JPH0578281B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention includes a lifting and conveying means for receiving onions dug up by a front end digging portion and transporting them upward, and a lifting and conveying means for receiving onions dug up by a front end digging part and transporting the onions at the upper part of the lifting and conveying path. A holding and conveying means arranged in parallel at a predetermined pitch on a rotating body that circulates and rotates a pair of openable and closable conveying tools held in a holding state, and onion leaves protruding from between the two conveying tools in the holding and conveying path. The present invention relates to an onion harvesting machine equipped with a leaf cutting device that cuts the stem.

[Conventional technology]

In this type of onion harvester, the holding and conveying means is configured such that one of the conveying tools is fixed to the rotating body, and the other is held in a position in which the onion is held in a position relative to the fixed conveying device. A movable carrier that can be switched to a hugging and holding position is formed, and a guide mechanism for regulating this movable carrier to the hugging and holding position is made of a steel plate (for example, Japanese Patent Application No. 1983-
28692, Figure 1).

[Problem that the invention seeks to solve]

When the guide mechanism is made of steel in this way, the relative posture of the movable carrier with respect to the fixed carrier in the holding position is regulated to a constant state.
There is no problem when holding an onion that is suitable for being held by both conveyors, but when an onion that is larger than that is held, the movable conveyor presses against the onion and comes into contact with it. This will damage the onion, and if a smaller onion is held, the movable conveyance tool will not come closer to the fixed conveyance tool than in the holding position, so the gap will make it impossible to securely hold the onion. There was a time when I couldn't do it and had to drop the onion.

An object of the present invention is to provide a guide mechanism with improved holding ability by simply modifying the guide mechanism.

[Means for solving problems]

A feature of the present invention is that the guide mechanism is made of an elastic body, and its effects are as follows.

[Effect]

For example, when the guide mechanism is not elastically deformed, a movable carrier whose posture is regulated by the guide mechanism can be brought closer to a fixed carrier than before to hold smaller onions, and larger onions can be held. On the other hand, the guide mechanism elastically deforms to separate the movable conveyor from the fixed conveyor, and does not apply a holding force that would press and damage the onions.

Therefore, by the amount of elastic displacement of the guide mechanism,
No matter the size of the onion, it can be maintained in the desired state.

〔Effect of the invention〕

As a result, it has become possible to hold onions in the desired state (with appropriate holding force) regardless of their size, and it has become possible to improve adaptability to onions that vary in actual size.

〔Example〕

As shown in FIG. 4, the onion harvester A is connected to the rear end of the tractor B via a three-point link device C, and has an digging section 1 for digging up onions a, and an onion harvesting machine A for digging up onions a. It is composed of a conveyance and recovery section 2 that conveys the information.

The digging section 1 includes a rake-like digging blade 3 that digs up and picks up onions a in the field, and a digging blade whose digging depth is set according to a gauge theory 40. It consists of a frame 4 that supports 3 so as to be swingable back and forth around the horizontal axis X, and a drive frame 5 that drives the support frame 4 to swing. On the other hand, to configure the transmission system to the digging section 1, the input transmission case 6 on the side of the harvester A and the tractor BPTO shaft 7 are connected for transmission, and a transmission shaft 9 is provided sideways protruding from the input transmission case 6. In addition, eccentric cams (not shown) are attached to both ends of the horizontal transmission shaft 9, and the base end of the drive frame 5 is fitted onto the eccentric cam, and the drive frame 5 is driven by the eccentric cam. The support frame 4 is swung back and forth, and the digging blade body 3 is
The onion a is dug up while being shaken.

Next, the transport and recovery section 2 will be explained. This conveyance and recovery section 2 includes a first conveyor 10 that receives the dug onions a and conveys them rearward, and this first conveyor 1
a second conveyor 13 consisting of a lifting conveyance means 11 that receives onions a from 0 and transfers them upward; a holding conveyance means 12 that holds them in a holding state at the upper part of the lifting conveyance path c; A leaf cutting device 14 that cuts the leaf and stem part b of the onion a held by the onion 12, and a collecting unit 1 that collects the onion a from which the leaves have been removed.
5.

The second conveyor 13 will be explained in more detail. 1st
As shown in the figure, the second conveyor 13 has a chain (endless rotating body) as a rotating body 16 that extends continuously between the lifting conveyance path c in a substantially vertical position and the holding conveyance path d in a horizontal position. A pair of left and right chains 16, 16 are tensioned with appropriate tension applied by a tensioning mechanism 45, and a large number of horizontal conveyance rods 17 are installed across the pair of left and right chains 16, 16. As shown in FIGS. 1 and 3, these transportation rods 17 are divided into two sets of three rods each.
The ones 7A, 17B, and 17C are arranged at the apex position of a substantially L shape when viewed from the side and are fixed to the chains 16, 16. The three rods 17A, 17B, and 17C arranged in an L shape constitute a fixed conveyor 18 that receives and conveys the onion a. To explain in detail the connection structure of this fixed conveyor 18 to the chain 16, as shown in FIG. 3, a plate member 41 is fixed to the first link 16A of the chain 16, and the left and right plate members 41, 1st for 41 years
Rod 17A is installed. This first rod 1
7A, two other second and third rods 17B and 17C are arranged at the apex position of the L-shape to form a substantially L-shape in side view, and the second rod 17B is connected to the second rod 17B at both bent ends. The third rod 17C is fixed to the plate member 41 at both bent ends. This fixed conveyor 18 is connected to the chain 1
By arranging them in parallel at a predetermined pitch for 6,
Lifting means 11 for receiving onion a and transporting it upward
It is structured as follows. In addition, in this lifting means 11, the posture regulating mechanism for hanging down the leaf-stem part b toward the front is performed separately. On the other hand, the other set consisting of three transport rods 17D, 17E, and 17F has three rods 17D, 17E, and
17F, and both ends of the fourth rod 17D are fitted and held in a bearing holder portion 42 fixed to the second link 16B of the chain 16. A fifth rod 17E and a sixth rod 17F are connected and fixed in a predetermined position to the fourth rod 17D by a joint member 42A having a substantially L-shaped cross section, and roller-shaped cam followers 43 are attached to both ends of the sixth rod 17F. is installed. A cam rail 8 as a guide mechanism is protruded from the inner surface of the side plates 20, 20 that support the chains 16, 16, and serves as a guide for the cam follower 43. Therefore, by moving this cam follower 43 while being guided by the cam rails 8 provided along the transport paths c and d, the fifth rod 17E and the sixth rod 17F are moved around the axis of the fourth rod 17D. A movable conveyor 19 is constituted by swinging. This movable conveyor 19 is located between the fixed conveyors 18 and 18 arranged in parallel on the chain 16 at a predetermined pitch, and forms a pair with the fixed conveyor 18 on the rear side in the conveyance direction to hold the onions a. It constitutes a pair of carriers that can be opened and closed.

As shown in FIG. 1, this movable carrier 19 is
In the lifting conveyance path c, the cam follower 43 is held by a chain link and is therefore in an open position, and the onion a is supported and conveyed by the fixed conveyance tool 18. When the onion a reaches the upper part of the lifting and conveying path c, the cam follower 43 passes through the guide portion 8a formed by the pair of upper and lower cam rails 8, so that the movable conveying tool 19 changes its posture and transfers to the fixed conveying tool. 18 and the onion a are held in a closed position. The cam rail 8 is located at the bending portion leading to the holding and conveying path d following the guide portion 8a.
is formed by a rubber plate 8b, and a sponge 8c is pasted on the inside of the rubber plate 8b.
The guide function prevents the movable conveyor 19 from abruptly changing its posture and impactingly pressing against the onion a, and also prevents the movable conveyor 19 from suddenly changing its posture and pressing against the onion a. Absorbs vibrations caused by posture changes of the movable carrier 19, reduces vibration noise, and reduces the impact of the cam rail 8 of the cam follower 43.
It is possible to prevent contact damage. In the holding conveyance path d, the cam follower 43 is restricted from swinging toward the open side by the cam rail 8, and the movable conveyance tool 19 maintains the closed posture holding the onion a until the discharge position e to the collecting section 15. .

In the up-and-down reversal path d' of this holding and conveying path d, the cam rail 8 is formed of an elastic body 8d such as a leaf spring or a rubber plate, and by elastic deformation, the movable conveyance tool 19 holds the onion according to the onion a. You can expect it to work. At the release position e, the guidance by the cam rail 8 is released, and the cam follower 43 is no longer supported at this position, so the movable conveyor 19 swings toward the open side due to its own weight, and
Onion a is discharged onto a falling chute 34, which will be described later. The fixed conveyance device 18 and the movable conveyance device 19 are attached to the same chain 16, and the holding conveyance means 1
2.

As shown in FIG. 4, the first conveyor 10 and the second conveyor
To explain the transmission structure for the conveyor 13,
The first chain transmission mechanism 2 is connected to the drive shaft 23 of the first conveyor 10 from the horizontal transmission shaft 9 via the relay shaft 22.
4, and a second chain mechanism 26 is stretched across the drive shaft 23 of the first conveyor 10 and the drive shaft 25 of the second conveyor 13.

Next, the leaf cutting device 14 will be explained in detail. Fourth
As shown in the figure and FIG. 5, the leaf cutting device 14
is equipped with a clipper-shaped cutting blade 31, and is arranged at a portion where the leaf-stalk portion b of the onion a hangs down, and is configured to cut the leaf-stalk portion b of the onion a being conveyed. The position where the leaf and stem part b of the onion a hangs is a position corresponding to the return path where the holding and conveying tools 18 and 19 are turned upside down and moved to the return path on the lower side. To explain the drive structure of this leaf cutting device 14, as shown in FIG. 4 and FIG. A cam 29 is attached so as to be integrally rotatable, and a connecting rod 30 that is driven up and down by the cam 29 is connected to the cam 29.
It is loosely fitted. On the other hand, a drive rod 32 for driving and sliding the movable blade is provided on the leaf cutting device 14 side, and this drive rod 32 and a connecting rod 30 are interlocked and connected via a bell crank 33.

The collecting unit 15 is located on the conveying rear (tractor) side of the leaf cutting device 14, and collects onions a with the leaf and stem parts b cut off.
A falling chute 34 that receives the onions, and collection boxes 35, 35 that collect the onions a from the falling chute 34.
and are placed on both side stands 36. The drop chute 34 is attached to a support shaft 3 along the longitudinal direction of the aircraft.
7, and by rotatably supporting this support shaft 37, it is pivotally supported to be able to swing up and down around the support shaft 37, and in the working position, onion a is selectively placed in one of the left and right collection boxes 35. is installed in a downwardly inclined position to throw in the waste, and when it is to be thrown into the collection box 35 on the opposite side, the inclined position is artificially changed.
A drive arm 38 having an eccentric cam hole is loosely fitted into the outwardly projecting end of the support shaft 37. A configuration is adopted in which the power is branched to give vibration to the falling chute 34, thereby promoting the falling of the onions a.

[Another example]

B. Although the fixed conveyor 18 is also used as the holding and conveying means 12, a dedicated conveyor that can be opened and closed may be provided as the holding and conveying means 12.

○B The drive means for the transport tool does not need to be the chain 16, but a drum-shaped rotating body is provided as a rotating body, and a large number of holding and transporting tools that can be opened and closed are provided on the outer circumferential surface of this drum-shaped rotating body. You can also configure it.

○C Cam rail 8 along the entire length of the holding conveyance path d
may be made of an elastic body.

○D The elastic body may be made of resin.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the onion harvesting machine according to the present invention, and FIG. 1 is a side view showing a lifting conveyance path and a holding conveyance path, and FIG. Side view shown, third
The figure is a front view showing the lifting and conveying means and the holding and conveying means, FIG. 4 is an overall side view, and FIG. 5 is an overall rear view. 1... Excavation part, 8... Guide mechanism, 11...
Lifting conveyance means, 12...Holding conveyance means, 14
...Leaf cutting device, 16...Rotating body, 18...Fixed carrier, 19...Movable carrier, a...Onion, b...
...Leaf and stem portion, c...Lifting conveyance route, d...Holding conveyance route.

Claims (1)

[Claims] 1. A lifting and conveying means 11 that receives the onion a dug up by the front-end digging part 1 and transports it upward, and a pair of lifting and conveying means 11 that can be opened and closed to hold the onion a in the upper part of the lifting and conveying path c. Transport tool 18,1
A holding conveyance means 12 arranged in parallel at a predetermined pitch on a rotating body 16 that circulates and rotates the holding conveyance means 12, and a holding conveyance path d.
The onion harvesting machine is equipped with a leaf cutting device 14 for cutting the leaf and stem part b of the onion a protruding from between the two conveying tools 18 and 19, the onion harvesting machine comprising:
One 18 of 8 and 19 is fixed to the rotary body 16, and the other 19 is a movable carrier 19 that can be switched between a posture of holding and holding the onion a with respect to the fixed carrier 18, and a non-cracking and holding posture. The onion harvesting machine has a guide mechanism 8 formed of an elastic body for regulating the movable conveyance tool 19 to a holding posture.