JPH0735148Y2 - High load transmission belt - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a block belt, and the method of fixing the block to the center belt is to use a fastening material made of a wire rod for fixing the block without forming a through hole in the center belt. Involved in

[Prior art]

Conventionally, there has been a high load transmission belt in which a block is fixed to a center belt, in which through holes are formed in each of the block and the center belt and fixed by bolts or rivets. Such belts are reliable in terms of fixed strength and were suitable for use in high load transmission applications.

However, in this structure, it is indispensable to make a hole in the center belt, which cuts the core wire in the center belt, so that the strength of the center belt cannot be reduced. There wasn't. In addition, this belt, which has many steps in the manufacturing process such as drilling holes and tightening bolts and rivets, is disadvantageous in terms of cost.

Therefore, the applicant of the present invention has proposed a belt having a structure in which the block is firmly fixed without making a hole in the center belt and the productivity is high. (Japanese Patent Application No. 1-26
1138)

This belt has a structure as shown in FIG. 7, in which grooves 35a and 36a are provided on the periphery, and upper and lower blocks 35 and 36 are used. This structure is used for fastening by fastening with a material 37. In this structure, it is not necessary to make a hole in the center belt 34. If the fastening material 37 is preliminarily shaped in a U shape, the upper and lower blocks 35, 36 It can be fixed simply by inserting it in the
It can be said that the strength of No. 4 does not decrease and the productivity is excellent.

[0006]

However, as described above, a groove is provided around the block to fasten the fastening material to fix the block and the center belt. side of the block in contact with a pulley when used in wound around the pulley is smaller than the conventional belt.

It is important for the belt to transmit power in terms of good transmission efficiency and long life. If the side surface of the block forming the side surface of the belt that contacts the pulley is small, the transmission efficiency becomes small. However, the wear resistance is deteriorated and the life is shortened.

Further, since the block thickness is small, the block rigidity may be insufficient, which is also related to the problems of transmission efficiency and life.

In view of the above problems, the present invention can firmly fix the block and the center belt without making a hole in the block, which is excellent in productivity and the side of the block. An object of the present invention is to provide a high load transmission belt which is excellent in transmission efficiency and life without reducing the area.

[0010]

In order to achieve such an object, the present invention embeds a core wire having a low elongation and a high strength in an elastomer in a spiral shape and has a ridge or a recess at a predetermined pitch on at least one surface. In a high load transmission belt in which blocks are fitted and fixed to the convex stripes or the concaves of the center belt on both upper and lower surfaces of the center belt, a fastening material made of a wire is used as either the upper or lower block. The projecting block is used, and the center belt arranged between the upper and lower blocks is fixed by caulking the other block with a fastening material projecting from the block.

[0011]

In the high load transmission belt of the present invention, a part of the fastening material made of wire is embedded in one block, and the center belt is sandwiched between both blocks and between the fastening materials protruding from the one block. Since the other block is caulked and fixed at the end of the fastening material, the fixing strength of the center belt and the block can be mechanically firmly fixed by the fastening material, and or become a center belt easy to be cracked because it is not even to open a hole, buried in the center belts when opening a hole
There is no concern arises by cutting a core wire that is. Further, since the belt side surface does not have a groove on the contact surface with the pulley, the rigidity is strong, and the side surface area is not narrowed, the life is long and the transmission efficiency is excellent.

Further, in terms of productivity, a part of the fastening material is embedded in the upper or lower block in advance, and fixing can be easily performed by bending and crimping the end portion of the fastening material.

【Example】

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention. A high load transmission belt 1 of the present invention is provided with a high load on both upper and lower surfaces of a center belt 4 having a core wire 3 embedded in an elastomer 2. The belt is provided with upper and lower blocks 5 and 6 for transmission to enhance rigidity and lateral pressure resistance.

As the elastomer 2, NR (natural rubber), SBR (styrene / butadiene rubber), CR (chloroprene rubber), NBR (nitrile rubber), hypalon (chlorosulfonated polyethylene), HNBR ( A hydrogen compound such as hydrogenated nitrile rubber) or a rubber compound composed of a blended material of these materials or a polyurethane resin.

The core wire 3 embedded in the center belt 4 is made of glass fiber, aramid fiber, polyamide fiber,
A rope tension member having low elongation and high strength made of polyester fiber, metal wire or the like is used.

The upper and lower blocks 5 and 6 have greater rigidity than the center belt, specifically, hard rubber having a hardness of 90 ° or more, hard urethane resin, liquid crystal resin, phenol resin, epoxy resin, polyamide resin, polyester resin, It is made of a resin such as an acrylic resin or a methacrylic resin, or a reinforced resin obtained by mixing a fiber group such as cotton thread, chemical fiber, glass fiber or metal fiber into these resin materials .

Next, when arranging the upper and lower blocks 5 and 6 on both sides of the center belt 4, the contact surfaces of the center belt 4 and the upper and lower blocks 5 and 6, that is, both sides of the center belt 4, are arranged. The ridges 4a and 4b extending in the belt width direction, respectively, and the contact surfaces of the blocks 5 and 6 with the center belt 4 are provided with concave grooves 5a and 6a which are closely fitted to the ridges 4a and 4b. The upper and lower blocks 5, 6 and the center belt 4 are formed so as not to be displaced in the belt longitudinal direction. In this structure, the ridges and the recesses may be reversed, and even if the ridges are provided on the block side and the recesses are provided on the center belt 4 side, they are fitted together.
The positional displacement between the lower blocks 5 and 6 and the center belt 4 can be regulated. Further, even if such a concavo-convex fitting structure is provided on only one of the upper and lower blocks, there is no inconvenience in implementing the present invention.

The lower block 6 of the upper and lower blocks 5 and 6 is constructed so that a part of the fastening material 7 formed of a substantially U-shaped metal wire member is embedded in advance when the blocks are molded, as shown in FIG. It is made and the recess 6 of the lower block 6
Two fastening materials 7 are projected from the vicinity of the end of a.

On the other hand, as shown in FIG. 3, the upper block 5 has a through hole 5b through which the fastening material 7 protruding from the lower block 6 passes.
And a groove 5c into which the end portion 7a of the fastening material is fitted when the end portion 7a of the fastening material is bent and crimped.

The high load transmission belt 1 of the present invention comprises the above-mentioned components, and the center belt 4 is arranged between the two fastening members 7 protruding from the lower block 6 as shown in FIG. From the top, the upper block 5 is fastened with the fastening material 7 through the through hole 5b.
The end portion 7a of the fastening material is bent and crimped, and the crimped portion is fitted into the groove 5c of the upper block 5, so that the center belt 4 and the upper and lower blocks 5,
Fixing with 6 is completed.

The high-load transmission belt 1 of the present invention has such a structure, so that the fastening material 7 is partially embedded in the lower block 6 in advance, and only the upper block 5 is bent and crimped. So the assembly work of the belt is very easy and the productivity is good.
Since the fixing to the lower blocks 5 and 6 is mechanical by the fastening material 7, it has excellent fixing strength and can be fixed without making a hole in the center belt 4, so that the center belt 4 is cracked or has a hole. The core wire 3 is not cut off when it is opened. Further, since the belt side surface does not have a groove on the contact surface with the pulley, the rigidity is strong, and the side surface area is not narrowed, the life is long and the transmission efficiency is excellent.

FIG. 5 shows another embodiment of the high load transmission belt of the present invention. In this high load transmission belt 11, the fastening material 17 is partially embedded in the lower block 16, but the fastening block 17 is It appears from the bottom to the surface. The upper block 15 is provided with a groove 18 on the side surface of the block for fixing the fastening material 17 by winding and fastening. Further, a center belt fitting groove 19 is formed in the block 16 so that the center belt 14 is fitted therein to prevent the center belt 14 and the upper and lower blocks 15 and 16 from being displaced in the belt width direction.

In the case of such a structure, since the upper block 15 is provided with the groove 18, the side area of the belt is smaller than that in the previous embodiment, but at least the side surface of the lower block 16 has no groove. Since a part of the dressing material 17 is also embedded in the lower block 16, it is included in the present invention. Further, the structure of fitting the center belt into the center belt fitting groove of this embodiment can also be adopted in the previous embodiment.

FIG. 6 shows another embodiment of the fastening material 2
A part of 7 is embedded in the upper block 25, the center belt 24 is arranged between two fastening members 27 protruding from the upper block 25, and the fastening member 27 is inserted into the through hole 26b from below. The lower block 26 is fitted so as to pass therethrough, and the end portion 27a of the fastening material is bent and crimped so as to be buried in the groove 26c provided in the lower block 26.
The upper and lower blocks 25 and 26 are fixed.

In this embodiment, the upper block and the lower block of the first embodiment described above are reversed, and the same effect can be obtained even with such a structure, which is called the high load transmission belt of the present invention. be able to.

EFFECTS OF THE INVENTION The high load transmission belt of the present invention embeds a part of the fastening material made of wire in one block, and the center belt is provided between both blocks and between the fastening materials protruding from the one block. Since the other blocks are arranged so as to be sandwiched and the other block is caulked and fixed at the end of the fastening material, the fixing strength of the center belt and the block can be mechanically and firmly fixed by the fastening material. There is no need to make holes in the belt, so it is easy to crack the center belt, and there is no need to worry about cutting the core wire in the middle of the center bell when making holes. Further, since the belt side surface does not have a groove on the contact surface with the pulley, the rigidity is strong, and the side surface area is not narrowed, the life is long and the transmission efficiency is excellent.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a high load transmission belt according to the present invention.

FIG. 2 is a perspective view of a lower block of the high load transmission belt shown in FIG.

FIG. 3 is a perspective view of an upper block of the high load transmission belt shown in FIG.

4 is a cross-sectional view taken along the line AA in FIG.

5 is a cross-sectional view corresponding to FIG. 4 in another embodiment.

FIG. 6 is a sectional view corresponding to FIG. 4 according to still another embodiment.

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

[Explanation of symbols]

 1 High-load transmission belt 2 Elastomer 3 Core wire 4 Center belt 5 Upper block 6 Lower block 7 Fastening material 7a End 11 High-load transmission belt 14 Center belt 15 Upper block 16 Lower block 17 Fastening material 21 High-load transmission belt 24 Center belt 25 Upper block 26 Lower block 27 Fastening material

Claims (1)

[Scope of utility model registration request] Claims: 1. A center belt having a low elongation, high strength core wire spirally embedded in an elastomer and having ridges or recesses at a predetermined pitch on at least one side of the center belt, and blocks on both sides of the center belt. In a belt that is fitted and fixed in a convex portion or a concave portion, a center belt that is arranged between the upper and lower blocks by using a block in which a fastening material made of a wire is projected as the upper or lower block Is fixed by caulking the other block with a fastening material protruding from the block.