JP2001220088A - Winch attaching/detaching apparatus of mobile crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winch attaching/detaching apparatus of a mobile crane which requires no separate crane in attaching/detaching a sub winch, and is excellent in attachment/detachment workability. SOLUTION: This winch attaching/detaching apparatus comprises a winch case having a winch drum, a reduction gear and a hydraulic motor in a box-like case, a winch connector which is arranged between a rear end of a turntable and the winch case, and capable of connecting the winch case to the rear end of the turntable, and a perpendicular cylinder which is fitted to the winch case and vertically moves the winch case between a vehicle frame and the rear end of the turntable through the expansion/contraction thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winch attaching / detaching apparatus for a mobile crane, which is configured so that a winch can be attached to and detached from a rear end portion of a swivel that is pivotally mounted on a frame of a vehicle.

[0002]

2. Description of the Related Art In general, a mobile crane has a winch disposed at the rear end of a swivel. A wire rope extended from the winch is guided to the distal end of the telescopic boom along the upper surface of the telescopic boom. Part and is connected to a hanging load hook. A wire rope is extended by a winch at the rear end of the swivel base, and is wound up, so that the suspended load suspended by the suspension hook is lifted and suspended.

In addition, two types of winches for a mobile crane, a main winch and a sub winch, are arranged at the rear end of a swivel table, and the main winch and the sub winch can be used properly depending on a load operation using a boom or a jib. Many are configured as such. Furthermore, in order to reduce the weight during traveling,
There is also known one in which the sub winch is configured to be detachable. In such a case, the main and sub winches are arranged back and forth at the rear end of the swivel, the winch arranged at the front is arranged inside the rear end structure of the swivel, and the winch arranged at the rear is the winch constituting the winch. The drum, reduction gear, and hydraulic motor are mounted on a box-shaped winch case, and the winch case can be removed from the swivel base as necessary. In this case, a connecting device is arranged between the rear end of the swivel table and the winch case so that the connection can be released.

[0004]

As described above, in the operation of attaching and detaching a winch with a movable crane having a detachable winch at the rear end of the swivel table, it is necessary to suspend the winch case by another crane. Therefore, a separate crane was required each time a winch was attached to or detached from the rear end of the swivel at the crane work site. In addition, the work of positioning and installing the winch case suspended by a crane at the rear end of the swivel table requires skill and the workability is poor.

Accordingly, an object of the present invention is to provide a winch attaching / detaching apparatus for a mobile crane which does not require a separate crane for attaching / detaching the winch and has excellent workability in attaching / detaching.

[0006]

SUMMARY OF THE INVENTION A winch attaching / detaching device for a mobile crane according to the first aspect of the present invention is provided with a swivel table which is rotatably mounted on a frame of a vehicle and has a telescopic boom which can be raised and lowered, and a box. A winch drum, a speed reducer, a winch case in which a hydraulic motor is attached to a case, and a rear end portion of the swivel table and the winch case,
A winch connection device capable of connecting a winch case to a rear end of the swivel, and a vertical device attached to the winch case and vertically moving the winch case between the vehicle frame and the rear end of the swivel by expansion and contraction. And a cylinder.

With this configuration, the winch case is raised to the connecting position of the rear end of the swivel base by extending the vertical cylinder of the winch case mounted on the frame of the vehicle, and the winch case is mounted on the rear end of the swivel base. You can do it.

Further, the invention of claim 2 of the present application, in addition to the invention of claim 1, guides the vertical movement of the winch case by the vertical cylinder disposed between the rear end of the swivel table and the winch case. It is characterized by having guide means.

With this configuration, when the winch case is lifted by the vertical cylinder, the guide means disposed between the rear end of the swivel base and the winch case guides the winch case along the rear end of the swivel base, so that the winch case can be accurately positioned. The winch case can be quickly moved to the connection position at the rear end of the swivel.

According to a third aspect of the present invention, in addition to the first or second aspect, the vertical cylinder is attached to the winch case with the rod side facing downward, and a counter is attached to the tip of the rod. A weight for engaging and disengaging the counterweight mounted on the vehicle frame, and the vertical cylinder is reduced to reduce the weight of the counterweight. It can be pulled up.

[0011] With this configuration, in a state where the winch case is connected to the rear end of the swivel base, the vertical weight is used to pull up the counterweight placed on the frame of the vehicle, thereby lowering the winch case. Can be fitted with a counterweight.

[0012]

FIG. 1 shows a winch attaching / detaching device 11 according to an embodiment of the present invention. FIG. 2 is a diagram of FIG.
It is an arrow view. Hereinafter, a configuration according to an embodiment of the present invention will be described with reference to FIGS.

Reference numeral 1 denotes a turntable, which is a frame 12 of the vehicle.
It has a telescopic boom (not shown) which is pivotably mounted on the top and which can be raised and lowered, and a main winch 2 is mounted on a rear portion thereof. Reference numeral 6 denotes a winch case having a box-like shape, and a winch drum 13, a speed reducer 23, and a hydraulic motor 15 constituting the sub winch 5 are attached to the winch case. Reference numeral 7 denotes a vertical cylinder which is attached to the winch case 6 as a pair of left and right, and moves the winch case 6 up and down between the upper portion 12 of the vehicle frame and the rear end 1a of the swivel 1 by expansion and contraction.

A winch connecting device 4 is disposed between the rear end 1a of the swivel base 1 and the winch case 6 and connects the rear end 1a of the swivel base to the winch case 6.
The winch connecting device 4 includes a pair of upper and lower boss members 14 and 15 protruding to the left and right of the swivel base rear portion 1a, and a pair of upper and lower boss members 16 and 17 protruding to the left and right of the front end portion 6a of the winch case 6. And a connecting pin 18 and a driving cylinder 19 thereof. When connecting the rear end 1a of the swivel base 1 and the winch case 6, the boss members 14 and 16 and the boss members 15 and 17 are formed by overlapping the connection pins 18 with the holes overlapping each other. Are penetrated by the drive cylinder 19 so that they are firmly connected to each other.

A guide means 10 is disposed between the rear end 1a of the swivel table and the winch case 6 and guides the vertical cylinders 7, 7 to move the winch case 6 up and down. The guide means 10 includes a pair of left and right rollers 20 at the front end 6a of the winch case 6,
20 and a guide surface 21 at the rear end 1a of the turntable.

Numeral 8 is a counterweight engaging / disengaging means,
The vertical cylinder 7 is attached to the winch case 6 with the rod side facing downward. The vertical cylinder 7 includes a rod tip 7 a and a hole 22 of the counterweight 9. As shown in FIG. 2, the distal end portion 7 a of the vertical cylinder 7 has a substantially rectangular rod tip fitting 25, and is provided on the upper surface of the substantially rectangular counterweight 9 which is slightly larger than the rod tip fitting 25. When the direction of the long side and the short side of the rectangle coincides with the hole 26 provided, entry and exit are free. Further, a rod rotating device 27 is disposed above the vertical cylinder 7, and the rod rotating device 27 rotates the rod of the vertical cylinder 7 to rotate the rod end fitting 25 by 90 degrees with respect to the cylinder tube. It has become possible.

In the counterweight 9 shown in FIG. 1, the hole 22 is shown by hatching the cross section of the counterweight 9. The inside of the hole 22 is wider than the hole 26 on the upper surface of the counterweight, and forms a jaw 28 with which the tip metal fitting 25 rotated by 90 degrees is engaged. At the center of the hole 22, a table 30 is disposed on the bottom of the hole 22, so that the metal fitting 25 of the vertical cylinder 7 comes into contact with the table.

A pair of support members 31 are disposed on the left and right sides of the upper surface of the counterweight 9, and the winch case 6
A pair of round bars 32 projecting from the left and right engage with each other. As described above, the winch case 6 and the counterweight 9 are formed by placing the two vertical cylinders 7 and the round bar 32 protruding from the side of the winch case on the table 30 and the support member 32 on the counterweight 9 side. The winch case 6 and the counterweight 9 are generally transported together in this state.

The operation of the winch attaching / detaching device 11 configured as described above is as follows. As shown in FIG. 1, the winch case 6 and the counterweight 9 that have been integrally transported are mounted on the frame 1 of the vehicle at the rear of the swivel 1.
The roller 20 of the guide means 10 is placed on the guide 2 so as to contact the guide surface 21 of the rear end 1a of the turntable. Next, a hydraulic hose (not shown) drawn from the winch case 6 side is connected to a hydraulic outlet at the rear of the swivel base in order to connect a hydraulic source for driving the vertical cylinder 7, the driving cylinder 19 of the connecting device, and the rod rotating device 27. . Further, the vertical cylinder 7 is extended by an operating device (not shown). The winch case 6 rises while being guided by the guide means 10 described above.

A pair of upper and lower boss members 14 and 15 protruding to the left and right of the swivel rear portion 1a and a pair of upper and lower boss members 16 and 17 protruding to the left and right of the front end 6a of the winch case 6 are formed. When they match, the winch case 6 is connected to the rear end 1a of the swivel table by driving the connecting pin 18 by the drive cylinder 19 of the winch connecting device 4 and passing the connecting pin 18 through both bosses. FIG. 3 shows the state at that time.

Next, the rod of the vertical cylinder 7 is rotated 90 degrees by the rod rotating device 27. When the rod of the vertical cylinder 7 is contracted, the upper surface of the tip fitting 25 engages with the jaw 28 of the hole 22 of the counterweight 9, so that the counterweight 9 is pulled upward. Round bar 32 and counterweight 9 projecting from the side of winch case 6
The counterweight 9 is mounted on the lower part of the winch case 6 with the support member 31 on the upper surface engaged and positioned. FIG. 4 shows the state at that time.

As described above, the winch case 6 can be attached to the rear portion of the swivel base without using a separate crane. Further, in the winch attachment / detachment device of the present invention, the counterweight can be attached without requiring any other crane or device.

To remove the counterweight 9 and the winch case 6, the above steps may be performed in reverse.

In the above embodiment, the winch case 6 and the counterweight 9 are integrally transported, and both are mounted on the rear end of the swivel base. However, the present invention can be carried out only with the winch case 6 alone. Of course there is. FIG. 5 shows the state in that case. Numeral 34 denotes a winch case transport jig, which comprises a table 35 and a support member 33 which are constituent members of the counterweight 9 described above.
Is taken out and configured integrally.
In this embodiment, the winch case 6 is transported integrally with the winch case transport jig 34. When the winch case 6 is mounted on the swivel table 1, the winch case 6 is integrally mounted on the frame 12 of the vehicle. The roller 20 is placed so as to be in contact with the guide surface 21 at the rear end 1a of the turntable.

The subsequent mounting is the same as when the counterweight 9 is provided. After the winch case 6 is mounted on the swivel base 1, there is no counterweight, so that the vertical cylinder 7 reduces only its rod.

[0026]

As described above, the winch mounting apparatus for a mobile crane according to the present invention does not require a separate crane for attaching and detaching a winch.
In addition, the work of attachment and detachment can be performed only by operating the vertical cylinder and the winch connecting device attached to the winch case, so that the workability is excellent and safe.

Further, when the winch case is raised by the vertical cylinder, the guide means disposed between the rear end of the swivel base and the winch case guides the winch case along the rear end of the swivel base, and the winch case is accurately positioned. Is moved to the connection position of the rear end of the swivel base, so that the operation of aligning the winch case with the rear end of the swivel base can be performed easily and quickly.

In a state in which the winch case is connected to the rear end of the turntable, the counterweight placed on the frame of the vehicle is pulled up by using the vertical cylinder, so that the counter is placed below the winch case. Weights are attached, and the vertical cylinder has two functions: attaching and detaching the winch case and attaching and detaching the counterweight. Therefore, the entire attaching / detaching device can be made compact.

Furthermore, since the main part of the attachment / detachment device is almost disposed on the winch case side, the weight of the swivel side during traveling with the winch case removed can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a winch attaching / detaching device according to the present invention.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is an explanatory view showing a state where a winch case is raised by extending a vertical cylinder.

FIG. 4 is an explanatory view of a state in which a vertical cylinder is reduced and a counterweight is raised.

FIG. 5 is an explanatory view of attaching and detaching only a winch case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Swivel base 2 Main winch 4 Winch connection device 5 Sub winch 6 Winch case 7 Vertical cylinder 8 Counter weight engaging / disengaging means 9 Counter weight 10 Guide means 11 Winch attaching / detaching device 12 Vehicle frame 13 Winch drum 15 Hydraulic motor 14, 15, 16 , 17 Boss member 18 Connecting pin 19 Driving cylinder 20 Roller 21 Guide surface 22 Hole 23 Reduction gear 25 Tip fitting 26 Hole on counterweight upper surface 27 Rod rotating device 28 Jaws to be engaged 30 Mounting table 31 Support member 32 Bar member 33 Support member 34 Transfer jig 35 Stand

Claims (3)

[Claims] A swivel table which is rotatably mounted on a frame of a vehicle and has a telescopic boom which can be raised and lowered; a winch case in which a winch drum, a speed reducer and a hydraulic motor are mounted in a box-shaped case; A winch connecting device disposed between the rear end of the swivel base and the winch case and capable of connecting the winch case to the rear end of the swivel base; and a winch case attached to the winch case and extending and retracting the winch case on the vehicle frame. And a vertical cylinder for vertically moving between the swing table and the rear end of the swivel table. 2. The mobile crane according to claim 1, further comprising guide means disposed between the rear end of the swivel table and the winch case to guide the vertical cylinder to vertically move the winch case. Winch attachment / detachment device. 3. The vehicle frame according to claim 1, wherein the vertical cylinder is attached to the winch case with a rod side facing downward, and has a counterweight engaging / disengaging means at a tip end of the rod. A movable crane winch attachment / detachment, wherein a detachable counterweight is engaged with the counterweight engaging / disengaging means mounted thereon, and the counterweight can be pulled up by reducing the vertical cylinder. apparatus.