JPH0743517Y2 - Threshing and discharging straw carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a threshing and discharging straw conveyor device having a drive unit at the beginning side of the conveyor for receiving power transmission from, for example, a handling cylinder arranged in proximity. More specifically, a drive sprocket for arranging a discharge straw transport chain for transporting threshed culms on the transport start side, a tension ring on the transport end side, and a tension mechanism for biasing the tension ring. The present invention relates to a threshing and discharging straw conveying device configured by.

[Conventional technology]

In this type of threshing and discharging straw conveying device, conventionally, only a tension mechanism including an urging spring and a sliding rod for moving the tension wheel body in the tension direction by this spring has been provided (for example, the actual open sho 58 -189736).

[Problems to be solved by the device]

In this case, the structure of the chain can be coped with only by the flexibility of the tension mechanism.However, if the chain stretches beyond the flexibility of the tension mechanism due to the secular change due to long-term use, it should be in that state. If a lock phenomenon occurs due to the catching of the exhaust straw chain and the sandwiching rail, the drive sprocket will cause a "tooth jump" phenomenon,
There is an inconvenience that the tooth itself causes abnormal wear.

An object of the present invention is to provide a chain that can cope with the elongation of the chain due to aging only by adding a simple mechanism.

[Means for Solving the Problems]

According to a characteristic configuration of the present invention, the tension mechanism is movable in the rod axial direction in a state in which the support rod having the tension wheel body attached to one end is set in a posture such that the other end faces the conveyance start end side. And a first urging means for urging the tension ring body to the tension side integrally with the support rod, is provided between the pedestal and the support rod. A tension mechanism is provided which acts on the support rod of the tension mechanism to restrain the tension wheel body from moving toward the starting end side beyond a certain amount and allows movement to the end side. A swing plate that is swingable around is provided so as to face the other end of the support rod in the axial direction, and the outer surface of the swing plate is brought into contact with the other end of the support rod to cause the tension. Limit of movement to the loose side of the wheel A receiving surface for defining a field is provided, and the receiving surface constitutes a plurality of steps of the check surface in which the limit point of movement of the tension wheel body toward the loose side sequentially changes to the tension side, and the adjacent check surfaces are provided. An intermediate passage surface located further on the tension side than the movement limit point by the plurality of steps of the restraining surfaces is formed between the two, and based on the extension of the tension length beyond the intermediate passage surface of the transport chain, The second urging means for urging the oscillating plate in an oscillating manner is provided so as to act the check surface having the movement limit point close to the tension side. The action and effect are as follows.

[Action]

Due to the characteristic structure, the drive sprocket adopts the "slack transfer" method at the start side of the transfer, so if the chain causes a dance phenomenon on the output side of the drive sprocket, the tension wheel restrains to absorb the slack of the chain. It acts to keep the tension applied to the chain constant by repeating the reciprocating movement away from the surface. Then, when the chain drive load increases, the movement of the tension sprocket toward the starting end side is restricted by the check surface of the check mechanism having the characteristic configuration. Therefore, the tension of the chain is increased, and the "tooth jump" phenomenon of the drive sprocket can be suppressed.

For example, as shown in FIG. 1, when the chain (14) stretches greatly while the drive operation is being performed corresponding to the check surface (19A) that forms a small movement limit point, the tension wheel body follows the extension. The check mechanism (1) is urged by the second urging means (downward weight in the drawing) as the sprocket moves away from the drive sprocket (9).
As shown in FIG. 3, 9) regulates the movement of the tension wheel body (12) to the drive sprocket (9) side by a certain amount or more through the intermediate passage surface (19c) and the next check surface (19B). Automatically switch accordingly. Therefore, in the same way as the fine reciprocating movement of the tension wheel body (12) in the transport direction corresponding to the check surface (19A) with a small movement limit point, it corresponds to the check surface (19B) with a slightly larger movement limit point. Tension wheel (1
A fine reciprocating movement in the conveyance direction of 2) is performed. Here, when the discharge straw is caught, the tension wheel body (12) is largely moved to the starting end side, and the movement is restricted by the check surface (19A).

At this time, since the movement limit point is larger than the movement limit point before switching, it is possible to set the movement limit point corresponding to the elongation of the chain, and even if the chain extends, "tooth jumping" of the drive sprocket The phenomenon can be suppressed.

In addition, because of the characteristic configuration, the other end of the support rod (16) comes into contact with the restraining surfaces (19A) and (19B) from the axial direction side, so that the waste straw is caught as described above. In this case, the support rod (16) directed to the drive sprocket (9) side can be reliably received by the check surfaces (19A) and (19B), and as a result, the support rod (16) can check the check surface (19A), It is possible to prevent problems such as coming off (19B).

Moreover, because of the characteristic construction, the second biasing means is provided as a dedicated biasing means for biasing the restraint mechanism, and therefore, for example, as shown in Japanese Utility Model Publication No. 52-44975, it is separate from the restraint mechanism. As compared with the case where the restraint mechanism is biased by the component force of the biasing force of the biasing means for biasing the mechanism, the biasing force can be reliably applied to the restraint mechanism, and the restraint surface (19
It is possible to smoothly switch between A) and (19B), and it is possible to avoid complication of the structure.

[Effect of device]

As described above, by adopting the restraint mechanism provided with a plurality of restraint surfaces, the "tooth skipping" phenomenon of the drive sprocket and the like can be suppressed while the structure is simplified, and the tooth wear and the like caused by it can be suppressed.

However, if you consider only the measures against chain elongation, a ratchet with multiple check surfaces is sufficient, but in this case, the check surface is switched at the limit position where chain elongation occurs. Therefore, in the switched state, the tension wheel cannot be practically moved to the drive sprocket side, and an excessive tension force acts on the chain due to clogging or the like. Since the restraint surface is set closer to the starting end side than the start end side, there is a movement allowance of tension at least for the distance between the intermediate passage surface and the restraint surface, which is advantageous in adjusting the tension force.

〔Example〕

The threshing-discharging and discharging straw conveying device used by being mounted on the combine will be described.

As shown in FIG. 1 and FIG. 4, the threshing-discharging-discharging straw-conveying device conveys with the stock-source clamping and conveying device (2) that clamps and conveys the stock-source-side portion of the discharge straw and the tip side. It is composed of an ear tip locking and conveying device (3), receives the waste straws conveyed by the threshing feed chain (4) and treated by the handling cylinder (5), and conveys them backward. A binding device, a dropper device, a discharge straw cutter device, or the like is appropriately arranged behind the discharge straw conveying device (1).

The threshing-discharging-discharging and conveying device (1) is attached to the input bevel case (6) attached to the machine frame near the threshing feed chain (4), and the conveying end is attached to the input bevel case (6) and is extended toward the conveying end. The terminal end of the support frame (7) is attached to the machine body frame. The input bevel case (6) pivotally supports an input pulley (8) that receives power from a handling cylinder (5) and a drive sprocket (9) of the stock holding device (2), and has both sprockets inside. A bevel gear transmission mechanism (10) for supplying power to (8) and (9) is incorporated.

A tension mechanism (11) and a roller-type tension wheel (12) are provided on the conveyance end side of the support frame (7), and a guide sprocket (13) pivotally supported on the front side of the tension mechanism (11). ) And both sprockets (9),
A chain (14) with a transport protrusion is installed across (12). This transport chain (14) rotates vertically
It acts from above on the discharge straw conveyed on the threshing feed chain (4), and the discharge straw is sandwiched and conveyed by the sandwiching rail (26) located below, and the support frame (on the return path above). It is supported and moves while straddling the upper end of 7).

Next, the tension mechanism (11) will be described in detail. As shown in FIG. 1, pedestals (15) and (15) having a channel shape in a side view are arranged on both lateral sides of the support frame (7) and the pedestals (15) and (15) are arranged. Sliding rod (16),
(16) (an example of a support rod) is supported, and both sliding rods (16) and (16) are urged toward the end of conveyance by springs (17) and (17) (an example of a first urging means). In addition, the tension ring (12) is attached to the tip of the sliding rods (16) and (16).
The mounting bracket (18) is fixed. Therefore, the tension wheel body (12) is biased toward the chain tension side by the springs (17), (17). On the other hand, a vertical rocking plate (19) is mounted on the side of the sliding rods (16), (16) opposite to the mounting end of the tension wheel body (12). Two steps of check surfaces (19A) and (19B) are formed on the outer surface side.
A) and (19B) come into contact with one ends of the sliding rods (16) and (16) to form a limit point of movement of the tension sprocket (12) toward the loose side. Then, as shown in FIG. 3, the lower sides of the two check faces (19A) and (19B) are such that the lower limit of movement of the movement limit point and the lower limit of movement of the drive sprocket (9), The distance from the center of rotation (X) of the vertical swing plate (19) is reduced. Moreover, both check surfaces (19
An intermediate passage surface (19c) having a distance from the center of rotation (X) larger than the distance between the check surfaces (19A) and (19B) is formed between A) and (19B). Therefore,
As shown in FIG. 1, when the chain (14) stretches while the lower check surface (19A) side is operating, the sliding rod (16) is pushed to the end of the conveyance, Second from the figure
As shown in the figure, the vertical rocking plate (19) rotates downward by its own weight as the second biasing means so that the upper restraining surface (19B) acts. As a result, an appropriate restraining effect can be exerted when the chain (14) is extended.

Above, the vertical swing plate (19) having the restraining surfaces (19A) and (19B) is referred to as a restraining mechanism.

In the figure, (20) and (21) are a detection plate and a sensor for detecting jamming during transportation, which outputs a signal for activating a clutch or the like to stop the transportation by the sensing operation of this sensor, Reference numeral 22) is a guide for guiding the chain (14) on the return route side. Further, the tip locking transfer device (3) is supported by the transmission bevel case (6) and the support frame (7), receives power from the guide sprocket (13) shaft, and holds the stock holding device ( It is driven synchronously with 2).

As shown in FIG. 4, a cover (24) is provided at a position corresponding to the end surface of the discharge straw conveying device (1) on the same side as the grain storage hopper (23) of the combine, and when using the binding device. , The cover (24) is opened as shown in FIG. 5 (b) in order to avoid interference with the tip side portion of the discharged straw sent by the discharged straw conveying device (1). Since the structure of 24) uses the leaf spring (25) inside, it is easy to handle. In other words, the leaf spring (25) maintains the posture of the cover (24) in both the closed state (a) and the open / closed state (b), so it is necessary to use a complicated structure such as a toggle spring. Absent.

[Other Embodiments] As the mechanism for urging the oscillating plate, the weight of the vertical oscillating body is used in the embodiment, but a dedicated urging mechanism may be provided.

In the discharged straw conveying device (1), the upper path may be the conveying surface.

The tension wheel body (12) may be a sprocket.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a threshing and discharging straw conveying device according to the present invention, FIG. 1 is a side view showing a stock holding device of a discharging straw conveying device, FIG. 2 is a side view showing a tension mechanism, and FIG.
The figure is a side view showing the restraint mechanism, and Fig. 4 is an overall plan view.
Figures (a) and (b) are vertical rear views of the cover. (9) ...... Drive sprocket, (11) ...... Tension mechanism, (12) ...... Tension wheel, (14) ...... Transport chain, (15) ...... Cradle, (16) ...... Support rod, ( 17) ...
… First biasing means, (19) …… Swing plate, (19A), (19B)
…… Checking surface, (19c) …… Intermediate passage surface.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Sadanori Hita 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd. Sakai Works (56) References: 52-44975 (JP, U) Actual: 52 -71679 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A drive sprocket (9) for arranging a discharge straw conveyor chain (14) for conveying threshed culms and a tension wheel (12) for arranging it on the conveyor end side.
And a tension mechanism (11) for biasing the tension wheel body (12), wherein the tension mechanism (11) has the tension wheel body (11) at one end. The support rod (16) to which 12) is attached is movably supported in the rod axial direction on the receiving base (15) in a state in which the other end portion is oriented so as to face the conveyance start end side. A first urging means (17) for urging the tension wheel body (12) toward the tension side is provided integrally with the support rod (16) between the pedestal (15) and the support rod (16). And a restraining mechanism that acts on the support rod (16) of the tension mechanism (11) to restrain the tension wheel body (12) from moving beyond a certain amount toward the starting end side and allow movement toward the ending end side. In order to configure this check mechanism, a swing plate (which can swing around the horizontal axis is 19) is provided so as to face the other end of the support rod (16) in the axial direction, and the outer surface of the swing plate (19) is
A receiving surface for contacting the other end of the support rod (16) to define the limit of movement of the tension wheel body (12) to the loose side is provided, and the tension wheel body (12) is provided by this receiving surface.
Is composed of a plurality of check surfaces (19A) and (19B) whose movement limit points to the loose side sequentially change to the tension side, and between the adjacent check surfaces (19A) and (19B), An intermediate passage surface (19c) located further on the tension side than the movement limit point by the check surfaces (19A) and (19B) of these stages is formed, and the intermediate passage surface (19) of the transport chain (14) is formed.
a second urging means for urging the oscillating plate (19) so as to act the check surface (19B) whose movement limit point is close to the tension side based on the extension of the tension length exceeding c). A threshing and discharging straw conveyor device that is provided.