JPH085448B2 - Film packaging equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a film packaging apparatus for film-wrapping an outer periphery of an object to be packed, and particularly in winding the outer periphery of the object to be packed while applying tension with a film. The present invention relates to a film packaging device capable of preventing a film from being broken at a corner of an article to be packed.

[Prior Art] Conventionally, in film packaging, a so-called stretch packaging in which a thin transparent film is wound around a package to be packaged while being pulled around the packaged object. This film wrapping has an advantage that the object to be packed can be packed easily and in a short time, as compared with the conventional strapping method and carton case method.

[Problems to be Solved by the Invention] However, in this film packaging, when the object to be packaged has a sharp corner such as a laminate of sheet glass or a laminate of plastic plate and metal plate, tension is applied to the film. When starting to wind, there arises a problem that the film is cut at the corner.

For this reason, the applicant previously proposed a stretch packing method (Japanese Patent Application No. 60-271975).

This method will be described with reference to FIGS. 11 to 14. As shown in FIG. 14, the rod-shaped body c is arranged at the corner b of the article a to be packed,
In this state, the film e is unwound from the film roll d, and the film e is rotated while applying the tension to the film e by rotating the object to be packed a together with the rod c in the direction of the arrow shown in the figure.
Wrap around. FIG. 11 shows a state in which the film has been wound, and the film e is held by the rod-shaped body c while maintaining the tension. Next, the rod c is moved from the corner b to the center of the side from the state of FIG. 11 as shown in FIG. 12, and the rod c is pulled up as shown by the two-dot chain line in FIG. Film e wrapped around the film e and the object to be packed a
As a result of the tension, as shown in FIG. 13, it is brought into close contact with the outer periphery of the article a to be packaged, and the article a to be packaged is film-wrapped. In this case, the films e are laminated in multiple layers and have strength so that the films e will not be broken even if they hit the corners b.

As described above, the invention of the prior application can effectively solve the problem in film packaging.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a film packaging apparatus which utilizes the invention of the above-mentioned prior application and which can detect the positions of objects to be packaged in various sizes and sizes to automate the film packaging.

[Means and Actions for Solving Problems] In order to achieve the above-mentioned object, the present invention arranges a vertical protective frame at a corner portion of an article to be packaged having a polygonal horizontal cross section, and Wrap the film around the outer circumference several times while applying tension to the film together with the protective frame.
In the film packaging device that moves from the corner to the center side of the side of the object to be packed and extracts the film from the space between the film and the object to be packed to film-wrap the object to be packed, the corner position of the object to be packed is set on the protective frame. With a sensor to detect, the sensor detects the corners of the packaged object, detects the position of the packaged object, then positions the protective frame at that corner and rotates the packaged object with the protective frame. Then, by winding the film around the object to be packed, it is possible to prevent the film from directly hitting the corners of the object to be packed, and then move the protective frame and pull out the laminated film, and the tension is applied to the film to be packed. The film can be packaged so as to be in close contact with.

[Embodiment] Hereinafter, a preferred embodiment of a film packaging apparatus according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an example in which a packaged object obtained by collecting several boxes is film-wrapped.

In FIG. 1, reference numeral 1 denotes a turntable on which a package 2 is placed and rotated, and a conveyor 3 for carrying in and a conveyor 4 for unloading the package 2 are arranged before and after the turntable.

Provided on the turntable 1 is an object-to-be-packed transfer means 5 comprising rollers for receiving the object to be packaged 2 from the carry-in conveyor 3, and after packing, transferring the goods to the carry-out conveyor 4.

A protective frame unit 8 having protective frames 7 corresponding to the number of corners 6 of the article 2 to be packed is provided above the turntable 1. The protection frame unit 8 is provided with a support arm 10 that is vertically movable on a support column 9, and a base frame body 11 that is rotatably provided on the support arm 10 and has a rotation axis that matches the rotation axis of the turntable 1. And a support frame 12 provided below the base frame 11 and movable in the left-right direction when the base frame 11 is stopped, and a support frame 12 provided along the support frame 12 so as to be movable in the front-rear direction. The moving body 13 that supports
Consists of

Although not shown, the support arm 10 is moved up and down by an elevating device, and the base frame 11 is rotated by a rotary drive device 14 so as to be synchronized with the turntable 1 therebelow.

The support frame 12 is moved by a left-right moving device 15 such as a ball screw provided on the base frame 11, and the moving body 13 supporting the protection frame 7 is moved by a front-rear moving device 16 such as a ball screw provided on the support frame 12. Be moved.

Each of the protection frames 7 has a guide roller 17 and can be moved symmetrically with respect to the center of rotation by the lateral movement of the support frame 12 and the longitudinal movement of the moving body 13. As shown in FIGS. 2 and 3, the protective frame 7 is formed in a U-shaped cross section, and a sensor 60 for detecting the corner 6 of the article 2 to be packed is provided in the protective frame 7. In this sensor 60, as shown in FIG. 2, the protective frame 7 (or the object to be packed 2) moves in the front-rear direction (X direction) of the object to be packed 2 to detect the front and rear ends of the object to be packed 2. It includes a front-back direction detection sensor 60a such as an optical sensor and a left-right direction detection sensor 60b such as a touch sensor that detects the left-right width of the article to be packed 2 as shown in FIG. 3. With both sensors 60a, 60b, The guide roller 17 attached to the protective frame 7 is positioned at the corner 6 of the article to be packed 2.

The support 9 is provided with a film supply means 19 for winding the film 18 around the outer periphery of the article 2 to be packed. The film supply means 19 is provided on the column 9 so as to be movable up and down. Even if the width of the film 18 is smaller than the height of the article 2, the film supply means 19 moves up and down the film supply means 19 in order. The film 18 can be supplied accordingly.

 Next, the operation of this embodiment will be described.

The article to be packed 2 is transferred from the carry-in conveyor 3 to the object to be packed transfer means 5 on the turntable 1. After the transfer, the support frame 12 of the protective frame unit 8 is moved according to the left and right width of the object to be packed 2, and at the same time, the moving body 13 is moved according to the front and rear width of the object to be packed 2 to guide the protective frame 7. 17 is positioned at the corner 6 of the article to be packed 2 as shown.

In this case, the sensor 60 provided on the protective frame 7 automatically performs the process. That is, as shown in FIG. 2, the protective frame 7 facing in the left-right direction of the object to be packed 2 is moved as shown by the arrow in the figure while being separated from the left and right surfaces of the object to be packed 2 by a certain distance. The front-rear direction sensor 60a detects the front-rear ends of the object to be packed 2 and stops the front-rear movement of the protective frame 7, and then the left-right direction detection sensor 60b detects the left-right width of the object to be packed 2 as shown in FIG. While moving the protection frame 7 in the left-right direction as shown by the arrow in the figure, the guide roller 17 attached to the protection frame 7 can be accurately and automatically positioned at the corner 6 of the article 2 to be packed. Becomes

Next, the film 18 is sent out from the film supply means 19,
The tip is supported by the package 2 or the protection frame 7, and in this state, the turntable 1 and the protection frame unit 8 are rotated in the direction of the arrow in FIG. The film 18 is wound. In this case, the film supply means 19 supplies the film 18 so that a constant tension is applied to the film 18.

After winding the film 18 a predetermined number of times, the rotation of the turntable 1 and the protective frame unit 8 is stopped, and the end of the film 18 is cut by a cutter (not shown).

Next, the movable bodies 13 of the protective frame unit 8 are moved so that their front and rear sides are closer to each other, so that the protective frame 7 is moved from the corner 6 of the article to be packed 2 toward the center of the side, and the protective frame unit 8 is further raised. When the protective frame 7 is pulled out from between the film 18 and the article 2 to be packed, the film 18 comes into close contact with the outer periphery of the article 2 to be packed by the tension, and the article 2 to be packed is film-wrapped. In this case, since the sensor 60 can detect the size of the article 2 to be packed,
The moving distance of the protective frame 7 can be automatically selected and moved.

The packaged object 2 after the film packaging is completed is transferred to the unloading conveyor 4 by the transfer means 5, and the new packaged object 2 is again film-packaged as described above.

4 to 10 show another embodiment of the present invention, showing an example of film-wrapping an object to be packed made of laminated sheet glass.

First, as shown in FIG. 10, the article 2 to be packed is made up of a large number of laminated glass plates 20, and is placed on a pallet 21 to carry the article 2 to be packed.

The pallet 21 is composed of a cross-shaped frame body 22, has a hole 23 for handling for separating and lifting the object to be packed 2 from the pallet 21 as described later, and prevents displacement of the object to be packed 2. Also, a rubber pad 24 for absorbing shock is provided at an appropriate position on the frame body 22.

4 to 6 show the entire film packaging apparatus for the article to be packed 2 made of the plate glass 20, FIG. 4 is an overall perspective view, FIG. 5 is a plan view, and FIG. 6 is a front view.

This example is basically the same as the embodiment shown in FIGS. 1 to 3, but the rotation direction of the turntable 1 and the protective frame unit 8 is opposite to that of FIG. 1, and the pallet is placed on the turntable 1. A pallet separating device 25 for separating 21 and the article to be packed 2 is provided, and the transfer means 5 is a chain conveyor 26.
It is different in that it is lifted up and down by the table lifter 27 and the structure of the film supply means 19.

First, the turntable 1 is rotatably provided on a support base 28, and is rotated by a rotary drive device 29. The rotary drive device 29 rotates the protective frame unit 8 in synchronization with the turntable 1. That is, turntable 1
6 is transmitted to the timing gear 30 as shown in FIG. 6, and the rotation of the timing gear 30 is transmitted to the timing belt.
The gear 33 is attached to the ball spline shaft 32 provided in the support 9 from the base 31.
Is transmitted through. This ball spline shaft 32 has
A driven gear 34 provided on the support arm 10 of the protection frame unit 8 is spline-engaged, and the base frame 11 is rotated by the driven gear 34 via the timing belt 35 in synchronization with the turntable 1. . A lifting device 36 such as a hydraulic cylinder for raising and lowering the protection frame unit 8 is provided in the support 9.

As described with reference to FIG.
A support arm 10 rotatable up and down, a base frame 11 rotatably provided on the support arm 10, a support frame 12 provided on the base frame 11 and movable in the left-right direction by a moving device 15, and a protection frame 7 A moving body that supports
It consists of thirteen.

Further, the protective frame 7 is provided with a sensor 60 (see FIGS. 2 and 3) for detecting the corner 6 of the article to be packed 2.

On the other hand, a table lifter 27 is provided on the turntable 1 as shown in FIG. This table lifter 27
It comprises a table section 37 for supporting the chain conveyor 26 as the transfer means 5, a link mechanism 38 provided between the table section 37 and the turntable 1, and an elevating cylinder 39 for elevating the table section 37. .

As shown in FIGS. 7 and 9, the transfer means 5 is provided with sprockets 41 in front of and behind a support plate 40 provided in parallel along the front-back direction on the table portion 37, and the sprockets 41 are provided.
In between, a chain 42 having an attachment (not shown) for supporting the pallet 21 is chained over an endless chain conveyor 26. One sprocket 41 is connected by a shaft 43, and the shaft 43 is connected to an electric motor 44 and a transmission gear. It is designed to rotate at 45. A guide rail 46 is provided on the support plate 40 between the front and rear sprockets 41 to support the chain 42.

Between the chain conveyors 26, there is provided a pallet separating device 25 for holding the article 2 to be packed through the hole 23 of the pallet 21 and separating the article 2 and the pallet 21.

This pallet separating device 25 is a base plate attached to the center of the turntable 1 as shown in FIGS. 7 and 8.
A fixed head 49 provided on the fixed head 49 and side heads 50 provided on both sides of the fixed head 49 and capable of moving up and down with respect to the fixed head 49, the side head 50 being a base plate
A hydraulic cylinder 51 provided at 48 moves up and down. Further, as shown in FIG. 8, an opening 52 for inserting the separating device 25 is formed in the table portion 37 of the table lifter 27.

The fixed head 49 has three fixed head portions in the front-rear direction.
49A, 49B and 49C, and the side head 50 also has three lifting head portions 50A, 50B and 50C, respectively. These head parts 49A
Rubber pads 53 are attached to the surfaces of ~ C and 50A ~ C.

The head portions 49A, 49B, 49C of the fixed head 49 and the head portions 50A, 50B, 50C of the side head 50 are arranged so as to correspond to the holes 23 of the pallet 21, as shown in FIG. Heads 49A, 49B, 49C on the pallet 21 through the respective holes 23
And 50A, 50B, 50C can come and go.

In this case, each head part 49A, 49B, 49C of the fixed head 49 is fixed, and the height of the pallet 21 is lowered by the table lifter 27, so that the head part 49A,
49B, 49C can be projected, and each head 5 of the side head 50
The maximum height of 0A, 50B, and 50C is fixed.
It is designed to be at the same level as 49B and 49C. Further, the chain conveyor 26 can be moved up and down by a table lifter 27 from a position higher than the height of each head portion 49A-C, 50A-C to a position lower than the head portions 49A-C, 50A-C. I have.

As shown in FIGS. 4 and 5, the film supply means 19 includes two film supply rolls 54A and 54B, a guide roller 55 that guides the film 18, and a pinch roller 56 that applies tension to the film 18. A tension roller 57 for guiding the object to be packed 2 while applying tension, and a cutter 58 for cutting the film 18 at the end of winding.

Two film supply rolls 54A, 54B, when supplying the film with one of them 54A, the other 54B is a preliminary roll, if the film 18 of one 54A is gone, the other 54B at the end of the film 18 By stacking the films of the preliminary rolls, the film 18 can be continuously supplied.

Next, film wrapping by the film wrapping device shown in FIGS. 4 to 10 will be described.

First, the height of the chain conveyor 26 as the transfer means 5 is adjusted by the table lifter 27 so as to be at the same level as the conveyors 3 and 4 before and after the chain conveyor 26. In this case, the head portions 49A to C and 50A to C of the pallet separating device 25 are located at a position lower than the level of the chain conveyor 26. In this state, the packaged object 2 made of the plate glass 20 placed on the pallet 21 is moved together with the pallet 21 from the carry-in conveyor 3 to the chain conveyor.
The chain conveyor 26 is stopped at a position where the center of the packaged object 2 matches the center of the turntable 1.

Next, the head portions 50A, 50B,
50C is raised, and in that state, the lifting cylinder 39 (FIG. 7) of the table lifter 27 is driven to lower the table portion 37, and the chain conveyor 26 is lowered.
Although it descends together with the chain conveyor 26, the item to be packed 2 is supported by the head portions 49A to C, 50A to C of the pallet separating device 25, and the pallet 21 and the item to be packed 2 are separated.

Next, the guide roller 17 of each protection frame 7 of the protection frame unit 8
The support frame 12 and the moving body 13 are moved while detecting the corner 6 by the sensor 60 as described with reference to FIGS.

When the setting of the protective frame 7 is completed, the film supply means
When the film 18 is grasped from 19 by a grasping device (not shown) provided on the table portion 37 or the protective frame 7 and the turntable 1 is rotated by the drive device 29, the article to be packed 2 is separated by the pallet separating device.
At the same time, the protective frame unit 8 is rotated in synchronism with the turntable 1 through 25, and the film is packaged as described in FIG.

In this case, the supply amount of the film 18 is controlled by the pinch roll 56 of the film supply means 19, and the film 18 is maintained at an appropriate tension.

When the film 18 has been wound a predetermined number of times, the edge of the film is cut by the cutter 58, and then the protective frame 7 is moved from the corner 6 to the center side and the protective frame unit 8 is lifted to remove the protective frame 7. Complete the film packaging.

After completion, raise the table lifter 27 and
21. The chain conveyor 26 with the 21 placed thereon is lifted, the object 2 to be packed is transferred from the pallet separating device 25 onto the pallet 21, and then the chain conveyor 26 is driven to film-package the object together with the pallet 21. 2 is transferred to the carry-out conveyor 4, and a new object to be packed 2 is again film-wrapped as described above.

In the film wrapping shown in FIGS. 4 to 10, a film 18 for wrapping the outer periphery of the object to be packed 2 made of plate glass 20 from a pallet 21 is film-wrapped.
Can be wound with the lower portion of the package 2 lower than the lower portion of the packaged object 2. After the film packaging, the edge of the film adheres closely to the bottom and top edges of the packaged product 2, and is wound around the package 18 with the film 18. In addition, the upper and lower peripheral edges can be protected, and the laminated body such as the sheet glass 20 can be almost completely packaged without dislodging.

[Effects of the Invention] As is clear from the above, according to the present invention, the following excellent effects are exhibited.

(1) When film-wrapping the outer circumference of the item to be packed,
Since the film is wound with the protective frame applied to the corners of the article to be packed, the film is not broken at the corners at the beginning of winding.

(2) After the film is wound, the protective frame is moved from the corner and pulled out, and the film is wrapped by tightening the outer periphery of the packaged object with the tension of the whole wound film, so that the film is damaged at the corner. And can be film-wrapped uniformly throughout.

(3) By providing the protective frame with a sensor for detecting a corner of the article to be packed, the protection frame can be accurately positioned at the corner of the article to be packed, and automation of film packaging can be achieved. Especially, it is effective for automatically film-wrapping objects to be packed in various sizes.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention, FIG.
3 is a plan view showing the details of positioning the protective frame at the corner of the article to be packed in FIG. 1, FIG. 4 is an overall perspective view showing another embodiment of the present invention, and FIG. 4 is a plan view, FIG. 6
4 is a front view of FIG. 4, FIG. 7 is a view taken along the line VII-VII of FIG. 6, FIG. 8 is a detailed perspective view of the pallet separating device in FIG. 4, and FIG. 9 is IX of FIG. −IX line view, FIG. 10 is the 4th
Detailed perspective view of items and pallets in the figure, Fig. 11 ~
FIG. 14 is a diagram for explaining the invention of the prior application. FIGS. 11 and 12 are plan views showing a process of film-wrapping the object to be packed, and FIG. 13 is a plan view of the object to be packed after film packaging. FIG. 14 is a schematic perspective view showing a state of film packaging. In the figure, 1 is a turntable, 2 is an object to be packed, 5 is a means for transferring an object to be packed, 6 is a corner portion, 7 is a protective frame, 8 is a protective frame unit, 18 is a film, 19 is a film supply means, and 60 is It is a sensor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Ezaki 1-19-10 Mori, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Ltd. Koto office (72) Inventor Ken Enomoto 1-19-10 Mori, Koto-ku, Tokyo No. Ishikawajima Harima Heavy Industries Co., Ltd. Koto Office (56) Reference JP-A-49-96900 (JP, A) JP-A-62-135108 (JP, A) JP-A-55-107606 (JP, A) 59-196401 (JP, U) Actual development Sho-60-24703 (JP, U) Japanese Patent Sho 56-30246 (JP, B2)

Claims (1)

[Claims] 1. A protective frame which is vertical to a corner of an object to be packed having a polygonal horizontal cross section is arranged, and the film is wound around the outer circumference of the object to be packed several times while applying tension to the film together with the protective frame. In the film packaging device that moves the protective frame from the corner to the center side of the side of the object to be packed and extracts the film from the space between the film and the object to be packed into a film, the object to be packed is packed in the protective frame. A film packaging apparatus, characterized in that a sensor for detecting the corner position of the film is provided.