JPS58109746A - Flat belt - Google Patents

Abstract

PURPOSE:To prevent wear with a higher transmission efficiency by rpoviding either of the surface and the back of a flat belt with at least two of characteristics of a high friction coefficient, a wear resistance and oil absorptivity. CONSTITUTION:The surface or the back of a flat belt 1 is formed by combining at least two of a material 12 with characteristic of a high friction coefficient, a material 13 with characteristic of a wear resistance and a material 14 with characteristic of oil absorptivity.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a half-belt, sometimes a flat belt made of a combination of at least two or more materials having different properties on at least one of one surface and the back surface.

The respective properties of wear resistance and friction coefficient in belt materials such as rubber are generally in a contradictory relationship. If the abrasion resistance is improved, the lII friction coefficient will be lowered, and if the friction coefficient is increased, the abrasion resistance will be deteriorated.

The flat belt is as shown in Figure 1 (1) and tb).

A drive flat pulley 20 is provided on the belt rear surface (20) and the frictional force generated between the belt rear surface (20) and the belt rear surface (20) is used to transmit power to, for example, a spindle 8o of a twisting machine. It is driven by a spindle (aO) of usually 100 to 400 screws per twisting yarn + fit table or one flat bell (10). These spindles 80 are pressed against the belt 10 by a guide pulley 40. The friction transmission of the belt 10 is transmitted to the spindle 8o.
In order to efficiently transmit the force to the spindle 80 and rotate the spindle 80 efficiently, the belt surface 100 usually needs to have a high coefficient of friction. However, 1. For example, when a thread of twisted yarn breaks, in order to connect the thread, the thread is connected while the belt is running, and only the spindle is stopped with a brake. 0 At this time, the belt surface 100 is connected to the spindle. They will rub each other for about 20 seconds. Since the belt surface 1tlJ has a high coefficient of friction, abrasion particles such as those of worn rubber fly away.

In order to prevent the scattering of abrasion particles (in other words, if the twisted threads only become dirty, the life of the schelt will be shortened), a material with excellent seam resistance and therefore a low coefficient of friction is used for the belt surface 100. Then, 1 of spindle 80
! ! As a result, the number of twists in the twisted yarn becomes uneven, which causes a decrease in the quality of the yarn.

Further, in order for the power of the drive flat pulley 20 to be efficiently transmitted to the belt 10, it is necessary that the friction coefficient of the back surface of the belt be high. but.

If there is a burr in the belt transmission and the torque on the shaft to be applied is f: # torque, or between the flat pulley 20 and the back side of the belt ■0, the belt 10 will wear out, and the same applies to 6ζ.

Rubber and other wear particles are scattered. If a material with high abrasion resistance and a low coefficient of friction is used for the belt back surface 110 in order to prevent belt wear, the rotation of the pulley 20 will not be properly transmitted to the belt to.

An object of the present invention is to provide a flat belt that has a low friction coefficient on the belt surface 8 and/or the back surface that contacts a spindle, pulley, etc., and has excellent abrasion resistance. The present invention will be explained in detail below based on the Gallo C with reference to one drawing.

, i%2 As shown in Figure 1, the surface 1 of the flat belt l of the present invention
1 is a material I2 having a high temporality 8- at the time of *friction coefficient;
4 is made in combination with a material 13 having excellent wear resistance. The meat materials 12.18 are arranged in alternating rows parallel to each other and swamped in one direction along the pitching direction of the bell. The exposed surfaces of the four materials 18-8 forming the belt surface 11 are processed so as to be flush. (2
) The product ratio depends on the hardness of the material, the sign of the coefficient of friction, the required torque of the spindle or pulley, and the brake + r! Is it determined depending on other usage conditions such as II# status?

Usually, it is selected in the range of approximately αl to α9. This area ratio also depends on which of the friction coefficient and wear resistance is more important depending on the use of the belt transmission.

Examples of the above-mentioned material 12 having a coefficient of friction include nitrile rubber, gloloprene rubber, urethane rubber, etc.
By mixing an appropriate amount of a softening agent such as dioctyl phthalate, the hardness can be increased to about 4F and about 60°, and the friction coefficient can be adjusted to about α6 to αT! llI The above-mentioned material 1B with excellent wear resistance is made by mixing an appropriate amount of carbon into, for example, nitrile rubber, chloroprene rubber, urethane rubber, etc., and having a hardness of about SO0 and a friction coefficient of about α.
The one adjusted to 4-05 is used. Hardness varies depending on the amount of carbon mixed, the difference in SL, and the size of particles. For example, if carbon is used (the size of one particle), the hardness will decrease, and if the size of one particle is small, the hardness will increase. The hardness of normal rubber f4 is about 70°, and the hardness of normal rubber is about 70°. The coefficients are approximately α4 to αb. Hard 111111 constant 1
iJISIL%(DK-1!IQIE-based l111! is defined.

In place of the above-mentioned material 2, which is made of rubber mixed with a IIl agent and has a high JIil friction coefficient, a magnetic rubber obtained by mixing amorphous iron powder etc. with a soft rubber is used. Because the magnetic force increases the pressure with the iron boot IJ, as a result, O magnetic rubber No. 1. Therefore.

When combined with the queen material T8 which has excellent wear resistance properties, it is possible to provide a flat belt with a higher coefficient of friction and excellent wear resistance than 6ζ.

However, rubber generally absorbs oil, and if oil remains on the first and sixth sides of the C-piece, the rubber coefficient will drop significantly. Therefore, as shown in FIG. 8, in addition to the material 12 with the sC, m written coefficient and the material 18 with the above-mentioned wear-resistant properties, the use of the material 14 with the oil absorption custom made is a bell. )
When material 13MDIII friction coefficient characteristic force decreases by 1 due to oil polished on the Boo 13 shaft during Jim-, this material 1
It is preferable to maintain a coefficient of friction of 4 instead of 2.

As the material 4 having excellent oil absorption properties, for example, natural tanned leather, or a rubber or synthetic resin surface material made of open cells (for example, synthetic leather) can be used.

j! In addition to the combination shown in FIG. 2, the combination of shelf material 1, for example, the above-mentioned materials 2 and 18, is similar to that shown in FIG.
They may be arranged parallel to each other in the longitudinal direction of l and alternately arranged in the width direction of 6ζ. Also.

As shown in FIG. 2, they may be arranged parallel to the ring direction of the belt l and alternately along the longitudinal direction.

In addition, as shown in Diagram JJ6 and Diagram 7, they can be arranged without having a specific regular directionality.

The materials in FIG. 46 are arranged in a continuous manner, and the materials in FIG. 7 are arranged in a discontinuous manner. Combinations of three or more types of materials can be made in exactly the same way.

As described above, since the fkifIg or backing material of the flat belt of the present invention has a high coefficient of friction and excellent wear resistance, the frictional power of the belt is efficiently transmitted to the spindle and pulley, and at the same time, the belt An excellent effect can be achieved in that wear can be prevented.

[Brief explanation of drawings]

Figure 41 (1) is a front view of the main parts of a conventional yarn twisting machine using a flat belt, Figure 41 (b) is a plan view thereof, and Figure 2 is a partial perspective view showing an embodiment of the flat belt of the present invention. , FIG. 8 is a partial perspective view showing another embodiment, and FIGS. 4 to 71 are partial perspective views showing other embodiments.
- Belt surface, 12... Material having high friction coefficient properties, 18... Material having anti-wear properties, 14... Material having oil absorption properties, lll... Belt back surface. Agent Patent Attorney Hide Yamamoto Figure 71 (b) 0-24'/ Figure 7r4 Figure 75 1 Figure 6

Claims (1)

[Claims] A flat belt made of a combination of at least two types of materials having different characteristics on at least one surface of the LA (2) and the back surface. 2. The flat belt 〇 &s'M according to claim 1, wherein the characteristics are at least two of high friction coefficient characteristics, wear resistance characteristics, and oil absorption properties. 2. The flat belt according to claim 2, wherein the material having the above-mentioned properties is magnetic rubber.