JP3247608B2 - Device for preventing incorrect mounting of gas cylinders - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing erroneous mounting of a gas appliance using a cassette type gas cylinder filled with liquefied gas as fuel.

[0002]

2. Description of the Related Art In a gas cylinder filled with a liquefied gas, a pipe communicating with a stem of a gas outlet portion is always opened in a space above a liquid level inside the container in order to supply gaseous gas inside the container. Thus, it is necessary to regulate the posture so that the upper part in the set state is at a fixed position. For this purpose, a notch-shaped guide recess is provided in a part of the flange at the head of the gas cylinder, while a guide projection is provided on the gas appliance to engage with the guide recess. Specifies the mounting posture.

[0003] Further, the gas cylinder is mounted by placing the above-mentioned guide concave portion upward with the gas cylinder lying in a predetermined position of the gas appliance so as to coincide with the guide convex portion.
Thereafter, when the set lever is operated, a set member (push plate) abutting on the rear end of the gas cylinder pulls the gas cylinder forward to engage the guide concave portion and the guide convex portion, and the gas cylinder is connected to the cylinder connection port of the governor device. The stem of the gas outlet is immersed so that the shut-off valve in the gas cylinder is opened and set.

Various erroneous mounting prevention devices have been proposed for preventing the gas cylinder from being forcibly mounted in a state where the guide concave portion and the guide convex portion do not coincide with each other. For example, Japanese Unexamined Utility Model Publication No. 5-87403 discloses a device. An elastic member (leaf spring) is provided in a portion of the above-mentioned set member which comes into contact with the gas cylinder, and the set lever is forcibly operated in the setting direction in a state where the guide concave portion and the guide convex portion are not engaged. 2. Description of the Related Art There is known a technique in which the movement of a set member is absorbed to prevent deformation and breakage. In addition,
JP-A-136401 also proposes a structure in which a set member is connected in the middle of the set member by a coil spring so that the set member absorbs the deformation.

[0005]

However, the above-described apparatus for preventing incorrect mounting of a gas cylinder has a problem in that the set position of the gas cylinder is displaced when the guide recess of the gas cylinder does not coincide with the guide projection of the gas appliance. In order to prevent the set member from being deformed or damaged due to excessive operation of the set lever, it is not intended to notify the user of the incorrect mounting state, and that the user is not supplied with gas. Knows that the gas cylinder has not been set properly and tries to set it again. Further, since a spring is used in the middle of the set member, there is a problem in terms of usability.

Therefore, in view of this point, the present invention uses a simple mechanism to warn the user with sound using a simple mechanism that the guide concave portion of the gas cylinder and the guide convex portion of the gas appliance do not coincide with each other. An object of the present invention is to provide a device for preventing a gas appliance from being incorrectly mounted.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an apparatus for preventing incorrect mounting of a cylinder of a gas appliance according to the present invention is arranged such that a gas cylinder having a notch-shaped guide recess is engaged with the guide projection of the gas appliance. A first set member that moves according to the operation of the set lever for setting the gas cylinder by operating the set lever while restricting the posture.
The second that abuts on the gas cylinder and moves in response to the movement
A set member, and a warning mechanism that is activated when a difference in the amount of movement between the first set member and the second set member is greater than or equal to a predetermined value to generate a warning sound, the first set member, the second set member, It is characterized by being interposed between.

[0008] A specific cylinder mis-mounting prevention device includes a first set member that moves in accordance with a setting operation of a set lever, and a rear end portion slidably attached to the first set member and abutting against the bottom of the gas cylinder. A second set member, and a audible alarm mechanism interposed between the first set member and the second set member. The audible alarm mechanism is a sleeve body fixedly moved to the first set member, A hammer body slidably inserted into the sleeve body, a cylinder part fixed to the second set member and slidably assembled with the sleeve body, a pad provided on the cylinder part and capable of colliding with the hammer body, A hammer spring for urging the hammer body in the sleeve body in the direction of the abutment, a pin fixed to the hammer body, a guide window of the sleeve body for engaging and guiding the pin, A locking projection that stops and restricts movement of the hammer body in the contact metal direction, and when the guide concave portion and the guide convex portion coincide with each other, the amount of movement of the first set member and the second set member The relative movement amount between the sleeve body and the cylinder part due to the difference in the distance is set within a predetermined value while the pin is locked on the locking projection, and the hammer body does not collide with the abutment and does not operate audibly while the guide is activated. At the time of setting in which the positions of the concave portion and the guide convex portion are displaced, the movement of the gas cylinder is stopped halfway, the second set member is stopped, and the first set member is further moved by operating the set lever, and the sleeve body and the cylinder portion are moved. When the relative movement amount becomes equal to or more than a predetermined value, the pin of the hammer body is released from the locking projection by the first slope of the guide window of the sleeve body, and the hammer body is hit by the hammer spring against the abutment. And it is characterized in that a warning sound.

On the other hand, when the set lever is returned after the audible alarm, the pin is guided by the second slope of the guide window of the sleeve body with the return of the sleeve body, and the pin is locked by the locking projection. It is desirable to provide the automatic return.

[0010]

According to the apparatus for preventing erroneous mounting of a gas cylinder of the present invention, the amount of movement of the first set member corresponding to the amount of operation of the set lever and the amount of second movement corresponding to the amount of movement of the gas cylinder.
By providing a audible alarm that activates when the difference between the set member and the movement amount is equal to or greater than a predetermined value and issues a warning sound, when the gas cylinder is set in the normal posture, the movement amount difference is small. The audible alarm is not performed. On the other hand, when the guide concave portion is misaligned due to misalignment, the second set member stops halfway and the difference in travel distance from the first set member increases, and the audible alarm mechanism is activated. Then, the user can know the erroneous mounting by sound, and even if the set lever is operated to the set position in the erroneously mounted state, the first and second set members and the like do not deform or break. .

Further, if the alarm is activated in an erroneously mounted state and the set lever is automatically returned from the alarm generation state to the initial state when the set lever is returned, no special reset operation is required. The gas cylinder can be easily re-set, and maintenance is unnecessary because of mechanical operation.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view of a main part of a gas appliance in a state before a gas cylinder is set, and FIG. 2 is a side view showing a set lever in a released state and a set state.

The gas appliance 1 (cassette type stove) is for removably assembling a gas cylinder 2 filled with liquefied gas fuel. Each component is attached to a box-shaped chassis 8. A burner (not shown) is attached to a part of the chassis 8 to burn gas.

The gas cylinder 2 is provided with a stem 3 having a built-in shut-off valve at a gas outlet provided at the head of one end of the cylindrical container. When the stem 3 is immersed, gas is ejected from the stem 3. I do. A disk-shaped flange 4 is provided around the gas outflow portion, and a part of the flange 4 is removed to form a notched guide recess 5.

On one side of the chassis 8, there is provided a cylinder storage section A in which the gas cylinder 2 is set. In the cylinder storage section A, a governor device 9 is installed on the front side. A guide projection 10 that engages with the guide recess 5 of the gas cylinder 2 is provided. The gas cylinder 2 is connected with the stem 3 immersed, and the gas supply is adjusted by rotating the operation dial 11. The governor device 9
The gas pipe 12 is connected to the burner to supply the gas.

On the other hand, an erroneous mounting prevention device 20 which draws the gas cylinder 2 in the direction of the governor device 9 to restrict the gas cylinder 2 to the set position and warns of an erroneous mounting state is provided on the side of the cylinder storage portion A.

First, a mounting frame 13 which extends in the front-rear direction on the chassis 8 and which divides the cylinder storage section A is provided upright. An intermediate portion of a set lever 21 is attached to a front side of the mounting frame 13 by a support shaft 22 so as to be vertically rotatable. Operation part 21a of set lever 21
Project from the chassis 8 to the front side, and the operation dial 1
It is arranged adjacent to the side of 1 and is operated in the up-down direction. The upper position is the release position, and the lower position is the set position.

The rear portion of the set lever 21 is curved upward, and a cam groove 23 is formed in this portion.
An engagement pin 26 fixed to the tip of a first set member 25 described later is inserted and locked, and is linked so that the first set member 25 moves back and forth with the rotation of the set lever 21. 2A, the engagement pin 26 is located at one end of the cam groove 23, and the engagement pin 26 slides in the cam groove 23 in response to the set lever 21 being pushed down to the set position. The one set member 25 is pulled forward to the governor device 9 side, and in the set state of FIG.
Is provided so as to engage with the bent set portion 23a at the other end of the cam groove 23 to maintain this state.

The first set member 25 is supported by the mounting frame 13 so as to be able to move back and forth, and a rear end portion 25a is
It is bent to the side. This first set member 25
Is provided on a locking piece 25b bent in the horizontal direction, and a return spring 27 is provided between the locking piece 25b and the mounting frame 13 to urge the first set member 25 rearward. I have.

A second set member 28 is attached to the first set member 25 so as to be slidable in the front-rear direction along a rear portion of the first set member 25. The rear end portion 28a of the second set member 28 is bent toward the cylinder storage portion A, and a part thereof projects forward from the rear end portion 25a of the first set member 25 to abut on the container bottom of the gas cylinder 2. It is provided as possible.

An alarm 30 is interposed between the first set member 25 and the second set member 28. As shown in FIG. 7, the alarm mechanism 30 has a sleeve 33 in which a hammer 32 is inserted inside a cylinder 31 so as to be slidable. The sleeve body 33 is provided with a connecting piece 25c provided on the first set member 25.
Is fixed, and moves back and forth integrally with the first set member 25. The cylinder portion 31 is fixed to the second set member 28 and moves back and forth integrally with the second set member 28. Thus, the sleeve body 33 moves back and forth with respect to the cylinder portion 31 in accordance with the difference between the two movement amounts.

The cylinder portion 31 is provided with a pad 34 so as to be in contact with the tip of the hammer 32 inserted into the sleeve 33, and the hammer 32 and the pad 34 are provided.
A warning sound is emitted by the sound of a collision with. A sleeve spring 35 for urging the sleeve body 33 rearward is provided, and the most extended position of the sleeve body 33 is regulated by the outer projection 33a abutting on a part of the cylinder portion 31. Further, a hammer spring 36 is provided to bias the hammer body 32 toward the contact metal 34.

The hammer body 32 is provided with a pin 37 in a direction orthogonal to the moving direction. The pin 37 is inserted through a guide window 38 opened in the sleeve body 33,
Backing plate 3 of hammer body 32 formed in cylinder portion 31
It can be locked to a locking projection 39 that regulates movement in four directions. In a state where the pin 37 is disengaged from the locking projection 39,
The hammer body 32 is provided so as to be movable to a position where the hammer body 32 collides with the contact plate 34 by the urging force of the hammer spring 36.

The guide window 38 of the sleeve body 33 is used to release the pin 37 from the locking projection 39 when the sleeve body 33 moves over a predetermined value and enters the cylinder portion 31.
Hammer body 3 after sloping surface 38a and hitting plate 34
A second pin 37 for re-locking the second pin 37 to the locking projection 39.
And a slope 38b.

Next, the operation will be described with reference to FIGS.
In the state where the set lever 21 is operated to the upper release position as shown in (A), the gas cylinder 2 is placed horizontally so that the guide concave portion 5 is located above, and the position with the guide convex portion 10 is adjusted. In this state, the alarm mechanism 30 is in the state shown in FIG. 7, and when the set lever 21 is pressed down from this state,
In response to the movement, the first set member 25 moves slightly forward, and the audible alarm mechanism 30 moves the sleeve body 33 as shown in FIG.
Is slightly moved together with the hammer body 32 and the pin 37 abuts and locks on the locking projection 39, and then the second set member 28 is pressed by the stress of the hammer spring 36 and the sleeve spring 35.
Also move. The sleeve body 33 moves relative to the cylinder part 31 due to the weight of the gas cylinder 2, the movement resistance, and the like. However, since the positions of the guide concave part 5 and the guide convex part 10 coincide with each other, the set lever 21 is moved as shown in FIG. 3), the gas cylinder 2 moves to the connected state as shown in FIG. 3, and its stem 3 is immersed and pressed into the cylinder connection port of the governor device 9 so that the gas is released in a sealed state. Supplied.

In the above set state, the audible alarm mechanism 30 is shown in FIG.
As shown in (B), the sleeve body 33 is immersed in the cylinder portion 31 according to the pressing force for bringing the gas cylinder 2 into pressure contact with the governor device 9, but the amount of movement is limited by the first slope 38 a of the guide window 38. This is an amount that does not come into contact with the pin 37.
Then, the pin 37 of the hammer body 32 is locked by the locking projection 39, the movement of the hammer body 32 is prevented, and the hammer body 32 does not make a warning sound without colliding with the pad 34.

When the set lever 21 is operated in the release direction from the set state, the first set member 25 is retracted by the return spring 27, and
3 also retreats, and finally the second set member 28 retreats,
It returns to the initial state of FIG. 1 and FIG.

Next, when the position of the guide concave portion 5 and the position of the guide convex portion 10 of the gas cylinder 2 are shifted, when the set lever 21 is rotated to the set position to advance the first set member 25, first, As shown in FIG.
After the pin 37 is locked by the locking projection 39, the first set member 25 moves by an amount corresponding to the operation of the set lever 21, while the gas cylinder 2 has the guide protrusion 10 as shown in FIG. Further contact with the flange 4 prevents further movement. Accordingly, as shown in FIG. 5, the movement of the cylinder portion 31 of the alarm mechanism 30 is stopped, and the sleeve 33 is moved to the position shown in FIG.
The movement amount of (B) further moves to (C), and the difference in the movement amount increases. The first slope 38a of the guide window 38 is connected to the pin 37, and this pin 37 By rotating the hammer body 32 so that the lock is released, the hammer body 32 is rapidly moved by the hammer spring 36 when the pin 37 comes off the locking projection 39 as shown in FIG. The erroneous mounting is reported by colliding with the abutment 34 and emitting a warning sound (see FIG. 6).

In the erroneous mounting state, the stem 3 is not immersed, and the gas is not supplied from the gas cylinder 2. When the set lever 21 is operated in the release direction after the alarming operation in the erroneous mounting state, the second slope 38 b of the guide window 38 hits the pin 37 as the sleeve body 33 moves backward. The hammer body 32 is moved backward along with the contact, and the hammer body 32 is rotated along the slope to automatically return the pin 37 to a position where the pin 37 can be locked to the locking projection 39 of the cylinder portion 31. It returns to the state of 7.

According to the above-described embodiment, when the difference in the amount of relative movement between the first set member 25 and the second set member 28 in the erroneously mounted state exceeds a predetermined value, the hammer 32 is brought into contact with the contact plate 34. When the collision is notified by sound and the mounting error is notified, and the set lever 21 is released from the state, the state automatically returns from the alarm operation state to the initial state, and returns to the state in which the alarm operation is possible, This eliminates the need for a reset operation, is excellent in operability, and can reliably prevent erroneous mounting.

[Brief description of the drawings]

FIG. 1 is a main part plan view showing a gas appliance provided with an erroneous mounting prevention device in a state before setting a gas cylinder according to one embodiment of the present invention.

FIG. 2 is a side view showing a set lever in a released state and a set state.

FIG. 3 is a plan view of a main part of the gas appliance in a connected state of the gas cylinder.

FIG. 4 is a plan view of the main part showing a setting halfway state when the gas cylinder is in an incorrectly mounted state.

FIG. 5 is an enlarged view of a main part of FIG. 4;

FIG. 6 is an enlarged view showing the alarm operation state.

FIG. 7 is a cross-sectional view showing the internal structure of the alarming mechanism.

FIG. 8 is a sectional view showing the operation of the alarming mechanism.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 gas appliance (cassette stove) 2 gas cylinder 3 stem 5 guide recess 9 governor device 10 guide recess 20 incorrect mounting prevention device 21 set lever 25 first set member 27 return spring 28 second set member 30 audible alarm 31 cylinder unit 32 hammer body 33 sleeve body 34 pad 36 hammer spring 37 pin 38 guide window 38a first slope 38b second slope 39 locking projection

Claims (3)

(57) [Claims] 1. A gas appliance for setting a gas cylinder by operating a set lever while regulating a posture of the gas cylinder having a notch-shaped guide concave portion by engaging the guide concave portion with a guide convex portion of the gas appliance, A first set member that moves in response to an operation of a set lever, and a second set member that abuts on the gas cylinder and moves in response to the movement, and the amount of movement of the first set member and the second set member A device for preventing erroneous mounting of a cylinder of a gas appliance, wherein a audible alarm mechanism which is activated when the difference is equal to or greater than a predetermined value is interposed between the first set member and the second set member. . 2. A gas appliance for setting a gas cylinder by operating a set lever while regulating a posture of the gas cylinder having a notch-shaped guide concave portion by engaging the guide concave portion with a guide convex portion of the gas appliance. A first set member that moves in accordance with the setting operation of the set lever, a second set member that is slidably attached to the first set member and that has a rear end that abuts against the bottom of the gas cylinder; An alarm mechanism interposed between the two set members, wherein the alarm mechanism is fixed to the first set member and moves, and a hammer body slidably inserted into the sleeve body. A cylinder portion fixed to the second set member and slidably assembled with the sleeve member, a pad provided on the cylinder portion and capable of colliding with the hammer member, A hammer spring for urging the hammer body in the leave body in the direction of the abutment, a pin fixed to the hammer body, a guide window of a sleeve body for engaging and guiding the pin, and a hammer body resting on the pin. A locking projection for restricting movement in the gold direction, and a sleeve body and a cylinder formed by a difference in the amount of movement between the first set member and the second set member during setting when the guide concave portion and the guide convex portion coincide with each other. The hammer body does not collide with the abutment and does not perform an audible alarm while the relative movement amount with respect to the portion is within a predetermined value while the pin is locked in the locking projection, while the positions of the guide concave portion and the guide convex portion are not changed. At the time of setting, the movement of the gas cylinder is stopped halfway, the second set member is stopped, and the first set member is further moved by operating the set lever, so that the relative movement between the sleeve body and the cylinder portion. The amount of guide window of the sleeve member becomes greater than a predetermined value 1
An apparatus for preventing a gas appliance from being improperly mounted, wherein a pin of a hammer body is removed from a locking projection by a slope, and the hammer body is hit by a hammer spring against a buckle to emit a warning sound. 3. When the set lever is returned after the audible alarm is activated, the pin is guided by the second slope of the guide window of the sleeve body with the return of the sleeve body, and the pin is locked by the locking projection to automatically move the pin. The device for preventing a gas appliance from being incorrectly mounted according to claim 2, wherein the device is returned.