JPH0616387A - Crane suspension type heavy article reversing device - Google Patents

Abstract

PURPOSE:To secure the versatility of a crane and stabilize suspension by installing a wire for enclosing a heavy article so as to circulation turn by the motor drive, on a reversing body mechanism suspended on a trolley which is travelled in the opposite direction on a balance frame by a direction change mechanism, as to a crane suspension type heavy article reversing device for bridge girders, etc. CONSTITUTION:The wires 41a and 41b of reversing machine bodies 33a and 33b are applied on a heavy article 42, and the hook 46 of a general purpose crane is applied on an engagement piece 2 and suspended, together with a balance frame 1. The heavy article 42 is enclosed and suspended by the wires 41a and 41b. Each motor 35 of the reversing machine bodies 33a and 33b is controlled by a pendant switch 43, and the chains 39a and 39b are circulation- moved, and the heavy article 42 is revolved in air and reversed. During this time, trolleys 5a and 5b are always travelled in the opposite directions similarly by the transmission means of a direction changing mechanism in the gear constitution, and the lateral weight balance is secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for suspending and reversing a heavy object by a crane.

[0002]

2. Description of the Related Art For example, for overturning heavy objects such as large molds, bridge girders, boilers, machine tools, or large-sized raw material containers for painting, welding, assembling, or turning them upside down. The hanging type reversing device is disclosed in, for example, Japanese Patent Publication No. 56-20247 and Japanese Utility Model Publication No. 53-30668.

[0003]

However, in the above-mentioned conventional reversing device, since the structure of the crane itself has to be a unique structure for reversing, the drawback is that the versatility of the crane itself is impaired, and a large heavy load, Alternatively, there is a problem in that a long heavy object cannot be stably hung, and the balance may be lost, resulting in a danger in use.

[0004]

SUMMARY OF THE INVENTION The crane suspension type heavy load reversing device of the present invention is intended to solve the above-mentioned problems, and is a linear balance frame which is hung in a horizontal posture by being hooked on a crane. A pair of trolleys provided on the balance frame so as to run along the longitudinal direction thereof, and a transmission means provided on the balance frame so that the trolleys are connected to each other with a direction changing mechanism interposed therebetween.
It comprises a driving means of the transmission means and a pair of reversing machine main body suspended on each of the trolleys. The reversing machine main body is configured to circulate and rotate by a motor drive a wire that can hang and suspend a heavy object. The transmission means is configured such that the pair of trolleys always travels in the left and right opposite directions on the balance frame by interposing the direction changing mechanism.

[0005]

[Operation] Since the pair of trolleys always run in the opposite directions on the balance frame, the left and right weight balance can be maintained and the interval between the two reversing machines can be varied widely and narrowly. By adjusting it to a large one, it is possible to safely invert even large or long heavy objects. Also, since it can be hung and operated on an ordinary crane, the versatility of the crane is not impaired.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings.
In the figure, reference numeral 1 denotes a linear balance frame composed of an I-shaped beam, and an isosceles triangular engagement piece 2 is fixed to the upper surface of the center portion of the balance frame 1 by welding. 3 is the engaging piece 2
Engagement holes 4 formed in the reference numeral 4 indicate ribs that reinforce the welded portion of the engagement piece 2.

Reference numerals 5a and 5b are a pair of trolleys provided on the balance frame 1 so as to run along the longitudinal direction thereof. The trolleys 5a and 5b are a pair of side plates 6 and 6 so as to sandwich the balance frame 1 from both sides. Are fixed to the trolleys 5a and 5b by means of a connecting shaft 7 at the lower part thereof, and four wheels 8 rotatably supported inside the side plates 6 and 6 roll along the balance frame 1 respectively. Is configured so that it can run horizontally.

Next, the conduction means for connecting the trolleys 5a and 5b will be described. A mounting plate 10 having bearings 9a and 9b is fixed to the center portion of the balance frame 1, and the bearing 9
The rotating shafts 11a and 11b are rotatably supported by a and 9b.
Sprockets 12a and 12b are fixed to 1a and 11b, respectively, and the gear 1 is attached to one end of the rotating shafts 11a and 11b, respectively.
By fixing 3a and 13b and engaging the gears 13a and 13b with each other, the rotating shafts 11a and 11b can rotate only in mutually opposite directions to form a direction changing mechanism.

Further, mounting plates 15a and 15b having bearings 14a and 14b, respectively, are fixed to both ends of the balance frame 1, and rotating shafts 20a and 20b are respectively attached to the bearings 14a and 14b.
Is rotatably supported, and sprockets 16a and 16b are fixed to the rotary shafts 20a and 20b, respectively. Then, one end of the chain 17a is fixed to one side of the trolley 5a with a clasp 18a, and the chain 17a is fixed to the sprocket 16a and the sprocket 1
2a is wound around and turned, and the other end is fastened to the other side of the trolley 5a by a clasp 19a, and one end of the chain 17b is fastened to one side of the trolley 5b by a clasp 18b, and the chain 17b is sprocket. 16b and sprocket 12b
The trolley 5b is fastened to the other side of the trolley 5b with the clasp 19b at the other end.

Next, the driving means of the above-mentioned conduction means will be described.
The drive means shown in this embodiment is of a manual type, and the handle shaft 21 is inserted in the center of the rotary shaft 20b so as to be movable back and forth.
The rotary shaft 20b and the handle shaft 21 can transmit a rotary torque by interposing an axial key (not shown), and the stop plate 22 is provided at one end of the handle shaft 21.
Are fixed by bolts 23, and a coil spring 24 is disposed between the spring stop plate 22 and the outer surface of the one mounting plate 15b in a compressed state, and the elasticity of the coil spring 24 causes the handle shaft 2 to move.
1 is urged in the direction of the arrow, the bolt 25 and the fixing plate 27 are fixed to the outer surface of the other mounting plate 15b, and the three pins 28 are concentrically fixed to the fixing plate 27. At the other end, a handle 29 and a rotating disk 30 are integrally formed with the bolt 3
It is fixed by 1, and the rotating disk 30 is opposed to the fixed plate 27. Incidentally, on the side of the rotary disc 30 facing the fixed plate 27, six fitting holes 32 into which the pins 28 can be loosely fitted are concentrically formed.

Therefore, when the handle 29 is grasped by the hand and pulled toward the front, the handle shaft 21 is pulled against the elasticity of the coil spring 24, and the rotary disc 30 is separated from the fixed plate 27, so that the pin 28 is fitted into the fitting hole 32. Remove more. Therefore, the handle 29 and the handle shaft 21 can be rotated, and when the handle shaft 21 rotates, the sprocket 16b rotates and the chain 1 moves.
Circulate 7b. Therefore, the trolley 5b is run. When the chain 17b circulates, the sprocket 1
2b is driven by the rotation of the gears 13a and 13b.
And is transmitted to the sprocket 12a through the sprocket 12a to circulate the chain 17a. Therefore, the trolley 5a is run in the opposite direction to the trolley 5b. When the pin 28 is fitted into the fitting hole 32 by the elasticity of the coil spring 24 after releasing the hand from the handle 29, the handle 29 and the handle shaft 21 cannot rotate and the trolleys 5a and 5b can be fixedly stopped at that position.

Reference numerals 33a and 33b denote reversing machine bodies suspended from the coupling shafts 7 of the trolleys 5a and 5b via hooks 34 and coupling shafts 40, respectively. The reversing machine bodies 33a and 33b are inside a box body having an open bottom surface. A motor 35, reduction gears 36 and 37, and a sprocket 38 are pivotally supported, and the sprocket 38 can be rotated at a low speed in a required direction by driving the motor 35. Chains 39a and 39b are wound around the sprocket 38, and hooks 47 and 48 are provided at both ends of the chain that hangs downward.
Both ends of the wires 41a and 41b are connected to 7, 48.

Therefore, the heavy load 42 is attached to the reversing machine main body 33.
hooks 46 of a general-purpose crane (not shown) provided in the factory by hooking wires 41a and 41b of a and 33b.
The balance frame 1 by engaging the engaging piece 2 with the reversing machine body 33.
By lifting together with a and 33b, the heavy object 42 can be lifted while being wrapped by the wires 41a and 41b. Then, by operating the pendant switch 43 that controls the rotation of the motor 35 of the two-sided reversing machine body 33a, 33b, the chains 39a, 39b circulate and rotate, and the heavy object 42 held by the wires 41a, 41b is lifted. It can be freely rotated in the air in the state, and it can be inverted, laid down, etc.

Incidentally, 44a and 44b are carts for storing the chains 39a and 39b when the reversing device is not used, and the carts 44a and 44b are provided with four wheels 45 which are respectively oriented in free directions. By placing the reversing machine bodies 33a and 33b on the carriages 44a and 44b,
If the handle 29 is operated in that state, the space between the two reversing machine bodies 33a and 33b becomes free due to the movement of the carriages 44a and 44b, so that the work for adjusting the space between them becomes easy.

In this embodiment, a chain is used as the conductive means. However, other conductive means such as a screw shaft can be used without using such a chain conductive means, and a screw shaft is used. In such a case, the pair of trolleys are respectively screwed into the screw grooves so that the spiral directions are opposite to each other on the left and right sides, and both trolleys are rotated by the rotation of the screw shafts in the same manner as in the above embodiment. It becomes possible to run the same distance in opposite directions. The wires 41a and 41b may have a wider shape according to the shape of the heavy object 42 in addition to the shape shown in the figure, or a belt provided with a protector for preventing damage to the heavy object 42.

[0016]

As described above, the crane-hanging type heavy load reversing device of the present invention is provided so that a pair of trolleys travel in the same manner opposite to each other on a balance frame that is hung in a horizontal posture by a crane. Therefore, the interval can be adjusted according to the shape and size of the heavy object without compromising the left-right weight balance, and the reversing work can be safely performed. Moreover, since it can be hung and operated by an ordinary crane, there is a beneficial effect that the manufacturing cost can be reduced without impairing the versatility of the crane.

[Brief description of drawings]

FIG. 1 is a front view showing a usage state of a crane suspension type heavy load reversing device according to the present invention.

FIG. 2 is a side view showing a usage state of the crane suspension type heavy load reversing device according to the present invention.

FIG. 3 is a front view showing a state in which the crane hanging type heavy load reversing device according to the present invention is not used.

FIG. 4 is an enlarged front view showing the inside of the balance frame.

FIG. 5 is a plan view of the balance frame.

6 is a view taken along the line AA of FIG.

7 is a sectional view taken along line BB of FIG.

FIG. 8 is a sectional view taken along line CC of FIG.

9 is a cross-sectional view taken along the line DD of FIG.

[Explanation of symbols]

 1 Balance frame 2 Engaging piece 5a, 5b Trolley 12a, 12b Sprocket 13a, 13b Gear 16a, 16b Sprocket 29 Handle 33a, 33b Inverter body 35 Motor 38 Sprocket 39a. 39b chain 41a, 41b wire 46 hook

Claims (1)

[Claims] 1. A linear balance frame which is hung in a horizontal posture by being hooked on a crane, a pair of trolleys provided along the longitudinal direction of the balance frame, and the direction change of the trolley. The reversing machine is composed of a conducting means provided on the balance frame so as to be connected to each other with a mechanism interposed therebetween, a driving means for the conducting means, and a pair of reversing machine bodies suspended from the trolleys. The main body is constructed so that a wire that can hang and hang a heavy object is circulated and rotated by a motor drive, and the transmission means intervenes the direction changing mechanism so that the pair of trolleys are always left and right on the balance frame. A crane-hanging heavy load reversing device characterized by being configured to travel in opposite directions.