JPH0145213Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improved structure for a ground wire lead-in outlet that is buried in a concrete layer during the manufacture of utility poles.

[Prior Art] This type of ground wire lead-in outlet, which has been known in the past, has a flange piece 2 around one end edge of a cylindrical body that is installed embedded in a utility pole, as shown in FIG. 6, for example.
Vertical grooves 5, 4'' are provided on the left and right side walls 3, 3' of the cylindrical body 1 at intervals to support reinforcement reinforcing bars placed in the concrete. 5'.

[Problems to be solved by the invention] In the conventional ground wire lead-in outlet A' formed in this way, a recess 6 is formed between the flange piece 2 and the vertical ridge 4 near the flange piece 2, making it difficult to manufacture utility poles. Sometimes, when trying to hold the reinforcing bar B placed in the molding frame between the left and right vertical grooves 5, 5, for example, even if it is correctly held in the vertical groove 5 on one side wall 3, it will not work on the other side wall 3'. The reinforcing bar B may slip over the vertical ridge 4 and into the recess 6. It is extremely difficult to determine that this condition is abnormal, so if the molding frame is attached as is and concrete is poured and molded, both end surfaces of the cylinder 1 will face both the inner and outer surfaces of the concrete C as shown in Figure 8. Otherwise, the entire ground wire lead-in outlet A' was buried in the concrete C, which not only made it impossible to connect and pull out the ground wire, but also caused a serious defect that caused the pole to be rejected.

[Means for solving the problem] A baffle plate is provided protrudingly between the flange piece and the vertical ridge adjacent to the flange piece on the left and right side walls of the cylindrical body, and the baffle plate connects the flange piece between the vertical ridges. Close the recess that exists in the

[Function] The concave portions of the flanges and vertical ridges are closed with a baffle plate to prevent the reinforcing bars from slipping into the concave portions, and the reinforcing bars are correctly held in the vertical grooves by the left and right side walls to maintain their normal position relative to the concrete layer. be buried in

[Embodiment] In Fig. 1, reference numeral 1 denotes a cylindrical body to be installed embedded in a utility pole, and the cylindrical body 1 is formed into a vertically elongated ellipse with a length approximately equal to the concrete wall thickness of the utility pole. The cylindrical body 1 is provided with a collar piece 2 around the outer periphery at one end in the longitudinal direction, and vertical ridges 4, 4', 4'' having a required thickness at regular intervals on both left and right side walls 3, 3'. By protruding from each other, vertical grooves 5, 5' are formed between the vertical ridges 4, 4', 4' and 4'' to hold reinforcing bars buried in the utility pole. In this way, the cylindrical body 1 with the vertical ridges 4, 4', 4'' provided on the left and right side walls 3, 3' has an area between the flange piece 2 and the vertical ridge 4 adjacent to the flange piece 2. Recess 6
exists.

The purpose of the present invention is to close the recess 6 by protruding the baffle plate 7 into the recess 6 to prevent the reinforcing steel from slipping into it. Baffle plates 7, 7 reaching the flange piece 2 are horizontally positioned and protruded from both upper and lower ends of the vertical ridge 4 adjacent to the ridge 2. Note that each of these baffle plates 7 is provided at a height flush with a line connecting the peripheral edge of the collar piece 2 and the top of the vertical ridge 4.

In this way, the ground wire outlet of the present invention in which the concave portion 6 between the collar piece 2 and the vertical ridge 4 is closed by the baffle plate 7 on the left and right side walls 3, 3' of the cylinder 1 can be used as shown in FIG. As shown in the figure, in order to be able to correctly fit and hold the reinforcing bars B, B installed in the concrete in the vertical grooves 5, 5 without having to slide them into the recesses 6, 6, grounding is installed at the upper and lower positions of the utility pole D. It is possible to reliably form the insertion hole F through which the wire E is drawn in and the ground wire E which has been drawn in is drawn out.

In addition, each baffle plate 7, together with each vertical ridge 4, 4', 4'', has the function of enveloping the concrete well and also functions to increase the strength of the cylindrical body 1.

[Effects of the invention] As described above, the ground wire outlet for concrete utility poles of the present invention has a baffle plate in the recess that exists between the flange piece and the vertical ridges adjacent to the flange piece on both left and right side walls of the cylindrical body. By providing this, the reinforcing bars can be prevented from slipping into the recesses during use, and the reinforcing bars can be properly fitted and clamped into the vertical grooves on both left and right walls. It is possible to reliably form an insertion hole for pulling out, and also to eliminate the occurrence of defective utility poles.

[Brief explanation of drawings]

The figures relate to the present invention: Fig. 1 is a perspective view, Fig. 2 is a side view, Fig. 3 is a plan view, Fig. 4 is a cross-sectional view of the main parts showing the state of use, and Fig. 5 is a telephone pole. 6 is a perspective view showing a conventional example, FIG. 7 is a sectional view of the same as above, and FIG. 8 is a cross-sectional view of the main part showing a defective state of the same. 1... Cylindrical body, 2... Flange piece, 3, 3'... Left and right side walls, 4, 4', 4''... Vertical ridge, 5, 5'... Vertical groove,
6... recess, 7, 7... baffle plate, A, A'... ground wire outlet, B... reinforcing bar, C... concrete.

Claims (1)

[Scope of utility model registration request] A collar piece is provided around one edge of the cylinder having a length approximately equal to the thickness of the concrete layer, and a plurality of vertical ridges are provided on the left and right side walls of the cylinder to sandwich the reinforcing bars buried in the concrete layer. Concrete characterized by having a baffle plate protruding from a recess formed between a collar piece and a vertical ridge near the collar piece on both left and right side walls of a cylindrical body at a ground wire lead-in outlet having a vertical groove. Ground wire outlet for utility poles.