JPH0577918B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is an attachment/detachment device for a container such as a gas cylinder that is attached to a gas appliance and that continuously spouts out a filling material, and also has a safety mechanism.

(Prior art) For example, in the case of a gas appliance with a built-in gas cylinder, the gas cylinder can be attached or detached by pressurizing the rear end by operating an attachment/detachment lever on the front of the appliance (No. 57-52479). etc).

(Technical Issue) However, this requires a long communication member that extends to the rear end of the cylinder, a mechanism that converts the rotation of the lever into back and forth movement of the communication member, and the like. In addition, a large space is required to incorporate it, and when changing the form of the device, it is very troublesome to change the design. On the other hand, if gas appliances are used in an abnormal manner and the gas cylinder becomes overheated, it is extremely dangerous and may cause an explosion. However, no effective measures have been proposed regarding this point.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to miniaturize the attachment/detachment device, and at the same time provide a safety mechanism to the device itself, so that it can be easily formed with a very small number of parts, and yet ensure reliable attachment/detachment operation. An object of the present invention is to provide a container attaching/detaching device with a safety mechanism that provides safe operation.

(Technical means) The purpose is to provide a container storage section provided in the main body,
A device for removably setting a container, which includes an engaging piece that is fixed to a storage part and has an engaging part that can be engaged and detached from the rear end of the container, and a movable end of the engaging piece that can be externally operated. A disengagement member is formed of an exposed operating port and a shape memory material and is provided near the engagement portion of the engagement piece so as to press the rear end of the container to release the engagement when the ambient temperature exceeds a set value. This is achieved by a configuration consisting of a piece.

(Embodiment) To explain with reference to the drawings, the embodiment relates to a gas appliance A with a built-in gas cylinder, in which a main body 1 has a container B, that is, a housing part 2 for a gas cylinder, which is disposed in contact with one side of the main body 1. A governor 3 connecting the tip of the container B is disposed at one end of the storage section 2, and a device according to the present invention is provided at the other end. When the container B is set in the accommodating part 2, the nozzle n at the tip of the container is pushed in, and the pushing force exerted by the restoring spring or the like acts in the direction of the rear end b. In order to receive and support this, an engaging piece 5 having an engaging part 4 that can be engaged with and detached from the rear end b of the container is attached to the rear part of the accommodating part 2. The engaging portion 4 is formed at a substantially right angle, and has a window hole 6 formed in its central portion. Reference numeral 7 denotes an actuating portion of a detachment piece 8 that moves toward the cylinder through the window hole 6, and is made of a shape memory material, and the detachment piece 8 is attached to a base portion 9 behind the engaging portion with a stopper 10. Reference numeral 11 indicates an engagement piece mounting portion in the form of a groove extending in the axial direction of the container.

The engagement piece 5 shown in FIG. 2 has an elongated strip shape in the axial direction of the container, and is fixed at the base end by a stopper 12, which can be made of a metal material having spring properties. . The rear end portion of the engagement piece 6 projects upward, and the movable end 13 at the rear end is arranged in an operation port 14 formed in the main body 1.

FIG. 4 shows a modified example in which the base of the engaging piece 5 is pivotally supported on the main body 1 by a support shaft 15 and elasticity is imparted by a torsion spring 16, and FIG. This is an example in which the base is similarly supported 17 and given elasticity by a coil spring 18, and each example has an angular engagement part 4 similar to the above-mentioned example, and is formed at the front and rear of the same. window hole 6
A detachable piece 8 is provided on the lower side of the main body and has an actuating part 7 that moves within the container and pushes up the rear end b of the container. In the above, when the ambient temperature exceeds the set value, the shape memory material that is the material of the breakaway piece 8 expands from the arc shape and pushes up the rear end of the cylinder, and when the ambient temperature falls below the set value such as room temperature, it returns to the original shape shown in the figure. A so-called reciprocating type is used, which restores to the original state. Therefore, it is easy to reset the gas cylinder B once removed.

In each figure, 20 is a guide in the container axial direction provided on the governor 3, and 21 is a container regulating pin also provided on the governor 3, which is linked with the instrument stopper 22, and when the instrument stopper is opened, the flange f of the container B is used. It does not move back even if pushed and cannot be installed. Reference numeral 23 denotes a cover that covers the storage section 2 and rotates around a shaft 24 to open and close the storage section 2.

(Function) In the above configuration, the container B is placed in the storage section 2 of the main body 1.
To set it, the tip of the container B is pressed against the governor connection port, and the rear end b is pressed onto the engagement piece 5 from above. Pressed container rear end b
In the illustrated example, the setting is completed by engaging with the engaging portion 4.

Therefore, when the appliance plug of the gas appliance is operated, it is ignited, and no abnormal heat is applied to either the governor 3 or the gas cylinder B under normal usage conditions. Under this normal usage condition, the gas pressure will fluctuate slightly, but
The force is balanced within a range that does not exceed the force of engagement with the rear end b of the gas cylinder.

However, if the gas cylinder B is heated for some reason and its surrounding temperature rises abnormally beyond the set range, the detachable piece 8, which is in an arcuate state at room temperature,
The actuating part 7 deforms to push upward the rear end b of the gas cylinder B, which is the shape stored in advance.
Since the rear end b of the gas cylinder B is no longer supported, the gas cylinder B slides up onto the platform and is pushed back by the built-in spring of the valve nozzle n of the cylinder and the push spring of the container regulating pin 21, and the governor connection part also comes off.

As a result, the valve nozzle n of the gas cylinder is closed, so that gas is no longer discharged and combustion is also stopped, so that the gas cylinder B is no longer heated before reaching a dangerous state, and safety is ensured. On the other hand, when removing the gas cylinder B, by pushing down the movable end 13, the engagement with the rear end b of the cylinder is released as in the case of an abnormality, so that the gas cylinder B can be taken out. Furthermore, when the ambient temperature of the device reaches normal temperature, the detachable piece 8 returns to its original shape, so that resetting the cylinder is easy.

(Effects) Since the present invention is configured and operates as described above, when a container such as a gas cylinder is heated to a temperature that cannot occur in normal usage, the safety mechanism, that is, the lock that engages with the container, is activated. A breakaway piece made of a shape memory material provided on the joint operates and disengages, cutting off the gas supply and stopping combustion, making it safe as the container will not be dangerously overheated. In particular, in the present invention, a part of the engaging piece that removably sets the container also serves as a safety mechanism.
It has a small number of parts, can be configured very simply, and is easy to install and remove, making it highly practical.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of a gas appliance incorporating a container attaching/detaching device with a safety mechanism, FIG. 2 is a plan view of the vicinity of the engaging part, and FIG. Figures 4 and 5 are cross-sectional views of two modified examples. DESCRIPTION OF SYMBOLS 1... Main body, 2... Container storage part, 4... Engagement part, 5... Engagement piece, 7... Actuation part, 8... Separation piece.

Claims (1)

[Scope of Claims] 1. A device for removably setting a container in a container accommodating section provided in a main body, which includes an engaging section fixed to the accommodating section and capable of engaging and detaching from the rear end of the container. The movable end of the engagement piece is formed by an operation port that exposes the movable end of the engagement piece so that it can be operated externally, and a shape memory material. 1. A container attaching/detaching device with a safety mechanism, comprising a detachable piece provided near an engaging part of an engaging piece so as to be detachable. 2. The safety device according to claim 1, wherein a window is formed in the engagement portion of the engagement piece, and a part of the detachment piece moves within the window in the event of an abnormality to press the rear end of the container. Container attaching/detaching device with mechanism. 3. The safety mechanism according to claim 1, wherein the detachable piece is made of a reciprocating shape memory material that deforms into a predetermined shape when the ambient temperature exceeds a set value and returns to its original shape when the ambient temperature returns to normal. Container attaching/detaching device.