JPS585588Y2 - masking cutter - Google Patents

Description

[Detailed explanation of the invention] This invention is applicable when using plastic plates for window glass etc.
This invention relates to a masking cutter that simultaneously cuts a predetermined width around the periphery of a masking that protects both the front and back sides of a plastic plate.

Generally, when plastic plates such as polycarbonate or acrylic are used as window glass, the masking of the plastic plates is removed after the construction of the entire building is completed to prevent the plastic plates from being damaged by other construction work.

In this case, before fitting the plastic plate into the sash, it was necessary to remove the masking around the edge of the sash where it would fit into the sash and fold it, or cut it and peel it off, which was very time-consuming. It was a hassle.

The present invention has been developed in view of the above points, and its purpose is to fit around the periphery of a plastic plate that is masked on both the front and back sides, and damage the plastic plate by a certain width of the periphery of the masking. To provide a masking cutter capable of cutting both the front and back sides simultaneously without cutting.

The present invention will be described in detail below based on examples.

1 is a space 2 consisting of the upper and lower horizontal inner surfaces and the vertical inner surface on one side.
It is a sliding body having a U-shaped cross section, and has an upper plate 4 and a lower plate 5.
and spacer 8.

The upper plate 4 is divided into a front upper plate 9, a rear upper plate 10, and an upper side plate 11.
They are screwed together at 7a and are formed into a substantially U-shape.

The lower plate 5 has the same shape as the upper plate 4.

That is, the front lower plate 12, the rear lower plate 13, and the lower side plate 14 are separated, and the front lower plate 12, the rear lower plate 13, and the lower side plate 14 are screwed together with the bottle 17b, forming a substantially U-shape. has been done.

The upper surfaces of the front upper plate 9 and the front lower plate 12 are chamfered to form an opening edge 18 for drawing out chips.

A plurality of insertion holes 19 are bored on each side of the spacer 8, and bolts 20 are inserted between the upper plate 4 and the lower plate 5 through appropriate insertion holes 19 of the spacer 8. 2
0 and tighten the nut 21.

Thus, an opening 3 passing through the space 2, the upper plate 4, and the lower plate 5 is formed.

A cutting opening surface 6 is provided in the opening 3 so as to face the vertical inner surface of the sliding body 1, and a taper 22 is provided at the lower end of the cutting opening surface 6.

A cutter 7 is attached to the cutting opening surface 6 so that the cutting edge is located between the upper and lower ends of the taper 22.

A convex portion is provided at the upper end of the cutting opening surface 6 to allow the back of the cutter 7 to rest against it, making it easier to adjust the height of the cutting edge.

Further, the sides of the upper plate 11 and the lower plate 14 opposite to the cutting opening surface 6 are also chamfered 23 to facilitate insertion of the plastic plate 15.

On the other hand, the upper and lower sides of the vertical inner surface of the spacer 8 are chamfered at 24 to facilitate peeling off the corners of the masking film 16.

Note that the spacer 8 is made of a plurality of different thicknesses.

A plastic plate 1 made of polycarbonate, acrylic, etc. is coated with a masking film 16 such as paper, polyethylene film, or polypropylene film on both the front and back sides.
In step 5, cutting a constant width around the periphery of the masking film 16 is performed as follows.

The sliding body 1 is fitted to the peripheral edge of the plastic plate 15, and the corners of the masking film 16 on the front and back sides are peeled off and taken out from the opening 3 upward and downward.

Then, a portion of a certain width of the masking film 16 hits the cutting edge of the cutter 7 and is cut.

After cutting each of the chips 16a and 16b to the point where they can be held together, the chips 16a and 16b on the front and back sides are hooked on the chip drawer opening edge 18 and pulled in the cutting direction at the same time. If the masking film 16 is pressed against the plastic plate 15, the cutter 7 can simultaneously cut a certain width of the periphery of the masking film 16 on both the front and back sides.

FIG. 6 shows another embodiment, showing an upper plate 11 and a lower plate 1.
A rotary roller 25 is attached near the center of the roller 4.

The rotating roller 25 is mounted so as to maintain a constant angle θ in the cutting direction, and has a gap such that it presses the plastic plate 15 pushed into the space 2 from above and below.

Said angle is between 5 and 20 degrees, preferably 10'. In such an embodiment, the chips 1 are removed as in the previous embodiment.
Pull out 6a and 16b from opening 3 and remove chips 1 from both the front and back sides.
When 6 a and 16 b are pulled in the cutting direction, the cutter slides and at the same time the roller 25 rotates, so the roller 25 presses the cutter against the plastic plate 15 and only pulls the chips 16 a and 16 b. The peripheral edge of the masking film 16 can be cut to a certain width.

As described above, since the peripheral edges of both the front and back sides of the masking film 16 are simultaneously pulled and cut by the cutter 7, the front and back masking films 16 can be cut at the same time.

Furthermore, since the masking film 16 is cut by sliding, the cutter does not require a long ruler, and the cutter can be made compact, making it convenient to carry.

Furthermore, since the cutter 7 is inside, it is safe to handle, and can be easily replaced by loosening the bolts 17a and 17b and removing the upper plate 11 to the lower plate 14.

Furthermore, since the cutting opening surface 6 is provided with a taper 22, the cutting edge of the cutter 7 directly contacts the masking film 16, resulting in good sharpness.

Also, since the top and bottom are the same shape, it can be used even if you are left-handed by flipping the cutter over.

Furthermore, since the cutter is compact and slides along the periphery of the plastic plate 15, it is possible to cut the masking film 16 of a constant width even if the periphery of the plastic plate 15 is slightly curved.

Further, since the spacer 8 has a plurality of through holes 19, the cutting width of the masking film 16 can be freely changed by changing the through holes 19 through which the bolts 20 are inserted.

Furthermore, by replacing the spacer 8 with one having a different thickness, the masking film 16 of the plastic plate 15 of a different thickness can be cut.

Further, since the front upper plate 9 and the front lower plate 12 are provided with the chip drawer opening edge 18, the chips 16a and 16b are pulled up while in contact with the chip drawer opening edge 18, and cutting is smooth. .

Further, in the embodiment shown in FIG. 6, since the cutter is pressed against the plastic plate 15 by the roller 25, the masking film 16 on both the front and back sides can be cut by simply pulling the chips 16a and 16b.

In the above embodiment, the upper plate 4 and the lower plate 5 were made of three members, but it is also possible to mold them into one piece, embed a magnet in the cutting opening surface 6, and magnetically attach the cutter 7. good.

Furthermore, the upper side plate 11 and the lower side plate 14 are eliminated, and the cutter 7
may be attached directly to the front and rear plates.

Further, depending on the material of the sliding body 1, a blade may be formed at the lower end of the cutting opening surface 6 itself at a height flush with the upper and lower horizontal inner surfaces without providing the taper 22 on the cutting opening surface 6.

Of course, the opening 3 is not on both the upper and lower sides of the sliding body 1, but only on one side.
and the cutting opening surface 6, the cutter 7, and the opening edge 18 for drawing out chips.
It is also possible to provide

Since the present invention is constructed as described above, the sliding body is fitted to the periphery of a plastic plate having masking films on both the front and back sides, the corners of the masking film are taken out from the upper and lower openings, and the upper and lower chips are simultaneously cut. By pulling on the plastic plate, the sliding body slides and cuts a certain width of the periphery of the masking film on the front and back sides, and the chips are drawn out, making it possible to cut the masking films on the front and back sides at the same time without damaging the plastic plate. It is.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a front view of the same, Fig. 3 is a side view of the same, Fig. 4 is a front center vertical sectional view of the same, and Fig. 5 is a front view of the same. A perspective view of the device in use, and FIGS. 6A and 6B are a plan view, a front view, and a side view of other embodiments. Explanation of symbols 1...Sliding body, 2...Space, 3...Opening, 4...Top plate, 5...
... Lower plate, 6 ... Opening surface for cutting, 7 ...
... Cutter, 18 ... Chip drawer opening edge,
22...Taper

Claims (1)

[Scope of utility model registration request] A sliding body having a U-shaped cross section having a space consisting of upper and lower horizontal inner surfaces and a vertical inner surface on one side, an opening provided vertically through both the upper plate and the lower plate of the sliding body, and a cutting opening surface of the opening provided to face the vertical inner surface;
a taper provided at the lower end of the cutting opening surface; a cutter mounted on the cutting opening surface such that the cutting edge is located between the upper end and the lower end of the taper; A masking cutter consisting of an opening edge for drawing out chips provided in an opening.