JP4905943B2 - Corner floor soil pressing device for nursery box and setting method thereof - Google Patents

Description

  The present invention relates to a corner floor soil pressing device for a seedling box and a setting method thereof.

Conventionally, the front wall corner pressing mechanism having the front wall corner pressing body and the rear wall corner pressing mechanism having the rear wall corner pressing body are attached to the mounting plate, and the mounting plate is transported across the seedling box. The structure attached to the frame provided in the upper position of a stand is well-known.
Japanese Patent Laid-Open No. 10-313698

In the known example, the front wall corner pressing body and the rear wall corner pressing body are attached to the mounting plate so that the height can be adjusted (leveled depth) freely, and the mounting plate is mounted to the frame at a height. Adjustable height, height adjustment dial adjusts height, depth adjustment dial adjusts flat depth, height and depth are adjustable, but for any height nursery box, which adjustment Since it is unclear whether it was adjusted by means, there is a problem that adjustment is troublesome.
That is, the height of the front wall corner pressing body and the rear wall corner pressing body with respect to the seedling box can be changed by both the height adjustment dial and the depth adjustment dial, so the adjustment of height and depth is misunderstood. Incorrect operation occurs and adjustment becomes troublesome.
This application corresponds to the seedling box with different heights, while dealing with the leveling of the corner soil with different scraping depths, preventing misidentification of the height and depth adjustment, making the adjustment easy, The operability is improved.

The present invention provides an extra corner soil that accumulates in the corner of the front wall 5 of the seedling box 2 formed after leveling the upper surface of the floor soil with a rotating leveling brush at a position above the transfer stand 1 for laterally feeding the seedling box 2. A front wall corner pressing mechanism 7 having a front wall corner pressing body 15 for pressing the rear wall corner pressing body 35 and a rear wall corner pressing body 35 for pressing excess corner soil accumulated in the corner of the rear wall 4 of the seedling box 2. In the case where the rear wall corner pressing mechanism 30 is provided, the front wall corner pressing mechanism 7 and the rear wall corner pressing mechanism 30 are attached to a pair of left and right corner leveling mechanism mounting plates 11, and a corner leveling mechanism is provided. The mounting plate 11 supports a height adjustment via a height switching mechanism K that includes a cam body 54 in which a plurality of cam grooves 55 having different distances with respect to the axis of the cam mounting shaft 53 are formed. mounted for vertical movement to the plate 50, the height-adjusting support plate 50, the relative transfer table 1 of the frame 9, the height adjustment shaft The height adjustment mechanism T with 2 is obtained by a corner bed soil pressing device of nursery box mounted freely up and down.
In the present invention, the height adjusting mechanism T is configured such that a pair of left and right height adjusting support plates 50 are attached to the frame 9 by the height adjusting shaft 52, and the height adjusting shaft 52 moves up and down with respect to the frame 9. This is a corner floor soil pressing device for a nursery box attached and configured.
According to the present invention, the height switching mechanism K has a left and right cam mounting shaft 53 mounted on a height adjusting support plate 50, and the cam mounting shaft 53 is inserted through the corner flattening mechanism mounting plate 11. A cam body 54 having a plurality of cam grooves 55 formed at different distances from the axis of the cam mounting shaft 53 is fixed on both sides of the cam mounting shaft 53. When the cam body 54 is rotated by contacting the groove 55 with the lower surface of the pin 56 provided at a predetermined position above the corner leveling mechanism mounting plate 11, the corner leveling mechanism mounting plate 11. Is raised and lowered with respect to the height adjusting support plate 50 to change the height, thereby providing a corner floor soil pressing device for a seedling box configured to set the leveling depth.
In the present invention, a height adjusting support plate 50 is attached to a frame 9 fixed to the transfer table 1 for laterally feeding the seedling box 2 via a height adjusting mechanism T so that the height adjusting support plate 50 can be moved up and down. Via a height switching mechanism K, a corner leveling mechanism mounting plate 11 having a front wall corner pressing body 15 and a rear wall corner pressing body 35 is mounted vertically, and the cam body 54 of the height switching mechanism K is fixed. By engaging the pin 56 of the corner leveling mechanism mounting plate 11 with the cam groove 55 for initial setting of the height of the seedling box 2, the corner leveling mechanism mounting plate with respect to the height adjusting support plate 50. 11 is initially set, and then the corner leveling mechanism mounting plate 11 is moved up and down by the height adjusting mechanism T so that the front wall corner pressing body 15 and the height of the upper surface of the seedling box 2 to be used are The height of the rear wall corner pressing body 35 is matched, and then the switching dial 57 of the height switching mechanism K is rotated to obtain a predetermined leveling. The cam groove 55 is engaged with the pin 56 to raise the seedling so that the front wall corner pressing body 15 and the rear wall corner pressing body 35 are flattened at the corner lower than the upper surface of the seedling box 2. This is a method for setting the corner floor soil pressing device of the box.

In the invention of claim 1, once the height adjustment mechanism T is used to adjust the height of the seedling box 2, the height switching mechanism K may be adjusted to the depth of the floor soil of the seedling box 2 by the height switching mechanism K. The operability can be improved.
That is, since the height switching mechanism K varies in height within a certain range (3 to 5 mm), it is not suitable for height adjustment, and an operation mistake between the height adjustment mechanism T and the height switching mechanism K is misidentified. To prevent.
In the second aspect of the invention, if the height adjusting support plate 50 is moved up and down by the height adjusting shaft 52, the corner leveling mechanism mounting plate 11 is moved up and down in conjunction with each other. The height of the box 2 can be set easily.
In the third aspect of the invention, the height of the corner flattening mechanism mounting plate 11 is switched with respect to the height adjusting support plate 50 simply by rotating the cam body 54. Therefore, the front wall corner pressing mechanism 7 and The depth setting according to the floor soil height of the seedling box 2 of the rear wall corner pressing mechanism 30 can be easily performed.
In the invention of claim 4, the setting of the height and the depth can be simplified, and erroneous operation can be prevented.

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a transfer stand, 2 denotes a seedling box, and the transfer stand 1 transfers the seedling box 2 in the direction B. Reference numeral 3 denotes a transfer roll for transferring the seedling box 2. The transfer stand 1 has a floor soil at the corner of the front wall 5 on the front side in the transfer direction of the seedling box 2 (the floor soil A at the corner is illustrated by dots for easy understanding, and the other floor soil is by a small circle. Although shown in the figure, the front wall corner pressing mechanism 7 of the corner pressing device 6 that presses the configuration is not provided.
The lower end of the side plate 10 of the frame 9 of the corner pressing device 6 is fixed to the transfer table 1. The side plates 10 and 10 are provided with a pair of left and right corner leveling mechanism mounting plates 11 and 11 that can be moved up and down.
One end of a pair of left and right attachment arms 12 is attached to the corner flattening mechanism attachment plate 11 by a shaft 13. 13A is a mounting hole for the shaft 13.

A mounting / rotation restricting shaft 14 in the left / right direction is movably mounted on the other end of the mounting arm 12. A front wall corner pressing body 15 that presses a corner of the front wall 5 of the seedling box 2 is attached to the mounting and rotation regulating shaft 14. The front wall corner pressing body 15 is formed in a flat plate shape in the left-right direction, the front side is formed as a substantially horizontal pressing portion 16, and the front wall corner pressing body 15 is inclined so as to increase toward the rear side following the pressing portion 16. The guide surface 17 is formed.
A long hole 21 at the tip of a pair of left and right restricting arms 20 is inserted into the attachment / rotation restricting shaft 14, and a base portion of the restricting arm 20 is rotatably attached to the attachment plate 11 by a shaft 22.
That is, the restricting arm 20 is provided to hold the mounting and rotation restricting shaft 14 at a predetermined height in order to make the front wall corner pressing body 15 stand by above the floor soil upper surface.

The attachment arm 12 and the restriction arm 20 are related to each other in that the attachment / rotation restriction shaft 14 contacts the lower edge of the long hole 21 at the tip of the restriction arm 20 to hold the attachment / turn restriction shaft 14 at a predetermined height. When the mounting arm 12 pivots upward about the shaft 13, the mounting / rotation regulating shaft 14 moves up in the long hole 21 at the tip of the regulating arm 20, and when the mounting arm 12 pivots downward about the shaft 13, The front wall corner pressing body 15 descends and presses the floor soil at the corner of the front wall 5.
Reference numeral 22 </ b> A denotes a mounting hole for the shaft 22.
The corner leveling mechanism mounting plate 11 is provided with a rear wall corner pressing mechanism 30 that presses the corner of the rear wall 4. The rear wall corner pressing mechanism 30 fixes the upper part of the vertical attachment shaft 32 to the support shaft 31 in the left-right direction, fixes the attachment plate 33 to the lower part of the attachment shaft 32, and has an L-shaped side view on the attachment plate 33. A rear wall corner pressing body 35 that presses a corner of the rear wall 4 of the seedling box 2 is mounted by a shaft 36 so that the mounting height position can be changed up and down. The support shaft 31 is attached to the attachment hole 31 </ b> A of the corner flattening mechanism attachment plate 11.

A weight 37 is provided at a predetermined position of the support shaft 31, and the weight 37 urges the rear wall corner pressing body 35 to always rotate backward. Reference numeral 38 denotes a spring that urges the support shaft 31 so as to be always positioned below.
A stopper 40 is brought into contact with the rear of the mounting shaft 32. The stopper 40 waits at a predetermined position for the rear wall corner pressing body 35 that is always rotated backward by the weight 37. The stopper 40 is formed in a roller shape and is attached to the attachment shaft 41 in the left-right direction. A restriction link 42 for restricting the position of the stopper 40 is attached to the mounting shaft 41. The lower part of the one side arm 43 of the restriction link 42 is pivotally attached to the attachment shaft 41, and the upper part of the one side arm 43 is pivotally attached to the corner leveling mechanism attachment plate 11 by the shaft 44. The shaft 44 is mounted in the mounting hole 44A of the corner flattening mechanism mounting plate 11.

An upper portion of another other arm 45 of the restriction link 42 is pivotally attached to the mounting shaft 41, and a shaft 46 is attached to the lower portion of the other arm 45. The shaft 46 is attached to the corner leveling mechanism attaching plate 11. A shaft is mounted in the elongated hole 47 so as to freely move up and down.
When the pressing depth of the rear wall corner pressing body 35 is changed by the switching mechanism K described later, the stopper 40 changes the standby position of the rear wall corner pressing body 35 to change the pressing depth of the rear wall corner pressing body 35. When deeper (FIG. 8), the stopper 40 positions the rear wall corner pressing body 35 rearward than when the pressing depth is made shallower (FIG. 9).
For easy understanding, FIGS. 8 and 9 show a comparison of the front and rear positions of the rear wall corner pressing body 35, and the rear wall corner pressing body 35 of FIG. 8 and FIG. Although there is no clear difference in height, this does not limit the configuration of the present invention.
Reference numeral 48 denotes a through hole formed in the corner flattening mechanism mounting plate 11. Both ends of the mounting shaft 41 are inserted into the through hole 48 so as not to hinder the movement of the mounting shaft 41 due to the operation of the restriction link 42. It is formed as follows.

Thus, the corner leveling mechanism attaching plate 11 is attached to the frame 9 of the corner pressing device 6 provided on the transfer table 1 via the height adjusting mechanism T and the height switching mechanism K.
That is, the front wall corner pressing body 15 and the rear wall corner pressing body 35 are mounted on the corner leveling mechanism mounting plate 11, and the corner leveling mechanism mounting plate 11 is attached to the height adjusting support plate 50. The height adjustment support plate 50 is attached to the frame 9 via the height adjustment mechanism T so as to move up and down.
And the height of the front wall corner pressing body 15 and the rear wall corner pressing body 35 is adjusted according to the height of the seedling box 2 by moving the height adjusting support plate 50 up and down by the height adjusting mechanism T. Next, the height of the corner leveling mechanism mounting plate 11 is switched with respect to the height adjusting support plate 50 to set the leveling depth (pressing depth).

In the height adjusting mechanism T, a pair of left and right height adjusting support plates 50 are attached to the frame 9 by a height adjusting shaft 52, and the height adjusting shaft 52 is formed by a screw shaft and screwed into the frame. The height of the support plate 50 for height adjustment relative to the frame 9 is set. Reference numeral 51 denotes a height adjustment dial.
In the height switching mechanism K, a cam mounting shaft 53 in the left-right direction is mounted on the height adjusting support plate 50, and both ends of the cam mounting shaft 53 are outside the insertion hole 53A of the corner flat mechanism mounting plate 11. The cam body 54 is fixed to both sides of the cam mounting shaft 53. A plurality of cam grooves 55 are formed on the outer periphery of the cam body 54 so as to have different distances from the axis of the cam mounting shaft 53, and the cam grooves 55 are pins provided at predetermined positions above the corner flattening mechanism mounting plate 11. 56 abuts. Reference numeral 57 denotes a switching dial.

  The height switching mechanism K rotates the switching dial 57 and once the setting cam groove 55 is engaged with the pin 56, the corner leveling mechanism mounting plate 11 is in relation to the height adjusting support plate 50. In this state, in order to match the height of each of the front wall corner pressing body 15 and the rear wall corner pressing body 35 with the upper surface height of the edge of the nursery box 2, the corner leveling mechanism is attached. When the plate 11 is moved up and down by the height adjustment mechanism T to adjust and set the height position, and then the switching dial 57 is rotated to engage the predetermined cam groove 55 with the pin 56, the corner leveling mechanism The mounting plate 11 descends with respect to the height adjusting support plate 50 and enters a standby state.

In the figure, 13B, 31B, 44B, 47B, 48B, 53B are through holes formed in the height adjusting support plate 50.
Reference numeral 60 denotes a guide shaft, which is inserted into the through hole 61A and the through hole 61B. The guide shaft 60 guides up and down with respect to the height adjusting support plate 50 of the corner leveling mechanism mounting plate 11 together with the shaft 46 on the lower side of the other arm 45.

(Operation of Example)
Next, the operation will be described.
Since this invention is the above structure, if the seedling box 2 is supplied to the transfer stand 1, the seedling box 2 will be moved to a direction, and floor soil will be supplied by the upper floor soil supply apparatus during transfer.
The floor soil is supplied to many eyes and removed, so that the upper surface of the floor soil is leveled by a rotating leveling brush, and the rear wall 4 and the front wall 5 of the seedling box 2 are cornered. The excess corner soil accumulated in the part is pressed by the front wall corner pressing mechanism 7 of the corner pressing device 6. In addition, the transfer speed | rate of the said seedling box 2 is arbitrary with about 200-1600 boxes per hour.

The mounting arm 12 of the front wall corner pressing mechanism 7 is urged to rotate downward about the shaft 13 by its own weight or spring elasticity of the front wall corner pressing body 15, The rotation restriction shaft 14 is supported by the lower surface of the long hole 21 of the restriction arm 20 and is on standby.
In this state, the seedling box 2 is supplied to the transfer stand 1 and the floor soil is supplied, and the upper surface of the floor soil is leveled by the rotating leveling brush, or the floor soil is supplied and the floor soil is supplied by the rotating leveling brush. When the seedling box 2 having a flat upper surface is supplied to the transfer stand 1, the front wall 5 of the seedling box 2 comes into contact with the inclined guide surface 19 of the front wall corner pressing body 15. Since the nursery box 2 pushes the inclined guide surface 19 forward, the mounting arm mounting arm 12 pivots upward about the shaft 13, and the mounting / rotation regulating shaft 14 also pivots upward about the shaft 13, and the front wall corner When the pressing body 15 is pushed further forward by the seedling box 2 and the front wall 5 of the seedling box 2 passes below the pressing portion pressing portion 16 of the front wall corner pressing body 15, the front wall corner pressing body 15 is It descends under its own weight and presses the corner of the front wall 5 of the seedling box 2 to level it.

Thus, the upper rotation of the mounting shaft 32 of the rear wall corner pressing body 35 of the rear wall corner pressing mechanism 30 is restricted by the mounting shaft 41 of the restriction link 42, and the rear wall corner pressing body 35 is moved to the seedling box 2. Although it does not contact the inner top surface of the floor soil, it waits at a height that collides with the rear wall 4 of the seedling box 2.
In this state, the front wall 5 of the seedling box 2 comes into contact with the rear surface of the rear wall corner pressing body 35, and the rear wall corner pressing body 35 is advanced by the forward movement of the front wall 5 of the seedling growing box 2. Since the restriction link 42 does not act on the forward movement of the rear wall corner pressing body 35, the rear wall corner pressing body 35 is further advanced and rotated by the moving seedling box 2, and the lower end of the rear wall corner pressing body 35 is moved. Is rotated to the upper end of the front wall 5, the front wall 5 passes under the rear wall corner pressing body 35.

Then, the rear wall corner pressing body 35 rotates about the support shaft 31 due to the weight of the weight 37, and the rear wall corner pressing body 35 stands by at its original height.
Next, the rear wall corner pressing body 35 that is waiting over the front wall 5 at the set height of the floor soil upper surface abuts against the front surface (inner surface) of the rear wall 4, and as described above, the mounting shaft The rear wall corner pressing body 35 is lowered with respect to the floor soil while being in sliding contact with the front surface of the rear wall 4 by rotating the mounting shaft 32 downward. When 35 is rotated to the lower side of the support shaft 31, the rear wall corner pressing body 35 presses the corner of the rear wall 4 to the maximum to flatten it, and then moves over the front wall 5 by the same action. Get over the wall 4.

  In fact, when the front wall 5 of the seedling box 2 passes below the rear wall corner pressing body 35 of the rear wall corner pressing mechanism 30 and the seedling box 2 further advances, at this time, the front wall corner The front wall corner pressing body 15 of the portion pressing mechanism 7 presses the corner soil of the front wall 5, and the front wall corner pressing mechanism 7 is described first. In addition, for the sake of easy understanding, the explanation of the above-described operation is explained by moving the seedling box 2 of one box. However, in actual work, the seedling box 2 is continuously transferred without a gap. The rear wall 4 of the succeeding nursery box 2 moves in contact with the rear wall 4 of the subsequent nursery box 2, so that the rear wall corner pressing mechanism 30 and the front wall corner pressing mechanism 7 are connected to the rear wall 4 and the front wall. 5, the front wall corner pressing body 15 of the front wall corner pressing mechanism 7 moves upward in contact with the inner surface of the rear wall 4 and climbs over the rear wall 4 and the front wall 5 to move the front wall 5 Acts when the passes.

  Thus, the support plate 50 is attached to be vertically movable via the height adjustment mechanism T, and the front wall corner pressing body 15 and the rear wall corner pressing body are attached to the height adjustment support plate 50 via the height switching mechanism K. Since the corner flattening mechanism mounting plate 11 having 35 is mounted vertically, the height switching mechanism K rotates the switching dial 57 to temporarily engage the setting cam groove 55 with the pin 56. Then, the corner leveling mechanism mounting plate 11 is set to the highest initial setting position with respect to the height adjusting support plate 50.

Next, in this state, in order to adjust the heights of the front wall corner pressing body 15 and the rear wall corner pressing body 35 to the height of the upper surface of the edge of the nursery box 2, the corner leveling mechanism mounting plate 11 is used. The height adjustment mechanism T is moved up and down to adjust the height position, and the initial setting of the height of the corner leveling mechanism mounting plate 11 is completed.
Next, the leveling mechanism mounting plate 11 is moved up and down by the height adjustment mechanism T, and the height of the front wall corner pressing body 15 and the rear wall corner pressing body 35 is set to the upper surface height of the seedling box 2 to be used. Match.

Next, when the switching dial 57 of the height switching mechanism K is rotated and the cam groove 55 having a predetermined leveling depth is engaged with the pin 56, the corner leveling mechanism mounting plate 11 becomes the height adjusting support plate. 50, the front wall corner pressing body 15 and the rear wall corner pressing body 35 are set to a flat standby height that is lower than the upper surface of the nursery box 2 (FIG. 10).
For easy understanding, the rear wall corner pressing body 35 on the right side of FIG. 10 is illustrated in a state of being rotated to the maximum leveling position.

  Even if the seedling box 2 has the same height, when the floor soil supply depth is different, the cam body 54 is rotated by the switching dial 57. For example, when the floor soil is shallow, the cam attachment shaft 53 is rotated. When the pin 56 is engaged with the cam groove 55 close to the bottom, the entire corner leveling mechanism mounting plate 11 is lowered with respect to the height adjusting support plate 50, and conversely, the floor soil is deep and the upper surface of the nursery box 2 is deep. When the pin 56 is engaged with the cam groove 55 far from the cam mounting shaft 53, the corner leveling mechanism mounting plate 11 ascends relative to the height adjusting support plate 50, and the leveling position is reached. Adjust (depth).

In the embodiment, a 0 mm cam groove 55 having the same height as the upper surface of the seedling box 2, a cam groove 55 descending 7 mm from the upper surface of the seedling box 2, the 10 mm cam groove 55, and the 12 mm cam groove 55, The cam groove 55 of 15 mm is formed and selectively engaged to switch the depth position.
Therefore, since the seedling box 2 normally uses the same height, if the height is first set by the height adjusting mechanism T, the depth is switched by the cam groove 55 of the height switching mechanism K. It only needs to be changed to improve operability.

In this case, the front wall corner pressing body 15 and the rear wall corner pressing body 35 are set when the switching cam groove 55 is set after the 0 mm cam groove 55 having the same height as the upper surface of the seedling box 2. About 1 mm from the depth is positioned higher than the upper surface of the floor soil so that the flat floor soil upper surface is not dragged by the front wall corner pressing body 15 and the rear wall corner pressing body 35.
For example, when the cam groove 55 is lowered by 7 mm, the front wall corner pressing body 15 and the rear wall corner pressing body 35 are actually lowered by 6 mm from the upper surface of the seedling box 2, and the flat floor soil upper surface and the front wall corner pressing body are flattened. 15 and a rear wall corner pressing body 35 are provided with a margin by forming a gap of about 1 mm.

The corner floor soil pressing apparatus whole side view. The schematic exploded perspective view. The side view of the board for a corner leveling mechanism attachment. Side view of the frame The side view of the support plate for height adjustment. Height adjustment state side view. The height switching state side view. The side view of a regulation link. The action state figure when raising the board for same corner part flattening mechanism attachment. The action state figure of a cam body. The action state figure when a front wall passes. The action state diagram of a flat state. Rear wall corner pressing body moving state side view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Transfer stand, 2 ... Seedling box, 3 ... Transfer roll, 4 ... Rear wall, 5 ... Front wall, 6 ... Corner pressing device, 7 ... Front wall corner pressing mechanism, 9 ... Frame, 10 ... Side plate, 11 DESCRIPTION OF SYMBOLS: Plate | board for corner leveling mechanism attachment, 12 ... Mounting arm, 14 ... Mounting and rotation control shaft, 15 ... Front wall corner pressing body, 16 ... Pressing part, 17 ... Inclination guide surface, 20 ... Control arm, 21 ... long hole, 22 ... shaft, 30 ... rear wall corner pressing mechanism, 31 ... support shaft, 32 ... mounting shaft, 33 ... mounting plate, 35 ... rear wall corner pressing body, 36 ... shaft, 37 ... weight, 40 ... Stopper, 41 ... Mounting shaft, 42 ... Restriction link, 43 ... One side arm, 44 ... Shaft, 45 ... Other side arm, 46 ... Shaft, 47 ... Long hole, 48 ... Through hole, 50 ... Support for height adjustment Reference numeral 52: height adjusting shaft 53: cam mounting shaft 54: cam body 55: cam groove 56: pin 57: switching dial

Claims (4)

Before pressing the excess corner soil accumulated in the corner of the front wall 5 of the seedling box 2 formed after leveling the upper surface of the floor soil with a rotating leveling brush at the upper position of the transfer stand 1 for laterally feeding the seedling box 2 A front wall corner pressing mechanism 7 having a wall corner pressing body 15 and a rear wall corner having a rear wall corner pressing body 35 for pressing excess corner soil accumulated in the corner of the rear wall 4 of the seedling box 2. In the case where the pressing mechanism 30 is provided, the front wall corner pressing mechanism 7 and the rear wall corner pressing mechanism 30 are attached to a pair of left and right corner leveling mechanism mounting plates 11, and the corner leveling mechanism mounting plate 11 is mounted. the upper and lower height switching mechanism K which is configured with a cam member 54 form a plurality of cam grooves 55 having different distances with respect to the axis of the cam mounting shaft 53, the height adjustment for the supporting plate 50 via mounted for movement, the height-adjusting support plate 50, the relative transfer table 1 of the frame 9, having a height adjustment shaft 52 Corner bed soil pressing device of nursery box mounted freely up and down by a height adjustment mechanism T. 2. The height adjusting mechanism T according to claim 1, wherein the height adjusting mechanism T attaches a pair of left and right height adjusting support plates 50 to the frame 9 by a height adjusting shaft 52, and the height adjusting shaft 52 moves up and down with respect to the frame 9. A corner floor soil pressing device for a seedling box that is attached to and constructed. 3. The height switching mechanism K according to claim 1, wherein the height switching mechanism K is mounted with a cam mounting shaft 53 in a left-right direction on a height adjusting support plate 50, and the cam mounting shaft 53 is used for mounting a corner leveling mechanism. A cam body 54 having a plurality of cam grooves 55 having different distances relative to the axis of the cam mounting shaft 53 is fixed to both sides of the cam mounting shaft 53, and is protruded outward from the insertion hole 53A of the plate 11. The cam groove 55 of the cam body 54 is brought into contact with the lower surface of a pin 56 provided at a predetermined position on the upper part of the corner flattening mechanism mounting plate 11. A corner floor soil pressing device for a seedling box configured to set the leveling depth by moving the mechanism mounting plate 11 up and down relative to the height adjusting support plate 50 and switching the height. A height-adjusting support plate 50 is attached to a frame 9 fixed to the transfer table 1 for laterally feeding the seedling box 2 via a height-adjusting mechanism T, and the height-adjusting support plate 50 is provided with a height switching mechanism. A corner flattening mechanism mounting plate 11 having a front wall corner pressing body 15 and a rear wall corner pressing body 35 is mounted up and down through K, and the seedling box 2 of the cam body 54 of the height switching mechanism K By engaging the pin 56 of the corner leveling mechanism mounting plate 11 with the initial height setting cam groove 55, the height of the corner leveling mechanism mounting plate 11 with respect to the height adjusting support plate 50 is increased. Next, the leveling mechanism mounting plate 11 is moved up and down by the height adjusting mechanism T, and the front wall corner pressing body 15 and the rear wall corner are set to the upper surface height of the seedling box 2 to be used. The height of the pressing body 35 is matched, and then the switching dial 57 of the height switching mechanism K is rotated so that the cam has a predetermined leveling depth. 55 is engaged with the pin 56, and the corner of the seedling box is set so that the front wall corner pressing body 15 and the rear wall corner pressing body 35 are leveled to the lower corner than the upper surface of the seedling growing box 2. Setting method of floor soil pressing device.

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