JPH031210Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a saw that can collect dust, which is chips generated when cutting materials such as noncombustible boards, wooden boards, plywood, and plastic boards.

(Prior art) Conventionally, when cutting noncombustible boards such as asbestos calcium silicate plates and gypsum boards using a circular saw body, the upper side of the saw body is covered with a dust collecting cover body, and the dust collected during cutting is collected inside the cover body. Alternatively, a suction duct was attached to a case (cover) that covered the saw body, and the dust was collected from the duct into a dust collection bag via the case.

(Problem to be solved by the invention) However, with this type of saw, almost all the dust that scatters upwards from the noncombustible plate can be collected by the dust collection means, but the dust that scatters downwards cannot be collected. Furthermore, since this dust accounts for approximately 30% of all dust, it poses a problem of creating a poor working environment and harming the health of workers, and improvements were hoped for.

An object of the present invention is to be able to collect almost all of the dust that is scattered below the material to be cut when the material is being cut.

(Means for Solving the Problems) The features of the present invention are that the circular saw body for cutting the material to be cut is covered with an upper dust collection cover body, a bottom plate is attached to the bottom part,
For saws where part of the saw blade is exposed from the bottom plate,
A support body, a lower dust collector, a spring body, and a tilting guide means for the lower dust collector are provided on the bottom side of the saw. The support body includes a base plate attached to the bottom plate, a guide plate attached to the base plate in a hanging state and whose attachment position is opposite to the material to be cut with the saw body as the center, and the guide plate. It consists of a support plate attached to the bottom of the plate. The guide plate is movably inserted into one end of the lower dust collector, and the lower dust collector serves as a dust collection chamber that communicates with the inside of the upper dust collector cover from the top surface downward. A blind groove is provided, and the blind groove covers the saw blade exposed from the bottom plate, and the bottom of the groove is formed in a shape along the outer periphery of the saw body. The spring body connects the support plate and the lower dust collection cover body, and
The lower dust collecting cover body is biased by a spring in the direction of closely contacting the material to be cut. The tilting guide means for the lower dust collecting body includes a guide hole or a hinge for tilting the lower dust collecting cover body upward and in the moving direction of the saw body.

(Example) Examples of the present invention will be described below based on the drawings.

In Figures 1 and 2, the upper dust collection cover body 2 that covers approximately 3/4 of the circular saw body 1 has a dust storage chamber 2a inside, and this storage chamber is provided on the inner surface along the saw blade. It has enough space to accommodate dust entering from a certain dust intake port 2b. A slit 3a is provided in the bottom plate 3 of the upper dust collection cover body 2.
The lower saw blade of the circular saw body 1 is exposed below the bottom plate through this slit.

A support body 5 for supporting the lower dust collecting cover body 4 is attached to the lower surface of the bottom plate 3. This support body is a combination of a base plate 6, a guide plate 7, and a support plate 8 in an I-shape, and the base plate 6 located above is fixed to the bottom plate 3 of the upper dust collection cover body 2. A slit 6a in which a saw blade is positioned is formed opposite to the slit 3a.

The guide plate 7 is located on the left side in FIG. 2, that is, the mounting position is opposite to the gypsum board 11 with the saw body 1 at the center.

The lower dust collecting cover body 4 has a groove 4a cut in the rear end side thereof, extending from the rear end surface toward the front end side and reaching both the upper and lower surfaces. A guide plate 7 is inserted into this groove, and the lower dust collecting cover body 4 is located between the base plate 6 and the support plate 8. With the lower dust collecting cover body 4 positioned parallel to the base plate 6, the rear end of the lower dust collecting cover body is connected to the support plate 8 by a pair of coil springs 9 arranged on both sides of the guide plate 7. has been done. One end of the coil spring 9 is fixed to the upper surface of one side of the support plate 8, and the other end is hooked to the end of a guide rod 10 passing through the lower dust collecting cover 4.

The guide rod 10 movably passes through a guide hole 7a formed in the guide plate 7. Guide hole 7a
is a tilting guide means for tilting the lower dust collecting cover upward and in the moving direction of the saw body 1.
For this purpose, the guide hole 7a is formed as an inclined hole upwardly to the right. That is, the guide hole 7a is an inclined hole with the direction of movement of the saw (the direction of the arrow in FIG. 2) facing upward.
In addition, the lower dust collecting cover body 4 is located close to the guide rod 10.
A guide rod 10a that passes through the rear end portion in the width direction is inserted through the guide hole 7b. The direction of inclination of the guide hole 7b is the same as that of the guide hole 7a. The lower dust collecting cover body 4 is tiltable along the guide holes 7a and 7b via guide rods 10 and 10a, and is tilted as shown by the chain line in FIG. 2 by the spring force of the coil spring 9 when the saw is not in use. Although it is in elastic contact with the lower surface of the base plate 6, it can be brought into close contact with the lower surface of the gypsum board 11 during use.

A bag groove 4 serving as a dust collection chamber is provided on the lower dust collection cover body 4.
b is provided, and the gypsum board 11 is installed in this bag groove.
The saw blade of the circular saw body 1 exposed further downward is covered, and the bottom part is shaped along the outer periphery of the saw body 1 so that the distance from the saw blade is constant. The blind groove 4b can communicate with the slit 3a of the bottom plate 3. The tip of the cover body 4 is cut obliquely to form a guide surface 4c.

Next, the effect will be explained.

With one end of the gypsum board 11 positioned between the base plate 6 and the lower dust collection cover 4 and the base plate in contact with the upper surface of the gypsum board, the circular saw body 1 is rotated and the saw is moved in the direction shown by the arrow in FIG. Cut the plaster board by moving it in the direction. During the cutting process, one end of the gypsum board 11 moves to the left relative to the saw (in the direction opposite to the direction of the arrow in FIG. The cover body is pressed downward against the spring force of the spring 9 while making contact with the guide hole 7.
a, 7b from the position shown by the chain line in FIG. 2 to the position shown by the solid line, the cover body 4 is brought into close contact with the lower surface of the gypsum board 11, and cutting is continued with the cover body 4 in close contact with the lower surface of the gypsum board 11. Lower dust collection cover body 4
Since the gypsum board 11 is tilted, the gypsum board 11 can be moved smoothly, in other words, the saw can be moved smoothly.

The dust M above the gypsum board 11 is collected from the intake port 2b of the upper dust collection cover body 2 into the storage chamber 2a, and the dust below is collected from the bag groove 4b to the slits 6a, 3.
a, the dust is sucked into the upper dust collection cover body 2 and becomes dust.

Other embodiments are shown in FIGS. 3 and 4. The feature of the example shown in the third figure is the spring body. A plate spring is used as this spring body, and the left side of the plate spring 12 is formed into a mountain shape with a larger inclination angle than the right side, and the horizontal part is a shallow groove on the lower surface of the lower dust collecting cover body 4. It is held in position by Cover body 4
is in elastic contact with the lower surface of the base plate 6 due to the spring force of the leaf spring 12. This base plate is fixed to the bottom plate 3 of the saw by wing nuts 13. In addition, the bottom plate 3
The base plate 6 may also be used. The other structure of this example is substantially the same as the structure of the above example, and corresponding parts are given the same reference numerals.

In the example shown in the fourth figure, four hinges 14 are arranged to sandwich the guide plate 7, and both upper and lower end sides of each hinge are attached to the lower surface of the lower dust collecting cover body 4 and the upper surface of the support plate 8, respectively. The hinge 14 restricts the movement of the lower dust collection cover body 4. Further, the rod 10b supporting one end of the coil spring 9 on the guide plate 7 comes into contact with the rear end surface of the guide plate 7, and has the function of a stopper.

When cutting, the lower dust collection cover body 4 is attached to the spring 9.
moves from the solid line position to the chain line position against the spring force.

(Effect of the invention) As described above, according to the invention, the dust that scatters downward of the material to be cut is collected in the bag groove of the lower dust collection cover body and sent to the upper dust collection cover body, so when cutting It can collect all the dust in the air, prevent deterioration of the working environment, and is hygienic without adversely affecting the health of workers.It is easy to handle as there is no need for a means to discharge dust to the lower dust collection cover. Moreover, since the cover body also covers the saw blade, it is safe and can prevent damage to the saw blade. The lower dust collection cover body is attached so that it can be tilted, so that the saw can be moved smoothly.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a partially cutaway perspective view of the main parts, Figure 2 being a partially cutaway front view showing the state of use, Figures 3 and 2. Fourth
The figures are front views of main parts showing other embodiments. 1... Circular saw body, 2... Upper dust collection cover body, 3a
...Slit, 4...Lower dust collection cover body, 4b...
Bag groove serving as a dust collection chamber, 5...Support, 6...Base plate, 7...Guide plate, 7a, 7b...Tilt guide means, (guide hole), 8...Support plate, 9...Spring Body (coil spring), 11... Gypsum board, 1
2... Spring body (plate spring), 14... Tilt guide means (hinge), M... Dust.

Claims (1)

[Scope of Claim for Utility Model Registration] A saw in which a circular saw body for cutting a material to be cut is covered with an upper dust collection cover body, a bottom plate is attached to the bottom, and a part of the saw blade is exposed from the bottom plate. A support body, a lower dust collector, a spring body, and a tilting guide means for the lower dust collector are provided on the bottom side, and the support body is attached to a base plate attached to the bottom plate, and is attached in a hanging state from the base plate. , consists of a guide body whose installation position is opposite to the material to be cut with the saw body at the center, and a support plate to which this guide plate is attached at the bottom, and the lower dust collector is at one end of the guide body. The guide plate is movably inserted into the lower dust collecting body, and the lower dust collecting body is provided with a bag groove extending downward from the upper surface and serving as a dust collecting chamber that communicates with the inside of the upper dust collecting cover body. covers the saw blade exposed from the bottom plate, and the groove bottom is formed in a shape along the outer periphery of the saw body, and the spring body connects and supports the support plate and the lower dust collection cover body, and The dust collecting cover body is biased by a spring in a direction in which it comes into close contact with the material to be cut, and the tilting guide means of the lower dust collecting body is a guide hole or hinge that tilts the lower dust collecting cover body upward in the direction of movement of the saw body. A saw comprising: