JP4820707B2 - Impact mitigation devices such as water hose connection fittings and fasteners - Google Patents

Description

  The present invention relates to, for example, a connection fitting attached to an end of a water supply hose such as a fire hose, and an impact mitigation device such as a fastener for fastening and fixing the connection fitting to the water supply hose.

Generally, a fire hose is provided with a connection fitting and a water supply nozzle at the end of the hose body. Insert the base end of the connection fitting or water supply nozzle into the end of the hose body, and tighten and fix it from the outside of the hose body with a binding (binding) so that the connection fitting and water supply nozzle cannot be removed from the end of the hose body. Like that.
There are various types of fasteners, but a split type as shown in FIGS. 16 (a) and 16 (b) is common. That is, the fastener body 1 is divided into three parts each having a circumferential direction of 120 °, and each shape is formed by an arcuate piece 2. Protrusions 3 projecting in the outer diameter direction are provided at both ends of the metal piece 2, and a ring that fits a hose body (not shown) is formed by abutting the projecting parts 3 with each other. ing.
A bolt hole 4 is provided in the tangent direction of the fastener body 1 in the protrusion 3, and a bolt 5 is inserted from the bolt hole 4 of one protrusion 3 into the bolt hole 4 of the other protrusion 3. The nut 6 is screwed and tightened to connect the metal piece 2 and reduce the diameter of the main body 1 to fix the hose body and the connection metal.
Fire extinguishing hoses are harshly handled or dragged on the streets, building floors, stairs, etc. during fire extinguishing work. Therefore, the connection fitting for connecting the hose bodies to each other and the fastening fitting for fixing the hose body and the connection fitting may collide violently with the obstacle.

Therefore, in order to improve visibility during fire extinguishing work at night, etc., a reflective material is affixed to the connection fitting, and an elastic band is provided on the outer periphery of the reflective material to prevent wear of the reflective material. There is one in which the impact at the time of dropping or impact of the hose is reduced (for example, see Patent Document 1).
In addition, for example, a large capacity water supply hose used in a large capacity foam radiation system that can cope with a large fire such as an oil storage tank fire in an oil complex has a diameter of 400 mm and a standard length of the hose of 150 m. There is also. Similarly, connecting metal fittings are connected to both ends of such a large-capacity water supply hose by fasteners.

Such a large-capacity water supply hose is usually wound around the drum of an extension car. During the extension, the drum is driven to rotate and the large-capacity water supply hose is turned on the ground etc. Although they are connected to each other by performing an operation to join them together, the connection fittings and fasteners may collide with obstacles and receive a large impact during fire extinguishing work.
JP-A-8-71172

As described above, since the fire hose is handled roughly during the fire fighting operation, the connection fitting and the fastening fitting may violently collide with an obstacle and be deformed or damaged. Further, even in the case of the large capacity water supply hose described above, it may be accidentally dropped from a high place and the impact may cause damage to the connection fittings and fasteners.
For example, if firefighting hose fittings are damaged or firefighting hoses are pulled out of the fittings while fire extinguishing is underway, high water pressure is applied to the firefighting hose. A large amount of water is discharged all at once from the end of the fire hose.
At this time, there is no problem if the end of the fire hose is constrained, but if the end of the fire hose is in the released state, the end of the fire hose will be violated by the pulsating water pressure (the end of the hose Sway violently up and down, left and right). If the fire hose has a relatively small diameter (for example, a diameter of several tens of millimeters), even if the water pressure is high, the cross-sectional area is small, so the total force due to the water flow is within the range that can be suppressed manually, and restrains the rampage. However, when it becomes a large capacity water supply hose, the diameter becomes several hundred mm, and since it is discharged at a high pressure at once, the rampage cannot be restrained manually, and there is a danger.
Further, the one of Patent Document 1 is such that the connection fitting (joint) has a cylindrical shape and an elastic band is fitted to the outer peripheral surface thereof, and can be applied to a cylindrical shape like the connection fitting. As shown in FIG. 4, the fastener body 1 is divided into three parts by 120 ° in the circumferential direction, and the protrusions 3 protruding in the outer diameter direction at both ends of the metal piece 2 have an uneven portion on the outer shape. There is a problem that the elastic band as described above cannot be fitted and is easily detached even if fitted.
The present invention has been made paying attention to the above circumstances, and the purpose of the present invention is to reduce the impact even if the connection fittings, fasteners, etc. of the water supply hose are subjected to an impact. To provide impact mitigation devices such as water hose connection fittings and fasteners that can prevent damage to the water supply hose.

  In order to achieve the above object, according to the present invention, the first aspect of the present invention provides a bolt for fastening the water supply hose and the connection metal fitting by tightening the end of the connection metal inserted into the end of the water supply hose from the outside of the water supply hose. An impact mitigating device for mitigating the impact of a fastener having a cushioning ring that is fitted and covered with a cushioning material so as to cover the entire outer peripheral surface of the fastener. A plurality of latching claws latched on the fastener are provided.

  According to a second aspect of the present invention, the buffer ring according to the first aspect is provided with an opening window capable of adjusting the bolt.

Claim 3 is a circle in which a fastener for fastening the water supply hose and the connection fitting by fastening the end of the connection fitting inserted into the end of the water supply hose from the outside of the water supply hose is divided into a plurality in the circumferential direction. An impact mitigation device that consists of arc-shaped metal fitting pieces, with protrusions projecting in the outer diameter direction at both ends of the metal fitting pieces, and mitigating the impact of the fasteners connected by bolts in a state where the protrusions are in contact with each other Then, a protective layer is coated on the outer peripheral surface of the fastener, and a protective socket for covering the protruding portion is attached to the metal piece.

According to a fourth aspect of the present invention, the outer diameter side that reduces the impact of the fastener having a bolt that fastens the end of the connection fitting inserted into the end of the water supply hose from the outside of the water supply hose and fixes the water supply hose and the connection fitting is provided. An impact relief device having a concavo-convex shape, which is a shock-absorbing ring that is fitted so as to cover substantially the entire outer peripheral surface of the fastener and is integrally formed of a shock-absorbing shock-absorbing material. However, it is characterized in that it has a substantially U-shaped cross section and a circular shape continuous in the circumferential direction.

  According to the present invention, for example, when handling a fire hose or the like, even if the connection fitting / fastening bracket receives an impact, the impact can be mitigated to prevent damage to the connection fitting / fastening bracket, etc. There is an effect that the concavo-convex portion is securely held in the outer shape of the fastener or the like, and there is no risk of dropping off.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 show a first embodiment of an impact mitigation device such as a water hose connection fitting and a fastener, and FIG. 1 shows that a first water hose and a second water hose are connected via a connection fitting. 2 is a side view of the state, FIG. 2 shows a buffer ring, (a) is a left side view, (b) is a right side view, FIG. 3 shows a state where the buffer ring is fitted to the fastener, and (a) is a side view. FIG. 5B is a cross-sectional view taken along the line AA, and FIG. 5C is a cross-sectional view taken along the line BB.

As shown in FIG. 1, 11 is a first water supply hose such as a fire hose, 12 is a second water supply hose such as a fire hose, and the first and second water supply hoses 11 and 12 have a diameter of, for example, 400 mm. For example, hoses used in large-capacity foam radiation systems that can handle large fires such as when a fire occurs in an oil storage tank of an oil complex, but are not limited to this. It is not something.
The first and second water supply hoses 11 and 12 are ends of a flexible hose main body 14 including a jacket 13 and a lining layer (not shown) such as rubber lined on the inner peripheral surface of the jacket 13. The connection fitting 15 is provided in the portion, and the connection fitting 15 can be extended by joining each other. The connection fitting 15 is provided with a connection tube 16 to be inserted into the end of the hose body 14. The connection tube 16 is fastened by a fastening member 17 from the outside of the hose body 14, and the connection fitting 15 is attached to the hose body 14. It is fixed.

  The fastener 17 is divided into three portions of 120 ° in the circumferential direction, and each shape is formed by an arcuate fitting piece 18. Protrusions 19 projecting in the outer diameter direction are provided at both ends of the metal pieces 18, and a ring that fits the hose body 14 is formed by abutting the projecting parts 19. A bolt hole 20 is provided in the projecting portion 19 in the tangential direction of the fastener 17, and a bolt 21 is inserted from the bolt hole 20 of one projecting portion 19 into the bolt hole 20 of the other projecting portion 19. By screwing and tightening 22, the fastening member 17 is reduced in diameter, and the connection fitting 15 is fastened to the hose body 14. Further, the fastening member 17 is formed with a thick portion 17a on the side of the connection fitting 15 and a thin portion 17b on the side opposite to the connection fitting 15, and a skirt portion 17c is formed on the thin portion 17b side.

  Further, a buffer ring 23 which is an impact mitigating device of the present invention is fitted to the fasteners 17 attached to the first and second water supply hoses 11 and 12. The buffer ring 23 is an annular body made of a rubber or synthetic resin buffer material having a substantially U-shaped cross section so as to cover the entire outer peripheral surface of the fastener 17. The buffer ring 23 is provided with a joining portion 24 that joins the thick portion 17a of the fastener 17 at one end, and a contact portion 25 that comes into contact with the skirt portion 17c at the other end. Further, a plurality of latching claws 26 that are latched on the end of the thin portion 17b are provided on the abutting portion 25 side at intervals in the circumferential direction. Accordingly, the buffer ring 23 covers the entire fastener 17, and for example, during the fire extinguishing operation, the first and second water supply hoses 11 and 12 are dragged on the road, the floor of the building, the stairs, etc. Even if it collides violently and receives a large impact, the buffer 17 protects the fastener 17 and the fastener 17 is not damaged.

FIG. 4 shows a modification of the first embodiment, in which a buffer ring 23 is provided with an opening window 27 facing the head of the bolt 21 of the fastener 17, and the buffer ring 23 is fitted to the fastener 17. Even so, the bolt 21 can be tightened from the opening window 27.
5 and 6 show the second embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. 5A is a side view before the buffer cover is attached, FIG. 5B is a side view after the buffer cover is attached, and FIG. 6 is a perspective view of the buffer cover. The impact mitigating device of the present embodiment is a buffer cover 28 that is wound so as to cover the entire outer peripheral surface of the fastening member 17 and the connected connection member 15, and urethane is used as a buffer material on the back surface of the rectangular cover body 29. For example, two binding members 31 made of Velcro (registered trademark) for binding the buffer cover 28 to the outer peripheral surface of the fastening member 17 and the joined connection fitting 15 are provided on the surface.

  According to the present embodiment, as shown in FIG. 5B, the buffer cover 28 is wrapped around the outer periphery of the fastening member 17 and the connected connecting member 15 to cover them, and is bound by the binding member 31. As a result, the outer periphery of the fastener 17 and the joined connection fitting 15 is covered with the urethane foam 30 as a cushioning material.

  Therefore, for example, during the fire extinguishing operation, the first and second water supply hoses 11 and 12 are dragged on the road, the floor surface of the building, the stairs, etc. In addition, the buffer cover 28 protects the fastener 17 and the connection bracket 15 and the fastener 17 are not damaged.

  7 to 9 show a third embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. 7 is a front view of the shock-absorbing ring, FIG. 8 is a front view of the shock-absorbing ring attached to the fastener, and FIG. 9 is a cross-sectional view taken along the line CC in FIG. The shock-absorbing ring 32 that is the impact mitigating device of this embodiment is fitted on the outer peripheral surface 17 d of the fastener 17. A concave groove 33 having a substantially U-shaped cross section in the circumferential direction is provided on the outer peripheral surface 17 d of the fastener 17, leaving the protruding portion 19. The buffer ring 32 is an annular body made of a buffer material of rubber or synthetic resin, and a convex portion 32a inserted into the concave groove 33 of the fastener 17 and a concave portion 32b fitted to the protruding portion 19 are provided on the inner peripheral portion thereof. It has been.

  And when the main part of the buffer ring 32 is fitted on the outer peripheral surface of the fastener 17, it protrudes from the outer peripheral surface 17 d of the fastener 17 to cover and protect the entire fastener 17. Therefore, for example, during the fire extinguishing operation, the first and second water supply hoses 11 and 12 are dragged on the road, the floor of the building, the stairs, etc. The buffer ring 32 protects the fastener 17 from being damaged.

Also in the present embodiment, an opening window (not shown) is provided in the buffer ring 32 so as to face the head of the bolt 21 of the fastener 17, and the buffer ring 32 is opened even when the buffer ring 32 is fitted to the fastener 17. The bolt 21 can be tightened from the window.
10 to 12 show a fourth embodiment, and the same components as those in the third embodiment are denoted by the same reference numerals and description thereof is omitted. 10 is a front view of a state where the O-ring is attached to the fastener, FIG. 11 is a side view of the state where the O-ring is attached to the fastener, and FIG. 12 is a cross-sectional view taken along the line DD of FIG. An O-ring 34 that is an impact mitigating device of this embodiment is fitted on the outer peripheral surface 17 d of the fastener 17. The outer peripheral surface 17d of the fastener 17 is provided with a concave groove 35 having a substantially arc-shaped cross section in the circumferential direction, leaving the protruding portion 19.

  When the main portion of the O-ring 34 is fitted to the outer peripheral surface of the fastener 17, the O-ring 34 protrudes from the outer peripheral surface 17 d of the fastener 17 to cover and protect the entire fastener 17. Therefore, for example, during the fire extinguishing operation, the first and second water supply hoses 11 and 12 are dragged on the road, the floor of the building, the stairs, etc. This prevents the O-ring 34 from protecting the fastener 17 from being damaged.

13 and 14 show a fifth embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. 13 is a front view showing a state in which the protective socket is attached to the fastener, and FIG. 14 is a cross-sectional view taken along the line EE of FIG. The protective socket 36, which is an impact mitigation device of this embodiment, has a U-shaped cross section made of a cushioning material such as rubber or synthetic resin so as to be fitted to the protrusion 19 of the fastener 17. The protective socket 36 is provided with engagement claws 37a and 37b bent inward at the opening end, and these engagement claws 37a and 37b are engaged and fixed to the thick portion 17a and the thin portion 17b of the fastener 17. It is like that. Furthermore, the outer peripheral surface of the protective socket 36 is coated with a protective layer 38 such as an elastomer to prevent the surface from being damaged.
Therefore, for example, during the fire extinguishing operation, the first and second water supply hoses 11 and 12 are dragged on the road, the floor of the building, the stairs, etc. The protruding portion 19 is protected by the protective socket 36, and the fastener 17 is not damaged.

15A and 15B show a sixth embodiment, wherein FIG. 15A is a longitudinal side view of a state in which a buffer ring is fitted to a fastener, FIG. 15B is a side view of the buffer ring, and FIG. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. As shown in FIG. 16 (a), the outer diameter side of the fastener has an uneven shape. Therefore, the outer diameter side of the shock absorbing device in the state shown in FIG. .
In the present embodiment, the buffer ring 40 is an annular body made of a rubber or synthetic resin buffer material having a substantially U-shaped cross section so as to cover the entire outer peripheral surface of the fastener 17. The buffer ring 40 has a substantially U-shaped cross section before being fitted to the fastener 17 and has a continuous circular shape in the circumferential direction. The buffer ring 40 has a thick portion 17a of the fastener 17 at one end thereof. The other end portion is provided with an engaging portion 42 that engages with the thin portion 17b. Accordingly, the buffer ring 40 covers the entire fastener 17, and for example, during the fire extinguishing operation, the first and second water supply hoses 11 and 12 are dragged on the road, the floor of the building, the stairs, etc. Even if it collides violently and receives a great impact, the buffer ring 40 protects the fastener 17 and the fastener 17 is not damaged.

In each of the above-described embodiments, the first and second water supply hoses 11 and 12 have been described for a large-capacity water supply hose having a diameter of 400 mm. It can also be used for fire hose.
The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, the constituent elements over different embodiments may be combined.

The side view of the state which showed the 1st Embodiment of this invention and connected the 1st water supply hose and the 2nd water supply hose via the connection metal fitting. The buffer ring of the embodiment is shown, (a) is a left side view, (b) is a right side view. The state which fitted the buffer ring to the fastener of the embodiment is shown, (a) is a side view, (b) is a sectional view along the AA line, (c) is a sectional view along the BB line. The side view of the state which showed the modification of the embodiment and fitted the buffer ring in the fastener. The 2nd Embodiment of this invention is shown, (a) is a side view before attachment of a buffer cover, (b) is a side view after attachment of a buffer cover. The perspective view of the buffer cover of the embodiment. The front view of the buffer ring which shows the 4th Embodiment of this invention. The front view of the state which showed the same embodiment and attached the buffer ring to the fastener. Sectional drawing which shows the same embodiment and follows CC line of FIG. The front view of the state which showed the 5th Embodiment of this invention and attached the O-ring to the fastener. The side view of the state which showed the same embodiment and attached the O-ring to the fastener. Sectional drawing which shows the same embodiment and follows the DD line | wire of FIG. The front view of the state which showed the 5th Embodiment of this invention and attached the protective socket to the fastener. Sectional drawing which shows the same embodiment and follows the EE line | wire of FIG. The 6th Embodiment of this invention is shown, (a) is a vertical side view of the state which fitted the buffer ring to the fastener, (b) is a side view of a buffer ring, (c) is a half cross-sectional view. The conventional fastener is shown, (a) is a partially cutaway front view, (b) is a side view of the metal piece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11, 12 ... Water supply hose, 13 ... Hose body, 15 ... Connection metal fitting, 17 ... Fastener, 21 ... Bolt, 23 ... Buffer ring, 26 ... Hook

Claims (4)

An impact mitigating device for mitigating the impact of a fastener having a bolt for fastening the end of a connection fitting inserted into the end of a water supply hose from the outside of the water supply hose to fix the water supply hose and the connection fitting,
A buffer ring that is fitted and covered with a buffer material so as to cover the entire outer peripheral surface of the fastener, and the buffer ring is provided with a plurality of latching claws that are engaged with the fastener. An impact mitigation device for a water hose fastener, characterized by comprising:   The impact buffering device for a water hose fastener according to claim 1, wherein the buffer ring is provided with an opening window capable of adjusting the bolt. The end of the connection fitting inserted into the end of the water supply hose is tightened from the outside of the water supply hose to fix the water supply hose and the connection fitting. Is provided with protrusions protruding in the outer diameter direction at both ends of these metal pieces, and is an impact mitigation device for reducing the impact of the fasteners connected by bolts in a state where the protrusions are in contact with each other,
An impact mitigating device for a fastener for a water supply hose, wherein an outer peripheral surface of the fastener is coated with a protective layer, and a protective socket for covering the protrusion is attached to the metal piece. The end of the connection fitting inserted into the end of the water supply hose is tightened from the outside of the water supply hose to mitigate the impact of the fastener having a bolt for fixing the water supply hose and the connection fitting. A device,
A shock-absorbing ring that is fitted so as to cover substantially the entire outer peripheral surface of the fastener and is integrally formed of a shock-absorbing shock-absorbing material, and has a substantially U-shaped cross section before fitting. An impact mitigation device for a water hose clamp, characterized by a circular shape continuous in the direction.

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