JP2020156477A - Seedling-longitudinally-feed mechanism - Google Patents

Abstract

To provide a seedling-longitudinally-feed mechanism capable of increasing a longitudinally-feed amount of seedlings despite a simple structure thereof.SOLUTION: A seedling longitudinally-feed mechanism includes: seedling longitudinally-feed belts 155 that longitudinally feed and move seedling mats mounted on seedling placement tables 51 to a seedling take-out side; a longitudinally-feed driving cam 80b that rotates to operate the longitudinally-feed belts 155; a first oscillating member 153 that oscillates by rotation of the longitudinally-sending driving cam 80b; a second oscillating member 156 that oscillates at an oscillating angle in accordance with an oscillating angle of the first oscillating member 153 and rotates a belt driving shaft 155a for driving the seedling longitudinally-feed belts 155 in a feeding direction; and a link-type amplifying mechanism 154 that is arranged between the first oscillating member 153 and second oscillating member 156 and amplifies an oscillating angle of the first oscillating member 153.SELECTED DRAWING: Figure 4

Description

The present invention relates to a seedling vertical feeding mechanism.

The following Patent Documents 1 and 2 disclose matters relating to a drive mechanism of a seedling vertical feed belt in a seedling mounting device of a transplanting machine.

JP-A-2007-209276 Jikkenhei 5-46219

However, Patent Document 1 describes a structure in which a belt drive mechanism for driving a belt drive shaft of a rice transplanter is driven by directly locking a vertical feed drive cam and a belt drive cam. There was a problem that it was not possible to take a large amount. Further, Patent Document 2 describes that the vertical feed amount is changed by interposing a plurality of transmission gears in the vertical feed drive system for driving the vertical feed chain of the seedling tray, but the transmission gears are accommodated. Since a large gear case is required, there is a problem that the transplant machine itself becomes large.

Therefore, in view of the above problems, it is an object of the present invention to provide a seedling vertical feeding mechanism capable of increasing the vertical feeding amount of seedlings while having a simple structure.

The seedling vertical feed mechanism of the present invention includes a seedling vertical feed belt that vertically feeds the seedling mat mounted on the seedling stand to the seedling take-out side.
A vertical feed operation member that rotates to operate the seedling vertical feed belt,
A first swing member that swings due to the rotation of the vertical feed operation member,
A second swing member that swings at a swing angle corresponding to the swing angle of the first swing member and rotates a belt drive shaft for driving the seedling vertical feed belt in the feed direction.
A link-type amplification mechanism provided between the first swing member and the second swing member and amplifying the swing angle of the first swing member is provided.

According to the seedling vertical feeding mechanism of the present invention, the amount of vertical feeding of seedlings can be increased while having a simple structure.

It is a left side view of the transplanting machine which concerns on this embodiment. It is a top view of the transplant machine which concerns on this embodiment. It is a left side view of a seedling planting device. It is a left side view of the seedling vertical feed mechanism. It is a left side view for demonstrating the structure of the seedling vertical feed mechanism. It is a figure which shows the state which the 1st rocking member rotated to the highest point. It is the left side view which shows the periphery of the planting part which concerns on other embodiment enlarged. It is the bottom view which shows the periphery of the planting part which concerns on other embodiment enlarged. It is the back view which shows the periphery of the planting part which concerns on other embodiment enlarged. It is a left side view for demonstrating the structure of the seedling vertical feeding mechanism which concerns on other embodiment. It is a figure which shows the state which the 1st rocking member which concerns on other embodiment rotated to the highest point. It is a figure which shows the relationship between the vertical feed rate of a seedling vertical feed belt and the free fall speed of a seedling mat which concerns on another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the traveling direction of the traveling aircraft 2 (left direction in FIG. 1) is referred to as the front, the left side in the traveling direction is simply referred to as the left side, and the right side in the traveling direction is simply referred to as the right side.

As shown in FIGS. 1 to 3, the transplanting machine 1 according to the present embodiment includes a traveling machine body 2, front wheels 1a and rear wheels 1b that support the traveling machine body 2, and a drive source mounted on the traveling machine body 2. It includes an engine) 1c and a transmission unit 1d that transmits the drive of the drive source 1c to each unit. Further, the transplanting machine 1 is provided with a seedling planting device 3 for planting seedlings behind the traveling machine 2. Then, the transplanting machine 1 travels forward when planting the seedlings.

The traveling machine body 2 includes a seat 2a for the operator to sit on, an operation unit 2b operated by the operator, and a spare mounting unit 2c for mounting a spare seedling mat. For example, the operation unit 2b includes a control handle for operating the traveling direction, a speed change lever for operating the traveling speed, and a working lever for operating the seedling planting device 3.

The seedling planting device 3 includes a planting section 4 for scraping and planting a part of seedlings from the seedling mat, and a seedling mounting device 5 on which the seedling mat is placed in order to supply the seedling mat to the planting section 4. ing. Since the seedling planting device 3 is rotatably connected to the traveling machine body 2, it moves up and down with respect to the traveling machine body 2.

The planting portion 4 is arranged below the seedling mounting device 5. The planting portion 4 is provided with a rotating planting claw 40, and the planting claw 40 is revolved to scrape a part of seedlings from a seedling mat located at the lower end of the seedling mounting device 5. Take and plant in the field.

The planting unit 4 is a planting input case 41 in which power is transmitted from the drive source 1c via the transmission unit 1d, and three sets for 6 rows (1 set in 2 rows) connected to the planting input case 41. It includes a transmission case 42 and a seedling planting mechanism 43 provided on the rear end side of each planting transmission case 42. The seedling planting mechanism 43 is provided with a rotary case 44 having two planting claws 40. By one rotation of the rotary case 44, two planting claws 40 cut and grab one seedling each and plant it in the field. Further, the planting portion 4 is provided with a soil covering ring 45 that holds down the soil after the soil is covered.

The seedling mounting device 5 includes a seedling stand 51, a seedling stand horizontal feed mechanism 79 that horizontally feeds the seedling stand 51, and a seedling vertical feed that vertically feeds the seedling mat on the seedling stand 51. It is provided with a feed mechanism 80. Since the seedling stand 51 is reciprocally moved laterally in the left-right direction by the seedling stand lateral feed mechanism 79, the seedling mat on the seedling stand 51 is continuously reciprocally transported laterally. On the other hand, when the seedling stand 51 reaches the reciprocating moving end, the seedling mat on the seedling stand 51 is intermittently vertically fed and conveyed by the seedling vertical feed belt 155 of the seedling vertical feed mechanism 80.

The seedling planting device 3 includes a planting frame 111 that connects the front ends of three sets of planting transmission cases 42 for 6 rows. The planting frame 111 extends in the left-right direction. A planting input case 41 is attached to the central portion of the planting frame 111. The planting input case 41 includes a horizontal feed shaft of the seedling stand horizontal feed mechanism 79 that feeds the seedling stand 51 in the left-right direction and a vertical feed mechanism 80 that vertically feeds the seedlings on the seedling stand 51. The feed drive shaft 80a and the planting output shaft of the seedling planting mechanism 43 are rotated.

A seedling stand horizontal feed mechanism 79 and a seedling vertical feed mechanism 80 are connected to the planting input case 41. The feeder 79a of the seedling stand lateral feed mechanism 79 is connected to the lower side of the back surface of the seedling stand 51, and laterally feeds the seedling stand 51 in the left-right direction along the upper rail 151 and the lower rail 152. Therefore, the seedling mat on the seedling stand 51 is continuously reciprocated and transported laterally.

Next, the configuration of the seedling vertical feeding mechanism 80 will be described with reference to FIGS. 4, 5A, and 5B. A pair of vertical feed drive cams 80b (corresponding to vertical feed operation members) are fixed to the vertical feed drive shaft 80a of the seedling vertical feed mechanism 80. The vertical feed drive cam 80b is constantly rotating together with the vertical feed drive shaft 80a, and when the seedling stand 51 reaches the reciprocating movement end (reciprocating movement turning point), each vertical feed drive cam 80b swings first. It comes into contact with the member 153. As a result, the seedling vertical feed belt 155 is driven via the amplification mechanism 154 described later, and the seedling mat on the seedling mounting table 51 is intermittently vertically fed and conveyed.

The amplification mechanism 154 is composed of a four-node link mechanism having a first rocking member 153, a second rocking member 156, and a connecting rod 157 connecting the first rocking member 153 and the second rocking member 156. Linkage. The first swing member 153, the second swing member 156, and the connecting rod 157 function as a drive link (driving link), a driven link, and an intermediate link, respectively.

The seedling vertical feed belt 155 is driven by the belt drive shaft 155a. The belt drive shaft 155a is arranged on the back surface of the seedling stand 51 on the lower end side via the lower bearing body 155b. A drive-side roller 155c around which the seedling vertical feed belt 155 is wound is fixed to the outer circumference of the belt drive shaft 155a.

A second swing member 156 is attached to the outer circumference of the belt drive shaft 155a via a one-way clutch (not shown). When the second swing member 156 rotates upward around the belt drive shaft 155a, the belt drive shaft 155a also rotates together with the one-way clutch, and the drive side roller 155c on the belt drive shaft 155a also rotates on the drive side. The seedling vertical feed belt 155 is driven in the feed direction by the roller 155c. The second swing member 156 rotates upward by a predetermined angle from the initial position shown in FIG. 5A, and then rotates downward by the urging force of the return spring 159 described later to return to the initial position. When the second swing member 156 rotates downward, the belt drive shaft 155a does not rotate due to the function of the one-way clutch. As a result, the seedling vertical feed belt 155 vertically feeds the seedling mat to the seedling take-out side at the lower end of the seedling mounting table 51 by a substantially constant amount.

The first swing member 153 swings around the first swing shaft 158a of the upper bracket 158. The upper bracket 158 is the back surface of the seedling mounting table 51 between the plurality of seedling vertical feed belts 155 arranged side by side in the left-right direction, and is fixed above the belt drive shaft 155a. A return spring 159 for urging the first swing member 153 in a downwardly rotating direction is provided on the outer peripheral side of the first swing shaft 158a. When the vertical feed drive cam 80b rotates upward and comes into contact with the tip end side of the first swing member 153, it is pressed by the vertical feed drive cam 80b and the first swing member 153 also rotates upward (FIG. 5B). reference). After that, when the rotating vertical feed drive cam 80b comes into non-contact with the first swing member 153, the first swing member 153 rotates downward due to the urging force of the return spring 159, and the initial stage shown in FIG. 5A. Return to position.

The first swing member 153 and the second swing member 156 are connected by a connecting rod 157. The connecting rod 157 is rotatably connected to the first swinging member 153 via the first connecting pin 157a and rotatably connected to the second swinging member 156 via the second connecting pin 157b.

The center-to-center distance L1 between the first swing shaft 158a and the first connecting pin 157a is longer than the center-to-center distance L2 between the belt drive shaft 155a and the second connecting pin 157b. Therefore, the swing angle of the second swing member 156 is larger than the swing angle of the first swing shaft 158a. As a result, the amplification mechanism 154 can amplify the swing angle of the first swing member 153. As a result, the swing angle of the second swing member 156 becomes large, and the rotation angle of the belt drive shaft 155a also becomes large, so that the vertical feed amount of the seedling vertical feed belt 155 can be increased.

The initial positions of the first swing member 153, the second swing member 156, and the connecting rod 157 shown in FIG. 5A are set by the regulating member 160 provided on the connecting rod 157. The regulating member 160 keeps the connecting rod 157 in the initial position by contacting the stopper rubber 162 provided on the stopper mounting portion 161 fixed to the lower rail 152.

The regulating member 160 includes a long nut 160a fixed to the end of the connecting rod 157, a regulating bolt 160b screwed into the long nut 160a, and a lock nut 160c for fixing the regulating bolt 160b. By rotating the regulation bolt 160b, the amount of protrusion of the regulation bolt 160b from the long nut 160a changes, so that the length of the regulation member 160 can be changed. As a result, the initial position of the connecting rod 157 can be changed, and at the same time, the initial position of the second swing member 156 can be changed. By changing the initial position of the second swing member 156, the swing angle (rotation angle from the initial position to the highest point) of the second swing member 156 can be changed. Therefore, the swing angle of the second swing member 156 can be adjusted by adjusting the length of the regulation member 160. That is, the regulating member 160 functions as an adjusting mechanism capable of adjusting the swing angle of the second swing member 156. By adjusting the swing angle of the second swing member 156, the rotation angle of the belt drive shaft 155a is also adjusted, and the vertical feed amount of the seedling vertical feed belt 155 can be adjusted.

As described above, the seedling vertical feed mechanism 80 of the present embodiment includes a seedling vertical feed belt 155 that vertically feeds and moves the seedling mat mounted on the seedling mounting table 51 to the seedling take-out side, and a seedling vertical feed belt 155 that rotates and moves. The vertical feed drive cam 80b, the first swing member 153 that swings by the rotation of the vertical feed drive cam 80b, and the swing angle corresponding to the swing angle of the first swing member 153. The belt drive shaft 155a for driving the seedling vertical feed belt 155 is provided between the second swing member 156 that rotates in the feed direction, the first swing member 153, and the second swing member 156. , A link-type amplification mechanism 154 that amplifies the swing angle of the first swing member 153.

Further, in the seedling vertical feed mechanism 80 of the present embodiment, the amplification mechanism 154 is a four-node link mechanism in which the first rocking member 153 and the second rocking member 156 are used as a drive link and a driven link, respectively.

According to the seedling vertical feeding mechanism 80 of the present embodiment, the amount of vertical feeding of seedlings can be increased while having a simple structure. As a result, even in the case of a seedling mat such as a vegetable seedling, which has a large amount of scraping with the planting claw 40, it can be reliably scraped one by one.

Further, in the seedling vertical feed mechanism 80 of the present embodiment, the amplification mechanism 154 adjusts the swing angle of the second swing member 156 to adjust the vertical feed amount of the seedling vertical feed belt 155 (adjustment). A mechanism) may be provided. According to this configuration, the vertical feed amount of the seedling vertical feed belt 155 can be changed depending on the type of seedling, so that the versatility is improved.

Further, in the seedling vertical feeding mechanism 80 of the present embodiment, the amplification mechanism 154 may be arranged between a plurality of seedling vertical feeding belts 155 arranged side by side in the left-right direction. According to this configuration, the seedling planting device 3 can be made compact.

6A to 6C are enlarged views of the periphery of the planting portion 4 according to another embodiment. Instead of the soil covering ring 45 of the above-described embodiment, plate-shaped soil covering members 140 are provided on both the left and right sides of the planting claw 40, respectively. By arranging the soil covering member 140 in the vicinity of the planting claw 40, the soil can be covered quickly after planting, and the planting posture is stabilized. In addition, it is possible to suppress the lifting of seedlings by the planting claw 40. By making the soil covering member 140 plate-shaped, the surface pressure can be suppressed in addition to being compact.

The soil covering member 140 is formed by processing a plate material with sheet metal. A resin member is attached or a resin coating is applied to the bottom surface of the soil covering member 140 to prevent the soil and the like in the field from sticking.

The soil covering member 140 is rotatably attached to a mounting bracket 141 fixed to the planting frame 111. The rotation fulcrum 140a of the soil covering member 140 is located in front of the planting claw 40. As a result, the soil covering load is stabilized and the soil covering performance is improved.

The front portion 140b of the soil covering member 140 is urged by the load adjusting spring 142 in a direction of rotating upward. One end of the load adjusting spring 142 is connected to the front portion 140b of the soil covering member 140, and the other end is connected to the mounting bracket 141. By appropriately setting the urging force of the load adjusting spring 142, the load applied to the soil covering member 140 can be adjusted. The left and right soil covering members 140 are independently supported by the mounting bracket 141 and urged by the load adjusting spring 142, respectively, and even if there is a soil mass, only one soil covering member 140 acts and the other soil covering member 140 operates. There is no effect on.

Further, a stopper screw 143 is provided in front of the rotation fulcrum 140a and above the soil covering member 140. The stopper screw 143 is fixed to the mounting bracket 141. The stopper screw 143 defines the lower limit position of the height of the rear end of the soil covering member 140 by contacting the upper surface of the soil covering member 140.

The rear portion 140c of the soil covering member 140 projects toward the planting claw 40 behind the bottom dead center of the planting claw 40 in a plan view, and the distance between the soil covering members 140 is narrowed (see FIG. 6B). .. As a result, the soil covering performance and the function of suppressing the lifting of seedlings are improved.

Further, the rear portion 140c of the soil covering member 140 is inclined so that the bottom surface faces the planting claw 40 (see FIG. 6C). As a result, the position can be adjusted to the optimum position according to the crop and field conditions.

FIG. 7A is a left side view for explaining the configuration of the seedling vertical feeding mechanism 80 according to another embodiment. As shown in FIG. 7A, the vertical feed drive cam 80b, the first swing member 153, and the upper bracket 158 according to the other embodiment have different shapes from those of the above-described embodiment. The seedling vertical feed mechanism 80 according to another embodiment is provided with an upper regulating member 170 that regulates the swing of the first swing member 153. The upper regulating member 170 may be provided in the seedling vertical feeding mechanism 80 according to the above-described embodiment.

The vertical feed drive cam 80b includes a first contact portion 800b that comes into contact with the first swing member 153 on the outer peripheral portion. The vertical feed drive cam 80b has a substantially fan shape, but is not limited to such a shape.

The first contact portion 800b includes a first contact end portion 801b arranged on the rear end side and a second contact end portion 802b arranged on the front end side. The distance of the first contact portion 800b from the center of the vertical feed drive shaft 80a increases as it advances from the first contact end portion 801b to the second contact end portion 802b.

The first swing member 153 includes a second contact portion 153a that contacts the first contact portion 800b. Then, the second contact portion 153a is in contact with the first contact end portion 801b to the second contact end portion 802b and is close to the upper regulation member 170 until the first swing member 153. Is shaped so that it can be rotated upward.

FIG. 7B is a diagram showing a state in which the first swing member 153 according to another embodiment is rotated to the highest point. As shown in FIG. 7B, the vertical feed drive is performed from the initial position where the first contact end portion 801b contacts the second contact portion 153a to the position where the second contact end portion 802b contacts the second contact portion 153a. The rotation angle of the cam 80b is the cam contact angle θ1. While the vertical feed drive cam 80b is rotating within the range of the cam contact angle θ1, the first swing member 153 is rotated upward.

FIG. 8 is a diagram showing the relationship between the vertical feed rate V1 of the seedling vertical feed belt 155 (see FIG. 4) and the free fall speed V2 of the seedling mat according to another embodiment. In the graph shown in FIG. 8, the vertical axis represents the vertical feed amount (distance) of the seedling vertical feed belt 155, and the horizontal axis represents time. The vertical feed time T1 is the time required for the seedling vertical feed belt 155 to vertically feed the seedling vertical feed amount W1 (pressed by the vertical feed drive cam 80b, the first swing member 153 rotates upward. Time), and the natural fall time T2 is the time required for the seedling mat to naturally fall the vertical feed amount W1.

When the maximum rotation speed of the vertical feed drive shaft 80a is 300 rpm and the vertical feed amount W1 is 30 mm, the cam contact angle θ1 is preferably 200 ° or more. It should be noted that such numerical values are examples and can be appropriately selected. The free fall speed V2 is the speed at which the seedling mat falls along the inclination of the seedling vertical feed belt 155 (without considering friction, air resistance, etc.).

According to the vertical feed drive cam 80b and the first swing member 153, the vertical feed time T1 may be longer than the free fall time T2 even when the vertical feed drive shaft 80a is rotating at the maximum speed. it can. As a result, it is possible to prevent the vertical feed speed V1 of the seedling vertical feed belt 155 from greatly exceeding the free fall speed V2 of the seedling mat, and prevent the seedling mat from slipping on the seedling vertical feed belt 155. it can. As a result, for example, the seedling mat is vertically fed only a distance shorter than the vertical feed amount W1, and the planting claw 40 (see FIGS. 6A to 6C) can prevent the seedling from being damaged.

The seedling vertical feed mechanism 80 according to another embodiment is not limited to the above configuration, and the vertical feed motor (not shown) for driving the vertical feed drive shaft 80a independently of the drive source 1c (see FIG. 1). ), And the vertical feed time T1 may be made longer than the natural fall time T2 by controlling the vertical feed motor.

The upper restricting member 170 includes an upper stopper mounting portion 171 fixed to the upper side of the upper bracket 158, and an upper stopper rubber 172 provided on the front side of the upper stopper mounting portion 171. As a result, when the first swing member 153 is pressed by the vertical feed drive cam 80b and rotates upward, it can return to the initial position shown in FIG. 7A by the urging force of the return spring 159 (see FIGS. 5A and 5A). The rotation of the first swing member 153 can be restricted within the rotation range.

As described above, in the seedling vertical feed mechanism 80 of the other embodiment, the seedling vertical feed belt 155 is intermittently vertically fed with a constant vertical feed amount W1, and the seedling vertical feed belt 155 transfers the vertical feed amount W1. The vertical feed time T1 required for the vertical feed movement is longer than the natural fall time T2 required for the seedling mat to naturally fall the vertical feed amount W1. This makes it possible to prevent the seedling mat from slipping on the seedling vertical feed belt 155.

Although the present invention and other embodiments have been described above with reference to the drawings, it should be considered that the specific configuration is not limited to these embodiments. The scope of the present invention is shown not only by the description of the above-described embodiment but also by the scope of claims, and further includes all modifications within the meaning and scope equivalent to the scope of claims.

1 Transplanter 3 Seedling planting device 40 Planting claw 51 Seedling stand 80 Seedling vertical feed mechanism 80b Vertical feed drive cam 153 1st swing member 154 Amplification mechanism 156 2nd swing member 155 Seedling vertical feed belt 155a Belt drive shaft 155c drive Side roller 160 Regulator W1 Vertical feed amount T1 Vertical feed time T2 Natural fall time

Claims (5)

A seedling vertical feed belt that vertically feeds and moves the seedling mat mounted on the seedling stand to the seedling take-out side,
A vertical feed operation member that rotates to operate the seedling vertical feed belt,
A first swing member that swings due to the rotation of the vertical feed operation member,
A second swing member that swings at a swing angle corresponding to the swing angle of the first swing member and rotates a belt drive shaft for driving the seedling vertical feed belt in the feed direction.
A seedling vertical feeding mechanism including a link-type amplification mechanism provided between the first swing member and the second swing member and amplifying the swing angle of the first swing member. The seedling vertical feeding mechanism according to claim 1, wherein the amplification mechanism is a four-section link mechanism in which the first rocking member and the second rocking member are used as a drive link and a driven link, respectively. The seedling vertical feed mechanism according to claim 1 or 2, wherein the amplification mechanism includes an adjustment mechanism capable of adjusting the swing angle of the second swing member to adjust the vertical feed amount of the seedling vertical feed belt. The seedling vertical feeding mechanism according to any one of claims 1 to 3, wherein the amplification mechanism is arranged between a plurality of the seedling vertical feeding belts arranged side by side in the left-right direction. The seedling vertical feed belt is intermittently vertically fed with a constant vertical feed amount.
The vertical feed time required for the seedling vertical feed belt to vertically feed the vertical feed amount is longer than the natural fall time required for the seedling mat to naturally drop the vertical feed amount, claims 1 to 1. The seedling vertical feeding mechanism according to any one of 4.

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