JP2502120Y2 - 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, which is fixed to a center belt without forming a through hole.

[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 is as shown in FIG. 7. Grooves 35a and 36a are provided on the periphery of the belt, and lower blocks 35 and 36 are used. The center belt 34 and the blocks 35 and 36 are superposed on each other and fastened with a wire rod. This structure is to be fastened and fixed by a material 37. With this structure, it is not necessary to make a hole in the center belt 34. If the fastening material 37 is preliminarily shaped into a U shape, the upper and lower blocks 35, 36 can be formed. 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. The side surface of the block that comes into contact with the pulley when the pulley is also wound and used 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 has a core having a low elongation and a high strength, which is embedded in an elastomer and has a ridge or a recess at a predetermined pitch on at least one surface. In a belt formed by fitting and fixing blocks on the upper and lower surfaces of the belt in the convex portion or the concave portion of the center belt, the U-shaped portion of the substantially U-shaped rivet is
Embed in the first block and project two legs
Then , a center belt is arranged between the first block and the second block, and the rivet projecting from the first block is passed through the through hole provided in the second block to project the leg part of the rivet. And the first and second blocks and the center belt are fixed by caulking the legs.

[0011]

In the high load transmission belt of the present invention, the center belt is arranged between the first block with the two rivets projecting and the second block, and the rivet projecting from the first block is the second block. The leg is projected through a through hole provided in the block and the leg is caulked to fix the first and second blocks to the center belt, and there is no need to make a hole in the center belt. Therefore, there is no concern that the center belt will be easily cracked or that the core wire in the center belt will be cut when the hole 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.

Further, the first block with the protruding rivet has a structure in which the U-shaped portion of the substantially U-shaped rivet is embedded in the block piece, so that the productivity of the first U-shaped rivet is improved. The part is embedded in one of the blocks in advance, and fixing can be easily performed because only the ends of the legs are caulked.

【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. First and second blocks 6, respectively, for transmission
5 is a belt for which rigidity and lateral pressure resistance are enhanced.

As the elastomer 2 used, 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 first and second blocks 6 and 5 have higher rigidity than the center belt, specifically, hard rubber having a hardness of 90 ° or more, hard polyurethane resin, liquid crystal resin, phenol resin, epoxy resin, polyamide resin, It is made of a resin such as a polyester resin, an acrylic resin, or a methacrylic resin, or a reinforced resin in which a short fiber group made of cotton yarn, chemical fiber, glass fiber, metal fiber or the like is mixed.

Next, when arranging the first and second blocks 6 and 5 on both sides of the center belt 4, the center belt 4 and the first and second blocks 6 and 5 are in contact with each other, that is, the center belt. 4 have ridges 4a and 4b respectively extending in the belt width direction, while the blocks 6 and 5 have contact surfaces with the center belt 4 which have the ridges 4a and 4b.
And concave grooves 5a and 6a for tightly fitting with are respectively formed,
The positions of the first and second blocks 6 and 5 and the center belt 4 in the belt longitudinal direction are not displaced. In this structure, the ridge portion and the concave portion may be reversed, and even if the ridge portion is provided on the block side and the concave portion is provided on the center belt 4 side, the first and second blocks 6 and 5 are fitted together. The position shift of the center belt 4 can be regulated. Further, even if such a concavo-convex fitting structure is provided on only one of the first and second blocks, there is no inconvenience in carrying out the present invention.

Of the first and second blocks 6 and 5, the first block 6 is a rivet 7 having a substantially U shape as shown in FIG.
Part of the rivet 7 is preliminarily buried when the block is molded, and two legs 7a, 7a of the rivet 7 project from the vicinity of the end of the recess 6a of the first block 6. .

The high load transmission belt 1 of the present invention comprises the above-mentioned components, and the center belt is provided between the legs 7a, 7a of the two rivets 7 protruding from the first block 6 as shown in FIG. 4 is placed, the second block 5 is fitted from above, so that the leg portions 7a, 7a of the rivet 7 pass through the through holes 5b, and the leg portions 7a, 7a of the rivet 7 are caulked. Fixing with the first and second blocks 6 and 5 is completed.

The high-load transmission belt 1 of the present invention has such a structure, so that a part of the rivet 7 previously embedded in the first block 6 is used and the second block 5 is caulked. As it is only, the assembly work of the belt is very easy and the productivity is good, and the center belt 4
The first and second blocks 6 and 5 are fixed mechanically by the rivets 7, so that they have excellent fixing strength and can be fixed without making holes in the center belt 4, so that the center belt 4 is not cracked. The core wire 3 is not cut off when entering or opening a hole. 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 rivet 17 is partially embedded in the first block 16 but is in the first block. 16 is exposed from the lower surface to the surface. And the second block 15 has rivets 17 on the side of the block.
A groove 18 is provided for crimping and fixing. Further, a center belt fitting groove 19 is formed in the lower block 16, and the center belt 14 is fitted therein to prevent the center belt 14 and the first and second blocks 15 and 16 from being displaced in the belt width direction. ing.

In the case of such a structure, the second block 15
Since the groove 18 is formed in the belt, the side area of the belt is smaller than that in the previous embodiment, but at least the side surface of the first block 16 has no groove and a part of the rivet 17 also includes the first block 16. It is included in the present invention because it is embedded in. 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 still another embodiment, in which a part of the rivet 27 is embedded in the first block 25 located outside the belt unlike the above-mentioned embodiment, and the first block 25 is provided. The center belt 24 is arranged between two rivets 27 protruding from the rivet 27, and the rivet 27 is inserted from below the center belt 24.
The second block 26 is fitted so as to pass through the through hole 26b, and the end portion 27a of the rivet is caulked so as to be buried in the counterbore 26c provided in the first block 26. , The second block 25, 26
Has been fixed.

In this embodiment, the positions of the second block and the first block of the first embodiment described above are reversed, and similar effects can be obtained with such a structure.
The high load transmission belt of the present invention can be said. Also,
Since the rivet caulking part is stored while counter-sunk, the caulking part is protected and the rivet can be prevented from coming off, which also contributes to extending the life of the belt.

[0026]

[Effects of the Invention] The high load transmission belt of the present invention is substantially U-shaped.
The rivet's U-shaped part is embedded and the two legs project
A center belt is arranged between the first block and the second block, and the leg portion of the rivet projecting from the first block is passed through a through hole provided in the second block to project the leg portion. first by caulking legs, and Tsu adopted a structure fixing the second block and the center belt, for fixing strength of the center belt and blocks can be mechanically firmly fixed by rivets, and Since there is no hole in the center belt, it is easy to crack the center belt, and there is no need to worry about cutting the core wire in the center belt when opening the hole. Further, since at least one of the upper and lower blocks of the center belt is not provided with a groove on the contact surface with the pulley, the rigidity is high and the belt side surface area can be sufficiently wide so that 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 first block of the high load transmission belt shown in FIG.

FIG. 3 is a perspective view of a second 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 Second block 6 First block 7 Rivet 7a End 11 High-load transmission belt 14 Center belt 15 Second block 16 First block 17 Rivet 21 High Load transmission belt 24 Center belt 25 Second block 26 First block 27 Rivet

 ─────────────────────────────────────────────────── ─── Continuation of the front page Examiner Toshiaki Fujii (56) References JP-A-3-125052 (JP, A) Actual exploitation Sho 62-121449 (JP, U) Actual exploitation Sho 63-152946 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A center belt having a low elongation, high strength core wire spirally embedded in an elastomer, and having a convex portion or a concave portion at a predetermined pitch on at least one surface, and blocks on both lower and upper surfaces of the center belt. For a belt that is fitted and fixed in a ridge section or a recess section, a substantially U-shaped rib
The U-shaped portion of the skirt is embedded in the first block, and the two legs are projected, and between the two legs and the first block. , A center belt is arranged between the second blocks, and the rivet protruding from the first block is passed through a through hole provided in the second block to project the leg portion of the rivet, and the leg portion is caulked. Thus, the high load transmission belt is characterized in that the first and second blocks and the center belt are fixed.