JPH05193605A - Packaging device - Google Patents

Abstract

PURPOSE:To cut a packaging sheet assuredly and beautifully when a roll-shaped packaging sheet is pulled out by a specified length and cut, for a packaging device which is constituted in such a manner that when an object to be packaged is dropped in an open hole on a packaging table on which a packaging sheet is placed, the packaging sheet is contracted at the outer edge of the open hole, and the object to be packaged is wrapped by the packaging sheet. CONSTITUTION:The title packaging device is equipped with a pull-out mechanism 5 which pulls out a packaging sheet 1 on a packaging table by a specified length while the end of the packaging sheet 1, which is wound into a roll shape, is being pinched, and the rolled part of the packaging sheet 1 is being rotated. At the same time, the title packaging device is also equipped with a damper mechanism which stops the rotation of the rolled part of the packaging sheet 1 when the pull-out mechanism 58 stops at the pull-out location. By this method, the packaging sheet 1 is suppressed from generating waveness and wrinkles due to an excessive let-out, and the packaging sheet 1 is cut at a specified length by a cutter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing device for agricultural products in which a spherical object to be packed (for example, vegetables such as lettuce and cabbage, or fruits such as melon and apple) is wrapped in a packing sheet.

[0002]

2. Description of the Related Art There are the following packaging devices as described above. That is, a packaging table having an opening through which the article to be packaged falls is provided, the packaging sheet cut to a predetermined length is placed on the packaging table, and the article to be packaged 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, after which the excess portion of the squeezed packaging sheet is cut and the packaging sheet This is a configuration in which fastening is performed.

In the packaging apparatus as described above, as a pre-stage of the packaging work, the packaging sheet wound and supported in a roll shape is pulled out on the packaging table by a predetermined length and cut. is there. In this case, for example, as shown in FIG. 21, with respect to the cutter 102 having a width equal to or larger than the width of the packaging sheet 101, the five pedestals 103 provided with the slits 103a into which the cutters 102 enter are laterally arranged at predetermined intervals. And a pull-out mechanism 104 including an operation arm 104a that is inserted between the receiving table 103 and the receiving table 103 and holds the end of the packaging sheet 101. With the above structure, the drawer mechanism 104 moves to the left side of the drawing from the state shown in FIG.
The respective operation arms 104a of (1) enter between the pedestals 103 and hold the end 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 stop, and the cutter 1
02 is lowered until it enters the slit 103a of the pedestal 103, and the packaging sheet 101 is cut into a predetermined length.

[0004]

As described above, when the packaging sheet is pulled out on the packaging table by the pulling mechanism,
Along with this, the roll-shaped portion of the packaging sheet also rotates and the packaging sheet is fed (counterclockwise in FIG. 21). In this case, when the pulling-out mechanism pulls out the packaging sheet for a predetermined length and stops, the roll-shaped portion of the packaging sheet may not immediately stop rotating. This is because the roll-shaped part of the packaging sheet is relatively heavy,
This is because once it starts rotating, it cannot stop suddenly by its own inertia. It is assumed that the roll-shaped portion of the packaging sheet is delayed and stopped when the pulling-out mechanism pulls out the packaging sheet and stops as described above. In this case, even though the drawer mechanism that holds the end of the packaging sheet is stopped,
Since the packaging sheet is fed out from the roll-shaped portion of the packaging sheet, the packaging sheet may be wavy or have large wrinkles between the roll-shaped portion and the drawing mechanism. Therefore, when the packaging sheet is cut with a cutter while the packaging sheet has large wrinkles, if the packaging sheet is not cut well over the entire width, or if there are large wrinkles in the cut portion on the roll-shaped side. There are cases. Therefore, there is a hindrance to the packaging work performed thereafter and the drawing of the next packaging sheet. It is an object of the present invention to surely cut the entire width of the packaging sheet when the packaging sheet is pulled out, and to prevent wrinkles from being generated in the cut portion of the packaging sheet.

[0005]

A feature of the present invention is that the packaging apparatus as described above is configured as follows. That is, [1] a support member that rotatably supports a wrapped packaging sheet around the roll axis, a clamping position that clamps the end of the packaging sheet, and a roll-shaped portion of the packaging sheet. While rotating, the pulling mechanism that can reciprocate over the pulling position where the sandwiched packaging sheet is pulled out on the packaging table by a predetermined length, and the predetermined position on the roll-shaped portion side of the packaging sheet that is pulled out to the predetermined length are cut. When the drawer mechanism that is equipped with a cutter and holds the end of the packaging sheet reaches the drawer position, the drawer mechanism is stopped at this drawer position and the cutter is operated to cut. When stopped at, a braking means is provided for braking the rotation of the roll-shaped portion of the packaging sheet.

[2] In the constitution of the above item [1], the supporting member is one on which the roll-shaped portion of the packaging sheet is placed, and is rotated together with the roll-shaped portion of the packaging sheet in association with the pulling-out operation of the pulling-out mechanism. And configure it to
The braking means brakes the support member.

[3] In the constitution of the above item [2], the driven gear for rotationally driving the support member, the gear teeth for meshing with the gear teeth of this driven gear to drive the gear teeth and the free rotation of the driven gear. It is equipped with a drive gear that has a notch that allows rotation, and a motor that drives this drive gear to rotate.When the drawer mechanism reaches the holding position, the motor is supported so that the end of the packaging sheet is extended toward the drawer mechanism. When the first drive control means for rotationally driving the member and the pulling mechanism holding the end portion of the packaging sheet start to move to the pulling position side, the notch portion of the driving gear faces the gear tooth of the driven gear, A second drive control means for operating the motor to allow free rotation of the support member is provided, and when the pullout mechanism stops at the pullout position, the gear teeth of the drive gear are engaged with the gear teeth of the driven gear, The support member so as to operate the motor to stop, have configured braking means.

[0008]

[I] In the case of the constitution as described in [1] above [1], for example, the pull-out mechanism 58 clamps the end portion 1b of the packaging sheet 1 at the clamping position shown in FIG. 9, and as shown in FIG. When the wrapping sheet 1 is started to be pulled out, the roll-shaped portion of the wrapping sheet 1 is rotated around the roll axis by the supporting action of the supporting member 56a. And FIG.
As shown in, when the pulling-out mechanism 58 pulls out the packaging sheet 1 on the packaging table by a predetermined length, the pulling-out mechanism 58 stops at that position. In this case, as shown in FIG. 12, the braking means is actuated at the same time as the pulling-out mechanism 58 is stopped, the rotation of the roll-shaped portion of the packaging sheet 1 is braked, and this roll-shaped portion delays the stop of the pull-out mechanism 58. To stop without. This prevents the packaging sheet 1 from waviness and large wrinkles between the drawing mechanism 58 and the roll-shaped portion. Therefore, the cutter operates to cut the wrapping sheet stretched substantially straight, so that the wrapping sheet is surely cut and the cut portion is clean without wrinkles.

[II] Assuming that the packaging sheet is mounted on the supporting member as in the above item [2], for example, as shown in FIG.
While the wrapping sheet 1 is being pulled out as shown in FIG.
a also rotates, and the packaging sheet 1 is smoothly pulled out without breaking in the middle. Then, as shown in FIG. 12, for example, when the pull-out mechanism 58 is stopped at the pull-out position, the support member 56a contacting the roll-shaped portion of the packaging sheet 1 from below is braked and the roll-shaped portion is stopped. The outer diameter of the roll-shaped part gradually decreases with the consumption of the packaging sheet.Therefore, if the roll-shaped part is in direct contact with the upper part for braking, the braking force will weaken as the outer diameter changes. It is possible to continue. On the other hand, in the present invention, even if the outer diameter of the roll-shaped portion changes, the support member is in contact with the lower side of the roll-shaped portion regardless of this, so if the support member is braked, it is always stable. The braking force can be applied to the roll-shaped portion from the support member.

[III] With the construction as described in [3] above, for example, as shown in FIG. 9, in order to pull out the packaging sheet 1 for the next packaging after the completion of one packaging, the drawer mechanism is used. When 58 moves to the holding position on the cutter side, the drive gear 65 is rotated by the motor 66 and the support member 5 is rotated.
The support member 56a is rotationally driven by engaging with the driven gear 62 of 6a (clockwise in FIG. 9). As a result, the end portion 1b of the packaging sheet 1 is fed so as to project toward the pull-out mechanism 58 side, and the projecting end portion 1b of the packaging sheet 1 is clamped by the pull-out mechanism 58, so that the packaging sheet 1 is clamped. Definitely done. Next, when the pull-out mechanism 58 starts pulling out the packaging sheet 1, for example, as shown in FIG.
As shown in FIG. 1, the drive gear 65 is rotated by the motor 66, and the cutout portion 65a thereof faces the gear teeth of the driven gear 62 of the support member 56a. As a result, the engagement with the drive gear 65 is achieved. The driven gear 62 and the support member 56a are disengaged so that they can freely rotate. As a result, the roll-shaped portion of the packaging sheet and the supporting member smoothly rotate as the packaging sheet is pulled out by the pulling-out mechanism, and the packaging sheet is smoothly pulled out without breaking in the middle.
Then, as shown in FIG. 12, for example, when the pull-out mechanism 58 reaches the pull-out position and stops, the drive gear 65 is rotationally driven by the motor 66 by a predetermined angle, and the drive gear 6 is driven.
When the gear teeth of No. 5 mesh with the driven gear 62, the motor 66 stops at this angle. Therefore, the supporting member 56a is stopped by the engaging action of the drive gear 65 and the driven gear 62 and the stopping action of the motor 66, and accordingly, the roll-shaped portion of the packaging sheet is also stopped.

As described above, the support member of the above item [3] has a function of feeding the packaging sheet when the pulling mechanism is held, a function of rotating the roll-shaped portion when the packaging sheet is pulled out, and smoothly pulling out the packaging sheet. It will have three sets of functions: braking on the roll-shaped part of the seat. Then, by providing a cutout portion in the drive gear for the support member and using the drive gear motor itself (particularly for the braking function), a structure for rotating and stopping the support member as described above is provided. It can be easily configured.

[0012]

According to the first aspect of the present invention, when the packaging sheet is pulled out to a predetermined length, the packaging sheet will not be wavy or have large wrinkles between the drawing mechanism and the roll-shaped portion. Therefore, the wrapping sheet is surely cut by the cutter, and the cut portion of the wrapping sheet is clean without wrinkles. Therefore, the subsequent packaging work and the subsequent withdrawal of the packaging sheet can be performed without any trouble, and the efficiency of the packaging device as a whole can be improved.

According to the present invention, the roll-shaped portion smoothly rotates when the packaging sheet is pulled out, and the packaging sheet can be pulled out without tearing in the middle,
It is possible to prevent defective drawing. And
Regardless of the change in the outer diameter of the roll-shaped part of the packaging sheet, a stable braking force can always be applied to the roll-shaped part, thus stabilizing the function of suppressing wrinkling and wrinkling of the packaging sheet when the drawing mechanism is stopped. Can be planned.

According to the third aspect of the present invention, the end portion of the packaging sheet can be reliably clamped by the drawer mechanism, the roll-shaped portion smoothly rotates, and the drawer of the packaging sheet does not break. When the drawing mechanism is stopped, it is possible to suppress the occurrence of waviness and wrinkles of the packaging sheet. As a result, the entire flow from the sandwiching of the packaging sheet to the pulling out and cutting is performed without any hindrance, malfunctions as a whole are prevented, and the efficiency of the packaging machine as a whole is further improved. You can Then, the above-mentioned malfunction prevention function is provided in one set of support members, and this support member can be operated as described above only by the drive gear and the motor, and the structure can be simplified. ..

[0015]

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 work in this packaging device is performed in the following steps. That is, the step of dropping the article A to be packed from above into the opening 2a of the packaging table 2 on which the packaging sheet 1 is placed (this is done by the operator), by dropping into the opening 2a. The step of wrapping the article A to be packaged with the packaging sheet 1 and supporting the article A to be packaged with the support table 3 below the packaging table 2, the upper side of the packaging sheet 1 enclosing the article A to be packaged on the support table 3 The step of narrowing down the part from the lateral direction, the step of cutting out the upper part of the narrowed down packaging sheet 1, the cut-out packaging sheet 1
Step of attaching the adhesive tape 4 to the portion, a step of pressing the attached adhesive tape 4 from above, a step of laterally ejecting the packaged object A from the support base 3, and a roll shape in preparation for the next packaging. The packaging sheet 1 wrapped around the
This 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 (corresponding to support members) and 56b, and the tip of the packaging sheet 1 is a pair of upper and lower. It is sandwiched between the delivery rollers 57a and 57b. On the support frame 61 extending from the support roller 56a on the right side of the drawing, the upper feeding roller 57a is provided.
Of the gear 6 fixed to the support roller 56a.
2 (corresponding to the driven gear) is the gear 63 of the support frame 61.
The transmission chain 64 is erected between the gear 63 and the feeding roller 57a. And the gear 62
It is configured to drive the support roller 56a and the payout roller 57a by rotating the drive gear 65 and the motor 66, and the other support roller 56b and the payout roller 57b are freely rotated.

Next, the first pedestal 67 and the second pedestal 68 that support the packaging sheet 1 from the lower side when the packaging sheet 1 is cut will be described. As shown in FIGS. 2 and 5, on the lower right side of the feeding rollers 57a and 57b in the plane of the drawing, a flat plate-shaped first pedestal 67 and second pedestal 68 having a width wider than the lateral width of the packaging sheet 1 are provided. The first pedestal 6 is provided at a predetermined interval (for a cutter 59 described later to enter).
The second pedestal 68 is set at a position slightly lower than the second pedestal 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 pedestals 67 and 68, and the support frame 70 is slidable vertically on the guide poles 69 via the boss portion 70a. It is supported. One drive shaft 82 is rotatably installed under the second pedestal 68, and the operation plate 8 is fixed to the left and right of the drive shaft 82.
2a and the left and right boss portions 70a of the support frame 70, and a link 83 is laid between them.
A transmission chain 85 is provided so as to span the drive shaft 82.

A flat plate-shaped cutter 59 having a width wider than the width of the packaging sheet 1 is fixed to the support frame 70, and a plate-shaped pressing member 60 having a width of about 1/2 of the packaging sheet 1 is a cutter. There are four in total, two on the front left and right of 59 and two on the rear left and right. Each holding member 6
A rubber material 60a is attached to the lower surface of 0, and each pressing member 60 is vertically movable on the support frame 70, and
It is provided in a state of being urged downward by the spring 60b. Then, as shown in FIG. 2, the rubber material 60 a of the pressing member 60 is set to project below the lower end of the cutter 59 when the support frame 70 is in the raised state.
With the above structure, when the drive shaft 82 is driven to rotate once 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 again as described later.

Next, the pull-out mechanism 58 for pulling out the packaging sheet 1 onto the packaging table 2 will be described. As shown in FIG. 2, the guide rails 2b are provided on both the left and right sides of the packaging table 2.
A pair of support plates 71 are slidably supported along the sprocket 72, and the sprocket 72 is supported on the left and right of the end on the second cradle 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 the sprocket 72, and the left and right chains 73 are connected to the left and right support plates 71. As a result, the left and right sprockets 72 on the second pedestal 68 side are driven in the forward and reverse directions by the motor 91 (see FIG. 18), so that the drawer mechanism 58 (left and right support plates 71) is slid along the packaging table 2. To do.

As shown in FIGS. 1, 2 and 6, a single support shaft 74 is provided over the left and right support plates 71, and five operation arms 58a are independently rocked on the support shaft 74. The rubber plate 5 is freely fitted on the back surface of the tip of the operation arm 58a.
8b is fixed. A flat plate-shaped pedestal 76 is erected and fixed on the lower side of the operation arm 58a across the left and right support plates 71. In this case, as shown in FIG. 2, the support plate 71 is located slightly below the second pedestal 68 on the cutter 59 side.
The pedestal 76 is set to be positioned. Then, one frame 75 laid across the left and right support plates 71
A spring 77 for urging each operation arm 58a toward the swinging side of the pedestal 76 is provided between the operation arm 58a and each operation arm 58a.

The support shaft 74 is rotatably supported with respect to the support plate 71, and as shown in FIGS.
Arms 74a are fixed to the left and right of
One rod 74b is erected and fixed across a. A link 79 is provided so as to span 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. There is. In the state shown in FIG. 2, the motor 80 is driven to pull down the rod 74b and each operation arm 5
8a is being lifted from the pedestal 76, 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 operation arm 58a to descend to the pedestal 76 side. The packaging sheet 1 is sandwiched between them.

(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. As will be described later, when the packaging sheets 1 having different widths are installed on the support rollers 56a and 56b, the center of the width of the roll-shaped portion of the packaging sheet 1 is located at the center of the widths of the support rollers 56a and 56b regardless of the width. That is, in other words, when the wrapping sheet 1 is pulled out by the pull-out mechanism 58 as described later, the second mark 1d of the wrapping sheet 1 shown in FIG. ..

As shown in FIG. 18, there are provided a cutting switch 93 capable of driving and operating only the motor 84 for the cutter 59, and a feeding switch 94 capable of driving and operating only the motor 66 for the support roller 56a and the feeding roller 57a. There is. When the cut switch 93 is pressed once,
The motor 84 operates from the state shown in FIG.
Descends, then rises to the original position again, and the motor 84 stops. The feeding switch 94 is biased to 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.

The vicinity of the first end of the packaging sheet 1 is shown in FIG.
In many cases, the unprinted extra portion such as the first mark 1c as shown in FIG. Therefore, the wrapping sheet 1 is installed, and the first end of the wrapping sheet 1 is provided with the upper and lower feeding rollers 57a,
When it is inserted between 57b, the feeding switch 94 is pushed and the extra portion of the packaging sheet 1 is fed. Then, the first first mark 1c is placed at a predetermined position (see FIG.
And, as shown in FIG. 12, when the end 1b of the packaging sheet 1 to be cut comes to a position reaching directly below the cutter 59), the feeding of the packaging sheet 1 is stopped, and the cutting switch 93 is pressed and operated. Cut off the excess and remove 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 onto the packaging table 2 will be described. When the packaging sheet 1 is installed as in the above (2) and the activation switch 95 of the packaging device shown in FIG. 18 is pressed, a single packaging operation as described later in (6) is performed. 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 will be idle.

The state shown in FIGS. 1 and 2 is a state in which one wrapping is completed, and the pulling-out mechanism 58 causes the cutter 59 to pull out the wrapping sheet 1 for the next wrapping onto the wrapping table 2.
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), the drive is performed. The gear 65 is driven to rotationally drive the support roller 56a in the clockwise direction, and the delivery roller 57a is rotationally driven in the counterclockwise direction to deliver the end portion 1b of the packaging sheet 1 from the second pedestal 68 to the pull-out mechanism 58 side. (Corresponding to the first drive control means).

The drive gear 65 makes one rotation, and the notch portion 65a (see FIG. 2) of the drive gear 65 having no gear teeth becomes the gear 62.
Motor 66 is stopped, the support roller 56a is stopped.
The feeding roller 57a also stops. In this state, as shown in FIG. 9, the end portion 1b of the packaging sheet 1 sufficiently enters between the operation arm 58a of the drawer mechanism 58 and the pedestal 76, so that the motor 80 of the drawer mechanism 58 operates next. The rod 74b is pulled up, and the operating arms 58a are lowered toward the pedestal 76 by the urging force of the springs 77.
As shown in 0, the end portion 1b of the packaging sheet 1 is held between the operation arms 58a and the pedestal 76.

Next, as shown in FIG. 11, the pull-out mechanism 58 moves to the right side of the drawing with the end portion 1b of the packaging sheet 1 held therebetween, and the packaging sheet 1 is pulled out onto the packaging table 2. In this case, the cutout portion 65a of the drive gear 65 has the gear 6
Since the gear 62 is in a state of being able to freely rotate in opposition to 2, the gears 62, 63, the support roller 56a,
56b and the feeding rollers 57a, 57b freely rotate as shown in FIG. 11 with the withdrawal of the packaging sheet 1 (corresponding to second drive control means).

As shown in FIG. 7, the packaging sheet 1 is transparent, but the first mark 1c indicating the type and manufacturer of the article A to be packaged 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 away from the center of the first mark 1c along the lateral width direction by a first predetermined distance L1 and at a position away from the center of the first mark 1c by a second predetermined distance M1 in the longitudinal direction. .. As shown in FIGS. 1 and 7, a frame 86 fixed to the packaging table 2 is provided with a reflective optical sensor 87 including a light emitter and a light receiver.

With the above-described structure, the packaging sheet 1 is pulled out by the pulling-out mechanism 58, and the packing sheet 1 shown in FIGS.
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 by the second mark 1d and detected by the light receiver of the optical sensor 87. Then, its position (corresponding to the drawer position)
Then, the drawer mechanism 58 is temporarily stopped. In this case, FIG.
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 (corresponding to braking means). ). As a result, the gears 62, 63, the support rollers 56a, 56b, and the feeding roller 57, which are freely rotated when the packaging sheet 1 is pulled out.
When a and 57b are also stopped, the rotation of the roll-shaped portion of the packaging sheet 1 is stopped at the same time as the pull-out mechanism 58 is stopped, and the roll-shaped portion of the packaging sheet 1 and the pull-out mechanism 58 are stopped.
There is no wrinkling or wrinkling between

Next, as shown in FIG. 13, the supporting frame 70 provided with the cutter 59 and the pressing member 60 is operated to descend (corresponding to control means). In this case, as shown in FIG. 2, the rubber material 60a of the pressing member 60 projects downward from the lower end of the cutter 59, so when the support frame 70 is lowered, first, the four pressing members before and after the cutter 59 are pressed. The member 60 transfers the packaging sheet 1 to the first and second pedestals 67,
The packaging sheet 1 is held by pressing against 68. Next, the cutter 59 enters between the first and second pedestals 67 and 68 to cut the packaging sheet 1 at a stretch. When the wrapping sheet 1 is pulled out and cut in this manner, the first mark 1c is located at the center in the longitudinal direction of the cut wrapping sheet 1 as shown in FIG.

When the cutting of the packaging sheet 1 is completed in the state shown in FIG. 13, the supporting frame 70 having the cutter 59 and the pressing member 60 is operated to move up to the original position,
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 table 2 (see FIG. 7B). After that, each operation arm 58a of the drawer mechanism 58 is attached to the pedestal 7
The end portion 1b of the packaging sheet 1 is lifted up from 6 and the one packaging sheet 1 cut into a predetermined length is placed on the packaging table 2.

As shown in FIGS. 1 and 18, the second pedestal 6
The sprocket 72 on the eighth side is provided with a potentiometer 88 to detect the position of the pull-out mechanism 58. In this case, an operation of stopping when the pull-out mechanism 58 reaches the holding position (see FIG. 9) which is the position of the second pedestal 68, and
Two operations of stopping when the first mark 1c of the cut packaging sheet 1 reaches the position (see FIG. 7B) at which the pull-out mechanism 58 moves until it reaches the position of the opening 2a of the packaging table 2. Is based on the detection signal from the potentiometer 88. Then, as shown in FIG. 7A, when the packaging sheet 1 is pulled out to a length to be cut (corresponding to the pulling position), the operation of stopping the pulling mechanism 58 is
It 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 and 8 having three types of width, large, medium and small
9, 90, the first mark 1c, 89a, 90a, at the center 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 wrapping 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 spacing M1, and the packaging sheet 89 having a medium width has a second predetermined spacing M2.
The packaging sheet 90 having a small width has the second predetermined interval M3.

The position of the optical sensor 87 on the packaging device side does not change with respect to the packaging sheets 1, 89 and 90 described above.
Therefore, as shown in FIG. 8, when the wrapping sheets 1, 89, 90 are pulled out by the pulling-out mechanism 58, the position at which the pulling-out mechanism 58 is stopped based on the detection of the optical sensor 87, that is, the wrapping sheets 1, 89, 90. End 1b of the
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.

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

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. 18 in advance to select the selected packaging sheet 1. , 89, 90 is the distance N
1, N2, N3 are selected and set. As a result, after the cutting, the pulling-out mechanism 58 is moved by the distance N1, N2, N3 suitable for each wrapping sheet 1, 89, 90, and the first mark 1c of each wrapping sheet 1, 89, 90,
89a and 90a are located in the opening 2a 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.
A description will be given based on 0. As shown in FIG. 9, it is assumed that the one-time wrapping is completed and the pull-out mechanism 58 returns to the holding position. In this case, since the operation arm 58a of the pull-out mechanism 58 enters directly below the optical sensor 87, the detection light from the light emitter is reflected and the optical sensor 87 enters 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 When it is determined that the potentiometer 88 is abnormal, the packaging is temporarily stopped and the buzzer sounds (step S3).

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

Next, as shown in FIG. 11, the pull-out mechanism 5
It is assumed that 8 normally holds the end portion 1b of the packaging sheet 1 and pulls out the packaging sheet 1 to the right side of the drawing. in this case,
The potentiometer 88 detects that the pull-out mechanism 58 has passed a predetermined position on the side of the cutter 59 slightly on the left side of the drawing with respect to the position where the end 90c of the small-width packaging sheet 90 is pulled out (the position of the end 90c in FIG. 8). Then, if each part is normal, within a predetermined time thereafter, the drawer mechanism 5
8 is an end portion 1b of the packaging sheets 1, 89 and 90 shown in FIG.
89c, 90c position is reached, packaging sheets 1, 89, 9
The second marks 1d, 89b, 90b of 0 are the optical sensors 87.
Will be reached directly below.

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

Next, it is assumed that the pull-out mechanism 58 has passed the above-mentioned predetermined position (step S5), and after the elapse of a predetermined time (step S6), the optical sensor 87 is turned on. In this case, the drawer mechanism 58 is stopped at the positions of the ends 1b, 89c, 90c of the packaging sheets 1, 89, 90 shown in FIG. 8, and when the cutting of the packaging sheets 1, 89, 90 is completed, the drawer mechanism 58 is shown. Moves a distance N1, N2, N3. Then, if the stop position of the pull-out mechanism 58 is at the position of the end portion 1b, after that, it moves by the distance N1.
That is, the position of the end 1b and the distance N1, the position of the end 89c and the distance N2, and the position of the end 90c and the distance N3 correspond to each other.

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 as described above, the position where the drawer mechanism 58 is stopped,
Distances N1, N2 set by the selection switch 92
It may be different from N3 (step 13). Therefore, when the packaging in such a state is performed several times continuously (steps S14 and S15), the packaging is temporarily stopped and the buzzer sounds (step S16).

(6) After the one wrapping sheet 1 cut into a 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. 15 (a), first, when the article A to be packaged is dropped into the opening 2a of the packaging table 2, the article A to be packaged is dropped 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, a 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 auxiliary squeezing member 11 is configured to further squeeze the packaging sheet 1.

Next, the pair of plate-shaped holding members 14 arranged on the lower side of the packaging table 2 are shown in FIGS.
As shown in (a), it proceeds to the side of the packaging sheet 1 and narrows down the upper portion 1a of the packaging sheet 1. As a result, the article A to be packaged is substantially completely wrapped in the packaging sheet 1. After this, as shown in FIG. 16A, a pair of disc cutters 2
8 advances along the upper surface of the sandwiching member 14, and the upper portion 1a of the packaging sheet 1 is cut off.

Next, as shown in FIG. 16B, the adhesive tape 4 cut into a predetermined length is placed over the upper end of the packaging sheet 1 and the end of the sandwiching member 14, and the adhesive tape 4 shown in FIG. As shown in, the sponge member 47 presses the adhesive tape 4 from above. Then, while the adhesive tape 4 is being pressed by the sponge 47, as shown in FIG. 17A, the pair of holding members 14 are operated to be opened, and the sponge member 47 is again pressed to the side of the article A to be adhered. Make sure that the tape 4 is firmly attached to the packaging sheet 1.

After that, as shown in FIG. 17B, the posture of the support base 3 is changed sideways, and the article A to be packaged is transferred to the side slide 55 and discharged outside the apparatus. The state of the object A to be packaged thus completed is shown in FIG.
Shown in. When one wrapping is completed as described above, the process returns to the item (3) and the next wrapping sheet 1 is pulled out and cut.

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 drawings]

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

FIG. 2 is a side view of the supporting structure of the roll-shaped portion of the packaging sheet, the cutter and the pressing member, and the vicinity of the drawing mechanism.

FIG. 3 is a side view showing a lifting structure of a cutter and a pressing member.

FIG. 4 is a front view showing a lifting structure for a cutter and a pressing member.

FIG. 5 is a plan view of the roll-shaped portion of the packaging sheet and the vicinity of the feeding roller.

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

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

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

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

FIG. 10 is a side view showing a state where the pulling-out mechanism holds the end portion of the rolled-out packaging sheet.

11 is a side view showing a state where the pulling-out mechanism pulls out the packaging sheet from the state of FIG.

FIG. 12 is a side view showing a state where the second mark on the packaging sheet is detected by an optical sensor and the pulling-out mechanism is stopped.

FIG. 13 is a side view showing a state where the cutter is cutting the packaging sheet after the state shown in FIG. 12;

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

FIG. 15 is a perspective view showing a flow of packaging from insertion of the packaged object into the opening to narrowing down of the packaging sheet by the sandwiching member.

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

FIG. 17 is a perspective view showing a packaging flow from the opening operation of the holding member to the discharging of the packaged article and a state in which the 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 the first half flow of control of abnormality detection when the packaging sheet is pulled out.

FIG. 20 is a flowchart showing the latter half of the flow of control for abnormality detection when pulling out a packaging sheet.

FIG. 21 is a perspective view showing a conventional structure for pulling out a packaging sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging sheet 1b Edge of packaging sheet 2 Packaging table 2a Opening of packaging table 56a Support member 58 Drawing mechanism 59 Cutter 62 Driven gear 65 Drive gear 65a Notched portion of drive gear 66 Motor A Packaged object

Claims (3)

[Claims] 1. A packaging sheet (1) cut into a predetermined length.
Opening hole (2) for placing the spherical object (A)
The packaging table (2) provided with a) is provided, and when the article to be packaged (A) is dropped into the opening (2a) from above, the packaging table (2) is placed on the outer edge of the opening (2a). Packaging sheets for (1)
A packaging device configured such that the object to be packaged (A) is wrapped in a packaging sheet (1) by squeezing the packaging sheet (1), and the packaging sheet (1) rolled into a roll is provided around the roll axis. A support member (56a) that supports the rotation freely
And a clamping position for clamping the end portion (1b) of the packaging sheet (1) and the roll-shaped portion of the packaging sheet (1) while rotating the sandwiched packaging sheet (1) on the packaging table (2). A pull-out mechanism (58) reciprocally movable over a pull-out position for a predetermined length, and a cutter (59) for cutting a predetermined position on the roll-shaped portion side of the packaging sheet (1) pulled out to a predetermined length. When the pull-out mechanism (58) holding the end portion (1b) of the packaging sheet (1) reaches the pull-out position, the pull-out mechanism (58) is stopped at this pull-out position, and the cutter (5)
9) A control device for cutting and operating the packaging device, and a braking device for braking the rotation of the roll-shaped portion of the packaging sheet (1) when the drawer mechanism (58) is stopped at the drawing position. .. 2. The support member (56a), on which a roll-shaped portion of the packaging sheet (1) is placed, and the packaging sheet (1) being pulled out by the pulling-out mechanism (58). The packaging apparatus according to claim 1, wherein the packaging means is configured to rotate together with the roll-shaped portion, and the braking means applies braking to the support member (56a). 3. A driven gear (62) for rotationally driving said support member (56a), a gear tooth for meshing with a gear tooth of this driven gear (62) and rotationally driving it, and a driven gear (62). ) Is provided with a drive gear (65) having a notch (65a) allowing free rotation, and a motor (66) for rotationally driving the drive gear (65), and the pull-out mechanism (58).
When the sheet comes to the holding position, the end (1) of the packaging sheet (1) is
so that b) is paid out to the drawer mechanism (58) side,
The first drive control means for rotationally driving the support member (56a) by the motor (66) and the pull-out mechanism (58) holding the end portion (1b) of the packaging sheet (1) start moving to the pull-out position side. And the notch (65a) of the drive gear (65) opposes the gear teeth of the driven gear (62) to operate the motor (66) to allow free rotation of the support member (56a). And a second drive control means for causing the drive mechanism (58) to stop at the pull-out position so that the gear teeth of the drive gear (65) are engaged with the gear teeth of the driven gear (62) to support the support. Material (5
The braking means is constructed so as to operate the motor (66) so as to stop 6a).
The packaging device described.