JPS5996995A - Back pasting working method of book by foaming type hot meltand its device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bookbinding method and apparatus for attaching a book cover using foam-type hot-nodmelt.

Conventionally, hot melt adhesives have often been used as adhesives for attaching covers to the backs of books. These attachments involved applying hot melt to the back and then attaching a cover to the core. A side view of an example of these devices is shown in FIG. Inside the hot melt melting tank 11, there is pelletized hot melt HMo.
is put into the tank and heated and melted by the heater 12 provided at the bottom of the tank. The molten hot melt HM
The lower part of the transfer roll 4 is immersed near the liquid surface of g, and a part of the molten hot melt adheres to the surface of the transfer roll, and then rotates up (HM,,'') and at its top position, The molten hot melt nM, ;' adhering to the surface of the transfer roll is brought close to the back Bb of the book content B that is moving in the horizontal direction "A", and the molten hot melt is applied onto the back of the book. This allows the transfer (HM) to be performed.

In addition, the contents B of the book are chucked one by one by the chuck plate 1.2, and since the chuck plate is moved endlessly and continuously by a cheeper (not shown), the back Bb of the book contents B is It is continuously brought close to the transfer roll 4 and molten hot melt is adhered (HM). Immediately after that, the thickness is adjusted to the required thickness by the doctor roll 6, and after the appropriate amount of the molten hot melt is applied, a flat conveyor belt 16 runs from below the moving chuck plate, and the chuck is It merges with the back surface of the book that is running, and travels in the same direction and at the same speed. A cover C' is placed on the flat belt conveyor in advance at a proper position, and at the above-mentioned merging position, the cover C is pressed against the spine of the book B'' by a pressure plate 15 located below the flange 1-belt conveyor 16. is pressurized (Pl) and bonded via hot melt HM''.

The above is the conventional method of adhering the cover to the back of the book's contents using true melt.

However, recently, foamed hot melts have been attracting attention in place of real melts as adhesives for attaching covers in the bookbinding process.

Originally, foamed hot melt adhesives are unvulcanized com-based, saturated polyester-based, polyamide-based, polyolefin-based, and polyolefin-based copolymers or modified products thereof, and among these hot melt adhesives, air or N2.
It is a product in which gas such as CO2 is mixed in as countless closed cells, and the volume of the gas is necessarily expanded to about 1.5 to 5 times. In addition, these characteristics include not only maintaining the original adhesiveness, but also reducing the amount of raw material adhesive due to a decrease in specific gravity, decreasing the apparent viscosity under high pressure in the applicator, and reducing the amount of adhesive used after dispensing. Liquidity(
thixotrophic properties), thinning of the adhesive layer by pressure bonding and expansion of its bonding area, resulting in shorter bonding time, improved adhesion to porous and rough surfaces, and rapid cooling of the surface. It has many advantages in terms of adhesive processing, such as expansion of low-temperature applications, increased elasticity, improved sealing performance, extended work open time, and overall cost reduction.

The results of experiments have shown that foamed Honmelt has the above-mentioned properties and exhibits various effects when used as an adhesive for the back of the book's contents during the bookbinding process. It has become clear. In other words, the foamed hot melt permeates into the minute gaps between each paper sheet, the adhesive layer becomes thinner, and the fluidity after dispensing is low, so a so-called stringy phenomenon occurs when dispensing is interrupted. The book has less elasticity, the open time becomes longer, and the cent time becomes shorter.The book has elasticity not only in the work process, but also in the book opening and body after it is bound, so it is difficult to handle the book. It has been found that it has many advantages as well. A more specific list of these effects is as follows.

(1) For books bound using conventional hot melt, the hot melt solidifies into a plate shape, and when the book is opened,
The gutter of each sheet becomes difficult to open flat. When a foaming type hot melt is used, the spine of the book's contents, that is, the adhesive has elasticity, making it easier to open the gutter flat.

(2) In item (1) above, if the gutter hardened by the hot melt is forced flat by hand, the real melt solidified into a plate shape on the back of the book will spread out onto the opened sheet of paper. It may peel off at the binding and crack into strips. The foam-type hot-melt ones are elastic, so they don't break, and when you close the book, they return to their original shape.

(B) As in items (1) and (2) above, in the case of foam-type phon 1-melt, the gutter of each sheet can be opened flat, so the printing space can be expanded accordingly.

(4) When you open a book bound using conventional hot-melt method with the paper grained in the opposite direction (side grain), the spine of the book's contents is hard, so the gutter area Horizontal wrinkles occur, but because of the elasticity of the foamed hot melt, it adapts to each paper sheet and does not cause horizontal wrinkles.

(5) The amount of adhesive used for foam hot melt is about 1/1 that of conventional hot melt! ~14 hours, greatly contributing to cost reduction and energy saving.

(6) When using foam hot melt, the open time is about 50% longer than conventional hot melt, but on the other hand, the set time for crimping etc. is shortened, which reduces production speed. It will contribute to Nobu.

The above are the new effects obtained when foamed hot melt is used as an adhesive in bookbinding, and this is the reason why the use of foamed hotmelt in bookbinding has attracted attention.

As mentioned above, foamed hot melt has many advantages as an adhesive for the back of a book, but the conventional hot melt roll transfer device cannot be used in the application process. The reason is that the microbubbles in the foamed pot melt are destroyed mechanically and over time, and the original properties of the foamed hot melt are lost. Also, if the back of the book is wide (thick), a larger amount of foamed Honmelt must be applied capacitively to these bonded areas (to provide strength).

This is particularly effective when the thickness is 15 mm or more.

Furthermore, in order to increase the adhesion strength as described above, it may be necessary to apply the adhesive separately to the spine of the book's contents and the back of the spine of the cover. The reason for this is that by applying adhesive to both sides, you can apply more adhesive, and also because the paper quality of the book's contents and the paper quality of the cover are different, by using an adhesive that is compatible with them. This is because the adhesion strength can be further increased. In this case, the effect is further improved by using a foamed hot-melt adhesive as the adhesive.

An object of the present invention is to apply a foaming hot melt to each adhesive part and press the applied parts to each other when attaching a cover to the back of the book. To provide a method and device for increasing the adhesion strength of a cover.

First, the method according to the present invention will be explained. Since the present invention consists of six parts, each part will be explained separately.

1) Method of applying foaming hot melt to the back of the book contents Please refer to Figure 2. The contents of the book B1 are chaff board 21.
22 and moves continuously on a straight line, as in the conventional case. Further, it is also similar to the conventional method that a transfer roll 24 is provided below it. However, the transfer roll is not provided with a conventional melting tank, but instead includes a foaming hot melt nostle 65 and its discharger 66,
A foaming type H-71-melt applicator 40 or the like is provided, and the nozzle is oriented in the rotational direction 'IE' of the transfer roll rotating in the same direction as the traveling direction 'IA' of the chuck plate, and as far as possible. It is provided for the upper part of the transfer roll. As a result, the foamed hot melt l-FMo discharged from the nozzle is placed on the surface of the transfer roll 24, rotates in the direction of travel of the back of the book, approaches the back of the book B, b, The foamed Honmelt is fully transferred onto the back surface (FM). After that, as in the case of conventional hot melt, the pasting of the cover is sent to the process (direction \A11).

2) Method of dispensing foamed hot melt onto the back of the back of the cover Please refer to FIGS. 6 and 4. The covers are pulled out one by one from the cover take-off device, and an electric detector 51 senses the cover C1 as it moves on the feeding flat belt conveyor 46, which is then sent to the electromagnetic valve 48 via an amplifier 52. , operate the pneumatic operation valve 47 directly connected to it, and open the on-off valve in the discharger 46 directly connected to it to spray the foamed hot melt onto the cover C1.
Dispense (FMI) on top. In this way, the cover sheet Cζ, which has been discharged in the form of a strip of foamed hot melt (FM,'), moves in the direction B〃. At the same time, the contents B1 of the book chucked on the lines described in item 1) above, that is, the chuck plates 21 and 22, travels with its backs B and b facing downward (uA direction), The dispensing part of the foamed hot melt and the dispensing part of the foamed hot melt on the back side of the cover described in this section move closer to each other.

3) How to attach the cover to the back of the book contents Please refer to Figure 5. Since Kempo is almost the same as the conventional hot-melt cover pasting method, this will be briefly explained. The flow directions 11 to 13LL of the flat belt conveyor 46 in the above item 2) approach the flow direction \\A of the chuck plate in the above item 1), merge with each other at a certain necessary interval \\d, and flat Pressure P2 is applied from below the belt conveyor 86 via a pressure plate 96. The foamed hot melt applied to the spine of the book and the foamed hot melt applied to the back of the spine of the cover are pressed against each other (M4).
In one piece, the cover is glued to the spine of the book's content. At this time, according to this method using the foamed hot melt, both the backs have a larger bulk volume than the conventional hot melt. The melt not only sufficiently permeates into the spine of the book, that is, the throat, but also extends to both sides of the throat, and the cover is bonded to the book so that it wraps around the spine of the book.

Next, the apparatus according to the present invention will be explained.

As before, the explanation will be divided into six parts. First, let's talk about the structure. Please refer to FIG.

1) Apparatus for applying foam hot melt to the back of book contents The chuck plate 2122 that chucks the contents of the book is of the upright type as in the past, and a chino is attached (not shown in the drawing), and is connected to the chino 1 drive device. ing. A transfer roll 64 is provided below the chuck plate as in the conventional case, but the hot melt melting tank has been removed, and in its place is a discharge device 76 for discharging the foaming type phone 1 and its nozzle 75. is provided facing in the same direction as the rotational direction of the transfer roll 64 and as close to the top of the surface as possible. The discharge device 76 is connected to a foaming hot melt applicator n through a heat-resistant and pressure-resistant hose n. The opening/closing valve in the discharger is a pneumatic operating valve 77, which is connected to an operating air OA source, and the pneumatic operating valve is operated by a solenoid valve 78, and an electric detector 81 is used to operate the pneumatic operating valve. electrically connected to.

S) Apparatus for dispensing foaming hot melt onto the back of the back of the cover Please refer to FIG. 5. A foaming type real melt nozzle 65 is provided at a proper position above the running surface of the flat held conveyor 86 for transporting the cover, and this nozzle is directly connected to the discharger 86 and is used to operate the on-off valve in the discharger. The pneumatic operating valve 87 is further directly connected to a solenoid valve 88 for operating the pneumatic operating valve, and the solenoid valve is electrically connected via an amplifier to an electric detector 91 provided at an appropriate position. There is.

The discharge device 86 is connected to a foaming hot melt applicator through a heat-resistant and pressure-resistant hose 89, and the pneumatic operating valve 87 is connected to an operating air pipe 94.

On the other hand, the start portion of the flat belt conveyor for transporting the cover is connected to a cover pickup device 82.

3) Apparatus for attaching the cover to the back of the book contents Please refer to Figure 6. This apparatus is almost the same as a conventional cover pasting apparatus using Botmelt, so a brief explanation will be provided. That is, after the confluence of the running line of the chuck plate and the running line of the flat belt I conveyor for transporting the cover sheet, an upward pressure plate 96 is provided below the flat belt conveyor 83, and then a 1V"-shaped guide Board 97
, followed by a pressure roll 98A that pinches both sides of the book's gutter.

98B etc. are provided.

Next, the operation of this device will be explained. As mentioned above, the explanation will be divided into six sections and explained in sequence.

1) Please refer to Figure 5. The chuck plates 61 and 62 chuck the back B2b of the book content B2 downward and move continuously in the horizontal direction 11ALJ. and 100℃
The transfer roll heated to ~200° C. is brought close to the back of the book and rotated by a drive device (not shown in the drawing) in the same direction as the horizontal direction “A”.

The electric detector 81 detects the position of the back of the moving book, and the electromagnetic valve 78 is activated via the amplification device.
is actuated to open the on-off valve in the discharger via the pneumatic operation valve 77, and the foamed hot melt, which is pumped through the heat-resistant and pressure-resistant hose from the foamed hono I melt applicator, is discharged from the nozzle 75. The discharged foamed honotomel I-FMo is placed on the surface of the rotating transfer roll 64,
The same direction as the movement direction of the back of the book's contents ``A'' 1
E", at a point close to the transfer roll 64 and the back B2b, the foamed Hola 1-Mell-FMo is
Everything is transferred (FM2) onto the spine of the book. As the book continues to move further, the end of the back of the book is detected by the electric detector 81.
When passing the position, an N-cut signal is sent, and contrary to the above, the on-off valve in the discharger is closed, and the discharge of the foamed hot melt to the transfer roll is stopped. As a result, a foamed hot melt corresponding to the length of the spine of the book's contents is discharged onto the transfer roll surface and is transferred and coated onto the spine surface. The discharge amount, that is, the coating amount is adjusted by adjusting the discharge device 76 and the foamed hot melt applicator. In this way, the back B2b of the content B2 of the above book is
After coating the book, wait for the contents of the next book to arrive. When the contents of the book are chucked by the chuck plate and arrive at the movement line of the chuck plate, the electric detector 81 senses it again as before, sends a signal, and opens the on-off valve in the discharger. Dispense foamed hot melt onto the transfer roll surface,
Repeat the same operation. The contents of the book, onto which the back of the book has been transfer-coated with the foamed hot melt, are moved in the 'A' direction while being gripped by the chuck plate.

C) On the other hand, in parallel with the above-mentioned application of the foamed hot melt to the spine of the book, the foamed hot melt is applied to the back of the spine of the cover. Please refer to FIG. The covers are pulled out one by one from the cover take-off device 82, and an electric detector 91 senses the cover C as it moves on the flat-held conveyor 86. 88, operate the pneumatic operation valve 87 directly connected to it, and open the on-off valve in the discharger 86 directly connected to it to discharge the foaming hot melt onto the cover q'(FM3' )do.

In this way, the foamed hot melt is sprayed onto strips of foamed hot melt (FM).
3) The covered cover C; moves in the 11BLL direction.

3) Regarding the flow of the contents of the book “A” coated with the foamed hot melt on the back mentioned in item i) above, the above
As shown in FIG. 6, the flow XB of the cover sheet with the foamed hot melt discharged thereon gradually approaches 5 (FIG. 7), and is finally guided by the guide roll 95. They flow parallel to each other with a certain predetermined interval tVd. The spacing depends on the pressure plate 96 provided below the Frandheld conveyor 86 mentioned in item C) above, and it also depends on the thickness of the cover and the thickness of the adhesive layer of the foamed Honmelt. It is added. In the case of foamed Botmelt, the expansion volume increases several times, so
A relatively large amount (in terms of volume) compared to the case of pot melts.
Since foamed hot melt, i.e. adhesive, is being sprayed,
When these are crimped together, the foamed Honmelt protrudes from both sides of the spine of the book, ie, both sides of the gutter (FM4), as shown in FIG.

This can be seen in the next step of folding the cover (Fig. 9) and pressing the gutter on both sides (Fig. 10).
The gutter B2bs of the cover cX is bonded to increase the bonding strength of the cover. In this way, the contents of the book with the cover pasted are completed in binding (B") and are discharged outside the machine (Bc, FIG. 11).

As described above, according to the method and apparatus of the present invention, foamed hot melt is applied and sprayed on both the back of the book's content and the back of the back of the cover, and by bonding them together, the strength is increased. It is possible to process the binding of the dog cover, and it is possible to obtain a book with a remarkable effect, especially for books with a thickness of 15 mm or more.

[Brief explanation of drawings]

FIG. 1 is an explanatory side view of a conventional method for attaching a cover to the back of a book and its apparatus. FIG. 2 is a side view illustrating a method of applying foamed hot melt to the back of a book according to the present invention. FIG. 6 is a side view illustrating a method for dispensing foamed hot melt onto the back of the back of a book cover according to the present invention. FIG. 4 is a plan view of FIG. 6. FIG. A side view of a method and apparatus for dispensing foamed hot melt on the back surface of the back, joining the sprayed portions of both foamed hot melts, and adhering them. FIG. 6 shows the contents of the book according to the present invention. 7 is a sectional view taken along line E-E in FIG. 6. FIG. 8 is a sectional view taken along line FF in FIG. 6. Figure 9 is a sectional view taken along line G-- in FIG. 6. G sectional view FIG. 10 is a HH sectional view in FIG. 6 FIG. 11 is an I-I sectional view in FIG.・
・Transfer 0-/l/ 5.25... Heater for transfer roll 6... Doctor roll 7... Doctor knife 11... Real melt melting tank 12... Heater for same as above 13, 43... Frant belt competition 7
15.56...Pressure plate 26...Scraper 3
5.45... Nozzle 36.46. Discharge device 37,
47... Pneumatic operation valve 38, 48... Solenoid valve 40.50... Foaming type phone 1-melt applicator 41, 51... Electric detector 55... Gytrol 60.1 \V-shaped Chi F plate 62A. 62B...Pinch rollers on both sides 11ALr...Driving direction of chuck plate 11BII...Driving direction of flat held conhair for cover page B. , B,, B2... Contents of the book B, b , B2b... Back of the book's contents B2bs Both sides of the back of the book's contents (gutter part)
Bc... Binding C, C,, C2... Cover Patent Applicant Nordson Co., Ltd. Procedural Amendment (Method) June ZZ Day 1, 1982, Incident Indication 1981 Patent Application No. 207421 2, Invention Name Name of book back pasting method and device using foamed hon-melt 6; Relationship with the case of the person making the amendment Patent applicant address 410-74 Minamidai, Honmongawa-ku, Tokyo, 140, subject of amendment (1) (2) [Drawings] 5. Details of the amendments are as shown in the attached sheet. There are no changes to the engravings of the specifications and drawings. (1) Submit and print one copy of the detailed statement as shown in the attached sheet. (2) We will submit one official drawing as shown in the attached sheet.

Claims (1)

[Scope of Claims] 1) In the step of applying adhesive to the back of the contents of the book in bookbinding work, the molten foam pot melt is once applied to the transfer roll 2 through a nozzle 65 attached to a discharger 66.
2) A method of discharging an appropriate amount corresponding to the length of the spine onto the back of the cover C5 and transferring it onto the back of the spine B, b via the transfer roll; Claim 1) A method of dispensing mold hot melt into strips (FM) from a nozzle 45 attached to a dispensing device 46;
By the method of Section 2) and Section 2), the back of the book contents B, b
and on the back of the back of the cover C1, respectively.
・It is characterized by: dispensing the melt in a strip at relatively close timing, making both of the dispensing portions FM′ and FM: face each other, and bonding them under pressure. A method for attaching book spines using foam hot melt. 4) In a roll-type transfer device for applying adhesive to the spine of a book that moves in the horizontal direction 11A11 on a line in a spine pasting device for bookbinding, the transfer rotates in the same direction “E” as the above-mentioned direction “A”. A foam hot melt nozzle 75 is provided on the rotating upward surface of the roll 64, and an electromagnetic valve 78 is provided to operate an open/close pneumatic operation valve 77 in a discharger 76 directly connected to the nozzle. , an application device using roll transfer of foamed hot melt which is electrically connected to the electric detector 81 on the back of the book contents; A downward nozzle 65 is provided in the section, and a solenoid valve 88 that operates a pneumatic operation valve 87 for an on-off valve in a discharger 86 directly connected to the nozzle is connected to an electric detector 91 and an electric sensor for the cover C'2. and 6) the running direction of the line where the respective lines in claims 4) and 5) merge together.'' A chuck plate 6 running on the line of item 4) above on
1'', 62'' is provided with a guide roller 95 for merging of the flat belt conveyor 86 running on the line of item 5) above, and after the guide roller, the lower surface of the flat belt conveyor 86 is provided. 7) Claim 4) A device for attaching a cover to the spine of the book content on the back of the book, which is provided with a pressure plate 96. The "electrical detector" described in the section is "consisting of a first-stage electric detector for the top and a second-stage electric detector for the end." 8) The "cover feeding device" described in claim 5) is "connected to the cover take-off device 82." 9) The "pressure plate" described in claim 6) is a "multi-row roller." 10) The single pressure plate or multi-row roller described in claim 9) is operated by a hydraulic pressure device, a spring pressure device, or a screw-type vertical adjustment device. What is 0