JP5203013B2 - Concrete pump - Google Patents

Description

  The present invention relates to a concrete pump for supplying fluid concrete (hereinafter referred to as ready-mixed concrete) to a concrete placing site.

A hopper for containing the ready-mixed concrete, one concrete delivery port formed on one side wall of the hopper, and a rotating shaft provided so as to penetrate the other side wall facing the one side wall of the hopper into and out of the hopper , Provided in the hopper, coupled so that the one end opening and the concrete delivery port communicate with each other, the one end opening is rotatable about the center of the concrete delivery port, and the other end opening is swung about the rotation axis. It is formed by a possible concrete feed pipe and an opening that penetrates the other side wall of the hopper into the inside and outside of the hopper, and is provided on the swing trajectory of the other end opening of the concrete feed pipe and communicates with the other end opening of the concrete feed pipe Two concrete inlets and outlets, a cylinder piston device connected to the concrete inlet and outlet outside the hopper, and a piston head in the cylinder piston device A piston drive source that drives forward and backward in a direction approaching the concrete doorway and a direction away from the concrete doorway, a swing drive mechanism that rotates the rotating shaft to swing the other end opening side of the concrete feed pipe, and a swing drive mechanism A concrete pump provided with a rocking drive source is known (see, for example, Patent Documents 1 and 2).
The swing drive mechanism operated by the swing drive source rotates the rotating shaft, and the other end opening of the concrete feed pipe communicates with the two concrete entrances alternately. At this time, the piston drive source of the cylinder piston device connected to the concrete inlet / outlet which is not in communication with the other end opening of the concrete feed pipe drives the piston head away from the concrete entrance / exit, and the concrete feed pipe The piston drive source of the cylinder piston device connected to the concrete inlet / outlet communicating with the other end opening of the cylinder drives the piston head in a direction approaching the concrete inlet / outlet. As a result, the ready-mixed concrete is taken into the cylinder of the cylinder piston device connected to the concrete inlet / outlet which is not communicated with the other end opening of the concrete channel pipe, and communicated with the other end opening of the concrete channel pipe. The ready-mixed concrete that has been taken into the cylinder of the cylinder piston device that is connected to the concrete inlet / outlet is pressed by the piston head and sent into the concrete feed pipe, so that the ready-mixed concrete is supplied to the concrete outlet / concrete supply pipe. To be supplied to the concrete placement site.
Japanese Utility Model Publication No. 58-63371 JP 10-159721 A

According to the above concrete pump, the distance between the concrete feed pipe and the inner bottom of the hopper is increased so as not to hinder the movement of the concrete feed pipe. The ready-mixed concrete that has entered between them is located below the concrete entrance and exit, so that it is not easily taken into the cylinder via the concrete entrance and is easily accumulated and fixed between the concrete feed pipe and the inner bottom of the hopper. If the concrete adheres between the concrete feed pipe and the inner bottom of the hopper in this way, not only the cleaning work inside the hopper becomes difficult, but also the movement of the concrete feed pipe is hindered, and the concrete feed pipe There is a problem that the other end opening of the door cannot be alternately communicated with the two concrete entrances.
The present invention has been made in view of the above problems, and provides a concrete pump that can prevent the concrete from adhering to the inner bottom of a hopper.

The concrete pump according to the present invention penetrates into and out of the hopper through a hopper that stores the ready-mixed concrete, one concrete delivery port formed on one side wall of the hopper, and another side wall that faces the one side wall of the hopper. A rotation shaft that is rotatable about the center of the concrete delivery port as a rotation center axis, and is connected to the one end opening and the concrete delivery port so as to communicate with each other. The other end of the concrete path pipe is formed by an opening that penetrates the other side wall of the hopper into and out of the hopper. Two concrete doorways provided on the swinging trajectory of the end opening and communicating with the other end opening of the concrete feed pipe, and the concrete outside the hopper Cylinder piston device connected to the gate inlet / outlet, a piston drive source for driving the piston head in the cylinder piston device to move forward and backward in a direction approaching the concrete inlet / outlet and away from the concrete inlet / outlet, the other end opening of the concrete feed pipe and the concrete a swing drive mechanism for swinging the other end opening side of the rotated with concrete feed pipe rotation axis in order to communicate the entrance and a swing drive source of the swing drive mechanism, the hopper from a concrete feed pipe Ready-mixed concrete that is connected to the concrete feed pipe so as to protrude in the direction of the inner bottom and swings with the concrete feed pipe about the rotation axis as the center of rotation, and located between the concrete feed pipe and the inner bottom of the hopper. the moving a scraper to prevent sticking of the concrete at the inner bottom portion of the hopper, the scraper is con Attached to hanging around the band and discrete feed pipe and the rotating shaft, wherein the concrete feed pipe is provided with a detent member of the band.
The scraper is also detachably attached to the rotating shaft .

According to the concrete pump of the present invention, the concrete pump is connected to the concrete feed pipe so as to protrude from the concrete feed pipe toward the inner bottom portion of the hopper, and swings with the concrete feed pipe around the rotation axis. A scraper that moves the ready-mixed concrete located between the concrete feed pipe and the inner bottom of the hopper to prevent the concrete from adhering to the inner bottom of the hopper is provided, thus preventing the concrete from adhering to the inner bottom of the hopper. Can do. Accordingly, the cleaning operation in the hopper can be facilitated, and a concrete pump that does not impede the movement of the concrete path pipe can be provided , and the scraper is attached to a band that is wound around the concrete path pipe and the rotating shaft, and the concrete feed is performed. Since the road pipe is provided with the band detent member, rotation of the band in the circumferential direction can be prevented. Therefore, it is possible to easily connect the scraper with the band to the concrete channel pipe of the existing concrete pump without connecting the scraper directly to the concrete channel pipe by welding or bolts, and to stably connect the scraper with the band. It becomes like this.
Since the scraper is detachably attached to the rotating shaft, the scraper can be easily attached and detached during replacement and cleaning .

Best form 1
1 to 6 show the best mode 1, FIG. 1 shows the configuration of the concrete pump, FIG. 2 shows the AA cross section of FIG. 1, and FIG. 3 shows the swing drive mechanism outside the other side wall of the hopper. FIG. 4 shows the configuration of the swing drive mechanism as seen from the direction A in FIG. 3, FIG. 5 shows an enlarged form of the scraper, and FIG. 6 shows the operation of the concrete feed pipe.

  The concrete pump 1 includes a hopper 1a, one concrete delivery port 2, a rotating shaft 3, a concrete feed pipe 4, two concrete entrances 5, a cylinder piston device 6, a piston drive source 7, and a swinging motion. A drive mechanism 80, a swing drive source 8, a control device 9, and a scraper (scraping blade) 10 are provided.

  The hopper 1a is a bottomed ready-mixed concrete container having an opening 11u in the upper part, and includes a side wall 11a that opposes the front and rear, a side wall 11b that opposes the left and right, and a side wall 11c; The bottom wall 11e of the hopper 1a is provided with an opening 12 for cleaning, and the opening 12 is closed by a lid 13 that can be attached to and detached from the bottom wall 11e. In the hopper 1a, a stirring blade 14 for stirring the ready-mixed concrete in the hopper 1a is provided, and a rotation operation shaft 15 of the stirring blade 14 is rotatably supported by the left and right side walls 11c; 11d. An operation portion 56 for rotating the rotation operation shaft 15 is attached to one end of the rotation operation shaft 15 protruding outside the hopper 1a. One concrete delivery port 2 is formed by an opening that penetrates one side wall 11a of the hopper 1a into and out of the hopper 1a.

  The rotary shaft 3 is provided so as to penetrate the other side wall 11b of the hopper 1a into and out of the hopper 1a, and is provided rotatably around the center of the concrete delivery port 2 as a rotation center axis. That is, the rotation center shaft 3 c of the rotation shaft 3 passes through the center 2 c of the concrete delivery port 2.

  A concrete feed pipe 4 called S trunk is provided in the hopper 1a. One end opening 16 of the concrete delivery pipe 4 is coupled to communicate with the concrete delivery port 2, and the one end opening 16 can rotate around the periphery of the concrete delivery port 2 around the center 2 c of the concrete delivery port 2. Formed as follows. For example, in the inner wall of one side wall 11a of the hopper 1a, an annular groove 17 formed in a circumferential shape surrounding the periphery of the concrete delivery port 2 and the peripheral surface of the one end opening 16 of the one end opening 16 of the concrete delivery pipe 4 One end opening 16 of the concrete delivery pipe 4 can rotate around the periphery of the concrete delivery port 2 with the center 2c of the concrete delivery port 2 as the center of rotation by the concave-convex engagement with the annular projection 18 formed in the surrounding circumferential shape. It is installed as such.

The one end opening of the cylinder 19 and the hopper 1 a are coupled so that the one end opening 20 of the cylinder 19 of the cylinder piston device 6 is connected to the inside of the hopper 1 a via the concrete entrance / exit 5. The cylinder piston device 6 includes a cylinder 19 and a piston 21 a including a piston head 21 b that moves while contacting the inside of the cylinder 19 with the inner wall of the cylinder 19.
The piston drive source 7 is realized by a drive source such as a hydraulic drive source that drives the piston head 21b to advance and retreat in a direction approaching the concrete entrance 5 and a direction away from the concrete entrance 5.

  The concrete entrance / exit 5 is formed by an opening that penetrates the other side wall 11b of the hopper 1a into and out of the hopper 1a. The concrete entrance / exit 5 serves as an inlet of the cylinder 19 when the ready-mixed concrete is taken into the cylinder 19 from the hopper 1a and as an exit of the cylinder 19 when the ready-mixed concrete is sent out from the cylinder 19 into the concrete feed pipe 4. Function.

  The other end opening 25 of the concrete feed pipe 4 and the rotary shaft 3 are connected by a connecting member 26, and the other end opening 25 side of the concrete feed pipe 4 is formed so as to be able to swing around the rotary shaft 3 as a rotation center. The connecting member 26 is configured to straddle the rotating shaft 3 from above, and a portion that straddles the outer peripheral surface of the rotating shaft 3 and the outer peripheral surface of the rotating shaft 3 are connected by welding, bolt fastening, or the like. And the lower end part of both the leg parts 27 extended across the rotating shaft 3 and the outer peripheral surface of the concrete delivery pipe 4 are connected by welding, bolt fastening, etc. Therefore, when the rotating shaft 3 rotates, the other end opening 25 side of the concrete feed pipe 4 connected to the rotating shaft 3 by the connecting member 26 swings about the rotation center of the rotating shaft 3. The two concrete entrances 5 are provided on the swing locus of the other end opening 25 of the concrete feed pipe 4.

The swing drive mechanism 80 is a mechanism that rotates the rotary shaft 3 to swing the other end opening 25 side of the concrete feed pipe 4. The swing drive mechanism 80 rotatably supports the connecting member 26 that connects one end of the rotating shaft 3 located inside the hopper 1a and the other end of the concrete feed pipe 4 and the rotating shaft 3. A bearing 28, a cylinder piston device 60, and a link mechanism 30 that connects the other end 3 x of the rotating shaft 3 projecting outside the hopper 1 a and the piston 61 of the cylinder piston device 60 are provided. The bearing 28 is provided inside a through hole formed so as to penetrate the other side wall 11b of the hopper 1a into and out of the hopper 1a, and the rotary shaft 3 is rotatably supported by the bearing 28.
The swing drive source 8 is realized by a drive source such as a hydraulic drive source that drives the piston 61 of the cylinder piston device 60 to advance and retreat.

  As shown in FIG. 3 and FIG. 4, the link mechanism 30 includes a swinging force transmission shaft 33 and a swinging arm 32. In the link mechanism 30, the other end 3 x of the rotating shaft 3 positioned outside the hopper 1 a is connected to the lower end of the swing arm 32, and the upper end of the swing arm 32 and one end 33 x of the swing force transmission shaft 33 are connected. And the other end 33y of the swinging force transmission shaft 33 and the tip 62 of the piston 61 of the cylinder piston device 60 are connected. Therefore, the linear motion of the piston 61 of the cylinder piston device 60 is converted into a force for rotating the rotary shaft 3 via the link mechanism 30 and transmitted to the rotary shaft 3. The casing 63 of the cylinder piston device 60 is attached to the attachment portion 64 so that the swing arm 32 can swing about the rotation shaft 3. That is, the attachment flange 66 is attached to the attachment portion 64 by the attachment shaft 65 so that the casing 63 of the cylinder piston device 60 can rotate around the attachment shaft 65 as indicated by an arrow R.

  The control device 9 is a swing drive source of a swing drive mechanism 80 that swings and drives the piston drive source 7 of the two cylinder piston devices 6 and the concrete feed pipe 4 that are individually connected to the two concrete entrances 5 respectively. 8 is controlled. That is, as shown in FIG. 1, the control device 9 controls the swing drive source 8 to move the piston 61 of the cylinder piston device 60, which is a linear motion mechanism as a force generation unit of the swing drive mechanism 80, back and forth. As a result, the rotational force is transmitted to the rotary shaft 3 via the link mechanism 30, so that the rotary shaft 3 alternately rotates in the forward and reverse directions, so that the other end opening 25 of the concrete passage pipe 4 has two concrete entrances 5. Communicate alternately. At this time, the control device 9 drives the piston head 21b of the cylinder piston device 6 connected to the concrete inlet / outlet 5 which is not communicated with the other end opening 25 of the concrete feed pipe 4 in a direction away from the concrete inlet / outlet 5. The piston head 21b of the cylinder piston device 6 connected to the concrete inlet / outlet 5 which is in communication with the other end opening 25 of the concrete feed pipe 4 is controlled by the concrete inlet / outlet 5 The other piston drive source 7 is controlled to drive in the direction approaching.

That is, as shown in FIG. 6 (a); FIG. 6 (b), the cylinder 19 of the cylinder piston device 6 connected to the concrete entrance / exit 5 which is not in communication with the other end opening 25 of the concrete feed pipe 4. The ready-mixed concrete is taken into the cylinder 19 of the cylinder piston device 6 connected to the concrete inlet / outlet 5 that communicates with the other end opening 25 of the concrete feed pipe 4. It is controlled by the control device 9 so that the operation that the ready-mixed concrete is pressed by the piston head 21b and fed into the concrete feed pipe 4 as indicated by an arrow f2 is repeated alternately. An arrow P indicates the moving direction of the piston.
The ready-mixed concrete delivered to the concrete delivery pipe 4 passes through the concrete delivery outlet 2 and the concrete supply pipe 36 by a pipe connected to the end of the concrete supply pipe 36 connected to the concrete delivery outlet 2 and extending to the site. Sent to the site.

  The scraper 10 is connected to the concrete feed pipe 4 so as to protrude from the concrete feed pipe 4 in the direction of the inner bottom 55 of the hopper 1a, and swings with the concrete feed pipe 4 about the rotation shaft 3 as a rotation center. It is provided in order to prevent the concrete from adhering to the inner bottom 55 by moving the ready-mixed concrete located between the concrete transmission pipe 4 and the inner bottom 55 of the hopper 1a by swinging together with the concrete feeding pipe 4. It is a thing.

  Hereinafter, an example of a connection structure that connects the other end portion 10a of the scraper 10 and the other end opening 25 side of the concrete feed pipe 4 will be described with reference to FIGS. 1 and 5. The connection structure 40 includes a connection band 41 as a band, and left and right projecting plates that protrude from the outer periphery of the pipe on the other end opening 25 side of the concrete feed pipe 4 toward the left side wall of the hopper and the right side wall of the hopper. 42; 42. The left and right projecting plates 42; 42 function as a rotation preventing member for the connection band 41. The connection band 41 includes an upper connection band 43 and a lower connection band 44. The upper connection band 43 is provided so as to further straddle on the connection member 26 provided across the rotation shaft 3, and a band attachment flange 45 is provided at the lower ends of both leg portions 27 extending downward across the strut. . The lower connection band 44 includes a lower left connection band 44a and a lower right connection band 44b. The lower left connecting band 44a is perpendicular to the flat plate portion 46a via the flat plate portion 46a extending along the plane of the left extended plate 42 and the left side edge of the left extended plate 42 from the left side edge of the flat plate portion 46a. And a rising portion 47a extending upward. The lower right connecting band 44b forms a right angle with the flat plate portion 46b via the flat plate portion 46b extending along the plane of the right extended plate 42 and the right edge of the right extended plate 42 from the right edge of the flat plate portion 46b. And a rising portion 47b extending upward. A scraper mounting flange 48 (48a; 48b) is provided on each side edge of the flat plate portion opposite to the side where the rising portion 47 (47a; 47b) is provided in the lower left connecting band 44a and the lower right connecting band 44b. . Therefore, the left and right surfaces of the scraper 10 are sandwiched between the scraper mounting flanges 48 of the lower left connecting band 44a and the lower right connecting band 44b, and the bolt through holes 49a and 49b formed in the scraper mounting flange 48 and the scraper 10 are made to coincide with each other. By fastening the nut 51 from the tip of the bolt 50 through the bolt 50 through the bolt through holes 49a; 49b, the lower left connecting band 44a and the lower right connecting band 44b and the scraper 10 are connected by the bolt 50 and the nut 51. Band mounting flanges 52a and 52b are provided on the upper portions of the rising portions 47 of the lower left connecting band 44a and the lower right connecting band 44b. Therefore, the bolt through holes 53a; 53b formed in both the band attachment flanges 52a; 52b of the upper connection band 43 and the upper band attachment flanges 52a; 52b of the rising portion 47 of the lower left connection band 44a and the lower right connection band 44b. And the nut 51 is fastened from the tip of the bolt 50 by passing the bolt 50 through the bolt through holes 53a and 53b. As a result, the lower left end of the upper connection band 43 and the upper end of the lower left connection band 44a are connected to each other, and the lower right end of the upper connection band 43 and the upper end of the lower right connection band 44b are connected to each other. . The one end 10 b of the scraper 10 and the one end opening 16 side of the concrete feed pipe 4 are connected by a connecting band 90.

According to the connection structure 40 having the above configuration, when the pressure of the ready-mixed concrete is applied to the scraper 10, the left and right projecting plates 42; 42 function as a rotation preventing member for the connection band 41, so that the circumferential direction of the connection band 41 is increased. Prevent rotation. Therefore, the scraper 10 can be easily connected to the concrete passage pipe 4 of an existing concrete pump by the connection band 41 without directly connecting the scraper 10 to the concrete passage pipe 4 by welding or bolts. 41, the scraper 10 can be stably connected.
Since the scraper 10 is detachably attached to the rotating shaft by the connecting band 41, the scraper 10 can be easily attached and detached during the replacement operation and the cleaning operation.
The connecting band 41 enables retrofitting of the scraper 10 to an existing concrete pump.

  The curvature radius of the swing locus r (see FIG. 2) of the lower end of the scraper 10 is smaller than the curvature radius of the curved surface of the inner bottom portion 55 of the hopper 1a located outside the swing locus r of the lower end of the scraper 10. To do. Since the concrete easily adheres to the lowermost position on the curved surface of the inner bottom portion 55 of the hopper 1a, the lower end of the scraper 10 is provided to extend as close as possible to the lowermost position of the inner bottom portion 55 of the hopper 1a. preferable.

According to the concrete pump 1 of the best mode 1, it is connected to the concrete feed pipe 4 so as to protrude from the concrete feed pipe 4 toward the inner bottom 55 of the hopper 1a, and the concrete feed path with the rotary shaft 3 as the center of rotation. Since the scraper 10 that swings together with the pipe 4 is provided, the scraper 10 moves the ready-mixed concrete positioned between the concrete feed pipe 4 and the inner bottom 55 of the hopper 1a to fix the concrete at the inner bottom 55 of the hopper 1a. Can be prevented.
According to the concrete pump 1 of the best mode 1, since the control device 9 is provided, the raw concrete is taken into the cylinder 19 of the cylinder piston device 6 and is taken into the cylinder 19 of the cylinder piston device 6. The operation of feeding the ready-mixed concrete into the concrete channel pipe 4 is alternately and stably repeated, so that the ready-mixed concrete can be stably supplied to the concrete placing site.

Best form 2
It is good also as the concrete pump 1 which is not provided with the control apparatus 9 of the best form 1. FIG. That is, the concrete pump 1 may be configured such that the operator manually operates the piston drive source 7; 7 and the swing drive source 8.

  The scraper 10 may be connected to the concrete feed pipe 4 by welding or bolts.

The longitudinal cross-sectional view of a concrete pump (best form 1). AA sectional drawing of FIG. 1 (best form 1). FIG. 5 is a view of the swing drive mechanism as viewed from the outside of the other side wall of the hopper (best mode 1). The block diagram of a rocking | fluctuation drive mechanism (best form 1). The block diagram which shows the connection structure of a scraper and a concrete delivery pipe (best form 1). Operation diagram of concrete pipe (best mode 1).

Explanation of symbols

1 Concrete pump, 1a hopper, 2 concrete delivery port, 3 rotating shaft,
4 concrete pipe, 5 concrete entrance, 6 cylinder piston device,
7 piston drive source, 8 swing drive source, 9 controller, 10 scraper,
11a One side wall, 11b Other side wall, 16 One end opening, 21b Piston head,
25 Opening at the other end, 55 Inner bottom, 80 Swing drive mechanism.

Claims (2)

A hopper that accommodates the ready-mixed concrete, one concrete delivery port formed on one side wall of the hopper, and a concrete delivery port provided so as to penetrate the inside and outside of the hopper through the other side wall facing the one side wall of the hopper A rotation shaft that can be rotated with the center of the rotation center as a rotation center axis and a one-end opening that is connected to the concrete delivery port so that the one-end opening communicates with the center of the concrete delivery port. The other end opening is formed by a concrete path pipe that can swing around the rotation axis, and an opening that penetrates the other side wall of the hopper into and out of the hopper, and on the swing path of the other end opening of the concrete path pipe Two concrete entrances that are provided and communicate with the other end opening of the concrete pipe, and a cylinder pin connected to the concrete entrance outside the hopper. And tons device, rotate the piston head in the cylinder piston device in order to communicate with the piston drive source for reciprocating drive away from the direction and concrete doorway approaching concrete entrance and the other end opening and the concrete entrance of the concrete feed pipe A swing drive mechanism that swings the other end opening side of the concrete feed pipe by rotating the shaft, a swing drive source of the swing drive mechanism, and the concrete feed pipe so as to protrude toward the inner bottom of the hopper The concrete feed pipe is connected to the concrete feed pipe and swings with the concrete feed pipe with the rotation axis as the center of rotation, thereby moving the ready-mixed concrete located between the concrete feed pipe and the inner bottom of the hopper to move the concrete at the inner bottom of the hopper. wound of a scraper to prevent sticking of concrete subjected to scraper concrete feed pipe and the rotating shaft Attached to the band, concrete pumps, wherein a concrete delivery pipe is provided with a detent member of the band. The concrete pump according to claim 1, wherein the scraper is detachably attached to the rotating shaft .

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