JPH0454966Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a chain holding device for reliably engaging a conveyance chain with a power extraction sprocket in a conveyance device.

○ Conventional technology As a chain holding device for this type of conveyance device,
Structures shown in FIGS. 5 and 6 are known. Conveying chain 2 engaged with sprocket 12
A mounting portion 3 of a chain presser foot 1 having a pressing portion 1a that acts to press the sprocket toward the sprocket 12 is fixed to a bracket 5 by a tightening bolt 4.

○ Problems to be solved by the invention In the above-mentioned conventional technology, the pressing portion 1a is brought into contact with the conveying chain 2 by the spring action of the chain presser 1, and the conveying chain 2 is elastically pressed toward the sprocket 12. However, the spring load on the chain presser foot 1 from the conveyor chain 2 is concentrated at point P, and P
Due to metal fatigue at the point, it breaks from point P, and the broken pieces fall into the threshing device, causing damage to internal components such as the No. 1 conveyor and No. 2 conveyor of the threshing device.

○Means for solving the problem The present invention is to bend the attachment part 3 of the chain presser foot 1 into a U shape and connect the lower loose part 6 and the upper fixing part 7.
The fixed part 7 is fixed to the bracket 5 with the tightening bolt 4, the loose part 6 is loosely engaged with the collar 9 inserted into the tightening bolt 4, and the collar 9 is connected to the fixed part 7.
The present invention provides a chain holding device for a conveying device which is brought into contact with the upper surface of a bracket.

○ Function The fixed part 7 of the mounting part 3 of the chain presser foot 1 is fixed to the bracket 5 via the tightening bolt 4, but the loose part 6 is loosely engaged with the tightening bolt 4, and cannot be tightened. The tightening force of the attached bolt 4 does not act at all.

Therefore, the chain presser foot 1 is elastically deformed around the U-shaped bending point Q.

○ Example An explanation will be given based on an example of the present invention shown in FIGS. 1 and 2.

The pressing portion 1a of the chain presser foot 1 presses the conveying chain 2 as in the conventional device.

The attachment part 3 of the chain presser foot 1 is extended more than the attachment part of the conventional device and bent upward into a U shape to form a two-tiered structure, and a loose part 6 and a fixing part 7 are formed.

The tightening bolt 4 is inserted into the through hole 8 provided in the upper fixed part 7, the collar 9 is interposed between the fixed part 7 and the upper surface of the bracket 5, and the bolt 4 is inserted through the play hole 10 of the play part 6. Then, screw the tightening bolt 4 into the bracket 5 and attach the mounting part 3 of the chain presser foot 1 to the bracket 5.
Fixed to. In Figures 1 and 2, 11
1 is a chain guide, and 12 is a sprocket for power extraction.

3 and 4 show a case where the present invention is applied to a straw conveyance mechanism of a threshing device in a combine harvester, and the conveyance chain 2 is a conveyance chain for conveying straw adjacent to the feed chain 13. The extended portion can also constitute a straw conveyance chain]. An ear tip conveyance chain 14 for conveying the expelled straw ear tip is installed near the center of the body of the conveyance chain 2 for conveying the discarded straw stock source, and the above-mentioned power is attached to one end of a sprocket shaft 16 integral with the ear tip drive sprocket 15 for the ear tip conveyance chain 14. A sprocket 12 for taking out is attached, and the tip conveying chain 14 is driven by the power of the conveying chain 2 via the sprocket 12, the sprocket shaft 16, and the tip driving sprocket 15. Referring to FIG. 4, the drive sprocket 17 of the conveyance chain 2 is connected to the transmission mechanism 1.
The conveying chain 2 is configured to receive power from the PTO shaft 19 and to be driven by the PTO shaft 19 of the threshing device. In Figure 3, 20
21 is a reaping operation unit, 21 is a driving device, 22 is a threshing device, 23 is a fourth opening of the threshing device, and 24 is a straw cutting device.

In the above-mentioned installation state, the attachment part 3 of the chain presser foot 1 is clamped with its fixed part 7 between the head 4a of the tightening bolt 4 and the upper end of the collar 9, and is attached to the bracket via the tightening bolt 4. However, due to the existence of the loose fitting hole 10, the tightening force of the tightening bolt 4 does not act on the loose fitting part 6 at all.

Therefore, with respect to the load applied to the pressing portion 1a,
The chain presser foot 1 is elastically deformed around the U-shaped bent portion Q.

○ Effects of the invention In this invention, the attachment part of the chain presser foot is bent into a U-shape, and the loose fitting part on the lower side is loosely engaged with the tightening bolt. The spring effect of the chain presser foot is greater than that of the chain presser foot, and the required strength of the bracket can be lowered.
In addition to the vertical movement of the chain, it can also respond to movement in the direction of chain movement, and has the effect of absorbing excessive loads applied to the chain presser foot.

In addition, since the upper surface of the collar is brought into contact with the lower surface of the fixed part 7 of the attachment part 3 of the chain presser foot, and the lower surface is brought into contact with the upper surface of the bracket 5, the height position of the fixed part 7 with respect to the upper surface of the bracket 5 can be adjusted. can be set to a desired value by selecting the length of the collar 9, and
As a result, it is possible to maintain a predetermined height position while allowing movement in the play range, and as a result, excessive U-shaped deformation of the mounting portion can be prevented and damage to the mounting portion can be prevented.

In addition, even if the chain foot is damaged, it will break at the U-shaped bend between the fixed part and the loose part, so the broken piece will be tightened by the loose fit between the loose part and the tightening bolt. It is held in place by bolts. Therefore, when the present invention is applied to a power take-off device for conveying the waste straw tip, the power take-off device is located above the fourth port of the threshing device, but broken pieces may fall into the threshing device. This has the effect of preventing damage to the No. 1 conveyor, No. 2 conveyor, etc. in the threshing device.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a chain holding device of a conveying device showing an embodiment of the present invention. FIG. 2 is also a front view. FIG. 3 is a plan view of a combine harvester showing an application example of the chain holding device of the conveying device of the present invention;
The figure is a plan view of the straw removal mechanism. FIG. 5 is a longitudinal cross-sectional view of a chain holding device of a conveying device showing the prior art. FIG. 6 is also a front view. 1... Chain presser foot, 2... Conveyance chain, 3...
...Chain foot attachment part, 4...Tightening bolt, 5
... Bracket, 6 ... Playing part, 7 ... Fixed part.

Claims (1)

[Scope of utility model registration request] In a chain presser device for a conveyance device having a chain presser foot 1 for pressing a conveyance chain 2 of the conveyance device, the mounting portion 3 of the chain presser foot 1 is bent into a U shape to connect the lower joint portion 6 and the upper side. It has a two-stage structure with a fixed part 7, the fixed part 7 is fixed to the bracket 5 by the tightening bolt 4, the loose part 6 is loosely engaged with the collar 9 inserted into the tightening bolt 4, and the collar 9 is attached to the upper surface of the bracket 5. A chain presser device for a conveyance device, characterized in that the chain presser foot 1 is brought into contact with the lower surface of the fixing portion 7 of the attachment portion 3 of the chain presser foot 1, and the lower surface thereof is brought into contact with the upper surface of the bracket 5.