JPH10146124A - Stem culm raising apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stem culm raising apparatus capable of improving durability even in overloading on an endless rotary chain and being hardly stuck with dust, etc. SOLUTION: This stem culm raising apparatus comprises an endless rotary chain 9 equipped with raising tines 10 at fixed intervals hung between an upper driving sprocket 8 and a floating roller body 7 in a positioned fixed state at the lower side and a tension controlling means T for regulating the tension of the endless rotary chain 9 by a mechanism for supporting the driving sprocket 8 so as to vertically adjust its position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stem and stem raising apparatus for cutting stem and stems in a field such as a combine or a binder.

[0002]

2. Description of the Related Art Conventionally, in this type of stem / culm raising apparatus, as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-182421, an endless rotating chain provided with raising claws at predetermined intervals. Is wound around the idler wheel which is fixedly arranged at the lower end portion in the raising case, and the idler sprocket and the driving sprocket which are arranged at the upper side portion in the raising case. The endless rotating chain is mounted on a free end of an arm rotatably supported on the case by a free sprocket, and the free sprocket is elastically urged upward by a spring to lift the arm upward. I was trying to stretch.

[0003]

However, in the conventional stem and stem raising apparatus, the idle sprocket and the driving sprocket are arranged in a narrow space in the upper part of the raising case, and both of them are endless. Since the rotating chain is wound around the belt, the belt wrapping angle with respect to the driving sprocket is in a small range of about 90 degrees. If the endless rotating chain is overloaded, the chain temporarily comes off the driving sprocket. And the sprocket teeth are likely to be deformed or broken. Also, 2
When the two sprockets are raised and arranged on the upper part of the case, there is a problem that dust or the like brought into the case by the raised claws adheres to the location where the sprocket is arranged and tends to accumulate.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and provides a sprout raising apparatus which increases the durability of a sprocket even when an overload is applied to an endless rotating chain and which is difficult to adhere to dust and the like. For the purpose of providing.

[0005]

[Means for Solving the Problems]

(Structure) The stem / pull raising device according to claim 1 of the present invention comprises an endless rotating chain provided with raising claws at predetermined intervals, and a driving sprocket having an upper arm and a lower arm having a fixed lower arm. A mechanism for winding around the idler wheel body and supporting the drive sprocket so that the vertical position of the drive sprocket can be adjusted, wherein tension adjusting means for adjusting the tension of the endless rotating chain is configured.

(Operation) According to the first aspect of the present invention, since the endless rotation chain is simply wound around the driving sprocket and the idler, the endless rotation of the driving sprocket is achieved. Because the chain wrap range is a large angle range of about 180 degrees,
The number of teeth acting on the drive sprocket from the endless rotating chain increases, so that the force can be dispersed, and the stress from the endless rotating chain acting on each tooth of the drive sprocket can be reduced as compared with the conventional case. Then, the drive sprocket can be vertically changed in position and adjusted so that the endless rotating chain can be tensioned with a predetermined tension. In addition, the endless rotation chain is stretched linearly along the drive sprocket having a relatively large diameter and the idler wheel body in the perspective direction, that is, along the vertical direction.

(Effects) Therefore, according to the structure of the first aspect of the present invention, it is possible to wind the endless rotating chain by using the drive sprocket having a relatively large diameter, and the winding angle range is limited. Since it is as large as about 180 degrees, even when a temporary overload is applied to the endless rotating chain, it is possible to suppress the occurrence of problems such as jumping of the chain or deformation of the teeth of the driving sprocket. It has become something. In addition, since a single driving sprocket is disposed in the upper part of the raising case, dust is less likely to adhere around the driving sprocket, and maintenance work such as dust removal is simplified. . Further, since only a single drive sprocket is provided on the upper side of the raising case, there is also an advantage that the left and right widths of the upper side of the raising device can be made compact. Since the position of the driving sprocket can be adjusted so as to move on a straight line along the vertical direction, there is an advantage that the adjustment range can be extended and the adjustment amount for adjusting the tension of the endless rotating chain can be increased. In addition, the raising case can be set only to the left and right widths where a single drive sprocket can be arranged, so that the left and right widths of the raising case can be set narrower than before, thereby widening the stem and stem introduction path. It is also possible to set it, and it is possible to make it easy to satisfactorily raise the culm of the lodging stem especially when cutting the head.

(Structure) According to a second aspect of the present invention, there is provided the stem and stem raising apparatus according to the first aspect, further comprising a bevel gear case that supports the driving sprocket and transmits rotational power to the driving sprocket. In a state in which rotation around the vertical axis is restricted, the tension adjusting means is fitted to a transmission case above the bevel gear case so as to be position-adjustable in the up-down direction. .

(Operation) According to the structure of the second aspect of the present invention, the vertical position of the drive sprocket is not adjusted directly, but the vertical position of the bevel gear case for transmitting to the drive sprocket can be adjusted. Therefore, the transmission to the drive sprocket can be performed well without using a universal joint or the like irrespective of the vertical position change adjustment. Further, since the vertical position of the bevel gear case is adjusted while being fitted to the upper transmission case, the transmission case guides the vertical position change of the bevel gear case.

(Effects) Therefore, according to the structure of the second aspect of the present invention, the vertical position of the driving sprocket can be adjusted by using the bevel gear case located outside the raising case. Therefore, the vertical position change adjustment can be done externally and it is easy to do, and there is no need to provide a structure to adjust the drive sprocket vertically in the upper space inside the raising case, and the upper space location has a simple structure, It has advantages such as easier maintenance.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 shows the self-removable combine harvesting pre-processing device 1. This pre-cutting device 1
A plurality of stalk culm raising devices 3 for arranging a plurality of weeding tools 2 side by side and raising planted stems and culms in a field sown by the weeding tools 2.
Are arranged side by side on the left and right, and are equipped with a cutting device 4 for cutting the root of the raised stem and stem, a vertical conveying device 5 for conveying the cut stem and stem to a rear threshing device (not shown), and the like. doing.

As shown in FIGS. 1 and 2, each stem / pull raising device 3 includes an idler wheel 7 pivotally attached to a lower end of a raising case 6 and an upper portion of the raising case 6. An endless rotating chain 9 is wound around the driving sprocket 8 provided, and raising nails 10 for raising stems and stems are pivotally attached to the endless rotating chain 9 at predetermined intervals, and the raising nails are formed. A guide 11 for raising the claw 10 on the path of movement upward by raising the idler 10 with respect to the endless rotating chain 9 by the idler wheel 7;
The lowering path of the endless rotation chain 9 is raised as the arm moves, and the claw 10 is made to fall down.

As shown in FIGS. 2 and 4, each raising case 6 has a lower portion connected to a supporting main frame 12 which is also used as a transmission case of the pre-cutting device 1. For fixing to the component support frame 13 by a coupling tool, and for transmitting power to each raising case 6 from a horizontal transmission case 15 extending laterally from a rising transmission case 14 raised from the support main frame 12. Via the transmission case 16 and the bevel gear case 17,
The upper part of each raising case 6 is supported.

The drive sprocket 8 is driven by transmission from a lateral transmission case 15 via a transmission case 16 and a bevel gear case 17. In detail, FIG.
As shown in FIG. 3 to FIG. 3, a drive shaft 18 that rotates integrally with the drive sprocket 8 extends rearward through a long hole 19 that is long above and below the rear surface of the case 6, and the drive shaft 18 is a bevel gear. The output shaft of the case 17 is formed. The bevel gear transmission mechanism 20 is installed in the bevel gear case 17 in a state in which the transmission direction is changed to substantially 90 degrees. The outer case is vertically slidably fitted to the transmission case 16 extending to the outside. A vertical transmission shaft 22 branched by a bevel gear mechanism 21 is inserted into a transmission case 16 through a horizontal transmission shaft 30 in the horizontal transmission case 15, and the vertical transmission shaft 22 is connected to an input transmission in the bevel gear case 17. The shaft 23 is spline-fitted so that it can slide up and down and transmit torque. In the upper portion of the upwardly-facing cylindrical portion 17A of the bevel gear case 17, slits 24 extending in the vertical direction are formed at equal intervals in three places around the outer periphery in a predetermined range in the vertical direction from the upper edge. At the same time, guide pins 25 engaged with the respective slits 24 are protruded outward from the outer peripheral portion of the lower end of the transmission case 16. Then, as shown in FIG. 1, the compression coil spring 26 whose lower part is regulated by each guide pin 25 is connected to the upward cylindrical portion 17A of the bevel gear case 17.
Is provided so as to surround the compression coil spring 26.
The upper position of the upper end is restricted by a ring-shaped stopper 28 whose upper position is restricted by a stopper 27 fitted in an outer peripheral groove 17a near the upper end of the upward cylindrical portion 17A.
In addition, the outer peripheral groove 17a is formed at three places in the vertical direction, so that the restriction position of the ring-shaped stopper 28 can be changed in the vertical direction. Here, the compression coil spring 26, the guide pins 25, the slits 24, etc. constitute a tension adjusting means T for elastically urging the drive sprocket 8 upward and thus tensioning the endless rotating chain 9.

With the above configuration, the compression coil spring 2
6, the bevel gear case 17 is elastically urged upward with respect to the transmission case 16 by the elastic urging force.
The integral drive sprocket 8 is elastically urged upward through the bevel gear case 17 and the drive shaft 18, and the endless rotating chain 9 is stretched. Further, since the guide pin 25 is restricted from being displaced around the vertical axis by the narrow slit 24, the transmission case 16
In contrast, the rotation of the bevel gear case 17 around the vertical axis is prohibited. Even when the endless rotating chain 9 is stretched by use, the restriction position of the ring-shaped stopper 17 is simply set to a position lower than the original position, and the urging force of the compression coil spring 26 causes The upper part can be pulled up to maintain a predetermined tension.

[Another Embodiment] The position of the tension may be simply adjusted without using an elastic urging means such as a spring. In the above embodiment, the configuration in which the tension can be adjusted by changing the driving sprocket up and down together with the bevel gear case for transmission to the driving sprocket has been described. You may comprise so that change is possible.
In this case, the transmission to the driving sprocket is made possible by using a universal joint or the like so that the transmission to the driving sprocket can be performed regardless of the vertical position of the driving sprocket.

[Brief description of the drawings]

FIG. 1 is a partially expanded longitudinal side view showing a transmission structure to a raising device.

FIG. 2 is a rear view showing the raising device and the transmission structure.

FIG. 3 is a cross-sectional plan view showing a transmission case and the like.

FIG. 4 is a side view showing the front of the combine.

[Explanation of symbols]

 7 Idler wheel 8 Drive sprocket 9 Endless rotating chain 10 Raising claw 16 Transmission case 17 Bevel gear case T Tension adjusting means

Claims (2)

[Claims] An endless rotating chain provided with raising pawls at predetermined intervals is wound around a drive sprocket having an upper arm and an idler wheel having a lower arm fixed in position. A stem and stem raising device comprising tension adjusting means for adjusting the tension of the endless rotating chain by a mechanism for supporting the endlessly adjustable upper and lower positions. 2. A bevel gear case that supports the driving sprocket and transmits rotational power to the driving sprocket is vertically moved to a transmission case above the bevel gear case in a state of restricting rotation about a vertical axis. The stem and stem raising apparatus according to claim 1, wherein the tension adjusting means is configured to be fitted so as to be adjustable in a direction.