JP5606186B2 - Container with cutting edge and method for manufacturing the same - Google Patents

Description

  The present invention relates to a container with a cutting blade including a resin film wound around, for example, a shaft member, and having a cutting blade for cutting the undissolved resin film, and a method for manufacturing the same.

  The above-mentioned container with a cutting blade is discarded when the resin film to be built-in disappears. At the time of disposal, the metal cutting blade is separated from the paper container main body in order to save resources by recycling. As a method for the separation, there has been proposed a method in which a part of a paper container main body to which a cutting blade is fixed is cut off from the paper container main body together with the cutting blade (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 11-171177

  By the way, in the case of the proposed method described above, the metal cutting blade is discarded together with a part of the paper container main body, so the material separation between the cutting blade and a part of the container main body is insufficient and recycled. There was a problem above. Therefore, it is conceivable to peel only the metal cutting blade from the paper container body. This makes it possible to completely separate the paper and the metal.

  However, when the caulking fixing portion is formed at a certain interval in the longitudinal direction of the metal cutting blade and the cutting blade is fixed to the edge of the paper container body by the caulking fixing portion, the longitudinal direction of the cutting blade In order to prevent the end of the blade from floating from the container body, a caulking fixing part is provided near the edge of the cutting blade, so when the edge of the cutting blade is grasped and the cutting blade is peeled off from the container body, the peeling starts. In some cases, the peeling strength increases, and it may be difficult to peel off.

  The present invention has been made in order to solve such a problem of the prior art, and has a cutting blade that can easily peel off the cutting blade even if the portion near the end of the cutting blade is fixed to the container body. An object is to provide a container and a method for manufacturing the same.

The container with a cutting blade according to the present invention is provided so as to be peelable in a state in the vicinity of the edge of the film outlet of the paper body containing the wound resin film and along the edge of the outlet. A cutting blade that cuts the resin film drawn out by a desired length, and the cutting blade is a thin metal plate having a substantially constant width, and is drawn at the edge of the drawing port by pulling away from the container body. It is possible to peel in the peeling direction along, and has a plurality of fixing parts provided along the peeling direction for fixing to the container body, and these fixing parts are substantially spaced from each other. The distance between the fixed portion of the central region to be equalized and the upstream and downstream ends in the peeling direction of the cutting edge to the closest fixed portion closest to the end is shorter than the distance in the central region. Including at least the fixed part Each of the fixed portions is formed of four triangular pieces formed by cutting the metal plate into a cross shape and bending it on the upstream side and the downstream side in the peeling direction, respectively. Each of the four triangular pieces has a configuration in which each of the four triangular pieces is folded back by biting into the container body at the apex corresponding to the intersection cut in the cross shape, The fixing part included in at least one end region of the end regions bites one of the four triangular pieces closer to the upstream end in the peeling direction than the other three triangular pieces. By making the depth shallow, the pullout strength of the two triangular pieces near the upstream end in the peeling direction is made smaller than the pullout strength of the two triangular pieces far from the end , and the pullout strength is partially increased. to small Characterized in that it is formed. In the case of the present invention, in at least one end region, even if the distance from the closest fixing portion closest to the end in the peeling direction (one direction) of the cutting edge to the end of the cutting edge is short, the fixing is performed. Since the pullout strength of the two triangular pieces near the end is smaller than the pullout strength of the two triangular pieces far from the end, the container of the fixed portion in the end region is peeled off from the end region. The peeling strength from the main body can be reduced, and the cutting blade can be easily peeled off from the container even if the portion near the end of the cutting blade is fixed to the container main body.

  Here, the pulling strength refers to the force required to pull the triangular piece from the container body in the vertical direction, and the peeling strength refers to the force required to grip the longitudinal edge of the cutting blade and peel off the cutting blade. I say power.

In the container with a cutting blade having this configuration, the fixed portion in the end region has a separation distance between the closest fixed portion and the end in addition to the closest fixed portion. One or two or more fixing portions that are longer than the interval and shorter than the interval in the central region are also included, and the fixing portion is close to the upstream or downstream end in the peeling direction of the four triangular pieces. By pulling one triangular piece into a smaller depth than the other three triangular pieces, the pulling strength of the two triangular pieces close to the end in the peeling direction is greater than the pulling strength of the two triangular pieces far from the end. Also, it can be configured to be small . Even in this configuration, the cutting blade can be easily peeled off from the container.

  In the container with a cutting blade having this configuration, the end regions on both sides are formed such that the fixing portions of the end regions are symmetrical with respect to the form of the biting depth of the four triangular pieces, and the peeling direction is It is good also as a structure corresponding to the peeling made into two directions of forward / reverse. In this configuration, the cutting blade can be easily peeled off even if it is peeled off from one end of the cutting blade or peeled off from the other end of the cutting blade.

In the container with a cutting blade having this configuration, the cutting blade is attached to the inside of the drawer opening of the container main body, and one of the two triangular pieces close to the end is the triangular piece having the smaller bite depth. It is preferable to have a configuration in which the cutting blade is disposed closer to the cutting edge than the triangular piece. In this configuration, when the film is cut, the film pulling force acts greatly on the triangular piece arranged on the side far from the blade edge with the edge of the drawer opening as a fulcrum, but bites into the side far from the blade edge. To prevent the cutting blade from peeling off from the container body during film cutting by arranging a triangular piece with a large depth and arranging a triangular piece with a shallower bite on the side closer to the blade edge. Is possible.

  The manufacturing method of the container with a cutting blade of the present invention uses a pin whose tip is pointed in a quadrangular pyramid, and one of the four inclined surfaces has a smaller inclination angle with respect to the axis than the other three, A fixing portion included in the end region is formed, and the triangular piece having a small bite depth is formed on an inclined surface having a small inclination angle of the pin. According to the present invention, it is possible to easily form the triangular piece having a small bite depth.

  In the case of the present invention, even if the distance from the closest fixed part closest to the edge in the peeling direction of the cutting edge to the edge of the cutting edge is short in at least one end region, The pull-out strength of the two triangular pieces near the edge is smaller than the pull-out strength of the two triangular pieces far from the end, so when peeling from the end area, pulling of the fixed part in the end area from the container body is performed. The peeling strength can be reduced, and the cutting blade can be easily peeled off from the container even if the end portion of the cutting blade is fixed to the container body.

(A) is an external appearance perspective view which shows the container with a cutting blade which concerns on one Embodiment of this invention, (b) is sectional drawing by the HH line | wire of (a). It is an expanded view of the container with a cutting blade of FIG. It is a figure which shows the fixed state of a cutting blade. It is explanatory drawing of the peeling state of a cutting blade. It is a figure which shows the right end part of the cutting blade in FIG. It is a figure which shows the left side edge part of the cutting blade in FIG. It is a figure which shows the fixing | fixed part contained in the right side edge part area | region of a cutting blade. It is a figure which shows the fixing | fixed part contained in the left side edge part area | region of a cutting blade. The pin which forms the fixing | fixed part of a cutting blade is shown, (a) is a front view, (b) is a top view. It is explanatory drawing (enlarged view) of the front-end | tip part of the pin of FIG. It is a figure which shows the formation process of the fixing | fixed part contained in the edge part area | region by the pin of FIG. It is a figure which shows the caulking process of the triangular piece formed as shown in FIG. It is explanatory drawing of the reason which can make it easy to peel a cutting blade from a container in case of one Embodiment of this invention. It is a figure which shows what formed all the four triangular pieces on the same conditions by the fixing | fixed part contained in a center area | region. It is a figure which shows the change of the peeling strength of the cutting blade in the case by one Embodiment of this invention, (a) is when it peels in the normal direction, (b) is when it peels in the reverse direction. It is a figure which shows the change of the peeling strength of the cutting blade in a prior art. It is explanatory drawing of the manufacturing line of the container with a cutting blade shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail.

  1A is an external perspective view showing a container with a cutting edge according to one embodiment of the present invention, FIG. 1B is a cross-sectional view taken along the line H-H in FIG. 1A, and FIG. 3 is a development view of a container with a cutting blade, FIG. 3 is a diagram showing a fixed state of the cutting blade, FIG. 4 is an explanatory diagram of a peeling state of the cutting blade, and FIG. 5 is a diagram showing a right end portion of the cutting blade in FIG. 6 is a view showing a left end portion of the cutting blade in FIG. 3, and FIG. 7 is a view showing a fixing portion of the cutting blade. In addition, in FIG. 1, the state which cut off the cutting part E is represented.

  This container 1 with a cutting blade includes a paper container body 10 containing a resin film 3 wound around a shaft member 2 and a cutting blade 20 for cutting the resin film. In the illustrated example, the container body 10 has two wide surfaces 10a, 10e facing each other and pasted out of the five wide surfaces 10a, 10b, 10c, 10d, 10e. Further, a cutting blade 20 is attached to the inner surface side of one wide surface 10a, and a cutout portion E is formed on the outer side of the cutting blade 20 of the wide surface 10a (see FIG. 2). In use, as shown in FIG. 1, the cut portion E is cut out so as to expose the cutting edge 21 of the cutting blade 20. Moreover, by cutting out the cutting part E, the blade edge 21 of the cutting blade 20 is exposed and the container body 10 is opened. By the opening, a drawer port 11 for drawing out the film 3 is formed between the two wide surfaces 10a and 10e.

  The cutting blade 20 is a thin metal plate having a substantially constant width, for example, a tin plate, and is provided along the edge (the end of the wide surface 10a after the cutting portion E is cut) 11a of the drawer port 11. The length 20 is slightly shorter than the length of the edge 11 a of the drawer opening 11. The cutting edge 21 is slightly exposed (protruded) from the drawing port 11 so that the film 3 drawn from the drawing port 11 can be cut.

  The cutting blade 20 has a plurality of fixing portions 22 for fixing to the container body 10 (see FIG. 3), and can be peeled away from the container body 10. As shown in FIG. 4, the cutting blade 20 in the present embodiment is configured so that the entire cutting blade 20 is moved in the direction D from the right to the left in a state where the drawer port 11 is opened and the cutting blade 20 is directed upward and toward the front. Although it is configured to be able to be peeled off and to be able to peel the entire cutting blade 20 in the direction opposite to the direction D, the direction D will be described as the peeling direction D below.

  For example, 20 fixing portions 22 are provided along the peeling direction D as shown in FIG. The first closest fixing portion 22 (1) from one (right) end 20b constitutes the fixing portion of the end region F1, and the first closest fixing portion 22c from the other (left) end 20c. The fixing portion 22 (20) constitutes a fixing portion of the end region F2. Further, the portion from the end 20b to the second fixing portion 22 (2) to the end 20c to the second fixing portion 22 (19) constitutes a fixing portion of the central region G, and the fixing portion of the central region G is The gaps K1 between the centers of the adjacent fixing parts are formed at the same pitch so as to be substantially equal. Note that the numbers in parentheses of the fixed portion 22 indicate the order from the end 20b.

  On the other hand, the fixed portion 22 (1) of the end region F1 has a distance K2 between its center and the center of the fixed portion 22 (2) smaller than the interval K1 in the central region G, and the fixed portion 22 (1) from the end 20b. The separation distance K3 to the center is set to be smaller than the distance K2. Further, the fixed portion 22 (20) of the end region F2 has an interval K4 between its center and the center of the fixed portion 22 (19) smaller than the interval K1 in the central region G, and the fixed portion 22 (20) from the end 20c. The separation distance K5 to the center is set to be smaller than the distance K4. Note that the center of the fixed portion 22 is a position corresponding to an intersection point O described later, and is the center of the rectangular area A. Further, the sum of the distance K2 and the separation distance K3 is substantially equal to the distance K1, and the sum of the distance K4 and the separation distance K5 is substantially equal to the distance K1.

  The fixed portion 22 (1) of the end region F1 shown in FIG. 5 and the fixed portion 22 (20) of the end region F2 shown in FIG. 6 are formed in line symmetry. The axis of symmetry is at the center of the peeling direction D of the cutting edge 20 and is a line perpendicular to the peeling direction D.

  Further, as shown in FIG. 7, the fixing portion 22 (1) of the end region F1 has four triangular pieces provided by cutting the rectangular region A so as to cross in a cross shape at two diagonal lines B1 and B2. 23, 24, 25, and 26, with triangular pieces 25 and 26 on the upstream side (side closer to the end 20b) in the peeling direction D, and triangular pieces 23 and 24 on the downstream side (side far from the end 20b). Two each are arranged. As shown in FIGS. 5 and 7, each of the four triangular pieces 23, 24, 25, and 26 has a vertex portion 23a, 24a, 25a, and 26a corresponding to the intersection point O of the two diagonal lines B1 and B2. And is folded back so as to bite into the paper container body 10 and is one of the four triangular pieces 23 to 26 and close to the end 20b is connected to the other three triangles. The biting depth is made shallower than the pieces 23 to 25. The pull-out strength of the two triangular pieces 25, 26 on the upstream side (side closer to the end 20b) having the triangular piece 26 whose depth of penetration is shallow is the two triangular pieces 23 on the downstream side (the side far from the end 20b). , 24 is less than the pullout strength. The pull-out strength of the two triangular pieces 25, 26 (or 23, 24) is the two triangular pieces 25, 26 (or 23, 24) that are peeled together when being peeled in the peeling direction D. Is the pullout strength. The above biting will be described later.

  On the other hand, the fixed portion 22 (20) of the end region F2 is configured symmetrically with the fixed portion 22 (1). That is, as shown in FIG. 8, the fixing portion 22 (20) has four triangular pieces 23, 24, 25 provided by cutting the rectangular area A so as to cross in a cross shape at two diagonal lines B1, B2. , 26, the triangular pieces 23 and 24 on the upstream side (the side far from the end 20c) in the peeling direction D, and the triangular pieces 25 and 26 on the downstream side (the side close to the end 20c) in the peeling direction D, respectively. Two are arranged. As shown in FIGS. 6 and 8, each of the four triangular pieces 23, 24, 25, 26 has a vertex portion 23a, 24a, 25a, 26a corresponding to the intersection point O of the two diagonal lines B1, B2, at the intersection point O. And is folded back so as to bite into the paper container body 10 and is one of the four triangular pieces 23 to 26 and close to the end 20c is connected to the other three triangles. The biting depth is made shallower than the pieces 23 to 25. The pull-out strength of the two triangular pieces 25, 26 on the downstream side (side closer to the end 20 c) having the triangular piece 26 whose depth of penetration is shallow is the two triangular pieces 23 on the upstream side (side far from the end 20 c). , 24 is less than the pullout strength.

  The four triangular pieces 23 to 26 having such a configuration are “cut and raised” as shown in FIG. 11 by the pin 30 shown in FIGS. 9 and 10 and “caulked” to the container body 10 as shown in FIG. And formed.

  The pin 30 has a cut-and-raised portion (tip portion) 31 having a rectangular cross-section, and in this embodiment, a square-shaped metal rod whose tip (upper end) is pointed like a quadrangular pyramid. , 35, 36. Here, by piercing the pin 30 through the material of the cutting blade, the peak 37c between the cut and raised surface 33 and the cut and raised surface 34 and the peak 37d between the cut and raised surface 35 and the cut and raised surface 36 are The portion of the diagonal line B1 is cut, and the ridge 37b between the cut and raised surface 34 and the cut and raised surface 35 and the ridge 37a between the cut and raised surface 36 and the cut and raised surface 33 cut the portion of the diagonal line B2. Along with this cutting, the triangular piece 23 is formed by the cut and raised surface 33, the triangular piece 24 is formed by the cut and raised surface 34, the triangular piece 25 is formed by the cut and raised surface 35, and the triangular piece 26 is formed by the cut and raised surface 36. .

The pin 30 has a first inclination angle θ1 with respect to the axis M of the cut and raised surface 36 smaller than a second inclination angle θ2 with respect to the axis M of the other three cut and raised surfaces 33, 34, and 35 having the same angle. (See FIG. 10). Note that the two-dot chain line in FIG. 10 represents the same angle as the second inclination angle θ2. Therefore, the length L1 of the cut and raised surface 36 is longer than the length L2 of the other three cut and raised surfaces 33, 34, and 35. Further, the first inclination angle θ1 is selected within a range of 24 ° to 29 °, and the second inclination angle θ2 is selected 2 ° or more larger than the first inclination angle θ1 and within a range of 26 ° to 32 °. It is.

  The distance N1 from the position on the axis M to the position where the perpendicular to the axis M passing through the position crosses the cut and raised surface 36 is the same as the distance N1 from the position on the same axis M to the axis M passing through the position. It becomes smaller than the distance N2 to the position where the perpendicular crosses the cut and raised surface 34.

  FIG. 11 shows the cutting and raising process by the pin 30. (a) shows an initial state, (b) shows an intermediate state, (c) shows an end state, and (d) finally forms a triangular piece. Indicates the state. In addition, the left side of FIG. 11 represents the formation process of the triangular piece 26, and the right side represents the formation process of the triangular piece 24.

  In the initial state of FIG. 11A, a cross-shaped (cross-shaped) cut along the diagonal lines B1 and B2 is formed at the intersection O which is the center of the rectangular area A.

  Subsequently, in the intermediate state of FIG. 11B, the cross-shaped cut along the diagonal lines B1 and B2 gradually increases as the pin 30 enters. That is, the size of the triangular piece 26 being formed and the size of the triangular piece 24 being formed gradually increase. At this time, since the distance N1 is smaller than the distance N2, the triangular piece 26 on the left side of the drawing is smaller in size and has a larger curve (bend) than the triangular piece 24 on the right side of the drawing.

  Subsequently, in the final stage state of FIG. 11C, the cut and raised at the end of the cut and raised surface 34 is almost finished, but the cut and raised surface 36 is in a state where the cut and raised is continued thereafter. . That is, the triangular piece 24 on the right side of the figure does not become any larger, but the triangular piece 26 on the left side of the figure is being formed at this timing, and a cross-shaped cut along the diagonal lines B1 and B2 is further formed. Therefore, it becomes large after this.

  Subsequently, in the final state of FIG. 11 (d), the triangular piece 24 on the right side of the drawing has a slightly raised and lowered posture (outside the rectangular area A), and the triangular piece 26 on the left side of the drawing is a triangular piece. It becomes a cut-and-raised posture in a state of being more than 24 and falling outward. Thereafter, the pin 30 is pulled out. The inclination of the cut and raised posture of the triangular piece 26 is determined based on the angle of the cut and raised surface 36, that is, the magnitude of the first inclination angle θ1, and the inclination of the cut and raised posture of one triangular piece 24 is determined by the cut and raised surface. The angle 34 is determined based on the magnitude of the second inclination angle θ2. Therefore, the first inclination angle θ1 is set to be smaller than the second inclination angle θ2 so that the triangular piece 26 is in a raising and raising posture in a state where the triangular piece 26 is tilted to the outside larger than the triangular piece 24.

  The other two triangular pieces 23 and 25 are affected by the triangular piece 26 in the portion close to the triangular piece 26 and are affected by the triangular piece 24 in the portion close to the triangular piece 24. However, the triangular piece 23 and the triangular piece 25 are formed in plane symmetry with a plane of symmetry passing through the axis M being sandwiched. Further, the cut-and-raised postures of the triangular piece 23 and the triangular piece 25 are formed in a state substantially close to the triangular piece 24.

  FIG. 12 shows a process in which the container main body is relatively approached to the cutting blade and the triangular piece is caulked against the container main body. FIG. 12 shows a case where the triangular pieces 26 and 24 are caulked for convenience. In this figure, (a), (c), (e) are cases where the triangular piece 26 is caulked, and (b), (d), (f) are cases where the triangular piece 24 is caulked. (B) represents a state in which the triangular piece 24 is in contact with the container body 10, (a) represents a state of the triangular piece 26 at a timing at which the triangular piece 24 is in contact with the container body 10, and (c), (D) represents a state in the middle of caulking, and (e) and (f) represent a state in which the caulking has been completed. Further, a pressing member (not shown) is pressed on the opposite side of the container body from the cutting edge (upper side in FIG. 12).

  As can be understood from FIG. 12, as shown in FIGS. 12A and 12B, when the triangular piece 24 comes into contact with the container main body 10, the triangular piece 26 in the cut-and-raised posture that falls more greatly than the triangular piece 24. There is a gap between the container body 10 and the container body 10. Thereafter, when the container body 10 and the cutting blade are brought close to each other, the triangular piece 24 gradually falls to the outside with the approach, and the tip of the triangular piece 24 bites into the container main body 10 (see (d)). . Thus, the fact that the tip of the triangular piece passes through the container body 10 is referred to as biting, and 12 in FIG. 12 is the biting portion. On the other hand, the triangular piece 26 in the cut-and-raised posture, which has fallen more than the triangular piece 24 from the beginning, starts to bite into the container body 10 as the tip approaches the container body 10 and is slightly parallel to the container body 10. At this time, since the triangular piece 26 is closer to the container body 10 than the triangular piece 24, the biting depth of the triangular piece 26 into the container main body 10 is extremely shallower than that of the triangular piece 24. Therefore, in the state where the caulking is finished, the triangular piece 24 has a large depth of biting into the container body 10 (the amount of the biting portion 12 is large) and has a high pulling strength. On the other hand, the triangular piece 26 has a shallow bite depth into the container body 10 (the amount of the bite portion 12 is small) and has a low pullout strength. Although the description is omitted, the penetration depth of the triangular pieces 23 and 25 into the container body 10 is smaller than the penetration depth of the triangular piece 24 into the container body 10, and the penetration depth of the triangular piece 26 into the container body 10. The pullout strength of the triangular pieces 23 and 25 is a value between the pullout strength of the triangular piece 24 and the pullout strength of the triangular piece 26.

  Therefore, in the end region F1 located on the upstream side in the peeling direction D, the distance from the end 20b to the triangular pieces 25 and 26 in the same fixing portion 22 (1) as shown in FIG. 13 is greater than the separation distance K3. The pulling strength Y of the two triangular pieces 25 and 26 close to the end 20b is far from the end 20b even if the distance from the end 20b to the triangular pieces 23 and 24 is slightly longer than the separation distance K3. Since the pulling strength Y1 of the two triangular pieces 23 and 24 is made smaller, the peeling strength X1 of the triangular pieces 25 and 26 and the peeling strength X2 of the triangular pieces 23 and 24 can be made substantially the same value. become.

  Therefore, even if the portion near the end 20b of the cutting blade 20 is fixed by the fixing portion 22 (1), unlike the conventional technique, the fixing portion 22 (1) can be peeled off with a small peeling strength. become. That is, in the case of the prior art, in the fixing portion close to the upstream end (corresponding to the end 20b) in the peeling direction, the pulling strength of the two triangular pieces close to the end and the pulling of the two triangular pieces far from the end are extracted. Since the strength is the same, when peeling two triangular pieces close to the end, the distance from the end on the upstream side in the peeling direction to the fulcrum is short, so a large peeling strength is required. This is because the peeling strength of the two triangular pieces 25 and 26 close to the end 20b can be set to a small force equivalent to the peeling strength of the two triangular pieces 23 and 24 far from the end 20b. Note that a fulcrum 1 in FIG. 13 indicates a fulcrum when the two triangular pieces 25 and 26 are peeled off, and a fulcrum 2 indicates a fulcrum when the two triangular pieces 23 and 24 are peeled off.

  On the other hand, in the fixing portions 22 (2) to 22 (19) in the central region G, as shown in FIG. 14, all four triangular pieces 27 of each fixing portion are used with pins (30A) (not shown) having the same inclination angle. And formed in the same state. In addition, the same configuration is used for any of the fixed portions 22 in the central region G.

  FIG. 15A is a graph when the cutting blade 20 is peeled off in the peeling direction D in the container 1 with a cutting blade of the present embodiment, and 10 samples are inspected, and FIG. It is a graph at the time of peeling off the cutting blade 20 in the direction opposite to the peeling direction D, and 10 samples are also set as inspection targets. FIG. 16 is a graph when the cutting edge is peeled off in the peeling direction D in a conventional container with a cutting edge, and 29 samples are the inspection targets.

  The vertical lines in FIGS. 15 and 16 indicate variations in measured values, and the horizontal lines attached to the upper and lower ends of the vertical lines indicate the maximum value and the minimum value. Moreover, the container with a cutting edge of the prior art from which the graph of FIG. 16 was obtained is the same number and the same positional relationship as the container with a cutting edge 1 of this embodiment, and each fixing part is configured. The four triangular pieces are configured to have the same pulling strength.

  As understood from FIGS. 15 (a) and 16, in the container with a cutting edge of the prior art, when the cutting edge is peeled off in the peeling direction, a very high peeling strength is required at the start, In the container 1 with a cutting blade of this embodiment, when the cutting blade 20 is peeled in the peeling direction D, the peeling strength can be reduced at the start. Moreover, in the container 1 with a cutting blade of this embodiment, the variation in peeling strength can be made small. Furthermore, in the container 1 with a cutting edge of this embodiment, since the form of the fixing | fixed part 22 is formed in line symmetry regarding the edge part area | regions F1 and F2, as understood from FIG.15 (b), it peels. When peeling in the direction opposite to the direction D, the peeling strength can be reduced at the start.

  In the above-described embodiment, the cutting blade is peeled off by assuming the two directions of the peeling direction D and the opposite direction, but the present invention is not limited to this, and the cutting blade is peeled off by the peeling direction. It is good also as a structure supposing one direction opposite to D or the peeling direction D. FIG. In that case, in the fixed portion of the end region on the upstream side in the direction of peeling, the pulling strength of the two triangular pieces closer to the end out of the four triangular pieces is small and 2 on the side far from the end. A configuration in which the pull-out strength of the three triangular pieces is increased is required, but the fixing portion in the end region on the downstream side in the peeling direction may be the same as the fixing portion in the central region G.

  FIG. 17 is a schematic diagram showing a production line of the above-described container 1 with a cutting blade.

  A first line 40 that transports the container body 10 formed in a predetermined shape from paper and a cutting machine 42 that is disposed below the first line 40 while unwinding the wound tin coil 41 is guided in the reverse direction. 2 line 43 and the 3rd line 45 which guides the resin tape 44 stuck to one edge part of the width direction of the tin coil 41 to the upstream rather than the cutting machine 42 of the 2nd line 43. The resin tape 44 is attached to one end of the cutting blade 20 as shown in FIGS. 2 and 4, and is used for gripping and peeling the cutting blade. The cutting machine 42 includes a fixed blade 42 a provided at a fixed height position and a movable blade 42 b provided so as to be movable up and down. The movable blade 42 b is moved up and down by a lifting member 46. In addition, a plurality of pins 30 are provided in the width direction of the tin coil 41 on the upstream side in the transport direction of the second line 43 in the lifting member 46, and the plurality of pins 30 are arranged in a row on the lifting platform 47. Has been. At this time, the pin 30 was used to form the fixing portion 22 in the end regions F1 and F2, and the pin 30A was used to form the fixing portion 22 in the central region G.

  In this manufacturing line, a lift 47 is raised at the tip of the tin coil 41 conveyed by the second line 43, and a plurality of fixing portions are formed in the width direction of the tin coil 41 by the pins 30. At this stage, the four triangular pieces of each fixing part are formed in a cut and raised state. Subsequently, the tin coil 41 is slightly fed out, the lifting member 46 is raised, the tin coil 41 is cut by the cutting machine 42, and the cutting blade 20 is produced. The fixed blade 42 a and the movable blade 42 b are provided with a blade that forms a jagged blade edge 21. Subsequently, the elevating member 46 is further raised. Prior to this ascent, the container body 10 having a predetermined shape conveyed by the first line 40 is stopped at a predetermined position by a stopper 48 provided on the first line 40. Squeeze four cut and raised triangles. The stopper 48 is lowered when the container body 10 is stopped at the predetermined position, and is raised at other times. Above the line in the first line 40, the above-described pressing member 49 that presses the container main body 10 stopped by the stopper 48 from above is provided.

  This production line makes it possible to continuously produce the container 1 with a cutting edge of the present embodiment.

  Further, in the present embodiment, as shown in FIG. 3, of the two triangular pieces 25, 26 close to the end 20 b, the triangular piece 26 having a shallow bite depth is more than the cutting blade 20 than the other triangular piece 25. It is arranged on the side close to the blade edge 21. The reason for this is that when cutting the film 3, a force for cutting the film 3 acts on the cutting edge 21, and the force acts on each of the triangular pieces 23, 24, 25, 26 using the edge 11 a of the drawer port 11 as a fulcrum. Since the triangular piece 24 having the largest bite depth is arranged on the side far from the blade edge 21 and the triangular piece 26 having a shallow bite depth is arranged on the side closer to the blade edge 21, This is because it is possible to prevent the cutting blade 20 from being detached from the container body 10 along with the film cutting.

  In the above-described embodiment, the end regions F1 and F2 include one fixed portion. However, the present invention is not limited to this and may be two or three or more. In this configuration, the form of the fixing portion included in the end region F1 or the end region F2 is the same as that of the closest fixing portion 22 (1) or 22 (20), that is, two triangular pieces close to the end. The pull-out strength is configured to be smaller than the pull-out strength of the two triangular pieces far from the end. Thus, even when the plurality of fixed portions of the end region F1 or the end region F2 are included, the cutting blade can be easily peeled upstream in the peeling direction.

  Further, in the above-described embodiment, as shown in FIG. 9, the corner portions 32 positioned at the four corners of the portion connected to the cut and raised portion (tip portion) 31 that is pointed in a substantially quadrangular pyramid shape are rounded. The reason is as follows. That is, in the case of using this pin 30, as shown in FIGS. 7, 8, 14, etc., the minimum width portion 28 between the upstream side and the downstream side of the formed fixing portion 22 is formed in an arc shape. This is because the arcuate portion 28 can make it difficult for the cutting blade 20 to be bent.

  Furthermore, in the above-described embodiment, the pin 30 has a square cross section, but the present invention is not limited to a square shape, and the cross section may be a rectangular shape. Moreover, you may use the pin which has the cut-and-raised surface 33-36 whose cross section is circular and whose pointed front-end | tip part inclined with (theta) 1 and (theta) 2 with respect to the shaft center.

DESCRIPTION OF SYMBOLS 1 Container with cutting blade 3 Resin film 10 Container main body 11 Drawer port 20 Cutting blade 21 Cutting edge 22 Fixed part 23, 24, 25, 26 Triangular piece 30 Pin D Separation direction O Intersection point θ1 First inclination angle θ2 Second inclination angle M axis Heart X1, X2 Peel strength Y, Y1 Pull strength

Claims (5)

A paper container body containing a wound resin film and a film main body with a film outlet opening in the vicinity of the edge of the container main body and along the edge of the outlet opening so as to be peeled off and pulled out by a desired length. A cutting blade for cutting the resin film,
The cutting blade is a thin metal plate having a substantially constant width, and can be peeled in the peeling direction along the edge of the drawer opening by being pulled away from the container body, and is provided along the peeling direction. A plurality of fixing portions for fixing to the container body, and these fixing portions are a fixing portion in the central region that makes the interval between adjacent ones substantially equal, and an upstream side and a downstream side in the peeling direction of the cutting blade The distance from the side end to the closest fixed portion closest to the end includes a fixed portion in both end regions including at least the closest fixed portion shorter than the interval in the central region;
Each of the fixing portions has four triangular pieces formed by cutting and bending the metal plate into a cross shape and arranging the two triangular pieces on the upstream side and the downstream side in the peeling direction, respectively. Each of the three triangular pieces is configured to be folded back by biting into the container body the vertex portion corresponding to the intersection cut in the cross shape,
The fixing portion included in at least one of the end regions on both sides is configured such that one of the four triangular pieces close to the upstream end in the peeling direction is replaced with the other three triangular pieces. by reducing the depth of bite than, the two pull-out strength of the triangular piece close to the upstream end of the peeling direction, and smaller than the pull-out strength of the two triangular pieces away from the end, partly A container with a cutting blade, which is formed so as to reduce the pull-out strength . In the container with a cutting blade according to claim 1,
In addition to the closest fixed portion, the fixed portion of the end region has a separation distance from the closest fixed portion that is longer than the interval between the closest fixed portion and the end. One or two or more fixing parts shorter than the interval are also included, and the fixing part is connected to the other three triangular pieces near the upstream or downstream end in the peeling direction among the four triangular pieces. By making the biting depth shallower than the triangular piece, the pulling strength of the two triangular pieces near the end in the peeling direction is made smaller than the pulling strength of the two triangular pieces far from the end. A container with a cutting blade. In the container with a cutting blade according to claim 1 or 2,
In the end regions on both sides, the fixing portions of the end regions are formed symmetrically with respect to the shape of the depth of the four triangular pieces, and the peeling direction is set to two directions of the reverse direction. A container with a cutting blade characterized by having a corresponding configuration. In the container with a cutting blade in any one of Claims 1 thru | or 3,
The cutting blade is attached to the inside of the drawer opening of the container body,
Of the two triangular pieces close to the end, the triangular piece having the smaller bite depth is arranged closer to the cutting edge of the cutting blade than the other triangular piece, . A method for producing a container with a cutting blade according to any one of claims 1 to 4,
The tip is pointed like a quadrangular pyramid, and one of the four inclined surfaces uses a pin with a smaller inclination angle with respect to the axis than the other three, and forms a fixed portion included in the end region. The method of manufacturing a container with a cutting blade, wherein the triangular piece having a small bite depth is formed on an inclined surface having a small inclination angle of the pin.

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