JPH0249460Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a portable gas burner that allows a fuel gas container and a fuel gas injector to be connected safely and reliably over a long period of time.

(Prior art and its problems) As shown in Fig. 4, a portable gas burner includes a fuel gas container 1 made of a steel plate with a plurality of anti-rotation grooves on the shoulder, and a female thread screwing a fuel gas injector onto the top. an iron plate outer mantle 4 for receiving the fuel gas container, which is provided with a protrusion that engages with the groove on the inner surface of the shoulder part, is enlarged in diameter at the bottom, and has at least three protrusions provided in the enlarged diameter part; A portable gas burner is commercially available, which includes a back cover 20 made of an iron plate that engages in a bayonet-like manner with the protrusion of the enlarged diameter part of the mantle, and a fuel gas injector 14 that is screwed into the female thread.

This portable gas burner has a fuel gas injector (hereinafter referred to as the injector), a jacket and a back cover that are used repeatedly, and only the fuel gas container is replaced when the gas runs out. Here, the connection between the fuel gas container and the injector is such that when the injector is screwed onto the top male thread of the mantle, the aperture at the tip of the injector makes a hole in the top of the fuel gas container, and the packing fits into the packing seat of the fuel gas container. They fit together airtightly.

In order to ensure the above-mentioned airtight connection, the axis of the fuel gas injector and the axis of the fuel gas container housed in the mantle must match, and there is no possibility that the axes of the two may be misaligned or intersect. If this happens, the injector packing will not airtightly fit into the packing seat at the top of the fuel gas container.

Looking at the actual usage conditions of this portable gas burner,
When the burner is taken out and placed in the designated place after use, it is handled quite roughly, sometimes hitting the corners of objects, which causes the enlarged diameter part of the jacket and the back cover to become distorted. There is. If the enlarged diameter part or the back cover is distorted in this way, the airtight connection between the fuel gas container and the injector will be insufficient, causing problems such as fuel gas leaking from the insufficient joint and causing burns to workers. Ta.

(Purpose of the invention) In view of the above points, the present invention was developed to prevent the joint between the fuel gas container and the injector, which occurs due to distortion of each part during repeated use of the fuel gas injector, jacket, and back cover of a portable gas burner. The object of the present invention is to provide a portable gas burner that can be used safely and reliably for a long period of time without causing any defects.

(Means for achieving the object of the invention) In order to achieve the above object, the present invention provides a fuel gas container with a plurality of anti-rotation grooves on the shoulder, a female screw on the top for screwing the injector, The inner surface of the part is provided with a protrusion that engages with the recessed groove, the outer mantle receives the fuel gas container whose diameter has been expanded at the bottom, and the annular mantle that covers the enlarged diameter part and its shoulder and has at least one air vent hole. It consists of a male screw, an annular cap nut that is screwed into the annular male screw, and an injector that is screwed into a female screw carved into the top of the mantle.

(Example) Next, an example of the present invention will be described with reference to the drawings. 1
1 is a fuel gas container, and its shoulder portion is provided with a groove 2 for proper positioning and rotation prevention when inserted into a mantle 4, which will be described later. 3 is a joint edge between the end plate and the peripheral tube.

Reference numeral 4 denotes a jacket for receiving a fuel gas container, and a female screw 5 for screwing an injector is fixed to the top of the jacket by caulking. Numeral 6 is a plate spring for stabilizing the fuel gas container 1, and is fixed at the same time when the female screw 5 is caulked. Reference numeral 7 denotes a protrusion that engages with a groove 2 provided in the shoulder portion of the fuel gas container 1.

8 is an MC that covers the enlarged diameter part of the mantle 4 and its shoulder part.
It is an annular male thread made of nylon, and its shape follows the shape of the mantle 4. This annular external thread 8 has at least one air vent hole 10 bored in the threaded part 9 .

Reference numeral 11 denotes an annular cap nut made of MC nylon that is screwed onto the annular male thread 8, and is composed of a flange portion 12 and a female thread portion 13.

Reference numeral 14 denotes an injector, which has a piston portion 15 with an internal cone (not shown) and a packing seat 16 at its tip.
It consists of a packing 17 fitted in the gas injection amount adjustment knob 18 and a nozzle 19.

(Assembly) To assemble the portable gas burner of the present invention as described above, remove the injector 14 from the female thread 5 at the top of the mantle 4. Next, loosen and remove the annular cap nut 11.

The fuel gas container 1 that has run out of gas is taken out, and a new fuel gas container 1 is inserted into the jacket 4. At this time, the groove 2 and the protrusion 7 of the mantle 4 are brought into engagement.

Next, the annular cap nut 11 is screwed onto the threaded portion 9 of the annular male screw 8, and the fuel gas container 1 is pushed up by the flange portion 12 of the annular cap nut 11 and fixed between the leaf spring 6 and the flange portion 12.

When the fuel gas container 1 is fixed inside the mantle 4, the mantle 4
The injector 14 is screwed and fixed to the top female thread 5 of the.
During this screwing and fixing process, the packing 17 fitted into the packing seat 16 comes into contact with the top packing seat of the fuel gas container 1. Thereafter, when the screw is further screwed in, the piston portion 15 is retracted and the cone housed inside advances, a hole is made in the top of the fuel gas container 1, and gas is delivered to the injector 14, completing the assembly.

(Effects) In the portable gas burner constructed as described above, the lower part of the mantle, that is, the enlarged diameter part and the bottom part, are protected by the annular male screw and the annular cap nut, and the fuel gas container is pushed up by the flange of the annular cap nut. Therefore, the fixed state is extremely stable.

Therefore, the jacket and back cover will not become distorted during long-term use, and the connection between the fuel gas container and the injector will not deteriorate, so there is no risk of ignition due to gas leakage, and work safety is ensured. can.

[Brief explanation of the drawing]

FIG. 1 shows a portable gas burner according to the present invention, where A is a vertical sectional view of the main body excluding the fuel gas injector;
B is a front view of the fuel gas injector, Figures 2 and 3.
The figure is a perspective view of the main part of FIG. 1, and FIG. 4 is an explanatory perspective view of the conventional example, and the reference numerals in the figure are as follows. 1...Fuel gas container, 2...Concave groove, 3...Joining edge between head plate and peripheral tube, 4...Outer jacket, 5...Female thread,
6... Leaf spring, 7... Embossed protrusion, 8... Annular male thread, 9... Threaded portion, 10... Air vent hole, 11
...Annular cap nut, 12...Flange part, 13
... Female thread part, 14 ... Injector, 15 ... Piston part, 16 ... Packing seat, 17 ... Packing, 18 ... Gas injector adjustment knob, 19 ...
...Nozzle, 20...Back cover.

Claims (1)

[Scope of utility model registration request] The fuel gas container has a plurality of anti-rotation grooves on the shoulder, the top has a female thread for screwing the fuel gas injector, and the inner surface of the shoulder has a protrusion that engages with the grooves, and the diameter increases at the bottom. a mantle for receiving the fuel gas container, an annular male screw that covers the enlarged diameter portion and the shoulder thereof and has at least one air vent hole, an annular cap nut that is screwed onto the annular male screw, and a mantle that is engraved on the top of the mantle. A portable gas burner characterized by comprising a fuel gas injector that is screwed into a female screw provided therein.