JP2023171030A - Bag removal device - Google Patents

Abstract

To provide a bag removal device to enable further reliable bag removing operation.SOLUTION: A bag removal device that removes bags from a package in which a content is packaged in the bags includes a main conveyor that conveys the package, a cutter mechanism that has a cutter that cuts at least parts of the bags of the package while being conveyed on the main conveyor, and a roller mechanism that separates and discharges the bags from the package after the bags are cut by the cutter. The roller mechanism includes a first roller provided with gears therearound, and a second roller provided with gears therearound and engaged with the first roller, and the bags are sent out through the first roller and the second roller that are rotating.SELECTED DRAWING: Figure 1

Description

The present invention relates to a bag removing device, and particularly to a bag removing device that removes a bag from a package whose contents are packaged in a bag.

When removing the contents contained in the bag from the package, manual work is laborious and time consuming, and the greater the amount, the greater the burden on the operator. On the other hand, in the case of foods such as meat, it is necessary to remove the bag without significantly damaging the contents.

For example, Patent Document 1 describes a conveyor that conveys a package, a cutter that cuts open a bag by coming into contact with a package that is being conveyed on the conveyor, and a cutter that cuts a bag open above the conveyor so that it comes into contact with the package that has been cut open. The rollers rotate around an axis diagonally intersecting the conveyance direction of the package being conveyed by the conveyor, and the conveyor and rollers sandwich the bag and convey it in the conveyance direction. , discloses a bag removal device that transports the contents in a direction crossing the transport direction and separates the bag from the contents.

Patent No. 5833785

However, in Patent Document 1, since the bags are sandwiched between the rollers and the conveyor, it becomes easy to slip between the rollers and the conveyor, and there is a possibility that the bag removal operation cannot be performed reliably. In particular, if oil from foods such as meat adheres to rollers or conveyors, this tendency is highly likely to occur.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a bag removal device that enables more reliable bag removal work.

In order to achieve the above object, one of the representative bag removing devices of the present invention is a bag removing device that removes a bag from a package whose contents are packaged in a bag, and which transports the package. a main conveyor; a cutter mechanism having a cutter that cuts at least a portion of the bag of the package during conveyance on the main conveyor; and after the bag is cut by the cutter, the bag is separated from the package and discharged. The roller mechanism includes a first roller provided with a gear around the periphery, and a second roller provided with a gear around the periphery and meshes with the first roller, and the bag is rotated. A bag removal device characterized in that the bag is discharged by passing between a first roller and the second roller.

According to the present invention, more reliable bag removal work can be performed in the bag removal device.
Problems, configurations, and effects other than those described above will be clarified by the following embodiments.

FIG. 1 is a top view showing an example of the basic configuration of the bag removal device of the present invention. FIG. 1 is a side view showing an example of the basic configuration of the bag removal device of the present invention. FIG. 2 is a top view showing an example of the bag removal device of the present invention including a motor. FIG. 1 is a front view showing an example of the bag removing device of the present invention including a motor. It is a side view showing an example of the roller mechanism of the bag removal device of the present invention. It is a sectional view showing an example of the roller part of the bag removal device of the present invention. It is a side view showing an example of the cutter mechanism of the bag removal device of the present invention. It is a top view showing an example of the cutter mechanism of the bag removal device of the present invention. It is a side view showing an example of the upper conveyor of the bag removal device of the present invention. FIG. 2 is a side view showing an example of the bag removing device of the present invention, including the frame configuration. FIG. 1 is a front view showing an example of the bag removal device of the present invention, including the frame configuration.

A mode for carrying out the present invention will be described.

In each figure, the x direction is the conveyance direction of the main conveyor 10, the y direction is the width direction or lateral direction of the main conveyor 10 (direction perpendicular to the conveyance direction of the main conveyor 10), and the z direction is the conveyance direction of the bag removal device 1. Indicates that it is in the height direction (vertical direction).

(Basic configuration)
FIG. 1 is a top view showing an example of the basic configuration of the bag removal device of the present invention. FIG. 2 is a side view showing an example of the basic configuration of the bag removal device of the present invention.

The basic configuration of the bag removal device 1 includes a main conveyor 10, an upper conveyor 20, a cutter mechanism 30, and a roller mechanism 50.

The main conveyor 10 includes a conveyor belt 11 and two shafts 12 and 13 provided inside both ends of the conveyor belt 11 in the x direction. The two shafts 12 and 13 are rotatably attached to the frame 15 of the main conveyor 10. By rotating either of the shafts 12, 13, it is possible to move the upper side of the conveyor belt 11 in the x direction. This allows the main conveyor 10 to convey the package 201 placed on the upper part of the conveyor belt 11 in one direction. The main conveyor 10 may include an incline 11a. The slope 11a is a slope that increases in height as it goes forward in the conveyance direction, and extends beyond the upper conveyor 20 forward in the conveyance direction.

Here, the package 201 shows a state in which contents 202 are covered with a bag 203. The contents 202 are foods such as meat, and may be frozen products. Further, the bag 203 may be any bag used for food or the like. For example, nylon or polyethylene film.

The upper conveyor 20 includes a conveyor belt 21 and two shafts 22 and 23 provided inside both ends of the conveyor belt 21 in the x direction. The two shafts 22, 23 are rotatably attached to the frame 25 of the upper conveyor 20. The upper conveyor 20 is provided above the main conveyor 10, and by rotationally driving either of the shafts 22 and 23, it is possible to move the lower side of the conveyor belt 21 forward in the conveyance direction. A gap is set between the upper side of the conveyor belt 11 of the main conveyor 10 and the lower side of the conveyor belt 21 of the upper conveyor 20 so that the package 201 is sandwiched therebetween. Further, the upper conveyor 20 can include a tension mechanism 60, which will be described later. Note that the width of the upper conveyor 20 is set to be narrower than the width of the main conveyor 10 and narrower than the width of the package 201.

The cutter mechanism 30 includes a cutter 31, a shaft 32, and a variable mechanism 40. The cutter 31 includes a rotary blade 31a having a circular circumference. The shaft 32 is provided along the y direction and is fixed at the center of the cutter 31. When the shaft 32 is driven to rotate, the cutter 31 rotates. The rotary blade 31a is installed along the conveyance direction of the package 201. The cutter 31 is provided above the main conveyor 10 on one end side of the upper conveyor 20 in the y direction, slightly shifted from the upper conveyor 20. A gap is provided above the conveyor belt 11 of the main conveyor 10 and below the cutter 31 into which the package 201 can fit. This gap is set so that the cutter 31 can cut at least the upper side of the bag 203 of the package 201. Further, the cutter mechanism 30 can include a variable mechanism 40, which will be described later.

The roller mechanism 50 includes a first roller 51 and a second roller 52. The first roller 51 and the second roller 52 have a cylindrical shape with the same length, and are installed vertically in parallel in the height direction (z direction). Furthermore, the first roller 51 and the second roller 52 can be configured by gears provided around the periphery, and are configured to mesh with each other. As a result, when one of the first roller 51 and the second roller 52 rotates, the other also rotates due to their meshing. The rotation direction is a direction in which the direction between the first roller 51 and the second roller 52 arranged vertically is the direction of arrow B in FIG. Further, the first roller 51 includes a shaft 53 (not shown in FIG. 2), and the second roller 52 includes a shaft 54.

Further, the roller mechanism 50 is provided on the side opposite to the cutter mechanism 30 in the y direction (the other end side in the y direction) with respect to the upper conveyor 20, and is slightly shifted from the upper conveyor 20. Further, the roller mechanism 50 is provided on the other end side of the main conveyor 10 in the y direction. The directions of the rotation center axes of the first roller 51 and the second roller 52 of the roller mechanism 50 are slightly inclined from being parallel to the conveyance direction (x direction) of the conveyor. When viewed from above as shown in FIG. 1, the longitudinal direction of the first roller 51 and the second roller 52 is provided so that the rear side in the conveyance direction is inclined outward in the lateral direction (y direction) by an angle θ with respect to the x direction. This angle can be applied, for example, in a range of 3° or more and 20° or less, further 5° or more and 10° or less.

Further, in the height direction of the first roller 51 and the second roller 52, a position P between them is a position above the main conveyor 10. Preferably, the position P is set near the center of the package 201 in the height direction. In FIG. 2, assuming that the upper conveyor 20 is lifted upward by the package 201, the upper conveyor 20 is set above the lower side of the conveyor belt 21.

(Configuration including motor)
FIG. 3 is a top view showing an example of the bag removing device of the present invention including a motor. FIG. 4 is a front view showing an example of the bag removing device of the present invention including a motor. Note that in FIG. 3, the illustration of the conveyor belts 11 and 21 is simplified. Further, in FIG. 4, illustration of the motor 102 and shaft 22 is omitted, and illustration of the frame is also simplified.

In addition to the basic configuration shown in FIGS. 1 and 2, the bag removal device 1 includes configurations of motors 101, 102, 103, and 104 as drive devices.

The motor 101 is provided on the side surface of the main conveyor 10 opposite to the roller mechanism 50 in the width direction (y direction), and on the extension of the shaft 13 on the front side of the main conveyor 10 in the conveyance direction. When the motor 101 is operated, the shaft 13 rotates (in the direction of the arrow in FIG. 2), and the conveyor belt 11 of the main conveyor 10 can be moved.

The motor 102 is provided on the side surface of the main conveyor 10 opposite to the roller mechanism 50 in the width direction (y direction), and on an extension of the shaft 22 on the rear side of the upper conveyor 20 in the conveying direction. When the motor 102 is operated, the shaft 22 rotates (in the direction of the arrow in FIG. 2), and the conveyor belt 21 of the upper conveyor 20 can be moved.

The motor 103 is provided on an extension of the shaft 32 of the cutter mechanism 30 on the opposite side of the roller mechanism 50 in the width direction (y direction) of the main conveyor 10 . When the motor 103 is operated, the shaft 32 rotates, and the cutter 31 of the cutter mechanism 30 can be rotated. By setting the rotation direction so that the lower side is in the same direction as the forward direction of conveyance of the main conveyor 10, the bag 203 can be cut by the cutter 31 while the package 201 is being conveyed in the forward direction of conveyance. On the other hand, the rotation direction may be reversed, and in this case, the cutting force of the bag 203 by the cutter 31 can be increased while the package 201 receives resistance.

The motors 101, 102, and 103 are installed on the same side of the main conveyor 10 in the width direction (y direction), and are installed in the order of motor 102, motor 103, and motor 101 from the rear to the front in the conveyance direction. ing.

The motor 104 is provided on a side surface opposite to the motors 101, 102, and 103 in the width direction (y direction) of the main conveyor 10, and on an extension of the shaft 53 of the first roller 51 on the rear side in the conveying direction. When the motor 104 is operated, the shaft 53 rotates, the first roller 51 rotates, and the second roller 52 that meshes with the first roller 51 also rotates. Further, the motor 104 is arranged with its upper side slightly inclined towards the main conveyor 10 side, so as not to interfere with nearby workers.

(roller mechanism)
FIG. 5 is a side view showing an example of the roller mechanism of the bag removal device of the present invention. FIG. 6 is a sectional view showing an example of the roller section of the bag removal device of the present invention. FIG. 5 is a longitudinal side view of the roller mechanism 50. FIG. 6 corresponds to the DD cross section of FIG.

The first roller 51 on the upper side and the second roller 52 on the lower side are configured to mesh with each other, but they can be configured with gears that mesh with each other. The first roller 51 and the second roller 52 can have the same diameter (pitch diameter) and the same number of teeth, but in this case, the second roller 52 has a smaller diameter (fewer teeth) than the first roller 51. Gears can be used. For example, the diameter of the second roller 52 is 0.7 times or more and 0.95 times or less, more preferably 0.8 times or more and 0.9 times or less, the diameter of the first roller 51. It has been confirmed through experiments that biting can be improved by making the diameter of the lower second roller 52 smaller than the diameter of the upper first roller 51. This is thought to be because the package 201 is made less likely to come into contact with the second roller 52, making it easier for the bag 203 to get caught between the first roller 51 and the second roller 52.

In FIG. 6, an involute gear is used, and the first roller 51 has 25 teeth, and the second roller 52 has 22 teeth. Since the modules are the same, the diameter is also proportional to this. Further, in FIG. 6, the right side is the main conveyor 10 side.

When the motor 104 is operated, the shaft 53 rotates and the first roller 51 rotates in the direction of the arrow in FIG. Then, the second roller 52 that engages with the first roller 51 rotates in the direction of the arrow in FIG. 6, which is the opposite direction to the first roller 51. Then, a force is generated between the first roller 51 and the second roller 52 in the direction of the arrow shown by B in FIG. Therefore, the bag 203 that has reached the roller mechanism 50 passes while being caught between the first roller 51 and the second roller 52, and is conveyed in the direction of the large arrow B shown in FIG.

(Variable mechanism of cutter mechanism)
FIG. 7 is a side view showing an example of the cutter mechanism of the bag removal device of the present invention. FIG. 8 is a top view showing an example of the cutter mechanism of the bag removal device of the present invention.

The cutter mechanism 30 includes a variable mechanism 40, and the variable mechanism 40 includes a fixed shaft 41, a boss 42, an adjustment plate 43, a frame 44, a mounting plate 45, and a stopper 46.

The frame 44 is provided on the side surface of the motor 103 on the cutter 31 side, and is configured to protrude from the motor 103 on both sides in the x direction.

The adjustment plate 43 is attached to the frame 44 and protrudes toward one end in the x direction (in the examples of FIGS. 7 and 8, the rear side in the conveyance direction). The mounting position (particularly the position in the x direction) may be adjusted by using a screw and a groove extending in the x direction. A boss 42 is fixed to the end of the adjustment plate 43 that protrudes from the frame 44.

The boss 42 is a member that can be rotatably attached to the fixed shaft 41 extending in the y direction. For example, it can be rotated via a bearing or the like. The center of the boss 42 is a rotation center E, which is shifted from the center of the cutter 31 in the x direction.

The fixed shaft 41 has one end forming a threaded portion 41a, and is fixed to a foundation frame 80, which will be described later. Moreover, the shaft portion 41b in the middle is rotatably attached to the boss 42. In the examples shown in FIGS. 7 and 8, the fixed shaft 41 is located on the rear side in the conveyance direction (x direction) with respect to the center of the cutter 31.

The attachment plate 45 is attached to the frame 44 and is configured to protrude toward the other end side in the x direction (in the examples of FIGS. 7 and 8, the front side in the conveyance direction). A stopper 46 is fixed to the end of the mounting plate 45 that protrudes from the frame 44. The mounting plate 45 includes a fixed adjustment member 45a such as a nut, so that the position of the stopper 46 in the z direction can be adjusted.

The stopper 46 is a member that functions as a stopper when its lower end comes into contact with a receiving portion 91 fixed to the base frame 80 side, and is fixed to the mounting plate 45 . Specifically, it can be constructed in the shape of a bolt having a female threaded portion, and the female threaded portion is screwed into the fixing adjustment member 45a to be adjustable in the z direction. In this case, the lower end becomes the head of the bolt.

With the above configuration, the rotation center E is located in one direction in the x direction, and the stopper 46 is located in the other direction in the x direction, rather than the motor 103 or the cutter 31. The entire cutter mechanism 30 rotates about a rotation center E, and the cutter 31 is configured to be able to move up and down. When no work is performed, the stopper 46 is in contact with the receiving portion 91 due to the weight of the motor 103, cutter 31, etc. On the other hand, when the cutter 31 passes the package 201 toward the lower end side, it becomes possible to lift the package 201 against the weight of the motor 103, the cutter 31, etc., depending on the resistance during cutting. At this time, the stopper 46 moves upward away from the receiving portion 91.

(Tension mechanism of upper conveyor)
FIG. 9 is a side view showing an example of the upper conveyor of the bag removal device of the present invention. Here, the tension mechanism 60 provided in the upper conveyor 20 will be explained. Note that the tension mechanism 60 is not shown in FIGS. 1 to 4.

The tension mechanism 60 includes a roller 61, a support frame 62, a spring 63, an adjustment section 64, and a mounting section 65.

The roller 61 has a cylindrical shape, and the cylinder is rotatably attached to the support frame 62. The central axis at this time is the y direction. The outer periphery of the roller 61 contacts the inside of the conveyor belt 21 on the lower side of the upper conveyor 20. When the conveyor belt 21 moves, the outer periphery of the roller 61 comes into contact with the roller 61, so that it rotates in accordance with the movement of the conveyor belt 21.

The support frame 62 is configured to be rotatable about the rotation center G with respect to the frame 25 of the upper conveyor 20. The support frame 62 as a whole has a shape that is bent in the middle, and the center of rotation G exists at the bent part. The support frame 62 has one end of a spring 63 attached to an end above the rotation center G, and a roller 61 attached to an end ahead of the rotation center G in the conveying direction.

The spring 63 is in the form of a tension spring, and one end is attached to the support frame 62 and the other end is attached to one end of the adjustment part 64. The spring 63 is provided along the x direction, and the longer the spring is, the more the elastic force acts in the direction of contraction.

The adjustment part 64 has the spring 63 attached to one end and is fixed to the attachment part 65 at the other end. The adjustment section 64 has a male screw section and is fixed using a nut or the like. Thereby, the position in the x direction relative to the mounting portion 65 can be adjusted, and the elastic force of the spring 63 can be changed.

The attachment part 65 is fixed to the frame 25 of the upper conveyor 20. By fixing the adjusting portion 64 at a position higher than the conveyor belt 21, the elastic force of the spring 63 can be easily adjusted. Note that the frame 25 of the upper conveyor 20 is fixed to a foundation frame 80, which will be described later.

As shown in FIG. 9, two tension mechanisms 60 are provided along the x direction. As a result, the lower side of the conveyor belt 21 is urged inward or downward at two locations. Note that the number of tension mechanisms 60 may be one or three or more. By providing a plurality of them, reliable biasing can be performed over a predetermined distance.

With the above configuration, when the package 201 passes under the upper conveyor 20, an upward force is applied due to the thickness of the package 201. At this time, since the roller 61 rises, the support frame 62 rotates around the rotation center G (clockwise in FIG. 9). Then, since the upper end of the support frame 62 moves in the direction of stretching the spring 63, a force acts in the direction of contracting the spring 63. Then, force is transmitted to the support frame 62 in the opposite direction of rotation (counterclockwise in FIG. 9) to return it to its original position. This applies force in the direction in which the roller 61 presses the package 201, making it difficult for the package 201 to shift.

(Frame configuration)
FIG. 10 is a side view showing an example of the bag removal device of the present invention, including the frame configuration. FIG. 11 is a front view showing an example of the bag removal device of the present invention, including the frame structure.

The basic frame 80 of the bag removing device 1 is a frame on the side of the bag removing device 1 that allows the height of the main conveyor 10 to be set to a height that is easy to work with. The base frame 80 can be made of a pipe member 80a or the like, and can be configured to have casters 85 provided below for easy movement. The base frame 80 is fixed to the frame 15 of the main conveyor 10, the frame 25 of the upper conveyor 20, the fixed shaft 41 of the variable mechanism 40, and the frames 55 and 56 of the roller mechanism 50. Note that in FIG. 11, illustration of fixing the upper conveyor 20 to the frame 25 is omitted. Each motor 101, 102, 103, 104 is also fixed to the base frame 80 side.

(effect)
Next, the operation of the bag removal device 1 will be explained. First, as shown in FIGS. 1 and 3, the package 201 is placed on the main conveyor 10 on the front side of the upper conveyor 20 in the conveying direction. When the motor 101 is operated from this state, the conveyor belt 11 on the upper side of the main conveyor 10 moves in the direction of arrow A1, and the package 201 also moves in the direction of arrow A1 accordingly. Initially, it is set so that the package 201 can easily enter the lower side of the upper conveyor 20 by moving along the slope 11a shown in FIG.

Next, when the package 201 reaches the upper conveyor 20, the package 201 is conveyed while being vertically sandwiched between the upper conveyor belt 11 of the main conveyor 10 and the lower conveyor belt 21 of the upper conveyor 20. . At this time, the conveyor belt 21 of the upper conveyor 20 can be moved by operating the motor 102. Here, the upper conveyor belt 11 of the main conveyor 10 and the lower conveyor belt 21 of the upper conveyor 20 are set so that the conveyance direction and conveyance speed are the same. Since the upper conveyor 20 is equipped with the tension mechanism 60 described in FIG. 9, it is possible to convey the package 201 while holding it down and making it difficult to shift.

The package 201 then reaches the cutter mechanism 30. The cutter mechanism 30 can rotate the cutter 31 by operating the motor 103. The rotating cutter 31 of the cutter mechanism 30 cuts the vicinity of one end of the package 201 in the width direction (y direction) from above along the conveyance direction (x direction). As a result, at least the upper side of the bag 203 of the package 201 is completely cut along the conveyance direction near the end of the package 201 on one end side in the width direction (y direction). At this time, by providing the variable mechanism 40, it becomes possible to cut the package 201 along the upper side of the bag 203, thereby preventing the contents 202 from being cut more than necessary, and increasing the cutting resistance more than necessary. prevent

Next, the package 201 reaches the roller mechanism 50. By operating the motor 104, the roller mechanism 50 can rotate one roller, the first roller 51, and simultaneously rotate the second roller 52 that meshes with it. The first roller 51 and the second roller 52 bite into the bag 203 at the other end (opposite the cutter mechanism 30) of the package 201 in the width direction (y direction). At this time, due to the inclination angle θ (FIGS. 1 and 3) of the first roller 51 and the second roller 52, even if the width of the package 201 is different, the other end of the bag 203 in the width direction can be easily bitten. It becomes possible to do so.

The roller mechanism 50 separates the bag 203 of the packaging body 201 which has been cut near one end thereof, with the contents 202 placed on the main conveyor 10. At this time, the bag 203 passes between the first roller 51 and the second roller 52 and is discharged to the outside of the main conveyor 10 in the lateral direction (width direction) (in the direction of arrow B in FIGS. 1 and 3). Since the bag 203 passes between the rollers that engage with each other, reliable discharge is possible. On the other hand, the contents 202 are conveyed as they are between the main conveyor 10 and the upper conveyor 20 in the conveyance direction. After passing through the roller mechanism 50, the upper conveyor 20 disappears, and the contents 202 are transported forward in the transport direction (in the direction of arrow A2 in FIGS. 1 and 3) only by the main conveyor 10.

In this way, it becomes possible to remove the bag 203 from the package 201 and perform a bag removal operation in which only the contents 202 can be taken out.

(effect)
According to the embodiment described above, the bag 203 can be reliably removed from the package 201. In particular, the roller mechanism 50 in which two rollers engage with each other makes it possible to avoid the risk that even if the bag 203 or the like has oil on it, it will not be able to be discharged due to slipping. In addition, by reducing the diameter of the lower roller, it is possible to improve the biting. Further, by providing the roller mechanism 50 on the side surface, the contents 202 remain on the main conveyor 10, so it is possible to prevent the contents 202 from being damaged more than necessary, and furthermore, subsequent operations can be performed easily. At this time, by arranging the rollers diagonally, it becomes easier to bite the bag 203 according to the size of the package 201. Furthermore, the tension mechanism 60 of the upper conveyor 20 allows reliable bag removal work without shifting the package 201. Furthermore, the variable mechanism 40 of the cutter mechanism 30 allows the bag 203 of the package 201 to be cut accurately.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and includes various modifications other than those described above. For example, the present invention is not limited to having all the configurations provided in the embodiments described above. It is also possible to delete a part of the configuration of a certain embodiment or replace it with another configuration.

For example, although food is shown as the content 202, the present invention can be applied to content other than food.

Further, as long as the package 201 and the contents 202 are difficult to shift with respect to the main conveyor 10, the present invention can be applied without the upper conveyor 20.

1 Bag removal device 10 Main conveyor 11 Conveyor belt 15 Frame 20 Upper conveyor 21 Conveyor belt 25 Frame 30 Cutter mechanism 31 Cutter 40 Variable mechanism 41 Fixed shaft 42 Boss 46 Stopper 50 Roller mechanism 51 First roller 52 Second roller 60 Tension mechanism 61 Roller 62 Support frame 63 Spring 80 Base frame 101, 102, 103, 104 Motor 201 Packaging body 202 Contents 203 Bag

Claims (7)

A bag removal device that removes a bag from a package whose contents are packaged in a bag,
a main conveyor that conveys the package; a cutter mechanism that includes a cutter that cuts at least a part of the bag of the package during conveyance on the main conveyor; Equipped with a roller mechanism that separates and discharges from the body,
The roller mechanism includes a first roller provided with a gear around the periphery, and a second roller provided with a gear around the periphery and meshes with the first roller, and the bag rotates between the first roller and the second roller. A bag removal device characterized by passing between rollers and being discharged. The bag removal device according to claim 1,
The bag removal device is characterized in that the first roller and the second roller are provided vertically in parallel, with the first roller on the upper side and the second roller on the lower side. The bag removal device according to claim 2,
The bag removal device is characterized in that the rotation center axes of the first roller and the second roller are provided so that the rear side in the conveyance direction is inclined laterally outward with respect to the conveyance direction of the main conveyor. The bag removal device according to claim 2,
A bag removal device characterized in that the diameter of the gear of the second roller is smaller than the diameter of the gear of the first roller. The bag removal device according to claim 1,
The cutter mechanism includes a variable mechanism that can change the height of the cutter by rotating about a fulcrum with respect to the frame side of the bag removal device, and when the package passes under the cutter, The bag removal device is characterized in that the cutter is movable upward according to the thickness of the package. The bag removal device according to claim 1,
An upper conveyor is provided above the main conveyor, and when the package passes through the cutter mechanism and the roller mechanism, the package is conveyed while being sandwiched between the upper side of the main conveyor and the lower side of the upper conveyor. A bag removal device characterized by: The bag removing device according to claim 6,
The upper conveyor includes a tension mechanism,
The bag removal device is characterized in that the tension mechanism includes a roller that urges the conveyor belt of the upper conveyor downward from the inside using the elastic force of a spring.

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