JPS5975877A - Bicycle receiver - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bicycle storage device, and more particularly to the structure of a lifting pulley for lifting and lowering a bicycle using a power source such as a weight, a spring, or an air cylinder. In this application, the power source does not refer to electric power, a motor driven by external power such as an engine, or a hydraulic/pneumatic device.
It is simply a means of balancing the weight and force of the bicycle by using potential energy, strain energy, pressure energy, etc.

When pulling up a bicycle using a power source such as a weight, a spring, or an air cylinder, it is conceivable to engage the front wheel of the bicycle with one end of a rope fixed to the power source; A hanging pulley is used to raise the front wheel upwards. If this hanging pulley is made into a cylindrical shape as is often seen in the past, the weight of the weight is almost the same as the weight of the bicycle because the angle of the bicycle with respect to the horizontal plane is different between the state where the bicycle is fully accommodated and the state just before the bicycle is released. If you do this, you will have to push the bicycle downwards with roughly half the force of the bicycle's weight just before releasing the bicycle. Bicycles generally weigh between 16 and 18 kg. When the bicycle is released, the arms of the user of the bicycle storage device are in a nearly horizontal position, making it difficult for the user to put his or her weight on it, and it is quite difficult to apply a downward force of 8 to 9 Kq to the bicycle handlebars in this state. It turned out to be.

In addition, when lifting a bicycle using a spring as the power source, the tensile force of the spring changes depending on the position of the bicycle, so if the wrapping surface of the hanging pulley is cylindrical, this change will be directly transmitted to the bicycle. - operation becomes even more difficult. A similar problem occurs when using the pressure energy of a sealed gas, such as in an air cylinder.

In the present invention, the wrapping surface of the suspension pulley is basically composed of two parts, at least one part is approximately conical, and the other end of the first rope to be connected to the bicycle is connected to the suspension pulley. a second rope coupled to the end of one section and the other end of a second rope coupled to a power source, such as a weight, a spring, or an air cylinder, to the end of the other section of the hanging pulley; 1. By wrapping the second ropes around the suspension pulley in such a way that when one is wound, the other is unwound, the rotational moment around the axis is maintained in the suspension pulley regardless of the position of the bicycle in the storage device. First, the balance is maintained. This absorbs the unbalance of force between the second ropes.

Embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 5 show a first embodiment of the present invention.

Fig. 1 shows a state in which the lifting pulley according to the present invention is adopted as a weight lifting type eye wheel storage device and a bicycle is accommodated therein, Fig. 2 is a view in the direction of arrow P in Fig. 1, and Fig. 3- 2 is a sectional view taken along the line A-A, FIG. 4 shows the bicycle in a state just before it is released, and FIG. 5 is a view taken along arrow Q in FIG. 4.

In the figure, R is the bicycle, 1 is the bottom plate of the guide passage, 2 is the two left and right guide passage side plates, 3 is the traction body, 3a is the traction body, 3b is the front wheel guide wheel connected to the traction body, 3c is the bicycle R release Immediately in front, 3c is a mooring fitting that is rotatably provided on the towing body that fits into the notch 2a of the side plate 2 by the action of a spring (not shown) and mooring the towing body to the guide path, and 3d is a mooring metal fitting that is freely rotatable on the towing body. 4 is a hanging pulley rotatably mounted on the shaft 4a, 4b is a cylindrical part of the hanging pulley, 4C is a substantially conical part of the hanging pulley, and 4d is a rope guide steel wire welded to the outer periphery of 4a. , 5 is a first rope with one end welded to the towing body and the other end to the large diameter part of 40, and 6 is a second rope with one end welded to the weight 7 and the other end to 4b. . For example, as shown in Japanese Patent Application No. 55-082787, the mooring metal fitting provided on the towing body changes its attitude upon contact with the front wheel when the bicycle is released, and the towing body can be released from the mooring state to the guide passage.

In the state shown in FIG. 1 in which the bicycle R is completely accommodated, the first loaf 05 is separated from the suspension pulley 40 near the boundary between the cylindrical portion 4b and the substantially conical portion 4c, and the first rope and The magnitude of the moment arm around the center axis of the hanging pulley due to the tension force of the second rope is approximately equal. Therefore, if the weight of the weight 7 is approximately equal to or slightly larger than the weight of the bicycle R, the bicycle R can be stably accommodated and the bicycle can be inserted easily.

When the bicycle R is moved downward from the state shown in FIG. As a result, the release point of the hanging pulley 5 moves to the larger diameter side, and the moment arm around the central axis of the hanging pulley of tension 5 becomes larger, and the rotational moment of the hanging pulley due to the weight and the moment of rotation of the hanging pulley due to the weight are almost balanced regardless of the position of the bicycle. Although a detailed explanation will be omitted, if the inclination angle of the bicycle when the bicycle is stored is 75 degrees, the tension force acting on the first rope immediately before the bicycle is released will be approximately half that when the bicycle is stored.

Therefore, in this case, the ratio of the large diameter to the small diameter of the substantially conical portion 4c of the hanging pulley may be set to 2.

In addition, the weight of the weight is approximately half of the weight of the bicycle,
In FIGS. 2 and 5, 4b is a substantially conical shape with a ratio of the large diameter to the small diameter of about 2, and 4c is a cylindrical shape having a diameter equal to the small diameter of 4b. Loaf 0 may be wound with unwinding of a first rope welded to one end of 40. However, in this case, the stroke size of the weight becomes larger than in the first embodiment, but it is sufficient to dig a bit or the like through which the weight can pass through the base directly below the weight.

Also, in any case, the generatrix of the approximately conical pulley surface has a shape that satisfies the following equation: Moment arm of tension force X4c = moment arm of weight 1X4b. preferable. Strictly speaking, the generatrix shape of a substantially conical pulley surface that satisfies the above equation is a curve, but approximately, the ratio of the large diameter to the small diameter can be calculated from the balance of the rotational moment of the hanging pulley in the accommodated state and immediately before release. In consideration of the stroke size of the traction body, there is no practical problem in using a cone with a linear generatrix shape as defined in mathematical terms as the pulley surface.

FIG. 6 shows a second embodiment of the present invention, in which a suspension pulley according to the present invention is adopted as a spring-suspended rolling wheel housing device and a bicycle is accommodated therein, and FIG.
It is a view taken along arrow S in the figure.

In Figures 6 and 7, 4 is a hanging pulley that can rotate freely about its axis, 4 b / 4 c are all hanging pulley parts whose pulley surfaces are approximately conical, and 5 is a hanging pulley with one end. 6 is a first rope whose other end is welded to the large diameter part of 40 to the towing body; 6 is a second rope whose one end is welded to the spring 8 and the other end to the large diameter part of 4b'; is almost the same as the first embodiment.

In the state shown in FIG. 6, in which the bicycle is completely accommodated, the bicycle is lifted with the spring stretched a certain amount. When the bicycle is moved downward from this state, the angle of inclination of the bicycle decreases and the tension on the first rope decreases. On the other hand, as the spring 8 stretches, the tension force of the 20th loaf 06 increases, but during this time, the moment arm of the first loaf 5 increases, and the moment arm of the second rope 6 decreases, causing the tension in the hanging pulley to increase. The rotational moment about the axis is always balanced, and there is no need to apply any additional force to the bicycle from the outside.

The pulley surfaces 4b' and 4c must be substantially conical with a generatrix shape that satisfies the following: tension force 5 x moment arm 4c = tension force 6 x moment arm 4b'. However, as in the previous example, the ratio of the large diameter to the small diameter is determined from the balance of the rotational moment of the hanging pulley in the stored state and immediately before release, and the generating line shape is a straight cone, taking into consideration the stroke dimension of the towing body. There is no practical problem in using it as a pulley surface.

Similarly, if necessary, the pulley shown in FIG. 7 may be used in the case of using a weight, and conversely, the pulley shown in FIG. 2 may be used in the case of swinging.

In this application, loaf means not only so-called ropes such as steel cables and ropes, but also chains, ropes, and the like.

That is, if the first rope is a chain, the above-described embodiment can be achieved by providing a spiral group of small protrusions on the outer periphery of the conical part 4c of the hanging pulley 40, into which the chain is bitten at intervals equal to the pitch of the chain links. You can expect similar functionality.

The same applies to chains.

Further, in the embodiment of the present application, the hanging pulley shaft is made up of two parts, but a plurality of shafts may be used using gears or the like, or the hanging pulley may be composed of three or more parts.

According to the present invention, when the bicycle is released, the user can move the bicycle downward without applying any force to the handlebars of the bicycle, thereby solving the problem of bicycle abandonment in the suburbs of large cities. -I'm sure it will help.

[Brief explanation of the drawing]

FIG. 1 shows a side view of a bicycle storage device according to a first embodiment of the present invention, FIG. 2 shows a front view of a hanging pulley used in the bicycle storage device of FIG. Figure 3 is A- in Figure 2.
A sectional view is shown, FIG. 4 is a side view of the bicycle storage device of the first embodiment, just before the bicycle is released, FIG. 5 is a front view as seen from direction Q in FIG. 4, and FIG. A side view of a bicycle storage device according to a second embodiment of the present invention is shown, and FIG. 7 is a front view seen from the direction S in FIG. 6. [Explanation of symbols of main parts] R... Bicycle 1... Guide path bottom plate 2... Guide path side plate 6... Traction body 6a... Traction body 3b
...Front wheel guide wheel 5c...Mooring metal fitting 5d...Arm 4...Hanging pulley 4a...Shaft 4b...Hanging pulley cylindrical part 4b'...Hanging pulley approximately conical part 4C... - Hanging pulley approximately conical part 4d...Rope guiding steel wire 5...First rope 6...Second rope 7,...
Weight 8...Spring o 16 Ozriri

Claims (1)

[Claims] A bicycle storage passageway that is perpendicular to the horizontal plane or has a large inclination angle, a bicycle traction body that moves downward while being guided by the passageway, a mooring means for mooring the traction body to the lower part of the passageway, and a bicycle front wheel when the bicycle is inserted. In a bicycle storage device comprising a means provided on a traction body for releasing the moored state and grasping the bicycle upon contact with the traction body, and a means for pulling the traction body, at least one of the first ropes connected to the traction body is A suspension pulley basically consisting of two pulley surfaces having a substantially conical pulley surface is connected to one pulley surface, and a second rope connected to a power source for lifting a bicycle is attached to the other pulley surface of the suspension pulley. A bicycle storage device characterized by being combined.