TWI869985B - Reusable expansion bolt set - Google Patents

Abstract

A reusable expansion bolt set for solving the problem of difficulty in removing known expansion bolts after they are embedded. It includes: a cylinder body, wherein a first end of the cylinder body has a threaded hole extending towards the second end, and the second end has at least one open slot. At least one annular groove is provided on the outer surface of the cylinder body with the at least one open slot, for accommodating an open clip. The inner surface of the cylinder body having the at least one open slot is provided with a tapered hole, and the tapered hole gradually narrows from the vicinity of the threaded hole towards the second end. A fastener has a threaded portion for screwing into the threaded hole of the cylinder body. The fastener has an abutting portion, and the abutting portion forms a conical surface with a gradually reduced diameter towards the second end adjacent to the threaded portion.

Description

Recyclable expansion bolt set

The present invention relates to an expansion bolt assembly, in particular to a recyclable expansion bolt assembly that is embedded in a hole of a fixed object and can be easily removed.

A conventional expansion bolt set places a screw rod inside a shell. The screw rod has a tapered head. The screw rod and the shell shell are buried together in a hole in a fixed object. The threaded portion of the screw rod protrudes. on the surface of the fixture , the protruding threaded portion can be screwed by a nut, so that a fixed object can be fixed to the fixed object. This conventional expansion bolt set is commonly used on the exterior wall of a building, such as: signboards, placement Lingqi machine frame, etc.

When the known expansion bolt assembly is used, since the screw rod inserted in the shell has only a single size, when the protruding length or thread diameter of the screw rod needs to be changed, it becomes very difficult to remove the shell and the screw rod embedded in the hole of the fixture, and even workers will grind the already embedded and protruding screw rod flat, and then re-insert the expansion bolt assembly of different specifications in the adjacent position. This not only wastes time, but also the re-inserted expansion bolt assembly is adjacent to the previously implanted expansion bolt assembly, so that the strength of the fixture is destroyed, resulting in the problem of insufficient adhesion of the re-inserted expansion bolt assembly.

In view of this, the known expansion bolt assembly does need to be improved.

In order to solve the above problems, the main purpose of the present invention is to provide a recyclable expansion bolt assembly, wherein the shell and the screw embedded in the hole of the fixing object can be easily removed.

The second purpose of the present invention is to provide a recyclable expansion bolt assembly. When the shell and the screw embedded in the hole of the fixing object are not in use, the screw can be taken out, and the shell can be positioned in the hole of the fixing object without protruding, so that the shell can still be kept in a reusable state.

Another purpose of the present invention is to provide a recyclable expansion bolt assembly that can be replaced with connectors of different structures according to different usage requirements to achieve a diversified fixing method for different needs.

The directions or similar terms described in the present invention, such as "front", "rear", "left", "right", "upper", "lower", "inner", "outer", "side", etc., are mainly for reference to the directions of the attached drawings. Each direction or similar terms are only used to assist in the description and understanding of the various embodiments of the present invention, and are not used to limit the present invention.

The quantifiers "one" or "a" used in the components and parts described throughout the present invention are only for the convenience of use and to provide a general meaning of the scope of the present invention; in the present invention, they should be interpreted as including one or at least one, and the single concept also includes the plural case, unless it is obvious that it means otherwise.

The recyclable expansion bolt assembly of the present invention may include: a barrel having a first end and a second end opposite to each other, the first end having a screw hole portion extending toward the second end, the second end having at least one opening groove, the at least one opening groove forming an opening at the end surface of the second end, the outer surface of the barrel having the at least one opening groove having at least one annular groove, the at least one annular groove being used for inserting an opening fastener so that the opening fastener does not protrude from the outer surface of the barrel, the opening fastener having a closable elasticity, and the outer surface of the barrel having the at least one opening groove having at least one annular groove. The inner surface of the cylinder has a tapered hole portion, one end of the tapered hole portion is adjacent to the screw hole portion, and the tapered hole portion is gradually reduced in inner diameter from adjacent to the screw hole portion toward the second end, and the outer surface of the first end of the cylinder has at least one radially protruding protruding portion; A fixing member has a first end and a second end opposite to each other, the first end has a driving portion, a threaded portion is used to be screwed into the screw hole portion of the cylinder, and the second end has an abutment portion, the abutment portion is adjacent to the threaded portion, and the abutment portion is a tapered surface with a gradually reduced diameter from adjacent to the threaded portion toward the second end.

Accordingly, the recyclable expansion bolt assembly of the present invention has an open fastener with a constant radial contraction force at the second end of the cylinder. Therefore, when the abutment portion of the fixing member does not abut the tapered hole portion of the cylinder, the open fastener can force the second end of the cylinder to contract radially. In this way, the protruding portion of the cylinder can be clamped by a tool such as a pliers, so that the fixing member and the cylinder can be easily removed from the hole of the fixed object. In addition, when the cylinder is embedded in a fixed object, the cylinder will not rotate in the fixed object, and the cylinder and the hole wall of the fixed object have a better adhesion effect.

The tapered hole portion also includes a straight portion with a constant inner diameter, and the straight portion is adjacent to the smallest inner diameter portion of the tapered hole portion. In this way, the abutting portion of the fixing member can abut against the straight portion, which can ensure the effect of the constant radial expansion of the second end of the cylinder.

Among them, one of the at least one annular groove corresponds to the straight portion. In this way, it can be ensured that the second end of the cylinder always has the effect of radial contraction force.

The fixing member further includes a stress-weak portion and a separable portion, the end surface of the separable portion forms the second end of the fixing member, the abutment portion is located at the separable portion, and the stress-weak portion is between the threaded portion and the separable portion. The fixing member can be broken by the stress-weak portion, so that the separable portion and the fixing member are separated and not connected.

When the stress-weak portion can withstand a force less than the torsional force of rotating the fixing member, the fixing member is broken by the stress-weak portion, so that the separable portion and the fixing member are separated and not connected. In this way, the separable portion will still remain in the cylinder, and the second end of the cylinder can still remain radially expanded, so that the cylinder is still tightly fixed in the hole of the fixing object.

When the fixing member is taken out of the barrel, the separable portion still remains in the barrel, so that the second end of the barrel remains radially expanded. In this way, the separable portion still remains in the barrel, and the second end of the barrel remains radially expanded, so that the barrel remains tightly fixed in the hole of the fixing member.

The recyclable expansion bolt assembly of the present invention may further include an external component, the external component has a second connection portion, and the first end of the fixing component further includes a first connection portion, and the first connection portion is combined with the second connection portion. In this way, when the external component is combined with the first connection portion of the fixing component through the second connection portion, the external component can be connected to a fixed object.

The first connection part is a screw hole, and the second connection part is a threaded part. In this way, the external component can be conveniently connected to the fixing component.

[The present invention]

1: Cylinder

1a: First end

1b: Second end

11: Screw hole

12: Protrusion

13: Opening slot

14: Ring groove

15: Open fasteners

16: Tapered hole

17: Straight part

2: Fixing parts

2a: First end

2b: Second end

21: Threaded part

22: Drive unit

23: Butt joint

24: Stress vulnerable area

25: Separable part

26: First connection part

3: External components

31: Second connection part

C: Tools

F: Fixtures

H: hole

[Figure 1] An exploded perspective view of the first embodiment of the present invention.

[Figure 2] An exploded cross-sectional view of the first embodiment of the present invention.

[Figure 3] A cross-sectional view of the first embodiment of the present invention fixed to an object.

[Figure 4] A diagram showing the situation of removing the cylinder from the fixed object as shown in Figure 3.

[Figure 5] An exploded cross-sectional view of the second embodiment of the present invention.

[Figure 6] A cross-sectional view of the second embodiment of the present invention in use.

[Figure 7] A diagram showing the situation of removing the fixing member from the object to be fixed as shown in Figure 6.

[Figure 8] An exploded perspective view of the third embodiment of the present invention.

In order to make the above and other purposes, features and advantages of the present invention more clearly understood, the following specifically cites a preferred embodiment of the present invention and provides a detailed description in conjunction with the attached drawings.

The directions or similar terms described in the present invention, such as "front", "rear", "left", "right", "upper", "lower", "inner", "outer", "side", etc., are mainly for reference to the directions of the attached drawings. Each direction or similar terms are only used to assist in the description and understanding of the various embodiments of the present invention, and are not used to limit the present invention.

Please refer to Figures 1 and 2, which are the first embodiment of the recyclable expansion bolt assembly of the present invention, which may include a cylinder 1 and a fixing member 2, and the fixing member 2 may be screwed into a screw hole 11 of the cylinder 1.

The barrel 1 has a first end 1a and a second end 1b opposite to each other. The first end 1a has a screw hole 11 extending toward the second end 1b. The outer surface of the first end 1a of the barrel 1 may have at least one radially protruding protrusion 12, so that when the barrel 1 is buried in a fixture, the barrel 1 will not rotate in the fixture. The barrel 1 has at least one open groove 13 at the second end 1b, and the at least one open groove 13 forms an opening at the end surface of the second end 1b, so that the barrel 1 can expand and deform at the second end 1b. In this embodiment, the barrel 1 has four open grooves 13 distributed at equal angles at the second end 1b, so that the barrel 1 is easier to expand and deform and deform evenly distributed. The outer surface of the barrel 1 having the at least one opening groove 13 has at least one annular groove 14, and the at least one annular groove 14 is recessed in the outer surface of the barrel 1. The at least one annular groove 14 can accommodate an opening fastener 15 so that the opening fastener 15 is sunken in the at least one annular groove 14 and does not protrude from the outer surface of the barrel 1. The opening fastener 15 has closable elasticity so that the barrel 1 always has a radial contraction force at the second end 1b. The inner surface of the cylinder 1 having the at least one opening groove 13 has a tapered hole portion 16, one end of the tapered hole portion 16 is adjacent to the screw hole portion 11, and the tapered hole portion 16 gradually decreases in inner diameter from adjacent to the screw hole portion 11 toward the second end 1b. Preferably, the tapered hole portion 16 also includes a straight portion 17 with a constant inner diameter, and the straight portion 17 is adjacent to the minimum inner diameter portion of the tapered hole portion 16. Preferably, one of the at least one annular groove 14 corresponds to the straight portion 17.

The fixing member 2 has a threaded portion 21, so that the fixing member 2 can be screwed into the screw hole portion 11 of the barrel 1 through the threaded portion 21. The fixing member 2 has a first end 2a and a second end 2b opposite to each other. The first end 2a has a driving portion 22. The driving portion 22 can be a known cap or countersunk hole. The present invention is not limited to this, so that the fixing member 2 can be driven to rotate. The second end 2b of the fixing member 2 has an abutment portion 23, which is adjacent to the threaded portion 21. The abutment portion 23 is a tapered surface with a gradually decreasing diameter from the first end 2a of the fixing member 2 toward the second end 2b. When the fixing member 2 is screwed into the screw hole portion 11 of the cylinder 1 by the threaded portion 21, the abutment portion 23 can abut against the tapered hole portion 16 of the cylinder 1, so that the second end 1b of the cylinder 1 can be radially expanded (as shown in FIG. 3), so that the cylinder 1 can be screwed and fixed in the hole H of a fixing object F.

Please refer to Figure 4. When the cylinder 1 is to be taken out from the hole H of the fixture F, the fixture 2 is first rotated in the opposite direction from the cylinder 1 to make the abutment portion 23 leave the tapered hole portion 16 of the cylinder 1. At this time, the opening fastener 15 which always has a radial contraction force can force the second end 1b of the cylinder 1 to contract radially. In this way, the protruding portion 12 of the cylinder 1 can be clamped by a tool C such as a clamp, so that the fixture 2 and the cylinder 1 can be easily taken out from the hole H of the fixture F.

Please refer to FIG. 5, which is a second embodiment of the present invention. Compared with the first embodiment, the cylinder 1 can be placed in a level position in the hole H of the fixture F without being removed. In this embodiment, the fixture 2 further includes a stress-fragile portion 24 and a separable portion 25. The end surface of the separable portion 25 forms the second end 2b of the fixture 2. The abutment portion 23 is located on the separable portion 25. The weak portion 24 is between the threaded portion 21 and the separable portion 25. The stress-weak portion 24 can be formed into the most stress-weak portion of the fixing member 2 by grinding, sawing, etc. In this embodiment, the stress-weak portion 24 is formed into the most stress-weak portion of the fixing member 2 by making the diameter of the stress-weak portion 24 smaller than the diameter of the threaded portion 21 and the separable portion 25.

Please continue to refer to FIG. 6 . When a fixed object is to be fixed to the fixing object F, the barrel 1 is first placed in a hole H of the fixing object F, and the fixing member 2 is screwed into the screw hole 11 of the barrel 1 through the threaded portion 21. Thus, by strong rotation, the abutting portion 23 can abut against the tapered hole 16 of the barrel 1, so that the second end 1b of the barrel 1 can be radially expanded, so that the barrel 1 can be screwed and fixed in the hole H of a fixing object F. When the stress-weak portion 24 can withstand a force less than the torsional force of rotating the fixing member 2, the fixing member 2 can be broken by the stress-weak portion 24 where the stress is most weak, so that the separable portion 25 and the fixing member 2 are separated and not connected. Even when the fixing member 2 is rotated in the reverse direction and removed from the barrel 1 (as shown in FIG. 7 ), the detachable portion 25 will still remain in the barrel 1, and the second end 1b of the barrel 1 will still remain radially expanded, so that the barrel 1 is still firmly fixed in the hole H of the fixing object F, and the first end 1a of the barrel 1 is evenly located and does not protrude from the surface of the fixing object F.

Please refer to FIG. 8, which is a third embodiment of the present invention. Compared with the first embodiment, the recyclable expansion bolt assembly of the present invention may further include an external member 3, which may be combined with the fixing member 2 of the first embodiment or the second embodiment. The present invention is not limited thereto. In this embodiment, the fixing member 2 disclosed in the first embodiment is used for explanation. The first end 2a of the fixing member 2 further includes a first connecting portion 26. The first connecting portion 26 is connected to the fixing member 2 of the first embodiment. The first connecting portion 26 can be a screw hole or a threaded portion, and the present invention is not limited thereto. The first connecting portion 26 can be used to connect an external component 3 with the corresponding second connecting portion 31. As shown in the figure, the first connecting portion 26 is a screw hole, and the second connecting portion 31 of the external component 3 is a threaded portion. In this way, when the external component 3 is connected to the first connecting portion 26 of the fixing component 2 with the second connecting portion 31, the external component 3 can be used to suspend a fixed object.

In summary, the recyclable expansion bolt assembly of the present invention has an open fastener with a constant radial contraction force at the second end of the cylinder. Therefore, when the abutting portion of the fixing member does not abut the tapered hole portion of the cylinder, the open fastener can cause the second end of the cylinder to contract radially. Thus, the protruding portion of the cylinder can be clamped by a tool such as a pliers, so that the fixing member and the cylinder can be easily removed from the hole of the fixed object. In addition, the fixing member may also include a stress-weak portion and a separable portion at the second end. Thus, when the stress-weak portion can withstand a force less than the torsional force of rotating the fixing member, the fixing member may be broken from the stress-weak portion with the most fragile stress, so that the separable portion and the fixing member are separated and not connected and remain in the cylinder, so that the second end of the cylinder remains radially expanded and still firmly fixed in the hole of the fixing object for repeated use. In addition, the recyclable expansion bolt assembly of the present invention may also include an external component that can be combined with the fixing member, so that the expansion bolt assembly has the effect of multiple different usage modes.

Although the present invention has been disclosed using the above preferred embodiments, they are not intended to limit the present invention. Any person skilled in the art may make various changes and modifications to the above embodiments within the spirit and scope of the present invention, and the changes and modifications are still within the technical scope protected by the present invention. Therefore, the protection scope of the present invention shall include all changes within the meaning and equivalent scope recorded in the attached patent application scope.

1: Cylinder

1a: First end

1b: Second end

11: Screw hole

12: Protrusion

13: Opening slot

14: Ring groove

15: Open fasteners

16: Tapered hole

17: Straight part

2: Fixing parts

2a: First end

2b: Second end

21: Threaded part

22: Drive unit

23: Butt joint

Claims (8)

A recyclable expansion bolt assembly comprises: a barrel having a first end and a second end opposite to each other, the first end having a screw hole extending toward the second end, the second end having at least one opening groove, the at least one opening groove forming an opening at the end surface of the second end, the outer surface of the barrel having the at least one opening groove having at least one annular groove, the at least one annular groove being used for inserting an opening fastener so that the opening fastener does not protrude from the outer surface of the barrel, the opening fastener having a closable elasticity, and the barrel having the at least one opening groove having at least one opening groove. The inner surface of the body has a tapered hole portion, one end of the tapered hole portion is adjacent to the screw hole portion, and the tapered hole portion is gradually reduced in inner diameter from adjacent to the screw hole portion toward the second end, and the outer surface of the first end of the cylinder body has at least one radially protruding protruding portion; a fixing member has a first end and a second end opposite to each other, the first end has a driving portion, a threaded portion is used to be screwed into the screw hole portion of the cylinder body, and the second end has an abutment portion, the abutment portion is adjacent to the threaded portion, and the abutment portion is a tapered surface with a gradually reduced diameter from adjacent to the threaded portion toward the second end. As in claim 1, the recyclable expansion bolt assembly, wherein the tapered hole portion further includes a straight portion with a constant inner diameter, the straight portion being adjacent to the minimum inner diameter portion of the tapered hole portion. As in claim 2, the recyclable expansion bolt assembly, wherein one of the at least one annular groove corresponds to the straight portion. As in claim 1, the recyclable expansion bolt assembly, wherein the fixing member further comprises a stress-weakened portion and a separable portion, the end surface of the separable portion forms the second end of the fixing member, the abutment portion is located at the separable portion, and the stress-weakened portion is between the threaded portion and the separable portion. As in claim 4, the recyclable expansion bolt assembly, wherein when the stress-weakened portion can withstand a force less than the torsional force of rotating the fixing member, the fixing member breaks from the stress-weakened portion, so that the separable portion and the fixing member are separated and not connected. For example, in the recyclable expansion bolt assembly of claim 5, when the fixing member is removed from the cylinder, the separable portion still remains in the cylinder, so that the second end of the cylinder remains radially expanded. The recyclable expansion bolt assembly of claim 1 further includes an external member having a second connecting portion, and the first end of the fixing member further includes a first connecting portion, and the first connecting portion is combined with the second connecting portion. As in claim 7, the recyclable expansion bolt assembly, wherein the first connecting portion is a screw hole and the second connecting portion is a threaded portion.

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