JP2001315098A - Hot-wire cutting device for foam synthetic resin molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot-wire cutting device capable of being carried into the working site where cutting is made, wherein the length of the current-carrying heat emitting wire can be set and changed freely in accordance with the width of a foam synthetic resin molding to be subjected to cutting work. SOLUTION: The hot-wire cutting device 1 structured on the push-in cutting system is formed from a pair of left and right supporting legs 3 capable of being installed in movement at certain intervals in accordance with the width of the foam synthetic resin molding P, a horizontally laid frame 2 for stretched supporting of the current- carrying heat emitting wire 33 of a sheath structure equipped with possibility to expand and contract in sliding so as to change the length in accordance with the width of the foam synthetic resin molding P wherein the two ends are supported with possibility of elevating and sinking with respect to the legs 3 so that the heat emitting wire 33 can make vertical movement, and a drawout/draw-in means 31 based on the resilient restoring structure such as a coil spring coupled with one end of the heat emitting wire 33 and given with a constant including tension so that the length of the wire 33 is made adjustable interlocking with the sliding expansion and contraction of the frame 2. The legs 3 are equipped with a resilient restoring means 11 to allow the frame 2 to return to the over-position of the legs 3 after the wire 33 has done an intrusive cutting operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for cutting a foamed synthetic resin molded article such as a polyethylene resin plate material, which is portable so that it can be carried to a work site and used. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-wire cutting apparatus for a foamed synthetic resin molded article that can be adjusted and set in accordance with each of different width sizes and can be cut by a simple operation.

[0002]

2. Description of the Related Art Recently, for example, Sunnylight (trade name)
Polyethylene anhydrous, lightweight, heat-insulating, soundproofing and airtight foamed synthetic resin molded products such as urethane foam materials and styrofoam materials called Styrofoam (trade name) materials It is used as a wall material for sound insulation and heat insulation between columns in a building.
When using the foamed synthetic resin molded article as a wall material, for example, use a cutter or the like to cut the width and length dimensions according to the interval between the two pillars, and further to the height of the wall, and then attach the molded article. Is what it is.

[0003]

However, cutting a foamed synthetic resin molded article by using a cutter or the like as in the prior art requires a considerable amount of labor by the operator himself, and requires a cutter blade on the cut surface. There has been a problem that the cut surface becomes coarse due to steps or irregularities, and fine chips come out from the cut surface during cutting, and the surroundings of the site are soiled.

Accordingly, the present invention has been made in view of the above-described various circumstances, and does not require the useless labor of the operator himself, and the cut surface is roughened by irregularities and steps. The foamed synthetic resin molded article can be cut cleanly and easily without losing, and no fine chips are generated from the cut surface during cutting, and the foamed synthetic resin molded article of various widths to be cut is processed. The length of the current-carrying heating wire can be freely changed according to the requirements, and it requires cutting processing of the foamed synthetic resin molded product. It is an object of the present invention to provide a hot-wire cutting device for a foamed synthetic resin molded article.

[0005]

In order to solve the above-mentioned problems, according to the present invention, the energized heat generating wire 33 extended horizontally is lowered to form a foamed synthetic wire disposed below the energized heat generating wire 33. A hot-wire cutting device 1 for cutting a resin molded product P, wherein the hot-wire cutting device 1 can adjust the length of the energizing heating wire 33 according to the width size of the foamed synthetic resin molded product P to be cut. It is provided with a draw-out / draw-in means 31 having an elastic restoring structure connected to one end of a current-carrying heating wire 33. The hot-wire cutting device 1 includes a pair of left and right support legs 3 that can be moved and installed on both sides of the foamed synthetic resin molded body P at intervals according to the width of the foamed synthetic resin molded body P,
Both ends of the heating leg 33 are supported so as to be able to move up and down with respect to the support leg 3 so as to move the heating wire 33 up and down, and can be slid and stretched to change the length according to the width of the foamed synthetic resin molded body P. Horizontal frame 2 for installation and support, horizontal frame 2
And a pull-out / retraction means 31 having an elastic restoring structure connected to one end of the heat-generating wire 33 so that the length of the heat-generating wire 33 can be adjusted in conjunction with the expansion and contraction of the slide. The pull-out / pull-in means 31 may be a helical spring 32 provided with a constant winding tension so as to extend or reduce the energized heating wire 33 while maintaining a constant tension. The support leg 3 is provided with an elastic resilient / restoring means 11 made of an elastic body so that the horizontal frame 2 can be returned to an upper position of the support leg 3 after the pushing and cutting operation by the energized heating wire 33. is there. The horizontal frame 2 may be provided with a temperature adjusting mechanism 38 for causing the energized heating wire 33 to generate heat at a desired temperature.

In the hot-wire cutting apparatus 1 according to the present invention having the above-described structure, the energized heating wire 33 is lowered while being kept substantially horizontal, and the foamed synthetic resin molded body below the energized heating wire 33 is lowered. Cut P neatly. The pull-out / pull-in means 31 extends or contracts the energized heating wire 33 while maintaining a constant tension via a helical spring 32 which is connected to one end of the energized heating wire 33 and has a given winding tension. Foamed synthetic resin molded product P to be cut and cut
It is possible to adjust the length of the current-carrying heating wire 33 according to the width size of. The horizontal frame 2 for supporting the energized heating wires 33 is
The energized heating wire 33 is moved up and down with respect to the support leg 3, and the foamed synthetic resin molded body P located below is cut while holding the energized heating wire 33 horizontally. And does not generate chips or the like during cutting. When the length of the horizontal frame 2 itself is expanded or contracted in accordance with the width size of the foamed synthetic resin molded product P, the horizontal frame 2 for supporting the energized heating wire 33 is supported by the drawing / retracting means 31. The energized heating wire 33 is also expanded or contracted at the same time, and the length of the energized heating wire 33 itself is adjusted. The elastic repelling restoring means 11 provided on the support leg 3 allows the worker to press down the horizontal frame 2 with his / her finger against the elastic repelling force, and to apply the heating wire 33 to form the foamed synthetic resin molded body. On the other hand, after the P is cut, the finger is released from the horizontal frame 2 after the pressing and cutting operation by the energizing heating wire 33, so that the horizontal frame 2 itself together with the energizing heating wire 33 reduces the elastic and resilient force of the elastic and resilient original means 11. Let it return to the upper position of the support leg 3.
The temperature adjusting mechanism 38 disposed on the horizontal frame 2 causes the heating wire 33 to generate heat at a temperature at which the foamed synthetic resin molded body P can be melted, and does not generate fine chips and dust during cutting.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
Is a polyethylene-based anhydrous, lightweight, heat-insulating, soundproofing, and air-tight foam synthetic resin such as urethane foam material and styrofoam material, which are referred to as, for example, Sunnylight (trade name) material and Styrofoam (trade name) material. A hot-wire cutting device for cutting the molded body P, wherein the hot-wire cutting device 1 lowers the energized heat generating wire 33 stretched horizontally to lower the energized heat generating wire 3.
3 is formed by a push-cutting method for cutting the foamed synthetic resin molded body P located below.

As shown in FIG. 1, the hot-wire cutting device 1 comprises a support leg 3, a horizontal frame 2, and a pull-out / retraction means 31. That is, the support leg 3 is formed as a pair of left and right, for example, a hollow rectangular column that can be moved and installed at both sides of the foamed synthetic resin molded body P to be cut with an interval corresponding to the width size of the foamed synthetic resin molded body P. is there.
Both ends of the horizontal frame 2 are supported so as to be able to move up and down with respect to the support leg 3 so as to move the heating wire 33 up and down, and slide to change the length in accordance with the width size of the foamed synthetic resin molded body P. Approximately inverted U when viewed from the front due to the sheath structure that can be expanded and contracted
It is for supporting the energized heating wire 33 having a U-shape. The draw-out / retraction means 31 is connected to one end of the heating wire 33 so that the length of the heating wire 33 can be adjusted in conjunction with the expansion and contraction of the horizontal frame 2. The energizing heating wire 33 is extended or contracted while a constant tension is maintained through an elastic restoring structure such as a helical spring 32 described later.

The support leg 3 is provided with an elastic resilient original means 11 made of an elastic body so that the horizontal frame 2 after the pushing and cutting operation by the electric heating wire 33 is returned to the upper position of the support leg 3. That is, as shown in FIG. 4, the supporting leg 3 is formed in a hollow rectangular column shape whose lower end is closed by a wide, substantially square plate-shaped flat pedestal portion 12 so that the supporting leg 3 can be stably installed on the work surface. In the support leg 3, a guide column 13 is formed upright at the center of the plane pedestal portion 12, and a guide slit 14 extends in the longitudinal direction from the upper side of the support leg 3 side in parallel with the guide column 13. Are formed. The length of the guide slit 14 is set to a range corresponding to the vertical sliding stroke of the horizontal frame 2 required for cutting the foamed synthetic resin molded body P by the electric heating wire 33. Then, the guide column 13 is inserted into the insertion base 15A of the vertical slide support portion 15 including the insertion base 15A and the support piece portion 15B for supporting and fixing both ends of the horizontal frame 2, In the state where the support piece portion 15B is projected outward through the guide slit 14, the vertical slide support portion 15 is provided.
The body itself can be slid up and down along the guide column 13. Further, a coil spring 16 is interposed between the vertical sliding support portion 15 and the flat base portion 12 so as to be compressed and wound around the guide column 13, and the coil spring 16 is elastically and elastically repelled by the coil spring 16. The upper opening of the support leg 3 is closed by a lid 17 to lock the vertical slide support 15 so that the vertical slide support 15 is not removed from the guide column 13.

As shown in FIG. 3, the horizontal frame 2 includes a right horizontal frame 22A and a right arm frame 22B formed at one end of a horizontal right cylindrical body 22A. ,
A left arm frame portion 23B is provided at one end of the horizontal left cylindrical body portion 23A.
Left lateral frame 2 having a substantially L-shape as a whole in which
3, the opening end side of each of the right cylindrical body 22A and the left cylindrical body 23A has a sheath shape in which one of the width diameters is larger than the other width diameter so as to be relatively slidable. And the whole is in a substantially inverted U-shape when viewed from the front. By doing so, the right cylindrical body 22A and the left cylindrical body are changed in order to change the distance between the right arm frame 22B and the left arm frame 23B in the horizontal frame 2 according to the width size of the foamed synthetic resin molded body P. 22B
And can be slidable with respect to each other. The length of the expansion / contraction is, for example, the distance between the right arm frame portion 22B of the right horizontal frame member 22 and the left arm frame portion 23B of the left horizontal frame member 23 freely expandable and contractable in a range from a minimum of about 900 mm to a maximum of about 1850 mm. I can do it.

As shown in FIG. 2, two mounting plate portions 24 are formed side by side on the outer surfaces of the left arm frame portion 23B and the right arm frame portion 22B, respectively. The support piece 15B of the mounted vertical slide support portion 15 is sandwiched between the two mounting plate portions 24, and then the mounting bolts 25 are passed through each of the mounting plate portions 24 so that the nut 2
At 6, it can be fastened and fixed. Thus, the horizontal frame 2 is supported and fixed between the left and right support legs 3, and the horizontal frame 2 and the left and right support legs 3 can be easily disassembled and assembled. Therefore, the support leg 3
When the worker presses down the horizontal frame 2 with his / her finger or the like against the elastic repulsion force of the elastic repulsion restoring means 11 provided in the above, the foamed synthetic resin molded body P is formed by the energized heating wire 33 described later. On the other hand, after the pushing and cutting operation by the energized heating wire 33, the finger is released from the horizontal frame 2 so that the horizontal frame 2
The device itself is returned to the upper position of the support leg 3 with the elastic resilience of the elastic resilience original means 11 together with the energizing heat generating wire 33.

As shown in FIG. 3, the pull-out / retraction means 31 is provided, for example, on the left arm frame 2 of the left horizontal frame 23.
A helical spring 32 to which a constant winding tension (torque) is applied is disposed in 3B, and one end of a current-generating heating wire 33 such as a nichrome wire made of a high-resistance heating element is attached to one end of the helical spring 32. Approximately 950 mm provided on the inner bottom surface of the frame 23
, And is connected via a conductive connecting slider member 35 which is mounted on a conductive guide rod 34 and slides. The right arm frame 2 of the right horizontal frame 22
After the heating wire 33 is U-turned via two pulleys 36A and 36B made of, for example, ceramics arranged vertically in the 2B, the thickness of the foamed synthetic resin molded body P to be cut is, for example, 3 mm to 120 mm or more. For example, the right cylindrical body 22A and the left cylindrical body 2 are approximately 150 mm apart from each other.
2B, it is pulled out horizontally in a state of being separated from the lower side, and the other end of the energized heat generating wire 33 is fixedly fixed inside the left arm frame portion 23B. As a result, the energized heating wire 33 is stretched between the right arm frame portion 22B and the left arm frame portion 23B without loosening. At this time, the helical spring 32 is formed of a tough elastic body, for example, a band-like elastic plate material, and is wound with a length of about 950 mm, which is an extendable length of the horizontal frame 2. I have.

A voltage switch 37 with a power switch connected to a power supply line is provided inside the lower end of the left arm frame portion 23B. One end of the heating wire 33 is connected to a conductive guide rod 34. The other end of the energized heating wire 33 is electrically connected to the voltage generator 37 via the conductive connecting slider member 35, and the other end of the energized heating wire 33 is heated to a desired temperature, such as a volume resistor. It is electrically connected to the voltage generator 37 via the adjustment mechanism 38. In the present embodiment, the temperature adjusting mechanism 38 using a volume resistor is used. However, a volume switch having an adjusted temperature adjusting function that is also used as a power switch may be used.

Next, an example of use of the embodiment configured as described above will be described. First, when the hot-wire cutting device 1 is carried into a construction site, the mounting bolt 25 and the nut 26 are removed. The horizontal frame 2 and the left and right support legs 3 are disassembled by removing the support piece 15B on the side of the support leg 3 sandwiched between the two mounting plates 24 of the horizontal frame 2. Transported from Then, at the construction site, the support pieces 15B on the left and right support legs 3 side are attached to the two mounting plate portions 2 of the horizontal frame 2.
4, the horizontal frame 2 is arranged and fixed between the left and right support legs 3 by being fixedly fastened with the mounting bolts 25 and the nuts 26, and is used after assembling.

That is, as shown in FIG. 1, a foamed synthetic resin molded product P is placed on two square bar-shaped mounting trees Q so as to correspond to the width of the foamed synthetic resin molded product P. The width of the support legs 3 of the hot-wire cutting device 1 is set, and the horizontal frame 2 is straddled on a predetermined cut line S of the foamed synthetic resin molded body P to be cut. The support legs 3 are installed on both sides. Specifically, for example, while slightly raising only one of the support legs 3, for example, the right support leg 3, the right horizontal frame 22 in the horizontal frame 2 is lifted.
Right cylinder body 22A and left cylinder body 2 of left horizontal frame 23
By sliding the 3A and the 3A with each other, the foamed synthetic resin molded body P is positioned within the length range of the electric heating wire 33 stretched within the space between the right arm frame portion 22B and the left arm frame portion 23B. Keep it.

At this time, as shown in FIG.
When the 2A and the left cylindrical body 23A are slid in the extending direction, the connecting slider member 35 is guided by the guide shaft 34 and slid in the extending direction.
The draw-out / draw-in means 31 draws out the current-carrying heating wire 33 against the winding tension of the helical spring 32.

Conversely, the right cylindrical body 22A and the left cylindrical body 23
When A is slid in the reducing direction with respect to each other,
The connecting slider member 35 is guided by the guide shaft 34 and slides to the left, and the energized heat generating wire 33 is pulled back by the winding tension of the helical spring 32 by the drawing / pulling-in means 31.

Thus, the pull-out / retraction means 3
By means of 1, the energizing heating wire 33 is expanded or contracted, and the length of the drawn out energizing heating wire 33 itself is adjusted. Then, after the power switch is turned on and the energized heating wire 33 is set to a predetermined heating temperature by the temperature adjusting mechanism 38, the operator himself uses his / her fingers against the horizontal frame against the elastic resilience of the elastic resilience original means 11. What is necessary is just to cut | disconnect the foaming synthetic resin molded object P by the heating wire 33 by pressing and falling the body 2.

On the other hand, after the pushing and cutting operation by the electric heating wire 33, the fingers and the like are separated from the horizontal frame 2 so that the horizontal frame 2
It itself is returned to the upper position of the support leg 3 with the urging force of the elastic / repellent original means 11 together with the energizing heating wire 33.

[0020]

Since the present invention is constructed as described above, it does not require the useless labor of the operator himself, and does not cause irregularities or steps to occur on the cut surface and the foamed synthetic resin is not roughened. The molded body P can be cut cleanly and easily, and fine chips do not come out from the cut surface during cutting. In addition, the length of the current-carrying heating wire 33 can be freely changed according to the foamed synthetic resin molded body P of various widths to be cut, and the cutting of the foamed synthetic resin molded body P is required. It is easy to disassemble and assemble, and can be made lightweight, so that it can also be used for carry-on.

That is, in the present invention, the heating wire cutting device 1 is provided with the heating wire 33 so that the length of the heating wire 33 can be adjusted according to the width size of the foamed synthetic resin molded article P to be cut. This is because the draw-out / pull-in means 31 having an elastic restoring structure connected to one end is provided, so that the heating wire 33 is lowered while being kept substantially horizontal, and foaming below the heating wire 33 is performed. The synthetic resin molded body P can be cut cleanly, and the cut surface is not roughened by using a cutter and chips are not produced as in the conventional case. Moreover, since it is lightweight and easy to disassemble and assemble, it can be easily carried to a construction site.

The hot-wire cutting device 1 includes a foamed synthetic resin molded body P
And a pair of left and right support legs 3 that can be moved and installed at intervals according to the width size of the foamed synthetic resin molded body P, and support legs 3 that move up and down the energized heating wires 33.
A horizontal frame 2 for supporting the extension of the current-carrying heating wire 33, which is supported at both ends so as to be able to ascend and descend and which can be slidable to change the length in accordance with the width size of the foamed synthetic resin molded body P; Since the pull-out / retraction means 31 having an elastic restoring structure connected to one end of the heat-generating heating wire 33 so that the length of the heat-generating heating wire 33 can be adjusted in conjunction with the slide expansion and contraction of the frame 2, the current-generating heating wire is provided. The foamed synthetic resin molded body P located below can be cut while the horizontal direction is held at 33, and a clean cut surface without irregularities and steps is formed, and chips are not generated at the time of cutting. In addition, the horizontal frame 2 for supporting the energized heat generating wires 33 with the sheath structure is supported by freely expanding and contracting the length of the horizontal frame 2 in accordance with the width of the foamed synthetic resin molded body P. The energizing heating wire 33 can be simultaneously expanded or contracted by the drawing means 31, and the length of the energizing heating wire 33 itself can be easily adjusted.

The draw-out / retraction means 31 is provided by a helical spring 32 which is provided with a constant winding tension so as to expand or contract the heating wire 33 while maintaining a constant tension. The energized heat generating wire 33 can be extended or contracted while maintaining a constant tension through the foamed synthetic resin molded product P to be cut.
The length of the current-carrying heating wire 33 can be adjusted according to the width size of the wire.

The support leg 3 is provided with a resilient and resilient original means 11 made of an elastic body so that the horizontal frame 2 can be returned to the upper position of the support leg 3 after the push-cut operation by the electric heating wire 33. Therefore, by pressing down the horizontal frame 2 with the operator's own finger against the urging force of the elastic resilience restoring means 11, the foamed synthetic resin molded body P is easily cut by the electric heating wire 33. be able to. On the other hand,
After the pushing and cutting operation by the user, the finger is released from the horizontal frame 2, and the horizontal frame 2 itself returns to the upper position of the support leg 3 together with the energizing heating wire 33 by the urging force of the resilient and resilient original means 11. The next cut of the foamed synthetic resin molded body P by the heating wire 33 can be performed smoothly.

The horizontal frame 2 is provided with a temperature adjusting mechanism 38 for causing the heating wire 33 to generate a desired temperature, so that the heating wire 33 is set to a temperature at which the molded synthetic resin P can be melted. It can generate heat and does not generate extra chips, fine dust, etc. during cutting.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a cross-sectional view of a horizontal frame taken along a line XX in FIG. 2;

FIG. 4 is a perspective view of a partially cut-out support leg.

[Explanation of symbols]

P: foamed synthetic resin molded body Q: mounting wood S: scheduled cutting line 1: hot wire cutting device 2: horizontal frame 3: support leg 11: resilient and resilient original means 12: flat base 13: guide pillar 14: guide Slit 15: Vertical slide support 15A: Penetration base 15B: Support piece 16: Coil spring 17: Lid 22: Right horizontal frame 22A: Right cylinder same 22B: Right arm frame 23: Left horizontal Frame body 23A: Same portion as left cylinder 23B ... Left arm frame portion 24 ... Mounting plate portion 25 ... Mounting bolt 26 ... Nut 31 ... Pull-out / retraction means 32 ... Vine spring 33 ... Electric heating wire 34 ... Guide shaft 35 ... Linkage Slider member 36A, 36B
… Pulley 37… voltage generator 38… temperature adjustment mechanism

Claims (5)

[Claims] 1. A hot-wire cutting device for lowering an energized heating wire stretched horizontally and cutting a foamed synthetic resin molded body disposed below the energized heating wire, the hot-wire cutting device comprising:
It is provided with a draw-out / draw-in means by an elastic restoring structure connected to one end of the energized heating wire so that the length of the energized heating wire can be adjusted according to the width size of the foamed synthetic resin molded article to be cut. Apparatus for cutting hot synthetic resin foam. 2. A hot-wire cutting device comprising: a pair of left and right support legs movable and installed on both sides of a foamed synthetic resin molded body with an interval corresponding to a width size of the foamed synthetic resin molded body;
Both ends are supported so as to be able to move up and down with respect to the support leg so that the heating wire can be moved up and down, and can be slid and stretched to change the length according to the width of the foamed synthetic resin molded article. Drawer with an elastic restoring structure connected to one end of the current-carrying heating wire so that the length of the current-carrying heating wire can be adjusted in conjunction with the sliding expansion and contraction of the horizontal frame.
2. The hot-wire cutting apparatus for a foamed synthetic resin molded article according to claim 1, further comprising a drawing means. 3. The pull-out / pull-out means is a helical spring formed by applying a constant winding tension so as to extend or reduce a current-carrying heating wire while maintaining a constant tension. A hot-wire cutting device for a foamed synthetic resin molded article according to the above. 4. A resilient and resilient original means made of an elastic body so as to return the horizontal frame body to a position above the support leg body after the pushing and cutting operation by the energizing heating wire. 4. A hot-wire cutting apparatus for a foamed synthetic resin molded article according to any one of claims 1 to 3. 5. The hot-wire cutting apparatus for a foamed synthetic resin molded article according to claim 2, wherein the horizontal frame is provided with a temperature adjusting mechanism for causing the heating wire to generate heat at a desired temperature.