JPH0837826A - Device for pushing out seedling of transplanter - Google Patents

Abstract

PURPOSE:To surely push out seedlings with soil without damaging a seedling tray even in somewhat shift of push rods from the through holes of pot parts. CONSTITUTION:In a device for pushing out seedlings of a transplanter in which pot parts 10 having through holes 12 on the bottom are formed protrusively to the back side of a seedling tray 11, the back side of the seedling tray 11 is equipped with push rods 18 passing through the through holes 12 so as to put the push rods in and out from the pot parts 10 and seedlings 14 with soil packed in the pot parts 10 are pushed out to the surface side of the seedling tray 11 by the advance and retreat movement of the push rods 18, guide parts 20 for conducting the tip parts of the push rods to the through holes 12 are formed at least at either the tip parts of the push rods 18 or the bottom parts of the pot parts 10. The bush rods 18 are equipped with play means 21 for allowing the tip parts of the push rods 18 to displace in the outer direction of the rod diameter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling extrusion device for a transplanter for transplanting pot seedlings (soiled seedlings) such as vegetables.

[0002]

2. Description of the Related Art For example, in a transplanter for upland fields for transplanting soil-bearing seedlings, a seedling tray in which a large number of pot portions are vertically and horizontally arranged so as to project to the back side is provided for intermittent vertical feed, On the back surface side of this seedling tray, a push rod passing through a through hole provided at the bottom of the pot portion is provided so as to be able to move in and out of the pot portion.

Conventionally, the push rod pushes the seedlings with soil loaded in the pot portion to the surface side of the seedling tray, and then one of the seedlings is placed in a transplanting cylinder that is vertically movable via seedling delivery means. The seedlings with soil are automatically transplanted into the ridges by piercing the ridges into the ridges (see, for example, Kokai Sho 58-190).
No. 303).

[0004]

When the above-mentioned seedling tray is intermittently fed longitudinally, the seedling tray is temporarily stopped so that the through hole of the pot portion is coaxial with the push rod. The timing is adjusted so that the push rod moves in and out of the pot section. However, if the seedling tray is continuously and vertically fed, the through hole of the pot part is misaligned with respect to the push rod due to transport error and dimensional error of the seedling tray. In some cases, the seedling tray may be damaged by hitting the bottom of the pot, or the push rod may slide back and forth while rubbing the edge of the through hole of the pot, and the vibration at this time may cause the root pot of the seedling with soil to collapse.

The misalignment of the pot portion caused by the above-mentioned intermittent vertical feeding of the seedling tray causes the seedling tray to be curved and supported by the tray guide, and the push rod is pushed in and out of the curved portion of the seedling tray. If you want to do (for example, the actual public Sho 58
No. 14833). In view of such circumstances, an object of the present invention is to make it possible to reliably push out soiled seedlings without damaging the seedling tray even if the push rod is slightly displaced with respect to the through hole of the pot portion. To do.

[0006]

In order to achieve the above object, the present invention takes the following technical measures. That is, according to the present invention, a pot portion having a through hole at the bottom is formed so as to project to the back surface side of the seedling tray, and a push rod passing through the through hole on the back surface side of this seedling tray can freely move in and out of the pot portion. In the seedling extruding device of a transplanter, which is provided in the seedling extruding device, the seedling with soil loaded in the pot portion is pushed out to the surface side of the seedling tray by the push-out movement of the pushrod. At least one of the bottom portions of the portion is formed with a guide portion for guiding the tip portion thereof to the through hole, and the push rod rod is provided with play means for allowing the tip portion to be displaced in the rod radial direction. It is characterized by being.

In this case, the play means may be a first play means for elastically deformably supporting a portion of the push rod that is not inserted into the pot portion. Moreover, you may employ | adopt the 2nd play means which allows the front-end | tip part of a push rod to displace in radial direction with respect to the middle part of the said rod.

[0008]

In the present invention, the guide portions 20, 51, 56, 72
Guides the tip end portion of the push rod 18 to the through hole 12 and allows the rod tip end portion to be displaced outward in the radial direction of the rod by the play means 21, 54. Rod 18 is through hole 12
Even if the push rod 18 is slightly deviated from the position, the tip portion of the push rod 18 is appropriately guided by the guide portions 20, 51, 56, 72 so as to match the through hole 12 when the push rod 18 is projected, and the tip portion of the push rod 18 is moved to the pot portion 10. Is never pushed to the bottom.

Thereafter, the push rod 18 is attached to the pot portion 1
However, at this time, the outer peripheral surface thereof may slide on the edge of the through hole 12. In this case, if the first play means 21 that elastically deformably supports the portion of the push rod 18 that is not inserted into the pot portion 10 is adopted, the first play means 21 is elastically deformed, and therefore the edge of the through hole 12 is formed at the time of sliding. No excessive force acts.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. In FIG. 3, the transplanting machine 3 adopted in the present embodiment is of a walking type, and can freely run along the ridge 1 across the ridge 1 in the field, and the ridge 1 is covered with a mulch film.

The transplanter 3 has a front wheel 5 on one side of the front end of the traveling machine body 4 and rear wheels 6 on both sides of the rear part.
The rear wheels 6 are driven by the power of the engine 7 mounted in the central portion to travel, and a handle 8 is provided on the rear end central portion side of the machine body 4 so as to project rearward. Reference numeral 9 is a tray guide, which is provided on one of the left and right sides of the machine body 4 so that the width direction thereof faces the traveling direction of the transplanter 3. As shown in FIG. 2, this tray guide base 9 has a groove shape with a flat cross section, and a seedling tray 11 into which a large number of soil-bearing seedlings 14 are loaded.
9A has rail portions 9A that support both edge portions of the rail so as to be vertically insertable.

The seedling tray 11 is made of flexible thin plastic, and has a large number of pots 10 projecting from the back surface side (right side in FIG. 2) arranged vertically and horizontally. A circular through hole 12 is formed in the bottom of the pot portion 10,
The soil-bearing seedlings 14 loaded in each of the pots 10 are pushed out to the outside by a push rod 18 described later that passes through the through holes 12.

The tray guide 9 is curved in the left-right direction of the machine body 4, and the seedling tray 11 is curved along this curved shape.
Can be inserted. Engagement holes 11B are formed in the flange portions 11A at both edges of the seedling tray 11, and the feed claws (not shown) that are vertically swingably driven are provided in the engagement holes 1A.
By engaging with 1B, the seedling tray 11 is intermittently fed in the vertical direction.

On the back side of the curved portion of the tray guide 9 (on the right side in FIG. 2), a row of soiled seedlings 14 is stretched all at once.
A seedling pushing device 15 for pushing the seedling to the surface side (left side in FIG. 2) is provided, and the seedling pushing device 15 is configured to reciprocate for each intermittent vertical feed of the tray 11. As shown in FIG. 2, the seedling pushing device 15 includes a slider 17 having an L-shaped cross section, which is provided on a guide rail 16 extending in the seedling pushing direction so as to be reciprocally movable, and a vertical spacing between the seedling trays 11 on the slider 17. A plurality of columns (7 in this embodiment)
Book) push rod 18, a crank 13 which is rotationally driven by the engine 7 or a battery, and a crank 1.
And a link 19 for converting the rotational movement of No. 3 into the reciprocating movement of the slider 17.

A laterally long slit 9B is formed in the curved portion of the tray guide 9, and push rods 18 are arranged behind the slit 9B in parallel and at equal intervals. The roots of the push rods 18 are attached to the vertical wall portions 17A of the slider 17 in a cantilever manner so that the tips of the push rods 18 face the through holes 12 of the seedling tray 11. The crank 13 is controlled so that the seedling tray 11 is intermittently fed once and then rotated once while the vertical feeding is stopped. By the rotation of the crank 13, all the push rods 18 simultaneously move toward and away from the corresponding pot portions 10 via the links 19 and the sliders 17, and the soil-bearing seedlings 14 loaded in the pot portions 10 in a horizontal row are provided. Will be pushed out at once.

As shown in FIG. 1, the push rod 1
At the tip of 8, the same tip is provided with a through hole 12 of the seedling tray 11.
A guide portion 20 for guiding the guide rod 20 is formed, and the guide portion 20 is provided at the base of the push rod 18.
The first play means 21 for allowing the distal end portion to be displaced outward in the radial direction of the rod within a range in which the distal end portion can be guided to the through hole 12.
Is provided.

That is, the push rod 18 is formed by inserting a steel mandrel 23 into the outer cylinder 22 made of steel at intervals, and the tip of the outer cylinder 22 is rounded and tapered. The guide portion 20 having a conical shape is formed. First play means 21 of the present embodiment
Is fixed to the vertical wall portion 17A of the slider 17 and the mandrel 2
A connecting member 24 for swingably supporting the base end portion of 3 and a support cylinder 25 made of an elastic material such as rubber interposed between the connecting member 24 and the base end portion of the outer cylinder 22 are provided. .

The connecting member 24 is formed by fixing the receiving seat 27 to the front surface of the circular plate 26 and fixing the screw shaft 28 to the rear surface, and the vertical wall portion is formed by a pair of nuts 29 screwed onto the screw shaft 28. Slider 1 by holding 17A
7 is fixed. In the receiving seat 27 of the connecting member 24,
A ball portion 30 formed at the base end of the mandrel 23 is fitted, and the mandrel 23 is swingably connected to the connecting member 24 by a universal joint 31 composed of the receiving seat 27 and the ball portion 30.
Further, the plate 26 of the connecting member 24 has substantially the same diameter as the outer cylinder 22, and the support cylinder 2 fitted onto the base end portion of the outer cylinder 22.
The base end of 5 is hooked on the outer periphery of the plate 26.

Therefore, when an external force is applied to the push rod 18 in the radial outward direction, the support tube 25 made of an elastic material bends and the base of the push rod 18 bends slightly via the universal joint 31, but when the external force is released, The restoring force of the support cylinder 25 causes the push rod 18 to return to its original state in which it is substantially vertical to the vertical wall portion 17A of the slider 17.

The outer cylinder 22 and the tip of the mandrel 23 are connected to each other by fixing the tip of the mandrel 23 to the rubber seat 32 loaded inside the tip of the outer cylinder 22 as shown in the left circle of FIG. Alternatively, it can be performed by fitting the spherical portion 33 formed at the tip of the mandrel 23 into the recess formed inside the tip of the outer cylinder 22.
Particularly, in the former case, the rubber seat 32 is used as the outer cylinder 22 and the mandrel 2.
Since the misalignment between the tip portions of No. 3 is allowed, there is an advantage that the impact when the push rod 18 hits the edge of the through hole 12 of the pot portion 10 can be alleviated.

Further, in FIG. 1, the first play means 21 is provided at the base portion of the push rod 18 (the connection portion with the slider 17), but the first play means 21 is provided at the intermediate portion of the push rod 18. It is also possible. However, in this case, when the push rod 18 projects,
It is necessary to provide it in the intermediate part that is not inserted into the. Next, below the tray guide table 9, seedling feeding means 35 for supplying the pushed horizontal row of soil-bearing seedlings 14 to the transplanting cylinder 34 one by one is provided. The seedling receiving device 35A is arranged on the front surface side of the seedling tray 11 so as to be intermittently movable.

The seedling feeding means 35 includes a drive sprocket 36.
And an endless chain 38 wound around the driven sprocket 37, and a seedling receiver 35A provided on the chain 38 so as to be vertically swingable. The seedling receiver 35A is set horizontally when receiving the soil-bearing seedlings 14, but tilts downward when reaching the drive sprocket 38, whereby the soil on the seedling receiver 35A is set. The attached seedlings 14 are slid down one by one.

The transplant cylinder 34 has a parallel link 39 shown in FIG.
The soil-bearing seedlings 14 are vertically movable at a position where the soil-bearing seedlings 14 fall, and the soil-bearing seedlings 14 received at the top dead center are retained, and the soil-bearing seedlings 14 are pierced at the bottom dead center to be transplanted. In FIG. 3, 40 is a gas burner that melts and cuts the mulch film by heat prior to the transplantation cylinder 26, and 41 is a roller for pressing the soil around the transplanted seedlings. Reference numeral 42 shown in FIG. 2 is a guard for preventing the soiled seedling 14 extruded by the seedling pushing means 15 from dropping from the seedling receiving device 35A, and the seedling feeding means 3
The transparent resin plate is provided upright on the frame along the feeding direction 5.

According to the seedling extrusion device 15 of the transplanter 3,
By the rotation of the crank 13, each push rod 18 moves back and forth so as to pass through the through hole 12 of the corresponding pot portion 10, whereby the soiled seedling 1 loaded in the pot portion 10 is provided.
4 is pushed out to the surface side of the seedling tray 11. This time
A tapered guide portion 20 is provided at the tip of the push rod 18.
Since the first play means 21 supports the root portion of the push rod 18 elastically deformable,
Even if the push rod 18 is slightly deviated from the through hole 12 due to a transport error of the seedling tray 11, the push rod 1
8 is slightly bent at the root, and the tip is the guide 2
It is properly guided by 0 to match the through hole 12, and the tip of the push rod 18 is not pushed to the bottom of the pot portion 10.

After that, the push rod 18 moves while sliding the outer peripheral surface thereof to the edge of the through hole 12 of the seedling tray 11. However, since the support cylinder 25 of the first play means 21 is elastically deformed, the sliding. Occasionally, an excessive force does not act on the edge of the through hole 12, and damage to the seedling tray 11 due to such sliding is effectively prevented. Further, as the inconvenience due to the interference with the seedling tray 11 is eliminated as described above, the diameter of the tip end portion of the push rod 18 can be made substantially the same as that of the through hole 12, so that the push rod for the root pot portion 14A of the seedling 14 is pushed. 18
Since the ground contact area is increased, it is possible to prevent the root pot portion 14A from collapsing during extrusion.

FIG. 4 shows a second embodiment of the present invention. In this embodiment, the push rod 18 is a single rod body 44.
The first play means 21 differs from the first embodiment in that the first play means 21 is composed of a compression spring 45 or the like fitted in the rod body 44. That is, the first play means 21 in this case
Is a curved plate 4 formed at the base end of the rod body 44.
6 and the curved plate 46 to the vertical wall portion 1 of the slider 17.
7A, and a compression spring 45 that urges the concave portion 47 formed in 7A.

The base end portion of the rod body 44 is inserted through the vertical wall portion 17A of the slider 17 from the front side (left side in FIG. 4), and the compression spring 45 is fitted over this protruding end portion, and the compression spring 45 is fitted with a nut. The stopper plate 49 fixed by 48 is used to prevent the stopper plate 49 from coming off, so that the spherical surface portion of the curved plate 46 is pressed against the concave portion 47 having a corresponding shape.

Therefore, also in this embodiment having the first play means 21, when an external force is applied to the push rod 18 in the radially outward direction, the compression spring 45 bends to bend the bending plate 4.
Even if the base of the push rod 18 is slightly bent due to the sliding of No. 6 and the push rod 18 is slightly displaced from the through hole 12, it is properly guided into the through hole 12 when it is projected.

Further, in this embodiment, the rod body 44 has a diameter much smaller than that of the through hole 12, and a streamlined cover member 50 is fixed to the tip of the rod body. A guide portion 21 having an elliptical cross section is formed at the tip portion of the cover member 50, and an intermediate portion thereof is formed in a tapered shape whose diameter gradually decreases toward the base end side. Also,
The maximum diameter of the cover member 50 is set to be substantially the same as the diameter of the through hole 12.

When the cover member 50 is streamlined in this way, if only the maximum diameter portion of the member 50 passes through the through hole 12, then the outer peripheral surface of the cover member 50 is through hole of the seedling tray 11. It is possible to prevent sliding on the 12 edges as much as possible. FIG. 5 shows a third embodiment of the present invention. In this embodiment, a play means 21 basically having the same structure as that of the second embodiment is employed, and a mandrel 23 is fitted with an outer cylinder 22 on the outer cylinder 22. The push rod 18 similar to that of the embodiment is adopted, and the support cylinder 25 made of an elastic material such as rubber is interposed between the base end portion of the outer cylinder 22 and the bending plate 46.

Therefore, in the case of the present embodiment, both the compression spring 45 and the support cylinder 25 can be elastically deformed at the root of the push rod 18, which has an advantage that the degree of freedom of deformation of the push rod 18 can be increased. FIG. 6 shows a fourth embodiment of the present invention. In this embodiment, a second play means 54 is provided which allows the distal end portion of the push rod 18 to be displaced radially outward with respect to the rod body 53. Has been.

That is, the second play means 54 is constructed such that the tip end portion of the push rod 18 is deformed radially outward, and is made of an elastic material such as rubber fixed to the tip end of the rod body 53. It consists of an extrusion head 55. As shown in FIG. 6 (b), the extrusion head 55 integrally has a head (guide portion) 56 having an oval cross section and a columnar fixing portion 57, and a head portion between them. A neck portion 58 having a small diameter is formed so that the portion 56 can be easily deformed. A mounting hole 59 is formed in the end surface of the fixed portion 57,
The push-out head 55 is fixed to the rod body 55 by fitting a mounting pin 60 formed on the tip surface of the rod body 53 into the mounting hole 59.

The rod body 53 of this embodiment is formed to have a diameter slightly smaller than the maximum diameter of the extrusion head 55, and is directly connected to the vertical wall portion 17A of the slider 17 by a nut 61. As described above, in this embodiment, the tapered head portion 56 is formed at the tip of the push rod 18, and the extrusion head 55 (second play means 54) having the head portion 56 is formed.
6 is elastically deformable in the radial direction, the pushing head 55 passes through the through hole 12 even if the push rod 18 is slightly displaced with respect to the through hole 12, as shown in phantom in FIG. 6B. In doing so, it elastically deforms while abutting the edge of the through hole 12, so that the push rod 18 is properly guided so as to match the through hole 12 without being pushed to the bottom of the pot portion 10.

Thereafter, the push rod 18 is connected to the pot portion 1
However, in this case, when the misalignment between the push rod 18 and the through hole 12 is severe, the outer peripheral surface of the rod body 53 moves while sliding on the edge of the through hole 12. However, this sliding may damage the seedling tray 11. Therefore, as shown in FIG. 6C, it is preferable to interpose a coil spring 62 in the middle of the rod body 53. In this case, since the coil spring 62 is elastically deformed during the sliding, an excessive force does not act on the edge of the through hole 12, and the seedling tray 11 is effectively prevented from being damaged by the sliding. Thus, the coil spring 62 functions as the first play means 21.

However, the coil spring 62 must be provided in a portion of the rod body 53 which is not inserted into the pot portion 10. FIG. 7 shows a modification of the second play means 54 provided at the tip of the push rod 18. Of these, the second play means 54 shown in FIG. 7 (a) has a steel ball 65 fixed to the tip of a rubber support 64 fixed to the tip of the rod body 53.

The second play means 54 shown in FIG. 7 (b).
Is composed of a pin 66 fixed to the tip surface of the rod body 53 and a metal ball 67 with a hole inserted into the pin 66. The ball 67 is inserted into the pin 66 with play, and the ball 67 extends outward in the radial direction of the rod. It is freely movable. Furthermore,
The second play means 54 shown in FIG.
The support cylinder 68 is fixed to the bottom of the support cylinder 68, a metal ball 69 is loosely inserted into the bottom of the support cylinder 68, and a rubber spacer 70 is loaded into the support cylinder 68. Ball 6
9 is attached by loosely fitting the retainer pin 71 at the base end thereof to the bottom of the support cylinder 68, and the spacer 70 is in contact with the head of the retainer pin 71. Therefore, the ball 67 is also movable in the rod outer diameter direction.

The present invention is not limited to the configurations of the above embodiments. For example, in each of the above embodiments, the tip of the push rod 18 is tapered or a sphere is provided to form the guide portion. However, as shown in FIG. 8, the push rod 18 is provided around the through hole 12 at the bottom of the pot portion 10. Tapered part 7
By forming 2, the guide portion for guiding the rod tip portion to the through hole 12 can be configured.

Further, the present invention is not limited to the case where the soiled seedlings 14 in a horizontal row are extruded at a stretch, but, for example, in Japanese Utility Model Publication 58-1.
Seedling extrusion device of the type that pushes out the soil-bearing seedlings 14 one by one as shown in No. 90303 (hence the push rod 18
But there is only one). Furthermore,
The present invention can also be applied to a boarding type vegetable transplanter or rice transplanter.

[0039]

As described above, according to the present invention,
The guide portions 20, 51, 56, 72 are push rods 18
The play means 2 while guiding the tip of the
Since 1,54 allow the displacement of the rod tip portion in the radial direction of the rod, even if the push rod 18 is slightly deviated from the through hole 12, the soiled seedling 14 can be secured without damaging the seedling tray 11. Can be extruded into.

Further, the pot portion 10 of the push rod 18
When the first play means 21 that elastically deformably supports the portion that is not inserted into the through hole, even if the midway portion of the push rod 18 slides on the edge of the through hole 12, an excessive force acts on the edge of the through hole. Therefore, damage to the seedling tray 11 can be prevented more reliably.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of essential parts of a seedling extrusion device according to a first embodiment.

FIG. 2 is a plan sectional view of a seedling feeding device.

FIG. 3 is an overall side view of the transplanter.

FIG. 4 is a longitudinal sectional view of a main part of a seedling extrusion device according to a second embodiment.

FIG. 5 is a longitudinal sectional view of a main part of a seedling extrusion device according to a third embodiment.

6A is a longitudinal sectional view of a main part of a seedling pushing device according to a fourth embodiment, FIG. 6B is an enlarged sectional view of a tip end portion of a push rod, and FIG. 6C is a root portion of a push rod having a coil spring. FIG.

FIG. 7 is an enlarged cross-sectional view of a tip end portion of a push rod showing a modified example of the second play means.

FIG. 8 is an enlarged cross-sectional view showing a modified example of the guide portion.

[Explanation of symbols]

 3 Transplanter 10 Pot part 11 Seedling tray 12 Through hole 14 Seedling with soil 15 Seedling extrusion device 18 Push rod 20 Guide part 21 First play means 51 Guide part 54 Second play means 56 Guide part (head) 72 Guide part ( Taper part)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Moto Nishio 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Kenkichi Nosaka 64, Ishizukita-machi, Sakai City, Osaka Kubota Sakai Manufacturing Co., Ltd. In-house (72) Inventor Hitoshi Fukumoto 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd.

Claims (3)

[Claims] 1. A pot portion (10) having a through hole (12) at the bottom is formed so as to project to the back surface side of the seedling tray (11), and the through hole (12) is provided on the back surface side of this seedling tray (11).
Push rod (18) passing through the pot part (10)
The push rod (1
8) In the seedling extruding device of a transplanter, wherein the soiled seedlings (14) loaded in the pot portion (10) are pushed out to the surface side of the seedling tray (11) by the moving movement of 8). 18) tip part or pot part (1
0) at least one of the bottom portions of the guide portions (20) (51) (5) for guiding the tip of the bottom portion to the through hole (12).
6) (72) is formed, and the push rod rod (18) is provided with play means (21) (54) that allows the tip end portion of the push rod rod (18) to be displaced in the radial direction of the rod. Seedling extrusion equipment for transplanters. 2. A pot portion (1) of a push rod (18)
The seedling extruding device for a transplanter according to claim 1, further comprising a first play means (21) for elastically deformably supporting a portion which is not inserted into (0). 3. A first play means (54) for allowing the tip of the push rod (18) to be displaced radially outward with respect to the midway portion of the rod (18). The seedling extrusion device of the transplanter according to 2.