JP3086141U - Expansion screw nail structure - Google Patents

Abstract

(57) [Summary] [Problem] To provide an expansion screw nail structure. The present invention provides an inflatable screw nail structure, which solves the problem that existing inflatable screw nails tend to fall off. The structure of the expansion screw nail of the present invention is composed of a screw, a belly sleeve and a nut, an O-shaped ring is provided in the nut, and after the screw passes through the belly sleeve and is screwed into the nut at the rear end. The thread groove of the screw and the O-ring are engaged with each other to firmly fix the screw, thereby preventing a situation in which the sleeve is loosened with the abdominal sleeve due to the vibration of an external force and the screw is dropped.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a type of expansion screw nail, and more particularly to a structure of an expansion screw nail generally used fixed to a wall surface. The present invention relates to a structure of an expansion screw nail in which wobble is prevented.

[0002]

[Prior art]

 An inflatable screw nail A used for construction and civil engineering is fixed in a wall surface and between articulated objects. The structure of the inflatable screw nail A is composed of a screw A1, a sleeve A2, and a conical nut A3. After the nut A3 is placed at the rear end of the sleeve A2 and embedded in the wall as shown in FIG. 1, the screw A1 is further passed through the sleeve A2 from the outside, and the screw thread is screwed. Then, after being gradually screwed in, the sleeve A2 is firmly fixed to the conical nut A3, so that the sleeve A2 gradually expands toward four circumferences, and due to the expansion, mutually presses against the wall surface, and is firmly connected. However, while such structures have been used for many years, they have drawbacks. That is, when the conical nut A3 is formed into a conical body and mutually pressed with the sleeve A2, the conical shape is affected and expands four times, and the wall surface is wobbled by an external force factor, or the expanded screw nail is Vibrating under the external force, the sleeve A2 gradually recovers and the expansion area of the sleeve A2 recovers in a long time, and the combination between the screw A1, the sleeve A2 and the conical nut A3 is loosened, and the sleeve is not tight and falls off. The situation occurred, and it was regarded as a problem that had to be extremely overcome due to the safety of product use.

[0003] In addition, as shown in FIG. 2, another type of inflatable screw nail B is composed of a screw B1, a sleeve B2, and a nut B3, and the front end of the nut B3 has a rectangular shape and has a hook shape. It is shaped and provided with a thread inside, and the screw B1 is directly screwed into the nut B3 via the sleeve B2. As the distance between the screw B1 and the nut B3 becomes shorter, the sleeve B2 expands toward the outer circumference. And fix the connection. However, when the nut B3 is accommodated in the sleeve B2 (in which the arc groove B4 is opened), a situation occurs in which the nut B3 is dropped and lost, that is, the combination between the sleeve B2 and the nut B3 is unstable when not in use. After screwing, it has the same problem as the former, that is, it is gradually loosened and falls off under the influence of external force vibration, and if it is not noticed before falling off, a safety problem occurs quickly at the next vibration I do. Therefore, the industry has been required to improve on this problem.

[0004]

[Problems to be solved by the invention]

 It is an object of the present invention to provide a kind of inflatable screw nail structure, which is a simple combination, at the same time as screwing, the three parts are firmly connected, the space between the wall connection is firm, and the external force factor There is no disadvantage of loosening and falling off.

[0005] The present invention also seeks to provide a kind of inflatable screw nail structure, in which the parts are combined with each other and extend in combination to increase the distance and increase the tensile strength, and in addition to other dimensions. There is no need to purchase any parts, and it has multiple utility values.

[0006]

[Means for Solving the Problems]

 The invention according to claim 1 comprises a screw accommodated in a belly-diameter sleeve, a belly-diameter sleeve having a groove formed in the belly-diameter portion and capable of generating an external expansion form, and a female screw structure comprising a pre-ring. A rear end nut in which a housing space is formed in a rear end portion, and an O-ring having a convex edge formed in the inner diameter and housed in the housing space to exhibit a covering form. Using the groove, the screw directly meshes with the convex edge of the O-ring through the belly sleeve and the rear end nut, strengthening the combination between each part, fixing it to the connecting object and the wall surface, and falling off due to external force vibration The structure is that of an expansion screw nail. According to a second aspect of the present invention, a hook is formed at a symmetrical position on the side of the groove of the bellows sleeve, and the hook engages with the front ring of the rear end nut to generate another stabilizing action. The expansion screw nail according to claim 1 is characterized in that: According to a third aspect of the present invention, there is provided an expansion screw nail according to the first aspect, wherein one or more of the belly-diameter sleeves are combined as needed to be extended.

[0007]

[Embodiment of the invention]

 The present invention provides a kind of inflatable screw nail structure, which is composed of screw 1, belly sleeve 2 and rear end nut 3. Please refer to FIGS. The screw 1 is a screw of a general standard form, and is housed in the belly sleeve 2.

The abdominal diameter sleeve 2 has a groove 21 in the abdominal diameter portion, so that an external expansion form can be generated.

The rear end nut 3 employs a female screw structure provided with a front ring 31, and a housing space 32 is employed at a rear end portion.

The O-ring 4 has a convex edge 41 formed on the inner diameter, and can be accommodated in the accommodation space 32.

The O-ring 4 is an annular body having a convex edge 41, which is housed in the housing space 32 of the rear end nut 3 in advance, and the outer edge of the housing space 32 is deformed by an external force, so that the O-ring 4 is formed. The inside of the rear nut 3 is completely covered, and the inner diameter of the convex edge 41 of the O-ring 4 is smaller than the internal thread of the rear nut 3, that is, the rear nut 3 is placed in the rear end portion of the belly sleeve 2, A head ring 31 is placed inside. At the time of use, the screw 1 penetrates the inside of the belly sleeve 2 and is directly screwed with the rear end nut 3. At this time, the screw groove 11 at the foremost end of the screw 1 is successively formed on the O-ring 4 of the rear end nut 3. When the nut is tightly tightened, the rear end nut 3 is gradually pressed in the direction of the abdominal sleeve 2, and the structure of the abdominal sleeve 2 other than the groove 21 is turned around four times. The screw 1 and the rear end nut 3 are tightly fixed by the installation of the O-ring 4, and the rear end nut 3 is compressed by the vibration of the external force. It does not create a situation in which it becomes more detached and gradually loosens, thus solving the shortcomings of the well-known structure and completely solving the safety problem.

Also, in the present invention, in consideration of safety issues, a symmetrical hook 22 is formed directly on the side of the groove 21 of the belly-diameter sleeve 2, and the hook 22 is formed on the front ring 31 of the rear end nut 3. Are mated with the hooks 22 when they enter the belly sleeve 2 to achieve a further combined fixing function and eliminate the drawbacks of falling off. This is as shown in FIG.

In the known structure, in any form, a single independent use and extension use were impossible, but according to the present invention, one or more abdominal sleeves 2 are combined at a fixed distance. After extending to a fixed distance, the rear end nut 3 is finally screwed and assembled to expand the plurality of belly sleeves 2 outward, fix the articulated object, and increase the tensile strength. Can achieve the expected function.

[0014]

[Effect of the invention]

 Taken together, the structure of the present invention reliably solves the shortcomings of the well-known technology, firmly secures external connections, provides further stability assurance, and ensures the step-by-step requirements for utility model registration. Matches Also, the structure of the present invention is not disclosed and has novelty.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a known structure.

FIG. 2 is an exploded perspective view of another known structure.

FIG. 3 is an exploded perspective view of the present invention.

FIG. 4 is a perspective view of the O-ring of the present invention.

FIG. 5 is another embodiment of the belly sleeve according to the present invention.

FIG. 6 is a view showing a plurality of combinations of belly diameter sleeves according to the present invention.

[Explanation of symbols]

 Reference Signs List A expansion screw nail A1 screw A2 sleeve A3 cone nut B expansion screw nail B1 screw B2 sleeve B3 nut B4 arc-shaped groove 1 screw 11 screw groove 2 belly sleeve 21 groove 22 hook 3 rear end nut 31 front ring 32 housing Space 4 O-ring 41 Convex edge

Claims (3)

[Utility model registration claims] 1. A screw housed in a belly-diameter sleeve, a groove formed in the belly-diameter portion, capable of generating an external expansion form, and a female screw structure having a pre-ring. And a rear end nut having a housing space formed in a rear end portion thereof, and an O-ring having a convex edge formed in an inner diameter and housed in the housing space to exhibit a covering form. And screw the belly sleeve,
Engage directly with the convex edge of the O-ring through the rear end nut,
The combination between each part is strong, it is fixed to the connecting object and the wall surface, and it does not fall off due to the vibration of external force,
Expansion screw nail structure. 2. A hook is formed at a symmetrical position on the side of the groove of the abdominal diameter sleeve, and the hook engages with a front ring of a rear end nut to generate another stabilizing action. 2. The structure of an inflatable screw nail as claimed in claim 1, wherein: 3. The expansion screw nail structure according to claim 1, wherein one or more of the belly-diameter sleeves can be extended and used in combination as needed.