JP3409022B2 - Manhole wall fastener - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener for mutually fastening a plurality of divided manhole walls. 2. Description of the Related Art Conventionally, as a fastening device for mutually fastening a plurality of divided manhole walls, a fastening plate for mutually fastening each manhole divided wall, and a fastening plate embedded in each manhole divided wall. A structure composed of a nut and the fastening plate fixing member with a bolt screwed to the nut is known as disclosed in, for example, Japanese Utility Model Registration No. 3019953. [0003] In the above-mentioned known apparatus, it is troublesome to perform a positioning operation for aligning a bolt hole formed in a fastening plate with a nut embedded in a manhole wall. At the same time, since the width of the fastening plate when viewed from the front is uniform and there is no place where the strength against the shearing force is weak, there is a possibility that the manhole itself may be damaged before the fastening plate is damaged when the manhole sways due to an earthquake or the like. . [0004] The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide strict accuracy in the interval between the holes of the divided manhole wall. An object of the present invention is to provide a manhole wall fastener which can be easily fastened without being required, can be sufficiently fastened over a long period of time, and prevents damage to the manhole in an earthquake or the like. [0005] In order to achieve the above-mentioned object, a manhole wall fastener according to the present invention is formed by integrally forming a fastening plate of reinforced resin, and has a bolt penetration length near both ends. A hole is formed, and the width of the fastening plate in a front view is formed to be narrow at the center , and cut in response to a shear force applied to the fastening plate.
It is characterized in that it has possible. 1 to 3 relate to an embodiment of the present invention, and FIG. 1 is a sectional view showing an example of a fastening state by a manhole wall fastener according to the present invention. FIG. 2 is a front view of the fastening plate, and FIG. 3 is a side view of FIG. In FIG. 1, reference numeral 1 denotes a manhole wall constituting a manhole. The manhole wall 1 has a manhole inclined wall having an opening on its upper surface covered with a manhole cover. There are a manhole pipe mounting wall body with a cylindrical manhole straight wall, a sewer pipe, etc., and a manhole bottom plate, etc., which are made of concrete. As shown in FIG. 1, each of the manhole walls 1 and 1 'is fastened and joined to each other by a fastening plate 2 to form a manhole, and the manhole is appropriately drilled in the ground. It is designed to be installed in a hole. The fastening plate 2 is integrally formed of a reinforced resin such as a fiber reinforced plastic. And
Slots 3 and 3 for bolt penetration are provided near both side ends of the fastening plate 2. Further, the fastening plate is formed such that the width of the fastening plate in a front view becomes the narrow width 4 at the center. Reference numeral 5 denotes a fastening embedded nut embedded in the manhole wall 1, and a screw 7 for screwing a bolt 6 is formed in the axial direction of the nut 5. I have. The nut 5 and the bolt 6 are also formed of a reinforced resin such as a fiber reinforced plastic. When the manhole wall members 1 and 1 'are fastened by using the manhole wall member fastener having the above-described configuration, the concrete in the concrete of the wall members 1 and 1' is used. A fastening embedding nut 5 is previously embedded in a predetermined position, and another manhole wall 1 ′ is placed above the manhole wall 1. Next, the position of the fastening plate 2 is determined by aligning the bolt-elongated long hole 3 on one side of the flat fastening plate 2 with the nut 5 embedded in the manhole wall 1 ′, and the bolt penetration of the fastening plate 2 is performed. A bolt 6 is screwed into the screw 7 of the nut 5 from the long hole 3 for use, and the fastening plate 2 is fixed to the manhole wall 1 '. In this state, the nut 5 embedded in the lower manhole wall 1 is substantially within the range of the elongated hole 3 formed on the other side of the fastening plate 2. Therefore, the bolt 6 is inserted from the long hole 3 toward the nut 5 embedded in the wall 1 and the bolt 6 is screwed to the nut 5 in the wall 1 so that the manhole wall 1, 1 ′ is securely and easily fastened by the fastening plate 2. Since the positions of the bolts with respect to the manhole walls 1, 1 'can be easily selected by the slots 3, 3, each nut 5 with respect to the manhole walls 1, 1'.
The embedding position does not need to be particularly precise. [0012] Such fastening of the manhole walls is performed at a plurality of locations on the outer circumferential surface of the manhole walls 1 and 1 'to securely fasten the manhole walls 1 and 1'. . By repeating this operation, the manhole walls are sequentially stacked and fastened by the fastening plate 2 to form a manhole. Since the fastening plate 2 is integrally formed of a reinforced resin such as a fiber reinforced plastic, for example, the molding is easy and hardly corrodes, so that the fastening can be maintained for a long period of time. When the completed manhole is shaken due to an earthquake or the like, the width of the fastening plate 2 is formed to be a narrow width 4 at the center in a front view, so that the manhole wall is formed. In the vicinity of the fastening plate 2 of the bodies 1, 1 ',..., The narrow width 4 of the fastening plate 2 is cut first before damage such as cracks occurs, and the manhole wall bodies 1, 1',. Can be prevented beforehand. According to the present invention, the fastening plate is integrally formed of a reinforced resin, and a long hole for bolt penetration is provided near both side ends, and the width of the fastening plate in the front view is made narrow at the center. Then tighten
Since it is possible to cut against shearing force applied to the tie plate, it is easy to fasten without requiring strict accuracy in the interval between the holes in the divided manhole wall, and it is possible to achieve sufficient fastening for a long time Yes, it is a manhole wall fastener that can prevent damage to the manhole wall by cutting the narrow part of the fastening plate first even in the event of a lateral shake such as an earthquake .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an example of a fastening state using a manhole wall fastener according to the present invention. FIG. 2 is a front view of a fastening plate. FIG. 3 is a side view of FIG. 2; [Description of Signs] 1 Manhole wall 2 Fastening plate 3 Slotted hole for bolt penetration 4 Narrow width of fastening plate

Claims (1)

(57) [Claims 1] In a fastener for mutually fastening a plurality of divided manhole walls, a fastening plate is formed integrally with a reinforced resin, and bolts are penetrated near both side ends. A long hole is provided, and the width of the fastening plate in a front view is formed to be narrow at a center portion to fasten the fastening plate.
A manhole wall fastener characterized in that it can be cut against shearing force applied to a tie .