JPH07124808A - Portable drilling machine - Google Patents

Abstract

PURPOSE:To obtain an ecconomical portable drilling machine by which a preliminary processing hole can be processed automatically during the process of a real processing hole by only positioning and fixing the preliminary processing hole on the prearranged strong magnetic body. CONSTITUTION:In a portable drilling machine in which a drilling machine main body 2 with a drill 5 is fixed and used by a magnetic force on the surface (y) of a strong magnetic body X, a permanent magnet piston 24 energized in the opposite direction to the strong magnetic body X by a return spring 25 is stored in attraction cylinders 22A, 22B whose end surfaces are attraction surfaces 22a for the strong magnetic body X. A manual shielding valve for connecting the air in the attraction surface side rooms 22b of the attraction cylinders 22A, 22B to the outside selectively is arranged in the drilling machine main body 2 and a manual separation rod for separating the attraction cylinders 22A, 22B atrracted to the strong magnetic body X from the strong magnetic body X forcely is arranged in the drilling machine main body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable punching machine, and more particularly to a portable punching machine which is used by being fixed to the surface of a ferromagnetic material by magnetic force.

[0002]

2. Description of the Related Art As is well known, in a construction site such as a building, since a communication line, a power line, a gas pipe and the like attached to the building are installed, a part of the steel frame has a diameter of about 15 to
It is often required to machine a hole of about 25 mm.

In such a case, conventionally, a steel frame B (which is a ferromagnetic material) is used by using a hand drill A as shown in FIG.
The pipe hole C is processed in a part of the above, but with such a hand drill A, since it becomes a hand-held process, the work of directly processing the hole of the above-mentioned diameter on the steel frame having a thickness of about 10 mm. Will be a lot of hard work. For this reason,
Conventionally, before processing a hole of a desired diameter, a pre-processing hole with a small diameter, which is the center of the hole, is pre-drilled, and a main-processing hole with a large diameter is punched later using the pre-processing hole. I am devising.

[0004]

However, in machining with such a pre-machined hole, since the pre-machined hole serves as a guide hole for the main machined hole, the labor required for machining the main machined hole can be reduced. Since it takes a considerable time to process the pre-processed hole and the pre-processed hole is processed with another hand drill A, another worker for the pre-processed hole is required, We could not expect to streamline the work.

The object of the present invention is to carry out the main machining only by positioning and fixing the pre-machined hole to the expected ferromagnetic material in view of the present situation of the hole machining at the work site by the conventional hand drill as described above. It is to obtain an economical portable drilling machine that can automatically machine pre-machined holes while drilling holes.

[0006]

To achieve this object, the present invention provides a portable perforator having a perforator body having a drill, and the perforator body is magnetically fixed to the surface of a ferromagnetic body. In, the end face is housed inside the adsorption cylinder made to be an adsorption surface for the ferromagnetic material, and the permanent magnet piston biased in the opposite direction to the ferromagnetic material by the return spring is accommodated in the adsorption surface side chamber of the adsorption cylinder. A manually operated shut-off valve that selectively communicates air to the outside is provided in the punch machine body, and a manually operable separation rod that forcibly separates the adsorption cylinder adsorbed by the ferromagnetic material from the ferromagnetic material is punched. It proposes a portable punching machine provided in the machine body.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described in detail below with reference to FIGS. The punching machine main body 2 having a horizontal grip handle 1 fixed to one side is made of a ferromagnetic material X such as a steel frame shown by a virtual line.
It is used by fixing it to the surface y of the punching machine with a magnetic force, and inside the punching machine body 2, a movable table 4 which is fed toward a ferromagnetic material X by a feed screw 3 described later in detail is built in. Four
Is equipped with a spindle 7 having a drill chuck 6 at the tip to which a drill 5 is attached.

That is, as shown in FIG. 2, a feed motor 8 is built inside the punching machine body 2, and a pinion 9 of the feed motor 8 is rotatable by a bearing 11 via an intermediate gear 10. It is meshed with the driven gear 12 of the feed screw 3 supported by the punching machine body 2. Further, as shown in FIG. 3, a fixing sleeve 14 fixed by a fixing key 13 is arranged inside the punching machine body 2.
A screw sleeve 16 supported by a slide key 15 so as to be slidable in the lengthwise direction of the feed screw 3 is disposed inside the screw 4, and the inner surface of the screw sleeve 16 has a screw portion 3 a of the feed screw 3. Are screwed together.

Although the movable base 4 is fixed to the lower end of the screw sleeve 16, a spindle 7 located on the extension of the feed screw 3 is rotatably supported by a bearing 17 at the lower part of the movable base 4. Supported. This spindle 7 is provided with a drill chuck 6 at its lower end, and the drill chuck 6 can hold a small-diameter drill 5 for drilling a pre-processed hole. On the other hand, as shown in FIG. 3, a spindle motor 18 is mounted on the upper part of the movable table 4, and a drive pinion 19 of the spindle motor 18 is fixed to an intermediate portion of the spindle 7 via a reduction gear train 20. Since the spur gear 21 is rotationally driven, the spindle 7 and the drill chuck 6 are rotated at a reduced rotational speed by the driving force of the spindle motor 18.

An end face is attached to the bottom of the punching machine body 2 by a suction surface.
A pair of suction cylinders 22A and 22B, which are denoted as 22a, are fixed, and a permanent magnet piston 24, which is kept airtight by a seal ring 23, is slidably housed inside the suction cylinders 22A and 22B, respectively. That is, the permanent magnet piston 24 is provided between the piston rod 24a of the permanent magnet piston 24 and the end surfaces of the suction cylinders 22A and 22B.
The compression spring 25 for urging the
(Return springs) are respectively interposed and these compression springs 2
The force of 5 urges both permanent magnet pistons 24 in the direction opposite to the attracting surface 22a. Further, as shown in FIG. 6, the suction cylinders 22A,
A manually operable shut-off valve 26 that can control the air in the suction side chamber 22b of 22B is provided. The shutoff valve 26 is connected to the suction surface side chamber 22b of each of the suction cylinders 22A and 22B via a connecting pipe 27. The connecting pipe 27 is always shielded from the outside air, and the manual button of the shutoff valve 26 is connected. Only while 26a is being pressed, the connecting pipe 2 is connected via the shutoff valve 26.
7 is contacted in the open air. The reference numeral "28" on the upper end surface of each of the suction cylinders 22A and 22B in FIG. 2 is an air escape hole.

The above-mentioned grip handle 1 is provided with a separating mechanism capable of forcibly separating the suction cylinders 22A and 22B adsorbed on the surface y of the ferromagnetic material X. That is, the separating mechanism includes a holder 29 fixed to the grip handle 1 and a manual lever 31 supported by a fulcrum shaft 30.
Is connected by a wire 36 to an intermediate node 35 of two pairs of toggle links 33, 34, one end of which is supported by a support shaft 32 on the mounting wall 2a of the punching machine body 2. Further, the support shaft 32 supports the intermediate portion of the biasing spring 37, and the other ends of these biasing springs 37 whose one end is in contact with the vertical portion of the mounting wall 2 a are engaged with the intermediate joint 35. Since they are combined, the intermediate joint 35 is urged clockwise around the support shaft 32 in FIG.

As shown in FIG. 5, the separating mechanism includes a pair of separating rods 39A and 39B whose proximal ends are joined to the floating shafts 38 of the toggle links 33 and 34, respectively. 39B is supported slidably in the vertical direction by a guide sleeve 40 fixed to the mounting wall 2a.
Therefore, when the manual lever 31 is manually operated to the position shown by the solid line in FIG. 4 against the force of the biasing spring 37 described above, both separation rods 39A are connected via the toggle links 33, 34.
, 39B are projected toward the surface y of the ferromagnetic material X, the attraction surface 22a of the attraction cylinders 22A, 22B attracted to the surface y of the ferromagnetic material X by the force of the permanent magnet piston 24 becomes strong. It is forcibly separated from the magnetic substance X.

Since the portable punching machine according to the illustrated embodiment has the structure as described above, it is possible to punch a pre-processed hole or the like in a ferromagnetic material X such as a steel frame at a construction site. In order to position the portable perforator at a predetermined position on the surface y of the ferromagnetic material X, the tip of the drill 5 is standardized to the position for boring a pre-machined hole, and then the manual button of the shield valve 26 of the ferromagnetic material X is used. Press 26a with your fingertips. That is, prior to the operation of the manual button 26a, both permanent magnet pistons 24 are at the highest position due to the force of the compression spring 25, and the suction cylinder
Since the suction surface side chambers 22b of 22A and 22B are isolated from the outside air, even if the suction surface 22a is brought close to the surface y of the steel frame which is the ferromagnetic body X, the punching machine main body 2 sticks to the surface y of the ferromagnetic body X. It will not be done. Therefore, the portable punching machine can be freely moved to the surface y of the ferromagnetic body X for punching the pre-machined hole, and the suction surfaces 22a of the suction cylinders 22A, 22B can be brought into contact with the surface y.

After that, when the manual button 26a of the shutoff valve 26 is operated, the connecting pipe 27 communicates with the outside air through the shutoff valve 26, so that the suction surface side chamber 22b of the suction cylinders 22A, 22B.
Since the air inside is exhausted to the outside air through the connecting pipe 27 and the shutoff valve 26, both permanent magnet pistons 24 are lowered against the force of the compression spring 25 by the magnetic force between the air and the ferromagnetic body X. The punching machine body 2 is strongly fixed to the surface y of the ferromagnetic body X by the attraction force of the permanent magnet piston 24. As a result, when the power of the feed motor 8 and the spindle motor 18 is turned on, the pre-processing hole is automatically drilled by the drill 5, so that the worker may perform the work of drilling the main processing hole with another hand drill. .

In order to remove the portable punching machine from the ferromagnetic material X after the pre-machined hole is machined, the manual lever 31 can be easily removed. That is, by operating the manual lever 31, the toggle link 3 that constitutes a booster mechanism.
Since the tip ends of the separating rods 39A and 39B are brought into contact with the surface y of the ferromagnetic body X with a strong force at 3, 34, the punching machine main body 2 resists the attraction force of the permanent magnet piston 24 and the separating rods 39A and 39B.
, 39B forcefully separates from the surface y of the ferromagnet X. Therefore, when the attracting surface 22a is slightly floated above the surface y of the ferromagnetic body X, the attractive force of the permanent magnet piston 24 to the ferromagnetic body X rapidly weakens, and the manual button 26a of the shutoff valve 26 is operated again. Then, the shutoff valve 26
Outside air is introduced into the suction surface side chambers 22b of the suction cylinders 22A and 22B through the connecting pipe 27, and both permanent magnet pistons 24 are lifted by the force of the compression spring 25. Of course, when the fingertip is released from the manual button 26a of the shutoff valve 26, the insides of the suction surface side chambers 22b of the suction cylinders 22A and 22B are isolated from the outside air again. The machine can be completely separated from the ferromagnet X.

[0016]

As is apparent from the above description, according to the present invention, it is possible to obtain an economical portable perforator which does not require an energy source other than a motor for rotating and driving a drill. That is, the portable perforator of the present invention is such that the shielding valve for controlling the air in the suction surface side chamber of the suction cylinder containing the permanent magnet piston and the suction surface of the suction cylinder are forcibly separated from the surface of the ferromagnetic material. To attach and detach the punching machine body to the surface of the ferromagnetic material by the manual operation separating rod
Compared with a portable punching machine using an electromagnet, it has the effect of being much cheaper and smaller in size.

[Brief description of drawings]

FIG. 1 is a top view of a portable punching machine according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a front view of the portable punching machine.

5 is a sectional view taken along line 5-5 of FIG.

6 is a sectional view taken along line 6-6 of FIG.

FIG. 7 is an explanatory diagram of a conventional punching process using a hand drill.

[Explanation of symbols]

 X Ferromagnetic material y Surface (of ferromagnetic material) 2 Drilling machine body 5 Drill 22A, 22B Adsorption cylinder 22a Adsorption surface 22b Adsorption surface side chamber 24 Permanent magnet piston 25 Compression spring (return spring) 26 Shut-off valve 39A, 39B Separation rod

Claims (1)

[Claims] 1. A portable perforator having a perforator body having a drill, wherein the perforator body is fixed to the surface of a ferromagnetic material by magnetic force, and the end face is an adsorption surface for the ferromagnetic material. A manually operated shut-off valve that accommodates a permanent magnet piston biased in the opposite direction to the ferromagnetic body by a return spring inside the cylinder and selectively communicates the air in the suction surface side chamber of the suction cylinder to the outside A portable punching machine, characterized in that the punching machine main body is provided with a manually operable separating rod which is provided in the punching machine body and forcibly separates the adsorption cylinder adsorbed by the ferromagnetic body from the ferromagnetic body.