JPH09240640A - Packaging material recovering method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recover a packaging material in an unbulky state and, moreover, recover the same in association with unsealing work by clamping and pulling out an unsealed edge of the packaging material cut and unsehled and winding the packaging material around a reel to take it up. SOLUTION: Packaged articles M unitarily packaged with a packaging material S is placed on a rotary table T together with a pallet P, and a unloading means 10 mounted to an ascending and descending stand 23 is lifted to vertically cut the packaging material S at a substantially intermediate portion on a side face of the packaged articles M. An upper edge of the packaging material S is pulled apart the packaged articles M by a catching means 30 in the vicinity of the top of the packaged article M positioned in the uppermost step, one of the unsealed edges is clamped and pulled out by a pulling means 40, the packaging material S thus pulled out is locked to a reel 50 by a swingable arm 60, and the packaging material S unwound from the packaged articles M is taken up by rotating the reel 50.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a packaging material collecting method,
In particular, a method for recovering the film-like packaging material from a packaging in which a large number of articles to be packed in a stacked state are covered with a packaging material made of a synthetic resin sheet or film such as a stretch film so as not to collapse the load. It is about.

[0002]

2. Description of the Related Art As shown in FIG. 9, a packing of this type is made of a stretch film or the like which is highly stretchable with respect to a large number of articles (M) (M) stacked on a pallet (P). Material (S)
Is wrapped and covered with the packaging material (S) so that the objects to be packed (M) (M) are tightened as a whole. As a result, the items to be packed (M) (M) are put together on the pallet (P) as one lump, and thus the load collapse can be prevented.

In this packaging, since the stretch films have a property of pseudo-bonding to each other, the article to be packaged (M)
There is an advantage that the above-mentioned packed state can be obtained by simply winding it around.

[0004]

[Problems to be Solved by the Invention] However, after the packaging material (S) is unpacked and the items to be packaged (M) (M) are taken out, There is a problem that cleaning up is troublesome. At the time of unpacking, first, as shown in FIGS. 9 and 10, a floating device (10) for floating the packaging material (S) from the article (M) to be packed and a fusing heater ( 1
9) by integrally raising the above-mentioned packaging material of the packaging body.
Open (S). However, since the stretch films as the packaging material (S) are pseudo-bonded to each other, they cannot be compactly collected when they are collected because they stick to each other in a bulky state.

The present invention has been made in view of the above point, and is described as follows: "The packaging material for a package in which a packaging material (S) made of a synthetic resin sheet or a film is wrapped around an object to be packaged (M).
(S) is a method of cutting and unsealing and separating and recovering from the object to be packed (M) '', so that the packaging material (S) can be recovered in a bulky state and can be continuously recovered during the unsealing operation. The task is to do.

[0006]

[Means for Solving the Problems] The technical means of the present invention for solving the above-mentioned problems includes: a step of placing the packaging body on a rotary table and cutting and opening the packaging material (S); The process of clamping and pulling out the unsealed edge (S ₁ ) of the packaging material (S) and entwining it with the reel (50), and rotating the reel (50) to unwind it from the object to be packed (M). And a step of winding the packaging material (S).

By this means, the packaging material (S) is cut and opened.
After being opened, the opening edge (S₁) Is torn from the item to be packed
It is pulled out like this, but the package is a rotary table
The package is rotated according to the withdrawal amount.
Turn over. Therefore, with the package still supported in place,
The wrapping material (S) is₁) Side sequentially
It will be. The unsealed edge (S
₁) Is entangled in the reel (50) and then this reel
Packaging material unwound from the object to be packed (M) by rotating (50)
(S) is wound on the reel (50).

In this way, the packaging material (S) is reeled from the unsealed edge (S ₁ ) side with the object to be packaged (M) left in place.
Can be wound to (50). The opening edge (S ₁ ) of the packaging material (S) may be clamped before the step of cutting and opening the packaging material (S), during the cutting and unsealing, or after the cutting and unsealing. According to the invention of claim 2, "the reel
The winding shaft (51) of (50) is openable and closable between the open state in which the packaging material (S) is opened and the closed state in which the packaging material (S) is clamped, and the open end edge (S ₁ ) Is clamped, pulled out, and entwined with the reel (50).
(S) withdrawing step of pulling out to the portion of the winding shaft (51) in the open state, and after this withdrawing step, the winding shaft (51)
And a step of rotating the reel (50) thereafter.

In this case, the unsealed edge portion (S ₁ ) is pulled out to the portion of the winding shaft (51) in the open state, and thereafter the winding shaft (51) is closed. Packaging material (S)
Since the reels are entangled with each other, the winding start operation by the reel (50) is smooth. Further, as in the invention of claim 3, "in the reel (50), a winding shaft (51) continuously provided on one of the first flanges (52) is arranged with respect to the other second flange (53). The winding shaft (51) can be moved back and forth in the axial direction and the second flange (5
In the opened state retracted from 3), the unsealed edge portion (S ₁ ) is pulled out between the winding shaft (51) and the second flange (53), and then the pulling-out edge portion (S ₁ ) is stopped and The take-up shaft (51) is advanced so that the opening edge (S) is formed between the winding shaft (51) and the second flange (53).
_{In 1} ), the unsealed edge portion (S ₁ ) is pulled out between the winding shaft (51) and the second flange (53),
After that, since the unsealed edge portion (S ₁ ) is clamped by the winding shaft (51) and the second flange (53),
The wrapping of the packaging material (S) around the winding shaft (51) is more reliable. Further, since the winding shaft (51) moves forward and backward with respect to the second flange (53), the structure for opening and closing the winding shaft (51) can be simplified.

[0010]

According to the first aspect of the present invention, after the packaging material (S) is opened, the winding operation from the unsealed end edge (S ₁ ) of the packaging material (S) places the packaging body in a fixed position. Since it can be carried out continuously as it is, workability from opening the packaging material (S) to winding is good. According to the invention of claim 2, when winding the packaging material (S), the operation of entwining the unsealing edge portion (S ₁ ) with the winding shaft (51) can be smoothly performed.

According to the invention of claim 3, the opening end edge portion (S ₁ )
The winding shaft (51) can be more reliably entangled with the winding shaft (51), and the structure for opening and closing the winding shaft (51) used for this purpose can be simplified.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the embodiment of the present invention described above will be described in detail with reference to FIGS. The embodiment shown in the drawings is configured as shown in FIG. 1 as a whole, and a packaging material (S) made of a synthetic resin film or a synthetic resin sheet surrounding a material to be packed (M) (M) is heated by a heater. The device is such that the packaging material (S) is opened and wound on a reel (50).

Items to be packed (M) (M) are piled up on a pallet (P) placed on a rotary table (T), and the packaging material (S) is wound around the side of the pallet (P) to be integrated as a whole. It is packed. And, a lifting device is provided on the side of the rotary table (T).
(20) is provided, and the floating device (10) is attached to the lifting device (20). Near the top of the topmost item (M) (M) to be packed, pull the upper edge of the packaging material (S) onto the upper end of the lifting device (20) and pull it away from the item (M) to be packed. Hanging device (30),
When the packaging material (S) pulled by the hooking device (30) is opened, a pulling device for picking and pulling one of the two
(40), a swing arm (60) for locking the strip-shaped packaging material (S) pulled by the pulling device (40) to the reel (50)
Are provided.

The elevating device (20) is constructed such that the elevating table (23) is paired with the feed screw (21) and the guide shaft (22), and the feed screw (21) is rotationally driven by the drive unit (24). The elevator table (23) is raised and lowered according to this. The lift table (23) is provided with a floating device (10). The floating device (10) and the heater as a cutting means (19) for cutting the packaging material (S) are, as shown in FIGS. 2 and 3, an elevator (23).
It is attached to.

The floating device (10) includes a support base portion at a lower end of a movable arm (25) which is swingably supported by the lift base (23).
(28) It is composed of a pair of roller devices (R) and (R) supported at regular intervals. Each roller device (R) has the movable arm
A clamp roller (11) (11) and a guide roller (11) rotatably supported by a bearing plate (26) projecting from a support base (28) at the lower end of (25) toward the article (M) to be packed. 12), and each roller is arranged outside the bearing plates 26, 26.
The clamp rollers (11) (11) are arranged in parallel in a horizontal direction so as to make rolling contact with each other.
The unopened lower end of (S) is inserted. Therefore, the bearing plate (26) has a notch (261) between the clamp rollers (11) and (11) that opens upward. The bearing plate
A guide roller (12) is attached to the tip of the (26) and is in rolling contact with the clamp roller (11) on the tip side of the bearing plate (26). The guide roller (12) is located obliquely below the one clamp roller (11).

The cutting means (19) is a heater made of a wire material having a high electric resistance such as a nichrome wire, and its mounting position is substantially aligned with the central position of the clamp rollers (11) (11). The movable arm (25) horizontally projects from the support base (28) toward the article (M) to be packed.
The movable arm (25) is swingably supported at one end of the lift table (23), and the input end protruding above the lift table (23) has an urging means (27) such as an air cylinder or a hydraulic cylinder. ) Output shaft is connected. By the biasing means (27), the support base (28)
Is always urged to advance to the side of the object to be packed (M).

As shown in FIG. 1, the hooking device (30) has a hook-shaped portion (3) at the lower end on the top of the uppermost article (M) (M) to be packed.
1) the hooking piece (32) located close to the object to be packed
(M) Hook the end of the packaging material (S) covered on the top of (M) and pull this hook (32) so that this end is separated from the object to be packed (M). Drive device (3
3) With the reciprocating motion of the output part of the drive device (33), the hooking piece (32) is actuated to move the hook-shaped part (31) from the inside to the outside of the upper edge of the packaging material (S). . A pulling device (40) is provided so as to correspond to the moving range of the hook-shaped part (31).

This pulling device (40) is shown in FIGS.
As shown in Fig. 5, a rotating arm having a clamp claw (41) for picking up the edge of the packaging material (S) at its tip and reciprocatingly rotating in the range of about 90 degrees.
(42) and a reciprocating drive device (43) for reciprocally driving the rotating arm (42) at a predetermined timing, and the clamp claw (41)
Is equipped with a drive means (44), and this drive means (44)
The operation switches to a clamped state and an unclamped state.

A swing arm (60) that operates so as to traverse the packaging material (S) pulled out by the clamp claw (41) is provided near the pulling device (40). This swing arm (60)
As shown in FIGS. 1 and 5 and 6, a push-down piece (61) that bends at a right angle in the horizontal direction is provided at the tip of the swing arm.
The reciprocating driver (62) reciprocally drives the (60) at a constant angle.

A reel (50) is provided near the movement locus of the push-down piece (61) accompanying the swing of the swing arm (60). As shown in FIG. 7, the reel (50) includes a first flange (52) having a winding shaft (51) and a second flange (52) arranged so as to face the first flange (52). Five
3), the first flange (52) is rotationally driven, and the second flange (53) is moved to the second flange at a predetermined timing.
And a drive control device (54) for moving the flange (52) forward and backward.

The pulling device (40), the reel (50), and
The arrangement positions of the swing arms (60) are set as shown in FIGS. The clamp claw (41) is a packaging material near the center of one side of the top of the stacked objects (M) (M).
The initial position where the edge of (S) is picked up (the position shown by the solid line in Fig. 5),
It is moved between this initial position and the final position (the position indicated by the broken line in FIG. 5) which is rotated 90 degrees in the horizontal direction. At this final position, a certain range near the upper side of the packaging material (S) is clamped (41).
It will be pulled out by. In this state, the push-down piece (61) of the swing arm (60) in the initial position is located in the intermediate portion between the clamp claw (41) and the object to be packed (M), and the swing arm (60) is then moved to the intermediate position. When the (60) is rotated clockwise in FIGS. 1 and 6, the pressing piece (61) of the packaging material (S) pinched by the clamp claw (41) at the final position (S ₁ ) The opening edge portion (S ₁ ) is hooked and pulled to the opposite side of the clamp claw (41). The packaging material thus stretched (S)
The reel (50) is arranged in the middle of the unsealed edge portion (S ₁ ) (see FIGS. 6 and 7).

Next, the actual unpacking operation by the unpacking device will be described below. As shown in FIGS.
The objects to be packed (M) (M), which are integrally packed by the packing material (S), are placed on the rotary table (T) together with the pallet (P), and the unsealing operation is executed in this state. In this state, the lifting platform (23) is positioned at the bottom dead center, and the floating device (10) is brought closer to the object to be packed (M) side. Specifically, as shown in FIG. 2, the urging means (27)
As shown in the figure, the air cylinder is driven positively to bring the guide roll (12) of the floating device (10) into contact with the lower end of the lowermost article (M), and in this state, the article (M) ( Insert the lower edge of the packaging material (S) surrounded by M) between the clamp rollers (11) (11).

In this state, the heater as the cutting means (19) is turned on and the lifting device (20) is moved up. As a result, the lower end of the packaging material (S) is inserted between the clamp rollers (11) (11) of the pair of roller devices (R) (R). Then, the floating device (10) rises with the cutting means (19) positioned in the middle of the pair of sandwiched portions of the packaging material (S) sandwiched by the clamp rollers (11) (11). . As a result, the unsealed edge (S ₁ ) of the packaging material (S) cut by the cutting means (19) is fed between the clamp rollers (11) (11) with the ascending operation. In particular, in this product, the guide roller (12) contacts the article to be packed (M), and one clamp roller (1
1) makes rolling contact.

Therefore, as the floating device (10) rises, the clamp roller (11) (11) holds the unsealed edge (S) sandwiched therebetween.
₁ ) is fed downward, and the open end edges (S ₁ ) (S ₁ ) on both sides of the cut portion of the packaging material (S) are smoothly fed between the clamp rollers (11) (11). . Incidentally, the roller device
The bearing plate (26) supporting the clamp roller (11) (11) and the guide roller (12) of the (R) is located inside the roller device (R) (R), and the bearing plate (26) is ), The notch (26) opened upward between the clamp roller (11) and (11).
1) is provided, the bearing plate (26) does not become an obstacle when the unsealed edge (S ₁ ) (S ₁ ) is introduced between the clamp rollers (11) (11). .

By the above-mentioned operation, the packaging material (S) is vertically cut at the substantially middle portion of the side surface of the article to be packaged (M) to proceed with the unsealing work. At this time, for example, as shown in FIG. , If the upper object to be packed (M) is displaced toward the lifting device (20), the guide rollers (12) will contact the object to be packed (M) when the lift table (23) rises. The clamp roller (11) on the back side of the packaging material (S) is in transmission with the guide roller (12),
Moreover, since the clamp roller (11) is not in contact with the article to be packed (M), the unsealed edge (S ₁ ) (S ₁ ) smoothly moves between the clamp rollers (11) (11). Will be sent. In addition, the gap between the unsealing edge (S ₁ ) inserted between the clamp rollers (11) (11) and the object to be packed (M) is such that the back side of the clamp roller (11) and the guide roller that comes into contact with it. Dimension determined by (12) (guide roller (12) and item to be packed)
(M) and the contact point between the clamp roller (11) and the packaging material (S): the landing interval). It is almost constant.

When the floating device (10) reaches the top of the stacked objects (M) (M) by the above procedure, the range from the lower end to the upper end of the packaging material (S) becomes vertically divided. It will be opened. In this opened state, the hooking piece (32) is horizontally operated along a predetermined path, and the hook-shaped part (31) is used to wrap the packing material.
Place the upper edge of (S) along the top surface of the topmost item (M) to be packed and pull it outward in the horizontal direction. The upper end of the unsealed edge (S ₁ ) pulled out in this way is the turning arm in the initial position.
It is held by the operation of the drive means (44) of (42) and the clamp claw (41).

Before the cutting and unsealing of the packaging material (S) by the floating device (10) is started, the upper edge of the packaging material (S) may be pulled out by the hook portion (31). The upper end may be pulled out in the middle of cutting and opening.
In these cases, assuming that the timing for holding the pulled-out opening edge (S ₁ ) by the rotating arm (42) is before completion of the cutting and opening, the opening edge by the rotating arm (42) (S ₁ )
Will be held more reliably.

A rotating arm holding the unsealed edge (S ₁ )
(42) is rotated to the final position by the reciprocating drive device (43). As a result, as shown in FIG. 6, the packaging material (S) wound around the objects to be packed (M) (M) is unwound. Items to be packed
Since (M) and (M) are placed on the rotary table (T) together with the pallet (P), the rotary table (T) rotates and the packaging material
(S) is held (or pinched) by the clamp claws (41), and a certain range from the upper end of the opening edge (S ₁ ) is the object to be packed.
It is in a stretched state from (M).

After that, the swing arm (60) in the initial position is swung to the final position by the reciprocating drive (62), and the swing arm (60) is moved.
It is moved to the opposite side of the clamp claw (41) at the final position by the push-down piece (61) at the tip of (60). Thereby, the stretched end of the unsealed edge (S ₁ ) and the object to be packed (M)
As shown by the imaginary line in Fig. 6, the wrapping material (S) between and is further stretched into two folds. In this state, as shown in Fig. 7, a part of the wrapping material (S) is Reel (50)
Matches

Since the winding shaft (51) of the reel (50) is separated from the second flange (53), a part of the packaging material (S) is a part of the winding shaft (51) and the second flange. It is located between (53) and the winding shaft by the operation of the drive control device (54) in this state.
(51) is advanced, and as shown by the broken line in FIG. 7, the wrapping material is provided between the winding shaft (51) and the second flange (53).
Clamp a part of (S).

Next, the driving means (44) is turned "off" to bring the clamp claw (41) into an unclamped state, and the opening edge (S ₁ )
Open one end of. Drive controller in response to this (54)
The first flange (52) is rotationally driven by the operation of. As a result, the packaging material (S) partially clamped by the winding shaft (51) and the second flange (53) is wound around the reel (50).

At this time, since the pallet (P) on which the objects to be packed (M) (M) are placed is placed on the rotary table (T), the wrapping material (S) is rotated while the rotary table (T) rotates. Is the item to be packed (M)
Unwound around (M). Also, already the packaging material (S)
Since the package is opened, the packaging material (S) surrounding the objects to be packaged (M) (M) becomes a state like a thick string or band, and as shown in FIG. ). The packaging material between the clamp claw (41) and the reel (50).
Part of (S) is also wound up at the same time.

As described above, in the device of this embodiment, the packing material (M) (M) in a stacked state is surrounded by the packing material (S), and After the packaging material (S) is opened in a vertically divided state, the work of winding the packaging material (S) in the opened state onto the reel (50) can be performed smoothly. In the above-mentioned embodiment, the packaging material (S) is pulled out from the opening end edge (S ₁ ) side by the pulling device (40), and is further folded in two by the rotating arm (60). (S) was pulled out and wound by the reel (50), but the wrapping material (S) was unwound from the opening edge (S ₁ ) side by the pulling device (40), and The two flanges (53) and the winding shaft (51) may be used for clamping.

Further, in the above embodiment, the first flange (52) and the winding shaft (51) are integrated into the second flange (53).
The winding shaft (51) is opened and closed by advancing and retracting with respect to, but instead of this, a reel (50) including only the first flange (52) and the winding shaft (51), Winding shaft (5
1) may include a pair of arms that can be opened and closed, and the arms may be configured to be opened and closed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an entire unsealing device according to an embodiment of the present invention.

FIG. 2 is a detailed view of the relationship between the cutting means (19) and the floating device (10), showing the initial state of the opening operation.

[Fig. 3] Detailed view of the floating device (10) and the roller device (R).

[Fig. 4] Items to be packed (M) and rotating table (T) during unpacking
And explanatory diagram of the relationship with the landing gear (10)

FIG. 5: Hooking device (30), tensioning device (40), and swing arm
Illustration of the relationship of (60)

FIG. 6 is an explanatory view showing the procedure of winding the unwrapped packaging material (S) onto the reel (50), showing the relationship between the tension device (40), the swing arm (60), and the reel (50). Explanatory diagram

FIG. 7 is a detailed plan view of the reel (50) and is an explanatory view of a procedure of winding the stretched unsealing edge portion (S ₁ ).

FIG. 8 is a cross-sectional view of the reel (50) which is winding the unsealed edge (S ₁ ).

FIG. 9 is an explanatory view of a packed state using a stretch film, which is an explanatory view of an outline of a conventional opening process.

FIG. 10 is a detailed perspective view of a conventional opening operation.

[Explanation of symbols]

(M) ・ ・ ・ Item to be packed (S) ・ ・ ・ Packing material (S ₁ ) ・ ・ ・ Open edge (S ₁ ) (50) ・ ・ ・ Reel (51) ・ ・ ・ Winding shaft

Claims (3)

[Claims] 1. A packaging body in which a packaging material (S) made of a synthetic resin sheet or a film is wrapped around the packaging material (M), and the packaging material (S) is cut and unsealed to open the packaging object (M). In the method of separating and collecting from the
A step of cutting and unsealing the packaging material (S), a step of clamping and pulling out the unsealed end edge (S ₁ ) of the packaging material (S) by the cutting and unsealing and entwining with the reel (50), and the reel ( Five
Packaging material unwound from the object to be packed (M) by rotating (0)
A method of collecting packaging material, which comprises the step of winding (S). 2. The winding shaft (51) of the reel (50) is openable and closable between an open state in which the packaging material (S) is opened and a closed state in which the packaging material (S) is clamped, Clamp the unsealed edge (S ₁ ) and pull it out as well as the reel (5
The step of entwining with (0), the withdrawal step of withdrawing the unsealed edge portion (S) to the portion of the winding shaft (51) in the open state, and the winding shaft (51) after the withdrawing step. The packaging material collecting method according to claim 1, further comprising the step of bringing the reel (50) into a closed state and then rotating the reel (50). 3. The reel (50) has a first flange on one side.
The winding shaft (51) connected to the (52) is connected to the other second flange (5
It can move back and forth in the axial direction with respect to 3), and the winding shaft (51)
In the open state retracted from the second flange (53), between the winding shaft (51) and the second flange (53), the unsealed edge (S ₁ ).
And then the winding shaft (51) is advanced with the pulling-out stopped to sandwich the opening end edge (S ₁ ) between the winding shaft (51) and the second flange (53). Claim 2
The packaging material collection method described in.