JP2513449Y2 - Structure to prevent the hose from coming off - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved hose disconnection prevention structure.

[0002]

2. Description of the Related Art Conventionally, in a hot water tank unit as shown in FIG. 2, for example, a water supply pipe 2 and a hot water supply pipe 3 are connected to a tank 1, and a heat exchanger 5 and a pump 6 are provided in a drain pan 4 having a drainage port 4a. Are arranged to heat the water in the tank 1 through the heat exchanger 5 and return the water from the pump 6 into the tank 1. A rubber hose 7 connects the discharge port of the pump 6 and the return port of the tank 1.

[0003]

However, if the water pressure in the tank 1 rises due to improper mounting of the pressure reducing check valve 15, malfunction of the pressure reducing check valve 15, malfunction of the safety valve 16, etc. The hose 7 may come off from the discharge port. As a result, water having a drainage capacity higher than that of the drainage port 4a leaks into the drain pan 4 and overflows from the drain pan 4. Therefore, for example, as shown in FIG. 3, in order to prevent the hose 7 from coming off from the discharge port 8 of the pump 6, the outer periphery of the insertion portion 7a of the hose 7 inserted into the discharge port 8 is fixed by tightening with a metal fitting 9. There is a method to
However, there is a problem that workability for fixing the metal fitting 9 is poor. There is also a method of directly fixing the hose to the drain pan 4 or the like, but there is a problem in that the hose vibrates during transportation and the fixing portion is worn.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hose slip-out prevention structure which has good workability, can be securely prevented from slipping out, and is free from wear.

[0005]

To achieve the above object, the first aspect of the present invention is, as shown in FIG. 1, inserted into a fluid discharge port 6a at a predetermined length A from the axial direction. The hose 7 curved in the radial direction from the vicinity of the insertion portion 7a and the convex side of the bending portion 7b of the hose 7 are fixed with a gap B shorter than the predetermined length A of the insertion portion 7a. And a retaining member 10 for restricting the axial movement of the insertion portion 7a.

[0006]

According to the hose slip-out prevention structure of the first aspect of the present invention, the slip-out preventing member 10 is provided on the convex side of the curved portion 7b of the hose 7 inserted into the discharge port 6a with a short gap B therebetween. Since it is fixedly provided, when the insertion portion 7a of the hose 7 moves axially in an attempt to come off from the discharge port 6a due to an increase in water pressure, the tip side of the curved portion 7b comes into contact with the retaining member 10, so that the insertion portion 7a Axial movement is restricted. This reliably prevents the insertion portion 7a from coming off. Further, since the retaining member 10 is only provided on the convex side of the curved portion 7b of the hose 7, workability for providing the retaining member 10 is good. Furthermore, since the hose 7 does not come into contact with the retaining member 10 due to vibration caused by transportation or the like, the hose 7 is not worn.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. It should be noted that parts having the same configurations and functions as those of the conventional technique shown in FIG. 2 are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows an embodiment. The pump 6 of the hot water tank unit (see FIG. 2) is provided with a discharge port 6a, and a rubber hose 7 is inserted into the discharge port 6a with a predetermined length A from the axial direction. The rubber hose 7 has the insertion portion 7
It is curved at a substantially right angle in the radial direction from the vicinity of a.

On the side of the curved portion 7b of the rubber hose 7 which is convex, a substantially L-shaped retaining plate 10 is provided on the drain pan 4 (see FIG. 2).
It is fixed with screws 11, 11. In the portion of the retaining plate 10 facing the curved portion 7b, rising portions 10a and 10b that rise up with a gap B shorter than a predetermined length A of the insertion portion 7a are provided, respectively.

With the above construction, when the insertion portion 7a of the rubber hose 7 moves axially in an attempt to come out of the discharge port 6a of the pump 6 due to an increase in water pressure in the tank 1 (see FIG. 2), a curved portion 7b is formed. The leading end side of the rising portion 1 of the retaining plate 10
Since it abuts against 0a, the axial movement of the insertion portion 7a is restricted. Further, when the curved portion 7b moves in the direction orthogonal to the axial direction, the base end side of the curved portion 7b is attached to the retaining plate 1.
The curved portion 7b is restricted from moving in the radial direction by coming into contact with the rising portion 10b of 0.

As a result, the insertion portion 7a of the rubber hose 7
Is reliably prevented from coming off. Further, the retaining plate 10 is
Drain pan 4 on the convex side of the curved portion 7b of the rubber hose 7
Since only the screws 11 and 11 are fixed on the top, the fixing workability is also improved. Further, the rubber hose 7 is prevented from being lifted by the rising portions 10a, 10b of the retaining plate 10 due to vibrations caused by transportation.
No wear occurs because it does not contact the

[0012]

As is apparent from the above description, according to the first aspect of the present invention, the convex side of the curved portion of the hose is brought into contact with the retaining member to prevent the insertion portion from moving in the axial direction. It regulates movement. Therefore, it becomes possible to reliably prevent the insertion portion from coming off from the ejection port. Further, since the retaining member is only immovably provided on the convex side of the curved portion of the hose, workability for providing the retaining member is also good. Further, the vibration of the hose does not cause the hose to come into contact with the retaining member, so that the hose is not worn.

[Brief description of drawings]

FIG. 1 is a front view of a hose disconnection preventing structure according to a first embodiment of the present invention.

FIG. 2 is a system diagram of a hot water storage tank unit.

FIG. 3 is a sectional view of a conventional hose disconnection prevention structure.

[Explanation of symbols]

4 ... drain pan, 6 ... pump, 6a ... discharge port, 7 ... hose, 7a ... insertion part, 7b ... curved part, 10 ... retaining plate.

Claims (1)

(57) [Scope of utility model registration request] 1. A hose (7) which is inserted into a fluid discharge port (6a) with a predetermined length (A) in the axial direction and is curved in the radial direction from the vicinity of this insertion part (7a). The hose (7) is fixedly provided on the convex side of the curved portion (7b) with a gap (B) shorter than a predetermined length (A) of the insertion portion (7a), and the insertion portion (7a). A structure for preventing a hose from coming off, comprising a retaining member (10) for restricting the axial movement of the hose.