JPS60112962A - Emission port metal fittings of concrete hose - 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 the provision of an attachment type concrete hose discharge outlet fitting.

In conventional concrete placement, the following problems are caused by the high speed of the fresh concrete pressure hose tip.

i) Because the discharge speed of ready-mixed concrete is high in formwork for columns, walls, etc., the impact force increases and the formwork may be damaged or destroyed.

11) Increase pouring efficiency when pouring floor concrete. Plan to save labor. From the three viewpoints of not protruding the reinforcement, formwork 1. as shown in Figure 1. It is desirable to hold the pressure feed hose 3 in a vertical position above the reinforcing bars 2 and discharge the ready-mixed concrete 4 and drop it, but since the impact force exerted on the formwork 1 due to the falling speed is large, it is unavoidable to use the method shown in Fig. 2. I had no choice but to lay down hose 3 and install it.

iii) When pouring columns and walls with a high floor height, or when the falling height is high during underground construction work, the fresh concrete 4 at the discharge port will receive kinetic energy in addition to the kinetic energy given by the pump truck. Ready-mixed concrete may separate because potential energy is added due to the height of the fall.

In response to these problems, conventional measures such as reinforcing the formwork and
Various countermeasures have been taken, such as non-separable ports (those that control the speed of movement inside the hose to be reduced).
``Ili Strong'' is a temporary measure, and new countermeasures are needed due to reasons such as increasing formwork costs and ``various non-separable hoses'' causing severe wear and problems with the durability of the hoses. ing.

In addition, as a recent trend in concrete placing machines, various distributors have been developed in which a pumping boss is placed along an articulated frame G that can be bent vertically or horizontally, with the aim of saving labor in concrete placing work. However, in both cases, the free fall height of the hose at the end may become high, and the problem of concrete separation has been seriously addressed. However, if it were possible to increase the free fall height, the vertical casting range would be expanded and the number of times the machine would need to be reloaded would be reduced, so IW', which addresses this problem, is in real demand.

The present invention was developed in view of the circumstances on paper.The purpose of the present invention is to use an axotiment method to reduce the discharge pressure of fresh concrete discharged from the tip of a concrete pumping hose. This meets the above requirements by providing a discharge port fitting to reduce the impact on the formwork, etc., and to eliminate the separation of fresh concrete.Basically, the pump vehicle's pumping mechanism G is attached to the end of the concrete pumping hose. Freedom to be given or ready-mixed concrete itself.

A mechanism has been added to reduce the impact of ejection caused by dropping.

This will be explained in detail below based on the drawings.

That is, FIG. 3 shows a development and a longitudinal cross-sectional view of the product of the present invention,
In the figure, 5 is an outer pipe with a discharge port 6 on the outer periphery, and 7 is a fresh concrete pipe.
1. A disk moves up and down inside the outer tube 5 according to the discharge pressure. 8 is a helical spring that gives vertical movement to the disk 7. It is mounted by placing its two ends on a communication arm 11 extending from the ring 0 toward the middle rt-c, and with its upper end in contact with the lower surface of the disc 7. A hanging membrane bolt 13 penetrates from the lower surface of the disk 7 into the top plate of the stand portion 12 located at the center of the ring 10 and integrated with the communication arm 11, and a nut 14 is attached to the tip, thereby forming a disk. Regulate the rise of 7.

Furthermore, multiple staggered holes 15 are drilled on the circumferential side of the disk 7 to allow dripping fresh concrete and mortar to escape, but these must be wrapped vertically to prevent them from collapsing. Make it not exist. The ready-mixed concrete that has escaped inward falls further downward from between the communication arms 11. Incidentally, the lower end flange 9 and the ring 10 are connected by a flyer 1-link joint or the like, although not shown.

Figures 4a and 4b show the spring-type discharge outlet fitting according to the present invention under load and under no load. Fresh concrete 1, whose vertical impact force was absorbed by 7.
4 is pushed down and discharged from the discharge port 6 of the opening. When there is no load (when the port 3 is filled with ready-mixed concrete 4 but the pumping device of the pump truck is stopped), the disk 7 in the outer pipe 5 is held above the upper end of the discharge port 6 by the spring 8, and the concrete Concrete 4: Preventing sagging.

Accordingly, with the product of the present invention having a paper structure, the upper end flange 16 of the outer tube 5 can be butted against the flange provided at the tip of the fresh concrete pressure hose, and the hose can be easily assembled using a victric joint. Even if the length is set large, it absorbs the impact force of fresh concrete and concrete can be poured without any impact. In addition, since there is no need to take the trouble to lay down the pressure-feeding bose and place it, the following effects can be achieved.

1) No more disturbing the reinforcement arrangement.

ii) Mechanical force can be used to move the tip of the cylinder, making the work significantly lighter.

iii) Separation of concrete can be prevented.

iv) Reduces impact on the formwork and prevents damage.

Other advantages include that the number of constituent parts is small, that it can be manufactured easily, that it can be easily disassembled and assembled, and that maintenance is easy.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of how a conventional fresh concrete pressure conveying hose is used; Figures 3a, b, and c are exploded views and sectional views taken along the E-line of the product of the present invention; Figures 4a and b are the main FIG. 4 is an explanatory diagram of the invention under load and under no load when using the invention. ■... Formwork, 2... Reinforcement, 3... Pressurized boss, 4
... Fresh concrete, 5 ... Outer pipe, 6 ... Discharge port, 7 ... Disk, 8 ... Spring, 9 ... Lower end flange, 10 ... Ring, 11 ... Communication arm, 12...
・Vertical tube part, 13... bolt. 14... Nut 15... Through hole, 16... Upper end flange a, b.

Claims (1)

[Claims] A discharge port of a concrete hose characterized by incorporating a disc in an outer pipe having a discharge port bored on the outer periphery, which is biased upward by a spring and closes the discharge port when no load is applied, and opens the discharge port when a load is applied. Metal fittings.