JPH07187571A - Crane - Google Patents

Abstract

PURPOSE:To transport a large suspended load even if the work height and the work radius are increased so as to improve the work efficiency. CONSTITUTION:A reaction force member 1 is erected in the ground, and a support member 2 moved up and down by an elevating jack 12 is interposed in the interior of the reaction force member l. The support member 2 is loaded with a crane mechanism 6 having an expansible boom 5. Simultaneously with loading, the reaction force member 1 and the support member 2 are connected to each other to obtain the reaction force at the time of hoisting a load.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane which can be easily loaded and unloaded at a high place by being mounted on a support member which is vertically movably mounted on a reaction member standing upright in the ground.

[0002]

2. Description of the Related Art Conventionally, when carrying a suspended load using a jib crane, a tower crane, etc., the boom length has been adjusted to the maximum height of the object.
Therefore, the equipment was unnecessarily large when working in a low place. Further, in a tower crane, the base may be climbed according to the height of the target object. This climbing work took time because the bases were piled up. In addition, a large space was required when branch lines were set up to stabilize the crane. Further, none of the conventional examples has a structure in which the support column is vertically movable.
Furthermore, when using truck cranes, crawler cranes, etc., balance with the outriggers or balance weights provided for each heavy vehicle, adjust the boom angle, change the working radius, and so on. We are working while keeping a balance.

[0003]

Usually, in a truck crane or the like, the light weight of the lifting load is greatly influenced by the size of the overrigger extension and the boom angle during the lifting work. For example, as shown in FIG. 6, when the boom length L is fixed and the boom angle θ is changed to change the working radius r, the work radius r1 becomes smaller (the boom angle θ becomes larger) and the load W becomes larger. It is possible to lift the load W1.

FIG. 5 shows a case where a conventional truck crane equipped with an outrigger is used to carry a suspended load, and when the suspended load is transported to a working height H at a working radius r, the tip of the boom 5 is moved. It is assumed that a load having a load W can be transported to the hanging metal fitting.

However, when carrying out the unloading work at the working height H1, it takes time and labor to move the truck crane installed at the work site each time according to the unloading height. Therefore, even when unloading to the working height H, the boom 5 is extended by the height h at the position where the truck crane is installed and the work is performed. In this way, when the boom 5 is extended and the work is performed, only the lifting load W1 smaller than the lifting load W of the working height H can be transported in view of the balance with the truck crane.

For this reason, the unloading work to the working height H1 requires a working time, and in order to increase the lifting load, a heavy truck crane must be used, or the outrigger extension length must be increased. There was a problem that it was greatly affected by the size. In addition, jib cranes and tower cranes have a problem that they require excessive equipment because they are set to work conditions at the maximum. The present invention is
It is an object of the present invention to solve the above problems and provide a crane that can efficiently and smoothly carry out unloading work to high places.

[0007]

In order to achieve the above-mentioned object, the invention of claim 1 is characterized in that a support member is internally mounted on a reaction member standing upright in the ground so as to be vertically movable. Two
The invention according to claim 3 is characterized in that a supporting member is installed inside a reaction member standing upright in the ground so as to be vertically movable by a rope member. The invention according to claim 3 is characterized in that the reaction member standing upright in the ground. It is characterized in that a supporting member is internally installed so as to be vertically movable by a lifting jack.

[0008]

[Function] The support member is installed inside the reaction member erected in the ground. This support member can be moved up and down by an elevating mechanism, and the reaction force member and the support member are connected. By this connection, a reaction force can be obtained from the reaction force member when the load is hoisted and transported, and the load can be stably transported even with a large suspension load. Therefore, even when the lifting height position of the load is changed, it is only necessary to move the support member up and down without changing the boom length, and work efficiency is good.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. The reaction force member 1 is erected in the ground, and the support member 2 is installed in the reaction force member 1 so as to be vertically movable. The reaction member 1 may be inserted into the ground by an existing press-fitting or burying method, and the reaction member used may have any shape such as a circle, an ellipse, a square, a rectangle, and a triangle. On the support member 2, a crane mechanism 6 including a swivel unit 3, a driver's cab 4, a retractable boom 5 and a winding device (not shown) for operating a hanging metal fitting at the boom tip is rotatably mounted. .

The elevating jack 12 shown in FIG. 1 is an embodiment of a vertical movement mechanism for the support member 2, and is provided between the bottom surface of the reaction member 1 standing upright in the ground and the lower end of the support member 2. A lifting jack 12 is provided. The supporting member 2 can be moved up and down by operating the lifting jack 12. Further, a lock mechanism 1 for locking the support member 2 at a predetermined height.
0 is provided with an appropriate number of locking jacks 13 at an appropriate position above the reaction member 1, for example, at the inner periphery. The locking jack 13 is operated so that the tip of the locking jack 13 presses the outer peripheral surface of the support member 2 to lock the support member 2 at a predetermined height position.

FIGS. 2 and 3 show another embodiment of the vertical movement mechanism of the support member 2, in which a rope such as a wire rope or a chain is attached to the inner circumference of the upper part of the reaction member 1 slightly protruding from the ground. An attachment portion 8 such as a pulley for tensioning the strip member 7 is provided. Then, the tip end of the cord member 7 is attached to one of the opposing attachment portions 8 attached to the inner periphery of the upper portion of the reaction member 1, and the middle portion thereof is stretched to the attachment portion 8 at the lower end of the support member 2, and the end portion It is attached to a winding device (not shown) which is stretched on the other attachment portion 8 and installed on the ground. By this winding device, the cord member 7
It is possible to raise or lower the crane mechanism 6 by moving the support member 2 up and down in the reaction force member 1 by winding or rewinding.

A plurality of lock holes 9 are provided in the longitudinal direction of the outer periphery of the support member 2. The lock pin 1 provided in the lock mechanism 14 provided above the reaction member 1 in the lock hole 9
By locking 1 the support member 2 can be locked at a predetermined height position and at the same time the reaction member 1 and the support member 2 can be connected. As the lock mechanism, a lock jack other than the lock pin 11 described above may be used, and a known method may be used. It is also possible to obtain the same locking function by using the rope member 7 and the lifting jack 12 without specially providing the locking mechanism.

Next, the operation of the above embodiment will be described.
As shown in FIG. 4, a crane mechanism 6 is mounted on a support member 2 that is vertically movably installed in a reaction force member 1 that is erected in the ground. Work height H on the circumference of work radius r by extending boom 5
The load is hoisted at the tip of the boom 5 and transported. At this time, the support member 2 on which the crane mechanism 6 is mounted is locked by the lock mechanisms 10 and 14 of the reaction force member 1 including the lock pin 11 or the locking jack 13 and the like.
Since it is connected to the reaction force member 1, the reaction force at the time of lifting the suspension load W can be obtained by the reaction force member 1 erected in the ground, so that it can be transported smoothly.

Next, the working height H1 higher than the working height H1
Will be described. In this case, with the boom length L1 at the time of unloading to the working height H, the rope member 7 is wound up or the lifting jack 12 is operated to raise the height of the support member 2 on which the crane mechanism 6 is mounted. Move up by h minutes.

Then, in order to maintain the working height H1, the support member 2 is locked by the lock mechanisms 10 and 14 of the reaction member 1. In this way, the boom 5 can carry the same lifting load as at the low working height H simply by moving in parallel without changing the extended length L1. in this way,
When the rope member 7 or the lifting jack 12 is used, the working height can be increased without changing the boom length and the boom angle while the load is suspended. Sufficient reaction force can be obtained and efficient lifting work is possible without reduction of hanging load.

Further, even when the working radius is large (the boom angle is small), a large reaction force can be obtained by the reaction force member erected in the ground, so that a large suspension load can be smoothly transported. it can. It can also be applied to tower cranes, jib cranes, and other cranes that do not have boom length expansion and contraction.

[0017]

As described above, according to the present invention, since a supporting member is installed in a reaction member standing upright in the ground so as to be vertically movable and a crane mechanism is mounted on this supporting member, a large reaction force can be obtained in a narrow place. It is possible to adjust the required height by extending the support member even when working at a high place, and it is possible to carry a large load, resulting in good work efficiency.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of an embodiment of the present invention.

FIG. 2 is a partial vertical sectional side view of another embodiment of the present invention.

FIG. 3 is a plan view showing a lock mechanism according to another embodiment of the present invention.

FIG. 4 is an explanatory view of the operation of this embodiment.

FIG. 5 is an explanatory view of the operation of the conventional example.

FIG. 6 is an explanatory diagram of a suspension load.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reaction force member 2 Support member 3 Swivel base 4 Driver's cab 5 Boom 6 Crane mechanism 7 Rope member 8 Mounting part 9 Lock hole 10, 14 Lock mechanism 11 Lock pin 12 Lifting jack 13 Locking jack L, L1 Boom length r Working radius W, W1 Lifting load

Claims (3)

[Claims] 1. A crane characterized in that a support member is installed inside a reaction force member erected in the ground so as to be vertically movable. 2. A crane characterized in that a supporting member is internally mounted in a reaction member erected in the ground so as to be vertically movable by a rope member. 3. A crane characterized in that a supporting member is internally mounted in a reaction member standing upright in the ground so as to be vertically movable by a lifting jack.