JP2695334B2 - 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 packaging device for agricultural products, which wraps a spherical object to be packaged (for example, vegetables such as lettuce and cabbage, or fruits such as melon and apple) in a packaging sheet.

[0002]

2. Description of the Related Art As a packaging apparatus as described above, there is the following one. In other words, a packaging table having an opening into which the package falls is provided, the packaging sheet cut to a predetermined length is placed on the packaging table, and the package is dropped into the opening from above. As a result, the packaging sheet is squeezed at the outer edge of the opening, and the object to be packaged is wrapped in the packaging sheet and supported by the lower support table. This is a configuration in which fastening is performed.

[0003] The above-described packaging apparatus is provided with a draw-out mechanism for pulling out a wide packaging sheet wound and supported in a roll form by a predetermined length on a packaging table as a pre-stage of the packaging operation. is there. In this case, for example, FIG.
As shown in FIG. 22 and FIG. 22, a flat and fixed pedestal 104b extending over substantially the entire lateral width of the packaging sheet 101, and a flat plate-like swing-driving holding plate 1 extending over the substantially entire lateral width of the packaging sheet 101.
The pull-out mechanism 104 is configured by including 04a. With the above structure, the drawer mechanism 104 moves to the left in the drawing from the state shown in FIG. 21, and the end of the packaging sheet 101 is inserted between the pedestal 104b and the sandwiching plate 104a to lower the sandwiching plate 104a. Then, the pedestal 104b and the sandwiching plate 104a sandwich the end portion of the packaging sheet 101. Next, the pull-out mechanism 104 moves rightward on the paper surface to pull out the packaging sheet 101 onto the packaging table 105, and the cutter 102 descends to cut the packaging sheet 101 into a predetermined length.

[0004]

In the above-mentioned structure, since the packaging sheet has a wide width, the pull-out mechanism uses the wide-width holding plate and the pedestal. However, since the sandwiching plate and the pedestal are often manufactured from thin plates, it is difficult to make the sandwiching surface that sandwiches the packaging sheet have high flatness, and when the sandwiching surface is wavy or wavy. There are many. As a result, even if the holding plate is moved down to the cradle side, the holding plate and the holding plate do not come into contact with each other evenly over the entire surface, and only a few point contact parts are provided. There may be a state where there is no. Therefore, if both the sandwiching surfaces of the sandwiching plate and the pedestal are in the above-described state, when the end portion of the packaging sheet is sandwiched by the pulling-out mechanism, for example, the points of the sandwiching plate 104a and the pedestal 104b as shown in FIG. The packaging sheet 101 is pulled out only by the contact portion Y. Thereby, the packaging sheet 101 of the point contact portion Y
There is a possibility that a large pulling force acts only on the portion, and the packaging sheet 101 is broken at this portion during pulling.
An object of the present invention is to configure the packaging sheet so that when it is pulled out onto the packaging table, the packaging sheet is not broken or the like.

[0005]

A feature of the present invention resides in the following configuration in the above-described packaging apparatus. That is, a plurality of operation arms for sandwiching the packaging sheet are provided at equal intervals over substantially the entire width of the packaging sheet, and each operation arm has a sandwiching posture for sandwiching the end portion of the packaging sheet with a fixed cradle and a receiving posture. Each operation arm is equipped with a spring that urges each operation arm independently in a non-clamping posture away from the table, and biases each operation arm toward the clamping posture side, and each operation arm can be moved to the non-clamping posture at the same time. A pull-out mechanism for the packaging sheet, and a clamping position where the end of the packaging sheet is clamped between the operation arm and the pedestal by the urging force of the spring, and the sandwiched packaging sheet on the packaging table. Further, a cutter is provided for supporting the drawer mechanism so as to be able to reciprocate along the packaging table over a drawer position where the drawer is pulled out by a predetermined length, and for cutting the packaging sheet pulled out by the drawer mechanism into a predetermined length.

[0006]

With the above-mentioned structure, for example, as shown in FIGS.
As shown in (4), when one wrapping is completed, the pull-out mechanism 58 moves to the holding position on the cutter 59 side in order to pull out the wrapping sheet 1 for the next wrapping onto the wrapping table 2. In this case, the operation mechanism is operated, and all the operation arms 58a of the drawer mechanism 58 are operated in the non-clamping posture separated from the fixed receiving base 76. Then, when the drawer mechanism 58 reaches the holding position, the operation arm 58a of the drawer mechanism 58.
The end portion 1b of the packaging sheet 1 is inserted between the pedestal 76 and the pedestal 76. Next, when the action of the operating mechanism disappears, the operating arms 58a move to the cradle 76 side by the urging force of the springs 77, as shown in, for example, FIG. 6 and FIG.
The end 1b of the packaging sheet 1 is sandwiched between a and the pedestal 76. In this case, each operation arm 58a is independent of the pedestal 7
Since it is urged to the 6 side, even if the holding surface of the pedestal 76 is undulating or wavy, each operating arm 58a is pressed by the spring 77 by the same urging force, and this same The end portion 1b of the packaging sheet 1 is clamped by the urging force. Therefore, when the pulling-out mechanism 58 pulls out the packaging sheet 1 to the right side of the drawing from this state as shown in FIG. 7A, each operation arm 58a holds the end portion 1b of the packaging sheet 1 with the same biasing force. The pulling force is evenly distributed over the entire lateral width of the end portion 1b of the packaging sheet 1 by the two points, that is, the operating arms 58a are arranged at equal intervals (see FIG. 6). It will hang. In this way, when the packaging sheet is pulled out on the packaging table by a predetermined length, the cutter operates and the packaging sheet is cut into a predetermined length.

[0007]

As described above, when pulling out the packaging sheet, the pulling force can be evenly distributed and applied over the entire lateral width of the end of the packaging sheet, and the pulling force is partially concentrated. It was possible to prevent a pull-out failure such that the packaging sheet would be torn. By suppressing the pull-out failure in this way, the efficiency of the packaging device as a whole could be improved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire packaging device of the present invention,
The packaging operation in this packaging apparatus is performed in the following steps. In other words, the step of dropping the packaged object A from above into the opening 2a of the packaging table 2 on which the packaging sheet 1 is placed (this is performed by an operator), and the step of dropping into the opening 2a A step of wrapping the package A in the packaging sheet 1 and supporting the package A on the support 3 below the packaging table 2, the upper side of the package sheet 1 wrapping the package A on the support 3. Step of narrowing the portion from the lateral direction, step of cutting out the upper part of the narrowed packaging sheet 1, step of cutting the packaging sheet 1
, A step of pressing the adhered adhesive tape 4 from above, a step of taking out the packaged object A from the support base 3 sideways, and a step of preparing a roll in preparation for the next packaging. The packaging sheet 1 wound around the packaging table 2
It is a step of pulling out a predetermined length above, cutting the roll side portion, and placing one packaging sheet 1 on the packaging table 2.

(1) First, the structure of each mechanism in the step of drawing the packaging sheet 1 for the next packaging operation onto the packaging table 2 as the final step of one packaging operation will be described.
As shown in FIGS. 1 and 2, the transparent packaging sheet 1 is wound in a roll shape and supported by a pair of support rollers 56a and 56b, and the tip of the packaging sheet 1 is paired with upper and lower feeding rollers 57a and 57b. It is pinched. Support frame 61 extended from the support roller 56a on the right side of the drawing
The upper feeding roller 57a is supported by
The gear 62 fixed to the support roller 56a is the support frame 6
1 is engaged with the gear 63, and the gear 63 and the feeding roller 5
A transmission chain 64 is laid across 7a. A drive gear 65 for driving the gear 62 and a motor 66 are provided, and the support roller 56 a and the feeding roller 57 are provided.
a is rotationally driven, and the other support roller 56b and the feeding roller 57b are freely rotated.

Next, the first receiving stand 67 and the second receiving stand 68 for supporting the packaging sheet 1 from below when cutting the packaging sheet 1 will be described. As shown in FIGS. 2 and 5, on the lower right side of the drawing rollers 57a and 57b, a first receiving table 67 and a second receiving table 68, each having a width larger than the width of the packaging sheet 1, are provided. The first receiving table 6 is provided at a predetermined interval (for allowing a cutter 59 to be described later to enter).
7 is set at a position slightly lower than that of the second receiving table 68.

Next, a cutter 5 for cutting the packaging sheet 1
9 and the like will be described. As shown in FIGS. 3 and 4, guide poles 69 are provided on the left and right sides of the first and second receiving stands 67 and 68, and the support frame 70 is vertically slidable on the guide pole 69 via the boss 70a. Supported. One drive shaft 82 is rotatably mounted below the second receiving table 68, and the operation plate 8 fixed to the left and right of the drive shaft 82.
2a and a link 83 is provided between the left and right boss portions 70a of the support frame 70, and a driving motor 84
A transmission chain 85 is provided between the drive shaft 82 and the drive shaft 82.

A flat plate-shaped cutter 59 having a width larger than the width of the packaging sheet 1 is fixed to the support frame 70. A plate-shaped pressing member 60 having a width approximately half the width of the packaging sheet 1 is used as a cutter. A total of four of 59 are provided, two on the front left and right and two on the rear left and right. Each holding member 6
A rubber material 60a is attached to the lower surface of the support frame 70, and each pressing member 60 can move up and down on the support frame 70, and
It is provided in a state of being biased downward by a spring 60b. Then, as shown in FIG. 2, the rubber member 60 a of the pressing member 60 is set to protrude below the lower end of the cutter 59 when the support frame 70 is raised.
With the above structure, when the drive shaft 82 is driven one rotation in the state shown in FIG. 3, the cutter 59 descends to cut the packaging sheet 1 and returns to the position shown in FIG. 3, as described later.

Next, a drawer mechanism 58 for pulling out the packaging sheet 1 onto the packaging table 2 will be described. As shown in FIG. 2, guide rails 2b provided on both the left and right sides of the packaging table 2
A pair of support plates 71 are slidably supported along, and sprockets 72 are supported on the left and right of the end on the second receiving table 68 side of the packaging table 2 and on the left and right of the opposite end. A pair of left and right chains 73 is wound around a sprocket 72, and the left and right chains 73 are connected to the left and right support plates 71. Thus, by driving the right and left sprockets 72 on the second receiving table 68 side forward and backward by the motor 91 (see FIG. 18), the drawing mechanism 58 (the left and right support plates 71) is slid along the packaging table 2. I do.

As shown in FIGS. 1, 2, and 6, one support shaft 74 is provided across the left and right support plates 71, and five operation arms 58a swing independently on the support shaft 74. A rubber plate 5 is attached to the outer surface of the operation arm 58a.
8b is fixed. Further, a flat receiving base 76 is fixedly mounted on the left and right support plates 71 below the operation arm 58a. In this case, as shown in FIG. 2, the support plate 71 is slightly lower than the second receiving table 68 on the cutter 59 side.
The pedestal 76 is set to be positioned. Then, one frame 75 erected over the left and right support plates 71.
A spring 77 that urges each of the operation arms 58a toward the swinging side of the receiving base 76 is provided between the control arm 58a and each of the operation arms 58a.

The support shaft 74 is rotatably supported by a support plate 71. As shown in FIGS.
Arms 74a are fixed to the left and right of
One rod 74b is erected and fixed over a. A link 79 is provided over a fan-shaped gear 78 swingably supported by one support plate 71 and one arm 74a, and a motor 80 and a pinion gear 81 for driving the fan-shaped gear 78 are provided. I have. In the state shown in FIG. 2, the motor 80 is driven to pull down the rod 74 b and each operating arm 5
8a is being lifted from the pedestal 76 (corresponding to an operating mechanism), and when the motor 80 is driven in the reverse direction to pull up the rod 74b as described later, the urging force of each spring 77 causes each operating arm 58a to receive. The packaging sheet 1 descends to the table 76 side
To pinch.

(2) Next, the initial state of the packaging work for installing the roll-shaped packaging sheet 1 on the support rollers 56a and 56b will be described. When the packaging sheets 1 having different widths are installed on the support rollers 56a and 56b as described later, the center of the width of the roll portion of the packaging sheet 1 is located at the center of the width of the support rollers 56a and 56b regardless of the width. In other words, when the packaging sheet 1 is pulled out by the pull-out mechanism 58 as described later, the packaging sheet 1 is placed so that the second mark 1d of the packaging sheet 1 shown in FIG. .

As shown in FIG. 18, a cutting switch 93 that can drive only the motor 84 for the cutter 59 and a feeding switch 94 that can drive only the motor 66 for the support roller 56a and the feeding roller 57a are provided. There is. When the cut switch 93 is pressed once,
The motor 84 operates from the state shown in FIG.
Descends, rises to the original position again, and the motor 84 stops. The delivery switch 94 is biased toward the return side,
Only while the push-out switch 94 is being pressed,
The motor 66 for the support roller 56a and the feeding roller 57a operates, and when the feeding switch 94 is released, the motor 66 stops.

In the vicinity of the first end of the packaging sheet 1, FIG.
In many cases, the unprinted extra portion such as the first mark 1c as shown in FIG. Therefore, the packaging sheet 1 is installed, and the first end thereof is moved up and down by the feed rollers 57a and 57a.
When it is inserted between 57b, the feeding switch 94 is pushed and an extra portion of the packaging sheet 1 is fed. Then, the first first mark 1c is positioned at a predetermined position (FIG. 2).
When the end 1b of the packaging sheet 1 to be cut comes to a position directly below the cutter 59 as shown in FIG. 12), the feeding of the packaging sheet 1 is stopped, and the cutting switch 93 is pressed. It cuts off the excess and removes it.

(3) Packaging sheet 1 for the next packaging operation
The flow of operation of each mechanism in the process of pulling out the paper on the packaging table 2 will be described. When the packaging sheet 1 is installed as in (2) above and the start switch 95 of the packaging device shown in FIG. 18 is pressed, a single packaging operation as described in (6) below is performed first. However, in this case, since the article A to be packaged has not been put into the opening 2a of the packaging table 2, the packaging apparatus is idle.

The state shown in FIGS. 1 and 2 is a state in which one-time packaging has been completed. In order to pull out the next packaging sheet 1 for packaging on the packaging table 2, the drawer mechanism 58 uses the cutter 59.
Before and after moving to the side. Then, as shown in FIG. 9, when the drawer mechanism 58 reaches the holding position which is the position of the second pedestal 68 and stops (the operation arms 58 a of the drawer mechanism 58 are lifted from the pedestal 76,
(Corresponding to the non-clamping posture), the drive gear 65 is driven to rotate the support roller 56a in the clockwise direction, the feeding roller 57a is driven to rotate in the counterclockwise direction, and the end portion 1b of the packaging sheet 1 is moved to the second pedestal. It is extended from 68 to the pull-out mechanism 58 side.

When the drive gear 65 makes one rotation, the notch 65a (see FIG. 2) of the drive gear 65 without gear teeth is shifted to the gear 62.
Is reached, the motor 66 stops and the support rollers 56a
And the feeding roller 57a also stops. In this state, as shown in FIG. 9, the end 1b of the packaging sheet 1 is sufficiently inserted between the operation arm 58a of the drawer mechanism 58 and the receiving base 76, and then the motor 80 of the drawer mechanism 58 operates. The rod 74b is lifted up, and each operating arm 58a is lowered to the receiving base 76 side by the urging force of each spring 77, and FIG.
As shown in 0, the end portion 1b of the packaging sheet 1 is clamped by each operation arm 58a and the pedestal 76 (corresponding to the clamping posture).

Next, as shown in FIG. 11, with the end 1b of the packaging sheet 1 held therebetween, the pull-out mechanism 58 moves to the right in the drawing, and pulls out the packaging sheet 1 onto the packaging table 2. In this case, the notch 65a of the drive gear 65 is
2, the gear 62 is freely rotatable, so that the gears 62, 63, the support rollers 56a,
The drawing roller 56b and the feeding rollers 57a and 57b rotate freely as shown in FIG.

As shown in FIG. 7, the packaging sheet 1 is transparent, but a first mark 1c indicating the type and the manufacturer of the packaged object A is placed at the center position in the width direction of the packaging sheet 1 in the longitudinal direction. Are printed at predetermined intervals along the line. The second mark 1d is printed at a position separated from the center of the first mark 1c by a first predetermined interval L1 along the horizontal width direction and a second predetermined interval M1 longitudinally rearward from the center of the first mark 1c. . As shown in FIGS. 1 and 7, a reflection type optical sensor 87 having a light emitting device and a light receiving device is provided on a frame 86 fixed to the packaging table 2.

With the above structure, the packaging sheet 1 is pulled out by the pulling-out mechanism 58, and the packaging sheet 1 is pulled out as shown in FIGS.
As shown in (2), the second mark 1d of the packaging sheet 1 reaches the position of the optical sensor 87, and the detection light from the light emitter of the optical sensor 87 is reflected on the second mark 1d and detected by the light receiver of the optical sensor 87. Then, the position (corresponding to the drawer position)
, The drawer mechanism 58 is temporarily stopped. In this case, FIG.
Further, as shown in FIG. 2, when the drive gear 65 is rotationally driven in the counterclockwise direction of the drawing by a predetermined angle and the gear teeth of the drive gear 65 mesh with the gear 62, the motor 66 stops at this angle. As a result, the gears 62 and 63, the support rollers 56a, which have been freely rotated when the packaging sheet 1 is pulled out,
56b and the feeding rollers 57a and 57b are also stopped, and at the same time when the drawer mechanism 58 is stopped, the packaging sheet 1
The rotation of the roll-shaped portion of the sheet is braked, and there is no waviness or wrinkling between the roll-shaped portion of the packaging sheet 1 and the pull-out mechanism 58.

Next, as shown in FIG. 13, the support frame 70 having the cutter 59 and the pressing member 60 is lowered. In this case, as shown in FIG.
Since the rubber material 60a of 6 protrudes below the lower end of the cutter 59, when the support frame 70 is lowered,
First, four pressing members 60 before and after the cutter 59 press the packaging sheet 1 against the first and second receiving tables 67 and 68,
Holding the packaging sheet 1. Next, the cutter 59 enters between the first and second receiving tables 67 and 68, and
At once. When the packaging sheet 1 is pulled out and cut in this way, the first mark 1c is located at the center in the longitudinal direction of the cut packaging sheet 1 as shown in FIG.

When the cutting of the packaging sheet 1 is completed in the state shown in FIG. 13, the support frame 70 provided with the cutter 59 and the pressing member 60 is raised to the original position, and
As shown in FIGS. 14 and 7, the pull-out mechanism 58 moves to the right side of the drawing by a distance N1 (the distance between the first mark 1c of the packaging sheet 1 and the opening 2a of the packaging table 2), and stops and cuts. The first mark 1c of the formed packaging sheet 1 is positioned at the opening 2a of the packaging base 2 (see FIG. 7B). Thereafter, each operation arm 58a of the drawer mechanism 58 is moved to the receiving table 7
6, the end 1 b of the packaging sheet 1 is released, and one packaging sheet 1 cut to a predetermined length is placed on the packaging table 2.

As shown in FIGS. 1 and 18, the second receiving table 6
A potentiometer 88 is provided on the sprocket 72 on the eighth side to detect the position of the pull-out mechanism 58. In this case, an operation of stopping the drawer mechanism 58 when the drawer mechanism 58 reaches the holding position (see FIG. 9) that is the position of the second receiving table 68, and
Two operations of an operation of stopping when the drawer mechanism 58 reaches a position (see FIG. 7B) in which the first mark 1c of the cut packaging sheet 1 reaches the position of the opening 2a of the packaging table 2 (see FIG. 7B). Is performed based on the detection signal from the potentiometer 88. Then, as shown in FIG. 7A, when the packaging sheet 1 is pulled out to the length to be cut (corresponding to the pull-out position), the operation of stopping the pull-out mechanism 58 is as follows.
This is performed based on the detection of the optical sensor 87.

(4) In this packaging apparatus, three types of packaging sheets 1 having different widths depending on the size of the article A to be packaged 1,
89 and 90 are configured so that they can be used. Next, a description will be given of a configuration in which the pull-out length is changed corresponding to these three types of packaging sheets 1, 89 and 90. As shown in FIG. 8, packaging sheets 1, 8 having three types of large, medium, and small widths
9, 90, the first mark 1c, 89a, 90a, at the central position in the width direction of the packaging sheet 1, 89, 90,
It is printed at predetermined intervals along the longitudinal direction. In this case, the narrower the width of the packaging sheet 1, 89, 90, the first
The predetermined interval between the marks 1c, 89a, 90a is narrow. From the center of the first marks 1c, 89a, 90a to the first predetermined interval L1 (common to each packaging sheet 1, 89, 90) along the lateral width direction, from the center of the first marks 1c, 89a, 90a,
The second marks 1d, 89b, 90b are printed at positions rearward in the longitudinal direction by the second predetermined intervals M1, M2, M3. In this case, the packaging sheet 1 having a large width has a second predetermined distance M1, and the packaging sheet 89 having a medium width has a second predetermined distance M2.
The packaging sheet 90 having a small width has the second predetermined interval M3.

The position of the optical sensor 87 on the side of the packaging apparatus does not change with respect to the above-mentioned packaging sheets 1, 89 and 90.
Therefore, as shown in FIG. 8, when the packaging sheets 1, 89, 90 are pulled out by the pull-out mechanism 58, the position where the pull-out mechanism 58 stops based on the detection of the optical sensor 87, that is, the packaging sheets 1, 89, 90. End 1b of
Since the positions of 89c and 90c are different from each other, the first marks 1c, 89a and 90a are located at the centers in the longitudinal direction of the respective wrapping sheets 1, 89 and 90 cut by this.

In each of the packaging sheets 1, 89 and 90, FIG.
As shown in the figure, after cutting, each packaging sheet 1
When the drawer mechanism 58 is slid so that the first marks 1c, 89a, 90a of 89, 90 are positioned in the opening 2a of the packaging table 2, the distances N1, N2, N3 are different. In this case, the distance is N1 for the packaging sheet 1 having a large width, the distance N2 for the packaging sheet 89 having a medium width, and the distance N3 for the packaging sheet 90 having a small width.

Therefore, when one of the three types of packaging sheets 1, 89, 90 having different widths is selected, the operator operates the selection switch 92 shown in FIG. , 89, 90, the distance N
1, N2, and N3. As a result, after the cutting, the pull-out mechanism 58 moves by the distances N1, N2, N3 corresponding to the respective packaging sheets 1, 89, 90, and the first marks 1c,
89 a and 90 a are located in the opening 2 a of the packaging table 2.

(5) In this packaging device, the drawer mechanism 5
8 is provided with an abnormality detection function for movement and stop as described above. Next, regarding this abnormality detection function, FIG.
0 will be described. As shown in FIG. 9, it is assumed that one wrapping is completed and the drawer mechanism 58 returns to the holding position. In this case, since the operation arm 58a of the drawer mechanism 58 enters just below the optical sensor 87, the detection light from the light emitter is reflected, and the optical sensor 87 is in the detection state (ON state). Therefore, when the optical sensor 87 is in the ON state (step S1), if the potentiometer 88 for the drawer mechanism 58 shown in FIG. 1 does not output a signal corresponding to the holding position (step S2), the optical sensor 87 or It is determined that the potentiometer 88 has an abnormality, the packaging is temporarily stopped, and the buzzer sounds (step S3).

Conversely, when the optical sensor 87 is in the OFF state of non-detection (step S1), if the potentiometer 88 for the drawer mechanism 58 shown in FIG. 1 outputs a signal corresponding to the holding position ( Step S4), it is determined that there is an abnormality in the optical sensor 87 or the potentiometer 88, the packaging is temporarily stopped, and a buzzer sounds (step S4).
3).

Next, as shown in FIG.
8 supposes that the end 1b of the packaging sheet 1 has been normally clamped, and the packaging sheet 1 has been pulled out to the right in the drawing. in this case,
The position of the end 90c of the small width packaging sheet 90 (position of the end 90c in FIG. 8) is detected by the potentiometer 88 when the drawer mechanism 58 passes a predetermined position on the side of the cutter 59 slightly to the left of the paper. Then, if each part is normal, the pull-out mechanism 5
8, end portions 1b of the packaging sheets 1, 89, 90 shown in FIG.
89c, 90c, and the packaging sheets 1, 89, 9
The second mark 1d, 89b, 90b of 0 is the optical sensor 87.
Will be reached directly below.

If the drawer mechanism 58 has passed the aforementioned predetermined position (step S5) and a predetermined time has elapsed (step S6), and if the optical sensor 87 is not turned on (step S7), a drawer failure or optical sensor failure occurs. 87 is determined to be defective. In this case, the drawer mechanism 58 is temporarily stopped, the cutter 59 is operated to cut the packaging sheet 1, and the drawer mechanism 58 is returned to the holding position shown in FIG. 9, and the packaging sheet 1 is held and pulled out again (step 11). , 12). Then, when such a drawer failure or the detection failure of the optical sensor 87 occurs several times consecutively (steps S8 and S9), the packaging is temporarily stopped and a buzzer sounds (step S10).

Next, it is assumed that the drawer mechanism 58 has passed the above-described predetermined position (step S5), and after a predetermined time has elapsed (step S6), the optical sensor 87 is turned on. In this case, the pull-out mechanism 58 is stopped at the positions of the ends 1b, 89c, 90c of the packaging sheets 1, 89, 90 shown in FIG. Moves by distances N1, N2, and N3. Then, if the stop position of the pull-out mechanism 58 is the position of the end portion 1b, after this, it moves by the distance N1.
In other words, the position of the end 1b corresponds to the distance N1, the position of the end 89c corresponds to the distance N2, and the position of the end 90c corresponds to the distance N3.

In this case, the packaging sheets 1, 89,
According to 90, one of the distances N1, N2, and N3 should have been set by the selection switch 92 shown in FIG. 18, but the position where the drawer mechanism 58 stopped as described above,
The distances N1, N2,
N3 may be different (step 13). Therefore, if the packaging in such a state is performed several times consecutively (steps S14 and S15), the packaging is temporarily stopped and the buzzer sounds (step S16).

(6) After the one wrapping sheet 1 cut into the predetermined length as described above is placed on the wrapping table 2, the step of wrapping the article A to be wrapped will be described. . As shown in FIG. 15A, when the packaged object A is first dropped into the opening 2 a of the packaging table 2, the packaged object A falls into the lower support table 3 while being wrapped by the packaging sheet 1. .
When the operator pushes the start switch 95 shown in FIG. 18 in this state, the support base 3 is lowered as shown in FIG. 15B, and the packaging sheet 1 is squeezed at the outer edge of the opening 2a. . In this case, the plurality of rubber plate-shaped auxiliary diaphragm members 11
Is provided below the opening 2a so as to surround the article A to be packaged, and the packaging sheet 1 is further squeezed by the auxiliary throttle member 11.

Next, a pair of plate-like holding members 14 arranged on the lower side of the packaging table 2 are shown in FIGS.
As shown in (a), the sheet proceeds to the packaging sheet 1 side, and the upper portion 1a of the packaging sheet 1 is narrowed down. Thereby, the packaged object A is almost completely wrapped in the packaging sheet 1. Thereafter, as shown in FIG.
8 advances along the upper surface of the holding member 14, and the upper part 1a of the packaging sheet 1 is cut off.

Next, as shown in FIG. 16B, the adhesive tape 4 cut to a predetermined length is placed over the upper end of the packaging sheet 1 and the end of the holding member 14, and FIG. As shown in (2), the adhesive tape 4 is pressed from above by the sponge member 47. Then, in a state where the adhesive tape 4 is pressed by the sponge 47, the pair of holding members 14 are opened as shown in FIG. 17A, and the sponge member 47 is pressed again to the packaged object A side, and the adhesive The tape 4 is surely adhered to the packaging sheet 1.

Thereafter, as shown in FIG. 17 (b), the support base 3 is operated to change its posture in the horizontal direction, and the article to be packaged A is moved to the slide 55 on the horizontal side and discharged out of the apparatus. FIG. 17C shows the state of the packaged object A that has been completely packaged in this way.
Shown in When one package is completed as described above, the process returns to the item (3), and the next packaging sheet 1 is pulled out and cut.

[Other Embodiments] In the above-described embodiment, in the pull-out mechanism 58, a wide width 1 is provided for each operation arm 58a.
Although the pedestal 76 is provided, the pedestal 76 is also formed in a narrow strip shape like the operation arm 58a, and the pedestal 7 is provided.
6 may be provided for each operation arm 58a. Further, the vertical relationship between the operation arm 58a and the pedestal 76 may be reversed, and the operation arm 58a may be provided below the pedestal 76.

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

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a packaging device viewed from above.

FIG. 2 is a side view of a support structure of a roll-shaped portion of a packaging sheet, a cutter and a holding member, and a vicinity of a drawer mechanism.

FIG. 3 is a side view showing an elevating structure of a cutter and a holding member.

FIG. 4 is a front view showing an elevating structure of a cutter and a holding member.

FIG. 5 is a plan view showing the vicinity of a roll portion and a feed roller of the packaging sheet.

FIG. 6 is a plan view of a drawer mechanism.

FIG. 7 is a plan view showing a state in which the packaging sheet is pulled out and stopped by the drawer mechanism.

FIG. 8 is a plan view when three types of packaging sheets having different widths are pulled out by a drawer mechanism.

FIG. 9 is a side view showing a state in which the packaging sheet is being fed to the drawer mechanism that has reached the holding position.

FIG. 10 is a side view showing a state where an end portion of the fed out packaging sheet is held by a drawer mechanism;

11 is a side view showing a state in which the drawer mechanism is pulling out the packaging sheet from the state of FIG. 10;

FIG. 12 is a side view showing a state where the second mark of the packaging sheet is detected by the optical sensor and the drawer mechanism is stopped.

FIG. 13 is a side view showing a state where the cutter cuts the packaging sheet after the state of FIG. 12;

14 is a side view showing a state in which the drawer mechanism is pulling out the packaging sheet after the state in FIG. 13;

FIG. 15 is a perspective view showing a flow of wrapping from inserting the object to be packaged into the opening to narrowing down the wrapping sheet by the holding member.

FIG. 16 is a perspective view showing the flow of packaging from the cutting of the upper part of the packaging sheet to the pressing of the adhesive tape by the sponge member.

FIG. 17 is a perspective view showing the flow of packaging from the opening operation of the holding member to the release of the packaged object, and the state in which packaging is completed.

FIG. 18 is a circuit diagram showing a linked state of each switch, motor, and operation cylinder.

FIG. 19 is a flowchart showing a first half of a flow of control of abnormality detection when a packaging sheet is pulled out;

FIG. 20 is a flowchart showing the latter half of the control of the abnormality detection when the packaging sheet is pulled out;

FIG. 21 is a perspective view showing a conventional packaging sheet drawing structure.

FIG. 22 is a plan view showing a conventional packaging sheet drawing structure.

[Explanation of symbols]

 1 Packaging Sheet 1b Edge of Packaging Sheet 2 Packaging Platform 2a Opening Hole of Packaging Platform 58 Drawer Mechanism 58a Drawer Mechanism Operation Arm 59 Cutter 76 Cradle 77 Spring A

Claims (1)

(57) [Claims] 1. A packaging table (2) for mounting a wide packaging sheet (1) cut into a predetermined length and provided with an opening (2a) into which a spherical object (A) is dropped. When the object to be packaged (A) is dropped into the opening (2a) from above, the wrapping sheet (1) on the packaging table (2) is squeezed at the outer edge of the opening (2a) to be packaged. Item (A) is packaging sheet (1)
A packaging device configured to be wrapped with a plurality of operation arms (58a) for sandwiching the packaging sheet (1) at equal intervals over substantially the entire width of the packaging sheet (1). (58) Fixed pedestal (76)
And an operating arm which independently and reciprocally support a holding posture for holding the end portion (1b) of the packaging sheet (1) and a non-holding posture separated from the cradle (76). Each operation arm (58a) is provided with a spring (77) for urging (58a) toward the sandwiching attitude side, and each operation arm (58a) is provided with an operation mechanism capable of simultaneously moving to the non-sandwiching attitude,
An end portion (1b) of the packaging sheet (1) is constituted by the operation arm (58a) and the pedestal (76), which constitutes a pulling-out mechanism (58) for the packaging sheet (1) and is urged by the spring (77). ) Is sandwiched between the holding position and the holding position for pulling out the held packing sheet (1) on the packing table (2) by a predetermined length, and the pulling-out mechanism (58) is arranged along the packing table (2). And a cutter (59) for cutting the packaging sheet (1) pulled out by the pulling-out mechanism (58) into a predetermined length.