JP7031866B2 - Level setting member - Google Patents

Description

The present invention relates to a level setting member used for setting the top level of a concrete structure such as a concrete foundation constructed by placing concrete on a reinforcing bar.

Conventionally, in the cast-in-place construction method for concrete foundations, first, reinforcing bars are arranged in the formwork using deformed steel bars, a crown level control tool is attached to this reinforcement, and concrete is used as a mark. To be placed. For example, in Patent Document 1, a crown display member provided with a crown display unit that is vertically movable with respect to a pole attached and fixed to a reinforcing bar, and an arbitrary movement of the crown display member on the pole. A concrete top indicator is disclosed that comprises a fixing means that can be fixed at a position.

This top end display member serves to display the top end position, and has a cylindrical portion that can be freely moved up and down on the outer circumference of the pole and a disk-shaped top end position display that is locked to the lower end of the cylindrical portion. It is provided with a plate and is integrally formed with a synthetic resin. Further, the fixing means serves to fix the top display member at an arbitrary moving position of the pole, and is a nut-shaped metal fitting mounted and fixed on the outer periphery of the small diameter portion formed on the upper end side of the cylindrical portion. It is composed of a thumbscrew screwed into a female screw hole formed so as to penetrate the side wall of the nut-shaped metal fitting.

Then, by screwing in this thumbscrew, the tip of this thumbscrew pushes the side wall of the small diameter portion formed on the upper end side of the cylindrical portion inward and presses it against the pole, whereby the top end display member is designated as the pole. It can be fixed in position.

Japanese Patent No. 5113130

However, in the concrete top display tool described in Patent Document 1, in order to adjust the position of the top display member, the thumbscrew is loosened once, the position of the top display member is adjusted, and the thumbscrew is used again. It needs to be screwed in and fixed. At this time, it is necessary to hold the crown display member with one hand so that it does not move, and to screw in the thumbscrew with the other hand, which will block both hands of the operator.

Therefore, it is an object of the present invention to provide a level setting member that is easy to install and can be easily fixed at an arbitrary position with one hand.

The level setting member of the present invention is a level setting member that is attached to a level setting rod to serve as a marker for the top level, and is a pair of holding portions that hold the side surfaces of the level setting rod and a pair of holding portions. A pair of support rods extending from each of the support rods in a direction away from each other and an annular portion surrounding the pair of holding portions and the pair of support rods by connecting the outer sides of each of the pair of support rods, and elastic toward the pair of holding portions. It has a deformable annular portion.

In the level setting member of the present invention, when the annular portion is elastically deformed by sandwiching it with fingers toward the pair of holding portions, the pair of support rods are pulled outward, and the side surface of the level setting rod is accompanied by this. A pair of sandwiching portions that sandwich the rod spread in a direction away from each other. As a result, the level setting member is separated from the level setting rod, so that the height of the level setting member can be adjusted. On the other hand, when the finger is released from the annular portion and elastically restored, the pair of support rods return to the inside, and the pair of holding portions return to the original state accordingly, so that the side surfaces of the level setting rods hold the pair. It is sandwiched by the portions, and the level setting member is fixed to the level setting rod.

It is desirable that the level setting member of the present invention has a tongue piece extending toward both outer sides of a pair of support rods. As a result, the length from the bar arrangement to the tongue piece of the level setting member can be easily measured by applying the scale on the reinforcement arrangement, or the level setting member can be applied from the concrete placement surface by applying the scale to the concrete placement surface. The length to the tongue piece can be easily measured.

It is desirable that the level setting member of the present invention has a pair of grip portions provided on the outside of the annular portion and on the outside of the divided portion of the pair of holding portions. This makes it possible to easily adjust the height of the level setting member by elastically deforming the pair of grips by sandwiching them with fingers, or by releasing the fingers from the pair of grips to elastically restore them. ..

In the level setting member of the present invention, it is desirable that the pair of gripping portions have a thin-walled portion formed in the central portion of each. As a result, when the pair of gripping portions are elastically deformed by being sandwiched between fingers, the pair of gripping portions are likely to be elastically deformed.

(1) A pair of holding portions that hold the side surfaces of the level setting rod, a pair of support rods that extend in directions away from each of the pair of holding parts, and a pair of supporting rods that are connected to each other on the outside. According to the level setting member having an annular portion that surrounds the pinching portion and the pair of supporting rods and elastically deformable toward the pair of pinching portions, the annular portion is moved toward the pair of pinching portions with a finger. It is easy to install because it is possible to easily adjust the height of the level setting member and set the top level by elastically deforming it by pinching it or releasing it from the annular part to elastically return it. , It is possible to easily fix it in any position with one hand.

(2) The length from the bar arrangement to the tongue piece of the level setting member can be easily measured by applying a scale on the bar arrangement due to the structure having the tongue pieces extending toward both outer sides of the pair of support rods. The thickness of the concrete structure can be easily set by setting the concrete covering thickness, or the length from the concrete casting surface to the tongue piece of the level setting member can be easily measured by applying a scale to the concrete casting surface. It is possible to easily set the concrete.

(3) With a configuration having a pair of grips provided on the outside of the annular portion and outside the divided portions of the pair of grips, the pair of grips can be elastically deformed by being pinched by fingers, or a pair of grips can be gripped. The height of the level setting member can be easily adjusted by releasing the finger from the portion and returning it to elasticity.

(4) Due to the configuration in which a thin-walled portion is formed in the central portion of each of the pair of grip portions, when the pair of grip portions are elastically deformed by being pinched by fingers, the pair of grip portions are easily elastically deformed, resulting in a light force. The height of the level setting member can be easily adjusted with.

It is a perspective view which shows the use state of the crown level control tool in embodiment of this invention. It is a perspective view which looked at the top level control tool of FIG. 1 from another angle. It is a perspective view which looked at the top level control tool of FIG. 1 from another angle. It is a perspective view of the fixing member of FIG. It is a perspective view which looked at the fixing member of FIG. 4 from another angle. It is a side view of the fixing member of FIG. It is a front view of the fixing member of FIG. It is a perspective view of the bar material for level setting. It is a perspective view of a level setting member. It is a top view which shows the state which fixed the level setting member of the level setting bar. It is a top view which shows the state which deformed the level setting member and released the fixing to a level setting bar. It is a perspective view which shows the assembly procedure of the crown level control tool. It is a side view which shows the procedure of fixing a crown level control tool to a bar arrangement. It is a side view which shows the procedure of fixing a crown level control tool to a bar arrangement. It is a side view which shows the procedure of fixing a crown level control tool to a bar arrangement. It is a front view which shows the state of attaching the clip part from the upper part of the lower reinforcing bar. It is a front view which shows the state of attaching the clip part from the upper part of the lower reinforcing bar. It is a front view which shows the state of attaching the clip part from the upper part of the lower reinforcing bar. It is a front view which shows the state which attached the clip part to the lower reinforcing bar of a different outer diameter. It is a perspective view which shows another embodiment of a level setting member. It is a perspective view of the level setting member of FIG. 20 as seen from the back surface side. It is a side view which shows the use example of the level setting member of FIG. It is a side view which shows another use example of the level setting member of FIG.

FIG. 1 is a perspective view showing a usage state of the crown level control tool according to the embodiment of the present invention, and FIGS. 2 and 3 are perspective views of the crown level control tool of FIG. 1 as viewed from different angles.

As shown in FIGS. 1 to 3, in the crown level control tool 1 according to the embodiment of the present invention, ready-mixed concrete is placed on the horizontally arranged bar arrangement R to form a solid foundation or a floor slab (slab). It is a jig and tool used to set the top level when forming concrete structures such as. The reinforcing bar R is formed by crossing the lower reinforcing bar R1 and the upper reinforcing bar R2 extending in the horizontal direction in a cross shape, respectively. The crown level control tool 1 is attached to the intersection of the lower reinforcing bar R1 and the upper reinforcing bar R2 of the reinforcing bar R. As the lower reinforcing bar R1 and the upper reinforcing bar R2, deformed steel bars having uneven protrusions on the surface are generally used.

The crown level control tool 1 is a fixing member 2 attached to the intersection of the lower reinforcing bar R1 and the upper reinforcing bar R2 of the reinforcing bar R, and a level setting rod fixed to the fixing member 2 and used as a marker for the crown level. It is composed of a material 3 and a level setting member 4 attached to the level setting rod 3.

4 is a perspective view of the fixing member 2, FIG. 5 is a perspective view of the fixing member 2 of FIG. 4 from a different angle, FIG. 6 is a side view of the fixing member 2 of FIG. 4, and FIG. 7 is a view of the fixing member 2 of FIG. It is a front view.

As shown in FIGS. 4 to 7, the fixing member 2 is composed of a main body portion 20 formed by processing a steel plate having a thickness of about 2 mm and a clip portion 21 formed by processing a single leaf spring. It is composed. The main body portion 20 and the clip portion 21 are joined and integrated by welding or the like. The main body portion 20 has a support portion 22 that supports the level setting bar 3, and a pair of arm portions 23 that are inserted below the upper reinforcing bar R2 at the intersection of the reinforcing bars R.

The support portion 22 includes a first tongue piece portion 22A in which a part of the main body portion 20 is cut out and folded outward, and a second tongue portion 22A extending downward from the main body portion 20 and further extending in parallel with the first tongue piece portion 22A. It is composed of one part 22B. The second tongue piece portion 22B is formed with a fixing portion 24 to which the lower portion of the level setting rod 3 is fixed. The fixing portion 24 has a through hole 24A formed in the second tongue piece portion 22B and a thickening portion 24B formed around the through hole 24A on the lower surface of the second tongue piece portion 22B. A support hole 25 is formed in the first tongue piece portion 22A through which the level setting rod 3 penetrates and supports the middle portion thereof.

When the pair of arm portions 23 are inserted at positions sandwiching the lower reinforcing bar R1 on the lower side of the upper reinforcing bar R2, the pair of arm portions 23 come into contact with the lower side surface of the upper reinforcing bar R2 from the upper surface of the main body portion 20 to the main body portion. It is extended to a position lowered by 20 thicknesses.

The clip portion 21 extends downward from the pair of leg portions 21A extending downward so as to straddle the lower reinforcing bar R1 and the lower end portion 21B of the pair of leg portions 21A toward the center of the lower reinforcing bar R1 and lower. It has a pair of claw portions 21C with which the tip portion 21D abuts on the lower side surface of the side reinforcing bar R1. The clip portion 21 is attached from the upper part of the lower reinforcing bar R1 of the reinforcing bar R.

FIG. 8 is a perspective view of the level setting bar 3. As shown in FIG. 8, the level setting rod 3 has a columnar elastic main body portion 30 having an outer diameter slightly smaller than the inner diameter of the support hole 25 of the fixing member 2. The upper end portion of the main body portion 30 has a diameter-expanded portion 31 on which a finger is hooked when the main body portion 30 is pulled out. Further, the lower end portion of the main body portion 30 has a fixed portion 32 for fixing to the fixing portion 24 of the fixing member 2.

The fixed portion 32 is composed of a reduced diameter portion 32A having an outer diameter slightly smaller than that of the through hole 24A of the fixing portion 24 of the fixing member 2, and a hooking portion 32B having an outer diameter larger than that of the through hole 24A. The hooking portion 32B has a tapered shape, and after passing through the through hole 24A due to elastic deformation, elastically returns to be hooked on the thickening portion 24B formed around the through hole 24A on the lower surface of the second tongue piece portion 22B. It has become like.

9 is a perspective view of the level setting member 4, FIG. 10 is a plan view showing a state in which the level setting member 4 is fixed to the level setting rod 3, and FIG. 11 is a level setting rod by deforming the level setting member 4. It is a top view which shows the state which the fixation to 3 is released.

As shown in FIG. 9, the level setting member 4 includes a pair of holding portions 40 that sandwich the side surfaces of the level setting rod 3, and a pair of support rods 41 that extend in directions away from each of the pair of holding portions 40. , Each outside of the pair of support rods 41 is connected, and has an annular portion 42 that surrounds the pair of holding portions 40 and the pair of support rods 41, and a pair of grip portions 43 that sandwich the annular portion 42 with fingers.

The pair of sandwiching portions 40 has a shape in which a substantially cylindrical shape is divided into two, and has a concave surface 40A corresponding to the side surface of the columnar main body portion 30 of the level setting rod 3 to be sandwiched. Further, the concave surface 40A of the holding portion 40 is provided with a claw portion 44 that bites into the level setting rod 3 and acts as a non-slip when the level setting rod 3 is sandwiched.

The annular portion 42 is formed in an annular shape by four extending portions extending from the outside of each of the pair of support rods 41 toward the outside of the divided portion 40B of the pair of holding portions 40, and the divided portion 40B of the pair of holding portions 40. It can be elastically deformed toward. The pair of grip portions 43 are provided on the outside of the annular portion 42 and on the outside of the divided portion 40B of the pair of holding portions 40. A thin-walled portion 43A is formed in the central portion of the pair of grip portions 43 so that the annular portion 42 is easily elastically deformed toward the divided portion 40B of the pair of holding portions 40.

In this level setting member 4, as shown in FIG. 11, when the annular portion 42 is elastically deformed in the Y direction toward the pair of holding portions 40, the pair of support rods 41 are pulled outward in the X direction, respectively. Along with this, the pair of holding portions 40 that hold the side surfaces of the level setting rod 3 expand in the X direction away from each other. As a result, the level setting member 4 is separated from the level setting bar 3, so that the height of the level setting member 4 can be adjusted. On the other hand, when the annular portion 42 is elastically restored, the pair of support rods 41 return inward, and the pair of holding portions 40 return to the original state accordingly, so that the level setting rods are as shown in FIG. The side surfaces of the material 3 are sandwiched by a pair of sandwiching portions 40, and the level setting member 4 is fixed to the level setting rod 3.

Next, how to use the top level control tool 1 will be described. 12 is a perspective view showing the assembly procedure of the top level control tool 1, FIGS. 13 to 15 are side views showing the procedure for fixing the top level control tool 1 to the reinforcing bar R, and FIGS. 16 to 18 are the lower side. It is a front view which shows the state which the clip part 21 is attached from the upper part of the reinforcing bar R1.

First, as shown in FIG. 12, the level setting rod 3 to which the level setting member 4 is attached is inserted into the support hole 25 of the first tongue piece portion 22A of the fixing member 2, and the lower end portion of the level setting rod 3 is inserted. The fixed portion 32 of the above is inserted into the through hole 24A of the second tongue piece portion 22B and fixed.

Next, as shown in FIGS. 13 and 14, the pair of arm portions 23 of the crown level control tool 1 are located below the upper reinforcing bar R2 at the intersection of the reinforcing bars R and sandwiching the lower reinforcing bar R1. Each of them is inserted into contact with the lower side surface of the upper reinforcing bar R2, and the clip portion 21 is attached from the upper part of the lower reinforcing bar R1 as shown in FIG.

At this time, as shown in FIG. 16, the lower reinforcing bar R1 contacts the inner side surface of the pair of claw portions 21C of the clip portion 21, and as shown in FIG. 17, the pair of leg portions 21A is expanded outward while being paired. Passes inside the claw portion 21C of. Then, as shown in FIG. 18, it enters the inside of the pair of leg portions 21A, the tip portion 21D of the pair of claw portions 21C abuts on the lower side surface of the lower reinforcing bar R1, and the lower reinforcing bar R1 is the pair. It is fixed to the inside of the leg portion 21A. In this state, even if an upward force is applied to the top level control tool 1, the tip portion 21D of the pair of claw portions 21C of the clip portion 21 is caught by the lower reinforcing bar R1 and does not easily come off. Therefore, in the top level control tool 1, the top level can be stably set by using the level setting bar 3 supported by the support portion 22 as a mark of the top level.

Further, in the top level control tool 1, as shown in FIG. 19, even if the outer diameter of the lower reinforcing bar R1 is slightly different, the pair of claw portions 21C is attached to the lower side surface of the lower reinforcing bar R1. If the outer diameter is abutting, the lower reinforcing bar R1 is fixed to the inside of the pair of leg portions 21A. Therefore, it is not necessary to prepare various types of crown level control tools 1 according to the outer diameter of the lower reinforcing bar R1, and a common crown level control tool 1 is used for the lower reinforcing bars R1 having different outer diameters. be able to. For example, it is possible to use a clip portion 21 common to the names D13 and D16, D16 and D19, and D19 and D22 of the deformed reinforcing bars.

Further, in the top level control tool 1 in the present embodiment, the lower portion of the level setting bar 3 is fixed to the fixing portion 24, and the middle portion thereof is supported by the support hole 25, so that the level is reached when the ready-mixed concrete is placed. The setting rod 3 is prevented from falling or coming off, and the top level can be set more stably.

Further, the crown level control tool 1 in the present embodiment has a pair of holding portions 40 that hold the side surfaces of the level setting bar 3 and a pair of support rods 41 that extend in directions away from each of the pair of holding portions 40. And the annular portion 42 which is connected to the outside of each of the pair of support rods 41 and surrounds the pair of holding portions 40 and the pair of supporting rods 41, and which is elastically deformable toward the pair of holding portions 40. The level setting member 4 has an annular portion 42 that is elastically deformed by being pinched by a finger toward a pair of holding portions 40, or is elastically restored by releasing a finger from the annular portion 42. It is possible to easily adjust the height to set the crown level.

Next, another embodiment of the level setting member will be described. 20 is a perspective view showing another embodiment of the level setting member, FIG. 21 is a perspective view of the level setting member of FIG. 20 as viewed from the back surface side, and FIG. 22 is a side view showing a usage example of the level setting member of FIG. FIG. 23 is a side view showing another usage example of the level setting member of FIG. 20.

The level setting member 4A shown in FIGS. 20 and 21 has a tongue piece 45 projecting so as to be flush with the lower surface of the level setting member 4A described above. The tongue piece 45 is a rectangular shape extending toward both outer sides of the pair of support rods 41. In FIGS. 20 to 23, the same components as those described above are designated by the same reference numerals, and detailed description thereof will be omitted.

In the level setting member 4A having the above configuration, as shown in FIG. 22, when the crown level control tool 1 is attached to the reinforcing bar R to adjust the height of the level setting member 4A, the scale (ruler) 50 is placed on the upper reinforcing bar R2. The length from the upper reinforcing bar R2 to the lower surface of the tongue piece 45 of the level setting member 4A can be easily measured, and the concrete covering thickness can be easily set.

Further, as shown in FIG. 23, the scale 50 is applied to the bottom surface 51 for constructing a concrete structure such as a solid foundation or a floor slab (slab), and the length from the bottom surface 51 to the lower surface of the tongue piece 45 of the level setting member 4A. By measuring, it becomes possible to easily set the thickness of the concrete structure.

The top level control tool of the present invention is useful for setting the top level of concrete structures such as solid foundations and floor slabs (slabs) constructed by placing concrete on horizontally arranged reinforcing bars. ..

1 Top level control tool 2 Fixing member 3 Level setting rod 4, 4A Level setting member 20 Main body 21 Clip 21A Leg 21B Lower end 21C Claw 21D Tip 22 Support 22A 1st tongue piece 22B No. 2 Tongue piece part 23 Arm part 24 Fixed part 24A Through hole 24B Thickening part 25 Support hole 30 Main body part 31 Diameter expansion part 32 Fixed part 32A Reduced diameter part 32B Hooking part 40 Holding part 40A Concave surface 40B Divided part 41 Support rod 42 Circular part 43 Grip part 43A Thin-walled part 44 Claw part 45 Tongue piece R Reinforcing bar R1 Lower reinforcing bar R2 Upper reinforcing bar

Claims (4)

It is a level setting member that is attached to the level setting bar to mark the top level.
A pair of holding portions that hold the side surfaces of the level setting bar, and
A pair of support rods extending from each of the pair of holding portions in a direction away from each other, and a pair of support rods.
A level setting in which the outer sides of each of the pair of support rods are connected to each other and have an annular portion that surrounds the pair of holding portions and the pair of supporting rods, and has an annular portion that can be elastically deformed toward the pair of holding portions. Element. The level setting member according to claim 1, which has a tongue piece extending toward both outer sides of the pair of support rods. The level setting member according to claim 1 or 2, which is outside the annular portion and has a pair of grip portions provided outside the divided portions of the pair of holding portions. The level setting member according to claim 3, wherein the pair of grip portions have a thin-walled portion formed in the central portion thereof.

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