JPH064203U - Fixture for insert material in concrete molding formwork - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a fixture for insert material in a concrete molding formwork, which is excellent in workability at the time of molding a fixture for mounting insert material and has high durability. [Structure] A fixture 7 for an insert material 3 in a concrete forming mold 1a is provided with a mounting bolt 11 penetratingly supported in a supporting hole 13 provided in the mold 1a, and in a state of being fixed to the mounting bolt 11. It is arranged on the concrete molding surface side of the mold 1 and is composed of a metal core pin 8 on which a resin insert material 3 is fitted and supported. Further, the core pin 8 has a tapered portion 10 that is tapered toward the tip.
have. Then, with the core pin 8 supported by the mold 1a, the insert material 3 is attached and the concrete molded product is molded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fixture for an insert material when molding a concrete molded product such as a U-shaped groove.

[0002]

[Prior art]

 Conventionally, in order to facilitate the movement of heavy concrete products, a method has been adopted in which a suspending device for suspension is attached at a predetermined location, and a wire is hung on this device and suspended by a crane. ing. As this type of locking tool, there is known one in which a bottomed cylindrical insert material having a female thread portion is embedded in a concrete molded product in advance and the locking tool is screwed and fixed to this insert material. There is. As a method of embedding and fixing such an insert material in concrete, there is a method disclosed in, for example, Japanese Utility Model Laid-Open No. 64-42104.

That is, an actuating rod is pierced and supported by a mold for concrete molding, and a cylindrical insert material having a bottom is fitted and supported by an inner side of the actuating rod, that is, a projecting portion on the concrete molding surface side, to operate. An operation lever is attached to the outside of the rod. Further, a rubber ring is fitted inside the operating rod, and by rotating the operating lever, the rubber ring is compressed and expanded in diameter so as to be in close contact with the inner peripheral surface of the insert material.

Then, in this state, concrete is poured between the molds to form a concrete molded product, and then the operating rod is pulled out from the insert material together with the rubber ring returned to the original position by the operation lever. After that, the mold is rotated and the mold is opened, and the molded product is taken out.

[0005]

[Problems to be solved by the device]

 However, in such a conventional technique, since the mold opening after molding is performed by pivoting around a single point, an actuating rod having an operating lever and a rubber ring is previously formed when molding a molded product. There is a problem in that workability is poor because it is necessary to support the molds through the mold, remove them from the mold after molding, and then open the mold. Moreover, since the rubber ring is repeatedly compressed and opened by the operating lever, there is a problem that the durability of the fixture for mounting the insert material is poor.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to form a fixture for attaching an insert material with excellent workability at the time of molding, and also with a durable concrete molding. The purpose of the present invention is to provide a fixture for insert material in a molding form.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the first invention, a supporting hole provided in a formwork is penetrated and supported, and a projecting portion projecting to the concrete molding surface side is externally fitted with and supported by a resin insert material. It is characterized in that concrete is placed in the form while being supported by the parts, and the form is opened after forming to hold the insert material in the concrete. The second invention is characterized in that the tip portion of the protrusion is formed in a tapered shape.

[0008]

[Action]

 In the first invention, the concrete molded product is molded with the support portion of the fixture being supported through the support hole of the formwork and the insert material being attached to the mount portion. After the molding, the fitting is separated from the insert material as the mold frame is opened, and the insert material is embedded in the concrete molded product. Therefore, it is not necessary to remove the attachment tool from the mold after molding, and workability can be improved.

In the second invention, since the mounting portion of the attachment is provided with the tapered portion having the tapered tip, when the mold is rotated and the mold is opened, the insert material is inserted. The attachment device can be smoothly extracted from the.

[0010]

【Example】

 An embodiment embodying the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, a mold 1 includes an inner mold 1b for molding an inner surface of a molded product and a pair of rotatably connected to both ends of the inner mold 1b via a rotation shaft 2. Outer mold 1a. When concrete C is poured into the molding space S formed by these molds 1a and 1b, a channel-shaped concrete molded product is molded. This molded product is used as a U-shaped groove.

As shown in FIG. 3, the insert material 3 has a bottomed tubular shape, and an internal thread portion 5 is screwed into the inner rear portion of the mounting hole 4. Then, a hanging metal fitting (not shown) to which the wire is attached is screwed 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.

The fixture 7 for burying the insert material 3 in the concrete C is supported by both outer molds 1 a at a position corresponding to the center of gravity of the concrete molded product P. The core pin 8 as a mounting portion constituting the mounting tool 7 is composed of the same diameter portion 9 on the side of the mold 1a and a tapered portion 10 on the tip side thereof. Then, the mounting bolt 11 as a support portion is inserted through the insertion hole 12 of the core pin 8 and the support hole 13 provided through the mold 1a, and is fixed by tightening the nuts 14a and 14b. It is attached to the frame 1a.

A cylindrical resin insert material 3 is hit with a hammer and fitted and fixed to the same diameter portion 9 of the core pin 8. At this time, as shown in FIG. 1, the end surface 3a of the insert material 3 is in close contact with the formwork 1a so that the concrete C does not enter the mounting hole 4 and the female screw portion 5 in the insert material 3 during concrete pouring. There is. The insert material 3 is made of nylon resin and has sufficient strength.

A spring washer 15 is interposed between the head 11a of the mounting bolt 11 and the core pin 8, and a washer 16 and a spring washer 17 are interposed between the mold 1a and the nut 14a. It is equipped. When the insert material 3 is attached to the core pin 8, the air in the internal space of the insert material 3 is discharged between the head portion 11a of the mounting bolt 11 and the tip end surface of the taper portion 10 and through the insertion hole 12 and the support hole 13. This facilitates the insertion and insertion of the insert material 3 into the core pin 8.

Next, the operation of the fixture 7 of the insert material 3 thus configured will be described. As shown in FIG. 4, the pair of outer molds 1a are rotated to both sides around each rotation shaft 2, and in that state, the core pins 8 are set so as to correspond to the support holes 13 of the mold 1a. By inserting the mounting bolt 11 and screwing the nuts 14a and 14b into the mounting bolt 11, the core pin 8 is fixedly fastened to the form 1a. Then, the insert material 3 is hammered into the core pin 8 to fit and fix the insert material 3 into the core pin 8.

Next, as shown in FIG. 5, both outer mold forms 1a are rotated inward to a vertical position. Then, in this state, the concrete C is poured into the molding space S from above. As shown in FIG. 6, after the concrete C is solidified, the outer mold 1a is rotated to both sides to open the mold. In this case, the core pin 8 fixed to the outer mold 1a moves together with the mold 1a, so that the core pin 8 comes out of the insert material 3 held in the concrete C at the same time when the mold is opened. At this time, since the core pin 8 is provided with the tapered portion 10, the core pin 8 can be smoothly extracted from the insert material 3.

Then, by lifting the concrete molded product P, the molded product P is released from the mold frames 1a and 1b. As described above, in this embodiment, since the attachment tool 7 including the core pin 8 and the mounting bolt 11 is clamped and fixed to the outer mold 1a, the attachment tool 7 is removed from the outer mold 1a after molding as in the conventional case. It does not need to be removed each time, the number of work steps can be reduced, and the workability of handling the fixture 7 is excellent. Moreover, since the core pin 8 is made of metal, it has sufficient durability against repeated driving and withdrawal of the insert material 3.

The present invention is not limited to the above-described embodiment, and may be embodied by changing the configuration as described below, for example, without departing from the spirit of the invention. (1) The support hole 13 of the mold 1a is made large in diameter, a small diameter portion is provided on the mold pin 1a side of the core pin 8 and the small diameter portion is fitted into the support hole 13, or the diameter and length of the mounting bolt 11 are set. Change according to the size of the core pin 8 and the size of the support hole 13. (2) As shown in FIG. 7, the core pin 8 is formed in a T-shape in cross section, and its tip end is inserted into the support hole 13 of the mold 1a, and at the same time, the side surface of the large-diameter portion 18 thereof contacts the mold 1a. Weld them together by welding. The hole 19 is used for venting air.

[0019]

[Effect of device]

 As described in detail above, according to this invention, the workability at the time of molding the fixture for mounting the insert material is excellent, and the durability is good.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a state in which a fixture of an embodiment embodying the present invention is attached and fixed to a mold.

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

FIG. 3 is an exploded perspective view showing a state in which the insert material is fitted to the core pin.

FIG. 4 is a sectional view showing the operation of the embodiment.

FIG. 5 is a sectional view showing the operation of the embodiment.

FIG. 6 is a sectional view showing the operation of the embodiment.

FIG. 7 is a sectional view showing another example of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Formwork, 1a ... Outer formwork, 1b ... Inner formwork, 3 ... Insert material, 8 ... Core pin as a mounting part, 11 ... Mounting bolt as a supporting part, 13 ... Support hole.

Claims (2)

[Scope of utility model registration request] 1. A support part penetratingly supported by a support hole formed in a mold for concrete molding, and a resin insert which is fixed to the support part and is arranged on the concrete molding surface side of the mold. An attachment tool for insert material in a concrete molding formwork, characterized in that the material is composed of a metal attachment part that is fitted and supported. 2. The fixture for an insert material in a concrete molding formwork according to claim 1, wherein the attachment portion has a taper portion that is tapered toward the tip.