JPH0224435Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic bag opening device for a grain storage bag used in a grain storage device such as a threshing machine.

Conventionally, as grain storage bags used in this type of grain storage device, insertion holes provided on the left and right sides of the upper opening are inserted into guide rods and moved from the empty bag storage position to the lower position of the grain hopper. What has been done is known.

In addition, as an automatic feeding device that automatically feeds grain storage bags in the empty bag storage position one by one towards the lower position of the grain hopper, for example,
As in Japanese Patent Publication No. 53-24876, there is a sliding type of grain storage bag that utilizes the sliding of the grain storage bag itself guided by an inclined guide rod, or there is a method that uses a spiral blade in the horizontal direction as in Japanese Patent Publication No. 53-24876. A spiral blade type has been proposed.

In these conventional automatic dispensing devices using the sliding type or spiral blade type, the upper part of the bag body that is inserted through the guide rod is closed and closed by the filled grains provided at the upper side of the grain storage bag. The reality is that it can only be used with special grain storage bags equipped with a tongue, but the grain hopper is a bag opening device that opens the empty bag with the opening and closing tongue that closes with filled grains. It consists of a grain gutter that moves up and down on the side, and the grain is filled by the downward movement of the grain gutter that plunges into the opening/closing tongue of the grain storage bag that is stopped at the bottom of the grain gutter. It is common for there to be.

Further, for example, Japanese Patent Publication No. 41-9598 proposes a system in which the bag is inserted between a pair of suction members and transferred, and then the bag is opened by the pair of suction members. However, in the case of a combine harvester, etc., where the bag is inserted between the suction members as in this publication, after the grain storage bag in the empty bag storage position on the back side is pulled out horizontally, Since it is necessary to further raise the grain storage bag, there is a drawback that the empty bag transfer path for the grain storage bag and its bag delivery device become extremely complicated.

Furthermore, in the above-mentioned publication, the suction member moves in the bag opening direction the moment it suctions the bag, so the suction time for both is short and the bag opening is incomplete due to shocks and vibrations of the bag opening device that has the suction member. It had the disadvantage of becoming.

Therefore, in view of the conventional situation mentioned above, the present invention is
This was devised to eliminate this drawback, and by lifting and lowering the bag opening device with a magnetic body, the closed grain storage bag stored in the empty bag storage position is moved along the empty bag transfer path in an approximately horizontal direction. In addition to being able to move along the magnetic body of the grain storage bag side, the magnetic body of the grain storage bag and the magnetic body of the bag opening device side can be moved by moving the magnetic body attracted to the magnetic body of the grain storage bag side in the bag opening direction after a predetermined time has elapsed. It is an object of the present invention to provide an automatic bag opening device for a grain storage bag that can ensure the suction of grains.

The automatic bag opening device for grain storage bags according to the present invention achieves the above object, and the grain storage bags in a closed state stored in the empty bag storage position are fed out below the hopper along a substantially horizontal empty bag transfer path. A bag dispensing device for dispensing a bag toward a position, a dispensing stop means for stopping the bag dispensing device at a dispensing position, and a bag opening device above the dispensing position, wherein both sides of the grain storage bag are magnetically attached. While the body is attached, the bag opening device has a pair of pairs that move downward from a standby position above the upper edge of the grain storage bag to be fed out after the bag feeding device stops, and approach and attract the magnetic material on the grain storage bag side. a detecting means for detecting the downward attracting position of the magnetic body, an attracting maintaining means for stopping the magnet body and maintaining the attracting state of the magnetic body, and a detecting means for detecting the downward attracting position of the magnetic body; The present invention is characterized in that a bag-opening delay activation means is provided for opening the bag after a period of time has elapsed.

The present invention will be explained below with reference to embodiments shown in the drawings.

Fig. 1 shows the grain collecting section of a combine threshing machine equipped with the bag opening device of the present invention. It is thrown into the hopper 1. Two hoppers 1 are provided in parallel in the front and back directions of the paper, and a discharge port 1c is provided at the lower end of each hopper 1. As shown in Figure 2, the discharge port 1
A discharge cylinder 6 is fitted into c so that it can move up and down.
When the discharge cylinder 6 rises, the lower end 6a moves upward from the lower end of the hopper discharge port 1c, and the upper end faces the eaves plate 3 to close the discharge port 1c.
Further, when the discharge tube 6 is lowered, the lower end 6a is made to protrude below the lower end of the hopper outlet 1c, and the upper end is separated from the eaves plate 3 to open the outlet 1c. Such opening/closing operations of the discharge port 1c by the discharge tube 6 are performed by a discharge tube lifting device K provided below the hopper 1.

A guide rod 4 is provided horizontally below the hopper 1 on which a grain storage bag 50 is slidably suspended. The guide rod 4 has a cylindrical rod 4a and this cylindrical rod 4a.
It is composed of a bar rod 4b that is slidably fitted into the frame member 4b, and has a freely expandable and retractable structure. A bag dispensing device L, the details of which will be described later, is provided parallel to the guide rod 4. This bag dispensing device L performs an operation of dispensing the closed grain storage bags 50 one by one from the empty bag storage section to the lower part of the discharge port 1c at J. Further, above the bag dispensing device L, there is provided a bag opening device M of the present invention, the details of which will be described later. This bag opening device M widens the opening of the empty grain storage bag 50 led to the lower part of the discharge port 1c and pulls it up to cover the area around the discharge port 1c. moreover,
A full bag pull-out device N is provided for pulling out the grain storage bag 50, which is full of grains, forward from the working position while suspended from the telescopic guide rod 4.

The details of each main part of each device will be explained below.

[Grain storage bag 50] Figures 12 to 14 show the grain storage bag 50,
The bag body is constructed so that both side edges and the lower edge are closed, and the upper edge is open, and is sewn from breathable fiber cloth. Eyelets 51 for inserting the guide rod 4 are provided on both sides of the upper part, and a magnetic material 52 such as an iron plate is attached near the eyelets 51. The magnetic body 52 is folded twice, straddles the upper edge of the bag, and is fixed with rivets 53 so as to sandwich both the front and back sides. In addition, a magnetic material 54 such as an iron piece is wrapped in a cloth 55 and attached to both side surfaces at the center position between the eyelets 51, 51 at both ends.

FIG. 15 shows another embodiment of the grain storage bag 50, in which 5 magnetic materials per one side of the bag.
The number of 4 is not 4 as in the above embodiment, but 1
It is made individually.

[Discharge tube lifting device K]

Referring to FIGS. 3 and 5, a transmission shaft 21a is rotatably supported on a frame integrally fixed to the hopper 1, an arm 8 is fixed to the end of this transmission shaft 21a, and the transmission shaft 21a is attached to an arm. It is designed to rotate together with 8. Long hole 8 provided in arm 8
a engages with a pin 6b fixed to the side of the discharge cylinder 6,
When the arm 8 rotates between a and b, the discharge tube 6 is moved up and down, and the hopper discharge port 1c is opened and closed as described above. That is, when the arm 8 is at position a, the discharge tube 8 closes the discharge port 1c, and when the arm 8 is at position b, the discharge port 1c is opened. The other hopper in the pair is also provided with an arm 8' having a similar configuration, and its elongated hole 8'
A pin 6b on the side surface of the discharge cylinder 6 is engaged with a'. This arm 8' is integrally fixed to the shaft 21a', and the arm 11' fixed to the shaft 21a' is connected to the rod 12.
It is connected to the arm 11 fixed on the transmission shaft 21a side via. Therefore, the arm 8' is adapted to move in synchronization with the arm 8 described above.

A gear 21 is fixed to the other end of the transmission shaft 21a. This gear 21 is connected to the motor 1 which can rotate in forward and reverse directions.
A pinion gear 20 driven by 0 is in mesh. Therefore, the discharge cylinder 6 is moved up and down by the power of the motor 10.

The motor 10 causes the arm 8' to switch S when the discharge cylinder 6 reaches the raised position and closes the discharge port 1c.
It is stopped by turning on 8. Further, when the motor 10 reversely rotates and the discharge cylinder 6 descends to open the discharge port 1c, the arm 8' closes the switch S.
By turning on 5, the reverse rotation is stopped.

Reference numerals 13 and 13' designate fullness detection sensors provided above the discharge ports 1c of the left and right hoppers 1, respectively. These sensors 13, 13' are turned ON to detect when the grain storage bag 50 is full and the discharge port 1c is blocked, and output a start signal to the motor 10 to raise the discharge tube 6. .

[Bag feeding device L]

Referring to FIGS. 3 to 5, a pair of guide rails 34, 34 are arranged below each discharge port 1c of the two left and right hoppers 1, and the guide rails 34 are fixed to a frame 36. .
A transmission shaft 33 is provided on the frame 36 side of this guide rail 34 and is pivotally supported so as to cross all of these guide rails 34, and sprockets 32a are each fixed to a position on this transmission shaft 33 adjacent to the guide rail 34. has been done. Furthermore, 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 on the opposite side of the frame 36. The drive shaft 25 of this motor 22 is the shaft 26
and a sprocket 27 fixed to the shaft 26 and a sprocket 2 fixed to the transmission shaft 33.
A chain 28 is stretched between the motor 22 and the motor 22.
The power is transmitted to the transmission shaft 33. Therefore, when the motor 10 rotates forward and backward, the chain 35 reciprocates 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 permanent magnet 45 is attached to the bracket 44, and the chain 35 is connected thereto. Therefore, when the chain 35 moves back and forth as described above,
A bracket 44 is adapted to reciprocate together with a permanent magnet 45. That is, it constitutes a so-called moving magnet. At both ends of the reciprocating path of the moving magnet, switches S3 and S4 are provided oppositely at positions corresponding to the respective brackets 44.
3, S4 is turned ON when the bracket 44 comes into contact with the motor 22, and stops the rotation of the motor 22.

Further, at the innermost side of the empty bag storage section J, switches S1 and S2 for detecting the presence or absence of empty bags are provided corresponding to the left and right grain storage bags 50 and 50, respectively. As shown in FIG. 5, each switch S1, S2 is provided at a position away from the moving path of the moving magnet, and only when the grain storage bag 50 exists in the empty bag storage section J, the grain storage bag 50 is used. The pressing force of the moving magnet acts through 50 to turn it on. That is, 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 does not operate.

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 this guide frame 34 so as to cross the upper surface thereof, and via this frame 37,
It is designed to be interlocked with the above-mentioned discharge cylinder elevating device K. That is, the bracket 3 is placed on the upper surface of the frame 37.
8 is fixed, and this bracket 38 is the link 3.
It is connected to an arm 9 fixed to a transmission shaft 21a on the side of the discharge cylinder elevating device K via 9, 40, 41, and a guide rail 34 is interlocked therewith. The above link 40 is a shaft 40
It is freely rotatable around a, and this link 4
A long hole of the link 39 is engaged with one end of the link 39. Therefore, when the discharge tube 6 is in the raised position A, the links 39, 40, and 41 are in the a position in the figure, and the guide rail 34 is in the approximately horizontal state shown by A, but the discharge tube 6 is in the lowered position b. Then, links 39, 40,
41 is in the b position in the figure and the guide rail 34 is B.
The state changes to a tilted state as shown in .

Now, in the bag dispensing device L mentioned above, the device L
When is in the inoperative state, the moving magnet is waiting at the position indicated by A in FIG. From this state, when the motor 22 is rotated by the bag feed signal, the permanent magnet 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 permanent magnet 45 attracts the magnetic body 52 of the grain storage bag 50 located on the outermost side and continues to press it. By this pressing, a plurality of grain storage bags 50 are pressed one after another, switches S1 and S2 are turned on, and the presence of the grain storage bags 50 is sensed. When both S1 and S2 are turned ON, the rotation of the motor 22 is stopped once and then immediately reversed, and the permanent magnet 45 of the moving magnet moves toward the lower part of the discharge port 1c with the grain storage bag 50 that has been attracted. . When the bracket 44 contacts the switch S4 and turns it on, the motor 22 stops. As a result, a pair of left and right grain storage bags 50,5
0 are arranged below the discharge ports 1c and 1c, respectively.

When the grain storage bag 50 is placed below the discharge port 1c, the grain storage bag 50 is opened wide by a bag opening device M, the details of which will be described later, and is pulled up to a position covering the outside of the discharge port 1c. Next, motor 1
0 rotates, the arms 8, 8' lower the discharge tubes 6, 6, and insert the lower end 6a of the discharge port 6 into the grain storage bag 50. In conjunction with this lowering of the discharge cylinder 6, the guide rail 34 rises from the horizontal state A to the inclined state B. This guide rail 34
Due to this rise, a shearing force along the surface direction acts between the permanent magnet 45 and the magnetic body 52 of the grain storage bag 50, so that the permanent magnet 45 easily separates from this magnetic body 52. That is, the attraction force of the magnet acts strongly in the direction perpendicular to the surface of the magnetic material 52, but is small in the direction along the surface. If you move it in the direction along it, you can easily detach it.

When the guide rail 34 is raised and the discharge tube 6 is lowered to turn on the switch S5, the motor 10 is stopped. After the motor 10 is stopped, the motor 22 rotates by a certain angle, moves the moving magnet from the position B 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 position A, but the moving magnet remains in position A and waits for the next collection operation so as not to interfere with the removal of the full bag.

As described above, according to the bag dispensing device L, the task of setting the empty grain storage bag 50 is simple because it is only necessary to insert and push the empty grain storage bag 50 through the guide rod 4. In addition, since the magnetic material 54 is provided on the side of the grain storage bag 50, the grain storage bags 50 do not attract each other, and the permanent magnet 45 of the moving magnet reliably attracts and feeds each grain one by one. be able to. That is, if a permanent magnet is attached to the grain storage bag 50 side, a plurality of grain storage bags 50 will be connected to each other due to attraction between the magnets, and each grain storage bag 50 will be reliably fed out one by one. things become impossible.

In addition, in the above embodiment, the permanent magnet 4 is used as the moving magnet.
5 is used, but this magnet can be used as an electromagnetic magnet.

[Bag opening device M]

Referring to FIGS. 6 to 11, 93 is a guide plate fixed to the lower side surface of the 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, 80
The arm 80a is fixed to the drive shaft of the motor 80 and is configured to swing back and forth in the left and right 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. A long groove 83a provided at the tip of the arm 83 engages with a pin 84a fixed to the outer surface of the movable plate 84. 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 movable plate 84 comes to the lowered position, it comes into contact with the moving plate 84 to stop the rotation of the motor 80 which is turned on. Further, S7 is a switch provided at the upper end of the guide plate 93, and is a switch provided on the upper end of the guide plate 93.
When it reaches the raised position, it contacts and turns ON, stopping the rotation of the motor 80 in the opposite direction.

Links 86 and 87 are provided at both ends of the movable plate 84.
is rotatably supported, and links 86, 87
A plate 88 is pivotally supported on the other end side, forming a parallel link as a whole. A permanent magnet 90 is fixed to the plate 88 via a mounting plate 89.

On the other hand, an arm 9 is provided on each side of the links 86, 86 arranged on both sides to which the movable plate 84 is pivoted.
1 and 91 are fixed, and the arms 91 and 91 are connected to each other by a spring 92. Therefore, due to the elastic force of the spring 92, the links 86 and 87 always maintain a wide-angle posture with the tip side (the side where the plate 88 is attached) spread outward, as shown by the solid line.

Further, a cam 95 is fixed to the upper end side of the link 86. This cam 95 together with the moving plate 84
When descending from the ascending position d to the descending position c, the guide plate 93 comes into contact with a stopper 94 fixed to the lower side surface, and the left and right links 86, 87 as shown by broken lines
The permanent magnets 90 move toward the center of each other, and the grain storage bag 50 contacts and attracts the magnetic bodies 54 on both sides of the grain storage bag 50. Next, when the motor 80 is reversed and the movable plate 84 rises again in the above-mentioned suction state, the cam 95 separates from the stopper 94 and opens the left and right links 86, 87 outward, widening the opening of the grain storage bag 50. while pulling it up. Therefore, the grain storage bag 50 is in the state D where the upper edge of the bag is below the lower end of the discharge port 1c as shown in state C, and covers the outside of the discharge port 1c. At the same time, the lower part of the bag, which had been bent so as to be bent on the floor 60 as shown in C, was bent on the floor 60 as shown in D.
Make it so that it does not bend upwards.

Driving of the bag opening device M is started when the grain storage bag 50 reaches below the discharge port 1c by the bag dispensing device L and the switch S4 is turned on, using this as a start signal.

FIG. 16 shows an electric circuit for operating the bag opening device M mentioned above.

In this electric circuit, 102 and 106 are single multi-circuits, respectively, which produce outputs for operation as shown in FIGS. 17 and 18. Also, 105 is
This is a CR timer that outputs input and output for operation as shown in FIG.

The grain storage bag 50 is delivered to the discharge port 1 by the bag dispensing device L.
c, the movable plate 84 of the bag opening device M is in the lifting device d, and the switch S7 is
ON, switch S6 is in the OFF state. When the grain storage bag 50 is fed out below the discharge port 1c by the bag feeding device L, the switch S4 is turned on. When switch S4 is turned on, flip-flop 1
Since S of 00 is L and R is H, Q becomes H,
Also, since the output of the AND element 101a is H, the transistor Tr1 is turned on, and the relay 1
03 is switched, the motor 80 rotates, and the movable plate 84 is lowered.

When the moving plate 84 reaches the lowered position c, the switch S
6 is turned on, and by turning on this switch S6, the output of the AND element 101a becomes L, and the motor 80
stops, and the flip-flop 100 becomes S
becomes H, R becomes L, Q becomes L, and is reset. Further, the CR timer 105 and the monostable multi-circuit 102 are activated at the same time as the switch S6 is turned on. Since the switch S7 is OFF, the permanent magnet 90 is attracted to the magnetic body 54 of the bag, and after a certain period of time (after time _t1 in FIG. 18), the AND element 101b
The output becomes H, transistor Tr2 turns on, relay 104 switches, and motor 80 reverses. By reversing the motor 80, the grain storage bag 5
Since the grain storage bag 0 is pulled upward while the upper opening is widened, the opening operation of the grain storage bag 50 by the permanent magnet 90 attracted to the magnetic body 54 is started.

Then, when the movable plate 84 contacts the switch S7 at the raised position d and turns ON, the AND element 1
The output of 01b is turned OFF, and the motor 80 stops at its raised position.

As described above, according to the bag opening device M, the bag opening device M having the pair of magnet bodies 90 is configured to open the grain storage bag 50 that is fed out toward the feeding position on the empty bag transfer path.
The bag feeding device L is moved up and down between a standby position above the upper edge and a lower position where the magnetic body 90 approaches and attracts the magnetic body 54 of the grain storage bag 50 that has moved to the feeding position, and the bag feeding device L stops at the feeding position. Then, the grain storage bag 50 in the empty bag storage position is fed out along a substantially horizontal empty bag transfer path toward the feeding device without being disturbed by the bag opening device M. be able to.

Then, the bag opening device M starts descending when the stop switch S4 of the bag dispensing device L is turned on. The adsorption state by the magnet body 90 is continued by the adsorption maintaining members 94 and 95 that stop and maintain the adsorption state.

Grain storage bag 50 created by this lowered bag opening device M
The opening operation of the bag does not start immediately after the magnetic body 90 is attracted.
Since the CR timer 105 is activated at the same time as ON, it continues for the time _t1 shown in FIG. Since the suction time of the grains is increased and the suction of both is ensured, the grain storage bag can be reliably opened.

In addition, the permanent magnet 90 used in the above embodiment
may be replaced with an electromagnet.

[Full bag drawer N]

Referring to FIGS. 1 and 3, as described above, the guide rod 4 for suspending the grain storage bag 50
The cylindrical rod 4a and the rod rod 4b are slidably fitted together. A support rod 61 is erected at the front end of the floor 60 with its lower end rotatably attached to a plate spring 62, and the upper end of the support rod 61 supports the end of the rod 4b. A frame 63 is fixed to the upper end of the support rod 61, and a retaining plate spring 64 provided inside the frame 63 removably grips the end of the rod 4b by its elastic force.

Reference numeral 97 is a cover that covers the upper surface of the floor 60 in the empty bag storage section J, and prevents the flexible portion of the lower part of the empty grain storage bag 50 from directly interfering with the upper surface of the floor 60 and damaging it. Further, 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 full bags on the front side, and to prevent them from shifting together.

A hydraulic cylinder 65 is installed on the frame 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 the operation of the hydraulic cylinder 65, the floor 60 located at the position indicated by the solid line in the figure moves forward together with the rod 4b of the guide rod 4 to the forward position (direction perpendicular to the direction of movement of the combine) indicated by the broken line. , and return to its original position. S9 and S10 are switches, respectively. Switch S9 is floor 6
When the piston rod 0 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. Further, the switch S10 closes the hydraulic oil switching valve for the hydraulic cylinder 65 when the floor 60 retreats and its rear end comes into contact with the switch S10, thereby stopping the piston rod 66 from retreating.

Because of the above-described configuration, in this device, when the grain storage bag 50 is full, the hydraulic cylinder 65 is activated.
can be activated to pull out a full bag forward, and while the full bag remains in the drawn state, the next empty bag is fed out below the discharge port 1c by the bag feeding device L, and immediately used for the next grain storage operation. can move. 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 moves a closed grain storage bag stored in an empty bag storage position to a delivery position below a hopper along a substantially horizontal empty bag transfer path. A bag dispensing device for dispensing a bag toward a target, a dispensing stop means for stopping the bag dispensing device at a dispensing position, and a bag opening device above the dispensing position, wherein magnetic material is provided on both sides of the grain storage bag. On the other hand, the bag opening device has a pair of magnets that move downward from a standby position above the upper edge of the grain storage bag to be fed out after the bag feeding device stops, and approach and attract the magnetic material on the grain storage bag side. a detecting means for detecting the downward attracting position of the magnetic body; an attracting maintaining means for stopping the magnet body and maintaining the attracted state of the magnetic body; Since the bag-opening delay activation means for later operating the magnet to open the bag is provided, the bag-opening device having the magnet has a standby position above the upper edge of the grain storage bag to be fed out according to the feeding position, and a waiting position above the upper edge of the grain storage bag to be fed out. By moving up and down to the lower position where the magnetic body of the grain storage bag comes close to attracting the magnetic body, and by moving downward after the bag feeding device stops, the grain storage bag in the empty bag storage position is transferred to the bag opening device. The empty bag can be fed out toward the feeding position along a substantially horizontal empty bag transfer path without being disturbed.

Moreover, the bag opening device includes a detection means for detecting the downward suction position of the magnet body, an attraction maintaining means for stopping the magnet body and maintaining the suction state of the magnet body, and a detection means for detecting the downward suction position by the detection means. By providing a bag-opening delay activation means for opening the bag after a predetermined period of time has elapsed, the magnet adsorbed to the magnetic material on the grain storage bag side can be activated to open the bag after a predetermined period of time has elapsed. The adsorption time between the magnetic body of the grain storage bag and the magnet body on the side of the bag opening device becomes longer, so that the two can be reliably attracted, and the grain storage bag can be reliably opened.

[Brief explanation of the drawing]

Fig. 1 is a side view of the main part of a combine equipped with the bag opening device of the present invention, Fig. 2 is a longitudinal sectional view of the hopper discharge section of the combine, Fig. 3 is a side view of the main part of the hopper discharge section, and Fig. 4 Figure A is a plan view of only the same main parts, Figure 4B is a front view showing only the frame and guide rail in Figure 4A, Figure 5 is a front view of the same main parts, and Figure 6 is the present invention. FIG. 7 is a side view of the bag opening device M, FIG. 8 is an enlarged view showing only the main parts of the bag opening device M, and FIG. 9 is a front view of the bag opening device M. is a view in the direction of the arrows in Fig. 8, Fig. 10 is a view in the direction of the arrows in Fig. 8, Fig. 11 is a perspective view of the cam portion of the device, and Fig. 12 is a front view of the grain storage bag used in the present invention. , FIG. 13 is a sectional view taken in the direction of the arrow in FIG. 12, and FIG.
15 is a perspective view showing another embodiment of the grain storage bag, FIG. 16 is an electric circuit diagram for operating the bag opening device, and FIGS. 17 and 18.
Each figure is an explanatory diagram of the output of the elements in the same electric circuit. 1...Hopper, 1c...Discharge port, 4...Guide rod, 6...Discharge tube, 50...Grain storage bag, 54
...Magnetic material, 24,80...Motor, 84...Moving plate, 86,87...Link, 90...Permanent magnet, 93...Guide plate, S4, S6, S7...Switch, L...Bag Feeding device, M... bag opening device.

Claims (1)

[Scope of utility model registration request] a bag feeding device that feeds out a closed grain storage bag stored in an empty bag storage position along a substantially horizontal empty bag transfer path toward a feeding position below a hopper;
A feed-out stop means for stopping the bag feed-out device at a feed-out position, and a bag-opening device provided above the feed-out position, wherein a magnetic body is attached to both sides of the grain storage bag, and a magnetic material is attached to the bag-opening device. is provided with a pair of magnets that move downward after the bag feeding device stops from a standby position above the upper edge of the grain storage bag to be fed out and approach and attract the magnetic body on the side of the grain storage bag,
a detecting means for detecting a downward attracting position of the magnetic body; an attraction maintaining means for stopping the magnetic body and maintaining the attracted state of the magnetic body; An automatic bag-opening device for a grain storage bag, which is provided with a bag-opening delay activation means that activates the bag-opening operation.