JPS5980864A - Distributor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a distributor used for pouring concrete.

For example, when placing concrete in the construction of large concrete structures such as bridge piers and buildings, the concrete supply pipe is supported by a boom that can freely turn and bend, and the boom turns and bends to place the concrete in the desired direction. A distributor is used that is cast in place.

In conventional distributors, the beam is raised and lowered using a hydraulic cylinder, which requires a hydraulic unit and the beam control mechanism is complicated and expensive.

Additionally, due to the stroke of the luffing cylinder, the lifting point of the cylinder is close to the base of the boom, and the area from the cylinder lifting point to the tip of the boom has a cantilever structure, which creates a large bending moment on the boom member. In addition, the boom member must be constructed to be sturdy, which has the disadvantage of increasing its own weight.

Furthermore, in concrete pouring work, pouring and cargo handling are essential, and two cranes, a cargo handling crane and a distributor, must be prepared, which requires a large amount of equipment expense.

This invention was made in order to eliminate the drawbacks of the above-mentioned hydraulically controlled distributor.It is lightweight and can be manufactured at low cost, can also be used for cargo handling work, and does not take up a large work space. The purpose is to provide a distributor that can.

The structure of the present invention is that a boom having a bending point of -knot or more is mounted on a swivel table so that it can be raised and lowered freely, the raising and lowering movement of the boom is controlled using a winch and a wire rope, and the wire rope is used to control the lifting and raising of the boom. The support reduces the weight of the boom.

Hereinafter, the present invention will be explained based on the embodiments shown in the accompanying drawings.

As shown in the figure, a swivel base 3 is rotatably provided at the upper end of a column 2 erected on a base 1, and a base portion of a boom 5 is mounted on the swivel base 3 with a bearing 4 so as to be movable up and down. ing.

The above-mentioned support column 2 has a combination structure that can be freely inserted and removed, and the swivel base 3 can be removed from the base 1. A motor 8 equipped with a gear 6 is provided, and when the motor 8 is activated, the swivel base 3 freely rotates through 360 degrees.

In the illustrated case, the boom 5 has a base boom 5a which is attached to the base boom 5a on the group 1 unit 3 with a bearing 4 so as to be able to rise and fall freely, and a base boom 5a that is attached to the base boom 5a so as to be able to rise and fall vertically via a joint mechanism 9. It consists of a tip boom 5b that is attached so that it can be freely folded, and can be folded in two to overlap in parallel with both booms 5a and 5b.The tip end 5c, which is pivotally connected on the tip side of the tip boom 5b, can be further bent, and the The swivel base 3 can be released during folding.

Two winches 10.11 and a support frame 13 with a pulley 12 attached to the upper end are provided on the swivel base 3, and the base boom 5a is supported at its tip side by a wire rope 14 pulled out from one of the winches 10. The lifting angle is controlled by the winch 10 and wire rope 14. The wire rope 14 is wound sequentially from the pulley 12 on the support frame 13 to the pulley 15 of the joint mechanism 9, and then its tip is fixed to the support frame 13.

The tip of the wire rope 16 pulled out from the other winch 11 is passed from the pulley 12 on the support frame 13 to the base boom 5a.
The boom 5 passes through the pulley 17 attached to the tip of the boom 5.
removably connected via a hook 18 approximately in the middle of b;
By operating the winch 11, the tip boom 5b can be raised and lowered with respect to the base boom 5a.

When the boom 5b is folded, the wire rope 16 supporting the tip boom 5b is removed from the boom 5b and attached to the pulley 17.
The base boom 5a can be used to construct a jib crane for cargo handling.

The wire rope 16 supporting the tip end bum 5b has been shown to be controlled by the winch 11, but as shown by the solid line in FIG. It may be fixed, and in this way, when the base boom 5a is raised and lowered, the tip boom 5b automatically moves its tip substantially horizontally, as will be described later.

The concrete supply pipe 19 enters from the bottom along the axis of the support 2, passes through the center of the bearing 4, is pulled out horizontally at the joint 20, and then advances parallel to the base boom 5a. After the joint 21 passes through the axis of the joint mechanism 9 midway, it is arranged parallel to the tip boom 5b, so that it does not interfere with the ups and downs and bending of the boom 5, and the tip part is Tip boom 5b
A flexible hose 22 supported on top and connected to the tip is held in a hanging manner along a guide 23 attached to the tip 5C of the tip boom 5b.

Moreover, the boom 5 is not limited to the structure of the base end boom 5a and the distal end boom 5b as shown in the drawings, and the number of joints can be further increased.

Furthermore, the base 1 can be a stationary pedestal, a mobile pedestal with wheels, or mounted on the top of a tower, depending on the purpose of the work.

When the distributor is mounted on a tower, the entire distributor automatically climbs up the tower, a so-called climbing method, in which it rises as concrete is poured into the structure. Just do it.

Note that a telescopic work scaffold 24 is attached on top of the base 1.

The distributor of the present invention has the above-described configuration, and in order to place concrete, the tip boom 5b is positioned at the tip of the base boom 5a, and the wire rope 16 is used to place the concrete. The flexible hose 22 at the tip of the concrete supply pipe 19 is suspended from the guide 23 of the boom 5b at the tip, and the concrete pumped from the concrete pump is poured into the floor using the supply pipe 19. By rotating the booms 5a and 5b and raising and lowering the booms 5a and 5b, concrete can be placed within the radius defined by the tip of the beam 5 with the support 2 as the center.

Concrete placement position and placement height can be determined using winch io,
Although it can be freely changed by raising and lowering and bending both booms 5a and 5b by operating 1i,
The placing position can be horizontally moved by only operating the winch 10 for the base boom 5a.

In this case, the wire rope 16 of the tip boom 5b is secured to the support frame 13 as shown by the solid line in FIG. When the raising and lowering angle of the base boom 5a is changed in this state, the angle of the tip boom 5b is automatically changed by the action of the wire rope 16 defined to have a constant length.

The relationship between the raising and lowering angle of the base boom 5a and the bending of the tip boom 5b is shown in line drawings in FIG. The tip of the boom 5b moves in a substantially horizontal trajectory.

In addition, in order to carry out cargo handling work, the tip end hook of the wire rope 16 is removed from the tip boom 5b, and the base boom 5b is removed.
a, and the tip boom 5b is suspended from the tip of the first boom 5b.
As shown by the dashed line in the figure, it can be easily folded along the base boom 5a, and cargo handling can be performed using the base boom 5a and the hook 18.

As described above, according to the present invention, since it has the above configuration, it has the following effects.

(1) The base of the boom, which has a bending point equal to or greater than the -knot, is mounted on the swivel platform so that it can be raised and lowered, and the raising and lowering movement of the boom is controlled by a wire rope, so most of the load is carried by the wire rope. The boom can be supported, the bending moment applied to the boom member is small, and the boom can be made smaller and lighter.

(2) Use a winch and wire rope to adjust the undulations of the beam.
This makes it possible to manufacture and provide it at a lower cost than conventional hydraulic systems.

(3) Since the boom's own weight can be reduced, the winch device can be made smaller and lighter, making it possible to reduce costs.

(4) Since the boom is raised and lowered using a wire rope, by simply folding the boom and removing the wire rope, it can be used not only as a concrete pouring machine but also as a jib crane for cargo handling work, making it possible to use concrete that is unsuitable for construction work. An example of pouring and cargo handling

[Brief explanation of drawings]

FIG. 1 is a front view of a distributor according to the present invention;
FIG. 2 is a plan view of the same, and FIG. 3 is a line drawing showing changes in the bending angle of the boom. 1 is the base, 2 is the support, 3 is the swivel, 5 is the boom, 8
is a motor, 9 is a joint mechanism, 10.11 is a winch, 14
．． 16 is wire rope.

Claims (1)

[Claims] 1. A de-strip striper characterized in that a base portion of a boom having a bending point of -knot or more is mounted on a swivel table so as to be movable up and down, and the up-and-down movement of the boom is controlled by a wire rope.