JP2009275475A - Post erection method by anchor bolt, and anchor bolt bender - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a post erection method by an anchor bolt, and an anchor bolt bender conveniently used for the method dispensing with impairing the strength of a floor slab and a weir wall of reinforced concrete and the mounting strength of a post because an anchor bolt insertion hole can be bored avoiding a reinforcement even when the reinforcement exists directly under an anchor bolt insertion part. <P>SOLUTION: The post erection method is carried out by boring the insertion hole of the anchor bolt of the post in the floor slab of reinforced concrete or in the weir wall provided at the floor slab, inserting the anchor bolt mounted beforehand to the post, into the insertion hole, and sticking it with a curable adhesive to erect the post. The insertion hole is bored obliquely to avoid the reinforcement in the floor slab or weir wall, and the anchor bolt is bent in the almost same inclined direction as the insertion hole by buckling at a base end directly under the post. The inclined anchor bolt is inserted into the insertion hole. The anchor bolt bender is provided for this method. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column erecting method using anchor bolts and an anchor bolt bender used therefor, which are applied when a handrail is installed on a reinforced concrete floor board protruding from a veranda or a dam wall protruding from the floor.

  In order to provide a handrail on a veranda in a concrete building, an anchor bolt that supports a column is generally embedded. FIG. 8 shows an example of this. In this example, a pair of front and rear anchor bolt holes 54, 54 are provided in a column (or column core) 50 made of an extruded aluminum material. The upper ends of the anchor bolts 52, 52 are inserted into the holes and fixed with a curable adhesive so that they cannot be removed.

  In the field, a pair of insertion holes 56 and 56 are drilled in a place where the column is set up at the end of the floor 53, and a curable adhesive is poured into the insertion hole, and then the anchor bolts 52 and 52 are inserted into the column. 50 is set up. In some cases, one anchor bolt is attached to the support column 50.

  In any case, since the location where the insertion hole of the anchor bolt is drilled is determined by the planned structure and position of the handrail, it may be unavoidable to hit the rebar when drilling at that position. In such a case, conventionally, it is forced to select whether to proceed drilling even when hitting the reinforcing bar or to stop drilling before the reinforcing bar. In the former, the reinforcing bar is cut and the strength of the weir wall is sacrificed, and in the latter, shallow drilling is performed. The anchor strength was sacrificed by cutting the anchor bolts in accordance with the above, and all of them had inconvenient results.

  In the present invention, in view of the above situation, even when a reinforcing bar exists directly under the anchor bolt, the anchor bolt insertion hole can be drilled avoiding the reinforcing bar, so that the floor board or dam wall of the reinforced concrete can be drilled. An object of the present invention is to provide a method for erecting a column with anchor bolts that eliminates the need to sacrifice strength and mounting strength of the column, and to provide an anchor bolt bender that can be used conveniently for this method.

  In order to solve the above-mentioned problems, the present invention drills an insertion hole for a anchor bolt of a column in a reinforced concrete floor board or a dam wall provided on the floor, and uses the anchor bolt attached to the column in advance in the insertion hole. It is a method of inserting and fixing with a curable adhesive to erect the pillar, drilling the insertion hole diagonally so as to avoid the reinforcing bar in the floor or dam wall, and anchor bolt at the base end just below the pillar Providing a stand-up method of a column with an anchor bolt, which is bent by bending the same direction as the insertion hole by refraction of the insertion hole, and the inclined anchor bolt faces the insertion into the insertion hole. Is.

  Since the column erecting method using the anchor bolt is configured as described above, it is applied to the case where a reinforcing bar exists directly below when the anchor bolt insertion hole is provided in the center of the position where the column is erecting. In order to avoid rebars, the drill holes are slanted, and the anchor bolts already attached to the lower ends of the columns are inserted through the process of bending at the base end to the same or almost the same inclination as the perforations. When the anchor bolt is inserted so as to be dropped into the hole, a vertical standing state of the column is obtained. It should be noted that a certain degree of adjustment is possible with a sufficient insertion hole, and the adjustment is fixed by fixing with a curable adhesive.

  Further, the present invention is an anchor bolt bender in which the anchor bolt attached to the lower end of the column in the above-described column standing construction method is bent obliquely at the protruding proximal end thereof, and the standing plate is erected on the tread that is stepped on with shoes It is made of a metal member having an inverted T-shaped or L-shaped cross section, and is attached to one or both surfaces of the upright plate along with the protruding base end of the anchor bolt with the lower end surface of the column hanging from the surface. An upper stage pin and a lower stage pin that receives the bending force of tilting the column forward or backward with the upper stage pin as a fulcrum. An anchor bolt bender is provided in which the distance between positions is set to be approximately the same as the diameter of the anchor bolt.

  Since the anchor bolt bender is configured as described above, when using this, if the anchor bolt projecting from the lower end of the column is dropped vertically into the distance between the front and rear positions of the upper and lower pins, the anchor bolt is Because the front-rear position is regulated, the lower end of the support must be hooked on the upper pin, so that the descent stops at a predetermined position, and at the same time, the protruding base end of the anchor bolt also hooks on the side of the upper pin as a fulcrum of bending. become. At the same time, the lower end of the anchor bolt is hooked on the side of the lower pin, so if you push the strut forward or backward while stepping on the rear end of the tread with your shoes, the reverse force to tilt will stop with both upper and lower step pins. Therefore, the bending force is concentrated at the location of the upper pin, and the anchor bolt is reliably bent at the protruding proximal end.

  Furthermore, the present invention is an anchor bolt bender that bends an anchor bolt attached to the lower end of the support column obliquely at the protruding base end in the above-mentioned support column construction method, and has an upright plate installed on the tread that is stepped on with shoes It is made of a metal shape with an inverted T-shaped or L-shaped cross section, and an anchor bolt projecting from the lower end of the column is inserted into one or both sides of the upright plate. An anchor characterized in that a cylindrical insertion member having a close inner diameter is fixed vertically and a force to tilt the support column in either the front or rear direction is applied as a force to bend the anchor bolt with the upper end of the insertion member as a fulcrum. Bolt vendors are provided.

  Once the anchor bolt bender is configured as described above, in order to use it, inserting the anchor bolt into the insertion member restricts the anchor bolt from moving to the insertion member over the entire length of the protrusion. Even if it is tilted forward or backward, the anchor bolt can be bent at the protruding proximal end with the upper end of the insertion member as a fulcrum, and the bending tends to concentrate on the portion.

  As described above, according to the column erecting method of the anchor bolt of the present invention, even when a reinforcing bar exists directly under the anchor bolt, the anchor bolt insertion hole can be drilled avoiding the reinforcing bar, There is no need to sacrifice the strength of the struts as well as the strength of the reinforced concrete floor and dam walls, and there is an excellent effect that the struts can be erected safely in a suitable manner for building maintenance.

  Further, according to the anchor bolt bender of the present invention, it is possible to position the anchor bolt by dropping it vertically and inserting the anchor bolt between the upper stage pin and the lower stage pin or into the insertion member. Immediately push down the strut and bend the anchor bolt at the protruding proximal end. At that time, you can use the foot to hold down the inversion of the anchor bolt bender and work efficiency is good, and relatively long strut It is easy to obtain the standard of the bending angle with the inclination of, and in addition, it is not only simple in structure but also mobile, it can move freely on site and can be used conveniently by stepping and fixing anywhere It is effective.

  1 to 4 show an embodiment of the present invention. In the case where a pillar 3 of a handrail P is erected on the edge of a reinforced concrete floor 1, a pair of front and rear through holes are provided in the pillar 3. 4 and 4 are provided, and anchor bolts 5 and 5 are inserted at the lower ends of both of them. Correspondingly, the insertion holes 11 and 11 of the pair of inner and outer anchor bolts 5 and 5 are provided in the floor board 1. To avoid this, it is perforated at an angle.

  As for the bar arrangement, a pair of C-shaped supports are arranged between the upper bar arrangement where the transversal reinforcing bars 7a, 7b intersect and the lower bar arrangement where the transversal reinforcing bars 8a, 8b intersect. Muscles 9a and 9b are interposed. In this case, the insertion holes 11 and 11 of both anchor bolts 5 and 5 are inclined and parallel to each other in order to avoid the one horizontal bar 7b and the upper ends (not shown) of the pair of support bars 9b and 9b. Perforated. In addition, although the concave groove 12 is previously drilled in the place where both insertion holes 11 and 11 are drilled (FIGS. 3 and 4), this is more than that so that the column 3 can be received on the upper surface of the floor board 1. It is formed narrow. Next, the procedure of an example of the upright construction method of the column 3 will be sequentially described in the case of installing the aluminum handrail P.

  The handrail P is assembled into a rough framework in the factory, for example, a framework composed of several columns 3, 3,... And upper and lower horizontal rails 6, 6, which are brought into the site and preparation for installation is started. (See FIG. 1). At this time, a pair of anchor bolts 5 and 5 are already attached to the lower ends of the respective columns 3. The anchor bolts 5 and 5 are fixed with a curable adhesive. In FIG. 3, reference numeral 13 denotes an inside plug that receives the curable adhesive that is inverted and poured into the support column 3 from above.

  In the field, the insertion holes 11 and 11 of the anchor bolts 5 and 5 provided at the lower end of the support column 3 are drilled. However, when it is necessary to avoid the reinforcing bars, the oblique insertion holes 11 and 11 as described above. Therefore, the anchor bolts 5 and 5 are bent obliquely at the lower end of the support column 3 in accordance with the inclination angle. 1 and 2 show an anchor bolt bender 10 used for the bending.

  The anchor bolt bender 10 is made of an inverted T-shaped (or L-shaped) aluminum extruded shape with an upright plate 17 standing on a tread plate 15, and a steel reinforcing plate 19 on the side surface of the upright plate 17 at the center thereof. The upper stage pin 22 which the lower end surface of the support | pillar 3 hooks with the one anchor bolt 5 protrudes in the upper part of the outer surface of the reinforcing plate 19 (FIG. 2), and the upper stage pin 22 is used as a fulcrum to the anchor bolt 5 Since the support column 3 is pushed down to the front R so that bending stress is applied, the lower end of the anchor bolt 5 is prevented from reversing the lower end of the anchor bolt 5 with respect to the inclination to the front R. Then, the lower pin 23 is projected. In addition, both ends of the upright plate 17 are rounded and rounded.

  The vertical distance between the upper and lower pins 22 and 23 is smaller than the length of one anchor bolt 5, but the distance L between the front and rear positions of the pins 22 and 23 is set so that the anchor bolt 5 can be rationally operated. The diameter of 5 is almost the same. This is because the anchor bolt 5 is inserted vertically so that it is sandwiched between the pins 22 and 23 simultaneously (FIG. 2). In this state, the anchor bolt 5 can be easily bent by tilting the column 3 forward R while pressing the end of the tread 15 with the work shoes 25. In addition, the bending was bent at the protruding base end of the anchor bolt 5, that is, directly below the support column 3, and the bending was hardly generated below that, so that it was easily inserted into the insertion hole 11 and maintained straight.

  In this way, after bending one anchor bolt 5 as described above, once removing it and changing its position, the other anchor bolt 5 is inserted between the pins 22 and 23 in the same manner, and one anchor bolt is inserted. Bend it almost parallel to 5. Since the anchor bolts 5 and 5 are inserted into the insertion holes 11 and 11 at the same time, they need to be parallel or almost parallel. However, this parallel condition is not always essential. In particular, there is no problem when there is only one anchor bolt 5, and even if there is a pair, there is no problem if a single anchor bolt 5 is retrofitted.

  Although not shown separately for the post-attachment means, for example, one insertion hole 11 out of both insertion holes 11, 11 is formed to be inclined so as to avoid a reinforcing bar, Since the insertion hole 11 is not necessary, it is adopted when it is formed vertically, or when it is formed in parallel and obliquely, but hits the reinforcing bar. At this time, only one anchor bolt 5 is attached to the support column 3 in advance, and bending is applied thereto. And after inserting the said one anchor bolt 5 in the diagonal insertion hole 11 and standing the support | pillar 3, by dropping the other anchor bolt 5 from the top (refer arrow Q of FIG. 1), from above the support | pillar 3 It is also possible to take a special method of inserting into the vertical insertion hole 11. In any case, the curable adhesive 14 is injected into the insertion hole 11 in advance when the anchor bolt 5 is inserted.

  It should be noted that even if the anchor bolts 5 and 5 at the lower ends of the support pillars 3, 3,... Of the handrail P are bent, the manner of avoiding the reinforcing bar is different. Not exclusively. In this regard, the anchor bolt bender 10 can be freely bent in any direction.

  Moreover, although the anchor bolt 5 was shown attached to the support | pillar 3, it may be attached to the support | pillar core material (not shown) stored in the support | pillar 3, and such a form is also included in this invention. Shall. Furthermore, in the said embodiment, although the concave groove 12 was provided in the location which drills the insertion holes 11 and 11, this is because the bending location (just under the support | pillar 3) of the anchor bolt 5 does not support the edge of the insertion hole 11. The groove 12 is not necessarily required because it is not supported if the mouth is widened. The concave groove 12 is filled with mortar 27 or the like after the support column 3 is erected.

  In the above-described embodiment, the case where the upper and lower pins 22 and 23 of the anchor bolt bender 10 are attached to the auxiliary plate 19 is a method of pushing the support column 3 forward with the anchor bolt 5 as the fulcrum 22 as a fulcrum. When the anchor bolt bender 10 is inverted around the auxiliary plate 19, the relationship between the upper and lower pins 22, 23 in the inverted auxiliary plate 19 is such that the anchor 3 is supported by the anchor bolt 5 and the upper pin 22 as a fulcrum. The predetermined bending of the anchor bolt 5 is obtained by pushing backward. Also in this case, the tread board 15 is required.

  In the anchor bolt bender 10, in the above embodiment, the place where the anchor bolt 5 is bent (the position of the upper stage pin 22 and the lower stage pin 23) is the central part between the front and rear, but as the front end part as shown in the next embodiment. You can also. Moreover, you may provide the upper stage pin 22 and the lower stage pin 23 continuously in multiple pairs.

  FIGS. 5 to 7 show other embodiments of the anchor bolt bender 10. In this case, as described above, the anchor bolt bender 10 can be folded on the one surface of the end of the upright plate 17 so that it can be bent. The insertion member 24 into which the anchor bolt 5 is inserted is vertically fixed and attached.

  The insertion member 24 has a strong steel channel shape, and a plurality of screw bolts 27 are used for mounting. The through hole 29 is formed in the upright plate 17, and the screw hole 31 is formed in the channel-shaped bottom portion of the insertion member 24. And screw bolts 27 are screwed into the screw holes 31 from the through holes 29 and tightened.

  FIG. 5 shows that among the pair of front and rear anchor bolts 5, 5 projecting to the lower end of the column 3, the front anchor bolt 5 has already been bent, and the insertion member 24 is used to bend the remaining rear anchor bolt 5. Since the anchor bolt 5 is sandwiched between the front and rear walls 24a, 24a of the insertion member 24 and the movement is restricted as a whole by insertion, the support column 3 is attached to the upper end of the insertion member 24. When it is tilted forward in the hooked state (FIG. 7), the bending stress concentrates on the protruding proximal end of the anchor bolt 5 and is reliably bent only there. Because of such a function, the insertion member 24 may be cylindrical although illustration is omitted.

  Even in the case where the insertion member 24 is used, as shown by a two-dot chain line in FIG. 5, it may be provided at the center of the anchor bolt bender 10, or a plurality of insertion members 24 may be provided in parallel. it can. FIG. 6 shows a case where the anchor bolt bender 10 is formed in an inverted T shape by a two-dot chain line.

It is a perspective view which shows the point of the standing construction method of the support | pillar by the anchor bolt of this invention with an anchor bolt bender. It is a side view which shows the use condition of the anchor bolt bender. It is sectional drawing which shows the point which inserts an anchor bolt in an insertion hole in the standing construction method of the support | pillar. It is sectional drawing which shows the state which inserted in the same point and erected the support | pillar 3. It is sectional drawing which shows the anchor bolt bender by other embodiment in the usage point. It is sectional drawing of AA of FIG. It is a side view which shows the use condition of the anchor bolt bender. It is sectional drawing which shows a prior art example in the point which inserts an anchor bolt similarly to FIG.

Explanation of symbols

1 Floor 3 Strut (or strut core)
5 Anchor bolt 7a, 7b, 8a, 8b, 9a, 9b Reinforcing bar 10 Anchor bolt bender 11 Insertion hole 14 Hardening adhesive 15 Tread plate 17 Standing plate 22 Upper step pin 23 Lower step pin 24 Insertion member 25 Shoes L Interval R Front

Claims (3)

  Insert the anchor bolt insertion hole into the reinforced concrete floor or the dam wall provided on the floor, insert the anchor bolt attached to the pillar in advance into the insertion hole, and fix it with a curable adhesive. It is a construction method that pierces the insertion hole diagonally so as to avoid the reinforcing bar in the floor or the dam wall, and the anchor bolt is bent at the same inclination direction as the insertion hole by refraction at the base end just below the column. A method of erection of a column with anchor bolts, characterized in that it is bent and the inclined anchor bolts are inserted into the insertion holes.   An anchor bolt bender that bends the anchor bolt attached to the lower end of the column obliquely at the base end of the column in the above-mentioned column erecting method, and has an inverted T-shaped cross section in which an upright plate is erected on a tread that is stepped on with shoes An upper pin, which is made of a metal shape of a letter shape, hangs on one or both surfaces of the upright plate with the protruding base end of the anchor bolt hanging from the surface, and serves as a fulcrum for bending the anchor bolt; In order to receive the bending force that tilts the column with the pin as a fulcrum, a lower pin that protrudes from the lower end of the anchor bolt is projected, and the distance between the front and rear positions of the upper pin and the lower pin that retreats further is set as the diameter of the anchor bolt. Anchor bolt bender characterized by being set to the same level as An anchor bolt bender that bends the anchor bolt attached to the lower end of the column obliquely at the base end of the column in the above-mentioned column erecting method, and has an inverted T-shaped cross section in which an upright plate is erected on a tread that is stepped on with shoes It is made of a metal shape of a letter shape, and an anchor bolt protruding from the lower end of the support is inserted on one or both sides of the upright plate. A channel shape with an inner width in the front-rear direction close to its diameter or a cylindrical shape with an inner diameter close to its diameter. An anchor bolt bender characterized in that the insertion member is fixed vertically and a force for tilting the column in either the front or rear direction is applied as a force to bend the anchor bolt with the upper end of the insertion member as a fulcrum.

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