JPS5810415A - Boring tool - Google Patents

Abstract

PURPOSE:To perform the boring of coaxial and different diameter holes sequentially and efficiently by means of single boring tool through the members to be bored while separated each other such as the ceiling board and the ceiving back plate. CONSTITUTION:The boring tool is comprised of second boring tool 3 fixed dismountably at the tip of a drive shaft 1 and the first boring tool 2 fixed to the shaft 1. The shaft 1 is coupled to the drive shaft such as an electric drill. A lead hole is made through the member to be bored by means of a boring drill 3F then a spot facing hole is made by means of a circular saw edge 3E. Thereafter it is worked by a spot facing edge 3D. Then the second boring tool 3 is removed to guide a non-rotatably tubular member 4 through the spot facing hole thereafter the ceiling back plate is bored by means of a circular saw 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drilling tool, and more particularly to a drilling tool capable of drilling concentric holes of different diameters in mutually spaced objects in a fusion manner.

In the case of air conditioning equipment such as Pill, air conditioning equipment installed on the basement floor of Pill is supplied to the tacts on each floor, and the air taken into the air #1 storage is filtered in advance. It's filtered. However, since conventional filters cannot remove dust and bacteria from the microgeotor, these dust and bacteria pass through the air conditioning equipment and adhere to the inner walls of the air conditioning tact on each floor of the pill, where they are exposed to bacteria and bacteria. Microorganisms, microscopic insects, etc. will proliferate.

As a result, these microorganisms, molds, microscopic insects, etc. are blown into the room, creating a situation that is concerning for the health of people indoors.

Therefore, in order to improve this situation, it is necessary to disinfect and disinfect the inside of the air conditioning tact chamber from time to time.
The cross-sectional area of the air-conditioning tact is not large enough for people to enter, and the air-conditioning tact is installed in the ceiling, making it difficult to access. I couldn't do it.

However, recently, an in-tact chemical sprayer has been developed that can be attached to the outside wall of the tactile chamber and spray disinfectant or sterilizer into the tactile area, so it has become possible to disinfect and sterilize the tactile area from outside the tactile area, improving the above-mentioned situation. However, when installing this in-tact chemical sprayer to the air conditioning tact in the attic, it is necessary to remove the ceiling panel, climb a ladder, and enter the attic using a drill, hacksaw, etc. Since it is necessary to use equipment to drill a fairly large hole in the tact,
The problem is that the preparation work for installing IM and other equipment takes a lot of time, and therefore the cost of installation becomes very high.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a drilling tool that can drill concentric holes from one direction in two spaced objects to be drilled. More specifically, it is an object of the present invention to provide a drilling tool capable of drilling concentric holes in a ceiling board and a tact in the attic from inside a room.

Embodiments of the present invention will be described below with reference to the drawings.

In Figure 1, 1 is a drilling machine such as an electric drill (not shown)
The drive shaft 1 is rotatable and movable in the axial direction, and a cylindrical first drilling tool 2 is formed integrally with the tip of the drive shaft 1. There is. As shown in FIG. 2, the first borehole A2 is equipped with an annular saw blade 2a on its tip surface, and has a mounting hole 2b such as a square fitting hole or a conical tapered hole at its center bottom. ing. A mounting shaft portion 3A of a second punching tool 3, which will be described later, is removably fitted into the mounting hole 2b.

A cylindrical body 4 is disposed surrounding the drive shaft 1 and the first punching tool 2. This cylinder 4 has a front end 4A and a rear end 4B.
The front end portion 4A and the rear end portion 4B are integrally connected and are relatively slidable in the axial direction with respect to the drive shaft 1, but are configured as non-rotating members. Tip part 4 of cylinder body 4
An annular saw blade 4a is formed on the tip end surface of A. As will be explained later, this annular saw blade 4a is used to pierce a heat insulating coating layer covered with a wire mesh or the like on the outside of the tact, penetrate deeply into the coating layer, and perform the perforation without any trouble.

The second punching tool 3, which is fitted into the mounting hole 2b of the first punching tool 2, is a tool member for making a counterbore hole in the ceiling board of the Starboard Gin, as will be explained later. Mounting shafts 3A arranged sequentially from the rear end side to the tip side
, grip part 3B, collar part 30, countersink blade 3D, annular saw blade 3
E, drilling drill 3F, etc.

The collar portion 3C is a part that becomes a stopper when a counterbore hole 6 is bored in the ceiling plate 5 (FIG. 4), and has a diameter larger than the maximum diameter of the counterbore hole.

As shown in FIG. 3, the counterbore blade 3D protruding from the front end surface of the collar portion 3C has a serrated blade 3a on its front end surface, and the outer diameter of the nine layered blades 3D is is smaller than the outer diameter of the portion 3C, and its axial length t is equal to the counterbore depth of the counterbore hole to be drilled.

An annular saw blade 3E having a smaller diameter than the diameter of the counter boring blade 3D and a larger diameter than the outer diameter of the first punching tool 2 projects from the front end surface of the counter boring blade 3D. As shown in Fig. 8 and 3, a large number of sharp saw blades 3b are formed on the distal end surface of 3E. The annular blade 3E is a part for making a counterbore hole in the ceiling board, as will be explained later, and its length in the axial direction is at least larger than the thickness of the ceiling board.

Also, the drilling drill 3F placed at the center of the annular saw blade 3E is a normal drill, and this drilling drill 3F costs $30.
It is designed to be fitted into a mounting hole such as a square hole provided in the center of the board. The role of this drilling drill 3F is to drill R into the ceiling board.
Make the first hole to ensure center positioning Next, use the drill hole of the above configuration to drill a hole in the ceiling board and the air conditioning tact in the attic from inside the room. Explain the operation.

First, the four-hole tool of the present invention assembled as shown in Fig. 1 is added to the drilling machine (not shown), and at this time, the rear end 4B of the cylinder 4 is fixed to the stationary part of the drilling machine. together with the drive shaft l
is connected to the drive shaft of the drilling machine. A drilling machine is installed on one side of the ceiling &5 in FIG. 4 (that is, indoor VC) so as to be able to move up and down, and first, a counterbore hole 6 is bored in the ceiling board 5 with the second drilling tool 3. In this case, use the drilling drill 3F to drill a guide hole in the ceiling &5, and then send it to the entire upper part of the tool for drilling.
E to small e1 of seatbore 6! , after penetrating the portion 6a,
Further, the tool is sent upward and the counterbore surface 6b of the counterbore hole 6 is machined by the counterbore blade 3D. At this time, the axial length t of the countersinking blade 3D is equal to the floor of the countersinking surface 6b, and the front end surface of the feeding part 3G to the upper blade of the punching/drilling tool is on the lower surface of the ceiling plate 5. After the blocking hole 6 is drilled in the ceiling board 5, the second punching tool 3 is removed from the tip of the first punching tool 2, and then the hole 8 is drilled in the air conditioning tact 7 in the attic. perforate.

That is, the annular saw blade 4a at the tip of the cylindrical body 4 is inserted through the outermost metal mesh 7A of the air conditioning tact 7 into the inner soft heat insulating material layer 7B, and the metal mesh 7A is pressed inside the saw blade 4a to open the cylinder. After positioning the body 4 so that it does not move, when the first punching tool 2 integrated with it is rotated via the drive shaft l,
The wire mesh 7A, the heat insulating material layer 7B, and the tactile body 7c (made of iron plate) are sequentially perforated by the annular saw blade 2a of the first punching tool 2 to form the holes 8 in the air conditioning tact 7. Normally, drilling holes in the wire mesh part is extremely troublesome work, but according to Teikobi, the drilling process is completed smoothly because it is firmly held down by the outside f114.

After drilling holes in the ceiling board 5 and the air conditioning tact 7 as described above, a fitting pipe member such as a disinfectant sterilizer sprayer (not shown) is attached to the hole 8 of the tact 7, and the green material and the ceiling board are 5
A cover (not shown) that can be opened and closed is attached to the counterbore hole 6,
Prepare for periodic disinfection and sterilization work inside the air conditioning tact 7
As described above, according to the drilling tool of the present invention, it is possible to drill holes in the air conditioning duct in the attic along with the ceiling board from inside the room, so the preparation work for installing the disinfectant and disinfectant sprayer on the air conditioning duct is unnecessary. It can be done easily and quickly, and as a result, 11. It is now possible to mount the mist devices next to each other.The attached drawings show an example of the present invention. It should be noted that the transformation and modification of is Roe's ability.

[Brief explanation of the drawing]

FIG. 1 is an oxidation surface view of one embodiment of a drilling tool according to the present invention, and FIG. 2 is a ++-U enlarged sectional view of FIG. 1.
11 and FIG. 4 are diagrams illustrating a state in which a hole is drilled into a ceiling plate and an attic pipe using the drilling tool of the present invention. 1... Drive shaft 2... First drilling tool 3.
...Second drilling tool 3C...Brim portion 3D...
Counterbore blade 3E...Annular saw blade 3F...Perforation drill 4...Cylinder 5...Ceiling plate
6... Counterbore hole 7... Air conditioning tact 7
A...wire mesh 8...hole

Claims (1)

[Claims] A first drilling tool having an annular saw blade that is fitted in a non-rotating cylindrical body having an annular saw blade at its tip so as to be movable in the axial direction and rotated by a drive shaft of a drilling machine, etc.; a second punching member which is removably connected and protrudes in front of the V-hole; a counterbore blade that protrudes from the front end face of the boxwood part and has a blade on its own front end face and has a smaller diameter than the boxwood part; A spaced-apart ceiling plate and an air conditioner comprising an annular saw blade having a blade on a surface and having a smaller diameter than the countersinking blade, and a drilling drill protruding in front of the annular saw blade and having a smaller diameter than the annular saw blade. A drilling tool characterized in that it is capable of drilling concentric holes in a cutting tool, etc.