JPH026759Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a twine bundling completion warning device for a roll baler, which notifies the operator that the process of wrapping and bundling the twine around the roll formed within the bale chamber of the roll baler has been completed. Regarding the improvement of

Baling work is carried out using a roll baler, as shown in Fig. 1. Grass and rice straw are picked up from the surface of the field by a pick-up device 2 installed at the front end of the machine body 1, and then a bale chamber 3 is mounted on the machine body 1. The winding conveyor 30 installed in the bale chamber 3 winds the bale into a bundle-like roll, and when the roll reaches a predetermined diameter, the machine stops running and removes the pasture. In this state, the winding conveyor 30 in the bale chamber 3 is driven to rotate the formed roll while supplying twine (tying string), and wrapping the twine around the outer peripheral surface of the roll. After forming the bale into a bale and completing this process, the ejection gate 3a of the bale chamber 3 is opened.
The bale is opened and the formed bale is taken out of the machine, and then the machine body 1 is run again and the above-mentioned steps are repeated.

The process of wrapping the twine around the circumference of the roll of grass that has been formed in the bale chamber 3 to form a bale is carried out by the operator using the traveling device of the machine body 1 when the roll is compression-molded to a predetermined thickness. The machine 1 is stopped by cutting off the drive, and the operator operates the starter 6 by pulling the starter rope 60 (Fig. 2) or driving the motor, and drives the feed rolls 61 and 62 of the starter 6. The twine 7 is fed out until the tip side 70 of the twine 7 is entangled with the circumferential surface of the roll rotating inside the bale chamber 3 by the drive of the winding conveyor 30. The twisted twine 7 is wound and unwound one after another from the bundle 7a, and the unwound twine 7 is attached to a chain 8 which is stretched endlessly between a sprocket 80 and a sprocket 81, as shown in FIGS. 2 and 3.
2, the twine guide fitting 83 is guided by a twine guide fitting 83 supported by an elongated hole 83a in the vertical direction and a connecting pin 83b fitted therein.
However, as the sprocket 81 is driven by the rotation of the guide pulley 84 that guides the twine 7 being fed out, the roll a is reciprocated from side to side along the axial direction of the roll a between the sprockets 80 and 81. The twine 7 is wound sequentially from the end over the entire width in the axial direction of the outer circumferential surface of a, and while the twine guide fitting 83 makes one reciprocation, the twine guide fitting 83 is formed into a single-edged blade and the blade part 86a is rotated by the support shaft 85. By passing the side of the knife 86 rotatably supported on the side from the side of the blade part 86a, the twine 7 to be guided is cut by the blade part 86a of this knife 86. I am trying to complete the bundling of roll a.

By the way, the process of winding the twine around the circumferential surface of the roll a takes a considerable amount of time, and it is difficult for the operator to know from the outside that the process has ended. For this reason, in the past, a limit switch was provided on the locus of movement of the twine guide fitting 83 when it reciprocated, and the limit switch was turned on by coming into contact with the twine guide fitting 83, and when the switch was turned on, the alarm was activated. In this way, a method has been attempted to notify that the bundling of the rolls by the twine has been completed, but this method does not require that the movement of the twine guide fitting 83 be stopped by cutting the twine 7 with the knife 86. Therefore, in many cases, the alarm continues to be emitted, and there is a problem in that it is difficult to position the limit switch to be installed.

The present invention solves this problem and ensures that the alarm is activated when the twine 7 completes the binding process, and that the activation of the alarm is
It is an object of the present invention to propose a new means that automatically stops when the twine 7 is finished cutting at step 6 and returns to a state in which a predetermined alarm is activated again in the next bale stroke.

In order to solve the above-mentioned problems, the present invention was developed after various researches.The knife 86 that cuts the twine 7 is guided by the twine guide fitting 83 from the back side of the blade part 86a and moves in the left and right direction. When the incoming twine 7 comes into contact, the twine 7 is rotated counterclockwise in FIG. Since the knife 86 is held in the state shown in FIG. 3 to receive and cut the abutting twine 7, the knife 86 cannot be rotated clockwise from the state shown in FIG. The stopper installed to prevent this is configured as a switch that is turned on when a certain pressure is applied and turned off when the pressure is released, and the switch is used to control the opening and closing of the alarm circuit by turning on and off the switch. If it is connected to the circuit of the alarm so that the knife 86 cuts the twine, the load applied to the knife 86 will turn on the switch and activate the alarm, causing the knife 86 to This was done based on the result that when the twine 7 is cut off, the load is released and the alarm stops operating.

Therefore, in this invention, the second
As shown in FIGS. 3 and 3, the twine guide fitting 83 is rotatably supported in the axial direction by a support shaft 85 near the locus of movement of the twine guide fitting 83, which reciprocates along the axial direction of the roll a formed in the bale chamber 3. Knife 86
As shown in FIG. 4, the blade part 86a of the knife 86
From the opposite side, the twine 7 is supported in a cutting position by a switch SW which is turned on by pressing and turned off by releasing the pressure, and the switch SW is connected to a buzzer/horn installed at an appropriate position on the fuselage 1. In circuit b of alarm B, etc., the fifth
As shown in the figure, a means is proposed for connecting the circuit b of the alarm B so as to control opening and closing by turning on and off the switch SW.

In this method, as shown in FIG. 6, the knife 86 is provided with a stopper 9, which elastically supports the knife 86 by a spring 90, on the opposite side of the knife 86 from the blade part 86a, separately from the switch SW. The twine 7 is normally supported by this, and the knife 86 comes into contact with the blade portion 86a.
Due to the rotation due to the load, the spring 90 of the stopper 9
When the switch is retracted, the operating piece of the switch SW may be pushed in to turn on the switch SW.

The means of the present invention thus constructed operates as follows.

The machine body 1 of the roll baler A is stopped running, the starter 6 is activated, and the tip side 70 of the twine 7 is paid out by a predetermined length, and the rotating roll a formed to a predetermined thickness in the bale chamber 3 is rolled. When the twine 7 performs the binding process by being entangled in
Since no load is applied to the knife 86 while moving away from the knife 86 and during the process of moving from the side opposite to the blade portion 86a of the knife 86, the switch SW supporting the knife 86 is in the off state, so alarm B is not activated.

As the binding process of the twine 7 progresses and the twine 7 guided by the twine guide fitting 83 comes into contact with the blade portion 86a of the knife 86, the knife 86 is pressed by the twine 7, and this load causes the switch to close.
SW is turned on and alarm B is activated to notify that twine binding has been completed.

When the knife 86 finishes cutting the twine 7, the load is released and the switch SW returns to OFF.
Stop the operation of alarm B.

Therefore, according to the means of the present invention, an alarm is reliably issued when twine binding is completed, and the alarm is automatically stopped when the twine is cut with a knife.

[Brief explanation of the drawing]

Figure 1 is a partially broken side view of the roll baler.
Fig. 2 is a plan view of the twine guide mechanism section of the same as above, Fig. 3 is a front view of the same as above, Fig. 4 is a front view of the main parts of the device of the present invention, Fig. 5 is an electric circuit diagram of the same as above, Fig. 6 FIG. 3 is a front view of main parts of another embodiment. Explanation of drawing symbols, A...Roll baler, a...
Roll, B...alarm, b...circuit, 1...body, 2...pickup device, 3...veil chamber, 3a...discharge gate, 30...engulfing conveyor, 5...travelling device, 6...Starter, 60...
...starter rope, 61,62...feeding roll,
7... Twine, 7a... Winding bundle, 70... Tip side, 80, 81... Sprocket, 82... Chain, 83... Twine guide fitting, 83a... Elongated hole, 83b... Connecting pin, 84... ...Guide pulley, 85...Spindle, 86...Knife, 86a...
Blade, 9...stopper, 90...spring, SW...
...Switch.

Claims (1)

[Scope of utility model registration request] A knife 86 for cutting the twine 7 is provided near the locus of movement of the twine guide fitting 83 that reciprocates along the axial direction of the roll a formed in the bale chamber 4, and is rotatable in the axial direction by a support shaft 85. From the opposite side of the blade portion 26a of the knife 86, the twine 7 is supported in a cutting position by a switch SW that is turned on by pressure and turned off by release of the pressure.
A twine bundling completion alarm device in a roll baler is connected to circuit b of the alarm device B so as to control opening and closing of circuit b of the alarm device B by turning on and off the switch SW.