JPH0532215A - Packaging machine - Google Patents

Abstract

PURPOSE:To provide a packaging machine capable of improving the working efficiency corresponding to the sizes of agricultural products to be packaged. CONSTITUTION:A packaging machine includes a holding device 10 and two or more enveloping devices. An agricultural product C to be packaged is placed on a packaging sheet from above, and the holding device 10 holds the product C from under the packaging sheet and is changeable in its pose in two ways; open pose at which the product C is placed, and action pose at which the product C is held in the holding device 10. The enveloping devices guide the sides of packaging sheet in turn so as to cover the product C with the packaging sheet. The holding device 10 is detachably mounted on a support member 32 and provided with cam members 25 which bring driving cams 26 mounted on the supporting member into contact with the holding device 10 so that changeover between open and action poses of the holding device 10 is performed.

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. A crop holding device for holding the packaged crop from the lower side of the packaging sheet is provided so as to be switchable between an open position for placing the crop and an operating position for holding and holding the lateral side portion of the packaged crop. In this state, the present invention relates to a packaging device provided with a plurality of wrapping tools that sequentially guide the side edges of the packaging sheet onto the crop to be packaged.

[0002]

2. Description of the Related Art In the above packaging apparatus, conventionally, as proposed by the applicant in Japanese Patent Application No. 1-291626, the central tray of the crop holding apparatus is attached to a supporting frame in a fixed position. , A plurality of plate-shaped holding plates that are swingably connected to a receiving pan in an open position and an operating position, and each holding plate swings up and down via a member that slides up and down by an electric motor and a bending link. There was one that was driven.

[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, the crop holding device is detachably locked and coupled to a support member, and a drive provided on the support member side. The crop holding device is provided with a cam member which is brought into contact with the cam and is operated to switch between the open position and the working position.

[0005]

[Action] A crop which is wrapped around the outer peripheral surface of the packaged crop to hold the packaged crop during the wrapping operation of sequentially covering and guiding the wrapping sheet by the plurality of wrapping tools on the packaged crop. Since the holding device is detachably installed,
Depending on the shape of the packaged crop, by exchanging the crop holding device with a different type of shape, it is possible to always set an appropriate holding state even when the shape of the packaged crop is significantly different. . Further, since it is attached and detached by the locking connection structure, and the drive linkage mechanism for holding and holding operation is the cam type contact mechanism, there is no need to change the linkage mechanism when exchanging. The replacement work can be easily performed.

[0006]

According to the present invention, therefore, only the crop holding device needs to be replaced according to the size of the crop, and it is not necessary to prepare a plurality of types of the entire device, and the minimum number of members can be replaced. Moreover, the attachment / detachment work can be easily performed without any trouble, and the work efficiency can be improved.

[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 outwardly with respect to the central holding plate 20b with respect to the packaged crop C. A drive arm 22 that is attached via a spring hinge 21 that urges open swinging toward each other, and that abuts and moves the holding plates 20a and 20c on both sides of each of the left and right holders 30 and 30 toward the packaged crop side. Is provided. More specifically, the saucer 29 is fixed to the upper end of a support shaft 32 (an example of a support member) standing upright from the frame, and a dogleg-shaped support arm 23 is formed on the base end side of the drive arm 22 formed in a U shape. One end of the support arm 23 is connected to the support part 24 extending from the tray 29 in the middle of the support arm 23 so as to be swingable around the horizontal axis, and the cam member 25 is attached to the other end of the support arm 23. It is installed. The cam member 25 is a slide cam 26 that is fitted onto the support shaft 32 so as to be slidable in the vertical direction.
It is configured to abut (an example of a drive cam) 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. And the drive arm 2
The contact restricting portion 28 is configured so that the base end of the second supporting member 20 contacts the upper surface of the supporting member 27 and prevents the central holding plate 20b from moving inward by the urging force of the spring hinge 21. is there.
The slide cam 26 is linked so as to be driven by an electric motor M together with the third pressing tool 9 and the fourth pressing tool 10. Further, the holder 30 is attached to the upper edge of the central holding plate 20b.
A round bar member 33 extending to both ends of is fixedly attached.

The crop holding device 10 includes the support shaft 3
It is detachably engaged with and connected to 2. That is, the support shaft 32 is formed in a tubular shape, and the receiving tray 2 is provided inside the support shaft 32.
The shaft member 33 fixed below 9 is fitted in and inserted into the support shaft 3
The coil spring 34 is internally provided inside the shaft member 33.
And the left and right locking pins 35 projecting laterally outward in the middle of the shaft member 33 are moved upward in the locking recess 36 formed at the upper end of the support shaft 32. It is configured so that it can be inserted and locked toward and held in position. Further, the locking recess 36 is formed to be vertically long, and the crop holding device 10 can be vertically moved in a predetermined stroke by pushing down the crop holding device 10 against the biasing force of the coil spring 34. A limit switch SW (an example of detection means) for detecting that the crop holding device 10 has dropped to the lower position is provided on the upper side, and the limit switch SW acts as a start switch for starting the operation of each of the wrapping tools. Configured.

A work table 31 is provided between the wrapping tools.
A plurality of air blowing nozzles 37 are provided so as to project obliquely upward from the packaging sheet 1 by each wrapping tool.
The sheet 1 is prevented from bending and projecting at the intermediate portion during the wrapping operation of the above.
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, with the supply operation of the packaged crop C, the crop holding device 10 is lowered downward against the spring force of the coil spring 34, and the limit switch SW
Is activated, the electric motor M for driving the wrapping tool is activated, and the side end portion of the wrapping sheet 1 is sequentially covered and guided from the first wrapping tool 11a over the packaged crop C. 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 crop holding device.

FIG. 3 is a plan view of the crop holding device.

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 25 Cam member 26 Drive cam 32 Support member SW detection means

Claims (2)

[Claims] 1. A crop holding device (10) for holding a packaged crop placed from the upper side of the packaging sheet (1) from the lower side of the packaging sheet (1), and an open posture for placing the crop. And a side posture of the packaged crop, which is provided so as to be capable of being held and held, and in the state where it is held, the side ends of the packaging sheet (1) are sequentially covered and guided to the packaged crop. A packaging device provided with a plurality of wrapping devices, wherein the crop holding device (10) is detachably locked and coupled to a support member (32), and a drive cam (26) provided on the support member side. The packaging device in which the crop holding device (10) is provided with a cam member (25) which is brought into contact with the crop holding device (25) for switching between the open position and the working position. 2. The crop holding device (10) is supported by the support member (32) with a predetermined stroke so as to be vertically movable and upwardly biased, and the crop holding device (10) is lowered to a lower position. 2. The packaging device according to claim 1, further comprising a detection means (SW) for detecting the fact that the respective wrapping tools are activated in response to the detection operation of the detection means (SW).