JP7416421B2 - Anchor pilot hole forming method and scraping tool used therein - Google Patents

Description

The present invention relates to a technique for forming a pilot hole for attaching an anchor to an existing waterproof base having an existing waterproof layer laid on the upper surface side.

In waterproofing renovations of buildings where an existing waterproof layer has been laid on top of the existing waterproof foundation, pilot holes are formed in the waterproof foundation to attach anchors, and a new waterproof layer is laid on top of the existing waterproof layer. However, the anchor fixing method, in which the new waterproof layer is fixed to the waterproof base using anchors, is often used. In this anchor fixing method, a pilot hole is generally formed in the existing waterproof foundation using a vibrating drill that can strike in the axial direction while rotating; Noise will be generated when doing so.

Incidentally, in recent years, construction methods that generate noise are increasingly being avoided when waterproofing renovations of hospitals and apartment complexes. In such cases, an adhesive method may be used in which a new waterproof layer is bonded to the top of the existing waterproof layer using an adhesive without using anchors. However, with this adhesive method, it takes time and effort to adjust the unevenness of the surface to which the new waterproof layer is bonded (the top surface of the existing waterproof layer), and the existing waterproof layer does not adhere to the existing waterproof base in the first place. There are problems such as quality cannot be ensured unless it is fixed.

Therefore, in the anchor fixing method, a rotary drill that only rotates and a special drilling tool (a commercially available drilling tool with a drill bit, etc.) attached to the tip of the drill are used, and the impact is applied with the rotary drill. It has been proposed to form a pilot hole in the waterproof substrate while avoiding noise generation by rotating the drilling tool while rotating and drilling the waterproof substrate together with the waterproof layer using the rotating drilling tool. .

In the above-mentioned anchor fixing method, when drilling a hole in the waterproof base together with the waterproof layer, the drilling tool will stick to the constituent materials (asphalt, urethane, etc.) of the existing waterproof layer, so if you do not clean the drilling tool frequently, There is a problem that the performance of the drilling tool is significantly reduced and the drilling work takes a long time. In particular, when the constituent material of the existing waterproof layer is asphalt, it takes a considerable amount of time to clean the drilling tool due to burning of the asphalt, and the problem of the time required for drilling becomes significant. By the way, for example, it is possible to remove the existing waterproof layer by using a combing machine, etc., but in that case, the area to be removed will be wide, requiring extensive rain curing, and will further damage the waterproof base. The need for surface treatment also arises.

In view of this situation, the main object of the present invention is to be able to avoid both the impact and the sticking of the material of the waterproof layer to the drilling tool, and to do so in a short and efficient manner while suppressing the generation of noise. The object of the present invention is to provide a method for forming a pilot hole for an anchor, which can form a pilot hole in a waterproof base, and a scraping tool used therein.

A first feature of the present invention is a method for forming a pilot hole for an anchor, which comprises forming a pilot hole for attaching an anchor to an existing waterproof base on which an existing waterproof layer is laid on the upper surface side.
a waterproof layer removal step of using a scraping tool to scrape off a target area of the waterproof layer directly above the planned hole formation location of the waterproof base and surrounding areas;
After the waterproofing layer removal step is performed, a waterproofing base drilling step is provided, in which a hole is drilled at a portion of the waterproofing foundation where the pilot hole is to be formed using a drilling tool to form a pilot hole.

According to this configuration, in the waterproof layer removal process that is performed prior to the waterproof base drilling process, a relatively small area to be removed consisting of the area directly above the location where the waterproof base hole is planned to be formed in the waterproof layer and the surrounding area Since it is scraped off with a scraping tool, the target area of the waterproof layer can be removed in a short time without the need for large-scale rain curing or surface treatment.
Then, in the waterproof base drilling process that is executed after the waterproof layer removal process, it is possible to drill holes in the waterproof base where the waterproof layer has been removed and where the pilot hole is to be formed, which is exposed to the outside, in a rotating state. A pilot hole can be formed by drilling with a special drilling tool without applying a blow that causes noise.
Therefore, it is possible to avoid both impact and sticking of the material of the waterproof layer to the drilling tool, and it is possible to efficiently form a pilot hole in the waterproof base in a short time while suppressing noise generation. can.

A second characteristic configuration of the present invention is that in the case where an existing heat insulating layer is provided between the waterproof layer and the waterproof base,
After execution of the waterproof layer removal step and before execution of the waterproof base drilling step, use a cutting tool to cut out a target area of the waterproof base in the heat insulating layer, which is a portion immediately above the planned hole formation location and surrounding areas thereof. The method includes a step of cutting out the heat insulating layer to form a through hole.

According to this configuration, in the heat insulation layer cutting process that is performed after the waterproof layer removal process and before the waterproof base drilling process, the area directly above the planned hole formation location of the waterproof base in the heat insulation layer and the surrounding area. Since a relatively small target area consisting of parts is cut out with a cutting tool, the waste of the insulation layer is not scattered around, as when drilling a hole in a waterproof base together with the insulation layer with a drilling tool, and the hole drilling tool Through-holes can be formed without debris from the heat insulating layer becoming stuck. Therefore, even if an existing heat insulating layer is provided between the waterproof layer and the waterproof base, the pilot hole can be formed in the waterproof base in a short time.

A third characteristic configuration of the present invention is that the scraping tool includes a cylindrical main body portion having an opening at the tip to be opened to the outside, and a rotation operation portion for rotating the main body portion around the cylindrical axis. and a scraping plate that is attached to the distal end side of the interior of the main body part so as to divide the opening part,
In the waterproof layer removal step, the tip of the main body is pressed against the removal target portion of the waterproof layer while the rotation operation unit is operated to rotate the main body, thereby removing the tip of the main body. The removal target portion of the waterproof layer is scraped off using the scraping plate.

According to this configuration, in the waterproof layer removal process, the scraping tool that includes the above-mentioned cylindrical main body, a rotation operation part, and a scraping plate is used, and the rotation operation part is operated to rotate the main body. By pressing the tip of the main body against the area to be removed of the waterproof layer, the scraping plate on the tip side of the main body can quickly remove the area to be removed of the waterproof layer surrounded by the edge of the opening at the tip of the main body. It can be scraped off. In addition, while the scraped off waterproof layer is retained inside the cylindrical main body, it is possible to prevent the scraped off waterproof layer from scattering around.

A fourth feature of the present invention resides in that, in the scraping tool, the scraping plate is disposed at a position recessed toward the inside of the main body from the opening edge of the distal end of the main body.

According to this configuration, in the waterproof layer removal step, the opening edge of the tip of the main body is removed from the waterproof layer a little before the removal target area of the waterproof layer is scraped off with the scraping plate on the tip side of the main body. It can be made to enter the outer peripheral edge of the site to be removed. Therefore, while positioning the tip of the main body at the area to be removed of the waterproof layer using the opening edge of the tip of the main body, the area to be removed of the waterproof layer can be efficiently scraped with the shaving plate on the tip side of the main body. It can be dropped.

A fifth characteristic configuration of the present invention is that in the scraping tool, one or more of the scraping plates are detachably attached.

According to this configuration, the number of scraping plates can be arbitrarily changed depending on the actual situation of the work by attaching or removing the scraping plates from the main body. For example, by increasing the number of scraping plates, the portion of the waterproof layer to be removed can be finely crushed.

A sixth characteristic configuration of the present invention is that the scraping tool includes a cylindrical main body portion having an opening at the tip to be opened to the outside, and a rotation operation portion for rotating the main body portion around the cylindrical axis. and a shaving plate that is detachably attached to the distal end side of the interior of the main body part in a state that divides the opening part,
The scraping tool is configured to function as the cutting tool when all the scraping plates are removed,
In the waterproof layer removal step, the scraping plate is attached to the main body, and while the rotation operation unit is operated to rotate the main body, the tip of the main body is attached to the part of the waterproof layer to be removed. By pressing, the portion to be removed of the waterproof layer is scraped off with the scraping plate on the tip side inside the main body portion;
In the heat insulating layer cutting step, all the scraping plates are removed from the main body, and while the rotation operation unit is operated to rotate the main body, the tip of the main body is cut out of the heat insulating layer. By pressing against the part, the cutting tool forms the through hole by cutting out the target part of the heat insulating layer at the opening edge of the tip of the main body part.

According to this configuration, the scraping tool that includes the above-mentioned cylindrical main body, a rotary operating section, and a scraping plate is used, and in the waterproof layer removal step, the scraping plate is attached to the main body and the rotating operating section is operated. By pressing the tip of the main body against the part of the waterproof layer to be removed while rotating the main body, the scraping plate on the tip side of the main body can remove the waterproof layer surrounded by the edge of the opening at the tip of the main body. The target area can be removed in a short time.
In the heat insulation layer cutting process, all the shaving boards are removed from the main body, and the tip of the main body is pressed against the part of the heat insulation layer to be cut out while rotating the main body by operating the rotation operation unit. By making the dropper function as a cutting tool, a through hole can be formed in a short time by cutting out a target part of the heat insulating layer at the opening edge of the tip of the main body.
Therefore, the scraping tool can also be used as a cutting tool to efficiently form pilot holes in the waterproof base.

A seventh characteristic configuration of the present invention is a scraping tool used in the method for forming a pilot hole for an anchor according to any one of the first to sixth characteristic configurations,
a cylindrical main body having an opening at its tip to be opened to the outside; a rotary operation section for rotating the main body around a cylinder axis; and the opening divided into a distal end side inside the main body. The main feature is that it is provided with a sharpening plate that can be attached in a state where the

According to this configuration, in the waterproof layer removal step, by pressing the tip of the main body against the part to be removed of the waterproof layer while rotating the main body by operating the rotation operation part, the scraping plate on the tip side of the main body can be removed. With this, it is possible to construct a scraping tool that can scrape off the removal target portion of the waterproof layer surrounded by the edge of the opening at the tip of the main body in a short time.

Diagram showing the implementation site of the method for forming pilot holes for anchors (a) Front view of the scraping tool, (b) sectional view taken along line IIb-IIb, (c) Bottom view of the scraping tool Diagram schematically showing the waterproof layer removal process Diagram schematically showing the process of drilling holes in a waterproof base Diagram schematically showing the insulation material cutting process (a) A perspective view showing a scraping tool according to another embodiment, (b) a perspective view showing a scraping tool according to another embodiment, (c) a bottom view of a scraping tool according to another embodiment. (a) A perspective view showing a scraping tool according to another embodiment, (b) a perspective view showing a scraping tool according to another embodiment, (c) a bottom view of a scraping tool according to another embodiment. A diagram schematically showing a waterproofing repair method using the method of forming pilot holes for anchors. A diagram schematically showing a waterproofing repair method using the method of forming pilot holes for anchors.

An embodiment of the method for forming a pilot hole for an anchor according to the present invention will be described based on the drawings.
As shown in Fig. 4, this method for forming pilot holes for anchors involves inserting anchors 4 (see Figs. 8 and 9) for use in waterproofing repairs into an existing waterproof base 2 on which an existing waterproof layer 1 has been laid on the upper surface. This method involves forming a pilot hole A for installation. The existing waterproof layer 1 is composed of, for example, sanded asphalt roofing, a urethane coating, or the like. In the illustrated example, the existing waterproof layer 1 is composed of an asphalt roofing with sand, and the existing waterproof base 2 is composed of a concrete slab.

This method of forming a pilot hole for an anchor includes a waterproof layer removal step (see FIG. , see FIG. 3), and after the waterproofing layer removal step, a waterproof base drilling step (see FIG. 4) in which a pilot hole A is formed by drilling a hole in the waterproof base 2 at a location where a pilot hole is to be formed using a drilling tool 20. ) and are provided.

Further, depending on the building, as shown in FIG. 5, an existing heat insulating layer 3 may be provided between an existing waterproof layer 1 and an existing waterproof base 2. The existing heat insulating layer 3 is made of, for example, a glass wool board. In such a case, after executing the waterproof layer removal process and before executing the waterproof base drilling process, use a cutting tool to cut out the target area 3A of the heat insulating layer 3, including the area directly above the planned hole formation location of the waterproof base 2. A step of cutting out the heat insulating layer is provided at 30 to form a through hole.

Details of the waterproof layer removal process, the waterproof base drilling process, and the heat insulation layer cutting process will be explained in order below.

(Waterproof layer removal process)
In this waterproof layer removal step, as shown in FIG. 3, a portion 1A of the waterproof layer 1 to be removed is scraped off using a scraping tool 10. The removal target portion 1A of the waterproof layer 1 is set as a small cylindrical portion consisting of a portion directly above the planned hole formation portion of the waterproof base 2 and a predetermined area around the portion (surrounding portion).

As shown in FIGS. 1 and 2, the scraper 10 includes a cylindrical main body 11 having an opening 11a at a tip 11A for opening the inside to the outside, and a cylindrical main body 11 that can be rotated around a cylinder axis X. A rotary operation section 12 for rotating the main body section 11 and a scraping plate 13 attached to the distal end side of the interior of the main body section 11 in a state that divides the opening section 11a are provided. The diameter of the opening 11a on the tip side of the main body portion 11 is set to be approximately the same as the diameter of the portion 1A of the waterproof layer 1 to be removed.

The main body 11 is made of a cylindrical member made of stainless steel (an example of metal), and has a distal end 11A that is open to the outside through an opening 11a, and a proximal end 11B that is closed. The annular opening edge 11b of the distal end portion 11A of the main body portion 11 is formed in a shape that tapers toward the distal end. Configured to cut. Therefore, when scraping off the removal target portion 1A of the waterproof layer 1 with the scraper 10, the tip 11A of the main body portion 11 is positioned at the removal target portion 1A of the waterproof layer 1 by the annular opening edge 11b. I can do it.

The rotation operation unit 12 can be configured, for example, from a hexagonal column-shaped bit that can be rotated with a rotation operation tool T1 such as an impact driver. The rotation operation section 12 is provided in a state of protruding outward from the center of the end surface of the base end 11B of the main body section 11 along the cylinder axis X direction. The rotation operation part 12 is fixed to the base end part 11B of the main body part 11 by suitable fixing means such as welding. A large window 14 for exposing the inside of the main body 11 to the outside is provided at a portion of the peripheral wall of the main body 11 closer to the proximal end than the distal end 11A.

The shaving plate 13 is made of a stainless steel plate or the like having a thickness greater than that of the main body 11, and is provided on the distal end side inside the main body 11 in a vertical position extending along the cylinder axis X direction. The scraping plate 13 is disposed at a position recessed toward the inside of the main body 11 (towards the proximal end 11B) from the opening edge 11b of the distal end 11A of the main body 11. Specifically, the distal end edge 13d of the scraping plate 13 is located on the proximal end 11B side (the upper side in the figure) which is the inner side of the main body 11 by a predetermined distance from the opening edge 11b of the distal end 11A of the main body 11. ). The proximal edge of the scraping plate 13 is disposed at a position closer to the distal end than the window 14 in the main body 11 . Incidentally, the tip end edge 13d of the scraping plate 13 is configured as a highly rigid rectangular cross-section portion having a sufficient thickness.

In this waterproof layer removal process, as shown in FIGS. 3(a) to 3(c), the main body of the scraping tool 10 is operated by operating the rotary operating section 12 of the scraping tool 10 using the rotary operating tool T1. By pressing the distal end 11A of the main body 11 of the scraping tool 10 against the removal target area 1A of the waterproof layer 1 while rotating the scraper 11, the opening edge 11b of the distal end 11A of the main body 11 scrapes the main body 11. While positioning the tip portion 11A at the removal target portion 1A of the waterproof layer 1, the removal target portion 1A of the waterproof layer 1 is scraped off with the tip edge 13d of the scraping plate 13 on the tip side inside the main body portion 11. At this time, the scraps of the waterproof layer 1 are prevented from scattering to the outside by the peripheral wall of the main body 11 of the scraper 10.
In this way, the relatively small portion 1A of the waterproof layer 1 to be removed can be efficiently scraped off in a short time using the scraping tool 10, without requiring large-scale rain curing or base treatment, and the removal target area 1A of the waterproof layer 1 can be efficiently scraped off in a short period of time with the scraping tool 10. The location where the hole is to be formed can be appropriately exposed to the outside.

(Waterproof base drilling process)
In the waterproof base drilling process that is executed after the waterproof layer removal process, as shown in FIG. A pilot hole A is formed. The hole drilling tool 20 is a commercially available rod-shaped tool different from the above-mentioned scraping tool 10. The proximal end side of the rod-shaped body 21 of the hole drilling tool 20 is provided with a rotary operation part 22 that can be rotated by a rotary operation tool T2 such as a rotary drill, and the tip side of the rod-shaped body 21 is equipped with a rotary operation part 22 that can be freely attached and detached. A bifurcated hole drilling portion 21A made of a drill bit or the like is provided.

In this waterproof base drilling process, as shown in FIGS. 4(a) to 4(c), the rotary operating part 22 of the drilling tool 20 is operated by the rotating operating tool T2, and the rod-like shape of the drilling tool 20 is While rotating the main body 21, press the bifurcated drilling portion 21A on the tip side of the drilling tool 20 against the planned hole formation location of the waterproof base 2 where the waterproof layer 1 has been removed and is exposed to the outside. Then, a pilot hole A is formed by drilling a hole in the waterproof base 2 at a location where a pilot hole is to be formed using the bifurcated hole drilling portion 21A on the tip side of the rod-shaped main body 21.
In this way, the pilot hole A can be formed in a short time using the drilling tool 20 at the location where the pilot hole is to be formed in the waterproof base 2.

(insulation layer cutting process)
As mentioned above, depending on the building, as shown in FIG. 5, an existing heat insulating layer 3 may be provided between the existing waterproof layer 1 and the existing waterproof base 2.
Therefore, in such a case, after executing the waterproof layer removal process (see Figure 3) and before executing the waterproof base drilling process (see Figure 4), the location where the pilot hole is planned to be formed in the waterproof base 2 in the heat insulating layer 3 is A heat insulation layer cutting step is performed in which the cutout target region 3A including the region directly above is cut out using the cutter 30 to form a through hole.

The cutout target region 3A of the heat insulating layer 3 is set as a small cylindrical region consisting of a region directly above the planned hole formation location of the waterproof base 2 and a region in a predetermined range around the region (surrounding region). In this embodiment, the region 3A of the heat insulating layer 3 to be cut out is set in the same range as the region 1A of the waterproof layer 1 to be removed in plan view. Incidentally, in this embodiment, the cutting tool 30 is the same as the scraping tool 10 except that it is not provided with the scraping plate 13, so similar components are denoted by the same reference numerals, and the explanation thereof will be omitted. do.

In this heat insulation layer cutting step, as shown in FIGS. 5(a) to 5(c), the rotation operating part 12 of the cutting tool 30 is operated by the rotating operating tool T1 to rotate the main body 11 of the cutting tool 30. In this state, the tip 11A of the main body 11 of the cutting tool 30 is pressed against the cutout target part 3A of the heat insulating layer 3 which has been exposed to the outside after the waterproof layer 1 has been removed. A through hole is formed by cutting out the target section 3A of the heat insulating layer 3 at the opening edge 11b.
In this way, the cutout target portion 3A of the heat insulating layer 3 can be easily and quickly cut out using the cutter 30 to form a through hole, and the portion where the pilot hole is planned to be formed in the waterproof base 2 can be appropriately exposed to the outside. can.

In the cutter 30, the window 14 that exposes the inside of the main body 11 to the outside allows the cylindrical cutout target part 3A, which has been cut out from the heat insulating layer 3 and entered the inside of the main body 11, to the outside of the main body 11. It functions suitably as a discharge port for discharge.

Next, a waterproofing repair method using the anchor pilot hole forming method of the present invention will be explained with reference to FIGS. 8 and 9.

FIG. 8 shows a waterproofing repair method in which a new waterproof layer 1' is laid on top of the existing waterproof layer 1. In this waterproofing repair method, first, the above-mentioned waterproof layer removal process and waterproof base drilling process of the anchor hole forming method of the present invention are carried out, and the existing waterproof base with the existing waterproof layer 1 laid on the top side is After removing the portion 1A of the waterproof layer 1 to be removed at the appropriate location in step 2, a pilot hole A is formed (see FIG. 4).
Then, after fixing the disk-shaped fixing plate 5 having an adhesive layer made of thermoplastic resin adhesive (hot melt adhesive) on the upper surface to the prepared hole A using the anchor 4, the upper surface side of the fixing plate 5 is fixed. Lay a new waterproof layer 1'.
Thereafter, the adhesive layer on the upper surface of the fixed plate 5 is heated and melted using an induction heating device or the like from above the newly installed waterproof layer 1', and the newly installed waterproof layer 1' is adhesively fixed to the upper surface of the fixed plate 5.

In Figure 9, a new waterproof layer 1' is laid with a ventilation layer 6 interposed between it and the top surface of the existing waterproof layer 1, and moisture, etc. in the waterproof base 2 is released to the outside through the ventilation layer 6, etc. This shows a waterproofing repair method in which a degassing tower 8 is installed. In this waterproofing repair method, first, the above-mentioned waterproof layer removal process and waterproof base drilling process are carried out, and the waterproof layer 1 is to be removed at a suitable location on the existing waterproof base 2 on which the existing waterproof layer 1 has been laid on the top side. After removing the portion 1A, a prepared hole A is formed (see FIG. 4). At this time, in order to ensure that the areas from which the existing waterproof layer 1 has been removed are evenly distributed, in the existing waterproof layer 1, not only the removal target area 1A that forms the pilot hole A, but also the area that does not form the pilot hole A. 1B can also be removed with the scraper 10. In addition, the portion 1C of the existing waterproof layer 1 where the degassing tower 8 is scheduled to be installed is also removed.

Then, a ventilation layer 6 made of a breathable mat-like member or the like is laid on the upper surface side of the existing waterproof layer 1 except for the site 1C where the deaeration tower 8 is planned to be installed, and the deaeration tower 8 is installed. Further, an insulating sheet 7 is laid on the upper surface of the ventilation layer 6.
Thereafter, the fixing plate 5 described above is fixed in the prepared hole A using the anchor 4, and a new waterproof layer 1' is laid on the upper surface side of the fixing plate 5. Then, the adhesive layer on the upper surface of the fixed plate 5 is heated and melted using an induction heating device or the like from above the newly installed waterproof layer 1', and the newly installed waterproof layer 1' is adhesively fixed to the upper surface of the fixed plate 5.

In this waterproofing repair method, as shown by the arrows in FIG. It is possible to modify the waterproof structure so that moisture, etc. in the waterproof base 2 can be appropriately released to the outside through the ventilation layer 6 between '' and the degassing tower 8.
As described above, the method for forming a pilot hole for an anchor according to the present invention can be suitably used in various waterproofing repair methods in which a new waterproof layer 1' is laid on the upper surface side of an existing waterproof layer 1.

In addition, in each of the above-mentioned waterproofing repair methods, if an existing heat insulating layer 3 is provided between the existing waterproof layer 1 and the existing waterproof base 2, pilot holes are drilled at appropriate locations on the existing waterproof base 2. When forming A, a heat insulating layer cutting step (see FIG. 5) may be performed.

[Another embodiment]
Other embodiments of the present invention will 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.

(1) As an improvement to the above-described embodiment, as shown in FIGS. 6 and 7, in the scraping tool 10, a scraping plate 13 may be detachably attached to the main body portion 11.

In the example shown in FIG. 6, the scraping tool 10 is equipped with two types of scraping plates 13: one fixed scraping plate 13A and one removable scraping plate 13B. The number of scraping plates 13 can be changed by attaching or removing 13B from the main body 11. Therefore, there are two usage modes in which one scraping plate 13A is used to scrape off the part 1A to be removed of the waterproof layer 1 (see FIG. 6(a)), and two scraping plates 13A and 13B forming a cross shape when viewed from the bottom are used to scrape off the waterproof layer 1. It is possible to arbitrarily select a mode of use in which the removal target part 1A of 1 is scraped off (see FIGS. 6(b) and 6(c)).

Although various configurations can be adopted as the attachment/detachment mechanism for attaching and detaching the scraping plate 13B to and from the main body portion 11, the following configurations can also be adopted.
For example, a slit 11c is formed in the peripheral wall of the tip end 11A of the main body 11 for inserting the cutting board 13B into the main body 11 through the opening 11a. Further, a slit 13b into which a fixed type scraping plate 13a is inserted is formed in the intermediate portion of the removable scraping plate 13B in the width direction (left and right direction in the figure). Further, at both ends of the scraping plate 13B in the plate width direction, with the scraping plate 13B inserted into the inside through the opening 11a of the main body 11, there are provided abutment on the peripheral edge of the slit 11c on the outside of the peripheral wall of the main body 11. A contacting position holding plate portion 13c is formed.

In this way, in the waterproof layer removal process, one removable scraping plate 13B is attached to the main body part 11, and the removal target portion 1A of the waterproof layer 1 is scraped off using the two scraping plates 13A and 13B. Even if selected, the detachable scraping plate 13B will fall off from the tip 11A of the main body 11 when the tip 11A of the main body 11 of the scraping tool 10 is pressed against the removal target area 1A of the waterproof layer 1. Without any problem, the removal target portion 1A of the waterproof layer 1 can be scraped off using the two scraping plates 13A and 13B.

In the example shown in FIG. 7, one scraping plate 13 (an example of all the scraping plates 13) is detachably attached to the scraping tool 10. Therefore, by removing all the scraping plates 13 from the main body 11, this scraping tool 10 can function as a cutting tool 30 for cutting out the target section 3A of the heat insulating layer 3 in the heat insulating layer cutting process. . Although various configurations can be adopted as the attachment/detachment mechanism for attaching and detaching the scraping plate 13D to the main body portion 11, a configuration similar to that of the scraping plate 13B described above can be adopted.

Then, in the waterproof layer removal step (see FIG. 3), as shown in FIGS. 7(b) and 7(c), a scraping plate 13D is attached to the main body 11 of the scraping tool 10, and the scraping plate 13D is removed using the rotary operation tool T1. Pressing the tip 11A of the main body 11 of the scraping tool 10 against the removal target portion 1A of the waterproof layer 1 while rotating the main body 11 of the scraping tool 10 by operating the rotation operation part 12 of the removing tool 10. Then, the removal target portion 1A of the waterproof layer 1 can be scraped off with the tip edge 13d of the scraping plate 13D on the tip side inside the main body portion 11.

In addition, in the heat insulation layer cutting step (see FIG. 5), as shown in FIG. While rotating the main body 11 of the cutter 30 by operating the operation part 12, the tip 11A of the main body 11 of the cutter 30 is inserted into the heat insulating layer 3 exposed to the outside after the waterproof layer 1 has been removed. By pressing against the cut-out target area 3A, the scraping tool 10 functions as a cut-out tool 30, and the cut-out target area 3A of the heat insulating layer 3 is cut out with the opening edge 11b of the tip 11A of the main body 11 to form a through hole. can be formed.

Although FIGS. 6 and 7 show an example in which one sharpening plate 13 is detachably attached to the main body 11, it is of course possible to attach a plurality of sharpening plates 13 to the main body 11 in a detachable manner. Good too.
Further, when the scraping plate 13 is removed from the main body 11 and used, a slit filling member or the like may be attached to fill the slit 11c formed in the peripheral wall of the tip 11A of the main body 11.

1 Waterproof layer 1A Part to be removed 2 Waterproof base 3 Heat insulating layer 3A Part to be cut out 10 Dropper 11 Main body part 11A Tip part 11a Opening part 11b Opening edge 12 Rotating operation part 13 Scraping plate 20 Drilling tool 30 Cutting tool A Pilot hole X Cylinder axis

Claims (7)

A method for forming a pilot hole for an anchor, the method comprising: forming a pilot hole for attaching an anchor to an existing waterproof base on which an existing waterproof layer is laid on the upper surface side;
a waterproof layer removal step of using a scraping tool to scrape off a target area of the waterproof layer directly above the planned hole formation location of the waterproof base and surrounding areas;
A method for forming a pilot hole for an anchor, comprising: after performing the waterproof layer removing step, a waterproof base drilling step of forming a pilot hole by drilling a hole at the location where the pilot hole is to be formed in the waterproof base using a drilling tool. . In the case where an existing heat insulation layer is provided between the waterproof layer and the waterproof base,
After execution of the waterproof layer removal step and before execution of the waterproof base drilling step, use a cutting tool to cut out a target area of the waterproof base in the heat insulating layer, which is a portion immediately above the planned hole formation location and surrounding areas thereof. 2. The method for forming a pilot hole for an anchor according to claim 1, further comprising a step of cutting out a heat insulating layer to form a through hole. The scraping tool includes a cylindrical main body portion having an opening at the distal end portion to be opened to the outside, a rotation operation portion for rotating the main body portion around the cylindrical axis, and a distal end inside the main body portion. and a scraping plate attached to the side to divide the opening,
In the waterproof layer removal step, the tip side of the main body is pressed against the removal target portion of the waterproof layer while rotating the main body by operating the rotation operation section. The method for forming a prepared hole for an anchor according to claim 1 or 2, wherein the portion to be removed of the waterproof layer is scraped off using the scraping plate. 4. The method for forming a pilot hole for an anchor according to claim 3, wherein in the scraping tool, the scraping plate is disposed at a position recessed toward the inside of the main body rather than the opening edge of the distal end of the main body. 5. The method for forming a pilot hole for an anchor according to claim 3, wherein in the scraping tool, one or more of the scraping plates are detachably attached. The scraping tool includes a cylindrical main body portion having an opening at the distal end portion to be opened to the outside, a rotation operation portion for rotating the main body portion around the cylindrical axis, and a distal end inside the main body portion. a scraping plate that is detachably attached to the side and divides the opening;
The scraping tool is configured to function as the cutting tool when all the scraping plates are removed,
In the waterproof layer removal step, the scraping plate is attached to the main body, and while the rotation operation unit is operated to rotate the main body, the tip of the main body is attached to the part of the waterproof layer to be removed. By pressing, the portion to be removed of the waterproof layer is scraped off with the scraping plate on the tip side inside the main body portion;
In the heat insulating layer cutting step, all the scraping plates are removed from the main body, and while the rotation operation unit is operated to rotate the main body, the tip of the main body is removed from the heat insulating layer. 3. Forming a pilot hole for an anchor according to claim 2, wherein the cutting tool is used to cut out the target part of the heat insulating layer at the opening edge of the tip of the main body part by pressing against the part to form the through hole. Method. A scraping tool used in the method for forming a pilot hole for an anchor according to any one of claims 1 to 6,
a cylindrical main body having an opening at its tip to be opened to the outside; a rotation operating section for rotating the main body around a cylinder axis; and a divided opening on the internal tip side of the main body. A scraping tool that is equipped with a scraping plate that can be attached in a state where the scraper is attached.

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