JP2013021963A - Sliding part structure for seedling stand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sliding part structure for a seedling stand capable of suppressing the leakage of a lubricant stored between a sliding rail and a member on the side of a seedling stand sliding on the sliding rail in the left-to-right direction of a machine body.SOLUTION: The sliding part structure for a seeding stand includes: an elongated sliding rail 27 for guiding and moving a seedling stand 12 in the left-to-right direction, a support member 44 provided on the rear surface of the seedling stand 12 along the extending direction of the sliding rail 27, and a sliding member slidable to the sliding rail 27 and attached to the support member 44 so as to be scattered along the extending direction, and further includes: a cover body 49 arranged at least in a region between neighboring sliding members, in which a space V for storing a lubricant is formed between itself and the sliding rail 27; and press means 50 for pressing the cover body 49 against the sliding rail 27.

Description

  The present invention relates to a sliding part structure of a seedling stage including an oil supply structure that supplies a lubricant to a sliding rail surface that supports the seedling stage so as to be capable of reciprocating left and right.

The rice transplanter is provided with a sliding rail that guides and moves the seedling platform in the left-right direction, and a plurality of sliding members are attached to the support member attached to the back of the seedling platform along the extending direction of the sliding rail. The sliding member is configured to be slidable with respect to the sliding rail, and the seedling bed is configured to be capable of reciprocating left and right. Between the plurality of sliding members, the cover body is arranged in contact with the end surface of the sliding member, and the cover body and the sliding body are arranged in order to make the sliding movement of the seedling platform with respect to the sliding rail smooth. A space formed between the moving rails is filled with a lubricant (grease) (see Patent Document 1).

JP 2005-176698 A

Lubricant filled in the space formed between the slide rail and the cover body may leak to the outside through the gap between the cover body and the slide rail due to the influence of the vibration of the machine. It was.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sliding part structure for a seedling table that can suppress leakage of a lubricant held between the sliding rail and a member on the seedling table side that slides on the sliding rail in the left-right direction. Is to provide

The first characteristic configuration of the present invention is a long slide rail that guides and moves the seedling platform in the left-right direction, and a support member provided on the back surface of the seedling platform along the extending direction of the slide rail And a sliding member attached to the support member so as to be scattered along the extending direction and slidable with respect to the sliding rail, at least between the adjacent sliding members And a cover body that forms a space for holding the lubricant between the slide rail and a pressing means that presses the cover body against the slide rail.

[Effect] A sliding member is attached to the support member on the back side of the seedling base, and the sliding base slides back and forth in the left-right direction by sliding on the sliding rail. A cover body is arranged in a region between the sliding members attached in a scattered manner along the extending direction of the sliding rail, and there is a space in which the lubricant is held between the cover body and the sliding rail. Since it exists, the lubricant can be filled in the space between the cover body and the slide rail.
If the sliding member slides along the extending direction of the sliding rail while the lubricant is held in the space between the cover body and the sliding rail, the sliding member also slides between the sliding rail. The lubricant comes to be located. For this reason, a sliding member slides on a sliding rail smoothly, and the movement to the left-right direction of a seedling bed is performed smoothly.
In this configuration, further, pressing means for pressing the cover body against the slide rail is provided, so that the cover body is pressed against the slide rail by this pressing means and is in close contact with the slide rail. As a result, leakage of the lubricant held in the space between the cover body and the slide rail to the outside can be suppressed.
Thus, with the sliding part structure of this configuration, the lubricant held in the sliding part of the seedling table can be used without waste, and the frequency of filling the sliding part of the seedling table with the lubricant is reduced. it can. As a result, the durability of the sliding portion of the seedling platform is improved and maintenance work is reduced.

The second characteristic configuration of the present invention is that the cover body and the support member are arranged so as to overlap each other, and a plate spring as the pressing means is provided between the cover body and the support member. .

[Effect] As in the present configuration, the cover body and the support member are arranged so as to overlap each other, and when the leaf spring as the pressing means is provided between the cover body and the support member, the leaf spring as the pressing means is The reaction force is received from the support member provided on the back surface of the seedling table, and the cover body is pressed against the slide rail. That is, the cover body can be pressed against the slide rail only by arranging the leaf spring between the cover body and the support member. In addition, since the overall thickness of the leaf spring can be reduced relatively easily, it can be easily arranged in a narrow region between the cover body and the support member. For this reason, if a leaf | plate spring is used, a press means can be implement | achieved easily.

A third characteristic configuration of the present invention is that a through hole is provided in the leaf spring, and a lubricant injection plug attached to the cover body is inserted into the through hole.

[Function and effect] Since the sliding member and the cover body reciprocate left and right on the sliding rail, if the leaf spring is not fixed to the cover body or the support member, the position of the leaf spring is deviated from the initially installed position. There is a risk that. For this reason, it is preferable that the leaf | plate spring is being fixed to the cover body or the supporting member.
In this configuration, the plate spring is provided with a through hole, and a lubricant injection plug attached to the cover body is inserted into the through hole. That is, the leaf spring was fixed to the cover body using a lubricant injection plug attached to the cover body. For this reason, it is not necessary to separately provide a fixing means for the leaf spring, and the number of parts can be reduced. A position near the plug for injecting the lubricant between the cover body and the slide rail is a position where the lubricant tends to accumulate, and a position where the lubricant easily leaks between the cover body and the slide rail. However, since the leaf spring is disposed at such a position, the cover body is reliably pressed against the slide rail, and leakage of the lubricant from between the cover body and the slide rail can be suppressed.

According to a fourth characteristic configuration of the present invention, an engagement portion that engages with the other is provided on at least one of the side of the sliding member adjacent to the cover body and the side of the cover body adjacent to the sliding member. In the point.

[Effect] Since the sliding member attached to the support member on the back side of the seedling bed slides in the left-right direction on the sliding rail, the cover body arranged between the adjacent sliding members is As long as it moves on the slide rail following the sliding of the moving member, it may not be attached to the support member.
However, during the maintenance of the seedling planting device, the seedling platform may be retracted rearward, for example, and the sliding member may be separated from the sliding rail. In such a case, since the cover body also drops away from the sliding member, it is necessary to attach the cover body to the support member in advance as in the sliding member.

In this configuration, the cover body is not attached to the support member, but the engaging portion that engages the other of at least one of the side of the sliding member adjacent to the cover body and the side of the cover body adjacent to the sliding member. And the cover is supported by the engaging portion from both the left and right sides. Thus, when the seedling planting apparatus is maintained, the cover body is also engaged by the engagement with the sliding member by the engaging portion even when the seedling table is retracted backward, for example, and the sliding member is separated from the sliding rail. It is held by the sliding member. Therefore, the support structure for the cover body can be easily realized. Further, since a member for attaching the cover body to the support member is unnecessary, the number of parts can be reduced.

Overall side view of riding rice transplanter Top view of seedling planting device Front view of the seedling table and the vicinity of the slide rail Whole side view of seedling planting device (working posture) Whole side view of seedling planting device (non-working posture) Vertical side view of the seedling table, slide rail, cover, plug member and hose Transverse plan view around seedling table, plug member and hose Longitudinal side view of the vicinity of the sliding rail, sliding member and engaging member Seedling stand, sliding member, engaging member, cover body, exploded perspective view of sliding rail Side view of seedling planting device equipped with leveling rotor Front front view of seedling planting equipment equipped with leveling rotor

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, an engine 3 and a transmission case 4 are provided at the front part of the airframe supported by the front wheels 1 and the rear wheels 2, and a link mechanism 6 is supported at the rear part of the airframe by a hydraulic cylinder 14 so as to be movable up and down. A seedling planting device 7 is mounted on the rear part of the link mechanism 6 to constitute a riding type rice transplanter.

  As shown in FIGS. 1 and 2, the seedling planting device 7 is configured in a six-row planting type and includes a feed case 15 and three transmission cases 8. A rotation case 9 is provided on the right and left sides of the transmission case 8 so as to be freely rotatable. A pair of planting arms 10 are attached to both ends of the rotation case 9. In addition, the seedling planting device 7 is provided with a grounding float 11 and a seedling setting table 12 having a seedling setting surface 12a. The feed case 15 is supported in a freely rolling manner around the front and rear axis around the rear part of the link mechanism 6. The power of the engine 3 is transmitted to the feed case 15 through a planting clutch (not shown) and the PTO shaft 18. A support frame 16 is fixed laterally laterally from the feed case 15, and three transmission cases 8 are fixed to the support frame 16 in a cantilevered manner rearward. The feed case 15 and the three transmission cases 8 are connected to each other by transmission shafts 17 that are horizontally oriented.

  The power of the engine 3 is transmitted from the PTO shaft 18 to the feed case 15, and from the feed case 15 to the transmission shaft 17, the transmission case 8, and a transmission chain (not shown) disposed inside the transmission case 8. Is transmitted to. When the rotary case 9 is driven to rotate, the planting arms 10 alternately take out the seedlings from the seedling setting table 12 and plant them on the rice field.

  As shown in FIG. 1, a feeding mechanism 19 is fixed to the rear side of the driver seat 5 below a hopper 20 that stores fertilizer. Growers 21 for forming grooves on the lateral sides of seedlings (planting strips) planted by the planting arm 10 are provided corresponding to the respective planting strips. A blower 23 for supplying high-pressure wind to the hose 22 is provided below the driver seat 5. Fertilizer is supplied from the blower 23 to the groove forming device 21 through the hose 22 by high-pressure wind, and the fertilizer is fed into the groove formed on the rice field by the groove forming device 21.

  The lateral feed mechanism of the seedling bed 12 will be described. As shown in FIGS. 2, 3, and 4, a long slide rail 27 that guides and moves the seedling table 12 in the left-right direction is supported across the three transmission cases 8. The lower part of 12 is supported by the slide rail 27. The left and right support frames 28, 28 extend upward from the left and right side portions of the support frame 16 positioned on the front side of the transmission case 8, and the support frame 29 is attached over the upper portions of the left and right support frames 28, 28. ing. A roller 31 is supported by a rod 30 fixed to a plurality of locations of the support frame 29 so as to be rotatable about an axial center in the vertical direction. A support frame 32 having a U-shaped cross section is fixed along the back surface of the upper part of the seedling base 12, and a roller 31 is inserted inside the support frame 32. Thus, the seedling bed 12 is supported so as to be reciprocally movable in the left-right direction along the slide rail 27.

  As shown in FIGS. 2 and 4, a lateral feed spiral shaft 33 extends from the feed case 15 to one side, and its extended end is rotatably supported by a bracket 35 erected from the support frame 16. doing. A feed member 34 is fitted on the spiral shaft 33. A support frame 36 is fixed over the entire width of the seedling platform 12 on the back surface near the bottom of the seedling platform 12 (see FIG. 3). A feed member 34 fitted around the helical shaft 33 is connected to a connecting member 37 fixed to the support frame 36 via a connecting member 38. The feed member 34 is laterally fed along the spiral shaft 33 by the rotational drive of the spiral shaft 33, and the support frame 36 moves in the same direction as the feed member 34. As a result, the seedling base 12 supported by the support frame 36 reciprocates in the left-right direction along the slide rail 27.

  The vertical feed mechanism will be described. As shown in FIGS. 3 and 4, the vertical feed mechanism is configured to rotationally drive a wide feed belt 13, and the feed belt 13 is disposed on each of the seedling setting surfaces 12 a of the seedling setting table 12. A drive shaft 40 is installed below the feed belt 13, and the drive shaft 40 is rotatably supported by a plurality of support members 41 fixed to the back surface of the seedling platform 12. An input arm 40a is externally fitted to a predetermined portion of the drive shaft 40 via a one-way clutch (not shown). As shown in FIG. 2, a vertical feed shaft 43 extends from the feed case 15 in the lateral direction. An end portion of the vertical feed shaft 43 is rotatably supported by the support frame 16 via a support bracket 42, and two drive arms 43 a are fixed to the vertical feed shaft 43. The input arm 40a of the drive shaft 40 is positioned between the two drive arms 43a of the vertical feed shaft 43, and the vertical feed shaft 43 is rotationally driven by the power of the feed case 15.

  When the seedling table 12 is reciprocally driven laterally along the slide rail 27 and reaches the stroke end of the reciprocating lateral feed drive, the input arm 40a of the drive shaft 40 is brought to the position of one drive arm 43a of the longitudinal feed shaft 43. Reach. At this time, the input arm 40a of the drive shaft 40 is rotationally driven by the drive arm 43a, the feed belt 13 is rotated downward, and the seedling placed on the seedling support 12 is transferred to the seedling outlet 27e of the slide rail 27. Sent.

Next, the structure near the slide rail 27 will be described.
As shown in FIG. 4, a support rod 25 is slidably supported by a bracket 24 fixed to the lateral side surface of the transmission case 8, and a U-shaped engagement portion 25 a is fixed to the upper portion of the support rod 25. Yes. A support arm 26 that can swing and be fixed up and down around the horizontal axis P1 of the transmission case 8 is engaged with an engaging portion 25a of the support rod 25, and the position of the support rod 25 is determined by the support arm 26. .

  As shown in FIGS. 8 and 9, the slide rail 27 includes a pipe section 27 a having a quadrangular cross section and a receiving section 27 b that extends from the pipe section 27 a and extends over the entire length of the slide rail 27. Prepare. A step portion 27c is formed over the entire length of the slide rail 27 on the seedling bed 12 side above the pipe portion 27a, and on the opposite side of the seedling bed 12 above the pipe portion 27a, the slide rail 27 is formed. The rib 27d is formed over the entire length. The receiving portion 27b is formed with seedling outlets 27e for the number of planting strips.

As shown in FIGS. 3, 8, and 9, a support member 44 having a T-shaped cross section is fixed to the lower surface of the lower part of the seedling platform 12 over the entire width of the seedling platform 12. A sliding member 45 and an engaging member 46 are fixed to the support member 44 in a scattered manner in the left-right direction. The sliding member 45 includes a substrate portion 45a, a vertical wall portion 45b, two bolt holes 45c, one engagement protrusion 45d, and the like, and is integrally formed of synthetic resin. The sliding member 45 is further provided with an engaging portion 45e on the side where the cover body 49 is adjacent. The engaging member 46 is formed of a synthetic resin and has an L-shaped cross section, and includes a notch 46a and a shallow recess 46b around the notch 46a.

  As shown in FIG. 9, the engagement protrusion 45 d of the sliding member 45 is inserted into the opening 44 a of the support member 44, and the bolt 47 is inserted into one bolt hole 45 c of the sliding member 45 and the opening 44 b of the support member 44. Is inserted from below. The extending portion 41b extends below the support member 41 of the feed belt 13 and has a lower portion bent at a right angle. The extension portion 41b is placed on the upper surface of the support member 44 so that the opening portion 41c of the portion bent at a right angle of the extension portion 41b overlaps the opening portion 44b of the support member 44, and the bolt 47 Is inserted into the opening 41c of the support member 41 from below.

  As shown in FIGS. 8 and 9, a metal wear plate 59 having high wear resistance is fixed to the upper surface of the pipe portion 27 a of the slide rail 27 with screws over the entire length of the slide rail 27. With the base plate portion 45a of the sliding member 45 placed on the pipe portion 27a (sliding plate 59) of the sliding rail 27, the bolt 47 is inserted into the notch portion 46a of the engaging member 46, and the engaging portion 46 is engaged. A member 46 is attached to the upper surface of the support member 44. The nut 48 is fastened to the bolt 47, and the sliding member 45 and the engaging member 46 are fixed to the extending portion 41 b of the support member 41 and the support member 44.

  The substrate portion 45a of the sliding member 45 is placed on the pipe portion 27a (sliding plate 59) of the sliding rail 27, and the substrate portion 45a of the sliding member 45 contacts the rib 27d of the sliding rail 27 (or The vertical wall portion 45b of the sliding member 45 contacts the step portion 27c of the sliding rail 27 a little away from the rib 27d of the sliding rail 27). The engaging member 46 is in contact with the lateral surface portion and the lower end portion of the rib 27 d of the slide rail 27. Thereby, the state where the lower part (sliding member 45 and engaging member 46) of the seedling bed 12 moves with respect to the sliding rail 27 is moved upward, rightward and leftward in FIG. In this way, the lower part of the seedling bed 12 is supported by the sliding rail 27 via the sliding member 45 so as to be reciprocally movable.

  As shown in FIG. 3 and FIG. 9, a space between adjacent sliding members 45 is filled between the plurality of sliding members 45 arranged along the extending direction of the sliding rail 27 ( A cover body 49 is disposed (so as to extend over the adjacent sliding members 45). Both end portions of the cover body 49 are in contact with the end portions of the adjacent sliding members 45, and the engaging portions 45 e of the sliding member 45 are engaged with the end portions of the cover body 49. As a result, the cover body 49 is supported by the engaging portion 45e of the sliding member 45 even when the seedling platform 12 described later is in a non-working posture. The cover body 49 is composed of side portions 49A, 49B and an upper surface portion 49C that hang downward and extend in the extending direction of the slide rail 27. The side portions 49A, 49B are formed of the pipe portion 27a (slider) of the slide rail 27. It is provided in sliding contact with the moving plate 59). Thus, since the cover body 49 is formed in a channel shape with the side surface portions 49A, 49B and the upper surface portion 49C, when the cover body 49 is disposed on the slide rail 27, the cover body 49, the slide rail 27, A space V in which grease (corresponding to a lubricant) can be held is formed.

  A leaf spring 50 is disposed between the upper surface portion 49 c of the cover body 49 and the support member 44 as pressing means for pressing the cover body 49 against the slide rail 27. The leaf spring 50 is formed with a through hole 50a for fixing the position. As shown in FIGS. 6, 7, and 9, at the substantially central position of the cover body 49 (the partition portion 12 b located between the adjacent seedling placing surfaces 12 a in the seedling placing base 12), the cylindrical injection The plug 51 is inserted into the opening 49 a of the cover body 49, the through hole 50 a of the leaf spring 50, and the opening 44 c of the support member 44 in order from the lower side, and the lower end of the injection plug 51 is the lower surface of the cover body 49. Is located. An injection plug 52 (corresponding to an injection port) is fixed to the partition portion 12 b of the seedling platform 12 on the seedling surface 12 a side of the seedling platform 12. A hose 53 and a pipe 54 (corresponding to a supply path) are connected across the plugs 51 and 52 for injection. The pipe 54 connected to the injection plug 52 is bent in an L shape, and the bent portion is fixed to a bracket 54 a attached to the back side of the seedling base 12.

  A cap is attached to the injection plug 52, and grease (corresponding to a lubricant) can be supplied from the seedling surface 12 a side of the seedling platform 12 by removing the cap. The grease is supplied from the injection plug 52 to the space V between the cover body 49 and the slide rail 27 through the pipe 54, the hose 53 and the injection plug 51.

  Thus, when the grease is supplied to the space V between the cover body 49 and the slide rail 27, the grease supplied to the space V is moved when the seedling bed 12 reciprocally moves along the slide rail 27. Is applied to the sliding rail 27 (sliding plate 59). When the sliding member 45 reaches the area where the grease on the sliding rail 27 is applied (when the range of the reciprocating lateral movement of the sliding member 45 overlaps the area where the grease is applied), the sliding member 45 is also greased. As a result, the grease enters the sliding contact surface between the sliding member 45 (substrate part 45a) and the sliding rail 27 (sliding plate 59). By this grease, the sliding member 45 smoothly slides on the sliding rail 27, and the seedling bed 12 is smoothly moved in the left-right direction.

Since the leaf spring 50 is disposed between the upper surface portion 49 </ b> C of the cover body 49 and the support member 44 on the back surface of the seedling platform 12, the leaf spring 50 is separated from the support member 44 provided on the back surface of the seedling platform 12. Upon receiving the force, the cover body 49 is pressed against the slide rail 27. That is, the cover body 49 can be pressed against the slide rail 27 only by arranging the leaf spring 50 between the cover body 49 and the support member 44. The cover body 49 is pressed against the slide rail 27 by the leaf spring 50 so that the cover body 49 comes into close contact with the slide rail 27, and the grease held in the space V between the cover body 49 and the slide rail 27 is retained. Leakage to the outside can be suppressed. As a result, the grease held in the sliding portion of the seedling platform 12 can be used without waste, and the frequency of filling the sliding portion of the seedling platform 12 with grease can be reduced.

The leaf spring 50 is provided with a through hole 50a, and a grease injection plug 51 attached to the cover body 49 is inserted into the through hole 50a. That is, the leaf spring 50 is fixed to the cover body 49 using the grease injection plug 51 attached to the cover body 49. For this reason, it is not necessary to separately provide a fixing means for the leaf spring 50, and the number of parts can be reduced.
The position close to the grease injection plug 51 between the cover body 49 and the slide rail 27 is a position where the grease tends to accumulate, and is also a position where the grease easily leaks between the cover body 49 and the slide rail 27. However, since the leaf spring 50 as the pressing means is disposed at such a position, the cover body 49 is surely pressed against the slide rail 27, and grease leaks between the cover body 49 and the slide rail 27. Can be suppressed.

The posture of the seedling platform 12 is changed from a working posture in which the seedling platform 12 is supported on the slide rail 27 so as to be reciprocally movable laterally, to a non-working posture in which the lower portion of the seedling platform 12 is moved rearward and upward from the sliding rail 27. The structure to be changed will be described.
FIG. 4 shows a state in which the seedling platform 12 is set to the working posture. In order to bring the seedling platform 12 into a non-working position from this state, the left and right holding members 58 on the back surface of the seedling platform 12 are attached to the holding member 57 and the supporting member 41 provided on the support frame 36. The nut is removed from the hole 41a, the nut 48 (see FIG. 9) is sufficiently loosened from the bolt 47, the engaging member 46 is removed, the bolt 56 (see FIG. 4) is removed, and the bolt 39 constituting the lateral feed mechanism is loosened.

  Thereafter, as shown in FIG. 5, the feed member 34 and the connection member 38 are slightly rotated toward the seedling platform 12 with respect to the spiral shaft 33, and the lower portion of the seedling platform 12 is lifted upward around the pin 55, and the bolt 39 is moved to the lower end of the long hole 37 a of the connecting member 37. At this time, since the sliding member 45 is fixed to the support member 44 and the cover body 49 is supported by the engaging portion 45e of the sliding member 45, the sliding member 45 and the cover together with the lower part of the seedling bed 12 are provided. The body 49 moves rearward and upward from the slide rail 27. In this state, the left and right holding members 58 are attached across the slide rail 27 and the support member 44 to hold the seedling bed 12 in a non-working posture.

In this manner, the cover body 49 is not attached to the support member 44, and the engaging portion 45e that engages the cover body 49 is provided on the side of the sliding member 45 adjacent to the cover body 49, and the cover is covered by the engaging portion 45e. The body 49 is supported from the left and right sides. As a result, when the seedling planting device 7 is maintained, the seedling table 12 is retracted rearward and the sliding member 45 is separated from the sliding rail 27. Accordingly, the cover body 49 is held without being separated from the sliding member 45. Therefore, the support structure for the cover body 49 can be easily realized. In addition, since a member for attaching the cover body 49 to the support member 44 is not necessary, the number of parts can be reduced.

[Another embodiment]
As shown in FIG.10 and FIG.11, the leveling rotor 60 which performs a crushing process to the rice field T ahead of a planting location may be arrange | positioned in the downward front of the seedling planting apparatus 7. FIG. The leveling rotor 60 is configured in a horizontally long bowl shape, and includes a chain case 61 arranged so as to be able to swing up and down around the axis d of the transmission shaft 17 inserted through the base end of the transmission case 8, and a support arm. A horizontal shaft is supported across the front end portion of 62. The power extracted from the transmission shaft 17 is transmitted to the chain case 61, and the leveling rotor 60 is rotationally driven in the downcut direction (counterclockwise in FIG. 10). The chain case 61 and the support arm 62 are slightly lifted and biased by the left and right balance springs 63. Based on detection information from a potentiometer (not shown) that detects the height of the ground float 11 and feedback information from a potentiometer (not shown) that detects the height of the leveling rotor 60, the leveling rotor 60 is moved relative to the surface T. It is controlled to always act at a predetermined depth.

  As shown in FIG. 11, a rolling drive device 70 is provided above the rear end of the link mechanism 6. A rolling spring 72 is installed over the operation wire 71 led out from the rolling drive device 70 in the lateral direction and the left and right portions of the support frame 29. The entire seedling planting device 7 is driven and swung around the fulcrum p in the front-rear direction by operating the left and right operation wires 71 in a reciprocal manner by the electric motor. The rolling drive device 70 is linked to an inclination sensor (not shown) that detects the right / left inclination of the seedling planting device 7. When the traveling machine body tilts left and right due to the undulations and unevenness of the cultivator and the seedling planting device 7 follows and tilts, the electric motor is controlled by the tilt sensor, and the seedling planting device 7 is controlled to return to the horizontal horizontal posture. The Since the rolling spring 72 is installed between the rolling drive device 70 and the seedling planting device 7, the seedling planting device 7 is free to deform the rolling spring 72 even when the rolling drive device 70 is not operating. The rolling operation is possible, and the seedling planting device 7 follows the ground surface T on the ground surface T even if the traveling machine body is slightly inclined to the left and right.

A balance spring 73 is stretched over the rear end upper portion of the link mechanism 6 and the left and right portions of the support frame 32 at the back of the seedling base 12. When the seedling platform 12 is laterally moved, the balance spring 73 opposite to the moving direction is extended, and a rolling force due to the spring tension is applied to the seedling planting device 7, and the weight balance due to the lateral movement of the seedling platform 12 is increased. Inclination of the seedling planting device 7 due to the change is automatically prevented.

  As described above, the right and left balance of the seedling planting device 7 is adjusted using the rolling spring 72 and the balance spring 73. However, since the chain case 61 includes a transmission mechanism for the leveling rotor 60, the chain case 61 is heavier than the support arm 62. For this reason, the seedling planting device 7 tends to tilt to the left side of the machine body where the chain case 61 is located. Therefore, in the present embodiment, in order to adjust the left and right weight balance of the seedling planting device 7 including the leveling rotor 60, as shown in FIG. 11, separately from the rolling spring 72 and the balance spring 73, rolling driving is performed. A balance spring 74 is installed over the device 70 and one side of the support frame 29 (on the left side of the machine body).

[Other Embodiments]
(1) In the above embodiment, the example in which the sliding plate 59 is attached to the upper surface of the sliding rail 27 has been shown. However, the board portion 45 a of the sliding member 45 is attached to the sliding rail 27 without attaching the sliding plate 59. You may comprise so that it may mount directly on the pipe part 27a.

(2) In the above embodiment, the plate spring 50 is provided with the through hole 50a, and the injection plug 51 is inserted into the through hole 50a to fix the plate spring 50 to the cover body 49. You may comprise so that it may adhere to the cover body 49 or the support member 44 with another member.

(3) In the configuration in which the cover body 49 is supported by the engagement with the sliding member 45, the configuration in which the engaging portion 45e is provided in the cover member 49 instead of the configuration in which the engaging portion 45e is provided in the sliding member 45 is adopted. Good. Further, the cover body 49 may be separately fixed to the support member 44.

(4) In the above embodiment, the configuration in which the support member 44 attached to the back surface of the seedling platform 12 is extended to the full width in the left-right direction of the seedling platform 12 is shown. It may be configured so as to be provided only at the upper position and not at the upper position of the cover body 49. In this case, the pressing means of the cover body 49 is provided, for example, on the support member 44 positioned obliquely above the cover body 49 and presses the cover body 49 toward the slide rail 27.

(5) As the pressing means, various elastic bodies such as an expansion spring, a tension spring, and rubber can be used besides the leaf spring.

  INDUSTRIAL APPLICABILITY The present invention can be widely used for various rice transplanters configured to move a seedling platform in the left-right direction.

7 Seedling planting device 12 Seedling table 12a Seedling surface of seedling table 27 Slide rail 44 Support member 45 Slide member 45e Engaging part 49 Cover body 50 Leaf spring (pressing means)
50a Through hole 51 Plug for injection 52 Plug for injection 53 Hose 54 Pipe V Space

Claims (4)

A long sliding rail that guides and moves the seedling platform in the left-right direction; and a support member provided on the back surface of the seedling platform along the extending direction of the sliding rail;
A sliding member attached to the support member so as to be scattered along the extending direction, and slidable with respect to the sliding rail;
A cover body which is disposed at least in a region between the adjacent sliding members and forms a space for holding a lubricant between the sliding rails;
A sliding part structure of a seedling table provided with pressing means for pressing the cover body against the sliding rail.   The sliding part of the seedling bed according to claim 1, wherein the cover body and the support member are arranged to overlap each other, and a leaf spring as the pressing means is provided between the cover body and the support member. Construction.   The sliding part structure of the seedling bed according to claim 2, wherein a through hole is provided in the leaf spring, and a plug for injecting a lubricant attached to the cover body is inserted into the through hole.   The engagement part which engages with the other is provided in at least one among the side which the said cover body adjoins in the said sliding member, and the side which the said sliding member adjoins in the said cover body. The sliding part structure of the seedling bed according to one item.

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