JPH10329915A - Fruit conveying belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fruit conveying belt having an extremely low hardness and easily adjustable impact resilience force by sticking a stress distributed gel material to the whole surface of a canvas core impregnated with a thermoplastic resin on the back face. SOLUTION: This fruit conveying belt is constituted of a canvas core 2 serving as a belt main body and a cover layer 3 made of a stress distributed gel material provided on the upper face side of the canvas core 2. Fibers having little elongation such as cotton fibers, polyester fibers, or nylon fibers are woven to form the canvas core 2, the canvas core 2 is impregnated with a thermoplastic resin, e.g., polyurethane or a polyvinyl chrolide (PVC) resin liquid 4, on the lower face side of the canvas core 2, or a coating process is applied. A plasticizer, e.g. silicone oil, paraffin oil, or naphthene oil, of 10-500 pts.wt. is absorbed in a high-oil absorbency polymer, e.g. thermoplastic polyurethane, PVC, or polyethylene, of 100 pts.wt., and it is heat-treated with a peroxide serving as a cross linking agent to obtain the stress distributed gel material of the prescribed shape for forming the upper cover layer 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a belt for conveying fruits,
More specifically, the present invention relates to a fruit transport belt that transports various fruits such as apples, persimmons, plums, and various vegetables such as tomatoes, potatoes, and cabbage without damage.

[0002]

2. Description of the Related Art Conventionally, fruits and the like are apt to be damaged even under relatively light impact, and rolling on the belt during conveyance by the belt, or falling off the belt due to the rolling, is all damage to the fruits and the like. , And cause a significant decrease in commercial value.

As a belt for conveying fruits of this type, a belt having high friction urethane or soft vinyl chloride as a cover layer, and a vertical groove, a rough top pattern as a pattern on the surface of the cover layer, or a belt with an elastomer mat attached thereto is used. , Felt, and a belt having a commercially available artificial turf adhered to the surface of a nonwoven fabric are known.

[0004]

However, since the above-mentioned belt for conveying fruits uses a cover layer made of high friction urethane or soft vinyl chloride, it has high rebound resilience and easily damages the conveyed objects. In addition, the above-mentioned fruit transport belt,
Since the cover thickness is large, the flexibility is reduced, and it is necessary to increase the minimum pulley diameter. In addition, the fruit transport belt is
Since sufficient strength cannot be expected on the belt, it is necessary to increase the thickness of the belt body in order to obtain the capacity as a conveyor belt, and the pulley diameter of the equipment used must be set large. It is not possible to cope with energy saving and resource saving.

[0005] In order to solve the above-mentioned problems, the present invention is to improve the cover material of the surface layer of the belt partly so that the rebound resilience can be easily adjusted with extremely low hardness without damaging the conveyed articles such as fruits. It is an object of the present invention to provide a fruit transport belt that can be transported.

[0006]

In order to achieve the above-mentioned object, the present invention is characterized in that a stress dispersive gel material is applied to the entire surface of a canvas core body having a back surface impregnated with a thermoplastic resin. It is a belt for conveying fruits that has been worn. The stress-dispersing gel material has a surface shape of either a flat plate or an uneven pattern, and is in principle colored.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a fruit conveying belt according to the present invention will be described in detail with reference to the drawings.
The basic structure of the fruit conveying belt 1 according to the present invention is shown in FIG.
As shown in the figure, the fabric core body 2 is a belt body, and a cover layer 3 made of a stress dispersing gel material is provided on the upper surface side of the fabric core body 2. In this type of belt, the fabric core 2 is usually one ply, but may be formed in a plurality of plies if necessary. In addition, the canvas core 2 usually has a joint in the length direction, but it goes without saying that a seamless canvas joint may be omitted. In addition, as a belt size, width is 10-500 mm and thickness is 2.0-6.
5 mm, length is in the range of 500-1000 mm.

The canvas core 2 is woven from fibers having low elongation, such as cotton fiber, polyester fiber, aromatic polyamide fiber, and nylon fiber, and a thermoplastic resin such as polyurethane, Polyvinyl chloride (PV
C) The resin liquid 4 has been impregnated or coated, and the upper cover layer 3 is directly laminated and integrated on the upper surface side of the canvas core 2 without impregnation or the like.

The stress-dispersing gel material forming the upper cover layer 3 is a main part of the present invention. This gel material is composed of 100 parts by weight of a highly oil-absorbing polymer such as thermoplastic polyurethane, PVC, polyethylene, etc. Oil, paraffin oil, or 10 to 500 parts by weight of a plasticizer such as naphthenic oil,
Thermal processing is performed using peroxide as a crosslinking agent to obtain a gel material having a predetermined shape. Then, this gel material is laminated on the surface of the above-mentioned canvas core 2, and the surface pressure is 5 to 6 kg / cm ^{2 at} 100 ° C. × 10 minutes.
Press and stick.

When this stress-dispersing gel material is used as an upper cover layer of a fruit conveying belt, it has a higher coefficient of friction, a lower hardness and a lower rebound resilience as compared with a normal thermoplastic resin, so that it does not damage the conveyed object, and The gel material absorbs energy when the object falls to the back of the belt, and the thickness of the upper cover can be reduced due to its low hardness.
A pulley of 0 mmφ can be used. The surface shape of the upper cover layer 3 is a flat plate or a concavo-convex pattern, such as a rough top or a vertical groove. The thickness of the upper cover layer is 0.5 to 5.0 mm when the surface is flat, and 2.0 when the surface is uneven.
It is desirably in the range of 5.0 mm.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a fruit conveying belt 1 according to the present invention has a belt body 5 with a one-ply cored canvas 2 with an allowable tension of 3 kg / cm ² represented by NS31UB0 / 0 (W).
On the back side of this is a resin conveyor belt impregnated with a polyurethane resin liquid 4, and on the front side of this core body canvas 2, a polyethylene-based stress-dispersing gel material provided with a rough top pattern of 4 mm in thickness as a cover layer 3. Laminated and affixed. On the other hand, the conventional belt is the same as the above-described belt 1 of the present invention except that the surface cover layer is laminated and adhered with a rough top pattern of PVC.

Using each of the above-mentioned belts, a fruit conveying belt was evaluated. First, as a static evaluation of the belt, the hardness, strong elongation, rebound resilience, coefficient of friction (to PPC paper), abrasion resistance, and adhesive strength of the cover were measured. In addition, as a dynamic evaluation of the belt, a running test was performed with a pulley diameter of 20 mmφ, and the tensile strength and adhesion retention rate after bending 2 million times and the appearance were evaluated.

The belt running test was performed at a belt speed of 150 m / min, each pulley diameter was 20 mm,
The belt tension is 2.9 KN / m.

The results of the static evaluation and the dynamic evaluation of each belt under the above conditions are as shown in Table 1 below.

[0015]

[Table 1]

As is clear from the results, the belt of the present invention has a low hardness, a low rebound resilience and a low abrasion resistance in static evaluation as compared with the conventional belt. In addition, the dynamic evaluation confirmed that the belt had excellent tensile strength, adhesion retention rate, and appearance after running at the minimum pulley diameter.

FIG. 2 is a cross-sectional view showing another embodiment of the fruit conveying belt according to the present invention, except that the surface shape of the cover layer 3 is the same as the belt shown in FIG. Is the same.

[0018]

As described above, the fruit conveying belt of the present invention has an extremely low hardness and a rebound resilience that can be easily adjusted by laminating a stress dispersing gel material as a cover layer on the surface of a canvas core. It has become possible to manufacture, and thereby, it is possible to develop a transporting application that does not damage a transported object such as a steep slope and fruits. Furthermore, variations in stress distribution gel material around 100 ° C. temperature, can respond in any surface pattern for melting can be easily, good compatibility with the colorant also the color of the further cover layer, conveyed or transported A variety of colors can be expected from the appearance that matches the equipment.

[Brief description of the drawings]

FIG. 1 is a sectional view of a fruit conveying belt according to the present invention.

FIG. 2 is a sectional view showing another embodiment of the fruit conveying belt of the present invention.

[Explanation of symbols]

 1 Fruit Conveyor Belt 2 Canvas Core 3 Upper Cover Layer 4 Resin Liquid 5 Belt Body

Claims (3)

[Claims] 1. A fruit conveying belt characterized in that a stress dispersing gel material is adhered as an upper cover layer on the entire surface of a canvas core body impregnated with a thermoplastic resin on the back surface. 2. The fruit conveying belt according to claim 1, wherein the upper cover layer has a surface shape of one of a flat plate shape and an uneven pattern. 3. The method according to claim 1, wherein the upper cover layer is colored.
Or the belt for conveying fruits described in 2 above.