JPH03226418A - Wrapping device - Google Patents

Abstract

PURPOSE:To improve outward appearance of wrapping with swelling at hem parts prevented by providing air-blowing pneumatic tucking means for tucking of both the hem parts of each one of sections of a wrapping sheet that are overlapped or being overlapped one another over a position of the overlapping of an article to be wrapped. CONSTITUTION:As a wrapping sheet 5 is taken out of a sheet case 37 and is placed on a specified position with an adhesive tape 6 unwound to a specified position, the adhesive tape 6 is automatically stuck to a corner 5d of one section of the wrapping sheet 5. An article C to be wrapped is placed on an article receiving table 3, and the article C is held with an article-holding mechanism 2 that is put in operation. Then a first wrapping means 18 is actuated and the corner 5a of one section of the wrapping sheet 5 is bent and is put on the upper face of the article C, and a first wrapping-holding means 22 is kept in holding position. Then a second wrapping means 19 is actuated and a corner 5b of one section of the wrapping sheet is put over the first wrapping-holding means 22, making the first wrapping means 18 return to its waiting position. Four pneumatic tucking means 40 are then actuated and four base parts 5e, 5f are tucked therewith. A third wrapping means 20 is then actuated for putting of a corner 5c of one section of the wrapping sheet, and a fourth wrapping means 21 is actuated for bending of the corner 5d and putting the same over the article C. Overlaid corners 5a-5d are then stuck one after another with the adhesive tape 6.

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, such as lettuce, in a packaging sheet.

[Conventional technology]

In this type of packaging device, it is necessary to package the packaged item in a state that enhances its aesthetic appearance compared to a type of packaging device in which each part of the packaged item is gathered together in one place and then thermally welded. , each part of the plurality of peripheral parts of the packaging sheet on which the object to be packaged is placed is folded back to the folding position of the object to be packaged, and the folded state of each part is made using some kind of adhesive means. We have adopted a packaging form that fixes the

[Problem to be solved by the invention]

In this way, in the process of folding each part of the plurality of parts at the peripheral edge of the packaging sheet and folding it over the surface of the object to be packaged, the parts are folded over the surface of the object to be packaged and then folded again. When a part of the standby position that should be folded is folded as it is without any modification and is folded over the other part that was previously folded over the surface of the packaged object, the part that was previously folded over the surface of the packaged object The foot of the mountain in some parts bulges outward, detracting from its aesthetic appearance.

An object of the present invention is to prevent the bulge at the base of the mountain by simply adding a simple mechanism, and to provide a packaging form with enhanced aesthetic appearance, and to provide a mechanism for preventing the bulge at the foot of the mountain in a simple manner. The point is that it provides something that can be configured.

[Means to solve the problem]

The characteristic configuration according to the present invention includes a receiving part that receives and supports a packaged object, and a packaged object holding mechanism that fixes the packaged object placed on a packaging sheet located in the receiving part to the receiving part, A portion of the plurality of peripheral portions of the packaging sheet is folded over the outer circumferential surface of the packaged object fixed by the packaged object holding mechanism, and the folded state is maintained at the folded position of each of the portions. A plurality of wrapping means are provided which can switch between a wrapping means working position and a wrapping means non-working position in which one part is overlapped with another part and the wrapping means is retired to a standby position. In order to fold the hem portion of the portion folded to the stacked position or in the middle of folding toward the other portion that is in a standby state, a gas-type folding mechanism that blows gas to the hem portion is installed in the wrapped portion. It is formed in the object holding mechanism, and its functions and effects are as follows.

[For production]

In other words, when the packaged object is placed on the receiving part via the packaging sheet by some means (including artificially), the packaged object holding mechanism presses the packaging sheet against the packaged object. The object to be packaged is held and fixed to the receiving part. A plurality of wrapping means are sequentially operated with respect to the fixed object to be packaged, so that each of the above-mentioned portions is overlapped at the folded position of the object to be packaged.

During this folding process, the gas blowing mechanism blows gas against the mounting portion, thereby making it possible to bring the packaging sheet into close contact with the surface of the packaged object. Further, during such a wrapping process, the folding mechanism is operated in a wrapping means operating posture in which one wrapping means folds a corresponding portion into the folded position of the object to be packaged and maintains the folded state. blows gas toward the hem of the portion folded in the folded position, folds the stationary portion toward the other portion in the standby state, and operates so as to bring it into close contact with the surface of the packaged item.

Therefore, when the other part in the standby state is then folded back to cover the object to be packaged, the hem part folded in by the folding mechanism does not bulge outward.

〔Effect of the invention〕

As a result, in order to package the product aesthetically, each time one part is folded to the folding position of the packaged object, the hem of the part must be manually folded into the other part that is waiting. It has now become possible to perform packaging with high aesthetic appeal while improving work efficiency.

Moreover, since the folding mechanism for ejecting the gas is provided in the object holding mechanism, the object holding mechanism can also be used as a nozzle section for ejecting the gas.
Compared to the case where a dedicated folding mechanism is provided separately from the packaged object holding mechanism, the number of parts can be reduced by combining the mechanism.

Furthermore, since the gas is ejected from the object holding mechanism that fixes the object, the gas outlet is always at a constant position relative to the surface of the object, which has the advantage of not being affected by individual differences among the objects.

Furthermore, since the structure is such that gas is ejected from the object holding mechanism that comes into contact with the surface of the object to be packaged, the air ejection pressure is high because the packaging sheet and the gas outlet are close to each other. There is no need for it, and the compressor capacity can be made smaller.

〔Example〕.

As shown in FIGS. 3 and 10, the packaging apparatus (A is a packaging workbench (1), and the packaging workbench (L) is a packaging object holding mechanism (2) installed at the packaging work position. - A wrapping device (B) consisting of a receiving stand (3), a wrapping mechanism (4), etc., and an adhesive fixing means (6) for applying an adhesive fixing means (6) to the package 1-(5) placed at the wrapping work position. A supply device (7) and a packaging sheet (5) at the packaging work position.
Packaging sheet feeding device (36
). Here, the object to be packaged (C) may be a spherical vegetable such as lettuce, or may have another shape. Further, although an adhesive tape is used as the adhesive fixing means, a simple adhesive may be used.

Next, the wrapping device (B), such as the packaged object holding mechanism (2), the receiving stand (3), and the wrapping mechanism (4), will be explained. As shown in FIGS. 3 and 6, 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), a compression splitter (12) is interposed between them to maintain a constant interval, thereby forming the holding mechanism (2). 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)
The arms (3a) mainly protrude in all directions on the outer periphery of the disk.
Equipped with On the other hand, the four arms (13) extend radially with respect to the top plate of the first moving member (10) and are located below the arm portion (3a). (13) and the four arms (3a
) are respectively connected by four bending links (14). A holding arm (2A) is pivotally supported at the tip of the arm portion (3a) so as to be able to swing up and down, and the arms (2A) are linked to the refraction links (14), respectively, so that the refraction of the refraction links (14) As it swings, the packaged object (C) placed on the receiving stand (3) is held by the holding arm (2A).
The packaged object (
C) is formed in an arcuate shape when viewed from the side so as to follow the outer circumferential surface of C), and when viewed from above, the width thereof becomes wider at an intermediate portion between the base end and the distal end and gradually increases toward the base end and the distal end. It is formed in a shape that becomes narrower. Therefore, the packaged item (C)
Good fixation and retention.

Further, the tip of the holding arm (2A) is curved outward so that the holding arm (2A)
) The tip is configured to prevent the tip from digging into the outer peripheral surface of the packaged item (C) and damaging it.

One end of a scale-type drive arm (I5) 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 driven by a drive motor (1
7) It is attached to the output shaft and configured to move the second moving member (11) up and down.

Therefore, when the second moving member (11) is moved upward from the state where the holding arm (2A) is opened,
This second moving member (11) is connected to the compression splitter (12).
), and the first moving member (lO) is pushed up by the pressing force. Then, as the bending link (14) bends, the holding arm (2A) rises and swings to hold the lower half of the packaged object (C).

Next, the wrapping mechanism (4) will be explained.

This wrapping mechanism (4) is radially arranged first to fourth wrapping means (1B), (19), (20), (
21). These enclosing means (18), (1
9), (20), and (21) are hereinafter referred to as wrapping tools. As shown in FIG. 3, the first wrapping device (18) is first activated with the holding arm (2A) holding the object (C).

This first wrapping tool (18) folds back a portion (5a) of the plurality of peripheral portions of the packaging sheet (5) and covers the packaged object (C) with the packaging sheet (5),
The packaging sheet (
5), and the first wrapping plate (22) is pivotally supported at its tip so as to be relatively swingable, and is fixed to the output shaft of the swing motor (23). It consists of a swing drive arm (24). Said first wrapping plate (
The swing drive arm (22) is rotated by the biasing spring (8).
) to close and urge the tip of the first wrapping plate (
22) is made of an elastically deformable thin plate material, and is configured to easily conform to the circumferential surface of the packaged object (C) due to the elastic deformation force. The tip of the first wrapping plate (22) that performs the pressing action is formed into a fork shape. Said first wrapping plate (22)
A plate cam (25) is fixed to the rear end of the first
A roller type guide mechanism (
26), so that when the first wrapping plate (22) is actuated, the roller type guide mechanism (26) moves the first wrapping plate (26).
The first wrapping plate (22) is forced to act on the curved part of the first wrapping plate (22).
When the tip is directed toward the object to be packaged (C), and when the tip comes close to the object to be packaged (C), the plate cam (25) comes into contact with the roller type guide mechanism (26), and the first package is Board (
22) Move the tip approximately along the outer peripheral surface of the object to be packaged (C) and approximately away from it, and near the end of the movement, the plate cam (25) moves away from the roller type guide mechanism (26). When it comes off, the tip of the first wrapping plate (22) is attached to the object to be wrapped (
C) Move with a trajectory that goes inside from the outer peripheral surface. Therefore, the tip of the first wrapping plate (22) moves in sliding contact with the outer peripheral surface of the packaged item (C) due to its elastic force, and brings the portion (5a) of the packaging sheet (5) into close contact with the packaged item (C). be able to. Then, the first wrapping tool (18) assumes an operating position in which it presses and holds a portion (5a) of the packaging sheet (5) against the outer circumferential surface of the object to be packaged (C).

When the first wrapping device (18) or the wrapping sheet (5)-part (5a) has been covered, the second wrapping device (19) located 180° diagonally begins to operate.

The second wrapping tool (19) has almost the same structure as the first wrapping tool (18), the difference being that the tip of the second wrapping plate (27) is not shaped like a fork but is shaped like a strip. The reason is that it is formed on a single plate.

In other words, when placing a portion (5b) of the packaging sheet (5) on the first wrapping tool (18), the first wrapping tool (18)
The tip is inserted into the fork-shaped tip of the. Then, the second wrapping tool (18) is placed on the portion (5a) of the packaging sheet (5) that was initially covered
19) finishes overlapping the next portion (5b), the first wrapper (18) returns to its original standby position and assumes a non-working position.

The second wrapping plate (22) in the second wrapping tool (18) is inserted into the fork-shaped tip of the first wrapping plate (22) in the second wrapping tool (18).
Since the tip of the wrapping plate (27) is inserted, the corresponding parts (5a) and (5b) are folded over each other with sufficient weight allowance.

The third wrapper (20), which is subsequently activated, is configured as follows. As shown in FIG. 7, the swing motor (23)
A swing drive arm (24) driven by a swing drive arm (24), a roller support arm (34) pivotally supported at the tip of the swing drive arm (24) so as to be relatively swingable, and a swing drive arm (34) driven by a swing drive arm (24); A third packaging tool (20) is constituted by a packaging roller (28) that folds back a portion (5C) of the packaging sheet (5) and brings it into contact with and covers the outer peripheral surface of the item (C). The roller support arm (34) supports the object to be packaged (C
) The roller support arm (34) is configured to easily follow changes in the shape of the packaged object (C) due to its own elastic deformation force and the urging spring (29) that urges the roller support arm (34) in the direction of holding down the object (C).
A fixed plate cam (30) is provided outside the movement trajectory of the roller support arm (34), and a guide roller (34) is provided at the rear end of the roller support arm (34).
31) is installed, and the guide roller (31) comes into contact with the cam surface (30a) of the fixed plate cam (30), thereby causing the packaging roller (28) to contact the packaged object (C). It restricts entry beyond a certain level in the direction of the presser foot.

From the above, the third wrapping tool (20) is the part (3c)
When the sheets are stacked in the prescribed position, the second wrapping tool (19) returns to the standby position, and then the fourth wrapping tool (21) returns to the standby position.
) works as follows.

As shown in FIGS. 4 and 5, the fourth wrapping tool (2
1) includes a swinging drive arm (24) driven by a swinging motor (23), and a roller support arm (35) pivotally supported at the tip of the swinging drive arm (24) so as to be able to swing relative to each other. and a wrapping roller (28) that is pivotally supported at the tip of the roller support arm (35), and almost all of the third wrapping tool (2
The difference is that the roller support arm (35) is further divided into a base end (35A) and a distal end (35B) so as to be bendable and swingable. The wrapping roller (28) is pressed against the outer peripheral surface of the object to be packaged (C) by the urging spring (43) in the same way as the wrapping roller (28) of the third wrapping tool (20). Moving. In other words, the cam plate (32
), a guide roller (33) that engages with the cam hole (32a) and moves is pivotally supported on the rear end of the roller support arm (35), and the packaging roller (28) is moved along a predetermined trajectory. It is configured to be moved. Here, an adhesive tape (6) is attached to a part (5d) of the packaging sheet (5), and when the fourth wrapping tool (21) or the part (5d) is folded back and superposed at a predetermined position, the adhesive tape ( 6) The wrapping roller (28) moves on the portions (5a) and (5b) which are folded into four layers.

(5c), (5d) Paste the comrades. Here, since the tip of the roller support arm (35) can be bent and swung, even if the adhesive tape (6) is at a position where it has wrapped around the lower half of the object to be packaged (C), the packaging roller ( 28) can be sufficiently exerted.

Next, the folding mechanism (40) will be explained.

As shown in FIGS. 1 and 2, each of the four holding arms (2A) is formed into a hollow body having a cross section of a horizontally elongated hole, and is formed into a nozzle portion for ejecting air. An air outlet (2a) is formed at the tip of 2A). An air pipe (42) for supplying air is connected to the base end of each holding arm (2A), so that air is ejected from the holding arm (2A). When these holding arms (two people) act on the object to be packaged (C) and blow out air with the object to be packaged (C) fixed to the receiving stand (3), any of the above-mentioned wrapping tools ( 18) In the process of covering the packaged object (C) with the corresponding part (5a), the blown air acts on the installation part (5e) of the part (5a) and covers the installation part (5e). Packaging (C
) The other part (5c) is ejected so as to be in close contact with the surface, and the stationary part (5e) is in a standby state, (
5d) side, and even in a state in which one of the wrapping tools (18) or the corresponding part (5a) is finished covering and switched to the working position to maintain the folded state of the part (5a). , the said installation part (5e) is packaged (C)
and the other part (5c), (5d
) side.

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

As shown in Figure 1O, conveyance chains (41) (old) are arranged on the left and right to convey the packaging sheets (5) from the storage box (37) in which the packaging sheets (5) are stacked and stored to the packaging work position. At the same time, a transport portal frame (39) is connected to the chain link of this transport chain (41).

The packaging sheet (5) suction nozzles (38), (38) are attached to the conveyance concave frame (39) in a vertically movable manner, and as shown in FIG.
8), (38) is lowered to adsorb the packaging sheet (5), and is then lifted as it is to feed the packaging sheet (5) to the packaging work position as the conveying portal frame (39) moves. ing.

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

■ Pay out the adhesive tape (6) to one predetermined 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) is automatically attached to the last folded portion (5d) of the packaging sheet (5).

■ Then, the receiving stand (3) of the packaged object holding mechanism (2)
) Place the item to be packaged (C) on top. At the above stage, the first
It will be in the state shown in Figure 2 (a).

(2) Next, as shown in FIG. 12(B), 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
), the part (5a) of the packaging sheet (5) is folded back onto the top surface of the item to be packaged (C), and the first wrapping plate (22)
Maintain the presser foot condition.

■ As shown in Figure 12 (d), the second
The wrapper (19) is activated to overlay the corresponding portion (5b) of the packaging sheet (5) on the first wrapping plate (22). After overlapping the portions (5b), the first wrapper (I8) is returned to the standby position.

Next, as shown in FIG. 12 (e), the four upsetting folding mechanisms (40) are activated, and the four upsetting parts (5e), (
5f).

(2) Next, the third wrapping tool (2o) is activated, and when the remaining portion (5c) is overlaid, the second wrapping tool (19) is returned to the standby position.

■Furthermore, the fourth wrapping tool (21) is activated to fold back the part (5d) to which the adhesive tape (6) is attached and cover the object to be packaged (C), and wrap the four layers with the adhesive tape (6). (5a), (5b),
(5c), (5d) Attach the comrades and complete the packaging work.

[Another example]

(2) The number of the wrapping tools (I8) etc. is not limited to what is shown in the figure, and correspondingly, the shape of the packaging sheet (5) may also be polygonal or circular, and is not limited to a square.

■ The material for the packaging sheet (5) may be paper other than resin.

■ Each time the switch is manually operated to operate the wrapping tools (18) to (21), each wrapping tool (1
8) to (21) may be operated in a semi-automatic manner.

■ The material of the first and second wrapping plates (22) and (27) is such that the material to be packaged (C) is pressed down.
C) A thin steel plate other than resin, or a thin steel plate coated with resin, chrome plating, etc. on the surface may be used as long as it is elastically deformable and can suppress the influence on the wrapping device ( 18) to (21) include a wrapping tool (20), (21) provided with a wrapping roller (28), and a wrapping tool (18) without a wrapping roller (28),
(19) are formed to be different from each other, but all wrapping tools (18) to (21) may be formed to include a wrapping roller (28).

■ The object to be packaged may have a cylindrical shape other than a spherical shape.

■ Part (5a), (5b), (5c),
The wrapping tool (18), (19),
(20), (21), and artificial folding are collectively referred to as wrapping means.

■ As shown in FIG. 2, the folding mechanism (40) connects the air outlet (2a) with a holding arm (2).
A) It may be formed on the side surface together with the upper end, and the above-mentioned stationary parts (5e) and (5d) may be actively folded into the part side in the standby position.

■ In addition to the holding arm (2A), the packaged object holding mechanism (2) has a form in which the receiving stand (3) itself receives and holds the packaged object (C) with an elastically deformable peripheral wall surface. It is not specified as a form of retention. Then, an air outlet (2a), etc. is formed in accordance with the form of the packaged object holding mechanism (2), and a dual-purpose configuration is adopted in which the gas folding mechanism (40) is provided in the packaged object holding mechanism (2). be able to.

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 apparatus according to the present invention, in which FIG. 1 is a vertical sectional side view showing the operating state of the upsetting folding mechanism, FIG. 2 is a plan view showing the operating state of the upsetting folding mechanism, and FIG. 3 is a packaging apparatus. FIG. 4 is a side view showing the operation of the fourth wrapping device; FIG. 5 is a side view showing the state in which the third wrapping device is retracted with the operation of the fourth wrapping device; 6 is a side view showing the holding mechanism, FIG. 7 is a side view showing the operating state of the third wrapper, FIG. 8 is a plan view showing the wrapping mechanism, and FIG. 9 is a perspective view showing the holding mechanism. Figure 1O is an overall perspective view, Figures 11 (a) and (l) are side views showing the packaging sheet being fed out, and Figures 12 (a) to (su) are packaging work configurations, respectively. FIG. (C)...Packaged object, (2)...Packaged object holding mechanism, (3)...Receiving section, (5)
-=- Packaging sheet, (5a), (5b), (5c)
, (5d)--part, (5e), (5f)-
...Hem part, (18), (19), (20),
(211 old wrapping mechanism, (40)...gas type folding mechanism.

Claims (1)

[Claims] A receiving part (3) for receiving and supporting the packaged object (C) is provided, and a packaging sheet (5) located in this receiving part (3) is provided.
) The article to be packaged (C) placed on the receiving portion (
3) is provided with a packaged object holding mechanism (2) fixed to the packaged object holding mechanism (2), and the packaged object (C
), some of the plurality of parts (5a), (5b), (5c) at the peripheral edge of the packaging sheet (5)
, (5d) is folded back and covered, and the wrapping means act in a posture that maintains the folded state at the folded position of each of the above-mentioned parts, and the other parts (5b) are placed on the above-mentioned parts (5a), (5b), and (5c). , (5c), and (5d) are superimposed and retire to the standby position, and a plurality of wrapping means (18), (19), and (20) are switched to a non-operating posture.
, (21), and the part (5a
), (5b), (5c), both sides (5e), (
5f), and the other parts (5b) and (5c
), (5d) in order to fold it in toward the side (5d).
5e) and (5f) A packaging device in which a gas folding mechanism (40) for ejecting gas is formed in the packaged object holding mechanism (2).