JP4190520B2 - Anchor bolt installation tool and anchor bolt installation method - Google Patents

Description

  The present invention relates to an anchor bolt installation tool used when an anchor bolt is installed on a reinforced concrete structure through a ceiling panel, for example, and an installation method thereof.

  Ceilings of reinforced concrete structures in public facilities such as schools and subways, companies, and factories have ceiling panels made of gypsum board. Normally, when installing cables and pipes on the ceiling of these facilities or installing air conditioning equipment, anchor bolts are embedded in reinforced concrete structures and these equipment are suspended via these anchor bolts . Anchor bolts are installed when constructing reinforced concrete structures, and ceiling panels are stretched after installation.

However, in some cases, it is necessary to install the cables and pipes as described above on a reinforced concrete structure with a ceiling panel already installed. Conventionally, when anchor bolts are installed on a reinforced concrete structure with a ceiling panel stretched in this way, the installation work has been performed without peeling off the ceiling panel. As an example of the work, first, a through hole having a predetermined diameter is formed in the ceiling panel with a hammer drill in which a core bit is set. Next, set a long drill bit of 1 m or longer on the hammer drill, insert the drill bit from the through hole opened in the ceiling panel, and use the hammer drill to make an anchor hole for anchoring into the reinforced concrete structure Open. Furthermore, set the anchor at the tip of the long anchor driving rod, insert the anchor driving rod through the through hole of the ceiling panel, search for the previously drilled anchor hole in the state of groping, and use the anchor as the anchor hole. The anchor is driven into the anchor hole by the vibration of the hammer drill. However, an operator may drive the anchor into the anchor hole using only the anchor driving rod without using a hammer drill. Finally, the anchor bolt is inserted through the through hole of the ceiling panel, and the anchor bolted in the same manner is searched for, and the anchor bolt is screwed into the anchor to complete the installation.
JP 2003-340262 A

  However, in this conventional anchor bolt installation method, when the anchor hole is drilled in the reinforced concrete structure on the ceiling side, the anchor hole must be drilled so that the anchor bolt can be hung vertically. Drilling an anchor hole with a long drill bit in a blocked state is a difficult task.

  Furthermore, when the anchor is driven into this anchor hole, the anchor hole is blocked by the ceiling panel and cannot be seen at all. Therefore, set the anchor at the tip of the anchor driving rod, and in a completely groping state, You have to find the small anchor hole you opened. The process of finding the anchor hole while holding the anchor driving rod upward is a time-consuming and troublesome operation, and is a considerable labor.

  Furthermore, when the anchor bolt is screwed in after the anchor has been driven into the anchor hole, the male screw at the tip of the anchor bolt must be screwed into the anchor previously driven into the anchor hole. This is also a troublesome task.

  The present invention is intended to solve the conventional problems as described above, and provides an anchor bolt installation tool and an anchor bolt installation method capable of easily installing an anchor bolt on a reinforced concrete structure through a ceiling panel. It is intended to do.

  In order to achieve the above object, the anchor bolt installation tool of the present invention comprises a guide body installed between a ceiling panel and a concrete structure, a guide holding body for inserting and holding the guide body, and the guide holding body. And a support stand for supporting.

  The guide body is inserted and held in the guide holder. The guide holder is held and fixed to the ceiling panel by a support stand. An anchor hole is drilled in a concrete structure using a guide body, the anchor is driven into the anchor hole, and an anchor bolt is attached to the anchor.

  Furthermore, the anchor bolt installation tool of the present invention includes a tool stand that supports an electric tool such as a hammer drill so as to be slidable in the vertical direction. Since the hammer drill is supported by this tool stand, it is not necessary for the operator to hold the power tool and work.

  In the anchor bolt installation method of the present invention, a through-hole is provided in the ceiling panel, a guide body is installed between the ceiling panel and the concrete structure, and an anchor hole is drilled through the guide body to the anchor hole. Insert the anchor and attach the anchor bolt to the anchor.

  By the guide body, drilling of the anchor hole, driving of the anchor into the anchor hole, and attachment of the anchor bolt to the anchor are smooth.

  According to the present invention, an anchor bolt can be easily installed on a reinforced concrete structure through a ceiling panel.

[Embodiment 1]
Embodiment 1 of the present invention will be described below with reference to the drawings.
1 is a front view in which an anchor bolt installation tool is installed at the construction site of Embodiment 1, FIG. 2 is a partially enlarged view of FIG. 1, FIG. 3 is a view taken along line AA in FIG. FIG. 5 is a work process diagram for installing anchor bolts.

  In FIG. 1, 1 is a reinforced concrete structure, 2 is a ceiling panel, and 3 is a floor. An anchor bolt installation tool 4 is installed between the reinforced concrete structure 1 and the floor 3. The anchor bolt installation tool 4 includes a guide body 8 for guiding construction tools such as a drill bit 6 and an anchor driving rod 7 of a hammer drill 5 to the reinforced concrete structure 1 side, and a tip of the guide body 8 at the reinforced concrete structure 1 A support holder 10 that holds the guide body 8 and the guide holder 9 by supporting the guide holder 9 from below and pressing the guide holder 9 against the ceiling panel 2. It has. However, the term “anchor bolt installation tool 4” is not limited to the above-described configuration, and may be used including a tool stand 11 that slidably fixes a hammer drill 5 described later in a vertical direction.

  The guide body 8 uses a cylindrical pipe made of synthetic resin. Specifically, a hard vinyl chloride pipe (HIVP 13 m / m) was used. The reason why 13 m / m was used is to be able to cope with an anchor of 3 minutes (9 mm) and an anchor of 4 parts (12 mm). The material of the guide body 8 is not particularly limited to synthetic resin, and may be a metal pipe such as aluminum or copper. The construction of the guide body 8 is such that a double-sided tape 28 made of sponge is applied to the upper end of the construction as shown in the lower left partial perspective view of FIG. 5A and the upper end is adhered to the reinforced concrete structure 1. The lower end projects through the ceiling panel 2 and protrudes toward the indoor space 12 such as a room or a hallway. It is preferable to prepare a long guide body 8 that can be cut according to the distance between the reinforced concrete structure 1 and the ceiling panel 2 at the construction site. The diameter of the guide body 8 should be such that the drill bit 6 of the hammer drill 5, the anchor driving rod 7 and the anchor bolt 13 can be sufficiently inserted, and the drilling operation of the anchor hole 14 and the anchor driving operation can be facilitated. I must. The cross-sectional shape of the guide body 8 is preferably a circular shape, but is not limited to a circular shape, and the cross-sectional shape is not limited as long as it can function as a polygon or an ellipse such as a quadrangle or a pentagon or a guide.

  The guide holder 9 that holds the guide body 8 has a disc-shaped presser plate 16 attached to one end of the cylindrical holder body 15 (on the lower end side in FIG. 2). The holding body 15 and the presser board 16 are made of metal, and the holding body 15 is inserted into the center of the presser board 16 and welded thereto. The presser board 16 is attached to the holder main body 15 so that the presser board 16 is perpendicular to the central axis of the holder main body 15. A wing screw 17 for fixing the guide body 8 fitted in the holder body 15 to the guide holder 9 is attached to one end of the holder body 15. It is preferable that the holding body 15 has such a diameter that the guide body 8 can be inserted therethrough and the guide body 8 does not rattle in the holding body 15. The length of the holding body 15 must be a length that can stably hold the guide body 8 on the ceiling panel 2.

  The support stand 10 is a long pipe-shaped support 18, and a support 19 is attached to the upper end of the support 18, and a spiral spring 20 is attached to the lower end. The length of the column 18 of the support stand 10 can be changed according to the height from the floor 3 to the ceiling panel 2 at the construction site. In this embodiment, the upper end side and the lower end side can be extended. it can. That is, the upper extension 22 and the lower extension 23 are slidably fitted in the central portion 21 of the support column 18, and the upper extension 22 and the lower extension 23 are inserted and removed to make it look like a fishing rod. The length can be changed freely. Although not shown, the central portion 21 may be further divided into two parts and connected by a turnbuckle-type connector.

  The support stand 10 may be replaced with an existing laundry basket. When the upper extension 22 or the lower extension 23 is extended or contracted, the extension 22 or 23 is placed on the right or left side. Rotate in the loosening direction, extend to a predetermined length, and fix it by rotating in the opposite direction to the previous one.

  Fixing brackets 24 and 25 are attached to the upper extension part 22 and the lower extension part 23, respectively. The fixing brackets 24 and 25 surround the cylindrical extending portions 22 and 23, and both end portions 26 extending from the surrounding C-shaped portion are tightened with a thumbscrew 27, and the fixing brackets 24 and 25 are extended to the extending portions 22 and 23. Firmly fix to. The fixing brackets 24 and 25 are fixed to the extending portions 22 and 23 so that the upper extending portion 22 and the lower extending portion 23 do not enter the central portion 21 of the support column 18 even when a force is applied from the vertical direction. Fulfill.

  The spiral spring 20 is attached to the lower end portion of the support stand 10 as described above. The spring 20 urges the column 18 toward the ceiling panel 2, and the support portion 19 at the tip of the support stand 10 presses and holds the presser plate 16 of the guide holder 9 against the ceiling panel 2. The urging force of the spring 20 requires a resilient force that allows the support stand 10 to stand upright to hold the guide holder 9 and the guide body 8, and in this embodiment, has a resilient force of 5 kg-9 kg. I used something.

  As shown in FIG. 3, the support portion 19 includes an arm portion 28 having a C-shaped tip, and a fixing bracket 29 for attaching the arm portion 28 to the tip portion of the support stand 10. The arm portion 28 is made of metal, but a rubber protective cap 30 is fitted into the C-shaped tip portion so that the presser plate 16 can be pressed from below so that the arm portion 28 does not slip softly. . As shown in FIG. 3, the fixing bracket 29 has a ring portion 33 fitted into the distal end portion of the support stand 10 and both end portions 34 of the ring 33 extending in parallel with each other, and a bolt 31 and a nut 32 between the both end portions 34. The support portion 19 is configured to be fastened and fixed to the tip portion of the support stand 10. As shown in FIG. 1, the arm portion 28 has an inverted L shape so that the C-shaped tip end portion is positioned above the tip end of the column 18.

Next, the construction method of the anchor bolt installation tool will be described.
First, before starting construction, the upper extension portion 22 and the lower extension portion 23 of the support stand 10 are extended to be slightly longer than the distance between the floor 3 and the ceiling panel 2. The length between the spring 20 is adjusted. Then, a core bit (not shown) is set on the rotating shaft of the hammer drill 5, and a through hole 35 is opened with the hammer drill 5 at a position where the anchor bolt 13 of the ceiling panel 2 is installed.

  The guide holder 9 is inserted into the through-hole 35 of the ceiling panel 2 so that the presser plate 16 faces downward, and the spring 20 of the support stand 10 prepared as described above is pressed against the floor 3 while being pressed against the floor 3. , And the presser 16 of the guide holder 9 is supported by the support part 19 of the support stand 10 while being pressed against the bottom or the ceiling panel 2 while reducing the length of the support stand 10.

  After fixing the guide holding body 9 to the ceiling panel 2 as described above, it is measured whether or not the guide body 8 is set perpendicular to the reinforced concrete structure 1. Since the presser plate 16 is attached so as to be perpendicular to the holding body 15 as described above, if the ceiling panel 2 is horizontal, the guide holding body 9 is inserted into the through hole 35 of the ceiling panel 2. When the presser plate 16 is brought into contact with and supported by the ceiling panel 35, the guide body 8 should be installed vertically. However, since there is a possibility that the guide body 8 is installed obliquely with respect to the reinforced concrete structure 1 for some reason, it is preferable to confirm using a laser measuring instrument.

  Therefore, the guide body 8 is inserted into the holder body 15 of the guide holder 9 and the thumbscrew 17 is tightened so that the guide body 8 protrudes from the holder body 15 by an appropriate length (for example, about half). The laser measuring instrument projects one laser beam toward the ceiling and the wall surface, and the light trace of one vertical laser beam as a reference is also applied to the portion of the guide body 8 located below the ceiling panel 2. It is possible to easily determine whether or not the guide body 8 is installed vertically by measuring whether or not the guide body 8 is deviated from the vertical reference laser beam. If measurement by this laser measuring instrument is performed at least at two points at different positions, it can be accurately confirmed whether or not the guide body 8 is vertical.

  The guide body 8 is once pulled out from the guide holding body 9, and a sponge double-faced tape 28 is affixed to the upper end of the guide body 8 as shown in the partial left perspective view of FIG. Then, again, the guide body 8 is inserted into the holding body 15 of the guide holding body 9 and is inserted until the tip of the guide body 8 contacts and adheres to the reinforced concrete structure 1. Then, the wing screw 17 of the guide holder 9 is tightened to fix the guide body 8 to the guide holder 9. If the guide body 8 is too long and protrudes considerably from the guide holding body 9, the guide body 8 is fixed to the guide holding body 9 by cutting at an appropriate length and then inserting it again.

  After setting the anchor bolt installation tool 4 as described above, after setting the drill bit 6 on the rotation shaft of the hammer drill 5, the drill bit 6 is inserted into the guide body 8. The tip of the drill bit 6 is abutted against the reinforced concrete structure 1, and at first, drilling is started while the hammer drill 5 is slowly rotated. The double-sided tape 28 at the upper end of the guide body 8 prevents the guide body 8 from shifting due to the vibration of the hammer drill 5.

  After the hole mark is made in the concrete structure 1, the number of rotations of the hammer drill 5 is increased and the anchor hole 14 is opened as shown in FIG. The drilling of the anchor hole 14 is performed while the operator holds the hammer drill 5.

  Next, the anchor driving rod 7 is attached to the hammer drill 5, and the anchor 36 is set at the tip of the hammer drill 5. The anchor driving rod 7 is inserted into the guide body 8, the anchor hole 36 is directed to the anchor hole 14 opened as described above, and the hammer drill 5 is driven to move the anchor hole 14 as shown in FIG. The anchor 36 is driven into. The guide body 8 can accurately guide the tip of the anchor driving rod 7 to the anchor hole 14.

  After the anchor 36 has been driven into the anchor hole 14, the anchor driving rod 7 is extracted from the guide body 8, and the anchor bolt 13 is inserted into the guide body 8 instead (FIG. 5C). Then, the male screw of the anchor bolt 13 is screwed into the female screw of the anchor 36 that has been previously driven, and the anchor bolt 13 is suspended from the reinforced concrete structure 1. Also at this time, the tip of the anchor bolt 13 can be accurately guided to the anchor hole 14.

  After the anchor bolt 13 is installed on the reinforced concrete structure 1 as described above, the thumbscrew 17 of the guide holder 9 is loosened and the guide body 8 is removed from the guide holder 9. Further, while pressing the support stand 10 against the floor 3, the support portion 19 of the support stand 10 is lowered downward to release the pressing of the guide holder 9 against the ceiling panel 2 of the presser plate 16, and simultaneously removing the support stand 10. The guide holder 9 is extracted from the through-hole 35 of the ceiling panel 2 and the through-hole 35 is blinded to complete the installation of the anchor bolt 13.

  As described above, the anchor bolt 13 is installed on the ceiling. When the anchor hole 14 is opened in the reinforced concrete structure 1, the drill bit 6 is guided in the vertical direction by the guide body 8 that is accurately installed in the vertical direction. Since the anchor hole 14 is opened, there is no installation error such that the anchor bolt 13 is inclined when the anchor bolt 13 is suspended.

  Furthermore, when the anchor 36 is driven into the anchor hole 14, the guide body 8 guides the tip of the anchor driving rod 7 to the anchor hole 14, so that the anchor driving rod 7 does not search for the anchor hole 14 in a groping state. The anchor 36 can be easily driven into the anchor hole 14.

  Further, when the anchor bolt 13 is screwed into the anchor 36, the guide body 8 guides the anchor bolt 13 to the anchor 36. In this case as well, it is absolutely necessary to search for the anchor 36 driven by the anchor bolt 13 in a groping state. Absent.

As described above, according to the present invention, the anchor bolt 13 can be installed on the reinforced concrete structure 1 very easily and accurately. Furthermore, conventionally, the installation work has required at least two people, but in this method, the anchor bolt 13 can be installed on the reinforced concrete structure 1 by one person. Furthermore, the anchor bolt installation tool 4 is inexpensive to manufacture and easy to manufacture.
[Embodiment 2]
FIG. 6 is a schematic front view of the anchor bolt installation tool of the second embodiment. Since the guide body 8, the guide holding body 9, and the support stand 10 are the same as those in the first embodiment, the same reference numerals are used in the drawings and the details are omitted.

  The second embodiment is different from the first embodiment in that a tool stand 11 for supporting the hammer drill 5 so as to be slidable in the vertical direction is provided. Although the tool stand 11 is not shown, the cross-sectional shape of the stand main body 40 is a channel shape, and a slide body 41 is slidably fitted in the main body 40 in the vertical direction. The base is attached. A fixed pulley 42 is provided on the upper part of the tool stand 11, a manual winch 43 is provided on the lower part, one end of a wire 44 is connected to the upper end of the slide body 41, and the wire 44 is connected via the fixed pulley 42. Is wound up by the winch 43. A spring 45 is interposed in the middle portion of the wire 44.

  First, the installation tool 4 is installed. The installation method of the guide body 8, the guide holding body 9, and the support stand 10 is the same as that of the first embodiment. Then, as shown in FIG. 6, the tool stand 11 is installed, the drill bit 6 is inserted through the guide body 8, and then the drill bit 6 is attached to the hammer drill 5. While the winch 43 is being wound up, when the tip of the drill bit 6 comes into contact with the reinforced concrete structure 1, the winding of the winch 43 is stopped and fixed, and the drill bit 5 of the hammer drill 5 is rotated slowly to smoothly rotate. To check. If it can be confirmed that the drill bit 6 rotates smoothly, the winch 43 is wound up slightly stronger so that a hole mark of the drill bit 6 is formed.

  When the hole mark is made, the rotation speed of the drill bit 6 is increased and the winch 43 is gradually wound up. The drill bit 6 is always urged upward by a spring 45 provided in the middle portion of the wire 44 to press the drill bit 6 against the reinforced concrete structure 1 side. Therefore, if the winch 43 is wound up with a predetermined force, The anchor hole 14 can be opened by the force of the spring 45. When the anchor hole 14 becomes deep and the urging force of the spring 45 is insufficient, the winch 43 is further wound up. When the anchor hole 14 is opened as shown in FIG. 5A, the winch 43 is loosened, the slide body 41 is lowered, and the drill bit 6 is removed from the guide body 8.

  Next, after the anchor driving rod 7 in which the anchor 36 is set instead of the drill bit 6 is attached to the hammer drill 5, the winch 43 is wound up again to introduce the anchor driving rod 7 into the guide body 8 and into the anchor hole 14. The anchor 36 at the tip of the anchor driving rod 7 is attached. Further, the winch 43 is strongly wound up and driven by the hammer drill 5, and the anchor 36 is driven into the anchor hole 14 as shown in FIG.

Since the process after screwing the anchor bolt 13 into the anchor 36 in FIG. 5C is the same as that of the first embodiment, the details are omitted.
In the second embodiment, the hammer drill 5 can be attached to the tool stand 11 and the anchor hole 14 can be drilled or the anchor 36 can be driven into the anchor hole 14, so that the operator can point the hammer drill 5 upward. Since it is not necessary to work while holding, the burden on the operator can be reduced.

  Although the hammer drill 5 according to the second embodiment is wound up by the winch 43, the stand 11 of the present invention is not limited to such a configuration, and instead of the winch 43, the hammer drill 5 is slid upward with a weight. May be. Moreover, the structure which slides the slide body 41 with the force of a motor may be sufficient.

  In the second embodiment, the tool stand 11 may be substituted for the support stand 10. That is, the support stand 19 of the support stand may be provided at the upper end of the tool stand 11 so as to be biased upward by the spring, and the presser plate 16 of the guide holder 9 may be held.

  The anchor bolt installation tool and the anchor bolt installation method of the present invention can be used for installation work in which the anchor bolt 13 is installed on the reinforced concrete structure 1 on which the ceiling panel 2 is stretched.

It is the front view which installed the anchor bolt installation tool of Embodiment 1 of this invention. It is the elements on larger scale of FIG. It is an AA arrow directional view of FIG. It is the front view which showed the operation | work which opens an anchor hole in a reinforced concrete structure. It is an operation process figure which installs an anchor bolt. It is the front view which installed the anchor bolt installation tool of Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reinforced concrete structure 2 Ceiling panel 3 Floor 4 Anchor bolt installation tool 5 Hammer drill 6 Drill bit 7 Anchor driving rod 8 Guide body 9 Guide holding body 10 Support stand 11 Tool stand 12 Indoor space 13 Anchor bolt 14 Anchor hole 15 Holding Body body 16 Presser board 17 Thumb screw 18 Post 19 Support part 20 Spring 21 Center part 22 Upper extension part 23 Lower extension part 24 Fixing bracket 25 Fixing bracket 26 Both ends 27 Butterfly screw 28 Arm part 29 Fixing bracket 30 Protective cap 31 Bolt 32 Nut 33 Ring portion 34 Both ends 35 Through hole 36 Anchor 40 Stand body 41 Slide body 42 Fixed pulley 43 Winch 44 Wire 45 Spring

Claims (3)

An anchor bolt installation tool comprising a guide body installed between a ceiling panel and a concrete structure, a guide holder for inserting and holding the guide body, and a support stand for supporting the guide holder. The anchor bolt installation tool of Claim 1 provided with the tool stand which supports electric tools, such as a hammer drill, so that a slide to an up-down direction is possible. A through hole is provided in the ceiling panel, a guide holder is inserted and held in the through hole, and the guide body is installed between the ceiling panel and the concrete structure via the guide holder, and the anchor hole is formed by the guide body. An anchor bolt installation method comprising drilling, driving an anchor into an anchor hole, and attaching an anchor bolt to the anchor.

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