JP3388407B2 - Closed plate structure for iron lid - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron cover made of cast iron or the like, which always closes an opening of a U-shaped knurled notch for opening the cover. The present invention relates to a structure in which a space is easily created by inserting a cover-opening tool when performing a cover-opening operation to prevent sand or the like from dropping, and the closing plate structure is incorporated in an iron cover body. 2. Description of the Related Art Conventionally, a lid and a closing plate structure are locked by separate pins, or the pin is formed integrally with the closing plate structure, and the pin portion is formed on a main portion of the lid. There is a configuration in which the groove is loosely fitted and a bolt or other component is used to form a retaining structure. [0003] The main point of the present invention is to provide a structure in which a closing plate structure is locked to a lid, and both parts formed as castings are subjected to any machining at the part. It is a technical problem to be solved that the present invention can be implemented without performing the above and without requiring a separate component. [0004] A technical means for solving the above-mentioned problem is to form a U-shaped knurled notch as viewed from above on a peripheral portion of an iron lid made of cast iron or the like. A projection having a vertical side wall extending along the U-shaped parallel portion and toward the center of the lid on the back surface of the cutout portion, and having both ends symmetrically positioned on the opposite surface of the side wall parallel portion. Is closed to form a groove parallel to the surface of the lid. On the other hand, a closing portion that covers the U-shaped notch and that is loosely fitted, and a weight that maintains the closed state when the lid is assembled and closed are integrated at both ends. Formed at a substantially right angle from the middle thereof to form a closing plate structure having axes symmetrically on both ends of the protrusion, and a closing plate structure for the opening of the vertical side wall. When the shaft is inserted in parallel and twisted at a right angle, the shaft is loosely fitted in the groove in the side wall, and the closing plate structure Is locked to an iron lid. [0005] According to the closing plate structure for an iron lid having the above structure, when the closing plate structure is brought into contact with the side wall parallel portion formed on the back surface of the lid and at right angles to the parallel portion, the closing plate is closed. The axis of the plate structure is immersed in the parallel portion as it is, and since the axis is located at the tip end where a projection is formed at a substantially right angle from the closure plate structure, the closure plate structure is free to pivot around the projection. Therefore, when the shaft is twisted at a right angle, the shaft loosely fits into the groove in the side wall, and the closing plate structure is locked to the iron lid cover. At this time, the closing portion of the closing plate structure is It is loosely fitted into the U-shaped knurled notch, and when the lid is closed in this state, the integral weight functions to maintain the closed state. The grooves on the side walls are not symmetrical, the position of the closing portion on the lid center side is the same, one of the groove lengths is the original length, and the other is slightly larger than the corresponding shaft dimension. The play after assembly can be restrained by vertically driving a pin or the like into the play. An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, 1 is an iron lid main body, 2 is a lid body, 3 is a U-shaped notching portion for U-shape viewed from above, 4 is a projection having a vertical side wall 5, and 6 is a facing surface of the side wall 5. A groove parallel to the surface of the lid with both ends closed is formed, and a closing portion 8 and a weight 9 are formed integrally with the U-shaped notch 3 so as to cover the U-shaped cutout portion 3, and a protrusion is formed at a substantially right angle from the middle thereof. 10, a closing plate structure having shafts 11 symmetrically on both front ends of the protruding portion 10;
6 _a, 16 _b are different grooves of lengths, 17 represents the pin, such spring pin to be implanted, At a 3, the closing plate structure 7 against the main part of the lid 2 by a broken line state contact, which completes the assembly by twisting it at right angles to the direction of the arrow, after twisting perpendicular to direction of the arrow at a 4, advance vertically play component of the long groove 16 _a side On the hole, pin 1
7 is input to complete the assembly. As described above, according to the present invention, since the mounting portion of the closing plate structure formed on the iron lid is formed by integral casting, no machining is performed on the portion. Without this, and because the closing plate structure itself is cast as an integral structure, it is structurally robust, does not require separate parts for assembly, and achieves cost reduction. Even if pins are additionally used, the material cost is low, and the processing is simple by vertical drilling on the surface, and its usefulness is high.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front sectional view of a main part of an iron lid incorporating a closing plate structure embodying the present invention; FIG. 2 is a perspective view of the closing plate structure of FIG. 1 FIG. FIG. 4 is a rear view showing a working state of assembling the closing plate structure to the portion. FIG. 4 is a rear view showing another embodiment different from FIG. 3 [Description of reference numerals] 1, iron cover main body 8, closing portion 2, cover 9 , Weight 3, notch for stiffening 10, protrusion 4, parallel part 11, shaft 5, side wall 16 _a , long groove 6, groove 16 _b , short groove 7, protrusion 17, pin

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 29/14 F16J 13/16 E03B 9/10

Claims (1)

(57) [Claims 1] A U-shaped knurled notch as viewed from above is formed at the peripheral edge of an iron lid body made of cast iron or the like, and a U-shaped notch is formed on the back surface of the notch. A projection having a vertical side wall is formed along the parallel portion and extending toward the center of the lid, and a groove parallel to the surface of the lid is closed at a position symmetrical to an opposite surface of the parallel portion of the side wall. On the other hand, a closing portion for loosely covering the U-shaped cutout portion and a weight for maintaining the closed state at the time of assembling and closing the lid are integrally formed at both ends. A closing plate structure having a symmetrical axis on both sides of the tip of the protrusion, and inserting the closing plate structure axis in parallel with the opening of the vertical side wall; The screw is loosely fitted into the groove in the side wall when the screw is screwed into the slot, and the closing plate structure is locked to the iron lid. Closing plate structure for iron lid that.