JPH01182462A - Concrete distributing device - Google Patents

Abstract

PURPOSE:To facilitate work so as to reduce the cost by connecting a center fold-type auxiliary jib successively in line with a point end of a jib supported onto a frame and distributively mounting a concrete distributing feed pipe along each member to the point end of the auxiliary jib from the bottom end of the frame. CONSTITUTION:A center fold-type auxiliary jib 5 is connected, being able to bend in its base end part in a plane with the lengthwise direction axis existing, successively in line with the point end of a jib 1 being able to perform turning and elevation on a jib supporting frame 2. Next the auxiliary jib 5 hangs down its point end by a wire 4 mounted to the point end of the jib 1. Subsequently, concrete distributing feed pipes 2a, 1a, 5a, 5a are distributively mounted along the lengthwise direction of each constitutional part from the bottom end of the supporting frame 2 to the point end of the auxiliary jib 5. Concrete is forced to be press fed to a hose 7 in the point end of the auxiliary jib 5 from a pump vehicle 8 via a connection steel pipe 9 and the distributing feed pipes 2a, 1a, 5a, 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a concrete delivery device, and particularly to a concrete delivery device using an existing crane.

(Prior Art) When pouring concrete onto a floor or the like in a high position of a building, concrete is currently supplied to the pouring position mainly by the following two methods.

One method is to suspend the hopper r1 with a crane C, supply cement into the hopper H with a pressure pump and hose, and transport the hopper H into the boom 1 of the crane C. The hopper H was rotated and moved to a position near the pouring site, and there the discharge gate of the hopper H was opened and the flexible nozzle 7 provided below was rotated to supply concrete to any desired location.

(Problems to be Solved by the Invention) However, in the case of the above-mentioned method, in order to rotate the flexible nozzle and discharge concrete to an arbitrary location, the person holding the tip of the nozzle and the hopper must At least two workers are required to open and close the gate, and at least two workers are required to operate the vibrator to collect the discharged concrete, making a total of four workers necessary. Also, in this case, generally one conc.
Since the J-toe is discharged intermittently, there is a drawback that work efficiency is deteriorated.

In addition to the above-mentioned method, another traditionally used method is to supply concrete to any location by routing a flexible hose whose base end is connected to the pumping port of a pump truck on the floor. However, in the case of this method, there are operational problems such as damage to the reinforcement arranged on the floor due to the routing of the hose, and there are also problems with the number of workers due to the routing of the hose. There are also problems in terms of work efficiency, such as the amount of time required.

The present invention has been made in view of the above-mentioned current situation, and an object of the present invention is to provide a concrete delivery device that can be implemented at low cost and utilizes a common crane used for transporting materials.

(Means for Solving the Problems) A concrete delivery device according to the present invention includes a jib that is supported on an erected jib support frame so as to be able to rotate and be depressed, and a A concrete delivery device using a jib crane having a structure in which the end of a wire extended from a winch is suspended, and a center-folding auxiliary jib is attached to the tip of the jib of the crane at its base end. The auxiliary jib is connected so as to be freely bendable in the plane where the longitudinal axis of the jib exists, and the tip of the auxiliary jib is suspended from the tip of the jib by a wire extending therefrom;
The present invention is characterized in that a concrete delivery conduit is arranged at least along the longitudinal direction of each component from the jib support frame to the tip of the auxiliary jib.

(Function) Therefore, a concrete delivery device using a jib crane having the above-mentioned configuration is capable of producing a center-bent structure whose base end is connected to the jib tip by adjusting the length of the wire extending from the jib tip. By changing the bending angle of the auxiliary jib with respect to the jib, the center bending angle of the auxiliary jib, and the elevation angle of the jib, the position of the tip of the jib can be adjusted to the position of the longitudinal axis of the jib with respect to the jib. It can be changed freely within the plane.

Furthermore, since the jib can be rotated arbitrarily with respect to the jib support frame, the rigid body on which the longitudinal axis of the jib exists can also be freely changed. and three-dimensional positions).

Therefore, the concrete conveying conduit, which is arranged along the longitudinal direction of each member from the jib support frame to the tip of the auxiliary jib, can move its end on the tip side of the auxiliary jib to any position. Therefore, concrete can be supplied to any location.

In addition, when not in use for concrete supply, the auxiliary jib can be fixed to the jib and the wire suspending the tip of the auxiliary jib can be separated from the auxiliary jib, allowing it to be used as a normal jib crane for transporting materials. Can be done.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a side view showing the overall structure of a concrete placement device using a jib crane according to the present invention, Fig. 2 is a plan view of the auxiliary jib section in an extended state, and Fig. 3 is a side view showing the auxiliary jib part in an extended state. FIG. 3 is a side view showing a state in which the crane is fixed and used as a normal crane.

In FIG. 1, reference numeral 1 denotes a jib, and this jib 1 is supported by a jib support frame 2 erected on the ground so as to be able to swing and be depressed. At the tip of this jib 1, there is a wire 4 that can be freely wound around the base end side or the winch 3.
is hanging.

In the figure, reference numeral 5 denotes an auxiliary jib mo that can be bent upward at the middle 5a. The jib 1 is connected to the jib 1 so as to be flexible within the plane where the longitudinal axis of the jib 1 exists (vertical plane; plane '' which corresponds to the paper plane in FIG. 1).

This auxiliary jib 5 is provided with a connecting fitting (for example, a hook fitting) 4a at the tip of the wire 4 and a corresponding connecting fitting (for example, an eye bolt) 5b at its tip. and a connecting fitting 5b on the side of the auxiliary jib 5 are connected to each other, and the distal end side is configured to be suspended from the jib l. Further, when the auxiliary jib 5 is not used, the auxiliary jib 5 is fixed to the jib 1 side by a fixing means. Although not shown, the fixing means is, for example, by screwing the two together with bolts and nuts, or by providing a fixing fitting at the base end of the jib 1, and connecting this fixing fitting and the connecting fitting 5b of the auxiliary jib 5 separately. A configuration in which they are connected using a prepared wire or the like may be used.

By the way, as shown in FIG. 1 or 2, from the jib support frame 2 to the tip of the auxiliary jib 5, a concrete pumping pipe, in the case of this embodiment, a steel pipe, runs along the longitudinal direction thereof. 2a, 1a, and 5a are arranged. These steel pipes have a connecting part 6 that connects the steel pipes 1a and 58.
The structure is shown in FIG. 4 so that it can be bent at each connecting portion or bending portion. That is, the pipe part P is rotatable with respect to each flange part f which is screwed and fixed to each other, and the sliding surface (not shown) of the flange part f and the pipe part P is designed to prevent concrete from leaking. A sealing material (not shown) is interposed to prevent this.

Further, a flexible (bendable) hose 7 is attached to the tip of a steel pipe 5a for pumping concrete disposed on the auxiliary jib 5.

In FIG. 1, 8 is a pump truck for pumping concrete, 9 is a steel pipe for connecting the pump truck and the steel pipe 2a, and 10 is a weight for hanging the wire 4.

The present concrete delivery device configured as described above operates as follows when used.

That is, before use, connect the connecting fitting 5b at the tip of the auxiliary jib 5.
The connecting fitting 4a of the wire 4 is connected to the connecting fitting 4a of the wire 4.

When pouring concrete on a floor located at a high place, for example, when pouring concrete at the farthest point, tilt the jib l as shown in the solid line in Figure 1, and use the winch of the crane to place concrete. 3 in the unraveling direction to slightly let out the wire 4 and move the hose 7 extending from the tip of the auxiliary jib 5 to the installation position. Then, if pressure feeding of concrete is started in this state, concrete will be supplied to that part, and that part can be poured. and,
If the jib 1 is gradually raised and the wire 4 for suspending the auxiliary jib 5 is further fed out while the concrete remains under pressure, as shown by the chain double-dashed line in Fig. 1,
The hose 7 is moved to the side closer to the jib support frame (left side in FIG. 1), and the part on the front side can be cast.

Further, in the direction perpendicular to the plane of the paper in FIG. 1, concrete can be placed by rotating the jib 1 along with the above-described operation.

Therefore, by the above-described operation, concrete can be placed at any position on a plane (floor surface).

By the way, if the pie break 11 is suspended from the tip of the auxiliary jib 5 with a wire or the like, and if this device is operated by a remote control box, one worker can control the concrete supplying hose 7. While holding the device, another person remotely controls the device while holding the pie break 11.
By operating the vibrator (the weight of the vibrator is not applied) and moving it horizontally, two workers can perform all the concrete pouring work.

Therefore, whereas conventional concrete pouring work required a total of four workers, two to handle the hose at the end and two to operate the pie break, this work can now be done by half the number of workers. be able to.

Further, in the above embodiment, since the entire concrete pipe including the connecting portion is constructed using steel pipes and connecting fittings (flanges), a very long service life can be expected.

Furthermore, when not used as a concrete delivery device,
If the auxiliary jib 5 is fixed along the longitudinal direction of the jib 1 as shown in FIG. 3, the tip of the wire 4 can be freely moved and can be used to convey ordinary materials, etc. .

(Effects) Since the present invention is configured as described above, it has the following effects.

(1) Since the concrete delivery device can be configured using a jib crane used for lifting, lowering, or moving materials, concrete placement becomes dramatically cheaper and easier at sites with jib cranes. Can be implemented.

(2) Therefore, construction costs can be significantly reduced, and the pouring period (construction period) can be significantly shortened.

(3) Also, since concrete is supplied from a hose suspended above (not supported on the floor), there is no need to route the hose around the floor as in the past, so It will not damage the reinforcing bars, etc.

(4) When not used as a concrete delivery device, it can be used as a normal jib crane for transporting materials, etc.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the overall structure of a concrete placement device using a jib crane according to the present invention, Fig. 2 is a plan view of the auxiliary jib portion, and Fig. 3 is a normal view with the auxiliary jib fixed to the jib. FIG. 4 is an enlarged partial view showing a connecting portion of a steel pipe for pumping concrete, and FIG. 5 is an overall side view showing a conventional concrete delivery device. ■... Jib crane, 2... Jib support frame, 3
... winch, 4... wire, 5... auxiliary jib, la, 2a, 5a... steel pipe (concrete delivery pipeline).

Claims (1)

[Claims] A jib is supported on an erected jib support frame so as to be able to rotate and be depressed, and the end of a wire is extended from a winch that can be freely wound around the tip of the jib. A concrete delivery device using a jib crane having a structure in which a jib crane is suspended, and a center-folding type auxiliary jib is attached to the tip of the jib of the crane, and the base end of the jib is bent in a plane in which the longitudinal axis of the jib exists. The auxiliary jib is connected so as to be freely connected, and the tip of the auxiliary jib is suspended from the tip of the jib by a wire extending from there;
A concrete delivery device characterized in that a concrete delivery conduit is arranged along the longitudinal direction of each member from at least the jib support frame to the tip of the auxiliary jib.