JPH11207595A - Hand disk grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To design a hand disk grinder to be suitably used for finishing of a ceiling, wall and floor in a construction site and to be handled easily by a worker who is on a trestle and assumes no unnatural postures so that the grinding surface is pressed on a surface to be ground at a constant pressure. SOLUTION: A telescopic handle 2' is mounted on its tip with a bracket 4 with a pin 5, to which a hand disk grinder(HDG) 7 is journalled for swing motion by 90 degrees as regards its grinding surface 6. The handle 2' is provided at its grip with a switch adapted to switch the HDG 7 on only while the handle 2' is held. Between the bracket 4 and HDG 7, a leaf spring 11 is interposed to press the grinding surface 6 toward a surface to be ground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand disk grinder (hereinafter referred to as "HDG") used for finish grinding a ceiling, a wall or a floor of a construction site.

[0002]

2. Description of the Related Art Generally, a commercially available HDG converts an axis direction of a rotating shaft of an electric motor by approximately 90 degrees, attaches a disk-shaped grinding wheel to the converted rotating shaft, and applies the grinding wheel surface to a surface to be processed. It is designed to contact and grind.

[0003]

SUMMARY OF THE INVENTION Such a conventional H
DG is used without problems in operations such as deburring of cast frames and die forgings in ironsmiths, but is used in construction sites for finishing grinding of ceilings, walls, floors, or finishing tiled surfaces , Because the target area is large,
The DG must be swung a lot, and the finish grinding of the ceiling and wall will cause the operator to work on an unnatural posture on a stepladder, which will make the worker tired faster and cause work-related accidents. Had also become.

In addition, when the whetstone is used in such a state, it is very dangerous if the whetstone bites into the narrow dwarf portion of the building for some reason and is swung around. Therefore, it is necessary to immediately turn off the power and perform an emergency stop. There is a conventional HD
G does not take such measures.

[0005] In the finish grinding of the ceiling, wall, and floor, the disc-shaped grindstone surface must be in contact with the surface to be ground.
The operator needs to lie on his back or turn his body, and it is extremely difficult to bring the grindstone surface into contact with the surface to be ground with an appropriate pressure in such a posture.

Accordingly, in the case of an HDG used on a construction site, the HDG can be swung largely with a small amount of labor, and in the finish grinding of a ceiling or a wall, work can be performed safely without using a stepladder. Is desired.

In view of the above prior art, the present invention relates to an HDG used on a construction site, which can handle the HDG without using a stepladder or the like, without taking an unnatural posture, and It is another object of the present invention to provide an HDG in which a disc-shaped grindstone can be pressed against a surface to be ground with a constant pressing force.

[0008]

According to a first aspect of the present invention, a bracket is attached to a tip of a handle, and an HDG is perpendicularly mounted on a disk-shaped grindstone surface with a pin of the bracket as an axis. The switch is mounted so as to be swingable in the direction, and provided with a switch to which the power of the HDG is connected only when the handle is gripped by the grip portion of the handle.

In the present invention configured as described above,
The operation range of the HDG is large, and it is possible to finish a large area with a small amount of work. Since the HDG can be swung and fixed, the angle of the grindstone surface can be adjusted according to the finishing object such as the ceiling or wall surface, so it is not possible. There is no need to work in a natural position.

According to a second aspect of the present invention, a structure is provided in which the handle can be stretched and fixed.

In the present invention configured as described above,
By adjusting the length of the handle, the finish grinding operation can be performed without using a stepladder or the like.

According to a third aspect of the present invention, the bracket and the HD
A configuration is employed in which a spring that biases the grinding wheel surface in the direction pressed against the surface to be ground is interposed therebetween.

In the present invention configured as described above,
The work proceeds smoothly because the grindstone surface is urged toward the finish grinding surface by the spring interposed between the bracket and the HDG and pressed against the surface to be ground with an appropriate pressure.

[0014]

Next, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 3 relate to the first embodiment according to the present invention, in which the length of the handle 2 whose length can be adjusted by tightening and loosening the tapered cone 1,
A bracket 4 is attached by a thumb screw 3a, and an HDG 7 is attached so as to be swingable in a direction perpendicular to the grinding wheel surface 6 around a pin 5 of the bracket 4 as an axis.

The back of the handle 2 is provided with a cap tire cord (not shown) which is extended and connected to a power outlet. The grip 2g of the handle 2 has a power supply only when the operator grips the handle 2. A helical cord 9 is arranged at a portion where the handle 2 is extended to enable the handle 2 to be extended.

As shown in FIG. 2, a bracket 4 is attached to the distal end of the extension side handle 2 '. A fastening band 10 is attached to the bracket 4 around a pin 5 and the HDG 7 is attached to the fastening band 10. Are fastened by the thumb screw 3b. Therefore, the HDG 7 can swing freely in a direction perpendicular to the grinding wheel surface 6 and can be fixed.

FIG. 3 shows a state where the HDG 7 is swung around the pin 5 of the bracket 4 as an axis. This state is suitable for performing finish grinding of a ceiling or a high wall surface.

FIG. 4 shows that the leaf surface 11 is interposed between the bracket 4 and the HDG 7 so that the grindstone surface 6 is urged toward the finish grinding surface, and the grindstone surface 6 is pressed against the surface to be ground. The pressure is adjusted by the urging force of the leaf spring 11. Although a leaf spring is used in this embodiment, a torsion spring may be interposed between the bracket and the fastening band for fastening the HDG.

FIG. 5 is a view showing the state of the HD against the urging force of the leaf spring 11.
This shows a state where G7 is swung. In this state, HDG
7 is urged in the direction of the arrow by the leaf spring 11 and the grindstone surface 6 is pressed against the surface to be ground with a constant pressing force.
When the ground surface has unevenness, the unevenness is absorbed by the bending of the leaf spring 11, and the grinding operation can be performed smoothly.

In the above description, the case where the length of the handle can be adjusted has been described, but the case where the length of the handle cannot be adjusted is also included in the embodiment of the present invention.

[0021]

As described above, according to the present invention, H
By making the DG with a handle, it is possible to easily perform finish grinding of a large area, and by enabling the HDG to swing and fix it when necessary, finish grinding of ceilings and wall surfaces becomes easy, In addition, the spring urges the grindstone surface toward the surface to be ground, thereby absorbing irregularities on the surface to be ground and maintaining the pressing force on the surface of the grinding stone at a constant level. Is now possible.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is an enlarged front view of the HDG part of FIG. 1;

FIG. 3 is a state diagram in which the HDG in the first embodiment is swung.

FIG. 4 is a partially enlarged front view of the second embodiment.

FIG. 5 is a view showing a state in which the urging force of a leaf spring is applied in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Taper cone 2 Pattern 3a, 3b Thumb screw 4 Bracket 5 Pin 6 Grinding stone surface 7 Hand disk grinder (HDG) 8 Switch 9 Helical cord 10 Fastening band 11 Leaf spring

Claims (3)

[Claims] 1. A bracket is attached to a tip of a handle, and a hand disc grinder is attached so as to be swingable and fixed in a direction perpendicular to a disc-shaped grindstone surface using a pin of the bracket as an axis, and a handle is attached to a grip portion of the handle. The hand disk grinder is provided with a switch to which the power of the hand disk grinder is connected only when the user holds the hand. 2. The hand disk grinder according to claim 1, wherein said handle is extendable and fixed. 3. The hand disk grinder according to claim 1, further comprising a spring interposed between the bracket and the hand disk grinder in a direction in which the grindstone surface is pressed against the surface to be ground.