JP2003154585A - Apparatus for extracting paper container from filling machine for paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper container extracting apparatus which can improve hygienic properties and sureness of the extraction. SOLUTION: The paper container extracting apparatus 10 of a filling machine for the paper container in which the paper container 1 after its bottom part being molded by a mandrel 2 is extracted and transferred to a bottom rail is provided with a holding arm having a holding part 51 for holding the bottom part of the container 1 at the tip, an ascending/descending actuator 53 main body fitted with the holding arm 52 upward/downward movably, and an air nozzle 55 for removing the container 1 from the mandrel 2 by air pressure. The holding arm 52 is moved up/down between a descending position below the bottom rail and an ascending position separated at a prescribed distance from the mandrel 2 through the actuator 53 main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper container filling machine in which forming, filling, and sealing stations are sequentially provided, and a paper container having a molded bottom is transferred from a mandrel to a bottom rail. Regarding the pulling device.

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, a paper container withdrawing device for a paper container filling machine of this type forms a bottom portion of a paper container 1 by heat sealing while a mold called a mandrel 2 rotates. After that, when the mandrel 2 is located at the lower limit of rotation, the mandrel 2 is disposed immediately below the mandrel 2, and the paper container 1 whose bottom has been molded by the mandrel 2 is sucked, removed from the mandrel 2, and transferred to the bottom rail 3. .

At this time, the conventional paper container drawing device is shown in FIG.
0, as shown in FIG. 11, a vacuum pad 11 is attached to the tip.
1 is composed of a suction pipe 112 having a puller 113, and an actuator (not shown) that drives the puller 113 up and down.

When the paper container 1 is supplied to the mandrel 2 and the bottom is formed, the cam 113 (not shown) raises the puller 113 to bring the vacuum pad 111 into close contact with the bottom of the paper container 1 and the suction pipe 112. The bottom portion of the paper container 1 is attracted to the vacuum pad 111 by the suction force of the air flowing inside. In this state, the puller 113 is lowered by the action of the cam to remove the paper container 1 from the mandrel 2, and the paper container 1 is transferred to the bottom rail 3 while the puller 113 is being lowered.

[0005]

By the way, in this type of paper container pulling apparatus, as shown in FIG.
In order to suck the paper, attach the vacuum pad 111 to the paper container 1
However, when the paper container 1 is not supplied to the mandrel 2, the vacuum pad 111 must not contact the mandrel 2 in order to prevent the inner surface of the paper container 1 from being contaminated.

Therefore, as shown in FIG. 10, it is necessary to precisely set the gap G between the vacuum pad 111 and the mandrel 2, but the thickness of the bottom of the paper container 1 is about 1.0 m.
Since it is m or less, it is difficult to set the gap G. On the other hand, if the gap G is set to be larger than the thickness of the bottom of the paper container 1 to prevent contamination, the suction force of the vacuum pad 111 becomes uncertain. There was a problem that suction power was required.

The present invention was devised in order to solve the above-mentioned conventional problems, and does not require the work of precisely setting the clearance adjustment between the vacuum pad and the mandrel, and improves hygiene. It is an object of the present invention to provide a paper container pulling device for a paper container filling machine, which is capable of improving the reliability of the separation of the paper container from the mandrel.

[0008]

In order to achieve the above object, the invention of claim 1 is a paper container of a paper container filling machine for pulling out a paper container having a bottom formed by a mandrel and transferring it to a bottom rail. A pulling device, wherein the paper container pulling device has a holding arm having a holding portion for holding a bottom portion of the paper container at a front end thereof, and a lifting actuator main body into which the holding arm is vertically movably fitted. In addition, the holding arm comprises an air nozzle for pneumatically detaching the paper container from the mandrel, and the holding arm has a predetermined distance from the lower position of the bottom rail and the mandrel via an elevating actuator body. While moving up and down between the mandrel and the ascending position, the paper container is separated from the mandrel by the air pressure discharged from the air nozzle. Characterized in that it descends to the holding unit in the raised position of the holding arm by.

According to a second aspect of the invention, there is provided the paper container withdrawing device for the paper container filling machine according to the first aspect, wherein the air discharged from the air nozzle is raised to a predetermined raised position by the holding portion of the holding arm. After that, discharge is started. Then, the discharge is stopped after the paper container is detached from the mandrel and transferred to the holding portion of the holding arm.

A third aspect of the present invention is the paper container drawing device of the paper container filling machine according to the first aspect, wherein at least one air nozzle is provided.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a paper container drawing apparatus according to the present invention will be described below.

First, the outline of the molding, filling, and sealing stations in the embodiment of the present invention will be described with reference to FIGS. 4 and 5. The same components as those in the conventional example will be described using the same reference numerals.

As shown in FIG. 4, a molding station 30.
Then, after the bottom of the paper container 1 is formed by heat sealing by a mold called a mandrel 2 arranged in a plane where the tubular paper packaging material 31 intersects the conveyor 3 at 90 degrees, it is shown in FIG. Thus, it is lowered by the paper container pulling device 10 and supplied onto the conveyor 3. In this state, the paper container 1 is a container without a lid and having a bottom, for example, a container capable of filling an internal solution such as milk or soft drink.
Since the paper container and the mandrel are held by a tool such as a paper clip (not shown), they do not shift when the mandrel rotates. In FIG. 6, the situation in which the bottom surface of the paper container is formed is shown in four stages for easy understanding.

Next, the paper container 1 is sent to the filling station 34 in the next step by the conveyor 3, and the content liquid is filled in the paper container 1 from the filling nozzle.

At this filling station 34, the paper container 1
Before the filling of the content liquid is started, the paper container 1 is lifted upward until the tip of the filling nozzle comes close to the bottom of the empty paper container 1, and the filling of the content liquid is started. Then, the paper container 1 descends while being filled with the internal solution. This is to always keep the drop drop when the inner solution is filled, to prevent the inner solution from jumping and to prevent bubbles from forming as much as possible.

The paper container 1 thus filled with the internal solution is
It moves on the conveyor 3 and the upper part of the paper container 1 is the heater 35.
After being heated at, it is sent to the sealing station 36.

At the sealing station 36, the upper portion of the paper container 1 is compressed into a desired shape by a sealing machine 37 and sealed, and the final shape filled with the content liquid is as shown in FIG.
Is formed. The paper container has a structure in which a thermoplastic resin is used for the outer layer 61 and the inner layer 66 to cover the paper layer 62 as shown in FIG. 7, for example. Further, by forming a fold line as shown in FIG. 8 on the plane of the packaging material of the paper container in advance, when the packaging material is folded, it can be easily formed into a desired shape.

Next, the paper container drawing device 10 will be described.

As shown in FIG. 1, the paper container pull-out device 10 has a holding portion 51 for holding the bottom portion of the paper container 1 at the tip.
The holding arm 52 is provided with an actuator 53 having an air cylinder 54 into which the holding arm 52 is vertically movably fitted.

Air supply / exhaust ports for supplying / exhausting compressed air are provided respectively on an upper wall and a lower wall (not shown) of the air cylinder 54, and these air supply / exhaust ports are respectively connected to a compressed air supply device (not shown). .

Then, at the same time when the paper container having the bottom formed on the mandrel 2 arrives, the holding part rises so as to arrive just below the mandrel. That is, the holding arm 52 is supplied with compressed air from the air supply / exhaust port to the air cylinder 54, and moves upward through the piston 1 (not shown) to be positioned at a rising position separated from the mandrel by a distance Y.

Therefore, the holding portion 51 is positioned with a predetermined distance Y from the mandrel 2, and the mandrel 2
Never come into contact with.

Next, since air is ejected from the two air nozzles 55 to the mandrel 2 and air pressure is generated in the gap between the mandrel 2 and the paper container 1, the paper container is detached from the mandrel and is held on the holding portion 51. Descend to. At this time, since the paper container and the mandrel are only held by a tool such as a paper clip (not shown) with a slight force, the paper container can be easily separated from the mandrel with a desired air pressure. The holder 51 can hold the paper container by a holder (not shown).

In this state, compressed air is supplied to and exhausted from the air supply / exhaust port (not shown) of the air cylinder 54.
The holding arm 52 is lowered via a piston (not shown), and the paper container 1 is transferred to the bottom rail 3 during the lowering. The holding unit releases the paper container at the same time when the paper container arrives at the bottom rail. In this manner, the paper containers are successively transferred to the holding section at the same timing as the different mandrels arrive one after another. Of course,
Sometimes the mandrel arrives without the paper container, but even then, the operations of the air nozzle and the holding arm do not have to be stopped and they are continuously performed.

The present invention is not limited to the above-mentioned one embodiment, but various modifications can be made based on the gist of the present invention, and they are not excluded from the scope of the present invention. For example, the raising and lowering of the holding arm does not necessarily have to be performed by the air cylinder, and it is also possible to perform the vertical reciprocating movement by the action of the rotating cam linked to the rotation of the mandrel, and there is no particular limitation on the actuator system.

[0025]

As is apparent from the above description, claim 1
According to the invention, since the holding arm is made to stand by at the raised position having a predetermined distance from the mandrel via the lifting actuator body, a predetermined distance is formed between the mandrel and the holding portion, so that the holding portion Does not touch the mandrel. Therefore, contamination by the mandrel inside the paper container is prevented and hygiene is improved. Further, since the air pressure by the air nozzle is used, the paper container can be easily detached from the mandrel. Furthermore, since the air pressure to be sprayed also cleans the inside of the paper container, a hygienic effect of blowing away dust and the like adhering to the paper container can be expected.

According to the invention of claim 2, in addition to the same operation as that of the invention of claim 1, the air discharged from the air nozzle is not always discharged, but the holding portion of the holding arm has a predetermined shape. Since the discharge is started after the paper container is lifted to the rising position and the paper container is detached from the mandrel and transferred to the holding portion of the holding arm, the air consumption is small.

According to the third aspect of the present invention, in addition to the same effect as that of the first aspect of the present invention, at least one air nozzle is provided, so that air is discharged into the gap between the paper container and the mandrel and the air pressure is increased. Since the paper container is full, the paper container can be separated from the mandrel and lowered to the holding portion.

[0028]

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a paper container drawing device according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a state where the paper container is lowered in the paper container drawing device according to the embodiment of the present invention.

FIG. 3 is an explanatory view showing a state in which the paper container drawing device according to the embodiment of the present invention is lowered.

FIG. 4 is a schematic explanatory diagram of a bottom surface forming device for a paper container in an embodiment of the paper container.

FIG. 5 is a schematic explanatory diagram of each station of molding, filling, and sealing in one embodiment of the paper container.

FIG. 6 is a diagram illustrating steps of forming a bottom surface of a paper container according to an embodiment of the paper container.

FIG. 7 is a cross-sectional explanatory diagram of a packaging material for a paper container.

FIG. 8 is a plan view of a polygonal line formed on the packaging material of the paper container.

FIG. 9 is a perspective view of a paper container.

FIG. 10 is a schematic explanatory view showing a conventional paper container drawing device.

FIG. 11 is an explanatory view showing a state where the puller is in contact with the paper container in the conventional paper container drawing device.

[Explanation of symbols]

1 paper container 2 mandrels 3 bottom rail 10 Paper container pulling device 11 vacuum pad 21 Support member 51 holding part 52 Holding arm 53 Lifting actuator 54 air cylinder 55 Air nozzle 56 air

Claims (3)

[Claims] 1. A paper container withdrawing device for a paper container filling machine that draws out a paper container whose bottom has been molded with a mandrel and transfers it to the bottom rail, wherein the paper container withdrawing device has A holding arm having a holding portion for holding the bottom portion, and an elevating / lowering actuator main body for fitting the holding arm in a vertically movable manner, and an air nozzle for detaching the paper container from the mandrel by air pressure. The holding arm is moved up and down between the lower position of the bottom rail and the upper position with a predetermined distance from the mandrel via the lifting actuator body, and the paper container is discharged from the air nozzle. Is separated from the mandrel by the air pressure to move down to the holding portion at the raised position of the holding arm. Paper containers withdrawal device of the paper container filling machine. 2. The paper container withdrawing device of the paper container filling machine according to claim 1, wherein the air discharged from the air nozzle is discharged after the holding portion of the holding arm has risen to a predetermined rising position. Then, the paper container pulling-out device is characterized in that the paper container is detached from the mandrel and transferred to the holding portion of the holding arm, and then the ejection is stopped. 3. A paper container drawing device for a paper container filling machine according to claim 1, wherein the air nozzle is at least 1.
A paper container withdrawing device for a paper container filling machine, which is provided individually.