JP2006326698A - Drill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drill capable of exactly and smoothly performing drilling, even if the drill is provided with male blade and female blade set to generate clearance in a fitting state. <P>SOLUTION: In this drill 1, the male blade 9 and the female blade 6 are loosely fitted. The male blade 9 is provided with a projection part 92 functioning as a first displacement preventing part to prevent paper sheets from positionally deviating from the male blade 9. The female blade 6 is provided with a blade part 62 functioning as a second displacement preventing part to prevent paper sheets from positionally deviating from the female blade 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a punch that can punch paper such as paper.

Conventionally, a male blade and a female blade having an inner diameter that can be fitted to the male blade are provided, and the male blade is fitted to the female blade with the paper sandwiched between the male blade and the female blade. Therefore, various punches are considered on the paper. Usually, in such a punch, the dimensions of the outer diameter of the male blade and the inner diameter of the female blade are set so that the male blade and the female blade can be fitted with almost no gap. Can be performed accurately (see, for example, Non-Patent Document 1). In addition, a drilling tool is also conceivable in which the male blade can be appropriately replaced so that the male blade can be flexibly dealt with when the male blade is damaged.
KOKUYO Office Surprise Edition 2005 edition, published by KOKUYO S & T Co., Ltd., December 2004, P.I. Various drilling tools shown at 442

  However, in the case of adopting a mode in which the male blade and the female blade are fitted almost closely, when the male blade is replaced with the original mounting position when the male blade is replaced, the male blade There is a problem that the blade cannot be fitted into the female blade and the drilling operation cannot be performed. Therefore, the inner peripheral diameter of the female blade is set larger than the outer peripheral diameter of the male blade so that a clearance is generated between the male blade and the female blade in the fitted state, and this clearance absorbs the displacement of the mounting position of the male blade. An embodiment configured to be able to do so is also possible. However, in such an aspect, when the male blade presses the paper, the male blade and the female blade are loosely fitted to each other during drilling. Or, it is easy to be displaced with respect to both, and as a result, there is a problem that a part of the punching hole remains on the sheet without being separated from the sheet and a problem that the punching position shifts, and the punching cannot be performed accurately and smoothly. There's a problem.

  The present invention has been made paying attention to such a problem, and its main purpose is to provide an accurate and smooth even when a male blade and a female blade are set so that a clearance is generated in a fitted state. An object of the present invention is to provide a drilling tool that can be used for drilling.

  That is, the punching tool of the present invention comprises at least a male blade and a female blade into which the male blade can be fitted, and a paper sheet such as paper is sandwiched between the male blade and the female blade. A punching device for punching the paper sheet by fitting the male blade and the female blade with a clearance in a state of being in a state, wherein the paper sheet is misaligned with respect to the male blade. And a second misalignment prevention unit for preventing the paper sheets from being misaligned with respect to the female blade. It is characterized by.

  If it is such, even if it is set so that a slight clearance is generated between the male blade and the female blade in the fitted state, that is, the male blade and the female blade are loosely fitted, Since the first misalignment prevention unit and the second misregistration prevention unit do not cause misalignment with respect to the male blade and the female blade, a part of the paper such as the peripheral edge of the binding hole formed in the paper by the punching operation As a result, it is possible to perforate accurately and smoothly without causing a problem that a part of the punching hole remains on the paper without being separated from the paper and a problem that the punching position shifts. it can. Further, even when the male blade is configured to be replaceable, a deviation in the mounting position of the male blade can be absorbed by the clearance, and the utility is excellent.

  As a specific embodiment of the first misalignment prevention unit, there is a protrusion provided at the tip of the male blade main body and capable of being stuck in the paper sheet.

  On the other hand, a specific embodiment for preventing the second misalignment includes a substantially serrated blade portion formed along the circumferential direction on the inner peripheral edge of the female blade main body. In this case, if the blade portion rises toward the male blade, the blade portion abuts against the paper sheet in preference to the female blade body, so that the paper sheet is more reliably It is possible to prevent displacement from occurring with respect to the female blade.

  As described above, according to the present invention, even if the clearance between the male blade and the female blade is set in a state where the male blade is fitted in the female blade, the paper sheet is the first one. Since the misalignment prevention unit and the second misalignment prevention unit do not cause misalignment with respect to the male blade and the female blade, a part of the paper (periphery edge of the binding hole formed in the paper by the punching operation) fits into the clearance during punching. It is possible to perforate accurately and smoothly without entering. Further, even when the male blade is configured to be replaceable, a deviation in the mounting position of the male blade can be absorbed by the clearance, and the utility is excellent.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The punch 1 according to this embodiment includes a male blade 9 and a female blade 6 into which the male blade 9 can be fitted, and a sheet of paper that is between the male blade 9 and the female blade 6. The paper P is perforated by fitting the male blade 9 and the female blade 6 with the P sandwiched between them. Specifically, as shown in FIG. 1, the base 2 provided with the female blade 6 and The operation unit 3 that directly applies a predetermined operation force when the user drills, the support unit 4 that is interposed between the base 2 and the operation unit 3 and supports the operation unit 3, and the male blade 9 are detachable. And a movable portion 5 that can slide with respect to the support portion 4 when a predetermined operation force is applied to the operation portion 3.

  The base 2 includes a base body 21 and a base cover 22 that can accommodate the base body 21.

  The base body 21 is made of, for example, a single sheet metal material, and integrally includes a bottom surface portion 211 having a substantially rectangular shape in plan view and a hanging piece (not shown) in which four sides of the bottom surface portion 211 are bent downward. A recessed portion 212 that is recessed from another portion is provided at a predetermined position on the rear edge portion side of the bottom surface portion 211, and the female blade 6 is accommodated in the recessed portion 212 (see FIG. 4A and the like described later). In the present embodiment, the recesses 212 are provided at two locations separated by a predetermined distance, and the female blade 6 is accommodated in each recess 212. A through-hole 212 a that penetrates in the thickness direction is provided in the center of each recess 212.

  As shown in FIG. 2, the female blade 6 is made of, for example, metal, and integrally includes a female blade main body 61 having a substantially disk shape and a blade portion 62 formed on the inner peripheral edge 61 a of the female blade main body 61. It is what you have. The blade portion 62 has a substantially serrated shape and rises toward the male blade 9 described later. The female blade 6 is fixed to the recess 212 in a non-detachable manner by appropriate means. In this fixed state, the inner peripheral edge 61a of the female blade body 61 and the through hole 212a of the recess 212 are in communication. Further, the backup member 7 is provided at a position where the female blade body 61 can be covered from above. The backup member 7 is made of, for example, a urethane material, and a round hole 71 having a diameter slightly larger than the diameter of the inner peripheral edge 61a of the female blade main body 61 is formed at the center. In the present embodiment, the thickness dimension of the backup member 7 is set slightly larger than the rising dimension of the blade portion 62, and the backup member 7 is attached to the female blade main body 61 and the double-sided tape or adhesive applied to the lower surface side of the backup member 7. The base body 21 is fixed to the bottom surface portion 211. Further, a paper pressing portion 8 that can press the paper P while being sandwiched between the backup member 7 is provided in the vicinity of the location where the female blade 6 is attached. The paper pressing portion 8 is made of, for example, a translucent synthetic resin material, has a shape that is gradually warped toward the tip, and has a through hole 81 having a diameter slightly smaller than the outer diameter of the backup member 7. The rear end can be attached to and detached from the base body 21 so that the through hole 81, the round hole 71 of the backup member 7, the inner peripheral edge 61a of the female blade 6 and the through hole 212a of the recess 212 communicate with each other. It is fixed (see FIG. 4A and the like described later).

  The base cover 22 is made of, for example, a synthetic resin material and has a hollow, substantially rectangular parallelepiped shape with an open top. The base cover 22 accommodates a section of the paper P that is cut by the perforating operation in a state where the base body 21 is accommodated. Functions as a perforated waste container. The base cover 22 is engaged with the base main body 21 by appropriate engaging means, and the base cover 22 is removed from the base main body 21 by releasing the engagement state between the base cover 22 and the base main body 21. The perforated waste Pb accumulated in the cover 22 can be discarded.

  The operation unit 3 is made of, for example, a synthetic resin material and has a hollow, substantially rectangular parallelepiped shape that opens downward. In the present embodiment, a shape in which both side edges of the upper part are rounded is employed.

  The support portion 4 has a lower end portion fixed to the base body 21 and an upper end portion attached to the inside of the operation portion 3 via a link mechanism configured using a spring or the like (not shown). In the present embodiment, the lower half of the lower end is fixed to the rear end of the base main body 21, and the paper P can be inserted between the front half of the lower end and the bottom surface 211 of the base main body 21 in this fixed state. A sheet insertion space PS is formed. A pair of left and right guide portions 41 that can guide the slide operation of the movable portion 5 described below is formed on the front surface portion of the support portion 4.

  The movable portion 5 is provided in association with the operation portion 3 and the support portion 4 via the link mechanism, and includes a movable portion main body 51 that is directly guided by the guide portion 41 of the support portion 4, and the movable portion main body 51. And holder portions 52 that are provided at both ends and hold the male blade 9. In this embodiment, the movable part main body 51 and the holder part 52 are integrally formed using a synthetic resin material.

  The holder part 52 holds the male blade 9 so as to be detachable, and has a substantially cylindrical shape opened downward. The holder 52 is formed with a side opening 521 and a front opening 522 that are partially opened continuously on the outside and the front, and a male opening is made using the side opening 521 and the front opening 522. A blade 9 is attached.

  As shown in FIG. 2, the male blade 9 includes a substantially cylindrical male blade main body 91, a protrusion 92 that is provided at the tip end portion (lower end portion in the present embodiment) of the male blade main body 91 and can pierce the paper P, An engagement holding portion 93 that is attached so as to cover a substantially half portion on the base end portion (upper end portion in the present embodiment) side of the male blade main body 91 and engageable with the holder portion 52 is provided.

  The male blade main body 91 is made of, for example, a synthetic resin material, and has a substantially bar shape in which the outer diameter at the distal end portion is gradually increased toward the distal end. The maximum outer diameter dimension of the male blade main body 91 is set smaller than the diameter dimension of the inner peripheral edge portion 61 a of the female blade 6.

  The protrusion 92 is made of, for example, a substantially bar-shaped metal material, sharpens the tip portion (lower end portion in the present embodiment), and the male blade main body 91 so that the tip portion is exposed to the tip portion of the male blade main body 91. It cannot be removed.

  The engagement holding portion 93 has a substantially oval shape in plan view and can accommodate the male blade main body 91 inside, a stepped pin portion 932 provided at the upper end portion of the main body portion 931, and a lower end of the main body portion 931. A substantially disc-shaped flange 933 provided in the portion and a gripping portion 934 that protrudes laterally from the side surface of the arcuate shape of the main body 931 and can be gripped are integrated.

  In the present embodiment, the male blade main body 91 is provided with a patch set Ta formed by laminating a plurality of so-called patches T functioning as a protective sheet for protecting the peripheral edge of the binding hole Pa formed on the paper P by the punching operation. It is attached so that it can be replaced. Each patch T is a disc-shaped translucent seal, and an adhesive such as glue is applied to the surface facing the paper P (the lower surface side in this embodiment), and a plurality of patches T are laminated. A single patch set Ta is formed by polymerizing in the form of a patch. The inner diameter of each patch T is set slightly larger than the outer diameter of the male blade main body 91. Such a patch set Ta is inserted into the male blade main body 91 before the engagement holding portion 93 is attached from the base end portion (upper end portion in this embodiment) side. In this case, the patch set Ta is prevented from easily falling off from the front end side of the male blade main body 91 by gradually increasing the outer diameter of the front end portion of the male blade main body 91. Next, the substantially disc-shaped patch pressing portion H that functions as a cushion material is inserted from the base end side of the male blade main body 91, and the engagement holding portion 93 is attached to the base end portion side of the male blade main body 91. The patch set Ta can be set to 9.

  In order to hold such a male blade 9 on the holder portion 52 of the movable portion 5, first, the protruding direction of the grip portion 934 of the male blade 9 is matched with the opening direction of the side opening 521 of the holder portion 52. The male blade 9 is inserted into the holder portion 52 from the side opening 521. Next, the male blade 9 is rotated while gripping the grip portion 934 so that the grip portion 934 is positioned at the front opening 522 of the holder portion 52. As a result, the stepped pin portion 932 of the engagement holding portion 93 engages with the hook portion 52 a (see FIG. 1) provided inside the holder portion 52, and the male blade 9 is stably held by the holder portion 52. The In this holding state, the flange portion 933 of the engagement holding portion 93 is positioned on the lower end side of the holder portion 52, and the male blade main body 91 is positioned above the blade portion 62 of the female blade 6.

  Next, a method of using the punching tool 1 having such a configuration and an action thereof will be described with reference to action explanatory diagrams shown in FIGS. 3 and 4. 3 and 4 schematically show the punching operation of the punching tool 1 centering on the operation of the male blade 9 during drilling.

  First, the paper P to be punched is inserted into the paper insertion space PS from the front of the punch 1 and a predetermined portion of the paper P (a portion near the binding hole Pa forming portion in this embodiment) is utilized by using the paper pressing portion 8. Hold down (see FIG. 3A). An intermediate position display unit that displays that the position is the intermediate position between the two binding holes Pa formed in the support may be provided, and the paper P may be set using the intermediate position display unit as a guide. Next, when an operation force that pushes the operation unit 3 downward is applied to the operation unit 3, the movable unit 5 slides downward with respect to the support unit 4 via a link mechanism (not shown) together with the operation unit 3, and moves downward by a predetermined distance. At the time of sliding movement, the projection 92 of the male blade 9 held by the holder 52 passes through the through hole 81 of the paper presser 8 and pierces the paper P (see FIG. 5B). Thereby, the position of the male blade 9 with respect to the paper P is positioned, and the relative position between the paper P and the male blade 9 is prevented from being unexpectedly shifted. Thus, the protrusion 92 of the male blade 9 functions as a first misregistration prevention unit of the present invention that prevents the paper P from being misaligned with respect to the male blade 9.

  Next, when the operation force is continuously applied as it is, the tip end portion (the lower end portion in the present embodiment) of the male blade main body 91 comes into contact with the front surface of the paper P, and the contact portion and the vicinity thereof on the paper P move downward. Then, the backup member 7 is elastically deformed and dented, and the blade portion 62 of the female blade 6 comes into contact with the back surface of the paper P in preference to the female blade body 61 (see FIG. 10C). Thereby, the position of the female blade 6 with respect to the paper P is positioned, and the relative position between the paper P and the female blade 6 is prevented from being shifted unexpectedly. In this way, the blade portion 62 of the female blade 6 functions as a second misalignment prevention portion of the present invention that prevents the paper P from being displaced relative to the female blade 6.

  Further, by continuing to apply the operating force, the male blade main body 91 enters the inner peripheral edge 61a of the female blade 6, and the portion of the paper P that contacts the tip of the male blade main body 91 and its vicinity are moved downward. The male blade main body 91 enters the through-hole 212a formed in the concave portion 212 of the base main body 21 while being pushed and cut by the blade portion 62 of the female blade 6 while the cut-out punching waste Pb is inserted into the protrusion 92 ( (Refer FIG.4 (d)). As a result, the binding hole Pa is formed in the paper P, and the lower surface of the patch T positioned at the lowermost end of the patch set Ta contacts the paper P at the peripheral edge of the binding hole Pa. Moreover, in this embodiment, in the state which inserted the male blade main body 91 in the inner peripheral part 61a of the female blade 6, it sets so that a clearance may arise between the male blade main body 91 and the inner peripheral part 61a.

  If the operating force is continuously applied, the male blade 9 sinks further downward, while the patch set Ta abuts on the peripheral edge of the binding hole Pa of the paper P and the patch pressing portion H positioned above the patch set Ta. When the male blade 9 moves downward by a predetermined distance, the patch pressing portion H and the hook portion 933 of the engagement holding portion 93 come into contact with each other. The patch set Ta is further pressed downward by the pressing portion H, and the lower surface of the patch T positioned at the lowermost end of the patch set Ta is in pressure contact with the peripheral edge portion of the binding hole Pa (see FIG. 5E). At this time, the peripheral edge portion of the binding hole Pa is in a pressure contact state between the patch T and the backup member 7.

  Then, by stopping the operation force, the movable portion 5 and the operation portion 3 are returned to their original positions by the action of the link mechanism (elastic return force such as a spring), that is, the movable portion 5 and the operation portion 3 are moved upward. Along with this, the male blade 9 held by the holder portion 52 of the movable portion 5 also moves upward, and as a result, the perforated waste Pb stuck in the projection 92 of the male blade 9 becomes a concave portion of the base 2 over time. While hitting the edge part of the through-hole 212a formed in 212, it falls out downward, and the patch T located in the lowest end among patch sets Ta is stuck to the peripheral part of the binding hole Pa (refer the figure (f)). The perforated waste Pb is accommodated in the base cover 22 that functions as the perforated waste accommodating portion. Finally, the paper P is removed from the paper insertion space PS, and the paper P can be bound into an appropriate binding tool (not shown) using the formed binding hole Pa. Further, the backup member 7 also returns elastically.

  As described above, when the punch 1 according to the present embodiment is provided with the protrusion 92 functioning as the first misalignment prevention unit that prevents the paper P from being misaligned with respect to the male blade 9 on the male blade 9. At the same time, the female blade 6 is provided with a blade portion 62 that functions as a second displacement prevention portion that prevents the paper P from being displaced relative to the female blade 6. Even when the clearance is set between the male blade main body 91 and the inner peripheral edge 61a of the female blade 6 in the state of being fitted into the inner peripheral edge 61a, the protrusion 92 and the blade 62 are formed on the paper P. Since the paper P is not displaced with respect to the male blade 9 and the female blade 6 by being stabbed or bite in, a part of the paper P (periphery of the binding hole Pa formed in the paper P by the punching operation) is formed during punching. Prevent inadvertent entry into the clearance One can be smoothly drilled. Further, when the male blade 9 is configured to be replaceable as in the present embodiment, the male blade 9 can be replaced or the male blade 9 can be reattached by damaging the projection 92 or refilling the patch set Ta. At this time, the displacement of the initial mounting position can be absorbed by the clearance, and the practicality is excellent.

  In particular, a projection 92 that is provided at the tip of the male blade main body 91 and can pierce the paper P, and a substantially serrated blade 62 formed along the circumferential direction on the inner peripheral edge 61a of the female blade main body 61, Since the paper P is prevented from being displaced with respect to the male blade 9 and the female blade 6, the paper P is displaced with respect to the male blade 9 and the female blade 6 while adopting an extremely simple structure. Can be reliably prevented.

  In particular, since the blade portion 62 rises toward the male blade 9, the blade portion 62 has priority over the female blade body 61 and bites into the paper P, so that the paper P is more reliably attached to the female blade 6. Can be prevented from being displaced.

  The present invention is not limited to the embodiment described in detail above.

  For example, in the above-described embodiment, the first misalignment prevention unit is configured by one projection provided at the tip of the male blade body. For example, a plurality of projections provided at the tip of the male blade body. Therefore, a mode in which the first shift prevention unit is configured may be adopted. Further, the protrusion may be made of a synthetic resin material instead of a metal material. Furthermore, the protrusion may be formed integrally with the male blade body. Moreover, you may employ | adopt the blade part which can bite into paper sheets as a 1st position shift prevention part.

  In addition, the sawtooth-shaped blade portion that functions as the second misalignment prevention portion may have a shape that protrudes in the radial direction instead of a shape that stands up toward the male blade. In this case, the female blade body cannot be preferentially brought into contact with the paper sheet, but even with such a blade portion, when the male blade is inserted into the inner peripheral edge portion, the blade portion is Therefore, the paper can be prevented from being displaced with respect to the female blade.

  Further, the number of male blades and female blades may be increased or decreased as appropriate, and a single-hole punch or multi-hole punch may be used.

  Of course, it is not limited to the type of attaching a patch, but may be a drilling tool dedicated to drilling.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 is an overall schematic view of a punching tool according to an embodiment of the present invention. The schematic diagram of the male blade and the female blade in the embodiment. Action explanatory drawing. Action explanatory drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Punching tool 6 ... Female blade 61 ... 2nd position shift prevention part (female blade main body)
61a ... inner peripheral edge 62 ... blade 9 ... male blade 91 ... male blade main body 92 ... first misalignment prevention portion (projection)
P: Paper sheets (paper)

Claims (4)

The male blade includes at least a male blade and a female blade into which the male blade can be fitted, and the male blade and the female in a state where a paper sheet such as paper is sandwiched between the male blade and the female blade. A punching tool for punching the paper sheet by fitting a blade with a clearance,
The male blade is provided with a first misalignment prevention portion that prevents the paper sheets from being displaced relative to the male blade, and the female blade is provided with the paper sheets relative to the female blade. A punching tool comprising a second misalignment prevention unit for preventing misalignment. 2. The punching device according to claim 1, wherein the first misalignment prevention unit is a protrusion provided at a tip of the male blade main body and capable of being stuck in the paper sheet. 3. The punching device according to claim 1, wherein the second misalignment prevention portion is a substantially serrated blade portion formed in an inner peripheral edge portion of the female blade main body along a circumferential direction thereof. The punching tool according to claim 3, wherein the blade portion rises toward the male blade.

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