JPS6337015Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to the structure of a step cutter that obliquely scrapes and removes the step portion of the overlapping seam of sheets.

[Prior Art]

Waterproof sheets are spread (spread) on the roofs of buildings, the bottoms of golf course ponds, and the bottoms of waste dumps to prevent water leakage or the outflow of hazardous waste fluids. As this waterproof sheet, for example, a rubber or plastic sheet is used.

In this sheet spreading, waterproof sheets of a predetermined width and length are used, and the peripheral edges of each sheet are overlapped and heat-sealed to form a heat-sealed seam while constructing a sealed floor surface.

Therefore, when allocating sheets on a sealed floor surface, a seam is required to overlap three sheets as shown in FIG. That is, it becomes necessary to further bond sheet C by heat fusion on the wide sheet obtained by bonding sheet A and sheet B by heat fusion.

In such a seam of three sheets, if sheet C is directly joined to a wide sheet made by jointing sheet A and sheet B, the arrow part in Fig. 1 will be the second
In the state shown in the figure, a gap is created at the edge of the sheet, creating a waterway W. Since this waterway communicates from the upper surface of sheet A to the lower surface of sheet C and causes direct liquid leakage, its repair is essential.

As shown in FIG. 3, the waterway W is generated by cutting off the edge (step part) of the sheet B diagonally or filling the area where the waterway is created with rubber or the like, and then forming the sheet C overlaid on it. This can be prevented by making it more familiar.

Conventionally, as a method for cutting down the stepped portion, a method of grinding with a grinder or a method of grinding with a heated knife or the like has been adopted regardless of the turning location such as a rooftop or a pond. However, such conventional methods not only require a long time to scrape off, but also
There is a drawback that the reliability of leak prevention is low because the shape after treatment is inaccurate and unevenness remains.

Furthermore, the method of filling the area where the waterway is formed has the disadvantage that it requires a great deal of time for turning and it is difficult to sufficiently improve the reliability of leak prevention.

〔the purpose〕

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet leveling machine that can easily and accurately scrape off the level difference in the overlapping seam of sheets, thereby eliminating the drawbacks of the prior art described above.

The feature of the present invention is to achieve the above object by providing a guide surface on the bottom surface of the cutter body that makes sliding contact with the stepped portion, and a structure in which a cutter having a predetermined inclined cutting edge is attached to a position adjacent to the side surface of the guide surface. .

〔composition〕

That is, according to the present invention, there is provided a sheet level difference remover for removing the level difference at the overlapping seam of sheets,
A guide protrusion having a guide surface that comes into sliding contact with the stepped portion is provided in the front-rear direction of the bottom surface of the main body, and a notch is formed on the side surface of the main body having a depth that reaches the guide surface and whose rear surface slopes upward. There is provided a sheet step cutter characterized in that a cutter having a cutting edge inclined backward is attached to the rear rising slope with the inner tip of the cutter substantially matching the lower edge of the guide surface.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 4 to 9.

4 to 9, the main body 1 is formed of a substantially rectangular parallelepiped block that is elongated in the front-rear direction, and a guide protrusion 2 extending in the front-rear direction is integrally provided at the center of the bottom surface of the main body 1. As shown in FIG. 6, the lower surface 2A of the guide protrusion 2 is a flat surface, and the side surface 2B thereof constitutes a vertical guide surface that slides into contact with the stepped portion.

A handle 3 is fixed to the upper surface of the main body 1, as shown in FIGS. 4 and 5.

Notches 4, 4 are formed in the middle of the side surfaces (both side surfaces in the illustrated example) of the main body 1. Each notch 4
has a depth that reaches the guide surface 2B, and its front surface 4A is a slope that is slightly inclined rearward and upward,
As shown in the figure, the rear surface 4B is inclined further rearward than the front surface 4A to form an upward slope.

A cutter 6 is fixed on the raised rear surface 2B of each notch 4 as shown in FIG. That is, by fastening the cutter holder 5 to the rear surface 4B with bolts 7, the cutter 6 is held between them, and the mounting angle (rake angle) of the cutter 6 is determined by the inclination angle of the rear surface.
The structure is such that it is determined.

As shown in FIG. 9, the tips of each cutter 6, 6 are formed with cutting edges 6A, 6A that are inclined outwardly and rearward in the attached state. Also,
As shown in FIG. 7, the mounting position of each cutter 6 is such that the inner side surface of the cutter 6 matches (or touches) the guide surface 2B (or the inner surface of the notch 4).
And, the inner tip of the cutting edge 6A is on the guide surface 2B.
The guide projection 2 is set at approximately the same height as the lower edge of the guide projection 2 (or the lower surface 2A of the guide projection 2).

If the material of the main body 1 is made of, for example, an aluminum alloy, the weight of the cutter can be reduced and it is convenient to carry. However, the material of each part of the cutter can be appropriately selected in consideration of the intended use.

Furthermore, when cutting a stepped portion, the guide surface 2B will come into sliding contact with the stepped surface at the portion in front of the cutter 6, so the length of this front portion in particular should be selected to a value that allows easy and accurate guidance. It is preferable. Furthermore, the height of the guide protrusion 2 can be appropriately selected in consideration of the height of the stepped portion, and the state in which either the lower surface 2A of the guide protrusion 2 or the bottom surface of the main body 1 is in contact with the surface of the workpiece Carry out the cutting work.

When shaving a step, the guide surface 2B on either side of the guide protrusion 2 (determined by the direction of the step or the direction of shaving) is brought into contact with the step part of the overlapping seam of the sheets, and in this state, the shaving tool is moved forward. If so, the stepped portion is cut into a predetermined slope shape determined by the shape of the cutting edge 6A. The shavings are automatically discharged upwards through the notch 4.

According to this embodiment, it is possible to remove the step at the overlapping seam of sheets by simply bringing the guide protrusion 2 into contact with the step and moving the cutter forward. A step cutter with excellent workability that can be easily carried out on site can be obtained.

Moreover, the shape of the stepped portion can be finished into a uniform and accurate shape simply by selecting the shape of the cutting edge of the cutter 6.

In the above embodiment, the cutters 6 are provided on both sides and the guide surfaces 2B are formed on both sides of the guide protrusion 2 to ensure the degree of freedom in the step cutting operation. It is also possible to provide a similar function and effect.

〔effect〕

As is clear from the above description, the present invention provides a novel step cutter that has excellent workability and can easily, uniformly, and accurately remove the step portion of the overlapping seam of sheets.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view showing a stepped portion in the case of expanding a waterproof sheet as an example, Fig. 2 is a sectional view taken along the line - in Fig. 1 when the stepped portion is not treated, and Fig. 3 The figure is a sectional view of the same part as in Figure 2 when the step is processed, Figure 4 is a side view of an embodiment of the level cutter according to the present invention, and Figure 5 is the line drawn in Figure 4. Fig. 6 is a sectional view taken along the line - in Fig. 4; Fig. 7 is a partially cutaway plan view taken from
8 is a sectional view taken along line - in FIG. 5, FIG. 9 is a sectional view taken along line XI--XI in FIG. 8. 1... Main body, 2... Guide projection, 2A... Lower surface of guide projection, 2B... Guide surface, 4... Notch, 4B
...Rear surface of notch, 5...Katsuta holder, 6...Katsuta, 6A...Blade tip, 7...Bolt.

Claims (1)

[Scope of utility model registration request] A sheet step cutter for removing steps at the overlapping seam of sheets, wherein a guide protrusion having a guide surface that comes into sliding contact with the step is provided in the front-rear direction of the bottom surface of the main body, and the depth reaches the guide surface on the side surface of the main body. a cutter having a notch whose rear surface forms a rearward upward slope, and a cutter having a cutting edge inclined outwardly and rearward, and attaching the cutter to the rearward upward slope with its inner pointed end substantially aligned with the lower edge of the guide surface. A sheet step cutter featuring: