JPS6336723B2 - - Google Patents

Description

[Detailed Description of the Invention] The needle of a conventional agricultural tying machine has a hole through which the string is passed at its tip, and a guide groove for storing and guiding the string is provided on the outer periphery of the arcuate curved part, so that the needle has a simple structure. It is complicated and increases the manufacturing cost, and the operation of passing the string through the string passing hole is troublesome.Moreover, the string stretched between the holder of the tubercle and the string passing hole of the needle becomes an obstacle, resulting in the culm being tied together. could not be ejected to the needle side.

The present invention provides a needle for an agricultural tying device that does not require a string to be passed through the needle, does not require a string guide groove, and is capable of releasing the string from the needle and releasing the bundle toward the needle when releasing the bundle. The knot and the needle are arranged on one side of a path for supplying, tying and releasing the culms, the string supply port is arranged on the other side of the path, and the needle The present invention is characterized in that the distal end portion is opened toward the knot and is configured as a string receiving portion that engages and disengages the string supplied from the string supply port.

The embodiments shown in the drawings will be described below. Reference numeral 1 denotes a shelling device mounted on the machine base of a combine harvester, and a binding device 4 for binding waste straw discharged from the discharge section of a waste straw conveyor 2 is installed at the rear of the device. One side is formed into a grain culm bundling processing passage A that is continuous with a receiving part 5, a supply passage 6, a culm collection part 7, and a discharge passage 8 from the starting end. That is,
Both the knot part 4a and the needle part 4b of the binding device 4 are provided on one side of the grain culm binding processing passage A,
The frame 9 for attaching the binding device 4 to the threshing device 1 is made up of a pair of upper and lower parallel pipes 9c', 9c'' and a strut connecting their ear sides, as shown in FIGS. 1, 2, and 17. 9a and 9b, which are screwed onto the rear surface of the threshing device 1 by mounting seats 9d and 9d', and the upper part of one support 9a is bent rearward and upward to form the ear receiving part 12, and the other support 9b Bearing 1
3 is fixed, and the stock side of the upper pipe 9c' faces the other side of the grain culm bundling processing passage A, and the part facing the culm collection part is the partition part 11 between the supply passage 6 and the discharge passage 8.
The boss 15a of the guide 15 forming the other side of the supply path 6 has a ring-shaped string supply port 14 and a mounting portion 15b through which the other end of the U-bar 16, one end of which is fixed to the binding device 4, is inserted. It is slidably screwed onto the upper pipe 9c'.

In addition, the string inside the basket 17 is loosened by the string 1.
7', and is supplied to the binding device 4 via the string supply port 14.

Next, the transmission device will be explained. The input pulley 20, which is driven by an appropriate shaft of the combine main body, is fixed to a spline shaft 20a supported by the bearing 13 and constantly rotates. The spline shaft 20a is a cylinder shaft. Since it is spline fitted to 21, when the binding device 4 is moved and adjusted in the culm direction as described later, it expands and contracts while transmitting rotation.

In FIGS. 6 to 9, the transmission mechanism is housed in one transmission case 22 having a case cover 23, and the input shaft 24 is connected to the cylindrical shaft 21 by a pin 24', and the input shaft 24 is loosely fitted into the input shaft 24. The gear 25 is connected to the input shaft 2 via a torque limiter 24a, which will be described later.
4 and rotates together. However, Torque Mitter 24
If a is not used, the gear 25 is fixed to the input shaft 24.

A crankshaft 26 having a crank pin 26b and an arm cam 26a has a gear 2 which meshes with the gear 25 and has a tapered pawl 27a on the side surface.
7 is spline fitted, and a one-turn clutch boss 28 is rotatably fitted. The one-turn clutch boss 28 includes a cam plate 28a having a crescent-shaped convex portion 28b and a pin 28c at one end.
On the other side, a partially toothed gear 30 is spline-fitted with a loosely fitted clutch plate 29 sandwiched therebetween.
The clutch plate 29 is biased in the rotational direction (counterclockwise in FIG. 9) by a torsion spring 32 which is engaged with the clutch plate 29 and 30d.

A crank pin 31 has tapered portions 31a and 31b at both ends, and is loosely fitted into a hole 28a' formed in the cam plate 28a.
has a protrusion 29c, a tapered hole 29b into which the tapered portion 31b of the clutch pin 31 fits, and a recessed portion 29a in which the pin 28c engages to regulate the rotation angle of the clutch plate 29 relative to the cam plate 28a. As shown in FIG. 8C, the gear 30 is integrally provided with a flange-shaped cam 30a with a part (wide tooth 30b portion) cut out, and the teeth have five wide teeth 30b.
It is composed of three teeth and three narrow teeth 30c, and there are seven missing teeth.

The forward/reverse shaft 33 has one end that meshes with the wide teeth 30b and narrow teeth 30c of the partially toothed gear 30, and has tapered holes 34a, 34b, 34c, 34 spaced at 90° intervals.
d has a bored intermediate gear 34 (24 teeth), and a swing link 35 is loosely fitted on the other side,
The swing link 35 has tapered portions 36a on both sides,
A hole 35' that slidably holds a crank pin 36 having a diameter 36b, and a projection 29c that pivotally supports a roller 37 that slides on the cam plate 28a.
a mounting seat 35d having a protrusion 35a that engages with the mounting seat 35d;
The stopper cam 38 is provided with a boss portion 35c in which the stopper cam 38 is rotatably fitted.
are a tapered hole 38b provided in a portion corresponding to the hole 35' of the swing link 35, and the mounting seat 35d.
a recess 38a into which the cam plate 28a fits, and two protrusions 38 that can abut the arcuate portion of the protrusion 28b of the cam plate 28a.
d, 38e, and this stopper cam 3
8 is biased by a torsion spring 39 whose both ends are engaged with the small holes 38c and 35b so that the tapered hole 38b is displaced relative to the clutch pin 36, as shown in FIG. 8A.

Further, the intermediate gear 34 has a gear 4 of a multi-use shaft 40.
1 are in mesh with each other, and a needle 42 and a door 49, which will be described later, are attached to the multi-use shaft 40, and the multi-use shaft 40 serves both as a door shaft and a needle shaft.

Γ node drive mechanism The drive gear 50 consists of 10 teeth in this example,
These teeth are designed to mesh only with the wide tooth 30b of the partially toothed gear 30, and the two teeth, which are out of phase by 180 degrees, have approximately half of the tooth width removed to form the partially toothed tooth 5.
0a, 50a', the drive gear 50 rotates 180 degrees, and when the cam 30a of the partially toothed gear 30 enters the cutout part of the partially cutout tooth 50a or 50b, the long teeth 50 in front and behind it rotate.
b, 50b' are locked by sliding on the outer periphery of the cam 30a, and when the cam 30a passes through the cutout, the cutout tooth 50a meshes with the wide tooth 30b and is driven. At the same time as the last wide tooth 30b passes the long tooth 50b, the cam 30a enters the cutout tooth 50a', and the drive gear 50 rotates 1/2 and is locked again.

In other words, the toothless gear 30 has 15 teeth, including seven toothless parts, and the drive gear 50 is halved by five wide teeth 30b...30b.
The partially toothed gear 30, which is the output gear of the one-turn clutch, rotates and is accelerated by the succeeding gear.
During the 5/15th rotation, the bill and holder make one rotation to perform the knotting action.

Further, the drive gear 50 integrally includes a bevel gear 51 having 18 teeth and is rotatably supported by a shaft 52, and the shaft 52 has a small diameter portion 52a at one end and a pin 52c at the other end. A mounting seat 52b screwed onto the transmission case 22 with a mounting bolt is fixed, and the distal end 53a of the anti-reverse claw 53 set on the pin 52c is in pressure contact with the circumferential surface of the cam plate 28a, and the base end The portion is pulled by a tension spring 54 whose one end is locked to the transmission case 22, and the back surface is in contact with an end 55a of a mounting bolt 55.

However, when the protrusion 35a engages with the 29c and acts as a stopper, the anti-reverse claw 53 engages the end 5 of the mounting bolt 55, as shown in FIGS. 7 and 8A.
It is far from 5a.

The speed increasing gear 60 (16 teeth) includes a bevel gear 61 that meshes with the bevel gear 51, and is rotatably supported by a shaft 62, with one end of the shaft 62 connected to the transmission case 22.
The other end is supported by inserting the small diameter portion 52a of the shaft 52 into the hole 62a.

The three-point meshing gear 70 (the number of teeth has no meaning, but it is set to 26) always meshes with the speed increasing gear 60, the holder gear 80 (12 teeth), and the building gear 90 (12 teeth). It is supported by a shaft 71 as shown in FIG.
The shaft 71 is fixed to the transmission case 22 with a nut 72, and a bill pressing plate 73 is attached to the outer end of the shaft 71.

Further, the holder gear 80 is attached to a holder shaft 81 that transmits rotation but slides in the axial direction, and the holder shaft 81 is supported by the transmission case 22 via a bush 85 and is also inserted into the cam metal 82. Only the holder 84 fixed to the outer end of the holder 84 protrudes outside the case, and the holder spring 83 and the holder gear 80 are housed inside the transmission case 22. Further, since a holder spring 83 is interposed between the holder gear 80 and a spring receiver 86 adjusted by a nut 88, the tapered surface of the holder 84 is pressed against the tapered surface of the cam metal 82, and the tapered surface 87 for holding the string is pressed against the tapered surface of the cam metal 82. The outer end surface of the spring receiver 86 is formed into a hexagonal pyramid-shaped tapered groove, and when the hexagonal nut 88 is turned to adjust the strap clamping pressure, the nut 88 releases the spring every 1/6 rotation. This matches the tapered groove of the receiver 86, and the holder spring 83 constantly presses the spring receiver 86, thereby preventing the nut 88 from returning.

The building 91 itself is exactly the same as the conventional one, but the shaft hole of the building gear 90 is oval-shaped with two parallel surfaces, and the gear bearing portion of the building shaft 91a has the width of the two parallel surfaces as described above. It is formed into an oval shape that is slightly narrower than the shaft hole. In other words, a certain lattice is formed between the bill gear 90 and the bill shaft 91a.

Further, as shown in FIGS. 4 and 6, the building pressing plate 73 is pressed against the building 91 by being pulled by a tension spring 92 whose tension can be adjusted by a nut 93, thereby applying a string clamping pressure to the building 91. Since a braking force is applied to the building 91, the building 91 rotates by the above-mentioned amount in a state deviated in the opposite driving direction as shown by the chain line in Fig. Although it rotates up to the position by the amount of play due to the fitting of the gear 90 and the bill shaft 91a without depending on the rotation of the bill gear 90, it returns to the original state A by the spring 92 and the pressing plate 73 at the same time as the knot is removed.

The knot guide 94 has its base fixed to the transmission case 22, and as shown in FIGS. 3 and 5, the knot guide 94 is a grain culm binding processing passage in which the receiving portion 5, the supply path 6, the culm collecting portion 7, etc. are connected in series. Forming one side of A and building 9
The lower end of the string guide groove 94c, which is provided diagonally downward from the upper part of the end surface 94d of the nodule guide 94, is a dead end, and the entrance part is for the needle to pass through. Part 94a
Furthermore, one side edge serves as a string guide surface 94b.

Γ Packer and star wheel drive mechanism In FIGS. 6 and 14, the packer shaft 10
A pin 10 is attached to an arm 100a protruding from the end of the
0b is fixed, and this pin 100b is connected to the crankshaft 2.
Since the arm 100a is connected by a rod 101 to a pin 26b which rotates integrally with the arm 100a, the packer 102 fixed to the other end swings, and its tip 102a moves in an arc between A and B.

Arm cam 26a that rotates together with the crankshaft 26
The cam link 110, which is in contact with the move.

Also, the bracket 1 that holds the transmission case 22
The intermediate shaft 11 is attached to the bearing pipe 112a provided in the bearing pipe 12.
3 is rotatably inserted through the intermediate shaft 113.
Pin 1 at the tip of arm 113a fixed at one end
13b is the pin 110a of the cam link 110;
Since they are connected by a link 110b, the intermediate shaft 113 reciprocates within a certain angle, and an arm 113c having a pin 113d at its tip is fixed to the other end of the intermediate shaft 113, as shown in FIG. There is.

The star wheel 114 has a support pin 112c attached to the upper part of the arm 112b which is installed upright on the bearing pipe 112a.
The star wheel 1 is rotatably supported by
A pin 115a at the other end of the link 115, one end of which is rotatably supported by the boss portion 114a of the arm 114, is connected to the pin 113d of the arm 113c by a rod 116.
is linked to. Further, a torsion spring 117 is interposed between the arms 112b and 113c so that the cam link 110 is constantly pressed against the arm 26a, and the link 115 is urged to be pulled down.
A stopper pin 119 held by the boss portion of the link 115 is brought into pressure contact with the star foil 114 via a spring 118 as shown in FIG.
The stopper pin 1 is inserted into an inclined groove 114b which is formed on the plate surface of the plate 114 and is gradually shallower on the rear end side in the direction of rotation.
A one-way rotating clutch is formed by press-fitting the head of the arm 113, and when the pin 113d at the tip of the arm 113c rises from E to F in FIG.
4 by 1/3 turn, and then the pin 113d is
When descending from to E, the stopper 120', whose base is pivoted to the arm 112b and is biased by the torsion spring 117a, receives the tip of the scraping protrusion of the star wheel 114 in a press-contact state.
The star wheel 114 does not rotate in the reverse direction, and the pin 119 of the one-way rotating clutch slips out of the inclined groove 114b and fits into the next inclined groove 114b, and eventually the star wheel 114 synchronizes with the packer 102 and rotates intermittently every 1/3 rotation. Driven.

Γ Needle and Door Drive Mechanism In FIGS. 3, 6, and 10, the boss 42a of the needle 42 is attached to the tip of the multi-purpose shaft 40 so as to rotate integrally, and the culm guides 43a, 43a' and the stopper arm 43a , 43b projecting from the boss 43
is loosely fitted to the multi-purpose shaft 40 so as to be freely rotatable. A torsion spring 44 is set between the small hole 42c of the boss 42a and the small hole 43d of the boss 43, and the stopper 42b protruding from the boss 42a of the needle 42 toward the base side is inserted between the culm guides 43a and 43a'. At this time, the needle 42 contacts the culm guide 43a' and maintains the posture shown by the solid line in FIG. At the same time, the needle 42 is configured to be able to rotate approximately 90 degrees from the position shown by the solid line to the position shown by the chain line in FIG. (It may be one or three) arcuate portion 4r,
42r', bundle release action parts 42s, 42s', string hooking recesses 42t, 42t', and one claw 42w are made long and curved to cover the other short claw to form a crab claw shape, and between the two. A string receiving part 42v formed in
42v', etc., and when viewed from above,
As shown in FIGS. 4 and 5, the string receiving portion 42v at the tip
is inclined so as to face the position of the needle passage part 94a of the nodule guide 94, and the culm guide 43
a, 43a' rotate along the end surface 94d of the knot guide 94.

Further, the door 49 has a hole in the middle part of the main part that fits into the stepped part of the boss 43, and L-shaped receiving parts are formed in one and the other of the main parts. Arc-shaped long holes 49a, 49 bored near both ends of the main part
The door 49 can be opened by screwing the bolt inserted through a' into the screw hole located in the middle of the stopper arm 43b.
is fixed to the stopper arm 43b, and by adjusting the mounting angle within the range of the elongated holes 49a and 49a', the width of the collecting culm 7 can be changed and the size of the bundle can be adjusted.

Γ Operation Timing The crankshaft 26 constantly rotates counterclockwise in FIG. 14, and the arm cam 26a rotates from the position shown by the solid line to the position shown by the two-dot chain line, thereby rotating the cam link 110 from C to D. Then turn star foil 114 1/3 turn. During this time, 10 police cars
The tip of 2 reaches point A from the position indicated by the solid line, returns to the position indicated by the solid line, and then descends along the side of the scraping protrusion of the star foil 114, and when rising, the cam link 110 touches the base arc-shaped part of the arm cam 26a. Since the star wheel 114 is in sliding contact with the star wheel 114, the star wheel 114 is not driven to rotate. In other words, the tip of the packer 102 passes between the front and rear grain culms partitioned by the raking protrusions of the star wheel 114 in any stroke of reciprocating rotation.
The grain culms to be supplied are clearly divided and neatly scraped onto the door 49, and the star foil 114 cooperates with the guide 15 to deliver them to the pack car 102 without leaving any grain deep inside the supply channel 6.

During such grain culm raking, while the concentrated grain culm on the door 49 does not reach a predetermined amount, the amount of descent of the cushion bar 46 which is pressed upward by the constant pressure spring 47 and supports the stopper 43c, that is, the constant pressure spring 4
Since the compression amount of 7 does not reach the predetermined amount, the one-turn clutch does not engage, and as shown in FIG.
9c is maintained in the engaged state, but the constant pressure spring 47
When the amount of compression reaches a predetermined amount and the multi-purpose shaft 40 rotates (rotates from point O to direction A in FIG. 8A), the swing link 35 rotates together with the intermediate gear 34 in the direction C. When moved (15 degrees in this example), the protrusion 35a
is removed from the protrusion 29c of the clutch plate 29.

At that time, the clutch plate 29 is attached to the torsion spring 3.
2 in the counterclockwise direction in FIG. 8, it rotates, and the tapered hole 29b pushes the clutch pin 31. Next, when the police car 102 moves backward, the door 49 and the needle 42 are pushed up by the constant pressure spring 47 and return to their original positions, and when the police car 102 descends to the position shown by the solid line in FIG. 27 taper claw 27
The timing is such that the clutch a contacts the clutch pin 31 and the one-turn clutch is engaged.

In this way, the one-turn clutch is engaged and the cam plate 28a is rotated a (15 degrees in this example) as shown in FIG.
While rotating, the circumferential surface of the cam plate 28a has an arc shape centered on the axis, so it does not push the roller 37, but after that the roller 37 is moved counterclockwise by the cam plate 28a to the position shown in FIG. 8C. During this time, the needle 42 passes through the back side of the wide part at the tip of the packer 102 and wraps the string around the straw bundle, as shown in FIG. 12-1. enter.

In this example, when the cam plate 28a rotates 80 degrees,
The drive gear 50 is activated by the wide teeth 30b of the partially toothed gear 30, and drives the bill 91 and the holder 84 at the same time.

At this time, the needle 42 is 5 degrees before completion of string winding (FIG. 8 c), the packer 102 is 21 degrees before the maximum compression, and after the cam plate 28a has rotated 85 degrees, the angle reaches 38 degrees, reaching 123 degrees. During this period, the guide surface of the cam plate 28a forms an arc centered on the axis, so the needle 42 is inserted the most and remains stationary until it reaches the position shown in Fig. 8 O, with the holder 84 being held tight and holding the string. , the packer 102 continues to compress, while the building 91 is driven approximately 63 degrees. That is, by compressing the grain culm with the packer 102 and stringing it, it is possible to bind it firmly.

Furthermore, even after the maximum compression point, the packer 102 is still being driven by the crank motion of the cam arm 26a and is near the bottom dead center, so the amount of return of the packer 102 is extremely small.

In other words, while maintaining the compressed state, Building 91
Since the string ends by rotating 130 degrees, it will not loosen and will be tightly tightened (see Figures 12A and 13B).

Then, when the stop period of the needle 42 ends, the needle 4 is rotated by the rotation of the cam plate 28a (after 120° rotation).
2 begins to return (Fig. 8 O), and at this time the cam plate 28
The protrusion 28b of a is the protrusion 3 of the stopper cam 38.
8d, the roller 37 starts to descend, so the relative positions of the teeth of the partially toothed gear 30 and the intermediate gear 34 are regulated so that the teeth can mesh smoothly without colliding with each other. Start (Fig. 8, O is just before engagement).

When the cam plate 28a rotates 130 degrees, the cam plate 2 is attached to the protrusion 38e of the stopper cam 38, as shown in FIG.
The convex portion 28b of 8a comes into contact with the stopper cam 38.
The narrow teeth 3 of the partially toothed gear 30 are prevented from rotating.
0c and the intermediate gear 34 are in mesh with each other, the torsion spring 39 is further twisted into the state shown in FIG. The end surface rides on the plate surface of the intermediate gear 34, and the other tapered portion 36b fits into the tapered hole 38b of the stopper cam 38, so that the intermediate gear 34 and the swing link 35 are mutually free (state (FIG. 8)).

At this time, the cam plate 28a has rotated 195 degrees, the needle 102 returns to the O point, and the intermediate gear 34
is driven by the partially toothed gear 30, so the needle 4
2 begins to release the bundled grain culm, which will be described later, from point O by the release action portion 42s' of the needle 42 located below, as shown in FIGS.

During that time, when the cam plate 28a rotates 165 degrees, that is, during the clutch switching action by the clutch pin 36, Bill 91 catches the string in its beak, and immediately after that, the knife of the holder 84 cuts the string, and the cam plate When the rotation angle of the cam plate 28a reaches 205 degrees, the bill 91 and the holder 84 rotate once, and the cut tooth 50a' is locked and stopped by the cam 30a of the cut gear 30, and the rotation angle of the cam plate 28a becomes approximately 212 degrees. Once inside and outside, knot removal is performed by pushing out the bundled grain culm by the discharge action section 42s' of the rear needle 42, and then, when the rotation angle of the cam plate 28a reaches 240 degrees, the star wheel 114 is activated.

The needle 42 continues to rotate further and stops when the rotation angle of the cam plate 28a reaches 345 degrees. At this time, the protrusion 35a of the swing link 35, which was rotating together with the intermediate gear 34, receives the protrusion 29c of the clutch plate 29 and rotates the clutch plate 29 in the opposite direction relative to the cam plate 28a, thereby shifting the tapered pawl 27a. The clutch pin 31, which has been subjected to a pressing force by the clutch plate 29, is fitted into the tapered hole 29b of the clutch plate 29, and the one-turn clutch is disengaged.

Next, the operation of each part will be explained in more detail.

Γ Strap clamping and cutting When the cam plate 28a rotates 165 degrees as shown in FIG.
At a rotation angle of 170°, the string that was inserted last time is in holder 8.
4 and the new string is held in the holder 84 and cut at the same time.

In the conventional method, at this point, the string could come off the second protrusion or the loop of the string wrapped around the building could come off the building, resulting in a knotting error, but in this example, the string guide groove 94c is connected to the building. Since it is a dead end at the part facing the shaft 91a and will never come off, the loop will not come off, and since both the building 91 and the holder 84 are rotating, the previously gripped string can easily come off. Not only does it cut twice so there is no string left behind, but the string is cut while being pulled, making the string cutting action extremely reliable.

Relationship between the return of the Γ needle 42 and the trouser car 102 Figures 8 (K) and 12 (C) show the needle 42 rotating toward the building 91 to wrap the string and then returning to the waiting position (the position shown by the solid line in Figure 3). ), which indicates the moment when the cam plate 28a passes through point O, which is
This indicates the point at which needle 4 has rotated 195°.
2 is further driven 180° together with the culm guide 43a, door 49, etc., and during this time, the door 49 and the release action portion 42s' of the needle 42 perform the knotting and release action.

Then, when the needle 42 returns to point O, the needle 42 is at a timing when it passes through the back of the packer 102 as shown from A to A in FIG. There is no disturbance of the culm at all.

Further, as shown in FIG. 11, the police car 102 returns to the position shown by the solid line in FIG. 14 until the star wheel 114 is activated, and from this point on, the rotation of the star wheel 114 begins as described above, so the return stroke is completed. Also in this case, the tip of the packer 102 wraps within the width of the raking protrusion of the star foil 114, so that even though the packer 102 reciprocates, it can accurately separate and rak the grain culms.

Γ Grain culm supply and bundle release Figure 8 C, Figure 13 O, Figure 12 C and 11
In the figure, when the rotation angle of the cam plate 28a reaches 205 degrees, the building 91 and the holder 84 stop, and the needle 4
The second discharge action part 42s' and the door 49 begin to push out the bundle, and the upper needle 42 and the culm guide 4
3a is withdrawn from the grain culm bundling processing passage A, and the culm collecting section 7 and the discharge path 8 communicate with each other, and the bundle is thrown out from the culm collecting section 7 as shown in FIG. For the first time, star wheel 114 is driven.

In other words, the one-turn clutch is driven and the cam 28
While a rotates 240 degrees, the star foil 114 holds the trailing grain culm, clearly separating the front and rear grain culms, and prevents the trailing grain culms from being carried out during release.

Further, the needle 42 separates the following grain culms as shown in Fig. 12D, but when the bundle is completely discharged from the machine as shown in Fig. 12E, it is time to open the supply channel 6. There is no need to worry about taking out the culm.

Stopping of the Γ needle and intermittent timing of one-turn clutch The needle 42 is connected to the wide tooth 3 at the end of the partially toothed gear 30.
When 0b finishes driving the intermediate gear 34, the cam plate 2
8a rotates 345° as mentioned above (15° before returning to point O)
At this time, the protrusion 35a of the swing link 35 comes into contact with the protrusion 29c of the clutch plate 29, so when the cam plate 28a rotates another 15 degrees with respect to the clutch plate 29, the clutch pin 31 enters the tapered hole 29b and completes one rotation of the clutch. can be cut.

In other words, when the clutch is engaged once, the cam plate 28a rotates 15 degrees after the clutch engages, and then the cam plate 28a rotates 15 degrees.
The needle 42 is actuated by the shape of the circumferential surface of 8a, and when the one-turn clutch is disengaged, the needle 42 stops and then the cam plate 28a rotates 15 degrees and then breaks. Therefore, when the one-turn clutch is engaged and engaged, there is no load, which is extremely The clutch can be engaged and engaged easily and accurately, is advantageous in terms of strength, and can be made lightweight and compact.

Γ Culm guide, door, and constant pressure spring Culm guides 43a, 43a' and door 49 are door 49
The stopper arm 43c is screwed onto the stopper arm 43b so that it is integrated with the stopper arm 43b.
Alternatively, the culm guide 43a or 43a' is supported by a cushion bar 46 which is supported by a constant pressure spring 47 via 43c'. This prevents the bundle from acting as resistance when acting.

In addition to operating the one-turn clutch, the door 49 also has the function of holding the bundle against packer pressure via a constant pressure spring 47 to improve the tightness of the bundle. 42
The collecting culm 7 is held while returning to point O shown by the solid line after stringing, but when releasing the bundle after that, the first
Needle 42 and door 4 as shown in Figure 2 C, A, and C.
9 rotate together to open the discharge path 8.

Immediately before the needle 42 rotates 180 degrees from point O and stops, the stopper 43c or 43c' rides on the head while tilting the cushion bar 46 and stops.

Furthermore, when the needle 42 operates to hook the string and stops, its inertial force is absorbed by the constant pressure spring 47, so even if the string is lost or broken and the pulling resistance disappears, resulting in a dry firing state. There is no overshooting of the needle 42, no impact, no noise, and the structure is safe in terms of strength.

Drive and connection of the Γ building and holder The building 91 and the holder 84 are the three-point meshing gear 70
simultaneously driven by.

Conventionally, the holder is driven after the building placed in the position shown in Fig. 13G begins to rotate, and even after the building stops, only the holder rotates and stops at the position shown, and the bundle release direction is as above. In order to remove the joints, which are facing downwards in the figure, the bill must be in the direction shown, so close the bill with the string that was first secured by the holder and the string that was later supplied by the needle. In order to grab the building, it has to be done just before the building stops, which causes the string to remain behind, which reduces the ability to hold the string thereafter, and furthermore, when the building grabs the string, the string that is locked to the second protrusion x comes off. As shown in Fig. 15, loops were pulled out resulting in three knots, one-sided knots, or complete knots.

However, the structure shown in FIG.
The needle 42 releases the bundle in the direction in which the needle 42 hooks the string and retreats, as shown in FIG.
In other words, since the knot removal direction is the needle retraction direction and the upper string guide groove 94c is a dead end, the knot guide 94c can be moved as shown in FIG.
By diagonally crossing the string guide groove 94c of No. 4, it becomes possible to open and stop the string guide groove 94c facing the direction in which the needle 42 enters. 91
The cord can be inserted into the opening securely without getting caught on the tip of the cord, and the cord gripping position can be moved forward from the knot removal position (Fig. 13).
As c), since the string that is firmly locked in the dead end part of the string guide groove 94c is pinched, the string can be reliably removed during the process from E to E, and there is no chance of making a mistake in grasping the string. .

In addition, since a play is provided between the bill 91 and the bill shaft 91a as described above during pruning, the bundle is attached to the discharge action portion 42s' of the needle 42 acting as a discharge arm and the door 49. When the building 91 is pushed out, it rotates from the position shown by the chain line to the position shown by the solid line in FIG. , so return to the position shown by the chain line.

Supplying a string to the Γ needle This needle 42 does not have a so-called string passage hole as in the conventional case, and the string receiving portion 42v at the tip is opened in the shape of a crab claw or 10 arms as described above. When the bundle is released, it separates from the string.

Therefore, the annular string supply port 1 is used to supply the string to the needle 42 rising from the lower side when releasing the bundle, and to receive the grain culm supplied after the release with the string.
4 on the opposite side of the shaft portion of the needle 42 and the passage as described above, and on the string receiving portion 42v of the needle 42.
The needle 42 is attached to the boss 15a of the guide 15 so as to diagonally cross the rotation locus (FIG. 12, F), and the needle 42 located at the bottom is directed toward the standby position (the upper position shown by the solid line in FIG. 3). While the needle is rotating, it guides the string that is strung diagonally across the surface shown by the chain line in the needle arc portion 42r' in Fig. 12C, and finally enters the string receiving portion 42v' and enters the state shown in Fig. 12C. Become.

When the needle 42 is used to wind the string, the needle 42 moves the string pulled out from the string supply port 14 to the building 91 and the holder 84 as shown in FIG.
Because it guides you to pull it away to the opposite side,
The string on the string supply port 14 side never gets caught on the building 91 or the like, and one long claw forming the string receiving part 42v is bent to cover the tip of the short claw, so the needle 42 Since the string receiving part 42v passes through the back of the packer 102, when the string is hung, the grain culms will not enter the string receiving part 42v and cause a bundling error.

Furthermore, since there is no need to pass the string through the needle's string passage hole as in the conventional case, the string can be easily attached.

The Γ torque limiter gear 25 is rotatable on the input shaft 24 and has a passive tapered pawl 25a on one side, and the drive boss 120 is slidably spline-fitted on the input shaft 24 and is connected to the gear 25. Drive taper claw 12
0a, and a conical hole 120d on the other side,
There are two stopper grooves 120b and 120c on the outer periphery.
is provided. The retainer 121 holds balls 121' in three holding holes 121a, respectively, and includes a stopper groove 121c facing the stopper groove 120b and a protrusion 121b that fits into the stopper groove 120c.

The brake ring 122 that is loosely fitted onto the input shaft 24 is connected to the stopper groove 12 of the retainer 121 on one side.
1c and the stopper groove 120b of the drive boss 120
The protrusion 122a and the conical hole 122b that fit into the...
and a boss-shaped thrust receiving portion 12 provided on the other side.
2d has a spring set groove 122c, one of which is received by a thrust receiving portion 122d, and the other is received by a washer 124.
The brake ring is received by a retaining ring 125 and is in sliding contact with a thrust bearing surface 24c provided on the input shaft 24, and a torsion spring 126 is set in the spring set groove 24d of the input shaft 24 and the spring set groove 122c. 122 in the rotational direction of the input shaft 24, and a thrust receiving protrusion 24b protruding from the middle portion of the input shaft 24 is in contact with a bearing held by the case cover 23.

FIG. 16c shows the transmission state,
The input shaft 24 and gear 25 rotate integrally.

That is, the brake ring 122 is connected to the torsion spring 126.
The retainer 121 is pushed in the direction of arrow B by
is moved to the right with respect to the drive boss 120, and the balls 121' are brought out from the conical holes 120d and 122b, so that the drive tapered claw 12 of the drive boss 120
0a engages with the passive tapered pawl 25a of the gear 25 to transmit power.

At this time, a thrust is generated in the drive boss 120 and the gear 25 due to the engagement of the tapered claws 25a and 120a, but the drive boss 120 is driven by the ball 121',
The gear 25 is received by the thrust receiving surface 24c via the brake ring 122 and the ball 123, and the gear 25 is received by the bearing via the thrust receiving protrusion 24b, thereby maintaining the transmission state.

The inner end of the brake pin 127 (see FIGS. 1 and 16a), which is slidably held in the transmission case 22, faces the circumferential surface of the brake ring 122 with a slight gap, and the outer end The end is in contact with a fixing plate 128, which will be described later, and when an overload is applied, the transmission case 22 tilts toward the shelling device 1 as shown in FIG. 1', and the brake pin 127 receives pressure from the fixing plate 128. Then, the brake pin 127 presses the outer peripheral surface of the brake ring 122 to apply a braking action.

At this time, since the torsion spring 126 has a weak force sufficient to maintain the state shown in FIG. 16c, the brake ring 122 immediately acts due to the above-mentioned braking action (balls 123 and 121' both have rolling resistance) as shown in FIG. 16d. Torsion spring 126 to the position shown in
Each protrusion 1 rotates relative to the direction of rotation against the
21b and 122d are respective stopper grooves 12.
The conical holes 120d and 122b are opposed to each other by contacting the rear end surfaces of the balls 1
21' enters the conical holes 120d and 122b, so the drive boss 120 moves back and power transmission is cut off.

The trich limiter configured in this manner has the strength of the torsion spring corresponding to the play in the rotational direction between the driving taper pawl 120a and the passive taper pawl 25a and the relative inertial force of the brake ring 122, retainer 121, ball 121', etc. with respect to the rotational speed. By selecting the torque limiter, it is possible to prevent the drive taper claw 120a and the passive taper claw 25a from engaging again by the force of the torsion spring once the transmission is cut off.This embodiment uses an externally actuated torque limiter. and fixing plate 1 on frame 9.
28 are set together, and the entire transmission case 22 is rotatably attached to the frame 9, and a spring is interposed between the transmission case 22 and the frame 9, and adjustment is made to overcome the appropriate rotational reaction force of the input shaft 24. The structure is such that the power is cut off when an excessive load is applied to the binding device 4 simply by keeping the binding device 4 in place.

In other words, the reliability as a torque limiter can be further improved, and once the power is cut off, the rotation of the input shaft 24 is reduced and the torsion spring 12 is
If you make it easier to operate the torque limiter 6 or stop its rotation with another clutch, etc., the torque limiter will return to the transmission state again, so it will not wear out and make a continuous impact sound after cutting like the conventional one. It is possible to eliminate damage.

Mounting part of the Γ bundling device As mentioned above, the frame 9 has the upper and lower pipes 9c′,
9c'', pillars 9a, 9b, etc., and the lower pipe 9c'' is integrally protruded with a base 10a having a long hole 10d, and a mounting portion 10 consisting of a pair of supporting metals 10b, 10b', etc. , said bracket 1
Reference numeral 12 includes a window 112e through which the pressing part 128c at the upper part of the fixed plate 128 faces, a mounting hole 112d for screwing the transmission case 22, and a pair of support holes 112f and 112f' drilled at the lower part of both sides. .

Further, the fixing plate 128 has a pipe 128a having a set hole 128b on the lower surface of the intermediate bend, and a nut 128d and a pipe 128a are provided in the horizontal part of the pipe 128a.
28e are welded, a hole 128f is bored in the middle of them, and the transmission case 22 is attached to the bracket 112.
After screwing the fixing plate 128 onto the base 10,
a, and the pipe 128a is placed on the support hole 112f,
112f', and their support holes 112f,
The pin 10c is inserted into the support metal 10b, 10b' and the set hole 128b of the pipe 128a to support it rotatably, and the threaded handle 129
is inserted into the long hole 10d from below as shown in FIG. 3, and screwed into the nut 128d and tightened.

As shown in FIGS. 3 and 5, the fixing plate 1 is fixed to the transmission case 22 through an L-shaped bracket 45.
The bolt 130 is inserted downward into the hole 128f of 28, and the compression spring 131 is set with the double nut 132. In this state, the input shaft 24 is rotating counterclockwise as shown in FIG. By doing this, the maximum torque can be set.

That is, when the entire binding device 4 overcomes the compression spring 131 and rotates counterclockwise, and the pressing portion 128c of the fixed plate 128 presses the brake ring 122 via the brake pin 127 to apply braking, it functions as the torque limiter described above. to do.

In addition, a nut 128e welded to the fixing plate 128
A bolt 133 is screwed in, a part of the bracket 45 is received by the bolt 133, the gap between the brake pin 127 and the brake ring 122 is adjusted, and the bolt 133 is fixed with a lock nut 134.
The torque limiter can be activated by a minute rotation of the binding device 4 due to overload.

Selection of Γ binding position When the above-mentioned binding device 4 is used to bind waste straw of a combine harvester, it is necessary to adjust the binding position depending on the culm length of the waste straw or the purpose of use of the waste straw.

In such a case, loosen the threaded handle 129, adjust the binding device 4 by moving it left and right along the long hole 10d, and tighten the threaded handle 129 at the desired position to bind the waste straw at any position. be able to.

In this case, there is no need to adjust the torque limiter.
Further, the boss portion 15a of the guide 15 is movably fitted into the upper pipe 9c' of the frame 9, and is connected to the case cover 23 which is integrated with the transmission case 22 by the U bar 16. The string supply port 14 protruding from the boss portion 15a can be connected to the tying device 4 without changing its relative position to the tying device 4.
Moves according to the movement adjustment of.

In the above embodiment, the needle 42 or the door 49 was used as the ejection means, but a separate ejection arm may be provided instead. However, as described above, if the needle 42 or the door 49 is also used as the ejection arm, the configuration can be significantly simplified.

Further, although conventionally a needle shaft and a door shaft were required separately, the transmission mechanism can be downsized by having only the multi-use shaft 40 perform these functions.

Next, an example of a reaping and binding machine in which the above-mentioned binding device 4 is attached to a reaping machine will be explained with reference to FIGS. Machine frame 1
A reaping frame 143 is attached to the front part of the reaping frame 42, and a pair of left and right weeding bodies 144, 144, grain culm pulling frames 145, 145, and a cutting blade 146 are attached to the reaping frame 143, as in the conventional one. The rear ends of the guide rods 147, 147 protruding from the back surfaces of the grain culm lifting frames 145, 145 face above the intermediate portion of the cutting blade 146.

And a deck plate 148 at the rear of the cutting blade 146
On the right side, the above-mentioned binding device 4 has the collecting culm 7 facing forward, the bundler 102 facing left, and the needle 4.
2 and the door 49 are on the right side, and the guide rod 102a is connected to the tip of the police car 102.
While the packer 102 is raking the grain culms into the culm collecting section 7, the grain culms being fed from the reaping section are blocked.

In addition, a basket 149 for storing string balls is provided in the rear space of the grain culm lifting frame 145 on the right side.
The pulled out string passes through a string slack remover 151 protruding from a frame 150 provided on the back of the grain culm pulling body 145 on the right side, and then passes through the string supply port 14 attached to the frame 150, which is connected to the above-mentioned As in the embodiment, it is supplied to the holder via the needle 42.

Furthermore, the bundling device 4 itself has exactly the same configuration as the above-mentioned example, and the cut grain culms are attached to the guide rod 147,
147 into the supply path 6, the packer 102 scrapes it, and when it reaches a predetermined amount, it is bundled and released.

As shown in FIG. 19, the conventional bundling device has a lateral grain culm supply concentrating and discharging passage, with the packer and needle part provided separately at the rear thereof, and the nodule discharging part provided separately in front of said passage. Not only are transmission cases required before and after each of the above-mentioned passages, but the lower parts of the transmission cases are connected by chain cases in the front and rear directions, which naturally increases the size and cost of the entire binding device. In particular, because it was located at the front of the aircraft on one side, the front-to-back and left-right balance of the aircraft was extremely poor, and maneuverability was extremely poor not only on unicycles but also on two-wheeled vehicles.

Moreover, since the upper surface of the chain case must be used as a collecting section, if this was set at approximately the same height as the cutting blade, the chain case would often protrude downward and collide with an obstacle.

In this respect, the present bundling device can be installed at the rear of the grain culm supply convergence passageway, that is, near the center in the longitudinal direction of the machine body, and the front surface of the transmission case 22 is used as the culm collection part 7, and its size is the same as that of the conventional one. Since it requires less than half the weight, the balance of the machine body is extremely good in both the front, rear, left, and right directions, and the binding device 4 does not protrude downward, eliminating all the drawbacks of the conventional device.

As described above, the present invention includes a nodule and a needle,
The grain culm is provided on one side of a path through which grain culms are fed, bound and discharged, and a string supply port is provided on the other side of the path, and the tip of the needle is opened toward the nodule part and the string supply port is opened. Since the tying device is configured as a string receiving portion that engages and detaches from the supplied string, the tying device can be made smaller and lighter and can be obtained at a lower cost.Moreover, the needle is stretched between the knot portion and the string supply port. Since the string is attached to and detached from the needle, there is no need to thread the string like in the conventional method.Furthermore, when the needle is retracted, the string is not attached to the needle, so the bundle tied at the collecting part can be easily removed. can be released without being disturbed by the strings that are ready to receive the supplied grain culm.

[Brief explanation of the drawing]

The drawings show an example of an embodiment, and
Figure 1 is a side view of the binding machine attached to the combine harvester.
Figure 1' is a partially cutaway side view of the same as the above, Figure 2 is a rear view of the same as the above, Figure 3 is a side view of the binding machine, Figure 4 is a plan view of the same as the above, Figure 5 is a rear view of the same as the above, Figure 6 is an exploded cross-sectional view of the transmission part, Figure 7 is a right side view with the case cover removed, Figure 8 is a drawing showing the operating sequence of the transmission part, Figure 9 is an exploded perspective view of the transmission part, and Figure 10 is the needle. and an exploded perspective view of the door, Figure 11' is a side view of the one-turn clutch and interlocking mechanism, Figure 11 is a timing diagram of the same as above, Figure 12 A to A are side views showing the bundle release operation, and A' is a side view of the needle. Fig. 12-1 A and B are action diagrams of the needle and puller, C is a view from arrow A in A. In the figure, E is a cross-sectional view of C, O is a view of A in direction of arrow A, F is a view of O in direction of B, K is a view of 13-1A is a perspective view of FIG. 13A, FIG. 13A is a perspective view of FIG. 13A, FIG. 14 is a right side view, and FIG. 15-1 a, b and 15-2 a, b are knot action diagrams of the conventional example, FIG. 16 a is a sectional view of the torque limiter, b is an exploded perspective view of the same as above,
c and d are sectional views of the main parts, Fig. 17 is an exploded perspective view of the frame, Fig. 18 a is a plan view of an example in which the binding machine is attached to a reaper, b is a perspective view of the same as above, and Fig. 19 a is the conventional one. A plan view of the example, and b is a perspective view of the same. 6... Supply path, 7... Culm collection, 8... Discharge path,
9... Frame, 14... Strap supply port, 26... Crankshaft, 30... Intermittent gear, 31, 36... Crank pin, 40... Multi-use shaft, 42... Needle, 47... Constant pressure spring, 70... Three-point mesh gear,
84... Holder, 94... Nodule guide, 100
...Patzker axis, 102...Patzker, 114...
...Star foil, 120...Drive boss, 122...
...Brake ring, 127...Brake pin, 1
28... Fixed plate.

Claims (1)

[Claims] 1. A nodule and a needle are arranged on one side of a path through which grain culms are supplied, bound and discharged, a string supply port is arranged on the other side of the path, and the tip of the needle is directed toward the nodule. 1. An agricultural binding device characterized in that it is configured as a string receiving part that is opened to engage and detach from a string supplied from a string supply port.