TWI821818B - Expansion screw assembly - Google Patents

Abstract

The invention provides an expansion screw assembly, which includes a screw component, a nut component and a sleeve component. Among them, the screw has a tail, a body, a head and at least one groove. The tail is provided with an expansion structure, the head is provided with an external thread, and the groove is longitudinally arranged on the body and the head; the nut has a corresponding outer An internal thread of the thread enables the nut member to be detachably screwed to the head; and the sleeve member is made up of a long straight tube integrally formed, which is movably sleeved on the body and the head, and the long straight tube has at least A hook pull part, the hook pull part is detachably placed in the groove. Thereby, the hook part in the groove can be driven by turning the screw, and then the screw and the nut can be taken out and retracted from the hole. This process is easy, can retain the original hole, and will not damage the wall surface.

Description

Expansion screw assembly

The present invention relates to a fastening or fixing component, in particular to an expansion screw assembly.

For traditional expansion screws, after the screw and the sleeve are driven into the hole in the wall, the tail end of the screw located in the hole has a trumpet-shaped expansion structure. Therefore, when the external nut rotates, the screw will rotate outwards from the hole. When it comes out, the expansion structure of the trumpet-shaped structure will expand the sleeve, so that the sleeve also located in the hole is embedded in the inner wall of the hole. Therefore, the screw will be restricted in the hole and cannot be screwed out, thereby tightening the expansion screw. Tightly fixed to the wall.

However, after the traditional expansion screws are fixed, it is very difficult to remove the expansion screws unless the entire hole in the wall is destroyed or the screw is broken during the removal process. Furthermore, the holes where the expansion screws were originally installed often occupy the best installation position. Therefore, if the holes where the expansion screws were originally installed are destroyed and then another appropriate location is selected to drill holes again, it will not cause installation problems.

In view of this, the object of the present invention is to provide an expansion screw assembly, which can easily take out the expansion screw assembly without damaging the wall surface, retaining the original hole.

In order to achieve the above object, the present invention provides an expansion screw assembly, which includes a screw component, a nut component and a sleeve component. Wherein, the screw has a tail, a body, a head and At least one groove, the tail is provided with an expansion structure, the head is provided with an external thread, the groove is longitudinally disposed on the body and the head; the nut member has an internal thread corresponding to the external thread, so that the The nut piece is detachably screwed to the head; the sleeve piece is movably sleeved on the body and the head, and the sleeve piece has at least one hooking part, and the hooking part is detachably placed. Enter this groove.

Through the above component configuration and structural design, the expansion screw assembly provided by the present invention can be used to remove the screw member by simply turning the screw member so that the hook pull portion in the groove is driven until the sleeve member is removed. If all are destroyed, the screw together with the nut can be taken out and recovered from the hole. This process will not damage the wall surface, but can also retain the original hole, and then easily take out the expansion screw assembly.

10:Expansion screw assembly

20:Screw parts

22:Tail

221:Expansion structure

24:Body

26:Head

261: External thread

28: Groove

281: Incline

30:Nut parts

32: Internal thread

40:Sleeve piece

42: Long straight tube

421:Hook pull part

50:Expansion screw assembly

60:Screw parts

62:Tail

621:Expansion structure

66:Head

68: Groove

70:Nut parts

80:Sleeve piece

82:Long unit

821:Hook pull part

90:Expansion screw assembly

100:Screw parts

102:Tail

110:Nut parts

122:Long unit

1221: First bending section

1222: The second bending section

1223:Trap section

1224:interval

1225: Hook pull part

124: Groove

130:Expansion screw assembly

132: Groove

134: Hook pull part

140:Screw parts

Figure 1 is an exploded view of the expansion screw assembly in the first embodiment of the present invention; Figure 2 is an assembly view of the expansion screw assembly in the first embodiment of the present invention; Figure 3 is an exploded view of the expansion screw assembly in the first embodiment of the present invention. The cross-sectional view of the screw assembly when assembled mainly shows the hooking part on the sleeve member being placed in the groove; Figures 4 to 7 are diagrams of the use status of the expansion screw assembly in the first embodiment of the present invention, in which the first Figure 4 shows the expansion screw assembly being put into the hole in the wall, but the nut has not yet been turned; Figure 5 shows that after the expansion screw assembly is put into the hole in the wall, the nut is turned to expand the sleeve and become stuck. The situation on the inner wall of the hole; Figure 6 shows the expansion screw assembly after removing the nut and pushing the screw into the hole; Figure 7 shows the expansion screw assembly sleeve after expansion, turning the screw The sleeve member is collapsed and taken out; Figure 8 is an exploded view of the expansion screw assembly in the second embodiment of the present invention; Figure 9 is a component assembly diagram of the expansion screw assembly in the second embodiment of the present invention; Figure 10 is a cross-sectional view of the expansion screw assembly in the second embodiment of the present invention, mainly showing the hooking portion on the sleeve member. into the groove; Figures 11 to 14 are diagrams of the use state of the expansion screw assembly in the second embodiment of the present invention. Figure 11 shows that the expansion screw assembly is placed into the hole in the wall, but the nut has not yet been turned. The situation; Figure 12 shows that after the expansion screw assembly is put into the hole in the wall, the nut is rotated to expand the sleeve member and is stuck on the inner wall of the hole; Figure 13 shows the expansion screw assembly with the nut removed After the expansion screw assembly is installed, the screw is pushed into the hole; Figure 14 shows the expansion of the sleeve of the expansion screw assembly, and the screw is rotated to make the sleeve wrap around the screw; Figure 15 shows the third aspect of the present invention An exploded view of the expansion screw assembly in the embodiment; Figure 16 is an assembly diagram of the expansion screw assembly in the third embodiment of the present invention; and Figure 17 is a cross-sectional view of the expansion screw assembly in the fourth embodiment of the present invention. , mainly showing the hooking part on the sleeve piece being placed in the groove.

Please refer to Figures 1 to 3. The expansion screw assembly 10 provided by the first embodiment of the present invention includes a screw part 20, a nut part 30 and a sleeve part 40.

The screw member 20 has a tail portion 22, a body portion 24, a head portion 26 and at least one groove 28. The body 24 of the screw member 20 is located between the tail 22 and the head 26 . The tail 22 of the screw 20 is provided with an expansion structure 221. The diameter of the transverse section of the expansion structure 221 gradually increases from the body 24 toward the tail 22, forming a conical shape as shown in Figure 1, but is not limited to this. . The head 26 of the screw member 20 is provided with an external thread 261 . The groove 28 is longitudinally extending from the head 26 toward the body 24 and is provided on the body 24 and the head 26 . Furthermore, the groove 28 is located on the wall near one end of the tail 22 There is a slope 281 with grooves 28 whose depth gradually decreases from the body 24 toward the tail 22 . The number of grooves 28 is not limited to one, but may also be two or three, depending on the user's structural design. need.

The nut part 30 has an internal thread 32 corresponding to the external thread 261 on the head 26 of the screw part 20. Through the mutual threading of the external thread 261 and the internal thread 32, the nut part 30 is detachably screwed to the screw part 20. head 26.

The sleeve member 40 in this embodiment is composed of a long straight tube 42 integrally formed, and is movably sleeved on the body 24 and the head 26 . The long straight tube 42 has at least one hooking portion 421 , and the hooking portion 421 is detachably placed in the groove 28 , and the length of the hooking portion 421 is less than or equal to the depth of the groove 28 . As shown in Figures 2 and 3, the wall surface of the long straight tube 42 is bent inward to form an L-shaped hooking portion 421. The free end of the L-shaped folded out part is placed in the groove 28, and the number of the hooking portions 421 is not limited. The three shown in Figures 1 and 2 are limited to three, and can be increased or decreased according to the user's structural design requirements and the number of corresponding grooves 28.

As shown in Figures 4 to 7, when using the expansion screw assembly 10 provided by the present invention, first open a hole on the wall surface to be installed, and then put the assembled expansion screw assembly 10 into the hole from the tail 22 until The tail part 22 is completely put into the hole, and only the head part 26 and the nut part 30 are exposed, as shown in Figure 4. Then rotate the nut member 30. Through the mutual screwing relationship between the internal thread 32 and the external thread 261, when the nut member 30 continues to rotate when it resists the hole, the screw member 20 will be driven by the nut member 30. Move toward the outside of the hole, and at the same time, the sleeve member 40 will be pushed toward the tail 22 by the nut member 30. The inclined surface 281 in the groove 28 can allow the hook portion 421 to be pushed out smoothly, so that the expansion structure 221 of the tail 22 will be formed by a long The integrally formed sleeve member 40 of the straight tube 42 is opened from one end close to the tail 22. After the long straight tube 42 is opened, it will be embedded in the inner wall of the hole, so that the screw member 20 is firmly supported in the hole. As shown in Figure 5. Finally, when it is time to take out the screw part 20, just remove the nut part 30 first, and then remove the screw part 20 Push it into the hole. At this time, the inclined surface 281 in the groove 28 can also ensure that the hook part 421 can be smoothly introduced into the groove 28. As shown in Figure 6, turn the screw 20 again. Since it is placed in the groove 28 The hook part 421 will cause the long straight tube 42 to be driven by the rotating screw 20. As the screw 20 rotates, the wall surface of the long straight tube 42 will gradually collapse and shrink until the long straight tube 42 is destroyed, thereby causing the expansion structure. 221 is no longer stuck on the inner wall of the hole. At this time, the screw 20 together with the sleeve 40 can be taken out and withdrawn from the hole, as shown in Figure 7. This process will not damage the wall and retain the original hole. , and the screw part 20 can be quickly and completely taken out, so that these components can be reused.

Figures 8 to 14 show an expansion screw assembly 50 provided in the second embodiment of the present invention. Most of the components and structures are the same as those in the first embodiment and will not be described again. The difference lies in the sleeve member 80. It is composed of a long unit 82 integrally formed, and the long unit 82 is spirally wound to form a cylindrical shape, and one end thereof close to the tail 62 or the head 66 is bent inward to form an L-shaped hook. part 821, and the free end folded out in an L shape is placed in the groove 68. In the second embodiment, there are two hooking parts 821 in total, and one end is formed near the tail 62 and the head 66 respectively. part 821, but in other embodiments, the hooking part 821 may also be separately provided at one end close to the tail part 62 and the head part 66, which is not limited to the description in this embodiment. As shown in Figures 11 to 14, when using the expansion screw assembly 50 provided by the present invention, first put the assembled expansion screw assembly 50 into the hole, and then, as shown in Figure 11, rotate the nut 70 to drive the screw The member 60 moves toward the outside of the hole. At the same time, the sleeve member 80 will be pushed toward the tail 62 by the nut member 70. The expansion structure 621 of the tail 62 will open the sleeve member 80 integrally formed by the long unit 82 from one end close to the tail 62. Support, let the strip unit 82 be embedded in the inner wall of the hole, so that the screw member 60 is firmly supported in the hole, as shown in Figure 12. When taking out the screw part 60, first remove the nut part 70, and then push the screw part 60 into the hole, as shown in Figure 13, then rotate the screw part 60, and use the groove 68 to drive the hook part 821 to make it longer. The strip unit 82 changes as the screw member 60 rotates. Go around the body of the screw member 60 until the sleeve member 80 is completely destroyed, so that the strip unit 82 is no longer stuck on the inner wall of the hole. At this time, the screw member 60 and the sleeve member 80 can be removed together. Take it out and retract it from the hole, as shown in Figure 14, to achieve the effect of not damaging the wall surface, retaining the original hole, and completely taking out the screw part 60. In this embodiment, when the hook-pull part 821 is disposed close to the head 66, since the hook-pull part 821 is close to the hole, the user can also directly use tools such as needle-nose pliers to clamp the hook-pull. The sleeve part 80 can also be destroyed by directly pulling outwards after the end 821, thereby achieving the effect of not damaging the wall surface, retaining the original hole, and completely taking out the screw part 60.

Figures 15 to 16 show an expansion screw assembly 90 provided by the third embodiment of the present invention. Most of the components and structures are the same as those in the first and second embodiments and will not be described again. The difference lies in the strip unit. 122 has a plurality of first bending sections 1221, a plurality of second bending sections 1222, and a plurality of snare sections 1223 located between the first bending sections 1221 and the second bending sections 1222. The bending section 1221, the plurality of second bending sections 1222 and the plurality of snare sections 1223 are formed in an S-shaped continuous bending manner, wherein the snare sections 1223 are wound around in a circle so that the plurality of first bending sections 1221 are connected with the plurality of third snare sections. A gap 1224 is formed between the two bent sections 1222 to form a cylindrical shape. The plurality of first bending sections 1221 are further bent toward the center of the loop to form a plurality of L-shaped hooking portions 1225 , and these hooking portions 1225 are placed in the grooves 124 . Through such a structural design, when the sleeve member 120 is pushed toward the tail 102 of the screw member 100 by the nut member 110, the plurality of first bending segments 1221 and the plurality of second bending segments 1222 are The spacer 1224 design allows the sleeve member 120 to be opened more easily, thereby allowing the strip unit 122 to be more firmly embedded in the inner wall of the hole, thereby enhancing the strength of the expansion screw assembly 90 during use.

In addition, Figure 17 shows an expansion screw assembly 130 provided in the fourth embodiment of the present invention. Most of the components and structures are the same as those in the first to third embodiments and will not be described again. The differences are The groove 132 is designed into a dovetail-shaped structure to further ensure that the hook portion 134 placed in the groove 132 will not easily come out of the groove 132 and cause the screw member 140 to be unable to be wound smoothly when rotating.

It must be noted here that the above detailed description in conjunction with the drawings is only an implementation mode provided to illustrate the technical content and characteristics of the present invention. Anyone with general knowledge in the field of the present invention will not understand the present invention. After the technical content and characteristics, various simple modifications, replacements or omissions of components without violating the spirit of the present invention shall fall within the scope of the patent application disclosed in the present invention.

10:Expansion screw assembly

20:Screw parts

22:Tail

221:Expansion structure

24:Body

26:Head

261: External thread

28: Groove

281: Incline

30:Nut parts

32: Internal thread

40:Sleeve piece

42: Long straight tube

421:Hook pull part

Claims (11)

An expansion screw assembly includes: a screw member having a tail, a body, a head and at least one groove, the tail is provided with an expansion structure, the head is provided with an external thread, and the groove is longitudinally arranged on the The body and the head; a nut piece having an internal thread corresponding to the external thread, so that the nut piece is detachably screwed to the head; and a sleeve piece movably sleeved on the head The body and the head, the sleeve member has at least one hooking part, the hooking part is detachably placed in the groove; when the screw member is rotated, the hook placed in the groove is driven The pull part causes the wall surface of the sleeve member to collapse and shrink. The expansion screw assembly of claim 1, wherein the diameter of the transverse section of the expansion structure gradually increases from the body toward the tail. The expansion screw assembly of claim 1, wherein the groove is close to the wall surface at one end of the tail, and its depth gradually decreases from the body toward the tail. The expansion screw assembly as claimed in claim 1, wherein the hooking portion is formed by bending the wall surface of the sleeve member inward. The expansion screw assembly of claim 1, wherein the length of the hooking portion is less than or equal to the depth of the groove. The expansion screw assembly as claimed in claim 1, wherein the sleeve member is integrally formed and wound by a long unit. The expansion screw assembly of claim 6, wherein the strip unit is spirally wound to form a cylindrical shape. The expansion screw assembly of claim 6, wherein one end of the strip unit near the tail or the head is bent inward to form the L-shaped hook portion. The expansion screw assembly according to claim 6, wherein the strip unit has a plurality of first bending sections, a plurality of second bending sections, and is located between the first bending sections and the second bending sections. There are a plurality of snare sections in between, and the snare sections are wound in a circle to form a gap between the plurality of first bending sections and the plurality of second bending sections. The expansion screw assembly as claimed in claim 9, wherein the plurality of first bending sections are further bent toward the center of the ring to form a plurality of L-shaped hooking portions. The expansion screw assembly as claimed in claim 1, wherein the groove is in a dovetail shape.

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