JP2518946B2 - Packaging equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a packaging device for wrapping an object to be packaged represented by spherical vegetables such as lettuce with a packaging sheet.

[Conventional technology]

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

[Problems to be Solved by the Invention]

In such a case where only the heat-sealing is carried out in a hermetically sealed package, the finish of the heat-sealed portion is not aesthetically pleasing, and in order to perform aesthetic packaging, each side edge of the packaging sheet should be A work form is required in which the products are sequentially folded and covered on the outer peripheral surface of the packaged object, and the folded one side ends are fixed, and the process is performed manually.

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

An object of the present invention is to provide a product which has a good packaging finish and can be improved in work efficiency, and which can achieve a better degree of adhesion of a packaging sheet to an article to be packaged.

[Means for solving the problem]

The packaging device according to the present invention folds each side edge of the peripheral edge of the packaging sheet on which the article to be packaged is placed to cover the article to be packaged, and the other one side edge of the peripheral edge that has been folded back in advance. A plurality of folds which are switched between an acting posture for maintaining the folded state and a non-acting posture for retracting to the standby position with the next one side end superposed on the one side end of the peripheral edge portion. Of the packaging sheet is provided corresponding to each one end of the packaging sheet, and the packaging sheet is pressed by at least a pair of the packaging articles arranged at positions opposite to each other of the packaging sheet. A wrapping roller, a roller supporting arm that supports the wrapping roller, and an oscillating motion that is switched up and down to switch between an operating posture in which the roller supporting arm is maintained in the folded state and a non-acting posture in which the roller supporting arm is retracted to the standby position. With a dynamic drive arm Further, the roller support arm is configured so as to elastically urge the packaging roller of each of the wrapping devices toward the arm to be wrapped, and the roller support arms are arranged at the opposite positions. A pair of wrapping tools, one of the pair of wrapping tools to a position where one side end of the packaging sheet is held in the working posture by folding the one end of the packaging sheet,
The other proceeds while folding the other side end of the packaging sheet so as to switch to the folding action position of the one wrapping tool, and with the progress, the one wrapping tool retracts to the non-acting posture. It is characterized in that it is configured to operate synchronously as described above.

 The operation and effect of this characteristic configuration are as follows.

[Action]

That is, when the wrapping roller is applied to one corresponding side end of the wrapping sheet, the swing drive arm is rotated in one direction toward the upper side so as to fold the wrapping sheet and wrap the article to be wrapped. A roller support arm connected to the swing drive arm moves, and with the movement of the roller support arm, the one end is folded back by the wrapping roller, and a portion closer to the center of the wrapping sheet than the one end. To the object to be packaged, and urging the roller support arm toward the object to be packaged. When the one side end folded back by the wrapping roller is folded over the one side end covered with the wrapping roller, the oscillating drive arm is stopped and the one side end is pressed by the wrapping roller to maintain the state. Kick.

This state is the working posture state of the wrapping tool. Then, when the next one side end is folded back and folded on the other one side end, the wrapping tool is retracted and switched to the non-acting posture.

As described above, in this wrapping device, the packaging sheet is covered while being pressed against the surface of the packaged object,
Since the roller support arm is connected to the swing drive arm so as to be able to swing relative to each other, and the packaging roller is urged in a direction to press the packaging roller against the packaging object, the packaging sheet is packaged. You can cover it closely.
Moreover, since it is the packaging roller that directly acts on the packaging sheet and moves on the surface of the article to be packaged, it does not penetrate deeply into the packaging sheet to damage it or damage the surface of the article to be packaged.

Moreover, when one of the wrapping tools arranged at the opposite position wraps first and is in the working posture, as the other wrapping tool advances to the working position of the one wrapping tool. Since one of the wrapping tools is in a retracted non-working posture, both wrapping rollers hold one side end of each wrapping sheet in close contact with the object to be wrapped and wrap the other wrapping sheet. The wrapping sheet is folded with the jamming tool,
Good packaging can be performed with high adhesion of the packaging sheet to the article to be packaged.

〔The invention's effect〕

Therefore, the ability to follow the difference in size of the packaged items and the undulation of the outer peripheral surface of the same packaged item is improved, the smooth movement of the packaging roller is possible, and the packaging sheet is easily damaged. Provide a device that can be automatically packaged without damaging the packaging sheet and damaging the object to be packaged when packaging the object to be packaged such as lettuce whose shape and size are not constant, while maintaining its aesthetic appearance I was able to do it.

Example As shown in FIGS. 3 and 10, the packaging device (A) is
A packaging workbench (1) and a packaged object holding mechanism (2) provided at a packaging work position on the packaging workbench (1).
A wrapping device (B) including a receiving table (3) and a wrapping tool (4), and an adhesive fixing means supplying device (6) for applying an adhesive fixing means (6) to the packaging sheet (5) placed at the packaging operation position ( 7) and the packaging sheet (5) at the packaging work position.
Sheet feeding device (8) that automatically feeds with the paper spread
It has and. 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 tool (4) will be described. As shown in FIG. 4, FIG. 8 and FIG. 9, the holding mechanism (2) is provided with a vertical sliding shaft (9) which also serves as a column.
The moving member (10) and the second moving member (11) are externally fitted so as to be vertically movable, and a compression spring (12) is interposed between the two (10) and (11) to maintain a constant interval. . On 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) is provided with arms (3a) projecting in all directions on the outer circumference of the disk. is there.

On the other hand, the four arms (13) are extended radially while being positioned below the arm portions (3a) with respect to the top plate of the first moving member (10), and the four arms are also extended. (13) and the four arm portions (3a) are connected by four bending links (14), respectively. A holding arm (2A) is pivotally supported on the tip of the arm portion (3a) so as to be vertically swingable,
The arms (2A) are linked to the bending links (14) respectively, and as the bending links (14) bend and swing, the object to be packaged (C) placed on the receiving base (3) is held by the holding arms. Hold at (2A). The holding member (2A) has an arcuate shape in a side view along the outer peripheral surface of the article to be packaged (C) from the base end portion to the tip end portion pivotally supported by the arm portion (3a), and has a flat surface. The shape is such that the lateral width is wide at an intermediate portion between the base end portion and the tip end portion as viewed, and gradually narrows toward the base end portion and the tip end portion. Therefore, fixing and holding of the article to be packaged (C) is good. Also, the holding member (2A)
The tip of is curved outward so that it does not bite into and damage the outer peripheral surface of the article to be packaged (C) when it comes into contact with the article to be packaged (C).

One end of a balance-type drive arm (15) swinging up and down is linked to the side surface of the second moving member (11), and the balance-type drive arm (1) is connected to the other end of the balance-type drive arm (15).
A crank arm (16) for vertically swinging 5) 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, when the second moving member (11) is moved upward from the state where the holding arm (2A) is opened, first, the first moving member (10) is pushed up by the pressing force of the compression spring (12). Then, the holding link (13) is bent by bending the bending link (14).
Rises and swings to hold the lower half of the object to be packaged (C).

Next, the wrapping tool (4) will be described. As shown in FIG. 3 and FIG. 8, the wrapping tool (4) includes first to fourth wrapping tools (18), (19), (2) arranged radially.
It consists of 0) and (21). The first wrapping tool (18) first operates when the holding arm (2A) holds the article to be packaged (C). In this first wrapping tool (18), one end (5a) of the peripheral edge portion of the packaging sheet (5) is folded back, and the packaging sheet (5) is put on the article to be packaged (C), and then the article to be packaged. The first wrapping plate (22) fixed at the upper center position of (C) and the first wrapping plate (22) are rotatably supported at the tip end thereof, and the output shaft of the swinging motor (23). And an oscillating drive arm (24) fixed to the. The first wrapping plate (22) is made of an elastically deformable thin plate material, and is configured to easily fit to the peripheral surface of the object to be packaged (C) by this elastic deformation force. First wrapping plate (2
The tip that performs the pressing action of 2) is formed in a fork shape. A plate cam (25) is fixed to the tip of the first wrapping plate (22), and a roller type guide mechanism (26) is provided outside the movement locus of the first wrapping plate (22). When the plate (22) is operated, the roller type guide mechanism (26) acts on the curved portion of the first wrapping plate (22) to force the tip of the first wrapping plate (22) toward the article to be packaged (C). Dodge

When the tip of the first wrapping plate (22) reaches near the object to be packaged (C), the plate cam (25) causes the roller type guide mechanism (26).
The first wrapping plate (22) and the tip end of the first wrapping plate (22) substantially along the outer peripheral surface of the object to be packaged (C) and in a state of being substantially separated from each other, and the plate cam (25) near the moving end. ) Is disengaged from the roller type guide mechanism (26), the tip end of the first wrapping plate (22) moves along a locus that enters the outer peripheral surface of the article to be packaged (C). Therefore, the tip of the first wrapping plate (22) moves by sliding on the outer peripheral surface of the object to be packaged (C) by its elastic force, and the one end (5a) of the packaging sheet (5) is moved to the object to be packaged (C). Can be adhered to. And the first wrapping tool (18)
Is in a working posture in which one side end (5a) of the packaging sheet (5) is pressed and held on the outer peripheral surface of the article to be packaged (C).

When the first wrapping tool (18) has finished covering the one end (5a) of the packaging sheet (5), the second wrapping tool (19) diagonally located at 180 ° starts to operate.

The second wrapping tool (19) has substantially the same structure 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. When the one end (5b) of the packaging sheet (5) formed on a single plate is put on the first wrapping tool (18), the tip is inserted into the fork-shaped tip of the first wrapping tool (18). I am doing it.
And the second wrapping tool (19) is the first wrapping tool (18)
The wrapping sheet (5) first covered by
When the next one side end (5b) is overlaid on a), the first wrapping tool (18) returns to the original standby position and is in the non-working posture.
In this case, the tip of the wrapping plate (22) of the second wrapping tool (18) is inserted into the tip of the tip of the wrapping plate (22) of the first wrapping tool (18). (5b) is folded with sufficient weight.

Next, the third wrapping tool (20) is activated. As shown in FIG. 5, the third wrapping tool (20) is a swing motor (2
3) A swing drive arm (24) driven by the swing support arm, a roller support arm (34) pivotally supported by the tip of the swing drive arm (24) so as to be relatively swingable, and the roller support arm (34). The packaging roller (28) is configured such that one end (5c) of the packaging sheet (5) is folded back at the tip of the packaging sheet (5) and brought into contact with the outer peripheral surface of the article (C) to be wrapped. The roller support arm (34)
The urging spring (29) urges the object to be packaged (C) in the direction in which the object to be packaged (C) is pressed, and the object to be packaged (C) is elastically deformed.
The configuration is easy to follow the change in shape. A plate cam (30) fixed outside the movement locus of the roller support arm (34).
And the guide roller (31) is attached to the rear end of the roller support arm (34), and the guide roller (31) contacts the cam surface (30a) of the fixed plate cam (30). , The regulation of the wrapping roller (28) with respect to the object to be packaged (C) in the direction of contacting and pressing is regulated.

As shown in FIG. 2, the wrapping roller (28) is cantilevered by the roller support arm (34) by the fixed shaft (41) and the collar (42), and its outer circumference is like a pulsation. A concave portion (28a) recessed toward the central portion of the surface and a circumferential surface portion (28b) are formed on both sides of the concave portion (28a), and the concave portion (28a) is configured to press the object to be packaged (C). ing. From the above, when the third wrapping tool (20) finishes stacking the one side end (5c) at the predetermined position, the second wrapping tool (19) returns to the standby position, and subsequently, the fourth wrapping tool. The fitting (21) is activated.

As shown in FIGS. 5 to 7, the fourth wrapping tool (21) includes a swing drive arm (24) driven by a swing motor (23), and the swing drive arm (24). The roller support arm (35) pivotally supported at the tip of the roller support arm (35) and the packaging roller (28) pivotally supported at the tip of the roller support arm (35). It has the same structure as the tool (20), except that the roller support arm (35) is further divided into a base end portion (35A) and a tip end portion (35B) so as to be capable of bending and swinging. The wrapping roller (28) moves in a state of being pressed against the outer peripheral surface of the article to be packaged (C) by the biasing spring (43) like the wrapping roller (28) of the third wrapping tool (20). To do. That is, the long cam hole (32
A cam plate (32) having a) is provided, and the cam hole (32a) is provided.
A guide roller (33) which is engaged with and moves is pivotally supported on the rear end of the roller support arm (35) to move the packaging roller (28) along a predetermined locus. Here, an adhesive tape (34) as an adhesive fixing means is attached to one side end (5d) of the packaging sheet (5), and the one side end (5d) is folded back and polymerized at a predetermined position. The wrapping roller (28) moves over the (34), and the side edges (5a), (5b), (5c), which are folded into four layers,
(5d) Attach the comrades. Here, since the tip end of the roller support arm (35) is capable of bending and swinging, even if the adhesive tape (34) wraps around the lower half of the article to be packaged (C), the wrapping 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. 10th
As shown in the figure, the transport chains (41) and (41) for transporting the packaging sheets (5) from the storage box (37) in which the packaging sheets (5) are stacked and stored to the packaging work position are arranged on the left and right, The carrier gate frame (39) is connected to the chain link of the carrier chain (41). The transfer gate type frame (39) is provided with the packaging sheets (5) suction nozzles (38), (38) on the left and right so as to be movable up and down.
As shown in FIG. 5, the suction nozzles (38) and (38) descend to suck the packaging sheet (5), and the packaging sheet (5) is lifted as it is with the movement of the transfer gate frame (39). ) Is delivered to the packaging work position.

The work mode will be described with reference to FIG. 12 with the above configuration.

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

Next, the packaging sheet (5) is taken out from the storage box (37), conveyed, and placed at a predetermined position. Then, the adhesive tape (6) can be attached to the one end (5d) of the packaging sheet (5) which is folded back at the end.

Then, the article to be packaged (C) is placed on the receiving table (3) of the article to be packaged holding mechanism (2). The steps so far are the states shown in FIG.

Next, as shown in FIG. 12 (B), the package-holding mechanism (2) is operated to hold the package (C).

As shown in FIG. 11 (c), the first wrapping tool (18) is actuated to fold back one side end (5a) of the packaging sheet (5) to the upper surface of the article to be packaged (C), and then the first wrapping. The holding state of the plate (22) is maintained.

As shown in FIG. 11 (d), the second wrapping tool (19) in the diagonal position is actuated to move the corresponding one end (5b) of the wrapping sheet (5) to the wrapping plate (22). Stack from the top.
As shown in FIG. 12 (e), when the one side end (5b) is overlaid, the first wrapping tool (18) returns to the standby position.

Next, along the outer peripheral surface of the object to be packaged (C), one side end (5
c), (5d) so that the third wrapping device (2
Blow air against the bent part before 0) operates.

Then, as shown in FIGS. 12 (f) and (g),
When the wrapping tool (20) is actuated and the remaining one side end (5c) is completely stacked, the second wrapping tool (19) returns to the standby position.

Further, as shown in FIGS. 12 (H) and (L), the one end (5d) to which the adhesive tape (6) is attached is attached to the fourth wrapping device (2).
1) Folded back on the article to be packaged (C), and each side edge (5a) is folded in four layers with the adhesive tape (6),
(5b), (5c), (5d) Stick the comrades together and finish the packaging work.

[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) is also polygonal or circular other than square. Good.

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.

As a material of the wrapping plate (22), a thin steel plate other than resin or a thin steel plate other than resin can be used as long as it is elastically deformable so as to suppress the influence on the object to be packaged (C) in an action posture of pressing the object to be packaged (C). The surface of the thin steel plate may be coated with resin or chrome plating.

As the wrapping tools (18) to (21), wrapping tools (20) and (21) provided with a wrapping roller (28) and wrapping tools (18) and (19) not provided with the wrapping roller (28). However, all the wrapping tools (18) to (21) may be formed to have a wrapping roller (28).

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

The cam mechanism (30) is configured so that the position thereof can be adjusted with respect to the wrapping tool (20) or that the cam surface shape can be changed according to the size of the article to be packaged (C). You may.

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 the packaging device according to the present invention. Fig. 1 is a front view showing a third wrapping tool and a cam mechanism, Fig. 2 is a vertical sectional view of a wrapping roller, and Fig. 3 is a wrapping device. 4 is a front view showing the wrapping mechanism, FIG. 5 is a front view showing the operating state of the third wrapping tool, and FIG. 6 is a front view showing the operating state of the fourth wrapping tool. 7 is a front view showing the retracted state of the third wrapping tool, FIG. 8 is a plan view showing the wrapping device, FIG. 9 is a perspective view showing the wrapping mechanism, FIG. 10 is an overall perspective view, 11
FIGS. 12 (a) and 12 (b) are front views showing the conveyance state of the packaging sheet, and FIGS. 12 (a) to 12 (i) are operation diagrams showing the packaging process. (5) …… Packaging sheet, (5a), (5b), (5c), (5
d) …… One side edge, (18), (19), (20), (21) ……
Wrapping tool, (24) …… Rotation drive arm, (28) …… Wrapping roller, (30) …… Regulation mechanism, (34) …… Roller support arm.

Claims (1)

(57) [Claims] 1. A side edge (5a), (5b), (5) at a peripheral edge of a packaging sheet (5) on which an article to be packaged (C) is placed.
c) and (5d) are folded back and covered on the object to be packaged (C),
It is folded back to the other one end (5a), (5b), (5c) of the peripheral edge portion that has been folded back in advance, and an operating posture for maintaining the folded state, and one side edge (5a) of the peripheral edge portion. ), (5b), (5c) and the next one side edge (5b), (5
c), a plurality of wrapping tools (18) that switch to a non-acting posture in which they are retracted to the standby position in the state where (5d) are superposed,
(19), (20) and (21) are provided corresponding to the respective one side ends (5a), (5b), (5c) and (5d) of the packaging sheet (5), and the wrapping device ( The packaging sheet (5) is pressed by at least a pair of wrapping tools (20) and (21) arranged at opposite positions of 18), (19), (20) and (21). Wrapping rollers (28), (28) and their wrapping rollers (2
Roller support arms (34), (3) that support 8), (28)
5) and swinging up and down to drive the roller support arm (3
4) and (35) are constituted by rocking drive arms (24) and (24) for switching and operating between the working posture for maintaining the folded state and the non-acting posture for retracting to the standby position. The wrapping roller (28) of the wrapping tool (20), (21),
The roller support arms (34) and (35) are configured so that the article (C) is elastically biased toward the armpit (28),
Moreover, the pair of wrapping tools (20) and (21) arranged at the positions facing each other have the pair of wrapping tools (20) and (21).
One of the two ends of the wrapping sheet (5) is held at a position where one end (5c) of the wrapping sheet (5) is folded over the article to be packaged (C), and the other is the other one of the wrapping sheet (5). Side edge (5d)
While folding back, the one wrapping tool (20) advances so as to switch to the folding operation position, and the one wrapping tool (20) synchronously operates so as to retreat to the non-acting posture with the progress. A packaging device configured to do so.