JP2570537Y2 - Film coating equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film coating apparatus, and more particularly, to covering a top surface of a stretch-wrapped package with a film having a size sufficiently larger than the top surface, and a top surface of the package with the film. The present invention relates to a film coating apparatus having a function of binding a portion hanging down on the four side surfaces thereof with a tape-like stretch film in a horizontal direction.

[0002]

2. Description of the Related Art Prior to stretch-packaging an object placed on a pallet, a top surface of the pallet is a film having a size sufficiently larger than the top surface (hereinafter referred to as a top film).
2. Description of the Related Art Conventionally, a film coating apparatus for covering a film is known. For example, Japanese Patent Application Laid-Open No. 57-175511 discloses two types of film coating apparatuses. With these devices,
The packaged product whose top surface is covered with the top film is stretched on the side of the packaged product using a spiral or full web type stretch packaging machine from outside the edge of the top film hanging on the side surface. They were shipped with tension applied.

[0003]

However, there are some problems in such conventional packaging. First, when the stretch package as described above is loaded and unloaded in the rain, the edge of the top film covering the top surface of the package enters the inside of the stretch film around the top surface, so that the rainwater is removed from the top film. It often penetrated between stretch films to wet the items to be packaged. As a countermeasure, after stretching the side surface of the packaged object, cover the top surface with a top film having a size sufficiently larger than the size of the top surface, and tape a portion of the film hanging down on the side surface of the packaged object. Etc. were united.

[0004] On the other hand, an air layer is easily formed between the top surface of the packaged object and the top film, and the top film has conventionally been displaced between the film coating device and the binding machine.
The wind often turned up the top film and interrupted continuous work. The present invention has been made in view of such a situation, and a problem thereof is to prevent the top film from shifting or curling up in the coating step, while simultaneously covering the top surface of the packaged object with the top film, and applying the film to the top film. The object of the present invention is to provide a film covering device which can bind a portion hanging down on the side surface of a packaged object with a tape (of a stretch film).

[0005]

In order to solve the above-mentioned problems, a film coating apparatus according to the present invention comprises a conveyor for moving articles to be packaged, and a column provided adjacent to one side edge of the conveyor. An arm attached to the column so as to be able to move up and down, and protruding above the conveyor, attached to the arm;
A pair of support rollers for supporting the film winding, a pair of film supply rollers provided below the support rollers and rotating at the same peripheral speed as the speed of the conveyor, and a shaft of the pair of supply rollers via a cam clutch. A film covering portion having a film cutting mechanism in which a hot-wire knife and a backup member are attached to the tip of a swinging lever rotatably connected in one direction, and the film covering portion is adjacent to the front of the package in the traveling direction of the packaged object. The tape supply device is provided at a symmetrical position on both sides of the conveyor, and is provided adjacent to a tape supply device provided with a tension applying mechanism and the tape supply device is located forward of the packaged object in the forward direction. Two heaters are provided at an appropriate interval on one of a pair of holders that move back and forth from the symmetrical position in the directions facing each other. It is characterized by comprising a heater for sealing and a tape bundling part having a tape connecting device in which a hot wire knife is mounted between these heaters, and a backup member for pressing a film against the heater is mounted on the other holder. I do.

Further, in order to make the film covering the top surface of the package to be in close contact with the top surface, the holder that moves back and forth is located near the front of the package in the advancing direction of the package, and is substantially adjacent to the top surface of the package. It is recommended to install an air blower that blows air over the entire width.

[0007]

In the film coating apparatus of the present invention, a tape bundling portion is provided adjacent to the front of the film coating portion in the traveling direction of the package, and the top film is formed at the same speed as the moving speed of the package. By feeding the film, the top film is cut to a predetermined size at the film covering portion and covers the top surface of the packaged object, and at the same time, sequentially from the coated portion at the tape binding portion, on the side of the packaged object of the film. The effect of binding the hanging part with the tape is achieved.
Also, by blowing air over almost the entire width of the top surface of the packaged object in the post-process of the tape binding part (if necessary),
Purging air between the top film and the top of the package,
The effect of bringing the top film into close contact with the top surface of the package is achieved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings, but the present invention is not limited to this embodiment. 1 is a schematic side view of a film coating apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is an enlarged view of a main part of FIG. 2, showing a state immediately before a tape connecting apparatus connects a tape. Show. 4 to 6 are schematic side views for explaining the operation of the film covering portion of the apparatus of the present embodiment, and each figure shows a state at each stage of the operation. 7 to 11 are schematic plan views for explaining the operation of the tape binding portion of the apparatus of the present embodiment, and each figure shows a state at each stage of the operation. FIG. 12 is a partial plan view of a tape connecting device according to another embodiment of the present invention.

In the drawing, reference numeral 1 denotes a film covering portion, 2 denotes a tape binding portion, 3 denotes a chain conveyor, 4 denotes an object to be packaged, 5 denotes a top film winding, 6 denotes a top film, and 7 denotes a stretch film. Tape winding, 8 is a tape (of a stretch film), 9a and 9b are tape seams, 10
Is an air blower, 11 is a column, 12 is a chain, 13 is an arm, 14a and 14b are support rollers, 15a and 15
b is a film feeding roller, 16a and 16b are swing levers, 16c is a spring, 17 is a film cutting device, 18 is a hot wire knife, 19 is an anvil, 20 is a guide roller, 21 is a tape supply device, 22 is a tape connecting device, 23a and 23b are tape unwinding mechanisms, 24a and 24b
Is a brake roller, 25 is an endless chain, 26
a and 26b are holders, 27a and 27b are heat sealing heaters, 28 is a hot wire knife, 29 is an anvil, 31
Is a frame (of a conveyor), 32 is an endless chain, 33 is a drive motor, and 34a and 34b are beam switches.

Referring to FIGS. 1 to 3, a film coating apparatus according to the present embodiment includes a chain conveyor 3 for moving a package 4 and a film coating section 1 for coating the top surface of the package with a top film 6. The top film 6 is composed of a tape binding portion 2 which binds a portion of the top film 6 hanging down to the side surface of the package 4 with a stretch film tape 8.

The film covering portion 1 includes a column 11 provided adjacent to one side edge of the chain conveyor 3 and an arm which is moved up and down by a chain 12 driven by a motor (not shown) along the column. 13, a pair of support rollers 14a and 14b for supporting the top film take-up 4 and a pair of film feed rollers 15a and 15b driven by a motor (not shown) below the support rollers 14a and 14b. Is installed. A friction brake (not shown) is attached to one of the shafts of the support rollers 14a and 14b to appropriately stop the rotation of the top film winding 5. Also, the film feeding roller 15
Each of the shafts a and 15b is engaged with each other (not shown).
The swing levers 16a and 16b are rotatably connected in one direction via one cam clutch (not shown), like the gears. Further, a hot-wire knife 18 is attached to the tip of the swing lever 16a, and an anvil 19 is attached to the tip of the swing lever 16b. The hot-wire knife 18 and the anvil 19 constitute a film cutting device 17. Note that the swing levers 16a and 16b are provided with a tension spring 16c.
It is always open left and right.

The tape bundling unit 2 includes a pair of tape supply devices 21 provided in front of the arm 13 in the advancing direction of the packaged object and at symmetrical positions on both sides of the chain conveyor 3.
And a tape connection device 22 provided adjacent to the tape supply device in the forward direction in the advancing direction of the packaged object. The pair of tape supply devices 21 respectively apply tension to the tape unwinding mechanisms 23a and 23b for mounting the tape winding 7 of the stretch film, the pair of guide rollers 20 and the tape 8 unwinded from the tape winding 7. The tape connecting device 22 includes an endless chain 25 rotated by a motor (not shown), holders 26a and 26b mounted at symmetric positions on the chain, and , Two heat-sealing heaters 27a and 27b mounted at appropriate intervals, a hot-wire knife 28 provided between these heaters, and the holder 26
b.
(See Fig. 3)

Further, in the apparatus of the present embodiment, an air blower 10 is provided in the tape binding unit 2 in the traveling direction of the packaged object. The chain conveyor 3 includes a frame 31, a pair of endless chains 32, a drive motor 33, and beam switches 34a and 34b mounted on the frame 1 along the conveyor.

Next, the operation of the apparatus of this embodiment will be described mainly with reference to FIGS. In the apparatus of the present embodiment, prior to starting, as shown in FIG. 1, the top film take-up 5 is placed on support rollers 14a and 14b provided on the arm 13 of the film covering section 1, and the take-up takes place. The top film 6 unwound from is sandwiched between the film feeding rollers 15a and 15b, and is fed out from there by a dimension (as shown in FIG. 1) which reaches an appropriate height on the side surface of the packaged object. . As described above, the friction brake attached to one of the shafts of the support rollers 14a and 14b brakes the rotation of the top film winding 5. The arm 13 is moved up and down along the column 11 by a chain 12 driven by a motor (not shown). This is for the purpose of facilitating the exchange of the top film winding 5 and the film covering portion 1. And to adjust the height of the tape binding unit 2 in accordance with the height of the packaged object.

In the apparatus of the present embodiment, the chain conveyor 3 is started in response to a carry-in signal of an article to be packaged from an upstream device such as a palletizer, and the article to be packaged 4 is received on the conveyer. Transfer. As shown in FIG. 4, when the beam switch 34a detects the leading end of the packaged object 4, the film feeding roller 1 of the film covering unit 1
5a and 15b rotate in the direction of the arrow, and the top film is fed out at the same speed as the feed speed of the chain conveyor 3, and the top surface of the packaged object 4 starts to be covered with the top film 6. This state is shown in FIG. 4 and FIG. The swing arms 16a and 16b are provided with film feeding rollers 15a and 15b.
Is connected via a cam clutch, and does not swing when the film feeding rollers 15a and 15b feed the film, but swing only when the film feeding rollers 15a and 15b reversely rotate.

The rear end of the package 4 is a beam switch 34a.
, The tape binding step is started. (The tape binding step will be described later.) When the rear end of the packaged object 4 passes in front of the beam switch 34a, the chain conveyor 3 stops. Next, the film feeding roller 15
a and 15b are reversed, and the swing levers 16a and 16b are
And the film is cut by sandwiching the top film 6 between the hot wire knife 18 and the anvil 19 respectively attached to the end of the lever. When the cutting of the top film is completed, the chain conveyor 3 starts again, and starts feeding the packaged object 4 forward.

In the tape binding section 2, as shown in FIG. 7, the tape 8 unwound from the pair of stretch film tape take-ups 7 is provided with a pair of right and left guide rollers 20 and a brake roller for applying tension to the tape. The ends of the chain conveyor 3 are heat-sealed and connected (9a) at substantially the center of the chain conveyor 3 via the bases 24a and 24b.
As shown in (1), when the packaged object 4 advances, it is attached from the front side of the packaged object to the left and right side surfaces. When the rear end of the packaged object 4 passes in front of the beam switch 34b, the chain conveyor 3 stops again. Next, the endless chain 25 is driven by a motor (not shown), rotates in the direction of the arrow in FIG. 2, and the holders 26a and 26b attached to the chain move in the directions facing each other as shown in FIG. After attaching the tape 8 to the rear side surface of the packaged object 4, the tape is sandwiched between the holders as shown in FIG. Next, heat is applied to the heat sealers 27a and 27b and the hot wire cutter 28 attached to the holder 26a, and these heat sealers 27a and 27b are turned on.
27b and anvil 2 attached to holder 26b
The tape 8 is connected to the tape 9 by heat sealing, and the middle of these seams is cut by a hot wire cutter 28. Next, as shown in FIG. 11, the chain 25 rotates in the reverse direction, and returns the holders 26a and 26b to the origin.

In this way, the top surface of the package 4 is covered with the top film 6 and the portion of the film hanging down on the side of the package is bound with the stretch film tape 8. Then, a tape seam 9 b is provided on the rear side surface of the packaged object 4, and in the tape binding portion 2,
A tape seam 9a is formed on the stretch film tape 8 extending between the left and right tape supply devices 21.

In the tape connecting device 22, an air cylinder may be used as a means for sliding the holders 26a and 26b, and as shown in FIG. If the guide rollers 20a are attached before and after the direction, friction between the holder and the tape 8 can be reduced when the holder slides. Further, the air blower 10 blows air from above the top film 6 covering the top surface of the package 4 to expel air between the package 4 and the top film 6 rearward in the traveling direction of the package. Prior to binding, the top film 6 is brought into close contact with the top surface of the package 4.

[0020]

As described in detail above, according to the present invention, in order to prevent the top film from shifting or curling during the coating process, the top surface of the article to be packaged is simultaneously covered with the top film. It is possible to provide a film covering device capable of binding a portion of a film hanging down on a side surface of an object to be packaged with a stretch film tape.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a film coating apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of the apparatus of FIG.

FIG. 3 is an enlarged view of a main part of the apparatus of FIG. 2;

FIG. 4 is a schematic side view for explaining the operation of a film covering portion of the apparatus of FIG.

FIG. 5 is a schematic plan view for explaining the operation of the film covering portion of the apparatus of FIG. 1 following FIG. 4;

FIG. 6 is a schematic plan view for explaining the operation of the film covering section of the apparatus of FIG. 1 following FIG. 5;

FIG. 7 is a schematic plan view for explaining the operation of the tape binding unit of the apparatus of FIG.

8 is a schematic plan view for explaining the operation of the tape binding portion of the apparatus of FIG. 1 following FIG. 7;

FIG. 9 is a schematic plan view for explaining the operation of the tape binding portion of the apparatus of FIG. 1 following FIG. 8;

FIG. 10 is a schematic plan view for explaining the operation of the tape binding portion of the apparatus of FIG. 1 following FIG. 9;

11 is a schematic plan view for explaining the operation of the tape binding portion of the apparatus of FIG. 1 following FIG.

FIG. 12 is a partial plan view of the tape connecting device according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Film covering part, 2 ... Tape binding part, 3 ... Chain conveyor, 4 ... Packaged object, 5 ... Top film winding,
6 top film, 7 tape winding, 8 tape, 9
a, 9b: seam of tape, 10: air blower, 11
... pillar, 12 ... chain, 13 ... arm, 14a, 14
b: support roller, 15a, 15b: film feeding roller, 16a, 16b: swing lever, 16c: spring, 17: film cutting device, 18: hot wire knife,
19: anvil, 20, 20a: guide roller, 21
... Tape supply device, 22 ... Tape connection device, 23a, 2
3b: Tape unwinding mechanism, 24a, 24b: Brake roller, 25: Endless chain, 26a, 26b: Holder, 27a, 27b: Heat sealing heater, 2
8 hot wire knife, 29 anvil, 31 frame (of conveyor), 32 chain (endless), 33
Motor, 34a, 34b ... Beam switch

Claims (1)

(57) [Scope of request for utility model registration] (1) A side surface wrapped with a stretch film.
With a film coating device that coats the top surface of the package with a film
There are a conveyor for moving the articles to be packaged, of the conveyor - square rack pillars disposed adjacent to the side edges of vertically movable attached to said cross-pillar, arm projecting above the conveyor, the It mounted on an arm, a pair of support rollers for supporting the film take-up, the pair of film feeding rollers and the pair of feed rollers rotating at a peripheral speed of the speed and the same of said conveyors is provided below the support rollers A film covering portion having a film cutting mechanism in which a hot-wire knife and a backup member are attached to the tip of a swinging lever rotatably connected in one direction to a shaft via a cam clutch, and a packaged object of the film covering portion A tape supply device provided at a symmetrical position on both sides of the conveyor, adjacent to the front in the traveling direction, and provided with a tension applying mechanism; Two heat seals provided at an appropriate interval on one of a pair of holders which are provided adjacent to the front of the apparatus in the advancing direction of the object to be packaged and which move forward and backward in opposite directions from symmetrical positions on both sides of the conveyor, respectively. Heater and a heating wire knife between these heaters,
A tape bundling portion having a tape connecting device in which a backup member for pressing a film against the heater is attached to the other holder;
It is installed adjacent to the front of the equipment
Air over almost the entire width of the film covering the
Spray to create an air layer between the package and the top coating film.
Consists of an air blower that drives out the rear of the package in the direction of travel
A film coating apparatus characterized by being performed .