JPH11275935A - Grain threshing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain threshing machine capable of simply opening and closing threshing cylinder and securely locking in closing time SOLUTION: This thresher has a pair of arms 11 equipped with a detachable joint 13 from a part to be jointed 12 of a lower case 9 on the free end, pivoting an upper cover 10 swingable on the same axis X3, mounting a handling part 14 connecting the other free ends of the both arms 11, a link arms 17 are mounted on the each arm 11 and the upper case 10, constituting a toggle mechanism 20 changing the energizing direction to the arm 11 bordering the upper side or the lower side of the virtual line connecting the swivel supporting point X4 of the link arm 17 to the upper case 10 and the swivel supporting point X3 of the arm 11 to the upper case 10, the joint part 13 is detachable from the part to be jointed 12 when the link arm 17 is shifting to the lower side of the virtual line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threshing apparatus mounted and mounted on a combine or the like, wherein the upper case for pivotally supporting a handling cylinder is swingably opened and closed vertically with respect to a lower case. About.

[0002]

2. Description of the Related Art Conventionally, in this type of threshing apparatus, in order to perform maintenance of a handling cylinder and a receiving net, the handling cylinder is swingably opened upward together with an upper case supporting the handling cylinder. It is well-known that a pair of a handle portion for swinging open and a pair of engagement means for locking the upper case in a closed state with the lower case are provided. It is known that a manual operation arm or the like for performing the operation is provided separately from the handle.

[0003]

However, in the above-mentioned conventional structure, a handle for lifting the upper case and an operating tool for locking and unlocking the upper case and the lower case are separately provided. Therefore, when the maintenance of the handling cylinder or the like is performed, the lock release operation is performed before opening the upper case in the closed state, and then the operation of manually lifting the handle is performed. On the other hand, when switching from the open state to the closed state, the handle portion is manually lowered to lower the upper case. At this time, a configuration that automatically locks the upper case and the lower case,
Locking by manual operation is known, but depending on the assembly error and the speed when lowering the upper case,
Simply lowering the upper case to the point where the upper case is stopped may not be sufficiently locked, and it is necessary to manually check whether or not the lock is correctly performed. was there.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a threshing apparatus which can open and close a handling cylinder with a simple operation and can lock with high certainty when closing. I do.

[0005]

(Structure) A threshing apparatus according to a first aspect of the present invention is configured such that an upper case for pivotally supporting a handling drum is swingably opened and closed vertically with respect to a lower case. , A pair of arms having an engaging portion at one free end portion that can be engaged with and disengaged from the engaged portion of the lower case is pivotally supported on the upper case so as to be swingable around the same axis. A handle is provided in a state where the other free ends of both arms are integrally connected to each other, and further, a link arm is provided over each of the arms and the upper case, and a swing fulcrum of the link arm with respect to the upper case is provided. A toggle mechanism that changes the direction of the urging force on the arm between an upper side and a lower side of the virtual straight line connecting the swing fulcrum of the arm with respect to the upper case, Above When the arm is moving,
The load of the upper case is set to be applied to the arm via the link arm, and the load of the upper case is applied to the arm when the link arm moves below the virtual straight line. Is released, and the engaging portion is configured to be able to be disengaged from the engaged portion.

(Operation) According to the first aspect of the present invention, the pair of arms and the handle part are integrally swung with respect to the upper case, so that the upper case is in the closed state. When lifting upwards, if the lifting operation is carried out by holding only the grip portion, in the initial stage of the lifting operation, the swing fulcrum of the link arm with respect to the upper case and the swing fulcrum of the arm with respect to the upper case are set. The link arm is located below the imaginary straight line that connects the
The engaging portion of the arm is disengaged from the engaged portion of the lower case, and can be pivoted upward without the load of the upper case being applied to the arm. When the handle is further lifted beyond the virtual straight line, the upward biasing elastic force is applied to the arm by the toggle mechanism, and the load of the upper case is applied to the arm. As a result, the upper case and, consequently, the handling cylinder are lifted upward and opened. Then, in order to close the upper case in the open state, by lowering the handle, the arm is moved below a virtual straight line connecting the swing fulcrum of the link arm to the upper case and the swing fulcrum of the arm to the upper case. The lower case is operated to a position where the upper case stops with a stopper or the like, whereby the swinging operation of the arm below the imaginary straight line causes the engaging portion to engage with the engaged portion. Since the operation is performed, the lock operation at the time of closing is performed in conjunction with the operation of lowering the grip portion without performing the engagement operation for each arm.

(Effects) Therefore, according to the structure of the first aspect of the present invention, the unlocking, the locking operation, and the opening / closing operation of the handle cylinder can be performed and closed by a simple operation only by moving the handle up and down. In this case, since the lock can be performed with high certainty, it is not necessary to perform a troublesome check operation of whether or not the lock has been performed one by one, and the workability can be improved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a combine equipped with a threshing apparatus 4 according to the present invention. In this combine, a cutting pre-processing device 3 is mounted on a front end portion of a body frame 2 supported by a pair of right and left crawler traveling devices 1 and 1 so as to be able to move up and down, and a threshing device 4 and a boarding operation unit 5 are mounted on the body frame 2. , A grain storage unit 6 and the like.

Then, as shown in FIG.
Is configured such that the threshing process is performed by the handling cylinder 8 when the grain stalks mowed by the pre-harvesting treatment device 3 are transported backward while being held by the feed chain 7. More specifically, as shown in FIGS. 2 to 5 and FIG.
Is an axis extending in the front-rear direction on an upper case 10 supported swingably openable and closable about an axis X2 extending in the front-rear direction with respect to a lower case 9 provided with a sorting mechanism S for sorting and processing threshing products. It is supported so as to be driven to rotate around the core X1. That is, as shown in FIGS. 2 and 3, the handle drum 8 is rotatably supported between the front and rear side walls 10F and 10R of the upper case 10.
Numeral 0 is pivotally supported with respect to the lower case 9 so as to be able to swing open and close around an axis X2 along the front-rear direction set at an upper part on the back side of the body.

Each of the side walls 10F, 10R has an arm 11, 1 swinging about the same axis X3 along the front-rear direction.
1 and one of the free ends of the arms 11 is engaged with engaging pins 12, 12 as engaged parts projecting from front and rear side walls 9 </ b> F, 9 </ b> R of the lower case 9. A hook 13 is formed as a detachable engaging portion. Also, the grip portion 1 is connected to the other free ends of the arms 11 in a state of being connected to each other.
4 are installed. As shown in FIG. 7, a step 16 is formed by cutting out a sheet metal flange 15 protruding from each of the side walls 10F and 10R, and when the upper case 10 is in the closed position, an arm is attached to the step 16. 11 are set so as to be able to contact with each other, and link arms 17, 17 are provided above the flange 15 over the respective arms 11 and the side walls 10F, 10R. One end of each of the link arms 17, 17 is rotatably supported on the corresponding side wall 10F, 10R so as to be rotatable around the same axis X4 along the front-rear direction. The other end of the link arm 17, 17 has a long hole 2
2, 22 are formed, and pins 23, 23 engaged in the elongated holes 22, 22, project from the corresponding arms 11, 11, and the pins 23, 23 have the same front-rear direction. The link arms 17, 17 are elongated around the axis X5.
Swingable in the engaged state. Further, the arm 1 extends over each arm 11 and the flange 15.
A first spring 18 for elastically urging the arm 1 downward and a second spring 19 for elastically urging the arm upward are provided. The first spring 18, the second spring 19, and the arm 11 forming a link mechanism that is swingable about the axis X 3, X 4, X 5 along the front-rear direction via the link arm 17, thereby enabling toggle. A mechanism 20 is configured. That is, an imaginary front view connects the position of the swing axis X3 as a swing fulcrum of the arms 11, 11 with respect to the upper case 10 and the position of the swing axis X4 of the link arm 17 as a swing fulcrum with respect to the upper case 10. When the link arm 17 is below the straight line L, the arm 11 is elastically urged downward. When the link arm 17 is above the virtual straight line L, the arm 11 is elastically urged upward. The toggle mechanism 20 is configured by setting the erection positions of the springs 18 and 19, and the virtual straight line L corresponds to a dead point at which the direction of the biasing force on the arm 11 in the toggle mechanism 20 changes. .
In the drawing, reference numeral 21 denotes a gas spring that applies an auxiliary force to the upper case 10 on the ascending side.

With the above configuration, when the upper case 10 is in the closed position, the hook 13 is urged by the first spring 18 and the second spring 19 to the side where the hook 13 engages with the engagement pin 12. Thus, the upper case 10 is locked so as not to be unduly opened in the engaged state. Then, the engagement is released and the upper case 10 is released.
When the operator lifts the handle portion 14 with the handle portion 14 upward, the hook 13 is engaged with the engagement pin 12 by the swing of the arms 11 and 11 around the axis X3. The handle 14 so that it is released.
Is lifted upward, so that the load of the upper case 10 that has not been applied to the arms 11, 11 via the link arms 17, 17, becomes greater than that of the imaginary straight line L.
When the pins 7 and 17 move upward and the pins 23 are locked at the ends of the elongated holes 22, they are applied to the arms 11 and 11. If the lifting force merely swings the arms 11 and 11, Instead, the upper case 10 is raised and swung around the axis X2. (See the two-dot chain line in FIG. 6)
The arms 11, 11 also come into contact with the step 16 on the upper side of the flange 15 during the ascending operation beyond the imaginary straight line L, and the contact portion also receives the load of the upper case 10. (See the two-dot chain line in FIG. 6) On the other hand, the upper case 1
To close the handle 0, the upward biasing force from the gas spring 21, the first spring 18, and the second spring 19 acts on the arms 11, 11 from the upper case 10 so that the handle is slightly felt. By lowering the portion 14, the upper case 10 is lowered, and the link arms 17, 17
Moves below the imaginary straight line L, the upper case 10 naturally descends due to the downward swinging power and the own weight of the arm 11, and stops at the closed position regulated by the stopper or the like. The swing of the arms 11 by the downward operation causes the hook 13 to
2 and will be locked.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a combine.

FIG. 2 is a longitudinal sectional side view showing a threshing apparatus.

FIG. 3 is a longitudinal rear view showing the upper part of the threshing apparatus in a closed state.

FIG. 4 is a longitudinal rear view showing the upper part of the threshing apparatus unlocked by an arm.

FIG. 5 is a longitudinal rear view showing the upper part of the threshing apparatus with the handling cylinder opened.

FIG. 6 is a rear view showing a relative relationship between the arm and the link arm.

FIG. 7 is a perspective view showing the upper part of the threshing device in a closed state.

[Explanation of symbols]

 Reference Signs List 8 handle cylinder 9 lower case 10 upper case 11 arm 12 engaged part 13 engaging part 17 link arm X3 shaft center (swinging fulcrum) X4 swinging fulcrum

Claims (1)

[Claims] 1. A threshing apparatus in which an upper case supporting a handling cylinder is swingably opened and closed up and down with respect to a lower case, wherein an engaging portion detachable from an engaged portion of the lower case is provided. A pair of arms provided at one free end is pivotally supported on the upper case so as to be swingable about the same axis, and the handle is held in a state where the other free ends of both arms are integrally connected. And a link arm extending between each of the arms and the upper case, and a boundary between a pivotal fulcrum of the link arm with respect to the upper case and a virtual straight line connecting the pivotal fulcrum of the arm with respect to the upper case. A toggle mechanism that changes the direction of the urging force on the arm between the upper side and the lower side, and when the link arm is moving above the imaginary straight line, the link arm moves through the link arm. The load of the lower case is set to be applied to the arm, and when the link arm is shifted below the virtual straight line, the load of the upper case is released from being applied to the arm, and the load of the upper case is released. A threshing device wherein the engaging portion is configured to be disengageable from the engaging portion.