JP2017025527A - Insert embedding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the assembling performance of a jig for attaching an insert to a mold form to the mold form, and to improve the workability of insert embedding work.SOLUTION: An insert 12 for fixing a fixed member to a concrete structure is embedded by the following processes: (1) a process for inserting a head part 22 of an attachment jig 11 into an attachment hole 18 of a wooden flask 13; (2) a process for pushing a fixed pin 21 which is inserted into a penetration hole of the attachment jig 11 in an axial direction, and fixing the head part 22 to the wooden flask 13; (3) a process for fastening a male screw part 23a formed at a shaft part of the attachment jig 11 to a female screw hole 15 of the insert 12; (4) a process for returning the fixed pin 21 to an original position after placing concrete into the wooden flask 13, releasing the fixation of the head part 22 and the wooden flask 13, and removing the wooden flask 13; and (5) a process for screw-drawing the male screw part 23a from the female screw hole 15, and removing the attachment jig 11 from the insert 12.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method for embedding an insert for fixing a member to be fixed to a concrete structure in the concrete structure.

  As is well known, a ceramic insert is embedded in a concrete structure such as a concrete wall or ceiling of a tunnel or a box culvert, and a desired fixed member is fastened to the insert.

  This insert is previously attached to the inside of the formwork before placing the concrete. At this time, a general insert is attached to the mold by screwing a fixing bolt into a female screw hole formed in the axial direction.

  Explaining this work process, first, one of the two workers enters the inside of the mold and holds the insert so that the mounting holes of the mold and the female screw holes are aligned. Next, the other worker on the outside of the mold allows the fixing bolt to be screwed into the female screw hole through the mounting hole and attaches the insert to the mold in a cantilevered manner.

  After that, the concrete is placed in the mold, and after the concrete is hardened, the fixing bolt is removed and the insert is embedded in the concrete. A fixed member such as a support bolt for scaffolding or a suspension bolt for ceiling is fastened to the female screw hole of the embedded insert.

  However, when using conventional fixing bolts, two workers are required at the time of construction, so one worker cannot perform the construction, and there is room for improvement in worker placement efficiency. The insert of patent document 1 is proposed in order to improve this.

  Referring to FIG. 12, the outline of the insert 1 includes an insert body 3 having a female screw hole 2 and sleeves 5a and 5b in which communication holes 4a and 4b communicating with the female screw hole 2 are formed in the axial direction. A plastic holder (attachment jig) 8 is detachably attached to the mold 6. The plastic holder 8 includes a male screw portion 9 at one end and a stopper 10 at the other end, and the stopper 10 includes a pair of stopper pieces 10a that can be elastically deformed.

  As a method for embedding the insert 1, the male screw portion 9 is inserted into the female screw hole 2 through the communication holes 4 a and 4 b, and then the stopper 10 is inserted into the mounting hole 7. At this time, the tip of the stopper piece 10 a comes into contact with the outer surface of the mold 6 to prevent the plastic holder 8 from coming off, and the insert 1 is attached to the mold 6. Thereafter, concrete is placed in the mold 6, and after drying the concrete, the plastic holder 8 is rotated with a tool to loosen the fastening between the two 2 and 9, and the plastic holder 8 is removed.

JP 2003-27597 A

  Certainly, according to Patent Document 1, the stopper piece 10 a is prevented from coming off and the insert 1 is attached to the mold 6.

  However, the stopper piece 10a is weakly assembled to the mold 6, so that when the male threaded portion 9 is to be screwed into the female threaded hole 2 after the stopper 10 is inserted into the mounting hole 7, the insert body 3 is rotated. The plastic holder 8 turns around.

  This requires a worker who holds the stopper 10 on the outside of the mold 6, and the placement efficiency of the worker cannot be improved, which may make it difficult to improve the insert burying work.

  The present invention is made in order to solve such a conventional problem, and it is an object to improve the workability of insert embedding work by improving the assembling property of the jig for attaching the insert to the formwork to the formwork. It is said.

  The present invention is a method of embedding an insert for fixing a member to be fixed to a concrete structure in a concrete structure using a mold and an attachment jig, wherein the head of the attachment jig is A first step of inserting into the mounting hole of the mold, a second step of pressing the fixing pin inserted into the axial through hole of the mounting jig and fixing the head to the mold, and A third step of fastening a male screw portion formed on the shaft portion of the mounting jig to the female screw portion of the insert; and returning the fixing pin to its original position after placing concrete in the mold, and And a fourth step of releasing the fixing of the mold and removing the mold, and a fifth step of screwing the male screw part from the female screw part and removing the mounting jig from the insert. .

  In one aspect of the second step, the outer periphery of the divided portion divided by the slit of the head is pressed against the inner periphery of the mounting hole when the fixing pin is pushed. At this time, it is good also as a structure which the engagement tooth formed in the outer periphery of each said division part engages with the inner periphery of the said attachment hole, when the said fixing pin is pushed in.

  In another aspect of the second step, the mold is sandwiched between a divided portion divided by a slit of the head when the fixing pin is pushed in and an annular flange portion formed in the shaft portion. .

  One aspect of the fifth step is a step of engaging the engagement portion of the tool with the engaged portion formed on the flange portion of the shaft portion, and rotating the attachment jig by the tool after the engagement. And unscrewing the male screw portion from the female screw portion.

  Another aspect of the fifth step includes a step of inserting a tip of a screwdriver tool into a notch formed on the inner periphery of the shaft portion on the head side, and the attachment by the screwdriver tool after the insertion. And rotating the jig to screw out the male screw portion from the female screw portion.

  ADVANTAGE OF THE INVENTION According to this invention, the assembly | attachment property to the formwork of the jig | tool which attaches an insert to a formwork is improved, and the workability | operativity improvement of insert embedding work can be aimed at.

The longitudinal section of the jig for attachment used for the embedding method of the insert concerning a 1st embodiment of the present invention. (A) is a side view of the mounting jig, (b) is a cross-sectional view taken along line AA of (a), and (c) is a front view of (a). (A) is an upper perspective view of the dedicated adapter, (b) is a lower perspective view of the dedicated adapter. (A) (b) is a partially broken side view showing the work process of inserting the head of the mounting jig through the mounting hole of the wooden frame, and (c) is for mounting by fixing the fixing pin from the inside of the wooden frame with a hammer. FIG. 4D is a partially cutaway side view showing a work process for fixing the head of the jig to the wooden frame; FIG. 4D is a partially cutaway side view showing the work process of screwing the male screw portion of the mounting jig into the insert; The partially broken side view which shows the state after concrete placement, (f) is the partially broken side view which shows the operation | work process which drives the fixing pin from the outside of a wooden frame with a hammer, and cancels fixation of a wooden frame and a jig for attachment (G) is a partially broken side view showing a work process for removing a wooden frame, (h) is a partially broken side view showing a work process for connecting a dedicated socket attached to a socket wrench to a mounting jig, and (i). After the work process of (h), loosen the fastening between the mounting jig and the insert. Partially cutaway side view showing a working step that, (j) is a partial sectional side view showing a working step of removing the attaching jig from the insert. The longitudinal cross-sectional view of the jig | tool main body of the jig for attachment used for the embedding method of the insert which concerns on 2nd Embodiment of this invention. The BB part perspective enlarged view. (A) (b) is a longitudinal sectional view showing the work process of breaking the head of the mounting jig after the work process of FIG. 4 (g) and loosening the fastening between the mounting jig and the insert with a driver tool; (C) is a partially broken side view showing a work process of removing the mounting jig from the insert after the work processes of (a) and (b). The expanded partial fracture | rupture side view which shows the detail of FIG.7 (b). (A) is a side view of a mounting jig used in the method for embedding an insert according to the third embodiment of the present invention, (b) is a cross-sectional view taken along the line CC of (a), and (c) is a front view of (a). Figure. (A) (b) is a partially broken side view showing the work process of inserting the head of the mounting jig into the mounting hole of the sheet metal frame, and (c) is for mounting by hitting the fixing pin with a hammer from the inside of the sheet metal frame. FIG. 4D is a partially cutaway side view showing the work process of fixing the head of the jig to the sheet metal frame, FIG. 4D is a partially cutaway side view showing the work process of screwing the male screw portion of the mounting jig into the insert, and FIG. The partially broken side view which shows the state after concrete placement, (f) is the partially broken side view which shows the operation | work process which drives the fixing pin from the outside of a sheet metal frame with a hammer and cancels fixation of a sheet metal frame and a mounting jig. (G) is a partially broken side view showing a work process for removing a sheet metal frame, (h) is a partially broken side view showing a work process for connecting a dedicated socket attached to a socket wrench to a mounting jig, and (i). Is the mounting jig and insert after the work process of (h) Partially cutaway side view showing a working step of loosening the fastening of, (j) is a partial sectional side view showing a working step of removing the attaching jig from the insert. The enlarged view of (alpha) part of FIG.10 (c). The longitudinal cross-sectional view of the insert of patent document 1. FIG.

  Hereinafter, a method for embedding an insert according to an embodiment of the present invention will be described. This insert is embedded in a concrete structure such as a bridge pier, for example, and is used to fix a fixed member such as a support bolt for a scaffold to the concrete structure.

<< First Embodiment >>
The embedding method according to the first embodiment will be described with reference to FIGS. In FIG. 1, 11 indicates a mounting jig, 12 indicates a ceramic insert, and 13 indicates a wooden formwork (hereinafter referred to as a wooden frame 13).

(1) Insert, Formwork, Mounting Jig Insert 12 includes an insert body 14 in which a female screw hole 15 is formed, and a tubular sleeve 17 in which a communication hole 16 communicating with the female screw hole 15 is formed along the axial direction. And an annular seal portion (for example, a rubber seal) 19 bonded to the open end portion of the sleeve 17. Further, a mounting hole 18 for mounting the insert 12 is formed through the wooden frame 13.

  The attachment jig 11 detachably attaches the insert 12 to the wooden frame 13 when the insert 12 is embedded in a concrete structure. Specifically, the attachment jig 11 is made of resin or metal, and is formed in a substantially cylindrical jig main body 20 for attaching the insert 12 to the wooden frame 13, and in the axial direction of the jig main body 20. The fixing pin 21 is slidably inserted into the through-hole 24, and one end 21a of the fixing pin 21 is formed in an arc shape.

  As shown in FIGS. 2A to 2B, the jig body 20 includes a head portion 22 that is inserted through the mounting hole 18 and a shaft portion 23 that is integrally formed with the head portion 22. . The shaft part 23 is formed on the outer periphery of the boundary between the male screw part 23a fastened to the female screw hole 15, the body part 23b formed on the head part 22 side of the male screw part 23a, and the head part 22 of the body part 23b. And an annular flange portion 27 inscribed in the wooden frame 13.

  As shown in FIGS. 2A to 2C, the head portion 22 is divided into four slits 25 formed in the circumferential direction at 90 degrees along the axial direction, and the slits 25. And a split section 26 having an arc-shaped cross section that can be elastically deformed.

  Each slit 25 is formed from the tip of the head portion 22 to the boundary with the body portion 23 b, that is, before the flange portion 27. The outer periphery of the divided portion 26 includes a group of engaging teeth 29a and vertical grooves 29b between the engaging teeth 29a, while a convex portion 28 extends along the width direction at the inner peripheral tip of the divided portion 26. The inner diameter of the through hole 24 is reduced by the convex portion 28 on the distal end side of the divided portion 26.

  Accordingly, each divided portion 26 is spread in an open leg shape by the one end portion 21a when the fixing pin 21 is pushed in the direction of the arrow P. On the other hand, if the fixing pin 21 is pushed in the direction of the arrow Q and returned to the original position, each divided portion 26 is restored to the shape before being spread. FIG. 1 shows the shape of the divided portion 26 after being spread, and FIG. 2B shows the shape of the divided portion 26 before being spread.

  The flange portion 27 has a tapered outer peripheral edge (edge), and a plurality of engagement hole portions 30 that can engage with the engagement protrusions 34 of the dedicated socket 31 are formed at equal intervals. As shown in FIGS. 3 (a) and 3 (b), the dedicated socket 31 is formed in a cylindrical shape, and includes an accommodation port 33a on one end side in which the head portion 22 is accommodated, and a socket wrench S (see FIG. 4). The other end side insertion port 33b into which the insertion angle S1 is inserted is provided.

  In the insertion port 33b, an annular recess 33c is formed in which a ball urged by a spring (not shown) can be fitted and removed on the side surface of the insertion angle S1. On the other hand, a plurality of engagement protrusions 34 are formed at positions corresponding to the engagement holes 30 at the opening end of the accommodation port 33a.

(2) Working process of the burying method The working process of the burying method will be described with reference to FIG. 4 (a) and 4 (b) show the work process (A), FIG. 4 (c) shows the work process (B), FIG. 4 (d) shows the work process (C), and FIG. e) shows a work process (D), FIG.4 (f) (g) shows a work process (E), FIG.4 (h)-(j) shows a work process (F), and insert 12 is work. It is embed | buried in the concrete structure through process (A)-(F).

  The work steps (A) to (D) are executed inside the wooden frame 13, while the work steps (E) and (F) are executed outside the wooden frame 13. It is assumed that the mounting hole 18 is formed in the wooden frame 13 in advance. Hereinafter, it demonstrates for every work process (A)-(F).

  (A) The mounting jig 11 is inserted into the mounting hole 18 from the inside of the wooden frame 13. In this operation, as shown in FIG. 4A, the head 22 of the mounting jig 11 is made to face the mounting hole 18.

  Thereafter, the head 22 of the mounting jig 11 is inserted into the mounting hole 18 as shown by an arrow C in FIG. At this time, the flange portion 27 may be inserted until the upper surface of the flange portion 27 is inscribed in the inner surface of the wooden frame 13. In this sense, the flange portion 27 serves as a stopper.

  At this stage, the other end portion 21 b of the fixing pin 21 is exposed from the male screw portion 23 a, while the one end portion 21 a is accommodated in the through hole 24 and is not exposed from the head portion 22.

  (B) With the head portion 22 inserted into the mounting hole 18, the other end portion 21b of the fixing pin 21 is driven with a hammer or the like as shown by an arrow D in FIG. As a result, the fixing pin 21 is pushed in the direction of the arrow P, and its one end portion 21a pushes each divided portion 26 into an open leg shape. At this time, the engaging teeth 29a are in pressure contact with the inner peripheral surface of the mounting hole 18, so that they engage and engage with the inner peripheral surface of the mounting hole 18, whereby the head 22 is fixed to the wooden frame 13.

  After the fixing, as shown in FIG. 4 (d), the other end 21 b of the fixing pin 21 is accommodated in the through hole 24, while the one end 21 a is exposed from the head 22. Therefore, whether or not the head 22 is fixed to the wooden frame 13 can be determined at a glance depending on whether or not the one end 21a of the fixing pin 21 is exposed, that is, whether or not the head 22 is exposed. Easy to understand. Since the upper surface of the flange portion 27 presses the wooden frame 13, the mounting jig 11 is fixed to the wooden frame 13 vertically.

  (C) The insert 12 is attached to the attachment jig 11 fixed to the wooden frame 13. In this mounting operation, first, the shaft portion 23 of the mounting jig 11 is inserted into the communication hole 16 of the sleeve 17 and, as indicated by the arrow E in FIG. Screw into the female screw hole 15.

  At this time, since the head 22 is fixed to the wooden frame 13, the assembling property to the wooden frame 13 of the mounting jig 11 is strong, withstands the rotational torque of the arrow E, and the mounting jig 11 is rotated. Is prevented. This eliminates the need to hold the head 22 outside the wooden frame 13 in the work process (C).

  Therefore, it is not necessary to place a worker outside the wooden frame 13, so that the placement efficiency of the worker is improved, the work process is reduced, and workability is improved. When the male screw portion 23a is screwed into the female screw hole 15, the seal portion 19 comes into elastic contact with the flange portion 27, and the space between the two is sealed.

  (D) Concrete 32 is poured into the inside of the wooden frame 13, and the concrete is placed as shown in FIG. At this time, since the upper surface of the flange portion 27 is in close contact with the inner surface of the wooden frame 13, the penetration of the concrete paste (concrete at the time of liquid) into the through hole 24 is prevented. In this respect, damage to the communication hole 16 and the female screw hole 15 due to the intrusion is prevented.

  (E) After drying the concrete 32, as shown by an arrow F in FIG. 4 (f), the one end 21a of the fixing pin 21 is driven with a hammer or the like from the outside of the wooden frame 13. As a result, the fixing pin 21 is pushed in the direction of the arrow Q and returned to the original position (the same position as in FIG. 4B).

  Accordingly, the shape of each divided portion 26 is restored to the shape before being spread, and the fixing of the head 22 and the wooden frame 13 is released. As a result, the fixation with the wooden frame 13 can be released simply by hitting the one end 21a of the fixing pin 21 with a hammer or the like. In this respect, the operation for releasing the fixation is easy and the burden on the worker can be reduced.

  If the concrete pin enters the through hole 24 and the fixing pin 21 cannot be pushed in, the head 22 and the wooden frame 13 can be fixed by pulling the one end 21a of the fixing pin 21 with a pliers or the like. It can be canceled.

  After the unlocking, the wooden frame 13 is removed from the mounting jig 11 as indicated by an arrow G in FIG. The wooden frame 13 can be easily removed by the taper applied to the outer peripheral edge of the flange portion 27.

  (F) The insertion angle S1 is inserted into the insertion port 33a to attach the dedicated socket 31 to the socket wrench S, and then the dedicated socket 31 and the mounting jig 11 are connected. At that time, as shown by an arrow H in FIG. 4 (h), the head portion 22 is accommodated in the accommodation port 33 b, and the engagement protrusion 34 is fitted into the engagement hole 30.

  As a result, the engagement protrusion 34 engages with the inner periphery of the engagement hole 30, and both 11 and 31 are connected. Since the socket wrench S used here may be a commercially available product, it is only necessary to purchase a minimum dedicated tool, that is, the dedicated socket 31 for the construction, and this can contribute to cost reduction.

  Thereafter, the socket wrench S is rotated in the direction of arrow I in FIG. 4I to loosen the fastening between the male screw portion 23a and the female screw hole 15. As a result, the male screw portion 23 a is screwed out from the female screw hole 15, and the mounting jig 11 is removed from the insert 12 as shown by an arrow J in FIG. 4 (j), and the insert 12 is embedded in the concrete 32.

  An opening 32b is formed in the concrete surface 32a after the attachment jig 11 is removed. The fixed member can be fixed to the concrete 32 by fastening a desired fixed member such as a scaffold bolt to the female screw hole 15 through the opening 32b.

<< Second Embodiment >>
The burying method according to the second embodiment will be described with reference to FIGS. Here, as shown in FIG. 5, the body 23 b of the jig body 20 has four cutout grooves 35 formed on the inner periphery on the head 22 side.

  As shown in FIG. 6, each notch groove 35 has a cross position corresponding to the slit 25, that is, a position at 90 degrees in the circumferential direction, so that each tip T1 (see FIG. 7) of the plus driver T can be inserted. Is formed.

  Here, the notch groove 35 is used to remove the mounting jig 11 from the insert when the socket 31 cannot be connected to the flange 27, for example, when the flange 27 is damaged or when the flange 27 is buried in the concrete 32. Used as a means of emergency removal to remove.

  The emergency removal operation will be described with reference to FIG. Here, it is assumed that the work process (E) is finished and the wooden frame 13 has already been removed. However, the work process (F ′) shown in FIGS. 7A to 7C is performed instead of the work process (F).

  This work process (F ′) is performed after the head 22 protruding from the concrete surface is broken with, for example, a hammer and the notch groove 35 is exposed. Specifically, as indicated by an arrow K in FIG. 7A, each tip T1 of the Phillips screwdriver T is inserted into the notch groove 35, respectively. As a result, as shown in FIG. 8, each tip T <b> 1 of the plus driver T and the notch groove 35 are fitted, and the mounting jig 11 can be rotated with the plus driver T.

  Therefore, the fastening between the male screw portion 23a and the female screw hole 15 can be loosened by rotating the plus driver T in the direction of the arrow L in FIG. At this time, since the male screw portion 23a is screwed out from the female screw hole 15, the mounting jig 11 is removed from the insert 12 as shown by the arrow M in FIG. .

  Thereby, even if the situation which cannot connect the socket 31 to the flange part 27 arises, the jig | tool 11 for attachment can be extracted from the insert 12. FIG. In this respect as well, the workability of the insert burying work can be improved.

«Third embodiment»
A third embodiment of the embedding method will be described with reference to FIGS. The mounting jig 40 used in this embedding method attaches / detaches the insert 12 to / from a metal mold 13a (hereinafter referred to as a sheet metal frame 13a) shown in FIG. 10 when the insert 12 is embedded in a concrete structure. It is attached freely. In addition, the sheet metal frame 13 a is formed with a mounting hole 18 for mounting the insert 12 penetrating in the same manner as the wooden frame 13.

(1) Configuration of Mounting Jig 40 The configuration of the mounting jig 40 will be described with reference to FIG. Here, the fixing pin 21 and the shaft portion 23 are configured in the same manner as the mounting jig 11, while the shape of the head portion 22 is different from that of the mounting jig 11.

  As shown in FIGS. 9A to 9C, the head portion 22 of the mounting jig 40 includes four slits 25 formed along the axial direction at 90 degrees in the circumferential direction, And an elastically deformable dividing portion 41 divided into four by the slit 25.

  The slit 25 is formed from the tip of the head portion 22 to the boundary with the body portion 23 b, that is, before the flange portion 27, as in the mounting jig 11. On the other hand, each divided portion 41 includes a leg portion 42 erected at the opening end portion of the trunk portion 23b, a protrusion portion 43 that is formed at the tip of the leg portion 42 and protrudes to the outer peripheral side, A convex portion 44 formed along the width direction is provided on the inner peripheral side, and the inner diameter of the through hole 24 is reduced in diameter on the distal end side of the divided portion 26 by the convex portion 44.

  Therefore, each divided portion 41 is spread out in an open leg shape at one end portion 21a when the fixing pin 21 is pushed in the direction of arrow P. On the other hand, if the fixing pin 21 is pushed in the direction of the arrow Q and returned to the original position, each divided portion 41 is restored to the shape before being spread.

(2) Embedding Method A method for burying the insert 12 using the mounting jig 40 will be described with reference to FIGS. 10 and 11. Here, the insert 12 is embedded in the concrete structure through the work steps shown in FIGS.

  10 (a) and 10 (b) show the same work process as the work process (A), FIG. 10 (d) shows the same work process as the work process (C), and FIG. Indicates a work process similar to the work process (D), FIGS. 10 (f) and 10 (g) illustrate a work process similar to the work process (E), and FIGS. 10 (h) to 10 (j) illustrate the work process. The same work process as the process (F) is shown (if the wooden frame 13 is replaced with the sheet metal frame 13a, the mounting jig 11 is replaced with the mounting jig 40, and the divided portion 26 is replaced with the divided portion 41, respectively. Good.)

  Therefore, description of the work process of FIGS. 10A, 10B, and 10D to 10J is omitted, and the work process of FIG. 10C will be mainly described. Here, it is assumed that the operation step of FIG. 10B, that is, the operation of inserting the attachment jig 40 into the attachment hole 18 from the inside of the sheet metal frame 13a is completed.

  After this operation is completed, the other end 21b of the fixing pin 21 is driven with a hammer or the like as indicated by an arrow D 'in FIG. As a result, the fixing pin 21 is pushed in the direction of the arrow P, and the divided portions 41 are pushed and expanded.

  Details will be described with reference to FIG. Here, the one end portion 21a of the fixing pin 21 abuts on the convex portion 44, the leg portion 42 is bent, and the protruding portion 43 is expanded in the direction of the arrow X1.

  At this time, the protruding portion 43 presses the sheet metal frame 13a, and the inclined surface 43a comes into pressure contact with the outer surface of the sheet metal frame 13a. Therefore, as indicated by arrows X2 and X3, the sheet metal frame 13a is sandwiched between the inclined surface 43a of the protruding portion 43 and the outer surface 27a of the flange portion 27, and the head portion 22 is fixed to the sheet metal frame 13a.

  Here, not the inner peripheral surface of the mounting hole 18 but the flat surfaces of the inner and outer surfaces of the sheet metal frame 13a and the both surfaces 43a and 27a are grounded, so that the insert body 14 shown by the arrow E in FIG. Sufficient resistance against rotation is obtained. Accordingly, when the male screw portion 23a is screwed into the female screw hole 15, it can withstand the rotational torque indicated by the arrow E, and the mounting jig 40 is prevented from being turned around, so that the same effect as that of the embedding method of the first embodiment can be obtained.

≪Other examples≫
The present invention is not limited to the above-described embodiments, and can be modified and implemented within the scope described in each claim. For example, the engaging teeth 29a and the longitudinal grooves 29b formed on the outer periphery of the divided portion 26 of the mounting jig 11 may be eliminated.

  In this case, although the engaging teeth 29 a do not engage with the inner peripheral surface of the mounting hole 18, the outer peripheral surface of each divided portion 26 presses against the inner peripheral surface of the mounting hole 18. The fixing jig 40 can be prevented from being rotated when the male screw portion 23a is fixed and screwed into the female screw hole 15.

  Further, if the notch groove 35 is provided in the body portion 23 b of the mounting jig 40, the mounting jig 40 can be removed from the insert 12 even when the socket 31 cannot be connected to the flange portion 27. it can.

  Furthermore, the notch groove 35 can fit each tip T1 by pushing the divided portions 26 and 41 with a Phillips screwdriver T without breaking the head 22.

  The heads 22 of the mounting jigs 11 and 40 need only be able to be fixed to the wooden frame 13 and the sheet metal frame 13a when the fixing pin 21 is pushed in. Therefore, the fixing jigs 21 and 40 are not limited to four divisions and the fixing strength is ensured. It can be divided into as many ranges as possible. For example, the head 22 may be composed of two divided parts 26 and 41.

11, 40 ... Insert mounting jig 12 ... Insert 13 ... Wooden frame (form frame)
13a ... Sheet metal frame (form frame)
14 ... Insert body 15 ... Female thread hole (Female thread part)
DESCRIPTION OF SYMBOLS 16 ... Communication hole 17 ... Sleeve 18 ... Mounting hole 19 ... Seal part 20 ... Jig body 21 ... Fixing pin 22 ... Head 23 ... Shaft part 23a ... Male screw part 23b ... Trunk part 24 ... Through-hole 25 ... Slit 26, 41 ... division part 27 ... flange part 29a ... engagement tooth 29b ... vertical groove 30 ... engagement hole part (engaged part)
32. Concrete (concrete structure)
31 ... Dedicated socket (tool)
34 ... engaging protrusion (engaging part)
35 ... Notch groove (notch)
43 ... Projection S ... Socket wrench T ... Phillips screwdriver (screwdriver)

Claims (6)

An insert for fixing a member to be fixed to a concrete structure is embedded in the concrete structure using a mold and a mounting jig,
A first step of inserting the head of the mounting jig through the mounting hole of the mold;
A second step of pressing the fixing pin inserted into the through hole in the axial direction of the mounting jig to fix the head to the formwork;
A third step of fastening the male screw portion formed on the shaft portion of the mounting jig to the female screw portion of the insert;
A fourth step of returning the fixing pin to the original position after placing the concrete in the mold and releasing the fixation between the head and the mold and removing the mold;
A fifth step of screwing out the male screw portion from the female screw portion and removing the mounting jig from the insert;
A method of embedding an insert, comprising: In the second step,
The insert embedding method according to claim 1, wherein an outer periphery of the divided portion divided by the slit of the head is pressed into contact with an inner periphery of the mounting hole when the fixing pin is pushed. In the second step,
The insert embedding method according to claim 2, wherein engagement teeth formed on an outer periphery of each of the divided portions engage with an inner periphery of the attachment hole when the fixing pin is pushed. In the second step,
The mold frame is sandwiched between a divided portion divided by a slit in the head when the fixing pin is pushed in and an annular flange portion formed in the shaft portion. How to embed inserts. The fifth step includes
Engaging the engaging portion of the tool with the engaged portion formed on the flange portion of the shaft portion;
Rotating the mounting jig with the tool after the engagement, and screwing the male screw portion from the female screw portion;
The method for embedding an insert according to any one of claims 1 to 4, characterized by comprising: The fifth step includes
Inserting the tip of a screwdriver tool into a notch formed in the inner periphery of the shaft on the head side; and
Rotating the mounting jig with the screwdriver after the insertion, and screwing the male screw portion from the female screw portion;
The method for embedding an insert according to any one of claims 1 to 4, characterized by comprising:

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