JP4671703B2 - Cutting device - Google Patents

Description

  The present invention relates to a cutting device that cuts a conveyed sheet in a direction orthogonal to the conveyance direction.

  Generally, a cutting device called a guillotine cutter is used as a cutting device for cutting the conveyed paper in a direction orthogonal to the transport direction. This cutting apparatus includes a fixed lower blade and an upper blade that can move up and down, and cuts a sheet by rubbing the upper blade against the lower blade from above.

  8 and 9 are cross-sectional views showing a state in which the end portion 111 of the paper 11 conveyed in the arrow A direction is cut by the cutting device 40 described above. In the cutting device 40, when the upper blade 42 is lowered with respect to the lower blade 41 in the state immediately before the cutting operation shown in FIG. In addition, the paper 11 is cut to form a terminal end 111 as a cut end.

  By the way, when the cut end generated by cutting is a strip shape, the cut end may adhere to the blade surface 410 of the lower blade 41 as shown in FIG. 9 and cause jamming (paper jam). It was.

Therefore, conventionally, the techniques shown in Patent Documents 1 and 2 have been used to prevent the cut end from adhering to the lower blade. In Patent Document 1, the cut ends are removed by suction with a fan. In Patent Document 2, the static electricity of the paper is removed by a static elimination brush, thereby making it difficult to attach the cut edge to the lower blade.
JP 2000-335028 A Japanese Patent Laid-Open No. 8-208066

  However, the technique disclosed in Patent Document 1 requires not only a fan but also a fan drive source, a filter, and the like. There is also a problem that noise is generated by the rotation of the fan.

  With the technique of Patent Document 2, it is not always possible to sufficiently prevent sticking of pieces.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a cutting device that can reliably prevent a cut end from adhering to a lower blade with a simple configuration without increasing the size of the device itself.

The invention according to claim 1 is a cutting device that cuts the conveyed paper in a direction orthogonal to the transport direction, and includes a fixed lower blade and an upper blade that can move up and down, In the cutting apparatus that cuts the paper by rubbing the upper blade from above, the cutting device includes a blowing mechanism that blows air from above toward the lower blade on the rubbing surface side of the upper blade. the rubbing surface of the blade, provided opposite to the upper blade, and the longitudinal cover, protrudes toward the longitudinal cover body from the upper blade is provided, it comprises a lateral cover body, and the upper blade On the rubbing surface side, a lower opening space surrounded by the upper blade, the horizontal cover body, and the vertical cover body is formed, and the spray cover mechanism is such that the horizontal cover body moves down together with the upper blade. by pushing the air in the space of lapping surface side of the upper blade downwardly Ri, thereby has become so that spraying from above the air of the space towards the lower blade, is characterized in that.

According to a second aspect of the present invention, in the first aspect of the present invention, a neutralizing brush is provided at a lower portion of the vertical cover body so as to come into contact with the conveyed paper.
According to a third aspect of the present invention, in the second aspect of the present invention, the tip of the static elimination brush extends below a height position where the paper is conveyed.

  According to the first aspect of the present invention, when the upper blade is lowered and the cutting operation is performed, the spraying mechanism operates. That is, when the horizontal cover body is lowered together with the upper blade, the air in the space surrounded by the upper blade, the horizontal cover body, and the vertical cover body is pushed downward and blown from above toward the lower blade. Thereby, the cut end made by the cutting operation of the paper is blown off from above the lower blade. Therefore, it is possible to reliably prevent the cutting edge from adhering to the lower blade.

  Moreover, since the spray mechanism is only comprised by the vertical cover body and the horizontal cover body, a structure is simple.

  Furthermore, since the spray mechanism is only provided using the space above the lower blade, it is possible to prevent the cutting apparatus from becoming large due to the provision of the spray mechanism.

According to the second aspect of the present invention, since static electricity can be removed from the paper, that is, from the cut end, adhesion of the cut end to the lower blade can be more reliably prevented. And since the static elimination brush is provided integrally with the spraying mechanism, the enlargement of the cutting device by providing the static elimination brush can be prevented.
According to the third aspect of the present invention, since the paper advances while contacting the tip of the static elimination brush, static electricity can be removed from the paper, and the cut end can be pushed downward by the tip of the static elimination brush.

  FIG. 1 is a front view of the cutting apparatus of the present invention, and FIG. In addition, although the internal structure was shown with the broken line in FIG. 2, it is abbreviate | omitting in FIG.

  The cutting device 40 includes a fixed lower blade 41 and an upper blade 42 that can move up and down. Both the blades 41 and 42 are disposed along a direction orthogonal to the sheet conveyance direction, and are supported by a leading end support portion 43 and a base end support portion 44 on both sides. The base end support portion 44 is provided with gears 441 and 442. The gear 442 is connected to the crank 443 through the operating shaft 4421. The upper blade 42 is configured such that the distal end portion 422 moves up and down about the base shaft 421 as the crank 443 rotates about the base shaft 4431. The distal end portion 422 is supported by the distal end support portion 43 by a frame 431 so as to be movable up and down. With such a configuration, the cutting device 40 cuts the sheet by rubbing the upper blade 42 against the lower blade 41 from above.

  And the cutting device 40 of this invention is air from upper direction toward the lower blade 41 in the rubbing surface 420 side of the upper blade 42, as shown in FIG. 3 which is III-III sectional drawing of FIG. 1 or FIG. A spraying mechanism 6 for spraying is provided. The spray mechanism 6 includes a vertical cover body 61 and a horizontal cover body 62.

  The vertical cover body 61 is provided to face the upper blade 42 on the rubbing surface 420 side of the upper blade 42. The facing interval W is generally set to the thickness of the lower blade 41. In addition, the space | interval W may be narrower than the thickness of the lower blade 41, as long as the effect by the spraying mechanism 6 mentioned later can be exhibited.

  Both sides of the vertical cover body 61 are fixed to the distal end support portion 43 and the proximal end support portion 44 by bolts 611 and 612. The vertical cover body 61 includes a vertical plate portion 613 facing the upper blade 42, and a horizontal plate portion 614 extending from the upper edge of the vertical plate portion 613 to the upper blade 42 side.

  The horizontal cover body 62 is provided so as to protrude from the upper surface of the upper blade 42 toward the vertical cover body 61. The protruding tip 6211 is located immediately before contacting the vertical cover body 61. The horizontal cover body 62 includes a horizontal plate portion 621 and a vertical plate portion 622, and is fixed to the upper blade 42 by bolts 623 at the vertical plate portion 622.

  As a result, a lower-open space S surrounded by the upper blade 42, the horizontal cover body 62, and the vertical cover body 61 is formed on the rubbing surface 420 side of the upper blade 42.

  Furthermore, the spraying mechanism 6 having the above-described configuration includes a neutralizing brush 7 at the lower portion of the vertical cover body 61. The static elimination brush 7 includes a base portion 71 and a brush portion 72. The base portion 71 is fixed to the front side of the lower portion of the vertical plate portion 613 with a bolt 711. The brush tip of the brush portion 72 extends downward from a height position H (FIG. 3) where the paper is conveyed.

The cutting device 40 having the above-described configuration operates as follows.
First, as shown in FIG. 4, the paper 11 is conveyed in the direction of arrow A through the cutting device 40 with the upper blade 42 in the raised position. At this time, since the paper 11 is in contact with the brush portion 72 of the static elimination brush 7, static electricity is removed from the paper 11. Next, when cutting the paper 11 at the end portion 111, the conveyance of the paper 11 is stopped in the state shown in FIG. 5, that is, in the state where the end portion 111 of the paper 11 is in the cutting position. Then, as shown in FIG. 6, the upper blade 42 is lowered and rubbed against the lower blade 41. That is, a cutting operation is performed. As a result, the paper 11 is cut, and the end portion 111 is formed as a strip-shaped piece.

  By the way, since the cutting device 40 having the above configuration includes the spray mechanism 6, the spray mechanism 6 operates as follows when the cutting operation shown in FIG. 6 is performed. That is, when the upper blade 42 is lowered, the horizontal cover body 62 is also lowered accordingly, and the air in the space S is pushed downward by the descending horizontal cover body 62 and is applied to the blade surface 410 of the lower blade 41 as an air flow. Sprayed from above. For this reason, the end part 111 which became the cut end is blown off by the air flow.

  Therefore, in the cutting device 40 having the above-described configuration, the spray mechanism 6 reliably prevents the cutting edge from adhering to the lower blade 41.

  In addition, since the static electricity is removed from the paper 11 by the static eliminating brush 7, the end portion 111, which is a piece, is not charged with static electricity. Therefore, the attachment of the cut end to the lower blade 41 is more reliably prevented.

  Moreover, since the spray mechanism 6 is comprised only with the vertical cover body 61 and the horizontal cover body 62, a structure is simple.

  Furthermore, since the spray mechanism 6 is only provided using the space above the lower blade 41, the cutting device 40 can be prevented from being enlarged due to the provision of the spray mechanism 6.

  Moreover, in the cutting device 40 having the above-described configuration, since the brush tip of the brush portion 72 of the static elimination brush 7 is positioned below the transport height position H, the brush portion 72 is always at the end during the operation of the spraying mechanism 6. It abuts on the portion 111 from above. For this reason, the end portion 111 is pushed downward by the brush portion 72 when it becomes a cut end. That is, the cut end is scraped off by the static elimination brush 7. Therefore, the attachment of the cut end to the lower blade 41 is prevented more reliably.

In the cutting apparatus of the present invention, the following modified structure may be adopted.
(1) As shown in FIG. 7, the static elimination brush 7 is arrange | positioned away from the spraying mechanism 6, and the upstream of a conveyance direction. This also removes static electricity from the paper 11 that is transported to the cutting device 40 and cut.

(2) As shown by the one-dot chain line in FIG. 7, the cutting device 40 having the above configuration can be applied even when the conveyance direction of the paper 11 is the arrow B direction opposite to the arrow A direction. In this case, the cutting device 40 configured as described above is effective when cutting the paper 11 at the leading end 112. In this case, when the static elimination brush 7 is provided, it is necessary to provide the static elimination brush 7 on the upstream side in the direction of the arrow B as indicated by the one-dot chain line.

  Since the present invention can surely prevent the occurrence of a jam caused by sticking of a cut end to the guillotine cutter with a simple configuration, the industrial utility value is great.

It is a front view of the cutting device of the present invention. It is a rear view of the cutting device of the present invention. FIG. 3 is a sectional view taken along line III-III in FIG. 1 or FIG. 2. It is sectional drawing which shows the state before the action | operation of the cutting device of this invention. It is sectional drawing which shows the state just before the cutting operation | work following the state of FIG. It is sectional drawing which shows the state at the time of the cutting operation | work following the state of FIG. It is sectional drawing which shows the modification of the cutting device of this invention. It is sectional drawing which shows the state just before the cutting operation in the conventional cutting device. It is sectional drawing which shows the state at the time of the cutting operation | work in the conventional cutting device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Paper 40 Cutting device 41 Lower blade 42 Upper blade 420 Rub surface 6 Spraying mechanism 61 Vertical cover body 62 Horizontal cover body 7 Static elimination brush S Space

Claims (3)

A cutting device that cuts the conveyed paper in a direction perpendicular to the conveyance direction, and includes a fixed lower blade and an upper blade that can move up and down, and rubs the upper blade against the lower blade from above. In the cutting device that cuts paper by
Equipped with a blowing mechanism that blows air from above toward the lower blade on the rubbing surface side of the upper blade,
The spray mechanism is
A vertical cover body provided on the rubbing surface side of the upper blade so as to face the upper blade;
Provided to protrude toward the upper blade in the vertical cover body comprises a lateral cover body, and
On the rubbing surface side of the upper blade, a lower opening space surrounded by the upper blade, the horizontal cover body, and the vertical cover body is formed,
The spray mechanism is
By lateral cover body descends together with the upper blade, the air in the space of lapping surface side of the upper blade Ya press downward Ri, thereby to so that spraying from above the air of the space towards the lower blade A cutting device characterized by that.   The cutting device according to claim 1, wherein a neutralizing brush is provided at a lower portion of the vertical cover body so as to come into contact with the conveyed paper.   The cutting device according to claim 2, wherein a tip of the static elimination brush extends downward from a height position where the paper is conveyed.

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