JP4051647B2 - Pipe support device for concrete pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe support device for supporting a pipe that is to be removed when a concrete transportation pipe is cleaned after completion of a concrete placing work by a concrete pump.
[0002]
[Prior art]
For example, a boom type concrete pump truck in which a concrete transport pipe is supported along a boom has been widely used in concrete placement at a high place and concrete placement at a remote place.
[0003]
A concrete pump vehicle with a boom has a concrete hopper 2 and a concrete pump 3 that operates to suck and discharge the concrete in the hopper 2 on a deck 1 of a vehicle body, as schematically shown in FIG. The turning table 4 is mounted so as to be turnable, and a multi-stage boom 5 having, for example, a three-stage connection structure is mounted on the turn table 4 so as to be able to rise and fall. A concrete transport pipe 7 for transporting the concrete sucked and discharged from the hopper 2 is placed along the deck 1 from the concrete pump 3, and then supported along the booms 5 of the respective steps. A flexible hose 6 connected to the distal end of the transportation pipe 7 is suspended from the distal end of the uppermost boom 5, and further, the distal end hoses 6 are connected to the hose 6. Connect 8, it is the tip end outlet of the tip hose 8 so that concrete is led to concrete 設個 plants.
[0004]
When a concrete placement work is performed by pumping concrete through the concrete transport pipe 7 along the boom 5 with such a concrete pump vehicle with a boom, the concrete transport vehicle is used at the end of the work. Cleaning for discharging residual concrete in the pipe 7 is required.
[0005]
Conventionally, the concrete transport pipe 7 is washed by removing the base end side of the concrete transport pipe 7 and filling it with a sponge or the like, and then using compressed air led from an air compressor or pressure water pumped from a water pump. By introducing into the concrete transport pipe 7, the filling is pumped to the tip hose 8 side, and the residual concrete in the concrete transport pipe 7 is pushed out and discharged, but prior to this pipe cleaning work. The base end of the concrete transport pipe 7 is used to insert the filling into the concrete transport pipe 7 or to connect a cleaning reducer for guiding compressed air or pressure water to the base end side of the pipe 7. The bent pipe 10 as a connecting pipe located between the outlet and the discharge port 9 of the concrete pump 3 is removed from the discharge port 9 of the concrete pump 3. To have.
[0006]
As shown in FIG. 4, the bent pipe 10 is configured such that the flange 12 provided at the base end is abutted against the flange 11 provided at the discharge port 9 of the concrete pump 3 and is fixed by using a joint 13. The bent pipe 10 can be removed by removing the joint 13. The removed bent pipe 10 is held by the pipe support device 14 so that it can be easily reattached. The pipe support device 14 is provided with a bracket 15 provided so as to protrude to one side portion in the vicinity of the discharge port 9, and a base end portion attached to the bracket 15 by a pin 17 so as to be rotatable in the horizontal direction. A support arm 16 having a required length, a fixing band 18 attached so as to fix and hold an intermediate portion of the bent tube 10 at the distal end portion of the support arm 16, a vicinity of the base end portion of the support arm 16 and a required portion of the bracket 15 Pin holes 19 and 20 are provided, the joint 13 is removed, the support arm 16 is rotated to the position of the two-dot chain line, and the fixing pin is inserted into the pin holes 19 and 20 to place the bent tube 10 at two points. It is configured to be held at a standby position as indicated by a chain line.
[0007]
[Problems to be solved by the invention]
However, the joint 13 is heavy, and removal and attachment of the joint 13 must be performed while the operator holds the joint 13 in a middle waist position. Therefore, a great amount of labor is required, and the removed joint 13 is temporarily removed from the ground. Therefore, it takes a lot of effort to raise and lower the tube, and therefore, there is a problem that the work of removing and attaching the bent tube 10 as a connecting tube becomes a heavy labor.
[0008]
Therefore, the present invention is intended to greatly reduce the labor required to remove and attach the connecting pipe without requiring the operator to lift the joint.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a support arm base having a required length next to a discharge port of a concrete pump in which the base end of a concrete transport pipe is connected via a connecting pipe. In a concrete pump pipe support device in which the end is pivotably attached in the horizontal direction and the connection pipe is fixedly held at the tip of the support arm, the connection pipe and the discharge port are brought into contact with each other and attached or detached. A pipe joint for enabling connection is configured to be supported by an intermediate portion of the support arm.
[0010]
When removing the connecting pipe, after releasing the connection with the discharge port by the pipe joint, the connecting pipe is removed by rotating the support arm to the outside standby position. At this time, the pipe joint also moves together with the support arm.
[0011]
The pipe joint has a support shaft attached to the middle part of the support arm so as to be perpendicular to the abutting surface of the connecting pipe and the discharge port, and a base end portion so that the support shaft can be opened and closed vertically. In the case of a configuration comprising a semi-annular upper and lower joint member consisting of a pair of one and a pair of fastening members that fasten the tip portions of the upper and lower joint members, the connecting pipe is connected by fastening and releasing the fastening member. Can be easily attached and detached.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
FIGS. 1 (a) and 1 (b) show an embodiment of a concrete pump pipe support device of the present invention. As shown in FIG. 4, a connecting pipe located at the base end of a concrete transport pipe 7 is shown. A base end portion of a support arm 16 having a required length is attached to one side portion of the discharge port 9 of the concrete pump 3 to which the bent pipe 10 is connected so as to be rotatable in the horizontal direction. In the configuration in which the bent tube 10 is fixedly held at the distal end portion of the arm 16 via the fixing band 18, the abutting surface between the bent tube 10 and the discharge port 9 is provided at the intermediate portion of the support arm 16. A pipe joint 21 for connecting the bent pipe 10 and the discharge port 9 so as to be detachable is formed by bending a parallel part 16a that is parallel to the parallel part 1 of the support arm 16. It is supported in a a configuration formed by.
[0014]
More specifically, the pipe joint 21 has a tapered groove for receiving and fitting the flange 11 at the distal end portion of the discharge port 9 of the concrete pump 3 and the flange 12 at the proximal end portion of the bent pipe 10 in abutment state. A pair of semi-annular upper joint members 22 and lower joint members 23 each having a groove 25 provided on the inner surface thereof are oriented at right angles to the abutting surfaces of the flanges 11 and 12. The support arm 16 is attached to the inner side of the intermediate parallel part 16a of the support arm 16 so that it can be opened and closed in the vertical direction so that the whole can be opened and closed, while the upper and lower joint members Bifurcated protrusions 26 and 27 that face each other at a predetermined interval are provided at the distal ends of 22 and 23, respectively, and one end of a screw rod 28 is interposed between the bifurcated protrusions 27 of the lower joint member 23. Turn the part up and down When the ring is closed so that it can be closed, the other end side, which is the free end side of the screw rod 28, is rotated upward to be inserted between the bifurcated protrusions 26 of the upper joint member 22. The upper and lower joint members 22 and 23 can be fastened by screwing and tightening a nut 29 from above the bifurcated protrusion 26 to the other end of the screw rod 28 after insertion. It is.
[0015]
In the present embodiment, a square pipe is used for the support arm 16, and the support shaft 24 is attached to the wall portion of the square pipe facing the hopper 2 with the nut 30. Therefore, the nut 30 The assembling opening 31 is formed in the outer wall portion of the parallel portion 16a. Other components that are the same as those shown in FIG.
[0016]
When removing the bent pipe 10 prior to the cleaning work of the concrete transport pipe 7, first, the nut 29 screwed to the screw rod 28 is loosened, and then the screw rod 28 is moved into a bifurcated projection. The upper and lower joint members 22 and 23 are released from each other by turning them downward and turned downward, and then the upper joint member 22 and the lower joint member 23 as shown by a one-dot chain line in FIG. Are pivoted up and down around the support shaft 24 to open the pipe joint 21 so that the connection between the discharge port 9 of the concrete pump 3 and the bent pipe 10 is released. By rotating the support shaft 24 in the horizontal direction to the standby position shown by the alternate long and short dash line in FIG. 1 (a) with the support shaft 24 as a support point, the bent pipe 10 is removed from the discharge port 9 and the base end side of the concrete transport pipe 7 Let open So as to. At this time, since the pipe joint 21 is also integrated with the support arm 16 via the support shaft 24, the pipe joint 21 is rotationally displaced to the standby position simultaneously with the removal of the bent pipe 10. Therefore, in the standby position, after inserting a fixing pin (not shown) into each of the pin holes 19 and 20 to fix the bent pipe 10, the concrete transport pipe 7 is filled and the pipe cleaning work is performed by pumping the filling. To do.
[0017]
After the pipe cleaning operation is completed, the bent tube 10 is attached by performing the above procedure in reverse.
[0018]
As described above, the pipe joint 21 in which the connection of the butt portion between the discharge port 9 of the concrete pump 3 and the bent pipe 10 is released at the time of removing and attaching the bent pipe 10 accompanying the pipe cleaning work is removed. In addition, the support arm 16 can support the joint, thereby eliminating the need for the operator to hold the joint in the middle waist position as in the prior art, so that the labor required to remove and attach the bent tube 10 can be reduced. Compared with this, it can be greatly reduced, and it is advantageous for the aging of workers.
[0019]
Next, FIG. 2 shows another embodiment of the present invention. In the pipe support device having the same configuration as shown in FIG. 1, the support shaft 24 of the pipe joint 21 is the same as that shown in FIG. It is attached to the intermediate position of the linear support arm 16 via a triangular prism-shaped attachment member 32.
[0020]
According to the present embodiment, the same effect as the above embodiment can be obtained, and there is an advantage that the support arm 16 does not need to be bent.
[0021]
The present invention is not limited only to the above-described embodiment, and any structure other than the illustrated one can be adopted as the fastening means between the upper and lower joint members 22, 23 of the pipe joint 21. The case where the bent pipe 10 is removed has been described. However, when there is a further short pipe between the bent pipe 10 and the concrete transport pipe, the present invention can be applied to the case where the bent pipe 10 is removed together with the short pipe. Of course, various modifications can be made within the range not to be performed.
[0022]
【The invention's effect】
As described above, according to the concrete pump pipe support device of the present invention, the required length is provided next to the discharge port of the concrete pump which is connected to the base end of the concrete transport pipe via the connecting pipe. In a concrete pump pipe support device in which the base end of the support arm is pivotably attached in the horizontal direction and the connection pipe is fixedly held at the tip of the support arm. The pipe joint for detachably connecting to the outlet is supported by the intermediate part of the support arm. Therefore, when removing and installing the connecting pipe accompanying the pipe cleaning work, the concrete pump Support the pipe joint, which has been released from the connection between the discharge port and connecting pipe, with the support arm together with the removed connecting pipe. Therefore, it is possible to eliminate the need for an operator to hold a heavy joint with a middle waist posture as in the past, and the labor required to remove and attach the connecting pipe is greatly reduced compared to the conventional case. The pipe joint can be opened and closed vertically with respect to the support shaft attached to the intermediate portion of the support arm so as to be oriented at right angles to the connecting surface of the connecting pipe and the discharge port. As shown in the figure, the upper and lower joint members having a semi-annular shape with a base end attached thereto and the fastening member for fastening the distal ends of the upper and lower joint members to each other are attached. It exhibits an excellent effect that the removal work can be easily performed.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a pipe support device for a concrete pump according to the present invention, in which (A) is a schematic plan view, and (B) is a partially cut schematic front view.
FIG. 2 is a schematic plan view showing another embodiment of the present invention.
FIG. 3 is a perspective view schematically showing an example of a boom-equipped concrete pump truck.
FIG. 4 is a schematic plan view showing a conventional pipe support device.
[Explanation of symbols]
2 Concrete hopper 3 Concrete pump 7 Concrete transport pipe 9 Discharge port 10 Curved pipe (connecting pipe)
16 Support arm 21 Piping joint 22 Upper joint member 23 Lower joint member 24 Support shaft 28 Screw rod (fastening member)
29 Nut (fastening member)

Claims (2)

Next to the discharge port of the concrete pump that is designed to connect the base end of the concrete transportation pipe via a connecting pipe, the base end of the support arm with the required length is attached to be rotatable in the horizontal direction. In the concrete pump pipe support device in which the connecting pipe is fixedly held at the tip of the support arm, a pipe joint for detachably connecting the connecting pipe and the discharge port is provided. A pipe support device for a concrete pump, characterized in that it has a configuration that is supported by an intermediate part of an arm. A support shaft attached to the middle part of the support arm so that the pipe joint is oriented at right angles to the abutment surface of the connecting pipe and the discharge port, and a base end is attached to the support shaft so that it can be opened and closed vertically 2. The pipe support device for a concrete pump according to claim 1, comprising a semi-annular upper and lower joint member comprising a pair of one pair and a fastening member for fastening the distal ends of the upper and lower joint members.

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