JPH02117565A - Tension regulating device - Google Patents

Abstract

PURPOSE:To enable application of desired tension on a fiber material by providing a pair of delivery catapillers which nip a binder-impregnated braid fiber material therebetween and delivers it in a take-off direction at a delivery speed lower than a take-off speed. CONSTITUTION:A binder-impregnated braid fiber material 3 is nipped between links 2 of a pair of delivery catapillars 1. With this state, the fiber material is delivered in a take-off direction at a delivery speed lower than a given take- off speed. In this case, desired tension is applied on the binder-impregnated braid fiber material 3 at a speed difference between the two speeds, and under a state in which tension is exerted, the fiber material 3 is cured.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to reinforcing materials used to strengthen the tensile strength of structures by being embedded in structural materials with low tensile strength, such as concrete and plastics. Structural materials used as a substitute for reinforcing bars or as a substitute for PC steel wires, more specifically, for example, the thin wires disclosed in JP-A No. 61-290150 are knitted into a braid shape, and the thin wires are bonded with a binder. for adjusting the tension of the binder-impregnated braided fibers in order to harden the binder-impregnated braided fibers under a desired tension when manufacturing a structural material made by bonding them together. This invention relates to a tension adjustment device.

(Prior Art) Conventionally, in order to apply a desired tension to a binder-impregnated braided fiber body,
As shown in Figure 6, the binder-impregnated braided fiber body a, which is taken off at a predetermined take-up speed, is wound around a fixed roll b, and the frictional force is used to apply a desired tension to the binder-impregnated braided fiber body a. . In the figure, C is an auxiliary roll, and d is a support member for the fixed roll b and the auxiliary roll C.

(Problems to be Solved by the Invention) However, since the conventional method of applying tension to the binder-impregnated braided fiber body a is simply winding the binder-impregnated braided fiber body a around a fixed roll b, The binder-impregnated braid fiber body a, which has a small frictional resistance due to the binder exuding on the surface, slips between it and the fixed roll b, and not only is it impossible to apply the desired tension, but also the binder-impregnated braid mff1
If the body is not flexible, such as a glass fiber body, there are problems such as thread breakage occurring when the body is wound around the fixed roll C.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a tension adjustment device capable of applying a desired tension to a binder-impregnated braided fiber body.

(Means for Solving the Problems) The tension adjustment device of the present invention is a tension adjustment device that applies a desired tension to a binder-impregnated braided fiber body that is taken at a predetermined take-up speed. It is characterized by a pair of feed-out caterpillars that sandwich and feed out in the take-up direction at a feed-out speed slower than the take-up speed.

Further, if each link of the feeding caterpillar is configured to have a rubber plate on its outer surface, the feeding caterpillar can be
This increases the frictional force of the binder-impregnated braided fiber body, making it easier to adjust the tension to a predetermined value.

Furthermore, if each link of the feeding caterpillar is configured to have an endless rubber plate over its entire outer periphery, not only will the frictional force between the feeding caterpillar and the binder-impregnated braided fiber body be increased, but also a flat continuous The binder-impregnated braided fabric can be guided on the surface.

Furthermore, if the rubber plate is configured to have a concave groove along the take-up direction, the contact area between the feed-out caterpillar and the binder-impregnated braided fiber body becomes large, which not only increases the frictional force but also increases the frictional force. The binder-impregnated braided fiber body is guided in a surrounded manner over its entire circumference and is not distorted during guidance.

Furthermore, if the two feed-out caterpillars are arranged at intervals that are gradually narrowed toward the take-up direction, the binder-impregnated braided fiber body will be gradually held between the two feed-out caterpillars, The braided fiber body does not become distorted.

Incidentally, the feeding caterpillar may be arranged vertically.

(Function) The binder-impregnated braided fiber body is held between a pair of feed-out caterpillars, and in that state, it is paid out in the take-up direction at a pay-out speed slower than the take-up speed, and the binder-impregnated braid is drawn out by the speed difference. The fibrous body is subjected to the desired tension.

(Example) Hereinafter, an example of the tension adjusting device of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows one embodiment of the tension adjusting device of the present invention, and in the figure,
1 shows a feeding caterpillar provided with a plurality of links 2.

A pair of feed-out caterpillars 1 are arranged one above the other so that their respective links 2 face each other, and the distance S between the two feed-out caterpillars 1 is slightly narrower than the diameter of the binder-impregnated braided fiber body 3. The binder-impregnated braided fibers 3 are held at equal intervals and are fed out at a slower speed than a predetermined take-up speed while being held between the links 2 of both feed-out caterpillars 1. It was made to be picked up in the picking direction A.

In the figure, reference numeral 4 indicates a drive source such as a motor for rotating the feeding caterpillar 1, 5 indicates a spacing adjustment device such as an air cylinder arranged above the feeding caterpillar 1, and 6 indicates a support member for the spacing adjustment device 5. , 7 are support members for the lower feeding caterpillar 1.

A tension adjusting device having such a structure applies a desired tension to the binder-impregnated braided fiber body 3, which is made by knitting fine wires such as aromatic polyamide fibers into a braided cord shape and impregnated the binder-impregnated braided fiber body 3 with a binder such as epoxy resin. To do this, first, the distance adjusting device 5 is operated upward to raise the upper feeding caterpillar 1 to widen the gap S between them, and the binder braided fibers are placed between both feeding caterpillars 1 with the gap S widened. The body 3 is inserted, and then the spacing adjustment device 5 is operated downward to lower the upper feeding caterpillar 1, narrowing the gap S between them to equal intervals, and allowing each link 2 of both feeding caterpillars 1 to The binder braided fiber body 3 is sandwiched. Next, when the binder braided fiber body 3 is taken up at a predetermined take-up speed by a take-off device (not shown) disposed on the upstream side in the take-up direction A, the feed-out caterpillar whose pay-out speed is slower than the take-up speed is set. 1 causes tension to be applied to the binder-impregnated braided fiber body 3. Incidentally, the magnitude of the tension applied to the binder-impregnated braided fiber body 3 is appropriately selected by adjusting the feeding speed of the feeding Kitapira-1.

FIG. 2 shows a modification of the feeding caterpillar 1 of the present invention,
A rubber plate 8 is attached to the outer surface of each link 2 of the feeding caterpillar 1.
It is equipped with the following.

FIG. 3 shows another modification of the feed-out caterpillar 1 of the present invention, in which an endless rubber plate 8 is provided over the entire outer periphery of each link 2 of the feed-out caterpillar 1.

In the examples illustrated in FIGS. 2 and 3, the feeding caterpillar 1
The rubber plate 8 provided on the outer surface of the link 2 was formed to have a flat surface, but as shown in FIG. Good too.

In the embodiment described above, the pair of feeding caterpillars 1 were arranged so that the distance S between them was equal, but as shown in the fifth figure, the spacing S+ between the feeding caterpillars 1 on the downstream side in the take-up direction A was changed. The distance s between both feed-out caterpillars 1 on the upstream side in the take-up direction A is slightly wider than the diameter of the binder-impregnated braided fiber body 3.
2 may be made narrower than the diameter of the binder-impregnated braided fiber body 3, and the spacing S may be arranged so as to be gradually narrowed toward the take-up direction.

In the illustrated example, the pair of feeding caterpillars 1 are arranged horizontally in parallel, but the feeding caterpillars 1 may be arranged vertically in parallel.

(Effects of the Invention) As described above, according to the tension adjusting device of the present invention, a pair of feeding caterpillars which sandwich the binder-impregnated braided fiber body and feed it out in the take-up direction at a pay-out speed slower than the take-up speed are formed. Therefore, the binder-impregnated braided fiber body is fed out in a straight line while being held between both feed-out caterpillars, and the desired tension can be applied to the binder-impregnated braided fiber body by the difference in speed between the two feed-out caterpillars.

Further, when each link of the feeding caterpillar is configured to have a rubber plate on the outside thereof, the feeding caterpillar
Since the frictional force of the binder-impregnated braided fiber body is increased, the anti-slip effect of the binder-impregnated braided fiber body is improved, and the tension on the binder-impregnated braided fiber body can be easily adjusted.

Furthermore, when each link of the feeding caterpillar is provided with an endless rubber plate over its entire outer periphery, the frictional force between the feeding caterpillar and the binder-impregnated braided fiber body is not only increased, but also a flat The binder-impregnated braided fiber body can be reliably held on the continuous surface and guided in the take-off direction.

In addition, when the rubber plate is configured to include grooves along the take-up direction, not only does the contact area between the binder-impregnated braided fiber body and the rubber plate increase, and the frictional force increases;
Since the binder-impregnated braided fibrous body is guided in a state in which the entire circumference is surrounded by the groove, the binder-impregnated braided fibrous body is not distorted during guidance.

Furthermore, when the distance between the two feed-out caterpillars is gradually narrowed toward the take-up direction, the binder-impregnated braided fiber body is gradually held between the two feed-out caterpillars, so that the binder The impregnated braided fiber body does not become distorted.

Furthermore, when the feeding caterpillar is arranged vertically,
The binder exuding from the surface of the binder-impregnated braided fiber body due to the pinching pressure of the caterpillar does not fall directly downward and adhere to the caterpillar.

[Brief explanation of drawings]

Fig. 1 is a perspective view of one embodiment of the tension adjusting device of the present invention;
The figure is a cross-sectional view of a link showing a modified example of the feeding caterpillar, FIG. 3 is a perspective view showing another modification of the feeding caterpillar, and FIG. FIG. 5 is an explanatory side view of another embodiment, and FIG. 6 is a front view of a conventional device. 1... Feeding caterpillar 2... Link 3... Binder-impregnated braided fiber body 8... Rubber plate 9... Concave full
A... Pick-up direction S... Spacing diagram No. 61! i

Claims (1)

[Scope of Claims] 1. A tension adjustment device that applies a desired tension to a binder-impregnated braided fiber body that is taken off at a predetermined take-off speed, the tension adjusting device applying a desired tension to a binder-impregnated braided fiber body that is taken off at a predetermined take-off speed. A tension adjustment device comprising a pair of feed-out caterpillars that feed out in a take-up direction at a slow feed-out speed. 2. The tension adjustment device according to claim 1, wherein each link of the feeding caterpillar is provided with a rubber plate on its outer surface. 3. The tension adjustment device according to claim 1, wherein each link of the feeding caterpillar is provided with an endless rubber plate over its entire outer circumference. 4. The tension adjustment device according to claim 2 or 3, wherein the rubber plate is provided with a concave groove along the take-up direction. 5. The tension adjustment according to any one of claims 1 to 4, characterized in that the feeding caterpillars are arranged such that the interval between the two caterpillars is gradually narrowed toward the take-up direction. Device. 6. The tension adjustment device according to any one of claims 1 to 5, wherein the feeding caterpillar is arranged vertically.