JP7166604B2 - Cutting tool for pipe cladding - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tube covering material cutting tool capable of extremely simply and safely cutting a covering material applied to a covering tube such as a refrigerant pipe.

2. Description of the Related Art In various plumbing works, for example, when connecting or bending refrigerant pipes, there is an operation of cutting a heat insulating material covering the refrigerant pipes. At present, the cutter blade is pressed against the positions of both ends of the range to remove the heat insulating material, and two cuts are made in the circumferential direction. It will be a stripping job.

At this time, if the cutter has poor stability, there is a risk of injury from the cutting edge. In addition, since the cutting edge of the cutter easily penetrates the heat insulating material and damages the pipe body, it is necessary to pay close attention to adjusting the length of the cutting edge.

Patent Documents 1 and 2 describe a cutting jig that facilitates the cutting operation of such a covering material. The cutting jig of Patent Literature 1 includes a curved saddle-shaped brim along the outer peripheral surface of the covering material, and a sheath erected on the saddle-shaped brim and housing a cutting blade so that it can be pulled in and out. By fixing the length of the cutting edge protruding from the sheath according to the thickness of the covering material and moving the saddle-shaped brim along the curved surface of the covering material, the covering material can be easily cut.

The cladding cutter of Patent Document 2 is provided with a plurality of holding portions that fit and hold a plurality of cladding pipes, respectively, and is configured to select the holding portion according to the diameter of the cladding pipe.

Japanese Unexamined Patent Application Publication No. 2006-210 Japanese Utility Model Laid-Open No. 5-44063

The cutting jig described in Patent Document 1 needs to be adjusted by an operator according to the thickness of the covering material when adjusting the length of the cutting edge. However, since the thickness of the cladding material differs when the diameter of the cladding tube is different, workers must check the thickness of the cladding material for each cladding tube and adjust the length to the correct length so that the cutting edge does not damage the main body of the tube. I needed it.

Moreover, since the saddle-shaped flange that fixes the cutting edge is formed into a curved surface shape along the outer periphery of the covering material, it is difficult to adapt to the curved surface shapes of a plurality of covering materials having different outer diameters.

On the other hand, the covered cutter of Patent Document 2 has a configuration in which one cutter is provided with a plurality of holding portions, so the position of the cutter needs to be adjusted each time the holding portion is changed, and this cutter adjustment work requires time and effort. It was something. Moreover, since the cutting operation involves always handling a plurality of holding portions, there is a risk that operability will be hindered. Furthermore, this cutter is configured to cut by rotating the cladding tube in the circumferential direction, and cannot cut in the longitudinal direction of the cladding tube.

Therefore, the present invention was created to solve the above-mentioned problems, and can be applied to a plurality of cladding pipes with different diameters. It is an object of the present invention to provide a cutting tool for a pipe covering material that can be set in a vertical position.

In order to achieve the above object, the first means of the present invention consists of a cutter fixture 10 detachably fixed to the tip of the cutter P, and a cladding tube Q through which the cutting edge P1 of the cutter P penetrates. A pipe cladding cut tool for cutting the cladding Q1 of the cladding Q with a tip of a cutting edge P1 protruding from the pipe abutment member 20, which is provided with a pipe abutment body 20 that abuts on the cladding Q1. The cutting edge P1 of the cutter P fixed to the cutter fixed body 10 from the abutting member 20 is provided so as to abut against the blade edge stopping portion 20A, and the tip of the cutting edge P1 abutting against the blade edge stopping portion 20A is in contact with the tube. The cutter fixing body 10 and the tube abutting body 20 are detachably provided so that the body 20 protrudes by a length suitable for the thickness of the coating material Q1 of the cladding tube Q to which it fits.

The second means is configured such that a plurality of pipe abutting bodies 20 are selectively mounted while the cutter P is fixed to the cutter fixing body 10 .

In the third means, a cutter fixing body 10 detachably fixed to the tip of the cutter P, and a tube abutting body formed so that the cutting edge P1 of the cutter P penetrates and abuts on the coating material Q1 of the cladding tube Q. 20 for cutting the covering material Q1 of the cladding pipe Q with the tip of the cutting edge P1 projecting from the pipe contacting body 20, wherein the pipe contacting body 20 to the fixed cutter body 10 The cutting edge P1 of the cutter P fixed to the cladding tube Q is provided so as to abut against the edge stopping portion 20A, and the tip of the cutting edge P1 abutting against the edge stopping portion 20A is the tip of the cladding tube Q to which the tube abutting body 20 fits. A vertical cut fixing portion 21 configured to protrude with a length suitable for the thickness of the cladding Q1 and abutting on both longitudinal side surfaces of the position where the cladding Q1 is vertically cut along the longitudinal direction of the cladding Q1; A lateral cut fixing portion 22 is provided which is notched perpendicular to the cut fixing portion 21 and abuts along the peripheral side surface of the cladding tube Q on both sides of the position where the cladding material Q1 of the cladding tube Q is laterally cut. A pair of guide projections 23A are formed on both sides of the cutting edge P1 stopped at the cutting edge stopping portion 20A and are in contact with the covering material Q1.

A fourth means is to form a guide abutting portion 24A that abuts on the coating material abutting surface of the lateral cut fixing portion 22 along the outer peripheral surface of the cladding tube Q at three points, thereby is configured.

The fifth means consists of a cutter fixing body 10 detachably fixed to the tip of the cutter P, and a tube abutment body formed so that the cutting edge P1 of the cutter P penetrates and abuts on the coating material Q1 of the cladding tube Q. 20 for cutting the covering material Q1 of the cladding pipe Q with the tip of the cutting edge P1 projecting from the pipe contacting body 20, wherein the pipe contacting body 20 to the fixed cutter body 10 The cutting edge P1 of the cutter P fixed to the cladding tube Q is provided so as to abut against the edge stopping portion 20A, and the tip of the cutting edge P1 abutting against the edge stopping portion 20A is the tip of the cladding tube Q to which the tube abutting body 20 fits. It is configured to protrude with a length suitable for the thickness of the coating material Q1, and a scale for finely adjusting the length of the cutting edge is provided in the vicinity of the cutting edge stopping portion.

A sixth means is provided with an adjustment aid 20D attached to the pipe abutting member 20 for finely adjusting the projected length of the tip of the cutting edge P1.

The pipe abutting member 20 of the seventh means has a horizontal displacement suppression line 24 formed in a V-shape to prevent displacement when in contact with the covering material Q1.

The eighth means is that the tube contacting body 20 is provided with a guide projection 23A for preventing displacement when contacting the covering material Q1.

A ninth means is that the tube contact member 20 is provided with a guide contact portion 24A.

When the cutting edge P1 of the cutter P is slid and protruded, it is provided so as to abut against the cutting edge stopping portion 20A of the selected tube contact body 20, and the tip of the cutting edge P1 that abuts against the cutting edge stopping portion 20A touches the tube contacting body 20. , the length suitable for the thickness of the cladding material of the cladding tube Q that conforms to . It can be set on the edge of the blade. Moreover, it is possible to quickly deal with a plurality of cladding tubes Q having different diameters.

With the cutter P fixed to the cutter fixed body 10, it is configured so that it can be freely selected from among a plurality of tube abutment bodies 20, so that when the cutter fixed body 10 is fixed to the tip of the cutter P, the tip of the cutter P can be changed. It can be firmly fixed so that it does not wobble. Moreover, it is possible to easily replace the pipe abutting member 20 attached to the fixed cutter member 10 . As a result, when several types of cladding tubes Q are processed, it is only necessary to select and mount the appropriate tube abutment member 20, so that extremely rational work becomes possible.

Since a pair of guide projections 23A are formed on both sides of the cutting edge P1 stopped at the cutting edge stop portion 20A so as to contact the longitudinal side surfaces of the cladding tube Q, when cutting the cladding material Q1 in the longitudinal direction. , the covering material Q1 bites into the guide protrusion 23A, and can suppress displacement during cutting. As a result, the vertical cutting operation of the covering material Q1 is stabilized.

By forming the guide abutment portions 24A that abut against the coating material contact surface of the lateral cut fixing portion 22 along the outer peripheral surface of the cladding tube Q at three points, the lateral displacement suppression line 24 is formed, thereby the coating material When cutting Q1 in the longitudinal direction, the guide contact portion 24A always bites into the covering material Q1, thereby suppressing displacement during cutting. As a result, the lateral cutting work of the covering material Q1 is stabilized.

By providing a scale 20C for finely adjusting the length of the cutting edge P1 in the vicinity of the cutting edge stop portion 20A, it is possible to finely adjust the length of the cutting edge P1.

The length of the cutting edge P1 can be adjusted more finely by providing an adjustment aid 20D attached to the pipe abutment body 20 to finely adjust the projected length of the tip of the cutting edge P1. selection can also be finely adjusted.

It is an exploded perspective view showing one example of the present invention. It is a perspective view which shows the use condition of this invention. FIG. 4 is a perspective view showing a state in which a cutting edge protrudes from a pipe contacting body; FIG. 11 is a perspective view showing a state in which a cutting edge protrudes from another tube contacting body; FIG. 4 is a side view showing a state in which the vertical cut fixing portion of the present invention is used; FIG. 4 is a bottom view showing a vertical displacement suppression line formed on the tube contacting body of the present invention; FIG. 4 is a side view showing a state in which the lateral cut fixing portion of the present invention is used; FIG. 4 is a bottom view showing scales formed on the tube contacting body of the present invention; Fig. 2 is a side view showing the adjustment aid of the present invention; (a) to (d) are perspective views showing the cutting process of the present invention.

The tool of the present invention is a tube cladding material cutting tool that cuts the cladding material Q1 of the cladding tube Q with the tip of the cutting edge P1 penetrating the pipe abutment body 20 from the fixed cutter 10. As shown in FIG.

In the present invention, in particular, a plurality of types of tube abutment bodies 20 that are suitable for cladding tubes Q having a plurality of diameters are formed in advance. When the cutting edge P1 is protruded from the selected pipe contacting body 20, the length of the protruding cutting edge P1 is suitable for the thickness of the covering material Q1 of the cladding pipe Q adapted to the selected pipe contacting body 20. It is configured to be as long as

The illustrated cutter fixing body 10 is formed separately from the tube contacting body 20 and is detachably provided (see FIG. 1). It is also possible to integrally form the cutter fixing body 10 and the pipe abutting body 20 . By separating the cutter fixing body 10 from the pipe contacting body 20, the cutter P can be securely fixed to the cutter fixing body 10 in advance before the pipe contacting body 20 is selected.

That is, in order to prevent the tip of the cutter P from wobbling, the fixing force between the tip of the cutter P and the cutter fixing body 10 is set high. At this time, if the cutter fixing body 10 and the pipe contacting body 20 are integrated, each time the pipe contacting body 20 is replaced, a strong fixing work is required, which hinders the work of replacing the pipe contacting body 20. become. Therefore, in the illustrated example, a cutter fixing body 10 for firmly fixing the cutter P and an easily replaceable tube abutment body 20 are separately formed.

The illustrated cutter fixing body 10 includes a connection base 11, a fitting portion 12, and an insertion hole 13 (see FIG. 1).

The connection base 11 is a plate-like portion superimposed on the pipe contact member 20 and detachably connected thereto. A fitting portion 12 for fitting and fixing the tip of the cutter P is projected from the connecting base 11 . The fitting portion 12 shown in the figure has left and right pinching pieces 12A that pinch the side surfaces of the tip of the cutter P and contact pieces 12B that contact the tip of the cutter P, protruding from the connecting base 11 ( See Figure 1). An insertion hole 13 for inserting the cutting edge P1 of the cutter P fixed to the fitting portion 12 is formed from the contact piece 12B to the connection base 11. As shown in FIG.

In the illustrated example, a nut-shaped fixture 14 is used to more securely fix the tip of the cutter P (see FIG. 3). The fixture 14 is screwed to a connection screw P2 that is provided in advance on the side surface of the tip of the cutter P. As shown in FIG. That is, the connection screw P2 of the cutter P fitted in the fitting portion 12 is protruded outside the clamping piece 12A, and the fixture 14 is fixed by screwing the projecting connection screw P2. Therefore, one clamping piece 12A is formed in advance with a slide groove 12C for slidingly moving the connecting screw P2 (see FIG. 3). The use of the fixture 14 can be arbitrarily selected according to the type and configuration of the cutter P and the like.

The pipe abutment member 20 overlaps with the cutter fixing member 10 and abuts on the covering material Q1 of the cladding pipe Q, and the tip of the cutting edge P1 projecting from the pipe abutment member 20 cuts the covering material Q1. .

A plurality of types of tube contact bodies 20 are formed to suit a plurality of diameters of the cladding tube Q, and the appropriate tube contact body 20 is selected depending on the cladding tube Q to be processed ( See Figure 1). A slide fixing portion 25 for detachably fixing the connection base 11 of the cutter fixing body 10 is formed on the upper surface of each tube contacting body 20 .

The slide fixing portion 25 includes a pair of fitting pieces 25A into which the longitudinal side edges of the connecting base 11 are slidably fitted, a stopping piece 25B that abuts on the slide leading end of the connecting base 11, and an engaging piece that engages with the sliding rear end. It is configured with a stop piece 25C. The locking piece 25C is a portion that cuts out the upper surface of each pipe abutting member 20 and swings up and down. (See Figure 2).

When the connection base 11 is slidably fitted into the slide fixing portion 25, the connection base 11 is guided to a fixed position by the fitting piece 25A and the stop piece 25B, and the locking piece 25C is locked and fixed to the connection base 11. (see Figure 2). When performing a cutting operation with the cutter P, the cutting edge P1 is pulled in the direction of the stop piece 25B, making it difficult to remove. When removing the pipe abutment member 20 from the fixed cutter member 10, it can be easily removed from the fixed slide portion 25 by sliding the connection base 11 to its original position while pushing down the locking piece 25C with a finger or the like (Fig. 1).

The pipe abutment member 20 is provided with a cutting edge stopping portion 20A against which the cutting edge P1 abuts. The illustrated cutting edge stopping portion 20A is formed at one end of an insertion hole 20B through which the cutting edge P1 is inserted (see FIGS. 3 and 4). The cutting edge P1 abutting against the edge stopping portion 20A is provided to protrude with an optimum length for cutting the cladding material Q1 of each cladding tube Q to which the tube abutting member 20 fits. For example, when the thickness of the covering material Q1 is 20 mm, the cutting edge P1 is set so as to protrude by 19 mm, so that the main body Q2 of the covering tube Q is not damaged, and the operation of stripping the covering material Q1 is facilitated. (See Figure 3). Further, when the pipe contacting body 20 is changed, the projection length of the cutting edge P1 is also changed according to the thickness of the covering material Q1 of the cladding pipe Q to which the pipe contacting body 20 is adapted (see FIG. 4).

Further, the pipe abutment member 20 is formed with a vertical cut fixing portion 21 and a horizontal cut fixing portion 22, and by abutting against the side surface of the cladding tube Q, the direction of the cutting edge P1 can be selectively fixed. (See Fig. 2). That is, when the longitudinal cut fixing portion 21 is brought into contact with both longitudinal side surfaces of the cladding tube Q, the cutting edge P1 is set along the longitudinal direction of the cladding tube Q (see FIG. 5). Therefore, in a state in which the longitudinal cut fixing portion 21 is in contact with the side surface of the cladding tube Q, the tip of the cutting edge P1 protruding with an optimum length is inserted into the side surface of the cladding tube Q, and the cutter P is moved in the longitudinal direction of the cladding tube Q. When the cladding tube Q is slid along the cutting edge P1, the cladding tube Q can be vertically split accurately.

Further, a pair of guide projections 23A contacting the coating material Q1 are formed on both sides of the cutting edge P1 stopped at the cutting edge stop portion 20A of the vertical cutting fixing portion 21 (see FIG. 5). Further, the vertical deviation suppression line 23 is formed by connecting the two guide protrusions 23A in the longitudinal direction (see FIG. 6). When the covering material Q1 is cut along the longitudinal direction, if the vertical deviation suppression line 23 is overlapped along the longitudinal side surface of the covering tube Q, linear movement of the vertical cut fixing portion 21 is stabilized. In particular, it is more effective for a cladding tube Q, such as a refrigerant pipe, which has unevenness on the surface of the cladding material Q1, because the guide projection 23A is fitted in the concave portion. The guide projection 23A can be formed by cutting and raising the coating material contact surface of the vertical cut fixing portion 21, or by forming a bead connecting a plurality of points (not shown).

On the other hand, the horizontal cut fixing portion 22 is a portion formed by notching the side surface of the vertical cut fixing portion 21 so as to be orthogonal to the vertical cut fixing portion 21 (see FIG. 1). When the cutting edge P1 abuts along the circumferential side of the cladding tube Q, the cutting edge P1 is fixed laterally with respect to the longitudinal direction of the cladding tube Q (see FIG. 7). Therefore, by rotating the cutter P with the cutting edge P1 inserted into the side surface of the covering material Q1, the cutting operation of the covering material Q1 can be performed accurately. In particular, it is more effective for a cladding tube Q such as a refrigerant pipe having unevenness on the surface of the cladding material Q1 because the guide abutting portion 24A is fitted in the concave portion.

In the illustrated example, a guide contact portion 24A is formed on the coating material contact surface of the side cut fixing portion 22 (see FIG. 7). The guide abutting portion 24A is formed in a V-shape, and arranged so as to abut on the outer peripheral surface of the cladding tube Q at three points at the same time when the cladding material Q1 is cut. ing. When the coating material Q1 is cut in the lateral direction, it is possible to suppress deviation in cutting by overlapping the lateral displacement suppression lines 24 along the circumferential direction of the cladding pipe Q. In the drawing, the guide contact portion 24A at the top is not in contact with the covering material Q1, but when the lateral cut fixing portion 22 is pressed against the covering material Q1 for cutting, the guide contact portion 24A at the top also contacts the covering material Q1. It will be. Further, it is also possible to form the guide abutting portions 24A that abut at these three points in a projecting shape (not shown).

In the pipe abutting member 20 shown in the figure, one vertical cut fixing portion 21 is formed with one horizontal cut fixing portion 22 (see FIG. 1). It is also possible to provide the cut fixing part 22 side by side. In this case, the lengthwise cut fixing portion 21 is set to a size suitable for the cladding tube Q having the largest diameter, and the width of the vertical shift suppression line 23 is set to match the cladding tube Q having the smallest diameter (not shown).

The triangle mark shown in FIG. 8 indicates a scale 20C for finely adjusting the length of the cutting edge P1. This scale 20C forms the scale 20C along the insertion hole 20B of the pipe abutment member 20 having the closest diameter when cutting the cladding material Q1 of the special cladding pipe Q having a slightly different diameter, for example. By sliding the position of the cutting edge P1 stopped at the cutting edge stop portion 20A so as to align with the scale 20C, the length of the cutting edge P1 is finely adjusted to be shorter.

FIG. 9 shows an adjustment aid 20D for finely adjusting the length of the cutting edge P1. The adjustment aid 20D is a member attached to the pipe abutment member 20, and covers the cutting edge P1 when finely adjusting the length of the cutting edge P1 stopped at the cutting edge stop portion 20A.

In order to strip the covering material Q1 from the covering pipe Q with the tool of the present invention, the steps shown in FIG. 10 are followed. That is, as shown in FIG. 1(a), the horizontal cut fixing portion 22 is lightly pressed against the side surface of the cladding tube Q, and two lateral cuts are made in the cladding material Q1. The inside of these two cuts will be the part to be stripped off. Next, as shown in FIG. 2(b), the cladding tube Q is slit in the longitudinal direction using the vertical cut fixing portion 21. Next, as shown in FIG. Furthermore, as shown in FIG. 3C, the covering material Q1 is peeled off with fingers. The optimum length of the cutting edge P1 protruding from the pipe abutment 20 is such that it does not contact the main body of the cladding pipe Q. There is FIG. 4(d) shows the state after the cladding Q1 has been removed from the cladding tube Q. FIG.

The configurations of the cutter fixed body 10 and the pipe abutment body 20, etc., and the shape of the cutter P, etc., of the present invention are not limited to the illustrated examples, and design changes are free within the scope of the present invention. is. Moreover, although the tool for processing the covering material Q1 of the covering tube Q is described in the present invention, it can also be used for stripping other tubes and cables.

P Cutter P1 Cutting edge Q Coating pipe Q1 Coating material Q2 Pipe body 10 Cutter fixing body 11 Connection base 12 Fitting part 12A Clamping piece 12B Contact piece 12C Slide groove 13 Insertion hole 14 Fixing tool 20 Pipe contact body 20A Cutting edge stop Part 20B Insertion hole 20C Scale 20D Adjustment aid 21 Vertical cut fixing part 22 Lateral cut fixing part 23 Vertical deviation suppression line 23A Guide protrusion 24 Lateral deviation suppression line 24A Guide contact part 25 Slide fixing part 25A Fitting piece 25B Stop piece 25C locking piece

Claims (9)

It comprises a cutter fixing body detachably fixed to the tip of the cutter, and a pipe abutting body which is formed so that the cutting edge of the cutter penetrates and abuts against the covering material of the cladding pipe, and protrudes from the pipe abutting body. A tube cladding material cutting tool for cutting the cladding material of a cladding tube with the tip of the cutting edge, wherein the cutting edge of the cutter fixed from the tube abutting body to the cutter fixing body is provided so as to abut against the cutting edge stopping part, The tip of the cutting edge that abuts the cutting edge stop portion protrudes by a length suitable for the thickness of the covering material of the covering tube to which the tube contacting body fits, and the cutter fixing body and the tube contacting body A cutting tool for pipe covering material, characterized in that it is detachably provided . 2. A cutting tool for pipe covering material according to claim 1, wherein a plurality of said pipe abutting bodies are selectively mounted in a state in which said cutter is fixed to said fixed cutter body. It comprises a cutter fixing body detachably fixed to the tip of the cutter, and a pipe abutting body which is formed so that the cutting edge of the cutter penetrates and abuts against the covering material of the cladding pipe, and protrudes from the pipe abutting body. A tube cladding material cutting tool for cutting the cladding material of a cladding tube with the tip of the cutting edge, wherein the cutting edge of the cutter fixed from the tube abutting body to the cutter fixing body is provided so as to abut against the cutting edge stopping part, The tip of the cutting edge that abuts the cutting edge stopper protrudes by a length suitable for the thickness of the cladding material of the cladding tube to which the tube abutting body fits. a vertical cut fixing portion abutting on both longitudinal side surfaces of the position where the cladding pipe is vertically cut along the longitudinal direction; A horizontal cut fixing part that abuts along the peripheral side of the cladding tube on both sides of the position for cutting laterally, and forms a pair on both sides of the cutting edge stopped at the cutting edge stop part and contacts the cladding material formed a guide projectioncharacterized byCutting tool for pipe covering material. 4. The pipe covering according to claim 3, wherein a lateral shift suppressing line is formed by forming guide contacting portions contacting at three points along the outer peripheral surface of the covering pipe on the covering material contacting surface of the lateral cut fixing portion. Cutting tool for wood. It comprises a cutter fixing body detachably fixed to the tip of the cutter, and a pipe abutting body which is formed so that the cutting edge of the cutter penetrates and abuts against the covering material of the cladding pipe, and protrudes from the pipe abutting body. A tube cladding material cutting tool for cutting the cladding material of a cladding tube with the tip of the cutting edge, wherein the cutting edge of the cutter fixed from the tube abutting body to the cutter fixing body is provided so as to abut against the cutting edge stopping part, The tip of the cutting edge that abuts the cutting edge stop portion protrudes by a length suitable for the thickness of the cladding material of the cladding tube to which the tube abutting body fits, A scale for finely adjusting the length of the cutting edge is provided near the cutting edge stop portioncharacterized byCutting tool for pipe covering material. The cutting tool for pipe covering material according to any one of claims 1 to 5, further comprising an adjustment aid attached to said pipe abutting body for finely adjusting the projecting length of said tip of said cutting edge. 7. A cutting tool for a pipe covering material according to claim 1, wherein said pipe contacting body has a horizontal deviation suppression line formed in a V-shape to prevent deviation when contacting said covering material. A cutting tool for pipe covering material according to any one of claims 1 to 7, wherein the pipe contacting body is provided with a guide projection for preventing displacement when contacting the covering material. The cutting tool for pipe covering material according to any one of claims 1 to 3 and 5 to 8, wherein the pipe contact body is provided with a guide contact portion.

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