JP2695307B2 - Packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for packaging lettuce and other crops to be packaged such as spherical vegetables with a packaging sheet. And a packaging work unit for wrapping a packaged crop with a sheet for use, sucking an end of the packaging sheet to be stored on the side of the packaging work table, and the work table of the packaging work unit from the sheet storage unit. The present invention relates to a packaging device provided with a sheet feeding mechanism for feeding the packaging sheets one by one.

[0002]

2. Description of the Related Art As a conventional packaging apparatus, there is one having a structure proposed by the present applicant in Japanese Patent Application No. 2-262354. That is, a pair of left and right suction nozzles is provided so as to be vertically swingable and laterally movable, and the suction nozzles are configured to suck the packaging sheet and move upward and backward, and then blow out air from the front.

[0003]

In the above-mentioned conventional structure, since this type of packaging sheet is made of a thin synthetic resin material, when a large number of sheets are stacked and stored, static electricity or moisture causes It is often the case that they stick to each other, and it is difficult to reliably feed each piece of paper by simply using the suction action from the top side. By this, the separation can be performed in the entire area of the sheet. However, according to the above-mentioned conventional structure, after the suction nozzle sucks the sheet, the suction nozzle moves upward while swinging upward, so that the rear side of the lifted sheet remains on the front side while being attached to the remaining sheet. Only one part of it will turn up. As a result, even if air is blown from the front side in such a state, the lifted diagonal seat part acts like an air blocking wall, and this part receives the wind and the wind moves laterally outward. There is a possibility that it may flow out, the sheet separating action may not be effective, and there was room for improvement.

An object of the present invention is to eliminate the above problems.

[0005]

A characteristic configuration of the present invention comprises a sheet storage section for stacking and storing packaging sheets, and a packaging operation section for performing a wrapping operation of a packaged crop with the packaging sheets. A sheet supply mechanism is provided which sucks the end of the packaging sheet on the side of the packaging work unit and supplies the packaging sheet one by one from the sheet storage unit to the workbench of the packaging work unit. In the packaging device, the sheet suction nozzle in the sheet supply mechanism is configured to reciprocate in the direction along the sheet surface after adsorbing the packaging sheet and moving it upward, and the sheet suction nozzle An air jet nozzle that blows air toward the inner back side is provided below the suction packaging sheet after the reciprocating movement, and before the air is jetted from this air jet nozzle, the suction packaging sheet Nozzle moving means for moving the sheet suction nozzle in the extending direction is provided, and the sheet suction nozzle is moved after the air jetting from the air jetting nozzle to supply the suction packaging sheet to the packaging working unit. There is a point.

[0006]

The sheet suction nozzle sucks the packaging sheet and moves upward, and then reciprocates in the direction along the sheet surface. Therefore, the adsorption packaging sheet moves along the sheet surface direction with respect to the packaging sheet remaining below. Due to the relative displacement, the suction packaging sheet and the remaining packaging sheet can be separated. Moreover, since the packaging sheet is moved in the extension direction by the nozzle moving means after the sheet suction nozzle is reciprocated and separated, the portion of the packaging sheet that is lifted upward is in a tension state, and is in a straight line state without slack. In this state, air is supplied from the air ejection nozzle to the lower side of the suction packaging sheet toward the inner back side, so that it is easy for the air to enter the inner space between the packaging sheets, making it easier for suction packaging. The separation performance of the sheet is improved.
Moreover, air is blown between the packaging sheets to separate them, and then the sheet adsorption nozzle is moved as it is to supply the adsorption packaging sheet to the packaging working unit. When the sheet is supplied to the packaging sheet, the process from taking out the packaging sheet to feeding it to the packaging work unit can be performed by a series of operations of the sheet suction nozzle, and the operation of handing over the sheet on the way is unnecessary.

[0007]

Therefore, even when the up-and-down drive of the sheet suction nozzle is provided by, for example, an oscillating type having a simple drive structure, the reciprocating movement of the sheet suction nozzle and the blowing of air can be performed by only making a simple improvement. The function of separating the adsorption packaging sheet can be enhanced by the, and the workability can be improved because the packaging sheet can be supplied one by one by the reliable separation, and moreover, from the removal of the packaging sheet to the packaging. The sheet can be supplied to the working unit simply by moving the sheet suction nozzle, so that the structure of the sheet supply mechanism can be simplified and the supply can be ensured.

[0008]

Embodiments will be described below with reference to the drawings. FIG. 7 and FIG. 8 show a packaging device for wrapping and packaging a packaged crop C such as lettuce and other spherical vegetables with a packaging sheet 1. This packaging device is equipped with three packaging sheets 1
A sheet storage unit 3 to be stacked and stored in each storage case 2, a packaging sheet 1 supplied one by one from the sheet storage unit 3 is placed, and a packaged crop C placed from above is wrapped. There is provided a packaging work unit 4 for performing work, and a sheet feeding mechanism 5 for feeding the packaging sheets 1 from the sheet storage unit 3 to the working unit 4 one by one, and 4 of the packaging sheets 1 fed to the working unit 4. Sheet pressing tools 6, 7, 8, 9 for pressing and holding the corner ends, and a crop holding device 1 for holding and holding the packaged crop C placed and supplied from above the packaging sheet 1.
0, four wrapping tools 11a, 1 that sequentially cover the side edges of the packaging sheet 1 along the outer peripheral surface of the packaged crop C
1b, 11c, 11d, Packaged crop C during wrapping operation
The pressing device 12 for pressing the
A tape feeding device 13 and the like for feeding and supplying an adhesive tape t for adhering and fixing the sheet end portion by a predetermined length are provided.

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. More specifically, in the sheet feeding mechanism 5, the upper portions of the left and right side plate frames 41, 41 are connected by a rod 42, and each side plate frame 41 is driven by a chain-type slide drive mechanism 43 driven by an electric motor M that can freely rotate forward and backward. , 41 are provided so as to be laterally slidable from the sheet storage section 3 to the working section 4, and
A U-shaped support arm 44 is provided so as to be swingable around the horizontal axis X across the side plate frames 41. The support arm 44 is configured to vertically swing by a forward / reverse electric motor M fixedly attached to the side plate frame 41 on one side, and the suction nozzles 14 are attached to the support arm 44. Each of the electric motors M is configured to be drive-controlled by the control device 48. Each suction nozzle 1
No. 4 is configured to suck air by a suction device (not shown) through the pipe 45 and suck the sheet by negative pressure. Further, between the sheet storage section 3 and the working section 4, an air ejection nozzle 46 for injecting air toward the inner back side is provided below the adsorbed sheet. The lateral movement position of the sheet feeding mechanism 5 is detected by a potentiometer PM provided on the shaft core of the drive side chain winding wheel body, and the lower swing limit position is a vacuum switch (not shown) interposed in the air suction system. Is determined by detecting the adsorption state.

As shown in FIGS. 5 and 6, 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 FIG. 3, the crop holding device 10 is composed of a tray 29 arranged in the central portion and holders 30, 30 arranged on the left and right sides of the tray 29, and has an open posture for placing the crop. And the action posture of hugging and holding the lateral side portion of the packaged crop C, and in the state where the packaged article C is held, each of the wrapping tools sequentially moves the side end portion of the packaging sheet 1 into the packaged crop. It is configured to cover and guide 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. More specifically, the receiving tray 29 is fixedly attached to the upper end of a support shaft 32 provided upright from the frame, and is rotated relative to a bracket 34 provided on the receiving tray 29 in the middle of a support arm 33 extending from each holder 30. A cam follower 35 is provided at the tip of the support arm 33, and the cam follower 35 is configured to come into contact with a slide cam 36 that is fitted on the support shaft 32 so as to be slidable relative thereto so as to drive and swing. is there. The slide cam 36 has a third
The pressing tool 8 and the fourth pressing tool 9 are linked so as to be driven up and down by an electric motor M for driving.

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. When the wrapping sheet 1 is wrapped by the respective wrapping devices, the sheet 1 is bent at an intermediate portion. It is designed to prevent it from protruding and protruding. or,
The lower end positions of both sides of each of the holders 30 and 30 are extended and projected downward, and are configured to supplementarily prevent the above-mentioned protrusion of the seat 1.

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. More specifically, as shown in the figure, when a sheet supply switch (not shown) is actuated, the suction nozzle 14 at the standby position swings downward to adsorb the sheet 1 and then lifts it slightly upward (see FIG. 1 (a) and (b)]. Then, after a few reciprocal movements in the front-rear direction [see FIG. 1 (c)], it stops at the rear position and oscillates up and down several times [see FIG. 2 (a)]. In this way, the sticking between the sheets is peeled off to separate the front side. Next, the suction nozzle 14 is slightly moved to the lower side in the sheet supply direction, air is ejected from the air ejection nozzle 46 [see FIG. 2B], and the sheet rear side is separated. Then, the suction nozzle 14 is moved laterally toward the working unit 4 and is swung upwards and upwards (see FIG. 2C). At this time, the timing is set such that the maximum ascending position is reached in the vicinity of the intermediate position of the lateral movement, so that the downward bending of the corner portion of the seat is prevented.
The timing control described above is performed by the control device 48, and the control device 48, the potentiometer PM, the electric motor M, and the like move the sheet suction nozzle 14 slightly in the supply direction before the air ejection nozzle 46 ejects air. Constitutes a means. When the sheet supply is completed, the sheet pressing members 6, 7, 8 and 9 simultaneously press and hold the sheet end portions. Next, the packaged crop C is artificially put into the crop holding device 10 in the central portion from above the packaging sheet 1 thus pressed and held. At this time, when the packaged crop C is dropped and guided into the above-mentioned drop space, the sliding contact resistance between the packaging sheet 1 whose corners are held by the pressing tools 6 to 9 and the packaged crop C. Thus, the lower side of the packaged crop C is wrapped in the sheet 1 in a tensioned state. And the first wrapping tool 11a
The side edges of the packaging sheet 1 are sequentially covered from above to 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.

In the claims, the reference numerals are used to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a diagram showing a procedure of a sheet feeding operation.

FIG. 2 is a diagram showing a procedure of sheet feeding operation.

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

FIG. 4 is a drive system diagram of the sheet retainer.

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

FIG. 6 is a side view of the wrapping tool.

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

FIG. 8 is a side view of the packaging device.

[Explanation of symbols]

 1 Packaging Sheet 3 Sheet Storage Section 4 Packaging Working Section 5 Sheet Supply Mechanism 14 Sheet Adsorption Nozzle 31 Working Table 46 Air Jet Nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Satoshi Ito 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Works (56) References: 52-17226 (JP, U) 4020 (JP, U)

Claims (1)

(57) [Claims] 1. A sheet storage unit (3) for stacking and storing a packaging sheet (1), and a packaging operation unit (4) for wrapping a packaged crop with the packaging sheet (1). The end of the packaging sheet (1) on the side of the packaging work section (4) is adsorbed, and the sheet storage section (3) is directed toward the workbench (31) of the packaging work section (4). 1
A packaging device provided with a sheet feeding mechanism (5) for feeding the packaging sheets (1) one by one, wherein a sheet suction nozzle (14) in the sheet feeding mechanism (5) sucks the packaging sheets (1). And then move upwards, then sheet adsorption
The nozzle (14) is reciprocated in the direction along the seat surface.
And the reciprocating movement of the sheet suction nozzle (14)
An air jet nozzle (46) for blowing air toward the inner back side is provided below the adsorption packaging sheet (1) after the movement ,
Intake before air injection from the air injection nozzle (46)
The sheet-sucking sheet (1) is sucked in the direction of extension.
Nozzle moving means for moving the landing nozzle (14) is provided,
After air ejection from the air ejection nozzle (46)
The packaging work section by moving the sheet suction nozzle (14)
Structure for supplying adsorption packaging sheet (1) to (4)
To Aru packaging device.