JP2590431Y2 - High load transmission belt - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a block belt, and a method for fixing a block to a center belt using a fastening member made of a wire material and fixing the block to the center belt without opening a through hole. Related to

[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 the blocks are fixed with bolts or rivets. Such belts were reliable in terms of fixing strength and were suitable for use in high load transmission applications.

However, in this structure, it is an essential condition 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. Did not. Further, in manufacturing, this belt having a number of steps such as a drilling operation, a bolt and rivet fastening operation, and the like is disadvantageous in terms of cost.

For this reason, the present applicant 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 groove 45a, 46a around the belt as shown in FIG. 7, and uses a lower block 45, 46 to overlap the center belt 44 with the block 45, 46 to fasten a wire. With this structure, it is not necessary to make a hole in the center belt 44, and if the fastening material 47 is previously molded into a U-shape, the upper and lower blocks 45, 46 can be formed. It can be fixed simply by fitting it into the belt and crimping it.
It can be said that the strength of Sample No. 4 is not reduced and the productivity is excellent.

[0006]

However, as described above, a groove is provided around the block so as to fix the block to the center belt by winding a fastening material around the block. The side surface of the block that comes into contact with the pulley when the pulley is wound around is also smaller than the conventional belt.

It is important that the transmission efficiency of the belt and the life of the belt are important in transmitting power. If the side surface of the block forming the side surface of the belt in contact with the pulley is small, the transmission efficiency is low. In addition, the wear resistance is deteriorated, so that the life is shortened.

Further, the small thickness of the block may result in insufficient rigidity of the block, 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 providing a groove on the side surface of the block, and
It is an object of the present invention to provide a high-load transmission belt excellent in transmission efficiency and service life without reducing the immediate area of the block.

[0010]

In order to achieve the object of the present invention, a low-strength, high-strength core wire is spirally embedded in an elastomer, and at least one surface is provided with a ridge or a recess at a predetermined pitch. In a belt in which blocks are fitted and fixed on the upper and lower surfaces of the center belt having a convex ridge or a concave portion of the center belt, two fastening members made of a wire are projected as either the upper or lower block. The center belt is arranged between the upper and lower blocks, and the fastening material protruding from the block is passed through the through-hole of the other block without penetrating the center belt, and from the through-hole, The two protruding fastening materials are bent along the block, and their ends are welded and fixed.

[0011]

The high-load transmission belt of the present invention embeds a part of the fastening material made of a wire in one block to project two fastening materials, and the center belt is between the two blocks and from the one block. It is arranged so as to be sandwiched between the protruding fastening materials, and the two fastening materials are welded to each other and fixed, so the fixing strength of the center belt and block is mechanically determined by the fastening materials. The belt can be fixed firmly, and welding can be performed at only one place for each block, so that belt assembly is easy. In addition, since there is no hole in the center belt, the center belt is easily cracked, and the core wire in the center belt is cut when the hole is opened, reducing the number of core wires effective for power transmission. Not even. Furthermore, there is no groove on the contact surface of the belt side surface with the pulley, the rigidity is high, and the area of the side surface is not reduced, so that the life is long and the transmission efficiency is excellent.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing one embodiment of the present invention. A high-load transmission belt 1 of the present invention applies a high load to both upper and lower surfaces of a center belt 4 having a core 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.

FIG. 1 is a perspective view showing one embodiment of the present invention. A high-load transmission belt 1 of the present invention applies a high load to both upper and lower surfaces of a center belt 4 having a core 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.

Examples of the elastomer 2 include NR (natural rubber), SBR (styrene / butadiene rubber), CR (chloroprene rubber), NBR (nitrile rubber), hypalone (chlorosulfonated polyethylene), HNBR ( A single rubber material such as hydrogenated nitrile rubber), or a rubber compound or a polyurethane resin made of a blend material thereof.

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

The upper and lower blocks 5 and 6 have higher rigidity than the center belt, specifically, a hard rubber having a hardness of 90 ° or more, a hard polyurethane resin, a liquid crystal resin, a phenol resin, an epoxy resin, a polyamide resin, a polyester resin, It is made of a resin such as 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 in these resins.

Next, when arranging the upper and lower blocks 5 and 6 on both sides of the center belt 4, the contact surfaces between the center belt 4 and the upper and lower blocks 5 and 6, that is, both sides of the center belt 4 Protrusions 4a, 4b extending in the belt width direction, respectively, and concave grooves 5a, 6a tightly fitted with the protrusions 4a, 4b are provided on the contact surfaces of the blocks 5, 6 with the center belt 4. The upper and lower blocks 5, 6 and the center belt 4 are formed so as not to be displaced from each other in the belt longitudinal direction. With respect to this structure, the convex ridge and the concave may be reversed, and the convex ridge may be provided on the block side, the concave may be provided on the center belt 4 side, and the fitting may be performed.
The displacement between the lower blocks 5, 6 and the center belt 4 can be restricted. In addition, there is no inconvenience in practicing the present invention, even if such an uneven fitting structure is provided in only one of the upper and lower blocks.

As shown in FIG. 2, the lower block 6 of the upper and lower blocks 5 and 6 is configured such that a part of a fastening member 7 composed of a substantially U-shaped metal wire member is buried in advance at the time of molding the block. The lower block 6 has a recess 6
Two fastening members 7 protrude from the vicinity of the end of “a”.

FIG. 3 shows one embodiment of the high-load transmission belt of the present invention. Among the members forming the high-load transmission belt, the upper block 5 protrudes from the lower block 6 as shown in FIG. A through hole 5b through which the fastening material 7 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 crimped are formed. Then, as shown in FIG. 3, the center belt 4 is arranged between the two fastening members 7 protruding from the lower block 6, and the upper block 5 is placed on the center belt 4 from above.
Is inserted through the through hole 5b, and the end 7a of the fastening material
Is bent and the swaged portion is inserted into the groove 5c of the upper block 5.
Then, the center belt 4 and the upper and lower blocks 5 and 6 are completely fixed by welding 9 at the tip.

By adopting such a structure, the fastening member 7 is bent and crimped to the upper block 5 and then welded 9, so that the fixing strength between the center belt 4 and the upper and lower blocks 5 and 6 is further increased. It becomes something.

FIG. 5 shows another embodiment of the high-load transmission belt of the present invention. In this high-load transmission belt 21, the fastening material 27 is partially embedded in the lower block From the lower surface to the surface. The upper block 25 is provided with a groove 28 on the side surface of the block for winding and fastening the fastening material 27. Further, a center belt fitting groove 29 is formed in the lower block 26, and the center belt 24 is fitted therein to prevent the center belt 24 from being displaced in the belt width direction between the upper and lower blocks 25 and 26.

In the case of such a structure, the side area of the belt is smaller than that of the previous embodiment because of the provision of the groove 28 in the upper block 25, but at least there is no groove on the side surface of the lower block 26 and the tightening is performed. A part of the material 27 is also buried in the lower block 26, and the tip of the material 27 is raised and welded 29, which is included in the present invention. Further, the structure in which the center belt is fitted into the center belt fitting groove of this embodiment can be adopted in the previous embodiment.

FIG. 6 shows still another embodiment, in which the fastening material 3 is used.
7 is buried in the upper block 35, a center belt 34 is disposed between two fastening members 37 protruding from the upper block 35, and the fastening member 37 is inserted into the through hole 36b from below. The lower block 36 is fitted so as to pass through, and the distal end of the bent caulking material 37 is overlapped and welded 39 so that the fastening material 37 is buried in the groove 36 c provided in the lower block 36, and welded 39. Upper and lower blocks 35 and 36 are fixed.

This embodiment is obtained by reversing the upper block and the lower block of the above-described embodiment. The same effect can be obtained with such a structure, and the high load transmission belt of the present invention can be said.

[0026]

According to the present invention, the high-load transmission belt of the present invention embeds a part of the fastening material composed of a wire in one block to project two fastening materials, and the center belt is provided between the two blocks and the one of the two. It is arranged so as to be sandwiched between the fastening materials protruding from the block, and the two fasteners are welded to each other and fixed at their ends. The belt can be fixed firmly, and welding can be performed at only one place for each block, so that the belt can be easily assembled. In addition, since there is no hole in the center belt, the center belt is easily cracked, and the core wire in the center belt is cut when the hole is opened, reducing the number of core wires effective for power transmission. Not even. Furthermore, there is no groove on the contact surface of the belt side surface with the pulley, the rigidity is high, and the area of the side surface is not reduced, so that the life is long and the transmission efficiency is excellent.

[Brief description of the 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 sectional view taken along line AA in FIG. 1;

FIG. 4 is a perspective view of an upper block of the high-load transmission belt shown in FIG.

FIG. 5 is a sectional view corresponding to FIG. 3, showing another embodiment.

FIG. 6 is a sectional view corresponding to FIG. 3, showing an embodiment in which a fastening material is embedded in an upper block.

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

[Explanation of symbols]

 DESCRIPTION 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 21 High load transmission belt 24 Center belt 25 Upper block 26 Lower block 27 Fastening material

Continuation of the front page (56) References JP-A-61-171936 (JP, A) JP-A-62-88845 (JP, A) JP-A-60-234149 (JP, A) , U) Actually open 1984-577851 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16G 5/16

Claims (1)

(57) [Scope of request for utility model registration] 1. A center belt having a low elongation and high strength core wire spirally embedded in an elastomer and having a ridge or a recess at a predetermined pitch on at least one surface, and a block on both lower surfaces of the center belt. In the belt which is fitted and fixed to the ridge portion or the concave portion, the upper or lower block is formed by projecting two fastening members made of a wire, and a center belt is provided between the upper and lower blocks. And passing the fastening material projecting from the block through the through hole of the other block without penetrating the center belt, bending the two fastening materials projecting from the through hole along the block, High load transmission belt characterized by welding and fixing the tips of the belts.