JP2518114Y2 - Bolt extension structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extension structure for bolts used at construction sites, construction sites, etc.

[0002]

2. Description of the Related 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 the suspension bolt 1 via a long nut 3 and extended. FIG.
An example in which another bolt 2 is welded 4 to the hanging bolt 1 and extended is shown.

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

[0005]

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

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

[0007] Further, the setup of the welder is required, and
Dangerous due to the use of firearms in the work area. 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] extension structure bolt according to the present invention, the factory in extension structure of the bolt formed by connecting two or more bolts, at least two or more nuts
Two or more bolts are connected via an extension tool formed by connecting the tool fastening surfaces to each other .

[0009]

In the present invention, for example, when the length of the bolt becomes insufficient during the operation of suspending the ceiling base, or when the leveling of the bolt is performed, the tip of the hanging bolt is
It can be extended to a desired length by screwing it into one nut constituting the extension tool and screwing an extension bolt into another nut.

[0010]

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 represents a suspension bolt.

The suspension bolt 10 is used for suspending a ceiling base. The tip 1 of this hanging bolt 10
An extension tool 20 is screwed into the first thread 1. A connecting bolt 12 for screwing into a predetermined length is screwed to the extension tool 20.

As shown in FIG. 2, the extension tool 20 includes two 6's.
The square nuts 21 and 22 are arranged so that they are flush with each other.
The tool fastening surfaces 21a and 22a are butted and connected by welding.

Further, the extension tool 20 includes a single metal plate and two hexagonal nuts connecting the tool fastening surfaces 21a and 21b.
It may be punched into a form in which it is planarly connected so that 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. The desired length can be extended by screwing the connecting bolt 12 into the screw hole 22b of another nut 22.

As described above, according to this embodiment, the end portion 11 of the hanging bolt 10 is screwed into the screw hole 21b of 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, the work can be performed in a short time.

Moreover, since the connecting bolt 12 is connected after the extension tool 20 is screwed into the tip end 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, it does not require a firearm as compared with welding, 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 this embodiment, when the bolt 13 cannot reach the predetermined level, the tip portion 14 of the bolt 13 cannot be reached.
The bolt 13 can be extended to a predetermined level by attaching the extension tool 20 to the screw and screwing the bolt 15 for level adjustment.

FIG. 4 shows a modification of the extension tool 20 so that the three hexagon nuts 21 , 22 , and 23 are in the same plane.
To the tool tightening surfaces 21a, 22a, 22c, 23a
Are butted and connected in a plane by welding . Each of the three hexagon nuts 21, 22, and 23 has a screw.
The holes 2b, 22b and 23b are formed. Also in this case, the same operational effects as those of the above-described embodiment can be obtained.

In each of the above 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]

As described above, according to the present invention, an extension tool having a nut function is attached to an extended bolt, and a bolt having a desired length is attached to the extension tool to obtain a bolt having a predetermined length. Therefore, it is possible to 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 engagement margin of the bolt. Furthermore, the length can be freely adjusted.

Furthermore, there is no need for a firearm as compared with welding,
It 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 the 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 bolt 12, 13, 15 Bolt 20 Extension tool 21, 22, 23 Nut

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F16B 37/06 E04B 5/58 B

Claims (1)

(57) [Scope of utility model registration request] In extension structure according to claim 1] formed by connecting two or more bolts bolt, at least two or more nuts its
2. An extension structure of a bolt, wherein two or more bolts are connected through an extension tool formed by connecting the tool tightening surfaces to each other .