JPS6324351Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of an ignition safety device that releases pressure when a combustion appliance is ignited.

A conventional ignition safety device of this type will be explained with reference to FIGS. 1 and 2. The ignition safety device includes a pressure relief tube 1 arranged horizontally, an opening/closing lid 2 that opens and closes this opening, and an arm 4 connecting the opening/closing lid 2 and a shaft 3.
and a bearing 5 provided at the top of the pressure relief cylinder 1. Reference numeral 6 denotes an exhaust stack, which is provided near the combustion appliance.

In this structure, as shown in FIG. 3, if an installation error a occurs between the opening and closing lid 2 and the arm 4 with respect to the center g of the opening and closing lid 2, the installation error a and the opening and closing lid 2 are Due to its own weight, a moment m acts on the shaft 3, which impedes smooth operation of the opening/closing lid 2. moreover,
Since the center position g of the opening/closing lid 2 is offset from the center f of the pressure relief cylinder 1 by the installation error a, if the installation error a is large, the opening/closing lid 2 may not completely cover the pressure relief cylinder 1. sell.

Therefore, during manufacturing, dimensional control is carried out to minimize the installation error a, and after manufacturing, the inclinations of the shaft 3 and bearing 5 are adjusted so that the opening/closing cylinder 2 operates smoothly. The disadvantage was that productivity was low.

Furthermore, since the movable part is composed of three parts: the arm 4, the shaft 3, and the bearing 5, there is also a drawback that the number of parts is large.

The present invention provides a highly productive structure for an ignition safety device that reduces dimensional control during manufacturing and adjustment work after manufacturing.

In the present invention, positioning holes are provided on the upper surface of the pressure relief cylinder on the left and right sides of the opening of the pressure relief cylinder, and a lid for opening and closing the opening is fixed to one end of the arm, and an insertion piece is attached to the other end of the arm. The insertion piece is inserted into the positioning hole from the outside of the pressure relief tube.

An embodiment of the present invention will be explained with reference to FIGS. 4, 5, and 6. 7 is a cylindrical pressure relief tube, which is arranged horizontally. Reference numerals 8 and 9 indicate positioning holes for the opening/closing lid 2, which are provided at the upper part of the pressure relief cylinder 7 and centered at the center in the left-right direction. Reference numeral 10 denotes an arm, one end of which is fixed to the opening/closing lid 2, and the other end of which is inserted into the positioning holes 8 and 9.
1 and 12 are provided. Between insertion pieces 11 and 12 1
3 is a linear notch on the top surface of the pressure relief tube 7 so that it touches at one point. Further, the tips 11a and 12a of the insertion pieces 11 and 12 are bent in the direction opposite to the opening/closing lid 2.

Insert piece 11 of arm 10 with opening/closing lid 2 fixed,
Positioning holes 8, 9 from the tips 11a, 12a of 12
Insert and assemble.

The opening/closing lid 2 performs a swinging motion using the contact point between the outer periphery of the pressure relief tube 7 and the end surface 13 of the arm 10 as a fulcrum.

As shown in FIG.
When a mounting error a occurs with respect to the center g, the outer circumference of the pressure relief tube 7 and the arm end surface 1 are
3 moves, and the contact point and the center g of the opening/closing lid 2 move.
is balanced at the point where it is vertically located. Therefore, the opening/closing lid 2 can always operate smoothly.

Furthermore, the deviation c between the center f of the pressure relief cylinder 7 and the center g of the opening/closing lid 2 is smaller than the installation error a, so that the opening/closing lid 2 is moved to the pressure relief cylinder 7 due to the installation error a.
The risk of complete blockage is reduced.

Further, according to this embodiment, since the movable part is composed of only the arm 10, there is an effect that the number of parts is reduced.

As explained above, the present invention is based on dimensional control during production,
Since adjustment work after manufacturing can be reduced, productivity can be increased.

[Brief explanation of drawings]

Fig. 1 is a side view of a conventional ignition safety device, Fig. 2 is a front view thereof, Fig. 3 is an explanatory diagram of installation errors of the conventional ignition safety device, and Fig. 4 is an illustration of an embodiment of the present invention. A side view of the ignition safety device, Figure 5 is A in Figure 4.
-A sectional view, FIG. 6 is an enlarged sectional view of the main part of FIG. 4, and FIG. 7 is an explanatory diagram of installation error of the ignition safety device of the present invention. 2... Opening/closing lid, 7... Pressure relief tube, 8, 9...
Positioning hole, 10... Arm, 11, 12... Insertion piece, 13... End surface.

Claims (1)

[Scope of utility model registration request] The upper surface of a cylindrical pressure relief cylinder arranged in the horizontal direction, with positioning holes provided on the left and right sides around the center in the left and right direction of the opening of the pressure relief cylinder, and an arm with a lid fixed to one end for opening and closing the opening. A linear end face and an insertion piece protruding from both sides thereof are formed at the end, and the insertion piece is inserted into both the positioning holes to ensure that the end face of the arm and the pressure relief tube touch at one point between the two positioning holes. Features a ignition safety device.