JPH0753179A - Inching controller for hoisting rope - Google Patents

Abstract

PURPOSE:To improve the correctness and safety in the inching control by laying a hoisting rope at least on one connecting sheave and a hook sheave having a hoisting hook installed, and controlling the hoisting rope to the fine speed shift on the shift passage of the hoisting rope. CONSTITUTION:A horizontally traveling trolley 13 is supported in a shiftable manner on a traveling girder 11 by a wheel 12, and a hoisting rope 14 driven out from a hoisting drum 15 installed on the horizontally traveling trolley 13 is wound between a fixed sheave 16 and a hook sheave 19, and the top edge part is connected with the relaying installation part 23 of a screw shaft 21 of a driving device 20. When a load member 17 is lowered onto a floor surface 24 the hoisting drum 15 is revolution-driven to drive out the hoisting rope 14, and a hoisting hook 18 is lowered, together with the hook sheave 19. Further, the driving device 20 is driven to shift the screw shaft 21 downward at a fine speed, and also the hoisting rope 14 is driven out similarly at a fine speed, and then the hoisting hook 18 lowers slowly. Accordingly, the load member 17 can be correctly landed on the floor surface 24 at a fine speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoisting rope inching control device for moving a hoisting rope used in a crane or the like by a desired distance.

[0002]

2. Description of the Related Art In the construction of a high-rise building, an overhead crane or the like is used to convey joining members and the like. Fig. 7 is a schematic diagram showing a carrier used in a high-rise building construction site.
FIG. 8 shows a schematic configuration of a conventional hoisting device in the carrying device.

As shown in FIG. 7, a building structure 101 is under construction, and a plurality of columns 102 are supported on the upper part of the building structure 101 so as to be vertically movable. A hat beam 103 is fixedly supported. An overhead crane 104 is provided on the hat beam 103 via a traveling rail (not shown). This overhead crane 104 includes a traverse trolley 105 and a hoisting hook 1.
06, the load member 107 such as a joining member forming the building structure 101 can be lifted.

Conventionally, there are various types of hoisting devices for the overhead crane 104. For example, as shown in FIG. 8A, a traverse trolley 105 is movably supported by a traveling girder 111, and a hoist drum 113 around which a hoist rope 112 is wound can be driven and rotated. And a fixed sheave 114 is rotatably attached. And the hoisting rope 112
Is wound around the hook sheave 115 having the hoisting hook 106 via the fixed sheave 114, and the end thereof is fixed to the connecting portion 116 of the traverse trolley 105. Therefore, when the hoisting drum 113 is driven and rotated while the hoisting hook 106 lifts the load member 107, the hoisting rope 112 is wound around the hoisting drum 113 and the hoisting hook 106 ascends together with the hook sheave 115. The load member 107 can be raised.

As another hoisting device, as shown in FIG. 8 (b), a traverse trolley 105 is movably supported by a running girder 121, while a hoisting drum 123 around which a hoisting rope 122 is wound. Is rotatably attached to the traveling girder 121. Then, the hoisting rope 122 is wound around the hook sheave 126 having the hoisting hook 106 via the fixed sheaves 124 and 125, and the end portion is fixed to the connecting portion 127 of the running girder 121. Therefore, the hoisting hook 1
06 the hoist drum 12 with the load member 107 being lifted.
When 3 is driven and rotated, the hoisting rope 122 is wound around the hoisting drum 123, and the hoisting hook 106 is lifted together with the hook sheave 126, and the load member 107 can be lifted up.

[0006]

In the construction work of a high-rise building using the overhead crane 104 equipped with the above-mentioned conventional hoisting device, the loading work of the load member 107 by the crane is carried out at the upper end floor work of the building structure 11. Due to the congestion, the height up to the overhead crane 104 is limited, which makes it difficult to vertically carry in long members. Then, the load member 107
After loading, the amount of lowering when lowering on the existing building structure 11 or the work floor surface becomes small, and the hanging work becomes difficult. Further, due to the frequent horizontal movement, vertical movement, and braking operation of the load member 107 suspended on the overhead crane 104, considerable vibration is constantly generated on the hat beam 103 supporting the overhead crane 104.

On the other hand, in the lowering inching control by the overhead crane 104, 20 to 30 can be obtained by one inching control.
It causes a descent in mm, and it is difficult to descent in a smaller distance. Further, in the hoisting device shown in FIG. 8 (b), since the hoisting rope 122 that horizontally reevers loosens due to its own weight, the descending distance in inching control is not constant,
This includes problems such as unstable control. for that reason,
For example, the lower end of the load member 107 is lowered to a height of about 100 mm on an existing member or the floor by a normal lowering operation and stopped, and inching lowering control is performed from that position. The lower end of the load member 107 descending by the inching lowering control collides with the existing structure during the lowering operation, and when the inching lowering descent is synchronized with the vibration of the hat beam 103, it strongly collides with the existing structure and is softly attached. There is a problem that the operation of placing the floor on the floor becomes difficult, resulting in damage to each other and danger.

The present invention solves such a problem, and an object of the present invention is to provide an inching control device for a hoisting rope, which improves the accuracy and safety of inching control.

[0009]

SUMMARY OF THE INVENTION To achieve the above object, a hoisting rope inching control device according to the present invention comprises a connecting sheave and a hoisting hook in which one or more hoisting ropes fed from a hoisting drum are provided. Is wound around a hook sheave to which is attached, and a driving means capable of controlling a slow speed movement of the hoisting rope is connected on the moving path of the hoisting rope.

[0010]

When the load member is hung down, the hoisting drum is rotated and the hoisting rope is paid out to lower the hoisting hook to lower the load member at a predetermined speed. Stop at. Then, by lowering the hoisting hook while moving the hoisting rope at a very low speed from this position by the driving means, the load member is lowered at a very low speed below a predetermined speed or intermittently, and at a predetermined hanging position. Accurately and safely without collision.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a schematic configuration of an inching control device for a hoisting rope according to a first embodiment of the present invention.

As shown in FIG. 1, in the hoisting rope inching control device of this embodiment, a drive means capable of controlling the hoisting rope to move at a very low speed is connected to the end of the hoisting rope. That is, the traverse trolley 13 is movably supported by the wheels 12 on the traveling girder 11, and the hoisting drum 15 around which the base end side of the hoisting rope 14 is connected and wound around the traverse trolley 13. The stationary sheave 16 is rotatably mounted by a drive motor (not shown) and is rotatably mounted. On the other hand, the packing member 17
A hoisting sheave 19 is attached to the hoisting hook 18 for hanging the. A driving device 20 as a driving means for controlling the hoisting rope 14 to move at a slow speed is configured by engaging a screw nut that is rotated by a motor (not shown) with a screw shaft 21, and the traverse trolley 13 is shaken by a horizontal shaft 22. It is movably attached.

The hoisting rope 14 fed from the hoisting drum 15 is wound around the fixed sheave 16 and the hook sheave 19, and the tip end thereof is connected to the connecting portion 23 of the screw shaft 21 of the drive unit 20. ing. The effective length of the screw shaft 21 is inversely proportional to the number of windings of the hoisting rope 14 between the fixed sheave 16 and the hook sheave 19, and is 2 to 4 times the required lift of the hoisting hook 18. Is needed.

Therefore, when the load member 17 is hung on the floor surface 24, the hoist drum 15 is rotationally driven to wind the hoist rope 14.
And the hoisting hook 18 is lowered together with the hook sheave 19 to lower the load member 17 at a predetermined speed, and the hoisting hook 18 is stopped at a position P ₁ slightly above the hanging position. Then, from this position P ₁ , the hoisting rope 14 is subjected to inching drive control to perform the hoisting hook 18
(Loading member 17) is slowly suspended. That is, when the drive device 20 is driven, the screw shaft 21 moves downward at a very low speed to feed the hoisting rope 14 at the same minute speed, and the hoisting hook 18 slowly descends. The load member 17 suspended on the hoisting hook 18 is lowered at a very low speed below a predetermined speed, and the load member 17 collides with the floor surface 24 when the hoisting hook 18 stops at the hoisting position P _2. It is accurately lowered without being.

The distance between the intermediate stop position P ₁ of the hoisting hook 18 and the hoisting position P ₂ (distance between the load member 17 and the floor surface 24) is generally about 100 mm, and this distance is set to this value. 18 moves slowly. The slow-down operation of the hoisting hook 18 is intermittently performed, for example, at a distance of 100 mm by 20 mm, and the operator confirms that the lower end of the load member 17 has landed on the floor surface 24 by visual inspection by a worker or a sensor. Drive device 2
Stop 0. Further, when the hoisting hook 18 moves at a very low speed, the screw shaft 21 of the drive device 20 is fed downward. At this time, the drive device 20 swings by the horizontal shaft 22, so that the screw shaft 21 and the hoisting rope 14 are oscillated. Is always kept straight.

After the load member 17 has landed on the floor surface 24, the load member 17 is removed from the hoisting hook 18, or the hoisting drum 15 winds up the hoisting rope 14 to empty the hoisting hook. After raising 18, the driving device 20 is reversely driven to move the screw shaft 21 upward and return it to the original position. Therefore, the next loading operation can be performed.

As described above, in the hoisting rope inching control device of this embodiment, the rotation of the hoisting drum 15 is stopped immediately before the load member 17 lands on the floor surface 24, and the driving device is driven from that position. The load member 17 can be moved down intermittently at a very low speed by 20.
Be safely lowered without colliding with.

FIG. 2 shows a schematic configuration of a hoisting rope inching control device according to a second embodiment of the present invention. The members having the same functions as those in the above-described embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

As shown in FIG. 2, in the hoisting rope inching control device of this embodiment, a drive means capable of controlling the hoisting rope to move at a low speed is provided on the fixed sheave of the trolley. That is, a traverse trolley 13 is movably supported by wheels 12 on a traveling girder 11, and a hoisting drum 15 around which a hoisting rope 14 is wound is rotatably mounted. Also, this traverse trolley 13
A movable base 31 is supported by a vertical guide 32 so as to be movable up and down, and a fixed sheave 16 is rotatably attached to the center of the movable base 32. Hoisting rope 1
Drive device 20 as a drive means for controlling the low-speed movement of 4
Is configured by engaging a screw nut that is rotated by a motor (not shown) with the screw shaft 21, and the four screw shafts 21 are positioned on the transverse trolley 13 at the front, rear, left and right of the fixed sheave 16. On the other hand, the main body of the drive device 20 is attached to the movable table 32.

The hoisting rope 14 fed from the hoisting drum 15 is fixed to the stationary sheave 1 via a sheave (not shown).
6 and the hook sheave 19 are hung up around the running girder 11.
Is connected to a connecting portion (not shown).

Therefore, when the load member 17 is hung on the floor surface 24, the hoist drum 15 is rotationally driven to wind the hoist rope 14.
Then, the hoisting hook 18 is lowered together with the hook sheave 19 to lower the load member 17 at a predetermined speed, and the hoisting hook 18 is stopped at a position P ₁ slightly above the hanging position. When the drive device 20 is driven from this position P ₁ to move the movable table 31 downward with respect to the screw shaft 21 at a very low speed, the hoisting rope 18 and the hoisting hook 18 are moved.
Moves downward at a very low speed, the load member 17 is lowered at a slow speed below a predetermined speed, and the hoisting hook 18 stops at the hoisting position P ₂ so that the load member 17 does not collide with the floor surface 24 accurately. Be lowered.

FIG. 3 shows a schematic structure of an inching control device for a hoisting rope according to a third embodiment of the present invention, and FIG. 4 shows details of a drive device. The members having the same functions as those in the above-described embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

As shown in FIGS. 3 and 4, in the hoisting rope inching control device of this embodiment, a drive means for controlling the hoisting rope at a very low speed is provided on the fixed sheave of the traveling girder. There is. That is, the hoisting rope 14 unwound from each hoisting drum 15 mounted on the traveling girder 11 is hung between the fixed sheave 16 and the hook sheave 19 of the traverse trolley (not shown) via the pair of end sheaves 33 and 34, respectively. It is rotated and connected to the connecting portions 35 of the traveling girders 11, respectively. The hoisting hook 18 is attached to the pair of hook sheaves 19. The drive device 20 as a drive means for controlling the hoisting rope 14 to move at a slow speed is constituted by a screw shaft 21 being engaged with a screw nut rotated by a motor (not shown), and adjacent to each end sheave 34 of the traveling girder 11. Installed. On the other hand, the end sheaves 34 are respectively movable brackets 3.
6 is supported by a horizontal guide 37 and is horizontally movable by a horizontal guide 37. One end of a screw shaft 21 of the drive device 20 is connected to the movable bracket 36.

Therefore, when hoisting the load member 17 on the floor surface 24, the hoist drum 15 is rotationally driven to wind the hoist rope 14.
Then, the hoisting hook 18 is lowered at a predetermined speed together with the hook sheave 19, and the load member 17 is stopped at a position slightly above the hanging position. Then, when the drive device 20 is driven from this position to horizontally move the movable bracket 36 along the guide 37 via the screw shaft 21, the hoisting rope 14 is fed at a slow speed, and the hook sheave 19 slowly descends. The load member 17 is lowered together with the hoisting hook 18 at a slight speed below a predetermined speed, and the load member 17 is lowered without colliding with the floor surface 24.

FIG. 5 shows a schematic structure of a hoisting rope inching control device according to a fourth embodiment of the present invention. The members having the same functions as those in the above-described embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

As shown in FIG. 5, in the hoisting rope inching control device of this embodiment, the hoisting drum of the running girder is provided with a drive means capable of controlling the hoisting rope to move at a low speed. That is, the hoisting drum 15 mounted on the traveling girder 11
The hoisting rope 14 fed out from the end sheave 33, 3
4 is hung between the fixed sheave 16 and the hook sheave 19 of the traverse trolley 13, and is connected to the connecting portion 3 of the traveling girder 11.
5 are connected to each other. And hook sheave 1
A winding hook 18 is attached to the cable 9. Hoisting rope 1
Drive device 20 as a drive means for controlling the low-speed movement of 4
Is configured by engaging a screw nut that is rotated by a motor (not shown) with the screw shaft 21, and is mounted adjacent to the hoisting drum 15 of the traveling girder 11. On the other hand, the hoisting drum 15 is mounted on a movable mount 38 and supported by a horizontal guide 39 so as to be horizontally movable, and one end of a screw shaft 21 of the drive device 20 is connected to the movable mount 38.

Therefore, when the load member 17 is hung on the floor surface 24, the hoist drum 15 is rotationally driven to wind the hoist rope 14.
Then, the hoisting hook 18 is lowered at a predetermined speed together with the hook sheave 19, and the load member 17 is stopped at a position slightly above the hanging position. Then, when the drive device 20 is driven from this position to horizontally move the movable mount 38 along the guide 39 via the screw shaft 21, the hoisting rope 14 is fed at a slow speed, and the hook sheave 19 slowly descends. The load member 17 is lowered together with the hoisting hook 18 at a slow speed below a predetermined speed, and the load member 17 is lowered without colliding with the floor surface 24.

FIG. 6 shows a schematic structure of a hoisting rope inching control device according to a fifth embodiment of the present invention. The members having the same functions as those in the above-described embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

As shown in FIG. 6, in the hoisting rope inching control device of this embodiment, the hoisting rope between the hoisting drum and the end sheave has a drive means capable of controlling the hoisting rope to move at a very low speed. It is provided above. That is, the traveling girder 11
The hoisting rope 14 unwound from the hoisting drum 15 mounted to the traverse trolley 1 via the end sheaves 33, 34.
The fixed sheave 16 and the hook sheave 19 of No. 3 are wound around and connected to the connecting portions 35 of the traveling girder 11, respectively. The hoisting hook 18 is attached to the hook sheave 19. The drive device 20 as a drive means for controlling the hoisting rope 14 to move at a slow speed is configured by engaging a screw nut that is rotated by a motor (not shown) with the screw shaft 21. On the other hand, between the hoisting drum 15 and the end sheave, a pair of guide rollers 40 for holding the hoisting rope 14 are pivotally supported by a support frame 41. The support frame 41 is a vertical guide fixed to the traveling girder 20. 42
It is supported by the vertical movement. The drive device 20 is attached below the guide roller 40 (support frame 41), and the upper end of the screw shaft 21 is connected to the support frame 41.

Therefore, when hoisting the load member 17 on the floor surface 24, the hoist drum 15 is rotationally driven to wind the hoist rope 14.
Then, the hoisting hook 18 is lowered at a predetermined speed together with the hook sheave 19, and the load member 17 is stopped at a position slightly above the hanging position. Then, the drive device 20 is driven from this position to support the support frame 41 via the screw shaft 21.
Is moved upward along the guide 42, the bent hoisting rope 14 is unreeled at a slow speed, the hook sheave 19 is slowly lowered, and the hoisting hook 18 and the load member 17 are lowered at a slow speed below a predetermined speed. The load member 17 is lowered without colliding with the floor surface 24.

In each of the above-described embodiments, the drive device 20 is constructed by engaging the screw shaft 21 with the screw nut rotated by the motor, but the structure is not limited to the embodiment, and the winding is not limited. Any structure may be used as long as the upper rope 14 can be controlled to move at a low speed.

[0032]

As described above in detail with reference to the embodiments, according to the hoisting rope inching control device of the present invention, the hoisting rope fed from the hoisting drum has one or more connecting sheaves and Since the hoisting hook is wound around the attached hook sheave and the driving means for controlling the fine speed movement of the hoisting rope is connected on the moving path of the hoisting rope, the inching lowering operation of the load member is not called the hoisting drum. By using another driving means capable of controlling the movement at a low speed, the load member can be lowered at a low speed and intermittently by this driving device immediately before the load member is landed on the floor surface, and the vibration and The influence of gravitational acceleration can be avoided, and the load member can be safely landed without impact. As a result, it is possible to improve the accuracy and safety of inching control.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an inching control device for a hoisting rope according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an inching control device for a hoisting rope according to a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of an inching control device for a hoisting rope according to a third embodiment of the present invention.

FIG. 4 is a detailed view of a drive device.

FIG. 5 is a schematic configuration diagram of a hoisting rope inching control device according to a fourth embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of an inching control device for a hoisting rope according to a fifth embodiment of the present invention.

FIG. 7 is a schematic diagram showing a transfer device used in a high-rise building construction site.

FIG. 8 is a schematic configuration diagram showing a conventional hoisting device in a carrying device.

[Explanation of symbols]

 11 Traveling Girder 13 Traverse Trolley 14 Hoisting Rope 15 Hoisting Drum 17 Carrying Member 18 Hoisting Hook 19 Hook Sheave 20 Drive Device 21 Screw Shaft 24 Floor Surface 31 Movable Platform 33, 34 End Sheave 36 Movable Bracket 38 Movable Mounting Platform 40 Guide Roller 41 Support frame

Claims (1)

[Claims] 1. A hoisting rope unwound from a hoisting drum is wound around a hook sheave to which one or more connecting sheaves and hoisting hooks are attached, and the hoisting rope is provided on a moving path of the hoisting rope. An inching control device for a hoisting rope, characterized in that a driving means capable of controlling a slow speed movement is connected.