DE19718110A1 - Safety system for agricultural machine - Google Patents

Abstract

The agricultural machine e.g. harvester, haymaker etc. is fitted with conventional guards (20,21) with trip function to cut off the drive if an obstruction is encountered. The improvement has additional sensors to protect the rear of the machine when the machine is working. The sensors include proximity sensors (9) and mechanical trips (8). The rear safety system operates a warning if the sensors are tripped. The warning can be acoustic or visual and increases in effect as the working sections are approached, until the safety cut-out is tripped.

Description

The invention relates to a movable farmer social harvesting machine, especially on a hay advertising machine with the features of the generic term of Claim 1.

Such haymaking machines are because of the moving ones Working tools at work or at the booth Dangers as far as possible through mechanical protective devices lines, such as protective bars or the like, secured.

When driving over the processing area, this becomes a achieved a very significant reduction in the risk of accidents.

Because the moving work tools are not protected on all sides can be saved, e.g. B. for tedders and tedders, with rake tines protruding from the ground the rake wheels, even when the machine is at a standstill can be moved is the attachment of a complete all-round mechanical protection is not possible.

It is known the agricultural harvesters type mentioned with a sensor for detection of people and animals when approaching  the moving tools in a monitored room over the Submitting an electrical signal the drive for the the machine's moving tools.

Because of this, it is sufficient to stop the moving tools large kinetic energy the time available out when you get injuries to the approaching person and moreover, damage to the shutdown parts of the Machine, especially on couplings between the drives cut the drive train, wants to avoid.

The object of the invention is an agricultural harvest machine of the type mentioned with a device provided that the moving tools of the Ma seems to be approximate or in the danger zone Person, animal or an object moved by a person is caused to stop looking at the source of danger approach, but the warning area and thus the danger area to leave.

This task is performed on a machine of the type mentioned the preamble of claim 1 with the features of the kenn Drawing part of claim 1 solved. The Unteran sayings relate to particularly advantageous developments of the Invention and, like claim 1, simultaneously form one Part of the description.

With the described arrangement of sensors and warning area It is possible to achieve a high level of warning security. It is important that no warning signals through obstacles are triggered unintentionally and that the Protection over the entire width of the machine trigger sensitivity is the same, which is why a arrangement of sensors on both sides is advantageous.  

The use of a converter device enables a A plurality of warning devices also of different types at any location.

The installation of warning devices on the towing vehicle enables an effective warning of the operator to make.

The formation of several graded warning areas results an effective rejection effect, the sensors correspond according to the design of the warning area or warning beam rich can be selected and for the side Protection only mechanical sensors come into question.

The training of the warning devices as acoustic and as optical warning devices reinforce the rejection effect significant.

The sensors are primarily designed as motion detectors to recognize the approach.

It is advantageous if the warning areas cover a specific area Keep a safe distance from the moving tools thereby gaining a greater response and response time.

The design of the warning areas, as in the claims are a very convenient arrangement for successive warning areas, in each of which warning signals are released with increasing intensity and frequency, with increasing duration of stay in a warning area can be reinforced by rejection still improve.

Especially with haymaking machines and especially with the the relatively fast running tedding machine is Use of good warning protection is advantageous.  

With the triggering of warning signals, the Ab circuit made with a clutch in the drive train be, the shutdown on the occurring me mechanical load in the drive train is to be matched.

The invention is based on the drawing of an embodiment form described.

1 to a towing vehicle is an agricultural harvesting machine 2, in the form of a hay-making machine, connected to a pulling device. 5 The pulling device 5 is attached to a machine frame 4 which extends transversely to the direction of travel 10 of the machine and on which several rake wheels are mounted next to one another, with their moving work tools 3 , 3 ', rotatably driven in alternating rotation.

To the front and to the side, the work tools 3 , 3 'are shielded from the inner protective bar 20 and from the outer protective bar 21 with a half covering.

On the machine frame 4 are attached laterally outwards up to the lateral boundary of the outer protective bracket 21 sensor carrier 6 , on each of which a rear-extending mechanical sensor 8 , 8 ', in the form of a rod, is attached, which is about an upright axis is pivotally attached and is mechanically connected to an electrical switch 16 , which switches it on and off on rotation, which is connected via an electrical connection 17 to a conversion device 18 which converts the electrical impulses obtained into electrical warning signals for acoustic warning devices 14 , such as horns and for optical warning devices 15 , such as flashing lights 15 , formed and forwarded to them via electrical signal lines 19 .

At the rear end of the mechanical sensor 8 , 8 ', a field sensor 9 , 9 ' is attached, which consists of several partial sensors, which are an external warning area 11 , which in the case of the drawn machine with uncovered moving working tools 3 , 3 'Extends straight to the rear and is limited to the front to run obliquely backwards to the center, an inner warning area 12 which extends from the outer warning area to the front to a warning beam area 13 which is arranged at right angles to the direction of travel 10 , and by means of a swipe Field the approach and / or the presence of a living being, such as a person or an animal or an object moved by a person, it detects and emits a signal to the converter device 18 via an electrical connection 17 in the manner already described.

The converter device 18 is supplied with power from an electrical supply line 22 from the towing vehicle 1 .

The acoustic and optical warning devices 14 , 15 are attached to both the agricultural harvester 2 and the towing vehicle 1 , the lines between the towing vehicle 1 and the harvester 2 being releasably connectable with plug couplings.

When approaching an object, a person or an animal from the side, one of the mechanical sensors 8 or 8 'is first actuated and one of the switches 16 is switched and a warning signal is triggered which is only switched off when the sensor returns to the starting position.

When approaching from behind, the outer warning area 11 of one of the partial sensors of the field sensors 9 or 9 'is first reached and a basic warning signal is triggered. When approaching further, a penetration into the inner warning area 12 triggers a warning signal which is increased in intensity and / or in frequency or warning sequence. The warning signal with the greatest warning effect is triggered when the warning beam 13 penetrates.

As soon as the outer warning area 11 is reached, the electrical signal sent to the converter device 18 can be used to transmit an electrical switching signal to a clutch in the drive train of the machine and to promptly stop the drive.

Reference list

1

Towing vehicle

2nd

agricultural harvester

3rd

,

3rd

'' moving work tool

4th

Machine frame

5

Traction device

6

Sensor carrier

7

Width of the warning area

11

,

12th

,

13

or the agricultural machine

2nd

8th

,

8th

'' mechanical sensor

9

,

9

'' Field sensor

10th

Direction of travel

11

outer warning area

12th

inner warning area

13

Warning beam area

14

acoustic warning device

15

optical warning device

16

mechanical sensor electrical switch

8th

,

8th

'

17th

electrical connection of the sensor

8th

,

8th

',

9

,

9

'

18th

Converter device

19th

electrical signal line to the warning device

14

,

15

20th

inner protection bar

21

outer protection bar

22

electric power line

Claims (12)

1. Agricultural harvester with a device for detecting a moving object, in particular a living being, such as a person, during approach to or in the presence of, in an area nearby, which moved with a drive device via a drive train, not with a Mechanical protective device, such as protective brackets or similar parts of the working tools of the agricultural harvesting machine which can be covered, with which device at least one downstream activatable device can be actuated, characterized in that in the area next to the moving working tools ( 3 , 3 ') of the agricultural harvesting machine ( 2 ) at least one sensor ( 8 , 8 ', 9 , 9 ') at least one, over the width ( 7 ) of the agricultural harvesting machine and / or at least its moving working tools ( 3 , 3 ') reaching warning area ( 11 , 12 , 13 ) detecting is arranged, which with an electrical connection ( 17 ) r transmission of electrical signals to at least one downstream converter device ( 18 ) which is connected via at least one electrical signal line ( 19 ) with at least one warning device ( 14 , 15 ) for the delivery of activating electrical signals and in particular with an electrical supply line ( 22 ) for the electrical power supply, is connected. 2. Agricultural harvesting machine according to claim 1, characterized in that the at least one sensor ( 8 , 8 ', 9 , 9 ') are designed as motion detectors. 3. Agricultural harvesting machine according to claim 1 or 2, characterized in that the at least one Warnvor direction ( 14 , 15 ) is designed as an acoustic warning device ( 14 ) and / or as an optical warning device ( 15 ), the electrical power supply either via the converter device ( 18 ) or receives a separate supply line. 4. Agricultural harvester according to one of Ansprü che 1 to 3, characterized in that at least on both sides of the agricultural harvester ( 2 ) at least one sensor ( 8 , 8 ', 9 , 9 ') is attached, which is essentially half the width ( 7 ) of a warning area ( 11 , 12 , 13 ) sweeps and is arranged behind a rear tractor in a trailed agricultural harvester ( 2 ) with respect to the direction of travel ( 10 ) thereof. 5. Agricultural harvesting machine according to one of claims 1 to 4, characterized in that on at least one and preferably on both sides of the agricultural harvesting machine ( 2 ), a mechanical sensor ( 8 , 8 ') is attached, which by pivoting around a vertical axis or an electrical switch ( 16 ) is actuated by elastic deformation. 6. Agricultural harvesting machine according to one of claims 1 to 5, characterized in that on at least one and preferably on both sides of the agricultural harvesting machine ( 2 ) in place or in addition to the mechanical sensor ( 8 , 8 ') at least one field sensor ( 9 , 9 ') is attached, the inductive, electromagnetic table, in particular optically with infrared or acoustically with ultrasound or the like, the width ( 7 ) of at least one and preferably several warning areas ( 11 , 12 ) and / or a warning beam ( 13 ) sweeps over. 7. Agricultural harvesting machine according to one of claims 1 to 6, characterized in that each field sensor ( 9 , 9 ') comprises a partial sensor which has a warning beam ( 13 ) which is essentially at right angles to the direction of travel ( 10 ) of the agricultural Harvesting machine ( 2 ) is aligned, sweeps over at least half the width ( 7 ) of the same and / or the warning beam ( 13 ) if a field sensor ( 9 , 9 ') is arranged on each side thereof. 8. Agricultural harvester according to one of claims 1 to 7, characterized in that each field sensor ( 9 , 9 ') comprises at least two partial sensors, one of which is the outer warning area ( 11 ) and the other the inner warning area ( 12 ) at least Cover over their half width ( 7 ) and / or the agricultural harvester ( 2 ) if a field sensor ( 9 , 9 ') is arranged on both sides of the same. 9. Agricultural harvesting machine according to one of claims 1 to 8, characterized in that in the case of a drawn agricultural harvesting machine ( 2 ), the outer warning area ( 11 ) from each field sensor ( 9 , 9 ') to the rear, opposite to the direction of travel ( 10 ), preferably straight, and limited to the front to obliquely to the rear, extends at least over half the width ( 7 ) of the warning area ( 11 ) and / or the agricultural harvesting machine ( 2 ) if a field sensor ( 9 , 9 ') is arranged. 10. Agricultural harvesting machine according to one of claims 1 to 8, characterized in that in the case of a drawn agricultural harvesting machine ( 2 ), the inner warning area ( 12 ) from each field sensor ( 9 , 9 ') towards the front, in the direction of travel ( 10 ), adjoins the outer warning area ( 11 ) and ends at the front, essentially at right angles to the direction of travel ( 10 ) and extends at least over half the width ( 7 ) of the warning area ( 11 ) and / or the agricultural harvester ( 2 ) , if a field sensor ( 9 , 9 ') is arranged on both sides of the same. 11. Agricultural harvesting machine according to claim 1, characterized in that the converter device ( 18 ) to the electrical switch ( 16 ) of each mechanical sensor ( 8 , 8 ') and to each field sensor ( 9 , 9 ') connected via an electrical connection to be activated is and with the warning devices ( 14 , 15 ) on the agricultural harvester ( 2 ) and / or on the towing vehicle ( 1 ) via electrical signal lines ( 19 ) and via an electrical power supply line ( 22 ) to a power source, preferably the towing vehicle ( 1 ), which, like the electrical signal line ( 19 ), for which at least one warning device ( 14 , 15 ) of the towing vehicle ( 1 ) can be connected to the latter with plug couplings. 12. Agricultural harvesting machine according to one of the preceding claims 1 to 11, characterized in that the agricultural harvesting machine ( 2 ), in particular a haymaking machine and preferably a machine for tedding and turning straw is the at least one warning area ( 11 , 12 , 13th ) has, the, no protective bar ( 20 , 21 ) having part of the moving Ar beitswerkzeuge ( 3 , 3 '), the upstream of the drive device of the towing vehicle ( 1 ) via a drive train ben raked wheels and with a drawn machine behind it is arranged, extends at least over its width ( 7 ).