JPS6329802Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a concrete pole erection device. This invention relates to an improvement in a concrete pole erection device that connects divided upper and lower utility poles by connecting metal fittings with bolts.

[Problems to be solved by conventional techniques and ideas] Conventionally, in this type of equipment, the utility pole was divided into upper and lower parts.
Attach the connecting fittings to each of these divided parts, and
Registered Utility Model No. 26282 describes a system in which the vertically divided utility poles are connected via both connecting fittings by joining the respective connecting fittings and fastening the peripheral parts with bolts and nuts. I am forced to do so. Accordingly, in the above-mentioned method described in the publication, bolt holes are aligned and drilled near the periphery of the connecting fittings of the respective divided parts of the utility pole divided into the upper and lower parts,
However, the above-mentioned bolt tightening parts of these upper and lower connection fittings are provided so as to protrude greatly from the sides of the upper and lower utility poles, so there is a possibility that they may get caught on foreign objects and destroy the joints. There is a feeling of sadness. Therefore, as is well known, in recent years prestressed concrete columns have been manufactured, and when manufacturing these prestressed concrete columns, they are attached to both ends of a reinforcing bar cage inserted into the formwork. A tensioning plate is connected to the end plate through bolts, and the tensioning plate is connected to a tensioning device and tensioned to tension the PC steel material between both end plates, and then concrete is poured into the formwork. However, a manufacturing method using centrifugal compaction is used.

Thus, a prestressing steel material was interposed between the end plates, and in order to tension the prestressing steel material, the end plate was coupled to a tensioning plate, and the tensioning plate was further coupled to a tensioning device. At this time, a bolt was inserted through the tension plate into the end plate, and then the bolt was tightened into a bolt tightening hole provided in the end plate to connect the two. After the tension plate is tensioned by the tensioning device and the prestressing steel material is tensioned, the concrete is centrifugally compacted as described above, but when this operation is completed, the tension plate is removed from the end plate. It will be done. Therefore, a bolt tightening hole for fastening to the tension plate remains open in the upper surface of the end plate. Therefore, there are technical problems that must be solved in order to connect the upper and lower bodies using the bolt tightening holes.

[Means for solving problems]

This idea was proposed in view of the above-mentioned problems, and a bottom plate with a larger diameter than this is integrally installed at the lower end of the concrete pole together with tensioned steel wire. The bottom plate of the concrete pole is placed on the end plate of the upper end of the prestressed concrete pile that has been sunk to a predetermined depth, and the end plate and the bottom plate are tightened with bolts to connect the concrete pole and the prestressed concrete pile. In the concrete pole erection device, the bolt insertion hole to be drilled in the bottom plate provided at the lower end of the concrete pole is connected to the prestressed concrete pile connected to the lower part of the concrete pole. A concrete pole erecting device is provided which is provided facing a bolt tightening hole provided in the end plate when the end plate is connected to the tensioning plate via bolts during centrifugal compaction. This is what we intend to provide.

[Effect]

In this invention, when the production of a prestressed concrete pile by centrifugal compaction is completed, the tension plate is removed from the end plate. In this case, the bolt tightening hole into which the tension plate is bolted remains open in the end plate. First, the prestressed concrete pile is sunk underground to a predetermined depth. Of course, the end plate at the upper end of the prestressed concrete pile is integrally disposed at the upper end. on the other hand,
A bottom plate having the same circumference as this end plate is integrally provided at the lower end of the concrete pole, and a bolt insertion hole is provided in this bottom plate at a position facing the bolt tightening hole of the end plate. Therefore, by placing the bottom plate on the lower end plate, aligning the bolt insertion holes of the bottom plate with the bolt tightening holes of the end plate, and connecting the concrete pole and prestressed concrete pile with bolts, both is firmly fastened. At this time, since the fastening part of the bolt exists on the upper surface within the range of the prestressed concrete pile diameter, there is no possibility that other objects will accidentally get caught and destroy the fastening part, and the end plate and the bottom plate are connected with the bolt. There is no need to provide a separate bolt tightening hole in the end plate for fastening, which is extremely economical.

〔Example〕

An embodiment of this invention will be described below with reference to the accompanying drawings. For convenience of explanation, conventionally known configurations will also be explained at the same time. In the figure, a bottom plate 2 having a larger diameter than the concrete pole 1 is integrally provided at the lower end of a concrete pole 1 by centrifugal compaction modeling. The bottom plate 2 is fitted with rivet heads provided at the ends of the PC steel wires 3, 3, . . . during centrifugal compaction. The bottom plate 2 also includes an end plate 5 at the upper end of the prestressed concrete pile 4.
Bolt insertion holes 7, 7, . . . are provided at the same pitch as the plurality of bolt tightening holes 6, 6, . Of course, the rivet heads of the PC steel wires 9, 9, . . . are engaged with the end plate 5 and are tensioned.

Therefore, in order to carry out the construction work, first, the prestressed concrete pile 4 is sunk to a predetermined depth, and then the lower end of the concrete pole 1 is placed on the upper surface of the end plate 5 at the upper end of the prestressed concrete pile 4. Further, the bolt insertion holes 7, 7... of the bottom plate 2 are aligned with the bolt tightening holes 6, 6... on the lower surface, and the bolts 8, 8... are inserted from above, respectively. By fastening the concrete pole 1 to the bolt tightening hole 6 provided in the lower end plate 5, the concrete pole 1 can be connected to the upper surface of the prestressed concrete pile 4 and erected integrally.

Since one embodiment of this invention has the configuration described above, the bottom plate 2 provided at the lower end of the concrete pole 1 is integrally formed with the concrete by locking the PC steel wires 3, 3... is superimposed on the upper surface of the end plate 5 at the upper end of the prestressed concrete pile 4, so that the bolt insertion holes 7, 7... of the bottom plate 2 are aligned with the bolt tightening holes 6, 6... of the end plate 5,
Since the bolts 8, 8, etc. are inserted into the matching holes 6, 7 from the upper surface, respectively, and the bolts are fastened, the construction work is extremely easy and reliable. , bolts 8, 6, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
Since only the insertion holes 7, 7... of 8... are drilled, the production of the concrete pole 1 is easy and inexpensive, and even after joining with the bolts 8, 8..., the tightening part does not move laterally. Since it does not protrude, there is no chance of the tightening part being accidentally destroyed, making it safer.

[Effect of idea]

As detailed in one embodiment mentioned above, this invention
When constructing a concrete pole, it is natural that it can be divided into upper and lower parts as in the past, but in particular the column body buried underground is a prestressed concrete pile that is formed by centrifugal compaction. and is provided on this end plate, and
Bolt insertion holes are provided in the bottom plate of the concrete pole at locations that match the bolt tightening holes when connecting with the tensioning plate used when tensioning the PC steel wire, so the upper concrete pile is attached to the lower prestressed concrete pile. There is no need to provide a special connecting plate for connection, and there is also no need to provide a special screw portion for bolt fastening on the end plate.

Moreover, since the bolt fastening part does not protrude laterally, it is safe because it will not be destroyed by foreign objects, and the construction work is easy and reliable, which also contributes to cost reduction. This is truly a device with various practical values.

[Brief explanation of drawings]

The figure shows an embodiment of this invention, and is a partially cutaway longitudinal sectional front view of the main part in the pillar erected state. Code explanation, 1... Concrete pole, 2...
Bottom plate, 3, 9...PC steel wire, 4...Prestressed concrete pile, 5...End plate, 6...Bolt tightening hole, 7...Bolt insertion hole, 8...Bolt.

Claims (1)

[Scope of utility model registration request] A bottom plate with a larger diameter is integrally installed with the tension steel wire at the lower end of the concrete pole, while a bottom plate of the concrete pole is installed at the upper end of the prestressed concrete pile sunk to a predetermined depth in the ground. In a concrete pole erection device that connects the concrete pole and prestressed concrete pile by placing a bottom plate and tightening the end plate and the bottom plate with bolts,
Bolt insertion holes to be drilled in the bottom plate provided at the lower end of the concrete pole are used to connect the end plate to the tensioning plate via bolts during centrifugal compaction of the prestressed concrete pile to be connected to the lower part of the concrete pole. A concrete pole erection device, characterized in that the concrete pole is provided facing a bolt tightening hole provided in the end plate when the concrete pole is connected.