JPH0737818Y2 - Hose connection fittings with hose disconnection prevention ring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a hose connection fitting provided with a hose disconnection prevention ring attached to a connection fitting of a rock drilling machine or the like operated by air pressure.

(B) Conventional technology Conventionally, for example, a rock drill is connected to a compressor,
It is operated by air pressure from the compressor, and it is detachably connected to the compressor by connecting fittings provided on the tip of the hose extended from a rock drill etc. and the tip of the hose from the compressor. It is configured so that other work machines can be connected to.

Such a connecting fitting is composed of, for example, a spat and a nut, has a threaded surface formed on the outer peripheral surface of the spat, and is screwed to the inner peripheral surface of the nut to easily connect the rock drill etc. and the compressor. .

Further, an ear portion is provided on the circumferential surface of the nut, and the ear portion is hit with a hammer to firmly connect the nut and the spat.

(C) Problems to be Solved by the Invention However, in the above-described connecting fitting, the nut is easily rotated and loosened by the vibration transmitted from the rock drill and the like, and there is a risk that the nut is easily separated from the spat.

Therefore, when this connecting fitting comes off, the rock drill will stop and the compressor hose will be injured by air pressure.
The connecting metal fitting at the tip of the hose hits the worker, and the worker is injured.

(D) Means for Solving the Problems The present invention provides (b) a cylindrical spat having a hexagonal head portion and a small-diameter threaded portion on the rear outer peripheral surface,
(B) A cylindrical stem having a connecting portion with a threaded portion at the front end and having a tapered surface having an engaging projection at the rear end, and (c) a spat is screwed with the threaded portion on the inner surface of the front end. It consists of a tubular nut that has a threaded portion and has a beating ear portion projecting from the outer peripheral surface, and one hose is fitted into the spat to connect it to the front end of the stem, and the front end is also a spat. A hose that is fitted into the spat and the nut, with the other hose connected to the rear end of the stem and the screw part of the nut screwed into the screw part of the spat. In a hose connection fitting having a hose disconnection prevention ring capable of being connected via a stem, a C-shaped mounting ring is provided around the screwed portion between the rear end surface of the hexagonal head of the spat and the front end surface of the nut. Wear the same wearing ring A spat engaging piece and a nut engaging piece that extend in a bent state in the width direction and in the opposite direction are provided on both side edges of the center, and the spat engaging piece is brought into contact with one flat surface of the hexagonal head of the spat. , The nut engaging piece,
The present invention relates to a hose connection fitting including a hose disconnection prevention ring, which is characterized in that it can be engaged with an ear provided on the outer peripheral surface of a nut.

(E) Operation and effect In the present invention, a spat and a nut are provided at the tip of the hose between the rock drill etc. and the compressor, and the spat is screwed onto the nut to connect them.

Further, when the spat and the nut are connected, a mounting ring for the separation prevention ring is attached to the spat, the spat engaging piece provided on the ring is engaged with the hexagonal head of the spat, and the nut engaging piece is attached. Prevents the spat from coming off by engaging the nut's striking ear.

That is, since the spout engagement piece of the mounting ring engages with the hexagonal head of the spatula, the separation prevention ring is fixed to the spat and the nut engagement piece engages the nut with the beating ear portion. Since it fits, the rotation of the spat can be prevented.

Therefore, by preventing the disengagement of the connecting fittings provided on the hoses between the rock drill etc. and the compressor, the worker can work safely.

Further, since the mounting ring is formed in a C shape, it can be removably mounted on the spat, and the detachment prevention ring can be easily attached to and detached from the connection fitting.

(F) Embodiment An embodiment of the present invention will be described in detail with reference to the drawings. In the perspective view of FIG. 1, A indicates a connecting fitting, and the connecting fitting A includes a spat 1, a stem 2 and a nut. It is composed of 3 and 3.

The connecting fitting A is a pneumatic rock drilling machine,
The spat 1 and the nut 3 are attached to the tips of the hoses 4 and 5 with the compressor, and the hoses 4 and 5 are detachably connected by the spat 1 and the nut 3.

Hereinafter, the structure of the spat 1 and the nut 3 of the connection fitting A will be described in detail.

That is, the spat 1 is formed in the shape of a hexagonal bolt, has a small-diameter threaded portion 1b formed at the rear of the hexagonal head 1a having the hexagonal surface 1-1, and is formed into a tubular shape as a whole. hand,
The hose 4 is attached inside thereof.

Further, the stem 2 is formed into a cylindrical body having a small diameter and a long shape, and a taper surface 2a, an engaging projection 2b, etc. are provided on the outer peripheral surface thereof.

Then, one end of the stem 2 is formed so as to be inserted into the opening of the hose 5, and the other end is brought into contact with the threaded portion 1b of the spat 1.

Further, a nut 3 is attached to the stem 2 and connected to the spat 1. The nut 3 is a cylindrical body of a slightly large diameter.
3a, and a threaded portion 3b is formed on the inner peripheral surface thereof.

With such a structure, as shown in FIG. 1, the stem 2 having the hose 5 connected thereto is mounted in the nut 3, the spat 1 is inserted into the nut 3, and the threaded portion 3b of the nut 3 is inserted.
The threaded portion 1b of the spat 1 is screwed onto the hose 4, and the hoses 4 and 5 are communicated and connected from within the spat 1 through the inside of the stem 2.

Further, left and right ears 6 are provided on the outer peripheral surface 3-1 of the nut 3, and the ears 6 are hit with a hammer or the like to securely tighten the nut 3 and the spat 1. It is something to do.

In the present invention, a detachment prevention ring 7 is attached to the above-mentioned connection fitting A so as to prevent the detachment of the spat 1 and the nut 3.

That is, the separation prevention ring 7 is, as shown in FIG.
It is composed of a mounting ring 7a that is detachable from the spat 1, a spat engaging piece 7b that engages with the hexagonal head 1a of the spat 1, and a nut engaging piece 7c that engages with the ear portion 6 of the nut 3. ing.

The mounting ring 7a is formed in a substantially C shape, and is removably mounted on the mounting portion formed at the front end of the threaded portion 1b of the spat 1.

Further, as shown in FIG. 2, both ends of the mounting ring 7a are curved outward and the curved portion 7-1 is pressed so that the mounting ring 7a can be easily removed from the spat 1. There is.

Further, as shown in FIGS. 3 to 7, the mounting ring 7a includes a flat plate-like spat engagement piece 7b and a nut engagement piece.
7c and 7c are provided in the front-rear direction.

The spat engaging piece 7b extends forward of the mounting ring 7a, and the tip portion thereof is engaged with the hexagonal head 1a to fix the mounting ring 7a to the spat 1.

That is, the tip of the spat engaging piece 7b is brought into contact with the hexagonal surface 1-1 of the hexagonal head 1a, and the spat engaging piece 7b is engaged with the hexagonal head 1a.

The nut engaging piece 7c extends rearward from the mounting ring 7a, and the tip end thereof is engaged with the beating ear portion 6 provided on the outer peripheral surface 3-1 of the nut 3 to rotate the spat 1. To prevent.

Moreover, the spat engaging piece 7b and the nut engaging piece 7c are substantially L
It is formed in a character shape and is configured to engage with each part regardless of a step with the mounting part of the spat 1.

In the present embodiment, one mounting engaging piece 7b is attached to the mounting ring 7a.
Although the nut engaging pieces 7c are provided, in another embodiment, a plurality of spat engaging pieces 7b and nut engaging pieces 7c may be provided.

Further, the shape of each of the spat engaging pieces 7b and the nut engaging pieces 7c may be formed in a mountain shape or other shapes in addition to the flat plate shape.

As described above, this embodiment has the following effects.

In the present invention, the hoses 4,5 between the rock drill etc. and the compressor are used.
A spat 1 and a nut 3 are provided at the tip of the, and the threaded portion 1a of the spat 1 is screwed onto the threaded portion 3a of the nut 3 to connect them.

Moreover, when the spat 1 and the nut 3 are connected, the mounting ring 7a of the detachment prevention ring 7 is attached to the mounting portion provided in the threaded portion 1b of the spat 1, and the spat engaging piece 7a of the ring 7a is attached.
Is engaged with the hexagonal surface 1-1 of the hexagonal head 1a of the spat 1, and the nut engaging piece 7c is provided with the ear 6 for striking the nut 3.
To prevent the spat 1 from coming off.

That is, the separation prevention ring 7 is fixed to the spat 1 because the spat engagement piece 7b of the mounting ring 7a is engaged with the hexagonal head 1a of the spat 1, and the nut engagement piece 7c is fixed to the nut 3. Is engaged with the striking ear portion 6, the spat 1
Can be prevented from rotating.

Therefore, it is possible to prevent the connection fitting A provided on the hoses 4 and 5 between the rock drill or the like and the compressor from coming off, and the worker can safely perform the work.

Further, since the mounting ring is formed in a C shape, it can be detachably mounted on the spat 1, and the detachment prevention ring 7 can be easily attached to and detached from the connection fitting A.

[Brief description of drawings]

FIG. 1 is a perspective view of a hose connection fitting having a hose disconnection prevention ring according to the present invention, FIG. 2 is a front view of the disconnection prevention ring, FIG. 3 is a rear surface of the ring, and FIG. 4 is a plan view of the ring. FIG. 5 is a bottom view of the ring, FIG. 6 is a side view of the ring, FIG. 7 is a cross-sectional view taken along the line II of FIG. 2, and FIG. 8 is an exploded perspective view of a connecting fitting. In the figure, 1: Spat 2: Stem 3: Nut 7: Separation prevention ring 6: Strike ears 7a: Mounting ring 7b: Spat engagement piece 7c: Nut engagement piece

Claims (1)

[Scope of utility model registration request] (A) A cylindrical spat (1) having a hexagonal head (1a) and a small diameter screwing portion (1b) on the outer peripheral surface of the rear portion, and (b) screwing at the front end. A cylindrical stem (2) having a connecting portion with the portion (1b) and a tapered surface (2a) having an engaging projection (2b) at the rear end, and (c) a spat (1) on the inner surface of the front end. The spat comprises a cylindrical nut (3) provided with a screwing portion (3b) screwed with the screwing portion (1b) of the above, and protruding ears (6) for striking on the outer peripheral surface. One hose (4) is fitted into (1) to connect to the front end of the stem (2), and the front end is brought into contact with the threaded portion (1b) of the spat (1). ) With the other hose (5) connected to the rear end, and the threaded part (3b) of the nut (3) screwed into the threaded part (1b) of the spat (1), A hose connecting fitting having a hose disconnection prevention ring capable of connecting hoses (4) and (5) fitted into a pad (1) and a nut (3) via a stem (2), wherein a hexagon of the spat (1) is provided. Attach a C-shaped mounting ring (7a) around the threaded portion (1b) between the rear end surface of the head (1a) and the front end surface of the nut (3), and center the same mounting ring (7a). A spat engagement piece (7b) and a nut engagement piece (7c) that extend in a bent state in the width direction and in the opposite direction on both side edges.
Is provided, the spat engaging piece (7b) is brought into contact with one flat surface of the hexagonal head (1a) of the spat (1), and the nut engaging piece (7c) is placed on the outer peripheral surface of the nut (3). A hose connection fitting having a hose disconnection prevention ring, characterized in that it can be engaged with an ear portion (6) provided on the.