JPS6032065Y2 - Load balance monitoring device for heavy lifting and unloading equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a load balance monitoring device in a heavy object lifting and unloading device.

[Conventional technology]

For example, when hoisting a large heavy object, when hoisting both ends of the object to be hoisted using an equalizer beam,
Although the left and right sides are averaged and stable, the distance (hanging allowance) between the bottom of the suspended object and the top of the equalizer beam is large, and the height of the building is required accordingly, making it difficult to work in low buildings. Not suitable.

Therefore, when installing a generator, press machine, etc. in a building, due to the height restrictions of the building's roof frame and the position of the hanging ears of the machine, it is necessary to separate both ends of the machine with at least two wrapped wires. In many cases, it is necessary to use a lifting device.

In this case, there is an advantage that the work can be done at a low place in the building, but there is a disadvantage that the tension of each winding wire becomes uneven, making it impossible to perform the work safely.

In order to compensate for this drawback, in the past, for example, a tension meter was attached to each winding wire between the position of the hanging ear and the fulcrum, and the load parallelism was monitored by visually checking the pointer of each tension meter. The use of instruments such as tension meters in this way makes monitoring itself difficult and does not provide good work efficiency.

Further, a heavy object hoisting device as shown in Japanese Utility Model Publication No. 436/1983 has been proposed.

This device connects the unbalanced cargo with a rope to a rectangular suspension frame placed above the unbalanced cargo, and installs two unbalance detectors on the upper surface of the suspension frame in directions orthogonal to each other. Furthermore, the unbalance correction device placed above the hanging frame and the hanging frame are connected by short link chains installed in directions orthogonal to each other, and the central part of each short link chain is rotated by a brake motor. The brake motors are individually driven by the tilt detection signals from the two unbalance detectors, and balance is maintained by moving the short link chain horizontally and longitudinally.

This kind of thing can freely limit the balance of the eccentric cargo, and good results can be obtained for operation by the crane mechanism, but there is a lifting frame, short link chain, unbalanced Although this is effective when a straightening device is involved and the lifting allowance is large and the building ceiling is high, it is extremely unsuitable as a lifting device subject to the height restrictions targeted by this invention, and the structure is complex and the equipment is difficult to use. The problem is that the cost increases.

[Purpose of invention]

The present invention has been developed in response to these circumstances, and uses a simple structure and means to eliminate the drawbacks of the prior art, and allows the amount of movement of a rod horizontally connected between both wires to be adjusted using a guideline. The purpose is to monitor from a remote location using a scale plate, balance the load while correcting the uneven load applied to each winding wire, and safely perform average hoisting and unloading work. .

[Means for solving problems]

The invention for lifting heavy objects solves the problems of the conventional technology.
The load balance monitoring device in the unloading device has its lower end connected to the upper part of the object to be lifted, and passes separately through a fulcrum set above the object to be lifted, or the upper end directly connects to the upper part of the object by a winch or the like. At least two left and right winding wires connected to the hoisting device are provided, and the connecting point of the several-turn winding wire to the object to be lifted and the fulcrum (the hoisting device) are provided.
The same height parts of the above-mentioned both winding wires stretched between the wires are connected to a horizontal wire that is shorter than the distance between the connection points of the several winding wires to the object to be lifted, and that has a downward pointing pointer approximately in the center. The device is comprised of a lifting device connected by a shaped rod, and an indicator scale plate placed approximately in the center of the upper surface of the object to be lifted and adapted to a pointer provided on the rod on the front surface.

〔Example〕

An embodiment of the present invention will be explained with reference to the drawings. Fig. 1 shows the basic configuration of the present invention. Reference numeral 1 denotes an object to be lifted (unloaded), and the upper surface of both ends of the object 1 is left and right. The lower ends of the winding wires 2 and 3 are connected to the sides, respectively, and the other ends of the winding wires 2 and 3 are respectively connected to winches 4 and 5 provided on the ceiling.

Then, the ends of the rods 6, which are shorter than the distance between the connection points a and b of the wound wires 2 and 3 to the object 1 to be lifted, are placed at approximately the same height of the wound wires between the connection points a and b and the winches 4 and 5. A triangle is formed by the line connecting C and d and the winch 4.5, and the wound wires 2 and 3 bent in a dogleg shape.

A downward pointing pointer 7 is provided approximately at the center of the rod 6.

On the other hand, a scale plate 9 having a reference scale 8 on the front surface is placed in the center of the upper surface of the object 1 to be lifted, so that when the tension of the left and right winding wires 2 and 3 is parallel, the rod 6 is The pointer 7 is adapted to the center reference scale 8 of the scale plate 9.

G shown on the object to be lifted 1 indicates the position of the center of gravity, and it is desirable to align the reference scale 8 of the scale plate 9 and the pointer 7 on a vertical line passing through the center of gravity G.

In FIG. 1, when one winch winds up too much and a large tension is generated on the winding wire 3, the balance of tension between the left and right winding wires 2 and 3 is lost, resulting in triangles a, C, and 4 shown by solid lines. Triangle.

d and 5 are deformed as shown by the imaginary line, the connection point C9d moves to the right, and the pointer 7 points to a scale that is off the reference scale 8.

In such a case, by stopping lifting by the winch 5 connected to the winding wire 3 and driving only the other winch 4, a large tension is applied to the winding wire 2, and the triangle shown by the imaginary line is shown by a solid line. until it returns to a triangle.
That is, the other winch 4 is driven until the pointer 7 indicates the reference scale 8, and when both winches are balanced, both winches 4.5 are driven simultaneously to lift or lift the object 1 in a well-balanced manner. It is to be hung and unloaded.

FIG. 2 shows winches 4 and 5 showing the embodiment shown in FIG. 1 above.
An embodiment is shown in which a pulley is used and both winding wires 2 and 3 are connected to a winch (not shown).Since the operation is exactly the same as the embodiment in FIG. 1 described above, a description thereof will be omitted.

FIG. 3 shows other spacings e and f located outwardly from the connection points a and b of the winding wires 2 and 3, respectively, at equal distances of 1 □, and supports 12.f connected thereto. 1
The multiple pulleys 14 and 15 of No. 3 and the multiple pulleys 18 and 19 of a support 16 and 17 suspended from the ceiling of the building are connected to winches (not shown) at the ends of each of the winding wires 2 and 3, respectively. .

Note that the condolences e and f are located at an equal distance of 1° from a vertical line passing through the center of gravity G.

The embodiment shown in FIG. 3 corresponds to a practical device, but its operation is the same as the basic configuration shown in FIG. 1, so a description thereof will be omitted.

FIG. 4 shows details of the scale plate 9, with comparative safety scales 20 on both sides of the reference scale 8, caution scales 21 on both sides, and danger scales 22 on both sides.
are arranged in different colors so that unbalanced loads can be visually observed and immediate countermeasures can be taken.

〔effect〕

Since the present invention is configured as described above, the following effects can be obtained.

(a) By connecting the lower ends of both wound wires to the hanging ears of the object to be lifted, a triangle is formed by the bending of the wound wire at the connecting points a and b and the fulcrum and the bending of the wound wire at the connecting points c and d of the rod. By deforming the above triangle due to the unbalanced tension acting on each winding wire, the rod is moved to the left or right, and the left and right movement of this rod indicates the reference scale of the scale plate. The pointer that was previously used can also be moved, and the unbalanced loads of both winding wires can be moved double from a remote position, and the device is extremely simple.

(b) Only the rod is interposed between the top surface of the object to be hoisted and the fulcrum (or hoisting device), and the lifting allowance is smaller than with conventional technology, making it possible to work in low-rise buildings. suitable for

(e) It is easier and more accurate to detect unbalanced loads using a winch than with conventional instruments such as tension meters that are difficult to confirm double action, and its configuration is simple and easy to use on site. Can be set to

[Brief explanation of drawings]

FIG. 1 is a front view of the device showing the basic type, FIGS. 2 and 3 are front views showing examples of each type, and FIG. 4 is a front view of the scale plate. 1... Object to be lifted (wholesale), 2, 3...
... Wound wire, 4, 5... Winch, 6.
...Rod, 7...Pointer, Death...
Standard scale, 9... Scale plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (a) The lower end is connected to the upper part of the object to be lifted, and each passes through a fulcrum provided above the object to be lifted, or the upper end is directly connected to the upper part of the object, such as a winch, etc. At least two left and right winding wires connected to the hoisting device are provided, and the winding wire is stretched between the connection point of the two winding wires to the object to be hoisted and the fulcrum (the hoisting device). Lifting in which the parts of both wires at the same height are connected by a horizontal rod that is shorter than the distance between the connection points of both wires to the object to be lifted, and that has a downward pointing pointer approximately in the center. (b) Load balance in a heavy object lifting and unloading device, which is comprised of an indicator scale plate that is placed approximately at the center of the upper surface of the object to be lifted and that is compatible with the pointer provided on the rod on the front side. Monitoring equipment.