JP3366470B2 - Method of manufacturing U-shaped groove with penetrating lifting inverting hole and formwork device therefor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a U-shaped groove having a lifting / reversing hole formed through a side wall of the U-shaped groove and a form forming apparatus therefor.

[0002]

2. Description of the Related Art Heretofore, as shown in FIG. 4, a U-shaped groove is generally known in which a lifting reversal hole is formed at substantially intermediate positions on both side walls of the U-shaped groove (positions of the approximate center of gravity of the U-shaped groove). Here, the U-shaped groove is heavy and weighs more than 1 ton, and it is particularly required that the demolding work from the mold be performed safely, and that the U-shaped groove be laid safely and quickly at a predetermined location. It had been.

Therefore, Shoji Takami, who is the inventor of the present invention or the father of the inventor of the present invention, can perform a safe demolding work of a large and heavy U-shaped groove, or a safe and quick laying work of the U-shaped groove. After repeated development and experimentation, at the same time as installing the formwork, the hoisting reversal hole forming jig can be easily installed in the formwork so that a hole for lifting and reversing can be made on the side of the U-shaped groove.
After solidification of concrete, the lifting reversal hole can be diverted and easily removed from the mold, and when the U-shaped groove is laid, the lifting reversal hole can be used to lay it very easily, quickly and safely. We have produced many inventions that have effects.

The reason why the U-shaped groove must be lifted and inverted is as follows. First, when the U-shaped groove is released from the mold, the U-shaped groove is in a state opposite to that in use, that is, an inverted U-shaped state. It is taken out in a state of being laid down in a letter shape. The generally manufactured U-shaped groove is stored in the storage place in this inverted U-shaped state. This is because the storage stability is higher in that state, and the storage efficiency is remarkably excellent because they are stacked in multiple stages.

Therefore, normally, when the U-shaped groove is transported to the laying site or is temporarily placed at the laying site, the U-shaped groove is formed into an inverted U-shape and is stacked in a plurality of stages. However, the U
When laying a U-shaped groove, it has to be raised and installed in a U-shape. Conventionally, many workers have raised the U-shaped groove from a reverse U-shaped state to a U-shaped state over a long period of time. It takes a long time to reach the laying place, and fine adjustment of the laying takes a long time (Because it is necessary to connect a plurality of U-shaped grooves instead of laying only one U-shaped groove, fine adjustment of the connection is required. U) and lay a U-shaped groove.

Since the inventor of the present invention and the father of the inventor of the present invention invented the epoch-making U-shaped groove with a lifting reversal hole and the formwork device thereof as described above, many concrete contractors or construction companies have made a leap forward. In addition to being able to shorten the work time, it was also possible to dramatically reduce the number of accidents involved in laying work. That is, if a member for forming a hoisting reversal hole is attached to a mold for manufacturing a U-shaped groove in advance and concrete is filled and solidified in that state,
This is because a U-shaped groove with a lifting reversal hole can be automatically manufactured, and using this hole, everything from demolding to laying work can be performed safely, quickly, and at extremely low cost.

Therefore, the total number of patents issued by the present inventor and Shoji Takami in this field exceeds 100. Here, the feature of these inventions is that the lifting reversal hole forming member is first made of metal. The U-shaped groove, which weighs as much as 1 ton, is lifted and inverted at two locations. This is because unless it is made of metal and has high rigidity, it will be damaged.

Next, the anchor portion is formed in a disk shape and attached at a substantially middle position of the metal pipe-shaped hole forming portion. If the anchor portion is not configured to project outward as described above, the lifting reversal hole forming member is embedded in concrete and shipped as a U-shaped groove product, and then the lifting reversal hole forming member is operated during the lifting reversal operation. This is because there was a risk that the lifting and reversing tool inserted in the hole would pull it off.

Further, the lifting reversal hole is a through type penetrating the side wall of the U-shaped groove. Normally, the U-shaped groove is flipped by inserting a hoisting reversing tool into the hoisting reversing hole on the outside, but in the actual site construction, the work space is extremely narrow, or the U-groove is excavated in the groove. In some cases, such as when laying, it may not be possible to work by inserting the lifting reversal tool into the hole on the outside of the U-shaped groove.

In such a case, a hole is also formed inside the U-shaped groove (thus, it is usually a through-type hole that penetrates the side wall of the U-shaped groove. This is less expensive and the hole forming work is simpler. That is why the lifting and reversing tool is inserted into this hole to carry out the laying work and fine adjustment.

[0011]

However, the above-mentioned jig for forming a lifting inversion hole has the following problems. That is, the hole forming portion is formed of a metal pipe member, and the side filled with concrete is also open.

Further, since no friction member is interposed between the support rod inserted into the hole forming portion and the concrete, when the concrete is filled, the concrete is lifted upside down and the reversing hole is installed. There was a case in which the installation jig was abutted against the forming jig and the installation location of the lifting inverted hole forming jig was shifted. Further, as described above, since the end of the hole forming part of the hoisting inverted hole forming jig is open even on the side where the concrete is filled, the concrete mortar is inserted through the opening into the hole forming part, that is, the cylindrical hollow part. However, there is a problem in that the support rod is solidified therein, and thus a very large ejection force is required when the support rod is pulled out from the mold.

Then, after repeated use, the hollow cylindrical portion of the hole forming portion becomes worn and becomes large, and the hoisting / reversing hole forming jig is easily removed from the support rod, which in turn hoists. Since the supporting rod that supports the inversion hole forming jig becomes thin, there is a problem that it must be replaced. Particularly in recent years, there has been a call for savings within companies, and general-purpose products that can be used many times tend to be used for as long as possible. From this point as well, U-shaped grooves with through-type lifting reversing holes are used. There has been a demand for improvement in the manufacturing method and the formwork apparatus.

Further, conventionally, in a so-called through-type U-shaped groove with a lifting reversal hole, the end of the metal lifting hole is exposed to the outside particularly in the lifting reversal hole formed inside. It was pointed out that the end part rusted over time, impairing the aesthetic appearance. In addition, it was pointed out that if left for a longer period of time, the inside of the concrete might be corroded from the end portion.

Thus, the present invention was devised in order to solve the above-mentioned problems. Concrete mortar is formed from the opening at the end on the inner formwork side of the hole forming part of the hoisting inverted hole forming jig, that is, the concrete forming mortar. Since it does not penetrate into the cylindrical hollow part, there is no need to replace the support rod that supports the lifting inversion hole forming jig in the form, it can be used as long as possible, and it was formed inside Since the end of the metal lifting hole is not exposed to the outside in the lifting reversal hole and there is no risk of the end rusting, it does not spoil the appearance and is left for a long time. Another object of the present invention is to provide a method of manufacturing a U-shaped groove with a through-type hoisting and inverting hole and a formwork apparatus therefor, which does not cause corrosion of concrete from the end portion.

[0016]

A through-type suspension according to the present invention
The manufacturing method of the U-shaped groove with the upside-down reversing hole and its formwork device are as follows.
It is configured as below. That is, the first invention
That manufacturing process of the feedthrough lifting inverted slotted U-shaped groove is substantially rectangular
Install a mountain-shaped inner mold, and then
Install a pair of plate-shaped outer molds at intervals, and
Insert the support rods from the outside of the formwork into the inner formwork side, and insert
The formed support rod has a metal pipe-shaped hole forming portion and the hole.
A disc mounted at a substantially right angle on the outer periphery of the forming part at a substantially right angle
Lifting reversal hole forming treatment with anchor-like overhanging part
Of the inner and outer molds fitted and fitted with the hole forming part of the tool
Fill the space with concrete, and after solidifying the concrete, mold
Remove the frame and remove the support rod from the outer frame.
In the method of manufacturing the U-shaped groove with the lifting inverted hole to be manufactured,
At the end of the hole forming part on the inner formwork side, the opening of the hole forming part is closed.
Fit a cap member made of a flexible member to close the
The cap member is closed at one end, and the closed portion is
It is possible to cut out with a size that is approximately equal to the inner diameter of the hole forming part.
And the other end is opened to form a substantially cylindrical shape, and the cap portion
The inner diameter of the material is the inner diameter at which the outer periphery of the hole forming part is approximately fitted
And the length of the inner diameter in the longitudinal direction of the cap member is
Adjustable length that fits the outer periphery of the hole forming part
It is said that the outer frame has a cap member fitted and lifted.
After attaching the reverse hole forming jigs respectively, the cap member
By pressing the closing part of the inner surface against the outer surface of the inner mold,
Adjusting the and making close contact with each other, install the outer mold, and
After filling the frame with concrete and solidifying the concrete,
U-shape with penetrating lifting inversion hole manufactured by removing the mold
The closed portion of the cap member is a U-shaped groove on the inner surface side of the groove.
It is exposed flush with the inner surface and the cap member is embedded.
When using the U-shaped groove for lifting,
Notch the closed part of the cap member by pressing and lift up the reverse hole
It is characterized in that it can be penetrated.

The invention according to the second aspect of the present invention is a substantially rectangular mountain.
-Shaped inner formwork, installed at a predetermined interval from the inner formwork
And a pair of outer molds in the form of a plate
Insert the support rods from the outside of the formwork into the inner formwork side and insert
The support rod is formed with a metal pipe-shaped hole forming portion and the hole shape.
Disk shape attached at a substantially right angle to the outer periphery of the growing part
Lifting reverse hole forming jig having an anchor part that overhangs
The hole forming part is fitted, and a space is provided between the inner mold and the outer mold.
Filled with concrete and after the concrete has solidified, the formwork is removed.
Forming device of U-shaped groove with lifting inverted hole created by molding
In the inner mold side end of the hole forming part,
A cap member made of a flexible member that closes the opening of
And the cap member is closed at one end and
The closed portion has a diameter substantially equal to the inner diameter of the hole forming portion.
It can be cut out, the other end is open and has a substantially cylindrical shape,
As for the inner diameter of the cap member, the outer periphery of the hole forming portion is substantially fitted.
The inner diameter of the cap member and the length of the cap member having the inner diameter
The length in the direction is adjusted so that the outer periphery of the hole forming part fits.
Adjustable length, hanging with the cap member fitted
Install the outer formwork to which each lifting hole forming jig is attached
Along with pushing the closing part of the cap member to the outer surface of the inner mold
With a penetrating lifting reversal hole that can be contacted and adhered
On the inner surface side of the U-shaped groove, the closing portion of the cap member is
The U-shaped groove is embedded flush with the inner surface of the U-shaped groove.
When using for lifting,
It is characterized in that it can be cut out and the lifting inversion hole can be made through type.
To do.

[0018]

In the present invention, the cap member made of a flexible member for closing the opening of the hole forming portion is fitted to the end of the hole forming portion on the inner formwork side. Therefore, even for the lifting reversal hole forming member that has been manufactured and sold so far, only the cap member is sold, and by fitting it into the conventional hoisting reversal hole forming member, the cost can be made extremely low and the effect of the present invention can be obtained. Can play.

The cap member has one end closed, and the closed portion can be cut out to have a diameter substantially equal to the inner diameter of the hole forming portion. The other end is opened to form a substantially cylindrical shape, the inner diameter of the cap member is an inner diameter into which the outer periphery of the hole forming portion is substantially fitted, and the length of the inner diameter is the outer periphery of the hole forming portion. The length of fitting is adjustable.

Therefore, after attaching the hoisting inversion hole forming jigs fitted with the cap members to the supporting rods protruding from the outer mold, if the inner mold and the outer mold are filled with concrete, It is possible to easily manufacture a U-shaped groove having a through-type hopping inversion hole. That is, on the side wall of the completed U-shaped groove,
By pressing a portion of the side wall where the head of the cap member is visible and notching the cap member, a U-shaped groove having a penetrating lifting reversal hole can be easily provided.

Moreover, the metal portion of the hoisting / reversing hole forming jig is covered with the cap member, so that the portion does not rust or corrode.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, reference numeral 1 indicates an inner mold. The inner mold 1 is formed in a substantially rectangular mountain shape as shown in the drawing. Next, reference numeral 2 indicates an outer mold. A pair of the outer molds 2 are installed at a predetermined interval from the inner mold 1, and the outer molds 2 have a flat plate shape, and the upper ends thereof are each bent inward.

Next, reference numeral 3 indicates a lifting and reversing forming jig.
The hoisting / reversing forming jig 3 has a hole forming portion 4 formed of a metal pipe, and a disk-shaped anchor attached to the hole forming portion 4 at a substantially intermediate position in the outer peripheral longitudinal direction so as to project in a substantially right angle direction. And part 5. As can be seen from the drawing, the anchor portion 5 has a plurality of through holes 13 ... Formed on the substrate 6, and the outer peripheral end portion of the anchor portion 5 is bent in a staggered manner. Are formed.

Further, reference numeral 8 indicates a cap member. The cap member 8 is formed of a flexible member such as a plastic member and has a substantially cylindrical shape with one end closed and the other end open. And the cap member 8
The inner diameter L of is the inner diameter with which the outer shape of the hole forming portion 4 fits (see FIGS. 5 and 6).

The inner diameter in the longitudinal direction of the cap member 8 is all set to the inner diameter L so that the width Y of the fit can be adjusted (see FIG. 6). Here, a method of manufacturing the U-shaped groove according to the present invention will be described. First, as shown in FIG. 1, holes 10 and 10 are formed at a predetermined position of the pair of outer molds 2 and 2 (a position that is the center of gravity of the U-shaped groove to be manufactured), and the holes 10 and 10 are formed. Outer formwork 2 and 2 so as to communicate
The nut-shaped holding members 11, 11 are fixed to the outside of the.

It is assumed that such an outer frame 2 is formed in advance. Next, the support rods 9 and 9 are attached to the holding member 11,
11 through holes 14 and 14 and the outer molds 2 and 2 through holes 10 and 10, and the supporting rods 9 and 9 are inserted into the molds while being screwed into the female screws of the holes 14 and 14 of the holding members 11 and 11. Make it project in the formwork. Further, as understood from FIG. 2, the lifting inversion forming jigs 3 are respectively inserted from the tip ends of the support rods 9 which are provided to project in the mold.

That is, the lifting inversion forming jigs 3 and 3 in which the cap members 8 and 8 having the inner diameter L are fitted on one end side (inner mold 1 side) are inserted into the support rods 9 and 9. After that, the outer molds 2 and 2 are installed at predetermined positions,
That is, both outer molds 2 are spaced apart from the inner mold 1 by a predetermined distance,
2 is erected. Then, along with this standing work, as can be understood from FIG.
The closing portion 15 of the cap members 8, 8 fitted into one end side (inner mold 1 side) of 3 is pressed against the inner mold 1 to close the closing portion 1.
5 is closely attached to the side surface of the inner formwork 1 to install the formwork member.

Here, since the hoisting inversion forming jig 3 and the flexible cap member 8 have a fitting width Y by the width of the cap member 8 in the longitudinal direction (see FIG. 6), they are manufactured. Even if the thickness of the side wall of the U-shaped groove is different, it can be sufficiently dealt with. From this state, concrete is filled as shown in FIG. 3 and cured for a predetermined time to solidify the concrete.

The demolding work after the concrete is solidified is almost the same as in FIGS. 8 to 11 showing the conventional example, and the pair of support rods 9 and 9 are rotated to be screwed into the holding members 11 and 11. Release and pull out. From that state, a pair of outer molds 2, 2
To the outside, and the pair of outer mold forms 2 and 2 are demolded.

After the outer molds 2 and 2 are demolded, the lifting tool 16 is inserted into the lifting reversal hole 12 on the outside of the U-shaped groove and lifted upward, so that the mold can be easily demolded. As can be understood from FIG. 4, the U-shaped groove at the beginning of manufacture does not expose the lifting reversal hole inward.

Only the closing portion 15 of the cap member 8 is exposed. However, U with a through-type hoisting reversal hole
When it is desired to use it as a groove, the closing portion 15 of the cap member 8 may be cut out as shown in FIG. This makes it easy to form a U-shaped groove with a through-type lifting reversal hole. Moreover, since the closing portion 15 can be cut out with a diameter substantially equal to the inner diameter H of the hole forming portion 4 (see FIG. 6), the lifting reversal hole forming jig 3 formed of a metal member is It will not be exposed to the outside and will not rust or corrode from this part.

As shown in FIG. 4, the cap member 8
A circular perforation or the like may be formed in the closed portion 15 so that it can be cut out.

[0033]

The present invention has the above construction. And
According to the method of manufacturing a U-shaped groove with a lifting reversal hole and the formwork apparatus thereof according to the present invention, concrete mortar is formed into a hole forming part from an opening at an end on the inner formwork side of the hole forming part of the lifting reversal hole forming jig In other words, since it does not penetrate into the cylindrical hollow part, it is not necessary to replace the support rod that supports the lifting inversion hole forming jig in the mold by wear, and it can be used for as long as possible, and Also, the lifting reversal hole can be easily formed, and the end of the metal lifting hole is not exposed to the outside of the lifting reversal hole formed inside.

Therefore, since there is no risk of rusting at the end, the appearance is not impaired, and even if the end is left for a long time, there is no risk of corroding the concrete from the end.

[Brief description of drawings]

FIG. 1 is a schematic view showing a usage state (No. 1) of a form device of a U-shaped groove with a through-type hoisting inversion hole of the present invention.

FIG. 2 is a schematic view showing a usage state (No. 2) of the form device of the U-shaped groove with the through-type hoisting inversion hole of the present invention.

FIG. 3 is a schematic view showing a usage state (No. 3) of the form device of the U-shaped groove with the through type lifting and inverting hole of the present invention.

FIG. 4 is a schematic view showing a U-shaped groove according to the present invention.

FIG. 5 is a schematic view showing a fitted state of an indicator rod, a lifting inversion hole forming jig, and a cap member.

FIG. 6 is a schematic view showing a state in which a closed portion of a cap member is cut out.

FIG. 7 is a perspective view showing a mounting state of an indicator rod, a lifting inversion hole forming jig, and a cap member.

FIG. 8 is a schematic view (part 1) showing a mounting state of a conventional example.

FIG. 9 is a schematic view (part 2) showing a mounting state of a conventional example.

FIG. 10 is a schematic view (3) showing a mounting state of a conventional example.

FIG. 11 is a schematic view (part 4) showing a mounting state of a conventional example.

[Explanation of symbols]

1 Inner formwork 2 Outer formwork 3 Lifting inversion hole forming jig 4 Hole forming part 5 Anchor part 6 substrate 7 bent pieces 8 Cap member 9 Pointing bar 10 holes 11 Holding member 12 Lifting inversion hole 13 through holes 14 Holding member hole 15 Block 16 lifting tools L cap member inner diameter Inner diameter of H hole forming part Y Cap member fitting width

Claims (2)

(57) [Claims] 1. A substantially rectangular mountain-shaped inner mold is installed, and then a pair of plate-shaped outer molds are installed at a predetermined interval from the inner mold, and from the outside of the pair of outer molds. Each inserts a support rod into the inner mold side, and the inserted support rod is formed into a metal pipe-shaped hole forming portion and a disc shape attached at a substantially right angle at a substantially intermediate position on the outer periphery of the hole forming portion. The hole forming part of the hoisting inversion hole forming jig having an overhanging anchor part is fitted, concrete is filled between the installed inner mold and outer mold, and after the concrete is solidified, the mold is removed from the mold. In addition, in the method of manufacturing a U-shaped groove with a lifting reversal hole, which is manufactured by removing the support rod from the outer mold, the opening of the hole forming part can be closed at the inner frame side end of the hole forming part. A cap member made of a flexible member is fitted and the cap member has one end closed and the closed portion. Can be cut out to have a diameter substantially equal to the inner diameter of the hole forming portion, the other end is opened to form a substantially cylindrical shape, and the inner diameter of the cap member substantially fits the outer periphery of the hole forming portion. An inner diameter, and a length of the inner diameter in the longitudinal direction of the cap member is such that the length of the outer periphery of the hole forming portion can be adjusted. After mounting the inversion hole forming jigs respectively, press the closed portion of the cap member against the outer surface of the inner mold to adjust the fitting width and closely contact the outer mold to install the inner mold. The outer mold is filled with concrete, and after solidifying the concrete, the mold is removed from the mold, and the closed portion of the cap member is U-shaped on the inner side surface of the U-shaped groove with a through-type lifting and reversing hole produced. It is exposed so that it is flush with the inner surface of the groove and the cap member is embedded, When the U-shaped groove is used for lifting, the blocking portion is pressed to cut out the blocking portion of the cap member so that the lifting reversing hole can be penetrated.
Method of manufacturing a groove. 2. An inner mold having a substantially rectangular mountain shape, and a pair of plate-shaped outer molds installed at a predetermined interval from the inner mold, the pair of outer molds being provided. The support rods are inserted into the inner mold side from the outside, and the inserted support rods are formed into a metal pipe-shaped hole forming portion and a disc-like shape which is attached at a substantially right angle to the intermediate position of the outer periphery of the hole forming portion. The hole forming part of the hoisting inversion hole forming jig having an anchor part that overhangs is fitted, the concrete is filled between the inner mold and the outer mold, and after the concrete is solidified, the mold is removed from the mold. In a U-shaped mold device with a lifting inverted hole, a cap member made of a flexible member for closing the opening of the hole forming part is fitted to an end of the hole forming part on the inner mold side. The cap member has one end closed, and the closed portion has a large diameter substantially equal to the inner diameter of the hole forming portion. And the other end is opened to form a substantially cylindrical shape, and the inner diameter of the cap member is an inner diameter into which the outer periphery of the hole forming portion is substantially fitted, and the cap member longitudinal length of the inner diameter. The length in the direction is such that the length of the outer periphery of the hole forming portion can be adjusted, and the outer formwork to which the lifting reversing hole forming jig with the cap member is attached is installed. The closed portion of the cap member is pressed against the outer surface of the inner mold frame to allow close contact, and the closed portion of the cap member has the closed portion on the inner side surface side of the U-shaped groove with a through-type lifting reversal hole manufactured. The U-shape with a through-type lifting reversal hole, which is embedded flush with the inner surface of the U-shaped groove, and is capable of notching the closing portion when the U-shaped groove is being lifted and used to penetrate the lifting reversal hole. Groove formwork device.