JP2007325817A - Cutter for soft and thin material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter which enables even an older person or a person with weak hands to drill a through-hole with the desired size on a soft and thin material such as a surface plate of a stoma. <P>SOLUTION: The cutter 1 for soft and thin materials includes a cutting blade 4, and the upper blade and the lower blade are opened forward at each base end continuously to make V-shaped or U-shaped side view, and the cutting blade 4 is bent in the left or right direction of the flat view. The soft and thin material is pushed forward on the valley part where the upper blade 2 and the lower blade 3 are connected and cut, and the cutting blade 4 is pressed in the inner direction by the reactive force of the soft and thin material, and then cutting/drilling can be easily performed along the cutting line of the curve body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cutter (cutting blade) that is easy to cut through a curved hole with a desired size through a soft thin material. The “soft thin material” referred to in the present invention is a sheet material made of rubber or synthetic resin, a flexible material represented by paper, leather, etc., or wood such as a balsa for work. However, it is a concept including not only a film but also a sheet material or a thin plate material having a certain thickness.

  For example, in the treatment of colorectal cancer, bladder cancer, ulcerative colitis and the like, a stoma (called colostomy or artificial bladder) is often constructed. In patients who have undergone stoma surgery (referred to as ostomate), a stoma device that stores stool or urine that is involuntarily excreted due to the absence of sphincter muscles is routinely worn, and in one week It must be replaced as appropriate at intervals of about twice.

  A stoma device is generally composed of a soft synthetic resin face plate that serves as an adhesion part to the skin, and a stoma bag for storing excrement, which passes the excrement from the stoma into the stoma bag. A through hole is provided. Some of the commercially available stoma appliances are called precut products in which a circular through-hole is previously formed in the face plate, but the shape of the stoma varies from patient to patient and is often not a perfect circle. Therefore, in many patients, when replacing the stoma, the face plate is punched by itself or its family in accordance with the shape of each person's stoma.

  Here, the through hole in the face plate of the stoma device is preferably about 1 mm larger along the outer shape of the stoma (Non-Patent Document 1). If the through-hole is too large, the area where excrement comes into contact with the skin increases, which may adversely affect the skin. On the other hand, if the through-hole is too small, the face plate contacts the stoma and stimulates the stoma. May still have an undesirable effect. Therefore, it is extremely important for patients to properly open the holes in the face plate according to the shape of the stoma, but handling of medical scissors is not always easy and accurate for patients who are often elderly and their families. A certain amount of skill was required to open a through hole of a proper shape and size.

  On the other hand, various cutters are often used for punching a sheet material made of a flexible material. Even in the stoma face plate as described above, for example, thread cutting for handicrafts comprising a V-shaped or U-shaped cutting blade in a side view in which the upper blade and the lower blade are continuously opened forward at the respective base ends. A cutter using the cutter is provided as an opening tool. However, since these thread trimming cutters and punching tools are both straight in plan view and not curved in either one of the left and right directions, they are not necessarily suitable for drilling operations that are mainly curved. In the same thread trimming cutter, the blade and grip are arranged on the same straight line, so the blade surface hits the face plate diagonally and does not function effectively, and the grip and hand are easy to touch the face plate. There was also a problem that it was difficult.

  As yet another jig used for drilling a face plate, a type of cutter (Patent Documents 1 and 2) that perforates while pressing a circular blade along a guide rod is known. However, since these cutters use a circular blade, they can only be used for drilling in a circular or oval shape and cannot cope with a complicated stoma shape. Moreover, since these cutters are bulky and heavy, there is a disadvantage that they are not suitable for carrying.

JP 2000-166952 A JP 2001-149396 A "Practical stoma care" edited by Sadao Anazawa, published by Helus Publishing 2000, 40 pages

  The present invention has been made in view of the circumstances as described above, and the problem to be solved is that for an elderly person or a person with weak hand strength, a soft thin material such as a face plate of a stoma device is used. Another object of the present invention is to provide a cutter capable of easily drilling a through hole having a desired size.

  In order to solve the above-mentioned problem, the soft thin material cutter according to the present invention has a V-shaped or U-shaped cutting blade in which the upper blade and the lower blade are continuously opened at the base ends in a front view. It was assumed that the cutting blade was curved in either one of the left and right directions in plan view. Insert the lower blade into a small hole opened in the soft thin material, apply the soft thin material to the valley between the base ends where the upper blade and the lower blade are continuous, and draw the soft thin material forward, or the cutting blade If you cut to push forward (push), the cutting blade is pressed inward by the reaction force of the soft thin material that contacts the curved cutting blade. It becomes easier to inward.

  The bending direction of the cutting blade is not limited to any one of the left and right directions in plan view because the usability varies depending on the user's dominant hand and the cutting situation. For example, if you are a right-handed person, when you want to open a large hole, if you place a soft thin material on a flat surface such as a desk and cut it, the tip is in the left direction (counterclockwise in plan view) In many cases, it is easy to use the one formed on the side, but when cutting in the air while supporting a soft thin material with the left hand, it is easy to use the one with the tip formed in the right direction (clockwise in plan view) Many. However, when trying to open a small hole, it is easy to use even if the tip is in the left direction. Note that the cutting blade does not have to be curved from the tip to the base, but at least each base where the upper blade and the lower blade are continuous so that the soft thin material being cut contacts. The end valleys and some of the front and back must be curved.

  Further, the degree of curvature of the cutting blade may be set in relation to the desired diameter of the through hole, but in general, it is better to cut and drill a small curvature through hole with a cutting blade with a large curvature than the opposite case. Since it is easy, it is preferable to set it to be equal to or slightly larger than the desired radius of the through hole.

  The curved cutting blade in the soft thin material cutter can be formed with a one-sided blade surface whose inner side is flush, in other words, a blade surface whose only outer side is inclined at an acute angle. By providing a so-called “skin surface” on the outside of the cutting blade, the reaction force applied from the soft thin material to the outside of the cutting blade is further increased, and the advancing direction of the blade edge during the drilling operation tends to bend naturally inward. In addition, the cut soft thin material can easily escape outward. In addition, the material and cutting angle of a cutting blade are set by a conventional method. For example, the cutting angle is generally set in light of the viewpoint that cutting edge does not easily occur and the cutting force does not increase and the material of the soft thin material to be cut, and more specifically, 19 for soft paper quality. A narrow blade angle of about 15 degrees, a wide blade angle of about 23 degrees for hard paper, or a range of 10 to 20 degrees for a soft thin material such as a stoma face plate.

  The attachment part to the main body grip in the cutting blade of the cutter for soft thin material according to the present invention can be provided by being displaced above a virtual horizontal line passing through the middle between the upper blade and the lower blade. In other words, by providing a mounting part to the main unit grip on the upper edge of the upper blade, the length of the rear holding portion of the cutting blade, that is, the portion of the cutting blade from the valley between the upper blade and the lower blade to the rear edge is shortened. Therefore, the contact portion between the soft thin material and the cutting blade during the drilling operation is reduced, and the frictional resistance between them can be suppressed. In particular, soft thin materials such as viscous rubber tend to have a high frictional resistance during cutting. Therefore, in order to enable cutting and drilling with a smaller force, it is important to suppress such frictional resistance. In order to further suppress the frictional resistance of the cutting blade, a resin film processing such as polytetrafluoroethylene may be applied to portions other than the blade surface by a conventional method.

  Further, in the soft thin material cutter according to the present invention, the body grip is extended obliquely upward with respect to a virtual horizontal line passing through the middle of the upper blade and the lower blade in the cutting blade, so that the drilling operation can be performed. Therefore, it is possible to prevent the main body grip and the hand of the operator from coming into contact with and interfering with the soft thin material. The extending angle of the main body grip with respect to the cutting blade is preferably set to be laid down so as to follow the direction in which the soft thin material is pushed through.

  Furthermore, in the cutter for soft thin materials according to the present invention, a sphere can be extended to each cutting edge of the upper blade and the lower blade. The sphere need not be a strict round sphere, but can be oval shaped as long as it can prevent the user from being injured by the blade tip or being damaged by contact with other objects such as a stoma bag. The shape may be a polyhedron or the like, and may be formed integrally with the cutting blade or retrofitted as a separate body. In particular, the sphere provided at the tip of the upper blade also has a function as a guide that makes it easy to check whether the direction of the blade edge is along the cutting line during the drilling operation.

  The soft thin material cutter as described above can be used as an opening device for the face plate of the stoma device.

  According to the cutter of the present invention, even if it is a soft thin material that has viscosity and flexibility and is difficult to cut, the soft blade is pushed by the cutting blade while sandwiching the soft thin material between the upper blade and the lower blade. Therefore, it is possible to make a through hole having a desired shape very easily. In particular, the cutting blade that is curved is gradually pressed inward by the reaction force of the soft thin material at the time of pressing, and the cutting line tends to be inward while drawing a natural curve. To do.

  In addition, by making the blade surface to be formed on the cutting blade a single-edged blade surface, the reaction force from the soft thin material is further increased, and the direction of movement of the blade tip is more naturally inward. Even with a weaker force, a smooth drilling operation can be performed.

  Further, the attachment portion of the cutting blade to the main body grip is provided to be displaced above the virtual horizontal line passing between the upper blade and the lower blade, or the main body grip is provided obliquely upward with respect to the virtual horizontal line. Therefore, it is possible to prevent the soft thin material from interfering and perform a smooth cutting or drilling operation.

  And if the spheres are extended to the cutting edges of the upper and lower blades, not only can it be prevented from accidentally hurting the hand, etc., or inadvertently damaging other objects, but also cutting or punching During the opening operation, the upper blade sphere functions as a guide for the cutting line, but the presence of the lower blade sphere does not damage other things such as the stoma bag. It is suitably used as an opening tool for drilling a through-hole having a complicated curved shape.

  Hereinafter, the soft thin material cutter according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a right side view showing an example of a soft thin material cutter according to the present invention (when the cutting edge is the front), FIG. 2 is a plan view of the cutter without a main body grip, and FIG. It is a left view except the main body grip in a cutter. The cutter 1 shown in these figures has an upper blade 2 and a lower blade 3 which are continuous at each base end side (right side position in FIG. 1) and open forward (left side direction in FIG. 1) in a V shape in a side view. A cutting blade 4 having a shape is provided, and the vertical distance from the upper edge of the upper blade 2 to the lower edge of the lower blade 3 is set to about 7 mm so that it can be suitably used as a stoma punch. It is supposed to be.

  In the cutting blade 4, spheres 6a and 6b are extended at both cutting edges of the upper blade 2 and the lower blade 3, and the lower blade 3 is longer forward than the upper blade 2, but this is a cutting operation. This is intended for the purpose of sliding the sphere 6b extending to the cutting edge of the lower blade 3 on the underlay surface of a desk or the like, and denies that the upper blade 2 and the lower blade 3 have the same length. is not. However, when the lower blade 3 is longer forward than the upper blade 2, the cutting line is hidden by the shadow of the upper blade 2, and there is a demerit that it is difficult to view from above. The spheres 6a and 6b are back-bonded with small spheres made of vinyl acetate in consideration of ease of processing.

  In the cutter 1 of this example, the cutting blade 4 is curved in the counterclockwise direction (left side direction) in plan view toward the pressing direction (the direction of arrow A in FIG. 2). For example, the opening diameter in the case of a digestive tract stoma is about 20 to 50 mm, and the opening diameter in the case of a urinary tract stoma is about 15 to 30 mm. Therefore, the curvature of the cutting blade 4 in this example is set to a radius of 25 mm. is doing.

  As shown in the phantom line in FIG. 2 and FIG. 3, the cutter 1 of this example forms a blade surface 5 with a cutting angle of about 10 degrees outside the curved cutting blade 4, and this is called “Shinogi”. Surface ". A broken line connecting the point X and the point Y in FIG. 3 is a virtual horizontal line passing through the middle of the upper blade 2 and the lower blade 3, that is, the deepest valley portion, and the horizontal width of the portion of the cutting blade 4 through which the virtual horizontal line passes. By setting it short, the occurrence of friction with a soft thin material during cutting is suppressed.

  And the attachment part 7 from the cutting blade 4 to the main body grip 8 (refer FIG. 1) is provided with the front-end | tip part 7a located in the cutting blade 4 side displaced above the said virtual horizontal line. That is, by extending the attachment portion 7 to the main body grip 8 obliquely upward from the upper edge of the base end of the upper blade 2, the horizontal width of the portion of the cutting blade 4 through which the virtual horizontal line passes is set as described above. It became possible.

  As shown in FIG. 1, the body grip 8 is extended to the root portion 7 b of the attachment portion 7, but the root portion 7 b is positioned higher than the tip portion 7 a of the attachment portion 7. In other words, after setting the line connecting the tip portion 7a and the root portion 7b to be obliquely upward with respect to the virtual horizontal line, the main body grip 8 is extended to the root portion 7b. The main body grip 8 is not limited to the shape shown in FIG. 1 as long as the user's operation feeling is taken into consideration, and various materials can be adopted. For example, an adapter that can be pressed with a palm can be attached to the main body grip 8 in order to cope with a user who has a problem in opening / closing of a finger or the like.

  4 and 5 are views showing a state in which the soft thin material is cut using the soft thin material cutter according to the present invention formed as described above, and FIG. 4 is a side view of FIG. Indicates a plan view. When the lower blade 3 of the cutting blade 4 is inserted into the soft thin material 9 and the main body grip 8 is pressed forward, the soft thin material 9 is gradually cut between the upper blade 2 and the lower blade 3 of the cutting blade 4. Become. As shown in FIG. 4, as a result of the displacement of the mounting portion 7, the contact portion between the soft thin material 9 and the cutting blade 4 is extremely short, so even a viscous soft thin material 9 has a small pressing force. Smooth cutting can be realized. In addition, since the main body grip 8 does not contact the soft thin material 9 during the cutting operation, excellent operability can be obtained.

  And as FIG. 5 shows, the spherical body 6a provided in the front-end | tip of the upper blade 2 functions as a guide which shows a cutting | disconnection direction during a cutting | disconnection operation | work.

It is the right view which showed an example of the cutter for soft thin materials which concerns on this invention. It is a top view except the main body grip in the cutter of the example of FIG. It is a left view which excluded the main body grip in the cutter of the example of FIG. It is a figure which shows the state which has cut | disconnected the soft thin material using the soft thin material cutter which concerns on this invention, and has shown the place seen from the side surface. It is a figure which shows the state which has cut | disconnected the soft thin material using the soft thin material cutter which concerns on this invention, and has shown the place seen from the plane.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutter 2 Upper blade 3 Lower blade 4 Cutting blade 5 Blade surface 6a, 6b Spherical body 7 Attaching part 8 Body grip 9 Soft thin material

Claims (6)

The upper blade and the lower blade are provided with a V-shaped or U-shaped cutting blade in which the base blades are continuously opened at the respective base ends, and the cutting blade is curved and formed in either one of the left and right directions in plan view. Thin material cutter. 2. The cutter for soft thin material according to claim 1, wherein the curved cutting blade is formed with a single-edged blade surface on the inside. The cutter for a soft thin material according to claim 1, wherein an attachment portion of the cutting blade to the main body grip is displaced upward from an imaginary horizontal line passing between the upper blade and the lower blade. The soft thin material cutter according to any one of claims 1 to 3, wherein a main body grip is extended obliquely upward with respect to a virtual horizontal line passing through the middle of the upper blade and the lower blade of the cutting blade. The soft thin material cutter according to any one of claims 1 to 4, wherein a sphere is extended to both edges of the upper blade and the lower blade. The soft thin material cutter according to any one of claims 1 to 5, wherein the soft thin material is a face plate of a stoma device and is used as an opening device for the face plate.

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