JP2673793B2 - Insert temporary fixing jig for concrete products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete product produced by pouring ready-mixed concrete into a formwork, and more particularly to a concrete product which is buried on the surface of the concrete product with its end face exposed. Insert temporary fixing jig.

[0002]

2. Description of the Related Art Conventionally, in order to bury an insert in a concrete product, the insert is fixed at a predetermined position of a form, and ready-mixed concrete is poured and solidified in the form. Then, when the mold is removed, the insert is embedded at a predetermined position. As the first conventional example, as shown in FIG. 9, a hole 2 is formed at a predetermined position of a mold 1, an insert 3 is applied to the inside of the mold 1, and a bolt 4 penetrating the hole 2 is inserted.
Is screwed and fixed to the screw 5 of the insert 3. Then, after pouring ready-mixed concrete into the formwork 1 and solidifying the ready-mixed concrete, the bolt 4 is unscrewed and the formwork 1 is removed, the concrete product is taken out, and the insert 3 exposes the end face and is buried. To be done.

Further, as a second conventional example, as shown in FIG. 10, a resin fitting 7 having engaging legs 6 is fixed to the outer periphery of the insert 3. Then, an engaging hole 8 is formed at a predetermined position of the form 1, and the engaging leg 6 of the fixture 7 is engaged with the engaging hole 8.
To be engaged. Then, when ready-mixed concrete is poured into the formwork 1 and the ready-mixed concrete is solidified, if the formwork 1 is removed, the engagement between the formwork 1 and the engaging legs 6 is released, and the fixture 7 and the insert 3 Remains on the concrete product side, the insert 3 is exposed and buried on the surface, and the engaging leg 6
Is protruding. Then, if the engaging legs 6 are scraped off, the concrete product is taken out.

Further, as a third conventional example, the actual fairness 5-
There is "an insert metal fitting support device for a mold" disclosed in No. 30886. In this, the support shaft 17 is supported by one of the molds, that is, the outer frame 4, and the base portion 17b of the support shaft 17 is projected inside the mold. Then, the insert fitting 18 is inserted into the base portion 17b, and both ends of the insert fitting 18 are sandwiched between the molds on both sides, that is, the outer frame 4 and the inner frame 3.

[0005]

In the above-mentioned first conventional example, every time the mold 1 is assembled, a large number of bolts 4 are tightened to attach the insert 3, and the bolts 4 are screwed when the mold 1 is removed. I have to take it off, so it takes time and effort,
There is a problem that the operation becomes complicated.

Further, in the second conventional example, the work of attaching and detaching the insert 3 to and from the mold 1 is simple, but on the other hand,
Since it is necessary to provide the fixture 7 having the engagement legs 6 on the outer periphery of the insert 3, there arises a problem that the cost of the insert 3 becomes high.

Further, in the third conventional example, when one end of the insert fitting 18 is in a free supporting state or when there is a gap between one end of the insert fitting 18 and the inner frame 3. There is a possibility that the insert metal fitting 18 may come off, and there is a problem that it cannot be applied.

Further, in the directional insert, for example, the insert having the holes for passing the reinforcing bars, the holes for passing the reinforcing bars of the plurality of inserts must be aligned in a predetermined direction. In the conventional example, there is a problem that it is difficult to correct the mounting angle after attaching the insert to the mold.

The present invention has been made in view of the above circumstances, and an object thereof is to reduce the cost, simplify the work, and adjust the mounting angle after the insert is mounted on the mold. The purpose is to provide an insert temporary fixing jig for concrete products.

[0010]

DISCLOSURE OF THE INVENTION The present invention provides an insert which is embedded on the surface of a concrete product with its end surface exposed.
An insert temporary fixing jig for a concrete product temporarily fixed to a form, which is slidably and non-rotatably attached to the form and penetrates a hole of the form, and a tip of the actuating rod. Has an elastic piece that is slidably and rotatably attached to the outer peripheral portion, has an external thread formed on the outer peripheral portion, and has an expanded portion formed on the inner peripheral portion, and the operating rod is inserted into the expanded portion. When the male screw has a connecting member that expands in diameter so that it can be screwed into the female screw of the insert, and a locked portion that locks with a plurality of locking portions formed on the end surface of the connecting member, the operating rod A locking member that is slidably and non-rotatably attached, and a spring that is interposed in the actuating rod and presses the locked portion of the locking member against the locking portion. Have.

[0011]

According to the insert temporary fixing jig for the concrete product of the present invention, the elastic piece of the connecting member is inserted into the hole of the form,
When the actuating rod is inserted into the expanded portion, the elastic piece expands in diameter and the male screw can be screwed into the female screw of the insert. Therefore, if the female screw of the insert is screwed into the male screw, the insert is temporarily fixed to the mold. When changing the mounting angle of the insert with respect to the form, further rotating the insert causes the insert to rotate around the operating rod together with the coupling member, and the locking portion and the locked portion change the locking position to The mounting angle is changed in units of one pitch of the locking portion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the insert temporary fixing jig 21 of the present invention will be described below with reference to FIGS. First,
In FIGS. 1 and 2, the actuation rod 22 is slidably and non-rotatably attached to a frame 24 attached to the form 23, and the form 23 is provided corresponding to the mounting position of the insert. And goes back and forth. The coupling member 26 is
The pin 27 inserted into the tip of the actuating rod 22 and driven into the actuating rod 22 keeps it from coming off. This coupling member 26 includes a plurality of elastic pieces 2 from a collar-shaped base portion 26a.
8 are erected. The elastic piece 28 is formed by dividing a tubular body into a plurality of pieces, for example, four pieces, and is elastically deformed. A large-diameter hole 29 is formed in the inner peripheral portion of the base portion 26a.
An expanded portion 31 having a diameter smaller than that of the hole 29 is formed in the inner peripheral portion on the tip side through the inclined portion 30. The tip of the elastic piece 28 is normally reduced in diameter, and when the actuating rod 22 is inserted into the expanding portion 31, the diameter is expanded and a male screw 32 formed on the outer peripheral portion is formed.
Can be screwed into the female screw 42 of the insert 41 (see FIGS. 4 and 5). The insert 41 has a female screw 4 at the base end.
2 is formed, the tip portion is formed flat, and a hole 43 for passing a reinforcing bar is formed therein. A plurality of locking recesses 51 serving as locking portions are formed on the end surface of the base portion 26a of the coupling member 26 and have a triangular cross section. The locking member 52 is in the shape of a disc, and has locking projections 53 as a plurality of locked parts that are locked in the locking recess 51 on the end surface.
Are formed. Although not shown, the locking member 52 is provided with a convex portion that engages with a key groove formed in the actuation rod 22, or a hole that is fitted into the square or oval actuation rod 22 is provided. Is attached to the actuating rod 22 so as to be slidable and non-rotatable. In addition, the locking convex portion may be formed as the locking portion and the locking concave portion may be formed as the locked portion, and the sectional shape is not limited to the triangular shape and may be appropriately selected.

The spring 54 is inserted into the actuating rod 22 and the pin 3
By means of 3, the interlocking member 53 is interposed between the washer 55 that is in the retaining state with respect to the actuating rod 22 and the engaging member 52, and the engaging convex portion 53 is pressed against the engaging concave portion 51. The elastic piece 2
A spring 56 is attached to the outer periphery of 8, the end surface of which is in contact with the mold 23.

Next, the operation of the above configuration will be described. 1. First, the insert temporary fixing jig 21 is advanced toward the mold 23, and the coupling member 26 is inserted into the hole 25 (see FIG. 2). Then, the coupling member 26 is compressed while compressing the spring 56.
The base portion 26a of the above is brought into contact with the form 23 (see FIG. 3). As a result, the tip of the elastic piece 28 projects into the mold 23. 2. Next, the tip of the actuating rod 22 is pushed into the expanding portion 31 via the inclined portion 30 of the coupling member 26 while compressing the spring 54. As a result, the tip of the elastic piece 28 is expanded in diameter, and the male screw 32 can be screwed into the female screw 42 of the insert 41 (see FIG. 4). 3. Then, a plastic washer 57 for preventing Toro leakage is applied to the end surface of the mold 23, and the female screw 42 of the insert 41 is screwed into the male screw 32 to temporarily fix the insert 41 (see FIG. 5). 4. By the way, the plurality of inserts 41 mounted on a straight line need to pass the reinforcing bars 44 through the holes 43 for passing the reinforcing bars. Therefore, it is necessary to adjust the direction of the hole 43 to be constant. In FIG. 5, the hole 43 faces the side. In this case, when the insert 41 is further rotated, the insert 41 and the coupling member 26 are integrated and rotate around the operating rod 22. Then, since the locking projection 53 does not slide on the surface of the locking recess 51, the locking member 52 compresses the spring 54 and retracts (see FIG. 6). Then, when the top of the locking projection 53 passes the end of the locking recess 51, the locking projection 53 locks in the adjacent locking recess 51. As a result, the mounting angle of the insert 41 with respect to the mold 23 changes by one pitch of the locking recess 51. If 36 locking recesses 51 or locking projections 53 are formed, the insert 41 can adjust the mounting angle in units of 10 degrees. Repeat this, hole 4
3 corresponds to a predetermined direction (see FIG. 7).

5. When the angles of the inserts 41 coincide with each other, the reinforcing bars 44 are passed through the holes 43 and concrete is poured. 6. When the concrete is hardened, first, the actuating rod 22 is pulled out from the expanding portion 31 of the connecting member 26, the tip of the elastic piece 28 is reduced in diameter, and the male screw 32 is released from the screw engagement with the female screw 42 ( (See FIG. 8). Therefore, insert temporary fastening jig 2
When 1 is retracted, it can be easily removed from the mold 23 by the elastic force of the spring 56.

According to the above embodiment, the following effects can be obtained. a. If the tip of the actuating rod 22 is pushed into the expanding portion 31 of the connecting member 26, the tip of the elastic piece 28 is expanded and the male screw 32
Can be screwed into the female screw 42 of the insert 41, and the insert 41 can be temporarily fixed. In addition, the operating rod 22 is connected to the connecting member 2
6 is pulled out from the expanded portion 31 of the female thread 6 of the male thread 32 of the male thread 32.
Since the screwing to 2 is released and the connecting member 26 can be pulled out from the insert 41, the bolt 4 is screwed and fixed to the screw 5 of the insert 3 one by one, and the bolt 4 is rotated and removed. Compared with the first conventional example, the mounting work is significantly simplified.

Further, since it is not necessary to add a special part for fixing the insert 41, the cost can be reduced as compared with the second conventional example which requires the fixture 7. c, the locking recess 51 is provided between the actuating rod 22 and the connecting member 26.
Since the engaging convex portion 53 is provided, the mounting angle with respect to the mold 23 can be easily adjusted even after the insert 41 is mounted, so that the directional insert 41 is easy to handle.

[0018]

Industrial Applicability The present invention is an insert temporary fixing jig for a concrete product, which is used to temporarily fix an insert embedded with the end face exposed on the surface of the concrete product to a formwork,
An actuating rod that is slidably and non-rotatably attached to the mold and penetrates a hole in the form, and a slidable and rotatably attached to the tip end of the actuating rod, and a male screw on the outer peripheral portion. Is formed and has an elastic piece in which an expanded portion is formed in the inner peripheral portion,
A connecting member for expanding the diameter of the male screw so that the male screw can be screwed into the female screw of the insert when the actuating rod is inserted into the expanding portion, and a cover member for locking a plurality of locking portions formed on an end surface of the connecting member. A locking member that has a locking portion and is slidably and non-rotatably attached to the actuation rod, and a locked portion of the locking member that is interposed in the actuation rod and that is the locking portion. Since it is equipped with a pressure contact spring, the temporary fixing work of the insert can be simplified, the cost can be reduced, and the angle can be adjusted even after the insert is attached to the formwork. It plays.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of the present invention.

FIG. 2 is a diagram showing a first step of temporarily fixing an insert to a mold.

FIG. 3 is a diagram showing the second step.

FIG. 4 is a view showing the third step.

FIG. 5 is a diagram showing the fourth step.

FIG. 6 is a view showing the fifth step.

FIG. 7 is a diagram showing the sixth step.

FIG. 8 is a diagram showing a step of removing a jig.

FIG. 9 is a cutaway front view showing a state in which an insert is held in a mold in the first conventional example.

FIG. 10 is a front view showing, in a cutaway manner, a state in which an insert is held by a mold according to a second conventional example.

[Explanation of symbols]

 21 Insert Temporary Fixing Jig 22 Actuating Bar 23 Formwork 25 Hole 26 Coupling Member 28 Elastic Piece 31 Expanding Part 32 Male Screw 41 Insert 42 Female Screw 51 Locking Recess (Locking Part) 52 Locking Member 53 Locking Convex (Target) Locking part) 54 Spring

Claims (1)

(57) [Claims] 1. An insert temporary fixing jig for a concrete product, which is used to temporarily fix an insert embedded with an end face exposed on the surface of the concrete product to a formwork, which is slidable and non-rotatable on the formwork. Attached to the actuation rod penetrating the hole of the mold, and slidably and rotatably attached to the tip of the actuation rod, forming an external thread on the outer peripheral part and expanding to the inner peripheral part. A connecting member which has an elastic piece formed with a portion, and which expands the male screw into a female screw of the insert when the actuating rod is inserted into the expanding portion; and a connecting member formed on an end surface of the connecting member. A locking member that has a locked portion that locks to a plurality of locking portions and that is slidably and non-rotatably attached to the operating rod, and the locking member that is interposed in the operating rod. And a spring that presses the locked portion of the Insert tacking jig over door products.