JP2534470Y2 - Braking device for play bicycle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a braking device for a play bicycle, which is installed in a park, an amusement park, a nursery school, a kindergarten and the like, and in which a plurality of infants and children can play.

[0002]

2. Description of the Related Art Conventionally, as a braking device for an amusement bicycle, there is one disclosed in Japanese Patent Application Laid-Open No. 3-49790, which has been filed by the applicant of the present invention. That is, in the conventional braking device, a brake drum is mounted on a central shaft on which a play bicycle is mounted, and a rod with a weight that receives centrifugal force accompanying rotation of the disk is rotatably mounted on the disk, and the rod with a weight is mounted on the disk. And a brake drum pressing means for pressing the brake drum in accordance with the rotation of the weight rod.

[0003]

However, in the conventional braking device, since a rod with a weight is attached to a disk and the centrifugal force accompanying the rotation of the disk is used, the bicycle rotates at a considerably high speed. However, it is dangerous to play with infants and children alone. SUMMARY OF THE INVENTION It is an object of the present invention to provide an amusement bicycle capable of solving the above-mentioned drawbacks and enabling children and children to play safely.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an amusement bicycle in which a plurality of bicycles are connected to the outer periphery of a disk rotatable about a central axis. A weight that receives a centrifugal force associated with the rotation of the brake shaft, movably attaches the weight to the brake shaft, and connects the weight to a brake mechanism that brakes the brake shaft. Are connected via a.

[0005]

In the present invention constructed as described above, when the center shaft is rotated by the operation of the pedal of the bicycle, the center shaft and the braking shaft are connected via a speed increasing mechanism comprising a sprocket and a chain. It rotates at a higher speed than the central axis according to the speed ratio. With the rotation of the braking shaft, the weight moves by receiving centrifugal force. When the bicycle reaches a predetermined rotation speed, the rotation of the braking shaft is faster than the rotation speed of the bicycle, so that a sufficient centrifugal force acts on the weight and the braking mechanism reliably operates. As a result, the braking shaft is braked and the center shaft is also braked, so that the bicycle integrated with the center shaft does not reach a dangerous rotation speed and its rotation is reliably suppressed.
Also, in the present invention, a speed increasing mechanism is provided to increase the speed of rotation of the braking shaft compared to the central shaft, so that a sufficient centrifugal force can be obtained on the weight provided on the braking shaft, so that the bicycle integrated with the central shaft is provided. Before the rotation speed of the vehicle reaches the dangerous speed, the braking mechanism reliably operates and brakes.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
In the figure, reference numeral 1 denotes a rotatable center shaft which is rotatably supported by a bearing 1A (see FIG. 2). A plurality of rotating rods 2 are horizontally and radially mounted on the center shaft 1. Numeral 3 is a disk that rotates integrally with each rotary rod 2 about a central axis 1.
To the top of Reference numeral 4 denotes a reinforcing pipe for fixing the disk 3 to each rotating rod 2. On the disk 3, a ring-shaped handrail 5 that can be grasped by infants is provided. The tip side of each rotating rod 2 is bent upward, and the center axis 1 is attached to the upper end of the bent portion.
For example, each of the arc-shaped supports 6 that rotate about the center is attached. Then, a handle 7 and a saddle 8 are respectively attached to the upper side of each support body 6, and wheels 10 which are rotated by a pedal 9 are provided below the support body 6, thereby forming each bicycle 11. Each wheel 10 utilizes a one-way clutch (not shown) so that it can move forward only when the pedal 9 is pedaled, and when the wheel 10 rotates by rotation of the disc 3, the pedal 9 is in a stationary state. To be.

Next, a first embodiment of the braking device will be described with reference to FIGS. In the first embodiment, a sprocket 12 is mounted on the center shaft 1 as shown in FIG. The brake shaft 15 is supported by a bearing 15A and has a sprocket 14 mounted thereon. The sprocket 12 and the sprocket 14 are connected by a chain 13, and these constitute a speed increasing mechanism. That is, the speed increasing mechanism sets the diameter of the sprocket 12 larger than that of the sprocket 14, for example, so that the rotation speed of the sprocket 14 is increased to ten times the rotation speed of the sprocket 12. The rotating plate 16 is integrally attached to the braking shaft 15. The rotating plate 16 is formed by integrally attaching plate portions 18 and 19 to a rectangular plate. A weight 21 is movably mounted on the weight mounting plate portion 18 of the rotating plate 16 as follows. That is, the rail 23 is attached to the weight attaching plate portion 18 along its length direction, and the weight 21 is formed by two pairs of rotating wheels 24, 24, 25, 25 provided on the upper portion thereof.
It is clamped by the rail 23. At both ends of the rail 23, stoppers 26, 26 for regulating the moving range of the weight 21 are provided. The weight mounting plate 18 is bent in an inverted L-shape as shown in FIG. Then, a protrusion 22 integrated with the weight 21 is inserted into the slide groove 20 to smooth the weight 21. And the arm-shaped connecting rod 27
Is rotatably attached to the weight 21. Connecting rod 27
Is mounted on the spring mounting plate 19 via a spring 28. As shown in FIG. 5, the inner expansion type brake 17 has the same shape as that of a conventionally known brake, and therefore will be briefly described. The inward expansion type brake 17 has a brake body 29 rotatably fitted on a cylindrical brake body 29A. The brake body 29 is fixed to the brake shaft 15. Brake torso 2
9A is fixed to a fixed base that does not rotate, and the brake shaft 15 is rotatably inserted into a through hole provided in the center thereof. The brake body 29 is configured by arranging a pair of left and right brake pieces 30, a cam 31, a tension spring 33, and the like to which a brake lining 32 is integrally attached, as shown in the drawing. The brake lining 32 is mounted at a position looking into the inner periphery of the brake cylinder 29A, one end of the operating rod 34 is connected to the shaft of the cam 31, and the other end of the operating rod 34 is rotatable about the center of the connecting rod 27 described above. Attach to When the cam 31 rotates in such a configuration, the left and right brake pieces 30 expand around the shaft 47 as a fulcrum against the tension spring 33, and the brake lining 32
Contacts the brake cylinder 29A and stops the rotation of the braking shaft 15.

Next, an example of the operation of the braking device configured as described above will be described. When pedaling the pedal 9 of the bicycle 11,
Accordingly, the disk 3 and the center shaft 1 start rotating.
The rotation of the center shaft 1 is applied to the braking shaft 15 via the chain 13.
Is transmitted to Therefore, the braking shaft 15 is approximately 1
Start rotation at 0 times angular velocity. With the rotation of the braking shaft 15, the rotating plate 16 rotates. When the rotating plate 16 rotates at a certain angular velocity or more, the centrifugal force acting on the weight 21 becomes larger than the tension force of the spring 28, and the centrifugal force causes the weight 21 to move toward the outside of the rotating plate 16. That is, the weight 21 is guided by the rail 23 and moves smoothly outward. At this time, the protrusion 22 integrated with the weight 21 prevents the weight 21 from shifting in the vertical direction.
The connecting rod 27 is pulled and moved with the movement of the weight 21, and the operating rod 34 is also pulled and rotated with the movement of the connecting rod 27. With the rotation of the operating rod 34, the operating rod 34
The cam 31 also rotates, and the brake piece 30 expands and the brake lining 32 hits the brake cylinder 29A. Thus, a braking force is applied to the brake shaft 15, and this braking force brakes the disc 3, so that the bicycle 3 The increase in the rotation speed is suppressed. When the rotation of the brake shaft 15 becomes equal to or less than a certain speed, the tension force of the spring 28 is larger than the centrifugal force acting on the weight 21, so that the weight 21 returns to the original position, and the brake piece 30 and the The integrated brake lining 32 also returns, and the braking force does not work. The speed at which the braking force is applied to the braking shaft 15 can be arbitrarily set by replacing the spring 28 with one having a different tensile force. Since the brake shaft 15 rotates at a high speed such as about 10 times the rotation of the center shaft 1, a large centrifugal force acts on the weight 21 and the movement is easy. Further, the change in the rotation speed of the rotating plate 6 integrated with the braking shaft 15 is about ten times that of the bicycle, so that even if the speed is slightly changed on the bicycle side integrated with the central shaft 1, Big change on the side, brake 1
7 is surely separated.

FIG. 6 shows a second embodiment of the present invention. The sprocket 12 and the sprocket 14 are not directly connected via a chain 13 as in the first embodiment to constitute a speed increasing mechanism. To be configured. That is, the sprocket 12 integrated with the center shaft 1 is connected to a small sprocket 36 mounted on a shaft 37 via a chain 38, and the large sprocket 35 mounted on the same shaft 37 is connected to a sprocket integrated with the braking shaft 15 via a chain 39. Connect with 14. 40,4
Reference numeral 1 denotes tension pulleys, which are tensioned by springs 42 and 43, respectively, and the chains 38, 3
9 is nervous. With the above configuration, the diameter ratio between the sprocket 12 and the sprocket 14 does not need to be as large as in the first embodiment.

Further, if a reverse rotation preventing device as shown in FIG. 2 is attached to the central shaft 1, the safety is further improved. That is, the reverse rotation prevention device has the following configuration. Central axis 1
, A reverse rotation prevention disk 44 is attached. A serrated protrusion is attached to the outer periphery of the reverse rotation preventing disk 44 toward the lower side. The reverse rotation preventing piece 45 is rotatably attached to a fixing piece 46 fixed to the grounding surface, and engages with the serrated protrusion of the reverse rotation preventing disk 44. Since the reverse rotation prevention piece 45 is heavier on the left side of the drawing than on the right side, the left end is normally grounded. With this configuration, the reverse rotation preventing disk 44 rotates from left to right in the drawing, but the reverse rotation is prevented, and as a result, the reverse rotation of the bicycle 11 is prevented.

In each of the embodiments described above, the rotational motion transmitting means is a combination of a gear and a chain. However, a plurality of gears may be used for connection or a combination of a belt wheel and a belt. . Any device can be used as long as it can rotate the conversion means at a rotation speed higher than the rotation speed of the central shaft. The internal expansion type brake 17 is used as the brake, but the present invention is not limited to this. Any brake may be used as long as the lever is pulled, for example, a brake drum is pressed from the outside to apply the braking force. You may.

[0012]

According to the present invention, as described above, the center shaft is connected to the brake shaft via the speed increasing mechanism, and the brake shaft is braked by using the centrifugal force acting on the weight movably mounted on the brake shaft. As a result, the rotation of the bicycle integrated with the center shaft does not reach a dangerous speed, and its rotation is reliably suppressed, so that only infants and children can play safely. Also, in the present invention, a speed increasing mechanism is provided to increase the speed of rotation of the braking shaft compared to the central shaft, so that a sufficient centrifugal force can be obtained on the weight provided on the braking shaft, so that the bicycle integrated with the central shaft is provided. Before the rotation speed of the motor reaches the dangerous speed, the braking mechanism works reliably to perform braking.

[Brief description of the drawings]

FIG. 1 is a schematic overall perspective view of a first embodiment of the present invention.

FIG. 2 is a side view of the braking device.

FIG. 3 is a plan view of a main part of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a schematic view of an inward expansion type brake.

FIG. 6 is a plan view of a main part of the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Center axis 3 Disk 11 Bicycle 12 Sprocket 13 Chain 14 Sprocket 16 Rotating plate 17 Internally expandable brake 18 Weight mounting plate portion 19 Urging plate portion 21 Weight 27 Connecting rod 28 Spring 34 Operating rod

Claims (1)

(57) [Scope of request for utility model registration] An amusement bicycle in which a plurality of bicycles are connected to an outer periphery of a disk rotatable around a center axis as a fulcrum, wherein the center axis is connected to a braking shaft that is supported via a speed increasing mechanism, and the braking is performed. A braking device comprising: a weight that receives a centrifugal force caused by rotation of a shaft, movably attached to the braking shaft; and a weight that is connected to a braking mechanism that brakes the braking shaft via a connecting rod.