JPH04323442A - Processing of anchor hole - Google Patents

Abstract

PURPOSE:To improve workability by sucking a cover body cut-off simultaneously when an anchor hole is formed with a suction cup provided on a second cutting tool and preventing the cover body from falling inside of a panel. CONSTITUTION:A second slit part to connect both ends of a first slit part is formed by using a second cutting tool provided with a flat plate type cutting blade and a suction cup after the semicircular arc first slit part is formed with a first cutting tool provided with a cylindrical cutting blade. Simultaneously, an anchor hole is formed while sucking a cover body cut off by these first and second slit parts with the suction cup.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming anchor holes for fastening anchor bolts for fixing panel panels to foundation structures.

0002

[Prior Art] Panels with facing materials for the interior base are pasted on the surface of a frame assembled into a rectangular outline in advance at a factory, etc., and these are joined on-site to form a frame. In industrialized housing such as so-called prefabricated houses, anchor holes for fastening anchor bolts to secure these panels to the foundation structure on site are pre-installed in the panels. It is necessary to form the

[0003] As a method of forming such an anchor hole, for example, there is a method previously proposed by the present applicant (Japanese Patent Application No. 137646/1999).

[0004] This anchor hole machining method uses a router having an approximately conical cutting blade to cut an approximately isosceles triangular shape with the base facing downward near the base end of the facing material on the surface of the facing panel. This involves cutting the anchor hole.

However, the anchor hole obtained by this method has a small width that can be moved from side to side by introducing a tool such as a ratchet wrench when tightening the anchor bolt. The problem was that bolt fastening work was difficult and workability was poor.

[0006] Therefore, the present applicant proposed the following anchor hole machining method (Japanese Patent Application No. 2-293938).
.

[0007] In this method, a hole saw having a substantially cylindrical cutting blade is applied to the facing panel in an inclined state while cutting is performed, thereby forming a semicircular arc-shaped first notch. , a linear second notch connecting both ends of the first notch is formed using a circular saw having a flat cutting blade.

[0008] According to this method, an anchor hole having a semicircular shape can be obtained, so compared to the aforementioned triangular anchor hole, the left and right width is wider, and it is easier to move a tool such as a ratchet wrench left and right. Anchor bolt fastening work becomes easier.

[0009]

[Problems to be Solved by the Invention] However, in such an anchor hole processing method, there is a problem in that after the desired anchor hole is formed, the cut out face material falls into the inside of the panel from the anchor hole. arise.

[0010] By the way, this cut-out face material will be used as a cover to cover the anchor hole after the anchor bolt fastening work, so it is necessary to take it out from inside the panel and store it in a safe place. .

However, as described above, it is difficult and time-consuming to take out the panel material that has fallen into the interior of the panel from the anchor hole again. This may complicate the work on site and unnecessarily extend the construction period.

[0012]Furthermore, as the facing material falls into the interior of the panel, damage such as cracking or chipping of the facing material often occurs. If the face material is damaged in this way, a new lid must be prepared or the damaged part must be repaired, which increases the work effort and costs. This will cause inconvenience.

The present invention has been made in view of the above circumstances, and provides an anchor hole machining method that can prevent the face material from falling into the inside of the panel after cutting, thereby simplifying on-site work. The purpose is to provide a method.

[0014]

[Means for Solving the Problems] The present invention provides a first cutting tool having a substantially cylindrical cutting blade near the proximal end of the face material on the surface of the face material pasted panel. Cutting is performed while applying the blade to the inclined state, thereby forming a semicircular arc-shaped first notch, and then attaching it to a flat cutting blade with the suction port facing the cutting direction of the cutting blade. A second cutting tool having a suction cup is applied to the linear portion connecting both ends of the first notch with its cutting blade, and the suction port of the suction cup is connected to the linear portion and the first notch. The solution was to perform cutting while pressing against the face material in the area surrounded by the first notch, thereby forming a linear second notch.

[0015]

[Operation] According to the anchor hole processing method of the present invention, the first
After forming the first notch with the cutting tool, cutting is performed using a second cutting tool while pressing the suction port of the sucker against the face material to form the second notch. Therefore, at the same time as the second cutting tool is removed, the portion of the face material surrounded by the first and second cut portions is sucked and lifted by the suction cup. Therefore, the cut-out face material is prevented from falling into the panel through the anchor hole.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the anchor hole machining method of the present invention will be described in detail below in the order of steps with reference to FIGS. 1 to 6.

Reference numeral 1 in FIG.
It is simply called a panel. ). This panel 1 has face materials 1b, 1b such as gypsum board attached to both sides of a frame formed into a rectangular outline by core materials 1a, 1a, . . . .

An anchor hole for anchor bolt fastening work is provided at a predetermined position near the base end of the face material 1b on the surface of the panel 1, that is, at a position close to the position where the tip of the anchor bolt, which will be described later, will be inserted in a later process. form 2.

When forming the anchor hole 2, first refer to FIG.
A hole saw (first cutting tool) 3 as shown in FIG. This first cutting tool 3 has a substantially cylindrical cutting blade 3a, and the cutting blade 3a is rotated by the drive of a motor (not shown). In addition, the cutting blade 3a
A fixing shaft rod 3b, which is the rotation center of the cutting blade 3a and is used to prevent the hole saw 3 from wobbling, is provided protruding from approximately the center of the hole saw.

Then, as shown by the two-dot chain line in FIG. 4, this hole saw 3 is applied to the panel 1 in an inclined state from above to below, and the fixing shaft rod 3b is pierced into the face material 1b. Fix it. In this state, as shown by the solid line in FIG. 4, the motor is driven to cause the cutting blade 3a to rotate, so that a part of the cutting blade 3a penetrates the face material 1b on the surface of the panel 1, and the cutting process is performed. conduct. At this time, the cutting blade 3a is
Be careful not to let the entire part pass through the face material 1b. By doing this, you can prevent the face material 1b from being completely cut out in an oval shape, and create a semicircular arc shape that is curved convexly upward. 1 cut portion 4 is formed. This first cut portion 4 has a tapered cut surface that is cut diagonally downward from the front surface of the face material 1b toward the back surface.

Next, after removing the hole saw 3 from the panel, a second notch 8 is formed using a circular saw (second cutting tool) 5 as shown in FIG. This circular saw 5 includes a circular flat plate-shaped (flat plate-shaped) cutting blade 5a, and the cutting blade 5a.
and a support shaft 5b that is attached to the center of the cutting blade 5a and serves as the rotation center of the cutting blade 5a.The cutting blade 5a is rotated around the support shaft 5b by driving a motor (not shown) It has become. Further, a suction cup 7 is attached to the support shaft 5b of the circular saw 5 via a cushion material 6. The suction cup 7 is approximately dish-shaped and is attached with its suction port 7a facing in the cutting direction of the cutting blade 5a. Further, the cushion material 6 is formed of a soft resin such as polyvinyl chloride into a hollow bellows shape, and is expandable and contractible.

Then, the cutting blade 5a of the circular saw 5 is applied perpendicularly to the panel 1 on the linear portion connecting both ends of the first notch 8, and the suction opening 7 of the suction cup 7 is applied.
A is pressed against the face material 1b in the area surrounded by the linear portion and the first notch 4, and the motor is driven to cause the cutting blade 5a to rotate.
Penetrate b in its thickness direction and press it. by this,
A second linear notch 8 is formed in a linear portion connecting both ends of the first notch 4, and at the same time, an anchor hole 2 having a semicircular outer shape is cut out.

After forming the anchor hole 2 as described above, the rotation of the circular saw 5 is stopped and the panel 1 is removed from the face material 1b. At this time, the face material 9 cut out by the first and second cutouts 4 and 8 is sucked by the suction cup 7 of the circular saw 5 and lifted together with the circular saw 5. In this way, the cushion material 6 expands and contracts in accordance with the weight of the surface material 9 sucked to the suction cup 7 and movements such as shaking, so while absorbing the movement of the surface material 9, it is easy to This face material 9 is taken out from the panel 1 through the anchor hole 2.

Next, a method of fastening an anchor bolt using the anchor hole 2 thus formed and then closing the anchor 2 will be described.

The panel 1 with anchor holes 2 formed according to the method described above is transported to the site and placed on top of the concrete structure 10 formed on site. Code 1 in Figure 1
0 is a foundation structure, and the tips of anchor bolts 11 protrude from the upper end surface of the foundation structure 10 at predetermined intervals. Then, the panel 1 is placed at a predetermined position while inserting the tip of the anchor bolt 11 into the panel 1 from the lower end surface of the panel 1.

Next, a tool such as a ratchet wrench (not shown) is introduced into the anchor hole 2 formed on the surface of the panel 1, and the tip of the anchor bolt 11 protruding inside the panel 1 is removed using the tool. , and tighten nuts 12 to fix the panel 1 to the foundation structure 10.

After this anchor bolt fastening work is completed, the anchor hole 2 is closed. The lid that closes the anchor hole 2 has a
A semicircular arc-shaped face material 9 is used, which is cut out at the same time as the anchor hole 2 is formed and taken out by being sucked by a suction cup 7 of a circular saw 5. Then, this face material 9 is fitted into the anchor hole 2, and the cut surface of the anchor hole 2 and the cut surface of the face material 9 are bonded and fixed to each other with an adhesive or the like.

As described above, according to the anchor hole machining method of this embodiment, after forming the first notch 4 with the hole saw (first cutting tool) 3, a circular saw with a suction cup (
Cutting is performed using the second cutting tool 5 while pressing the suction port 7a of the suction cup 7 against the face material 1b to form the second notch 8. After that, the circular saw 5 At the same time, remove these first and second notches 4.
, 8 is sucked and lifted by the suction cup 7. Therefore, this cut-out face material 9 is prevented from falling into the inside of the panel 1 through the anchor hole 2, so the work of taking out this face material 9 from the inside of the anchor hole 2 as in the past can be omitted, and it can be left as it is. It can be used immediately as a lid to close the anchor hole 2, which is very convenient.

[0029] Also, the cut-out face material 9 is attached to the anchor hole 2.
Since the panel 1 does not fall into the interior of the panel 1, troubles such as cracking or chipping of the panel 9 are prevented. Therefore, it is possible to save the effort of preparing a new lid body or repairing a damaged part, and also to reduce costs.

Furthermore, according to this method, the obtained anchor hole 2 has a semicircular shape as described above, so that its width on the left and right sides is wider than that of the conventional triangular anchor hole. Therefore, when tightening the anchor bolt 11 by introducing a tool such as a ratchet wrench into the anchor hole 2, the tool must be moved freely between the wide left and right widths of the anchor hole 2. As a result, work efficiency is improved and work can be performed reliably with high precision.

Furthermore, according to this anchor hole machining method, the hole saw (first cutting tool) 3 and the circular saw (second cutting tool) 5 are applied to predetermined positions of the panel 1 in order. Since the cutting process is performed using a machine, the operation is extremely simple and has the advantage that anyone can easily carry out the process.

[0032] The anchor hole processing method of the present invention is as follows:
The present invention is not limited to the above-mentioned embodiments, and the specific structural requirements such as the shape, size, and material of each member can be changed as appropriate for implementation.

For example, in the embodiment described above, the hole saw 3 was used as the first cutting tool, and the circular saw 5 was used as the second cutting tool, but each of them had a semicircular arc-shaped cut portion as described above, In fact, other materials may be used as long as they can form a linear cut portion.

Further, in the above embodiment, an example was shown in which the circular saw (second cutting tool) 5 was equipped with a suction cup 7 and a cushion material 6, but in some cases, the cushion material 6 can also be omitted.

[0035]

As explained above, according to the anchor hole processing method of the present invention, after forming the first notch with the first cutting tool, the second cutting tool is used to cut the suction cup. Cutting is performed while pressing the suction port against the face material,
Since the second notch is formed, the second cutting tool is then removed, and at the same time, the face material cut by the first and second notches is sucked and lifted by the suction cup. . Therefore, this cut-out face material is prevented from falling into the panel through the anchor hole. Additionally, damage such as cracking or chipping of the face material does not occur. Therefore, the taken-out face material can be used as a cover body to close the anchor hole immediately, and it is possible to simplify and save labor in on-site construction, and to reduce costs.

Furthermore, since the obtained anchor hole has a semicircular shape as described above, it has a wider left and right width than a conventional triangular anchor hole. Therefore, when a tool such as a ratchet wrench is introduced into the anchor hole to fasten the anchor bolt, there is a large working space and the work efficiency is good.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an anchor hole formed according to the anchor hole processing method of the present invention.

FIG. 2 is a perspective view showing a first cutting tool used in an embodiment of the present invention.

FIG. 3 is a perspective view showing a second cutting tool used in the embodiment of the present invention.

FIG. 4 is a side sectional view illustrating how to use the first cutting tool.

FIG. 5 is a side sectional view illustrating how to use the second cutting tool.

FIG. 6 is a side sectional view showing the state when the second cutting tool is removed.

[Explanation of symbols]

1 Panel (panel pasted with face material) 1b　Facing material 2 Anchor hole 3 Hole saw (first cutting tool) 3a Cutting blade 4 First notch 5 Circular saw (second cutting tool) 5a Cutting blade 7 Suction cup 7a Suction port 8 Second notch 10 Basic construction 11 Anchor bolt

Claims (1)

[Claims] Claim 1: When forming an anchor hole for fastening an anchor bolt for fixing a facing panel to a foundation structure, a substantially cylindrical hole is formed near the base end of the facing on the surface of the facing panel. a first cutting tool having a cutting blade of;
Cutting is performed while tilting the facing panel, thereby forming a semicircular arc-shaped first notch, and then cutting with a flat cutting blade in the cutting direction of the cutting blade. A second cutting tool having a suction cup attached with the suction port facing is applied with its cutting blade to the linear portion connecting both ends of the first notch, and the suction port of the suction cup is pressed. Cutting is performed while pressing the anchor against a face material in a portion surrounded by the linear portion and the first cut portion, thereby forming a linear second cut portion. How to process holes.