JPH0725202A - Bicycle wheel - Google Patents

Abstract

PURPOSE:To prevent the generation of erroneous working in the insertion of a spoke into a spoke hole in the assembly of a wheel, as for the wheel of a bicycle which is constituted so that the spoke is laid in the laterally tilted attitude at the center part on the inner peripheral side of a rim. CONSTITUTION:An engaged part 1a where the head part 2 of a nipple 2 is engaged is formed by forming the center part on the inner peripheral part of a rim 1 to an arcuate shaped section, and the head part 2a is formed to a semispherical shape fitted with the engaged part 1a, and at the engaged part 1a, spoke holes 11 are formed by forming the slot holes parallel to the axis line of the rim 1 in a prescribed pitch, and the longer diameter of each spoke hole 11 is set longer than the interval at the center part on the inner peripheral side of each rim 1 of the left and right spokes.

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]

[Prior Art and its Problems] A spoke type bicycle wheel has a large number of spokes (3) (3) between the left and right flanges (41) (41) of the hub (4) and the rim (1). Usually, as shown in FIG. 1, one of the spokes (3) is attached to each engaged hole arranged at a predetermined pitch on the peripheral edge of the flange (41) (41). While engaging the bent head (31) provided,
The nipple (2) inserted into each spoke hole (11) arranged at a predetermined pitch on the inner peripheral side apex of the rim (1)
It is configured to be screwed into a screw portion (32) provided at the other end of (3).

In this conventional nipple (2), as shown in FIG. 2, an angular shaft portion (21) as a tool-corresponding portion is continuously provided at one end of a central body portion (22). At the same time, the other end of the central body portion (22) has a configuration in which a locking end portion (23) having a diameter larger than that of the central body portion (22) is continuously provided. The diameter of 22) is set to a size suitable for the spoke holes (11).

Therefore, when screwing the nipple (2), first, the nipple (2) is inserted into the spoke holes (11) from the outer peripheral side of the rim (1), and the angular shaft of the nipple (2) is inserted. Department (2
1) should be in a state of protruding from the rim (1) to the inner peripheral side. After that, the screw part (32) of the spoke (3) is attached to this nipple (2).
And the tool is made to correspond to the angular shaft portion (21) and rotated, so that the locking end portion (23) is moved to the spoke hole (11).
The nipple (2) is engaged with the rim (1) so as to prevent the nipple (2) from coming out of contact with the peripheral portion of the rim (1). In this bicycle wheel, the tension of the spokes (3) is adjusted by adjusting the screwing degree of each nipple (2) to make these tensions uniform.

In this bicycle wheel, each pair of left and right spokes (3) and (3) in a group of spokes (3) and (3) stretched to the left and right of the wheel are, as shown in FIG. 4) The side is inclined outward from the center line of the cross section. This is because each pair of left and right spokes (3) (3) on this wheel
This is because the triangular truss structure with (4) as the base is formed to secure the strength against the lateral load acting on this wheel.

Then, in order to ensure the inclined posture of the spokes (3) and (3) in the spoke attachment portion of the rim (1),
The cross section of the central portion on the inner peripheral side of (1) is formed so that the portions near the left and right of the center line incline downward, and as shown in FIG.
The spoke holes (11) (11) are alternately arranged on the left and right inclined portions. However, when assembling the spokes (3) (3) to the rim (1), the rim (1) is not attached to the left spoke (3) (3) group temporarily fixed to the hub (4). Left spoke hole
(11) (11) must be matched, and the right spoke (3) (3) group must also be matched with the right spoke hole (11) (11) of the rim (1), but usually each spoke Spoke holes in (3) (11)
Since it is manually inserted into the left spoke (3) (3) group, the left spoke (3) (3) group into the right spoke hole (11) (11), and the right spoke (3) (3) group into the left spoke. There was a problem that a work mistake such as inserting the hole (11) (11) was likely to occur.

[0007]

[Technical Problem] The present invention has been made in view of the above-mentioned problems. The spoke is provided at the center of the inner peripheral side of the rim (1).
(3) In the bicycle wheel of the type in which (3) is stretched in a posture inclined to the left and right, the spokes at the time of assembling the wheel.
(3) It is a technical subject to prevent an operation error in inserting the spoke holes (11) and (11) of (3) from occurring.

[0008]

[Technical Means] The technical means of the present invention taken in order to solve the above technical problem is that "the central portion of the inner peripheral side of the rim (1) is formed in an arcuate cross section so that the head of the nipple (2) is formed. (2a) and the engaged portion (1a) is engaged, the head (2a) is formed into a hemispherical shape that fits the engaged portion (1a), the engaged portion ( 1
In (a), long holes parallel to the axis of the rim (1) are provided at a predetermined pitch to make spoke holes (11) (11), and the long diameter of each of these spoke holes (11) is defined by the left and right spokes (3) (11). It was set longer than the interval at the center of the inner rim of rim (3).

[0009]

The above technical means of the present invention operates as follows. When assembling the spokes of this wheel, temporarily fix each spoke (3) to the hub, and
Insert the rim (1) side end of (3) into the spoke hole (11) from the inner circumference side of the rim (1), and insert the rim at the end of this spoke (3).
From the outer peripheral side of (1), screw the nipple (2). By this screwing, the head portion (2a) of the nipple (2) is pressed against the engaged portion (1a), and the head portion (2a) is in a state of being retained in the spoke holes (11). . This allows each spoke (3)
Is stretched.

In this case, each spoke hole (11) has a rim
It is a long hole provided in the engaged part (1a) so as to be parallel to the axis of (1), and the long diameter of each of the spoke holes (11) corresponds to the rims of the left and right spokes (3), (3). Since it is set longer than the space in the center of the inner circumference of (1), this spoke hole (1
1) is a spoke that is stretched in an inclined posture on the left and right sides.
(3) It can support any of (3).

[0011]

[Effects] The present invention having the above-described structure has the following unique effects. In this, the spoke holes (11) (11) can correspond to both the left side spokes (3) (3) group and the right side spokes (3) (3) group, so the spokes (3) (3) Spoke holes (1
1) When inserting into (11), the work error as in the above-mentioned conventional example cannot occur.

In the conventional example, even if the rim diameters are the same, the arrangement positions of the spoke holes (11) (11) differ depending on the flange spacing, flange diameter, etc. of the hubs to be combined. Rim individually according to size etc.
It was necessary to prepare (1), but in the present invention, among the various hubs that are supposed to be combined, the tensioned left and right spokes (3) and (3) are in the maximum inclined posture. By selecting and adapting to this and setting the major diameter of the spoke holes (11), a common rim (1) can be used for these various hubs.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. [Embodiment 1] In Embodiment 1, as shown in FIG. 5, the rim (1) is formed in a substantially trapezoidal cross section with the outer peripheral side being open, and the central portion on the inner peripheral side projects toward the inner peripheral side. The well part (12) formed in the semi-circular cross-section is the head (2a) of the nipple (2).
Is the engaged portion (1a) with which is engaged.

In the first embodiment, as shown in FIG. 4, the spokes (3) (3) connecting the rim (1) and the hub (4).
However, it is a bicycle wheel that is stretched in the radial direction of the rim (1). The rim (1) is connected to the well portion (12) having the semi-circular cross section, and the bead seat portions (13) (13) (13) connected to the outer sides of the well portion (12) so as to be substantially parallel to the axis of the rim (1). )When,
It is composed of a flange portion (14) formed in a slight taper which is continuous with each bead seat portion (13) and opens toward the outer peripheral side of the rim (1). Then, the head portion (2a) of the nipple (2) described later comes into contact with the outer peripheral surface of the well portion (12).

As shown in FIGS. 5 and 6, a spoke hole (11) for inserting the spoke (3) is formed in a certain area of the top of the well portion (12). The spoke holes (11) are continuously formed at a predetermined pitch in the circumferential direction of the rim (1). Further, each of the spoke holes (11) is a long hole in a direction parallel to the axis of the rim (1), and its long diameter is stretched between the hub (4) and inclined to the left and right. Is set slightly larger than the spacing in the well portion (12) of the spokes (3) (3), and the short diameter is
It is set slightly larger than the screw part (32) and shaft part of (3).

Further, the nipple (2) has a well portion (12).
A head side (2a) formed in a hemispherical shape on the side opposite to is a tool-corresponding shaft section (2b) connected to the opposite side of the head side (2a). . The radius of curvature of the head portion (2a) is adapted to that of the inner peripheral surface of the well portion (12). In the first embodiment, as shown in FIGS. 5 and 7, in the spoke (3), the pan-shaped locking head (34) is linearly connected to one end of the linear shaft portion, and Threaded end (32)
It is adopted that is connected. On the other hand, in the hub (4) with which these spokes (3) are engaged, the locking rings (40) (40) are formed to project outward at the peripheral edges of the flanges (41) (41) at both ends. The engaged rings (40) (44) for spokes are formed through the engaging ring (40) at a predetermined pitch in the circumferential direction.

Therefore, when each spoke (3) is inserted from the inner peripheral side of each locking ring (40) of this hub (4), this spoke (3) is inserted.
The locking head (34) of (3) is temporarily fixed to the locking ring (40) in a retaining state. On the outer peripheral side of the rim (1), as shown in FIGS. 4 and 5, a tube (C) and a tire (T) are provided.
Is installed. Therefore, a partition wall (15) for preventing the tube (C) from entering the space on the outer peripheral side of the well portion (12) is provided at the outer peripheral side end portion of the well portion (12), The partition wall (15) has openings (16) and (16) having a size into which the nipple (2) and a tool for screwing the nipple (2) can be inserted, and the spoke holes (11) ( It is formed in conformity with the arrangement pitch of 11). A bead hook portion (14a) having an arc-shaped cross section is formed at the open end of each flange portion (14) of the rim (1) so as to project inward, and the inner periphery of the tire (T) is formed. Edge bead (T ₁ ) (T ₁ )
Is engaged with the bead hook portion (14a) (14a) in a state of being in contact with the outer peripheral surface of the bead seat portion (13) (13),
(T) is mounted on the rim (1).

When assembling the spokes (3) (3) of the bicycle wheel, the engaging heads (34) of the spokes (3) are used as hubs.
After temporarily fixing to the retaining ring (40) of (4), insert the screw part (32) of this spoke (3) into the spoke hole (11), and insert the nipple () from the outer peripheral side of the well part (12). 2) Screw together. By this screwing, the spoke (3) is set in an inclined posture determined by the relationship with the hub (4), and substantially the entire surface of the head (2a) is covered with the inner peripheral surface of the well (12). The well portion (12) is engaged with the well portion (12) in a retaining state while being pressed against. still,
The tension of each spoke (3) is made uniform by adjusting the screwing degree of each nipple (2).

In this case, as described above in the section of the action, the spoke holes (11), (11) are either the left side spokes (3) (3) group or the right side spokes (3) (3) group. Can also be used. or,
In this case, the head (2a) covers a wide area (1
Since it will contact the outer peripheral surface of 2), the spoke holes (11)
It is possible to prevent inconveniences such as local deformation of the peripheral edge of the.

In the first embodiment, considering the combination with hubs of various sizes, the left and right spokes (3) and (3) stretched in these hubs have the maximum inclined posture. Select one and adapt it to the spoke holes (11)
The major axis of is set. This allows a common rim (1) to be used for these various hubs. [Embodiment 2] The above-mentioned Embodiment 1 is applied to a rim of which the outer peripheral side is open, and this Embodiment 2 is applied to a so-called tubular rim having a hollow cross section. .

In the second embodiment, as shown in FIG. 8, the apex on the inner peripheral side of the substantially triangular cross section is formed into an arcuate cross section so that the head (2a) of the nipple (2) is engaged. And the spoke hole (11) (1) in the engaged portion (1a) in the same manner as above.
1) is formed. And, on the outer peripheral side of this cross section, facing the respective spoke holes (11) and on the left and right spokes (3)
A long hole-shaped opening (18) is provided over a range slightly larger than the range sandwiched by the axis of (3) so that the nipple (2) and a tool for holding it can be inserted. The other configurations are the same as those in the first embodiment.

In this case, as in the first embodiment,
Although the spokes are assembled, when screwing the nipple (2), insert the tool-compatible shaft (2b) of the nipple (2) into the opening (18) while holding it on the tool. Will be screwed with the threaded portion (32) of the spoke. In any of the above embodiments, the head portion (2a) of the nipple (2) and the well portion (12) as the engaged portion (1a) of the nipple (2) are in direct contact with each other. , The well part (1
The head (2a) may be in contact with the washer (5) protruding from the outer peripheral surface of (2). This washer (5) is an annular body that is connected to the periphery of the spoke holes (11), and the side surface that contacts the head (2a) is formed into a curved surface that conforms to the outer shape of the head (2a). To be done.

Further, in any of the above embodiments, the spokes
(3) (3) is a type that is stretched in the radial direction of the rim (1), but it may also be a type that is crossed so that adjacent spokes (3) (3) intersect alternately. it can.

[Brief description of drawings]

FIG. 1 is an explanatory view of a conventional bicycle wheel.

FIG. 2 is a sectional view of a main part of a conventional example.

FIG. 3 is a top view showing the arrangement positions of the spoke holes (11) (11) of the conventional example.

FIG. 4 is a side view of the bicycle wheel according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part of the first embodiment.

FIG. 6 is a top view showing the arrangement positions of the spoke holes (11) (11) of the first embodiment.

FIG. 7 is a sectional view of essential parts showing engagement between the hub (4) and the spokes (3) and (3) of the first embodiment.

FIG. 8 is a sectional view of a main part of the second embodiment.

FIG. 9 is a cross-sectional view of the main part when the head (2a) is in contact with the washer (5).

[Explanation of symbols]

 (1) ・ ・ ・ Rim (2) ・ ・ ・ Nipple (3) ・ ・ ・ Spoke (2a) ・ ・ ・ Head (1a) ・ ・ ・ Engagement part (11) ・ ・ ・ Spoke hole

Claims (2)

[Claims] 1. Spokes (3) at the center of the inner periphery of the rim (1)
In a bicycle wheel of a type in which (3) is stretched in a posture in which the head (2a) of the nipple (2) is formed by forming the center part on the inner peripheral side of the rim (1) into an arcuate cross section. Engaged part to be engaged
(1a), the head (2a), the engaged portion (1a)
It is formed into a hemispherical shape that conforms to, and the engaged portion (1a) is provided with elongated holes parallel to the axis of the rim (1) at a predetermined pitch to form spoke holes (11) and (11). A bicycle wheel in which the major axis of the hole (11) is set to be longer than the interval at the inner peripheral side central portion of the rim (1) of the left and right spokes (3) (3). 2. The long diameter of the spoke hole (11) according to claim 1, which is adapted to the one in which the left and right spokes (3) (3) have the maximum inclination posture among the various hubs to be combined. Bicycle wheel as described.