JP3279788B2 - Screw support for setting concrete top - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention provides a concrete foundation of the building, floor concrete, to a support of the top Tanre bell setting screws which are used in a variety of poured concrete, such as dirt floor concrete.

[0002]

2. Description of the Related Art Conventionally, in the method of cast-in-place of foundation concrete, first, concrete is poured into a formwork, and then a leveler is poured into the top end face to make the top end of the entire foundation concrete uniform. That is being done. At this time, a nail is driven into the top of the cast concrete, and a leveler is poured to the upper end of the nail with reference to the upper end of the nail so that the top level can be set. As a method for determining the height of the nail, that is, the top level, as shown in FIG. 12, before the concrete (7) cast in the form (1) is completely hardened, the nail is attached to the top face. Hit (2) and set up a ruler (5) with a laser receiver (4) for level measurement mounted on the upper surface of the nail (2) until the laser receiver (4) indicates the correct level. The upper end of 5) is hit with a hammer (6) and the nail (2) is driven. After leveling is performed in this manner, the leveler (8) is installed so as to be flush with the upper end surface of the nail (2) as shown in FIG.

[0003]

As described above, in the prior art, a nail is hit on a cast concrete surface to perform leveling. However, in order to drive the nail, it is hardened to such an extent that the nail can be held. It has to be performed in a depressed state and before the concrete is completely hardened, and there is a disadvantage that the construction time is limited. Especially in the summer, the curing time of concrete is short, so the time may be missed. Even if the level is accurately set in this manner, particularly in the case of short nails, the concrete has insufficient holding power and may sink or fall obliquely after the application, and the level may go wrong. Furthermore, as mentioned above, it is necessary to strike the nail a little higher in advance and carefully drive it little by little, and if it is too much, it will not be possible to return it. And there is a problem that the construction takes time.

In view of the above, according to the present invention, instead of the above-described leveling with a nail, leveling with a screw is performed, and the level setting screw can be easily installed, and concrete can be installed. There can perform leveling even after curing, and further, it is an object to provide a support that no level setting titration, bis crazy after setting the level.

[0005]

In order to solve the above-mentioned problems, a support for a level setting screw according to the present invention is provided with a screw screw.
Can be screwed in and holds screwed screws at any height
And a concrete
To be fitted to the top of the reinforcing bars and other rods inside
Characterized in that it has a mounting hole .

The level setting screw support in the invention of claim 2 of the present application is capable of screwing the screw.
And a holding force that can hold screwed screws at any height.
When it is prepared, the poured concrete is completely hardened.
Before being converted, it is inserted into the concrete from above and embedded
From small pieces that are about 9 to 12 mm in diameter
The whole is columnar, and the lower end is cut off diagonally.
The cut-off surface is flat .

[0007] Further, another support for the level setting screw of this application is a small piece having a holding force capable of screwing the screw and holding the screw at an arbitrary height.
The whole is columnar, and the lower end is cut off diagonally.
A support, and a circle is formed on the outer peripheral surface of the support.
A plurality of vertical grooves are formed at circumferential intervals .

Further , another level setting screw support of the present application is provided.
Holder is a hollow pie that can be screwed in from the top end.
And a substantially horizontal flat at the lower end of the hollow pipe.
It is noted that the flat part and the flat part
Sign.

In this case, the material of the hollow pipe is aluminum
It is conceivable to use a metal material such as a memory.

[0010] The support tool of the level setting screw of the present invention is:
It can be used for not only basic concrete but also various types of concrete cast in place such as earth concrete.

[0011]

According to the above arrangement , first, before the cast concrete is completely hardened, the support tool into which the screw has been appropriately screwed is pushed into the top end surface of the concrete, and then installed. In some cases, before the time suitable for constructing the leveler, the level is obtained by adjusting the screwing amount of the screw while checking the level with a level measuring device. Alternatively, a support may be attached to the upper end of the foundation rebar before concrete placement, and the support may be mounted at a height such that the support is substantially flush with the concrete surface, and leveling may be performed similarly after concrete placement. .

The screw is attached to the small piece before embedding it in the concrete, but it may be after the small piece is installed in the concrete.

[0013]

1 shows a support according to the invention for screwing in level setting screws. The support (11) is made of a small piece having a size and length suitable for screwing the screw (12). For example, the support (11) has a diameter of about 9 to 12 mm and a total length of 40.
It is formed to about 50 mm. Any material can be used as long as the screw (12) can be easily screwed in and has an appropriate holding force so that the screw (12) does not easily fall in the screwed state. As a specific example, for example, a foamed polyurethane resin is conceivable. In a trial production by the inventor, an experiment was conducted using such a foamed polyurethane resin, and it was confirmed that such a foamed polyurethane resin was sufficient. This type of foamed polyurethane resin has a certain degree of elasticity, and is usually used as a backup material when filling the joint material of the outer wall as a building material. Can be used.

Further, as shown in FIG. 1, the lower end of the support (11) is cut off obliquely to facilitate its insertion into concrete before hardening, and the flat surface of the cut-off portion (FIG. 1). 13) is formed so as to prevent rotation in the horizontal direction. The screw (12) is
However, as shown in the figure, by screwing the tip so that it is close to the lower end of the support (12), or by using a screw (12) of such a length, the flexible support described above can be obtained. Deflection can be reduced when the tool (11) is embedded, and the embedding operation can be facilitated.

FIG. 2 shows a state in which the support (11) is buried in the foundation concrete (14). As described above, after the concrete (14) is cast, it is suitable before it is completely hardened. At this stage, the support (11) is inserted from above and installed, and then the screw (12) is rotated to level the top when pouring the leveler. The screw (12) is desirably attached to the support (11) in advance, but may be attached after the support (11) is installed. The screw (12) is desirably a flat screw having a flat head so that the level can be easily checked, but may be any screw such as an iron plate screw or a wood screw. At this time, it is desirable to prevent the generation of rust by using a stainless steel or a screw (12) whose surface is coated. Furthermore, the embedding depth of the support (11) is the most stable because the concrete covers the upper surface of the support (11) and slightly covers the base of the screw (12) as shown in FIG. We can support state.

FIG. 3 shows another embodiment of the support (11). In this embodiment, a mounting hole (36) is formed at the lower end of the support (11), and the mounting hole (36) is formed. 36) is fitted to the upper end of the foundation rebar (16) buried in the concrete (14) from above and attached, and after the foundation concrete (14) is cast, the same as above, The level is set. At this time, the support (11) is the top (16) of the concrete (14) to be cast.
And about the same plane. Alternatively, if the screw (12) protrudes sufficiently, the screw (12) may be buried in the concrete (14).

FIG. 4 is a view similar to the support (11) of FIG. 1, in which a plurality of vertical grooves (15) are formed on the outer peripheral surface of the support at intervals in the circumferential direction, and screws (12) are formed. The support (11) is prevented from turning in the horizontal direction during the rotation of.

FIGS. 5 and 6 show a support (11) of the present invention.
In this embodiment, a hollow pipe made of aluminum having a suitable weight is formed, and a hollow (10) is screwed with a screw (12) from the upper end of the pipe. Then, a member having an appropriate inner diameter such that a female screw capable of holding a screw (12) is formed on the inner peripheral surface thereof is used. Of course, a female screw can be formed in advance. The outer periphery of the upper end portion of the hollow portion is outwardly expanded in a trumpet shape (9) so as not to sink downward after installation in the concrete (14). In addition, the lower end
While being crushed in a flat shape, the flat portion is bent substantially horizontally to form a horizontal flat portion (18) for preventing upward floating and downward sinking and falling, and the tip thereof is bent substantially vertically. Therefore, it is a vertical flat portion (19) for preventing rotation and falling in the horizontal direction.

The supporting member (11) of this embodiment is relatively easy to insert even when the concrete (14) is hardened to some extent, and is simple in pipes made of aluminum or the like, as compared with the supporting member (11) shown in FIG. It can be manufactured only by cutting and deforming, and can be manufactured at low cost. Also, the screw (12) can be easily adjusted with a light force by adjusting the screwing amount while screwing it back deeply. In addition, in this support (11),
As shown in FIG. 5, by embedding up to the root of the screw (12), more stable support can be achieved.

Next, a level setting tool for setting the level by rotating the level setting screw (12) will be described with reference to FIG. In FIG. 7, (21)
A core rod made of a small-diameter metal rod, and a stopper (22) made of a short cylinder is fitted on the core rod (21) so as to be vertically movable. On the side, a slightly long hollow rotary rod (23) having a substantially square cross section is externally fitted so as to be rotatable and vertically movable. A grip (24) for rotating the core rod (21) is attached to the upper end of the core rod (21). A wing bolt (25) is screwed into the stopper (22) from the outside,
By pressing the tip against the core rod (24), the stopper (22) can be fixed to the core rod (21). In addition, below the stopper (22), on the outer periphery of the core rod (21), the stopper (22)
A retaining ring (26) is provided to prevent the falling off of the lower part.

A driver pit (27) that can be engaged with the screw (12) has a shaft portion detachably inserted and attached to the lower end of the core rod (21). When) is worn out, it can be replaced and attached. Further, a level mark (28) in the vertical direction is marked at one place on the outer periphery of the rotating rod (23). The level scale (28) has a shape such that the scale is increased upward or downward from a substantially central portion in the vertical direction as a zero point. That is, FIG.
With the leveling tool (20), the scale (28) of the rotating rod (23)
The level is adjusted by visually observing.

FIG. 8 shows the leveling tool (20) of FIG.
A laser receiver (30) of a laser-type level measuring device is attached to the mounting body (31), which is formed in a U-shape when viewed from above, and the receiver body (32) is provided on one end face. Is fixed, and the tip of a holding bolt (33) screwed in from the other end face side of the mounting tool (31) is pressed against the side surface of the rotating rod (23), and the holding bolt (33) and the holding tool are pressed. (31) and between the rotating rod (23)
And is integrally fixed to the rotating rod (23). That is, the receiver main body (30) is rotatable with the rotating rod (23) and is movable up and down.

FIGS. 9 and 10 show a leveling method using the leveling tool (20) of FIG. 5 to which the laser receiver (30) is attached. First, as shown in FIG. 9, the screw (12) attached in the state shown in FIG.
With the driver pit (27) at the lower end of the core rod (21) locked on the head of, this leveling tool (20) stands upright. The first screw (12) serves as a reference and is set in advance to the level of the leveler. In this state, a laser beam is emitted from the laser light emitting device (33) toward the receiving section of the receiver main body (32), and the rotary rod (28) is moved up and down so that the level indication becomes zero level. At this time, with the stopper (22) loosening the wing bolt (25), the upper end of the stopper (22) is brought into contact with the lower end of the rotating rod (23) in a state where the levels match in this manner. Then, the laser receiver (30) is supported at that height by tightening the wing bolt (25).

After the height of the laser receiver (30) is fixed at the zero level with respect to the reference screw (12) in this way, then, as shown in FIG. A leveling device (20) is set on the second screw (12) for performing the above-mentioned operation, and the core rod (21) is rotated so that the level of the laser receiver (30) becomes 0 level. Then, the screwing depth of the screw (12) is adjusted, whereby
Level out this screw (12). As a result, the second screw (12) is adjusted to exactly the same level as the first screw (12). In this way, the third,
The level of the fourth screw is adjusted, and a leveler is poured to the upper end of the screw (12) to construct the top.

FIG. 11 shows an embodiment in which the laser receiver (30) is not attached and the level is adjusted only by the leveling device (20) shown in FIG. 7. In this case, as shown in FIG. Then, while watching the scale (28) of the rotating bar (23) from the level measuring device (35), adjust the height of the rotating bar (23) so that the level is 0 with respect to the reference screw (12). The height is set so as to be as follows, and thereafter, the screwing depths of the second and third screws (12) are adjusted in the same manner as described above, and their levels are set.

[0026]

As described above, according to the support of the present invention, the leveling is performed by adjusting the screwing depth of the screw, and therefore, it differs from the leveling by nailing. Therefore, there is no inconvenience that the nail must be re-punched at another position because the user has entered too deeply, and there is an effect that the level can be easily adjusted.

In particular, according to the present invention, instead of directly screwing the screw into the concrete, a screw is screwed into the concrete, and a supporting member having a holding force is embedded in the concrete, and the screw is screwed into the supporting member. Therefore, the screw can be securely held at that position, and the screwing amount can be accurately adjusted.

Also, unlike nails, there is no inconvenience that the concrete is too soft and falls after adjustment and the accuracy is lost. Further, when driving nails as described above,
In summer and the like, there is a disadvantage that the concrete hardens too quickly and cannot be driven in. However, according to the present invention, it is possible to perform leveling at any time even after the concrete has hardened.

In particular, the support of claim 1 of this application is
Fits the mounting hole formed on the end surface to the upper end of a rod-like material such as a reinforcing bar.
To be worn and mounted, supported by rebar
So there is no danger of falling down
Can be installed with simple work.

According to the second aspect of the present invention, an oblique cut-off is provided.
Since the cut-off surface of the strip is flat, after casting
Is not only easy to embed into concrete,
The flat part prevents rotation in the horizontal direction and turns the screw.
There is no fear of being taken around when letting them go.

[0031] Similarly, in the invention of claim 3, since it forms a longitudinal groove on the outer circumference, there is an advantage of preventing the support during the rotation of the screw is rotated together.

[0032] Also support according to claim 4 and 5 of this application, since it is obtained by machining a pipe such as aluminum, insertion work into concrete very easy, easily inserted even in a cured state to some extent concrete In addition, a flat portion or an expanded portion for preventing a fall or sinking can be formed by simply deforming, and the manufacturing cost is low.

[Brief description of the drawings]

FIG. 1 is a perspective view of a support provided with level setting screws.

FIG. 2 is a longitudinal sectional view of a main part showing a state in which the support of FIG. 1 is embedded in concrete.

FIG. 3 is a longitudinal sectional view of a main part showing a state in which another support tool is buried and installed in concrete.

FIG. 4 is a perspective view of a support tool showing another embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing a state in which a support according to still another embodiment of the present invention is installed on concrete.

FIG. 6 is a perspective view of the support of FIG. 5;

FIG. 7 is a perspective view of a leveling tool for rotating a screw.

FIG. 8 is a perspective view showing a state where a laser receiver is attached to the leveling tool of FIG. 7;

9 is a perspective view of a main part showing a work situation in which the height of the laser receiver is adjusted in accordance with a reference screw in a leveling operation using the leveling tool of FIG. 8;

FIG. 10 is a perspective view of a work situation in which another screw is leveled by the leveling tool set in FIG. 9;

FIG. 11 is a perspective view showing a working state of a leveling method using the leveling tool in the state of FIG. 7 without using a laser receiver.

FIG. 12 is a perspective view showing an operation state of a conventional leveling method.

13 is a longitudinal sectional view of a main part showing a state where a leveler has been poured with reference to the nail whose level has been set in FIG. 12;

[Explanation of symbols](11) Supporting tool (12) Screw (13) Flat part (14) Foundation concrete(15) Flute  (16) Foundation bar (18) Flat part (19) Flat part (36) Mounting hole

Claims (5)

(57) [Claims] 1. A screw capable of screwing in and having a holding force capable of holding the screwed-in screw at an arbitrary height, and a lower end face having a reinforcing bar or other rod-like material in concrete at an upper end.
Support for level setting screw at the top of concrete , having mounting holes for fitting and mounting
Utensils. 2. A screw is capable of being screwed in and has a holding force capable of holding the screwed screw at an arbitrary height, and is inserted from above into the poured concrete before it is completely hardened. Can be embedded ,
In addition, the whole is cylindrical, and its lower end is cut off diagonally.
A leveling screw support for a concrete top, characterized in that the cut-off surface is flat . 3. A support which is made of a small piece capable of screwing in a screw and having a holding force capable of holding the screwed screw at an arbitrary height, having a columnar shape as a whole, and having a lower end cut off obliquely. A support for level setting screws at the top of a concrete, wherein a plurality of vertical grooves are formed at circumferential intervals on an outer peripheral surface of the support. 4. A concrete comprising a hollow pipe into which screws can be screwed in from an upper end, and a substantially horizontal flat part and a vertical flat part are continuously provided at the lower end of the hollow pipe. A support for the top level screw. 5. The support for level setting screws at the top of a concrete according to claim 4, wherein the hollow pipe is made of a metal material such as aluminum.