JPS6352883B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for pressure forming a cut section of a carpet whose surface is formed of pile.

Carpets are generally installed in long lengths, but they are inconvenient to transport and bring to the installation site.
Recently, 50% of large carpets have been replaced in advance due to the disadvantage that partial replacement is not possible due to damage.
Carpet tiles, which can be cut to a certain size such as cm x 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 abutting parts inconspicuous when laying the tiles, the joints that will appear when the tiles are laid are The abutting parts appear 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 piles 2 provided on the top surface of a base 1 is run by a conveyor or rollers, and the desired cutting of the raw carpet is performed. The carpet tile is cut out by heating the position with a heater or hot air and cutting the heated part with a disc-shaped rotary knife 3.

Although the details of the carpet A are not shown in the drawing, the base 1 of the carpet A has a structure in which the back side of the coal tar layer is lined, and the lower part of the loop or cut pile 2 is embedded and fixed in the coal tar layer. Alternatively, a structure in which a base fabric with piles 2 planted thereon is adhesively fixed onto a coal tar layer is 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 cutting as shown in the figure, the cut edge of the carpet is compressed on both sides by the biting thickness of the blade 3, and the base 1
The relief due to compression appears as a protrusion 4 on the upper surface side.

When the upper surface side of the cut edge of the carpet becomes a protrusion 4 and is inclined, the pile 2a of the protrusion 4 falls inward and inclines as shown in FIG.

When such cut carpet tiles are laid on a floor surface as shown in Fig. 2, the piles 2a are inclined in opposite directions at the portions where they meet adjacent tiles.
A wide void portion 5 occurs directly above the abutting portion, and this void portion 5 is coarser than the density of the pile, so when viewed from above, the void portion 5 appears like a joint, expressing the luxurious image of a single piece. You will not be able to do so.

This invention was made to solve the above-mentioned problems that occurred when cutting carpet, and it eliminates the inclination of the pile toward the inside at the cut edge of the carpet, making it easier to lay the pile on the floor. The object of the present invention is to provide a method for forming a cut part in which the abutting part is not noticeable and the entire part can be laid out in the image of a single piece.

In order to achieve the above-mentioned object, the present invention moves a carpet with piles provided on the upper surface of a thermoplastic base, and while the carpet is being moved, a heating mechanism, a cutting blade, and pressure on the cutting edge are connected. The rollers are arranged in sequence, the moved carpet is heated by a heating mechanism, the heated part of the carpet is then cut with a knife along the moving direction, and the cut end of the carpet is cut with a pressure roller at the position after cutting. Pressure is applied from the top, and the surface of the base is pressure-formed downward toward the cut edge side by utilizing the thermal deformation caused by heating in the heating mechanism by applying pressure with this pressure roller. It is composed of

The present invention will be explained below based on the embodiments shown in FIGS. 3 to 6.

Figures 3 and 4 are the first part of the carpet A forming machine.
An example is shown in which, while carpet A is moving,
A heating mechanism 11, a rotary cutter 3 for cutting, and a cutting edge forming device 12 are arranged in this order.

The rotary knife 3 is similar to that shown in FIG. 1, and is used to cut the heated portion of the moving carpet A into a straight line.

As shown in FIG. 4, the forming device 12 includes a rotating roller 13 that supports the carpet A, a guide ring 14 fixed to the rotating roller 13 to hold the cut end surface of the carpet A in a fixed position, and a guide ring 14 that supports the carpet A. It is comprised of a pressure roller 15 that presses the cut end directly above the rotating roller 13.

The guide ring 14 has an annular recessed portion 16 on one side, and one side of the root portion that fits into the rotating roller 13 serves as a guide surface 17.

The pressure roller 15 is formed in the shape of a truncated cone, and is attached to an inclined shaft 18 so that the lower part of the circumferential surface is in pressure contact with the carpet A, and the lower large diameter side fits into the recess of the guide ring 14, as shown in FIG. It has entered the entry section 16.

The outer peripheral surface of the pressure roller 15 is shaped such that the small diameter side gradually separates from the surface of the carpet A so that the cut end can be effectively pressed at a position closer to the large diameter side.

In addition, in FIG. 3, the molding device 12 is arranged in the front and rear,
The state in which both cut edges are formed simultaneously is shown, and the pressure roller 15 is arranged so that its inclined axis 18 is parallel to the rotating roller 13 in a plane.
The tilting shaft 18 may be slightly tilted in plan with respect to the direction of movement of the carpet A.

The first example of the forming apparatus has the above-mentioned configuration, in which the carpet A is heated at a desired cutting position and then cut by the rotary blade 3, and the cut edge supported by the rotary roller 13 is pressed by the pressure roller 15. Press.

The cutting edge of the carpet A is guided by the guide ring 14, and the protrusion 4 toward the upper surface side generated when cutting with the blade 3 is guided by the pressure roller 15 which rotates as a result of contact with the carpet A. The protruding portion 4, which is pressed down and is therefore deformable by heating, is shaped so as to descend toward the cut edge side by applying pressure. That is, the pressing amount by the pressure roller 15 is slightly larger on the edge side, so that the surface of the base 1 is shaped downward at the cut edge side, and the pile near the cut edge is inclined outward. do.

In any case, the protrusion 4 is corrected by applying pressure from the upper surface of the cut edge by the pressure roller 15.
The pile near the edge is gently sloped outward, and the cut end surface has a sloped edge with the top projecting outward.

When carpet tiles that have been cut on all four sides in the manner described above are laid on the floor, the piles at the abutting areas of adjacent tiles will approach or come into close contact with each other, and the cut edges will be close together at the top, leaving no gaps. This eliminates the occurrence of blemishes, the abutment part becomes completely inconspicuous when viewed from above, and the whole piece appears to be made of one piece.

Next, FIG. 6 shows a second example of the forming apparatus, in which the carpet A is supported by an endless belt 21, and a pressure roller 2 supported by an inclined shaft 22.
3, a long conical roller is used to pressurize the surface of the carpet A over a long area.

Although not shown, the cut end of the carpet A is guided by a guide to run in a straight line.

When the long conical pressure roller 23 presses the top surface of the carpet A, due to the difference in the circumferential speed of the pressure roller 23, a slip occurs between the carpet A and the small diameter section with a slow circumferential speed that presses near the cut end. As a result, the position closer to the small diameter portion of the pressure roller 23 serves as a trowel, and the protrusion 4 can be reliably corrected.

Furthermore, when the pressure roller 23 is tilted in a plane with respect to the moving direction of the carpet A, the small diameter end acts to push the pile A outward, causing the pile 2a to slightly protrude outward from the cut edge. You can get carpet tiles with

As described above, according to the present invention, while moving the carpet, the carpet is cut with a knife along the moving direction,
At the post-cutting position, we used thermal deformation to pressurize the cut portion so that it descends from the top toward the cut edge, so that the cut edge of the carpet that was created by cutting with a knife is pressed above the cut edge. The protruding part of the pile is corrected by applying pressure, and the pile near the cut end stands upright or outward. Therefore, the overall density of the pile at the abutting part when laid on the floor surface is reduced. This makes it possible to lay uniformly and with unnoticeable abutments.

In addition, by making the pile density uniform in the abutting portions, it is possible to obtain a carpet tile that can be laid and used in the same way as a single piece, making it possible to put the carpet tile into practical use.

Furthermore, the cut end surface of the carpet becomes an inclined surface with the upper part protruding by applying pressure from above, which allows the ends to be brought into close contact with each other during installation, eliminating the occurrence of gaps in the abutting areas, and preventing collisions even in this area. The joint can be made less noticeable.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing a state in which carpet is cut, Fig. 2 is a cross-sectional view showing abutting portions when conventional carpet tiles are laid, and Fig. 3 is a first example of a carpet cutting and forming device. FIG. 4 is an enlarged longitudinal cross-sectional view showing the molded portion same as above, FIG. 5 is a cross-sectional view showing the carpet after processing, and FIG. 6 is a vertical cross-sectional view showing a second example of the molded portion. A... Carpet, 3... Rotating blade, 12... Molding device, 14... Guide ring, 15, 23... Pressure roller.

Claims (1)

[Claims] 1. A carpet with piles provided on the top surface of a thermoplastic base is moved, and while the carpet is being moved, a heating mechanism, a cutting blade, and a pressure roller at the cutting end are arranged side by side in order to heat the moved carpet. The heated part of the carpet is heated by a mechanism, and then the heated part of the carpet is cut with a knife along the moving direction, and at the position after cutting, the cut end of the carpet is pressurized from above by a pressure roller, and the pressure roller is applied. A method for forming a cut part of a carpet, characterized in that the surface of the base is pressure-formed downward toward the cut edge side by utilizing thermal deformation caused by heating in the heating mechanism.