JPH0439208Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a conveyor belt having a structure in which wear-resistant chips are exposed on the surface. The present invention can be used for conveyor belts that transport sintered ore, coke, etc.

[Conventional technology]

In recent years, Utility Model Publication No. 18215 or Japanese Patent Application Publication No. 1982-
A conveyor belt with a structure in which wear-resistant chips are exposed on the surface, as described in Japanese Patent No. 96213, has been developed. This conveyor belt consists of a belt main body made of rubber and a large number of wear-resistant chips having vertical holes embedded in the belt main body. This conveyor belt has improved heat resistance and wear resistance.

[Problem that the invention attempts to solve]

By the way, in the conveyor belt described above, the rubber filled in the vertical holes is held by the engagement force with the wear-resistant chips and the adhesive force between the wear-resistant chips and the rubber, so if used for a long period of time, , the wear-resistant chip may fall off from the belt body. The main reason for this is that in addition to the loss of adhesive strength due to thermal fatigue, the rubber around the wear-resistant chips is worn away, and the conveyor belt is bent by the drive pulley and driven pulley that reverse the conveyor belt. It is thought that this is because a pull-out force acts between the belt body and the wear-resistant chip, which causes the wear-resistant chips to float up from the belt body.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to provide a conveyor belt that improves the problem of wear-resistant chips falling off.

[Means to solve the problem]

A conveyor belt according to the present invention is comprised of a belt main body made of rubber and a large number of wear-resistant chips laid at intervals on the upper surface of the belt main body, the surfaces of which are exposed. , a horizontal hole extending substantially parallel to the exposed surface, and at least two vertical holes extending in the thickness direction and communicating with the horizontal hole and communicating with the belt body on a surface facing away from the exposed surface. The belt body is characterized in that it has a hollow engagement hole consisting of a portion, and a horizontal hole portion and a vertical hole portion of the hollow engagement hole are filled with a portion of the rubber of the belt body.

A joint rubber is provided between the wear-resistant chips. When the wear-resistant chips are laid at a high density, the width of the joint rubber between the wear-resistant chips is small. On the other hand, when the density of the wear-resistant chips is low, the width of the joint rubber between the wear-resistant chips is large. The spacing between the wear-resistant chips can be approximately 2 to 5 mm, taking into consideration prevention of wear-resistant chips from falling off and ensuring trough performance of the conveyor belt. Wear-resistant chips are usually made of ceramics,
Can be made of metal. Alumina, silica, zirconia, etc. can be used as ceramics. The thickness, width, length, and shape of the wear-resistant chips are appropriately set depending on the type of conveyor belt. The planar shape of wear-resistant chips is angular shapes such as hexagons, squares, and rectangles.
The hollow engagement hole, which can be circular in shape, has a horizontal hole formed inside the wear-resistant chip along the exposed surface, and a vertical hole that communicates with the horizontal hole and opens on the surface facing away from the exposed surface. It is formed by. In this case, when the belt body and the wear-resistant tip are integrally molded, the rubber enters the hollow engagement hole through the opening of the vertical hole portion formed on the surface opposite to the exposed surface.
A gas vent hole can be formed in the hollow engagement hole to communicate the inside of the hollow engagement hole with the outside air. This is to improve gas discharge performance during molding of the belt main body and ensure rubber loading into the hollow engagement hole.

It is desirable that the wear-resistant chip has a stepped portion on its side periphery, the exposed surface of which is narrower than the opposite surface and with which a portion of the belt body engages. This is because it is advantageous for improving trough properties, as will be described later.

Preferably, an adhesive layer is interposed between the wear-resistant chip and the belt body. In particular, it is desirable that an adhesive layer be interposed between the wall surface that partitions the hollow engagement hole and the rubber portion loaded into the hollow engagement hole. This is because it is advantageous in improving the drop-off property of wear-resistant chips. An adhesive layer can be interposed on the side of the periphery of the wear-resistant chip that faces away from the exposed surface. The wear-resistant chips can be staggered on the belt body.

[Effect]

When using the conveyor belt according to the present invention, the conveyor belt is stretched between a driving pulley and a driven pulley. The conveyor belt is then rotated by rotation of the drive pulley. Objects such as sintered ore are placed on the rotating conveyor belt and transported. During such conveyance, the wear-resistant chips are located on the side of the conveyance surface. Therefore, the wear-resistant chips can ensure the wear resistance and heat resistance of the conveyor belt.

By the way, when a conveyor belt is used for a long period of time, the joint rubber between the wear-resistant chips wears out, the joint rubber between the wear-resistant chips becomes fatigued, and the adhesive force between the rubber and the wear-resistant chips weakens due to thermal fatigue. It disappears. Therefore, the wear-resistant chips tend to fall off when passing through the pulleys, but in the conveyor belt according to the present invention, the hollow chips are formed so as to communicate from one vertical hole to the other vertical hole through the horizontal hole. A portion of the rubber portion is loaded into the engagement hole, and the rubber portion and the wall surface of the wear-resistant chip itself that partitions the hollow engagement hole are irremovably engaged with the belt body in an arch shape. Therefore, even if the adhesive force between the wear-resistant chip and the rubber is lost, the wear-resistant chip will not fall off. Furthermore, since the rubber portion within the hollow engagement hole is surrounded by the wall surface that partitions the hollow engagement hole, it is hardly subject to fatigue or wear. Therefore, even if the joint rubber between the wear-resistant chips wears out or gets fatigued and the adhesive force between the wear-resistant chips and the rubber is lost, the wear-resistant chips will not fall off from the belt body.

[Effect of idea]

As explained above, in the conveyor belt according to the present invention, a portion of the rubber is inserted into the hollow engagement hole formed so as to communicate from one vertical hole of the wear-resistant chip to the other vertical hole through the horizontal hole. When loaded, the wear-resistant chips are irremovably engaged with the belt body in an arch shape, and the rubber inside the hollow engagement hole can suppress fatigue and wear, and the joint rubber between the wear-resistant chips can be worn out or Even if the wear-resistant chip becomes fatigued and the adhesive force between the wear-resistant chip and the rubber is lost, the wear-resistant chip will not come out from the belt body due to the rubber portion loaded into the hollow engagement hole.

In particular, when an adhesive layer is interposed between the wall surface that partitions the hollow engagement hole and the rubber loaded into the hollow engagement hole, fatigue of the adhesive layer can be suppressed.
The fatigue effect caused by the adhesive layer lasts for a long period of time, and the problem of wear-resistant chips falling off can be further improved.

Further, when the wear-resistant chip has a stepped portion on its side periphery where the exposed surface becomes narrow, the trough performance of the conveyor belt can be improved. That is, when a hollow engagement hole is formed in a wear-resistant chip, the thickness of the wear-resistant chip tends to increase as the size of the hollow engagement hole is taken into account. Therefore, it is difficult to warp when compressive force is applied to the conveying surface side of the conveyor belt. However, since the wear-resistant chips have a stepped portion and are narrow on the exposed surface side, even if a large number of wear-resistant chips are laid, the joint rubber width between the wear-resistant chips on the conveying surface side can be secured as much as possible. Therefore, even if the conveyor belt is warped so that compressive force is applied to the conveying surface side of the conveyor belt, the amount of warp can be ensured, which is advantageous in ensuring the trough performance of the conveyor belt.

〔Example〕

An embodiment of the conveyor belt according to the present invention will be described below. The conveyor belt according to this embodiment is a conveyor belt that is used to convey sintered ore having a maximum particle size of about 200 mm and a maximum temperature of about 110°C. This conveyor belt consists of a belt main body 1 made of rubber as a base, and a large number of wear-resistant chips 3 which are laid at intervals on the upper surface of the belt main body 1 and whose surfaces are exposed surfaces 30. The belt main body 1 has a reinforcing layer 1 made of canvas.
0 is embedded.

The wear-resistant chip 3 has an exposed surface 30 and a surface 31 facing backward.
It has a hollow engagement hole 32 which is opened and into which a part of the rubber part 11 of the belt body 1 is loaded and engaged. A joint rubber is provided between the wear-resistant chips 3. The distance between the wear-resistant chips 3 can be set to about 3 to 5 mm in consideration of preventing the wear-resistant chips 3 from falling off and ensuring the trough performance of the conveyor belt.
The wear-resistant chip 3 is made of alumina ceramics. The planar shape of the wear-resistant chip 3 is a regular hexagon. The thickness of the wear-resistant chip is 9 mm.

The hollow engagement hole 32 includes horizontal holes 33 and 34 formed inside the wear-resistant chip 3 along the exposed surface 30;
Vertical hole portions 35, 36, 37, 3 that communicate with the horizontal hole portions 33, 34 and open at the surface 31 facing the exposed surface 30.
8,39. In this case, when the belt body 1 and the wear-resistant chip 3 are integrally molded, rubber enters through the openings of the vertical holes 35, 36, 37, 38, and 39 and reaches the horizontal holes 33 and 34. Holes 40 and 41 are formed in the hollow engagement hole 32 to communicate the inside of the hollow engagement hole 32 with the outside air. Hole 39, 40
When molding the belt main body 1, that is, when filling rubber into the hollow engagement hole 32 to form the rubber part 11, the hollow engagement hole 32 is made to have good gas discharge performance, and the hollow engagement hole 32 is filled with rubber. This is to ensure that the rubber can be loaded into the hole 32. Horizontal hole portions 33, 34 and vertical hole portion 3
5, 36, 37, and 38 have circular cross sections. In this case, the horizontal holes 33, 34 and the vertical holes 35, 36, 3
The diameters of 7, 38, and 39 are approximately 4 to 6 mm. The wear-resistant chip 3 has a stepped portion 42 on its side periphery that is narrower on the exposed surface 30 side and engages with the joint rubber of the belt body 1.
is formed. The stepped portion 42 is formed at a position half the thickness of the wear-resistant chip 3. Because of the stepped portion 42, the length of one side of the wear-resistant chip 3 on the exposed surface 30 side is
The length of one side of the wear-resistant chip 3 on the surface 31 side is 16 mm. An adhesive layer is interposed between the belt body 1 and the side peripheral portion 43 of the wear-resistant chip 3 below the stepped portion 42. Further, an adhesive layer is also interposed between the wall surface of the wear-resistant chip itself that partitions the hollow engagement hole 32 and the rubber portion 11 loaded into the hollow engagement hole 32. In this embodiment, as shown in FIG. 4, the wear-resistant chips 3 are arranged in a staggered manner on the belt body 1 in order to increase the laying density. Therefore, most of the objects to be transported are transported by wear-resistant chips 3.

When using the conveyor belt according to this embodiment, the conveyor belt is stretched between a driving pulley and a driven pulley. The conveyor belt is then rotated by rotation of the drive pulley.
Objects such as sintered ore are placed on the rotating conveyor belt and transported. During such transportation, the exposed surface 30 of the wear-resistant chip 3 is located on the transportation surface side. Therefore, the wear-resistant chips 3 can ensure the wear resistance and heat resistance of the conveyor belt.

By the way, when the conveyor belt is used for a long period of time, the rubber joints between the wear-resistant chips 3 are worn out, and the rubber joints between the wear-resistant chips 3 become fatigued. Furthermore, the adhesive layer between the wear-resistant chip 3 and the rubber is destroyed due to thermal fatigue. In this embodiment, the wear-resistant chip 3 is irremovably engaged with the belt body 1 by the rubber portion 11 loaded into the hollow engagement hole 3. Therefore, the rubber portion 11 inside the hollow engagement hole 32
Since it is surrounded by the wall surface that partitions the hollow engagement hole 32, it is suppressed from thermal fatigue and is not subject to wear and tear caused by conveyed objects. Therefore, during use, wear-resistant chips 3
Even if the joint rubber between the two wears out and the adhesive strength between the rubber and the side circumferential portion 43 of the wear-resistant chip 3 is lost due to thermal fatigue, the wear-resistant chip 3 will continue to function as long as the rubber portion 11 does not break. It will not fall off from the belt body 1. In particular, in this embodiment where an adhesive layer is interposed between the wall surface that partitions the hollow engagement hole 32 and the rubber part 11 loaded in the hollow engagement hole 32, the heat of the adhesive layer, etc. Since fatigue is suppressed, the adhesive effect of the adhesive layer lasts for a long time,
The problem of the wear-resistant chip 3 falling off can be further improved. In addition, in the conveyor belt according to this embodiment, which has a stepped portion 42 on the side circumferential portion 43 of the wear-resistant chips 3, where the exposed surface 30 becomes narrow, even when a large number of wear-resistant chips 3 are laid, the joints on the conveying surface side The width of the rubber can be secured as much as possible.

Therefore, when the conveyor belt is warped so that a compressive force is applied to the conveying surface side of the conveyor belt, the amount of warp can be ensured, which is advantageous for ensuring the trough performance of the conveyor belt.

It goes without saying that a wear-resistant chip having the structure shown in FIG. 6 may also be used.

[Brief explanation of the drawing]

The drawings show examples, and FIG. 1 is a plan view of the wear-resistant chip, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG.
Fig. 3 is a sectional view along the - line in Fig. 1, Fig. 4 is a plan view of the main part of the conveyor belt, Fig. 5 is a sectional view of the main part of the conveyor belt, and Fig. 6 is a cross-sectional view of the main part of the conveyor belt. FIG. In the figure, 1 is the belt body, 3 is the wear-resistant chip, 30
32 represents an exposed surface, 32 represents a hollow engagement hole, and 42 represents a stepped portion.

Claims (1)

[Claims for Utility Model Registration] (1) A conveyor belt consisting of a belt body made of rubber and a large number of wear-resistant chips placed at intervals on the upper surface of the belt body and having exposed surfaces, The wear-resistant chip has a lateral hole extending substantially parallel to the exposed surface and at least two holes extending in the thickness direction and communicating with the lateral hole and communicating with the belt main body which is open on a surface facing away from the exposed surface. A conveyor belt having a hollow engagement hole consisting of vertical holes, and a portion of the rubber of the belt body is filled in the horizontal and vertical holes of the hollow engagement hole. . (2) The conveyor according to item 1 of the utility model registration claim, in which the wear-resistant chip has a stepped portion on its side circumference, the exposed side of which is narrower than the opposite side and with which a part of the belt body engages. belt. (3) The first claim of the utility model registration claim in which an adhesive layer is interposed between the wear-resistant chip and the belt body
Conveyor belt as described in section. (4) The utility model according to claim 1, wherein an adhesive layer is interposed between the wall defining the hollow engagement hole of the wear-resistant chip and the rubber portion loaded in the hollow engagement hole. conveyor belt. (5) The conveyor belt according to claim 1, wherein the wear-resistant chip has a surface having one of a regular hexagonal shape, a square shape, a rectangular shape, and a circular shape.