JP2018015305A - Cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting tool of a simple structure capable of easily and quickly replacing a cutting blade, and without causing falling-off and dislocation of the cutting blade.SOLUTION: In a cutting tool having a body 2 having two planar parts 4a and 4b for mutually forming a groove part substantially vertically and a cutting blade 3 of projecting an edge between these planar parts and capable of cutting an object along this side by slidably moving while applying the two planar parts 4a and 4b by straddling one side of the object, the body 2 is opened-closed, and the cutting blade 3 is fitted to and held by a seeing or hidden surface by this opening-closing in a state of outwardly projecting the tip side more than the middle of the two sides of a tapering-off part, and a holding recessed part 6 of including the substantially same shape as an external shape of a holding object part of the cutting blade 3 is provided, and a use attitude of making the cutting blade 3 undetachable and a replacement attitude of making the cutting blade 3 detachable, can be changed by opening-closing of the body 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cutting tool that can cut an object such as a box along a side, and more particularly, a simple tool that facilitates replacement of a cutting blade and prevents the cutting blade from being dropped or displaced during use. The present invention relates to a cutting tool having a simple structure.

Conventionally, as a box cutter that cuts along the ridgeline of a corrugated cardboard or paper box, a main body having a V groove whose cross section is substantially perpendicular to one side parallel to the longitudinal direction, and a cutter protruding from the groove bottom of the V groove, There is a box cutter formed such that the blade portion of the cutter and the groove bottom form an acute angle (see Patent Document 1).
This box cutter clamps the cutter between the two halved members and tightens the two halved members with a fastener such as a screw to fix the cutter in a predetermined position. Can be attached at an angle.

However, in the one described in Patent Document 1, when replacing the cutter, after removing the fastener such as the screw, disassembling the two halved members and removing the cutter, a new cutter is mounted and the screw is removed. In this case, since the two halved members are fixed to each other, a tool such as a screwdriver for tightening the screw is necessary, and it cannot be performed quickly.
In addition, if a fastener such as a screw is loosened by continuing use, the cutter may fall off or be displaced, and the user may be injured unexpectedly.

JP-A-10-118978

  The present invention intends to solve in view of the above-mentioned situation, and provides a cutting tool having a simple structure in which the cutting blade can be replaced easily and quickly, and the cutting blade is not dropped or displaced. In the point.

  In order to solve the above-mentioned problem, the cutting tool according to the present invention has a main body having two planar portions that are substantially perpendicular to each other to form a groove portion, and a tip that protrudes between these planar portions. A cutting tool capable of cutting the object along this side by sliding and moving the two planar parts across one side of the object, the main body comprising: The cutting blade to be held is fitted and held on a surface that opens and closes and is visible and hidden by the opening and closing, with the tip side projecting outward from the middle of the two sides of the tip. By using a holding recess that has substantially the same shape as the outer shape of the part, the use posture in which the cutting blade cannot be detached and the replacement posture in which the cutting blade can be detached are changed by opening and closing the main body. It is possible.

In addition, the holding recess may be formed on one surface that appears when the main body is opened with a depth substantially the same as the thickness of the cutting blade.

  Further, the holding recess may be formed by forming two or more different shapes on one surface or both surfaces which are exposed by opening the main body.

Furthermore, an adhesive sheet may be provided in the holding recess.

Further, a safety cover that covers the cutting blade may be provided, and the safety cover may be a lock member that cannot change the posture of the main body when in use.

Further, the cutting tool main body includes two planar portions that are substantially perpendicular to each other and that form a groove portion, and a holding portion that holds the cutting blade so that the cutting edge protrudes between the planar portions. In addition, the cutting blade is formed in a state where the tip side protrudes outward from the middle of two non-parallel sides forming a tapered portion of the cutting blade on a surface that is openable and closable and that is visible and hidden by opening and closing. A holding recess for fitting and holding may be provided.

According to the cutting tool according to the present invention, the holding recess fits the cutting blade including a part of the tip in a state where the tip side protrudes outward from the middle of the two sides forming the tip of the cutting blade. Therefore, in a use posture in which the main body is closed, the cutting blade does not fall off or shift and can be used safely. Further, since the use posture and the replacement posture can be changed by opening and closing the main body, the cutting blade can be easily and quickly replaced.

Further, according to the holding recess formed on the one surface that appears when the main body is opened with a depth substantially the same as the thickness of the cutting blade, the position where the cutting blade is fitted is determined. Easy to replace. In addition, the strength of the peripheral edge that holds the cutting blade of the holding recess can be increased, and the durability can be improved.

Further, if the holding recess is formed by forming two or more different shapes on one surface or both surfaces which are revealed by opening the main body, the object to be cut protrudes outward from the cutting blade. The length of the portion to be cut and the type of the cutting blade can be selected, and cutting according to the purpose can be performed.

Furthermore, if the holding recess is provided with an adhesive sheet, it can be used more safely by securing the cutting blade more reliably. In addition, when replacing the cutting blade, the cutting blade can be temporarily fixed with this adhesive sheet, and the replacement work becomes easier.

In addition, if a safety cover that covers the cutting blade is provided and the safety cover is a lock member that makes the main body unchangeable in use, the safety when not in use is improved. Safety can be further improved.

It is a perspective view which shows the structure of the cutting tool which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which similarly shows the structure of a cutting tool. It is a disassembled perspective view which shows the state which similarly removed the cutting blade of the cutting tool. It is an expansion perspective view which similarly shows an example of the usage method of a cutting tool. It is a perspective view which similarly shows an example of the usage method of a cutting tool. It is a perspective view which shows the state which similarly provided the cover in the cutting tool. It is a perspective view which shows another state which similarly provided the cover in the cutting tool.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all embodiments that satisfy the requirements described in the claims. .

An embodiment of a cutting tool 1 according to the present invention will be described with reference to FIGS. 1 to 5.
As shown in FIGS. 1 to 3, the cutting tool 1 includes, for example, a main body 2 having two planar portions 4 a and 4 b that are substantially perpendicular to each other and form a groove portion, and a cutting edge between these planar portions. A cutting blade 3 that protrudes, and by sliding the two planar portions 4a and 4b across one side of the object, the object can be cut along this side, A cutting blade 3 that opens and closes the main body 2 and holds and holds the cutting blade 3 on a surface that is visible and hidden by the opening and closing with the tip side protruding outward from the middle of the two sides of the tapered portion. By providing the holding recess 6 having substantially the same shape as the outer shape of the held portion, the main body 2 has a use posture in which the cutting blade 3 cannot be attached and detached and a replacement posture in which the cutting blade 3 can be attached and detached. It can be changed by opening and closing.

Here, the term “substantially perpendicular to each other” means that one surface is substantially perpendicular to the other surface, and the term “substantially perpendicular” refers to an angle close to vertical and at least 80 to 110 degrees. An angle including a range of a degree shall be said. In addition, opening and closing refers to a movement that is opened so that a portion that cannot be seen from the outside can be seen, and the opposite movement, for example, one of two members that are combined so that at least a part of each of them touches each other. And the like that rotate with respect to the other so that the surface to be opened is opened, and those that combine two members are included. The phrase “including substantially the same shape” means that a part that protrudes outward is included but the other part is substantially the same as this shape.

  The main body 2 is formed by assembling two members 2 a and 2 b of a quadrangular prism having a substantially trapezoidal planar shape by a hinge 8 so as to be opened and closed. Since the holding recesses 6 for mounting the cutting blade 3 are provided on the inner side surfaces 5a and 5b that are visible and hidden from the outside by opening and closing these members 2a and 2b, the cutting blade is opened by opening the main body 2. 3 can be replaced. One inner side surface 5a is formed in a flat planar shape, while the other inner side surface 5b is formed with a first holding recess 6 for holding the cutting blade 3 on a part of the plane. .

  The 1st holding | maintenance recessed part 6 becomes a shape which fits the cutting blade 3 so that the front end side may protrude outside rather than the middle of a taper. The first holding concave portion 6 has a concave shape in which a portion excluding the protruding side of the cutting blade 3 is stepped down, and this step portion holds the cutting blade 3 and prevents the cutting blade 3 from being displaced. ing. In particular, the two tip side steps 6a and 6b that hold the tip of the cutting blade 3 have a shape corresponding to the tip of the cutting blade 3, so that the cutting blade 3 is prevented from moving in the protruding direction. As a result, the cutting blade 3 does not fall off.

Further, a second holding recess 7 is also provided on the inner side surface 5b. The second holding recess 7 has a shape close to the first holding recess 6 and a line-symmetric shape at the center in the longitudinal direction, and is shifted further inward (on the hinge 8 side) than the first holding recess 6. It has been formed. For this reason, the second holding recess 7 holds the cutting blade 3 inward than the first holding recess 6, and the cutting blade 3 held in the second holding recess 7 is Compared with the case where the first holding recess 6 holds the portion, the portion projecting outward becomes shorter and the depth of cutting into the object to be cut becomes shallower.
Here, the second holding recess 7 is formed to have a cutting depth different from that of the first holding recess 6. In addition, the second holding recess 7 can hold cutting blades having different shapes, Because it is possible to use a new tip for cutting by folding and shortening part of the blade edge side when it becomes difficult to cut by use, it is possible to respond to changes in the length of the cutting blade It may be possible. Like the first holding recess 6, the second holding recess 7 has two tip side stepped portions 7 a and 7 b, so that the cutting blade 3 can be prevented from falling off.
In addition, the second holding recess 7 may be formed on the same surface as the first holding recess 6 as shown in the figure, but by forming it on a different surface from the first holding recess 6, The sliding direction may be one direction.

  As described above, the inner surfaces 5a and 5b of the main body 2 are such that all surfaces except the first holding recess 6 and the second holding recess 7 are in contact with the other surface in the use posture. The strength is high, but the shape is not limited to such a shape, and any shape that exhibits the function of holding the cutting blade 3 in a use posture may be used. It may be one that does not touch.

Moreover, since these holding recesses 6 and 7 have a depth dimension substantially the same as the thickness dimension of the cutting blade 3, the main body 3 can sandwich and hold the cutting blade 3 in the use posture. ing. If the depth dimensions of the holding recesses 6 and 7 are smaller than the thickness dimension of the cutting blade 3, a gap is generated between the holding recesses 6 and 7 and the cutting blade 3 even in the use posture. Cause. For this reason, the depth dimension of these holding recesses 6 and 7 is preferably equal to or less than the thickness dimension of the cutting blade 3 and is formed to be slightly smaller than the thickness dimension of the cutting blade 3. If it exists, it can be said that it is more preferable because the holding recesses 6 and 7 can be held while strongly holding the cutting blade 3.

Planar portions 4a and 4b are formed on the free ends of the inner side surfaces 5a and 5b of the main body 2, and these planar portions 4a and 4b are configured to be substantially perpendicular to each other in use. ing. For this reason, as shown in FIG. 4, by making these planar portions 4a and 4b abut on a predetermined side of the box, cutting along this side can be easily performed. Here, there is no problem as long as the angle between these planar portions 4a and 4b can be along a predetermined side of the box, and therefore it can be configured in a range of about 80 to 110 degrees. However, in consideration of how the box is fitted to a predetermined side and blurring at the time of sliding movement on this side, it is more preferably about 95 degrees.

  Further, the rear side surface in the sliding direction when the main body 2 is cut is formed by a plane perpendicular to the sliding direction at the time of cutting. For this reason, when sliding is performed at the time of cutting, the user can use it by placing a finger on the rear side. Further, since the front side surface is formed in the same manner as the rear side surface, when the cutting blade 3 is attached to the second holding recess 7, the front side surface is cut by sliding the front side surface with a finger placed It is easy to apply a force in the direction, and the cutting operation can be performed smoothly.

Here, the opening method of the general cardboard box B using the cutting tool 1 is demonstrated along FIG.4 and FIG.5.

First, as shown in FIG. 4, the two planar portions 4 a and 4 b are brought into contact with a predetermined side of the cardboard box B. At this time, the cutting blade 3 hits the cardboard box B. However, since only the cutting edge of the cutting blade 3 hits the cardboard box B, the cutting edge can be easily inserted into the cardboard box B by applying light force. Can do. Next, the cutting tool 1 is slid along the side of the cardboard box B so that the two planar parts 4a and 4b are not separated from the cardboard box B with the tip of the cutting blade 3 stuck in the cardboard box B. By doing so, this side can be cut with the cutting blade 3.
Next, as shown in FIG. 5, the upper surface of the cardboard box B can be separated by cutting the sides around the upper surface of the cardboard box B.
In order to open the cardboard box B, it is not always necessary to cut all sides because the top surface can be opened like a lid by cutting three sides around the top surface.

In FIG. 6, the cutting tool 1 provided with the cover 9 is shown. Since this cover 9 can be attached to the cutting tool 1 when not in use so as to cover the cutting blade 3 and the planar portions 4a and 4b, the safety when not in use can be improved.
Moreover, since this cover 9 can be attached to the opposite surface of the cutting blade 3 of the cutting tool 1 at the time of use, by attaching it to the cutting tool 1 at the time of use, there is no fear of loss, Moreover, since the main body 2 is fixed so as not to be opened by the cover 9, the safety during use can be further improved.
Although this cover 9 is detachable from the main body 2 and has a simple configuration, it is easy to handle. However, the cover is not limited to such a configuration, for example, The main body 2 may be provided so as to be rotatable, and may exhibit protection of the cutting blade 3 when not in use and inability to open the main body 2 when in use by rotation.

In the present embodiment, a blade of a general cutter is used as the cutting blade 3, but the blade is not limited to this, and may be a blade used in other flat plate-like materials or other tools. May be a three-dimensional shape like a cone. Also, the planar portions 4a and 4b may be formed in a curved shape in addition to the plane as shown in the figure, and these surfaces are provided with protrusions or ridges. Also good. Furthermore, as a material for the main body, the hinge, and the cover, various materials can be appropriately selected, and each configuration is not limited to this embodiment. For example, the main body and the cover are integrated. It is good also as what was comprised as. Furthermore, the main body and the cover may be provided with a storage unit for storing a spare cutting blade or a used cutting blade.

DESCRIPTION OF SYMBOLS 1 Cutting tool 2 Main body 2a, 2b Main body member 3 Cutting blade 4a, 4b Planar part 5a, 5b Inner side surface 6 1st holding | maintenance recessed part 6a, 6b Tip side step part 7 Second holding recessed part 7a, 7b Tip side step Part 8 Hinge 9 Cover B Cardboard box

Claims (6)

A main body having two planar portions that are substantially perpendicular to each other and forming a groove portion, and a cutting blade having a tapered shape in which a cutting edge protrudes between these planar portions, and targets the two planar portions It is a cutting tool that can cut an object along this side by sliding it while striding across one side of the object,
The cutting blade, which opens and closes the main body, and holds and holds the cutting blade on a surface that is visible and hidden by the opening and closing in a state where the tip side protrudes outward from the middle of the two sides of the tapered portion. By providing a holding recess that includes substantially the same shape as the outer shape of the held portion, a use posture that makes the cutting blade non-detachable and a replacement posture that makes the cutting blade attachable / detachable can be obtained. A cutting tool that can be changed by opening and closing. 2. The cutting tool according to claim 1, wherein the holding recess is formed on one surface appearing by opening the main body with a depth substantially the same as the thickness of the cutting blade. The cutting tool according to claim 1 or 2, wherein two or more of the holding recesses having different shapes are formed on one surface or both surfaces which are exposed by opening the main body. The cutting tool according to any one of claims 1 to 3, wherein an adhesive sheet is provided in the holding recess. The cutting tool according to any one of claims 1 to 4, wherein a safety cover that covers the cutting blade is provided, and the safety cover serves as a lock member that cannot change the posture of the main body when in use. A cutting tool main body comprising two planar portions that are substantially perpendicular to each other to form a groove portion, and a holding portion for holding the cutting blade so that the blade tip protrudes between these planar portions,
Fits the cutting blade in a state that the tip side protrudes outward from the middle of two non-parallel sides that forms the tapered portion of the cutting blade on the surface that can be opened and closed and that is visible and hidden by opening and closing A cutting tool main body provided with a holding recess for holding.

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