JPH024312Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a hose disconnection prevention clip, and in particular, to a hose disconnection prevention clip for fixing the end of a flexible hose connected to a joint pipe or nipple, etc. This relates to a protective clip.

[Prior Art] Generally, when installing a hose for pressurized fluid such as gas or liquid, the connection end of the hose is inserted into a joint pipe or a fitting such as a nipple.
In many cases, the outer periphery is tightened with a fastener to prevent it from coming off.

For example, FIGS. 2 and 3 respectively show conventional fasteners for securing connected hoses.

The fastener 20 shown in FIG. 2 is made of a spring wire formed into an annular shape, and both ends of the fastener 20 are lapped together and elastically biased in the direction of diameter reduction.

Then, on both ends of the wrapped spring wire, each end is bent at a substantially right angle toward the outer circumference to form knobs 20a, 20a. It is ring-loaded and the bullet is locked. Large-diameter stepped portions are formed at both ends of the joint tube 22 in this example.

To connect the rubber hose 21 to one end of the joint pipe 22, hold the grips 20a, 20a of the fastener 20 between your thumb and forefinger, and hold the grips 20a, 20a so that the grips 20a, 20a approach each other. With the inner diameter of the fastener 20 expanded,
One end of the joint tube 22 is inserted into the end of the rubber hose 21. Then, when the rubber hose 21 has fully fitted over the large-diameter stepped portion, hold the fastener 20 on the rubber hose and release the knobs 20a, 20a at both ends, and the fastener 20 will reduce its inner diameter. One end of the joint tube 22 is tightened from above the end of the rubber hose 21 to prevent the rubber hose 21 from coming off.

Further, the fastener 30 shown in FIG. 3 is equipped with one collector chuck-shaped insertion piece 31, and this insertion piece 31 is distributed in a large number in the circumferential direction, and the insertion piece 31 is arranged in a longitudinal direction. It has collet members 33, 34 which are separated from each other by a vertical slit 35 and have a spring action. A fixing ring 37 is then mounted on the spigot piece 31, which fixing ring 37 holds the collet members 33, 34 radially inwardly in a working position facing their axially outer ends. It is of the type that is compressed and held and released in an axially inward non-active position, in particular for connecting metal conduits, in which the fixing ring 37 has a self-locking effect at least in its active position. Collet member 33,
34. The fixing ring 37 has an internal thread 38 , and the insertion piece 31 has an internal thread 38 .
3, 34 has an external thread 39, and the thread area of the collet members 33, 34 is conically widened when the fixing ring 37 is in its inactive position; At least one ring tooth 40 extending over the entire width of the collet members 33, 34 protrudes inwardly along the inner periphery of the insertion piece 31 at a location corresponding to the outer thread 39.

[Problems to be solved by the invention] However, in the case of the conventional fastener 20 described above, when connecting the rubber hose 21, the fastener 20
Clamping the knobs 20a, 20a of the fastener 2
It is necessary to insert the connector through the rubber hose while keeping the inner diameter of the connector 0 enlarged, which poses a problem in that it is not only difficult to connect, but also requires a large amount of force.

Furthermore, since the grip portion 20a of the fastener 20 protrudes from the annular portion toward the outer circumference, there is a problem in that it tends to interfere with other members. In addition, fastener 2
0 is installed on the rubber hose 21 side in advance, so
There is a problem in that the rubber hose 21 tends to come off during transportation or when the rubber hose 21 is being routed, and there is a risk that the rubber hose 21 may be lost.

In addition, in the case of the conventional example shown in FIG. 3, since the pipes to be connected are inserted into the collector members 33 and 34, metal pipes or the like must have a certain hardness, and flexibility is required. For example, it is not possible to connect rubber hoses, etc., and there are many parts, and tightening is troublesome because screws are used.

This idea was created in view of the above problems.
To provide a clip for preventing a hose from coming off, with which a hose can be easily connected and fastened, and which is difficult to lose.

[Means and effects for solving the problems] As a means for solving the above problems, the present invention has a cylindrical shape having a substantially truncated conical outer shape, which is expanded in a tapered shape toward one end, which is a large diameter end. At least two vertical slits are formed on the other end, which is the small diameter side, and at least two locking legs having locking protrusions are formed on the inside, and the tapered widened minimum inner diameter is connected to the connection. Use a clip whose diameter is slightly larger than the maximum outer diameter of the large-diameter stepped portion of the tool.

Then, a clip is attached in advance to the side of a connecting device such as a joint pipe or nipple so as to be movable in the pipe axis direction. After inserting the hose into the connector, by moving the clip onto the hose, the hose is automatically prevented from coming off due to the wedge action of the tapered cylindrical body. In other words, the taper formed on the clip has a large diameter on the side in which the hose 3 is pulled out, and gradually becomes smaller in diameter on the opposite side of the locking leg. Due to the wedge action, the force that tightens the enlarged diameter portion of the hose is increased, and the pull-out prevention effect is further strengthened to prevent the hose from coming off.

[Embodiment] Hereinafter, an embodiment in which the clip for preventing hose coming off according to the present invention is applied to fixing a connecting portion of a hose that sends washer fluid to a wiper will be described with reference to the drawings.

However, as a matter of course, the components, other members, arrangement, etc. described or illustrated in the following explanation examples are not intended to limit the present invention.
This is just an illustrative example.

Figures 1A, B, C, D, E, and F show the clip according to this embodiment. Figure 1A is a perspective view of the clip, and Figure 1B is the clip attached to the joint pipe. Figure 1C is a side view showing Figure 1A.
Figure 1D is a cross-sectional view of the hose attached to the joint pipe, Figure 1E is a cross-sectional view of the hose inserted into the joint pipe, and Figure 1F is a cross-sectional view of the hose inserted into the joint pipe. It is a sectional view showing a stopped state.

In FIG. 1, the clip 1 has a cylindrical shape with a frustum-shaped outer shape, and the clip 1 widens in a tapered shape toward one end, which is a large diameter end, and the other end, which is a small diameter end, is widened in a tapered shape. , in this example, clip 1 at four equal parts of the circumference.
Four locking legs 1b are formed by inserting slits in each of the locking legs 1b up to approximately the center of the locking leg. The clip 1 is made of hard synthetic resin or the like.

The four locking legs 1b, 1b, . A protrusion 1c is formed on the inner peripheral surface to prevent the clip 1 from coming off and to prevent the clip 1 from moving when engaged with a hose. Although the protrusion 1c in this example has a mountain-shaped tip, the shape does not matter as long as it meets the above purpose.

The clip 1 has locking legs 1b, 1b...
The inner diameter α of the tapered surface 1a at the base end position of...
As shown in FIG. 1C, it is formed to have a slightly larger diameter than the maximum outer diameter β of a large diameter stepped portion 2c in the joint tube 2, which will be described later. Further, the inner diameter at the tip of the locking leg 1b is smaller than the maximum outer diameter β of the large diameter stepped portion 2c.

Clip 1 in this example is used as a connection point for sending washer liquid in a reserve tank (not shown) to a nozzle part (none of which is shown), and is pre-installed on the side of joint pipe 2, which is a connection tool. (See Figure 1B).

The joint tube 2 has a large-diameter body portion 2a formed at the center in the longitudinal direction of the tubular shape, and small-diameter neck portions 2b, 2b (only one of which is shown) are formed at both ends of the large-diameter body portion 2a. The small-diameter neck portion 2b is provided with a large-diameter step portion 2c in the shape of a truncated cone with a small diameter at the end thereof.

On the outer periphery of the small diameter neck portion 2b of the joint tube 2,
Insert the clip 1 from the locking leg 1b side and encircle it. At this time, the protrusion 1c formed at the inner tip of each locking leg 1b is connected to the large diameter stepped portion 2 of the joint tube 2.
c and moves along the peripheral wall of the large-diameter stepped portion 2c. The projection 1c is curved by the elasticity of the locking leg 1b itself and expands its inner diameter. In this way, each locking leg 1b overcomes the large-diameter stepped portion 2c of the joint tube 2.

As described above, the clip 1 is mounted around the outer periphery of the small-diameter neck portion 2b in a state in which it is movable in the axial direction and is prevented from coming off by the engagement between the projection 1c and the large-diameter stepped portion 2c.

Next, using the clip 1 constructed as described above to connect a hose, and preventing the connection from coming off will be explained based on FIGS. 1D to F.

First, as described above, the clip 1 is attached in advance to the outer periphery of the small diameter neck portion 2b of the joint tube 2 (see FIG. 1D).

After retracting the clip 1 to a position near the center of the joint tube 2 (i.e., a position where the distal end side of the locking leg 1b contacts the large diameter body 2a of the joint tube 2), the clip 1 is formed at the end of the joint tube 2. The large diameter stepped portion 2c is press-fitted into the hose 3 to be connected. At this time, the hose 3 is fully inserted and connected so that the end 3a of the hose 3 reaches near the large-diameter body 2a of the joint pipe 2.

When the hose 3 is connected, the maximum outer diameter on the joint pipe 2 side becomes the outer periphery of the large diameter step 2c on which the hose 3 is attached, and the maximum outer diameter γ at this position (i.e., the enlarged path 3b outside diameter) is
The diameter is larger than the inner diameter α at the base end position of the locking leg 1b. (See Figure 1E).

Next, attach the clip 1 to the large diameter stepped portion 2c of the joint pipe 2 in the same direction as the direction in which the hose 3 is removed.
The clip 1 is moved to a position where the tapered inner peripheral surface 1a of the clip 1 presses against the outer periphery of the enlarged diameter portion 3b of the hose 3. In this way, the hose 3 can be tightened with the clip 1 to prevent it from coming off (see FIG. 1F).

At this time, the tips of each of the four locking legs 1b are located on the hose 3, and the protrusion 1c comes into contact with the outer peripheral surface of the hose 3 on the end 3a side.

When a force is applied in the direction of removal of the hose 3 (a force directed to the right in FIG. 1F) due to the internal pressure of the washer fluid or external force, the clip 1
is in frictional engagement with hose 3, so clip 1
tries to move together with hose 3.

However, the tapered surface 1a of the clip 1 has a larger diameter on the side in which the hose 3 comes out, and the locking leg 1b on the opposite side has a larger diameter.
is formed so that it gradually becomes smaller in diameter,
As the hose 3 moves in the direction of removal,
Due to the wedge action of the tapered surface 1a, the force that tightens the enlarged diameter portion 3b of the hose 3 is increased, and the slippage prevention effect is further strengthened.

Also, the hose 3 connected to the joint pipe 2
When removing the hose 3, first move the clip 1 toward the large diameter body 2a of the joint tube 2 (leftward in FIG. 1F) to release the clamping of the hose 3 by the clip 1 (as shown in FIG. E), and then pull the hose 3 in the removal direction to easily remove it.

In this example, the clip for preventing the hose from coming off has been described as an example in which the clip is used at the hose connection part of the washer liquid piping. The present invention can be suitably applied to clips for preventing the coming off of hoses, etc., or for preventing coming off of flexible hoses for transferring various other pressurized fluids.

[Effects of the Invention] As explained above, the clip for preventing hose disconnection according to the present invention has the advantage that the hose can be easily connected and fastened, and it is difficult to lose.

Further, since a plurality of locking legs are provided on the small diameter side of the truncated cone having a tapered surface, the effect of preventing rattling and coming off during use can be strengthened.

[Brief explanation of the drawing]

Figures 1A, B, C, D, E, and F show the clip according to this embodiment. Figure 1A is a perspective view of the clip, and Figure 1B is the clip attached to the joint pipe. Figure 1C is a side view showing Figure 1A.
Figure 1D is a cross-sectional view of the hose attached to the joint pipe, Figure 1E is a cross-sectional view of the hose inserted into the joint pipe, and Figure 1F is a cross-sectional view of the hose inserted into the joint pipe. A cross-sectional view showing the fastened state, and FIGS. 2 and 3 respectively show conventional fasteners. FIG. 2 is a perspective view, and FIG. 3 is a longitudinal sectional view. 1...Clip, 1a...Tapered shape (tapered surface), 1b...Locking leg, 1c...Protrusion, 2...Connector, 2c...Large diameter stepped portion, 3...Hose.

Claims (1)

[Claims for Utility Model Registration] 1. A clip for preventing hose coming off that is used by being attached to a connector having a large-diameter stepped portion at least at the end, the large-diameter end being one end of a cylindrical shape with an approximately truncated cone shape. At least two slits are formed at the other end, which is the smaller diameter side, and at least two locking legs each having a locking protrusion are formed on the inside. A clip for preventing a hose from coming off, characterized in that the minimum inner diameter when opened is slightly larger than the maximum outer diameter of the large-diameter stepped portion of the connector. 2. The clip for preventing hose coming off as claimed in claim 1, wherein the locking leg is elastically biased toward the center of the clip.