JPH0532214A - Packaging machine - Google Patents

Abstract

PURPOSE:To provide a packaging machine capable of performing packaging work of an item to be packaged with a sheet without a slack on the sheet and a damage on the item to be packaged. CONSTITUTION:A holding device 10 holds an item C to be packaged with a receiving pan 29 at the center and holders 30 on the left and right sides, and is changeable in its pose in two ways; open pose at which the item C to be packaged is accommodated, and action pose at which the item C is held in holders 30 from the sides. The holders 30 consist of three holding plates 20a, 20b and 20c that are lined on the left and right sides and pivoted free to swing relatively, and the holding plates 20a and 20c are provided with actuating devices so that they are enforced to swing open outward the item C relatively to the holding plate 20b at the center. A driving mechanism is provided to move the holding plates 20a and 20c on both sides of the left and right holders 30 toward the item C and bring them in contact with the item C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging device for packaging a packaged product such as lettuce and other spherical vegetables with a packaging sheet, and more specifically, a packaging device placed from above the packaging sheet. The crop holding device that holds the packaged crop from the lower side of the packaging sheet by the saucer at the center and the left and right holders has an open posture for placing the crop and an action posture for holding and holding the lateral side portion of the packaged crop. The present invention relates to a wrapping device provided with a plurality of wrapping tools for sequentially guiding and covering the side end portions of a wrapping sheet over a crop to be packaged in a state where the wrapping sheet is held in a held state.

[0002]

2. Description of the Related Art Conventionally, in the above packaging apparatus, each of the above-mentioned holders is provided in a plate-shaped integral structure as proposed by the present applicant in Japanese Patent Application No. 1-291626, and the holders are There has been a structure in which an electric motor is vertically rocked through a member that slides up and down and a bending link.

[0003]

However, in the above-mentioned conventional structure, since the vertical swing range of the holder is constant, the shape and size of the crop to be packaged depends on the growth situation and the type of crop. If they are different from each other, they may be held too strongly, or the holding operation may be insufficient, resulting in damage to crops or loosening of the packaging sheet after the wrapping operation, and there is still room for improvement. there were. The present invention aims to eliminate the above-mentioned problems.

[0004]

According to a characteristic configuration of the present invention, in the packaging apparatus described at the beginning, each of the holders is pivotally supported by three holding plates arranged side by side so as to be relatively swingable. A connecting means is provided, and the holding plates on both sides are provided with biasing means for biasing the central holding plate toward the outer side relative to the crop to be packaged, and A point is that a drive mechanism is provided for moving the holding plates on both sides of each of the left and right holders toward and away from the crop to be packaged.

[0005]

After the packaged crop is placed on the pan in the open position, the left and right holders hold and hold the packaged crop from both left and right sides. When the holding plate is moved to the packaged crop side by the drive mechanism in the abutting state, first, the central holding plate comes into contact with the packaged crop, and when it is further driven, the left and right holding plates that are open-biased are the biasing means. Against the urging force of (1), it swings close to a posture along the outer peripheral surface of the packaged crop and switches to the action posture.
Then, each wrapping tool sequentially performs the wrapping operation of the wrapping sheet while maintaining the holding state.

[0006]

As a result, even when the shapes of the packaged crops are different, in the working attitude, since the holding plates are always in the attitude along the outer peripheral surface of the packaged crop, the packaging sheet is loose. In the absence of the product, the product was in close contact with the packaged crop, and it was possible to obtain a product with a good packaging finish with little slack. Further, since the central holding plate that first comes into contact with the packaged crop is not directly driven and is held via the biasing force of the biasing means, a strong pressing force is not applied to the packaged crop, Less likely to cause damage. Moreover, since the urging force of the urging means always acts during the sheet covering guide operation by each of the wrapping devices, the sheet can be surely held and the sheet is not loosened.

[0007]

Embodiments will be described below with reference to the drawings. FIG. 6 and FIG. 7 show a packaging device for wrapping a packaged crop C such as lettuce and other spherical vegetables with the packaging sheet 1 for packaging. This packaging apparatus mounts a plurality of packaging sheets 1 in three storage cases 2 having different sizes, and stores a sheet storage section 3 and the packaging sheets 1 supplied from the sheet storage section 3 one by one. The sheet supply unit 1 is provided with a working unit 4 for wrapping the packaged crop C placed from above, and supplies the packaging sheets 1 from the sheet storage unit 3 to the working unit 4 one by one. Mechanism 5, sheet pressing tools 6, 7, 8, 9 for pressing and holding the four corners of the packaging sheet 1 supplied to the working unit 4, and the packaged product C placed and supplied from above the packaging sheet 1 Crop holding device 10 for hugging and holding, and four wrapping tools 1 for sequentially covering and guiding the side edges of the packaging sheet 1 along the outer peripheral surface of the packaged crop C.
1a, 11b, 11c, 11d, a crop holding device 12 that presses the packaged crop C from above during the wrapping operation, and a tape feeding device that feeds the adhesive tape t for adhering and fixing the sheet end portion by a predetermined length after the wrapping operation Thirteen
And so on.

The sheet supply mechanism 5 includes a sheet storage section 3
And a pair of left and right sheet suction nozzles 14 provided so as to straddle the upper part of the sheet stacker. The suction nozzles 14 are configured to be vertically swingable and slidably movable between the sheet storage section 3 and the working section 4, 1 is supplied to the working unit 4 one by one.

As shown in FIGS. 4 and 5, each of the wrapping devices supports a sheet guiding roller 16 at the tip of a supporting arm 15 bent in an arc shape and has a cam roller 17 at the other end. A swing arm 18, which is swing-driven in a predetermined range by driving the forward / reverse electric motor M, is pivotally connected to a middle portion thereof. Then, by driving the electric motor M, the cam roller 17 is guided by the arcuate cam surface 19, and the guide roller 16 at the tip end covers and guides the packaging sheet 1 substantially along the outer peripheral surface of the packaged food C. It is configured as follows. The guide roller 16 is urged to swing toward the packaged crop C by swinging.

As shown in FIGS. 1 to 3, the crop holding device 10 is composed of a saucer 29 arranged at the center and holders 30, 30 arranged on the left and right sides of the saucer 29. The open posture and the action posture for holding and holding the lateral side portion of the packaged crop C are switchably provided, and in the held state, the respective wrapping tools sequentially move the side end portions of the packaging sheet 1, It is configured to cover and guide the packaged crop C.
In the open position, the holders 30, 30 are set so as to be diagonally lower than the work table 31 to form a space for dropping the packaged crop C, and the holders 30, 30 are also set. While holding the crop C to be packaged via the packaging sheet 1, it is clamped and held to set the working posture. Then, each of the holders 30,
30 of the three holding plates 20a arranged side by side,
20b and 20c are pivotally connected to each other so that they can swing relative to each other, and the holding plates 20a and 20c on both sides are relatively outward with respect to the packaged crop C relative to the central holding plate 20b. It is attached via a spring hinge 21 (an example of a biasing means) that biases open swinging toward each other, and the holding plates 20a, 20c on both sides of each of the left and right holders 30, 30 are directed toward the packaged crop side. A drive arm 22 (an example of a drive mechanism) for abutting movement is provided. More specifically, the tray 29 is fixed to the upper end of a support shaft 32 standing upright from the frame, and one end of a dogleg shaped support arm 23 is connected to the base end side of the U-shaped drive arm 22. A midway portion of the support arm 23 is pivotally supported by a support portion 24 extending from a tray 29 so as to be swingable around a horizontal axis, and a cam follower 25 is attached to the other end portion of the support arm 23. The cam follower 25 is configured to abut on a slide cam 26 that is fitted onto a support shaft 32 so as to be slidable in the vertical direction and swing outward. A support tool 27 fixedly connected to the central holding plate 20b is pivotally supported about the same pivot axis as the pivot axis of the support arm 23. Then, the base end portion of the drive arm 22 is brought into contact with the upper surface of the support member 27 so that the central holding plate 20b is prevented from moving inward by the urging force of the spring hinge 21. Is configured. The slide cam 26 is linked so as to be driven by an electric motor M together with the third pressing tool 8 and the fourth pressing tool 9. A round bar member 33 extending to both ends of the holder 30 is fixedly attached to the upper edge of the central holding plate 20b.

As shown in FIG. 6, a plurality of air blowing nozzles 37 are provided between the respective wrapping devices so as to project obliquely upward from the work table 31, and when the wrapping operation of the wrapping sheet 1 is performed by the respective wrapping devices, The sheet 1 is prevented from bending and projecting at the intermediate portion and protruding. Further, the lower end positions of both side portions of each of the holders 30 and 30 are extended and projected downward, so that the above-mentioned protrusion of the seat 1 is auxiliary prevented.

The operation procedure of the packaging device having the above-mentioned configuration will be described. First, the sheet feeding mechanism 5 sucks one sheet 1 for packaging and moves and feeds it to the working unit 4. Then, when the sheet supply is completed, each of the sheet pressing members 6, 7, 8, 9 simultaneously presses and holds the sheet end portion.
Next, the packaged crop C is placed on the crop holding device 10 in the central portion from above the packaging sheet 1 thus pressed and held.
Artificially insert. At this time, when the packaged crop C is guided by being dropped into the above-described drop space, the sheet 1 is wrapped by the sliding contact resistance between the packaging sheet 1 whose corners are held by the rollers 22 and the packaged crop C. Wraps the lower part of the crop C to be packaged in a state of being strained. At this time, the round bar member 33 protects the wrapping sheet 1 from tearing at the upper edge of the holder 30 due to the tension force due to the sliding contact resistance. Then, the left and right holders 30, 30 tighten the crop to be packaged. At this time, as shown in FIG. 3A, first, the central holding plate 20b elastically abuts, and the left and right holding plates 20a and 20c are gradually guided along the outer peripheral surface (see FIG. )reference). Then, the first wrapping tool 11
The side edge of the packaging sheet 1 is sequentially covered from a to cover and guide the crop C to be packaged. Then, after the last wrapping tool 11d is covered and guided, the wrapping sheet 1 is adhesively fixed by the adhesive tape t, and the work is completed.

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

[Brief description of drawings]

FIG. 1 is a side view of a crop holding device.

FIG. 2 is a side view of the holder.

FIG. 3 is a plan view showing the operation of the holder.

FIG. 4 is a side view of the wrapping tool.

FIG. 5 is a side view of the wrapping tool.

FIG. 6 is a plan view of the packaging device.

FIG. 7 is a side view of the packaging device.

[Explanation of symbols]

1 Packaging sheet 10 Crop holding device 20a, 20b, 20c holding plate 21 Biasing means 22 Drive mechanism 24 Support 27 Support 28 Service Control Department 29 saucer 30,30 holder

Claims (3)

[Claims] 1. A packing tray (29) in the central portion and left and right holders (30), (3) from the lower side of the packaging sheet (1) for the packaged crop placed from the upper side of the packaging sheet (1). 30)
The crop holding device (10) for holding the crop is provided so as to be switchable between an open posture for placing the crop and an action posture for holding and holding the lateral side portion of the packaged crop. A packaging device provided with a plurality of wrapping tools for sequentially covering the side edges of a sheet (1) with a crop to be packaged and arranging the holding tools (30) and (30) on the left and right respectively. The three holding plates (20a), (20b),
(20c) is pivotally connected so as to be relatively swingable, and the holding plates (20a) and (20c) on both sides are relative to the central holding plate (20b) relative to the packaged crop. Is provided with an urging means (21) for oscillating openly toward the outside, and the holding plates (20a), (20c) on both sides of the left and right holders (30), (30) are provided. A packaging device provided with a drive mechanism (22) for contacting and moving toward the packaged crop. 2. The drive mechanism (22) is swingably supported around a horizontal axis with respect to a support portion (24) of the tray (29) and is connected to the central holding plate (20b). 2. The packaging device according to claim 1, wherein the fixed supporting member (27) is pivotally supported on the supporting portion (24) of the tray (29) so as to be swingable about a horizontal axis. 3. The drive mechanism (22) and the support (2)
7) and the holding plates (20a), (20b),
The packaging device according to claim 1 or 2, further comprising an abutment restricting portion (28) for restricting a posture change due to the relative biasing force of (20c).