JPS601090A - Plastic pedal for bicycle or similar article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plastic pedal for a bicycle or the like.

It is known to construct pedals with a pedal body of plastic material that rotates on a metal shaft via a pole bearing, needle bearing or telescoping ring.

This type of pedal cannot be expected to be highly reliable because of the large stress that is directly applied to each part of the pedal body and promotes wear.

Additionally, these pedals have a relatively high cost due to their construction and assembly time.

The pedal aimed at by the invention acts directly on the corresponding contour of a plastics material sleeve remolded on a metal shaft of standard diameter to obtain a friction diameter by its shape, thereby reducing the contact pressure caused by the stresses on said pedal. The object of the present invention is to obtain a pedal with a pedal body of plastic material with holes that achieves a compromise between the strength of the plastic material used.

According to another feature of the invention, the complementary mating surfaces of the hole of the pedal body and the sleeve are formed into a step-like continuous cylindrical shape during molding to avoid molding gaps that are likely to cause bulges, especially for wear resistance. It is formed tangentially while preserving the surface layer.

According to another feature of the invention, the pedal body has, along its hole, an inner flange which cooperates with two reliefs formed on the sleeve and which retain the pedal body laterally with a minimum of play. ing.

According to another feature of the invention, the pedal body can be fixed transversely to the shaft provided with the sleeve via closure means such as a bushing, a main wheel or the like.

The above-mentioned features and other features will be explained in detail below.

The accompanying drawings illustrate, by way of non-limiting example, some embodiments of the invention.
'Il is recognized.

This pedal made of plastic material for a bicycle or the like mainly comprises a main body 1 having in the axial direction a hollow shaft 1a fixed at both ends to a support frame 1b, and a support frame 1b.
The long sides of are simply reinforced by shaped lips forming A and IQ.

The support frame 1bl'i includes, according to each support surface and hand portion, a T-shaped outer plate 1d with a tip relative slit 1e formed by an outer band 1f. These slings (positioned alternately according to their respective support surfaces) 1e pass through the tightening bolts of toe clips (cale-pieds) fixed in a known manner through openings provided on the long sides of the support frame 1b. I can do it.

The hollow shaft 1a has a complete inner wall and a series of stepped contact surfaces (xg −+h −1i −t
It should be noted that the formation of j −tk −xt −xm). This pedal body 1 can be obtained by molding in one go without any additional machining.

Standard diameter gold I4 that bends and withstands the stress applied on the pedals.
The shaft 2 is fixed longitudinally via one or several grooves 2ai formed on the front support by a remolding method, and the outer side is I feel calm.

This sleeve 3 has a compatible diameter of 1α in order to reduce the contact pressure to an allowable value, and has an auxiliary hole tg-1h- of the hollow shaft 1a.
In order to reliably center the Ji-ij-1 upwards by -17-1m, the stepped contact surface 3a-3 becomes narrower little by little.
b -3c -3d -3e -3f -3g are formed from the outside.

In addition to the cylindrical support part, the metal shaft 2 also forms an overhang, and this overhang is followed by a threaded protrusion 2b that is screwed into the crank, and then tightened by fitting a key. Therefore, a flan with a support surface 2C is formed with a flat part 2d.

On the opposite side, a sleeve 3 protrudes from the tip of the metal shaft 2 and is attached to a flange I of the hollow shaft ia.
A cylindrical groove 3h with a contact surface is formed to enable fitting of n and fixation in the translational direction. In order to elastically fit the outer flange 4a, which cooperates frictionally with the outer surface ia of the hollow shaft, and the complementary inner part of the tip of the sealing cylinder 4 in the chamber lp, the conical groove 31 provides a relief for the sleeve 3. It is provided following the section 3h. This outer flange 4a further includes the hollow shaft I.
An outer edge 4b that secures sealing properties is formed by slightly overlapping with the cone-shaped outer end of a. The press-fit or welded bushing 5 reliably closes the axial opening of the sleeve 3.

In the specific example shown in FIG. 11, a sleeve 7 made of plastic material is fitted onto the metal shaft 6, but its outer end protrudes and is a contact surface for fitting the flange In of the hollow shaft 1a of the pedal body. 6a and a right-angled cylindrical groove 6b, which has a protective cover 83 on the outside or which provides a claw-type elastic fit for the strong slit bushing 8, is subsequently formed.

This protective cover slightly overlaps the conical tip of the hollow shaft ia to form a protruding outer edge that ensures sealing.

In the specific example shown in FIG. 12, the flange 1n of the hollow turret bta of the pedal body 1 (bow, in order to align it), the metal shaft 9 protrudes from the remolded sleeve 10, and is attached to the shaft end 9a. In order to maintain the sealing property, the outer edge 11b is pressed into the circular cIL-shaped tip of the hollow shaft 1a, and the front groove lla is provided.
Threads are cut for screw-fastening the bushing 11 having the shape.

In FIGS. 13 and 14, the bent shaft 2 protrudes from the remolding sleeve 13 and forms a mating portion 12a of the flange 1n of the hollow shaft 1a. Groove 121 following the current surface 12a]
is located opposite the other groove 1t of the opening of the hollow shaft 1, and is engaged by the half of the arm of the presser horn 14, which fits into the corresponding opening formed laterally in the hollow shaft 1. can get. This horn 14 is fixed in a fitting position by a tip 14a cut at right angles and pushed against the outer periphery of the hollow shaft of the pedal body 1. Further, the cap 5 is elastically fixed to the hollow shaft 1a and the tip of the sleeve 12, thereby ensuring sealing performance and at the same time providing reliable closure of the opening.

In the specific example shown in FIG. 15, the sleeve 17 protrudes from the tip of the metal shaft 8 and is used for fitting and fixing the threaded flange 1n of the hollow shaft 1a of the pedal body 1 in the translational direction. A cylindrical relief portion 17a with a face is formed on the outside. This abutting surface 17a further comprises a flat surface 17b for fitting into a corresponding hole of the bushing 18 and securing circumferential fixation, and a moving projection 18a which fits at the tip into a corresponding axial opening 17c of the sleeve. The bushing is securely fixed transversely to the corresponding contact surface of the sleeve 17 by ultrasonic welding.

It should be noted that in each case, the pedal is provided with a cover 16 of flexible material, which is fixed on the side of the crank to the outer periphery of the hollow shaft 1a by means of fasteners.

Although the features of the present invention may be understood from the above explanation, I would like to particularly emphasize the following points. i.e. - the pedal body is made of plastic material;

There is no machining of the single rotation part.

- Omit regular bearing parts.

- Quick assembly.

The present invention is limited to some examples of application of the present invention and the manufacturing method of each part, which are specifically mentioned as examples, and the scope of the present invention includes all hairstyle examples.

[Brief explanation of drawings]

FIG. 1 is a scaled front view of a pedal body according to the invention, vr
Figure 2 is a side view corresponding to Figure 1, Figure 3 is a side sectional view taken along dashed line 3--3 in Figure 1, Figure 4 is a front sectional view taken along line 4-4 in Figure 1, and Figure 5 is a side sectional view taken along dashed line 3--3 in Figure 1. 6 and 7 are vertical cross-sectional views of the connecting shaft with the remolded plastic sleeve connected.
Fig. 8 is a side view corresponding to Fig. 5 shown on an enlarged scale, and Fig. 9 is shown on an enlarged scale. Fifth
10 is a longitudinal sectional view of the entire pedal after assembly, shown on an enlarged scale, and FIG. 11 is a lateral fixing ring secured by a claw-type elastic fit. 12 is a partial vertical sectional view of a pedal with a lateral fixing ring fixed by a screw, and FIG. 13 is a partial longitudinal sectional view of a pedal with a lateral fixing plate fixed by a stopper. Partial longitudinal sectional view, Fig. 14 is Fig. 13
A cross-sectional view taken along the line 14-14 in the figure, and FIG. 15 is a partial vertical cross-sectional view of a pedal with a horizontal fixing bush fixed by ultrasonic welding. 1...Pedal body, 1a...・Inside axis, 1b...support frame, IC...arm, Id...T-shaped outer plate, 1
e...Slit, 1f...Outer f111 band, 2.
...Metal shaft, 3...Sleeve, 4...Sealing ring, 5...Button. Engraving of drawings (Contents (.: No changes)

Claims (1)

Claims: (1) In a pedal for a bicycle or the like, centered on a corresponding contour of a sleeve of plastics material remolded over a metal shaft of standard diameter so as to rotate freely on this contour; A pedal body of plastics material with a hollow shaft provided with holes for shaping and obtaining a friction surface of the abutment surface of plastics material compatible with the pressure exerted on the pedal, and a sealing of the pedal body to said shaft. A pedal comprising a means for stopping and lateral locking. (2) The nine surfaces of the hollow shaft of the pedal body and the sleeve of the metal shaft are complementary and have a step-like continuous cylindrical shape that is directly formed during molding. The pedal described in item 1. (3) A patent claim in which the hollow shaft of the pedal body cooperates with two reliefs formed in its hole to enable lateral support on the sleeve of the metal shaft and on the fastening means. The pedal according to item 1 of the FHJi category. (4) The shaped arm includes a pedal body forming a hollow shaft connected at its tip to a support stem having long sides reinforced in the axial and lateral directions, and the toe clip is tightened through a belt. Claim 1, in which distal slits or longitudinal openings are arranged along each side of the support stem.
(5) A sleeve of plastic material projects outwardly from the metal shaft for engaging and restraining the flange of the hollow shaft, and a sealing ring is inserted into the conical groove of said sleeve at its tip. Fitted by elasticity due to the shape, the tip of the hollow shaft 'f
2. A pedal according to claim 1, wherein the opposed flanges form a distal end cover with a rim or peripheral bead for carrying the sleeve, and a bushing is fitted and secured within the axial opening of the sleeve. (6) As a modified example, the means for fixing and sealing the pedal body is composed of a bushing with a slit, and the front part of the shoulder pad of this bushing is provided at the tip of the metal shaft protruding from the reshaped sleeve. 81' The pedal according to claim 1, wherein the tip of the hollow shaft is covered in such a manner that the bushing is elastically fitted into the bushing and a retaining cover is fitted into the bushing. (force) As a modification, the fixing and sealing means of the pedal body may
The bush protrudes from the wide metal shaft and is screwed face-to-face in the axial direction by the F1 port on the tip with the C-thread.The bush is shaped so that it presses against the tip of the hollow shaft. 't'f forming a front groove with one green
1il - A pedal according to claim 1. (8) As a modified example, the means for fixing and sealing the pedal body is
- on the one hand, it is fitted by the front circular groove with a circular positioning surface into the outer abutment surface of the protrusion of the sleeve, and on the other hand by the axial part forming the protrusion into the corresponding opening formed in the tip of the sleeve 1; It will become a bush,
2. The pedal according to claim 1, wherein the bushing is fixed in a direction transverse to the contact surface by ultrasonic welding.