JPH0445468Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention is a tensioning device for a tying cord in a tying machine to avoid false alarms during non-tying work, and is used in combine harvesters.

[Prior art]

Conventional devices of this kind, for example, Utility Model Application No. 59-87235
The configuration shown in the publication is such that the deflection control rod that applies tension to the tying cord is configured to automatically activate the safety device only when the tension is not applied, and the deflection control rod is placed in the tensioning position. It was constructed with a locking tool for holding it.

[The problem that the idea aims to solve]

According to the configuration of the prior art described above, for example, when a cutter operation is temporarily performed during a binding operation, the deflection lever is locked by the locking tool that holds it in the working position.

When the cutter operation is performed while the machine body is moving forward, the deflection lever may be disengaged from the locking tool due to vibrations caused by the operation, and may be placed in a non-operating position due to the action of the spring.

As a result, even though the deflection lever must be kept in its working position, the safety device was automatically activated, stopping the prime mover or sounding a buzzer.

In contrast, this invention allows the tension arm to be switched between the inner and outer positions with the tension arm guiding member as the boundary by using technical means as described below. When it is in the outer rest position, it does not move inward due to vibrations of the aircraft body, which solves the defects of the prior art.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention
The following technical measures will be taken. That is, the tension arm guide member 16 is placed at the boundary position with the string passage side between the binding string storage device 10 and the needle 6 as the inside, and the direction away from the string path as the outside.
A sensing body 17 for operating a switch 15 of a safety device is provided inside the tension arm guiding member 16, and a tension arm 18 for applying a tensioning action to the binding string in the string passage is connected to the tension arm. The tension arm 1 is provided on the inside and outside of the guiding member 16 so as to be switchable in position.
Reference numeral 8 is configured such that the switch 15 of the safety device can be operated via the sensing body 17 only when no tension is applied to the binding cord at the inside position, and the tension arm 18 is operated as described above when not performing binding work. This is a tying string tension device for a tying machine configured to be able to be held in a resting position outside the tension arm guide 16.

〔Example〕

The binding machine 1 includes a building 3 and a string holder 4 on the upper side with a binding passage 2 in between, and a packer 5 and a needle 6 on the lower side.

7 is a straw feeding device, 8 is a discharge device, and 9 is a grain culm receiving rod.

The binding string storage device 10 is configured such that a string bundle storage frame 11 is provided on the upper part of a machine frame 12, and the strings are sent out to the binding machine 1.

The mounting plate 13 is attached to the side plate 14 on the string feeding side of the string bundle storage frame 11, has a micro switch 15 attached to its base, and has a tension arm guide member 16 protruding outward in an angular shape on one side. are doing.

The sensing body 17 has its base attached to the microswitch 15 and its tip located inside the tension arm guide member 16.

The tension arm 18 is attached to the side plate 14,
The tension arm guide member 16 is configured to be able to switch its position between the inside and the outside.

Further, the tension arm guide member 16 is a fourth
As shown in FIGS. 5 and 6, the base of the guiding surface 16a for guiding the tension arm 18 is provided close to the micro switch 15.

That is, the conventional type of this type of device was constructed as shown in the virtual line shown in FIG.
7 was bent and deformed and damaged when pressed by the tension arm 18.

Reference numeral 19 indicates a string guide ring, and 20 indicates a string guide pipe leading to the needle 6.

21 indicates a cutter, and 22 indicates a straw removal chain.

When the sensing body 17 is pressed, it turns on the micro switch 15 and issues an alarm.

It should be noted that the safety device is not limited to the above-mentioned warning, but may also include stopping the engine, cutting off the power transmission of the binding clutch device, etc.

Next, its effect will be explained.

First, when performing tying work, the string bundle is stored in the tying string storage device 10, the string end is pulled out and the string guide ring 19 is inserted, and then the string guide ring 19 is inserted through the tension arm 18. 20 to the needle 6.

Then, the binding string is stretched from the needle 6 to the binding passage 2 and held by the string holder 4.

In this way, if the tying string is stretched in advance and the tying work is started, the straw supplied from the straw removal chain 22 will be forced into the tying passage 2 by the straw feeding device 7.
The grain is fed into the grain culm receiving rod 9 and compressed and concentrated by the compressor 5 which is in operation.

When the compressed grain culm reaches a certain amount, the needle 6 winds the binding string, and the building 3 and the string holder 4 act to bind the grain culm.

During such a tying action, the tension arm 18 applies a tensioning action to the tying string due to its spring action, thereby preventing the tying string from becoming loose.

Next, when the binding string is cut, the tension arm 18 is guided by the tension arm guide member 16 by the spring action, presses the sensing body 17, and turns on the micro switch 15.

Then, the alarm device issues an alarm to notify the user of the broken string.

Next, when performing cutter work, the tension arm 18 is switched from the working position (a) in FIGS. 1 and 2 to the resting position (b), that is, to the outside of the tension arm guiding member 16.

When the cutter work is performed, the tension arm 18 is held in the rest position B, and the machine frame 12 is
It is maintained in the resting position regardless of vibration.

In this case, the tension arm 18 is located at the outer side of the tension arm guide member 16, and
The vibration of the machine frame 12 will not cause the tip of the machine frame 12 to bypass and return to the working position A.

However, when the needle 6 operates and tension is applied to the binding string, the tension arm 18 bypasses the tip of the tension arm guide member 16 and assumes the operating position A.

[Effect] This invention has a structure that allows the tension arm to be switched between the normal working position and the rest position, so when switching to cutter work during binding work, the tension arm can be switched to the rest position. If this is done, the machine will not return to its working position even if the machine vibrates.

Therefore, the safety device is designed to prevent false alarms and allow work to continue with peace of mind.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention,
Figure 1 is an action plan view, Figure 2 is an action slope view, and Figure 3 is an action plan view.
The figure is a side view, FIG. 4 is a plan view showing the operation, FIG. 5 is a side view, and FIG. 6 is a slope view. Explanation of symbols, 1... Binding machine, 2... Binding path,
3... Building, 4... String holder, 5... Packer, 6... Needle, 7... Straw feeding device, 8...
Release device, 9... Grain culm receiver, 10... Binding string storage device, 11... String bundle storage frame, 12... Machine frame, 13
... Mounting plate, 14 ... String feeding side plate, 15 ... Micro switch, 16 ... Tension arm derivative, 17 ... Sensor, 18 ... Tension arm, 19 ... String guide ring, 20 ... string guide pipe,
21... cutter, 22... straw chain.

Claims (1)

[Scope of utility model registration request] A tension arm guiding member 16 is provided to protrude at a boundary position with the string passage side between the binding cord storage device 10 and the needle 6 as the inside and the direction away from the string passage as the outside. A tension arm 1 is provided with a sensing body 17 for operating a switch 15 of a safety device inside the tension arm 16 and applies a tensioning action to the binding string in the string passage.
8 is provided so as to be operable to switch its position between the inside and outside of the tension arm guide member 16, and the tension arm 18 is provided with the switch 15 of the safety device only when it is not applying tension to the binding cord in the inside position. is configured to be operable via the sensing body 17, and when the tension arm 18 is not performing binding work, the tension arm guide 16
A tying string tension device for a tying machine configured to be able to be held in a resting position outside of the tying machine.