JP3439832B2 - Fixing structure of iron lid receiving frame and lower basin - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a receiving frame for an iron lid to a lower box, and more particularly, to soil and sand in an embedded nut embedded in the lower box. The present invention relates to a fixing structure between an iron cover receiving frame and a lower sill, which can surely prevent intrusion of dust such as the like and does not require preparing fixing bolts having different lengths. 2. Description of the Related Art A conventional structure for fixing an iron cover receiving frame and a lower box will be described with reference to the drawings. FIG. 4 is an assembled perspective view of an iron cover receiving frame and a lower pit, and FIG. 5 is a cross-sectional view showing a conventional fixing structure of the iron lid receiving frame and the lower pit. [0003] In Figs. 4 and 5, reference numeral 1 denotes a resin concrete lower basin buried in the ground for accommodating an air valve and the like, and is divided into three blocks in this example. Reference numeral 2 denotes an iron cover receiving frame that is placed and fixed on the upper outer edge of the upper block of the lower box 1, and has a U-shaped opening 2A with the lower box 1 for a fixing bolt to be described later. . 3
Is located on the upper outer edge of the lower basin 1 where the receiving frame 2 is placed and fixed,
It is an embedded nut that is vertically embedded with its upper end exposed. An iron plate 4 is fixed to a lower surface of the embedding nut 3. The iron plate 4 functions as a stopper for the fixing bolt and when the embedding nut 3 is embedded in the lower basin 1,
It has a function of preventing concrete from entering the embedded nut 3. Reference numeral 5 denotes a fixing bolt that is screwed into the embedding nut 3 through the opening 2A of the receiving frame 2 placed on the lower tub 1, reference numeral 6 denotes a washer, and reference numeral 7 denotes a fastening nut. According to the above-mentioned conventional fixing structure, the iron cover receiving frame 2 is placed on the lower tub 1, and the fixing bolt 5 is screwed into the embedded nut 3 through the opening 2A of the receiving frame 2 and screwed into the fixing bolt 5. When the nut 7 is tightened via the washer 6, the iron cover receiving frame 2 is fixed on the lower basin 1. [0005] However, the above-mentioned conventional fixing structure has the following problems. Since the lower end of the screw hole of the embedded nut 3 is closed by the iron plate 4, it is difficult to remove dust such as soil and sand which have entered the embedded nut 3. If dust enters the embedded nut 3, the fixing bolt 5 cannot be screwed into the embedded nut 3 and the receiving frame 2 cannot be fixed. Since only the upper end of the embedding nut 3 is open, the height of the receiving frame 2 has to be adjusted by using fixing bolts 5 having different lengths. This is because the length of the fixing bolt 5 protruding from the upper end of the embedded nut 3 cannot be made too long from the surface of the peripheral frame of the receiving frame 2 such as pavement. The height of the receiving frame 2 is adjusted by interposing a spacer between the lower tub 1 and the receiving frame 2. Accordingly, an object of the present invention is to reliably prevent dust such as soil and sand from entering a buried nut embedded in a lower basin, and to provide a fixing bolt having a different length. It is an object of the present invention to provide a fixing structure between an iron cover receiving frame and a lower measure, which does not require a book. According to the present invention, there is provided a lower cell for burying an air valve or the like buried in the ground, and mounted and fixed on an upper outer edge of the lower cell. In the fixing structure with the iron lid receiving frame in which the fixing bolt opening is formed in the flange,
An embedding nut that is vertically embedded with both end surfaces exposed at the upper outer edge of the lower basin, and the embedded nut and the screw are passed through the opening of the receiving frame placed on the upper outer edge of the lower basin. A long fixing bolt that fits, an upper nut that is screwed to the long fixing bolt that protrudes above the receiving frame from an upper end surface of the embedding nut, and protrudes below the lower box from a lower end surface of the embedding nut. It consists of a lower nut that is screwed to the elongated locking bolt, of the embedded nut
A flange is formed on the upper and lower outer peripheral parts, and the female screw is
The inner diameter of the lower half is equal to the inner diameter of the upper half.
It is characterized by being formed wider . [0009] Since both end surfaces of the embedding nut are exposed,
Since the screw hole of the embedded nut is penetrated, dust such as soil and sand which has entered the embedded nut completely escapes from the embedded nut. Therefore, no dust accumulates in the embedded nut. The length of protrusion of the long fixing bolt from the upper and lower end surfaces of the embedding nut can be adjusted freely, so that when the height of the receiving frame is adjusted, it does not protrude more than necessary from the upper end surface of the embedding nut. Therefore, it is not necessary to prepare many long fixing bolts having different lengths. By forming the flanges on the upper and lower outer peripheral portions of the embedded nut, the retaining effect of the embedded nut is enhanced. If the female screw of the embedded nut is formed only in the upper half and the inner diameter of the lower half is wider than the inner diameter of the upper half, dust adhering to the inner surface of the embedded nut can be easily removed. Next, an embodiment of a fixing structure of a receiving frame for an iron lid and a lower box according to the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing one embodiment of a fixing structure of an iron cover receiving frame and a lower box according to the present invention, and FIG. 2 is a fixing structure of an iron cover receiving frame and a lower box of the present invention. FIG. 3 is a perspective view showing the embedded nut in the fixing structure of the receiving frame for the iron lid and the lower box according to the present invention. In FIG. 1, 8 is buried underground.
This is a resin concrete lower basin made of a plurality of stacked blocks for accommodating an air valve and the like. 9
Is a receiving frame for an iron lid placed and fixed on the upper outer edge of the upper block of the lower box 8, and has a U-shaped opening 9A with the lower box 8 for a long fixing bolt to be described later. I have. 10 is
An embedding nut that is vertically embedded with an upper end surface exposed at an upper outer edge of the lower measure 8 on which the receiving frame 9 is placed and fixed. Reference numeral 11 denotes a long fixing bolt that is screwed into the embedding nut 10 through the opening 9A of the receiving frame 9 placed on the upper outer edge of the lower basin 8. Reference numeral 12 denotes an upper nut that is screwed into a long fixing bolt 11 protruding above the receiving frame 9 from an upper end surface of the embedding nut 10. Reference numeral 13 denotes a lower nut which is screwed into a long fixing bolt projecting from the lower end surface of the embedding nut 10 to below the lower tub 8. 14 and 15 are washers, respectively. If the flange 10A is formed on the upper and lower outer peripheral portions of the embedded nut 10, the retaining effect of the embedded nut 10 is enhanced. If the female screw of the embedding nut 10 is formed only in the upper half and the inner diameter of the lower half is made wider than the inner diameter of the upper half, dust adhering to the inner surface of the embedding nut can be easily removed. In order to fix the iron cover receiving frame and the lower tub by the fixing structure of the present invention configured as described above, the iron lid receiving frame 9 is placed on the lower tub 8 and the long fixing bolts are attached. 11
Is screwed into the embedding nut 10 through the opening 9 </ b> A of the receiving frame 9. At this time, the screw-in depth of the long fixing bolt 11 is set so that the upper portion thereof has a length that does not hinder the surface of the peripheral frame of the receiving frame 9 such as pavement. Next, washer 1
The long fixing bolt 11 is fixed by tightening the lower nut 13 with the intermediate member 5 interposed therebetween. Next, the washer 14
And the upper nut 12 is tightened. As a result, the iron cover receiving frame 9 is fixed on the lower square 8. As described above, according to the present invention, the following effects can be obtained. Since the screw hole of the embedded nut is penetrated, dust such as soil and sand that has entered the embedded nut easily escapes outside the embedded nut. Therefore, no dust accumulates in the embedded nut. The length of protrusion of the long fixing bolt from the upper and lower end surfaces of the embedding nut can be adjusted freely, so that when adjusting the height of the receiving frame, it does not protrude more than necessary from the upper end surface of the embedding nut. Therefore, it is not necessary to prepare many long fixing bolts having different lengths. By forming the flanges on the upper and lower outer peripheral portions of the embedded nut, the retaining effect of the embedded nut is enhanced. If the female screw of the embedded nut is formed only in the upper half and the inner diameter of the lower half is wider than the inner diameter of the upper half, dust adhering to the inner surface of the embedded nut can be easily removed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing one embodiment of a fixing structure of a receiving frame for an iron lid and a lower box according to the present invention. FIG. 2 is a cross-sectional view showing an embedding nut in the fixing structure of the iron cover receiving frame and the lower stake according to the present invention. FIG. 3 is a perspective view showing an embedding nut in the fixing structure of the iron cover receiving frame and the lower stake according to the present invention. FIG. 4 is an assembled perspective view of an iron cover receiving frame and a lower yard. FIG. 5 is a cross-sectional view showing a conventional fixing structure of a receiving frame for an iron lid and a lower box. [Description of Signs] 1: Lower Masu, 2: Receiving Frame for Iron Lid, 2A: Bolt Opening, 3: Embedded Nut, 4: Iron Plate, 5: Fixing Bolt, 6: Washer, 7: Nut, 8: Lower Masu, 9: receiving frame, 9A: opening for bolt, 10: embedded nut, 11: long fixing bolt, 12: upper nut, 13: lower nut, 14: washer, 15: washer.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Akimasa Sahara 4-46-9 Maekawa, Kawaguchi-shi, Saitama Japan Inside Ryokusui Koki Co., Ltd. (56) Reference Real-life 1982-197540 (JP, U) Sho-63-126453 (JP, U) JP-A 3-108037 (JP, U) JP-A 5-67645 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 29 / 12

Claims (1)

(57) [Claims 1] A lower tub buried underground for accommodating an air valve and the like, and a flange mounted and fixed on an upper outer edge of the lower tub. In the fixing structure with the iron cover receiving frame in which the fixing bolt opening is formed, on the upper outer edge of the lower basin, embedded nuts vertically exposed by exposing both end faces, and on the upper outer rim of the lower basin. A long fixing bolt screwed into the embedding nut through the opening of the placed receiving frame, and an upper portion screwed into the long fixing bolt protruding above the receiving frame from an upper end surface of the embedding nut. A nut, and a lower nut screwed into the long fixing bolt protruding below the lower basin from a lower end surface of the embedded nut.
A flange is formed on the upper and lower outer peripheral parts, and the female screw is
The inner diameter of the lower half is equal to the inner diameter of the upper half.
A fixing structure of a receiving frame for an iron lid and a lower basin, characterized by being formed wider .