JPH0822542B2 - Stepping device for concrete molding frame - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step mounting device for a concrete molding frame for mounting a step on a wall of a concrete molding such as a manhole.

[0002]

2. Description of the Related Art As a concrete molded body (molded body), for example, as shown in FIG. 10, there is a manhole 1 used at an entrance / exit. The manhole 1 is formed so that the inner and outer diameters become smaller as it goes upward, and two projecting portions 2 are provided on the inner wall, and a plurality of rod-like steps S are provided between the projecting portions 2 to form a ladder. ing. Both ends of this step S are bent at right angles and embedded in a concrete molding.

In general, a molding frame for molding the manhole 1 is provided with an outer mold which is divided and released from the mold, and an inner mold. In this molding frame, the conventional step mounting device is
As shown in FIG. 11, a main body mold 3 which is provided in a part of the inner mold and which molds the general surface of the inner wall of the manhole 1 where the wall surface facing the step S and the mounting portion surface thereof are opened, and the main body mold 3 described above. There is provided a pair of split molds 5 that are fitted into the open portion 4 and mold the wall surfaces facing each other in step S. 6 is step S
2 is a cutout portion of a mold 5 that holds both end sides of the main body die 3 together with the edges of the open portion 4 of the main body die 3.

Then, at the time of assembling the mold, the step S is performed by the opening portion 4
And the mold 5 is manually fitted into the open portion 4 to hold the step S, and the bolt 8 is inserted through the fixing metal fitting 7.
It is fixed to the main body mold 3 with. After that, the fluidized concrete is poured between the outer mold and the inner mold to cure for a required time. When taking out the product, the outer mold and inner mold are demolded, and the manhole 1
Get the product. When removing the inner mold, first, the bolt 8 is removed to remove the fixing metal fitting 7 and the split mold 5, and then,
The body mold 3 is demolded.

[0005]

By the way, in the above-mentioned conventional step mounting device, the mold part 5 is mounted by hand by using the fixing metal fittings 7 and the bolts 8 at the time of mold assembly, and at the time of taking out the product. Similarly, the work must be removed manually, and since the operation cannot be performed without entering the narrow inner mold, the work is complicated and the work efficiency is poor. Further, since the mold part 5 is separated and the fixing metal fittings 7 and the bolts 8 for fixing the mold part 5 are required, there is a problem that the parts management becomes complicated accordingly.

The present invention has been made in view of the above problems, and an object thereof is to make it easy to perform a mold assembly for mounting steps and to easily remove a mold, thereby improving work efficiency. is there.

[0007]

The technical means of the present invention for solving the above-mentioned problems is a step of a concrete molding frame in which the end of the step is embedded in the wall of the molding target and the step is mounted. In a mounting device, a main body mold for molding a general surface of a wall portion of a molded body, a partial mold for molding a wall surface facing a step and integrally provided on the main mold, and a uniting position and a portion for combining with the partial mold A movable body that is movably provided at two separated positions that are separated from the mold to the rear side, and a support portion that is provided in the partial mold and supports the steps,
And a pressing portion that is provided on the moving body and presses the supported step at the combined position against the supporting portion.

[0008]

According to this means, when the mold is assembled, the movable body is positioned at the separated position, and the step is supported by the support part of the partial mold,
Position the moving body at the coalescing position. This causes the step to be pressed against the bearing. In this state, concrete is poured to mold the molding target. Further, when the movable body is located at the separated position when the product is taken out, the step is released, and thus the molded body is released from the mold without the step interfering with others.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A step mounting device for a concrete molding frame according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show a step mounting device for a concrete forming frame according to a first embodiment. The concrete molding frame to which this embodiment is applied molds the manhole 1 shown in FIG. 10 as described above. This manhole 1 is formed so that the inner and outer diameters become smaller as it goes upward, and two protrusions 2 are provided on the inner wall, and a plurality of rod-shaped steps S are provided between the protrusions 2 (in the embodiment, 2).
3) It is erected to form a ladder. Both ends of this step S are bent at right angles and embedded in a concrete molding.

As shown in FIG. 2, the concrete forming frame to which the embodiment is applied is an iron plate forming body. The concrete forming frame is divided into two parts, which are moved on the rail 10 to be removed from the mold, and on the rail 10. And an inner mold 12 that is supported.

In this molding frame, the step mounting device 20 according to the embodiment has an inner mold 1 as shown in FIGS.
2 is provided and molds a main body mold 21 for molding the general surface of the inner wall of the manhole 1 and a wall surface facing step S, and a gap C through which the end of step S can pass when the manhole 1 is released from the mold. And a partial mold 22 that is formed between the mold and the main mold 21. The partial mold 22 is supported on the rail 10 together with the main mold 21, and is provided integrally with the main mold 21.

Reference numeral 23 denotes a moving body, which is a partial mold 22.
On the rear side, the rail 10 is rotatably provided so as to be movable to two positions, a combined position A where the partial mold 22 is combined and a separated position B where the partial mold 22 is separated. Further, as shown in FIG. 2, the moving body 23 faces the gap C formed between the main body mold 21 and the partial mold 22 at the merged position A, and the wall portion of the manhole 1 corresponding to this gap C is formed. A molding surface 24 for molding is provided.

Reference numeral 30 is a lower support portion provided on the partial mold 22 and supporting the lower step S. The lower support portion 30 is formed by a notched step portion formed in a member forming the partial mold 22. Reference numeral 31 is an upper support portion that is provided on the partial mold 22 and supports the upper step S. As shown in FIGS. 3 and 4, the upper support portion 31 is rotatable about the beam member 25 forming the partial mold 22 and is provided in parallel with the step S.
2, a pair of support pieces 33 fixed to the shaft 32 and positioned at a support position X and a retracted position Y that support the step S in cooperation with the beam member 25 by the rotation of the shaft 32, and the shaft 32.
And a lever 34 which is fixed to the member 26 and abuts against the member 26 constituting the partial mold 22 to position the support piece 33 at the support position X. Further, at the retracted position Y of the support piece 33, passage of the lower step S is allowed at the time of demolding.

Reference numeral 35 denotes a lower pressing portion which is provided on the moving body 23 and presses the step S supported by the lower supporting portion 30 at the combined position A against the lower supporting portion 30. The lower pressing portion 35 is formed by a notched step portion formed in a member forming the moving body 23. Reference numeral 36 denotes an upper pressing portion that is provided on the moving body 23 and presses the step S supported by the upper supporting portion 31 on the upper supporting portion 31 at the combined position A. The upper pressing portion 36 is formed on a member that constitutes the moving body 23, and includes the step S to cover the beam member 25 and the support piece 3.
It is formed by a substantially U-shaped notch that presses against 3. A rubber 37 elastically contacting the step S is attached to a lower piece of the U-shaped upper pressing portion 36.

Reference numeral 40 denotes a moving mechanism for moving the moving body 23 to the combined position A and the separated position B. This moving mechanism 40
As shown in FIG. 1, a rotary shaft 41 rotatably supported by the main body die 21, a first link 43 fixed to the rotary shaft 41, and one end axially supported by the first link 43. The other end is composed of a second link 44 pivotally supported on the rear side of the moving body 23. Then, the knob 45 provided on the rotating shaft 41 is rotated in the R1 direction in FIG. 1 by the rotating rod 46 so that the first link 43 and the second link 44 are extended and the moving body 23 is brought to the combined position A. The first link 43 and the second link 44 are bent by rotating in the R2 direction in 1 to move the movable body 23.
To the separated position B.

Therefore, when the manhole 1 is molded by this concrete molding frame, it is as follows.

First, in the mold assembly prior to molding, FIG.
Further, as shown in FIG. 5A, in the step attachment device 20, the rotation shaft 41 of the moving mechanism 40 is rotated in the R2 direction in FIG.
4 is bent to move the movable body 23 to the separated position B, and at this separated position B, the step S is placed on the lower support 30 and the upper support 31 of the partial mold 22. Next, the movement mechanism 40 extends the first link 43 and the second link 44 by rotating in the R1 direction in FIG. As a result, the lower pressing portion 35 of the moving body 23 presses the step S supported by the lower supporting portion 30, and the upper pressing portion 36 presses the step S supported by the upper supporting portion 31. Therefore, it suffices to support the step S and move the moving body 23 to the united position A.
The step S can be installed very easily, and the work can be performed easily.

In this state, the outer mold 11 is positioned at the molding position, and then fluidized concrete is poured between the outer mold 11 and the inner mold 12 to cure for a required time.

At the time of taking out the product, first, the outer mold 11 is demolded. Next, as shown in FIG. 5B, the moving mechanism 40
By rotating the rotating shaft 41 in the R2 direction in FIG. 1, the first link 43 and the second link 44 are bent to move the moving body 23 to the separated position B. As a result, the pressing of step S by the lower pressing part 35 and the upper pressing part 36 of the moving body 23 is released, and step S is released.

In this state, as shown in FIG. 5 (c), the product is lifted by a crane or the like and released from the mold. In this case, since the pressing of step S is released and step S is released, a gap C through which the end of step S can pass is formed between the main body mold 21 and the partial mold 22, S passes through this gap C and is demolded. At this time, the lower step S abuts the support piece 33 of the upper support portion 31, but as shown in FIG.
Is pushed and rotated to the retracted position Y, so that the step S on the lower side passes without being blocked by the support piece 33. Therefore, it is only necessary to set the moving body 23 to the separated position B and lift the product, so that the mold releasing is extremely easy and the work is easily performed.

6 to 9 show a step attachment device 50 for a concrete forming frame according to the second embodiment.
This embodiment is applied to the manhole 1 that forms a ladder by arranging a plurality of U-shaped steps Sa (two in the embodiment) on the circumferential surface. Both ends of this step Sa are bent at right angles and embedded in a concrete molding.

The step attachment device 50 is provided in the inner mold as described above, and includes a main body mold 51 for molding the general surface of the inner wall of the manhole 1 and a lower step Sa connected to the main body mold 51. A partial mold 52 for molding the opposing wall surfaces,
The rail 53a is slidably provided so as to be movable to two positions, a combination position A where it is combined with the partial mold 52 and a separation position B where it is separated from the partial mold 52, and the mounting surface of the upper step Sa is molded. And a moving body 53.

Reference numeral 54 is a support portion 54 provided on the partial mold 52 and supporting the lower step Sa. The support portion 54 is provided with a notch concave portion 54a into which the end portion of the step Sa is inserted into the die portion 52a of the partial die 52 from above.

The moving body 53 is composed of a pair of mold halves 55, 55. The pair of split molds 55 are provided on the upper and lower sides and are pivotally supported on the rear side so as to be capable of opening and closing with each other.
5a. Further, each of the mold halves 55 is provided with a holding portion 56 which is provided at a portion facing each other and receives the step Sa when opened and jointly holds the end portion of the step Sa when closed. The holding part 56 is formed by a notch formed in the template of the split mold 55 so as to hold the end of step Sa. A rubber 57 is interposed in the gap between the holding portions 56.

Reference numeral 58 designates a holding portion which is provided on the moving body 53 and which holds the step Sa supported by the support portion 54 at the combined position A against the support portion 54. The pressing portion 58 is configured by the lower end of the template of the lower split mold 55 that constitutes the moving body 53. A rubber 59 is provided in the gap between the support portion 54 and the pressing portion 58.

Therefore, when the manhole 1 is molded with this concrete molding frame, the following is done.

First, in the mold assembly prior to molding, in the step attachment device 50, the moving body 53 is set to the separated position B, and at this separated position B, the step Sa is placed on the support portion 54 of the partial mold 52. Further, also in the moving body 53, the mold 55 is opened and closed to hold the step Sa on the holding portion 56. Then, as shown in FIG. 6, the moving body 53 holding the step Sa is slid to the combined position A. As a result, the step portion Sa supported by the support portion 54 is pressed by the pressing portion 58 of the moving body 53. Therefore, the moving body 53 is supported at step Sa by supporting the step Sa.
Since it is only necessary to install the step Sa, the step Sa can be mounted very easily, and the work can be performed easily. In this state, the outer mold is positioned at the molding position, and then the fluidized concrete is poured between the outer mold and the inner mold to cure for a required time.

At the time of taking out the product, first, the outer die is released. Next, as shown in FIG.
After opening 5, slide it to the rear side to move to the separated position B. As a result, the movable body 53 is separated from the upper step Sa, and the pressing of the lower step Sa by the pressing portion 58 of the movable body 53 is released.
Is released.

In this state, the product is lifted by a crane or the like and released from the mold. In this case, since the step Sa is released and the step Sa is released, the product is released from the mold without the step Sa coming into contact with others.
Therefore, it is only necessary to move the movable body 53 to the separated position B and lift the product, so that the mold releasing is extremely easily performed.
Work is easy.

The above embodiment is applied to a manhole molding frame, but the invention is not limited to this and may be used for a molding frame for other concrete molded products such as a fire protection water tank.

[0032]

As described above, according to the step attaching device for the concrete forming frame of the present invention, when the mold is assembled,
The step can be held in the partial mold only by supporting the step on the support portion and positioning the moving body at the joining position, and at the time of demolding, the step is released by releasing the step by simply moving the moving body to the separated position. Therefore, it is possible to easily assemble and demold the mold, and accordingly, the workability is improved and the work efficiency is significantly improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a step mounting device for a concrete molding frame according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a concrete molding frame to which the step attaching device according to the first embodiment of the present invention is applied.

FIG. 3 is a rear view showing a partial mold of the step attaching device according to the first embodiment of the present invention.

FIG. 4 is a main part view of a step mounting device according to a first embodiment of the present invention.

FIG. 5 is a process drawing showing a state during molding and demolding of the step attaching device according to the first example of the present invention.

FIG. 6 is a cross-sectional view showing a step attachment device for a concrete forming frame according to a second embodiment of the present invention.

FIG. 7 is a front view of relevant parts showing a step attachment device for a concrete forming frame according to a second embodiment of the present invention.

FIG. 8 is a plan view of relevant parts showing a step mounting device for a concrete forming frame according to a second embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a state when the step attaching device according to the second embodiment of the present invention is released from the mold.

FIG. 10 is a perspective view showing an example of a concrete molded body molded by a concrete molding frame to which the present invention is applied.

FIG. 11 is a perspective view showing an example of a conventional step attachment device for a concrete molding frame.

[Explanation of symbols]

 S Step 1 Manhole (molded object) 10 Rail 11 Outer mold 12 Inner mold 20 Step mounting device 21 Main body mold 22 Partial mold C Gap 23 Moving body A Combined position B Spaced position 30 Lower support part 31 Upper support part 33 Supporting piece X support position Y retreat position 35 lower pressing part 36 upper pressing part 40 moving mechanism Sa step 50 step mounting device 51 main body type 52 partial type 53 moving body 54 bearing part 55 split type 52 holding part 58 holding part

Claims (1)

[Claims] 1. A step attachment device for a concrete molding frame in which an end portion of a step is embedded in a wall portion of a molding target to mount the step, a main body mold for molding a general surface of a wall portion of the molding target, and a step. And a moving body that is provided movably at two positions, that is, a partial mold that is formed integrally with the main body mold while molding opposing wall surfaces, and a combined position where the partial mold is combined and a separated position that is separated rearward from the partial mold. , A step of a concrete molding frame comprising a support portion provided on the partial mold for supporting the step, and a holding portion provided on the moving body for pressing the supported step at the joining position against the support portion. Mounting device.