JP6146420B2 - Cutting blade and tape dispenser - Google Patents

Description

  The present invention relates to a cutting blade and a tape dispenser for cutting a tape fed out from a wound state into a desired length.

  Conventionally, various cutting blades for cutting the tape into a desired length in a state where the wound tape such as an adhesive tape or a wrap film is fed out have been proposed. In recent years, cutting blades having various forms having a shape of a tip portion different from a shape having a sharp angle in a front view as in the past have been disclosed. (For example, see Patent Document 1 and Patent Document 2).

  As described in the above patent document, the shape of the tip of the cutting blade is appropriately formed by a technique such as a press so that the tape can be cut with a small operating force without providing a sharp angle in front view. At the same time, since there is no sharp corner when viewed from the front, it is possible to avoid hurting the hand even if the hand is accidentally touched by the cutting blade.

  However, the material of the tape to be cut by such a cutting blade is not limited to a tape mainly composed of cellophane, but may be polypropylene (PP) or the like even if it is limited to a tape dispenser that can be suitably used in an office or home, for example. Various materials such as polyethylene terephthalate (PET) are applied. Currently, depending on the material of these tapes, specific operations such as requiring operation force that makes the user feel uncomfortable when cutting, or intentionally concentrating the stress on the tape by twisting the tape greatly, etc. The current situation is that the user may be forced.

JP 2010-30031 A JP 2012-56772 A

  The present invention focuses on such problems, and an object thereof is to provide a cutting blade capable of cutting the tape with a small operation force regardless of the material of the tape, and a tape tip dispenser equipped with the cutting blade. Yes.

In order to achieve such an object, the present invention takes the following measures. That is, the cutting blade according to the present invention has a plate-like shape for insertion into a tape fed out from a wound state, and the tape fed out in a tensioned state from the end face side of the plate body. A cutting blade for cutting the tape into a desired length by inserting the tape, with the leading edge of the fed tape standing up in a direction perpendicular to the surface direction of the tape. And a contact portion that is provided adjacent to the base end side of the tape from the rising portion and that can contact the surface of the tape when the edge cuts the tape. Te becomes, said end edge, which forms a front view wave shape, that the wave amplitudes dimensions swinging front view, the rising portion is set larger than the rise dimension which rises from the abutment And features.

  Here, the “surface” of the tape is not limited to the surface of the pressure-sensitive adhesive tape to which the pressure-sensitive adhesive is applied, but is a concept including both front and back surfaces. That is, the surface of the tape includes both the wound inner surface and the outer surface. Further, the rising portion and the contact portion may be “adjacent”. That is, the term “adjacent” in the present specification includes not only a mode in which the rising portion and the contact portion are integrally provided, but also a mode in which the rising portion and the contact portion are provided without a gap.

  If it is such, when a tape contact | abuts to a contact part, a tape can be cut | disconnected smoothly by the edge located in the location protruded by the standing part. And when the finger touches, the finger comes into contact with the contact portion at the same time as the rising portion, so that the rising portion can be effectively avoided from penetrating deeply into the skin of the finger. The That is, according to the present invention, it is possible to provide a cutting blade capable of cutting the tape with a small operating force regardless of the material of the tape, and a tape tip dispenser including the cutting blade.

  In order to achieve the above-mentioned effect more reliably by ensuring that the abutting part abuts against the tape or, in some cases, a finger, the rising part and the abutting part are formed integrally. It is desirable to keep it.

  In order to form a rising part having high strength and excellent durability and to ensure smooth cutting of the tape, the contact part is continuous with the flat surface parallel to the surface direction of the tape and the rising part. Thus, it is preferable to have a curved surface capable of forming a single curve in a cross-sectional view.

  Here, the “flat surface” only needs to be flat in the sectional view of the blade, and is not limited to a mode in which the blade is flat in the front view.

  As a specific configuration for reliably preventing the rising portion from suitably cutting the tape and accidentally damaging the user's finger or the like, the rising dimension at which the rising portion rises from the contact portion is set to 0.02 to 0. The thing set to 2 mm can be mentioned. Here, when the rising dimension is smaller than 0.02 mm, it becomes difficult to cut the tape.

  On the other hand, if the rising dimension is set to a dimension larger than 0.2 mm, the tape can be cut with a smaller operation force than the above-described rising dimension set to 0.2 mm or less. . Here, the thickness of the skin of a normal human finger is about 0.2 mm. Therefore, if the thickness exceeds 0.2 mm, the skin of the finger or the like cuts the epidermis only by touching the rising portion without touching the contact portion, and the finger or the like may be damaged. However, the angle at which the finger actually touches the rising part is not always strictly along the thickness direction of the skin. Considering the softness of the skin of the fingers, it is possible to ensure safety that does not damage the fingers even if the rising dimension exceeds 0.2 mm.

  According to the present invention, it is possible to provide a cutting blade capable of cutting the tape with a small operation force regardless of the material of the tape, and a tape tip dispenser including the cutting blade.

The whole perspective view concerning a first embodiment of the present invention. The perspective view of the principal part. FIG. The rear view of the principal part concerning the embodiment. The AA line expanded sectional view which concerns on the principal part of FIG. The enlarged front view. Action explanatory drawing corresponding to FIG. Same as above. Same as above. The perspective view of the principal part which concerns on the modification of the embodiment. The expanded cross-sectional view corresponding to FIG. 5 which concerns on the modification. Explanatory drawing which concerns on the other modification of the embodiment. Same as above. Same as above. Same as above. The expanded cross-sectional view of the principal part which concerns on 2nd embodiment of this invention. The expanded cross-sectional view of the principal part in the comparative example which concerns on the embodiment. Explanatory drawing which shows the manufacturing process which concerns on the same embodiment. Explanatory drawing which shows the manufacturing process of the embodiment. The expanded transverse sectional view of the important section concerning the modification of the embodiment. Explanatory drawing which shows the manufacturing process of the modification.

<First embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  The tape dispenser 1 according to this embodiment is preferably used in an office or home. The tape dispenser 1 holds a refill R obtained by winding a tape T such as an adhesive tape using cellophane or another resin as a base material around a paper core R1, and is used when an adhesive tape is used. Only the length is drawn and cut.

  As shown in FIGS. 1 to 9, the tape dispenser 1 is rotatably supported by the main body while holding the refill R, a cutting blade for cutting the tape T, and a main body that can hold the refill R. And a rotating body 4. The main body includes a tape cutting part 21 that cuts the tape T, a shaft support part 22 that pivotally supports the rotating body 4, a housing part 23 that houses the refill R, and a blade fixing part 24 that fixes the cutting blade. Yes.

  In this embodiment, the cutting blade 3 has a plate-like shape mainly composed of an integrally formed metal plate, and is fixed by appropriate means such as being press-fitted into the blade fixing portion 24 or screwed. Yes. This cutting blade 3 is for inserting into the tape T fed out from the wound state, and is inserted into the tape T fed out in a tensioned state from the end face side of the plate. This is for cutting T into a desired length.

  Therefore, the cutting blade 3 according to the present embodiment includes a rising portion 31 provided by raising the edge 34 on the leading end side in the direction perpendicular to the surface direction of the tape T on the leading end side of the fed tape T. A contact portion 32 provided continuously from the rising portion 31 to the proximal end side of the tape T and capable of contacting the surface of the tape T when the end edge 34 is inserted into the tape T. Yes. Hereinafter, a specific configuration of the cutting blade 3 will be described.

  As shown in FIGS. 1 to 9, the cutting blade 3 is formed by integrally forming the rising portion 31 and the contact portion 32.

  In the present embodiment, the rising portion 31 refers to a region having a certain dimension from the end edge 34 on the leading end side of the tape T drawn out, and the end edge 34 and the end edge 34 to the base end side continuously. And a rising surface 33 that rises at an angle that can be inserted into the tape T when the tape T is cut. In this embodiment, the height dimension of the rising surface 33, that is, the rising dimension of the rising portion 31, is set to 0.02 to 0.2 mm, specifically 0.08 mm. As long as the rising angle of the rising surface 33 in the cross-sectional view is an angle that can be inserted without contacting the tape T when the tape T is cut as described above, the angle is not particularly limited. If there is, the tape T can be suitably cut. In this embodiment, as shown in FIGS. 2 to 4 and 6, the end edge 34 has a frontal curved wave shape, in other words, a substantially sine wave shape. The amplitude dimension at which the wave is amplified in front view is set to be larger than the dimension at which the rising portion 31 rises from the contact portion 32. Specifically, it is set to 0.26 mm. The end edge 34 has a pointed edge 37 that protrudes most when viewed from the front, and an inclined edge 38 that extends in the direction of inclination toward the pointed edge 37. In the present embodiment, the angle at which the inclined edge 38 extends toward the pointed edge 37 is set to 60 °.

  The contact portion 32 includes a flat surface 35 that is parallel to the surface direction of the tape T and a curved surface 36 that can form a single curve in a cross-sectional view continuously from the rising portion 31. Have. In the present embodiment, the shape of these abutting portions 32 is a curved wave shape like the rising portion 31. This is because in the manufacturing process of the cutting blade 3, it is simultaneously formed into a curved wavy line, in other words, a substantially sinusoidal shape.

  Thus, the cutting blade 3 according to the present embodiment rises so that the surface of the tape T comes into contact with the contact portion 32 almost simultaneously when the tape T comes into contact with the end edge 34 when the tape T is cut. The rising dimension of the part 31 is adjusted. Then, the tape T is cut as schematically shown in FIGS. That is, when the user pulls the tape T downward or obliquely downward to cut the tape T from the state shown in FIG. 7, the end edge 34 protrudes as shown in FIG. The tape T is preferentially cut at each of the tip edges 37 and the area in the vicinity thereof. Thereafter, as shown in FIG. 9, only a part of the region between the pointed edges 37 is torn by the operation force that pulls the tape T while the state where the tape T is in contact with the contact portion 32 is maintained. As a result, the tape T can be cut with a small operating force.

  By setting it as the above structures, the cutting blade 3 which concerns on this embodiment can cut | disconnect the tape T with a small operation force. In particular, in the present embodiment, unlike the case shown in the figure, when the finger touches the edge 34, the finger touches the abutting portion 32 simultaneously with the rising portion 31 in the same manner as the tape T abuts the abutting portion 32. Abut. Thereby, it is effectively avoided that the rising portion 31 penetrates deep into the skin of the finger. This is usually based on the fact that the thickness of the skin epidermis is rarely thinner than 0.2 mm. For example, even if the edge 34 enters the epidermis by the dimension of the rising portion 31, the contact portion 32. In this state, the edge 34 does not enter the epidermis beyond the dimension of the rising portion 31, and the epidermis itself is not cut.

  In the present embodiment, the rising portion 31 and the abutting portion 32 are integrally formed so that the abutting portion 32 reliably abuts on the tape T so as to achieve the above-described effect more reliably. .

  In the present embodiment, the abutting portion 32 is flat parallel to the surface direction of the tape T so that the rising portion 31 having high strength and excellent durability can be formed and the smooth cutting of the tape T is ensured. It is assumed that the surface 35 and the rising portion 31 have a curved surface 36 that can form a single curved line in a cross sectional view.

  In the present embodiment, as a specific mode for enabling the tape T to be cut with a smaller operating force, the edge 34 has a curved wave shape when viewed from the front, and a position where the tape T is preferentially cut is set. doing.

  In order to be able to cut the tape T with a smaller operating force, in this embodiment, the amplitude dimension in the rising direction of the wave is set larger than the dimension in which the rising portion 31 rises from the contact portion 32. ing.

  As a specific configuration for reliably preventing the rising portion 31 from accidentally damaging the user's finger and the like by cutting the suitable tape T, the rising portion is considered in view of the thickness of the normal skin epidermis as described above. The rising dimension 31 rises from the contact portion 32 is set to 0.02 to 0.2 mm.

<Modification>
Below, each modification of this embodiment is demonstrated. In this modification, components corresponding to the components of the above-described embodiment are denoted by the same reference numerals, and specific description thereof is omitted.

  As shown in FIGS. 10 and 11, the cutting blade 3 according to the present modification includes a metal portion 3 a constituting the rising portion 31 and a resin portion 3 b constituting the contact portion 32, unlike the above embodiment. Element. That is, the cutting blade 3 forms the rising part 31 and the contact part 32 separately.

  More specifically, the metal portion 3a is provided with a rising portion 31 at the tip thereof, and the rising portion 31 has an edge 34 and a rising surface 33 as in the embodiment. And the front view shape of the rising part 31 has comprised the waveform shape which bent the straight line. In addition, the amplitude dimension of the wave is formed larger than that of the above embodiment. Thereby, the number of the pointed edges 37 formed is less than that in the above embodiment. Moreover, in this modification, the angle of the front view in which the inclined edge 38 inclines is set to about 45 degrees, for example.

  The resin portion 3 b is provided with a flat contact portion 32 at the tip portion, and the contact portion 32 has only a flat surface 35. The abutting portion 32 has a waveform shape similar to that of the edge 34 in the front view. And this contact part 32 is located below 0.08 mm with respect to the edge 34 like the said embodiment. In other words, the resin portion 3b and the metal portion 3a are accurately positioned with respect to each other so that the rising portion 31 rises with a size of 0.08 mm with respect to the contact portion 32.

  Even in such a case, the tape T can be cut with a small operating force as in the above-described embodiment, and even if the finger of the user touches it, the finger is not damaged. That is, the cutting blade 3 according to the present invention is not limited to the structure in which the contact portion 32 and the rising portion 31 are integrated, and the same effect can be obtained even if the cutting blade 3 is configured separately.

  Further, in the above embodiment and the modification, the front view shape of the cutting blade 3 is formed in a wave shape, but of course, as shown in FIGS. 12 and 13, the shape of the cutting blade 3 is set linearly in the front view. Also good. When cutting the tape T, when the tape is brought into contact with the end edge 34 from a direction different from the extending direction of the end edge 34 by a user's finger fold or operation, the cutting edge 3 shown in FIG. 34 enters the tape T by the rising dimension of the rising portion 31, so that the tape T can be cut quickly while maintaining the state where the tape T is in contact with the contact portion 32. Further, since the cutting blade 3 shown in FIG. 13 is provided with the extending direction of the end edge 34 inclined, the user can perform the normal operation of lowering the leading end of the drawn tape T in the vertical direction, so that the tape T is attached to one side edge. Is started to be cut by the edge 34 and quickly cut.

  Even if it is such, both the quick cutting of the tape T and making it difficult to hurt fingers are made compatible as in the above embodiment.

  In the above embodiment, the angle of the wave shape formed in the front view, that is, the angle in the front view in which the inclined edge 38 is inclined may be any angle. That is, as shown in FIG. 14, the inclination angle θ1 of the inclined edge is set to be larger than the inclination angle θ according to the embodiment, that is, 60 °, or the inclination angle θ2 of the inclined edge 38 is set as shown in FIG. It may be set to an angle smaller than the inclination angle θ, specifically an angle smaller than 45 °.

  That is, as in the above embodiment and each modification, the cutting blade 3 contacts the tape T when the rising edge 31 having the edge 34 and the edge 34 adjacent to the rising edge 31 cut the tape T. As long as the abutting portion 32 is provided, it is possible to achieve both prompt cutting of the tape T and making it difficult to damage the fingers.

<Second embodiment>
Below, 2nd embodiment and a modification of this invention are described with reference to FIGS. Also in the present embodiment and the modified example, components corresponding to the constituent elements of the above-described embodiment are denoted by the same reference numerals, and specific description thereof is omitted.

  In the cutting blade according to the present embodiment, as shown in FIG. 16, the rising dimension α at which the rising part rises is set to a dimension larger than 0.2 mm. The configuration other than the rising dimension α is the same as that of the cutting blade 3 according to the first embodiment.

  With such a configuration, the tape T can be cut with a smaller operating force than that in which the rising dimension is set to 0.2 mm or less. Here, the thickness of the skin of a normal human finger is about 0.2 mm. Therefore, if the thickness exceeds 0.2 mm, the skin of a finger or the like cuts the epidermis only by touching the rising portion without touching the abutting portion 32, leading to the possibility of damaging the finger or the like. However, the angle at which the finger actually touches the rising part is not always strictly along the thickness direction of the skin. Considering the softness of the skin of the fingers, even if the rising dimension α exceeds 0.2 mm, the tape T can be cut with a smaller operating force, but the fingers are not damaged. It can also be secured. And if it is the cutting blade 3 which makes such a structure, even if it uses the tape T to which not only a cellophane but a various material which increased intensity | strength is used as a raw material of a base material, it cuts suitably with a small operation force. be able to. In other words, it is possible to provide the shredder blade 3 that can be suitably used regardless of the material used for the tape T.

  Here, as shown in FIG. 17 as a comparative example, if it is desired to sharpen the edge 34 in a sectional view of the cutting blade 3H, the inclined surface 31H is formed by sharply polishing the cutting blade 3H. Is also possible. However, in such a case, the metal part supporting the edge 34 becomes thin in the dimension in the rising direction. Therefore, it is considered that the durability is lower than that of the cutting blade 3 shown in FIG.

  And the cutting blade 3 which concerns on this embodiment can be shape | molded in the shape until the standup | rising dimension (alpha) exceeds 0.2 mm by performing an etching process with respect to a sheet metal raw material, for example. Of course, it is needless to say that the cutting blade 3 shown in FIG. 5 and the like in the first embodiment can also be manufactured by the etching process.

  18 and 19 show an example of an aspect in which an etching process is performed on a sheet metal material and the progress of the etching process. The cutting blade 3 according to the embodiment corrodes the surface of the sheet metal material, thereby masking the portion other than the etching portion E where the rising portion 31 and the contact portion 32 are to be formed by applying a masking agent. It is said. Further, the cutting blade 3 according to the embodiment forms a rising portion 31 and a contact portion 32 at both ends by performing masking processing on both ends in the extending direction of the sheet metal material. Thereby, even if it is one cutting blade 3, the durability as one cutting blade 3 is improved effectively by changing an attachment direction. Although not shown in the embodiment, a part of the masking portion M applied to the back side of the cutting blade 3 may be lost. Thereby, not only the processing time of the etching process can be shortened, but also the cutting blade 3 formed in various shapes can be provided.

<Modification>
As described above, the cutting blade 3 according to the present embodiment achieves satisfactory cutting of the tape T by the etching process. Here, if the etching process is applied, the masking portion M to be applied on the back surface side is removed in the same manner as on the front surface side, so that the cutting blade 3 shown in FIGS. 20 and 21 can be formed. In addition, in this modification, the masking portion M at the same position on the front and back sides is lost, but of course, various shapes of the cutting blade 3 can be formed by changing the position and size of the masking portion M on the front and back sides although not shown. .

  That is, the cutting blade 3 according to this modification is not limited to the contact portion 32 and the rising portion 31 similar to the above embodiment, but also the contact portion 32 and the rising portion 31 on the leading end side of the tape T from the end edge 34. Are formed with a second rising portion 31a and a second contact portion 32a having a shape which is substantially a contrast. As shown in FIG. 21, the cutting blade 3 shown in the same figure forms a masking portion M in which a masking agent is applied on both surfaces of a sheet metal material, performs an etching process on the etching portion E on one side, and thereafter An etching process is performed on the etching portion E on the surface side.

  Even in such a case, as in the above-described embodiment and modification, it is possible to ensure the safety of not damaging the fingers while allowing the tape T to be cut with a smaller operating force. is there.

  As mentioned above, although embodiment and the modification of this invention were demonstrated, the specific structure of each part is not limited only to embodiment mentioned above, A various deformation | transformation is possible in the range which does not deviate from the meaning of this invention. is there.

  For example, in the above-described embodiment, only the flat plate shape is disclosed among the plate blades in a plate shape, but of course, a plan view, that is, a sine wave shape, that is, a curved waveform shape in the thickness direction, a bent waveform shape, or the whole Alternatively, it may be a so-called three-dimensional shape that is curved or bent. If it is such, it will also become possible to provide the cutting blade itself with rigidity against bending.

  Further, for example, in the above-described embodiment, the rising portion and the abutting portion are each disclosed as a front view wave shape, but of course, only the rising portion is formed in a wave shape, and the flat surface of the abutting portion is linear. The curved surface may be formed in a three-dimensional shape. In addition, the specific aspects of the material and application of the tape to be wound are not limited to those of the above-described embodiment, and various aspects including the existing ones can be applied.

  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.

  INDUSTRIAL APPLICABILITY The present invention can be used as a cutting blade and a tape dispenser for cutting a tape fed from a wound state into a desired length.

DESCRIPTION OF SYMBOLS 1 ... Tape dispenser 3 ... Cutting blade 34 ... End edge 31 ... Rising part 32 ... Contact part 37 ... Pointed edge 38 ... Inclined edge

Claims (6)

It is in the form of a plate for insertion into a tape that has been unwound from the wound state, and is inserted into the tape that has been unwound in a tensioned state from the end surface side of the plate. A cutting blade for cutting into lengths,
A rising portion provided by raising the edge of the leading end side in the direction perpendicular to the surface direction of the tape on the leading end side of the tape that has been fed out;
A contact portion provided adjacent to the base end side of the tape from the rising portion, and the end edge of the tape can contact the surface of the tape when cutting the tape;
The edge has a front-view wave shape, and an amplitude dimension in which the wave is amplified in front view is set larger than a rising dimension in which the rising part rises from the contact part. Cutting blade. The cutting blade according to claim 1, wherein the rising portion and the contact portion are integrally formed. The cutting blade according to claim 2, wherein the contact portion has a flat surface parallel to the surface direction of the tape and a curved surface that can form a single curve in a cross-sectional view continuously from the rising portion. The cutting blade according to claim 1, 2, or 3, wherein a rising dimension at which the rising part rises from the contact part is set to 0.02 to 0.2 mm. The cutting blade according to claim 1, 2, or 3, wherein a rising dimension at which the rising part rises from the contact part is set to a dimension larger than 0.2 mm. A tape dispenser comprising the cutting blade according to claim 1.

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