JP2011174235A - Concrete pumping vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete pumping vehicle which can reduce costs necessary for transportation so as to lower costs, by surely mixing a material and producing freshly-mixed concrete without depending on resupply of a deficiency of the freshly-mixed concrete from a concrete mixer vehicle. <P>SOLUTION: This concrete pumping vehicle has a vehicle body equipped with a pump 2 which discharges the freshly-mixed concrete, sucked in from a suction port 26 of a tube 22 on the rotational-direction upstream side of a squeeze roller 23, from a discharge port 25 of the tube 22 on the rotational-direction downstream side of the squeeze roller 23. The squeeze roller 23 rotates while squeezing and closing the flexible tube 22 disposed along a circular inner peripheral surface of a housing 21. The vehicle body is provided with a storage tank 41, the bottom of which communicates with the suction port 26 of the tube 22 via a suction pipe 40, and equipped with a mixer device 4 capable of mixing the material by means of a mixing blade 46 rotating on a vertical axis along a wall surface of the storage tank 41, so as to produce the freshly-mixed concrete. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a concrete pump vehicle including a storage tank into which ready-mixed concrete is placed at the rear of a vehicle body.

Conventionally, as this kind of concrete pump truck, a flexible tube is disposed along the inner peripheral surface of the housing whose inner peripheral surface is formed in a circular shape, and both end portions protrude from the housing, and One end of the tube that protrudes out of the housing on the upstream side in the rotation direction of the squeeze roller. It is known that a squeeze pump is mounted on a vehicle body that is more sucked and discharged from the other end of the tube that protrudes out of the housing on the downstream side in the rotation direction of the squeeze roller (see, for example, Patent Document 1). ).
In that case, a screw that rotates about a horizontal axis extending in the lateral direction (vehicle width direction) may be provided in the storage tank, and the fresh concrete put into the storage tank from the concrete mixer truck may be provided by the screw. Agitation is performed so that the ready-mixed concrete flows in the storage tank.

JP 2007-284906 A

However, in the said conventional thing, the ready-mixed concrete discharged by a squeeze pump is dependent on the quantity thrown in from the concrete mixer truck in the storage tank. For this reason, when the remaining small amount (for example, about 0.5 m3) is insufficient at the concrete placement site, it is necessary to transport the shortage again by the concrete mixer truck, which increases the cost.
At this time, it is conceivable that raw materials (concrete, aggregate, water, etc.) are put into the storage tank to produce a shortage of ready-mixed concrete, but the material is stirred with a screw rotating around the horizontal axis in the storage tank. However, it cannot be sufficiently kneaded.

  The present invention has been made in view of the above points, and the object of the present invention is to reliably produce a shortage of ready-mixed concrete again without depending on a concrete mixer truck, and cost required for transportation. It is to provide a concrete pump vehicle that can reduce the cost and reduce the cost.

In order to achieve the above object, in the present invention, a flexible tube is disposed along an inner peripheral surface of a housing having an inner peripheral surface formed in a circular shape, and both end portions protrude from the housing, respectively. A squeeze roller that rotates while squeezing and closing the tube, and the raw concrete sucked from one end of the tube protruding outside the housing on the upstream side in the rotational direction of the squeeze roller is downstream in the rotational direction of the squeeze roller And a concrete pump vehicle in which a squeeze pump that discharges from the other end of the tube protruding outside the housing is mounted on the vehicle body. The vehicle body has a storage tank whose bottom communicates with one end of the tube through a suction pipe, and the raw material is kneaded with blades rotating about the vertical axis along the wall surface of the storage tank. It is equipped with a mixer device that can produce concrete.
Due to this particular matter, a mixer device for producing raw concrete by kneading raw materials with blades rotating around the vertical axis along the wall surface of a storage tank whose bottom communicates with one end of a tube of a squeeze pump via a suction pipe. Because it is mounted on the car body, even if the remaining amount (for example, about 0.5m3) is insufficient at the concrete placement site, the ready-mixed concrete is smoothly generated by the mixer device of the concrete pump car. . Thereby, it becomes unnecessary to depend on the concrete mixer truck again for the shortage of ready-mixed concrete, and it becomes possible to reduce the cost required for transportation and to reduce the cost.

Further, the mixer device is supported so as to be tilted backward with respect to the vehicle body, and one end of the tube is detachably fixed to the suction pipe by a fixing tool, and the mixer is released in a state where the fixing by the fixing tool is released. It is preferable to expose the rear side of the vehicle when the device is tilted backward.
In this case, a regular tube replacement operation of the squeeze pump (for example, every time about 3000 m3 of ready-mixed concrete is discharged) is performed from one end side of the tube exposed to the rear side of the vehicle body when the mixer device is tilted backward. It becomes possible. That is, it is possible to replace the tube by pulling it out from one end side.

  In short, the mixer device that produces raw concrete by kneading the raw material with blades rotating around the vertical axis along the wall surface of the storage tank whose bottom communicates with the one end of the tube of the squeeze pump via the suction pipe By doing so, the concrete equipment of the concrete pump truck smoothly generates the shortage of ready-mixed concrete, and it becomes unnecessary to depend on the concrete mixer truck again for the shortage, thereby reducing the cost required for transportation and reducing costs. Can do.

It is a side view of the concrete pump truck concerning an embodiment of the invention. It is a front view in the state where a pump concerning an embodiment of the invention was partially cut away. It is the perspective view which looked at the mixer apparatus which concerns on embodiment of this invention from diagonally upward. It is a vertical side view which shows the fixation site | part of the end of a tube, and a suction pipe. It is a perspective view which shows the state before fixing the end and suction pipe of FIG. 4 with a fixing tool. FIG. 3 is a diagram corresponding to FIG. 2 according to a modification of the present embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. In addition, the following embodiment is an example which actualized this invention, Comprising: It is not the thing of the character which limits the technical scope of this invention.
First, the schematic configuration of a concrete pump truck according to an embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 1, reference numeral 1 denotes a concrete pump vehicle, and a pump 2, a telescopic boom 3, and a mixer device 4 are mounted on a vehicle body 10 of the concrete pump vehicle 1.

  As shown in FIG. 2, the pump 2 is a squeeze pump, and includes a housing 21 having an inner peripheral surface formed in a circular shape, and a flexible pump disposed along the inner peripheral surface of the housing 21. A tube 22 for extrusion, and squeeze rollers 23 and 23 that rotate in the clockwise direction in FIG. 2 while rolling and clogging the tube 22 along the inner peripheral surface of the housing 21 are provided. Yes. Both end portions of the tube 22 protrude outside the housing 21.

  A lining 24 having substantially the same hardness as the resin constituting each squeeze roller 23 is applied to the inner peripheral surface of the housing 21, and the inner peripheral surface portion of the lining 24 is connected to the tube 22 by each squeeze roller 23. It acts as the inner peripheral surface of the housing 21 to be crushed. Of the two ends of the tube 22, one end of the tube 22 protruding from the housing 21 on the downstream side in the rotation direction of each squeeze roller 23 (upper side in FIGS. 1 and 2) is the discharge port 25. The other end of the tube 22 protruding from the housing 21 is the suction port 26 on the upstream side in the rotational direction of each squeeze roller 23 (the lower side in FIGS. 1 and 2). The suction port 26 is connected to the mixer device 4. The discharge port 25 is connected via a relay pipe 50 to the base end of a transfer hose 5 that pumps ready-mixed concrete to a high place or a predetermined place.

  Each squeeze roller 23 is formed by a rolling wheel 231 having a relatively hard synthetic resin layer on the outer peripheral surface, and is rotated clockwise as shown by an arrow A in FIG. The frame 27 is rotated at a position 180 ° apart from the frame 27 so as to be rotatable via a contact pressure adjusting mechanism 28. .. Are attached to the frame 27 on the downstream side in the rotational direction of the squeeze rollers 23. The guides 271, 271,... I am doing so.

  Further, the distal end of the transfer hose 5 is connected to the proximal end of the proximal end side transfer pipe 51. On the outer peripheral surface of the base end side transfer pipe 51, a distal end side transfer pipe 52 is provided in which the inner peripheral surface is inserted in a stretchable manner in a watertight state. Further, the proximal end of a delivery hose 53 is connected to the distal end of the distal end side transfer pipe 52.

  The boom 3 has a telescopic structure, and includes a base end side ladder 31 and a front end side ladder 32 having an outer peripheral surface inserted through the inner peripheral surface of the base end side ladder 31 so as to be extendable and contractible. The base end of the base end side transfer pipe 51 is fixed to the base end of the base end side ladder 31. The distal end of the distal transfer pipe 52 is fixed to the distal end of the distal ladder 32. That is, the distal end side transfer pipe 52 is expanded and contracted with respect to the proximal end side transfer pipe 51 as the distal end side ladder 32 is expanded and contracted with respect to the proximal end side ladder 31. In this case, the boom 3 is expanded and contracted, tilted in the vertical direction, and swiveled by a pressure pump (not shown) driven by the engine of the concrete pump car 1. The hydraulic motor of the pump 2 is also driven by the pressure pump.

  As shown in FIG. 3, the mixer device 4 includes a bottomed true cylindrical storage tank 41 whose upper portion opens upward as an input port 411. A communication hole 414 that communicates with the suction port 26 of the tube 22 via the suction pipe 40 is provided at the bottom of the storage tank 41. Further, the storage tank 41 is integrally provided with a flange 412 projecting substantially horizontally from the upper edge thereof outward. A flange 413 is integrally provided on the periphery of the flange 412. The turn 413 stands up upward at the rear and left and right edges of the flange 412, and stands up diagonally forward at the front edge. The storage tank 41 is integrally provided with a shaft core member 42 that extends upward from the center of the bottom to the flange 412. The shaft core member 42 accommodates a rotating shaft 47 (vertical axis) extending in the vertical direction along the axis of the shaft core member 42. Furthermore, a bottomed cylindrical power transmission member 43 that is rotatably connected to the upper end of the rotary shaft 47 is fitted over the upper end portion of the shaft core member 42 so as to be slidable in the circumferential direction. On the outer peripheral surface of the power transmission member 43, two arms 44 and 45 projecting radially outward from positions separated from each other by 180 ° and then hanging downward are projected. The lower end of each arm 44, 45, and one of the arms 44 (the left arm in FIGS. 2 and 3) at a substantially intermediate position in the vertical direction, A kneading blade 46 (blade) for kneading raw materials (concrete, aggregate, water, etc.) is fixed.

  Each kneading blade 46 was put into the storage tank 41 by rotating along the wall surface of the storage tank 41 when the arms 44 and 45 were rotated counterclockwise as indicated by the arrow B in FIG. The ready-mixed concrete is kneaded and smoothly flowed, while the ready-mixed concrete raw material charged in the storage tank 41 is efficiently kneaded to generate ready-mixed concrete. As shown in FIG. 2, a driven gear 491 is connected to the lower end of the rotary shaft 47 so as to rotate together. The driven gear 491 meshes with the output gear 492 housed in the gear case 49 together with the driven gear 491. The output gear 492 is integrally connected to an output shaft 481 of a motor 48 attached to the rear side of the bottom of the storage tank 41, and is rotated by a rotational force transmitted from the motor 48 via the output gear 492. The kneading blades 46 are rotated via the rotating shaft 47 and the arms 44 and 45.

  The outer peripheral surface of a thin steel pipe 29 is integrally attached to the inner peripheral surface of the tube 22 on the suction port 26 side. As shown in FIG. 2, the inner end of the steel pipe 29 (the end on the side opposite to the suction pipe 40) is located in the immediate vicinity of the position where the rotating squeeze roller 23 first contacts the tube 22. Further, as shown in FIG. 4, the end of the steel pipe 29 on the suction pipe 40 side extends from the suction port 26 of the tube 22, and a flange 291 having an outer diameter increased at the tip thereof. It is integrally formed. On the other hand, at the end (tip) of the suction pipe 40 on the side of the steel pipe 29, a flange 401 having an outer diameter increased is formed integrally with the flange 291. The flange portion 291 of the steel pipe 29 and the flange portion 401 of the suction pipe 40 are attached to each other by the one-touch joint 6 as a fixture in a state where the flange portions 291 and 401 are laid together and covered with a rubber packing 69. It is fixed.

  As shown in FIG. 5, the one-touch joint 6 has semicircular arc shapes each having a substantially U-shaped enclosing portion 60 that wraps the flanges 291 and 401 and covers the packing 69 from the outside. The two surrounding members 61 and 62 are provided. The surrounding members 61 and 62 are supported so that one end thereof can be freely opened and closed via a hinge 63. Further, a bolt member 65 is rotatably supported on the other end of the surrounding member 61 (on the lower right side in FIG. 5) via a shaft 64, and a nut 66 is screwed to the tip of the bolt member 65. ing. On the other end of the other surrounding member 62 (upper left in FIG. 5), a pair of insertions facing each other with a gap so that the front end side of the bolt member 65 is inserted when the surrounding members 61, 62 are closed. Walls 67 and 67 are projected. The one-touch joint 6 surrounds from the outside in a state where the end portions of the steel pipe 29 on the suction pipe 40 side and the flange portions 291 and 401 on the steel pipe 29 side end of the suction pipe 40 are put together and covered with the packing 69. It is closed by the surrounding members 61, 62, the tip end side of the bolt member 65 is inserted into the gap between the pair of insertion walls 67, 67, and the nut 66 is tightened against the back surface 671 of each insertion wall 67, thereby The parts 291 and 401 are firmly fixed. An extraction bracket 292 is provided between the flange 291 on the steel pipe 29 and the suction port 26 of the tube 22, and this extraction bracket 292 is not shown when the tube 22 is replaced. This is for hooking a hook fed from the winch and pulling the tube 22 together with the steel pipe 29.

  The mixer device 4 moves back and forth in a state where the left and right sides of the vehicle body 10 are tilted forward (for example, about 5 ° to 10 °) with respect to a pair of left and right vehicle body frames 11 (only one is shown in FIG. 1). Are supported via brackets 12 and 13. The upper ends of the brackets 12 and 13 are fixed to the mixer device 4 respectively. Further, the lower end of each rear bracket 13 is rotatably supported by each body frame 11 via a rear pin 14. On the other hand, the lower end of each front bracket 12 is supported via a front pin 15 that can be inserted into and removed from each body frame 11. Further, the mixer device 4 can be tilted rearward around each rear pin 14 by extracting each front pin 15 from each vehicle body frame 11, that is, tilting by lifting the front part upward (for example, tilting by about 10 ° to 20 °). ). The rearward tilting of the front portion of the mixer device 4 is performed by an in-vehicle jack (not shown) interposed between the lower surface of the storage tank 41 and the upper surface of one of the vehicle body frames 11. When the mixer device 4 is tilted backward, the suction port 26 of the tube 22 is exposed to the rear side of the vehicle body, that is, the space 19 immediately behind the suction port 26 of the tube 22 created by the backward tilt of the mixer device 4 (see FIG. 1). Exposed). In this case, the backward tilting of the mixer device 4 is performed in a state where the fixing of the flange portion 291 at the end of the suction pipe 40 of the steel pipe 29 and the flange portion 401 of the end of the suction pipe 40 at the end of the steel tube 29 by the one-touch joint 6 is released. .

  Therefore, in the present embodiment, the kneading blades 46, 46 that rotate about the vertical axis along the storage tank 41 of the mixer device 4 whose bottom communicates with the suction port 26 of the tube 22 of the pump 2 via the suction pipe 40. Since raw material is produced by kneading the raw materials by ..., even if the remaining amount (for example, about 0.5 m3) is insufficient at the concrete placement site, it is insufficient by the mixer device 4 of the concrete pump car 1 Minute raw concrete is produced smoothly. Thereby, it becomes unnecessary to depend on the concrete mixer truck again for the shortage of ready-mixed concrete, and the cost required for transportation can be reduced and the cost can be reduced.

  Further, since the suction port 26 of the tube 22 of the pump 2 is exposed to the space 19 immediately after the mixer device 4 is tilted backward with respect to each vehicle body frame 11, the pump 2 is regularly (for example, about 3000 m3). The replacement work of the tube 22 can be performed from the suction port 26 side of the tube 22 by using the space 19 immediately exposed when the mixer device 4 is tilted backward. That is, even if it is impossible to pull out the tube 22 from the discharge port 25 side by the steel pipe 29, the tube 22 can be pulled out from the suction port 26 side and replaced by using the space 19 immediately after the suction port 26. it can.

  In addition, the inner end of the steel pipe 29 attached to the inner peripheral surface of the tube 22 on the suction port 26 side (the end on the anti-suction pipe 40 side) is in the immediate vicinity of the position where the rotating squeeze roller 23 first contacts the tube 22. Therefore, the ready-mixed concrete sucked from the storage tank 41 of the mixer device 4 via the suction pipe 40 slides better than the tube 22 and does not deform well along the inner peripheral surface of the steel pipe 29 squeeze roller 23. Is smoothly guided to the contact position. For this reason, the aggregate having a large specific gravity in the ready-mixed concrete is smoothly guided to the contact position with the squeeze roller 23 without stagnation on the suction port 26 side of the tube 22, and the separation of the ready-mixed concrete due to the stay of the aggregate is suppressed. The quality is kept good. Thereby, the ready-mixed concrete sucked from the storage tank 41 of the mixer apparatus 4 via the suction pipe 40 can be efficiently discharged by the pump 2 with a good quality.

  Furthermore, since the flange 291 at the end of the steel pipe 29 on the suction pipe 40 side and the flange 401 at the end of the suction pipe 40 on the steel pipe 29 side are fixed by the one-touch joint 6, a hose with one end immersed in a pond or lake water If a flange is provided at the other end of the hose, the flange at the other end of the hose and the flange at the suction pipe side end of the steel pipe can be easily connected with the one-touch joint 6 using the space 19 immediately behind the suction port 26. The pump 2 of the concrete pump car 1 can be used as a pump for pumping up water of a pond or lake water in an emergency or the like. Moreover, the pump 2 of the concrete pump truck 1 can also be used as a pump for pumping out water using the hose in the flooded area.

  In addition, this invention is not limited to the said embodiment, The other various modifications are included. For example, in the above embodiment, the inner end of the steel pipe 29 adhered to the inner peripheral surface of the tube 22 is positioned in the immediate vicinity of the contact position with the squeeze roller 23. As shown in FIG. The inner end of 71 may be formed in a shape conforming to the rotation trajectory of the squeeze roller 23, and the inner end of the steel pipe 71 may be brought close to a limit position where it does not interfere with the squeeze roller 23. In this case, the aggregate in the ready-mixed concrete is more smoothly guided to the contact position with the squeeze roller 23, and the ready-mixed concrete sucked from the storage tank 41 of the mixer device 4 through the suction pipe 40 is transferred by the pump 2. It becomes possible to discharge more efficiently while maintaining good quality.

  Further, in the above-described embodiment, the two arms 44 and 45 projecting outward from the position 180 degrees apart from each other on the outer peripheral surface of the power transmission member 43 and then hanging downward are projected. However, on the outer peripheral surface of the power transmission member, there are three arms projecting radially outward from positions 120 ° apart from each other and then hanging downward, or on the outer peripheral surface of the power transmission member. In this case, four arms that protrude downward in the radial direction from positions 90 ° apart from each other and then hang downward may be provided. In that case, kneading blades for kneading the ready-mixed concrete or the raw material of the ready-mixed concrete put into the storage tank are fixedly installed at the lower end of each arm and in the middle of the arbitrary arm in the vertical direction.

  Furthermore, in the said embodiment, although the communicating hole 414 connected to the suction port 26 of the tube 22 via the suction pipe 40 was provided in the bottom part of the storage tank 41, the shutter which opens and closes this communicating hole was attached, and a storage tank When the raw concrete raw material is kneaded, the communication hole may be closed by a shutter. In this case, the raw material thrown into the storage tank is reliably kneaded by each kneading blade, so that ready-mixed concrete can be effectively produced.

1 Concrete pump car 10 Car body 2 Pump (squeeze pump)
21 Housing 22 Tube 23 Squeeze roller 25 Discharge port (the other end of the tube)
26 Suction port (one end of tube)
4 Mixer device 40 Suction pipe 41 Storage tank 46 Kneading blade (blade)
6 One-touch joint (fixture)

Claims (2)

A flexible tube which is disposed along the inner peripheral surface of the housing whose inner peripheral surface is formed in a circular shape and whose both ends protrude outside the housing, and rotates while crushing and closing the tube. The squeeze roller is provided, and the fresh concrete sucked from one end of the tube protruding out of the housing on the upstream side in the rotation direction of the squeeze roller is other than the tube protruding out of the housing on the downstream side in the rotation direction of the squeeze roller. It is a concrete pump car with a squeeze pump that discharges from the end mounted on the car body,
The vehicle body has a storage tank whose bottom communicates with one end of the tube via a suction pipe, and raw material is kneaded by blades rotating around the vertical axis along the wall surface of the storage tank. A concrete pump truck equipped with a mixer device capable of generating The mixer device is supported so as to be tiltable backward with respect to the vehicle body,
One end of the tube is detachably fixed to the suction pipe by a fixing tool, and is exposed to the rear side of the vehicle body when the mixer device is tilted backward in a state where the fixing by the fixing tool is released. Item 2. The concrete pump car according to Item 1.

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