JPH0430243B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a seedling rack lateral transport mechanism that reciprocates a seedling rack in the lateral direction by using a spiral groove, and a lateral transport mechanism for the seedling rack. This invention relates to the structure of a seedling supply section in a rice transplanter equipped with a gear transmission for the mechanism.

[Conventional technology]

The rice transplanter described above is configured to change the amount of seedlings taken in the lateral direction of the seedling tray by changing the drive speed of the seedling tray lateral feeding mechanism by changing the speed of the gear transmission.

Conventionally, in this seed rice transplanter, a speed change check is performed so that the speed change operation can only be performed when the seedling table is located near the end of the lateral feed stroke and the shift gear member is at a specific rotational position. For example, there was one shown in Japanese Patent Publication No. 57-18449. That is, as shown in FIG.
A first state in which the free end portion is located on the side surface of the member 42 that moves and rotates integrally with the rotating member 42 and a second state in which the free end portion is located on the outer peripheral side of the rotating member 42 are provided so as to be swingable. When the seedling tray 8 is located between the left and right lateral feed stroke ends, the member 43 that moves together with the seedling tray 8 is separated from the stopper operating tool 44 or 45, and the stopper 27 is moved as shown in FIG. is maintained in the first state by a spring 46, and the shift gear member 22 is prevented from sliding from the transmission position by contacting the side surface of the rotating member 43. When the seedling stand 8 is at the set speed change position near the end of the traverse stroke and the shift gear member 22 is at the specific speed change rotation position, the moving member 43 is moved to the stopper operating tool 44 or 45. By abutting and pressing the stopper 27, the stopper 27 enters the second state, and as shown in FIG. By being in the aligned state, the shift gear member 2
2 sliding operations are now possible. This shift check configuration had the following disadvantages.

[Problem that the invention seeks to solve]

That is, in order to smoothly switch the direction of lateral feeding of the seedling tray, as shown in FIG. The part 49 connecting with the part 48 becomes a curved groove, and the intermediate position E of this connecting part 49 becomes the end of the traversal stroke of the seedling tray, and the final seedling picking position P _o on the forward side of the seedling tray, and ,
A seedling tray lateral feed stroke S exists between the first seedling picking position _P1 on the return side of the seedling tray where the speed should be changed and the seedling tray lateral feed stroke end. For this reason, when changing the speed of the gear transmission, the stopper 27 is operated to the outside from the rotating member 43 as shown in FIG. In some cases, the shift gear member 22 was switched before reaching a predetermined specific rotational position for shifting.

An object of the present invention is to enable the speed change of the gear transmission to be performed without causing a timing shift in the shift gear operation, regardless of the movement of the seedling stand caused by the curved connection portion of the spiral groove. be.

[Means for solving problems]

The characteristic configuration of the present invention is that, in the structure of the seedling supply section in the rice transplanter described above, a releasably stopper that prevents the shift gear member of the gear transmission from sliding from the transmission position is biased to a deactivated state. a first cam part that receives and supports the stopper in an operating state, a rotating cam that operates the stopper by acting on the stopper or a member interlocked therewith; and a first cam part that receives and supports the stopper in an operating state; and a second cam portion that allows switching to the seedling stand horizontally feeding mechanism, with the second cam portion positioned only at one point in a specific phase in the circumferential direction, A releasable check member is provided in a state where it is biased to an operating position and prevents the rotating cam from operating the stopper to the deactivation state by receiving the stopper or a member interlocked therewith, and The seedling rest is arranged such that the contact-type operating part is arranged so as to press the restraining member to the action release position only when the seedling rest is at the end of the traversal stroke and a speed change position in the vicinity thereof. Or, it is provided in a member that moves integrally with this, and its functions and effects are as follows.

[Effect]

When the seedling stand is at the position where it reaches the speed change position near the end of the lateral feed stroke, the contact type operation part is removed from the check member, the check member is in the operating position, and the second cam part of the rotating cam Regardless of whether it is opposed to the stopper or a member interlocking therewith, the stopper is in an active state and prevents the shift gear member from shifting, and the seedling stand is in the shift position and the shift gear member is in the shift gear position. When the check member is in the specific rotation position for the rotation, the check member is in the release position due to the pressing operation by the contact type operation part, and the second cam part of the rotary cam acts on the stopper or a member interlocked therewith. As a result, the stopper is brought into a disengaged state, allowing the shift gear member to perform a speed change operation.

The check member, which is operated by contact with the seedling stand or a member that moves together with it, acts by contact with the stopper or a member linked thereto, and is operated by a rotating cam. By enabling or disabling the operation of the stopper to the deactivated state and not directly operating the stopper to the deactivated state, it is possible to prevent seedlings from being placed on the helical groove due to the curved connection part mentioned above. Do not operate the stopper even if the table is moved.

〔Effect of the invention〕

The stopper is operated to the deactivation state only when the seedling stand is in the gear shifting position and the shift gear member is in the specific rotational position for gear shifting. Since the stopper is not operated regardless of the lateral movement near the end of the lateral feed stroke, the above-mentioned shift check failure will not occur, and the desired speed change check will be performed with high accuracy, and the amount of seedlings taken will be changed. This made it possible to do so without causing problems with the later supply of seedlings.

〔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 rod 16 that connects these interlocking rods 15a, 15b, a cylindrical shaft 17 that can freely rotate relative to the seedling resting bed transverse feed shaft 14 while connected to the seedling resting stage 8 so as to move integrally therewith. , and the transmission case 5 slidably via the bearing 18.
At the same time, the feeder 19 of the seedling resting table lateral feeding shaft 14 is rotatably attached to the cylindrical shaft 17 with the protrusion 19a entering the spiral groove 14a of the seedling resting table lateral feeding shaft 14, and the seedling resting table Lateral feed mechanism 41
has been configured. 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. The transmission shaft 24 for the planting arm is integrally rotatably and slidably attached to the planting arm transmission shaft 24, thereby forming a gear transmission 25 capable of two-speed transmission for the seedling bed traversing mechanism 41.

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, the gear transmission 25 is shifted by a sliding operation of the shift gear member 22 by a shift operating tool 40 which is interlocked with the shifter 38, the shifter support shaft 26, and a pair of springs 39a, 39b. 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 2 acts on the shift gear member 22 via the shifter support shaft 26 and the shifter 38.
7. Operation arm 27a of this stopper 27
The cylindrical shaft 1 is operated so as to swing the stopper 27 around the axis of the stopper rotation support shaft 28.
The rotary cam 29 is integrally and rotatably attached to the rotary cam 2 and acts on the stopper operation arm 30 that is integrally and rotatably extended from the rotary support shaft 28.
9, a releasable check member 31 that prevents the stopper 27 from being operated to the released state, a spring 33 that swings and biases the stopper 27 and the stopper operation arm 30, and an operation rod portion 32 of the check member 31. A speed change check mechanism 3 that can freely operate the gear transmission 25 to release the gear transmission 25 and is biased to the working state by each of the springs 34 that bias the check member 31 to the working position ON.
It consists of 5. That is, when the restraint member 31 is in the operating position ON, the restraint member 31 operates the stopper operation arm 30 away from the cylinder shaft 17 against the spring 33 and supports the stopper as shown in FIG. and stopper operation arm 30
operates the stopper 27 so that the free end side enters the movement path of the plate 36 attached to the shifter support shaft 26 and is not operated by the rotary cam 29, and moves the shift gear member 22 to the high-speed position. Alternatively, the stopper 27 acts on the plate 36 to prevent sliding operation from a low speed position. Then, the check member 31 is in the action release position.
When it is slid to OFF ₁ or OFF ₂ , as shown in FIGS. 4 and 5, the check member 31 comes off from the stopper operating arm 30, and the stopper operating arm 3
0 is operated by the spring 33 to the side approaching the cylinder shaft 17, and the stopper 27 is moved by the rotating cam 29.
When the feeder 19 is located at a rotational position other than the set rotational position for gear shifting, the operation arm 27a moves toward the rotational cam 2 as shown in FIG.
When the stopper 27 is in an operating state in which the free end side enters the movement path of the plate body 36, it disables the shift gear member 22 from sliding. Only when the feeder 19 is operated to the set rotation position for
As shown in FIG. 5, the free end side of the operating arm portion 27a enters the second circumferential cam portion 29a provided at a specific phase in the circumferential direction of the rotary cam 29, and the stopper 27 is moved against the plate body 36. The shift gear member 22 is switched to the deactivated state in which it is out of the movement path, thereby allowing the shift gear member 22 to slide.

As shown in FIG. 1, a pair of arm-type operation parts 37a and 37b for the restraining member 31 are connected to the pair of interlocking rods 15a and 15b so as to move together with the seedling stand 8. It is prepared for 37th. One of the operating portions 37a is operated only when the seedling tray 8 is at or near the end of the left traversal stroke, and the other operating portion 37a is operated only when the seedling platform 8 is at or near the end of the lateral feeding stroke on the right. 37b are arranged so as to contact the operating rod portion 32 and operate the check member 31 to the action release position OFF ₁ or OFF ₂ , and the seedling rest 8 is placed near the end of the horizontal feed stroke on the left or right side. is in the set speed change position, and the feeder 1
The gear transmission 25 can be operated to change the speed only when the gear transmission 9 is in the speed change setting circuit position. Specifically, the check portion only occurs when the protrusion 19a is present in the curved portion 49 that connects the seedling tray forward side portion 47 and the seedling tray backward portion 48 of the spiral groove 14a as shown in FIG. 31
is operated to the action release position OFF ₁ or OFF ₂ , and the stopper 27 is operated to the action release state only when the protrusion 19a is located at the first seedling picking position _P1 of the seedling tray forwarding side portion 47. be.

[Another example]

The rotary cam 29 may be arranged so as to act on a member interlocking with the stopper 27, or may be interlocked with the member constituting the seedling platform traversing mechanism 41 without being directly attached thereto.

The check member 31 may be configured to act directly on the stopper 27.

The operation section for the check member 31 may be provided directly on 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 front view of the lateral feeding mechanism of the seedling tray, FIG. 2 is a sectional view of the variable speed check mechanism, and FIGS. Figure 5 is a partially cutaway side view of the speed change check mechanism, Figure 6 is a partially cutaway side view of the seedling supply section, Figure 7 is a side view of the entire riding rice transplanter, and Figure 8 is a side view of the end of the spiral groove. It is an explanatory diagram. FIG. 9 is a schematic diagram of a conventional speed change check mechanism, and FIGS. 10 to 12 are explanatory diagrams of a conventional stopper. 8... Seedling stand, 22... Shift gear member,
25... Gear transmission, 27... Stopper, 29... Rotating cam, 29a... Second cam part, 29b... First cam part, 31... Checking member, 37... Member, 37a, 37b... ...Contact type operation part, 41...Seedling tray traversing mechanism, ON...Active position, OFF ₁ , OFF ₂ ...Action release position.

Claims (1)

[Claims] 1. A seedling tray lateral transport mechanism 41 that reciprocates the seedling tray 8 in the horizontal direction by using the spiral groove 14a;
and a structure of a seedling feeding section in a rice transplanter that is provided with a gear transmission 25 for the seedling bed lateral feeding mechanism 41, which prevents the gear transmission 25 from sliding from the transmission position of the shift gear member 22. Freely releasable stopper 2
7 is provided in a state where it is biased to a deactivated state, and a rotary cam 29 that operates the stopper 27 by acting on the stopper 27 or a member interlocked therewith receives and supports the stopper 27 in the deactivated state. The first cam portion 29b and the stopper 2
The seedling stand is moved laterally in a state in which the second cam portion 29a that allows switching to the action release state of No. The stopper 27 or a member 3 that is interlocked with the mechanism 41 and is interlocked with the stopper 27
A releasable check member 31 that prevents the rotary cam 29 from operating the stopper 27 to the deactivated state by receiving the 0 is provided in a state where it is biased to the working position ON, and the check member 31 is brought into contact with the check member 31. The operation parts 37a and 37b of the formula are operated so as to push the restraining member 31 to the action release positions OFF ₁ and OFF ₂ only when the seedling tray 8 is at the end of the traverse stroke and the shift position in the vicinity thereof. A structure of a seedling feeding section in a rice transplanter, which is provided on the seedling platform 8 or a member 37 that moves integrally therewith in the arranged state.