JPH06167044A - Insert member mounting tool in form for concrete formation - Google Patents

Abstract

PURPOSE:To surely mount an insert member at the time of formation as well as to easily remove a mounting tool from the insert member irrespective of the mounting position of the insert member mounting tool and the form opening method. CONSTITUTION:A core pin 15 where an insert member if fitted and supported is arranged. The pin 15 is supported while the insertion into an insertion hole 9 formed at an outside form 1a. This mounting tool is composed of a guide cylinder 8 moving the pin 15 between the projecting mounting position to the concrete forming face side and the removing position retreated to the nonformation face side, support shaft 10 and a handle. With such constitution, at the time of forming concrete mold, the insert member 3 is set after the core pin 15 is moved to the mounting position projecting to the concrete forming face side of the outside frame 1a. After the formation, the insert member 3 is removed after the core pin 15 is moved to the mounting position where it retreats on the side of non-formation concrete face sides.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixture for an insert material when forming a concrete molded product such as a U-shaped groove.

[0002]

2. Description of the Related Art Conventionally, in order to facilitate the movement of a concrete molded article such as a U-shaped groove, a suspending tool for suspension is attached at a predetermined position, and a wire is hung on this suspending tool and suspended by a crane. I am trying to do it. As this type of locking tool, there is known one in which a bottomed cylindrical insert material having a female screw portion is embedded in a concrete molded product in advance, and the locking tool is screwed and fixed to this insert material. There is.

In order to bury and fix such an insert material in concrete, for example, a mounting tool as shown in FIG. 9 has been proposed. This fixture is provided with a core pin 31 for attaching a cylindrical insert material 30 having a bottom. The core pin 31 is provided with a fitting insertion portion 31a having a diameter slightly larger than the inner diameter of the insert material 30 and the like, and is an outer formwork rotatably assembled to the concrete forming formwork via a mounting bolt 32 and a nut 33. It is attached to 34.

Then, with the outer molds 34 left open, the insert materials 30 are previously hammered into the core pins 31 to be fitted therein, and then the mold 34 is rotated to a vertical position for concrete. C is injected. continue,
After the concrete molded product is molded by solidifying the concrete C, the mold 34 is rotated to both sides to open the mold,
At the same time, the core pin 31 is removed from the insert material 30, and the insert material 30 is embedded and fixed in concrete. After that, the concrete molded product is taken out of the mold.

Therefore, in the above-mentioned conventional example, the core pin 3 is used.
Since the fixture consisting of 1 and the mounting bolts 32 is fixed to the mold 34 by tightening, the fixture is opened at the same time when the mold is opened after molding.
Can be removed from. Therefore, the number of working steps can be reduced, and the work of attaching the insert material 30 can be facilitated.

[0006]

However, in the above fixture, when the fixture is assembled in the vicinity of the rotating shaft 34a of the mold 34, if the outer mold 34 is opened after molding, There is a problem that it becomes difficult to remove the core pin 31 of the fixture from the insert material 30. That is, when the fixture is close to the rotation shaft 34a, the fitting insertion portion 31a and the taper portion 31b of the core pin 31 are caught on the inner peripheral surface of the insert material 30 during mold opening, and it is difficult to remove the core pin 31 from the insert material 30. Becomes

In addition to the method of rotating the outer mold 34 around the rotating shaft 34a to open the mold as described above, although not shown, the mold 34 is slid parallel to the side surface of the concrete molded product. There is also a way to open the mold. However, when the mold frame 34 is slid, it is difficult to remove the core pin 31 from the insert material 30 at the same time when the mold is opened because the sliding amount is small (about 5 mm to 10 mm).

In order to solve the above problems, the core pin 3
It is also conceivable to shorten the length of the fitting insertion portion 31a or the like to reduce the catch with the insert material 30 during extraction. However, since the portion of the insert material 30 that is fitted into and supported by the core pin 31 is reduced, the concrete C is injected into the insert material 3 when the concrete C is poured.
When it reaches 0, there arises a problem that the insert material 30 is easily removed from the core pin 31.

Further, the state where the insert material 30 is not completely fitted into the fitting insertion portion 31a, that is, the insert material 3
If there is a gap between the end surface of 0 and the inner surface of the mold 34,
There is a problem that concrete cannot be prevented from entering the inside of the insert material 30 during concrete molding. In particular, in the insert material 30 in which the female screw portion is threaded on the entire inner circumference, the top portion of the male screw portion and the outer peripheral surface of the fitting insertion portion 31a are in sliding contact with each other at the time of fitting and inserting. For this reason, the sliding contact portion is reduced as compared with the case where the surfaces are slidingly contacted with each other, and when the concrete is poured, the concrete permeates the sliding contact portion and exudes the concrete into the insert material 30.

The present invention has been made in view of the above problems. A first object of the present invention is to remove the fixture from the insert material regardless of the mounting position of the fixture of the insert material and the method of opening the mold. An object of the present invention is to provide a fixture for an insert material in a concrete molding formwork that can be easily removed and can surely mount the insert material during molding.

A second object of the present invention is to provide an insert material fixture for a concrete molding formwork which can prevent concrete from entering the inside of the insert material during concrete molding.

[0012]

In order to solve the above problems, according to the invention of claim 1, an attaching portion to which an insert material is attached and a concrete forming frame are provided, and an insert formed in the frame is inserted. The mounting portion is inserted into the hole to support the mounting portion, and the mounting portion is configured to move between the mounting position protruding toward the concrete molding surface side and the removal position retracted toward the non-molding surface side. .

According to a second aspect of the present invention, there is provided a mounting tool having a mounting portion to which the insert material is mounted, wherein the mounting portion engages at least between adjacent apex portions of the female screw portion formed inside the insert material. A mating engaging portion is provided.

[0014]

According to the invention of claim 1 having such a structure, when the concrete molded product is molded, the mounting portion of the mounting tool supported by the supporting portion is inserted through the through hole of the mold to form the concrete molding surface. Move to the mounting position that protrudes to the side. Then, the concrete-formed product is formed with the insert material attached to the attachment portion. After the formation, the mounting portion is inserted into the insertion hole of the form, moved to the removal position retracted to the concrete non-molding surface side, and removed from the insert material.
Then, the insert material is embedded in the concrete molded product.

Therefore, the mounting portion can be easily removed from the insert regardless of the mounting position of the mounting tool to the mold and the method of opening the mold. Moreover, since the inner peripheral surface of the insert material is not caught when the mounting portion is pulled out, it is not necessary to shorten the length of the mounting portion. Therefore, the insert material is securely attached to the attachment portion during molding.

According to the second aspect of the present invention, when the insert material is attached to the attachment portion, the engagement portion of the attachment portion is engaged with at least the apex portions of the female thread portions of the insert material adjacent to each other. Therefore, when the concrete is molded, the concrete is dammed by the engaging portion, and therefore the concrete does not enter the inside of the insert material.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIGS.
It will be described with reference to FIG. As shown in FIG. 2, the formwork 1 includes an inner formwork 1b forming an inner surface of a concrete molded product, and a pair of outer sides rotatably connected to both ends of the inner formwork 1b via a rotating shaft 2. It is composed of a mold 1a. Then, the concrete C having a channel shape is formed by injecting concrete C into the molding space S formed by the molds 1a and 1b. This molded product is used as a U-shaped groove.

As shown in FIGS. 2 and 3, the insert material 3 embedded in the concrete molded product is formed into a cylindrical shape with a bottom, and a female screw portion 5 is screwed into a mounting hole 4 inside thereof. There is. A bolt for connecting the U-shaped grooves is screwed into and fixed to the female screw portion 5. In addition, a plate-like movement preventing fin 6 protruding toward the tip side is formed on the outer periphery of the insert material 3 to prevent the insert material 3 from rotating and shifting in the concrete C.

As shown in FIG. 1, the fixture 7 for embedding the insert material 3 in the concrete C is supported on the outer lower portions of both outer mold forms 1a. The attachment 7 is composed of a guide tube 8, a support shaft 10, a handle 11 and the like. The guide cylinder 8 is formed in a hollow cylindrical shape, and an internal thread portion 8a is threaded on the inner peripheral surface thereof. Support shaft 10
Is composed of a male screw portion 10a formed in a rod shape and a support portion 10b. Further, the support shaft 10 is the guide tube 8
The male screw part 10a and the female screw part 8a are inserted in the state of being screwed together. Then, the end surface of the guide cylinder 8 is welded and fixed so as to cover the insertion hole 9 formed in the outer mold 1a. A lid 12 having an opening 12a is attached to a non-welded end surface of the guide cylinder 8 via a bolt 14. The opening 12a has a diameter capable of sliding contact with the support 10b and supports the rotation of the support 10b. or,
With the support portion 10b protruding from the lid 12, a rod-shaped handle 11 is screwed and fixed to the end portion of the support portion 10b so as to be orthogonal to each other.

A core pin 15 as a metallic mounting portion is supported at the end of the support shaft 10 on the male screw portion 10a side. As shown in FIG. 3, the core pin 15 has a base 1
5a, a fitting portion 15b, and a taper portion 15c are formed. The base 15a is formed with a diameter larger than the inner diameter of the insert material 3 and constitutes the base end portion of the core pin 15. Insertion part 1
5b is formed slightly larger (about 0.2 mm in this embodiment) than the inner diameter of the insert material 3 so that the insert material 3 is fitted and supported. In addition, while preventing concrete C from entering the outer peripheral surface of the base end of the fitting portion 15b,
A raised portion 15d is formed as an engaging portion that ensures the fitted and supported state of the insert material 3. This raised portion 15d
Has such a height that the threads of the male screw part 5 are not crushed when the insert material 3 is inserted, and is narrower than the interval (pitch) between the adjacent threads and is located between the threads. It has a width that allows it to contact the top of the mountain. The taper portion 15c is formed on the tip side of the insertion portion 15b so as to be tapered.

As shown in FIG. 1, a mounting bolt 16 is provided at a substantially central position from the end portion of the support shaft 10 on the support portion 10b side.
10c, and a through hole 10d through which the mounting bolt 16 is inserted is formed at the end portion on the male screw portion 10a side. Then, the mounting bolt 16 is attached to the through hole 1
The core pin 15 is supported by the support shaft 10 by inserting 0d and a through hole 15e penetrating the core pin 15 and tightening and fixing with nuts 17a and 17b. Further, the core pin 15 is inserted through the insertion hole 9 by rotating the support shaft 10 via the handle 11, and the outer mold 1
It is movable between a mounting position that projects on the inner surface of a and a removal position that retracts on the outer surface. The insertion hole 9 has a diameter that allows the base 15a of the core pin 15 to be inserted therethrough.

Further, in a state in which the fitting insertion portion 15b and the taper portion 15c of the core pin 15 are completely projected from the inner side surface of the outer mold 1a, the insert material 3 is struck by a hammer on the fitting insertion portion 15a of the core pin 15. It is inserted and fixed. At this time,
As shown in FIG. 3, the end surface 3a of the insert material 3 is brought into close contact with the outer formwork 1a, and the raised portion 15d has the female screw portion 5a.
The abutting portion of the screw thread is used to prevent the concrete C from entering the female screw portion 5 of the insert material 3 when the concrete is poured. The insert material 3 is made of nylon resin and has sufficient strength.

Further, as shown in FIG. 1, a pair of spring washers 18 are provided between the male screw portion 10a and the base 15a, and a spring washer 19 is provided between the tapered portion 15c and the nut 17a. Is installed. Then, when the insert material 3 is attached to the core pin 15, the air inside the insert material 3 is moved to the nut 17a and the tapered portion 15.
It is discharged between the tip surface of b and the through hole 15e to facilitate the insertion and insertion of the insert material 3 into the core pin 15.

Next, the operation of the fixture 7 for the insert material 3 thus constructed will be described. As shown in FIG. 4, while the support shaft 10 is rotated via the handle 11 to move the core pin 15 to the mounting position projecting from the inner side surface of the outer mold 1a, the outer mold 1a is rotated by each rotary shaft. Rotate outward around 2 And core pin 1
5, the insert material 3 is hammered in, and the insert material 3 is fitted and fixed in the fitting insertion portion 15b. At this time,
As shown in FIG. 3, the end surface 3a of the insert material 3 is brought into close contact with the outer formwork 1a, and the raised portion 15d has the female screw portion 5a.
Abutting on the top of the thread, or in the state of being moved to the top of the thread. When there is a gap between the end surface 3a of the insert material 3 and the inner surface of the outer mold 1a, the core pin 15 is moved toward the outside of the outer mold 1a via the handle 11. Then, the insert material 3 moves together with the core pin 15, and the end surface 3a and the inner side surface of the outer mold 1a come into close contact with each other, so that there is no space.

Next, as shown in FIG. 5, the outer mold 1a is rotated inward to a vertical position. Then, in this state, the concrete C is poured into the molding space S from above. Figure 6
After the concrete C is solidified, the support shaft 10 is rotated through the handle 11 to position the core pin 15 at the removal position retracted to the outer surface of the outer formwork 1a and then removed from the insert material 3 as shown in FIG. . At this time, since the insert material 3 is held in the concrete C,
The core pin 15 can be removed smoothly without any hindrance when it moves.

Subsequently, as shown in FIG. 7, the outer form 1a
After opening the mold by rotating the mold to both sides, the concrete molded product P is lifted to form the molded product P.
It is released from 1b.

As described above, in this embodiment, the core pin 15 constituting the fixture 7 of the insert material 3 is projected from the inner side surface of the outer mold 1a during molding, and the outer mold 1 is molded after molding.
Since it is moved to the outside of a, the outer mold 1
It is possible to easily remove the core pin 15 without being caught on the inner surface of the insert material 3 regardless of which position of a the mounting tool 7 is attached to.

Further, it becomes unnecessary to shorten the length of the fitting insertion portion 15b of the core pin 15, and the core pin 1 of the insert material 3 is eliminated.
The number of parts that are inserted into and supported by 5 increases. Therefore, the insert material 3 cannot be easily removed from the core pin 15 when the concrete C is poured into the molds 1a and 1b during molding.

When the insert material 3 is fitted into the core pin 15, the raised portions 15d come into contact with each other between the threads of the female screw portion 5 or at the top of the threads, so that concrete is dammed at the abutting portion. It will be stopped. Therefore, it is possible to prevent concrete from entering the inside of the insert material 3 during concrete molding.

Further, the end surface 3a of the insert material 3 and the outer mold 1a with the insert material 3 fitted in the core pin 15 are inserted.
If a gap is generated between the inner surface and the inner surface, the gap can be eliminated by moving the core pin 15 via the handle 11, so that concrete intrusion can be reliably prevented.

Since the spring washers 18 and 19 are provided, the air inside the insert material 3 is discharged when the insert material 3 is attached to the core pin 15, so that the insert material 3 can be easily driven into the core pin 15. it can.

The present invention is not limited to the above-mentioned embodiments, but may be modified as follows without departing from the spirit of the present invention. (1) In the above embodiment, the fitting portion 15b of the core pin 15 is provided with the raised portion 15d. However, as shown in FIG. 8, at least one screw thread is provided so as to be screwed with the female screw of the insert material 3. You may Further, the insert material 3 may be attached without providing the raised portion 15d. (2) In the above embodiment, the outer mold 1a is provided so as to be rotatable about the rotation shaft 2, but the outer mold 1a is configured to slide parallel to the side surface of the concrete molded product C. Good. In this case, the core pin 15 can be easily removed from the insert material 3 even when the outer mold 1a is slid by a small amount when the mold is opened. (3) The outer diameter or the length of the fitting insertion portion 15a of the core pin 15 may be changed according to the inner diameter of the insert material 3. (4) In the above embodiment, the core pin 15 and the support shaft 1
Although 0 and 0 are provided separately, they may be integrally formed.

[0033]

As described above in detail, according to the invention of claim 1, the fixture can be easily removed from the insert regardless of the mounting position of the fixture of the insert material and the method of opening the mold. In addition to the above, there is an excellent effect that the insert material can be surely attached at the time of molding.

Further, according to the second aspect of the invention, there is an excellent effect that it is possible to prevent concrete from entering the inside of the insert material during concrete molding.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a state in which a fixture according to an embodiment of the present invention is assembled to a mold.

FIG. 2 is likewise a sectional view showing a state where a concrete molded product is molded by a mold.

FIG. 3 is a partially cutaway sectional view showing a state in which an insert material is fitted to the core pin.

FIG. 4 is a partial cross-sectional view showing a state in which the insert material is fitted to the core pin when the concrete molded product is molded.

FIG. 5 is a partial cross-sectional view showing a state before concrete is poured into a concrete molded product.

FIG. 6 is a partial cross-sectional view showing a state in which the core pin is extracted from the insert material after the concrete molded product is molded.

FIG. 7 is likewise a partial cross-sectional view showing a state where a concrete molded product is taken out of the mold.

FIG. 8 is a partially cutaway sectional view showing a state in which an insert material is fitted to a core pin of another embodiment.

FIG. 9 is a cross-sectional view showing a state in which a concrete molded product is molded using the fixture of the conventional example.

[Explanation of symbols]

1a ... Outer formwork, 3 ... Insert material, 7 ... Fixture, 8 ...
A guide tube as a support portion, 9 ... Insertion hole, 10 ... A support shaft as a support portion, 15 ... A core pin as an attachment portion,
15d ... A raised portion as an engaging portion.

Claims (2)

[Claims] 1. A mounting portion (15) to which an insert material (3) is mounted and a concrete forming mold (1a), which is inserted into an insertion hole (9) formed in the mold (1a). Supporting portions (8, 10) for supporting the mounting portion (15) and moving the mounting portion (15) between a mounting position protruding toward the concrete molding surface side and a detaching position retracted toward the non-molding surface side. , 12), and a fixture for insert material in a concrete forming formwork. 2. A fixture comprising a mount (15) to which an insert material (3) is mounted, said mount (1).
5) An insert in a concrete molding formwork, characterized in that an engaging portion (15d) that engages at least between adjacent apexes of the female screw portion (5) formed inside the insert material (3) is provided. Material attachment.