JPS6227319B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. FIELD OF THE INVENTION The present invention relates to a securing device for securing a pressurized fluid removal device to a pressurized fluid cartridge. More particularly, the invention relates to a fixing device for fixing a gas extraction device to an aerosol cartridge containing a flammable liquefied gas, such as butane.

B. Prior Art As a fixing device of this type, one in which a clip having a V-shaped bent portion at the lower end is fitted into a cylindrical clip knob is known. This device is configured to apply a V-shaped bent portion to the lower insertion portion of the valve of the cartridge, and to push the V-shaped bent portion inwardly with the lower end of the clip knob to tighten the lower valve insertion portion of the cartridge. There is. The details of its construction are described in Utility Model Publication No. 12966, 1973.

Portable welding of cartridge and ejector,
When used as lighting and heating appliances, this type of fixing device is required to satisfy two seemingly contradictory conditions. First, the cartridge and extraction device must be firmly integrated. This is because if the connection becomes loose, the extraction device may tilt and flammable gas may leak. However, this bond must not be too strong. If the cartridge and ejector are dropped and subjected to impact while integrated, the cartridge and ejector must be separated to prevent damage to the cartridge itself. Generally, a cartridge is constructed by joining a dome-shaped part and a cup-shaped part, and if this joint is damaged, flammable gas will violently spew out, which is dangerous.

Therefore, this type of fixing device needs to suitably satisfy the above two conditions, but the conventionally known fixing devices are suitable in terms of the second condition, but do not satisfy the first condition.
It is not appropriate in terms of the conditions.

This is because the surface area and volume of the inlet part of the cartridge below the valve are small, so a sufficient tightening effect cannot be expected, and it is difficult to adjust the clearance between the clip and the clip knob, so there is no possibility of loosening or This is because the occurrence of such events is unavoidable.

C. SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple and reliable fixation device that overcomes these drawbacks of conventional fixation devices.

The fixing device of the present invention is a device for fixing a pressurized fluid extraction device to a pressurized fluid cartridge having a valve and an annular rim surrounding the valve at a distance, the device comprising: (a) the extraction device; a central piece integral with said cartridge having pressurized fluid extraction means for opening and fluid-tightly coupling thereto, and having an externally threaded central piece; (b) surrounding said central piece; an annular piece having on its periphery a plurality of engaging pieces having opposing locking parts and abutting parts at free ends that are movable radially inward and outward; (c) the central part; (d) means for pressing the abutting portion in the axial direction to move the locking portion radially inward and outward; It consists of

The apparatus of the present invention is characterized in that the extraction device is firmly fixed to the cartridge having the annular rim forming an inlet, and further includes: The locking portion is positioned on the outside in the radial direction of the free end of the joining piece, and the abutment portion is positioned on the inside in the radial direction, and the shape of the locking portion is fitted into the annular ring rim entry portion and can be locked. (b) the annular piece B is provided with a threaded portion that cooperates with the thread on the outer surface of the center piece A, and this serves as the displacement means C; and (c) the lower end of the annular piece A is The present invention is characterized in that the above-mentioned pressing movement means (d) is made into the above-mentioned pressing movement means (d).

D Description of Embodiments Embodiments of the fixing device of the present invention will be described in detail below with reference to the accompanying drawings.

The cartridge 1 has a cylindrical body 1a with a protruding upper dome 1b. Cup-shaped body 1
c is fixed to the dome 1b and together with the dome 1b forms an annular rim 1d having an inset. The take-out valve 1e is arranged at the center of the cup-shaped body 1c.

The ejection device 2 comprises an externally threaded central piece 4 around which a known ejection device 5 is adapted to cooperate with the valve 1e of the cartridge 1. Center piece 4
is provided at its lower part with a bearing surface 4a having a diameter smaller than the diameter of the thread root of its threaded part.
The support surface 4a ends in a chamfer 4b. It is clear that the bearing surface 4a thus reduces the threaded length of the central piece 4.

The main part of the fixation device of the invention is the annular piece 3, which is a single piece molded from a suitable plastic material. The annular piece 3 consists of a cylindrical nut 6 with a downwardly extending sleeve 7. In sleeve 7,
Four radial slits 8 are formed so as to constitute four mutually independent elastic jaws 9 connected to the nut 6. The sleeve 7 is provided with a conical hole 10 that opens upward and connects to the internally threaded portion of the nut 6. Hole 10 is
A second trapezoidal hole 11 with a larger slope extends downward. Each jaw piece 9 thus has a pressure portion 12 formed in the form of an inwardly inclined surface of revolution. The outer circumferential surface of the sleeve 7 and therefore each jaw piece 9 has a flange or collar 1.
A protrusion 13 forming a hook portion with 4 provided above.
It is equipped with The nut 6 is provided with two ribs 6a and 6b to facilitate its operation.

The annular piece 3 is partially or non-partially screwed into the thread of the central piece 4, so that the projection 13 is elastically fitted into the recess of the rim 1d of the cartridge 1. When the annular piece 3 is immobilized in the angular direction by each rib 6a, 6b and the center piece 4 is screwed into the annular piece 3, the chamfered part 4b of the center piece 4 hits the conical trapezoidal hole 11 at the end of this screwing. Become. In this case, as shown in FIG. 3, each jaw piece 9 acts centrifugally, so that the protrusion 13 of each jaw piece 9 is sealed within the recess of the rim 1d of the cartridge 1.

By adjusting the elasticity of the elastic jaw piece 9,
The strength of the connection between the cartridge 1 and the extraction device 2 can be changed. Furthermore, since the annular piece 3 itself is a single item, it is easy to replace.

When the center piece 4 is removed from the annular piece 3, the brim 1
4 is released from the sealing pressure and can easily elastically release the fixing device from the cartridge 1. For this reason as well, the plastic material forming the annular piece 3 must be selected to have appropriate rigidity and elasticity. For example, polypropylene is a suitable material.

E. Effects of the Invention As described above, the present invention provides a fixing device that can provide a sufficient tightening effect, does not require clearance adjustment, can be provided as a single molded product, has a simple structure, and is inexpensive to manufacture. A device is obtained.

[Brief explanation of the drawing]

1 is an axial sectional view of a part of the gas extraction device, a part including the valve of the pressurized gas cartridge, and an embodiment of the fixing device of the present invention; FIG. 2 shows the fixing device of FIG. 1 in the working position; The axial sectional view shown in FIG. 3 is a plan view of the annular piece of the fixation device of FIG. 1...Cartridge, 1d...Annular ring rim, 1e
... Valve, 2 ... Removal device, 3 ... Annular piece, 4 ...
...Central piece, 4b... Chamfered part, 6... Nut,
13... Protrusion.

Claims (1)

[Scope of Claims] 1. A device for fixing a pressurized fluid extraction device 2 to a pressurized fluid cartridge 1 having a valve 1e and an annular rim 1d surrounding the valve at a distance, ) a central piece 4 integral with said extraction device and having pressurized fluid extraction means 5 for opening and fluid-tightly coupling with said cartridge valve and threaded on its outer surface; An annular shape surrounding the center piece 4 and having on its periphery a plurality of engaging pieces 9 having opposing locking parts 13 and abutting parts 12 at their free ends, movable radially inwardly and outwardly. (c) means 6 for axially displacing the center piece into the annular piece; and (d) axially pressing the abutting part to radially radially move the locking part. means 4b for moving the annular piece inwardly and outwardly so as to secure the extraction device to the cartridge having the annular rim forming an inset; (b) Positioning the locking portion on the radially outer side of the free end of the engaging portion and positioning the abutting portion on the radially inner side, and fitting the shape of the locking portion into the annular ring rim insertion portion. (b) the annular part A is provided with a threaded part 6 that cooperates with the thread on the outer surface of the center part A, and this serves as the displacement means C; and (c) the center The fixing device is characterized in that the lower end portion 4b of the piece A is the pressing moving means D. 2. An elastic jaw piece 9 with a protrusion 13 located on the radially outer side of the free end as a locking part and a slope 11 located on the radially inner side of the free end as an abutment part as an engaging part. The device according to item 1 above, comprising: 3. The engaging piece is provided with a locking part that comes into contact with the top of the annular rim when the locking part is fitted into the annular rim insertion part;
The device according to item 1 above, comprising a collar 14.