JP2679911B2 - Automatic 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 an automatic packaging system in which a large number of packaging containers such as trays used for packaging foods and the like are stacked and the whole can be packaged with a synthetic resin film. Regarding the device.

[0002]

2. Description of the Related Art Packaging containers molded of synthetic resin foam are useful for packaging foods such as meat, fish and vegetables because they are convenient and inexpensive, and are useful in supermarkets and fast foods. Used in large quantities in shops. However, when a large number of these packaging containers are stacked, they are easy to lift because they are light in weight, but their volume is larger than their weight, making them difficult to carry and easily collapsed during transportation. . Therefore, the packaging containers are transported as one packaging unit in which, for example, a stack of 50 or 100 sheets of packaging containers is wrapped with a synthetic resin film.

However, the packaging work of a large number of stacked packaging containers has been performed manually because an automatic device for performing most of the steps continuously and automatically has not been provided. In this packaging work, a bag of synthetic resin films with one opening is placed on a packaging container that is vertically stacked,
With the packaging container kept inside the bag of synthetic resin film, it is turned upside down and the opening of the bag is heat-welded with a heater or the like. As a result, a large number of packaging containers are stacked and packaged in one unit.

[0004]

However, in the above packaging work, the operation of inserting the packaging container into the bag-shaped synthetic resin film, the operation of holding the packaging container wrapped with the synthetic resin film for heat welding, and The work of thermally welding the opening of the synthetic resin film with a heater or the like is performed manually. Therefore, the packaging work of a large number of packaging containers has a problem that the workability is poor and the productivity is not improved.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic packaging device capable of automatically packaging a large number of stacked packaging containers with a synthetic resin film.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an automatic packaging apparatus of the present invention is provided with a feeding means for conveying a large number of stacked packaging containers and a feeding means attached to the downstream side of the feeding means. A mounting plate on which the packaging container conveyed by the means is mounted, and an insertion having an extruding portion that is reciprocally mounted on the upper surface of the mounting plate and that pushes out the packaging container mounted on the mounting plate. The device and the side for receiving the packaging container are opened, and a space is provided to wrap the packaging container placed on the placing plate, and the device is folded in half along the longitudinal direction so as to sandwich the placing plate from above and below. Arranged, a thermoplastic synthetic resin film for packaging that moves in the extrusion direction of the extrusion unit, a suction mechanism that pulls the synthetic resin film in a state of wrapping the packaging container inward on the opening side, Wrap the packaging container inside Opening of he synthetic resin film and the direction perpendicular to the longitudinal direction of the synthetic resin film, are those comprising a bonding means for thermally welded, and a discharging means for discharging the packaging container after packaging.

[0007]

According to the automatic packaging apparatus having the above construction, the supply means can convey, for example, a large number of stacked packaging containers in a lateral direction. Since the mounting plate of the insertion device is attached to the downstream side of the supply means, the packaging container conveyed by the supply means can be mounted.

Since the push-out portion of the insertion device is reciprocally attached to the upper surface of the placing plate, the packaging container placed on the placing plate in a state of being wrapped inside the synthetic resin film. Can be pushed out. The synthetic resin film is arranged in a two-fold state along the longitudinal direction so as to sandwich the upper and lower sides of the mounting plate with a space for wrapping the packaging container, and since the side for inserting the packaging container is opened,
The packaging container can be wrapped.

The suction mechanism can pull the opening side of the synthetic resin film with the packaging container wrapped inside by the insertion device. The adhesive means can heat-weld the opening of the synthetic resin film that wraps the packaging container inside and the direction orthogonal to the longitudinal direction of the opening. The discharging means can discharge the packed packaging container.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a schematic plan view showing an automatic packaging device according to an embodiment of the present invention.
FIG. 3 is a perspective view showing a main part of the automatic packaging device. This automatic packaging device includes a supply conveyor 1, an insertion device 2 having a mounting plate 21 and an extrusion unit 22, a material supply unit 30 on which a thermoplastic synthetic resin film 3 in a rewound state is arranged, a suction guide unit 4, A sealing device 7 and a discharge conveyor 8 are provided.

The packaging container A has, for example, 50 sheets or 1
The sheets are stacked in units of 00, and are placed on the supply conveyor 1 in a plurality of rows in a horizontal state. The supply conveyor 1 is normally rotated in the direction of the insertion device 2 by a drive motor (not shown). The supply conveyor 1 can be reversed so that a space is provided between the first row and the second row when the frontmost packaging container A is supplied to the insertion device 2. The distance between the packaging containers A in the first and second rows on the supply conveyor 1 is
It is sufficient if there is about one row of packaging containers A. Supply conveyor 1
Is a pair of U-shaped supporting portions 1 that straddle the supply surface of the conveyor.
1 and 11 are provided. A pair of guide plates 12, 12 which are slidable and elongated in the transport direction are supported by both support portions 11, 11. Support parts 11, 11 and guide plates 12, 12
Air cylinders 13 and 13 are attached between and. These air cylinders 13 and 13 perform forward / backward movements in conjunction with the rotation of the supply conveyor 1. The guide plates 12 and 12 are arranged in such a manner that both ends in the stacking direction of the packaging containers A arranged in rows are lightly held.
The guide plates 12 and 12 prevent the stacked packaging containers A from collapsing laterally of the supply conveyor 1. On the upstream side of the supply conveyor 1, a push button switch 14 for an operator to start and stop the automatic packaging device.
Is also installed, and an indicator light 15 for displaying the operation is also provided in parallel.

The insertion device 2 is arranged on the downstream side of the supply conveyor 1 and is supported integrally with the support base of the supply conveyor 1. The insertion device 2 has a rectangular mounting plate 21.
A push-out portion 22, two alignment rods 23, 23, a support rod 24 having a thread groove, and a positioning plate 25. The mounting plate 21 is attached such that the longitudinal direction thereof faces the downstream side of the supply conveyor 1 so that the packaging container A conveyed by the supply conveyor 1 can be mounted.
The alignment bars 23, 23 are attached between the mounting plate 21 and the supply conveyor 1 so that the packaging container A can be smoothly moved from the supply conveyor 1 to the mounting plate 21. Alignment bar 2
3, 23 are connected to a pair of sliding portions 26, 26 that move vertically and horizontally. When the packaging container A is supplied from the supply conveyor 1 to the mounting plate 21, the alignment rod 2
Sliding parts 26, 26 connected to 3, 23 move upward and then horizontally, so that the packaging container A is pressed against the positioning plate 25 (see FIG. 3). . The push-out portion 22 is arranged at one end of the upper surface of the mounting plate 21 so that the upper surface of the mounting plate 21 can reciprocate in the longitudinal direction of the mounting plate 21. When the packaging container A is placed on the placing plate 21, the pushing portion 22 reciprocates on the upper surface of the placing plate 21 and sends it to the discharge conveyor 8 side described later (see FIG. 4).
The support rod 24 is arranged in parallel with the surface of the mounting plate 21 on the opposite side of the mounting plate 21 to which the pushing portion 22 is attached. The positioning plate 25 is a packaging container A supplied to the mounting plate 21.
Is arranged along the longitudinal direction of the mounting plate 21 on the side opposite to the supply conveyor 1 so that the positioning can be performed. The positioning plate 25 can be slid on the mounting plate 21 in a direction orthogonal to the surface thereof and can be adjusted according to the size of the packaging container A.

The material supply section 30 is arranged behind the pushing section 22 of the insertion device 2. The material supply unit 30 includes a pair of winding and anti-supporting rollers 34, 34 and a pair of guide rollers 35, 35. The synthetic resin film 3 is wound around the supply roll 31 in a state of being folded in half in the longitudinal direction. The unwound synthetic resin film 3 is supported by the unwound supporting rollers 34, 34. The synthetic resin film 3 is supplied from the material supply unit 30 to the insertion device 2 by the guide rollers 35, 35. In the synthetic resin film 3, the upper film piece 32 pulled out from the guide rollers 35, 35 is passed above the mounting plate 21, and the lower film piece 33 pulled out from the supply roll 31 is passed below the mounting plate 21. Has been done. The upper film piece 32 is supported by the push-out portion 22 and the support rod 24 so as to be separated upward from the mounting plate 21. The lower film piece 33 is passed upward from the end portion of the placing plate 21 on the discharge conveyor 8 side and is fitted to the upper film piece 32. Therefore, the packaging container A supplied to the mounting plate 21
Will be wrapped inside the folded synthetic resin film 3.

The suction guide portion 4 is arranged on the opening side of the synthetic resin film 3 and is attached along the side of the discharge conveyor 8. The suction guide portion 4 is connected to an air pump (not shown) through the duct 41, and the automatic packaging device is in operation or the packaging container A is in the discharge conveyor 8
The air is sucked at the timing when it is being transported to. The suction guide portion 4 has an opening on the discharge conveyor 8 side, and can suck the side portions on the opening side of the film pieces 32, 33 conveyed to the discharge conveyor 8. According to the suction guide portion 4, since the opening-side tips of the upper and lower film pieces 32 and 33 are pulled when the opening side of the synthetic resin film 3 is heat-welded, it is useful for surely sealing the synthetic resin film 3. (See FIG. 6).

The sealing device 7 includes a U-shaped arm 70 and an L-shaped seal receiving portion 71. The heat welding of the synthetic resin film 3 enclosing the packaging container A is performed on the discharge conveyor 8. The arm 70 is rotatably supported by the base 9 on a shaft 91 parallel to the carrying direction of the discharge conveyor 8. The arm 70 is attached with a heater formed in an L shape by the first seal portion 72 and the second seal portion 73. The first seal portion 72 includes a cutting portion 74 that cuts the synthetic resin film 3 in the width direction, and a heater portion 76 that welds the synthetic resin film 3 on both sides of the cutting portion 74. With the first seal portion 72, the width direction of the synthetic resin film 3 located at the boundary between the mounting plate 21 of the insertion device 2 and the discharge conveyor 8 can be heat-welded and cut. The second seal portion 73 includes a heater portion 77 that welds the opening-side tips of the upper and lower film pieces 32 in the longitudinal direction, and a cutting portion 75 that cuts an ear portion that is an unnecessary portion on the tip side. According to the second seal portion 73, the upper and lower film pieces 3
It is possible to heat-weld and cut along the tip of the opening 2 side. The L-shaped seal receiving portion 71 is attached from a boundary portion between the insertion device 2 and the discharge conveyor 8 to a side of the discharge conveyor 8 where the suction guide portion 4 is arranged. The L-shaped seal receiving portion 71 contacts the inner surface 78, 79 of the L-shaped seal receiving portion 71 when the packaging container A is sent from the insertion device 2 onto the discharge conveyor 8. Since they are in contact with each other, they are also used for positioning the packaging container A. The arm 70 is rotated upward and is in a standby state except during the sealing operation. During the sealing operation, the shaft 91 drives the arm 70 to move down, and the first seal portion 72 and the second seal portion 73 rotate until they come into contact with the L-shaped seal receiving portion 71. It can be heat-welded.

The discharge conveyor 8 is provided at substantially the same height as the mounting plate 21 of the insertion device 2. Discharge conveyor 8
Is rotatable in the length direction of the second seal portion 73, and discharges the packaging container A after being packaged by the sealing device 7. On the side of the discharge conveyor 8, in addition to the suction guide section 4, two rings 81, 82 for preventing the lateral displacement of the ears from which the synthetic resin film 3 is discharged are attached. The ear portion of the synthetic resin film 3 to be discharged has a winding portion (not shown) arranged below the ring 82, and winds the ear portion.

When the packaging container A is sent from the insertion device 2 to the discharge conveyor 8, the container holding plate that pushes the upper part of the packaging container A and the synthetic resin film 3 on the insertion device 2 side is movable. A film holding plate or the like that presses in the width direction may be provided. In this case, the packaging container A can be held, and the synthetic resin film 3 can be prevented from being displaced and reliably sealed.

Further, an L-shaped stay 100 may be attached to the inner side surface 78 of the arm 70, and a holding plate 101 may be attached to the tip of this stay 100 via a spring material or the like (FIG. 7).
reference). In this case, since the holding container 101 can press the packaging container A when the arm 70 descends, it is possible to more reliably prevent the packaging container A from moving during heat welding.

Further, on the other side portion of the discharge conveyor 8, a support plate 102 is attached in the longitudinal direction of the discharge conveyor 8 for supporting the packaging container A so as not to laterally shift when the sealing device 7 operates. Good (see Figure 7). Like the positioning plate 25 of the insertion device 2, the support plate 102 is also configured to be adjustable in the direction orthogonal to the transport direction of the discharge conveyor 8 so as to cope with the case where the packaging container A has a different size.

The wrapping operation of the packaging container A by the above automatic wrapping device will be described. With reference to FIGS. 2 to 6, for example, a stack of packaging containers A in units of 50 or 100 sheets is placed sideways, and a plurality of rows are provided on the supply conveyor 1 according to the transport length of the supply conveyor 1. And is placed between the guide plates 12, 12 (see FIG. 2). On the other hand, the synthetic resin film 3 is pulled out from the supply roll 31, the upper film piece 32 is sent to the L-shaped seal receiving portion 71 through the upper side of the placing plate 21, and at the same time, the lower film piece 33 is placed on the placing plate. The film pieces 32 and 33 are pulled out from between the mounting plate 21 and the L-shaped seal receiving portion 71 onto the discharge conveyor 8 through the lower side of the film 21, and the film pieces 32 and 33 are put together (see FIG. 2). Then, only at the start of the work, the sealing device 7 is driven once in this state to thermally weld the tip of the synthetic resin film 3 in the lateral direction. The upper film piece 32 includes the extruded portion 22 and the support rod 2 arranged in parallel with the extruded portion 22.
It is arranged at a position spaced apart from the mounting plate 21 by 4 and is prepared for insertion of the packaging container A. Next, when the supply conveyor 1 is driven, the supply conveyor 1
Starts forward rotation in a state in which the packaging containers A are placed in several rows, and the guide plates 12 and 12 reciprocate in association with the rotation, so that the packaging container A in the foremost position is placed on the mounting plate 21. When it is supplied to, the detection signal is output from, for example, an optical sensor and the supply conveyor 1 reverses based on this signal to return the packaging containers A in the second and subsequent rows to a position slightly apart from the insertion device 2.
At the same time, the guide plates 12 and 12 also reciprocate to return to their original positions. When the packaging containers A in the second and subsequent rows are slightly separated from the insertion device 2, the sliding portions 26, 26 are driven and the alignment rod 2 is moved.
3, 23 move upward and horizontally, and the packaging container A on the mounting plate 21 is pressed against the positioning plate 25 to be aligned (see FIG. 3). When the alignment of the packaging containers A is completed, the aligning rods 23, 23 return to their original positions, the pushing section 22 is driven, and the packaging containers A on the mounting plate 21 are pushed out in the direction of the discharge conveyor 8 (Fig. 4). When the push-out section 22 is fully moved, the packaging container A moves onto the discharge conveyor 8 in a state in which the upper part and the lower part are substantially wrapped with the synthetic resin film 3. Both film pieces 32, 33 of the synthetic resin film 3
The tip end of the opening is placed on the L-shaped seal receiving portion 71 and is pulled by the suction guide portion 4. At this time, the sealing device 7 is driven to drive the synthetic resin film 3
At the same time that the opening portion of the synthetic resin film 3 is thermally welded and cut by the second seal portion 73 and the L-shaped seal receiving portion 71, the lateral direction of the synthetic resin film 3 is changed by the first seal portion 72 and the L-shaped seal receiving portion 71. Heat welded and cut. Then, when the thermal welding and cutting of the synthetic resin film 3 are completed, the discharge conveyor 8 is driven and the packaged packaging container A is discharged. The cut ear portion is wound by the suction guide portion 4 and the rings 81 and 82 along with the movement of the discharge conveyor 8 on the winding portion provided below without causing lateral displacement. Therefore, the synthetic resin film 3
One of the longitudinal directions is continuous by folding in two, and the other is welded, and both of the front and rear lateral directions of the packaging container A are welded. Therefore, the inserted packaging container A has this synthetic resin film. It is packaged as a unit of 3 by 3, and can be carried without breaking even when the packaging containers A in which a large number are stacked are transported. Further, when this automatic packaging device is used, when the packaging container A is packaged, only the stacked packaging containers A are placed on the supply conveyor 1, and the synthetic resin film 3 automatically performs the packaging. it can. Therefore, the work of supplying the packaging container A is only manually performed, and the packaging of a large number of stacked packaging containers A can be efficiently performed. The packaging container A
The human power can be saved by using an automatic stacking device or the like, and the process from the supply of the packaging container A to the packaging can be entrusted to the automatic device. In the case of the supply by the automatic stacking device or the like, when the packaging containers A stacked at a constant interval are supplied, there is also an effect that the reverse operation of the supply conveyor 1 as described above becomes unnecessary. Regarding the direction in which a large number of packaging containers A are placed on the supply conveyor 1, although the stacked packaging containers A are placed sideways with respect to the conveying direction of the supply conveyor 1 in the above-described embodiment, they are arranged in the same direction as the conveying direction. You can also put it. In addition, various design changes can be made without changing the gist of the present invention.

[0021]

As described above, according to the automatic packaging apparatus of the present invention, when the stacked packaging containers A are packaged into one, the packaging work is automated and the workability is improved.
Further, even if the volume is increased by stacking a large number of packaging containers A, since it can be carried with the packaged synthetic resin film, it has an excellent effect such as easy transportation.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an automatic packaging device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the automatic packaging device of FIG.

FIG. 3 is a perspective view showing a packaging process of the automatic packaging device of FIG.

FIG. 4 is a perspective view showing a packaging process of the automatic packaging device of FIG.

5 is a perspective view showing a sealing process of the automatic packaging device in FIG. 1. FIG.

FIG. 6 is a side view showing a sealing process of the automatic packaging device of FIG.

FIG. 7 is a perspective view showing a part of another embodiment of the present invention.

[Explanation of symbols]

 1 Supply Conveyor 2 Insertion Device 21 Placement Plate 22 Extrusion Part 3 Synthetic Resin Film 4 Suction Guide Part 7 Sealing Device 8 Discharge Conveyor

Claims (1)

(57) [Claims] 1. A supply means for conveying a large number of stacked packaging containers, a mounting plate mounted on the downstream side of the supply means, for mounting the packaging containers conveyed by the supply means, and the mounting plate. An insertion device that has a top surface of a plate reciprocally attached and that has an extrusion unit that pushes out the packaging container placed on the mounting plate, and the side that receives the packaging container is opened and placed on the mounting plate. A thermoplastic synthetic resin for packaging which is arranged in a two-fold state along the longitudinal direction so as to sandwich the upper and lower sides of the placing plate with an interval for enclosing the packaged packaging container, and which moves in the extrusion direction of the extruding section. A film, a suction mechanism for pulling the synthetic resin film in the state of wrapping the packaging container inward, and an opening of the synthetic resin film wrapping the packaging container inward and the synthetic resin film In the longitudinal direction of An automatic packaging apparatus comprising: an adhesive means for heat-welding in a direction orthogonal to each other and a discharging means for discharging a packaging container after packaging.