JPH0260490B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a concrete segment gauntlet assembly apparatus for assembling gauntlets to be buried in precast concrete segments used when excavating a tunnel.

(Prior Art) In general, gauntlet reinforcement for concrete segments includes a multi-stage main reinforcement 2 having L-shaped bent portions 2b at both ends of an arcuate portion 2a facing in the direction of circular curvature of the segment 1, as shown in FIG. This multi-stage main reinforcement 2 is combined with a multi-stage hoop reinforcement 3 arranged so as to be wound in a direction perpendicular to the longitudinal direction thereof, and the welding between them is welded using a welding machine.

Conventionally, when assembling this type of gauntlet reinforcement for concrete segments, a frame 4 was used as shown in Fig. 6.
A device is used in which a pair of side plates 5 are arranged in parallel to each other and a hoop muscle support groove 6 is formed on the inner surface of the side plate 5, and a required number of hoop muscles 3 are inserted into the hoop muscle support groove 6. The main reinforcing bars 2 are inserted into each of the hoops 3, 3, and the hoop reinforcing bars 3 and the main reinforcing bars 2 are welded together using a welding machine.

(Problems to be Solved by the Invention) In such a conventional device, the arcuately curved gauntlets a are placed on the work floor with the concave shape of the curve facing upward or downward, and are assembled. In addition, there is no member to support the main reinforcing bars 2, so the worker must hold them by hand or connect the main reinforcing bars 2 and hoop bars 3 with a wire or the like in advance. There were problems in that work such as tying was required, which required a large number of man-hours and resulted in high costs.

In view of such conventional problems, the present invention allows main reinforcement and hoop reinforcement to be easily and appropriately maintained,
Furthermore, the present invention aims to provide a gauntlet assembly device for concrete segments that allows easy welding work.

(Means for Solving the Problems) The gist of the present invention to achieve the above-mentioned object is to provide a plurality of cages on a base that are arranged oppositely at intervals corresponding to the thickness of the segment cage bars. Pairs of columns are erected to correspond to the curvature of the segment, and each pair of columns horizontally supports the main bars placed in the longitudinal direction of the segment in a multi-stage arrangement. and the hoop reinforcement bars vertically supporting the hoop reinforcement arranged to wrap the main reinforcement in a direction perpendicular to the longitudinal direction of the main reinforcement are provided in succession between each of the pillars and arranged opposite to each other, and the mutually opposing hoops are provided. A gauntlet assembly device for a concrete segment is provided, in which at least one of the bar supporting bars can be moved forward and backward toward the other.

(Function) When using this device, move the hoop muscle support bars back and forth to adjust the spacing according to the width of the hoop muscle to be used, and insert each hoop muscle between the hoop muscle support bars with the longitudinal direction facing up and down. and position it. After that, the main bar support bars are laid between the columns, the main bars are inserted into each hoop bar, and supported on the main bar support bars between the columns. Position each main muscle and the hoop muscles with each other in a horizontal state. In this state, the intersection points of the main reinforcement and the hoop reinforcement are sequentially welded using welding bars to form gauntlet reinforcement. And after the assembly is completed,
Either each main bar support bar is removed and the assembled gauntlet bar is lifted upward, or the hoop bar support bar is retreated at the same time as the main bar support bar is pulled out, and the basket bar is pulled out from its end in the horizontal direction.

(Example) Next, an example of implementation of the present invention will be described with reference to FIGS. 1 to 4.

In the figure, 11 is a base, and this base 11 has a flat floor slab 12 on its upper surface. A large number of pairs of supports 13a, 13b, 14a, and 14b are erected on the upper surface of the floor slab 1. Each pair of supports 13a, 13
b, 14a, and 14b are arranged so that one of them is located inside the arch shape and the other one is located outside the arch shape, corresponding to the arch shape end face shape of the segment.

Of each pair of pillars, the pillars 14a at both ends,
L-shaped crosspieces 15a, 15b... are protruded from the side surfaces of the other supports 13a, 13b other than 14b in a multi-stage arrangement, and a main reinforcement support crosspiece 16 is horizontally suspended between the respective crosspieces 15a, 15b. As a result, the main reinforcing bars 16 are strung across each pair of supports 13a, 13b in a multi-stage arrangement.

Further, a main reinforcement end support column 17 is supported between the columns 14a and 14b at both ends. This main reinforcement end support column 17 has a large number of main reinforcement support pieces 18a on both sides,
18b... is provided protrudingly, and the bent portion 2b at the end of the main reinforcement 2
between the upper and lower main reinforcement support pieces 18a and 18a.
It is designed to be inserted between the supports 18b and 18b, and has a projecting piece 19 integrally on the back side, and one end of the projecting piece 19 is rotated by a hinge 19a with respect to one of the pillars 14a. It is movably supported and positioned in a predetermined direction by the other end of the overhang piece 19 coming into contact with the other support column 14b.

In addition, the columns 13a, 13b have upper and lower pairs of hoop support bars 20a, 20b horizontally arranged on the inner and outer columns 13a, 13a... and 13b, 13b...
It is supported continuously. Each hoop support bar 20a, 20b is curved in accordance with the arch-shaped inner and outer curvature of the hoop reinforcement a to be assembled.
As shown in FIGS. 3 and 4, a large number of concavities 21, 21, . . . into which the hoop lines 3 fit are formed on the opposing surfaces at desired intervals between the hoop lines.

Also, among these hoop muscle support bars, the hoop muscle support bar 20a located on the inside of the arch shape is attached to the support column 13.
The hoop muscle support bar 20b, which is fixed to the hoop muscle support bars 20a and 14b and located on the outside of the arch shape, is movable toward and away from the inner hoop muscle support bar 20a.
is supported by That is, the hoop support beam 20b has a sliding piece 22 protruding from the back surface corresponding to each pillar 13b, and this sliding piece 22 is attached to the pillar 1.
The slide piece 22 is slidably inserted into a guide groove 23 formed on the side surface of the column 3b, and an L-shaped adjustment piece 24 is fixed to the protruding end of the slide piece 22. An adjustment bolt 25 protruding parallel to the adjustment bolt 22 is passed through the adjustment bolt 25, and a screw nut 26 is screwed onto the adjustment bolt 25 on the back side of the adjustment piece 24. By tightening the screw nut 26, the slide piece 22 is adjusted. The hoop support bar 20b is pushed out in a direction toward the other hoop support bar 20a.

In addition, 27 in the figure is the outer hoop muscle support crosspiece 20b.
The hoop muscle support beams 20 of the hoop muscle support beams 20b are dedicated support columns, and the hoop muscle support beams 20b are sandwiched between both sides of this support column 27.
A pair of slide pieces 22a, 22 on the back of the central part of b.
b is provided in a protruding manner, and by sandwiching both side surfaces of the support column 27 with these slide pieces 22a and 22b, longitudinal movement of the hoop support bar 20b is prevented.

In addition, 28 in the figure is a sleeper 2 on the floor slab 12 of the base 11.
This is a hoop support frame supported via 9.

When using the gauntlet assembling device for concrete segments constructed in this way, the screw nut 26
Adjust the spacing between both hoop muscle support bars 20a, 20b to match the desired width of the hoop muscle 3, fit the hoop muscle 3 into the recesses 21, 21 of both hoop muscle support bars 20a, 20b, and then sequentially Set. Next, the main reinforcement support crosspiece 1 is inserted between each pair of supports 13a and 13b.
6, 16..., and the main bars 2, 2... are passed and supported on each main bar support bar 16 with the main bar end support column 17 open. Next, the main reinforcement end support column 17 is rotated in the closing direction, and the main reinforcement support pieces 18a, 18
The bent portion 2b at the end of each main reinforcing bar 2 is inserted between a and 18b, 18b to position each main reinforcing bar 2 in a predetermined direction and height.

In this state, the intersection of the main reinforcing bars 2 and the hoop reinforcing bars 3 is welded to integrate each reinforcing bar. After assembling the gauntlet bars a in this way, each main bar support bar 16 is removed, the hoop bar support bar 20b is retreated, and the main bar end support column 17 is further opened to lift the gauntlet bar a or slide it in the longitudinal direction. Take it out.

(Effects of the Invention) The present invention is constructed as described above, and by assembling the gallows for concrete segments with their width directions facing up and down, welding work can be performed from both sides. Workability is good because the parts are located close to the outside surface, making it easy to perform highly efficient welding work.In addition, the main reinforcement support bars are arranged in multiple stages between the columns and can be removed and hung horizontally, making it easy to support the main reinforcements. can be done easily and competently,
This has resulted in a marked improvement in assembly work efficiency.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an example of the implementation of the device of the present invention, Fig. 2 is a front view with the curvature omitted, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is the main part. FIG. 5 is a perspective view schematically showing a gauntlet bar assembled by the present device, and FIG. 6 is a longitudinal cross-sectional view of the conventional device. 2...Main reinforcement, 2b...Bending portion, 3...Hoop reinforcement, 11...Base, 13a, 13b, 14a, 1
4b... Support, 15a, 15b... Crosspiece, 16...
...Main bar support beam, 17...Main bar end support column, 18
a, 18b... Main reinforcement support piece, 20a, 20b...
Hoop muscle support crosspiece.

Claims (1)

[Claims] 1. On the base, a plurality of pairs of columns facing each other at intervals corresponding to the thickness of the segment cage reinforcements are erected in correspondence with the curvature of the segments, and each pair of columns makes up a segment. The main reinforcing bars that horizontally support the main reinforcing bars arranged in the longitudinal direction are horizontally hung in a multi-stage arrangement, and the hoop bars arranged to wrap the main reins in a direction perpendicular to the longitudinal direction are vertically supported. A gauntlet reinforcement assembly device for a concrete segment, wherein hoop reinforcement support bars are provided in a continuous manner between each of the pillars and are arranged opposite to each other, and at least one of the mutually opposing hoop reinforcement support bars is movable toward the other.