JPH0721487Y2 - Control device for winch control lever of mobile crane - Google Patents

Description

[Detailed Description of the Invention] "Industrial application field" The present invention relates to an operating device for a winch control lever of a mobile crane. More specifically, the present invention relates to an operating device for a control lever of a winch for lifting and lowering a luggage, which is erected in a driver's seat of a mobile crane such as a wheel crane so as to be rotatable front and back from a floor surface of a seat side portion thereof.

"Prior Art" FIG. 6 is a side view showing a conventional operating device of this type with a main part cut away.

As shown in the figure, in the conventional operation device of this type, the lower part of the control lever 3 which is erected is fixed to the collar 2 which is rotatably fitted on the left and right shafts 1, and the interposition is provided. The upper end of the member 4 was fixed. The connecting rod 5 connected to the operation adjusting portion of the winch was pivotally attached to the lower end of the interposition member 4. In the figure, 6 is a cover.

Therefore, the control lever 3 is appropriately rotated back and forth from the neutral position shown by the solid line in the figure, and is tilted slightly forward and backward within the limit of the forward and backward operating positions shown by the imaginary line in the figure, so that the connecting rod via the collar 2 and the interposition member 4 is connected. The winch operation was performed by moving the 5 forward and backward by the corresponding amount. The predetermined operating range α of the control lever 3, that is, both operating ranges α from the neutral position shown by the solid line in the figure to the front and rear operating positions shown by the imaginary line in the figure, the advancing / retreating of the connecting rod 5 which is always integrally displaced. Inevitably regulated by limits. Therefore, it has been impossible to pivot the control lever 3 back and forth and tilt it further.

"Problems to be solved by the invention" By the way, the following problems have been pointed out in such a conventional operating device.

FIG. 4 is a schematic side view of the cab, which is used to explain the predetermined operating range α of the control lever 3. In the figure, 8 is a driver's seat and 9 is a steering wheel.

The control lever 3 is shown in FIG.
As shown in the figure, it has been conventionally pointed out that it is an obstacle when the passenger gets on and off the vehicle because it cannot be tilted back and forth more than a predetermined operating range α. That is, the control lever 3 is slightly tilted back and forth within the limit of the front and rear operating position indicated by the imaginary line. Therefore, the control lever 3 protrudes from the seat 8 on the side of the seat 8 (see FIG. 4) of the driver's seat of the cab 7 and maintains a substantially standing posture, which hinders getting on and off between the cab 7 and the ground. It was.

Such a point has been pointed out in the conventional example.

The present invention has been made in order to solve the above-mentioned problems of the conventional example in view of the above circumstances, and the control lever is rotated within a predetermined operating range and slightly tilted back and forth during a normal winch operation. On the other hand, when getting in and out of the winch, it will be pivoted to the evacuation range outside the operating range and will fall greatly back and forth, so it will not interfere with getting in and out, and it is easy to operate due to its simple structure. The purpose is to propose an operating device for a winch control lever of a mobile crane that is realized.

"Means for Solving the Problem" The technical means of the present invention for achieving this object are as follows.

This operating device for a winch control lever of a mobile crane relates to a control lever of a winch for lifting and lowering a luggage, which is erected in a driver's seat of a cab of a mobile crane so as to be rotatable forward and backward from a floor surface of a side portion of the seat.

The operating device includes a left-right shaft provided along the left-right direction of the cab, a first collar rotatably fitted to the left-right shaft, and a support member vertically fixed to the first collar. The control lever has a lower portion inserted into the hole of the support member and is erected, and further has the following lock member, spring, second collar, guide lever, interposing member, connecting rod and the like.

The lock member has a base end fixedly attached to the control lever and is installed laterally, and has a lock projection at the tip. A spring is attached to the control lever between the lock member and the support member.

The second collar is rotatably fitted around the left and right shafts side by side with the first collar. In the guide lever, the base end is fixed to the second collar and the tip is bent to form a lock hole, and in a normal state of performing a winch operation, the lock protrusion of the lock member is inserted into the lock hole by the urging force of the spring. Engaged.

The interposition member has one end fixed to the second collar. The connecting rod has a distal end pivotally attached to the other end of the interposing member, and a proximal end connected to an operation adjusting portion of a winch so that the connecting rod can move forward and backward by a predetermined amount.

"Operation" Since the operating device for the winch control lever of the mobile crane according to the present invention comprises such means, it operates as follows.

First, in the normal operation of the winch:

That is, the control lever is rotated about the left and right shafts via the support member and the first collar within the predetermined operating range regulated by the advancing / retreating of the connecting rod, and is slightly tilted back and forth.

And when the control lever is rotated in this way,
Through the lock member, the lock protrusion thereof, the lock hole engaged with the lock protrusion by the urging force of the spring, and the like, the guide lever also rotates correspondingly. By this rotation of the guide lever, the second collar and the interposed member also rotate around the left and right shafts, and the connecting rod is moved back and forth by a corresponding amount. As a result, the operation adjusting unit such as the motor is controlled, the winch operation of the mobile crane is performed, and the load and the like are moved up and down.

Next, when getting on and off other than when operating the winch, follow the steps below.

That is, first, the control lever is pushed downward against the biasing force of the spring. Then the spring is compressed,
The engagement between the lock protrusion of the lock member and the lock hole is released. Therefore, the control lever is disconnected from the guide lever, the second collar, the interposition member, the connecting rod, and the like.
Therefore, the control lever is released from the restriction due to the limit of forward and backward movement of the connecting rod, and can be largely rotated to the retracted range outside the operating range. That is, the control lever can be largely rotated about the left and right shafts via the support member and the first collar, and can be largely tilted to the front and rear retracted positions.

Therefore, firstly, the control lever does not interfere with getting on and off between the ground and the driver's seat of the cab when getting on and off. Secondly, and yet it is easy to operate with a simple construction.

[Embodiment] The present invention will be described in detail below based on the embodiment shown in the drawings.

First, the construction and the like will be described in the order of the crane vehicle and the operating device of the present invention.

The outline of the mobile crane is as follows.

FIG. 7 is a side view of a wheel crane which is an example of a mobile crane. In the wheel crane, traveling operation and crane operation such as winch operation are collectively performed in one driver seat of the cab 7.

First, front and rear wheels 11 are arranged on the chassis 10, and the upper portions of the front and rear wheels 11 are covered by fenders 12, which are tire houses. A turntable 13, which is a turntable located between the front and rear wheels 11, is mounted on the chassis 10.
13 is rotationally driven in the reverse direction so that it can turn.

A boom 14 is rotatably supported by a hoisting cylinder 15 and a pin (not shown) at the center of the swivel base 13. The boom 14 is of a multi-stage type that can be expanded and contracted, and a cylinder, a wire, and the like (not shown) are used to carry out overhanging and fitting and storing of the second and subsequent stages. A hoisting device is attached to the boom 14. That is, sheaves 16 are axially attached to the front and rear ends of the boom 14, and wires (not shown) are hung between the sheaves 16 and are wound by a winch operation of a winch in an operation chamber described later. Taking and rewinding are performed. A hook for hooking and lifting an object is attached to the tip of the wire, so that the object hooked on the hook is moved up and down by a winch operation.

The cab 7 is fixedly installed on the swivel 13 along with the boom 14. That is, since the boom 14 is located at the center of the swivel base 13, the cab 7 is fixedly installed in a state of being aligned with the boom 14 and slightly protruding laterally from the swivel base 13. The cab 7 has a vertically long shape, and is internally provided with a driver's seat and an auxiliary seat for performing traveling operation, winch operation, and other crane operations, and a driver and an operator are normally on board. Doorway on the side of cab 7
17 is formed, and the doorway 17 is opened and closed by a slide door 18, and the slide door 18 is provided with a window 19.

It is located on the swivel base 13 at the rear of the cab 7 and is located in the working chamber 20.
Is provided, and the winch or the like described above is arranged in the working chamber 20. In the figure, 21 is a step for raising and lowering to the cab 7, etc., 22 is a bumper provided in the front part of the chassis 10, and 23 is a rearview mirror standing from the bumper 22. Reference numeral 24 is a jack outrigger, and this outrigger 24 stably holds the wheel crane on the ground during work.

The outline of the mobile crane is like this.

Next, the operating device of the present invention will be described.

1, 2 and 3 show an embodiment of the present invention. FIG. 1 is a front sectional view thereof. FIG. 2 is a side view with a main part cut away, and is used for explanation of the operating range α of the control lever 3 in a normal state. FIG. 3 is a side view in which the relevant part is also cut away, and is used for explaining the retreat range β of the control lever 3 and the like. See also
The figure is a schematic side view of the cab 7 as described above, and is used to explain the operating range α of the control lever 3 in the normal state. FIG. 5 is a schematic side view of the cab 7 as well, and is used for explaining the retreat range β of the control lever 3 and the like.

This operating device controls a winch for lifting and lowering a load, which is erected in the driver's seat of the cab 7 of a crane vehicle so as to be rotatable back and forth from a floor surface 25 on the side of the seat 8 (see FIGS. 4 and 5). It relates to the lever 3.

First, a case-shaped cover 6 is fixed on the floor surface 25 on the side of the seat 8 of the cab 7, and the left and right shafts 1 are fixed in the cover 6 along the left-right direction of the cab 7. . A first collar 26 is rotatably fitted on the left and right shafts 1, and a side portion of the short tubular first collar 26 is provided with a vertically short tubular support member.
27 is stuck. The lower part of the control lever 3 is inserted into the hole of the support member 27, and the upper part of the control lever 3 is erected largely outside the cover 6 while being held by a spring 28 or the like described later.

A base end of a lock member 29 is fixed to the control lever 3 in the cover 6. The lock member 29 is horizontally installed in the form of a straight plate, and a lock protrusion 30 such as a lock pin is provided on the upper side of the tip. Further, between the base end of the lock member 29 and the upper end of the support member 27, the control lever 3
A spring 28 is attached to the spring 28, and the spring 28 constantly biases and holds the control lever 3, the lock member 29 and the like upward.

On the other hand, a second collar 31 is rotatably fitted around the left and right shafts 1 along with the first collar 26. The guide lever 32 is provided on the upper surface of the second collar 31 having the short tubular shape.
The base or lower end of is fixed. The guide lever 32 is
For example, it has a substantially fan shape, and its tip, that is, its upper end is bent, and a lock hole 33 is formed in the bent arc-shaped edge portion. The lock hole 33 of the guide lever 32 is provided in a shape and position that vertically correspond to the lock protrusion 30 of the lock member 29 described above. The lock hole 33 engages with the lock protrusion 30 by the urging force of the spring 28, as shown in FIGS. 1 and 2, in the normal state of performing the winch operation. When the control lever 3 is pushed downward against the urging force of the spring 28, the lock member 29 and the lock projection 30 are lowered and the engagement between the lock projection 30 and the lock hole 33 is released, as shown in FIG. It

An upper end which is one end of a substantially flat plate-shaped interposition member 34 is fixed to the lower surface of the second collar 31. The tip of the connecting rod 5 is pivotally attached to the lower end, which is the other end of the interposition member 34, by a pin or the like. The connecting rod 5 extends horizontally and its base end is the working chamber 20 (see FIG. 7). (See), and is connected to an operation adjusting portion (not shown) of a winch. The connecting rod 5 can move back and forth by a predetermined amount, whereby the operation adjusting portion such as a motor is controlled, the winch is rotationally driven in the forward and reverse directions, and its rotational speed is changed.

A long groove-shaped opening 35 is formed in the front and rear of the upper surface of the cover 6. And the control lever 3 has this opening
It is loosely inserted in the top and bottom with respect to 35, and can be rotated back and forth along with the long groove-shaped opening. When the winch is operated, the control lever 3 is restricted by the forward / backward movement of the connecting rod 5 and within the operating range α shown in FIGS. 2 and 4, that is, the forward / backward operation of the phantom line in the figure from the neutral position shown in the solid line in the figure. Each position can be rotated. Further, the control lever 3 is restricted by the front and rear ends of the opening 35 at the time of getting on and off, and is rotatable within the retracted range β shown in FIGS. 3 and 5. In this case, the control lever 3 is held at the front and rear retreat position indicated by the imaginary line in the figure by contacting the front and rear ends of the opening 35.

The operating device is thus configured.

The above is the description of the configuration and the like.

The operation and the like will be described below.

First, in the normal operation of the winch:

That is, as shown in FIG. 2 and FIG. 4, the control lever 3 of the operating device is moved to the left and right through the support member 27 and the first collar 26 within a predetermined operating range α restricted by the forward / backward movement of the connecting rod 5. It is rotated around the axis 1 and tilted slightly back and forth.

When the control lever 3 is pivoted back and forth in this manner and is tilted between the neutral position shown by the solid line in the figure and the forward / backward operating position shown by the phantom line in the figure, the lock member 29, its lock projection 30, and the lock projection 30 are spring-loaded. The guide lever 32 correspondingly pivots back and forth through the lock hole 33 and the like engaged by the biasing force of 28.

By the rotation of the guide lever 32, the second collar 31 and the interposition member 34 are also rotated back and forth around the left and right shaft 1, and the connecting rod 5 is linearly moved forward and backward by a corresponding amount. Then, by moving the connecting rod 5 forward and backward, the operation adjusting portion such as a motor is controlled, the winch is appropriately rotated in the forward and reverse directions, and the number of rotations thereof is appropriately changed. As a result, the wire is taken up and unwound, and the luggage or the like hooked at the tip of the wire is moved up and down.

The winch operation is performed in this way.

Next, when getting on and off other than when operating the winch, follow the steps below.

That is, as shown in FIG. 3, first, the control lever 3 of the operating device is pushed downward against the urging force of the spring 28. Then, the spring 28 is compressed from its vertical length L ₁ (see FIG. 2) to the vertical length L ₂ , the locking protrusion 30 of the locking member 29 is lowered, and the engagement between the locking protrusion 30 and the locking hole 33 is released. To be done. Therefore, the control lever 3 is disconnected from the guide lever 32, the second collar 31, the interposition member 34, the connecting rod 5, and the like.

Therefore, the control lever 3 is also released from the restriction due to the forward and backward movement of the connecting rod 5, and as shown in FIGS. 3 and 5, can be largely rotated to the retreat range β outside the operating range α. That is, the control lever 3 pivots back and forth about the left-right shaft 1 through the support member 27 and the first collar 26, and greatly falls from the neutral position shown by the solid line in the figure to the retracted position shown by the imaginary line in the figure. Can be included. At this time, since the guide lever 32, the second collar 31, the interposition member 34, the connecting rod 5, etc. are disconnected from the lock member 29, the control lever 3, etc., the control lever 3 rotates. Is also stopped.

Now, when getting on and off like this, the control lever 3
Is retracted, the operation device is as follows.

Firstly, the control lever 3 does not interfere with getting on and off between the ground and the driver's seat of the cab 7 when getting on and off.

That is, the control lever 3 projects from the seat 8 on the side of the seat 8 of the driver's seat of the cab 7 and does not maintain a posture within the operating range α substantially standing up (see FIGS. 2 and 4), and the retreat range. The vehicle has been rotated by β to a large extent and is retracted to the front and rear retracted positions indicated by imaginary lines in the figure, which do not project from the seat 8 and are largely inclined toward the floor surface 25 (see FIGS. 3 and 5). Therefore, in this operating device, the driver, the worker, and the like have the control lever 3 which is tilted to the front and rear retracted positions.
You can get on and off the cab 7 through the top without any trouble.

Secondly, and because of its simple construction, it is easy to operate. That is, this is realized by attaching the lock member 29, the guide lever 32, the second collar 31, etc., and without using a gear or the like, the construction of this operating device is relatively simple. Further, the front-back retracted position of the control lever 3 can be obtained by pushing it downward with one hand and then rotating it back and forth, which makes the operation easy.

The above is the description of the operation and the like.

[Advantage of the Invention] As described above, in the operating device for the winch control lever of the mobile crane according to the present invention, the control lever is rotated within a predetermined operating range and slightly tilted back and forth during normal winch operation. On the other hand, at the time of getting on / off the vehicle outside the operation of the winch, it is rotated to the retreat range outside the operating range and largely falls back and forth, so that the following effects are exhibited.

That is, first, the control lever does not interfere with getting on and off. In other words, the control lever will be greatly collapsed when getting on and off, so that it does not interfere with getting on and off between the ground and the driver's seat of the cab.

Secondly, this is realized by a relatively simple structure without using a gear or the like, and is excellent in cost.
This is also done by pushing the control lever down with one hand and rotating it back and forth, which is easy to operate and is excellent in efficiency.

In this way, the problems existing in this type of conventional example are eliminated, and the effects of the present invention are remarkable and significant.

[Brief description of drawings]

1, 2, and 3 show an embodiment of an operating device for a winch control lever of a mobile crane according to the present invention. And FIG. 1 is a front sectional view thereof. Figure 2 shows
FIG. 3 is a side view in which a main part is cut away, and is used for explaining an operating range of a control lever in a normal state and the like. FIG. 3 is a side view in which the main part is similarly cut away, and is used for explaining the retreat range of the control lever and the like. FIG. 4 is a schematic side view of the cab, which is used to explain the operating range of the control lever in the normal state. FIG. 5 is also a schematic side view of the cab, and is used for explaining the retracting range of the control lever and the like. FIG. 6 is a side view showing an operating device for a winch control lever of a mobile crane according to a conventional example, in which a main part is cut away. FIG. 7 is a side view of the mobile crane. 1 ... Left and right shaft 3 ... Control lever 5 ... Connecting rod 7 ... Cab 8 ... Seat 25 ... Floor 26 ... First collar 27 ... Support member 28 ... Spring 29 ... Lock member 30 ... Lock protrusion 31 ... Second collar 32 ... Guide Lever 33 ... Lock hole 34 ... Interposition member

Claims (1)

[Scope of utility model registration request] 1. An operating device for a control lever of a winch for lifting and lowering a luggage, which is erected in a driver's seat of a cab of a crane vehicle so as to be rotatable forward and backward from a floor of a seat side of the cab. A left and right shaft provided along the left and right direction, a first collar rotatably fitted to the left and right shaft, a support member vertically fixed to the first collar, and a lower portion in a hole of the support member. And the control lever that has been installed upright and the base end is fixed to the control lever and is installed horizontally.
A lock member having a lock protrusion at its tip, a spring attached to the control lever between the lock member and the support member, and a rotatably external fitting on the left and right shafts side by side with the first collar. And a lock end formed by fixing the base end to the second collar and bending the front end to form a lock hole. In a normal state of performing a winch operation, the lock member is locked in the lock hole by the urging force of the spring. A guide lever with which the locking protrusion is engaged, an interposition member having one end fixed to the second collar, a tip pivotally attached to the other end of the interposition member, and a base end connected to an operation adjusting portion of a winch. An operating device for a winch control lever of a mobile crane, comprising: a connecting rod that can be moved back and forth by a predetermined amount.