JP2018013185A - Fastening and release structure of fire hose connection fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastening and release structure of fire hose connection fittings, facilitating a connection operation and a release operation of connection fittings without depending on a detachable specialized tool, and facilitating at emergency such as fire fighting, quickly and surely spreading through connection of fire hoses, and performing a recovery work through hose decomposition after the end of fire fighting.SOLUTION: A fastening and release structure of fire hose connection fittings is such that: a pair of right and left connection fittings are constituted by alternately forming a fitting projection and a fitting recess facing in an axial direction along a circumferential direction of a connection fitting body 10, forming an engaging projection in an outer peripheral surface head part of the fitting projection, and forming a semi-circular arc-shaped locking groove communicated with the fitting recess and having a wedge function, in a contact surface of the connection fitting body; and in the connection fittings, there are provided a rotary handling lever unit 20 constituted by adjacently pivoting base parts of a pair of right and left levers, in a connection fitting body outer peripheral surface, and the rotary handling lever unit 20 of the substantially same structure in the nearly opposite direction of the connection fitting body outer periphery.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a structure for tightening and releasing a fire hose coupling fitting including a detachable turning handling lever unit.

  Conventionally, there are coupling fittings for mutually connecting water supply hoses, pumps, transport pipes, and the like, and they are often used particularly for connecting fire hoses used in fire fighting operations.

  In such a fitting, two identical fittings with no distinction between males and females are used from the viewpoint of quickness and certainty of fire fighting work. A male-female engaging protrusion (hereinafter also referred to as a fitting protrusion) and an engaging groove (hereinafter also referred to as a fitting recess) are formed, and the engaging protrusion and the engaging groove are fitted in a torsion type. It is comprised so that the joint metal fitting of the same structure can be connected (for example, refer patent document 1).

  According to such a fitting, firstly, the fitting protrusions and fitting recesses formed along the circumferential direction of the respective fitting metal bodies are aligned by facing the coupling portions of two identically-structured fittings, and then If the fitting protrusion is fitted in the fitting recess, and both coupling metal fittings are rotated in the closed direction in the circumferential direction in this state, the fitting protrusion and the fitting recess having a wedge function are provided. Is slidably engaged along the same circumferential direction, and the coupling fittings are tightly coupled via the wedge function, and the engagement state is released by rotating in the opening direction so that the coupling fittings can be detached. Yes.

JP 09-119577 A

  By the way, the coupling fitting (hereinafter also simply referred to as torsional coupling fitting) that engages and disengages by such a rotating operation is not only connected to a general fire hose, but also a large-scale fire such as a complex. It is used to connect a fire hose for large-capacity foam discharge that has a large pipe diameter, such as during long-distance water supply in the event of an earthquake.

  Therefore, such a torsional coupling fitting can be tightly coupled with the fitting projection and the fitting recess with a wedge function, in particular, so as not to come off unexpectedly due to the high water pressure during the water discharge operation. It is configured.

Therefore, when performing hose processing operations such as torsional coupling and untwisting of coupling fittings at the site of fire extinguishing work, two dedicated attachment / detachment tools are used on the peripheral surface of each torsional coupling fitting using a dedicated wrench or other attachment / detachment tool. And the left and right torsional coupling fittings are rotated by one person or two persons in the opposite direction.

  In other words, using a wrench-like attachment / detachment tool composed of a pair of openable / closable arms via a support shaft, a plurality of engagement parts such as knurls formed at the tip of each are provided on the outer peripheral surface of each coupling metal body When the two fittings are rotated in the closing direction, which is the reverse circumferential direction, by operating the dedicated mounting tool, the fitting protrusions are in the wedge-shaped fitting recesses. The coupling fittings can be firmly coupled to each other, and the coupling fittings can be detached by rotating in the reverse opening direction.

  In this way, the attachment / detachment operation of the torsional coupling fitting always requires a dedicated attachment / detachment tool, and when using the attachment / detachment exclusive tool, an engagement portion such as a knurling formed at the distal ends of a pair of openable / closable arms is used. Since it is operated by engaging with the engaging convex part on the outer peripheral surface of the main body, if the fitting protrusion and fitting concave part of the two left and right torsional coupling fittings are excessively tightened, the wrench There is a risk that the dedicated tool for attaching / detaching slides on the engaging convex portion of the outer peripheral surface of the coupling metal body and the coupling metal body does not rotate.

  In addition, when performing work to connect and lay a number of fire hoses of a certain standard over a long distance, the number of dedicated attachment / detachment tools must be used for each of a large number of connecting brackets provided at the connecting parts of a number of hoses. Since there is a limit to the number of people who can carry it, it is difficult to connect the fittings together by multiple people, which can cause a large fire accident in the fire fighting work.

  Furthermore, the dedicated attachment / detachment tool is increased in size according to its pipe diameter, and various standard tools must be prepared, and it is inconvenient to always carry various tools and to store them. It was.

  The present invention has been made in view of such circumstances, and a conventional attaching / detaching tool can be used. On the other hand, a rotary handling lever unit is provided in advance in the coupling metal body in advance as an attaching / detaching tool. In spite of this, it is possible to facilitate the joining and releasing operations of the metal fittings, and in the event of an emergency such as a fire fighting operation, quick and reliable laying by connecting fire hoses and recovery work by disassembling the hose after the completion of the fire fighting work Provide a structure for tightening and releasing a fire hose coupling that can be easily performed.

  In order to solve the above-described conventional problems, the present invention forms a fitting protrusion and a fitting recess alternately in the axial direction along the circumferential direction of the coupling metal body, and the outer peripheral surface of the fitting protrusion. In a pair of left and right coupling fittings formed with an engaging protrusion on the head and a semicircular arc shaped locking groove communicating with the fitting recess and having a wedge function on the joint surface of the coupling fitting body A rotating handling lever unit constructed by pivotally supporting a base portion of a pair of left and right levers in the proximity state is provided on the outer peripheral surface of the coupling metal body, and a rotating handling lever unit having substantially the same structure is provided on the outer periphery of the coupling metal body. The present invention provides a tightening and releasing structure for a fire hose coupling fitting, which is also provided in the facing direction.

  Further, the tightening and releasing structure for the fire hose coupling fitting according to the present invention has the following features.

  The left and right levers constituting the rotating handling lever unit are formed in a curved shape along the outer peripheral surface of the coupling metal body, and can be foldably stored on the outer circumferential surface of the coupling metal body. Being configured so that the back surfaces come into contact with each other when the left and right levers are upright, resulting in an integrated handle structure.

  A knurled groove is formed on the outer peripheral side surface of the left and right levers that come into contact in an upright state during the rotation handling work to prevent sliding between the back surfaces.

  A plurality of rotating handling lever units having substantially the same structure are provided in a substantially opposing direction on the outer periphery of the coupling metal body.

  According to the first aspect of the present invention, the fitting protrusions and the fitting recesses are formed alternately along the circumferential direction of the fitting body, and are engaged with the outer peripheral surface head of the fitting protrusion. In a pair of left and right coupling fittings formed by forming a protrusion and forming a semicircular arc-shaped locking groove having a wedge function and communicating with the fitting recess on the joint surface of the coupling fitting main body, A rotating handling lever unit constructed by pivotally supporting the bases of a pair of left and right levers in the proximity state is provided on the outer peripheral surface, and a rotating handling lever unit having substantially the same structure is also provided in a substantially opposite direction of the outer periphery of the coupling metal body. For this reason, the rotating handling lever unit of the two coupling metal bodies is integrally attached to the pair of left and right coupling metal fittings, and when necessary, the rotating handling lever unit is assembled and transformed into a lever structure for operation. about This eliminates the need to carry a conventional dedicated tool for attachment and detachment, makes it easy to lay and connect standard fire hoses at the fire extinguishing work site, and enables quick start of the fire extinguishing work. There is an effect that can contribute to improvement of sex.

  Furthermore, the structure that assembles the rotating handling lever unit and transforms it into a lever structure is the base pivot structure of the left and right levers on the outer peripheral surface of the coupling bracket body, so that it can be a simple and inexpensive structure, and Since the assembly of the rotating handling lever unit is completed by a simple operation of raising the left and right levers, it is easy to release the coupling bracket, so the hose connection can be efficiently and safely removed at the fire extinguishing site. effective.

  In particular, when the operator grips the left and right levers of the rotating handling lever unit and operates to rotate in the reverse direction, the fitting protrusions are twisted and tightened in the fitting recess. Operators engaged in fire extinguishing work without the need for particularly great skill because operations can be easily performed because the coupling fittings can be firmly joined to each other, and the coupling fittings can be detached by rotating in the opening direction. However, anyone can easily perform the hose disconnection work at any time.

  In addition, while conventional attachment / detachment tools can be used, the joining and releasing operations of the fittings can be performed accurately and easily without using the attachment / detachment tool, so the operator can select it according to the situation at the site. In addition, the conventional handling tool and the rotating handling lever unit that is the tightening and releasing structure of the fire hose coupling fitting of the present invention can be used, and the fire hoses can be connected quickly and reliably in an emergency such as fire fighting activities. There is an effect that the work related to the optimal hose connection can be selectively and securely performed while judging the situation at the fire fighting work site such as the recovery work by the hose dismantling after the laying and fire fighting work.

According to the second aspect of the present invention, the left and right levers constituting the rotating handling lever unit are formed in a curved shape along the outer peripheral surface of the coupling metal body, and can be foldably accommodated on the outer circumferential surface of the coupling metal body. As a result, when the left and right levers are stored in a foldable manner, they are folded together on the peripheral surface of the coupling bracket, while the coupling bracket connected to the fire hose slides on the ground during coupling operations and fire fighting activities. In addition, it is possible to prevent the occurrence of damage such as buckling, and after the hose is disassembled, there is an effect that the firefighting hose can be stored and stored without the joint metal fitting integrated with the fire hose being bulky.

  Furthermore, since the back surfaces are in contact with each other when the left and right levers are upright during the rotation handling operation, the back surface is in contact with each other when the left and right levers are upright during the rotation handling operation. The handle structure makes it easier for the operator to grip the left and right levers, especially when the left and right levers are semicircular arcs along the circumference of the fitting, and the left and right levers are half-warped back to back when standing. The grip force is easily concentrated on the center bottom position of the half warp, and the grip force can be effectively transmitted to the rotational stress necessary for the rotation of the coupling fitting.

  According to the third aspect of the present invention, the knurled grooves for preventing the sliding of the back surfaces are formed on the outer peripheral side surfaces of the left and right levers that contact the standing state during the rotation handling operation. When the outer peripheral side surfaces of the left and right levers come into contact with each other, the concave and convex portions of the knurled grooves can be engaged to lock and hold the left and right levers in contact. By adjusting the stop position, there is an effect that the rotation handling lever unit can be displaced to a desired angle that is easy for the operator to handle the rotation.

  According to the fourth aspect of the present invention, the rotating handling lever unit having substantially the same structure is provided also in the substantially opposing direction of the outer periphery of the coupling bracket body, so that two workers can rotate the two coupling brackets facing each other. If the left and right levers of the dynamic handling lever unit are raised and the left and right levers are held together with both hands and rotated about the tube center axis, the fitting protrusions can be removed from the fitting recesses or tightened and connected. In addition to the effect that the attaching / detaching work can be easily performed, even in the case of the hose connection releasing work alone according to the situation at the site, the same effect can be obtained by substantially the same operation as described above.

It is explanatory drawing which shows the usage example of the coupling metal fitting of embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the coupling metal fitting of embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the coupling metal fitting of embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the coupling metal fitting of embodiment which concerns on this invention. It is explanatory drawing which shows the joining state of the coupling metal fitting of embodiment which concerns on this invention. It is explanatory drawing which shows the fastening and releasing structure of the coupling metal fitting of embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the rotation handling lever unit of the coupling metal fitting of embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the accommodation stopper mechanism of the left-right lever of the coupling metal fitting of embodiment which concerns on this invention.

  In the present invention, a conventional attaching / detaching tool can be used, and a rotating handling lever unit is provided in advance in the coupling metal body, so that the joining operation and the releasing operation of the coupling metal parts can be easily performed without using the attachment / detachment tool. In the event of an emergency such as a fire extinguishing operation, the fire hose can be quickly and reliably connected by connecting the hoses and the recovery work by disassembling the hose after the fire extinguishing work can be easily performed.

  Particularly, the fire hose coupling fitting tightening and releasing structure according to the present invention is characterized by alternately forming fitting projections and fitting recesses that are axially directed along the circumferential direction of the coupling fitting body. An engaging protrusion is formed on the outer peripheral surface of the mating protrusion, and a semicircular arc-shaped locking groove that communicates with the fitting recess and has a wedge function is formed on the joint surface of the coupling metal body. In the pair of left and right coupling brackets, a rotating handling lever unit configured by pivotally supporting the base portions of the pair of left and right levers in the proximity state is provided on the outer peripheral surface of the coupling bracket main body, and the rotating handling lever unit having substantially the same structure is provided. It is characterized in that it is also provided in the substantially opposite direction of the outer periphery of the coupling metal body.

  FIG. 1 is an explanatory diagram showing a state in which a pair of joined metal fittings F and F ′ is tried to be tightened or released using a rotating handling lever. That is, as shown in FIG. 1, the coupling fittings F and F ′ to which the fire hoses 30 and 30 ′ are connected are composed of a pair of coupling fitting bodies 10 and 10 ′ having the same structure. When the operator grips the rotating handling lever units 20 and 20 ′ provided in the respective coupling metal bodies 10 and 10 ′ as a structure for tightening and releasing the metal fittings to perform the joining operation or the releasing operation, the coupling metal body 10 is obtained. 10 'is tightened or released. Hereinafter, the configuration of the fittings F and F ′ having the tightening and releasing structure according to the present embodiment will be described with reference to the drawings.

[1. (Torsion type coupling bracket)
First, the configuration of the torsional coupling fittings F and F ′ according to this embodiment will be described. FIG. 2A shows the configuration of the pair of fittings F and F ′ before joining, and FIG. 2B is an explanatory view showing the fitting wedge function between the locking groove and the engaging protrusion. . Moreover, FIG. 3 is explanatory drawing which shows the structure of the joint surface of the coupling metal fitting in an axial view. FIG. 4 shows the configuration of the joints F and F ′ before joining in a side view. FIG. 5A shows a state where the coupling fittings F and F ′ are loosely fitted in a side view, and FIG. 5B shows a state where the coupling fittings F and F ′ are joined. Yes. 4 and 5, the alternate long and short dash line indicates the axis of the fittings F and F ′, the upper side of the axis being a side cross section, and the lower side being the outer side.

  As shown in FIG. 2A, the torsional coupling fittings F and F ′ are paired with a pair of coupling fitting bodies 10 and 10 ′ having the same structure, and can be coupled to each other by surface contact at the coupling facing portion. In this way, the mating protrusions 11 and 11 ′ and the fitting recesses 12 and 12 ′ are formed on the coupling facing portion, that is, the joint surfaces 13 and 13 ′, so that the sealing connection is possible.

  That is, as shown in FIG. 3, the single fitting F is formed by alternately forming fitting projections 11 and fitting recesses 12 in the axial direction along the circumferential direction of the fitting main body 10. An engaging protrusion 11a is formed on the outer peripheral surface of the portion 11, and a semicircular arc-shaped locking groove 12a having a wedge function is formed on the joint surface 13 of the fitting body 10 and communicates with the fitting recess 12. Configured.

  Further, as shown in FIG. 4, hose joint rings 14 and 14 'are rotatably fitted on the inner peripheral surfaces of the coupling metal bodies 10 and 10'. As shown in FIG. 1, the outer ends of the hose coupling rings 14 and 14 ′ are externally connected and fixed to the ends of the fire hose 30 and 30 ′ made of cloth whose inner peripheral surface is water-resistant. The hose joint rings 14 and 14 'are rotatable together with the connected fire fighting hoses 30 and 30' via the interior parts of the coupling metal bodies 10 and 10 '.

  Sawtooth hose attachment portions 14a and 14a are formed on the outer peripheral surface of the other end of the hose coupling rings 14 and 14 '. And the end part of fire hose 30 and 30 'is inserted in this hose attachment part 14a and 14a', and the inner peripheral surface of fire hose 30 and 30 'is hose-attached by the caulking cylinder from the outer peripheral surface of fire hose 30 and 30'. The fire hoses 30 and 30 ′ are attached by pressing the portions 14a and 14a ′.

  In this way, the fire hose 30, 30 ′ is connected to the joint metal body 10, 10 ′ via the rotatable hose joint rings 14, 14 ′, so that the joint metal body 10, 10 at the fire fighting activity site. When uncoupling ', the coupling fittings F and F' are twisted or rotated so that the hose coupling rings 14 and 14 'that are rotatable do not cause twisting of the fire hoses 30 and 30'. Connection and release operations between 10 'are easy and simple.

  As shown in FIGS. 2 and 3, the fitting protrusions 11 are formed so as to protrude in plural (three in this embodiment) at a predetermined interval along the circumferential direction of the joint surface 13 of the coupling metal body 10. Further, an engaging protrusion 11a is formed on the outer peripheral surface head.

  The fitting recess 12 is formed by cutting a plurality (three in the present embodiment) at predetermined intervals along the circumferential direction of the joint surface 13 of the coupling metal body 10 in the same manner as the fitting protrusion 11. As shown in FIGS. 4 and 5A, the shape of the fitting recess 12 and the fitting protrusion 11 is configured to be fitted in a complementary manner.

  As shown in FIG. 2B, a constant width, that is, a constant width that allows the engagement protrusion 11 a provided on the fitting protrusion 11 to slide is provided inside the joint surface 13 of the coupling metal body 10. A semicircular arc-shaped locking groove 12a is formed.

  Moreover, as shown in FIG. 3, one end opening of the locking groove 12a communicates with the fitting recess 12, and therefore, the engagement protrusion 11a ′ of one coupling metal body 10 ′ is connected to the other coupling. When the right and left coupling metal fittings F and F ′ are turned in the opposite directions while being fitted into the fitting recess 12 of the metal fitting body 10, the engagement protrusion 11 a ′ of the fitting protrusion 11 ′ communicates with the fitting recess 12. It penetrates into the locking groove 12a.

  At this time, since the locking groove 12a has a narrowed groove width from the tip to the base so as to have a wedge function, as shown in FIGS. As shown in FIG. 2B, the engaging protrusion 11a ′ of the fitting protrusion 11 ′ enters the narrow locking groove 12a as the F and F ′ are turned in opposite directions. As shown in FIG. 5 (b), the tightly wedged state is realized by the forward wedge function.

  In this way, the right and left coupling fittings F and F 'are rotated and twisted to complete the tightly coupled state. Usually, the fittings F and F ′ having the fitting recesses 12 and 12 ′ and the fitting protrusions 11 and 11 ′ are configured to be fitted in a complementary manner as described above, and the fitting recesses 12 and 12 ′. A fixed number of fire hoses 30 and 30 ′ having a predetermined length are connected and connected through a wedge function formed in the locking grooves 12 a and 12 a ′, and are connected and laid to a length necessary for fire fighting work. become.

[2. (Rotating handling lever unit provided on the peripheral surface of the coupling bracket)
As shown in FIGS. 1 to 5, the feature of the present invention is that the base portions of the pair of left and right levers 21L and 21R are pivotally supported in proximity to the outer peripheral surface of the above-described conventional fitting body 10 and 10 ′. The rotating handling lever units 20 and 20 ′ are provided, and the rotating handling lever units 20 and 20 ′ having substantially the same structure are also provided in the substantially opposing direction of the outer periphery of the coupling metal bodies 10 and 10 ′. The fire hose coupling fittings can be easily and easily assembled by assembling the rotating handling lever units 20 and 20 'integrated with the fitting main bodies 10 and 10' without using a dedicated attachment / detachment tool. .

  Hereinafter, the structure of the rotation handling lever units 20 and 20 'according to the present embodiment will be described in detail with reference to the drawings. FIG. 6A shows a state before the rotating torsional joining of the coupling fittings F and F ′ by the rotating handling lever units 20 and 20 ′, and FIG. 6B shows the rotating handling lever units 20 and 20 ′. The state after rotating torsional joining by 'is shown. FIG. 7A shows the stowed state of the left and right levers 21L and 21R of the coupling fitting F as viewed in the axial direction, and FIG. 7B shows the standing state of the left and right levers 21L and 21R.

  That is, as shown in FIGS. 6 and 7, the rotating handling lever unit 20 is formed by pivotally supporting the bases of the pair of left and right levers 21 </ b> L and 21 </ b> R close to each other on the outer peripheral surface of the coupling metal body 10. 2-7, 22 has shown the pivot shaft of the base of left-right lever 21L, 21R.

  A rotating handling lever unit 20 having substantially the same structure is disposed on the outer peripheral surface of the coupling metal body 10 in a substantially opposing direction of the rotating handling lever unit 20.

  As shown in FIG. 7, the left and right levers 21L and 21R of the rotating handling lever unit 20 are configured to be able to stand up and be deformed from the outer peripheral surface of the coupling metal body 10 when necessary. There is no need to carry a conventional detachable tool.

  By configuring in this way, as shown in FIG. 6 (a), the left and right coupling fittings F, F ′ are respectively rotated in reverse directions and twisted via the rotating handling lever units 20, 20 ′. As shown in FIGS. 4, 5, and 6 (b), the connection between the fittings F and F ′ is completed, and the standard fire hose connection and installation work at the fire extinguishing work site is facilitated. Fire extinguishing work can be started quickly, and safety at the fire extinguishing work site can be improved.

  Further, the left and right levers 21L and 21R constituting the rotating handling lever unit 20 are formed in a curved shape along the outer peripheral surface of the coupling metal body 10 as shown in FIGS. 10 can be foldably stored on the outer peripheral surface.

  Therefore, as shown in FIG. 7A, when the left and right levers 21L and 21R are foldably housed, they are folded together with the peripheral surface of the coupling metal body 10.

  Further, as shown in FIGS. 7 and 8, the left and right levers 21L and 21R in the rotating handling lever unit 20 are provided with a storage stopper mechanism 23 so that the left and right levers 21L and 21R can be fixed to the peripheral surface of the coupling metal body 10 when stored. . FIG. 8A shows the configuration of the storage stopper mechanism 23 before the lever 24 is stored, and FIG. 8B shows the configuration of the storage stopper mechanism 23 after the lever 24 is stored.

  That is, as shown in FIG. 8 (a), a bending spring 23a is provided on the stepped surface of the large-diameter step portion of the peripheral surface of the coupling metal body 10, and when the lever is stored, as shown in FIG. 8 (b). The lower end surfaces 21a and 21a 'of the left and right levers 21L and 21R are in sliding contact with the upper surface 23b of the bending spring 23a, and the left and right levers 21L and 21R are moved from the pivot shaft 22 of the base by the repulsive force of the bending spring 23a. It is configured to be fixed so as not to rotate unintentionally.

  By adopting such a storage form, the coupling fittings F and F ′ connected to the fire hoses 30 and 30 ′ can be used to prevent the left and right levers 21L and 21R from standing up and protruding inadvertently during connection work or fire fighting activities. Even if it slides, it can prevent the occurrence of damage such as buckling, and after disassembling the hose, the joint fittings F and F ′ integrated with the fire hoses 30 and 30 ′ can be stored and stored without being bulky.

  Furthermore, since the left and right levers 21L and 21R stand up in a state where the left and right levers 21R and 21R stand up during the rotation handling work, the back surface comes into contact with the left and right levers 21L and 21R during the rotation handling work. The integrated handle structure is in contact with each other, making it easier for the operator to grip the left and right levers 21L, 21R.

  In particular, the left and right levers 21L and 21R have a semicircular arc shape along the peripheral surfaces of the coupling fittings F and F ′, and the left and right levers 21L and 21R are half-warped back to back when standing, as shown in FIG. The grip force at the time of gripping by hand is easily concentrated on the center bottom position of the half-warp, and the grip force can be effectively transmitted to the rotational stress necessary for the rotation of the coupling fittings F and F ′.

  Furthermore, as shown in FIGS. 2 to 7, the back surfaces of the left and right levers 21L, 21R are prevented from sliding on the backs of the outer peripheral side surfaces of the left and right levers 21L, 21R that are in a standing state during the rotation handling work. For this purpose, knurled grooves 24L and 24R are formed.

  With this configuration, the concave and convex portions of the knurled grooves 24L and 24R can be engaged with each other to hold the left and right levers in contact with each other, and the outer peripheral side surfaces of the left and right levers 21L and 21R can be held together. By adjusting the abutment locking position, the rotation handling lever units 20 and 20 ′ are rotated to a desired angle at which the operator can easily handle the rotation, for example, to an angle position indicated by a two-dot chain line in FIG. 7B. The dynamic handling lever unit 20 can be displaced.

  Finally, the description of each embodiment described above is an example of the present invention, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from the scope of the present invention. Of course, it is possible to change.

F Fitting fitting 10 Fitting fitting body 11 Fitting protrusion 12 Fitting recess 13 Joining surface 14 Hose fitting ring 20 Rotating handling lever unit 21R Right lever 21L Left lever 22 Pivoting shaft 23 Storage stopper mechanism 24L, 24R Knurled groove

Claims (4)

The fitting protrusions and the fitting recesses are formed alternately in the axial direction along the circumferential direction of the coupling fitting body, and the engagement fitting is formed on the outer peripheral surface of the fitting projection, and the coupling fitting In a pair of left and right coupling fittings configured to form a semi-arc-shaped locking groove that communicates with the fitting recess on the joint surface of the main body and has a wedge function,
A rotating handling lever unit configured by pivotally supporting a base portion of a pair of left and right levers in the proximity state is provided on the outer peripheral surface of the coupling metal body, and the rotational handling lever unit having substantially the same structure is substantially opposed to the outer periphery of the coupling metal body. Tightening and releasing structure for fire hose coupling fittings, which is also provided in the direction.   The left and right levers constituting the rotating handling lever unit are formed in a curved shape along the outer peripheral surface of the coupling metal body, and can be foldable on the outer peripheral surface of the coupling metal body. 2. The structure for tightening and releasing a fire hose coupling bracket according to claim 1, wherein the back surfaces are in contact with each other when the lever is upright to form an integral handle structure.   The fire fighting machine according to claim 1 or 2, wherein a knurled groove for preventing sliding between back surfaces is formed on an outer peripheral side surface of the left and right levers in contact with a standing state during a rotating handling operation. Tightening and releasing structure for hose fittings. The tightening and releasing structure for a fire hose coupling bracket according to any one of claims 1 to 3, wherein a plurality of rotating handling lever units having substantially the same structure are provided in a substantially opposing direction on the outer periphery of the coupling bracket body.

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