JPS59223612A - Conveyor belt - Google Patents

Abstract

PURPOSE:To facilitate joining together of the opposite ends of a belt, by a method wherein, in a belt in which cover rubber layers are adhered together and secured at the upper and the lower with a steel cord, extending in the longitudinal direction of the belt, laid therebetween, the cover rubber layers, estimated to be joined together, of the opposite ends of the belt are replaced with an unvulcanized rubber material. CONSTITUTION:A cover belt is produced such that an upper and lower cover rubber layers 1 are laminated with a sted cord adhering rubber 5 laid therebetween as a plurality of steel cords 6 are supplied parallel to the direction of width of a belt in a condition to exert a specified tension thereupon. When the terminals of the conveyor belt are joined together, peel-off estimating lines 2 and 2' are marked on the both ends of the cover rubber 1 by means of a precise measuring device, and the cover rubber 1, being a joint estimating part 3, is removed along the estimating lines 2 and 2'. Thereafter, peeling-off rubber materials 4 and 4', made of an unvulcanized rubber material, being different in quality from the cover rubber 1, are placed in the removal part, and nips the steel cord 6 through the medium of the adhering rubber 5 to integrally laminate them.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to conveyor belts 1 to 1, and particularly relates to an end joint structure of a steel cord conveyor belt.

Conventionally, the end joining of steel cord conveyor belts has been carried out under all kinds of adverse conditions, including the environmental conditions of the construction site, location conditions, working conditions, and restrictions on competition A7 stop time.
It is desired to shorten the working time required for this terminal joining.

There is an invention disclosed in Japanese Patent Application No. 55-61827 (Japanese Unexamined Patent Publication No. 55-152944) that achieves shortening of the working time required for joining the ends of the conveyor belt. The invention provides an end section of a steel cord conveyor belt with a structure convenient for succession, replacement or repair, and a partition layer is provided between the end surface of the end section and the steel cord. The belt is installed at a certain distance from the end of the belt to protect it from the intrusion of foreign matter.It is easy to peel off the cover rubber, and it is also easy to disassemble individual cords, making it easy to use at the construction site. This greatly reduces the work time required to join the ends of the belt.

However, although the above-mentioned invention reduces the working time at the construction site, it has the disadvantage that the belt manufacturing process in the factory must be stopped for a long time to process the belt, which is a heavy burden on the manufacturing side.

The present invention has been developed in view of the above-mentioned points, and it saves the work time required to join the ends of the belt at the construction site.
Our aim is to provide a steel cord belt with an end joining structure that can be processed simply and quickly without having to stop the manufacturing process in the factory for a long time.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Conveyor bells 1 to 1 of the present invention will be explained below with reference to drawings showing the manufacturing procedure thereof.

First, we will explain the manufacturing line for steel cord bells (3), which is the premise of the present invention.

1. That is, the steel cord belt (7 bells 1 to 1) feeds a plurality of steel cords parallel to the width direction of bell 1 while applying a constant tension, and attaches steel cord adhesive rubber to the top and bottom of the belt. Upper and lower stands] By laminating J-bar rubber layers (q).

Here, in the process before laminating the cover rubber layer, as shown in Figure 1 (belt plan view), the position and dimensions of the joint part are drawn on both ends of the cover rubber using accurate measurements in advance. (The lines are drawn not only on the front side of the cover rubber but also on the back side.) Here, 1 is cover rubber, 2.
2' is a planned cutting line marked on the cover rubber surface.

Then, cut the planned cutting line 2.2' and cut the part 3 to be joined.
Remove the cover rubber that corresponds to.

Next, as shown in Fig. 2, a different type of rubber 4.4' prepared in advance with exactly the same thickness, width, etc. as the cut out part is inserted into the cut out part of the cover rubber corresponding to the part to be joined.
Steel cord 6 via steel cord adhesive rubber 5
sandwiched and laminated to integrate.

Here, the different types of rubber include, for example, unvulcanized FPDM (ethylene brobylene rubber), 11R (gotil rubber),
Rubber for adhesion of relatively steel cords such as silicone rubber (
Poor adhesion with compounds such as NR and SBR (
To 0,1.

10 kg/25 mm width), and includes different types of rubber and different colored rubber.

In addition, as another example, the part where the cover rubber corresponding to the part to be joined may be cut out, after being pasted, it may have the same thickness and width as the cut out cover rubber, and the cord diameter and cord pitch may be set in advance. Vulcanized fluid bar rubber 7.7' with cord grooves cut into upper and lower halves by a line connecting the cord center lines with a rubber mold that matches the use of the belt, such as the number of cords.
(See Fig. 3) and sandwich and laminate the steel cord 6 via the spool cord adhesive rubber 8 (see Fig. 14).

At this time, since this vulcanized cover rubber with grooves has already been vulcanized, its adhesion to the steel cord adhesive rubber is low, so be careful not to peel it off at least before the start of the on-site joining work. It is also possible to apply a puff treatment to the surrounding area of the bonding surface (back side) of the cover rubber, the medium heat section, and the area to be joined to the bell L/main body and apply adhesive.

Thus, the steel cord conveyor belt having the belt end structure constructed as described above is carried out at the construction site as follows (Pel 1 to end joining work).

In other words, bell 1 to cutting line 2 at both ends of the main body.
’ and then cut it with a cutting machine to remove the distal end. Then, peel off the vulcanized cover rubber 7.7' with cord grooves on both the front and back sides of the dissimilar rubber 1.4' of the part to be joined.

Next, dissimilar rubber 4.4' or vulcanized rubber with cord groove 7
．． 7' is peeled off and the exposed adhesive rubber is cut at each interval between the cords and buffed appropriately as necessary.

Thus, the other end of the belt is similarly treated,
The steel cords coated with adhesive rubber at both ends of the belt are inverted and placed adjacent to each other alternately, and the unvulcanized rubber 9.9 is placed as shown in FIG.
The belt is joined by attaching it from above and below with '' and then vulcanizing to integrate it.

Hereinafter, the effects of the present invention will be explained in detail.

(1) The area where the end of the belt is to be joined has low adhesive strength with the adhesive rubber instead of the belt cover rubber (o, 1 to 10
To! If/25mm) J'i? Ii rubber, for example E
Since it is attached with PDM, IIR1 silicone rubber, etc., it cannot be peeled off at the construction site without using a knife, etc.1:)
It can be performed in an extremely simple manner, and the time required for the joining operation is significantly shortened.

(2nd also sold at the construction Jfil site) 81S Until the joining work starts, as mentioned above, the adhesive strength between the different rubber of the part to be joined and the steel cord adhesive glue is 0.1 to 10K.
(1/25 nl Since it is so heavy, there is no fear that the foreign metal will fall off from the bell 1 body during work such as retracting the bell 1.

(Furthermore, the dissimilar rubber is also unvulcanized, and since it is vulcanized during manufacturing, the steel cord is completely sealed, and there is no risk of moisture or dust entering through the joint with the belt body.) , has no adverse effect on the quality of the bell l~.

(4) On the other hand, in the case of the example in which a vulcanized cover rubber 1X with code IF4I1 is used as the single layer of the cover, the vulcanized cover rubber holds the steel cord between the upper and lower surfaces via the steel cord adhesive balls 11. 〕-
It is very easy to cut the rubber between the belts, and the time required for belt joining work during construction is further reduced.

(5) In the other embodiments mentioned above, the unvulcanized Steel Row 14 adhesive rubber is finally vulcanized, and the cover is vulcanized with cord grooves, and the back side of the cover rubber is in the center and surrounding area. Since the part and the bell 1 to the part connected to the main body are puffed and coated with adhesive 4,
The adhesion rubber and the cover rubber have good contact, the steel cord is completely sealed, no moisture or dust can enter, and there is no risk of deterioration in the quality of the belt.

(6) Furthermore, by molding out the first mold in item (5), there is no fear that the vulcanized cover rubber, which is the single layer of the cover, will peel off from the belt body before the start of the welding work, and it will not puff up especially at the beginning of the welding work. Make a cut in the treated area with a knife, etc.
After that, the Jj bar rubber, which is a single layer of the cover, can be easily peeled off and covered, and the time required for joining the bell 1 to the bell 1 can be shortened.

(7) As mentioned above, the competition V belt of the present invention does not require any inclusions such as a partition layer between the cover rubber and the steel cord when manufacturing its terminal joint structure, and the work of disassembling the steel cord is extremely easy. Since it is simple, there is less burden on the factory in terms of manufacturing, and the processing time can be significantly shortened.

[Brief explanation of the drawing]

Figure 1 is a plan view in which lines are drawn on both ends of the cover rubber by accurately measuring the position and dimensions of the joining part, and Figure 2 is a plan view of the cover rubber, which corresponds to the part to be joined at the end of the belt, made of different rubber. Figure 3 is a perspective view of the vulcanized cover rubber with a pair of cord grooves, and Figure 4 is a cross-sectional view of the part where the end of the belt is to be joined, with the cover layered in one layer. It uses vulcanized cover rubber with a cord groove. 1...Cover rubber, 2.2'...Cutting line, 3.
...Part to be joined, 4.4'...Different rubber, 5...
Steel cord adhesive rubber, 6...Steel cord 7
．． 7'...Vulcanized cover rubber with hood groove, 8...
Rubber for bonding steel cords, 9.9'...unvulcanized rubber. Procedural amendment (voluntary) July 28, 1981 1, Indication of case 1981 Patent Application No. 9744
6 No. 2, Name of the invention Conveyor belt 3, Relationship with the case of the person making the amendment Patent Representative of the applicant Shigeo Kushigi 4, Agent 〒650 Procedural amendment (voluntary) Mr. Manabu Shinaga, Commissioner of the Patent Office ■, Case Indication of 1981 Patent Application No. 9744
6 No. 2, Name of the invention Conveyor belt 3, Relationship with the case of the person making the amendment Patent Representative Shigeo Yatsumoto 4, Agent 650 6, Specification subject to amendment 7 Contents of amendment Description 6,22 Description 10 Name of the invention Conveyor belt 2, Claims (1) A steel cord is arranged parallel to the longitudinal direction of the belt, and is bonded to the upper and lower surfaces of the belt. In the elastic belt, which has cover rubber layers through adhesive rubber, the cover rubber layers corresponding to the parts to be joined at both ends of the heald are weak against the adhesive rubber. A conveyor belt having an end joint structure characterized by: (2) The conveyor belt according to claim 1, wherein the release rubber material is an unvulcanized rubber material different from the cover rubber. (3) The conveyor belt according to claim 1, wherein the peeling rubber material is a vulcanized rubber sheet with cord grooves on the back surface. 3. Detailed Description of the Invention The present invention relates to conveyor belts, and in particular to the end joint structure of steel cord conveyor belts. Traditionally, end joints of steel cord conveyor belts have been performed under all kinds of adverse conditions, such as the environmental conditions of the construction site, location conditions, working conditions, and restrictions on conveyor stop time. It is desired to shorten the working time required for joining the ends of this conveyor belt. Japanese Patent Application No. 55-61827 (Japanese Unexamined Patent Publication No. 55-61827 No. 152,944) discloses an invention in which a joint manifold of a steel cord conveyor belt is provided with an end section having a structure convenient for repair, and a partition layer is provided between the end surface of the end section and the steel cord. , this partition layer is a belt provided at a certain distance from the belt end in order to protect the steel cord from intrusion of foreign matter,
The cover rubber can be easily peeled off and the individual cords can be easily patched together, greatly reducing the work time required to join the ends of the belt at the construction site. However, although the above-mentioned invention reduces the working time at the construction site, it has the disadvantage that the manufacturing process of Bell I in the factory must be stopped for a long time to process, which is a heavy burden on the manufacturing side. The present invention has been developed in view of the above-mentioned points, and it not only reduces the work time required to join the ends of belts at the construction site, but also allows the process to be performed simply and quickly without stopping the manufacturing process in the factory for a long time. The purpose is to provide a steel cord heald with a processable end joint structure. Hereinafter, the manufacturing procedure of the conveyor belt of the present invention will be explained with reference to the drawings. First, a manufacturing line for steel cord belts, which is the premise of the present invention, will be explained. In other words, a steel cord conveyor belt is obtained by feeding multiple steel cords in parallel to the width direction of the belt with constant tension, and then laminating upper and lower cover rubber layers on top and bottom of the cords with rubber for adhering the steel cords in between. . Here, in the process before laminating the cover rubber layer, as shown in Figure 1 (belt plan view), the position and dimensions of the joint are drawn on both ends of the cover rubber using accurate measurements. (Draw lines not only on the front side of the cover rubber but also on the back side.) Here, 1 is cover rubber, 2.2
"" is a planned peeling line marked on the surface of the cover rubber. Then, a cut is made along the planned peeling line 2.2', and the cover rubber corresponding to the part 3 to be joined is removed. Next, as shown in Figure 2. Then, put a peeling rubber material 4.4' prepared in advance with exactly the same thickness, width, etc. as the cut out part into the part where the cover rubber corresponding to the part to be joined is cut out, and insert it through the steel cord adhesive rubber 5. The steel cord 6 is sandwiched and laminated and integrated. Here, the rubber composition constituting the release rubber material includes, for example, unvulcanized EPDM (ethylene propylene diene rubber), IIR (butyl rubber), or a blend thereof. A rubber composition containing about 1/200 mole or more of a thiuram-based vulcanization accelerator, or a composition containing silicone rubber (rubber content 40%) of 1 or more (15 pH), or a composition containing the silicone rubber. Based on experience, those with low adhesion (0.1 to 10 kg/25 m+n width) to steel cord adhesive rubber (compounds made of NR, SBR, etc.), such as those containing 30 pHR or more of calcium carbonate, are particularly suitable. In addition, it is preferable to use a compound containing the silicone rubber described above, without adding carbon black, and to distinguish it from the belt body by color, as this will serve as a mark for the peeled part when joining the ends of the belt. Rubber that can have the same thickness and width as the removed cover rubber after pasting on the part where the cover rubber corresponding to the planned part is removed, and that matches the use of the belt in terms of cord diameter, cord pinch, and number of cords, etc. Put the cord grooved vulcanized cover rubber 7.7゛ (see Figure 3), which is divided into upper and lower halves along the line connecting the cord center lines using a mold, and sandwich the steel cord 6 through the steel cord adhesive rubber 8. (See Figure 4). At this time, since the vulcanized flow cover rubber for the cord groove A1 is a vulcanized flow, the adhesion with the adhesive rubber for steel cord is low, so there is little ( It is also possible to huff and apply adhesive to the periphery and center of the bonding surface (back side) of the same cover rubber, as well as the part that will be joined to the heald body, to prevent it from peeling off before the on-site joining work begins. Thus, for a steel cord conveyor belt having a heald end structure configured as described above, the heald end joining work is performed at the construction site as follows. Cut with a cutting machine along the planned peeling line 2'' at the section to remove the end part. Next, the peeling rubber material 4.4'' or the cord grooved vulcanized flow cover rubber 7.7'' of the planned joint area is cut on the front and back. It also peels off. Next, the adhesive rubber exposed by peeling off the release rubber material 4.4' or the cord grooved vulcanized rubber 7.7° is canted at each interval between the cords and huffed as appropriate. Thus, the other end of the heald is similarly treated;
The belt is turned over so that the steel cords coated with adhesive rubber at both ends of the belt are placed adjacent to each other alternately.
As shown in the cross-sectional view of the heald joint, 9.9" unvulcanized rubber is attached from above and below, and then vulcanized and integrated to complete the belt joining operation. Hereinafter, the effects of the present invention will be explained. (1) The area where the end of the heald is scheduled to be joined has a low adhesive force with the adhesive rubber instead of the heald cover rubber (0.1 to 10k).
g/25 order) Release rubber material, e.g. E l) D M
, j I R, silicone rubber, etc., so that peeling at the construction site can be done very easily and smoothly without using a knife or the like, and the time required for the joining work is significantly shortened. (2) In addition, until the end joining work starts at the construction site, as mentioned above, the adhesive strength of the peeling rubber material and the steel cord adhesive rubber at the part to be joined is 0.1 to 10 kg/25 m.
Since the length is approximately 1.5 m, there is no fear that the peeling rubber material will peel off from the belt body during work such as retracting the heald. (3) Additionally, the release rubber material used is unvulcanized, and as it is vulcanized during manufacturing, the steel cord is completely sealed, and there is no risk of moisture or dust entering through the joint with the belt body. It does not adversely affect the quality of the belt. (4) On the other hand, in the example in which a vulcanized flow cover rubber with cord grooves is used as the single layer of the cover, the vulcanized cover rubber has steel cords sandwiched between the upper and lower surfaces through steel cord adhesive rubber. Since the adhesive rubber between the cords is connected in a very thin manner, cutting of the rubber between the cords is very easy, and the time required for heald joining work at the construction site is further shortened. (5) In the other examples mentioned above, the unvulcanized steel cord adhesive rubber is finally vulcanized, and the coat groove 1, which is a single layer of the cover (1), the back side of the vulcanized cover rubber is the surrounding part. Since the central part and the part connected to the belt body are puffed and coated with adhesive, the adhesion between the adhesive rubber and the cover rubber is good, and the steel cord is completely sealed, preventing moisture and dust. (6) Furthermore, due to the reason mentioned in (5), the vulcanized cover rubber with the cord groove, which is a single layer of the cover, should be removed from the main body of the bell 1 before the joining work begins. There is no risk of it peeling off from the surface, and when you start joining work, you just need to use a knife to put in the lino in the areas that have been huffed, and then you can easily peel off the cover rubber, which is the first layer of the cover, and you can use it for Hell I and joining work. The time required is shortened. (7) Furthermore, as mentioned above, the present invention's connector head does not require any inclusions such as eyebrows between the cover rubber and the steel coat when manufacturing the terminal joint structure. Since the process of scraping the steel cord is extremely simple, there is less burden on the manufacturing side at the factory, and the processing time can be significantly shortened. 4. Brief explanation of the drawings Figure 1 shows that the rubber cover has been pre-processed at both ends. A plan view of the line IW drawn after positioning and dimensioning the joining part using accurate measurements. Figure 2 shows the heald end where the cover rubber corresponding to the planned joining part of the belt αMi !at≦ has been replaced with a peeling rubber system. Fig. 3 is a perspective view of a pair of vulcanized cover rubber with cord grooves, and Fig. 4 is a cross-sectional view of the part where the belt ends are to be joined, showing a vulcanized cover with cord grooves as one layer of the cover. It uses rubber. Figure 5 shows bells 1 to 1.
It is a sectional view of a joint part. ■...Kahago J., 2-. 2'... Planned peeling line, 3... Part to be joined, 4, 4'... Rubber material for peeling, 5... Rubber for adhering steel cord, 6... Steel cord, 7,7゛...Vulcanized cover rubber with cord groove, 8...Rubber for adhering steel cord, 9,9゛・
...Unvulcanized rubber.

Claims (1)

[Claims] In an elastic belt, in which a steel cord is arranged flat in the longitudinal direction of the belt, and a cover rubber layer is provided on one side and the bottom side of the belt through an adhesive rubber, the joining portion of both ends of the belt is Corresponding) Conveyor bell with an end joint structure in which the J bar rubber layer is replaced and vulcanized with an unvulcanized rubber material different from the cover rubber or with a vulcanized rubber material with cord grooves on the back side. .