JPH0672418A - End-sealing device - Google Patents

Abstract

PURPOSE:To transfer also a small-sized package onto a transfer means such as a discharge conveyor in the next stage without letting the package drop after it is cut by an end sealing device. CONSTITUTION:Upper and lower top sealers 10, 11 are respectively arranged for every 90 degrees at respective rotating shafts 7, 8 counterposed up and down while holding a tubular film 2 between. Further, a backing plate 17 is mounted on the lower rotating shaft in the manner of freely swinging between adjacent lower top sealers 11, and the base end side 17a being the center of swinging of the backing plate is located on the front side in the direction of rotation of each lower top sealer and the free end side 17b can be located in the vicinity of the adjacent lower top sealer. The backing plate moves by a predetermined timing between a first position (film-uncut side), where the free end side 17b of the plate approaches the rotating shaft side, and a second position, where the free end side 17b is swung and erected from the first position to separate from the rotating shaft side and to receive a package; and the timing is controlled by an unshown cam mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end seal device, and more particularly to an end seal device used in a packaging device for producing a relatively small package.

[0002]

2. Description of the Related Art As is well known, generally, an end seal device is provided on the final stage side of a packaging device and seals a film inwardly of an object to be packaged at predetermined intervals in the lateral direction.
The package is manufactured by cutting. Then, in the end seal device, as a so-called rotary type, one top sealer is attached to each of the rotary shafts arranged above and below so as to sandwich the film, and these top and bottom top sealers are synchronized. By rotating and rotating to sandwich the film between them, the sandwiched film portion is melted and heat-sealed. further,
Normally, a cutter is built in each top sealer, so that the sealed portion is cut by the cutter.

By the way, in the case of a packaging apparatus for manufacturing a relatively small package, the predetermined distance before and after the film sealing / cutting is short. Therefore, when using a type in which one top sealer is attached to the above-mentioned one rotating shaft, it is necessary to rotate at high speed, not only the load given to the device becomes large, but also the top sealers sandwich the film. When moving, it is necessary that the moving speeds of both are almost the same, so it is necessary to rapidly reduce the speed immediately before the top sealers that have been rotating at high speed come into contact with each other, and speed up again again after the separation. The problem becomes more prominent. Therefore, conventionally, an end seal device having a structure in which a plurality of top sealers are arranged at equal angular intervals on one rotary shaft has been developed.

[0004]

However, in the above-mentioned conventional device, the end seal is passed through the device and is cut.
The individual wrapping body is transferred onto the discharge conveyor arranged in front of the advancing direction of the end seal device and is carried out, but the rotation axis, that is, the distance between the cutting position of the film and the discharge conveyor. Since at least the height of the top sealer provided in the end seal device is required, in the case of a small packaging object of the present invention, the total length is the separation distance between the end seal device and the discharge conveyor. It is almost the same as or shorter than the above, and there is a possibility that it cannot be transferred onto the discharge conveyor and falls. Further, even if it is long, if the length is such that the front part thereof is not placed on the discharge conveyor before being completely cut, there is a high possibility that it will drop as well.

The present invention has been made in view of the above background, and an object of the present invention is that even a small package does not drop after being cut by an end seal and can be discharged to the next stage. It is an object of the present invention to provide an end seal device that can be mounted on a transfer means such as.

[0006]

In order to achieve the above object, in the end seal device according to the present invention, a plurality of top sealers are arranged at equal angles on each of the rotating shafts which are vertically opposed to each other. An end-sealing device that seals and cuts by sandwiching a packaging film between upper and lower paired top sealers, and between the top sealers directly or indirectly adjacent to the rotating shaft arranged on the lower side. Is provided with a receiving plate that swings at a predetermined position. Further, means for swinging the receiving plate at a predetermined timing is provided. Then, by operating the swinging means, the receiving plates located on the rear side in the traveling direction of the upper and lower top sealer pairs in the meshed state are laid down, and the receiving plates are placed on the front side in the traveling direction of the upper and lower top sealer pairs. The positioned receiving plate swings so that its tip end side is lifted up to receive the lower surface of the manufactured package.

[0007]

[Function] The packaging film containing the article to be packaged is inserted and arranged between the rotation shafts (each top sealer) arranged above and below, and the packaging film is conveyed and the rotation shaft (top sealer).
It operates in synchronization with the rotation speed of. Then, the pair of top sealers arranged above and below sequentially contact and separate from each other. Then, when they come into contact with each other, a predetermined position of the packaging film is pinched, and sealing / cutting is performed. As a result, the package is separated from the packaging film, and the package is manufactured.

At this time, the manufactured package is transferred onto a discharging means such as a conveyor provided in the next stage and conveyed to a predetermined location. At the time of this transfer, a small package is end-sealed. Although an attempt is made to fall between the device and the discharging means, the operation of the swinging means swings the receiving plate located in front of the top sealer in contact with the top sealer in the advancing direction, and the tip of the receiving plate rises. The receiving plate receives the lower surface of the package, and the distance between the tip of the receiving plate and the discharging means is shortened, so that the package is prevented from falling and is smoothly transferred to the next discharging means or the like.

On the other hand, since the backing plate on the rear side in the advancing direction of the top sealers that are in contact with each other is in a lying state, that is, close to the rotating shaft side, it does not push the packaging film upward, Does not hinder transportation.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the end seal device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows an embodiment of the present invention, and in this embodiment, an example applied to a pillow packaging device for individually packaging candy, rice cracker and the like is shown. That is, in various devices (not shown) in the preceding stage, in the tubular film 2 formed in advance in a tubular shape,
The object to be packaged 3 such as a candy is moved on the conveyor 1 in a state where it is supplied and arranged at predetermined intervals. Then, in this state, it is supplied to the end seal device 5, and the tubular film 2 portions between the front and rear objects 3 and 3 to be packaged are welded in the lateral direction and cut to manufacture the package 6.

The end seal device 5 includes four upper top sealers 10 and a lower one on each side circumferential surface of the rotary shafts 7 and 8 which are arranged on both upper and lower sides of the tubular film 2 at 90-degree intervals. The side top sealer 11 is attached. The rotary shafts 7 and 8 are configured to rotate in synchronization with each other so that the top sealers 10 and 11 mesh with each other at a predetermined timing and pinch the films 2 and 3. As is well known, heating means such as a heater and a cutter for cutting the film are built in both top sealers 10 and 11.

Further, a discharge conveyor 14 for transporting the cut and manufactured package 6 is disposed in the subsequent stage of the end seal device 5 (on the front side in the traveling direction of the film or the like). Further, a cylindrical rotating brush 15 is arranged at a predetermined position on the carry-in side of the discharge conveyor 14 and abuts against the upper surface of the package 6 carried out from the end seal device 5, and applies a biasing force forward in the traveling direction. By giving, the smooth transfer of the package 6 to the discharge conveyor 14 side is ensured.

In the present invention, the receiving plate 17 is swingably mounted between the lower top sealers 11 constituting the end seal device 5. More specifically, in the receiving plate 17, the base end side 17a serving as the swing center is positioned immediately near the front side in the traveling (rotation) direction of each lower top sealer 11, and the free end side 17b of the receiving plate 17 is positioned. Can be positioned near the rear side in the advancing (rotating) direction of the adjacent lower top sealer 11. Further, the lower surface side of the free end side 17b is formed in a taper shape.

The receiving plate 17 swings and stands from the first position where the free end side 17b approaches the rotating shaft 8 side, and the free end side 17b moves from the rotating shaft 8 side. It moves at a predetermined timing between the second position and the second position. In this example, a cam mechanism is used as a device for swinging the receiving plate 17, which is specifically as follows. As shown in FIGS. 2 and 3, a plate cam 21 is non-rotatably fixed to the inner side surface of the bearing portion 20 to which one end of the rotary shaft 8 is rotatably mounted. Then, the rotary shaft 8 is inserted into the through hole 21a formed in the center of the plate cam 21, and the rotary shaft 8 is allowed to rotate. Further, on the inner side surface side of the plate cam 21, a groove cam portion 21b having a predetermined locus (see FIG. 3) in which the distance from the center is appropriately different is formed.

The rotary shaft 8 further inside the plate cam 21
On the side circumferential surface of the contact body, a connecting body 22 having a lateral U-shaped cross section at 90 degree intervals.
Are fixed, and rotate with the rotation of the rotary shaft 8. A through hole 22a is formed at a predetermined position of the connecting body 22 in parallel with the axial direction of the rotary shaft 8, and a rotary rod 23 is rotatably inserted into the through hole 22a. A swing plate 24 is attached to one end of the rotary rod 23 (the end portion on the plate cam 21 side). Specifically, as shown in FIG. 3, the oscillating plate 24 is inserted into a hole 24a formed in one end of the oscillating plate 24, and in the inserted state, the crevices 24b and 24b are screwed together.
Fasten with and reduce the distance between them to fix them.

The swing plate 24 is the same as the plate cam 2 described above.
1, the cam floor 26 is mounted on the facing surface side so as to match the cam groove 21b of the plate cam 21.
That is, the through hole 2 is provided at a predetermined position on the other end side of the swing plate 24.
4c is formed, a screw portion 26a standing upright on the center of the cam floor 26 is inserted into the through hole 24c, and a nut 27 is fastened to the tip protruding portion of the screw portion 26a to attach the screw portion 26a. .

On the other hand, a shallow recess 23a is formed at the other end of the rotating rod 23, and the base end 17a of the swinging receiving plate 17 is fixed in the recess 23a. There is. As a result, the cam floor 26 moves in the cam groove 21b in accordance with the rotation of the rotary shaft 8, and the swing plate 24 swings and further swings as the distance between the center of the plate cam 21 and the cam groove 21b changes. The rotating rod 23 connected to the moving plate 24 also rotates forward and backward. As a result, the receiving plate 17 also swings. That is, in this example, the rotating rod 23 and the swing plate 24 constitute a power transmission mechanism.

Next, the operation of the above-mentioned device will be described. Upper and lower films 3 and 2 in which the objects to be packaged are included
Is conveyed on the conveyor 1 at a predetermined speed and supplied between the rotary shafts 7 and 8 (top sealers 10 and 11) arranged above and below the end seal device 5. By the way, the pair of top sealers arranged above and below are sequentially brought into contact and separated from each other by the synchronous rotation of the rotary shafts 7 and 8. Then, when they come into contact with each other, the upper and lower films 3 and 2 are clamped at predetermined positions, sealed and cut, and the package 6 is manufactured.

At this time, the connecting body 22 and the oscillating plate 24 also rotate with the rotation of the lower rotary shaft 8, and the cam floor 26 moves in the groove cam 21b along the above-mentioned rotation direction. As a result, as described above, the receiving plate 17 is provided at a predetermined timing.
The oscillates, but at a specific timing, the receiving plate 17 located in front of the abutting top sealers 10 and 11 in the traveling direction is oscillated and the tip thereof is lifted (from the first plate to the second plate). Move). Therefore, the lifted back plate 1
At 7, the lower surface of the package 6 is received, and the distance between the tip of the receiving plate 17 and the discharge conveyor 14 is shortened. Therefore, the package 6 is smoothly transferred onto the discharge conveyor 14 without dropping. .

On the other hand, the receiving plate 17 (the lower film 2 before cutting) on the rear side in the traveling direction of the abutting top sealers.
Is located at the first position, that is, in the state of lying down, is closer to the rotating shaft side, so that the tubular film 2 (the object to be packaged 3) is not pushed upward and is conveyed. Does not hinder. Therefore, the top sealer 1 mentioned above
The pinching force of 0, 11 pairs surely seals and cuts the predetermined position of the film.

In the above-mentioned embodiment, a slight gap is generated between the receiving plate and the discharge conveyor.
As shown in FIG. 4, at least the tip of the receiving plate 17 'is formed in a comb tooth shape, and the discharge conveyor 14' is formed of a plurality of round belts 14'a so that the tooth portions of the receiving plate 17 'are round belts 14'. By allowing passage in the gap between a,
The receiving plate and the discharge conveyor may be partially overlapped with each other to completely prevent the package from falling.

[0022]

As described above, in the end seal device according to the present invention, the receiving plate positioned between the lower top sealers swings at a predetermined timing, so that the upper and lower portions of the packaging film are clamped at a predetermined position. The receiving plate on the front side in the traveling direction of the pair of top sealers can receive the package that has been stood up and is manufactured, and can reliably transfer the package while preventing it from falling. Also, since the backing plate on the rear side in the traveling direction of the top sealer pair is in a lying state, it does not urge the wrapping film located above the cutting film before cutting upward to smoothly convey it. Can be supplied to the end seal device.

[Brief description of drawings]

FIG. 1 is a front view showing a preferred embodiment of an end seal device according to the present invention.

FIG. 2 is a front view showing a means for swinging a receiving plate, which is one of the essential parts of the present invention.

FIG. 3 is a side sectional view of the same.

FIG. 4 is a view showing a modified example of a receiving plate in the end seal device according to the present invention.

FIG. 5 is a diagram showing a modified example of the receiving plate in the end seal device according to the present invention.

[Explanation of symbols]

 2 Cylindrical film (wrapping film) 3 Object to be packaged 5 End seal device 7 Rotating shaft 8 Rotating shaft (lower rotating shaft) 10 Upper top sealer 11 Lower top sealer 17 Receiving plate 21 Plate cam (perpendicular to rotating shaft Member having plane) 21b Groove cam 23 Rotating rod (power transmission mechanism) 24 Swing plate (power transmission mechanism) 26 Cam floor

Claims (2)

[Claims] 1. A plurality of top sealers are arranged at equal angles on the respective rotating shafts which are vertically opposed to each other, and the packaging film is sandwiched between the pair of top sealers, which form a pair, to seal and cut. An end seal device, wherein the rotary shaft arranged on the lower side, directly or indirectly,
A receiving plate that swings at a predetermined position between adjacent top sealers is provided, and means for swinging the receiving plate at a predetermined timing is provided, and the swinging means is operated to establish a meshed state. The receiving plates located on the rear side in the traveling direction of the upper and lower top sealer pairs are in a lying state, and the receiving plates located on the front side in the traveling direction of the upper and lower top sealer pairs swing to lift up the tip side thereof, which is manufactured. An end seal device designed to receive the bottom surface of a package. 2. The swinging means is connected to a receiving plate and a grooved cam of a predetermined shape formed on the flat surface of a member having a flat surface orthogonal to the lower rotation axis via a power transmission mechanism. The end seal device according to claim 1, further comprising: a cam floor that matches the groove cam.