JP2011019411A - Pot seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pot seedling transplanter having a pot seedling-reversing and feeding device for receiving laterally arranged pot seedlings from a pot seedling box, downward conveying the pot seedlings, and simultaneously reversing the longitudinal directions of the pot seedlings, which can accurately position a seedling receiver at a seedling-receiving position, and can prevent that the position of the seedling receiver positioned at the seedling-receiving position is varied from a prescribed position even after the pot seedling-reversing and feeding device is repeatedly operated for a long period. <P>SOLUTION: The pot seedling transplanter is characterized by attaching a seedling receiver 1 to seedling-receiving arms through elastic members 21, disposing positioning members 22 having holes at the right and left positions of the seedling receiver 1, and disposing position control members (pin) 23. The pin 23 has step portions 23a and fitting portions 23b, respectively, on a machine frame 7. When the seedling receiver 1 is upward rotated, the holes of the positioning members 22 are fit into the fitting portions 23b of the pins 23, and the upper surfaces of the positioning members 22 then contact with the step portions 23a, thereby positioning the seedling receiver 1 at the seedling-receiving position. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an improvement of a pot seedling transplanter that transplants pot seedlings with root pots such as rice and vegetables into a field.

For example, Patent Document 1 discloses a pot seed reversal supply device that accepts a row of pot seedlings from a pot seedling box and transports the pot seedlings downward, and at the same time reverses the front-rear direction, and the pot supplied by the reversal supply device. An endless horizontal conveyor belt for placing seedlings and transporting them in a horizontal plane, and a pot seedling transplanter including a planting device for planting pot seedlings fed from an edge of the endless horizontal conveyor belt in a field are described. ing.
A conventional pot seedling transplanter will be described with reference to Patent Document 1 and FIGS.

In the transplanter for pot seedlings, a flexible pot seedling box with a number of pot seedling rooms connected continuously is bent and fed intermittently in a row on the seedling platform, and is provided at the rear of the seedling platform at a predetermined position. The extrudates that have been pushed enter the pot seedling chambers in a horizontal row of the pot seedling box from the bottom side, and push the pot seedlings forward (see Patent Document 1 above). The root part of the pushed pot seedling is pushed into the seedling holding part 1a having a concave cross section of the seedling receiver 1 stopped at the front seedling receiving position.
Subsequently, the seedling receiver 1 that has received the pot seedling (not shown) is inverted while rotating downward, transports the pot seedling downward, and reverses the front and rear direction of the pot seedling. The first seedling hold part 1a passes through the position of the spring-out member 2 with the root part side of the pot seedling first, and stops (see the phantom line in FIG. 3).

When the seedling holding part 1a of the seedling receiver 1 passes through the position of the jumping member 2 (this position is the seedling extraction position for the seedling receiver 1), the pot seedling is pushed out of the seedling holding part 1a and the jumping member 2 Is quickly rotated downward (indicated by an arrow X) at the same time as the pot seedling is completely removed from the seedling holding portion 1a, and drops the pot seedling onto the lower endless horizontal conveying belt 3. The reason why the pot seedling is forcibly dropped without leaving it to fall naturally is to supply the pot seedling to the predetermined position of the moving endless horizontal conveying belt 3 quickly and reliably.
The endless lateral transport belt 3 places the dropped pot seedlings and transports them in the lateral direction of the machine body, and sequentially feeds them from the edges, and the pot seedlings that are fed out are planted in a field by a planting device (not shown).

The seedling receiver 1 is a part of the inversion supply device. This reversal supply device includes a drive crank 4 having a crankshaft 4a continuously rotating at a constant speed, the seedling receiver 1, a transmission mechanism 5 and a reversing mechanism 6 disposed between the drive crank 4 and the seedling receiver 1. Become. The crankshaft 4a is rotated by a part of the power of the drive source (engine) of the pot seedling transplanter.
The transmission mechanism 5 includes a support arm 9 that is pivotally supported (support shaft 8) so as to be swingable up and down on the machine body 7, and is supported at the lower end of the seedling receiver 1 and is supported at the tip of the support arm 9 (support shaft 10). A pair of seedling receiving arms 11, a swinging arm 13 pivotally supported (support shaft 8) on the machine body 7, and a spring mechanism 14 for connecting the swinging arm 13 and the support arm 9 (for details) And a vertical feed rod 15 that connects the crank pin 4b of the drive crank 4 and the swing arm 13 to each other. Further, a stopper 16 for the support arm 8 is installed on the body 7.

  In this transmission mechanism, the vertical feed rod 15, the swing arm 13, the spring mechanism 14, the support arm 9, and the seedling receiving arm 11 serve as a power transmission path from the drive crank 4 to the seedling receiving 1. Specifically, when the drive crank 4 rotates, the vertical feed rod 15 operates to swing the swing arm 13, and the swing of the swing arm 13 is transmitted to the support arm 9 via the spring mechanism 14 and supported. The arm 9 is swung up and down, whereby the seedling receiving arm 11 and the seedling receiving 1 are reciprocated up and down (see the solid line and the virtual line in FIG. 3). As described in Patent Document 1, even after the support arm 9 that swings upward as the swing arm 13 swings comes into contact with the stopper 16, the swing arm 13 further includes the spring 14 a of the spring mechanism 14. Oscillates to the upper limit while compressing and then the oscillating arm 13 starts oscillating in the opposite direction. Therefore, while the spring 14a of the spring mechanism 14 is compressed, the support arm 9 comes into contact with the stopper 16 and stops, and the seedling receiver 1 is in the upper end position (seedling receiving position).

The reversing mechanism 6 includes a cam roller 17 installed on one seedling receiving arm 11 and a cam 18 having a cam surface on which the cam roller 17 rotates. The cam 18 is fixed to the body 7. When the drive crank 4 rotates and the support arm 9 and the seedling receiving arm 11 swing up and down, the cam roller 17 rotates and moves along the cam surface of the cam 18, whereby the seedling receiving arm 11 moves the support shaft 10. Rotates as the center. As a result, the seedling receiver 1 reverses 180 degrees while rotating downward from the solid line position (upper end position) to the virtual line position (lower end position) shown in FIG. 3, and conversely, from the virtual line position to the solid line position. While rotating upwards, it reverses 180 degrees in the reverse direction and returns to its original posture.
In Patent Document 1, what corresponds to the reversing mechanism 6 is a seedling receiving rod (number 9 is assigned in Patent Document 1) installed in the machine body. The pot seedling transplanter shown in FIGS. 3 and 4 and the pot seedling transplanter described in Patent Document 1 are substantially different only in the configuration of the reversing mechanism.

  In the above example, the seedling receiver 1 comes into contact with the stopper 16 and stops at the upper end position (seedling receiving position) for a predetermined time. Is adjusted as appropriate in consideration of the time required for pushing out and subsequently pushing into the seedling holding portion 1a of the seedling receiver 1. If the time required for the pushing and pushing operations is very short, the stop time itself may be unnecessary. In that case, the stopper 16 and the spring mechanism 14 are not essential, and the swing of the swing arm 13 may be directly transmitted to the support arm 9 without passing through the spring mechanism 14.

  In this kind of pot seedling transplanter, when the seedling receiver 1 comes to the upper end position (seedling receiving position), the height of the seedling holding portion 1a of the seedling receiver 1 is equal to the horizontal row from the pot seedling box on the seedling stand. The pot seedlings that correspond to the height of the extrusion basket that extrudes the pot seedlings (height direction), each seedling holding portion 1a is positioned straight forward in the extrusion direction of each extrusion basket (left-right direction), and are extruded by each extrusion basket So that the seedling holder 1 is pushed into the seedling holding part 1a at an appropriate depth (front-rear direction), the height direction of the seedling receiver 1 is determined by a stopper (the support arm 9 abuts), and the horizontal direction of the seedling receiver 1 ( The position in the left-right direction and the front-rear direction is adjusted at the time of initial assembly.

Japanese Patent Publication No.55-38082

  However, when the reverse feeding device is repeatedly operated over a long period of time, the support arm 9 may come into contact with the stopper 16 due to the twist of the support arm 9 or the seedling receiving arm 11, the backlash of the bearing portion, the distortion of the body frame, or the like. The seedling receiver 1 is positioned at a position deviated in the vertical direction and / or horizontal direction (left and right direction, front and rear direction) from the above correct upper end position (seedling receiving position), or positioned in a state inclined in the left and right direction. (This is also a kind of vertical misalignment). Depending on the degree of the positional deviation, when the pot seedling pushed out by the pusher is pushed into the seedling holding part 1a, the root pot may be damaged or not pushed into the seedling holding part 1a at an appropriate depth. For this reason, when the seedling receiver 1 subsequently rotates and reverses downward, the root pot of the pot seedling pushed into the seedling holding part 1a falls out of the seedling holding part 1a and falls, or from the seedling holding part 1a. The taken-out pot seedling does not fall to a specified position on the endless lateral conveyance belt 3, and as a result, there may be a problem that the pot seedling cannot be transplanted normally.

  In order to prevent such problems, the rigidity of the seedling receiving arm, supporting arm, its bearings, frame, etc. that support the seedling receiver is increased, and even after repeated use of the reversing supply device for a long period of time, there is no backlash or distortion in this part. Although it is conceivable that this will not occur, this increases the weight and cost of the transplanter. On the other hand, if the seedling receiver is misaligned, it is necessary to make adjustments so that it returns to the specified position. However, this involves considerable difficulty and costs even if possible.

  The present invention adopts a supply method as shown in FIGS. 3 and 4 (a row of pot seedlings pushed out from a pot seedling box by an extrusion punch is received at the top end seedling receiving position and conveyed downward and simultaneously in the front-rear direction. This has been made in view of the above-mentioned problems that have conventionally occurred in pot seedling transplanting machines (having a pot seedling reversal supply device that reverses the orientation of the seedlings), and specifically, has come to the upper end position (seedling receiving position) While accurately positioning the seedling receiver, it is possible to prevent the position of the positioned seedling receiver from fluctuating from the specified position even after a long-term repeated operation of the reversing supply device, and to reduce the weight and cost of the aircraft. The goal is to achieve this without much increase.

  The present invention has a seedling holding section having a concave cross section for receiving each root pot part of a row of pot seedlings pushed out from a pot seedling box on a seedling stand, and reciprocates up and down, and at the upper end position, A seedling receiver that receives each root pot part of a row of pot seedlings in the seedling holding part, reverses when rotating downward, conveys the pot seedling downward, and reverses the orientation in the front-rear direction, and An endless horizontal transport belt for placing and transporting a pot seedling taken out from the seedling receiver horizontally supported and rotated downward, and a pot seedling fed from the edge of the endless lateral transport belt in the field A planting device for planting is provided, and a pair of left and right seedling receiving arms are pivotally supported on a support arm that is swingably installed on the airframe, and the seedling receiver is attached to the seedling receiving arm. The round trip of the seedling receiver And the pot seedling transplanting machine in which reversal is performed, the seedling receiver is attached to the seedling receiving arm via an elastic body, positioning members are installed on the left and right of the seedling receiver, and the positioning is performed on the machine body. A position regulating member for positioning the seedling receiver in cooperation with the member is installed, and when the seedling holder is rotated upward, each positioning member is pressed in contact with the corresponding position regulating member, thereby the seedling The upper end position of the receiver and positioning in a horizontal plane are performed.

In the pot seedling transplanter according to the present invention, the seedling receiver rotates upward, and the positioning member of the seedling receiver contacts and is pressed against the position regulating member installed on the machine body, and the pair of right and left seedling receiving arms and the seedling The elastic body installed between the receivers is compressed and deformed according to the pressing force. In addition, even if there is a slight misalignment in the horizontal plane between the positioning member and the corresponding position restricting member before they contact each other, the elastic body shears and absorbs the misalignment, It is always positioned at a predetermined position determined by the installation position of the position regulating member. In the present invention, the position of the seedling receiver when the positioning member is pressed against the position regulating member is the seedling receiving position, which is the upper end position in the height direction.
As a more specific form of the present invention, the position regulating member is a pin having a stepped portion, and the positioning member is a member having a hole into which the pin is inserted. In this case, the seedling receiver is positioned by the pin being fitted into the hole and the stepped portion contacting the periphery of the hole.

  In the pot seedling transplanter according to the present invention, if the support arm, the seedling receiving arm or the like is loose and distorted, the height of the left and right positioning members is lowered before the positioning member and the corresponding position regulating member contact each other. Even when there is a displacement (case where the seedling receiver is inclined to the left and right), or there is a displacement in the front-rear direction or the left-right direction within the horizontal plane between each positioning member and the corresponding position regulating member Even in this case, when the seedling receiver rotates upward and the positioning member contacts and is pressed against the position regulating member, the elastic body attached between the pair of left and right seedling receiving arms and the seedling receiver is compressed and / or Shear deformation and absorb the displacement. Therefore, the seedling receiver can always be accurately positioned at a predetermined position (upper end seedling receiving position) determined by the installation position of the position regulating member.

Therefore, even if looseness or distortion occurs in the support arm, seedling receiving arm, etc. as a result of repeated use of the reversal supply device for a long time, the seedling receiver can always be accurately positioned at a predetermined seedling receiving position, Thereby, the horizontal row of pot seedlings pushed out from the seedling box by the extrusion basket can be surely pushed into the seedling holding portion of the seedling receiver. In addition, the root pot of the pot seedling does not come off midway from the seedling holding part of the seedling receiver that rotates and reverses downward, and the pot seedling taken out from the seedling holding part does not fall to a specified position on the endless horizontal conveyance belt This problem is also solved, and transplanting of pot seedlings can be performed normally.
In addition, the solution is a simple one in which an elastic body is provided between the pair of right and left seedling receiving arms and the seedling receiver, a positioning member is provided on the seedling receiver, and a position regulating member corresponding to each positioning member is provided on the machine body. Therefore, there is an advantage that an increase in weight and cost of the transplanter can be suppressed. Further, if the installation position of the position regulating member can be adjusted, the adjustment is easy and the cost is not excessive even if a positional deviation occurs.

It is a principal part of the pot seedling transplanter according to the present invention (mainly a part of the pot seedling reversal supply device) side view. It is the principal part (mainly the part of pot seedling reverse supply apparatus) top view. It is a principal part (mainly part of a pot seedling inversion supply apparatus) side view of the conventional pot seedling transplanter. It is the principal part (mainly the part of pot seedling reverse supply apparatus) top view.

Hereinafter, a pot seedling transplanter according to the present invention will be described with reference to FIGS. The pot seedling transplanting machine according to the present invention is different from the conventional pot seedling transplanting machine shown in FIGS. 3 and 4 in the manner in which the seedling receiver 1 is attached to each seedling receiving arm 11 and the seedling receiving position 1 to the seedling receiving position. Only the positioning mechanism is different. 1 and 2, substantially the same parts as those in the pot seedling transplanter shown in FIGS.
In the pot seedling transplanting machine shown in FIGS. 1 and 2, an elastic body 21 such as rubber is installed on one upper end of a pair of left and right seedling receiving arms 11, and the seedling receiver 1 is attached to the seedling receiving arm 11 via the elastic body 21. It is attached. For this reason, the seedling receiver 1 is in a state in which the attachment position with respect to the seedling receiving arm 11 can be displaced three-dimensionally.

  A pair of positioning members 22 are fixed to the left and right of the seedling receiver 1. The positioning member 22 is a plate member projecting to the left and right of the seedling receiver 1 and has a circular hole 22a. In addition, a pair of position regulating members 23 (both of which constitute the positioning mechanism) for positioning the seedling receiver 1 in cooperation with the positioning member 22 are fixed at positions corresponding to the positioning member 22 of the machine body 7. Yes. The position restricting member 23 is composed of a pin having a circular section having a step portion 23a (hereinafter referred to as pin 23), and the outer diameter of the portion (insertion portion 23b) ahead of the step portion 23a of the pin 23 is slightly larger than the inner diameter of the hole 22a. Although small, when the fitting portion 23b is fitted into the hole 22a, only a slight gap is formed between the outer peripheral surface of the fitting portion 23b and the inner peripheral surface of the hole 22a. The tip of the fitting portion 23b is thin in a substantially conical shape.

In this pot seedling transplanter, positioning of the seedling receiver 1 to the seedling receiving position is performed as follows.
When the support arm 9 swings upward and the seedling receiver 1 rotates together with the seedling receiving arm 11 and approaches the upper end position, first, the hole 22a of the positioning member 22 fixed to the seedling receiver 1 becomes the pin 23 It fits in the insertion part 23b, and the position in the horizontal surface of the seedling receiver 1 is decided. Even if the position of the seedling receiver 1 in the horizontal plane is deviated from the specified position, the seedling receiver 1 is displaced with respect to the seedling receiving arm 11 by fitting the positioning member 22 and the pin 23 (this displacement is Absorbed by elastic deformation of the elastic body 21), the displacement is corrected.

In this state, when the support arm 9 swings further upward and the seedling receiver 1 rotates together with the seedling receiving arm 11, the upper surface of the positioning member 22 comes into contact with and is pressed against the stepped portion 23 a of the pin 23. 21 is elastically deformed. When the upper surfaces of the left and right positioning members 22 come into contact with the stepped portions 23a of the pins 23, the position in the height direction of the seedling receiver 1 is determined (at this time, the positioning of the seedling receiver 1 is completed). At this time, if the left and right heights of the seedling receiver 1 are deviated, the other positioning member 22 is not yet in contact with the step portion 23a when the one positioning member 22 comes into contact with the step portion 23a. However, when the seedling receiving arm 11 is further rotated further upward, the seedling receiving 1 is displaced relative to the seedling receiving arm 11 on the one positioning member 22 side (this displacement is absorbed by the elastic body 21). Subsequently, the other positioning member 22 also comes into contact with the stepped portion 23a, thereby correcting the positional deviation in the height direction of the seedling receiver 1 and completing the positioning of the seedling receiver 1 to the seedling receiving position.
Subsequently, the support arm 9 comes into contact with the stopper 16 and the upward swing is stopped. The subsequent process is the same as that of a conventional transplanter.

  In the pot seed transplanter illustrated above, the stopper 16 and the spring mechanism 14 are provided as in the conventional transplanter. However, when the stop time itself at the seedling receiving position of the seed receiver 1 is not necessary, The stopper 16 and the spring mechanism 14 are not essential as in the transplanter.

DESCRIPTION OF SYMBOLS 1 Seedling receptacle 9 Support arm 11 Seedling receptacle arm 21 Elastic body 22 Positioning member 22a Hole 23 Position control member (pin)
23a Pin step 23b Pin insertion part

Claims (2)

It has a seedling holding section having a concave cross section for receiving each root pot portion of a row of pot seedlings pushed out from a pot seedling box on a seedling stand, reciprocates up and down, and the above-mentioned row of pot seedlings at the upper end position. Each root pot part is received in the seedling holding part, and when rotated downward, the seedling holder is reversed and transports the pot seedling downward and reverses the front-rear direction, and is horizontally supported below the seedling receiver. An endless horizontal transport belt for placing and transporting the pot seedling taken out from the seedling receiver rotated downward, and a planting device for planting the pot seedling fed from the edge of the endless lateral transport belt in the field A pair of left and right seedling receiving arms is pivotally supported by a support arm that is swingably installed on the machine body, the seedling receiver is attached to the seedling receiving arm, and the seedling receiver Reciprocal rotation and reversal In the pot seedling transplanter to be performed, the seedling receiver is attached to the seedling receiving arm via an elastic body, positioning members are installed on the left and right of the seedling receiver, and the seedling is cooperated with the positioning member on the body. A position regulating member for positioning the receiver is installed, and when the seedling receiver is rotated upward, each positioning member is pressed in contact with the corresponding position regulating member, and thereby, in the upper end position of the seedling receiver and in the horizontal plane A pot seedling transplanting machine characterized in that positioning is performed. The position regulating member is a pin having a stepped portion, the positioning member is a member having a hole into which the pin is fitted, the pin is fitted into the hole, and the stepped portion is around the hole of the positioning member. 2. The pot seedling transplanter according to claim 1, wherein the seedling receiver is positioned by contact.

Images