JPS60252505A - Shoot - Google Patents

Abstract

PURPOSE:To prevent a concrete from a swelling in a shoot with a trough having an opening at its apper end by arranging a control board having a concave curved surface in the trough at the side facing the concrete streaming down in the trough. CONSTITUTION:When concrete C is put into a shoot 10, it streams down due to its dead load and hits a control board 14a to be reversed in its moving direction along a curved surface 20. At the same time, since a part of the concrete reaching the upper part of the curved surface along said surface is kneaded once again and is put back downward, the concrete C is prevented from swelling caused by the control board 14a and from overflowing and the stream is contoured with a round M in its cross section. A control board 14b at a down stream, also, reverses the stream and functions as with the control board 14a. Thus, the cencrete can be prevented from swelling.

Description

Detailed Description of the Invention (Technical Field of the Invention) The present invention A relates to a chute for concrete, and particularly relates to a chute with an open upper end.

(Prior art) A chute used for gravity transportation of concrete I in a steeply tilted state is a release chute consisting of a trough with one end open and a flat control plate disposed within the trough. There is a type of chute. This shoe I・deflection suppresses the flow speed of concrete j, l) by the control plate, so the speed −+=
Although it is possible to reduce the separation of material t1 based on the rise, it may overflow to the outside of the concrete or trough by overflowing the embankment of concrete 1)-1 at the control board location, and material separation due to this overflow may occur. do.

(Problems to be Solved by the Invention) To prevent the concrete buildup from occurring,
Measures can be taken such as reducing the concrete flow rate or increasing the size of the trough. However, in the former case, it takes time to transport the concrete and the efficiency of the work decreases.

In addition, the latter method increases the manufacturing cost of the shoe I and is uneconomical.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a chute that prevents concrete from building up.

(Means for Solving the Problem) The present invention provides a chute for concrete, which includes a trough and a control plate disposed within the I-rough, at least a portion of which faces the concrete. one or more control plates having a concave curved surface extending in the longitudinal direction of the control plate.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

The chute ■0 includes a trough 12 and a control plate 14, as shown in the 11th Δ.

In the example of the figure brim, the l/rough 12 is the bottom wall 16 and this bottom wall 1.
6 also consists of a pair of vertically extending side walls 18, which are open at the upper end and formed into a groove shape.

As shown in FIGS. 2 and 3, the control plate 14 has a concave curved surface 20 extending in the longitudinal direction of the trough 1) on at least a portion of the side facing the concrete. That is, as shown in Fig. 3, this curved surface 20 is formed on the side facing the concrete from the lower end of L to the center, with the center part facing outward in the 1/- direction of the water. has been done.

In the example shown in FIG. 4, it is sufficient that the control plate 20 is entirely curved, or at least concave on the side facing the concrete.

The curved surface 20 is curved from the base 22 to the distal end 23 with a round curvature or a different curvature. In an extreme example of the latter case, the curvature of the base 22 can also be formed to be infinite, ie straight. However, the effect of preventing material separation of concrete is that the curved surface 20 is
The J that is provided over the area is high. The curved surface 20 is also provided extending in the longitudinal direction at a vertical portion, for example, at the upper end portion.

The control plate 14 has a pin hole 24.25 below -1- of the base portion 22, and a pin hole 26.27 at the second F of the tip portion 23. Other force, a pair of fludges 28.2 in trough 12
9 is welded, and a hole is attached to this fludge 28.29.
The support plate 34 is taken by -30 and NAND 32 (=
j is being kicked. A hole 36 is provided in the support 34 and the bottom wall 16 of the trough, respectively, at a portion opposite to the pin hole 24, 25.
．． 37 is drilled, and a pin 38.40 inserted through the hole 36.37 is fitted into the pin hole 24.25. The support plate 34 and the bottom wall 16 have a plurality of (three in the example shown in Fig. Hole 4
2.43, the pin 44.46 inserted through the hole 42.43 or fitted into the pin hole 26.27, and the control plate 1
4 is fixed to trough ■2. The mounting angle of the control plate 14 is adjusted by changing the position of the pins 44, 46.

In the example shown in FIG. 1, the i-rough 12 is provided with two control plates: a control plate 14a on the 11-stream side and a control plate 14b on the downstream side spaced from the control plate 14a in the longitudinal direction. ing. These control plates are arranged so that the curved surfaces of the control plates 14a and 14b are alternate and face each other. By providing multiple control plates and alternating their respective curved surfaces, it is possible to apply force surface conversion and kneading to the concrete, as described later, and it is possible to transport the concrete over long distances while suppressing changes in quality. becomes possible. However, the number of control plates can also be one.

The chute 50 shown in FIG. 4 includes a trough 52 and a control plate 54.
It is the first chute 1o and the turn in that it includes the following. However, the trough 52 has a bottom wall 56 in the form of an original plate, and a pair of side walls 58 that are concavely curved and curved in the longitudinal direction, continuing from the bottom wall 56.

According to this chute 50, the cross section of the flowing concrete can be rounded by the pair of side walls 58, and the effect of preventing material separation is further enhanced.

In the small chute 60 shown in FIG. 5, the trough 62 is curved concavely throughout. A control plate 64 is attached to this trough 62.

In the examples shown in FIGS. 4 and 5, the other configurations are
It is a diagram and a rotation.

(7. Stream side action) The chute is used by connecting a plurality of troughs 12 in the longitudinal direction, depending on the concrete transportation site. The connection is achieved by, for example, inserting the downstream end of the upstream trough into the -1-m side end of the downstream trough and connecting them with bolts and nuts.

When concrete C is poured into the chute 10, the concrete flows toward the east direction. Ko/Cree
When 1-C reaches the control plate 14a, the conocrete is reversed and redirected along the curved surface of the control plate 14a.

At the same time, the part of concrete C that reaches above the curved surface is kneaded back toward the top, and further ft.
In Fig. 56, a round outline M is added to the cross section, as shown in Figure 56. When the concrete C reaches the control plate 14b on the downstream side, the concrete 1-C is reversed in the opposite direction to the control plate 14a, and the direction is changed and the concrete is kneaded to form the round shape that was previously formed. A round outline M is attached to a portion different from the outline M. By repeating this process, the concrete flows toward the flow direction, suppressing the separation of forest materials.

Conventionally, as shown in FIG. 7, the control plate provided on the trough 66 is flat, so when the concrete 1-C reaches the control plate 68a, the concrete C is reversed and changes direction. However, the concrete C sometimes swelled up along the control board 68a and overflowed there. Then, a contour S close to a straight line is attached to the concrete C.

When this concrete reaches the downstream control plate 68b, the concrete C is reversed and changes its direction, and at the same time, the contour S or 4=J is cut in a part different from the previously observed contour S, and the concrete The entire area was flowing in a long, flat shape.

As is well known, concrete is a composite (&!aggregate) of many ladle-like substances with different particle sizes, so it is unevenly distributed during flow.
1, and it is known from experience that when the thickness of the partial aggregate becomes less than about twice the maximum aggregate particle size, the material becomes extremely easy to separate. When transporting concrete on steep slopes,
Consisting of a trough 12-like shape shown in FIG.
This is based on the above-mentioned reasons that a so-called flat chute cannot be used, and that in the case of pump pressure feeding, it is recommended that the pipe diameter be at least three times the maximum particle diameter of the concrete.

In view of the empirical facts mentioned below, it can be seen that in the chute equipped with the conventional f-plate-shaped control plate, the material was easily separated. On the other hand, in the present invention, since the control plate has a curved surface on the side facing the conocret, separation of the materials can be suppressed as much as possible by giving the concrete a rounded cross section.

(Experiment example) ')'S As shown in Figure 1, we conducted an experiment in which small plates 10 were connected with a total length of 260 m, installed at a tilt angle of 48°, and used for transporting concrete. −
There was little or no change in the quality of 1. This is J
This is thought to be the result of the curved surfaces of the control plates arranged in L-length differences, which give roundness to the concrete and smooth kneading.

(Effects of the Invention) According to the present invention, the curved surface of the control plate can suppress the rise of concrete at the control plate, and it is possible to prevent the concrete from overflowing. Therefore, there is no need to reduce the concrete flow rate,
Work efficiency never decreases. Further, since only a small amount of effort is required to curve the control plate, it is possible to suppress the increase in cost. Furthermore, since the cross-section of the concrete is given a round profile to prevent the cross-section from becoming flattened, it is possible to transport the concrete without separating the materials using RFF. Furthermore, since the concrete is remixed by the curved surface of the control plate, stable and high quality concrete transportation is possible.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a chute according to the present invention, Fig. 2 is a perspective view of a chute according to the present invention;
, 41 side view showing part of -1-, Figure 3 is 3- of Figure 2
Figures 4 and 5 are perspective views of another example of the chute, and Figures 6 and 7 are schematic diagrams showing the state in which concrete flows. Fig. 6 shows the one according to the present invention, and Fig. 7 shows the conventional one. 10.50.60・Chute, 17.52.62:) Rough, J, 4, 54, 64: Control board, 20・Curved surface,
34 Support plate. Agent Gof Riju Nobuyuki Matsunaga Fig. 1 0 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Izuko Job II;, W December 1980 L I l-1 "f +3 'l, 'J' Secretary Shiga Gakudono 1, 'lR
j's personnel affairs 11i (Japanese 59th year 'f'rA'lW No. 107162 2
, title of the invention, relationship with person/jil who does +1, 3.7ili +i2 Applicant 11-1, 11 Fuku 14. Fukui Prefecture 111 Nakaji 2N”
II No. 6 8 So, '(, Ya (1 [Iri Co., Ltd. /+
1: Kokoro, ■1 Representative: Hito Notani Department 4, Hito 1 (I! Hito 6, Scope of Claims column and Detailed Description of the Invention column 7 of the specification subject to the amendment, Attachment to the contents of the supplement As per the specification in Full Revision 1, however, there are no changes to the content of the amendment except for the fields stated in the column subject to amendment. 8. Attachment,

[Name of the invention] Chute 2, scope of claims] (1) A chute for concrete, comprising a trough,
A control plate disposed within the trough, the trough F
and one or more control plates having a curved surface of at least 21 degrees on the side facing the concrete. (2) The curved surface of the control board is
The chute according to claim 1, wherein the chute extends from two ends to one end. (3) A plurality of the control plates are provided, and the control plates are arranged at intervals in the longitudinal direction of the trough so that the respective curved surfaces are alternated. Shoot as described in. (4) The trough Ti1j has a bottom wall and two side walls connected to the bottom wall, and the inner peripheral surface of each side wall is formed into a concave curved surface that opens on 18 sides of W. The chute according to claim No. (+). 3. DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a chute for concrete, and more particularly to a chute with a trough that is open at one end. (Prior Art) As a chute used for gravity transportation of concrete on a steep slope, there is an open type chute consisting of a trough with an open upper end and a control plate in the form of an original plate disposed within the trough. According to this chute, since the flow rate of concrete is suppressed by the control plate, it is possible to reduce the separation of materials due to the increase in speed, but on the other hand, the control plate causes a mound of concrete and the concrete overflows to the outside of the trough. There is a thing. (Problems to be Solved by the Invention) In order to prevent the concrete from rising, measures such as reducing the flow rate of concrete or increasing the size of the trough can be taken. However, in the former case, concrete 1
・Transportation takes time, reducing work efficiency. Moreover, in the latter case, the manufacturing cost of the chute becomes high, making it uneconomical. Therefore, it is an object of the present invention to provide a chute that prevents concrete build-up. (Means for Solving the Problem) What has yet to be invented is a chute for concrete, which includes an I-rough and at least one side facing the concrete arranged in the l-rough and flowing through the trough. and one or more control plates each having a partially concave curved surface. (Example) Examples of the present invention will be described above with reference to the drawings. 1-1, 10 includes a trough 12 and a control plate 14 (14a, 14b), as shown in FIG. In the illustrated example, the trough 12 is connected to a bottom wall 16 and this bottom 'L"r.
It consists of a pair of side walls 18 that extend perpendicularly from 16, and is formed into a groove shape with the upper end open. As shown in FIGS. 2 and 3, the control board 14 has a concave curved surface 2 on at least a part of the side facing the concrete.
has 0. That is, as shown in FIG. 3, this curved surface 20 is arranged so that on the side facing the concrete, from the upper and lower ends to the center, the center part is outward in the horizontal direction, that is, the control plate 14 is formed so that the entire area from the upper end to the C end is concave when viewed in longitudinal section. In the illustrated example, the entire control plate 20 is formed to be curved, but at least a portion of the control plate 20 is formed in a concave shape on the side facing the concrete. The curved surface 20 is curved from the base 22 to the distal end 23 with the same curvature or different curvatures. In an extreme example of the latter case, the curvature of the base portion 22 can also be formed to be infinite, ie straight. However, the effect of the concrete material separation prevention 11- is that the curved surface 20 extends from the base 22 to the tip 2.
It is more expensive to have three sections. The curved surface 20 also has
The control plate 14 may be provided at a portion in the vertical direction, for example, at one end portion of the −1 end, in the longitudinal direction of the control plate 14 . The control plate 14 has bottle holes 24 and 25 below the base 22 and bottle holes 26 and 27 at the top of the tip rg 23, respectively. On the other hand, on the trough 12 - a pair of flanges 2
8.29 is welded to the flange 28.29, and a support plate 34 is attached to this flange 28.29 by means of pins 30 and nuts 32. of this support plate 34 and of the bottom wall 16 of the trough. Holes 36. are provided at portions facing the bottle holes 24.25, respectively.
37 is opened, and the bottle 3B, 4.0 inserted through the hole 36.37 is fitted into the bottle hole 24.25. The support plate 34 and the bottom wall 16 are connected to the control plate 14
When the is swung around the ihl+ line of the pin 38.40, the pin hole 26.27 provided in the tip portion 23 of the control plate 14
θ of the circular arc locus 1- drawn by θ2 and 43 have correspondingly paired holes 42 and 43, and in the illustrated example, there are three pairs of holes 4.
It has 2°43. A pin 44.4S inserted through the holes 4.2 and 43 is fitted into the pin hole 26.27, and the control plate 14 is fixed to the trough 12. control plate 111] 4 (=J angle is adjusted by changing the position of the bins 44 and 46. In the example shown in Fig. 1, the trough 12, the control plate 14a on the J-stream side Two control plates are provided from this control plate 14a to a control plate 14b on the downstream side spaced apart from each other in the longitudinal direction of the trough 12.These control plates include control plate 1.4a.
The curved surface of the control plate 1.4b and the curved surface of the control plate 1.4b are arranged to face each other with a difference of η. By providing multiple control boards and making the curved surfaces of each one different, it is possible to change the direction and knead, as will be described later in Concrete 1, while suppressing changes in quality. , long-distance transportation becomes possible. However, the number of control plates can also be one. The chute 50 shown in FIG. 4 includes a trough 52 and a control plate 54.
However, the trough 52 has a flat bottom wall 56, and a pair of concavely curved holes extending in the longitudinal direction of the trough 52, which are connected to the bottom wall 56. It has a side wall 58. Each inner circumferential surface of the pair of side walls 58 is a concave curved surface that opens toward the inner circumferential surface of the other side wall 58 facing each other. According to this chute 50, the cross section of the flowing concrete can be rounded by the pair of side walls 58, which further increases the effect of preventing material separation. In the chute 60 shown in No. 514, the trough 62 is entirely curved in a concave shape. A control plate 64 is attached to this trough 62. In the examples shown in FIGS. 4 and 5, the other configurations are
Same as the figure. (Operation of the embodiment) The chute is used by connecting a plurality of troughs 12 in the longitudinal direction depending on the concrete transportation site. For example, the connection is made by inserting the downstream end of the upstream trough into the upstream end of the downstream trough and connecting them with bolts and nuts. When concrete C is poured into the chute 10, the concrete flows downstream due to gravity. When the concrete C reaches the control plate 14a, the concrete reaches the control plate 1
It is reversed and the direction is changed along the curved surface of 4a. At the same time, since the part of the concrete C that reaches above the curved surface is kneaded in the direction, the concrete C is prevented from rising on the control plate 14a.
This prevents the concrete (C) from bubbling due to this swelling, and furthermore, as shown in FIG. 6, a round outline M is added to the cross section of the concrete (C). Concrete c is next downstream control plate 14
When reaching point b, the concrete 1-C is reversed in the direction opposite to that of the control plate 14a, and the direction is changed and it is kneaded again, thereby forming a mound of concrete C in the same manner as in step 4a. The rounded contour M can be seen in a different part from the rounded contour M that was previously applied. As this process is repeated, the concrete flows downstream. Conventionally, as shown in FIG. 7, the control plate provided on the trough 66 is flat, so when the concrete c reaches the control plate 68a, the concrete 1-C is reversed and changes direction. However, the concrete C piled up in the -L direction along the control plate 68a, and sometimes overflowed here. Then, a contour S close to a straight line is attached to the concrete C. When this concrete reaches the downstream control plate 68b, the concrete C is reversed and changes its direction, and at the same time a contour S is attached to a part different from the previously attached contour S, and the concrete is It was flowing in a long flat shape. As is well known, concrete 1 is a composite (mixture) of many granular materials with different particle sizes, so it becomes flat during flow, and the thickness of the flat is approximately twice the maximum aggregate particle size. It is known from experience that the materials become extremely easy to separate when the temperature is below. When transporting concrete on steep slopes, it is impossible to use a so-called flat chute, which has a shape like the trough 12 shown in Fig. Considering the above reasons and the empirical facts of leather fittings, it is recommended that in a chute equipped with a conventional flat control plate, the flowing concrete [] is in the area where the control plate is installed. It can be seen that it was easy to overflow and the concrete or material was easy to separate. In contrast, in the shoe 1-10 according to the present invention, the control plate is provided with a curved surface on the side facing the concrete, so that the concrete flowing through the shoe 1 is not disposed in the area where the control plate is provided, as in the conventional case. There is no large build-up, no sagging of the concrete due to this build-up, and furthermore, the concrete can have a round profile cross-section, and material separation is suppressed as much as possible. (Experiment example) An experiment was conducted in which the shoes 1-10 shown in Figure 1 were connected for a total length of 260 m and installed at a location with an inclination angle of 48° to transport concrete. Almost no changes occurred. This is thought to be the result of the curved surfaces of the control plates arranged in an alternating manner to give a round shape to the concrete and smooth kneading. (Effects of the Invention) According to the present invention, the curved surface of the control plate can suppress the buildup of concrete at the control plate, thereby preventing concrete from overflowing. Therefore, there is no need to reduce the flow rate of concrete, and work efficiency will not be reduced. Further, since only a small amount of effort is required to curve the control plate, the increase in cost can be suppressed. Furthermore, since the cross section of the concrete is given a round outline to prevent the cross section from becoming flat, it is possible to transport the concrete without separating the materials. Furthermore, since the concrete is mixed by the curved surface of the control plate, stable and high quality concrete 1 can be transported. 4. Brief description of the drawings Figure 1 is a perspective view of the chute according to the present invention, Figure 2 is a plan view showing a part of the chute, and Figure 3 is a cut along line 3-3 in Figure 2. A sectional view, FIGS. 4 and 5 are perspective views showing another example of the chute, and FIGS. 6 and 7 are schematic views showing a state in which concrete flows, and FIG. 6 is a chute according to the present invention. FIG. 7 shows a conventional one. 10.50, 60: Chute, 12.52.62: Trough, 14.54, 64: Control plate, 20: Curved surface, 34: Support plate. Agent Patent Attorney Nobuyuki Matsunaga

Claims (4)

[Claims] (1) Concrete 1/river chute, including a trough and a control board disposed within the trough, at least a portion of which faces the concrete/cre 1/river in the longitudinal direction of the trough. one or more control plates having a concave curved surface extending into the chute. (2) The chute according to claim 1, wherein the curved surface of the F+ control plate is located in a lateral direction of the concrete. (3) A plurality of said control plates are provided, and these fl control plates are arranged so that their respective curved surfaces are different from each other.
The chute according to claim 2, wherein the chute is arranged at intervals in the longitudinal direction of the rough. (4) The rough has a bottom wall and two side walls connected to the bottom wall, and the inner peripheral surface of each side wall is formed into a concave curved surface extending in the long direction of the trough. A chute according to claim (1).