JPH0353015Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a leg structure of a pump for pumping fresh concrete.

BACKGROUND ART Generally, a pressure pump is used to feed fresh concrete through a pipe, and the invention described in Japanese Patent Publication No. 35243/1983 is known as this pressure pump. In the above invention, two plunger pumps each consisting of a cylinder and a piston that engages with the cylinders are connected in parallel orthogonally to a sliding plate, and the sliding plate is fixed to a fixed plate in synchronization with the plunger pump by a hydraulic cylinder. A discharge pipe is connected to the center of the fixed plate on which the sliding plate slides, and one end is connected to a hopper on both sides of the discharge pipe. Connect the connected supply pipe to 2
This is a fully connected configuration. When driving the above device, one of the cylinders is communicated with the supply pipe to suck the fresh concrete into the cylinder, while the other cylinder is communicated with the discharge pipe to suck the fresh concrete into the cylinder. extrude,
By alternately performing the suction and extrusion operations, the fresh concrete is continuously pumped. Therefore, according to the above invention, since a complicated structure such as a switching valve is not required, there is no sudden increase in flow path resistance, and ready-mixed concrete can be continuously pumped. The above-mentioned device is equipped with a pedestal that supports the pump body, which mainly consists of a sliding plate to which the plunger pump is connected and a fixed plate to which the fresh concrete supply pipe and discharge pipe are connected. The complete set of equipment, including the above-mentioned pedestal, is transported and used at a location close to the concrete pouring location.

Problems to be Solved by the Invention Since such pumps for pumping fresh concrete must be installed close to the construction site when in use, transportation to the construction site is essential. On the other hand, one end of the fixing plate is pivoted to the end of the pedestal on which the pump main body is supported, and the fixing plate is rotated vertically together with the hopper around this pivoted part as a rotation center, so that the ready-mixed concrete is It is conceivable that the sliding part between the fixed plate and the sliding plate, which switches between suction and discharge, can be opened to facilitate washing with water after work or detailed maintenance and inspection work. In the example device, the pump body and hopper must be set at a position elevated from the ground to a predetermined height. Therefore, it is necessary to equip legs of a predetermined length below the above-mentioned pedestal, but if a plurality of legs are simply fixed to the bottom of the pedestal, these legs will become an obstacle and the entire device will be damaged. It is difficult to load the pump onto a transport vehicle such as a truck, and the stability of the pump body during loading is insufficient, resulting in problems such as the danger of running the vehicle during transport.

Therefore, the present invention was developed in view of the above, and by adding a device to the above-mentioned leg mounting structure, the pump body can be easily held high, and it can be easily loaded onto a vehicle etc. during transportation. Moreover, the present invention provides a leg structure for a pump for pumping fresh concrete that has improved stability during running.

Means for Solving the Problems In order to achieve the above object, the present invention connects a plunger pump consisting of a cylinder and a piston orthogonally to a sliding plate, and connects the sliding plate to a supply pipe and a discharge pipe for fresh concrete. A pump body provided with a hydraulic cylinder that is slidably engaged with a fixed plate connected in parallel, and that allows the sliding plate and the plunger pump to integrally move back and forth in a direction parallel to the fixed plate, and this pump body. One end of the fixing plate is pivoted to the end of the pedestal on which the pump body is supported, and the fixing plate is rotated vertically together with the hopper around this pivoted part as a rotation center. Let it move,
In the pump for pumping fresh concrete that can open the sliding portion between the fixed plate and the sliding plate that switch between suction and discharge of fresh concrete, bottomed cylindrical bodies are placed at multiple locations on the pedestal with the hollow portion facing downward. At the same time, a hook is fixed to the outer surface of the bottomed cylindrical body, and a rod-shaped leg of a predetermined length is removably inserted into the cavity of the bottomed cylindrical body, and a hook is fixed to the outer surface of the bottomed cylindrical body. The leg structure of the pump for pumping fresh concrete is characterized in that a connecting ring attached to the hook is engaged with the hook.

Function When setting up a pump for pumping fresh concrete at a construction site, the pump can be installed by inserting the rod-shaped legs into the bottomed cylindrical body that is fixed to the frame with the cavity facing downward. The main body and hopper can maintain a predetermined altitude. Furthermore, since the connecting ring attached to the outer surface of the leg is attached to the hook fixed to the outer surface of the bottomed cylindrical body, even if the pump body is suspended for installation or movement, the rod-shaped leg does not move. It does not come loose from the pump body and is easy to handle.

Additionally, when loading the entire device onto a truck or the like to transport it to a construction site, the rod-shaped legs can be removed from the bottomed cylindrical body on the pedestal side and the pedestal can be loaded directly onto the truck bed. This has the effect of increasing the stability of the pump body during transportation.

Embodiment An embodiment of the present invention will be described below based on the drawings. FIG. 1 is a side view showing a schematic structure of a pump for pumping fresh concrete according to the present invention, and FIGS. 2 and 3 are explanatory diagrams of its operation. In the figure,
1 and 1a are concrete cylinders, 2 is a sliding plate to which the concrete cylinders 1 and 1a are fixed, 3 is a guide stand, 4 and 4a are fresh concrete supply pipes, 5
is the discharge pipe. The discharge pipe 5 is connected to the center of the fixed plate 11, and supply pipes 4, 4a each having one end connected to the hopper 13 are connected to both sides thereof. The concrete cylinders 1, 1a have one end open and are connected perpendicularly to the sliding plate 2, and the other end is connected to a hydraulic cylinder 14, 14a to constitute two plunger pumps P, M (No. Figures 2 and 3).
The hydraulic cylinders 14, 14a each have a piston rod 8, which has pistons 6, 7, 6a, 7a at both ends.
8a is inserted in the axial direction inside the cylinders 12, 12a. 9 is a connection box between the plunger pump P and the plunger pump M. The sliding plate 2 engages with the guide table 3 and is capable of reciprocating horizontally. Reference numeral 10 denotes a hydraulic cylinder that integrates the plunger pumps P, M and the sliding plate 2 and moves them horizontally inside the guide table 3. The guide stand 3 is fixedly installed on a suitable mounting stand, and includes a fixed plate 11 that comes into close contact with the sliding plate 2.
This fixed plate 11 has the discharge pipe 5 and the supply pipe 4,
4a, and this opening is located at a position facing the opening of the concrete cylinder 1, 1a connected to the sliding plate 2. The supply pipes 4 and 4a of the one-way fresh concrete are equipped with an agitator 1.
A hopper 13 having a built-in hopper 3a is connected thereto, and the ready-mixed concrete supplied into the hopper 13 is sequentially supplied to the supply pipes 4 and 4a.

According to this configuration, fresh concrete is first poured into the hopper 13, and then the hydraulic cylinder 10 is driven to slide the plunger pumps P, M and the sliding plate 2 against the fixed plate 11 using the guide table 3 as a guide. Then, as shown in FIG. 2, the opening of the concrete cylinder and the supply pipe 4 are communicated. Next, when the plunger pump P is driven to pull the piston 6 in a direction away from the sliding plate 2 as indicated by an arrow A, fresh concrete is sucked into the concrete cylinder 1.
Next, the hydraulic cylinder 10 is driven again to move the plunger pump P and the sliding plate 2 in the horizontal direction, and the third
As shown in the figure, the opening of the concrete cylinder 1 and the ready-mixed concrete discharge pipe 5 are communicated with each other. When the piston 6 is pushed out toward the sliding plate 2 as shown by arrow B, the fresh concrete sucked into the concrete cylinder 1 is forced into the discharge pipe 5. At this time, the opening in the concrete cylinder 1a is the supply pipe 4a.
The plunger pump M is driven to pull the piston 6a in the direction away from the sliding plate 2 as shown by arrow A, and fresh concrete is sucked into the concrete cylinder 1a. When all the fresh concrete in the concrete cylinder 1 is pushed out, the hydraulic cylinder 10 is then driven and the second concrete is pushed out again.
As shown in the figure, the opening of the concrete cylinder 1a and the discharge pipe 5 are communicated, the piston 6a is pushed out toward the sliding plate 2 as shown by arrow B, and the above-described discharge operation is performed again. During this time, fresh concrete is being sucked into the concrete cylinder 1 from the supply pipe 4. In this way, the concrete cylinder 1 and the concrete cylinder 1a alternately perform the suction operation and the extrusion operation of the fresh concrete, whereby the fresh concrete is pumped.

Fig. 4 is an overall side view showing an embodiment of a pump for pumping fresh concrete according to the present invention, Fig. 5 is a front view thereof, and Fig. 6 is an exploded perspective view of essential parts showing a specific example of its leg structure. This shows a support structure of a pedestal 16 that supports a pump main body 15 mainly consisting of the plunger pumps P and M, the supply pipes 4 and 4a, the discharge pipe 5, the fixed plate 11, the sliding plate 2, and the like. The plunger pumps P, M have one end of the fixed plate 11 pivoted to the end 16a of the pedestal 16 on which the pump body is supported, and the hopper 1 rotates about this pivoted part.
3 and rotate the fixed plate 11 in the vertical direction,
It is constructed so that the sliding part between the fixed plate 11 and the sliding plate 2, which switch between suction and discharge of fresh concrete, can be opened, and the plunger pumps P and M are used after replacing the packing and face plate and supplying fresh concrete.
The structure is designed to facilitate washing with water and maintenance and inspection. Therefore, the pedestal 16 must maintain an altitude of a predetermined height H from the ground. That is, the base 16 has a bottomed cylindrical body 17.
is fixedly formed with its cavity 17a facing downward, that is, with its bottom facing upward. On the other hand, 18 indicates a rod-shaped leg, and the upper end 18 of the leg 18
a has a shape that can be fitted into the cavity 17a of the bottomed cylindrical body 17. Further, a base body 19 is fixed to the lower end of the leg body 18, and a handle 20 for carrying is attached to the outer surface of the leg body 18. Further, an end portion of a hook 21 is fixed to the outer surface of the bottomed cylindrical body 17, and connecting rings 22a and 22b that can be engaged with the hook 21 are attached to the outer surface of the leg body 18 to maintain a predetermined play. It is attached. According to the above configuration, the legs for supporting the pedestal 16 are divided into the bottomed cylindrical body 17 and the legs 18, and both are detachable and attached to the outer surface of the legs 18. Attached connecting ring 2
2a and 22b are hooked to hooks fixed to the outer surface of the bottomed cylindrical body 17. According to the leg structure of the pump for pumping fresh concrete having such a configuration, the upper end 18a of the leg 18 can be inserted into the bottomed cylindrical body 17, so when the pump body 15 is transported, the leg 18 is removed, and the pump main body 15 is loaded on the loading platform of the truck. After arriving at the construction site, suspend the pump body 15 using a crane, etc., and then lift it to the hook 21.
The legs 18 are suspended from the bottomed cylindrical body 17 by connecting the connecting rings 22a and 22b, and then, by selecting an appropriate ground, the bottomed cylindrical body 17 on the pedestal 16 side is suspended from the top of the leg 18. The pump body 15 is placed so as to be fitted and supported so as to cover the portion 18a. At least four legs 18 are required, and by fitting these legs 18 into the bottomed cylindrical body 17 on the pedestal side as described above, it is possible to maintain the pump body 15 in a stable state. becomes. In addition, the hook 21 and the connecting ring 22a,
22b are connected, the legs 18 will not fall off completely from the bottomed cylindrical body 17, and the legs 18 can be transported while suspended from the frame 16. Accidents such as loss or forgetting to transport can be prevented.

Effects of the Invention As explained in detail above, according to the leg structure of the pump for pumping fresh concrete according to the present invention, the pedestal supporting the pump body and the leg are detachably formed separately, and the lower surface of the pedestal Since bottomed cylindrical bodies that fit and support the upper ends of the legs are fixedly formed at multiple locations, it is possible to hold the pedestal at a predetermined height, and the hopper that supplies ready-mixed concrete can be opened and closed in the vertical direction. At the same time, it is possible to improve the work efficiency when transporting the pump body to the construction site. That is, when loading the pump onto a vehicle such as a truck, it is only necessary to remove the legs from the pedestal and place only the pump body and the pedestal on the loading platform, which facilitates loading and improves stability when traveling. Therefore, the traveling speed of the vehicle can be increased, and the vehicle can arrive at the construction site more quickly, increasing work efficiency. After arriving at the site, if the upper end of the leg is supported by fitting it into the bottomed cylindrical body on the pedestal side, the load of the pump body will be applied to the leg, so there is a risk that the pump body and the leg will come off. This makes it possible to set the pump body stably and ensure safety during work.Furthermore, the connecting ring attached to the outer surface of the leg body can be attached to the hook fixed to the outer surface of the bottomed cylindrical body. Because they are attached, the legs do not come loose from the pump body even when the pump body is suspended for installation or movement, resulting in good handling.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a side view showing the schematic structure of a pump for pumping fresh concrete, Figs. FIG. 5 is a side view of the entire pressure pump, FIG. 5 is a front view thereof, and FIG. 6 is an exploded perspective view of a main part showing a specific example of the leg structure. 1, 1a... Concrete cylinder, 2... Sliding plate, 4, 4a... Supply pipe, 5... Discharge pipe, 6,
7, 6a, 7a... Piston, 8, 8a... Piston rod, 10... Hydraulic cylinder, 11... Fixed plate, 14, 14a... Hydraulic cylinder, 15...
Pump body, 16... Frame, 17... Bottomed cylindrical body, 18... Legs, 19... Base, 20... Handle, 21... Hook, 22a, 22b... Connection ring.

Claims (1)

[Claim for Utility Model Registration] A plunger pump consisting of a cylinder and a piston is connected orthogonally to a sliding plate, and the sliding plate is slidably engaged with a fixed plate to which a fresh concrete supply pipe and a discharge pipe are connected in parallel. The pump body includes a hydraulic cylinder that is configured to integrally move a sliding plate and a plunger pump in a reciprocating direction in a direction parallel to the fixed plate, and a pedestal that supports the pump body. One end of the plate is pivoted to the end of the pedestal on which the pump body is supported, and the fixing plate is rotated vertically together with the hopper around this pivoted part as the center of rotation, thereby sucking and discharging ready-mixed concrete. In the pump for pumping fresh concrete, which can open the sliding portion between the fixed plate and the sliding plate, bottomed cylindrical bodies are fixedly formed at a plurality of locations on the pedestal with the hollow portion facing downward, and the A hook is fixed to the outer surface of the bottomed cylindrical body, a rod-shaped leg body of a predetermined length is removably inserted into the cavity of the bottomed cylindrical body, and a connecting ring is attached to the outer surface of the leg body. A leg structure of a pump for pumping fresh concrete, characterized in that the leg is attached to the hook.