JP2020026724A - Connection device for connecting concrete member, in particular concrete member consisting of special high voltage cable connection measure and special high voltage cable connection measure having concrete member connected by connection device - Google Patents

Abstract

To provide a connection device maintaining an original shape even deformed and a special high voltage cable connection measure having a concrete member connected by the connection device.SOLUTION: The connection device comprises: a first anchor part and a second anchor part fixed by an insert molding into a concrete member 110; a yoke part connected to each of them; a back surface plate having a first bolt hole; and at the york part, an impact absorption part configuring a second bolt hole by joining a plurality of plates with a predetermined width, disposed at the york part, and having a third bolt hole to insert the bolt as well. The first bolt hole, the second bolt hole, and the third bolt hole are in communication to insert the bolt, the impact absorption part has a plurality of absorption members in a curved surface shape and the plurality of absorption members are connection devices to connect the concrete members each other disposed independently and deformable respectively when contacted each other and received with the impact.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a connecting device integrally provided at an end of a concrete member for connecting a concrete member and the like, and a special high-voltage cable connecting tub having a concrete member connected by the connecting device.

  In the case of connecting the concrete members or for drawing them together, connecting means is required between the concrete members. For example, the joint structure of a precast concrete handrail disclosed in Japanese Patent Application Laid-Open No. 08-013737 is formed by aligning the lower surface of the precast concrete handrail with the upper surface of a joint of a building structure connected to the handrail. The other end of the connector having the base buried inside the handrail is projected downward from the lower surface, and a concave portion is formed on the upper surface of the joint to receive the other end of the connector and to be filled with a bonding agent. The recess is configured to be separated from the upper edge of the joint.

  However, the joint structure of the precast concrete handrail can connect the concrete members, but the seismic resistance of the connected concrete members is not considered, and the other end of the PC steel rod is exclusively used. It is tightened using a stranded wire or a double-threaded bolt, and depends on expansion and contraction of the bolt and the like.

  Therefore, Japanese Patent Application Laid-Open No. 2006-070622 is disclosed as a device considering the earthquake resistance. This is a connecting device integrally provided at the end of the concrete member for connection or the like of the concrete member. The connecting member is integrated with the end of the concrete member. And a connection bolt for performing connection and the like, the connection bolt can be operated from a working port formed outside the end of the concrete member, and when an external input exceeding a specified value is applied to the connection member via the connection bolt. An external force absorbing member capable of absorbing and deforming it and holding the connection of the concrete member or the like is provided between the connecting member and the connecting bolt.

  In the above invention, a certain degree of earthquake resistance is secured, so there is no particular problem with that. However, the connection member may be plastically deformed, and the connection member may need to be replaced after an earthquake occurs. Further, there is a demand for further miniaturization of the connection device and reduction of the manufacturing cost.

JP 08-013737 A JP-A-2006-070622

  The present invention has been made in view of the above points, and an object thereof is to provide a special high-voltage cable connecting tub having a connecting device that maintains an original shape even when deformed, and a concrete member connected by the connecting device. It is to provide.

A connection device according to a first aspect for solving the above-mentioned problems includes a first anchor portion fixed by insert molding to a concrete member,
A second anchor portion fixed by insert molding to the concrete member,
A first anchor portion, a second anchor portion, a yoke portion connected to each of the first anchor portion,
A back plate joined to the yoke part and having a first bolt hole for inserting a bolt;
A shock absorbing portion disposed on the yoke portion and having a third bolt hole for inserting a bolt,
The yoke portion forms a second bolt hole by joining a plurality of plates having a predetermined width,
A back plate is in contact with each of the first anchor portion and the second anchor portion,
The first bolt hole, the second bolt hole, and the third bolt hole communicate with each other to pass the bolt,
The shock absorbing portion has a plurality of curved absorbing members,
The plurality of absorbing members are arranged so as to be independently deformable when they come into contact with each other and receive an impact.

  In the connection device according to a second aspect, in the first aspect, the shock absorbing portion has a semicircular shape in a side view.

  In the connection device according to a third aspect, in the first aspect, the shock absorbing portion has a spherical shape.

  Further, the connection device according to a fourth aspect is the connection device according to the first aspect to the third aspect, further including a cushioning member for surrounding the shock absorbing portion.

  Further, the special high-voltage cable connection basin according to the fifth aspect has a plurality of concrete members having the connection device according to the first to fourth aspects, a plurality of bolts for connecting and fixing the connection devices, and a plurality of nuts. Then, a plurality of concrete members are connected by a connecting device by inserting bolts into the first bolt hole, the second bolt hole, and the third bolt hole which are communicated to pass the bolts, and fixing the bolts with nuts. It is for arranging the connection part of the special high-voltage cable.

  Further, the special high-voltage cable connection basin according to the sixth aspect is the fifth aspect, wherein the ceiling for closing the upper part of the plurality of connected concrete members and the wall for closing both ends of the plurality of connected concrete members are provided. And a part.

  Since the present invention is configured and operates as described above, even if it is deformed, a special high-voltage cable connection tub having a connection device that maintains its original shape and a concrete member connected by the connection device Can be provided.

A is a perspective view of a special high-voltage cable connection measure. B is an exploded perspective view of A. A is a plan view of the special high-voltage cable connection measure in an exploded state. FIG. 2B is a sectional view taken along line IIB-IIB of FIG. C is a front view of the disassembled state of the special high-voltage cable connection basin. FIG. 2A is an enlarged plan view of a connection portion between concrete members in FIG. 2A. FIG. 2B is an enlarged side view of a connection portion between the concrete members in FIG. 2B. FIG. 1A is a perspective view of a state in which connection devices are connected to each other. B is a plan view of a state where the connection devices are connected to each other. C is a sectional view taken along line VIC-VIC of B. A is a perspective view of the integrated yoke part and the shock absorbing part. B is a side view of the integrated yoke part and the shock absorbing part. A is a front view of the integrated yoke part and the shock absorbing part. FIG. 2B is a rear view of the integrated yoke portion and the shock absorbing portion. C is a plan view of the integrated yoke part and the shock absorbing part. A is a perspective view of the integrated yoke piece and the absorbing member. B is a front view of the integrated yoke piece and the absorbing member. C is a rear view of the integrated yoke piece and the absorbing member. A is a plan view of the integrated yoke piece and the absorbing member. B is a rear perspective view of the integrated yoke piece and the absorbing member. C is a side view of the integrated yoke piece and the absorbing member. FIG. 7A is a perspective view of a state in which connection devices of another embodiment are connected to each other. B is a plan view showing a state in which the connection devices of another embodiment are connected to each other. C is a sectional view taken along line IXC-IXC of B. A is a plan view showing a state in which a special high-voltage cable and its connection part are arranged in a special high-voltage cable connection basin. B is a cross-sectional view showing a state in which the special high-voltage cable and its connection part are arranged in the special high-voltage cable connection basin.

  Hereinafter, the present embodiment will be described with reference to the illustrated embodiment. The special high-voltage cable connection measure 100 is a measure for literally arranging a connection portion 350 between the special high-voltage cables 300 and can be buried under the roadway, and is used for protecting and storing various cables for power transmission. And is sometimes called a cable trough. The special high-voltage cable 300 is used for power transmission between high-voltage substations and power transmission of electric railways. For example, the special high-voltage cable 300 can withstand a high voltage of 66 to 77 kilovolts. The special high-voltage cable connection basin 100 will be further described later.

  The connection basin 100 has a plurality of concrete members 110, and further has lids 120, 120, 120 and side walls 130, 130. The concrete member 110 is similar to a so-called U-shaped groove, and has a plurality of connecting devices 10 in this embodiment to connect them. In order to connect the concrete members 110 to each other, the connecting devices 10 arranged respectively are tightened by bolts 200 and nuts 250 to connect the concrete members 110 to each other.

  The connection device 10 includes a first anchor portion 20 fixed by insert molding to the concrete member 110, a second anchor portion 30 fixed by insert molding to the concrete member 110, and the first anchor portion 20. , A second anchor portion 30, a yoke portion 40 to be connected to the second anchor portion 30, a shock absorbing portion 50 disposed integrally with the yoke portion 40, and a back plate 60 joined to the yoke portion 40.

  The first anchor portion 20 and the second anchor portion 30 are the same, but for the sake of simplicity, both will be described. The first anchor portion 20 has a rod shape, for example, is made of rebar steel, and is used as an anchor. It has a necessary and sufficient length. Although not shown, the surface of the first anchor portion 20 may have an unevenness to prevent the first anchor portion 20 from being pulled out. Similarly, the second anchor portion 30 has a rod shape and is made of, for example, steel such as steel bars, and has a necessary and sufficient length as an anchor. Although not shown, the surface of the second anchor portion 30 may have an unevenness to prevent pulling out. Thus, in the concrete member 100, when the first anchor portion 20 and the second anchor portion 30 are insert-molded, the structure is difficult to pull out.

  In the present embodiment, the yoke portion 40 is composed of two yoke pieces 41, 41 formed by bending two plate-shaped plates having a predetermined width into a wave shape. The yoke piece 41 has a semicircular shape in the center in a cross-sectional view, and has a semicylindrical shape. , 44, and oblique sides 45, 45 projecting obliquely upward from the horizontal portions 44, 44, respectively, in cross section.

  In the present embodiment, the shock absorbing portion 50 is substantially semicircular in cross section and has a so-called bowl shape, and includes the curved absorbing members 51 and 51 constituting the shock absorbing portion 50. The absorbing member 51 is disposed integrally with the above-described yoke piece 41. When an impact is applied to the absorbing member 51, the absorbing member 51 can be deformed to absorb the impact.

By joining the yoke pieces 41, 41 on which the absorbing members 51, 51 are respectively disposed, the yoke section 40 having the shock absorbing section 50 can be configured. In this case, in other words, while the horizontal portions 44, 44 of the yoke pieces 41, 41 are joined to each other, the absorbing members 51, 51 only come into contact with each other, but are not joined. Here, the term “joining” is preferably welding, but may be adhesion.

  More specifically, when a steel material such as an iron material is used, the horizontal portions 44, 44 of the yoke pieces 41, 41 are joined to each other by welding. However, the absorbing members 51, 51 are only in contact with each other and are not welded to each other. Thus, the absorbing members 51, 51 are only in contact with each other, and are not restrained from each other. Therefore, when a shock is applied to the shock absorbing portion 50, the respective absorbing members 51, 51 become independent as described later. Then, the impact can be individually absorbed. In this manner, the impact of the ground vibration (for example, a repeated load due to the running of the automobile) applied to the concrete member 110 can be easily absorbed.

  When the horizontal portions 44, 44 of the yoke pieces 41, 41 are joined to each other by welding, a certain gap is formed between the oblique sides 45, 45. The first anchor portion 20 and the second anchor portion 30 are inserted and fixed in this gap.

  The back plate 60 has a rectangular plate shape. It is preferably a steel material, and has a first bolt hole 61 at its center. This is a hole for inserting the bolt 200 literally, as described later.

  At the same time, the horizontal portions 44, 44 of the yoke pieces 41, 41 are joined to each other by welding, and the semi-cylindrical yoke piece main bodies 42, 42 are also joined by welding. As a result, the joined yoke piece main bodies 42 have a cylindrical shape, and a second bolt hole 43 is formed at the center thereof.

  When the connecting portions of the horizontal portions 44, 44 of the yoke pieces 41, 41 are joined to each other by welding as described above, the absorbing members 51, 51, which are integrally disposed on the yoke pieces 41, 41, respectively, receive an impact. The absorbing portion 50 is formed, and has a third bolt hole 52 at the center thereof. Further, the first bolt hole 61, the second bolt hole 43, and the third bolt hole 52 communicate with each other, so that the bolt 200 can be inserted. That is, the first bolt hole 61, the second bolt hole 43, and the third bolt hole 52 are arranged so as to be continuous to insert the bolt 200. Further, at this time, the absorbing members 51, 51 disposed integrally with the yoke pieces 41, 41 are not welded to each other, so that they are in contact with each other.

  Further, the connection device 10 having the above configuration can further include a buffer member 70. The cushioning member 70 is made of a synthetic resin, and the absorbing members 51, 51 are not welded as described above. Therefore, the cushioning members 70 absorb the deformation caused by the absorption members 51, 51 absorbing the shocks individually. Thereby, the impact transmitted to the concrete member 100 can be reduced. Therefore, damage to the concrete member 100 can be prevented as much as possible. Note that the cushioning member 70 is disposed so as to surround the shock absorbing portion 50. That is, the shock absorbing portion 50 is arranged inside the buffer member 70. The cushioning member 70 is preferably made of an elastic material such as rubber or silicon.

  The connecting device 10 is disposed on each of the side surfaces 111 and 111 of the concrete member 110, and the connecting device 10 is disposed on the bottom 112. When the concrete member 110 is manufactured, the connection device 10 is integrally arranged by so-called insert molding. Most of the connection device 10 is included in the concrete member 110, and the concrete member 110 has openings 115, 115, 115, and a bolt 200 is inserted into the openings 115, 115, 115, and the bolt 200 is inserted. 200 is inserted through the first bolt hole 61, the second bolt hole 43, and the third bolt hole 52, and a nut 250 is inserted through the other opening 115. By screwing, the concrete members 110 can be connected to each other.

  The same connection device 10 is insert-molded in the side wall portions 130 and 130, and can be connected in the same manner. As described above, the special high-voltage cable connection basin having the side wall portion 130, the concrete members 110, 110, 110, 110, 110, 110, and the side wall portion 130 and having the lids 120, 120, 120 on the upper portion thereof. 100 can be configured.

  In the connection device 15 of the other embodiment, the shape of the shock absorbing portion 50A is different. That is, the shape of the shock absorbing portion 50A is spherical in a side view. The other configuration is the same as that of the connection device 10, and the same reference numerals are given and the description thereof is omitted. As described above, the connecting device 10 of the present embodiment and the connecting device 15 of the other embodiments can be reduced in size and manufacturing cost.

  The inside dimensions of the special high-voltage cable connection basin 100 in this embodiment are preferably 4500 mm in length, 1350 mm in width, and 1000 mm in height. With this size, the connection portion 350 of the special high-voltage cable 300 that can withstand a high voltage of 66 kV to 77 kV can be arranged. In addition, this size facilitates burial on a road.

  In addition, if the size is the above, the floor for excavation at the time of burial becomes shallower, and when buried in a road or the like, the pressure on the side wall part 130 is reduced. In addition, as described above, the connection basin 100 can be constructed with a small heavy machine by reducing the weight. In addition, the concrete members 110 in the connection basin 100 are subjected to a tightening operation after the installation and integrated.

  In addition, since the special high-voltage cable connection basin 100 in this embodiment has a withstand load of 25 tons, it can be buried underground, and as described above, ground vibration applied to the concrete member 110 (for example, repeated Load) can be easily absorbed. In addition, the special high-voltage cable 300 and its connection portion 350 are arranged in the special high-voltage cable connection basin 100, and the possibility of sinking can be eliminated as much as possible by filling the inside with the gravel. Along with this, it is not necessary to arrange the special high-voltage cable connection measure 100 on the ground, and the installation does not deteriorate the landscape. Therefore, for example, an effect that local residents can easily gain an understanding can be expected.

Reference Signs List 10 connecting device 15 connecting device 20 of other embodiment first anchor portion 30 second anchor portion 40 yoke portion 41 yoke piece 43 second bolt hole 50 shock absorbing portion 50A shock absorbing portion 51 of another embodiment shock absorbing member 52 3 bolt hole 60 back plate 61 first bolt hole 70 cushioning member 100 special high-voltage cable connection measure 110 concrete member 120 lid 130 side wall 200 bolt 250 nut 300 special high-voltage cable 350 connection

Claims (6)

A first anchor portion fixed by insert molding to a concrete member,
A second anchor portion fixed by insert molding to the concrete member,
A yoke part connected to the first anchor part, the second anchor part, and
A back plate joined to the yoke portion and having a first bolt hole for inserting a bolt;
The yoke portion forms a second bolt hole by joining a plurality of plates having a predetermined width,
A shock absorbing portion disposed on the yoke portion and having a third bolt hole for inserting a bolt;
Has,
The back plate is in contact with each of the first anchor portion and the second anchor portion,
The first bolt hole, the second bolt hole, and the third bolt hole communicate with each other to pass a bolt,
The impact absorbing portion has a plurality of curved absorbing members,
A connecting device for connecting concrete members arranged so as to be independently deformable when the plurality of absorbing members come into contact with each other and receive an impact. The connection device for connecting concrete members according to claim 1, wherein the shock absorbing portion has a semicircular shape in a side view. The connecting device for connecting concrete members according to claim 1, wherein the shock absorbing portion has a spherical shape. The connection device according to any one of claims 1 to 3, further comprising a buffer member surrounding the shock absorbing portion. A plurality of concrete members having the connection device according to any one of claims 1 to 4,
Bolts for connecting and fixing the connection devices with each other, each having a plurality of nuts,
By inserting the bolt into the first bolt hole, the second bolt hole, and the third bolt hole that communicate with each other to pass the bolt, and fixing the bolt with the nut, the plurality of concrete members are removed. A special high-voltage cable connection box for arranging a connection portion of the special high-voltage cable connected by the connection device. The connecting part of the special high-voltage cable according to claim 5, further comprising a ceiling part for closing an upper part of the plurality of connected concrete members, and a wall part for closing both ends of the plurality of connected concrete members. Special high-voltage cable connection basin for placement.

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