JPH0552319U - Bolt extension structure - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to an extension structure of a bolt used in a construction site, a construction site or the like, and an object thereof is to provide a simple and safe extension structure of a bolt. [Structure] A bolt extension structure formed by connecting two or more bolts, wherein two or more bolts are connected through an extension tool formed by connecting at least two nuts in a plane. is there.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an extension structure of a bolt used at a construction site, a construction site, or the like.

[0002]

[Prior Art]

 Conventionally, as an extension structure of this type of bolt, for example, a hanging bolt is short and another bolt is connected in a ceiling ground hanging work place.

FIG. 5 shows an example in which another bolt 2 is connected to a suspension bolt 1 via a long nut 3 and extended. FIG. 6 shows an example in which another bolt 2 is welded 4 to the hanging bolt 1 and extended.

In either case, the suspension bolt 1 can be extended to a desired length by connecting another bolt 2 having a required length.

[0005]

[Problems to be solved by the device]

 However, in the case of FIG. 5, since the long nut 3 is used, the length adjustment interval is small, which is inconvenient.

[0006] Furthermore, it is not possible to visually check the bolting margin, which is unsafe. Further, there is a problem that when the long nut 3 is tightened, the nuts rotate together. On the other hand, in the case of FIG. 6, because of welding 4, there was a problem in strength.

In addition, it is necessary to set up the welder and it is dangerous because a firearm is used at a work place. The present invention has been made to solve such conventional problems, and an object thereof is to provide a simple and safe bolt extension structure.

[0008]

[Means for Solving the Problems]

 The bolt extension structure according to the present invention is a bolt extension structure formed by connecting two or more bolts, wherein two or more bolts are connected through an extension tool formed by connecting at least two nuts in a plane. It is formed by connecting.

[0009]

[Action]

 In the present invention, for example, when the length of the bolt becomes insufficient during the operation of suspending the ceiling substrate, or when the leveling of the bolt is performed, the tip of the hanging bolt constitutes an extension tool. The desired length can be achieved by screwing one nut and another nut with another extension bolt.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of a bolt extension structure according to the present invention, in which 10 denotes a suspension bolt.

The suspension bolt 10 is used for suspending a ceiling base. An extension tool 20 is screwed onto the tip portion 11 of the suspension bolt 10. A connecting bolt 12 for screwing into a predetermined length is screwed to the extension tool 20.

In the extension tool 20, as shown in FIG. 2, two hexagon nuts 21 and 22 are joined by welding by welding their one sides 21a and 22a so that they are in the same plane.

Further, the extension tool 20 may be one in which one metal plate is punched into a shape in which two hexagonal nuts are connected in a plane and two screw holes 21b and 22b are formed. Next, the operation of this embodiment will be described.

When the length of the suspension bolt 10 becomes insufficient during the operation of suspending the ceiling substrate, the tip portion 11 of the suspension bolt 10 is screwed into the screw hole 21b of one nut 21 constituting the extension tool 20. Then, it can be extended to a desired length by screwing the connecting bolt 12 into the screw hole 22b of another nut 22.

As described above, according to this embodiment, the tip end portion 11 of the hanging bolt 10 is screwed into the screw hole 21b of the one nut 21 constituting the extension tool 20, and then the extension tool 20 is fixed. Since the length of the suspension bolt 10 can be extended to a predetermined length by screwing the connecting bolt 12 into the screw hole 22b of another nut 22 in this state, it is possible to work in a short time. ..

Further, since the connecting bolt 12 is connected after the extension tool 20 is screwed into the tip portion 11 of the hanging bolt 10, the hanging amount of the bolt can be visually confirmed. Moreover, the length can be freely adjusted.

Further, compared with welding, it does not require a firearm and is safe. FIG. 3 shows another embodiment of the present invention. In the present embodiment, the extension tool 20 is screwed onto the tip 14 of the bolt 13 and then the level adjusting bolt 15 is screwed onto the extension tool 20.

According to the present embodiment, when the bolt 13 cannot reach the predetermined level, the extension tool 20 is attached to the tip portion 14 of the bolt 13 and the bolt 15 for adjusting the level is screwed into the bolt 13 to fix the predetermined level. The bolt 13 can be extended to the level.

FIG. 4 shows a modification of the extension tool 20 in which three hexagon nuts 21, 22, and 23 are connected in a plane. Also in this case, the same effects as those of the above embodiment can be obtained.

In each of the above-described embodiments, the extension structure of the bolt at the construction site has been described, but it can be similarly applied to the construction site.

[0021]

[Effect of the device]

 As described above, according to the present invention, an extension tool having a nut function is attached to the extension target bolt, and a bolt of a desired length is attached to the extension tool, whereby a bolt of a predetermined length can be obtained. You can work safely in a short time.

Further, since the connecting bolt is connected after the extension tool 20 is screwed into the extension target bolt, it is possible to visually check the bolt engagement margin. Furthermore, the length can be freely adjusted.

Furthermore, compared with welding, it does not require a firearm and is safe.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a bolt extension structure according to the present invention.

FIG. 2 is a perspective view showing an extension tool in FIG.

FIG. 3 is a cross-sectional view showing another embodiment of the bolt extension structure according to the present invention.

FIG. 4 is a perspective view showing another example of the extension tool according to the present invention.

FIG. 5 is a cross-sectional view showing a conventional bolt extension structure.

FIG. 6 is a cross-sectional view showing another example of a conventional bolt extension structure.

[Explanation of symbols]

 10 Hanging bolts 12, 13, 15 Bolts 20 Extension tools 21, 22, 23 Nuts

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Claims (1)

[Scope of utility model registration request] 1. A bolt extension structure formed by connecting two or more bolts, wherein two or more bolts are connected via an extension tool formed by planarly connecting at least two nuts. The extension structure of the bolt characterized in that.