JP3131015U - Practice bicycle - Google Patents

Abstract

A distance and an angle between a pedal shaft and a saddle or a handle can be changed.
A practice bicycle has a substantially parallelogram frame including a front frame, a rear frame, an upper frame, a lower frame, and an oblique frame. The upper frame 13, the lower frame 14a, and the oblique frame 15 can be expanded and contracted in the length direction. Further, since the intersections of the upper frame 13, the rear frame 12, the oblique frame 15, the lower frame 14a, and the oblique frame 15 are pin joints, the respective frames can be individually adjusted without being linked.
[Selection] Figure 1

Description

  The present invention relates to a bench-type bicycle, and more particularly to an exercise bicycle including a frame that can independently adjust the position of a saddle and a handle in the front-rear direction with respect to a rotation axis of a bicycle pedal.

  Conventionally, for example, in sports centers, rehabilitation facilities, or training facilities for competitive bicycles, bench-type practice bicycles in which various measuring devices are attached with the vehicle body fixed to a support stand or the like have been used in large numbers. In many cases, the height of the steering wheel and saddle of the bicycle for practice can be easily adjusted according to the body shape and driving posture of the user. However, it has been difficult to sufficiently cope with the body shape, driving posture, etc. of the user only by adjusting the height of the handle or saddle. For this reason, there is a problem that it becomes difficult to ride a bicycle for practice or fatigue easily.

By the way, with respect to a normally used bicycle, not only adjustment of the height of the handle and saddle, but also a bicycle in which the saddle and the handle can be adjusted in the front-rear direction while interlocking with each other has been proposed (for example, Patent Document 1). reference.).
Japanese Patent Laying-Open No. 2005-162179 (pages 1 to 7, FIG. 1)

  However, since the distance between the saddle and the steering wheel is constant in the above-described bicycle, it is difficult to adjust the saddle or the steering wheel to a more optimal position with respect to, for example, a difference in height or a difference in posture of the upper body. Met. Moreover, although the bicycle mentioned above uses the parallelogram frame, since there is no diagonal bracing member, when an excessive force is applied, there is a possibility that the bicycle will fall in the front-rear direction.

  Therefore, an object of the present invention is to propose a bicycle for training with high frame rigidity, in which the position of the saddle and the handle can be adjusted independently with respect to the rotation axis of the bicycle pedal, respectively. It is in.

  That is, the practice bicycle according to the present invention has a substantially parallelogram frame, and the frame includes a front frame that supports a handle, a rear frame that supports a saddle, an upper end of the front frame and the rear frame. It has an upper frame that can be freely rotated in the length direction and that is rotatably attached to each part. Further, a lower frame that is rotatably attached to lower ends of the front frame and the rear frame, a rotatable intersection of the upper frame and the rear frame, and a rotatable point of the lower frame and the front frame. It is in having an oblique frame which can be expanded and contracted in the length direction attached to each intersection point rotatably.

  The oblique frame may be attached to one of the intersections of the front frame, the rear frame, the upper frame, and the lower frame and a frame facing the intersection. Further, the oblique frame may be attached to one of the front frame, the rear frame, the upper frame, and the lower frame and a frame other than the frame. Further, it is desirable that the lower frame can be expanded and contracted in the length direction.

  Since the position of the saddle and the handle can be adjusted independently in the longitudinal direction with respect to the rotation axis of the pedal of the bicycle for practice, the distance between the saddle and the handle and the horizontal distance between the saddle and the rotation axis of the pedal Can be changed freely. For this reason, when using a practice bicycle, it is easier to match the body shape of the user and a more optimal driving posture can be taken. Therefore, it becomes easy to ride a bicycle for practice, and it becomes difficult to get tired.

  In addition, since it can be adapted to various driving postures, it becomes easier for disabled people and elderly people to use exercise bicycles in daily life, fitness and rehabilitation. Furthermore, it becomes possible for a bicycle athlete to find a driving posture capable of maximizing his power and reflect it in the production of a bicycle for actual use.

  A practice bicycle according to the present invention will be described with reference to FIGS. In FIG. 1, a practice bicycle 1 according to the present invention is of a bench type, and a dynamometer 4 is installed on the rear wheel. That is, the practice bicycle 1 has a substantially parallelogram frame surrounded by a front frame 11, a rear frame 12, an upper frame 13, and two lower frames 14a, 14a parallel to each other. A handle 18 that can be slid in the axial direction and adjusted in height is provided at the upper end of the front frame 11. Although not shown, an anomaly switching device corresponding to a second gear provided in the pedal 19 is installed on the left handle 18 from the front of the practice bicycle 1. On the other hand, the right handle 18 is provided with an anomaly switching device corresponding to a 10-speed gear provided to the rear wheel 21.

  Further, a flat plate 11a is welded to the upper end portion of the front frame 11, and a shaft 11b orthogonal to the left and right direction as viewed from the front of the practice bicycle 1 is provided at the lower end portion of the front frame. Yes. The upper frame 13 includes a rear member 13a having a large diameter and a front member 13b having a small diameter that is slidably inserted into the rear member, and a fixture 13c that can be easily fixed at an arbitrary slide position. Have. As the fixing tool 13c, for example, a screw hole is provided in the rear member 13a having a large diameter, and a tip of a screw screwed into the screw hole is used to press the outer periphery of the front member 13b having a small diameter. An eccentric cam is attached to the rear member, rotated by a lever, and the outer periphery of the eccentric cam is pressed against the outer periphery of the front member having a small diameter.

  Further, the rear end portion of the rear member 13a of the upper frame 13 and the flat plate 12a welded to the upper end portion of the rear frame 12 are rotatably connected by a pin joint. Further, a saddle 17 having a saddle support portion 16 having a smaller diameter than the rear frame is slidably inserted above the rear frame 12. On the other hand, the front end portion of the front member 13b of the upper frame 13 is pin-jointed to a flat plate 11a welded to the upper end portion of the front frame 11, and is rotatable.

  Both ends of the lower frame 14a, 14a of the exercise bicycle 1 constitute an upper portion of a support base 14 placed on the floor as shown in FIGS. Here, the support base 14 includes two lower frames 14a and 14a, front members 14c and 14c, a lower member 14b, support members 14d and 14d, and leg members 14h and 14h, which are welded to each other. Configured. The relationship between the lower frames 14a and 14a and the front frame 11 will be described with reference to FIG. The lower frames 14a and 14a are steel square members, and length adjusting portions 14g and 14g are welded to upper end surfaces thereof, respectively. Further, in the length adjusting portion, recesses of L, M, and S are formed in order from the right side of FIG. A shaft 11b provided at the lower end portion of the front frame 11 is fitted into this recess. The shaft 11b has a bolt shape, and a nut-shaped stopper member 11c is screwed into one end portion thereof, and the length adjusting portions 14g and 14g are inserted from the outside between the bolt head of the shaft and the stopper member. The shaft prevents the shaft from coming off from the recess L or the like.

  The relationship among the front frame 11, the oblique frame 15, and the support base 14 will be described with reference to FIG. 1 or FIG. The diagonal frame 15 is a stainless steel rod-like member, and a male screw is formed at the upper end of the diagonal frame. And this male screw is screwed with the female screw provided in the joint part 15b. The joint portion 15b is rotatably connected to a flat plate 12a welded to the upper end portion of the rear frame 12 by a pin joint. In addition, a ring-shaped handle 15 a for rotating the oblique frame around its axis is attached to the lower end portion of the oblique frame 15. Furthermore, the diagonal frame 15 and the two front members 14c and 14c are rotatably connected by pin joints 14f and 14f, respectively.

  The relationship among the rear frame 12, the lower frame 14a, and the pedal 19 will be described with reference to FIG. The pedal 19 is formed of leg placement portions 19a and 19a, pedal support portions 19c and 19c, and a shaft portion 19b. The shaft portion 19b is rotatably provided with a shaft support portion 19d having a diameter larger than that of the shaft portion. Both end portions of the shaft support portion 19d are fixed to clamping members 3 and 3 provided outside the lower frame 14a. In FIG. 4, the chain wheel 20 is fixed to the outer periphery of the shaft support portion 19b between the clamping member 3 located on the near side and the pedal support portion 19c.

  Further, an upper presser portion 12 b is formed on the lower side portion of the rear frame 12. The shaft support portion 19d is sandwiched between the upper presser portion 12b and the lower presser member 12d facing the upper presser portion 12b, and both ends of the upper presser portion and the lower presser member are fastened by bolts 12c and 12c, respectively.

  The rear wheel 21 of the exercise bicycle 1 is driven by a chain that is fitted to the outer periphery of the chain wheel 20. The rear wheel 21 is supported by a rear wheel support member 14e, and a dynamometer 4 (such as a “load generator” manufactured by Racer Mate) is installed on the rear wheel support member. Then, the power applied to the rear wheel when the driver depresses the pedal is measured. Further, a pillar 5 is provided in front of the practice bicycle 1, and a monitor 6 is attached to this pillar. On this monitor, numerical values of output (w), speed (mph), rotation speed (rpm), and heart rate (bpm) measured by the dynamometer 4 are displayed.

  The practice bicycle according to the present invention can expand and contract each frame of the bicycle and measure the place where it can exert the most power according to the body shape of the driver, so it can be used in the industry related to the production and fitness of practice bicycles. Widely available.

It is a side view of the bicycle for practice. It is an enlarged view of a support stand. It is a partial front view enlarged view of a practice bicycle. It is an enlarged view of the junction part of a rear frame and a pedal. It is a side view of the bicycle by other invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Practice bicycle 11 Front frame 12 Rear frame 13 Upper frame 14 Support base 14a Lower frame 14d Support member 14g Length adjustment part 15 Diagonal frame 4 Dynamometer 5 Pillar 6 Monitor

Claims (4)

It has a frame consisting of almost parallelograms,
The above frame
A front frame that supports the handle,
A rear frame that supports the saddle,
An upper frame that is rotatably attached to the upper end of the front frame and the rear frame, and that is extendable in the length direction;
A lower frame rotatably attached to lower ends of the front frame and the rear frame,
The upper frame and the rear frame have a rotatable intersection, and the lower frame and the front frame have a rotatable frame that is attached to each other in a rotatable manner in a longitudinal direction. A practice bicycle characterized by       In claim 1, the diagonal frame is replaced with one of the four intersections of the front frame, the rear frame, the upper frame, and the lower frame instead of the intersection of the two, and a frame facing the intersection. A bicycle for practice, characterized in that each is mounted rotatably.       2. The oblique frame according to claim 1, wherein the oblique frame is rotatably attached to any one of the front frame, the rear frame, the upper frame, and the lower frame and a frame other than the frame instead of the intersection of the two. A practice bicycle characterized by being       The exercise bicycle according to claim 1, wherein the lower frame is extendable in the length direction.

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