JPS631785Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of a transmitter that emits ultrasonic waves towards the ground and a receiver that receives the reflected waves in order to detect the height of the reaping device above the ground in order to control the cutting height. The present invention relates to a reaping harvester in which an ultrasonic sensor comprising: is provided behind a weeding tool at the front end of the reaping device.

In conventional combine harvesters of this kind, it is necessary to detect the height of the front end of the reaping device from the ground to prevent it from plunging into a high place on the ground. It was installed behind the weeding tool installed at the tip of the device.

The transmitter and receiver were installed side by side on the left and right, but because the width of the weed culling tool itself was not very large, the transmitter and receiver had to be installed close to each other. As a result, the ultrasonic waves emitted from the transmitter may be short-circuited and received by the receiver, resulting in erroneous detection.

This invention was made with the aim of solving this problem, and its feature is that a partition member is used to separate the transmission and reception sound wave paths of the ultrasonic sensor into left and right sides, respectively. It is fixedly attached to the support frame of the tool.

According to the above configuration, the emitted sound waves will not be short-circuited to the receiver and received, thereby preventing malfunctions.Moreover, since the partition wall member is provided on a strong weeding implement support frame, the partition wall member can be installed easily. Even if the bulkhead member is thin, the emitted sound waves will not resonate and pass through, allowing the receiver to detect only the reflected waves from the ground and accurately detect the height above the ground. It became.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a reaping device 1 at the front of a combine as a reaping and harvesting machine. A weeding tool 5 is provided. The lower end of the weeding tool 5 is fixed to a support frame 7 connected to the body frame 6. Then, as shown in Figures 2 and 3,
A plate member 8 whose front end is fixed to the back of the weeding tool 5 and whose lower end is fixed to the upper part of the support frame 7 is provided, and a transmitter of an ultrasonic sensor 9 for detecting the height above the ground is provided on the left and right sides of the upper part of this member 8. 10 and a receiver 11 are attached respectively.

The transmitter 10 of the ultrasonic sensor 9 emits ultrasonic waves towards the ground, and the receiver 11 receives the reflected waves, and measures the time from when the ultrasonic waves are emitted to when they are received. Accordingly, the height of the reaping device 1 above the ground is detected. The reaping device 1 is then automatically raised and lowered based on the detected height above the ground, thereby automatically controlling the reaping height.

The plate member 8 functions as a partition member that separates the sound wave passages of the transmitter 10 and the receiver 11 into left and right sides at the upper part of the support frame 7, and thereby 7 is prevented from being received by the receiver 11, so that the receiver 11 can reliably receive only the reflected waves from the ground.

In addition, since the plate member 8 has its ends fixed to the weeding tool 5 and the support frame 7, it also functions as a reinforcing member for the weeding tool 5 and the support frame 7, respectively, compared to the conventional one. , the strength of the weeding tool 5 and the support frame 7 is significantly improved.

Furthermore, since the back part of the weeding tool 5 and the upper part of the support frame 7 are separated into left and right sides by the plate-like member 8, it is possible to prevent straw or mud from getting entangled in the weeding tool 5 or the support frame 7. This also makes it possible to further reduce malfunctions of the ultrasonic sensor 9.

[Brief explanation of the drawing]

The drawings show an embodiment of the reaping harvester according to the present invention, in which FIG. 1 is a front side view of the combine, FIG. 2 is a side view of the main part, and FIG. 3 is a perspective view of the main part. DESCRIPTION OF SYMBOLS 1... Reaping device, 5... Weeding tool, 7... Support frame, 8... Partition member, 9... Ultrasonic sensor, 10...
Transmitter, 11...receiver.

Claims (1)

[Scope of utility model registration request] In order to detect the height of the reaping device 1 above the ground in order to control the cutting height, an ultrasonic sensor 9 consisting of a transmitter 10 that emits ultrasonic waves towards the ground and a receiver 11 that emits the reflected waves is used. , a reaping/harvesting machine installed behind the weeding device 5 at the front end of the reaping device 1, in which a partition member 8 that separates the receiving and transmitting sound wave passages of the ultrasonic sensor 9 into left and right sides, respectively, is used to separate the weeding device 1 from the weeding device 1. A reaping harvester characterized in that it is fixed to a support frame 7 of a tool 5.