JPH0468120B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a method of manufacturing tapes used for printed tapes, western umbrellas, blanket edge decoration tapes, ink ribbons, etc. from long chemical fiber woven fabrics with round blades. The present invention relates to a heat cutting machine that performs cutting and at the same time lightly welds the cut edge using heat to prevent fraying, and particularly relates to a holding device for a round blade used in the 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, the circular blade heated by a heat radiator is rotatably supported on a fork-shaped support via its central shaft. .

(Problem to be solved by the invention) However, depending on the type of chemical fiber woven fabric to be cut, the round blade can be heated up to nearly 300°C, so the support that forms the bearing part must be insulated or a poor thermal conductor. 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 it would impair cutting accuracy 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 by holding a rolling round blade that is heated to a high temperature at its peripheral edge, the round blade can be kept with special lubrication for a long time. We have developed a round blade holding device for heat-cutting machines that enables stable rolling without wobbling as the supporting surface of the woven fabric moves without the need of The purpose is to provide.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained with reference to FIGS. 1 to 4, which correspond to embodiments.

The round blade holding device 1 of the heat cutting machine of the present invention includes:
A device 42 that holds a rolling round blade 41 of a heat-cutting machine 1 that heat-cuts a long chemical fiber woven fabric T that is driven to run in the longitudinal direction into a tape t on the support surface 30a that moves in the running direction. urging means 45 for urging the round blade 41 toward the support surface 30a via the support frame 44 and guide bodies 47, 47 that roll into contact with the outer peripheral edge of the round blade 41;
and heating means 43 for heating the round blade 41, the at least two guide bodies 47, 47 form a triangle with the contact point _P1 of the round blade 41 against the support surface 30a, and the round blade is located within the triangle. It is characterized in that it is disposed on the support frame 44 so as to encompass the center point of 41.

(Function) The main round blade holding device is arranged so as to form a triangle with the contact point _P1 of the round blade 41 against the support surface 30a of the woven fabric T, and to include the center point of the round blade 41 within the triangle. The round blade 41 is held on the support frame 44 via at least two guide bodies 47, 47, and is stably urged against the support surface 30a at the outer peripheral edge by the urging means 45 without using a support shaft. There is. The heat load on the guides 47, 47 that roll into contact with the outer periphery of the round blade 41 away from the center, which is intensively heated by the heating means 43, is significantly greater than that of the conventional support shaft at the center of the round blade. To stably guide the rolling of a round blade 41 without causing seizure.

(Example) Hereinafter, an example of the round blade holding device for a heat cutting machine of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 and 2, first, the heat cutting machine 1 will be explained.

The heat cutting machine 1 of this embodiment includes a machine base 10 consisting of a box-shaped frame with a relatively shallow depth and a large height and width, and a pair of left and right holding arms 21, 21 protruding forward from the front lower part of the machine base 10. and a material roll support means 2 consisting of a support rod 22 that is horizontally suspended in the recess of the holding arm and has rolling bearings fixed to both ends.
0, a tension means 25 which is horizontally and swingably suspended above the machine base 10 adjacent to the tension means 25, and a cutting support which is rotatably horizontally suspended substantially in the center of the machine base 10 via a pillow block. It consists of a stand roll 30, a rubber roller 36 that rolls while being pressed against the upper part of the roll under its own weight, and a support arm 37 that horizontally supports the rubber roller 36 so as to be rotatable and is rotatably supported at the rear of the machine stand 10. A press operation in which the press means 35, the cutting means 40 which supports a plurality of cutting circular blades 41 in a press-relaxable manner behind the cutting support roll 30, and the support arm 37 of the press means 35 are rotated. means 50, a winding means 60 for winding up the tape t cut by the cutting means 40, a driving means 70 for rotationally driving the winding means 60 and the cutting support roll 30, and the driving means 70. and a control means 80 for controlling the operation of the cutting means 40.

The tension means 25 includes a main tension rod 26 that is swingably suspended horizontally on the machine base 10, swing arms 27a and 27b fixed in parallel to both ends of the main tension bar 26, and the swing arms 27a and 27b. 27a, 27b
an auxiliary tension rod 28 suspended horizontally on the outer end of the
The swing operating section 29 includes a worm wheel 29a fixed to the right end of the main tension rod 26, a worm gear 29b meshing with the worm gear 29b, and an operating rod 29c with a handle integrally connected thereto. The inclination angles of the arms 27a and 27b are adjusted as appropriate depending on the type of raw chemical fiber woven fabric T and the feeding speed.

The cutting support roll 30 hardens the surface of the cylindrical carbon steel material (for example, with a shore of 75 and a depth of 1).
mm) and is chrome-plated, and has a pitch circle on the right end with the same diameter as the roll outer diameter.
and three timing belt pulleys 32, 33, 34 are fixed to the left end support shaft to provide a support surface 30a during cutting.

On the other hand, the rubber roller 36 is formed by wrapping a rubber plate around the outer periphery of a metal cylindrical body having a support shaft at both ends, and a vinyl spur gear 36a having a pitch circle with the same diameter as the outer diameter of the roller at the right end. The woven fabric T laid on the roll 30 is fed while being fixedly attached to the roll 30 and meshed with the spur gear 31 of the cutting support roll 30 to be rotated without slipping.

The press operating means 50 includes a swinging arm 5 that forms a parallelogram swinging link mechanism together with the support arm 37.
1 and a connecting link 52.
and an air cylinder 55 which is swingably suspended from support stands 54 fixed to both ends of the upper surface of the machine base 10 and whose tip end of the piston rod is connected to the support arm 37. As the piston rod moves upward, the rubber roller 36 is separated from the top of the roll 30, and as the piston rod moves downward, the rubber roller 36 is brought into contact with the top of the roll 30.

As shown in detail in FIGS. 3 and 4, the cutting means 40 according to the gist of the present invention includes a disc-shaped round blade 41 (for example,
It is made of SKH9 high speed steel and has a quenched hardness of 65, which is smaller than the roll 30), and a holding device 42 for this. Holding device 42
The supporting frame 44 holds the round blade 41 and fixes the heating means 43 so as to sandwich the round blade, and the supporting frame 44 urges the round blade 41 toward the support surface 30a of the roll 30 via the support frame 44. It is composed of an abutment 46 equipped with a force means 45. The support frame 44 includes a pair of left and right support plates 44a that sandwich the round blade 41 so that its cutting edge 41a can come into contact with the support surface 30a of the roll.
44a, and a substantially L-shaped support arm 44b which is sandwiched between the rear lower portions of these support plates and to which the heating means 43 is fixed, and is pivotably supported at the front end of the support base 46. . Support plate 4
Between 4a and 44a is the round blade 4 at the cutting position.
The two sets of guide bodies 47, 47 that hold the roll blade 1 in a rollable manner and transmit the urging force have a point of contact with the round blade forming a triangle A with a contact point _P1 with the roll support surface 30a of the round blade 41. The center point P ₀ of the round blade 41 is located within the triangle A.
The support plate 44a is rotatably supported by a support shaft 47a. The guide body 47 is assembled with two small ball bearings with a thin spacer sandwiched between them, and the cutting edge is protected by the gap formed between the ball bearings, and the shoulder of the bearing is attached to the tapered side of the edge 41a. There is point contact. Therefore, the guide body 47 is
As the round blade 41 rolls, it further rolls through the contact points, so the thermal load received from the round blade is significantly reduced. In addition to the combination of two bearings and a spacer, the guide body 47 is formed by a roller with a groove in the center.
can also be formed. Furthermore, the support plate 44a,
Between 44a are two sets of auxiliary supports 48, 4 that hold the round blade 41 in the non-cutting position so that it does not fall from the front when separated from the roll 30.
8 is attached to the front portion via arms 48a, 48a with screws 48b, 48b. When replacing the round blade 41, screw the screw 48 in the non-cutting position.
b is loosened and the arms 48a, 48a are pivoted outward from each other as shown by the imaginary lines in FIG. 3 to open them. Like the guide body 47, it is constructed by incorporating two ball bearings and a spacer between arms 48a, 48a. The heating means 43 has a fork-shaped portion 43a fixed to the upper end of a support arm 44b so as to sandwich the round blade 41, and support plates 44a, 44a.
A heat insulating material 43c such as asbestos cloth is interposed between the two.

An electric resistance rod-shaped heater 43d is inserted into the thickened portion 43b above the fork-shaped portion 43a of the heating means 43. The abutment 46 is the cutting abutment roll 3
Square rod 10 horizontally suspended on machine stand 10 behind 0
a by a screw 46a, and an air cylinder constituting a biasing means 45 is rotatably supported at the rear end.
The operating piston 45a of the air cylinder is mounted on the support base 4.
The round blade 41 is connected to the middle stage of the support arm 44b pivoted to the front end of the roll 3 through the support frame 44, guide body 47, and auxiliary support body 48.
0 to the cutting position (the round blade is shown by a solid line in FIG. 3) and the non-cutting position (the round blade is shown by a phantom line in FIG. 3). Note that the hole at the center of the round blade 41 is used for machining and regrinding of the round blade. The round blade 41 cuts the chemical fiber woven fabric T rotating on the supporting surface 30a of the rotating roll 30 with an edge 41a.
The tape is cut into tape T using pressing force and heat, and at the same time, the cut edges are lightly welded using heat to prevent fraying.

The winding means 60 includes rubber rollers 62 and 63 that are rotatably supported horizontally by pillow blocks 61 and 61 fixed to both ends of the front surface of the tenth machine above and below the roll 30, and each rubber roller 62. , 63, and also adjacent to the lower part of the machine base 10.
Swing arms 65, 65 are swingably installed at the front ends of the support arms 64, 64, which are protruded forward at both front ends of the support arms 64, 64, respectively. Horizontal winding rods 66, 6
6, and tension rods 67, 6 horizontally suspended on the machine base 10 at the lower part of each support arm 64, 64.
a coil spring 67a that is swingably supported at both ends of the swing arms 7, has its tip end connected to the middle part of the swing arms 65, 65 via turnbuckle links 65a, 65a, and extends from the rear of the machine base 10; , 67a connected to the intermediate support rods 68, 68
It is composed of. On the support arms 64, 64, rectangular rods 69, 69 are horizontally fixed and removably spaced apart from guides 69a for guiding the winding roll of the tape t.

The driving means 70 includes an inverter motor 71 erected at the left end of the machine 10, an output pulley 71a provided at the upper end of the motor 71, and a pulley 32 fixed to the left support shaft of the roll 30. The timing belt 72 is stretched between the pulley 33 and the pulley 63a of the left support shaft of the lower rubber roller 63, and the timing belt 73 is stretched between the pulley 33 and the pulley 63a of the left support shaft of the lower rubber roller 63. Fixed pulley 3
3 and the pulley 63a on the left support shaft of the lower rubber roller 63
and a timing belt 74 which is also stretched between the pulley 34 and the pulley 62a of the left support shaft of the upper rubber roller 62.

The control means 80 includes a control box 81 provided at the upper front end of the machine base 10, a power switch 82 provided in the box, a volume switch 83 for changing the input voltage of the inverter motor 71 and setting the rotation speed, and the above electric motor. A preheating switch 84 that preheats the resistance bar heater 43a, a cutting start switch 85, a varitax volume 86 that adjusts the temperature of each heater 43a, and compressed air is supplied to the individual cutting means 40 and air cylinder 47 to operate the round blade 41. A switch 88 that selectively operates the solenoid valve 87 that rotates the solenoid valve 87 to the cutting position according to the tape width.
..., solenoid valve 87... and air cylinder 47...,
It is composed of an electric pipe system etc. that supplies compressed air to 55.

Next, the operation of the heat cutting machine 1 of this embodiment will be outlined. First, a raw roll made of a chemical fiber woven fabric T such as nylon is placed on the raw roll support rod 22.
The woven fabric is passed through the path shown by the dotted chain line in FIG.
Attach to 6,66. At this time, air cylinder 4
Since compressed air is not supplied to 7, the round blade 41
is separated from the roll 30, and compressed air is supplied to the air cylinder 55 from below, so the press rubber roller 36 is lifted upward. While setting the original fabric, a preheating switch 84 is turned on to preheat the heater 43a.
Put it in. 300 for nylon woven fabric
The temperature is adjusted by the varitax volume 86 corresponding to each heater so that the temperature is .degree. At the same time, the cutting means 40 to be used and the spacing thereof are adjusted and set by moving the support base 46 according to the width of the tape to be cut and the number of tapes to be cut. When obtaining a narrow tape width, supports 46 can be arranged alternately above and below the support square rod 10a. The feeding speed is set to around 45 m/min by the volume switch 83. When the heater temperature reaches the predetermined temperature and the above settings are completed, switch 8 turns the round blade 41 that was scheduled to be used in advance.
8 to extend the air cylinder 45 and press it against the roll 30 to take the cutting position, turn on the cutting start switch 85, operate the motor 71, and move the roll 30 and take-up rollers 63, 63 to the respective arrows. Rotate it in the direction you want to see and start cutting. Adjust the feeding speed or varitax volume depending on the welding state of the cut edges of the tape. When the cutting of the predetermined length or the entire original fabric is completed, the cutting start switch 85 is turned off to finish the cutting work.

(Effects of the Invention) As described above, according to the round blade holding device 42 of the heat cutting machine of the present invention, the support surface 30a of the woven fabric T
At least two guide bodies 47, 47 are arranged to form a triangle with the contact point _P1 of the round blade 41 and to include the center point of the round blade 41 within the triangle.
The round blade 41 is held on the support frame 44 by
Furthermore, since the biasing means 45 stably biases the support surface 30a at the outer periphery without using a support shaft, even the round blade 41 heated to a considerably high temperature by the heating means 43 can still maintain the support surface 30a. As the heat cutter 30a moves, it can be rotated stably for a long time without sticking to the guides 47, 47 or shaking, improving the operating rate of the heat cutting machine 1 and increasing productivity. can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the heat cutting machine according to the present invention, FIG. 2 is a right side view of the same embodiment, and FIG.
The figure is a right side view of the round blade holding device of the heat cutting machine of the present invention, and FIG. 4 is a front view of the same device. (Explanation of symbols), 1...Heat cut machine, 30
a... Support surface, 41... Round blade, 42... Round blade holding device, 43... Heating means, 44... Support frame, 45
... Biasing means, 47 ... Guide body, T ... Long chemical fiber woven cloth, T ... Tape, P ₁ ... Contact point.

Claims (1)

[Claims] 1. A support surface 30a that moves a long chemical fiber woven fabric T that is driven to run in the longitudinal direction in the running direction.
A device 42 that holds a rolling round blade 41 of a heat cutting machine 1 that heat cuts a tape t at the top thereof, and guide bodies 47, 47 that roll the round blade 41 into rolling contact with a support frame 44 and the outer peripheral edge of the round blade 41. urging means 45 for urging toward the support surface 30a through the
and a heating means 43 for heating the round blade 41, and the at least two guide bodies 47, 47 are provided as contact points of the round blade 41 with the support surface 30a.
A round blade holding device for a heat cutting machine, characterized in that it is disposed on the support frame 44 so as to form a triangle with _P1 and to include the center point of the round blade 41 within the triangle. 2. The device according to claim 1, wherein the guide body 47 is composed of two ball bearings and a spacer, and is rotatably supported on the support frame 44.