JP3655278B2 - Double facer glue residue remover - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for removing glue residue from a double facer, and in particular, due to excess glue residue protruding from the side surface of a bonded corrugated sheet and misalignment (ear misalignment) at the end of the corrugated cardboard sheet to be bonded. The present invention relates to a double facer glue residue removing apparatus provided with an adhesive residue removing apparatus that effectively removes adhesive when a paste adheres to a corrugated cardboard surface, a canvas belt and a hot plate.
[0002]
[Prior art]
In the double facer in the corrugated cardboard manufacturing machine, one sheet piece coated with glue on the liner and the other sheet piece adhered to the one sheet piece are sequentially supplied from the previous step, and one and the other sheet polymerized in the double facer. The corrugated cardboard sheet is sandwiched between a canvas belt fitted with a weight roll and a hot plate heated by a heating means, and the glue is dried while being transferred to the next process to be bonded.
[0003]
These canvas belts and hot plates are set so that the width is adapted to the maximum width of the corrugated sheet to be manufactured so that it can be applied to the manufacture of various corrugated boards. For this reason, corrugated board with a narrow width is manufactured. In such a case, there is a risk that excess paste that has been gelled by the pressure of the weight rolls may dig out from the side surface of the cardboard sheet.
[0004]
The glue that sticks out gradually becomes dry and solidified granular glue residue, which adheres to the corrugated cardboard sheet surface, canvas belt, and hot platen. There is a risk of producing a defective product in which the surface of the cardboard sheet is deformed into irregularities, and the cardboard sheet sliding on the hot plate may be jammed.
[0005]
In addition, when the sheet pieces to be bonded are superposed, the end portions do not align and misalignment (ear misalignment) occurs, and in particular, the sheet piece on one side (upper side) coated with glue on the top of the liner protrudes and paste surface When exposed, the liner may come into contact with the hot plate and cause glue to adhere, so leaving it unattended will have the same adverse effects as described above.
[0006]
As a conventional technique for solving such a problem, for example, as disclosed in Patent Document 1 and Patent Document 2, it is wound around each rotating roller disposed on the start end side and the end end side of the double facer to run endlessly. A proposal has been made to remove the glue residue adhering to the canvas belt by the glue residue removing device engaged with the rotating roller on the start end side of the canvas belt.
[0007]
[Patent Document 1]
Japanese Utility Model Publication No. 5-38924 [Patent Document 2]
Japanese Patent Laid-Open No. 2001-233435
[Problems to be solved by the invention]
However, when the glue residue removing device is provided at the position of the rotary roller on the start end side of the double facer that drives the canvas belt as in Patent Documents 1 and 2, glue sticking out most occurs in the initial stage of drying. The glue residue generated at the position adjacent to the rear side of the starting-end-side rotating roller, that is, the entrance side of the double facer, is removed after the canvas belt has made a round while remaining attached to the exit side.
[0009]
For this reason, the glue residue adhering to the canvas belt can be removed during one round, but the surface of the cardboard sheet is uneven by the newly generated adhesive residue adhering to the corrugated cardboard surface, canvas belt and hot plate. There is a risk of producing a defective product deformed into a corrugated sheet, and there is a risk that the corrugated cardboard sheet sliding on the hot plate will be jammed.
[0010]
Therefore, the present invention provides an apparatus for removing glue residue from a double facer that can solve these problems of the prior art, and is particularly slidably in contact with the lower surface side of a corrugated cardboard sheet that runs on a hot plate, and is eaten from the side surface of the corrugated cardboard sheet. The main purpose is to remove the excess glue residue and the paste residue on the exposed surface due to the ear misalignment, and to prevent them from adhering to the corrugated cardboard surface, canvas belt and hot plate.
[0011]
[Means for Solving the Problems]
An apparatus for removing glue residue from a double facer according to the present invention is characterized in that it is provided on the hot plate side of the double facer, and is provided with means for removing glue residue that is in sliding contact with the lower surface side of the cardboard sheet running on the hot plate. The glue residue adhering to the cardboard sheet is removed by wiping, scraping or the like by means of a glue residue removing means which is in sliding contact with the lower surface side in a state where the cardboard sheet can be moved.
[0012]
This glue debris removal device can arrange glue debris removal means at one or more places between adjacent hot plates at the front side of the double facer or in front of the first hot plate of the double facer. Yes, an effective position for removing glue residue can be appropriately selected and installed.
[0013]
In addition, the double scraper debris removal device of the present invention is disposed between adjacent hot plates at the front side of the double facer, and is in sliding contact with the lower surface side of the corrugated cardboard sheet and the lower surface sides of both ends of the canvas belt in the normal operation. At the same time, it is characterized in that there is provided an adhesive residue removing means that is in sliding contact with the lower surface side of the entire width direction of the canvas belt during idle operation.
[0014]
With this glue residue removing device, it is possible to remove the glue residue adhering to the surface of the corrugated cardboard sheet and both ends in the width direction of the canvas belt during normal operation, and it is possible to remove the glue residue throughout the width direction of the canvas belt during idle operation. It is.
[0015]
In particular, since the glue residue generated on the entrance side of the double facer where paste sticking is most likely to occur in the initial stage of drying is removed from the surface of the corrugated cardboard sheet and both ends in the width direction of the canvas belt. This eliminates the risk of producing a defective product by deforming the surface of the sheet into irregularities, and also prevents the cardboard sheet sliding on the hot plate from jamming.
[0016]
The glue residue removing means can take a form of being provided at one place or a plurality of places between the adjacent hot plates at the front side of the double facer. Since it is effective to remove before consolidation, it is desirable to take a form provided at least between the first hot plate and the next hot plate on which the weight roll is placed on the canvas belt.
[0017]
The glue residue removing means removes the glue residue adhering to the surface of the corrugated cardboard sheet and the width direction both ends of the canvas belt, thereby removing the adhesive residue adhering to the hot plate. Although it is possible to apply the means, it is possible to remove the glue residue effectively with an inexpensive and simple configuration by adopting a form including a removing roll that slides on the surface of the corrugated cardboard sheet and rotates in the direction opposite to the transfer direction. be able to.
[0018]
The removal roll is always provided with a scraping piece that engages with the removal roll and scrapes the accumulated glue residue, so that the removal roll is always maintained in a state suitable for removing the adhesive residue. It is possible.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a double facer paste residue removing apparatus according to the present invention will be described in detail based on the illustrated embodiment to which the present invention is applied. FIG. 3 is a partially enlarged sectional view, and FIGS. 4 and 5 are enlarged longitudinal sectional views for explaining the structure and operation of the glue residue removing device.
[0020]
As shown in FIG. 1 and FIG. 2, an endless canvas wound around a rotating roll 2 (not shown on the end side) disposed on the start end side and the end end side on the upper side of the path for transferring the cardboard sheet 1 A belt 3 is provided, and one of the rotating rolls 2 is driven to rotate by a motor, thereby continuously running in an endless manner.
[0021]
The canvas belt 3 is formed of a flexible cloth material, and is set to have a width dimension adapted to the maximum width dimension of the corrugated cardboard to be manufactured. A number of weight rolls 4 (4A, 4B) are arranged in parallel at predetermined intervals on the upper surface of the.
[0022]
The weight roll 4 supports both ends to a bearing portion formed by a vertically long hole and the like so as to be movable up and down. When the cardboard sheet 1 is transferred, the weight roll 4 presses the canvas belt 3 by its own weight after being pushed up, The weight roller 4B on the rear side is smaller in diameter than the weight roller 4A on the front side so as to lighten the weight.
[0023]
A plurality of hot plates 5 (5A, 5B, 5C) heated by heating means such as steam (not shown) are attached to the base 6 at predetermined intervals on the lower side of the passage for transferring the cardboard sheet 1 The base 6 is attached with a removing roll portion 7A provided at an appropriate position between the adjacent hot plates 5 and a paste residue removing device 7 by a removal driving portion 7B.
[0024]
The hot plate 5 is formed to have the same horizontal width as the canvas belt 3 or slightly wider, and an inclined introduction guide portion 8 is formed at the tip of the hot plate 5A first provided on the inlet side. One sheet piece 1A obtained by applying glue to the liner sequentially supplied from the previous process and the other sheet piece 1B to be bonded are easily received, and each sheet piece 1A, 1B is bonded in a polymerized state to corrugated cardboard. Sheet 1 is formed.
[0025]
As shown in detail in FIGS. 4 and 5, the removing roll unit 7 </ b> A has a cylindrical removing roll 9 arranged as a removing means between the hot plates 5 in a mode in which both ends protrude outward from the lateral width of the hot plate 5. The removal roll 9 is rotatably supported at both ends by a bearing member (not shown) attached to the base 6, and a transmission member 11 such as a belt or a chain is wound around a driven wheel 10 attached to one end side. Are connected to the removal drive unit 7B side.
[0026]
The removal drive unit 7B includes a motor 13 attached to an attachment member 12 attached to the base 6, and the transmission member 11 is wound around a drive wheel 14 attached to the output shaft of the motor 13 so that the removal roll unit 7A side. When connected and the motor 12 is rotated, the removal roll 9 is rotated in the clockwise direction opposite to the direction in which the cardboard sheet 1 is transported, as indicated by an arrow.
[0027]
During normal operation for transferring the cardboard sheet 1, as shown in FIG. 4, the cardboard sheet 1 is being transported in a sandwiched manner between the canvas belt 3 pressurized by the weight roll 4 and the heated hot plate 5. Adhesion and drying operations are performed, and the removing roll 9 rotates while being in sliding contact with the corrugated cardboard sheet 1, whereby the removing roll unit 7 </ b> A removes the glue residue 20.
[0028]
The removal operation of the glue residue 20 is a gel-like paste residue that has started to dry somewhat by heating of the hot plate 5 after surplus paste that has erupted from both sides of the corrugated cardboard sheet 1 flows on the hot plate 5. The adhesion of 20 to the surface of the corrugated cardboard sheet 1 can be removed by wiping with a removing roll 9 as a removing means.
[0029]
Further, the canvas belt 3 formed of a flexible cloth material has both end sides 3a without the corrugated cardboard sheet 1 hung on the removing rolls 9 between the hot plates 5 as shown in FIG. Even when the excess glue that protrudes to 3 a adheres to the canvas belt 3 as a gel-like glue residue 20 directly or via the hot plate 5, it can be removed by wiping with the removing roll 9.
[0030]
Further, during idle operation in which the corrugated board sheet 1 is not transferred, the canvas belt 3 is sandwiched between the weight roll 4 and the hot plate 5 and between the weight roll 4 and the removal roll 9 as shown in FIG. Since it travels, the glue residue 20 attached to the canvas belt 3 can be removed by rotating the removing roll 9 while being in sliding contact with the canvas belt 3.
[0031]
The removed glue residue 20 gradually accumulates on the removing roll 9 if left as it is, so that a scraping portion 15 for removing the glue residue 20 is provided at a position adjacent to the removing roll 9 and attached to the base 6. 16, a mounting screw 18 that fixes the pressing plate 17 to the mounting plate 16, and a scraping piece 19 that is sandwiched between the mounting plate 16 and the pressing plate 17 and that has its tip directed to the removing roll 9.
[0032]
The removal roll 9 can take a form formed of a hard material such as a metal pipe or a form formed of an elastic material such as urethane, and has the same outer diameter as in the illustrated embodiment. In addition to the cylindrical shape, it is also possible to adopt a form in which the outer diameter is made larger than the lateral width of the corrugated cardboard sheet 1 by the thickness of the corrugated cardboard sheet 1 and slidably contacted with the canvas belt 3.
[0033]
The removal roll portion 7A can be provided at one or more places where the most effective removal of the glue residue 20 between the adjacent hot plates 5 is possible. However, when the drying progresses and the glue solidifies, it is difficult to remove. When it is provided on the rear side, it is adversely affected by the glue residue 20 attached before that, so it is desirable to provide it on the front side as much as possible.
[0034]
Further, when the corrugated cardboard sheet 1 is pressed by the weight roll 4, the amount of paste protruding increases, so in the illustrated embodiment, the first hot plate 5A that is not pressed is excluded, and the front side A removing roll portion 7A having a removing roll 9 is provided between the second and third hot plates 5B and 5C.
[0035]
However, even if the first sheet has the pressure roll 4 or the first sheet does not have the pressure roll 4, the removal roll unit 7A is provided between the first and second hot plates 5A and 5B. It is also possible to adopt a form to be provided, and a form to be provided between the third hot plate 5C and the fourth sheet and a form to be provided at a plurality of places can be adopted as necessary.
[0036]
Since the removing roll unit 7A can be installed in a state in which the removing roll 9 is slid to an interval at which the removing roll 9 can be mounted between the heat plates that are usually slightly separated as clearances due to thermal expansion, It can be easily installed by selecting between the hot plates.
[0037]
Further, the removing roll 9 as a removing means can be mounted not only between the respective heat plates but also in front of the first heat plate 5A of the double facer. For example, in the illustrated embodiment, the introduction guide is inclined. A removal roll 9 is provided in front of the portion 8 to remove the glue residue dripping from the one piece 1A to the other piece 1B.
[0038]
In the illustrated embodiment, the removal drive unit 7B is provided at a position separated from the removal roll unit 7A, and the removal roll 9 is driven to rotate via the transmission member 11 such as a belt. However, the removal drive unit 7B is removed. It is also possible to adopt a form that is provided near the roll part 7A and is transmitted by a gear, or a form in which a motor is directly connected to one end of the removal roll part 7A via a speed reducer.
[0039]
Further, in the illustrated embodiment, the removing roll 9 is used as the removing means so as not to damage the corrugated cardboard sheet surface. However, the scraping piece similar to the scraping piece 19 is provided in a mode of contacting the corrugated cardboard sheet surface and the canvas belt. A simple and inexpensive form in which the scraping portion 15 is provided can also be provided.
[0040]
In the case of the removing means according to this form, the scraping piece is provided in an inclined manner forward or backward, or the scraping piece or the removing roll 9 is spring-biased to the corrugated cardboard surface and the canvas belt side by a spring means. Can be taken.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an essential part of a double facer which is an embodiment to which the present invention is applied and is equipped with a glue residue removing device.
FIG. 2 shows a plan view of FIG.
FIG. 3 shows a partially enlarged sectional view of FIG. 1;
4 is an enlarged longitudinal sectional view for explaining the structure and operation of the glue residue removing apparatus in FIG. 1, and shows a state of glue residue removal during normal operation.
FIG. 5 similarly shows the state of glue residue removal during idling.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Corrugated cardboard sheet 2 Rotating roll 3 Canvas belt 3a (both sides of canvas belt) 4 Weight roll 5 Hot plate 6 Base 7 Glue waste removal device 7A Removal roll part 7B Removal drive part 8 Introduction guide part 9 Removal roll (removal means)
DESCRIPTION OF SYMBOLS 10 Drive wheel 11 Power transmission member 12 Mounting member 13 Motor 14 Drive wheel 15 Scraping part 16 Mounting plate 17 Holding plate 18 Mounting screw 19 Scraping piece 20 Glue residue

Claims (5)

An apparatus for removing glue residue from a double facer, which is provided between adjacent hot plates at a position on the front side of the double facer, and is provided with a means for removing glue residue that comes into sliding contact with the lower surface side of a cardboard sheet running on the hot plate. Means for removing the glue Kas, during normal operation with sliding contact with the lower surface of both ends in the width direction of the lower surface side and the canvas belt of the cardboard sheet, the idle operation to claim 1, in sliding contact with the lower surface of the entire width of the canvas belt The double facer glue residue remover. 3. The glue residue removing apparatus for a double facer according to claim 1, wherein the glue residue removing means is disposed between at least a first hot plate on which a weight roll is placed on a canvas belt and a next hot plate.   The double-facer glue residue removing apparatus according to any one of claims 1 to 3, wherein the glue residue removing means is a removal roll that is in sliding contact with the lower surface of the cardboard sheet and rotates in a direction opposite to the transfer direction.   The apparatus for removing glue residue from a double facer according to claim 4, wherein the removal roll is provided with a scraping piece that scrapes away the glue residue accumulated by engaging with the removal roll.

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