JPS588480Y2 - Hole puncher for one side of the bag or the side of the tube - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a punching device for punching circular holes, and more particularly, to a punching device for punching circular holes in one side of a bag or the side of a long tube.

An example of where it is necessary to make a circular hole on one side of a bag or on the side of a long tube is because a person undergoing colostomy places a bag or tube that contains excrement into the colostomy opening, so it is necessary to make a circular hole on one side of the bag or on the side of a long tube, depending on the size of the opening. An example of this is when a circular hole is drilled.

Conventionally, for this purpose, a bag or tube is folded in two at a desired position, and a semicircle is cut out and expanded along a pre-drawn circle to form a circle, or a receiver is placed on the inner surface of the bag or tube. The method of inserting a stand and punching with a punch is used, but the former requires a circle to be drawn in advance, which is cumbersome and difficult to obtain a perfect circle, and the latter causes damage to the stand and punch, resulting in poor sharpness. There is a need for an instrument that can easily and reliably punch out a perfect circle.

This invention provides a new circular hole puncher that eliminates the above-mentioned drawbacks.

The inventors believe that it is easy to fold one side of the bag or the side of the tube in two vertically, and that if you punch out a semicircle with the diameter of the fold line from the folded sheet and unfold the sheet, it becomes a circular shape. Focusing on the ability to form holes, a punching tool was devised to achieve this purpose.

The circular hole puncher according to this invention is explained based on the drawings.
A horizontal semicircular notch groove 2 is provided in the body of the hollow cylinder 1, and the depth of this groove 2 almost reaches the center of the cylinder.

Further, a horizontal arm 3 is attached to the lower end, and the horizontal arm 3 is covered with a synthetic resin coating 4 for easy grip.

The bottom of the covering 4 is on the same horizontal plane as the bottom of the hollow cylindrical body 10.

A block 10 is attached to the front upper end of the hollow cylindrical body 1,
One end of a bar rod 11 is mounted on the block 10, and the rod rod 11
The rear half of the handle is coated with synthetic resin 12 for easy grip.

The cylinder 6 fits into the inner wall of the hollow cylindrical body 1, and a shaft 7 is provided protrudingly on the center line of the cylinder 6, and a through hole 13 bored in the rod 11 is inserted into the head of the shaft 7. and bolt 1
4 is screwed on.

As the rod 11 of the cylinder 6 moves up and down around the pivot point, a vertical groove 8 provided in the cylinder 6 protrudes from the inner wall of the hollow cylindrical body 1, and a guide protrusion 5 that fits into the vertical groove 8 is inserted into the cylinder 6. While being guided, it slides up and down the inner wall of the hollow cylindrical body 1.

The front half of the lower bottom of the cylinder 6 forms a forward-inclined blade surface 9.

The reason why the blade surface is tilted forward is that when the blade surface is simultaneously pressed against the sheet inserted into the semicircular notch groove, a large shearing force is required and the sheet cannot be cut cleanly.

Further, a spring 15 may be installed between the rear upper surface of the hollow cylindrical body 1 and the bar rod 11, and the spring 15 causes the blade surface of the cylinder 6 to be located above the semicircular notch groove 2.
The rod 11 can be pushed up.

To make a circular hole on one side of a bag or in a long tube, fold the bag or tube in two along the lengthwise direction, let the two-fold line reach the deepest part of the semicircular notch, and insert the rod rod 1.
All you have to do is press down on 1, punch out a semicircle from the sheet, pull it out, and then unfold it.

In the case of a bag or tube made of a plastic material such as paper, the crease is clear and the width t of the semicircular notch groove is
If is made sufficiently small, then when the horizontal distance from the center of the chord of the semicircular notch groove to the end face of the cylinder 6 is l,
Even if l is set equal to the radius r of the cylinder 6, it is possible to make a vertically symmetrical semicircular, ie, a perfect circular hole.

If the sheet is somewhat thick and elastic, it cannot be creased and the folded portion will be rounded, so it cannot be inserted unless the width t of the semicircular notch is widened to a certain extent.

If the width t of the semicircular notch groove is wide, and the above l is set equal to r, the circle after expansion becomes an elongated ellipse, and such an ellipse is difficult for the patient undergoing colostomy to associate with the opening. This is not preferable because the deviation becomes large.

When this elastic sheet is inserted and cut as shown in FIG. 3, the cutting edge first hits the cylindrical inner wall contact part of the folded sheet 16 as shown in FIG. The sum is longer than twice the radius r of the cylinder 6.

Therefore, in order to obtain a perfect circle, curve AB, arc BC and curve C are required.
A' is approximated by a line segment AB, a semicircle BC, and a line segment CA', respectively, and assuming that the sum is equal to twice the radius r of the cylinder 6, from the center of the semicircular notch groove to the end face of the cylinder 6. The vertical distance l is determined by the following equation.

On the other hand, by setting l as described above and providing a semicircular notch groove, it is possible to make a correct circle on one side of the elastic bag or on the side of the tube.

When punching, since the bottom of the hollow cylindrical body and the bottom of the horizontal arm are on the same horizontal plane, it is stable even when placed on a table. Instead of punching out the folded sheet, a punching tool may be placed on a table and the rod 11 may be pressed down to punch out the sheet.

Since this invention has the above-described configuration, the punching machine of this invention can easily punch a correct circle on one side of a thick, flexible bag and on the side of a tube.

[Brief explanation of drawings]

Figure 1 is a perspective view of a circular hole puncher according to the present invention, Figure 2 is a vertical cross-sectional view passing through the center of the circular hole puncher, and Figures 3 and 4 are a half of an elastic bi-folded sheet. It is an explanatory view showing a state when inserted into a circular notch groove. 1...Hollow cylindrical body, 2...Semicircular notch groove, 3...Horizontal arm, 6...Cylinder, 9... Cylinder blade surface, 11...
Bar rod, 14...bolt, 16...bi-fold sheet.

Claims (1)

[Claims for Utility Model Registration] A hollow cylindrical body 1 having a horizontal semicircular notch groove 2 whose depth reaches almost the center in the body and a horizontal arm 3 attached to the lower end.
and slides up and down along the inner wall of the hollow cylindrical body 1, forming a lower bottom portion corresponding to the semicircular notch groove 2 on the forward inclined blade surface 9,
It consists of a cylinder 6 with a shaft 7 at the center of its upper surface, and a rod 11 whose one end is pivoted on a block 10 attached to the front upper part of the hollow cylindrical body 1, passing through a through hole 13 of the rod 11,
A bolt 14 is screwed onto the head of a shaft provided in the cylinder 6, and when the width of the notched groove is t and the radius of the cylinder is r, it extends from the center of the chord of the semicircular notched groove to the inner wall of the cylinder. A tool for punching out circular holes on one side of a bag or on the side of a tube, characterized in that the horizontal distance l between the holes is determined by the following formula.