JP2001259916A - Portable bead cutter tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate work by arranging a cutter shaft of a bead cutting off cutter orthogonal to a handle portion of a tool and enabling a worker to shave bead by putting the handle portion directly above the bead in parallel therewith and straight move the tool, and to enable to cut the bead by a fixes shaving amount by moving the cutter while guiding it with a guide shoe, to shave bead with extremely high accuracy. SOLUTION: This portable bead cutter tool comprises a motor housing, a cutter shaft provided on one side of the motor housing, and a handle portion provided on the opposite side to the cutter shaft across the motor housing. The cutter shaft is arranged to be orthogonal to the handle portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable bead cutter tool (welder bead shaving machine).

[0002]

2. Description of the Related Art Conventionally, welding beads have been shaved off by a grinder. In addition, at the tip of the pneumatic tool, it is provided coaxially with the output shaft of the pneumatic tool, and is shaved off by a grinder rotating in the same direction as the output shaft. Therefore, it was necessary to work with the tool axis of the grinder perpendicular to the bead.
For this reason, the operator holds the handle portion of the tool at a position away from the bead, and scrapes the tool while moving the tool in the bead direction.

For this reason, the amount of shaving, that is, the height of the bead after processing is not constant, and efforts have been made to cut the bead to an even height, but the accuracy is not favorable. In particular, there is "excessive shaving to a minus level" or "sharpening of parts other than necessary places", which has caused problems such as redoing work. As described above, the machining accuracy is not good, and the handle portion of the tool is separated from the bead during the work, so that there is a problem that the work is very difficult.

[0004]

In view of the problems of the prior art, a cutter shaft of a bead shaving cutter is disposed orthogonal to a handle portion of a tool, and an operator places the handle portion directly above a welding bead. By placing the tool in parallel and making it possible to cut the tool by moving it straight on the bead to facilitate the work, and by moving the cutter while guiding the guide shoe with the guide shoe, It is an object of the present invention to provide a portable bead cutter capable of cutting a bead by an amount and enabling highly accurate bead shaving work.

[0005]

Means for Solving the Problems (1) A portable bead having a motor housing, a cutter shaft provided on one side of the motor housing, and a handle portion provided on the opposite side of the motor shaft with respect to the cutter shaft. A cutter tool, wherein the cutter shaft is disposed orthogonal to the handle portion. (2) The cutter fixed to the cutter shaft has adjust shoes on both sides in the cutting direction that can be adjusted vertically. (3) A holding rod is provided above the motor housing sandwiched between the cutter and the handle portion, and a lower support is provided at a lower portion of the motor housing opposite to the holding rod. (4) The motor that drives the cutter shaft is an air motor or an electric motor.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The overall structure will be described first with reference to FIGS. In the present invention, either a pneumatic motor or an electric motor can be used for the driving motor. However, in the following description, an air motor will be described as an example. Reference numeral 1 denotes a motor housing made of an aluminum alloy or the like. Reference numeral 2 denotes a handle portion provided at a rear portion of the motor housing 1 (integrally provided in the example in the figure), and a passage 4 for compressed air is provided in the handle portion 2 as described later. Connected to a hose not shown. 5 is a trigger, this trigger 5
Is pressed downward (in the direction of the arrow X in FIG. 1) against the spring 7, the valve 6 opens and the compressed air enters the air motor 8 in the motor housing 1 to drive it.

The rotation generated by the air motor 8 is
It is transmitted from a motor output shaft 9 (FIG. 2) to a cutter shaft 11 parallel to the motor output shaft 9 via a timing belt 10 parallel to the handle portion 2, and gives rotation to a cutter 12 fixed to the cutter shaft 11. 2, the cutter 12 is located on the opposite side of the handle portion 2 of the motor housing 1 and is orthogonal to the handle portion 2.

At the upper part of the motor housing 1, a holding rod 13 orthogonal to the handle part 2 is mounted just above the air motor (8). 14 is the motor housing 1
It is a cutter housing attached to one side of the cutter housing. The timing belt 1 attached to the cutter housing 14 so as to extend between the motor output shaft 9 and the cutter shaft 11.
0 is attached. Outside the cutter housing 14, a metal or synthetic resin belt cover 15 (FIG. 2)
Are removably mounted with mounting screws 16. The mounting screw 16 is screwed to a boss 17 provided on the cutter housing 14.

The details of the motor housing 1 will be described with reference to FIG. The motor housing 1 has a cylindrical space 28 in which the air motor 8 is incorporated at the center.
The axis of the cylindrical space 28 is orthogonal to the handle 2 of the motor housing 1. A supply passage 4 for compressed air is provided at the center of the handle portion 2, this passage 4 communicates with a valve chamber 29 of the valve 6 through a hole 29 a, and further a passage 30 formed in the motor housing 1 through a passage 30 for the air motor 8. Is communicated with the cylindrical space 28. An exhaust port 31 from the air motor 8 communicates with an exhaust passage 32 provided below the supply passage 4 of the handle portion 2 and is discharged from the end of the handle portion 2 to the outside. One end of the cylindrical space 28 of the motor housing 1 is closed by a cover 1a. The cover 1a has a screw portion 33
It is screwed into and closed. 34 is a trigger 5 (FIG. 1)
Is a pin for connecting the pins.

FIG. 4 shows a rotor 34 which rotates in a cylinder mounted in the cylindrical space 28. In FIG. 4, the rotor 34 is provided with a plurality of grooves 35 (five oblique grooves 35 are provided in the figure), into which compressed air enters to apply a rotational force to the rotor 34. Is to be granted.

The cutter 12 (FIG. 5) is, for example, a milling cutter 3 provided at an angle to the cutter shaft 11 (FIG. 6).
6 are provided on the circumference, and the welding bead is scraped off by this rotation. A cutter cover 18 for preventing scattering of chips generated during shaving of a weld bead.
Is provided. This cutter cover 18 has screws 19
To the cutter housing 14. The cutter cover 18 covers the upper half of the cutter 12. The cutter 12 is fixed by screwing a flat head screw 20 from the end of the cutter shaft 11 into a female screw 20 a (FIG. 6) provided at the end of the cutter shaft 11. The cutter is not limited to a cutter provided with a milling-shaped cutting blade, but may be a file-shaped cutter or a similar cutter, and is not particularly limited.

The adjusting shoe 21 is, as shown in FIG.
It has a U-shape in plan view, and the lower surfaces of both sides 21a and 21b of the U-shape are in a sled shape, and this portion is located slightly below the lower surface of the cutter 12, and the amount of shaving is controlled by the amount of downward movement. The adjusting shoe 21 is provided with a mounting piece 23 at a center position of a base 22 thereof, and
It is attached to an attachment portion 14a protruding sideward from the cutter 12 so that the distance from the cutter 12 can be adjusted by an adjustment screw 24. Reference numeral 21c denotes a vertically long hole provided in the adjusting shoe 21. The adjusting screw 24 extends along the long hole 21c.
The shaft 24a is moved up and down to adjust the vertical position of the screw 24c (FIG. 1). Reference numeral 27 denotes a spring which elastically attaches the adjusting shoe 21 to the cutter housing 14, whereby the adjusting shoe 2
1 can be easily adjusted.

Reference numeral 25 denotes a lower support piece mounted at a lower position of the cutter housing 14 so as to face the holding rod 13, and the adjusting shoe 2 is used while the bead is being cut by the cutter 12.
1 and the lower support piece 25 come into contact with the work surface and are sent forward. The lower support piece 25 has a screw 26 at its base, so that the amount of downward projection can be adjusted.

(Operation) The above-mentioned structure is connected to a high-pressure air source via a hose, and when the trigger 5 is pressed, the valve 6 is pushed down and the air passage is opened. Then, the air motor 8 rotates. The rotation of the air motor 8 is controlled by the output shaft 9
→ Timing belt 10 → Cutter shaft 11 (If the motor is electric, start by pressing a switch instead of trigger 5.)

The cutter shaft 11 is orthogonal to the timing belt 10. That is, since the cutter is parallel to the output shaft 9, the cutter (milling cutter in the figure) 12 fixed to the cutter shaft 11 rotates in the direction of arrow a in FIG.

At this time, since the cutter 12 is covered with the cutter cover 18, the shaved chips are not scattered upward, which is safe for the operator. Further, the increase or decrease of the amount of the bead to be removed can be appropriately adjusted as needed by adjusting the adjusting shoe 21 up and down by the adjusting screw 24.

Thus, the operator holds the handle portion 2 and the holding rod 13 and presses the holding rod 13 downward, thereby causing the adjusting shoe 21 and the lower support piece 25 to come into contact with the work and move forward (see FIG. 1). When the tool is sent to the left side, the adjusting shoe 21 and the lower support piece 25 are always in contact with the work surface, and the welding bead can be precisely cut off. In other words, the shaving can be performed without excessive shaving or shaving of places other than necessary.

[0018]

(1) According to the first aspect of the present invention, the rotation axis of the cutter for shaving off is made parallel to the output shaft of the motor so that the cutter can be rotated in the traveling direction of the tool. By moving the cutter along, the bead can be precisely cut off, and the operation is easy and extremely safe. (2) According to the second aspect, the cutter can be moved while sliding the adjusting shoe and the lower support piece having a constant height on the work, so that the bead shaving operation can be performed with extremely high precision. (3) According to claim 3, when the holding rod 13 is pressed downward,
The lower support 25 and the adjusting shoe 21 opposed thereto
Abuts against the work surface, so that a given amount of shaving can be accurately performed only by giving forward feed.

[Brief description of the drawings]

FIG. 1 is a side view in partial longitudinal section of an air motor type cutter tool which is an example of a portable bead cutter according to the present invention.

FIG. 2 is a plan view showing a partial cross section of the bead cutter.

FIG. 3 shows a motor housing, (a) is a plan view,
(B) is an AA sectional view of (a), and (c) is a B- view of (b).
B sectional drawing.

FIG. 4 shows a rotor, (a) is a side view of the rotor,
(B) is an AA sectional view of (a).

5A and 5B show a cutter, wherein FIG. 5A is a side view, and FIG.

6A and 6B show a cutter shaft, FIG. 6A is an overall side view showing a partial cross section, and FIG.

7A and 7B show details of the cutter housing, wherein FIG. 7A is a plan view and FIG. 7B is a rear view of FIG.

FIG. 8 shows an adjustment shoe.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Motor housing 2 Handle part 3 Inlet 4 Passage 5 Trigger 6 Valve 7 Spring 8 Air motor 9 Motor output shaft 10 Timing belt 11 Cutter shaft 12 Cutter 13 Holding rod 14 Cutter housing 14a (of cutter housing) Mounting part 15 Belt cover 16 Mounting screw 17 Boss 18 Cover 19 Screw 20 Flat head screw 21 Adjusting shoe 21a, 21b Both sides (of adjusting shoe) 21 Slotted hole (of adjusting shoe) 22 Base 23 Mounting piece 24 Adjusting screw 24a Adjusting screw shaft 24c Screw 25 Lower part Support piece 26 Screw 27 Spring 28 Cylindrical space 29 Valve chamber (of valve 6) 30 (For air inflow)
Passage 31 Exhaust port 32 Exhaust passage 33 Screw part (for screwing in cover) 34 Rotor 35 Groove 36 Milling cutter

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Mine Yasushi Taniguchi 100th Hyakunincho, Higashi-ku, Nagoya-shi, Aichi F-term in the office mine (reference) 3C022 DD11 DD17

Claims (4)

[Claims] 1. A portable bead cutter tool comprising a motor housing, a cutter shaft provided on one side of the motor housing, and a handle provided on the opposite side of the cutter shaft with the motor housing interposed therebetween. A portable bead cutter tool, wherein a cutter shaft is disposed orthogonal to the handle portion. 2. The portable bead cutter tool according to claim 1, wherein the cutter fixed to the cutter shaft has an adjustable shoe on both sides in the cutting direction, the adjustable shoe being adjustable in vertical position with respect to the cutter. . 3. A motor according to claim 1, further comprising a holding rod above the motor housing sandwiched between the cutter and the handle, and a lower support provided at a lower portion of the motor housing opposite to the holding rod. Item 4. A portable bead cutter tool according to Item 1. 4. The portable bead cutter tool according to claim 1, wherein the motor for driving the cutter shaft is an air motor or an electric motor.