JP5811445B2 - Gas cylinder set mechanism - Google Patents

Description

  The present invention relates to a gas cylinder set mechanism which is provided in a gas stove used by loading a gas cylinder and prevents erroneous loading of the gas cylinder.

  A small gas stove includes a combustion section provided with a burner for burning fuel gas, and a cylinder loading section having a governor disposed adjacent to the combustion section and supplying a fuel gas of a predetermined pressure to the burner. Yes. The gas stove loads the gas cylinder in the cylinder loading section, and rotates the set operation lever provided on the front surface of the housing to move the gas cylinder with the moving plate and connect it to the governor. By operating the ignition knob in this state, the gas stove performs the opening operation of the governor and the ignition mechanism, and the fuel gas supplied to the burner is combusted.

  The gas stove is provided with a gas cylinder misload prevention mechanism that ensures that the gas cylinder is loaded into the cylinder loading section in a correct posture and that the gas cylinder is securely coupled to the governor when the set operation lever is operated. . The gas cylinder misload prevention mechanism is generally configured by forming a guide concave portion formed of a notch in the flange portion of the gas cylinder and providing a guide convex portion on the outer peripheral portion of the governor so as to face the guide concave portion (for example, Patent Documents 1 to 5). (See Patent Document 3).

  In the gas stove, when the gas cylinder is loaded into the cylinder loading section in a normal posture with the guide concave portion facing the guide convex portion and the setting operation lever is rotated, the gas cylinder slides toward the governor side. In the gas stove, the guide convex portion is fitted into the guide concave portion, so that the stem of the gas cylinder is coupled to the stem coupling portion of the governor in a normal posture.

  The gas cylinder misload prevention mechanism is designed so that when the gas cylinder is loaded into the cylinder loading section in a non-standard posture in which the guide concave portion is displaced with respect to the guide convex portion and the set operation lever is rotated, the guide convex portion becomes the flange portion. At the end, the sliding movement of the gas cylinder toward the governor is disabled. That is, the gas cylinder misload prevention mechanism disables the turning operation of the set operation lever to the set position, disables the coupling of the governor and the gas cylinder, and disables the operation of the ignition knob.

Japanese Utility Model Publication No. 05-087403 Japanese Utility Model Publication No. 06-030647 JP 09-310840 A

  However, in the gas stove, when the guide convex portion and the guide concave portion are not fitted, the set operation lever is moved to the set position by forcibly operating when the gas cylinder misload prevention mechanism is supposed to be unable to rotate. In some cases, the ignition knob could be operated. In such a case, gas leakage can be prevented by the two O-rings on the cylinder mounting side of the governor. However, if the stove body is deformed, the O-ring cannot prevent gas leakage, resulting in an accident. May occur.

  Further, in the gas stove, in order to absorb the variation in the length of the gas cylinder, the gas cylinder is pressed toward the governor by an elastic member such as a leaf spring attached to the cylinder receiving portion of the moving plate located on the back side of the cylinder loading portion. ing. In the gas stove, a certain amount of clearance is set between the guide convex portion and the guide concave portion so that smooth fitting can be performed during the setting operation by the setting operation lever. In the gas stove, for example, a casing in which a cylinder loading part or a support part for a set operation lever is formed by press bending of a slightly thin steel plate or an aluminum mold is used.

  In the gas stove, if the set operation lever is forcibly operated, the guide convex part remains in contact with the flange part, so the elastic member provided on the back side of the cylinder loading part is forcibly compressed and the gas cylinder cannot be forced into the cylinder loading part. The set operation lever may be erroneously moved to the set position in a state in which a problem such as nozzle misalignment has occurred. In the gas stove, if an elastic member with a large elastic force is used so that the gas cylinder is not fitted into the cylinder loading part when the gas cylinder is in an out-of-standard posture, the set operation lever must be operated with a large operating force, When the gas cylinder is loaded in a normal posture, the inconvenience that the gas cylinder is not coupled to the governor may occur.

  Further, in the gas stove, the set operation lever may be erroneously moved to the set position due to plastic deformation of the housing due to the forcible operation of the set operation lever. In a gas stove, it is possible to suppress the occurrence of plastic deformation by forming the casing with a thick material, but there is a problem that the weight increases and the cost increases.

  Accordingly, an object of the present invention is to provide a gas cylinder set mechanism that can solve the above-described problems of the conventional gas cylinder misloading prevention mechanism and reliably prevent erroneous loading of the gas cylinder.

  The gas cylinder set mechanism according to the present invention that achieves the above-described object is provided with a guide formed in a flange portion with respect to the guide convex portion in a cylinder loading portion in which a governor for supplying fuel gas to the burner is disposed and a guide convex portion is provided. In a state where the gas cylinder is loaded with the posture where the recesses face each other as a normal posture, the set operation lever is rotated, and the gas cylinder is moved to the governor side by the moving plate so that the guide convex portion and the guide concave portion are relatively fitted with each other. This is a gas cylinder setting mechanism in which the gas cylinder stem is coupled to the governor to supply fuel gas.

  The moving plate has a cylinder receiving portion that presses the gas cylinder inserted into the cylinder loading portion toward the governor, and along the partition plate that partitions the burner side and the cylinder loading portion, the loading position of the gas cylinder and the gas cylinder It moves over the coupling position where the stem and the governor are coupled, and is urged in the direction of the loading position by the urging member.

The set operation lever is rotatably attached to the partition plate, and is engaged with the cam pin of the moving plate and rotated from the initial position to the set position, thereby moving the moving plate from the loading position to the coupling position. A cam hole and an elastic displacement portion that can be elastically displaced in the direction of the set position are provided. The elastic displacement portion is U-shaped, and is elastically displaced in the direction in which the end portions are close to each other.

  When the set operation lever is turned from the initial position toward the set position when the gas cylinder is not loaded in the cylinder loading section in the normal posture, the flange of the gas cylinder hits the guide convex part, and the moving plate is connected. When the movement to the position is restricted before the coupling position, the elastic displacement part is elastically displaced in the direction of the set position, and the operation force to the set operation lever is released, the elastic displacement part is elastically restored and further biased. The moving plate is returned to the loading position by the member, and the set operation lever is returned to the initial position.

According to the present invention, when the gas cylinder is not loaded in the normal posture, even if the set operation lever is rotated with an excessive operation force, the guide convex portion hits the flange portion of the gas cylinder and the elastic displacement portion is set to the set position. Absorbs excessive operating force by elastic displacement in the direction. The elastic displacement portion is U-shaped, and is elastically displaced in the direction in which the end portions are close to each other. Accordingly, in the present invention, in a state where the gas cylinder is not loaded in a normal posture, the moving plate does not move to the coupling position due to excessive operation force, so that the gas cylinder does not move to the governor side, and the gas cylinder is coupled to the governor. Can be prevented.

It is a perspective view of a desktop gas stove provided with a gas cylinder misloading prevention mechanism according to the present invention and a gas cylinder. It is a principal part top view which shows the structure of the cylinder loading part which loads the gas cylinder of the tabletop type gas stove with a cover body opened. It is a principal part perspective view of the cylinder loading part. It is a principal part perspective view which shows the state by which the gas cylinder loaded with the normal attitude | position was set to the cylinder loading part. It is a principal part perspective view of the cylinder loading part in the state in which the gas cylinder was loaded by the non-regular attitude | position. It is a principal part perspective view which shows the structure of the gas cylinder set mechanism which sets the gas cylinder of the desktop type gas stove. It is a side view which shows the state of the gas cylinder set mechanism before loading a gas cylinder in a cylinder loading part. It is a side view which shows the state of a set operation lever, (A) is a state before loading a gas cylinder in a cylinder loading part, and is a side view which shows the state in which a cam pin is located in the unlock part of a cam hole. And (B) is a side view showing a state in which the cam pin is located at the intermediate portion of the cam hole, and (C) is a side view showing a state in which the cam pin is located at the lock portion of the cam hole. is there. It is a side view of the gas cylinder set mechanism which shows a state where the operation knob is lowered and the guide pin is located at the intermediate portion of the cam hole. It is a side view of the gas cylinder set mechanism which shows a state where the operation knob is further lowered and the guide pin is located at the lock portion of the cam hole. It is a side view which shows the state of a set operation lever at the time of forcibly lowering an operation knob in the state where the gas cylinder was loaded in the non-regular posture. It is a side view of the set operation lever which is another Example of a set operation lever. It is an expanded view of the other Example of a set operation lever.

  Hereinafter, a desktop gas stove (hereinafter abbreviated as a stove) 1 including a gas cylinder set mechanism capable of preventing erroneous loading of a gas cylinder according to the present invention will be described in detail. The stove 1 has a basic configuration similar to that of a conventionally known general stove, and includes an erroneous loading prevention mechanism 2 that prevents erroneous loading of a gas cylinder. As shown in FIG. 1, the stove 1 uses a gas cylinder 3 as a fuel source, and burns fuel gas supplied from the gas cylinder 3. The stove 1 combines a box-shaped casing (decorative frame) 4 with a chassis, a combustion section 7 provided with a burner 6 via a partition plate 5, and a cylinder loading section 8 adjacent to the combustion section 7. The cylinder loading section 8 is opened and closed by the lid body 9. The stove 1 opens the lid 9 and loads the gas cylinder 3 into the cylinder loading section 8. The erroneous loading prevention mechanism 2 detects this when the gas cylinder 3 is loaded into the cylinder loading unit 8 in an irregular posture, and prohibits the setting operation of the gas cylinder 3.

  As the gas cylinder 3, a conventionally known general gas cylinder is used, and a mountain cup provided with a stem 10, a valve mechanism and the like is fitted to the front end portion 3 a side of the cylindrical container body. When the stem 10 is pushed into the gas cylinder 3, the valve mechanism is opened and fuel gas is injected from the stem 10. The gas cylinder 3 is formed with a flange portion 11 that integrates the outer peripheral portion of the mountain cup with the container body, and a notch-shaped guide recess 12 is formed at a predetermined position of the flange portion 11. As will be described later, the gas cylinder 3 is attached to and detached from the cylinder loading section 8 of the stove 1 with the guide recess 12 aligned with a predetermined position.

  As shown in FIGS. 1 and 2, the stove 1 has an ignition knob 13 and a knob portion of a set operation lever 15 constituting a gas cylinder set mechanism 14, which will be described in detail later, on a front surface of the housing 4 facing the cylinder loading portion 8. An operation knob 15a is provided. As will be described later, the stove 1 operates normally only when the gas cylinder 3 is loaded in the cylinder loading unit 8 in a normal posture and is connected to the governor 16 and set. In the stove 1, the fuel gas is supplied from the gas cylinder 3 to the burner 6 by rotating the ignition knob 13.

  The ignition knob 13 operates an igniter (not shown) provided in the combustion unit 7 to ignite the fuel gas so that the combustion is performed, and also cuts off the supply of the fuel gas from the gas cylinder 3 to extinguish the fire. Fire extinguishing operation is also performed. The ignition knob 13 also controls the amount of fuel gas supplied to the burner 6 to adjust the heating power.

  In the stove 1, the set operation lever 15 pushes down the operation knob 15a provided on the front surface of the housing 4 along the height guide hole 4a formed in the housing 4 downward in FIG. Thus, the setting operation of the gas cylinder 3 loaded in the cylinder loading unit 8 is performed. As will be described in detail later, the stove 1 allows the set operation lever 15 to be set in a state where the gas cylinder 3 is loaded in the cylinder loading unit 8 in a normal posture, and the gas cylinder 3 is non-regular in the cylinder loading unit 8. The set operation lever 15 cannot be set in the loaded state.

  As shown in FIG. 1, the cylinder loading portion 8 is configured as a cylindrical space portion in the front-rear direction sufficient to accommodate the gas cylinder 3 therein, and has a bottom portion formed in an arc shape in accordance with the outer peripheral surface of the gas cylinder 3. And the lid 9 is opened and closed by a circular arc-shaped lid body 9. As shown in FIG. 2, the governor 16 is fixed to the governor loading portion 17 on the front side of the cylinder loading portion 8.

  As shown in FIGS. 2 and 3, the governor 16 is formed with a cylindrical stem fitting portion 18 having a fitting hole into which the stem 10 of the gas cylinder 3 is fitted on the outer peripheral portion facing the gas cylinder 3. In addition, a gas flow path communicating with the fitting hole is formed inside. The governor 16 incorporates a valve mechanism (not shown) whose opening and closing amount of the gas flow path is controlled by the ignition knob 13. The governor 16 opens the valve mechanism of the gas cylinder 3 when the stem 10 of the gas cylinder 3 is fitted and pushed into the fitting hole of the stem fitting portion 18.

  As shown in FIGS. 2 and 3, the governor 16 is integrally formed with a guide convex portion 19 constituting the erroneous loading prevention mechanism 2 on the outer peripheral portion of the ceiling portion. The guide convex portion 19 is formed as a convex portion protruding toward the gas cylinder 3 at a position facing the guide concave portion 12 of the gas cylinder 3 loaded in the cylinder loading section 8. The guide convex portion 19 is a substantially wedge-shaped convex portion that is slightly smaller than the notch width of the guide concave portion 12 of the gas cylinder 3.

  In the stove 1, the loading posture of the gas cylinder 3 loaded in the cylinder loading unit 8 is detected by the erroneous loading prevention mechanism 2, and the operation of coupling the gas cylinder 3 to the governor 16 or the erroneous loading prevention operation of not coupling the gas cylinder 3 to the governor 16 is performed. The As shown in FIG. 4, the erroneous loading prevention mechanism 2 detects that the guide protrusion 19 is loaded in a normal posture when the guide protrusion 19 is relatively fitted to the guide recess 12 described above. Further, as shown in FIG. 5, the erroneous loading prevention mechanism 2 is loaded in a normal posture because the guide convex portion 19 does not fit into the guide concave portion 12 and the guide convex portion 19 abuts against the flange portion 11 of the gas cylinder 3. It is detected that the gas cylinder 3 moves to the governor 16 side in a state where the gas cylinder 3 is not in the normal posture. The erroneous loading prevention mechanism 2 performs an erroneous loading prevention operation that disables the setting operation of the setting operation lever 15 of the gas cylinder setting mechanism 14. Thereby, in the stove 1, the stem 10 of the normal gas cylinder 3 is not coupled to the governor 16.

  As shown in FIG. 1, the stove 1 inserts the gas cylinder 3 into the cylinder loading portion 8 and moves the gas cylinder 3 toward the governor 16 by the gas cylinder set mechanism 14, and the stem 10 is connected to the governor 16 as shown in FIG. 4. Mate. As shown in FIGS. 2 and 6, the gas cylinder set mechanism 14 includes a partition plate 5 that partitions the burner 6 side and the cylinder loading portion 8, a moving plate 20 that moves the gas cylinder 3 toward the governor 16, and a moving plate 20. It has a set operation lever 15 that moves to the governor 16 side, and a biasing member 21 that biases the moving plate 20 in the direction of the loading position X (see FIG. 2).

  The partition plate 5 is formed in a long plate shape as shown in FIGS. 1, 6 and 7, and partitions the burner 6 side and the cylinder loading portion 8, and includes a moving plate 20, a set operation lever 15, and an urging force. A member 21 is attached. A guide hole 22 that guides the movement of the moving plate 20 is formed in the partition plate 5. The guide hole 22 is formed in an elongated shape in the length direction of the partition plate 5, and a cam pin 26 serving as a guide pin for the moving plate 20 is inserted therethrough.

  As shown in FIG. 1, the moving plate 20 is formed in an elongated shape in the length direction of the partition plate 5 and is movably attached to the partition plate 5. The moving plate 20 extends to the burner 6 side, and is folded at one end facing the rear end portion 3b of the gas cylinder 3 loaded in the cylinder loading portion 8 through the guide opening 5b formed in the partition plate 5. A cylinder receiving part 23 is provided so as to be bent and protrude into the cylinder loading part 8. The cylinder receiver 23 faces the rear end 3 b of the gas cylinder 3 loaded in the cylinder loading unit 8. The cylinder receiving portion 23 is provided with an elastic member 24 such as a leaf spring that is displaced in the pressing direction of the gas cylinder 3 in order to absorb variations in the length of the gas cylinder 3.

  As shown in FIGS. 6 and 7, the moving plate 20 has a cam pin 26 inserted through the end on the governor 16 side. The cam pin 26 is engaged with the guide hole 22 of the partition plate 5 and the cam hole 25 of the set operation lever 15. Further, the moving plate 20 is exposed to the cylinder loading portion 8 side from the guide opening portion 5 b formed in the partition plate 5 at the end portion on the rear end portion 3 b side of the gas cylinder 3. The moving plate 20 is supported so as to be movable along the partition plate 5 by a cam pin 26 engaged with the guide hole 22 and a guide opening 5b. The movable plate 20 is connected to the set operation lever 15 by the cam pin 26 engaging with the cam hole 25 of the set operation lever 15.

  Further, as shown in FIGS. 1 and 3, the moving plate 20 is integrally formed with a hook piece 27 protruding into the cylinder loading portion 8, and the hook piece 27 extends along the partition plate 5. When moving, it engages with a container flange 3c provided on the front end 3a side of the container body of the gas cylinder 3.

  As shown in FIGS. 6 and 7, the cam pin 26 is provided through the moving plate 20, and one end engages with the cam hole 25 and the other end engages with the guide hole 22 of the partition plate 5. . The moving plate 20 is slidably attached to the partition plate 5, and the cam pin 26 moves in the cam hole 25 in accordance with the shape of the cam hole 25 as the set operation lever 15 rotates. And slide.

  When the user of the stove 1 lowers the operation knob 15a along the guide hole 4a formed in the casing 4, the cylinder setting mechanism 14 presses the gas cylinder 3 toward the governor 16 and the operation knob 15a is operated. To release the pressure on the governor 16 side of the gas cylinder 3 of the cylinder setting mechanism 14. In a state where the gas cylinder 3 is inserted into the cylinder loading portion 8 and the gas cylinder 3 is located at the loading position X (see FIG. 2) and is not pressed toward the governor 16, as shown in FIGS. Is located at the initial position P of the upper end of the guide hole 4a. Then, the operation knob 15a is rotated from the initial position P in the direction of arrow A in FIG. 6, and the gas cylinder 3 is pressed toward the governor 16 by the cylinder receiving portion 23. As shown in FIGS. In the state where it is located at the coupling position Y (see FIG. 1) coupled to 16, the operation knob 15a is located at the set position Q at the lower end of the guide hole 4a. Thus, the set operation lever 15 is attached to the partition plate 5 so as to rotate between the initial position P and the set position Q by the operation knob 15a moving up and down the guide hole 4a.

  As shown in FIG. 6, the set operation lever 15 has a main body portion 31, an arm portion 32 with an operation knob 15 a attached to the tip, an elastic displacement portion 33, and an attachment portion 35. The set operation lever 15 is configured by attaching an operation member having an arm portion 32, an elastic displacement portion 33, and an attachment portion 35 as one component to the main body portion 31. That is, the set operation lever 15 includes two parts, that is, an operation member and the main body 31.

  The main body 31 is rotatably supported on the partition plate 5 by a fulcrum shaft member 34 provided on the partition plate 5. The main body 31 is formed in a forward and downward shape on the opposite side of the arm portion 32 with the fulcrum shaft member 34 interposed therebetween, and a cam hole 25 is formed in which a cam pin 26 provided on the moving plate 20 is engaged. . When the operation knob 15a rotates from the initial position P to the set position Q, the main body 31 rotates in the same direction as the operation knob 15a as shown in FIGS. 9 is moved along the cam hole 25, and the moving plate 20 is moved from the loading position X of the gas cylinder 3 toward the coupling position Y as shown in FIG.

  The cam hole 25 includes an unlock portion 25a that positions the moving plate 20 at the loading position X of the gas cylinder 3, a lock portion 25b that positions the moving plate 20 at the coupling position Y of the gas cylinder 3, an unlock portion 25a, and a lock portion 25b. The intermediate part 25c located between the two is continuously formed. The cam hole 25 is not formed linearly from the unlock portion 25a to the lock portion 25b, but is formed by being bent at the intermediate portion 25b, whereby the moving plate 20 is urged toward the loading position X by the urging member 21. However, the cam pin 26 is held by the lock portion 25b, and the coupled state between the gas cylinder 3 and the governor 16 is held.

  Further, an elastic displacement portion 33 that is elastically displaceable in the rotational direction of the operation knob 15a is attached to the main body portion 31 on the side facing the cam hole 25 with the fulcrum shaft member 34 interposed therebetween via an attachment portion 35. An arm portion 32 to which the operation knob 15a is attached is attached via the elastic displacement portion 33.

  The elastic displacement part 33 is an elastic member using a material having a restoring force such as SK or SUS. The elastic displacement portion 33 is formed in a U shape as shown in FIG. 6 and is elastically displaced in the rotation direction of the operation knob 15a, that is, in the direction of the set position Q so that the end portions are close to each other. One end of the elastic displacement portion 33 is connected to the upper end of the attachment portion 35 by welding or the like. The elastic displacement portion 33 is hardly elastically displaced even when the operation knob 15a is rotated in the set position Q direction (arrow A direction in FIG. 6) when the gas cylinder 3 is loaded into the cylinder loading section 8 in a normal posture. In this state, the end portions are separated from each other. On the other hand, the elastic displacement portion 33 forcibly rotates the operation knob 15a from the initial position P toward the set position Q as will be described later when the gas cylinder 3 is not loaded in the cylinder loading section 8 in the normal posture. If a large force is applied, the operation knob 15a is elastically displaced in the direction in which the ends of the operation knob 15a approach each other, absorbs excessive operation force, and moves the operation knob 15a to the set position without moving the gas cylinder 3 to the governor 16 side. Reach up to Q. Thereby, since the gas cylinder 3 does not move to the governor 16 side, it is not coupled to the governor 16. Then, when the operation knob 15a reaches the lower end of the guide hole 4a and releases the operation force, the elastic displacement portion 33 returns to the initial position P by elastic return.

  As shown in FIG. 6, the attachment portion 35 is formed in a plate shape, one end is attached to the partition plate 5 together with the main body portion 31 by a fulcrum shaft member 34, and the other end is fixed to the main body portion 31 by, for example, a screw 36. ing.

  As shown in FIG. 6, the arm portion 32 is provided integrally with the other end of the elastic displacement portion 33, and a guide hole 37 a formed in the chassis 37 and a guide hole 4 a in the height direction formed in the front surface of the housing 4. The operation knob 15a is attached to the tip.

  Further, the gas cylinder set mechanism 14 returns the set operation lever 15 from the set position Q to the initial position P, so that the movable plate 20 returns from the coupling position Y to the load position X. Therefore, as shown in FIG. It has a biasing member 21 biasing to the side. The urging member 21 is hooked between the hook piece 5a of the partition plate 5 and the hook piece 27 of the moving plate 20, and is in a pulled state when the moving plate 20 is located at the coupling position Y. Is urged in the direction of the loading position X.

  The gas cylinder set mechanism 14 configured as described above can prevent erroneous loading of the gas stove 1 as follows.

  First, a case where the gas cylinder 3 is loaded in a normal posture will be described. In a state before the gas cylinder 3 is loaded in the cylinder loading section 8, as shown in FIG. 7, the urging member 21 pulls the moving plate 20 to the rear side, that is, the loading position X side by the urging force. As shown in FIG. 8 (A), the gas cylinder set mechanism 14 is configured such that the cam pin 26 is positioned at the upper end side in the cam hole 25, that is, the unlock portion 25a, and the arm portion 32 and the operation knob 15a of the set operation lever 15 connected. Is located at the upper end of the guide hole 4a, that is, at the initial position P.

  Next, after the gas cylinder 3 is inserted and loaded into the cylinder loading section 8 so that the guide convex portion 19 provided in the governor 16 and the guide concave portion 12 provided in the gas cylinder 3 face each other, the operation knob 15a is guided. When pushed down to the center of the hole 4a, as shown in FIGS. 8B and 9, the arm portion 32 of the set operation lever 15 is also rotated downward along with the rotation of the operation knob 15a, and the fulcrum shaft member 34 is moved. As a fulcrum, the main body 31 rotates in the direction of arrow B in FIG. The cam pin 26 engaged with the cam hole 25 of the main body 31 is moved forward from the unlock portion 25a, that is, in the direction of arrow C in FIG. Move to 25c. In the gas cylinder set mechanism 14, the moving plate 20 is pulled by the cam pin 26 and moves in the coupling position Y direction indicated by the arrow D in FIG. 9 against the urging force of the urging member 21. In the gas cylinder set mechanism 14, when the moving plate 20 moves to the coupling position Y, the cylinder receiver 23 moves in the cylinder loading section 8 from the loading position X to the coupling position Y side, and moves the gas cylinder 3 to the governor 16 side. Press (in the direction of arrow D in FIG. 9).

  Then, when the operation knob 15a is pushed down to the lower end of the guide hole 4a, that is, the set position Q, as shown in FIGS. 8C and 10, the gas cylinder 3 in which the cylinder receiving portion 23 is loaded in the normal posture is moved to the governor 16 side. Further, the guide convex portion 19 is fitted into the guide concave portion 12, the stem 10 of the gas cylinder 3 is pushed into the stem fitting portion 18, and the stem 10 and the stem fitting portion 18 of the gas cylinder 3 are joined at the coupling position Y. Are combined. At this time, in the cylinder setting mechanism 14, the cam pin 26 moves in the cam hole 25 of the main body portion 31 and is held in the lock portion 25 b, so that the gas cylinder 3 is connected to the governor 16. As a result, the fuel gas is supplied from the gas cylinder 3 to the governor 16.

  Next, a case where the gas cylinder 3 is loaded in a state where it is not in a normal posture will be described. Before the gas cylinder 3 is loaded, as described above, the operation knob 15a is positioned at the initial position P of the guide hole 4a, the cam pin 26 is positioned at the unlocked portion 25a of the cam hole 25, and the cylinder receiving portion 23 is It is located at the loading position X of the loading unit 8.

  When the operation knob 15a is pushed down, as described above, the cam pin 26 moves in the direction of arrow C in FIG. 9, so that the moving plate 20 moves to the coupling position Y side in the direction of arrow D in FIG. 23 presses the gas cylinder 3 to the coupling position Y side, and the gas cylinder 3 moves to the coupling position Y side. Here, since the gas cylinder 3 is not loaded in a normal posture, the guide convex portion 19 does not fit into the guide concave portion 12 of the gas cylinder 3 but hits the flange portion 11, and the gas cylinder 3 cannot move to the coupling position Y, and the moving plate 20 Therefore, even if the operation knob 15a is pushed down to the set position Q, it cannot be pushed down as in the normal posture.

  When the operation knob 15a is pushed down with a large force (for example, a force of about 150N load) exceeding a normal operation force (for example, a force of about 40N load), the cam pin has conventionally moved to the lock portion of the guide groove. When the movable plate is pulled to the coupling position by being pulled by the guide pin, the gas cylinder may be coupled to the governor in a state where the gas cylinder is not in the normal posture. In the gas cylinder set mechanism 14 described above, when the operation knob 15a is pushed down with a large force exceeding the normal operation force, the elastic displacement portion 33 is elastically displaced in the rotational direction of the operation knob 15a as shown in FIG. The arm 32 moves down to the set position Q of the guide hole 4a together with the operation knob 15a, but the cam pin 26 remains positioned at the intermediate portion 25c of the cam hole 25 and the moving plate 20 does not move to the coupling position Y, so that the gas cylinder 3 is coupled. Does not move toward position Y.

  Even if the gas cylinder set mechanism 14 forcibly pushes down the operation knob 15a, as shown in FIG. 11, the elastic displacement portion 33 composed of a leaf spring or the like rotates the operation knob 15a (in the direction of arrow A in FIG. 11). As a result of the elastic displacement, the excessive operating force is absorbed, and only the operation knob 15a and the arm part 32 rotate toward the set position Q, and the operation knob 15a and the arm part 32 hit the lower end of the guide hole 4a. The elastic displacement portion 33 has a hardness that does not cause elastic displacement in normal use in which the gas cylinder 3 is loaded in a normal posture.

  When the operation knob 15a hits the guide hole 4a and the force of pushing down is released, the elastic displacement portion 33 is elastically restored, and the operation knob 15a and the arm portion 32 return to the initial position P of the guide hole 4a. As a result, in this gas cylinder set mechanism 14, the cam pin 26 moves from the intermediate portion 25c of the cam hole 25 to the unlock portion 25a, and the moving plate 20 returns to the loading position X, so that the gas cylinder 3 is also loaded away from the governor 16. Return to position X.

  As described above, in the gas cylinder set mechanism 14, when the gas cylinder 3 is loaded not in the normal posture, even if the operation knob 15 a is forcibly pushed down to the set position Q, the elastic displacement portion 33 displaces excessive operation force. Since the cam pin 26 does not move to the lock portion 25c and the moving plate 20 does not move to the coupling position Y, the stem 10 of the gas cylinder 3 is prevented from being coupled to the governor 16, and erroneous loading of the gas cylinder 3 is prevented. Can be prevented. Further, in the gas cylinder set mechanism 14, since the operation knob 15a returns to the initial position P, it can be seen that the gas cylinder 3 is not normally attached. Further, in this gas cylinder set mechanism 14, since it is not necessary to increase the elastic force of the elastic member 24 attached to the cylinder receiving portion 23 in order to prevent erroneous loading, the operation force of the operation knob 15a is different from the conventional one. It can be operated without. In the gas cylinder set mechanism 14, when the operation knob 15 a is forcibly operated, the elastic displacement portion 33 is elastically displaced and absorbs an excessive operation force, so that the casing 4 is not deformed and the flange portion 11 of the cylinder 3 is not generated. Therefore, there is no need to use a thick casing 4 or the like, and it is possible to prevent an increase in weight and an increase in cost.

  In the gas cylinder set mechanism 14 described above, the arm portion 32, the elastic displacement portion 33, and the attachment portion 35 are constituted by two parts in which the operation member constituted as one part is attached to the main body portion 31. Without being limited thereto, as shown in FIG. 12, the operation member and the main body 31 may be configured as a single component. As shown in FIG. 13, the main body portion 31, the arm portion 32, the elastic displacement portion 33, and the attachment portion 35 are made of an elastic member using a material having a restoring force such as SK or SUS used for the elastic displacement portion 33. 12 is formed as shown in FIG. 12 by bending a single plate-like member formed in the shape of the main body 31 or the like. In the gas cylinder set mechanism 14, by adopting such a configuration, it is possible to prevent erroneous loading of the gas cylinder 3 described above, it is not necessary to increase the elastic force of the elastic member 24 attached to the cylinder receiving portion 23, and the housing In addition to the effect that it is not necessary to increase the thickness of 4, the number of parts can be reduced, and the step of connecting the operation member and the main body 31 can be omitted.

  1 Stove, 2 Incorrect loading prevention mechanism, 3 Gas cylinder, 4 Housing, 4a Guide groove, 5 Partition plate, 6 Burner, 7 Combustion section, 8 cylinder loading section, 9 Lid, 10 Stem, 11 Flange section, 12 Guide section , 13 Ignition knob, 14 Gas cylinder set mechanism, 15 Operation lever, 16 Governor, 17 Governor mounting part, 18 Stem fitting part, 19 Guide convex part, 20 Moving plate, 21 Energizing member, 22 Guide hole, 23 Cylinder receiving part , 24 Elastic member, 25 Cam hole, 26 Cam pin, 27 Hook piece, 31 Body portion, 32 Arm portion, 33 Elastic displacement portion, 34 Support shaft member, 35 Mounting portion, 36 Screw, 37 Chassis, 37a Guide hole

Claims (5)

A state in which a gas cylinder is loaded with an orientation in which the guide concave portion formed in the flange portion is opposed to the guide convex portion in the cylinder loading portion provided with the guide convex portion and the governor for supplying fuel gas to the burner is disposed. The gas cylinder stem is moved by rotating the set operation lever and moving the gas cylinder to the governor side with a moving plate to relatively fit the guide convex part and the guide concave part. In the gas cylinder set mechanism that is coupled to the governor so that the fuel gas is supplied.
The moving plate has a cylinder receiving portion that presses the gas cylinder inserted into the cylinder loading portion toward the governor, and the gas cylinder is loaded along a partition plate that partitions the burner side and the cylinder loading portion. Is moved across the loading position and the coupling position for coupling the gas cylinder stem and the governor, and is biased by the biasing member in the direction of the loading position,
The set operation lever is rotatably attached to the partition plate, and is engaged with a cam pin of the moving plate and rotated from an initial position to a set position, thereby moving the moving plate from the loading position. A cam hole to be moved to the coupling position and an elastic displacement portion capable of elastic displacement in the direction of the set position;
The elastic displacement portion is U-shaped and is elastically displaced in the direction in which the end portions are close to each other.
When the set operation lever is rotated from the initial position toward the set position in a state where the gas cylinder is not loaded in a normal posture in the cylinder loading section, the flange portion of the gas cylinder is formed on the guide convex portion. At the end, the movement of the movable plate to the coupling position is restricted before the coupling position, the elastic displacement part is elastically displaced in the direction of the set position, and the operation force on the set operation lever is released. A gas cylinder set mechanism in which the elastic displacement portion is elastically restored, the movable plate is returned to the loading position by the biasing member, and the set operation lever is returned to the initial position. The cam hole includes an unlock portion that positions the movable plate at the loading position, a lock portion that positions the movable plate at the coupling position, and an intermediate portion positioned between the unlock portion and the lock portion. And
When the gas cylinder is not loaded in a normal posture in the cylinder loading portion, the flange portion of the gas cylinder hits the guide convex portion, and the cam pin is restricted from moving from the intermediate portion toward the lock portion. Item 2. A gas cylinder set mechanism according to Item 1. The set operation lever is attached to one end of the elastic displacement portion with an arm portion for attaching a knob.
The outer casing is provided with a guide hole through which the arm portion is inserted and the knob portion is exposed to the outside.
3. The gas cylinder set according to claim 1, wherein when the gas cylinder is not loaded in a normal posture in the cylinder loading portion, the elastic displacement portion is elastically displaced until the arm portion hits an end of the guide portion. mechanism. 2. The set operation lever, wherein the elastic displacement portion is provided in a main body portion provided with the cam hole, and the main body portion and the elastic displacement portion are integrally coupled by separate members. The gas cylinder set mechanism according to claim 3 . The gas cylinder set mechanism according to any one of claims 1 to 3 , wherein the set operation lever is a part in which a main body portion provided with the cam hole and the elastic displacement portion are integrally provided.

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