Patent Application
20240279920
The present invention relates to an anchor, and more specifically, to a deployment-type sleeve, an anchor bolt, and a set anchor used in construction to secure fixtures to concrete or reinforced concrete.
Typically, a set anchor includes a bolt, a pipe, a flat washer, a spring washer and a nut.
The set anchor is constructed by drilling a hole in a wall or floor, and then inserting a bolt-fastened pipe into the hole, and hitting the pipe with a punch. The end portion of the pipe expands within the hole due to the hitting, obtaining shock-resistance (withstanding force).
Herein, the bolt is constructed to be exposed to a certain length from the wall or floor, taking into account the thickness of an object to be fixed.
Afterwards, the object to be fixed is placed so that the exposed bolt penetrates a through hole of the object to be fixed, and the nut is coupled to the end of the bolt, thereby completing the construction of the set anchor.
Generally, at construction sites, set anchors are used at a plurality of positions to install a single object to be fixed. Therefore, set anchors must be constructed so that length of the bolts exposed on the wall or floor is constant.
However, with conventional set anchors, it is difficult to configure the exposed length of bolts uniformly considering the thickness of an object to be fixed. Therefore, conventional set anchors have decreased constructability and have limitations in precise construction.
In addition, in the conventional set anchors, the exposed length of the bolts is uneven, so the shape left on the object to be fixed varies depending on the positions thereof after fixing the object to be fixed. Therefore, the aesthetics exhibited after construction are reduced.
Furthermore, the conventional set anchors have the difficulty of having to be re-constructed when holes become wider due to vibration or the like and fastening conditions becomes loose.
In addition, such a conventional set anchor has a structure in which a pipe spreads and is connected to a lower portion of a hole. Therefore, the conventional set anchor has limitations in that the anchor only provides shock-resistance depending on the spreading of the pipe and thus cannot provide sufficient shock-resistance to an object to be fixed.
This conventional anchor set includes, as shown in
Herein, the construction method of the anchor set is as follows.
First, the bolt rod 110 is inserted into the wedge pipe 120, and the bolt rod 110 inserted into the wedge pipe 120 is inserted into an anchor hole. After inserting the bolt rod 110, the bolt rod 110 is brought into contact with an outer end portion of the wedge pipe 120 by using a pipe-shaped tool, and then the tool is struck. Then, as the wedge pipe 120 is inserted inward, the slit part of the wedge pipe 120 is cut by the tapered portion of the bolt rod 110, so that the diameter of the wedge pipe 120 expands. The expanded wedge pipe 120 is fixed to the anchor hole, and accordingly, the bolt rod 110 is also fixed to the anchor hole together with the wedge pipe 120.
When the bolt rod 110 is fixed to a structure through this operation, various objects to be fixed may be fixed by fixing a bracket or the like to the screw portion of the bolt rod 110.
When fixing the anchor set described above to a structure, it is possible to fix the anchor set by bringing a tool in the form of a pipe into contact with the outer end portion of the wedge pipe 120 and then striking the tool so that an inner end portion of the wedge pipe 120 is opened by the tapered portion of the bolt rod 110. However, since the inner end portion of the wedge pipe 120 is fixed to the anchor hole, fixing force is weak, causing the inconvenience of having to use a separate pipe-shaped tool.
The object of the present invention is to provide a deployment-type sleeve, which is formed to have concavo-convex protrusions formed on an inner wall so as to surround an anchor bolt and is deployed towards a concrete structure by a pressing head of the anchor bolt, so that the deployment-type sleeve can be embedded in and fixed to a side surface area of an installation hole of the concrete structure by applying external force or fastening a nut, without using a pipe-shaped tool.
Another object of the present invention is to provide an anchor bolt, which has a screw portion so as to be tightened and fastened by a nut, is surrounded by concavo-convex protrusions formed on an inner wall of a deployment-type sleeve, which has length and outer diameter corresponding to depth and diameter of an installation hole drilled in a concrete structure, and presses and expands the deployment-type sleeve with a pressing head when external force is applied or the nut is fastened, thereby embedding and fixing the deployment-type sleeve in a side surface of the installation hole.
A further object of the present invention is to provide a set anchor, which has a screw portion so as to be tightened and fastened by a nut, is surrounded by concavo-convex protrusions formed on an inner wall of a deployment-type sleeve, which has length and outer diameter corresponding to depth and diameter of an installation hole drilled in a concrete structure, and presses and expands the deployment-type sleeve with a pressing head when external force is applied or the nut is fastened while fastening an object to be fixed to the ground or the concrete structure, thereby embedding and fixing the deployment-type sleeve in a side surface of the installation hole.
A deployment-type sleeve is provided with an outer wall and an inner wall having length and outer diameter corresponding to depth and diameter of an installation hole drilled in a concrete structure, wherein concavo-convex protrusions are formed on the inner wall in the lengthwise direction of an anchor bolt so as to surround the anchor bolt, so that the deployment-type sleeve is deployed towards the concrete structure by a pressing head of the anchor bolt and is embedded in and fixed to a side surface area of an installation hole of the concrete structure by applying external force or fastening a nut.
The outer diameter of the inner wall has a size of 12 mm to 14 mm, the concavo-convex protrusions has a thickness of 25 mm to 30 mm, the outer wall comes into close contact with the installation hole so as to be fixed to the installation hole, the inner wall has stepped portions and a front end expansion groove respectively formed at upper and lower ends thereof, and a middle expansion groove may be formed between the stepped portions and the front end expansion groove.
According to the present invention, an anchor bolt has a screw portion formed at an upper portion so as to be tightened and fastened by a nut, is surrounded by concavo-convex protrusions formed on an inner wall of a deployment-type sleeve, which has length and outer diameter corresponding to depth and diameter of an installation hole drilled in a concrete structure, and presses and expands the deployment-type sleeve with a pressing head when external force is applied or the nut is fastened, thereby embedding and fixing the deployment-type sleeve in a side surface area of the installation hole.
A nailing portion is formed on an upper end of the screw portion so as to be nailed by a nailing tool, the pressing head is inserted so as to maintain a space between the front end expansion groove of the deployment-type sleeve and the pressing head and has an outer surface provided with an upward inclination protrusion that protrudes and inclines upwards and a downward inclination protrusion that protrudes and inclines downwards from one end of the upward inclination protrusion, so that a front end reaches a lower end of the installation hole, while pressing and expanding a lower end of the deployment-type sleeve so that the shape of the space is distorted, and a pressing protrusion extends vertically from a pressing head side and inclines upwards from a screw portion side so as to be formed with an outer diameter equal to an outer diameter of the pressing head between the screw portion and the pressing head, so that the pressing protrusion comes into close contact with and is inserted into a middle expansion groove, thereby pressing and expanding the deployment-type sleeve when the pressing head moves in an installation hole direction by external force, and being caught on an inclination surface of the middle expansion groove and preventing the pressing protrusion from deviating upwards from the middle expansion groove when tightening the nut.
According to the present invention, a set anchor includes a deployment-type sleeve, which is provided with an outer wall and an inner wall having length and outer diameter corresponding to depth and diameter of an installation hole drilled in a concrete structure, wherein concavo-convex protrusions are formed on the inner wall in the lengthwise direction of an anchor bolt so as to surround the anchor bolt, so that the deployment-type sleeve is deployed towards the concrete structure and is embedded in and fixed to a side surface area of the installation hole by applying external force or fastening a nut, and a bolt, which has a screw portion formed at an upper portion so as to be tightened and fastened by the nut, is surrounded by the concavo-convex protrusions, and presses and expands the deployment-type sleeve with a pressing head when external force is applied or the nut is fastened, thereby fixing the deployment-type sleeve in the side surface area of the installation hole.
In the present invention, the deployment-type sleeve having an outer diameter of 13 mm is provided with the concavo-convex protrusions formed on the inner wall in the lengthwise direction of the anchor bolt so as to surround the anchor bolt, so that the deployment-type sleeve is deployed by the pressing head of the anchor bolt. The anchor bolt is pulled out when struck with a nailing tool such as a hammer or when a nut is tightened, wherein the deployment-type sleeve expands with a short movement of the anchor bolt so as to be firmly secured at a deeper position. In the shape of the deployment-type sleeve, without hitting, even if inner and outer parts of the deployment-type sleeve match an outer end of a perforation or fall inside the perforation, the deployment-type sleeve expands and is firmly secured at a deeper position by tightening a nut, due to a head inclination surface of the anchor bolt and short moving distance of the deployment-type sleeve pulled by the anchor bolt.
In the present invention, the pressing head of the anchor bolt, the side wall of the deployment-type sleeve, and the inner wall of the installation hole are pressed against each other and brought into close contact with each other, so that the anchor bolt is fixed inside the hole.
Owing to the deployment-type sleeve structure that corresponds to the cross-sectional shape of the installation hole of a structure, the separation distance between the installation hole and the deployment-type sleeve is minimized and shaking or vibration of the deployment-type sleeve is suppressed, thereby ensuring more stable, sturdy and precise Installation.
According to the present invention, in a deployment-type sleeve, an anchor bolt, and a set anchor, the anchor bolt has a screw portion formed at an upper portion so as to be tightened and fastened by a nut, is surrounded by concavo-convex protrusions formed on an inner wall of the deployment-type sleeve, which has length and outer diameter corresponding to depth and diameter of an installation hole drilled in a concrete structure, and presses and expands the deployment-type sleeve with a pressing head when external force is applied or the nut is fastened, thereby embedding and fixing the deployment-type sleeve in a side surface area of the installation hole. A nailing portion is formed on an upper end of the screw portion so as to be nailed by a nailing tool, the pressing head is inserted so as to maintain a space between a front end expansion groove of the deployment-type sleeve and the pressing head and has an outer surface provided with an upward inclination protrusion that protrudes and inclines upwards and a downward inclination protrusion that protrudes and inclines downwards from one end of the upward inclination protrusion, so that a front end reaches a lower end of the installation hole, while pressing and expanding a lower end of the deployment-type sleeve so that the shape of the space is distorted, and a pressing protrusion extends vertically from a pressing head side and inclines upwards from a screw portion side so as to be formed with an outer diameter equal to an outer diameter of the pressing head between the screw portion and the pressing head, so that the pressing protrusion comes into close contact with and is inserted into a middle expansion groove, thereby pressing and expanding the deployment-type sleeve when the pressing head moves in an installation hole direction by external force and being caught on an inclination surface of the middle expansion groove and preventing the pressing protrusion from deviating upwards from the middle expansion groove when tightening the nut.
Hereinafter, a tight-lock set anchor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
The tight-lock set anchor according to an embodiment of the present invention includes a deployment-type sleeve 100 and an anchor bolt 600.
The deployment-type sleeve 100 includes an outer wall 500 and an inner wall 200 with length and outer diameter (13 mm) corresponding to (matching) depth and diameter of an installation hole 20 drilled in a concrete structure 10, wherein concavo-convex protrusions 205 are formed with a thickness (2.75 mm) on the inner wall 200 in the lengthwise direction of the anchor bolt 600 so as to surround the bolt 600, so that the deployment-type sleeve is deployed towards the concrete structure 10 by a pressing head 700 of the anchor bolt 600 and is embedded in and fixed to a side surface area of the installation hole 20 by applying external force or fastening a nut.
The outer wall 500 comes into close contact with the installation hole 20 so as to be fixed to the installation hole 20, the inner wall 200 has stepped portions 220 and a front end expansion groove 210 respectively formed at upper and lower ends of the inner wall 200, and a middle expansion groove 230 is formed between the stepped portions 220 and the front end expansion groove 210.
The anchor bolt 600 has a screw portion 900 formed at an upper portion so as to be tightened and fastened by a nut 1000, is surrounded by the concavo-convex protrusions 205 formed on the inner wall 200 of the deployment-type sleeve 100, which has the length and outer diameter (13 mm) corresponding to the depth and diameter of the installation hole 20 drilled in the concrete structure 10, and presses and expands the deployment-type sleeve 100 with the pressing head 700 when external force is applied or the nut is fastened, thereby embedding and fixing the deployment-type sleeve 100 in the side surface area of the installation hole 20.
A nailing portion 950 is formed on an upper end of the screw portion 900. The pressing head 700 is inserted so as to maintain a space 218 between the front end expansion groove 210 of the deployment-type sleeve 100 and the pressing head 700, and has an outer surface provided with an upward inclination protrusion 710 that protrudes and inclines upwards at an angle of 110° to 120° and a downward inclination protrusion 720 that protrudes and inclines downwards at an angle of 110° to 120° from one end of the upward inclination protrusion 710. Therefore, a front end reaches a lower end of the installation hole 20, while pressing and expanding a lower end of the deployment-type sleeve 100 so that the shape of the space 218 is distorted, that is, groove shape of the front end expansion groove portion 210 is changed from a diamond shape to a shape corresponding to the upward and downward inclination protrusions 710, 720 of the pressing head 700.
A pressing protrusion 800 extends vertically from a pressing head 700 side and inclines upwards from a screw portion 900 side so as to be formed with an outer diameter equal to an outer diameter of the pressing head 700 between the screw portion 900 and the pressing head 700, so that the pressing protrusion 800 comes into close contact with and is inserted into a middle expansion groove 300, thereby pressing and expanding the deployment-type sleeve 100 when the pressing head 700 moves in an installation hole 20 direction by external force, and being caught on an inclination surface 232 of the middle expansion groove 230 and preventing the pressing protrusion 800 from deviating upwards from the middle expansion groove 230 when tightening the nut.
The operation of constructing the set anchor according to the present invention in a concrete structure is explained with reference to
Referring to
In a state, in which the pressing head 700 and the pressing protrusion 800 of the bolt 600 are respectively inserted into the front end expansion groove portion 210 and the middle expansion groove 230 of the deployment-type sleeve 100, if the bolt 600 is inserted until the lower end of the deployment-type sleeve 100 comes into contact with the lower end of the installation hole 20, a space (separation distance) 50 is formed between the concrete structure 10, the front end of the bolt 100 and the inner wall of the deployment-type sleeve 100.
Referring to
In order to fix the object to be fixed to the concrete structure 10, the installation hole 20 is drilled in the concrete structure 10 by using a drill (not shown).
In the state, in which the pressing head 700 and the pressing protrusion 800 of the bolt 600 are respectively inserted into the front end expansion groove portion 210 and the middle expansion groove 230 of the deployment-type sleeve 100,
By external force (hitting), the pressing protrusion 800 presses (downwards) a middle part of the deployment-type sleeve 100, so that the middle part of the inner wall 200 of the deployment-type sleeve 100 expands (and binding force between the bolt 600, the deployment-type sleeve 100 and the concrete structure 100 is increased, thereby bringing the bolt 600, the deployment-type sleeve 100 and the concrete structure 100 into close contact with each other so as to be fixed to each other). At the same time, the front end of the pressing protrusion 700 reaches the lower end of the installation hole 20, while the pressing head 700 presses and expands the lower end of the deployment-type sleeve 100 so that the shape of the space 218 is distorted, that is, the groove shape of the front end expansion groove portion 210 is changed from a diamond shape to a shape corresponding to the upward and downward inclination protrusions 710, 720 of the pressing head 700.
Then, referring to
Meanwhile, the detailed description and the accompanying drawings of the present invention describe specific embodiments, but the present invention is not limited to the disclosed embodiments, and various substitutions, modifications and changes can be made within the scope of the technical idea of the present invention by those skilled in the technical field to which the present invention belongs. Therefore, the scope of the present invention should not be limited to the described embodiments and should be construed to include the claims described below and the equivalents to the claims.
As described above, by providing the deployment-type sleeve, the anchor bolt, and the set anchor according to the present invention, owing to the deployment-type sleeve structure that corresponds to the cross-sectional shape of the installation hole of the structure, the separation distance between the installation hole and the deployment-type sleeve is minimized and the shaking or vibration of the deployment-type sleeve is suppressed. Therefore, more stable, robust and precise installation can be implemented and very high industrial applicability can be provided.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2021-0078552 | Jun 2021 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2022/008537 | 6/16/2022 | WO |
