Reinforced anchoring nail

Abstract

The utility model discloses a reinforced anchoring nail, belongs to the technical field of external wall anchoring nails, and aims to overcome the defect that the anchoring force of an existing anchoring nail is low when an external wall is repaired. A plurality of U-shaped holes are formed in the lower portion of the pipe wall of the outer expansion pipe to form expansion parts, protrusions are arranged on the inner sides of the expansion parts so that the expansion parts can be opened towards the two sides at the same time when the inner expansion nail moves to the second position from the first position, and the anchoring force between the outer expansion pipe and an outer wall hole is greatly increased. And the anchoring force of the anchoring nail can be greatly increased after glue injection.

Description

Technical Field

[0001] The utility model belongs to the technical field of external wall anchor nails and relates to a reinforced anchor nail. Background Art

[0002] In recent years, with the increase in the service life of many buildings, the impact of adverse climatic conditions and untimely maintenance, financial losses and even casualties caused by damage and falling off of the facades of buildings in old communities have occurred frequently, constantly irritating people's nerves, and the safety issues caused by the facades of buildings in old communities have become increasingly prominent.

[0003] The thin layer in-situ reinforcement technology of the wall is an important technology for the repair of the exterior wall peeling. It is a safe, ecological and no-removal repair technology that uses nails, nets, glue, grouting materials and other materials and processes. It can effectively repair the wall surface where the tiles have fallen off and the wall surface where the paint has fallen off. In this repair technology, the anchor nails need to have a large anchoring force, and the anchor nail structure design needs to have grouting and mechanical anchoring functions.

[0004] Chinese patent literature discloses a utility model patent for an improved anchor nail for point and surface reinforcement and repair of ceramic tile surfaces, with the authorization announcement number CN208534936 U. It includes an outer expansion tube and an inner expansion nail. The outer expansion tube is sleeved on the inner expansion nail. The first end of the outer expansion tube is a glue injection hole and is in a bell-shaped shape. The second end of the outer expansion tube is in a constricted shape and is cut into two symmetrical halves along the axial direction. A number of glue outlet holes are provided on the tube wall of the outer expansion tube. Although this patented technology can improve the anchoring force of the anchor nail, when the second end of the outer expansion tube is contracted and then expanded by the inner expansion nail, the expansion range is not large and the expanded part and the anchor are basically pulled outward in the same direction, resulting in limited improvement in the friction between the outer expansion tube and the outer wall hole, which urgently needs to be further improved. Summary of the invention

[0005] The utility model proposes a reinforced anchor nail in view of the problems existing in the prior art, aiming to overcome the defect of low anchoring force of the anchor nail during the existing exterior wall repair.

[0006] The utility model is achieved in this way:

[0007] A reinforced anchor nail, characterized in that it includes an outer expansion tube and an inner expansion nail, the upper part of the outer expansion tube is provided with an upper anchoring structure, the lower tube wall of the outer expansion tube is provided with at least a pair of U-shaped holes to form an expansion portion, the inner side of the expansion portion is provided with a protrusion, and when the inner expansion nail is embedded between the paired protrusions, the expansion portion protrudes from the outer wall of the outer expansion tube.

[0008] The outer expansion tube is sleeved on the inner expansion nail, and the inner expansion nail has a first position and a second position, so that when the inner expansion nail is in the first position, the outer wall of the expansion portion is flush with the outer wall of the outer expansion tube, and when the inner expansion nail is in the second position, the expansion portion protrudes from the outer wall of the outer expansion tube;

[0009] The U-shaped hole is a positive U-shape or an inverted U-shape.

[0010] The upper anchoring structure includes a glue injection port located at the upper end of the outer expansion tube and a plurality of glue outlet holes located on the upper tube wall of the outer expansion tube. The upper part of the outer expansion tube is provided with a reduced diameter port to prevent the inner expansion nail from falling out from the first end after being installed.

[0011] The upper end of the external expansion tube has a folded edge portion bent toward both sides, or the upper end of the external expansion tube has a trumpet-shaped outward expansion portion.

[0012] The anchoring nail comprises a tail plate, the outer expansion tube passes through the tail plate, and the folded edge portion abuts against the tail plate.

[0013] An insert hole is provided on the tail plate in an area outside the folded edge portion, and the anchor nail also includes two U-shaped fixing parts, and the fixing parts include an upper plate body, a lower plate body and a connecting part connecting the upper plate body and the lower plate body, the upper plate body is arranged on the upper surface of the folded edge portion, and the lower plate body is arranged on the lower surface of the tail plate, and the connecting part passes through the insert hole.

[0014] At least two pairs of U-shaped holes are provided on the lower tube wall of the outer expansion tube to form an expansion portion, the lowest U-shaped hole is a regular U-shape, and the rest are inverted U-shapes; or the lowest U-shaped hole is an inverted U-shape, and the rest are regular U-shapes.

[0015] The upper anchoring structure includes at least two elongated holes on the upper tube wall of the outer expansion tube. An expansion tube is arranged inside the outer expansion tube, so that when a screw is screwed into the expansion tube, the expansion tube protrudes from the elongated holes of the outer expansion tube.

[0016] The upper end of the external expansion tube is provided with a reduced diameter portion or the upper end of the external expansion tube is provided with an inwardly folded portion bent inwardly.

[0017] The wall of the external expansion tube is provided with a gap which penetrates vertically.

[0018] The upper anchoring structure is an outer expansion tube with two pairs of U-shaped holes on its upper wall to form four expansion parts; the inner side of the expansion part is provided with protrusions, and the inner expansion nails are simultaneously embedded between each team of protrusions so that all the expansion parts protrude from the outer wall of the outer expansion tube.

[0019] The utility model has the following beneficial effects:

[0020] (1) For the anchor nails of the glue injection and mechanical anchoring connection process, multiple U-shaped holes are set at the lower part of the tube wall of the outer expansion tube to form an expansion part, and a protrusion is set on the inner side of the expansion part so that when the inner expansion nail moves from the first position to the second position, the multiple expansion parts can be opened to both sides at the same time, which greatly increases the anchoring force between the outer expansion tube and the outer wall hole. After the glue injection, the anchoring force of the anchor nail can be greatly increased.

[0021] (2) When the U-shaped hole is an inverted U-shape, the expanded portion protrudes outward to form a barb-like structure, which further improves the anchoring force of the anchor nail.

[0022] (3) By providing a plug hole and a U-shaped fixing member on the tail plate, the upper plate of the fixing member is arranged on the upper surface of the folded edge portion, and the lower plate is arranged on the lower surface of the tail plate, so that the connection between the tail plate and the external expansion pipe is more firmly established.

[0023] (4) An expansion tube is further arranged inside the outer expansion tube. After the expansion tube is screwed in and expanded, it forms a double anchoring structure together with the expanded part, and the anchoring force of the anchor nail can be greatly increased.

[0024] (5) By providing a reduced diameter opening or an inwardly folded portion at the first end of the outer expansion tube, the connection between the expansion tube and the outer expansion tube is made more secure, the anchoring force of the expansion screw and the anchoring force of the outer expansion tube can be better combined, and the anchoring force of the anchor nail can be greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the first angle structure of the anchoring nail in Example 1;

[0026] Figure 2 This is a schematic diagram of the second angle structure of the anchor nail in Example 1;

[0027] Figure 3 It is a schematic cross-sectional structural diagram of the anchor nail when the inner expansion nail is in the first position in Example 1;

[0028] Figure 4 It is a schematic cross-sectional structural diagram of the anchoring nail when the inner expansion nail is in the second position in the first embodiment;

[0029] Figure 5 It is a schematic cross-sectional structural diagram of the external expansion tube of Example 1;

[0030] Figure 6 This is a schematic diagram of the structure of the anchor nail of Example 2;

[0031] Figure 7 It is a schematic cross-sectional structural diagram of the anchor nail when the inner expansion nail is in the first position according to the second embodiment;

[0032] Figure 8 It is a schematic cross-sectional structural diagram of the anchor nail when the inner expansion nail is in the second position according to the second embodiment;

[0033] Fig. 9 This is a schematic diagram of the structure of the anchor nail of Example 3;

[0034] Fig.10 It is a partial structural cross-sectional view of the anchoring nail of Example 3;

[0035] Fig.11 This is a schematic diagram of the first angle structure of the anchoring nail of Example 4;

[0036] Fig.12 This is a schematic diagram of the second angle structure of the anchoring nail of Example 4;

[0037] Fig.13 This is a schematic diagram of the cross-sectional structure of the anchoring nail in Example 5;

[0038] Fig.14 This is a schematic diagram of the structure of the external expansion tube of Example 5;

[0039] Fig.15 is a schematic cross-sectional structural diagram of an anchoring nail of Example 6;

[0040] Fig.16 for Fig.15 A magnified view of the part A in the middle;

[0041] Fig.17 It is a partial structural cross-sectional view of the anchoring nail of Example 7;

[0042] Fig.18 It is a partial structural cross-sectional view of the anchoring nail of Example 8;

[0043] Fig.19 This is a schematic diagram of the structure of the outer expansion tube of Embodiment 9;

[0044] Fig. 20 It is a schematic cross-sectional structure diagram of the outer expansion tube of Example 9.

[0045] Explanation of the accompanying drawings: 100, external expansion tube; 120, U-shaped hole; 130, expansion part; 131, protrusion; 140, glue injection port; 141, reduction port; 150, glue outlet hole; 160, gap; 171, folded edge part; 172, external expansion part; 180, long hole; 191, reduction part; 192, internal folded part; 200, internal expansion nail; 300, tail plate; 310, fixing piece; 311, upper plate; 312, lower plate; 313, connecting part; 400, expansion tube; 410, screw. DETAILED DESCRIPTION

[0046] The following will further describe the specific implementation of the utility model in combination with the accompanying drawings of the embodiments, so that the technical solution of the utility model is easier to understand and grasp. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0047] Embodiment 1

[0048] This embodiment provides an anchor nail, such as Figure 1-5 As shown, it includes an outer expansion tube 100 and an inner expansion nail 200, the outer expansion tube 100 is sleeved on the inner expansion nail 200, an upper anchoring structure is provided on the upper part of the outer expansion tube 100, two pairs of U-shaped holes 120 are provided on the lower tube wall of the outer expansion tube 100 to form four expansion parts 130, the upper anchoring structure includes a glue injection port 140 located at the upper end of the outer expansion tube 100 and a plurality of glue outlet holes 150 located on the upper tube wall of the outer expansion tube 100, a protrusion 131 is provided on the inner side of the expansion part 130, and the inner expansion nail 200 has a first position and a second position, so that when the inner expansion nail 200 is in the first position, the outer wall of the expansion part 130 is flush with the outer wall of the outer expansion tube 100, and when the inner expansion nail 200 is in the second position, the expansion part 130 protrudes from the outer wall of the outer expansion tube 100. Both the outer expansion tube 100 and the inner expansion nail 200 can be made of stainless steel. The outer expansion tube 100 has a vertically penetrating slit 160 on its wall, i.e., the radial cross section of the outer expansion tube 100 is C-shaped or an open annular shape, which can be wound, and the lower end of the inner expansion nail 200 is a conical head, so that the inner expansion nail 200 is easier to move downward when being struck. In other optional embodiments, the U-shaped holes 120 can also be one pair or more than two pairs.

[0049] The upper end of the outer expansion tube 100 has a folded edge portion 171 bent to both sides, and a sealing rubber pad is provided on the inner and outer surfaces of the glue injection port 140 to facilitate better sealing between the glue injection head and the upper end of the outer expansion tube 100 during glue injection. The upper part of the outer expansion tube 100 is provided with a reduced diameter port 141 to prevent the inner expansion nail 200 from falling out from the first end after being installed.

[0050] The initial state of the inner expansion nail 200 is in the first position. When the anchor nail is inserted into place, the inner expansion nail 200 is knocked to move the inner expansion nail 200 to the second position. The inner expansion nail 200 squeezes the protrusion 131 on the inner side of the expansion part 130, so that the expansion part 130 is deformed and protrudes toward the outside of the external expansion tube 100. The expansion part 130 is in an expanded state, so that the anchor nail is firmly connected to the outer wall hole.

[0051] In this embodiment, the anchor can be used in the repair of tile walls and painted walls. The anchor without the tail plate 300 is mainly used for the repair of tile walls. During the repair, the anchor is fixed to the wall mainly by glue injection and mechanical anchoring connection process. The glue injection process is to inject anchoring glue into the glue injection port 140 of the external expansion tube 100, and the anchoring glue is filled into the gap 160 between the external expansion tube 100 and the outer wall hole from the glue outlet hole 150 on the tube wall of the external expansion tube 100. The mechanical anchoring process is that the inner expansion nail 200 is knocked from the first position to the second position, and at the same time, the expansion part 130 on the external expansion tube 100 is expanded to both sides and in close contact with the inner surface of the hole, so that the external expansion tube 100 is firmly fixed in the outer wall hole.

[0052] Embodiment 2

[0053] The U-shaped hole 120 of the first embodiment is a positive U-shape, while the U-shaped hole 120 of this embodiment is an inverted U-shape. Figure 6-8 As shown, when the expansion portion 130 is in the expanded state, a barb-like structure is formed, so that the anchor nail is fixed more firmly.

[0054] In Embodiment 1 and Embodiment 2, the directions of the U-shaped holes 120 are consistent. In other optional embodiments, the orientations of the groups of U-shaped holes 120 may also be different, for example, the bottom U-shaped hole is a regular U-shape, and the others are inverted U-shapes; or the bottom U-shaped hole is an inverted U-shape, and the others are regular U-shapes.

[0055] The other structures and effects of this embodiment are consistent with those of the first embodiment.

[0056] Embodiment 3

[0057] The anchoring nail in the first embodiment does not have a tail plate 300, while the anchoring nail in this embodiment includes a tail plate 300. Figure 9-10 As shown, the outer expansion tube 100 passes through the tail plate 300, and the folded edge portion 171 abuts against the tail plate 300. When the upper end of the anchor nail needs to fix mesh cloth, anti-cracking felt, etc., the anchor nail presses the mesh cloth, anti-cracking felt, etc. through the two folded edges 171 and the tail plate 300.

[0058] The other structures and effects of this embodiment are consistent with those of the first embodiment.

[0059] Embodiment 4

[0060] On the basis of the third embodiment, this embodiment further adds a fixing member 310. Fig.11 , 12As shown, specifically, a plug-in hole is provided in the area outside the folding portion 171 of the tail plate 300, and the anchor nail also includes two U-shaped fixing members 310, and the fixing member 310 includes an upper plate body 311, a lower plate body 312, and a connecting portion 313 connecting the upper plate body 311 and the lower plate body 312, the upper plate body 311 is arranged on the upper surface of the folding portion 171, the lower plate body 312 is arranged on the lower surface of the tail plate 300, and the connecting portion 313 passes through the plug-in hole. In this way, the connection between the tail plate 300 and the external expansion tube 100 is more firmly established. In the process of fixing the tail plate 300, the fixing member 310 can first make an L-shaped plate, and when one end passes through the plug-in hole, it is folded and fixed with a special tool.

[0061] Embodiment 5

[0062] In the first embodiment, the mechanical anchoring connection is realized only by the expansion portion 130 of the outer expansion tube 100, and the inner expansion nail 200 is knocked from the first position to the second position by a dedicated shaft and hammer. Fig.13 , 14 As shown, this embodiment adopts a dual mechanical anchoring connection structure, and no glue injection process is required. Specifically, the upper anchoring structure includes at least two elongated holes 180 located on the upper tube wall of the outer expansion tube 100, and the outer expansion tube 100 is provided with an expansion tube 400, so that when the screw 410 is screwed into the expansion tube 400, the expansion tube 400 protrudes from the elongated hole 180. The mechanical anchoring structure of the expansion tube 400 cooperates with the mechanical anchoring structure of the expansion part 130 to form a dual mechanical anchoring structure. The screw 410 of this embodiment is screwed into the expansion tube 400, and the expansion tube 400 is further screwed in after expansion, so that the inner expansion nail 200 can be pushed from the first position to the second position. Alternatively, during installation, the outer expansion tube 100 with the inner expansion nail 200 can be first set in the outer wall hole, and then the inner expansion nail 200 can be knocked from the first position to the second position with a special shaft and hammer, and then the expansion tube is set in the outer expansion tube, and finally the screw 410 is screwed into the expansion tube so that the expansion tube protrudes from the elongated hole 180 out of the outer expansion tube 100.

[0063] In this embodiment, the reduced diameter opening 141 in the first embodiment is not required, because the expansion tube 400 can prevent the inner expansion nail 200 from falling out. Other structures and effects of this embodiment are consistent with those of the first embodiment.

[0064] Embodiment 6

[0065] This embodiment further provides a reduced diameter portion 191 on the basis of the fifth embodiment. Fig.15 , 16 As shown, the upper end of the outer expansion pipe 100 is provided with a reduced diameter portion 191, and the reduced diameter portion 191 can prevent the expansion pipe 400 from upwardly separating from the outer expansion pipe 100. In this way, the connection between the expansion pipe 400 and the outer expansion pipe 100 is more secure.

[0066] The other structures and effects of this embodiment are consistent with those of the fifth embodiment.

[0067] Embodiment 7

[0068] like Fig.17 As shown, in this embodiment, the reduced diameter portion 191 in the sixth embodiment is replaced by an inner folding portion 192. That is, the upper end of the outer expansion tube 100 is provided with an inner folding portion 192 that is bent inward.

[0069] The other structures of this embodiment are consistent with those of the sixth embodiment.

[0070] Embodiment 8

[0071] In this embodiment, the folded edge portion 171 in the first embodiment is replaced by an outward expansion portion 172. Fig.18 As shown, the upper end of the external expansion tube 100 has a trumpet-shaped external expansion portion 172 .

[0072] The other structures and effects of this embodiment are consistent with those of the first embodiment.

[0073] Embodiment 9

[0074] The difference between this embodiment and the third embodiment mainly lies in the upper anchoring structure. The upper anchoring structure of this embodiment is also an expansion part formed on the outer expansion tube. Figure 19-20 As shown, two pairs of U-shaped holes 120 are provided on the lower tube wall of the outer expansion tube 100 to form four expansion parts 130, and the upper anchoring structure is that two pairs of U-shaped holes 120 are provided on the upper tube wall of the outer expansion tube 100 to form four expansion parts 130; the inner sides of all the expansion parts 130 are provided with protrusions 131, and when the inner expansion nail 200 is not knocked into the outer expansion tube 100, the outer wall of the expansion part 130 on the outer expansion tube is flush with the outer wall of the outer expansion tube 100; when the inner expansion nail 200 is knocked into the outer expansion tube 100, all the expansion parts 130 protrude from the outer wall of the outer expansion tube 100.

[0075] In this embodiment, the anchor can be used in the repair of the wall with insulation board. During the repair, the anchor is fixed with a single mechanical anchor connection process. Specifically, when the inner expansion nail 200 is knocked into the outer expansion tube, all the expanded parts 130 on the outer expansion tube 100 expand to both sides and are in close contact with the inner surface of the hole, so that the outer expansion tube 100 is firmly fixed in the outer wall hole.

[0076] The other structures of this embodiment are consistent with those of the third embodiment.

[0077] It should be noted that the anchor nails in this embodiment can be used not only in the field of exterior wall repair, but also in the anchoring of products such as insulation boards and insulation decoration integrated boards in new buildings. Figure 3 Perspective.

[0078] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A reinforced anchor nail, characterized in that: The invention comprises an outer expansion tube (100) and an inner expansion nail (200), wherein an upper anchoring structure is provided on the upper part of the outer expansion tube (100), and at least a pair of U-shaped holes (120) are provided on the lower tube wall of the outer expansion tube (100) to form an expansion portion (130), and a protrusion (131) is provided on the inner side of the expansion portion (130). When the inner expansion nail (200) is embedded between the pair of protrusions (131), the expansion portion (130) protrudes from the outer wall of the outer expansion tube (100).

2. A reinforced anchor nail according to claim 1, characterized in that: The outer expansion tube (100) is sleeved on the inner expansion nail (200), and the inner expansion nail (200) has a first position and a second position, so that when the inner expansion nail (200) is in the first position, the outer wall of the expansion portion (130) is flush with the outer wall of the outer expansion tube (100), and when the inner expansion nail (200) is in the second position, the expansion portion (130) protrudes from the outer wall of the outer expansion tube (100); The U-shaped hole (120) is a positive U-shape or an inverted U-shape.

3. A reinforced anchor nail according to claim 1, characterized in that: The upper anchoring structure comprises a glue injection port (140) located at the upper end of the outer expansion tube (100) and a plurality of glue outlet holes (150) located on the upper tube wall of the outer expansion tube (100). The upper part of the outer expansion tube (100) is provided with a reduced diameter port (141) for preventing the inner expansion nail (200) from falling out from the first end after being installed.

4. A reinforced anchor nail according to claim 1, characterized in that: The upper end of the external expansion tube (100) has a folded edge portion (171) bent toward both sides, or the upper end of the external expansion tube (100) has a trumpet-shaped outward expansion portion (172).

5. A reinforced anchor nail according to claim 4, characterized in that: The anchoring nail comprises a tail plate (300), the outer expansion tube (100) passes through the tail plate (300), and the folded edge portion (171) abuts against the tail plate (300).

6. A reinforced anchor nail according to claim 5, characterized in that: The tail plate (300) is provided with a plug-in hole in an area outside the folded edge portion (171), and the anchor nail also includes two U-shaped fixing members (310). The fixing members (310) include an upper plate body (311), a lower plate body (312), and a connecting portion (313) connecting the upper plate body (311) and the lower plate body (312). The upper plate body (311) is arranged on the upper surface of the folded edge portion (171), and the lower plate body (312) is arranged on the lower surface of the tail plate (300), and the connecting portion (313) passes through the plug-in hole.

7. A reinforced anchor nail according to claim 1, characterized in that: At least two pairs of U-shaped holes (120) are provided on the lower tube wall of the external expansion tube (100) to form an expansion portion (130), wherein the U-shaped hole at the bottom is a regular U-shape, and the rest are inverted U-shapes; or the U-shaped hole at the bottom is an inverted U-shape, and the rest are regular U-shapes.

8. A reinforced anchor nail according to claim 1, characterized in that: The upper anchoring structure comprises at least two elongated holes (180) located on the upper tube wall of the external expansion tube (100), and an expansion tube (400) is arranged inside the external expansion tube (100), so that when a screw (410) is screwed into the expansion tube (400), the expansion tube (400) protrudes from the external expansion tube (100) through the elongated holes (180).

9. A reinforced anchor nail according to claim 8, characterized in that: The upper end of the external expansion tube (100) is provided with a reduced diameter portion (191) or the upper end of the external expansion tube (100) is provided with an inwardly bent portion (192) bent inwardly.

10. A reinforced anchor nail according to claim 1, characterized in that: The upper anchoring structure is an outer expansion tube (100) having two pairs of U-shaped holes (120) on the upper tube wall to form four expansion parts (130); the inner side of the expansion part (130) is provided with a protrusion (131), and the inner expansion nail (200) is simultaneously embedded between each pair of protrusions (131) so that all the expansion parts (130) protrude from the outer wall of the outer expansion tube (100).

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