JPH06117200A - Water supply device using threaded rock bolt - Google Patents

Abstract

PURPOSE:To obtain a coupling which is removable and is not loosened, by a method wherein a cylindrical part with no threads is formed in the vicinity of the end part of a threaded hollow rock bolt and after a half-split tapered spacer is mounted thereon, the cylindrical part is connected with a connecting sleeve on the side of a water supply hose through a turnbuckle type outer sleeve. CONSTITUTION:A cylindrical part with no threads is formed in the vicinity of the end part of a hollow rock bolt 1, on which left-hand threads are formed, and a half-split tapered spacer 4 is mounted on the cylindrical part. A flanged stop ring is formed on a connecting sleeve 2 for clamping a hose which supplies water and an anchoring agent into the rock bolt 1. The rock bolt 1 is connected with the connecting sleeve 2 through an outer sleeve 3 wherein the left-hand threads are formed on one side thereof and right-band threads on the other side, and thus even if the rock bolt 1 is allowed to turn in either direction of the right and left or to vibrate, thread parts are not loosened. In this way, a coupling to be attached and detached easily and surely can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply device for a lock bolt with a screw.

[0002]

2. Description of the Related Art Even in a threaded lock bolt having a thread engraved on its entire length, water and a fixing agent must be supplied to the tip from the tail end. At that time, a method of connecting the connecting fitting of the water supply hose by screwing it in using a screw of a bolt is adopted.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the conventional water supply device for the threaded lock bolt as described above,
There are the following problems. <A> When the bolt is rotated in the same direction as the screw during drilling,
Loosen by the rotation of the bolt and the vibration of the impact. <B> Therefore, a method of processing and connecting a screw in the direction opposite to the rotating direction to the inside or outside of the threaded bolt has also been adopted. With this structure, the bolt is not loosened even when it is rotated or hit, but since the thread is processed on the bolt, the effective cross section of the bolt is reduced and the strength is reduced. <C> Further, when the connecting metal object is connected to the inside of the bolt, the internal cross-section becomes small only at that portion, and the flow of the fixing agent having a high viscosity is obstructed at that portion, which often results in blockage.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is possible to reduce the effective cross section and the inner cross section without loosening due to the rotation and vibration of the bolt. It is an object of the present invention to provide a water supply device in a threaded lock bolt, which does not have a pipe.

[0005]

That is, the present invention is a member for attaching a water supply hose to an end surface of a threaded lock bolt having a thread engraved on the outer circumference over the entire length, and a connecting tube with the water supply hose, In the vicinity of the end surface of the lock bolt with a screw, a cylindrical portion formed without engraving the screw, and a tapered spacer fitted to the cylindrical portion,
It consists of an outer cylinder that is screwed into the outer circumference of the lock bolt, and an inner groove that is formed by engraving the inner surface of the outer cylinder with a taper, and with the spacer inside the tapered inner groove, the lock bolt is locked by the outer cylinder. Is a water supply device in a lock bolt with a screw, which is configured by attaching the above-mentioned connecting cylinder to the tail end side of the.

[0006]

The structure of the present invention will be described below with reference to the drawings. <A> Rock bolt As the lock bolt 1 which is the object of the present invention, a lock bolt 1 with a thread is used, in which a left screw is engraved on the outer circumference over the entire length. The lock bolt 1 having this shape is characterized in that it can be punched by hitting and rotating at any position. The threaded lock bolt 1 is hollow, and a water supply hose for supplying water or a solidifying agent to the hollow hole needs to be attached to its tail end. The present invention is a member therefor. Then, particularly near the end surface of the threaded lock bolt 1, a cylindrical portion 11 in which no screw is engraved is formed.

<B> Connection Cylinder The connection cylinder 2 is composed of a large diameter portion 21 and a small diameter portion 22, and a stop ring 23 projecting in the form of a collar is provided in the middle thereof. The stop ring 23 is a member that receives the end portion of the outer cylinder 3 described later. The outer diameter of the small diameter portion 22 is the lock bolt 1
The outer diameter of the large-diameter portion 21 is slightly larger than the outer diameter thereof. A screw is engraved on the outside of the small diameter portion 22. The screw of the small diameter portion 22 is a normal right screw. Further, a right-hand thread is engraved inside the large-diameter portion 21, and a hose is attached to this to form the connecting portion.

<C> Spacer A tapered spacer 4 is fitted into the cylindrical portion 11 of the lock bolt 1. This spacer 4 is a hollow circular truncated cone cut in a semicircular shape. The inside of the spacer 4 is a hollow part having the same diameter, and the inside of this is the lock bolt 1
Then, the taper-shaped enlarged portion side is set to face the tail end of the lock bolt 1.

<D> Outer Cylinder 3 The outer cylinder 3 is a cylinder for screwing into the outer periphery of the lock bolt 1. Therefore, the left screw 3 is attached to a part of the inner surface of the outer cylinder 3.
1 is engraved, and the right screw 32 is engraved on the other part. The inner diameter of the portion engraved with the left screw 31 is equal to the outer diameter of the lock bolt 1, the portion engraved with the right screw 32 has an inner diameter larger than that, and the inner diameter is the small diameter portion of the connecting tube 2. Equal to the outer diameter of 22. Further, an inner groove 33 is provided on a part of the inner surface of the outer cylinder 3. The inner groove 33 has a shape in which the top of the screw is cut off in a tapered shape. Inside the inner groove 33, a tapered slope is formed in a state where the inner diameter on the tail end side becomes large when screwed into the threaded lock bolt 1. Then, the above-mentioned spacer 4 is set inside the tapered inner groove 33.

<E> Assembly The left screw 31 of the outer cylinder 3 is screwed into the lock bolt 1 having the left screw formed therein. When the left screw 31 is sufficiently screwed in and the cylindrical portion 11 is exposed from the other end of the outer cylinder 3, the cylindrical portion 11 is covered with the spacer 4. In that state, the outer cylinder 3 is returned to the tail end side of the lock bolt 1. Then, the spacer 4 and the slope of the inner groove 33 come into contact with each other, making it impossible to retreat beyond a certain distance. In this state, the connecting cylinder 2 is screwed into the right-hand thread 32 portion on the tail end side of the outer cylinder 3 via an O-ring, and a general hose is attached to the tail end of the connecting cylinder 2. Thus, the set of the water supply device of the present invention is completed.

[0011]

[How to use] With the above configuration, a water supply device is attached to the tail end of the lock bolt 1, and a water supply hose or the like is attached to the tail end. In this way, the threaded lock bolt 1 is vibrated and rotated to make a hole.

[0012]

As described above, the water supply device for the threaded lock bolt of the present invention has the following effects. <A> The loosening caused by the rotation and vibration of the lock bolt is stopped by the tapered spacer 4. Therefore, the lock bolt 1 will not loosen when rotated in either direction. <B> The effective area of the bolt is not reduced. Therefore, there is no place where the strength is reduced. <C> Since the internal cross-sectional area of the bolt does not decrease, the possibility of blockage is low even if a highly viscous material such as a solidifying agent is supplied. <D> Since everything is assembled by screwing, unlike the welded structure, it is easy to attach and detach.

[Brief description of drawings]

FIG. 1 is an assembly diagram of an embodiment of a water supply device of the present invention.

FIG. 2 is an exploded view

FIG. 3 is an end view of a part of the outer cylinder.

FIG. 4 is an explanatory diagram of a usage state.

Claims (1)

[Claims] 1. A member for attaching a water supply hose to an end surface of a threaded lock bolt having a thread engraved on its outer circumference over its entire length, comprising a connecting tube for connecting the water supply hose and a screw near the end surface of the threaded lock bolt. The cylindrical part that is formed without engraving, the tapered spacer that fits into this cylindrical part, the outer cylinder that is screwed into the outer periphery of the lock bolt, and the inner groove that is engraved by engraving the inner surface of the outer cylinder. A water supply device for a lock bolt with a screw, in which the spacer is positioned inside the tapered inner groove, and the connecting cylinder is attached to the tail end side of the lock bolt by an outer cylinder.