JPH06102914B2 - Waterway molding formwork for machine placement - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-casting mold for machine-casting, which is applied to, for example, waterways of highways, general roads, subways and the like, and also to runways and waterways of parking lots.

[0002]

2. Description of the Related Art Conventionally, the construction of a waterway has been done by hand rather than by placing it mechanically. First, the form is continuously assembled and fixed on the base made of concrete. Next, by suspending a cylindrical rubber tube in the formwork at regular intervals (for example, every 1 m or 2 m), the rubber tube is suspended and held in the air, and the reinforcing bars are also suspended in the formwork. Suspend in a floating state. Then, add ready-mixed concrete and keep the rubber tube and rebar suspended until the concrete solidifies,
When the concrete solidified, it was demolded to form a water channel in the structure.

[0003]

[Problems to be Solved by the Invention] The conventional construction has the following problems. First, since the rubber tube is hung at regular intervals (for example, every 1 m or 2 m), it hangs down due to its own weight, or there is a lateral shift, so that the waterway itself inside the structure is wavy. It will be completed in such a state.

Further, since the rubber tube is in a static state until the concrete is solidified, the air released in the process of solidifying the fresh concrete cannot fully escape from the outer periphery of the bottom of the rubber tube, and an air reservoir called a junker is here. Traces were formed.

The poor moldability and poor accuracy of such a water channel naturally have a negative effect on water flow.

Secondly, since the reinforcing bars are also suspended in the form suspended in the form, they are often not accurately suspended at the designed positions. For this reason, the positions of the reinforcing bars in the structure were different, and it was not possible to place the ready-mixed concrete uniformly on the reinforcing bars. As a result, there is a possibility that the strength of the structure and eventually the water channel itself may be reduced.

Thirdly, the work of assembling the formwork on site causes the material of the formwork and the rubber tube to be scattered, which is inefficient and the productivity cannot be improved. Moreover, since pre-work and post-work such as installation of formwork and removal of formwork after solidification of concrete are required, rapid construction could not be performed.

The present invention eliminates the above-mentioned drawbacks, and improves the accuracy of water passage, the strength, the labor productivity, the swiftness and the workability of a machine that enables the construction of a waterway. The purpose is to provide a mold for the construction of waterways for construction.

[0009]

[Means for Solving Problems] In order to achieve the above object,
The present invention relates to a molding frame installed in a movable molding machine, in which a cylindrical frame body is internally provided in a molding chamber separated by a side wall and an upper wall of the molding frame body, and the upper wall is A machine characterized in that a mouth portion for forming and opening a drinking mouth is provided along the traveling direction, and a haunch portion composed of an inclined plate connected to the form body is provided at a lower end portion of the mouth portion. Provide a waterway mold for casting.

In this machine for forming a waterway for machine casting, the mold body is a cylindrical body, and the haunch portion is located about 1/4 from the lower end of the mouth along the tangential direction of the mold body. It is also characterized in that a distributor made of a triangular pyramid is provided on the upper part of the mold body located directly below the dropping port of the concrete or the like.

[0011]

The method of placing a waterway using the waterway molding form according to the present invention will be described. First, the ground serving as the base floor is compacted and floored. Then, a base on which the spacers are continuously integrally molded is mechanically placed on the base floor. This mechanical pouring is performed while applying vibration to the fresh concrete with a vibrator. Next, the reinforcing bar assembled in a predetermined shape is placed on the spacer. After that, the water channel molding form according to the present invention is horizontally installed in a molding machine, and the structure is continuously machine-punched by the water channel molding frame. This mechanical pouring is performed while applying vibration to the fresh concrete with a vibrator. The poured concrete is molded and demolded in the process of passing through the molding frame as the molding machine moves. A dummy is sandwiched between the drinking mouths of the demolded structure, and the inside of the waterway and the upper surface of the structure are finished with a mortarboard. The dummy will be removed after a predetermined time. A stopper made of an iron plate is installed on the end surface of the structure, and it will be removed after the completion of the casting molding.

The above-mentioned molding and demolding are in a mutually contradictory relationship when the upper part of the structure according to the present invention is protruded from the lower part. That is, in order to prevent the upper part from falling after demolding, low slump ready concrete is used and high pressure compaction is required by a vibrator. However, demolding does not proceed smoothly. On the other hand, in order to facilitate the demolding, if high slump ready concrete is used and the compaction is weakened, the upper part will drop after demolding.

However, in the present invention, the raw concrete of low slump is used and the high pressure is compacted by the vibrator. However, since the haunch portion has the inclined structure, the raw concrete is solidified in the process. Releases the dehydrated water-rich toro (composed of water, cement and sand) over the entire waterway surface. In other words, the amount of this toro concentrates at one lower part of the spout, and the slump of concrete in this part is locally raised to prevent the concrete from falling as a result. The force relationship during molding / demolding can be considered as follows. That is, the force P applied to the haunch portion from above due to gravity or internal pressure is decomposed into the frictional force Q between the green concrete and the inclined surface and the force R in the sliding direction of the green concrete, and the frictional force at the time of demolding is reduced. At the same time, since R> Q, the demolding goes smoothly.

In the above work, the mold body for molding the water channel is always provided inside the molding frame body and is moved in parallel with the movement of the molding frame body. There is no gap in the water flow, ensuring accurate water flow.

Moreover, since the mold moves along with the movement of the molding machine, the air floating during the solidification process of concrete does not stay on the lower surface of the mold, that is, the bottom surface of the water channel, and escapes into the air. In addition, during this solidification process, mortar called soot floats along with the air, but since this mortar is rubbed by the mortarboard that continuously moves to the mold after demolding, This will fill the air marks, improve the surface finish, and eventually contribute to the improvement of strength.

Since the molding of the water channel is completed by the movement of the molding machine for pouring concrete, quick construction is possible and labor can be reduced.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a water casting mold 1 for mechanical casting according to the present invention will be described in detail with reference to an embodiment shown in the drawings.

Reference numeral 2 denotes a molding frame body, which comprises a side wall 3 and an upper wall 5, and a mouth portion 9 for molding / opening a drinking mouth 7 is provided on the upper wall 5 along the traveling direction. In a molding chamber 11 separated by a side wall 3 and an upper wall 5 of the molding frame body 2, a cylindrical mold body 13 is provided over substantially the entire length. At the lower end of the mouth portion 9, a haunch portion 15 formed of an inclined plate connected to the mold body 13 is provided. The haunch portion 15 is suspended from the lower end of the mouth portion 9 at a position of about 1/4 along the tangential direction of the mold body 13 and connected to the mold body 13. Hopper 17
The upper wall 5 of the front part of the molding frame body 2 connected to is opened and serves as an input port 19. An auger 18 for pressurizing fresh concrete is internally provided in the hopper 17. Drop 19
In order to improve the flow of green concrete, a distributor 21 made of a triangular pyramid is provided on the upper part of the formwork 13 located immediately below
Is provided.

At the rear part of the molding frame body 2, an upper surface finishing iron 27 for finishing the upper surface 25 of the structure 23 and a waterway finishing iron 31 for finishing the waterway 29 are vertically movable. A protective cylinder 33 for inserting a dummy, which has the same shape as that of the trowel 31 for finishing the water channel, is connected to the rear portion of the trowel 31 for finishing the water channel so as to be vertically movable. Reference numeral 35 is a dummy, and 37 is a molding machine.

In the drawing, the side wall 3 of the molding frame body 2 is shown.
Also, ribs that are appropriately provided on the upper wall 5 are omitted.

Explaining the driving method, first, the ground, which is the base floor, is compacted and the floor is attached. Next, the base 39 is mechanically placed while applying vibration to the fresh concrete by the vibrator 38 by the molding machine 37. A spacer 41 is continuously integrally molded on the base 39. This mechanical pouring is performed while applying vibration to the fresh concrete by the vibrator 38. Next, the rebar 43 assembled in a predetermined shape is placed on the spacer 41. Thereafter, the water channel molding form 1 according to the present invention is horizontally installed in the molding machine 37, and the structure 23 is continuously mechanically driven by the water channel molding frame 1. This machine is installed with a vibrator 38
While applying vibration to the fresh concrete at. The poured concrete is molded and demolded in the process of passing through the molding frame as the molding machine 37 moves. A dummy 35 is provided on the mouth 7 of the demolded structure 23.
And the upper surface 2 of the structure 23 in the waterway 29.
5 is surface-finished by a top finishing iron 27 and a waterway finishing iron 31. The dummy 35 is removed after a predetermined time has elapsed. A stopper (not shown) made of an iron plate is installed on the end surface of the structure 23, and is removed after the completion of the casting molding.

The water casting mold for mechanical casting according to the present embodiment has the above-mentioned structure and therefore has the following actions and effects. First, in the above-described molding / demolding, the ready-mixed concrete is a low slump, and the vibrator 38 is used for high-pressure compaction.
Since 5 has an inclined structure, the water-rich toro component (consisting of water, cement and sand) that is dehydrated in the process of solidification of the fresh concrete is released to the entire surface of the water channel 29. In other words, this toro portion is concentrated at one lower portion 7a of the drinking spout, and the concrete slump in this portion is locally raised to prevent the concrete from falling as a result. The force relationship during molding / demolding can be considered as follows. That is, the force P applied to the haunch portion 15 from above by gravity or internal pressure is
The frictional force Q between the green concrete and the inclined surface and the force R in the sliding direction of the green concrete are decomposed to reduce the frictional force at the time of demolding, and since R> Q, the demolding proceeds smoothly. is there.

In the above work, the mold body 13 for molding the water channel 29 is always provided inside the molding frame body 2 and is moved in parallel with the movement of the molding frame body 2.
The vertical and horizontal displacements of 9 are not possible, and accurate water passage accuracy is guaranteed.

Moreover, since the mold moves along with the movement of the molding machine 37, the air floating in the process of solidification of concrete does not stay on the lower surface of the mold body 13, that is, the bottom surface of the water channel 29, and it stays in the air. Exit to. In addition, in the process of solidification, a mortar component called “air” also floats up along with the air, but this mortar component continuously moves to the mold body 13 after demolding. Since it is rubbed by the iron 31, the deaeration marks are filled, and the surface finish is also good.

Further, since the molding of the water channel 29 is completed by the movement of the molding machine 37 for pouring concrete, the construction can be carried out quickly and the labor can be reduced.

Furthermore, when mechanically placing the structure 23,
Since the spacer 41 integrally molded on the base 39 is continuously machine-punched and the reinforcing bar 43 is placed on the spacer 41, the positioning of the reinforcing bar 43 is easy and accurate. Therefore, since the reinforcing bars 43 are built in exactly as provided in the structure 23, the concrete is
3, the strength of the entire structure 23 is improved.

Furthermore, by inserting the dummy 35 immediately after demolding, the upper portions 45 on both sides of the structure 23 are kept in a tension relationship until the concrete is solidified through the dummy 35. Is further prevented.

The present invention is not limited to the above embodiment. For example, the cross-sectional shape of the water channel is usually circular as in the above-mentioned embodiment, but it may be other shapes, and therefore the mold body 13 for molding this also has a corresponding cross-sectional shape.

Although the upper surface of the structure is designed to be inclined slightly downward from the horizontal plane (shown by the alternate long and short dash line) (see FIG. 9), the upper wall 5 of the molding frame main body 2 is designed to be substantially horizontal because there is a set of concrete. It is desirable to be done. The side wall 3 of the molding frame body 2 is provided perpendicularly to the base as shown in FIG.
Further, as shown in FIG. 9, the base may be inclined and provided,
It can be adapted to the sectional shape of the structure.

The base end position of the haunch portion 15 can be appropriately changed depending on the diameter of the water channel 29. For example, in the case of the illustrated example, since the diameter of the water channel 29 is 200 mm, it is desirable that the proximal end position of the haunch portion 15 is about 1/4 of the lower end of the mouth portion 9, but the diameter of the water channel 29 is 300 mm to 400 m.
In the case of m, the position of about 1/3 is desirable.

[0031]

As described above, according to the water casting mold for mechanical casting according to the present invention, it is possible to cast a highly accurate water passage that does not undulate in the vertical and horizontal directions in a good finished state. There is an effect that the accuracy of water passage in the waterway is improved. Further, the surface finish is good, and the reinforcing bars are accurately incorporated in the structure, so that the strength of the entire structure is improved. Furthermore, since the molding of the water channel is completed by the movement of the molding machine for pouring the concrete, it is possible to perform a quick construction and reduce the labor.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a water casting mold for mechanical casting according to the present invention.

FIG. 2 is a plan view showing an embodiment of a water casting mold for mechanical casting according to the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

5 is a sectional view taken along line CC of FIG.

FIG. 6 is a front view of a molding machine in which the water casting mold for machine placing of FIG. 1 is installed.

7 is a plan view of a molding machine in which the water casting mold for machine placing shown in FIG. 1 is installed.

8 is a right side view of a molding machine in which the water casting mold for machine placing shown in FIG. 1 is installed.

9 is an enlarged cross-sectional view taken along line DD of FIG.

[Explanation of symbols]

 1 Water channel molding form 2 Molding form main body 3 Side wall 5 Upper wall 7 Drinking mouth 7a Drinking mouth lower part 9 Mouth part 11 Molding chamber 13 Formwork body 15 Haunch part 17 Hopper 18 Auger 19 Input port 21 Distributor 23 Structure 25 Top surface 27 Top finishing trowel 29 Water channel 31 Water channel finishing trowel 33 Protective tube 35 Dummy 37 Molding machine 38 Vibrator 39 Base 41 Spacer 43 Reinforcing bar 45 Upper 47 Lower

Claims (4)

[Claims] 1. In a molding frame installed in a movable molding machine, a cylindrical frame body is internally provided in a molding chamber separated by a side wall and an upper wall of the molding frame body, and the molding wall is provided on the upper wall. Is characterized in that a mouth portion for forming / opening a drinking mouth is provided along the traveling direction, and a haunch portion made of an inclined plate connected to the form body is provided at a lower end portion of the mouth portion. Waterway molding formwork for machine placement. 2. The water casting mold for mechanical casting according to claim 1, wherein the mold body is a cylindrical body. 3. The water casting mold for machine casting according to claim 1 or 2, wherein the haunch portion is about 1 / about from the lower end of the mouth portion.
A waterway molding formwork for machine placing, characterized in that the formwork form is connected from about 4 positions along the tangential direction of the formwork. 4. The water casting mold for mechanical casting according to any one of claims 1 to 3, wherein a distributor made of a triangular pyramid is provided on an upper portion of the mold body located directly below a dropping port for concrete or the like. A waterway molding formwork for machine placement.