JPS62151647A - Link plate of chain - Google Patents

Abstract

PURPOSE:To withstand the hard operation by increasing the bonding strength between fibers to eliminate the risk of breakage in a link plate surrounded by sheet bodies formed by fibers with high strength. CONSTITUTION:A link plate 1 is formed like an elliptical circle by wrapping sheet bodies 3 formed by a plurality of fibers 2 with high strength round two pitch points 4, 5, and fixing the sheet bodies to each other. Accordingly, it is useful for reducing the weight of a chain, and during high speed rotation, the addition of centrifugal force can be decreased to enable high speed operation.

Description

Detailed Description of the Invention [Field of Industrial Application] By using a sheet body having high-strength fibers, the present invention can reduce the weight and improve the strength, and furthermore, it can resist the acting force applied in the lateral direction. Concerning chain link plates that can also withstand.

[Conventional technology]

Chain link plates have conventionally been made of stamped or forged steel plates. Products using fiber-reinforced plastics have been produced by punching out temporary materials, or by the so-called premix method, in which glass fibers and the like are kneaded with resin and then formed using a forming machine. However, in the case of punched reinforced plastic plates, the fibers are separated, and in the case of the premix method, the direction of the fibers cannot be made constant, resulting in poor strength. In order to solve some of these problems, the distributors of this morning proposed that several or more high-strength fibers be placed around two pitch points according to the specifications and drawings of Japanese Patent Application No. Sho GO-49778. We proposed forming a strong chain link plate by making the fibers go around and fixing them with an adhesive.

[Problem that the invention seeks to solve]

However, the above-mentioned Japanese Patent Application No. 60-49778 does not clearly disclose that the sea 1 is formed integrally with fibers. The bond strength is relatively weak, especially in link play (・
In cases where lateral i;/fff is added to the link plate, there is a risk that the link plate will break due to the fibers coming loose.

The present invention is a sheet formed using ini-strength fibers.

1. Move the body 7 times around the 2. pitch points and
The purpose of the present invention is to provide a link plate for a chain which is light in weight and has excellent strength, eliminates the risk of breakage, and can withstand severe operation, based on fixing chain members to each other.

[Means for solving problems]

Hereinafter, one embodiment of the means of the present invention capable of achieving the above-mentioned objects and solving the problems will be described with reference to the drawings.

In Figures 1 to 4, the link plate 1 of the chain is
Seat formed using multiple high-strength fibers 2 (
- An elongated annular link plate body 6 is formed by rotating the body 3 around two pitch points 4.5 and fixing the sheet bodies 3 to each other.

In this embodiment, as shown in FIG. 2, the sheet body 3 is made up of a plurality of fibers 2- disposed in a band shape, which are bonded together using a synthetic resin material 12 to be integrated. In addition, in this example, the sheet body 3
A thin 1'FJ13 made of adhesive is provided on the front and back surfaces of the board.

The fibers 2 are aromatic polyamide fibers, so-called aramid fibers, carbon fibers, alumina long fibers, etc.
Fibers having a tensile strength of about 0 kg/m or even higher are used.

As the synthetic resin material 12, a thermoplastic material that can be bonded to the fibers 2 by heating, such as nylon or polyethylene, can be suitably used. Further, by integrally molding or extruding such a synthetic resin material 12 together with the fibers 2-, a plurality of parallel fibers 2- can be bonded and fixed to each other.

As the adhesive, in addition to thermosetting polyester, epoxy or phenol resins, thermoplastic resins such as polyamide and polyacetal can be used, and epoxy resins are particularly preferably employed from the viewpoint of strength.

Further, the adhesive may be a molten metal such as lead or a solder alloy that melts at a relatively low temperature.

A thin layer 13 made of adhesive can be formed on the sheet body 3 by pasting the adhesive or forming it into a thin paper shape and attaching it to the front and back surfaces of the sheet body 3 in advance.

In addition, the sheet body 3 is formed using a plurality of high-strength fibers 2 by weaving the fibers 2 into a belt-like body using the fibers 2 as warp threads and thread-like bodies made of a synthetic resin material such as nylon as weft threads. You can also do that. In this way, the sheath 1 integral 3 is formed using a plurality of fibers 2.

In this embodiment, the link plate 1-1 of the chain includes a so-called inner link plate 7 and an outer link plate 9.9. In this embodiment, the chain is formed as a so-called block chain, and the medium size ratio of the inner and outer link plates 7.9 is set to approximately 2:1.

The sheet body 3 goes around the pitch point 4.5 and forms the link plate body 6 as described above. The pitch point 4.5 is the bending center of the chain, and the length therebetween forms the pitch of the chain.

Further, in this example, an annular mounting bracket 21.22 is arranged at the pitch point 4.5, and the sea 1 body 3 has the outer peripheral surfaces of the mounting bracket 21.21 and the mounting bracket 22.210 -
, and are wound around the pitch point 4.5 by bridging the two.

The sheet body 3 is rotated multiple times until a vertically long rectangular peripheral wall W is formed, and by fixing the sheet bodies 3 to each other, an elongated annular link play i/main body 6 connecting the pitch points 4.5 is formed. Form.

In this example, the width of the link plate main body 6 is determined to be equal to the width of the inner link plate 7, so that the link plate main body 6 can form the link plate main body 6A of the inner link plate as it is.

Further, by dividing the link plate body 6 into two along the longitudinal center as shown in FIG. 3, the link plate bodies 6B and GB of the two outer link plates 9.9 are formed.
: I can do it.

The link plate main body 6A of the inner link plate 7 is assembled by joining the mounting fittings 21 and 21 with adhesive.
The inner link plate 7 is formed, and the mounting bracket 21.2
1 forms an open gap G1 on the inside facing each other. The link plate main body 6B of the outer link plate 9 is connected to the link plate main body 6A of the inner link plate 1-7 by joining the mounting brackets 22 and 22. Mounting bracket 22.2
A gap G2 is formed inside the two facing each other. In this example, a separating piece 23 is inserted into the gap G2 to fill the gap G2, and I/[4 between the two pitch points 4.5 of the outer link plate 9 is maintained accurately.

The inner link plate 7 and the outer link plate 9 are connected to each other by using pins 26 inserted through holes 25.25 of the mounting fittings 21.22 provided at the pitch points 4.5 of each, thereby forming a series of chains. form.

In order to form the link plate main body 6, for example, a fourth
A device 30 can be used for the wrapping shown schematically in the figure.

The winding device 30 has an unwinding section 31 and a winding section 32, and the unwinding section 31 is pivotally supported by a bearing 34 on a base 35 and is braked by a brake device 36 attached to the base 35. The sheet body 3 wound around the bobbin 39 is fitted onto the core shaft 37.

In the winding section 32, an oval winding frame 45 having a circumferential surface along the inner circumferential surface of the link plate main body 6 projects from the tip of the output shaft 42 of the reduction motor M attached to the pedestal 41. side! Fi,
Fix 4G.

Note that the winding frame 45 is provided with a threaded portion 47.47 at its tip.

Further, in this example, the winding device 30 has an unwinding section 31 and a winding section 3.
A pair of heating tools 43, 43 are arranged vertically facing each other with a small gap between them.

The sheet body 3 has guide rollers 4 provided before and after the heating tool 43.
4. Pass through the small gap with the guidance of 44.

When producing the link plate main body 6, the guide plate 49 is placed at the tip of the winding frame 45, separated by the middle dimension of the side plate 46 and the sheet body 3, using a nut fitting or the like that is screwed into the threaded part 47.47. Fix it. Thereafter, the leading end of the sheet body 3 wound around the bobbin 39 is passed through the small gap between the heating tools 43 and 43 and fixed to the winding frame 45. As the reduction motor M is driven, the sheet body 3 is heated to a thin 1i1 by the heating tools 43 and 43.
13.13 is heated and rotates around the winding frame 45, so that the heated adhesive is wound around the winding frame 45 multiple times while fixing the sheet bodies 3 to each other. In addition, the core shaft 37
is braked by the brake tool 36, so that a tensile force is always applied to the sheet body 3 being wound up, so that the sheet body 3 is evenly and densely wound and strongly fixed.

The winding device 30 has the winding frame 45 shaped to match the inner peripheral surface of the link plate main body 6 as described above, so that the sheet body 3 can be wound at two pitches by going around the winding frame 45 a plurality of times. The link plate main body 6 can be formed in an elongated annular shape around the point 4.5, bridging the two pitch points and connecting the pitch points.

Note that when forming the link plate body 6, after forming the peripheral wall W, the sheet body 3 is impregnated with an adhesive by vacuum impregnation or the like, and then heated and cured using an autoclave or the like to fix the sheet bodies 3 to each other. You can also do it.

FIG. 5 shows another embodiment in which the link plate l of the chain of the present invention is a link plate for a so-called roller chain.

In this example, the link plate 1 includes an inner link plate 51,
Including the outer link plate 52, and the inner and outer link plates 1
-5152 is a mounting bracket 55.55 disposed at two pitch points 4.5 similarly to the link plate bodies 6A and 6B of the inner and outer link plates 7.9 shown in FIG.
, the sheet body 3 formed using a plurality of high-strength fibers 2 is passed around the outer circumferential surface of the mounting bracket 56, 56 multiple times, and the sheet body 3 is fixed to each other, thereby forming a pitch. An elongated annular link plate body 6 connecting points 4.5 is formed.

The inner link plate 52.52 engages a bushing 57 in a fitting 55.55 provided at each pitch point 4.5. Note that a roller 58 is mounted on the bush 57. Also bushing 57
A series of chains is formed by fitting the pins 59 passing through the through holes in the fittings 56.56 of the outer link plates 52.52.

The link play 1-1 of the chain of the present invention is applicable not only to the above-mentioned block chain and roller chain, but also to so-called bushes and toner chains that do not have rollers. It can also be used in so-called offset type chains that are connected sequentially.
Furthermore, it may be a link plate that forms the link itself of a so-called short link chain in which only oval annular link plate bodies are sequentially connected, and the chain link plate of the present invention can be used in various types of 5-ane chains. .

〔Effect of the invention〕

The link plate of the chain of the present invention is made up of a link plate 1 and a main body in which a sheet body formed using a plurality of high-strength fibers is rotated around two pitch points and the sheet bodies are fixed to each other. This helps reduce the weight of the chain, reduces the addition of centrifugal force during high-speed rotation, makes high-speed operation possible, and improves the transmission horsepower of the chain.

In addition, it eliminates the risk of link plates being damaged due to the fibers coming apart, which is the case with chains that are formed only by winding fibers.Also, it is strong against lateral loads, increasing the reliability of the chain and resisting impact loads. It can also be used for severe driving that involves

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the sheet body, and Fig. 3 is a perspective view showing a link plate body formed using the sheet body. , 4th
The figure is a perspective view showing an example of a winding device, and FIG. 5 is a longitudinal cross-sectional view of another example of a chain using the link plate of the present invention. 2-Fiber, 3-Sheet body, 4.5-Pitch point, 6-Link play I/Main body.

Claims (1)

[Claims] A sheet body formed using multiple high-strength fibers is
A link plate of a chain in which an elongated annular link plate body connecting pitch points is formed by rotating the sheet bodies multiple times around one pitch point and bridging two pitch points, and fixing the sheet bodies to each other.