JPS6357197B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a carpet cutting method and a cutting device for producing square carpet tiles.

Carpets are generally installed in long lengths, but they are inconvenient to transport and bring to the installation site.
The disadvantage is that it is not possible to partially replace damaged parts. In order to overcome this drawback, square carpet tiles have recently been proposed which are cut to a certain size in advance and can be laid in the form of tiles.

This carpet tile is manufactured by cutting out a large carpet base fabric.

During this production, the carpet tiles are cut out.
The carpet is cut with a knife placed in a fixed position while moving the carpet fabric, and the straightness and parallelism of the cut edges are extremely important.

That is, if the cut edge of the carpet tile is curved or the parallelism accuracy is poor, there are problems such as gaps occurring during laying, uneven color patterns, and bends at the joints, resulting in an unsightly appearance. Therefore, unless the straightness and parallelism accuracy of the cut edge is high, the commercial value will be low.

The most basic method for conventional cutting of carpet tiles is to mechanically feed the carpet base fabric and cut the carpet base fabric with a blade placed at a fixed position.

However, when feeding carpet fabric in a straight line mechanically, it is difficult to achieve straight line accuracy due to the assembly accuracy, errors, and looseness of the conveying device. Can't get carpet tiles.

For this reason, it has been considered to use a guide at the same time as cutting with a knife to improve cutting accuracy.

This cutting method first moves the carpet base fabric and cuts one side edge with a knife, then slides this cut edge on a guide and cuts the other side edge, and then cuts the cut edge on both sides. This is to cut the middle part while guiding it with a guide.

The cutting method described above is not only inefficient because it requires three steps to cut one side edge, the other side edge, and the middle part, but also because the first cut is made by the above-mentioned conveying device and cutter. There is also a problem with accuracy because the reference cutting edge is likely to bend, and this affects the entire process.

This invention has been made in view of the above-mentioned points, and includes simultaneously cutting and guiding both side edges of a carpet base fabric using a disc-shaped first blade,
Immediately after that, both cutting edges are guided by a guide, and the disc-shaped second knife cuts at a position where the cutting force of the first knife is not applied, resulting in carpet tiles with excellent straightness and parallelism. The purpose of the present invention is to provide a cutting method and a cutting device that can obtain the following results.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings showing embodiments thereof.

As shown in the figure, the carpet base fabric A is formed to a size from which a plurality of carpet tiles B can be cut out. For example, one side of this carpet base fabric A is 1100 mm.
is the size of a square, and from this,
Four square carpet tiles B each 500 mm on a side are cut out. The carpet base fabric A may have a pile on its upper surface, a coal tar layer, or the like.

The carpet base fabric A is conveyed by a conveying device toward the table 1 in front, and a pair of first blades 2 are placed on both side edges of the carpet base fabric A on the same perpendicular line to the conveyance direction immediately before the table 1. are arranged, and both side edges of the carpet base fabric A are cut by this knife 2.

This first knife 2 uses a disc knife and cuts both sides of the carpet base fabric A at the same time using a receiving blade located at the bottom of the carpet base fabric A to have a width equivalent to two tiles B. .

Although not shown in the drawings, the conveyance device may employ a linear conveyance mechanism such as a chain or a belt conveyor.

Immediately after the first blades 2 on both sides, a guide 3 is arranged along the moving direction of the carpet base fabric A to guide the cut edge of the carpet base fabric A while slidingly contacting the same. By the guidance of the both-side guides 3, the cut edge moves in the cutting line direction and at the same time is prevented from moving in the left-right width direction, so that both sides of the carpet base fabric A are finished in parallel straight lines.

A second knife 4 is disposed at the center in the width direction of the carpet base fabric A in front of the first knife 2 in the carpet moving direction, so that the first knife 2 divides the carpet base fabric A after cutting into two equal widths. It's summery. The second knife 4 is also disc-shaped like the first knife 2 and cuts the carpet base fabric A in cooperation with the lower knife.

Also, the distance l from the first cutter 2 to the second cutter 4
is set to be longer than the length of one side of the carpet tile B. The reason for this setting is that carpet tile B is usually a square with a side of 300 to 500 mm.
This is because we have found through experiments that the influence of the cutting force by the disc-shaped blade 2 disappears when the distance is longer than this length of one side.With this setting, the cutting force of the first blade 2 on the carpet base fabric is not applied. Second
The cutter 4 will be used to cut.

That is, when both edges of the carpet base fabric A are cut with the first knife 2, the carpet base fabric A is compressed from both sides by the thickness of the knife 2, and this force acts on the entire width direction. If the second knife is used to cut while this force is being applied, the carpet base fabric A will be further compressed by the amount of the cut made by the second knife 4, and there will be no place for the force to escape, causing the carpet base fabric to bend. cutting accuracy decreases. However, at the position at the above-mentioned distance l from the first knife 2, the cutting force caused by the first knife 2 has already been eliminated, and cutting by the second knife 4 does not cause any inconvenience.

The cutting device of the present invention has the above structure, and the cutting method will be explained next.

With the first and second cutters 2 and 4 rotated,
The carpet base fabric A is fed toward the first cutter 2 by the conveying device.

When unnecessary parts on both sides of the carpet fabric A are simultaneously cut by the first knife 2, the cut edges on both sides are immediately guided by the guide 3 and advance onto the table 1. The cutting of the carpet base fabric A by the first knife 2 is carried out by the guides 3 on both sides and the four-point support by the first knife 2, so that accurate cutting is performed from the beginning of the cutting.

When the cut carpet base fabric A advances by a distance l, the center in the width direction is cut by the second knife 4,
Carpet base fabric A is cut into two rectangular pieces.

Thereafter, the same cutting is performed while moving the carpet base fabric in a direction perpendicular to the above-mentioned cutting, thereby cutting out four square carpet tiles B as shown by the dashed lines in the figure.

As described above, according to the present invention, when a square carpet tile is cut and manufactured from a carpet base fabric, both side edges of the carpet base fabric that moves in a straight line are cut into two disk-shaped first tiles on the same perpendicular line to the direction of movement of the carpet base fabric. Cut with a knife, and immediately after cutting, slide the cut edges of the carpet base fabric on the guide to guide it, and cut the carpet in a circle at a position where the tip of the carpet base fabric has advanced beyond the length of one side of the carpet tile from the first knife. Since the second plate-shaped cutter cuts the widthwise center of the carpet base fabric, when the carpet base fabric is fed in, the first disk-shaped cutter cuts both edges of the carpet base fabric in the same manner without being pushed upward or downward. The carpet fabric is simultaneously cut in the width direction and guided by a guide, and then the carpet base fabric with its both side edges cut is guided by the guide in a straight line without swinging to the second knife, and the cutting force of the first knife is eliminated. At this position, the second cutter cuts the center and divides it into two equal parts.

Therefore, according to the present invention, cutting is more accurate and smoother than the conventional method.

[Brief explanation of drawings]

The drawing is a plan view of a cutting device according to the present invention. A...carpet base fabric, B...carpet tile, 1...table, 2...first cutlery, 3...guide, 4...second cutter.

Claims (1)

[Scope of Claims] 1. When cutting and producing a plurality of square carpet tiles from a carpet base fabric, both edges of the carpet base fabric moving in a straight line are cut with a disc-shaped first blade on the same perpendicular line to the direction of movement of the carpet base fabric. Immediately after cutting, both cut edges of the carpet base fabric are guided by sliding them on the guide, and at a position where the tip of the carpet base fabric has advanced beyond the length of one side of the carpet tile from the first cutter, it is cut into a disc shape. A carpet cutting method characterized by cutting the carpet base fabric at the center in the width direction with a second knife. 2. In an apparatus for cutting and manufacturing a plurality of square carpet tiles from a carpet base fabric, a first disk-shaped cutter is provided within both side edges of a carpet base fabric that moves in a straight line on the same perpendicular line to the direction of movement;
A guide in the direction of movement of the carpet base fabric is provided so as to be slidable from the first cutter along both cutting edges of the carpet base fabric; A carpet cutting device characterized in that a disk-shaped second blade is provided at the widthwise center of a carpet base fabric separated by a length or more.