JPH1035845A - Carrying belt with v-guide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of meandering of belt by providing the specified number of guides having a V-shaped cross section along the longitudinal direction in a lower surface of a belt main body, and forming the guide into the specified number of layered structures so that both side surfaces of the guide are formed at a high degree of hardness and that residual parts thereof are formed at a low degree of hardness. SOLUTION: A belt main body 2 of a carrying belt 1 with V-shaped guide is made of the fiber at a small degree of elongation, and formed of a layered body, which is formed by coating both surfaces of one surface of a core canvas 3 with a cover layer 4. At least one guide part 5 having a V-shaped cross section is provided at a central part of a lower surface of the belt main body 2 along the longitudinal direction of the belt over the full length of the belt. At this stage, cross section of the guide part 5 is formed with the double-layer structure. Namely, both side surface parts 6, 6, which contact with a pulley P having a guide groove to be engaged with the V-shaped guide part, are formed at a high degree of hardness, and residual parts 7 except for both the side surfaces of the guide is formed at a low degree of hardness. With this structure, generation of meandering of the belt can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveying belt with a V guide, and more particularly to a conveying belt with a V guide which can travel without meandering when the conveying belt with a V guide is used in an automatic machine equipped with a small pulley. About the belt.

[0002]

2. Description of the Related Art FIG.
As shown in the figure, a guide portion 15 of, for example, V-shape, square, rectangle, semicircle, etc. is attached to the lower surface of the conveyor belt main body 2 and guided through a pulley having a guide groove fitted with the guide portion, and the belt 20 is guided. Although it is known to prevent meandering, this structure increases the bending diameter on the pulley,
In addition, the guide portion is damaged early due to the bending compression, and it is necessary to replace only this portion at an early stage, and therefore, there is a disadvantage that the entire transport device must be stopped.

In addition, when a V-guided conveyor belt 20 of this type is used in an automatic machine equipped with a small pulley recently, the bending radius on the small pulley becomes small when the shape of the guide portion 15 is V-shaped. For this reason, the V guide portion is compressed and the side surface swells as shown by the dotted line, making it difficult to fit in the V groove of the pulley, or the compression deformation of the V-shaped guide portion causes the upper surface to fall as shown by the dotted line, so that the belt body There is a problem that separation between the V guide portion and the V guide portion easily occurs. (FIG. 5) When the guide shape is a square or a rectangle, this phenomenon tends to appear more remarkably.

In order to compensate for these drawbacks, various studies have been made on the hardness of the V-shaped guide. However, when the V-guide is made to have a high hardness (85 ° to 95 ° in JIS-A), the wear resistance is good, but the compressive stress is low. When it becomes high and the flexibility is reduced, or when it comes into contact with the guide groove of the small pulley, squeal (slip noise) is generated, which is not suitable for the small pulley. On the other hand, when the V guide has a low hardness (40 ° to 70 ° in JIS-A), the compressive stress is reduced, the flexibility is improved, and the V guide is adapted to a small pulley.
Poor wear resistance and short life.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention partially prevents the belt from meandering by partially improving the sectional structure of a V-shaped guide portion used on the lower surface of the belt body. Further, it is an object of the present invention to provide a V-guided conveyance belt with excellent wear resistance, in which the flexibility of the belt when a small pulley is used is greatly improved and the squeal of the belt is eliminated.

[0006]

In order to achieve the above-mentioned object, the present invention is characterized in that at least one guide having a V-shaped cross section is provided on the lower surface of the belt body along the longitudinal direction, and both side surfaces of the guide are provided. Has a two-layer structure of high hardness and low hardness on the remaining portions other than the both side portions. And the hardness is JI
The SA has a range of 85 ° to 95 ° and the low hardness is in a range of 40 ° to 70 °, and a predetermined amount of wax is mixed into both side surfaces of the V-shaped guide.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of a transport belt with a V guide according to the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a transport belt 1 with a V guide according to the present invention, in which the pulley diameter is 20.
FIG. 4 is a cross-sectional view showing a state in which the belt body 2 is engaged with a small pulley P having a diameter of not more than mmφ. The core fabric 3 is formed of a laminated body in which both sides or one surface of the core fabric 3 are covered with a core body fabric layer 3 impregnated or coated and a cover layer 4 made of thermoplastic polyurethane, PVC or the like. At the center of the lower surface of the belt main body 2, a guide portion 5 having a V-shaped cross section is provided along the entire length of the belt along the longitudinal direction of the belt.

The V-shaped guide part 5 is a main part of the present invention, and the cross section of the guide part 5 has a two-layer structure as shown in FIG. That is, the hardness of the guide side surfaces 6, 6 in contact with the pulley having the guide groove engaged with the V-shaped guide portion is high (85 ° to 95 ° in JIS-A), and the remaining portion 7 other than the guide side surfaces is provided. Has low hardness (40 ° in JIS-A)
７０70 °). In addition, a wax of 0.1 to 0.3% by weight is mixed into both side portions of the guide if necessary, and the guide width W3 is set in a range of 1 to 2 mm. The material of the guide portion 5 is formed of the same thermoplastic polyurethane or PVC as the cover layer 4.

Here, the hardness of the guide side surfaces 6, 6 is 8
If it is less than 5 °, the width W
3 is required to be 2 mm or more, so that the compressive stress becomes too high and the bending resistance is deteriorated, so that it cannot be used for a small pulley.
On the other hand, if the hardness is 95 ° or more, the compressive stress becomes too high, and the bending resistance deteriorates, so that it cannot be used for a small pulley. Further, if the hardness of the guide residual portion 7 is 40 ° or less, the wear resistance is poor, while if the hardness is 70 ° or more, there is a problem that the bending resistance is reduced and it does not fit into the small pulley.

The size of the guide portion 5 is the same as that of the belt body 2.
The belt width is usually 1000 mm
If the width is less than 10 mm, the guide upper width W1 is 10 mm and the guide bottom width W2.
Is most preferably 7.8 mm, and the width W3 of the high hardness portion is most preferably 1-2 mm, but is not necessarily limited to this value.

FIG. 3 shows another embodiment in the case where the width of the belt body is wide.
In the case of 000 mm or more, V guides 5 and 5 are provided at both sites of the belt main body 2 to prevent the belt from meandering and to prevent wrinkles in the width direction.

[0012]

Next, specific examples showing the effects of the present invention will be described. 0.2% by weight of wax is mixed into both sides of the V-shaped guide described with reference to FIG.
FIG. 5 shows the performance comparison between the V-guided conveyor belt 1 according to the present invention in which the width of the side portion is 1.0 mm and the hardness of the remaining portion is 60 °, and the conventional V-guided conveyor belt 20 shown in FIG. 4, a tail pulley 8 having a pulley diameter of 20 mmφ, a drive pulley 9, a take-up pulley 10, and the like.
Hanging on an axis bending tester, belt speed 150m / mi
n, a belt tension was 5 kgf / cm, and a running test was performed under the test conditions of an ambient temperature and a room temperature, and the performance of each belt was compared. Table 1 shows the results.

[0013]

[Table 1]

As is apparent from Table 1, the conveying belt according to the present invention shows about 1.5 to 20 times the number of times of bending in a running test with a small pulley diameter as compared with the conventional belt, and also shows that the wear on the side surface of the guide is reduced. It was found that the belt performance was greatly improved without peeling or deformation of the V-shaped guide.

[0015]

As described above, the transport belt with a V-guide according to the present invention is characterized in that the structure of the V-shaped guide provided on the lower surface of the belt body according to the first aspect has high hardness on both side portions and low hardness on the remaining portions other than the both side portions. By adopting the two-layer structure, the belt can be prevented from meandering, as well as the flexibility and wear resistance of the small pulley can be greatly improved, and there is no deviation from the pulley. In addition, the upper surface of the V guide does not drop due to the compression deformation, and no excessive force acts on the adhesive surface between the belt body and the V guide, so that the durability of the belt can be greatly improved. In addition, the squeal generated when the guide groove of the small pulley contacts the guide groove of the small pulley can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a transport belt with a V guide according to the present invention.

FIG. 2 is an enlarged sectional view of a V guide.

FIG. 3 is a cross-sectional view showing another embodiment according to the present invention.

FIG. 4 is a schematic front view of a bending test apparatus.

FIG. 5 is a cross sectional view of a conventional V-guided conveyance belt.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor belt with V guide 2 Conveyor belt main body 5 V-shaped guide 6 Guide both sides 7 Residual guide

Claims (3)

[Claims] At least one guide having a V-shaped cross section is provided along the longitudinal direction on the lower surface of the belt body, and both sides of the guide have a high hardness, and the remaining portions other than the both sides have a low hardness two-layer structure. A conveying belt with a V guide. 2. The high hardness of both side portions of the guide is JIS-compliant.
The conveying belt with a V guide according to claim 1, wherein the low hardness of A is 85 ° to 95 ° and the low hardness of the remaining portion other than both side portions is 40 ° to 70 ° in JIS-A. 3. The conveyor belt with a V guide according to claim 1, wherein a predetermined amount of wax is mixed into both side surfaces of the guide.