TWM579688U - Expansion screw - Google Patents

Abstract

A sleeve type screw comprising a sleeve and a screw, the sleeve comprising a hollow tube body, wherein a plurality of limiting members are formed in a circumferential direction of the inner wall of the hollow tube body, and the plurality of limiting members are from the middle The inner wall of the hollow pipe protrudes toward the center of the hollow pipe body and protrudes toward the opening of the screw, so that each of the limiting members is formed with an arc portion which is bent toward the opening of the screw, and the screw is disposed in the hollow pipe. In the body, when the screw has one end of the threaded portion from the screw into the opening and enters the sleeve and moves toward the screw outlet opening through the screw insertion space, the plurality of limiting members are pressed by the thread of the threaded portion and are screwed away The opening is bent, and after the thread portion passes through the plurality of limiting members, the plurality of limiting members are restored to their original shape and abut against the non-threaded portion of the screw to retain the screw in the sleeve.

Description

Casing screw

This creation is about a type of screw, especially about a sleeve type screw.

Casing screws have the advantage of tethering and are commonly used on pre-assembled large parts such as buildings, street lights or car engines for quick assembly.

The structure of the sleeve type screw mainly comprises a sleeve and a screw, and the screw is inserted into the sleeve from one end of the sleeve and inserted into the other end of the sleeve, and the screw head at one end of the screw is exposed casing.

However, since the conventional sleeve type screw does not particularly tether the arrangement between the screw and the sleeve, the screw provided in the sleeve has the possibility of being easily pulled out of the sleeve. Accordingly, conventional sleeve screws have the need for improvement.

Therefore, the purpose of this creation is to provide a sleeve type screw that allows the screw to be retained in the sleeve.

The present invention provides a sleeve type screw for solving the problems of the prior art, comprising: a sleeve comprising a hollow tube body and a screw insertion opening disposed at two ends of the hollow tube body And a screw exiting the opening, a plurality of limiting members are formed in a circumferential direction of the inner wall of the hollow tubular body, and the plurality of the limiting members are from the inner wall of the hollow tubular body to the hollow tubular body a center of the screw protrudes from the opening direction of the screw, such that each of the limiting members is formed with an arc portion bent toward the opening of the screw, and the plurality of the limiting members are coaxially surrounded by a screw. And a screw disposed in the hollow tube body, one end of the screw is formed with a threaded portion, wherein the screw has one end of the threaded portion from the screw inlet opening into the sleeve and the screw When the opening opening moves through the screw insertion space, the plurality of the limiting members are pressed by the thread of the threaded portion to bend toward the screw leaving opening, and the plurality of the limiting portions are passed through the threaded portion. After the piece, a plurality of the limit pieces are restored to the original condition The non-threaded region of the screw to the screw to remain limited to the sleeve.

In a sleeve type screw according to an embodiment of the present invention, the screw includes a screw head, a flange and a screw, and one end of the screw is formed with the threaded portion, and the other end of the screw is provided with the screw head And the flange, the flange is located between the screw head and the threaded portion.

In the sleeve type screw of one embodiment of the present invention, the screw head and the flange of the screw are exposed outside the opening of the screw.

In a sleeve type screw according to an embodiment of the present invention, the sleeve includes a flange attachment portion formed at a periphery of the screw insertion opening, the flange attachment portion being a flange adapted to the screw, The flange of the screw is attached to the flange attachment portion.

In the sleeve type screw of one embodiment of the present invention, the plurality of the limiting members are disposed adjacent to the screw opening opening in comparison with the screw opening opening.

In the sleeve type screw of an embodiment of the present invention, a plurality of the limit members are located on the same horizontal plane.

In the sleeve type screw of an embodiment of the present invention, the limiting member is a metal limiting member.

Through the technical means adopted by this creation, when the screw enters the sleeve from the screw into the opening and moves toward the screw opening and exiting the space through the screw, the limiting piece in the sleeve is pressed by the screw thread and opens to the opening. The direction is bent, and after the threaded portion of the screw completely passes through the stopper, the stopper is reset and abuts against the non-threaded portion of the screw to retain the screw in the sleeve. Through the characteristics of the screws in the sleeve, the multiple sleeve screws can be quickly locked on the large structure at the same time.

Embodiments of the present creation will be described below based on Figs. 1 to 4 . This description is not intended to limit the implementation of the present invention, but is one of the embodiments of the present invention.

As shown in FIGS. 1 to 4, a sleeve type screw 100 according to an embodiment of the present invention includes a screw 1 and a sleeve 2.

As shown in FIG. 2, in the present embodiment, the screw 1 includes a screw head 11, a flange 12, and a screw 13. A peripheral wall of one end of the screw 13 is outwardly convex to form a threaded portion 14. The other end of the screw 13 is provided with the screw head 11 and the flange 12, and the flange 12 is located between the screw head 11 and the threaded portion 14. In detail, the flange 12 is a disc body extending from the other end of the screw 13, and is connected to the screw head 11. In the embodiment, the screw head 11 is a hexagonal screw head.

The sleeve 2 is a metal sleeve. As shown in FIG. 2 and FIG. 4 , the sleeve 2 includes a hollow tubular body 22 and a screw insertion opening disposed at two ends of the hollow tubular body 22 . 21 and a screw exit the opening 23. In detail, the sleeve 2 further includes a flange attachment portion 24 formed on the periphery of the screw insertion opening 21 and adapted to the flange 12 of the screw 1 for the flange 12 of the screw 1 Fit together.

The material of each of the limiting members 25 is selected from a metal, and a plurality of the limiting members 25 are formed in the circumferential direction of the inner wall of the hollow tubular body. In detail, the plurality of the limiting members 25 protrude from the inner wall of the hollow tubular body 22 toward the center of the hollow tubular body 22 and away from the opening 23 of the screw, so that each of the limiting positions The member 25 is formed with an arc portion 251 which is bent toward the screw opening opening 23, and the plurality of the limiting members 25 collectively enclose a screw insertion space S as shown in FIG. Preferably, the plurality of the limiting members 25 are disposed adjacent to the screw opening opening 21 in comparison with the screw opening opening 23, and the plurality of the limiting members 25 are located on the same horizontal plane.

With the fourth figure, the screw 1 has one of the threaded portions 14 entering the opening 2 from the screw insertion opening 21 and moving toward the screw opening opening 23 to pass through the screw insertion space S. The stopper 25 is bent by the thread of the threaded portion 14 and bent toward the screw opening opening 23. After the threaded portion 14 passes through the plurality of the limiting members 25, the plurality of the limiting members 25 are restored to the original shape and abut against the non-threaded region of the screw 1 to retain the screw 1 to the sleeve 2 in.

The above description and description are only illustrative of the preferred embodiments of the present invention, and those having ordinary skill in the art may make other modifications in accordance with the scope of the patent application as defined below and the above description, but such modifications are still It is the creative spirit of this creation and is within the scope of this creation.

100‧‧‧Sleeve type screws

1‧‧‧ screws

11‧‧‧ screw head

12‧‧‧Flange

13‧‧‧ screw

14‧‧‧Threading Department

2‧‧‧ casing

21‧‧‧ Screw entry opening

22‧‧‧ hollow body

23‧‧‧ Screw outlet

24‧‧‧Flange Attachment

25‧‧‧Limited parts

251‧‧‧Arc

S‧‧‧screw space

1 is a perspective view showing a sleeve type screw according to an embodiment of the present creation;  2 is a schematic exploded view showing a bushing screw according to an embodiment of the present creation;  Figure 3 is a top plan view showing a sleeve of a telescopic screw according to an embodiment of the present invention;  Figure 4 is a cross-sectional view showing a sleeve type screw according to an embodiment of the present creation;  

Claims (7)

A sleeve type screw comprising:  a sleeve comprising a hollow tube body, a screw insertion opening disposed at two ends of the hollow tube body, and a screw outlet opening, wherein a plurality of circumferential lines of the inner wall of the hollow tube body are formed a limiting member, wherein the plurality of the limiting members protrude from an inner wall of the hollow tubular body toward a center of the hollow tubular body and away from the opening of the screw, so that each of the limiting members is formed Opening the arc of one of the arcs of the opening toward the screw, and the plurality of the limiting members jointly enclose a screw insertion space;  a screw disposed in the hollow tube body, one end of the screw is formed with a threaded portion,  Wherein the plurality of the limiting members are subjected to the threaded portion when the screw has one end of the threaded portion from the screw entering the opening and entering the sleeve and moving toward the screw opening opening through the screw insertion space; Squeezing the thread to bend toward the screw opening opening, and after the thread portion passes through the plurality of the limiting members, the plurality of the limiting members are restored to the original shape and abut against the non-threaded region of the screw to The screw is retained in the sleeve.   The sleeve type screw according to claim 1, wherein the screw comprises a screw head, a flange and a screw, and one end of the screw is formed with the threaded portion, and the other end of the screw is provided with the screw head and The flange is located between the screw head and the threaded portion. The sleeve type screw of claim 2, wherein the screw head and the flange of the screw are exposed outside the opening of the screw. The sleeve type screw according to claim 3, wherein the sleeve includes a flange attachment portion formed at a periphery of the screw insertion opening, the flange attachment portion being a flange adapted to the screw The flange for the screw is attached to the flange attachment portion. The sleeve type screw of claim 1, wherein the plurality of the limiting members are disposed adjacent to the screw opening opening in comparison with the screw opening opening. The casing type screw of claim 1, wherein the plurality of the limiting members are located on the same horizontal plane. The sleeve type screw of claim 1, wherein the limiting member is a metal limiting member.