JP2008231880A - Cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly safe cutter capable of maintaining the cutting quality without damaging a cutting blade. <P>SOLUTION: This cutter 1 has a gripping part 2 gripped and held by fingers, and a head part 3 arranged in a tip part of this gripping part and provided with the cutting blade 7, and cuts a cutting object such as an extension part of a net tensioned in a frame body. The head part has a guide part 4 having a sliding part, a cutting object introducing groove 5 formed in the sliding direction from a front end part of the head part, and an inclined groove 6 slantingly formed in the sliding direction from the innermost part of the cutting object introducing groove. The cutting blade is constituted by arranging a cutting edge part along the inclined groove in the cutting object introducing groove or the inclined groove. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cutting tool. Specifically, the present invention relates to a cutting tool for cutting a cloth-like or sheet-like workpiece. More specifically, the present invention relates to a cutting tool suitable for cutting a screen door net.

  The net replacement work of the screen door is carried by placing a net cut slightly larger than the screen door frame on the frame body, and pressing the rubber together with the net into the fitting groove of the frame body to put the net into the frame body. This is done by fixing.

  After the net is stretched on the frame, the portion of the net that extends from the frame is cut out using a cutting tool such as a cutter knife.

  The cutting operation is performed by moving a cutter knife or the like along the edge of the fitting groove and cutting the net while pulling an excess net extending from the fitting groove. However, it is difficult to move the cutter knife along the fitting groove, and considerable skill is required. Further, when the cutter knife slides out of the fitting groove, the stretched net and the pressing rubber are often damaged, and the fingers are often injured.

In order to solve the above problems, various net cutting tools have been devised.
JP 2006-104908 A

  The insect screen cutting tool described in Patent Document 1 includes an engaging member that engages with a frame surface, and a guide opening that guides the insect screen and is provided with a blade at the back.

  The insect screen cutting tool is configured to guide the insect screen into the guide opening by moving the engagement member along the frame, and to cut the insect screen with the blade provided at the back of the opening. Yes.

  The screen door net is held so that the edge protrudes from the frame. For this reason, unless it cut | disconnects according to the surface of a frame, it looks bad. The screen door net is formed by weaving resin filaments in a lattice shape. For this reason, the net is cut so as to cut filaments arranged in a direction perpendicular to the cutting edge of the blade.

  That is, since the cutting mode is an intermittent cutting mode similar to the small-cutting of wood with a scissors, the cutting edge is easily damaged. In addition, if the cutting edge is not sharp enough, the filament perpendicular to the cutting edge is not easily cut, and the filament is cut in such a manner as to be peeled off, so that the appearance of the cut edge is deteriorated. Furthermore, it may cause slack of the stretched net. The above phenomenon also occurs when an edge of a fabric or the like is cut.

  In the insect net cutting tool described in Patent Document 1, the guide opening is formed in a linear groove shape in the moving direction of the cutting tool, and is formed with a minimum cut width that allows the insect net to pass therethrough. Has been. For this reason, the insect repellent net is cut by a cutting edge portion in a very limited range, which is arranged with the same width as the opening width. For this reason, the above-mentioned blade is very easily damaged.

  In the insect screen cutting tool, the blade is provided so as to be inclined with respect to the moving direction, and the apparent cutting edge angle is reduced accordingly. However, since the width of the guide opening is formed only with a width that allows the insect screen to pass through, the insect screen cannot move along the cutting edge. Therefore, the effect of reducing the edge angle due to so-called cutting cannot be expected. Moreover, since the plate-shaped blade is set parallel to the cutting surface of the net, the filament of the net is loosened during cutting, and an excessive force acts on the cutting blade, and damage is likely to occur. For this reason, the case where a stable cutting operation cannot be performed occurs. Also, the problem that the cutting lines are not aligned is likely to occur.

  Further, the blade is provided on the outer surface of the engagement member that is slid along the screen door frame surface. For this reason, a user's finger is easy to touch the said cutter, and it is dangerous.

  This invention solves the above-mentioned problem, and it makes it a subject to provide the cutting tool with which a sharpness is maintained since a cutter is hard to be damaged and high safety | security.

  The invention of the present application is a cutting tool comprising a gripping part gripped with fingers and a head provided at a tip part of the gripping part and provided with a cutting blade, wherein the head includes a sliding part. And a guide introduction groove formed along the sliding direction from the front end portion of the head, and formed to be inclined in the sliding direction from the back of the cut object introduction groove. The cutting blade includes an inclined groove, and the cutting blade is configured such that the cutting blade portion is disposed along the inclined groove in the workpiece introduction groove or the inclined groove.

  The object of the present invention is to cut off the edge of a canvas used in a screen door net or a picture in a good-looking manner in accordance with a frame or the like.

  By providing the grip portion, it can be easily operated with one hand. The shape of the gripping part is not particularly limited, but in the case of a screen door cutting tool, the gripping part is configured to stand up diagonally rearward from the net tensioning surface of the frame, so that the fingers are placed on the stretched net surface. The work can be performed without touching them.

  The said guide part can employ | adopt the thing of a various form. In the present invention, it is also possible to guide the head using a workpiece introduced into the workpiece introduction groove. Further, as in the invention described in claim 3, a flat guide surface that can be slid along the outer surface of the frame body can be provided on the bottom surface of the head. Also, a sliding portion that can be slid against a separately provided ruler or the like can be provided.

  The to-be-cut object introduction groove and the inclined groove provided in the head are provided in series and are formed through the head in a direction in which the to-be-cut object to be cut rises. The workpiece introduction groove is formed along the sliding direction so as to guide the workpiece to the cutting blade, that is, guide the workpiece from the front. The width of the workpiece introduction groove is not particularly limited, and may be formed to a width that allows the workpiece to pass smoothly.

  In the present invention, the inclined groove is formed to be inclined with respect to the sliding direction, that is, the forming direction of the workpiece introduction groove from the inner part of the workpiece introduction groove. And the cutting blade of the said cutting blade is provided so that the said inclined groove | channel may be followed. By adopting the above configuration, the workpiece is brought into contact with the cutting blade at the back of the workpiece introduction groove, and the direction of the cutting blade is changed while the direction is changed along the inclined groove. Cutting is performed by the action of the cutting edge. That is, in this invention, it becomes possible to cut | disconnect by making the cutting-blade part for the length of the said inclined groove act on the said to-be-cut | disconnected object. For this reason, it is hard to damage a cutting blade compared with the conventional cutting tool, and it becomes possible to maintain a sharpness. And the resistance which arises when the said to-be-cut object transfers, turning from the to-be-cut object introduction groove | channel to the said inclined groove | channel can be made to act as pressing force with respect to the said cutting-blade part. For this reason, sharpness can be improved more.

  In addition, since the workpiece is cut while being moved along the cutting edge portion in the inclined groove, the substantial cutting edge angle of the cutting blade is reduced by the principle of the drawing, and the sharpness is remarkably sharp. To improve.

  The invention described in claim 2 of the present application is a net-cutting tool for a screen door that cuts an extended portion of a net stretched on the frame, and the head is slid along the frame. A guide portion; a net introduction groove formed along the sliding direction from the front end portion of the head; and an inclined groove formed inclined from the inner portion of the net introduction groove in the sliding direction. The cutting blade is disposed in the net introduction groove or the inclined groove so that the cutting edge portion is along the inclined groove.

  By providing a guide part having a sliding part that is slid along the frame body of the screen door on the head, the protruding edge of the screen door net after being attached to the frame body can be cut with good appearance.

  In the invention described in claim 4 of the present application, the head is formed in a flat shape, and the cutting blade is disposed in the workpiece introduction groove or the inclined groove in the thickness direction of the head. It is provided in the middle part.

  By forming the head in a flat shape, the frictional resistance between the introduction groove or inclined groove and the workpiece moving in these grooves is reduced, and the workpiece cut from the head is smoothly discharged. be able to.

  In addition, by providing the cutting blade in the middle portion in the thickness direction of the head, the user's fingers do not touch the cutting blade, and the safety is significantly improved.

  According to a fifth aspect of the present invention, the inclined groove and the cutting blade portion of the cutting blade are set at an angle of 30 ° to 50 ° with respect to the introduction direction of the workpiece.

  By setting the angle, the workpiece introduced into the inclined groove can be smoothly cut by acting on the cutting blade while changing the direction.

  When the angle is 30 ° or less, the pressing force against the cutting edge becomes small, and there are cases where sufficient cutting cannot be performed. On the other hand, when the angle is set to 50 ° or more, the resistance for moving the workpiece along the cutting edge increases, and a large force is required to perform the cutting operation.

  According to a sixth aspect of the present invention, the cutting blade is disposed at an angle of 2 ° to 8 ° with respect to the guide surface.

  In a tool such as a scissors, a cutting angle is set with respect to the cut surface. The cutting angle is an angle obtained by summing the clearance angle of the blade surface with respect to the cutting surface and the cutting edge angle of the cutting edge. By providing the cutting blade in an inclined manner, the cutting angle can be increased and the clearance angle of the cutting blade itself can be provided. Generally, increasing the cutting angle increases the cutting resistance but increases the durability of the cutting edge. On the other hand, by setting the clearance angle, it is possible to prevent the cut material from coming into contact with the blade surface other than the cutting edge portion, so that an effect of reducing the cutting resistance can be expected.

  The cutting blade is preferably provided with an inclination of 2 ° to 8 ° with respect to the guide surface, that is, the plane including the cutting surface of the workpiece. If the tilt angle is 2 ° or less, the above effect cannot be expected. If the angle is 8 ° or more, the cutting resistance becomes too large. In addition, the said angle is an angle of a plate-shaped cutting blade main body. The blade edge angle (the angle at which the blade edge top portion is sandwiched) may be set depending on the material of the cutting blade to be employed, and is preferably set in the range of 8 ° to 15 °.

  Further, when the angle is provided, the cutting edge of the cutting blade can be held close to the guide surface. Thereby, the height which the edge of the to-be-cut object after a cutting | disconnection protrudes from a frame etc. can be made small. By setting the angle, it is possible to bring the guide surface close to about 0.5 mm. In addition, a force can be applied in the direction of pulling the object to be cut during cutting. For this reason, slack does not occur in the object to be cut during cutting, and the cutting operation can be performed smoothly. Moreover, since the cutting lines of the workpieces are aligned, the appearance after cutting is improved.

  According to a seventh aspect of the present invention, the gripping portion is provided with a pressing portion that can press the head toward the frame.

  By providing the pressing portion, it is possible to easily perform an operation of sliding the cutting tool while pressing the head of the cutting tool along the surface of the screen frame. Therefore, the cutting operation can be performed without requiring skill.

  In the invention described in claim 8, the head is detachably provided on the gripping portion. By splitting the head and the gripping part so as to be detachable, the mold can be simplified, and even when a gripping part that is large and easy to grip is provided, packing and the like can be made small. . Therefore, the molding cost, packing cost, and delivery cost can be reduced. Moreover, in this invention, since it uses so that a head may be pressed and moved to one direction, a complicated attachment / detachment structure is unnecessary. Therefore, various attachment / detachment structures can be employed. For example, it is possible to employ a structure in which a fitting groove is provided in the head, while a protrusion that is detachably fitted in the fitting groove is provided in the gripping portion.

  According to the present invention, it is possible to configure a cutting tool that is sharp and highly safe.

  Embodiments of the present invention will be specifically described below with reference to the drawings. In this embodiment, the present invention is applied to a net cutting tool for screen doors.

  As shown in FIG. 1, a screen door net cutting tool 1 according to the present embodiment includes a gripping portion 2 that can be gripped with fingers, and a head 3 provided at the tip of the gripping portion 2. It is configured. The grip portion 2 and the head portion 3 are formed from a resin molded body.

  As shown in FIGS. 2 and 4, the head 3 has a flat shape, a net introduction groove 5 and an inclined groove 6 continuous to the net introduction groove 5 are formed. A cutting blade 7 is provided along the inner part of the net introduction groove 5 or along the inclined groove 6. The net introduction groove 5 is formed so as to open at the tip of the head 3 and is configured so that the net can be introduced into the groove from the front.

  The grip portion 2 is provided with a pressing portion 6 that can press the head 3 toward a frame body on which a screen door is stretched. The pressing portion 6 is configured so that a thumb that grips the gripping portion 6 can be placed thereon, and is configured so that the net cutting tool 1 can be easily operated.

  As shown in FIG. 2, a guide portion 4 is formed on the bottom surface of the head 3 to be brought into contact with the screen body frame surface. In the present embodiment, the guide portion 4 is formed as a flat guide surface.

  As shown in FIG.5 and FIG.6, in this embodiment, the said grip part 2 and the said head 3 are shape | molded separately, and are comprised so that attachment or detachment is possible. A dovetail groove 9 that opens rearward and upward is formed at the rear part of the head 3, while a fitting section 8 having a rectangular cross section that fits into the dovetail groove 9 is formed at the tip of the grip portion 2. Has been. The fitting portion 8 is configured to be able to fit into the dovetail groove 9 from the rear of the head 3. By adopting the above configuration, the molding die can be simplified, and the head 3 and the gripping portion 2 can be separated even when the gripping portion 6 is set to a large size that is easy to grip. Thus, packing and the like can be performed, and packing costs and delivery costs can be reduced.

  As shown in FIG. 7, the net introduction groove 5 is formed along the sliding direction F from the tip of the head 3, that is, along the cutting direction of the net. The net introduction groove 5 has a width sufficient to allow the net to pass therethrough, and is formed so as to open in the front and vertical directions of the head 3. An inclined groove 6 is formed obliquely from the inner part of the net introduction groove 5. In the present embodiment, the angle α with respect to the sliding direction F of the inclined groove 6 is set to about 40 °.

  The upper edge of the net introduction groove 5 and the inclined groove 6 is provided with a chamfered rounded portion having a large curvature radius so that the net can be smoothly introduced and the cut net can be smoothly discharged.

  As shown in FIG. 8, a cutting blade 7 is provided along the inclined groove 6. The cutting blade 7 is embedded and fixed in the head 3 so that the cutting blade portion 7a protrudes forward from the rear surface of the inclined groove 6. Further, the cutting blade 7 is provided with an inclination of β with respect to the flat surface of the guide portion 4. In this embodiment, it is set to about 3 °.

  That is, as shown in FIGS. 7 and 8, the cutting blade 7 is provided with an inclination of α ° = about 40 ° with respect to the net cutting direction, and β ° in the side view with respect to the guide portion 4. = Inclined by about 4 °. The α can be set in a range of 30 ° to 50 °. The β can be set in the range of 2 ° to 8 °.

9 and 10 show a state where the net is cut by the net cutting tool 1.

  As shown in these figures, the netting work of the screen door is carried out by placing a net 10 cut slightly larger than the screen door frame 12 on the frame 12 and fitting it on the inner edge of the frame 12. By pressing the pressing rubber 13 together with the net 10 into the mating groove 14, the net 10 is stretched on the frame body 12. An extra portion of the net 10 protrudes from the fitting groove 14, and the protruding portion is cut out by the net cutting tool 1 according to the present embodiment.

  As shown in FIG. 10, the flat surface-shaped guide portion 4 formed at the bottom of the net cutting tool 1 according to the present embodiment is brought into contact with the frame body surface 12a outside the fitting groove 14, and the net is introduced. The edge of the extended portion of the net 10 is introduced into the groove 5 and is slid in the direction of arrow F so that the head 3 is guided to the frame surface 12a.

  The net 10 enters the net introduction groove 5 and is guided to the cutting blade 7 provided at the innermost part of the net introduction groove 5. When the net 10 comes into contact with the cutting blade 7, the net 10 is cut by the cutting blade 7 a of the cutting blade 7 while being bent in the direction of the inclined groove 6.

  In this embodiment, the net 10 guided into the inclined groove 6 is cut while moving along the cutting edge. For this reason, it can cut by acting the cutting blade for the length of the above-mentioned inclined groove 6. Therefore, the edge angle is substantially reduced and the sharpness is remarkably improved. Moreover, since it can cut | disconnect with the cutting blade of a long dimension, a cutting blade is hard to be damaged and can maintain a sharpness.

  Moreover, as shown in FIG. 8, the cutting blade 7 is arranged in the middle portion of the head 3 so as to project the cutting blade portion 7 a from the rear surface of the inclined groove 6. Fingers do not touch the cutting blade. For this reason, there is no injury at the cutting edge portion 7a, and the safety is very high.

  Further, in the present embodiment, the cutting blade 7 is provided with an inclination of β = 3 ° with respect to the flat surface of the guide portion. Thereby, durability of a blade edge | tip can be improved, without increasing cutting resistance too much. Further, by setting the angle, the blade edge portion 7a can be held close to the guide surface. That is, it becomes possible to set H shown in FIG. 8 small while reliably holding the cutting blade 7a. In the present embodiment, the H can be set to about 0.5 mm. Thereby, it becomes possible to cut | disconnect the net | network 10 in the position close | similar to the frame 12, and it can improve the appearance of a screen door. Further, by setting the angle, each filament of the net 10 can be cut while applying a force pulling upward to the cutting blade 7, so that the cutting height of the filament to be cut is aligned, The cutting line of the net can be nicely arranged.

  The present invention is not limited to the embodiment described above. In the embodiment described above, the grip portion 2 and the head 3 are divided and formed so as to be detachable, but they can also be formed integrally.

  The dimensions of the net introduction groove and the cutting blade are examples, and can be changed as necessary.

  Moreover, although this embodiment applies this invention to the net | network cutting tool for screen doors, this invention can be applied to another to-be-cut object.

It is an external appearance perspective view of the cutting tool which concerns on this invention. It is a left view of the cutting tool shown in FIG. It is a front view of the cutting tool shown in FIG. It is a top view of the cutting tool shown in FIG. It is a side view which shows the state which isolate | separated the holding part and head of the cutting tool shown in FIG. It is sectional drawing which follows the VI-VI line in FIG. It is a principal part enlarged plan view of the cutting tool shown in FIG. It is principal part sectional drawing which follows the VIII-VIII line in FIG. It is a front view which shows the use condition of the cutting tool shown in FIG. It is a top view which shows the use condition of the cutting tool shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting tool 2 Gripping part 3 Head 4 Guide part 5 Cut object introduction groove 6 Inclined groove 7 Cutting blade

Claims (8)

A cutting tool comprising a gripping part gripped with fingers, and a head provided at the tip of the gripping part and provided with a cutting blade,
The head is
A guide portion having a sliding portion;
A workpiece introduction groove formed along the sliding direction from the front end of the head;
An inclined groove formed by inclining in the sliding direction from the depth of the workpiece introduction groove,
The cutting tool is a cutting tool in which the cutting blade portion is disposed along the inclined groove in the workpiece introduction groove or the inclined groove. A net cutting tool for a screen door for cutting an extended portion of a net stretched on a frame,
The head is
A guide portion slid along the frame,
A net introduction groove formed along the sliding direction from the front end of the head;
An inclined groove formed by inclining in the sliding direction from the back of the net introduction groove,
The said cutting blade is a cutting tool of Claim 1 arrange | positioned so that a cutting blade part may follow the said inclination groove in the said net | network introduction groove | channel thru | or the said inclination groove.   3. The head according to claim 1, wherein the head has a flat shape, and the cutting blade is provided in an intermediate portion in the thickness direction of the head in the introduction groove or the inclined groove. Cutting tool according to crab.   The cutting tool according to any one of claims 1 to 3, wherein the guide portion is a flat guide surface provided on a bottom surface of the head.   The said inclined groove and the cutting-blade part of the said cutting blade are inclined and provided in the angle of 30 degrees-50 degrees with respect to the introduction direction of a to-be-cut object. Cutting tool.   The cutting tool according to any one of claims 4 and 5, wherein the cutting blade is disposed at an angle of 2 ° to 8 ° with respect to the guide surface.   The cutting tool according to any one of claims 1 to 6, wherein the gripping part is provided with a pressing part capable of pressing the head toward the frame. The cutting tool according to any one of claims 1 to 7, wherein the head is detachably provided on the gripping portion.

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