JPS633716Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flange device for a bellows-like flexible tube used for water supply, hot water supply, etc.

Flexible tubes, which can change the direction of water flow without using pipe aids such as elbows, are often used for water supply and hot water supply piping. This flexible tube is provided with continuous single-pipe or spiral concavities and convexities to form a bellows-like shape. Such a bellows-like flexible tube has a nut-engaging flange for connection to a piping mouthpiece of a water heater, a tee joint, or the like.

Conventional tube flanging involves clamping the tube from the end face up to two or three peaks with a clamping body that fits the peaks and valleys, and then hitting the end face with a hammer or screwing the tube against the clamping body toward the tube. This is done by pressing with a male screw.

According to the above-mentioned method of hitting with a hammer, it is difficult to obtain a collar with an accurate shape and water leakage may occur from the connection point, and with the method of pressing with a male screw, there is a risk of sliding friction between the male screw and the tube. Since the resistance is large and the screw must be turned many times, it requires a lot of effort.

In view of the problems of the conventional device, the present invention has been devised by pressing a pressing body against the flexible tube held by the two-split body using a lever that exerts a lever action on the two-split body. To provide a flexible tube flange device capable of accurately forming a flange.

A feature of the present invention for achieving this purpose is that a flexible tube is engaged with a concavo-convex portion in a two-split main body that is pivotally connected at one end and can be expanded, and a pressing body is pushed into the two-split main body. In the flexible tube flange device that compresses the end of the tube by inserting the pressing body, a large-diameter hole is formed in the two-split main body and is concentric with the concave and convex portion, and the pressing body is inserted into the hole so as to be freely slidable in the axial direction, and the two-split body is provided with a fulcrum, and the fulcrum is used as a fulcrum and the pressing body is used as a point of action to push the pressing body toward the tube side by lever action. The reason is that it has a lever.

Embodiments of the present invention will be described below with reference to the drawings.

In Figs. 1 to 5, the flange device 1 has a two-split main body 2, a pressing body 3, and a lever 4 that pivotally supports the pressing body 3.

The two-piece body 2 has pins 5 at the top ends of the two pieces 2A and 2B.
The handle 6A, 6B is provided at the bottom, and inside the handle 6A, 6B is formed a concave/convex portion 9 that can fit with the multiple peaks and valleys 8 of the bellows-shaped flexible tube 7, and a large-diameter hole 10 is formed concentric with the concave/convex portion 9. The inner diameter of the hole 10 is the same as or larger than the outer diameter of the flange to be formed. 11 is a slit formed parallel to the axis of the hole 10.

The pressing body 3 is formed of a round bar, is inserted into the hole 10 so as to be slidable in the axial direction, and is pivotally supported by the lever 4 via a support shaft 13 that passes through the pressing body 3 perpendicularly to the axis thereof. The lever 4 has a bifurcated end and supports both ends of a support shaft 13, and a lower die 13 is exposed between the pressing body 3 and the bifurcated lever 4, and is inserted into the slit 11. Insertable.

The pressing body 3 is inserted into the hole 10, and the support shaft 13 is inserted into the slit 1.
A fulcrum pin (fulcrum part) 14 that can be engaged with the upper end of the bifurcated lever 4 when inserted into the bifurcated body 2 is protruded from the outer surface of the two split bodies 2A, 2B of the two-split main body 2, The lever 4 uses this fulcrum pin 14 as a fulcrum, its lower end is the point of force, and the support shaft 13 and the pressing body 3
acts as a leverage point.

As shown in FIG. 5, the tube 7 is flanged by unfolding the two-split main body 2 and engaging the peaks and troughs 8 of the tube 7 with the uneven portions 9 of one split book 2B. At this time, the tube 7 has two to three peaks protruding from the end toward the hole 10 as shown by imaginary lines.
Thereafter, the two-split main body 2 is closed and the tube 7 is clamped, and with the longitudinal direction of the lever 4 aligned with the axis of the pusher 3, the pusher 3 is inserted into the hole 10 of the main body 2 and supported. Insert the shaft 13 into the slit 11.

The pressing body 3 comes into contact with the end of the tube 7 inserted into the hole 10, and the lever 4 comes into contact with the fulcrum pin 14 in an inclined state as shown by the imaginary line in FIG. 6, the pressing body 3 is slid in the axial direction by the lever action of the lever 4 and is pressed against the tube 7.
The peaks and valleys 8 of the tube 7 are compressed in the axial direction. When the peak 8 is compressed, its outer diameter increases and becomes the tsuba 15.

Fig. 6 shows the state in which the tube 7 with the flange 15 is used, and 16 is a cap (or a chi joint) of a water heater, etc., and the nut 17, which has been fitted in advance to the tube 7, is screwed into the cap 16. As a result, the collar 15 is pressed against the cap 16 to connect the two. A seal ring 18 is interposed between the nut 17 and the collar 15. Note that the seal ring 18 may be provided between the collar 15 and the cap 16.

The flange device 1 may be configured to push the pressing body 3 by the lever action of the lever 4. For example, the lever 4 may be pivoted on the fulcrum pin 14 and abutted against the support shaft 13, or
Even if both the fulcrum pin 14 and the support shaft 13 are not pivotally connected and are only brought into contact with each other, a lever effect can be achieved, and if the fulcrum portion 14 is made to protrude outward from the main body 2. It is also possible to directly push the pressing body 3 with the lever 4.

According to the present invention described in detail above, the pressing body 3 inserted into the hole 10 of the two-split body 2 so as to be slidable in the axial direction is also clamped inside the two-split body 2 by the lever action of the lever 4. bellows-shaped flexible tube 7
Since the flange 15 is formed by pressing the end of the ridge 8 and compressing the peak 8, the flange 15 can be formed in an accurate shape with extremely light force and with a small rotational movement of the lever 4.
can be formed.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention, where Figure 1 is a front view, Figure 2 is a right side view, Figure 3 is a plan view, and Figure 4 is a sectional view taken along the line - - of Figure 2. , FIG. 5 is a developed view, and FIG. 6 is a diagram showing the use state of the flanged flexible tube. 1... Flange device, 2... Two-piece main body, 3...
Pressing body, 4... lever, 7... flexible tube, 9... uneven portion, 10... hole, 14... fulcrum pin (fulcrum part), 15... collar.

Claims (1)

[Scope of utility model registration request] Split body 2 that can be expanded with one end pivotally connected
In the flexible tube flange device which compresses the end portion of the tube 7 by engaging the flexible tube 7 with the uneven portion 9 therein and pushing the pressing body 3 into the two-split main body 2, Inside the main body 2, there is a hole 10 having a large diameter and concentric with the uneven portion 9.
The pressing body 3 is inserted into the hole 10 so as to be slidable in the axial direction, and the two-split main body 2 is provided with a fulcrum portion 14, and the pressing body 3 is supported around this fulcrum portion 14 as a fulcrum. A flexible tube flange device characterized in that it is equipped with a lever 4 that presses a pressing body 3 toward the tube 7 side by lever action using the lever 4 as a point of action.