JPH04138144U - High load transmission belt - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to securely fix the block and center belt without drilling holes in the block, and it has excellent productivity, and it also allows sufficient lateral area of the block to be secured for transmission. Obtain a high-load transmission belt with excellent efficiency and durability. [Structure] First and second blocks 6, 5 are provided on both upper and lower surfaces of the center belt 4, in which the core wire 3 is embedded in the elastomer 2.
A part of the rivet 7 is embedded in the first block, a center belt 4 is placed between the first block 5 and the second block 6, and the rivet 7 is fixed to the second block. The leg portion 7a is made to protrude through the through hole 5b,
It is fixed by caulking the leg portions 7a.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a block belt, and a through hole is made in the center belt. It relates to things that are fixed without being fixed.

[Conventional technology]

0002 Conventionally, high-load power transmission belts with blocks fixed to a center belt have Drill through holes in each of the rack and center belt and attach them with bolts or rivets. There was something fixed. Such belts are not reliable in terms of fixing strength. Therefore, it was suitable for use in high-load transmission applications.

0003 However, with this structure, it is essential to make a hole in the center belt. This will cut the core wire inside the center belt, so It was inevitable that the strength would be reduced. Also, during manufacturing, holes are drilled. This belt has many processes such as tightening bolts and rivets, and is cost-effective. It is also disadvantageous in terms of

0004 Therefore, the block can be firmly fixed without making a hole in the center belt. In addition, the present applicant has proposed a belt with a structure that also has good productivity. (Patent application Hei 1-2611 38)

[0005] This belt is as shown in Figure 7, with grooves 35a and 36a around the upper and lower belts. Using locks 35 and 36, overlap center belt 34 and blocks 35 and 36 It is then secured by wrapping it with a fastening material 37 made of wire, and with this structure, There is no need to make holes in the center belt 34, and the fastening material 37 is shaped into a U-shape in advance. If you mold it, just fit it into the upper and lower blocks 35 and 36 and bend and swage it. It can be fixed in place without reducing the strength of the center belt 34 and also improves productivity. It can be said that it is excellent.

[0006]

[Problem that the idea aims to solve]

However, as mentioned above, the block is tightened by wrapping the fastening material around the block. A groove is provided to secure the center belt and the belt. When used with a pulley wrapped around it, the side of the block that comes into contact with the pulley is different from the conventional one. It is smaller than the belt.

[0007] Belts are known for their high transmission efficiency and long service life when transmitting power. It is important that the side of the block that forms the side of the belt that contacts the pulley If is small, the transmission efficiency will be low, the wear resistance will be poor, and the life will be shortened.

[0008] Furthermore, because the wall thickness of the block is small, the rigidity of the block is also insufficient. This also relates to issues of transmission efficiency and lifespan.

[0009] Therefore, the present invention takes the above problems into account and creates holes in the block. The block and center belt can be firmly fixed without any problem, and it has excellent productivity. , and can handle high loads with excellent transmission efficiency and life without reducing the lateral area of the block. The purpose is to provide power transmission belts.

0010

[Means to solve the problem]

In order to achieve this purpose, this invention uses a low elongation, high strength core wire in an elastomer. Embedded in the center plate and having protrusions or recesses at a predetermined pitch on at least one side. Fit the blocks on both the upper and lower sides of the belt into the convex or concave part of the center belt. In a fixed high-load transmission belt, the first block has two protruding rivets. Place the center belt between the first block and the second block, and Pass the rivet protruding from the second block through the through hole provided in the second block, and insert the leg of the rivet into the second block. By protruding and caulking the legs, connect the first and second blocks and the center belt. It is characterized by being fixed. Also, for reasons that will be discussed later, the first block with the rivet protruding is approximately U-shaped. The two legs of the shaped rivet are passed through the through holes provided in the block piece. preferable. Furthermore, the first block with the rivet protruding is the U-shaped part of the approximately U-shaped rivet. It is also possible to have a structure in which the portion is embedded within the block piece.

[0011]

[Effect]

The high-load power transmission belt of the present invention has a first block with two protruding rivets, and a second block with two protruding rivets. A center belt is placed between the two blocks and protrudes from the first block. Pass the rivet through the through hole provided in the second block to make the leg protrude, and then By tightening the structure, the first and second blocks and the center belt are fixed. Since there is no need to drill holes in the center belt, there will be no cracks in the center belt. Otherwise, the core wire in the center belt may be cut when drilling the hole. There is no need to worry. Furthermore, there is no need to create a groove on the contact surface with the pulley on the side of the belt. It has strong rigidity and the side area does not become narrow, so it has a long life and excellent transmission efficiency. Ru.

0012 Also, the first block from which the rivet protrudes is the U-shaped part of the approximately U-shaped rivet. By embedding it in the block piece, the productivity is almost U-shaped. A part of the shaped rivet is buried in one of the blocks in advance, and the fixation is done by that. This can be easily done by simply caulking the ends of the legs.

【Example】

[0013] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0014] FIG. 1 is a perspective view showing one embodiment of the present invention, and the high-load power transmission belt 1 of the present invention is A high load is applied to both the upper and lower surfaces of the center belt 4, which has the core wire 3 buried in the elastomer 2. First and second blocks 6 and 5 are provided for transmission, respectively, to ensure rigidity and lateral pressure resistance. What kind of reinforced belt is this?

[0015] Examples of those used as the elastomer 2 include NR (natural rubber) and SB. R (styrene-butadiene rubber), CR (chloroprene rubber), NBR (nitrogen rubber) rubber), Hypalon (chlorosulfonated polyethylene), HNBR (hydrogenated polyethylene), A single rubber material such as trill rubber, or a rubber compound made of a blend of these materials. or polyurethane resin.

[0016] The core wire 3 buried in the center belt 4 is made of glass fiber or aramid fiber. , low elongation and high strength made of polyamide fiber, polyester fiber, metal wire, etc. A force rope tensile body is used.

[0017] The first and second blocks 6 and 5 have greater rigidity than the center belt. Hard rubber with a hardness of 90° or more, hard polyurethane resin, liquid crystal resin, phenolic resin resin, epoxy resin, polyamide resin, polyester resin, acrylic resin, metal Resins such as krill resin, or cotton yarn, chemical fibers, glass fibers, It is made of reinforced resin mixed with short fibers such as metal fibers.

[0018] Next, the first and second blocks 6, 5 are placed on both sides of the center belt 4. In other words, on the contact surfaces of the center belt 4 and the first and second blocks 6, 5, On both sides of the center belt 4, there are protrusions 4a and 4b extending in the width direction of the belt. , on the other hand, the contact surfaces of the blocks 6 and 5 with the center belt 4 are provided with the protruding portions 4a and 4. Recessed grooves 5a and 6a are respectively formed to tightly fit into the first and second blocks. 6, 5 and the center belt 4 are prevented from shifting in their longitudinal positions. . Regarding this structure, the protruding part and the recessed part may be reversed, and the protruding part is placed on the block side. Even if a recess is provided on the center belt 4 side and fitted, the first and second blocks 6, 5 The positional shift of the center belt 4 can be controlled. In addition, such an uneven fitting structure The present invention can be implemented even if the block is only in either the first or second block. There is no inconvenience.

[0019] Among the first and second blocks 6 and 5, the first block 6 is approximately U as shown in FIG. The block is made so that a part of the rivet 7 is buried in advance when the block is molded. from near the end of the recess 6a of the first block 6 to the leg 7a of the rivet 7. , 7a have two protruding shapes.

[0020] The high-load power transmission belt 1 of the present invention consists of the above-mentioned components, and as shown in FIG. Set between the legs 7a, 7a of the two rivets 7 protruding from the first block 6. Place the interbelt 4 and place the second block 5 on top of the leg 7a of the rivet 7. , 7a pass through the through hole 5b, and screw the legs 7a, 7a of the rivet 7. By doing so, the fixation between the center belt 4 and the first and second blocks 6, 5 is completed. Complete.

[0021] The high-load power transmission belt 1 of the present invention has such a structure, so that the rivets 7 A part of it is buried in the first block 6 in advance, and then it is buried in the second block. Assembling the belt is extremely easy and productive as it is simply caulked to block 5. The center belt 4 and the first and second blocks 6 and 5 are fixed using rivets 7. Since it is mechanical, it has excellent fixing strength, and there are holes in the center belt 4. Since it can be fixed without opening the center belt 4, it can be fixed without opening it. There is no chance of cutting the core wire 3. Furthermore, grooves are added to the contact surface with the pulley on the side of the belt. There is no need for installation, the rigidity is strong, and the side area does not become narrow, so the life is long and the transmission It is also highly efficient.

[0022] Fig. 5 shows another embodiment of the high-load power transmission belt of the present invention. In the route 11, the rivet 17 is partially buried in the first block 16; It appears on the surface from the bottom surface of the block 16. And the second block 15 is block A groove 18 for caulking and fixing a rivet 17 is provided on the side surface of the hook. Change A center belt fitting groove 19 is formed in the lower block 16, and a center belt fitting groove 19 is formed in the lower block 16. The belt 14 is fitted into the center belt 14 and the first and second blocks 15, 16. This prevents misalignment in the belt width direction.

[0023] In such a structure, since the groove 18 is provided in the second block 15, the bell Although the lateral area of the first block 1 is smaller than that of the previous embodiment, at least the first block 1 There is no groove on the side surface of block 6, and a portion of rivet 17 is also buried in first block 16. Therefore, it is included in this invention. In addition, the center belt fitting groove of this example The structure in which the center belt is fitted in can also be adopted in the previous example. be.

[0024] FIG. 6 shows yet another embodiment, in which a part of the rivet 27 is different from the previous embodiment. It is embedded in the first block 25 located outside the belt, and the first block The center belt 24 is placed between the two rivets 27 protruding from the hook 25. The second block 26 is fitted so that the rivet 27 passes through the through hole 26b from below. The end portion 27a of the rivet is inserted into the counterbore 26c provided in the first block 26. The center belt 24 and the first and second blocks 2 are caulked so as to be buried therein. 5 and 26 are fixed.

[0025] This embodiment replaces the second and first blocks of the first embodiment. The same effect can be obtained with this structure, and this is the case in this study. It can be called a high-load transmission belt. In addition, the caulked part of the rivet is stored during counterboring, so the caulked part is protected. This prevents the rivet from coming off and helps extend the life of the belt.

[0026]

[Effect of the idea]

The high-load transmission belt of this invention has a second block with two protruding rivet legs. and a second block, and a center belt is placed between the second block and the second block. Pass the leg of the released rivet through the through hole provided in the first block and let the leg protrude. , fix the first and second blocks and the center belt by caulking the legs. The center belt and block have a fixed structure with no rivets. It can be firmly fixed mechanically with a hole in the center belt. This prevents the center belt from cracking or making holes. There is no need to worry about cutting the core wire in the center belt. Furthermore, the side of the belt There is no groove on the contact surface with the pulley, the rigidity is strong, and the side surface area is narrow. Because there is no carbon, it has a long life and has excellent transmission efficiency.

[Brief explanation of drawings]

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

FIG. 2 is a perspective view of a first block of the high-load power transmission belt shown in FIG. 1;

FIG. 3 is a perspective view of a second block of the high-load power transmission belt shown in FIG. 1;

FIG. 4 is a sectional view taken along line AA in FIG. 1;

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

FIG. 6 is a sectional view corresponding to FIG. 4 in yet another embodiment.

FIG. 7 is a perspective view of essential parts 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 Rivets 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 front page (72) Creator Isao Koyama Mitsu, 4-1-21 Hamazoe-dori, Nagata-ku, Kobe Inside Hoshi Belt Co., Ltd.

Claims (3)

[Scope of utility model registration request] [Claim 1] A center belt having low elongation and high strength core wire embedded in an elastomer in a spiral shape and having protrusions or recesses at a predetermined pitch on at least one side. Blocks are provided on both upper and lower surfaces of the center belt. In a belt that is fitted and fixed in a convex portion or a recessed portion, a center belt is arranged between a first block in which a part of a rivet is embedded and two legs protrude, and a second block, The rivet protruding from the first block is passed through a through hole provided in the second block, the legs of the rivet are protruded, and the legs are caulked to fix the first and second blocks and the center belt. A high-load power transmission belt that is characterized by: 2. The high-load power transmission belt according to claim 1, wherein the first block from which the rivet is projected has both legs of a substantially U-shaped rivet passed through through holes provided in the block piece. 3. The high-load power transmission belt according to claim 1, wherein the first block from which the rivet projects is formed by embedding the U-shaped portion of the approximately U-shaped rivet in a block piece.