JPH10205133A - Upper surface single action holding jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the execution property by molding a lower surface by an upper surface shape regulating means so that the upper surface is of a desired shape after concrete is hardened, and continuously urging the upper surface shape regulating means by an urging means to the upper surface until the concrete is hardened while the placed concrete is soft. SOLUTION: Concrete is poured in a mold 11. When a rough grading is performed, gravel is settled, and slag appears on the surface. An opening part of the mold 11 is covered by a molding plate 21. When the slag is covered by the molding plate 21, a leg 29 of an arch member 24 is provided astride the opening part of the mold 11, the arch member 24 is expanded outwardly, and rides over a single pipe 12, and lowered. When a hand is off, the leg 29 is returned to the original shape by elasticity, and an arc-shaped part 28 is hooked by the signal pipe 12. A strap 27 is located on the molding plate 21. A positioning bolt 26 is turned, and the molding plate 21 is pressed against the concrete upper surface before it is hardened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a top-end press-down jig, and more particularly, to a rising wall of a concrete building,
For example, the present invention relates to a top-end press-holding jig suitable for use as a press-down press such as a top end of a handrail of a passage in an apartment, a top end of a veranda handrail, or a top end of a parapet of a concrete building.

[0002]

2. Description of the Related Art In recent years, with regard to finishing a rising edge of a concrete building, a one-shot presser is often specified. The one-shot presser means that the iron tip is applied immediately before the concrete is cast and before the concrete is hardened to finish the top end, instead of the ironing which has been performed again after the concrete is hardened. For example, magazine "Architectural Knowledge" 19
On page 74 of the September 1996 issue, the explanation is as follows. FIG. 1 of the same page is referred to as FIG. 8 of the present application.

[0003] In the one-shot holding section of the rising wall such as a parapet, the form above the water is built slightly higher, and the form below the water is adjusted to the inclination of the parapet top, and the height of the concrete top is adjusted. Without this treatment, it is difficult to use the gold trowel (it cannot be pressed well), and the smoothness of the top end and the edge will be poor (Fig. 1 (Fig. 8 of the present application), Photo 1). (Not quoted)) Also, if a slag is placed on the top of the formwork, the concrete will be pulled by the formwork during the removal of the formwork, and the edge will be chipped. If it is carefully removed or begins to harden after casting, tap the top of the form with a mallet to separate the top of the form from the concrete. "

[0004]

As described above, the one-shot presser requires time and labor both in forming the formwork and in the ironing work, and is poor in workability and profitability. In particular, as shown in FIG. 9, when a water gradient (A), a chamfer (B), a joint design (C), or the like is applied, labor is further increased, and workability and profitability are poor. In addition, the formwork is generally formed by a formwork carpenter who is a preceding process, bringing in materials (owned by himself). In order to save costs, the panels that have been dismantled after hardening the concrete will be brought back and reused at the next site.

[0005] For this reason, I hate that it cannot be reused,
Formwork carpenters generally do not want to cut control panels. Therefore,
In the case of the top of the rising wall, for example, as shown in FIG. 10, only the nail 8 or the pier 9 can be used to keep the contact, and the control panel is cut according to the height of the top. In many cases, they have not been there. This makes it difficult to perform one-shot presser. Therefore, even if it is designated as a single presser foot, it is often the case that the user goes to the site again after removing the formwork and finish the top end as additional work. This also has problems in workability and profitability.

At the time of placing concrete, an operator rides on the formwork. Naturally, concrete is poured between the formwork, but the formwork often sinks due to the large number of workers riding on it or due to the weight of concrete and equipment. If so, even if the form carpenter cuts off the top of the form, it would be useless.

Therefore, it is conceivable to use a method as described in, for example, Japanese Utility Model Laid-Open Publication No. 56-70047. This method is applied to the mortar foundation finishing of the concrete foundation of a building. Although it is the same building, it differs in both the field and the work allotment. When I looked at this, it came out, so quoting it, in this invention, the top holding plate 2 of FIG.
Is placed on the finished concrete as shown in FIG. The screw 5 is rotated to adjust the height and wait for curing in that state. (The reference numerals are those of Japanese Utility Model Laid-Open No. 56-70047.
As shown in FIG. )

[0008] However, this method is not suitable for a single presser press on the top of the rising wall. This is because this method may not be able to cope with the shrinkage that occurs during concrete hardening. As is well known, concrete shrinks as it hardens. For building foundations, this has little effect. This is because the foundation of a building is generally small in length (height) and the absolute amount of shrinkage is small. In addition, since they shrink in the same manner, the overall level is maintained, and the purpose of the mortar base finish is achieved.

On the other hand, the rising wall has a height of 1100 mm even for a handrail of an apartment passage, for example. Parapets are often higher. For this reason, the absolute amount of shrinkage is large. In Japanese Utility Model Application Laid-Open No. 70047/1981, when the casting is in a soft state after the casting, the top of the foundation is held down and fixed there. Therefore, when the concrete shrinks as it hardens, a gap is formed between the top holding plate 2 and the concrete top, and the shape cannot be accurately regulated until it hardens.

An object of the present invention is to solve such a problem and to reliably perform the work even for inexperienced ones, and to perform the work reliably even when a water gradient, chamfer, joint design, etc. are added. An object of the present invention is to provide an end-to-end presser jig. Another object of the present invention is to provide a top-end press-down jig which does not require cutting of a control panel (form plate), does not require the labor of a form carpenter, and can be reused.

[0011]

In order to achieve the above object, according to the present invention, there is provided a top end shape regulating means having a lower surface molded so that the top end becomes a desired shape after hardening of concrete, Biasing means for continuously biasing the top end shape regulating means abutting on the top end thereof while the concrete is hardened to the top end until the concrete hardens (claim 1).

The top end shape regulating means and the urging means are realized by the same elastic member. Further, the elastic member is styrene foam (claim 3).

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on illustrated embodiments. Jig 1 of the first embodiment
0 is shown in FIG. In the figure, 11 is a mold, and 12 and 13 are a single tube and a foam tie for supporting the mold 11.
FIG. 2 shows the configuration of the jig 10. The jig 10 includes a molded plate 21
And the presser 22. The molded plate 21 is made of polystyrene foam, and the lower surface is slightly inclined. this is,
This is for making the top end finish shape as shown in FIG. 9A, that is, the top end having a water gradient.

The shape of the lower surface of the molded plate 21 is determined according to each specification. Of course, the shape is arbitrary, but as shown in FIG. 9, it can be divided into several types. Therefore, it is also possible to prepare several types of shaped plates 21 and to select and use them according to the specifications. Further, as shown in FIG. 7, a chamfering bar 23 having a triangular cross section is prepared separately from the molding plate 21, and this is adhered and fixed to a corner of the molding plate 21 to form a chamfering shape as shown in FIG. You may do it.

The holding member 22 includes an arch member 24, a positioning bolt 26, and a pad 27. The arch member 24 is bent inward so as to wind the single tube 12 at its lower end to form an arc-shaped portion 28. A tap is cut at the center of the upper horizontal part, and there is a positioning bolt 2
6 is screwed. At the lower end of the positioning bolt 26,
A rotatable pad 27 is attached to the bolt.

The jig 10 is used as follows. First, concrete is poured into the mold 11. Next, roughing is performed. This will cause the gravel to sink and the surface to stick.
Then, the opening of the mold 11 is closed with a molding plate 21 like a dropping lid. Unlike the drop lid, however, there is no gap between the mold 11 and the molding plate 21. In the case of handrails, the width 150 is standard. Therefore, the width of the molded plate 21 is 150 mm from the beginning,
The lower surface is preferably formed so as to have a slope corresponding to a water gradient. If several types of non-standard widths are prepared, it will be easier to respond.

The length is arbitrary. Considering the convenience of handling and the convenience of molding, about 2m is appropriate. This is adjusted to the length of the handrail and used as it is or cut. Because it is Styrofoam, it can be easily cut with a cutter or the like, and is suitable for site adjustment. It is also preferable to form with rubber. In this case, both styrene foam and rubber are prepared, and the rubber is used without cutting, and the styrene foam is cut and used at an odd length. This is economical. It is good to use wood. The grain remains on the surface, giving a tasteful finish.

After the top of the noro is covered with the molded plate 21, the arch member 24 is attached to the single pipe 12. More specifically, the foot 29 of the arch member is straddled over the opening of the formwork 11, spread outward, ride over the single tube 12, and is lowered. If you release your hands, the feet 29 return to their original shape with elasticity, and the arc-shaped portions 28
Caught on At this time, the contact metal 27 is located on the molded plate 21. The positioning plate 26 is turned, and the molded plate 21 is pressed against the hardened concrete top.

According to the measurement by the inventor, the height 110
With a handrail of 0 mm, the difference (shrinkage) between the height immediately after casting and the height after curing was about 10 mm. The finishing height, for example, the height obtained by adding this shrinkage amount of 10 mm to 1100 mm is set as the set height of the molded plate 21 at this time. The amount of shrinkage is slightly different for each ready-mixed concrete (ready-mixed concrete), but is substantially constant if the composition (manufacturer) is the same. Therefore, usually, the shrinkage amount corresponding to the height is obtained with reference to the shrinkage ratio of the concrete obtained before that.
If you want to strictly control the height, it is advisable to take a sample during the pre-process at the site, for example, when placing concrete such as a skeleton or a slab, and check the amount of shrinkage.

As described above, the height of the mold 11 is often incorrect due to the presence of a person. Therefore, here, the height is adjusted with a level using the head of the positioning bolt 26 as an index. First, it is assumed that the dimensions of the designated handrail are, for example, a finishing height of 1105 mm in the middle of the gradient (the center of the width of 150 mm) with a water gradient. Further, the thickness of the center of the molded plate 21 (the center of the width of 150 mm) is 70 mm, the thickness of the metal plate 27 is 3 mm, and the total length of the positioning bolt 26 is 15 mm.
It is assumed that it is 0 mm. The height of the upper end of the positioning bolt 26 to be obtained is, for example, a shrinkage amount of 10 mm and the dimensions 70 mm, 3 mm,
It is 1338 mm with 150 mm added.

There are at least two ways to cover the molded plate 21. First, a method of covering a molded plate without strictly controlling the height of the slag will be described. For example, assume that the total length of the handrail is 20 meters. First, the ready-mixed concrete is driven into the entire length or a suitable length in the middle, and the roughing is performed. At this time, the height of the stick is set higher than a desired height. Next, the molding plate 21 is placed on the end of the mold 11. For example, if the length of the molded plate 21 is 2 meters, the form 11
This molded plate 21 is covered from the end to the first two meters. Then, the jigs 10 are attached one by one at an appropriate interval, for example, at an interval of 30 cm. Then, the positioning bolt 26 is tightened to a desired height using a level.

Since the positioning bolts 26 are pressed in order from the end, the excess glue is pushed out to a place where there is no molding plate 21 just like toothpaste. When the glue is hard, a short molded plate 21 may be used. Noro extruded in this way,
Take it out or send it a little further. And the next molded plate 2
1, the jig 10 is attached in the same manner, and the positioning bolt 26 is tightened. This is repeated, and only at the end, the height of the slag is adjusted with the chitin before placing the molded plate 21. Alternatively, the molding plate 21 is covered with the molding plate 21 or lifted up, and the height is adjusted by the positioning bolts 26, and the height is adjusted by adding and removing the stick. When completed, the positioning bolt 26 is tightened.

From the beginning, the height of the slag can be adjusted to the target value. Here, since the slag flows, the top is almost horizontal. On the other hand, the finished shape is not horizontal, such as a water gradient, a chamfer, and a joint design. Therefore, these finished shapes are converted into horizontal shapes having the same volume, and the height of the ready-mixed concrete to be driven is determined. Specifically, first, the raw concrete is driven in, and then roughing is performed. The slime that comes out of the surface is leveled, and the height is adjusted to the target value using a scale and a level. Then, the molded plate 21 is placed, and the positioning bolt 26 is tightened. This is the molding plate 2
1 has a desired finished shape along the lower surface shape. Thereafter, the height is checked again at the upper end of the positioning bolt 26. If there is any deviation, the positioning bolt 26 is loosened, the molded plate 21 is lifted, and the slag is added or removed.

Note that the above procedure is more efficient because the level is not taken in the no-slung state. The height may be adjusted by another procedure. In any case, it is the present invention that the height and shape of the top end are regulated before curing using the jig 10. When the molding plate 21 is completely covered with the mold 11,
Retighten the positioning bolts 26. This is in preparation for the subsequent shrinkage of the concrete.
Is compressed more than this shrinkage. Thereby, until the shape is fixed, the molding plate 21 keeps firmly holding the slag. FIG. 1 shows a jig 1 before this retightening.
The state where only the height of 0 is adjusted is shown. After the concrete is hardened, the molded plate 21 and the presser 22 are removed. The formwork 11 may be left for the sake of the following work.

FIGS. 3 to 6 show a second embodiment.
FIG. 3 shows the presser 42 of the second embodiment,
This corresponds to the presser 22 of the first embodiment. This and the molded plate 21 of the first embodiment constitute a jig of the second embodiment. The holding member 42 includes a horizontal member 43, a leg member 44, a positioning bolt 53, and a slide bush 4.
7 and a pad 54. These members are different from those of the first embodiment only in portions described below. Parts that are not described are the same as those of the first embodiment.

In this embodiment, elongated holes 45 and 46 are formed at the center and both ends of the horizontal member 43. A slide bush 47 is inserted into the central long hole 45,
It is fixed with a nut 48. The same positioning bolt 53 as that of the first embodiment is screwed into the slide bush 47, and the standing position of the positioning bolt 53 can be adjusted by loosening the nut 48 and moving the slide bush 47. By doing so, the degree of freedom of the standing position of the positioning bolt 53 is increased, and it is possible to flexibly cope with the case where the distance from the mold to the single pipe is not equal on the left and right.

A bolt 51 is provided upright on the leg member 44, and the bolt 51 is inserted into the elongated holes 46 at both ends of the horizontal member 43. A nut 52 is screwed into the bolt 51 and the leg member 4
4 is fixed to the horizontal member 43. Loosen this, leg member 4
By sliding 4, the distance between the leg members 44 can be adjusted. By doing so, it is possible to flexibly cope with different widths of the rising wall.

The backing plate 54 is attached to the lower end of the positioning bolt 53 so as to swing freely. FIG. 6 shows a central longitudinal section of these. The lower end of the positioning bolt 53 has a spherical surface, and a screw hole is formed in the center. Here, a cap-shaped holder 55 is abutted, and a screw 56 is inserted from below into a central hole thereof, and screwed into the screw hole. The jaws of the screw 56 are also spherical. The lower part of the flange of the holder 55 is also threaded, and this is screwed into a shallow screw hole formed in the center of the paddle 54. With this, the contact metal 54 is moved with respect to the positioning bolt 53.
You can swing freely and flexibly respond to any inclination of the top.

Note that the procedure of the top-end one-shot finishing using the jig of the second embodiment is the same as that of the first embodiment. Description is omitted.

[0030] The top shape regulating means referred to in the claims means that the top shape becomes a desired shape after concrete hardening.
The lower surface is molded. In addition, the urging means means a means for continuously urging the top end shape regulating means abutting on the top end of the concrete until the concrete is hardened, after the concrete is cast, while it is flexible. . In the embodiment, the molded plate 21 has these two functions.
These may be separate members. For example, the arch member 24
The top end shape regulating means may be biased downward by this elasticity, or the positioning bolt 53
A spring may be interposed between the buckle 27 and the pad 27.

Further, there may be a case where a pipe or the like such as a column is erected on the top end of the rising wall. In this case, a hole having an appropriate margin is formed in the molding plate 21 in advance, and the root of a pipe or the like is inserted into the hole, and the operation of embedding the root in the ready-mixed concrete is covered with the molding plate 21. Perform with the work. Up to now, the work of erecting the pipes and the like has been carried out as post-processing after the concrete has hardened, but this work can also be carried out together. Also, nut 4
8, 52 may be wing nuts or the like.

[0032]

As described above, according to the present invention, the top end shape regulating means whose lower surface is molded so that the top end has a desired shape after hardening of the concrete, and the space between the top and bottom of the concrete which is soft after the concrete is cast. And a biasing means for continuously biasing the top end shape regulating means abutting on the top end to the top end after the concrete is hardened. (Claim 1). Therefore, a single presser as specified can be realized, and a finishing step in the true sense can be omitted. The concrete is also truly integrated, increasing its strength and eliminating flaking.
It does not increase the labor of the formwork carpenter and does not cut the control panel.

Further, if the top end shape regulating means is formed of an elastic member such as rubber or styrene foam, these functions as both the top end shape regulating means and the urging means, and the configuration is simplified. (Claim 2). Further, when the elastic member is made of styrene foam, it can be cut easily, can be easily adjusted on site, and has high working efficiency. The finished surface is beautiful and the material cost is low (Claim 3).

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment.

FIG. 2 is a perspective view showing the configuration of the first embodiment.

FIG. 3 is a front view showing a presser according to a second embodiment.

FIG. 4 is a front view (A) and a plan view (B) showing a horizontal member according to the second embodiment.

FIG. 5 is a plan view (A) showing each member of the second embodiment.
1 to A3) and front views (B1 to B3).

FIG. 6 is a central longitudinal sectional view of a positioning bolt and a backing plate according to a second embodiment.

FIG. 7 is a perspective view showing an example of a method of forming a molded plate.

FIG. 8 is a longitudinal sectional view showing an example of forming a parapet formwork.

FIG. 9 is a longitudinal sectional view showing examples of handrail shapes (A) to (C).

FIG. 10 is a longitudinal sectional view showing an example of how to win by a form carpenter.

FIG. 11 is a perspective view showing a top holding plate shown in Japanese Utility Model Application Laid-Open No. 56-70047.

FIG. 12 is a longitudinal sectional view showing how to hold the top end shown in Japanese Utility Model Application Laid-Open No. 56-70047.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 8 ... Nail 9 ... Crosspiece 10 ... Jig (embodiment example) 11 ... Formwork 12 ... Single tube 13 ... Form tie 21 ... Molding plate 22 ... Holding tool 23 ... Chamfering bar 24 ... Arch member 26 ... Positioning bolt 27 .., A base 28, an arc-shaped portion 29, a foot 42, a presser (second embodiment) 43, a horizontal member 44, a leg member 45, a long hole 46, a long hole 47, a slide bush 48, a nut 51, and a bolt 52 ... Nut 53 ... Positioning bolt 54 ... Pad 55

Claims (3)

[Claims] 1. A top shape regulating means having a lower surface molded so that a top shape becomes a desired shape after hardening of concrete, and abuts on the top while the concrete is cast while it is flexible. A biasing means for continuously biasing the top end shape regulating means toward the top end of the concrete until the concrete hardens. 2. The top-end press-down jig according to claim 1, wherein the top-end shape regulating unit and the urging unit are realized on the same elastic member. 3. The jig of claim 2, wherein the elastic member is styrofoam.