JPS60220739A - Method of forming spout of liquid paper vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention belongs to the field of liquid paper containers filled with liquid such as milk, juice, alcohol, and other soft drinks, and in which a spout is attached to the paper container. It is about the method.

(Prior Art) Conventionally, in this type of liquid paper container, means such as heat sealing or adhesives have been used to attach the spout.

(Problems to be Solved by the Invention) The above-mentioned methods such as heat sealing and adhesives require complicated or time-consuming equipment, and are not always satisfactory in mass production. It wasn't something that should have been done. Further, when the spout is attached to the outside of the insertion hole of the liquid paper container, a sealing member for the insertion hole is required to prevent the content liquid from coming into contact with the cut surface of the insertion hole.

(Means for Solving the Problems) In order to solve the above-mentioned drawbacks, the present invention uses ultrasonic welding means as a means for attaching a spout to a liquid paper container.

That is, a resin spout with a seat plate is inserted into the insertion hole of a liquid paper container whose inner surface is coated with resin from the inside, and then the paper container around the spout that protrudes outward is inserted into the insertion hole of the liquid paper container. Welding is performed from the outer surface using ultrasonic welding means.

(Example) The carton of the liquid paper container (m) used in the method of the present invention is mainly made of paper, and the inner surface is coated with aluminum and synthetic resin, and the outer surface is coated with synthetic resin. is not necessarily necessary. Also, the spout (
n) is injection molded from synthetic resin.

Next, an apparatus for carrying out the method of the invention will be described with reference to the drawings.

First, a series of devices including a device for attaching a spout to a paper container for carrying out the method of the present invention will be explained.As shown in FIG. Rotary table part for bottom assembly and welding (b),
Take-out part of the assembled paper container (C), intermittent transfer part of the paper container (d), supply part of the spout (e) welded part of the spout (f), top assembly part of the primary paper container (g)
, the part where the liquid content is filled into the paper container (h), the top assembly part of the secondary paper container (i), the top heating part of the paper container (j)
, a top welded part (k) of the paper container, and a rotary table part (J) for discharging the filled liquid paper container.

The device for carrying out the method of the present invention, ie, the device (A) for welding the spout to the liquid paper container, corresponds to the welded portion (f) of the spout in the series of devices described above.

In this spout welding device (A), in order to weld the spout (n) to the paper container (m),
It is necessary for the paper container (m) to be transferred to the welding device (A) and for the spout (n) to be supplied to the transferred paper container (m), and this is done as follows.

The carton supplied from the carton supply part (a) is
Rotary table part for assembling and welding the bottom of the carton (
The assembled paper container (m) is taken out at the take-out part (C) and placed in a holding frame ( 2)
is held and transferred by the supply device (B) of the spout (n).
leading to.

The supply device (B) of the spout (n) in this example
), the insertion operation of the teno spout (n) into the insertion hole of the paper container (m) is due to the reciprocating movement of the air cylinder, but this does not necessarily depend on such fluid pressure.
Other means for obtaining the information include forward and reverse rotation of the screw by rotation of a motor, reciprocating of the rack, pinion gear, cam, etc.

The supply gutter (
4), at its lower end there is a stop (5),
The pouring spout (n) that flows down stays at this stop (5), and the sucker (6) that continues upwards stops at the spout (n).
is provided on a T-shaped holding member (7) at a position facing the lower end stop (5) of the supply gutter (4), and this holding member (7) has two sliding rods. (8) and (9) are attached, which are the two fixed to the machine frame (10).
two guide members (11) (11”) and (12), (1
2').

A connecting piece (14) is fixed diagonally to the connecting rod (13) of the guide member (11) (11°), and an air cylinder (15) with a small stroke and an air cylinder with a large stroke are attached to the upper and lower ends of the connecting rod (13). (16) are connected via connecting members (17) and (17'). The other ends of these air cylinders (15) and (16) are located at the same position and are connected to each other via a T-shaped connecting piece (18), and horizontal portions on both sides of the T-shaped connecting piece (18) are connected to each other through a T-shaped connecting piece (18). Sliding rod (8)
, (9) are fixed therethrough.

The welding device (A) for the spout to the paper container is a sucker (
The welding device main body (S) is arranged at the same height as the supply device (B) for the spout (n) according to 6), and consists of a converter (19), a booster (20), and a horn (21).
) is connected to the air cylinder (24) by a connecting rod (23) extending downward, and slides along guide rods (25), (25) supported by the machine frame (10). It has become. However, the reciprocating movement of the welding device main body (S) does not necessarily depend on the fluid pressure of an air cylinder, etc., as described in the case of the feeding operation of the spout (n) to the paper container (m) by the sucker (6). Of course, this can also be achieved by, for example, rotating a screw in the forward and reverse directions by rotating a motor, reciprocating a rack, a pinion gear, a cam, etc.

A recess (22) into which the spout (n) can fit is provided at the tip of the horn (21).

The elevating device (C) of the paper container (m) relative to the supply device (B) of the spout (n) and the welding device (A) is located at a position corresponding to the holding frame (2) of the body of the paper container (m). Yes, there is a paper container (
It consists of a support plate (26) that supports the bottom of the paper container (m), a bent press plate (27) that presses the upper side of the opening of the paper container (m), and an air cylinder (28) that raises and lowers these. (26) The push plate (27) has a length that allows it to act simultaneously on the paper container (m) when supplying and welding the spout (n) to the paper container (m). ) consists of one wide part (27°) and two narrow parts (27"). This wide part (27') is on the supply side of the spout (n), Further, the narrow portion (27'') acts simultaneously on the adhesive side of the spout (n).

The support plate (26) and the push plate (27) are connected to the connecting rod (29) and (
30) is connected to an air cylinder (28), and is raised and lowered in response to the holding frame (2) of the paper container (m) that is intermittently transferred.

The bent push plate (27) may be located on the opposite side (left side) of the support plate (26) in the one shown in FIG.

Moreover, above the holding frame (2) of the paper container (m) attached to the conveyance chain (1), (1°), at a position corresponding to the supply device (B) of the spout (n), A fixed holding frame (31) that holds the paper container (m) from its outer periphery is protruded from the upper machine frame (10), and at a position corresponding to the welding device (A) of the spout Ln), Upper machine frame (10)
A fixed holding member (32) that fits inside and holds the paper container (m) is provided in a protruding manner.

This fixed holding member (32) has a groove (32'>(
32°) is provided.

Next, the operation of the apparatus for carrying out the method of the present invention explained above will be explained.

■ The carton supplied from the carton supply section (a) is assembled into a paper container (m) at the bottom assembly and welding rotary table section (b), and is taken out from the take-out section (c), and the conveyor chain (1), (1”) holding frame (
2) and is intermittently transferred to reach the lower part of the supply device (B) of the spout (n).

(2) The spout (n) from the reservoir plate (3) flows down in the supply gutter (4), reaches the stop (5) at the lower end, and waits there.

■ In Figure 3, the cylinder with a large stroke (
16), the T-shaped connecting piece (1
The sliding rods (8) and (9) fixed via the guide members (11) (11') and (12), (1
2') as a guide to slide backwards (to the right). A sucker (6
) is in contact with the mounting plate (n”) of the spout (n),
Adsorb this. Next, due to the reverse action of the air cylinder (16) with a large stroke, the sucker (6) holds the holding frame (2) of the paper container (m) while adsorbing the spout (n).
) return to the center position.

■ It is intermittently transferred to the supply device (B) of the spout (n).
), the paper container (m) is pushed through the connecting rod (29) by the action of the lower air cylinder (28) until the top edge of the opening reaches the first stage X position. The insertion hole of the paper container (m>) is raised, and the insertion hole of the paper container (m>) faces the position of the spout (n) that is attracted to the sucker (6).

■ Due to the action of the air cylinder (15) with a small stroke, similar to the case of the air cylinder (16) with a large stroke, the sliding rods (8) and (9) slide backward (to the right). , the spout (n) is inserted into the insertion hole of the paper container (m), the sucker (6) stops suctioning, and returns to its original position by the action of the small air cylinder (15).

■ The connecting rod (
30), the wide part of the bent part of the push plate (27) <27
' ), press the upper side of the opening of the paper container (m) into which the pouring spout (n) has been inserted, and pull it down to the second stage Y position.

■ The paper container (m) with the spout (n) inserted is attached to the holding frame (
2), the paper container (m) is fed one pitch in a direction perpendicular to the paper surface, and the paper container (m) is fed through the spout (n) as shown in FIG.
) to the position corresponding to the welding device (A).

■ As shown in Figure 6, the lower air cylinder (28)
Due to this action, the paper container (m) is pushed up by the support plate (26) via the connecting rod (29) and fitted onto the outer periphery of the fixed holding member (32), and the upper side of the opening is located at the third stage. When the spout (n) reaches the position X'', the spout (n) is connected to the horn (2
It faces the concave portion (22) of 1). In this case, the push plate (2
The two narrow portions (27'') of the bend 7) rise within the longitudinal a (32') of the fixed holding member (32).

■ The welding device body (S) of the spout welding device (A) is
By the action of the air cylinder (24) below,
Guide rods (25), (2) supported by the machine frame (10)
5) to the front (to the left), fit the recessed part (22) at the tip of the horn (21) into the spout (n), and press the paper at the periphery of the end of the recessed part (22). Pour spout (n) of container (m)
) Press the periphery of the insertion hole.

Here, the mounting seat plate (n) of the spout (n) is moved by the horn (21) via the converter (19) and the brewster (20) by ultrasonic waves from an external ultrasonic oscillator.
Heat and weld to the inner surface of the paper container (m).

[Phase] By the opposite action of the air cylinder (24), the welding device main body (S) of the spout returns to its original position.

■ Due to the action of the lower air cylinder (28), the push plate (
The two narrow width portions (27'') of the bent portion 27) lower the opening top side of the paper container (m) from the position of the third stage X' to the original position of the fourth stage Y'.

■ The paper container (m) with the spout (n) welded to it is intermittently transferred by the holding frame (2) of the conveyor chain (1) in a direction perpendicular to the paper surface, and enters the next process of folding the top of the container. .

As described above, the intermittent transfer and elevation of the paper container (m), and the supply and welding of the spout (n) to the paper container (m>) are repeatedly performed in a well-timed manner.

Furthermore, the spout may be manually inserted into the insertion hole of the paper container from the inside and welded from the outside using an ultrasonic welding device.

(Effects of the Invention) As can be understood from the device and its operation as explained above, the method of the present invention is to insert the spout from the inside into the insertion hole of the liquid paper container and project it outward. Then, while maintaining this state, the horn of the ultrasonic welding device is brought into contact with the paper container around the protruding spout from the outside, and the spout is heated and welded to the paper container by ultrasonic vibration. Because we have taken this method, it is possible to weld much more easily and quickly than conventional heat sealing or adhesives, and since heat is generated by ultrasonic vibration only in the areas necessary for sealing, there is no damage to the resin due to heat. The generation of unpleasant odors can be minimized, and since the horn of the ultrasonic welding device does not come into direct contact with the spout, there is no vibration damping.
Good welding can be performed in a short time.

[Brief explanation of the drawing]

Figure 1 (a) is a perspective view of a liquid paper container with a spout attached;
(B) is a perspective view of the pouring spout, FIG. 2 is a schematic plan view of a series of devices for assembling a paper container from a carton, attaching a spout, filling it with liquid and sealing it, and FIG. 3 is a method of the present invention. Fig. 4 is a plan view of the main part with a part of the same as above removed, Fig. 5 is a right side view of a part of the same as above, and Fig. 6 is a note on the same as above. FIG. 7 is a front view of the exit welding device, FIG. 7 is a left side view of the same, and FIG. 8 is a right side view of the same. Symbol A: Welding device for spout to paper container B: Spout supply device for paper container C: Lifting device for paper container S: Welding device body m: Liquid paper container n. ... Outlet 1 ... Conveyance chain 2 ... Holding frame 3 ... Reservoir 4 ... Supply gutter 5 ... Stop part 6 ... Sucker 7 ... T-shaped holding member 15. ...Small stroke air cylinder 16...
Air cylinder with a large stroke 19... Converter 20... Booster 21... Horn 22... Concave portion 24... Air cylinder 26... Support plate 27... Push plate 27゛... Wide portion 27"...Narrow width portion 28...Air cylinder 29...Connecting rod 30...Connecting rod 31...Fixed holding frame 32...Fixed holding member 32''...Groove Fig. 7 Fig. 8

Claims (1)

[Claims] (11) Insert a resin pouring spout with a seat plate from the inside into the insertion hole of a paper container for liquid whose inner surface is coated with resin, and while maintaining that state, A method for attaching the spout of a paper container for liquids, which is characterized by bringing an ultrasonic welding device into contact with the paper container and welding the spout to the paper container using ultrasonic vibrations. (2) The paper container for liquids has a lower bottom assembled. (3) Ultrasonic welding for attaching the spout of a liquid paper container according to claim 1, characterized in that the spout is welded. 2. A method for attaching a spout to a liquid paper container according to claim 1, wherein the spout is attached by pressing from the outer surface of the liquid paper container at a portion from which the outlet protrudes.