JPS5846965Y2 - Paper container heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a paper container heating device that heats the location where the spout of a paper container coated with a thermoplastic resin film is to be attached.

Recently, paper containers have been used not only for milk and juice but also for sake.In order to make it easier to open and pour out the contents from these paper containers,
It has been proposed to attach a spout to a paper container, and spout attachment devices are being developed.

Among the devices that make up this spout attachment device, the paper container heating device that heats the location where the spout is to be attached on the paper container is particularly
Prior to adhering the spout to the intended location, the thermoplastic resin coating is heated and melted, and in order to ensure secure adhesion, the location must always be heated at the optimum temperature. Accuracy is required.

In view of the above points, the present invention provides a paper container heating device that can always heat the location where the cap is to be bonded on the paper container at the optimum temperature for bonding the cap. The present invention is characterized in that a heater is integrally provided on the abutting member that abuts near the intended position for adhering the spout, and the heater is set at a position retracted from the tip of the abutting member.

The present invention will be explained below with reference to illustrated embodiments. Fig. 1 is a plan view of the entire spout attachment device using the paper container heating device according to the present invention, and Fig. 2 is a front view of Fig. 1. .

Reference numeral 1 denotes an auxiliary conveyor, which conveys a large number of paper containers P filled with contents by a filling device (not shown) along arrow A.

Reference numeral 2 denotes a transfer conveyor that receives paper containers P via a transfer device 3 at the terminal end of the auxiliary conveyor 1, and transfers these paper containers P for attaching a spout.

While the paper containers P are being conveyed by the auxiliary conveyor 1, the intervals between them are not necessarily constant and they move at irregular intervals, but the paper containers P are transferred from the auxiliary conveyor 1 to the transfer conveyor 2 by the transfer device 3. At the same time, they can be spaced apart from each other by a predetermined distance.

That is, the paper containers P are placed on the transfer conveyor 2 at regular intervals, and the support pieces 10 are placed upright on the conveyor 2.
A paper container preheating device 4, a paper container heating device 5, and a plug pressing device 6 are provided above the transfer conveyor 2 along the transfer direction (these are all shown in FIG. 1 for convenience). (not shown) to which the spout is attached and transported in sequence in the direction of arrow B.

In this embodiment, the plugs are attached to two paper containers at the same time; the preheating device 4, the paper container heating device 5,
Two spout pressing devices 6, two spout supply units 7, two spout transfer devices 8, and two spout heating devices 9, which will be described later, are provided.

Of these, the preheating devices 4, 4, the heating devices 5, 5, and the plug pressing devices 6, 6 are fixed to a mounting frame 11 provided in parallel on the transfer conveyor 2, and the installation intervals between these devices are determined according to each paper container P.
The interval is set to be the same as that of .

The transfer conveyor 2 is configured to intermittently transfer the paper container P so as to stop for a certain period of time when the paper container P is located below the preheating device 4, the heating device 5, and the plug pressing device 6.

The transfer device 3 includes a first transfer cylinder device 12, a stop cylinder device 13, and a second transfer cylinder device 14, which are arranged in this order from the upstream side of the auxiliary conveyor 1.

Each of these cylinder devices 12.13.14 has screws that can move forward and backward in the width direction of the auxiliary conveyor 1, and the screws of the transfer cylinder device 12.14 are used to transfer paper containers P to the auxiliary conveyor. Push-out members 15 and 17 are attached to transfer paper containers P from 1 to the transfer conveyor 2, and a stop member 16 that can interfere with the paper containers P on the auxiliary conveyor 1 is fixed to the piston of the stop cylinder device 13. .

The transfer device 3 operates as follows to transfer the paper container P to a predetermined position on the transfer conveyor 2.

That is, first, the stop member 16 protrudes onto the auxiliary conveyor 1 to stop the first paper container P, and at this time, the push-out member 15 of the first transfer cylinder device 12 retracts from above the conveyor 1 to stop the second paper container P. The container P is brought into contact with the paper container P at the top.

Next, the pushing member 15 protrudes to transfer the second paper container P onto the transfer conveyor 2, and at the same time, the stopping member 16 retracts to release the first paper container P.

This leading paper container P is transferred by the auxiliary conveyor 1 to the front of the pushing member 17 of the second transfer cylinder device 14,
Then, it is transferred to the transfer conveyor 2 by this extrusion member 17.

In this way, two paper containers P are placed on the front surface of each support piece 10.

It should be noted that during the transfer operation of the transfer device 3, the transfer conveyor 2 is stopped, and during this time, the heating of the paper container and the operation of attaching the spout, which will be described later, are performed.

Below, we will explain each device that performs the work of attaching a spout to a paper container P. FIG. 3 is a front view of a preheating device 4 and a paper container heating device 5 according to the present invention, and FIGS. 4 and 5 are respectively A side view of the preheating device 4 and the heating device 5 is shown.

The preheating device 4 preheats the paper container before the heating device 5 heats the location where the spout is to be attached to the paper container.
9, and a preheating section 20 that is supported by this Shinonda device 19 so as to be movable forward and backward.

Reference numeral 21 denotes a substrate 18 for guiding the forward and backward movement of the preheating section 20.
A guide member with a U-shaped cross section attached to the top of the cylinder device 1
A prismatic member 22 connecting the piston rod 9 and the preheating section 20 is slidably supported.

The prismatic member 22 has a groove 23 that can be engaged with an operating portion 24a of a limit switch 24, which will be described later, along the forward and backward direction of the prismatic member 22.
Further, the upper end of this groove portion 23 is deepened to form a guiding slope 23a of the operating portion 24a.

Thus, the preheating section 20 has an air outlet 25 at its tip facing the shoulder S, which is the intended position for attaching the spout of the paper container P, and heats the air sucked in from the suction opening 26 to
5, hot air is blown onto the container shoulder S.

That is, the preheating section 20 includes an electric heater and a blower fan therein, and the power supply to these is controlled by the limit switch 24 provided on the board 18.
A limit switch operating section 24 as shown in FIG.
When a and the groove portion 23 of the prismatic member 22 are in a non-interfering state, hot air is emitted from the air outlet 25.

Note that the air outlet 25 can get close enough to almost touch the shoulder S of the paper container, and the size of the paper container P,
If the shape changes, for example, the prismatic member 22 may be replaced with a predetermined one and their relative positions may be adjusted.

Further, the board 18 has an arc-shaped elongated hole 2 bored in the mounting frame 11.
7 via a bolt 28, by changing the fastening position of this bolt 28, the inclination angle of the entire preheating device 4, that is, the facing state of the outlet 25 and the container shoulder S can be changed and adjusted. It is possible.

The paper container heating device 5 has basically the same configuration as the preheating device 4, but the heating section 2 corresponding to the preheating section 20 is
9 have different configurations.

That is, the heating unit 29 has an electric heater 30 at a portion facing the shoulder S of the paper container, and heats it by applying electricity to bring it close to the shoulder S, thereby heating the thermoplastic resin coating at the position where the spout is to be attached. It is supposed to melt.

As for the other configuration, like the preheating device 4, the board 31 is supported by the mounting frame 11. It includes a Shinonda device 32 fixed to the substrate 31, a guide member 33, a limit switch 34, and a prismatic member 35 that connects the cylinder device 32 and the heating section 29.

Similarly to the prismatic member 22 of the preheating device 4, this prismatic member 35 has an operating section 34 of the limit switch 34.
A groove portion 35a that can be held at
When the state is such that there is no interference with the heating section 29, the heating section 29 is energized.

6 to 8 are enlarged views showing the heating section 29. As shown in FIG.

Reference numeral 61 denotes a support member having a flange 61a for attachment to the prismatic member 35, short insulating members 62 and 62 made of Bakelite are fixed to both sides of the support member 61, and conductive material such as brass is fixed to both sides of the support member 61. The insulating member 62 consists of
．． A contact member 63.63, which is longer than 62, is attached.

Each abutment member 63.63 has a respective inner surface 63b
, 63b, the end of the heater 30 is attached to the heater 30, and the heater 30 has an annular portion 3 having approximately the same shape as the attachment point of the spout.
0 a, and this annular portion 30 a and the support member 6
A heat insulating material 64, such as asbestos, is inserted between the first tip and the other end.

The annular portion 30a is set at a retreating position from the abutting surface 63a at the tip of the abutting member 63, and when the abutting surface 63a is brought into contact with the paper container shoulder S, the annular portion 30a The portion 30a faces this shoulder portion S with a constant distance maintained therebetween.

Furthermore, reference numeral 65 denotes a cooling hole that penetrates the support member 61 in the horizontal direction, and this cooling hole 65 is connected to a cooling hole 66 formed by vertical holes 66 a and 66 a and a horizontal hole 66 b bored in the abutting member 63 . They are connected by communication pipes 67 and 68, and cooling water is circulated through these holes 65 and 66 to cool these support members 61 and contact members 63, and the paper container P
This prevents excessive heating of areas other than the intended installation location of the spout.

Further, 69 is a lead wire for supplying power to the heater 30.

While the preheating device 4 and the heating device 5 are heating and melting the intended location of the spout on the paper container P, the synthetic resin spout to be attached to the paper container P is heated at its adhesive portion via the device described below. is heated and sent directly above the paper container P on the transfer conveyor 2.

That is, as shown in FIGS. 9 and 10, the transfer member 36 of the spout transfer device 8 is supported so as to be movable forward and backward along the guide rail 37. The spout C is stopped directly above the spout heating device 9, heated, and then transferred to the paper container P side on the transfer conveyor 2.

Reference numeral 38 denotes a pair of plug gripping claws pivotally connected to the transfer member 36, and gears 39.38 that mesh with each other are attached to these supporting points.
39, and the tip of a screw I/rod 41 of an expansion/contraction cylinder device 40 attached to the transfer member 36 is fixed to one of the pair of gripping claws 38.

Therefore, when the cylinder device 40 is driven to move the piston rod 41 forward and backward, the plug gripping claw 38 expands and contracts.

The spout gripping claw 38 is set with its tip facing diagonally upward, and the angle of inclination thereof is approximately parallel to the shoulder S of the paper container.

As shown in FIGS. 11 and 12, the spout supply section 7 is composed of a spout chute 42 having an inclination angle such that it forms the same plane as the spout gripping claw 38.
2 includes a guide plate 43 that covers both sides of the adhesive large diameter portion of the spout C, and a discharge regulating plate 44 that is provided at the tip of the guide plate 44 and restricts the discharge direction of the spout C in the lateral direction.

Further, the spout chute 42 is provided with a spout drop prevention claw 45 that is swung by a cylinder device 45', and while the spout C is being taken out by the spout gripping claw 38, it prevents the subsequent spout from falling. This makes this removal operation easier.

This prevention claw 45 is always urged inward to the plug chute 42, but is opened by the cylinder device 45' after the lowermost plug is removed.

Note that the ejection position of the spout C matches the height position of the spout gripping claw 38, so that the spout C can be taken out laterally.

Next, the spout heating device 9 heats the back surface of the adhesive large diameter portion of the spout C held by the spout gripping claw 38 of the spout transfer device 8, and is installed during the transfer process of the transfer member 36. It is being

As shown in FIG. 13, this plug heating device 9 includes a cylinder device 47 attached to a support frame 46.
It has a configuration in which a heating section 48 is connected to a piston rod 7.

Of course, the angle is set so that the end face of the heating part 48 directly faces the adhesive large diameter part of the spout C.

The spout C heated by the spout heating device 9 is further transferred by the spout transfer device 8 and delivered to the spout pressing device 6.

As shown in FIGS. 14 and 15, this plug pressing device 6 has a structure similar to that of the preheating device 4 and heating device 5 described above.

That is, 49 is a board attached to the mounting frame 11, and this board 49 includes a pressing cylinder device 50, a guide member 52 that guides the reciprocating movement of a prismatic member 51 connected to the piston thereof, and a guide member 52 that guides the reciprocating movement of a prismatic member 51 connected to the piston of the pressing cylinder device 50. A limit switch 53 interlocked with is fixed.

An expansion/contraction cylinder device 54 is fixed to the upper side of the prismatic member 51, and a pair of plug holding claws 55 are pivotally attached to the lower end of the prismatic member 51. One of the holding claws 55 is is connected to the piston of the cylinder device 54.

The pair of plug holding claws 55 are provided with gears 56 and 5 that mesh with each other, similarly to the plug holding claws 38, at the pivot portions of the pair of plug holding claws 55, respectively.
Therefore, by driving the expansion/contraction cylinder device 54, the plug holding claw 55 expands and contracts to grip and release the plug C.

When the spout pressing device 6 is not in operation, the height position of the spout holding claw 55 matches the tip height of the spout gripping claw 38 of the spout transfer device 8. The spout C delivered from the transfer device 8 is lowered by the action of the pressing cylinder device 50 and pressed onto the shoulder S of the paper container.

At this time, the limit switch 53 is released by the prismatic member 51, thereby driving the expansion/contraction cylinder device 54 and releasing the plug holding claw 55.

A pair of paper container support members 57 are swingably supported on a support base 58 via pins 59, and are driven by cylinder devices 60 and 60, respectively, to support the preheating device 4,
When the heating device 5 and the plug pressing device 6 are activated, the paper container P
Holding it from both sides and attaching the plug will ensure accurate work.

Since the apparatus of this embodiment has the above configuration, the paper containers P conveyed by the auxiliary conveyor 1 are transferred onto the transfer conveyor 2 at predetermined intervals by the transfer device 3, and are supported by the support piece 10 under pressure. The spout C is attached while being transferred in the direction of arrow B.

That is, first, the paper container P is stopped directly below the preheating device 4, and in synchronization with this, the preheating section 20 descends and approaches, spraying hot air onto the shoulder S of the paper container to preheat it.

Further, the preheating section 20 emits hot air while separating from the shoulder section S, but when it returns to the predetermined position, the prismatic member 22 presses the limit switch 24 and stops blowing the hot air.

Next, the paper container P is transferred to the transfer conveyor 2 and transported directly below the paper container heating device 5.

Here, the paper container heating device 5 moves the heating section 29 close to the paper container shoulder S to heat and melt the thermoplastic resin coating on the surface thereof, similarly to the preheating device described above.

At this time, the contact member 63 contacts the shoulder portion S, and the heater 30
is always spaced a certain distance from the shoulder S and heats it at an optimal temperature.

Then, the paper container P is again transferred to the transfer conveyor 2 and placed directly below the plug pressing device 6.

On the other hand, the spout C is transferred to the spout transfer device 8 in the spout supply section 7.
It is extracted and gripped by the spout gripping claw 38 of the spout and is transferred directly above the spout heating device 9 .

Along with this transfer operation of the spout C, the heating section 48 of the spout heating device 9 rises via the cylinder device 47 and heats the back surface of the large diameter portion of the spout C made of synthetic resin and bonded.

The spout C is stopped here for a certain period of time to be heated, but is then transferred again and positioned directly below the spout holding claw 55 of the spout pressing device 6, that is, directly above the shoulder S of the paper container.

Next, the plug holding claw 55 grips the plug C via the expansion/contraction cylinder device 54, and then the plug transfer device 8
releases its spout gripping claw 38 and returns to the spout supply section 7 side.

Then, the spout pressing device 6 lowers the spout holding claw 55 using the pressing cylinder device 50 to press the spout C against the paper container shoulder S, releases the holding claw 55, and returns to the upward position.

The paper container P with the spout C attached as described above is transferred to the transfer conveyor 2 and proceeds to the next processing step.

Of course, it is also possible to form the abutting member 63 into a cylindrical shape and have a structure in which the abutting surface surrounds the annular portion 30a of the heater.

As described above, according to the present invention, it is possible to always heat the position of the paper container where the spout is to be attached at the optimal temperature for adhering the spout.

[Brief explanation of drawings]

FIG. 1 is a plan view of the entire spout attachment device using the paper container heating device according to the present invention, FIG. 2 is a front view of FIG. 1, and FIG.
4 is a side view of the preheating device, FIG. 5 is a side view of the paper container heating device, and FIG. 6 is a heating section of the paper container heating device. FIG. 7 is a front view with a part of the heating section in section, FIG. 8 is a side view of FIG. 7, and FIG. 9 shows the spout supply section, the spout heating device, and the spout. A plan view of the stopper transfer device, FIG. 10 is a side view of the stopper transfer device, FIG. 11 is a plan view of the stopper supply unit,
12 is a side view of FIG. 11, FIG. 13 is a front view of the plug heating device, FIG. 14 is a front view of the plug pressing device, and FIG. 15 is a side view of FIG. 14. 30: Heater, 63: Contact member, 63a: Contact surface, S:
Heated object (shoulder of paper container).

Claims (1)

[Scope of utility model registration request] It includes a contact member provided so as to be able to come into contact with and separate from the surface of the object to be heated, and a heater provided integrally on the side of the contact member, and the heater is arranged such that the tip of the contact member contacts the contact member. When the abutment surface abuts the surface of the object to be heated, the abutment surface is held in a predetermined position facing the surface where the plug is to be bonded, and the abutment member is a paper container heating device characterized in that a cooling water circulation passage is formed.