A reinforced self-tapping anchor for in-situ repair of building facades

Abstract

The utility model discloses a kind of reinforced self-tapping anchorage devices of building outer wall in situ repair, it is related to the field of fastener technology, it includes anchoring sleeve pipe and anchoring bolt, anchoring sleeve pipe includes expansion section and straight section, expansion section is opened with expansion fissure along length direction, expansion section is equipped with lining boss cover, linear slit is opened with length direction on lining boss cover, support ring is equipped with on the both sides of linear slit, straight section and expansion section outer wall are provided with boss structure along circumference, anchoring bolt outside is equipped with anti-rotation rib, anti-rotation rib is sleeved on anchoring bolt, recess is opened with circumference on anti-rotation rib.The application has the effect of improving the anchoring force of screw.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to an enhanced self-tapping anchor for in-situ repair of building exterior walls. Background Technology

[0002] Currently, in-situ repair of existing building exterior wall systems is a hot research topic. For in-situ repair of cracks and loose insulation layers in existing building exterior walls, existing technologies mostly use ordinary screws for anchoring, or use drilling and expansion bolts for anchoring.

[0003] The relevant technology can be found in Chinese Patent No. CN223062870U, which discloses a screw that is easy to disassemble, including a shank removal mechanism. One end of the shank removal mechanism is engaged with the surface of the screw body. By injecting a water-absorbing solvent through an injection hole after screwing the screw in and sealing it, moisture in the air and some water seeping in by rainwater can be isolated for a certain period of time. This can delay the degree of screw corrosion to a certain extent, extend the service life of the screw, and facilitate screw disassembly and maintenance. Furthermore, the structure that separates the screw body from the shank can minimize the possibility of damage to the screw during the unscrewing process due to shank corrosion.

[0004] Regarding the aforementioned technologies, during the process of a screw passing through an exterior wall or insulation layer, the opening in the exterior wall or insulation layer will enlarge as the screw extends, increasing the distance between the screw and the inner wall of the opening. This reduces the contact area between the screw and the wall, making the screw prone to loosening and hindering the improvement of the screw's anchoring force. Utility Model Content

[0005] To enhance the anchoring force of the device, this application provides an enhanced self-tapping anchor for in-situ repair of building exterior walls.

[0006] This application provides an enhanced self-tapping anchor for in-situ repair of building exterior walls, employing the following technical solution:

[0007] An enhanced self-tapping anchor for in-situ repair of building exterior walls includes an anchor sleeve and an anchor bolt. The anchor sleeve is made of an elastic material, and the anchor bolt includes a self-tapping end and a drive portion. The self-tapping end is fixedly connected to one end of the drive portion. The anchor sleeve includes a straight section and an expansion section. The straight section has a threaded portion adapted to the drive portion. The expansion section has several expansion slits along its length and an inner lining protrusion sleeve. The inner lining protrusion sleeve is arranged along the length of the anchor sleeve and has several linear slots along its own length. The linear slots and expansion slots are staggered. The drive portion is screwed into the expansion section along the threaded portion, causing the expansion section and the inner lining protrusion sleeve to expand.

[0008] By adopting the above technical solution, the operator makes an opening in the outer wall and inserts the anchor sleeve into the opening. By rotating the self-tapping end, the nail is driven into the anchor sleeve along the threaded part. The threaded part guides and limits the nail. The nail passes through the inner lining protrusion sleeve, causing the inner lining protrusion sleeve to crack and expand along the linear gap. The two sides of the linear gap move away from each other. At the same time, the nail pushes the expansion section away from the axis of the anchor sleeve, causing the expansion section to expand. The expansion direction of the expansion section is perpendicular to the expansion direction of the inner lining protrusion sleeve, thus forming a two-way expansion system. This allows the anchor sleeve to fit radially against the inner wall of the outer wall, increasing the friction between the device and the inner wall of the outer wall.

[0009] Optionally, the outer sides of the straight section and the expansion section are provided with several circumferentially arranged protrusions, and the several rings of protrusions are distributed along the axial direction of the anchor sleeve. All the protrusions are inclined towards the self-tapping end.

[0010] By adopting the above technical solution, when the anchor bolt is inserted into the anchor sleeve, the inclined side of the protruding structure contacts the inner wall of the wall, reducing the friction between the anchor sleeve and the inner wall of the cavity, and limiting the displacement of the anchor sleeve towards the self-tapping end, which is conducive to improving the anchoring force between the anchor sleeve and the outer wall.

[0011] Optionally, the protruding structure includes several semi-rings, which are arranged around the outer wall of the expansion section or the straight section, and the side of the semi-ring that is inclined toward the nail insertion part is set as an inclined surface.

[0012] By adopting the above technical solution, when the anchor sleeve enters the wall, the inclined surface slides against the inner wall of the cavity, and the inclined surface guides the movement of the anchor sleeve, improving the convenience of inserting the anchor sleeve into the wall. At the same time, the semi-ring reduces the probability of the anchor sleeve being displaced towards the self-tapping end when the anchor bolt rotates, which is conducive to improving the stability of the anchor sleeve.

[0013] Optionally, the protruding structure includes several fixing blocks, which are arranged circumferentially along the expansion section or the straight section.

[0014] By adopting the above technical solution, when the anchor sleeve is inserted into the inner wall of the wall, there is a gap between adjacent fixing blocks, which accommodates impurities on the inner wall of the cavity, thereby facilitating the fixing blocks to fit against the inner wall of the wall, thus restricting the circumferential rotation of the anchor sleeve and improving the ease of operation of the device.

[0015] Optionally, the expansion section is provided with several anti-rotation ribs along the circumferential direction on the side near the straight section.

[0016] By adopting the above technical solution, when the anchor bolt is inserted into the anchor sleeve, the anti-rotation rib contacts the inner wall of the outer wall, which increases the friction between the anchor and the inner wall of the outer wall. This helps to counteract the torque applied by the anchor to the anchor sleeve and reduces the probability of relative rotation between the anchor sleeve and the outer wall.

[0017] Optionally, the anchor bolt is provided with an anti-rotation rib, which is sleeved on the outside of the anchor bolt and the outer surface of the anti-rotation rib is in contact with the inner wall of the straight section.

[0018] By adopting the above technical solution, the anti-rotation reinforcement supports the anchorage and reduces the friction between the anchorage and the anchorage sleeve, which helps to reduce the probability of the anchorage causing the anchorage sleeve to rotate and improve the anchorage force of the anchorage sleeve.

[0019] Optionally, the anti-rotation rib is provided with a plurality of grooves evenly distributed along the circumference, the grooves are arranged along the length direction of the anti-rotation rib, and a raised strip is formed between adjacent grooves.

[0020] By adopting the above technical solution, the anti-rotation rib contacts the anchor sleeve through the protruding strip, and the contact area between the anti-rotation rib and the anchor sleeve is reduced through the groove, thereby reducing the friction between the anti-rotation rib and the anchor sleeve, and further reducing the probability of the anchor sleeve rotating when the anchor rotates.

[0021] Optionally, the expansion section is fixed with several wave blocks along the side of the expansion crack, and the expansion section is provided with positioning grooves that are adapted to the wave blocks. In the natural state, the wave blocks are inserted into the corresponding positioning grooves.

[0022] By adopting the above technical solution, when the anchor sleeve is inserted into the outer wall, the positioning groove fixes and limits the corrugated block, reducing the probability of the expansion section being misaligned along its own length direction, which is conducive to improving the stability of the anchor sleeve in use.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The operator makes an opening in the exterior wall and inserts the anchor sleeve into the opening. By rotating the self-tapping end, the nail is driven into the anchor sleeve along the threaded part. The threaded part guides and limits the nail. The nail passes through the inner lining protrusion sleeve, causing the inner lining protrusion sleeve to crack and expand along the linear gap. The two sides of the linear gap move away from each other. At the same time, the nail pushes the expansion section away from the axis of the anchor sleeve, causing the expansion section to expand. The expansion direction of the expansion section is perpendicular to the expansion direction of the inner lining protrusion sleeve, thus forming a two-way expansion system. This allows the anchor sleeve to fit radially against the inner wall of the exterior wall, increasing the friction between the device and the inner wall of the exterior wall.

[0025] 2. When the anchor is inserted into the anchor sleeve, the inclined side of the protruding structure contacts the inner wall of the wall, which reduces the friction between the anchor sleeve and the inner wall of the cavity, and limits the displacement of the anchor sleeve towards the self-tapping end, which helps to improve the anchoring force between the anchor sleeve and the outer wall.

[0026] 3. When the anchor sleeve enters the wall, it slides against the inner wall of the cavity through the inclined surface. The inclined surface guides the movement of the anchor sleeve, improving the convenience of inserting the anchor sleeve into the wall. At the same time, the semi-ring reduces the probability of the anchor sleeve being displaced towards the self-tapping end when the anchor rotates, which helps to improve the stability of the anchor sleeve. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0028] Figure 2 This is a cross-sectional schematic diagram of an enhanced self-tapping anchor for in-situ repair of building exterior walls.

[0029] Figure 3 This is a schematic diagram of the inner lining protrusion sleeve.

[0030] Figure 4 This is a schematic diagram of the anchoring sleeve in Example 2.

[0031] Explanation of reference numerals in the attached drawings: 1. Anchor bolt; 11. Insertion part; 12. Self-tapping end; 13. Anti-rotation rib; 131. Groove; 132. Raised strip; 2. Anchor sleeve; 21. Expansion section; 212. Expansion crack; 213. Corrugated block; 214. Positioning groove; 22. Straight section; 23. Semi-ring; 24. Fixing block; 25. Anti-rotation rib; 26. Threaded part; 3. Inner lining raised sleeve; 31. Linear gap; 32. Support ring. Detailed Implementation

[0032] The present application will be further described in detail below with reference to all the accompanying drawings.

[0033] This application discloses an enhanced self-tapping anchor for in-situ repair of building exterior walls.

[0034] Example 1

[0035] Reference Figure 1 and Figure 2An enhanced self-tapping anchor for in-situ repair of building exterior walls includes an anchor sleeve 2 and an anchor bolt 1. The anchor sleeve 2 is made of an elastic material, which can be plastic. The anchor sleeve 2 includes a straight section 22 and an expansion section 21. The expansion section 21 has two expansion slits 212 along its length. The anchor bolt 1 includes a nail insertion part 11 and a self-tapping end 12. The nail insertion part 11 is fixedly connected to the self-tapping end 12. In use, the operator rotates the self-tapping end 12 with a tool to rotate the nail insertion part 11.

[0036] Reference Figure 1 and Figure 2 The end of the nail insertion part 11 away from the self-tapping end 12 is provided with an external thread along the circumference. The self-tapping end 12 can be cross-shaped or plum blossom-shaped. In this embodiment, it is described as cross-shaped. The inside of the straight section 22 is provided with a threaded part 26 that is adapted to the nail insertion part 11 on the side near the expansion section 21. When the nail insertion part 11 is threadedly connected to the threaded part 26, the self-tapping end 12 is rotated to move the nail insertion part 11 along the axial direction.

[0037] Reference Figure 1 and Figure 3 An inner lining protrusion sleeve 3 is placed inside the anchor sleeve 2. The inner lining protrusion sleeve 3 has two parallel linear slits 31 along its length. The linear slits 31 intersect with the expansion cracks 212. Several support rings 32 are arranged on the outer side of the inner lining protrusion sleeve 3 along the axial direction. The support rings 32 are located between the two linear slits 31. When the inner lining protrusion sleeve 3 is installed, the support rings 32 are directly opposite the expansion cracks 212. The linear slits 31 expand the deformable range of the inner lining protrusion sleeve 3.

[0038] Reference Figure 1 and Figure 3 In use, the operator makes an opening in the exterior wall, inserts the anchor sleeve 2 into the wall, aligns the nail insertion part 11 with the middle position of the anchor sleeve 2, and rotates the self-tapping end 12 so that the nail insertion part 11 passes through the straight section 22 and screws into the expansion section 21 along the threaded part 26. The nail insertion part 11 enters the inner lining protrusion sleeve 3 and expands the inner lining protrusion sleeve 3 along the linear gap 31, so that the inner lining protrusion sleeve 3 passes through the expansion crack 212. At the same time, the inner lining protrusion sleeve 3 compresses the expansion section 21, causing the expansion section 21 to expand and make the contact between the expansion section 21 and the wall more compact. The expansion direction of the expansion section 21 is perpendicular to the expansion direction of the inner lining protrusion sleeve 3, thus forming a two-way expansion system with the inner lining protrusion sleeve 3 to enhance the anchoring force of the device, thereby strengthening the stability between the walls and realizing the reinforcement and repair of the wall.

[0039] Reference Figure 1Both the straight section 22 and the expansion section 21 have circumferentially fixed protruding structures on their outer sides. These protruding structures can be several semi-rings 23, evenly arranged along the axial direction of the straight section 22 and the expansion section 21, and all semi-rings 23 are inclined towards the self-tapping end 12. The cross-section of each semi-ring 23 is triangular. The side of the semi-ring 23 facing away from the self-tapping end 12 is an inclined guide surface. When the anchor sleeve 2 is inserted into the wall, the guide surface guides the anchor sleeve 2 to slide along the inner wall of the wall, thereby reducing the friction between the anchor sleeve 2 and the wall, making it easier for the anchor sleeve 2 to embed into the wall and improving the ease of use of the device.

[0040] Reference Figure 2 The apex of the semi-ring 23 facing the self-tapping end 12 contacts the inner wall of the wall, which increases the friction force of the anchor sleeve 2 moving towards the self-tapping end 12, which helps to reduce the probability of the anchor sleeve 2 detaching from the wall and improves the stability of the anchor sleeve 2.

[0041] Reference Figure 1 Multiple anti-rotation ribs 25 are fixed circumferentially on the side of the expansion section 21 near the straight section 22. When the anchor bolt 1 is inserted into the anchor sleeve 2, the anti-rotation ribs 25 contact and fit with the inner wall of the wall to limit and fix the anchor sleeve 2, reduce the probability of the anchor bolt 1 rotating and causing the anchor sleeve 2 to rotate, and help improve the anchoring force of the anchor sleeve 2.

[0042] Reference Figure 1 and Figure 2 An anti-rotation rib 13 is provided on the outer side of the anchor bolt 1. The anti-rotation rib 13 is sleeved on the outer side of the anchor bolt 1 and rotatably connected to the anchor bolt 1. The side of the anti-rotation rib 13 away from the anchor bolt 1 has grooves 131 evenly formed circumferentially. The adjacent grooves 131 form a raised strip 132. When the anchor bolt 1 enters the straight section 22, the side of the raised strip 132 away from the anchor bolt 1 contacts and fits against the inner wall of the straight section 22. At this time, the anti-rotation rib 13 supports the anchor bolt 1 and leaves a gap between the side of the anchor bolt 1 near the self-tapping end 12 and the anchor sleeve 2, reducing the friction between the anchor bolt 1 and the anchor sleeve 2, reducing the probability that the anchor sleeve 2 will rotate when the anchor bolt 1 rotates, and reducing the disturbance to the wall, which is conducive to improving the working stability of the anchor sleeve 2.

[0043] Reference Figure 1 The expansion section 21 is provided with corrugated blocks 213 evenly distributed on both sides of the expansion crack 212, and the expansion section 21 is provided with positioning grooves 214 that are adapted to the corrugated blocks 213. In the initial state, the corrugated blocks 213 are located in the positioning grooves 214 and fit against the positioning grooves 214, which reduces the probability of the expansion section 21 being misaligned along its own length direction when the anchor sleeve 2 is inserted into the wall, and helps to improve the stability of the anchor sleeve 2 in use.

[0044] The implementation principle of the enhanced self-tapping anchor for in-situ repair of building exterior walls in this application embodiment is as follows: the anchor bolt 1 is inserted into the anchor sleeve 2, the inner lining protrusion sleeve 3 protrudes in a direction perpendicular to the expansion crack 212 and passes through the expansion crack 212, and at the same time, the expansion section 21 expands in a direction perpendicular to the expansion crack 212 until the anchor sleeve 2 completely covers the anchor bolt 1. The expansion section 21 and the inner lining protrusion sleeve 3 cooperate to form a double expansion system. The expansion section 21 expands and fills the opening in the wall, thereby increasing the contact area between the anchor sleeve 2 and the wall. The anchor sleeve 2 is in full contact with the inner wall of the cavity, reducing the possibility of the anchor sleeve 2 loosening and improving the anchoring force of the device.

[0045] Example 2

[0046] The difference between this embodiment and embodiment 1 is that the protruding structure consists of several fixed blocks 24.

[0047] Reference Figure 4 Several fixing blocks 24 are evenly arranged around the expansion section 21 and the straight section 22, and are wound around multiple times. In the installed state, the fixing blocks 24 face the nail insertion part 11 (reference). Figure 2 The fixing block 24 is inclined and has a triangular cross-section. There is a gap between adjacent fixing blocks 24, which can accommodate impurities on the inner wall of the wall, thereby reducing the contact between the expansion section 21 and the impurities and affecting the probability of the expansion section 21 expanding. This makes it easier for the fixing block 24 to fit against the inner wall of the wall, thereby limiting the rotation of the anchor sleeve 2 in the circumferential direction and improving the convenience of using the device.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reinforced self-tapping anchor for in-situ repair of building exterior walls, comprising an anchor sleeve (2) and an anchor bolt (1), characterized in that: The anchor sleeve (2) is made of elastic material. The anchor bolt (1) includes a self-tapping end (12) and a nail insertion part (11). The self-tapping end (12) is fixedly connected to one end of the nail insertion part (11). The anchor sleeve (2) includes a straight section (22) and an expansion section (21). The straight section (22) has a threaded part (26) inside that is adapted to the nail insertion part (11). The expansion section (21) has several expansion slits along its length. 212), the expansion section (21) is provided with an inner lining protrusion sleeve (3), the inner lining protrusion sleeve (3) is arranged along the length direction of the anchor sleeve (2), the inner lining protrusion sleeve (3) is provided with a number of linear slits (31) along its own length direction, the linear slits (31) and the expansion cracks (212) are arranged alternately, the nailing part (11) is screwed into the expansion section (21) along the threaded part (26), and the expansion section (21) and the inner lining protrusion sleeve (3) are expanded.

2. The enhanced self-tapping anchor for in-situ repair of building exterior walls according to claim 1, characterized in that: The straight section (22) and the expansion section (21) are provided with several circumferentially arranged protrusions on the outside. The several rings of protrusions are distributed along the axial direction of the anchor sleeve (2), and the protrusions are all inclined towards the self-tapping end (12).

3. The enhanced self-tapping anchor for in-situ repair of building exterior walls according to claim 2, characterized in that: The protruding structure includes several semi-rings (23), which are wrapped around the outer wall of the expansion section (21) or the straight section (22). The side of the semi-ring (23) that is inclined toward the nailing part (11) is set as a guide surface.

4. The enhanced self-tapping anchor for in-situ repair of building exterior walls according to claim 2, characterized in that: The protruding structure includes several fixing blocks (24), which are arranged circumferentially along the expansion section (21) or the straight section (22).

5. The enhanced self-tapping anchor for in-situ repair of building exterior walls according to claim 1, characterized in that: The expansion section (21) is provided with several anti-rotation ribs (25) along the circumferential direction on the side near the straight section (22).

6. The enhanced self-tapping anchor for in-situ repair of building exterior walls according to claim 5, characterized in that: The anchor bolt (1) is provided with an anti-rotation rib (13), which is sleeved on the outside of the anchor bolt (1) and the outer surface of the anti-rotation rib (13) is in contact with the inner wall of the straight section (22).

7. The enhanced self-tapping anchor for in-situ repair of building exterior walls according to claim 6, characterized in that: The anti-rotation rib (13) is provided with a plurality of grooves (131) evenly distributed along the circumference. The grooves (131) are arranged along the length direction of the anti-rotation rib (13), and a raised strip (132) is formed between adjacent grooves (131).

8. The enhanced self-tapping anchor for in-situ repair of building exterior walls according to claim 1, characterized in that: The expansion section (21) is fixed with several wave blocks (213) along the side of the expansion crack (212), and the expansion section (21) is provided with positioning grooves (214) that are adapted to the wave blocks (213). In the natural state, the wave blocks (213) are inserted into the corresponding positioning grooves (214).

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