JPH0825832A - Coating device of adhesive agent - Google Patents

Abstract

PURPOSE:To apply high-viscosity water-soluble adhesive agent to the back of a paper bundle which is to be bound, make it to take to the back and flatten it. CONSTITUTION:The first coating roller 4A and second coating roller 4B are made to arrange within a heating vessel 2 holding an adhesive agent 1 so as to be able to turn and drive in the same direction. A pushing-in rod 12 is set up on an exit side of the first roller 4A. A flattening rod 13 is set up on an exit side of the second coating roller 4B. The adhesive agent 1 applied to the back of a paper bundle 11 by the first coating roller 4A is pushed in the back of the paper bundle 11 by the pushing-in rod 12 is made to soak into the back. The adhesive agent 1 applied to the back by the second coating roller 4B is smoothed and adhesive surface is flattened. Webbings of the adhesive agent at parts of the rods 12, 13 are cut off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive applicator for applying an adhesive having a high viscosity to the spine of a paper bundle during bookbinding.

[0002]

2. Description of the Related Art For example, when binding a signature formed by folding printed paper in page order to bind a book, a stack of papers in which each signature is collected in a page order is cut by a cutting machine. One of the steps is to apply an adhesive to the spine, which is the binding side, and then attach a cloth or paper after cutting with.

As a typical adhesive used for such bookbinding, there is known a thermoplastic hot melt adhesive capable of solidifying immediately upon cooling and adhering in an extremely short time.

However, since the above-mentioned hot melt adhesive is water-insoluble, there is a problem that the adhesive remains as stains on the paper surface when a book using this adhesive is used as recycled paper. Since the hot melt adhesive is used at a high temperature of 180 ° C., its handling and maintenance are difficult.

Therefore, recently, a water-soluble adhesive such as a gelatin adhesive having a working temperature of about 80 ° C. and a viscosity higher than that of a hot-melt adhesive has been used.

[0006]

However, since the above-mentioned water-soluble adhesives that have been used recently have higher viscosities than hot-melt adhesives, even if they are simply applied to the spine of a bundle of paper to be bound. Since the impregnation property is poor, it is difficult to obtain a flatness suitable for pasting cloth or paper, and further, a situation in which a thread is pulled between the adhesive application member and the spine of the paper bundle easily occurs. This will cause problems such as sticking to the equipment and soiling the surroundings.

Therefore, the present invention makes it possible to effectively impregnate a spine of a paper bundle to be bound with a water-soluble adhesive having a high viscosity, and to provide a flat adhesive suitable for pasting cloth or paper. It is an object of the present invention to provide an adhesive application device that enables a surface to be obtained and does not cause a problem of stringing.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a heating container in which a water-soluble adhesive having a high viscosity is housed so that the temperature can be controlled to a predetermined temperature. The first coating roller and the second coating roller are arranged side by side so that the upper end level thereof is located above the heating container so as to be rotatably driven in the same direction, and the upper portions of the first coating roller and the second coating roller are inserted. At the side position, a first regulating blade and a second regulating blade for regulating the thickness of the adhesive adhered to the outer peripheral surfaces of the first coating roller and the second coating roller are respectively arranged, and further, the first coating roller of the first coating roller is arranged. A push rod for pushing the adhesive applied to the spine of the paper bundle to be bound by the first applying roller into the spine of the paper bundle and allowing it to soak is provided at the upper exit side position, and the upper part of the second applying roller is provided. In the exit position, 2 coating roller by a configuration in which established the flattened rod for planarizing the applied adhesive to the back of the sheet bundle.

[0009]

After the adhesive is applied to the spine of the bundle of paper to be bound by the first applying roller, the adhesive is pushed in by the pushing rod so that the spine of the bundle of paper is impregnated with the adhesive.
After the adhesive is applied to the spine of the sheet bundle by the second applying roller, the adhesive is scraped and leveled by the leveling rod. Further, when the spine of the bundle of sheets passes through the portion of each rod, the threading is cut off by each rod.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the present invention.
The operating temperature is 80 when accommodating the highly water-soluble adhesive 1
Heating container 2 with temperature controllable to ℃
First, each of which is cantilevered by a spindle 3.
The coating roller 4A and the second coating roller 4B are connected to each other by the support shaft 3
Are parallel to each other and the upper end position of the outer peripheral surface is arranged side by side so as to be located at the same level L above the upper edge of the heating container 2, and the spindle 3 is projected so as to extend horizontally outside the heating container 2. Is connected to a rotation driving device (not shown), and the first and second coating rollers 4A and 4B are rotated in the same direction by the driving of the rotation driving device.
The adhesive 1 can be continuously attached to the outer peripheral surfaces of A and 4B. The heating container 2 has a double structure having an inner tank 2a and an outer tank 2b, a mixed liquid 19 of water and glycerin is put between the inner and outer tanks 2a and 2b, and a heater 20 is provided at the bottom of the outer tank 2b. It is attached.

Further, at the upper entrance side position (upstream side position in the rotating direction) of the first coating roller 4A and the second coating roller 4B, the outer peripheral surface of the first coating roller 4A and the outer peripheral surface of the second coating roller 4B are attached. Arranging a first regulation blade 5A and a second regulation blade 5B for regulating the thickness of the adhesive 1 made constant,
The gripping device 14 holds the paper bundle 11 to be bound at the upper end positions of the outer peripheral surfaces of the first and second coating rollers 4A and 4B in which the thickness of the adhesive 1 is regulated by the first and second regulation blades 5A and 5B.
Paper bundle 1 while moving in the front-rear direction while being held by
By bringing the spines of No. 1 into contact in order, a certain amount of the adhesive 1 is applied to the spines of the paper bundle 11. The first and second
Both ends of the restriction blades 5A and 5B are held by a holding block 6 and fixed to a shaft 7 arranged in parallel with the support shaft 3, and an overhanging portion 8 extended from the holding block 6 is provided.
The first and second coating rollers 4A and 4B are arranged so that they can be displaced in the vertical direction by adjusting a bolt and nut 10 mounted between the support table 9 fixed to the upper edge of the heating container 2.
The amount of the adhesive 1 attached to the outer peripheral surface of is adjusted.

Further, the adhesive 1 applied to the spine of the sheet bundle 11 by the first application roller 4A is applied to the spine of the sheet bundle 11 at the upper exit side position (downstream side position in the rotation direction) of the first application roller 4A. Push rod 12 to push it in to fit
Is fixedly arranged parallel to the support shaft 3 in accordance with the upper end level L of the first coating roller 4A, and at the upper exit side position of the second coating roller 4B, the spine of the sheet bundle 11 is moved by the second coating roller 4B. A flattening rod 13 for scraping and flattening the adhesive 1 applied to the upper surface of the second applying roller 4B
And fixedly arranged in parallel with the support shaft 3.

When the first coating roller 4A and the second coating roller 4B are rotated in the clockwise direction in FIG. 1 through the support shaft 3 by the driving of the rotary drive device, the high-viscosity aqueous solution contained in the heating container 2 is rotated. Adhesive 1 is continuously adhered to the outer peripheral surfaces of the first and second application rollers 4A and 4B, and the thickness thereof is regulated to a certain amount by the first and second regulation blades 5A and 5B at the upper portion. become.

When the adhesive 1 is applied to the spine of the bundle of papers 11 to be bound, in the above state, first, the bundle of papers 11 is printed.
While moving in the direction of the arrow, the spine is brought into contact with the upper end position of the outer peripheral surface of the first coating roller 4A so as to be moved downstream in synchronization with the rotation speed of the first coating roller 4A. As a result, the adhesive 1 having a constant thickness attached to the outer peripheral surface of the first application roller 4A is applied so as to be transferred to the spine of the sheet bundle 11. The adhesive 1 applied to the spine of the sheet bundle 11 by the first applying roller 4A has a high viscosity at the time of passing through the first applying roller 4A, and thus the adhesive sheet 1 has a high viscosity.
Since the spine of No. 1 is not soaked into the spine of 1
1 is moved to the downstream side so that the spine of the sheet bundle 11 is rubbed against the pushing rod 12. As a result, the adhesive 1 lightly applied to the spine of the bundle of paper 11 is rubbed into the bundle of paper 11 so as to be pushed into the bundle of paper 11 and soaks into it.

Next, the sheet bundle 11 is moved further downstream so that the adhesive 1 attached to the outer peripheral surface of the second application roller 4B is applied to the spine on which the adhesive 1 is pressed. To As a result, the adhesive 1 is applied to the spine of the paper stack 11.
Layer is formed with a constant thickness, but it may become medium height due to the surface tension at the time of transfer from the second coating roller 4B. To be rubbed against the flattening rod 13. As a result, the middle-height portion of the adhesive 1 applied to the spine of the sheet bundle 11 is horizontally spread and flattened. Therefore, it is possible to obtain a flat adhesive surface suitable for pasting cloth or paper in a later step.

In the above, since the adhesive 1 has a high viscosity, when the sheet bundle 11 passes over the first coating roller 4A,
Alternatively, when the sheet bundle 11 passes over the second coating roller 4B, the adhesive 1 may pull the thread from the rear end of the spine of the sheet bundle 11, but the rods on the delivery side of the coating rollers 4A and 4B, respectively. The yarn cutting action will be performed when passing 12 and 13. That is, even if the sheet bundle 11 passes over the first and second coating rollers 4A and 4B, the first and second coating rollers 4
Since the subsequent adhesives 1 are continuously supplied to A and 4B by the rotation thereof, the subsequent adhesives 1 draw the thread at the rear end of the paper bundle 11, but the rods 12 and 13 are Since it is a non-rotating member, the supply of the subsequent adhesive 1 is cut off at this portion, and the stringing is cut off.

Next, FIGS. 3A and 3B show another embodiment of the present invention. In the same construction as the above embodiment, the pushing rod 12 is attached to the outer circumference of the first coating roller 4A. It constantly pushes up and urges to a position slightly above the upper end level L of the surface. That is, both end portions 12a of the pushing rod 12 are processed into a quadrangular prism shape, and the quadrangular prism end portion 12a is vertically arranged in a vertically elongated hole 15 of a support frame 18 provided upright on the upper edge of the heating container 2. Is slidably inserted and supported only in the support frame 18
The compression spring 17 is interposed between the bracket 16 protruding below the elongated hole 15 and the lower surface of the end 12a of the rod 12 until the end 12a of the rod 12 reaches the upper end of the elongated hole 15. The rod 12 is pushed upward and biased, and the upper end position of the rod 12 at this time is positioned slightly above the upper end level L of the outer peripheral surface of the first coating roller 4A.

When the embodiment shown in FIG. 3 is adopted, the rod 12 and the spring 17 are attached to the spine of the sheet bundle 11 which has been moved along the outer peripheral surface upper end level L of the first coating roller 4A.
Since it can be forcibly pressed by the force of
The adhesive agent 1 applied to the spine of the can be pushed in more surely and allowed to soak.

In the above embodiment, the case where the first and second coating rollers 4A and 4B are supported by the support shaft 3 in a cantilever manner is shown, but both ends may be supported. In the embodiment, the case where the heating container 2 having a double structure is used is shown, but the heating container does not have to have a double structure as long as the adhesive can be kept at the working temperature.
Any type of temperature control means can be adopted,
It is needless to say that the restriction blades 5A and 5B are not limited to the position adjustment by the bolts and nuts 10 and that various modifications can be made without departing from the scope of the present invention.

[0020]

As described above, according to the adhesive coating device of the present invention, since the pushing rod is installed on the exit side of the first coating roller, the first coating roller coats the spine of the sheet bundle. High viscosity adhesive can be pushed in with the pushing rod, and the adhesive can fit on the spine of the paper bundle,
Further, since the flattening rod is installed on the exit side of the second coating roller, the surface of the adhesive applied to the spine of the sheet bundle can be flattened by the second coating roller, and the cloth can be used in the subsequent process. It is possible to obtain a good adhesion surface suitable for pasting paper and paper,
Further, the presence of both the rods has an excellent effect that the stringing of the adhesive from the rear end of the sheet bundle can be cut off.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of an adhesive applying device of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

3A and 3B show another embodiment of the present invention, in which FIG. 3A is a schematic view showing a supporting structure of a pushing rod, and FIG. 3B is a sectional side view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adhesive 2 Heating container 4A 1st application roller 4B 2nd application roller 5A 1st regulation blade 5B 2nd regulation blade 11 Paper bundle 12 Pushing rod 13 Flattening rod L level

Claims (1)

[Claims] 1. A heating container in which a water-soluble adhesive having a high viscosity is housed so that a predetermined temperature can be controlled, so that the upper end level of the outer peripheral surface is located above the heating container. The first coating roller and the second coating roller are arranged side by side so as to be rotationally driven in the same direction, and the outer peripheral surfaces of the first coating roller and the second coating roller are located at the upper entrance side positions of the first coating roller and the second coating roller. A first regulating blade and a second regulating blade for regulating the thickness of the adhesive adhered to the sheet are arranged respectively, and further, a paper bundle to be bound by the first coating roller at the upper exit side position of the first coating roller. A push rod for pushing the adhesive applied to the spine of the paper bundle to the spine of the paper bundle is installed, and the push rod is installed at the upper exit side position of the second coating roller and is attached to the spine of the paper bundle by the second coating roller. The applied adhesive An adhesive applicator having a structure in which a flattening rod for flattening is installed.