JPS5824037Y2 - multi rib belt - Google Patents

Description

[Detailed description of the invention] This invention relates to the structure of a low edge type multi-rib belt that connects a plurality of V-belts.In particular, a group of cogs is provided in the rib compression part, and one to several layers of rubberized canvas are laminated. By embedding the canvas layer and exposing the canvas layer along the cog group on the side of the ribs, it is possible to create conventional low edge type poly V belts, low edge type multi-rib belts, as well as low edge belts with the canvas layer buried and exposed in the compressed part. The purpose of this belt is to significantly increase the noise prevention effect compared to edge-type V-belts and to improve the bending ratio.

Conventionally, there is a so-called low edge type poly V belt that has a plurality of triangular protruding ribs on the lower surface of the tensile member part as a multi-ribbed belt, but since there is no fiber layer on the side of the rib, it is difficult to use when the belt is driven. There is a problem in that it is difficult to pull the belt out of the pulley and generates noise, and furthermore, since the tips of the protruding ribs are sharp, horizontal cracks occur at the tips of the ribs, resulting in rib breakage.

Therefore, in order to improve the drawbacks of the IJ V belt, a low edge type multi-rib belt has been developed in which the tips of the sharp triangular ribs are cut off to provide a plurality of so-called trapezoidal ribs on the lower surface of the tensile member. This was proposed, but since the ribs are trapezoidal, even though the cracking phenomenon like the above-mentioned PO IJ V belt does not occur, it is still insufficient in terms of noise generation, and furthermore, the bottom surface of the ribs is flat, so the bending ratio is low. There was a problem about.

On the other hand, as a noise prevention measure, a low edge type V-belt has been proposed in which multiple layers of rubberized canvas are buried in the compression part and the canvas layer is exposed on the side, but this Although it is relatively noiseless and has some effect in terms of noise prevention, when multiple V-belts are installed, even if the individual V-belts are the same size, the cross-sectional area and length of the belt are slightly different, so the multiple V-belts are all the same. There is a problem that the V-belt does not rotate at the same speed, resulting in a speed deviation, which generates a clenching sound (noise).Furthermore, when the above-mentioned V-belt is fitted in two and driven, the top surface of the belt curves downward. Peeling from the tensile material part,
This has caused problems such as cracking and early failure.

This invention was devised as a result of various studies to solve the above-mentioned problems, and its feature is that the trapezoidal ribs of the multi-rib belt have a predetermined pitch in the compressed part. In addition to providing a group of cogs, the canvas layer is laminated and buried with l~multiple layers of canvas made of twill weave fabric in which the warp is a crimped yarn and the weft is a non-crimped regular yarn. The rib is exposed along the side cog group to significantly reduce noise during belt drive and to improve the bending ratio.

Hereinafter, embodiments of the multi-rib belt according to the present invention will be explained in more detail with reference to the accompanying drawings. 6 □ Fig. 1 is a partially cross-sectional perspective view of the multi-rib belt according to the present invention, and in the figure, 2, 2,
3 is NR (natural rubber), 5BR (styrene, butadiene rubber), 'C'R' (chloroprene rubber), or BR (
The upper and lower adhesive rubber layers are made of a single material such as butadiene rubber (butadiene rubber) or an appropriate blend of these materials. Tensile ropes 1 with low elongation and high strength are buried in parallel to form the tensile body part, and the upper surface of the tensile body part including the tensile body 1 is lined with cotton yarn or cotton threads of various types. Rubberized plain weave canvas made of yarn blended with synthetic fibers, rubberized wide angle canvas made of cotton yarn or blended yarn of cotton yarn and various synthetic fibers, woven at a wide angle of intersection of □95 to 150°. One or more layers of rubberized canvas 4 made of canvas or the like are laminated and adhered to form a tensile portion with respect to the tensile body portion.

On the other hand, the compressed part 6 located at the lower part of the tensile body part is the most characteristic part of the multi-rib belt of the present invention. A rubberized twill weave canvas in which the group γ is oriented and buried in the transverse direction, and a cog group 8 with a constant pitch P is formed at the bottom thereof, and the warp is a woolly-processed crimped nylon yarn and the weft is a cotton or nylon yarn. 5 are oriented and buried in l~plural layers along the cog group 8 and the recess Q of the cog, and both sides of the husband are exposed at the side surface of the compressed part 6 of each rib.

In this case, the short fiber group 7 buried in the upper part is also exposed on the side surface.

As mentioned above, by exposing the buried canvas along the side surfaces of the ribs and increasing the exposed area of the fiber layer to the side surfaces of the belt, the manner of contact with the pulleys during driving of the multi-ribbed belt is improved, reducing noise. In addition, by providing the cog group 8 on the lower surface of the rib, the bending ratio can be improved and it can be used even with small pulley diameters, making these belts extremely suitable for automobiles and general industrial use.

The above explanation is for the case where the groove G of each rib is located on the lower surface of the tensile member rope, but the multi-rib belt of the present invention is further modified as shown in FIG. Top! In some cases, this may be reached, and this is also covered by the present invention.

That is, in Fig. 2, 1' is a tensile rope z, 3' is an upper and lower adhesive rubber layer, l is a canvas connecting each rib, and 4''
1 and 2 respectively indicate the intermediate rubber layer of the tension section, which in this case serves as a connection between the canvas 4' and the intermediate rubber 4''.

(In the case of FIG. 1, the tensile rope 1 mainly performs the function of connecting each rib.

) Also, the canvas tent is buried in the lower part of the compressed rubber part 6' of each rib and exposed along the cog group (not shown) on the side of the rib, and the short fiber group 1' is arranged in the lateral direction on the upper part. However, as mentioned above, the groove G' of each rib is located on the upper surface of the tensile member 1', unlike the case of Φ in Fig. 1, and therefore the tensile member 1' is buried in each rib. The structure is as follows.

By forming each groove σ on the upper surface of the tensile member 1' and embedding the tensile member rope 1' in each rib, the pitch line of the tensile member rope 1' is lowered and noise can be prevented. In addition to this effect, each rib also exhibits a transmission function as a belt due to the wedge effect, which has the effect of further increasing transmission efficiency.

As described above, the multi-rib belt of the present invention is provided with a group of cogs at a constant pitch in each rib compression part, and has one to multiple layers of twill fabric canvas using crimped warp yarns with rubber layered and embedded, and the canvas layer is placed on the side surface of one knob. Since it consists of an exposed structure along a group of cogs, it has a better form stability ratio and is easier to pull out than other conventional low edge type belts that do not have canvas buried or cogs. In addition to significantly reducing noise during belt drive, the twill weave canvas using crimped longitudinal ropes reduces the degree of contact between the warp and weft yarns compared to normal plain weave, reducing the contact between the warp and weft yarns when the belt is bent. In addition, the crimpable warp yarns improve elasticity in the warp direction, increasing bending ratio and flexibility to accommodate bending and stretching of the belt, and the presence of the canvas layer prevents cracks in the rib portion. It can have a great effect of preventing this and increasing durability.

In addition, even if there are some errors in the dimensions of each rib, especially with the belt of this invention, the upper part is the tensile part and the tension part, and the tension part connects and rotates at the same speed as the engaged pulley, so the canvas can be used as the compression part. It also has the feature that it does not generate clenching noise due to discrepancies in rotational speeds that occur when multiple V-belts of the laminated, buried and exposed low-edge type are individually hung.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional perspective view of a multi-rib belt according to the present invention;
FIG. 2 is a cross-sectional view of a modified embodiment of the multi-rib belt of the present invention. 1.1'...Tensile lobe, 2.2', 3,3
j...Adhesive rubber layer, 4,4'...Canvas with rubber, 5,5<...Canvas, 6,6'...
...compression part, 7. T'... Short fiber group, 8,8
'...Cog group, G, G'...Groove of rib, Q...Concave part of cog.

Claims (1)

[Claims for Utility Model Registration] l In a low edge type multi-ribbed belt consisting of a plurality of V-belts connected together and comprising a compression part, a tensile part, and a tension part, the lower surface of the compression part of each V-belt A group of cogs with the required pitch is provided at the bottom of the compressed part, and one to multiple layers of rubberized canvas made of twill weave fabric in which the warp is a crimped yarn and the weft is a non-crimped normal yarn are laminated and buried under the compressed part. A multi-rib belt characterized in that the canvas layer is exposed along a group of rib side cogs of each V-belt. 2. The multi-rib belt according to claim 1, wherein the rib grooves are formed on the lower surface of the tensile member portion. 3. The multi-rib belt according to claim 1, wherein the grooves of the ribs reach the upper surface of the tensile member portion.