Spacing rod and rotary spacer using the spacing rod

Abstract

To provide a spacing rod and a rotary spacer using the spacing rod, which can prevent distortion as much as possible even during long-term use, extend the life of the rod, and prevent damage to a formwork as much as possible. [Solution] A spacing rod 1 used to degas the inner surface of a form in a concrete formwork molding method has a cylindrical body made of mild steel with a spiral groove 2 formed in it, and the tip 3 is formed in a round shape, and the spiral groove 2 in the cylinder is formed with a right twist from the tip 3 toward the male thread part 4 of the rod located at the rear end.

Description

[Technical Field]

[0001] This invention relates to a tool used for degassing during concrete pouring work, particularly in the production of concrete products using steel forms and the production of concrete structures formed using forms at construction sites. [Background technology]

[0002] Conventionally, methods for degassing and compacting concrete have been used, such as internal vibrators, which insert a vibrating element into the concrete, or formwork vibrators, which apply vibrations from the outside of the formwork. However, due to constraints such as the shape and size of the concrete structure, the above-mentioned vibrators may not be able to effectively degas the surface. A method known as "spacing," in which the concrete is shaken along the inside of the formwork with a spade, has been widely used to effectively remove surface bubbles that cannot be removed by conventional vibratory compaction.

[0003] When fresh concrete is poured into a formwork, it adheres to the inner surface of the formwork, leaving numerous air bubbles behind. Furthermore, when poured fresh concrete is vibrated, it becomes fluid. As a result, relatively large air bubbles inside the formwork migrate upward and disappear, but some may migrate to the formwork walls, further increasing the amount of air bubbles inside the formwork. Air bubbles that adhere to the formwork surface are difficult to move and are difficult to completely remove. In particular, in structures with narrower shapes, the formwork surfaces that contact the concrete slope inward, making air bubble removal extremely difficult. Air bubbles left behind on the formwork surfaces form defects near the concrete surface, reducing the strength and durability of the structure and significantly damaging its aesthetics. Spacing can efficiently remove even the difficult-to-remove air bubbles that have accumulated on the inner surface of the formwork.

[0004] Patent Document 1 discloses a spacing device that uses a spacing rod that is made by spirally winding and fixing a mild steel wire around a metal rod and has a rod-shaped body with a guide part attached to the tip, where Rg is the maximum diameter of the guide part and Ri is the diameter of a right circular cylinder created by the rotation of the spiral iron wire when the rod-shaped body is rotated, such that Rg≦Ri, and that applies a rotational motion using a commercially available electric hand drill or the like to shake up the concrete. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3128673 Summary of the Invention [Problem to be solved by the invention]

[0006] The spacing rod described in Patent Document 1 is made by winding an iron wire made of mild steel (hardness 110HV(10)) spirally around a metal rod and fixing it in place, and attaching a guide part, such as a long hexagonal nut, made of mild steel (hardness 175HV(10)) with the same or slightly higher hardness as the iron wire to the tip, and the diameter of the right circular cylinder created by rotating the iron wire is larger than the maximum diameter of the guide part.

[0007] Since such a spacing rod, which is made by wrapping a mild steel wire around a metal rod, must be rotated while being brought close to the formwork, the iron wire in the area that comes into contact with the formwork, aggregate, etc., is subject to wear, deformation, breakage, etc., and distortion occurs over long periods of use. When the spacing rod becomes distorted, the center of gravity shifts, resulting in a problem of a shortened product lifespan.

[0008] In addition, because a long hexagonal nut is used as the guide, there is a risk that the corners of the hexagonal nut may damage the inner surface of the formwork depending on the angle at which the spacing rod is inserted into the concrete. Furthermore, the rod with iron wire wrapped around it in a spiral shape places a large load on the rotation, making it difficult to drive with an electric motor battery.

[0009] The purpose of this invention is to provide a spacing rod and a rotary spacer using a spacing rod that can minimize distortion even when used for long periods of time, extend its lifespan, and minimize damage to the formwork. [Means for solving the problem]

[0010] The spacing rod according to claim 1 of the present invention is a spacing rod used to degas the inner surface of a form in a concrete formwork molding method, characterized in that it has a cylindrical body made of mild steel with a spiral groove formed in it and a rounded tip.

[0011] The spacing rod according to claim 2 of the present invention is characterized in that, in claim 1, the spiral groove of the cylindrical body is formed with a right twist from the tip end to the rear end.

[0012] The rotary spacer using a spacing rod according to claim 3 of the present invention is a rotary spacer using a spacing rod that is used to degas the inner surface of a form in a concrete form forming method, and is characterized by comprising a spacing rod that is a cylindrical body made of mild steel with a spiral groove formed in it and a rounded tip, an electric motor that rotates the spacing rod, and a jointer that detachably connects the motor and the spacing rod and has a diameter larger than the diameter of the spacing rod.

[0013] The rotary spacer using a spacing rod according to claim 4 of the present invention is characterized in that, in claim 3, the jointer is made of a metal material harder than the mild steel that forms the spacing rod.

[0014] The rotary spacer using a spacing rod according to claim 5 of the present invention is characterized in that in claim 3, the electric motor is driven by a battery.

[0015] The rotary spacer using a spacing rod according to claim 6 of the present invention is characterized in that, in claim 3, it is made of a metal material with the same hardness as the jointer or a higher hardness, and is provided with an adapter having a threaded portion on one side that can be threadedly engaged with the jointer, and a connecting portion shaped to be connected to the electric motor on the other side. [Effects of the Invention]

[0016] The spacing rod according to claim 1 of the present invention is a spacing rod used to degas the inner surface of a form in the concrete formwork molding method, and is made of a mild steel cylindrical body with a spiral groove formed in it and a rounded tip.

[0017] In this way, because the spacing rod is a cylindrical body made of mild steel with a spiral groove cut into it, there is no part that protrudes from the outer surface of the cylinder, and the overall diameter can be made thin. This makes it easy to insert into the narrow space between the formwork and rebar, and it is easy to move parallel to the formwork while it is in contact with the formwork, minimizing damage to the formwork. Furthermore, by forming the tip into a round shape, damage to the inner surface of the formwork by the tip can be minimized.

[0018] In addition, because the grooves in the spacing rod are machined during manufacturing, it is possible to prevent the center of gravity from shifting, and to reduce wobbling during rotation. Furthermore, because the spacing rod has few irregularities, it is possible to reduce the load during rotation. Therefore, it is possible to prevent distortion caused by long-term use as much as possible, and it is possible to extend the life of the spacing rod.

[0019] The spacing rod according to claim 2 of the present invention is the same as claim 1, in that the spiral groove of the cylindrical body is formed with a right twist from the tip end to the rear end.

[0020] Here, most drills are right-hand helical, and most rotary motors, such as electric drills, generally have a clockwise rotation when drilling into a hole. Therefore, if a right-hand helical spacing rod is connected to a rotary motor, such as an electric drill, and used clockwise as in normal use, it will penetrate deep into the fresh concrete in a clockwise direction, and the unhardened fresh concrete will be sent naturally from the tip of the spacing rod to the rear end, efficiently removing air bubbles from the fresh concrete. In other words, just like drills, it can be used smoothly, following the standard usage rules in the tool industry.

[0021] The rotary spacer using a spacing rod according to claim 3 of the present invention is a rotary spacer using a spacing rod that is used to degas the inner surface of a form in a concrete form forming method, and is equipped with a spacing rod that has a cylindrical body made of mild steel with a spiral groove formed in it and a rounded tip, an electric motor that rotates the spacing rod, and a jointer that detachably connects the motor and the spacing rod and has a diameter larger than the diameter of the spacing rod.

[0022] By providing a jointer with a diameter larger than the diameter of the spacing rod, it is light and easy to handle, and because the spacing rod inserted into the opaque fresh concrete is located inside the diameter of the visible jointer, it is possible to perform delicate operations such as lightly placing it against the formwork and moving it parallel to the surface of the formwork while rubbing it against the surface to remove air bubbles that have remained on the surface of the formwork.At the same time, it is possible to avoid giving the formwork a strong impact against the operator's will, and to minimize damage to the formwork.

[0023] A rotary spacer using a spacing rod according to claim 4 of the present invention is the same as claim 3, in which the jointer is made of a metal material harder than the mild steel that forms the spacing rod.

[0024] By using a jointer that is harder than the spacing rod, it is possible to prevent the jointer from being twisted by the rotational drive of the electric motor as much as possible, and therefore it is possible to more reliably transmit the rotational force to the spacing rod.

[0025] The rotary spacer using a spacing rod according to claim 5 of the present invention is the same as claim 3, in which the electric motor is driven by a battery.

[0026] The spacing rod of this invention has a small amount of unevenness, which reduces the load during rotation, so it is possible to minimize the decrease in construction speed, even when using a battery-powered motor, which is prone to losing rotation speed under high load.

[0027] In addition, while battery-powered devices can generally be carried around and used anywhere, they can only be used within the capacity of the battery.However, with the rotary spacer using the spacing rod of this invention, the spacing rod is made small in diameter and lightweight, which minimizes battery consumption, and even with a battery-powered motor, sufficient mixing capacity can be achieved.

[0028] The rotary spacer using a spacing rod according to claim 6 of the present invention is the one according to claim 3, which is formed from a metal material of the same hardness as the jointer or a higher hardness, and is provided with an adapter having a threaded portion on one side that can be threadedly engaged with the jointer, and a connecting portion shaped to be connected to the electric motor on the other side.

[0029] In this way, by providing an adapter with a threaded portion on one side that can be threaded into the jointer and a connection portion shaped to be connected to the electric motor on the other side, it is possible to accommodate a variety of electric motors by changing the adapter. [Brief explanation of the drawings]

[0030] [Figure 1] FIG. 1 is a side view of the spacing rod of the present invention. [Figure 2] FIG. 2 is an exploded view of the rotary spacer of the present invention. [Figure 3] FIG. 3 is a side view of a jointer used in the rotary spacer of the present invention. [Figure 4] FIG. 4 is a side view of the hexagonal adapter used in the rotary spacer of the present invention. [Figure 5] FIG. 5 is a side view of a battery-powered motor. [Figure 6] FIG. 6 is a side view of a long jointer used in the rotary spacer of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0031] The spacing rod and rotary spacer using the spacing rod of this invention are concrete finishing machines used to remove air bubbles from concrete products and their surfaces when manufacturing concrete products using formwork or when manufacturing concrete structures using formwork at construction sites. The spacing rod is used to remove air bubbles that have accumulated in the fresh concrete inside the formwork, producing strong, bubble-free concrete products.

[0032] Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. [Example]

[0033] Spacing Rod 1 and 2, reference numeral 1 denotes a spacing rod of the present invention, which is made of a cylindrical body made of mild steel, for example, carbon steel called S35C with a carbon content of about 0.32 to 0.38%, with a spiral groove 2 formed in it, a rounded tip 3, and a rod male thread 4 formed at the rear end. Only this rod male thread 4 has been hardened by a heat treatment called quenching, and a nut 5 is provided on the groove 2 side of the rod male thread 4.

[0034] The spiral groove 2 of the cylindrical body is formed with a right twist from the tip 3 to the rear end, and because it is formed by cutting with a machine, it is possible to suppress the deviation of the center of gravity and reduce wobble during rotation. Furthermore, because the spacing rod 1 has few irregularities, it is possible to reduce the load during rotation and to prevent as much as possible the occurrence of distortion that occurs with long-term use, thereby achieving a long life for the spacing rod and rotating motor.

[0035] <Rotary spacer using spacing rod> FIG. 2 is an exploded view of the rotary spacer RS ​​of the present invention, which is composed of the spacing rod 1, a jointer 6 shown in FIG. 3 which has a diameter larger than that of the spacing rod, an electric motor 7 shown in FIG. 5 which rotates the spacing rod 1, and an adapter 8 shown in FIG. 4 which has a connecting portion 14 shaped to be connectable to the electric motor 7.

[0036] 3 has a female thread 9 on one side that screws into the male thread 4 of the spacing rod 1, and an adapter female thread 11 on the other side that screws into the male thread 10 of the adapter 8. The jointer 6 is made of chrome-molybdenum steel called SCM435 with a carbon content of 0.33 to 0.38%, and has been heat-treated to have a Rockwell hardness of HRC 48 to 51. Furthermore, a wrench hook 12 for a wrench or other attachment tool is formed on the outer surface of the jointer 6.

[0037] The electric motor 7 in Figure 5 is equipped with an electric motor that is driven by a battery 15, and at least the electric motor rotates the socket 13 clockwise. The spacing rod 1 of the present invention has a small amount of unevenness, which reduces the load during rotation, so even with a battery 15-driven electric motor 7 whose rotation speed tends to drop especially under high load, it is possible to prevent a decrease in construction speed as much as possible.

[0038] Furthermore, while a battery 15-powered device can generally be carried and used anywhere, it can only be used within the capacity of the battery 15. In the Rotary Spacer RS ​​using the spacing rod 1 of the present invention, the spacing rod 1 is made small in diameter and lightweight, thereby minimizing the consumption of the battery 15, and even the motor 7 driven by the battery 15 can demonstrate sufficient stirring capacity.

[0039] The electric motor 7 may be any type that rotates, such as an electric drill or a drill driver that can change the direction of rotation, and may be a corded type that uses a power cord instead of a battery 15-driven type.

[0040] Most drills are right-handed, and most electric motors, such as commercially available electric drills, generally drive the drill into the hole in a clockwise direction. For this reason, a right-handed spacing rod 1 can be connected to a rotary motor 7 of a typical electric drill, and used clockwise in the same way as normal use, i.e., in the same way as a drill, as is standard in the tool industry, allowing for smooth use.

[0041] 4, an adapter male thread portion 10 is provided on one side, and a hexagonal connecting portion 14 that fits into a socket 13 of the electric motor 7 is provided on the other side. This adapter 8 is made of chrome molybdenum steel called SCM435 with a carbon content of 0.33 to 0.38%, and has a Rockwell hardness of HRC 51 to 54 due to heat treatment, and is formed from a metal material with the same hardness as the jointer 6 or a higher hardness.

[0042] When using the Rotary Spacer RS, which uses the spacing rod of this invention, the rod male thread portion 4 of the spacing rod 1 is screwed into the female thread portion 9 of the jointer 6, the adapter male thread portion 10 of the adapter 8 is screwed into the adapter female thread portion 11 of the jointer 6, and the hexagonal connecting portion 14 of the adapter 8 is attached to the socket 13 of the electric motor 7, and preparations for the degassing operation are completed.

[0043] With the above configuration, when degassing fresh concrete, the rod penetrates clockwise toward the back of the fresh concrete, and the unhardened fresh concrete flows naturally from the tip 3 of the spacing rod 1 toward the rear end, i.e., the direction of the rod's male thread 4, allowing the fresh concrete to flow from the back of the formwork toward the surface, thereby efficiently removing air bubbles from the fresh concrete.

[0044] Furthermore, the spacing rod 1 is light and easy to handle, and since the spacing rod 1 inserted into the opaque fresh concrete is located inside the diameter of the visible jointer 6, it is possible to perform delicate operations such as lightly placing it against the formwork and moving it in parallel while rubbing the surface of the formwork to remove air bubbles that have remained on the surface of the formwork, while at the same time avoiding giving the formwork a strong impact against the operator's will, thereby minimizing damage to the formwork.

[0045] Also, if the formwork is large and the spacing rod 1 needs to be extended, a long jointer 16 shown in FIG. 6 can be added between the spacing rod 1 and the jointer 6.

[0046] This long jointer 16 consists of a long jointer receiving part 18 equipped with a female threaded part 17 for the rod into which the male threaded part 4 of the spacing rod 1 screws, a long jointer difference part 20 equipped with a male threaded part 19 for the jointer that screws into the female threaded part 9 of the jointer 6, and a metal cylinder 21 of the desired length that fixes the long jointer difference part 20 and the long jointer receiving part 18 to both ends.

[0047] The long jointer difference part 20 and the long jointer receiving part 18 are made of chrome molybdenum steel called SCM435 with a carbon content of 0.33 to 0.38%, and are heat treated to have a Rockwell hardness of HRC 48 to 51. Furthermore, the outer surfaces of the long jointer difference part 20 and the long jointer receiving part 18 are also formed with wrench hooks 12 for installation tools such as wrenches.

[0048] As described above in detail, the spacing rod 1 according to claim 1 of the present invention is a spacing rod 1 used for degassing the inner surface of a form in a concrete form forming method, and is formed by forming a spiral groove 2 in a cylindrical body made of mild steel and forming a tip 3 in a round shape.

[0049] In this way, because the spacing rod 1 is a cylindrical body made of mild steel with a spiral groove 2 carved into it, there is no part that protrudes from the outer surface of the cylinder, and the overall diameter can be made thin. This makes it easy to insert into the narrow space between the formwork and rebar, and it is easy to move parallel to the formwork while it is in contact with the formwork, minimizing damage to the formwork. Furthermore, by forming the tip 3 into a round shape, damage to the inner surface of the formwork by the tip 3 can be minimized.

[0050] In addition, because the grooves 2 of the spacing rod 1 are machined during manufacturing, it is possible to prevent misalignment of the center of gravity and reduce wobble during rotation. Furthermore, because the spacing rod 1 has few irregularities, it is possible to reduce the load during rotation. Therefore, it is possible to prevent distortion caused by long-term use as much as possible, and it is possible to extend the life of the spacing rod 1 and the rotating motor.

[0051] The spacing rod 1 according to claim 2 of the present invention is the same as claim 1, in which the spiral groove 2 of the cylindrical body is formed with a right twist from the tip 3 to the rear end, i.e., toward the rod male thread portion 4.

[0052] Here, most drills are right-hand helical, and most rotating machines, such as electric drills, generally drill into holes in a clockwise direction. For this reason, if a right-hand helical spacing rod 1 is connected to a rotating motor 7, such as a typical electric drill, and used clockwise as in normal use, it will penetrate deep into the fresh concrete in a clockwise direction, and the unhardened fresh concrete will naturally flow from the tip 3 of the spacing rod 1 toward the rod's male thread 4 at the rear end, efficiently removing air bubbles from the fresh concrete. In other words, like drills, it can be used smoothly, following the standard usage rules of the tool industry.

[0053] The rotary spacer RS ​​using a spacing rod 1 according to claim 3 of the present invention is a rotary spacer RS ​​using a spacing rod 1 that is used to degas the inner surface of a form in a concrete form forming method, and is equipped with a spacing rod 1 that is a cylindrical body made of mild steel with a spiral groove 2 formed in it and a round tip 3, an electric motor 7 that rotates the spacing rod 1, and a jointer 6 that detachably connects the electric motor 7 and the spacing rod 1 and has a diameter larger than that of the spacing rod 1.

[0054] By providing the jointer 6 having a diameter larger than that of the spacing rod 1 in this way, it is light and easy to handle, and since the spacing rod 1 inserted in the opaque fresh concrete is located inside the diameter of the visible jointer 6, it is unlikely to hit the formwork, and damage to the formwork can be prevented as much as possible.

[0055] The rotary spacer RS ​​using the spacing rod 1 according to claim 4 of the present invention is the same as claim 3, in which the jointer 6 is made of a metal material harder than the mild steel that forms the spacing rod 1.

[0056] By using a jointer 6 that is harder than the spacing rod 1, it is possible to prevent the jointer 6 from twisting due to the rotational drive of the electric motor 7 as much as possible, so that the rotational force can be transmitted to the spacing rod 1 more reliably.

[0057] The rotary spacer RS ​​using the spacing rod 1 according to claim 5 of the present invention is the same as claim 3, in which the electric motor 7 is driven by a battery 15.

[0058] The spacing rod 1 of this invention has a small amount of unevenness and can reduce the load during rotation, so it is possible to minimize the decrease in construction speed even with a battery-driven motor 7, which is prone to losing rotation speed especially under high load.

[0059] Furthermore, while a battery 15-powered device can generally be carried and used anywhere, it can only be used within the capacity of the battery 15. In the rotary spacer 1 using the spacing rod 1 of the present invention, the spacing rod can be made small in diameter and lightweight, thereby minimizing the consumption of the battery 15, and even the motor 7 driven by the battery 15 can demonstrate sufficient stirring capacity.

[0060] The rotary spacer RS ​​using the spacing rod 1 according to claim 6 of the present invention is, in claim 3, provided with an adapter 8 formed from a metal material of the same hardness as the jointer 6 or a higher hardness, with one end provided with a threaded portion that can be threadedly engaged with the jointer 6, i.e., an adapter male thread portion 10, and the other end provided with a hexagonal connecting portion 14 that can be connected to the electric motor 7.

[0061] In this way, the adapter 8 has an adapter male thread portion 10 on one side that can be threaded into the jointer 6, and a hexagonal connection portion 14 on the other side that can be connected to the electric motor 7, so that it can be adapted to various electric motors 7 by changing the adapter 8. [Explanation of symbols]

[0062] RS Rotary Spacer 1 Spacing Rod 2 grooves 3 Tip 4 Rod male thread 5 Nut 6 Jointer 7 Electric motor 8 Adapters 9 Female thread 10 Adapter male thread 11 Female thread for adapter 12 Spanner 13 sockets 14 Connection 15 Battery 16 Long Jointer 17 Female thread for rod 18 Long jointer receiving part 19 Jointer male thread 20 Long jointer difference 21 Cylinder

Claims

1. A spacing rod used to degas the inner surface of a form in the concrete formwork molding method. A spacing rod characterized by a cylindrical body made of mild steel with a spiral groove formed in it and a rounded tip.

2. 2. The spacing rod according to claim 1, wherein the spiral groove of the cylindrical body is formed with a right twist from the tip end to the rear end.

3. A rotary spacer using a spacing rod applied to degassing the inner surface of a form in the concrete formwork molding method. a spacing rod having a cylindrical body made of mild steel with a spiral groove formed therein and a rounded tip; an electric motor that rotates the spacing rod; a jointer that detachably connects the motor and the spacing rod and has a diameter larger than that of the spacing rod; A rotary spacer using a spacing rod, characterized by comprising:

4. 4. A rotary spacer using a spacing rod according to claim 3, wherein said jointer is made of a metal material harder than the mild steel forming the spacing rod.

5. 4. A rotary spacer using a spacing rod according to claim 3, wherein said electric motor is driven by a battery.

6. A rotary spacer using a spacing rod as described in claim 3, characterized in that it is formed of a metal material having the same hardness as the jointer or a higher hardness, and is provided with an adapter having a threaded portion on one side that can be threadedly engaged with the jointer and a connection portion shaped to be connected to the electric motor on the other side.

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