CN203500228U - Internal threaded anchor - Google Patents

Abstract

An internal thread type screw anchor bolt comprises a screw head part, a screw rod part connected with the screw head part and a joint part. The screw part is provided with a screw body and a screw thread spirally surrounding the screw body. The joint part is provided with a channel extending from the screw head part to the screw part and an internal thread formed on the inner wall surface of the channel, and the length of the channel is less than or equal to 1/2 of the screw part. Therefore, the combined length of the matched screw and the inner tooth type threaded anchor bolt is increased, the strength of the whole structure is good, the bearing capacity of the whole structure can be improved, and a good loading effect is provided.

Description

Internal threaded anchor

technical field

The utility model relates to an anchor bolt, in particular to an internal thread thread anchor bolt.

Background technique

As shown in Figure 1, it is a traditional expansion screw 1, which mainly includes an outer tip shell 11 and an inner tip 12, and the outer tip shell 11 is a hollow cylindrical body provided with a perforation 111, the outer tip shell The lower section of 11 is provided with internal thread 112, and the upper end of the outer tip shell 11 is provided with accommodating portion 113 and at least one gap 114 is provided on the outer edge equidistantly. And the inner tip 12 is a tapered short cylindrical rigid body object.

In use, usually a plurality of expansion screws 1 are driven into the hole 211 of an RC wall 21 to prepare for hanging a fixed part 22 (such as air-conditioning ducts, wire racks, etc.), and each expansion screw 1 The fixing method is to first place the inner tip 12 on the accommodating portion 113 of the outer tip shell 11, and use a powder nailer (not shown) or a hammer (not shown) to connect the outer tip shell 11 with the inner tip 12 are driven into the hole 211 of the RC wall 21 together, wherein the inner tip 12 is restricted by the inner wall surface of the hole 211 of the RC wall 21, and the end of the outer tip shell 11 provided with the gap 114 is stretched and pressed against the RC wall The hole wall of the hole 211 of 21. After one end of a plurality of screw rods 23 is respectively screwed and fixed with the internal thread 112 of the outer tip shell 11, a support frame 24 is respectively pierced at the same height position of the screw rods 23, and a plurality of nuts 25 are screwed in place. , so that the component 22 to be fixed can be placed on the support frame 24 .

However, in actual use, it is found that because the surface of the inner tip 12 is smooth, only relying on the outer wall surface of one end after it expands to be pressed against the hole wall of the hole 211 of the RC wall 21, it is easy to be fixed on the member 22 to be fixed, the support frame 24 and The screw rod 23 slips under the excessive weight of the screw rod 23, and even causes the fixed part 22, the support frame 24 or the screw rod 23 to fall. If the expansion screw 1 is used in a public place, it is more likely to endanger public safety. .

Therefore, the inventor of the utility model once proposed a patent application for "inner tooth type self-tapping anchor bolt" to the Intellectual Property Bureau of the Ministry of Economic Affairs, Taiwan, China, and the application number is 102213046. Referring to Fig. 2, this inner tooth type self-tapping anchor bolt 3 includes a screw head 31 and a screw rod 32 connected to the screw head 31. The screw head 31 has a thread groove 311 extending axially. The screw part 32 has a shaft 321 and a thread 322 spirally surrounding the shaft 321. The diameter of the shaft 321 is 5.95 to 6.2 mm, and the outer diameter of the thread 322 is 8 to 8.22 mm. And the pitch of the thread 322 is 6.25 to 6.45 mm. In use, when a plurality of internal thread self-tapping anchors 3 are respectively positioned, a plurality of screw rods 41 are used to screw one end with the thread groove 311 of the internal thread self-tapping anchor 3, and cooperate with a plurality of nuts 43 phase screw locks and suspend a carrier frame 42 for carrying—such as wire racks, air-conditioning air ducts and other positioning objects 44 (as shown by imaginary lines among the figures).

Although the structural design of the internal thread self-tapping anchor bolt 3 has the advantages of good overall structural strength, is not easy to break away from the wall of the building, and can provide good load effects, etc., the creator found that the thread groove 311 only extends axially. Inside the screw head 31 , the combined length with the screw 41 is relatively short, and the overall bearing capacity still has room for improvement.

Contents of the invention

The purpose of the utility model is to provide an internal thread threaded anchor bolt which is easy to assemble and has a good load effect.

The utility model internal thread threaded anchor bolt comprises a screw head and a screw rod connected to the screw head, the screw rod has a shaft and a thread spirally surrounding the shaft; The internal threaded anchor bolt also includes a junction, the junction has a channel extending from the screw head to the screw part, and an internal thread formed on the inner wall of the channel, the length of the channel is less than or equal to the screw rod 1/2 the length of the head.

The internal threaded anchor bolt of the utility model also includes a washer part formed between the screw head and the screw rod part, the washer part has a first surface connected to the screw head, and a Opposite to the first surface and the second surface connected with the screw part, the second surface has a plurality of anti-loosening protruding teeth.

In the internal threaded anchor bolt of the utility model, the anti-loosening convex teeth are continuously arranged in a ring shape.

In the internal threaded anchor bolt of the present invention, the thread has an upper edge surface and a lower edge surface, and the included angle between the upper edge surface and the lower edge surface is 45 degrees.

The beneficial effect of the utility model is that: in use, when a plurality of internal threaded anchor bolts are locked in the preset positioning holes of the wall of a building, a plurality of screw rods are matched with one end to pass through the passage and at the same time connect with the inner threaded anchor bolts. The threads are screwed together, and then a supporting frame is suspended by the screw for carrying objects such as wire troughs, air-conditioning ducts and other positioning objects. As the depth of the screw rod penetrated 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, providing a good load-bearing effect.

Description of drawings

Fig. 1 is a combined sectional view illustrating the use of a traditional expansion screw;

Fig. 2 is a combined sectional view, illustrating the usage of the creator of the utility model who applied for No. 102213046 "inner tooth type self-tapping anchor bolt" to the Intellectual Property Bureau of the Ministry of Economic Affairs of Taiwan, China;

Fig. 3 is a perspective view illustrating a preferred embodiment of the utility model internal threaded anchor bolt;

Fig. 4 is a bottom view, assisting in explaining Fig. 3;

Fig. 5 is a cross-sectional view, assisting in explaining Fig. 3 and 4, in which the channel length of a junction is shown to be less than 1/2 of the length of the screw part;

Fig. 6 is a sectional view illustrating that the passage length of a joint portion of the preferred embodiment is equal to 1/2 the length of the screw portion; and

FIG. 7 is a schematic view illustrating how the internal threaded anchor shown in FIG. 5 is used.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

Referring to Fig. 3, 4, 5, it is a preferred embodiment of the utility model internal tooth type threaded anchor bolt 5, comprising a screw head 51, a screw rod part 52 connected with the screw head 51, and a joint Section 53. The screw portion 52 has a shaft 521 and a thread 522 spirally wound around the shaft 521 . The engaging portion 53 has a channel 531 extending from the screw portion 51 to the screw portion 52 , and an internal thread 532 formed on an inner wall of the channel 531 . The length of the screw part 52 is L, and the length of the channel 531 is less than 1/2 of the length L of the screw part 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 it is not limited to this, and of course Changes can be made as needed. In addition, the internal threaded anchor bolt 5 may also include a washer part 54, the washer part 54 has a first surface 541 connected to the screw head 51, and a first surface 541 opposite to the first surface 541 and The second surface 542 connected with the screw part 52 . The second surface 542 has a plurality of anti-loosening protruding teeth 543 arranged continuously in a ring shape.

In addition, as shown in FIG. 6 , the length of the channel 531 of the internal threaded anchor bolt 5 may also be equal to 1/2 the length L of the screw portion 52 .

Taking the form of the internal threaded anchor bolt 5 shown in Figure 5 as an example, in use, as shown in Figure 7, by screwing a plurality of internal threaded anchor bolts 5 to the wall of a building In a plurality of preset positioning holes 611 of 61, one end of a plurality of screw rods 71 is used to pass through the channel 531 of the joint portion 53 of the internal threaded anchor bolt 5, and then screwed with the internal thread 532, the screw rod The other end of 71 passes through a bearing frame 72 again at the same time, is positioned at this bearing frame 72 below by means of a plurality of nuts 73 and is respectively screwed on the other end of described screw rod 71, makes bearing frame 72 be suspension state, like this That is, a positioning object 74 (shown as a phantom line in the figure) such as a wire rack and an air-conditioning duct is placed on the carrier frame 72 .

Since the depth of the screw 71 deep into the internal threaded anchor 5 is increased, the bonding force between the screw 71 and the internal threaded anchor 5 can be improved, and then the upper edge of the thread 522 can be matched. The angle θ between the surface 523 and the lower edge surface 524 is 45 degrees, and the design of the anti-loosening protruding teeth 543 makes the engagement and screw connection of each internal threaded anchor bolt 5 and each positioning hole 611 of the wall 61 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, providing a good load-bearing effect.

Similarly, the use of the internal threaded anchor bolt 5 shown in Figure 6 is the same as the description in Figure 7 above, so it will not be repeated here. The length of the channel 531 of the threaded anchor bolt 5 is longer, therefore, the combination depth with the screw rod 71 is increased, the bearing capacity of the overall structure is further improved, and the load effect is better.

In summary, the internal threaded anchor bolt 5 of the present utility model can increase the depth of the screw rod 71 that is matched with the threaded connection into the internal threaded anchor bolt 5 through the above-mentioned structural design, thereby enhancing the connection between the screw rod 71 and the screw rod 71. The bonding force not only has good overall structural strength, but also can improve the bearing capacity of the overall structure and provide a good load-bearing effect.

Claims (4)

1. a dentition formula screw thread crab-bolt in, comprises a spiral shell head, and a screw part being connected with this spiral shell head, and this screw part has a shaft, and spiral surrounding thread on this shaft; It is characterized in that: this interior dentition formula screw thread crab-bolt also comprises a joining portion, this joining portion has a passage being extended towards this screw part by this spiral shell head, and an internal thread that is formed at this vias inner walls face, the length of this passage is less than or equal to 1/2 length of this screw part.

2. interior dentition formula screw thread crab-bolt according to claim 1, it is characterized in that: this interior dentition formula screw thread crab-bolt also comprises a washer portion being formed between this spiral shell head and this screw part, this washer portion has a first surface being connected with this spiral shell head, and one in contrast to this first surface and the second surface that is connected with this screw part, this second surface has a plurality of locking double wedges.

3. interior dentition formula screw thread crab-bolt according to claim 2, is characterized in that: described locking double wedge is continuous arrangement in the form of a ring.

4. interior dentition formula screw thread crab-bolt according to claim 3, it is characterized in that: this thread has a upper limb face and a lower edge face, and the angle between this upper limb face and this lower edge face is 45 degree.

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