JP2547959B2 - Bag opening machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag opening machine, and in particular,
The present invention relates to a bag opening machine that cuts open a bag filled with powdery raw materials and discharges the contents from the bag.

[0002]

2. Description of the Related Art Generally, in a bag opening machine that opens a bag and takes out the contents, when the bag is cut open, the cut edge is sharp and there are no chips, and the bag is packed. It is important to satisfy the requirements that all contents can be discharged and that cleaning is easy.

However, it is difficult to satisfy all of these various conditions, and the structure is complicated even if it is attempted to realize it.

The present invention solves the above problems,
An object of the present invention is to provide a bag opening machine that makes it possible to sharpen the cut edge of a bag and prevent the generation of chips and to discharge the entire amount of the contents with a simple configuration. Another object of the present invention is to make the cut edge of the bag sharp by a simple structure to prevent the generation of chips, allow the total amount of the contents to be discharged, and tear the bag when opening the bag. An object of the present invention is to provide a bag opening machine capable of reliably preventing tears and the like. Still another object of the present invention is that, with a simple structure, the cut end of the bag is sharpened to prevent generation of chips, and the entire content can be discharged, and dust generated during bag opening. It is an object of the present invention to provide a bag opening machine capable of preventing leakage of the like.

[0005]

In order to achieve the above object, the present invention provides, as a first invention, a main body frame having a discharge chamber having a downward discharge port, a bag carrying-in port, and a bag discharging port. A cutter that cuts across the upper and lower surfaces of the bag, and a side cutter member that cuts the side surface of the bag in the thickness direction, a cutting device that cuts the bag, and the cutting device above the discharge port. It is provided in the state of adjoining with sandwiching,
A transfer device having a pair of transfer members each of which can switch between a horizontal state and a standing state, and provided in the discharge chamber,
An air blower having a pair of blow-up parts is provided, the contents are sealed, and the bag carried in from the carry-in port is stopped between the pair of carrying members by the carrying device, and then the cutting is performed. The bag is divided by the device, and each half of the divided bag is dropped by switching the conveying member to the standing state and hooked on the blow-up part of the air blow device, and after the contents are dropped and discharged. The means for discharging the empty bag from the bag discharge port of the main body frame is adopted.

As a second invention including the first invention, the cutting device is provided with a cutter, a traveling member for traveling the cutter so as to traverse the bag, and a member facing the traveling member. It has a side cutter member that rises by a push-up member and cuts the side surface of the bag, and a pusher that pushes up the bag in conjunction with the side cutter member, and presses the bag against the running member by the pusher, In this state, after the side cutter member cuts both side surfaces of the bag, the cutter cuts the upper and lower surfaces of the bag.

As a third aspect of the invention, the bag is attached to a main body frame which has a discharge chamber having a downward discharge port, a bag carry-in port, and a bag discharge port, and the inside of which is substantially sealed. A dividing device for dividing and a conveying device provided in a state of being adjacent to each other with the dividing device interposed above the discharge port, each having a pair of conveying members capable of switching between a horizontal state and a standing state; An air blower provided in the discharge chamber and having a pair of blow-up parts, and a suction blower for making the inside of the main body frame a negative pressure are provided, the contents are enclosed, and the bag is carried in from the carry-in port. To
After being stopped between the pair of transport members in the transport device, each half of the divided bag is divided by the dividing device,
After the transport member is switched to the upright state, the transport member is dropped and hooked at the upper part of the blower of the air blower, and after the contents are dropped and discharged, the empty bag is discharged from the bag discharge port of the main body frame. The method of discharging is adopted.

As a fourth invention including the third invention, the cutting device is provided with a cutter, a traveling member for traveling the cutter so as to traverse the bag, and facing the traveling member. The pusher pushes the bag up by a pushing member, and the pusher pushes the bag against the traveling member, and the cutter cuts the bag in this state.

As a fifth aspect of the present invention, the main body frame has a discharge chamber having a downward discharge port, a bag carry-in port, and a bag discharge port, and the inside of the main body frame is substantially sealed. A cutter that cuts across the upper and lower surfaces,
It has a side cutter member that cuts the side surface of the bag in the thickness direction, and is provided in a state of being adjacent to a cutting device that divides the bag and sandwiching the cutting device above the discharge port, and each is in a horizontal state. And an upright state, a conveying device having a pair of conveying members, an air blow device provided in the discharge chamber and having a pair of blow-up parts, and a suction blow device for making the inside of the body frame a negative pressure. Is provided, the contents are enclosed, and the bag carried in from the carry-in port is
After being stopped between the pair of transport members in the transport device, each half of the divided bag is divided by the dividing device,
After the transport member is switched to the upright state, the transport member is dropped and hooked at the upper part of the blower of the air blower, and after the contents are dropped and discharged, the empty bag is discharged from the bag discharge port of the main body frame. The method of discharging is adopted.

As a sixth invention including the fifth invention, the cutting device is provided with a cutter, a traveling member for traveling the cutter so as to traverse the bag, and a member facing the traveling member. It has a side cutter member that rises by a push-up member and cuts the side surface of the bag, and a pusher that pushes up the bag in conjunction with the side cutter member, and presses the bag against the running member by the pusher, In this state, after the side cutter member cuts both side surfaces of the bag, the cutter cuts the upper and lower surfaces of the bag.

[0011]

According to the present invention, the above means are adopted.
Since the cutting device for cutting the bag has a side cutter member for cutting the side surface of the bag at the beginning of the cutting process,
By cutting the side surface of the bag with this side cutter member and then cutting the upper and lower surfaces of the bag, the bag is not torn or torn. Therefore, the fragments of the bag are prevented from being generated at the time of division. Also, since the side cutter member cuts the side surface of the bag in the thickness direction,
Even a thick bag can be easily divided.

Further, in the case where the bag is equipped with the suction blow device, the inside of the main body frame can be made to have a negative pressure while the bag opening machine is carrying out the bag opening operation, so that the contents of the bag can be opened during bag opening. It is designed to prevent dust and the like generated from leaking to the outside.

[0013]

Embodiments of the present invention shown in the drawings will be described below. 1 is a schematic view showing an embodiment of a bag opening machine according to the present invention, FIG. 2 is a front view showing the whole bag opening machine, and FIG. 3 is a plan view in FIG. That is, the bag opening machine shown in FIGS. 1, 2 and 3 has a discharge chamber 9 and an upward bag discharge port 1.
A main body frame 1 having a dividing device 2 and conveying members 23 and 24 capable of switching between a horizontal state and a standing state.
And the air blower 4 having the blowing parts 71, 71.

1 to 3, the main body frame 1
Is a base 7 supported in a horizontal state by four legs 8, ..., And a cover 11 attached so as to cover the upper part thereof.
It is formed by and. The base 7 has a discharge chamber 9 opening upward therein, and the discharge chamber 9 communicates with the outside through a downward discharge port 10 provided at the central bottom of the base 7. are doing. The discharge port 10 is provided with an opening / closing member that opens and closes the discharge port 10.

The cover 11 is attached to the central upper part of the front and rear surfaces of the base 7 and extends upward, respectively, and a pair of side cover parts 15 and 15, and the side cover parts 15 and 15.
The left and right open / close cover parts 14 and 14 that are rotatably connected to each other by hinges 82 and 82 between the ceiling cover part 15a that is installed between the upper ends of the ceiling cover part 15a and the ceiling cover part 15a.
It is formed by and. The cover 11 is formed by the side cover portions 15 and 15, the ceiling cover portion 15a, and the opening / closing cover portions 14 and 14 into a shape that is opened downward as a whole. The cover 11 is arranged so as to cover the upper opening of the discharge chamber 9 of the base 7, thereby sealing the discharge chamber 9.

The cover 11 includes one opening / closing cover portion 14
A bag carry-in port 13 that is formed on the right side and opens to the right and a bag discharge port 12 that opens upward are formed. The suction blow device 5 having a dust collecting member (not shown) is connected to the bag discharge port 12 via a bag discharge duct 78. A storage chamber 79 for storing the empty bag A is provided in the middle of the bag discharge duct 78, and the suction blow device 5 is connected to a nozzle 80 formed in the storage chamber 79.

A shutter 20 having a driving member 18, a connecting member 19b and a lid member 19a is provided at the carry-in port 13.
Is provided. The drive member 18 is one of the open / close cover parts 1
4, a pressure cylinder 16 and a rod 17 that is inserted into and retracted from the pressure cylinder 16. Connecting member 19b
Is a rotary shaft 21 pivotally supported by one opening / closing cover portion 14.
And the lever 2 attached to one end of the rotating shaft 21.
1a, and the rod 1 is attached to the lever 21a.
The tips of 7 are connected. The rotating shaft 21 is connected to the lid member 19a formed to have a size capable of closing the carry-in port 13 via the mounting portion 22. This allows the pressure cylinder 1
6 is driven, the rod 17 is retracted and retracted so that the rotating shaft 21
Are interlocked with each other, and the lid member 19a pivots about the pivot shaft 21 to open and close the carry-in port 13.

A transfer device 3 provided on the main body frame 1.
As shown in FIGS. 4 to 6, 7 and 8, is a first conveyor 23 and a second conveyor 24 configured as a pair of conveying members, and a pair of driving members 2 operating at the same time.
It is formed by 9 and 30. At this time, the first conveyor 23
The second conveyor 24 is arranged on the base 7 in a state of being positioned at the upper opening of the discharge chamber 9.

The first conveyor 23 is a so-called belt conveyor, and a driving-side roller 33 and a driven-side roller 35 are pivotally supported left and right between a pair of side plates 31 facing each other in the front-rear direction. The drive side roller 33 has a plurality of pulleys 33a.
However, in the driven roller 35, a plurality of pulleys 35a are concentrically arranged side by side in the front-rear direction at a portion corresponding to the pulley 33a, and an endless belt 39 is provided between the pulleys 33a, 35a. It's suspended. The driving-side roller 33 is connected to a rotation shaft of a motor 37 attached to the side plate 31 by a chain, and the driving of the motor 37 causes the rollers 33, 35 and the belt 39 to interlock and rotate in a predetermined direction. It is like this.

The side plates 31, 31 of the first conveyor 23
Are pivotally supported by a pair of pivotally supporting members 41, 41 attached to the front and rear positions of the side cover portions 15, 15, and the first conveyor 23 rotates about the axes of the pivotally supporting members 41, 41. It is free. At this time, one pivot support member 41 located on the front side has one end connected to the front side plate 31 and the other end penetrating the front side cover portion 15 and extending to the outside. It has a support shaft 43. Then, at the outer end of the support shaft 43,
An arm 45 extending in a direction orthogonal to the axis is connected. Therefore, as the arm 45 rotates, the support shaft 4
3 can be interlocked, and along with this, the first conveyor 23
Can rotate integrally with the support shaft 43.

The arm 45 is interlocked with the driving member 29 mounted on the base 7. The drive member 29 is a so-called actuator formed of a pressure cylinder 25 and a rod 27 that is inserted into and retracted from the pressure cylinder 25 so that the rod 27 can move in and out according to the pressure applied to the pressure cylinder 25. It has become. The tip of the rod 27 is rotatably connected to the tip of the arm 45. Therefore, the first conveyor 23 can be rotated according to the driving of the driving member 29.

The second conveyor 24 is also the first conveyor 23.
It is formed similarly to The second conveyor 24 is a so-called belt conveyor, and has a pair of side plates 32, 32 facing each other in the front-rear direction.
A roller 34 on the driving side and a roller 36 on the driven side are pivotally supported between the left and the right. The drive-side roller 34 has a plurality of pulleys 34a, and the driven-side roller 36 has a plurality of pulleys 36a which are concentrically arranged in a front-rear direction in a portion corresponding to the pulley 34a. 34a,
An endless belt 40 is suspended between 36a. The driving-side roller 34 is a motor 38 attached to the side plate 32.
This motor 38 is connected to the rotary shaft of
Driven by, the rollers 34, 36 and the belt 40 are interlocked and rotate in a predetermined direction.

The side plates 32, 32 of the second conveyor 24
Is pivotally supported by a pair of pivotally supporting members 42, 42 attached to the front and rear positions of the side cover portions 15, 15, and the second conveyor 24 rotates about the axes of the pivotally supporting members 42, 42. It is free. At this time, one pivot support member 42 located on the front side has one end connected to the front side plate 32 and the other end penetrating the front side cover part 15 and extending to the outside. It has a support shaft 44. Then, at the outer end of the support shaft 44,
Arms 46 extending in a direction orthogonal to the axis are connected. Therefore, as the arm 46 rotates, the support shaft 4
4 can be interlocked, and along with this, the second conveyor 24
Can rotate integrally with the support shaft 44.

The arm 46 is interlocked with the drive member 30 attached to the base 7. The driving member 30 is a so-called actuator formed of the pressure cylinder 26 and a rod 28 that is inserted into and retracted from the pressure cylinder 26, and the rod 28 moves in and out according to the pressure applied to the pressure cylinder 26. It has become. The tip of the rod 28 is rotatably connected to the tip of the arm 46. Therefore, the second conveyor 24 can be rotated according to the driving of the driving member 30.

The first conveyor 23 and the second conveyor 24 are flush with each other with the upper surfaces of the belts 39, 39, ... And the upper surfaces of the belts 40, 40 ,. Are initially set so that they are adjacent to each other in a series state so as to be adjacent to each other in the state of being separated from each other at a predetermined interval. At this time, the first conveyor 23 and the second conveyor 24 are arranged so that the moving directions of the transport surfaces F thereof coincide with each other. Accordingly, when the bag A is placed on the transport surface F and each of the conveyors 23 and 24 is driven, the bag A is transferred to the first conveyor 2
It moves from the 3rd side to the 2nd conveyor 24 side. In this case, the first conveyor 23 and the second conveyor 24
It is desirable that the separated portion between and is located above the discharge port 10 formed in the base 7.

The driving members 29 and 30 are provided with arms 45 and 46.
So that the rotation angle of
Stroke is set. As a result, when the drive members 29 and 30 are driven in conjunction with each other at the same time, the first conveyor 23 and the second conveyor 24 have their respective pivotal support members 41 and 4 moved.
It will rotate about 2. Therefore, by operating the driving members 29 and 30, the conveyors 23 and 2 can be operated.
4 is capable of performing a switching operation between the horizontal state and the standing state.

The main frame 1 is provided with a cutting device 2 at a portion corresponding to a space between the first conveyor 23 and the second conveyor 24. The cutting device 2 includes a cutter 47.
It is formed by the traveling member 48, the pushing-up member 57, the pusher 51, and the side cutter member 52. The traveling member 48 forming a part of the dividing device 2 is a reciprocating type long actuator, and a rodless cylinder is used here. The traveling member 48 is formed of a cylinder, a piston that is reciprocally arranged inside the cylinder, and an actuating body 48a that is connected to the piston and is movable in the axial direction along the outer surface of the cylinder. To be done. Then, in accordance with the pressure applied to the cylinder of the traveling member 48, the operating body 4
8a is operated, and the cutter 47 is attached to the operating body 48a. The cutter 47 is the operating member 4
By the operation of 8a, it can reciprocate integrally with this in the axial direction of the cylinder, and the upper surface or the lower surface of the bag A can be cut along the traveling direction. At this time, the traveling range of the cutter 47 is set to be larger than the width of the bag A.

The traveling member 48 is supported by a support body 50 which is horizontally installed between the pair of side cover portions 15. As a result, the traveling member 48 is arranged such that its axis is orthogonal to the conveying direction of the conveyors 23, 24. At this time, the support body 50 is moved to
To the height of the bag A which exceeds the thickness of the bag A. Therefore, the cutter 47 attached to the operating body 48a of the traveling member 48 travels above the transport surface F so as to cross the transport direction. The support body 50 has a plurality of mounting holes 7 formed in the side cover portions 15 and 15 in the vertical direction.
Since it is attached by a bolt or the like via 4a, by selecting an arbitrary attachment hole 74a,
It is possible to easily adjust the height at which the is arranged.

The support 50 in this case is shown in FIG.
As shown in (b) and (c), a long frame body that is capable of supporting the traveling member 48 and has a size capable of accommodating the actuating body 48a in a reciprocally movable state and that opens vertically Is doing. On the bottom of the support body 50, a pair of cover portions 60, 60 are formed in a portion corresponding to the traveling range of the cutter 47 so as to cover the operating body 48a. At this time, a slit-shaped gap 61 is formed between the cover portions 60, 60 so that the lower end portion of the cutter 47 can reciprocate in a state of protruding downward.

The pusher 51 is shown in FIGS. 11 (a) and 11 (b).
As shown in (c), it comprises a pair of plate portions 62, 62 facing each other in parallel with a spacer 64 at a predetermined interval, and attachment portions 63, 63 integrally attached to both side end portions thereof.
In this case, the distance between the plate portions 62, 62 is
It is set so that it can travel with the lower end of the cutter 47 intervening between 62 and can accommodate a side cutter member 52 described later.

The side cutter member 52 is shown in FIG.
As shown in (b), a holding body 53 having a U-shaped plate that opens upward, and a pair of side cutters 54 held by the holding body 53,
And 54. The holding body 53 has holding portions 67, 67 provided at both open end portions thereof, and mounting portions 66, 66 integrally attached to both side end portions of the holding body 53. The side cutters 54, 54 are positioned so that the blades thereof face upward, and the blades intersect perpendicularly to both side surfaces of the bag A.
4, 54 are held by the holding portions 67, 67.

The side cutter member 52 is a pusher 51.
The side cutters 54, 54 are arranged between the two plate portions 62, 62 so that the side cutters 54, 54 can be retracted from the upper end portion of the pusher 51. Both side surfaces of the bag A are cut when the side cutters 54, 54 project. The distance in the height direction from the side cutters 54, 54 to the lower end of the holding body 53 is set to be larger than the thickness of the bag A.

Then, the mounting portion 6 of the side cutter member 52
6 and 66 are push-up members 57 fixed to the outer wall of the base 7.
The rods 56, 56 are respectively connected to the tip end portions thereof. The push-up member 57 is a so-called actuator mechanism including a pair of pressure cylinders 55 and 55 and rods 56 and 56 that are inserted into and retracted from the pressure cylinders 55 and 55. And the rod 56,
The reference numeral 56 interlocks in accordance with the pressure applied to the pressure cylinders 55, 55, and performs a retracting operation in the vertical direction. Therefore, the side cutter member 52 includes the rod 56,
It is possible to move up and down integrally with 56.
It should be noted that the side cover portions 15, 15 are provided at the central portions thereof with the attachment portions 63, 63 of the pusher 51 and the side cutter member 52.
In order to form a passage for the mounting portions 66, 66, passages 74, 74 are formed vertically with a predetermined gap. The presence of the passages 74, 74 does not hinder the operation of the pusher 51 and the side cutter member 52.

Pusher 51 and side cutter member 52
In the normal state, is disposed in the discharge chamber 9 of the base 7 and is provided with each upper end portion corresponding to the traveling line of the cutter 47. When the pusher 51 and the side cutter member 52 are in the normal state as described above,
It is arranged so as not to project above the transport surface F formed by 24, so as not to obstruct the movement of the bag A moving on the transport surface F. Then, the side cutter member 52 is
Locking portions 49, 4 provided downward at both ends of the support body 50
By locking at 9, the upper limit is set.

Here, in order to perform the protruding operation of the side cutter member 52 at a predetermined speed, as shown in the drawing, the oil damper 5 is provided between the mounting portions 66, 66 and the base 7.
It is desirable to provide 9 or the like. Reference numeral 65 is a mounting portion 6 of the pusher 51 for inserting the rods 56, 56.
It is an insertion hole formed in 3, 63.

Mounting portions 66, 66 of the side cutter member 52
A spring 58, which is an urging member, is attached between the spring attaching portion 68 and the attaching portion 63 of the pusher 51 via the spring attaching portions 68 and 69. This spring 58 is a so-called tension coil spring, and a plurality of springs are used as needed, and have an elastic force that does not displace unless a force greater than the weight of the bag A enclosing the contents acts. . And
The elastic force of the spring 58 causes the pusher 51 to move upward together with the side cutter member 52, and at this time, the pusher 51 pushes up the bag A and presses it against the support 50. In addition, 70 is a spacer.

Further, an air tank 72 for supplying air
And a pair of blow-up portions 71, 71 having a plurality of air outlets 73, 73 ,. Fukiage 71,
71 is formed of a pipe member that circulates the air from the air tank 72, and is arranged in the discharge chamber 9. Also,
The blow-up portions 71, 71 have a rectangular shape with a part thereof opening downward, and each of the blow-up portions 71, 71 is covered with each half of the divided bag A so as to be hooked. I am doing it. At this time, the outlets 73, 73, ...
The upper portions 71, 71 of the bag A on which the respective half portions are covered are opened upward.

In the discharge chamber 9 of the base 7, the first conveyor 2
3 and a pair of guide plates 76 below the second conveyor 24,
76 are arranged vertically. This guide plate 76, 76
When the conveyors 23 and 24 are switched to the standing state after the bag A is divided, each half of the bag A is blown by the air blower 4
This is to smoothly guide the air toward the blow-up parts 71, 71. Further, as shown in FIG. 13, the first conveyor 2
Bag holding members 77, 77 extending downward are connected to the third conveyor 24 and the second conveyor 24.
The bag holding members 77, 77 are adapted to rotate integrally with the conveyors 23, 24 in accordance with the switching operation of 3, 24. At this time, as shown in FIG. 14, the guide plates 76, 76
The notches 76a, 76a formed in the above do not prevent the bag holder 77 from rotating.

Reference numeral 6 denotes a bag A carry-in device. The carry-in device 6 is a so-called belt conveyor, and is installed so as to be adjacent to the main body frame 1 with its upper surface aligned with the carrying surface F of the carrying device 3. Then, by driving the carry-in device 6, the bag A disposed on the upper surface thereof is guided from the carry-in port 13 into the inside of the cover 11. Incidentally, 75 is a side cover, and 81 is a partition plate.

Next, the operation of the above will be described. This bag opening machine is configured as described above, so that the carrying process by the carry-in device 6 and the carrying device 3, the cutting process by the cutting device 2, the discharging process for discharging the contents of the bag A, and the empty bag A are discharged. Each process of the bag discharging process is automatically performed. The bag A, for example, in which the powdery or granular material or the like is to be opened is cut open and the contents are discharged as a result of the above steps, and then the empty bag A is discharged to the outside of the system. Has become.

The bag opening process by this bag opening machine is shown in FIGS. 15 to 24. FIGS. 15 and 16 show the bag A carrying process, FIGS. 17 and 18 show the bag A dividing process, and FIG.
22 to 24 show the process of discharging the contents of the bag A, and FIGS. 23 and 24 show the process of discharging the empty bag A.

In the normal state, the first conveyor 23 and the second conveyor 24 of the transfer device 3 are horizontal.
Further, the carry-in port 13 is closed by the shutter 20, and the discharge port 1
Reference numeral 0 denotes an opening / closing member, and the inside of the main body frame 1 is substantially sealed. Then, after placing the bag A containing the contents on the upper surface of the carry-in device 6,
When an automatic operation button (not shown) is pressed, the operation is sequentially started from the carrying process.

First, in the carrying step, when the automatic operation button is operated, the driving member 18 of the shutter 20 is driven and the lid member 19a opens the carry-in port 13 of the cover 11, as shown in FIG. The carry-in device 6 and the transport device 3 are driven. At this time, each conveyor 2 of the transfer device 3
In the belts 3 and 24, the respective belts 39 and 40 rotate in the same direction, so that the bag A guided from the carry-in port 13 onto the transport surface F is guided to the inside of the main body frame 1. ing.

Then, as shown in FIG. 16, the cutting device 2
When the central portion of the bag A comes between the first conveyor 23 and the second conveyor 24 where is located, the carry-in device 6 and the conveyors 23 and 24 are stopped, and the shutter 20 is driven to cover the carry-in port 13. It is closed by the member 19a.

After the carrying process, the process goes to the dividing process. At this time, the suction blow device 5 is activated when the automatic operation button is operated, and is driven until the whole is stopped. As a result, the inside of the main body frame 1 is in a negative pressure state because air is discharged through the bag discharge duct 78.
Next, as shown in FIG. 17, the push-up members 57, 57 of the cutting device 2 are driven, and the pusher 51 moves upward together with the side cutter member 52. At this time, the pusher 51
Even if the weight of the bag A acts, the elastic force of the springs 58, 58 prevents the side cutters 54, 54 from lowering down. Therefore, the pusher 51 pushes the bag A up and the central portion of the bag A. Is pressed against the support 50.

An outline of the dividing step is shown in FIGS. FIG. 25 is a view showing a state where the pusher 51 presses the bag A against the support 50. In this state, since the contents of the bag A are interposed between the pusher 51 and the support body 50, the pusher 51 has stopped moving upward. At this time, since the push-up members 57, 57 are continuously driven, the side cutter member 52 is moved to the side cutter member 52 as shown in FIG.
Pusher 5 while resisting the elastic force of springs 58, 58
It will move upward above 1. Along with the upward movement of the side cutter member 52, the side cutters 54, 54 cut the central portions of both side surfaces of the bag A in the thickness direction (broken line portion in FIG. 26). This side cutter member 5
2 continues to move upward until it is locked by the locking portions 49, 49 of the support body 50.

When the upward movement of the side cutter member 52 is stopped, the traveling member 48 is driven thereafter. In the state before the traveling member 48 is driven, the cutter 47 is
The operating body 48 a to which is attached is located at one end of the traveling member 48. Then, when the traveling member 48 is driven,
The operating body 48a travels (forwards) to the other end of the traveling member 48 together with the cutter 47, and then stops. At this time, since the upper surface of the bag A is in close contact with the cover portions 60, 60 of the support body 50, when the cutter 47 travels, the cutter 47 follows the traveling line as shown in FIG. The upper surface of A will be cut in the width direction.

When both side surfaces and the upper surface of the bag A are cut along a predetermined line as described above, only the lower surface is connected. Then, as shown in FIG. 28, the pusher 51 can be pulled up by the elastic force of the springs 58, 58 with the side cutter member 52 in the same position. At this time, the pusher 51 rises together with the bag A, and the inside of the lower surface of the bag A is covered with the cover portions 60, 60 of the support body 50.
Will come into close contact with. After that, the traveling member 48 is driven, and the actuator 48a located at the other end is moved to the cutter 47.
At the same time, it runs (returns) to one end and then stops. As a result, the cutter 47 cuts the lower surface of the bag A in the width direction according to the traveling line thereof, as shown in FIG.

Since the position of the side cutter member 52 and the traveling line of the cutter 47 have a corresponding positional relationship,
Cutting line of bag A by side cutters 54, 54 and cutter 4
The cutting lines of the bag A by 7 are almost connected to each other. Therefore, as a result of passing through the above dividing process, the bag A is opened by cutting the entire circumference of the central portion thereof. FIG. 18 is a diagram showing the state at that time, and the cutting device 2 is held in this state until the last step is finished thereafter.

Subsequent to the above dividing step, a discharging step is carried out. First, the bags A divided into two by the dividing device 2 are moved in the directions in which they are separated from each other by driving the conveyors 23 and 24. Then, as shown in FIG. 19, the drive of each of the conveyors 23 and 24 is stopped at the time when the conveyor 23 is located at a predetermined point. After that, as shown in FIG. 20, the driving members 29 and 30 of the carrying device 3 are driven to drive the respective conveyors 23 and 2.
4 is stopped after being switched from the horizontal state to the standing state.

Then, the respective halves of the bag A located on the upper surfaces of the conveyors 23, 24 drop into the discharge chamber 9 with their dividing openings facing downward. The respective half portions of the bag A fall while being guided by the guide plates 76, 76, and are hooked in a state of being covered with the blow-up portions 71, 71 of the air blower 4 (see FIG. 21). And bag A
Most of the contents of the bag A, each half of the bag A
It will fall due to the impact when hooked on 1.

Then, the driving members 29 and 30 are driven to
As shown in FIG. 22, the conveyors 23 and 24 are switched from the upright state to the horizontal state and returned, and then stopped. At this time, the bag holding members 77, 77 connected to the lower portions of the conveyors 23, 24 also operate integrally, and each half of the bag A is held in a state of being sandwiched between the bag holding member 77 and the blowing part 71. To be done. After this, for a predetermined period of time, in each half of the bag A, the blowing part 7
Air is blown from the air outlets 73, 73, ... Of 1, 71 at a predetermined short cycle (so-called pulse blow). Then, the bag A is blown by the air blowing output from the air outlets 73, 73, ....
The contents adhering to the inner surface of each half are blown off and fall. After that, by opening the opening / closing member of the discharge port 10 of the main body frame 1, the bag A is discharged from the discharge port 10.
The contents of can be discharged and taken out.

Subsequent to the discharging process, the bag discharging process is started. When the contents of the bag A are discharged to the outside, the driving members 29 and 30 are driven to switch the conveyors 23 and 24 from the horizontal state to the standing state and then stop. Then
The respective half portions of the empty bag A that have remained in the state of discharging the contents and being hooked on the blowing portions 71, 71 are released from the holding by the bag holding members 77, 77. After this, the air blower 4 is activated, and the air outlets 73, 7 of the air blowing parts 71, 71 are
Blow up the air from 3. Then, as shown in FIG. 23, the respective half parts of the empty bag A hooked on the blowing parts 71, 71 are blown up by the force of the air, and the bag discharge port 12 formed on the upper part of the cover 11 is closed. It goes to the bag discharge duct 78 through. Empty bag A that has passed through the bag discharge port 12
Will be stored in a storage chamber 79 provided in the middle of the bag discharge duct 78.

When the empty bag A is stored in the storage chamber 79,
The air blowing from the outlets 73, 73, ... Stops. Then, the driving members 29 and 30 of the transporting device 3 are driven to switch the conveyors 23 and 24 from the standing state to the horizontal state and then stop. Further, the push-up members 57, 57 of the cutting device 2 are driven to lower the pusher 51 and the side cutter member 52 that have been in the raised state. Further, the suction blow device 5 is stopped, and as a result,
It returns to the initial state as shown in.

In the bag opening machine described above, when the bag A is cut, the bag A is pushed up by the pusher 51 to bring the cut surface of the bag A into close contact with the cutter 47.
It is possible to suppress the generation of chips.

That is, although the chips are greatly increased and decreased depending on how the bag A is divided, in the bag opening machine described above, the bag A is pushed to the pusher 51 and the support 5 in the cutting process.
The bag A is divided while being sandwiched between the bag A and the bag. In this way, the cutter 47 is made to travel while the bag A is sandwiched between the pusher 51 and the support body 50, so that the cut state of the bag A can be sharpened.

Further, in the above bag opening machine, each half of the bag A is blown up by the blowing part 7 of the air blower 4 in the discharging process.
Since air is blown into the bag A from the blow-up portions 71, 71 when the bag A is hooked on the bag A,
The entire contents of can be discharged.

That is, when the respective halves of the bag A cut by the cutting device 2 are dropped from the conveyors 23, 24 and hooked on the blow-up parts 71, 71 of the air blow device 4, the bag A is shocked at that time. Most of the contents are discharged, but there is some residue on the inner surface of each half of bag A. Therefore, when air is blown into the inside of each half of the bag A from the blow-up parts 71, 71, the residue in each half of the bag A is blown off and forcedly discharged to the outside by the blowing output of the air. You can do it.

Further, in the above bag opening machine, since the cutting device 2 has the side cutter member 52 for cutting the side surface of the bag A, the side surface of the bag A is torn when the bag A is cut. It is designed so that it can be prevented from tearing or tearing.

That is, when the bag A to be divided has a large thickness and there is no side cutter member 52, the cutter 47 is run while the bag A is pushed up by the pusher 51 and the bag A is cut.
When the upper surface of the bag A is cut, the side surface of the bag A may be torn or torn from both ends of the cut portion due to the weight of the bag A. In this regard, according to the bag opening machine described above, the side cutter member 52 cuts both side surfaces of the bag A in a state where the pusher 51 presses the bag A against the support body 50 at the first stage of the cutting process, and then the cutter is cut. Since the upper surface of the bag A is cut at 47, it is possible to prevent tears and tears on both side surfaces of the bag A. Further, by raising the side cutter member 52, the entire side surface of the bag A in the thickness direction is surely cut. Therefore, even when the bag A is thick, the cutting can be easily and reliably performed. Will be possible.

Further, the above bag opening machine is equipped with a suction blower 5 for making a negative pressure inside the main body frame 1 which is in a substantially sealed state during the bag opening operation. Therefore, dust and the like of the contents generated during bag opening are prevented from leaking out of the main body frame 1. That is, dust or the like generated inside the main body frame 1 during bag opening is sucked from the bag discharge duct 78 by the suction force of the suction blower 5 and collected by a dust collecting member (not shown). Therefore, the environment around the bag opening machine can be always kept clean.

[0062]

As described above, according to the present invention, the contents are not left in the bag because the contents are once discharged and the air is blown into the bag by the air blower. . Therefore, the entire contents of the bag can be discharged.

Further, since the cutting device has the cutter that is run by the running member and the pusher that pushes the bag against the running member, the bag is cut while being in close contact with the cutter. As a result, the cut end of the bag becomes sharp, and the generation of chips can be suppressed.

Further, since the cutting device has a side cutter member dedicated to cutting the side surface of the bag, the side surface of the bag is not torn or torn during the cutting. It has become. Moreover, since the side cutter member cuts the side surface of the bag in the thickness direction, the side cutter member can be easily cut even if the bag is thick.

When a suction blow device for making a negative pressure inside the body frame which is almost sealed is provided,
This has an effect of preventing dust generated during bag opening from leaking to the outside.

[Brief description of drawings]

FIG. 1 is a schematic view of a bag opening machine according to the present invention.

FIG. 2 is a schematic front view showing an embodiment of the bag opening machine according to the present invention.

FIG. 3 is a plan view of FIG.

FIG. 4 is a front view showing the internal structure of the bag opening machine according to the present invention.

FIG. 5 is a diagram showing the plane in FIG. 4 with a part thereof omitted.

FIG. 6 is a diagram showing a right side surface of FIG. 4 with a part thereof cut away.

FIG. 7 is a first diagram illustrating the operation of the internal structure.

FIG. 8 is a second diagram illustrating the operation of the internal structure.

FIG. 9 is a view showing a structure of a cutting device.

10A and 10B are views showing a support, FIG. 10A is a plan view, FIG. 10B is a front view, and FIG. 10C is a sectional view taken along line XX in FIG.

11A and 11B are views showing a pusher, in which FIG. 11A is a plan view, FIG. 11B is a front view, and FIG. 11C is a sectional view taken along line YY in FIG.

12A and 12B are views showing a holder of a side cutter member, in which FIG. 12A is a plan view and FIG. 12B is a front view.

FIG. 13 is a view showing a bag holding member.

FIG. 14 is a diagram showing a positional relationship between a bag holding member and a guide plate.

FIG. 15 is a first diagram showing an outline of a carrying process.

FIG. 16 is a second diagram showing the outline of the carrying step.

FIG. 17 is a first diagram showing an outline of a dividing step.

FIG. 18 is a second diagram showing the outline of the dividing step.

FIG. 19 is a first diagram showing the outline of the discharging step.

FIG. 20 is a second diagram showing the outline of the discharging step.

FIG. 21 is a third diagram showing the outline of the discharging step.

FIG. 22 is a fourth diagram showing the outline of the discharging step.

FIG. 23 is a first diagram showing an outline of a bag discharging process.

FIG. 24 is a second diagram showing the outline of the bag discharging process.

FIG. 25 is a first diagram showing a bag dividing process.

FIG. 26 is a second view showing a bag dividing process.

FIG. 27 is a third diagram showing a bag dividing process.

FIG. 28 is a fourth diagram showing a bag dividing process.

FIG. 29 is a fifth view showing a bag dividing process.

[Explanation of symbols]

 1 ... Main body frame 2 ... Dividing device 3 ... Conveyor device 4 ... Air blow device 5 ... Suction blow device 6 ... Carry-in device 7 ... Base 8 ... Leg 9 ... Discharge chamber 10 ... Discharge port 11 ... Cover 12 ... Bag discharge port 13 ... Carrying port 14 ... Opening / closing cover part 15 ... Side cover part 15a ... Ceiling cover part 16, 25, 26, 55 ... Pressure cylinder 17, 27, 28, 56 ... Rod 18, 29, 30 ... Driving member 19a ... Lid member 19b ... Connecting member 20 ... Shutter 21 ... Rotating shaft 21a ... Lever 22, 63, 66 ... Mounting portion 23. 1 conveyor (conveying member) 24 ... 2nd conveyor (conveying member) 31, 32 ... side plate 33, 34, 35, 36 ... roller 33a, 34a, 35a, 36a ... pulley 37, 38 ... motor 39, 40 …… Bell G 41, 42 ...... Pivot members 43, 44 …… Support shafts 45,46 …… Arms 47 …… Cutters 48 …… Running members 48a …… Actuators 49 …… Locking parts 50 …… Supports 51 …… Pusher 52 …… Side cutter member 53 …… Holder 54 …… Side cutter 57 …… Pushing member 58 …… Spring (biasing member) 59 …… Oil damper 60 …… Cover part 61 …… Gap 62 …… Plate Part 64, 70 ...... Spacer 65 ...... Insertion hole 67 ...... Holding part 68, 69 ...... Spring mounting part 71 ...... Blowup part 72 ...... Air tank 73 ...... Blowout port 74 ...... Passage 74a ...... Mounting hole 75 ... ... Side cover 76 ... Guide plate 76a ... Notch 77 ... Bag holding member 78 ... Bag discharge duct 79 ... Storage chamber 80 ... Nozzle 81 ... Partition plate 82 ... Hinge A ... Bag F ... Transport surface

Claims (6)

(57) [Claims] 1. The bag (A) is attached to a main body frame (1) having a discharge chamber (9) having a downward discharge port (10), a carry-in port (13) for the bag (A), and a bag discharge port (12). ) A cutting device (47) for cutting the bag (A) in a direction traversing the upper and lower surfaces, and a side cutter member (52) for cutting a side surface of the bag (A) in the thickness direction (). 2) and a pair of conveying members (23, 23) which are provided above the discharge port (10) so as to be adjacent to each other with the dividing device (2) interposed therebetween, and each of which can switch between a horizontal state and a standing state. A delivery device (3) having 24) and an air blowing device (4) provided in the discharge chamber (9) and having a pair of blow-up parts (71, 71), and the contents are sealed therein; The bag (A) carried in from the carry-in port (13) is conveyed by the carrying device (3) to a pair of carrying members. After being located between (23, 24) and stopped, each half of the divided bag (A) is cut by the cutting device (2), and the conveying member (23, 24) is erected. After switching, the air blower (4) is dropped and hooked on the blow-up part (71, 71) of the air blower (4), and after the contents are dropped and discharged, the empty bag (A) is removed from the body frame (1). The bag opening machine is characterized in that the bag is discharged from the bag discharge port (12). 2. The cutting device (2) comprises a cutter (47).
A traveling member (48) for traveling the cutter (47) so as to traverse the bag (A), and the traveling member (48)
A side cutter member (5) which is provided so as to face the bag and is raised by a push-up member (57) to cut the side surface of the bag (A).
2) and a pusher (51) that pushes up the bag (A) in conjunction with the side cutter member (52), and the pusher (51) moves the bag (A) to the running member (4).
8) and press the side cutter member (5
2. The cutter (47) cuts the upper and lower surfaces of the bag (A) after 2) cuts both side surfaces of the bag (A).
The bag opening machine described. 3. A discharge chamber (9) having a downward discharge port (10), a carry-in port (13) for a bag (A), and a bag discharge port (12), and the inside is substantially sealed. The main body frame (1) is provided with a dividing device (2) for dividing the bag (A) and the dividing device (2) above the discharge port (10) so as to sandwich the dividing device (2) therebetween. A pair of conveying members (2 that can switch between a horizontal state and a standing state).
3, 24), an air blower (4) provided in the discharge chamber (9) and having a pair of blow-up parts (71, 71), and the main body frame (1).
And a suction blow device (5) for making the inside of the container a negative pressure, and the bag (A) in which the contents are enclosed and carried in from the carry-in port (13) is paired by the carrying device (3). After being positioned between the transport members (23, 24) and then stopped, each half of the divided bag (A) is divided by the dividing device (2), and the conveying members (23, 24) are erected. When the air bag device (4) is dropped by the switching to the state, the air blow device (4) is hooked on the blow-up parts (71, 71) respectively, and the contents are dropped and discharged, and then the empty bag (A) is removed from the main body. A bag opening machine which discharges from a bag outlet (12) of a frame (1). 4. The cutting device (2) comprises a cutter (47).
A traveling member (48) for traveling the cutter (47) so as to traverse the bag (A), and the traveling member (48)
And a pusher (51) which is provided so as to face the bag (A) by a push-up member (57) and pushes up the bag (A) by the pusher (51).
The bag opening machine according to claim 3, wherein the cutter (47) cuts the bag (A) in a state of being pressed against the bag. 5. A discharge chamber (9) having a downward discharge port (10), a carry-in port (13) for a bag (A), and a bag discharge port (12), and the inside is almost sealed. The main body frame (1) has a cutter (47) for cutting the bag (A) in the direction crossing the upper and lower surfaces, and a side cutter member (52) for cutting the side surface of the bag (A) in the thickness direction. The cutting device (2) for cutting the bag (A) and the cutting device (2) are provided adjacent to each other above the discharge port (10) with the cutting device (2) interposed therebetween. A transport device (3) having a pair of transport members (23, 24) that can be switched between them, and an air blow device (4) provided in the discharge chamber (9) and having a pair of blow-up parts (71, 71). )
And a suction blow device (5) for making the inside of the main body frame (1) a negative pressure, and the bag (A) in which the contents are enclosed and carried in from the carry-in port (13), After the transfer device (3) is positioned between the pair of transfer members (23, 24) and stopped, the transfer device (3) divides the bag, and each half of the cut bag (A) is transferred to the transfer device (3). Member (23,2)
4) When the air blower (4) is switched to the upright state, the air blower (4) is dropped and hooked on the blow-up part (71, 71) of the air blower (4), and the contents are dropped and discharged, and then the bag (A) becomes empty. ) Is discharged from the bag discharge port (12) of the main body frame (1). 6. The cutting device (2) comprises a cutter (47).
A traveling member (48) for traveling the cutter (47) so as to traverse the bag (A), and the traveling member (48)
A side cutter member (5) which is provided so as to face the bag and is raised by a push-up member (57) to cut the side surface of the bag (A).
2) and a pusher (51) that pushes up the bag (A) in conjunction with the side cutter member (52), and the pusher (51) moves the bag (A) to the running member (4).
8) and press the side cutter member (5
The cutter (47) cuts the upper and lower surfaces of the bag (A) after 2) cuts both side surfaces of the bag (A).
The bag opening machine described.