JPH0448960Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a tape used for printed tapes, western umbrellas, blanket border tapes, ink ribbons, etc., made of long chemical fiber woven fabric with a round blade. The present invention relates to a heat-cutting machine that performs cutting and at the same time lightly welds the cut edges using heat to prevent fraying, and more particularly relates to a holding device for a round blade used in a heat-cutting machine.

(Prior art) Conventionally, as a holding device for the round blade used in this type of heat cutting machine,
As described in the application documents of No. 60-139291, a round blade that is heated by a heater provided around the round blade is rotatably supported on a fork-shaped support by a pivot in the center of the round blade. There is a known method in which a chemical fiber woven fabric moving on a rotating roll is cut by force and the cut ends are lightly heat-welded.

(Problem that the invention aims to solve) However, because the round blade is heated up to nearly 300℃ depending on the type of chemical fiber woven fabric to be cut, the support that forms the support part is insulated and has poor thermal conductivity. Even if they were made, there were cases where the spindle of the round blade would become unable to rotate or malfunction in a relatively short period of time due to seizure or the like, making it impossible to continue stable heat-cutting work. A possible solution was to increase the gap between the bearings, but this would not solve the problem as cutting accuracy would deteriorate and there was a limit to the size of the gap.

The present invention was devised in view of the above-mentioned conventional problems, and includes a rolling round blade that is heated to a high temperature, which is held by guide bodies at three locations around its periphery, and at least one of the guide bodies is connected to the round blade. By biasing the round blade with an elastic body, the round blade can roll stably for a long time without the need for special lubrication and without swinging as the support surface of the woven fabric moves. It is an object of the present invention to provide a round blade holding device for a self-aligning type heat cutting machine that can be extremely easily replaced for polishing.

(Means for Solving the Problems) The configuration of the present invention for achieving the above object will be explained with reference to FIGS. 1 to 3, which correspond to embodiments.

The round blade holding device 10 of the heat cutting machine of the present invention holds a long chemical fiber woven cloth T which is driven to run in the longitudinal direction, by holding a plurality of tapes T on a rotating support surface 2a.
A holding device 10 that holds a substantially perfect circular rolling round blade 3 of a heat cutting machine 1 for heat cutting in a state substantially perpendicular to a rotational support surface 2a, the edge of the round blade 3 on the rotational support surface 2a side. A retaining plate 11 that partially exposes the retaining plate 11, a heater 12 attached to a part of the retaining plate 11, and an edge 3a of the round blade 3.
three guide bodies 13, 14, 15 supported by the retaining plate 11 at three locations so as to be in contact with the center point 3b of the round blade 3 and to encompass the center point 3b of the round blade 3; and at least one of these guide bodies. 13 is pivotably supported, and the round blade 3 is connected to the other two guide bodies 14, 1.
5, and means 16 for biasing it toward the direction 5.

(Function) The main round blade holding device 10 holds the round blade 3 at its edge 3.
In a, guide bodies 13, 1 supported by retaining plates 11, 11 at three locations encompassing the center point of the round blade 3
4, 15, and three guide bodies 13, 1
At least one guide body 13 among the guide bodies 4 and 15 is pivotably supported to move the round blade 3 to the other two guide bodies 1.
4 and 15, the heater 12
a guide body 13 that abuts at an edge 3a away from the center of the round blade 3, which is heated intensively by
The heat load on parts 14 and 15 is significantly reduced compared to the conventional support bearing in the center of the round blade, and it not only guides the rolling of the round blade 3 stably for a long time without causing seizure, but also provides support for grinding, etc. The round blade 3 can be replaced by simply pulling out the round blade and pushing it in again. Further, even if the diameter of the round blade 3 is reduced by polishing or the like and the center point is shifted, self-centering is performed to enable smooth rolling.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 3, a heat cutting machine 1 cuts a roll of a chemical fiber woven fabric T _such as nylon in the direction of an arrow A using a rubber press roller 4 and a motor. The long woven fabric T fed out by the roller 2 rotated by the roller 2 is placed on the rotational support surface 2a of the roller 2 and cut into a plurality of tapes by the edges 3a of the high-temperature round blades 3, . The paper is cut into pieces t, ..., and the cut ends are lightly heat-sealed to prevent fraying. It is configured to be wound up via tubes 5a, 5a.

A round blade holding device 10 that rotatably holds a high-temperature round blade 3 has a cutting edge 3a of the round blade 3 that is
A pair of left and right holding plates 11, 11 are partially exposed so as to be able to come into contact with the supporting surface 2a of the holding plate, a heater 12 is attached to the front part of the holding plates, and a heater 12 is attached to the rear end of the holding plates 11, 11. A fixed L-shaped arm 17 and a support base 1 that swingably supports the arm.
8, an air cylinder 19a articulated between the upper end of the arm 17 and the upper end of a support rod 18a protruding from the rear end of the support 18, and a tension spring 19b.

The round blade 3 is made of high-speed steel such as SKH9, has a hardness of hardness of 65, and is slightly smaller than the hardness of the roller 2 (75), and has a small hole 3c for polishing in the center. There is.

The holding plates 11, 11 are arranged in three places (triangle D
The guide bodies 13, 14, and 15, each consisting of a trochanter having a V-groove C in the center, are rotatably supported in the guide body. The lowermost guide body 13 is connected to the holding plate 11,1
It is pivotably and rollably supported via a support frame 16a at the front lower part of the guide plate 1, and is biased toward the other guide plates 14 and 15 by a biasing means 16 consisting of a leaf spring 16b. has been done. The uppermost guide body 14 is a sliding member that moves up and down by the rotation of a screw 14a to ensure that the edge 3a is exposed when the diameter of the round blade 3 is reduced by polishing. It is pivotally supported by the frame 14b. The intermediate guide plate 15 is pivotally supported between the retaining plates 11, 11 at the rear.

The heater 12 is a J-shaped copper body 12 with good thermal conductivity.
a, and a heating resistor 12b inserted into the copper body, which heats the round blade 3 by approximately 300 degrees by radiation.
Heat to about ℃.

The support base 18 is the frame 1a of the heat cutting machine 1.
The tape t is fixed to a supporting rod 1b horizontally suspended by tightening screws 18b at a pitch corresponding to the width of the tape t. When the air cylinder 19a is contracted during non-cutting, the arm 17 is tilted by the spring 19b, and the round blade 3 is separated from the support surface 2a, and when the air cylinder 19a is extended during cutting, the spring 1
The circular blade 3 is pressed against the support surface 2a against the rotation of the roller 2, and the woven fabric T fed with the rotation of the roller 2 is attached to the tape t...
The round blade 3 rolls while cutting into... and lightly heat welding to prevent fraying. While the round blade 3 is rolling, the guide bodies 13, 14, and 15 of the trochanter are also rolling, and the edge 3a is protected by the V-groove C.

When the edge 3a becomes dull and you want to replace it with a polished one, contract the air cylinder 19a, turn the round blade 3 diagonally upward, pull out the round blade 3, and push in the polished one. It can be installed. Further, even for the round blade 3' whose diameter has been reduced by polishing, the point of action of the edge can be selected at an appropriate position by pushing in the screw 14a and biasing and deforming the leaf spring 16b.

As the guide bodies 13, 14, 15, in addition to the trochanters, plastic bodies having V-grooves with good heat resistance and lubricity can also be used. Furthermore, it is also possible to use a single holding plate 11 and use a molded heater.

(Effect of the invention) As described above, according to the round blade holding device 10 of the heat cutting machine of the present invention, the guide body 1 is supported by the holding plate 11 at three locations encompassing the center point 3a of the round blade 3.
3, 14, and 15 hold the round blade 3 by its outer peripheral edge 3, and at least one of the three guide bodies 13, 14, and 15 is pivotably supported to rotate the round blade 3.
Since the guide members 13 and 14 are urged toward the other two guide members 14 and 15, the guide members 13 and 14 abut at the edge 3a away from the center of the round blade 3, which is heated intensively by the heater 12. , 15 is greatly reduced, and the rolling of the round blade 3 is guided stably for a long time without causing seizure, and the round blade 3 can be easily pulled out when replacing it for polishing etc. , and can be pushed in, reducing the downtime of the heat cutting machine.

[Brief explanation of the drawing]

FIG. 1 is a schematic left side view of a heat cutting machine equipped with a round blade holding device of the present invention, FIG. 2 is a left side view of the same round blade holding device, and FIG. 3 is a front view of the same. Explanation of symbols, 1... Heat cutting machine, 2a...
Rotation support surface, 3...Round blade, 3a...Edge, 3b
... center point, 10 ... round blade holding device, 11 ... holding plate, 12 ... heater, 13, 14, 15 ... guide body, 16 ... urging means.

Claims (1)

[Scope of utility model registration request] The almost perfect circular rolling blade 3 of the heat cutting machine 1 heat-cuts a long chemical fiber woven cloth T, which is driven to run in the longitudinal direction, into a plurality of tapes t on the rotational support surface 2a. 2a, the holding device 10 includes a holding plate 11 that covers the edge 3a of the round blade 3 on the rotation support surface 2a side so as to partially expose it; The attached heater 12 and the edge 3 of the round blade 3
three guide bodies 13, 14, 15 supported by the retainer plate 11 at three locations so as to abut on the center point 3b of the round blade 3, and at least one guide among these guide bodies. The body 13 is pivotably supported, and the round blade 3 is connected to the other two guide bodies 1.
4, 15. A round blade holding device for a heat cutting machine, characterized in that it comprises means 16 for urging toward the blades 4 and 15.