JPH0732802A - Bicycle wheel - Google Patents

Abstract

PURPOSE:To fit spokes to a hub even if the spokes are extended to the radial direction of the hubs by constructing a bicycle wheel so that locked heads formed at one-side ends of the linear shafts of the spokes are engaged in a locked manner with spoke holes radially penetrating through locked rings ranging along the peripheral edges of the flanges of the hub. CONSTITUTION:A spoke 3 is formed into the shaft in a certain range from a locked head 34 to be a larger diameter portion 36. A spoke hole 24 is set large enough to insert the shaft of the spoke 3 therein when it is shifted from a boss 22 in tilted attitude, and the larger diameter portion 36 is set large enough to fit the spoke hole 24. The sum of the axial length of the larger diameter portion 36 and that of the locked head 34 is smaller than the radial dimension of a space between the boss 22 and a locked 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 As a bicycle wheel of this type, Japanese Patent Application No. 5-142255 has been proposed. As shown in FIG. 2 and FIG. 3, the hub ring (2) has an engaging ring (20) extending outward in the axial direction from the peripheral edges of the flanges (21) (21) at both ends thereof. In this locking ring (20), a large number of spoke holes (24) (24) are arranged at a predetermined pitch along the peripheral edge thereof, and each of the spoke holes (24) has a linear shaft portion. Insert the spoke (3) with the locking head (34) connected at one end to engage the locking head (34) with the inside of the locking ring (20) in a retaining state. The nipple (4) inserted into the spoke hole of the rim (1) is screwed into the threaded portion (35) continuously provided at the rim (1) side end of the spoke (3). The tension of each of the spokes (3) is set by adjusting the screwing degree of the nipple (4).

In this structure, the engaging head portion (34) and the shaft portion of each spoke (3) stretched between the hub body (2) and the rim (1) are linear. Therefore, the stress acting on the locking head portion (34) during traveling of the wheel is mainly only tensile stress. Therefore, in this bicycle wheel, each spoke
The tension of (3) can be set high. However, the hub body
As shown in FIG. 2, (2) has a structure in which the locking ring (20) projects outward from the peripheral edge of (21). A boss portion (22) through which the axle is inserted protrudes on the inner peripheral side of (20), and this boss portion (22) is slightly protruded from the end edge of the locking ring (20). Becomes

Therefore, as shown in FIG. 1, the spokes (3)
In a bicycle wheel in which (3) is stretched in the radial direction of the hub body (2) (spokes (3) (3) are stretched radially from the hub body (2) toward the rim (1)), If the diameter of the spoke holes (24) (24) formed in the retaining ring (20) is set to a value that exactly matches the axial diameter of the spokes (3), the boss portion (22) becomes an obstacle. The spokes (3) cannot be inserted into the spoke holes (24). That is, in the case of the above-mentioned tension type, the spokes (3) and (3) cannot be attached to the hub body (2).

[0005]

Technical Problem The present invention has been made in view of the above-mentioned problems, and relates to "a member projecting outward in the axial direction from each peripheral edge of the flanges (21) and (21) of the hub body (2). Retaining ring (20) and rim
Spokes (3) and (3) are stretched between (1) and each of the spokes (3) has a locking head (34) formed at one end of a linear shaft portion and a locking ring (20). A plurality of spoke holes formed through the hole in the radial direction
(24) Even if the spokes (3) (3) are stretched in the radial direction of the hub body (2) in a bicycle wheel of a type that is engaged with each of the (24) in a retaining state. The task is to be able to assemble the spokes (3) (3) to the hub body (2).

[0006]

[Technical Means] The technical means of the present invention taken to solve the above-mentioned problem is that "the spoke (3) is a locking head (34)".
The shaft portion within a certain range from is a large diameter portion (36), the size of the spoke holes (24), the spoke (3) of the spoke (3) in an inclined position positioned away from the boss (22). The diameter of the large diameter portion (36) is set to a size that fits into the spoke holes (24) while the shaft portion can be inserted.
(36) and the locking head (34) axial length, add the boss (2
It is set smaller than the radial dimension of the space between 2) and the locking ring (20). "

[0007]

The above technical means of the present invention operates as follows. When assembling the spokes (3) to the hub body (2), first set the spokes (3) in an inclined posture such that the shafts of the spokes (3) are off the boss (22).
Insert the tip end of (3) into the spoke hole (24).

In this case, since the spoke holes (24) are set to a size such that the shaft portions of the spokes (3) in the above state can be inserted, the boss portion (22) is obstructed during the insertion. do not become. Then, when the shaft portion is inserted, the large diameter portion (36) comes into contact with a part of the peripheral portion of the spoke hole (24) at a predetermined insertion position. Although the spokes (3) cannot be inserted above, the sum of the lengths of the large diameter part (36) and the locking head (34) should be between the boss (22) and the locking ring (20). Since it is set smaller than the radial dimension of the space, the posture of the spokes (3) can be changed in the circumferential direction of the hub body (2) within the space at this insertion position. At this insertion position, match its posture with the radial direction of the hub body (2),
After that, when the spokes (3) are pulled toward the outer peripheral side of the hub body (2), the large diameter portions (36) are just fitted and housed in the spoke holes (24). (See FIG. 7) As a result, the locking head portion (34) comes into contact with the peripheral edge portion of the spoke hole (24).
(3) is engaged with the retaining ring (20) in a retaining state.

After that, the rim (1) and the spokes (3) (3) are
The wheels are completed by using the nipples to fix and balance.

[0010]

[Effects] The present invention having the above-described structure has the following unique effects. In this case, even if the boss portion (22) has a dimensional relationship in which the boss portion (22) slightly protrudes from the end edge of the locking ring (20), the shaft of the spoke (3) is separated from the position apart from the boss portion (22). After inserting the part into the spoke hole (24), the spoke (3) can be engaged with the locking ring (20) by orienting the spoke (3) in the radial direction of the hub body (2). From the spoke
(3) When assembling a bicycle wheel of the type in which the hub (2) is stretched in the radial direction, the spokes (3) and (3) can be assembled.

After the assembly is completed, the fitting portions of the spoke holes (24) and (24) formed in the retaining ring (20) and the spokes (3) and (3) have a predetermined fitting without rattling. And the wheel strength will be sufficient.

[0012]

Embodiments of the present invention will be described below with reference to FIGS. In this embodiment, the present invention is basically applied to a bicycle wheel similar to the above-mentioned conventional example, but in this embodiment, the hub body (2) is moved toward the rim (1). The spokes (3) and (3) that are radially stretched are made of aluminum.

As shown in FIG. 4, the hub body (2) has flanges (21) and (21) which are curved from the central portion thereof to the left and right and project toward the outer peripheral side, and from the peripheral edges of the respective flanges (21). The locking ring (20) is formed so as to project outward in the axial direction and is in a posture substantially parallel to the axis of the hub body (2), and is formed to project outward from substantially the center portion of the inner peripheral wall of each flange (21). And flange (21)
And a boss portion (22) which is concentric with.

Then, on the inner peripheral surface of each of the locking rings (20),
Circumferentially along its perimeter, a groove (26) of generally semicircular cross section that fits the cross-sectional shape of the locking head (34) of the spoke (3) described below.
A plurality of spoke holes (24) (24) are formed through the bottom of the cross section of the groove (26) in the radial direction of the hub body (2) at a predetermined pitch. Further, in this embodiment, the diameter of each spoke hole (24) is determined by the spokes, as will be described later.
The diameter is set to a predetermined value in relation to the shaft of (3) and the locking head (34).

The spokes (3) are, as shown in FIG.
A hemispherical locking head (34) is connected to one end of a linear shaft main body having the same shaft diameter as a conventional steel wire spoke having a bent head, and the locking head (34 ) Is a large diameter portion (36) set to be thicker than the shaft main body, and the other end of the shaft main body has a screw portion (35) for screwing the nipple (4). Is provided. Then, the locking head (3
4) includes a pair of substantially triangular tongue pieces protruding laterally to the back.
(37) (37) are provided, each lower edge (38) of which is set substantially at right angles to the axis of the spoke (3).

The diameter of the large diameter portion (36) is set to a value (2.6 mm) larger than the diameter of a normal steel wire spoke, and the large diameter portion (36) of the spoke hole (24) is formed. The size is set to just fit (about 3.5 mm), and
The sum of the lengths of the large diameter part (36) and the locking head (34) is the boss part.
It is set smaller than the radial dimension of the space between the (22) and the locking ring (20). For example, in this embodiment, the boss
The distance between the (22) and the locking ring (20) is 19 mm, and the sum of the lengths of the large diameter part (36) and the locking head (34) is 15 mm.
It is set to mm.

Further, as mentioned above, the spokes (3) are made of aluminum, and in relation to the stress acting on the spokes (3) after being assembled as a wheel, Shaft diameter etc. are set. As shown in FIG. 4, the hub body (2) having the above structure accommodates the axle (6) through which the through hole (60) is inserted in the axial direction, and the hub body (2) is Bearing unit between this axle (6)
(5) By interposing (5), the hub body (2) is pivotally supported.

For this reason, the axle (6) has screw shaft portions (6
2) A certain range inside from (62) is the bearing unit
(5) It is a mounting shaft portion (63) for (5), and the inside of each mounting shaft portion (63) is a large diameter stepped portion (61). And
The mounting shaft portions (63) and (63) are arranged at intervals so that the mounting shaft portions (63) (63) are located inside the open end of the boss portion (22). The boss (22) and bearing unit (5)
The fitting tolerance of the outer ring (51) and the fitting tolerance of the mounting shaft portion (63) and the inner ring (52) of the bearing unit (5) are set to predetermined values. And bearing unit
In the mounted state of (5), the large-diameter step portion (61) and the inner ring (52)
And abut each other to position the bearing unit (5).

It should be noted that the screw shafts (62) (62) are provided with parallel flat parts.
(71) The inner nut (7) equipped with (71) and the outer hexagon nut (8) are screwed together, and the bearing unit (5) is set in the predetermined position of the axle (6) by the double nut method. It is fixed in the locking state. On the outside of the hexagon nut (8),
The screw shaft portion (62) partially protrudes, and this protruding portion serves as a fitting portion with the hawk claw. Then, in the state where the protrusions of the screw shaft portions (62) (62) and the fork claws are fitted, the through hole (60) of the axle shaft
The hub body is fixed by the fixing tool (quick lathe)
(2) (or wheels) are fixed to the hawk.

Further, the nipple used in this embodiment
As shown in FIG. 6, (4) includes a body portion (42), a tool-corresponding portion (41) continuously formed at one end of the body portion and having an outer peripheral surface formed in a square cross section, and the body portion (42). ) The locking end connected to the other end
(43) consists of the spokes on the inner peripheral surface.
A female screw that fits the screw part (35) of (3) is formed.
The rim (1) through which the nipple (4) is inserted has an inner peripheral wall (12) having an arcuate cross section, flange portions (13) and (13) protruding from both ends of the inner peripheral wall to the outer peripheral side, and each flange. And a bead hook portion (14) having an arcuate cross-section formed so as to project inward from the outer peripheral side end portion of the portion (13). Then, the inner peripheral wall (1
2) The rim (1) is formed with perforated holes (11) (11) for the nipple (4) at a predetermined pitch in the circumferential direction of the rim (1).
Each locked hole (11) is composed of a hole main body (15) and a large-diameter stepped hole (16) on the outer peripheral side of the hole main body (15). The diameter of the step hole portion (16) is adapted to the locking end portion (43) while being adapted to the (42).

The hub body (2), the rim (1) and the nipple (4) are made of aluminum so as to reduce the weight of the entire wheel. [Dimensions of Each Part] In the wheel of this embodiment, the rim
Although the diameter of (1) is set to about 600 mm, the dimensional relationship of the hub body (2) and the spokes (3) described above is set as follows.

.. Hub body (2) Left and right locking rings (20) (20) edge spacing = 70mm, left and right boss (22) (22) edge spacing = 78mm, locking ring (20) outer diameter = 76 mm, inner diameter of locking ring (20) = 65 mm, boss (22)
Outer diameter = 27 mm, spoke hole (24) inner diameter = 3.5 m
m, number of spokes attached = 18 (one side) x 2 = 36 Spoke (3) Total length of spoke (3) = 238 mm, shaft diameter = 2.0 mm,
Large diameter portion (36) diameter = 2.6 mm, large diameter portion (36) length = 12
mm, length of locking head (34) = 3 mm, diameter of locking head (34) = 4.5 mm [Assembly] Next, the hub body (2) and rim (1) having the above-mentioned configuration The following is a description of the fact that the spokes (3) and (3) are stretched between and.

First, in a state in which each of the spokes (3) is in an inclined posture in which the shaft portion thereof is located away from the boss portion (22), the screw portion (35) of the spoke (3) is attached to the spoke hole (24). ) To match. At this time, the spoke holes (24) are set to a size (3.5 mm) through which the shaft portion (shaft diameter = 2.0 mm) of the spokes (3) in the above-mentioned state can be inserted. As shown in (3), the shafts of the spokes (3) are inserted into the spoke holes (24) in the same posture.

Then, the large diameter portion (36) comes into contact with a part of the peripheral portion of the spoke hole (24). In this embodiment,
The total length of the large diameter portion (36) and the locking head portion (34) is 15 mm, and the radial dimension of the space between the boss portion (22) and the locking ring (20) is 1
Since it is set to 9 mm, the locking head portion (34) is located on the outer peripheral side of the boss portion (22) in this state. In this state, change the posture of the spokes (3) so that they match the radial direction of the hub body (2), and then move the spokes (3) to the hub body (2).
When pulled to the outer peripheral side, as shown by the alternate long and short dash line in FIG.
The large diameter portion (36) is housed in the spoke hole (24) and the spoke head (34) is housed in the groove (26).
Contact the peripheral edge of 4). Therefore, the spokes (3) are
It is engaged with (20) in a retaining state.

Further, the screw portion (35) of each spoke (3) is made to face a predetermined locked hole (11), and the tool corresponding portion (of the nipple (4) inserted into this locked hole (11) ( 41) Insert it at the end.
Then, when the tool-corresponding portion (41) is rotated while being held by the tool and the nipple (4) is screwed into the screw portion (35), as shown in FIG. The inside of the locking end portion (43) and the step hole portion (16) while being housed inside the portion (15) and the locking end portion (43) inside the step hole portion (16). By contacting the end face, the nipple (4) is engaged with the rim (1) in a retaining state.

Incidentally, when the above-mentioned screwing is carried out, FIG. 8 and FIG.
The locking head (34) of the spoke (3) is attached to the locking ring (2
The lower edge (38) of the tongues (37) (37) is housed in the groove (26) of the groove (0).
It is located on the center line of (26). In this state, in order for the lower edge (38) of the tongues (37) (37) to pivot in the groove (26), their abutting surfaces must be parallel, but the groove (2
Since 6) has a substantially semicircular cross section as described above, rotation of the spokes (3) is prevented. Therefore, when screwing the nipple (4), the spokes (3) do not rotate together.

Further, as described above, all the spokes
(3) After assembling (3), adjust the screwing degree of each nipple (4) to the spoke (3) to make the tension of each spoke (3) uniform. Is completed.
In this embodiment, the value of the tension is 50 kg
It is set to 60 kg (tension meter measurement value).

Since the bicycle wheel completed as described above is made of aluminum in its respective parts, the weight of the bicycle wheel is reduced by about 50% as compared with a steel wheel made of steel. There is. In the above embodiment, the flanges (21), (21) are curved from the central portion to the left and right, and are projected to the outer peripheral side. However, this is similar to the conventional example as shown in FIG. It may be a disk shape.

The hub body (2) is a bearing unit.
(5) Although it is axially supported via (5), this may be a normal type bearing mechanism in which a steel ball is interposed between the one and the ball push. (See FIG. 2) Furthermore, in the above embodiment, the locking head (34) of the spoke (3) is
The tongues (37) (37) and the groove (26) of the locking ring (20) prevent co-rotation of the spokes (3), but other configurations can be adopted. . Also, the tongue piece (3
As shown in FIG. 10, 7) and (37) need only project slightly, and in short, the locking head (34) housed in the groove (26) is centered around the spoke hole (24). Any protrusion may be used as long as it can prevent rotation.

The dimensions of each part shown in the above embodiment are not limited to the above, and may be any dimensions as long as they satisfy the dimensional conditions already described regarding the spoke assembly. Further, it goes without saying that the diameter of the large diameter portion (36) of each spoke (3) and the diameter of the other shaft portion are appropriately changed depending on the wheel size.

[Brief description of drawings]

FIG. 1 Bicycle wheel in a conventional example

FIG. 2 is a cross-sectional view of a main part of a hub body (2) of a conventional bicycle wheel.

FIG. 3 is a cross-sectional view of essential parts showing an engaged state of spokes (3) of a bicycle wheel of a conventional example.

FIG. 4 is a sectional view of an essential part of the hub body (2) of the embodiment of the present invention.

FIG. 5 is a side view of the spoke (3) of the embodiment of the present invention.

FIG. 6 is a cross-sectional view of essential parts showing the engagement between the nipple (4) and the rim (1) according to the embodiment of the present invention.

FIG. 7 is an operation explanatory diagram when the spokes (3) are inserted into the hub body (2).

FIG. 8 is an axial sectional view of the locking head (34) housed in the groove (26).

FIG. 9 is a circumferential sectional view of the locking head (34) housed in the groove (26).

FIG. 10: Spokes with tongues (37) (37) of another shape
Side view of (3)

[Explanation of symbols]

 (2) ・ ・ ・ Hub body (21) ・ ・ ・ Flange (20) ・ ・ ・ Lock ring (24) ・ ・ ・ Spoke hole (34) ・ ・ ・ Lock head (3) ・ ・ ・ Spoke ( 36) ・ ・ ・ Large diameter part (22) ・ ・ ・ Boss part

Claims (1)

[Claims] 1. A locking ring (20) and a rim which are projected outward in the axial direction from the peripheral edges of the flanges (21) (21) of the hub body (2).
Spokes (3) and (3) are stretched between (1) and each of the spokes (3) has a locking head (34) formed at one end of a linear shaft portion and a locking ring (20). A plurality of spoke holes formed through the hole in the radial direction
(24) In the bicycle wheel of the type in which each of (24) is engaged in a retaining state, the spokes (3) have a large-diameter portion of the shaft portion within a certain range from the locking head portion (34). 36), the size of the spoke hole (24) is set to such an extent that the shaft portion of the spoke (3) can be inserted in an inclined posture positioned away from the boss portion (22), and Set the diameter of the large diameter portion (36) to a size that fits the spoke holes (24), and
6) and the length of the locking head (34) in the axial direction, the boss (22)
A bicycle wheel set smaller than the radial dimension of the space between the lock ring (20).