JPH0356970B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bag opening device for a grain storage bag.

In a series of automatic grain bagging devices, a pair of magnets attracts the grain storage bag, which is fed out from the empty bag storage position to the grain filling position, from both sides to magnetic bodies fixed on both sides of the upper part of the grain storage bag. In the case of a bag that can be pulled up and opened using a bag opening device, there are advantages in that the grain storage bag can be pulled up and filled with grain without bending at the bottom of the bag, and that the grain storage bag can be filled to a predetermined weight. It has the advantage that the bag can be automatically separated from the magnet, but when this bag opening device with a pair of magnets is activated when there is no grain storage bag, the two magnets that approach each other attract each other. As a result, a large amount of force is required to separate the two attracted magnets, resulting in deformation or damage to various parts of the bag opening device.

The present invention was devised in view of the above-mentioned circumstances and to eliminate the drawbacks, and even if a bag opening device equipped with a magnet operates when there is no grain storage bag, both magnets An object of the present invention is to provide an automatic bag-opening device for grain storage bags that can prevent deformation or damage to each part of the automatic bag-opening device by weakening the attraction force when the bags come close to each other and making it easier to separate them. That is.

The opening safety device for a grain storage bag according to the present invention achieves the above object.
In an automatic bag opening device having a pair of magnetic bodies fixed to both outsides of the upper part of a grain storage bag from both sides and pulled up and opened, a non-magnetic material is attached to the attraction surface of the pair of magnetic bodies. It is characterized by intervening.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, drawings showing one embodiment of the present invention will be described.

Reference numeral 1 denotes a grain hopper, into which grains threshed by an automatic threshing machine 1a are fed from above by a grain lifting machine 1b attached to the automatic threshing machine 1a, and are stored therein. A discharge port 1c is opened below the grain hopper 1. Both the grain hopper 1 and the automatic threshing machine 2 are mounted on a traveling machine, and the whole is configured as a combine harvester or a harvester.

A discharge cylinder 6 is fitted into the discharge port 1c so as to be movable up and down, and the upper end opening 6a of the discharge cylinder 6 is connected to the eaves plate 3.
In the raised position facing the grain hopper 1, the discharge port 1c is closed, and in the chain line position where the discharge cylinder 6 is lowered by a predetermined height from the eaves plate 3, the upper end opening 6a communicates with the inside of the grain hopper 1 and opens the discharge port 1c. The opening and closing of the discharge port 1c by the discharge tube 6 is performed by a discharge tube lifting device K, which will be described later, and which is provided below the grain hopper 1 in the embodiment.
The system is configured to perform the following steps.

A pair of left and right guide rods 4 extending substantially horizontally is provided below the grain hopper 1, and the guide rods 4 are inserted through insertion holes 51 provided on the left and right sides of the upper opening of the grain storage bag 50. 50 grain storage bags
is supported by a guide rod 4. This bag feeding device automatically feeds out the grain storage bags 50 one by one from the empty bag storage section J to the grain filling section below the discharge port 1c.
In the embodiment, it is configured like a bag dispensing device L which will be described later.

As shown in FIG.
4 and 54 while fixing the magnetic bodies 5 on both sides.
A pair of magnets 9 that attract 4 from both sides, respectively.
A bag opening device M having a diameter of 0.0,90 is provided in the grain filling section centered around the discharge port 1c, and the magnetic body 54 of the grain storage bag 50 fed out to the grain filling position is The bag is attracted to the body 90, and the upper edge of the opening is pulled up and opened by the operation of a bag opening device M, which will be described later. By protruding a non-magnetic material 90a made of non-ferrous synthetic resin or rubber as shown in FIG. 13 on the attraction surface of the magnet 90 on the side of the automatic bag opening device M, 90,9
A non-magnetic material 90a is interposed between the two adsorption surfaces.

And, on the magnetic body 54 side of the grain storage bag 50,
As shown in FIG. 15, the non-magnetic material 9 on the bag opening device M side
A non-magnetic material 90a protrudes from a portion facing 0a.
By providing the notch 54a into which the grain storage bag 50 can be fitted, it is possible to secure an attraction surface on which the magnet 90 on the bag opening device M side and the magnetic body 54 on the grain storage bag 50 side can be attracted. 50 grain storage bags
Utilizing the attraction force between the magnetic body 54 on the side and the magnet 90 on the side of the bag opening device M, the upper edge of the opening of the grain storage bag 50 in the grain filling position is pulled up and opened by the operation of the bag opening device M. can do.

Therefore, the non-magnetic material 9 is placed on the attraction surface of the magnet 90.
By protruding 0a, the grain storage bag 5
Even when the automatic bag-opening device M is activated and both the magnet bodies 90 are attracted to each other when the bag is not in the grain filling position, the predetermined interval T still exists between the two magnet bodies 90 as shown in FIG. , the attraction force between the two magnet bodies 90 becomes weaker, and less force is required to separate the two magnet bodies 90 from each other, so that deformation or damage of each part can be avoided without making each part of the bag opening device particularly strong. It can be prevented.

Hereinafter, details of each main part of each device shown in the embodiments of the present invention will be explained.

[Grain storage bag 50] As shown in FIG. 12, the grain storage bag 50 is sewn from breathable fiber cloth into a shape in which both side edges and the lower edge of the bag body are closed and the upper edge is open. There is. An insertion hole 51 for inserting the guide rod 4 is provided on both sides of the opening at the upper edge, reinforced with eyelets, and a magnetic material 52 such as an iron plate is attached near the insertion hole 51. In this embodiment, the magnetic body 52 is bent twice so as to straddle the upper edge of the bag, sandwiching both the front and back sides, and is fixed with rivets 53. In addition, a magnetic material 54 such as an iron piece is covered with a cloth 55 and sewn into both outer surfaces of the bag body at the center position in the upper width direction.

[Discharge port lifting device K]

As shown in FIGS. 3 and 5, an arm 8 fixed to an end of a transmission shaft 21a rotatably supported by a frame integrally fixed to the grain hopper 1 is integrally connected to the transmission shaft 21a. The elongated hole 8a provided in the arm 8 engages with a pin 6b fixed to the side surface of the discharge cylinder 6, and as the arm 8 rotates between positions a and b, the discharge cylinder 6 is rotated. is moved up and down so that when the arm 8 is in the a position, the discharge tube 6 closes the discharge port 1c, and when the arm 8 is in the b position, the discharge tube 6 opens the discharge port 1c. The other grain hopper 1 in the pair is also provided with an arm 8' having a similar structure, and a pin 6b on the side surface of the discharge cylinder 6 is engaged with the elongated hole 8a' of the arm 8'. This arm 8' connects the arm 11' fixed to the shaft 21a' with the rod 1.
2 to the arm 11 fixed to the transmission shaft 21a. Therefore, the arm 8' is adapted to move in synchronization with the arm 8 described above.

On the other hand, a gear 2 fixed to the other end side of the transmission shaft 21a
1 is meshed with a pinion gear 20 driven by a motor 10 capable of forward and reverse rotation. Therefore, the discharge cylinder 6 is moved up and down by the power of the motor 10.

The motor 10 is stopped when the arm 8' turns on the switch S8 when the discharge cylinder 6 moves to the raised position a and closes the discharge port 1c. Further, the motor 10 rotates in the opposite direction, and the discharge cylinder 6 descends.
When the discharge port 1c is opened, the arm 8' moves to the lowered position b and the reverse rotation is stopped by turning on the switch S5.

13 and 13' are the left and right grain hoppers 1, respectively.
Full detection sensors 13 and 13' are provided above the outlet 1c in the grain storage bag 50 and turn on when the outlet 1c is blocked due to the grain storage bag 50 being full. It is detected and operates to issue a start signal to the motor 10 to raise the discharge cylinder 6.

In the electric circuit shown in FIG. 16, reference numeral 15 is a manual switch, which is provided outside the lower part of the grain hopper 1 as shown in FIGS. 1 and 2. This manual switch 15 gives priority to automatic operation based on the fullness detection sensors 13, 13', and allows manual operation of the discharge tube 6 at any time.
When the neutral manual switch 15 is turned on to the point s side, the relay 307 is switched and the motor 10 is rotated to lower the discharge cylinder 6. Also, point u
When turned on to the side, the relay 308 is switched, causing the motor 10 to rotate in the opposite direction to raise the discharge cylinder 6 and close the discharge port 1c. Therefore, it is very convenient when interrupting a series of automatic operations.

In the electric circuit shown in Fig. 16, 300,3
01 and 302 are monostable multicircuits whose output becomes L for a short period of about 1 second due to a falling signal of the input.

In addition, the switch S7 is turned from OFF to ON when a movable plate 84 of a bag opening device M, which will be described later, reaches the raised position, and the empty grain storage bag 50 is transferred to the discharge port 1c by the bag opening device M, which will be described later. It operates from OFF to ON when it is pulled up to cover the outside.

When the grain storage bag 50 is pulled up in this way and the switch S7 is turned on, the discharge cylinder 6 is in the closed raised position, so the switch S5 is turned on.
It is OFF. Therefore, by turning on the switch S7, S of the flip-flop 305 becomes L and R becomes H.
Since Q outputs H, the relay 307 switches, the motor 10 lowers the discharge tube 6,
Rotate in the direction to open the discharge port 1c. Here, due to the monostable multicircuit 300, S of the flip-flop 305 immediately changes from L to H, but R is H and Q remains H. When the discharge cylinder 6 is lowered to the open state and the switch S5 is turned on, the R of the flip-flop 305 becomes L, and since S is H, Q is reset to L, and the motor 10 stops. Switch S8 is turned ON by lowering the discharge cylinder 6.
It changes from OFF to OFF, but the full detection sensor 13,1
Flip-flop 3 unless 3' is turned ON.
The output of 06 remains at L, and the motor 10 does not start.

Next, when the grain storage bag 50 becomes full and the fullness detection sensors 13 and 13' are turned on, S of the flip-flop 306 becomes L and the switch S is turned on.
8 is OFF, R outputs H and Q outputs H. Therefore, the motor 10 rotates in the opposite direction, and the discharge tube 6 rises to close the discharge port 1c. This rise of the discharge cylinder 6 turns on the switch S8, so
The monostable multi-circuit 302 detects the fall of the input and outputs an instantaneous output L. Therefore, the flip-flop 306 is reset with S set to H, R set to L, and Q set to L, so that the motor 10 is stopped.

[Bag feeding device L]

As shown in FIGS. 3 to 5, three guide rails 34, 34, 34 are arranged across the discharge ports 1c of the two left and right grain hoppers 1, and the guide rails 34 are attached to the frame 36. It is fixed. A transmission shaft 33 is provided on the frame 36 side of the guide rail 34 and is pivotally supported across all of the guide rails 34.
A sprocket 32a is fixed at a position adjacent to the guide rail 34 on each of the sprockets 3. Further, a sprocket 32b is rotatably supported on the opposite side of each guide rail 34, and a chain 35 is stretched between the sprocket 32b and the sprocket 32a.

On the other hand, a motor 22 capable of forward and reverse rotation is attached to a bracket 24 fixed to the opposite side of the frame 36. The drive shaft 25 of this motor 22 is the shaft 2
A chain 28 is stretched between a sprocket 27 fixed to the shaft 26 and a sprocket 29 fixed to the transmission shaft 33.
The power of 2 is transmitted to a transmission shaft 33. Therefore, when the motor 10 rotates forward and backward, the chain 35 moves back and forth along the guide rail 34.

A bracket 44 is fitted onto the guide rail 34 via rollers 42 so as to be able to reciprocate along the guide rail 34. Further, a magnet body 45 made of a permanent magnet is attached to the bracket 44, and the chain 35 is connected thereto. Therefore, as the chain 35 reciprocates as described above, the magnet body 45 is attached to the bracket 4.
4, the magnet body 45
is configured as a moving magnet. At both ends of the reciprocating path of this movable magnet, there are respective brackets 4.
Switches S3 and S4 are provided oppositely at positions corresponding to 4, and these switches S3 and S4 are turned ON when the bracket 44 comes into contact with the motor 22, thereby stopping the rotation of the motor 22.

Furthermore, switches S1 and S2 are provided at the innermost side of the empty bag storage section J to detect the presence or absence of empty bags, corresponding to the left and right grain storage bags 50 and 50, respectively. As shown in FIG. 5, it is provided at a position outside the moving path of the moving magnet, and only when the grain storage bag 50 is present in the empty bag storage section J, the pressing force of the moving magnet is applied through this grain storage bag 50. It works and turns on. In other words, when there is no grain storage bag 50 in the empty bag storage section J, the moving magnet does not come into contact with the switch S1, S2.
is no longer working.

Further, the guide rail 34 is configured to be able to swing between A and B around a shaft 26 that is pivotally supported by the body frame 30. A frame 37 is fixed to the guide rail 34 so as to cross the upper surface of the guide rail 34, and is interlocked with the above-mentioned discharge cylinder lifting device K via the frame 37. In other words, the bracket 3 is placed on the top surface of the frame 37.
8 is fixed, and this bracket 38 is the link 3.
The guide rail 34 is interlocked by being connected to the arm 9 fixed to the transmission shaft 21a on the side of the discharge cylinder elevating device K via the arms 9, 40, and 41. The link 40 is rotatable about a shaft 40a, and a long hole in the link 39 is engaged with one end of the link 40. Therefore, when the discharge cylinder 6 is in the raised position a, the links 39, 40, and 41 are in the position a in the figure, and the guide rail 34 is in a substantially horizontal state as shown by A, but the discharge cylinder 6 is in the lowered position b. Then, the links 39, 40, and 41 are at position b in the figure, and the guide rail 34 is moved to an inclined state as shown by B.

Now, in the bag dispensing device L described above, when the bag dispensing device L is in an inactive state, the movable magnet is on standby at position A shown in FIG. From this state, when the motor 22 is rotated by the bag feed signal, the magnet body 45 of the moving magnet moves toward the empty bag storage section J together with the bracket 44.

Due to this movement of the moving magnet, the magnet body 45 attracts the magnetic body 52 of the grain storage bag 50 located on the outermost side and continues to press it. Due to this pressing, the plurality of grain storage bags 50 are pressed one after another, and the switch S
1. Turn on S2 and sense the presence of the grain storage bag 50. When both switches S1 and S2 are turned on, the rotation of the motor 22 stops once and then immediately rotates in the opposite direction, and the grain storage bag 50, which is attracted to the magnetic body 45 of the moving magnet, is directed towards the lower part of the discharge port 1c. and move. Then, the bracket 44 is connected to the switch S4.
When the motor 22 comes into contact with the motor 22 and turns it on, the motor 22 stops. As a result, the pair of left and right grain storage bags 50 are respectively delivered to the grain filling position.

The grain storage bag 50 fed out to the grain filling position is
The bag is opened wide in both the front and rear directions by a bag opening device M, which will be described in detail later, and is pulled up to a position covering the outside of the discharge port 1c. Next, the motor 10 rotates and the arms 8, 8' lower the discharge cylinders 6, 6.
At the same time when the lower end of the discharge tube 6 is inserted into the grain storage bag 50 and grains are supplied, the guide rail 34 changes from the horizontal state A to the inclined B state in conjunction with the lowering of the discharge tube 6. to rise like that. As the guide rail 34 rises, a shearing force along the surface direction acts between the magnet body 45 and the magnetic body 52 of the grain storage bag 50, so the magnet body 45 on the moving magnet side is supported by the guide bar 4. It easily separates from the magnetic body 52 on the side of the bag 50 that has been removed. In other words, the attraction force of the magnet acts strongly in the direction perpendicular to the surface of the magnetic body 52, but is small in the direction along the surface, so the magnetic body 52
By moving the 5 side in the direction along the surface of the magnetic body 52, it can be easily removed.

The motor 10 is stopped by raising the guide rail 34, lowering the discharge cylinder 6, and turning on the switch S5. After this motor 10 is stopped, the other motor 22 rotates by a certain angle, moves the moving magnet from the position A to the position A in the figure, and then stops.

When the grain storage bag 50 becomes full and the fullness detection sensors 13 and 13' are both turned on, the motor 10 rotates and the discharge tube 6 rises to close the discharge port 1c. With this closure, the guide rail 34 returns to the horizontal state of A, but the moving magnet remains in position A and waits for the next collection process so as not to interfere with the removal of the full bag.

[Bag opening device M]

As shown in FIGS. 6 to 11, 93 is a guide plate fixed to the lower side surface of the grain hopper 1. As shown in FIGS.
A movable plate 84 is slidably guided in the vertical direction with respect to this guide plate 93 via rollers 97 attached to the inner surface thereof, so that it can reciprocate. on the other hand,
Reference numeral 80 denotes a motor capable of forward and reverse rotation, and an arm 80a is fixed to the drive shaft of this motor 80 so as to swing back and forth in the left-right and front-rear directions. A pin provided at the tip of the arm 80a engages with a long groove of the arm 82, and the arm 82 is integrally fixed to a shaft 81 rotatably supported on the frame. An arm 83 is fixed to the shaft 81 and rotates together with the shaft 81. This arm 8
The long groove 83a provided at the tip of the moving plate 84
It engages with a pin 84a fixed to the outer surface. Therefore, the reciprocating rotation of the motor 80 causes the movable plate 84 to reciprocate up and down.

S6 is a switch provided at the lower end of the guide plate 93,
When the moving plate 84 moves to the lowered position, it comes into contact with
It turns on and stops the rotation of the motor 80. Also, S7 is a switch provided at the upper end of the guide plate 93, which is turned on when the movable plate 84 comes into contact with it when it moves to the raised position.
The rotation of the motor 80 in the opposite direction is stopped.

At both ends of the movable plate 84, a pair of front and rear rings 86, 87, which serve as bag opening tools, are rotatably supported, and at the other end of the links 86, 87, a plate 88 is pivotally supported. The whole forms a parallel link. A magnet body 90 made of a permanent magnet is fixed to the plate 88 via a mounting plate 89.

On the other hand, an arm 91,
91 is fixed, and the arms 91, 91 are connected to each other by a spring 92. For this reason,
Each of the links 86 and 87 of the bag-opening tool always maintains a wide-angle posture in which the tip side (the side on which the plate 88 is attached) is spread forward and backward at the position shown by the solid line.

Further, a cam 95 is fixed to the upper end side of the link 86. When this cam 95 descends from the raised position d to the lowered position c together with the movable plate 84, it comes into contact with a stopper 94 fixed to the lower side surface of the guide plate 93, and each of the front and rear links 86, 8 as shown by the broken line
7 is moved from the front-rear direction of the grain storage bag 50 in a direction in which the magnet bodies 90 approach each other toward the center, and both magnetic bodies 54 of the grain storage bag 50 supported by the guide rod 4 are moved. Make contact and adsorption. Then,
When the movable plate 84 rises again with the bag 50 in the adsorbed state due to the reverse rotation of the motor 80, the cam 95 separates from the stopper 94 and closes the front and rear links 86, 8.
7 is opened outward, and the grain storage bag 50, whose left and right sides of the opening are supported by the guide rod 4, is pulled up with both sides of the central opening expanded in the front and rear directions, so that the grain storage bag 50 is The upper edge of the bag, which was lower than the lower end of the outlet 1c in the C state, becomes the D state where it covers the outside of the outlet 1c, and the bag is bent so as to be bent on the floor 60 as in the C state. The lower part is stretched like the D state.

Therefore, according to the bag opening device M of the present invention, the grain storage bag 50 at the grain filling position is attracted to both the magnetic bodies 90 at the tip of the bag opening tool via the magnetic bodies 54 on both sides, and is opened. Since the portion is widened, the outside of the discharge port 1c can be largely surrounded and the discharge tube 6 can be inserted reliably and smoothly. Moreover, the grain storage bag 50 is
By pulling the bag upward, the flexure at the bottom of the bag is stretched, so that the grain can be filled evenly to the bottom of the bag. In addition, since only the central portion of the grain storage bag 50 is pulled up using a magnet, when a predetermined amount of grain is filled into the bag, the grain weight causes the bag 50 to be pulled up.
Since the side magnetic body 54 is automatically detached from the magnet body 90 on the side of the bag opening device M, the detachment step is unnecessary, and the steps in a continuous series of automatic grain bagging devices can be simplified.

[Full bag puller device N]

As shown in FIGS. 1 to 3, the grain storage bag 50
The guide rod 4 for supporting the cylinder rod 4a and the rod rod 4
b are configured to slidably fit together. On the other hand, 67 is the floor 60 in the empty bag storage section J.
The cover covering the upper surface prevents the lower part of the empty grain storage bag 50 from directly interfering with the upper surface of the moving floor 60. Reference numeral 68 denotes a partition plate provided at the boundary position of the empty bag storage section J to prevent interference between the empty bags and the bags fed out below the discharge port 1c, and to prevent them from coming together.

A hydraulic cylinder 65 is installed on a frame provided below the floor 60, and the tip of a piston rod 66 of the hydraulic cylinder 65 is fixed to the back surface of the apron where the front end of the floor 60 is bent. Therefore, by operating the hydraulic cylinder 65, the floor 60 located at the solid line position in the figure can move forward together with the rod 4a of the guide rod 4 to the forward position shown by the broken line, or return to the original position. . Switch S9
When the floor 60 moves forward and the rear end comes off the switch S9, the hydraulic oil switching valve for the hydraulic cylinder 65 is closed to stop the piston rod 66 from moving forward. Also, Switch S10 is on floor 6.
When the piston rod 0 moves backward and its rear end contacts the switch S10, the hydraulic oil switching valve for the hydraulic cylinder 65 is closed to stop the piston rod 66 from moving back.

With the above configuration, the grain storage bag 50
When the bag is full, the hydraulic cylinder 65 is actuated to pull out the full bag forward together with the floor 60, and the next empty bag is moved to the grain filling position by the bag feeding device L while leaving the full bag in the pulled out state. It is possible to immediately move on to the next grain storage process. Therefore, it is possible to work with full bags lined up in front and behind each other, thereby allowing more time for the work. You will be able to take as much as you can.

In short, the automatic grain storage bag opening device according to the present invention pulls up and opens the grain storage bag at the grain filling position by adsorbing it from both sides to magnetic bodies fixed to both upper and outer sides of the grain storage bag. In the automatic bag opening device having a pair of magnet bodies as described above, since a non-magnetic material is interposed on the attraction surface of the pair of magnet bodies,
Although the grain storage bag at the grain filling position can be pulled up and opened by the magnetic body of the bag opening device that attracts the magnetic body on the bag side, when the grain storage bag is not at the grain filling position, When the automatic bag opening device operates and the two magnets approach each other and attract each other, since there is a predetermined gap between the two magnets, the attraction force between the two magnets can be weakened. Since less force is required to separate the bags from each other, deformation or damage to each part of the automatic bag opening device can be prevented.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view showing the entire automatic grain bagging device, Fig. 2 is a vertical cross-sectional view of the discharge tube of the grain hopper, and Fig. 3 is a bag delivery system. FIG. 4A is a plan view showing only the main parts of FIG. 3, FIG. 4B is a plan view showing only the main parts of FIG. 4A, and FIG. 5 is a side view showing the device. 6 is a front view showing the bag opening device, FIG. 7 is a side view showing the bag opening device, FIG. 8 is an enlarged side view showing main parts of the bag opening device, and FIG. 9 is a front view showing the bag opening device. Arrow view of the figure,
Fig. 10 is a view taken from the X arrow in Fig. 8, Fig. 11 is a perspective view showing the cam part of the bag opening device, Fig. 12 is a perspective view showing the grain storage bag, and Fig. 13 is a perspective view showing the magnet body. 14 is an explanatory view showing the relationship between the magnet body and the non-magnetic body, FIG. 15 is a longitudinal sectional view showing the relationship between the magnet body and the grain storage bag, and FIG. 16 is an electric circuit. 1... Grain hopper, 1c... Discharge port, 4...
Guide rod, 50... Grain storage bag, 54... Magnetic material, 90... Magnetic material, 90a... Non-magnetic material, M...
...Bag opening device.

Claims (1)

[Claims] 1. In an automatic bag opening device having a pair of magnets, the grain storage bag at the grain filling position is pulled up and opened by being attracted from both sides to magnetic materials fixed to both upper and outer sides of the grain storage bag. A bag opening device for a grain storage bag, characterized in that a non-magnetic material is interposed between the attraction surfaces of a pair of magnets.