JPH10327602A - Method of exchanging tillage tines of tractors and jig for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method safely and securely exchanging rotary tillage tines of tractors without using locking pin, etc. SOLUTION: A replacing tool 20 having length enough to handle the end of the tool when the worker is positioning at the outside of the radius of gyration of the tillage tine 13, is used in this process, the tip of the replacing tool is inserted into the space between the protruding part from the fastening bracket of the attaching bracket 12 and the shaft 11, holding the other end of the replacing tool to stop the rotation of the attaching bracket, replace the tillage tines by slacking or fastening the fastening brackets of the attaching bracket excluding the rotation inhibited attaching bracket by a screw wrenches 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and a jig for replacing a rotary tilling claw of a tractor, and more particularly to a method and a jig for safely and securely replacing a rotary tilling claw.

[0002]

2. Description of the Related Art There are various drive systems such as a side drive and a center drive for tractors and cultivators (hereinafter referred to as tractors). In general, a structure is used in which a plurality of mounting brackets are formed at appropriate angular intervals in the circumferential direction, the base of the tilling nail is inserted into each mounting bracket, and the bolt is inserted through the base of the tilling nail and fastened to the nut. Has been adopted.

[0003] In such tractors, when tilling the fields, the tilling claws are likely to hit the pebbles or the like, or be rubbed against each other, causing the cutting edge to be chipped or worn. Required.

When replacing the tilling nail, hold the tilling nail with one hand, hold the wrench or wrench with the other hand, loosen the bolts and nuts with a wrench or wrench, pull out the tilling nail from the mounting bracket, and remove it. A new tilling claw was inserted into the wrench, a bolt was inserted and screwed into the nut, and the bolt and nut were strongly tightened.

[0005]

However, in the conventional replacement method, since the tilling claw is held with one hand, the interval between the worker and the cultivating claw is narrow, and the spanner or wrench slides on the bolt / nut. There was a risk that the worker's head would hit the tilling claw at that time, causing injury.

On the other hand, a method has been proposed in which the shaft is locked to a fixed structure portion of the tractor with a lock pin or the like to perform a replacement operation. There is a concern that the tractors may be moved and the gears may be damaged.

Further, since the bolts and nuts are fastened with one hand, sufficient fastening may not be performed.
There is a concern that the bolts and nuts will loosen during use and the tilling claws will come off. Some recent tractors have a reversing rotary function, and reversing the rotary causes the tilling claws to shake, so there is a concern that bolts and nuts may become loose.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a rotary tilling claw for a tractor, which can replace a cultivating claw safely and securely without using a lock pin or the like and can be fastened with a sufficient fastening force. It is an object to provide a replacement method.

[0009]

SUMMARY OF THE INVENTION Accordingly, a method for replacing a rotary tilling claw of a tractor according to the present invention comprises a plurality of attachments provided at appropriate intervals in the longitudinal direction of the shaft and at appropriate angular intervals in the circumferential direction. In tractors with brackets projecting and inserting the base of the tilling claw into each mounting bracket and fastening with fasteners, when replacing the tilling claw, it was located outside the turning radius of the tilling claw. Using a replacement jig having at least a length that allows an operator to handle the rear end thereof, at least the front end of which can be inserted between the shaft and a portion of the fastener protruding from the mounting bracket, While inserting the tip of the replacement jig between the portion of the fastening fitting projecting from the mounting bracket and the shaft, holding the rear end of the replacement jig,
The mounting bracket is prevented from rotating by abutting the tip of the replacement jig on the portion of the fastener and the shaft that protrudes from the mounting bracket. It is characterized in that the fastening metal is loosened or tightened to replace the tilling claw.

One of the features of the present invention is to insert the tip of the replacement jig having a sufficient length between the fastener of the mounting bracket and the shaft so that the fastener is rotated when the mounting bracket is about to rotate. Further, the mounting bracket is prevented from rotating by being in contact with the shaft, so that the fastening fitting is loosened and tightened. As a result, the cultivator can be replaced with a wrench with a sufficient distance between the worker and the cultivator, and the worker's head can be removed even if the wrench comes off the fastener. Does not hit the tilling nail.

Further, since the replacement jig has a sufficient length, the tractors are not operated while the shaft is locked. Usually, one worker performs the work of replacing the tillage claw, so the worker also handles the rear end of the replacement jig. However, an assistant of the work may perform the work.

The replacement jig has only to be long enough that an operator located outside the turning radius of the tilling nail can handle the rear end. For example, the worker may hold the rear end of the replacement jig with one hand and handle the spanners with the other hand,
In this case, since the fastening operation is performed with one hand, a sufficient fastening force may not be secured. Therefore, it is preferable that the replacement jig be wound around the shaft and the floor so that the operator can use both hands freely.

That is, using a replacement jig having a length that can be bridged between the shaft and the floor surface while being inclined,
The mounting bracket at a position corresponding to the tip of the replacement jig that is hung in a state of being inclined between the shaft and the floor, between the portion of the fastener protruding from the mounting bracket and the shaft. It is preferable that the tip of the replacement jig is inserted, the other end of the replacement jig is placed on the floor, and the other end of the replacement jig is pressed down to prevent the mounting bracket from rotating. .

In this case, the assistant of the work may hold the rear end of the replacement jig with his / her hand or foot. It is preferable to replace the tilling claw by holding down the mounting bracket with a foot to prevent the mounting bracket from rotating, and then loosening or tightening the fastener of the mounting bracket adjacent to the mounting bracket that has been prevented from rotating with a spanner.

When replacing all the tilling nails, the mounting bracket of the tilling nail to be replaced is within an angle range in which the work for loosening and tightening can be performed with a spanner, and is adjacent to the mounting bracket of the tilling nail to be replaced. Any one to be detented
Rotate the shaft appropriately to replace the tilling claw so that the two mounting brackets are at the position corresponding to the tip of the replacement jig that is bridged between the shaft and the floor. Is good.

Further, a jig used in the above-mentioned replacement method is also novel. That is, according to the present invention, a plurality of mounting brackets are protruded at appropriate intervals in the longitudinal direction of the shaft and at appropriate angular intervals in the circumferential direction, and the base of the tilling nail is inserted into each mounting bracket. In a tractor that is to be fastened with a fastening bracket, a replacement jig used when replacing a tilling claw, at least a tip portion of which is inserted between a portion of the fastening bracket projecting from a mounting bracket and a shaft. For replacing a rotary tilling claw of a tractor, which has a length that can be bridged between a mounting bracket at a predetermined angular position of a shaft and a floor surface while having a possible shape. A jig can be provided.

The replacement jig can be manufactured using a pipe or a bar. The material is not particularly limited, but a material that sufficiently withstands a load from a spanner, for example, a metal material is preferable. Further, the replacement jig may be a single pipe or bar, and may be configured to be expandable and contractible, and may be used after being extended.

Although the replacement jig is inserted between the shaft and the portion of the fastener protruding from the mounting bracket to prevent the mounting bracket from rotating, the insertion jig merely causes a shock during operation. May cause the tip to come off. Therefore, it is preferable that at least the distal end portion of the replacement jig is inserted between a portion of the fastener that protrudes from the mounting bracket and the shaft, and has a shape that can be held by the mounting bracket. As the specific shape of the tip portion, for example, a folded U shape, a U shape, a C shape, an L shape, or the like can be adopted.

[0019]

According to the present invention, the tip of the replacement jig is inserted between the fastening bracket of the mounting bracket and the shaft to stop the mounting bracket from rotating, and then fastened with a spanner. Since the metal fittings are loosened or tightened, a sufficient distance can be provided between the worker and the tilling claw, and there is no danger of the worker's head accidentally hitting the tilling claw and causing injury.

Further, the replacement jig has a sufficient length,
Since the tractor is hardly forgotten while being mounted, the tractors are not moved while the shaft is locked, and the gears can be reliably prevented from being damaged.

Further, when the replacement jig has a length that can be hanged between the shaft and the floor surface so that it can be hanged over, and the rear end of the replacement jig is pressed down with a foot, the fastening work can be performed with both hands. Therefore, the fastening can be sufficiently firmly fastened, and the possibility of loosening during use and removal of the tilling nail can be reliably eliminated.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to specific examples shown in the drawings. 1 to 4 show a preferred embodiment of a method for replacing a rotary tilling claw of a tractor according to the present invention. In the figure, a tractor 10 has a shaft 11 extending in the width direction and supported at a rear portion of a vehicle body, and the shaft 11 is rotatably driven by a drive system (not shown).

A plurality of mounting brackets 12 are provided on the shaft 11 at predetermined intervals in the width direction and at predetermined angular intervals in the circumferential direction, and each of the mounting brackets 12 has an insertion hole from the front end side. And the tilling claw 1 is inserted into the insertion hole.
The base of No. 3 is inserted, and a bolt inserted through a bolt hole on the side is screwed to a nut to be fastened.

When the tilling claw 13 is replaced, a shape as shown in FIG. 3, that is, a length that can be bridged between the shaft 11 and the floor surface in an inclined state, specifically, 70 to 100 cm,
A bolt jig which preferably has a length of 85 cm, and has a U-shaped tip and is used for a replacement jig 20 and has a folded-back end protruding from the mounting bracket 12 of the mounting bracket 12 at an appropriate position. (Or a nut) and the shaft 11, the other end of the replacement jig 20 is placed on the floor surface, and is held down with one foot to prevent the mounting bracket 12 and thus the shaft 11 from rotating.

When the preparation is completed, the wrench 30 is used to grip and turn the bolt head or nut of the mounting bracket 12 near the non-rotating mounting bracket 12, loosen the bolt and nut, and pull out the bolt. And the tilling claw 13 can be pulled out from the insertion hole of the mounting bracket 12, so that the base of the new tilling claw 13 is inserted into the insertion hole of the mounting bracket 12, a bolt is inserted and screwed with the nut, and the bolt and nut are tightened with a spanner. If it is tightened with a kind, the tilling nail 13 can be replaced.

The tilling claw 13 of another mounting bracket 12 near the detented mounting bracket 12 can be replaced by the same operation. For the tilling claw 13 in a range where it is not possible to work with spanners, the shaft 11 can be appropriately rotated and then replaced by performing the above-described work.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an attached state of a rotary tilling claw of a tractor to which the present invention is applied.

FIG. 2 is a perspective view showing a shaft in the tractors.

FIG. 3 is a perspective view showing a replacement jig used in the replacement method.

FIG. 4 is a diagram showing the replacement method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Tractor 11 Shaft 12 Mounting bracket 13 Tilling claw 20 Replacement jig 30 Wrench

Claims (7)

[Claims] 1. A plurality of mounting brackets are protruded at appropriate intervals in the longitudinal direction of the shaft and at an appropriate angular interval in the circumferential direction. For tractors that are to be concluded,
In replacing the tilling claw, a portion of a fastening fitting having at least a length such that an operator located outside the turning radius of the tilling claw can handle a rear end thereof, and at least a tip end protruding from the mounting bracket. And using a replacement jig that can be inserted between the shaft and the shaft, inserting a tip end of the replacement jig between a portion of the fastening fitting protruding from the mounting bracket and the shaft, Holding the rear end side of the replacement jig, stop the mounting bracket by contacting the tip of the replacement jig with the portion of the fastener and the shaft protruding from the mounting bracket, B. Tractors, characterized in that the fasteners of the mounting brackets other than the above-mentioned mounting brackets that have been detented with a spanner are loosened or tightened to replace the tilling claws. Tari tillage Tsumeto recombination method. 2. Using the replacement jig having a length that can be bridged between the shaft and the floor while being inclined between the shaft and the floor, hanging the shaft between the shaft and the floor. Inserting the tip of the replacement jig between the shaft and the portion of the fastening bracket projecting from the mounting bracket of the mounting bracket at a position corresponding to the tip of the replacement jig to be passed, Place the other end of the replacement jig on the floor,
2. The method for replacing a rotary tilling claw of a tractor according to claim 1, wherein the other end of the replacement jig is pressed to prevent the mounting bracket from rotating. 3. An operator holds the other end of the replacement jig with a foot to prevent the mounting bracket from rotating, and loosens a fastener of the mounting bracket adjacent to the mounting bracket stopped by a spanner. 3. The method for replacing a rotary tilling claw of a tractor according to claim 2, wherein the tilling claw is replaced by tightening or tightening. 4. The mounting bracket of the tilling nail to be replaced is within an angle range in which loosening and tightening work can be performed with the wrench, and the tilling nail to be replaced should be prevented from rotating adjacent to the mounting bracket of the tilling nail. The shaft is rotated so that any one mounting bracket comes to a position corresponding to the tip of a replacement jig that is hung in a state of being inclined between the shaft and the floor, and the tilling nail is removed. The method according to claim 2 or 3, wherein the replacement operation is repeated. 5. A plurality of mounting brackets are protruded at an appropriate interval in the longitudinal direction of the shaft and at an appropriate angular interval in the circumferential direction. For tractors that are to be concluded,
A replacement jig used when exchanging the tillage claw, wherein at least a tip portion has a shape that can be inserted between a portion of a fastening fitting protruding from the mounting bracket and a shaft, and a predetermined shape of the shaft. A jig for replacing a rotary tilling claw of a tractor, wherein the jig has a length that can be bridged between the mounting bracket at the angle position and the floor surface. 6. A rotary tilling claw for a tractor according to claim 5, wherein said at least a tip portion is inserted between a portion of a fastening fitting protruding from said mounting bracket and a shaft and can be held by said mounting bracket. Replacement jig. 7. The jig for replacing a rotary tilling claw of a tractor according to claim 6, wherein at least the tip portion has a folded U-shape, U-shape, C-shape or L-shape.