JP2504272B2 - Mouth welding device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a stopper welding device for fixing a stopper to a container.

[Prior Art] It is well known that a container for storing a liquid for drinking such as liquor and juice is provided with a spout. In that case, there is a fixing method in which the stopper is attached to the container in advance and the attached stopper is heated, that is, fixed to the container by heating the attached stopper by a heating means such as an ultrasonic welding device.

When this fixing method is used, the portion of the container to which the mouth plug is attached is received from the inside of the container by a container receiving member called an anvil, and the horn of the ultrasonic welding device is externally attached. It is common to press the mouthpiece to heat the mouthpiece.

[Problems to be Solved by the Invention] However, when the spigot is welded by the method as described above, the temperature of the anvil rises while the welding process is repeatedly performed, and the temperature change of the anvil is caused. Along with this, the welding conditions for the mouth plugs changed, and as a result, poor welding of the mouth plugs might occur. For example, when the container adheres to the high temperature anvil and the welding process is completed and then the container is pulled out from the anvil, the container may not be pulled out well or the container may be damaged.

In addition, if the temperature of the place where the welding process is performed is extremely low, the temperature of the anvil becomes too low, and the output of the ultrasonic welding device adjusted to a certain value alone will bring the plug to the desired temperature. The temperature could not be raised, and as a result, the sticking of the spout might be incomplete.

The present invention has been made in view of the above problems in the conventional plug welding device, and by always maintaining the temperature of the container receiving member such as an anvil within a certain range, The purpose is to ensure that welding is always performed.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the spout welding device according to the present invention is a temperature control means for allowing a temperature control fluid to flow inside the container receiving member (anvil 5) ( Anvil cavity 20, fluid supply pipe 21, fluid exhaust pipe 22, etc.),
In particular, it is characterized in that a cavity is provided inside the container receiving member, and a fluid for temperature control is allowed to flow through the cavity at least during the spout welding work.

In this case, when it is considered that the temperature of the container receiving member exceeds the allowable limit and becomes high, cold water can be used as the temperature adjusting fluid. On the other hand, when the temperature of the container receiving member is extremely low, warm water can be used as the temperature adjusting fluid.

The temperature adjusting fluid is not limited to the liquid such as the cold water or the hot water, but may be air or other gas.

[Operation] By flowing the temperature control fluid into the container receiving member, the temperature of the container receiving member is always kept within a certain range. For example, even if the heating process by the spout heating means is repeated, the temperature of the container receiving member does not become abnormally high. Further, even when the ambient temperature is extremely low, the temperature of the container receiving member can be kept higher than that.

[Example] FIG. 2 shows a main part of an example of a container manufacturing apparatus using the plug welding device according to the present invention.

In the figure, a container, for example, a rectangular carton 3 is conveyed in a direction perpendicular to the plane of the drawing by a conveying device 2 having a claw 1. A container receiving member supported by a frame 4, for example, a square tubular anvil 5 made of stainless steel is fixedly disposed above the transport device 2. The anvil 5
An ultrasonic welding device 6 as a spout heating means is arranged on the right side of. The ultrasonic welding device 6 has a converter 8 fixed on the slide table 7, a booster 9 also fixed on the slide table 7, and a vibration horn 10 fixed on the left side of the booster 9. .
The slide table 7 is driven by a drive device (not shown) to reciprocate in the left-right direction in the figure.

A carton lifting device 11 is arranged below the transport device 2 and at a position facing the anvil 5. The carton lifting device 11 includes an air cylinder 12, and a push-up rod 13 and a push-down rod 14 attached to an actuator rod 12a of the air cylinder 12.

The carton 3 is carried by the carrying device 2 and carried to a position below the anvil 5. Before being carried to this position, the carton 3 is preliminarily shown in the carton 3 as indicated by an arrow in FIG. A stopper 16 is attached, that is, inserted from the inside to the outside in a hole 15 formed in the tip portion.

 The operation of the above device will be described below.

In FIG. 2, when the carton 3 carried by the carrying device 2 is carried to a position below the anvil 5, the movement of the carton 3 is stopped. After that, the air cylinder 12 operates and the push-up rod 13 moves upward, and the carton 3 is lifted upward. The lifted carton 3 has its upper end opening fitted into the anvil 5, as indicated by the chain line.

When the carton 3 fits into the anvil 5, the slide table 7 moves to the left in the figure, the tip (left end) of the vibrating horn 10 comes into contact with the right upper surface of the carton 3, and further pushes it against the anvil 5. At this time, the stopper portion 17 of the mouth stopper 16
(FIG. 3) enters into the recess 18 provided at the tip of the vibrating horn 10. In this state, ultrasonic vibration is applied to the stopper 16 to heat the stopper 16, and as a result, the stopper 16 is heated.
The base 19 of the is welded to the inner surface of the carton 3.

When the welding is completed, the slide table 7 moves to the right and the vibrating horn 10 comes off the carton 3. Then, the air cylinder 12 operates and the push rod 14 descends, whereby the carton 3 is disengaged from the anvil 5. After that, the carton 3 is carried by the carrying device 2 and sent to the next step, for example, a liquid filling step (not shown) for filling a liquid for drinking such as liquor.

If the above-described plug welding work is repeatedly performed, the ultrasonic vibration transmitted from the vibrating horn 10 may raise the temperature not only of the plug 16 but also of the anvil 5. When the temperature of the anvil 5 becomes higher than the allowable limit, the inner surface of the carton 3 will be welded to the anvil 5,
The push rod 14 may not properly remove the carton 3 from the anvil 5, or the carton 3 may be damaged.

In order to prevent such a temperature change of the anvil 5, in this embodiment, as shown in FIG. 1, temperature control means for adjusting the temperature of the anvil 5 is attached to the anvil 5. The temperature control means shown in FIG. 1 includes a hollow portion 20 formed inside the anvil 5, a fluid supply pipe 21 deeply inserted into the hollow portion 20, and a fluid discharge shallowly inserted into the hollow portion 20. It is composed of a pipe 22.

The fluid supply pipe 21 is connected to a fluid supply source (not shown) via a cock 23, and a temperature control fluid, for example, cold water is supplied from the fluid supply source to the anvil cavity 20 via the fluid supply pipe 21. . The fluid discharge pipe 22 is connected to a liquid recovery means (not shown) such as a drain tank, and sends cold water in the cavity 20 to the liquid recovery means.

In FIG. 2, while the plug welding work by the ultrasonic welding device 6 is repeatedly performed, the cold water sent from the fluid supply pipe 21 and sent out via the fluid discharge pipe 22 flows into the anvil cavity 20. To do. As a result, the heat generated in the anvil 5 is carried out by the cold water to the outside, and the anvil 5 is always kept in a constant temperature range. Therefore, it is possible to prevent the occurrence of a welding defect such that the anvil 5 becomes abnormally hot and the inner surface of the carton 3 is welded to the anvil 5 as described above.

On the other hand, when the device shown in FIG. 2 is placed in an extremely low temperature environment such as in winter, the temperature of the anvil 5 becomes too low and the ultrasonic welding device 6 heats the spigot.
A situation may occur in which the temperature of 16 does not rise to the target temperature. In this case, in FIG. 1, hot water as a temperature adjusting fluid is fed into the anvil cavity 20 via the fluid supply pipe 21. This prevents the anvil 5 from becoming colder than the allowable limit,
Poor welding such as incomplete welding is prevented.

Although the present invention has been described above with reference to one embodiment, the present invention is not limited to that embodiment.

For example, the configuration of the temperature adjusting means is not limited to that shown in FIG. 1 and may be any other configuration.

Further, the temperature adjusting fluid is not limited to a liquid such as cold water or hot water, but may be air or another gas.

[Effect of the Invention] According to the present invention, the temperature of the container receiving member can be always maintained within a certain range by the fluid flowing inside the container receiving member. Therefore, it becomes possible to always keep the temperature of the stopper heated by the stopper heating means within a certain range, and it is possible to prevent the sticking failure from occurring when the stopper is fixed. . In particular, since the cavity is provided inside the container receiving member, and the temperature adjusting fluid is made to flow in the cavity, the temperature of the portion of the container receiving member corresponding to the spout is efficiently It can be adjusted well.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an essential part of an embodiment of a stopper welding device according to the present invention, and FIG. 2 is a side view showing a part of a container manufacturing apparatus in which the stopper welding device is used. FIG. 3 is a perspective view showing an example of a container and a stopper. 3 ... Carton, 5 ... Anvil, 6 ... Ultrasonic welding device, 10 ... Vibrating horn, 16 ... Spigot, 20 ... Anvil cavity, 21 ... Fluid supply pipe, 22 ... Fluid discharge pipe ,
23 …… Cock

Claims (3)

(57) [Claims] 1. A container receiving member to be inserted into a container fitted with a spigot, and a spout heating means arranged so as to face the container receiving member. A cap welding device for fixing a cap to a container by heating the cap while pressing it against the container receiving member by the cap heating means. A spigot welding device, characterized in that a fluid for temperature control is allowed to flow through the cavity during the operation. 2. The plug welding device according to claim 1, wherein the temperature adjusting fluid is a cooling liquid for cooling the container receiving member. 3. The plug welding device according to claim 1, wherein the temperature adjusting fluid is a temperature raising liquid for raising the temperature of the container receiving member.