JP5775716B2 - Fire hose joint - Google Patents

Description

  The present invention relates to a joint for a fire hose.

  More specifically, even if the connected fire hose is dragged around the road surface or floor surface during fire extinguishing work, the effect of the phosphorescent emission of the phosphorescent joint provided to make the fire hose line easier to see And a fire hose joint capable of exerting two effects of protecting the fire hose joint itself from physical damage over a long period of time.

  Conventionally, a resin containing a light-reflective material or a light-emitting or phosphorescent resin is applied to the fire hose or the joint of the fire hose so that it can be used at night or in a fire scene such as a dark building with blackout and smoke. Even in such cases, fire hoses and their joints have been proposed and used so that the location of the hose line can be immediately seen.

  This is because the hose line has a role to guide the correct return path when firefighters return from a dark and smoke-producing fire site at night or in a building.

  That is, in fire extinguishing activities such as building fires, firefighters hold a water discharge nozzle and drag and expand a fire hose connected to the water discharge nozzle to enter the fire site inside the building and perform fire fighting activities. And when the fire is extinguished, when it is judged that it should be withdrawn or evacuated according to the situation at the site, or when the water has been used up, the fire hose line that has been extended until now is used as a route guide to the outside of the fire building. To return to

  In other words, in general, fire-extinguishing buildings are in a power outage, not to mention light at night, in the dark where it is difficult to shine light during the daytime, and firefighters hiding a strange building in the smoke generated. You have to return only with the main line.

  Therefore, it is desirable to realize a fire hose and its joints that can show the fire hose extending and showing the route to the destination to be returned more instantly and reliably even under such severe conditions. Proposals have been made.

  In terms of indicating the return route, one invention relating to a fire hose is important because it can be shown in a continuous line shape, but the present invention has a large joint portion at the joint portion of the fire hose. Since the return route can be shown larger and easier to see using the diameter, a study was made on the joint of a fire hose having a phosphorescent property.

  For the above reasons, various proposals have been made for joints for connecting fire hoses.

  For example, as a plug-in fitting for a fire hose that has a high light emission brightness in the dark and a long light emission time and excellent durability of the light emitter, a cylindrical fitting is inserted into the cylindrical receiving fitting. A plug-in coupling metal fitting for joining metal fittings to each other, and an extraneous protective band having an outer diameter larger than that of the metal fitting is extrapolated around the receiving metal fitting and a phosphorescent material is mixed into the protective band A plug-in fitting for a fire hose molded with resin has been proposed (Patent Document 1).

  However, the synthetic resin mixed with the phosphorescent substance forming the protective band proposed in Patent Document 1 has not been specially studied, and simply uses various thermoplastic resins or synthetic rubbers. (Patent Document 1, paragraph 0016).

  In addition, an elastic band made of an elastic transparent resin is used as a coupling fitting so as to form the outermost periphery of the joint, and a light reflector layer is provided between the transparent resin layer and the joint body. A coupling metal fitting has been proposed, and as its transparent resin, a polyvinyl chloride resin, an acrylic resin, a polyethylene resin silicone resin, and the like have been proposed (Patent Document 2).

  Among these resins, the silicone resin is considered to be comprehensively superior to others in terms of material transparency, strength, wear resistance, durability, etc. . However, the protective band made of silicone resin must be said to have less than the required level of tensile strength, especially for severe use in the field of disaster prevention. In addition, once a scratch is caused by being caught by a hard obstacle, a crack is generated from the crack, and the crack progresses, so that it may be relatively easily broken and dropped from the joint. For this reason, there is a practical problem in repeated use over a long period of time, and realization of higher strength, wear resistance and durability of the annular protective band has been demanded.

JP 2000-317007 A JP-A-8-71172

  In view of the above-described points, the object of the present invention is to have excellent phosphorescent performance and also excellent physical properties such as strength, wear resistance, and durability, and as a result, excellent visibility and return path. It is an object of the present invention to provide a fire hose joint having an annular protective band that can withstand the repeated use over a longer period of time.

The fire hose of the present invention that achieves the above-described object has the following configuration (1).
(1) An annular molded body containing a semi-transparent or transparent EPDM rubber containing 2 to 7% by weight of a phosphorescent material on the outer periphery of a joint body composed of a tubular receiving metal fitting and a metal fitting ; for fire hose characterized in that the annular molded body protrudes in a convex shape formed by fitted to form a maximum diameter of said receiving metal and pointing bracket catch.

In addition, the fire hose joint of the present invention preferably has the following configuration (2 ) .
(2) the EPDM content of the phosphorescent material of the annular molded body made of rubber, (1) contacting the hand fire hose, wherein a is 3-5 wt%.

  According to the fire hose joint of the present invention according to claim 1, excellent phosphorescent emission performance (brightness of phosphorescent emission (luminance), persistence of phosphorescent emission (luminance decay time)) and its excellent phosphorescent emission performance. Based on the above, it is possible to provide a joint for a fire hose equipped with an annular protective band that can withstand and demonstrate the effect of visibility and induction to the return path over a long period of time.

In particular, according to the present invention according to claim 2, Ru can provide fire hose having more clearly the effect of the claim 1 described above.

The embodiment example which the joint for fire hose of this invention refers is shown, and it is a partially notched sectional view shown in the state which removed the insertion tool and the receiving tool. And it shows the actual embodiments with examples of catch for fire hose of the present invention, a cross-sectional view partially broken away to show a state in which engaging the insert member and the receptacle.

  Hereinafter, the joint for fire hose of the present invention will be described in more detail.

  The joint for a fire hose of the present invention comprises an annular molded body containing EPDM rubber containing 2 to 7% by weight of a phosphorescent material on the outer periphery of a joint main body, and the annular molded body protrudes in a convex shape. It is characterized by being fitted so as to form the maximum diameter portion.

  EPDM rubber refers to ethylene-propylene-diene copolymer rubber, which is a kind of synthetic rubber, and is excellent in weather resistance and water resistance, and also in wear resistance.

FIG. 1 shows an embodiment in which a fire hose joint according to the present invention is referred to . The fire hose joint 1 is composed of a tubular metal fitting 2 and a metal fitting 3 whose main bodies are detachable from each other. Yes. In the drawing, both the metal fittings 2 and 3 are shown in a detached state, but can be connected by inserting the metal fitting 3 into the metal fitting 2. Hose mounting portions 4 and 5 are integrally formed on the receiving metal fitting 2 and the insertion fitting 3, and the hoses 6 and 6 are attached to the hose mounting portions 4 and 5, respectively.

  A push ring 7 slidable in the axial direction is attached to the metal fitting 3. Further, a fitting groove 8 is provided on the outer periphery of the metal fitting 2 side, and an annular molded body 9 having a luminous performance made of a luminous material-containing EPDM rubber is fitted into the fitting groove 8. The annular molded body 9 protrudes in a convex shape on the outer periphery of the metal fitting 2, and due to the presence of the annular molded body having a phosphorescent performance made of the projected phosphorescent material-containing EPDM rubber, the fitting 1 and the hose terminal are It protects them from being worn or damaged when dragged on the road surface, and mitigates the impact of falling or crashing.

  EPDM rubber has better wear resistance and damage resistance than those made of silicone resin. As a result, joints fitted with a ring-shaped molded body made of EPDM rubber are particularly exchanged over a longer period of time. Even if it is not used, even if it is used repeatedly, the above-described phosphorescent effect and the induction effect to the return route can be exhibited.

The EPDM rubber contains 2 to 7% by weight of a conventionally used phosphorescent material in order to exhibit the phosphorescent light emitting effect. Preferably, the content of the phosphorescent material is 3 to 5% by weight. As the EPDM rubber, it is preferable to use a semi-transparent or transparent material, and by using a resin having transparency, it is possible to make the stored light emission more clearly visible. If the content of the phosphorescent material is less than 2% by weight, the luminous performance of the phosphorescent light emission (afterglow luminance) is inferior, which is not preferable. If it exceeds 7% by weight, the performance of the phosphorescent light emission changes according to the content. However, it is not preferable because the physical properties such as strength of EPDM rubber are inferior.

  The thickness of the annular molded body (difference between the outer diameter and the inner diameter) is preferably in the range of 6 to 9 mm in order to maintain the effect and durability of the phosphorescent emission over a long period of time. More preferably, it is 6-8 mm.

  In forming an annular molded body made of EPDM rubber, the crosslinking agent can be an organic peroxide-based material or a sulfur compound, and the former is relatively transparent. For example, 2,4-dichlorobenzoyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, 2,5- Dimethylhexane-2,5-di (peroxylbenzoate) or the like can be used as a crosslinking agent. When the latter sulfur compound is used for cross-linking, the transparency may be somewhat inferior and the phosphorescent light emission performance may be somewhat lowered, but a sufficiently high physical property can be obtained.

In addition, in the joint for fire hose of the present invention, when the maximum diameter portion of the metal fitting 2 that forms the maximum diameter portion of the joint is constituted by an annular molded body 9 having a phosphorescent performance made of a phosphorescent material-containing EPDM rubber, hose is connected, Ru can satisfactorily prevent the catch near portion by being Hikizurimawasa is subject to wear or damage.

As shown in FIG. 2, the fire hose joint of the present invention had phosphorescent light emitting performance made of a phosphorescent material-containing EPDM rubber so that the maximum diameter portion of the metal fitting 3 was formed in the metal fitting 3 as well. Ru HamaSosu an annular molded body 10 into the fitting groove 13. That is, in the present invention, the fire hose joint is a generic term that refers to the receiving metal fitting 2 and the fitting 3 respectively.

  2 shows another embodiment of the fire hose joint of the present invention, and shows a state in which the metal fitting 3 and the metal fitting 2 are engaged. 11 is a fastening ring, and 12 is a push ring.

  Such a configuration can satisfactorily prevent the metal fitting 3 from being damaged even when only the metal fitting 3 is exposed to an abrasion effect due to movement in a state where both the metal fittings 2 and 3 are not connected. Moreover, even when both the metal fittings 2 and 3 are connected and used for fire extinguishing work, the annular molded body 10 of the metal fitting 3 exhibits the wear resistance and damage resistance effect. Therefore, it is present as a partial structure of the joint without being particularly worn or damaged, and the desired phosphorescent light emitting effect and the induction effect to the return path are improved together with the phosphorescent annular molded body of the receiving metal fitting 2 It can be demonstrated greatly. In this aspect, generally, the annular molded body 10 on the side of the metal fitting 3 has a maximum diameter smaller than that of the annular molded body 9, so that the annular molded body 10 is less likely to be worn and damaged, and is almost intact even after repeated use over a long period of time. It is preferable because the phosphorescent performance can be exhibited.

1: Joint for fire hose 2: Receiving bracket 3: Insertion bracket 4: Hose mounting portion 5: Hose mounting portion 6: Hose 7: Push ring 8: Fitting groove (receiving bracket)
9: Annular molded body (receiving bracket) made of EPDM rubber containing phosphorescent material
10: Annular molded body (insert) made of EPDM rubber containing phosphorescent material
11: Fastening ring 12: Push ring 13: Fitting groove (fitting)

Claims (2)

An annular molded body comprising a translucent or transparent EPDM rubber containing 2 to 7% by weight of a phosphorescent material on the outer periphery of a joint body made of a tubular receiving metal fitting and an insertion fitting. There catch for fire hose protrudes convexly and characterized by being fitted to form a maximum diameter of said receiving metal and insert fittings.   The joint for a fire hose according to claim 1, wherein the content of the phosphorescent material of the annular molded body made of the EPDM rubber is 3 to 5% by weight.

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