JP2700370B2 - Manufacturing method of V-belt with ridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a V-belt, and particularly to an agricultural machine typified by a combine, a binder, a shelling machine, a harvester and the like, and a belt rear portion used for separating and conveying corn, sugarcane and the like. And a ridged belt provided with a group of ridges at a predetermined pitch.

[0002]

2. Description of the Related Art Generally applied to agricultural machines such as combine harvesters, binders, and shelling machines, a mountain-shaped projection is provided at a predetermined pitch on a belt rear portion used for separating work such as corn and sugarcane, and for carrying work. Conventional belts include the following. As shown in FIG. 7, a vulcanized V-belt 21 in which a core body 24 is embedded as a belt main body portion 22 of a crested V-belt 21 is entirely covered with rubber paste or a rubber-pasted canvas 25. Using a wrapped V-belt, buffing a rubber paste or a rubber-pasted canvas on the back, leaving the canvas behind, applying rubber glue or other adhesive thereon, and forming a mountain-shaped raised piece 23 made of unvulcanized rubber. By arranging the groups at a predetermined pitch and vulcanizing,
There is a belt body 22 and a group of mountain-shaped raised pieces 23 bonded to each other. However, like this belt, the mountain-shaped raised pieces 2 are placed on the rubber paste or the rubber glued canvas 25 on the back of the belt.
In the case where the belt 3 is provided, an important problem is the adhesive strength between the belt main body 22 and the mountain-shaped raised piece 23.

[0003] The adhesion of this belt is not vulcanization bonding of unvulcanized rubbers, but adhesion of unvulcanized rubber and vulcanized rubber. Therefore, the degree of crosslinking by vulcanization is low and the strength is not more than a certain level. However, when the belt is used as a ridged belt for the above-described use of corn, sugar cane, or the like, the ridge-shaped protruding pieces are just peeled off at the adhesive portion at the base, so that the life of the belt has been reached. Therefore, in order to increase the adhesive strength between the belt body and the mountain-shaped raised pieces, the belt body is also completely unvulcanized, and the mountain-shaped raised pieces made of unvulcanized rubber are also vulcanized and bonded. A method for manufacturing a ridged belt is also conceivable.

[0004]

However, in this method, since the rubber in the belt body 22 is not vulcanized, the position of the core wire 24 is not stable, and the core wire 24 embedded after vulcanization of the belt is not used. However, there is a disadvantage that the arrangement of the belts becomes worse as shown in FIG. 8 and the belt is overturned while running. Accordingly, the present invention provides a method of manufacturing a ridged belt in which a ridge-shaped raised piece is less likely to be detached from a belt main body, the alignment of cords is not disturbed, and the running of the belt is stable. With the goal.

[0005]

The present invention SUMMARY OF THE INVENTION is the manufacturing method of the V-belt with the mountain on the back side of the belt has a raised piece group mountain-shaped in order to accomplish the above objects, vulcanized La < Unvulcanized rubber sheet is wrapped around the surface of a wrapped V-belt
And vulcanizing after attaching a group of mountain-shaped raised pieces made of unvulcanized rubber at a predetermined pitch on the back side.

As still another example, the surface of a wrapped V-belt is coated with an unvulcanized rubber sheet and the surface is coated with an unvulcanized rubber paste or an unvulcanized rubber paste canvas.
A vulcanization is performed after attaching a mountain-shaped raised piece group made of unvulcanized rubber at a predetermined pitch on the back side, and covering an unvulcanized rubber sheet on the surface of the wrapped V-belt, and further removing the back side. After coating the surface with unvulcanized rubber paste or unvulcanized rubber glued canvas, and attaching a set of mountain-shaped ridges made of unvulcanized rubber at a predetermined pitch on the back side, A V-belt with ridges, which is coated with a vulcanized rubber paste or unvulcanized rubber-pasted canvas, and a set of mountain-shaped raised pieces made of unvulcanized rubber are attached at a predetermined pitch to the back side and then vulcanized. Is also included.

[0008]

The ridged V-belt obtained by the production method of the present invention is obtained by coating an already-vulcanized transmission V-belt with an unvulcanized rubber sheet or an unvulcanized rubber paste or an unvulcanized rubber paste canvas. Then, since unvulcanized rubber is arranged on the back side of the belt on which the mountain-shaped raised pieces are attached, cross-linking of unvulcanized rubber can be performed, and the cross-linking adhesion is strong. It will be. Then, it is possible to obtain a belt in which the peeling between the group of the mountain-shaped raised pieces and the belt body hardly occurs.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a ridged belt 1 manufactured according to the present invention.
FIG. The ridged belt 1 is composed of a V-belt-shaped belt body 2 and a rubber ridge-shaped raised piece 3. The V-belt-shaped belt body 2 has a core wire 4 and an expanded rubber layer 5 disposed on the core wire 4. At the lower part, a compressed rubber layer 6 is arranged. The belt body 2 is entirely covered with a rubber paste or a rubber-pasted canvas 7 and further covered with a rubber layer 8 over the entire surface. Except for the back side of the belt, a rubber paster or a rubber-pasted canvas 9 is covered.

Although the rubber layer 8 is exposed on the back surface of the belt body 2 in the ridged belt 1 of FIG. 1, a rubber paster or a rubber-gloved canvas 9 may be arranged on the back surface side. As the rubber used for the belt body 2, chloroprene rubber,
Examples include natural rubber, nitrile rubber, butyl rubber, butadiene rubber, and the like, but are not particularly limited. Also,
The cord 4 used is a high-strength, low-elongation cord made of polyester fiber, polyamide fiber, aromatic polyamide fiber, or the like.

The rubber paste or the rubber-pasted canvas 7 or 9 coated on the belt body 2 is excellent in abrasion resistance, for example, nylon fiber, polyester fiber, aramid fiber, inorganic fiber or the like alone or in combination. The cloth is made of a woven cloth having excellent abrasion resistance and made of a blended yarn of the above, and the canvas is subjected to rubber pasting or rubber pasting such as coating or friction. On the back surface of the belt main body 2, mountain-shaped protruding pieces 3 are provided at predetermined intervals at a predetermined inclination angle. The mountain-shaped protruding pieces 3 are made of rubber, and the shape thereof is not limited to various ones depending on the application.

In this method, a mountain-shaped protruding piece 3 is provided on the belt body 2. The mountain-shaped protruding piece 3 is formed by winding a compressed rubber layer 6 around a forming drum, winding a core wire 4 in a spiral shape, and stretching the rubber layer. 5 is cut in the form of a wound belt, and then coated with unvulcanized rubber paste or unvulcanized rubber glued canvas 7 and then vulcanized to produce a wrapped V-belt in the same manner as a conventional wrapped V-belt. The unwrapped rubber belt 8 is further coated on the wrapped V-belt as shown in FIG. 2, and unvulcanized rubber paste or unvulcanized rubber paste is applied to the peripheral surface of the belt excluding the back surface as shown in FIG. 9 is coated. Then, the mountain-shaped raised piece 3 made of unvulcanized rubber is attached to the unvulcanized rubber layer 8 on the back side of the belt, and the vulcanized belt 1 is obtained by vulcanizing again.

When the ridged belt 1 is manufactured by such a method, an extremely high joining strength of the ridge-shaped raised pieces 3 to the belt body 2 can be obtained. In the manufacturing process, an unvulcanized rubber layer 8 is arranged on the outer periphery of the belt main body 2, and the mountain-shaped raised pieces 3 made of unvulcanized rubber are brought into close contact with the unvulcanized rubber layer 8 and vulcanized. This is because the rubber layer 8 provided on the outer peripheral side of the belt main body 2 and the mountain-shaped raised pieces 3 are cross-linked with a sufficient degree of cross-linking, and are almost integrated.

In this embodiment, the belt body 2 is formed by coating a vulcanized wrapped V-belt with an unvulcanized rubber layer 8 and applying an unvulcanized rubber paste or an unvulcanized rubber paste canvas 9 to the belt excluding the back surface of the belt. However, the present invention is not limited to this example, and the vulcanized wrapped V-belt is entirely covered with only the unvulcanized rubber layer 8 as shown in FIGS. 4, 5, and 6. Or, only the unvulcanized rubber paste or unvulcanized rubber glued canvas 9 is coated, or the unvulcanized rubber layer 8 is entirely covered and the unvulcanized rubber paste or unvulcanized rubber glued canvas 9 is also covered. In the present invention, the interface between the belt body 2 and the ridge-shaped raised pieces 3 is also included in the present invention because the unvulcanized rubber is bonded in the manufacturing process, and the bonding strength is increased.

Here, a belt body 2 of a conventional ridged belt and a ridged belt 1 obtained by the manufacturing method of the present invention.
And the static adhesive force between the mountain-shaped raised pieces 3 were compared. As a conventional belt as a comparative example, a ridged belt bonded by re-vulcanizing a raised piece to a vulcanized wrapped V-belt as shown in FIG. 7 was used. 1 further covers an unvulcanized rubber layer 8 on a vulcanized wrapped V-belt as shown in FIG. 1 and also applies an unvulcanized rubber paste or unvulcanized rubber paste canvas 9 on the peripheral surface of the belt except the back surface. Cover. Then, a mountain-shaped raised piece 3 made of unvulcanized rubber was attached to the unvulcanized rubber layer 8 on the back side of the belt, and the ridged belt 1 obtained by vulcanizing again was used. Further, the measuring method is such that the tip of the mountain-shaped protruding piece 3 and the belt main body 2 are separately grasped, and the angle between the belt main body 2 and the mountain-shaped protruding piece 3 is set to an acute angle in the direction of the pulling speed 50.
The belt is pulled at a rate of mm / min until the mountain belt is cut.

As a result, the conventional belt had an adhesive force at the time of peeling between the belt main body and the mountain-shaped raised piece of 50 kg, whereas the belt obtained by the manufacturing method of the present invention had the belt main body and the mountain-shaped raised piece. 140kg adhesive force between the strips
Met. This indicates that the adhesive force at the interface between the belt main body 2 of the ridged belt 1 and the mountain-shaped raised piece 3 obtained by the manufacturing method of the present invention is strong. Further, a dynamic adhesion evaluation test was performed to compare the adhesive strength of the interface between the belt body 2 of the conventional belt and the belt body 2 of the belt 1 obtained by the manufacturing method of the present invention and the mountain-shaped raised piece 3. went.

A ridged belt is hung between a driving pulley and a driven pulley, a rubber plate is arranged as a resistor in a belt rotation contact area, and the belt is run to repeatedly contact the resistor with a mountain-shaped ridge. The time until one of the groups separated from the belt body was measured.

However, the belt body of the ridged belt is a standard A-39 inch (manufactured by Mitsuboshi Belting Co., Ltd.) of a wrapped V-belt, and the pitch interval P of the ridge-shaped raised pieces is 95 m.
m, the shape of the mountain-shaped raised piece has a length L = 83 mm and an angle α =
The vulcanized wrapped V-belt as shown in FIG. 1 is further coated with an unvulcanized rubber layer 8 and has an unvulcanized rubber on the peripheral surface of the belt excluding the back surface as shown in FIG. The canvas 9 is pasted or unvulcanized rubber. Then, a mountain-shaped ridge 3 made of unvulcanized rubber is attached to an unvulcanized rubber layer 8 on the back side of the belt, and the ridged belt 1 obtained by vulcanizing again is used. Using a ridged belt bonded by re-vulcanizing the raised pieces to a vulcanized wrapped V-belt as shown in 7,
The pulley is JIS-A type and the outer diameter of the drive pulley is φ160.
mm, the outer diameter of the driven pulley is φ60mm, and the rotation speed is 240r
A running test was performed under the conditions of pm and a shaft load W = 20 kgf. The results of this experiment are shown in Table 1.

[0019]

[Table 1]

From the experimental results shown in Table 1, the adhesive strength at the interface between the belt body 2 of the ridged belt 1 and the ridged ridge 3 obtained by the manufacturing method of the present invention is about five times that of the conventional one. It is very good, up to 7 times.

[0021]

According to the present invention, there is provided a method for manufacturing a ridged V-belt having a group of ridge-shaped ridges on the back side of the belt as described above, wherein an unvulcanized rubber sheet is coated on the surface of the wrapped V-belt, The vulcanization is performed after attaching a mountain-shaped raised piece group made of unvulcanized rubber at a predetermined pitch on the back side, and as another example, the surface of a wrapped V belt is coated with an unvulcanized rubber sheet and Unvulcanized rubber paste or unvulcanized rubber glued canvas is coated on the surface, and a mountain-shaped raised piece of unvulcanized rubber is attached on the back side at a predetermined pitch, and then vulcanized, and wrapped V The surface of the belt is coated with an unvulcanized rubber sheet, and the surface excluding the back side is coated with unvulcanized rubber paste or unvulcanized rubber paste canvas, and the back side is made of unvulcanized rubber at a predetermined pitch. After attaching the mountain-shaped ridges, wrap again Unvulcanized rubber paste or unvulcanized rubber glued canvas is coated on the surface of the V-belt, and vulcanization is performed after attaching a group of mountain-shaped raised pieces made of unvulcanized rubber at a predetermined pitch on the back side. In the manufacturing process, the unvulcanized rubber comes into contact with the unvulcanized rubber and is vulcanized and adhered to the belt main body and the mountain-shaped raised pieces, so that an extremely strong adhesive force can be obtained by crosslinking at the interface. Therefore, it is possible to obtain a ridged belt in which the ridge-shaped protruding pieces do not separate from the belt main body even when used for a high-load application.

Also, the portion of the belt body in which the core is buried uses a wrapped V-belt that has already been vulcanized before the mountain-shaped protruding piece is attached. Can be obtained without any disorder in the arrangement of the belts.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a ridged belt obtained by a manufacturing method of the present invention.

FIG. 2 is a perspective view of a main part showing steps of a manufacturing method of the present invention.

FIG. 3 is a main part perspective view showing another step of the manufacturing method of the present invention.

FIG. 4 is a perspective view of a main part of another ridged belt obtained by the manufacturing method of the present invention.

FIG. 5 is a perspective view of a main part of still another ridged belt obtained by the manufacturing method of the present invention.

FIG. 6 is a perspective view of an essential part of still another ridged belt obtained by the manufacturing method of the present invention.

FIG. 7 is a perspective view of a main part of a conventional ridged belt.

FIG. 8 is a perspective view of a main part of a conventional ridged belt showing a state in which the cords are disturbed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Belted belt 2 Belt main body 3 Mountain-shaped raised piece 4 Core wire 5 Extension rubber layer 6 Compressed rubber layer 7 Rubber paste or rubber paste canvas 8 Rubber layer 9 Rubber paste or rubber paste

Claims (4)

(57) [Claims] 1. A V method of manufacturing a V-belt with mountain having raised piece group mountain-shaped on the back side of the belt wrapped around the unvulcanized rubber sheet on the surface of the vulcanized wrap <br/> de V belt And vulcanizing after attaching a group of mountain-shaped raised pieces made of unvulcanized rubber at a predetermined pitch on the back side. 2. A method for producing a mountain with a V-belt having raised piece group mountain-shaped on the back side of the V-belt, wrapped around the unvulcanized rubber sheet on the surface of the vulcanized wrap <br/> de V belt the <br/> overturned Te, further unvulcanized rubber cement pulling or unvulcanized rubber glued fabric coated on its surface was attached to the mountain-shaped raised piece group consisting of unvulcanized rubber at a predetermined pitch on the back side A method for producing a crested V-belt, comprising vulcanizing later. 3. A manufacturing method of a mountain with a V-belt having raised piece group mountain-shaped on the back side of the V-belt, wrapped around the unvulcanized rubber sheet on the surface of the vulcanized wrap <br/> de V belt And a non-vulcanized rubber paste or unvulcanized rubber-pasted canvas is coated on the surface except for the back side, and a mountain-shaped raised piece group made of unvulcanized rubber at a predetermined pitch on the back side. And vulcanizing after mounting. 4. A method of manufacturing a ridged V-belt having a group of ridged ridges on the back side of the V-belt, wherein the vulcanized wrapped V-belt has an unvulcanized rubber paste or an unvulcanized rubber paste on a surface thereof. A method of manufacturing a V-belt with ridges, comprising winding and covering a vulcanized rubber glued canvas, mounting a set of mountain-shaped raised pieces of unvulcanized rubber at a predetermined pitch on the back side, and then vulcanizing.