JP2014012357A - Radio bookbinding method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently cool a hot melt adhesive applied to the back of a text block in radio bookbinding.SOLUTION: An application layer (3) of the hot melt adhesive melted in the back (1a) of a text block (1) is formed, and a cover (5) is supported by a cooling plate (6). The back (5a) of the cover (5) on the cooling plate (6) and the back (1a) of the text block (1) are made to adhere via the application layer (3), and the hot melt adhesive of the application layer (3) is simultaneously started to be cooled from above the back (5a) of the cover (5) by the cooling plate (6), and afterwards, is continuously cooled up to the temperature at which the hot melt adhesive exhibits predetermined adhesive strength.

Description

  The present invention relates to a method and an apparatus for binding a booklet.

  In the case of wireless binding, the hot melt adhesive is heated and melted on the back of the text block, which is a stack of signatures and sheets, and then the back of the cover is placed on the back of the hot melt adhesive coating layer. This is a bookbinding method that is pasted on the back of the book. However, the hot melt adhesive immediately after the cover sheet is pasted on the main text block cannot exhibit the desired adhesive strength because of its high temperature. Therefore, it is necessary to cool and solidify the hot melt adhesive to a temperature at which the hot melt adhesive exhibits a desired adhesive strength after the cover is attached to the main text block.

  Conventionally, as a method of cooling and solidifying a hot melt adhesive, a method of pressing a cooling plate against a hot melt adhesive coating layer from the back of the cover (for example, see Patent Documents 1 and 2) has been proposed. In addition, when using a cooling plate, air is introduced into the cooling plate from the inlet and cooled, and the cooled air is discharged from the outlet toward the back of the cover. There has been proposed a method in which a cooling plate is cooled by circulating water, and the cooled cooling plate is pressed against the coating layer of the hot melt adhesive from above the back of the cover (for example, see Patent Document 2).

JP 2003-246163 A JP-A-2005-324385

  There is a problem that it is difficult to efficiently cool the hot melt adhesive depending on the conventional method of pressing the cooling plate against the coating layer of the hot melt adhesive from the back of the cover after pasting the cover on the main text block.

  Therefore, an object of the present invention is to provide a method capable of cooling a hot melt adhesive more efficiently and increasing the production efficiency of the perfect binding.

  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, in the invention according to claim 1, the melted hot melt adhesive coating layer (3) is formed on the back (1a) of the main block (1), and the cover (5) is supported by the cooling plate (6). The back (5a) of the cover (5) on the cooling plate (6) and the back (1a) of the body block (1) are bonded together via the coating layer (3), and at the same time, the cooling plate According to (6), the hot melt adhesive of the coating layer (3) starts to be cooled from above the spine (5a) of the cover (5), and thereafter, to a temperature at which the hot melt adhesive can exhibit a predetermined adhesive strength. It is characterized by continuing cooling.

  As described in claim 2, in the perfect binding method according to claim 1, before bonding the spine (5a) of the cover (5) to the spine (1a) of the body block (1), You may make it cool to the temperature which can bond the hot-melt-adhesive of an application layer (3) by spraying a cooling wind on the application layer (3) of the spine (1a) of the said text block (1).

  As described in claim 3, it is also possible to cool the cooling plate (6) with a cooling liquid in the wireless binding method according to claim 1.

  Further, the invention according to claim 4 is a coating layer forming means (2) for applying a molten hot melt adhesive to the back (1a) of the main block (1), and a cooling plate (6) for supporting the cover (5). ) And the back (5a) of the cover (5) on the cooling plate (6) and the back (1a) of the main text block (1) are bonded via the coating layer (3). At the same time, the cooling plate (6) starts to cool the hot melt adhesive of the coating layer (3) from above the spine (5a) of the cover (5). Thereafter, the hot melt adhesive has a predetermined adhesive strength. A wireless binding apparatus that keeps cooling to a temperature that can be exhibited is adopted.

  As described in claim 5, in the perfect binding device according to claim 4, before bonding the spine (5a) of the cover (5) to the spine (1a) of the body block (1), Cooling air spraying means (4) which cools the hot melt adhesive of the coating layer (3) to a temperature at which the coating layer (3) can be bonded by spraying the cooling air (a) onto the coating layer (3) of the spine (1a) of the block (1). ).

  As described in claim 6, in the wireless binding apparatus according to claim 4, the cooling plate (6) can be cooled by a coolant.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to cool efficiently the hot-melt-adhesive apply | coated to the spine (1a) of a text block (1) in perfect binding, and to improve the production efficiency of perfect binding.

It is a front view of each process explaining the wireless binding method according to Embodiment 1 of the present invention. It is a perspective view of each process explaining the wireless binding method according to Embodiment 1 of the present invention. It is a graph which compares and compares the cooling time of the hot-melt-adhesive by the wireless binding method which concerns on Embodiment 1 of this invention, and the cooling time by a conventional method. It is a front view of each process explaining the wireless binding method according to Embodiment 2 of the present invention. It is a perspective view of each process explaining the wireless binding method according to Embodiment 2 of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1>
This wireless binding method is performed through the following steps.

  (1) As shown in FIG. 1 (A) and FIG. 2 (A), a text block 1 in which printed signatures or sheets are stacked is prepared, and the text block 1 has its spine 1a facing downward. In this way, the sheet is conveyed by being clamped by a clamper (not shown).

  (2) The molten hot melt adhesive is discharged from the discharge nozzle 2 toward the spine 1a of the text block 1 conveyed by the clamper, as shown in FIG. Thereby, the application layer 3 of the hot melt adhesive is formed on the back of the text block 1. The temperature of the hot melt adhesive immediately after application is about 120 ° C.

  The hot melt adhesive can be applied by bringing it into contact with the spine 1a of the main text block 1 running on a glue wheel rotating on the surface of the molten hot melt adhesive.

  As the hot melt adhesive, for example, a PUR (polyurethane reactive) type or EVA (ethylene vinyl acetate) type can be used.

  (3) As shown in FIG. 1 (B1), a horizontally extending cooling plate 6 supporting the cover 5 with a horizontal top surface stands by at a predetermined position. When the text block 1 gripped by the clamper arrives on the cooling plate 6, the text block 1 is temporarily stopped together with the clamper, and the cooling plate 6 is moved to the text as shown in FIGS. 1 (B2) and 2 (B). It rises toward the back 1a of the block 1. As a result, the spine 5a of the cover 5 is affixed to the hot melt adhesive coating layer 3 on the spine 1a of the main text block 1.

  At this stage, cooling of the hot melt adhesive by the cooling plate 6 is started.

  (4) The cooling plate 6 is provided with a cavity (not shown) so that a coolant such as water circulates, and is introduced so that the coolant can enter and exit the cavity as shown in FIG. 1 (B1). The pipe 6a and the discharge pipe 6b are connected. Water can be used as the coolant. The cooling liquid is introduced into the cavity from the introduction pipe 6a, discharged from the discharge pipe 6b to the outside of the cavity, cooled by a cooler (not shown), and then enters the cavity again to cool the cooling plate 6. The surface of the cooling plate 6 is cooled to about 18 ° C. by the circulation of the cooling liquid.

  As shown in FIGS. 1 (B2) and 2 (B), when the spine 5a of the cover 5 is pressed against the spine 1a of the main text block 1 by the cooling plate 6, simultaneously from above the spine 5a of the cover 5 by the cooling plate 6. The coating layer 3 is cooled. By the cooling action by the cooling plate 6, the hot melt adhesive of the coating layer 3 is cooled to 30 ° C to 50 ° C.

  As a result, the hot melt adhesive of the coating layer 3 exhibits a predetermined adhesive strength, the signatures or sheets are firmly bonded to each other at the spine 1a of the text block 1, and the spine 1a of the text block 1 and the cover 5 back 5a is firmly joined.

  According to the experiment of the present inventor, as shown in FIG. 3, the hot melt adhesive of the coating layer 3 was measured for the time from the start of coating to cooling to 30 ° C. The cooling plate could be shortened by about 5 seconds as compared with the method of cooling by applying the cooling plate from the back of the cover to the hot melt adhesive coating layer.

  (5) While the hot melt adhesive of the coating layer 3 maintains a sufficient adhesion capability, a pair of nip bars 7 are attached to the front cover and the back cover of the cover 5 as shown in FIG. In the vicinity of 5a, it is pressed toward the body block 1 side, and the front cover and the back cover are folded toward the body block 1 side as shown in FIG. 1 (B3).

  (6) The text block 1 wrapped with the cover 5 is then trimmed in the top and bottom with a three-way trimming machine or the like and arranged as a wireless binding.

<Embodiment 2>
The wireless binding method according to the second embodiment is performed through the following steps.

  (1) As shown in FIG. 4 (A) and FIG. 5 (A), a text block 1 in which printed signatures or sheets are stacked is prepared, and the text block 1 has its spine 1a facing downward. In this way, the sheet is conveyed by being clamped by a clamper (not shown).

  (2) The molten hot melt adhesive is discharged from the discharge nozzle 2 toward the spine 1a of the main text block 1 conveyed by the clamper, as shown in FIG. Thereby, the application layer 3 of the hot melt adhesive is formed on the back of the text block 1. The temperature of the hot melt adhesive immediately after application is about 120 ° C.

  The hot melt adhesive can be applied by bringing it into contact with the spine 1a of the main text block 1 running on a glue wheel rotating on the surface of the molten hot melt adhesive.

  As the hot melt adhesive, for example, a PUR (polyurethane reactive) type or EVA (ethylene vinyl acetate) type can be used.

  (3) As shown in FIGS. 4B and 5B, cooling air a is blown toward the spine 1a of the text block 1 conveyed by a clamper (not shown). In the figure, reference numeral 4 denotes a nozzle which is cooling air blowing means.

  By blowing the cooling air a, the hot melt adhesive applied to the spine 1a of the main text block 1 is cooled to about 70 ° C to 80 ° C. This cooling is performed to such an extent that the bonding ability is not hindered.

  (4) As shown in FIG. 4C1, a horizontally extending cooling plate 6 supporting the cover 5 with a horizontal top surface stands by at a predetermined position. When the text block 1 held by the clamper arrives on the cooling plate 6, the text block 1 is temporarily stopped together with the clamper, and the cooling plate 6 is moved to the text as shown in FIGS. 4 (C2) and 5 (C). It rises toward the back 1a of the block 1. As a result, the spine 5a of the cover 5 is affixed to the hot melt adhesive coating layer 3 on the spine 1a of the main text block 1.

  At this stage, although the hot melt adhesive is cooled, it retains sufficient adhesion capability, so that the spine 5a of the cover 5 is firmly adhered to the spine 1a of the body block 1.

  (5) The cooling plate 6 is provided with a cavity (not shown) so that a coolant such as water circulates, and is introduced so that the coolant can enter and exit the cavity as shown in FIG. 4 (C1). The pipe 6a and the discharge pipe 6b are connected. Water can be used as the coolant. The cooling liquid is introduced into the cavity from the introduction pipe 6a, discharged from the discharge pipe 6b to the outside of the cavity, cooled by a cooler (not shown), and then enters the cavity again to cool the cooling plate 6. The surface of the cooling plate 6 is cooled to about 18 ° C. by the circulation of the cooling liquid.

  As shown in FIGS. 4C2 and 5C, when the back 5a of the cover 5 is pressed against the back 1a of the body block 1 by the cooling plate 6, the cooling plate 6 simultaneously lifts the back 5a of the cover 5 from above. The coating layer 3 is cooled. By the cooling action by the cooling plate 6, the hot melt adhesive of the coating layer 3 is cooled to 30 ° C to 50 ° C.

  As a result, the hot melt adhesive of the coating layer 3 exhibits a predetermined adhesive strength, the signatures or sheets are firmly bonded to each other at the spine 1a of the text block 1, and the spine 1a of the text block 1 and the cover 5 back 5a is firmly joined.

  According to the experiment of the present inventor, when the time from the start of coating to cooling to 30 ° C. was measured for the hot melt adhesive of the coating layer 3, it was compared with the conventional cooling method using only a cooling plate. It could be shortened by about 5 seconds.

  (6) While the hot melt adhesive of the coating layer 3 retains sufficient adhesive ability, a pair of nip bars 7 are attached to the front cover and back cover of the cover 5 as shown in FIG. In the vicinity of 5a, it is pressed to the body block 1 side, and the front cover and the back cover are folded to the body block 1 side as shown in FIG. 4 (C3).

  (7) After that, the text block 1 wrapped with the cover 5 is trimmed in the top and bottom by a three-way trimming machine or the like and arranged as a wireless binding.

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

DESCRIPTION OF SYMBOLS 1 ... Text block 1a ... Back 3 ... Coating layer 4 ... Nozzle 5 ... Cover 5a ... Back 6 ... Cooling plate a ... Cooling air

Claims (6)

  A coating layer of melted hot melt adhesive is formed on the back of the body block, the cover is supported by a cooling plate, and the back of the cover on the cooling plate and the back of the body block are bonded together via the coating layer. At the same time, the cooling plate starts cooling the hot melt adhesive of the coating layer from the back of the cover, and then continues to cool to a temperature at which the hot melt adhesive can exhibit a predetermined adhesive strength. A feature of a perfect binding method.   2. The method of binding a booklet according to claim 1, wherein before the spine of the cover is adhered to the spine of the text block, a cooling air is blown to the spine coating layer of the text block to apply a hot melt adhesive for the coat layer. Cooling and binding to a temperature capable of bonding.   2. The method according to claim 1, wherein the cooling plate is cooled by a cooling liquid.   A coating layer forming means for applying a melted hot melt adhesive to the back of the main text block; and a cooling plate for supporting the cover, wherein the back of the cover on the cooling plate and the back of the main text block are the application layer. At the same time, the hot melt adhesive of the coating layer is started to cool from the back of the cover by the cooling plate, and thereafter the temperature until the hot melt adhesive can exert a predetermined adhesive strength. A wireless binding apparatus characterized by continuing to cool.   5. The bookbinding apparatus according to claim 4, wherein before the back of the cover is bonded to the back of the text block, cooling air is blown to the back of the text block to apply a hot melt adhesive for the coating layer. A wireless binding apparatus comprising cooling air blowing means for cooling to a temperature capable of bonding.   5. The bookbinding apparatus according to claim 4, wherein the cooling plate is cooled by a cooling liquid.

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