JPH11286307A - Wrapping type conveyor belt for flat pulley - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent cover belts from floating from a pulley when the cover belts ride across a head flat pulley, and to prevent the cover belts at a returning side from high drooping caused by dead weight by increasing lateral rigidity with the elongation of the cover belts in the longitudinal direction of the belts highly assuring in a wrapping type conveyor belt. SOLUTION: This wrapping type conveyor belt integrally bonds two cover belts 21 having half of the width of a base belt each other at the ends in the width direction at opposite sides and placed on the upper surface of the base belt. The cover belts 21 wrap a transporting product mounted on the base belt from the upper side of the cover belts 21 for transportation. In this case, a cord fabric canvas 42 formed by linking thick wefts 44 to thin warps 46 is buried in the interior of each cover belt 21. The result provides lateral rigidity in the width direction of the belts with high rigidity with elastic elongation in the longitudinal direction of the cover belts 21 highly retaining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapped conveyor belt, and more particularly to a wrapped conveyor belt for flat pulleys.

[0002]

2. Description of the Related Art
Envelope conveyor belts are known. This wrapped-type conveyor belt has a form in which two cover belts each having a substantially half width of the base belt are integrally joined on the upper surface of the base belt at respective widthwise ends on opposite sides. Two cover belts are opened near the start end (near the tail pulley), and the conveyed object is placed on the base belt through the opening formed there. Then, the cover belt is closed and the conveyed object is moved upward by the cover belt. After transporting the conveyed object in that state, the cover belt is opened again near the end position and on the return side to drop the conveyed object through the opening.

In the case of this wrapping type conveyor belt, as shown in FIG. 7, a base belt (200 in the figure) is generally formed on a transport side by a carrier roll having a trough shape.
That is, the horizontal roll (202 in the figure) and a pair of left and right inclined rolls (204 in the figure) are bent upward in a trough shape, and conveyed materials (206 in the figure) such as crushed stone, ore, cement, coal, coke, etc. ) And transport. At this time, the cover belt (208 in the figure) wraps the conveyed object from above while maintaining a substantially horizontal or close shape and posture.

Therefore, according to the wrapping type conveyor belt, it is possible to prevent the transported object from being scattered by wind or the like. Also, on the return side, the cover belt covers the conveying surface of the base belt, so that the remaining conveyed matter adhering to the surface of the base belt drops downward in the returning process, and contaminates the surrounding environment. There is an advantage that can be prevented.

In a conveyor device using this wrap-in type conveyor belt, if a trough-shaped head pulley, ie, a U-shaped pulley, is used as the head pulley at the end of the conveying side, the shape or state shown in FIG. Can pass through the head pulley without difficulty.

On the other hand, in a conventional conveyor apparatus, a trough-shaped roll having the same configuration as that described above is used for a carrier roll, but a flat pulley for a head pulley, that is, a surface in contact with a back surface of a conveyor belt is horizontal. A flat pulley is used.

[0007] When the above-mentioned wrapped-in type conveyor belt is applied to such a conventional conveyor device, the conveyor belt is turned over over the head pulley while maintaining the shape or state shown in FIG. Become. At this time, the radius of rotation of the cover belt is larger than the radius of rotation of the base belt. Therefore, if the cover belt is configured in the same manner as a conventional belt, the elastic tension in the longitudinal direction of the cover belt is small. This causes a problem that the base belt, that is, the entire conveyor belt floats up from the head pulley.

As a countermeasure, it is conceivable to increase the elasticity in the longitudinal direction by increasing the flexibility of the cover belt. However, when simply increasing the elasticity of the cover belt by increasing the elasticity in the longitudinal direction, the problem of getting over the head pulley can be solved,
On the return side, the cover belt hangs greatly due to its own weight, which may damage the conveyor device and the conveyor belt, and the remaining conveyed matter adhering to the base belt surface on the return side may be covered by the cover belt. This causes a problem that the belt falls downward due to the hanging of the belt.

In a usual conveyor device, return rolls are also provided on the return side, and the cover belt is pressed against the base belt by the return rolls. However, the interval between the return rolls is large. Therefore, the cover belt hangs between the return rollers.

[0010]

The invention of the present application has been made to solve such a problem. According to the wrapping type conveyor belt of the present invention, two cover belts each having a substantially half width of the base belt are integrally connected to the upper surface of the base belt at opposite widthwise ends, respectively. In a wrapping type conveyor belt that conveys a load placed on the belt by wrapping it from above with the cover belt, the elastic elasticity of the cover belt in the longitudinal direction of the cover belt is set inside the cover belt. A flexible core material is embedded to increase the lateral rigidity in the belt width direction while maintaining elongation substantially equal to the elastic elongation of the cover belt and maintain the cover belt in a horizontal shape on the return side.

According to a second aspect of the present invention, there is provided the wrapping type conveyor belt according to the first aspect, wherein the core material comprises a plurality of horizontal wires arranged in the longitudinal direction of the belt and the horizontal wires before embedding in the cover belt. And a vertical wire that is linked in the longitudinal direction of the belt.

According to a third aspect of the present invention, in the wrapping type conveyor belt according to the second aspect, the weft wire and the warp wire are made of yarn, and the thickness of the weft is larger than the thickness of the warp. And

According to a fourth aspect of the present invention, there is provided the wrapping type conveyor belt according to any one of the first to third aspects, wherein the core material is a blind cloth.

According to a fifth aspect of the present invention, there is provided the wrapping type conveyor belt according to any one of the second to fourth aspects, wherein the vertical wire is cut under a condition of use of the belt to maintain the elastic stretch in the longitudinal direction of the cover belt. Characterized in that:

[0015]

As described above, according to the present invention, the lateral elasticity in the belt width direction is increased while maintaining the elastic elongation in the longitudinal direction of the cover belt substantially equal to the elastic elongation of the rubber in the cover belt. The core material is embedded inside the cover belt (claim 1). Here, maintaining the elastic elongation of the cover belt substantially equal to the elastic elongation of the rubber means that the elongation of the cover belt itself is maintained at 200 to 300%. That is, the elongation of a conventional belt for a conveyor device is 10%, while the elongation of the cover belt of the present invention is 200 to 300%.

On the other hand, in the case of the conveyor belt of the present invention, the lateral rigidity of the cover belt in the belt width direction is increased by burying the core material. In such a wrapping type conveyor belt of the present invention, even when a flat pulley is used as a head pulley, when the cover belt passes through the head pulley, the cover belt extends well in the longitudinal direction and the base belt Problem that absorbs the difference in the radius of gyration between the cover belt and the cover belt, and when the cover belt rides over the flat pulley like a conventional wrapped conveyor belt, it is strongly pulled in the longitudinal direction and the whole belt rises from the head pulley. Can be solved. In addition, by extending the cover belt in the longitudinal direction, it is possible to discharge the conveyed material at the head pulley when passing through the head pulley.

On the other hand, in the case of the wrapping type conveyor belt of the present invention, since the cover belt has increased lateral rigidity by burying the core material, the cover belt is horizontally held on the return side to cover the base belt. As a result, it is possible to satisfactorily prevent the rest of the conveyed material adhering to the base belt surface from falling down on the return side. Further, it is possible to prevent the conveyor device and the conveyor belt itself from being damaged due to the hanging down of the cover belt on the return side.

In the present invention, the core may be formed by linking a large number of horizontal wires arranged in the longitudinal direction of the belt with longitudinal wires in the longitudinal direction of the belt. Here, each vertical wire does not necessarily have to be continuous in the longitudinal direction of the belt, and may be partially divided in the same direction. In short, it is only necessary that the entire horizontal wire can be linked to each other in the longitudinal direction of the belt to maintain the alignment.

Here, the weft wire and the warp wire can be constituted by yarn, and the thickness of the weft can be made larger than the thickness of the warp. By configuring the core material in this manner, it is possible to effectively increase the lateral rigidity in the belt width direction while maintaining a high elongation in the longitudinal direction of the cover belt, and to provide the cover belt with a shape retaining function in the horizontal direction. it can.

[0020] In the present invention, the core material may be made of a blind woven canvas. Furthermore, the vertical wire can be made to have a strength to be cut under the conditions of use of the belt, so that a large elastic elongation in the longitudinal direction of the cover belt can be maintained (claim 5).

That is, in the present invention, the warp or other warp in the core is not expected to share the tensile strength in the longitudinal direction of the belt, and has a function of simply linking the wefts with each other and maintaining a predetermined arrangement. Anything is enough.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 denotes a conveyor device using the wrapping type conveyor belt 18 of the present embodiment.
Is a head pulley, 14 is a tail pulley, and 16 is a drive pulley. In this example, flat pulleys having a horizontal contact surface with the belt are used as the head pulley 12 and the tail pulley 14, similarly to the pulleys in the ordinary conveyor device. The wrapping type conveyor belt 18 is wound around these pulleys 12, 14, 16 in an endless loop.

Reference numeral 20 denotes a conveyor belt 18 on the transport side.
Is a carrier roll which deforms the trough into a trough shape and supports the trough. As shown in FIGS. 4 (C) and 4 (D), the carrier roll comprises a horizontal roll 26 and a pair of left and right inclined rolls 28.

In FIG. 1 and FIG. 4B, reference numeral 22 denotes a return roll for pressing a cover belt 21 of the conveyor belt 18 to be described later on the base belt 19 on the return side, and is disposed at predetermined intervals in the longitudinal direction of the belt. . In FIG. 1, reference numeral 24 denotes a hopper which is conveyed by the conveyor belt 18 and receives a conveyed object 34 dropped from the vicinity of the head pulley 12 on the return side.

FIG. 2 shows the structure of the wrapping type conveyor belt 18. In the figure, 19 is a base belt,
Reference numeral 21 denotes a cover belt of just half width of the base belt 19, and the widthwise ends opposite to each other are integrally joined to the upper surface of the base belt 19 with an adhesive 23 as shown in FIG. ing. However, in this example, the base belt 19 and the cover belt 21 are integrally vulcanized at the time of vulcanization.

In the case of the conveyor device 10 of this example, FIG.
As shown in FIG.
A plurality (four in this example) of guide rollers 30 in the vicinity
Are set up, and the guide rollers 30
The cover belt 21 of the conveyor belt 18 is pushed open to the left and right to form an opening 32, through which the carrier 34 enters the recess of the base belt 19 bent into a trough shape by the carrier roll 20.
Is loaded (see (B) and (C)).

After that, the conveyor belt 18 passes through the guide rollers 30 so that the guide rollers 3
0 is released, the cover belts 21 are closed with each other,
As shown in (D), the conveyed object 34 is wrapped from above. And in that state, the conveyor belt 18
Transports the transported object 34 to the left in FIG. In FIG. 4, (C) and (D) correspond to (C-
C) section and (DD) section respectively.

The conveyor belt 18 gets over the head pulley 12 at the left end position in FIG. A guide roller 30 is provided downward in the vicinity of the head pulley 12 and on the return side, and the cover belt 21 is pushed right and left by the guide roller 30 (see FIG. 5A). Is dropped onto the hopper 24 from the opening formed by spreading the cover belt 21. In this example, since the cover belt 21 can be greatly extended in the longitudinal direction, a part of the conveyed material 34 is dispensed by the opening of the cover belt 21 when passing through the head pulley 12, and falls downward. I do. Thereafter, the cover belt 21 is closed again by passing through the guide roller 30, and moves toward the tail pulley 14 rightward in FIG. FIGS. 5B and 5C show the state at this time. Here, (B) shows the state of the portion between the return rolls 22 and (C) shows the state of the portion of the return roll 22.

FIG. 3 shows a sectional structure of the cover belt 21. As shown in the figure, the cover belt 21 has two layers of a blind woven canvas 42 as a flexible core material between an upper rubber 36 and a lower rubber 38 via an intermediate rubber 40. Here, the weave canvas 42 is configured as shown in the following equation (1).

[0030]

(Equation 1)

More specifically, the warp yarn 46 composed of one 1260 denier yarn is 6 + 6 per 5 cm length, that is, 1 in total.
Two are arranged. Here, one numeral 6 of (6 + 6) represents the number of the warp yarns 46a in FIG.
The other numeral 6 represents the number of warp yarns 46b. On the other hand, the weft yarn is one thick weft yarn 44 obtained by twisting ten 1260 denier yarns, and the ten weft yarns 44 are arranged within a length of 5 cm. The material of the yarn is 6 nylon.

In this embodiment, the weft yarns 44 cover the cover belt 2
1 has a function of imparting a large lateral rigidity in the belt width direction. On the other hand, the warp yarns 46 have a function of linking the weft yarns 44 with each other in the longitudinal direction of the belt and maintaining a predetermined arrangement state. In this example, this warp 46
Is not particularly expected to enhance the tensile strength of the cover belt 21 in the longitudinal direction of the cover, and when the cover belt 21 is pulled in the longitudinal direction under the belt use conditions, the cover itself is partially or wholly broken. Thus, the cover belt 21 functions to maintain a large elongation in the longitudinal direction. In this example, the cover belt 21 is 200 to 30.
It has an elongation of 0%.

In this embodiment, the cover belt 21 has a total thickness of 3.4 mm, and the width of one cover belt 21 is 30 mm.
0 mm, and the base belt 19 has a width of 600 mm. The base belt 19 has two core canvases laminated between an upper cover rubber having a thickness of 3 mm and a lower cover rubber having a thickness of 1.5 mm. Here, the core canvas in the base belt 19 is a plain woven canvas having a configuration represented by the following formula (2).

[0034]

(Equation 2)

That is, two 1260-denier yarns are twisted to form warp yarns, and 41 of these yarns are arranged within a length of 5 cm. Also, two 1280 denier yarns are twisted to form one weft yarn, and 28 of these yarns are arranged within a length of 5 cm. The core canvas of the base belt 19 has basically the same form as that used in a general conveyor belt.

Next, by using the wrapping type conveyor belt 18 constructed according to the present embodiment and the wrapping type conveyor belt of the comparative example, the amount of belt floating on the head pulley 12 was calculated.
Table 1 shows the amount of hanging of the cover belt 21 and the length of the opening 32 (length in the belt longitudinal direction) on the return side.
It was as follows.

[0037]

[Table 1]

Here, the comparative example product has the following configuration. That is, the base belt has the same configuration as that of the above-described embodiment, and the cover belt has the same size as that of the above-described embodiment.
One of the above-mentioned core canvas used in the above is buried. In Table 1, the blind cloth 42 shown in FIG.
The result (No. 2) of the case where only one sheet was embedded as a core material is also shown. However, each number in the table is represented by a relative numerical value when the comparative example product is 1.

In Table 1, the length of the opening has the following meaning. That is, if the cover belt has a large elongation in the longitudinal direction, that is, if the cover belt has flexibility in the longitudinal direction, the necessary length of the opening 32 is reduced accordingly. Elongation in the longitudinal direction,
Represents flexibility.

In Table 1, No. 2 and No. 3 are examples of the present invention. As is clear from comparison between the examples and the comparative examples, the heads of the examples were There is no lifting of the belt in the pulley part, and the hanging of the cover belt on the return side is small (especially, the blind fabric 42 is laminated in two layers (No. 3)), and the opening length is also
It turns out that it is smaller than the comparative example product.

As described above, the wrapping type conveyor belt 18 of the present embodiment is constructed such that the
Embedded in the cover belt 21 to increase the lateral rigidity in the belt width direction while maintaining a large elongation in the longitudinal direction.
Even when a flat pulley is used as the head pulley 12, when the cover belt 21 passes through the head pulley 12, the cover belt 21 satisfactorily extends in the longitudinal direction and the difference in the radius of gyration between the base belt 19 and the cover belt 21. And the problem that the entire belt rises from the head pulley 12 does not occur.

Further, in the case of the conveyor belt 18 of the present embodiment, the cover belt 21 droops greatly by its own weight on the return side, thereby damaging the conveyor device and the conveyor belt, and transporting the sheet adhered to the surface of the base belt 19. There is no problem of dropping the rest of the object downward.

The embodiment of the present invention has been described in detail above, but this is merely an example. For example, in the present invention, a piano wire or a horizontal wire of a core material embedded in the cover belt 21 is used.
Tensile materials such as metal stranded wires and synthetic fiber cords can be used, and various rubber materials specified in JIS K-6322 can be used as the rubber material for the base belt 19 and the cover belt 21.

In the present invention, as shown in FIG. 6, two layers of the interwoven canvas 42 are laminated, one of which is provided over the entire width of the cover belt 21, and the other interwoven canvas 42 is provided. Depending on the flexibility, flexibility, and rigidity required for the cover belt 21, the cover belt 21 may be embedded with an appropriate length from the width direction end, for example, a one-third width. The present invention can be configured in variously modified forms without departing from the spirit thereof, for example, the material can be embedded as a core material in various patterns.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a conveyor device including a wrapping type conveyor belt according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a conveyor belt in FIG.

FIG. 3 is a diagram illustrating a cross-sectional configuration of a cover belt in FIG. 2;

FIG. 4 is a diagram showing the movement of the conveyor device in FIG. 1;

FIG. 5 is a view for explaining the operation of the conveyor device shown in FIG. 1 following the operation shown in FIG. 4;

FIG. 6 is a diagram illustrating a cross-sectional configuration of a cover belt according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view of a main part of a conveyor device using a conventional wrapping type conveyor belt.

[Explanation of symbols]

 12 Head Pulley 18 Conveyor Belt (Envelope Conveyor Belt) 19 Base Belt 21 Cover Belt 34 Conveyed Material 36 Upper Rubber 38 Lower Rubber 40 Intermediate Rubber 42 Blind Weave (Core) 44 Weft 46 Warp

Claims (5)

[Claims] 1. Two cover belts each having a substantially half width of the base belt are integrally joined to the upper surface of the base belt at opposite widthwise ends, and the article placed on the base belt is transferred to the cover belt. In a wrapping type conveyor belt which is conveyed by being wrapped from above with a cover belt, an elastic extension in a longitudinal direction of the cover belt is substantially equal to an elastic extension of rubber in the cover belt. A wrapping type conveyor belt for a flat pulley, wherein a flexible core material for increasing the lateral rigidity in the width direction of the belt and maintaining the cover belt in a horizontal shape on the return side is buried while maintaining the width. 2. The core wire according to claim 1, wherein the core material includes a plurality of horizontal wires arranged in a belt longitudinal direction, and the horizontal wires are linked to each other in a belt longitudinal direction before being embedded in the cover belt. And a wrapping-type conveyor belt for a flat pulley. 3. The wrapping conveyor for a flat pulley according to claim 2, wherein the weft wire and the warp wire are made of yarn, and the thickness of the weft is larger than the thickness of the warp. belt. 4. The wrapping type conveyor belt for flat pulleys according to claim 1, wherein the core material is a blind cloth. 5. The flat according to claim 2, wherein the vertical wire is maintained under elastic conditions in the longitudinal direction of the cover belt by being cut under belt use conditions. Envelope type conveyor belt for pulleys.