JP4587405B2 - Working machine - Google Patents

Description

  The present invention relates to a work machine such as a broadcaster or a lime sower that is connected to the machine of a work vehicle.

2. Description of the Related Art Conventionally, a work machine including a work machine body that is detachably connected to the machine in a state where power can be transmitted from the machine of the work vehicle, and an operation lever for manually operating the work machine body has been widely used. in use.
Hereinafter, a broadcaster used for spraying fertilizer will be described as an example of such a working machine.

  Specifically, the broadcaster includes a work machine frame coupled to the work vehicle main unit, a hopper supported by the work machine frame, an impeller disposed below the hopper, the hopper and the blade. An opening / closing shutter disposed between the vehicles, a power transmission mechanism for transmitting power from the working vehicle main unit to the impeller, and an operation lever for operating the opening / closing shutter, and the operation lever By operating the opening / closing shutter through the fertilizer, the fertilizer accommodated in the hopper can be sprayed (see Patent Document 1).

By the way, the operation lever is configured such that a driver seated in a driver's seat of the work vehicle main unit can operate the operation lever in a state where the work machine frame is connected to the work vehicle main unit. Is preferred.
In consideration of this point, in the conventional broadcaster, the operation lever is configured by one long member whose angle can be adjusted, and the work machine frame is connected to the work vehicle main machine. The free end portion (gripping portion) of the operation lever is as close as possible to the driver's seat of the working vehicle main unit, but there are disadvantages in the following points.

That is, in the conventional configuration, since the operation lever is formed by one long member, when the broadcaster is raised by a hydraulic lifting mechanism provided in the work vehicle main unit, the operation lever is operated. There is a risk that the vehicle will enter the rear hatch opening / closing area of the vehicle and hinder the opening / closing operation of the rear hatch.
Further, in some cases, the operation lever may come into contact with the rear hatch, which may cause a problem that the operation lever and / or the rear hatch is damaged.
JP 2001-103821 A

  The present invention has been made in view of the prior art, a work machine comprising a work machine main body coupled to a work vehicle main machine, and an operation lever for manually operating the work machine main body, It is an object to provide a working machine that can effectively prevent the operating lever and the rear hatch from being damaged even if the operating lever comes into contact with the rear hatch in the working vehicle main unit.

  In order to achieve the above object, the present invention is a work machine including a work machine main body coupled to a work vehicle main machine and an operation lever for operating the work machine main body, wherein the operation lever includes: A base side member that is supported by the work machine main body so as to be rotatable about a pivot shaft along a vehicle width direction, and an operation unit side member held by an operator. A concave and convex portion provided on one and the other of the operating portion side member and the base side member, the concave and convex engaging portion having a concave portion and a convex portion that can be engaged with each other, and the concave and convex portion A biasing member that generates a biasing force in a direction to release the engagement of the joint portion, and the operation unit side member in a state where the engagement of the concave and convex engagement portion is released by the biasing force of the biasing member Can be bent and rotated with respect to the base side member, and In the state in which the concave and convex engaging portion is engaged against the urging force of the urging member, the operation member side member rotates so that the operation member side member rotates about the pivot shaft together with the base side member. A working machine characterized in that a member cannot be bent and rotated with respect to the base side member.

  Preferably, the operation side member may be held at a position where the concave portion and the convex portion face the base side member in a state where no external force is applied.

  For example, the work implement main body includes a work implement frame coupled to the work vehicle main unit, a hopper supported by the work implement frame and containing fertilizer, and an open / close shutter acting as the actuator, An opening / closing shutter that opens and closes according to the rotation of the side member around the pivot shaft may be provided.

  According to the working machine of the present invention, even if the rear hatch and the operation lever come into contact with each other, it is possible to effectively prevent the rear hatch and the operation lever from being damaged.

Embodiment 1
Hereinafter, preferred embodiments of a working machine according to the present invention will be described with reference to the accompanying drawings.
In the present embodiment, a broadcaster will be described as an example of the working machine.
FIG. 1 is a schematic side view of work vehicle 100 in a state where work implement 1 according to the present embodiment is connected.

  As shown in FIG. 1, the work machine 1 includes a work machine main body 10 that can be connected to the main machine 110 of the work vehicle 100, and an operation lever 30 for manually operating the work machine main body 10.

  The work machine body 10 includes a work machine frame 11 coupled to a work vehicle main machine 110, a hopper 12 supported by the work machine frame 11, and an impeller (not shown) disposed below the hopper 12. 1), an open / close shutter (not shown) disposed between the hopper 12 and the impeller, and a power transmission mechanism 13 for transmitting power from the working vehicle main body 110 to the impeller. Yes.

  The operation lever 30 is linked to the actuator (the opening / closing shutter) of the work machine body 10 in a state where it can be manually operated, and the opening / closing of the opening / closing shutter is adjusted by operating the operation lever 30. It is like that.

FIG. 2 is a partial longitudinal schematic view of the operation lever 30.
As shown in FIG. 2, the operation lever 30 includes a base side member 40 operatively connected to the open / close shutter, and an operation part side member 50 movably connected to the base side member 40. A biasing member 60 that biases the operation portion side member 50 in a direction in which the entire length of the base portion side member 40 and the operation portion side member 50 is shortened is provided.

The base-side member 40 is supported by the work machine frame 11 so as to be swingable about the pivot axis X, and swings about the pivot axis X, whereby the opening / closing shutter is connected via a link mechanism (not shown). Is adjusted.
In the present embodiment, the base side member 40 is a hollow case portion 41 that is swingably connected to the pivot shaft X, and a case portion that accommodates the operation portion side member 50 so as to freely advance and retract. 41.
Specifically, the case portion 41 includes an end wall 42 that is swingably coupled to the pivot shaft X, and a peripheral wall 43 that extends from the peripheral portion of the end wall 41 along the axial direction of the operation unit side member 50. Are integrally formed, and the front end side is an opening.
Further, the base portion side member 40 has a lid portion 45 connected to the case portion 41 so as to close the opening of the case portion 41.

The operation portion side member 50 is accommodated in the case portion 41 so as to be movable forward and backward so that a base end portion is located in the case portion 41 and a distal end portion extends outward from the case portion 41. .
Specifically, the operation unit side member 50 includes a shaft portion 52 having a proximal end portion located in the case portion 41 and a distal end portion extending outward from the case portion 41, and the case member 41. A flange portion 51 provided at a proximal end portion of the shaft portion 52 so as to be positioned, and a grip portion 53 provided at a distal end portion of the shaft portion 52 so as to be located outside the case portion 41. is doing.

  The lid portion 45 of the base portion side member 40 is provided with a through-hole having a diameter larger than that of the shaft portion 52 and smaller than that of the flange portion 51, so that the operation portion side member 50 is connected to the base portion. The operation unit side member 50 is movable forward and backward with respect to the base side member 40 while preventing it from being detached from the side member 40.

The shaft portion 52 and the through hole in the lid portion 45 are shaped so that the shaft portion 52 can move relative to the lid portion 45 in the axial direction and cannot move relative to the pivot axis X. Accordingly, when the operation part side member 50 is swung around the pivot axis X, the base side member 40 is swung around the pivot axis X in conjunction with the operation section side member 50. ing.
Instead of or in addition to this, the internal space of the case portion 41 and the flange portion 51 can be moved relative to the case portion 41 in the axial direction and the relative movement about the pivot axis X can be made. It is also possible to have a shape and dimension that makes it impossible.

The urging member 60 is disposed between the flange portion 51 and the lid member 45, and urges the flange portion 51 toward the end wall 42 of the case portion 41.
In other words, in a state where no external force is applied to the operation side member 50 (when the operation lever is not operated), the operation side member 50 is made as much as possible by the urging force of the urging member 60. In the state where the non-operation position accommodated therein is taken (see FIG. 2A) and the base member 40 is pulled out against the urging force of the urging member 60, the operation side member 50 is used. Takes an operation position protruding from the base side member 40 as much as possible (see FIG. 2B).

As described above, in the work machine 1 according to the present embodiment, in a state where no external force is applied to the operation side member 50, the operation side member 50 is automatically moved by the urging force of the urging member 60. The non-operating position is taken, and the operation lever 30 that combines the operation side member 50 and the base side member 40 is held in a compact state as much as possible.
Then, by pulling out the operation side member 50 against the urging force of the urging member 60, the operation side member 50 can be positioned at the operation position.

Therefore, when operating the opening / closing shutter which is an actuator of the work machine 1, the operation side member 50 is positioned at the operation position, so that the grip portion 53 of the operation side member 50 is moved to the driver's seat of the work vehicle main unit 110. It is possible to make the access to the operation side member 50 in a state of being seated in the driver's seat as easy as possible.
On the other hand, when the opening / closing shutter which is the actuator of the work machine 1 is not operated, the operation side member 50 is automatically positioned at the non-operation position, whereby the operation side member 50 is moved to the work vehicle main unit 110. Can be effectively prevented from touching.

  Preferably, as shown in FIG. 1, the non-operating position is a position for retracting from the opening / closing locus of the rear hatch 120 in the work vehicle main body 110, and the operating position is a position for entering the opening / closing locus of the rear hatch 120. By doing so, it is possible to effectively prevent the inconvenience that the operation lever 30 hinders the opening and closing of the rear hatch 120 during non-operation while bringing the operation lever 30 as close as possible to the driver's seat during operation.

Preferably, an artificial operation member 70 having one end connected to the operation lever 30 and the other end connected to the work vehicle main unit 110 is provided between the work machine 1 and the work vehicle main unit 110. Thus, it is possible to provide an artificial operation member 70 that can change the position of the operation lever 30 from the non-operation position to the operation position based on an artificial operation.
By comprising in this way, the said operation part side member 50 can be easily changed in position from the non-operation position to the operation position.
In the present embodiment, as shown in FIG. 1, one end of the artificial operation member 70 is connected to the operation unit side member 50 and the other end is a fender 130 in the work vehicle main unit 110. The cord connected to the rear part is used. Such a cord-like body is preferably one having flexibility such as a string or a chain.

Embodiment 2
Hereinafter, other embodiments of the working machine according to the present invention will be described with reference to the accompanying drawings.
In FIG. 3, the schematic diagram of the operation lever 230 in the working machine which concerns on this Embodiment is shown.

The working machine according to the present embodiment has substantially the same configuration as the working machine 1 according to the first embodiment except that the operating lever 230 is provided instead of the operating lever 30.
Accordingly, only the operation lever 230 will be described below.

  The operation lever 30 in the first embodiment is configured to be as compact as possible in the non-operation position and to be extended as much as possible in the operation position. When the operation lever 230 is in the non-operation position, the following operation unit side member 250 can move relative to the following base side member 240 (see FIGS. 3A and 3B), and when the operation lever 230 is in the operation position. The operation part side member 250 and the base part side member 240 cannot be moved relative to each other (see FIG. 3C).

  Specifically, the operation lever 230 includes the base side member 240 that is operatively connected to an opening / closing shutter that is an actuator of the work machine 1, the operation unit side member 250 that is gripped by a user, And a biasing member 260 that connects the base side member 240 and the operation part side member 250.

Like the base side member 40, the base side member 240 is supported by the work machine frame 11 so as to be swingable about the pivot axis X in a state in which the base side member 240 is operatively connected to an opening / closing shutter that is an actuator of the work machine 1. ing.
The operation unit side member 250 is held in a connection relationship with the base side member 240 only by the biasing member 260 while being coaxially positioned with the base side member 240, and the biasing member 260. Is biased in a direction away from the base side member 240.

Specifically, the operation unit side member 250 and the base unit side member 240 have concave and convex engaging portions 300 and 310 on opposing end surfaces, and the operation unit side member 250 is used as a biasing force of the biasing member 260. By pushing against and engaging the concave and convex engaging portions 300 and 310, the operation portion side member 250 and the base portion side member 240 cannot be relatively moved around the pivot axis X, and the operation portion The operating force of the side member 250 is transmitted to the base side member 240.
When no external force is applied to the operation portion side member 250, the operation portion side member 250 is moved by the biasing member 260 so that the engagement of the concave and convex engagement portions 300 and 310 is released. While being urged away from the side member 240, the urging member 260 maintains the connection relationship with the base side member 240.
In the present embodiment, the operating portion side member 250 is provided with a convex portion 310, and the base portion side member 240 is provided with a concave portion 300 corresponding to the convex portion 310. It is also possible to provide the side member 250 with the concave portion 300 and provide the base side member 240 with the convex portion 310.

In the working machine 1 having such a configuration, the following effects can be obtained.
That is, when the operation lever 230 is not operated, the operation unit side member 250 is connected and held only by the urging member 260 in a state where the concave and convex engagement with the base side member 240 is released. (See FIG. 3 (a)).
Therefore, in order to facilitate access to the operation unit side member 250 in the state of being seated on the driver's seat of the work vehicle main unit 110, the free end portion (gripping portion) of the operation unit side member 250 is used as a work vehicle. When close to the machine 110 as much as possible, the operation unit side member 250 enters the open / close region of the rear hatch 120 in the work vehicle main unit 110 and the rear hatch 120 interferes with the operation unit side member 250. Even so, the urging member 260 is bent to effectively prevent the operation portion side member 250 and / or the rear hatch 120 from being damaged (see FIG. 3B).

  On the other hand, when the operation lever 230 is operated, the operation unit side member 250 is engaged with the base side member 240 in a concave-convex manner against the urging force of the urging member 260. Therefore, the opening / closing shutter can be operatively operated by transmitting an operating force to the base side member 240 (see FIG. 3C).

  As described above, in the work machine according to the present embodiment, the operation side member 250 in a state where the operation unit side member 250 is seated as close as possible to the driver's seat of the working vehicle main body and is seated in the driver's seat. Even if the operation unit side member 250 comes into contact with the rear hatch 120, the biasing member 260 bends to allow the opening and closing operation of the rear hatch 120 to be permitted. Damage to the operation unit side member 250 and / or the rear hatch is effectively prevented.

FIG. 1 is a schematic side view of a work vehicle in a state where work machines according to an embodiment of the present invention are connected. FIG. 2 is a partial longitudinal schematic view of the working machine shown in FIG. FIG. 3 is a schematic diagram of an operation lever in a working machine according to another embodiment of the present invention. FIG. 3A shows a normal state where the operation lever is located at the non-operation position and no external force is applied to the operation lever. FIG. 3B shows a state in which the operation lever is located at the non-operation position and an external force is applied to the operation unit side member of the operation lever. FIG. 3C shows a state where the operation lever is located at the operation position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work implement 10 Work implement main body 100 Work vehicle 110 Work vehicle main body 120 Rear hatch 230 Operation lever 240 Base side member 250 Operation portion side member 260 Energizing member 300 Concave portion 310 Convex portion

Claims (3)

A work machine comprising a work machine body coupled to the work vehicle main body and an operation lever for operating the work machine body,
The operation lever is operatively connected to the actuator of the work implement main body, and the operator holds the base side member supported by the work implement main body so as to be rotatable about a pivot shaft along the vehicle width direction. An operation part side member, and a concave and convex engaging part provided on one and the other of the operation part side member and the base part side member, the concave and convex engaging part having a concave part and a convex part that can be engaged with each other; A biasing member that generates a biasing force in a direction to release the engagement of the concave and convex engaging portion, and in a state where the engagement of the concave and convex engaging portion is released by the biasing force of the biasing member The operation member side member can be bent and rotated with respect to the base member side member, and the operation member side member is engaged with the concavo-convex engagement portion against the urging force of the urging member. So as to rotate around the pivot shaft together with the base side member. Working machine, characterized in that the operation unit side member is unrotatable bent relative to the base member.   The work machine according to claim 1, wherein the operation side member is held at a position where the concave portion and the convex portion face the base side member in a state where no external force is applied. .   The working machine main body includes a working machine frame coupled to the working vehicle main machine, a hopper supported by the working machine frame and containing fertilizer, and an opening / closing shutter that functions as the actuator, the base side member The working machine according to claim 1, further comprising an opening / closing shutter that opens and closes in response to rotation about the pivot shaft.

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