JP4185945B2 - Gluing device in web winder - Google Patents

Description

  The present invention relates to a gluing device in a web winder. More specifically, a web roll that is used to roll up a roll of toilet paper or kitchen paper into a roll product, and then glue the tail end into a roll product such as a toilet roll or kitchen roll. It is related with an attaching apparatus.

The basic configuration of a web winder that manufactures roll products is as follows.
In this prior art, a paper tube is placed in a winding space surrounded by three winding rolls, the paper tube is rotated by three winding rolls, and the web is wound around the paper tube. When the winding diameter reaches a predetermined dimension (for example, 100 to 200 mm), the web is cut, and the tail end of the cut web is bonded to the roll product with an adhesive, whereby the roll product is completed.
As described above, it is necessary to bond the tail end of the cut web every time one roll product is produced.

By the way, the conventional gluing apparatus (patent document 1) is comprised as shown in FIG.
That is, it has a feeding means for unwinding the tail of the web material, an adhesive dispenser 111 for applying an adhesive to the roll product L, and a means for winding the tail again after applying the adhesive. In an apparatus for gluing the tail of a rolled product L of web material already wound, having an upwardly directed groove 155 to which the material is fed, the dispenser 111 is an adhesive material provided with an upwardly directed groove 155. A container 151 and a movable member 157 disposed in the container 151. The movable member 157 is submerged in the adhesive in the container 151, and is bonded when the roll product rotates on the groove 155 facing upward. In order to supply the material, the movable member 157 is moved in the direction of the groove 155 facing upward.

  However, in the conventional gluing device, since the movable member 157 is soaked in the container 151, the amount of glue applied cannot be accurately controlled, and the glue is excessively applied and oozes out of the roll product. On the contrary, there was a problem that the tail of the roll would come off sometime because there was too little glue.

Japanese Patent No. 276964

  In view of the above circumstances, an object of the present invention is to provide a gluing device in a web winder that can accurately measure and apply glue.

A gluing device in a web winder according to a first aspect of the present invention is a web winder for producing a roll product by rotating a paper tube and winding the web around an outer periphery of the paper tube. A gluing device for applying glue for adhering ends, wherein the gluing device has a glue bar having a glue receiving groove at the tip, a nozzle for supplying glue to the glue receiving groove of the glue bar, and the nozzle A glue supply source that supplies glue to the glue product, and an elevating means for elevating and lowering the glue bar between a raised position where the glue is applied to the roll product placed in the glued position and a lowered position where the glue is lowered. It is characterized by.
In the gluing device in the web winder according to a second aspect of the present invention, in the first aspect, the nozzle is provided with a glue supply surface for dripping the glue on the lower surface of the glue discharge hole, and the glue receiving groove of the glue bar is The doctor blade is provided, and the doctor blade is arranged so as to be moved up and down while being in contact with the paste supply surface.
According to a third aspect of the present invention, there is provided a gluing device in the first aspect of the invention, wherein the glue supply source includes a fixed discharge type pump, a motor for rotating the pump, and a rotation speed control device for the motor. It is characterized by.

According to the first invention, since only a certain amount of glue measured by the nozzle can be put on the glue receiving groove of the glue bar, when the glue bar is lifted and glued to the roll product, an amount that is neither too much nor too little Glue can be applied. For this reason, it does not cause glue bleeding or insufficient adhesion to the roll product.
According to the second invention, the doctor blade scoops down the glue that hangs down along the glue supply surface, but the doctor blade comes into close contact with each other, so that it can be scooped out without leaving any glue and adhered to the roll product. For this reason, the measured amount of glue can be transferred to the roll product by an exact amount as it is, and the glue is not excessive or insufficient.
According to the third aspect of the invention, since the pump that discharges glue can deliver a fixed quantity, and the motor for driving the pump can control the number of revolutions, the amount of glue discharged can be accurately increased or decreased depending on the number of revolutions. Regardless, reliable bonding is possible.

Next, an embodiment of the present invention will be described with reference to the drawings.
1A is a sectional view of a gluing device according to an embodiment of the present invention, and FIG. 1B is a partially enlarged view of FIG.
In FIG. 1A, 1 is a glue bar and 2 is a nozzle. The groover 1 is a plate-like member and extends in a direction perpendicular to the paper surface. The length is the length that can apply glue to the entire length of the roll product, and is usually from about 1 m to several m. A glue receiving groove 11 is formed at the upper end of the bar body 10 of the glue bar 1. Reference numeral 16 denotes a box that accepts excess glue that has fallen.
The glue receiving groove 11 shown in FIG. 2B is formed from a doctor blade 12 attached to the upper end portion of the bar main body 10 and a slope 14 formed on the upper end of a presser foot 13 for fixing the doctor blade 12. It is formed in a V shape when viewed. The means for raising and lowering the groove bar 1 is arbitrary, and an arbitrary actuator such as a cam, chain, or cylinder may be used.

As shown in FIGS. 1A and 1B, the nozzle 2 includes a nozzle body 20, a storage portion 21 formed therein, a discharge hole 22 that guides glue forward from the storage portion 21, and a discharge It comprises a cover 23 attached to the front surface of the hole 22 and a glue supply surface 24 for dripping the glue. The glue supply surface 24 includes an inclined supply surface 25 that is inclined obliquely immediately below the discharge hole 22 and a vertical supply surface 26 that is perpendicular to the lower side of the inclined supply surface 25.
Further, the cover 23 is disposed in front of the discharge hole 22 with a slight gap, and the back surface of the cover 23 covers the discharge hole 22 at an angle close to a right angle.

The storage portion 21 of the nozzle 2 is connected to a paste supply source through a pipe, and the paste supply source is provided with a pump 28 for pumping the paste stored in the tank 27. The glue supply source pump P is preferably a gear pump capable of constant feeding, particularly an internal gear pump. The pump is preferably driven by a control device that can change the rotation speed accurately and continuously. For example, a motor 29 driven by a servo motor or an inverter control device is preferable.
In this case, the amount of glue supplied can be accurately controlled by the number of revolutions of the motor 29, and the amount of glue supplied can be adjusted according to the type of web, or an appropriate amount can be supplied while avoiding excessive supply or undersupply.

The glue pressurized by the pump P tries to go outside through the storage portion 21 and the discharge hole 22 of the nozzle 2, but is redirected by the cover 23 so as not to be ejected outside, and along the glue supply surface 24. Quantitatively hangs down. The glue coming out of the discharge hole 22 flows down obliquely on the inclined supply surface 25 at first, so that it does not scatter and the glue falling on the subsequent vertical supply surface 26 is scooped off by the doctor blade 12 of the gluer 1. It is like that.
When the amount of glue dripping down in this way is stored in the glue receiving groove 11 of the glue bar 1 by a certain amount, preparation for gluing is completed.

  In FIG. 1, 3 is a guide plate for rolling the roll product R, and an opening 31 is formed in a part thereof. The opening 31 is a portion into which the glue receiving groove 11 enters when the groover 1 is raised. Accordingly, when the roll product is positioned on the guide plates 3 before and after the opening 31, the glue can be transferred to the lower surface of the roll product R when the groover 1 is raised.

  FIG. 2A shows a state where the groover 1 is raised. During the ascending process, the doctor blade 12 of the groover 1 scrapes off the glue on the vertical supply surface 26 of the nozzle 2 and stores it in the glue receiving groove 11. FIG. 4B is an enlarged view of the roll product R when the roll product R rolls on the guide plate 3 with the glue g in the glue receiving groove 11 protruding into the opening 31. Glue is applied linearly to the surface.

In the gluing device of the present embodiment, as shown in FIG. 1B, the doctor blade 12 scoops the glue that hangs down along the vertical supply surface 26 of the glue supply surface 24. Since they are in close contact with each other, they can be scraped off without leaving any glue and adhered to the roll product R. For this reason, the measured amount of glue can be transferred to the roll product R by an exact amount as it is, and no excess or deficiency of glue occurs. Further, since the pump 28 that discharges glue is a fixed discharge type such as a gear pump, and the motor 29 can control the number of revolutions, the amount of glue discharged can be accurately increased / decreased depending on the number of revolutions of the pump 29, and the web thickness or material It is possible to securely bond with an appropriate amount of glue in accordance with the difference in the difference in embossing and the like.
Therefore, the amount of glue does not become excessive and does not become too small, so that the roll product does not cause glue bleeding or insufficient adhesion.

Next, the gluing operation of the present apparatus will be described with reference to FIGS.
(1) The (I) figure of FIG. 3 is the state which received the roll product R in the kicker 4. FIG. The roll product R just wound up by a web winder (not shown) is fed into the kicker 4. Of course, the tail end of this roll product R is not yet bonded to the body of the roll product.
(2) FIG. 3 (II) shows a state in which the kicker 4 is performing a payout operation. The roll product R rolls on the inclined guide plate 3 by the dispensing operation of the kicker 4.
At the same time, the upper receiving roll 5 and the lower receiving roll 6 also start to rotate. The rotation direction and the number of rotations at this time are, for example, that the upper receiving roll 5 is counterclockwise 100 rpm and the lower receiving roll 6 is counterclockwise 70 rpm. At this time, the glue bar 1 is in the lowered position and receives glue from the nozzle 2.

(3) (III) in FIG. 4 shows a state in which the roll product R has reached between the upper receiving roll 5 and the lower receiving roll 6. When it is detected by the photoelectric switch 7a or the like that the roll product R has come between the two receiving rolls 5 and 6, for example, the rotational speed of both the receiving rolls 5 and 6 is set to the same, for example, 100 rpm, Rotate in the field, and further blow air from the air nozzle 7b to open the tail end e and spread it on the upper surface of the guide plate 3. The photoelectric switch 7b can detect that the tail end e has expanded by a predetermined dimension.
(4) (IV) in FIG. 4 continues the in-situ rotation of the roll product R and involves the tail end of the roll product R. When the photoelectric switch 7b detects that the tail end e has been caught until the protruding portion reaches a certain amount, both the receiving rolls 5 and 6 are stopped. Even at this stage, the groover 1 is still in the lowered position.
(5) As shown in FIG. 5 (V), the receiving rolls 5 and 6 are reversed (rotated in the clockwise direction) and sucked into the vacuum box 8 while feeding the tail end e. Then, both receiving rolls 5 and 6 are stopped, and the groover 1 is raised.
At this time, the kicker 4 accepts the next roll product.
(6) As shown in FIG. 5 (VI), when the upper receiving roll 5 is rotated counterclockwise while the lower receiving roll 6 is stopped, the roll product R starts to roll on the guide plate 3, and the groover 1 is sandwiched between the upper end of 1 and the upper receiving roll 5, and further passes through the upper end of the groove 1.
At this time, the glue g in the glue receiving groove 11 is transferred to the outer surface of the roll product R and glued. At this time, the kicker 4 is operating to deliver the next roll product R.

(7) As shown in (VII) of FIG. 6, the roll product R that has been glued proceeds to the lower side of the presser roll 9 and rolls off the guide plate 3. e is pressed and the tail end e is adhered to the roll body with glue. In addition, the next roll product has come between the upper and lower receiving rolls 5 and 6 at this time. The groover 1 is lowered for the next gluing operation.

  As described above, in the present embodiment, only a certain amount of glue measured by the nozzle 2 can be put on the glue receiving groove of the glue bar 1, so when the glue bar 1 is lifted and glued to the roll product R, it is excessive. A small amount of glue can be applied. For this reason, the roll product R does not cause glue bleeding or insufficient adhesion.

(A) The figure is sectional drawing of the pasting apparatus which concerns on one Embodiment of this invention, (B) A figure is the elements on larger scale of (A) figure. (A) is an explanatory view of the gluing operation in the gluing device, and (B) is a partially enlarged view of (A). (A) A figure is explanatory drawing of the acceptance state of roll products, (B) A figure is explanatory drawing of the supply state of roll products. (A) The figure is explanatory drawing of the state which unfolded the tail end of roll product, (B) The figure is explanatory drawing of the state which wound the tail end of roll product. (A) The figure is explanatory drawing of the state which raised the glue bar, (B) The figure is explanatory drawing of the state which passed the roll product and was glued. It is explanatory drawing of the state which discharged | emitted the roll product. It is explanatory drawing of the conventional web pasting apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gruber 11 Glue receiving groove 12 Doctor blade 2 Nozzle 21 Storage part 22 Discharge hole 23 Cover 24 Glue supply surface 25 Inclined supply surface 26 Vertical supply surface 3 Guide plate

Claims (3)

In a web winder that rolls a paper tube and winds the web around its circumference to produce a roll product, it is a gluing device that applies glue to adhere the web tail to the roll product after winding. There,
The gluing device includes a glue bar having a glue receiving groove at a tip portion;
A nozzle for supplying glue to the glue receiving groove of the glue bar;
A glue supply source for feeding glue to the nozzle;
Glue in a web winder, characterized in that it comprises a lifting means for raising and lowering the glue bar between a raised position where glue is applied to the roll product placed in a glued position and a lowered position lowered from the glued position. Attached equipment. The nozzle is provided with a glue supply surface for dripping the glue on the lower surface of the glue discharge hole,
2. The web winding according to claim 1, wherein the glue receiving groove of the groover is provided with a doctor blade, and the doctor blade is arranged so as to move up and down while being in contact with the glue supply surface. Gluing device in the take-up machine. The glue supply in the web winder according to claim 1, wherein the glue supply source is constituted by a fixed discharge type pump, a motor for rotationally driving the pump, and a rotation speed control device for the motor. apparatus.

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