JP2012241401A - Installation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation apparatus that can be placed even in a narrow working space.SOLUTION: An installation apparatus B is provided that is used when a reinforcement cage A formed by laterally laying a plurality of auxiliary members 3,3,... across a plurality of vertical reinforcements 1,1,... is installed in an excavated hole H. The installation apparatus B includes a first support member 21 and a second support member 31 that each are selectably positioned between a support position at which the auxiliary members 3 can be supported and a retreat position at which the reinforcement cage A is not interfered; a first forward/backward movement actuator 23 causing the first support member 21 to reciprocate between the support position and the retreat position; a second forward/backward movement actuator 33 causing the second support member 31 to reciprocate between the support position and the retreat position; and a lifting and lowing actuator 41 lifting and lowering the first support member 21. The first forward/backward movement actuator 23 is disposed below the first support member 21 while the second forward/backward movement actuator 33 is disposed above the second support member 31.

Description

  The present invention relates to an erection device that is used when a reinforcing bar is erected.

  Patent Document 1 discloses a method using an erection device as a method of erection of reinforcing bars of piles and underground continuous walls in excavation holes. The built-in device of Patent Document 1 includes an operation pin and a holding pin arranged vertically. When a reinforcing bar is installed, the operating pin is locked to the reinforcing bar and the operating pin is lowered in this state.

Japanese Patent No. 4097242

  In the built-in device of Patent Document 1, the operating pin is moved forward and backward using an actuator made of a hydraulic cylinder, but the actuator is provided on the rear side of the operating pin (the operating pin and the actuator are arranged in series). The depth dimension of the unit composed of the operating pin and the actuator becomes large, and the downsizing of the built-in device may be hindered.

  From such a viewpoint, an object of the present invention is to provide a built-in device that is used when a reinforcing bar is built, and that can be reduced in size.

  An erection device according to the present invention that solves the above problem is an erection device that is used when a reinforcing bar made by horizontally laying a plurality of auxiliary members on a plurality of vertical bars is built in an excavation hole, A first support member and a second support member capable of selecting a support position that can support the auxiliary member and a retract position that does not interfere with the reinforcing bar rod, and the first support member between the support position and the retract position A first advancing / retreating actuator that reciprocates; a second advancing / retreating actuator that reciprocates the second support member between the support position and the retracted position; and a lift actuator that moves the first support member up and down. The first advance / retreat actuator is disposed above or below the first support member, and the second advance / retreat actuator is disposed above or below the second support member. To do.

  According to the present invention, the first support member and the first advance / retreat actuator overlap vertically, and the second support member and the second advance / retreat actuator overlap vertically. Compared with the case where it is arranged behind the support member, the depth dimension can be reduced.

  When the mounting device is equipped with a first holder for holding the first support member and a second holder for holding the second support member, the first support member is attached to the first holder. And the second support member may be passed through the second holder. When the support member is moved to the support position, the amount of protrusion at the front of the support member (the amount of protrusion from the front end of the holder) increases, and the support member front becomes like a cantilever. Then, even when the support member is moved to the support position, the entire holder can support the intermediate portion of the support member, so that it is possible to stably support the support member in a state where the weight of the reinforcing bar is applied. It becomes.

  When the first advance / retreat actuator includes a first rod that can advance and retreat, and the second advance / retreat actuator includes a second rod that can advance and retreat, the first rod is the first rod. The support member may be connected to a portion protruding from the rear end of the first holder, and the second rod may be connected to a portion of the second support member protruding from the rear end of the second holder. In other words, the advancing and retreating directions of the first support member and the first rod may be reversed, and the advancing and retreating directions of the second support member and the second rod may be reversed. In this way, it is possible to make the amount of protrusion of the front part of the support member when the support member is moved to the retracted position smaller than when the rod is connected to the front part of the support member. Since it is possible to reduce the amount of protrusion of the front part of the support member when moved to the support position (to reduce the portion protruding in a cantilever manner), it is possible to stably support the reinforcing bar rod. .

  An upper wheel and a lower wheel are mounted on the first holder, a guide rail for guiding the upper wheel and the lower wheel is provided, and a rear surface of the guide rail is used as a traveling surface of the upper wheel. It is preferable that the front surface is a traveling surface of the lower wheel, the upper wheel is positioned on the first support member, and the lower wheel is positioned below the first support member. If it does in this way, it will become possible to counter suitably the moment which arises when a reinforcing bar rod is supported by the 1st support member.

  The front end portion of the first support member and the front end portion of the second support member are configured to support the auxiliary member from below at the support position, and pass between adjacent vertical bars. It is preferable to have a shape that can be inserted into the inside of the reinforcing bar rod. If it does in this way, it will become possible to support a reinforcing bar rod stably. In addition, if a protrusion is formed on the upper surface of the front end portion of the first support member, it is possible to reliably prevent the reinforcing bar rod from dropping off.

  According to the present invention, it is possible to reduce the size of the built-in device.

(A) is a side view which shows the reinforcing bar rod which concerns on embodiment of this invention, (b) and (c) are the elements on larger scale of (a). (A) is the X1-X1 arrow view of (b) of FIG. 1, (b) is the X2-X2 arrow view of (c) of FIG. It is a side view which shows the built-in apparatus which concerns on embodiment of this invention. It is a Y1-Y1 arrow line view of FIG. It is a side view which shows a raising / lowering support part and a fixed support part. (A) is an enlarged top view which shows the front part of a 1st support member, (b) is a side view of (a). FIG. 5 is a view taken along the line Y2-Y2 of FIG. 4, where (a) is a diagram illustrating a state where the elevation support unit is lowered, and (b) is a diagram illustrating a state where the elevation support unit is raised. (A) And (b) is a side view which shows the construction method of a reinforcing bar rod. (A) And (b) is a side view which shows the procedure following (b) of FIG. (A)-(d) is a side view which shows the operation example of a raising / lowering support part and a fixed support part.

  The reinforcing bar A according to the embodiment of the present invention is used for a cast-in-place concrete pile. As shown in FIG. 1A, a reinforcing bar main body A1, a joint A2, and a temporary part A3 are provided. I have. The reinforcing bar A is built into the excavation hole using the erection devices B and B (see FIG. 3) according to the embodiment of the present invention.

  As shown in FIG. 1C, the reinforcing bar body A1 is a part formed by combining a plurality of vertical bars 1, 1,... And a plurality of horizontal bars 2, 2,. It is buried in the body part of cast-in-place concrete pile. In addition to the vertical bars 1 and the horizontal bars 2, the reinforcing bar main body A1 includes a plurality of first auxiliary members 3, 3,.

  The vertical bar 1 is a pile main bar, and is composed of a plurality of deformed bars connected through reinforcing bar joints (not shown).

  The horizontal line 2 is a so-called hoop line, and is arranged so as to surround all the vertical lines 1, 1,... As shown in FIG. The horizontal bars 2 of the present embodiment are arranged on the outer peripheral side of the vertical bars 1, 1,.

  The first auxiliary member 3 is formed in a ring shape and is laid across all the vertical bars 1, 1,. The 1st auxiliary member 3 of this embodiment is arrange | positioned at the inner peripheral side of the vertical reinforcement 1, 1, ..., and is utilized as a setup reinforcement at the time of a reinforcing bar assembly. Although there is no restriction | limiting in the material of 1st auxiliary member 3, cross-sectional shape, the fixing method to the vertical reinforcement 1, etc. In this embodiment, the angle-shaped steel which gave the bending process is made into the 1st auxiliary member 3, and it welds to the vertical reinforcement 1. doing. In the present embodiment, the first auxiliary member 3 is regarded as a non-structural member (a member that does not contribute to the reinforcement of concrete), and the vertical bar 1 and horizontal bar 2 are arranged.

  As shown in FIG. 1 (c), the joint A2 is a part formed by extending all the vertical bars 1, 1,... Upward, and is embedded in a concrete foundation (not shown). The joint A2 includes the first auxiliary member 3 in addition to the vertical bars 1, but does not include the horizontal bars 2. The first auxiliary member 3 is the same as that of the reinforcing bar body A1.

  As shown in FIG. 1 (b), the temporary part A3 is a part formed by extending a part of the plurality of vertical bars 1, 1,... Upward and removed after the construction of the concrete foundation. Is done. The temporary portion A3 includes a plurality of second auxiliary members 4, 4,... Arranged at intervals in the vertical direction in addition to the vertical bars 1, but does not include the horizontal bars 2.

  In the present embodiment, in each of the two regions L and R facing each other across the center of the reinforcing bar A, a plurality of (in the present embodiment, five) vertical bars 1, 1,. Are arranged. As shown in FIG. 2A, the left and right regions L and R are both arcuate in plan view, and there are regions M and M where the vertical stripe 1 is not extended between the two regions L and R. doing.

  The second auxiliary member 4 is formed in an arc shape in plan view and is laid across at least two vertical bars 1, 1,. The cross-sectional shape, planar shape, number, and installation height of the second auxiliary member 4 are the same in the left and right regions L and R. The 2nd auxiliary member 4 of this embodiment is arrange | positioned at the inner peripheral side of the vertical bars 1, 1, ..., and is utilized as a setup bar at the time of a reinforcing bar assembly. Although there is no restriction | limiting in the material of the 2nd auxiliary member 4, cross-sectional shape, the fixing method to the vertical reinforcement 1, etc., in this embodiment, the angled steel which performed the bending process is made into the 2nd auxiliary member 4, and each vertical reinforcement 1 and Welding. In this embodiment, the interval between the vertical bars 1 and 1 in the region L or the region R is the same as the interval between the vertical bars 1 and 1 in the reinforcing bar body A1, but the vertical bars 1 and 1 in the regions L and R are the same. The longitudinal bars 1 to be extended may be thinned out so that the interval of 1 is larger than the distance between the longitudinal bars 1 and 1 in the reinforcing bar body A1.

Next, with reference to FIG. 3 thru | or FIG. 7, the structure of the built-in apparatus B which concerns on embodiment of this invention is demonstrated.
As shown in FIGS. 3 and 4, the erection device B is installed at the opening edge of the excavation hole H, and includes a support frame B1, an elevating support unit B2, a fixed support unit B3, and an elevating mechanism. B4. Each built-in device B includes two units formed by vertically arranging a lifting support portion B2 and a fixed support portion B3, and includes a support frame B1 and a lifting mechanism B4 common to both units. In addition, in this embodiment, although the two construction apparatuses B and B are made to oppose, you may change the position and number of the construction apparatuses B suitably.

  As shown in FIG. 4, the support frame B <b> 1 includes a floor girder 11, a support girder 12, a guide rail 13, a column 14, a connecting member 15, and the like.

  The siding girders 11 are arranged on both sides of the excavation hole H. The pair of span girders 11 and 11 are arranged so as to be parallel to each other, and face each other with the excavation hole H interposed therebetween. The floor girders 11 and 11 are connected by two support girders 12 and 12. Each span girder 11 extends toward another erection device B and is bolted to the spar 11 of the other erection device B. The spar 11 is made of a steel material (for example, H-shaped steel, I-shaped steel, groove-shaped steel, rectangular steel pipe, etc.).

  The support girder 12 is arranged in a direction crossing the spar 11 and the end of the support girder 12 is joined to the spar 11. The two support girders 12 and 12 are arranged in parallel in the longitudinal direction of the spar 11 and are parallel to each other. One support beam 12 is disposed so as to face the excavation hole H, and the other support beam 12 is disposed on the opposite side of the excavation hole H with the one support beam 12 interposed therebetween. The support beam 12 is made of steel.

  The guide rail 13 is a rod-shaped member that also serves as a rail for the lifting support portion B <b> 2, and is erected on the support beam 12 on the front side (the one closer to the excavation hole H) of the pair of support beams 12 and 12. The rear surface of the guide rail 13 is a traveling surface of the upper wheel 24, and the front surface of the guide rail 13 is a traveling surface of the lower wheel 25. In this embodiment, the two guide rails 13 and 13 are arrange | positioned with respect to one raising / lowering support part B2. The pair of guide rails 13 and 13 are arranged side by side in the longitudinal direction of the support beam 12 (hereinafter referred to as “left-right direction”) with a space therebetween, and face each other with the first holder 22 interposed therebetween. In this embodiment, the I-shaped steel is used as the guide rail 13, but an H-shaped steel, a grooved steel, a square steel pipe, or the like may be used as the guide rail 13.

  The support column 14 is erected on the support beam 12 on the rear side (away from the excavation hole H) of the pair of support beams 12 and 12. That is, the support column 14 is disposed behind the guide rail 13. In this embodiment, two support columns 14 and 14 are arranged for one lifting support B2. The pair of two columns 14, 14 are arranged in parallel in the left-right direction, and face each other with the first support member 21 interposed therebetween. The upper ends of the columns 14 and 14 are connected to the guide rails 13 and 13 via the connecting member 15. In this embodiment, a square steel pipe is used as the support 14, but an H-shaped steel, I-shaped steel, grooved steel, or the like may be used as the support 14.

  The connecting member 15 is disposed at the upper ends of the guide rail 13 and the support column 14, and connects the guide rail 13 and the support column 14. The connecting member 15 of the present embodiment collectively connects the bar-like member groups (guide rails 13 and 13 and the columns 14 and 14) arranged corresponding to one lifting support portion B2. When the guide rails 13 and 13 are connected by the connecting member 15, the sideways falling of each guide rail 13 is prevented. When the guide rail 13 and the support column 14 are connected by the connecting member 15, the guide rail 13 is moved forward. A fall or backward fall is prevented.

  As shown in FIG. 5, the lifting support portion B <b> 2 includes a first support member 21, a first holder 22, a first advance / retreat actuator 23, an upper wheel 24, a lower wheel 25, and the like, along the guide rail 13. To move up and down. In addition, the raising / lowering support part B2 of this embodiment is provided with two upper wheels 24 and two lower wheels 25 corresponding to the pair of left and right guide rails 13 and 13 (see FIG. 4).

  The first support member 21 penetrates the first holder 22 in a state where it can advance and retract, and a support position (a position where the first auxiliary member 3 or the second auxiliary member 4 shown in FIG. 1 can be supported) and a retracted position. (Position not interfering with the reinforcing bar A) can be selected. The “support position” can be achieved by moving the first support member 21 forward to increase the amount of protrusion from the front end of the first holder 22. And the amount of protrusion from the front end of the first holder 22 may be reduced. That is, when the first support member 21 is advanced toward the “support position”, the front end portion of the first support member 21 passes between the adjacent vertical bars 1 and 1 (see FIG. 2), and the inside of the reinforcing bar A. As shown in FIG. 6, the first auxiliary member 3 or the second auxiliary member 4 can be supported from below. Further, when the first support member 21 is retracted toward the “retracted position”, the front end portion of the first support member 21 comes out of the reinforcing bar A.

  The front end portion of the first support member 21 is formed to have a width dimension smaller than the “opening” of the vertical bars 1, 1 and to a height dimension smaller than the “opening” of the horizontal bars 2, 2. Yes. In the present embodiment, the height and width of the front end portion of the first support member 21 are made smaller than the rear portion thereof.

  A protrusion 21 a is formed on the upper surface of the front end portion of the first support member 21. The protrusion 21a is located beyond the first auxiliary member 3 or the second auxiliary member 4 when the first support member 21 is in the support position, and prevents the first auxiliary member 3 or the second auxiliary member 4 from dropping off. Stop.

  As shown in FIG. 5, the first support member 21 passes through the first holder 22, and the rear end portion of the first holder 22 always protrudes from the rear end of the first holder 22. The part which protrudes from the rear end of the 1st holder 22 among the 1st support members 21 is located between the right and left support | pillars 14 and 14 (refer FIG. 4). A rod attachment portion 21b extending downward is formed at the rear end portion of the first support member 21 (a portion that always protrudes from the rear end of the first holder 22).

  The first holder 22 holds the first support member 21 and is disposed between the left and right guide rails 13 and 13 (see FIG. 4). The first holder 22 holds the intermediate portion of the first support member 21 when the first support member 21 moves to the support position. When the first support member 21 is moved to the support position, the protrusion amount of the front portion of the first support member 21 (the protrusion amount from the front end of the first holder 22) increases, and the front end portion of the first support member 21 is a piece. In this embodiment, the intermediate portion of the first support member 21 can be supported by the entire first holder 22 even when the first support member 21 is moved to the support position. Therefore, it becomes possible to stably support the first support member 21 in a state where the weight of the reinforcing bar A is applied. The first holder 22 supports at least the top and bottom of the first support member 21 so that the first support member 21 does not rotate due to a load acting on the front end portion of the first support member 21.

  The first advance / retreat actuator 23 reciprocates the first support member 21 between the support position and the retracted position, and is disposed below the first support member 21. The first advancing / retracting actuator 23 of the present embodiment is a so-called electric cylinder, and is a first rod 23a that can advance and retreat, a housing cylinder 23b that holds the first rod 23a, and an electric motor 23c that serves as a power source for the first rod 23a. A gear case 23d that houses a reduction gear (not shown) is provided. The first advance / retreat actuator 23 is attached to the lower surface of the first holder 22 and moves up and down together with the first holder 22.

  The 1st rod 23a and the accommodation cylinder 23b are arrange | positioned at the front side (excavation hole H side) of the rod attachment part 21b. The first rod 23a is connected to the rod attachment portion 21b. When the first rod 23a is retracted, the first support member 21 moves toward the support position, and when the first rod 23a is advanced, The support member 21 moves toward the retracted position. When the first rod 23a is connected to the rod mounting portion 21b protruding from the rear end of the first holder 22, the front end portion of the first support member 21 is moved to the first holder when the first support member 21 is moved to the retracted position. 22 can be accommodated. In addition, when the first rod 23a is connected to the rod mounting portion 21b, the protrusion amount of the front portion of the first support member 21 is made smaller than when the first rod 23a is connected to the front portion of the first support member 21. Since it becomes possible to reduce the portion that projects in a cantilever manner, the reinforcing bar A can be stably supported.

  The first rod 23a and the housing cylinder 23b are located directly below the first support member 21, and the electric motor 23c is located directly below the housing cylinder 23b. As a result, the first support member 21 and the first advance / retreat actuator 23 overlap each other, so that the first advance / retreat actuator 23 is moved up and down as compared with the case where the first advance / retreat actuator 23 is arranged behind the first support member 21. The depth dimension of the support portion B2 is reduced.

  The upper wheel 24 is located on the first support member 21 and travels on the rear surface of the guide rail 13. The axles of the upper wheels 24, 24 are supported by the axle box 24a. The axle box 24 a is disposed between the upper wheels 24, 24 and is fixed to the upper surface of the first holder 22.

  The lower wheel 25 is located below the first support member 21 and travels in front of the guide rail 13. The axles of the lower wheels 25 and 25 are supported by the axle box 25a. The axle box 25 a is disposed between the lower wheels 25, 25 and is fixed to the lower surface of the first holder 22.

  The fixed support portion B3 includes a second support member 31, a second holder 32, a second advance / retreat actuator 33, and the like. Unlike the lifting support B2, the fixed support B3 does not move up and down. The fixed support part B3 of the present embodiment is located directly below the elevation support part B2.

  The structure of the 2nd support member 31 is the same as that of the 1st support member 21 of raising / lowering support part B2. That is, the second support member 31 can select a “support position” and a “retracted position”, and the front end portion of the second support member 31 passes between the adjacent vertical bars 1 and 1 to reinforce bar A. The first auxiliary member 3 or the second auxiliary member 4 is supported from below at the support position. Further, a protrusion is formed on the upper surface of the front end portion of the second support member 31. A rod mounting portion 31b extending upward is formed at the rear end portion of the second support member 31.

  The second holder 32 is fixed to the front support beam 12. Other configurations of the second holder 32 are the same as those of the first holder 22 of the lifting support portion B2.

  The second advance / retreat actuator 33 reciprocates the second support member 31 between a support position and a retracted position, and is disposed on the second support member 31. The second advancing / retreating actuator 33 according to the present embodiment is a so-called electric cylinder, which is a second rod 33a that can advance and retreat, a housing cylinder 33b that holds the second rod 33a, and an electric motor 33c that serves as a power source for the second rod 33a. And a gear case 33d that houses a reduction gear (not shown). The second advancing / retreating actuator 33 is attached to the upper surface of the second holder 32.

  The second rod 33a and the housing cylinder 33b are disposed on the front side (excavation hole H side) of the rod attachment portion 31b. The second rod 33a is connected to the rod mounting portion 31b. When the second rod 33a is retracted, the second support member 31 moves toward the support position, and when the second rod 33a is advanced, The support member 31 moves toward the retracted position. When the second support member 31 is moved to the retracted position, the front end portion of the second support member 31 is accommodated in the second holder 32. In addition, when the second rod 33a is connected to the rod mounting portion 31b, the amount of protrusion of the front portion of the second support member 31 is made smaller than when the second rod 33a is connected to the front portion of the second support member 31. Therefore, the reinforcing bar A can be stably supported.

  The second rod 33a and the accommodation cylinder 33b are located immediately above the second support member 31, and the electric motor 33c is located immediately above the accommodation cylinder 33b. If it does in this way, since the 2nd support member 31 and the 2nd advance / retreat actuator 33 will overlap up and down, compared with the case where the 2nd advance / retreat actuator 33 is arranged behind 2nd support member 31, it is fixed. The depth dimension of the support portion B3 is reduced.

  As shown in FIG. 7, the elevating mechanism B <b> 4 includes an elevating actuator 41 and a connecting portion 42. The raising / lowering mechanism B4 of this embodiment raises / lowers two right and left raising / lowering support parts B2, B2 simultaneously, and the connection part 42 is connected to two right / left raising / lowering support parts B2, B2.

  The raising / lowering actuator 41 raises / lowers the first support members 21, 21, and is disposed between the elevation support parts B 2, B 2. The raising / lowering actuator 41 of this embodiment is what is called an electric cylinder, the raising / lowering rod 41a which can be advanced / retracted, the storage cylinder 41b which holds the raising / lowering rod 41a, the electric motor 41c used as the motive power source of the raising / lowering rod 41a, a reduction gear (FIG. A gear case 41d and the like that house a housing (not shown). The lifting actuator 41 is fixed to the support beam 12.

  The elevating rod 41a is connected to the connecting portion 42. When the elevating rod 41a is advanced, the connecting portion 42 rises (see (a) of FIG. 7), and when the elevating rod 41a is retracted, the connecting portion 42 is It descends (see FIG. 7B).

  The connecting portion 42 includes a top portion 42a disposed on the lifting actuator 41, a column portion 42b extending downward from the top portion 42a, and a beam portion 42c extending sideward from the lower end portion of the column portion 42b. I have. Two column portions 42b and two beam portions 42c are provided.

  The top part 42a is connected to the upper end part of the raising / lowering rod 41a, and the beam part 42c passes between the guide rail 13 and the support | pillar 14 (refer FIG. 4), and is connected to the 1st holder 22. FIG. The column portions 42b and 42b connect the top portion 42a and the beam portions 42c and 42c, and face each other with the lifting rod 41a and the housing cylinder 41b interposed therebetween. When the column part 42b is interposed between the top part 42a and the beam part 42c, the elevating support part B2 comes to be located at a position lower than the upper end of the elevating rod 41a, so that compared with the case where the column part 42b is not interposed. Thus, the ascent limit of the lifting support portion B2 can be lowered, and consequently the length of the guide rail 13 can be suppressed.

  Next, with reference to FIG. 8 thru | or FIG. 10, the method to build the reinforcing bar A in the excavation hole H using the erection apparatus B is demonstrated.

Hereinafter, a case where the reinforcing bar A is divided into _n blocks α ₁ , α ₂ ,..., Α _n−1 , α _n will be exemplified. Note that n−1 blocks α ₁ , α ₂ ,..., Α _n-1 from the bottom are the reinforcing bar body A1, and the top block α _n are the joint A2 and the temporary part A3.

As shown in (a) of FIG. 8, first, the lifting machine by using the (not shown) carries the block alpha ₁ of the lowermost above the wellbore H, Kenkomi device at the bottom of the block alpha ₁ B , B. Next, the block α ₁ is inserted into the excavation hole H using the erection devices B and B.

In order to insert the block α ₁ (reinforcing bar main body A1) into the excavation hole H, the first auxiliary member 3 is placed on the first support member 21 as shown in FIGS. 10 (a) and 10 (b). The lowering step of lowering the first support member 21 in the state where the second support member 31 is placed on the second support member 31 as shown in FIGS. 10 (c) and 10 (d). What is necessary is just to repeat the raising step which raises the one supporting member 21.

In more detail, in the descending step, first, the first supporting member 21 is positioned below the first auxiliary member 3, a block alpha ₁ in the first support member 21 for supporting (in see FIG. 10 (a) ). Next, the lifting rod 41a is retracted (see FIG. 7A), and the lifting support B2 is lowered (see FIG. 10B). The descending step is performed with all the second support members 31 retracted. Thereafter, the height position of the lifting support portion B2 is finely adjusted, and the other first auxiliary member 3 (the first auxiliary member 3 positioned below the first auxiliary member 3 supported by the first support member 21) is moved. It is positioned slightly above the second support member 31. When lowering the first support member 21, it is desirable to synchronize the operation of the lifting actuator 41 of one construction device B and the lifting actuator 41 of the other construction device B. Incidentally, in this embodiment, since the electric cylinder is the lifting actuator 41, it can be easily synchronized.

  Next, the second rod 33a is retracted, and the second support member 31 is moved toward the support position. When the front end portion of the second support member 31 is inserted into the reinforcing bar main body A 1, the lifting support portion B 2 is slightly lowered and the first auxiliary member 3 is placed on the second support member 31. When the first auxiliary member 3 is placed on the second support member 31, the first rod 23a is advanced to move the first support member 21 toward the retracted position (see FIG. 10C). In addition, the operation | work which moves the 1st support member 21 toward a retracted position is the 1st advance / retreat actuator 23 of one construction apparatus B, and the 1st advance / retreat actuator of the other construction apparatus B from a fail safe viewpoint. 23 are preferably operated separately at different times.

When all the first support members 21 are retracted, the ascending step is performed. In the ascending step, first, the elevating rod 41a is advanced (see FIG. 7B) to elevate the elevating support part B2, and the other first auxiliary member 3 (supported by the first support member 21 in the descending step). The first support member 21 is positioned slightly below the first auxiliary member 3) located on the upper side of the first auxiliary member 3 (see FIG. 10D). Thereafter, the first rod 23a is retracted, and the first support member 21 is moved toward the support position. When the front end portion of the first support member 21 is inserted into the block α ₁ , the lifting support portion B 2 is slightly raised, and the block α ₁ is replaced with the first support member 21. When the replacement to the first support member 21 is completed, the second rod 33a is advanced to move the second support member 31 toward the retracted position (see (a) of FIG. 10). In addition, the operation | work which moves the 2nd support member 31 toward a retracted position is the second advancing / retreating actuator 33 of one erection apparatus B, and the second advancing / retreating actuator of the other erection apparatus B from a fail-safe viewpoint. It is desirable to operate 33 separately at different times.

When the above steps are repeated and the upper end of the block α ₁ is held by the erection devices B and B, as shown in FIG. 8B, a lifting machine (not shown) is used. The second block α ₂ from the bottom is carried above the excavation hole H. Once it positions the block alpha ₂ immediately above the bottom of the block alpha _1, block alpha ₁ using a mechanical reinforcing bar joint (not shown) connects the alpha _2, then, by using Kenkomi device B, the B block Decrease α ₁ and α ₂ . Thereafter, the same operation as the above steps is repeated.

As shown in FIG. 9 (a), when the upper end of the second block α _{n-1 from} the top is held by the erection devices B and B, a lifting machine (not shown) is used. Then, the uppermost block α _n is carried above the excavation hole H. Once it positions the uppermost block alpha _n (block including a temporary portion A3) directly above the block alpha _n-1, connecting the blocks α _n-1, α _n using a mechanical reinforcing bar joint (not shown), then Then, the blocks α ₁ , α ₂ ,..., Α _n−1 , α _n are lowered using the built-in devices B and B (see FIG. 9B).

In _order to insert the block α _n into the excavation hole H, although not shown in the figure, the step of lowering the first support member 21 with the one second auxiliary member 4 placed on the first support member 21, and the like The step of raising the first support member 21 in a state where the second auxiliary member 4 is placed on the second support member 31 may be repeated. Details are similar to the procedure shown in FIG.

When the uppermost block α _n (that is, the temporary part A3) is inserted into the excavation hole H, the blocks α ₁ , α ₂ ,..., Α _n-1 (that is, the reinforcing bar body A1) can be positioned in the ground. It becomes possible.

When the upper end portion of the uppermost block α _n is held by the erection devices B and B, as shown in FIG. The insertion device B is removed. Thereafter, when the concrete is placed up to the upper end of the joint A2, a cast-in-place concrete pile is formed. The temporary part A3 is excised after the concrete has hardened.

  As described above, according to the reinforcing bar rod A according to the present embodiment, the above-described erection method can be adopted, so that the entire reinforcing bar rod main body A1 can be grounded while using the erection device B. It can be built inside.

  Further, the first support member 21 and the first advance / retreat actuator 23 are stacked one above the other, and further, the first rod 23a is connected to the rear end portion of the first support member 21, and the first support member 21 and the first Since the advancing / retreating direction of the rod 23a is reversed, the depth dimension of the lifting support portion B2 is reduced. The same applies to the fixed support portion B3. That is, according to the build-in device B according to the present embodiment, the elevating support portion B2 and the fixed support portion B3 can be made compact, so that the build-in device B is installed even if the work space is narrow. It becomes possible.

  Further, in the erection device B of the present embodiment, the upper wheel 24 contacts the rear surface of the guide rail 13 and the lower wheel 25 contacts the front surface of the guide rail 13, so that the reinforcing bar A is mounted on the first support member 21. It is possible to suitably counter the moment that occurs when placed.

  In addition, in this embodiment, although the case where the junction part A2 was interposed between the reinforcing bar main body A1 and the temporary part A3 was illustrated, the junction part A2 may be omitted.

  In this embodiment, although the case where fixed support part B3 was arrange | positioned under raising / lowering support part B2 was illustrated, you may arrange fixed support part B3 on raising / lowering support part B2.

  In the present embodiment, the first advance / retreat actuator 23 is disposed below the first support member 21, but the first advance / retreat actuator 23 may be disposed on the first support member 21. In the present embodiment, the second advance / retreat actuator 33 is disposed on the second support member 31, but the second advance / retreat actuator 33 may be disposed below the second support member 31.

  In the present embodiment, the case where the first advance / retreat actuator 23, the second advance / retreat actuator 33, and the elevating actuator 41 are electric cylinders is exemplified, but it goes without saying that a hydraulic cylinder or an air cylinder may be used instead of the electric cylinder. Absent.

A Reinforcing bar 1 Longitudinal bar 2 Horizontal bar 3 First auxiliary member 4 Second auxiliary member B Mounting device 13 Guide rail 21 First support member 21a Protrusion 22 First holder 23 First advance / retreat actuator 23a First rod 24 Upper wheel 25 Lower wheel 31 Second support member 32 Second holder 33 Second forward / backward actuator 33a Second rod 41 Lifting actuator H Drilling hole

Claims (6)

It is an erection device that is used when a reinforcing bar made by horizontally laying a plurality of auxiliary members on a plurality of longitudinal bars is built in a drilling hole,
A first support member and a second support member capable of selecting a support position capable of supporting the auxiliary member and a retracted position not interfering with the reinforcing bar rod,
A first advance / retreat actuator that reciprocates the first support member between the support position and the retracted position;
A second advance / retreat actuator for reciprocating the second support member between the support position and the retracted position;
An elevating actuator for elevating and lowering the first support member,
The first advance / retreat actuator is disposed above or below the first support member,
The second advancing / retreating actuator is disposed above or below the second support member. A first holder for holding the first support member;
A second holder for holding the second support member,
The first support member passes through the first holder;
The building apparatus according to claim 1, wherein the second support member passes through the second holder. The first advance / retreat actuator includes a first rod that can advance and retreat,
The second advancing / retreating actuator includes a second rod capable of advancing / retreating,
The first rod is connected to a portion of the first support member that protrudes from the rear end of the first holder,
The building apparatus according to claim 2, wherein the second rod is connected to a portion of the second support member that protrudes from a rear end of the second holder. An upper wheel and a lower wheel mounted on the first holder;
A guide rail for guiding the upper wheel and the lower wheel,
The upper wheel is located on the first support member;
The lower wheel is located under the first support member;
The rear surface of the guide rail becomes the traveling surface of the upper wheel,
The construction apparatus according to claim 2, wherein a front surface of the guide rail is a traveling surface of the lower wheel.   The front end portion of the first support member and the front end portion of the second support member are inserted into the rebar rod through the adjacent vertical bars, and support the auxiliary member from below at the support position. The built-in device according to any one of claims 1 to 4, wherein:   6. The erection device according to claim 5, wherein a protrusion is formed on the upper surface of the front end portion of the first support member.

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