JPH0141805Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention applies equal pressing force to multiple claws that are attached to and detached from the base of an underground fire hydrant, using a connecting rod that is pushed down by pulling up the operating lever. This invention relates to a fire hydrant standpipe whose claws are retracted.

BACKGROUND ART Conventionally, in this type of standpipe, an annular member piece was attached between each claw to push up three claws arranged at intervals on the same circumference at the joint with the base of an underground fire hydrant. The annular member, to which the annular member pieces are connected from below, is pulled upward by a handle protruding radially from the upper side of the stand pipe via two connecting rods fixed to the upper surface of the annular member. As a result, the fire hydrant was being attached and detached from the cap.

Problems to be Solved by the Invention By the way, in such a conventional standpipe, the three claws are connected to the two connecting rods provided at both radial ends of the annular member to raise the operating lever. Since it is raised by operation, 3
It is difficult to apply an even pulling force to each claw to open the standpipe evenly, and when removing the standpipe from the hydrant cap, the connection part of the cap may be damaged. Further, if at least one of the connecting rods is bent, a lifting force is applied to the annular member and it becomes operational, and the claw remains open and does not close, making it impossible to connect it to the mouthpiece of the fire hydrant. Furthermore, if the connecting rod breaks, it will not be possible to apply the large force required to pull the annular member upward, even if you use your hands or tools, so the stand pipe connected to the hydrant mouthpiece should be It was impossible to open the claw and remove the fire hydrant from the mouthpiece without operating the release ring.

Means for solving the problem In this invention, in order to solve the above problem,
An upper connecting member in which an outer pipe with a male thread and an inner pipe with a gasket attached to an annular groove on the inner surface are integrated at the upper end surface, and a single or double mouth whose lower end is fixed to the inner pipe of this member. a lower connecting member which is screwed onto the outer pipe of said member and has a hole approximately the same diameter as the inner pipe on its lower end face, and a flange portion is placed within the end face of this member and a riser pipe inside thereof. An annular claw seat has a set number of notches formed on its upper surface, and a leaf spring that presses the inner surface of the lower or upper connecting member is fixed to the back surface of the claw seat whose tips protrude inward from each of the notches. a pressing ring having an inverted conical surface that is fitted onto the outer periphery of the inner tube of the upper connecting member and engages with an inverted conical surface formed on the inner surface of the rising portion of the upper connecting member; An annular member that is pivotably mounted on the end face and supported diagonally upward at both sides at a center angle of 90 degrees from the pivot point by two pins that abut the upper face of the pressing ring through the end face; A standpipe for a fire hydrant is constituted by a connecting rod that connects the inclined upper end and the tip of an operating lever whose middle part is pivotally attached to handles protruding from the top of the pipe body on both sides.

Function The annular member, which is pivoted diagonally upward on the upper surface of the upper connecting member, is pushed down by the connecting rod that is lowered by pulling up the operating lever, and the two radially arranged annular members are Press the pin, and lower the pressing ring along the inner tube of the upper connecting member while keeping it horizontal. When the pressing ring is lowered, the square pawl that engages with the inverted conical surface formed on the outer circumferential surface is opened by retreating evenly along the pawl seat against the urging force of a leaf spring fixed to the back surface of the square pawl. Therefore, it is possible to connect the fire hydrant so that the tips of the claws do not come into contact with the mouthpiece when attaching and removing the fire hydrant.

Embodiment An embodiment of this invention will be described with respect to a single-mouth standpipe whose upper end is connected to one hose. Of course, the standpipe can also be applied to a double-end type standpipe whose upper end can be connected to two hoses on both the left and right sides.

Pipe body 1 whose upper end is bent horizontally
, a claw release ring 2 for releasing the connection with the claw of a hose (not shown) is slidably fitted into the small diameter portion 1a of the bent tip, and a horizontal handle protrudes to both sides in the opposite direction in front of the bent part. 3 is fixed. An operating lever 6 whose intermediate portion is pivoted by a pin 5 is attached to a mounting piece 4 fixed to one side of the handle 3. The operating lever 6 has a pipe body 1 at its tip.
A horizontal connecting rod 7 is pivotally connected to the pipe body 1, and the connecting rod 7 is connected to a hole 8 provided in a guide member 8 fixed to the pipe body 1.
a and is guided downward. Reference numeral 21 denotes a handle for carrying the standpipe, which is fixed to the outer peripheral surface of the bent portion of the upper end of the pipe body 1.

The lower end of the pipe main body 1 is fitted inside an inner tube 9b protruding from the upper end surface 9a of the upper connecting member 9, and the lower end surface is supported by an annular convex portion 9c formed within the inner tube 9b. The protruding part from is fixed by welding. The inner tube 9b has a U-shaped packing 1 in an annular groove 9d formed on the lower inner surface of the annular convex portion 9c.
0 is installed. The upper connecting member 9 includes an outer tube 9
A thread 11 is formed in e, and the male thread 11 includes:
A lower connecting member 12 is provided with a hole 12b having approximately the same diameter as the inner diameter of the inner tube 9b on the lower end surface 12a, and is screwed into the lower connecting member 12 at a female thread 13.

The lower connecting member 12 has an annular claw seat 14 placed on the inner surface of the lower end surface 12a. This annular claw seat 14
is formed of a flange part 14a placed on the inner surface of the lower end surface 12a, and a riser pipe 14b having the same inner diameter as the inner pipe 9b rising upward from the inside of the flange part 14a. Four cutouts 14c are provided.

Four L-shaped claws 15 placed on claw seats 14 are housed in a space S formed by the screwing of the upper connecting member 9 and the lower connecting member 12. This claw 15 has a plate spring 16 pressed against the inner surface of the lower connecting member 12 spot-welded to the back surface thereof, and the tip of the claw slightly protrudes inward from the notch 14c. The L-shaped claw 15 has an inwardly inclined surface 15a directed upwardly on the lower surface of the tip of the claw, and an inverted conical surface 15b on the inner surface of the rising portion. Reference numeral 17 denotes a pressing ring fitted onto the outer periphery of the inner tube 9b of the upper connecting member 9. On the outer peripheral surface of the pressing ring 17, an inverted conical surface 17a that engages with the inverted conical surface 15b of the pawl 15 is formed. It is in contact with 15. The upper connecting member 9 has a pressing ring 17 in the radial direction of the upper end surface 9a.
Through-holes 9f are provided at two positions facing the upper surface, and two pins 18 of the same length are inserted into the through-holes 9f so as to be in contact with the upper surface of the press ring 17.

Above the upper end surface 9a, an annular member 19 surrounding the pipe body 1 is supported obliquely upward by the upper ends of two pins 18. The annular member 19 has an inclined lower end in a direction perpendicular to the radial direction connecting the two pins 18 pivoted to the upper end surface 9a by a screw 20, and is provided at an inclined upper end on the opposite side to the screw 20. A lower end small diameter portion 7a formed by bending the connecting rod 7 outward is loosely fitted into a hole 19a having a smaller diameter than the connecting rod 7,
The annular stepped portion allows the annular member 19 to be moved in the horizontal direction relative to the pivot portion of the screw 20 by operating the operating lever 6.

Next, the operation of the device will be explained.

When the hole 12b of the lower connecting member 12 faces the mouthpiece of the fire hydrant and the handles 3 are pressed toward the mouthpiece, the inwardly inclined surface 15a of the tip of the claw is pressed by the mouthpiece. The pressed claw 15 is
The standpipe is opened against the biasing force of the leaf spring 16, and after passing through the base, is engaged with the small diameter stepped portion of the base by the biasing force of the leaf spring 16, so that the standpipe is connected to the base of the fire hydrant. Therefore, by connecting a hose to the single mouth portion of the standpipe, it becomes ready for use.

Next, when removing the standpipe connected to the fire hydrant from the fire hydrant, pull the operating lever 6 toward the handle 3 with one hand holding the handles 3, 3, and the connecting rod 7 pivotally attached to the tip of the standpipe will be removed. is moved downward and presses the annular member 19 with the small diameter stepped portion at its lower end. The annular member 19 pressed by the connecting rod 7 rotates around the pivot portion of the screw 20 and applies a downward force to the pressing ring 17 via the pins 18 , 18 . In this case, since the pressing ring 17 that receives the downward force is fitted onto the outer periphery of the inner tube 9b of the upper connecting member 9, it descends while maintaining a horizontal state and engages with the portion of the inverted conical surface 17a. 4
The inverted conical surfaces 15b of the claws 15 are pressed. Therefore, each pawl 15 is opened to the position where the tip part retreats into the notch 14c against the biasing force of the leaf spring 16.
When you lift the fire hydrant by the claws 15,
The connection can be removed without any damage.

In addition, even if the connecting rod 7 is bent at a fire scene, each claw 15 will remain closed and will not remain open as in the case of the conventional system, so that Not only is it possible to connect the operating lever 1, but also by pushing down the annular member 19 by putting your weight on your foot or using a tool, the operating lever 1 can be connected.
6, the stand pipe can be easily removed from the mouthpiece of the fire hydrant without having to operate the claw detachment ring on the fire hydrant side by opening each claw 15 evenly.

Furthermore, even if the connecting rod 7 is cut, each pawl 15 remains closed, so that it can be attached to and detached from the fire hydrant without any trouble in the same way as in the case described above.

Effects of the invention According to this invention, by pulling the operating lever toward the handle side, the connecting rod pivotally attached to the tip of the lever is pushed down, and the upper The pressing ring, which is fitted onto the outer periphery of the inner pipe of the connecting member and slid downward in a horizontal state, allows each pawl that engages with the inverted conical surface on the outer periphery to open equally, making it possible to open the stand pipe evenly. The mouth part of the fire hydrant will not be damaged during attachment/detachment. In addition, each claw is opened by pressing down on the connecting rod, so even if the connecting rod is bent, twisted, or cut, each claw will remain closed, so even in these cases, the stand The pipe can be attached to and detached from the fire hydrant.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of this invention, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is an enlarged sectional view of the main part of FIG. 2. DESCRIPTION OF SYMBOLS 1...Pipe body, 3...Handle, 6...Operation lever, 7...Connection rod, 9...Upper connection member, 9a
...Top end surface, 9b...Inner tube, 9d...Annular groove, 9
e...Outer tube, 10...Packing, 11...Male thread, 12...Lower connecting member, 12a...Lower end surface,
12b...hole, 14...annular claw seat, 14a...flange portion, 14b...rise pipe, 14c...notch, 15...L-shaped claw, 15b...inverted conical surface, 1
6... Leaf spring, 17... Pressing ring, 17a... Inverted conical surface, 18... Pin, 19... Annular member.

Claims (1)

[Scope of utility model registration request] An upper connecting member in which an outer pipe with a male thread and an inner pipe with a gasket attached to an annular groove on the inner surface are integrated at the upper end surface, and a single or double mouth whose lower end is fixed to the inner pipe of this member. a lower connecting member which is screwed onto the outer pipe of the member and has a hole approximately the same diameter as the inner pipe on its lower end face, and a flange portion is placed within the end face of this member and an inner riser pipe. An annular claw seat has a set number of notches formed on its upper surface, and a leaf spring that presses the inner surface of the lower or upper connecting member is fixed to the back surface of the claw seat whose tips protrude inward from each of the notches. a pressing ring having an inverted conical surface that is fitted onto the outer periphery of the inner tube of the upper connecting member and engages with an inverted conical surface formed on the inner surface of the rising portion of the upper connecting member; An annular member which is pivotally attached to the end face and supported diagonally upward at both sides of the central angle of 90 degrees from the pivot point by two pins that abut the upper face of the pressing ring through the end face; A standpipe for a fire hydrant, comprising a connecting rod that connects an inclined upper end and a tip of an operating lever whose middle part is pivotally attached to handles projecting from the top of the pipe body on both sides.