JPH028003Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention relates to an anchor bolt that is fixedly attached by driving it into an object to be attached such as concrete or metal. This relates to an anchor bolt having an L-shape as a whole.

(Prior Art) As shown in FIG. 3, this type of conventional L-shaped anchor bolt 10 is curved from a single metal nail material by header processing, etc., so that the driving shaft part is straight. 11, a curved portion 12 exhibiting a curved arc shape from its base end, and a mounting piece portion 13 extending from this curved portion 12, forming an L-shape as a whole. Furthermore, the center line of the driving shaft portion 11 is offset toward the end of the curved portion 12, and the curved portion 12 is formed into a curved surface offset from the center line.

Incidentally, the driving shaft portion 11 is provided with a means for preventing it from coming off after driving, for example, an expanded portion 14 as shown in the drawing. As the expansion part 14, in addition to the structure in which a wedge member 16 for expansion is provided in the cutout part 15 as shown in the figure, examples of the expansion part 14 include the expansion leg piece of Utility Model Publication No. 53-20609 and the umbrella rib of Utility Model Publication No. 46-13869. It includes various shapes such as curved structures.

(Problem to be solved by the invention) When the driving shaft portion 11 of the L-shaped anchor bolt is driven by impact, the surface to be hit of the driving shaft portion 11 is deviated to the end of the curved portion 12. Therefore, accurate driving along the axial direction is not possible. That is, even if the impact is made in a straight line, the driving force is applied in a deflected manner as shown by the arrow in FIG. Therefore, there was a drawback that it did not provide a sufficient anchoring structure.

Furthermore, since the hit surface is curved and deviated, it is very difficult to hit it with a hammer or the like, making the driving process troublesome. In this case, since hitting the attachment piece 13 leads to bending and breakage, a small spot at the base end of the attachment piece slightly deviated from the axis center line had to be found as the impact spot 17. However, in order to apply a striking force along the shaft centerline from the curved hitting spot 17 deviated from the shaft centerline, a high degree of skill is required in determining the hitting angle and the like.

Furthermore, in actual field work, the mounting piece 1
3, it was not possible to create a mounting structure in which the mounting piece 13 was bent toward the object to be mounted and separated. This has the disadvantage that the driving shaft part 11 cannot be formed long because it cannot be hit along the shaft center line, and the mounting space S' between the mounting piece part 13 and the surface of the object C to be mounted cannot be formed large. This results in restrictions on the structure and type of the mounting member (not shown), such as the thickness.

In order to deal with the above-mentioned drawbacks, there is a method in which the anchor bolt 10 consisting of only the linear driving shaft part 11 is driven by impact from its base end face, and then the mounting piece is welded on-site to the base end face to integrate the anchor bolt 10. Conceivable. However, this method could not be used in practice because it required more time and effort in on-site welding work and increased costs.

However, the present invention was devised in order to eliminate the above-mentioned drawbacks, and is an L-shaped anchor bolt that is provided with a mounting piece so as to leave the proximal end surface of the shaft part so that it can be driven easily and accurately. Its purpose is to provide the following.

(Structure of the invention) In order to achieve the above object, the L-shaped anchor bolt according to the invention includes a driving shaft part that is fixed by driving into an object to be attached such as concrete, and a shaft base end surface of the driving shaft part. It consists of a mounting piece that extends integrally from the side of the shaft in an exposed state.

(Operation of the invention) After positioning the tip of the driving shaft by applying it to the object to be mounted, the base end surface of the driving shaft is struck. In this case, since the proximal end surface is formed as a plane on the axis center line,
By face-striking the proximal end surface, it is driven along the axial center line.

(Embodiment of the invention) Fig. 1 is a perspective view showing an embodiment of the L-shaped anchor bolt according to the invention, and Fig. 2 is a sectional view of the same side showing the bolted state.

The L-shaped anchor bolt 1 includes a driving shaft portion 2 that is fixed by driving into an object C such as concrete, and a driving shaft portion 2 that is integrally inserted from the side of the shaft with the shaft base end surface 4 of the driving shaft portion 2 exposed. It consists of an extended mounting piece part 3. The driving shaft portion 2 is linear and has a planar base end surface 5 formed along the shaft centerline at its base end.
Note that an expanded portion 6 is formed at the tip. 7 in the diagram
is a cut portion of the expansion portion 6, 8 is a retaining groove, and 9 is a wedge member for expanding the cut portion 7.

The mounting piece 3 is formed into an L-shape via a welded part 5 which is pre-integrated at a factory or the like on one side of the base end of the driving shaft 2, as shown in the figure. It may be configured to be thinner than the above.

According to the above configuration, after the tip of the driving shaft portion 2 is placed against the object C to be mounted and positioned, the base end surface 4 of the driving shaft portion 2 is struck. In this case, since the proximal end surface 4 is formed as a plane on the axis center line, the proximal end surface 4 can be flat-faced. By this surface driving, the driving shaft portion 2 is driven along the shaft center line, and the cut portion 7 of the expanded portion 6 is driven in.
are expanded and fixed by the wedge member 9 to prevent them from coming off. In this state, the mounting piece 3 is separated from the object C to be mounted, thereby forming a wide mounting space S.

According to the above embodiment, since they are integrated via the welded portion 5, any member can be selected as the mounting piece portion 3. For example, by integrating a small-diameter member, a male threaded member, etc., it is possible to expand the mounting methods and uses of the mounting member (not shown).

In the above-mentioned embodiment, the structure in which the mounting piece 3 is attached to the driving shaft 2 via the welded part 5 has been described, but this can also be implemented with an integrally molded product, etc., as long as the proximal end surface 4 is formed in advance. .

(Effects of the invention) As explained above, the L-shaped anchor bolt according to the invention provides the following effects.

Since the L-shaped anchor bolt can be driven along the shaft center line using the exposed shaft base end surface as a striking surface, the anchor can be firmly fixed without any deviation in driving.

Not only can the base end surface of the shaft be used as a striking spot to accurately perform surface hammering, but also the base end surface can be easily hammered into the surface, simplifying field work.

Since it can be driven in a straight line, it is possible to drive even if the driving shaft is long, and it is also possible to set a wide mounting space between the object and the mounting piece, making it possible to use various mounting members. Can be installed.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an embodiment of the L-shaped anchor bolt according to the present invention, Figure 2 is a sectional view of the same side showing the driving state, and Figure 3 shows the conventional L-shaped anchor bolt in the driving state. FIG. DESCRIPTION OF SYMBOLS 1... L-shaped anchor bolt, 2... Driving shaft part, 3... Mounting piece part, 4... Base end surface, 5... Welding part, C... Mounting object, S... Mounting space.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A driven shaft that is fixed by being driven into an object to be attached such as concrete, and an integral part from the side of the shaft with the shaft base end surface of this driven shaft exposed. An L-shaped anchor bolt consisting of an extended mounting piece. (2) An L-shaped anchor bolt whose mounting piece is integrally welded in advance, as set forth in claim 1 of the utility model registration.