JPH10168893A - Anchor bolt posture holding body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold the posture and position of an anchor bolt when buried by providing a plurality of through-holes on a posture holding body to be hooked on the anchor bolt so that preforming concrete of a foundation is extruded from under and mutually fitted on the surface. SOLUTION: A posture holding body 1 is formed of a square plate having four through-holes 8 each in four positions, a hook hole 3 hooked with the shaft of an anchor bolt, and a slit 4, and it is manufactured by pouring plastic into a fixed die. The upper surface of preforming concrete poured into a wood frame for constructing a foundation is leveled, and the lower part of the anchor bolt integrated with the posture holding body 1 is buried. The degree of burying is regulated by utilizing the buoyancy of the posture holding body 1 so that the concrete of bed is swollen and extruded through the through-holes 8. When the concrete is solidified, top end finishing concrete is applied so as to shield the whole posture holding body 1. Thus, the anchor bolt can be fixed to the foundation while keeping prescribed position and posture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a posture holder such as an anchor bolt used in foundation work at a construction site and a method of using the same.

[0002]

2. Description of the Related Art As is well known, anchor bolts are used for fixing one structure to another structure like a concrete foundation and a wood base. For this reason, when anchor bolts are buried in one structure such as a foundation,
It is necessary to fix to the correct position and posture calculated in advance. Conventionally, various proposals have been made for fixing an anchor bolt. For example, there is a method of fixing an anchor bolt proposed in JP-A-57-81596 or JP-A-57-81597. This is to put in advance a bag filled with quick-setting adhesive into the drilling in the structure such as the foundation, then embed anchor bolts in the drilling,
At this time, the bag is broken and the fast-setting adhesive sealed inside fixes the anchor bolt in the hole. The above-mentioned method has a problem that an operation of making a hole in the foundation is necessary, and an operation of putting a bag after making the hole is necessary. As a method for solving the above-mentioned problem, a “posture holding body used for anchor bolts or the like” shown in Japanese Utility Model Application Publication No. 1-38161 has been devised. By using this posture holder, the anchor bolts could be embedded in the liquid concrete before the concrete poured to form the foundation was still solidified, so that extra steps such as drilling could be omitted. FIG. 15 shows an example of a conventional posture holding body such as an anchor bolt shown in Utility Model Application Advertising No. 1-38161. The posture holding body (1) is provided with a hooking hole (3) provided for allowing the anchor bolt to pass through the planar contact body (2), and is substantially hooked during the penetrating operation so that the anchor bolt can easily pass through the hooking hole. A slit (4) is provided to widen the hole. FIG. 16 shows FIG.
5 shows a conventional example in a state where the posture holding body indicated by No. 5 is attached to an anchor bolt. A posture holder is attached to the shaft of the anchor bolt (5) like a sword flange. The anchor bolt has a thread (6) and a bend (7). An anchor bolt below the position where the posture holding body including the bent portion is attached is embedded in a foundation made of concrete or the like. And the upper part including the screw part protrudes from the foundation.

[0003]

As described above, the conventional method of embedding anchor bolts by drilling a part of a concrete foundation once manufactured has a problem that the number of steps increases. On the other hand, the anchor bolt fixing method using the posture holder shown in FIGS. 15 and 16 is a method in which anchor bolts are buried before the concrete is solidified, thereby greatly reducing the man-hour for burying. This is a method in which the anchor bolt is held in the correct position and posture by the buoyancy of the posture holding body and the concrete is solidified. However, this method also has some problems. One problem is that the height around the anchor bolt rises by the thickness of the posture holding body. In general, the posture holding body is left on the upper surface of the concrete foundation as an integral body with the anchor bolt. In this case, however, the posture holding body rises by the thickness of the posture holding body. In a normal construction method, concrete is poured in two stages for manufacturing a foundation. That is, roughing and top end finishing (leveler work). First, as a roughing stage, concrete is poured and leveling work is performed to make the height uniform. Immediately after that, the anchor bolt provided with the posture holding body is floated at a predetermined position on the foundation. After the concrete is solidified, a small amount of concrete is poured again as a top finish (leveler work). This top end finish (leveler work)
The concrete at this time has a low viscosity, so it spreads evenly like water. Although a small amount of concrete for top-end finishing (leveler work) is preferable, a considerable amount of concrete is required to cut and uniform the thickness of the posture holder. When the material of the posture holding body is a plastic material, it is not well-adapted to concrete, and there is a concern that the concrete at the top end (leveler work) may crack. Regarding the control of the position and the posture, the accuracy of the conventional anchor bolt mounting method was not high. In the method of drilling after solidification, the accuracy of the position and posture becomes considerably poor unless the sitting state of the anchor bolt in the hole is adjusted over time. Even with the method using a posture holder, the viscosity of rough-cast concrete is extremely low, and when the weight ratio of the bent portion of the anchor bolt is high, the problem of slight inclination or displacement during the concrete solidification is a problem. It becomes obvious.

[0004]

According to the present invention, in addition to the function of holding the posture and the buried position of the anchor bolt and the like when the fixing bracket such as the anchor bolt is buried in the concrete foundation, the present invention provides an anchor bolt posture holder. A planar contact body, which is a plate-shaped posture holding body engaged with the anchor bolt main body, includes a plurality of through holes separately from the hole used for the engagement,
Or additionally provided with a confirmation hole for observing a bent portion of the anchor bolt, or a function and an anchor bolt for retaining the posture and the buried position of the anchor bolt when embedding a fixing bracket such as an anchor bolt in a concrete foundation. In addition to providing a plurality of through holes separately from the hole used for the engagement, the planar contact body, which is a plate-shaped posture holding body engaged with the main body, includes a nut portion, a pressing portion, and an arm portion that couples both. And a nut part of the holding part is connected to a screw part of the anchor bolt during a process until the concrete is solidified by embedding the anchor bolt in the concrete foundation, and the pressing part is formed in the planar shape. When embedding a fixture such as an anchor bolt in a concrete foundation, In addition to providing a plurality of through-holes in addition to the function of holding the posture and the buried position of the car bolt and the like and the planar contact body which is a plate-like posture holding body hooked on the anchor bolt main body in addition to the hole used for the hooking, A cap for checking the position and / or posture of the anchor bolt by contacting or approaching with the water thread for position confirmation, or when embedding fixing hardware such as anchor bolts in a concrete foundation In addition to the function of holding the posture and the buried position of the anchor bolts and the like, the position of the posture holder is placed on a screw groove of the anchor bolt on a plate as a posture holder, and the thread is placed on the water thread. It is characterized by having a water thread groove for maintaining the posture.

[0005]

According to the posture holding body of the anchor bolt of the present invention, the surface contacting body of the posture holding body is provided with holes of a suitable size and arrangement separately from the engaging holes, so that the rough concrete can be removed. The purpose is to increase the contact area with the concrete at the top end (leveler work) and to function to stop the posture and position of the anchor bolts that are in a floating state until the hardened concrete solidifies. Furthermore, the function of confirming the position of the bent part with respect to the anchor bolt whose center of gravity is off the axis of its own linear part due to having the bent part, and positioning the bent part at a predetermined position with respect to the posture holder In addition, the displacement of the center of gravity when the bent portion is at the above-mentioned position is corrected by adopting a structure in which the buoyancy balance of the posture holding member is adjusted, so that the axis of the straight portion of the anchor bolt is directed vertically. Furthermore, a function for confirming the position and posture of the anchor bolt by contacting or approaching the water line, or additionally, by mounting the posture holder on the water line to fix the position holder by the tension of the water line. As a result, the posture and position of the anchor bolt are maintained.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment corresponding to claim 1 of the present invention will be described with reference to FIG. This embodiment is a posture holder (1) used in a process of embedding anchor bolts in a concrete foundation for building construction. This will be described in comparison with the conventional example shown in FIG. The planar contact body (2) is provided with a through hole (8) in addition to the engaging hole (3) and the slit (4). The roles of the engaging hole and the slit in the engaging operation are the same as those shown in the conventional example. The through-holes were drilled to increase the contact area between the rough ground concrete as the groundwork and the concrete at the top end (leveler work) as the upper ground so that both could be blended well. Hereinafter, the details of the posture holding body of the present invention will be described by describing the step of embedding the anchor bolt. In the foundation of a building, first, wooden frames formed of wooden boards that are parallel to each other and 200 mm apart from each other are arranged at predetermined positions, and rough concrete is poured into the interior formed by the wooden frames. After pouring the roughing concrete, the upper surface is leveled to have a uniform height. Then, a part of the anchor bolt integrated with the posture holding body is buried in the concrete by first holding the anchor bolt at a predetermined position and then slowly moving it downward. When the lower surface of the planar contact body comes in contact with the rough-cast concrete, the buoyancy of the posture holding body causes a resistance to downward movement. When the worker holding the anchor bolt at this stage releases his hand, the anchor bolt stops at a fixed position due to the balance between its own weight and the buoyancy of the posture holding body. The buoyancy of the posture holder is mainly generated by two effects of a difference in specific gravity between the concrete and the posture holder and a surface tension of the concrete surface. The material of the posture holder is plastic, and is manufactured by pouring plastic into a certain mold. In a state where the anchor bolts are stationary while maintaining balance, the concrete of the foundation is extruded from the through holes drilled in this posture holding body so as to swell like a tokoroten, and is extruded from the through holes adjacent to each other. The concrete in contact with each other comes into contact with each other. This state is schematically shown in FIG. 1 (9) (extruded concrete (9)).
The extruded condition of the concrete and the buried condition of the anchor bolt can be adjusted by an operator. Immediately before releasing your hand, push down strongly once and then slightly pull it up.The downward movement in which the upper surface of the posture holder pushes between lower heights than the average upper surface height of roughing concrete After a certain period of time, a large amount of the extruded concrete (9) shown in FIG. 1 is obtained. Adjustment is performed so that the upper surface of the posture holder becomes the average upper surface height of the concrete by a subsequent lifting operation. As shown in FIG. 1, the through holes have a configuration in which four through holes are provided at four locations in a square planar contact body. The length of one side of the square is 100 mm, the plate thickness is 3 mm, and the diameter of the hole to be engaged is 1
The four slits that are 7 mm and orthogonal to each other are 2 mm in width and 20 mm in length. The diameter of the through hole is 12 mm, and the closest distance between the center positions of the four through holes is 15
mm. The distance between the four through-hole groups is such that the closest central position distance between through-holes belonging to different groups is 30 mm. The posture holding body having this size can withstand the viscosity of ordinary rough-cast concrete and the weight of the anchor bolt without having to push it down once and then pull it up slightly before releasing the hand. It is possible to obtain a balance and an appropriate amount of extruded concrete (9) and a stationary height. After confirming that the anchor bolts are partially buried and stationary, wait a few days for the concrete to dry and solidify. After confirming that the concrete is solidified and that the anchor bolts maintain the predetermined position and posture, the foundation is completed by applying the concrete of the top end (leveler work). At the time of the top end (leveler work), the extruded concrete and the top end finish (leveler work) concrete are well mixed, and then the top end finish (leveler work) concrete is concealed so as to hide the entire posture holder. Will be extended. After this step, the base, which is a wooden timber, is placed via a cushioning material, and fixed by nuts.

FIG. 2 shows a second embodiment of the present invention. In the posture holding body shown in FIG.
0). Fig. 16
Has a bent portion (7) as shown in FIG. The bent portion is provided so that the anchor bolt cannot be pulled out from the foundation. Since the forces acting on the anchor bolts are likely to be concentrated even after the building is completed, it is preferable that the bend is buried in a position where there is sufficient foundation concrete around. The posture holding body shown in FIG. 2 includes the planar contact body (2), the engaging hole (3),
In addition to the slit (4), the anchor bend confirmation hole (1
0) is provided. This confirmation hole is a hole having a diameter of 10 mm. When the posture holding body is engaged with the anchor bolt, rotate the anchor bolt and look through this hole to confirm that the bent portion ((7) in FIG. 16) is located at the center.
When embedding the anchor bolt integrated with the posture holding body in the rough-cast concrete, the position of the confirmation hole is determined and stopped on the concrete in consideration of the direction in which the bent portion of the anchor bolt is most preferable in view of strength. Since the anchor bolt has a bent portion, its own center of gravity is not at the axial center of the straight portion. For this reason, there is an inherent danger of tilting when embedded in soft concrete with low viscosity.
The posture holder shown in FIG. 2A takes into consideration the hole diameter and arrangement of the through hole (8) and the hole diameter and arrangement of the anchor bent portion confirmation hole (10), so that the anchor bolt can be embedded in soft concrete. Hard to tilt. Specifically, the total area of the hole near the anchor bending portion confirmation hole with respect to the engaging hole is larger than the total area of the hole on the opposite side. This allows the buoyancy on the opposite side to have sufficient resistance to the moment caused by the bent portion of the anchor. In addition to the total area of the holes, consideration for the moment can also be made by using a modified arrangement of the holes or the shape of the planar contact body.

In FIG. 2A, the planar contact body is rectangular. The length of the long side is longer than the width (200 mm) of the foundation, and the short side is shortened. For example, the long side is 250 mm and the short side is 100 mm. The rectangular shape defines the bent portion of the anchor bolt in the longitudinal direction of the foundation. The consideration of the through hole with respect to the moment is the same as in the case of FIG. In the example of FIG. 2A, the bent portion of the anchor bolt is set to the longitudinal direction of the foundation, but the bent portion can be defined in an arbitrary direction by changing the arrangement of the anchor bent portion confirmation holes. .

FIG. 3 shows a second embodiment of the present invention. A connection projection (11) is further provided on the posture holder shown in FIG. A recess having a shape corresponding to the connection protrusion is also provided, so that a plurality of posture holders can be connected to each other. Although the connection in only one direction is shown in the example of FIG. 3, there is also an example having a connection protrusion for connecting the three posture holders in an L-shape.

FIG. 4 shows a first embodiment according to the third aspect of the present invention. The posture holding body is composed of the planar contact body (2) and the holding component (12). The planar contact body has at least a hook hole. The holding parts are nuts (1
3), a pressing portion (14) and an arm portion (15) for connecting the both. During transportation, the anchor bolt (5), the holding part (12) and the planar contact body (2)
And each is carried separately. When the anchor bolt is buried in the foundation at the work site, first, the anchor bolt is inserted from its screw part (6) direction into the engaging hole of the planar contact body, and then the holding component is inserted in the screw part (6) direction. Attach from. The nut part (13) of the holding part is securely fixed to the screw part (6). The engagement position of the planar contact body can be arbitrarily determined in a field according to the length of the screw portion by determining the fixing position of the nut portion.

Although the embodiment of FIG. 4 shows an example in which the planar contact body and the holding member are separated from each other, there is also an example in which they are integrated. There is an example in which the integrated planar contact body and the holding component can be separated as necessary after fixing the anchor bolt. Pressing part (1
4) The connecting portion between the planar contact body (2) and the planar contact body (2) has such strength as to be cut by rotating the nut (13) with a wrench after the planar contact body (2) is fixed with concrete. There is an example realized by this.

As another embodiment of the present invention, there is also an example in which the holding part (12) is constituted by a nut part (13), a pressing part (14) and an arm part (15) which are respectively separated. There is also an example in which the length of the arm portion (15) is varied and a holding component having an optimal configuration can be configured on site. As shown in FIG. 4, the arm portion has gaps opened in some places so that the anchor bolt can be observed.

FIG. 5 shows a second embodiment of the present invention. The holding part (12) is composed of a nut part (13) having an outer shape rotatable with a wrench, a disc-shaped pressing part (14), and a cylindrical arm part (15). The inner diameter of the hole provided at the center of the arm portion is set larger than the maximum diameter of the anchor bolt. The through-hole (8) provided in the planar contact body is arranged on the outer peripheral portion which is not closed by the pressing portion. Due to this positional relationship, the extruded concrete shown in FIG. 1 does not touch the pressed portion. Holding parts (12)
After confirming that the anchor bolts are fixed with concrete, they are removed at the stage before applying concrete for top-end finishing (leveler work). FIG. 6 shows a sectional view of the second embodiment. It can be seen that the inner wall of the arm (15) is not in contact with the anchor bolt (5).

FIG. 7 shows a third embodiment of the present invention.
The holding part (12 ') of FIG. 7 further includes a cap (16) in addition to the holding part (12) shown in FIG. The cap (16) is coupled above the nut (13). With this configuration, the fixing position of the holding component is always fixed at a fixed distance from the position of the upper end of the anchor bolt screw portion. Thus, the fixed position of the planar contact body is determined at a fixed distance from the upper end of the screw portion.

FIG. 8 shows a first embodiment of a posture holder according to a fourth aspect of the present invention. An anchor bolt (5) is provided with a planar contact body (2) and a positioning cap (17). The positioning cap is a plastic cup-shaped part, and is attached so as to cover the end of the screw portion (6).
The positioning cap is provided with grooves as shown in the figure in the cross direction. With reference to FIG. 9, a method of using the posture holder according to the fifth aspect of the present invention will be described. Before the concrete (18) poured for roughing is solidified, the anchor bolts integrated with the attitude holding body having the structure shown in FIG. 8 are buried side by side as shown in FIG. Then, a colored water thread (19) at a predetermined position is set at a predetermined position, and the center of the groove of the positioning cap (17) is aligned with the colored position. Here, when it is found from the measurement using the water thread that the embedded anchor bolt is displaced from the predetermined position, the anchor bolt is finely moved in the unconsolidated concrete to adjust the position. This position adjustment causes the anchor bolt to move horizontally without tilting. The water thread is stretched in consideration of the protrusion in the height direction of the screw part of the anchor bolt. If it is found that the height of the anchor bolt is deviated from the relative position with the water thread, the height is adjusted by pushing or pulling by hand. After the adjustment work, if it can be confirmed by static observation that the anchor bolt is stationary, it is left for several days for solidification.

FIG. 10 shows an embodiment corresponding to claim 5 of the present invention.
Shown in In FIG. 10, a posture holding body (1 ′) has a hook hole (3 ′) having a thread groove formed in an inner wall thereof and a water thread groove (20).
It is constituted by a plate provided with. The screw groove of the engaging hole (3 ') corresponds to the screw of the screw portion (6) of the anchor bolt (5). FIG. 11 shows a side view (A) and a front view (I) of the posture holding body shown in FIG. As shown in FIG. 11, two to four water thread grooves (20) are provided near each side end.

FIG. 12 is a diagram corresponding to FIG.
An example of how to use the posture holder (1 ′) of FIG. First, a state in which the position of the rough concrete (18) surrounded by the wooden frame (21) with the water thread (19) is determined.
The position of the water thread is stretched so that the anchor bolt is buried in a predetermined position in consideration of the size of the posture holding body and the fixing position to the anchor bolt. There is an example in which the posture holding body and the water thread are removed when the rough concrete is solidified, and the state shown in FIG. 12 may be maintained until the concrete of the top end finishing (leveler work) is applied.

A second embodiment of the present invention will be described with reference to FIGS. This is an embodiment in which an anchor nut (22) as shown in FIG. 13 is embedded in concrete (18). As shown in FIG. 14, when embedding the anchor nut (22) at a predetermined position (illustrated as an anchor nut embedding position (23) in the figure) of the concrete (18) surrounded by the wooden frame (21), the posture is Holder (1 ")
This is an embodiment using. The posture holding body (1 ") is provided with a threaded projection, and is attached in a form to close the screw hole of the anchor nut. In this manner, the anchor nut and the posture holding body are integrated. By embedding the material in unconsolidated concrete, the same effect as described with reference to Fig. 1 occurs.The groove for the water thread is provided in the posture holder (1 ") as shown. ing.

[0019]

By using the posture holder of the present invention, it is possible to fix the anchor bolt and the similar fixing hardware at a predetermined position in concrete in a predetermined posture.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a posture holder according to claim 1 of the present invention.

FIG. 2 is a first view of a posture holder according to claim 2 of the present invention;
It is a front view of the Example of FIG.

FIG. 3 is a perspective view of a second embodiment of a posture holder according to the present invention;
It is a front view of the Example of FIG.

FIG. 4 is a first view of a posture holder according to claim 3 of the present invention.
It is a lineblock diagram of an Example of a.

FIG. 5 shows a second embodiment of the posture holder according to the third aspect of the present invention.
FIG. 3 is a perspective view of the embodiment of FIG.

FIG. 6 is a perspective view of a second embodiment of a posture holder according to the third aspect of the present invention.
It is sectional drawing of the Example of FIG.

FIG. 7 is a perspective view of a third embodiment of a posture holder according to the third aspect of the present invention.
It is sectional drawing of the Example of FIG.

FIG. 8 is a first view of a posture holder according to claim 4 of the present invention.
It is a lineblock diagram of an Example of a.

FIG. 9 is a configuration diagram showing a method of using a posture holding body according to claim 4 of the present invention.

FIG. 10 is a structural view of an embodiment of a posture holding body according to claim 5 of the present invention.

FIG. 11 is a side view and a front view of an embodiment of a posture holding body according to claim 5 of the present invention.

FIG. 12 is a configuration diagram showing a method of using a posture holder according to claim 5 of the present invention.

FIG. 13 is a perspective view of a second embodiment of a posture holder according to the fourth aspect of the present invention.

FIG. 14 is a configuration diagram of a second embodiment of a posture holder according to claim 4 of the present invention.

FIG. 15 is a front view of a conventional posture holding body.

FIG. 16 is a configuration diagram showing a method of using a conventional posture holding body.

[Explanation of symbols]

1 and 1 'and 1 "are posture holding bodies, 2 is a planar contact body, 3 and 3' are hook holes, 4 is a slit, 5 is an anchor bolt, 6
Is a threaded portion, 7 is a bent portion, 8 is a through hole, 9 is extruded concrete, 10 is an anchor bent portion confirmation hole, 11
Is a connection protrusion, 12 and 12 'are holding parts, 13 is a nut part, 14 is a pressing part, 15 is an arm part, 16 is a cap, 17 is a positioning cap, 18 is concrete, 1
9 is a water thread, 20 is a water thread groove, 21 is a wooden frame, 22 is an anchor nut, and 23 is an anchor nut embedding position.

Claims (5)

[Claims] 1. An anchor bolt position holder for holding a position of an anchor bolt or the like and a buried position when a fixture such as an anchor bolt is buried in a concrete foundation, wherein the plate-shaped position holder is engaged with an anchor bolt body. An anchor bolt posture holder characterized in that the planar contact body has a plurality of through holes in addition to the holes used for the engagement. 2. An anchor bolt position holder according to claim 1, further comprising a confirmation hole for observing a bent portion of the anchor bolt. 3. The anchor holder according to claim 1, further comprising a holding part comprising a nut part, a pressing part and an arm part for connecting the nut part and the pressing part, and the anchor bolt being embedded in a concrete foundation. Wherein the nut part of the holding part is connected to the screw part of the anchor bolt and the pressing part is connected to the planar contact body during a process period until the solidification of the anchor bolt. . 4. An anchor bolt position holder according to claim 1, further comprising a position setting cap for confirming the position and / or position of the anchor bolt by contacting or approaching with a water thread for position confirmation. An anchor bolt attitude holder characterized in that: 5. An anchor bolt posture holding body according to claim 4, wherein said planar contact body and a plurality of through holes are not provided in a component part, but instead, a plate as the posture holding body is screwed into a screw portion of the anchor bolt. An anchor bolt posture holder, comprising: a thread groove to be fastened; and a water thread groove to be placed on the water thread to maintain the position and posture of the posture holder.