JPH0712435Y2 - Anchor bolt support jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an anchor bolt support jig capable of increasing the construction efficiency of a cloth foundation and improving the positional accuracy of the anchor bolt.

[Conventional technology]

For example, the lower end of the wall of the house, the base metal fitting that holds the outer end of the floor beam, and the pillar that forms the large frame are usually fixed by anchor bolts that are planted on the cloth foundation.

In addition, such an anchor bolt 1a is conventionally provided with a hole portion in a plate material b bridged between the upper ends of concrete pouring formwork as shown in FIG. 5 and an anchor bolt a penetrating the hole portion. By screwing a plurality of nuts d ...
It fixed by narrowing the front and back of the plate material b between d.

Further, the screw portion of the anchor bolt a protruding from the plate material b is wrapped with a tape e or the like in order to prevent adhesion of concrete at the time of placing, and washing work such as washing with water after placing is performed. Is applied.

[Problems to be solved by the device]

However, in such a conventional one, when the pressure is narrowed by the nut, the protruding screw portion is tilted from the vertical line and is displaced from the center, resulting in poor verticality. In addition, taping for protecting the screw portion, cleaning work, and the like require a lot of labor and labor, which impairs work efficiency, and further, the protection is insufficient, and when mounting the pillar body or the like, the quality is poor.

In particular, a plurality of anchor bolts, usually four anchor bolts, are used to attach the pillar body, and each screw portion is required to be parallel to each other and arranged at a highly accurate pitch interval.

However, in the conventional case, the positional accuracy of the hole portion formed through the plate material b is inferior and the anchor bolts individually decenter, so that it is difficult to obtain low pitch accuracy and excellent parallelism.

A first invention of the present application is an anchor bolt support jig capable of easily and surely preventing concrete from adhering to a threaded portion of an anchor bolt, improving work efficiency, and fixing an anchor bolt with high verticality. The purpose is to provide.

In addition to the above, the second invention aims to provide an anchor bolt supporting jig which can fix a plurality of anchor bolts with high pitch accuracy and can improve the parallelism between the anchor bolts.

[Means for Solving the Problems]

A first invention of the present application is a support jig for anchor bolts, which is arranged on a support plate through which the anchor bolts extend side by side over the upper ends of a formwork in which concrete is placed. A base cylinder having a diameter larger than that of the anchor bolt and covering the threaded portion of the anchor bolt protruding upward is formed with a screw hole of a small height located below the base cylinder and screwed into the threaded portion of the anchor bolt. Along with the nut fitting, a lock nut previously screwed into the threaded portion comes into contact with rotation in the opposite direction, and a non-circular head piece located at the upper end of the base cylinder that facilitates rotation of the base cylinder with fingers. And are provided.

A second invention is a jig for supporting an anchor bolt, which is arranged between juxtaposed and is held between upper ends of a formwork in which concrete is placed, and is arranged on a receiving plate through which the anchor bolt passes. The screw covers the screw part of the anchor bolt projecting above the receiving plate through a positioning hole formed in accordance with the arrangement of the anchor bolt, and has a diameter larger than the screw part and cannot be slipped out and freely rotatable in the positioning hole. On the mounting base cylinder,
A nut fitting which is located below the base cylinder and has a small height screwed into the threaded portion of the anchor bolt, and a lock nut previously screwed into the threaded portion abuts with rotation in the opposite direction. And a non-circular head piece located at the upper end of the base cylinder for facilitating rotation of the base cylinder with fingers.

[Action]

Since the anchor bolt support jig of the first invention has a base cylinder that covers the protruding portion of the anchor bolt protruding above the receiving plate, it is possible to reliably prevent concrete from adhering to the protruding portion during pouring. The work such as taping and cleaning can be eliminated to greatly improve the construction efficiency. The jig can be easily attached to the projecting portion by the screw hole at the lower end of the base cylinder and the non-circular head piece provided at the upper end of the base cylinder, and its usability can be improved.

Further, since the jig protects the anchor bolt so as to narrow the pressure by abutting against the receiving plate, the verticality of the protruding portion can be increased, and the nut metal fitting is preliminarily screwed into the threaded portion and abuts on the nut metal fitting. Anchor bolts can be positioned with high precision using nuts.

According to the second invention, the base cylinder is rotatably and rotatably provided in each of the positioning holes of the receiving plate formed in accordance with the arrangement of the anchor bolts. That is, since each base cylinder is attached to the receiving plate with high positional accuracy and is rotatable, the anchor bolt is easily screwed to each base cylinder. Therefore, in addition to the function of the first device, each anchor bolt can be fixed with high pitch accuracy. Moreover, since the anchor bolts are held with a high degree of verticality, mutual parallelism can be greatly improved.

〔Example〕

The anchor bolt support jig 1 of the first invention holds the one anchor bolt 3 for fixing the L-shaped base metal fitting A for receiving a wall of a house, for example, and the anchor of the second invention. The case where the bolt supporting jig 2 is used to hold, for example, the four anchor bolts 5 for fixing the columnar body B, will be described as an example with reference to the drawings.

In the figure, the anchor bolt support jig 1 is provided on a receiving plate 6 through which the anchor bolt 3 passes, and has a tubular portion 9 for covering the protruding portion 3A of the anchor bolt 3 protruding above the receiving plate 6, and below the tubular portion 9. A screw hole 10 for screwing with the anchor bolt 3 is provided.

Further, the anchor bolt supporting jig 2 covers the protruding portion 5A of the anchor bolt 5 on the receiving plate 12 having the positioning holes 11 ... Corresponding to the arrangement of the anchor bolts 5 and cannot be slipped off by the positioning holes 11 and is rotatable. With a tubular portion 13 ...
13 A screw hole 15 is provided below the screw bolt 15 for screwing into the anchor bolt 5.

The receiving plates 6 and 12 are held between the upper ends of the formwork 20 and 20 for concrete pouring, respectively.

The formwork 20 has an inwardly facing piece 23 extending inwardly through a leg piece 22 rising at a small height at an inner edge of a fixing piece 21 nailed to a horizontal base concrete 19, and On the inward edge of the facing piece 23, a standing piece 24 that rises relatively tall is formed.

Therefore, the formwork 20 is juxtaposed so as to face each other so that a space between the formwork 20 has a convex shape in which a narrow foundation beam concrete placing part H2 is projected on a wide foundation concrete placing part H1. The location H can be formed. In addition, the foundation concrete 19
Is a ground surface obtained by pouring concrete horizontally while leveling concrete on the earthwork that is covered with beads and the like.

The frame 20 has a horizontal receiving piece 25 extending outward at the upper end of the standing piece 24. In this example, the receiving plate 6 of the anchor bolt supporting jig 1 is bridged between the receiving pieces 25. On the other hand, the receiving plate 12 of the anchor bolt supporting jig 2 is held between the receiving pieces 25 via a joint plate 26 that bridges between the receiving pieces 25.

The receiving plate 6 has a U-shaped configuration in which side pieces 6B along the outward end of the receiving piece 25 project downward at both ends of the base 6A extending between the receiving pieces 25, and the side piece 6B faces outward of the receiving piece 25. The rigidity of the frame 20 that engages with the ends is increased, and the widening between the frames 20 due to the driving pressure is suppressed.

Further, an insertion hole 29 through which the anchor bolt 3 passes is provided through the base portion 6A in accordance with the arrangement position of the anchor bolt 3, and the protruding portion 3A of the anchor bolt 3 protruding upward from the base portion 6A.
Is covered and held by the anchor bolt support jig 1. As the anchor bolt 3 and the anchor bolt 5, known ones in which a screw portion 30 is formed at the upper end of a vertically extending base shaft and a U-shaped hook portion is formed at the lower end are used.

Further, the anchor bolt supporting jig 1 for holding the anchor bolt 3 has the screw portion 30 of the projecting portion 3A as shown in FIG.
And a cylindrical base cylinder 31 having a diameter larger than that of the screw portion 30, a non-circular head piece 32 located at the upper end of the base cylinder 31 to facilitate rotation of the base cylinder 31 with fingers, in this example, a rectangular head piece 32. The base portion 31 is provided with a tubular portion 9 having a lower opening, and the nut fitting 33 is integrally welded to the inner hole of the base barrel 31 at the lower portion thereof.

Therefore, the nut hole of the nut fitting 33 causes the screw hole 10 of the cylindrical portion 9 to be screwed with the screw portion 30A at the upper end of the anchor bolt 3.
Is formed.

A lock nut 35 adjacent to the nut fitting 33 below is screwed to the screw portion 30A so that the cylindrical portion 9 can be firmly and firmly screwed to the anchor bolt 3. The lock nut 35 is previously screwed into the screw portion 30, and comes into contact with the nut fitting 35 as the lock nut 35 rotates in the opposite direction.

Therefore, the insertion hole 29 has an outer diameter that allows the lock nut 35 to pass therethrough, and preferably has an outer diameter that fits with the lock nut 35 so that the anchor bolt 3 can be accurately positioned. Further, the cylindrical portion 9 has a diameter larger than that of the insertion hole 29 and is placed on the receiving plate 6 so as to have a high verticality and hold the anchor bolt 3. Further, in the anchor bolt support jig 1, by making the upper end of the anchor bolt 3 abut against the head piece 32, the protruding height of each anchor bolt 3 can be conveniently adjusted.

Further, the joint plate 26 has substantially the same structure as the receiving plate 6 in this example, and side pieces 26B are hung at both ends of the base portion 26A extending between the receiving pieces 25. Also, the base portion 26A has an insertion hole 36 through which the anchor bolt 5 passes.
Are formed with relatively low accuracy. Then, the anchor bolt support jig 2 of the second invention is arranged on the joint plate 26.

The anchor bolt support jig 2 is a rectangular flat plate-like receiving plate in which positioning holes 11 for inserting the anchor bolts 5 are formed at high precision pitch intervals in accordance with the arrangement positions of the anchor bolts 5.
A cylindrical portion 13 for covering the protruding portion 5A of the anchor bolt 5 is attached to each positioning hole 11 so as not to fall out and to be rotatable.

As shown in FIGS. 3 to 4, the cylindrical portion 13 includes a cylindrical base cylinder 40 surrounding the protruding portion 5A and an upper cylindrical portion 13A of a lower opening whose upper end is closed by a knob-shaped head piece 41, and the base cylinder 40. And a lower cylinder portion 13B including a cylindrical base cylinder 42 having substantially the same cross section. Further, the upper cylinder portion 13A and the lower cylinder portion 13B are vertically spaced apart by a nut fitting 43 which extends between the base cylinders 40 and 42 and is concentrically welded to the inner holes thereof.
Are connected integrally with each other.

Therefore, the cylindrical portion 13 can form an annular locking groove 45 by the lower end surface of the upper cylindrical portion 13A, the upper end surface of the lower cylindrical portion 13B, and the side surface of the nut fitting 43, and the positioning hole 11 is formed by the locking groove 45. The cylindrical portion 13 is rotatably attached to the receiving plate 12 so as not to slip off by engaging with the. The attachment can be performed by inserting the nut fitting 43 into the positioning hole 11 when welding the nut fitting 43 and the base cylinders 40 and 42. The tubular portion 13 may be formed of one base tube that passes through the positioning hole 11, and various configurations and means may be employed such that it can be locked so as not to slip off by a snap ring that is fitted to the base tube.

Further, in this example, the positioning hole 11 has a diameter along each ridge of the nut fitting 43, and the gap D is set to be substantially equal to the thickness of the receiving plate 12, so that the gap between the cylindrical portion 13 and the receiving plate 12 is set. Prevents misalignment.

In addition, the cylindrical portion 13 has a screw hole 15 due to the nut hole of the nut fitting 43.
And the screw portions 30B of the anchor bolts 5 passing through the insertion holes 36 and the positioning holes 11 are respectively screwed into the screw holes 15 so that the anchor bolts 5 are accurately pitched to fit the positioning holes 11. And having a high degree of verticality, they are collectively held by the anchor bolt support jig 2 in parallel with each other.

By making the cylindrical portion 13 rotatable, the anchor bolts 5 can be efficiently screwed into the screw holes 15, and the anchor bolt support jig 2 has the above-mentioned anchors in order to screw the anchor bolts 5 more strongly. Similar to the bolt support jig 1, a lock nut 46 is screwed next to the nut fitting 43.

Further, in this example, the lower end of the tubular portion 13 is placed on the joint plate 26, so that the receiving plate 12 is held between the molds 20 via the joint plate.

[Effect of device]

As described above, in the anchor bolt support jig of the present invention, the protruding portion of the anchor bolt is covered with the base cylinder provided with the screw hole to be screwed into the anchor bolt. Preventive work can be eliminated and work efficiency can be improved. Moreover, since the lock nut that is previously screwed into the screw portion comes into contact with the nut fitting that forms the screw hole, the anchor bolt can be firmly screwed with a simple operation without rattling, and the verticality of the anchor bolt can be increased. It is possible to position with a high degree of accuracy while increasing the height, and the head piece provided at the upper end of the base cylinder allows the base cylinder to be easily rotated with fingers, which improves the usability.

Particularly, in the second invention, since the base cylinder is attached to each positioning hole, a plurality of anchor bolts can be held with a highly precise pitch arrangement corresponding to the positioning holes and with high parallelism.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
FIG. 3 is an enlarged sectional view showing the invention of FIG. 3, FIG. 3 is an exploded perspective view showing the second invention, FIG. 4 is a sectional view showing a part thereof, and FIG. 5 is a sectional view showing a conventional technique. 3, 5 ... Anchor bolt, 3A, 5A ... Projection part, 6, 12 ... Receiving plate, 9, 13 ... Cylindrical part, 10, 15 ... Screw hole, 11 ... Positioning hole,
20 ... Formwork, 30,30A, 30B ... Screw part, 31,40,42 ... Base cylinder,
32, 41… Head piece, 33, 43… Nut fittings, 35, 46… Lock nut.

Claims (2)

[Scope of utility model registration request] 1. A support jig for anchor bolts which is arranged side by side and which is arranged on a receiving plate through which the anchor bolts pass, straddling the upper end of a formwork in which concrete is placed, and which projects above the receiving plate. In the base cylinder having a diameter larger than that of the anchor bolt and covering the threaded portion of the anchor bolt, a screw hole having a small height is formed below the base tube and is screwed into the threaded portion of the anchor bolt. Provided with a nut fitting to which a lock nut screwed in advance on the portion abuts as it rotates in the opposite direction, and a non-circular head piece located at the upper end of the base cylinder that facilitates rotation of the base cylinder with fingers. Anchor bolt support jig. 2. A support jig for anchor bolts, which is arranged between juxtaposed and is held between upper ends of a formwork in which concrete is placed, and is arranged on a support plate through which the anchor bolts pass, the support jig comprising: It covers the threaded portion of the anchor bolt projecting above the receiving plate through a positioning hole formed in accordance with the arrangement of the anchor bolt, has a diameter larger than the threaded portion, and cannot be slipped out and is rotatably mounted in the positioning hole. In the base tube,
A nut fitting which is located below the base cylinder and has a small height screwed into the threaded portion of the anchor bolt, and a lock nut previously screwed into the threaded portion abuts with rotation in the opposite direction. An anchor bolt support jig, which is provided with a non-circular head piece that is located at the upper end of the base cylinder and facilitates rotation of the base cylinder with fingers.