in the advancing direction is configured not to be naturally returned by friction.

  As described above, in the twisting process of the rubber cord and the returning process of the twisting, the central pulley 1 always receives the same and the same tension from the left and right rubber cords 3a, 3b. There is little movement and there is no contact with the bearing material, and the rotational efficiency is increased.

  Example 2 An example in which the central pulley 1 is turned and the left rubber string 3a and the right rubber string 3b having rotating bodies at the ends are twisted. FIG. 8 shows a plan view of the second traveling vehicle. 9 shows the side surface.

  One rear horizontal frame 40a is fixed to the rear of one left vertical frame 41a and the other right vertical frame 41b, and the middle horizontal frame 40b penetrates from the center of the left vertical frame 41a and the right vertical frame 41b. Fixed, the rear horizontal frame 40a and the middle horizontal frame 40b protrude beyond the left vertical frame 41a and the right vertical frame 41b. The other front horizontal frame 42 is fixed to the front of the left vertical frame 41a and the right vertical frame 41b. Bearing materials 2a, 2b, 2c and 2d are fixed to the rear horizontal frame 40a and the middle horizontal frame 40b. The central pulley 1 is supported by the bearing members 2a and 2b, the shaft of the left rear wheel 43a is supported by the bearing member 2c and the left vertical frame 41a, and the shaft of the right rear wheel 43b is supported by the bearing member 2d and the right vertical frame 41b. It is supported by. A left front wheel 45a is fixed to one of the left and right sides of the front wheel shaft 44 rotatably supported by the left vertical frame 41a and the right vertical frame 41b, and a right front wheel 45b is fixed to the other.

  The left rubber string 3a is hung on one of the left and right hooks of the center pulley 1 and the hook of the left rear wheel 43a, and the right rubber string is hooked on the other hook of the center pulley 1 and the hook of the right rear wheel 43b. 3b is hung. The left rubber string 3a and the right rubber string 3b have the same thickness and the same length.

  A left vertical member 46a is fixed to the center of the left vertical frame 41a, and a right vertical member 46b is fixed vertically to the center of the right vertical frame 41b. A horizontal upper bearing member 47a is disposed above the left and right vertical members 46a and 46b. However, the horizontal lower bearing material 47b is supported below.

  A central drive pulley 21 is fixed to a drive shaft 49 vertically supported by the horizontal upper bearing material 47a and the horizontal lower bearing material 47b, and is connected to the central pulley 1 by a central transmission belt 24. The rotational force of the drive pulley 21 is transmitted to the central pulley 1. A crank-shaped rotary handle 10 for rotating the drive shaft 49 in the clockwise direction is attached to the end of the drive shaft 49. In order to prevent the rotation handle 10 from rotating in the counterclockwise direction, a reverse rotation prevention tool 48 is provided. This reverse rotation preventing tool 48 has the same mechanism as the reverse rotation preventing tool 60 shown in FIG.

  When the left and right rear wheels 43a and 43b are pressed against the running surface to be stationary, and the rotary handle 10 is turned horizontally (see the arrow X in FIG. 8), the central drive pulley 21 and the central transmission belt 24 are rotated. Rotational force is transmitted to the central pulley 1 via the left and right rubber strings 3a and 3b. When the left and right rear wheels 43a and 43b are pushed back to their normal state after sufficiently twisted, the left and right rear wheels 43a and 43b rotate (see arrow Y in FIG. 9), and the vehicle starts running (see FIG. 9). (See the white arrows in FIGS. 8 and 9).

  The central pulley 1 is pulled from the left and right rubber straps 3a and 3b in both directions simultaneously and with the same force. Therefore, the central pulley 1 does not move left and right and does not contact the bearing member 2a or 2b. Run well.

  Example 3 An example in which the left rubber string 3a and the right rubber string 3b are twisted to apply a rotational force to the central pulley 1, FIG. 10 is a plan view of the third traveling vehicle, and FIG. Show.

  One front horizontal partition member 51a and the other rear horizontal partition member 51b before and after the main body frame 50 are penetrated and fixed in the left and right left and right frame portions of the rectangular frame-shaped main body frame 50, respectively. The front and rear horizontal partition members 51a and 51b protrude from the left and right frame portions of the main body frame 50, and a left vertical frame 52a and a right vertical frame 52b are formed at respective ends of the horizontal partition members 51a and 51b. It is fixed.

  A left vertical bearing member 53a and a right vertical bearing member 53b are fixed to the center portions of the left vertical frame 52a and the right vertical frame 52b, respectively, and a drive shaft 54 is supported by the left and right vertical bearing members 53a and 53b. A left drive pulley 55a is fixed to one of the left and right sides, and a right drive pulley 55b is fixed to the other, and a crank-shaped rotary handle 10 for rotating the drive shaft 54 is attached to the right end. An anti-reverse tool 60 is attached to the rotary handle 10.

  As shown in FIGS. 12 a and 12 b, the reverse rotation preventing device 60 has one end portion hinged to the right vertical bearing member 53 b and the other end portion having a length that allows contact with the crank portion of the rotary handle 10. A reverse rotation preventing projection 60b is fixed to the right vertical bearing member 53b so that the plate 60a and the other end of the thin plate 60a cannot rotate clockwise. One end of a rubber cord 60c is stopped at the center of the thin plate 60a, and the other end is fixed to the right vertical frame 52b. That is, the thin plate 60a is always attracted to the reverse rotation preventing projection 60b. When the rotary handle 10 is turned clockwise (see arrow X in FIG. 12a), as shown in FIG. 12a, the rotary handle 10 can freely rotate while extending the rubber string 60c and repelling the thin plate 60a. (Refer to arrow X in FIG. 12a) and counterclockwise rotation (see arrow Y in FIG. 12b), as shown in FIG. 12b, the thin plate 60a is attracted to the reverse rotation projection 60b by the rubber cord 60c, and comes into contact. This is impossible because clockwise rotation of the thin plate 60a is prevented.

  The central pulley 1 is supported by bearing members 2a and 2b fixed to the front and rear lateral partition members 51a and 51b. One end of the left rubber cord 3a is connected to one of the left and right hooks, and the other hook is connected to the right. One end of the rubber cord 3b is hung. The other end of the left elastic cord 3a is hooked to the left pulley 61a whose shaft is supported by the left vertical frame 52a and the left frame of the main body frame 50, and the other end of the right elastic cord 3b is the right vertical frame. The frame 52b and the right frame 61 of the main body frame 50 are hung on the hooks of the right pulley 61b whose shafts are supported. The left driving pulley 55a and the left pulley 61a are connected by a left transmission belt 56a, and the right driving pulley 55b and the right pulley 61b are connected by a right transmission belt 56b to transmit a rotational force. It is like that.

  The front wheel shaft 57a and the rear wheel shaft 57b are rotatably supported by the left and right frame portions at the front and rear of the main body frame 50. A left front wheel 58a and a right front wheel 58b for driving are fixed to both ends of the front wheel shaft 57a, and a rotation pulley 62 is fixed to the center portion, and the rotation direction and operation / stop of the front wheel shaft 57a are controlled as shown in FIG. A rotation control device 23 is provided. A left rear wheel 59a and a right rear wheel 59b, which are empty wheels, are fixed to both ends of the rear wheel shaft 57b. A central transmission belt 14 is hung so that a rotational force is transmitted from the central pulley 1 to the rotary pulley 62.

  The rotation control device 23 has the same function as that shown in FIG. 7. When the handle bar 39d is upright, the front wheel shaft 57a is stopped, and the rotation handle 10 is manually rotated, the left and right drive pulleys 55a are provided. , 55b and the left and right transmission belts 56a and 56b, a rotational force is transmitted to the left pulley 61a and the right pulley 61b, and the left rubber cord 3a and the right rubber cord 3b are simultaneously and identically twisted. It will be twisted. The rotation of the rotary handle 10 is stopped after twisting the left and right rubber strings 3a and 3b. The rotary handle 10 is placed in a stopped state even when the hand is released by the action of the anti-reverse device 60 described above.

  When the handle bar 39d of the rotation control device 23 is tilted forward and switched to the operation, the central pulley 1 rotates and the left and right front wheels 58a and 58b move via the central transmission belt 14 and the rotary pulley 62. The vehicle travels (see the arrow X in FIG. 11), and the third traveling vehicle starts moving forward (see the white arrow in FIGS. 10 and 11).

  When it is necessary to further increase the driving force of the traveling vehicle, in the present invention, the central pulley 1 is not biased to one side even if the tension of the rubber cord increases, so that the left and right rubber cords 3a and 3b are thickened. In the third embodiment, only the front wheels 58a and 58b are used as driving wheels. However, the rear wheels 59a and 59b can be easily converted into driving wheels.

1: Center pulley 2a: Center pulley bearing material 2b: Center pulley bearing material 3a: Left rubber string 3b: Right rubber string 4: Center transmission belt 5: Rotating pulley 6: Rotating shaft 7a : Left rotating body 7b: Right rotating body 8: Drive shaft 9: Center driving pulley 10: Rotating handle 11a: Left pulley 11b: Right pulley 12a: Left fixing member 12b: Right fixing member 13a: Left driving Pulley 13b: right drive pulley 14a: left transmission belt 14b: right transmission belt 21: rotation shaft 22 of the first traveling vehicle: rotation pulley 23 of the first traveling vehicle 23: rotation control device of the first traveling vehicle 24: Central transmission belt 30 of the first traveling vehicle: Main body frame 31 of the first traveling vehicle: Side partition material 32a of the first traveling vehicle: Left front wheel 32b of the first traveling vehicle: Right front wheel 33 of the first traveling vehicle: First Rear wheel shaft 34a of one traveling vehicle: Left rear wheel 34b of the first traveling vehicle: First traveling Both right rear wheels 35a: left U-shaped bearing member 35b of the first traveling vehicle: right U-shaped bearing member 36 of the first traveling vehicle 36: protruding rod 37 of the rear wheel shaft of the first traveling vehicle 37: protruding rod of the first traveling vehicle Rubber strap 38: restraining plate 39a of the projecting rod of the first traveling vehicle: projecting pin 39b of the rotation control device of the first traveling vehicle: L-shaped horizontal member 39c of the rotation control device of the first traveling vehicle: U-shaped bearing material 39d of the rotation control device: Handle bar 40a of the rotation control device of the first traveling vehicle: Rear lateral frame 40b of the second traveling vehicle: Middle lateral frame 41a of the second traveling vehicle: Left longitudinal of the second traveling vehicle Frame 41b: Right vertical frame 42 of the second traveling vehicle 42: Front lateral frame 43a of the second traveling vehicle 43: Left rear wheel 43b of the second traveling vehicle 43: Right rear wheel 44 of the second traveling vehicle 44: Front wheel axis of the second traveling vehicle 45a: left front wheel 45b of the second traveling vehicle: right front wheel 46a of the second traveling vehicle: left lead of the second traveling vehicle Material 46b: Right vertical material 47a of the second traveling vehicle: Horizontal upper bearing material 47b: Horizontal lower bearing material 48: Reverse rotation preventing tool 49 of the second traveling vehicle 49: Drive shaft 50 of the second traveling vehicle: Main body of the third traveling vehicle Frame 51a: Front lateral partition member 51b of the third traveling vehicle: Rear lateral partition member 52a of the third traveling vehicle 52a: Left vertical frame member 52b of the third traveling vehicle: Right vertical frame member 53a of the third traveling vehicle: Third traveling Vehicle left vertical bearing member 53b: Third traveling vehicle right vertical bearing member 54: Third traveling vehicle drive shaft 55a: Third traveling vehicle left drive pulley 55b: Third traveling vehicle right drive pulley 56a: left transmission belt 56b of the third traveling vehicle: right transmission belt 57a of the third traveling vehicle: front wheel shaft 57b of the third traveling vehicle: rear wheel shaft 58a of the third traveling vehicle: left front wheel 58b of the third traveling vehicle: first Right front wheel 59a of the three traveling vehicle: Left rear wheel 59b of the third traveling vehicle: Third traveling Right rear wheel 60 of the traveling vehicle: Reverse rotation prevention tool 60a of the third traveling vehicle 60: Thin plate 60b of the reverse rotation prevention tool: Reverse rotation prevention protrusion 60c of the reverse rotation prevention tool: Rubber string 61a of the reverse rotation prevention tool: Left push of the third traveling vehicle -Ri 61b: Right pulley of the third traveling vehicle 62: Rotation pulley of the third traveling vehicle

Claims (6)

The left and right rubber strings have the same length and thickness, and one end of the left elastic string is hung on one of the left and right left hooks of the central pulley, and one end of the right elastic string is connected to the other right hook. The other end of the left rubber cord is fixed to the left and right left fixing members, and the other end of the right rubber cord is fixed to the right fixing member, and the central pulley is rotated in one direction. And rotating the left rubber string and the right rubber string to accumulate a rotational force in the reverse direction due to the return of the rubber string twisted in the central pulley. The left and right rubber strings have the same length and thickness, and one end of the left elastic string is hung on one of the left and right left hooks of the central pulley, and one end of the right elastic string is connected to the other right hook. The other end of the left rubber cord is fixed to the left and right rotating bodies, and the other end of the right rubber cord is fixed to the right rotating body, and the central pulley is rotated in one direction. And rotating the left rubber string and the right rubber string to accumulate the rotational force in the same direction as the central pulley in the left rotating body and the right rotating body. The left and right rubber strings have the same length and thickness, and one end of the left elastic string is hung on one of the left and right left hooks of the central pulley, and one end of the right elastic string is connected to the other right hook. The other end of the left rubber cord is fixed to one of the left and right left pulleys. Similarly, the other end of the right rubber cord is fixed to the other right pulley, and the left pulley is fixed. And the right pulley are rotated in one direction, and the left rubber cord and the right rubber cord are twisted to rotate the central pulley in the same direction as the left pulley and the right pulley. Rotation drive device characterized by accumulating   The rotary shaft further includes an input and output device having a left rotating body on one of the left and right of the rotating shaft, a right rotating body on the other, and a rotating pulley fixed in the center, and the rotating pulley and the central pulley Rotating belts are connected to each other so that rotational force can be transmitted between them, the left rotating body and the right rotating body are rotated in one direction, and rotated to the central pulley via the rotating pulley and the rotating belt. Transmitting the force, twisting the left rubber string and the right rubber string and then untwisting, transmitting the rotational force to the rotating pulley via the central pulley and the rotating belt, The rotation driving device according to claim 1, wherein the left rotating body and the right rotating body are rotated in opposite directions. An input device having a central drive pulley and a rotary handle fixed to the central drive shaft, and connected by a central belt so that rotational force can be transmitted from the central drive pulley to the central pulley; The left rotating body and the right rotating body are placed in a temporarily fixed state, a central driving shaft is rotated by the rotating handle, and a rotational force in one direction is applied to the central pulley via a central driving pulley and a central belt. 3. The rotation according to claim 2, wherein after the transmission and twisting of the left rubber string and the right rubber string, the fixed state of the left rotating body and the right rotating body is released and a rotational force in the same direction is applied. Drive device. An input device in which a left drive pulley is fixed to one of the left and right sides of the drive shaft, a right drive pulley having the same diameter as the left drive pulley is fixed to the other, and a rotary handle is provided at the end of the drive shaft. Further, the rotating handle is connected to the left driving pulley from the left driving pulley and from the right driving pulley to the right pulley so that rotational force can be transmitted. The rotational force of the drive shaft is transmitted to the left pulley and the right pulley, the left rubber cord and the right rubber cord are twisted, and the rotational force is accumulated in the central pulley. The rotation drive device according to claim 3.

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