JP2002282374A - Fire extinguisher and its bulb body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire extinguisher with a bulb body whose simple structure secures its airtightness. SOLUTION: The bulb body 4 of this fire extinguisher consists of an installation site 5 of a hose 7 whose end is connected to be fixed through the first fixation member 6, an installation site 8 for a siphon tube 10 whose end is connected to be fixed through the second fixation member 9 and a tubal route 4a which passes between the hose installation site 5 and the siphon tube installation site 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguisher and a valve body thereof, and more particularly to a fire extinguisher capable of ensuring airtightness with a simple structure and a valve body thereof.

[0002]

2. Description of the Related Art As shown in FIG.
Is known. In FIG.
The fire extinguisher 100 is configured by attaching the valve body 101 to the mouth of the container body 102 that contains a fire extinguishing agent or the like.

[0003] A container body 102 is mounted on a valve body 101.
Is connected to a siphon tube 103, and a hose 104 is connected to the front side. An operating lever 105 with a safety device and the like are provided to allow the two to communicate with each other. On the other hand, for the valve body 101, casting such as casting or aluminum alloy die casting is frequently used, and the cost, productivity, corrosion resistance and the like are improved.

[0004]

However, since a cast member is likely to have a void therein, when machining is performed to mount a component, a capillary passage is formed between the processed portions via the void. . Pores due to casting do not appear near the surface, so it is not necessary to perform machining, but in the conventional technology, the part connection part for attaching parts
Machine processing such as screws was indispensable.

That is, as shown in an enlarged sectional view of the valve body 101 in FIG.
The parts such as 04 are screwed into the threaded parts 106 and 107, which are part connection parts of the valve body 101, and the ends 103a and 104
a is connected by screwing or the like. Further, the operating lever 105 is attached via the upper lever fixing hole 105a.

[0006] Screw parts 106 and 107, lever fixing hole 10
Since the component connecting portions such as 5a are formed by machining, they are mutually connected by a capillary passage formed through the internal cavity A, and airtightness with the outside cannot be ensured.

Therefore, the valve body 101 formed by casting is limited in its application only to those that do not require high airtightness, such as a pressurized fire extinguisher using carbon dioxide or the like. , Which is constantly pressurized), could not be adopted because there is a concern about pressure leakage caused by voids generated during casting.

[0008] Therefore, in the case of the pressure accumulating type fire extinguisher, there has been no other choice but to use a costly forging process or machining from a raw material which requires many man-hours.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a fire extinguisher that can ensure airtightness with a simple configuration and a valve body thereof.

[0010]

Therefore, in the valve body of the fire extinguisher according to the present invention (claim 1), an end of a hose for injecting a fire extinguishing agent is connected and fixed via a first locking member. A hose connection opening serving as a component connection portion, and a siphon tube attachment opening serving as a component connection portion to which an end of a siphon pipe for guiding a fire extinguishing agent from the container body is connected and fixed via a second locking member; It is characterized by having a pipeline communicating between the hose mounting port and the siphon pipe mounting port.

A hose and a siphon pipe are connected to the hose mounting port and the siphon pipe mounting port via locking members, respectively, thereby facilitating assembly to the valve body. When the hose or the like is connected and fixed, the valve body functions as a relay between the hose and the siphon pipe.

Further, since the hose mounting port and the siphon pipe mounting port, which are the parts connecting parts, do not require a high degree of processing accuracy, the hose mounting port and the siphon pipe mounting port are not
It is possible to apply a low-cost casting with the casting surface as it is, without requiring machining. In terms of processing and assembly, the time required for production is reduced.

In the case where casting is applied, since machining of the component connecting portion is not required, the casting cavity inside the component connecting portion remains sealed without being opened on the surface of the component connecting portion. As a result, pressure leakage due to the capillary passage formed through the cavity is avoided, and the valve body that relays between the hose and the siphon tube easily assures airtightness as a whole.

[0014] In the valve body of the fire extinguisher according to the present invention (claim 2), at least one of the first locking member and the second locking member is connected to an end of the hose and the siphon tube. A first fastener mounting portion, which is a component connecting portion that is configured by a stopper that can be engaged with the engaging portion, and is a component connection portion that mounts and holds the stopper so that the stopper is engaged with the engaging portion. 2 is characterized in that a stopper mounting portion is formed at the hose mounting port and the siphon pipe mounting port corresponding to the stopper.

[0015] The stopper as a locking member is held by the stopper mounting portion of the hose mounting port and the siphon pipe mounting port. Corresponding hoses and siphon tubes are connected and fixed via the stoppers held by the stopper mounting portions.

[0016] Therefore, the connection parts such as the hose mounting port can be connected securely to the connection parts such as the hose without requiring the dimensional accuracy thereof. Secured.

Further, in the valve body of the fire extinguisher according to the present invention (claim 3), the stopper is formed in a clip shape which can be elastically engaged with the engaging portion, and the stopper is located on the side of the corresponding mounting opening. The fastener mounting portion is formed so as to be mounted and held from one side.

Since the stopper mounting portion is formed so as to mount a clip-shaped stopper from the side of the mounting opening, the stopper having a simple structure does not require the dimensional accuracy of the component connection portion. The hose and siphon tube are securely connected to the valve body corresponding to the stoppers.

Further, in the valve body of the fire extinguisher according to the present invention (claim 4), the stopper mounting portion has a recess having a depth in which the stopper mounted on the stopper mounting portion is embedded. It is characterized by being formed as a part.

Since the stopper mounting portion has a recess having a predetermined depth, the stopper is mounted and held so as to be embedded in the recess. Therefore, when connecting the hose or the like, the stopper does not come off easily, and it is possible to prevent accidents such as mischief.

Further, the valve body of the fire extinguisher according to the present invention (claim 5) is characterized in that the entire body including the component connection part is formed by casting.

The entire valve body including parts connecting parts such as a hose mounting port and a siphon pipe mounting port is integrally formed by casting, and by using this valve body as it is, all casting voids are sealed inside. Since the communication by the capillary passage is suppressed, the airtightness of the valve body is ensured.

Furthermore, the fire extinguisher of the present invention (claim 6)
The valve body, the first locking member, a hose attached to the hose mounting port via the first locking member, the second locking member, and the second locking A siphon tube attached to the siphon tube attachment opening via a member.

Since a hose and a siphon tube are attached to the mounting opening of the valve body via a locking member, the fire extinguisher can be applied to a valve body that does not require a high degree of processing accuracy and can simplify the assembling method. Can be planned.

In addition, since airtightness can be easily secured by using a valve body that is as cast, which can be easily formed, a pressure-accumulating fire extinguisher that needs to maintain pressure for a long period of time can also be formed by casting. A valve body can be applied.

[0026]

Embodiments of the present invention will be described below. FIG. 1 is an exploded sectional view of a valve section of a fire extinguisher according to an embodiment of the present invention.

In FIG. 1, a fire extinguisher 1 is constructed by attaching a valve body 4 to a mouth of a container body 2 with a holding nut 2a. A hose 7 is connected to the front surface of the valve body 4, and a siphon tube 10 is connected to the inside of the container body 2. In addition, the valve body 4 is provided with an operating lever 3 with a safety device 3a for discharging the fire extinguishing agent.

The container body 2 accommodates a fire extinguishing agent (not shown) and a siphon tube 10 for guiding the extinguishing agent.
Is connected to the valve body 4 and inserted into the container body 2. Further, air or nitrogen as a pressure source is pressurized and sealed in the container body 2.

A hose connection port 5 and a siphon pipe connection port 8 are formed in the valve body 4 as parts connecting parts for connecting the hose 7 and the siphon pipe 10.
The hose mounting port 5 and the siphon pipe mounting port 8 have:
A stopper mounting portion 5a for mounting and holding the stoppers 6, 9;
8a are formed.

The stopper mounting portion 5a of the hose mounting port 5 is
In order to insert the stopper 6 into the hose attachment port 5 from a direction perpendicular to the axis thereof, the hose attachment port 5 is formed in two through holes toward the front and back of the paper surface of FIG.

Stopper mounting portion 8 of siphon tube mounting opening 8
a is a groove formed on the front side and one on the rear side of FIG. 1 in order to insert the stopper 9 into the siphon tube mounting opening 8 at right angles to the axis thereof. Is formed.

The stopper mounting portion 5a of the hose mounting port 5 has a stopper 6 mounted on the stopper mounting portion 5a in order to prevent an unexpected situation due to inadvertent jumping out or mischief.
5 having such a depth as to sink without being exposed to the outside
b is formed. All of the parts connecting portions such as the hose mounting port 5 and the siphon pipe mounting port 8 are formed collectively by casting molding of aluminum die casting or the like.

The stoppers 6, 9 are locking members for connecting and fixing the hose 7 and the siphon tube 10. Hose 7,
At the end of the siphon tube 10, groove-shaped engaging portions 7a and 10a for engaging with the stoppers 6 and 9 are formed around the periphery.

The stopper 6 has two arms 6a and 6a, and is formed in a substantially U-shaped clip shape by using an elastic wire material which is bent so as to be narrowed in the vicinity thereof while expanding its tip. When the stopper 6 is mounted on the stopper mounting portion 5a, the two arms 6a, 6a protrude into the mounting opening 5.

The engaging portion 7a of the hose 7 has two arms 6a, 6
From the expanded end side of a, it is received so as to be held in the pocket by its elastic deformation. As a result, the stopper 6 is elastically engaged and fixed to the end of the hose 7 with the end of the hose 7 sandwiched in the pocket. The same applies to the stopper 9 of the siphon tube 10.

Next, attachment of components will be described. When mounting the parts such as the hose 7, the hose 7 and the siphon pipe 10 are inserted into the valve body 4 into the hose mounting port 5 and the siphon pipe mounting port 8, respectively. Attach the stoppers 6, 9 in a direction perpendicular to the axes of 5, 8.

The hose 7 and the siphon pipe 10 are fixed to the hose mounting port 5 and the siphon pipe mounting port 8 by stoppers 6 and 9 engaged with the respective engaging portions 7a and 10a. In this case, the stopper 6 of the hose 7 is mounted in such a manner as to be embedded in the recess 5b formed in the stopper mounting portion 5a so as not to be easily removed, thereby preventing an accidental situation such as mischief.

Next, a fire extinguisher 1 according to an embodiment of the present invention.
The operation of the valve body 4 will be described. FIG. 2 shows an enlarged sectional view of the valve body 4 of the fire extinguisher 1.

In FIG. 2, the valve body 4 is provided with parts connecting parts such as a lever fixing hole 3b, a pipe line 4a, a container connecting part 4b, a hose mounting port 5 and a siphon pipe mounting port 8 without machining. It is formed integrally by molding. The parts connecting parts such as the hose mounting port 5 are used as they are by casting, and the parts are mounted respectively.

The hose 7 and the siphon pipe 10 are connected to the hose mounting port 5 and the siphon pipe mounting port 8, which are parts connecting parts, by engaging members with clip-shaped stoppers 6, 9.
Is attached. Since the condition required for each connection is sufficient if the supply of the fire extinguishing agent is ensured, the condition can be satisfied by the dimensional accuracy of the casting without requiring a high degree of dimensional accuracy by machining.

As for the locking member, it is sufficient if the hose 7 and the siphon tube 10 can be fixed to the mounting ports 5 and 8, respectively. Therefore, the above-mentioned stoppers 6 and 9 are provided with the stopper mounting portions 5a and 8a. A single pin-shaped member that is held at Hose 7, engaging portion 7 of siphon tube 10
It is sufficient that a and 10a are steps-shaped stoppers that can be engaged with the pin-shaped member.

In addition, the locking member can take various forms. For example, a wedge-shaped member or a ring-shaped member which can be expanded in diameter, which is provided in the fitting gap between the end of the hose 7, the end of the siphon tube 10 and the mounting ports 5 and 8, and a retaining cam. The locking member can be constituted by a stopper such as a shaped member.

As described above, the hose connection port 5 and the siphon pipe mounting port 8 can be integrally formed with the valve body 4 without using any mechanical processing by using the connection method using the locking members such as the stoppers 6 and 9. It can be formed by casting.

The casting has a characteristic that, even if a void is formed inside, the void does not appear near the surface. Therefore, even if the opening A is formed inside the valve body 4, the machining opening is avoided by avoiding machining, so that the opening A remains sealed without opening to the surface. Communication with each other is avoided, and airtightness with the outside is ensured.

Due to this airtightness, when the fire extinguisher 1 is constructed by attaching the valve body 4 to the mouth of the container body 2, the sealing pressure in the container body 2 is maintained for a long time. Therefore, the valve body 4 having a simple configuration by casting can be adopted for the pressure accumulating fire extinguisher.

Fire extinguisher 1 provided with valve body 4 of the present invention
When the safety device 3a is released and the operating lever 3 is gripped and operated, including the pressure accumulating fire extinguisher in which air or nitrogen is sealed in the container body 2, the hose 7 and the siphon tube 10 are communicated, The fire extinguishing agent is released through the hose 7 by the internal pressure of the container body 2.

As described above, the present invention employs the connection method of attaching the parts via the locking members such as the clip-shaped stoppers 6 and 9, so that the prior art was indispensable for attaching the parts. Machine work such as screws is not required. For this reason, the valve body 4 with high airtightness can be obtained by simple casting.

The connection method between the valve body 4 and other parts such as the hose 7 and the siphon tube 10 does not use screws or caulking, but uses locking members such as fasteners 6 and 9. This enables cost reduction.

In addition, the time required for production is reduced by reducing the number of assembly steps and the like. Furthermore, by casting a low-cost aluminum die-cast or the like, not only the valve portion but also the total cost of the product can be significantly reduced.

Further, the present invention can be applied to an accumulator type fire extinguisher that is expected to contribute to environmental protection by using air or nitrogen as a pressure source. It has the potential to replace pressure fire extinguishers, and there is great hope for market expansion.

[0051]

As described above, the present invention employs a connection method for mounting a component via a locking member such as a clip-like stopper, and is indispensable for mounting a component in the prior art. Machine processing such as threaded screws becomes unnecessary, and a highly airtight valve body can be obtained by simple casting.

Therefore, according to the present invention, it is possible to reduce the manufacturing cost of the valve body of the fire extinguisher including the accumulator type and the cost of the connection between the parts, and to reduce the number of assembling steps of the valve portion of the fire extinguisher. It becomes possible.

The present invention can contribute to environmental protection by being applied to an accumulator type fire extinguisher.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view of a valve section of a fire extinguisher according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing the operation of the valve body of the fire extinguisher of FIG. 1;

FIG. 3 is an exploded sectional view showing a valve section of a conventional fire extinguisher.

FIG. 4 is an enlarged sectional view showing a valve body of the fire extinguisher of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fire extinguisher 2 Container main body 4 Valve body 4a Pipe line 5 Hose mounting port (Part connection part) 5a, 8a Stopper mounting part (Part connection part) 5b Depression (Part connection part) 6, 9 Stopper (Locking member) 6a Arm 7 Hose 7a, 10a Engagement part 8 Siphon tube attachment port (component connection part) 10 Siphon tube

Claims (6)

[Claims] An end of a hose for injecting a fire extinguishing agent is connected to a hose via a first locking member, and a siphon for guiding the extinguishing agent from a container body. A siphon pipe attachment port which is a component connection part to which an end of the pipe is connected and fixed via a second locking member;
A valve body for a fire extinguisher, comprising: a pipe communicating between the hose mounting port and the siphon pipe mounting port. 2. The apparatus according to claim 2, wherein at least one of said first locking member and said second locking member is constituted by a stopper which is engageable with an engagement portion at an end of said hose and said siphon tube. The first fastener mounting portion and the second fastener mounting portion, which are component connection portions for mounting and holding the stopper so that the stopper is engaged with the engagement portion, include the hose attachment port and the siphon tube. 2. The valve body for a fire extinguisher according to claim 1, wherein the mounting opening is formed corresponding to the stopper. 3. The stopper mounting portion is formed so that the stopper is resiliently engaged with the engaging portion, and the stopper is mounted and held from a side of a corresponding mounting opening. The valve body for a fire extinguisher according to claim 2, wherein the valve body is provided. 4. The component mounting portion according to claim 3, wherein a recess having a depth in which the fastener mounted on the fastener mounting portion is embedded is formed in the fastener mounting portion. Fire extinguisher valve body. 5. The valve body for a fire extinguisher according to claim 1, wherein the entirety including the component connection part is formed by casting. 6. The fire extinguisher valve body according to claim 1, the first locking member, and the first locking member.
A hose attached to the hose mounting port via the locking member, a second locking member, and a siphon pipe mounted to the siphon pipe mounting port via the second locking member. A fire extinguisher characterized by comprising: