JP2001010250A - Method and apparatus for adhering and drying for bookbinding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save space by enhancing adhering and drying efficiencies, to stably and securely adhere a plurality of sheets by sufficiently impregnating the sheets with an adhesive component, and to obtain a finish having good touch while suppressing change of quality to a minimum. SOLUTION: A plurality of sheets 1 are laminated, and a vibration energy or a wave energy is given to a back surface 2a of a binding book 2 coated on the surface 3a with an aqueous adhesive 4 through a horn 8 for amplitude- enlarging a vibration of a vibrator 7 driven by resonance with a high-frequency power to be input from an ultrasonic oscillator 5. Thus, a containing moisture is removed by evaporating while impregnating with the adhesive component, and the plurality of the sheets can be adhered to each other and dried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for drying adhesives for bookbinding, and more particularly, to an aqueous adhesive (generally a spine) on a back surface of a binding body formed by laminating a plurality of printed sheets. After applying glue), or after applying a spine called marble to the adhesive-coated surface, the adhesive is dried to bond multiple sheets of paper to each other. The present invention relates to an adhesive drying method and an apparatus therefor.

[0002]

2. Description of the Related Art As this kind of bookbinding adhesive drying means, conventionally, a binding body formed by laminating a plurality of sheets is sandwiched by a clamper or the like while being transported, and a water-based adhesive is attached to the back surface of the binding body. After applying the adhesive, the adhesive-coated back surface is heated, for example, by blowing hot air generated by heat exchange with a high-temperature combustion gas of a gas burner to evaporate and remove moisture contained in the adhesive, thereby forming a plurality of sheets of paper. A method of bonding and drying the leaves to each other has been adopted.

[0003] As a bookbinding adhesive drying means, a method of heating and bonding the adhesive-coated back surface of a binding body with a high-frequency voltage to bond and dry the binding body has been conventionally proposed.

[0004]

However, among the above,
In the case of a conventional general adhesive drying method in which hot air is blown to heat the adhesive-coated back surface, the heat loss is large, the drying speed is low, and the dry bonding efficiency is very poor. Therefore, when a bookbinding process such as application of an adhesive, adhesive drying, and cooling is performed on a line, the line space required for adhesive drying is increased, and the entire bookbinding facility is easily increased in size. In addition, since it is heating and drying with hot air, to increase the drying speed, the higher the temperature, the faster the surface is rapidly dried and the hardness tends to increase as the adhesive component of the adhesive does not sufficiently penetrate. As a result, there is a problem that the adhesion between a plurality of paper sheets may become unstable and uncertain, and that the finished surface tends to have a poor texture.

On the other hand, in the case of the adhesive drying method using high-frequency heating, the usable high-frequency voltage is limited to a high-frequency voltage in a range that does not cause sparking between the electrodes. However, the line space of the bookbinding process is still large.
In addition, since it is high-frequency heating, sufficient permeability of the adhesive component cannot be expected, and the bonding becomes unstable and unreliable, and the distance between the clamper and the back surface of the binding member increases,
Opening of the bonding surface occurs. As a result, the texture is deteriorated on the finished surface, and the difficulty in using hot air cannot be solved at all.

The present invention has been made in view of the above circumstances, and not only can the work environment be improved, but also the efficiency of adhesive drying can be increased to save space, and a plurality of sheets can be obtained by sufficiently penetrating the adhesive component. An object of the present invention is to provide a bookbinding adhesive drying method and apparatus which can stably and surely bond paper sheets to each other and obtain a good texture.

[0007]

In order to achieve the above object, a method of bonding and drying for bookbinding according to the present invention comprises applying a water-based adhesive to the back surface of a binding body formed by laminating a plurality of paper sheets. It is characterized in that a plurality of paper sheets are mutually bonded and dried by applying ultrasonic vibration energy or wave energy to the adhesive applied back surface of the binding body to evaporate and remove water, and The bookbinding adhesive drying apparatus according to the present invention is formed by laminating a plurality of paper sheets, and electrically connected to an ultrasonic oscillator on a transport path of a binding body coated with an aqueous adhesive on the back surface. Place the ultrasonic transducer,
A horn for expanding the amplitude of the vibration of the ultrasonic vibrator is provided on the back surface of the adhesive body on which the adhesive is applied, and vibration energy or wave energy is applied to the back surface of the adhesive application of the bound body via the horn. The present invention is characterized in that paper sheets are bonded and dried with each other.

According to the present invention, by applying ultrasonic vibration energy or wave energy to the adhesive applied back surface of the binding body, the aqueous adhesive applied to the binding body back surface is sufficiently directed toward the inside of the binding body. Moisture can be evaporated and removed within a short period of time with almost no rise in temperature while allowing the permeation to occur, thereby increasing the drying speed and significantly improving the adhesive drying efficiency. As a result, when the bookbinding process is made into a line, the line space required for bonding and drying can be small, and not only can the size of the bookbinding facility be easily reduced, but also only the surface hardness becomes abnormally high because it is not heated and dried. And prevent the texture from being deteriorated due to the opening of the adhesive surface, and ensure that the adhesive components are sufficiently penetrated to securely and stably adhere multiple sheets so that they do not peel off when used. It is possible. Further, since there is no problem of exhaust gas due to the use of the gas burner and generation of oil vapor due to the use of the oil-based adhesive, the working environment can be improved.

In the above method and apparatus for bonding and drying for bookbinding, it is preferable to apply ultrasonic vibration energy or wave energy to the adhesive-coated back surface of the binding body in a non-contact state. The reason is that if it is a contact type, it can be applied to the case where a spine called marble is attached to the back of the binding body, but if the spine is not used, the adhesive applied at the tip of the horn may be scraped off This is because the method cannot be applied substantially to the adhesive drying of the binding body without using the spine.

It is preferable to use an ultrasonic oscillator having a drive frequency set in the range of 10 to 60 kHz as the ultrasonic oscillator in the bookbinding adhesive drying apparatus. Drive frequency of ultrasonic transmitter is 6
When the frequency is 0 kHz or higher, the adhesive does not sufficiently penetrate into the inside of the binding body when vibration energy is applied, and the adhesive bonding force between the sheets is insufficient, so that peeling occurs when turning over the sheets. Conversely, if the driving frequency of the ultrasonic transmitter is less than 10 kHz, the adhesive may penetrate too deeply and the adhesive bonding width between the paper sheets may become excessively wide, resulting in a product that is difficult to turn. There is.

[0011] In the non-contact type bookbinding adhesive drying apparatus, the gap between the front end of the horn connected to the ultrasonic vibrator and the back surface of the binding member may be 1 to
Preferably, it is set to 20 mm.

Further, in the non-contact type bookbinding adhesive drying apparatus, in order to make the adhesive permeability proper, the amplitude of the horn is set to 20 μm.
It is preferably set to m or more. The reason is that if the amplitude of the horn is less than 20 μm, the adhesive cannot penetrate to a necessary and sufficient depth.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of a bookbinding adhesive drying apparatus used in carrying out the bookbinding adhesive drying method according to the present invention, and a binding body 2 formed by laminating a plurality of printing paper sheets 1. By a pair of clampers 3 attached to a belt conveyor or the like, the sheet is nipped from both sides in the stacking direction and is continuously conveyed in the direction of arrow a in FIG.

In the bonding zone set in the continuous conveyance path of the binding body 2, an aqueous adhesive 4 is applied to the entire back surface 2a of the binding body 2, and subsequently, the binding body 2 is placed downstream of the bonding zone. It is shifted to the drying zone set in the continuous conveyance path adjacent to the side.

In the drying zone, an ultrasonic oscillator 5 set at a driving frequency in the range of 10 to 60 kHz, and an electric oscillator that is electrically connected to the ultrasonic oscillator 5 through cables 6 and 6 and that is installed on the side of the transport path. It is composed of two ultrasonic vibrators 7, 7 for distortion, magnetostriction, etc., and a half-wave longitudinal resonance horn 8, 8 made of metal such as iron, duralumin, or titanium alloy for widening and expanding these ultrasonic vibrators 7, 7. By inputting high-frequency power from the ultrasonic oscillator 5 to the ultrasonic vibrators 7, 7, the ultrasonic vibrators 7, 7 are driven to resonate, and their longitudinal vibrations are amplified by the half-wavelength longitudinal resonance horns 8, 8. The configured bookbinding adhesive drying device A is installed.

The two half-wavelength longitudinal resonance horns 8 in the bookbinding adhesive drying apparatus A are juxtaposed in the conveying direction of the binding body 2 so as to be in close contact with each other.
Between the front end of the binding member 2 and the back surface 2a of the binding member 2 coated with the adhesive 4
A non-contact type is provided with a gap of 1 to 20 mm. The amplitude of the horns 8, 8 is set to 20 μm or more, preferably 40 μm or more.

When the binding body 2 moves to the drying zone in which the bookbinding adhesive drying device A having the above structure is installed, the binding body 2 has an adhesive-coated back surface 2a,
By applying ultrasonic vibration energy or wave energy having an amplitude of 20 μm or more, preferably 40 μm or more, through the horns 8 and 8 provided with a gap of 20 mm, the adhesive component of the adhesive 4 is bound inside the binding body 2. The water content is evaporated and removed within a short time with almost no temperature rise while sufficiently penetrating into a plurality of paper sheets 1.
Can be strongly adhered to each other and dried.

FIG. 2 shows that a spine 9 called marble is attached to the adhesive-coated back surface of the binding body 2 and then the ultrasonic vibration energy or the ultrasonic wave energy is applied to the adhesive-coated back surface 2a through the horns 8, 8 provided on the spine 9. An embodiment in which wave energy is applied is shown. In this case as well, the moisture content is shortened almost without increasing the temperature while the adhesive component of the adhesive 4 is sufficiently penetrated toward the inside of the binding body 2 as described above. A plurality of paper sheets 1... Mutually and the spine 9 can be strongly adhered and dried by being evaporated and removed in time.

FIG. 3 shows an embodiment in which the back surface 2a is applied to bond and dry the binding body 2 having a substantially arcuate shape. In this case, more than three (or more than four) binding members may be used. Using the sonic vibrators 7 and the horns 8, these three horns 8 are arranged so as to be mutually inclined so that vibration energy or wave energy can be applied to the entire area of the substantially arc-shaped curved back surface 2 a. , Again, as above,
By imparting vibration energy or wave energy through each horn 8..., The adhesive component of the adhesive 4 sufficiently penetrates into the inside of the binding body 2, and the water content can be reduced in a short time with almost no temperature rise. The plurality of paper sheets 1 can be strongly adhered to each other and dried by evaporation.

[0020]

As described above, according to the present invention, the aqueous adhesive is directed toward the inside of the binding body by applying ultrasonic vibration energy or wave energy to the back surface of the binding body coated with the adhesive. The moisture can be evaporated and removed within a short period of time with almost no rise in temperature while allowing sufficient permeation, thereby increasing the drying speed and significantly improving the adhesive drying efficiency. This makes it possible not only to reduce the line space required for adhesive drying when making the bookbinding process into a line, thereby reducing the size and space of the entire bookbinding facility, but also to increase the surface hardness only abnormally. In addition, while preventing the deterioration of the texture due to the occurrence of the opening of the bonding surface, the bonding component can be sufficiently penetrated to securely and stably bond a plurality of paper sheets without peeling when used. . In addition, since there is no problem of exhaust gas due to the use of the gas burner and no generation of oil vapor due to the use of the oil-based adhesive, there is an effect that the working environment can be improved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a bookbinding adhesive drying apparatus used in carrying out a bookbinding adhesive drying method according to the present invention.

FIG. 2 is an overall perspective view of a bookbinding adhesive drying apparatus showing another embodiment of the present invention.

FIG. 3 is an overall perspective view of a bookbinding adhesive drying apparatus showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printing paper leaf 2 Binding body 2a Back side of binding body 4 Water-based adhesive 5 Ultrasonic oscillator 7 Ultrasonic oscillator 8 Horn

Claims (7)

[Claims] 1. An aqueous adhesive is applied to the back surface of a binding body formed by laminating a plurality of paper sheets, and then ultrasonic vibration energy or wave energy is applied to the adhesive application back surface of the binding body to remove water. Bonding and drying a plurality of paper sheets with each other by evaporating and removing the paper sheets. 2. The bookbinding adhesive drying method according to claim 1, wherein ultrasonic vibration energy or wave energy is applied to the adhesive-coated back surface of the binding body in a non-contact state. 3. An ultrasonic vibrator electrically connected to an ultrasonic oscillator is disposed on a transport path of a binding body having a plurality of paper sheets laminated and having a back surface coated with an aqueous adhesive. A plurality of horns for increasing the amplitude of the vibration of the ultrasonic vibrator are provided on the back surface of the binding body where the adhesive is applied, and vibration energy or wave energy is applied to the back surface of the binding body where the adhesive is applied via the horn. Characterized in that the paper sheets are bonded and dried with each other. 4. The horn is provided with a gap between its tip and the adhesive-coated back surface of the binding body, and is configured to apply ultrasonic vibration energy or wave energy in a non-contact state. The bookbinding adhesive / drying apparatus according to claim 3, wherein: 5. The driving frequency of the ultrasonic oscillator is 10
4. The bookbinding adhesive drying device according to claim 3, wherein the adhesive drying device is set in a range of ６０60 kHz. 6. The bookbinding adhesive / drying apparatus according to claim 4, wherein a gap between the front end of the horn connected to the ultrasonic transducer and the back surface of the binding body is set to 1 to 20 mm. 7. The bookbinding adhesive / drying apparatus according to claim 4, wherein an amplitude of the horn connected to the ultrasonic transducer is set to 20 μm or more.