JPS608650Y2 - Mechanism for changing the horizontal feed amount of the seedling stand in a rice transplanter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mechanism for changing the horizontal feed of a seedling stand in a rice transplanter.

Conventionally, when planting seedlings with a rice transplanter, the amount of seedlings removed in the lateral direction is set by one movement of the planting claw provided in the seedling planting section and the amount of lateral movement of the seedling platform. If you want to change the amount of seedlings taken depending on the planting conditions, you can increase or decrease the amount of seedlings taken by setting the rotational speed of the planting claw at a constant speed and changing the horizontal feed amount of the seedling stand. It is something that

In order to avoid excess or deficiency in the amount of seedlings taken at the beginning and end of the lateral movement of the seedling table, the amount of lateral movement is determined by the number of operations of the planting claw performed during one operation of the seedling table. It is set to a value divided equally by an integer), and is set so that the seedling picking operation of the planting claw is always performed at the start and end of the lateral movement, and the above two settings are established before and after the switching operation. It is something that must be done.

However, conventional switching mechanisms do not take such positional relationships into consideration, and therefore, when switching, the seedling platform is stopped at the starting end or the terminal end, and only the planting claws are operated idly, and when the seedling mounting position matches the seedling picking position. A complicated operation is required to operate the switching mechanism to interlock the two, and furthermore, the interlocking of the switching mechanisms is not necessarily established when the above positions match, so the above operation has to be repeated several times. There were times when I didn't get it.

In such a switching mechanism, necessary and sufficient conditions are necessary to perform the seedling picking operation at a constant lateral movement amount, and to ensure that the planting claw performs the seedling picking operation when the seedling platform is at the start and end of the lateral movement. As, the number of operations of the planting claw performed during one lateral movement is an integer, and the relative position of the interlocking of the seedling platform and the planting claw is a position equal to the amount of lateral movement of the seedling platform. It is sufficient to set the planting claw so that it performs the seedling picking operation, and if the above two conditions are satisfied before and after the switching, the switching operation and the rice planting work before and after it will be performed without any problems. .

Therefore, in this proposal, in order to satisfy the first condition, two sets of gear mechanisms each having an appropriate gear ratio and being switchable are interposed in the interlocking mechanism of the planting claw and the seedling stand, In order to satisfy the second condition, the above gear mechanism is configured to be in constant mesh, and the switching mechanism in the mechanism can be disconnected at any time, but the input and output parts of the switching mechanism are constant for continuation. This configuration is possible only when in a relative position.

In other words, in this proposal, an engine is mounted in the front, a seedling stand is provided at the rear, and a seedling planting part is provided at the lower front of the seedling stand.
An intermediate shaft interlocked with the seedling planting part and a horizontal feed screw screw installed horizontally at the bottom of the back of the seedling platform are used to move the seedling platform in the left and right directions via a volume switching clutch attached to the end of the screw pestle. In a rice transplanter configured so that the lateral movement speed of the seedling stand can be changed by operating the clutch, the rice transplanter is configured such that the lateral movement speed of the seedling platform can be changed by operating the clutch. A plurality of gears provided on the part are always meshed, and the gear on either the intermediate shaft or the lateral feed screw is configured to freely rotate, and a locking receiver is connected to the idle gear. Moreover, a quantity switching clutch is interposed between the idle gear and the intermediate shaft or lateral feed screw that supports the gear, and the operation of the clutch allows the planting between the starting end and the ending end of the seedling stand. When the seedling platform is located at a position where the horizontal movement of the seedling platform is equally divided by the number of planting operations of the claw, and the planting claw is in the seedling picking position, the locking receiver and the amount switching clutch are activated. A quantity switching clutch is configured to engage the clutch, and by operating the clutch, power is continuously applied from the intermediate shaft to the horizontal feed screw through one of the plurality of gears, and the rotational speed of the horizontal feed screw is changed to load seedlings. This invention relates to a mechanism for changing the amount of lateral feed of a seedling platform, characterized in that the amount of seedlings taken can be increased or decreased by changing the speed of horizontal movement of the platform.

To explain the embodiment shown in the drawings, A is the main body of the rice transplanter, in which an engine 2 is mounted on the front part of the machine base 1, and a seedling loading stand 3 with a low front and rear height is provided at the rear. A seedling planting section 5 having planting claws 4 is provided at the lower front of the aircraft 3, a running wheel 6 is provided at the center, a center float 7 is provided at the bottom of the body, and side floats 8 are provided on both sides of the center float 7. It has 8.

9 is an operating handle, and 10 is a spare seedling stand.

Reference numeral 11 denotes a seedling platform horizontal feeding mechanism provided at the lower part of the rear surface of the seedling platform 3, in which a horizontal feeding screw 12 is horizontally supported on a machine frame 13, and a sliding screw 14 screwed onto the screw punch 12 is connected to A cross-feeding shaft 15 is provided, and both ends of the cross-feeding shaft 15 are protruded from the back surface of the seedling mounting stand 3, and the receivers are in contact with a plate 16.

Reference numerals 17 and 17 denote support members installed horizontally on the back side of the seedling stand 3, and sliding receivers supported on the machine frame 13 are fitted into the support members 17 and 17.

Then, by the rotation of the horizontal feed screw 12, the horizontal feed shaft 15 is reciprocated in the lateral direction via the sliding screw 14.
By pressing the plate 16, the supports which are in contact with both ends of the support member 17 are slid onto the sliding supports, thereby reciprocating the seedling stand 3 in the lateral direction.

Therefore, the seedling platform 3 physically moves back and forth horizontally with the sliding screw 14, and the amount of movement is equal to the length of the equal pitch portion of the horizontal feeding screw 12.

In addition, loop threads are provided on the outer sides of both ends of the above-mentioned pitch portion, and the sliding screw 14 is guided by the threads to reverse the sliding direction, and furthermore, the threads are used to attach the seedlings. In addition to absorbing the inertia of the table 3, the table 3 is moved laterally during the seedling picking operation at the starting end and the terminal end, so that the seedling picking operation at the same end is aligned with that at the middle part.

Further, an upward arm 40 is removably connected to the upper end of the support frame 13' which is connected to the machine frame 13 and supports the sliding receiver, and is attached to the distal end of the thoracotomy 40 above the support member 17. Opposite pin 4
By providing the support member 17 in a protruding manner, the support member 17 and the sliding receiver can be prevented from coming off, and the seedling stand 3 can be supported reliably.

Reference numeral 18 denotes a rotation mechanism for the lateral feed screw 12 provided inside the machine frame 13, and the lateral feed amount switching mechanism 19 of the present invention is interposed between the rotation mechanism 18 and the lateral feed screw 12. be.

The rotation mechanism 18 is connected to a sprocket shaft 21 which is connected to a gear 2 from a planting mission section 20 via a seedling planting section 5.
2, a transmission gear 23 that meshes with the gear 22 is provided on the intermediate shaft 24, a small transmission gear 25 and a large transmission gear 26 are provided on the intermediate shaft 24, and a switching gear 25' that meshes with the transmission gear 25 and 26. , 26' are loosely fitted into the horizontal feed screw 12, and the gear ratio of each gear 25, 25' and 26, 26' is such that the planting claw 4 operates the number of times it should be divided into equal parts. In the meantime, the transverse feed screw 12 is set at a gear ratio that provides a rotational speed that allows the seedling platform 3 to be moved laterally once.

A fixed engagement clutch 27 is connected to the switching gear 25 in the axial direction of the horizontal feed screw 12 and in the direction of rotation.
The switching mechanism 19 is interposed between ' and 26'.

On both end surfaces of the clutch 27, locking bodies 27' are provided.
27'' is provided protrudingly, and the same locking body 27'.

27'', bodies 25'-1 and 26'-1 are provided on the inner surfaces of the switching gears 25' and 26', respectively, and are engaged with the locking bodies 27' and 27''. Uke is body 25'-i
, 26'-1 means that they slip each other to absorb the remaining fraction of the transverse feed amount of the seedling table 3 that cannot be divided into equal parts due to the change of the transverse feed amount, and after slipping by the same fraction, the seedlings after switching are The locking bodies 25'-1, 26'-1 should be in positions where the amount of lateral movement of the seedling platform 3 is equally divided by the number of planting operations of the planting claw 4 between the start end and the end of the platform 3. and switching clutch 27
After that, the number of planting operations after switching is performed during the horizontal movement of the seedling platform 3.

That is, the locking bodies 27', 27'' of the clutch 27 are the locking bodies 25'-1, 26'-1 of the switching gears 25', 26'.
The ridges and troughs that should be engaged are arranged one by one so that the ridges and troughs will only engage at a certain relative position during one rotation. Therefore, the horizontal feed screw 12 does not rotate, and the seedling platform 3 remains in a stopped state, but the switching gear 25',
26' continues to rotate, so the seedling platform 3 and the horizontal feed screw 12 do not engage until they are relatively at the above-mentioned integral multiple position, and from this point on, the lateral movement of the seedling platform 3 after switching starts. is what starts.

The reference numeral 28 in the figure is a switching operation lever for the clutch 27. A bearing boss 29 is provided at the base end, an operating shaft 30 is loosely fitted into the boss 29, and a length is bored in the circumferential direction of the bearing boss 29. Insert the pin 31 protruding from the operating shaft 30 into the hole 31',
The rotation of the operating shaft 30 accompanying the rotation of the operating lever 28 is transmitted through a certain range of play.

Reference numeral 33 denotes an arm provided at the tip of the operating shaft 30. A pin 34 provided at the tip of the thoracotomy 33 is inserted into a groove 35 provided on the outer peripheral surface of the clutch, and by rotation of the arm 33, the pin 34 is inserted. is moved back and forth, and as the pin 34 moves, the clutch 27
is configured to slide back and forth in the axial direction.

36 is a spring interposed between the tip of the operating lever 28 and the machine frame 13.

Therefore, when changing the amount of seedlings taken, please use the operating lever 2.
8, the operating shaft 30 is rotated through the play of the pin 31, and the arm 33 provided on the same shaft 30 is rotated.
4 in the horizontal direction, and the clutch 27 is moved by the same pin 34.
This slides in the axial direction.

Then, the clutch 27 is pressed against the switching gear by the tensile force of the spring 36 that has crossed the fulcrum, and the locking receiver provided on the switching gear ensures that the clutch 27 is at a constant engagement position during one rotation of the body.
7 and the locking receiver can be engaged with the body and can maintain the engaged state even after engagement.

Therefore, when the clutch 27 is operated to the left and one of the locking receivers engages the body 25'-1 and the locking body 27',
In this engaged state, the lateral feed screw 12 is connected to the small gear 25,
It rotates at a low speed via the switching gear 25' and the clutch 27, and the amount of lateral feed is small.

Then, when the seedling platform 3 reaches the starting and ending ends of the horizontal movement, the planting claws 4 have just come to the seedling picking position.

Next, if you want to change the horizontal feed amount to a large amount because it is necessary to change the horizontal seedling removal amount depending on the planting conditions, use the operating lever 2.
8 is operated at any time to slide the clutch 27 to the right, the locking body 27' and the retainer are first disengaged from the body 25'-1, and the horizontal feed screw 12 is rotated. stops.

However, since the clutch 27 is biased to the right by the spring 36, the locking body 27'' tries to engage with the body 26'-1, but as mentioned above, the seedling stand 3 is It engages only at a position that is an integral multiple of the feed amount and at an appropriate position where the planting claw 4 is at the seedling picking position.Moreover, since the seedling platform 3 is stopped, the locking receiver is not engaged with the body. 26'-1 slips until it matches the above-mentioned relative position, and the slip absorbs the remaining fraction that cannot be divided into equal parts due to the change of the traverse feed amount, and the seedling table 3 is moved from the starting or ending point to which it will go from now on. The lateral movement of the seedling platform 3 will be restarted from a position that is an integral multiple of the lateral movement amount calculated backward as .

Therefore, the first amount of seedling removal immediately after the switching operation is performed using the above-mentioned fractional lateral feed amount, and thereafter, the seedling removal is performed using the accurate lateral feed amount after the switching operation.

Further, as the other side of this embodiment, the switching gears 25' and 26' are fitted to the intermediate shaft 24 in an idle rotation state, and the switching gear 2
A switching clutch 27 is slidably fitted between 5' and 26', and the switching gear 25',
The same effect as described above can also be achieved by fixedly fitting the small speed change gear 25 and the large speed change gear 26, which are respectively fitted to 26'.

Since the present invention is constructed as described above, unlike conventional methods, the lateral feed amount can be changed at any time, and no skill is required for the operation, and there is no risk of misalignment in the seedling picking position. There is no risk of problems such as seedlings being left behind, and the switching work can be carried out smoothly, which has the effect of improving work efficiency.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the rice transplanter, Figure 2 is a plan view showing the transverse feed amount switching mechanism of the seedling stand in the proposed rice transplanter, and Figure 3 is a side view of the rice transplanter.
The figure is an enlarged plan view of the same main part, Figure 4 is a side view of Figure 3, and Figure 5 is a side view of Figure 3.
The figure is a view taken along the line XX in FIG. 4, and FIG. 6 is a partially enlarged view of FIG. 1. A: Rice transplanter main body, 3: Seedling stand, 11: Horizontal feed mechanism, 12
: Lateral feed screw punch, 19: Lateral feed amount switching mechanism, 25, 26
: Transmission gear, 25', 26': Switching gear, 25'-1
: Locking receiver is body, 26'-1: Locking receiver is body, 27: Clutch, 27', 27': Locking body.

Claims (1)

[Scope of utility model registration request] An engine is mounted on the front, a seedling platform 3 is provided at the rear, a seedling planting section is provided at the lower front of the seedling platform 3, an intermediate shaft 24 is connected to the seedling planting section, and a seedling platform 3 is provided. A cross-feeding screw pestle 12 suspended horizontally at the lower part of the rear surface of the seedling platform 3 is interlocked to move the seedling platform 3 back and forth in the left and right directions through a quantity switching clutch 27. In a rice transplanter configured to be able to change the lateral movement speed of the platform 3, a plurality of gears provided on the intermediate shaft 24 and a plurality of gears 25' and 26' provided at the end of the lateral screw punch 12 are used. Always meshed and intermediate shaft 2
4 or the horizontal feed screw 12 is configured to freely rotate, and the idle gear is provided with locking receivers 25'-1, 26'-.
1 are connected in series, and a quantity switching clutch is interposed between the free rotation gear and the intermediate shaft or lateral screw screw supporting the same gear, and the locking receivers 25'-1, 26'- 1 and the amount switching clutch 27, the seedling mounting table 3 is generated by switching the lateral feed amount.
After slipping to absorb the remaining fraction of the amount of lateral movement, the number of planting operations of the planting claw 4 from the starting end of the lateral movement of the seedling platform 3 to the rear end of the lateral movement is The seedling platform 3 is configured to be positioned at a position where the amount of lateral movement of the platform 3 is equally divided, and by operating the clutch, power is continuously applied from the intermediate shaft to the lateral feed screw via one of the plurality of gears. A mechanism for changing the amount of lateral feed of a seedling platform in a rice transplanter, which is configured to increase or decrease the amount of seedlings taken by changing the rotational speed of a lateral feed screw to change the speed of movement of the seedling platform in the left and right directions.