JPH0435805A - Working assisting device for portable type motor-driven drill - Google Patents

Abstract

PURPOSE:To obtain a working assisting device for carrying out boring work independently of the material and shape of a work by installing a driving member which extends and contracts in the axis line direction of a drill and forming a structure in which the opposed plates are connected at the top edge of the drill, with the driving member. CONSTITUTION:A working assisting device 10 is constituted of a frame 12 which is installed through a bolt 11 on a motor-driven drill 1, air cylinder 13 fixed on the frame 12, and a pressing plate 16 which is installed on an arm 15 which is formed integrally with the piston rod 14 of the air cylinder 13 so as to be set oppositely to the top edge of the drill 4 installed on a chuck 5. Since it is enough for an operator to hold a handle 3, by carrying out feeding working by the air cylinder 13, boring can be carried out surely without oscillating the drill.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a method for drilling holes using a portable electric drill.
This relates to an auxiliary loader that mechanically applies feeding force to the workpiece to assist machining.

[Conventional technology and its problems]

Portable electric drills are designed so that the operator holds the handle attached to the electric drill with his/her hand and applies feeding force to the electric drill to drill holes, but when drilling a large number of holes or drilling holes in ceilings. When machining is carried out in a converging posture, such as when drilling a hole in a machine, etc., there is a problem in that manual feeding work is accompanied by significant fatigue.

Also, when drilling difficult-to-cut materials such as stainless steel,
Manual pushing force does not provide sufficient feed force, which may cause the drill to shake significantly during machining, or may not be able to form the desired hole shape.

In order to deal with such problems, conventionally, as shown in FIG. , there is one in which the electric drill 42 is moved up and down to apply feeding force. With this structure, the electric drill 42 can be securely fixed to the workpiece A, so that hole drilling can be performed without the drill swinging.

However, with the above structure, the weight of the stand 41 increases, making it inconvenient to use as a portable device.Also, since the stand 41 needs to be fixed with a magnet,
It cannot be installed on non-magnetic materials such as stainless steel or aluminum, and has the disadvantage that the workpieces that can be drilled are limited. Furthermore, the work A has at least a stand 41.
Established! It also has the disadvantage that narrow workpieces cannot be processed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a machining assist device that can be easily attached to a portable electric drill and that can drill holes regardless of the material or shape of the workpiece.

[Means for Solving the Problems] In order to solve the above problems, the processing auxiliary device of the present invention includes a portable electric drill with a drive member that expands and contracts in the axial direction of the drill attached to the electric drill, This driving member has a structure in which a pressing plate facing the tip of the drill is connected.

In addition, in the above structure, the operation of the drive member can be configured to be linked to the operation switch of the portable electric drill.

[Effect]

In the above structure, a workpiece is sandwiched between the pressing plate and the tip of the drill, and the driving member is operated to move the pressing plate toward the drill, thereby applying a feeding force to the workpiece between the pressing plate and the drill. In addition, drill holes in the workpiece.

Cylinders such as air cylinders and hydraulic cylinders, mechanical expansion and contraction mechanisms, and the like can be used as the above-mentioned driving member.

Embodiments] Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

As shown in FIGS. 1 and 2, the portable electric drill 1 consists of a rotary drive unit 2 and a handle 3, and a chuck 5 that removably holds a drill 4 is attached to the tip of the rotary drive unit 2. It is being

The handle 3 is provided with a push-button switch 6 for stopping the rotation drive unit 2, and a power cord 7 extending from the handle 3 is connected to an outlet member S installed on a control board 8. .

As shown in FIGS. 1 to 3, the processing auxiliary device 10 of the embodiment includes a frame 12 attached to an electric drill 1 via bolts 11, an air cylinder 13 fixed to the frame 12, and an air cylinder 13 fixed to the frame 12. Piston rod 1 of cylinder 13
4, and a press plate 16 attached to face the tip of the drill 4 attached to the chuck 5.

The pressing plate 16 is movably attached to the tip of the arm 15 by screwing, and can be freely adjusted according to the thickness of the workpiece interposed between the pressing plate 16 and the tip of the drill 4. It has become.

The air cylinder 13 is attached to the frame 12 so that the moving direction of the piston rod 14 is parallel to the axis of the drill 4 attached to the chuck 5, and the air hose 17 extending from the air cylinder 13 is attached to the control plate 8. It is connected to an electromagnetic on-off valve 18 provided at.

A pressure regulating valve 20 equipped with a meter 1S is connected to the electromagnetic on-off valve ]8, and an air conduit 26 connected to the pressure regulating valve 20 supplies compressed air 'a(
(as shown).

Further, a cord 23 connected to the tfIX cord 22 is connected to the electromagnetic on-off valve 18, and is further connected to the electromagnetic on-off valve 18 via a cord 24 connected to the spin-chiro of the electric drill 1 or a changeover switch 25. .

The above code 24 means that the switch 6 of the electric drill 1 is ON.
, when turned OFF, the signal is sent to the electromagnetic on-off valve 18. When the electromagnetic on-off valve 18 receives this signal, it opens and closes in accordance with the signal to switch the supply path of compressed air to the air cylinder 13. It has become. This switching is
When the switch 6 is ON, the piston rod 14 of the air cylinder 13 moves back to bring the press plate 16 closer to the drill 4. When the switch 6 is OFF, the piston rod 14 moves forward and the press plate 16 approaches the drill 4. is set so as to separate it from the drill 4. The operation of the electromagnetic on-off valve 18 described above is as follows:
By switching the selector switch 25, the operation can be performed independently regardless of the operation of the switch 6.

This embodiment has the above-mentioned structure, and when drilling holes, the drill 4 attached to the chuck 5 and the pressing plate 16 are used.
Sandwich the workpiece A between them and turn on the switch 6 of the electric drill 1.

As a result, the electric drill 1 is operated and the drill 4 is rotationally driven, the electromagnetic on-off valve 18 is operated, the air cylinder 13 is contracted, and the press plate 16 is moved toward the trill 4. Therefore, between the press plate 16 and the drill 4, the work A
A feeding force is applied to the workpiece A, and a hole is drilled in the workpiece A by the drill 4.

When drilling is completed and the switch 6 is turned off, the rotation of the drill 4 is stopped, the electromagnetic on-off valve 18 is switched, the air cylinder 13 is extended, and the press plate 16 is separated from the drill. For this reason, the workpiece A after processing is placed between the drill 4 and the press plate 1.
It can be easily taken out from between 6 and can be continued for the next processing.

In the above case, if the diameter of the drill 4, the material and hardness of the workpiece A change, and the pushing force required for machining changes,
The air pressure is set by adjusting the pressure regulating valve 20 to obtain the required pushing force.

In the electric drill 1 of #1g4 as described above, feeding for machining is performed by the air cylinder 13, and the operator only needs to hold the handle 3, so the operator can swing the drill and drill the hole reliably. be able to.

Furthermore, since the machining aid device 10 can be attached using only the bolts 11, it can be easily attached to a commercially available portable electric drill.

FIG. 4 shows another embodiment. In this example, a gear 28 is engaged with the drill drive gear 27 of the electric drill 1', and the press plate 1 is attached to the screw shaft 29 attached to the gear 28.
An arm 30 to which 6 is connected is screwably attached. In the above structure, when the operation switch 6 of the electric drill 1' is turned on and the drill drive gear 27 is rotated, the gear 28 and the screw shaft 29 are rotated, the arm 30 moves forward and backward, and the press plate 16 move towards.

On the other hand, in the example shown in FIG. 5, the gear 31 of the driving member is engaged with the pawl on the outer periphery of the chuck 5, and the gear 31 and screw shaft 32 are rotated by the rotation of the chuck 5.
6 is moved.

Note that, in addition to the structure of the above-described embodiment, a hydraulic cylinder, a spring mechanism, or the like may be used as the drive member that applies a feeding force to the pressing plate.

〔Effect of the invention〕

As explained above, the machining auxiliary device of the present invention mechanically applies a feeding force to the drill using an extensible drive member, so it can reliably drill holes in a short time without causing the drill to run out. can be done.

In addition, since it is only necessary to hold the workpiece between the press plate and the drill, hole drilling can be performed regardless of the material or shape of the workpiece, such as a narrow workpiece or a workpiece made of non-magnetic material.

Furthermore, since it can be easily attached to an electric drill, there is an advantage that it can be used in commercially available portable electric drills.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a perspective view of the main parts of the same, FIG. 3 is a cross-sectional view of the same processing auxiliary device, and FIGS. 4 and 5 are different from each other. FIG. 6 is a partially longitudinal front view showing an embodiment of the present invention, and FIG. 6 is a front view showing a conventional example. 1.1'...Electric drill, 4...Drill, 5...Cha, Ri, 6...Switch, 10...Processing aid bag! , 12...
... Frame, 13... Air cylinder,
14...Piston rod, 16...Press plate, 18...Solenoid on-off valve, 20...
·pressure! A section valve, 21...Switching valve, 2
5... Changeover switch, 28.31...
Gear, 2S, 32... Screw shaft, 30.33
····arm. Patent applicant Okuno! Agent Fumi Kamata Figure 2 Figure 3

Claims (2)

[Claims] (1) Processing assistance for a portable electric drill in which a drive member that expands and contracts in the axial direction of the drill attached to the electric drill is attached, and a press plate facing the tip of the drill is connected to this drive member. Device. (2) The processing assistance device for a portable electric drill according to claim (1), wherein the operation of the drive member is linked to an operation switch of the portable electric drill.