JPS6245875Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a spout heating device that constitutes a part of a spout attachment device that heats and adheres a paper container coated with a thermoplastic resin film and a synthetic resin spout to each other. Regarding.

Recently, paper containers have been used not only for milk and youth products, but also for sake products. Attaching a spout has been proposed, and spout attachment devices are being developed. Among the devices that make up this spout attachment device, the spout heating device in particular heats the adhesive part of the spout, and the quality of the heating of the adhesive part determines the attachment state of the spout to the paper container. Therefore, it is important to configure the bonding portion so that it can be heated to an optimal state for bonding.

In view of the above points, the present invention provides a spout heating device that can heat the adhesive part of the spout to the paper container to an optimal state for adhesion, and includes a ring-shaped heater that heats the adhesive part. and a spout guide member that protrudes from inside the ring of the heater, and the spout guide member engages the periphery of its end face with the periphery of the opening of the spout to adjust the relative position of the adhesive portion and the heater. It is characterized by regulation.

The present invention will be explained below with reference to illustrated embodiments. Fig. 1 is a plan view of the entire spout mounting device using the spout 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. 2 is a paper container P via a transfer device 3 at the end of the auxiliary conveyor 1.
This is a transfer conveyor that receives these paper containers P and transfers them for the purpose of attaching a cap. 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, are moved while being supported by support pieces 10 erected on the conveyor 2, and are placed above the transfer conveyor 2 in the transfer direction. A paper container preheating device 4, a paper container heating device 5, and a cap pressing device 6 (all of which are not shown in FIG. 1 for convenience) are installed along the paper container preheating device 4, a paper container heating device 5, and a cap pressing device 6 (all of which are not shown in FIG. 1 for convenience). be done.

In this embodiment, the spout attachment work is carried out on two paper containers at the same time, and the preheating device 4, the paper container heating device 5, the spout pressing device 6, the spout supply unit 7 described later, and the spout transfer unit are used. Two devices 8 and two plug heating devices 9 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 interval between these is the same as the interval between each paper container P. is set to be the same as.
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.

Thus, the transfer device 3 includes first transfer cylinder devices 1 arranged sequentially from the upstream side of the auxiliary conveyor 1.
2, a stop cylinder device 13 and a second transfer cylinder device 14 are provided. Each of these cylinder devices 12, 13, and 14 has a piston that can freely move forward and backward in the width direction of the auxiliary conveyor 1, and the pistons of the transfer cylinder devices 12, 14 carry paper containers P from the auxiliary conveyor 1 to the transfer conveyor 2. Push-out members 15 and 17 are attached to the paper containers P on the auxiliary conveyor 1, 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 to the push-out member 17 of the second transfer cylinder device 14 by the auxiliary conveyor 1.
, and 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 the spout to the paper container P. FIG. 3 is a front view of the preheating device 4 and the paper container heating device 5, and FIGS. 4 and 5 are the preheating device 4 and the heating device 5, respectively. Figure 5 shows a side view of the device 5; 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, and includes a cylinder device 19 fixed to a base plate 18 supported by the mounting frame 11, and this cylinder device. Preheating section 20 supported by 19 so as to be movable forward and backward.
It has Reference numeral 21 denotes a guide member having a U-shaped cross section attached to the base plate 18 in order to guide the forward and backward movements of the preheating section 20, and slidably supports the prismatic member 22 that connects the piston rod of the cylinder device 19 and the preheating section 20. are doing. A groove 23 that can be engaged with an operating section 24a of a limit switch 24, which will be described later, is carved in the rectangular column member 22 along its forward and backward direction, and the upper end of this groove 23 is deepened to guide the operating section 24a. A slope 23a is formed. 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 cause the air to flow through the air outlet 25. As warm air from the container shoulder S
It is now being sprayed on the air. That is, the preheating section 20 includes an electric heater and a blower fan therein, and power to these is turned on by the substrate 18.
It is controlled by the limit switch 24 provided above, and when the limit switch operation part 24a and the groove part 23 of the prismatic member 22 are in a non-interfering state as shown in FIG. 3, warm air is released from the blower outlet 25. It's becoming like that. Note that the air outlet 25 can come so close that it almost touches the shoulder S of the paper container, so if the size or shape of the paper container P changes, for example, the prismatic member 22 can be replaced with a predetermined one. All you have to do is convert and adjust their relative positions. Furthermore, since the board 18 is attached via bolts 28 to circular arc-shaped elongated holes 27 drilled in the mounting frame 11, by changing the fastening position of the bolts 28, the inclination angle of the entire preheating device 4 can be adjusted. It is possible to change and adjust the facing state of the outlet 25 and the container shoulder S.

The paper container heating device 5 has basically the same configuration as the preheating device 4, but the configuration of the heating section 29 corresponding to the preheating section 20 is different. That is, the heating unit 29 has an electric heater 30 at a portion facing the shoulder S of the paper container, and heats the electric heater 30 to bring it close to the shoulder S, and heats the thermoplastic resin at the position where the spout is to be attached. It is designed to melt the coating. As for the other configurations, like the preheating device 4 described above, a base plate 31 supported by the mounting frame 11, a cylinder device 32 fixed to this base plate 31, and a guide member 3
3, a limit switch 34, and a prismatic member 35 that connects the cylinder device 32 and the heating section 29. This prismatic member 35 is equipped with a limit switch 3, similar to the prismatic member 22 of the preheating device 4.
A groove 35a that can be engaged with the operating section 34a of the fourth heating section 34a is carved, and when the heating section 29 is lowered and the prismatic member 34 does not interfere with the operating section 32a, the heating section 29 is engaged with the operating section 34a. It is designed to carry electricity.

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. 6 and 7, 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, and receives the spout from the spout supply section 7. First, put C into the plug heating device 9.
The container is stopped directly above the paper container P, 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, 39 that mesh with each other are attached to these fulcrums, respectively.
Further, the tip of a piston 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 or backward, the plug gripping claw 38 expands and contracts. In addition, the plug gripping claw 3
8 is set with its tip facing obliquely upward, and its inclination angle is approximately parallel to the shoulder S of the paper container.

As shown in FIGS. 8 and 9, 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. , Adhesive large diameter part D of the spout C
It includes a guide plate 43 that covers both sides, and a discharge regulation plate 44 that is provided at the tip of the guide plate 43 and regulates 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 which 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 pawl 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 D 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 This plug heating device 9 is
As shown in FIG. 10, a cylinder device 47 is attached to a support frame 46, and a heating section 48 is connected to a piston rod of this cylinder device 47. Of course, the end face of this heating part 48 is set at an angle so as to directly face the adhesive large diameter part D of the spout C.

Therefore, FIGS. 11 and 12 show the heating section 4.
8 is an enlarged view of FIG. Reference numeral 61 denotes a support member having a flange portion 61a for attachment to the piston rod of the cylinder device 47. On both sides of this support member 61, insulating members 62, 62 having a length of about half of the total length of this support member are fixed. Conductive members 63, 63, which are longer than the insulating member 62, are provided on both sides. Reference numeral 64 denotes a heater, both ends of which are attached inside the conductive members 63, 63, respectively, and a central portion 64a of the heater is formed into a ring shape. The shape of the annular central portion 64a is set in accordance with the shape of the adhesive portion of the spout C, which will be described in detail later. Therefore, a cylindrical plug guide member 35 whose end surface periphery 65a is chamfered is integrally extended to the support member 61, and this guide member 65 is connected to the annular central portion 61.
It is made to protrude from the inside of the ring 4a. In addition, 66,6
Reference numerals 7, 68, and 69 are cooling holes through which cooling water flows to cool the guide member 65, the conductive member 63, and the like. Further, 70 is a lead wire for supplying power to the heater 64.

To explain the positional relationship between the heater 64 and the spout C when the large-diameter portion D of the spout is heated by the heating unit 48 having the above configuration, the spout C bonded to the paper container P by the device of this embodiment is As shown in FIG. 13, a plurality of concentric adhesive pleats F are provided upright on a large adhesive diameter portion D that is continuous with the end of the cylindrical portion E. . The outer diameter of the plug guide member 65 of the heating section 48 is set to be slightly larger than the inner diameter of the cylindrical portion E, and the end surface periphery 65a of the guide member 35 engages with the peripheral corner of the cylindrical portion E. It is. During this engagement, the annular central portion 64a of the heater 64
As shown in FIG. 4, it is arranged to directly face the tips of the adhesive folds F at a predetermined distance, and as a result, the entirety of these folds F can be heated in a good condition.

Spout C heated by the spout heating device 9
is further transferred by the plug transfer device 8,
It is delivered to the plug pressing device 6. As shown in FIGS. 15 and 16, 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 has a pressing cylinder device 5.
0, a guide member 52 that guides the reciprocating movement of a prismatic member 51 connected to the piston thereof, and a limit switch 53 that is interlocked with this prismatic member 51 are 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, which mesh with each other, in the same way as the plug holding claws 38, respectively.
56 is attached, and therefore, by driving the expansion/contraction cylinder device 54, the plug holding claw 55 expands and contracts to grasp 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 prism member 51, thereby driving the expansion/contraction cylinder device 54 and releasing the plug holding claw 55.

In addition, 57 is a pair of paper container support members, which are swingably supported on a support stand 58 via pins 59.
Driven by cylinder devices 60 and 60, respectively, when the preheating device 4, heating device 5, and plug pressing device 6 are activated, the paper container P is held between both sides,
This makes the plug installation work accurate.

Since the spout attaching device having the spout heating device 9 according to this embodiment has the above configuration, the paper containers P transported by the auxiliary conveyor 1 are placed on the transfer conveyor 2 at predetermined intervals by the transfer device 3. The spout C is attached while being transferred in the direction of arrow B while being pressed and supported by the support piece 10. That is, first, the paper container P stops directly below the preheating device 4, and in synchronization with this, the preheating section 20 approaches the paper container downward and preheats it by blowing warm air onto the shoulder S of the paper container. 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. 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 extracted and gripped by the spout gripping claw 38 of the spout transfer device 8 in the spout supply section 7 and transferred directly above the spout heating device 9 . Along with this transfer operation of the plug C, the heating part 48 of the plug heating device 9 rises via the cylinder device 47, and the guide member 65a
By engaging with the cylindrical portion E of the spout C, the heater 64 is spaced a certain distance from the fold F of the large diameter bonded portion D to heat it. 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 spout holding claw 55 grips the spout C via the expansion/contraction cylinder device 54, and then the spout transfer device 8 releases the spout gripping claw 38 and returns to the spout supply section 7 side. do. And the plug pressing device 6 is
The press cylinder device 50 lowers the spout holding claw 55 to press the spout C against the shoulder S of the paper container, and the holding claw 55 is released to return upward. 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.

The shape of the plug guide member 65 of the plug heating device 9 may be any shape as long as it engages with the cylindrical portion E of the plug, and instead of chamfering the end surface periphery 65a, It is also possible to form a stepped portion so as to be in close contact with the peripheral edge corner of the cylindrical portion E. moreover,
It goes without saying that the annular heater 64a is not limited to an annular one, but may be any one that matches the shape of the heated portion of the end face of the spout. As described above, according to the present invention, the heater can directly face the adhesive part of the spout at a certain distance, and therefore it is possible to heat this adhesive part uniformly and well. Effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the entire spout mounting device using the spout heating device according to the present invention, and FIG.
3 is a front view of the preheating device and the paper container heating device, FIGS. 4 and 5 are side views of the preheating device and the paper container heating device, respectively, and FIG. 6 is the spout supply section, A plan view of the spout heating device and the spout transfer device, FIG. 7 is a side view of the spout transfer device, FIG. 8 is a plan view of the spout supply section, FIG. 9 is a side view of FIG. 8,
FIG. 10 is a front view showing an embodiment of the plug heating device according to the present invention, FIG. 11 is a front view showing a part of the heating part of the plug heating device in cross section, and FIG. 12 is the same as that shown in FIG. 11. A side view, FIG. 13 is an enlarged perspective view of the plug, FIG. 14 is a sectional view of the main part showing the positional relationship between the plug and the heater during heating, and FIG. 15 is a front view of the plug pressing device. 16 is a side view of FIG. 15. 64a: ring-shaped heater, 65: plug guide member,
C: Spout, E: Cylindrical portion, F: Heated portion (adhesive folds).

Claims (1)

[Scope of utility model registration request] A spout having a cylindrical portion includes a ring-shaped heater that heats a heated portion formed on the end surface of the cylindrical portion, and a spout guide member that protrudes from the inside of the ring of the heater, and the spout guide member has a cylindrical portion. A spout heating device characterized in that a peripheral edge is engaged with a peripheral edge of an opening of the spout to regulate the relative position of the heated portion and the heater.