JP2010046113A - Blade breaker for blade of snap-off blade cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade breaker 1 for easily and safely breaking a snap-off cutter blade in a required length. <P>SOLUTION: A plurality of blade breaking grooves 102d with a prescribed inclination angle to the longitudinal direction are formed at fixed pitch in a cutter blade 102, and a cutter blade insertion part 10 which permits insertion of a part of the cutter blade 102 in the longitudinal direction is formed between one side plate and the other side plate. A cutting guide part 15a is located at the distal end of the cutter blade insertion part 10 in at least one of the one side plate and the other side plate as a fulcrum when the blade is broken. The cutting guide part 15a has an inclination angle corresponding to the blade breaking grooves 102d, and the length from the terminal end 18 of the cutter blade insertion part 10 to the cutting guide part 15a is the length corresponding to the length from one end edge 102b of the cutter blade 102 to a specific blade breaking groove 102d<SB>5</SB>. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a blade folding tool for folding a folding blade type cutter blade to a required length along a blade folding groove formed in the cutter blade.

  Cutting tools such as scissors for cutting and chamfering the end faces of gypsum boards and the like in interior construction of buildings (see, for example, Patent Document 1) include a cutting blade type cutter blade for a cutter knife as its body. Some are used by folding them to the required length. As shown in FIG. 10, the folding blade type cutter blade 102 for the cutter knife 100 has a parallelogram shape on the front surface, a sharp blade 102 a is formed on one side edge in the width direction, and is predetermined in the longitudinal direction. A plurality of blade folding grooves 102d parallel to the tip edge 102b inclined at an angle are formed at a constant pitch on one side. In order to attach such a cutter blade 102 to the cutting tool, it is necessary to fold the cutter blade 102 to a required length along the blade folding groove 102d.

Conventionally, as a blade folding tool for folding a cutter blade, one disclosed in, for example, Patent Document 2 is known. However, such a blade folding tool has been used with reduced sharpness due to cutting work. This is for folding the tip portion by one pitch and discarding it, and is not suitable for the blade folding operation of the cutter blade for newly mounting on the cutting tool as described above. Therefore, for example, as shown in FIG. 10, the cutter blade 102 is set on the handle 101 of the cutter knife 100, protruded by a blade feed slider 103 by a required length, and folded using a pliers 200 or the like. There were problems with safety and workability.
JP 2004-351737 A JP 2001-314667 A

  The present invention has been made in view of the above points, and a technical problem thereof is a blade for easily and safely performing the operation of folding a folding blade type cutter blade to a required length. It is to provide a folding tool.

  As means for effectively solving the technical problem described above, a folding blade type cutter blade folding tool according to the invention of claim 1 is provided with a predetermined inclination angle with respect to the longitudinal direction between the one side plate and the other side plate. A cutter blade insertion portion is formed in which a part of a cutter blade in which a plurality of blade folding grooves forming a constant pitch are inserted can be inserted in a longitudinal direction, and the cutter blade is inserted into at least one of the one side plate and the other side plate. A cutting guide portion serving as a fulcrum when folding the blade is provided at the tip of the portion, and this cutting guide portion forms an inclination angle corresponding to the blade folding groove with respect to the insertion direction of the cutter blade, The length from the terminal portion of the cutter blade insertion portion in the cutter blade insertion direction to the cutting guide portion is the length from one end edge of the cutter blade to a specific blade folding groove in the cutter blade. It is obtained by a corresponding length with.

  According to the above configuration, a part of the cutter blade in the longitudinal direction is inserted into the cutter blade insertion portion, the blade folding groove of the cutter blade is aligned with the cutting guide portion extending substantially parallel to the blade folding groove, and the cutting guide portion is If a bending load is applied to the cutter blade as a fulcrum by an appropriate method, the cutter blade can be easily folded. Moreover, the part inserted in the cutter blade insertion part among the folded cutter blades can be safely held in the cutter blade insertion part as it is. Also, by inserting the cutter blade until one end edge of the cutter blade comes into contact with the end portion in the insertion direction of the cutter blade insertion portion, a specific blade folding groove of the cutter blade is formed on the cutting guide portion and in parallel with the cutting guide portion. Since it can position so that it may become, usability improves.

  According to a second aspect of the present invention, there is provided a folding blade type cutter blade folding tool according to the first aspect, wherein the holding means for holding the cutter blade in the cutter blade insertion portion is provided.

  If comprised in this way, the part inserted in the cutter blade insertion part among the folded cutter blades will be reliably hold | maintained in a cutter blade insertion part.

  According to a third aspect of the present invention, in the configuration of the first aspect, the cutting guide portion is formed on both the one side plate and the other side plate, and extends in opposite inclined directions. Is.

  With this configuration, it is not necessary to consider the front and back of the cutter blade when inserting the cutter blade into the cutter blade insertion portion, and the cutting guide portion formed on the one side plate and the cutting guide portion formed on the other side plate. Since either one of them is always substantially parallel to the cutting groove of the inserted cutter blade, the usability is further improved.

  According to the blade cutter for a folding blade type cutter blade according to the present invention, the folding blade type cutter blade is inserted into the cutter blade insertion portion so that the specific blade folding groove is positioned on the cutting guide portion, and the cutting guide is inserted. By simply applying a bending load to the cutter blade with a portion as a fulcrum, it can be easily and safely folded at a specific length.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a folding blade type cutter blade folding tool according to the present invention will be described below with reference to the drawings. First, FIG. 1 is a front view showing a cutter blade to be folded by a folding blade type cutter blade folding tool according to the present invention, and FIG. 2 is a first drawing of a folding blade type cutter blade folding tool according to the present invention. FIG. 3 is a rear view, FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, and FIG. 5 is a blade for a folding blade type cutter blade according to the first embodiment. FIG. 6 is a front view showing a state in which the cutter blade is inserted into the folding tool, and FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG.

  First, the cutter blade 102 shown in FIG. 1 is for the cutter knife 100 as previously described with reference to FIG. 10, and the front shape is a parallelogram, and a sharp blade 102a is formed on one side edge in the width direction. A plurality of blade folding grooves 102d that are formed and have a predetermined inclination angle θ with respect to the longitudinal direction and parallel to the base end edge 102c are formed at a constant pitch P on one side (front side). That is, the blade folding groove 102d also forms an inclination angle θ with respect to the longitudinal direction. A circular hole 102 e opened near the base end is an engagement hole that is engaged with the blade feed slider 103 of the cutter knife 100.

Cutter blades 102 of the illustrated design in FIG. 1, of the blade folding grooves 102d, the groove 102d ₅ fold fifth blade from the leading edge 102b is located at the center in the longitudinal direction of the cutter blade 102, that is, 5 pitches half the length _{L 1} of the cutter blade 102 has a _(L 1/2). The fifth blade folding groove 102d ₅ in this case corresponds to the specific blade folding groove described in claim 1.

The blade folding tool 1 shown in FIGS. 2 to 4 is formed into a flat sheath shape from a synthetic resin material, and has a pair of rail portions 11 and 12 extending parallel to each other in the width direction, and the rails. The front plates 13 and 14 and the back plates 15 to 17 alternately extending between the portions 11 and 12 on the front side and the back side are provided. As shown in FIGS. 5 and 6, the front plates 13 and 14 and the back plates 15 to 15 are provided. 17 is formed with a cutter blade insertion portion 10 into which the cutter blade 102 shown in FIG. 1 can be inserted by a half length L _1/2 . The front plates 13 and 14 correspond to one side plate in claim 1, and the back plates 15 to 17 correspond to other side plates in claim 1.

Specifically, the size S ₁ (see FIG. 2) of the cutter blade insertion portion 10 with respect to the longitudinal direction of the blade folding tool 1 is half the length L _1/2 of the cutter blade 102 shown in FIG. This corresponds to a length of 5 pitches (P × 5), and the size S ₂ of the cutter blade insertion portion 10 in the width direction of the blade folding tool 1 (see FIG. 3), that is, the inner method between the rail portions 11 and 12 is shown in FIG. 1 is slightly larger than the width W of the cutter blade 102 shown in FIG. 1, and is the size S ₃ of the cutter blade insertion portion 10 in the thickness direction of the blade folding tool 1 (see FIG. 4), that is, the extended surface of the inner surfaces of the front plates 13 and 14 And the inner surface between the extended surfaces of the inner surfaces of the back plates 15 to 17 are substantially the same as the thickness of the cutter blade 102 shown in FIG.

  The front end portion of the back plate 15 located at the front end of the cutter blade insertion portion 10 serves as a cutting guide portion 15a serving as a fulcrum when the blade is folded, which will be described later, and the end portion of the cutter blade insertion portion 10 in the cutter blade insertion direction. As shown in FIGS. 2 and 4, 18 is a stepped surface rising from the innermost back plate 17 to the front side in the cutter blade insertion direction. Further, the cutting guide portion 15a and the end portion 18 are parallel to each other, and as shown in FIG. 2, the rail portions 11 and 12 are substantially equivalent to the blade folding groove 102d of the cutter blade 102 shown in FIG. The inclination angle θ is made.

  On the back plate 17 constituting the cutter blade insertion portion 10, a spring portion 19 corresponding to the holding means described in claim 2 is formed by a pair of slits 17a, 17b. As shown in FIGS. 2 and 4, a pressure contact protrusion 19 a facing the front side, in other words, the inside of the cutter blade insertion portion 10, is formed near the tip of the spring portion 19. As shown in FIG. 6, the press contact protrusion 19 a can be pressed into contact with the cutter blade 102 inserted into the cutter blade insertion portion 10 by the elasticity of the spring portion 19.

  When the cutter blade 102 shown in FIG. 1 is folded into a half length by using the blade folding tool 1 having the above-described configuration in order to attach it to a cutting tool such as a board scissors, as shown in FIGS. In addition, the cutter blade 102 is confirmed so that the blade folding groove 102d (which may be the leading edge 102b or the base edge 102c) is parallel to the cutting guide portion 15a or the end portion 18 of the cutter blade insertion portion 10, and The leading edge 102b or the base edge 102c is used as the head, and is inserted into the cutter blade insertion portion 10 of the blade folding tool 1 from the cutting guide portion 15a side.

Then, as shown in FIG. 5, in a state where the cutter blade 102 is inserted into the blade folding tool 1 until the tip edge 102 b or the base edge 102 c abuts the terminal end 18 of the cutter blade insertion portion 10, FIG. since the groove 102d ₅ fold 5 th blade in the longitudinal center of the cutter blade 102 as shown is positioned on the cutting guide portion 15a, for example, the fifth blade folding groove 102d ₅ fold edge of the outer neighbor The cutter blade 102 can be cut along the blade folding groove 102d ₅ by holding the portion between the groove 102d ₆ with a pliers (not shown) and applying a bending load with the cutting guide portion 15a as a fulcrum. .

  One of the two cutter blades 102 folded in this way is used by being mounted on a board cage (not shown). Further, the other portion inserted into the blade folding tool 1 is pressed against the front plate 14 by the spring portion 19 via the pressure contact projection 19a and is held in the blade folding tool 1 by the frictional force. It can be safely stored as a blade. When it becomes necessary to use the blade as a replacement blade, the cutter blade 102 is pushed out from the blade folding tool 1 by the belly of the finger through the window portion between the front plates 13 and 14 or the window portion between the rear plates 15 to 17 and taken out. be able to.

  Of the folded cutter blade 102, as a holding means for holding a portion inserted into the cutter blade insertion portion 10, in addition to the spring portion 19, for example, a magnet that attracts the cutter blade 102, or a cutter by elasticity and frictional force. A rubber plate or the like that is in pressure contact with the blade 102 is also applicable.

  FIG. 7 is an explanatory view showing a method of folding a cutter blade set on a cutter knife with a folding tool for a folding blade type cutter blade according to the first embodiment, and FIG. 8 is a blade for a folding blade type cutter blade according to the first embodiment. It is explanatory drawing which shows the method of folding a cutter blade using a pair of folding tools.

Among these, in the method shown in FIG. 7, the cutter blade 102 set on the handle 101 of the cutter knife 100 is made to have a length corresponding to five pitches of the blade folding groove 102 d by the blade feed slider 103, that is, half the total length of the cutter blade 102. is protruded by a length (L _1/2), the portion is the projecting, inserted into the blade folding tool 1 of the cutter blade insertion portion 10. In this state, the fifth blade folding groove 102d ₅ in the longitudinal center of the cutter blade 102 is positioned between the cutting guide portion 15a of the tip and the cutting folding tool 1 of the handle 101 of the cutting knife 100, by adding bending load between the cutting knife 100 and blade folding tool 1 can be easily and safely cut along the groove 102d ₅ fold blade cutter blade 102.

In the method shown in FIG. 8, when one longitudinal direction of the cutter blade 102 is inserted into the cutter blade insertion portion 10 of the blade folding tool 1A, the other is inserted into the cutter blade insertion portion 10 of the other blade folding tool 1B. Insert into. In this state, since the fifth blade folding groove 102d _{5 at} the center in the longitudinal direction of the cutter blade 102 is positioned between the cutting guide portions 15a and 15a of the two blade folding tools 1A and 1B, the blade folding tool 1A, by adding a bending load and the fulcrum between 1B, can be easily and safely cut along the groove 102d ₅ fold blade cutter blade 102.

  Next, FIG. 9 is a front view showing a second embodiment of the blade-type cutter blade folding tool according to the present invention.

  In the blade folding tool 1 according to the second embodiment, the difference from the first embodiment described above is that the front plate 13 is formed with a cutting guide portion 13a extending symmetrically with the cutting guide portion 15a of the back plate 15A, That is, the end portion 18 of the cutter blade insertion portion 10 is formed in a mountain shape including a contact surface 18a parallel to the cutting guide portion 15a and a contact surface 18b parallel to the cutting guide portion 13a.

That is, the cutting guide portion 15a and the contact surface 18a parallel to the cutting guide portion 15a form an inclination angle θ with respect to the rail portions 11 and 12, whereas the cutting guide portion 13a and the contact surface 18b parallel to the cutting guide portion 15a are The rail portions 11 and 12 are inclined at an inclination angle −θ, that is, in a direction opposite to the cutting guide portion 15a. Further, the length between the cutting guide portion 13a and the contact surface 18b of the end portion 18 is equal to the length between the cutting guide portion 15a and the contact surface 18a of the end portion 18, and is shown in FIG. It is equivalent to S ₁ shown. Other configurations are basically the same as those in the first embodiment.

Therefore, when the cutter blade 102 shown in FIG. 1 is inserted into the cutter blade insertion portion 10 in the direction shown in FIG. 1, for example, the base end edge 102 c of the cutter blade 102 is the end portion of the cutter blade insertion portion 10. with parallel contact with the abutting surface 18a in 18, so that the fifth blade folding groove 102d ₅ is cutting guide portion upper 15a in the longitudinal center of the cutter blades 102 extending parallel thereto.

Further, when the cutter blade 102 is inserted into the cutter blade insertion portion 10 in the opposite direction to the direction shown in FIG. 1, for example, the base end edge 102 c of the cutter blade 102 is the end portion 18 of the cutter blade insertion portion 10. with parallel contact with the abutment surface 18b in, so that the fifth blade folding groove 102d ₅ is cutting guide portion upper 13a in the longitudinal center of the cutter blades 102 extending parallel thereto.

Therefore, according to the blade folding tool 1 according to the second embodiment, when inserting the cutter blade 102 into the cutter blade insertion portion 10, it is not necessary to consider the orientation of the front and back of the cutter blade 102, and it is inserted in any orientation. also, because the blade folding groove 102d ₅ is always parallel to the cutting guide portion 15a or 13a, usability is further improved.

It is a front view which shows the cutter blade of the blade folding object by the blade folding tool for folding blade type cutter blades concerning this invention. It is a front view which shows the 1st form of the blade folding tool for folding blade type cutter blades which concerns on this invention. It is a rear view which shows the 1st form of the blade folding tool for folding blade type cutter blades which concerns on this invention. It is sectional drawing cut | disconnected in the position of the IV-IV line in FIG. It is a front view which shows the state which inserted the cutter blade into the blade folding tool for folding blade type cutter blades according to the first embodiment. It is sectional drawing cut | disconnected in the position of the VI-VI line in FIG. It is explanatory drawing which shows the method of folding a part of cutter blade set to the cutter knife with the blade folding tool for folding blade type cutter blades by a 1st form. It is explanatory drawing which shows the method of folding a cutter blade using a pair of folding blade type cutter blade folding tools by a 1st form. It is a front view which shows the 2nd form of the blade folding tool for folding blade type cutter blades which concerns on this invention. It is explanatory drawing which shows an example of the conventional method for folding the folding blade type cutter blade for cutter knives to required length.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Blade folding tool 10 Cutter blade insertion part 11, 12 Rail part 13, 14 Front board (one side board)
13a, 15a Cutting guide portions 15 to 17 Rear plate (other side plate)
18 End part 19 Spring part (holding means)
102 Cutter blade 102b Tip edge 102c Base edge 102d Blade folding groove

Claims (3)

  A cutter blade insertion part is formed between the one side plate and the other side plate, in which a part of the cutter blade in which a plurality of blade folding grooves having a predetermined inclination angle with respect to the longitudinal direction are formed at a constant pitch can be inserted in the longitudinal direction. And at least one of the one side plate and the other side plate is provided with a cutting guide portion that is located at a tip of the cutter blade insertion portion and serves as a fulcrum when the blade is folded, and this cutting guide portion is inserted into the cutter blade. An angle of inclination corresponding to the blade folding groove with respect to the direction is formed, and the length from the terminal portion of the cutter blade insertion portion in the cutter blade insertion direction to the cutting guide portion is determined from one edge of the cutter blade to the cutter blade. A blade folding tool for a folding blade type cutter blade, characterized by having a length corresponding to the length to a specific blade folding groove in the blade.   The folding tool for a folding blade type cutter blade according to claim 1, further comprising holding means for holding the cutter blade in the cutter blade insertion portion.   2. The blade cutter for a folding blade type cutter blade according to claim 1, wherein the cutting guide portion is formed on both the one side plate and the other side plate and extends in directions opposite to each other.

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