JPH0536814Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a heating device for a shrink label, which is applied to heat a shrink label wrapped around the outer periphery of a bottle or the like so that it shrinks and adheres tightly.

(Prior Art) Conventionally, as a heating device for this type of shrink label, there is one disclosed in, for example, Japanese Utility Model Application Publication No. 61-62806.

As shown in FIG. 9, this conventional device rotates (rotates) a mounting table 40 on which a label-wrapped object 3 such as a bottle with a shrink label 2 wrapped around its outer periphery is mounted.
Further, a substantially flat hot air generating heater 41 is provided on the side of the transport route for the label wrapping material 3 so as to be freely movable around the revolution.

According to this device, since the label wrapping 3 rotates on its own axis when it passes in front of the heater 41, the entire circumference of the shrink label 2 can be heated substantially uniformly.

(Problems to be Solved by the Invention) However, with the conventional means of simply rotating the label wrapping material 3 and passing it in front of the substantially flat heater 41, the following problems have occurred. .

That is, at the initial stage when the label wrapping material 3 is transferred to the front of the heater 41 as shown in FIG. A situation occurs where the product shrinks quickly. Such local heating of the A section can be alleviated to some extent by increasing the rotation speed of the label wrapping material 3, but it cannot be eliminated at all at the practical rotation speed of the label wrapping material 3.

Therefore, in the past, as shown in FIG. 10, the label position in section A, which is heat-shrinked fastest, shrinks locally, or the length of the label in the vertical direction is shortened due to shrinkage, a phenomenon known as " This resulted in problems such as "shrinkage" and the appearance of the product was impaired. In particular, such a problem is that when letters or designs are pre-printed on the Shrink label 2, the printed letters, etc. are unduly distorted, making it even more difficult to provide products with good appearance. .

The present invention was devised in view of the conventional problems as described above, and its purpose is to prevent the generation of localized undue heat shrinkage parts when shrinking the Shrink label, and to prevent the entire Shrink label from being heated. The point is to heat and shrink it to an appropriate and beautiful state.

(Means for Solving the Problems) The present invention devises the configuration of the heating device and the means for approaching the label wrapping to the heating device so that the entire circumference of the shrink label can be heated simultaneously, thereby achieving the above-mentioned results. It was designed to solve the problems of the conventional system.

That is, the present invention provides a shrink label heating device including a transfer device 4 for transferring the label wrap 3 in an upright state, in which the label wrap 3 transferred by the transfer device 4 is heated. A cylindrical heating device 24 having a downwardly opening hole 25 with a heating function is disposed above the transfer path, and the heating device 24 and the transfer device 4 are connected to each other. At least one of the transfer positions of the label wrapping material 3 is such that the label wrapping material 3 is in the hole 25 of the heating device 24.
The label wrapping material 3 is provided so as to be movable up and down in order to insert and remove the label wrapping material 3 into the hole 25 when it is transferred below the hole 25.
This is a heating device for shrink labels.

Further, in the present invention, in the heating device for shrink labels having the above structure, the transfer device 4 is configured as a rotary transfer device in which a mounting table 6 on which the label wrapping material 3 is placed is provided so as to be freely movable around the revolution. is,
The heating device 24 is located above the mounting table 6 and is provided to revolve in conjunction with the mounting table 6, and at least one of the mounting table 6 and the heating device 24 is During operation, the label wrapping material 3 can be freely raised and lowered so as to be inserted into and removed from the hole 25 of the heating device 24, and the label wrapping material 3 is inserted into and removed from the hole 25 of the heating device 24.
This is a heating device for a shrink label, which is provided so as to horizontally move when it is raised or lowered in order to maintain the state inserted in the shrink label for a predetermined period of time.

Furthermore, the present invention is a heating device for shrink labels, which is provided with an overturn prevention means 26 for preventing the label roll 3 placed on the mounting table 6 from overturning.

(Function) In the shrink label heating device characterized by the above configuration, when the label wrapping 3 is transferred to the lower part of the hole 25 of the heating device 24 by the transfer device 4, the transfer device 4 The transfer position of the label wrapping material 3 and/or the heating device 24 are moved up and down, and the label wrapping material 3 is inserted into the hole 25 of the heating device 24. The shrink label 2 of the object 3 faces the inner circumferential surface of the hole 25 and is heated and shrunk.

At this time, since the entire circumference of the upper edge of the shrink label 2 enters the hole 25 of the heating device 24 at the same time, only a portion of the periphery of the shrink label 2 is heated locally. The entire circumference of the upper edge of the shrink label 2 starts to be heated and evenly shrinks at the same time without any occurrence of shrinkage.
Furthermore, the entire surface of the shrink label 2 of the label wrapping 3 that has entered the hole 25 is heated by the heating device 24.
Since the heating can be performed from the entire inner circumferential surface of the hole 25, the subsequent heat shrinkage of the shrink label 2 can be performed evenly over the entire surface.

Furthermore, the mounting table 6 of the transfer device 4 and the heating device 24
is transferred to the public, and the label wrapping 3 is transferred to the heating device 2.
4, when both are configured to move horizontally when inserted into the hole 25 of the label wrapper 3, the shrink label 2 of the label wrapper 3 can be heated simultaneously with the public transport of the label wrapper 3. In addition to efficiently transferring and heating the label wrapping material 3, the label wrapping material 3 can be efficiently transported and heated simultaneously.
This allows sufficient time for the shrink label 2 to be heated by being inserted into the hole 25 of the heating device 24.

Furthermore, when a means for preventing the label roll 3 on the mounting table 6 from falling over is provided, the operation of transferring the label roll 3 and the insertion/removal work into the hole 25 of the heating device 24 can be performed reliably. , and these operating speeds can be increased.

(Embodiment) Hereinafter, an embodiment of the present invention will be described, taking as an example a case where it is configured as a so-called rotary shrinker.

In Figure 1, 1 is a shrink label 2 on the outer peripheral side.
A conveyor is shown that conveys a bottle 3 (wrapped label) made of a wrapped label. 4 is the conveyor 1
This is a rotary transfer device installed on the side of the bottle, which is composed of a rotary table 5, a plurality of mounting tables 6, etc., which will be described later, and is used to place the bottles 3 supplied from the conveyor 1 via the star foil 7 in an upright position on the mounting table. 6 and transported over a predetermined section, and then transferred to the original conveyor 1 via another star foil 7a.
It can be freely discharged downstream.

In FIGS. 2 and 3, 5 is the electric motor 12a.
The rotary table is shown in which the driving force is transmitted to the gears 9 and 10 to drive and rotate the main shaft 22.
Reference numeral 6 denotes a mounting table provided above the rod 8 which is pivotally supported through the rotary table 5, and is provided at a plurality of positions on the upper surface side of the rotary table 5 at equal intervals.

Reference numeral 11 denotes a relatively long gear fixed to the lower part of the rod 8, which is driven by an electric motor 12 to gears 13 and 1.
It is provided in a meshing state with a gear 16 attached to a rotating lower plate 15 which is driven and rotated via a gear 16. The gear 16 and the rotating lower plate 15 rotate in the opposite direction to the rotating table 5, and therefore the rod 8 and the mounting table 6, which are equipped with the gear 11 that meshes with the gear 16, also perform automatic operation during their revolution. .

Reference numeral 17 denotes a cam follower attached to one end of a holder 18 that is separately fitted to the lower part of the rod 8, and a roller 20 that engages with a slit member 19 at the lower part of the rotary table 5 is provided at the other end of the holder 18. The rod 8 is prevented from rotating in conjunction with its rotation. Reference numeral 21 denotes a cam plate for guiding the cam follower 17 to raise and lower the rod 8 and the mounting table 6 at a predetermined timing, and is supported by a bracket 33 and provided along the entire circumference of the revolution movement position of the cam follower 17. ing.

Reference numeral 23 indicates a rotating upper plate provided to rotate at the same angular velocity as the mounting table 6 around the main shaft 22. 24
is the plurality of mounting tables 6 on the lower surface side of the rotating upper plate 23.
A plurality of heating devices are provided to be positioned above each of the heating devices 24, and the heating devices 24 include, for example, a ceramic base material 3 formed in a substantially cylindrical shape.
0, in which the nichrome wire 31 is embedded in a spiral shape, etc., can be applied as appropriate, but in any case, the inner peripheral surface is formed in a cylindrical shape capable of exerting a heating function, and the hole The inner diameter of the bottle 25 is larger than the outer diameter of the bottle 3.

Reference numeral 26 denotes an overturn prevention rod that is pivotally supported through the heating device 24 and is used to prevent the bottle 3 placed on the mounting table 6 from overturning. Similar to the rod 8 that supports the mounting table 6, the rod 26 is provided with a cam follower 28 regulated by a cam plate 27 at its upper part in order to perform a predetermined vertical movement during its revolution movement. 32 is the cam follower 2
8 shows a roller that engages with a slit member 29 on the upper part of the rotating upper plate 23 to prevent rotation of the rotating upper plate 23.

The present embodiment has the above configuration, and next, an example of its use and operation will be explained.

First, in FIG. 1, a bottle 3 wrapped with a shrink label 2 is fed from a conveyor 1 via a star foil 7 onto a mounting table 6 of a rotary transfer device 4, and the bottle 3 is left in an upright position. Transport it publicly. At this time, a heating device 24 is present above the bottle 3, and the heating device 24 is connected to the mounting table 6.
It revolves along the same trajectory and at the same speed as the mounting table 6.

Furthermore, the bottle 3 rotates and revolves around its own axis due to the engagement between the rotationally driven gear 16 and the gear 11 at the bottom of the rod 8, but when the bottle 3 starts to be transferred, the tipping prevention rod 26 above the bottle 3 is closed. Cam plate 2
7, the cam follower 28 is lowered, and its tip is inserted into the mouth of the bottle 3 as shown in FIG. This prevents the bottle 3 from falling over unreasonably and enables reliable transportation to public transport.
Incidentally, the tipping prevention rod 26 idles together with the bottle 3,
There is no problem with the rotation of the bottle 3.

Thereafter, the mounting table 6 is moved up and down under the control of the cam plate 21 and the cam follower 17 while being moved publicly, and the bottle 3 is inserted into and removed from the hole 25 of the heating device 24 above it, as shown in FIG. Incidentally, the fall prevention rod 26 is also raised in the same manner.

Therefore, when the shrink label 2 is raised, the entire circumference of the upper side of the shrink label 2 is in contact with the hole 25 of the heating device 24.
Since the shrink label 2 enters the interior at the same time, the entire circumference of the shrink label 2 starts to be heated evenly. Therefore, only a part of the outer circumferential direction of the shrink label 2 is not locally heated, so that so-called "shrinkage" does not occur, and there is no distortion in printing. In this case, the upper side of the Shrink Label 2 will be heat-shrinked before the bottom side, but this type of Shrink Label 2 will shrink evenly unless local heat shrinkage occurs in the outer circumferential direction. can be carried out, and the Schuring label will not shrink due to a timing lag in the heat shrinkage of the upper and lower parts.

Further, when the entire bottle 3 is inserted into the hole 25 of the heating device 24 after that, the inner circumferential surface (heating surface) of the heating device 24 faces the entire surface of the shrink label 2, and the bottle 3 is heated. The entire link label 2 can be heated evenly more preferably. Therefore, the entirety of the shrink label 2 is uniformly heat-shrinked, and no undue wrinkles or the like occur.

Furthermore, if the bottle 3 is maintained in the raised state inserted into the hole 25 of the heating device 24 for a predetermined period as shown in the range C in FIG. Can be secured. Further, after that, the placing table 6 is lowered to separate the anti-overturning rod 26 from the bottle 3, and then the bottle is discharged to the downstream side of the conveyor 1 via the star foil 7a. Therefore, the above heating work is performed on bottle 3.
Since the operation is performed while the heating device 24 and the heating device 24 each revolve, the working time from supplying bottles to the rotary transfer device 4 to discharging them can be extremely shortened.

In the above embodiment, since the label wrapping material 3 (bottle) is rotated, the entire shrink label 2 can be heated more evenly by the heating device 24, and the finished state of the label shrink can be made more beautiful. is obtained. However, in the present invention, it is not necessary to rotate the label wrapping 3. By using the heating device 24 having a heating function on the inner peripheral surface, excellent uniform heating can be performed over the entire shrink label 2 without rotating the label wrapping 3.

Further, the specific configuration of the heating device 24 according to the present invention is not limited to the above embodiments. In the case where the fall prevention rod 26 is not provided, the upper side of the hole 25 may be closed as shown in FIG. The present invention also includes such a form as a cylindrical form.

Further, the heating device 24 may have a rectangular tube shape other than a cylindrical shape, or may be formed into a tube shape by combining a plurality of heater plates. Moreover, the specific structure is not limited to the one in which the nichrome wire is embedded in ceramics as in the above embodiment, but also the one in which an electric heater is attached to the inner circumferential surface of the cylindrical body, or the one in which the inner circumferential surface of the cylindrical body is A device that blows or discharges hot air or steam may also be used. In short, it is sufficient that the heating device 24 is configured as a cylindrical heating device 24 having a downwardly opening hole 25 with a heating function formed in the inner circumferential surface.

Further, in the above embodiment, the transfer device 4 is configured as a rotary transfer device, but the present invention may also apply a linear transfer device such as a belt conveyor or a pallet conveyor. In short, the transfer device 4 according to the present invention only needs to be capable of transferring the label wrapping material 3 in an upright state.
There is no question as to its specific type or composition.

Further, in the above embodiment, the mounting table 6 of the transfer device 4 is raised and lowered without raising and lowering the heating device 24, but the present invention is not limited to this. for example,
In addition to raising and lowering the heating device 24 side without raising and lowering the mounting table 6 as shown in FIG. 6A, it is also possible to raise and lower both the mounting table 6 and the heating device 24 as shown in FIG. 6B. Further, as the elevating means for the heating device 24, a mechanism similar to the cam mechanism for elevating and lowering the mounting table 6 in the above embodiment can be applied, but the present invention does not care about the specific elevating means. A cam mechanism other than the above, a mechanism using a reciprocating cylinder, etc. can be adopted as appropriate.

In short, at least one of the heating device 24 and the transfer position of the label wrapping material 3 of the transfer device 4 moves the label wrapping material 3 transferred below the heating device 24 into the hole of the heating device 24. It suffices as long as it can be moved up and down so that it can be inserted into and removed from the inside of 25. This lifting/lowering operation is the seventh
Of course, it is also possible to carry out the transport of the label wrapping 3 in a stopped state as shown in the figure. Note that when a belt conveyor or the like is used as the transfer device 4, the label wrapping material 3 cannot be easily raised and lowered, so in this case, the heating device 24 side may be raised and lowered.

Further, as means for preventing the label roll 3 from falling on the mounting table 6 according to the present invention, in addition to the falling prevention rod 26 of the above embodiment, for example, the mounting table 6 as shown in FIG.
It is also possible to use a hole 26a for vacuum suction, or a clamp piece 26b that can be opened and closed for clamping the lower part of the label wrapping 3 as shown in FIG.

In addition, the specific configuration of each part of the device according to the present invention can be freely modified within the scope of the present invention, and the label wrapping object to which the present invention is applied is by no means limited to bottles. For example, it goes without saying that the present invention can be applied to articles such as cans with a shrink label wrapped around the outer periphery, and the type of the article does not matter at all.

(Effect of the invention) As described above, the present invention provides a cylindrical heating device above the transfer path of the transfer device in which the label wrapping material is transferred in an upright state, and the heating device and the label wrapping material are connected together. By providing at least one side of the heating device so that it can be raised and lowered, the label wrapping material can be inserted into the hole of the heating device from the lower side and the Shrink label can be heated and shrunk. When heating the Shrink label, the entire circumference of the upper edge of the Shrink label is inserted into the hole of the heating device at the same time, and the entire circumference of the part concerned starts to be heated evenly, unlike the conventional method. The problem of local shrinkage caused by uneven heating of a part of the outer periphery of the shrink label has been solved.

As a result, according to the present invention, it is possible to prevent so-called shrinkage caused by local heating at the start of heating of the Shrink label, and even if the Shrink label is printed, the printing will not be distorted in any way. This has resulted in a special effect in that the product can be finished in a beautiful state with a good external appearance, and the product value of the label wrapping can be improved.

Moreover, the present invention not only enables uniform heating of the shrink label at the initial stage of heating, but also allows the inner peripheral surface of the heating device to face the entire shrink label afterwards to evenly heat the entire shrink label. This has the effect of making the overall finished state even better.

In addition, the heating method in which the label wrapping material is inserted into the hole of the heating device improves the heating efficiency for shrink labels, and the heating device is also less likely to release heat to the outside compared to conventional flat heaters. Because of its shape, it has the practical benefit of reducing costs related to heat consumption.

Furthermore, the present invention configures the transfer device as a rotary transfer device, so that the heating device is moved in conjunction with the mounting table, and when the label roll is inserted into the hole of the heating device, both of them are horizontal. When configured to be moved, the Shrink label of the wrapped label can be heated simultaneously with public transport of the wrapped label while ensuring sufficient heating time for the Shrink label.
An advantage is obtained that a series of operations of transporting and heating the label wrapping can be performed extremely efficiently and quickly.

Furthermore, by providing a means for preventing the label rolls from falling, the label rolls can be transported more reliably, providing the advantage of further increasing the reliability and speed of the work.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the shrink label heating device according to the present invention, FIG. 1 is a plan view showing the whole, FIG. 2 is a side view, and FIG. 3 is the same as that shown in FIG. 1. XX cross-sectional view. FIG. 4 is an explanatory diagram showing the heating work process. FIG. 5 is a sectional view showing another embodiment of the heating device. FIGS. 6A and 6B and FIG. 7 are explanatory diagrams showing other embodiments of the lifting and lowering operation state. FIGS. 8A and 8B are explanatory diagrams showing other embodiments of the fall prevention means according to the present invention.
9 and 10 show a conventional example, FIG. 9A is a perspective view of the device, FIG. 9B is a plan view of the main part, and FIG.
Figure 0 is a front view of the label wrapping after heating. 2... Shrink label, 3... Label wrapping material, 4... Transfer device, 6... Placement table, 24... Heating device, 26... Fall prevention means.

Claims (1)

[Claims for Utility Model Registration] 1. A heating device for Shrink labels, which is equipped with a transfer device 4 for transporting a label wrapping 3, which is made by wrapping Shrink labels 2 around the outer circumferential side surface, in an upright state. Above the transfer path of the label roll 3 transferred by the transfer device 4, there is a hole 25 with a downward opening and a heating function on the inner peripheral surface.
A cylindrical heating device 24 is disposed, and the heating device 24 and the transfer device 4
When the label wrapping 3 is transferred below the hole 25 of the heating device 24, the label wrapping 3 is placed in the hole 25 of the heating device 24. A heating device for shrink labels, characterized in that it is provided so as to be movable up and down so as to be inserted and removed. 2. In the heating device for shrink labels according to claim 1 of the utility model registration claim, the transfer device 4 is a rotary transfer device in which a mounting table 6 on which the label wrapping material 3 is placed is provided so as to be freely movable around the revolution. The heating device 24 is located above the mounting table 6 and is provided to revolve in conjunction with the mounting table 6, and at least one of the mounting table 6 and the heating device 24 The label wrapping material 3 is heated by the heating device 2 during its revolution movement.
It is provided so that it can be freely raised and lowered so as to be inserted into and removed from the hole 25 of the label wrapping material 3, and to horizontally move when the label wrapping material 3 is raised or lowered in order to maintain the state in which it is inserted into the hole 25 for a predetermined period of time. A heating device for syringe labels, which is characterized by: 3 In the heating device for shrink labels according to claim 2 of the utility model registration claim, an overturn prevention means 26 is provided to prevent the label roll 3 placed on the mounting table 6 from overturning. A heating device for Shrink labels, which is characterized by: