JPS59366Y2 - Connection device between foundation and foundation - Google Patents

Description

[Detailed explanation of the invention] This invention aims to firmly and reliably fix the anchor bolt and the foundation even if the positional accuracy of the anchor bolt planted in the foundation is somewhat poor. The present invention relates to a connecting device.

Traditionally, channel steel or angle steel has been used as the foundation in wooden pre-pub buildings, and anchor bolts have been used exclusively to connect these foundations to the foundation concrete, but the location of the anchor bolts If the accuracy of the anchor bolts was poor, it would be impossible to insert the anchor bolts into the bolt holes in the foundation, and the anchor bolts would have to be bent during construction, creating problems in terms of strength.

However, this idea predicts the error range of the anchor bolt position in advance, creates a bolt hole large enough to insert an anchor bolt within that error range, and also inserts a long and thin bolt between the bolt hole and the nut. By interposing a stop plate with a groove, it was possible to easily overcome the above-mentioned conventional problems.

That is, to explain this invention with reference to an embodiment, a bolt hole 4 of a channel steel foundation 3 is loosely fitted into an anchor bolt 2 planted in a foundation concrete 1.

The diameter of the bolt hole 4 is made relatively thick, taking into consideration the error in the anchor bolt installation position.

Next, a stop plate 6 is provided with bolt insertion grooves 5 radially from the center.
After fitting into the anchor bolt 2, the seat plate 7 is fitted and tightened with a nut 8.

In the above, a large number of knurls 9 are provided radially on the upper surface of the peripheral edge of the bolt hole 4, and knurls 10 are provided on the lower surface of the stop plate 6 on the surface that comes into contact with the knurls 9. A large number of knurls 11 are provided on the upper surface of the periphery of the insertion groove 5, and knurls 12 are also provided on the lower surface of the seat plate 7.

The knurls provided on each part are designed to prevent the base abutment surface from shifting after the nut is tightened.The shape, size, and number of knurls can be chosen as desired. A large number of microprotrusions can also be provided.

On the upper surface of the channel steel provided with the bolt holes, a projection 13 is provided concentrically on the periphery of the knurling to stop the movement of the stop plate.

In the embodiment described above, when the anchor bolt 2 is somewhat deviated from the predetermined position, it will protrude eccentrically from the center of the bolt hole.

Therefore, when fitting the stop plate 6 to the anchor bolt, the stop plate 6
is fitted into the inside of the protrusion 13 by turning it on the upper surface of the channel steel (for example, as indicated by the arrow 17 in FIG. 3).

Since the stop plate is provided with an anchor bolt insertion groove, by turning this, the bolt hole 4 and the stop plate 6 can be set concentrically (as shown in the third figure).

However, since the bolt insertion groove of the stop plate 6 is narrow (slightly wider than the outer diameter of the bolt), the nut can be easily and securely tightened using a normal seat plate.

Next, if the force applied to the connecting part is relatively small, such as in a one-story building, use a stop plate 15 with a normal-sized bolt hole 14 as shown in Figure 5, and use a double-barreled bolt hole (see 8.8 a). It can also be fixed by tightening.

Even in such a case, it is desirable to provide the knurling 16 on the back surface of the stop plate 15.

That is, according to this invention, when connecting a foundation anchor bolt with a pre-prepared bolt hole such as channel steel or angle iron, even if there is an error in the bolt placement position, the anchor bolt and foundation can be connected. This has the effect of making it possible to easily and reliably fix the parts, and to ensure the strength of the connecting part as designed.

Since the stress relationship between the base and the anchor bolt in the above is only for tension, the strength of the connection part is increased by making the thickness of the stop plate equal to or greater than that of the grooved outer silver, and by enlarging the anchor hole I. It is possible to prevent the decrease.

Furthermore, the shearing force caused by the horizontal force can be easily resisted by the protrusions and knurling around the anchor bolt hole provided in the base, such as channel steel.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of a conventional coupling device, and Figure 2 is a.
2 is an exploded enlarged perspective view of an embodiment of this invention, FIG. 2B is a back view of the seat plate, FIG. 2C is a back view of the stop plate, and FIG. FIG. 4 is a perspective view of a connected state, FIG. 5 is a perspective view of another embodiment, and FIG. 6 is a back view of the stop plate shown in FIG. 5. 1... Foundation concrete, 2... Anchor bolt, 3... Foundation, 4... Bolt hole, 5... Bolt insertion hole, 7... Seat board, 8... Nut, 9, 10, 11.12...
...Knurling, 13...Protrusion, 6...
...Stop plate.

Claims (1)

[Scope of utility model registration request] Taking into account the error range of the anchor bolt position on the foundation, a bolt hole whose diameter is sufficiently larger than the diameter of the anchor bolt is loosely fitted into the anchor bolt, and a radial hole is inserted into the anchor bolt from the center of the plate, which is larger than the bolt hole. A bolt insertion groove of a stop plate with a bolt insertion groove formed thereon is fitted into the stop plate, and a nut is screwed together and the entire body is tightened. A device for connecting a foundation and a foundation, characterized in that the edges of the stop plates are hooked to protrusions provided on the periphery of bolt holes.