JP2631278B2 - Shrink tunnel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shrink tunnel operable in an energy-saving state.

[0002]

2. Description of the Related Art Heretofore, this type is as follows. Air is heated by an electric heater in a box with an insulated structure, and the film is shrunk by heat while transferring a container covered with a film using a conveyor while being stirred and uniformed from above by a fan. In some methods, the air is blown upward from below by a fan for stirring, or blown from the side. In addition, heat-resistant cloth is placed at the entrance and exit to prevent heat from flowing out.

[0003]

The above-mentioned prior art has the following problems. 1. It takes time to transfer heat to the shrink film and shrink it. 2. Since it takes a long time to shrink, the container and the contents other than the intended one are heated and the efficiency is low. 3. As time elapses, the air in the container is warmed, and the content powder (granular starch) is discharged from the gap between the lid and the expanded air, so that the powder is accumulated between the film and the lid, and the appearance is poor. 4. It is difficult to use a shrink tunnel for those that are easily deteriorated by heating.

[0004] The present application has been made in view of such problems of the prior art, and an object of the present invention is to provide one that can solve the above-mentioned problems. In other words, it is not enough to purchase a shrink tunnel in earnest because the amount of production is small enough to attach a shrink film to the bottle, apply heat to the film, and adhere to the container and ship it as a product. After that, when I baked it, it was very beautiful. Electric pots on the market are automatically controlled in the range of 93-85 ° C, and were optimal for shrink shrinkage. There was a request to shrink, it became impossible to use in hot water, and as a result of trial and error in various ways such as a hot air heater including a hair dryer that emits hot air immediately, the present invention was completed. is there.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention is as follows. That is,
The present invention comprises a transfer conveyor section 2, a heating furnace section 3, and an exhaust pipe section 4. The transfer conveyor section 2 is provided for left and right conveyors arranged in a pair of left and right directions in the front-rear direction. The heating furnace unit 3 includes belts 2B12 and 2B22, and the traveling speeds of the left and right conveyor belts are different from each other. The heating furnace unit 3 includes a case 3A having a heat insulation structure disposed to cover the upper surface of the conveyor 2B. The case comprises a far-infrared panel heater 3B attached to the left and right side surfaces of the case. The exhaust pipe section 4 includes a heat-resistant blower 4A provided in the heating furnace section 3 and a heat-resistant blower opened in the heating furnace section 3. , An air outlet 4C of a heat-resistant blower drawn into the heating furnace section 3, and a left air distribution tube group 4F arranged along the left side of the conveyor 2B connected to the air outlet 4C. And the right side of conveyor 2B Air distribution tube bank 4G of along disposed right
The left air distribution pipe group 4F is arranged in parallel with the air curtain air distribution pipe unit 4F1 which is closest to the outlet 3A31 in the heating furnace unit 3 and the air curtain air distribution pipe unit 4F1. The right air distribution pipe group 4G is composed of a suitable number of shrink air distribution pipes 4F2 arranged in a state, and the air curtain distribution air flow closest to the inlet 3A21 in the heating furnace section 3. A single pipe 4G1 and an appropriate number of single shrink air distribution pipes 4G2 disposed in parallel with the air curtain air distribution pipe alone. It is configured to act as an air curtain for the outlet or the inlet, and the left and right shrink air distribution pipes are at right angles to the shrink film attached to the bottle that is moving while rotating, and are blown instantly and strongly. A shrink tunnel that is configured to be contracted to.

In this case, the following can be performed. A. The transfer conveyor unit 2 includes a gantry 2A and a conveyor 2B disposed on the gantry in the front-rear direction. The conveyor 2B is a pair of left and right conveyor belts disposed on the gantry in a left-right pair. 2B12 and 2B22, and the traveling speeds of the left and right conveyor belts are configured to be different between the left and right.
And a far-infrared panel heater 3B attached to the left and right side surfaces of the case. The case 3A is provided so as to cover the upper surface of the portion excluding the start end portion 2B3 and the end portion 2B4. A front inverted U-shaped inlet 3A21 is opened at the lower center of the front wall so as to correspond to the conveyor 2B, and a front inverted U-shaped outlet 3A31 is opened at the lower center of the rear wall so as to correspond to the conveyor 2B. An opening 3A51 is opened at the center of the heating furnace 3 so as to correspond to the conveyor 2B, and the exhaust pipe section 4 has a heat-resistant blower 4A provided on the upper surface of the ceiling 3A1 of the heating furnace section 3 and an opening on the lower surface of the ceiling of the heating furnace section 3. Suction opening 4B of the heat-resistant blower and a discharge opening 4C of the heat-resistant blower which is drawn into the lower surface of the ceiling of the heating furnace 3 and opened.
And a left air distribution tube group 4F disposed along the left side of the conveyor 2B connected to the air outlet 4C, and a right air distribution tube group 4G disposed along the right side of the conveyor 2B. And
The left air distribution pipe group 4F is connected to the outlet 3A31 in the heating furnace section 3.
Air curtain air distribution pipe 4F1 closest to
And an appropriate number of shrink air distribution pipes 4F2 arranged in parallel with the air curtain air distribution pipes alone. The air curtain air distribution pipe unit 4G1 closest to the inlet 3A21 and an appropriate number of shrink air distribution pipe units 4G2 arranged in parallel with the air curtain air distribution pipe unit. The left air curtain air distribution pipe unit 4F1 includes a vertical cylinder 4F12 having a bottom 4F11, a vertical groove-shaped air distribution port 4F13 formed on a side wall of the vertical cylinder, and a case 3A provided in the air distribution port. Guide plate 4F1 toward the center
4, and the height of this guide plate is the outlet 3A3
1 and the air outlet 4F
13 is configured so that hot air from 13 flows out along the wall,
The right air curtain air distribution pipe unit 4G1 includes a vertical cylinder 4G12 having a bottom 4G11, a vertical groove-shaped air distribution port 4G13 formed on a side wall of the vertical cylinder, and a vertical direction of the case 3A. The guide plate 4G14 is continuously provided, and the height of the guide plate is configured to match the height of the inlet 3A21, and the hot air from the air distribution port 4G13 flows out along the wall, The left shrink air distribution pipe unit 4F2 includes a vertical cylinder 4F22 having a bottom 4F21, a vertical groove-shaped air distribution port 4F23 formed on a side wall of the vertical cylinder,
A guide plate 4 is provided in this air outlet toward the center of the case 3A.
F24 is connected continuously, and the right air duct for shrink 4G2
The vertical tube 4G22 having a bottom 4G21, a vertical groove-shaped air distribution port 4G23 formed on the side wall of the vertical cylinder, and a guide plate 4G24 connected to the air distribution port toward the center of the case 3A can be continuously provided. it can.

B. Magnets can be attached to the lower surfaces of the vertical tubes of the shrink air distribution pipe alone and the air curtain air distribution pipe alone. C. Guide plate 4 for single air distribution pipe for left and right shrink
The inner vertical sides 4F25 and 4G25 of F24 and 4G24 can be formed vertically, and the inner vertical sides 4F25 and 4G25 can be configured as oblique sides.

[0008]

[Action] The action will be described together with the effect.

[0009]

An embodiment will be described with reference to the drawings. 1
Is a shrink tunnel of the present invention, and a conveyor 2 for transfer.
And a heating furnace section 3 and an exhaust pipe section 4. The transfer conveyor unit 2 is composed of a gantry 2A and a conveyor 2B disposed on the gantry in the front-rear direction. The lower base 2A1 is a flat square, and the columns 2A2 are planted at four corners of the lower base. An upper frame 2A3 is provided at the upper end of the column, and the conveyor 2B has left and right conveyor frames 2B1, 2B2 laid in a pair on the gantry and inside the left and right conveyor frames. The left and right receiving rollers 2B11 and 2B21 rotatably mounted at predetermined intervals, the left and right conveyor belts 2B12 and 2B22 respectively wrapped around the left and right receiving rollers, and the left and right conveyor belts are connected. It is composed of left and right motors 2B13 and 2B23, and the traveling speeds of the left and right conveyor belts are different between left and right. Cormorant is configured. The left and right motors are controlled by inverters.

[0010] The heating furnace portion 3 is a starting end portion 2B of the conveyor 2B.
The case 3A includes a case 3A disposed so as to cover the upper surface of the portion excluding the terminal portion 3 and the terminal portion 2B4, and a far-infrared panel heater 3B attached to the case. Case 3
A is a flat rectangular ceiling 3A1, front and rear walls 3A2 and 3A3 vertically hanging around the ceiling, left and right walls 3A4 vertically hanging right and left of the ceiling, and a bottom plate 3 stretched between the left and right walls.
A5, a front inverted U-shaped entrance 3A21 opened at the lower center of the front wall so as to correspond to the conveyor 2B, and a front inverted U opened at the lower center of the rear wall so as to correspond to the conveyor 2B.
Conveyor 2 is located at the center of the outlet 3A31 and the bottom plate 3A5.
The far-infrared panel heater 3B is detachably attached to the opening formed in the left and right walls 3A4. In addition,
The ceiling 3A1, the front and rear walls 3A2, 3A3, and the left and right walls 3A4
Each has a double structure, and the inside is filled with a heat insulating material 3A6.

The exhaust pipe section 4 includes a heat-resistant blower 4A provided on the upper surface of the ceiling 3A1 of the heating furnace section 3, an intake port 4B of the heat-resistant blower opened on the lower surface of the ceiling of the heating furnace section 3, and a heating furnace. An air outlet 4C of a heat-resistant blower which is drawn into the lower surface of the ceiling of the section 3 and left and right iron horizontal pipes 4D and 4E connected to the air outlet 4C and arranged at the upper left and right inside the heating furnace; A left air distribution pipe group 4F branched from the horizontal pipe 4D and arranged along the left side of the conveyor 2B via the aluminum duct 4D1, and a conveyor 2B branched from the right iron horizontal pipe 4E via the aluminum duct 4E1. And a right air distribution pipe group 4G arranged along the right side of.

The left air distribution pipe group 4F includes one air curtain air distribution pipe 4F1, which is closest to the outlet 3A31 in the heating furnace section 3, and one air curtain air distribution pipe alone. And four shrink air distribution pipes 4F2 arranged in parallel. Right distribution pipe group 4G
Is a single air curtain air distribution pipe 4G1 closest to the inlet 3A21 of the heating furnace section 3, and 4 is disposed in parallel with the air curtain air distribution pipe alone.
And a single shrink air distribution pipe 4G2.

The air distribution pipe unit 4F1 for the left air curtain is:
A vertical cylinder 4F12 having a bottom 4F11, a vertical groove-shaped air distribution port 4F13 formed on a side wall of the vertical cylinder, and a guide plate 4F14 connected to the air distribution port toward the center of the case 3A. The height of the guide plate is set to match the height of the outlet 3A31, and the hot air from the air outlet 4F13 flows out along the wall. The right air curtain air distribution pipe unit 4G1 includes a vertical cylinder 4G12 having a bottom 4G11, a vertical groove-shaped air distribution port 4G13 formed on a side wall of the vertical cylinder, and a vertical direction of the case 3A. The guide plate 4G14 is continuously provided, and the height of the guide plate is configured to match the height of the inlet 3A21, and the hot air from the air distribution port 4G13 flows out along the wall. I have. The left air duct 4F2 for shrink is a vertical cylinder 4F22 having a bottom 4F21,
Vertical groove-shaped air distribution port 4F23 formed on the side wall of this vertical cylinder
A guide plate 4F24 is connected to the air distribution opening toward the center of the case 3A. M is a magnet attached to the lower surface of the vertical cylinder for positioning the distance between the air distribution port and the bottle.

The right shrink air distribution pipe 4G2 is composed of a vertical cylinder 4G22 having a bottom 4G21, a vertical groove-shaped air distribution port 4G23 formed on the side wall of the vertical cylinder, and a center of the case 3A. A guide plate 4G24 is continuously provided in the direction. M is a magnet attached to the lower surface of the vertical cylinder for positioning the distance between the air distribution port and the bottle.

As a result, the hot air from the left and right air curtain distribution pipes is configured to act as an air curtain for the outlet or the entrance, and the hot air from the left and right shrink distribution pipes rotates. It is configured so that it can be sprayed at right angles to the shrink film attached to the bottle that is moving. For this reason, the shrink film is shrunk cleanly and instantaneously in the same manner as when shrink film is placed in hot water and shrunk. In addition,
Guide plate 4F2 in the right and left shrink air distribution pipes alone
The inner vertical sides 4F25 and 4G25 of the 4,4G24 may be vertical. However, when the shape of the bottle is, for example, a triangular pyramid, the inner vertical side 4F2 is adjusted according to the inclination of the bottle.
5,4G25 is formed on the hypotenuse to minimize the distance to the bottle.

In the following, specific dimensions and the like of each of the above components will be described. 1. Heating furnace section A. The case 3A is made of a steel plate and has a cubic shape of 500 mm in length, width and height, the width of the inlet and the outlet is 100 mm, the height is 170 mm, and the width of the opening 3A51 is 100 mm.
mm. B. The far infrared panel heater 3B is 320 mm long and 40 wide.
The one having a width of 0 mm, a width of 40 mm, and 1.6 kW is used. The far-infrared panel heater 3B is controlled via a temperature sensor, and shrinks at a constant temperature by blowing hot air from a discharge port to a shrink film attached to the bottle. C. A 0.2 kW motor controlled by an inverter is connected to the left and right conveyor belts 2B12 and 2B22 in the transfer conveyor section 2, and a bottle riding on the belt is used by utilizing a difference in speed of the belts. It is configured to move from the inlet to the outlet while rotating. As the difference between the speeds of the left and right conveyor belts increases, the rotation of the bottle is accelerated, and the necessary time from the entrance to the exit and the optimal adjustment for the shrinkage of the shrink film can be performed.

D. The transfer conveyor unit 2 is fixed on a table of a fixed height in relation to continuous operation with the preceding and following devices, and the position of the heating furnace unit installed on the transfer conveyor unit is the lowest height. The height of the upper and lower conveyor belts on the conveyor and the bottom plate of the heating furnace are the same height, and the heating furnace is moved up and down depending on the position of the shrink film attached to the bottle, and hot air is not applied to parts other than the shrink film. To do. E. FIG. If the difference between the heating furnace part and the upper part of the conveyor is 20 mm or more, the amount of heat given to the conveyor belt is small and there is no need for cooling, but if the difference becomes 10 to 0 mm, the heat of 80 to 90 ° C is applied to the conveyor belt. Because it is tinged, it is necessary to use a heat-resistant belt.

2. Exhaust tube section A. The heat-resistant blower 4A used is 0.4 kW,
The heat-resistant blower 4A is configured to adjust the amount of exhaust air by an inverter to cope with the relationship between the thickness of the shrink film and the temperature inside the heating furnace. B. The diameter of the horizontal iron pipes 4D and 4E is 100 mm, and the diameter of the vertical pipe of the air distribution pipe for air curtain is 50 mm.
And the width of the vertical groove-shaped air distribution opening is set to 2 mm.

[0019]

Since the present invention is configured as described above, the following effects can be obtained. 1. The heated high-temperature air is filled in the heating furnace, and the high-temperature air in the upper part is taken in by the heat-resistant fan,
Circulation is carried out in a state of rapidly discharging into the heating furnace part, and hot air of a constant temperature of 90 to 95 ° C. is forcibly blown from the air distribution pipe to the shrink film and immediately as in the case of putting in hot water. To shrink the shrink film,
The time and the size of the heating furnace were reduced. In addition, due to the air curtain of the air curtain distribution pipe alone, heat is less discharged from the entrance and exit to the outside of the heating furnace from the entrance and exit, and the heat loss is reduced by the amount of heat required for shrink film shrinkage and bottle heating, and hot air at the entrance and exit. Can be operated with a small amount of heat as it is discharged to the outside of the heating furnace as much as it hits the bottle and generates turbulence, and there is little external outflow from the opening for passing the bottle, which was the worried most, and the entrance It is conceivable that the amount discharged from the outlet is supplied from the lower opening, and conversely, it is possible to prevent the belt temperature from rising. In addition, a bottle containing granular starch was provided for use in a shrink vared denk machine for automation, and the finished product using the existing shrink tunnel was observed. It was found that the powder had adhered, and such a phenomenon was not observed in the shrink tunnel currently being used for trial production, and it was found that waste heat was not used in the bottle. 2. The present invention can minimize the heat generation energy. That is, in comparison with the conventional one, the conventional one requires about 17 to 18 kW of power consumption, and the present invention uses one 3.2 kW for heat generation, one 0.4 kW for the hot air fan, and one for the conveyor. Although two units of 0.2 kW are used, a total of 4.0 kW is sufficient, and 1/3 to 1
Only ４th power consumption is required.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view.

FIG. 2 is a perspective view with a part cut away.

FIG. 3 is an enlarged vertical sectional view.

FIG. 4 is a vertical sectional view taken along line AA.

FIG. 5 is a vertical sectional view taken along line AA.

FIG. 6 is a front view of the air distribution pipe for air curtain, with a part of the pipe being cut away.

FIG. 7 is a vertical sectional view taken along line BB.

FIG. 8 is a front view in which a part of a single air duct for shrink is cut away.

FIG. 9 is a vertical sectional view taken along line CC.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shrink tunnel 2 Conveyor part 3 Heating furnace part 4 Exhaust pipe part

Claims (4)

(57) [Claims] 1. A transfer conveyor section (2), a heating furnace section (3), and an exhaust pipe section (4). The transfer conveyor section (2) is a pair of left and right sides in the front-rear direction. Left and right conveyor belts (2B12, 2B22)
And the traveling speeds of the left and right conveyor belts are configured to be different on the left and right, and the heat generating furnace section (3) is provided with a heat insulating structure (3A) disposed to cover the upper surface of the conveyor (2B). And a far-infrared panel heater (3B) attached to the left and right sides of the case. The exhaust pipe section (4) includes a heat-resistant blower (4A) provided in the heating furnace section (3). A suction port (4B) of the heat-resistant blower opened in the furnace section (3), an exhaust port (4C) of the heat-resistant blower drawn into the heating furnace section (3) and an exhaust port (4C).
Group of left air distribution pipes (4F) arranged along the left side of the conveyor (2B) and the right group of air distribution pipes (4G) arranged along the right side of the conveyor (2B) The left air distribution pipe group (4F) includes a single air curtain air distribution pipe (4F1) which is closest to the outlet (3A31) in the heating furnace section (3), and the air curtain The air distribution pipe group (4F2) on the right consists of an appropriate number of shrink air distribution pipes (4F2) arranged in parallel with the air distribution pipes.
G) is a single air curtain air distribution pipe (4G1) which is closest to the entrance (3A21) in the heating furnace section (3).
And a suitable number of shrink air ducts (4G2) arranged in parallel with the air curtain air duct alone.
The air distribution pipes for the left and right air curtains are
It is configured to act as an air curtain for the outlet or inlet, and the right and left shrink air distribution pipes are at right angles to the shrink film attached to the bottle moving while rotating, and are blown strongly and instantly shrink A shrink tunnel, characterized in that the shrink tunnel is configured to be operated. 2. The transfer conveyor section (2) includes a gantry (2).
A) and a conveyor (2B) disposed on the gantry in the front-rear direction. The conveyor (2B) is a pair of left and right conveyor belts (2B12, 2B12, 2B22), and the traveling speeds of the left and right conveyor belts are configured to be different on the left and right. The heating furnace section (3) excludes the start (2B3) and end (2B4) of the conveyor (2B). A case (3A) having a heat insulating structure disposed so as to cover the upper surface of the portion, and far-infrared panel heaters (3B) attached to the left and right side surfaces of the case. A front inverted U-shaped entrance (3A21) is opened corresponding to (2B), and a front inverted U-shaped outlet (3A3) is provided at the lower center of the rear wall to correspond to the conveyor (2B).
1) was established, and a conveyor (2) was placed in the center of the bottom plate (3A5).
An opening (3A51) is opened to correspond to B), and the exhaust pipe section (4) includes a heat-resistant blower (4A) provided on the upper surface of the ceiling (3A1) of the heating furnace section (3), and a heating furnace. Inlet (4B) of heat-resistant blower opened on the lower surface of ceiling of part (3)
And an air outlet (4C) of a heat-resistant blower which is drawn into the lower surface of the ceiling of the heating furnace section (3) and a left side provided along a left side of a conveyor (2B) connected to the air outlet (4C). And a right air distribution pipe group (4G) arranged along the right side of the conveyor (2B), and the left air distribution pipe group (4F) is a heating furnace. Exit (3A) in part (3)
31) and the appropriate number of shrink air distribution pipes (4F1) arranged in parallel with the air curtain air distribution pipe alone (4F1). 4F2), and the right distribution pipe group (4G)
A single air curtain air distribution pipe (4G1) closest to the entrance (3A21) of the heating furnace section (3), and an appropriate number of air distribution pipes arranged in parallel with the air curtain air distribution pipe alone The left air curtain distribution pipe unit (4F1) is formed on the vertical cylinder (4F12) having the bottom (4F11) and the side wall of the vertical cylinder pipe (4F12). And a guide plate (4F14) connected to the center of the case (3A), and the height of the guide plate is set at the outlet (3A31). Of the right air curtain air distribution pipe (4), and the hot air from the air distribution port (4F13) flows out along the wall.
G1) is a vertical cylinder (4G12) having a bottom (4G11)
And a vertical groove-shaped air outlet (4G) formed on the side wall of the vertical cylinder.
13), a guide plate (4G14) is connected to the air distribution opening toward the center of the case (3A), and the height of the guide plate is configured to match the height of the entrance (3A21). At the same time, the hot air from the air outlet (4G13) is configured to flow out along the wall, and the left air duct for shrink (4F2) has a vertical cylinder (4F21) having a bottom (4F21).
F22), a vertical groove-shaped air outlet (4F23) formed on the side wall of the vertical cylinder, and a guide plate (4F24) connected to the air outlet toward the center of the case (3A). The shrink air distribution pipe unit (4G2) includes a vertical cylinder (4G22) having a bottom (4G21), a vertical groove-shaped air distribution port (4G23) formed on a side wall of the vertical cylinder, and a case provided in the air distribution port. A shrink tunnel, wherein a guide plate (4G24) is continuously provided toward the center of (3A). 3. The shrink tunnel according to claim 2, wherein a magnet is attached to a lower surface of the vertical cylinder in each of the shrink air distribution pipe and the air curtain air distribution pipe. 4. An inner vertical side (4F2) of the guide plate (4F24, 4G24) in the right and left shrink air distribution pipes alone.
The shrink tunnel according to claim 2, wherein the (5, 4G25) is formed vertically, and the inner vertical side (4F25, 4G25) is formed as an oblique side.