JP2014034143A - Inversely arched and rounded bookbinding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply manufacture a book with a book spine that is concavely and inversely arched and rounded.SOLUTION: An inversely arched and rounded bookbinding method includes: plasticizing a thermoplastic adhesive in a laminated block (1) with a book spine (1a) bound with the thermoplastic adhesive (2); causing a small opening (1b) side of the laminated block to face a receiving die (7) having a V-shaped groove (7a) extending in the vertical direction of the laminated block; pushing this small opening into the V-shaped groove; making a pressing die (8) having a curved surface (8a) extending in the vertical direction of the laminated block face a book spine side of the laminated block; forming an inverse arch while pressing the book spine of the laminated block with the curved surface; performing rounding by pushing the small opening of the laminated block into the V-shaped groove; and then removing the roundness rounded in the small opening of the laminated block.

Description

  The present invention relates to a method of manufacturing a book whose back is rounded into a concave shape.

  In a conventional wireless binding, the back is hardened with an adhesive to ensure the strength of the book. For this reason, there is a problem that the book is difficult to spread, and when it is opened widely, wrinkles are formed on the back and the appearance is impaired. In order to solve such problems, the back is rounded into a concave shape (reverse buckle), and then a polyamide-based hot melt adhesive with high elasticity is applied to the concave portion to improve the spread, A book that has been made difficult is proposed (for example, see Patent Document 1).

JP 2004-330700 A

  The conventional reverse bucket book has a problem that the bookbinding process is complicated and expensive because it requires special processing on the back and a special adhesive.

  Therefore, an object of the present invention is to provide a method by which the reverse bucket book can be easily manufactured.

  In order to solve the above problems, the present invention employs the following configuration.

  In addition, although the code | symbol with a parenthesis is attached | subjected in order to make an understanding of this invention easy, this invention is not limited to this.

  That is, the invention according to claim 1 plasticizes the thermoplastic adhesive (2) in the laminated block (1) in which the spine (1a) is bound with the thermoplastic adhesive (2), and the laminated block (1) The small block (1b) side of the laminated block (1) is opposed to the receiving mold (7) having a V-shaped groove (7a) extending in the vertical direction, and the small hole (1b) is made to correspond to the V-shaped groove (7a). The pushing die (8) having a curved surface (8a) extending in the vertical direction of the laminated block (1) is opposed to the back (1a) side of the laminated block (1), and the curved surface (8a) While pushing the back (1a) of the laminated block (1), reverse rounding is performed, and the fork (1b) of the laminated block (1) is pushed into the V-shaped groove (7a) and rounded out. After that, in the edge (1b) of the laminated block (1) To remove the Rumarumi out have been rounded to adopt a Gyakumaru look out binding method.

  As described in claim 2, in the reverse rounded bookbinding method according to claim 1, it is also possible to carry out the method by sandwiching the laminated block (1) from the front and back surfaces by a clamper (3). .

  As described in claim 3, in the reverse rounded bookbinding method according to claim 1, it is also possible to remove the roundness of the fore edge (1b) by cutting the laminated block (1).

  According to the present invention, the thermoplastic adhesive (2) in the laminated block (1) whose back (1a) is bound with the thermoplastic adhesive (2) is plasticized so that the laminated block (1) is vertically oriented. The receiving die (7) having an extending V-shaped groove (7a) is opposed to the small edge (1b) side of the laminated block (1), and the small edge (1b) is pushed into the V-shaped groove (7a). A pressing die (8) having a curved surface (8a) extending in the vertical direction of the laminated block (1) is opposed to the back (1a) side of the laminated block (1), and the laminated block is supported by the curved surface (8a). While pressing the spine (1a) of (1), reverse rounding is performed, and the fore edge (1b) of the laminated block (1) is pushed into the V-shaped groove (7a) to perform rounding. Rounded out at the edge (1b) of the laminated block (1) Because it is Gyakumaru seen out bookbinding method for removing roundness, it is possible to produce a book which is heading Gyakumaru the back (1a) in a simple manner.

It is explanatory drawing of the first half of a rounding-out process. It is explanatory drawing of the latter half of a rounding-out process. It is a figure which shows the detail of a rounding-out process.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  This reverse rounding bookbinding method is carried out through the following steps.

  (1) As shown in FIG. 1A, a laminated block 1 is prepared by stacking printed signatures or sheets and binding the spine 1a with a thermoplastic adhesive 2.

  This laminated block 1 may be wrapped with a cover, and the back of the cover may be bonded to the thermoplastic adhesive 2.

  (2) After the solidified thermoplastic adhesive 2 on the back 1a of the laminated block 1 is heated and plasticized, the laminated block 1 is sandwiched between the front and back surfaces by the clamper 3 as shown in FIG. . At this time, the laminated block 1 is preferably in a state where the spine 1a faces upward.

  Note that the thermoplastic adhesive 2 may be plasticized after the laminated block 1 is sandwiched between the clampers 3.

  The clamper 3 includes a pair of plate members 4 and 5 that sandwich the laminated block 1 and a screw fastener 6 that fastens the pair of plate members 4 and 5.

  The pair of plate members 4 and 5 have a width that allows the laminated block 1 with the spine 1a facing upward to be sandwiched from the front and back surfaces so that at least the spine 1a is exposed. Has a protruding length. Further, the plate members 4 and 5 may be supported by the operator by hand, but are desirably installed on a base (not shown) in order to improve workability.

  The screw fastener 5 is spanned between the pair of plate members 4 and 5 at locations where the pair of plate members 4 and 5 protrude from the top of the laminated block 1. The screw fastener 6 in the illustrated example is composed of a bolt 6a and a nut 6b, but may be of other configurations. When the plate members 4 and 5 are installed on the base, a piston / cylinder device may be provided instead of the screw fastener 6. By driving the piston / cylinder device with air or the like, the laminated block 1 can be fastened by the pair of plate members 4 and 5.

  The laminated block 1 is sandwiched between the pair of plate members 4 and 5 of the clamper 3 from the front and back surfaces thereof and is tightened by the screw fastener 6. Thus, the laminated block 1 is held in a vertical state with the back 1a up by the pair of plate members 4 and 5.

  (3) As shown in FIG. 1 (B), the laminated block 1 is attached to a receiving die 7 having a V-shaped groove 7a extending in the vertical direction of the laminated block 1 on the small edge 1b side of the laminated block 1 held by the clamper 3. The fore edge 1b side is opposed, and the pressing die 8 having a curved surface 8a extending in the vertical direction of the laminated block 1 is opposed to the spine 1a side of the laminated block 1.

  The receiving die 7 is a rectangular parallelepiped member that is slightly larger than the edge 1b of the laminated block 1, and has a length and a width V that allow the edge 1b of the laminated block 1 to be fitted into the surface corresponding to the edge 1b of the laminated block 1. A letter-shaped groove 7a is formed.

  This receiving die 7 does not need to be replaced even if the size of the fore edge 1b changes as the thickness of the laminated block 1 changes.

  The pressing die 8 is a columnar member having a curved surface 8 a having a curvature substantially corresponding to the reverse roundness provided to the spine 1 a of the laminated block 1. The pressing die 8 is not limited to a cylindrical shape, and may be a semi-cylindrical shape or may be a rectangular parallelepiped member formed with the curved surface 8a.

  The pressing die 8 can be exchanged according to the size of the reverse rounding provided to the spine 1a of the laminated block 1.

  (4) As shown in FIG. 3 (A), the curved surface 8a of the pressing die 8 is pressed against the spine 1a of the laminated block 1, and the curved surface 8a as shown in FIGS. 1 (C) and 3 (B). Then, while pressing the spine 1a of the laminated block 1, the back 1a is reversely rounded, and the fork 1b of the laminated block 1 is pushed into the V-shaped groove 7a of the die 7 and rounded to the fork 1b.

  In this case, the pressing die 8 may be struck against the spine 1a of the laminated block 1 once to several times.

  By pressing the laminated block 1 by the pressing die 8, the whole laminated block 1 moves to the receiving die 7 together with the plate members 4 and 5, as shown in FIG. The central portion on the back 1 a side of the stacked sheets of paper hits the top of the curved surface 8 a of the pressing die 8. Further, the two slopes in the V-shaped groove 7a of the receiving die 7 hit both side portions on the small edge 1b side of the stacked block 1 in which the signatures or sheets are stacked. Along with this, the signatures or sheets of the stacked blocks 1 in which the signatures or sheets are stacked, from the both sides on the spine 1a side to the center portion, are slipped between adjacent ones while the receiving mold 7 Move to. Finally, reverse roundness and roundness corresponding to the curved surface 8a of the pressing die 8 are respectively formed on the back 1a side and the fore edge 1b side of the signature or sheet of the laminated block 1.

  (5) As shown in FIG. 2 (D), the pressing die 8 and the receiving die 7 are pulled away from the laminated block 1, and the clamper 3 is removed from the laminated block 1 as shown in FIG. 2 (E). At this time, the thermoplastic adhesive 2 has already been solidified by air cooling or the like, so that the reverse rounded shape of the spine 1a of the laminated block 1 is maintained without breaking.

  (6) As shown in FIG. 2 (F), the roundness of the edge 1b in the laminated block 1 is removed. This roundness can be removed simultaneously with cutting the top of the laminated block 1 when the laminated block 1 is cut by a cutting machine such as a three-way cutting machine (not shown). Moreover, when not cutting with a cutting machine, it is also possible to remove by milling.

  The laminated block 1 in which the spine 1a is reversely rounded and the fore edge 1b is flattened is then sent to another desired process and processed.

  (7) When performing reverse rounding on the spine 1a of the other laminated block 1, it is sufficient to replace the pressing die 8 having the curved surface 8a corresponding to the curvature of the reverse rounding with the previous one. The clamper 3 and the receiving die 7 can be used as they are. After the pressing die 8 is replaced, the reverse rounding operation can be performed immediately.

  In addition, this invention is not limited to the said embodiment, A various change is possible.

DESCRIPTION OF SYMBOLS 1 ... Laminated block 1a ... Back 1b ... Small edge 2 ... Thermoplastic adhesive 3 ... Clamper 7 ... Receiving type 7a ... V-shaped groove 8 ... Push type 8a ... Curved surface

Claims (3)

  Plasticizing the thermoplastic adhesive in a laminated block whose back is bound with a thermoplastic adhesive, with the small block side of the laminated block facing a receiving mold having a V-shaped groove extending in the vertical direction of the laminated block; The fore edge is pushed into the V-shaped groove, a pressing die having a curved surface extending in the vertical direction of the laminated block is opposed to the back side of the laminated block, and the back of the laminated block is pressed by the curved surface. Reverse rounding binding characterized by rounding out and rounding by pushing the edge of the laminated block into the V-shaped groove, and then removing the rounded roundness at the mouth of the laminated block Method.   2. The reverse round bookbinding method according to claim 1, wherein the method is carried out by sandwiching the laminated block from the front and back surfaces with a clamper.   2. The reverse round bookbinding method according to claim 1, wherein the rounded edge is removed by cutting the laminated block. 3.

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