JP3215703U - Wall nail structure - Google Patents

Abstract

To provide a wall nail structure that is easy to use because the number of parts constituting the wall nail is small and the member cost is low. A wall nail structure includes an expansion sleeve and an expansion shaft. A female thread portion 10 is formed in the expansion sleeve 1 from one end inward in the axial direction. A tapered conical groove 11 whose width gradually decreases is formed at the bottom of the female screw portion 10. The groove bottom of the conical groove 11 is positioned substantially on the axial center of the expansion sleeve 1, and a plurality of claw portions 12 that are pushed out or pulled back are provided at the other end of the expansion sleeve 1. The claw portions 12 are separated by a plurality of axial separation grooves 13. Each separation groove 13 intersects at an intersection A on the axis of the expansion sleeve 1. The intersection A is inserted into the groove bottom of the conical groove 11. Around the expansion sleeve 1, a plurality of ribs 14 project from one end where the claw portions 12 are not provided. Each rib 14 extends outward from the periphery of the expansion sleeve 1. [Selection] Figure 3

Description

  The present invention relates to a wall nail, and more particularly to a wall nail structure in which the entire wall nail can be extracted from a hole.

  The conventional wall nail structure is used to fix an object to a wall surface. Generally, when actually used, the wall nail is drilled into the wall surface with an electric drill and then installed inside, and the wall nail is fixed to the wall surface by screwing. And position the object. However, even if you want to remove the object at a later date, the wall nail structure is a structure that can not be removed, so it was often hidden without processing, but there is a danger of being injured by hitting the body In addition, when it was removed by a cutting method, the wall surface was damaged, leaving dirty marks, and the removed wall nail could not be used again.

  As shown in FIG. 7, the conventional wall nail structure includes an expansion shaft 90, an expansion sleeve 91, an adjustment tube 92, and two nuts 93. The expansion shaft 90 is screwed into the expansion sleeve 91 by a male screw 900. The expansion sleeve 91 is screwed into the adjustment tube 92 by a male screw 910. One end of the expansion shaft 90 protrudes from the adjustment pipe 92, and two nuts 93 are sequentially screwed to the other end. The two nuts 93 are screwed together by adjusting the relative positions of the expansion shaft 90 and the expansion sleeve 91.

  As shown in FIG. 8, in the conventional wall nail structure, when a hole 94 is first formed in the wall and a spanner is attached to the hexagonal head 911 of the expansion sleeve 91 and the expansion core shaft 90 is turned, 90 is ejected rearward, the expansion claw 912 at the front end of the expansion sleeve 91 is pushed and expanded by the expansion head 901 of the expansion shaft 90, the hole wall in the hole 94 is supported, and the spanner is fitted to the hexagon head 920 of the adjustment tube 92. When the adjusting tube 92 is screwed into the hole 94, the wall nail structure is fixed in the hole 94. When operated in reverse, the wall nail structure can be removed from the hole 94 by removing the expansion shaft 90, the expansion sleeve 91 and the adjustment tube 92.

  However, the wall nail structure after this improvement has a structure that is removed in the opposite direction and can be used repeatedly, but the components that make it up are more than the conventional wall nail structure that cannot be removed. For this reason, the member cost is increased, and the number of assembling steps is large and time-consuming. Therefore, a technique for improving the above-described problems and disadvantages has been demanded.

A main object of the present invention is to provide a wall nail structure that is easy to use because the number of parts constituting the wall nail is small and the member cost is low.

In order to solve the above-described problem, according to a first embodiment of the present invention, a wall nail structure including an expansion sleeve and an expansion shaft is provided, and the expansion sleeve is internally threaded from one end inward in the axial direction. A tapered conical groove with a gradually decreasing width is formed at the bottom of the female threaded portion, and the groove bottom of the conical groove is located substantially on the axis of the expansion sleeve, The other end is provided with a plurality of claw portions that are expanded or retracted by being pushed apart, and the claw portions are separated by a plurality of axial separation grooves, and the separation grooves are formed on the expansion sleeve. It intersects at the intersecting portion on the axis, and the intersecting portion is inserted into the groove bottom of the conical groove, and around the expansion sleeve, at one end where the claw portions are not provided, A plurality of ribs are provided so that each rib is outside the periphery of the expansion sleeve. The expansion core shaft has a male screw portion, and when the male screw portion is screwed into the female screw portion of the expansion sleeve, it is displaced in the axial direction within the expansion sleeve, and the male screw portion of the expansion core shaft is It has a swivel head at one end, a support part at the other end, the support part has a conical shape, a conical surface is formed, a distal end is formed into a pointed end, and the support part is the expansion core. When pivoted by a shaft, the expansion sleeve is displaced to reach the conical groove, and the tip is continuously inserted to the intersection of the groove bottom of the conical groove of each separation groove, When the conical surface moves along the wall surface of the conical groove of the inflatable sleeve, each nail portion is spread and provided.

  It is preferable that the engagement structure is sequentially arranged in the axial direction on the surface of each of the claw portions of the expansion sleeve.

  In the engagement structure, it is preferable that a plurality of annular convex portions and a plurality of annular concave portions provided in the radial direction are sequentially crossed on the claw portions.

  It is preferable that a stop ring is provided at the bottom of the head, and a tooth-like non-slip portion is provided at the bottom of the stop ring.

The wall nail structure of the present invention is easy to use because the number of parts constituting the wall nail is small and the member cost is low.

FIG. 1 is a perspective view showing a wall nail structure according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a wall nail structure according to an embodiment of the present invention. FIG. 3 is a longitudinal sectional view showing a wall nail structure according to an embodiment of the present invention. FIG. 4 is a cross-sectional view showing a wall nail structure according to an embodiment of the present invention. FIG. 5 is an explanatory diagram of a usage state in which the support portion of the wall nail structure according to an embodiment of the present invention pushes each nail portion apart. FIG. 6 is an explanatory diagram of a use state in which the support portion of the wall nail structure according to the embodiment of the present invention pushes back each nail portion. FIG. 7 is an exploded perspective view of a conventional wall nail structure. FIG. 8 is an assembled cross-sectional view of a conventional wall nail structure.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Note that the present invention is not limited thereby.

  Please refer to FIG. As shown in FIG. 1, a wall nail structure according to an embodiment of the present invention includes at least an expansion sleeve 1 and an expansion core 2, and is screwed to a workpiece 3.

  Please refer to FIG. 2 and FIG. As shown in FIGS. 2 and 3, the expansion sleeve 1 is formed with a female screw portion 10 inward from one end in the axial direction. A tapered conical groove 11 whose width gradually decreases is formed at the bottom of the female screw portion 10. The groove bottom of the conical groove 11 is positioned substantially on the axis of the expansion sleeve 1. A plurality of claw portions 12 are provided at the other end of the expansion sleeve 1. The claw portions 12 are separated by a plurality of axial separation grooves 13. Each separation groove 13 intersects on the axis of the expansion sleeve 1. The intersecting portion is inserted into the groove bottom of the conical groove 11.

  Around the expansion sleeve 1, a plurality of ribs 14 project from one end where the claw portions 12 are not provided. The ribs 14 extend outward from the periphery of the expansion sleeve 1, and the engagement structures 15 are sequentially arranged in the axial direction on the surface of each claw portion 12 of the expansion sleeve 1. In the engagement structure 15 of the present embodiment, a plurality of annular convex portions 150 and a plurality of annular concave portions 151 that are circumferentially arranged in the radial direction are sequentially crossed on each claw portion 12.

  The expansion shaft 2 has a male screw portion 20, and the male screw portion 20 is screwed into the female screw portion 10 of the expansion sleeve 1 to be displaced in the axial direction within the expansion sleeve 1. The male screw portion 20 of the expansion shaft 2 has a turnable head portion 21 at one end and a support portion 22 at the other end. The support portion 22 has a conical shape, a conical surface 221 is formed, and a distal end is formed into a tip 220. When the support portion 22 is pivoted by the expansion shaft 2, the support portion 22 is displaced to reach the conical groove 11 of the expansion sleeve 1, and each claw portion 12 of the expansion sleeve 1 is expanded or retracted to return.

  A stop ring 23 is provided at the bottom of the head 21. A tooth-like non-slip portion 230 is provided on the bottom surface of the stop ring 23 and is in contact with the workpiece 3 via the anti-slip portion 230, so that a frictional force between the work piece 3 and the workpiece 3 is not fixed. Therefore, the expansion core 2 is prevented from turning and loosening.

  Please refer to FIG. As shown in FIG. 3, when using the wall nail of this embodiment, first, the expansion sleeve 1 is installed in a hole drilled in the wall surface, and each rib 14 protruding from the expansion sleeve 1 pushes against the wall in the hole. Each of the ribs 14 prevents the expansion sleeve 1 from pivoting when the expansion core 2 is pivoted by being applied and positioned (see FIGS. 3 and 4).

  Please refer to FIG. As shown in FIG. 5, when the expansion sleeve 1 is positioned in the hole, when the expansion shaft 2 of the head 21 is turned by a tool, the male screw portion 20 of the expansion shaft 2 is turned into the female screw portion 10 of the expansion sleeve 1. Begins to be screwed into. The support portion 22 of the expansion core 2 is displaced in the axial direction until reaching the conical groove 11 of the expansion sleeve 1. When the expansion core 2 is screwed again, the support portion 22 is continuously inserted by the pointed end 220 to the intersection A at the groove bottom of the conical groove 11 of each separation groove 13 (see the intersection A in FIG. 4). In the support portion 22, the conical surface 221 moves along the wall surface of the conical groove 11 of the expansion sleeve 1 to spread each claw portion 12. Each nail | claw part 12 is pressed against the wall in a hole via the engagement structure 15 provided in the surface, fixes a wall nail firmly in a hole, and fixes the workpiece 3. FIG.

  Please refer to FIG. As shown in FIG. 6, when removing the wall nail from the hole, first, the expansion shaft 2 is loosened, and the support portion 22 of the expansion shaft 2 is released from the conical surface 221 by each claw portion 12 and pulled in. Therefore, the claw portions 12 are not pressed against the wall of the hole, and at this time, the male screw portion 20 of the expansion shaft 2 is still locked to the female screw portion 10 of the expansion sleeve 1 and positioned. The whole can be easily extracted from the hall.

  As can be seen from the above description, the wall nail structure of the present invention is composed only of the expansion sleeve 1 and the expansion shaft 2, so that the wall nail is assembled with simple parts compared to the conventional wall nail structure. In addition to being able to fix the object, the cost of the parts is low, and the parts can be quickly assembled, removed after being assembled, and the wall nails and wall surfaces can be prevented from being damaged.

The preferred embodiments of the present invention have been disclosed as described above so that those skilled in the art can understand them, but these do not limit the present invention in any way. Various changes and modifications can be made without departing from the spirit and scope of the present invention. Accordingly, the scope of the utility model registration claim of the present invention should be broadly interpreted including such changes and modifications.

DESCRIPTION OF SYMBOLS 1 Expansion sleeve 2 Expansion core shaft 3 Workpiece 10 Female thread part 11 Conical groove 12 Claw part 13 Separation groove 14 Rib 15 Engagement structure 20 Male thread part 21 Head part 22 Support part 23 Stop ring 90 Expansion core shaft 91 Expansion sleeve 92 Adjustment pipe 93 nut 94 hole 150 annular convex portion 151 annular concave portion 220 pointed end 221 conical surface 230 non-slip portion 900 male screw 901 expansion head 910 male screw 911 hexagon head 912 expansion claw 920 hexagon head A crossing portion

Claims (4)

A wall nail structure with an expansion sleeve and an expansion core,
The expansion sleeve is formed with an internal thread portion from one end inward in the axial direction, and a tapered conical groove having a gradually decreasing width is formed at a bottom portion of the internal thread portion. A plurality of claw portions that are positioned substantially on the axial center of the expansion sleeve and that are pushed out and pulled back are provided at the other end of the expansion sleeve, and a plurality of axial separation grooves are provided between the claw portions. Each of the separation grooves intersects at an intersecting portion on the axial center of the expansion sleeve, and the intersecting portion is inserted into the groove bottom of the conical groove,
Around the expansion sleeve, a plurality of ribs protrude from one end where the claw portions are not provided, and the ribs extend outward from the periphery of the expansion sleeve,
The expansion shaft has a male screw portion, and when the male screw portion is screwed into the female screw portion of the expansion sleeve, the expansion screw is displaced in the axial direction within the expansion sleeve, and the male screw portion of the expansion shaft is rotatable. It has a head at one end, a support part at the other end, the support part has a conical shape, a conical surface is formed, a distal end is formed into a pointed tip, and the support part pivots around the expansion core. Then, the expansion sleeve is displaced to reach the conical groove, and the tip is continuously inserted to the intersecting portion of the conical groove of each of the separation grooves, and the conical surface of the support portion. The nail structure is characterized in that each of the claw portions is pushed and spread when moved along the wall surface of the conical groove of the expansion sleeve.   2. The wall nail structure according to claim 1, wherein engagement structures are sequentially arranged in an axial direction on a surface of each of the claw portions of the expansion sleeve.   3. The wall nail according to claim 2, wherein the engagement structure includes a plurality of annular protrusions and a plurality of annular recesses arranged in a radial direction and sequentially crossing each nail part. Construction. A stop ring is provided at the bottom of the head,
The wall nail structure according to claim 1, wherein a tooth-like non-slip portion is provided on a bottom surface of the stop ring.

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