JP2631308B2 - Annular reinforcement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is configured such that a reinforcing yarn and a reinforcing yarn are appropriately knitted and the reinforcing yarn is reinforced with the reinforcing yarn. It relates to an annular reinforcement.

(Related Art) As a reinforcing material for a conventional molded product, for example, a circular woven fabric for reinforcing material is found. There is a disadvantage in that the weaving density of the yarn is coarse, and further, since the warp and the weft cross, the yarn for the reinforcing material is bent to increase the elongation and is also disadvantageous in that it is easy to cut.

In addition, when the reinforcing material thread is wound around the tubular body and molded,
There is a drawback that the reinforcement is weak because the lateral connection of the reinforcing material thread, that is, the locking force is weak.

(Means for Solving the Problem) The present invention is to solve such a conventional problem. As a specific means for solving the problem, after knitting a reinforcing yarn several courses, 1 thread
Since the knitting of the course insertion knitting is performed as one repeat and the content of the reinforcing yarn is set to be 0.1 to 70%, the reinforcing yarn is completely covered with the reinforcing yarn. Moreover, since the reinforcing material thread is inserted and knitted in a straight line without bending, an annular reinforcing material excellent in strength, handling and the like and highly reliable can be obtained.

 Hereinafter, the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a part of the annular reinforcing material 1 cut and sectioned, 2 is a reinforcing fabric made of a knitted knitted fabric or the like, 3 and 4 are a surface material and a lining of the fabric 2 respectively, and 5, 5,.
Is a reinforcing material thread inserted and knitted between the front and backings 3 and 4, respectively.

FIG. 2 shows a knitting diagram (Milan rib changing knitting structure) for knitting a tubular reinforcing material using a milling circular knitting machine, and reference numerals 6 and 7 denote an upper needle and a lower needle, respectively.

At the first and second yarn feeders in (1) and (2) of FIG. 2, the reinforcing yarns 8, 8 are supplied to the upper needle 6 and the lower needle 7, respectively, and knitted to form the lining 4, the outer fabric 3. In the third yarn feeder, a reinforcing yarn 5 is inserted and knitted between the outer material and the linings 3 and 4, and further in the fourth yarn feeder, the reinforcing yarn 8 is inserted into the upper and lower needles 6 and 7. The knitting operation is repeated in the fifth to eighth yarn feeders, and the same knitting operation as in the first to fourth yarn feeders is repeated. Then, the fabric is cut to the required length in the course direction to obtain an annular reinforcing material.

FIGS. 3 and 4 are knitting structure diagrams by a double-sided circular knitting machine, in which a tubular reinforcing material is knitted by a double-sided change knitting structure diagram and a mock Milano rib change knitting structure diagram, respectively.

When knitting the reinforcing yarn 8, if the knitting operation is particularly difficult due to the fineness of the same yarn 8, for example, a soluble yarn may be attached to the reinforcing yarn 8 for plating and knitting. Good.

Further, it is preferable to use, for example, carbon fiber, glass fiber, aramid fiber, alumina fiber or the like as the reinforcing material yarn 5, and as the yarn 5, it is preferable to use a twisted yarn, a ply-twisted yarn, an alternating twisted yarn, or a aligned yarn. For example, it is preferable to use an appropriate yarn.

Further, the number of filaments of the reinforcing material yarn 5 is 1 to 10
The range of 0000 is preferable, and the thickness per monofilament of a monofilament or a multifilament yarn is 0.1 to 500.
In the range of 0 denier, the thickness of the whole yarn is preferably in the range of 100 to 300,000 denier.

Further, as the reinforcing yarn, for example, various synthetic fibers, mineral fibers, natural fibers and the like in addition to polyester-based synthetic fibers and nylon-based synthetic fibers are preferable, and the form of the yarn is a mono- or multi-filament yarn. Strips, bulky yarns, twisted yarns and the like are preferred.

Further, the number of filaments of the reinforcing yarn is preferably in the range of 1 to 10,000, and the thickness of each filament or multifilament yarn is preferably in the range of 0.1 to 500 denier per single fiber, and the thickness of the entire yarn is The thickness is preferably in the range of 1 to 10,000 denier.

Incidentally, in the annular reinforcing material of the present invention, the content of the reinforcing thread is preferably in the range of 0.1 to 70% by weight.

Furthermore, in order to sufficiently explain the content of the present invention, examples and comparative examples are described below, but these examples are merely for explaining the content and do not limit the present invention.

(Example) As a knitting machine, a milling circular knitting machine (manufactured by Gunze Co., Ltd.) having a kettle diameter of 227 mm, a knitting structure using the Milan rib changing knitting structure shown in FIG. 210
100 denier (34 filaments) nylon 66 fiber (promiran, manufactured by Toray Industries, Inc.) in the Z direction
A yarn with a low twist of m / m is used.
Align 3 strands of 2880 denier (3,000 filaments) carbon fiber (trade name: Toray Industries, Inc., trade name M50B) with 100 turns / m twist in the S direction as a bottom twist, and further as a top twist Knitting was carried out in the manner shown in FIG. 2 by using yarns twisted at 100 turns / m in the Z direction and inserting the reinforcing material yarns 5 in the course direction into 10 yarns / cm.

As a result, the basis weight was 784 g / m ² and the content of the reinforcing yarn was 2
9,5% of the cyclic reinforcement was obtained.

(Effects) According to the present invention, as described above, after knitting the reinforcing yarn several courses, knitting the reinforcing material yarn by inserting one course is knitted as one repeat, and the content of the reinforcing yarn is 0.1. ~ 70
%, (1) the reinforcing thread is inserted and knitted in a straight line without bending, and is completely covered with the reinforcing cloth. It is possible to obtain an annular reinforcing material which does not shatter, has excellent friction resistance and strength, and is suitable for belts such as timing belts.

(2) Since it is not necessary to bond the reinforcing yarns to each other via a resin as in the conventional case, the annular reinforcing material itself is flexible and easy to handle, and workability is attained in that any resin can be used. Is excellent.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention. FIG. 1 is a perspective view showing a partial cross section of an annular reinforcing material, FIG. 2 is a knitting diagram for knitting an annular reinforcing material, and FIGS. It is a knitting diagram showing another example of knitting a reinforcing material. 1 ... cloth for reinforcement 5 ... yarn for reinforcement

Claims (1)

(57) [Claims] After knitting a reinforcing yarn for several courses, knitting of a reinforcing material yarn for one course is knitted as one repeat, and the content of the reinforcing yarn is 0.1 to 70%. An annular reinforcing material characterized by having such a configuration.