JP2595868Y2 - Dust proof device for drilling machine - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a drilling machine called a hammer.
It relates to a dustproof device such as a rill .

[0002]

2. Description of the Related Art FIG .
This will be described with reference to FIG. Drilling machine 1 for holding tool 4
The tool holding part 2 is provided.
Is provided with a front cap 3 made of an elastic body.
You. On the outer periphery of the tool holder 2 having the front cap 3
Is generated at the time of drilling work material 12 as shown in FIG.
In order to prevent chips from scattering around workers,
A dustproof device having a mounting body 9 made of an elastic body is mounted.
I have. This dustproof device is arranged so as to cover the outer periphery of the tool 4.
Flexible cover cylinder 5, outer race 6, and rolling element
Body consisting of a ball 7, an inner race 8, and an elastic body
9 and the outer race 6
The torque is transmitted to the cover cylinder 5 between the knurling 8 and the knurling 8.
Ball 7 is provided as a rotating member for
Both members so that the cylindrical body 5 and the outer race 6 rotate integrally.
5 and 6 are locked. Further attached to inner race 8
When the tool holder 2 is rotated because the body 9 is provided,
The mounting body 9 and the inner race 8 are integrated with the tool holder 2.
Rotate and cover via the ball 7 and the outer race 6
The rotation is transmitted to the body 5. like this
Attach the dust proof device to the tool holder 2 and actually pierce the ceiling etc.
When the work is performed, the end face of the cover cylinder 5 comes into contact with the work material 12.
Between the end surface of the cover cylinder 5 and the work material 12
A friction force is generated. This rotates the inner race 8
Even if the cover cylinder 5 is prevented from rotating due to frictional force
Therefore, the arrangement between the outer race 6 and the inner race 8
The provided ball 7 covers the rotation of the inner race 8
5 cannot be transmitted and it is simply rolling.

In addition, the above dustproof device is mounted on the tool holder 2.
For this purpose, the mounting body 9 made of an elastic body is
The size of each diameter at the engagement portion is
The outer diameter of the tool holder 2 is the same or slightly larger
In a relationship. In other words, the diameter relationship between the two
To hold the tool while elastically deforming the mounting body 9
Since it can be inserted into the part 2, the frictional force generated during the elastic deformation
The mounting body 9 is mounted on the tool holding section 2 by means of.

[0004]

[Devised Problems to be Solved] of conventional as described above
The dust proof device is designed to have the outer periphery of the tool holding
To the work material
When the tool is not contacted, that is, when the tool is
When it is rotated, the dust proof device swings around due to the rotation of the tool holder.
From the drilling machine with the tool holder by centrifugal force.
There was a problem that would.

An object of the present invention is to solve the above-mentioned problems,
Excellent workability without detaching from the tool holder during load operation
An object of the present invention is to provide a dustproof device for a drilling machine.

[0006]

The object of the present invention is to cut a work material.
The cover cylinder arranged on the outer periphery of the tool to be drilled and the cover cylinder are
Outside of the tool holder, which is rotatable and rotates with the tool
And a mounting body made of an elastic body that is detachably disposed on the periphery.
In the dustproof device of the drilling machine, the dustproof device
To limit the movement of the
This is achieved by providing a projection that engages with the holding portion .

[0007]

As described above, the inner peripheral side of the mounting body made of an elastic body.
Is provided with a projection engaging with the outer periphery of the tool holding portion
In this way, it is possible to prevent the
Prevents the dust device from coming off in the axial direction of the tool holder.
I can.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A dustproof device for a drilling machine according to this embodiment is shown in FIG.
This will be described with reference to FIG. Figure 1 shows the dust proof device as a tool holder
2 is a partially longitudinal side view showing a state of being attached to FIG. 2, and FIG.
FIG. 2 is a sectional view taken along line II shown in FIG.
Part, 3 is a front cap, 4 is a tool, 5 is a cover cylinder,
6 is outer race, 7 is ball, 8 is inner race
, 9 is a mounting body, 10 is a protrusion, 11 is a slit, 12
Is a work material.

The drill 4 holds a tool 4 (drill bit).
A tool holder 2 for holding the tool is provided.
The holding part 2 is provided with a front cap 3 made of an elastic body.
Have been. Tool holder 2 having front cap 3
As shown in FIG. 1, the outer periphery of
To prevent chips generated in the machine from scattering around workers.
Therefore, a dustproof device having a mounting body 9 made of an elastic body
Is being worn. This dustproof device covers the outer periphery of the tool 4.
Flexible cover cylinder 5, outer race 6,
The ball 7, the inner race 8, and the elastic body
Outer race
Between the inner race 8 and the inner race 8
A ball 7 is provided as a rotating member for transmission.
The cover cylinder 5 and the outer race 6 rotate together.
The two members 5, 6 are locked. Furthermore, inner race 8
Is provided with the mounting body 9 so that the tool holder 2 is rotated.
Then, the mounting body 9 and the inner race together with the tool holder 2
8 rotates integrally, via the ball 7 and the outer race 6
Thus, the rotation is transmitted to the cover cylinder 5. This
A dustproof device such as the
When drilling work is performed on the end surface of the cover cylinder 5 and the work material 12
Contact the end surface of the cover cylinder 5 and the work material 12.
And a frictional force is generated. This allows inner lace
Even if 8 rotates , the cover cylinder 5 is prevented from rotating due to frictional force.
The outer race 6 and the inner race 8
The ball 7 disposed between the inner race 8 rotates
It cannot be transmitted to the cover cylinder 5 but simply rolls.

Further , the dustproof device is mounted on the tool holder 2.
In order to achieve this, in the engagement portion between the mounting body 9 and the tool holding portion 2,
The size of each diameter is determined by the tool holder 2 relative to the inner diameter of the mounting body 9.
Have the same or slightly larger outer diameter
You. With such a dimensional relationship, the tool holding unit 2
The mounting body 9 can be inserted while elastically deforming.
You. Further, as shown in FIG.
Slit 11 formed in the axial direction and the inner diameter of the mounting body
Having a smaller inner diameter than the outer diameter of the tool holding part
The part 10 is formed so as to form a substantially circular shape.

The mounting body 9 thus formed is held with a tool.
As it is fitted around the outer periphery of the part 2,
Since the inner diameter of the mounting body 9 is easy to expand,
The body 9 can be inserted into the tool holder 2 and further inserted.
Then, the protrusion 10 engages with the end of the tool holder 2.
The mounting body 9 comes out in the axial direction of the tool holder 2
Can be prevented. Therefore, the elasticity of the mounting body 9
Friction force generated at the time of deformation and retaining by the protrusion 10
Mounting body 9 mounted on the tool holder 2 by the
Is a state in which the end surface of the cover cylinder 5 is not brought into contact with the work material 12.
State, that is, when the tool holder 2 is rotated during the no-load operation.
Even if the mounting body 9 is securely mounted on the tool holder 2,
As a result, the dustproof device comes off from the tool
Can be prevented.

Therefore, during the no-load operation, the
Can be easily attached to the tool holder 2 without detaching
To provide a dustproof device for drilling machines with excellent workability and operability.
Can be obtained.

[0013]

[Effects of the Invention] According to the present invention , a dustproof device is provided in the axial direction of the tool.
For restricting the location moves, Engineering on the inner peripheral side of the instrumentation adherend
No load operation by providing a projection that engages with the
Drilling machine with excellent workability that does not come off from the tool holder
A dustproof device can be provided .

[Brief description of the drawings]

[1] The dustproof device ing to the present invention is attached to the tool holder
It is a partial vertical side view which shows the state which was set .

FIG. 2 is a sectional view taken along line II of FIG. 1;

FIG. 3 shows a conventional dust proof device mounted on a tool holder.
It is a partial vertical side view which shows the state which was set .

[Explanation of symbols]

1 is a drilling machine, 2 is a tool holder, 4 is a tool , 5 is a cover cylinder, 7 is a ball, 9 is a mounting body, 10 is a projection, and 12 is a cover.
It is a cutting material .

Claims (1)

(57) [Scope of request for utility model registration] 1. An outer periphery of a tool for drilling a work material
A cover cylinder and a tool rotatable with respect to the cover cylinder and the tool
Removably arranged on the outer circumference of the tool holder that rotates with
In a dustproof device for a drilling machine having a mounting body made of an elastic body, the dustproof device moves in the axial direction of the tool.
The tool holding portion is provided on the inner peripheral side of the
A dustproof device for a drilling machine, characterized in that a protrusion is provided for engaging with the drilling machine.