JPH06219101A - Bicycle wheel - Google Patents

Abstract

PURPOSE:To improve strength of spokes, heighten rigidity of a wheel against a lateral directional load, and simplify assembling in a bicycle wheel in the shape of stretching the spokes between a rim and flanges of a hub body where the flanges are arranged in the both end vicinity of a hub cylinder. CONSTITUTION:Respective spokes 3 are constituted by providing a locking head part 34 on and end of a straight line shape shaft part, and a locking ring 20 projecting in the shaft line direction of a hub is arranged consecutively on the peripheral edge of a flange 21, and a large number of spoke holes 24 are formed penetratingly at prescribed pitch in this locking ring 20, and the respective spokes 3 are inserted in the spoke holes 24 from the inner peripheral side of the locking ring 20, and the locking head part 34 is engaged with the locking ring 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spoke type bicycle wheel.

[0002]

2. Description of the Related Art Conventional bicycle wheels are
As shown in FIG. 1, the flange of the hub body (2) in which plate-like flanges (21) (21) are projected from the vicinity of both ends of the hub cylinder (2a).
A large number of spokes (3) and (3) are stretched between the (21) and (21) and the rim. In this conventional type,
The wire (3) is made of wire and has a bent piece at one end.
(30) is provided, and the other end is a screw part for screwing the nipple.

The bent piece (30) of the spoke (3) penetrates the locked hole of the flange (21), and the screw portion is screwed into the spoke hole of the rim (1) by a nipple. Each spoke (3) is stretched between the flange (21) and the rim (1). Since the locking head (34) is formed at the tip of the bending piece (30), the spoke is held in the stretched state.
The bent piece (30) of (3) and the mounting hole of the flange (21) engage with each other in a retaining state.

The spokes stretched on one surface of the wheel.
(3) The respective spokes (3) of the (3) group are mounted in a posture in which they are circumscribed with respect to the mounting hole array portion formed in the flange (21), and they are in a relationship of intersecting with each other (hereinafter referred to as a crossed state )
Since these spokes (3) and (3) are attached to the first spoke (3a) where the locking head (34) is located inside the flange (21) and the outside of the flange (21). It is divided into the second spoke (3b) where the locking head (34) is located.

These first and second spokes (3a) (3b) are
Since the mounting postures are different as described above, the shapes are also different. That is, in the first spoke (3a), the bending angle of the bending piece (30) with respect to the straight line main body is set to an obtuse angle,
That of the second spoke (3b) is set to an acute angle. Therefore, in this conventional device, it is necessary to prepare two types of first and second spokes (3a) and (3b) as spokes, and there is a problem that parts cannot be shared.

Further, tension is repeatedly applied to each spoke during traveling. Therefore, the bending stress due to this tension and the shear stress are repeatedly applied to the bending proximal end of the bending piece (30), and the fatigue fracture is likely to occur due to the repeated stress. In this respect, there is a problem with the spoke strength. further,
The wheel as a whole has insufficient strength against lateral load.
As shown in FIG. 1, this is because the second bending point (31) of the bending piece (30) in the second spoke (3b) continuous to one surface of the wheel.
b) (31b) group and the second bending point (31b) (31
b) Since the distance (D2) to the group is smaller than the maximum distance (D) determined by the relationship with the wheel mounting portion by at least twice the length of the bending piece (30), one surface of the wheel 1st continuous spoke
The maximum distance (D1) between the group of the first bending points (31a) and (31a) of the bending piece (30) in (3a) and the group of the first bending points (31a) and (31a) continuous to the other surface is the maximum. The hub of the triangular truss structure part composed of the first and second spokes (3a) (3b) formed between the hub body (2) and the rim when viewed as a whole even if it is close to the distance (D). This is because the average value of the intervals on the body (2) side cannot be set sufficiently large.

[0007]

[Technical Problem] The present invention has been made in view of the above-mentioned problems. "The flange (21) is provided near both ends of the hub barrel (2a)."
In the bicycle wheel of the type in which the spokes (3) and (3) are stretched between the flanges (21) and (21) of the hub body (2) provided with (21) and the rim (1) ''. , The strength of each spoke (3) is improved, the rigidity of the wheel against lateral load is increased, and the production of the spoke (3) can be rationalized and the wheel assembly process can be simplified. That is the technical issue.

[0008]

[Technical Means] The technical means of the present invention taken to solve the above technical problem is that "each spoke (3) is provided with a locking head (34) at one end of a linear shaft. And then the flange
Around the periphery of (21), a retaining ring (20) protruding in the axial direction of the hub.
A plurality of spoke holes (24) and (24) are formed through the locking ring (20) at a predetermined pitch, and the spokes (3) are locked in the spoke holes (24). The locking head (34) is inserted from the inner peripheral side of the ring (20) so as to engage with the locking ring (20). "

[0009]

The above technical means of the present invention operates as follows. When a large number of spokes (3) (3) are stretched between the locking ring (20) (20) connected to the flanges (21) (21) and the rim (1), The spoke (3) has a locking head (3
4) is inserted into the spoke holes (24) (24) so as to be located on the inner peripheral side of the locking ring (20), and the opposite end is screwed into the nipple (N). Rim (1) gives up.

When riding a bicycle, a tensile force acts on each spoke (3), but the shaft of each spoke (3) and the locking head (34).
Since and are linear, only tensile stress mainly acts on the boundary with the locking head (34). The length of the triangular truss structure on the hub body (2) side, which plays an important role in the strength against the lateral load of the wheel, is determined by the spokes of the axial center of the spokes (3) that are continuous with each side of the wheel. Hole (24) (24) group spacing (D
3), which is larger than the average value of the interval (D1) and the interval (D2) in the above-mentioned conventional technique, so that the rigidity of the triangular truss structure portion is improved.

[0011]

[Effects] The present invention having the above-described structure has the following unique effects. Since the same shape can be used for each spoke (3), the spoke (3) can be streamlined in production and the hub body
It is possible to simplify the assembly of (2) and the spoke (3).

Further, since the principal stress acting on the boundary between each spoke (3) and the locking head (34) is only tensile stress, one end of the spoke (3) is bent ( The strength will be improved from the one described in 30). Therefore, the degree of fatigue fracture caused by repeated stress applied to each spoke (3) is reduced. Furthermore, since the distance (D3) on the hub body (2) side of the triangular truss structure is larger than the average value of the distance (D1) and the distance (D2), the rigidity of the wheel against the lateral load applied to the axle is increased. Is improved.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. Example 1 In Example 1, as shown in FIGS. 2 to 4,
A large number of spokes (3) and (3) are radially extended from a hub body (2) rotatably supported by a hub shaft (HL).

At the peripheral edges of the flanges (21) (21) provided at both ends of the hub body (2), there are locking rings (20) projecting in the axial direction of the hub and outward from the peripheral edges. In addition, a plurality of spoke holes (24) (24) are formed in the locking ring (20) along the peripheral edge thereof in the radial direction of the hub body (2) at a predetermined pitch. Each spoke (3) has a configuration in which a pan-head-shaped locking head (34) is provided at one end of the linear shaft portion, and this spoke (3) is a locking ring (3). It is inserted into the spoke holes (24) from the inside of 20 and is engaged with the retaining ring (20) in a retaining state. Then, a threaded portion (35) is provided at the end of the spoke (3) on the rim (1) side, and the threaded portion (35) has a rim (1).
The nipple (N) inserted in the spoke hole of is screwed.

In the above structure, the spoke holes (2
After inserting the spoke (3) from the inside of the retaining ring (20) into 4),
Insert the nipple (N) into the rim (1) on the thread (35) of the spoke (3).
When the tension of each spoke (3) is adjusted by screwing them in a manner of penetrating, and adjusting the degree of screwing, the spokes (3)
Assembly of (3) is completed. And, in the case of the bicycle wheel assembled as described above, as described in the section of the above-mentioned action, only the tensile force mainly acts on each part of each spoke (3) during traveling. Becomes

Further, the edge spacing of the left and right retaining rings (20) (20) is
It is set according to the positional relationship with gears and frames arranged on the side of the hub body (2), but since the edge has no unevenness in the axial direction, the locking ring ( 20) prevents the flange (21) from bending in the axial direction, so the locking ring (2
The distance between the edge of 0) and the frame can be set small. As a result, the distance between the spoke locking portions on the left and right locking rings (20) (20) side, that is, the base width of the above-mentioned triangular truss structure portion becomes larger than the conventional one.

In the above embodiment, there is a possibility that the spokes (3) may rotate together when the spokes (3) are assembled. The configuration shown can be adopted. As shown in FIG. 5 and FIG. 6, this has a retaining ring (20) in the retaining head (34) of each spoke (3).
The hemispherical base (34a) and the base (34a)
And a pair of tongues (6) and (6) protruding laterally from each other so as to be symmetrical to each other, and as shown in FIGS. 7 and 8, the locking ring in each spoke hole (24). At the inner open end of (20), concentric with the spoke holes (24) and said base (34a)
Is provided with a hemispherical recessed portion (26) of a size that fits in exactly, and a groove having a rectangular cross section that passes through the diameter line of these recessed portions (26) (26) and along the peripheral edge of the locking ring (20). (26a) is provided. The width of the groove (26a) is set so that the tongues (6) and (6) fit exactly.

In this case, the spoke (3) is provided with a spoke hole.
When the tongue pieces (6) and (6) are inserted into the groove (26a) and engaged with the tongue pieces (6) and (24), rotation of the spokes (3) is blocked by the engagement, and the nipple (N) The spoke (3) does not rotate together when the screw is screwed into the screw part (35). In addition, in order to increase the productivity of the hub body (2), the groove (2
6a) has a semi-circular cross section that matches the cross section of the base (34a), and the groove (26a) is fitted with the base (34a) of the locking head (34) and the tongue piece.
(6) (6) may be accommodated.

In this case, the spoke (3) is provided with a spoke hole.
When inserted into (24) and the locking head (34) is fitted and engaged in the groove (26a), the tongues (6) and (6) are located at the center of the groove (26a).
The posture is parallel to (26a). And in this state
Even if the turning force acts on the hook (3), the tongues (6) (6) are
Since it comes into contact with the center of the wall surface of a), the locking head (34) is not rotated any further. Therefore, the spokes (3) do not rotate together during the screwing. [Embodiment 2] Embodiment 2 shown in FIGS.
Spoke (3) (3) is installed on the spoke (3) (3) with a flange (21).
Tangential direction and adjacent spokes (3) (3) are crossed, and the locking head (34) is provided to prevent co-rotation of the spokes (3). Is a cylinder provided so as to be orthogonal to the linear shaft of the spoke (3), and
At the open end of the inside of the retaining ring (20) in the spoke hole (24), there is formed a recessed portion (27) formed in an arc-shaped cross section having a size to fit the retaining head (34). It is provided.

The concave portion (27) is formed continuously along the peripheral edge of the locking ring (20) on the inner peripheral surface of this peripheral edge, and one end thereof is open to the peripheral edge. An elongated hole as a spoke hole (24) substantially parallel to the peripheral edge is formed at a substantially central portion of the recess (27). In this one, the locking head (3
4) is engaged with the recess (27), the spoke is
Even if a rotational force acts on (3), the spokes will be engaged due to the engagement.
Since the rotation of (3) is blocked, co-rotation of the spoke (3) is prevented.

In this case, in order to make the spokes (3) and (3) into the above-mentioned traverse type, the spoke holes (24) and (2) which are adjacent to each other are provided.
The distance from the edge of the retaining ring (20) of 4) alternates with the spoke.
The configuration is shifted by the shaft diameter of (3). In the case of this bicycle wheel, the spokes (3) and (3) are tensioned, so that the hub body can be grounded while the wheels are grounded.
Even if the rotational drive force is applied to (2), the rotational drive force of the hub body (2) is effectively transmitted to the rim (1) side.

If the linear shaft portion near the engaging head portion (34) of the spoke (3) is made of a flexible material or shape,
The shift is unnecessary. Further, since the above-mentioned recessed portion (27) is shaped to open to the peripheral edge of the locking ring (20), the hub body (2)
Can be formed at the same time as forging. In the first and second embodiments described above, the locking flange (20) is configured such that the annular flange (22) is continuously provided on the inner peripheral side or the outer peripheral side of the edge of the locking ring (20). The strength against the radially outward force acting on the ring (20) is improved. Therefore, the spoke
(3) Even if a large tensile force is applied to (3), the retaining ring (20)
The edge of the will not be damaged. [Embodiment 3] Embodiment 3 shown in FIGS. 12 to 14 is to improve workability when assembling the spokes (3) and (3) to the hub body (2).

As shown in FIG. 12, this one has a spoke (3) between the linear shaft portion and the locking head portion (34) having a larger diameter than the shaft portion and the locking head portion (34). 34) A neck portion (36) with a smaller diameter than that of the hub body is provided from each spoke hole (24).
Form a slit (S) that opens at the edge of the retaining ring (20) in a direction parallel to the axis of (2), and make the width of this slit (S) slightly smaller than the diameter of the spoke (3). The diameter of the spoke hole (24) is set larger than that of the neck (36) and smaller than that of the neck (36).
6) is set to a diameter that allows just insertion.

In this one, the neck of the spoke (3)
Slide the linear shaft near the (36) into the spoke hole (24) by sliding it from the open end of the slit (S), and then slightly move the spoke (3) to the outer peripheral side of the locking ring (20). When pulled, the locking head (34) is set in the recess (26) and the neck (36)
Is engaged with the spoke hole (24), and the spoke (3) is engaged with the locking ring (20) in a retaining state.

Therefore, attach the long spokes (3) to the threaded parts (35).
The workability of assembling the spokes (3) is improved as compared with the first and second embodiments in which the spokes (24) need to be inserted through. And in this one, the spokes (3)
Is engaged with the retaining ring (20), the neck (36) moves into the spoke hole (2
4) It is in the state of being fitted and engaged in this state, but in this state, even if the outward force of the flange (21) acts on the spoke (3), the width of the slit (S) becomes smaller than the neck (36). The neck (36) is smaller than the diameter of the spoke hole (2).
4) There is no deviation from the inside of the slit (S), and the workability of the above assembly is further improved.

In addition, the spoke holes (2
It goes without saying that 4) can be a type having a slit (S). Further, in this type, as shown in FIG. 13, the locking ring (20) is attached to the flange (21).
It is configured to project outward from the peripheral edge of, and a dish-shaped reinforcing disk (C) having a hub tube (2a) insertion hole in the center is press-fitted into the open end of the locking ring (20). Alternatively, if it is configured to be tightly fitted by screw connection, each part of the edge of the locking ring (20) divided by the slit (S) will be connected, so that the locking ring (20) The strength against a radially outward force is improved.

Further, in this structure, since the open ends of the slits (S), which are exposed at the end edges of the locking ring (20), are covered with the reinforcing disc (C), the unsightly appearance of the exposed portion is eliminated. It The reinforcing disk (C) can be used for other than the third embodiment. Furthermore, by adopting the configuration of the third embodiment, as shown in FIG. 14, the locking rings (2) continuously provided on the peripheral edges of the flanges (21) (21) at both ends of the hub body (2).
The protruding direction of 0) may be inward from the peripheral edge. [Embodiment 4] In Embodiment 4 shown in FIG. 15, the slit (S) in Embodiment 3 is formed from each spoke hole (24) to the flange (21).
It is formed over the range to the outer peripheral part of the flange (21) and passes through the end opening (28) of the slit (S) in the flange (21) up to the locking head (34) and neck (36) of the spoke (3). It has a shape that allows it.

This is assembled in the same manner as the third embodiment, and the outer edge of the retaining ring (20) is not divided by the slit (S) as in the third embodiment.
The strength of this locking ring (20) is improved.

[Brief description of drawings]

FIG. 1 Hub body (2) and spokes (3) (3) in the prior art
Explanatory diagram showing engagement with

FIG. 2 is an explanatory diagram showing the configuration of the hub body (2) in the first embodiment.

FIG. 3 is an explanatory view of a method of tensioning the spokes (3) and (3) between the rim (1) and the hub body (2).

FIG. 4 is an explanatory view showing a state in which the hub body (2) is pivotally supported by the hub shaft (HL).

FIG. 5: Side view of spoke (3)

FIG. 6 is a front view of the spoke (3).

FIG. 7 is a cross-sectional view of a main part showing a recess (26).

FIG. 8 is a sectional view of a main part showing a groove (26a).

FIG. 9 is a sectional view of an essential part of a locking ring (20) of Example 2.

FIG. 10 is a cross-sectional view of essential parts showing engagement of the locking head portion (34) and the recessed portion (27) of the second embodiment.

FIG. 11 is a side view of an essential part showing an intersection of the spokes (3) and (3).

FIG. 12 is an explanatory view of essential parts showing a spoke (3) and a locking ring (20) of Example 3.

FIG. 13 is a cross-sectional view of the main part of the locking ring (20) which has reinforced the entire edge.

FIG. 14 is an explanatory view showing another form of the flange (21) (21).

FIG. 15 is an explanatory view of the essential parts showing the spokes (3) and the locking ring (20) of the fourth embodiment.

[Explanation of symbols]

 (1) ・ ・ ・ Rim (2) ・ ・ ・ Hub body (3) ・ ・ ・ Spoke (2a) ・ ・ ・ Hub tube (21) ・ ・ ・ Flange (24) ・ ・ ・ Locked hole ( 34) ・ ・ ・ Locking head (S) ・ ・ ・ Slit (28) ・ ・ ・ End opening (C) ・ ・ ・ Reinforcing disk

[Procedure amendment]

[Submission date] July 14, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

In the above embodiment, there is a possibility that the spokes (3) may rotate together when the spokes (3) are assembled. The configuration shown can be adopted. As shown in FIG. 5 and FIG. 6, this has a retaining ring (20) in the retaining head (34) of each spoke (3).
The hemispherical base (34a) and the base (34a)
A pair of generally triangular tongues protruding laterally from (6)
(6) and its lower edge (61) is the axis of the spoke (3)
Is set at a right angle to. In addition, FIGS. 7 and 8
As shown in, the open end of the inner retaining ring (20) in each spoke hole (24), spoke holes (24) concentric with and said base (34a) just fits Komu size of hemispherical Recesses (26)
Is provided, and a groove (26a) having a rectangular cross section is provided so as to pass through the diameter lines of the recessed portions (26) (26) and along the peripheral edge of the locking ring (20). The width of this groove (26a) is the width of the tongue (6).
(6) is set to fit exactly.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

In this case, the spoke (3) is provided with a spoke hole.
When the tongue pieces (6) and (6) are inserted into the groove (26a) and engaged with the tongue pieces (6) and (24), rotation of the spokes (3) is blocked by the engagement, and the nipple (N) The spoke (3) does not rotate together when the screw is screwed into the screw part (35). The above hub body
In order to increase the productivity of (2), the groove (26a) is formed in the base (3
A semi-circular cross section that matches the cross section of 4a), and this groove (26a)
The base portion (34a) of the locking head portion (34) and the tongue pieces (6) and (6) may be housed inside. In this case, the same as in the above embodiment
At the bottom center of the groove (26a) cross section, the spoke holes (24) (24)
However, as described above, the base (34a) is formed.
Is a hemisphere, its cross section and the semicircle of the groove (26a)
This groove (26a) is
It also functions as a recess (26).

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

In this case, the spoke (3) is provided with a spoke hole.
When it is inserted into (24) and the locking head (34) is fitted and engaged in the groove (26a), the lower edges (61) of the tongues (6) and (6 ) are aligned with the groove (26a).
It will be located on the center line of the cross section. In this state,
The lower edge (61) of the tongues (6) (6) of the swivel in the groove (26a)
Grooves (26a) although their facing surfaces must be parallel
Is a semi-circular cross section as described above,
Rotation is blocked. Therefore, at the time of screwing,
Ku (3) does not rotate together. [Embodiment 2] Embodiment 2 shown in FIGS.
Spoke (3) (3) is installed on the spoke (3) (3) with a flange (21).
Tangential direction and adjacent spokes (3) (3) are crossed, and the locking head (34) is provided to prevent co-rotation of the spokes (3). Is a cylinder provided so as to be orthogonal to the linear shaft of the spoke (3), and
At the open end of the inside of the retaining ring (20) in the spoke hole (24), there is formed a recessed portion (27) formed in an arc-shaped cross section having a size to fit the retaining head (34). It is provided.

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

Claims (7)

[Claims] 1. A flange (21) (2) near both ends of the hub barrel (2a).
The flange (21) (21) and the rim of the hub body (2) in which 1) is arranged
In a bicycle wheel in which the spokes (3) and (3) are stretched between the spokes (3) and (1), each spoke (3) has a locking head (34) at one end of the linear shaft. With the above configuration, a locking ring (20) protruding in the axial direction of the hub is continuously provided on the periphery of the flange (21).
This spoke ring (20) has a large number of spoke holes (24) at a specified pitch.
(24) is formed so that the spokes (3) are inserted into the spoke holes (24) from the inner peripheral side of the locking ring (20), and the locking heads (34) are locked. Bicycle wheel adapted to engage the annulus (20). 2. The retaining ring (20) and the retaining head (3) of the spoke (3).
The bicycle wheel according to claim 1, wherein a detent means is interposed between the wheel and the bicycle wheel. 3. The detent means comprises a retaining ring (20) and a retaining head (3).
4) a groove (26a) formed on the inner peripheral surface of the locking ring (20) at a portion facing the locking ring (20) and the groove (2a) protruding from the locking head (34).
A bicycle wheel according to claim 2, characterized in that it comprises a tongue (6) fitted inside. 4. The locking means comprises a substantially cylindrical locking head (34) orthogonal to the shaft of the spoke (3), and a hub on the inner peripheral side of both ends of the locking ring (20). A bicycle according to claim 2, in combination with a recess (26) having an arcuate cross section which is arranged parallel to the axis of the body (2) and accommodates a part of the cross section of the locking head (34). Wheels. 5. A slit (S) that opens from the end of the retaining ring (20) is formed from each spoke hole (24), and this slit (S) is formed.
The bicycle wheel according to any one of claims 1 to 4, wherein the width of the wheel is set to be slightly larger than the shaft diameter of the spoke (3) and smaller than the locking head (34). 6. The slit (S) is formed over the range from each spoke hole (24) to the outer periphery of the flange (21), and the end opening (28) of the slit (S) in the flange (21). The bicycle wheel according to claim 5, wherein the size of the wheel is set so that the locking heads (34) of the spokes (3) can be loosely inserted. 7. A dish-shaped reinforcing disk (C) having an axle insertion hole at the center thereof, wherein a retaining ring (20) is projected outward from the peripheral edge of the flange (21), and a dish-shaped reinforcing disc (C) is provided on the retaining ring (20). The bicycle wheel according to any one of claims 1 to 5, which is tightly fitted on the open end.