JP2518941B2 - Packaging method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a packaging method for wrapping a packaged sheet represented by, for example, spherical vegetables such as lettuce with a packaging sheet.

[Conventional technology]

As what can be considered as a form of packaging this kind of spherical vegetables, the object to be packaged is placed on the expanded packaging sheet, and each side edge of the packaging sheet is bent by bending each part of the peripheral portion. There is one that is concentrated in one place, heat-welded and hermetically sealed.

[Problems to be Solved by the Invention]

In this way, only by hermetically sealing by heat-sealing, the finish of the heat-welding part is not aesthetically pleasing, and in order to perform aesthetic packaging, each part of the peripheral edge of the packaging sheet should be used. It is necessary to fold back and cover the outer peripheral surface of the packaged article, and then sequentially fold back and stack and fix it, and the process is performed manually.

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

An object of the present invention is to provide a method by a packaging device which has a good packaging finish and can improve work efficiency.

[Means for solving the problem]

The packaging method according to the present invention has an action posture in which the object to be packaged on the packaging sheet positioned at a predetermined packaging position is folded back over a portion of the peripheral edge of the packaging sheet to the outer surface of the object to be packaged. A packaging method by a packaging device comprising a plurality of wrapping devices that are switched to a non-acting position in which the other part is overlapped on the other part and retracted to a standby position, wherein one end of the wrapping sheet A first step of stacking a sheet with the package by the operation of a first wrapping tool, and the other end of the wrapping sheet by the operation of a second wrapping tool, the first position of the working posture.
The second step of overlapping a part of the packaging sheet and the object to be packaged from above the packaging tool, and one end and the other end of the packaging sheet are overlapped with each other, and the second packaging tool is in the working posture. The third step of retracting the first wrapping tool to the standby position is performed in this order.

The operation and effect of such a feature are as follows.

[Work]

That is, a number of wrapping tools corresponding to the folded-back portions are provided by folding back a part of the peripheral edge of the packaging sheet on which the article to be packaged is spread and the plurality of wrapping tools are sequentially arranged. The first wrapping device that is activated first folds a part of the corresponding peripheral edge portion of the packaging sheet while folding it back up to the folding position, and at that folding position When a part of the wrapping sheet is pressed into a working posture, the second wrapping tool starts its operation while folding back a part of the corresponding peripheral edge of the packaging sheet. Then, the next second wrapping tool is switched to the working posture, and then the first wrapping tool in the previous working posture is retracted to the standby position and switched to the non-working posture. In this way, the plurality of wrapping tools repeat the operation in sequence, and a part of the peripheral edge portions at a plurality of positions are folded to wrap the article to be packaged.

〔The invention's effect〕

Therefore, as in the case of manual operation, each wrapping tool is used to fold back a part of the peripheral edge of the packaging sheet in sequence and superimpose it at the folding position to perform packaging without impairing the aesthetic appearance. Even if the former wrapping tool retreats from the overlapped portion of the sheet to the standby position, one end of the wrapping tool folded up by the previous wrapping tool is kept in the same state as the next wrapping tool and is not separated. For example, wrapping can be performed well without adhering to each sheet portion to be overlapped, and the work time can be shortened by the amount not requiring such adhering, so that work efficiency can be improved and labor can be saved.

〔Example〕

As shown in FIG. 3 and FIG. 12, the packaging device (A) used in the method of the present invention is a packaging workbench (1) and a package work position provided on the packaging workbench (1). Adhesion to a wrapping device (B) including a package holding mechanism (2), a receiving base (3), a wrapping mechanism (4), and a wrapping sheet (5) as a wrapping sheet placed at the wrapping work position. An adhesive / fixing means supply device (7) for applying the fixing means (6) and a packaging sheet supply mechanism (36) for automatically supplying the packaging sheet (5) in the expanded state at the packaging operation position are provided. Here, as the object to be packaged (C), spherical vegetables such as lettuce are targeted, 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 packaged object holding mechanism (2), the receiving stand (3),
The wrapping device (B) such as the wrapping mechanism (4) will be described. As shown in FIGS. 3 and 8, the holding mechanism (2) moves the first moving member (10) and the second moving member (11) up and down on the vertical sliding shaft (9) which also serves as a column. It fits as much as possible, and a compression spring (12) is interposed between the two (10) and (11) to maintain a constant interval. At the upper end of the sliding shaft (9), a receiving stand (3) for receiving the article to be packaged (C) is provided, and the receiving stand (3) mainly protrudes in four directions around the outer circumference of the disc (3a). ) Is provided. On the other hand, with respect to the top plate of the first moving member (10) as well, the four arms (13) are radially extended while being positioned below the arm portions (3a), and the four arms (13) are also extended. The arm (13) and the four arm portions (3a) are connected by four bending links (14), respectively. A holding arm (2A) is pivotally supported at the tip of the arm portion (3a) so as to be vertically swingable, and the arm (4A) is linked to the bending link (14) respectively to form the bending link (14). In accordance with the refraction and swinging of the holding arm (2A), the holding arm (2A) abuts against the side surface of the object (C) placed on the receiving base (3) and holds it. One end of a balance-type drive arm (15) that swings up and down is linked to the side surface of the second moving member (11), and the balance-type drive arm (15) is connected to the other end of the balance-type drive arm (15). ) Vertically swinging crank arm (1
6) is linked, the crank arm (16) is attached to the output shaft of the drive motor (17), and the second moving member (11) is moved up and down. Therefore, as shown in FIG. 2, when the second moving member (11) is moved upward from the state where the holding arm (2A) is opened, first, the compression spring (12) is pressed and the pressing force is applied. Push up the first moving member (10). Then, due to the bending of the bending link (14), the holding arm (13) rises and swings to hold the lower half of the article to be packaged (C).

Next, the wrapping mechanism (4) will be described. As shown in FIGS. 3 to 7, the wrapping mechanism (4) includes first to fourth wrapping tools (18), (1) arranged radially.
It is composed of 9), (20), and (21). The first wrapping tool (18) first operates when the holding arm (2A) holds the article to be packaged (C). This first wrapping tool (1
8) is a wrapping plate which covers the packaging sheet (5) on the article to be packaged (C) while folding back a part of the peripheral edge of the packaging sheet (5) and fixes the article to be packaged (C) at the upper center position. (22) and a swing arm (24) that pivotally supports the wrapping plate (22) at its tip end so as to be capable of relative swing and is fixed to the output shaft of the swing motor (23). As shown in FIG. 11, the wrapping plate (22) is urged by the urging spring (8) to close the oscillating arm (24) and is formed of an elastically deformable thin plate resin material. The elastic deformation force facilitates conformability to the peripheral surface of the article to be packaged (C), and the urging spring (8) urges the article to be packaged (C) in a pressing direction. The tip that performs the pressing action is formed in a fork shape. A plate cam (25) is fixed to the rear end of the wrapping plate (22),
A roller type guide mechanism (26) is provided on the outer side of the movement path of the wrapping plate (22) so that when the wrapping plate (22) is operated, the roller type guide mechanism (26) causes the curved portion of the wrapping plate (22). Action, the tip of the wrapping plate (22) is forced to face the article to be packaged (C), and when the tip approaches the article to be packaged (C), the plate cam (25) causes the roller guide mechanism to move. When it comes into contact with (26), the tip of the wrapping plate (22) moves in a state substantially along the outer peripheral surface of the object to be packaged (C), and the plate cam (25) is moved near the moving end by the roller guide mechanism. When separated from (26), the tip of the wrapping plate (22) moves along a locus that enters inside the outer peripheral surface of the article to be packaged (C). Therefore, the tip of the wrapping plate (22) is slidably moved by the elastic force to the outer peripheral surface of the article to be packaged (C), and a part of the peripheral edge of the packaging sheet (5) can be placed on the article to be packaged (C). it can.

Next, a packaging method of the present invention using the packaging device (A) will be described.

[1] In the first step, the first wrapping tool (18) covers a part of the peripheral edge of the packaging sheet (5) as the first wrapping tool on the article to be packaged (C).

[2] This first wrapping tool (18) when the above first step is completed
The second wrapping tool (19) located diagonally 180 ° from the second
It starts to operate as a wrapping tool. In this second step,
The second wrapping tool (19) has substantially the same configuration as the first wrapping tool (18). The difference is that the tip of the second wrapping plate (27) is not a fork-shaped one but a strip-shaped one. A fork of the first wrapping tool (18) which remains in a working posture when a part of the peripheral edge of the wrapping sheet (5) formed as a single plate is put on the first wrapping tool (18). The tip is inserted into the tip. Then, the second wrapping tool (19) superimposes a part of the next other peripheral edge part on a part of the peripheral edge part of the packaging sheet first covered by the first wrapping tool (18).

[3] After completing the second step, the first wrapping tool (18)
Performs the third step of returning to the original standby position. In this case, the second wrapping plate (22) of the first wrapping tool (18) has a second tip inside the tip of the crack.
Since the tip of the wrapping plate (22) of the wrapping tool (18) is inserted, a part of the peripheral edge of the corresponding wrapping sheet (5) is folded and folded with a sufficient weight allowance. Here, in the relationship between the first wrapping tool (18) and the second wrapping tool (19), the first wrapping tool (18) corresponds to the first wrapping tool, and the second wrapping tool. (19) corresponds to the second wrapping tool. Therefore, the first step, the second step, and the third step are sequentially performed.

[4] Next, the third wrapping tool (20) operates. As shown in FIG. 4, the third wrapping tool (20) is swingable relative to the swing arm (24) driven by a swing motor (23) and the tip of this swing arm (24). A roller support arm (34) supported axially, and a part of the peripheral edge of the packaging sheet (5) is folded back at the tip of the roller support arm (34) to cover the outer peripheral surface of the article to be packaged (C). The wrapping roller (28) is pivotally supported. As shown in FIG. 10, the roller support arm (34) is urged by the urging spring (29) in a direction to press the object to be packaged (C), and is itself elastically deformable. The configuration is such that it can easily follow the shape change of the object (C). Therefore, as shown in FIG. 4, the third wrapping tool (20) swings toward the article to be packaged (C) and moves along the article to be packaged (C). The object to be packaged (C) by the force of the spring (29)
A part of the peripheral edge of the packaging sheet (5) is covered on the second wrapping tool (19) which is moved in contact with the outer peripheral surface of the packaging sheet and remains in the working posture.

A fixed plate cam (30) is provided so that the wrapping roller (28) does not enter the article to be packaged (C) above a certain level while maintaining this locus, while the roller support arm (34) is provided with a rear end at the rear end. A guide roller (31) that moves along a cam surface (30a) formed on the end surface of the fixed plate cam (30) is mounted.

From the above, when the third wrapping tool (20) finishes overlapping part of the peripheral edge of the packaging sheet (5) at a predetermined position, the second wrapping tool (19) returns to the standby position, and subsequently, The fourth wrapping device (21) operates.

[5] As shown in FIG. 5, the fourth wrapping tool (21) has a swing arm (24) driven by a swing motor (23).
A roller support arm (35) axially supported by the tip of the swing arm (24) so as to be relatively swingable, and a packaging roller (28) pivotally supported by the tip of the roller support arm (35). And has almost the same structure as the third wrapping tool (20), but the roller supporting arm (35) is further divided into a base end portion and a tip end portion so as to be capable of bending and swinging. The points are different. The wrapping roller (28) is set so as to move in contact with the outer peripheral surface of the article to be packaged (C), like the wrapping roller (28) of the third wrapping tool (20). That is, the cam plate (32) having the long hole-shaped cam hole (32a) is provided,
Guide roller (3) that moves by engaging with the cam hole (32a)
3) is pivotally supported on the rear end of the roller support arm (35), and the packaging roller (28) is configured to move the base end portion along a predetermined locus. Here, an adhesive tape (6) as an adhesive fixing means is attached to a part of the peripheral edge of the packaging sheet (5), and when a part of the peripheral edge is folded back and polymerized at the folding position, the adhesive tape ( 6) The wrapping roller (28) moves on the top surface of the wrapping roller (28) to attach the parts of the peripheral portions folded into four layers. At this time, as shown in FIGS. 1 (h) and 1 (l), the third wrapping tool (20) is maintained in the working posture and the wrapping sheet (5) is kept in the folded state, With the progress of the folding of the jamming tool (21) and the progress of applying the adhesive tape (6),
Will retire to the standby position. Here, since the tip end of the roller support arm (35) is capable of bending and swinging, even when the adhesive tape (6) is wrapped around the lower half of the article to be packaged (C), the packaging roller ( It is possible to fully exert the holding action of 28).

Next, the supply mechanism (36) for feeding the packaging sheet (5) to a predetermined position on the packaging work table (1) will be described. 12th
As shown in the drawing, a pair of left and right disc bodies (one from the one located above the laminated packaging sheet (5) stored in the storage box (41) of the packaging work table (1) are bonded and lifted ( 38)
Is attached to the lateral support shaft (39), and the lateral support shaft (39) is erected on the left and right support plates (42) and (42) to be integrated, and the left and right support plates (42) and (42) are integrated. Is attached to the link of the chain (43) so that the disc body (38) can be moved from the storage box (41) to the packaging work position.
The disc body (38) is vertically movable with respect to the support plates (42) and (42) together with the lateral support shaft (39) (a drive mechanism for vertical movement is not shown), and A pressure-sensitive adhesive layer for adhering the packaging sheet (5) is formed on the outer peripheral surface thereof,
When the outer peripheral surface is pressed against the upper surface of the packaging sheet (5) and the packaging sheet (5) is adhered, the packaging sheet (5) is lifted up as it is and is advanced to the packaging work position while maintaining a gap with the packaging sheet (5) immediately below. .

Together with the left and right support plates (42) and (42), the disc body (3
When the left and right support plates (42), (42) are rotated as shown by the arrows in Fig. 13 (a) with the 8) abutting on the surface of the packaging sheet (5), the end of the packaging sheet (5) When the disk body (38) is lifted up and moved as it is, the part is "turned up", and the disk body (38) is fed to the packaging work position in the "turned up" state as shown in the figure. When the packaging sheet (5) is delivered to the packaging work position, the pair of left and right retainers (44) are operated to separate the packaging sheet (5) from the disc body (38), and the packaging sheet (5) is removed. While pressing, the disc body (38) is separated from the packaging sheet (5). The disc body (38) may be configured to reciprocate between the storage box (41) and the packaging work position, or may be circulated along the circulation path of the chain (43). In this way, since it is fed in the "turning up" state, there is no need to feed two sheets of the next packaging sheet (5), and there is no need to blow air or the like for separation.

Next, a supply device (7) for feeding the adhesive tape (6) to a predetermined position is provided at the packaging work position where the packaging sheet (5) is placed, and the adhesive tape (cut to a predetermined length) ( 6) is fed out with the adhesive surface facing upward at a position where a part of the peripheral edge part of the peripheral edge part of the packaging sheet (5), which is finally folded, is placed. Therefore, when the adhesive tape (34) is placed at a predetermined position and the packaging sheet (5) is placed thereon in a predetermined posture, a part of the peripheral edge portion of the packaging sheet (5) which is folded back to the end automatically. Glued to.

Next, the procedure of the packaging work including the packaging method according to the present invention will be described with reference to FIG.

 The adhesive tape (6) is delivered to a predetermined position.

Next, put the packaging sheet (5) on the disk bodies (38), (38).
It is taken out from the storage box (41), conveyed, and placed at a predetermined position. In this case, the adhesive tape (6) is attached to the packaging sheet (5) at a predetermined position. (See FIG. 1A) Then, the article to be packaged (C) is placed on the receiving base (3) of the article to be packaged holding mechanism (2). (See FIG. 1 (A)) Next, the wrapping mechanism (4) is operated to hold the article to be packaged (C). (See FIG. 1 (B)) The first wrapping tool (18) is actuated to fold back a part of the peripheral edge of the packaging sheet (5) to the upper surface of the article to be packaged (C), and the wrapping plate (22). Hold down the work clamp. (First step) Then, before the third wrapping tool (28) is actuated, the first wrapping tool (28) is directed toward the bent part so that one side end is covered without bulging along the outer peripheral surface of the spherical object to be packaged (C). Spray air from the side. (See FIG. 1 (c)) The second wrapping tool (19) in a diagonal position is actuated, and the corresponding one end of the packaging sheet (5) is overlaid on the wrapping plate (22). (Second step) (See FIG. 1 (d))
Next, when the one side end is overlaid, the first wrapping tool (18) returns to the standby position. (Third step) (see FIG. 1 (e)) Subsequently, when the third wrapping tool (20) is activated and part of the remaining peripheral edge portion is overlaid, the second wrapping tool (19) is at the standby position. Return to. (Refer to FIG. 1 (f) and (g)) Furthermore, the fourth wrapping tool (21) folds back a part of the peripheral portion to which the adhesive tape (6) is attached, and then the wrapped article (C) is covered. The third wrapping tool (20) returns to the standby position, and each one side end folded in four layers with the adhesive tape (34) is attached to complete the wrapping operation (see FIG. ), (Re)). Although not shown, electric control means for each rocking motor (23) is provided in order to sequentially operate each wrapping tool (18)-(21).

[Other Embodiments] The number of the wrapping tools (18) and the like is not limited to that shown in the figure, and correspondingly, the shape of the packaging sheet (5) may be circular instead of square.

The material of the packaging sheet (5) may be paper instead of resin.

Every time a switch is artificially operated to operate the wrapping tools (18) to (21), the wrapping tools (18) to (21) are driven.
A semi-automatic form may be adopted so that (21) operates.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a packaging method by a packaging device according to the present invention, and FIGS. 1 (a) to (i) are explanatory views showing a packaging operation state, and FIG. 2 shows a packaged object holding mechanism. Side view,
FIG. 3 is a side view showing an operating state of the first wrapping tool, FIG. 4 is a side view showing an operating state of the third wrapping tool, and FIG.
A side view showing an operating state of the wrapping tool, FIG. 6 is a side view showing a state in which the fourth wrapping tool has reached a folding position, and FIG. 7 is a plan view showing the wrapping tool and a package-holding mechanism. FIG. 8 is a perspective view showing a package holding mechanism, FIG. 9 is a perspective view showing a first wrapping tool, FIG. 10 is a perspective view showing a second wrapping tool, and FIG. 11 is a first wrapping tool. Side view showing the mounting state of the swing arm and the wrapping plate in the tool, FIG. 12 is an overall perspective view, and FIG. 13 (a) is a side view showing the state of taking out the packaging sheet from the storage box.
FIG. 6B is a side view showing a state in which the packaging sheet is delivered to the packaging position. (5) …… Packaging sheet, (18) to (21) …… Wrapping tool,
(C) ... Packaged item.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-63-281922 (JP, A) JP-A-50-66386 (JP, A) JP-A-48-97685 (JP, A) JP-A-59- 142924 (JP, A) Actual Flat 3-49905 (JP, U) Actual Flat 3-49906 (JP, U) Japanese Patent Sho 36-13049 (JP, B1) Japanese Patent Sho 50-20511 (JP, B1)

Claims (1)

(57) [Claims] 1. An object to be packaged (C) on a packaging sheet (5) located at a predetermined packaging position is replaced with the packaging sheet (5).
A plurality of portions that are switched to an acting posture in which a part of the peripheral portion of the article is folded back on the outer surface of the article to be packaged (C) and a non-acting posture in which the other portion is overlapped on the portion and retracted to the standby position. A packaging method using a packaging device equipped with individual wrapping devices (18 to 21), wherein one end of the packaging sheet (5) is actuated by a first wrapping device (18) to provide the packaged object (C). ) And the other end of the wrapping sheet (5) is actuated by a second wrapping tool (19) so that the wrapping is performed from above the first wrapping tool (18) in the working posture. Sheet (5)
A second step of overlapping a part of the above and the article to be packaged (C),
Third step of retracting the first wrapping tool (18) to the standby position in a state where the one end and the other end of the packaging sheet (5) overlap each other and the second wrapping tool (19) is in the working posture. And the packaging method to do in this order.