JP2006027214A - Sheet processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that it is difficult to load many bundles due to the increase of the whole thickness of a sheet bundle and the deterioration of storing and loading performance because sometimes a corner part is not formed with high appearance quality due to the round shape of the formed corner part caused by the flat shape of a pressure-contact roller, since folding for making a corner is performed with one flat pressure-contact roller by bringing the sheet bundle into pressure contact along the protruding part being a folding top regardless of the number and the state of the folded sheet bundles. <P>SOLUTION: The sheet processing device has the following constitution. The corner part is made further sharper by performing the folding for making a corner by traveling the roller after forming the shape of a contact face of the pressure-contact roller to a folding part of the sheet bundle into a protruding shape with a bulge near the center. The device is provided with a guide member, which moves along with the traveling of the pressure-contact roller on the upstream side in the traveling direction of the pressure-contact roller so that the pressure-contact roller is stably brought into contact with the protruding part being the top part, and also, which is for regulating the vertical movement of the protruding part at the time of pressure-contact. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sheet processing apparatus that performs processing on a spine portion of a sheet bundle that is simply folded, or formed by saddle stitching, saddle stitching, or the like.

  Conventionally, when a set of approximately 20 sheets is folded with a stitching / folding machine, a finished product having a clear curvature near the fold top is obtained. In this case, the booklet has a tendency to open, so it has an unattractive appearance and cannot be placed flat, making it more difficult to stack a large number of such booklets for storage and transportation. .

  In order to solve such a problem, a method and an apparatus are provided for squaring and folding a folded top portion of a sheet bundle so that the sheet is placed in a flat state after being processed.

Specifically, in the conventional sheet post-processing apparatus, the sheet bundle 101 discharged from the folding roller 107 with the folding top as the tip is temporarily stopped by the retractable stop plate 105 in the processing unit, and the vicinity of the folding top is detected. Grip members 102 and 103 are formed so as to form protrusions, and the pressing roller 104 for smoothing the curvature of the back is run along the longitudinal direction of the back to form a fold top shape in a square shape ( For example, see Patent Document 1.)
JP 2001-260564 A

  However, in the case of Patent Document 1, regardless of the number and state of the folded sheet bundle, the flat folding roller is used to press and squeeze along the protruding portion that is the top of the folding. . Therefore, there has been a case where the shape of the corner formed by the pressure contact is rounded and the corner is not formed with high quality.

  For this reason, the total thickness of the sheet bundle is increased, the storage and stacking performance is lowered, and it is difficult to stack a large number of bundles.

  The configuration of the sheet processing apparatus of the present invention for solving the above-described problems includes a means for gripping the folded top portion of the folded sheet bundle so as to protrude, and a section along the folded top portion for flattening the folded top portion. And a pressure contact means that travels in the form of a roller. The pressure contact means has a roller member having a substantially central portion protruding.

  Further, the sheet processing apparatus of the present invention has a means for gripping the folded top portion of the folded sheet bundle so as to protrude, and a pressure contact means for pressing the folded top portion to flatten the folded top portion, The press contact means includes a roller member having a convex shape at a substantially central portion, and the sheet bundle moves with respect to the fixed press contact means.

  Further, the sheet processing apparatus of the present invention includes a means for gripping the folded top portion of the folded sheet bundle so as to protrude, a pressure contacting means that travels along the folded top portion to flatten the folded top portion, and the pressure welding. A guide member that is provided on the upstream side in the travel direction of the means, moves with the travel of the press contact means, and regulates the thickness or position of the vicinity of the folded top portion of the sheet bundle during the press contact. .

  In addition, the sheet processing apparatus of the present invention includes means for gripping the folded top portion of the folded sheet bundle so as to protrude, and pressure contacting means for pressing the folded top portion to flatten the folded top portion. The sheet bundle is moved with respect to the fixed press contact means, and a guide member is provided for regulating the thickness or position of the vicinity of the folded top portion of the sheet bundle during the press contact.

  In the present invention, the pressure contact roller contact surface with respect to the folded portion of the sheet bundle is formed in a convex shape having a bulge in the vicinity of the center, and the roller or the sheet pressed by the roller is run to be squared. By making the fold, the corners become sharper.

  Furthermore, in the present invention, in order to restrict the movement of the protrusion in the vertical direction at the time of the pressure contact, on the upstream side in the running direction of the pressure contact roller so that the pressure contact roller stably comes into contact with the protrusion that is the folding top. By providing the guide member, it becomes possible to obtain a more stable corner folding quality.

(First embodiment)
Embodiments of the present invention will be described below with reference to the drawings.

  First, with reference to FIGS. 1 to 4, the conveyance of the sheet bundle and the configuration of the corner folding portion of the present invention will be described.

  In the sheet bundle processing apparatus 100, the conveyance rollers 1 and 2 that convey the folded sheet bundle, and the leading end side (folding top side) of the sheet conveyed by the conveyance rollers 1 and 2 are positioned and positioned. A tip stopper 7 for performing is provided. Further, the gripping means 4 and 5 that grip the sheet positioned by the leading end stopper 7 in a protruding state and the folding top of the sheet bundle gripped by the gripping means 4 and 5 are pressed against each other. A pressing roller 9 (shown in FIG. 4) for flattening is provided.

  An elastic sheet 6 such as rubber or sponge is provided on the contact surface of the gripping means 4 and 5 with the sheet bundle in order to alleviate scratches and marks on the sheet due to gripping. The pressure roller 9 has a convex shape having a bulge in the vicinity of the middle, and has a configuration in which the fold apex portion is pressed most strongly.

  The folded sheet bundle S is conveyed by the conveying rollers 1 and 2 from the right to the left with the folding apex as the tip as shown by an arrow a in FIG. 1 (FIG. 1). Then, the folded top portion is abutted against the leading end stopper 7, and the posture correction and positioning of the sheet bundle are performed (FIG. 2).

  Thereafter, in order to fix the stopped sheet bundle S, the gripping means 4 and 5 are operated to grip the sheet bundle (FIG. 3). In the present embodiment, the upper gripping means 4 descends to grip the sheet bundle with respect to the fixed lower gripping means 5, but the gripping means is not limited to this.

  After gripping, the tip stopper 7 is rotated and retracted from the vicinity of the folding top portion, and a protruding portion T is formed in which the folding top portion protrudes by the space between the gripping means 4 and 5 and the abutting portion of the tip stopper.

  In FIG. 4, the pressing roller 9 travels along the folding top portion so that the top portion is crushed with respect to the protruding portion T in FIG. The pressure roller 9 has a convex shape having a bulge in the vicinity of the middle, and has a configuration in which the fold apex portion is pressed most strongly.

  Further, in order to keep the amount of entry constant, a first flange 10 is provided and is configured to rotate while abutting against the side surfaces of the gripping means 4 and 5. In the present embodiment, the first pressure contact roller 9 and the first flange 10 are integrated, but may be separate.

  FIG. 5 shows corners formed by the pressure contact means using this embodiment. For comparison, FIG. 6 shows a corner formed by a flat pressure contact means which is a conventional technique.

  Comparing the two, the formed shapes are different, and the corners using this embodiment are formed sharper.

(Second Embodiment)
A second embodiment will be described with reference to FIG.

  FIG. 7 is a top view showing the corner folding state, and the configuration of the corner folding and the like are the same as those of the first embodiment described above. In the present embodiment, the squaring and folding unit 20 travels in the direction of the arrow b in the drawing along the folding top portion L of the protruding portion T formed by the tip stopper 7 and the gripping means 4 as in the first embodiment. Since they are different, different configurations will be described, and the same configurations as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

  The squaring unit 20 includes a pressure roller 9 for forming a corner fold with respect to the fold top L, and a flange 10 that is coaxial with the support shaft of the pressure roller 9 in order to keep the amount of entry constant. It is provided and is configured to rotate while being in contact with the gripping means 4 and 5. Here, it does not matter whether the pressure roller 9 and the flange 10 are integrated or separate.

  The taper guide 14 is a guide portion provided in the roller holder 8 on the upstream side in the running direction of the pressure roller 9 and fulfills a guide function for restricting the vertical movement of the protruding portion during pressure contact.

  The roller holder 8 is rotatably held with the equalizing support shaft 12 as a rotation axis with respect to the moving means 13 for running the pressure roller during corner folding, and is further elastically added to the folding top side by the equalizing spring 11. ing.

  FIG. 8 shows a pressure roller portion and a taper guide portion as viewed from the folding top portion side, which are arranged vertically so that the folding top portion can be guided to the pressure roller from above and below.

  The purpose is to reliably guide the pressure roller, and the shape and the like are not limited. By the upper and lower taper guides 14 and 15, the vertical inclination of the fold top portion between the gaps G is prevented, and a reliable corner fold is performed.

(Third embodiment)
A third embodiment will be described with reference to FIG.

  FIG. 9 is a top view of the corner folding portion. In the present invention, the press contact unit 23 is fixed, and the second embodiment is different from the second embodiment in that the sheet bundle is moved and the corner folding is performed with respect to the fixed press contact unit 21. The same components as those of the embodiment are denoted by the same reference numerals and description thereof is omitted.

  In order to move the sheet bundle with respect to the fixed pressure contact unit 21, the gripping means 4 and 5 move in the direction of arrow c in FIG.

  The following effects are achieved by the first to third embodiments described above.

  -Since the corners of the sheet bundle that has been folded with corners are formed with a rounder shape than before, a sheet bundle with improved quality can be obtained.

  -Since the corner portion of the sheet bundle that has been folded with corners is formed with a rounder shape than before, the overall thickness of the sheet bundle is reduced, and the stackability of storage is improved.

  Moreover, according to 2nd and 3rd embodiment, there exist the following effects further.

  ・ By providing a guide member on the upstream side in the running direction of the pressure roller that moves with the running of the pressure roller and restricts the vertical movement of the protrusion during pressure contact, more stable corner folding is possible. It becomes possible.

FIG. 3 is a front view showing sheet bundle conveyance and corner folding in the sheet processing apparatus according to the first embodiment of the present invention. FIG. 3 is a front view showing sheet bundle conveyance and corner folding in the sheet processing apparatus according to the first embodiment of the present invention. FIG. 3 is a front view showing sheet bundle conveyance and corner folding in the sheet processing apparatus according to the first embodiment of the present invention. 1 is a front view showing sheet bundle conveyance and corner folding in a sheet processing apparatus according to a first embodiment of the present invention. The figure which shows the sheet | seat bundle corner | angular part shape formed using the sheet processing apparatus which concerns on embodiment of this invention. The figure which shows the sheet | seat bundle corner | angular part shape formed using the conventional sheet processing apparatus. The top view of the sheet processing apparatus which concerns on the 2nd Embodiment of this invention. The side view which shows the press-contact means in the sheet processing apparatus which concerns on the 2nd Embodiment of this invention. The top view of the sheet processing apparatus which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Conveyance roller 3 Guide 4 Upper grip means 5 Lower grip means 6 Elastic member 7 Tip stopper 8 Pressure roller holder 9 Pressure roller 10 Flange 11 Equalize spring 12 Equalize spindle 13 Moving means 14, 15 Taper guide 20, 21 Cornering Folding unit 101, S sheet bundle 102, 103 Grip member 104 Pressure roller 105 Stop plate 106 Discharge roller 107 Folding roller
108 Output tray
T-fold protrusion
L Folding top
G Taper guide distance

Claims (4)

Means for gripping the folded top of the folded sheet bundle so as to protrude;
Pressing means that travels along the fold crest to flatten the fold crest, and
The sheet processing apparatus, wherein the press contact means includes a roller member having a substantially central portion protruding. Means for gripping the folded top of the folded sheet bundle so as to protrude;
Pressure contact means for pressing the fold top to flatten the fold top, and
The pressure contact means includes a roller member having a substantially central convex portion, and a sheet bundle moves with respect to the fixed pressure contact means. Means for gripping the folded top of the folded sheet bundle so as to protrude;
Pressure contact means that travels along the fold top to flatten the fold top;
A guide member that is provided on the upstream side of the pressure contact unit in the traveling direction, moves as the pressure contact unit travels, and regulates the thickness or position of the vicinity of the folded top portion of the sheet bundle at the time of pressure contact. A sheet processing apparatus. Means for gripping the folded top of the folded sheet bundle so as to protrude;
A pressure contact means for pressing the fold top to flatten the fold top,
A sheet processing apparatus comprising a guide member for moving a sheet bundle relative to the fixed press contact means, and for regulating a thickness or a position near a folding top portion of the sheet bundle during the press contact.

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