JPH0667309U - Heat shrink wrapping machine - Google Patents

Abstract

(57) [Abstract] [Purpose] The height position of the air outlet can be changed by the shape of both the air outlet and the air outlet and the relative change of the overlapping position with each other. [Structure] On both sides of a wall portion 6 of a heating tunnel 2 provided with a conveyor belt 3 on the lower side, hot air outlets 20 for heat-shrinking a heat-shrinkable film around an article are arranged side by side. An adjusting plate 22 provided with an outlet hole 21 that overlaps the outlet 20 is slidably provided on the wall portion. The outlet 20 and the outlet 21 are elongated holes of the same shape. Inclination is made at the same angle in opposite directions so that both of them cross-polymerize.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat shrink wrapping machine used for packaging articles using a heat shrink film.

[0002]

[Prior art]

 An ordinary heat shrink wrapping machine is equipped with a conveyor belt 3 below a heating tunnel 2 covered with a cover 1 as schematically shown in FIG. 3, and an object to be wrapped 5 wrapped with a heat shrink film 4 is a conveyor belt. While being placed on the sheet 3 and passing through the heating tunnel 2, the heat-shrinkable film 4 is heated and shrunk by hot air to wrap the article 5 to be packaged.

The hot air is blown into the tunnel from a heating chamber 7 provided between the cover 1 and the inner wall portion 6 forming the heating tunnel. This hot air is created by feeding the outside air to the heater 8 arranged in the upper part of the heating chamber 7 by the fan 9, and usually a plurality of upper and lower outlets 10 arranged in parallel on the walls 6 on both sides of the tunnel. From, it is blowing into the tunnel. Further, the amount of blowout is adjusted by providing a horizontally long adjusting plate 12 having a plurality of blowout holes 11 having the same diameter as the blowout port 10 slidably on the inner wall surface, and sliding the adjusting plate 12 laterally. And the overlapping of the outlet 10 and the outlet 11 is adjusted.

[0004]

[Problems to be solved by the device]

 Such a conventional structure is preferable in that the blowout amount can be adjusted, but since the height position of the blowout port is always constant, depending on the packaged object passing through the tunnel, the surrounding area of the article may be reduced. There was an inconvenience that the hot air could not be blown to the heat shrink film efficiently.

The present invention was conceived in order to solve such a conventional problem, and its purpose is to determine the shapes of both the air outlet and the air outlet and the relative change in the mutual overlapping position. Therefore, it is to provide a new heat-shrinkable packaging machine in which the height position of the air outlet can be changed.

[0006]

[Means for Solving the Problems]

 The feature of the present invention for the above purpose is that a plurality of hot air outlets for heat-shrinking the heat-shrinking film around the article on the conveyor belt are arranged side by side on both sides of the wall of the heating tunnel equipped with the conveyor belt on the lower side. However, in a heat-shrink wrapping machine in which a wall is slidably provided with a horizontally-long adjustment plate having the same number of blow-out holes as the blow-out port, the blow-out port on the wall side and the blow-out hole on the adjustment plate side are Are formed in the same shape, and they are formed so as to cross-polymerize at the same angle in opposite directions.

[0007]

[Work]

 In the above configuration, since both the outlet and the outlet are oblong and are inclined at the same angle in the opposite direction, the overlapping of the both due to movement of the outlet due to sliding of the adjustment plate It moves downward, and thereby the height position of the air outlet opening at the overlapping position is vertically displaced.

Further, when the moving dimension of the adjusting plate is remarkably increased, the outlet hole is removed from the inclined position of the outlet, and the outlet is closed by the plate surface of the adjusting plate.

[0009]

【Example】

 1 and 2 show an embodiment of the present invention. Since the other parts except the both walls of the heating tunnel are the same as those of the conventional machine shown in FIG. 1, the structure thereof is omitted. .

Inside the wall 6 of the heating tunnel 2, the upper and lower sides are respectively inserted into three upper and lower two outlets 20 provided at required intervals on both sides of the wall 6 of the heating tunnel 2, and a lateral guide member 23. The three oblong adjusting plates 22 provided on the surface so as to be slidable laterally are provided with three blowing holes 21 which are provided at the same intervals as the air outlet 20 and are formed by the same oblong holes.

Further, both of them are formed so as to be cross-overlapping with each other at the same angle in mutually opposite directions, and the height position of the air outlet 20 opened by superposition is vertically displaced depending on the crossing position.

As shown in the lower part of FIG. 1, the opening position of the blowout port 20 is based on the position where both are cross-polymerized at the center, and the moving dimension of the adjusting plate 22 is significantly larger than that position. Then, as shown in the upper stage, the outlet hole 21 is disengaged from the inclined position of the outlet 20, and the outlet 20 is closed by the plate surface of the adjusting plate 22.

However, when the adjusting plate 22 is moved within the range where both do not come off, as shown in FIG. 2, the crossing position moves up and down, and a height difference occurs at the opening position of the blowout port 20. Therefore, if the object to be packaged is tall and it is necessary to blow hot air from a position higher than the reference position, place the adjustment plate 22 on the right side of the figure as shown in the upper part of FIG. The position of the air outlet 20 can be displaced to a high position simply by moving

On the other hand, when the packaged article is short and it is necessary to blow hot air from a position lower than the reference position, as shown in the lower part of FIG. The position of the air outlet 20 can be displaced to a low position only by moving it to the side.

[0015]

[Effect of device]

 As described above, this invention uses the same shape for the outlet on the wall side and the outlet on the adjusting plate side, and inclines at the same angle in opposite directions so that both of them cross-overlap. Since it is formed, it is possible to change the height position of the air outlet opening at the overlapping position with the air outlet hole up and down by sliding the adjustment plate, which allows the hot air to be blown out at a higher height depending on the height of the packaged article. The heating efficiency is better than before and the heat energy for heat shrink packaging can be used effectively.

Further, since only the shape and the angle of both the side air outlet and the air outlet of the adjusting plate are changed, the other configurations are the same as the conventional ones, and therefore the heat shrink wrapping machine up to now can be used immediately. It has features such as application.

[Brief description of drawings]

FIG. 1 is a main part surface view of a heating tunnel wall portion of a heat shrink packaging machine according to the present invention.

FIG. 2 is an explanatory view showing changes in the height position of the air outlet due to the movement of the adjusting plate.

FIG. 3 is a schematic vertical sectional front view of a general heat shrink packaging machine.

FIG. 4 is a surface view of the heating tunnel wall portion.

[Explanation of symbols]

 1 Cover 2 Heating Tunnel 3 Belt Conveyor 4 Heat Shrinkable Film 5 Packaging Article 6 Wall of Heating Tunnel 20 Elongated Hole Outlet 21 Elongated Hole Outlet 22 Adjustment Plate 23 Guide Member

Claims (1)

[Scope of utility model registration request] 1. A plurality of hot air outlets for heat-shrinking a heat-shrinkable film around an article on a conveyor belt are arranged side by side on both sides of a wall of a heating tunnel provided with a conveyor belt on the lower side, and the air outlets are provided. In a heat-shrink wrapping machine in which a horizontally long adjustment plate with the same number of blowout holes is slidably provided on the wall, the blowout port on the wall side and the blowout hole on the adjustment plate side have the same shape as a long hole. In addition, the heat shrink wrapping machine is characterized in that both are inclined and formed in the opposite directions at the same angle so that both of them cross-polymerize.