JP3523791B2 - Box pick-up mechanism in seedling box collection machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box picking mechanism in a seedling box collecting machine which hooks and lifts a seedling box developed on the ground and transfers the lifted seedling box to a transfer device of a working machine body.

[0002]

2. Description of the Related Art In seedling raising work for rice and vegetables, after germination, seedling boxes are arranged in a house (hardening house) in units of several hundred to 1,000 sheets for greening and / or hardening treatment. Mechanization technology has been developed for efficient collection within a small site. Among such techniques, as a technique for collecting seedling boxes, there is one disclosed in Japanese Patent Laid-Open No. 10-127172, which is a box pick-up mechanism that hooks and lifts the periphery of the seedling box deployed on the ground. And transfer the seedling box lifted by the box picking mechanism to a front-back transport device, transport the seedling box backward by the transport device, and store it in a multi-tiered seedling box shelf via an elevator device or the like. It was something that was done.

The box pick-up mechanism is provided with an elevating table which is vertically moved up and down via an elevating cylinder on a front frame projecting forward from the working machine body, and a hooking tool which hooks the periphery of the seedling box through the vertical cylinder on the elevating table. It is provided and configured,
In the state where the hooking tool is hooked on the seedling box, the hooking tool is lifted through the vertical cylinder and the elevating cylinder, and the carrier device is inserted under the lifted seedling box to transfer the seedling box. It was

[0004]

The hooking tool is provided with a wheel that rolls on the ground. When the wheel runs on the ground, the hooking tool is expanded and contracted by following the unevenness of the ground to extend and contract the vertical cylinder. The position of the hook with respect to the ground was maintained so that the hook could be reliably hooked to the seedling box.

However, although the above structure can cope with the height change of the ground, it cannot cope with the inclination in the left-right direction, and on the inclined ground, the left and right ends of the hooking device cannot be lifted from the ground to hook the seedling box. When such a situation occurs, it is necessary for the operator to manually perform a troublesome work such as manually hooking the seedling box on the hooking tool, which reduces the collection efficiency.

Further, in the above box pick-up device,
Since the raising and lowering cylinders and the vertical cylinders are provided to lift the seedling box, the structure is complicated and the weight becomes large, and it is necessary to increase the capacity of the driving source for driving these. Therefore, the present invention makes it possible to pick up the box reliably by following the hook not only on the height of the ground but also on the slope, and a box pick-up mechanism that makes it possible to lift the box by the hook with a simple structure. The second purpose is to provide.

[0007]

The present invention takes the following technical means in order to achieve the above object. That is,
The present invention is a box pick-up mechanism in a seedling box collecting machine, wherein the seedling box expanded on the ground is hooked and lifted by a hooking device, and the lifted seedling box is transferred to a transport device on the traveling machine body side. A mechanism frame that supports the tool, a mounting frame that supports the mechanism frame on the traveling body side, and a setting means that sets the height so that the hooking tool follows the ground. And a guide part which is provided between the mounting frame and the mechanism frame and which guides the up-down movement while allowing the mechanism frame to tilt in the left-right direction. It is a feature.

According to this, when the seedling box expanded on the ground is hooked by the hooking tool, the mechanism frame is moved up and down through the operating portion of the setting means, and at this time, the mechanism frame is moved in the left-right direction by the guide portion. Since it is guided up and down while being allowed to tilt, it is possible to cope with height changes including the inclination of the ground in the left-right direction, and the box can be reliably picked up with the hooking tool following the ground.

As the operating portion, it is possible to move the mechanism frame up and down by operating an actuator such as an air cylinder by detecting unevenness or inclination of the ground with a sensor or the like. However, it is preferable that the mechanism frame is constituted by a support member that supports the mechanism frame from below and moves the support frame up and down by following the ground.

As for the hooking device, the upper part is pivotally supported on a mechanism frame so that the traveling machine body is moved forward while the hooking device is hooked on the seedling box to move the hooking device in an arc to lift the seedling box. It is preferable that the box is lifted by the power for advancing the traveling machine body without providing an actuator such as an elevating cylinder, thereby simplifying the structure and reducing the weight.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the whole seedling box developing and collecting machine 1 which can be changed to a seedling box developing machine A and a seedling box collecting machine B as a seedling box ground processing machine. The seedling box deploying and collecting machine 1 has a configuration in which two or more seedling boxes N on each of the left and right sides are horizontally oriented and simultaneously deployed side by side and two left and right sheets are collected while forming a sidewalk in the center.

The seedling box unfolding and collecting machine 1 comprises a working unit 3
The work unit 3 is roughly divided into a deployment work unit 3A and a recovery work unit 3
B and. In the following description, the front side is the side on which the seedling box N is developed, and the working unit 3 moves backward during expansion and advances during recovery.

The unfolding work unit 3A is shown in FIGS. 1 to 7, and includes a support frame 5 attached to the main unit 4 side, and a vertical and horizontal transport mechanism (transport device) 6A having a rear portion pivotally connected to the support frame 5. , A tilting mechanism 7 that is provided on the support frame 5 side and tilts the vertical and horizontal transport mechanism 6A.
Have and. The collection work unit 3B is shown in FIGS. 1 and 8 to 11, and includes a support frame 5 attached to the main unit 4 side, a vertical and horizontal transport mechanism 6B having a rear portion pivotally connected to the support frame 5, and the support frame 5 side. The tilting mechanism 7 for tilting the vertical / horizontal transporting mechanism 6B provided on the main unit 4 side (the traveling machine body 9 side) such as the support frame 5
And a box pick-up mechanism 8 attached to the.

The supporting frame 5 and the tilting mechanism 7 of the unfolding work unit 3A and the collecting work unit 3B are common, and the vertical and horizontal transport mechanisms 6A and 6B are alternatively supported.
The box pick-up mechanism 8 according to the present invention is detachably fixed to the main unit 4 side. The main unit 4 includes a crawler-type traveling machine body 9, a box delivering means 10 arranged on the traveling machine body 9, a box elevating mechanism 11 arranged across the box delivering means 10, and a box elevating mechanism 11. The support frame 5 and the tilting mechanism 7, which are a common device of the unfolding work unit 3A and the collecting work unit 3B, are provided with a box loading / unloading mechanism 12 arranged on the rear side.
Is permanently installed in.

1 to 9, the unfolding work unit 3A
The support frame 5 common to the recovery work unit 3B is formed in a rectangular frame shape in a plan view by combining a horizontal member and a vertical member, a pair of left and right engaging portions 15 are provided at the front portion, and a stay 16 is provided at the left and right side portions. Is erected upright, is detachably fixed to the traveling machine body 9, and pivotally supports a bent portion of a tilting member 18 having a substantially L-shape in a side view via brackets 17 on the front left and right sides.

The tilting member 18 has a substantially L-shaped lower part which is arm-shaped and extends forward, and an actuator 19 such as a hydraulic cylinder is connected to the upper part. Although the actuator 19 is supported by the stay 16, the box lifting mechanism 11
It may also be supported on the frame of the arm and is extended to tilt the arm downward. The support frame 5 and the tilting member 18
The tilting mechanism 7 of the vertical / horizontal transport mechanism (transport device) 6 is configured by the actuator 19 and the like.

The support frame 5 is formed by projecting a pair of left and right plate members from the traveling machine body 9, and a tilting member 18 is provided.
Alternatively, the actuator 19 may be formed between one arm member and the support frame 5. 1 to 7
At the horizontal and vertical transport mechanism 6A of the unfolding work unit 3A
Is a conveyance frame 21A in which model steels are assembled vertically and horizontally, and the conveyance frame 2
2 sets or more in the left-right direction within 1A, for example, 5 sets of roller conveyors 22 and drive rollers 23 on the front side of the conveyance frame 21A
And a vertical conveyance means 24 formed by and a pair of front and rear horizontal conveyance means 25 arranged on the center side in the conveyance frame 21A.
A pair of left and right vertical conveying means 24 and horizontal conveying means 25 are provided, and have a bilaterally symmetrical shape with respect to the center line of the traveling machine body 9.

The pair of right and left vertical conveying means 24 are separated by the size for forming the passage L. The roller conveyor 22 of each vertical conveying means 24 employs an idle roller, and two horizontally long seedling boxes N can be placed on the front and rear of one set of roller conveyors 22, and the driving roller 23 has a conveying frame 21A. A roller 28 is provided on a rotating shaft 27 supported by a bracket 26 on the front side of the rotating shaft 27. The rotating shaft 27 is connected to the motor 3 via a transmission device 29 such as a chain transmission device on the side surface of the transport frame 21A.
It can be driven at 0.

The roller conveyor 22 may be a driving roller, but in the front conveying means 24, only the front driving roller 23 is a forward feeding driving portion. The roller conveyor 22 on the center side is located at a position where the seedling box N is carried in from the rear box delivering means 10, and a stopper (not shown) which can advance to the front is provided at the front part of the box delivering means 10. The brought-in seedling box N is designed not to fall.

At the tip of the bracket 26, there is a grounding wheel 31 which is an extension of each set of roller conveyors 22 and which can be grounded.
Is supported. The grounding wheel 31 supports the front end of the vertical conveying means 24 and also functions to push the seedling boxes N laid on the ground from the rear side to align them. The lateral conveying means 25 supports a sprocket on one central shaft 25A so as to freely rotate,
A sprocket is fixed to each of the left and right shafts 25B, a chain 32 is wound between the center and left and right sprockets, and an engaging member that engages with the seedling box N is provided on the chain 32. It is placed in the gap.

The power from the motor 25C is transmitted in the opposite direction to each of the left and right shafts 25B, and the left and right chains 32 move in the opposite direction, so that the two front and rear seedling boxes N carried in on the left and right chains 32 are moved. Push one box outwards left and right. Therefore,
The lateral transfer means 25 puts the seedling box N loaded on it in one
A predetermined number of seedling boxes N can be lined up on the vertical transport means 24 simply by pushing the boxes, and this is performed simultaneously on the left and right sides, so that the horizontal weight balance in the vertical and horizontal transport mechanism 6A is maintained well.

A pair of left and right pivot shafts 33 are provided at the lower rear portion of the transport frame 21A, and the pivot shafts 33 are engaged with the engaging portions 15 of the support frame 5 so as to be engageable and disengageable from above. It The pivot shaft 33 in the engaged state is the tilting member 18 having a substantially L shape.
It is concentric with the fulcrum of, but may be offset forward or backward or up and down. The tip of the arm portion of the tilting member 18 can freely come into contact with and separate from an abutting member 34 provided on the transport frame 21A. When the tilting member 18 is swung upward by the actuator 19, the transport frame 21A is supported by the pivot shaft 33. Lifting and swinging around the center, the vertical / horizontal transport mechanism 6A is placed in a substantially horizontal posture, and the actuator 19
And the tilting member 18 is swung downward, the transport frame 21A is lowered around the pivot 33, and the vertical / horizontal transport mechanism 6A is tilted to the front downward posture in which the ground wheel 31 is in contact with the ground.

The tilting member 1 is moved from the state where the ground wheel 31 is grounded.
When 8 is further swung downward slightly and the tilting member 18 is separated from the transport frame 21A, the vertical / horizontal transport mechanism 6A enters a floating state that follows the unevenness of the ground. The transport frame 21A
Wheels are provided at both left and right ends or in the middle of the
The weight of A may be supported by the wheels, and the ground wheel 31 may be slightly lifted from the ground. Further, the vertical / horizontal transport mechanism 6A can transport the seedling box N back and forth and laterally even on only one side thereof.

The transport frame 21A and the vertical transport means 24 of the vertical / horizontal transport mechanism 6A are folded and connected at a position substantially corresponding to the side edge of the traveling machine body 9 and a position between the position corresponding to the side edge of the traveling machine body and the outer end. The part 35 is formed, and the folding connection part 3 is formed.
5 is foldable around the front-rear axis, and the rotary shaft 27 is also connected via a universal joint at a position corresponding to the fold connecting portion 35.

By folding the left and right vertical / horizontal transport mechanisms 6A in two places in a direction in which the outer end side of the transport frame 21A is lifted upward, the working unit 3A is within the front projection area of the main unit 4, as shown in FIG. If it is a frontage that allows the main unit 4 to pass through, the whole seedling box expansion / recovery machine 1 can pass through. Left and right vertical and horizontal transport mechanism 6
In A, the left and right positions of the folding connecting portion 35 are slightly displaced,
When folded, the left and right outer parts are arranged vertically offset on the front side of the main unit 4 and do not collide.

When the width of the left-right vertical / horizontal conveying mechanism 6A is narrow, the folding connection portion 35 is formed at either the position substantially corresponding to the side edge of the traveling machine body or between the position corresponding to the side edge of the traveling machine body and the outer end. It 8 and 9, the recovery work unit 3
The vertical / horizontal transport mechanism 6B of B is a transport frame 2 in which model steel is assembled vertically and horizontally.
1B and the center side drive conveyor 37 in this conveyance frame 21B
And vertical conveying means 3 formed by the side-side drive conveyor 38
9 and two sets of lateral conveying means 40 arranged at positions overlapping the side driving conveyor 38 in the conveying frame 21B.

The center side drive conveyor 37 and the side side drive conveyor 38 are symmetrical with respect to the center line of the traveling machine body 9, but the two sets of lateral conveying means 40 are left and right displaced by one box forward and backward. The left and right center side drive conveyors 37 of the vertical conveyance means 39 transmit the power from one motor 41 by a transmission means such as a chain transmission means, and the roller shafts of the respective center side drive conveyors 37 are outside side portions. It is connected to the roller shaft of the side drive conveyor 38 via a joint so as to drive the side drive conveyor 38 synchronously.

The central drive conveyor 37 is formed to be slightly longer rearward than the side drive conveyor 38 so that the seedling box N can be carried out to the rear box transfer means 10, and the side drive conveyor 38 can be driven. A notch 42 is formed on the outer side of the tip of the conveyor 38, and the front side portion of the transport frame 21B is a side side drive conveyor 3
It does not interfere with the above-ground seedling box N that is not collected in 8.

The lateral conveying means 40 includes motors 43A and 43A.
A chain is wound around a pair of sprockets driven by B, and an engaging member that engages with the seedling box N is provided on this chain, which is arranged in the roller gap of each side drive conveyor 38. Seedling box N that was brought in on it
Is pushed onto the central drive conveyor 37 by one box. The left side seedling box N can be moved to the rear end of the left side drive conveyor 38, but the right side seedling box N is provided with a stopper 45 behind the right side lateral transfer means 40 so as not to move further backward. Has become. The stopper 45 may be fixed or movable back and forth.

The vertical / horizontal transport mechanism 6B is also the vertical / horizontal transport mechanism 6A.
Similarly, in the transport frame 21B and the vertical transport means 38, the folding connecting portion 35 is formed at a position substantially corresponding to the side edge of the traveling machine body 9, and the folding connecting portion 35 can be folded around the front-rear axis. The universal joint connecting the central drive conveyor 37 and the side drive conveyor 38 of the vertical conveying means 39 corresponds to this.

By folding the left and right vertical / horizontal conveying mechanisms 6B at one place in a direction in which the outer end side is lifted upward, as shown in FIG.
Similarly, as long as the working unit 3B is within the front projection area of the main unit 4 and has a frontage through which the main unit 4 can pass, the whole seedling box unfolding and collecting machine 1 can pass through. The box pick-up mechanism 8 to be described later is made foldable by the folding connection portion 35 or is detached from the traveling machine body 9.

In the vertical / horizontal transport mechanism 6B shown in FIG. 9, four horizontally long seedling boxes N are placed on the vertical transport means 39 at the same time on the horizontal transport means 39 and moved backward, and the right two seedling boxes N are stopped by the stopper 45. After that, the left two seedling boxes N are moved to the rear end of the transport frame 21B. Then, the two right seedling boxes N are moved to the center side by the right lateral transfer means 40, and left 2 is displaced rearward from that.
The four seedling boxes N are moved to the center side by the left side lateral transfer means 40, and a total of four seedling boxes N are arranged in the front, rear, left, and right at the center of the transfer frame 21B, and the center side drive conveyor 37 is re-driven in that state. All the seedling boxes N to the rear.

When a total of four seedling boxes N, two left and right in total, are simultaneously collected in this way, the lateral transport of the seedling boxes N on the left and right becomes substantially symmetrical, and the weight balance becomes good. 8 to 11, the box pick-up mechanism 8 can pick up four seedling boxes N in a horizontal row at a time corresponding to the vertical-horizontal transport mechanism 6B, and the box lifting mechanism 11 or the main unit 4 such as the support frame 5 can be picked up. A mounting frame 47 protruding forward from the (traveling machine body 9) side;
A front frame (mechanical frame) 51 supported on the front end of the mounting frame 47, a plurality of hooks 52 provided on the front frame 51 in the left-right direction, and the hooks 52 are forcibly flipped upward and rearward. Forced disengagement means 56 for disengaging from the box N, stopper means 57 for restricting the operation of the forced disengagement means 56, retraction means 58 forcibly releasing the stopper means 57 to retract the hook 52, and forced disengagement means 56.
Return means 59 for returning the hook to a position where the hook 52 is substantially suspended.
And a control means 65 for controlling the operation.

The mounting frames 47 are provided in a pair on the left and right with an interval corresponding to the width of the four seedling boxes N on the left and right, or two on the left and right with an interval corresponding to the width of each two seedling boxes N on the left and right.
The pair of mounting frames 47 is provided with the front frame 51 formed in the shape of a square pipe at the front end of the pair of mounting frames 47, and the front frame 51 is provided with four sets of left and right hooks 52.

The hooks 52 are loosely fitted to a support shaft 54 provided on the front frame 51 in such a manner that three of them can be independently rocked with respect to one seedling box N, and the lower portion thereof is substantially L-shaped in a side view. The hanging claw portion 52A having a shape (hook shape) is formed, and the hanging claw portion 5 is formed.
2A is substantially grounded (state B in FIG. 10), the main unit 4 moves forward, and the upper part of the main unit 4 moves forward to hook the peripheral edge Na of each seedling box N from below.

In the state where the hook 52 is caught on the seedling box N (state B in FIG. 10), since the seedling box N abuts on the front seedling box N and does not move, the hook 52 is centered on the upper part. Then, the rearward side of the seedling box N hooked by this circular arc movement is lifted up around the front side (state C in FIG. 10). That is, the hooking tool 52 lifts the seedling box N by performing an arcuate movement by the power for moving the main unit 4 forward, thereby simplifying the structure without providing a special actuator or the like.

The hook 52 is above the front of the vertical / horizontal transport mechanism 6B in the state where the seedling box N is lifted (the state of C in FIG. 10), and when the upper part of the hook 52 is further advanced from this state, a fixed angle When swinging as described above, the peripheral edge Na comes into contact with the upper portion of the hanging claw portion 52A, and the lever claw portion 52A is disengaged from the peripheral edge Na by the lever action (the angle of the hooking tool 52 at this time is defined as the natural detachment angle. 10 states), seedling box N
Is placed on the vertical and horizontal transport mechanism 6B so as to drop.

When the hook 52 is naturally detached from the lifting of the seedling box N by the natural arc movement of the hook 52 by the advance of the main unit 4 as described above, the posture of the seedling box N and the hanging claw portion 52A and the periphery thereof. It may be difficult for the hooking tool 52 to be detached only by the lever action due to a dimensional error with Na or the like. Therefore,
In the present embodiment, in order to make the detachment of the hooking tool 52 from the seedling box N more reliable, before the hanging claw portion 52A is disengaged from the peripheral edge Na by the lever action, that is, the swing angle is the natural detachment. Before the angle is reached, it is forcibly flipped up by the forcibly detaching means 56 to be detached (the angle of the hook 52 at this time is referred to as the forcibly detaching angle).

Hereinafter, the forced releasing means 56, the stopper means 57, the retracting means 58, the returning means 59, and the controlling means 6 will be described.
5 will be described. The forcibly disengaging means 56 includes a flip-up member 60 whose upper part is pivotally supported about the axis in the left-right direction with respect to the front frame 51, and whose lower end is in contact with the hooking device 52 in the hanging posture, and the flip-up member 60. And a biasing member 61 that biases the lifting member 60 in the flip-up direction.

The stopper means 57 has a stopper member 62 whose upper portion is pivotally supported around the axis in the left-right direction with respect to the front frame 51, and the lower side of the stopper member 62 is the upper side of the flip-up member 60. Energizing member 6 by engaging
The operation of the flip-up member 60 is restricted against 1. The stopper member 62 has a release lever 62A protruding rearward and downward, and can come into contact with a hooking tool 52 swinging rearward and upward. While the hooking tool 52 changes from near the forced release angle to the forced release angle. The stopper member 62 is swung to release the regulation of the flip-up member 60, and the flip-up member 60 is biased by the biasing member 6.
It can be flipped up by 1.

The stopper member 62 is urged by a tension spring 63 provided between the release lever 62A and the flip-up member 60, and a stop pin 67 regulates its swinging forward. The retracting means 58 has a release lever 58A having an upper portion fixed to a left and right supporting shaft rotatably provided on the front frame 51 side, and an arm portion 58B having a lower portion fixed thereto, and the lower end of the release lever 58A. Is the release lever 62
It is possible to engage with A from the front side. The arm portion 58B is connected to the short rotating arm 64A of the motor 64 via the link 53. The motor 64 is attached to the front frame 51 via a mount.

The release lever 58A is reciprocally rocked by the counterclockwise (reverse) rotation of the motor 64, and the release lever 62A is rocked rearward, so that the release lever 58A is rocked by the hook 52 in the same manner. The stopper member 62 is swung rearward to release the regulation of the flip-up member 60, and the flip-up member 60 is flipped up. The returning means 59 is a set lever 59 fixed to a rotating shaft supported on the front frame 51 side.
A has an A and an arm 59B, and the tip of the set lever 59A can be engaged with the flip-up member 60 from the rear side (upper side). The arm 59B is connected to a long rotating arm 64B of the motor via a link 55. It is connected.

The short rotary arm 64A and the long rotary arm 64B are formed, for example, by forming the output shaft of the motor 64 into a crank shape or by fixing arm members at both ends of the output shaft. The set lever 59A is reciprocally rocked by rotation of the motor 64 in the clockwise direction (forward rotation), rocks the flipped-up member 60 in the flipped up state, and brings the hooking tool 52 into a substantially hanging state by its own weight. Back up.

By the return swing of the flip-up member 60,
The stopper member 62 is also pulled back by the tension spring 63 to swing back, engages with the upper portion of the hook 52, and flips up the member 60.
Hold in the set position. The control means 65 detects that the controller 66, a sensor (not shown) that detects one rotation position of the motor 64, and that the hooking tool 52 is in a hanging state by the flip-up member 60 being in the set position. Second detecting the first sensor 65A and the hooking device 52 being in the flip-up state by the flip-up member 60 being in the flip-up position
And a sensor 65B.

The mechanism and action of forcibly detaching the hook 52 and returning it to the set position will be described below. The collection work unit 3B is made to face the side-by-side seedling boxes N and moved forward. At this time, the first sensor 65A causes the flip-up member 6 to
When 0 is detected or when the second sensor 65B does not detect the flip-up member 60, it is determined that the hook 22 is in the substantially hanging state a, and the working unit 3B is moved forward as it is. The motor 64 is rotated in the forward direction by one direction via the arrow to drive the return means 59 to swing the flip-up member 60 downward by the set lever 59A and operate the stopper means 57 to hold the flip-up member 60 at the set position. , The first sensor 65A. When the hooking tool 52 is set in the substantially hanging state (i), the recovery work unit 3B starts to move forward and the hooking tool 52 is dragged, and the hooking claw portion 52 thereof is provided.
A is caught in each seedling box N that had been deployed. Then, the rear part of the seedling box N is pulled up around the front end, and the hook 52 swings upward and backward around the support shaft 54 to a certain angle while drawing an arcuate trajectory, and immediately before the natural release angle, the hook 52 moves.
Contacts the release lever portion 62A of the stopper member 62 and rotates it.

When the stopper member 62 is released, the flip-up member 60 is shocked up by the elastic force of the urging member 61, and all the hooks 52 are forcibly jumped up, so that the hook claws 52 are released.
Remove A from seedling box N. As a result, the rear part of the seedling box N is dropped onto the vertical and horizontal transport mechanism 6B. In this way, the seedling boxes N are lifted by the plurality of hooks 52 corresponding to the respective seedling boxes N and transferred onto the vertical / horizontal transport mechanism 6B, and the seedling box N is completely placed on the vertical / horizontal transport mechanism 6B. After seeing, the forward button is pressed, or after the preset time has passed after the second sensor 65B detects the flip-up member 60, the motor 64 is rotated in the forward direction by one, the return means 59 is driven, and the flip-up member 60 is set by the set lever 59A. Is pushed down, the flip-up member 60 is overrun, returned to the set position, the set lever 59A is raised, and then the box pick-up mechanism 11 is made to perform the seedling box pick-up operation again.

When the backward movement button is pressed when the required seedling box N has been recovered or when the work unit 3B is moved backward for some reason, the first sensor 65A detects the flip-up member 60 or the second sensor 65A. If the sensor 65B does not detect the flip-up member 60, it is determined that the hook 52 is in the hanging state, and if the work unit 3B is moved backward as it is,
Since the hooking tool 52 in the dragged state is caught so as to bite into the ground, the motor 64 is controlled via the control unit 66.
Is reversed by 1 to drive the retracting means 58.

The short rotation arm 64A swings the release lever 58A by reverse rotation to push the release lever portion 62A of the stopper means 57, release the stopper member 62 and flip up the flip-up member 60, and all the hooks 52. Is forcibly bounced and retracted. Box picking mechanism 8 of the present invention
As shown in FIGS. 19 and 20, includes a setting means for setting the height of the hooking tool 52 in accordance with a change in height including the inclination of the ground, and the setting means guides the front frame 51 so as to be vertically movable. It is provided with a guide portion 49 for supporting it and an operating portion 48 for moving up and down the front frame 51 according to the ground.

The operating portion 48 is composed of support wheels (supporting members) provided at the left and right ends of the front frame 51 via mounting rods, and the support wheels 48 travel on the ground to move the front frame. 51 is supported from below. Therefore, the left and right support wheels 48 directly grasp the unevenness and inclination of the ground to move up and down the left and right ends of the front frame 51, and the heights of the front frame and the hooks 52 are set according to the ground. Become.

The guide portion 49 includes the left and right mounting frames 4
7 includes a pair of left and right guide members 49a respectively provided at the front end portions of the guide members 7. The guide member 49a is a box-shaped member having a U-shaped vertical cross section and a horizontal cross section, and has an opening on the left and right inner sides. The front frame 51 is formed so as to be supported by being inserted into the opening. In addition, each guide member 49
The front and rear walls 50a and 50b of a are formed to be slightly wider than the front and rear width of the front frame 51 so that the front frame 51 can be moved up and down. The front and rear walls 50a and 50b guide the up and down movement of the front frame 51. ing. The interval between the upper and lower walls 50c and 50d of each guide member 49a is larger than the upper and lower width of the front frame 51.
The left and right end portions of the front frame 51 can be moved up and down in the range between 0d.

Further, the outer side wall 5 of the left and right guide members 49a.
The 0e and 50e intervals are arranged wider than the horizontal length of the front frame 51 in the horizontal state.
Is allowed to tilt in the left-right direction, and the maximum tilted state of the front frame 51 (one end contacts the upper wall 50c of the one guide member 49a and the other end of the other guide member 49a The front frame 51 is dimensionally designed so as not to come out of the both guide members 49a in the state of being in contact with the lower wall 50d).

With this structure, even if one end of the front frame 51 moves up and down due to the support wheels 48 traveling on a slope, and the front frame 51 tilts, the left and right guide members 49a allow the tilt. However, the vertical movement is guided so that the seedling box N can be reliably picked up by reliably following the front frame 51 and the hooking tool 52 in accordance with changes in height including inclination of the ground.

In the height setting means of the present invention, since the vertical movement of the front frame 51 is guided by the vertical guide member 49a which is substantially vertical to the ground, the front frame 51 is moved up and down. The hook 52 and the vertical / horizontal conveying device 6
The distance in the front-back direction from B can be kept substantially constant. Therefore, when the seedling box N lifted by the hook 52 is dropped, the seedling box N can be surely placed on the vertical / horizontal transporting device 6B, and the transporting by the transporting device 6B can be suitably performed.

The operating portion 48 may be formed into a sled type that slides on the ground instead of a supporting wheel that rolls on the ground, and detects unevenness or inclination of the ground with a contact or non-contact sensor. Then, the front frame may be moved up and down by an actuator such as a hydraulic cylinder or an air cylinder. By the way, the box pick-up mechanism 8 in the present invention may be of a simple type in which the forced disengagement means 56, the stopper means 57, the retracting means 58, the returning means 59, and the control means 65 are omitted.

That is, as shown in FIG. 21, when the hooks 52 are pivotally supported by the front frame 51 via the support shafts 54 and are brought into a substantially hanging state by their own weight, when the seedling box N is lifted and removed. Performs the natural detachment at the natural detachment angle described above, and after the detachment, returns to the hanging state by its own weight and prepares for picking up the next seedling box. However, in the case of such a simple structure, the retracting means 5
Since the vehicle 8 is not provided, when the traveling machine body 9 is moved backward, the hooking tool 52, which is in a state of being dragged on the ground, may be caught on the ground and damage the hooking tool 52.

Therefore, in the case of the simple type as described above,
It is preferable to provide a relief means for eliminating the trapping of each hook 52 as described below. As this escape means,
For example, as shown in FIG. 22A, the hook 52 is formed by being divided into an upper side 52a and a lower side 52b.
The lower end of 2a and the upper end of the lower side 52b are connected by a connecting shaft 114 in the left-right direction to be bendable, and the upper side 52a
The stopper member 115 that restricts the lower side rearward bending of the upper side 52a may be provided so as to abut on the rear surface of the upper side 52a from the upper end of the lower side 52b.

With this structure, the bending of the seedling box N is restricted by the stopper member 115 when the seedling box N is hooked, and when the hooking tool 52 is trapped on the ground when moving backward, the lower side 52b is passed through the connecting shaft 114. Is bent to the front side to prevent damage. Further, as another escape means, as shown in FIG. 22B, a vertically elongated guide hole 116 is formed at the upper end of the hook 52, and the support shaft 54 is inserted into the guide hole 116. To support it, and when the hook 52 is caught on the ground, the guide hole 1
The hook 52 may be retracted upward via 16 to prevent damage.

In the hook 52, the hanging claw portion 52A formed at the lower end is hooked on the peripheral edge Na of the seedling box N. However, depending on the type of the seedling box N, the vertical width of the peripheral edge Na may be different. is there. It is preferable to provide two types of hanging claw portions 52A and 52B as shown in FIG. 23 so as to cope with such a difference in the width of the peripheral edge Na. The hanging claws 52A, 52B are formed by bending one end 52A by bending the lower end portion of the hook 52 and fixing the other 52B by welding or the like on the side surface opposite to the bending direction of the one end 52A. The hook portion 52B is attached to the hook portion 52 on one side.
It is formed shorter than A.

Further, a changing means 117 for the hook claws 52A and 52B is provided in the middle of the hooking tool 52 in the longitudinal direction. As the changing means 117, as shown in FIG. It is divided into a side 52c and a lower side 52d, and an insertion hole 118 for the lower end of the upper side 52c and the upper end of the lower side 52d is provided, and the bolt 11 is inserted through both insertion holes 118.
The upper side and the lower side can be detachably connected by means of a nut 9 and a nut 120, and one of the hooks 52A and 52B can be selected and rotated by 180 ° for replacement.

As another changing means 117, FIG.
As shown in (b), the hook 52 is divided into an upper side 52c and a lower side 52d, and a supporting block 121 is fixed to the lower end of the upper side 52c.
1 is rotatably inserted with the upper part of the lower side 52d being retained, and a set screw 122 such as a bolt is screwed from the side surface of the support block 121 to press and fix the tip end thereof to the side surface of the hook 52d. It can also be set to

With the above-mentioned structure, the kind of seedling box N can be dealt with and the versatility is expanded. As shown in FIG. 25, if three or four hanging claw portions 52A, 52B, 52C, and 52D having different lengths are provided at the lower end of the hook 52, various seedling boxes N can be accommodated. Is.

2 to 9, the box transfer means 10 on the main unit 4 are arranged in a pair on the left and right and are located in front of the traveling machine body 9, and each box transfer means 10 is a roller type first moving means 68,
Chain type second moving means 69, roller type receiving means 7
0 and a divider 73, all of which may be provided on the traveling machine body 9, but the chain-type second moving means 69 and the roller-type receiving means 70 are supported by the support frame 5.

Power from one central motor 71 is transmitted to the roller shaft of the left and right first moving means 68 via the chain transmission means and also to the left and right second moving means 69.
The second moving means 69 is provided with an engaging piece 72 on the chain and is configured to be hooked and pushed by the front and rear ends of the seedling box N, and the receiving means 70 is moved by the second moving means 69. We are receiving Box N.

The box delivery means 10 comprises the main unit 4
When the unfolding work unit 3A is mounted on, the seedling box N placed on the first moving means 68 is pushed by the second moving means 69 onto the vertical and horizontal transport mechanism 6A, and the collecting work unit 3B is mounted. In this case, the seedling box N sent by the vertical transport means 39 of the vertical / horizontal transport mechanism 6B is moved to a position above the first moving means 68 via the second moving means 69, and the seedling box N with the vertical / horizontal transport mechanisms 6A, 6B. To deliver.

From the second moving means 69 to the first moving means 6
When the seedling box N is moved to 8, the divider 73 located at the rear portion between the left and right second moving means 69 sets the left and right spacing of the seedling box N, and the seedling box N is set to the regular inside / outside receiving members 79A and 80A. Correct so that it is in the position. The box delivery means 10 is
It is also possible to form the first moving means 68 or the second moving means 69 to be long and to configure it alone, and the first moving means 68 and the second moving means 69 may be driven by separate motors. .

The box raising / lowering mechanism 11 is shown in FIGS. 1 to 5, 8 and 9, and is arranged so as to straddle the first moving means 68 of the left and right box delivering means 10, and a total of four seedlings in front, back, left and right. The boxes N can be moved up and down at intervals with an interval between them, and when the seedling boxes are unfolded, two front and rear seedling boxes N are supplied to each of the left and right first moving means 68, and when the seedling boxes are collected, the left and right first moving means 68. From seedling box N
The front and rear are picked up two by two and delivered to the box loading / unloading mechanism 12 arranged on the rear side.

The box elevating mechanism 11 is a mechanism frame 76 fixed to the traveling machine body 9, and a box multi-stage elevating device which is supported by the mechanism frame 76 and elevates the left and right seedling boxes N one by one vertically at intervals. Means 77 and all seedling boxes N on this box multi-stage lifting means 77
And pusher means 78 for pushing back. The pusher means 78 is used only during the seedling box collecting operation, and may be detachable from the mechanism frame 76.

The box multi-stage lifting means 77 is a horizontally-arranged seedling box N.
It has a bilaterally symmetrical structure so that it can move up and down at the same time, and it can move up and down at the same time right and left simultaneously. The left and right structures have a pair of inner chain 79 and outer chain 80 at the front and rear, and are installed on the front and rear inner chain 79. The receiving member 79A and the receiving member 80A installed on the front and rear outer chains 80 receive the front and rear two-piece set N.

The receiving members 79A and 80A are made of an L-shaped angle member when viewed from the front and can be lowered and transferred to the first moving means 68 while holding the seedling box N, and can be reversed. By doing so, the seedling box N on the first moving means 68 can be picked up while rising. Inner and outer chains 7
9 and 80 are hung on a sprocket supported by a mechanism frame 76, but an inner chain 79 is a box multistage lifting means 77.
Since there is little space to be wound in the center of the outer chain 80, as shown in FIG. 4, it is wound around the outer chain 80 while bypassing the idler sprocket 81.

The pusher means 78 has an actuator 82 such as a hydraulic cylinder supported by the mechanism frame 76, and a pushing member 83 provided on a cylinder rod or the like of the actuator 82, and the pushing member 8 is operated by the operation of the actuator 82.
3 can be pushed between the inside and outside receiving members 79A and 80A, and the seedling box N lifted from the first moving means 68 by the box multistage lifting means 77 at the time of recovery work is moved backward while maintaining the multistage state with a vertical gap. You can extrude all at once.

The box loading / unloading mechanism 12 arranged at the rear of the main unit 4 is substantially a mechanism dedicated to the unfolding work.
At the time of collection work, it plays a role of forming an arrangement space for the nursery shelf 85. However, the box loading / unloading mechanism 12 is used for the traveling machine body 9 during the unfolding work.
You may leave it. 1 to 3, 8, 9, 12 to
18, the box loading / unloading mechanism 12 has four columns 88 standing on a base 87 fixed to the traveling machine body 9 and front and rear columns 88.
The upper part is connected to form a support frame 86, and the support frame 86 is provided with a stack box separating device 91.
The stacked seedling box N placed on the receiving table 89 can be stored in the internal space.

The cradle 89 is for transporting seedling boxes, on which two laterally arranged seedling boxes N are set, one on the front side and the other on the right side. A total of four seedling boxes N in the front, rear, left and right are formed with a gap between the boxes so that a hanging nail 97 described later can be inserted therein. A guide column 88A is arranged in each of the four columns 88, and the holding frame 92 is guided by the guide columns 88A so as to be vertically movable. Chain lifting means 93 are provided on the left and right sides of the support frame 86, and the holding frame 92 is connected to the chain 93A of the chain lifting means 93, and the power from the motor 94 is transmitted through the transmission means 95. By driving and driving the chain 93A, the holding frame 92 can be raised and lowered in a horizontal posture.

The stacking box separating device 91 has a total of four front, rear, left and right.
From the holding frame 92 that moves up and down with respect to the stacked seedling boxes N, the claw holders 9 are provided corresponding to the left and right opposite sides of each seedling box N.
6 and hang it on the nail holder 96 via the shaft 99.
A pair of hanging claws 97 for hooking the left and right opposite sides of the is pivotally supported. The hooks 97 are projections at the front and rear ends of the seedling box N, which are peripheral edges N.
A can be hooked.

The claw holder 96 is provided with a stopper 98 for restricting the swinging of the hanging claw 97 from a substantially horizontal posture, and this stopper 98 constitutes a hanging claw posture control means. In FIG. 17, when the hanging claw 97 descends from above with respect to the peripheral edge Na of the opposite side of the stacked uppermost seedling box N, it hits the peripheral edge Na and swings upward to escape (state b), and when rising from the bottom. The claw posture control means keeps the posture substantially horizontal and catches it on the peripheral edge Na (state c).

Further, the support 12 depending from the holding frame 92.
3, an L-shaped receiving rail 100 in a front view having a length extending over the seedling box N of the front and rear sets is pivotally supported via an L-shaped bracket 100a and a pivot shaft 101.
A contact arm 102 is provided at a, and when it ascends, it abuts on a cam (actuating member) 103 provided on the column 88 to swing the receiving rail 100 upward from the dotted line position to the solid line position in FIG. It has become.

The cams 103 are provided on the left and right front columns 88 and not at the center of the stacking box separating device 91 on the left and right sides. Therefore, the contact arms 102 are also provided on the left and right outer L-shaped brackets 100a at the center side. Therefore, the left outer receiving rail 100 and the right inner receiving rail 10
0 means the right outer rail material 100 and the left inner receiving rail 1
00 are connected by interlocking rods 105, and the inner receiving rail 100 is interlocked with the outer receiving rail 100.

An operating member is formed by the contact arm 102 and the cam 103, and the operating member and the receiving rail 100 are formed.
And the like constitute the receiving means 104, and after the hanging claw 97 is engaged with the seedling box N and lifted, the contact arm 102 engages with the cam 103 and the receiving rail 100 swings when further raised. The receiving rail 100 receives the two seedling boxes N on the front and rear instead of the hook 97 (state d in FIG. 17).

On the holding frame 92, the receiving rail 100 is provided.
A pair of left and right pushing means 107 for pushing the two front and rear seedling boxes N received by the forward direction is provided. This pushing means 1
07 is a pusher plate 110 that winds a chain around the front and rear shafts 108 and 109 supported by the holding frame 92 via front and rear brackets, and abuts the rear peripheral edge Na of the seedling box N on the chain.
Is mounted and driven from the motor 111 on the holding frame 92 via the power transmission means 112.

The pushing means 107 pushes forward and backward two seedling boxes N on the receiving rail 100 at the same time in the forward direction, so that the inner and outer receiving members 79A, 80A located above the box multistage lifting means 77.
Reprinted to. As described above, the vertical and horizontal transport mechanisms 6A, 6B,
When the box transfer means 10, the box elevating mechanism 11, the box loading / unloading mechanism 12 and the like process the seedling boxes N as a set of two front and rear, the processing can be performed faster than when processing one by one.

The box loading / unloading mechanism 12 uses a hydraulic cylinder in place of the chain lifting means 93, lifts the stacked seedling boxes N instead of lifting the holding frame 92,
The pushing means 107 may be formed of a hydraulic or pneumatic cylinder like the pusher means 78. Further, the actuating member may be formed by a pneumatic cylinder or a solenoid, and in that case, at any position above the stacked seedling box N, the rail 1 for receiving the seedling box N lifted by the hooks 97 may be provided.
00, and the pushing means 107 can push the box multistage lifting means 77.

At the time of recovery work, the box loading / unloading mechanism 12 raises the stack box separating device 91 to the uppermost position,
The seedling raising shelf 85 is stored and mounted on the base 87 below it.
This seedling raising shelf 85 has receiving bars 85A which are substantially the same in number as the number of stages of the box multi-stage elevating means 77 and which face each other.
Front and rear and left and right total 4 pushed out from the box multistage lifting means 77 by 8
All the seedling boxes N are simultaneously received and taken out of the machine by a forklift or the like.

Next, when the seedling box ground processing machine 1 shown in the above-mentioned embodiment is set in the main unit 4 so that the expanding work unit 3A can be used, the seedling box expanding machine A is expanded. The method will be described. 4 seedling boxes N in total
For example, a pedestal 89 that is placed in a stack of 30 layers
Is transported by a forklift and inserted into the box loading / unloading mechanism 12, and the seedling box deploying machine A is moved to the end of the deploying area in the house.

The chain lifting / lowering means 93 of the box loading / unloading mechanism 12 is operated to move the stack box separating device 91 to the front, rear, left, right 4
The seedling box N is picked up, and the seedling box N transferred to the receiving means 104 is pushed forward by the pushing means 107 to be supplied to the box lifting mechanism 11. The box raising / lowering mechanism 11 receives the seedling boxes N sequentially supplied from the box loading / unloading mechanism 12 by the receiving members 79A and 80A, intermittently lowers them, and moves the first moving means 6 at the lowest position.
Move to 8.

The first moving means 68 supplies the received seedling box N onto the vertical / horizontal conveying mechanism 6A via the second moving means 70. The seedling boxes N loaded in a set of two on the left and right are laterally moved in the horizontal direction by one lateral seedling box N by the lateral transporting means 25, and are sequentially pushed when the succeeding seedling boxes N enter and are transported vertically. Two
4 is loaded to the left and right ends. When the seedling boxes N are supplied to the entire left and right ends of the vertical transport means 24, the tilting mechanism 7 operates to tilt the vertical and horizontal transport mechanisms 6A forward and incline, and deposits them on the ground. It is slid down, and the drive roller 23 is driven to reliably transfer the rear seedling box N to the ground. This delivery is performed while the traveling machine body 9 is moving backward.

As a result, for example, five seedling boxes N are arranged on each side of the passage L. Next, the seedling box ground processing machine 1 is connected to the main unit 4 by the collecting work unit 3
A method for collecting seedling boxes in the case where B is set in a usable state and used as a seedling box collecting machine B will be described.

The traveling machine body 9 is moved forward with the vertical / horizontal conveying mechanism 6B in the downward inclined posture, the peripheral edges Na of the four seedling boxes N are horizontally aligned by the hooking tools 52 of the box picking mechanism 8, and the traveling machine body 9 is further advanced. Let me lift the rear end of the seedling box N,
It is transferred to the vertical and horizontal transport mechanism 6B. At the time of hooking the seedling box N, the height setting means causes the catching tool 52 to follow the change in height including the inclination of the ground to ensure that the seedling box N is vertically and horizontally conveyed.
It will be possible to transfer to B.

While the vertical / horizontal transfer mechanism 6B is set in a substantially horizontal position by the tilting mechanism 7, the vertical transfer means 39 is operated to operate the four seedling boxes N.
When moving backward, the two seedling boxes N on the left are conveyed by the vertical transport means 39.
While the right two seedling boxes N move to the rear end, the movement is stopped by the stopper 45 in the middle of the vertical conveying means 39, and when the left and right lateral conveying means 40 are operated in that state, the left and right seedling boxes N are separated. Collected in the center, a pair of front and rear two pieces are made left and right.

Then, the vertical transfer means 39 is operated again to move the four seedling boxes N in the rearward direction by the second moving means 69, and the divider 73 corrects the position of the seedling boxes N to make them normal positions. It is sent to the first moving means 68 and supplied to the lower part of the box elevating mechanism 11. The box raising / lowering mechanism 11 is a seedling box N that has been brought in.
Are intermittently raised by the receiving members 79A and 80A, and are pushed backward by the pusher means 78 in a state where the seedling boxes N are contained in all stages.

A seedling raising shelf 85 is arranged in advance in the box loading / unloading mechanism 12, and the seedling raising tray 85 of the seedling raising shelf 85 is provided with all the receiving trays N.
To store. The nursery shelf 85 is lowered by a forklift and transported to a required position. The present invention is not limited to the above-mentioned embodiment, but can be modified in various ways. For example, the seedling box deploying machine A and the seedling box collecting machine B are configured such that a horizontally arranged seedling box N is set as a pair of front and rear, and a pair of right and left sets are combined to make a total of four sets for batch processing. However, the seedling box N may be vertically arranged, or the pair of left and right devices may be configured by only one. Further, the left and right vertical / horizontal transporting mechanisms 6B may carry out the seedling boxes N on the unloading side on the vertical transporting means 39, then laterally feed them by the lateral transporting means 40, and carry them backward one by one without setting them in the front-rear setting.

[0090]

According to the present invention described in detail above, the hooking tool can be reliably followed by changes in elevation including the inclination of the ground in the left-right direction, and the reliability of picking up the box can be increased. Becomes Further, since the hooking tool is moved in an arc to raise the seedling box by the forward movement of the traveling machine body, a special drive mechanism for lifting the seedling box is not required, and the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a side view showing the whole seedling box ground processing machine of the present invention.

FIG. 2 is a side view of the whole seedling box developing machine.

FIG. 3 is a plan view of a seedling box expanding machine.

FIG. 4 is a front view of a seedling box expanding machine.

FIG. 5 is a plan view of a main part of the seedling box expanding machine.

FIG. 6 is a side view of a support frame and a tilting mechanism.

FIG. 7 is a plan view of a support frame and a conveyance frame.

FIG. 8 is a side view of the entire seedling box collecting machine.

FIG. 9 is a plan view of a seedling box collecting machine.

FIG. 10 is a side view of the box pick-up mechanism.

FIG. 11 is a front explanatory view of a box pick-up mechanism.

FIG. 12 is a rear view of the box loading / unloading mechanism.

FIG. 13 is an enlarged rear view of the main part of the box loading / unloading mechanism.

FIG. 14 is a plan view of the box loading / unloading mechanism.

FIG. 15 is a side view of the box loading / unloading mechanism.

FIG. 16 is a rear view of a main part of the stack box separating device.

FIG. 17 is an explanatory diagram of a stack box separating operation.

FIG. 18 is a rear view in which seedling raising shelves are arranged in the box loading / unloading mechanism.

FIG. 19 is a perspective view showing a height setting means of the hooking device.

FIG. 20 is a front view of the same.

FIG. 21 is a side view showing a simple box pick-up mechanism.

FIG. 22 is a side view showing an escape means.

FIG. 23 (a) is an enlarged side view of a main part relating to a hanging claw part;
(B) is a plan view of the hanging claw portion.

FIG. 24 is a perspective view showing a means for changing the hanging claw portion.

FIG. 25 is a plan view showing another form of the hook portion.

[Explanation of symbols]

1 Seedling box deployment collection machine 3 work units 4 main unit 6 Vertical and horizontal transport mechanism 8 box picking mechanism 9 traveling aircraft 51 mechanism frame 52 Hook 48 Working part (supporting wheel) 49 Guide B seedling box collection machine N seedling box

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Susumu Yamamoto 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Plant (56) References JP-A-10-127172 (JP, A) JP-A-9- 275794 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01G 9/00 A01C 11/00

Claims (3)

(57) [Claims] 1. A box pick-up mechanism in a seedling box collecting machine, wherein a seedling box developed on the ground is hooked and lifted by a hook, and the lifted seedling box is transferred to a transport device on the traveling machine body side. A mechanism frame that supports the hooking tool, a mounting frame that supports the mechanism frame on the traveling body side, and a setting unit that sets the height so that the hooking tool follows the ground,
The setting means is provided between the operating portion for vertically moving the mechanism frame up and down and the mounting frame and the mechanism frame, and guides the vertically moving operation while allowing the mechanism frame to tilt in the left-right direction. A box picking mechanism in a seedling box collecting machine, which is provided with a guide part. 2. The operating unit follows the ground by supporting the mechanism frame from below while grounding on the ground.
The box pick-up mechanism in the seedling box collecting machine according to claim 1, further comprising a support member for moving up and down the mechanism frame. 3. An upper portion of the hooking device is pivotally supported by a mechanism frame so that the hooking device can swing in an arc by advancing the traveling body while the hooking device is hooked on a seedling box. The box pick-up mechanism in the seedling box collecting machine according to claim 1 or 2, which is configured to lift the seedling box.