JP2002144754A - Drying device for spine pasting part for bookbinding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drying device for a spine pasting part for bookbinding which saves a space, enhances the penetrability of the adhesive component of paste into the interior of a layer and ensures a strong adhesive force with a small amount of the paste, with such other advantages that the device does not cause a change in the quality and dimension of paper leaves and realizes the adhesion and drying of a work in a short time. SOLUTION: The drying device for the spine pasting part for bookbinding comprises a primary drying device B of such a construction that an ultrasonic wave vibration is imparted to the spine surface 20a of the pasted work 20 through a resonant horn 30 of an ultrasonic vibrator 29 mounted facing the spine surface 20a and a secondary drying device C blowing warm air to the spine surface 20a of the work 20, arranged side by side in the direction where the work 20 is transferred.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for drying a back gluing section for bookbinding. For details, a glue portion coated with water-based glue (water-based adhesive) is dried on the back surface of a bookbinding workpiece formed by stacking and stacking a plurality of printed paper sheets to form a plurality of sheets. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying apparatus for a bookbinding back gluing section for adhering paper sheets to each other for continuous binding.

[0002]

2. Description of the Related Art As means for drying a back gluing portion of this kind, a means for evaporating water by blowing hot air or warm air toward the back surface of a workpiece has conventionally been employed. Was.

[0003]

However, in the case of such hot air or hot air drying means, not only the heat loss is large and the drying efficiency is very poor, but also hot air or hot air is used, Only the surface (the back side of the workpiece) dries rapidly without the adhesive component of the sheet penetrating deep into the paper layer, and as a result, the tensile strength of the bonded portion is reduced, and a predetermined adhesive force is obtained. Requires a large amount of glue. In addition, since the temperature of the workpiece rises remarkably, the quality of each sheet is altered and dimensional changes occur, so that the occurrence rate of defective products is high in the finished surface. Also, it is conceivable to improve the permeability of the adhesive component by spraying hot air having a lower temperature than the hot air in a plurality of stages and gradually evaporating the moisture, and reducing heat loss, In this case, there is a problem that the drying apparatus becomes very large and the space occupied by the drying apparatus becomes large, but difficulties in terms of finished products such as deterioration of paper sheets and dimensional changes cannot be solved.

[0004] The present invention has been made in view of the above-mentioned circumstances, and it is possible to increase the drying efficiency and to save space, increase the penetration of the adhesive component into the inside of the layer, and use a small amount of glue to obtain a strong adhesive force. The purpose of the present invention is to provide a drying device for a back gluing portion for bookbinding, which is capable of obtaining a good finished product by bonding and drying in a short time without causing deterioration or dimensional change of a paper sheet. I have.

[0005]

In order to achieve the above object, a drying apparatus for a back gluing section for bookbinding according to the present invention provides a bookbinding work in which a plurality of sheets are aligned and stacked. A drying device for a bookbinding back gluing unit that dries a glued portion coated with an aqueous glue on its back surface and transfers a plurality of paper sheets to each other by continuous binding while transporting the glued workpiece. On the back side, a resonance horn for widening and expanding the vibration of the ultrasonic vibrator is provided, and a primary drying device configured to apply ultrasonic waves to the aqueous paste through the resonance horn, and toward the back surface of the workpiece. A secondary drying device for blowing hot air is provided side by side in the transfer direction of the workpiece.

According to the present invention having the above structure, the ultrasonic glue is applied to the back surface of the workpiece through the resonance horn provided on the back surface of the workpiece after gluing, so that the aqueous glue applied thereto is applied to the aqueous glue. By applying high-speed vibration, the adhesive component of the glue penetrates deeply into the layers of multiple sheets to increase the tensile strength, and also blows out the saturated steam on the glue surface during drying to remove the moisture inside the glue applied by ultrasonic waves. It is possible to perform predetermined primary drying in a short period of time without causing deterioration or dimensional change due to temperature rise of each paper sheet by embossing on the surface by wave motion, and then performing paper drying by secondary drying by hot air blowing. It is possible to quickly and evenly dry the adhesive component that has penetrated deep into the leaf layer.

[0007] By combining the primary drying using ultrasonic waves and the secondary drying using warm air as described above, the drying efficiency can be increased and the space can be saved as compared with the drying using hot air or warm air alone. And a strong adhesive force is secured while using a small amount of glue, and a product with a good finish can be efficiently obtained without deterioration or dimensional change.

[0008] In the drying apparatus of the back gluing section for bookbinding according to the present invention having the above-mentioned structure, the ultrasonic vibrator constituting the primary drying apparatus may be arranged in the direction in which the workpiece is transported. It is desirable to install a plurality of them along. Further, the amplitude of the resonance horn for widening and expanding the vibration of the ultrasonic vibrator is 20 μm or more, preferably 40 μm or more, as described in claim 3, in order to optimize the permeability of the adhesive component of the adhesive. It is desirable to set. If the thickness is less than 20 μm, the adhesive component of the glue cannot be sufficiently penetrated deep into the paper sheet layer.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of an entire continuous bookbinding facility including a back glue drying device according to the present invention.
Fig. 3 is a schematic plan view of the same equipment, and Figs. 3 and 4 are longitudinal sectional side views of main parts (a back gluing device and a drying device), respectively. Slat type conveyor D to be transferred and this conveyor D
Back gluing device A, a primary drying device B using ultrasonic waves, a secondary drying device C using warm air, and each of these devices A To D (not shown)
And a grounding stand E that stores and holds the

In the slat type conveyor D, a workpiece 20 formed by stacking and stacking a plurality of paper sheets so that each side thereof is aligned so that the back surface 20a side is slightly lower than the front surface side. The conveyor D comprises an endless rotating band 1 forming a horizontal mounting surface 1a which can be set to an inclined sideways posture, and a protruding piece 2 projecting upward from the endless rotating band 1. A portion projecting further laterally from the uppermost side in the transfer direction is set in a set portion S for manually setting the workpiece 20 on the horizontal mounting surface 1a. The workpiece 20, which is set on the horizontal mounting surface 1 a of the moving belt 1 in a sideways posture, is continuously transferred in the order of the back gluing device A, the primary drying device B, and the secondary drying device C. .

The back gluing device A installed on the uppermost side of the transfer path by the slat type conveyor D is configured as shown in FIGS. 3 and 5 to 6. In other words, two shafts 6 and 7 are rotatably supported via bearings 4 and 5 at two locations in the apparatus frame 3 that are separated from each other before and after in the conveyor transfer direction. The glue application roller 8 made of a porous hard resin has an outer peripheral surface 8a.
Is fixed in contact with the back surface 20a of the workpiece 20 transferred by the conveyor D, and a water absorbing roller 9 made of a porous soft resin is provided at the lower end of the other upper and lower shafts 7. A part of the outer peripheral surface 9a is fixed to a state in which excess moisture is adsorbed and removed by softly contacting the back surface 20a of the workpiece 20 after applying the glue. The two upper and lower shafts 6, 7 have toothed pulleys 10, 1 at their upper ends.
The upper and lower shafts 6 are linked to each other via a pair of bevel gears 13 and a horizontal horizontal shaft 14 via a pair of bevel gears 13 and 13 and a motor (not shown). Thus, the glue applying roller 8 and the moisture adsorbing roller 9 are configured to be synchronously rotatable about the vertical shafts 6 and 7.

In the outer peripheral surface 8a of the glue applying roller 8, a position facing the outer peripheral surface of a position displaced rearward in the roller rotation direction with respect to a position in contact with the back surface 20a of the workpiece 20 is shown in FIG. As shown in FIG. 8, an arc-shaped guide plate 15 is provided in a fixed state with a slight gap therebetween, and the guide plate 15 and the outer peripheral surface 8a of the glue applying roller 8 are provided.
The water-based glue 21 can flow downward from above, and the water-flowing glue 21 flows onto and adheres to the outer peripheral surface 8a of the roller 8 for glue application.
6 are formed. A glue replenishing means for continuously replenishing the aqueous glue 21 is provided at an upper end portion of the glue flow channel 16. This glue replenishing means is provided with a horizontal shaft 18 in which a part of the outer peripheral surface is immersed in the aqueous glue 21 accommodated in the tray 17 fixed and set to the bottom of the apparatus frame 3 in an inclined posture.
And a wheel 19 in the form of a water wheel that scoops up the aqueous glue 21 by continuously driving around it.
And a chute-shaped flow path 22 fixed to and held by the apparatus frame 3 so as to be integrated with the guide plate 15 so as to flow and guide the aqueous glue 21 scooped up to the upper end of the flow-down flow path 16. I have.

Further, a portion in front of the glue applying roller 8 on the back surface 20a of the workpiece 20 in the direction of roller rotation is located at a position forward of the glue applying roller 8 when the glue applying roller 8 passes. Aqueous glue 21 attached to outer peripheral surface 8a
Before applying to the workpiece 20, the amount of
The leveling roller 23 for averaging over the entire area is provided in a state of lightly contacting the outer peripheral surface 8a of the glue applying roller 8. On the other hand, at a position behind the above-mentioned glue application portion in the roller rotation direction, after the glue is applied to the workpiece 20, the entirety of the outer peripheral surface 8 a of the glue applying roller 8 comes into contact and remains on the outer peripheral surface 8 a. A scraper 24 for scraping off excess aqueous glue is fixed to the apparatus frame 3. Further, a knurled squeezing roller 25 pressing the outer peripheral surface 9a of the moisture adsorbing roller 9 to squeeze and remove the moisture adsorbed by the roller 9 is provided at a position behind the moisture adsorbing roller 9 around the vertical axis. It is rotatably supported. The squeezing roller 25 and the moisture adsorption roller 9 are linked via a pair of flat gears 26 so as to be rotatable relative to each other.

In the back gluing apparatus A configured as described above, the bookbinding workpiece 20 is manually inserted on the horizontal mounting surface 1a of the endless rotary band 1 on the conveyor D at the setting section S, and the bookbinding workpiece 20 is turned sideways. Conveyor D set in
At the same time, the motor (not shown) is started to drive and rotate the glue applying roller 8, the moisture adsorption roller 9, the squeezing roller 25, and the rotary wheel 19, respectively, so that the outer peripheral surface 8a of the glue applying roller 8 is rotated. When it passes through the adhesive flow passage 16 in rotation, a part of the aqueous adhesive 21 flowing downward from above is transferred and adhered, and the amount of the adhesive adhered is leveled by the roller 23 so that the outer peripheral surface 8 a The whole area is averaged to form a uniform and uniform adhered state. Immediately thereafter, the outer peripheral surface 8a of the glue applying roller 8 is continuously transferred horizontally by the conveyor D in the horizontal direction.
The water-based glue 21 that is uniformly and uniformly attached to the outer peripheral surface 8a of the glue applying roller 8 is in contact with the back surface 20a of the workpiece 2.
0 is uniformly applied to the back surface 20a. After the glue is applied, the scraper 24 is applied to the entire outer peripheral surface 8a of the glue applying roller 8.
And the excess aqueous glue remaining on the outer peripheral surface 8a of the roller 8 is scraped off, so that the outer peripheral surface 8a of the roller 8 which has been transferred to the next paste flow channel 16 is always stable without variation. The same amount of glue is adhered, and the same operation is repeated thereafter, so that a stable back gluing operation can be always performed on the workpiece 20 which is successively transferred.

As shown in FIGS. 2 and 4, the primary drying device B is provided with two ultrasonic oscillators 27 arranged before and after in the transfer direction facing the transfer path of the workpiece 20 by the conveyor D. , 27. These two ultrasonic oscillators 27, 27 include ultrasonic oscillators 28, 28 having a driving frequency of 470 KHz and an output of 300 W, ultrasonic oscillators 29, 29 for electrostriction, magnetostriction, etc., and these ultrasonic oscillators. Iron, duralumin, which expands and widens the vibrators 29, 29,
A half-wave longitudinal resonance horn 30, 30 made of metal such as a titanium alloy is used.
The ultrasonic vibrators 29, 29 are driven to resonate by inputting high-frequency power to the 9, 9 and 29, and the longitudinal vibration of the ultrasonic vibrators 29, 29 is reduced to 20 μm or more, and
It is configured to widen and expand to an amplitude of μm or more.

The half-wave longitudinal resonance horn 3 in the two ultrasonic oscillators 27, 27 constituting the primary drying device B
0 and 30 are 1-2 with respect to the back surface 20a of the workpiece 20.
It is a non-contact type having a gap in the range of 0 mm.

In the primary drying apparatus B configured as described above, 20 μm is applied to the back surface 20 a of the work 20 on which the aqueous paste 21 is applied through the half-wavelength longitudinal resonance horns 30, 30.
m or more, preferably 40 μm or more, by applying an ultrasonic wave to the applied aqueous glue 21 to apply high-speed vibration to form a plurality of paper sheets forming the work piece 20 into the deep layer of the glue. In addition to trying to improve the tensile strength by penetrating the adhesive component, it exerts a drying function that blows out the saturated steam on the glue surface during drying and causes the water inside the applied glue to emerge on the surface by ultrasonic waves. Accordingly, it is possible to perform a predetermined primary drying in a short time without having a strong adhesive force and without causing deterioration or dimensional change of the sheet due to a rise in temperature of each sheet.

The secondary drying device C is shown in FIGS.
As shown in FIG. 2, a hot dryer 31 installed in a grounding stand E and a plurality of hot dryers 31 (three in the drawing) arranged in parallel in the transfer direction facing the transfer path of the workpiece 20 by the conveyor D , A sirocco fan 33 provided corresponding to each of the nozzles 32 and connected to the hot dryer 31 via a pipe 33. It is composed of
By blowing hot air from the hot air nozzle 32 constituting the secondary drying device C toward the back surface 20a of the workpiece 20, the back glue is applied and the back glued portion is primarily dried by ultrasonic waves. The secondary drying of the entire workpiece 20 can be performed, and a plurality of sheets of the workpiece 20 can be uniformly dried to secure a strong adhesive force.

In the above-described embodiment, as the back gluing device A which is a pre-process of the primary drying device B, the glue applying roller 9 driven and rotated around the vertical shaft 6, the glue flowing down flow path 16, Although the configuration including the roller 23, the scraper 24, and the like is used, the configuration is not limited thereto, and a back gluing device having any configuration may be used.

[0020]

As described above, in summary, according to the present invention, the ultrasonic vibration is applied to the back surface of the workpiece through the resonance horn provided on the back surface of the workpiece after gluing, thereby increasing the temperature. The primary drying using ultrasonic waves that can penetrate the adhesive component of the glue deeply into the layers of multiple sheets and increase the tensile strength without inducing Improve drying efficiency compared to drying using hot air or hot air alone by using together with secondary drying using hot air, which can quickly and uniformly dry the adhesive component that has permeated up to Space-saving, while using a small amount of glue, it can secure a strong adhesive force, and can efficiently obtain a good-finished product without deterioration or dimensional change. Achieve the results.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an entire continuous bookbinding facility including a back glue drying device according to the present invention.

FIG. 2 is a schematic plan view of the same equipment.

FIG. 3 is a vertical sectional side view of a main part (back gluing device) in the facility.

FIG. 4 is a vertical sectional side view of another main part (drying device) in the above equipment.

FIG. 5 is a partially omitted perspective view of a main part (back gluing device) shown in FIG. 3 as viewed from the front.

FIG. 6 is a partially omitted perspective view of a main part (back gluing device) shown in FIG. 3 as viewed from the back.

FIG. 7 is an enlarged cross-sectional plan view of a main part of the back gluing device.

8 is a longitudinal sectional view taken along the line XX with arrows in FIG. 7;

[Explanation of symbols]

 Reference Signs List 20 Workpiece 20a Backside of workpiece 29 Ultrasonic vibrator 30 Resonance horn 32 Hot air nozzle A Back gluing device B Primary drying device C Secondary drying device

Claims (3)

[Claims] 1. A method according to claim 1, further comprising the step of drying a glued portion having an aqueous paste applied to a back surface thereof while transferring a bookbinding work in which a plurality of sheets are aligned and stacked. A drying device of a bookbinding back gluing unit for continuous binding to the substrate, wherein a resonance horn for widening and expanding the vibration of the ultrasonic vibrator is provided on the back of the pasted workpiece, and the aqueous glue is passed through the resonance horn. A primary drying device configured to give an ultrasonic wave, and a secondary drying device that blows warm air toward the back surface of the workpiece are arranged side by side in the transfer direction of the workpiece. Drying device for the back gluing section for bookbinding. 2. The apparatus according to claim 1, wherein a plurality of ultrasonic vibrators constituting the primary drying apparatus are provided along a transfer direction of the workpiece. 3. The apparatus for drying a back gluing portion for bookbinding according to claim 1, wherein the resonance horn for widening and expanding the vibration of the ultrasonic vibrator has an amplitude of 20 μm or more.