JPH1190725A - Cutter for cylindrical down pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily cut a down pipe and form a beautiful cut section by connecting a right semicylinder for surrounding the right half of the down pipe to the left semicylinder for surrounding the left half of the down pipe in such a state as opening/closing freely. SOLUTION: A right semicylinder 3 and a left semicylinder 4 are opened and the left semicylinder 4 is closely applied to the external face of a down pipe 1. Secondly, an opening/closing hook 7 is rotationally moved so that its engaging ring 8 is hooked on a hook 9 and, when the opening/closing hook 7 is fastened, a cutter 11 of the right semicylinder 3 bites into the down pipe 1. Then, if the down pipe 1 is rotated in the direction shown by an arrow with it held with the both hands, the down pipe 1 is easily cut by the action of the acute cutter 11. Meanwhile, the right semicylinder 3 and the left semicylinder 4 are closely stuck to the down pipe 1 to be prevented from vertically deviated so that the cutting start and the cutting end are coincided with each other to form a beautiful cut section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter for a regular cylindrical downspout.

[0002]

2. Description of the Related Art Conventionally, downspouts are usually cut with a saw.

[0003]

When the downspout is cut with a saw, the start and end of the cut do not coincide with each other, and a complicated manual operation is required to finish the cut. In addition, saw "burr" in cut
I had to remove this as well.

[0004]

Therefore, the present invention provides a right half cylinder 3 surrounding the right half of the downspout 1, a left half cylinder 4 surrounding the left half of the downspout 1, and the right half cylinder. A hinge 5 for opening and closing the left half cylinder 4 and the left half cylinder 4, and an opening / closing hook 7 having an engagement ring 8 attached to an end 6 of the right half cylinder 3;
A key 9 to which an engagement ring 8 of an openable / closable hook 7 attached to an end of the left half cylinder 4 engages, an outwardly protruding finger hook 10 attached to the right half cylinder 3, The tip is sandwiched between two mounting plates 12 fixed to the outer surface of the right half cylinder 3 and has a replaceable cutter 11 protruding from the inner surface of the right half cylinder 3. .

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a downspout, which is formed of a regular cylindrical synthetic resin. Reference numeral 2 denotes a metal cutter for cutting this, which is composed of a right half cylinder 3 surrounding the right half of the downspout 1 and a left half cylinder 4 surrounding the left half of the downspout 1. The left half cylinder 4 is connected with a hinge 5 so as to be freely opened and closed. The right half cylinder 3 and the left half cylinder 4 are obtained by dividing a metal pipe into two parts, and are formed just in the width of the palm. The hinge 5 is welded to the right half cylinder 3 and the left half cylinder 4, respectively.

[0006] At the end 6 of the right half cylinder 3, an openable / closable hook 7 is provided.
At the end of the left half cylinder 4, a key 9 with which the engaging ring 8 of the openable / closable hook 7 engages is attached. The finger rest 10 and the cutter 11 are attached to the right half cylinder 3. The finger hook 10 has the same width as the width of the right half cylinder 3, and has a shape gradually projecting outward. The cutter 11 is sandwiched between two mounting plates 12 fixed to the outer surface of the right half cylinder 3 and is detachably fixed by screws 13, and its tip protrudes from the inner surface of the right half cylinder 3.

[0007]

Next, the operation will be described. When the right half cylinder 3 and the left half cylinder 4 are opened and the left half cylinder 4 is exactly fitted to the outer surface of the downspout 1 as shown in FIG. Since it protrudes from the inner surface, the right half cylinder 3 comes into contact with a slight gap as shown in FIG. Then, FIG.
When the opening / closing hook 7 is rotated and the engaging ring 8 is hooked on the hook 9 and the opening / closing hook 7 is tightened as shown in FIG. 4, the cutter 11 of the right half cylinder 3 is attached to the downspout 1. Bite.

[0008] Therefore, when holding with both hands as shown in FIG. 5 and rotating as shown by the arrow, the downspout 1 is easily cut by the action of the sharp cutter 11. In the meantime, the right half cylinder 3 and the left half cylinder 4 are in close contact with the downspout 1 and do not shift up and down. Note that a gap may be formed between the inner surfaces of the right half cylinder 3 and the left half cylinder 4 for the purpose of reducing the rotation resistance.

[0009]

According to the prior art, the downspout is cut with a saw. When the downspout was cut with a saw, the start and end of the cut did not match, and it required a laborious manual operation to finish it. Also, the saw had a "burr" on the cut, which had to be removed. However, the present invention relates to a downspout 1
A right half cylinder 3 surrounding the right half of the downspout, a left half cylinder 4 surrounding the left half of the downspout 1, a hinge 5 connecting the right half cylinder 3 and the left half cylinder 4 to be openable and closable, An opening / closing hook 7 having an engagement ring 8 attached to the end 6 of the half cylinder 3, a key 9 to which the engagement ring 8 of the opening / closing hook 7 attached to the end of the left half cylinder 4 engages, An outwardly protruding finger hook 10 attached to the right half cylinder 3 and two mounting plates 12 fixed to the outer surface of the right half cylinder 3 are sandwiched between the finger hooks 10 and the tips project to the inner surface of the right half cylinder 3. The right half cylinder 3 and the left half cylinder 4 are opened, and the left half cylinder 4 is brought into close contact with the outer surface of the downspout 1 because the right half cylinder 3 and the left half cylinder 4 are opened. The right half cylinder 3 is brought into contact with the cutter 11 with some clearance due to the cutter 11, and the opening / closing hook 7 is rotated to engage the engagement ring. The multiplied by key 9, when the retractable hook 7 fastening, 喰Komi cutter 11 of the right half cylinder 3 in downpipes 1, where, has both hands, is rotated as indicated by the arrow,
The downspout 1 is easily cut by the action of the sharp cutter 11. In the meantime, the right half cylinder 3 and the left half cylinder 4 are in close contact with the downspout 1 and do not shift up and down.

[Brief description of the drawings]

FIG. 1 is a plan view in which a right half cylinder and a left half cylinder are opened.

FIG. 2 is a plan view in which a right half cylinder and a left half cylinder are wound around a downspout.

FIG. 3 is a right side view of the mounting plate of FIG. 2;

FIG. 4 is a plan view in which a right half cylinder and a left half cylinder are fastened to a downspout.

FIG. 5 is a perspective view of cutting a downspout.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Downspout, 2 ... Metal cutter, 3 ... Right half cylinder, 4 ... Left half cylinder, 5 ... Hinge, 6 ... End, 7 ... Opening / closing hook, 8 ... Engagement ring, 9 ... Key, 10 ... Finger hook , 11 ... Cutter, 12
... Mounting plate, 13 ... Screws.

[Procedure amendment]

[Submission date] November 13, 1997

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 5

Claims (1)

[Claims] 1. A right half cylinder 3 surrounding a right half of a downspout 1
A left half cylinder 4 surrounding the left half of the downspout 1 and a hinge 5 for connecting the right half cylinder 3 and the left half cylinder 4 to be openable and closable.
The opening / closing hook 7 having an engagement ring 8 attached to the end 6 of the right half cylinder 3 and the engagement ring 8 of the opening / closing hook 7 attached to the end of the left half cylinder 4 are engaged. A key 9, an outwardly protruding finger hook 10 attached to the right half cylinder 3, and two mounting plates 12 fixed to the outer surface of the right half cylinder 3, the tip of which is held between the right half cylinder 3 A cutter for a regular cylindrical downspout, comprising a replaceable cutter 11 protruding from the inner surface of the pipe.