JPH07158277A - Leveling tool for concrete top end - Google Patents

Abstract

PURPOSE:To quickly and precisely perform a leveling by rotating a core bar lower end locking part is locked by a machine screw, and regulating the height of the machine screw while measuring the level by a measuring point instructing device. CONSTITUTION:A core bar 21 having a locking part 27 for rotating a machine screw 12 is stood on the upper end of the machine screw 12 by locking the lower end locking part 27 by the machine screw 12. The core bar 21 is rotated in this state while measuring the level by a measuring point instructing device. The machine screw 12 is controlled in height by fastening or loosening by the rotation to level a concrete 14. In this measuring point instructing device, the level instructing scale 28 of a bar rotating body 23 rotatably fitted onto the core bar 21 is read. Otherwise, the signal from a laser emitter 33 is read by a receiver 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a top leveling tool used for various types of cast-in-place concrete such as concrete foundations for buildings, floor concrete, and earthen concrete.

[0002]

2. Description of the Related Art Conventionally, in the field casting method of basic concrete, first, after placing concrete in a formwork, a leveler is poured on the top end surface of the basic concrete to make the top end of the entire base concrete uniform. Is being done. At that time, a nail is driven into the top end of the cast concrete, and a leveler is poured to the upper end of the nail as a reference to set the top end level. Then, as a method for obtaining the height of the nail, that is, the top level, as shown in FIG. 7, before the concrete cast in the formwork (1) is completely hardened, the nail (2) is attached to the top surface of the concrete. Strike a ruler (5) with a laser receiver (4) for level measurement on the upper surface of the nail (2), and hold the ruler (5) until the laser receiver (4) points to the correct level. The top end is hit with a hammer (6) and the nail (2) is driven in.

As described above, in the prior art, nails are struck to level the concrete surface that has been placed, but in order to drive the nails, the nails must be solid enough to be held, and It has to be done before the concrete is completely hardened, which has the drawback that the construction time is limited. Especially in summer, the hardening time of concrete is short, so it may be missed. Even if the level is set accurately in this way, especially with short nails, the holding force of concrete is not sufficient, and there is a possibility that the concrete may sink or fall down at an angle and the level may change.

Further, as described above, when leveling, it is necessary to hit the nail so that it will be slightly higher in advance and drive it carefully little by little, and if it is driven too much, it cannot be returned, so drive it to another position again. It has to be redone and there is a problem that construction takes time.

Therefore, as a means for solving such a problem, it has been considered to replace the nail with the above-mentioned nail and screw a screw into a support member embedded in concrete and display the level with this screw. That is, in the case of a screw, even if it is screwed in too much, it may be rotated in the opposite direction, and there is an advantage that it is possible to quickly perform accurate leveling without sinking after adjustment.

[0006]

However, even if the level is adjusted by rotating the screw in this way, as shown in FIG. 7, it is not possible to strike with a hammer while measuring the level with a ruler set up. Since it is not possible to do so, if the level is too high, it is necessary to temporarily set a ruler and take it to the driver, screw in the screw with a certain amount, or loosen it when it gets too much, and do not always work quickly. Will not be possible.

The present invention is to provide a leveling tool in which a level is displayed by a rotating member such as a screw, and the leveling can be easily performed by rotating the display member. It is intended.

[0008]

In order to solve the above-mentioned problems, according to the present invention, there is provided a core rod having a locking portion for rotating a level setting member such as a screw at a lower end thereof, and the core rod is rotated to the core rod. It is characterized in that it is freely fitted and comprises a measurement instruction section for instructing a measurement point from the level measuring instrument or an indicating device provided with the indicator.

In the above, it is conceivable that the rod-shaped rotating body is externally fitted to the core rod and a level display scale visible on the outer surface of the rod-shaped rotating body is displayed as a measuring point indicating device. . Further, as another device of the measuring point indicating device, it is conceivable that a rod-shaped rotating body is externally fitted to the core rod, and a level display scale visible on the outer surface of the rod-shaped rotating body is visible from the level measuring instrument.

Further, in the invention of claim 4 of this application, the height of the rotating body is adjustable by moving the rotating body up and down with respect to the core rod.

The leveling tool of the present invention can be used not only in the case where the level indicating member is a screw but also in the case of other rotating members. In that case, the locking portion at the lower end of the leveling member is rotated. It shall be adapted to the shape of the member.

[0012]

In the core rod, the lower end locking portion is locked to a screw or the like so as to stand upright at the upper end, and in this state, the core rod is rotated while measuring the level with the measuring point indicating device. This rotation adjusts the level by screwing in the screws to adjust the level of the concrete top, and the height of the screws can be adjusted while measuring the level in this way, so quick leveling is possible. .

[0013]

EXAMPLE FIG. 1 shows a state in which level setting screws (12) are installed on the top end surface of cast concrete (14). (11) is a support for supporting the screw (12), which is relatively flexible such as polyurethane foam resin and has a holding force capable of screwing the screw (12) and holding it at that position. is there. Then, at a proper stage after the concrete (14) is cast and before it is completely hardened, the support tool (11) is inserted and installed from above, and then the screw (12) is set.
By rotating the leveler, the level of the top is poured when the leveler is poured. The screw (12) is preferably attached to the support tool (11) in advance, but may be attached after the support tool (11) is installed. However,
If the concrete (14) can hold the screw (12) by being screwed, the support tool (11) does not necessarily have to be used.

Next, the leveling tool of the present invention for leveling by rotating the level setting screw (12) will be described with reference to FIG. In FIG.
(21) is a core rod made of a thin metal rod, and the core rod (21) has a stopper (22) made of a short cylinder.
Is fitted so as to be movable up and down, and a hollow rotary rod (23) having a substantially square cross-section and slightly elongated is fitted on the upper side of the stopper (22) so as to be rotatable and movable up and down. ing. A grip (24) for rotating the core rod (21) is attached to the upper end of the core rod (21). A butterfly bolt (25) is screwed into the stopper (22) from the outside, and the tip of the butterfly bolt (25) is pressed against the core rod (24), so that the stopper (22) is attached to the core rod (21). It can be fixed. Further, below the stopper (22), a retaining ring (26) is provided on the outer periphery of the core rod (21) to prevent the stopper (22) from falling downward.

Reference numeral (27) is a driver pit which can be engaged with the screw (12), and its shaft portion is detachably inserted and attached to the lower end of the core rod (21). ) Is exhausted, it is designed to be replaced and installed. Further, a level scale (28) in the up-down direction is marked at one place on the outer circumference of the rotary rod (23). The level scale (28) has a shape in which the scale is increased upward or downward from the zero point at the substantially central portion in the vertical direction. That is, this FIG.
In the leveling tool (20) of, the scale (28) of the rotating rod (23)
The level is adjusted by visually observing. The level (19) for confirming the verticality of the leveling tool (20) on the surface opposite to the scale (28).
Is attached.

FIG. 3 shows the leveling tool (20) shown in FIG.
The laser receiver (30) of the laser level measuring instrument is attached to the receiver main body (32) on one end face of the attachment tool (31) formed in a U shape when viewed from above. Is fixed, and the tip portion of the holding bolt (33) screwed from the other end surface side of the fitting (31) is pressed against the side surface of the rotary rod (23) to hold the holding bolt (33) and the holding tool. Rotating rod (23) between (31)
Is fixed to the rotating rod (23) integrally. That is, the receiver body (30) is rotatable together with the rotating rod (23) and is vertically movable.

4 and 5 show the laser receiver (3
The leveling method using the leveling tool (20) of FIG. First, as shown in FIG.
With the driver pit (27) at the lower end of the core rod (21) locked to the head of the screw (12) attached in the state as shown in FIG. 2, this leveling tool (20) stands upright. .
The first screw (12) serves as a reference and is preset to the leveler level height. In this state, laser light is emitted from the laser emitting device (33) toward the receiving portion of the receiver main body (32), and the rotary rod (28) is moved up and down so that the level indicator becomes 0 level. At this time, the stopper (22) loosens the wing bolt (25), and the upper end of this stopper (22) is brought into contact with the lower end of the rotary rod (23) in such a state that the levels match. The laser receiver (3
0) is supported at that height. These rotating rods (23)
The stopper (22) and the stopper (22) may be integrally rotatable so that they can rotate relative to each other.

In this way, after the laser receiver (30) is fixed to the position where the height of the laser receiver (30) is 0 level with respect to the reference screw (12), the adjustment is then performed as shown in FIG. Install the leveling tool (20) on the second screw (12) for performing the same as above, and fix the rotating rod (23) so that the level of the laser receiver (30) becomes 0 level. While rotating the core rod (21), the screwing depth of the screw (12) is adjusted, whereby the screw (12) is leveled. As a result, the second screw (12) is connected to the first screw.
It will be adjusted to exactly the same level as the screw (12). In this way, the level of the third and fourth screws is adjusted, and the leveler is poured to the upper end of the screw (12) to construct the top end.

FIG. 6 shows an embodiment in which the laser receiver (30) is not attached and the level is adjusted only by the leveling tool (20) of FIG. 2. In this case, as shown in FIG. Then, while watching the scale (28) of the rotary rod (23) from the level measuring instrument (35), adjust the height of the rotary rod (23) to set the reference screw (12) to 0 level. The height is set so that the screwing depths of the second and third screws (12) are adjusted in the same manner as described above to perform leveling.

[0020]

As described above, according to the leveling tool of the present invention, the level is set by the rotating member such as a screw, and the core rod is installed on the screw head and kept vertical. Since the screwing amount of the level setting rotary member such as a screw can be adjusted, it is not necessary to change the screwing amount of the screw once by holding the screwdriver and adjust while checking the level with the leveling tool installed. The effect is that it can be done quickly and accurately.

Further, since the structure is such that the laser receiver is attached to the core rod having the locking portion such as the driver pit, or the rotary body and the stopper are fitted on the scale, the structure itself is simple and inexpensive. Can be manufactured to
Since the leveling tool itself is a mere rod, it has an effect of being easy to carry.

Further, according to the invention of claim 4 of this application, since the height of the rotating body is adjustable, when the laser receiver is attached to this rotating body, the rotating body is slid up and down, This has the effect of facilitating level matching of the receiver at the initial setting stage of FIG.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view in which a level setting screw is attached to a concrete crown.

FIG. 2 is a perspective view of the leveling tool of the present invention.

FIG. 3 is a perspective view showing a state in which a laser receiver is attached to the leveling tool of FIG.

4 is a perspective view of a main part showing a work situation in which the height of a laser receiver is adjusted according to a reference screw in a leveling work using the leveling tool of FIG. 3. FIG.

5 is a perspective view of a work situation in which another screw is leveled by the leveling tool set in FIG. 4. FIG.

FIG. 6 is a perspective view of a working state of a leveling method using the leveling tool in the state of FIG. 4 without using a laser receiver.

FIG. 7 is a perspective view showing a work situation of a conventional leveling method.

8 is a vertical cross-sectional view of a main part showing a state in which a leveler is poured with the leveled nail of FIG. 7 as a reference.

[Explanation of symbols]

 (12) Screw (14) Basic concrete (20) Leveling tool (21) Core rod (22) Stopper (23) Rotating rod (27) Driver pit (28) Indicator scale (30) Laser receiver

Claims (4)

[Claims] 1. A leveling tool used for rotating a level setting member such as a screw for adjusting a level by a rotating operation, the core rod having a lower end with a locking portion for the level setting member. And a level indicator for the concrete crown, which is rotatably fitted onto the core rod, and further comprises a measurement indicator for indicating the measurement point from the level indicator or an indicator equipped with the indicator. Ingredient 2. A rod-shaped rotating body is externally fitted to the core rod, and a level display scale visible on a level measuring instrument is marked on the outer surface of the rod-shaped rotating body to serve as a measurement point indicating section. The leveling tool for the concrete crown of claim 1. 3. A rotating body is externally fitted to the core rod,
The leveling tool of the concrete crown according to claim 1, wherein a receiver for receiving a signal from the level measuring device is attached to the rotating body. 4. The leveling tool for a concrete crown according to claim 1, wherein the rotating body moves up and down with respect to the core rod to adjust the height.