JPH09110360A - Prestressed concrete block holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the placing work of a prestressed concrete block easily performable. SOLUTION: A prestressed concrete block holding device 2 consists of a suction member 2, a first supporting member 6, a second supporting member 8, a rotational driving means 10, a vacuum pump unit, and two connecting fittings 14 and so on. The suction member 4 is composed of a base plate 16 and a pad 18, and a vacuum by a vacuum pump unit acts on the inside of the pad 18 at an underside of the base plate 16. The first supporting member 6 is supported by the second supporting member 8 in a horizontally turnable manner, while the first supporting member 6 is turned round by dint of the rotational driving means 10. In succession, two connecting fittings 14 are installed in the second supporting member 8, and then this prestressed concrete block holding device 2 is vertically hung down at the tip of an articulated arm of a vehicle by means of these connecting fittings 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for holding a PC block.

[0002]

2. Description of the Related Art Usually, a large number of PC blocks are arranged and used when constructing a structure or the like.
For example, when building a sabo dam, PC blocks are aligned and stacked and installed as a formwork for placing concrete. Conventionally, this installation work involves attaching an attachment with two claws to the tip of an articulated arm mounted on a vehicle, and lifting the PC block between the claws.
The articulated arm was operated and moved, and it was installed at a predetermined position.

[0003]

However, when sandwiching the PC block with the claw, it is necessary to sandwich the center of gravity of the PC block so that the PC block does not tilt when lifted, and the articulated arm is operated to grip. It is not always easy to adjust the location, which results in a decrease in work efficiency. Further, conventionally, there has been a problem that the unit price of the PC block is increased because the concave portion and the convex portion must be provided in the PC block so that the PC block can be easily sandwiched by the claws.

On the other hand, in construction of a sabo dam in a dangerous area, it is effective to remotely operate various construction machines for ensuring safety. In such a case, the work of stacking the PC blocks will also be performed remotely. However, when performing remote control, an operator runs an unmanned vehicle while operating a multi-joint arm while watching a TV monitor, which makes it difficult to three-dimensionally grasp the position and shape. It is even more difficult to lift and move the PC block while sandwiching it with the claws and installing it in a predetermined state.

It is therefore an object of the present invention to provide a PC block gripping device which makes it possible to easily lift and move a PC block to set it at a predetermined position.

[0006]

In order to achieve the above object, a PC block gripping device of the present invention comprises a suction member composed of a substrate and a pad attached along the outer edge of the lower surface of the substrate. A first holding member that holds the suction member; a second holding member that is disposed on the first holding member and that holds the first holding member so that the first holding member can turn on a horizontal plane; A swivel drive means provided across the holding member and the second holding member to swivel the first holding member with respect to the second holding member, and a portion surrounded by a pad on the lower surface of the substrate and the vacuum pump device are connected. And a connecting fitting provided on the second holding member and vertically suspended from the end of the multi-joint arm of the construction machine.

Further, the present invention is characterized in that the turning drive means is composed of a hydraulic motor supported by a second holding member. Further, the invention is characterized in that the suction pad is made of an elastic material such as rubber.

In the present invention, the PC block gripping device is attached to, for example, the distal end portion of the articulated arm via the connecting fitting. And when hoisting the PC member, first,
The suction member is arranged on the upper surface of the PC block, and the suction member is sucked onto the upper surface of the PC block by the action of the vacuum pump device. After that, the articulated arm is operated while the suction member is sucked onto the PC block to raise the PC block gripping device and lift the PC block. Then, the first holding member is appropriately turned by the turning drive means, the hoisted PC block is oriented in a desired direction, and the PC block is lowered and installed at a predetermined position.

Therefore, according to the present invention, since the suction member is simply arranged at the center of the upper surface of the PC block, P
It can be attached to the C block very easily. In addition, since it is not necessary to sandwich the PC block with a claw as in the conventional case, it is not necessary to provide a concave portion or a convex portion for gripping the PC block, and the unit cost of the PC block can be reduced.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. 1 is a plan view of a PC block gripping device according to the present invention, FIG. 2 is a front view of the same, FIG. 3 is a side view of the same, and FIG. 4 is a side view of a vehicle equipped with the PC block gripping device. The PC block gripping device 2 includes a suction member 4 and a first holding member 6.
The second holding member 8, the swivel driving means 10, the vacuum pump device 12, the connecting fitting 14, and the like.

The suction member 4 is composed of a substrate 16 and a pad 18. The substrate 16 is rectangular in a plan view in the embodiment. The pad 18 is made of rubber and is attached along the four sides of the lower surface of the substrate 16 without leaving a gap.
The vacuum pump device 12 is mounted on the vehicle 50. Two holes 1602 are formed at a predetermined position inside the suction pad 18 of the substrate 16, and each of the holes 1602 is formed.
2, the vacuum hose 20 connected to the vacuum pump device 12 is connected on the upper surface side of the substrate 16, and the vacuum by the vacuum pump device 12 is configured to act on the inner surface of the pad 18 on the lower surface of the substrate 16. The vacuum pump device 12 includes a vacuum pump 12A, a tank 12B, and an electromagnetic valve 12C. The vacuum hose 20 is connected to the tank 12B via the electromagnetic valve 12C, and the tank 12B is a vacuum pump via a predetermined pipe. 12A is connected.

An upper member 22 is attached to the upper surface of the substrate 16 along the longitudinal direction at the center of the substrate 16, and a cylindrical member 24 is fixed to the longitudinal center of the upper member 22. A flange portion (not shown) is formed on the outer peripheral portion of the upper end of the cylindrical member 24, and a tooth portion (not shown) is formed on the inner peripheral portion thereof. The upper member 22 and the cylindrical member 24 form a first portion. The holding member 6 is configured.

The second holding member 8 has a frame 26.
And a ring member 28 attached to the lower surface of the frame 26. The frame 26 is formed in a rectangular shape smaller than the substrate 16 in a plan view, and has a hole 30 in the center. The ring member 28 is
It is attached to the lower surface of the frame 26 along the periphery of the hole 30. The flange portion of the cylindrical member 24 is horizontally rotatably coupled via a thrust bearing (not shown) in an annular groove (not shown) provided in the inner peripheral portion of the ring member 28. The first holding member 6 is supported by the second holding member 8 so as to be horizontally rotatable.

Reference numeral 32 denotes a hydraulic motor. The hydraulic motor 32 is supported by the frame 26, and the gear 34 attached to the output shaft of the hydraulic motor 32 is meshed with the tooth portion of the cylindrical member 24 to operate the hydraulic motor 32. The first holding member 6 is configured to rotate by the above, and in the working zero, these hydraulic motors 3
2, the gear 34, the tooth portion of the cylindrical member, the swing drive means 10
Is configured. The hydraulic motor 32 is connected to the pipe 38.
Is connected to a hydraulic device (not shown) provided in the main body of the vehicle 50.

On the upper surface of the frame 26, the connecting fitting 14 is attached.
The connection fitting 14 is for connecting the second holding member 8 to the tip of the multi-joint arm 52 of the vehicle 50. The connecting metal fittings 14 have holes 3 sandwiched between them.
Two are provided at positions equidistant from 0. Connection bracket 1
4 is two arms 1 which are erected from the upper surface of the frame 26.
402 and a shaft 1404 rotatably mounted between the upper ends of the arms 1402.

FIG. 5 is an explanatory view of a connected state of the articulated arm and the connecting fitting. Such a PC block gripping device 2
Is attached to, for example, the tip of an articulated arm 52 mounted on the vehicle 50 via a connecting fitting 14. This attachment attaches the shaft 56 to the tip of the articulated arm 52,
Both ends of the shaft 56 and the shaft 1404 of the connecting fitting 14 are respectively connected by using links 60. The link 60 can be configured by, for example, a rod 6002, a hook 6004 and a ring 6006 provided at both ends of the rod 6002, and the PC block gripping device 2 is attached by being attached via the connecting metal fitting 14. The multi-joint arm 52 is always suspended vertically.

The installation of the PC block by the vehicle 50 equipped with the PC block gripping device 2 of this embodiment is performed as follows. First, the vehicle 50 is run, and the articulated arm 52 is
Is swayed, bent, extended, or swung to arrange the suction member 4 of the PC block gripping device 2 on the upper surface of the PC block to be moved. At this time, if the PC block is, for example, a rectangular parallelepiped, the suction member 4 may simply be arranged at the center of the upper surface of the PC block.

Then, the electromagnetic valve 12C is opened, and the tank 12B is evacuated by the vacuum pump 12A.
Connect the vacuum hose 20. As a result, pad 1
Air on the lower surface of the substrate 16 surrounded by 8 is sucked, and the suction member 4 is sucked on the upper surface of the PC block. In this state, the multi-joint arm 52 is operated again to lift the PC block and move it above the installation location.

Next, the hydraulic motor 32 turns the first holding member 6 to set the orientation of the PC block to a desired orientation. Then, operate the articulated arm 52 to
Lower the block and place it in place. Then, the electromagnetic valve 12C is closed and 12B of the vacuum hose 20 is closed.
Disconnect to and release to atmosphere. As a result, the suction of the suction member 4 on the PC block is released. When the suction is released, the articulated arm 52 is operated to separate the PC block gripping device 2 from the PC block, and one PC
Finish installing the block.

When the PC block gripping device 2 is used in this manner, the PC block is not sandwiched between the nails as in the conventional case.
Since the adsorption member 4 is simply placed on the upper surface of the PC block and is adsorbed to the PC block, it can be attached to the PC block extremely easily. Further, since it is not necessary to sandwich the PC block with the claws as in the conventional case, it is not necessary to provide the PC block with a concave portion or a convex portion for gripping.
The unit price of the C block can be reduced. If, for example, a rectangular PC block is installed horizontally, the PC
It suffices to dispose the suction member 4 at the center of the upper surface of the block, and as a result, it is balanced when lifted, and the upper and lower surfaces of the PC block are horizontal. Therefore, the PC block can be easily installed horizontally and a new PC block can be easily stacked on the already installed PC block. Therefore, even when the unmanned vehicle 50 is run while the television monitor is being viewed and the multi-joint arm 52 is remotely controlled, the PC block can be installed more easily and accurately than when the claw is operated.

Although the pad 18 is made of rubber in the present embodiment, the purpose is to ensure airtightness when the suction member 4 is sucked onto the PC block, so any material having appropriate elasticity can be used. Of course, it is possible to use materials other than rubber. Further, the hydraulic motor 32 for rotating the first holding member 6 can be replaced with an electric motor. Further, the teeth and gears as power transmission means for transmitting the power of the hydraulic motor 32 to the first holding member 6 can be replaced with belts or chains.

[0022]

The PC block gripping device of the present invention is attached to the distal end of an articulated arm, for example, by a connecting metal fitting.
When the PC member is lifted, first, the suction member is arranged on the upper surface of the PC block, and the suction member is sucked onto the upper surface of the PC block by the action of the vacuum pump device.
After that, the articulated arm is operated while the suction member is sucked onto the PC block to raise the PC block gripping device and lift the PC block. Then, the first holding member is appropriately turned by the turning drive means, the hoisted PC block is oriented in a desired direction, and the PC block is lowered and installed at a predetermined position.

As described above, in the PC block gripping device of the present invention, it is not necessary to sandwich the PC block with the claws as in the conventional case, and the suction member is simply sucked to the PC block. Can be attached to. In addition, since it is not necessary to sandwich the PC block with a claw as in the conventional case, it is not necessary to provide a concave portion or a convex portion for gripping the PC block, and the unit cost of the PC block can be reduced. Then, for example, when the rectangular parallelepiped PC block is installed horizontally, it suffices to adsorb the suction member to the center of the upper surface of the PC block, and as a result, when the suspension is lifted, the upper and lower surfaces of the PC block are balanced. Always horizontal. Therefore, the PC block can be easily installed horizontally and a new PC block can be easily stacked on the already installed PC block.
Therefore, even when the PC block is installed by remote control while watching the TV monitor, the work can be performed easily and accurately.

[Brief description of the drawings]

FIG. 1 is a plan view of a PC block gripping device.

FIG. 2 is a front view of a PC block gripping device.

FIG. 3 is a side view of a PC block gripping device.

FIG. 4 is a side view of a vehicle equipped with a PC block gripping device.

FIG. 5 is an explanatory diagram of a connected state of the articulated arm and the connecting fitting.

[Explanation of symbols]

 2 PC block gripping device 4 Adsorption member 6 First holding member 8 Second holding member 10 Swiveling drive means 12 Vacuum pump device 14 Connecting fitting 16 Board 18 Pad 32 Hydraulic motor 50 Vehicle 52 Multi-joint arm

Claims (3)

[Claims] 1. A suction member composed of a substrate and a pad attached along an outer edge of a lower surface of the substrate, a first holding member for holding the suction member, and a first holding member of the first holding member. A second holding member that is disposed above and holds the first holding member so as to be rotatable on a horizontal plane; and a second holding member that is provided over the first holding member and the second holding member A swivel driving unit that swivels the first holding member, a vacuum hose that connects a portion surrounded by a pad on the lower surface of the substrate to a vacuum pump device, and an articulated arm of a construction machine that is provided on the second holding member. A PC block gripping device, comprising: a connecting fitting for vertically suspending the tip of the PC block. 2. The PC block gripping device according to claim 1, wherein the turning drive means is constituted by a hydraulic motor supported by a second holding member. 3. The PC block gripping device according to claim 1, wherein the suction pad is made of an elastic material such as rubber.