A percussion expanding anchor

Abstract

The utility model discloses a kind of knock expansion type anchor nails, belong to outer wall anchor nail technical field, aim at overcoming the defect that anchor force of anchor nail is lower when existing outer wall is repaired and new building outer wall insulation board, insulation decorative board is installed. A pair of U-shaped holes are set in the lower part of the pipe wall of outer inflation pipe and the pipe wall inside U-shaped hole is bent to form the bending part of V-shaped, while expansion structure is arranged at the lower end of outer inflation pipe, so that the bending part and expansion structure are both expanded to both sides when knock expansion nail is knocked, the expansion area and expansion position of the pipe wall of outer inflation pipe are increased, and the anchoring force of anchor nail is improved.

Description

Technical Field

[0001] This utility model belongs to the field of external wall anchoring nail technology, and relates to a hammer-expansion type anchoring nail. Background Technology

[0002] In recent years, anchoring nails have been needed for the reinforcement and repair of building exterior walls and the anchoring of external insulation systems. However, since most of the base wall is made of aerated concrete blocks, porous bricks and other materials with low pull-out bearing capacity, ordinary expansion bolts are not strong enough for anchoring on exterior walls.

[0003] In the field of new construction, when insulation boards and decorative insulation panels are anchored to the exterior wall, the single-point anchoring force of the anchor is generally around 300N. This means that insulation boards and decorative insulation panels can only be fixed to the exterior wall using a process mainly based on adhesive mortar. When the performance of the adhesive mortar deteriorates after long-term use, the anchor is insufficient to ensure that the insulation boards and decorative insulation panels will not fall off the exterior wall.

[0004] In the field of reinforcement and repair of existing building exterior walls, grouting anchors are currently widely used for reinforcement and repair of exterior wall surfaces. For example, a utility model patent for an improved anchor for point-to-surface reinforcement and repair of ceramic tile finishes is disclosed in Chinese patent literature (authorization announcement number CN208534936U). It includes an outer expansion tube and an inner expansion nail. The outer expansion tube is fitted onto the inner expansion nail. The first end of the outer expansion tube is an injection hole with a flared opening, and the second end is constricted and symmetrically split into two halves along the axial direction. Several adhesive outlet holes are provided on the wall of the outer expansion tube. Although this patented technology can improve the anchoring force of the anchor, only the lower end of the outer expansion tube can be expanded by the inner expansion nail. While the anchoring force is higher than that of ordinary expansion screws, it is not significantly improved and urgently needs further improvement. Summary of the Invention

[0005] This utility model addresses the problems existing in the prior art by proposing a hammer-expansion type anchor nail, aiming to overcome the defect of low anchoring force of existing anchor nails during the repair of existing exterior walls and the installation of insulation boards and insulation decorative boards for exterior walls of new buildings.

[0006] This utility model is implemented as follows:

[0007] An impact-expansion type anchor includes an expansion tube and an impact-expansion nail, characterized in that at least a pair of U-shaped holes are provided on the lower middle part of the tube wall of the expansion tube, the inner side of the tube wall of the U-shaped holes is bent to form a V-shaped bend, the lower end of the expansion tube is provided with an expansion structure, when the impact-expansion nail is embedded in the corresponding position of the bend and the expansion structure, the bend and the expansion structure expand to both sides, and the upper end of the expansion tube has a folded edge that bends to both sides or is in the shape of a trumpet that is larger at the top and smaller at the bottom.

[0008] The expansion structure consists of two symmetrically divided expansion tube walls along the axial direction. The inner side of the expansion tube wall is provided with protrusions. When the hammering expansion nail is embedded in the protrusion, the expansion tube wall expands to both sides.

[0009] The expansion structure consists of a pair of U-shaped holes on the lower end of the outer expansion tube and a V-shaped bend formed by bending the inner wall of the U-shaped holes. When the hammering expansion nail is inserted into the bend, the bend expands to both sides.

[0010] The striking expansion nail is a steel nail inserted into the outer expansion tube, and the upper end of the steel nail is always higher than the upper end of the outer expansion tube.

[0011] The striking expansion pin is an inner expansion pin that is always completely inside the outer expansion tube.

[0012] The external expansion tube also includes an injection port located at the upper end of the external expansion tube and multiple dispensing holes located on the upper half of the tube wall.

[0013] The external expansion tube also includes an injection port located at the upper end of the external expansion tube. The external expansion tube is wound to form an adhesive outlet slit. An adhesive outlet slit is provided on the upper half of the tube wall in the area opposite to the adhesive outlet slit.

[0014] The upper half of the tube wall of the external expansion tube is provided with at least a pair of U-shaped holes. The tube wall inside the U-shaped holes is bent to form a V-shaped bend. When the hammering expansion nail is inserted into the bend, the bend expands to both sides.

[0015] The anchor bolt includes a disc, the expansion tube passes through the disc, and the folded edge abuts against the disc.

[0016] The upper end of the external expansion tube is provided with a reduced diameter opening and / or the tube wall above the bend is provided with a reduced diameter opening.

[0017] The present invention has the following beneficial effects:

[0018] (1) A pair of U-shaped holes are set in the lower part of the wall of the outer expansion tube and the inner wall of the U-shaped holes is bent to form a V-shaped bend. At the same time, an expansion structure is set at the lower end of the outer expansion tube so that when the hammering expansion nail is hammered, both the bend and the expansion structure expand to both sides, which increases the expansion area and expansion position of the wall of the outer expansion tube and improves the anchoring force of the anchor nail.

[0019] (2) A pair of U-shaped holes are set in the upper half, middle and lower half and the lower end of the tube wall of the external expansion tube, and the tube wall inside the U-shaped holes is bent to form a V-shaped bend. When the expansion nail is hammered into the upper half, middle and lower half and the lower end of the tube wall, the corresponding bends expand to both sides, which increases the expansion area and expansion position of the tube wall of the external expansion tube, and further improves the anchoring force of the anchor nail.

[0020] (3) An external expansion tube with a C-shaped radial cross section and a coiled shape is adopted. At the same time, a gap is reserved at both ends when the external expansion tube is coiled to form a glue outlet seam. A glue outlet long seam is set on the upper half of the tube wall in the area opposite to the glue outlet seam, so that the glue outlet range when the anchor nail is injected is larger and the friction between the anchor nail and the hole in the external wall is improved after the anchor nail is injected. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first angle structure of the external expansion tube in Embodiment 1;

[0022] Figure 2 This is a schematic diagram of the second angle structure of the external expansion tube in Embodiment 1;

[0023] Figure 3 This is a schematic diagram of the structure of the external expansion tube and the disc in Embodiment 1;

[0024] Figure 4 This is a schematic cross-sectional view of the anchor bolt before expansion in Example 1;

[0025] Figure 5 This is a schematic cross-sectional view of the expanded anchor bolt in Example 1;

[0026] Figure 6 This is a schematic diagram of the external expansion tube structure in Example 2;

[0027] Figure 7 This is a schematic diagram of the external expansion tube structure in Example 3;

[0028] Figure 8 This is a schematic diagram of the external expansion tube structure in Example 4;

[0029] Figure 9 This is a schematic diagram of the external expansion tube structure in Example 5;

[0030] Figure 10 This is a schematic diagram of the structure of the anchor nail before expansion in Example 6;

[0031] Figure 11 This is a schematic diagram of the structure of the anchor nail before expansion in Example 6.

[0032] Figure labeling: 100, external expansion tube; 110, U-shaped hole; 120, bend; 130, expansion tube wall; 131, protrusion; 132, expansion joint; 133, round hole; 140, folded edge; 150, glue inlet; 160, tube body through joint; 170, glue outlet hole; 180, glue outlet long joint; 190, glue outlet through joint; 200, hammered expansion nail; 300, disc. Detailed Implementation

[0033] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of this utility model easier to understand and master. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0034] Example 1

[0035] This embodiment provides a hammer-expansion type anchor, such as Figure 1-5 As shown, the device includes an external expansion tube 100 and a striking expansion pin 200. The lower middle portion of the external expansion tube 100 has at least a pair of U-shaped holes 110. The inner wall of the U-shaped holes 110 is bent to form a V-shaped bend 120. The lower end of the external expansion tube 100 has an expansion structure. When the striking expansion pin 200 is struck and embedded into the corresponding position of the bend 120 and the expansion structure, the bend 120 and the expansion structure expand to both sides. The upper end of the external expansion tube 100 has a bent edge 140 that bends to both sides. In other optional embodiments, the upper end of the external expansion tube 100 can also be configured as a trumpet shape, wider at the top and narrower at the bottom, instead of the bent edge 140.

[0036] The striking expansion pin has a first position and a second position, and the striking expansion pin 200 is located as follows: Figure 4 In the first position shown, neither the bent portion 120 nor the expansion structure expands to the sides, and the expansion pin 200 is in the position shown when struck. Figure 5 In the second position shown, both the bending portion 120 and the expansion structure expand to both sides to securely connect the anchor nail to the hole in the outer wall. The bending portion 120 and the expansion structure expand to both sides, thereby clamping the bending portion 120 and the expansion structure against the hole wall of the outer wall. Both the expansion tube and the hammered expansion nail can be made of stainless steel. In this embodiment, the U-shaped hole 110 is a regular U-shaped hole; in other optional embodiments, the U-shaped hole 110 can also be an inverted U-shaped hole.

[0037] The upper and lower reference in this embodiment Figure 4 In terms of direction, the lower middle part of the external expansion tube 100 is located in the lower half of the external expansion tube 100, and the lower end of the external expansion tube 100 is located below the lower middle part.

[0038] The outer expansion tube 100 is wound to form a tube body through-slit 160, so that the radial cross-section of the outer expansion tube 100 is C-shaped, and the width of the tube body through-slit 160 is less than 2 mm. The expansion structure is an expansion tube wall 130 that is symmetrically divided along the axial direction. The inner side of the expansion tube wall 130 is provided with a protrusion 131. When the hammering expansion nail is embedded in the position of the protrusion 131, the expansion tube wall 130 expands to both sides. There is a pair of circular holes 133 between the lower part and the lower end of the outer expansion tube 100. One circular hole 133 is located at the tube body through-slit 160. On the opposite side of the tube body through-slit 160, the outer expansion tube 100 has an expansion slit 132 that penetrates downward through the other circular hole 133. The tube body through-slit 160 and the expansion slit 132 divide the lower end of the outer expansion tube 100 into the expansion tube wall 130. The circular hole 133 can prevent the expansion slit 132 from cracking further upward.

[0039] The lower end of the striking expansion pin is tapered to make it easier for the pin to move downwards when struck.

[0040] like Figure 4 , 5 As shown, the striking expansion pin 200 is an inner expansion pin that is always completely inside the outer expansion tube. After the anchor pin expands, the inner expansion pin is located in the lower half of the outer expansion tube 100. The upper end of the outer expansion tube is provided with a reduced diameter opening to prevent the inner expansion pin from detaching. A further reduced diameter opening can be provided on the tube wall above the bend 120 to ensure that the inner expansion pin is in the second position and the anchor pin remains in the expanded state.

[0041] like Figure 3 As shown, the anchoring nail includes a disc 300, the outer expansion tube passes through the disc 300, and the folded edge 140 abuts against the disc 300.

[0042] After the hole in the outer wall is opened, the outer expansion tube with the inner expansion nail is inserted into the outer wall hole. In addition, the bent part 120 is constrained by the outer wall hole wall, and the lower end will swing towards the center area of ​​the tube wall. When the inner expansion nail is hammered in, the bent part 120 will swing to both sides, thereby driving the bent part 120 to expand to both sides and lock with the outer wall hole wall. At the same time, the expansion structure at the lower end of the outer expansion tube will also be squeezed and expanded by the inner expansion nail and locked with the outer wall hole wall.

[0043] Example 2

[0044] The main difference between this embodiment and Embodiment 1 lies in the structure of the upper half of the external expansion tube 100. In Embodiment 1, the anchoring nail does not undergo adhesive injection, and the upper half of the external expansion tube 100 does not have an adhesive outlet 170. For example... Figure 6 As shown, the upper half of the external expansion tube 100 in this embodiment has a plurality of square glue outlet holes 170, and the positions of the glue outlet holes 170 and the bend portion 120 are on the same side of the external expansion tube 100. Correspondingly, the upper end of the external expansion tube has a glue injection port 150.

[0045] After the internal expansion bolts are installed, grout is injected through the injection port 150. The grout can flow out from the outlet hole 170 and fill the gap between the anchor bolts and the holes in the external wall.

[0046] The other structures in this embodiment are the same as in Embodiment 1.

[0047] Example 3

[0048] In Example 1, the anchoring nails do not undergo adhesive injection; the through-slit width of the tube is small and not used for adhesive dispensing. For example... Figure 7 As shown, the external expansion tube in this embodiment also includes an injection port 150 located at the upper end of the external expansion tube. The external expansion tube is wound to form an adhesive outlet 190, so that the radial cross-section of the external expansion tube 100 is also C-shaped. The width of the adhesive outlet 190 is 2-4 mm. The wider adhesive outlet 190 is used for adhesive dispensing.

[0049] Furthermore, such as Figure 7 As shown, in this embodiment, the upper half of the tube wall of the external expansion tube 100 is provided with a glue outlet long slit 180 in the area opposite to the glue outlet through slit 190.

[0050] After the internal expansion bolts are installed, grout is injected through the injection port 150. The grout can flow out from the through joint 190 and the long joint 180 and fill the gap between the anchor bolt and the hole in the outer wall.

[0051] The other structures in this embodiment are the same as in Embodiment 1.

[0052] Example 4

[0053] The difference between this embodiment and Embodiment 2 lies in the expansion structure. For example... Figure 8 As shown, the expansion structure in this embodiment consists of a pair of U-shaped holes 110 on the lower end of the outer expansion tube and a V-shaped bend 120 formed by bending the inner side of the tube wall of the U-shaped holes 110. When the hammering expansion nail is inserted into the bend 120, the bend 120 expands to both sides, that is, both the lower middle bend 120 and the lower end bend 120 expand to both sides.

[0054] The other structures in this embodiment are the same as in Embodiment 2.

[0055] Example 5

[0056] The difference between this embodiment and Embodiment 4 lies in the dispensing structure. Embodiment 4 has a dispensing structure with multiple dispensing holes 170. For example... Figure 9 As shown, the glue dispensing structure in this embodiment adopts a glue dispensing through slit 190 and a glue dispensing long slit 180. The glue dispensing long slit 180 is located on the upper half of the tube wall of the outer expansion tube 100 in the area opposite to the glue dispensing through slit 190. The glue dispensing long slit 180 extends downward to the lower middle part of the outer expansion tube 100.

[0057] The other structures in this embodiment are the same as in Embodiment 4.

[0058] Example 6

[0059] The main difference between this embodiment and Embodiment 1 lies in the structure of the striking expansion pin 200. For example... Figure 10 , 11 As shown, in this embodiment, the striking expansion nail 200 is a steel nail inserted into the outer expansion tube. The upper end of the steel nail is always higher than the upper end of the outer expansion tube 100, so that the anchor nail can be directly struck to expand it. In this structure, the glue injection port 150 is blocked by the steel nail, and no glue injection operation is performed.

[0060] Steel nails are highly versatile. They can be pre-installed in the expansion tube or stored separately from it. When needed, they can simply be inserted into the expansion tube.

[0061] In other alternative embodiments, at least a pair of U-shaped holes may be provided on the upper half of the outer expansion tube wall. The inner side of the tube wall of the U-shaped holes is bent to form a V-shaped bend. When the hammer-driven expansion pin is embedded in the bend, the bend expands to both sides. In this way, the upper half of the outer expansion tube adopts a mechanical expansion anchoring structure instead of the glue injection anchoring structure in Embodiment 1.

[0062] The other structures in this embodiment are the same as in Embodiment 1.

[0063] The above description is merely a specific embodiment of the utility model, but the scope of protection 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 content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the utility model will be included within the scope of the claims.

Claims

1. A percussion expansion type anchor, comprising an expansion tube (100) and a percussion expansion pin (200), characterized in that, The lower part of the outer expansion tube (100) is provided with at least a pair of U-shaped holes (110). The inner wall of the U-shaped hole (110) is bent to form a V-shaped bend (120). The lower end of the outer expansion tube (100) is provided with an expansion structure. When the hammering expansion nail (200) is embedded in the corresponding position of the bend (120) and the expansion structure, the bend (120) and the expansion structure expand to both sides. The upper end of the outer expansion tube (100) has a folded edge (140) that bends to both sides or is in the shape of a trumpet that is larger at the top and smaller at the bottom.

2. The impact-expansion type anchor bolt according to claim 1, characterized in that, The expansion structure is a symmetrically divided expansion tube wall (130) along the axial direction. The inner side of the expansion tube wall (130) is provided with a protrusion (131). When the hammering expansion nail is embedded in the position of the protrusion (131), the expansion tube wall (130) expands to both sides.

3. The impact-expansion type anchor bolt according to claim 1, characterized in that, The expansion structure consists of a pair of U-shaped holes (110) on the lower end of the tube wall of the outer expansion tube and a V-shaped bend (120) formed by bending the inner side of the tube wall of the U-shaped holes (110). When the hammering expansion nail is embedded in the bend (120), the bend (120) expands to both sides.

4. The impact-expansion type anchor bolt according to claim 1, characterized in that, The striking expansion nail (200) is a steel nail inserted into the outer expansion tube, and the upper end of the steel nail is always higher than the upper end of the outer expansion tube (100).

5. The impact-expansion type anchor bolt according to claim 1, characterized in that, The percussion expansion pin (200) is an inner expansion pin that is always completely inside the outer expansion tube.

6. The impact-expansion type anchor bolt according to claim 5, characterized in that, The external expansion tube also includes an injection port (150) located at the upper end of the external expansion tube and multiple dispensing holes (170) located on the upper half of the tube wall of the external expansion tube.

7. The impact-expansion type anchor bolt according to claim 5, characterized in that, The external expansion tube also includes an injection port (150) located at the upper end of the external expansion tube. The external expansion tube is wound to form an adhesive outlet slit (190). An adhesive outlet slit (180) is provided on the upper half of the tube wall opposite to the adhesive outlet slit (190).

8. The impact-expansion type anchor bolt according to claim 1, characterized in that, The upper half of the tube wall of the external expansion tube is provided with at least a pair of U-shaped holes (110). The tube wall inside the U-shaped holes (110) is bent to form a V-shaped bend (120). When the hammering expansion nail is embedded in the bend (120), the bend (120) expands to both sides.

9. The impact-expansion type anchor bolt according to claim 1, characterized in that, The anchor pin includes a disc (300), the expansion tube passes through the disc (300), and the folded edge (140) abuts against the disc (300).

10. The impact-expansion type anchor bolt according to claim 1, characterized in that, The upper end of the external expansion tube is provided with a reduced diameter opening and / or the pipe wall above the bend (120) is provided with a reduced diameter opening.

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