JPH1036080A - Derricking gear of latticed boom crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a derricking gear which enhances the safety and maintainability of a crane to allow an operator to do operations safely. SOLUTION: This derricking gear comprises an L-shaped mast 12 consisting of a bottom 12a and another side 12b at a certain angle to the bottom, with a pendant rope 14 attached to the end of the side 12b, X-shaped links consisting of first and second links 5, 6 each of which is pivotally supported at its upper end against the bottom 12a of the mast 12 by a pin shaft and at its lower end against the upper main frame 2 of a crane by a pin shaft, and an elevating cylinder 7 having its rod end pivotally supported against the bottom 12a of the mast 12 by a pin shaft and having its cylinder lower end pivotally supported against the upper main frame 2 by a pin shaft; the elevating cylinder 7 is located away from a boom 3 relative to the X-shaped links, the rod end of the elevating cylinder 7 and the apex of the first link 5 are pivotally supported by the same pin shaft 11, and the lower end of the first link 5, the pin shaft 8, and the pin shaft 10 at the lower end of the elevating cylinder 7 are mounted at a distance L to one another. With the small stroke of the elevating cylinder 7, a sufficient stroke can be obtained to raise the boom 3 from a position on the ground to a position where it is at a maximum operating angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to an undulating device. In particular, the present invention relates to an apparatus for raising and lowering a lattice mukulein with improved safety and maintainability.

[0002]

2. Description of the Related Art Raising and lowering devices of lattice crane are obtained by winding and unwinding a rope with a hoisting device.
Raising and lowering the boom. In FIG. 1, 1 is a lower traveling body, and 2 is an upper main frame. A boom 3 is mounted on the upper main frame 2 by a pin shaft 4. A pendant loop 14 is attached to a tip portion of the boom 3 by a pin shaft 15, and the boom 3 can be raised by pulling it. In the conventional method, a bridle (not shown) is attached to the pendant loop 14, and a plurality of sheaves in the bridle and a sheave in a bail attached to the upper main frame 2 side. The rope has been wound around a plurality of times, and the lifting operation of the boom 3 has been performed by winding the rope. Such a device has a risk of being cut if the rope is damaged, and its inspection is extremely important for safety, and is a heavy burden for maintenance managers and drivers. In addition, since detailed inspection is not easy, it is necessary to replace the battery after a certain period of use, which is problematic in terms of cost. In addition, when winding in the hoisting apparatus, care must be taken not to cause turbulence, and this is a burden on the driver.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an undulating device that improves safety and maintainability and enables a driver to work with peace of mind.

[0004]

[Means for Solving the Problems]

(1) The base 12a and the other side 12 forming an angle with the base
b, an L-shaped mast 12 having a pendant loop 14 attached to the tip of the other side 12b, and a mast 12 at the upper end.
An X-shaped link consisting of a first link 5 and a second link 6 pivotally supported by a bottom axis 12a and a pin axis, and a lower end of the upper main frame 2 of the crane and a pin axis, respectively;
The up-and-down cylinder 7 is pivotally supported at the bottom end 12a of the upper main frame 2 and the lower end of the cylinder is pivotally supported at the upper main frame 2 by a pin shaft. The up-and-down cylinder 7 is separated from the boom 3 with respect to the X-shaped link. And the rod end of the up-and-down cylinder 7 and the top of the first link 5 are pivoted by the same pin shaft 11 or the pin shaft 11 'near the top of the first link 5. Support, pin shaft 8 at the lower end of first link 5
And the pin shaft 10 at the lower end of the undulating cylinder 7 were attached at a distance L.

(2) The undulating cylinder 7 in the above (1)
The rod end of the up / down cylinder 7 is pivotally supported by the same pin shaft 13 as the top of the second link 6 or a pin shaft 13 'near the top of the second link 6, instead of the upper / lower pivot structure. 7 and the pin shaft 9 at the lower end of the second link 6 were attached with a distance L therebetween.

(3) An L-shaped mast 12 having a bottom side 12a and another side 12b forming an angle with the bottom side and having a pendant loop 14 attached to the tip of the other side 12b, and an upper end of the mast 12 Bottom side 12a and pin shaft
An X-shaped link composed of a first link 5 and a second link 6 pivotally supported by a pin shaft on the upper main frame 2, a rod end on the bottom 12a of the mast 12, and a cylinder on the upper main frame 2; The lower end is composed of an up-and-down cylinder 7 pivotally supported by a pin shaft, and the rod end of the up-and-down cylinder 7 is near the top of the same pin shaft 11 or the top of the first link 5 as the upper end of the first link 5 constituting the X-shaped link. And the lower end of the undulating cylinder 7 is connected to the second link 6.
Pivoted on the same pin shaft 9 as the lower end.

(4) The undulating cylinder 7 in the above (3)
In place of the upper and lower pivot structures, the rod end of the undulating cylinder 7 is pivotally supported by the same pin shaft 13 as the upper end of the second link 6 or the pin shaft 13 ′ near the top of the second link 6. The lower end of the undulating cylinder 7 is pivotally supported by the same pin shaft 8 as the lower end of the first link 5.

(5) The undulating cylinder 7 in the above (1)
Instead of the pivot structure of the rod end, the rod end of the up-and-down cylinder 7 is placed on the bottom side 12a of the L-shaped mast near the top pivot point of the first link 5 or near the top pivot point of the second link 6. ′, The pin shaft 8 at the lower end of the first link 5 or the pin shaft 9 at the lower end of the second link 6 and the pin shaft 10 at the lower end of the undulating cylinder 7 were attached at a distance m.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a lower traveling body, 2 denotes an upper main frame, 3 denotes a boom, and 14 denotes a pendant loop. A base end of the boom 3 is supported by a pin shaft 4 on the upper main frame 2. A first link 5 has a pin shaft 8 at the lower end thereof, which is supported by the upper main frame 2. The first link 5 and the second link 6 have an X shape when viewed from the side. The lower end of the second link 6 is bulged from the pin shaft 8.
On the side remote from the frame 3, the upper main frame 2 is
It is pivoted on. Reference numeral 7 denotes an undulating cylinder, the lower end of which is pivotally supported on the upper main frame 2 by a pin shaft 10. The lower end of the first link 5 and the second link 6 further extends the boom 3.
Is pivoted away from The upper end of the first link 5 and the rod end of the undulating cylinder 7 are pivotally supported by a common pin shaft 11 on the bottom 12a of an L-shaped mast 12. Since the first link 5 and the second link 6 have an X shape, the upper end of the second link 6 is pivotally supported by the pin shaft 13 on the side near the boom 3 on the bottom side 12a of the L-shaped mast 12. ing. The tip of the other side 12b of the L-shaped mast 12 and the tip of the boom 3 are connected by a pendant loop 14, whereby the boot
Supporting the weight of the drum 3 and the hanging load at the tip. Although the same applies to the following example, the up-and-down cylinder 7, the first link 5, the second link 6, and the mast 12 are provided as a left and right pair as viewed from the front and rear of the crane. The shaft 11 and the pin shaft 13 are connected.

The undulating cylinder 7 expands and contracts by hydraulic pressure,
This generates thrust. For example, when the undulating cylinder 7 is contracted in FIG. 1, the first link 5 rotates counterclockwise about the pin shaft 8. At the same time, the L-shaped mast 12 rotates counterclockwise about the pin shaft 13 due to the presence of the second link 6. That is, the mast 12 gradually rises to the left. In this manner, the stroke at the end of the mast 12 can be increased, and the boom 3 can obtain a sufficient stroke to be raised and lowered from the state where the mast 12 is left on the ground to the state of the maximum working angle.

In summary, the crane undulation device described above is provided with an L-shaped mast 12 and the bottom 1 of the L-shaped mast.
2a, the first link 5 and the second link 6 are crossed in an X shape, and the tops of these links are pivotally supported by pin shafts 11 and 13; left
The undulating cylinder 7 is disposed on the side (away from the boom 3), and the rod end of the undulating cylinder 7 and the top of the first link 5 are pivotally supported by the same pin shaft 11. Characterized in that a pin shaft 10 pivotally supporting the main frame 2 and a pin shaft 8 pivotally supporting the first link 5 to the upper main frame 2 are separated by a distance L, and so on. However, the embodiment having the same operation and effect as the crane hoisting device of FIG. 1 is shown in FIGS.
(c) and FIGS. 2 (d) to (g).

In the case of FIG. 2A, the rod end of the up-and-down cylinder 7 is moved to an intermediate position near the upper end of the first link 5 by the pin shaft 1.
I pivoted at 1 '. In this case, when the rod of the up / down cylinder 7 is contracted, the second link 6 rotates to the left with the upper pin shaft 11 of the first link 5 as a fulcrum, and rises. Then, the L-shaped mast 12 rotates counterclockwise through the upper end pin shaft 13 of the second link 6 and pulls the pendant loop 14.

In the case of FIG. 2B, the rod end of the undulating cylinder 7 and the upper end of the second link 6 are pivotally supported by the same pin shaft 13. The upper end of the first link 5 is pivotally supported by a pin shaft 11 on the bottom side 12a of the L-shaped mast 12. The pin shaft 10 at the lower end of the undulating cylinder 7 and the pin shaft 9 at the lower end of the second link 6 are separated by a distance L. With this mechanism,
When the rod of the up / down cylinder 7 is contracted, the mast 12
Rotates counterclockwise around the pin shaft 11 and the pendant loop 1
Pull 4

In the case of FIG. 2C, the rod end of the undulating cylinder 7 is moved to the intermediate position near the upper end of the second link 6 by the pin shaft 1.
I pivoted at 3 '. In this case, when the rod of the up / down cylinder 7 is contracted, the upper end of the second link 6 rotates counterclockwise, and the L-shaped mast 12 rotates counterclockwise about the pin shaft 11 to pull the pendant loop 14.

2 (d) to 2 (g) show that the undulating cylinder 7 is
This is an example in which the first link 5 and the second link 6 that cross each other are arranged on the right side. That is, in FIG. 2D, the positional relationship between the first link 5, the second link 6, and the L-shaped mast 12 is the same as the above example. However, the undulating cylinder 7 is reversed from the above example. That is, the undulating cylinder 7 is the first link 5
At a distance L from the upper main frame 2, the upper main frame 2 is attached to a position close to the boom 3 by a pin shaft 10, and the rod end is pivotally supported by the same pin shaft 11 as the first link 5. When the up-and-down cylinder 7 is extended, the L-shaped mast 12 rotates about the pin shaft 13 to the left in the drawing and pulls the pendant loop 14.

In the case of FIG. 2E, the rod of the undulating cylinder 7 is pivotally supported by a pin shaft 11 'at an intermediate position near the top of the first link 5. When the up-and-down cylinder 7 is extended, the L-shaped mast 12 rotates counterclockwise about the pin shaft 13 and the pendant
The pull 14 is pulled.

In the case of FIG. 2F, the rod end of the undulating cylinder 7 is pivotally supported by the same pin shaft 13 as the upper end of the second link 6. When the undulating cylinder 7 is extended, the L-shaped mast 12
Rotates counterclockwise around the pin shaft 11 and the pendant loop 14
Pull.

In the case of FIG. 2 (g), the rod end of the up / down cylinder 7 is pivotally supported at an intermediate position of the second link 6 by a pin shaft 13 '. When the undulating cylinder 7 is extended, the L-shaped mast 12
Rotates counterclockwise around the pin shaft 11 and the pendant loop 14
Pull.

FIGS. 3 (a) to 3 (d) show a comparison with the above embodiment.
This is an example in which the undulating cylinder 7 is pivotally supported on the upper main frame 2 side by the same pin shaft as the lower end of the first link 5 or the second link 6. First, FIG. 3A is the same as the first embodiment in that the first link 5 and the second link 6 form an X shape and are attached between the L-shaped mast 12 and the upper main frame 2. In this case, the lower end of the undulating cylinder 7 is supported by the same pin shaft 9 as the lower end of the second link 6. The rod end of the up-and-down cylinder 7 is pivotally supported at the bottom 12 a of the L-shaped mast 12 by the same pin shaft 11 as the upper end of the first link 5.
Therefore, when the up-and-down cylinder 7 contracts, the L-shaped mast rotates counterclockwise about the pin shaft 13 above the second link 6 and pulls the pendant loop 14.

FIG. 3B shows that the lower end of the undulating cylinder 7 and the lower end of the second link 6 are pivotally supported by the same pin shaft 9. The rod end of the undulating cylinder 7 is pivotally supported by a pin shaft 11 ′ at an intermediate position near the upper end of the first link 5. Raised cylinder 7
When the lever is retracted, the L-shaped mast 12 rotates counterclockwise about the pin shaft 13 and pulls the pendant loop 14.

In the case of FIG. 3C, the lower portion of the up-and-down cylinder 7 and the lower end of the first link 5 are pivotally supported by the same pin shaft 8. The rod end of the undulating cylinder 7 is pivotally supported by the same pin shaft 13 as the upper end of the second link 6. Raised cylinder 7
Is extended, the L-shaped mast 12 rotates counterclockwise around the top of the first link 5 and pulls the pendant loop 14.

FIG. 3D shows that the rod end of the up-and-down cylinder 7 is pivotally supported at an intermediate position of the second link 6 by a pin shaft 13 '. When the up-and-down cylinder 7 is extended, the L-shaped mast 12 rotates counterclockwise about the pin shaft 11 and pulls the pendant loop 14.

In FIGS. 4A to 4D, the first link 5
The point that the second link 6 and the second link 6 intersect in an X-shape is exactly the same as in the previous embodiment. The different point is that the rod end of the undulating cylinder 7 is pivotally supported at a position different from the upper ends of the first and second links on the bottom side 12a of the L-shaped mast 12.

In FIG. 4 (a), the rod end of the undulating cylinder 7 is a pin shaft 7 ', which is near the outside of the pin shaft 11 of the first link 5 on the bottom 12a of the L-shaped mast 12 (not shown, but also near the inside). Good). The lower end of the undulating cylinder 7 and the lower end of the first link 5 are attached at a distance m. When the undulating cylinder 7 contracts, the L-shaped mast 1
Reference numeral 2 denotes a counterclockwise rotation about the pin shaft 13 and a pendant loop 1
Pull 4

In FIG. 4 (b), the rod end of the undulating cylinder 7 is located near the outside of the pin shaft 13 of the second link 6 on the bottom 12a of the L-shaped mast 12 (not shown, but may be near the inside). ′. The lower end of the undulating cylinder 7 and the lower end of the first link 5 are attached at a distance m. When the undulating cylinder 7 contracts, the L-shaped mast 12 rotates counterclockwise about the pin shaft 11 and pulls the pendant loop 14.

In the case of FIG. 4 (c), the undulating cylinder 7 is pivotally connected to a portion of the upper main frame 2 close to the boom 3 by a pin shaft 9 at a distance m from the lower end of the first link. Supported. And the rod end is the bottom side 12a of the L-shaped mast 12.
The upper first link 5 is pivotally supported by a pin shaft 7 'in the vicinity of the outside of the pin shaft 11 (not shown but may be in the vicinity of the inside).
When the undulating cylinder 7 is extended, the L-shaped mast 12 is moved to the pin shaft 1.
The pendant loop 14 is pulled by rotating counterclockwise around the center 3.

In the case of FIG. 4D, the undulating cylinder 7 is pivotally supported at a position closer to the beam 3 than the first link 5 at a distance m from the lower end of the second link, and the rod end is L-shaped. The second link 6 on the bottom 12a of the mast 12 is pivotally supported by a pin shaft 7 'in the vicinity of the outside of the pin shaft 13 (not shown but may be in the vicinity of the inside). When the up-and-down cylinder 7 is extended, the L-shaped mast 12 rotates counterclockwise about the pin shaft 11 and the pendant
The pull 14 is pulled.

[0028]

The pendant loop 14 is connected to the upper main frame 2 via the first link 5 and the second link 6 forming an X shape and the L-shaped mast 12 supported by the undulating cylinder 7. As described above, a roll for raising and lowering and a drum for winding the same are not required, and the apparatus can be simplified. Further, since the undulating rope is eliminated, the inspection of the rope is not required, and the labor of the operator can be simplified. Even with a small stroke of the undulating cylinder 7, the stroke at the tip of the L-shaped mast 12 can be increased through the first link 5 and the second link 6 which form an X shape. A stroke sufficient to raise and lower the vehicle from the state where it is left on the ground to the state of the maximum working angle can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a side view of a main part of another seven embodiments.

FIG. 3 is a side view of a main part of another four embodiments.

FIG. 4 is a side view of main parts of still another four embodiments.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper main frame 3 Boom 4 Pin axis 5 First link 6 Second link 7 Undulating cylinder 8, 9, 10, 11 Pin axis 12 Mast 13 Pin axis 14 Pendant loop 15 Pin axis

Claims (5)

[Claims] An L-shaped mast (1) comprising a base (12a) and another side (12b) forming an angle with the base, and having a pendant loop (14) attached to the tip of the other side (12b). 12), a first link (5) pivotally supported by the upper end of the mast (12) and the pin shaft, and a lower end by the upper main frame (2) of the crane and the pin shaft. An X-shaped link comprising a second link (6); and an up-and-down cylinder having a rod end pivotally supported on the bottom (12a) of the mast (12) and a cylinder lower end pivotally supported on the upper main frame (2) by a pin shaft. (7), wherein the undulating cylinder (7) is located on the side remote from the boom (3) or on the side close to the boom (3) with respect to the X-shaped link, and The same pin shaft (11) connects the rod end of
Alternatively, a pin shaft (11 ') near the top of the first link (5) pivots, and the pin shaft (8) at the lower end of the first link (5) and the up / down cylinder
(7) A raising and lowering device for lattice crane, wherein the lower end is attached to a pin shaft (10) at a distance L. 2. The pin shaft (13) which is the same as the top end of the second link (6), instead of the pivot structure of the upper and lower ends of the up / down cylinder (7) according to claim 1. Or, it is pivotally supported by a pin shaft (13 ') near the top of the second link (6), and is connected to the lower pin shaft (10) of the undulating cylinder (7) and the lower pin shaft (9) of the second link (6). Is mounted at a distance of L
Undulation device. 3. An L-shaped mast having a base (12a) and another side (12b) forming an angle with the base, and having a pendant loop (14) attached to a tip of the other side (12b). 12) and a first link (5) pivotally supported at its upper end by the bottom axis (12a) of the mast (12) and the pin axis, and at its lower end by the pin axis to the upper main frame (2) of the crane. An X-shaped link comprising a second link (6), a rod end at the bottom side (12a) of the mast (12), and an up-and-down cylinder (7) pivotally supported at the lower end of the cylinder on the upper main frame (2) by a pin shaft. ), The rod end of the undulating cylinder (7) being the same pin shaft (11) as the upper end of the first link (5) constituting the X-shaped link or the pin shaft near the top of the first link (5). (11 ') and the lower end of the lattice cylinder (7) pivotally supported by the same pin shaft (9) as the lower end of the second link (6). Dress Place. 4. A pin shaft (13) having the same rod shaft as the upper end of the second link (6), instead of the pivotal structure of the upper and lower ends of the hoisting cylinder (7) according to claim 3. Or, while pivotally supported by a pin shaft (13 ') near the top of the second link (6), the lower end of the undulating cylinder (7) is pivotally supported by the same pin shaft (8) as the lower end of the first link (5). Lattice mucklein undulating device. 5. An alternative to the pivotal structure of the rod end of the undulating cylinder (7) according to claim 1, wherein the rod end of the undulating cylinder (7) is connected to the first link (5) on the bottom side (12a) of the L-shaped mast. ) Near the top pivot point of the second link (6) or near the top pivot point of the second link (6) by the pin shaft (7 '), and the pin shaft at the lower end of the first link (5).
(8) Or a lattice crane hoisting device in which a pin shaft (9) at the lower end of the second link (6) and a pin shaft (10) at the lower end of the hoisting cylinder (7) are mounted at a distance of m.