JPH11138504A - Drilling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drilling machine by which an equipment hole with excellent accuracy can be safely perforated. SOLUTION: A drilling machine 1 for boring a girder 5 wherein under a condition where it is brought into contact with the girder 5, an opening part 24 for opening this contact face is formed and a base stand 2 provided with a pair of clamp members 20 for pinching the girder 5 from both sides of the contact face, a rack 3 extended from this base stand 2 and a drill main body 4 intermeshing with this rack 3 and elevating and descending to the base stand 2 and perforating the girder 5 from the opening part 24 of the base stand 2 are provided, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling machine for drilling a large-diameter facility hole in a wooden girder.

[0002]

2. Description of the Related Art In general, when a wooden house is constructed, equipment holes are provided in a girder in order to route pipes such as electricity and water.

[0003] Conventionally, when an installation hole is provided on the girder at the site, an operator has directly made a drill.

[0004]

However, when an operator directly drills an equipment hole with a drill as in the above-mentioned conventional technique, the resistance of the drilling blade increases in a hard portion of wood or the like.
Therefore, when attempting to drill a large-diameter equipment hole for piping and the like, the resistance applied to the drilling blade also increases, and this drilling blade bites into the wood and locks,
Instead of the drill bit, the drill bit itself tries to rotate. Therefore, when using a drill, the operator must directly receive the repulsive force applied to the drill, which causes inconvenience such as damaging the wrist.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a drilling machine capable of safely drilling a facility hole with excellent accuracy.

[0006]

A drilling machine according to the present invention for solving the above-mentioned problem is a drilling machine for drilling holes in wood. An opening that opens the surface is formed, and a base provided with a pair of clamp members that sandwich the wood from both sides of the contact surface,
The rack includes a rack extending from the base, and a drill body that meshes with the rack, moves up and down with respect to the base, and drills wood from an opening in the base.

[0007]

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

FIG. 1 schematically shows the entire configuration of a drilling machine 1. That is, the drilling machine 1 includes a base 2 and a rack 3
And a drill body 4, so that the equipment hole 50 can be drilled in the girder 5.

As shown in FIG. 1 (a), the base 2 is formed by welding and fixing an angle member having an L-shaped cross section, and opposing holding portions 21 and 21 and a contact portion connecting them. 22
And a reverse groove shape having side views.

[0010] Of these, the threaded rods 20a of the clamp members 20 are screwed into the holding portions 21, respectively. The clamp member 20 is provided with a holding piece 20b at an end on the opposite side of the screw bar 20a, and a slide shaft 20c orthogonal to the screw bar 20a at an end on the opposite side. And the contact part 2 of the base 2
2 is in contact with the girder 5, the slide shaft 20c
Is rotated so that the threaded rod 20a is screwed, so that the girder 5 can be clamped and fixed between the clamping pieces 20b.

On the other hand, the contact portion 22 is framed in a rectangular shape in a plan view, and is divided into an opening 24 and a rail sliding portion 25 by an angle material serving as a wall 23 for preventing scattering of wood chips. Of these, two rails 25 a are fixed to the rail sliding portion 25 by welding along the width direction of the base 2.

The rack 3 is fixed to a rack base 31. The rack base 31 is provided between the two rails 25a, and is slidable in the width direction of the base 2 along the rails 25a.

The drill body 4 has an arm 42 extending in a direction perpendicular to the drilling jig 41. This arm 42
Are engaged with the rack 3 and move up and down along the rack 3. The length of the arm 42 is set so that the drilling jig 41 of the drill body 4 is located at the center of the opening 24 of the base 2.

Next, the drilling machine 1 constructed as described above.
How to use will be described. First, as shown in FIG. 3A, the contact portion 22 of the base 2 is placed on the girder 5 so as to be in contact therewith, and the drilling jig 41 of the drill body 4 is lowered.
Then, by aligning the drilling jig 41 with the drilling position of the equipment hole 50, the drilling machine 1 is positioned with respect to the girder 5.

In this state, as shown in FIG. 3B, both sides of the girder 5 are clamped by the clamp member 20, and the drilling machine 1 is fixed to the girder 5. At this time, the drilling machine 1 can finely adjust the position of the girder 5 in the width direction by holding and fixing the girder 5 from the width direction while adjusting the fastening condition of the clamp member 20. In addition, in the longitudinal direction of the girder 5, the rack 3 is slid in the width direction of the base 2 along the rail 25a, so that fine position adjustment can be performed.

After the drilling machine 1 is attached to the accurate position of the girder 5 in this manner, FIGS. 3 (c) and 3 (d)
The drill body 4 is lowered along the rack 3 while rotating the drilling jig 41 as shown in FIG. Then, the base 2
The equipment hole 50 will be drilled at a predetermined position of the girder 5 in the opening 24 of the above. At this time, a drilling jig 41 having a large diameter formed to drill a facility hole 50 having a diameter of 120 mm is used. For this reason, there is a concern that the drilling jig 41 has a large resistance at the time of drilling, bites into the girder 5 and stops rotating, and the corresponding repulsive force is applied to the drill body 4. However, since the drill body 4 is configured to mesh with the rack 3, a repulsive force or the like applied to the drill body 4 during drilling is not applied to the operator. Therefore, the operator can drill the large-diameter equipment hole 50 in the large beam 5 by a simple operation such as lowering the drill body 4 along the rack 3. In addition, wood chips at the time of drilling are prevented from scattering by the scattering prevention wall 23.

In this embodiment, the base 2 of the drilling machine 1 is configured to be clamped and fixed from both sides of the girder 5 by a pair of clamp members 20. One side of the girder 5 is clamped. The positioning of the girder 5 in the width direction may be performed in a state in which the girder 5 is in contact with the piece 21, and the girder 5 may be fixed only by fastening the clamp member 20 from the other side.

In the present embodiment, the rack 3 is fixed to the rack base 31 and moves in the width direction of the base 2 along the rail 25a. May be fixed.

Further, in this embodiment, the drilling jig 41 is used.
Is used to drill the equipment hole 50 having a diameter of 120 mm. However, the size of the drilling jig 41 is not particularly limited, and an appropriate Diameter ones can be used. However,
When the drilling diameter is small, the drilling resistance increases,
Repulsive force is less likely to be generated in the drill body 4, and the drilling operation can be easily performed even with a normal hand drill (not shown). Therefore, this drilling machine 1 has a diameter of 50 mm or more, preferably 100 m in diameter.
It is particularly effective when drilling work with a large diameter of not less than m. Further, even in the case of a small diameter, the use of the drilling machine 1 is effective in a case where the girder 5 itself has many nodes or is formed of a laminated material having different hardness.

Further, in the present embodiment, the case where the equipment hole 50 is drilled in the girder 5 is described. However, the present invention can be used for drilling various woods other than the girder 5.

[0021]

As described above, according to the present invention, the drill body is raised and lowered with respect to the base in a state where the base is held and fixed to the wood, and the wood is drilled from the opening of the base. . At this time, the drill body is designed to mesh with the rack extended from the base, so even if the drilling blade of the drill body bites into the wood and locks, the repulsive force applied to the drill body Is not transmitted to the worker. Therefore, the drilling operation can be performed safely.

In addition, since this drilling machine has a compact configuration in which the base is directly held and fixed to the wood, it is used.
It can be carried to the site and used, and it becomes possible to drill an elaborate equipment hole on the site in the same way as drilling an equipment hole with a drilling machine at a factory.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are a front view and a plan view schematically showing the entire configuration of a drilling machine.

FIG. 2 is a perspective view showing a use state of the drilling machine.

3 (a) to 3 (d) are side views each showing a step of drilling a facility hole in a girder by a drilling machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drilling machine 2 Base 20 Clamp member 24 Opening 3 Rack 4 Drill main body 5 Beam (wood) 50 Equipment hole

Claims (1)

[Claims] 1. A drilling machine for drilling wood.
A base provided with a pair of clamp members for holding the wood from both sides of the abutting surface while forming an opening for opening the abutting surface in a state of being abutted against the wood; A drilling machine, comprising: a rack extending from the rack; and a drill body that meshes with the rack, moves up and down with respect to the base, and drills wood from an opening in the base.