JP2007023624A - Concrete pipe switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete pipe switching device which has only a small footprint, exerts good workability, and easily copes with movement of a form. <P>SOLUTION: The concrete pipe switching device 8 is formed of: an inlet port 35 to which a concrete supply pipe 7 is connected; a plurality of outlet ports 15 which are arranged on the same circumference, and to which concrete distribution pipes 6 are connected, respectively; and a rotatively driving device 50 for rotating the inlet port 35 and selectively switching connection of the same to one of the outlet ports 15. The inlet port 35 is connected via a joint pipe 60 to a concrete supply pipe 7. The joint pipe 60 curvedly extends such that an edge close to the concrete supply pipe 7 is aligned with a rotating axis (x), and therefore the joint pipe 60 is rotatably connected to the concrete supply pipe 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pipe switching device that switches connection of pipes for sending ready-mixed concrete at a site where concrete is placed in a formwork.

  When placing ready-mixed concrete using a concrete pump in a formwork installed at a construction site, as shown in FIG. 5 (a), a plurality of pieces arranged toward each part in the formwork It is necessary to connect the concrete distribution pipe 6 with a concrete supply pipe 7 which is alternatively a supply base of ready-mixed concrete, while sequentially switching. For this reason, conventionally, the connection has been manually switched as needed.

However, it is troublesome to manually switch the connection every time as described above. For this reason, a concrete shunt 90 such as the conventional example (Patent Document 1) shown in FIG. This concrete diverter 90 includes an inlet port 93 to which the concrete supply pipe 7 is connected, and a plurality of outlet ports 91 that are arranged in a straight line in a horizontal row and to which each concrete distribution pipe 6 is connected. By driving the inlet port 93 upward, the connection between the inlet port 93 and the outlet port 91 is switched.
JP 7-91192 A

  However, in the concrete diverter 90, since the outlet ports 91 are arranged in a horizontal line, the space occupied by the apparatus is large and workability is poor. Moreover, since the concrete supply pipe 7 moves laterally, it is difficult to cope with the movement of the mold.

  Therefore, an object of the present invention is to provide a concrete pipe switching device that has a small occupation space and good workability, and that can easily cope with the movement of a formwork.

  In order to achieve the above object, the concrete pipe switching device of the present invention includes an inlet port to which a concrete supply pipe is connected, a plurality of outlet ports that are arranged on the same circumference and to which a concrete distribution pipe is connected, and A rotary drive device that selectively switches the inlet port to the outlet port by rotating the inlet port.

  The inlet port may be directly connected to the concrete supply pipe, but is connected to the concrete supply pipe via a connection pipe, and the connection pipe has an end on the concrete supply pipe side positioned on the axis of rotation. It is preferable to bend and extend so as to be connected to the concrete supply pipe so as to be rotatable. By doing so, even when the inlet port is rotated, the connecting pipe only rotates around the connecting portion with the concrete supply pipe, and the concrete supply pipe itself is not moved.

  The mutual connection relationship between the inlet port, the outlet port and the rotary drive device is not particularly limited, but the inlet port is attached to a turntable that is rotatably supported, and the outlet port is attached to a fixed platen. In addition, it is preferable that the rotation driving device rotationally drives the rotating disk. The configuration of the rotational drive device is not particularly limited, and examples thereof include a combination of a drive motor and a chain, a combination of a drive motor and a belt, and a combination of a drive motor and a gear. And when it is the combination of the said drive motor and a chain, although the said rotation disk is not specifically limited, It is preferable to provide the sprocket for attaching the said chain to the outer peripheral part. Moreover, although the said rotation drive device is not specifically limited, It is preferable to provide the limit apparatus for stopping the said inlet port correctly in the position where the said outlet port exists. The rotation may be rotation in only one direction, but is preferably rotation in both directions of the forward direction and the reverse direction.

  Moreover, although the said concrete piping switching device is not specifically limited, It is preferable to provide the pressing member which gives a pressing force to the contact part of the said inlet port and the outlet port connected to this. This is because even when the contact portion is worn, the wear is absorbed by the pressing force to prevent generation of a gap and prevent leakage of the concrete. Examples of the pressing member include, but are not limited to, various springs such as a disc spring and a coil spring, and various fluid pressure cylinders such as a hydraulic cylinder and an air cylinder.

  Although the said contact part is not specifically limited, It is preferable to be comprised by the entrance side contact plate provided in the entrance side, and the exit side contact plate provided in the exit side. Furthermore, the inlet-side contact plate and the outlet-side contact plate are not particularly limited, but are preferably attached to the rotating plate and the fixed plate in a replaceable manner, respectively. By doing so, even if the wear of the contact portion progresses and the generation of the gap cannot be prevented by the pressing force alone, it can be dealt with only by replacing the contact plate. Although the material of the said entrance side contact plate and the said exit side contact plate is not specifically limited, Various metals, such as carbon steel, Various resin, such as a fiber reinforced resin, Ceramics, etc. are illustrated.

  In addition, the concrete pipe switching device is not particularly limited, but rotates around the circumference in conjunction with the inlet port, and when the inlet port is connected to one outlet port, the other outlet ports It is preferable to provide a cleaning port connected to. This is because such a cleaning port is efficient in cleaning the concrete distribution pipe.

  According to the present invention, since the outlet ports are arranged on the same circumference, the space occupied by the apparatus is small and the workability is good as compared to arranging the outlet ports on a straight line. In addition, the concrete supply pipe does not move if it is rotated instead of laterally moved or if the connecting pipe is used, so that it is easy to cope with the movement of the formwork.

  The concrete pipe switching device 8 of the present invention includes an inlet port 35 to which the concrete supply pipe 7 is connected, a plurality of outlet ports 15 provided on the same circumference and connected to the concrete distribution pipe 6, and an inlet port 35. And a rotary drive device 50 that selectively switches the inlet port 35 to the outlet port 15 for connection. The inlet port 35 is connected to the concrete supply pipe 7 via a connection pipe 60, and the connection pipe 60 is bent and extended so that the end on the concrete supply pipe 7 side is located on the axis of rotation x. The supply pipe 7 is rotatably connected. The inlet port 35 is attached to a turntable 30 that is rotatably supported, the outlet port 15 is attached to the fixed platen 10, and the rotation driving device 50 drives the turntable 30 to rotate.

  The concrete pipe switching device 8 shown in FIGS. 1 to 3 of the present embodiment selectively connects one concrete supply pipe 7 to one of a plurality of concrete distribution pipes 6 and, if necessary, This is a device for switching the connection to another concrete distribution pipe 6. However, in FIG. 3B, illustration of the connecting pipe 60 is omitted for simplification.

  The concrete pipe switching device 8 includes a stationary platen 10 to which a plurality of outlet ports 15 to which the concrete distribution pipe 6 is connected are attached on the same circumference, and a rotation to which an inlet port 35 to which the concrete supply pipe 7 is connected is attached. It includes a panel 30 and a rotation driving device 50 that selectively connects the inlet port 35 to the outlet port 15 by rotationally driving the rotating disk 30. Each of these components is supported by a base frame 9 that extends to the lower part of the apparatus.

  The stationary platen 10 is a plate-like member provided with an enclosure 10a projecting to the surface side at the outer peripheral portion, which is attached to the base frame 9 while standing in the vertical direction. A rotating plate 30 is slidably mounted on the surface side of the fixed platen 10, and an outlet side contact plate 20 is attached to a portion where the rotating plate 30 is in sliding contact. Further, from the back surface, a plurality of outlet ports 15 are attached so as to pass through the fixed platen 10 and be connected to the outlet-side contact plate 20 on the front surface.

  Specifically, the fixed platen 10 includes a rotary shaft 11 that pivotally mounts the rotary plate 30 on the surface side, and the rotary plate 30 is fixed between the tip of the rotary shaft 11 and the rotary plate 30. A pressing member 12 for pressing is attached. The pressing member 12 is a disc spring, and is fixed by inserting a male screw 11a formed at the tip of the rotary shaft 11 and screwing a nut 11b into the male screw 11a. Further, an attachment hole 13 for inserting and attaching the end of the outlet port 15 is provided on the same circumference around the rotation shaft 11 of the stationary platen 10. In addition, a plurality of screw holes 14 for fixing the outlet side contact plate 20 with screws 29 are provided in a plurality of locations on the surface.

  Each of the outlet ports 15 is a straight pipe and there are four pipes, and the end connected to the inlet port 35 is fixed to the mounting hole 13 of the stationary platen 10. The outlet-side contact plate 20 is a replaceable disk-shaped member made of carbon steel (for example, S45C), and a shaft hole 21 through which the rotary shaft 11 and the bearing 31 of the rotary disc 30 are inserted passes through the center. Each communication hole 23 is provided in the portion of the fixed platen 10 that overlaps the mounting hole 13 and communicates with the opening of each attached outlet port 15. In addition, the outlet side contact plate 20 is provided with a plurality of screw through holes 24 that are fixed to the surface of the stationary platen 10 with screws 29.

  The rotating disk 30 is a disk-shaped member provided with an enclosure 30 a that is pivotally attached to the rotating shaft 11 and protrudes to the surface side on the outer peripheral portion. The turntable 30 is a member that rotates while the back surface is in sliding contact with the outlet side contact plate 20 of the stationary platen 10, and an inlet side contact plate 40 is attached to the sliding contact portion. Further, from the surface side of the turntable 30, a single inlet port 35 and a plurality of cleaning ports connected to the other outlet ports 15 when the inlet port 35 is connected to one outlet port 15. The port 36 is attached in such a manner that it passes through the turntable 30 and is connected to the inlet-side contact plate 40 on the back surface.

  Specifically, the rotating disk 30 includes a bearing 31 for inserting the rotating shaft 11 in the center, and a cap 31a having a hole for inserting the male screw 11a is fitted to the tip portion of the bearing 31. ing. Further, the rotary disk 30 is formed with a driven sprocket 32 for attaching a chain 53 of the rotation drive device 50 on the outer peripheral portion. Further, on the same circumference inside the sprocket 32, each mounting hole 33 for inserting and mounting the end of the inlet port 35 or the cleaning port 36 is penetrated. In addition, a plurality of screw holes (not shown) for fixing the inlet side contact plate 40 with screws 49 are provided in the back surface of the rotating disk 30.

  The inlet port 35 is a pipe extending in a straight line. The end connected to the outlet port 15 is fixed to the mounting hole 33 of the rotating disk 30, and the connecting pipe 60 is connected to the opposite end. . The cleaning port 36 is a pipe used for cleaning the concrete distribution pipe 6, and there are three pipes, which extend slightly shorter than the inlet port 35 in a straight line. Each cleaning port 36 is fixed to each mounting hole 33 of the turntable 30 at the end connected to the outlet port 15. The inlet-side contact plate 40 is a replaceable disk-shaped member made of carbon steel (for example, S45C), and a shaft hole 41 through which the rotation shaft 11 and the bearing 31 are inserted penetrates the center. Each of the communication holes 43 communicating with the attached inlet port 35 or the opening of each of the cleaning ports 36 is provided in a portion overlapping the mounting hole 33 of the panel 30. In addition, the inlet side contact plate 40 is provided with a plurality of screw through holes 44 that are fixed to the back surface of the rotating disk 30 with screws 49.

  The rotational drive device 50 is a device that rotationally drives the turntable 30 in both directions of the forward direction F and the reverse direction R, and includes a drive motor 51 serving as a power source arranged side by side on the turntable 30 and a shaft thereof. A driving sprocket 52 attached to the tip and a chain 53 spanned between the driven sprocket 32 are included. The rotary drive device 50 is provided with a limit device (not shown) for accurately stopping the inlet port 35 at a position where the outlet port 15 is located. By pressing (not shown), it is possible to automatically stop at that position.

  The connecting pipe 60 is a member interposed between the concrete supply pipe 7 and the inlet port 35 and is bent so that the end on the concrete supply pipe 7 side is located on the axis line x when the turntable 30 rotates. And is connected to the concrete supply pipe 7 in a rotatable manner. More specifically, the connecting pipe 60 is a pipe whose bent shape is maintained, and includes a base 61 that extends substantially straight from an end on the concrete supply pipe 7 side to an intermediate part, and a tip of the base 61. A bent portion 62 that is bent and extends, and a tip portion 63 that is bent from the distal end of the bent portion 62 and extends substantially parallel to the base 61 again. And it is rotatably supported by the connection pipe support part 69 attached to the base frame 9 in the state which match | combined the center line of the base 61 with the axis line x when the turntable 30 rotates.

A state in which concrete is placed in the mold using the concrete pipe switching device 8 while switching the connection of the concrete supply pipe 7 to each concrete distribution pipe 6 will be described below.
(1) First, the concrete supply pipe 7 is connected to the connecting pipe 60, and each concrete distribution pipe 6 is connected to each outlet port 15.
(2) Next, the concrete distribution pipe 6 for supplying the ready-mixed concrete is selected, and the inlet port 35 and the turntable 30 are rotated together with the outlet port 15 to which the pipe is connected. At this time, since the rotation driving device 50 includes the limit device, the inlet port 35 can be automatically and accurately stopped at the position of the selected outlet port 15 simply by pressing the push button.
(3) Then, the ready-mixed concrete is supplied and the placing work is performed.
(4) After placing in this way, by repeating the operations (2) and (3) again, the ready-mixed concrete is placed in order in the formwork.

Next, after performing the above-described placing operation, as shown in FIG. 4, a state in which the concrete distribution pipe 6 is washed will be described below.
(1) First, the casting side end of the concrete distribution pipe 6 is separated from the formwork.
(2) Next, after scraping the concrete accumulated on the cleaning port 36 side, a sponge 75 is inserted, and an air lid 70 provided with an air valve 71 is attached to the end of the cleaning port 36. Fix with 72.
(3) Next, after connecting the air hose 73 to the air valve 71, the air valve 71 is opened, and the sponge 75 is discharged together with the residual concrete from the separated end.
In the cleaning operation, contrary to the above, an air lid 70 and an air hose 73 may be connected to the end on the separated side, and residual concrete may be discharged from the cleaning port 36 side.

  According to this embodiment, since the outlet ports 15 are arranged on the same circumference, the space occupied by the apparatus is small and the workability is good as compared to arranging the outlet ports 15 in a straight line. Also, when the inlet port 35 rotates, the connecting pipe 60 only rotates around the connecting portion with the concrete supply pipe 7 and the concrete supply pipe 7 itself is not moved. It is easy to cope with the movement, and there is no fear that the concrete supply pipe 7 is bent or twisted when switching the connection.

  In addition, since the pressing member 12 is provided, even when the contact plates 20 and 40 constituting the contact portion between the fixed platen 10 and the rotating plate 30 are worn, the wear is absorbed by the pressing force to prevent generation of a gap. Prevents leakage of concrete. Furthermore, since both the contact plates 20 and 40 can be replaced, even if the wear of the contact portion progresses and the generation of the gap cannot be prevented by the pressing force alone, it can be dealt with only by replacing the contact plates. . In addition, since the cleaning port 36 is provided, the concrete distribution pipe 6 can be cleaned while being connected to the outlet port 15.

  In addition, this invention is not limited to the said Example, It can change suitably in the range which does not deviate from the meaning of invention, and can also be embodied, for example, makes the connecting pipe 60 flexible. Also good.

It is a whole perspective view which shows the concrete piping switching apparatus of the Example of this invention. It is a disassembled perspective view which shows the concrete piping switching apparatus of the Example. (A) which shows the concrete piping switching device of the Example is a side view, (b) is a front view. It is a perspective view which shows the mode at the time of wash | cleaning the concrete distribution piping of the Example. (A) is a perspective view which shows the mode of connection switching of piping, (b) is a perspective view which shows the concrete diversion apparatus of a prior art example.

Explanation of symbols

6 Concrete distribution pipe 7 Concrete supply pipe 8 Concrete pipe switching device 10 Fixed platen 11 Rotating shaft 12 Press member 15 Outlet port 20 Outlet side contact plate (contact part)
30 Rotary plate 35 Inlet port 36 Cleaning port 40 Inlet side contact plate (contact part)
50 Rotation drive device 60 Connecting tube x Rotation axis

Claims (7)

  An inlet port to which the concrete supply pipe is connected, a plurality of outlet ports arranged on the same circumference and connected to the concrete distribution pipe, and the inlet port is selected as the outlet port by rotating the inlet port. A concrete pipe switching device provided with a rotary drive device that is switched and connected.   The inlet port is connected to the concrete supply pipe via a connecting pipe, and the connecting pipe is bent and extended so that an end on the concrete supply pipe side is located on the axis of rotation, and the concrete supply pipe The concrete pipe switching device according to claim 1, wherein the concrete pipe switching device is connected to be rotatable.   The said entrance port is attached to the turntable supported so that rotation is possible, the said exit port is attached to a stationary platen, The said rotation drive device rotationally drives the said turntable. The concrete piping switching device as described.   The concrete piping switching device according to any one of claims 1 to 3, further comprising a pressing member that applies a pressing force to a contact portion between the inlet port and an outlet port connected thereto.   The concrete pipe switching device according to claim 4, wherein the contact portion includes an inlet side contact plate provided on the inlet side and an outlet side contact plate provided on the outlet side.   The concrete pipe switching device according to claim 5, wherein the inlet-side contact plate and the outlet-side contact plate are attached to the rotating plate and the fixed plate, respectively, in a replaceable manner.   The concrete pipe switching device rotates on the circumference in conjunction with the inlet port and is connected to the other outlet port when the inlet port is connected to one outlet port. The concrete piping switching device according to claim 1, comprising:

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