JPS6336243B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a carpet cutting method, and more particularly to a method for cutting carpet tiles of a certain size from a wide and long carpet material.

Carpets are generally laid in long lengths, but because they are bulky, it is inconvenient to transport or bring them to the installation site, and it is not possible to replace parts of the carpet if they are damaged.
Carpet tiles, which can be cut to a certain size such as 50 cm and laid in the form of tiles, have come into use.

By the way, for carpet tiles whose surface is made of pile, the straightness and parallelism of the cut edges are important, but if you do not make the balancing part inconspicuous when laying the tiles, the joints that will appear when the tiles are laid are The balance part appears like this, and it is not possible to express the luxurious feel of a single piece of carpet.

Figure 1 shows the most common example of carpet cutting, in which a raw carpet A with a bail 2 provided on the top surface of a base 1 is run by a conveyor, chain, or roller. The carpet tile is cut out by heating at a desired cutting position, using a heater or hot air, and cutting the heated portion with a disc-shaped rotary blade 3.

Although the details of the carpet A are not shown in the drawing, the base 1 of the carpet A is lined with a thermoplastic layer such as coal tar, and the lower part of the loops, cuts, and fibrous piles 2 is embedded in the coal tar layer. A structure in which the pile 2 is fixed on a layer of coal tar, or a structure in which a base fabric on which the pile 2 is planted is adhesively fixed on a coal tar layer, etc., are adopted.

Further, the rotary cutter 3 has a structure in which a sharp cutting edge is provided on the outer periphery of a disk, and the disk has an appropriate thickness.

Therefore, the heated part of the base 1 is heated by the rotary knife 3.
When the carpet is cut as shown in the figure, the cut surface of the carpet is compressed on both sides by the biting thickness of the cutter 3, and becomes an inclined surface conforming to the side shape of the cutter 3 due to plastic deformation due to heating.

That is, the disc-shaped blade 3 has a cutting edge around its periphery, and in order to maintain strength, the wall gradually becomes thicker from the blade edge to the center, and both sides are inclined. The cut surface of carpet A becomes an inclined surface that widens at the bottom.

When the carpet tile B thus cut is laid on the floor surface, as shown in Fig. 2, a gap portion 4 is generated where the lower part contacts the adjacent tile and the upper part widens, as shown in Fig. 2. No. 4 has a problem in that the density of the pile becomes coarse and the voids appear like joints when viewed from above, making it impossible to express the luxurious image of a single piece.

This invention was made to solve the above problems, and the cut edge of the carpet is
To provide a cutting method that does not create a gap on the upper surface of the balancing part when laying, the pile density in the balancing part is dense, the butting part is not noticeable, and the whole can be laid as if it were a single piece. It is a purpose.

In order to achieve the above object, the present invention provides a disc-shaped rotary blade for moving a carpet with piles provided on the surface of a base and cutting into the carpet from the back side of the base; Cut along the moving direction with a receiving blade that supports the pile surface on both sides, and during cutting, the receiving blade is rotated so that its peripheral speed changes with the moving speed of the carpet, and the pile that comes into contact with the receiving blade is cut along the moving direction. The structure is such that the direction is aligned with the moving direction of the carpet.

The present invention will be explained below based on the embodiments shown in FIGS. 3 to 5.

The carpet A is sent forward by a conveying device such as a chain, belt, roller, guide ruler, etc. with the surface on which the pile 2 is provided facing downward, and this carpet A is transported forward by a cutting device 11 disposed on the way.
is cut in a straight line along the direction of movement.

The cutting device 11 includes a disc-shaped rotary blade 12 that cuts into the carpet A from above, a pair of receiving blades 13, 13 that support the surface of the pile 2 on both sides of the rotary blade 12 at the bottom of the carpet A, and A
The receiving blade 13,
13, and a heating mechanism 15, such as a thermocircular heater, which is placed at a position immediately before cutting by the rotary knife 12 and heats the cutting position of the base 1. Although not shown, the cut end face C of the carpet A is guided by a guide.

As described above, the rotary cutter 12 is formed with sloped surfaces 16 on both sides that become thicker from the cutting edge on the outer periphery toward the center of rotation, and also has receiving blades 13, 13.
is in the shape of a disc attached to the rotating shaft 17, and the opposing surfaces thereof are concave surfaces to form a space 18 therebetween, and the lower tip of the rotary cutter 12 is held on both sides at the outer peripheral edge that forms an acute angle. It is arranged so that it is sandwiched between the two sides.

Both receiving blades 13, 13 are rotationally driven so that their circumferential speeds are either faster or slower than the moving speed of the carpet A.

As shown in Fig. 3, the receiving blades 13, 13 contact and support the two pile surfaces immediately before the carpet is cut by the rotary blade 12, so the difference between the moving speed of the carpet A and the circumferential speed Tsute pile 2
The falling direction of the carpet A is along the moving direction of the carpet A, and the pile cutting conditions when cutting with the rotary knife 12 are constant.

That is, if the circumferential speed of the receiving blades 13, 13 is faster than the moving speed, the pile 2 will fall forward in the moving direction, and conversely, if the circumferential speed is slow, it will fall backwards, making it difficult to cut the pile 2 at the cut point when the blade 12 cuts the pile 2. This prevents the pile density in the balancing area from becoming coarse or uneven during installation.

Incidentally, a dust removal hole 19 is provided in the receiving blades 13, 13, so that chips generated during cutting are discharged from the space 18 to the outside.

The pressure adjusting roll 14 is arranged directly above the receiving blades 13, 13 on both sides of the rotary knife 12, and the receiving blade 13 maintains the cutting position of the carpet A with the knife 12.

The cutting method of the present invention is carried out using the above-mentioned cutting device, in which the carpet A is moved with the pile 2 facing downward and the bottom of the base 1 facing upward, and first The position where the base 1 is to be cut is heated by the heating mechanism 15 to soften the base 1.

Next, the carpet A is held between the receiving blades 13, 13 and the pressure adjusting rolls 14, 14, and the held portion is cut by the rotating blade 12. At this time, knife 1
It is preferable to rotate the blade so that the circumferential speed of the blade A is faster than the moving speed of the carpet A in order to improve the cutting quality.

The rotary knife 12 cuts the softened portion of the base 1 due to heating with receiving blades 13, 13. At this time, both sides of the blade 12 are sloped surfaces 16, and as the blade 12 bites into the base 1, the heated and softened cut end surface is deformed to match the shape of the slope 16, and the base 1 The upper surface side on which the pile 2 is provided is finished as an inclined surface projecting outward.

In addition, the pile 2 at the cutting position has a receiving blade 13,
13 so as to be tilted parallel to the direction of movement, and as a result, the cutting of the pile 2 by the blade 12 can be kept to the minimum necessary.

Carpet tile B is completed by cutting the four peripheral edges using the cutting method described above.

When the cut carpet tile B is laid on the floor, its abutting edge will touch the base 1, as shown in Figure 5.
The upper parts of the piles 2 are joined to each other and there are no gaps, and the density of the pile 2 in the abutting parts is uniform throughout, making the abutting parts inconspicuous when viewed from above.

As described above, according to the present invention, the carpet is cut from the back side of the base using the rotary blade, so that the cut end surface of the carpet is finished as an inclined surface that protrudes outward toward the upper pile surface. When the carpet is laid, the upper part of the base is joined at the abutting part, and no gap is generated, and the density of the pile surface is uniform throughout, making it possible to obtain a carpet tile in which the abutting part is not noticeable.

In addition, the pile surface is supported by receiving blades at positions on both sides of the rotating blade, and the circumferential speed of the receiving blade is changed to the moving speed of the carpet, and the pile is cut in the direction of carpet movement, so the rotating blade There is no need to cut the pile unnecessarily, and there is no reduction in pile density at the cut end.

Furthermore, the uniform density of the pile at the abutting portions allows cutting of carpet tiles that can be laid and used in the same manner as a single piece, making it possible to put carpet tiles into practical use.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing conventional carpet cutting, Fig. 2 is a longitudinal cross-sectional view showing the laid state of carpet tiles obtained by the same cutting method, and Fig. 3 is a longitudinal cross-sectional view showing the cutting method of the present invention. FIG. 4 is a side view, FIG. 4 is an enlarged longitudinal sectional front view of the same, and FIG. 5 is a sectional view showing the state of laying carpet tiles obtained by the cutting method described above. A... Carpet, 1... Base, 2... Pile, 11... Cutting device, 12... Rotating blade, 13
...Receiving blade, 14...Pressure adjustment roll, 15...Heating mechanism.

Claims (1)

[Claims] 1. A carpet with piles provided on the surface of the base is moved, and the carpet is cut into the carpet from the back side of the base using a disc-shaped rotary blade and a blade on both sides sandwiching the rotary blade. Cut along the moving direction with a receiving blade that supports the pile surface, and during cutting, rotate the receiving blade so that its circumferential speed changes with the moving speed of the carpet, and change the direction of the pile in contact with the receiving blade to match the movement of the carpet. A method for cutting carpet, which is characterized in that the carpet is aligned in the same direction. 2. Using a rotary knife whose sides are formed with inclined surfaces that gradually become thicker from the cutting edge on the outer periphery toward the center of rotation, cut the base so that the cut end surface of the base becomes an inclined surface that protrudes from the back side toward the pile side. A method for cutting a carpet according to claim 1.