TWM470175U - Inner threaded anchor - Google Patents

Description

Internal threaded anchor

The present invention relates to a bolt, and more particularly to an internal threaded anchor.

As shown in FIG. 1 , it is a conventional expansion screw 1 , which mainly comprises an outer tip shell 11 and an inner tip 12 . The outer tip shell 11 is a hollow round tube body provided with a perforation 111 , and the outer tip shell 11 The lower section is provided with an internal thread 112. The outer end of the outer tip shell 11 is provided with a receiving portion 113 and at least one or more gaps 114 are equally spaced around the outer edge. The inner tip 12 is a tapered short cylindrical rigid body member.

In use, usually, most of the expansion screws 1 are driven into the holes 211 of the RC wall 21 to prepare for hanging a fixture 22 (such as an air conditioning duct, a wire trough, etc.), and each expansion screw 1 is fixed. The first step is to first place the inner tip 12 on the receiving portion 113 of the outer tip shell 11, and use the gunpowder nailer (not shown) or a hammer (not shown) to connect the outer tip shell 11 and the inner tip 12 The inner tip 12 is inserted into the hole 211 of the RC wall 21, and the inner tip 12 is restricted by the inner wall surface of the hole 211 of the RC wall 21, and one end of the outer tip shell 11 provided with the gap 114 is opened and abuts against the RC wall 21. The hole wall of the hole 211. Then, one end of the plurality of screws 23 is respectively screwed with the internal threads 112 of the outer tip shells 11 After being fixed, a support frame 24 is disposed at each of the contours of the screws 23 to be locked with a plurality of nuts 25, so that the fixtures 22 to be fixed can be placed on the support frames 24.

However, in actual use, it is found that the surface of the inner tip 12 is smooth, and only the outer wall surface of the expanded end is pressed against the hole wall of the hole 211 of the RC wall 21, which is easy to be used for the fixing member 22, the support frame 24 and If the weight of the screws 23 is excessively applied, the slippage occurs, and even the fixtures 22, the support frames 24 or the screws 23 are dropped. If the expansion screws 1 are used in a public place, the public is more harmful to the public. The key to safety.

Therefore, the creator of the present invention has applied to the bureau for a self-tapping self-tapping anchor. The application number is 102213046. Referring to FIG. 2, the internal self-tapping anchor 3 includes a screw head 31 and a The screw portion 32 to which the screw head 31 is connected. The screw head 31 has a threaded groove 311 extending in the axial direction. The screw portion 32 has a shaft 321 and a screw 322 spirally wound around the shaft 321 . The shaft 321 has a diameter of 5.95 to 6.2 mm, and the screw 322 has an outer diameter of 8 to 8.22 mm. And the pitch of the screw 322 is 6.25 to 6.45 mm. In use, when most of the internal self-tapping anchors 3 are respectively positioned, a plurality of screws 41 are screwed with one end of the threaded slots 311 of the internal self-tapping anchors 3, and are suspended with a plurality of nuts 43 A carrier 42 is suspended for carrying a wire tray, an air conditioning duct waiting for the positioning member 44 (shown as an imaginary line in the figure).

The structural design of the internal tooth self-tapping anchor 3 has the advantages of good overall structural strength, and is not easy to be separated from the wall of the building, and can provide a good load-bearing effect. However, the creator found that the thread groove 311 only extends axially. Inside the screw head 31, the combined length of the screw 41 that is screwed to the phase is short, and the overall bearing capacity still has a progressive space.

Therefore, the purpose of the present invention is to provide an internally threaded anchor bolt that is easy to assemble and has a good load effect.

Thus, the novel internal threaded anchor bolt comprises a screw head, a screw portion connected to the screw head, and a joint portion. The screw portion has a shaft and a screw threaded around the rod body. The engaging portion has a passage extending from the screw head toward the screw portion, and an internal thread formed on the inner wall surface of the passage, the length of the passage being less than or equal to 1/2 of the length of the screw portion.

The utility model has the advantages that in use, when a majority of the internal threaded anchor bolts are screwed to a predetermined positioning hole of a wall of a building, a plurality of screws are passed through the passage at one end and simultaneously screwed with the internal thread. Then, a carrier is suspended by the screws for carrying the wire rack, the air conditioning duct, and waiting for the positioning object. Since the depth of the screw deep into the internal threaded anchor bolt is increased, not only the overall structural strength is good, but also the bearing capacity of the overall structure can be improved, and a good load effect is provided.

5‧‧‧ internal threaded anchor

51‧‧‧ screw head

52‧‧‧ Screw Department

521‧‧‧ shaft

522‧‧‧ threaded teeth

523‧‧‧ Upper edge

524‧‧‧ lower margin

53‧‧‧ joints

531‧‧‧ channel

532‧‧‧ internal thread

54‧‧‧Hua Department

541‧‧‧ first surface

542‧‧‧ second surface

543‧‧‧Anti-loose teeth

61‧‧‧ wall

611‧‧‧Positioning holes

71‧‧‧ screw

72‧‧‧ Carrier

73‧‧‧ nuts

74‧‧‧Objects to be positioned

Θ‧‧‧ angle

L‧‧‧ length

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a sectional view showing a use of a conventional expansion screw; FIG. 2 is a sectional view showing The creator of this novel was previously applied Please refer to the use form of "inner-tooth self-tapping anchor" of No. 102213046; FIG. 3 is a perspective view showing a preferred embodiment of the internal tooth-type threaded anchor; FIG. 4 is a bottom view, an auxiliary explanatory view 3; FIG. 5 is a cross-sectional view, which assists in explaining FIGS. 3 and 4, which shows that the length of the passage of a joint portion is less than 1/2 of the length of the screw portion; FIG. 6 is a cross-sectional view showing the joint portion of the preferred embodiment. The length of the passage is equal to 1/2 of the length of the screw portion; and Fig. 7 is a schematic view showing the use of the internal threaded anchor shown in Fig. 5.

Referring to Figures 3, 4 and 5, a preferred embodiment of the internal internal threaded anchor 5 includes a screw head 51, a screw portion 52 coupled to the screw head 51, and a joint portion. 53. The screw portion 52 has a shaft 521 and a screw 522 spirally wound around the shaft 521. The engaging portion 53 has a passage 531 extending from the screw head 51 toward the screw portion 52, and an internal thread 532 formed on the inner wall surface of the passage 531. The length of the passage 531 is shorter than the length 1/2 of the screw portion 52. The thread 522 has an upper edge surface 523 and a lower edge surface 524, and the angle θ between the upper edge surface 523 and the lower edge surface 524 is preferably 45 degrees, but not limited thereto, of course, Change with demand. In addition, the internal threaded anchor bolt 5 can further include a washer portion 54 having a first surface 541 coupled to the screw head portion 51 and a first surface 541 opposite thereto. A second surface 542 that is coupled to the screw portion 52. The second surface 542 has a plurality of anti-loose teeth 543, the anti-loosening teeth 543 are continuously arranged in a ring shape.

Further, as shown in FIG. 6, the length of the passage 531 of the internal thread type screw anchor 5 may be equal to 1/2 of the length L of the screw portion 52.

Taking the inner tooth type screw anchor 5 as shown in FIG. 5 as an example, in use, as shown in FIG. 7, the majority of the internal thread type anchor bolts 5 are respectively screwed to the wall 61 of a building. In the plurality of preset positioning holes 611, one end of the plurality of screws 71 is passed through the passage 531 of the engaging portion 53 of the internal threaded anchors 5, and further screwed with the internal thread 532, and the other of the screws 71 At one end, a carrier 72 is disposed at the same time, and a plurality of nuts 73 are located under the carrier 72 and are respectively screwed on the other ends of the screws 71, so that the carrier 72 is suspended, so that one can be used. For example, the wire tray and the air conditioning duct wait for the positioning object 74 (shown as an imaginary line in the figure) to be placed on the carrier 72.

As the depth of the internal threaded bolts 5 is increased, the screw 71 can increase the bonding force between the screws 71 and the internal threaded anchors 5, and then match the threads 522. The angle θ between the edge surface 523 and the lower edge surface 524 is 45 degrees, and the anti-loosening teeth 543 are designed such that the engagement of each of the internal threaded anchor bolts 5 with the positioning holes 611 of the wall 61 is screwed. The effect is more compact and stable, so not only the overall structural strength is good, but also the bearing capacity of the overall structure can be improved, and a good load effect is provided.

Similarly, the use mode of the internal thread type anchor bolt 5 shown in FIG. 6 is the same as that of the above-mentioned FIG. 7, and therefore will not be further described herein, and particularly, the internal tooth type shown in FIG. The length of the passage 531 of the threaded anchor 5 is longer, and therefore, the depth of engagement with the screw 71 is increased, and the overall structure is The bearing capacity is further improved and the load effect is better.

In summary, the above-mentioned internal toothed screw anchor 5 is designed to increase the depth of the threaded screw 71 deep into the internal threaded anchor bolt 5, thereby enhancing the combination with the screw 71. Force, not only the overall structural strength is good, and can improve the bearing capacity of the overall structure, providing a good load effect, so it can achieve the purpose of this new type.

However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the patent specification, All remain within the scope of this new patent.

5‧‧‧ internal threaded anchor

51‧‧‧ screw head

52‧‧‧ Screw Department

521‧‧‧ shaft

522‧‧‧ threaded teeth

523‧‧‧ Upper edge

524‧‧‧ lower margin

53‧‧‧ joints

531‧‧‧ channel

532‧‧‧ internal thread

54‧‧‧Hua Department

541‧‧‧ first surface

542‧‧‧ second surface

543‧‧‧Anti-loose teeth

Θ‧‧‧ angle

L‧‧‧ length

Claims (4)

An internal tooth type threaded anchor includes: a screw head; a screw portion connected to the screw head, the screw portion having a shaft, and a screw threaded around the rod body; and a joint The portion has a passage extending from the screw head toward the screw portion, and an internal thread formed on the inner wall surface of the passage, the length of the passage being less than or equal to 1/2 of the length of the screw portion. The internal threaded anchor bolt according to claim 1, further comprising a spar portion formed between the screw head portion and the screw portion, the Chinese portion having a first surface connected to the screw head portion And a second surface opposite the first surface and coupled to the screw portion, the second surface having a plurality of anti-loosening teeth. The internal thread type anchor bolt according to claim 2, wherein the anti-loosening teeth are continuously arranged in a ring shape. The internal thread type anchor bolt according to claim 3, wherein the thread has an upper edge surface and a lower edge surface, and an angle between the upper edge surface and the lower edge surface is 45 degrees.