JPH0444919A - Packaging device - Google Patents

Abstract

PURPOSE:To make the packaging finish favorable and improve the work efficiency by a method wherein a plurality of wrapping tools, which are switched between an operation posture by which each side end of a packaging sheet is folded and placed over an object to be packaged and held under a lapped condition, and a non-operation posture in which the wrapping tool retreats to the stand-by position, are provided to correspond with respective sides of the sheet. CONSTITUTION:By operating a first wrapping tool 18, one side end 5a of a packaging sheet 5 is folded on the upper surface of an object C to be packaged, and the holding condition of a packaging roller 28 of the first wrapping tool 18 is maintained. By operating a second wrapping tool 19 located at a diagonally opposite side from the first wrapping tool 18, one side end 5b corresponding to the packaging sheet 5 is placed over the first side end. When the side end 5b has been placed, the first wrapping tool 18 returns to a stand-by position. By operating a third wrapping tool 20, when a remaining side end 5c has been placed, the second wrapping tool 19 returns to a stand-by position. One side end 5d on which an adhesive tape 6 is attached is folded and placed on the object C by a fourth wrapping tool 21, and respective side ends 5a, 5b, 5c, 5d lapped in four layers are mutually joined.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a packaging device for wrapping an object to be packaged, typified by spherical vegetables such as lettuce, in a packaging sheet.

[Conventional technology]

A possible method for packaging this kind of spherical vegetables, etc. is to place the item to be packaged on a spread packaging sheet, and fold each one side end of the peripheral edge of the packaging sheet. There are products that are concentrated in one place, heat-welded, and hermetically packaged.

[Problem to be solved by the invention]

If the packaging is simply sealed by heat welding, the finish of the heat welded parts cannot be described as aesthetically pleasing.In order to achieve aesthetically pleasing packaging, it is necessary to It is necessary to sequentially fold the package over the outer circumferential surface of the packaged item and fix each folded end on one side, and this process was performed manually.

However, manual work has low work efficiency and is an obstacle to cost reduction, so there remains room for further improvement.

SUMMARY OF THE INVENTION An object of the present invention is to provide a packaging sheet that provides a good packaging finish, improves work efficiency, and improves the degree of adhesion of a packaging sheet to an object to be packaged.

[Means to solve the problem]

The characteristic configuration according to the present invention is that a packaging sheet that wraps around an object to be packaged is placed on a packaging workbench in an unfolded state, and each side edge of the packaging sheet is folded back to cover the object to be packaged; A working posture in which it is folded over the other one side end of the peripheral edge part that was previously folded and covered and the folded state is maintained, and the next one side end is superimposed on the one side edge of the peripheral edge part. A plurality of wrapping tools are provided corresponding to each one side end of the packaging sheet, and the packaging sheet is placed spread out on the packaging workbench, and a plurality of wrapping devices are provided corresponding to one end of each side of the packaging sheet. A holding means is provided for temporarily holding and fixing at least two diagonally opposite side ends of the packaging workbench to the packaging workbench.

[For production]

After placing the item to be packaged from above the packaging sheet spread out on the packaging workbench, each wrapping tool sequentially switches from the standby position to the working position, and the packaging tool that has been placed on the packaging sheet before Fold the one side edge folded back by the wrapper over the side edge, and press the one side edge together. In this way, the items to be packaged are sequentially wrapped in the packaging sheet.

At this time, the packaging sheet before the item to be packaged is placed on it is given tension by the holding means and is set in a wrinkle-free state, so even after the wrapping operation by each wrapping device as described above, This results in packaging with good adhesion and no wrinkles.

〔Effect of the invention〕

It has now become possible to provide a device that can automatically wrap items such as lettuce, which are easily damaged and have inconsistent shapes and sizes, such as packaging sheets, while maintaining their aesthetic appearance.

[Example] As shown in FIG. 10, the packaging device (A) includes a packaging workbench (1) and a packaged object holding mechanism ( 2) A wrapping device (B) consisting of a stopper (3), a wrapping tool (4)
) and a packaging sheet (5) placed at the packaging work position.
an adhesive fixing means supplying device (7) for applying the adhesive fixing means (6) to the
), and a packaging sheet supply device (8) that automatically supplies the packaging sheet (5) in a spread state to the packaging work position. Here, the object to be packaged (C) is spherical vegetables such as lettuce, but it may be of other shapes. Furthermore, although an adhesive tape is used as the adhesive fixing means, it may be simply an adhesive.

Next, the wrapping device (B) including the packaged object holding mechanism (2), the catch and stopper stand (3), and the wrapping tool (4) will be explained. As shown in FIGS. 1 to 4, the holding mechanism (
In 2), the first moving member (10) and the second moving member (11) are fitted onto the vertical PJ driving wheel (9) which also serves as a support so that they can move up and down, and the space between the two (10) and (11) is A compression spring (12) is interposed between the two to maintain a constant spacing. A stopper stand (3) is provided at the upper end of the sliding shaft (9) to receive and hold the object to be packaged (C).
Arms (3a) projecting in all directions are provided.

On the other hand, the arm portion (
3a), with two arms (13) extending in opposite directions, and a holding arm (2A) pivotally supported on the tip of the arm portion (3a) so as to be able to swing vertically; The arm (2^) is pivotally connected to the arm (13) via the link (14), and as the arm (13) slides upward, the receiver is moved to the packaged object placed on the stopper (3). The object (C) is held by the holding arm (2A). The holding member (2A) is pivotally supported by the arm (3a).
It has an arcuate shape in side view along the outer peripheral surface of the packaged object (C) from the end to the tip, and the width of the tip increases in plan view. Therefore, the packaged object (C
) has good fixation retention.

One end of a scale-type drive arm (15) that swings up and down is linked to the side surface of the second moving member (11), and the scale-type drive arm (15) is connected to the other end of the scale-type drive arm (15). , a swinging member (16) which is driven to swing up and down via a push/pull link (15a) is linked to the swinging member (16).
) is attached to the output shaft of a drive motor (17) that rotates forward and backward within a certain range, and is configured to move the second moving member (11) up and down. Therefore, the holding arm (2A)
When the second moving member (11) is moved upward from the open state, the first moving member (lO) is first pushed up by the pressing force of the compression spring (2). Then, the holding arm (13) rises and swings to hold the lower half of the packaged object (C). Note that (SW) in the figure is a limit switch for controlling the motor.

Next, the wrapper (4) will be explained. As shown in FIGS. 5 to 7, the wrappers (4) are first to fourth wrappers (18) arranged radially.

It consists of (19), (20), and (21).

Each wrapping tool (18) other than the second wrapping tool (19),
(20).

(21) has approximately the same configuration, and is configured as follows. In other words, there is a swing drive arm (24) driven by a swing motor (23), and a roller support arm (3) that is pivotally supported at the tip of the swing drive arm (24) so as to be relatively swingable.
4), and a packaging roller (28) that folds one side end of the packaging sheet (5) over the tip of the roller support arm (34) so as to contact and cover the outer peripheral surface of the item to be packaged (C). .

The roller support arm (34) is biased in a direction to press down the packaged item (C) by a biasing spring (29), and the elastic deformation force allows the roller support arm (34) to easily follow changes in the shape of the packaged item (C). It becomes. That is, the roller support arm (3
4) is made up of a base end (34a) and a distal end (34b) that are pivotally supported, and a biasing spring (29) that presses the packaging roller (28) against the outer circumferential surface of the packaged object. ) is provided. A guide roller (30) is pivotally supported at the rear end of the roller support arm (34), and the guide roller (30) is guided in contact with the cam (31) as the swing motor (23) is driven. A packaging roller (28) is placed along the outer surface of the packaging sheet (5).
) is configured to move.

Next, the second wrapping tool (19) will be explained.

As shown in Figures 8 and 9, the roller support arm (3
4) The rotation support shaft (43) is fitted into the tip boss portion (42) so as to be relatively rotatable, and the plate-shaped sheet presser (44) is attached to the middle part of the rotation support shaft (43). The packaging sheet (5) is attached to both sides of the sheet presser (44) so as to be movable in one piece.
The packaging rollers (28) and (28) for guiding the packaging rollers (28) are loosely fitted onto the outside. The sheet holding device (44) is neutrally elastically biased toward a predetermined standby posture. In other words, the locking arm (45) is fixed to one end of the pivot shaft (43), and the locking arm (45) and the roller support arm (34) are held together from both sides 6. Wrapped spring (46)
is externally fitted onto the boss portion (42). With this configuration, one side end of the wrapping sheet L-(5) is pressed down by the sheet holding odor (44) during the wrapping operation, and even if it gets caught in the third wrapper (20) during the retraction operation, it can be elastically retreated. becomes.

Next, the supply mechanism (36) that feeds the packaging sheet (5) to a predetermined position on the packaging workbench (1) will be explained.

As shown in Figures 10 and 11, the packaging sheet (5)
a conveyance chain (41) that conveys the packaging sheet (5) from the storage box (37) in which the sheets are stored in layers to the packaging work position;
, (41) are arranged on the left and right, and a transport portal frame (39) is attached to the chain link of this transport chain (41).
) is concatenated. The transport portal frame (39) has a packaging sheet (5), a suction nozzle (38) on the left and right sides,
(38) is mounted so as to be movable up and down, and as shown in FIG. The structure is such that the packaging sheet (5) is fed out to the packaging work position as the transport portal frame (39) moves.

In addition, there is a packaging work table (1) on the outside of the third wrapped odor (20).
) A holding roller (47) is provided as a holding means for temporarily holding one end of the packaging sheet (5) spread on the packaging sheet (5). The unrolled packaging sheet (5) that is fed onto the packaging workbench (1) by the feeding and feeding device (8) is fixed to the holding roller (47) and the other holding means located diagonally therewith. It is fed out from the means supplying device (7) and adhered to the adhesive tape (6) which is fixed by suction, so that the diagonal position is maintained and tension is applied.

Next, the drive structure of the holding roller (47) will be explained. As shown in FIGS. 1, 3, and 4, the holding roller (47) protrudes above the workbench (1) to hold down the packaging sheet (5), and the holding roller (47) has an operating position in which the holding roller (47) protrudes above the workbench (1) and presses the packaging sheet (5). The swinging support member (
48), and this swing support member (48) is configured to be driven by a motor (17) for driving the holding arm (13) of the packaged object holding mechanism (2). In other words, the rotating member (
16) and the push/pull link (15a) are connected through an elongated hole (51). Further, the second drive pin (52) and the swing support member (48) are interlocked and connected via the rod (53), and the second drive pin (
52) and the rod (53) are pivotally connected, and the swing support member (48) and the rod (53) are linked via the elongated hole (54). The swing support member (48) is urged to a non-operating position by a trouble spring (55), and the stopper (5
6) holds the position.

Next, these operations will be explained. Packaging workbench (1
), after the packaging sheet (5) is fed out, the drive motor (17) is driven from the standby state shown in Fig. 3, and while it rotates approximately 90 degrees (until the position shown in Fig. 4). Long hole (51)
Due to the flexibility, the packaged object holding mechanism (2) does not operate, and only the holding roller (47) is switched to the operating position. This holding roller (47) holds down the packaging sheet (5) with the urging force of the trouble spring (55). During further rotation of about 90 degrees from the state shown in Fig. 4 (until the position shown in Fig. 1), the holding roller (47) maintains the sheet pressing operation, and the packaged object holding mechanism (2) operates. Thereafter, the motor (17) rotates in the reverse direction and returns to the standby state.

The working form based on the above-mentioned configuration will be explained based on FIG. 12.

■ Pay out the adhesive tape (6) to the specified position.

■ Next, take out the packaging sheet (5) from the storage box (37), transport it, and place it in a predetermined position ii! place Then, the adhesive tape (6) can be attached to the last folded end (5d) of the packaging sheet (5).

At this time, the adhesive tape (6) is suctioned and fixed by the supply device (7), and the packaging sheet (5) is given tension by the suctioned and fixed adhesive tape (6) and the holding roller (47). set to state.

■ The receiver of the packaged object holding mechanism (2) is the stopper (3).
) Place the item to be packaged (C) on top. The steps up to this point are the first
This is the state shown in (a) in Figure 2.

(2) As shown in FIG. 12 (CU), next, the packaged object holding mechanism (2) is operated to hold the packaged object (C).

■ As shown in Figure 12 (c), the first wrapping tool (18)
is activated, one end (5a) of the packaging sheet (5) is folded back onto the top surface of the item to be packaged (C), and the first packaging tool (1 day) is folded back.
The pressing state of the packaging roller (28) is maintained.

■ As shown in Figure 12 (d), the second
The wrapper (19) is activated and the corresponding ends (5b) of the packaging sheet (5) are overlapped from above.

As shown in FIG. 12(N), when the one side end (5b) is overlaid, the first wrapper (18) returns to the standby position.

At this time, the first packaging tool (18) and the second packaging odor (19)
The packaging rollers (28) and (28) of the packaging rollers (28) are brought into a butting state, but the program is controlled so that they are driven at different timings for a predetermined period of time.

Next, one end (5c) is placed along the outer peripheral surface of the packaged item (C).
Before the third wrapping device (20) is activated, air is blown toward the folded portion so as to cover the portion (5d) without swelling.

■ Subsequently, as shown in FIGS. 12(f) and ()), the third wrapper (20) is activated and when the remaining one side edge (5c) is overlaid, the second wrapper (19) is activated. ) returns to the standby position.

At this time, the second wrapping odor (19) is held by the plate-shaped sheet holding tool (44) at one end (5b), so that the wrapping operation of the third wrapping tool (20) is inhibited. Moreover, when the second wrapping device (19) is retracted, the third wrapping device (2
0), it can be avoided by elastically retreating.

■Furthermore, as shown in FIGS. 12 (H) and (!F), the fourth wrapper (21) folds back the end (5d) to which the adhesive tape (6) is attached and wraps the packaged object (C). and each one side edge (5a) folded in four layers with the adhesive tape (6).
), (5b), (5c), (5d).

The holding means may hold the four corners of the packaging sheet (5).

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the packaging device according to the present invention, and FIGS. 1, 3, and 4 are side views showing the operating state of the holding mechanism and the holding roller, and FIG. 2 is a perspective view of the holding mechanism, and FIG. Figure 5,
Fig. 6 is a side view showing the action of the wrapping device, Fig. 7 is a plan view, Fig. 8 is a sectional view of the second wrapping device, Fig. 9 is a side view of the second wrapping device, and Fig. 10. 11 is an overall perspective view, FIG. 11 is a side view of the sheet feeding device, and FIG. 12 is a diagram showing the procedure of wrapping operation. (1)...Packaging workbench, (5)...Packaging sheet, (5a), (5b), (5c),
(5d) --One side end, (7), (47) --
... Holding means, (18), ((9), (2)
0), (21)...Wrapping tool, (C)...
...Packaged item.

Claims (1)

[Claims] The packaging sheet (5) that wraps around the object to be packaged (C) is placed on the packaging work table (1) in an unfolded state, and each side edge (5a) at the peripheral edge of the packaging sheet (5),
(5b), (5c), and (5d) are folded back and placed on the object to be packaged (C), and the other side ends (5a), (5b), and (5c) of the peripheral portion that were previously folded and covered are ) and maintain the folded state, and the next one side edge (5b), (5c), ( A plurality of wrapping tools (18), (19), (20), which switch to a non-working position in which the wrapping tools (18), (19), (20), 5d) are superimposed and retire to a standby position;
(21) at each one side end (5a) of the packaging sheet (5).
, (5b), (5c), and (5d), and are spread out and placed on the packaging workbench (1).
) at least two diagonally opposite ends (5c),
A packaging device provided with holding means (7) and (47) for temporarily holding and fixing (5d) on a packaging workbench (1).