JP2595983Y2 - Mounting structure of ground height detection device in combine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a mounting structure of a ground height detecting device for detecting the ground height of a pre-cutting device in a combine and controlling the vertical movement of the pre-cutting device based on the detection result. It is about.

[0002]

2. Description of the Related Art A mechanical sensor provided with a contact portion that comes into contact with the ground as a cutting height detecting device for a combine that has been frequently used in the past has been damaged by foreign matter coming into contact with the ground portion of the grain stalk. There was a drawback that it was easy to do. On the other hand, recently, non-contact type ultrasonic sensors have been frequently used.

[0003] As a place where the ultrasonic sensor is mounted on the pre-cutting device, for example, as disclosed in Japanese Patent Publication No. 63-32410, the rear side of a weeding body located at the forefront end of the pre-cutting device. A type in which an ultrasonic sensor is arranged between the apparatus and the culm raising device,
As disclosed in Japanese Patent No. 7516 and Japanese Utility Model Application Laid-Open No. Sho 60-174523, the weeds are supported on the front end side of a front and rear longitudinal support frame for supporting the lower end side of the culm raising device in the pre-cutting device. On the other hand, on the support frame, a long cutting blade is mounted on the support frame behind the culm raising device, and on the left and right sides of the traveling machine body, between the cutting front blade and the culm raising device. There has been a type in which a transmitter and a receiver in an ultrasonic sensor are mounted via a bracket so as to straddle a support frame on the left and right.

[0004]

However, due to the structure of the combine, the herbaceous plant and the culm raising device are arranged in an inclined manner such that the lower end side thereof is in front of the traveling direction of the traveling body, and the herbaceous body goes to the upper end thereof. In accordance with the above, the inclination angle is sharp so as to approach the front of the device for raising the grain stem.
In addition, in the case of the ultrasonic sensor, it is necessary to install the ultrasonic sensor at a height position that is far away from the ground to be measured in order to sufficiently ensure measurement accuracy. In order to take enough height, if an ultrasonic sensor is installed on the upper end side of the back of the herbaceous body, the transmitted wave and / or the received wave of the ultrasonic sensor tend to interfere with the tine caused by the culm causing device, Momentum, the installation location of the ultrasonic sensor is caused by raising the grain culm and it is installed at a low position away from the device, which has the disadvantage that measurement accuracy cannot be sufficiently ensured, and the installation location is also limited. there were.

On the other hand, in the latter type, the above-mentioned problem can be solved. However, in the above-mentioned prior art, the transmitter and the receiver of the ultrasonic sensor are arranged so as to straddle the right and left above the support frame, so that the Ultrasonic waves transmitted toward the ground and reflected waves from the ground easily interfere with each other at the support frame, and the measurement accuracy of the height to the ground is extremely poor. Moreover, the vertical piece integrally attached with the transmitter and the receiver is screwed to the rear end of the partition plate extending rearward along the axis of the frame on the upper surface of the support frame, and the vertical piece, the partition plate and Has to be screwed to the front end side of the partition plate to cover the cover from above, so that there is a problem that the work of mounting the ultrasonic sensor is extremely time-consuming.

Further, in any of the above prior arts,
Also, the vertical side edge of the partition plate has the partition width
Since it was formed to spread toward
Fired downwards from the transmitter at the ground
Where the ultrasonic waves were constrained by the partition plate
Reduces the diffraction phenomenon of sound that occurs when suddenly opened
The measurement effect cannot be improved.
There was a problem that.

The present invention is directed to a type in which a non-contact type detection device such as an ultrasonic sensor is provided behind a grain culling device in a pre-cutting device, and a mounting structure of a ground height detector device which solves the above-mentioned problem. It is intended to provide.

[0008]

In order to achieve the above object, the mounting structure of the ground height detecting device in the combine according to the present invention is designed to raise a grain stalk in a cutting pretreatment device which is mounted on a front portion of a traveling body so as to be able to move up and down. At the front end of the support frame extending in the front-rear direction of the traveling body in the mowing pre-processing device, in a combine provided with a detection device of the ground height comprising a non-contact type transmitter and a receiver behind the device,
A horizontal frame for supporting a portion near the lower end of the back surface of the grain culm raising device is provided in a horizontal direction in the traveling direction of the fuselage, and a substantially horizontal support bracket projecting to the rear side of the horizontal frame includes the support frame and the left and right. Running in the area surrounded by
A vertical plate is detachably mounted so as to extend in the forward and rearward directions of the fuselage, and the vertical plate has a transmitter in the detection device.
The receiver and the receiver should be installed at appropriate intervals in the front-rear direction of the traveling aircraft, and
The vertical plane is traveling between the transmitter and the receiver below the traveling aircraft
A partition plate is fixed to the front and rear direction, and
The width of the vertical edge is reduced downward.
It is characterized by being formed in an inclined shape as described above .

[0009]

FIG. 1 is a side view of a combine, FIG. 2 is a front view of the combine, and a hydraulic cylinder (not shown) is provided in front of a traveling body 1 of the combine. The cutting pre-processing device 2 is mounted so as to be able to move up and down, and the cutting pre-processing device 2 has a grain stem raising device 3 having a lower end arranged forward and an upper end inclined rearward, and a weeding body 4 in front of the lower end. And a cutting blade 5 at the lower rear of the grain stem raising device 3 and a grain stem conveying device 6.

On the back side of the grain stem raising device 3,
A support frame 7 for supporting the horizontally elongated cutting blade 5 is disposed so as to extend before and after the traveling of the traveling machine body. A front end of the support frame 7 includes a vertical portion 8a and a horizontal portion 8b extending left and right in the traveling direction. The horizontal frame 8 is fixed to the horizontal frame 8, and a portion closer to the lower portion on the back side of the device 4 for raising the grain stem is fixed to the horizontal portion 8 b of the horizontal frame 8 via the mounting piece 9.

The horizontal flange 11 fixed to the lower end of the vertical portion 8a of the horizontal frame 8 is fitted with the same horizontal flange 12 fixed to the upper end of the L-shaped weeding frame 13, and the bolt 14 is fixed thereto. The weeds 4 are attached via the attachment pieces 15 and 16 attached to the lower horizontal portion 13a of the grass frame 13. Reference numeral 17 shown in FIG.
7a and a receiver 17b are ground height detecting devices each comprising an ultrasonic sensor mounted in a pair of cylindrical portions 18a and 18b of a synthetic resin case 18, respectively.
The horn portions 19a and 19b integrally formed on the lower end side of the base are opened toward the ground 30 below.

Each horn 1 of the transmitter 17a and the receiver 17b is attached to the lower portion of the vertical plate 20 attached to the vertical board of the case 18 of the detection device 17 and fixed with the screw 21.
A vertically long partition plate 22 for vertically partitioning the lower portions of 9a and 19b is fixed by welding or the like. A horizontal mounting portion 23 bent horizontally from the lower end of the vertical plate 20
Into the substantially horizontal support bracket 24 protruding from the rear surface of the horizontal portion 8 b of the horizontal frame 8.
Attach the bolt 25 and attach it detachably.

At this time, the vertical plate 20 is connected to the support frame 7.
Are arranged along the longitudinal direction (the traveling direction of the traveling body), and the detecting device 17 is in a plan view (see FIG. 5).
The transmitter 17a and the receiver 17b of the detection device 17 are arranged side by side in the front and rear direction of travel of the traveling machine 1 in a position surrounded by the vertical plate 20 and the support frame 7.

On the lower surface of the support bracket 24, there is attached a grain stem detector 28 in which a detection rod 27 extends in a direction that does not interfere with a transmitted wave or a received wave of the detection device 17. With this configuration, the detection device 17 is attached to the vertical plate 20 in advance, and the vertical plate 20 is bolted to the substantially horizontal support bracket 24 protruding from the rear surface of the horizontal portion 8 b of the horizontal frame 8. Just by stopping, the detection device 17 can be attached to a predetermined location extremely easily. The detection device 17 attached to the vertical plate 20
Is protected by the horizontal portion 8b of the horizontal frame 8 on the front side in the traveling direction of the traveling body 1 in plan view (see FIG. 5),
Further, by arranging the detection device 17 in a space surrounded by the front and rear longitudinal support frame 7 and the substantially horizontal support bracket 24 protruding from the rear surface of the horizontal portion 8b of the horizontal frame 8, the grain culm can be detected. Can be prevented, and the grain stalk that passes when measuring the height to the ground 30 with the detecting device 17 is not obstructed. In addition, since the detecting device 17 can be arranged at a position higher than the ground 30 as compared with the conventional one in which the detecting device is arranged on the back side of the weeding body 4, the measurement accuracy of the ground height is remarkably improved.

The vertical side edge 29 of the partition plate 22
4 and 6, as shown in FIGS. 4 and 6, the horn portion 19a of the transmitter 17a is downwardly fired toward the ground 30 by forming the partition width H such that the partition width H becomes shorter. When the ultrasonic wave is restrained by the partition plate 22 and is suddenly released at the side edge 29, the sound diffraction phenomenon that occurs is reduced, and the dissipation of the sound energy toward the ground 30 is reduced. Measurement effect can be improved.

[0016]

As described above, according to the present invention, according to the present invention, a non-contact type transmitter is provided at the rear of the culm raising device in the mowing pretreatment device which is attached to the front of the traveling body so as to be able to move up and down. In a combine provided with a detector for detecting the height of the ground comprising a receiver, the front end of the support frame extending in the front-rear direction of the traveling machine in the mowing pretreatment device has a portion close to the lower end of the back surface of the grain raising device. provided transverse frame for supporting the transverse traveling direction of the aircraft, to a substantially horizontal supporting bracket which projects on the rear side of the transverse frame, at the site surrounded by the left and right and the support frame, running
A vertical plate is detachably mounted so as to extend in the forward and rearward directions of the fuselage, and the vertical plate has a transmitter in the detection device.
The receiver and the receiver should be installed at appropriate intervals in the front-rear direction of the traveling aircraft, and
The vertical plane is traveling between the transmitter and the receiver below the traveling aircraft
Since the partition plate that partitions the front and rear direction is fixed ,
The detection device can be attached to a predetermined location extremely simply by mounting the detection device on a vertical plate in advance and bolting the vertical plate to a substantially horizontal support bracket projecting from the rear surface of the horizontal frame.

The detecting device mounted on the vertical plate is protected by a horizontal portion of a horizontal frame on the front side in the traveling direction of the traveling body in plan view. By placing the detection device in a space surrounded by a substantially horizontal support bracket protruding from the ground, it is possible to prevent the cereal stalk from passing through the location of the detection device, and measure the height to the ground with the detection device When passing through, the stalks that pass through will not be in the way.

Further, the transmitter and the receiver of the detecting device do not straddle the supporting frame which is long in the front-rear direction as in the related art, so that the interference of the detection wave by the supporting frame can be eliminated. In addition, since the detecting device can be arranged at a higher position with respect to the ground than the conventional one in which the detecting device is arranged on the back side of the herbaceous body, the measurement accuracy of the ground height can be remarkably improved.

Further , in the present invention, the partition plate
The longitudinal side edges, a partition width downward shorter that
The ultrasonic waves emitted downward from the transmitter toward the ground are restrained by the partition plate, but are suddenly released at the side edges of the partition plate. There is an effect that the diffraction phenomenon of the sound that occurs sometimes is reduced, and the dissipation of the sound energy toward the ground can be reduced to improve the measurement effect.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a front view of the combine.

FIG. 3 is an enlarged side view of a main part.

FIG. 4 is a view taken in the direction of arrows IV-IV in FIG. 3;

FIG. 5 is a plan view taken along the line VV of FIG. 4;

FIG. 6 is a perspective view of a detection device and a mounting structure thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Running body 2 Cutting pre-processing device 3 Grain culm raising device 4 Weeding body 5 Cutting blade 7 Supporting frame 8 Horizontal frame 8b Horizontal part 17 Detector 17a Transmitter 17b Receiver 18 Case 19a, 19b Horn part 20 Vertical plate 22 Partition plate 24 Support bracket 29 Side edge

Claims (1)

(57) [Scope of request for utility model registration] 1. A device for detecting the height of the ground, comprising a non-contact type transmitter and a receiver, provided behind a device for raising a culm in a pre-cutting device for cutting which is attached to a front portion of a traveling body so as to be able to move up and down. In the combine, at the front end of the support frame extending in the front-rear direction of the traveling body in the harvesting pretreatment device, a horizontal frame for supporting a portion near the lower end of the back surface of the grain raising device is provided in a lateral direction in the traveling direction of the body. On the substantially horizontal support bracket projecting to the rear side of the horizontal frame, a vertical plate is detachably mounted so as to extend in the front and rear direction of travel of the traveling body at a portion surrounded by the support frame and left and right, in said detecting apparatus to said longitudinal plate
Transmitter and receiver are separated from each other in the longitudinal direction of the
Wearing on the vertical plate below the transmitter and receiver
A partition plate is fixed to the front and rear of the body in the direction of travel,
The width of the vertical side edge of the board is
A mounting structure of a ground height detecting device in a combine, wherein the mounting structure is formed to be inclined so as to be shorter .