JPH0790854B2 - Cap sealing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for sealing a container opening with a heat-shrinkable film in a cap shape.

[0002]

2. Description of the Related Art Conventionally, as a method of supplying a blank formed of a heat-shrinkable film to a container mouth portion in a cap sealing device, a method of sandwiching and supplying the blank by a conveyor belt,
Although a method of adsorbing to an endless belt and feeding the same can be seen, there is a drawback in that any method causes troubles such as wrinkles and positional deviations.

As a method of heat shrinking, a container on which a blank is placed is conveyed by a conveyer conveyor while pressing the top surface of the container mouth with an endless belt, and hot air is jetted from both side surfaces to shrink heat. In that state, there is a device that is passed through a heat shrink tunnel to be heat shrunk. However, in the former method, since the container cannot be rotated because the top surface of the blank is pressed by the belt, both side surfaces of the container may shrink well and insufficient contraction may occur on the front and back surfaces.
In the latter method, the thermal efficiency of the heat-shrinkable portion is poor, and there is a possibility that the contents of the container may be adversely affected.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, in supplying a blank cut into one piece to a container mouth in a device for cap-sealing a container mouth with a heat-shrinkable film, there is no wrinkle and a positional shift. It is an object of the present invention to provide a cap seal device having a blank supply system capable of accurately and surely supplying a cap seal having excellent finish and aesthetic appearance.

Another object of the present invention is to improve the thermal efficiency in the heat-shrinking method and to provide a cap seal device for uniformly and uniformly shrinking the necessary parts in a short time in a short time, thereby providing a good finished aesthetic appearance. The purpose is to enable excellent cap sealing of.

[0006]

The first means of the present invention adopted to achieve the above object is to heat-shrink the blank supplied to the container mouth portion to be conveyed to cap-seal the container mouth portion. The device is a rotating wheel that intermittently rotates in the conveying direction in the upper vertical plane of the conveyer, suction heads radially arranged on the outer peripheral surface of the wheel, and the lowermost position of the suction head. A second aspect of the present invention is characterized in that it comprises a deviation preventing belt which is provided so as to face the conveyor and presses and conveys both ends of a blank placed on the container mouth, and the second means is the container mouth to be conveyed. A device for cap-sealing a container mouth by heat-shrinking a blank supplied to a primary heat-shrinking unit, a right-angle rotating unit, and a secondary heat-shrinking unit in series in a transfer area of a transfer conveyor. Prepared, primary and secondary heat absorption The part is composed of a holding belt facing the transfer surface of the transfer conveyor, and a pair of hot air nozzles provided on both sides of the transfer conveyor.The right-angle rotation part is a container in which the pair of belts are installed on the transfer conveyor so as to face each other. Is characterized in that it has a heat-shrinkable portion configured to act on the side surface of one of the belts so that one belt rotates and the other belt is fixed.

[0007]

[Function] Now, when the mark detection sensor 13 detects a mark from the material 1 being sent out, the material 1 is stopped and it is confirmed that the suction head 3 is waiting at the position of the cutter die 29. 20 works. The blank 2 punched by the cutter 25 is sucked and held by the suction head 3, and the rotary wheel 4 rotates intermittently. The rotating wheel 4 rotates intermittently in sequence, and at the position immediately below the wheel 4, it rotates while aligning the timing with the container 5 conveyed by the conveyor 7 and releasing the suction hold, and the blank 2 moves to the mouth of the container 5. Is supplied to. In this case, the speed of the suction head 3 and the speed of the container 5 on the conveyor 7 are synchronized.

Since the deviation prevention belts 6, 6 are provided immediately below the rotary wheel 4, the blank 2 whose suction holding is opened at the same time as the container 5 is
It is pressed by the belts 6, 6 on the container 5 and conveyed by the conveyer conveyor 7. The blank 2 together with the container 5 is transferred from the deviation prevention belts 6,6 to the holding belts 8,8,8 on the conveyor 7 and passes through the primary heat shrinking section 9. In the contraction section 9, the primary thermal contraction is performed by the hot air from the contraction nozzles 91, 91.

The container 5 is rotated at a right angle by the belts 101 and 102 at the right-angle rotation unit 10 which passes next, and subsequently passes through the secondary heat contraction unit 12. In the contraction section 12, secondary thermal contraction is further performed by the hot air from the contraction nozzles 112, 112, and the thermal contraction (cap sealing) of the blank 2 placed on the container 5 is completed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view of a cap sealing device according to the present invention, which comprises a cutter unit 20 for cutting a blank 2 from a raw material 1, and a blank supply unit 30 for placing one blank 2 and placing it on the container mouth. The primary heat contraction section 9, the right angle rotation section 10, and the heat contraction section 40 including the secondary heat contraction section 12.

The original fabric 1 is made of a heat-shrinkable film and is wound in a long shape. The original fabric 1 is sent out by the sending-out roll 12 through an appropriate guide roll 17,
The tension is adjusted through the dancer roll 14, passes through the mark detection sensor 13, and is supplied to the cutter unit 20. The cutter unit 20 includes a cutter die 29, an annular cutter 25 and a cutting blank pressing piece 34 as shown in FIG.
Is fixed to a holder 24, and the holder 24 is connected to a rod 22 which is pivotally supported by a fulcrum 23 provided eccentrically on a wheel 21 which is rotated by another drive source, and is perpendicular to the surface of a cutter die 29 by a guide (not shown). Driven in the direction of (arrow C) so that it can move forward and backward. Further, the holder 24 is provided with film pressing pieces 28 at four positions which equally divide the periphery of the cutter 25, and presses the original film 1 of the film to be cut by the cutter 25 against the die 29 by the force of the spring 27. . The die 29 has a cutter
An opening 29a is provided at a position facing 25, and a notch 29b is provided on the back surface of the die 29 so as to engage with the rotating suction head 3 in good condition.

The annular cutter 25 is provided with serrated teeth at the tip of the annular body, but is not limited to this and may be any one that punches the blank 2 in accordance with the shape of the container mouth. Good. The take-up roll 16 feeds the remaining film of the original fabric 1 obtained by punching the blank 2 with the cutter unit 20, and the roll 15,
Take it up through the guide roll 17.

The blank 2 is punched from the raw material 1 by the cutter portion 20, and at the same time as the blanking, the blank 2 is pushed down by the cutting blank pressing piece 34 and sucked and held by the suction head 3 standing by below. The blank supply unit 30 includes a rotating wheel 4 that intermittently rotates in the transport direction in the vertical plane above the transport conveyor 7.
And a suction head 3 for adsorbing and transferring the blank 2 supplied to one sheet, and deviation preventing belts 6, 6 for pressing and transporting the blank 2 placed at the container mouth onto an opposing conveyor 7.

The rotating wheel 4 is a plate-shaped donut-shaped wheel, which is arranged in a vertical plane on the conveyor 7 and is moved in the direction of arrow A (conveying direction) by a drive device (not shown). Rotate intermittently. The wheel 4 is provided with a plurality of suction heads 3 on its outer periphery in a radial and even arrangement, and the head 3 is positioned directly below the wheel 4 so as to receive the cut blank 2 at the position of the cutter section 20. Then, it faces the conveyor 7 and the conveyor 7
The container is arranged so as to face the mouth of the container which is placed and conveyed. The intermittent rotation of the wheel 4 is synchronized with the timing at which the container mouth placed and conveyed on the conveyor 7 passes a predetermined position.

As shown in FIGS. 2 and 3, the suction head 3 receives the blank 2 punched by engaging the notch 29b at the position of the cutter 20 with the blank holding surface 33 as the outer peripheral surface, and receives the blank 2 on the blank holding surface 33. Hold by adsorption. The suction head 3 rotating intermittently releases the suction holding of the blank 2 in synchronization with the container 5 transported by the transport conveyor 7 in the horizontal direction (arrow B) directly below the rotary wheel 4.

A suction port 31 is appropriately provided on the blank holding surface 33 of the suction head 3, and the suction port 31 is connected to a suction hose 32. The other end of the suction hose 32 is connected to the wheel 4, is adjacent to the end face of the wheel 4 in a sealed state, and is connected to a negative pressure source provided so as to be connected to the other end of the suction hose 32 at a required position. . It is connected or closed synchronously with the suction groove (not shown). It should be noted that the size of the blank holding surface 33 may be any size as long as it sucks and holds the central portion of the blank 2, and both end portions of the blank 2 can be pressed against the container mouth portion by the deviation prevention belts 6, 6. Good. Furthermore, since the blank holding surface 33 is formed as a curved surface having a radius concentric with the rotating wheel 4, it is possible to smoothly transfer the blank 2 from one end when transferring the blank 2 onto the container 5. .

As shown in FIG. 3, the displacement prevention belts 6 and 6 are provided under the rotary wheel 4 immediately below the suction head 3 and the container 5.
And are provided in a position synchronized with each other. Belts 6 and 6 are containers
The upper surface of a transfer conveyor 7 that transfers 5 in a horizontal direction is provided in parallel so as to face both ends of the blank 2 transferred onto the container 5 so as to press the same. In addition,
The belts 6 and 6 are narrow synthetic resin or rubber belts and are good in heat resistance. They are wound around the pulleys 61 and 62 mounted on the cantilevered shafts 63 and 64 and the roller 81 mounted on the belt drive shaft 82, respectively. The rotation speed of the belts 6 and 6 is the conveyor belt 7
It is continuously rotating in synchronization with.

The conveyer conveyor 7 is a belt conveyer that passes directly below the wheel 4 and conveys the container 5 in the horizontal direction (arrow B), and subsequently the container 5 is passed through the heat shrinking section 40 to seal the cap seal. After the completion, the same container 5 is discharged. The press belts 8,8,8 are alternately wound around the rollers 81 with the deviation prevention belts 6,6 sandwiched therebetween, and the press belts 8,8,8 face the conveyor 7 and the deviation prevention belts 6,6 are Blank on container 5 that has been pressed and conveyed onto the conveyor 7
2 is continuously received, and the blank 2 is pressed and conveyed onto the container 5 that passes through the heat shrinking section 40 in the same state.

As shown in FIGS. 1 and 4, the heat shrinking section 40 includes a primary heat shrinking section 9, a right-angle rotating section 10 of the container 5, and a secondary heat shrinking section 12 in the transport area of the transport conveyor 7. , Presser belt
8,8,8 are guided by appropriate guide rolls 84,84,
In the primary heat shrink part 9, press the blank 2 on the container 5 and
It opens at the right-angle rotation part 10 and again at the secondary heat shrinking part 12.
Blank 2 above 5 is pressed and transported.

In the primary heat shrinking section 9 and the secondary heat shrinking section 12, a pair of hot air nozzles 91, 91, 112 and 112 are provided on the transfer conveyor.
Blanks made of heat-shrink film, which are provided on both sides of 7, and inject appropriate hot air from below the presser belts 8,8,8.
Heat shrink 2 FIG. 5 shows a sectional view of the primary heat-shrinkable section 9 at right angles to the container conveying direction. The hot air nozzle 91 is provided in a slit shape at the tip of a nozzle body 92 as shown in FIG. 5, and an appropriate number of cartridge heaters 96 are embedded in the body 92 to be heated and an air passage 93 leading to the nozzle 91. Is provided. Many fins 94 project from the main body 92 to the air passage 93, and heat the compressed air passing therethrough. That is, the air passage 93 is connected to the compressed air source by the pipe 95,
Container 5 that is transported by the transport conveyor 7 by sending compressed air continuously or intermittently as required.
It is possible to inject hot air into.

The structure of the secondary heat shrinking section 12 is as follows:
The same configuration as the above is sufficient, and the hot air amount, hot air temperature, and hot air velocity may be set for both the contracting portions 9 and 12 as necessary. The right-angle rotation unit 10 is shown in FIGS. The rotating part 10 is provided in the transfer area of the transfer conveyor 7 between the primary heat contraction part 9 and the secondary heat contraction part 12, and acts a pair of belts 101, 102 on the container 5 placed on the conveyor 7 and transferred. Let the same container 5
Is to rotate by about 90 °.

The mechanism of the right-angle rotation unit 10 is as shown in FIG.
By sandwiching the side surface of the cylindrical container 5 of diameter D from both sides with belts 101 and 102, one belt 101 is driven at a peripheral speed of 2V (V is the speed of the conveyor 7), and the other belt 102 is fixed at a peripheral speed of zero to cause friction. It is possible to use the force to rotate it by about 90 degrees. As shown in FIG. 7, various dimensions L, l,
Assuming A, B, D, d ₀ , d ₁ and angles α, β, θ, φ, the contact length 2L between the container 5 and the belt 101 corresponds to φ / 2π of the entire circumference of the container 5, so It becomes number 1.

[0023]

[Equation 1]

If there is a change in the diameter D of the container 5, FIG.
It is necessary to slide the four pulleys 103 of No. 3 in a certain direction, and the value of B is the following Expression 2.

[0025]

[Equation 2]

By deleting D from the equations 1 and 2, the following equation 3 is obtained, and the orbits X and Y represented by the equation 3 indicate the directions in which the four pulleys 103 slide.

[0027]

[Equation 3]

Next, when the circumference R of the belts 101 and 102 is calculated,
Since the following equations 4 and 5 are obtained from FIG. 7, the circumferential length R is represented by the following equation 6.

[0029]

[Equation 4]

[0030]

[Equation 5]

[0031]

[Equation 6]

That is, with respect to the device for rotating the container 5 by φ = π / 2 (right angle), the circumference R of the belts 101 and 102 when the diameter D of the container 5 changes is calculated. 40 as a variable
Table 1 below shows the values of A and R when ≦ D ≦ 80 (mm) and d ₁ = d ₀ = 30 (mm).

[0033]

[Table 1]

From Table 1, it can be said that when the diameter D of the container 5 is 40≤D≤80, the peripheral length R of the belts 101 and 102 hardly changes if A = 143 (mm). Belt 101
Is a drive pulley 104 that is connected to the drive shaft of the conveyor 7 and has a peripheral speed that is twice the conveyor speed V of the conveyor 7 and 2V.
It is hung on two slide pulleys 103, 103. The slide pulleys 103, 103 are rotatably supported by the racks 107, 107, respectively, and the racks 107, 107 are guided by the slide guides 108, 108 so as to be linearly movable in the directions of the tracks X, Y. The racks 107,107 mesh with the pinions 106,106, and the worm wheels 109,109 are provided coaxially with the pinions 106,106 to provide one worm gear 110.
Connected to.

The belt 102 is stretched around two slide pulleys 103, 103 having the same mechanism as the belt 101 and a non-rotating stop pulley 105. If necessary, a brake device may be attached to the stop pulley 105 or the belt 102 to ensure that the rotation of the belt 102 is zero. The two worm gears 110,110 are coaxially mounted and have a handle at one end.
111 is installed. That is, when the size of the container 5 changes, it can be dealt with by operating the handle 111 to linearly move the four slide pulleys in the directions of the tracks X and Y.

[0036]

According to the cap seal device of the present invention,
The blank 2 cut into one piece is accurately supplied to the container 5 by the blank supply unit 30 without any wrinkles and without misalignment, and the primary heat shrinking unit 9
After it is heat-shrinked by, the container 5 is rotated at a right angle by the right-angle rotation unit 10 and further heat-shrinked by the secondary heat contraction unit 12, so that the necessary parts are continuously and uniformly shrunk in a short time. Thus, it is possible to achieve a cap seal having a good finish and an excellent aesthetic appearance, and it is possible to improve the thermal efficiency in the heat shrink method.

[Brief description of drawings]

FIG. 1 is a side view showing the overall configuration of a cap seal device according to the present invention.

FIG. 2 is a detailed perspective view of a cutter unit.

FIG. 3 is a perspective view of a blank supply unit.

FIG. 4 is a plan view of a heat shrinking portion.

FIG. 5 is a cross-sectional view of the primary heat-shrinkable section perpendicular to the container transport direction.

FIG. 6 is a schematic perspective view showing a mechanism of a right angle rotation unit.

FIG. 7 is an explanatory diagram for explaining a mechanism of a right angle rotation unit.

[Explanation of symbols]

 1 Raw fabric 2 Blank 3 Suction head 4 Rotating wheel 5 Container 6 Misalignment belt 7 Conveyor 8 Presser belt 9 Primary heat shrinking part 10 Right angle rotating part 12 Secondary heat shrinking part 20 Cutter part 30 Blank supply part 40 Heat shrinking part

Claims (2)

[Claims] 1. A device for heat-shrinking a blank supplied to a container port to be transported to cap-seal the container port, the rotating wheel being intermittently rotated in the transport direction in an upper vertical plane of a transport conveyor. And a suction head radially arranged on the outer peripheral surface of the wheel, and a suction conveyor provided at the lowermost position of the suction head so as to face the conveyor and press and convey both ends of a blank placed on the container mouth. A cap seal device, comprising: a deviation prevention belt. 2. A device for heat-shrinking a blank supplied to a container opening to be conveyed to cap-seal the container opening. A moving part and a secondary heat shrinking part,
The secondary heat shrinking section consists of a holding belt facing the carrying surface of the carrying conveyor and a pair of hot air nozzles provided on both sides of the carrying conveyor, and the right-angle turning section has the pair of belts facing each other on the carrying conveyor. A cap seal device having a heat shrinking portion configured to act on a side surface of a container, rotate one belt, and fix the other belt.