JP2010195562A - Seedling culture box stacking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that as seedling culture boxes applied with a series of sowing work are stacked when the seedling culture boxes are stopped, an impact is applied, and bed soil and covering soil may be displaced, thus causing an obstacle to efficiency and high speed. <P>SOLUTION: The seedling culture boxes conveyed by a conveyance roller 16 are abutted on a leaf spring member 26 at a conveyance terminal end E. The leaf spring member 26 smoothly absorbs the impact by sliding and moving a lower end thereof on a fixed member and elastically deforming its curved part. When lifting the seedling culture boxes by lifting mechanisms 27, 30, 31, the leaf spring member biases the seedling culture boxes so that they are abutted on a front end regulating plate 21 over an entire lifting stroke. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a nursery box stacking apparatus that stacks the seedling boxes and easily transports them to the next step after performing various operations such as sowing, irrigation, and soil covering on the seedling boxes placed in the floor soil. More particularly, the present invention relates to a stacking device that stacks a seedling box for individual farmers so as to lift upward.

  Conventionally, the present applicant has developed a seedling box stacking device that sequentially stacks seedling boxes that are sequentially transported by a transporting device (see Patent Document 1).

  The seedling box stacking device is disposed at the end of various working devices such as a seeding device, a irrigation device, a soil covering device, and a soil finishing device, which are arranged along the conveying device, and interrupts each work by discharging the seedling box. Therefore, the seedling boxes that are continuously sown can be stacked, and the work efficiency can be improved.

Japanese Patent Publication No. 61-9208

  Recently, it has been required to increase the efficiency and speed of each work such as sowing to seedling boxes and covering soil, and the speed of the seedling boxes carried into the stacking device by the transport device tends to increase. While a series of operations of the seedling box can be performed continuously such as floor soil, irrigation, sowing and covering soil, the stacking operation of the seedling box is an intermittent operation. The speed needs to be increased at a higher speed than other operations, and in the series of operations of the seedling box, the conveying speed of the stacking device is important for speeding up and increasing efficiency.

  The seedling box transported to the stacking device is stopped by operating the limit switch. However, if the carry-in speed is high, an impact is applied to the seedling box when it is stopped, and the impact causes floor soil, covering soil, etc. May move forward, and there is a risk of hindering proper nursery box work in which the seedling box is covered with floor soil, sowing and covering soil.

  Then, this invention aims at providing the seedling box stacking apparatus which absorbed the impact which arises in a seedling box smoothly when a seedling box is carried in and stopped by the stacking apparatus, and solved the subject mentioned above. To do.

The present invention includes a conveying member (16) for conveying the nursery box (19) from the carry-in part toward the terminal part (E),
Detecting means (71, 72) that is disposed at the end portion and detects that the seedling box (19) has been transported to the end portion;
A lifting mechanism (27, 30, 31, 46) for lifting the transported seedling box by a predetermined amount by detection of the detection means;
A holding member (25, 57) for holding the raised seedling box in a position where the predetermined amount is lifted,
In the seedling box stacking device (7) in which the seedling boxes that are sequentially conveyed are lifted by the lifting mechanism so as to push up the seedling boxes that are already held by the holding member, and the seedling boxes are stacked,
An impact absorbing member (26) that abuts on the seedling box (19) conveyed from the carry-in part and that smoothly elastically deforms and reduces the impact when the seedling box stops is disposed at the terminal end (E). did,
It is in the seedling box stacking device characterized by this.

  The impact absorbing member is a leaf spring member (26) whose longitudinal direction is the longitudinal direction and whose center is curved toward the upstream side in the transport direction.

  The plate spring member (26) has an upper end portion (26a) rotatably supported by a fixing member (22, 65) by a support shaft (66), and a lower end portion (26c) slidingly contacting the fixing member (67). It is supported so as to be movable in the vertical direction.

  The support shaft (66) that supports the upper end portion (26a) of the leaf spring member (26) is fixed by a long hole (65a) so as to be movable in the transport direction.

The lifting mechanism includes at least two shafts (27, 27) arranged at a predetermined interval in the transport direction, and a plurality of rollers (not shown) that are rotatably supported by the tips of arms (30) fixed to these shafts. 31 ...)
The shaft (27) rotates based on the detection of the detection means (71) and moves the rollers (31 ...) in parallel to lift the seedling box (19),
When lifting the seedling box, a regulation plate (21...) That regulates the front end on the upstream side in the transport direction of the seedling box,
When lifting the seedling box (19) by the lifting mechanism, the leaf spring member (26) biases the regulation plate (21 ...) while supporting the seedling box by the roller (31 ...). And positioning.

The holding member includes a plate (25...) Erected so as to restrict both side surfaces of the raised nursery box (19), and a holding member attached to the plate so as to be able to protrude and retract inward. A piece (57),
The holding piece (57) has a lower end portion (57a) rotatably supported by the plate (25), and an inclined portion (inclined so as to protrude inward of the left and right plates (25) upward). 57b) and a support part (57c) that extends outward from the upper end of the inclined part and can support the seedling box (19), and is immersed in the plate side by the seedling box in the lifting process by the lifting mechanism Then, when the lifting is completed, it projects inward and the bottom of the seedling box is supported by the support portion (57c).

  In addition, although the code | symbol in the said parenthesis is for contrast with drawing, it has no influence on the structure described in the claim by this.

  According to the first aspect of the present invention, when the seedling box conveyed to the end portion stops, the seedling box comes into contact with the impact absorbing member and absorbs its kinetic energy by elastic deformation of the impact absorbing member. And stop smooth. As a result, the floor soil, covering soil, etc. of the seedling box are not displaced by impact, and the seedling box can be maintained in an appropriate state and stacked at a high speed. It is possible to increase the efficiency of sowing work in seedling boxes.

  According to the second aspect of the present invention, since the shock absorbing member is composed of a leaf spring member that is curved toward the upstream side in the transport direction, the seedling box elastically deforms the curved portion of the leaf spring member. Since the leaf spring member has a longitudinal direction in the vertical direction, the urging force can be applied to the seedling box corresponding to the lifting stroke of the seedling box by the lifting mechanism. Furthermore, since the leaf spring member is inexpensive and robust, it can be manufactured at low cost and its performance can be maintained over a long period of time.

  According to the third aspect of the present invention, since the upper end portion of the leaf spring member is rotatably supported by the support shaft and the lower end portion is slidably contacted so as to be movable in the vertical direction, the impact of the seedling box is soft and long. Can be absorbed with a stroke.

  According to the fourth aspect of the present invention, the support shaft of the upper end portion of the leaf spring member can be fixed by adjusting the conveying direction position by means of a long hole, so that the contact state of the leaf spring member with the seedling box, its shock absorbing stroke, The spring constant, etc. can be adjusted appropriately according to the feeding speed of the nursery box, etc., and it can be readjusted to an appropriate value even when the spring constant of the leaf spring member changes due to use. It is possible to maintain the shock absorption of the nursery box over a long period of time.

  According to the present invention of claim 5, when the seedling box is lifted by the lifting mechanism, the seedling box is supported by the rollers of the lifting mechanism so as to be movable in the transport direction, and is formed by the lifting mechanism by the plate spring member that is long in the vertical direction. During raising, the front end portion is biased so as to abut against the regulation plate, and the seedling boxes are accurately stacked with the front end portions aligned.

The side view which shows the whole series of working machines (seeding machine) to a seedling box. The perspective view which shows a seedling box stacking apparatus. The perspective view which shows the state by which the seedling box was conveyed. The perspective view which shows the state by which the seedling box was stacked. The side view which shows a seedling box stacking apparatus. The side view which shows the state by which the seedling box was conveyed. The side view which shows the state which lifts a seedling box. The side view which shows the state by which the seedling boxes were stacked. The front view which carried out the cross section of the seedling box stacking apparatus partially. The front view which carried out the partial cross section which shows the state which lifts a seedling box. The front view which carried out the partial cross section which shows the state by which the seedling box was further lifted. The perspective view which shows the termination | terminus part of a seedling box stacking apparatus. The side view which shows a termination | terminus part. The side view which shows the termination | terminus part of the state by which the seedling box was conveyed. The side view which shows the termination | terminus part of the state which lifts a seedling box. The perspective view which shows the termination | terminus part by embodiment changed partially. The side view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a seeding machine H that continuously performs a series of operations on a seedling box. In FIG. 1, a seeding device 2 and a irrigation device are sequentially transferred from the upstream side to a continuous conveying system 1 in a straight line. 3. Earthing (covering) device 4, earth finishing device 5 for leveling the soil, soil inside the edge of the nursery box (difficulty with the soil finishing device 5), cornering device 6, and nursery box stacking device 7 is arranged.

  As shown in FIGS. 2 and 5, the seedling box stacking device 7 has two parallel frames 13 and 13 supported by legs 12 with adjusters 11, and is supported across the left and right frames 13. Conveying rubber rollers (conveying members) 16 are fixed to a plurality of shafts 15. A plurality of seedling box guides 17 are fixed along the left and right frames 13. A roller 20 for a conveyor belt 18 (see FIGS. 3 and 4) is supported via a mounting arm 14 on the upstream side of the frame 13 on the upstream side of the nursery box stacking device 7, and a guide roller 24 is rotatable. It is supported by. Thus, the seedling box is sowed and leveled by each of the devices 2, 3, 4, 5, 6 while being transported by the transport belt 18, and is then transported and transported to the stacking device 7 by the transport rubber roller 16. At this time, the conveyance rubber roller 16 rotates at a higher speed than the conveyance speed of the conveyance belt 18 and conveys the seedling box at a high speed.

  The left and right frames 13 are provided with regulation plates 21 and 21 for regulating the upstream front end surface of the seedling box via the bracket 28 with an interval h that can pass through the seedling box 19. A termination plate 22 is disposed at the downstream end E of the stacking device 7 in the conveyance direction. The termination plate 22 rises on the upstream side in the conveyance direction to prevent mud adhesion. 23 is fixed. Adjacent to the front end restricting plate 21 and the end plate 22 of the left and right frames 13 are respectively stacked plates (side restricting plates) 25..., And the seedling box 19 has its front end at the front end restricting plates 21, 21. The left and right ends are restricted by four stacked plates 25... And the rear ends are urged (restricted) by plate spring members 26 and 26 to be described later and stacked. Further, a mounting plate 32 is erected on one frame 13 so that the height can be adjusted in the vertical direction, and a switch 33 for detecting the upper limit of the stacked seedling boxes is installed at the upper end portion of the plate 32. Yes.

  Two shafts (axes) 27 and 27 are rotatably supported on the left and right frames 13 in the nursery box stacking portion, and arms 30 and 30 having support shafts 29 at the tips are fixed to the shafts 27. In addition, stacking rollers 31 and 31 are rotatably supported on the left and right ends of the support shaft 29. Each of the stacking rollers 31 on the front end side and the terminal end side has a smooth surface, and the conveying rubber roller 16 is composed of a knurled roller having irregularities on the surface except for a part thereof. This is because the nursery box is reliably conveyed and the rim on the bottom surface of the nursery box is less likely to leave marks on the roller surface. The stacking roller 31 is formed of a smooth surface so that it is not necessary to apply a conveying force only by supporting the seedling box so as to be movable in the front-rear direction, and no trace is left on the roller surface.

  As shown in detail in FIGS. 5 and 9, a motor 35 is disposed on one frame 13, and an output shaft 35 a of the motor projects to the outside of the frame 13, and large and small sprockets 36 and 37 are provided. It is fixed. Sprockets 39 are fixed to the support shaft 15 of the conveying rubber roller 16, and a chain 40 is wound between the sprocket 39 and the large sprocket 36. The sprocket 39 'is connected to a shaft that extends through the body connecting frame pipe 41 (see FIG. 2) to the other frame. A tension sprocket 38 is urged by a spring 42 and abuts the chain 40. In the figure, 60 is a transmission cover that covers a transmission device such as a chain, and 62 is a motor case. A sprocket 43 is supported on the shaft 27 of the front end side stacking roller 31, and a chain 45 is wound between the sprocket 43 and the small sprocket 37.

  A dock clutch 46 is interposed between the sprocket 43 and the shaft 27, and a driven boss 46b of the clutch 46 is urged by a spring 48 so as to be engaged with the driving boss 46a, and a pin. 47 is planted, and the pin 47 is configured to abut on a tip cam (inclined) surface (not shown) of the clutch operating plate 49 and connect once to rotate the shaft 27 and then cut. . A solenoid 54 is fixed to a support case of the motor 35, and an operating piece 54 a of the solenoid 54 and the clutch operating plate 49 are connected via link plates 50 and 51. Therefore, when the solenoid 54 is actuated once, the clutch actuating plate 49 rotates clockwise around the fulcrum 49a via the link plates 50, 51, the clutch 46 is connected and the shaft 27 is rotated once.

  The shaft 27 extends over both the left and right frames 13 and 13, and is connected to the shaft 27 of the terminal-side stacking roller 31 via the counter gear 53, the sprocket 55, and the chain 56 outside the other frame 13. Accordingly, the shafts 27 and 27 on the start end side and the end end side rotate in the reverse direction at the same timing, and the stacking rollers 31 are rotated in parallel around the shaft 27 via the arms 30 and 30. The left and right shafts 27, the arms 30, the respective stacking rollers 31 and their one-rotation drive mechanism (46) constitute a lifting mechanism that lifts the seedling box by a predetermined amount.

  Each of the (four) stacked plates 25 is supported by a linear holding piece 57... Which is pivotable about its lower end portion 57 a as a fulcrum. And a support portion 57c extending outward from the upper end of the inclined surface, and a stopper 57d where the tip of the support portion 57c is bent. The holding piece 57 is in contact with a torsion spring 59 urging so as to protrude inward of the plate 25 at the lower end pivotally supporting portion, and the stopper 57d is in contact with the outer surface of the plate 25, The inward protruding position is restricted. The stacking plate 25 and the holding piece 57 constitute a holding member that holds the raised seedling box 19 in the lifting position.

  As shown in detail in FIGS. 12 and 13, an end plate E of the stacking device 7 is connected to an auxiliary plate 63 across the end portions of both frames 13, 13. A support shaft 66 is provided via a bracket 65 on the upper rear surface side of the provided termination plates 22, 22, and the support shaft portion is opened. An upper end portion 26a of a leaf spring member 26 made of bainite steel or the like is secured to the support shaft 66 and is rotatably supported. The leaf spring member 26 passes through the opening and is on the surface side of the end plate 22. And is suspended downward with the vertical direction as the longitudinal direction. The leaf spring member 26 is curved so that the central portion 26b protrudes toward the upstream side in the nursery box transport direction, and the suspended lower end portion 26c slides on the plate 67 attached to the frame 13 in the vertical direction. Abuts freely. The leaf spring member 26 is soft in contact with the seedling box 19 conveyed by the curved portion 26b (small spring constant), absorbs the impact of the seedling box with a relatively long stroke, and smoothly stops. To do. Furthermore, during the lifting stroke of the seedling box by the lifting mechanism, the seedling box 19 is biased toward the front end regulating plate 21. The said leaf | plate spring member 26 contact | abuts to a seedling box, and elastically deforms smoothly, and comprises the impact-absorbing member which relieve | moderates the impact when a seedling box stops.

  One end plate 22 is provided with a limit switch 71 via a bracket 70, and a triangular operating plate 72 projecting upstream of the end plate 22 in the transport direction is pivotally supported on the bracket 70. ing. The operation plate 72 is configured to operate the limit switch 71 via a pin 73, detects that the seedling box 19 has arrived at the terminal portion and has stopped, and the detection signal of the limit switch 71 The solenoid 54 is activated. The limit switch 71 and the operation plate 72 constitute detection means for detecting that the seedling box has been transported to the terminal portion.

  Next, the operation of the present seedling box stacking device 7 based on the above-described configuration will be described. The seedling box 19 sown and leveled through the devices 2, 3, 4, 5 and 6 is carried into the main stacking device 7 by the transport belt 18. Then, the speed is increased by the conveying rubber rollers 16 and guided by the seedling box guides 17 and 17 and conveyed toward the terminal end E. As shown in FIG. 3, the seedling box 19 comes into contact with the curved portion 26 b of the leaf spring member 26 before coming into contact with the end plate 22. Then, as shown in FIG. 14, the leaf spring member 26 is elastically deformed so that the lower end portion 26 c slides on the plate 67 and extends downward with the upper end portion 26 a as a fulcrum. (Shock) is absorbed and stops smoothly. Thereby, even if the seedling box 19 is transported at a relatively high speed, the soil in the seedling box 19 stops in an appropriate state without being offset.

  When the limit switch 71 detects the arrival of the seedling box 19 at the end E through the operation plate 72, the solenoid 54 is operated to extend the operation piece 54a. As a result, the operating plate 49 is rotated via the link plates 50, 51, the elbow of the pin 47 by the tip cam surface is released, and the dock clutch 46 is connected by the spring 48. Then, the rotation of the sprocket 43 based on the motor 35 is transmitted to the front end side shaft 27 and also transmitted to the end side shaft 27 via the other transmission devices 53, 55, 56, as shown in FIGS. In addition, the stacked rollers 31 are rotated in parallel around the shaft 27 via the arm 30. Further, as shown in FIGS. 7 and 11, when each of the stacking rollers 31... Rotates, the seedling box 19 is transferred from the conveying rubber roller 16 to the stacking roller 31 and each of the stacking plates (side regulating plates) 25. Is lifted upward.

  At this time, each holding piece 57... Is rotated outwardly against the spring 59 by the seedling box 19 coming into contact with the inclined portion 57 b, and the supporting portion is located near the upper end of the stacking roller 31. Corresponding to 57c, the spring 57 returns to the normal restriction position where the stopper 57d abuts the plate 25, whereby the seedling box 19 is held in the raised position. Even if the shaft 27 further rotates and each stacking roller 31 descends past the upper end position, the seedling box 19 is held at the lifted position by the support portion 57c of the holding piece 57, and only each stacking roller 31 is moved. Descend. In this state, the solenoid 54 is returned to the non-operating state, the operating plate 49 is in a normal position where it is in sliding contact with the outer peripheral surface of the boss of the dock clutch 46, and the pin 47 is tip cam (tilted) by the rotation of the driven boss 46b. In contact with the surface, the driven boss 46b moves against the spring 48, the clutch 46 is disconnected corresponding to the end of one rotation of the shaft 27, and the shaft 27 and the stacking roller 31 stop.

  Further, when the seedling box 19 is lifted by the stacking roller 31, as shown in FIG. 15, the leaf spring member 26 abuts the rear end surface of the seedling box 19 over the entire stroke, and the seedling box is moved to the front end regulating plate. The urging is performed so as to abut on 21. As a result, the seedling box 19 is supported by the stacking roller 31 so as to be movable in the front-rear direction, so that the front end is aligned by the front end regulating plate 21 and the both side ends are stacked plates (side regulating plates) 25. ... are lifted up by being aligned.

  As shown in FIGS. 4 and 8, the seedling boxes 19 sequentially loaded are sequentially stacked from the lower stage by the stacking device 7, and the upper limit switch 33 is repeated until the uppermost seedling box 19 is detected.

  Next, an embodiment that is partially changed will be described with reference to FIGS. In the present embodiment, only the attachment portion of the leaf spring member 26 is different and the other portions are the same, so the same reference numerals are given and the description is omitted.

  The mounting bracket 65 of the rear end plate 22 is formed with a long hole 65a extending in the transport (front-rear) direction, and the support shaft 66 can be moved along the long hole with a bolt and a nut and fixed at a predetermined position. It is supported by. An upper end portion 26a of the leaf spring member 26 is supported on the support shaft 66 so as to be rotatable and prevented from being pulled out.

  Accordingly, the leaf spring member 26 according to the present embodiment adjusts the position at which the seedling box 19 starts to contact the leaf spring member 26, the shock absorption stroke, the spring constant, and the like by adjusting the upper end mounting position in the front-rear direction. can do. Thereby, at the time of product shipment, it can be adjusted according to the individuality of each stacking device and according to the conveying speed, and adjusted to the optimum mounting position of the leaf spring member 26 before shipment. Further, by adjusting at the time of maintenance, the leaf spring member can be adjusted in accordance with the secular change or the conveyance speed.

7 Nursery box stacking device 16 Conveying member (conveying rubber roller)
19 Nursery box 21 (front end) regulating plate 22 fixing member (end plate)
25 (Stacking) plate 26 Shock absorbing member (leaf spring member)
27 Shaft
30 Arm 31 (Stacking) roller 57 Holding piece 57a Lower end 57b Inclined portion 57c Support portion 65 Fixing member (bracket)
65a Long hole 66 Support shaft E End part

Claims (5)

A transport member for transporting the nursery box from the carry-in part toward the terminal part,
A detecting means arranged at the end portion and detecting that the seedling box is transported to the end portion;
A lifting mechanism for lifting the transported seedling box by a predetermined amount by detection of the detection means;
A holding member that holds the raised seedling box in a position where the predetermined amount is lifted,
In the nursery box stacking device in which the nursery boxes that are sequentially conveyed are lifted by the lifting mechanism so as to push up the seedling boxes that are already held by the holding member, and the nursery boxes are stacked,
In the terminal portion, an impact absorbing member that abuts on the seedling box transported from the carry-in part, and elastically deforms smoothly and relaxes the shock when the seedling box stops, is disposed.
A nursery box stacking device characterized by that. The impact absorbing member is a leaf spring member having a vertical direction as a longitudinal direction and a center portion curved toward the upstream side in the transport direction.
The nursery box stacking device according to claim 1. The plate spring member has an upper end supported rotatably on a fixed member by a support shaft, and a lower end supported in a sliding manner on the fixed member so as to be movable in the vertical direction.
The nursery box stacking device according to claim 1. The support shaft that supports the upper end of the leaf spring member is fixed to be movable in the transport direction by a long hole.
The nursery box stacking device according to claim 3. The lifting mechanism has at least two shafts arranged at a predetermined interval in the transport direction, and a plurality of rollers rotatably supported at the tips of arms fixed to the shafts,
The shaft rotates based on the detection of the detection means and moves up and down the plurality of rollers in parallel to lift the nursery box,
When lifting the seedling box, equipped with a regulating plate that regulates the front end portion on the upstream side in the transport direction of the seedling box,
When the nursery box is lifted by the lifting mechanism, the nursery box is urged and positioned by the leaf spring member while supporting the nursery box with the roller.
The seedling box stacking device according to any one of claims 2 to 4.

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