JPH0435154Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for widening a reticulated web such as a split fiber web obtained by splitting a stretched plastic film.

[Conventional technology]

Conventionally, this main reticular web widening device is disclosed in, for example, Japanese Patent Publication No. 46-43275 or Japanese Patent Application Laid-Open No. 48-67557. These devices widen the unwidened net web on the outgoing path of the circulating circuit, with the outgoing path being unwidened and the return path being unnarrowed. The position at which the widened reticulated web is supplied and the position at which the expanded reticulated web is removed from the circuit were fixed.

[Problem that the invention attempts to solve]

In the above-mentioned conventional mesh web widening device, since the supply position of the unwidened mesh web onto the circuit and the position where the widened mesh web is removed from the circuit are fixed, the magnification for widening the mesh web is determined by the device. It was fixed for each. Therefore, in order to obtain several types of reticular webs widened at different magnifications, it is necessary to prepare a number of devices corresponding to the number of desired widening magnifications, which is disadvantageous in terms of cost.

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned problems and provide a reticular web widening device that can widen reticular webs at various magnifications with a single device.

[Means for solving problems]

The means of the present invention for solving the above-mentioned problems consists of a circuit for supporting an unexpanded reticular web and widening it during conveyance, which circulates with the outgoing path unwidened and the return path unnarrowed; It consists of a supply roller for supplying an unexpanded reticular web onto the outgoing path and a take-up roller for taking up the expanded reticular web from the circuit, and at least one of the supply roller and the take-up roller is moved back and forth along the outgoing path. It is characterized by being configured so that it can be moved and fixed at a desired position. The position of the supply roller or take-up roller can be moved and fixed, for example, by moving the supply roller or take-up roller to the other end of an arm, one end of which is rotatably attached to the fixed shaft of a cage-type roller as described below, which constitutes a circulation circuit. This can be done by supporting the shaft, rotating the arm to a desired position, and fixing it.

[Effect]

Since the device of this invention is configured as described above, in a device that can widen the reticular web by, for example, four times during the entire reciprocating stroke of the circulation circuit, the supply roll can be moved anywhere between the starting point and the midpoint of the outward path. If the width of the reticular web can be widened at any magnification between, for example, 2 times and 4 times, there is no need to use a different device for each different widening magnification.

〔Example〕

Next, the present invention will be described by way of examples with reference to the drawings. FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.
FIG. 2 is a detailed view of a portion of FIG. 1, and FIG. 3 is a cross-sectional view of an embodiment of the present invention. In these figures, the circulation circuit 2 of the reticular web widening device 1 of the present invention is shown.
A large number of coil springs 4, each having a shaft 3 passed through them, are arranged parallel to each other in a substantially cylindrical shape, and both ends of each shaft 3 are fixed to two left and right discs 5, 5' to form a cage-type roller. It is rotated around a fixed shaft 6 parallel to the mandrel 3 by two left and right sprocket wheels 7, 7'. Inside the circulation circuit 2, a drum 8 with a circular cross section is fixed to a fixed shaft 6, and left and right cam tracks 9, 9' are formed at both ends of the drum 8, and are attached to both ends of each coil spring 4. stopper 10,1
0' foot 11 is slidably engaged with the cam tracks 9, 9', and the cam tracks are guided along the cam tracks 9, 9'.
Here, the coil spring 4 is guided by the cam tracks 9, 9' so that the outward path is not widened and the return path is not narrowed.

A supply roller 12 parallel to the fixed shaft 6 is arranged above the circulation circuit 2, and a take-up roller 13 parallel to the fixed shaft 6 is arranged below the circulation circuit 2. The supply roller 12 is configured so that its axis can be moved in parallel along the outgoing path as shown by a broken line 12a. That is, the shaft of the supply roller 12 is supported by arms 14, 14' whose one end is rotatably attached to the fixed shaft 6 of the circulation circuit 2 and fixed at a desired position. The position of the supply roller 12 is moved by automatically moving the roller 14' to a desired position. The take-up roller 13 is also the arm 1
4, 14' may be configured to be movable by arms 15, 15' having the same structure.

In the width expanding device 1 described above, the unexpanded net web 16 is supplied onto the circulation circuit 2 by the supply roller 12, as shown by arrow P, and is engaged with the coil spring 4. The net-like web 16 is configured such that the coil springs 4 of the circulation circuit 2 are not widened on the outward path and are not narrowed on the return path, so that when the circulation circuit 2 rotates, the width of the coil springs 4 is expanded and contracted. To change the widening magnification of the mesh web 16, move the supply roller 12 to position 12a (Fig. 3).
The width is widened between the two, and the widening magnification is easily changed. The widened net-like web 16 advances as shown by arrows Q and R and is taken off by the take-off roller 13.

[Effect of idea]

As explained above, the present invention makes it possible to move at least one of the supply roller that supplies the net web to the circulation circuit of the net web widening device and the take-up roller that takes over the net web, thereby improving the circulation circuit. By arranging the supply roll so as to supply the reticulated web to an arbitrary position on the outward path, the reticulated web can be widened at an arbitrary magnification. The same effect can also be achieved by moving the position of the take-up roll. That is, it is possible to change the width expansion ratio of the reticulated web using one width expansion device, and there is no need to install a plurality of devices with different width expansion ratios.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention, FIG. 2 is a detailed partial view of FIG. 1, and FIG. 3 is a cross-sectional view of an embodiment of the present invention. 1... Reticular web widening device, 2... Circulation circuit,
3... Mandrel, 4... Coil spring, 5, 5'... Disc, 6... Fixed shaft, 7, 7'... Sprocket wheel, 8... Drum, 9, 9'... Cam orbit,
10, 10'... Stop, 11... Leg, 12... Supply roller, 13... Take-up roller, 14, 14'
...Arm, 15, 15'...Arm, 16...
Reticulated web.

Claims (1)

[Scope of utility model registration request] This is a width widening device that expands the net web 16 to a desired width while traveling in the length direction, and widens at the end on the outward path and narrows on the return path as it circulates.It supports the net web 16 and widens it while being conveyed. It consists of a circulation circuit 2, a supply roller 12 for supplying the unexpanded reticular web onto the outgoing path of the circuit, and a take-up roller 13 for taking up the expanded reticular web 16 from the circuit. A reticular web widening device with a variable widening magnification, characterized in that the position of one of the roller 12 and the take-up roller 13 can be changed back and forth along the outgoing path.