JPS626860B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an automatic adhesive supply device, and in particular, a hot melt type solid adhesive to an adhesive storage tank of a gluing device installed in a molding device such as a corrugated box. This invention relates to an automatic adhesive supply device that supplies adhesive.

[Technical background of the invention and its problems]

When molding cardboard boxes or other containers using a molding device equipped with a gluing device that uses hot-melt adhesive, conventionally, the supply of adhesive to the adhesive storage tank of the gluing device This work was carried out manually every time something ran out, and the work was time consuming and troublesome.

Therefore, I prepared a spare adhesive in the hopper in advance,
The amount of adhesive in the adhesive storage tank is detected by a detection device, and when the adhesive is low, adhesive is automatically supplied from the hopper to the adhesive storage tank using a conveyor or other delivery means, thereby saving manpower. is possible.

However, since the adhesive has tackiness, automatic supply by such means is not necessarily easy. In particular, even if you try to store hot-melt-type fine solid adhesive that is used after melting in a hopper and then discharge it from the hopper and automatically supply it to the adhesive storage tank, the fine solid adhesive will not work while it is being stored. Moreover, the adhesive may stick to the inner wall of the hopper due to its adhesive force, or it may form into a large lump, which may clog the hopper's outlet and prevent supply.

[Purpose of the invention]

The present invention has been made in view of the above points, and an object of the present invention is to provide an automatic adhesive supply device that can easily and automatically supply a hot melt type solid adhesive and can save labor. .

[Structure of the invention]

In order to achieve the above object, the present invention includes a hopper for storing fine solid adhesive to be melted and used, a stirring device for stirring the solid adhesive in the hopper, and a vibrating tube connected to the discharge port of the hopper. a feeder having a vibrator attached thereto and discharging the solid adhesive in the hopper by vibration of a vibrating cylinder, and a conveyor receiving the solid adhesive discharged by the feeder and conveying it to an adhesive storage tank on the supplied side. and a detection device for detecting the amount of the solid adhesive stored in the adhesive storage tank on the supplied side.

With the automatic adhesive supply device having such a structure as a main part, the adhesive storage tank is provided with a supply port for receiving the solid adhesive, and a heating device is provided to melt the solid adhesive inside, and the conveyor an ejection tube that extends from the feeder to an obliquely upward direction avoiding directly above the supply port of the adhesive storage tank, and guides and carries out the solid adhesive from its tip toward the supply port. established,
Additionally, an automatic adhesive supplying device can be provided by providing a shutter that can be opened and closed at the exit at the tip of the delivery tube.

[Effect]

Inside the hopper, the fine solid adhesive is stirred by a stirring device, so it does not adhere to the inner wall of the hopper and solidify, thereby blocking the outlet of the hopper. Furthermore, the solid adhesive trying to exit from the hopper's discharge port is vibrated by the feeder's vibrator and the vibrating tube and is transported to the conveyor, so it gets clogged at the hopper's discharge port or inside the vibrating tube. Never. Then, the solid adhesive is carried out by the conveyor to the adhesive storage tank on the supplied side. The above operations are performed when the detection device detects that the adhesive in the adhesive reservoir is running low.

In addition, the tip of the conveyor is placed diagonally above the supply port of the adhesive storage tank, and a delivery tube is provided from here to the supply port, and a shutter that can be opened and closed is provided at the delivery port at the tip of the delivery tube. By opening the shutter only when transporting the adhesive to the adhesive storage tank, you can avoid the steam rising from the supply port of the adhesive storage tank by avoiding the area directly above the supply port, and the tip of the conveyor This prevents the solid adhesive from being fused to the inner wall due to heating of the unloading cylinder, and by closing the unloading port with a shutter, the steam will enter the unloading cylinder and cause the internal Solid adhesive will not melt.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

First, although not shown, the side to which adhesive is supplied by the automatic adhesive supplying device of this embodiment is
This gluing device is provided in a corrugated box molding device or other container molding device, and this gluing device is equipped with an adhesive storage tank 1.

The adhesive storage tank 1 has a supply port 3 on its upper part with a lid 2 that is opened and closed by a drive device (not shown), and also has a heating device (not shown).

The adhesive supplied by this adhesive automatic supply device is a hot melt type solid adhesive in the form of small pieces (hereinafter referred to as methyl chips) used by melting, and is heated in the adhesive storage tank 1. It is heated and melted by a device and used by being applied to corrugated paper when forming corrugated boxes and the like.

Next, the adhesive automatic supply device of this embodiment includes a funnel-shaped hopper 5 which stores the melt chips inside and has a melt chip discharge port 4 at the bottom, and a stirring device 6 which stirs the melt chips in the hopper 5. a feeder 7 which is attached to the discharge port 4 of the hopper 5 and which discharges the melt chips in the hopper 5 by vibration; a conveyor 8 which receives the melt chips discharged by the feeder 7 and conveys them to the adhesive storage tank 1; , and a detection device (not shown) for detecting the amount of melt chips stored in the adhesive storage tank 1.

The hopper 5 has a lid 11 on its upper surface that can be opened and closed, and has a telescopic tube 12 formed in the shape of a bellows made of rubber or the like at the discharge port 4.

The stirring device 6 for stirring the melt chips in the hopper 5 has a motor 13 provided at the upper opening edge of the hopper 5, and a stirring shaft 14 connected to a rotating shaft 14 of the motor 13. . Moreover, the tip of the stirring shaft 14 extends to the inside of the discharge port 4 in the hopper 5, and a plurality of stirring branches 15 are provided radially around the tip.

Further, the feeder 7 for discharging melt chips from the inside of the hopper 5 is connected to the discharge port 4 of the hopper 5.
It has a cylindrical vibrating tube 17 which is connected to the telescopic tube 12 and has a delivery port 16 at its tip and whose side of the delivery port 16 is inclined downward, and a vibrator 18 which vibrates the vibrating container 17. , the melt chips in the hopper 5 are ejected by vibration.

The conveyor 8, which receives the melt chips from the vibrating tube 17 of the feeder 7, is of a bucket type, and rises from below the outlet 16 of the vibrating tube 17 of the feeder 7.
A conveyor section 24 includes a bucket 23 rotatably disposed vertically to convey melt chips to an endless belt 22 which extends diagonally above the supply port 3 and is reciprocally driven by a motor 21. The supply port 3 of the adhesive storage tank 1 is connected from the tip of the conveyance section 24 to the supply port 3 of the adhesive storage tank 1.
It has an ejecting tube 25 which is inclined toward the direction of the adhesive tube and guides and carries out the melt chips discharged from the bucket 23 into the adhesive storage tank 1.

A stopper 26 is provided at the distal end of the conveying section 24, which abuts against the lower part of the bucket 23 moving together with the endless belt 22 and pushes the bucket 23 toward the entrance side of the delivery tube 25. Further, a shutter 29 that is opened and closed by an air cylinder 28 is provided at the outlet 27 at the tip of the carry-out tube 25 . Then, the unloading port 27 of the unloading cylinder 25
is located diagonally above and slightly shifted from directly above the supply port 3 of the adhesive storage tank 1.

On the other hand, the detection device includes a level switch 30 provided in the adhesive storage tank 1, and this level switch 30 detects the amount of melt chips that have been melted into a liquid state by the heating device. It is connected to the.

Note that this control device 31 includes the motor 13 of the stirring device 6, the vibrator of the feeder 7, the motor 21 of the conveyor 8, and the air cylinder 2.
8. It also controls a drive device that opens and closes the lid 2 attached to the supply port 3 of the adhesive storage tank 1.

Next, the operation of the apparatus of this embodiment will be explained.

First, melt chips are placed in the hopper 5 and stored in advance, and after turning on the power to the heating device of the adhesive storage tank 1 of the gluing device to sufficiently melt the melt chips inside, the main power of the molding device such as a cardboard box is turned on. At the same time, turn on the power to this device.

Then, an adhesive is applied to the corrugated paperboard by a gluing device, and a corrugated cardboard box is sequentially formed by a forming device.

When this operation is repeated and the level switch 30 detects that the adhesive in the adhesive storage tank 1 is running low, the control device 31 operates the motor 13 of the stirring device 6 to rotate the melt chips in the hopper 5. It is stirred by the stirring branch 15 of the stirring shaft 14, and at the same time, the vibrator 18 of the feeder 7
is activated, the vibrating cylinder 17 vibrates, and the extensible cylinder 12 of the discharge port 4 of the hopper 5 connected thereto vibrates and expands and contracts. Then, the melt chips in the hopper 5 fall through the telescopic cylinder 12 of the discharge port 4 of the hopper 5 into the vibrating cylinder 17 of the feeder 7 due to stirring and vibration, and are vibrated in the inclined vibrating cylinder until the melt chips reach the discharge port. 16 into the bucket 23 of the conveyor 8. The stirring device 6 and the feeder 7 operate for a certain period of time, and when a certain amount of melt chips are discharged into the bucket 23, the stirring device 6 and the feeder 7 stop operating, and the conveyor 8
The motor 21 rotates and the endless belt 22 moves the bucket 23 toward the tip of the conveyor 8. When bucket 23 comes to the tip side, bucket 2
3 comes into contact with the stopper 26 and the bucket 23
falls down, and the melt chips are transferred into the delivery tube 25. Then, the air cylinder 28 closes the shutter 2.
9 is opened, the lid 2 of the supply port 3 of the adhesive storage tank 1 is opened by the drive device, and the delivery tube 25 is opened.
Melt chips are introduced into the supply port 3 from the outlet 27 of the melt chip. And the bucket 23 is the motor 21
By the reversal of , it returns to the outlet 16 of the vibrating cylinder 17,
Shutter 29 and lid 2 are closed.

By the way, since the melt chips are stored in the adhesive storage tank 1 in a molten state by a heating device, when the lid 2 of the supply port 3 is opened, hot vapor of the adhesive is released from inside the adhesive storage tank 1. rises.
Therefore, if the hopper 5 is placed directly above the supply port 3 of the adhesive storage tank 1, there is a risk that the melt chips in the hopper 5 will melt slightly due to the heat and form a lump, causing the inside of the hopper 5 to become clogged. Furthermore, in order to avoid such problems, the hopper 5 may be installed at a position away from directly above the supply port 3 of the adhesive storage tank 1, and the melt chips may be conveyed to the adhesive storage tank 1 by the conveyor 8. ,
When the tip of the conveyor 8 is directly above the supply port 3 of the adhesive storage tank 1, the melt chips that are to be fed from the tip of the conveyor 8 into the supply port 3 will melt and adhere to the conveyor 8, and the supply of melt chips will be interrupted. There is a risk that it will not be carried out smoothly.

However, in this embodiment, the tip of the conveyor 8 is located obliquely above the supply port 3 of the adhesive storage tank 1, avoiding directly above the supply port 3, and furthermore, the conveyor 8 moves from this tip toward the supply port 3 to transfer the melt chips to the supply port. 3, and a shutter 29 that can be opened and closed is provided at the outlet 27 of this delivery tube 25, so that adhesive vapor can be avoided. The melt chips are not melted by the heat of the steam and attached to the tip of the conveyor 8, and can be smoothly conveyed into the adhesive storage tank 1.

〔Effect of the invention〕

According to the present invention, by simply storing fine solid adhesive in the hopper in advance, the solid adhesive can be automatically supplied to the adhesive storage tank on the supplied side, thereby saving labor.

In addition, since the fine solid adhesive is stirred by the stirring device and discharged by vibration by the feeder, the solid adhesive does not stick to the inner wall of the hopper or form large lumps, so the discharge port is not clogged. The solid adhesive can be smoothly discharged and automatically supplied to the adhesive storage tank.

In addition, the tip of the conveyor is positioned diagonally above the supply port of the adhesive storage tank, avoiding directly above the supply port, and a delivery tube is provided from there to the supply port, so that the solid adhesive is transported diagonally above the supply port from directly above the supply port. This avoids steam from the supply port and prevents the tip of the conveyor and unloading cylinder from being heated.
Therefore, the solid adhesive is not fused to the tip of the conveyor or the inner wall of the delivery cylinder, and the solid adhesive can be smoothly delivered to the supply port.

Furthermore, since a shutter that can be opened and closed is provided at the discharge port at the tip of the discharge tube, steam rising from the supply port will not enter the discharge tube and melt the solid adhesive in the discharge tube.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention. 1... Adhesive storage tank, 3... Supply port, 5... Hopper, 6... Stirring device, 7... Feeder, 8...
Conveyor, 17... Vibrating tube, 18... Vibrator, 25... Export tube, 27... Outlet, 29...
Shutter, 30... Level switch.

Claims (1)

[Claims] 1. A hopper for storing fine solid adhesive to be melted and used, a stirring device for stirring the solid adhesive in the hopper, and a vibrator attached to a vibrating cylinder connected to the discharge port of the hopper. A feeder that discharges the solid adhesive in the hopper by vibration of a vibrating cylinder, a conveyor that receives the solid adhesive discharged by the feeder and carries it out to an adhesive storage tank on the supplied side, and An automatic adhesive supply device comprising: a detection device for detecting the amount of the solid adhesive stored in an adhesive storage tank on the supply side. 2. A hopper that stores fine solid adhesive to be melted and used, a stirring device that stirs the solid adhesive in this hopper, and a vibrator attached to a vibrating cylinder connected to the discharge port of the hopper. A feeder that discharges the solid adhesive in the hopper by vibration, a conveyor that receives the solid adhesive discharged by the feeder and carries it to an adhesive storage tank on the supplied side, and an adhesive storage tank on the supplied side. a detection device for detecting the amount of the solid adhesive stored in the tank, the adhesive storage tank having a supply port for receiving the solid adhesive, and a heating device for melting the solid adhesive therein. The conveyor extends diagonally upward from the feeder, avoiding directly above the supply port of the adhesive storage tank, and guides the solid adhesive from its tip toward the supply port. 1. An automatic adhesive supplying device comprising: a discharge cylinder for carrying out the discharge; and a shutter that can be opened and closed at a discharge port at the tip of the discharge cylinder.