JPH0333969B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press operation device mainly used in an ignition operation device for gas appliances.

The applicant of the present application has previously proposed an ignition operating device of this kind in Japanese Patent Application No. 58-209935, in which an operating rod is provided in a fixed frame so that it can be pressed freely against a return spring, and the operating rod can be returned from the pressing end position. The operation is locked at the intermediate position, and the lock at the intermediate position is released by a pressing operation from the intermediate position to a lock release position before the terminal position, and the operating rod is returned to the starting position. Using a push-operation device with a push-up mechanism, pushing the operating rod to the end position activates the igniter, electromagnetic safety valve, or other igniting operated member to ignite the burner; Upon return, the ignition operation is stopped and the burner burns steadily, and when pressing again from the intermediate position, the operating rod is moved from the unlocked position before the final position to the starting position without activating the ignition operated member again. We proposed a system that would allow the burner to be extinguished by returning to its position.

Here, the push push mechanism includes a guide member in which a cam groove is formed on one side of the fixed frame and the operating rod, and a swingable engager that is elastically inserted into the cam groove on the other side. It is constructed by applying the heart cam mechanism known from, for example, Japanese Patent Publication No. 40-1767 and Utility Model Publication No. 43-12334, that is, the cam groove is a groove corresponding to the starting end position of the operating rod. The guide member is formed into a deformed heart shape that returns from the position to the groove corresponding to the starting position through groove positions corresponding to the terminal position, the intermediate position, and the unlocking position, and the guide member and the engagement are By moving relative to the engaging element, the engaging element moves within the cam groove, thereby guiding the movement of the operating rod as described above.

In this case, at the terminal position, the operated member is pushed all the way to restrict the position of the operating rod against the pressing operation, but at the unlocked position, such restricting force does not work, and when pressed strongly, it corresponds to the unlocked position. The engaging element may float up and come off the cam groove due to being pushed by the groove wall at the groove position.
According to No. 1, a stopper is provided on the opposite side of the insertion direction of the engaging element to abut against the engaging element and prevent the insertion end of the engaging element from floating above the plate surface of the guide member,
We have proposed an arrangement that can prevent the engaging element from coming off the cam groove.

However, in this device, the stopper is generally provided so as to face the engager over substantially the entire range of the swing angle of the engager, and according to this, the stopper is provided so as to face the engager over substantially the entire range of the swing angle of the engager. It is necessary to set the arrangement height of the stopper so that the engager does not come into contact with the stopper even when it follows the change in the depth of the cam groove and rides on the shallowest groove part, The floating of the engager at the groove position corresponding to the unlocked position cannot be restricted to a position deeper than the groove depth of this shallowest groove portion, and the engagement between the engager and the groove wall at the groove position is This results in the disadvantage that the amount of engagement is small, and the insertion end of the engager may bend and come off the cam groove.

An object of the present invention is to provide an improvement on the previous proposal that eliminates such inconvenience, and the purpose of the present invention is to provide an improvement on the previous proposal in which the engager is engaged in a groove position corresponding to the unlocked position on the opposite side of the insertion direction of the engager. The present invention is characterized in that a stopper is provided to suppress the floating of the engaging element as much as possible so as to face the engaging element only when the engaging element is in the oscillation angle position where the engaging element is aligned.

Next, the present invention will be explained with reference to the illustrated embodiments.

The illustrated embodiment is an application of the device of the present invention as an ignition operating device for gas appliances. In FIG. The shutoff valve 3 and the safety valve 2 are arranged coaxially in front and behind each other, and the rear end of the valve rod 5 of the shutoff valve 3 is connected to the safety valve 2.
Further, a fixed frame 6 is provided at the front end of the unit 1.
An operating rod 7, which faces the front end of the valve rod 5, is inserted into the fixed frame 6 so as to be slidable in the front-rear direction, and the front end of the operating rod 7 is attached to the front panel 8 of the gas appliance. The push button 9 is brought into elastic contact with the spring 9a,
In this way, the operating rod 7 is connected to the front panel 8 of the push button 9.
From the starting end position A indicated by the solid line whose position is regulated by contact with the push button 9, the push button 9 can be returned to the rear end position B by about 10 mm, for example, as shown in FIG. A push mechanism 10, which will be described later, is attached to the operating rod 7, and the returning operation of the operating rod 7 from the end position B to the starting end position A is stopped at an intermediate position C about 5.5 mm from the starting end position A. By pressing again from intermediate position C, this can be moved from intermediate position C, for example, before terminal position B.
When pushed to the unlocking position D of about 1.5 mm, the locking at the intermediate position C is released and the operating rod 7 is returned to the starting position A.

According to the pressing operation of the operating rod 7 from the starting end position A to the ending position B, the operating rod 7 first comes into contact with the valve rod 5 at point A in FIG. 7, and the shutoff valve 3 begins to open. , and then the valve rod 5 at point B beyond intermediate position C.
The electromagnetic safety valve 2 begins to be opened by pressure through the terminal position B, and the ignition switch 11 provided on the fixed frame 6 is further pushed by the cam protrusion 12 on the operating rod 7 and closed at point C near the terminal position B. When the operating rod 7 returns to the intermediate position C, the ignition switch 11 is opened and the pressure on the safety valve 2 is released, causing the burner to undergo steady combustion. I made it possible to be given. In this case, the safety valve 2 is attracted and held in an open state by an output from a flame detection element such as a thermocouple facing the burner.

When extinguishing a fire, the operating rod 7 is pressed again from the intermediate position C to return it to the starting position A, and the shutoff valve 3 is closed to cut off the gas supply to the burner.
In this case, the operating rod 7 is returned to the starting end position A from the unlocked position D before it without being pushed again to the end position B, and the ignition switch consisting of the electromagnetic safety valve 2 and the ignition switch 11, which must be operated only at the time of ignition. This prevents unnecessary operation of the operated member.

As shown in FIGS. 1 and 2, the push mechanism 10 includes a guide member 14 in which a cam groove 13 is formed in one of the fixed frame 6 and the operating rod 7, and a spring member in the cam groove 13 in the other. In the illustrated example, the guide member 14 is fixed to the operating rod 7, and the engager 15 is formed of a U-shaped rod. Its tail end is pivotally supported on the fixed frame 6 so as to be able to swing freely, and its tip end is inserted into the cam groove 13 while being biased toward the guide member 14 by a leaf spring 16 as a spring member, The insertion end 15a at the lower end of the tip is brought into elastic contact with the bottom surface of the cam groove 13.

As shown in FIG. 3, the cam groove 13 moves from a groove position a corresponding to the start end position A to the end position B, intermediate position C, unlocking position D, and corresponding groove positions b, c, and d. It is formed in a deformed heart shape that returns to the groove position a through the guide member 14. The relative movement of the engager 15 causes it to vibrate in the cam groove 13 from groove position a to groove position b, groove position c, groove position d, and returns to groove position a, and then returns to groove position c. The engager 15 to the groove wall 13a of
The return force of the operating rod 7 by the return spring 7a is received by the contact of the operating rod 7, so that the operating rod 7 is locked at the intermediate position c. Incidentally, the cam groove 13 is provided with a step in front of each groove position to prevent the engager 15 from moving backward, as shown in the fourth figure. For example, the groove depth from the plate surface 14a of the guide member 14 in d is 4 mm, the groove depth at groove positions b and groove position c is 3 mm, and the groove depth at the top of the step in front of groove position b is 1.6 mm. The groove depth at the top of the step before position c was 2 mm, and the groove depth at the top of the step before groove position a was 3 mm.

Here, when the operating rod 7 is pressed from the starting end position A, the position is regulated at the end position B by pushing the electromagnetic safety valve 2, which is the operated member, so that no unreasonable force is applied to the engager 15, but the intermediate position is When pressing from position c, the unlocking position D is set before the terminal position B, so position regulation by the operated member cannot be achieved, and when pressing strongly, the engager 15
is the groove wall 13 at the groove position d corresponding to the unlocked position D.
b and tries to rise from the cam groove 13.

In order to prevent the engaging element 15 from coming off from the cam groove 13 due to this floating, the above-mentioned patent application
In No. 58-227828, the attachment plate 17 of the leaf spring 16 that urges the engagement element 15 is used as a stopper, and when the engagement element 15 comes into contact with the attachment plate 17, its insertion end 15a becomes a guide member. 14 board surface 1
In this case, the mounting plate 17 is fixed to the fixed frame 6 in such a posture as to cross over the guide member 14, and the swinging of the engaging member 15 is prevented. Since the engaging element 15 is opposed to the engaging element 15 over the entire range of angles, the engaging element 15 is
The mounting plate 17 is configured such that the mounting plate 17 can move from groove position a to groove position b by climbing over the shallowest groove part of the cam groove 13, that is, the 1.6 mm groove depth part at the top of the step in front of groove position b. It is necessary to arrange the engaging element 15 at a height such that the engaging element 15 does not come into contact with the shallowest groove part even when the engaging element 15 rides on the shallowest groove part. Even if it floats from a depth of 4 mm to a depth of 1.6 mm at position d, this cannot be controlled, and when the operating rod 7 is pressed more forcefully from intermediate position C, the tip of the engaging element 15 bends and separates from the cam groove 13. May leave.

On the other hand, according to the present invention, only when the engaging element 15 is located at the oscillation angle position where it engages with the groove position d corresponding to the unlocking position D on the opposite side of the insertion direction of the engaging element 15. A stopper 18 is provided to suppress the floating of the engaging element 15 as much as possible in a positional relationship opposite to the engaging element 15. In the above embodiment, the mounting plate 17 is provided with a stopper 18 as shown in FIGS. As clearly shown in the figure, the stopper 18 is constructed by protruding a cut and raised tongue extending downward in this positional relationship.

Here, "suppressing the floating of the engaging element 15 as much as possible" means suppressing the floating to a minimum within a range that does not impede the movement of the engaging element 15 along the cam groove 13, and the above-mentioned implementation In the case of the example, engager 1
5, when moving from groove position d to groove position a, the engaging element 15 swings sideways according to the bent groove shape connecting the groove positions d and a, and then the above-mentioned neck Since the engagement member 15 passes through a groove depth portion of approximately 3 mm near the groove position a at the same angle position as the swing angle position, it is possible to prevent the insertion end 15a of the engaging element 15 from floating to a position shallower than 3 mm depth. The stopper 18 is configured as follows.

Since the stopper 18 is located at a position outside of the swing angle range when the engager 15 moves from groove position a to groove position b to groove position c, the engager 15 moves from groove position b to groove position b. The part with a groove depth of 1.6mm in the front,
The groove depth portion of 2 mm in front of the groove position c can be reliably climbed over without being restricted by the stopper 18. Accordingly, the groove can be crossed without hindering the movement of the engaging element 15. At position d, the insertion end 15a of the engaging element 15 can be prevented from floating to a depth shallower than 3 mm. The bending moment acting through the cam groove 13 is reduced, and even if the operating rod 7 is pressed from the intermediate position C with a stronger pressing force, the engaging element 15 will not separate from the cam groove 13.

In the above embodiment, the stopper 18 is attached to the mounting plate 17.
However, as shown in FIG. 8, the stopper 18 may be constructed as a separate plate from the mounting plate 17 and attached to the fixed frame 6, or as shown in FIG. The stopper 18 may be attached to cover the groove position d.

Incidentally, according to the embodiment shown in FIG. 9, the engaging element 15
Only when the stopper 1 is engaged with the groove position d
8 faces the engaging element 15, the engaging element 15 does not float at all at the groove position d without considering the movement over the 3 mm groove depth from the groove position d to the groove position a. It is also possible to configure the stopper 18 in this manner.

As described above, according to the present invention, the stopper that prevents the engaging element from floating is engaged only when the engaging element is at the oscillation angle position where it engages the groove position corresponding to the unlocking position of the operating rod. It is provided in a positional relationship that opposes the engaging element, and allows the engaging element to float at the groove position without hindering the movement of the engaging element to get over the shallow groove part at positions other than the angular position. The engagement element can be regulated to a position deeper than the groove depth of the cam groove, and even if the operating rod is pressed strongly from the intermediate position to the unlocked position, the engaging element will not come out of the cam groove, making the position regulation at the unlocked position more reliable. have an effect.

[Brief explanation of drawings]

FIG. 1 is a cutaway side view of one row of an ignition operating device to which the present invention is applied, FIG. 2 is a perspective view of the main parts thereof,
Fig. 3 is a plan view of the guide member, Fig. 4 is an expanded cross-sectional view of the cam groove, Fig. 5 is a plan view of the main part when the operating rod is operated to the unlocked position, and Fig. 6 is a plan view of the main part of the cam groove. FIG. 7 is a diagram illustrating the operation of the operating lever, and FIGS. 8 and 9 are plan views of main parts corresponding to FIG. 5 of other embodiments. 6... Fixed frame, 7... Operating rod, 7a... Return spring, 10... Push button mechanism, 13... Cam groove, 14... Guide member, 15... Engagement element, 1
6... Leaf spring (spring member), 18... Stopper.

Claims (1)

[Claims] 1. An operating rod is provided on the fixed frame so that it can be pressed freely against a return spring, and the returning operation of the operating rod from the pressing end position to the starting end position is stopped at an intermediate position,
A push operation device with a push-pull mechanism that releases the lock at the intermediate position by pressing from the intermediate position to a lock release position before the terminal position and returns the operating rod to the starting position. And,
one of the fixed frame and the operating rod, from a groove position corresponding to the starting end position to the end position, the intermediate position, and the unlocking position, each corresponding to the starting end position through groove positions corresponding to each of the positions; The push mechanism includes a guide member having a deformed heart-shaped cam groove that returns to the groove position, and a swingable engager that is elastically inserted into the cam groove by a spring member. , on the opposite side of the insertion direction of the engager, in a positional relationship such that it faces the engager only when the engager is in an oscillation angle position where it engages the groove position corresponding to the unlocked position. A press operation device characterized in that a stopper is provided to suppress floating of the engagement element as much as possible.