JP2022049130A - Heat-insulating material stripper - Google Patents

Abstract

To provide a heat-insulating material stripper which accurately removes a heat-insulating material of a refrigerant pipe by fixed thickness from the surface.SOLUTION: A body 2 of a heat-insulating material stripper 1 is formed into a shape where a part of a side face of a cylinder is cut out. A notch on the side face is formed of two guide sections 6 extending in a longitudinal direction and a regulation section 8 connecting the guide sections 6 in an arch shape. A stopper 10 is provided on an opposite side in the longitudinal direction of the regulation section 8 in the body 2. A positioning section 4 is protrusively provided so as to extend in the longitudinal direction along a center of the body 2 from the inside of the stopper 10. The positioning section 4 is formed into a shape which can be inserted into a copper pipe 101 passing a center of a refrigerant pipe 100 arranged inside the body 2. In the stopper 10, a slide contact section 10a is formed to constitute the same plane as the two guide sections 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to a heat insulating material stripping device for stripping a part of the heat insulating material in the pretreatment when connecting the air conditioner main body and the refrigerant pipe.

As a measure to prevent dew condensation, a part of the outside of the heat insulating material is peeled off at the connection point between the refrigerant pipe and the main body of the air conditioner to a certain thickness, and the connection port is overlapped on the peeled off part, and then the heat insulating treatment is performed. Construction is known. In such construction, when the heat insulating material is peeled off, the worker often uses a cutter knife to perform the peeling work.

However, when the stripping operation is performed using a cutter knife, the stripping state of the heat insulating material tends to vary depending on the operator. If the thickness of the remaining heat insulating material is not constant, dew condensation may occur in places where the thickness of the heat insulating material is insufficient.

Although the tool is not intended for the refrigerant pipe, Patent Document 1 describes a tool for stripping the coating of the coated wire to a certain thickness.

Japanese Unexamined Patent Publication No. 2019-4605

Generally, a member harder than the heat insulating material of the refrigerant pipe is used for covering the covered wire. Therefore, it is easy to insert the blade diagonally and perform cutting. However, it is not easy to cut off a soft member such as a heat insulating material for a refrigerant pipe. Therefore, although it is possible to cut off the surface so as to cut it into pieces, it is difficult to accurately remove only a certain thickness from the surface in order to facilitate the processing in the subsequent process.

Therefore, an object of the present invention is to provide a heat insulating material stripper that accurately removes the heat insulating material of the refrigerant pipe from the surface by a certain thickness.

In order to achieve the above object, the heat insulating material stripping device of the present invention is a heat insulating material stripping device for stripping the heat insulating material at the cut end of the refrigerant pipe of the air conditioner, and is inserted into the copper pipe of the refrigerant pipe. A guide for guiding the cutting of the heat insulating material along the longitudinal direction, which is arranged along the surface of the heat insulating material positioned by the positioning unit and the positioning unit for positioning with respect to the center of the copper pipe. It is characterized by including a portion and a regulating portion that regulates the cutting of the heat insulating material along the guide portion at a predetermined distance from the cut end portion.

Further, the heat insulating material stripper of the present invention is characterized in that, in addition to the above configuration, an orthogonal guide surface for cutting in a direction orthogonal to the longitudinal direction of the refrigerant pipe is formed in the restricting portion. ..

Further, the heat insulating material stripper of the present invention is characterized in that, in addition to the above configuration, a sliding contact portion is provided on the base side of the positioning portion along a virtual plane including the pair of guide portions. And.

Further, in the heat insulating material stripper of the present invention, in addition to the above configuration, a stopper that interferes with at least one of the refrigerant pipe and the heat insulating material to stop the movement in the longitudinal direction is provided on the base side of the positioning portion. It is characterized by being provided.

As described above, according to the present invention, since the position is positioned with respect to the center (copper pipe) of the refrigerant pipe, the distance from the center can be kept constant even if the heat insulating material is peeled off. Further, since the pair of guide portions are formed in the longitudinal direction along the surface of the heat insulating material, the heat insulating material can be reliably peeled off to a certain depth simply by sliding the blade along the guide portions. Further, since the restricting portion is provided at a predetermined distance from the cutting end portion, the cutting end portion side can be cut at a constant distance.

Further, according to the present invention, in addition to the above effect, an orthogonal guide surface for cutting the heat insulating material is formed in a direction orthogonal to the longitudinal direction of the refrigerant pipe of the regulating portion, so that a constant dimension is formed from the cut end portion. Can be cut accurately with.

Further, according to the present invention, in addition to the above effects, since the sliding contact portion is provided on the base side of the positioning portion, the blade can be slid along the sliding contact portion to accurately refer to the heat insulating material. It is possible to insert the cutting edge.

Further, according to the present invention, in addition to the above effects, a stopper that interferes with the refrigerant pipe or the heat insulating material is provided on the base side of the positioning portion, so that the cut end portion can be simply abutted against the stopper. It can be easily cut accurately from the cut end to a certain size.

The heat insulating material stripper according to the embodiment of the present invention is shown, (a) is an overall perspective view seen from the front side, and (b) is an overall perspective view seen from the back side. It is a central vertical sectional view of a heat insulating material stripper. It is a side view of the stopper side of a heat insulating material stripper. It represents the surface cutting work of the heat insulating material, (a) is a state where the refrigerant pipe is installed in the heat insulating material stripper, (b) is a cutting state in the longitudinal direction, and (c) is a cutting state in the orthogonal direction. It is a figure which shows. It is a figure which shows the work of removing the residual part of a heat insulating material, (a) is the cutting state in the longitudinal direction, (b) is the cutting state in the orthogonal direction, and (c) is the state after cutting.

Hereinafter, the heat insulating material stripper according to the embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the heat insulating material stripper 1 according to the embodiment of the present invention, (a) is an overall perspective view seen from the front side, and (b) is an overall perspective view seen from the back side.

The main body 2 of the heat insulating material stripper 1 is formed in a shape such that a part of the side surface of the cylinder is cut out. Of the side cuts cut out in this way, the linear portion extending in the longitudinal direction is the guide portion 6. There are two guide portions 6, and they are formed so as to be parallel to each other. These two guide portions 6 are formed along the longitudinal direction of the surface of the heat insulating material 102 of the refrigerant pipe 100 (see FIG. 2 described later) arranged inside the main body 2.

At the end edge of the main body 2 in the longitudinal direction, the restricting portion 8 is formed in an arch shape so as to bridge between the two guide portions 6. That is, a part of the above-mentioned side cut is formed by the regulating portion 8. The arcuate surface formed by the restricting portion 8 and in contact with the two guide portions 6 is an orthogonal guide surface 8a described later. The regulating unit 8 has a structure provided to regulate the movement of the cutter that cuts in the longitudinal direction when cutting the heat insulating material 102. In the configuration according to the present embodiment, the restricting portion 8 on which the orthogonal guide surface 8a is formed is formed along the circumferential direction of the surface of the heat insulating material 102 arranged inside the main body 2.

A stopper 10 is provided on the end edge of the main body 2 in the longitudinal direction opposite to the side where the regulating portion 8 is formed so as to close the region including at least the center of the cylindrical surface. Then, the positioning portion 4 is projected from the inside of the stopper 10 toward the longitudinal direction. The positioning portion 4 has a shape that can be inserted inside a copper pipe 101 (see FIG. 2) that passes through the center of the refrigerant pipe 100 arranged inside the main body 2. Both the stopper 10 and the positioning portion 4 are made of a resin material, and are made of a material having a relatively small sliding friction with respect to the metal. Further, the stopper 10 is formed with a sliding contact surface 10a so as to form the same plane as the guide portion 6 described above.

FIG. 2 is a central vertical sectional view of the heat insulating material stripper 1 of FIG. In FIG. 2, the accommodated refrigerant pipe 100 is also represented by a dotted line.

It can be seen that the stopper 10 is fixed to the main body 2 with a bolt 12. The positioning portion 4 is fixed to the stopper 10 by a bolt 14. Further, it can be seen that the orthogonal guide surface 8a formed in the regulating portion 8 is formed in a direction orthogonal to the longitudinal direction. Since it is configured in this way, it can be separated by cutting the heat insulating material 102 in the longitudinal direction along the guide portion 6 so as to scrape it and inserting a blade in the orthogonal direction along the orthogonal guide surface 8a. Therefore, no matter what rotation position the refrigerant pipe 100 is cut around the axis, the cutting work can be performed so that the heat insulating material 102 is not peeled off from the surface of the heat insulating material 102 beyond a predetermined depth D. That is, it is possible to accurately form a step by a certain distance from the tip of the heat insulating material 102 having a thickness required for connection as a post-treatment.

FIG. 3 shows a side view of the heat insulating material stripper 1 on the stopper 10 side. For convenience of explanation, the cut region of the heat insulating material 102 is shown with diagonal lines. As can be seen from FIG. 3, it is possible to accurately cut a predetermined depth D from the surface of the heat insulating material 102 of the refrigerant pipe 100. However, the cut surface is a flat surface, and in order to evenly strip off unnecessary areas over the entire circumference, it is necessary to rotate the refrigerant pipe 100 around the positioning portion 4 to change the cutting position and repeat the cutting operation. There is. Next, a specific cutting operation will be described.

4A and 4B show the surface cutting work of the heat insulating material 102, in which FIG. 4A shows a state in which the refrigerant pipe 100 is installed in the heat insulating material stripper 1, FIG. 4B shows a state in which the refrigerant pipe 100 is cut in the longitudinal direction, and FIG. It is a figure which shows the cutting state in the orthogonal direction.

In the state of FIG. 4A, the refrigerant pipe 100 whose center position is aligned so as to insert the positioning portion 4 inside the copper pipe 101 in the center is arranged (see FIG. 2). At this time, the tip of the refrigerant pipe 100 is surely inserted to a position where it abuts on the stopper 10. As a result, the heat insulating material 102 can be accurately peeled off at a certain distance from the tip.

In FIG. 4B, the cutter 103 is slid from the tip of the refrigerant pipe 100 in the longitudinal direction. As described above, since the guide portion 6 is formed parallel to the surface of the heat insulating material 102 in the longitudinal direction, the heat insulating material 102 has a uniform predetermined depth D (10 mm in the configuration of the present embodiment). Can be stripped off. Further, since the regulating portion 8 is provided, cutting can be reliably stopped at a predetermined distance from the tip (100 mm in the configuration of the present embodiment). When the cutter 103 is arranged so as to be in close contact with the sliding contact surface 10a of the positioning portion 4 at the start of cutting, the blade is accurately inserted while the surface of the cutter 103 is maintained so as to be parallel to the longitudinal direction. be able to. In the configuration according to the present embodiment, the sliding contact surface 10a
Since the run-up section is provided as in the above, the cut surface forming the corner of the tip can be accurately formed. That is, when connecting to the air conditioner side in the post-processing, the connection can be made smoothly, so that high-quality connection processing becomes possible.

In FIG. 4C, the blade of the cutter 103 is inserted in the direction orthogonal to the longitudinal direction along the orthogonal guide surface 8a. As a result, the surface extending in the radial direction forming the step is prepared, and it becomes possible to connect to the air conditioner side without a gap.

FIG. 5 shows the work of removing the residual portion of the heat insulating material 102, (a) shows a cutting state in the longitudinal direction, (b) shows a cutting state in the orthogonal direction, and (c) shows a state after cutting. It is a figure.

In FIG. 5 (a), the residual portion when the surface of the heat insulating material 102 is peeled off in the steps of FIGS. 4 (a) to 4 (c) is rotated to a position where it can be cut, and is the same as in FIG. 4 (b). Shows how a longitudinal cut is made. At this stage, a gap is formed between the refrigerant pipe 100 and the inner wall of the main body 2. However, in the configuration according to the present embodiment, since positioning is performed with respect to the copper tube 101, an accurate position can be maintained (see FIG. 2). As a result, it is possible to accurately strip off the excess heat insulating material 102 at any rotation position, leaving a certain distance from the center.

In FIG. 5 (b), cutting in the orthogonal direction is performed as in FIG. 4 (c). In this way, by repeating the operations of FIGS. 5A and 5B, the excess heat insulating material 102 can be stripped off so as to leave the heat insulating material 102 having a circular cross section. The refrigerant pipe 100 processed in this way is as shown in FIG. 5 (c).

Since it is configured as described above, regardless of the skill level of the operator, it is possible to form an accurate connection structure of the heat insulating material 102 simply by alternately repeating cutting in the longitudinal direction and cutting in the orthogonal direction. It will be possible.

The configuration as described above is an example of the present invention, and further includes the following modifications.

(1) In the above embodiment, a configuration in which the guide portion 6 and the regulation portion 8 are formed on the cylindrical main body 2 and the orthogonal guide surface 8a is formed on the regulation portion 8 is shown as an example. .. However, the main body 2 does not have to be cylindrical. For example, a simple structure may be used in which the guide portion 6, the regulation portion 8, and the orthogonal guide surface 8a are formed by bending with a wire rod.

(2) In the above embodiment, a configuration in which only one set of the guide portion 6, the regulation portion 8, and the orthogonal guide surface 8a is formed on the cylindrical main body 2 is shown as an example. However, a configuration having a plurality of sets in which the heat insulating material 102 can be peeled off with different dimensions may be used.

(3) In the above embodiment, the configuration in which the positioning portion 4 extends to the vicinity of the center of the main body 2 is shown as an example, but the configuration is not limited to such a configuration. For example, it may be configured to extend beyond the regulation unit 8.

(4) In the above embodiment, an example is shown in which the heat insulating material 102 or the stopper 10 that regulates the positioning portion 4 in the longitudinal direction is made of a plate material having a shape in which a disk is partially cut out. However, it does not have to be plate-shaped. As long as the heat insulating material 102 or the positioning portion 4 can be reliably regulated in the longitudinal direction, for example, at least one wire rod that bridges between the positioning portion 4 and the main body 2 may be used.

(5) In the above embodiment, a configuration in which the regulating portion 8 is integrally molded with the guide portion 6 is shown as an example. However, the regulation unit 8 and the guide unit 6 may be configured separately. Further, the regulating portion 8 may be configured to be slidable at an arbitrary position in the longitudinal direction. With this configuration, the stripping length can be changed according to the work target, so that it can be used for general purposes.

(6) In the above embodiment, an example is shown in which the sliding contact portion 10a is configured to bridge a pair of guide portions 6. However, it is not necessary to fill the space between the guide portions 6 as long as the friction can be reduced and the cutting edge can be accurately inserted into the heat insulating material 102. Further, a configuration having a sliding contact portion 10a on the outside of the guide portion 6 may be used.

(7) In the above embodiment, an example is shown in which the regulating unit 8 is configured to bridge between a pair of guide units 6. However, the center may be separated as long as the cutting can be restricted for each of the pair of guide portions 6. In this case, if the orthogonal guide surface 8a is formed in each of the regulating portions 8, it is possible to obtain the same effect as that of the above embodiment.

(8) In the above embodiment, a configuration in which the positioning portion 4 is formed in a columnar shape that can be inserted into the copper pipe 101 of the refrigerant pipe 100 is shown as an example. However, it does not have to be cylindrical as long as it can fix the relative positional relationship in the radial direction with respect to the copper tube 101 in a constant state. For example, it may be a plate-shaped member extending in the diameter direction of the copper tube 101. Further, in order to set the work accuracy high, it is desirable to set the gap with respect to the inner wall of the copper tube 101 as small as possible regardless of the cross-sectional shape of the positioning portion 4. For example, when the positioning portion 4 is made of a resin material, the sliding friction can be suppressed to be small with respect to the copper pipe 101, so that the inner diameter of the copper pipe 101 and the maximum diameter of the positioning portion 4 may be substantially the same. ..

(9) In the above embodiment, the configuration in which the positioning portion 4 is formed of a resin material and slippage easily occurs between the inner wall of the copper pipe 101 of the refrigerant pipe 100 and the positioning portion 4 is shown as an example. However, it is possible to take a relatively constant position with respect to the center position of the copper pipe 101, and the heat insulating material stripper 1 can be freely rotated around the copper pipe 101 (refrigerant pipe 100). As long as it has a configuration, the positioning portion 4 does not have to be an integrally molded member made of resin. For example, a rotatably configured portion may be inserted into the copper tube 101 and then fixed, and the inserted portion may be freely rotated together with the copper tube 101.

Although the heat insulating material stripper of the present invention has a simple structure, it can accurately guide the cutter and form a stepped structure on the heat insulating material at the end of the refrigerant pipe. Therefore, it is also useful in processing a coated electric wire or the like that needs to form a step.

1 Insulation material stripper 2 Main body 4 Positioning part 4a Base part 6 Guide part 8 Restriction part 8a Orthogonal guide surface 10 Stopper 10a Sliding contact surface (sliding contact part)
12, 14 Volts 100 Refrigerant piping 101 Copper pipe 102 Insulation material 103 Cutter D Predetermined depth

Claims (4)

It is a heat insulating material stripper that strips off the heat insulating material at the cut end of the refrigerant pipe of the air conditioner.
A positioning unit that is inserted into the copper pipe of the refrigerant pipe and positions the center of the copper pipe.
A guide portion arranged along the surface of the heat insulating material positioned by the positioning portion and guiding the cutting of the heat insulating material along the longitudinal direction, and a guide portion.
A heat insulating material stripper provided with a regulating portion that regulates cutting of the heat insulating material along the guide portion at a predetermined distance from the cut end portion. The heat insulating material stripper according to claim 1, wherein an orthogonal guide surface for cutting in a direction orthogonal to the longitudinal direction of the refrigerant pipe is formed in the restricting portion. The heat insulating material stripper according to claim 1 or 2, wherein a sliding contact portion is provided along a virtual plane including the pair of guide portions on the base side of the positioning portion. Any one of claims 1 to 3, wherein a stopper is provided on the base side of the positioning portion so as to interfere with at least one of the refrigerant pipe and the heat insulating material to stop the movement in the longitudinal direction. The heat insulating material stripper described in the section.

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