JPH0731933Y2 - Portable band saw - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a portable band saw board, and in particular, a portable band saw board suitable for preventing this jump out of a band with a chip sweeping device. It is about.

[Conventional technology]

This kind of saw blade is detached from the saw wheel when the saw blade is broken or deformed during cutting work, and it moves in the direction of the saw blade (Fig. 1). It was very dangerous because it sometimes jumped out (from below).

For this reason, as shown in FIG. 5, the conventional band saw has the entire circumference of the band saw 6 other than the cutting work portion D of the band saw 6 to prevent the band saw from popping out on the bottom surface of the band saw. Protective cover to cover
There were ten.

There is also a device for sweeping out the chips of the band, which was provided separately from this protective cover of the band.

[Problems to be Solved by the Invention] In the above-mentioned conventional technique, the protective cover 10 is used every time the band saw 6 is replaced.
If you don't attach or remove the strap, you can't put it on and take off.
Covers the entire bottom surface of the band saw, resulting in high cost and increased weight.

Also, this chip sweeping device for the band is very expensive because it is provided separately from the protective cover.

The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, to provide a portable band saw with a band saw pop-out prevention mechanism that is easy to attach and detach the band saw and has an inexpensive chip sweeping function. To do.

[Means for Solving the Problems]

The above-mentioned object is to provide one or more members for preventing the protruding of the band at a position facing the band saw blade on the extension of the band saw blade inside the saw cover covering the back side of the band saw. This is achieved by providing at least one of the members with a chip sweeping brush which is in contact with and faces the cutting edge of the band saw.

[Action]

A member provided on the inside of the saw cover at a position facing the band saw blade edge on the extension of the band saw blade to prevent the band from popping out, and a member provided in the band rising direction of the band. Since the chip sweeping brush is provided in this, it is possible to prevent the band from popping out, and the chip sweeping brush can be realized with a simple device.

〔Example〕

An embodiment of the present invention will be described in detail with reference to FIGS.

1 is a front view showing an embodiment of a portable band saw according to the present invention, FIG. 2 is a bottom view of FIG. 1 as seen from the direction of arrow A, and FIG.
The drawing is a cross-sectional view taken along the line BB in FIG. 1, and FIG. 4 is a bottom view when the band saw is attached.

In FIG. 1, a saw wheel 3 which is rotatable around a shaft 2 shown in FIG. 2 and a saw wheel 5 which is rotatable around a shaft 4 are juxtaposed on a frame 1 so as to face each other.

Further, an endless and flexible band saw 6 is mounted between the saw wheel 3 and the saw wheel 5. The saw wheel 3 is rotationally driven in the direction of the arrow C in the drawing by an electric motor (not shown) provided on the frame 1, whereby the band saw 6 is rotated.

Further, the frame 1 is provided with a saw cover 7 that covers the back side of the band saw 6 except for the cutting work portion D of the band saw 6. On this cover 7, a member 8 for preventing the protruding of the saw blade 6 facing the blade edge of the saw blade 6 on the extension of the blade edge of the saw blade 6 on the side of the saw blade 6 of the saw wheel 3 and the saw wheel 5 is provided. Sawwheel between 3,5
One or more is provided at a position that does not overlap the outer periphery of the.

As shown in FIG. 3, a member 8 provided on the cutting work side of the band saw 6 in the cutting direction of the band saw 6 is provided with a chip sweeping brush 9 which is in contact with the blade edge of the band saw 6 in a facing manner. Provided, member 8
Also serves as a mounting portion for the chip sweeping brush 9.

In the above configuration, when cutting, when the saw wheel 3 is rotated by the electric motor, the saw wheel 5 is rotated in conjunction with the band saw 6, and the band saw 6 is fed in the direction of arrow C. next,
The cutting work portion D of the band saw 6 is pressed against the workpiece to perform the cutting work. At this time, the chips generated by the cutting work are removed by the chip sweeping brush 9.

Also, when the band saw 6 breaks or deforms during cutting work, the band saw 6 falls off from the saw wheels 3 and 5 and tries to come out toward the blade tip of the band saw 6. The saw 6 contacts the member 8 and can be prevented from protruding from the saw cover 7.

To replace the band saw 6, slide the saw wheel 5 toward the saw wheel 3 in parallel as shown in FIG. 4 to reduce the distance between the saw wheels 5 and 3, and then remove the band saw 6. Bend the saw cover 7 so that it does not come into contact with the member 8 and attach it to the saw wheels 3, 5, and then
By sliding the saw wheel 5 parallel to the direction opposite to the saw wheel 3 to tension the band saw 6 and fixing the saw wheel 5, the band saw 6 can be easily attached and detached.

[Effect of device]

According to the present invention, when the band saw is replaced, a member for preventing the band saw from popping out, which does not require a protective cover to be attached and detached as in the conventional case, is provided on the saw cover. In addition to the above, the member can also serve as a mounting portion of the chip sweeping brush, and it is possible to provide a band sweeping-out preventing and chip sweeping device with an inexpensive structure.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a portable band saw according to the present invention, FIG. 2 is a bottom view seen from the direction of arrow A in FIG. 1, and FIG.
1 is a sectional view taken along the line BB in FIG. 1, FIG. 4 is a bottom view when a band saw is attached, and FIG. 5 is a conventional bottom view seen from the direction of arrow A in FIG. 1 is a frame, 2 and 4 are shafts, 3 and 5 are saw wheels, 6 is a band saw, and 7
A saw cover, 8 is a member, and 9 is a chip sweeping brush.

Claims (1)

[Scope of utility model registration request] 1. A pair of saw wheels facing the frame, an electric motor for rotating one of the saw wheels, and a bendable endless belt mounted on the outer circumference of the pair of saw wheels. Then
In a portable band saw board provided with a saw cover for covering the back side of the frame excluding this cutting work portion, a band saw blade inside the saw cover for covering the back side of the band saw One or more members for preventing this jumping out of the band are provided at positions on the extension opposed to the band saw blade edge, and at least one of the members is in contact with the band saw blade edge to contact the chip sweeping brush. A portable band saw board provided with.