JPS605793Y2 - Chain tension structure of stem culm transport device - Google Patents

Description

[Detailed Description of the Invention] The present invention involves fitting a mounting member with a tension wheel attached to the supporting member in a slidable manner, and providing a spring that biases the mounting member to apply a constant tension to the chain. The stem culm conveying device is configured to give a constant force to the spring, and is configured to maintain a constant tension change caused by loosening of the chain by adjusting the biasing force of the spring using an adjusting device consisting of a screw shaft and a nut. Regarding chain tension structure.

The chain tensioning structure of the stem culm conveying device as described above is shown in Japanese Utility Model Publication No. 17141/1983.

However, with this structure, the spring that biases the mounting member to which the tensioning ring is attached is exposed, so the stem culm etc. may get caught and the tension may change, and it may come into contact with other objects such as stones. The disadvantage is that if you hit it, you will be damaged.

Therefore, with this structure, it is conceivable to cover the entire adjustment device consisting of the mounting member to which the tensioning wheel is attached, the spring, and the screw shaft and nut that adjust the biasing force of the spring, but it is possible to cover the entire adjustment device with a cover. If the biasing force of the spring is adjusted by loosening the spring, the cover must be removed one by one, making the adjustment cumbersome.

Therefore, it is conceivable to provide a two-part telescopic cover that covers the spring between the mounting member to which the tension wheel is attached and the screw shaft of the adjuster that adjusts the biasing force of the spring. In addition, there is a problem that the assembly becomes troublesome.

It is an object of the present invention to provide a cover with a simple structure and to easily adjust the biasing force.

The characteristic structure of the present invention taken to achieve the above object is that the screw shaft of the adjusting tool is connected and fixed to the mounting member, and
The screw shaft is fitted into a pair of brackets attached to a support member so as to be retractable and retractable, and the spring is externally fitted to the screw shaft portion between the pair of brackets, and the upper parts of the pair of brackets are connected to each other by a plate. The nut of the adjustment tool is screwed onto the threaded shaft portion between the tensioning wheel side bracket and the tensioning wheel, and the nut and the spring are connected with each other. A collar is fitted onto the helical shaft portion between the two, which passes through the bracket on the side of the tension wheel and transmits the amount of operation of the nut to the spring, and this configuration provides the following effects.

That is, the screw shaft of the adjuster is integrally connected to the mounting member to which the tension wheel is attached, and the screw shaft is supported by a pair of brackets attached to the support member so as to be freely retractable. Therefore, a spring that biases the screw shaft can be provided between the brackets, and a cover can be provided between the brackets so as to cover the upper part of the spring interposed between the brackets, so that a simple cover can be provided. The structure made it possible to cover the spring.

Moreover, since the spring is covered with a cover in this way, the nut for adjusting the biasing force is placed outside the cover and the operating force is transmitted through the collar, so the adjustment of the biasing force is not covered by the cover. It can now be easily done from outside.

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 shows a combine harvester in which a reaping pre-processing section 4 is connected to the front part of the machine, which consists of a crawler traveling device 1, a threshing device 2, etc., via an elevating frame 3 which also serves as a transmission case.

FIG. 2 shows the pre-harvesting treatment section 4, in which a pair of left and right lifting devices 5a and 5b installed obliquely at the front section pull up two planted stem culms into an upright position. While the culm is held and conveyed backward by a pair of left and right conveyor belts 6at6b, the base end of the plant is cut by a clipper type cutting blade 7, and the harvested stem culm is raked backward by a pair of left and right raking packers 8at8b. After continuing to be conveyed rearward by the pinching conveyor chain 9, the grains are conveyed rearward by the cooperation of the head locking conveyor device 10 and the stock head clamping conveyor device 11, and then transferred to the feed chain of the rear threshing device 2. It is planned to be handed over to the 12th.

In configuring the plant clamping and conveying device 11, a chain 13 for conveying stem culms is connected to a driving wheel body 1 each consisting of a sprocket.
4, a passive wheel 16, and a tension wheel 19, and guides 30 which are provided at appropriate intervals facing the winding chain 13, and the chain 13 are arranged to clamp and convey the base of the stem culm.

To attach the tensioning wheel 19, as shown in FIG.
A screw shaft 20 of an adjusting tool consisting of a screw shaft and a nut is slidably fitted into the flange 27 fixed to the mounting member IB, and the screw shaft 20 of the adjusting tool is slidably fitted into the flange 27 fixed to the mounting member IB. one nut 2
8. Hold the flange 27 at 28 and tighten the screw shaft 20.
is connected and fixed to the mounting member 18, and the screw shaft 20 is slidably held by a pair of brackets 22 and 23 fixed to the support member 21 of the wheel body 19 with a space between them.

A compression coil spring 24 biasing the wheel body 19
is fitted onto the screw shaft 20 between the brackets 22 and 23, and a nut 25 of the adjustment tool is screwed onto the screw shaft 20 between the bracket 22 and the wheel 19 on the wheel body 19 side, Then, a collar 26 for applying the pressing force of the spring to the nut 25 with one side 23 of the bracket as a reaction force point is inserted through the bracket 22 on the wheel body 19 side, and the screw between the spring 24 and the nut 25 is tightened. axis 20
It is fitted externally to the part.

The upper parts of the pair of brackets 22 and 23 are connected by a plate 31 so as to cover the upper part of the spring 24.

Next, the operation of the above embodiment will be explained.

At the initial stage of assembly, the tension ring 19 is made to protrude from the support member 21 by screwing in the nut 25 until a desired tension is applied to the chain 13.

When the chain 13 becomes slack due to long-term use and there is a gap between the nut 25 and the bracket 22, the nut 25 is screwed in until it contacts the bracket 22.
By compressing the spring 24 to its initial length, the chain 1
The tension state in step 3 is restored to the initial setting state.

[Brief explanation of the drawing]

The drawings show an embodiment of the chain tension structure of the stem culm conveying device according to the present invention, and FIG. 1 is an overall side view of the combine harvester, and FIG.
The figure is a partially omitted plan view of the reaping section, and Figure 3 is the same as in Figure 2.
FIG. 13...Chain, 18...Mounting member, 19...Tension wheel, 20...Spiral shaft, 21...Supporting member , 22...23...
... Bracket, 24 ... Spring, 25.
...Natsuto, 26...Color, 31...
...Plate body.

Claims (1)

[Scope of utility model registration request] The mounting member 18 to which the tension wheel 19 is attached is attached to the support member 21.
A spring 24 is provided to apply a constant tension to the chain 13 by providing a spring 24 that is slidably fitted to the mounting member 1B and biases the mounting member 1B. - In a chain tension structure of a stem culm conveying device in which the biasing force of the spring 24 is adjusted and maintained constant by an adjusting tool consisting of a nut 25, the screw shaft 20 of the adjusting tool is connected to the mounting member 1.
8 and the screw shaft 20 is connected and fixed to the support member 21.
The spring 24 is fitted onto a pair of brackets 22, 23 attached to the brackets 22, 23 so as to be retractable and retractable, and the spring 24 is externally fitted onto a portion of the screw shaft 20 between the pair of brackets 22, 23. The upper parts of the tensioning wheel 19 are connected to each other by a plate 31 to cover the spring 24, and the nut 25 of the adjusting tool is screwed onto the helical shaft 20 between the bracket 22 on the tensioning wheel 19 side and the tensioning wheel 19. At the same time, a bracket 22 on the side of the tension wheel is passed through a portion of the screw shaft 20 between the nut 25 and the spring 24, so that the amount of operation of the nut 25 can be controlled by the amount of operation of the nut 25.
A chain tension structure for a stem and culm conveying device, characterized in that a collar 26 that transmits transmission to the stem and culm is externally fitted.