JPH11124211A - Bowling pin conveying belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent swelling and sticking of the protrusion part of a back being a conveying part for a pin. SOLUTION: In a bowling pin conveying belt 1 having a protrusion part 8 for a conveyance formed on the back of a V-belt 7, protrusion part rubber is formed such that at least 0.5-5.0 pts.wt. carbon black is blended and 50-90 pts.wt. white filler is blended based on 100 pts. weight rubber. Further, rubber hardness for rubber of the protrusion part for conveyance is set to a range of 50-75 deg. JIS A and further, cog grooves with a depth of 5-10 mm are formed at intervals of a distance of 10-20 mm and a slope 10 of 30-50 deg. is formed at least on one side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt for transporting a boring pin in a boring hall and a method of manufacturing the same. More specifically, the present invention relates to an improvement in a rubber composition and a shape of a rear projection of a belt for transporting a boring pin, and The present invention relates to the provision of a belt that does not contaminate a boring pin, has good transport performance, and has a long service life.

[0002]

2. Description of the Related Art Conventionally, a boring pin has been transported in a boring field by running two V-belts having a projection for transport on the back side in parallel as shown in FIG. A bowling pin was placed on the plate and transported.

[0003] In a bowling alley, wax is applied to each lane, so wax is also attached to balls and pins. Naturally, the wax attached to the pins is projected on the back of the belt when the pins are transported. Also move to.

Further, the projection on the back surface of the belt is relatively large, and the projection on the back surface may be cracked by bending fatigue when it is wound around a small-diameter pulley. Therefore, a cog groove is provided in the projection on the rear surface so as to be easily bent, and a device is devised so that a crack is hardly generated.

[0005] The projection on the back surface of the belt has an inclined surface formed on one side, and the two inclined belts are arranged so that the inclined surfaces face each other. When the boring pin is placed on the back of the belt, the pin comes into contact with the inclined surface, and the conveyance is performed by friction between the pin and the inclined surface.

[0006]

However, if wax adheres to the rubber that forms the protrusion on the back of the belt as described above, the rubber that forms the protrusion swells and becomes tacky. There was a problem that the rubber that got on the pins and soiled them. This will increase the need to wipe off dirt on the pins for bowling alley maintenance. It has been desired to develop a belt having a projection that does not stain the pins without easily swelling even when the wax is transferred.

Further, regarding the problem of cracks, merely providing cog grooves as in the current belt is not sufficient as a measure for preventing the occurrence of cracks, and the life of the belt is longer due to the occurrence of cracks than a belt without cog grooves. Although the time is getting longer, a longer life is desired.

Further, as described above, the inclined surface is provided on the protrusion on the back surface of the belt so that the frictional force between the pin and the belt is increased. The problem has not been resolved.

Therefore, the present invention has been made in view of such a conventional problem, and swells and becomes tacky even when wax transfers from a boring pin to a projection provided on the back surface of the belt. It is another object of the present invention to provide a boring pin transport belt which has excellent transport function and has a long service life, while preventing cracks in the projections and preventing pin transport failure.

[0010]

According to the present invention, in order to achieve the above object, according to the first aspect of the present invention, a projecting portion for conveyance is provided on the back surface of a V-belt having a core wire spirally embedded in an elastomer. In the formed boring pin transport belt, the rear projections are compounded with at least 0.5 to 5.0 parts by weight of carbon black with respect to 100 parts by weight of rubber.
It is characterized by using a rubber composition containing 50 to 90 parts by weight of a white filler.

By doing so, even if the wax applied to the lane of the bowling alley adheres to the pins and the wax is transferred to the boring pin transport belt, the projections on the rear surface, which are the pin transport portions, swell. As a result, it is possible to prevent the swollen rubber from reaching the pin and soiling the pin.

According to a second aspect of the present invention, the hardness of the rubber of the transporting projection is in the range of 50 to 75 ° JIS A.
In addition to having cog grooves having a depth of 5 to 10 mm at intervals of 0 to 20 mm, a slope of 30 to 50 ° is formed on at least one side surface.

By doing so, the height of the protruding portion is made higher than that of the conventional belt, the pitch of the cog grooves is made longer,
Because the depth is made deeper, even if the hardness of the rubber that forms the projection on the back is made high to prevent swelling, the flexibility of the belt will be excellent, and it will be even more compared to conventional belts In addition, the flexibility is improved, and the problem of cracks in the cog grooves is less likely to occur.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing a cross section of a main part of a boring pin transport belt of the present invention. A boring pin transport belt 1 of the present invention is provided on a lower surface of an adhesive rubber layer 3 having a low-stretch and high-strength core wire 2 embedded in a spiral shape. V core rubber layer 4, upper core rubber layer 5 is laminated on the upper surface, and lower cloth 6
And a projection 8 integrally laminated on the back surface of the V-belt 7. As the cord 2,
Cords made of polyester, polyamide, and aramid are used.

As the adhesive rubber layer 3, various rubbers such as chloroprene rubber (CR), natural rubber (NR), acrylonitrile rubber (NR), hydrogenated nitrile rubber (H-NBR), chlorosulfonated polyethylene (CSM), etc. A rubber composition in which carbon black, silica, an antioxidant, an oil and the like are appropriately added to a simple substance or a blend thereof can be used.

As the V-core rubber layer 4, chloroprene rubber (CR), styrene-butadiene rubber (SBR), ethylene-propylene-terpolymer (EPDM), nitrile rubber (NBR), Use of a rubber composition obtained by appropriately adding various kinds of rubber such as hydrogenated nitrile rubber (H-NBR) and chlorosulfonated polyethylene (CSM) or a blend thereof to which carbon black, silica, an antioxidant, oil and the like are added. Can be. Further, short fibers oriented in the width direction of the belt may be buried in order to increase the lateral pressure resistance, or a drape canvas or a plain woven canvas may be buried.

The short fibers embedded in the V core rubber layer 4 include short fibers of about 1.0 to 5.0 mm in length made of fibers of polyamide, aramid, cotton, polyester and the like. Similarly, in the case of canvas, it is possible to embed a canvas made of polyamide, aramid, polyester, cotton, or the like.

Next, the protrusion 8 is integrally laminated on the back surface of the V-belt 7. The material used for the protrusion 8 is a feature of the first aspect of the present invention. The carbon black is at least 0.5
It is compounded in a range of 5.0 parts by weight and 50 to 90 parts by weight of a white filler.

By using mainly a white filler as the filler, it is possible to reduce stains transferred from the belt to the pins. Examples of the white filler include calcium carbonate, clay, talc, silica and the like.

When the amount of carbon black is less than 0.5 parts by weight, the effect of reinforcing the projections is insufficient, and wear and cracks of the projections are liable to occur. It is not preferable because dirt easily migrates to the pins. When the blending amount of the white filler is less than 50,
Again, the effect of reinforcing the protrusions is insufficient, and wear and cracks of the protrusions appear early, and even if the amount exceeds 90 parts by weight, the reinforcing effect does not increase so much, but rather becomes a foreign substance in the rubber. Not preferred.

By doing so, even if the wax migrates from the pin, it does not easily swell, and the pin 8 can be prevented from being stained by the swollen rubber without sticking of the projection 8.

The hardness of the rubber of the projection 8 is 50 to 75 ° J.
It is preferable to set to ISA. If the hardness is 52
If it is less than JIS A, the wax tends to swell due to migration of the wax, and if it exceeds 75 JIS A, the rubber itself becomes too hard and cracks tend to occur, which is not preferable.

The rubber material used for the projection 8 is styrene-butadiene rubber (SBR), nitrile rubber (NBR), chloroprene rubber (CR), ethylene
A simple substance of synthetic rubber or natural rubber (NR) such as propylene diene monomer (EPDM) or a blend thereof can be used. It is important not to hinder the flexibility in order to prevent the occurrence of cracks when the belt is run, and to generate as much frictional force as possible as it is easy to follow the shape of the boring pin. The use of CR is preferred.

The projection 8 is provided with a cog groove 9.
This is to improve the flexibility of the belt and prevent the back surface from cracking even when wound around a small-diameter pulley. However, the depth of the cog groove 9 is 5 to 10 mm, and the cog pitch P is 10 to 10.
The range is 20 mm. The depth D of the cog groove 9 is 5 mm
If it is less than 10 mm, cracks tend to occur due to the bending of the belt, and if it is 10 mm or more, the entire belt becomes thick, which is disadvantageous in terms of downsizing the system using this belt, which is not preferable.

The projection 8 has an inclined surface 10 on one side. This is an inclined surface for receiving the boring pin when transporting the boring pin, and the inclination angle θ is in the range of 30 to 50 °. If the angle is less than 30 °, the angle is shallow and the wedge effect between the boring pin and the boring pin is reduced, so that the frictional force is reduced and slipping is likely to occur during conveyance. If the angle θ of the inclined surface exceeds 50 °, the contact of the projection 8 with the pin during pin transfer is too low, which may cause slippage during transfer.

Next, a method for manufacturing the boring pin transport belt of the present invention will be described. A belt sleeve having a cog groove in the rear projection 8 is formed using a matrix having a cog shape in the projection 8. This belt sleeve is cut into belts one by one.
Next, an inclined surface having an accurate inclination angle is provided on one side surface of the protrusion 8 by polishing using an angled whetstone.

[0027]

Next, a comparative test was conducted using an example of the boring pin transport belt of the present invention and a comparative example. Example 1
PET was used for the core wire, and rubber having the composition shown in Table 1 was used for the adhesive rubber layer 3 and the V core rubber layer 4. Table 1 shows the projection 8 integrally laminated on the back surface of the V belt 7.
The hardness of the projection 8 is changed in the range of JIS A of 59 ° with the composition shown in the following, the pitch P of the cog grooves is set to 15.1 mm,
The depth D is 6.8 mm, and the inclination angle θ of the inclined surface 10 is 40 °.
After the boring pin was transported for 288 hours while being conveyed, the degree of contamination of the pin was observed. Table 1 shows the results.

As Comparative Example 1, the same belt was used as in Example 1 except that the rubber used for the projections 8 was changed to the compound of Comparative Example 1 shown in Table 1, and the degree of pin contamination was observed in the same manner. Table 1 shows the results.

[0029]

[Table 1]

In Examples 2 to 4 and Comparative Examples 2 and 3, the rubber compound of the protrusion 8 was all the same as that of Example 1.
The hardness is changed in the range of JIS A from 48 to 78 °, the pitch P of the cog grooves is 15.1 mm, and the depth D is 6.8 m.
m, and the inclination angle θ of the inclined surface 10 was 40 °, but the life time due to the crack and the slip between the belt and the boring pin were measured. Table 2 shows the results.

[0031]

[Table 2]

In Example 5 and Comparative Examples 4 to 5, the hardness of the protrusion 8 was 59 ° JIS A, the pitch P of the cog grooves was changed in the range of 8 to 23 mm, and the depth D of the cog grooves was 6.
Although the length was 4 mm and the inclination angle θ of the inclined surface 10 was 40 °, the life time due to cracks and the slip between the belt and the boring pin were measured. Table 3 shows the results.

[0033]

[Table 3]

In Example 6 and Comparative Examples 6 and 7, the hardness of the projection 8 was 59 ° JIS A, and the pitch P of the cog grooves 9 was
Was changed to 15.1 mm, the depth D of the cog groove 9 was changed in the range of 3 to 12 mm, and the life time due to the crack and the slip between the belt and the boring pin were measured with the inclination angle θ of the inclined surface 10 set to 40 °. Table 4 shows the results.

[0035]

[Table 4]

In Example 7 and Comparative Examples 8 and 9, the hardness of the projections was 59 ° JIS A and the pitch of the cog grooves was 1
5.1 mm, depth 6.8 mm, slope angle 2
The life time due to cracks and the slip between the belt and the boring pin were measured while changing the range of 0 to 60 °.
Table 5 shows the results.

[0037]

[Table 5]

As can be seen from the results of Tables 2 to 5, the hardness of the projection, the pitch of the cog groove, the depth, and the inclination angle of the inclined surface are shown as follows.
By setting it within the predetermined range, slip between the pin and the protrusion of the belt can be reduced, and
A belt with a long life can be obtained by preventing the occurrence of cracks in the cog grooves.

[0039]

As described above, the transport belt of the present invention is
According to claim 1, in a boring pin transport belt in which a projection for transportation is formed on the back of a V-belt in which a core wire is spirally embedded in an elastomer, the rubber forming the projection on the back is based on 100 parts by weight of rubber. It is characterized by using a rubber containing at least 0.5 to 5.0 parts by weight of carbon black and 50 to 90 parts by weight of a white filler.

By doing so, even if the wax applied to the lane of the bowling alley adheres to the pins and the wax is transferred to the boring pin transport belt, the projections on the back side, which are the pin transport portions, swell. As a result, it is possible to prevent the swollen rubber from reaching the pin and soiling the pin.

According to a second aspect of the present invention, the hardness of the rubber of the transporting projection is set in the range of 50 to 75 ° JIS A.
In addition to having cog grooves having a depth of 5 to 10 mm at intervals of 0 to 20 mm, a slope of 30 to 50 ° is formed on at least one side surface.

By doing so, the height of the projections is made higher than that of the conventional belt, the pitch of the cog grooves is made longer,
Because the depth is made deeper, even if the hardness of the rubber that forms the projection on the back is made high to prevent swelling, the flexibility of the belt will be excellent, and it will be even more compared to conventional belts In addition, the flexibility is improved, and the problem of cracks in the cog grooves is less likely to occur.

[Brief description of the drawings]

FIG. 1 is a sectional perspective view of a boring pin transport belt of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Boring pin conveyance belt 2 Core wire 3 Adhesive rubber layer 4 V core rubber layer 5 Upper core rubber layer 6 Under cloth 7 V belt part 8 Projection part 9 Cog groove 10 Inclined surface P Cog pitch D Cog groove depth θ Incline angle

[Procedure amendment]

[Submission date] December 19, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a sectional perspective view of a boring pin transport belt of the present invention.

FIG. 2 is a side view of the boring pin transport belt of the present invention.

[Description of Signs] 1 Boring pin transport belt 2 Core wire 3 Adhesive rubber layer 4 V core rubber layer 5 Upper core rubber layer 6 Lower cloth 7 V belt section 8 Projection section 9 Cog groove 10 Inclined surface P Cog pitch D Cog groove depth θ tilt angle

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI // B29K 105: 06

Claims (2)

[Claims] 1. A boring pin transport belt having a V-belt in which a core wire is spirally embedded in an elastomer and a transport projection formed on the back of the V-belt. Black is added in an amount of 0.5 to 5.0 parts by weight, and a white filler is added in an amount of 50 to 90 parts.
A boring pin conveying belt characterized by using a rubber composition mixed with parts by weight. 2. The hardness of the rubber of the transfer projection is 50 to 7
A JIS A range of 5 °, a cog groove having a depth of 5 to 10 mm at intervals of 10 to 20 mm, and a slope of 30 to 50 ° formed on at least one side surface.
The boring pin conveyor belt described.