JP2984032B2 - Packing equipment for bulk packages - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a packaging device for a lump package, and more particularly to a packaging device for a lump package that is suitable for packaging head vegetables such as lettuce.

(Prior Art) Conventionally, as a packaging device for head vegetables such as lettuce, for example, a vegetable receiver for receiving head vegetables from a guide hole is provided below a support plate having a guide hole, and above the vegetable receiver. A film squeezing mechanism that squeezes the film for packaging is provided in the section,
A film made of a synthetic resin is stretched on the support plate, head vegetables are supplied downward through a guide hole onto a vegetable receiver through the film, and the head is squeezed by a film squeezing mechanism to package the head vegetables. A structure in which the film is heat-sealed has been proposed.

(Problem to be Solved by the Invention) The film aperture mechanism having the above-described configuration has a pair of aperture plates having a semicircular or V-shaped aperture recess at opposite edge portions, and brings the aperture plates closer together. Thus, the end of the film wrapping the head vegetables is narrowed down by the narrowing recess. Then, the film portion between the film portion narrowed down by the diaphragm plate and the top portion of the head vegetables is heat-sealed by a heater.

Therefore, the vegetables to be supplied on the vegetable receiver must be set so that the top is located immediately below the heat sealing portion.

Vegetables to be packed vary in size,
Conventionally, the vegetable receiver is moved up and down with a screw rod, etc., and a detection sensor is provided on the side of the vegetable receiver, and when the top of the vegetable reaches the heat seal position by the detection sensor, the screw rod is stopped. I was trying to make it.

However, in this conventional device, a detection error by the detection sensor is inevitable because the film end portion is interposed between the detection sensor and the vegetables, and a time lag until the screw rod is stopped after detection by the detection sensor, It was extremely difficult to reliably hold the vegetables in place.

Therefore, the heat sealing position is separated from the vegetables, so that good-looking packaging cannot be performed, and conversely, the top of the vegetables is sandwiched by the heater.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method for packaging a massive package that can reliably supply a package to a predetermined height position and can reliably bind a film. In providing the device.

(Means for Solving the Problems) A packaging device for a bulk package according to the present invention is provided so as to allow a bulk package to pass therethrough, and supports a film for packaging the package at a site where the package passes. Receiving a package, which is disposed below the film supported by the film support and is supplied from above the film, via a film drawn in by the supplied package. Between the body and the film supporting portion and the receiver, and are provided so as to be movable toward and away from each other with the space above the receiver interposed therebetween. In a packaging device for a mass package comprising a film binding portion having a pair of squeezing members for squeezing a film end extending above the packaged product, the receiver is supported on a base so as to be vertically movable, Raise the receiver An urging means for urging in the direction, a stopper mechanism for allowing downward movement of the receiver and prohibiting upward movement, and a releasing means for canceling the upward movement inhibition of the receiver of the stopper mechanism are provided. Above the film supported by the film supporting portion, the lower end is vertically movable so as to be able to enter the film binding portion, and presses the package together with the receiver to the film binding position against the urging force of the urging means. After the upward movement of the pressing body, the stopper mechanism wraps the package remaining at the film binding position.

It is preferable to provide the pressing body with a stopper for stopping the downward movement of the pressing body when the lower end of the pressing body is pressed into the film binding position. In this case, it is more preferable that the spacer is detachably provided at the lower end of the pressing body.

Further, the receiving body is supported on the base by a support rod so as to be vertically movable, the stopper mechanism is supported at one end by the base so as to be swingable, and a latch plate having a hole into which the support rod is loosely inserted, and It is preferable to constitute a universal key mechanism provided with a spring for urging the latch plate upward and latching the support rod at the edge of the hole of the latch plate.

Further, it is preferable that a film pressing member made of a stretchable material having a weak elasticity that does not allow the package received by the receiver to float on the edge of the receiver.

(Operation) While pulling down the center of the film from above the film supported by the film support, the package such as head vegetables is supplied onto the receiver. The top of the package is pressed by the pressing body, and the package is pushed downward together with the receiver against the urging force of the urging means so that the top of the package is located immediately below the binding portion at the film binding portion. . In this case, if a stopper is provided on the pressing body, the top of the package is automatically positioned immediately below the binding portion by pressing the pressing body down to a position where the stopper comes into contact with the base or the like. Further, by appropriately attaching a spacer to the lower end of the pressing body, the amount of pressing down of the package can be adjusted, and the binding position can be adjusted optimally according to the package.

When the package is pushed down by the pressing body, the film is pressed and adhered to the lower surface of the package by the elastic force of the film pressing body by providing an elastic film pressing member at the edge of the receiver.

The pressing body is moved upward. Even if the pressing body is moved upward, the receiving body is prohibited from moving upward by a stopper mechanism such as a free key mechanism, so that the package maintains a predetermined height position.

A pair of squeezing members of the film binding unit are driven in the approaching direction by an appropriate driving unit, and the film ends are squeezed,
The narrowed film portion is bound by a heater or the like.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

 FIG. 1 shows a side view of the packaging device.

Reference numeral 10 denotes a film support unit, 12 denotes a pushing unit, 14 denotes a film binding unit, 16 denotes a bucket support unit (FIG. 2), 18 denotes a driving unit, and 20 denotes a discharge unit.

First, the film binding unit 14 will be described with reference to FIGS.

As clearly shown in FIG. 2, the film binding portion 14 includes a top plate 27, a pair of upper diaphragm plates (aperture members) 28a, 28
b, a pair of heaters 30a, 30b fixed to a pair of slide bodies 36a, 36b, respectively, and a pair of lower aperture plates (aperture members) 31a, 31b. Further, a pair of horizontal diaphragm plates 32a and 32b are provided at substantially the same height position as the heaters 30a and 30b.

A hole 33 is formed in the center of the top plate 27 so that the package 23 can pass through.
The protruding pieces 34 are protruded from the four sides. The package 23 can pass through the space between the tips of the projecting pieces 34 downward. To be able to deal with packages 23 of various sizes,
The protruding piece 34 is provided so that its protruding length can be adjusted.

The pair of upper diaphragm plates 28a and 28b are provided directly below the top plate 27 so as to be able to move toward and away from each other with the hole 33 of the top plate 27 therebetween. V-shaped narrowing recesses 35a, 35b (FIG. 3) whose bottoms are formed flat over a slight length (about 3 cm) are provided at the opposing portions of the pair of upper diaphragm plates 28a, 28b. When the opposing portions of the upper aperture plates 28a and 28b overlap and are driven in the approaching direction,
Since the space formed by 35a and 35b is narrowed and moved until it becomes a narrow slit shape, the end of the film 21 is narrowed.

The pair of heaters 30a and 30b are fixed to the lower surfaces of the slide bodies 36a and 36b (FIGS. 4 and 5).

Driving force is transmitted from a driving unit described later to the slide bodies 36a and 36b, and in conjunction with the movement of the slide bodies 36a and 36b, a pair of upper diaphragm plates 28 are described later together with the heaters 30a and 30b.
a, 28b, lower diaphragm plates 31a, 31b, and lateral diaphragm plates 32a, 32b are driven.

Slides 36a and 36b are rails fixed on the base respectively
It is guided by 37a and 37b and moves. In FIG. 3, reference numeral 38 denotes a rotating shaft which is reciprocated about an axis when a driving force from a driving unit is transmitted to a sprocket 39 provided at one end.
Sprockets 40a, 40b are fixed on the rotating shaft 38, and chains 42a, 42b are stretched between the sprockets 40a, 40b and the sprockets 41a, 41b disposed on the other side of the base. , One slide body on the lower running part of 42b
36b (FIG. 4), and the other slide body 36a is fixed to the upper running portion (FIG. 5). Therefore, in FIG.
When the clockwise rotation is performed, the slide bodies 36a and 36b move in the approaching direction, and when rotated in the opposite direction, the slide bodies 36a and 36b are moved in the separating direction.

As shown in FIG. 3, one slide body 36b is provided with a long hole 43 long in the moving direction. A pin 44 provided on the lower surface of one upper diaphragm plate 28b fits into the long hole 43, and a coil spring 46 is stretched between the pin 44 and a pin 45 provided on one slide body 36b. Therefore, one upper diaphragm plate 28b is urged leftward in the upper part of FIG. 3 (toward the center of the apparatus) with respect to one slide body 36b, and its movement is restricted by the engagement of the pin 44 with the end of the long hole 43. Have been. Accordingly, the one upper diaphragm plate 28b is connected to the one slide body 36b via the pins 44 and 45 and the coil spring 46, and moves with the movement of the one slide body 36b. Reference numeral 47 denotes a stopper pin. When the upright piece 48 at the end of the one upper diaphragm plate 28b abuts on the head thereof, the movement of the one upper diaphragm plate 28b toward the center of the apparatus is stopped. Note that one of the slide bodies 36b can be further moved toward the center of the apparatus within the range of the elongated hole 43.

The other upper diaphragm plate 28a is provided with a long hole 50 long in the moving direction, and a pin 51 provided on the other slide body 36a is fitted into the long hole 50. A coil spring 53 is stretched between the pin 51 and a pin 52 provided on the other upper drawing plate 28a, thereby forming the other upper drawing plate 28a.
a is urged rightward in FIG. 3 until the pin 51 comes into contact with one end of the long hole 50. Therefore, the other upper diaphragm plate
28a is connected to the other slide body 36a via the pins 51 and 52 and the coil spring 53, and moves with the movement of the slide body 36a. Reference numeral 54 denotes a stopper, which is brought into contact with the end of the other upper diaphragm plate 28a and stops its movement toward the center of the apparatus. Even if the other upper diaphragm plate 28a stops, the other slide body 36a can still move toward the center of the apparatus within the range of the elongated hole 50. Reference numeral 56 denotes a micro switch for stopping a drive motor of a drive unit described later, and the drive motor is stopped by a dog 55 provided on the slide body 28a pressing the micro switch 56.

 Next, the lower diaphragm plates 31a and 31b will be described.

As shown in FIGS. 4 and 5, the lower diaphragm plates 31a and 31b are formed between L-shaped guides 58a and 58b provided on the lower surface of the slide bodies 36a and 36b and members 59a and 59b, respectively. The sliding body 36 is guided by the both edges in the space.
The slide members 36a and 36b are slidably provided in the same direction as the moving direction of the slide members 36a and 36b.

Then, as clearly shown in FIG. 6, the other slide body 36a
A coil spring 61 is stretched between a pin 60 provided on the other side and a protruding portion of the other lower diaphragm plate 31a, and the other lower diaphragm plate 31a lowers on a projection 62 provided on the lower surface of the other slide body 36a. Until the stopper 63 protruding from the upper surface of the diaphragm plate 31a contacts,
It is urged rightward in FIG. At this time, the end of the other lower diaphragm plate 31a on the device center side is set to protrude toward the device center from the heater surface of the heater 30a.

One lower diaphragm plate 31b is also provided for one slide body 36b in the same manner as described above.

64a and 64b are stoppers for the lower diaphragm plates 31a and 31b. Even when the lower diaphragm plates 31a, 31b stop by contacting the stoppers 64a, 64b, the slide bodies 36a, 36b and the heaters 30a, 30b can move forward against the tensile force of the spring 61.

2, 4 and 5, reference numerals 66a and 66b denote squeeze rubbers (elastic strings), which are provided at the distal ends of the slide bodies 36a and 36b on the central side of the apparatus. Squeezing rubber 66a, 66b
Are located substantially parallel to the leading edges of the lower diaphragm plates 31a, 31b and closer to the center of the apparatus than the leading edges, and are also located on the lower diaphragm plates 31a, 31b.
1 is disposed below the lower surface. 67a and 67b are the hanging metal fittings.

 Next, the horizontal aperture plates 32a and 32b will be described.

The horizontal diaphragm plates 32a and 32b are the upper diaphragm plates 28a and 28b and the lower diaphragm plate 31.
The film 21 is squeezed from a direction orthogonal to the squeezing directions of a and 31b. As clearly shown in FIGS. 7 and 8, the base is swingable in a horizontal plane about the shafts 68a and 68b. The rotating arms 70a and 70b are provided at the distal ends of the provided rotating arms 70a and 70b, and when the rotating arms 70a and 70b are rotated in a direction in which both distal ends approach, the film ends are narrowed down from the lateral direction.

Each of the horizontal diaphragm plates 32a and 32b has two horizontal diaphragm plates spaced vertically, and the upper horizontal diaphragm plate is formed to be narrow,
The area just above the heat seal portions of the heaters 30a and 30b is narrowed, and the lower horizontal throttle plate is narrowed immediately below the heaters 30a and 30b. The upper horizontal diaphragm plate is formed to be narrow in order to prevent the heaters 30a and 30b from moving forward due to heat sealing after narrowing by the upper horizontal diaphragm plate.

A toggle mechanism was employed as an example of an opening / closing mechanism for the horizontal diaphragm plates 32a and 32b. That is, as shown in FIGS. 7 and 8,
At the other end of the rotating arms 70a and 70b, links 71a and 7
A movable body having one end of 1b pivotally mounted thereon and the other end of each of the links 71a and 71b slidably provided on a shaft 72 provided on a base.
A shaft 74 is attached to 73. The movable body 73 is normally urged by a spring 75 in a direction in which both ends of the rotating arms 70a and 70b open. One end of a wire 76 is fixed to the movable body 73, and the wire 76 is pulled against the urging force of the spring 75, so that the movable body 73 slides rightward in FIG. , 32b are closed.

Therefore, as described above, when the two slide bodies 36a and 36b move in the approaching direction, the upper diaphragm plates 28a and 28b narrow the upper side of the film end by the narrowing concave portions 35a and 35b, and the lower diaphragm slightly later than this. The plates 31a, 31b narrow down the lower side.

Before the film ends are completely squeezed by the upper and lower squeezing plates, the squeezing rubbers 66a and 66b abut on the upper part of the package 23 with the film 21 interposed therebetween and squeeze the film ends. Further, the horizontal diaphragm plates 32a and 32b are driven as described above, and the film portion being narrowed down by the upper and lower diaphragm plates is narrowed down in the lateral direction, and the length of the narrowed portion is appropriately adjusted.

As described above, the upper and lower diaphragm plates 28 and 31 come into contact with the corresponding stoppers and stop, but the slide bodies 36a and 36b still move to the center of the apparatus, and the upper diaphragm plates 28a and 28b The narrowed portions of the film between the diaphragm plates 31a and 31b and the diaphragm positions are heat-sealed by the heaters 30a and 30b.

 Next, the bucket support 16 will be described.

As clearly shown in FIG. 2, the bucket (receptor) 24 is supported on a support rod 80 which is guided up and down by a base so as to be tiltable in a product receiving box 81 direction.

That is, the bucket 24 is fixed to an upper surface of a rocking body 84 that is provided on a support base 82 fixed to the upper part of the support rod 80 so as to be able to rock around a shaft 83 in the direction of the product receiving box 81. Rocking body
84 is urged by a spring 85 disposed between the support 82 and the pivot 85 so as to rotate about the shaft 83 in the direction opposite to the product receiving box 81, while the rocking body 84 and the support 82 When the other end of each of the links 87 and 88 pivoted by the shaft 86 at one end is pivoted and is urged by the spring 85 to extend the links 87 and 88, the bucket 24 is It is like being horizontal. One link 87 is formed in a U-shape in cross section, and the other link 88 is mounted on a shaft 86 at a position where it enters the end of the one link 87. Even if the weight of 23 is applied, the U-shaped end face is locked to the
7, 88 do not bend, and the bucket 24 maintains a horizontal state. One end of a wire 89 is fixed to one end of the shaft 86 via a spring 96, and the links 87 and 88 are pulled to the right in FIG. And the bucket 24
Will tilt in that direction. The wire 89 is operated by the drive unit 18 as described later. The spring 96 serves as a relief when the wire 89 is pulled too much, preventing damage to each part.

The support rod 80 is pivotally attached to the other end of a lift rod 91 rotatably pivoted at one end to the base via a link 90, and a tension spring 92 is connected to a middle part of the lift rod 91 by being connected thereto. The support rod 80 is always urged to move upward. The tensile force of the tension spring 92 is appropriately adjusted by pulling the wire 93. 94 is the operation handle (FIG. 1).

Reference numeral 95 denotes an air cushion, in which a piston rod of a piston having a valve mechanism is connected to a lift rod 91, and the downward movement of the support rod 80 is free. Even when the force is increased, it acts as a cushion so that it does not move up suddenly.

The vertical movement of the support rod 80 is regulated by a free key mechanism arranged in the middle thereof. That is,
A locking plate 97 slidably provided on one side of the base,
The support rod 80 is inserted through the hole of 98, and each of the retaining plates 97 and 98 is
By being urged in opposite directions by springs 101 and 102 interposed between guide plates 99 and 100 that guide the 80 in a vertically movable manner, the edge of the hole is hooked on the support rod 80,
The downward movement of the support rod 80 is restricted by the latch plate 97, and the upward movement thereof is restricted by the latch plate 98. One ends of wires 103 and 104 are connected to the other ends of the latch plates 97 and 98, and the latch plates are pulled by pulling the wires 103 and 104 against the biasing force of the springs 101 and 102.
The locks of 97 and 98 are released. The wire 103 is operated by driving the pushing unit 12 as described later, and the wire 104 is operated by driving the driving unit 18.

The bucket 24 has a shallow dish shape larger than the package 23 so that the package 23 can handle packages 23 of various sizes. Bucket 24
Is covered with a stretchable net (film pressing body) 107 made of an elastic material. The periphery of the net 107 may be fixed to the edge of the bucket 24, or may simply be stretched so as not to come off the periphery of the bucket 24. In addition, the strength of the elastic force of the net 24
When the net 23 is placed on the net 107, the net 107 has a weak elastic force such that the net 107 is pressed against the inner bottom surface of the bucket 24 by its own weight. In other words, the package 23 is a net having an elastic force such that the package 23 does not float up from the inner bottom surface of the bucket 24 due to the elastic force of the net 107. The film pressing member may be not only a net-like material but also a sheet-like material. In addition,
On the bottom surface inside the bucket 24, even if the package is square and irregular, so that it can be stably placed on the bucket,
A cylindrical receiving portion 108 (FIG. 9) having an open upper surface may be provided. This receiving part 108 is a bucket
4 may be placed in the center, but as clearly shown in FIG.
It is preferable that the bucket 24 be slightly deviated from the center and be inclined so that the deviated side is slightly higher than the other side. In this way, when vegetables such as lettuce are placed on the bucket 24 so that the cut end of the root faces upward, the vegetables also tilt according to the inclination of the upper surface of the receiving portion 108, and the cut end of the root is slightly shifted from the center of the bucket 24. Becomes However, the center of the vegetables is located almost on the center line of the bucket 24. Thereby, the heat-sealed portion of the film is located at a position slightly shifted from the cut of the root, and the cut of the root can be seen from the outside through the film. Vegetables such as lettuce decay from the root cut, but by making the root cut visible from the outside, the reliability of the product can be increased. Note that the receiving portion 108 is not cylindrical, and may be, for example, one in which a plurality of blocks are separately arranged so as to support the lower surface of the vegetable at several places.

 Next, the pushing section 12 will be described.

In FIG. 1, reference numeral 25 denotes a pressing body, which is supported by a support member 110 provided in an L-shape on a base and is provided so as to be vertically movable above a bucket 24. Reference numeral 111 denotes the operation lever, which can manually push the pressing body 25 downward. A stopper 112 is provided on the upper part of the pressing body 25, and the lower end position of the pressing body 25, that is, the lowermost position of the pressing body 25 when the pressing body 25 is pushed in is regulated by the stopper 112 abutting on the upper surface of the support member 110. The position of the stopper 112 can be adjusted freely above the pressing body 25. At the lower end of the pressing body 25, a pad-like spacer 119 (FIG. 15) having an arbitrary thickness is attached.
The lowermost position of the lower end may be adjusted.

The spacer 119 preferably has a Teflon tape adhered to the lower surface of the foam, and is prepared in various thicknesses, and is used by being attached to a plate at the lower end of the pressing body 25 by a clip portion.

On one end of the support member 110, a swinging rod 113 is swingably supported by a shaft 114.
A plurality of pulleys 115 provided on the
And one end of the wire rope 116 is
The other end is fixed to the lower part of the pressing body 25. Rocking rod
A spring 117 is disposed between the 113 and the support member 110,
Further, the free key mechanism (first
The other end of the wire 103 whose one end is connected to the hooking plate 97 of FIG.

Therefore, the pressing body 25 is constantly pulled upward by the spring 117 through the swinging rod 113, the pulley 115, and the wire rope 116 as shown in FIG. Reference numeral 118 denotes a stopper at that time. Pressing body 25 against the tensile force of spring 117
When the rocking rod 113 is pushed down,
It is swung in the counterclockwise direction of rotation of the hand, thereby
Is pulled, the hook of the hook 97 of the free key mechanism comes off,
The support rod 80, and therefore the bucket 24, is in a state where it can move down and cannot move up.

On the surface (the front side in FIG. 1) of the support member 110 opposite to the side on which the swinging rod 113 is provided, an operating rod 121 is provided so as to be swingable about a shaft 120. The operating rod 121 is always in contact with the stopper 122. A magnet 123 is fixed to the end of the operating rod 121, and the upper surface of the magnet 123 is a support member.
Height matches 110 upper surface. Reference numeral 124 denotes a microswitch which is turned on by the operating rod 121 when the operating rod 121 is slightly raised. After the pressing body 25 is pushed into the lowermost position and then the hand is released from the operation handle 111, the pressing body 25 moves upward through the wire rope 116 by the spring 117 as described above. The magnet 123 at the tip of the operating rod 121 attracts the stopper 112 of the pressing body 25, and the tip of the operating rod 121 rotates upward around the shaft 120 with the upward movement of the pressing body 25. 124 is entered. As a result, a driving unit 18 described later is operated. Although the operating rod 121 comes into contact with the stopper 125 and stops moving upward, the pressing body 25 moves away from the attraction of the magnet 123 to the position shown in FIG.

 Next, the film support 10 will be described.

FIG. 10 is a side view and FIG. 11 is a plan view. In the figure, reference numeral 130 denotes a roll support. Two parallel support rollers 132a and 132b on which the roll 22 around which the film 21 is wound are mounted on the rear portion of the roll support table 130. Side rollers 133a, 13 are provided on both sides of the support rollers 132a, 132b.
3b is rotatably erected, and both side rollers 133a, 13
The interval between 3b can be adjusted according to the width of the film. The roll 22 has these two side rollers 133a and 133b.
Placed between. Instead of supporting the roll 22 on a support roller, the roll 22 may be rotatably supported by inserting a support shaft through the center of the roll. The film 21 pulled out from the roll is drawn forward, that is, above the top plate 7, between the guide roller 134 and the film pressing piece 131 and between the upper and lower film pressing members 135 a and 135 b.

The film pressing piece 131 presses the film against the guide roller 134 by the urging force of the spring.

The guide roller 134 and the upper film presser 135
a is attached to an arm member 146 rotatably provided in the front-rear direction by a shaft 137 (FIG. 1), and the upper arm member 146 in FIG. Between the film presser 135a and 135b, and the guide roller 13
A gap is created between 4 and the roll support table 130, and the film 21 can be pulled forward through this gap. 147 is a snap lock for locking the arm member.

The roll support table 130 is fixed on a slide table 136.

An elongated hole 138 is formed in the slide base 136 in the front-rear direction, so that the slide base 136 can be moved back and forth with the roll support base 130 mounted thereon, and its position is adjusted. 139 is a fixing screw.

Reference numeral 140 denotes a film cutting frame provided on a slide base 136 so as to be rotatable in the front-rear direction about a shaft 141. In the front part of the film cutting frame 140, the film pressing bodies 142a, 142
b is provided. Also, at the rear of the film cutting frame 140, upper and lower film retainers 135a, 135b and guide rollers 13 are provided.
4, a cutting blade 143 is provided. The portion having the axis 141 of the film cutting frame 140 is formed in a pipe shape,
The cutting frame 140 to which the film retainers 142a and 142b are fixed
Is provided so as to be slidable with respect to the pipe, and the positions of the film pressing members 142a and 142b in the front-rear direction can be adjusted.

A pull-back spring 145 is stretched between the front end of the film cutting frame 140 and the support member 110.

The film 21 pulled out above the top plate 27 is held with the front end inserted between the film pressing bodies 142a and 142b at the front end of the film cutting frame 140.

If the front side of the film cutting frame 140 is pushed downward around the shaft 141 against the tensile force of the spring 145, the cutting blade 143 rises, and the film between the film pressing members 135a, 135b and the guide roller 134 is raised. Disconnect.

Therefore, the cut film 21 is held by the film pressing members 135a and 135b and the film pressing members 142a and 142b at the front and rear, respectively, and is held in an extended state above the top plate 27.

The cutting length of the film can be determined by adjusting the position of the film retainers 142a and 142b in the front-rear direction. The center of the cut film can be aligned with the center of the apparatus (above the bucket) by moving the slide table 136 in the front-rear direction with respect to the base.

As shown in FIG. 11, the drawing direction of the film 21 is about 45 ° with respect to the moving direction of the above-mentioned upper and lower diaphragm plates (diaphragm members) in the film binding portion 14. Therefore, the upper and lower aperture plates narrow the ears of the film toward the center.

 Next, the driving section 18 will be described with reference to FIG.

The drive unit 18 is arranged on the side of the bucket support unit 16.

Reference numeral 150 denotes an approximately 1/4 arc-shaped crank cam, which is fixed to the output shaft of the drive motor 151 at the center of the arc. A crank pin projects from the front end of the crank cam 150 in the rotation direction.

The base has a tension pulley 153 and a sprocket 1.
A drive chain body 155 having both ends connected to the crank pin 152 extends between the sprocket 39 fixed to the end of the rotating shaft 38 of the binding unit 14, the tension pulley 153, and the sprocket 154. Have been.

The portion of the drive chain 155 that slides on the tension pulley 153 is formed by a spring 171 that applies a predetermined tension to the drive chain 155. Further, a portion of the drive chain body 155 between the sprocket 39 and the crank pin 152 is formed with a spring 172 for increasing initial tension and obtaining driving force.

A pushing roller 156 is provided on a surface opposite to the crank cam 150 from which the crank pin 152 projects.

The crank cam 10 is intermittently driven from the initial position in FIG. 1 at a rotation angle of approximately 180 ° in the counterclockwise rotation direction.
The cam lever 157 for horizontal drawing and the cam lever 158 for unlocking the free key, which are pushed by the levers, are arranged rotatably around shafts 159 and 160, respectively. The other end of the wire 76 that drives the horizontal drawing arms 70a, 70b in the closing direction is connected to the cam lever 157 via a spring, and the other end of the wire 104, one end of which is fixed to a locking plate 98 of a free key mechanism. The cam lever 158 is fixed.

Reference numeral 170 denotes a micro switch for stopping the drive motor, which is turned on when the cam lever 158 is rotated.

162 is a cam lever operated by the cam surface of the crank cam 150, provided rotatably about a shaft 163,
The rotating roller 164 is attached to one end, and the other end of a wire 89 for tilting the bucket 24 and the other end of an air switching plate driving wire 165 described later are connected to the other end.

In FIG. 12, 166 is the air switching plate described above,
It is attached to a rotating rod 173 provided rotatably about a shaft 167. Reference numeral 169 denotes a blower fan provided to face the air switching plate 166.

The air switching plate 166 always shuts off the front of the blower fan 169 by the rotating rod 173 being pulled by the spring 168,
The air is guided downward, and the drive motor 151 of the drive unit 18 is driven.
The drive motor 151 is cooled by blowing air.

On the other hand, as described above, when the wire 165 is pulled, the rotating rod 173 is rotated against the spring 168, the air switching plate 166 is rotated, and the front of the blower fan 169 is opened.
As a result, air is blown toward the upper side of the bucket 24, and after the end of the heat sealing, the blown residue film is blown laterally (outside the machine).

 Subsequently, the overall operation will be schematically described.

13 and 14 are attached to facilitate the explanation.

(1) First, the film 21 is pulled out from the roll 22, and the film 21 is cut as described above.
The cut film is held between 135a and 135b and the film pressing members 142a and 142b, and is stretched above the top plate 27.

(2) The package 23 is placed on the bucket 24 from above the film 21. The central portion of the film 21 is lowered together with the package 23, and the four sides of the film are pressed by the protruding pieces 34 projecting inward of the holes of the top plate 27, so that the film 21 is slightly squeezed toward the package ( (FIG. 13 (a), FIG. 14)). The projecting length of the projecting piece 34 is preferably adjusted in advance according to the size of the package.

(3) Push the operation lever 111 to lower the pressing body 25. Thereby, as described above, the tip side of the swinging rod 113 descends via the wire rope 116, the wire 103 is pulled, the locking plate 97 is pulled upward, and the locking to the support rod 80 is released,
As a result, the support rod 80 can be moved downward (upward movement is impossible because the other retaining plate 98 is engaged).

The pressing body 25 is pushed down until the stopper 112 comes into contact with the support table 110. As a result, even if the size of the package 23 varies, the height position of the vertex (sealed portion) is always constant (FIG. 13 (b)).

When the binding position is changed by changing the pressing position of the package 23, the position of the stopper 112 may be adjusted, but this can be easily and quickly performed by attaching the spacer 119 to the lower end of the pressing body 25.

Since a net (film pressing body) 107 covers the upper surface of the bucket 24, the center of the film 21 is pressed by the elastic net 107 and pressed against the lower surface of the package 23.
Therefore, unnecessary air does not accumulate between the center portion of the film and the lower surface of the package, and the film is finally brought into close contact with the lower surface of the package to be beautifully packaged. This is important because the underside of the package is the front side of the product.
In FIG. 13, the receiving portion 108 of the bucket 24 is not shown.

When the hand is released from the operation lever 111, the swinging rod 113 is pulled by the spring 117, whereby the pressing body 25 moves up to the initial position via the wire rope 116.

At that time, the operation rod 121 is rotated upward about the shaft 120 with the rise of the stopper 112 by the action of the magnet 123,
The micro switch 124 is turned on. This allows the drive unit 18
Is driven.

Even if the pressing body 25 moves upward, the bucket 24 is not lifted and the package 23 is stopped at a predetermined position because the hook plate 98 is hooked on the support rod 80.

(4) When the micro switch 124 is turned on, the drive motor 151 operates, and the crank cam 150 rotates substantially 180 ° in the counterclockwise hand rotation direction in FIG. As a result, the sprocket 39 and thus the rotating shaft 38 are rotated clockwise through the drive chain body 155, and the chains 42a and 42b are rotated clockwise in FIG. 3, so that both slide bodies 36a and 36b move in the approaching direction, and thus the upper aperture The plates 28a and 28b move in the approaching direction, and the narrowing recesses 35a and 35b squeeze the edge of the film toward the center (FIG. 14), and slightly later, the lower diaphragm plates 31a and 31b also move in the approaching direction. Then, the film near the top of the package is narrowed down (FIG. 13 (c)).

Before the film ends are completely squeezed by the upper and lower squeezing plates, the squeezing rubbers 66a and 66b contact the upper part of the package with the film 21 interposed therebetween and squeeze the film ends. Thereby, the air between the package and the film is exhausted as much as possible.

On the other hand, during the rotation of the crank cam 150, the pushing roller 156 rotates the cam lever 157, and the wire 76 is pulled, whereby the swing arms 70a, 70b are rotated as described above, and the horizontal diaphragm plates 32a, 32b are rotated. The film portion being squeezed by the upper and lower squeezing plates is squeezed to narrow the width, and the next heaters 30a, 30b
To adjust the heat seal length.

Heat sealing with the heaters 30a and 30b is performed after the above-described narrowing.

That is, as described above, the upper and lower diaphragm plates come into contact with the corresponding stoppers to stop the forward movement.
After the heaters 30a and 30b are still advanced, the narrowed portions of the film are heat-sealed (FIG. 13 (d)).

When the dog 55 fixed to the slide body 36a presses the micro switch 56, the drive motor 151 is timer-controlled so as to stop for a few seconds, whereby the heaters 30a, 3
Film welding at 0b is completely performed. Drive motor
Even when 151 stops, the pressing force acts on both slide bodies 36a and 36b due to the tension of spring 172 interposed in drive chain body 155, and both heaters 30a and 30b are brought into close contact with a film interposed therebetween. Heat sealing is completed. The springs 171 and 172 interposed in the drive chain body 155 perform the above-described functions, and also serve as a safety escape when a worker's finger is caught between a pair of upper and lower aperture plates. Works. In addition, a chain 42 for driving both slide bodies 36a and 36b
Springs are also interposed in a and 42b, and these springs not only provide a constant tension to the chains 42a and 42b, but also act as escapes when foreign matter is caught.

Immediately before the drive motor 151 stops, the horizontal drawing plates 32a and 32b return to their original positions when the pushing roller 156 comes off the cam lever 157. When the drive motor 151 stops, the rotation of the crank cam 150 also stops, but this stop position is a position rotated by approximately 180 ° from the initial position in FIG. Therefore, after the elapse of the predetermined time, the drive motor 15
1 is re-driven in the same direction, this time the drive chain 155
Rotate in the opposite direction, and the two slide bodies 36a and 36b are moved in the separating direction.

Thereby, the order reverse to the above, that is, the heaters 30a, 3
0b, the lower diaphragm plates 31a, 31b, and the upper diaphragm plates 28a, 28b are separated from the heat sealing portion in this order. Also halfway through the squeezing rubber 66a, 6
6b also opens.

When the crank cam 150 rotates, the rotating roller 164 of the cam lever 162 rides on the cam surface of the crank cam 150. Thereby, the cam lever 162 is rotated in the hour hand rotation direction in FIG. 1, and the wire 89 and the wire 165 are pulled.

When the wire 89 is pulled, the bucket 24 is tilted as described above. When the bucket 24 starts tilting, the upper and lower aperture plates 31a and 31b are open, and the upper aperture plates 28a and 28b are still closed. Therefore, when the bucket 24 is tilted, the film is melted at the heat seal portion, and the end portions of the film protruding above the upper drawing plates 28a and 28b remain on the upper drawing plates 28a and 28b, and the heat-sealed packaging is completed. Stuff
23 is discharged toward the product receiving box 81 (FIG. 13 (e)).

On the other hand, when the wire 165 is pulled, the air switching plate 166 is rotated as described above, air is blown in the horizontal direction from the blower fan 169, and the upper diaphragm plates 28a and 28b are opened, and the film residue falling and the film residue is removed in the horizontal direction. It is blown off and discharged.

When the crank cam 150 further rotates, the pushing roller 156 pushes the cam lever 158 to rotate it, whereby the wire 104 is pulled. When the wire 104 is pulled, the latch plate
98 rotates downward, the support rod 80 is disengaged, and the support rod 80 and thus the bucket 24 rise to the initial position.

When the cam lever 158 is rotated, the micro switch 170 is pushed in, and the drive motor 151 is driven by the pushing roller 15.
6 stops at the position where the crank cam 150 is rotated to the initial position where it is disengaged from the cam lever 158, and returns to the initial state.

If the rotary roller 164 comes off the cam surface of the crank cam 150 immediately before the stop of the drive motor 151, the cam lever 162 rotates and returns, and the bucket 24 returns to the horizontal state by the action of the spring 85. The air switching plate 166 also has a spring 1
The rotation is returned by 68, and air is again blown toward the drive motor 151 to cool it.

The packaging device according to the present invention is not only for packaging of head vegetables,
It can be suitably used for packaging other lumps.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments.

For example, the cutting and feeding of a film and the feeding of a package can be automated.

The film supporting portion does not necessarily need to hold both ends of the film with the pressing members, and may be simply developed and supported on a supporting plate having a through hole for the package.

Either one of the upper and lower aperture members of the film binding portion may be provided. The film may be tied by a heater, fused, melted, tied with an adhesive tape, ribbon, wire, or the like, or simply wrapped around the film end (wrap).

It is not always necessary to tilt the bucket (receiver),
It may be provided to simply move up and down. In this case, it is preferable that the package after the completion of the packaging is taken out from the upper side of the film supporting portion.

The stopper mechanism of the support rod of the bucket may employ a lock mechanism as well as a non-return claw mechanism.

Further, the driving of the slide body of the film binding portion to move in and out of contact can be performed by a cylinder device.

Of course, many modifications can be made in accordance with the spirit of the invention.

(Effects of the Invention) As described above, according to the bulk package packaging apparatus of the present invention, when the package supplied on the receiver is pressed by the pressing body, the package descends together with the receiver and is free. The stop mechanism at the push-in position is maintained by the action of the stopper mechanism such as a key mechanism, so even if the size of the package varies, simply pressing the pressing body down a predetermined distance moves the top of the package directly under the binding unit. The package can be positioned accurately, and even if the pressing body is raised to the standby position, the package stays stopped at the push-in position, so that the film end is squeezed by the squeezing member and the film is tied by the heater or the like. Can be easily and reliably performed without being disturbed by the pressing body.

When a stopper for the pressing body is provided, the pressing body is stopped from lowering at a position where the pressing body is pressed down by a predetermined distance,
Therefore, the package is automatically positioned at a desired position, and accurate drawing and bundling can be performed.

If a spacer is appropriately attached to the lower end of the pressing body, the position where the package is pressed down can be easily and quickly changed, and the film can be bound at the optimum position according to the package.

In addition, when the package is pushed in by the pressing body by stretching the film pressing member having elasticity such as a net on the receiving member, the film is pressed against the lower surface of the package by the elastic force of the film pressing member and adheres. So it can be packaged well. In particular, since the bottom side of the package in this case often becomes the front side of the product,
The front side of the product can be packaged in a nice style.

[Brief description of the drawings]

FIG. 1 is a side view of the entire mechanism, mainly showing a pushing portion and a driving portion, FIG. 2 is a side (partial cross-sectional) view of a film binding portion and a bucket support portion, FIG. 4 and 5 are sectional explanatory views of the film binding portion, and FIG.
The figure is an explanatory view showing a connecting portion between the slide body and the lower diaphragm plate, and FIG.
FIG. 8 is a plan view showing a rotation mechanism of the horizontal drawing plate, FIG. 8 is a sectional view thereof, FIG. 9 is an explanatory view showing another embodiment of the bucket, FIG.
FIG. 10 is a side view of the film support portion, FIG. 11 is a plan view thereof,
FIG. 12 is an explanatory diagram of an air switching plate, FIG. 13 is an explanatory diagram of the operation of upper and lower aperture plates and a heater in a film binding portion, and FIG. FIG. 15 is an explanatory view of a spacer. 10 ... Film support part, 12 ... Push-in part, 14 ... Film binding part, 16 ... Bucket support part, 18 ... Drive part, 21 ...
Film, 23… Package, 24… Bucket, 25… Pressing body, 28a, 28b… Upper drawing plate, 30a, 30b… Heater, 31a, 3
0b Lower diaphragm plate, 32a, 32b Horizontal diaphragm plate, 35a, 35b Restricted recess, 36a, 36b Slide body, 46, 53, 61 Spring, 47 Stopper, 62 Stopper, 64a, 64b ……
Stopper, 66a, 66b: elastic string, 80: support rod, 92
…… Tension springs (biasing means), 97,98… Hook plates (stopper mechanism), 103,104 …… Wires (release means), 1
07 …… Net (film pressing body), 2… Stopper, 11
9 ... spacer.

Claims (5)

(57) [Claims] 1. A film supporting portion which is provided so as to allow a lump of package to pass therethrough and which supports a film for packaging the package at a site where the package passes, and a film supporting portion which is supported by the film supporting portion. A receiver is disposed below and receives a package supplied from above the film via a film drawn in by the supply of the package, and a receiver is provided between the film support portion and the receiver. A pair of opposing edge portions that narrow the film end extending above the package received on the receiver when approached at opposing edge portions with the body upper space interposed therebetween. And a film bundling unit having a film bundling part having a squeezing member, wherein the receiving body is supported on a base so as to be vertically movable, and biasing means for biasing the receiving body in a rising direction is provided. Down movement of the receiver is allowed , A stopper mechanism for prohibiting upward movement is provided, and a release means for releasing prohibition of upward movement of the receiver of the stopper mechanism is provided. A pressing body that pushes the package together with the receiver to the film binding position against the urging force of the urging means so as to be able to move up and down freely. A packaging device for a bulk package, wherein packaging is performed on a package remaining at a position. 2. The bulk packaging apparatus according to claim 1, further comprising a stopper for stopping the downward movement of the pressing body when the package is pushed into the film binding position. 3. A packaging apparatus for a bulk package according to claim 2, wherein a spacer is detachably attached to a lower end of said pressing body. 4. The stopper is supported on a base by a support rod so as to be vertically movable, and the stopper mechanism is slidably supported at one end by the base and has a hole into which the support rod is loosely inserted. 4. A universal key mechanism comprising a plate and a spring for urging the latch plate upward to lock a support rod at a hole edge of the latch plate. Packaging device for bulk packages. 5. A film pressing member made of a stretchable material having a weak elasticity such that the package received by the receiver does not float on the edge of the receiver. 5. The packaging device for a lump package according to 1, 2, 3 or 4.