JPH1111434A - Device for sealing filling-packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool a heated sealing spot of packaging film in a short time directly after the sealing. SOLUTION: Upper and lower suspending members 13, 16 which revolve on elliptical orbits 15 above and under transferring paths 12 of a tube film 10 act to flatten the tube film 10 every time they come closer to each other. In this instance a pressing-down of a heat bar 23 with an upper fluid cylinder 21 causes two links 37, 38 connected to the heat bar 23 to be stretched out on two sides like a pantograph, releasing on the two sides the lower ends of cooling blocks 31, 32 on the two sides with a pin 25 as the axis and making the heat bar 23 weld the tube film 10 on the sealing stand 24. Subsequently by lifting the heat bar 23 the cooling blocks 31, 32 come closer to each other and cool the welded part of the film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt-like film moving at the same speed as a package around a package which is conveyed one after another on a horizontal orbit at equal intervals. The present invention relates to a sealing device for flattening and welding the tube film between the objects to be packaged while acting in block motion on the upper and lower sides of the tube film, respectively.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 6, a heat bar 4 and a seal table 5 are respectively moved along an elliptical orbit 6 above and below a horizontal transfer orbit 3 of a tube film 2 in which articles to be packaged 1 are housed at equal intervals in a column. An apparatus is known in which a block motion is performed, and the tube film 2 is flattened and welded between the packages by the heat of a heater 7 embedded in a heat bar.

[0003]

However, in the above device,
Heat and pressure are applied to the film 2 for a sufficient time by the block motion of the heat bar 4, but since the heat bar 4 and the seal base 5 release the pressure while the film 2 is in a molten state, the film melting portion is separated. There were easy drawbacks.

If the heater 7 is removed from the heat bar 4 and an impulse current is applied to a nichrome wire provided along the lower surface of the bar 4 every time the bar 4 and the seal base 5 sandwich the tube film 2, Immediately thereafter, there is a type in which the film melting portion is cooled by water flowing inside the seal base 5, but if this type of type is repeatedly ignited by the impulse current, one of the bars 4 becomes gradually hot. Therefore, there is a disadvantage that the film fusion zone cannot be hardened in a short time.

[0005]

According to the present invention, in order to solidify a melted portion of a film in a short time, a tube film accommodating articles to be packaged is separated by a horizontal orbit, and along an elliptical orbit above and below the horizontal orbit. A pair of parallel members that rotate in synchronism, and an upper fluid cylinder fixed to the upper surface of the upper member, supported by the lower end of a piston rod that penetrates through the upper member, and supports the lower member. A heat bar opposed to the upper surface of the seal base, and a pair of cooling blocks disposed in front of and behind the heat bar in the transfer direction of the tube film and having arms protruding upwardly supported by the upper frame via pins, respectively. And a heat removal element curvedly penetrated between the seal base and the heat bar from the lower end of each of the cooling blocks, and a pair of cooling blocks before and after the heat bar. Consists of a pantograph link connecting between said when heat bar by the power of the upper fluid cylinder is moved downward toward the seal base, both the cooling block by projecting the pantograph is configured to retract back and forth.

[0006]

The pair of parallel members moving in synchronism along the upper and lower elliptical orbits are separated from each other up and down, and then repeatedly approach each other. The heat bar provided on the lower frame and the seal base on the lower frame flatten the tube film. At this time, the heat bar is pressed against the seal base by the upper fluid cylinder on the upper frame, so that the tube film is sandwiched. Can be pressed and welded.

The cooling block pivotally supported on the upper erection member via a pin and provided before and after the heat bar is connected to the heat bar via a pantograph link. Is automatically retracted from the descending area of the heat bar in the opening direction by the downward movement of the heat bar. Therefore, the two cooling blocks return to the original fixed positions by the recoil of lifting the heat bar holding the tube film by the upper fluid cylinder. Therefore, the molten portion of the tube film is cooled by the contact of the heat removal elements at the lower ends of both cooling blocks.

[0008] The cooling of the film melting portion by the cooling block is performed by completely separating the heat bar from the film, so that the film melting portion can be cooled in a short time and reliably.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an upper frame 13 and a lower frame 14 rotate synchronously along an elliptical orbit, respectively, across a horizontal transfer path 12 of a tube film 10 accommodating an article 11 to be packaged. It is formed so that

As shown in FIG. 2, the pin 17 engaged with each of the upper and lower elliptical grooves 16 can be moved along the groove 16 by rotating the propeller 18. By connecting to the upper and lower frames 13 and 14 in FIG. 1, both frames rotate along the elliptical orbit 15. In this case, since the lower frame 14 is slidably engaged with the guide rod 50 hanging down from the upper frame 13, the upper and lower frames 13 and 14 rotate in an oblong orbit without tilting.

As shown in FIG. 3, the upper and lower members 13 and 14 are elongated in the lateral direction and are parallel to each other. Only one of the members is shown in the drawing. Engage with the elliptical groove 16,
3 and 14 can be moved along the groove 16 by rotation of the propeller 18. The upper fluid cylinder 2 provided on the upper frame
Heat bar 2 fixed to the lower end of the first piston rod 22
3 is opposed to a seal stand 24 fixed to the lower frame 14,
The upper end of the piston rod 26 of the lower fluid cylinder 25 below the lower frame supports a cutting blade 27 inside the seal base.

In FIG. 1, cooling blocks 31 and 32 provided before and after a heat bar 23 toward a transfer path 12 of a tube film are provided with arms 3 connected to the upper part.
3 and 34 are pivotally supported on the upper frame 13 via pins 35 and 36, while the heat bar 23 and the cooling blocks 3
1 and 32 are connected by two inverted V-shaped links 37 and 38.

In FIG. 5, when the heat bar 23 is pushed in the axial direction of the piston rod 22, the links 37 and 38 connecting the heat bar 23 and the cooling blocks 31 and 32 before and after the bar extend over the front and rear like a pantograph.
A pair of cooling bars 31, 32 pivotally supported by an upper frame member (not shown) with 36 open left and right about the pins 35, 36 as axes. This is the state shown in FIG. 4, in which the pair of cooling blocks 31 and 32 are retracted to an area where the lowering of the heat bar 23 is not hindered, so that the tube film 10 is pressed and welded between the heat bar 23 and the seal base. I do. Immediately after that, when the piston rod 22 is lifted in the direction opposite to the arrow 40, the curved heat-dissipating elements 41 and 42 of the two cooling blocks approach each other along the film welding position (the state shown in FIG. 1), and the cooling block is cooled. The film is cooled by the energy of the cooling water flowing in the passage formed in the film.

As shown in FIG. 4, a slit 43 into which the cutting blade 27 protrudes is formed at the center of the lower surface of the heat bar 23, so that the lower fluid cylinder 25 shown in FIG.
7 can be pushed up to cut the film welded portion.

[Brief description of the drawings]

[Fig. 1] Side view

Fig. 2 Configuration diagram of an elliptical orbit

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a partial operation view of FIG. 1;

FIG. 5 is a plan view of a heat bar and a cooling block.

FIG. 6 is an explanatory view of a conventional example.

[Explanation of symbols]

10… ‥ Tube film 11… ‥ Packaged object 12…
‥ Horizontal movement trajectory 13 ‥ Upper frame 14 ‥ Lower frame 15 ‥ Oval trajectory 21 ‥ Upper fluid cylinder 23
‥ Heat bar 24 台 Seal base 25 台 Lower fluid cylinder 27 ‥ Cutting blade 31, 32 ‥ Cooling block 33, 34 ‥ Arm 37, 38 ‥ Pantograph link 41, 42 ‥ Heat removal element 43… ‥slit

Claims (2)

[Claims] 1. A pair of parallel members vertically rotating along an elliptical path above and below a horizontal track of a tube film accommodating articles to be packaged at equal intervals; A heat bar supported by the lower end of a piston rod penetrating from the upper fluid cylinder fixed to the upper surface of the lower frame and penetrating the upper frame and facing the upper surface of the seal base of the lower frame, in a direction in which the tube film is transferred. A pair of cooling blocks that are arranged before and after the heat bar and that project upwards from the upper frame respectively via a pin, and the seal base and the heat bar from the lower ends of the cooling blocks. A heat-dissipating element that is curvedly interposed between the upper fluid cylinder and a pantograph link that connects the heat bar and a pair of cooling blocks before and after the heat bar. A sealing device for a filling and packaging machine, wherein when a heat bar moves down toward a seal table with the power of (2), both cooling blocks are retracted back and forth by extension of a pantograph link. 2. A cutting blade having a cutting edge arranged upward in the middle of a seal base and a piston rod protruding upward from a lower fluid cylinder fixed to a lower surface of a lower frame, while being connected.
The sealing device for a filling and packaging machine according to claim 1, wherein a slit for inserting the cutting blade is formed in the middle of the lower surface of the heat bar.