Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1987-02-25
1989-01-24
Eley, Timothy V.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
2915901, 157 155, B21F 3900
Patent
active
047993049
DESCRIPTION:
BRIEF SUMMARY
INDUSTRIAL APPLICABILITY)
The present invention relates to a method for assembling a wheel for a bicycle.
BACKGROUND OF THE INVENTION (Prior Art and Problems Thereof)
Assembling steps for a wheel for a bicycle include:
In prior art, the aligning step is disclosed in subjected to leasing to the temporary tightening device is disclosed in
the fastening step for temporary tightened spokes is disclosed in.
U.S. Pat. Nos. 4,185,678, 4,187,895 and the like may also be listed.
These prior arts will now be described.
(1) Aligning step
See attached FIGS. 7 and 8:
In conventional aligning apparatus, as shown in FIG. 7, a temporary assembly (hereinafter referred to as a temporary assembly D) of a hub H and spokes prior to leasing is rotated at a rotational speed to an extent that a predetermined centrifugal force acts on the spokes to thereby radially align the spokes whereas an annular retaining body E provided concentrically with the temporary assembly D is rotated at the same speed as and in the same direction as that of the temporary assembly D to retain the aligned spokes in their attitude by means of a retaining portion of the retaining body E provided at a position coincided with a tip of the spoke.
As shown in FIG. 8, in the upper edge of the retaining body E are provided in a predetermined order a first notch 51 for retaining a first spoke 21 positioned on the upper surface side of one spoke mounting plate 11 of the hub, a second notch 52 for retaining a second spoke 22 positioned on the lower surface side, and a third notch 53 for retaining a third spoke 23 positioned on the upper surface side of the other spoke mounting plate 12 and a fourth notch 54 for retaining a fourth spoke 24 positioned on the lower surface side. Thus, when the upper end edge of the retaining body E is raised toward the spokes while rotating the retaining body E in the same direction as and at the same speed as the rotation of the hub when the respective spokes have been radially aligned by the rotation of the temporary assembly D, the spokes are fitted into the corresponding notches whereby the spokes of the temporary assembly D are held radially aligned.
However, in prior art arrangement, when the hub H of the temporary assembly D is rotated while maintaining it in the upright attitude, the relationship between the retaining body E and the hub has to be preset properly. More specifically, this involves an inconvenience that the temporary assembly D has to be set so that the first spoke mounting part in the spoke mounting plates and the first notch 51 of the retaining body E are radially opposed to each other.
This results from the fact that the respective spokes are to be retained by the notches formed in the upper end edge of the retaining body E while rotating the retaining body E and the hub H in the same direction and at the same speed.
(2) Leasing step (laced crossing step)
See attached FIGS. 10, 11, 12 and 13:
Spokes to be mounted on the hub H are divided into four kinds of spokes as noted below in terms of the relationship between a pair of first and second spoke mounting plates 11, 12 provided on the hub. (See FIGS. 10 and 11.)
First spoke extending from the outer surface side of the first spoke mounting plate 11 toward the rim R . . . 21.
Second spoke extending from the inner surface side of the first spoke mounting plate 11 toward the rim R . . . 22.
Third spoke extending from the inner surface side of the second spoke mounting plate 12 toward the rim R . . . 23.
Fourth spoke extending from the outer surface side of the second spoke mounting plate 12 toward the rim R . . . 24.
Among these four spokes, the first and second spokes 21 and 22 are extended in a crossed state from each other, and the third and fourth spokes 23 and 24 are mutually adjusted in a crossed state.
The method for mutually crossing a set of spokes (leasing method) as described above has already been proposed in Japanese Patent Publication No. 49762/1981. This conventional method is employed as a method for leasing spokes of a wheel for a motor cycl
REFERENCES:
patent: 3631577 (1972-01-01), Hasegawa
patent: 3758931 (1973-09-01), Patterson
patent: 4185678 (1980-01-01), Nagatomo
patent: 4187895 (1980-02-01), Saruwatari et al.
Araya Industrial Co., Ltd.
Chin Frances
Eley Timothy V.
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