JPH057380Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is intended to enable the concrete placement location to be easily changed when concrete is transported and placed by a concrete pump truck or the like. This invention relates to a support device for a hose for concrete placement.

[Prior Art] For example, in a concrete pump truck with a boom as shown in FIG. 5, a concrete transport pipe 2 connected to a concrete hopper 1 via a switching valve is
A flexible tip hose 4 is connected to the tip of the concrete transport pipe 2 at the tip of the boom 3 along a boom 3 that can freely rotate and raise and lower, and the tip hose 4 is attached to the tip of the boom 3. Another tip hose 4a is connected to the tip of the tip hose 4 and extended along the hose guide 5, and the boom 3 is rotated, raised and lowered, and the tip hose 4a is guided to the concrete placement site. , the tip of the hose 4a is left facing the concrete placement position, and when concrete placement starts and the placement position is shifted, the operator 0 moves the hose 4a as shown in FIG.
The tip of the concrete is grasped with a rope or the like and moved manually to change the location of concrete pouring.

[Problems to be solved by the invention] However, during concrete pouring, the hose 4a is filled with concrete, and the weight of the hose and concrete makes it difficult to handle the end of the hose, which makes concrete pouring work difficult. As the process progresses, the operator 0 manually changes the position of the tip of the hose 4a, which is extremely hard work.

Therefore, the present invention aims to reduce labor by making it easier to handle the tip of the hose during concrete pouring work, and to enable the work to be carried out more efficiently and safely.

[Means for Solving the Problems] The present invention connects the tip of a concrete transport pipe running along the boom to one end of a bent steel pipe that is supported at the tip of the boom and is swingable in the front-rear direction, and The upper end of the tip hose is rotatably connected to the other end of the bent steel pipe via a swivel bearing, and an angle changing cylinder attached to the tip of the boom is connected to the swivel bearing, and on the outside of the tip hose, A plurality of frames are stacked vertically, and the upper and lower ends of the front sides of each frame body are connected so as to be freely rotatable in the front and back direction, and the upper and lower ends of the rear sides are arranged so as to interfere with each other, and the length is appropriately adjusted. A hose supporting metal fitting configured to be able to bend only in the front direction and limiting the bending angle by connecting with a chain is provided, and one end of the hose supporting metal fitting is mounted on a swivel bearing so as to be able to rotate integrally with the tip hose. Furthermore, a hose supporting winch is mounted on the universal bearing, and the tip of a rope wound around the winch is tied to the other end of the hose supporting hardware.

[Function] When the winch is operated to wind in the rope, the lower end side of the supporting hardware of the tip hose is lifted, allowing the tip hose to be bent into a substantially L-shape.
At this time, since the amount of bending of the hose supporting hardware is limited, even if the end hose has low rigidity, the horizontal portion will not sag significantly. The tip of the hose is mechanically supported via hose support hardware, so when the operator manually or automatically pushes and pulls the tip to the left and right,
The end hose can be freely rotated, and by winding the rope up and down with the winch, the end portion of the end hose can be raised and lowered, and furthermore, by operating the cylinder to extend and contract, the end hose can be swung in a pendulum style. This allows the concrete placement position to be easily changed, reducing the operator's labor.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

1 to 4 show an embodiment of the present invention, in which one end of a bent steel pipe 6 is horizontally supported at the tip of a boom 3 which can be rotated and raised, and one end of the bent steel pipe 6 is supported horizontally. is connected to the tip of the concrete transport pipe 2 that runs along the boom 3 via a bent pipe 7. At the lower end of the other vertical part of the bent steel pipe 6,
A swivel bearing 8 that is rotatable about the axis of the bent steel pipe 6 is attached to the swivel bearing 8, and the tip of an angle changing cylinder 9 attached to the tip of the boom 3 is connected to the swivel bearing 8. Further, the upper end of the tip hose 10 is rotatably supported by the above-mentioned swivel bearing 8 via a short pipe 11 which is a steel pipe, and a winch support 12 is attached to the front surface of the swivel bearing 8. A hose support winch 13 is installed on top.
Further, on the outside of the tip hose 10, there is a structure that can be bent only in one direction and has a bending angle to prevent the tip of the tip hose 10 from sagging due to its own weight and the weight of concrete when the tip of the tip hose 10 is suspended and supported. A hose support hardware 15 is arranged, one end of the hose support hardware 15 is rotatably supported by the swivel bearing 8, and the end of the rope 14 wound around the winch 13 is connected to the hose support hardware 15. Hose supporting hardware 15 tied to the other end
The distal end portion of the distal end hose 10 is supported in a horizontal state via.

The hose supporting hardware 15 is shown in FIGS. 3 and 4.
As shown in the figure, a frame body 16 is formed from vertical members and horizontal members so as to surround the tip hose 10, and the frame body 16 has a lower left-right width smaller than the upper end left-right width on the front side, and a rear side. The sides are structured so that the left and right widths are the same at both the top and bottom ends, and multiple frames 1
6 are overlapped in the vertical direction, and the upper and lower ends of each frame body 16 on the front side are connected with a hinge 17, and the upper and lower ends of each frame body 16 on the rear side are connected with a chain 18 of an appropriate length, When the frame body 16 is bent in the front direction around the hinge 17, the chain 1
The bending angle can be limited by the extension of 8, and
When each frame body 16 is returned to a straight line, the upper and lower ends of the rear surface of each frame body 16 overlap to prevent bending. In addition, the hose support hardware 15
The chains 18 connecting the plurality of frames 16 at the lower end side are made shorter than the chains 18 connecting the plurality of frames 16 at the upper end side of the hose support hardware 15, or all the chains 18 are Make it possible to add rings to make it longer or remove rings to make it shorter.

Drive the hose support winch 13 to remove the rope 1
4 is wound up, the frame 16 near the center of the hose supporting hardware 15 on the outside of the tip hose 10 rotates to the front side around the hinge 17 and breaks, so that the tip side (lower end side) is lifted up. , as shown in FIG. 1, is bent into a substantially L-shape. As a result, the distal end hose 10 is also bent into a substantially L-shape, and the distal end portion is mechanically supported.

When the concrete pump is operated under the above conditions to start concrete placement, concrete enters the tip hose 10 from the concrete transport pipe 2 via the pipes 7, 6, and 11, and is discharged from the tip of the tip hose 10. Pouring is carried out. During this concrete pouring, the distal end of the distal hose 10 is supported by the winch 13 together with the hose supporting hardware 15 via the rope 14, so that the distal end of the hose 10 is not left unattended at the concrete pouring site as in the past. , located above the concrete pouring point.

If the rigidity of the tip hose 10 is small, it will hang downward in the horizontal part of FIG. 1 due to the weight of the hose and concrete during concrete pouring, and each frame 16 will be open around the hinge 17. There is a possibility that the tip portion of the tip hose 10 cannot be maintained horizontally. In order to prevent such a situation, the present invention shortens the length of the chain 18 on the distal end side of the hose support hardware 15 so that the gap between the frames 16 is reduced. Thereby, the hose supporting hardware 15 itself can be maintained in a horizontal state, and the end hose 10 can be prevented from hanging down.

When it becomes necessary to change the concrete placement location as the concrete placement work progresses, the tip hose 10 is appropriately rotated, moved back and forth, or raised and lowered depending on the direction to be changed. Tip hose 10
The rotation can be freely performed in the direction shown by arrow a in FIG. 2 via the swivel bearing 8 by pushing and pulling the distal end of the distal end hose 10 in the left and right directions using the human power of the operator. At this time, since the tip of the tip hose 10 is mechanically supported and floating on the ground,
It is easy to handle and can be rotated with little force. Further, the forward and backward movement of the tip hose 10 can be easily performed by extending or shortening the angle changing cylinder 9 and tilting it together with the swivel bearing 8 in the direction shown by arrow b in FIG. When raising and lowering the tip of the hose 10 to change the concrete discharge height, this can be easily done by winding the rope 14 up and down in the direction of arrow c in FIG. 1 using the winch 13.

In the present invention, the tip hose 10 and the boom 3
and are connected by the angle changing cylinder 9,
Even if the angle of the boom 3 changes, the vertical portion of the tip hose 10 can always be held vertically, and the tip hose 10 can also be tilted in the front-rear direction as described above.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, a height-adjustable support leg may be hung from the tip of the boom 3 so as to be able to rise and fall in order to support the load applied to the tip of the boom 3. Alternatively, the winch 13 and cylinder 9 may be electrically operated.
The end hose 10 may be any type of fluid pressure type.
The turning may also be performed automatically using power.
Furthermore, the present invention can be applied to any device other than a concrete pump truck as long as it uses a boom to place concrete.

[Effects of the invention] As described above, according to the device of the invention, a free bearing is supported at the tip of the boom, the free bearing can be swung by a cylinder, and the tip hose is rotatably attached to the free bearing. Along with supporting
It is equipped with a hose support winch, and the tip of the hose support hardware, which is made up of multiple frames and can be bent only toward the front side and whose bending angle can be adjusted, is supported by the winch via a rope. Because of the structure, the tip of the tip hose can be suspended and supported by a winch, and the tip of the tip hose can be raised and lowered by the winch, and the tip hose can freely turn and swing in the front and back directions. Changing the direction of concrete pouring from the tip of the hose can be performed with a small amount of force, eliminating heavy labor for the operator and streamlining concrete pouring work.
Furthermore, even if the end hose has low rigidity, it is supported by the hose supporting hardware, so the end hose can be supported in an appropriate state.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is an enlarged view of the part shown in Fig. 1, and Fig. 4 is a hose support in the device of the present invention. FIG. 5 is a schematic diagram of a concrete pump truck with a boom, and FIG. 6 is a schematic diagram of a conventional system. 2 is a concrete transport pipe, 3 is a boom, 8 is a swivel bearing, 9 is an angle changing cylinder, 10 is a tip hose, 13 is a hose support winch, 14 is a rope, 15 is a hose support hardware, 16 is a frame body, 17
indicates a hinge, and 18 indicates a chain.

Claims (1)

[Scope of utility model registration request] The tip of the concrete transport pipe that runs along the boom is connected to one end of a bent steel tube that is supported at the tip of the boom and is swingable in the front and rear directions, and the tip hose is connected to the other end of the bent steel tube via a swivel bearing. The upper end is rotatably connected, and an angle changing cylinder attached to the tip of the boom is connected to the swivel bearing, and a plurality of frames are stacked vertically on top of each other on the outside of the tip hose. The upper and lower ends on the front side of the bodies are connected so as to be rotatable in the front-rear direction, and the upper and lower ends on the rear side are arranged so as to interfere with each other and are connected with a chain of an appropriate length, so that the body can be bent only in the front direction. A hose support hardware configured to limit the angle is arranged, one end of the hose support hardware is attached to a swivel bearing so as to be able to rotate together with the tip hose, and a hose support winch is attached to the swivel bearing. A support device for a concrete-casting hose, characterized in that the hose is mounted on the winch and the tip of a rope wound around the winch is tied to the other end of the hose support hardware.