JP3386888B2 - Guide roll for unit twisting machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide roll used in a unit twisting machine for manufacturing a communication cable, and particularly, it is preferably used in a unit twisting machine as an intermediate siding roll and a collecting roll. It

[0002]

2. Description of the Related Art FIG. 2 shows a schematic structure of a unit twisting machine used for manufacturing a communication cable. As illustrated, the communication cable is first connected to the oscillating device 10,
For example, 10 subunits SU are alternately twisted together. The subunit SU is composed of, for example, 10 pairs of core wires. Therefore, in the oscillating device 10, after alternately twisting, a coarse winding is performed by a taping head every 10 pairs, and thereafter,
This subunit SU includes an intermediate eye plate 20 having an intermediate eye plate roll 22 and a collective eye plate 30 having an aggregate roll 32.
It is sent to the assembly section (base) 40 through the assembly line 10
It is set to 0. The intermediate eye plate 20 and the aggregate eye plate 30 themselves are in a fixed state, and each roll attached to each eye plate rotates to guide each subunit SU toward the aggregate portion 40.

At this time, the subunits that pass through each eye plate are rotated (oscillate) alternately by the oscillating device 10 when they pass through the gathering portion 40, and this twist is twisted in the gathering portion 40. Presser winding device (not shown) provided immediately after
Fixed by.

[0004]

However, in the unit twisting machine having the above-described structure, even if the subunit SU is oscillated, the reversing action is not smoothly transmitted to the gathering portion 40, and the proper forward and reverse of the gathering line 100 is not achieved. There was a problem that the twist could not be obtained.

As a result of conducting a research experiment to solve this problem, the present inventor has a problem in the shape of the guide rolls such as the intermediate eye plate roll 22 and the collecting roll 32 provided in each eye plate 20 and 30. Found.

That is, the conventional guide roll of this type is
As shown in FIG. 1 (A), the shape of the groove formed on the outer peripheral surface of the roll is a curved surface having a radius R at the bottom and a U-shape that opens upward in cross section. So-called "U
It was called a "mold roll".

In such a U-shaped roll, the curvature (R) of the bottom of the groove is considerably larger than the radius r of the subunit SU. For example, for a subunit SU consisting of 10 pairs of strands with an outer diameter of 0.4 to 0.9 mm, U of R = 3.5 to 9 mm
Mold rolls are used. In such a U-shaped roll, the inner surface of the groove may be flat, and tension is applied to the subunit SU itself that passes through this roll, so that the quad array of the subunit SU tends to collapse into an elliptical shape. There is. In this crushed state, the reversal is not transmitted smoothly even if the oscillator is applied.

The present invention has been made on the basis of such novel knowledge.

Therefore, it is an object of the present invention to produce an assembly line having proper forward and reverse twists by smoothly transmitting the reversal action to the assembly when oscillating with a unit twisting machine. The purpose is to provide a guide roll for a unit twisting machine.

[0010]

The above object can be achieved by a guide roll for a unit twisting machine according to the present invention. In summary, according to the present invention, the groove formed on the outer peripheral surface of the roll has a U-shaped curved bottom portion having a predetermined radius in cross section, and an open groove portion opened upward from the bottom portion in a V shape. A guide roll for a unit twisting machine, which is formed by Such a guide roll is used as an intermediate siding roll and a collecting roll of a unit twisting machine.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The guide roll for a unit twisting machine according to the present invention will be described below in more detail with reference to the drawings.

FIG. 1B shows an embodiment of the guide roll 1 of the present invention which can be effectively used as the intermediate siding roll 22 and the collecting roll 32. According to this embodiment, in the guide roll 1 of the present invention, the groove 2 formed on the outer peripheral surface of the roll has a curved bottom portion 2 having a predetermined radius R ′ in cross section.
And an open groove portion 4 which is opened in a V shape upward from the bottom portion 2. That is, the guide roll 1 of the present invention is different from the conventional "U-shaped roll" in that
It can be called a "UV type roll".

In such a UV type roll 1 of the present invention, the radius R'of the curved surface of the inner bottom portion 2 of the groove is substantially the same as the radius r of the subunit SU, and as described above, for example, the subunit SU. Is about R '= 3.5 mm when it is composed of 10 pairs using a wire having a diameter of 0.4 to 0.9 mm.

Of course, the most preferable values are appropriately selected for the dimensions of each part of the UV type roll 1 of the present invention in accordance with the intended use.

The guide roll 1 having the above-mentioned structure was used as the intermediate eye plate roll 22 and the collecting roll 32, but since the size of R'is substantially equal to the radius of the subunit SU, the round shape is maintained, and therefore the subunit SU. It did not collapse, and the quad array disorder in the subunit was reduced, and the transmission of oscillate was improved.

[0016]

As described above, in the guide roll of the present invention, the groove formed on the outer peripheral surface of the roll has a cross section of
Since it is formed by a U-shaped curved bottom having a predetermined radius R'and an open groove opening upward from this bottom in a V-shape, when oscillated by a unit twisting machine, The reversing action is smoothly transmitted to the gathering portion, whereby a gathering line with proper forward and reverse twists can be manufactured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a conventional guide roll (FIG. 1 (A)) and a guide roll of the present invention (FIG. 1 (B)).

FIG. 2 is a schematic configuration diagram of a unit twisting machine to which the guide roll of the present invention can be applied.

Claims (2)

(57) [Claims] 1. A U-shaped curved bottom portion having a groove formed on the outer peripheral surface of the roll and having a radius substantially equal to the radius of a sub-unit through which the groove passes, and a V-shaped groove extending upward from the bottom portion.
A guide roll for a unit twisting machine, which is formed by an open groove portion that is open in a V shape. 2. The guide roll for a unit twisting machine according to claim 1, which is used as an intermediate siding roll and a collecting roll in the unit twisting machine.