JPH0444920A - packaging equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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.

[Prior Art] A conceivable form of packaging this kind of spherical vegetables, etc. is to place the item to be packaged on a spread packaging sheet, and to wrap each side edge of the periphery of the packaging sheet. There are some that are folded and then heat-welded with their one side edges concentrated in one place and hermetically sealed.

[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 This required a process of sequentially folding the package over the outer circumferential surface of the packaged item and fixing 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 package that provides a good packaging finish, improves work efficiency, and improves the degree of adhesion of the packaging seal to the packaged item.

[Means to solve the problem]

The characteristic configuration 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 sandwiched therebetween is placed on the receiving stand. A packaged object holding mechanism is provided to be fixed on the receiving stand, and one of the side edges of the packaging sheet is folded back and covered with the outer peripheral surface of the packaged object fixed by the packaged object holding mechanism. A plurality of packages that switch between a working position in which each side end is kept folded over each other and a non-working position in which the other side end is overlapped on the one side end and retired to a standby position. A wrapping tool is provided corresponding to each one side end of the packaging sheet, and each wrapping tool is connected to the swinging drive arm so as to be swingable relative to the swinging drive arm and biased in the direction of pressing the object to be packaged. a packaging roller formed with a roller support arm and folding each one side end of the roller support arm packaging sheet over the object to be packaged; The present invention is characterized in that a guide mechanism is provided which guides the retracting movement locus so as to bypass the other enclosing devices in the working position.

[For production]

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, and this roller As the 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, and the roller support arm is directed toward the object to be packaged. Using the urging force, the packaging roller follows the surface of the object to be packaged, and sequentially covers the center side of the packaging sheet in a close contact state, and then places the packaging sheet on top of one side edge that was previously covered. When the one side ends folded back by the rollers are folded over, the swing drive arm is stopped and the one side ends 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 bowed back and switched to a 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 packaged item, it does not penetrate deeply into the packaging sheet and cause damage or damage the surface of the packaged item.

Furthermore, as mentioned above, the close-covering action by the packaging roller is performed at each end of each side of the packaging sheet, so that the close-covering action described in ``2'' can be performed over almost the entire spherical object to be packaged. It turns out.

Here, as described above, as a result of wrapping the sheet end portions at a plurality of locations overlapping the object to be packaged,
When the preceding wrapping roller is in the holding state holding the sheet, when the following wrapping roller operates, the above-mentioned guide mechanism causes the preceding wrapping roller to detour around above the following wrapping roller which is in the holding state and retire. Wrapping operation can be continued.

〔Effect of the invention〕

Provides a device that can automatically wrap items such as lettuce, which are easily damaged, such as packaging sheets, and whose shape, size, etc. are not consistent, without damaging the packaging sheet and maintaining its aesthetic appearance. I was able to do it.

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 roller type is used.

[Example] As shown in FIG. 9, the packaging device (A) includes a packaging workbench (1) and a packaged object holding mechanism ( 2)・Catch stand (
3)・Wrapping device (B) consisting of wrapping tool (4) etc.
and an adhesive fixing means supplying device (7) for applying an adhesive fixing means (6) to the packaging sheet (5) placed at the packaging work position.
and a packaging sheet supply bag W (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 other shapes may be used. 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. 4 to 7, the holding mechanism (2) is configured to move a first moving member (10) and a second moving member (11) up and down on a vertical sliding shaft (9) that also serves as a support. They are movably fitted onto the outside, and a compression spring (12) is interposed between the two (10) and (11) 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 protruding arm portions (3a) are provided at opposing locations on the outside of the receiving stand (3). be.

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 (2A) is pivotally connected to the arm (13) via a 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 an arcuate shape in side view along the outer peripheral surface of the packaged object (C) from the base end pivotally supported by the arm part (3a) to the distal end, and has a flat surface. It has a shape in which the width of the tip becomes wider when viewed. 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 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 (I7) that rotates forward and backward within a certain range.
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 glue sinch for motor control.

Next, the wrapper (4) will be explained. As shown in Figures 1 to 3 and Figure 8, this wrapper (4
) are the first to fourth wrapping tools (18) arranged radially.
, (19), (20), and (21). Each wrapping tool (18), (19), (20)
, (21) have substantially the same configuration, and are configured as follows.

In other words, there is a swing drive arm (24) driven by a swing motor (23), and a roller support arm (34) that is pivotally supported at the tip of the swing drive arm (24) so as to be able to swing relative to each other.
) and a packaging roller (28) that folds one end (5C) 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 packaged item (C). Become. 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 biasing spring (29) for pressing is provided.

A guide roller (30) is pivotally supported at the rear end of the roller support arm (34), and this guide roller (30) is guided in contact with the cam (31) according to the drive of the swing motor (23), and the packaging sheet is (5) Along the outer surface of the packaging roller (28)
is configured to move.

Then, the movement trajectory of the wrapping device (19) which operates second, from the sheet pressing action posture to the standby position is 3.
Wrapping roller (28) of the wrapping device (20) that operates th
A guide mechanism (32) is provided to guide the movement around the upper part of the .

In other words, the guide mechanism (32) is connected to the second wrapper (
It consists of a fixed cam (31a) that guides the guide roller (30) of 19) along the wrapping locus and a movable cam (31b) that guides it along the above-mentioned turning locus.

In detail, an arc-shaped fixed cam (31a) is formed on the inner surface of the fixed cam plate (33), and the fixed cam (31
A movable cam member (40) is pivotally supported near the arcuate inner side of a) so that the balance can swing freely around the intermediate horizontal axis (P), and when guided by the fixed cam (31a), the movable cam member (34) ) is oscillated and biased by a spring (35) to a position where it does not act.

When the guide roller (30) reaches near the end of its stroke along the fixed cam (31a), it pushes up and passes the movable cam member (34), which is biased by the spring, against the biasing force, and upon return operation, The movable cam (3) overlaps the fixed cam (31a).
1b) It rides on the starting end and is guided along the movable cam (31b). In this way, the third packaging roller (2
It returns to the standby position while making a detour so as not to disturb the operation of step 8).

Next, place the packaging sheet (5) at the specified position on the packaging workbench (1).
The supply mechanism (36) that feeds out will be explained.

As shown in FIGS. 9 and 10, 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) is placed on the left and right.
A portal frame (39) for transportation is connected to the chain link 1). The transport portal frame (39) has packaging sheets (5), suction nozzles (38), (3) on the left and right sides.
8) descends and adsorbs the packaging sheet (5),
It is configured so that the packaging sheet (5) can be lifted as it is and fed out to the packaging work position as the conveying portal frame (39) is moved.

The working configuration with the above configuration will be explained based on FIG. 11.

■ 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 end (5b) of the packaging sheet (5). At this time, the other end is held by a roller (41).

■ And the receiving stand (3) of the packaged holding mechanism (2)
Place the item to be packaged (C) on top. The steps up to this point are the 11th stage.
This is the state shown in (a) in the figure.

(2) As shown in FIG. 11(B), next, the packaged object holding mechanism (2) is operated to hold the packaged object (C).

■ As shown in Figure 11 (c), the first wrapping tool (18)
is operated to fold back one side end (5a) of the packaging sheet (5) onto the top surface of the object to be packaged (C), and maintain the state in which the first wrapping plate (22) is pressed (see Fig. 2).

■ As shown in Figure 11 (d), the second
The wrapping tool (19) is operated to overlap the corresponding one side edge (5b) of the wrapping sheet (5) from above the wrapping plate (22). As shown in FIG. 11(E), the one side end (
5b), the first wrapper (18) returns to the standby position (see Figure 1).

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.

■ Next, as shown in Figure 11 (f) and (1-),
The third wrapper (20) operates and the remaining one side end (5c)
When the stacking is completed, the second wrapping tool (19) returns to the standby position.

■Furthermore, as shown in FIGS. 11 (H) and (W), the fourth wrapping tool (21) folds back the one side end (5d) to which the adhesive tape (6) is attached and wraps the object to be packaged (C). each one side edge (5a) folded over in four layers with the adhesive tape (6).
, (5b), (5c), and (5d) are pasted together (see Figure 3).

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 to 3 are side views showing the packaging operation state, FIGS. 4 to 6 are side views showing the operation of the holding mechanism, and FIG. 8 is a plan view of the main parts, FIG. 9 is a perspective view of the entire structure, FIG. 10 is a side view showing the operation of the supply mechanism, and FIG. 11 is a view showing the packaging procedure. (2)... Holding mechanism, (3)... Receptacle, (5)... Seat, (18) to (21
)...Wrapping tool, (24)...-drive arm, (28)...Wrapping roller, (34)...
. . . Roller support arm, (32) . . . Guide mechanism, (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) a working posture in which one of the side edges is folded back and covered to maintain a folded state of each of the one side edges, and a state in which the other one side edge is overlapped on the one side edge. A plurality of enclosing devices (1
8), (19), (20), and (21) are provided corresponding to one side edge of the packaging sheet (5), and each wrapping tool (
18), (19), (20), and (21) are connected to the swing drive arm (24) so as to be able to swing relative to each other, and are biased in the direction of pressing the object to be packaged (C). (3
4), each one side end (5a), (5b), (5c) of the roller support arm (34) and the packaging sheet (5),
A wrapping roller (28) is provided for folding back (5d) to cover the object to be packaged (C), and the movement locus of the at least one wrapping tool (19) in which it retires from the working position to the standby position is Other enclosing devices in working position (2
A guide mechanism (32) that guides movement to bypass the upper part of
) packaging equipment. 2. The guide mechanism (32) is composed of a fixed cam (31a) that guides the wrapping tool (19) along the wrapping locus, and a movable cam (31b) that guides the wrapping tool (19) along the turning locus. The packaging device according to claim 1.