JPH0441791Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a gear transmission for transversely feeding the seedling tray only when the seedling tray is reciprocated in the width direction and is at the end of the traverse stroke. The present invention relates to a speed change check mechanism for a rice transplanter, which is provided with a speed change check mechanism for the gear transmission so as to allow a speed change operation of the rice transplanter.

[Conventional technology]

In the rice transplanter mentioned above, conventionally, for example,
As shown in Publication No. 18449, a check stopper of a speed change check mechanism acts on a shift gear member of a gear transmission,
The following inconvenience occurred.

[Problem that the invention attempts to solve]

In order not to miss the predetermined shift timing when the seedling tray reaches the end of the traverse stroke, an operating force is applied to switch the shift gear member of the gear transmission before the seedling pedestal reaches the end of the lateral stroke. Continuing on, when changing gears using a method in which the shift gear member is switched when the seedling tray reaches the end of the traversal stroke, the restraining stopper and the rotating shift gear member are in sliding contact until the shift is completed. If the shift gear member or restraining stopper is worn out and its service life is shortened, or if the shift operation force is maintained by manual maintenance of the shift operating tool, the sliding contact between the stopper and the shift gear member may There were times when the vibrations were transmitted to my hands and I felt discomfort.

The purpose of the present invention is to modify the vehicle so that even when the above-mentioned speed change method is adopted, the speed can be changed without causing wear of the members or causing unpleasant vibrations.

[Means for solving problems]

The feature of the present invention is that the speed change check mechanism of the rice transplanter as described above is configured as follows. In other words, in a gear transmission for lateral feeding of a seedling stand, a check is provided to stop the gear shifting operation of the gear shifting member by coming into contact with the gear shifting member that slides the shift gear member of the gear transmission. and a biasing means for biasing the stopper away from the operating position where the stopper contacts the speed change operating member, and preventing movement of the stopper away from the operating position by contacting the stopper at the operating position. and an operating means for removing the blocking member from the stopper when the seedling tray that is reciprocated in the width direction reaches the end of the stroke of the horizontal feed, thereby stopping the horizontal stroke of the seedling tray. At the end, the stopper is moved away from the operating position to allow the speed change operation of the speed change operation member.

[Effect]

With the above-described structure, the stopper comes into contact with the speed change operating member (in its working position) to stop the speed change operation of the speed change operating member while the seedling stand is being moved laterally.

In this case, the gear shift operation member does not rotate, so
At the contact portion between the stopper and the gear shift operating member, no member wear or vibration occurs due to rotation.

Further, while the seedling stand is being moved laterally, a blocking member comes into contact with the stopper and holds the stopper in the operating position. Therefore, even if the stopper attempts to move away from the operating position due to vibrations or the like during traversing, the stopper is reliably held at the operating position by the abutting action of the blocking member.

When the seedling stand reaches the stroke end of the horizontal feed, the blocking member is removed from the stopper by the operating means, and the stopper is moved away from the operating position by the action of the biasing means. As a result, the shift operation member starts the shift operation, and the shift operation is performed.

[Effect of idea]

As described above, when a speed change check mechanism is provided that allows the speed change operation to be performed at the end of the stroke of lateral feeding of the seedling stand, it is possible to configure it so that wear and vibration of members due to rotation do not occur. This made it possible to improve the durability of the speed change check mechanism.

Since the stopper is held in the operating position by the blocking member during the horizontal movement of the seedling platform, the stopper does not separate from the speed change operation member during the horizontal movement of the seedling platform. A highly efficient transmission control mechanism can be obtained.

〔Example〕

As shown in FIG. 7, a seedling planting device 3 is connected to the rear of the wheeled traveling body so as to be raised and lowered via a link mechanism 2 that is operated to swing up and down by a hydraulic cylinder 1, and A riding-type rice transplanter is configured such that power is transmitted from the machine body to the seedling planting device 3 via the rotating shaft 4.

The seedling planting device 3 includes a planting arm 7 which is attached to the rear of a transmission case 5 as a body of the planting device so as to be driven to swing up and down via a link mechanism 6.
A seedling feeding unit is attached to the transmission case 5, and the seedling feeding unit is installed so as to feed the seedlings to the planting arm 7 while reciprocating the seedling tray 8 in the width direction in conjunction with the seedling planting movement of the planting claw 9. A grounding float 10 is attached to the lower part of the transmission case 5 on the front end side.

In order to enable the reciprocating transportation of the seedling stand 8, it is constructed as follows.

That is, as shown in FIG.
A rail member 1 that forms a seedling supply port 11 and receives and supports the lower end side of the seedlings placed on the seedling stand 8.
2 and is attached to the transmission case 5 via a support 13 so as to be able to slide laterally. Figures 1 and 2
As shown in the figure, a pair of interlocking rods 15 are arranged to distribute the horizontal feed shaft 14 of the seedling tray at the left and right ends of the shaft.
a, 15b, and a cylindrical shaft 17 that is rotatable relative to the seedling rest lateral feed shaft 14 while connected to the seedling rest 8 so as to move integrally through a rod 16 connecting these interlocking rods 15a, 15b; And, it is slidably attached to the transmission case 5 via a bearing 18, and the feeder 1 of the transverse feed shaft 14 of the seedling stand
9 is rotatably attached to the cylindrical shaft 17 in such a manner that the protrusion 19a enters the spiral groove 14a of the transverse feed shaft 14 of the seedling stand. A large-diameter gear 20 and a small-diameter gear 21 are attached to the cylindrical shaft 17 so as to be integrally rotatable, and a shift gear member 22 that can engage with both the gears 20 and 21 is gear-interlocked with the input shaft 23 of the transmission case 5. It is integrally rotatably and slidably attached to the planting arm transmission shaft 24, and constitutes a two-speed gear transmission 25 for transversely feeding the seedling stand.

Specifically, the rotational force of the transmission shaft 24 is transmitted to the cylindrical shaft 17 by the gear transmission 25, and the feeder 19 is rotationally driven, so that the seedling tray lateral feed shaft 14 moves the planting claws 9 to plant the seedlings. The seedling stand 8 is moved back and forth in conjunction with the movement. Then, the shift gear member 2
2 and a shifter 3 rotatably engaged with the shifter 3.
8. The gear transmission is activated by the sliding operation of the shift gear member 22 by the shift operating tool 40, which is interlocked via the slidable shifter support shaft 26 (corresponding to the gear shifting operating member) and a pair of springs 39a and 39b. By shifting 25 times,
The moving speed of the seedling tray lateral feed shaft 14 is changed, and the transfer speed of the seedling tray 8 is changed so that the amount of supplied seedlings in the width direction of the seedling tray 8 is changed.

As shown in FIGS. 2 and 3, a releasable stopper 27 for restraining the shifter support shaft 26, and an operating arm portion 27 of this stopper 27
A rotary cam 29 is integrally rotatably attached to the cylindrical shaft 17 so as to swing the stopper 27 around the axis of the stopper rotation support shaft 28 by acting on the rotation support shaft 28. A releasable catch 31 (corresponding to a blocking member) for the extended stopper operation arm 30, this catch 31
is attached to the transmission case 5, and the operating rod 32, which serves as a restraining release member for switching between an operating position and an operating release position, urges the stopper 27 and the stopper operating arm 30 away from the operating state (corresponding to the operating position), which will be described later. spring 33
(corresponding to a biasing means), a speed change check mechanism that can freely release the gear transmission 25 and is biased to the activated state from each of the springs 34 that bias the operating rod 32 to the check position (ON). It consists of 35. In other words, the operating rod 3
2 is in the check position (ON), as shown in FIG.
The stopper operating arm 30 moves the stopper 27 away from the cylinder shaft 17 against the spring 33, and the stopper operating arm 30 moves the stopper 27 into the movement path of the plate 36 whose free end is attached to the shifter support shaft 26. Shifter support shaft 2
The stopper 27 is connected to the shifter spindle 2 so that the sliding operation cannot be performed from the high speed position or the low speed position of 6.
6. And the operating rod 32
When the stopper is slid to the check release position (OFF ₁ ) or (OFF ₂ ), as shown in FIGS. 4 and 5, the stopper 31 comes off from the stopper operation arm 30,
The stopper operation arm 30 is operated by the spring 33 to the side approaching the cylinder shaft 17, and the rotating cam 2
9 can now operate the stopper 27, and the feed tool 19 can be moved to a rotational position other than the set rotational position for gear shifting.
4, the operating arm 27a rides on the circumference of the rotating cam 29, and the stopper 27 is in an operating state with its free end entering the movement path of the plate 36. However, only when the feeder 19 is operated to the set rotational position for gear shifting, the free end side of the operating arm portion 27a is moved as shown in FIG. The stopper 27 enters the recess 29a of the rotary cam 29, and the stopper 27 is removed from the movement path of the plate 36 and becomes in a released state, allowing the shifter support shaft 26 to slide.

As shown in FIG. 1, a rod-shaped operating tool 37 for the operating rod 32 is connected to
a, 15b so as to be a member connecting them, and
It is constructed and connected to the pair of interlocking rods 15a and 15b so as to move together with the seedling stand 8. and,
The operating tool 37 includes a pair of operating parts 37a and 37b (corresponding to operating means) for the operating rod 32.
One of the operating portions 37a is operated only when the seedling tray 8 is at the left side traversal stroke end, and the other operating portion 37b is operated only when the seedling tray 8 is at the right side lateral feed stroke end. 32
The seedling tray 8 is arranged so as to be in contact with the state in which it is pressed to the restraint release position (OFF ₁ ) or (OFF ₂ ), and the seedling tray 8 can be set for transverse feeding on the left or right side as the setting transverse feeding position for speed change. The speed change operation of the gear transmission 25 is made possible only when the feed tool 19 is at the stroke end and at the set rotational position for speed change.

[Another example]

Although the above-mentioned speed change check mechanism 35 is designed to specify the rotational position of the feeder 19 when making a speed change operation possible, the present invention can also be applied to a speed change check configuration that does not provide this specifying measure. is applicable.

The shifter 38 may be used instead of the shifter support shaft 26 as the member on which the check stopper of the speed change check mechanism acts, and these members are collectively referred to as the speed change operation member 26.

[Brief explanation of the drawing]

The drawings show an embodiment of the speed change check mechanism for a rice transplanter according to the present invention, FIG. 1 is a plan view of the arrangement part of the speed change check release operating tool, FIG. 2 is a sectional view of the speed change check mechanism, and FIGS. FIG. 5 is a partially cutaway side view of the speed change check mechanism, FIG. 6 is a partially cutaway side view of the seedling supply section, and FIG. 7 is a side view of the entire riding rice transplanter. 8... Seedling stand, 22... Shift gear member,
25... Gear transmission, 26... Speed change operation member, 27... Check stopper, 27
...stopper, 31...blocking member, 33...biasing means, 37a, 37b...operating means.

Claims (1)

[Claims for Utility Model Registration] 1. In the gear transmission 25 for lateral feeding of the seedling stand 8, the shift gear member 22 of the gear transmission 25 is brought into contact with the speed change operation member 26 for sliding operation. , a biasing means 33 that includes a stopper 27 for restraining the speed change operation of the speed change operation member 26, and urges the stopper 27 away from the operating position where it contacts the speed change operation member 26;
Stopper 27 on the side away from the working position
When the seedling tray 8 that is reciprocated in the width direction reaches the stroke end of the horizontal movement, the blocking member 31 is moved away from the stopper 27. The stopper 27 is provided with operation means 37a and 37b for disengaging operation, and is configured so that at the end of the stroke of lateral feeding of the seedling stand 8, the stopper 27 leaves the operating position and allows the speed change operation of the speed change operation member 26. Speed change control mechanism for rice transplanters. 2. The speed change check mechanism for a rice transplanter according to claim 1, wherein the speed change operation member 26 is a shifter support shaft.