JP2000316360A - Feed chain structure of thresher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thresher feed chain structure which can prevent a feed chain from hanging down, when the feed chain is switched from a carrying posture into a maintenance posture, and thereby enables an efficient and easy maintenance work. SOLUTION: This feed chain structure is obtained by supporting a nipping rail 3a on the side of an upper plate frame 23 along a threshing port 21 with support member 60, 61, supporting on the side of a lower side wall la a thresher chain guide 30 in which a feed chain 3 for nipping and carrying grain straws is disposed, with the support member 60, 61, supporting the feed chain 3 in a state capable of being inclined toward the side by the utilization of the lower rotation support points of the support members 60, 61, disposing the feed chain 3 in a state capable of being switched from a carrying posture that the feed chain 3 stands on the side of the threshing chamber 2 into a maintenance posture that the carrying side of the feed chain 3 is rotated and inclined toward the side, and further disposing a chain receiver 9 for controlling the hanging of the feed chain 3 loosed with a chain-extending mechanism 7 in the maintenance posture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a feed chain drive structure for a threshing machine.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Utility Model Publication No. Sho 62-28840, a threshing machine mounted on a harvester such as a combine harvester performs maintenance work such as removal of clogging of transported grain culm and cleaning and repair of a handling room. By rotating the feed chain sideways.

[0003]

However, in the threshing machine having the structure disclosed in the above-mentioned publication, the feed chain is simply rotated laterally around a support shaft provided at a distance below the feed chain. Due to the structure, the rotation radius of the feed chain becomes large, so that the amount of projection to the machine side becomes large, so that the distance between the worker and the part to be worked becomes large, so that there is a disadvantage that it is difficult to perform maintenance work. .

Further, when the feed chain is rotated again to return to the transport position, the alignment of the drive sprocket and the drive shaft of the feed chain becomes complicated. A special joint structure or the like is required, and there are problems such as a complicated structure and high cost.

[0005]

In order to achieve the above object, a feed chain structure of a threshing machine according to the present invention is provided with a holding rail 3a on a side of a top plate frame 23 along a handle 21 of a handling chamber 2 and a holding rail 3a. In a threshing machine in which a feed chain 3 is provided on the lower side wall 1a side to pinch and transport a grain stem, the feed chain 3 is supported by a chain guide 30 so as to rotate, and a support member 6 in which the chain guide 30 is disposed forward and backward.
0, 61, and these support members 60, 6
1, a rotation fulcrum is provided below the feed chain 3 to support the feed chain 3 so that the feed chain 3 can be tilted to the side. And a chain receiver 9 for restricting the hanging of the feed chain 3 relaxed by the chain tensioning mechanism 7 in the maintenance posture is provided. .

A chain receiver 9 is arranged below the chain plate 3e of the feed chain 3, and the feed chain 3 and the chain receiver 9 are tilted and rotated while being pulled out to the side. It is characterized by having been configured to be able to. Further, a chain tension mechanism 7 for adjusting the tension of the feed chain 3 is integrally formed on the feed chain 3 side.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a threshing machine which can be mounted on a combine or a harvester, etc., which rotatably supports a handling cylinder 20 (FIG. 2) from the front side of the fuselage and drives the feed chain 3 along a handling port 21. A handling room 2 provided, a fourth opening 4 formed in a funnel shape connected to the culm opening of the handling room 2,
A fan case 5 of a dust removal fan that integrally connects to the side wall 1a of the gate 4 and protrudes toward the side and that discharges dust is integrally formed.

A receiving network 22 of the handling room 2 is provided inside the airframe.
The threshing materials and the like that have leaked from the water are subjected to threshing and sorting by a swinging sorting body 87 and a sorting air path (FIG. 1, FIG. 1).
2). This threshing machine 1 can open and close the top plate frame 23 forming the upper wall of the handling room 2 with the hinge mounting portion 23a provided on the back side (counter handle side) as a fulcrum as shown in FIG. It is provided in. Then, the lower lip plate 25 forming the lower plate of the handle 21 is
It is provided so as to be able to be connected to and separated from the receiving net 22 via a connecting portion 26 which can be engaged and disengaged, and is connected to a later-described chain guide 30 via a connecting portion 25a.
The opening and closing of the handling room 2 is wide open by cooperating with the switching operation of the maintenance posture of the above, so that maintenance work such as removal of clogging of grain stalks and threshing materials, and repair and cleaning of the inside can be performed easily and easily. I can do it.

The feed chain 3 can easily switch its posture from "conveyance posture: closed state" shown by a solid line in FIGS. 1, 2 and 5 to "maintenance posture: open state" shown by a dotted line. The switching support structure 6 is formed and supported on the side wall (lower side wall) 1a, and the holding rail 3a opposed to the transfer surface (transfer side) formed above the top plate frame is connected to the top plate frame. It is supported by a rail base 3b fixed to the body 23 side in a suspended state via a plurality of elastic mechanisms 3c (FIG. 2). Forming a road. Then, the grain culm sent through a pre-processing unit (not shown) is conveyed from the front to the rear while being pinched between the feed chain 3 and the pinching rail 3a, and threshing by the handling drum 20 can be performed favorably. Like that.

The feed chain 3 supports floating sprockets 31 and 32 before and after a "f-shaped" chain guide 30 provided along the back side of the conveying surface to support the rear side, and a floating floating sprocket 32 at the rear. Is wound around a driving sprocket 33 located below the lower side, and the non-conveying side (lower side) is pressed by a tension roller 70 supported via a chain tensioning mechanism 7 so as to be able to be driven smoothly.

The drive sprocket 33 is mounted in a space 1c (FIGS. 2 and 4) which is recessed and formed in plan view by the rear wall 1b, the side wall 1a and the side surface of the fan case 5 in the handling room 2. The drive case 8 installed so as not to protrude greatly from the machine side by the structure ensures that the feed chain 3 is driven with a compact transmission structure, and that the feed chain 3 is switched to the maintenance posture.
The operation can be easily performed without being disturbed by the drive case 8.

Next, the “switching support structure 6” of the feed chain 3 will be described with reference to FIGS. The switching support structure 6 includes support members 60 and 61 formed of “U-shaped” rods having different widths of inward side sides in a side view, which are vertically provided with the width of the handling chamber 2 before and after the chain guide 30. Is formed by the short rod portion 6a, the vertical rod portion 6b, and the long rod portion 6c (FIG. 5, FIG.
6), brackets 10 protruding on both sides of the side wall 2 (FIG. 1)
The long rod portion 6c is slidably fitted and supported in a vertical pipe (slide tube) 63 of a support tube (switching support portion) 62 mounted on the shaft.

The slide cylinder 63 has a horizontal pipe (rotating cylinder) 66 rotatably fitted to a support shaft (fulcrum shaft) 65 passing through the bracket 10 below the bracket 10 so as to intersect at right angles. By integrally providing the switching support portion 62 in a cross shape in plan view, the posture of the feed chain 3 can be switched and supported stably with a compact configuration.

The slide cylinder 63 is provided with a spring ball type temporary holding stopper 63a shown in FIG. 6B, and the ball 63b is engaged with the first locking hole 61a opened in the support members 60 and 61. At this time, the feed chain 3 is maintained in the stopped position in the transport position, and when the feed chain 3 is engaged with the second locking hole 61b, the feed chain 3 can be temporarily supported in the drawn position shown by the chain line in FIG. ing.

The support members 60 and 61 are provided with a flange-like stopper 6d at the inner end of the long rod portion 6c so as to be detachable, and set a maximum pull-out position for stopping the feed chain 3 at an appropriate position. Then, the stopper 6d and the side wall 1
is connected by a spring (restriction means) 6e so that the tilt of the feed chain 3 is restricted when the feed chain 3 is being pulled out, and the feed chain 3 is rotated unexpectedly at an inappropriate position. This prevents problems such as collisions with other places.

At the proper rotation position, the stopper reaction force of the stopper 63a (FIG. 6A) exceeds the return force of the spring 6e. Further, the restricting means is not limited to the above-described method, and a stopper guide for disabling rotation in the middle of drawing may be provided from the side wall 1a.

Since the support members 60 and 61 both support the chain guide 30 with the U-shaped short rod portion 6a, it is possible to stably support the feed chain 3 at a position close to the handle 21. it can. And the long rod portion 6c is used as the handle 21
Can be inserted into and supported by the support cylinder 62 in a state of being inserted into a space formed widely below the feed chain 3, so that the “conveying posture” and the “pull-out pivoting operation” of the feed chain 3 can be smoothly performed. The switching support structure 6 can be formed compactly on the side of the handling room 2.

The vertical rods 6b (FIG. 5) connecting the short rods 6a and the long rods 6c in the vertical direction are arranged vertically on both sides of the handling room 2. Therefore, each support member 60, 61
Of the feed chain 3 by securely gripping the vertical rod portion 6b with both hands.
There is also an advantage that it is possible to efficiently perform the pulling out and the tilting rotation by a simple operation.

As shown in FIG. 1, the supporting members 60 and 61 have a horizontal shaft 6 for connecting them to the middle of the vertical rod portion 6b.
f, a stay 6g is rotatably supported on both sides of the horizontal shaft 6f, and the stay 6g can be engaged and disengaged with an appropriate hook (fixing means) 6h made of a spring material provided on the vertical rod portion 6b. I support it.

According to the above configuration, when the feed chain 3 is transported, as shown by the solid line in FIG.
Is locked by the hook 6h, supported in parallel with the vertical rod 6b, and stored compactly.

When the feed chain 3 is pulled out to the maintenance position, the stay 6g is connected to the hook 6
When the feed chain 3 is tilted downward after being removed from the position h, the stay 6g assumes a hanging posture as shown by a chain line, and has an effect that the feed chain 3 can be easily and stably supported in the maintenance posture. be able to.

Next, the chain tensioning mechanism 7 of the feed chain 3 will be described with reference to FIG. This chain tension mechanism 7
The arm 72 having a tension roller 70 is pivotably supported on a support shaft 71 provided at the center of the chain guide 30 in a swingable manner, and is urged in a tensioning direction via a tension spring 73. It is possible to swing and switch to a non-toning posture shown by a chain line via 75.

With this configuration, when the feed chain 3 is switched from the transport position to the maintenance position, the tension roller 70 is switched to the non-tensioning position by the tension lever 75, and the feed chain 3 is largely slackened. Then, the feed chain 3 can be easily removed from the drive sprocket 33, and the feed chain 3 together with the chain guide 30 and the chain tensioning mechanism 7 is quickly pulled out toward the outside of the machine body as it is, and the maintenance posture is changed as described above. Can be transferred to

When returning to the transporting posture after the maintenance work is completed, the feed chain 3 can be accurately positioned at the meshing position with the driving sprocket 33 by rotating upward and pushing back.
By operating the tension lever 75 in this state to return the tension roller 70, there is an advantage that the feed chain 3 can be simply brought into the transporting posture again.

The feed chain 3 is provided with a driving sprocket 33 at the lowermost portion on the non-transport side thereof so that the lower lip plate 25
(FIG. 5) It is located in the space recessed and formed inward downward, and the support shaft 65 serving as the rotation fulcrum of the feed chain 3 is provided as close as possible to the drive sprocket 33. (FIG. 4).

With this configuration, it is possible to smoothly rotate the feed chain 3 to the maintenance posture without greatly projecting the feed chain 3 outward and without bringing the lowermost portion of the feed chain 3 into contact with the side wall 1a or the like. The maintenance work can be performed without being interrupted by the feed chain 3. When returning from the maintenance position to the transport position, the detached feed chain 3 is not largely separated from the drive sprocket 33, so that the chain work on the drive sprocket 33 becomes easy.

The feed chain 3 is located near the chain roller 3f between the chain plates 3a, 3a on both sides in the portion wound around the driving sprocket 33, and the rotating cylinder 66 on the support member 61 side. (FIG. 6
A chain receiver 9 formed of a rod-shaped or plate-shaped body integrally extended from A) is provided. On the front support member 61 side, a chain run-out preventing body 90 for preventing the chain 3 from hanging down is provided so as to be slidable on the chain roller 3f, so that the feed chain 3 can be smoothly rotated in the transport posture. Further, it is possible to easily prevent the chain from coming off due to the looseness of the feed chain 3 in the maintenance posture with a simple configuration.

That is, when the feed chain 3 is loosened by the chain tensioning mechanism 7 as described above, the driving sprocket 3
Since the chain portion deviating from 3 is supported by the chain receiver 9 in the immediate vicinity of the driving sprocket 33 without being greatly lowered, the feed chain 3 can be easily pulled out.

Since it is supported in the vicinity of the support shaft 65 (FIG. 1), contact with other objects during rotation is prevented, and positioning on the driving sprocket 33 when returning to the transporting posture is easy.
There are advantages that the chain hanging operation can be performed accurately and efficiently. In this embodiment, the support shaft 65 forms a rotation fulcrum of a mechanism for pulling out the feed chain 3 sideways.

Next, the transmission and mounting structure of the driving sprocket 33 will be described with reference to FIGS. In the space 1c formed between the handling room 2 and the side wall 1a and the fan case 5 as described above, the drive case 8 is made substantially flush without protruding greatly from the side wall 1a of the handling room 2 to the outside. In this position, the rear wall 1b of the handling room 2 and the thick mounting plate 80 which bends and reinforces the fan case 5 are vertically and longitudinally connected as shown in FIG. 1 so as to improve the overall frame rigidity. I have.

The drive case 8 (FIG. 4) has a drive shaft 8a having a drive sprocket 33 and a large gear 81 on the upper part, an input pulley 82, and a small gear 8 meshed with the large gear 81.
3 is supported, and the input shaft 85 of the drive case 8 is stably fixed to the side surface of the drive case 8 and the mounting plate 80 by penetrating the mounting hole opened in the mounting plate 80, and the space. The input pulley 82 is disposed close to the side wall 1a by utilizing the space in the portion 1c (FIGS. 3, 4, and 7).

The input pulley 82 is transmitted via a belt from an appropriate output pulley located on the lower side, and the input pulley 82 in the illustrated example is swung by a swing drive cam 86 provided at its base. The moving sorter 87 can be smoothly driven by a simple configuration.

The threshing machine 1 configured as described above reduces the rotational power input from the input pulley 82 through the drive case 8 in the transport position of the feed chain 3 to rotate the drive sprocket 33 to rotate the feed chain. 3 is driven by an appropriate tension pressure by the chain tension mechanism 7,
After threshing is performed in the handling room 2 while conveying the grain culm fed between the holding rail 3a and the culm, the culm can be conveyed and discharged backward through the fourth port 4.

When the feed chain 3 or the maintenance work inside the machine is to be performed, the top plate frame 23 is first raised as shown in FIG. The rail 3a can be detached upward from the feed chain 3.

After that, the feed chain 3 is pulled out to the side of the machine body by the above-described operation, and is tilted and turned to be in a horizontal maintenance posture as shown by a dotted line in FIG. Lower lip board 25
Can also be removed, and the machine side and the side of the handling room 2 can be widely opened.

As described above, the pivot 6 of the feed chain 3
Since the feed chain 5 is provided near the lowermost position on the non-transport side, the feed chain 3 and the lower lip plate 25 can also be pulled out without greatly protruding outside the machine, and maintenance work can be easily performed. is there.

When the feed chain 3 rotates,
When it is not necessary to open the lower lip plate 25, if the engagement of the connector 25a is released, only the feed chain 3 side can be set to the maintenance posture.

When the maintenance work is completed, the feed chain 3 and the lower lip plate 25 are returned to the transport position by raising the support shaft 65 through the rotary cylinder 66 (FIG. 6A) and then pushing it back. It is possible to easily assemble the original conveying posture and to perform the threshing operation satisfactorily again.

In the threshing machine 1 capable of performing such an operation, the drive case 8 having the drive sprocket 33 of the feed chain 3 is provided in the space 1 c formed by recessing the handling chamber 2 and the fan case 5. It is installed without protruding greatly to the machine side. And drive case 8
Is attached to the outside of the mounting plate 80 connecting the handling room 2 and the fan case 5 and the input pulley 82 is arranged inside the mounting plate 80. Therefore, the frame rigidity of this portion protruding from the side wall 1a Can be sufficiently improved while adopting a simple structure, and the drive case 8 and the input pulley 82 can be attached and arranged compactly in the inside and outside of the attachment plate 80.

Further, the drag due to the input and output is reduced by the mounting plate 8.
There is an advantage in that the feed chain 3 is supported in a well-balanced manner, and both can be freely installed at a low desired position below the transport end of the feed chain 3 via the mounting plate 80, so that the feed chain 3 can be driven favorably. It has the feature of.

In the shell removing machine 1 capable of performing such an operation, the chain guide 30 for supporting the feed chain 3 is formed integrally with the chain tensioning mechanism 7 so that the chain guide 30 is formed. A simple structure can also be used as the mounting member of the chain tensioning mechanism 7, and
When the feed chain 3 is tilted to the side and rotated while receiving the feed chain 3 by the chain receiver 9 (FIG. 4) even when the feed chain 3 is loosened to the maintenance posture, it does not collide with the machine wall or the like. , Can be performed smoothly.

Further, the chain receiver 9 is provided with the driving sprocket 3
Since it is located between the chain plates 3a of the chain portion wound around the chain 3, the chain 3 detached from the driving sprocket 33 is properly supported, and the chain 3 is not detached from the chain receiver 9 and is moved from the transport position. It is possible to satisfactorily switch to the maintenance posture.

The feed chain 3 with respect to the driving sprocket 33 when changing from the maintenance position to the transfer position.
Chain 3 without significant displacement
There is an advantage that the rewinding can be easily performed.

[0045]

As is apparent from the above description, according to the feed chain structure of the threshing machine of the present invention, when the feed chain 3 is changed from the transport position to the maintenance position, the chain tensioning mechanism 7 is operated to feed. When the chain 3 is loosened and removed from the driving sprocket 33, the feed chain 3 in this portion hangs down. However, the chain receiving member 9 receives the chain without preventing the hanging down from increasing, so that the hanging portion is connected to the feed chain 3. The maintenance posture can be set without contacting the machine wall or the like at the time of turning.

Further, when changing from the maintenance position to the transfer position, the positioning with the driving sprocket 33 is easy, and chaining can be performed appropriately and promptly.

Further, since the chain receiver 9 is provided between the chain plates of the feed chain 3, even when the feed chain 3 is pulled out to the side, the feed chain 3 does not come off and can be moved to the side. This can be performed smoothly, and the tilting and rotation of the feed chain 3 can be performed smoothly without greatly projecting to the side.

Further, since the chain tensioning mechanism 7 is integrally provided on the feed chain 3 side, it is easy to switch the feed chain 3 to the maintenance posture and to return to the re-conveying posture after the maintenance work is completed. Can be done.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of a threshing machine provided with the present invention.

FIG. 2 is a front view of FIG.

3A is a side view showing a configuration of a space portion, FIG. 3B is a front view of FIG. 3A, and FIG. 3C is a plan view of FIG.

FIG. 4 is a sectional view showing a mounting structure of a drive case.

FIG. 5 is a rear view showing the maintenance posture of FIG. 1;

6A is a perspective view showing a configuration of a support member of a feed chain switching support structure, and FIG. 6B is a sectional view of a stopper.

FIG. 7 is a plan view of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 threshing machine 1a side wall (lower wall) 1b rear wall 1c space 2 handling room 3 feed chain 5 fan case 6 switching support structure 6a short rod 6b vertical rod 6c long rod 6e spring (regulating member) 8 drive case 9 Chain receiver 60, 61 Support member 62 Support cylinder 63 Slide cylinder 65 Support shaft (fulcrum shaft) 80 Mounting plate 82 Input pulley

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroyuki Fukuyori 667 Iya-cho, Oji, Higashiizumo-cho, Yatsuka-gun, Shimane 1 Mitsubishi Agricultural Machinery Co., Ltd.

Claims (3)

[Claims] 1. A top plate frame 23 along a handle 21 of a handle room 2.
In a threshing machine in which a holding rail 3a is provided on the side and a feed chain 3 is provided on the lower side wall 1a side to hold and transport the grain stalk, the feed chain 3 is supported by a chain guide 30 so as to rotate. Are supported by support members 60 and 61 disposed in front and rear, and a rotation fulcrum is provided below these support members 60 and 61 to support the feed chain 3 so that the feed chain 3 can be tilted laterally. It is provided so as to be switchable from the transport posture stood on the side of the handling room 2 to a maintenance posture in which the transport side is tilted and rotated toward the side, and further relaxed by the chain tensioning mechanism 7 in the maintenance posture. A feed chain structure of a threshing machine provided with a chain receiver 9 for restricting the feed chain 3 from hanging. 2. The chain plate 3e of the feed chain 3.
Between the feed chain 3 and the feed chain 3
2. The feed chain structure for a threshing machine according to claim 1, wherein the feed chain is tilted and rotated while the chain receiving member is pulled out to the side. 3. The feed chain structure of a shell removing machine according to claim 1, wherein a chain tension mechanism 7 for adjusting the tension of the feed chain 3 is integrally formed on the feed chain 3 side.