JPS5861002A - Elastic solid tire - 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 solid tire having fibers embedded therein.

(3) It is known that the manufacturing costs of solid tires are reduced by embedding fibers in the rubber mixture of solid tire sumps, and the sulfides thus produced are tightened. Depending on the field of use, the fibers are embedded in various layers of the solid tire. For solid tires, such as those consisting of tread rubber, rubber cushions, and bead rings made of sticky hard rubber, an extremely dry and hard mixture may be used, especially for bead rings with a ring-shaped steel wire inside. It is important to ensure that a tire fitted onto the cylindrical surface of the rim, for example with a pressure seat, remains securely seated even under heavy loads. For various solid tires, materials for the embedded fibers include mineral fibers such as asbestos, synthetic fibers such as rayon, nylon: PE, etc.
animal fibers such as wool, and plant fibers such as wood,
The policy is raised. Metals, glasses and carbon may also be suitable.

In known solid tires with fiber pieces embedded in the bead link rubber, during operation, due to the changing load (4), the fiber pieces begin to move in the rubber mixture and the rubber surrounding them Due to the internal movements caused by the tire, the rubber often tears after a short period of time, making the seating of the tire on the rim dangerous.

The object of the invention is therefore to provide a solid tire in which safe rim seating and possible driving are guaranteed.

This task is solved according to the invention by adding to the mixture an adhesive known per se for the fibers used, the fibers being chemically bonded to the rubber surrounding them in at least the layer of the solid tire. It is solved by being combined with

The adhesive is then advantageously added directly to the rubber mixture. In a finished tire due to chemical bonding between the fiber surface and the adjacent rubber, the fibers are no longer present as mobile foreign bodies in the rubber, so that the fibers also carry out a "saw action" during their internal movement. The fibers are strongly bonded to the rubber and become a single unit.

(5) Advantageously, according to the invention, the viscous rubber mixture is obtained with previously unobtainable qualities as a bead link, so that the solid tires produced in this way have an essentially long service life.

In this case, according to the configuration of the present invention, the fibers are embedded in at least the ring rubber layer in an amount of at least 5% of the weight of the bead link, and the layer thickness of the bead ring rubber is 10 to 10% of the cross-sectional height of the tire. If it is 90%, the normal bead steel wire in the bead rubber can be completely omitted.

This configuration provides good tightening such that the difficult and costly throat steel wire can be completely omitted if the fibers are embedded in the bead ring by 5% by weight and a minimum layer thickness is maintained for the bead link. It will be done. In order to obtain a possible flange seat, the inner diameter of the tire in the assembled state is increased by 0.5 to 10% compared to the unassembled state.

The tire according to the invention has the advantage of being simple and inexpensive to manufacture, in addition to significant weight savings due to the elimination of beaded steel wires.

(6) Another advantage is that increased stiffness does not result in an unexpected reduction in rolling resistance.

Furthermore, the present invention is highly suited for increasing the durability of certain vehicles of solid tires by embedding fibers in the rubber cushion.

Even solid tires with only one rubber layer or with two different rubber layers benefit from the technical advantages of the present invention.

Other configurations of the invention are described in the Enabling Mode section.

Next, two embodiments of the present invention will be described in detail with reference to the drawings.

A solid tire made of rubber or a material similar to rubber consists essentially of bead layers: a tread rubber 1 with low wear, a rubber cushion 2, and a bead made of sticky hard rubber in which a bead steel wire 4 is embedded. It consists of ring 3.

Bee 4'! Fibers 5 are also embedded in the rubber of Jing 3 and the rubber of rubber cushion 2, and the fibers are chemically bonded to the adjacent rubber by, for example, a known adhesive system from the known resorcin/hefusa system. has been done. The chemical bonds are schematically indicated in the figure by dots in the immediate vicinity of the fibers 5.

The solid tire according to FIG. 3 differs from the one according to FIG. The fibers differ by being exclusively in the bead links 3. However, fibers can also be present in both other layers if required. Depending on the particular intended use of the tire, other thicknesses of the bead link 3 between 10 and 90% of the cross-sectional height of the tire are also possible.

The weight percentage of the fibrous material 5 is at least 5% of the total weight of the bead ring 6. It has been demonstrated that a weight f% of 15% to 20% is suitable.

In a solid tire having the above-mentioned characteristics, the incorporation of a bead steel wire, which is common in the past, is not necessary since the safety against engagement and disengagement from the rim is not compromised.

The tire is assembled (8) onto a rim (not shown) by means of suppressed dust, and at this time, the inner diameter of the tire is expanded by about 5% compared to the state before assembly in order to generate preload for the safety seat. Other fastening elements for safe seating of the rim are unnecessary. As fibers 5 preferably synthetic resin materials are used, for example mixtures of rayon and nylon. fiber 5
It is particularly preferred to obtain the tire cord by cutting it from the tire cord fabric product or by removing it from the cord fabric of old tires.

The fibers 5 are 1 to 5 long in length and the diameter versus length is such that the milled fibers 5 are added to the rubber mixture so that the randomly embedded fiber pieces 5 are then calendered. is preferably oriented in the direction of movement of the roll. This means that the fiber strips 5 are preferably oriented in the circumferential direction during the finishing of the solid tire, so that a particularly high tension in the bead link 3 is obtained.

It should be noted that if necessary the fiber strip 5 can also consist of a metallic material (9), for example brass-plated steel wire from an old pneumatic tire is used. In such cases, of course, the known adhesives of brass or steel pots are used.

Fibers 5 made of other materials can also be provided, in which case a rubber mixture adhesive is added which effects a strong chemical bond between the selected fiber material and the adjacent rubber. is important.

The above-mentioned embedding of the fiber material also into the rubber cushion 2 has been carried out particularly well in solid tires with a large stacking height of forklift truck sumps. In such a case,
m of the vehicle by embedding the fiber piece 5 in the rubber cushion 2.
Durability is significantly increased.

[Brief explanation of drawings]

Figure 1 is a radial partial sectional view of a solid tire, Figure 2 is l
FIG. 3 shows a partial sectional view of the circumferential surface along the line l-Tl, and FIG. 3 shows a partial radial sectional view of another solid tire. (10) Code 5 in the figure...Fiber (11)

Claims (1)

[Claims] (1) In a solid tire made of rubber or a material similar to rubber, which is formed of one layer or multiple layers and has fibers embedded in at least one layer, the fibers (5) surround the fibers. A solid tire characterized by being chemically bonded to rubber by adhesive. (2) A wear-resistant tread rubber (1), an elastic rubber cushion (2), and a bead steel wire or bead steel plate made of sticky hard rubber and extending in the circumferential direction (
a bead ring (3) made of rubber with a bead ring (3) comprising a rubber cushion (3) with fibers (5) chemically bonded by an adhesive embedded in the bead ring (3) and/or an elastic rubber cushion (2); A solid tire according to claim 1. (6) The solid tire according to claim 1 or 2, wherein a resorcinol/hexamethylenetetramine adhesive is used as the adhesive. (4) A solid tire according to claim 1, wherein the fibers (5) have a length of 1 to 5 lengths. (5) the diameter to length ratio of the fiber (5) is at least 20;
A solid tire according to claim 1. 6. A solid tire according to claim 1, wherein the fibers (5) consist of a synthetic material, in particular rayon and/or nylon. (7) Metal fibers (5) are used. A solid tire according to claim 1. (8) The solid tire according to claim 1, wherein the fibers (5) are arranged in the circumferential direction. (9) at least in the bead ring rubber layer (6) at least 5% of the weight of the bead ring (3) by weight of fibers (
5) is embedded, the layer thickness of the bead ring (3) is 10-90% of the cross-sectional height of the tire, and the bonded and embedded fiber (5) is like a bead steel wire. A solid tire according to claim 1, wherein the solid tire is replaced by a conventional ring-shaped metal insert layer. (2) (10) Claim 9, wherein the fiber (5) in the bead ring (3) accounts for 15 to 20% of the weight of 1 sho of the bead ring.
Solid tires as described in section. (11) The solid tire according to claim 9, wherein the layer thickness of the bead ring rubber (3) is approximately 50% of the tire cross-sectional height. (12) The solid tire according to claim 9, wherein the tire has an inner diameter enlarged by 0.5 to 10% in order to obtain preload in the assembled state. (15) The solid tire according to claim 12, wherein the inner diameter increases by approximately 5% compared to the state before assembly. (14) Among claims 1 to 13, in which the rubber mixture of the tire in which the fibers are embedded is added with an adhesive known per se to the fibers used. A solid tire listed in any one of the following.