JPS6244036Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cleaning device for cleaning a transport pipe for transporting fresh concrete of a concrete pump truck.

Concrete pump trucks designed to transport ready-mixed concrete to the pouring site pump compressed air into the transport pipe for transporting the ready-mixed concrete after finishing transporting the ready-mixed concrete to remove any remaining concrete in the transport pipe. Cleaning work is being carried out to remove concrete.

Figure 1 shows an example of a conventional device for cleaning the inside of a transport pipe.
A reinforcing member 3 consisting of a sub-frame 3a and a cross member 3b is provided on top of the chassis 2 and also serves as support for various devices. Equipped with a compressor 5, this reserve tank 4
A connecting pipe 7 to which the transport pipe 6 is detachably connected is provided via an on-off valve.

In this conventional device, after the air in the reserve tank 4 is compressed by the air compressor 5 until it reaches a predetermined pressure, the transport pipe 6 is connected to the connecting pipe 7.
Next, the opening/closing valve 8 is opened and the compressed air in the reserve tank 4 is sent into the transport pipe 6, thereby cleaning the inside of the transport pipe 6.

By the way, there are various devices installed on concrete pump trucks, such as concrete pumps, booms used when pouring at high places, hydraulic equipment for driving these, and equipment such as the above-mentioned cleaning equipment. Support members for supporting equipment are required to be as light as possible in order to keep the weight of the concrete pump truck within a weight limit.

Based on such demands, possible methods for reducing the weight of the conventional cleaning device include reducing the size of the cleaning device itself, and using lightweight materials for the cleaning device.

However, in the former case, there is a risk that the compressed air may be insufficiently pressurized or the amount of compressed air may be insufficient, resulting in poor cleaning or inability to wash. , there is a risk of an increase in cost due to limitations on the materials used, and neither of these methods can be a sufficient countermeasure.

This idea was made in view of the above-mentioned circumstances, and it solves the above-mentioned conventional problems by forming the support member hollow and communicating the support member with the air compressor. That is.

An embodiment of this invention will be described below with reference to FIGS. 2 and 3. In addition, in the following explanation, the first
Components common to those in the figures are given the same reference numerals to simplify the explanation.

In the cleaning device of this embodiment, a support member 9 having a hollow interior is integrally provided on the chassis 2 of the vehicle body 1, and an air compressor 5 is mounted on the support member 9. 5 and support member 9
The basic structure is formed by providing a connecting pipe 7 on the supporting member 9 to which a transport pipe 6 for transporting fresh concrete is attached and detached.

To explain these in detail, the support member 9 includes a pair of subframes 9a provided in the longitudinal direction on both sides of the chassis 2, and a cross member 9b that interconnects these subframes 9a. each with a hollow part 9c inside.
is formed.

The air compressor 5 is fixed onto the support member 9 using appropriate means such as bolts or welding, and is communicated with a subframe 9a and a cross member 9b through a high pressure pipe 10.

The connecting pipe 7 is connected to the sub-frame 9a and the cross member 9b through a high-pressure pipe 11 equipped with on-off valves 8, 8, . . . and is fixed to a fixing member 12 provided on the support member 9. .

Further, numeral 13 indicates a concrete pump, and 14
15 is the boom for high-place casting, and 15 is the high pressure pipe 10.
This figure shows the pressure gauges installed in each.

Next, a case will be described in which the inside of the transport pipe 6 is cleaned using the apparatus of this embodiment.

After the concrete pump 13 finishes transporting the fresh concrete, first, the air compressor 5 compresses the air in the subframe 9a and the cross member 9b until it reaches a predetermined pressure. Next, the transport pipe 6 is removed from the concrete pump 13 and connected to the connecting pipe 7. This results in
Open the on-off valves 8, 8... and remove the subframe 9.
If the compressed air inside the cross member a and the cross member 9b is sent into the transport pipe 6, the fresh concrete remaining within the transport pipe 6 can be discharged from the discharge port of the transport pipe 6 by the compressed air.

The interior of the transport pipe 6 is cleaned by the above operations.

However, according to this invention, since the support member is used as a reserve tank, there is no need to provide a reserve tank in the air compressor.
The weight of the cleaning device can be significantly reduced.

In addition, the supporting member is composed of a pair of subframes made of rectangular prism-shaped sealed hollow bodies extending back and forth, and a hollow pipe-shaped cross member that connects and communicates the subframes, and this subframe is connected to the vehicle body. Since it is attached to the chassis, the chassis is sufficiently reinforced against the vertical bending stress applied to the chassis when supporting the load of the equipment. Furthermore, since the sub-frame of the supporting member is formed as a hollow body extending back and forth along the chassis, it has sufficient capacity as a reserve tank, and can store enough gas for cleaning the transport pipes. , the support member itself can be made lighter, and the weight of the concrete pump truck can be reduced, which is an excellent effect.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an example of a conventional device, Figs. 2 and 3 show an embodiment of this invention, and Fig. 2 shows a concrete pump equipped with the device of one embodiment. The side view of the vehicle, FIG. 3, is a schematic diagram showing the connection structure of the main parts. DESCRIPTION OF SYMBOLS 1...Vehicle main body, 2...Chassis, 3...Support member, 3a...Subframe, 3b...Cross member, 5...Air compressor, 6...Transport pipe, 7...
Connection pipe, 8...Opening/closing valve, 9...Supporting member, 9
a...Subframe, 9b...Cross member, 9
c...Hollow part, 10...High pressure pipe, 11...High pressure pipe.

Claims (1)

[Scope of utility model registration request] A pair of sub-frames 3a made of rectangular prism-shaped closed hollow bodies extending back and forth are integrally attached to the chassis 2 at the left and right ends of the chassis 2 of the vehicle body 1.
A support member 3 is composed of a hollow pipe-shaped cross member 3b that connects and communicates with the subframe 3a, and an air compressor 5 for feeding air into the support member 3 is mounted on the subframe 3a. A transport pipe cleaning device for a concrete pump vehicle, characterized in that a connecting pipe 7 to which a transport pipe 6 for transporting fresh concrete is attached and detached is provided in communication with the support member 3.