JPS63252814A - Conveyor belt - Google Patents

Abstract

PURPOSE:To improve the extent of endless working properties by installing a separating rubber layer between coat rubber covering a core body of an aromatic polyamide fiber or the like and both-side cover rubber. CONSTITUTION:A core body 13 of aromatic polyamide or overall aromatic polyester fiber is covered with coat rubber 12, interposing separating rubber layers 16a and 16b therein, and upper face cover rubber 14 and lower face cover rubber 15 both are formed. In this case, these separating rubber layers 16a and 16b are made up of adhesion between the coat rubber 12 and upper-and- lower-surface cover rubber 14 and 15, and at time of separation, such one that is subjected to cohesive failure is desirable. In this constitution, after separation, these separating rubber layers 16a and 16b left behind on the coat rubber 12 are buffed with a sander or the like, removing them to the full. Thus, endless working properties are improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a conveyor belt, and more specifically, when endlessly processing a conveyor heald, it facilitates the peeling operation of the end portion and improves the endless processing workability. This relates to conveyor belts.

[Prior art]

Conventionally, an aromatic polyamide fiber or a wholly aromatic polyester fiber coated with a coated rubber 1a as shown in FIG. When a belt-like belt A made of adhesive is constructed into an endless shape of a predetermined length, the rubber cover at each end of the belt is peeled off for a predetermined length, and the end parts are butted together or The cover rubber is placed again on the peeled off part in the combined state, and the cover rubber is vulcanized in this state to form an integral structure.

By the way, conventional aromatic polyamide fiber (product name: Kevlar yarn) or fully aromatic polyester fiber (Kuraray A1
Belts with 1-ply or 2-ply structure, made of Pectran (product name: Pectran), have an ultra tensile strength of 1000100
In the case of O/cm belts, coated rubber with high adhesion strength (50 kg-f/25 or more) and high tearing strength (70 kg-f/am or more) is used to achieve high bonding strength and bending fatigue resistance. are using.

However, since the coated rubber with high adhesive strength and high tear strength is used as described above, the following problems arise.

In peeling off the cover rubber of the ta+ endless process, it is essential to use a winch or the like, and since the cover rubber is cut, the workability is poor and it takes a lot of time.

(b) When the cover rubber is peeled off, the core body 1 may be deformed or, in the case of canvas, the weft threads may be misaligned, exposing the portions that are not bonded to the rubber.

(The core is easily damaged by the scalpel when peeling off the Cl cover rubber, the sander when puffing the remaining rubber, etc.)

(d) Physical properties (tensile strength) to avoid cover rubber breakage.

Since a cover rubber with high tearing strength is used, the cost is increased.

[Purpose of the invention]

This invention was devised in view of the above-mentioned problems in the prior art, and its purpose is to facilitate the peeling of the cover rubber at the end when endlessly processing a conveyor heald. In addition to making joining work easier,
The present invention provides a conveyor heald that can improve bonding workability.

[Structure of the invention]

In order to achieve the above object, the present invention provides a peeling rubber layer between the coat rubber that covers the core of aromatic polyamide fiber or wholly aromatic polyester fiber, and the upper cover rubber and the lower cover rubber. The purpose of this invention is to facilitate the work of peeling off the cover rubber and to significantly improve workability.

In addition, the peeling rubber layer may be provided with canvas, and by making the color tone different from that of the yaw rubber, the peeling work and surface finishing can be performed more accurately, further improving workability. It is something that can be done.

[Embodiments of the invention]

The present invention will be described in detail below based on the accompanying drawings.

FIG. 2 shows a sectional view of a belt main body 11 in which the present invention is implemented. Top cover rubber 1
4 and a bottom cover rubber 15 are integrally bonded together.

Peeling rubber layers 16a and 16b are provided between the coat rubber 12 that covers the core 13 of the aromatic polyamide fiber or wholly aromatic polyester fiber, and the two-sided cover rubber 14 and the bottom cover rubber 15. There is.

A canvas may be included in the peeling rubber layers 16a and 16b.

After peeling off the cover rubber, the peeling rubber layers 16a, 16b remaining on the coat rubber 12 are completely removed by a huffing process using a sander or the like, and the peeling rubber layers 16a, 16b are completely removed to give a smooth finish.
16b is provided.

Further, the rubber of the peeling rubber layers 16a and 16b is the coat rubber 12 and the top cover comb 14. It is preferable that it sufficiently adheres to the lower cover rubber 15 and that upon peeling, the rubber of the peeling rubber layers 16a, 16b will undergo cohesive failure, and its tear force is preferably 50 kg-f/cm or less.

Furthermore, the thickness of the peeling rubber layers 16a, ], 6b is as follows:
Desirably 0.1~1.0■, more preferably 0.3~
0.6 nc is good.

In addition, when a canvas is provided in the peeling rubber layers 16a and 16b, the smaller the amount of threads in the cloth both vertically and horizontally, the easier it is to peel off, and the structure is preferably a leno weave.

〔Effect of the invention〕

In this invention, a peeling rubber layer is provided between the coat rubber that covers the core of aromatic polyamide fiber or wholly aromatic polyester fiber, and the top cover rubber and bottom cover rubber as described above. It has excellent effects.

(a) Cutting of the cover rubber can be avoided in the endless process cover stripping work at the end of the belt;
The workability of joining belts is significantly improved, the work time can be significantly shortened (1/2 to 1/3) compared to the conventional method, and the work can be performed without using a winch or the like.

(When removing the BL cover rubber, deformation of the core and exposure of the portion of the core that does not adhere to the rubber can be avoided, and the interface between the core and the coated rubber can be preserved without being destroyed.

(It is possible to avoid damaging the core with a Cl scalpel or sander.

(For the DL cover rubber, it is sufficient to use a material suitable for its function, which is economical as unnecessary cost increases can be avoided.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional conveyor heald, and FIG. 2 is a cross-sectional view of an embodiment of the present invention. 11... Heald body, 12... Coat rubber, 13.
Core body of aromatic polyamide fiber or wholly aromatic polyester fiber, 14... Top cover rubber, 15... Bottom cover rubber, 16a, 16b... Rubber layer for peeling.

Claims (1)

[Claims] A conveyor belt constructed by integrally adhering an upper cover rubber and a lower cover rubber to the upper and lower surfaces of a core made of aromatic polyamide fiber or wholly aromatic polyester fiber, wherein the aromatic polyamide fiber or wholly aromatic polyester fiber is A conveyor belt characterized in that a peeling rubber layer is provided between a coat rubber that covers a core of aromatic polyester fibers, and an upper surface cover rubber and a lower surface cover rubber.