JPH0434676Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a safety device for a threshing machine, specifically, a handling cylinder, a handling chamber cover that can be opened and closed to cover the handling cylinder, and a system that cuts off power transmission to the handling cylinder. This invention relates to a safety device for a threshing machine equipped with a threshing clutch.

(Prior Art) Conventionally, this type of threshing machine is configured to transmit power from the prime mover side to the handling drum, and the power transmission system is provided with a threshing clutch that cuts off power transmission to the handling drum. The rotation of the handling cylinder is stopped by turning off the clutch.

However, as described above, in the case where the rotation of the handling drum is stopped by turning off the threshing clutch, even if the threshing clutch is turned off, the handling cylinder does not stop immediately due to its rotational inertia, and remains for a while. Therefore, for example, if you open the handling cylinder cover immediately after turning off the threshing clutch from the on state for maintenance inspection, the handling cylinder will rotate due to rotational inertia and become very dangerous. There was a problem that was dangerous and could lead to an accident.

Therefore, in order to solve the problem more than the conventional one, for example, as shown in Japanese Patent Publication No. 57-6883, a brake is provided on the handling cylinder to brake the rotation of the handling cylinder, and the threshing clutch is turned off. It has been proposed that the brake is activated in conjunction with the movement to stop inertial rotation.

(Problems to be Solved by the Invention) As described above, in a threshing machine in which the brake is operated in conjunction with the off operation of the threshing clutch, the handling chamber cover is opened to perform maintenance or inspection of the handling barrel. When performing maintenance, there is no problem if the threshing clutch is turned off, but there are cases where the handling chamber cover is opened to look into the handling chamber or to insert a hand into the handling chamber without turning off the threshing clutch. In other cases, the rotation of the handling drum could lead to unexpected accidents, such as when the threshing clutch was accidentally turned on when the handling room cover was opened for inspection or maintenance.

The purpose of the present invention is not only to turn off the threshing clutch, but also to operate the brake device by opening the handling chamber cover to immediately stop the rotation of the handling drum. Regardless of whether the chamber cover is opened or not, and when the handling chamber cover is opened, maintenance and inspection can be carried out safely regardless of whether the threshing clutch is turned off. can be stopped in an emergency, preventing the spread of problems in the handling room,
At the same time, it is an attempt to provide a safety device for a thresher that is simple in structure, has a small number of parts, and is inexpensive.

(Means for Solving the Problems) The present invention includes a handling cylinder 3, a handling chamber cover 11 that can be opened and closed to cover the handling cylinder 3, and a threshing clutch 6 that cuts off power transmission to the handling cylinder 3. As a safety device for the thresher, a brake device 7 is provided to brake the rotation of the handling barrel 3, and the brake device 7 is provided in conjunction with the off operation of the threshing clutch 6 and the opening operation of the handling chamber cover 11. One operating mechanism for operating the device 7 is provided.

(Function) With the above configuration, the rotation of the handling barrel 3 can be immediately stopped by the action of one brake device 7 in either case of the off operation of the threshing clutch 6 or the opening operation of the handling chamber cover 11. Immediately after turning off the threshing clutch 6, the handling chamber cover 11
Even when performing maintenance and inspection around the handling cylinder 3 without opening the handling cylinder 3, it can be done with the handling cylinder 3 stopped, ensuring safety, and the opening operation of the handling chamber cover 11 also allows the handling cylinder 3 to be inspected. Since the rotation of the threshing clutch 6 can be immediately stopped, it is of course possible to open the handling chamber cover 11 with the threshing clutch 6 turned off for maintenance and inspection, and also to avoid unnecessary operations when the threshing clutch 6 is turned off. When opening the chamber cover 11 or opening the handling chamber cover 11 for maintenance inspection,
Even if the threshing clutch 6 is accidentally turned on while the handling chamber cover 11 is open, the handling cylinder 3 can be stopped or the area can prevent the handling cylinder 3 from starting to rotate. Maintenance and inspection work can be carried out safely, and accidents caused by the rotation of the handling cylinder 3 can be reliably prevented.

Furthermore, since the handling cylinder 3 can be stopped by operating the brake device 7 when the threshing clutch 6 is turned off, it is possible to stop the handling cylinder 3 in an emergency, thereby preventing the problem from escalating in the handling room. It can also be prevented.

(Example) An example of the safety device according to the present invention will be described below based on the drawings.

Fig. 9 shows a threshing machine mounted on the platform of a general-purpose combine harvester. A screw type handling cylinder 3 is supported freely in rotation, and a receiving net 4 is installed at the lower part of the handling chamber 2.
A sorting device 5 is provided at the bottom of the receiving net 4.

Reference numeral 11 denotes a handling chamber cover constituting a part of the main body casing 1. The lower end of one side of the cover 11 is supported on the upper part of the handling chamber 2 via a rotating shaft 12 so as to be openable and closable. By swinging the cover 11 upward about the rotation shaft 12, the upper part of the handling chamber 2 is opened.

The handling cylinder 3 is connected to the front and rear walls 1a, 1b of the main body casing 1 located on both sides of the handling chamber 2 in the length direction via a handling cylinder shaft 31 extending from the center to both sides in the length direction.
The handling barrel shaft 31 is rotatably supported by a threshing clutch lever 61, and the handling barrel shaft 31 is interlocked and connected to a prime mover (not shown) via a power transmission mechanism. A threshing clutch 6 is interposed therebetween to interrupt power transmission to the handling cylinder 3.

Therefore, in the above-mentioned threshing machine, one brake device 7 is provided to control the rotation of the handling barrel 3, and the brake device 7 is connected to the off operation of the threshing clutch 6 and the opening operation of the handling chamber cover 11. One operating mechanism for operating the brake device 7 is provided.

Specifically, as shown in FIG. 1, for example, a brake device 7 made of an electromagnetic brake is installed between the handling cylinder pulley 32 provided at the rear end of the handling cylinder shaft 31 and the outer surface of the rear wall 1b of the main body casing 1. , an electric circuit C is formed by providing a first switch (SW-1) on the rocking locus of the clutch lever 61 so that the electromagnetic brake 7 is turned on when the threshing clutch lever 61 is turned off; Circuit C
In addition, a second switch (SW-2) that closes the electric circuit C in conjunction with the opening operation of the handling room cover 11 is provided in parallel with the first switch (SW-1).

In this way, when the threshing clutch lever 61 is turned off and the handling chamber cover 11 is opened, the electromagnetic brake 7 is activated and the handling cylinder 3 is forcibly braked.

Therefore, even if, for example, the threshing clutch 6 is turned off by the threshing clutch lever 61 during maintenance inspection, and the area around the handling drum 3 is to be inspected without immediately opening the handling chamber cover 11, the handling drum 3 can be stopped. In addition, even when the handling chamber cover 11 is opened, the electric circuit C is closed and the electromagnetic brake 7 is activated to immediately stop the rotation of the handling barrel 3. Therefore, it goes without saying that when opening the handling chamber cover 11 and performing maintenance inspection with the threshing clutch 6 turned off, it is also necessary to open the handling chamber cover 11 without turning off the threshing clutch 6. When opening the chamber cover 11 for maintenance inspection, or when opening the chamber cover 1
Even if the threshing clutch 6 is turned on by mistake when the threshing clutch 6 is opened, the handling cylinder 3 can be stopped and the rotation of the handling cylinder 3 can be prevented. This can be done safely, and accidents caused by the rotation of the handling cylinder 3 can be reliably prevented. Moreover, since the handling drum 3 can be stopped by actuating the brake device 7 when the threshing clutch 6 is turned off, it is possible to stop the handling drum 3 in an emergency, thereby preventing troubles in the handling room from expanding. It can also be prevented.

Moreover, the one shown in FIG. 2 uses a hydraulic brake as the brake device 7, and the handling trunk shaft 12
The brake disc 71 is located near the handlebar pulley 32.
The hydraulic brake main body 70 has a pair of brake pads 70a, 70a on the rear wall of the main body casing 1.
The brake body 70 is arranged to sandwich the brake disc 71, and the brake body 70 is connected to a hydraulic circuit (not shown) via an electromagnetic valve (not shown). First and second switches for controlling the electromagnetic valve are provided on the swing locus of the chamber cover 11 at the same positions as in the case of the electromagnetic brake described above, and the electromagnetic valve is controlled by the output signals from the first and second switches. Switch the valve to activate the hydraulic brake,
It is designed to forcibly apply the brakes.

Even with such a hydraulic brake, the same effects as in the case of the electromagnetic brake can be obtained.

Moreover, what is shown in FIG. 3 shows the operating mechanism of the mechanically operated brake device 7, in which brake operating side wires 81 and 82 are provided on the threshing clutch lever 61 and the handling room cover 11, respectively. Wires 81 and 82 are respectively connected to both sides of a movable body 84 provided at the tip of a brake operating wire 83 that operates the brake device 7, and the threshing clutch lever 61 is turned off or the handling room cover 11 is opened. The movable body 84 is moved upward as shown by the imaginary line in FIG. 3, and the braking device 7 is actuated by pulling the brake actuating wire 83.

Examples of the brake device 7 used in such an operating mechanism include those shown in FIGS. 4 to 8. First, the brake device 7 shown in FIG. 4 has a support member 20 fixed to the side wall 1b of the main body casing 1 that protrudes outward, and a pair of brake arms sandwiching a handling barrel pulley 32 on one side of the support member 20. 21
a, 21a, and a pair of pressing pieces 21b, 21b at a predetermined interval on the other side, the brake body 21, which is entirely made of a flexible material, is fixed via a mounting shaft 22, and the support A cam 23 for pushing and expanding the pressing pieces 21b, 21b is rotatably supported on the member 20, and the cam 23 is connected to the brake actuating side wire 83 of the actuating mechanism via a connecting rod 24 and a spring 25. It is.

When the brake actuating wire 83 is pulled due to the off operation of the threshing clutch lever 61 or the opening operation of the handling chamber cover 11, the cam 23 rotates clockwise, pushing the pressing pieces 21b and 21b outward and expanding them. , the brake arms 21a, 21a
These brake arms 21a,
The brakes are applied by pressing each pad 21a against the handling barrel pulley 32.

According to such a brake device 7, the brake is forcibly applied when the threshing clutch lever 61 is turned off and the handling chamber cover 11 is opened, thereby shortening the braking time and improving safety. Since the pulley 32 can also be used as a brake disc, it can be made compact and inexpensive, and the belt 32a stretched around the handling barrel pulley 32 can be prevented from coming off.

Moreover, the cam 23 and the brake actuation side wire 83
The spring 25 interposed between the two absorbs the sudden force and provides a smooth braking effect.

Moreover, what is shown in FIGS. 5 and 6 is an internal expansion type brake device 7, which has cooling fins 41a on the outer periphery of a side surface of a handling barrel pulley 32 on a handling barrel shaft 31. While fixing the drum 41, on the side wall 1b of the main casing 1,
Brake arm 4 with brake pad 42a
2, 42 and a cam 4 that presses the brake pads 42a, 42a against the inner peripheral surface of the brake drum 41.
3, and the cam 43 is connected to the brake actuating side wire 83 of the actuating mechanism via a connecting rod 45 and a spring 4.

In such a brake device 7, the threshing clutch lever 61 is turned off and the handling chamber cover 11 is turned off.
The brake can be forcibly applied during the opening operation to shorten the braking time and improve safety. In addition, since the brake drum 41 with the cooling fins 41a is integrally provided with the handling drum pulley 32, the cooling fins 41a can brake the drum. It is possible to reduce the temperature rise of not only the drum 41 but also the handling cylinder pulley 32 and belt 32a, and when the offset amount of the handling cylinder pulley 32 is large, the boss portion 44 of the brake body 44
By inserting a bearing in a, the amount of eccentricity of the handling cylinder shaft 31 can be reduced, and in addition, since the braking surface is located inside the brake drum 41,
Brake loss due to oil or other condensation can also be reduced.

Further, a brake device 7 shown in FIGS. 7 and 8
In this example, an interlocking pulley 51 for braking is arranged in parallel with the handling cylinder pulley 32 on the handling cylinder shaft 31, and a brake pulley 52 is provided corresponding to the pulley 51, and a brake belt 53 is connected to both of these pulleys 51 and 52. A tension roller 54 is provided at an intermediate portion of the belt 53 to tension the belt 53, and the roller 54 is connected to the brake actuating side wire 83 of the actuating mechanism via a spring 55.
The brake pulley 5 is connected to the brake pulley 5.
2 is a mounting shaft 5 attached to the support member 56 on the main body casing 1 side.
7, and a movable pulley 52b which is normally biased toward the fixed pulley 52a by a coil spring 58. Both pulleys 52a and 52b have inclined surfaces 52c and 52b on their opposing surfaces. 52d.

When the brake actuating wire 83 is pulled due to the off operation of the threshing clutch lever 61 and the opening operation of the handling chamber cover 11, the tension roller 54 presses the brake belt 53, and the belt 53 is applied to the handling cylinder 3. While applying the brakes,
At this time, the movable pulley 52b is
As a result, the movable pulley 52b moves in a direction away from the fixed pulley 52a as shown by the imaginary line in FIG.
a and the respective inclined surfaces 52c, 5 of the moving pulley 52b.
The band belt 53 falls into the groove formed between 2d and the coil spring 58 within this groove.
This results in a more powerful brake being applied as a result of the pinching action.

Therefore, according to this brake device 7, when the threshing clutch lever 61 is turned off and the handling room cover 11 is opened, the brake is forcibly applied to shorten the braking time and improve safety. The braking can be performed smoothly in two stages.

(Effects of the Invention) As described above, the present invention provides one brake device 7 for braking the rotation of the handling barrel 3, as well as the off-operation of the threshing clutch 6 and the handling chamber cover 1.
1 is provided with one operating mechanism that operates the brake device 7 in conjunction with the opening operation of the brake device 7.
Off operation of the threshing clutch 6 and handling chamber cover 1
In any of the opening operations mentioned above, the rotation of the handling barrel 3 can be stopped immediately by the operation of one brake device 7, so that the handling chamber cover 11 can be immediately stopped after the threshing clutch 6 is turned off. Even when performing maintenance and inspection around the handling cylinder 3 without opening it, it can be done with the handling cylinder 3 stopped, ensuring safety, and the opening operation of the handling chamber cover 11 also allows the handling cylinder 3 to be inspected. Since the rotation of the threshing clutch 6 can be immediately stopped, it is of course possible to open the handling chamber cover 11 for maintenance inspection with the threshing clutch 6 turned off, or to open the handling chamber cover without turning off the threshing clutch 6. 11 or open the handling room cover 1.
Even if the threshing clutch 6 is turned on by mistake while the handling chamber cover 11 is opened for maintenance inspection or when the handling chamber cover 11 is opened, the handling drum 3 may be stopped or the handling drum Since the rotation of the handling cylinder 3 can be prevented from starting, the maintenance and inspection work can be carried out safely, and accidents caused by the rotation of the handling cylinder 3 can be reliably prevented.

Furthermore, since the handling cylinder 3 can be stopped by operating the brake device 7 when the threshing clutch 6 is turned off, it is possible to stop the handling cylinder 3 in an emergency, thereby preventing the problem from escalating in the handling room. In addition, the threshing clutch 6
The handling cylinder 3 is stopped by the turning off operation and the opening operation of the handling chamber cover 11 by using one brake device 7, and one actuation mechanism is used to operate the brake device 7. from,
The structure is simple, the number of parts is small, and it can be provided at low cost.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of the safety device according to the present invention, Fig. 2 is an explanatory diagram showing another embodiment using a hydraulic brake device, and Fig. 3 is an explanatory diagram showing another embodiment of the operating mechanism. 4 is a side view showing an embodiment of a brake device using a handling drum pulley as a brake drum, and FIG. 5 is a partially cutaway side view showing another embodiment using a drum brake device. Fig. 6 is a longitudinal cross-sectional view of the same, Fig. 7 is an explanatory view showing another embodiment using a band brake device, Fig. 8 is an explanatory view of the same main part, and Fig. 9 is a longitudinal cross-section of the entire threshing machine of the present invention. It is a diagram. 3... Handling cylinder, 6... Threshing clutch, 7... Brake device, 11... Handling room cover.

Claims (1)

[Scope of utility model registration request] In a safety device for a threshing machine comprising a handling drum 3, a handling chamber cover 11 that can be opened and closed to cover the handling drum 3, and a threshing clutch 6 for cutting off power transmission to the handling drum 3, rotation of the handling drum 3 is provided. The present invention is characterized in that one brake device 7 is provided for braking the threshing clutch 6, and one operating mechanism is provided for operating the brake device 7 in conjunction with the off operation of the threshing clutch 6 and the opening operation of the handling room cover 11. Threshing machine safety device.