JPH1029791A - Housing method for extensible tower crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To house an extensible type tower crane even in a deep working site with a restricted clearance. SOLUTION: An extensible tower boom 40 is shrunk while the extensible tower boom 40 and a tower jib 50 are raised, and after the extensible tower boom 40 is shrunk, the tower jib 50 is put down while being bent, so that the tower jib 50 and the extensible tower boom 40 are bound together, and the at the same time, the mutually opposed positions in the bent tower jib 50 are bound together. Subsequently, the extensible tower boom 40 is put down, and a housing operation is finished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable tower crane provided with a telescopic tower boom and a tower jib movably mounted at the tip thereof.

[0002]

2. Description of the Related Art An example of a conventional tower crane is shown in FIGS.
This will be described with reference to FIG. A tower boom 140 is attached to the front of the crane body 101 so as to be able to move up and down. A tower jib 150 is attached to the front side of the top of the tower boom 140, and a swing lever 110 is attached to the rear side to be swingable. I have. On the crane main body 101, a tower hoisting winch 121 for raising and lowering a tower boom 140 by winding or unwinding a tower hoisting rope 132, and a jib hoisting for raising and lowering a tower jib 150 by winding or unwinding a jib hoisting rope 108. A winch 137 is provided.

In such a tower crane, when the crane is moved, stopped, or assembled, the hoisting rope 132 is extended by the jib hoisting winch 137 to fold the tower jib 150, and as shown in FIG. The tower jib 150 is connected.
Thereafter, as shown in FIG.
, The tower hoisting rope 132 is extended to lower the tower boom 140, and the crane is assembled in this state.

Further, in such a tower crane, in order to make the boom size when the tower boom falls down more compact, the distal end boom can be sequentially slidably nested on the proximal end boom of the tower boom. When the tower boom is folded down, the tower boom is contracted to reduce the overall length (for example, Japanese Utility Model Laid-Open No. 63-161292).

[0005]

However, in such a crane in which the tower boom is extendable, the tower jib is connected to the tower boom and then the tower boom is turned down. Therefore, when the tower boom is contracted, the total length of the tower boom is smaller than that of the conventional tower boom, and it is necessary to make the length of the tower jib smaller than that of the tower boom that has been expanded and contracted. For this reason, the length of the tower jib must be smaller than that of the conventional one, and as a result, it is possible to realize compactness when the tower boom is laid down, but to perform deep work at the work site where the height is limited Tower crane work was restricted.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for storing a telescopic tower crane which can be made compact when the tower boom is laid down and which is not restricted in work.

[0007]

FIG. 1 shows an embodiment of the present invention.
Referring to FIG. 11, the present invention provides a lower traveling body, an upper revolving body pivotally attached to the lower traveling body, and a distal boom 4, 5 sequentially inserted into the proximal boom 3. A telescoping tower boom 40 slidably inserted into the upper revolving unit and slidably mounted on the upper revolving body; and a tower jib slidably mounted on the tip of the foremost boom 5 of the distal end booms. The tower boom 40 has an overall length greater than the contracted length from the lower surface of the lower traveling structure to the tip of the retractable telescopic tower boom 40 in a state in which the tower boom is raised and contracted, and can be bent to be shorter than the contracted length. The telescopic tower boom 40 is applied to the retractable method of the retractable tower crane having the tower jib 50, and the telescopic tower boom 40 is contracted in a state where the telescopic tower boom 40 and the tower jib 50 are erected, After that, the tower jib 50 is turned down until its tip comes into contact with the ground, the tower jib 50 is further folded, and the base end portion of the turned down tower jib 50 is hung by the contracted telescopic tower boom 40 to be interconnected and bent. The above-mentioned object is achieved by connecting the mutually opposed positions of the tower jib 50 thus connected, and by lowering the telescopic tower boom 40 after the connection.

According to the present invention, the telescopic tower boom 40 is contracted in a state in which the telescopic tower boom 40 and the tower jib 50 are erected, and after the telescopic tower boom 40 is contracted, the tower jib 50 is laid down until its tip is grounded. Then, the tower jib 50 is folded. The base end of the tower jib 50 that has fallen down is embraced by the telescopic tower boom 40 to be connected to each other, and the bent tower jib 50 to be connected to each other at opposing positions. After that, the telescopic tower boom 40 is folded down and the operation is completed.

In the meantime, in the section of the means for solving the above-mentioned problem which explains the constitution of the present invention, the drawings of the embodiments of the present invention are used in order to make the present invention easy to understand. However, the present invention is not limited to this.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a configuration of a tower crane for carrying out a retractable tower crane storage method according to the present invention. As shown in FIG. 1, a lower tower 2 is swingably attached to the front of the crane body 1, and a first connecting boom 3 is fixed to the lower tower 2 by a pin (not shown). A second connecting boom 4 is slidably provided in the first connecting boom 3, and a third connecting boom 5 is slidably provided in the second connecting boom 4. A tower upper boom 27 is fixed to an end of the third connecting boom 5 by a pin (not shown). The jib lower part 15 is located at the front end of the tower upper boom 27.
The first jib joint 28 is attached to the tip of the lower jib 15, and the second jib joint 14 is attached to the tip of the first jib 28 by a pin (not shown). A jib upper part 13 is fixed to a tip of the second jib joint 14 by a pin (not shown). The tower boom 40 is constituted by the tower lower part 2 and the first to third joint booms 3, 4, and 5, and the tower jib 50 is constituted by the jib lower part 15, the first and second jib joints 28 and 14, and the jib upper part 13.

As shown in FIG. 2, which is a partially enlarged view of a state in which the tower jib 50 is laid down, the second jib joint 14 has a pin 29 at the upper left end in FIG.
8 and the lower left end is pin 2
2 makes the first jib joint 28 detachable. The pin 22 is connected to the first jib joint 2 as shown in FIG.
8 is driven by a pin attaching / detaching cylinder 23. The swing lever 10 is swingably attached to the rear end of the tower upper boom 27 by a pin 35.

In FIG. 1, a crane body 1 includes a tower hoisting winch 21 for raising and lowering a tower boom 40,
A jib hoisting winch 37 for raising and lowering the tower jib 50;
A hoisting winch 18 for lifting and lowering a suspended load is attached.

The tip of the upper jib 13 and the swing lever 1
0 is a fixed length first jib pendant rope 11
And a second jib tie 2
8 and one end of the swing lever 10 are connected to each other by a second jib pendant rope 12 having a fixed length. The other end of the swing lever 10 and the bridle 7 having a plurality of sheaves are connected to each other by a jib hoisting pendant rope 9. The jib hoisting rope 8 extended from the jib hoisting winch 37 is stretched around the sheave of the bridle 7 and the jib hoisting hanger 6. The tip of the tower upper boom 27 and the tower up / down bridle 31 having a plurality of sheaves are connected to each other by a tower up / down pendant rope 33. The tower hoisting rope 32 extended from the tower hoisting winch 21 is a bridle 3
1 and the tower hanger 30. Hoisting rope 17 unreeled from hoisting winch 18
A hook 16 is provided at the tip of the.

When the tower hoisting rope 32 is wound around the tower hoisting winch 21, the tower boom 40 is raised, and when the tower hoisting rope 32 is extended, the tower boom 4 is raised.
0 is knocked down and the jib hoisting rope 8 is
When the jib is raised, the tower jib 50 is raised, and when the jib hoisting rope 8 is extended, the tower jib 50 is tilted. When the hoisting rope 17 is unwound from the take-up winch 18, the hook 16 is lowered, and when the hoisting rope 17 is unwound, the hook 16 is raised.

The lower end of the lower tower boom 2 and the lower end of the second connecting boom 4 are located inside the tower telescopic cylinder 1
9 are connected. As shown in FIG. 4, the upper end of the lower tower boom 2 (the lower end of the first connecting boom 3) and the lower end of the third connecting boom 5 are fixedly extended and retracted via sheaves 38A and 38B on the outside thereof. Are connected by a rope 20. When the tower telescopic cylinder 19 is extended, the second connecting boom 4 is moved to the first connecting boom 3.
It slides inside and projects from the first connecting boom 3. At this time, the third connecting boom 5 projects from the first connecting boom 3 together with the second connecting boom 4, but the second connecting boom 4 projects from the first connecting boom 3, so that the tower telescopic rope 20 becomes the second connecting boom 4. Since the third connecting boom 5 is extended outward from the inside of the two connecting booms 4, the third connecting boom 5 is sent upward by the tower extending / retracting rope 20, whereby the third connecting boom 5 projects with respect to the second connecting boom 4.

Conversely, when the extended tower telescopic cylinder 19 is contracted, the second connecting boom 4 becomes the first connecting boom 3.
And is housed in the first connecting boom 3. At this time, the tower extension / retraction rope 20 is fed out from the outside of the second connection boom 4 to the inside by the weight of the third connection boom 5, and the third connection boom 5 is accommodated in the second connection boom 4.

Next, the operation of this embodiment will be described. First, the case where the tower crane is turned down will be described. As shown in FIG. 1, a pin (not shown) fixing the first connecting boom 3, the second connecting boom 4, and the third connecting boom 5 of the tower crane in an upright state is removed. Next, the tower telescopic cylinder 19 is contracted. As a result, the second connecting boom 4 slides inside the first connecting boom 3 and is accommodated in the first connecting boom 3. At this time, the tower extension / retraction rope 20 is fed out from the outside of the second connection boom 4 to the inside by the weight of the third connection boom 5, and the third connection boom 5 is accommodated in the second connection boom 4. At the same time, the tower hoisting rope 32 is taken up by the tower hoisting winch 21 so that the tower hoisting pendant rope 33 is not excessively loosened, and the jib hoisting rope 8 is wound up by the jib hoisting winch 37 to thereby provide a jib hoisting pendant. Make sure that the rope 9 is not too loose.

Then, as shown in FIGS. 5 and 6, the tower boom 40 is sequentially contracted, and when the tower boom 40 reaches a predetermined length shown in FIG. The first to third connecting booms 3, 4, and 5 are fixed by the tower fixing pins.

Next, the jib hoisting rope 8 is paid out from the jib hoisting winch 37, and the distance between the jib hoisting hanger 6 and the jib hoisting bridle 7 is changed.
0 is inclined forward with the pin 35 as the center. Jib bottom 15
Is swingably attached to the tower upper boom 26, and a fixed length first jib pendant rope 11 is attached between the swing lever 10 and the jib upper part 13, so that the tower jib 50 is shown in FIG. Inclining forward. When the tip of the jib upper part 13 touches the ground, the operation of the jib hoisting winch 37 is stopped. Then
The hoisting rope 17 is removed from the hook 16 and the tip of the hoisting rope 17 is fixed to the jib upper part 13. Then, the pin attaching / detaching cylinder 23 attached to the first jib joint 28 is driven to remove the pin 22 from the second jib joint 14. As a result, the second jib connector 14 and the upper jib 1
3 swings around the pin 29 as a fulcrum. At this time, the posture of the first jib joint 28 is held by the second jib pendant rope 12.

Further, when the jib hoisting rope 8 is extended from the jib hoisting winch 37 and the swing lever 10 is further tilted forward, the first jib joint 28 is folded as shown in FIG. Contact with In this state, the first jib joint 28 is fixed to the first joint boom 3 by the attaching portion 24 as shown in FIG.

Next, by winding the hoisting rope 17 by the hoisting winch 18, the second jib joint 14 and the upper jib 13 are folded upward with the pin 29 as a fulcrum as shown in FIG. And the second jib tie 1
4 and the first jib joint 28 are in contact with each other,
The jib joint 28 and the second jib joint 14 are fixed by a mounting part (not shown) that swings the same configuration as the mounting part 24.

Thereafter, the tower hoisting rope 32 is paid out from the tower hoisting winch 21, the distance between the tower hoisting hanger 30 and the tower hoisting bridle 31 is changed, and the contracted tower boom 40 is inclined forward. Then, as shown in FIG. 11, the tower boom 40 is grounded, and the operation is completed.

On the other hand, when the tower is to be erected, the reverse operation is performed in the case where the tower is brought down. First, FIG.
In the state shown in FIG. 1, the tower hoisting rope 32 is wound up by the tower hoisting winch 21 and the tower hoisting hanger 3
The distance between 0 and the tower up / down bridle 31 is changed, and the contracted tower boom 40 is raised rearward. Then, after the contracted tower boom 40 stands up as shown in FIG. 10, the attachment portion is released, and the fixing between the first jib joint 28 and the second jib joint 14 is released. Next, by pulling out the hoisting rope 17 from the hoisting winch 18, the folded second jib tether 14 and the upper jib 13 are extended with the pin 29 as a fulcrum as shown in FIG. 8. Then, in this state, the attachment portion 24 is released to release the fixing between the first jib joint 28 and the first joint boom 13.

Next, the jib hoisting rope 8 is wound up by the jib hoisting winch 37, and the swing lever 10 is tilted rearward.
3 swings around the pin 29 as a fulcrum, resulting in the state shown in FIG. In this state, the pin attaching / detaching cylinder 23 is driven to fix the second jib joint 14 and the first jib joint 28 by the pin 22. Then, the jib undulation winch 3
7. The jib hoisting rope 8 is wound by 7 and the swing lever 10 is tilted backward, so that the first and second
The tower jib 50 is raised and lowered by the jib pendant ropes 11 and 12 as shown in FIG.

Next, the tower fixing pin (not shown) is removed to release the fixing of the first to third connecting booms 3, 4 and 5, and the tower telescopic cylinder 19 is moved while the jib hoisting rope 8 is extended by the jib hoisting winch 37. By the extension, the second connecting boom 4 slides in the first connecting boom 3 and protrudes from the first connecting boom 3. At this time, the third
The tether boom 5 projects from the first tether boom 3 together with the second tether boom 4, but the second tether boom 4 is
By projecting from the connecting boom 3, the tower extending / retracting rope 20 is fed out from the inside of the second connecting boom 4 to the outside, and the third connecting boom 5 is sent upward by the tower extending / retracting rope 20. The three connecting booms 5 protrude with respect to the second connecting boom 4.

Then, after extending the tower telescopic cylinder 19 until the state shown in FIG.
The first to third connecting booms 3, 4, and 5 are fixed by pins (not shown), and the operation of extending the tower boom 40 is completed.

As described above, in the present embodiment, the tower boom 40
Is shrunk and the tower jib 50 is bent, so that the tower crane in which the tower boom 40 is shrunk does not limit the length of the tower jib 50. Therefore, tower boom 4
The crane can be made compact when it falls down to zero, and the length of the tower jib 50 can be sufficiently ensured to cope with work at a deep work site.

In the correspondence between the above embodiment and the claims, the first connecting boom 3 constitutes the proximal end boom, and the second and third connecting booms 4 and 5 constitute the distal end boom.

[0029]

As described above in detail, according to the retractable tower crane storing method of the present invention, the tower boom is contracted when the tower crane is laid down.
In addition, since the tower jib is bent, the length of the tower jib is not limited even in the tower crane in which the tower boom is contracted. Therefore, the crane can be made more compact when the tower boom falls down, and the length of the jib can be sufficiently ensured to cope with work at a deep work site.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a crane in a standing state for carrying out an embodiment of a retractable tower crane storing method according to the present invention.

FIG. 2 is a view showing a connection state between a first jib joint and a second jib joint.

FIG. 3 is a view showing a coupling mechanism between a first jib joint and a second jib joint.

FIG. 4 is a diagram showing a mechanism for extending and retracting the tower boom.

FIG. 5 is a diagram showing a state where the tower boom is slightly contracted.

FIG. 6 is a diagram showing a state in which the tower boom is completely contracted.

FIG. 7 is a diagram showing a state in which the tower jib is lying down.

FIG. 8 is a view showing a state where the tower jib is slightly bent.

FIG. 9 is a diagram showing a connection state between a first jib joint and a first joint boom.

FIG. 10 is a diagram showing a state where a tower jib is stored.

FIG. 11 is a diagram showing a state in which a tower crane is lying down.

FIG. 12 is a diagram showing a state where a conventional tower crane is standing up;

FIG. 13 is a diagram showing a state in which a tower jib of a conventional tower crane is bent.

FIG. 14 is a diagram showing a state in which a conventional tower crane is lying down.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crane main body 2 Tower lower part 3 1st connection boom 4 2nd connection boom 5 3rd connection boom 6 Jib up / down hanger 7 Jib up / down bridle 8 Jib up / down rope 9 Jib up / down pendant rope 10 Swing lever 11 1st Jib pendant rope 12 2nd Jib pendant rope 13 Upper jib 14 Second jib tie 15 Lower jib 16 Hook 17 Hoisting rope 18 Hoisting winch 19 Tower telescopic cylinder 20 Tower telescopic rope 21 Tower hoisting winch 22 Jib fixing pin 23 Pin detachable cylinder 27 Tower upper boom 28 First jib joint 29 Pin 30 Tower hanger 31 Tower up / down bridle 32 Tower up / down rope 33 Tower up / down pendant rope 34 Tower winch for telescopic

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuki Koshigoe, Inventor Taisei Construction Co., Ltd., 1-25-1 Nishi Shinjuku, Shinjuku-ku, Tokyo (72) Sumitomo Morita 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Hitachi Construction Machinery Co., Ltd. Inside the Tsuchiura Plant (72) Inventor Toshimi Sakai 650 Kandamachi, Tsuchiura City, Ibaraki Prefecture Inside the Tsuchiura Plant Hitachi Construction Machinery Co., Ltd. (72) Inventor ▲ Masatoshi Shimajima 2-6-1 Otemachi, Chiyoda-ku, Tokyo No. Ritsu Construction Machinery Co., Ltd. (72) Inventor Toshio Kishi 2-6-2 Otemachi, Chiyoda-ku, Tokyo Japan Ritsuchi Construction Machinery Co., Ltd. (72) Inventor Takao Mamine 3-15 Funabori, Edogawa-ku, Tokyo No. 15 Inside Kitai Manufacturing Co., Ltd.

Claims (1)

[Claims] A lower traveling body, an upper revolving body pivotally mounted on the lower traveling body, and a distal end boom inserted into a base end boom so as to be slidable in a telescopic manner. A telescopic tower boom attached to the body so that it can be raised and lowered, and a tower jib that can be raised and lowered at the tip of the most advanced boom among the distal booms, wherein the telescopic tower boom is in an upright and contracted state. Storage of a telescoping tower crane having a total length greater than the contracted length from the lower surface of the undercarriage to the tip of the telescopic tower boom contracted, and having a tower jib that can be bent to be shorter than the contracted length. The method comprises: retracting the telescopic tower boom with the telescopic tower boom and the tower jib upright; To the ground, further folding the tower jib, holding the base end of the fallen tower jib in the contracted telescopic tower boom and interconnecting them, and opposing the bent tower jib to each other. A method for storing a telescoping tower crane, comprising connecting the positions to each other and, after the connection, lowering the telescopic tower boom.