JPS59223613A - Convey belt - Google Patents

Abstract

PURPOSE:To joint together terminals of a belt in a short time, by a method wherein only the cover rubber layers of a joint estimating part between the surface of the end and the back surface of the other end of a belt are temporarily adhered to each other, and each steel cord of such portion is brought into nonadherence to an adhering rubber and the cover rubber layer. CONSTITUTION:When the terminals of a belt coveyor 1 are joined together, cut is first effected along a cut start line 2 stamped on the surface of a cover rubber 5 which is a joint estimating part at the one end of the belt 1, the cover rubber 5 is peeled off through a way to a cut terminal line 2' to bring into a half- peeled-off state. Thereafter cuts 8 are made in a peeled-off surface 6 by the diameter of a cord 7 along both sides of the cord 7 in relation to each of the steel cords 7. A special knife is placed in the cut 8 and rises up the cord 7 to separate the cord from an adhering rubber, and the separated cord 7 is reburied in an original groove. After adhesives are applied on the reburied cord 7 and the adhering rubber of a peeled-off surface exposed between the cords 7, the cover rubber 5 is stuck to the peeled-off surface.

Description

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

Conventionally, the end joining of steel cord conveyor belts has been carried out under various conditions such as environmental conditions, location conditions, working conditions, and restrictions on conveyor stop time at the construction site. desired.

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 present invention provides an end section with a structure convenient for succession or repair of steel cord conveyor belts, and provides a partition layer between the end surface of the end section and the core material, which prevents the core material from being infiltrated by foreign matter. The belt is installed at a certain distance from the end of the belt to protect it from damage, and the cover rubber (surface layer) can be easily peeled off, making it easy to separate individual cords, and the end of the belt can be joined at the construction site. This greatly reduces the work time required.

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 made in view of the above points, and includes 6fu
I Steel cord competition (7 belts) has an end joining structure that not only reduces the work time required to join belt ends on site, but also allows for simple and quick processing without having to stop the belt manufacturing process in the factory for a long time. It is intended to provide.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The conveyor belt of the present invention will be explained below with reference to drawings showing its manufacturing procedure.

First, as shown in FIG. 1 (belt plan view), a line is drawn on both ends of the steel cord conveyor belt to determine the position and dimensions of the joint part (lines are drawn on both the front and back sides of the bell 1). Here, 1 is the belt main body, 2 is a cut start line marked on the cover rubber on the belt surface, 2' is a cut end line, 3 is a portion to be joined, and 4 is a non-peelable portion.

Second, as shown in Figure 2 (belt perspective view), use a knife to trace the cut start line 2 marked on the surface of the cover rubber of the joint portion 3 at one end of the steel cord conveyor belt over the entire width of the belt. Make a cut on the top surface to the cut end line, and peel off the cover rubber 5 to the cut end line to open one side.

Thirdly, as shown in FIG. 3 (cross-sectional view of the bell 1), the steel lard 7
Cuts 8 are made along both sides of each cord by the diameter of the cord.

Fourth, as shown in Fig. 4 (a) (b) (=] Cord release work explanatory diagram), insert the special knife 9 into the cut portions made on both sides of the cord, and make the cut start line and cut end line. Raise the cord 7 between the lines and completely separate it from the adhesive rubber (not shown for drawing reasons) that is adhered to the cover rubber on the bottom surface, then bend it, and the disconnected cord will return to the original groove where it was cut (adhesive). (formed in rubber).

Fifth, apply room-temperature adhesive to the adhesive rubber part of the peeled surface exposed between the backfilled cords, avoiding applying it to the steel cord as much as possible, and also apply the same adhesive to the peeled cover rubber side. A room-temperature adhesive is applied to the part of the peeling surface that comes into contact with the room-temperature adhesive-applied surface (not shown).

When the applied adhesive is semi-dry, attach the peeled cover rubber to the peeled surface and use a pressure machine to adhere it (apply 1q of low adhesive force of about 0.25 to 2.5 kg/C1112 to this) ). .

By the way, when applying room-temperature adhesive, apply it to at least the shaded area 10 as shown in Fig. 5 to prevent moisture, dirt, etc. from entering the peeling surface and the steel cord, and apply it to the entire surface or only partially. The choice of whether to apply the cover rubber depends on the thickness (m) of the cover rubber.

Furthermore, when the cover rubber is bonded to the peeled surface, if the cover rubber shrinks, a gap will be created between the belt body and the cover rubber. Attach the cover rubber 11.

In the above embodiment, a method was described in which only one side of the part to be joined is peeled off, the cord is separated from the adhesive rubber, raised, the cord is returned to its original groove, and the cover rubber is temporarily attached to the peeled surface. As another example, the cover rubber may be completely cut off by applying the same treatment as described above to both sides of the part to be joined, and then temporarily attached to the peeling surface again using room temperature adhesive.

However, in the conveyor belt of the present invention, one end of the belt 1 is joined at the construction site as follows. That is, at the end of the belt body 1, the non-peelable part 4 is cut out along the cut end line 2' using a cutting machine.Then, the cover rubber 5 of the part to be joined 3 is cut off on the cut start line 2 side or Make a gripping margin from the cut end line 2' side and peel it off.Similarly, peel off the lower cover rubber and separate the cords.The cords at both ends to be jointed are combined appropriately to form an endless part, and then the conventional method -C Pressure, heat and vulcanize to integrate.

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

(1) Since the peeled cover rubber layer is temporarily attached to the surface of the belt end where it is planned to be joined using room-temperature adhesive, it is easy to apply even if external forces (compression, friction, etc.) are applied. (There is no risk of moisture or dust entering the peeling surface or the cord surface of the 8 cords until the end joining work begins at the construction site, so the joint strength at the time of joining and the quality of the belt can be improved.)
has no adverse effect on

(2) During the joining work at the construction site, when disassembling the part of the belt/end that is scheduled to be joined, the cover rubber is only temporarily attached to the peeling surface with room-temperature adhesive, so part of the cover rubber must be peeled off. If you create a gripping margin by using a machine or the like, you can remove the cover rubber very smoothly and cleanly by pulling it with a machine, etc., and the rubber cover will not be integrated with the rubber, but will be separated. There is no need to cut the rubber, and the time required for joining work is significantly shortened.

(3) The part to be joined at the end of the belt is from the cut start line to the cut end line, and the cover rubber in this area is temporarily attached to the peeled surface after being peeled off, but from the cut end line to the cut end line. Since the cover rubber up to the end of the belt has not been peeled off (non-separated part), there is no risk of moisture or foreign matter entering from the end surface of the belt. Only by cutting out the joint end surface can it be exposed.

(4) In addition, the conveyor 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 end joint structure, and there is no need to disassemble the steel cord. There is less burden on the manufacturing side, and the processing time can be significantly shortened.

[Brief explanation of the drawing]

, Figures 1 to 6 show the manufacturing procedure of the end joint structure part of the conveyor belt of the present invention, and Figure 1 shows the positioning and dimensioning of the joint part and drawing lines on both ends of the steel cord conveyor belt. Figure 2 is the top view of Figure 1.
Figure 3 is a perspective view of the part to be joined at one end of the belt from the cut start line to the cut end line; ) is a code
4(b) is a side view of the essential parts, FIG. 5 is a plan view showing the area where room-temperature adhesive is applied at the part to be joined at one end of the belt, and FIG. 6. The gap caused by the contraction of the cover rubber at the joint 611 at one end of the belt is vulcanized cover rubber Cll! FIG. 1... Belt body, 2... Cut start line, 2'...
Cut end line, 3... Part to be joined, 4... Non-peeling part, 5... Cover rubber, 6... Peeling surface, 7... Steel cord, 8... Notch, 9...・Special knife,
1o...shaded area, 11...vulcanized cover rubber.

Claims (1)

[Claims] In an elastic belt in which steel cords are arranged and installed in parallel to the longitudinal direction of the belt, and cover rubber layers are provided on the upper and lower surfaces of the belt through adhesive rubber, at least one belt is attached.
- Only the cover rubber layer of the part to be joined between the surface of one end and the back of the other end is temporarily attached, and each steel cord in that part is in a non-adhered state with the adhesive rubber and the cover rubber layer. A conveyor belt with a new end joint structure.