JPH0444918A - 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 are constituted of shaking driving arms and roller supporting arms which are connected to the shaking driving arms to be relatively shakable, and are energized in the object to be packaged holding direction. CONSTITUTION:A wrapping tool 4 consists of first through fourth wrapping tools 18, 19, 20, 21 which are radially arranged. Respective wrapping tools 18, 19, 20, 21 consist of a swinging driving arm 24 which is driven by a shaking motor 23, a roller supporting arm 34 which is axially supported to be relatively swingable at the tip of the swinging driving arm 24 and packaging roller 28 at the tip of the roller supporting arm 34, which folds one side end of a packaging sheet and brings the packaging sheet into contact with the outer peripheral surface of an object C to be packaged to wrap the object C. The roller supporting arm 34 is energized by an energizing spring 29 in the object C holding direction, and at the same time, the title packaging device has a structure which easily follows the variation in shape of the object C by elastic deformation force.

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 structure according to the present invention is that a receiving stand for receiving and supporting the packaged object is provided, a packaging sheet is placed on the receiving stand, and the packaged object placed on the receiving stand with the packaging sheet in between is placed on the receiving stand. A packaged object holding mechanism is provided to be fixed on the receiving stand, and one end of each side edge of the packaging sheet is folded over the outer peripheral surface of the packaged object fixed by the packaged object holding mechanism. A working posture in which each of the one side ends is folded over each other and maintains the folded state, and a non-working posture in which the other one side end is folded over the above and retired to a standby position. A plurality of wrapping tools are provided corresponding to each one side end of the packaging sheet, and each wrapping tool is connected to a swinging drive arm so as to be able to swing relative to the swinging drive arm. and a roller support arm biased in the direction of holding down the object to be packaged, and the roller support arm is provided with a packaging roller for folding each one side end of the packaging sheet over the object to be packaged. At the point.

C action] In other words, when the swinging drive arm is rotated in one direction with the packaging roller acting on the corresponding one side end of the packaging sheet, the roller support arm connected to this swinging drive arm moves. As the roller support arm moves, the one end is folded back by the packaging roller, and the central part of the packaging sheet is brought into contact with the object to be packaged. The wrapping roller follows the surface of the object to be packaged using its biasing force toward the object, and sequentially covers the center side of the packaging sheet in a tight state, and then presses the surface of the object to be packaged. When the one side edge folded back by the wrapping roller is folded over, the swing drive arm is stopped and the one side edges are pressed together by the wrapping roller to maintain this state.

This state is the operating posture state of the wrapping tool. Then, when the next one side end is folded back and folded over the other side end, the wrapper is retired and switched to the non-operating position.

As described above, in this wrapping device, the roller support arm is connected to the swing drive arm so as to be able to swing relative to it so as to cover the packaging sheet while contacting and pressing the surface of the packaged object. Moreover, since the packaging roller is biased in the direction of pressing the object to be packaged, the packaging sheet can be placed tightly over the object to be packaged. Furthermore, since the packaging roller acts directly on the packaging sheet and moves on the surface of the item to be packaged, it will not penetrate deeply into the packaging sheet and cause damage or damage the surface of the item to be packaged.

Furthermore, as mentioned above, the close-covering action by the packaging roller is performed at each end of the packaging sheet, so that the above-mentioned close-covering action can be performed on substantially the entire spherical object to be packaged. Become.

[Effects of the invention] Even when packaging items such as lettuce that are easily damaged, such as packaging sheets, and whose shape, size, etc. are not consistent, the packaging sheet is not damaged and the items to be packaged are not damaged.
We have now been able to provide a device that can automatically package while maintaining its aesthetic appearance.

In addition, it is conceivable to construct the preceding wrapping device with a thin elastic plate to achieve the same effect, but the tip of the elastic plate may pierce objects of different sizes and cause damage. However, in the present invention, such a problem does not occur because the rollers are all roller type.

〔Example〕

As shown in FIG. 1O, the packaging device (A) includes a packaging workbench (1), and a packaged object holding mechanism (2) and a receiver provided at the packaging work position on the packaging workbench (1). Wrapping device (B) consisting of stand (3), wrapping tool (4), etc.
) 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. Further, although an adhesive tape is used as the adhesive fixing means, a simple adhesive may be used.

Next, the wrapping device (B) including the packaged object holding mechanism (2), receiving stand (3), wrapping device (4), etc. will be explained. As shown in FIGS. 3 to 6, the holding mechanism (
In 2), a first moving member (10) and a second moving member (11) are fitted onto a vertical sliding shaft (9) that also serves as a support so that they can move up and down, and both (10) and (11) are A compression spring (12) is interposed between them to maintain a constant distance.

A receiving stand (3) for receiving the packaged object (C) is provided at the upper end of the sliding shaft (9), and this receiving stand (3) is provided with arm portions (3a) projecting in all directions.

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 (28) is pivotally connected to the arm (13) via the link (14), and as the arm (13) slides upward, the packaged object ( C) is held by the holding arm (2A). The holding member (2A) has a shape in which the width of the distal end becomes wider in plan view along the outer circumferential surface of the packaged object (C) from the proximal end pivotally supported by the arm (3a) to the distal end. It is. Therefore, the object to be packaged (C) can be fixed and held well.

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 crank arm (16) that is driven to swing up and down is linked, and this crank arm (16) is attached to the output shaft of a drive motor (17) that rotates forward and backward within a certain range, and the second
It is configured to move the moving member (11) up and down. Therefore, from the open state of the holding arm (2A), the second
When the moving member (11) is moved upward, the first moving member (10) is first moved by the pressing force of the compression spring (12).
push up. 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 rim switch for controlling the motor.

Next, the wrapper (4) will be explained. As shown in FIGS. 1, 2, and 7, this wrapper (4) includes 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) and (21) have substantially the same configuration, and are configured as follows. In other words, the swing drive arm (24) driven by the swing motor (23) and the swing drive arm (
A roller support arm (34) is rotatably supported at the tip of the roller support arm (34), and one side end of the packaging sheet (5) is folded over the tip of the roller support output (34) to wrap the object (C). It consists of a packaging roller (28) that is brought into contact with and covers the outer peripheral surface. The roller support arm (34) is biased by a biasing spring (29).
) to urge the packaged item (C) in the direction of holding it down, and the elastic deformation force makes it easy to follow changes in the shape of the packaged item (C). That is, the roller support arm (34) has a base end (34a) and a distal end (34b) that are pivotally supported, and the packaging roller (28) is brought into contact with the outer circumferential surface of the object to be packaged at the pivotally supported portion. A pressing spring (29) 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. Wrapping rollers (28) 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 sheets (5) are attached to both sides of the sheet presser (44) so as to be rotatable as one unit.
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 rotation support shaft (43), and the helical locking arm (45) and the roller support arm (34) are locked so as to be hugged from both sides. * (46)
is externally fitted onto the boss portion (42). With this configuration, one side end of the packaging sheet (5) is held down by the sheet presser (44) during the wrapping operation, and even if it gets caught in the third wrapping tool (20) during the retraction operation, it can be elastically retreated. Become.

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 FIGS. 10 and 11, a conveyance chain (41) that conveys the packaging sheets (5) from the storage box (37) in which the packaging sheets (5) are stacked and stored to the packaging work position;
(41) are placed on the left and right, and this conveyor chain (
41) Chain link with transport portal frame (39)
is concatenated. The conveyance portal frame (39) has a packaging sheet (5) for adsorption on the left and right sides, a nozzle (38),
(38) is mounted so as to be able to move 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, a packaging work table (1
), the fourth wrapping tool (2
1) is equipped with a tape support (48).

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.

(2) Next, the packaging sheet (5) is taken out from the storage box (37), conveyed, and placed in a predetermined position. Then, the adhesive tape (6) can be attached to the last folded part of the packaging sheet (5) (5d).

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.

■ Then, the receiving stand (3) of the packaged object holding mechanism (2)
) Place the item to be packaged (C) on top. This step with the feet is the first step.
This is the state shown in (a) in Figure 2.

(2) As shown in FIG. 12(U), 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 (53) of the packaging sheet (5) is folded back onto the top surface of the object to be packaged (C), and the first wrapping tool (18) is folded back.
The pressing state of the packaging roller (28) is maintained.

■ As shown in Figure 12 (=), the second
The wrapping tool (19) is operated to overlap the corresponding one side ends (5b) of the packaging sheet (5) 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 wrapping tool (18) and the second wrapping tool (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. ) returns to the standby position.

At this time, the second wrapping tool (19) has one end (5b) held down by the plate-shaped sheet presser (44), 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 (+7), the fourth wrapping tool (21) folds back the one 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).

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 FIG.
FIG. 2 is a diagram showing the operating state of the wrapper, FIGS. 3 to 5 are diagrams showing the operating state of the holding mechanism, FIG. 6 is a perspective view of the holding mechanism, FIG. 7 is a plan view, and FIG. The figure is a sectional view of the second wrapping device, FIG. 9 is a side view of the second wrapping device, FIG. 10 is an overall side view, FIG. 11 is a diagram showing the operation of the sheet feeding device,
The figure shows the packaging procedure. (2)...Retention mechanism, (3)...
Receiving stand, (5)... Packaging sheet, (18)
, (19), (20), (21)...
・Wrapping tool, (24)... Drive arm, (28
)...Packaging roller, (34)...Roller support arm, (44)...Sheet presser, (
C)... Item to be packaged.

Claims (1)

[Claims] 1. A receiving stand (3) for receiving and supporting the packaged object (C).
) and place the packaging sheet (5) on this receiving stand (3).
a packaged object holding mechanism (2) for fixing the packaged object (C) placed on the receiving stand (3) with the packaging sheet (5) therebetween, on the receiving stand (3);
), and the packaging sheet (
5) an operating posture in which one of the side edges is folded over and the folded state is maintained at the folded position of each of the one side edges, and the other one side edge is overlapped on the one side; A plurality of wrapping tools (18), (19), (20), and (21) which are switched to a non-working position in which they are retracted to a standby position in a state where they are The wrapping tools (18), (19), (20), (21) are provided correspondingly to the following.
Swing drive arm (24) and this swing drive arm (24)
and a roller support arm (34) which is connected so as to be swingable relative to the packaged object (C) and is biased in the direction of pressing the packaged object (C), and the packaging sheet (5) is connected to the roller support arm (34). A packaging device is provided with a packaging roller (28) that folds each one side end of the packaging roller (28) to cover the packaged item (C). 2. A sheet presser (44) that is neutrally elastically biased toward a predetermined standby posture is attached to a location near the packaging roller (28) of the roller support arm (34) of any one of the wrapping tools (19). The packaging device according to claim 1, wherein the packaging device is rotatably mounted.