JPH04351350A - Coupling v-belt for power transmission and its manufacture - Google Patents

Abstract

PURPOSE:To increase the bonding strength of V-belt bodies. CONSTITUTION:A composite V-belt 1 for power transmission includes a plurality of V-belt bodies 2 put in an in-line arrangement. A strip-shaped tie band 3 is placed on these V-belt bodies 2. The peripheries of these V-belt bodies 2 and the tie band 3 are covered with a sheath canvas 4. The bonding strength of the V-belt bodies 2 is increased by this covering with sheath canvas.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupled V-belt for power transmission and a method for manufacturing the same.

0002

[Prior Art] Conventionally, a so-called tie band section made of canvas (elastic canvas with rubber) is placed on top of a plurality of V-belt bodies arranged in parallel, and the canvas and V-belt bodies are tied together at the same time. So-called bonded V-belts in which V-belt bodies are bonded together by vulcanization are known (see, for example, Japanese Patent Application Laid-Open No. 57-56619 and Japanese Utility Model Publication No. 58-22429). It is also known that instead of canvas, a tie band section using sudarecord is used to connect the parts.
For example, see Utility Model Application Publication No. 55-45082)

0003
]

However, in such a combined V-belt, the V-belt main bodies are connected only at the upper surface of the plurality of V-belt main bodies.
There is a problem in that the bonding strength between the V-belt main body and the tie band, which is canvas or sudarecord, is weak, and the V-belt main body and tie band become separated during use.

The present invention provides a combined V-belt for power transmission that prevents separation of the V-belt main body and tie band portion during use of the belt, and a method for manufacturing the same.

[0005]

[Means for Solving the Problems] The invention of claim 1 includes a plurality of V-belt main bodies arranged in parallel and a belt-shaped tie band part placed on the V-belt main bodies. The plurality of V-belt main body parts and tie band parts are configured such that their outer peripheries are covered with an outer covering canvas and are connected and integrated.

[0006] The invention according to claim 2 has a plurality of V-belt body parts arranged in parallel, and the outer periphery of the plurality of V-belt body parts is covered with at least two or more layers of outer covering canvas. The structure is such that they are connected and integrated.

[0007] The invention according to claim 3 is a power transmission device in which a band-shaped tie band portion is placed on a plurality of V-belt main body portions arranged in parallel, and the outer periphery of the tie band portion is covered with an outer covering canvas. A method for manufacturing a combined V-belt, wherein an outer covering canvas is mounted on the V-grooves of a lower press mold having a plurality of V-grooves corresponding to the V-belt main body, leaving a surplus portion, and the outer covering is Load the V-belt main body into each V-groove through the canvas,
Further, a band-shaped tie band section is placed on top of the plurality of V-belt main bodies, and then the upper side of the tie band is covered with the excess portion of the outer covering canvas, and the outer side of the V-belt main body section and tie band section is The entire periphery is covered with an outer covering canvas, and after being covered with the outer covering canvas, a press upper mold is applied and press vulcanization is performed so as to connect and integrate.

[0008]

According to the first aspect of the invention, the entire outer periphery of the plurality of V-belt main body parts and tie band parts is covered with the outer covering canvas, and separation thereof during use is suppressed.

According to the second aspect of the invention, the entire outer periphery of the plurality of V-belt main body parts is covered with the outer covering canvas, and separation of the main body parts during use is suppressed.

According to the third aspect of the invention, such a combined V-belt for power transmission can be easily manufactured.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1 showing the overall configuration, reference numeral 1 denotes a coupled V-belt for power transmission, which has a width approximately corresponding to the entire width of the V-belt body parts 2, 2, 2 arranged in parallel on a plurality of V-belt body parts 2, 2, 2. A wrap in which a tie band part 3 having a rectangular cross section made only of rubber is placed, the entire outer periphery of the tie band part 3 is covered with a single outer covering canvas 4, and the outer covering canvas 4 is joined at a joint part 4a. It is typed and integrally vulcanized. Reference numeral 5 denotes a core cord embedded in each V-belt body 2 in a spiral manner.

With the above structure, the entire outer periphery of the V-belt main body parts 2, 2, 2 and tie band part 3 are covered and integrally connected by the outer covering canvas 4.
The V-belt main body part 2 and the tie band part 3 are firmly connected and are prevented from separating during use of the belt.

Next, a description will be given of tests conducted on the above power transmission coupling belt.

[0015] An example of the present invention having a circumferential length of 600 mm formed by connecting three V-belt body parts with a tie band part (see Fig. 1), and a conventional example belt whose periphery is not covered with outer canvas. Manufactured.

[0016] When a static evaluation was performed to compare the bonding strength (peel strength) of the tie band portion, it was found that when the strength of the conventional example was taken as 100 (index), the strength of the example of the present invention was 2.
40, which was approximately 2.5 times as strong.

Dynamic evaluation was also conducted using the test apparatus 6 shown in FIG. That is, the rotation speed is 180 with a diameter of 85 mm.
Output 6 ps with 0 rpm drive pulley 7 and diameter 85 mm
Wrap the test belt 9 between the driven roller 8 and the time until the tie band part peels off (separation) (belt life)
was measured. Note that the pulley groove pitch was 11.3 mm (standard is 10.3 mm).

As a result, when the belt life of the conventional example was taken as 100 (index), the belt life of the example of the present invention was 210, which is more than twice as long. Therefore, it was confirmed that the bonding force due to the tie band portion was increased both statically and dynamically.

Next, a method for manufacturing the power transmission coupling belt will be explained.

First, as shown in FIG. 3, the press lower die 11 has a plurality of V grooves 11a, 11a, 11a corresponding to the V belt main body 2.
The outer covering canvas 4 is attached to the outer cover canvas 4. At this time, the outer canvas 4 is attached to the groove surface of the V-groove portion 11a using, for example, a sewing machine roll or the like.
be completely aligned so that there are no gaps, and leave a sufficient amount of excess portion 4A.

Then, as shown in FIG.
Load the belt main body parts 2, 2, 2. Then, the belt-shaped tie band portion 3 is placed on the plurality of V-belt main body portions 2, 2, 2.

Then, as shown in FIG. 5, the upper side of the tie band portion 3 is covered with the excess portion 4A of the outer covering canvas 4, and thereby the outer covering canvas 4 is used to cover the V-belt main body portions 2, 2. , 2 and the entire outer periphery of the tie band portion 3. After covering with the outer covering canvas 4, a press upper mold 12 is applied, and press vulcanization is performed by pressure heating so that the V-belt main body parts 2, 2, 2, tie band parts 3, and outer covering canvas 4 are integrally molded. do.

[0023] In this way, the power transmission coupling belt 1 is manufactured.

In the above embodiment, the V-belt main body portions 2, 2,
2 and the tie band part 3 are covered with an outer covering canvas 4, but as shown in FIG. 6, the tie band part is omitted,
The outer periphery of the plurality of V-belt main bodies 21, 21, 21 is covered with at least two or more layers of outer covering canvas 22, 23, and the combined V-belt 24 for transmitting other power is similarly sufficiently formed. A strong bond strength can be obtained.

[0025]

According to the invention of claim 1, since the entire outer periphery of the plurality of V-belt main body parts and the tie band part is covered with the outer covering canvas, the V-belt main body part The strength of the bond between the tie band portion and the tie band portion is greatly increased, and their separation during use is suppressed.

According to the second aspect of the invention, since the entire outer periphery of the plurality of V-belt main bodies is covered with the outer covering canvas, the V-belt main bodies can be bonded with high bonding strength without using tie bands. They can be combined with each other and their separation during use is suppressed.

[0027] According to the third aspect of the invention, such a coupled V-belt for power transmission with high coupling strength of the V-belt main body portion can be easily produced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a coupled V-belt for power transmission.

FIG. 2 is an explanatory diagram of a test device.

FIG. 3 is an explanatory diagram of the first step of the method for manufacturing a coupled V-belt for power transmission.

FIG. 4 is an explanatory diagram of the second stage of the method for manufacturing a coupled V-belt for power transmission.

FIG. 5 is an explanatory diagram of the third stage of the method for manufacturing a coupled V-belt for power transmission.

FIG. 6 is a sectional view of a combined V-belt for power transmission according to another embodiment.

[Explanation of symbols]

1, 24 Combined V-belt for power transmission 2, 21
V-belt main body part 3 Tie band parts 4, 22, 23 Outer covering canvas 11 Press lower die 11a V groove part 12 Press upper die

Claims (3)

[Claims] 1. A plurality of V-belt main bodies arranged in parallel and a band-shaped tie band placed on the V-belt main bodies, the plurality of V-belt main bodies and the tie band being arranged in parallel. A power transmission coupling V characterized in that the outer peripheries of the parts are covered with an outer covering canvas and are connected and integrated.
belt. 2. A plurality of V-belt main bodies arranged in parallel, the outer circumferences of the plurality of V-belt main bodies being covered with at least two or more layers of outer covering canvas, and connected and integrated. A coupled V-belt for power transmission, characterized by: 3. Manufacture of a combined V-belt for power transmission in which a band-shaped tie band portion is placed on a plurality of V-belt main body portions arranged in parallel, and the outer periphery of the tie band portion is covered with an outer covering canvas. In this method, an outer covering canvas is mounted on the V-groove portion of a lower press mold having a plurality of V-grooves corresponding to the V-belt main body portion, leaving a surplus portion, and each Loading the V-belt body into the V-groove, further placing a belt-shaped tie band on top of the plurality of V-belt bodies,
Then, the upper side of the tie band is covered with the excess portion of the outer covering canvas, and the entire outer periphery of the V-belt main body and the tie band portion is covered with the outer covering canvas, and after being covered with the outer covering canvas, the upper mold is pressed. A method for manufacturing a combined V-belt for power transmission, characterized by applying the above and press-vulcanizing it so that it is connected and integrated.