JPH0353619Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a detent mechanism for positioning a gear transmission and a shifter to a transmission operation position for a transverse feeding mechanism of a seedling tray, by combining the shifter and a transmission case. This invention relates to the structure of a seedling supply section in a rice transplanter provided in between.

[Conventional technology]

In the above-mentioned rice transplanter, conventionally, the gear transmission can be operated only when the seedling tray is at the end of the traversal stroke or at a setting position for changing the speed. When the main body of the restraining device, which is releasably fixed in position, and the seedling stand are near the predetermined stroke end, the action is released,
A dedicated speed change check mechanism is provided, which includes an operating structure that automatically operates the restraint body so that it is in the active state at other times, and has the following disadvantages.

[Problem that the invention attempts to solve]

That is, since the mechanism for controlling the speed change is a dedicated one, the cost is high.

The purpose of the present invention is to enable speed change checking by effectively utilizing a detent mechanism.

[Means for solving problems]

The characteristic configuration of the present invention is that, in the structure of the seedling supply section of the rice transplanter mentioned above, the lock mechanism that releasably fixes the detent of the detent mechanism in a state where it engages with the shifter is biased to an activated state. In addition, the locking mechanism is provided in a state in which a contact-type operating portion for the locking mechanism is arranged so as to operate the locking mechanism to the unlocked state only when the seedling stand is in the gear setting position. The function and effect of the present invention are as follows.

[Effect]

When the seedling rest is in the set position for shifting, the locking mechanism is operated to the unlocked state by contact with the seedling rest or a member that moves together with it, and the detent returns to its original positioning state and the shifter is activated. When the seedling stand is in a position away from the set position for shifting, the locking mechanism becomes activated due to its self-restoring force, and the detent remains engaged with the shifter, causing the shifter to shift. Lock the device so that it cannot be operated.

[Effect of idea]

Although the detent is in its original positioning state only when the seedling stand is in the set position for shifting, it is possible to perform the desired shift check.
The detent, which was originally used to position the shifter during gear shifting, becomes the main body of the restraining device, so that a restraining structure can be obtained without the need for a dedicated restraining device itself, and the seedling supply after changing the amount of seedlings taken is changed. It has become possible to obtain what is possible at a low price while avoiding problems.

〔Example〕

As shown in FIG. 4, a seedling planting device 3 is attached to the rear of the wheeled traveling body and is movable up and down via a link mechanism 2 that is swung up and down by a hydraulic cylinder 1.
A riding-type rice transplanter is constructed in such a manner that power is transmitted from the traveling machine body to the seedling planting device 3 via the rotating shaft 4.

As shown in FIG. 4, the seedling planting device 3 is configured such that a plurality of seedling planting arms 5 arranged in parallel in the lateral direction of the machine are each driven to swing vertically via a link mechanism 6. A seedling platform 8 is attached to the rear of the transmission case 7 serving as the main body of the machine, and is moved back and forth in the lateral direction of the machine in conjunction with the seedling planting movement of the seedling planting arm 5 to supply seedlings to the seedling planting arm 5. A grounding float 9 is provided on the front end side of the mission case 7, and a grounding float 9 is attached to the lower part of the mission case 7.

In order to make it possible to transport the seedling stand 8 back and forth, it is constructed as shown in FIG.

That is, a pair of connecting rods 10, 1 are attached to the seedling stand 8.
A transverse feed shaft 11 of the seedling tray is connected to the transverse feed shaft 11 so as to move integrally through the transverse feed shaft 11. The case 7 is slidably penetrated, and the seedling stand horizontal feed shaft 1
The operating tool 14 for 1 is attached to the rotary cylinder shaft 12 so that it can only rotate integrally with the protruding member 14a engaging the spiral groove 11a of the seedling tray traversing shaft 11, and the seedling tray traversing mechanism 15 is operated. It is configured. In other words, when the rotary cylinder shaft 12 is driven, the operating tool 14
is rotationally driven and reciprocatingly slides the seedling resting table cross-feeding shaft 11 for engagement with the seedling resting table cross-feeding shaft 11 and the spiral groove 11a, so that the seedling resting table 8 is reciprocated in the width direction. It is. Then, as shown in FIG. 2, a passive member 18 in which a large-diameter first gear 16 and a small-diameter second gear 17 are connected,
A third gear having a small diameter is attached to the rotary cylinder shaft 12 so as to be rotatable integrally therewith, and can be engaged with the first gear 16.
A transmission member 21 in which a gear 19 and a large-diameter fourth gear 20 that can engage with the second gear 17 are connected to a driving side shaft 23 that is gear-interlocked with an input shaft 22 from the rotating shaft 4. The rotational force of the driving side shaft 23 is applied to the rotary cylinder as a driving rotation shaft for the transverse feed mechanism 15 of the seedling tray. transmission to the shaft 12, and the transmission member 2.
The gear transmission 24 is configured to change the driving speed of the seedling tray traversing mechanism 15 into two stages of high and low speeds by switching engagement between the first gear 16 and the second gear 17 of the first gear 1. There is.

In order to enable the gear transmission 24 to shift, a shifter 25 that slides the shift member 21 through a fork portion 25a is slidably mounted on the transmission case 7, as shown in FIG. At the same time, the shifter 25 is attached to the transmission lever 28 via the interlocking tool 26 and springs 27a and 27b on the protruding part of the shifter 25 from the transmission case 7 to the outside.
are linked. A ball-shaped detent 29 is provided between the shifter 25 and the transmission case 7, and is configured to be biased toward the shifter 25 by a spring 30, thereby transmitting power to the shifter 25 during sliding operation. A detent mechanism 31 is configured for positioning to the operating position. That is, the detent 29 enters the first annular groove 32a as the sliding shifter 25 moves to the low-speed transmission operation position, and the detent 29 enters the second annular groove 32b as the shifter 25 moves to the high-speed transmission operation position. It is designed so that 29 can fit inside.

An operating rod 33 for the detent 29 and an operating rod 34 for operating the operating rod 33 via a rocking interlocking device 34 are each slidably attached to the mission case 7, and the operating rod 33 is attached to the detent 29. A spring 36 is applied to the operating lever 35 to urge the operating lever 34 to come into contact with the operating lever 34 and to slide the operating lever 34 in the direction of the arrow A.
A locking mechanism 37 is configured to releasably fix the detent 31 in a state where it is engaged with the shifter 25, and this locking mechanism 37 is configured to be biased into an operating state by a spring 36. That is, as shown in FIG. 2, when the operating rod 35 is operated to the end of the sliding stroke in the direction of arrow A, the operating rod 33 engages the detent 29 into the shifter 25 due to the biasing force of the spring 36. It becomes an active state by pressing and maintaining the state. As shown in FIG. 3, when the operating rod 35 is slid in the direction of arrow B against the spring 36, the operating rod 33 releases the pressure on the detent 29, and the detent 29 is disengaged from the shifter 25. The lock is released so that the lock is allowed. And the operating rod 35
A member forming the abutting type operating portion 38 for the
The operating rod 35 is attached to the seedling tray 8 so as to move integrally therewith, and the operating rod 35 is attached only when the seedling tray 8 is at the speed change setting value near the end of the lateral feed stroke.
The operating portion 38 is arranged so that the locking mechanism 37 is unlocked by pressing in the direction of arrow B, and the gear transmission 24 is operated to shift the seedling stand 8 to the shift setting position. The detent 29 is configured so that it is permitted only in the present state, and this shift check is performed using the detent 29.

[Another example]

The operation section 38 may be attached to a member that moves together with the seedling stand 8.

[Brief explanation of drawings]

The drawings show an embodiment of the structure of the seedling feeding section in the rice transplanter according to the present invention, in which FIG. 1 is a cross-sectional view of the transverse feed mechanism of the seedling platform, FIG. 2 is a cross-sectional view of the detent mechanism in the locked state, and FIG. 4 is a sectional view of the detent mechanism in an unlocked state, and FIG. 4 is a side view of the rear part of the riding rice transplanter. 7...Mission case, 8...Seedling stand, 1
5... Seedling stand lateral feeding mechanism, 24... Gear transmission, 25... Shifter, 29... Detent, 31... Detent mechanism, 37... Lock mechanism, 38... Operation section.

Claims (1)

[Scope of utility model registration request] A structure of a seedling feeding section in a rice transplanter in which a detent mechanism 31 for positioning a shifter 25 of a gear transmission 24 to a transmission operation position with respect to a transverse feeding mechanism 15 of a seedling table is provided between the shifter 25 and the transmission case 7. a lock mechanism 3 that releasably fixes the detent 29 of the detent mechanism 31 in a state where it engages with the shifter 25;
7 is provided in a state where it is biased to the operating state, and the operating portion 38 of the abutting type for the locking mechanism 37 locks the locking mechanism 37 only when the seedling stand 8 is in the gear setting position. A structure of a seedling feeding section in a rice transplanter, which is provided in the seedling platform 8 or a member that moves integrally therewith, in a state where it is arranged so as to be operated in a released state.