Removal tool, and removal method using the removal tool.

Abstract

To provide a removal tool capable of easily removing a cap member even when a cylindrical portion of the cap member is fixed to a duct with a filler.SOLUTION: The removal tool includes an operating portion 21 disposed on the tool base end side L2, and an insertion / cutting portion 22 that is disposed on the tool distal end side L1 and can be freely inserted into a cylindrical portion 8 from the external side X2. The insertion / cutting portion 22 includes an insertion portion 23 that is continuously provided on the tool distal end side L1 of the operating portion 21 and extends in a tool length direction L from the external side X2 through the cylindrical portion 8 of the cap member 5 to the internal side X1 of the cylindrical portion 8 such that the distal end can be freely arranged; and a cutting portion 24A that is provided with a set interval DA1 in a tool longitudinal direction perpendicular to the tool length direction L with respect to the tool distal end side L1 of an insertion portion 12 and extends in the tool length direction L with the cutting edge side facing the tool base end side X2 and can cut a filler 14 filled in a gap G by being inserted into the gap G from the internal side L1.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a removal tool for cutting a filler filled in a gap formed between a duct inserted into a through-hole in a wall from the inner side and a cylindrical portion of a cap member inserted into the duct from the outer side, the outer side of which is closed by an extending portion extending along the wall from the outer end of the cylindrical portion, and a removal method using the removal tool.

Background Art

[0002] Patent Document 1 shows a cap member installed at the outer end of a duct inserted into a through-hole in a wall from the inner side and closing the through-hole in a breathable manner together with the outer end of the duct. The cap member is provided with a cylindrical portion inserted from the outer side with respect to the duct, and in order to prevent foreign matters such as rain from entering through the gap formed between the duct and the cylindrical body, an extending portion extending along the wall from the outer end of the outer side of the cylindrical portion is provided at the outer end of the cylindrical portion. Further, between the duct and the cylindrical portion, a filler such as a sealing material having airtightness, watertightness, and adhesiveness is filled to close the gap formed therebetween.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When it is necessary to replace the cap member due to damage, aging deterioration, etc., the cap member is pulled out to the outside and removed. However, when the cylindrical portion of the cap member is fixed to the duct by a filler, it may not be possible to easily pull it out. In such cases, the extended portion on the outside of the cylindrical part is curled up, a tool is inserted between the duct and the cylindrical part to cut the filler, and then the cap member is pulled out. However, since the cap member, including the extended portion, is often made of metal such as stainless steel, it can be difficult to curl up the extended portion, which can make the removal of the cap member difficult.

[0005] In view of this situation, the main objective of the present invention is to provide a removal tool that can easily remove a cap member even when the cylindrical portion of the cap member is fixed to the duct by a filler material, and a removal method using this removal tool. [Means for solving the problem]

[0006] A first characteristic configuration of the present invention is a removal tool that enables the removal of the cap member by cutting the filler material filling the gap formed between a duct inserted from the inside into a through-hole in a wall and the cylindrical portion of a cap member inserted into the duct from the outside, the gap being closed on the outside by an extended portion that extends along the wall from the outer end of the cylindrical portion, An operating section located on the base end of the tool, The tool is equipped with an insertion and cutting section positioned at the tip and which can be inserted into the cylindrical portion from the outside, The insertion and cutting portion is provided continuously with the tool tip side of the operating portion, and the insertion portion extends in the tool length direction from the outside through the cylindrical portion of the cap member so that its tip can be freely positioned to the inside of the cylindrical portion, The insertion portion is provided at a set interval in the vertical width direction of the tool, perpendicular to the tool length direction, with respect to the tool tip side, and also has a cutting portion that extends in the tool length direction with the cutting edge side facing the tool base end side, and is inserted into the gap from the inside, thereby capable of cutting the filler material filling the gap.

[0007] With this configuration, by operating the operating unit, the insertion and cutting unit is inserted into the cylindrical part from the outside, positioning the cutting unit on the inside side of the cylindrical part. Then, by moving the operating unit radially outward and outward, the cutting unit can be inserted into the gap formed between the duct and the cylindrical part. By moving the inserted cutting unit in the inward and outward directions, or circumferentially along the cylindrical part, the filler material filling the gap between the duct and the cylindrical part can be cut from the inside. As a result, the filler material can be cut without peeling back the extended portion of the cap member, and the cap member, even if the cylindrical part was fixed to the duct by the filler material, can be easily removed. In this way, by using a removal tool, the cap member can be easily removed even if the cylindrical portion of the cap member is fixed to the duct by the filler material.

[0008] A second characteristic feature of the present invention is that the operating section is provided with a gripping section for the operator to hold in their hand.

[0009] With this configuration, the operator can grip the handle with their hand and operate it manually, making it easier to cut the filler material manually.

[0010] A third characteristic feature of the present invention is that the operating unit is provided with a drive connection unit for connecting to a power tool that has the driving force to move the operating unit.

[0011] With this configuration, by connecting a power tool to the drive connection part, the worker can cut the filler material using the driving force of the power tool, thereby reducing the labor required for cutting the filler material.

[0012] A fourth characteristic feature of the present invention is that the insertion and cutting portion is A plate-shaped cutting tool having a mounting portion on the tip end and a cutting portion on the base end, A connecting portion extending from the tool tip side of the insertion portion to one end side in the vertical width direction of the tool, The cutting tool is equipped with a fastener that fastens the mounting portion of the cutting tool from one end in the vertical direction of the tool, The key feature is that the cutting tool is bent in such a way that the cutting portion is biased toward the one end in the vertical direction of the tool relative to the mounting portion, so that the outer surface of the cutting portion is positioned at the same location as or further toward the one end than the outer surface of the fastener in the vertical direction of the tool.

[0013] With this configuration, because the cutting tool is bent, the outer surface of the cutting portion is located at the same position as or slightly to one end of the outer surface of the fastener. As a result, the fastener does not get in the way when bringing the cutting portion closer to the inner surface of the duct, making it easier to insert the cutting portion into the gap formed between the duct and the cylindrical portion, and thus making it easier to cut the filler material.

[0014] A fifth characteristic feature of the present invention is that, when the insertion cutting portion is inserted into the cylindrical portion, the shape of the wall, when viewed in the inward and outward directions, is formed in an arc shape that follows the outer surface of the cylindrical portion.

[0015] With this configuration, since the insertion portion is formed in an arc shape along the outer surface of the cylindrical portion, even if the insertion portion is formed to be wide, it becomes easier to insert it into the gap formed between the duct and the cylindrical portion, and the work of cutting the filler material becomes easier.

[0016] A sixth characteristic feature of the present invention is that the cutting portion is formed in a tapered shape that becomes narrower towards the cutting edge.

[0017] With this configuration, the blade is formed in a tapered shape that becomes thinner towards the tip, making it easier to cut the filler material when inserted into the gap formed between the duct and the cylindrical part, thus facilitating the filler material cutting process.

[0018] The seventh characteristic feature of the present invention is a removal method using a removal tool, After inserting the insertion cutting part into the cylindrical part from the outside and positioning the cutting part inside the cylindrical part, the operation part is moved radially outward and also moved to the outside to insert the cutting part between the duct and the cylindrical part. Then, the operation part is operated to cut the filling material filled between the duct and the cylindrical part with the cutting part in a cutting step. A removing step of removing the cylindrical part from the duct and removing the cap member is performed.

[0019] According to this method, by performing the cutting step, the filling material can be cut from the inside with the cutting part by operating the operation part from the outside of the cylindrical part. Therefore, even the cap member fixed by the filling material can be easily removed in the removing step. Thus, even when the cylindrical part of the cap member is fixed to the duct by the filling material, the cap member can be easily removed by using a removal tool.

Brief Description of the Drawings

[0020] [Figure 1] Side view of the removal tool [Figure 2] Bottom view of the removal tool [Figure 3] Vertical sectional side view of the cap member [Figure 4] Vertical sectional side view showing the state where the removal tool is inserted into the cylindrical part from the outside [Figure 5] Vertical sectional side view showing the state where the removal tool is moved radially outward [Figure 6] Vertical sectional side view showing the state where the cutting part is inserted into the gap [Figure 7] Vertical sectional side view showing the state where the cap member is removed [Figure 8] Side view showing the state where the removal tool in another embodiment (1) is connected to a power tool [Figure 9] Front view showing the state where the cutting part in another embodiment (2) is formed in an arc shape

Embodiments for Carrying Out the Invention

[0021] Embodiments of the removal tool and the removal method using the removal tool according to the present invention will be described with reference to the drawings. As shown in Figures 1, 2, 4 to 6, the removal tool 1 is a tool for removing a cap member 5 attached to a duct 4 inserted from the outside X2 into a through-hole 3 in a wall 2 from the inside X1, from the outside X2. To elaborate, the removal tool 1 is a tool that cuts the filler material 14 that fills the gap G formed between the duct 4 inserted from the inside X1 into the through-hole 3 in the wall 2 and the cylindrical portion 8 of the cap member 5 inserted into the duct 4 from the outside X2, and the gap G, which is closed on the outside X2 by an extended portion 9 that extends along the wall 2 from the end of the cylindrical portion 8 on the outside X2, thereby enabling the removal of the cap member 5.

[0022] As shown in Figure 3, in this embodiment, the wall 2 is the exterior wall of a house or dwelling unit, and the duct 4 is an exhaust pipe extending from a gas appliance (such as a water heater or clothes dryer) installed inside the house and inserted into the wall 2 from the inside side X1 (inside the house). The cap member 5 is an exhaust port cover (such as a bend top) that is attached to the exhaust port of the duct 4 from the outside side X2 (outside).

[0023] The duct 4 does not protrude from the through-hole 3 to the outside X2, and a cap member 5, which is installed on the outside X2 of the duct 4, is installed so as to protrude from the through-hole 3 to the outside X2. Multiple vanes 5A are arranged side by side on the cap member 5, and the end of the outside X2 of the duct 4 is closed off in a ventilated manner by the cap member 5, and the direction of the exhaust gas discharged from the duct 4 can be changed and adjusted by this cap member 5.

[0024] The cap member 5 comprises a cylindrical base body 7 and a cap body 10 that allows ventilation to be sealed at the outer end X2 of the base body 7. The base body 7 consists of a cylindrical portion 8 inserted into the duct 4 from the outer side X2 and a flange-shaped extension portion 9 that extends along the wall 2 from the outer end X2 of the cylindrical portion 8, with the cylindrical portion 8 and the extension portion 9 being integrally formed. The cap body 10 is fixed to the extension portion 9 of the base body 7 using screws 11, and is configured to be removable from the base body 7 by releasing the screws 11. In Figure 3, the cap body 10 fixed to the extension portion 9 is shown by a solid line, and the cap body 10 removed from the extension portion 9 is shown by a dashed line.

[0025] As shown in Figure 6, the outer surface of the cylindrical portion 8 (the surface facing radially outward R1) is provided with a leaf spring material 13 that can be elastically deformed in the radial direction R. When the cylindrical portion 8 is inserted into the duct 4 and fitted in place, the cylindrical portion 8 is held in place by the elastic restoring force of the leaf spring material 13. Furthermore, when the cylindrical portion 8 is inserted into the duct 4 and fitted, the filler material 14 is applied to the outer surface of the cylindrical portion 8, and the gap G formed between the outer surface of the cylindrical portion 8 and the inner surface of the duct 4 (the surface facing radially inward R2) is sealed by the filler material 14. In this embodiment, the filler material 14 is used as a sealing material, and the filler material 14 prevents foreign matter such as rainwater from entering the interior X1 through the gap G.

[0026] The extended portion 9 extends radially outward R1 from the end of the cylindrical portion 8 that protrudes outward X2 from the through hole 3, covering the entire circumference, and blocks the portion of the through hole 3 radially outward R1 from the cylindrical portion 8 from the outside X2. By blocking the through hole 3 in this way, the extended portion 9 blocks the gap G formed between the outer surface of the cylindrical portion 8 and the inner surface of the duct 4 from the outside X2.

[0027] The cylindrical portion 8 comprises an inner cylindrical portion 16 and an outer cylindrical portion 17 located radially outward R1 of the inner cylindrical portion 16, forming a double-cylinder structure. The inner cylindrical portion 16 has a large-diameter portion 16A fixed to the outer cylindrical portion 17, a small-diameter portion 16B located X2 outward from the large-diameter portion 16A and smaller in diameter than the large-diameter portion 16A, and an enlarged-diameter portion 16C located between the large-diameter portion 16A and the small-diameter portion 16B, which becomes larger in diameter towards the inward side X1. The outer surface of the cylindrical portion 8 is formed by the outer surface of the outer cylindrical portion 17, and an extended portion 9 extends from the outer end X2 of the outer cylindrical portion 17. Furthermore, the width in the radial direction R between the inner surface of the small-diameter portion 16B in the inner cylindrical portion 16 and the outer surface of the outer cylindrical portion 17 is defined as the thickness of the cylindrical portion 8, or cylindrical portion thickness DA2.

[0028] Next, we will describe the removal tool 1. As shown in Figure 1, the removal tool 1 comprises an operating section 21 located at the tool base end L2 and an insertion / cutting section 22 located at the tool tip end L1 that can be inserted into the cylindrical section 8 from the outside X2 (see Figures 4 to 6). The operating section 21 is configured as a rod extending along the tool length direction L. When the removal tool 1 is inserted into the cylindrical section 8, as shown in Figures 4 to 6, the tool length direction L of the removal tool 1 is in the same direction as the inward / outward direction X of the wall 2. Also, the tool tip end L1 and the tool base end L2 in the tool length direction L are on the same side as the inward / outward direction X1 and X2, respectively.

[0029] The insertion and cutting section 22 comprises an insertion section 23 that is continuously provided on the tool tip side L1 of the operating section 21, and a cutting section 24A that is provided on the tool vertical width W perpendicular to the tool length direction L with respect to the tool tip side L1 of the insertion section 23, with a set interval DA1 between them. The insertion section 23 is configured as a rod shape extending along the tool length direction L, and the operating section 21 and the insertion section 23 are made of a single rod. Furthermore, the insertion cutting section 22 includes a plate-shaped cutting tool 24 having a mounting portion 24B on the tool tip side L1 and a cutting portion 24A on the tool base end side L2, a connecting portion 25 extending from the tool tip side L1 of the insertion section 23 to one end W1 in the vertical width direction W of the tool, and a fastener 26 that fastens the mounting portion 24B of the cutting tool 24 to the connecting portion 25 from one end W1 in the vertical width direction W of the tool.

[0030] The insertion and cutting section 22 is formed to be small enough to be inserted into the cylindrical section 8, with a tool width DB1, which is the width of the tool in the vertical direction W, being smaller than the inner diameter DB2 of the cylindrical section 8 (see Figure 4). In this embodiment, the width in the tool vertical direction W from the other end W2 (opposite the one end W1 in the tool vertical direction W) of the insertion portion 23 to the surface of the cutting portion 24A facing the one end W1 in the tool vertical direction W is the widest in the tool vertical direction W of the insertion cutting portion 22, and this width is defined as the tool vertical width DB1. Also, as shown in Figure 4, the inner diameter of the small diameter portion 16B of the inner cylindrical portion 16 in the cylindrical portion 8 is the smallest inner diameter in the cylindrical portion 8, and this inner diameter of the small diameter portion 16B is defined as the cylindrical portion inner diameter DB2. Since the tool vertical width DB1 of the insertion cutting portion 22 is smaller than the cylindrical portion inner diameter DB2 of the cylindrical portion 8, the insertion cutting portion 22 can be freely inserted into the cylindrical portion 8 from the outside X2.

[0031] Furthermore, as shown in Figure 1, the insertion and cutting section 22 has a set interval DA1, which is the distance between the insertion section 23 and the cutting section 24A, that is wider than the thickness DA2 of the cylindrical section (see Figure 6), and is formed to be large enough for the cylindrical section 8 to enter between the insertion section 23 and the cutting section 24A. In this embodiment, the set interval DA1 is wider than the radial R width between the outer surface of the outer cylindrical portion 17 and the inner surface of the small diameter portion 16B in the inner cylindrical portion 16. By making the interval between the insertion portion 23 and the cutting portion 24A (set interval DA1) wider than the thickness DA2 of the cylindrical portion, as shown in Figure 6, when the cutting portion 24A is inserted into the gap G, the cylindrical portion 8 can enter between the insertion portion 23 and the cutting portion 24A. This allows the cutting portion 24A to be inserted into the gap G without interfering with the cylindrical portion 8.

[0032] As shown in Figure 4, the insertion portion 23 extends in the tool length direction L from the outer side X2 through the cylindrical portion 8 of the cap member 5 to the inner side X1 beyond the cylindrical portion 8, with its tip being freely positioned. To elaborate, as shown in Figure 4, when the removal tool 1 is inserted into the cylindrical portion 8 from the outside X2 and the entire cutting portion 24A is positioned on the inside X1 side of the cylindrical portion 8, the insertion portion 23 extends from the inside X1 side of the cylindrical portion 8 to the outside X2 side in the tool length direction L (inside-outside direction X). In this embodiment, the tool length DC1 of the insertion portion 23 is formed to be longer by an operating width than the length DC2 which is the sum of the length DC3 of the cylindrical portion 8 in the inside-outside direction X and the length DC4 of the cutting tool 24 (more specifically, the length of the portion of the insertion portion 23 from the tool tip side L1 to the tool base end side L2 in the cutting tool 24) which is described later.

[0033] An operating section 21 is continuously provided on the tool base end side L2 of the insertion section 23, and the operating section 21 is equipped with a gripping section 21A for the operator to hold with their hand. Therefore, as shown in Figure 4, when the removal tool 1 is inserted into the cylindrical section 8 from the outside side X2 and the entire cutting section 24A is positioned on the inside side X1 of the cylindrical section 8, the entire operating section 21 can be positioned on the outside side X2 of the cylindrical section 8. Thus, even when operating the operating section 21 so that the entire cutting section 24A is positioned on the inside side X1 of the cylindrical section 8, it is not necessary to insert the operating section 21 equipped with the gripping section 21A into the cylindrical section 8, and the operating section 21 can be operated from the outside side X2 of the cylindrical section 8. In this embodiment, the entire operating section 21 is formed in a simple rod shape, similar to the insertion section 23. However, the gripping section 21A of the operating section 21 may be made with an uneven shape or surrounded with a non-slip material to prevent the operator's hand from slipping, and the operating section 21 may have a different configuration from the parts other than the gripping section 21A or the insertion section 23.

[0034] As shown in Figures 1 and 2, the cutting portion 24A extends in the length direction L of the tool with its cutting edge facing the base end L2 of the tool and is inserted into the gap G from the inside X1 (see Figure 6), thereby enabling it to cut the filler material 14 filling the gap G. In this embodiment, as shown in Figure 2, the cutting portion 24A is formed in a tapered shape that becomes narrower towards the cutting edge side (tool base end side L2). Furthermore, the cutting portion 24A is formed in a flat plate shape and is equipped with a sawtooth-shaped blade at its edge. In this way, the cutting portion 24A, which is formed in a plate shape, is formed in a tapered shape and is equipped with sawtooth-shaped teeth at its edge, making it easier to cut the filler material 14 that is filling the gap G when the cutting portion 24A is inserted into the gap G.

[0035] The cutting tool 24 is bent in such a way that the outer surface of the cutting portion 24A (the surface facing one end W1) is positioned closer to one end W1 than the outer surface of the fastener 26 (the surface facing one end W1) in the vertical width direction W of the tool. The cutting tool 24 comprises a mounting portion 24B fastened to the connecting portion 25 by a fastener 26, a cutting portion 24A for cutting the filler material 14, and an inclined portion 24C located between the mounting portion 24B and the cutting portion 24A, which is inclined so that it is positioned towards one end W1 as the tool base end L2 approaches. Due to the presence of the inclined portion 24C, the cutting portion 24A is positioned towards one end W1 relative to the mounting portion 24B, and as a result, the outer surface of the cutting portion 24A is positioned towards one end W1 relative to the outer surface of the fastener 26 in the vertical width direction W of the tool. In this embodiment, the outer surface of the cutting portion 24A is positioned at one end W1 of the tool's vertical width direction W relative to the outer surface of the fastener 26. However, it may also be positioned at the same location as the outer surface of the fastener 26 in the tool's vertical width direction W.

[0036] Next, we will explain the removal method for removing the cap member 5 using the removal tool 1. The removal method involves a cutting step (see Figures 4 to 6) in which the filler material 14 is cut using a removal tool 1, and a removal step (see Figure 7) in which the cap member 5 is removed with the filler material 14 cut. In this embodiment, a first removal step (see Figure 3) is performed to remove the cap body 10 of the cap member 5 before the cutting step, and after the cutting step, a removal step (hereinafter referred to as the second removal step) is performed to remove the cylindrical portion 8 and the extended portion 9 of the cap member 5 with the filler material 14 cut.

[0037] As shown by the solid line in Figure 3, before the first removal process is performed, the cap body 10 is fixed to the base body 7 using screws 11. In the first removal step, the worker releases the fastening with screws 11 and removes the cap body 10 from the base body 7 as shown by the dashed line in Figure 3. By removing the cap body 10 in this way, the outer side X2 of the cylindrical part 8 opens up, allowing the insertion cutting portion 22 of the removal tool 1 to be inserted into the cylindrical part 8 from the outer side X2.

[0038] In the cutting process, as shown in Figures 4 to 6, the insertion cutting section 22 is inserted into the cylindrical section 8 from the outside X2 to position the cutting section 24A on the inside X1 of the cylindrical section 8 (see Figure 4). Then, the operating section 21 is moved radially outward R1 (see Figure 5) and also moved to the outside X2 to insert the cutting section 24A between the duct 4 and the cylindrical section 8 (see Figure 6). After that, the operating section 21 is operated to cut the filler material 14 that is filled between the duct 4 and the cylindrical section 8 with the cutting section 24A.

[0039] In other words, during the cutting process, the operator grasps the operating unit 21 by hand and operates the removal tool 1 to insert the insertion cutting unit 22 into the cylindrical unit 8 from the outside X2, as shown in Figure 4. At this time, the insertion cutting unit 22 is moved to the inside X1 until the cutting unit 24A is located on the inside X1 of the cylindrical unit 8. Next, as shown in Figure 5, the operating unit 21 is moved radially outward R1 to face the cutting unit 24A toward the gap G, and then as shown in Figure 6, the operating unit 21 is moved to the outside X2 to insert the cutting unit 24A into the gap G. By inserting the cutting unit 24A into the gap G in this way, a portion of the filler material 14 in the gap G can be cut. After that, the cutting unit 24A is withdrawn from the gap G, shifted circumferentially, and then reinserted into the gap G, and this process is repeated to sequentially cut the filler material 14 in the gap G along the circumferential direction. By performing this cutting process, all or almost all of the filler material 14 in the gap G can be cut, so that the cylindrical portion 8 is no longer fixed to the duct 4 by the filler material 14, or the fixing force of the filler material 14 is weakened.

[0040] In the second removal step, the cylindrical portion 8 is pulled out of the duct 4, and the extended portion 9 is removed together with the cylindrical portion 8, thereby removing the remaining part of the cap member 5 (base body 7). Since the filler material 14 has been cut in the cutting step performed before this second removal step, it is easier to pull out the cylindrical portion 8 from the duct 4. Therefore, in the second removal step, the cylindrical portion 8 can be easily pulled out of the duct 4, and by pulling out the cylindrical portion 8 in this way, the extended portion 9 which is integrally formed with the cylindrical portion 8 is also removed, and the entire cap member 5, including the cap body 10 that was removed earlier in the first removal step, can be removed from the duct 4.

[0041] Thus, in the cutting step performed before the second removal step, the insertion cutting part 22 is inserted into the cylindrical part 8 from the outside X2 by operating the operating part 21, positioning the cutting part 24A on the inside X1 of the cylindrical part 8. Then, by moving the operating part 21 radially outward R1 and also moving it to the outside X2, the cutting part 24A can be inserted into the gap G formed between the duct 4 and the cylindrical part 8. With the cutting part 24A inserted in this way, the filler material 14 in the gap G can be cut from the inside X1, and the filler material 14 can be cut without peeling back the extended part 9 of the cap member 5. Therefore, in the second removal step, the cap member 5, which was fixed to the duct 4 by the filler material 14, can be easily removed.

[0042] [Another embodiment] Other embodiments of the present invention will now be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.

[0043] (1) In the above embodiment, a configuration in which the operating unit 21 is equipped with a gripping unit 21A for the operator to hold with their hand was described as an example. However, the configuration is not limited to this. For example, as shown in Figure 8, the operating unit 21 may be equipped with a tool connection unit 21B for connecting to an electric power tool 28 equipped with a rotary drive unit such as a motor, and the power tool 28 may be configured to swing the tool connection unit 21B around an axis P along the vertical width direction W of the tool. Alternatively, the power tool 28 may perform an operation other than swinging the tool connection unit 21B around an axis P along the vertical width direction W of the tool, for example, by reciprocating the tool connection unit 21B linearly in the length direction L of the tool.

[0044] (2) In the above embodiment, an example was described in which the cutting portion 24A is formed as a flat plate and is linear in the direction of the tool length. However, the configuration is not limited to this. For example, as shown in Figure 9, the cutting portion 24A may be formed in an arc shape that follows the outer surface of the cylindrical portion 8 when the insertion cutting portion 22 is inserted into the cylindrical portion 8, in the view from the inside to the outside. In this case, it is sufficient that the cutting portion 24A follows the outer surface of the cylindrical portion 8, and the curvature of the cutting portion 24A may be the same as the curvature of the outer surface of the cylindrical portion 8, or the curvature of the cutting portion 24A may be the same as the inner surface of the duct 4, or it may be an intermediate curvature between the curvature of the outer surface of the cylindrical portion 8 and the curvature of the inner surface of the duct 4.

[0045] (3) In the above embodiment, a configuration in which the cylindrical portion 8 comprises an inner cylindrical portion 16 and an outer cylindrical portion 17 was described as an example. However, the cylindrical portion 8 may also be configured to consist only of the outer cylindrical portion 17 of the inner cylindrical portion 16 and the outer cylindrical portion 17. In this case, the thickness DA2 of the cylindrical portion 8 will be the thickness of the outer cylindrical portion 17, and the set interval DA1, which is the distance between the insertion portion 23 and the cutting portion 24A, should be greater than the thickness of the outer cylindrical portion 17.

[0046] (4) In the above embodiment, a configuration in which the cutting portion 24A is tapered was described as an example. However, the configuration is not limited to this. For example, the shape of the cutting portion 24A may be changed as appropriate, such as making the cutting portion 24A a rectangle with a constant width in the tool length direction L.

[0047] (5) In the above embodiment, an example was described in which the cutting tool 24 is bent so that the cutting portion 24A is biased toward one end W1 in the vertical width direction W of the tool relative to the mounting portion 24B. However, in cases where there is no portion protruding from the mounting portion 24B toward one end W1 in the vertical width direction W of the tool, such as when the mounting portion 24B is welded to the connecting portion 25, the cutting tool 24 may be formed in a straight line along the length direction L of the tool in a side view, so that the cutting portion 24A and the mounting portion 24B are in the same position in the vertical width direction W of the tool. [Explanation of Symbols]

[0048] 1 Removal tool 2 walls 3 Through hole 4 ducts 5 Cap member 8. Cylindrical part 9 Extension 21 Control section 21A Gripping part 21B Tool connection section 22 Insertion and cutting section 23 Insertion part 24 Cutting tools 24A cutting section 24B Mounting section 25 Connecting part 26 Fastening part DA1 setting interval DA2 Thickness F Filling material G Gap L (Tool length direction) L1 Tool tip side L2 Tool base end side W Tool vertical direction W1 One end side X1 Internal Side X2 External side

Claims

1. A removal tool that cuts the filler material filling the gap formed between a duct inserted from the inside into a wall penetration hole and the cylindrical portion of a cap member inserted into the duct from the outside, the gap which is closed on the outside by an extended portion that extends along the wall from the outer end of the cylindrical portion, thereby enabling the removal of the cap member. An operating section located on the base end of the tool, The tool is equipped with an insertion and cutting section positioned at the tip and which can be inserted into the cylindrical portion from the outside, The insertion and cutting portion is provided continuously with the tool tip side of the operating portion, and the insertion portion extends in the tool length direction from the outside through the cylindrical portion of the cap member so that its tip can be freely positioned to the inside of the cylindrical portion, A removal tool having a cutting portion which is provided at a set interval in the vertical width direction of the tool perpendicular to the tool length direction with respect to the tip side of the insertion portion, and which extends in the tool length direction with the cutting edge side facing the base end of the tool and is inserted into the gap from the inside side to cut the filler material filling the gap.

2. The removal tool according to claim 1, wherein the operating section is provided with a gripping section for the operator to hold in their hand.

3. The removal tool according to claim 1, wherein the operating part is provided with a drive connection part for connecting to a power tool having a driving force to move the operating part.

4. The aforementioned insertion and cutting portion is A plate-shaped cutting tool having a mounting portion on the tip end and a cutting portion on the base end, A connecting portion extending from the tool tip side of the insertion portion to one end side in the vertical width direction of the tool, The cutting tool is equipped with a fastener that fastens the mounting portion of the cutting tool from one end in the vertical direction of the tool, The removal tool according to any one of claims 1 to 3, wherein the cutting tool is bent in such a way that the cutting portion is biased toward the one end in the vertical direction of the tool relative to the mounting portion, so that the outer surface of the cutting portion is located at the same position as or toward the one end side of the fastener in the vertical direction of the tool.

5. The removal tool according to any one of claims 1 to 3, wherein, when the insertion cutting portion is inserted into the cylindrical portion, the shape of the wall when viewed in the inward and outward directions is formed in an arc shape that follows the outer surface of the cylindrical portion.

6. The removal tool according to any one of claims 1 to 3, wherein the cutting portion is formed in a tapered shape that becomes narrower towards the cutting edge.

7. A removal method using the removal tool described in any one of claims 1 to 3, A cutting step in which the insertion cutting portion is inserted into the cylindrical portion from the outside so that the cutting portion is positioned on the inside side of the cylindrical portion, the operating portion is moved radially outward and also moved to the outside so that the cutting portion is inserted between the duct and the cylindrical portion, and then the operating portion is operated to cut the filler material that is filled between the duct and the cylindrical portion with the cutting portion, A removal method comprising the steps of removing the cylindrical portion from the duct and removing the cap member.

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