JPH085281B2 - Wheels and discs for wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Use and Outline of the Invention] The present invention is of a type in which a rotary shaft and a peripheral annular member are integrated by spokes or disks, such as a wheel of a bicycle or an automobile or a steering wheel. The present invention relates to a wheel or a disc, and when connecting a rotary shaft and a peripheral member with a spoke, it is intended to improve impact resistance by improving a structure in which the spoke is stretched.

[Prior Art and Problem] As a wheel having a structure in which a plurality of spokes are stretched between a rotating shaft and a peripheral member, a spoke wheel used for bicycles and automobiles is the most common wheel.

This spoke wheel has a structure in which a hub mounted on a rotating shaft and a rim as a peripheral member are connected by a large number of spokes, and each spoke includes a locking hole formed near the periphery of the hub and a nipple attached to the rim. Stretched between The direction in which the spokes are stretched is set in the tangential direction of the hub. The tangents are set in two directions.

As a result, the spokes are stretched radially as a whole, and the load applied to the axle is dispersed and acts as a tension on each spoke, and this dispersed load acts on the rim. Further, since each spoke is stretched in a tangential direction with respect to the hub, even when a rotational force acts on the hub, the rotational torque acts on the rim as a tension, and the direction of this tension is the direction of the wheel. Since the rim is inclined at a constant angle with respect to the radial direction, a rotational force is generated on the rim. Further, since the spokes are attached to the hub in two directions, the torque is transmitted in both forward and reverse rotation directions.

As described above, the conventional spoke wheel is completed as a lightweight wheel having a certain strength.

However, this conventional spoke wheel has a problem that its strength is insufficient with respect to a radial impact load.

This is because when a radial impact load is applied to the wheel, the rim attempts to deform into an elliptical shape, but the total number of spokes that exert resistance to this deformation is small.

That is, in this conventional spoke wheel, when an impact load is applied from a lower installation portion, only the spoke group stretched in a direction perpendicular to the direction of the load acts to prevent the deformation of the rim. This is because there is no mistake. This is because tension does not act on the spoke groups other than the spoke groups, and these spoke groups do not function as an impact load bearing member.

Therefore, it is conceivable to increase the rigidity of the rim in order to improve the strength against the impact load. However, increasing the rigidity of the rim in this way leads to an increase in the size or thickness of the rim cross section, and an increase in the weight of the entire wheel cannot be avoided.

According to the present invention, a plurality of spokes (3) (3) for transmitting rotational force are stretched in a predetermined tension applied state between the annular rim (1) and the hub (2), and the rim (1 In the wheel of the type in which tension is applied to the spokes (3) when an external force acts on the wheel (3), it is an object to reduce the weight of the wheel and improve the impact resistance. When a shock load is applied to, the technical theme is to enable more extremely lightweight spoke members to bear the shock load as tension.

<Invention of Claim 1> [Means for Solving the Problem] In order to solve the above-mentioned problems, the means of the present invention "passes a position separated from the hub (2) and directly connects the inner circumferences of the rim (1) to each other. As described above, a large number of auxiliary spokes (4) stretched in a predetermined tensioned state in conformity with the directions of a plurality of types of strings of the rim (1) are arranged substantially equally over the entire inner peripheral side of the rim (1). However, the spokes (3) and the auxiliary spokes (4) are made of a fiber material having a high tensile strength ”.

[Operation] The above means operates as follows.

Between the rim (1) and the hub (2), a plurality of spokes (3) made of a fiber material having a large tensile strength are stretched in a predetermined tensioned state, so that the spokes (3) ( The strength and rigidity under the condition where tension acts on 3) are the same as those of the conventional spoke wheel type wheel. And, of course, the rotational force of the hub (2) is transmitted to the rim (1) via these spokes (3) (3).

Next, when an impact load is applied to the wheel, the rim (1) tries to deform into an elliptical shape. At this time,
Even if the rim (1) has the same rigidity as the conventional rim (1), the rim (1) is made of a large number of fiber materials having high tensile strength so that the rim (1) can be aligned with a plurality of types of chord directions. Since the auxiliary spokes (4) (4) are stretched under a predetermined tension, the auxiliary spokes (4) (4) are separated from some of the spokes (3) (3) during the deformation.
Tension will also act on a part of. That is, when an impact load is applied to the wheel, the number of members on which the tension is applied is larger than that of the conventional wheel.

[Effects] The present invention having the above-described configuration has the following effects.

When the wheel receives an impact load, the number of members on which tension acts increases, so the impact resistance is improved accordingly.
Further, since each spoke is made of a fiber material having a high tensile strength, the total weight can be reduced as compared with the conventional one even if the number of spokes is increased. Furthermore, since the cross section of the rim (1) is neither enlarged nor thickened, the weight of the rim does not increase. Therefore, the wheel is lightweight, has rigidity, and has high impact resistance. In addition, since the rigidity and impact resistance are secured by the tension acting on each of the spokes, when implemented as a wheel for a mountain bike or the like, a wheel having a rigid structure with an integrated rim / spoke / wheel or a conventional wheel is used. Compared with the spoke type wheel, the former has the advantage of less energy loss and the latter has the cushioning property, which greatly improves the riding comfort.

Further, since the auxiliary spokes (4) (4) are directly stretched between the inner peripheral portions of the rim (1), they are not connected in the middle of the stretched section and have a small spoke cross section. Therefore, sufficient strength is exhibited, and the weight can be further reduced in this respect as well.

<< Invention of Claims 2 and 3 >> The invention of Claim 2 is the same as the invention of Claim 1 above.
"At least the entire outer peripheral region in the vicinity of the hub (2) in the stretched region of the spokes (3) and the auxiliary spokes (4) is covered with a sheet-shaped or film-shaped covering member (5), and the spokes (3) and the auxiliary spokes ( 4) integrated with
That is.

According to the invention of claim 3, in the invention of claim 2, "a sheet-shaped or film-shaped covering member (5) is covered over the entire stretched region of the spokes (3) and the auxiliary spokes (4)". It is configured.

In those adopting these configurations, the rotational torque acting on the hub (2) is changed by the covering member (5) and the spokes (3).
It is also transmitted to the rim (1) via (3), and when used as a bicycle wheel, the air resistance during running is small.

Therefore, the power transmission performance is improved and the air resistance during rotation is reduced.

Then, in the third aspect, these effects are further improved.

<Invention of Claim 4> The present invention relates to a disk constituting the wheel of the invention of Claim 3 described above, wherein the disk is stretched between the rim (1) and the hub (2). In order to achieve the same object as the inventions of 4 and 4, the means therefor is "a disc-shaped disk stretched between the annular rim (1) and the hub (2). The annular plate (R) to be attached to the hub (2) is located at the center, and an attaching portion for attaching the disc to the rim is provided at a position where the peripheral edge of the disc is divided into a plurality of portions. A plurality of spokes (3) are stretched between the plate (R) and
A large number of auxiliary spokes (4) passing through a position deviated from the annular plate (R) and stretched so as to match the chord direction of the rim (1) are arranged between the mounting portions arranged on the periphery of the disc. The spokes (3) and (3) and the auxiliary spokes (4) and (4) are made of a fiber material having a large tensile strength, and the entire area where the spokes are arranged is a sheet-shaped or film-shaped annular covering member ( 5) integrated into one
That is.

According to the disk thus constructed, the annular plate (R) is attached to the hub (2), and the mounting portion at the peripheral edge of the disk is attached to the rim (1), whereby the wheel of claim 3 is completed. The wheel has the same effect by the same operation as the invention of claim 3.

In addition, since the work of tensioning the spokes (3) (3) and the auxiliary spokes (4) (4) can be separated from the wheel assembly process, the productivity is improved.

Also, the spokes (3) (3) and the auxiliary spokes (4)
Since the entire stretched area of (4) is integrally combined with the sheet-shaped or film-shaped annular covering member (5), when the disc is handled, each spoke group formed of a fiber material having a high tensile strength is used. Easy to handle without getting tangled.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 14.

The first embodiment shown in FIGS. 1 and 2 is one in which the present invention is applied to a wheel for a bicycle, and includes a rim (1) and a hub (2).
For, use the same as the wheels for conventional bicycles. However, the flange portions (21) and (21) that extend to both ends of the hub (2) are shown in FIG. 3 or 4 in order to facilitate the tensioning of spokes (3) and auxiliary spokes (4) described later. As shown, a large number of protrusions (22) (22) are arranged on the circumference.

Here, the configuration of the brim portions (21) and (21) will be described in detail.

In this embodiment, a separate annular plate (R) is screwed to the flange portions (F) at both ends of the normal hub (2) to form the flange portions (21) (21). On the inner surface side of the annular plate (R), a recessed portion (23) for accommodating the collar portion (F) is formed. The size of the recessed portion (23) is set to a size capable of accommodating the collar portion (F), and when the annular plate (R) is screwed from the outside of the collar portion (F), the collar portion (F) is formed. F) is fitted in the recessed portion (23). On the outer surface of this annular plate (R),
16 protrusions (22) (22) are arranged in the vicinity of the peripheral edge so as to equally divide the circumference, and the number of these protrusions is half the number of nipples (6) mounted on the rim (1). Has become. Furthermore, each of the protrusions (22) has an oval cross section. And in some of them, screw holes (25) (25) are opened as shown in FIG.
As a result, the ring-shaped cover (24) can be attached.

Next, the rim (1) is a normal rim of 32 holes type, and in this embodiment, a nipple (6) as shown in FIG. 5 is adopted.

The nipple (6) includes a tightening screw (61) inserted into a nipple hole (11) penetrating the rim (1) in a radial direction, and a locking body (62) having a flange portion at one end of a shaft portion. ) And the tightening screw (61) is screwed into the shaft portion of the locking body (62) at a right angle in a penetrating state.

These nipples (6) (6) are mounted in the respective nipple holes (11) so that they are alternately oriented in opposite directions, and the head of the tightening screw (61) is located outside the nipple hole (11) in an enlarged space. It is housed in.

Between the rim (1) and the hub (2) configured as described above, a thin string (H) made of polyaramid fiber and having a flat cross section is used as a spoke (3) or an auxiliary spoke (4). To be done. In some cases, a fiber material impregnated with a synthetic resin can be used.

The tensioning of the spokes (3) and the auxiliary spokes (4) is performed on each side of the wheel. The actual tensioning will be described below.

First, the rim (1) and the hub (2) are fixed in a concentric state in advance as shown in FIG. 6, and the thin string (H) described above is stretched on one surface of the wheel. ) And the hub (2) are fixed, the number of nipples (6) and (6) whose flanges are located in the same direction as the protrusions (22) and (22) provided on one of the flanges (21) is 16 It is an individual. The nipples (6) (6) attached to the rim (1) are the hub (2).
The fixed posture is set so as to face the middle of the protrusions (22) (22).

In this fixed state, as shown in the figure, one end of the above string (H) is locked to one projection (22), and then this projection (2)
2) Hook this string (H) to the locking body (62) of the nipple (6) located at a position shifted by one half clockwise from the position opposite to the position (2) and return it to the hub (2) side. ) Is wound counterclockwise around the projection (22) that is displaced by 3 clockwise from) and locked, and then the projection (2
Lock the string (H) around 2) by winding it clockwise. After that, when the above procedure is repeated 16 times, 32 strings (H) are stretched between the hub (2) and the rim (1), and these spokes (3 ) (3) will function.

In this embodiment, as described above, the size and shape of the protrusions (22) are set appropriately, so that the spokes (3) are parallel to the tangent line of the hub (2) at the completion of the tensioning. Will be stretched over.

Next, as described above, when the tensioning of the string (H) in the radial direction is completed, the string (H) extended from the final end is stretched in the string direction.

In this embodiment, six auxiliary spokes (4) and (4) are stretched from one nipple (6). For this reason, first, as shown in FIG. 7, 16 nipples (6) and (6) are locked from one nipple (6) in the clockwise direction at every third eye and three rounds are made. Then, as shown in FIG. 8, the string (H) is stretched from one nipple (6) to the fifth nipple (6) in a clockwise direction so as to make five turns. The string (H) will now return to the original nipple (6). After that, as shown in the figure, when the cover (24) is screwed by winding the string (H) so as to be locked by all the nipples (6), as shown in FIG. Is completed, and the central portion is protected by the cover (24).

Then, eight strings (H) are extended from each nipple (6), and each string (H) stretched is symmetrical with respect to the radial line of one nipple (6). As a result, the two mutually symmetrical parts in the central portion become the spokes (3) and (3), and the other six auxiliary spokes (4) and (4).

When the string (H) is stretched as described above, if the tension is applied to the string (H) made of a synthetic resin to be the spokes (3) or the auxiliary spokes (4) while a constant tension is applied, The tension of each spoke (3) and the auxiliary spoke (4) becomes constant at the next point after completion of the tensioning.

The string (H) is also stretched on the other surface of the wheel in the same procedure as described above.

When the spokes (3) and the auxiliary spokes (4) are stretched on both sides of the wheel, the rim (1) and the hub (2) are integrated to complete the wheel.

In the wheel of this embodiment, the spokes (3) and the auxiliary spokes (4) are composed of a string (H) made of polyaramid fiber having high tensile strength. Moreover, the string (H) is a twisted or untwisted fiber bundle composed of several tens of fine wires. Further, each nipple (6) is provided with six auxiliary spokes (4) and (4). Therefore, the wheels of the above-described embodiment employing these configurations are wheels that are sufficiently lighter than the conventional spoke wheels and have improved impact resistance.

For reference, when a constant impact force in the radial direction is applied to the wheel, comparing the conventional spoke wheel with the wheel of the above-described embodiment, the spoke in which the maximum stress occurs, that is, the two wheels facing the load point and The four stress levels in the direction perpendicular to that were reduced to 40% in the above-mentioned embodiment, and even in the auxiliary spokes, the tension was distributed and dispersed over 11 circumferences including the vicinity of the load point. .

In the first embodiment described above, since the ring-shaped cover (24) is attached to the outer surface of the annular plate (R), the protrusions (22) and (22) are covered with the protrusion (22) (22). 22) It is possible to eliminate the unsightly appearance in which the string (H) locked to (22) and these protrusions are exposed. Further, the string (H) of this portion locked by the protrusion (22) is also protected.

[Regarding the second embodiment] In the first embodiment, only the string (H) made of a fiber material that functions as the spoke (3) or the auxiliary spoke (4) is placed between the hub (2) and the rim (1). Although it was constructed to stretch,
A disc-shaped disc as shown in FIG. 9 may be stretched between the hub (2) and the rim (1).

Therefore, the disk will be described in detail below.

This disc has an annular plate (R) and a cover (24) in the center.
And spokes (3) and auxiliary spokes (4)
Is covered with a synthetic resin sheet.

As shown in FIG. 10, this disc has a structure in which a cord (H) to be a spoke (3) and an auxiliary spoke (4) is built in a covering member (5) made of a synthetic resin sheet. The following method is used to manufacture such a disc.

First, the string (H) is stretched in the same manner as in the first embodiment.
Therefore, in this embodiment, the special configuration shown in FIG. 11 and FIG.
Use a jig (J) as shown in Fig. 12.

The jig (J) is a disc having pins (P) and (P) arranged in an array corresponding to the 16 nipples (6) (6) located on one side of the wheel, and an annular plate (R) at the center. ) Can be mounted and fixed. The jig (J) is rotatably supported and is supported so as to be movable in two directions of the X axis and the Y axis on a plane. For this reason,
As shown in the figure, the jig (J) is provided in the shape of a disc on the periphery of the substrate, and the pins (P) and (P) are provided on the substrate to form an annular recess (82) at the center. The holding shaft (81) is projected upward, and the holding shaft (81) is matched with the inner diameter of the central opening of the annular plate (R).

Therefore, when the annular plate (R) is fitted onto the holding shaft (81) in a proper posture, the protrusions (22) (2) (2) of the annular plate (R) are moved as described above.
The middle part of 2) faces the pins (P) and (P). Further, the annular flat surface on which the protrusions are arranged coincides with the surface of the jig (J).

Further, the jig (J) is rotatably supported by a support plate (8), and this support plate is supported by a pair of rails (83) (83) in the X-axis direction arranged on the upper surface of the table (T). It is slidably supported in the rail arrangement direction. As a result, the rails (83) (83) and the support plate (8) are X-shaped.
Attenuate evenly in the axial direction. And the rail (83)
The lower surface of the table (T) provided with (83) is a pair of rails (84) in the Y-axis direction provided on the support frame (80) therebelow.
(84) and Sumi is the even number. From the above, the jig (J)
Are paired with the support frame (80) in a plane.

The annular plate (R) is set in an appropriate posture on the jig (J) configured as described above, and first, the synthetic resin sheet (50) on the inner surface side that constitutes the covering member (5) is attached to the jig (J). ).

The synthetic resin sheet (50) is made of a thermoplastic synthetic resin, and in this embodiment, a polyethylene terephthalate resin (PET resin) sheet is used. Then, as shown in FIG. 13, the overall shape is a disk shape, and the periphery thereof is
Sixteen through holes (51) (51) each having a size for inserting the nipples (6) (6) are arranged at equal intervals, and pins (P) (P) of the annular plate (R) are provided in the central portion. A circular opening (52) that fits outside is disposed in the area. Therefore, when the through holes (51) and (51) are externally fitted to the pins (P) and (P), respectively, and attached to the upper surface of the jig (J) as shown in FIG. 12, the circular openings (52) are projected. (22) It will be set so as to be fitted onto the area of (22).

In this manner, with the synthetic resin sheet (50) attached to the upper surface of the jig (J), the string (H) is provided between the projections (22) and (22) and the pins (P) and (P), and between the pins (P) ( P) Tension between each other. At this time, the string (H) pulled out from the reel (85)
Is stretched between the projections (22) (22) and the pins (P) (P) via the weight (W). Also, a certain torque is applied to the reel (85) in the winding direction. Then, the jig (J) is moved in the direction in which the string (H) is stretched, and the string (H) is stretched in the same procedure as in the above-described first embodiment. (H) will be stretched.

A synthetic resin sheet (50) having the same structure as the synthetic resin sheet (50) is provided from above the jig (J) which has been stretched.
Are stacked from above, and integrated with the synthetic resin sheet (50) on the back side by ultrasonic welding or heat welding, and the cover (24) is screwed to the annular plate (R), and the disc as shown in FIG. 9 is obtained. Is completed.

In this disc, as shown in FIG. 10, an annular plate (R) covered with a cover (24) is located at the center, and synthetic resin sheets (50) (50) on the front and back sides constitute a covering member (5). In addition, the spokes (3) (3) and the auxiliary spokes (4) made of the string (H) are provided in the covering member (5).
(4) is built in. The intersections of the spokes (3) and the auxiliary spokes (4), the intersections of the spokes (3) and (3), and the intersections of the auxiliary spokes (4) and (4) are integrally connected.

[Other Modifications of Main Part]. Components of Each Spoke The spokes (3) (3) of any of the above embodiments
The cord (H) made of polyaramid fiber was used as the auxiliary spokes (4) and (4), but it may be carbon fiber, high-strength polyethylene fiber, glass fiber, or other high-strength fiber, and in some cases, metal wire or the like. Can also be used.

． Covering member (5) As the covering member (5), a sheet or film made of nylon resin, polypropylene resin, polyimide resin, fluorine resin, etc. in addition to the PET resin described above, and further a composite sheet of a fiber material and the synthetic resin Alternatively, it may be a film, or a knitted sheet or a woven sheet of a fiber material. In the case where these sheets or films cannot be welded, an adhesive can be used to bond them to the string (H).

Further, in the case of a wheel of a type that does not use the covering member (5), the effect of the invention of claim 3 is exhibited by connecting or adhering the intersections of the spokes.

． Arrangement of Covering Member (5) In the above-mentioned embodiment, the synthetic resin sheets (50) are arranged on both sides of the spoke stretched area, but they may be arranged only on the front side. As shown, each string (H)
You may make it open the center part of the area enclosed by (H).

Furthermore, the annular synthetic resin sheet (50) may be attached only near the periphery of the annular plate (R). Although this can be implemented as a wheel, it is not suitable as a component of a disk. This is because the mounting portion on the peripheral edge of the disc is simply a set of strings (H).

Therefore, in the case of manufacturing a disk of a type in which a synthetic resin sheet is partially attached, as a single component, as shown in FIG. 15, the auxiliary spoke arrangement area on the peripheral edge of the disk and the area near the end are combined. A configuration in which the resin sheets (50) (50) are annularly covered can be adopted.

． Coupling Structure of Rim (1) and Spoke In the first and second embodiments described above, the spoke and the rim (1) are connected by the nipple (6) shown in FIG. 6), as shown in FIG. 16, a locking body (62) having a hook on one side
And a tightening screw (61) screwed to the shaft portion of the locking body may be adopted. Also in this case,
It functions similarly to the above embodiment.

In addition, an annular body (30) made of steel wire is provided around the disk.
As shown in FIG. 17, in the structure including the above, an insertion hole (63) penetrating in a direction perpendicular to its axis is formed at the tip of the cylindrical locking body (62), The annular body (30) may be passed through this, and the tightening screw (61) inserted into the rim (1) may be screwed into the locking body (62). With this nipple (6),
As shown in FIG. 18, the string (H), which becomes the spokes (3) (3) or the auxiliary spokes (4) (4), should be wound around the shaft portion of the locking bodies (62) (62). Connected to the nipple (6). Then, at this time, a part of the annular body (30) near the nipple also exhibits the function of locking the string (H) serving as each spoke.

． Coupling of spokes (3) (3) and hub (2) In the previously described embodiments, hub (2) and spoke (3).
Although the annular plate (R) having the projections (22) and (22) is adopted for coupling with (3), the projections (22) and (22) may be provided on the cover (24) side. Good.

Furthermore, as shown in FIG. 19, a string (H) as a spoke (3) (3) is attached to an annular protrusion (26) provided on the hub (2).
(H) may be wound, and the wound portion may be bonded and integrated with the string (H) and the annular projection (26). In the case where the disk unit has the spoke tension structure having such a structure, the annular plate (R) is provided with the annular protrusion (26), and the covering member (5) is formed as in the second embodiment. ) Covers the stretched areas of the spokes (3) (3) and the auxiliary spokes (4) (4). When it is used as a wheel, the annular plate (R) is screwed to the hub (2), and the rim (1) is attached to the periphery of the disk by the nipple (6).
When coupled to the disc, the disc is attached to the rim (1) and the hub (2).
It will be installed between and.

． Others Each spoke is stretched in a state in which a constant tension is applied at least when it is configured as a wheel.
In the state of the disk alone, it is possible to adopt a configuration in which tension is not applied to each spoke.

[Brief description of drawings]

1 is a front view of the first embodiment of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is a detailed view of a hub (2) portion, FIG. 4 is its front view, and FIG. 5 is a nipple. (6) Exploded perspective view, 6th
Figures 8 to 8 are explanatory views of the procedure for tensioning the string (H), FIG. 9 is a plan view of the second embodiment, FIG. 10 is a cross-sectional view of the main part thereof, and FIGS. 11 and 12 are strings. FIG. 13 is a plan view of a synthetic resin sheet (50) used for the disc of the second embodiment, and FIG. 14 is a schematic view of the installation of the synthetic resin sheet (50). FIG. 15 is an explanatory view of a modified example of the wheel, FIG. 15 is an explanatory view of a modified example of the second embodiment, FIGS. 16 to 18 are explanatory views of another example of the nipple (6), and FIG. 19 is a spoke (3 ) (3) and hub (2)
It is explanatory drawing of the other example of a coupling structure with, and in the figure, (1) ...... rim (2) ...... hub (3) ...... spoke (4) ...... auxiliary spoke (5) ...... covering member ( 50) …… Synthetic resin sheet (R) …… annular plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-67104 (JP, A) Actual opening 61-158502 (JP, U) Actual opening 61-244603 (JP, U) Actual opening 13- 3903 (JP, Y1) Jikken 16-9809 (JP, Y1) Patent 87168 (JP, C1)

Claims (4)

[Claims] 1. A plurality of spokes (3) (3) for transmitting rotational force are stretched between an annular rim (1) and a hub (2) in a predetermined tension-applied state, and the rim (1) is stretched. In a wheel of the type in which tension is applied to the spokes (3) when an external force is applied to the rim (1), the rim (1) passes through a position separated from the hub (2) and directly connects the inner circumferences of the rim (1). ) A plurality of auxiliary spokes (4) stretched in a predetermined tensioned state in conformity with the direction of a plurality of kinds of strings are arranged in substantially equal parts over the entire inner peripheral side of the rim (1), and the spokes ( A wheel in which 3) and the auxiliary spokes (4) are made of a fiber material having high tensile strength. 2. The spokes (3) in which at least the entire outer peripheral region in the vicinity of the hub (2) of the stretched regions of the spokes (3) and the auxiliary spokes (4) are covered with a sheet-shaped or film-shaped covering member (5). A wheel according to claim 1, wherein the wheel is integrally combined with the auxiliary spoke (4). 3. The wheel according to claim 2, wherein a sheet-shaped or film-shaped covering member (5) is coated over the entire stretched region of the spokes (3) and the auxiliary spokes (4). 4. A disc-shaped disc stretched between an annular rim (1) and a hub (2), wherein an annular plate (R) attached to the hub (2) is located at the center. At the same time, a mounting portion for mounting the disc on the rim is provided at a position where the peripheral edge of the disc is divided into a plurality of portions, and a plurality of spokes (3) are stretched between the mounting portion and the annular plate (R).
A large number of auxiliary spokes (4) passing through a position deviated from the annular plate (R) and stretched so as to match the chord direction of the rim (1) are arranged between the mounting portions arranged on the periphery of the disc. The spokes (3) and (3) and the auxiliary spokes (4) and (4) are made of a fiber material having a large tensile strength, and the entire area where the spokes are arranged is a sheet-shaped or film-shaped annular covering member ( Disc for wheel integrated with 5).