JP4394549B2 - Insert mounting jig unit - Google Patents

Description

  The present invention relates to an insert mounting jig unit used for mounting an insert on a concrete placing side of a steel mold.

  Conventionally, when the insert is attached to the concrete placing side (inside) of the formwork, as shown in FIG. 10, for example, as shown in FIG. The threaded portion 2a of the screw is passed through a bolt insertion hole 1a formed in the mold 1 for each screw size and protrudes to the inside of the mold 1 while the insert 3 is held inside the mold 1 and temporarily fixed. The insert 2 is fastened to the mold 1 by screwing the screw portion 2 a of the bolt 2 into the female screw hole 3 a of the insert 3. Then, after inserting the insert 3 at each insert mounting position of the mold 1, after placing the concrete, when removing the mold, the temporary fixing bolt 2 is twisted and removed from the insert 3 outside the mold 1. ing.

  However, in the conventional insert mounting structure using the temporary fixing bolt 2, (1) it is necessary to drill bolt insertion holes 1a having different hole diameters for each screw size in the mold 1 in accordance with the insert 3 to be mounted. There was a problem that it took time and labor for drilling work, and it was very troublesome. (2) In order to attach the insert 3 to the mold 1, an operation of projecting the screw portion 2 a of the temporary fixing bolt 2 from the outside of the mold 1 to the inside of the mold 1 through the bolt insertion hole 1 a is performed. On the other hand, on the inside of the mold 1, it is necessary to hold the insert 3 and turn the screw part 2 a of the temporary fixing bolt 2 into the insert 3, and as a result, work on both sides of the mold 1. There is a problem that it is necessary to work with personnel, and that the work is inefficient due to the extra personnel required. Further, (3) when removing the mold, it is necessary to twist the temporarily tightened bolt 2 that is tightly screwed outside the mold 1 and remove it from the insert 3, which requires time and effort to remove the mold. There was also a problem. On the other hand, (4) the mold 1 is usually diverted to another concrete casting, but each time the diversion is made, if a relatively large bolt insertion hole 1a is opened at a large number of locations, the corresponding amount of the mold 1 Since the strength is reduced, there is a problem that the frequency of diversion of the formwork is reduced as a result and the durability is insufficient. Moreover, (5) when the formwork is diverted, every time the mounting position of the insert is changed, it is necessary to repeat the filling process for filling the unused large bolt insertion hole, which is troublesome. There was a problem of being troublesome.

  Therefore, the object of the present invention is to solve the above-mentioned conventional problems, drilling holes for different bolt insertion holes in the mold, removing bolts at the time of demolding, filling work for filling large bolt insertion holes Offers an insert mounting jig unit that eliminates many troublesome tasks such as eliminating the need for workers on both sides of the formwork and easily and efficiently inserts the insert into the formwork without reducing the durability of the formwork. There is to do.

  In order to achieve the above-described object, the invention described in claim 1 includes an insert mounting jig A for mounting the insert I on the concrete placing side of the steel mold F, for example, as shown in the embodiment shown below. , An insert mounting jig unit J provided with a dedicated handle B for removing the insert mounting jig A from the concrete C at the time of demolding, wherein the insert mounting jig A is placed at each insert mounting position of the formwork F. An attachment fitting 10 to be fixed and an elongated anti-rest pin 20 of the attachment fitting 10 are provided. The attachment fitting 10 is provided with a magnet fitting recess 11d at the center of one side end surface 11b and around the magnet fitting recess 11d. A metal fitting body 11 provided with a plurality of demolding pin holes 11e, and a female screw hole b of the insert I protruding from the other end face 11c of the fitting body 11. A male shaft to be screwed is formed with a threaded shaft 12, and a vibration retaining hole 13 through which the vibration retaining pin 20 is inserted is penetrated in the same central axis direction of the screw shaft 12 and the metal fitting body 11. The vibration retaining hole 20 and the ring center hole 15a are made to communicate with each other in the magnet fitting recess 11d, and the magnet ring 15 is fitted and held by suction. When the insert is attached, the screw shaft 12 is fitted to the female screw hole b. The anti-rotation pin 20 is inserted into the anti-vibration hole 13 and the pin tip 20b side of the anti-vibration pin 20 is inserted into the insert mounting position of the mold F. The metal fitting body 11 is magnetically fixed to the formwork F by being engaged through a pin insertion hole a that is formed in accordance with the shaft diameter. hand The pin mounting base 30 is fixed to the tip of the handle portion 25, and these pin mounting bases 30 are made to correspond to the mold removal pin holes 11e of the insert mounting jig A and are used for the mold removal. A plurality of jig rotation pins 35 that can be engaged with the pin holes 11e are provided upright.

  The invention according to claim 2 is the insert mounting jig unit J according to claim 1, for example, as shown in the following embodiment, the mounting bracket 10 of the insert mounting jig A is the bracket body. 11 is formed with an annular groove 11f between the other end surface 11c and the screw shaft 12, and a sealing material such as a resin O-ring 16 is fitted into the annular groove 11f and connected to the insert I. It is characterized by sealing between the insert I.

  The invention according to claim 3 is the insert mounting jig unit J according to claim 1 or 2, wherein the mounting bracket 10 of the insert mounting jig A is, for example, as shown in the embodiment shown below. The metal fitting body 11 is formed in a substantially disk shape, and the outer peripheral surface 11a of the metal fitting body 11 is formed with a tapered surface that gradually decreases in diameter from the one end face 11b toward the other end face 11c. Features.

  According to a fourth aspect of the present invention, in the insert mounting jig unit J according to the first, second, or third aspect, for example, as shown in the embodiment shown below, the removal-only handle B is used for rotating the jig. The pin 35 is formed by a screw pin in which a male screw is screwed to a pin base end portion 35b opposite to the pin tip end portion 35a to be engaged with the demolding pin hole 11e of the insert mounting jig A. A plurality of pin insertion holes 31 through which the jig rotation pins 35 are inserted are provided in the base 30, and the jig rotation pins 35 are passed through the pin insertion holes 31 to attach the pin tip portions 35 a to the pins. The jig rotating pin 35 is detachably attached to the pin mounting base 30 by projecting from the base 30 and screwing a nut 40 into the pin base end portion 35b.

  According to the first aspect of the present invention, instead of screwing the bolt as in the prior art, the screw shaft is screwed into the female screw hole in advance to connect the mounting bracket to the insert, while the mounting bracket is connected to the magnetic force of the magnet ring. In this structure, the insert is attached to the insert by adsorbing it to the insert attachment position. (1) When installing the insert, there is no need to work with workers on both sides of the formwork. One worker can easily perform the installation work on one side, and the work efficiency can be improved by reducing the number of workers. (2) There is no need to drill bolt insertion holes with different hole diameters at each insert mounting position of the mold as in the past, and the mold is a small common pin that matches the thin shaft diameter of the anti-rest pin. It is only necessary to make an insertion hole, and the drilling work to be applied to the mold can be remarkably simplified without much trouble. (3) As a result of diverting the formwork, even if a large number of pin insertion holes are made in the formwork, a large number of large bolt insertion holes are made as in the conventional case, so that the pin insertion holes are extremely small in diameter. As a result, the durability can be improved by increasing the frequency with which the same formwork is repeatedly transferred. (4) Moreover, since the pin insertion hole in the formwork has a very small diameter, even if the mounting position of the insert may be changed later, the hole filling repair work to close the unused large bolt insertion hole is performed as before. The unused pin insertion hole can be closed by inserting a small resin plug, for example, and the hole filling and repairing operation can be made extremely simple without much trouble. (5) At the time of mold removal, there is no need to perform the troublesome work of removing the temporary fixing bolt that has been tightly screwed and removing it from the insert as in the prior art. The mounting bracket can be easily removed from the insert without any hassle by simply engaging the mounting bracket with the demolding pin hole and rotating the dedicated handle for removal. . (6) Furthermore, insert the anti-rest pin into the anti-rotation hole of the insert mounting bracket, and when inserting the insert, engage the anti-rotation pin with the pin insertion hole of the mold, Because it is a simple structure that can be attached to the mold, there is no need for a separate, large and complex brace when installing this insert. It can be guided easily and accurately to the mounting position, and the result is that the insert is secured to the formwork by a steady pin so that the insert does not move or tilt when the concrete is placed. It can be securely fixed at a predetermined insert mounting position.

  In addition, according to the invention described in claim 2, in the insert mounting jig, since the sealing material is fitted and sealed in the annular groove of the mounting bracket, the mounting bracket coupled to the insert fitting It is possible to reliably prevent foreign matters such as paste mortar from entering between.

  According to the third aspect of the present invention, when the mounting bracket is removed from the insert using the dedicated removal handle, the mounting bracket is a taper whose diameter increases in the removal direction in which the outer peripheral surface of the bracket body is easy to be removed. Since it is formed by the surface, it can be easily removed from the concrete at the metal fitting body, and in this respect, the entire mold removal operation can be facilitated.

  According to the invention described in claim 4, when the jig rotation pin is damaged during repeated use, for example, when the jig rotation pin is damaged, the nut screwed into the jig rotation pin is used. Can be easily replaced with a new jig rotation pin by unscrewing and removing the jig rotation pin from the pin insertion hole of the pin mounting base.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a state in which an insert is attached to a mold using an insert attachment jig unit which is an example of the present invention. In the figure, reference symbol J denotes an insert mounting jig unit according to the present invention, reference symbol F denotes a steel mold for concrete molding, and reference symbol I denotes an insert attached to the mold F. A small-diameter pin insertion hole a is formed in the mold frame F at a plurality of insert mounting positions in accordance with the shaft diameter of the anti-vibration pin 20 described later. In the illustrated insert I, a stainless steel pipe is internally threaded, and a female screw hole b having a hole diameter of, for example, 12 mm (M12) is provided.

  The insert mounting jig unit J includes an insert mounting jig A for temporarily fixing the insert I to the mold F, and a dedicated handle B for removing the insert mounting jig A from the concrete (see FIGS. 4 and 5). The insert mounting jig A includes a mounting bracket 10 that is fixed to each insert mounting position of the formwork F, and a swing pin 20 of the mounting bracket 10. As shown in FIG. 2, the anti-rest pin 20 in the illustrated example is made of a long and thin iron rod, and is formed to have a length corresponding to various general insert lengths, and the pin base end 20 a is sharpened in a needle shape.

  In the insert mounting jig A, the mounting bracket 10 is formed by a bracket body 11 and a screw shaft 12 fixed thereto, as shown in FIGS. The metal fitting body 11 is made of a magnetic material, for example, iron, and is formed into a substantially disc shape with a through hole 13a having a small diameter in accordance with the shaft diameter of the anti-rest pin 20, and the outer peripheral surface 11a is formed from the one side end surface 11b. The taper is formed into a tapered surface that gradually decreases in diameter toward the other end surface 11c. The one end face 11b is formed with a magnet fitting recess 11d at the center thereof and a plurality of demolding pin holes 11e around the magnet fitting recess 11d. On the other hand, an annular groove 11f for sealing is concentrically provided on the outer periphery surrounding the central through hole 13a on the other end face 11c. The screw shaft 12 has a male shaft screwed into the female screw hole b of the insert I on the outer periphery, and a short shaft shape in which a through hole 13b having a small diameter corresponding to the shaft diameter of the anti-rest pin 20 is formed in the central axis direction. It is molded into One end 12a of the screw shaft 12 is fixed to the other end surface 11c of the metal fitting body 11 by spot welding or the like so that the centers of the through holes 13a and 13b are aligned on the same axis line. is doing. The mounting bracket 10 is formed with one bracing hole 13 through communication between the bracket body 11 and the through holes 13a and 13b of the screw shaft 12.

  The mounting bracket 10 is attached to the magnet fitting recess 11d on one side end face 11b with the retaining ring 13 and the ring center hole 15a being in communication with each other, and the magnet ring 15 is fitted and held in the magnet fitting recess 11d. It becomes. The magnet ring 15 has a ring center hole 15 a formed with a small diameter hole corresponding to the shaft diameter of the anti-rest pin 20. On the other hand, on the other end face 11c, a resin O-ring 16 as a sealing material is fitted into the annular groove 11f, and is attached in a tight contact around the base end 12a of the screw shaft 12.

  In the illustrated example, the mounting bracket 10 is formed by fixing the screw shaft 12 having a shaft diameter matched to the thread size (M12) of the female screw hole b of the insert I to the bracket main body 11. The metal fitting 10 has a structure in which screw shafts of various screw sizes (M10, M16, M20,...) Are fixed to the same metal fitting body 11 according to the screw size of the insert to be attached as required.

  On the other hand, as shown in FIGS. 4 and 5, the removal dedicated handle B provided in the insert mounting jig unit J has a handle portion 25 for rotating operation, and a pin mounting base 30 is provided at the tip of the handle portion 25. For example, it is fixed by spot welding. The handle portion 25 in the illustrated example is made of metal, and includes a round rod-like rod 26 and a grip 27 that is fitted and fixed to the proximal end side of the rod 26. In the illustrated example, the pin mounting base 30 has a thick and substantially triangular plate shape, and pin insertion holes 31 are provided near the respective vertex positions corresponding to the demounting pin holes 11e of the insert mounting jig A. A jig rotation pin 35 is provided upright in the insertion hole 31 through a pin tip 35a.

  The jig rotation pin 35 is formed by using a screw pin in which a pin front end portion 35a is formed with a small diameter that can be engaged with the demolding pin hole 11e, and a male screw is screwed to the pin base end portion 35b. ing. Then, the pin tip 35 a is passed through the pin insertion hole 31 to protrude from the one side operation surface 30 a of the pin mount 30, while the nut 40 is screwed to the pin base 35 b to the pin mount 30. Removably attached.

  When the insert mounting jig unit J having the above configuration is used and the insert I is mounted on the formwork F, the screw shaft 12 of the insert mounting jig A is screwed into the female screw hole b in advance. Then, the anti-rotation pin 20 is inserted into the anti-rotation hole 13 of the mounting bracket 10, and the pin tip 20b protrudes from the pin center hole 15a of the magnet ring 15 as shown in FIG. Assemble jig A. Then, on the inner side of the mold F, as shown by an arrow in FIG. 6, the pin tip 20 b side of the rocking pin 20 is inserted into the pin insertion hole a of the mold F, and the insert mounting jig A is molded with the rocking pin 20. As shown in FIG. 1, the one end face 11 b of the metal fitting body 11 is attracted to the insert fitting position of the mold F by the magnetic force of the magnet ring 15 to fix the fitting 10. . Then, the insert I is attached to the mold F in a steady state by the steady pin 20 engaged with the pin insertion hole a of the mold F.

  After the insert 10 is thus attached to the mold F, as shown in FIG. 7, the concrete I is driven into the mold F and the insert I is fixed. At this time, since the insert I is attached to the mold F in a steady state by the steady pin 20, the insert I is securely fixed at a predetermined insert mounting position in the concrete C without being shifted or inclined. The Further, since the insert mounting jig A seals between the insert I by inserting the resin O-ring 16 in the annular groove 11f of the mounting bracket 10, the insert mounting jig A can be inserted into the insert I from between the mounting bracket 10 and the inside. Prevent foreign material such as paste mortar from entering.

  After the concrete C is hardened, at the time of demolding, as shown in FIG. 7, outside the mold F, the anti-pin 20 is removed from the mounting bracket 10 and then the mold F is removed. Thereafter, as shown in FIG. 8, the mounting bracket 10 is removed from the insert I by using the exclusive handle B for removal. In that case, the grip 27 of the handle portion 25 is grasped, the pin tip portion 35a of the jig rotation pin 35 is engaged with the demolding pin hole 11e of the mounting bracket 10, and the dedicated removal handle B is attached to the mounting bracket 10. Link. Then, the exclusive handle B for removal is rotated in the direction of loosening the screw, and the mounting bracket 10 is twisted to remove it from the female screw hole b of the insert I. At that time, since the outer peripheral surface 11a of the metal fitting body 11 is formed with a tapered surface whose diameter is enlarged in the removal direction, the fitting metal fitting 10 can be easily removed from the concrete C at the metal fitting body 11 portion. .

  In the insert mounting jig unit J, the dedicated removal handle B is, for example, a nut screwed to the jig rotating pin 35 if the jig rotating pin 35 is damaged during repeated use. 40 is loosened, and the jig rotation pin 35 is removed from the pin insertion hole 31 of the pin mount 30 and replaced with a new jig rotation pin.

  By the way, in the illustrated embodiment described above, the example in which the insert mounting jig unit J is applied to the mounting of the stainless steel insert I is shown. However, the present invention is not limited thereto, and is made of, for example, ceramic or deformed reinforcing bar. It can also be applied to the mounting of various other inserts such as

  Further, in the illustrated embodiment described above, the example in which the insert mounting jig unit J is applied to the insert I in which the entire inner circumference of the pipe is threaded is shown. However, the present invention is not limited thereto, and the pipe The present invention can also be applied to inserts whose inner surface is partially threaded. In the case where the insert to be attached is of a type in which the inner surface of the pipe is threaded, for example, the mounting bracket 10 corresponds to the threading position, for example, as shown in FIG. In addition to being formed in a long shape, a male screw can be screwed on the other end 12b side.

It is a side view which shows the state which attached the insert to the formwork using the insert attachment jig unit which is an example of the present invention, and shows a section. It is a perspective view which shows the attachment metal fitting and anti-rotation pin of an insert attachment jig. (A) is a bottom view of the mounting bracket, (B) is a side view showing a part of the mounting bracket in cross section, and (C) is a plan view of the mounting bracket. It is a perspective view which shows a removal exclusive handle. (A) is a bottom view of the exclusive handle for removal, and (B) is a side view thereof. It is a side view which shows in a partial cross section the state which attaches an insert to a formwork with the guidance of the anti-rest pin of an insert attachment jig. It is a side view which shows the state after attaching an insert to a formwork using an insert attachment jig and putting concrete into a partial cross section. It is a side view which shows in a partial cross section the state which removes the attachment metal fitting of an insert attachment jig from an insert using a removal exclusive handle. It is a side view which shows the other example of the attachment metal fitting with which the insert attachment jig was equipped. It is a longitudinal cross-sectional view which shows the prior art example which attached the insert to the formwork.

Explanation of symbols

A Insert mounting jig B Detachable handle C Concrete F Formwork I Insert J Insert mounting jig unit a Insert pin hole b Insert female screw hole 10 Mounting bracket 11 Hardware body 11d Magnet fitting recess 11e Demolding pin Hole 11f Annular groove 12 Screw shaft 13 Anti-rotation hole 15 Magnet ring 15a Ring center hole 16 of the magnet ring 16 O-ring (seal material)
20 Locking Pin 25 Rotating Operation Handle 30 Pin Mount 35 Jig Rotating Pin 40 Nut

Claims (4)

An insert mounting jig unit comprising an insert mounting jig for attaching an insert to a concrete placing side of a steel mold, and a dedicated handle for removing the insert mounting jig from the concrete at the time of demolding,
The insert mounting jig is
A mounting bracket fixed to each insert mounting position of the mold and an elongated anti-rest pin of the mounting bracket. The mounting bracket includes a magnet-fitted recess at the center of one side end surface and the magnet-fitted recess. Formed with a magnetic metal fitting body provided with a plurality of demolding pin holes around and a screw shaft provided with a male screw protruding from the other end surface of the fitting main body and screwed into the female screw hole of the insert. In addition, a vibration-preventing hole through which the vibration-preventing pin is inserted is formed so as to penetrate in the same central axis direction of the screw shaft and the metal fitting body, and the vibration-preventing hole and the ring center hole are formed in the magnet fitting recess. When the insert is attached, the screw shaft is screwed into the female screw hole and connected to the insert, while the anti-pin pin is inserted into the anti-static hole. The pin tip side Is engaged through the pin insertion hole to fit apart in the axial diameter of the vibration stopping pin on the insert mounting position of the mold, while the configuration for magnetically securing said fitting body to said mold,
The dedicated handle for removal has a handle portion for rotating operation, a pin mounting base is fixed to the tip of the handle portion, and the pin mounting base is made to correspond to the demolding pin hole of the insert mounting jig. An insert mounting jig unit comprising a plurality of jig rotation pins that can be engaged with the demolding pin holes.   The mounting bracket of the insert mounting jig forms an annular groove with the screw shaft on the other side end surface of the bracket body, and a sealing material is fitted into the annular groove and connected to the insert. The insert mounting jig unit according to claim 1, wherein a gap between the inserts is sealed.   The mounting bracket of the insert mounting jig is a tapered surface in which the bracket body is formed in a substantially disk shape, and the outer peripheral surface of the bracket body is gradually reduced in diameter from the one end face toward the other end face. The insert mounting jig unit according to claim 1, wherein the insert mounting jig unit is formed by. The detachable handle is formed by a screw pin in which a male screw is screwed on a pin base end portion opposite to a pin tip portion for engaging the jig rotating pin with a demolding pin hole of the insert mounting jig. On the other hand, the pin mounting base is provided with a plurality of pin insertion holes through which the jig rotation pins are inserted, and the jig rotation pins are passed through the pin insertion holes so that the pin tip portions are attached to the pins. In addition to projecting from a base, the jig rotation pin is detachably attached to the pin mounting base by screwing a nut into the pin base end. The described insert mounting jig unit.

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