JP3371949B2 - Soft tube fitting - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for connecting a soft pipe to a tank or the like which stores a liquid, in which the pipe tip is vertically clamped by a leaf spring so that the pipe is fixed. This is a technical feature.

[0002]

2. Description of the Related Art Conventionally, a joint has been used for connecting a soft pipe such as a vinyl pipe to a tank storing a liquid such as a beer server. In the conventional joint, generally, a leaf spring having a ring shape and a plurality of pawls provided around the inner circumference is disposed near the insertion port of the soft tube, and the elastic force of the tab of the leaf spring is increased by pressing and inserting the soft tube. It is used to hold a soft tube.

Further, in such a structure, there is a joint in which a part of the ring-shaped leaf spring is cut so as to increase the elastic force in the pipe circumferential direction so as to be tightened from the pipe circumferential direction.

[0004]

However, the above-mentioned conventional joint has a problem that once the soft tube is inserted, the claws on the inner circumference of the leaf spring bite into the tube and it is not easy to remove the tube. On the other hand, if the tube is pulled in the axial direction by a force greater than the elastic force of the claw from an unexpected situation, the tube may come off and the liquid may leak. Furthermore, when the pipe is inserted from an oblique direction, the flow path of the liquid becomes unsmooth, and for example, in a beer server or the like, turbulent flow may occur in beer and the quality may be impaired. Further, when the pipe is inserted from an oblique direction, the liquid tends to leak from the insertion port.

[0005]

In order to solve the above-mentioned problems, the present invention is directed to a soft pipe joint in which a pair of fan-shaped leaf springs having engaging claws on the inside face a soft pipe insertion port of the joint body. A means for sandwiching the soft tube by allowing the leaf spring to be squeezed in the direction perpendicular to the tube axis is adopted.

[0006] Specifically, a pair of leaf spring holders , which sandwich a fan-shaped leaf spring having an engaging claw on the inside, are formed on the tube shaft by forming a pair of fitting grooves through the insertion hole of the soft tube of the joint body. On the other hand, it is fitted in the fitting groove so as to face in the vertical direction, and a tapered surface is provided on the outer peripheral surface of this leaf spring holder,
Provided inside the cap that can hold the leaf spring holder and be screwed to the joint body is a taper surface that slides with the taper surface of the leaf spring holder, and screw the cap to attach the leaf spring holder to the pipe axis. We adopted a structure in which the soft tube is clamped by pushing it vertically.

Also, a means has been adopted in which a guide tube densely inserted into the inner diameter of the soft tube is provided in the insertion port of the soft tube so as to extend from the flow path.

The joint of the soft pipe according to the above-mentioned structure is designed to clamp the tip of the soft pipe from the vertical direction with respect to the pipe axis, so that the pipe can be firmly fixed. At that time, by sliding the tapered surface of the leaf spring holder and the tapered surface inside the cap, the forward movement of the cap is converted into the movement of the leaf spring holder in the vertical direction to clamp the soft tube.

Further, the guide tube provided extending to the flow path allows the soft tube to be inserted straight into the insertion port by tightly inserting it into the inner diameter of the soft tube, and the tube is slanted. In the case of, the risk of liquid leakage does not occur.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A flexible pipe joint according to the present invention will be described below in detail with reference to the embodiments shown in the drawings. Figure 1
1 is an exploded front view of a joint, in which 1 is a joint body, 2 is a leaf spring holder, 3 is a leaf spring sandwiched by the leaf spring holder 2, and 4 is a joint body so as to wrap the leaf spring holder 2. It is a cap screwed to 1. As shown in FIG. 2, in the joint body 1, reference numeral 5 is a pair of concave grooves spirally provided on the outer peripheral surface of the joint body, and the cap 4 is screwed onto the body 1 by rotating the cap 4 90 degrees. 2 is a pair of insertion grooves into which the plate spring holder 2 holding the plate spring 3 is inserted. As shown in FIG. 2 (C), a pipe is inserted through the insertion port of the soft pipe described below. It is provided so as to face the axis in the vertical direction. 7 is the joint body 1
Is a liquid flow path that opens at one end, and 8 is a soft tube insertion port that communicates with the flow path 7 and that opens at the other end. A guide tube 9 that is densely inserted into the inner diameter of the soft tube (H) to be connected is provided in the connecting portion between the flow path 7 and the insertion port 8 from the flow path 7 to the inside of the fitting groove 6 as necessary. It is provided as an extension. The connection structure between the joint body 1 and the tank body (not shown) is omitted.

FIG. 3 shows a leaf spring holder 2 which holds the leaf springs 3 and fits them into the fitting grooves 6 of the joint body 1, respectively, and has a fan shape as shown in FIG. The leaf spring 3 is sandwiched between the leaf spring holder main body 2a having a recess and the pressing plate 2b shown in FIG. 3 (B). The outer peripheral surface of the leaf spring holder 2 is provided with a tapered surface 2c which is slidably engaged with a tapered surface 4b provided on the inner peripheral surface of the cap 4 described below to press the holder 2 inside the fitting groove 6. There is.

FIG. 4 shows a leaf spring 3, which is the leaf spring holder 2 described above.
The plurality of meshing claws 3a, which are fan-shaped and can be stored in the inner peripheral concave portion, are provided on the inner peripheral side so as to bite into the soft tube.

FIG. 5 shows a cap 4 screwed onto the joint body 1.
However, a pair of protrusions 4a for fitting and screwing into the concave groove 5 on the outer periphery of the joint body 1 are provided on one side of the inner periphery of the joint body 1 so as to face each other. In addition, a taper surface 4 that is slidably engaged with the taper surface 2c provided on the leaf spring holder 2 inside thereof.
b is provided around.

Next, the operation of connecting the soft pipe (H) to this joint will be described with reference to FIG. 6. First, as shown in FIG. 6 (A), the soft pipe is inserted into the cap 4 and then the joint body 1 is inserted. Insert it all the way to the mouth 8. Since the guide tube 9 is extendedly provided at the rear end of the insertion port 8, the soft tube is inserted while the guide tube 9 is inserted into the inner diameter of the soft tube 8. The presence of the guide tube 9 allows the tube to be inserted straight into the insertion port 8 and prevents liquid leakage from this portion.

When the soft tube (H) is inserted, the leaf spring holder 2 holding the leaf spring 3 is fitted from above and below the fitting groove 6 and then the cap 4 is screwed. Protrusion 4 of cap 4
When a is fitted in the groove 5 of the joint body 1 and rotated 90 degrees, the projection 4a is guided by the groove 5 and the entire cap 4 rotates in the groove 5 and advances in the arrow direction (FIG. 6).
(See (B)). When the cap 4 advances, the tapered surface 4b provided on the inner circumference of the cap 4 abuts the tapered surface 2c of the leaf spring holder 2. However, as the cap 4 further advances, the tapered surfaces slide against each other and the leaf spring Holder 2
Will be narrowed down along the fitting groove 6 in the direction perpendicular to the pipe axis. That is, when the cap 4 moves forward, the leaf spring is pushed in the vertical direction which holds the soft tube. Therefore, finally, the soft tube (H) inserted into the insertion port 8 is shown in FIG.
As shown in (C) and (D), the leaf spring 3 and the guide tube 9 are firmly sandwiched so that they cannot be easily removed. In the above example, the cap 4 is rotated 90 degrees so as to be screwed to the joint body 1, but
The present invention is not limited to this, and even if a screw groove is formed in the joint body and the cap is screwed in, the leaf spring is similarly pushed in the vertical direction.

When the soft tube (H) is to be removed,
The leaf spring holder 2 is exposed by rotating the cap 4 in the reverse direction. Since the leaf spring holder 2 can be easily pulled out in the vertical direction, if the leaf spring 3 is pulled up and down, the leaf spring 3 that has bitten into the soft tube is easily pulled out, and the soft tube is no longer regulated. Therefore, if the soft tube is pulled out from the insertion port 8, it can be easily removed.

[0017]

As described above, in the soft pipe joint according to the present invention, since the soft pipe is vertically sandwiched by the fan-shaped leaf springs from both sides, the soft pipe can be held extremely firmly. Further, since the leaf spring holder can be easily attached and detached, the soft tube can be easily attached and detached.

Further, when the soft tube is attached, the guide tube is provided so as to project into the insertion port, so that the flow path of the liquid can always be made straight with respect to the tube, and even if the tube is slanted. Even if it becomes, the liquid will rarely leak.

[Brief description of drawings]

FIG. 1 is an exploded front view of a joint according to the present invention.

FIG. 2A is a front view and a right side view of the joint body,
(B) is a plan view, (C) is a central longitudinal cross-sectional view of the plan view.

3A is a front view and a side view of a leaf spring holder body, and FIG. 3B is a side view of a pressing plate.

FIG. 4 is a side view of a leaf spring.

5A is a front view and a side view of the cap, FIG.
Is a sectional view taken along line AA.

6A is an exploded sectional view, FIG. 6B is a sectional view showing a process of connecting a soft tube, and FIG. 6C is a sectional view showing a connected state.
(D) is a partial view showing a meshed state of the leaf springs.

[Explanation of symbols]

1 joint body 2 leaf spring holder 2c Tapered surface 3 leaf spring 4 cap 4b taper surface 5 groove 6 Fitting groove 7 channels 8 insertion slot 9 Guide tube

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Claims (2)

(57) [Claims] 1. A pair of leaf spring holders which sandwich a fan-shaped leaf spring having a pair of fitting grooves which communicate with an insertion hole of a soft pipe of a joint body and have an inner engaging claw, and a pair of the leaf spring holders are arranged in a direction perpendicular to the pipe axis. the opposite to fit into the fitting groove, provided with a tapered surface on the outer circumferential surface of the plate spring holder, the taper of the plate spring holder inside the threadedly cap to the joint body by holding the plate spring holder A soft pipe joint that has a tapered surface that slides against the surface and presses the leaf spring holder vertically with respect to the tube axis by screwing the cap to clamp the soft tube. 2. A guide tube, which is closely inserted into the inner diameter of the soft tube, is provided in the insertion opening of the soft tube so as to extend from the flow path.
The described soft tube fitting.