JP4344254B2 - Stopper device - Google Patents

Description

  The present invention relates to a stopper device for an agricultural machine.

Conventionally, for example, a rod insertion body having a rod hole through which a rod for supporting a leveling body is inserted, a restriction position for restricting movement of the rod insertion body with respect to the rod at a rear position of the rod insertion body, and a rod with respect to the rod A stopper device that includes a stopper body (stopper pin) that selectively moves to an allowable position that allows movement of the inserted body is known (see, for example, Patent Document 1).
JP 2001-128503 A

  However, in the above-described conventional stopper device, there is a possibility that problems such as deformation of the stopper body may occur when a relatively large load is applied to the stopper body when the stopper body is moved to the restriction position.

  This invention is made in view of such a point, and it aims at providing the stopper apparatus which can prevent suitably malfunctions, such as a deformation | transformation of a stopper body.

The stopper device according to claim 1, a rod insertion body having a rod hole through which a rod for supporting a leveling body is inserted, a restriction position for restricting movement of the rod insertion body with respect to the rod, and the rod with respect to the rod A stopper body that selectively moves to an allowable position that allows movement of the rod insertion body, the rod insertion body has a stopper body hole having a shape corresponding to the stopper body, and the stopper body is A stopper device that is inserted into the stopper body insertion hole and the stopper body insertion hole of the rod when in the restricted position, the device main body having an engaging portion; An operation lever for moving the stopper body, and a spring for urging the lock section, the stopper body being the restriction The lock portion is biased by the spring and is engaged with the engagement portion in a state where the lock lever is located, and the operation lever cannot be rotated by this engagement, and the lock portion is biased by the spring. By moving against this, the engagement between the lock portion and the engagement portion is released, and the operation lever can be turned .

The stopper device according to claim 2 is the stopper device according to claim 1, wherein when the stopper body is positioned at the allowable position, the tip of the stopper body is easy to pick up the stopper body insertion hole of the rod. It is located in the hole.

According to the present invention, when the stopper body is in the restricted position, the stopper body is inserted into the stopper body hole and the stopper body insertion hole, so that the rod inserted body receives a load from the rod, It is possible to appropriately prevent problems such as deformation of the stopper body .

  An embodiment of an agricultural machine according to the present invention will be described with reference to the drawings.

  In FIGS. 1 and 2, reference numeral 1 denotes an agricultural machine. The agricultural machine 1 is connected to a tractor (not shown) that is a traveling vehicle, for example. Is what you do. The stand 2 that supports the agricultural machine 1 when not working is removed from the agricultural machine 1 when working.

  And the agricultural working machine 1 is equipped with the body 3 connected with the three-point link part of the rear part of a tractor.

  The body 3 is provided with a rotary cultivator 5 that performs a cultivating operation while driving and rotating in a predetermined direction by power from the input shaft 4 connected to the PTO shaft of the tractor via a universal joint or the like. The tillage body 5 has a tillage axis in the left-right direction, and a plurality of tillage claws are provided radially on the tillage axis.

  Further, the machine body 3 is provided with a substantially plate-shaped leveling body (level plate) 6 that performs leveling work at the rear position of the tillage body 5 so as to be rotatable in the vertical direction. That is, the front end portion of the leveling body 6 is pivotably attached to the rear end portion of the cover portion 8 of the body 3 via the shaft portion 9 in the left-right direction. It rotates in the vertical direction so that the end side moves up and down. The leveling body 6 has a substantially plate-shaped leveling body main body plate portion 11 that is long in the left-right direction, and a protruding plate portion 12 projects upward from the upper surface of the leveling body main body plate portion 11.

  Further, the machine body 3 is provided with a rod 14 for supporting the leveling body having a substantially circular cross section and an elongated bar shape for supporting the leveling body 6 so as to be rotatable in the vertical direction. That is, the front end portion of the rod 14 is rotatably attached to the rod attachment portion 15 of the airframe 3 via the shaft portion 16 in the left-right direction, and the rod 14 moves up and down around the shaft portion 16 on the front end side. So as to rotate up and down.

  As shown in FIGS. 3 and 4, the rod 14 has an elongated and substantially cylindrical shape, and a first coil spring 17 and a second coil spring 18 having different lengths are attached to the outer peripheral side of the rod 14. ing. The rod 14 is provided with a substantially circular spring force adjusting hole 19 in parallel and a stopper body insertion hole 20 which is one substantially circular fixing hole slightly larger than the spring force adjusting hole 19. Is formed.

  Between the leveling body 6 and the rod 14, a leveling body fixing stopper device 21 for fixing the leveling body 6 to the rod 14 is disposed.

  Here, as shown in FIGS. 3 to 8, the stopper device 21 serving as the stopper means includes a device main body 23, and the device main body 23 has a substantially U-shaped holding in a pair of left and right sides facing each other. A frame portion 24 is provided at the bottom.

  A rod insertion body (tumbler) 26 having a rod hole 25 through which the leveling member support rod 14 is slidably inserted is fixedly provided on the holding frame portion 24 of the apparatus main body 23. . That is, a rod insertion body 26 is fitted inside the holding frame portion 24 of the apparatus body 23, and the snap ring 27 is inserted into the rod insertion body so that the rod insertion body 26 does not come out of the inside of the holding frame portion 24. It is mounted in the groove portion 28 of the body 26.

  The rod insertion body 26 has a substantially cylindrical shape having an axial direction in the left-right direction, and a rod hole 25 in the front-rear direction having a substantially circular cross section is formed at a substantially central portion of the rod insertion body 26. The rod 14 is inserted into the rod hole 25. In addition, an upper and lower stopper body hole 29 having a substantially circular cross section is formed in the upper and lower portions of the substantially central portion in the axial direction of the rod inserted body 26. Both stopper body holes 29 are formed in the rod hole 25. Communicate.

  In addition, the protruding plate part 12 of the leveling body 6 is rotatably attached to the outer peripheral side of the both ends in the axial direction of the rod inserted body 26.

  Further, the device main body 23 is in contact with the portion of the rod 14 facing the stopper body insertion hole 20 to restrict the movement of the rod inserted body 26 relative to the rod 14 and the movement of the rod inserted body 26 relative to the rod 14 A stopper body that selectively moves to a permissible position that allows for example, for example, a stopper pin 31 having a substantially circular cross section having a longitudinal direction in a direction (vertical direction) perpendicular to the longitudinal direction of the rod 14 is provided in the longitudinal direction of the stopper pin 31. It is provided to be movable in the vertical direction along.

  When the stopper pin 31 is in the restricted position, the stopper pin 31 is inserted into the stopper body hole 29 of the rod inserted body 26 and the stopper body insertion hole 20 of the rod 14 that are aligned in the vertical direction. At the time of the position, at least the stopper body insertion hole 20 is pulled out upward.

  The stopper body hole 29 and the stopper body insertion hole 20 are substantially the same size, and the outer diameter of the stopper pin 31 that enters and exits these holes 20 and 29 is the opening diameter of the holes 20 and 29. It is a slightly smaller dimension. That is, the holes 20 and 29 have a shape corresponding to the stopper pin 31 and have a shape into which the stopper pin 31 is fitted.

  On the other hand, as shown in FIG. 7, the device main body 23 is provided with an operation lever 34 with a lock portion 33 for moving the stopper pin 31 so as to be rotatable. A winding spring 35, a stop pin 36, a first pressing spring 37, and an E-ring 38 that are interlocked with the rotation of the E-ring 38 are disposed.

  The lock portion 33 is urged by the second push spring 39 to engage with the engaging portion 41 of the guide groove 40, and the operation lever 34 is rotated by the engagement between the lock portion 33 and the engaging portion 41. It becomes impossible. By pushing down the lock portion 33 against the urging force of the second push spring 39, the engagement between the lock portion 33 and the engagement portion 41 can be released, and the operation lever 34 can be rotated. Further, as shown by a two-dot chain line in FIG. 8, when the stopper pin 31 is in the allowable position, the tip end portion 31 a of the stopper pin 31 is placed in the stopper body hole 29 so that the stopper body insertion hole 20 can be easily picked up. To position. When the tip 31a of the stopper pin 31 is extracted upward from the stopper body hole 29, the stopper pin 31 may be pulled upward against the urging force of the first pressing spring 37.

  Next, the operation and the like of the one embodiment will be described.

  When the leveling body 6 is fixed to the rod 14 using the stopper device 21 which is a fixing means, the operation lever 34 is moved in a predetermined direction (clockwise direction in FIG. 7) after the lock by the lock portion 33 is released. When the leveling body 6 is lifted with both hands and is rotated upward about the shaft portion 9, the rod 14 is rotated upward about the shaft portion 16, and the rod inserted body 26 is moved to the rod 14. Move along this rod 14.

  When the rod inserted body 26 moves by a desired amount and the stopper body insertion hole 20 of the rod 14 and the stopper body hole 29 of the rod inserted body 26 are aligned with each other in the vertical direction, the stopper pin 31 is It moves downward toward the restriction position by the urging force of 35, is inserted into the stopper body hole 29 and the stopper body insertion hole 20, and is inserted into the stopper body hole 29 and the stopper body insertion hole 20. .

  As a result, the outer peripheral portion of the stopper pin 31 and the portion of the rod 14 facing the stopper body insertion hole 20 come into contact with each other, and this contact restricts the movement of the rod insertion body 26 relative to the rod 14 so that the leveling body 6 Fixed against 14.

  And in the fixed state (lock state) of this leveling body 6, maintenance or washing | cleaning etc. of the tilling body 5, the leveling body 6, etc. can be performed easily.

  In the case of performing the tilling work using the tiller body 5 and the leveling body 6, when the leveling body 6 is released, that is, when the leveling body 6 is in a free state, the lock by the lock unit 33 is released. If the operation lever 34 is rotated in a predetermined direction (counterclockwise direction in FIG. 7), the stopper pin 31 moves upward toward the allowable position in conjunction with the operation lever 34, and the stopper body It is extracted from the use hole 29 and the stopper body insertion hole 20.

  According to such a farm work machine 1, the stopper pin 31 is inserted into the stopper body hole 29 of the rod inserted body 26 and inserted into the stopper body insertion hole 20 of the rod 14 when moving to the restriction position. Therefore, the rod insertion body 26 receives a load (the weight of the leveling body 6 and the like) from the rod 14, and the rod insertion body 26 holds the rod 14 so that the rod 14 is not deformed. To do. For this reason, it is possible to appropriately prevent the occurrence of defects such as deformation and damage of the stopper pin 31 as compared with the conventional case, and to reduce the strength required for the stopper pin 31.

  Note that the agricultural machine 1 is not limited to the configuration in which the rod 14 and the stopper device 21 and the like are provided on both the left and right sides, and may be a configuration in which the rod 14 and the stopper device 21 and the like are provided at substantially the center in the left and right direction.

  Further, the stopper body that restricts the movement of the rod inserted body 26 with respect to the rod 14 is not limited to the elongated rod-like stopper pin 31, but may be a plate-like one.

It is a side view of the leveling body lock state which shows one embodiment of the agricultural machine of the present invention. It is a side view of the leveling body free state of a farm working machine same as the above. It is a side view of the rod part of an agricultural working machine same as the above. It is a bottom view of the rod part of a farm work machine same as the above. It is a side view of the stopper apparatus of an agricultural working machine same as the above. It is a bottom view of the stopper apparatus of an agricultural working machine same as the above. It is operation | movement explanatory drawing of the stopper apparatus of an agricultural working machine same as the above. It is a partial cross section figure of the stopper apparatus of an agricultural working machine same as the above.

Explanation of symbols

14 Rod for supporting leveling body
20 Stopper body insertion hole
21 Stopper device
23 Main unit
25 Hole for rod
26 Rod insert
29 Stopper hole
33 Lock part
34 Control lever
2nd push spring which is 39 spring
41 engaging part

Claims (2)

A rod insertion body having a rod hole through which a rod for ground leveling body support is inserted;
A restriction body that restricts movement of the rod insertion body relative to the rod and a stopper body that selectively moves to an allowable position that permits movement of the rod insertion body relative to the rod;
The rod insertion body has a hole for a stopper body having a shape corresponding to the stopper body,
The stopper body is a stopper device that is inserted into the stopper body insertion hole and the stopper body insertion hole of the rod when the stopper body is in the restricted position ,
An apparatus main body having an engaging portion;
An operation lever that is rotatably provided in the apparatus main body, has a lock portion, and moves the stopper body;
A spring for biasing the lock part,
In a state where the stopper body is located at the restriction position, the lock portion is urged by the spring and engages with the engagement portion, and the engagement prevents the operation lever from rotating, and the lock portion The stopper device is characterized in that when the spring moves against the urging force of the spring, the engagement between the lock portion and the engagement portion is released and the operation lever can be rotated . When the stopper body is in the allowable position, the tip of the stopper body is located in the stopper body hole so that the stopper body insertion hole of the rod can be easily picked up.
The stopper device according to claim 1.

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