JP2002339325A - Concrete stand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight concrete stand which can be produced at a factory and can be easily assembled by manpower on the job site. SOLUTION: Vertical coupling bolts 5 for supporting equipment, insert 8 to 10 for tightening bolts 7, and an insertion hole 11 for an electric cable continuing from the top surface of the highest stage to the inside at each stage are provided, the main body 1 of the stand is formed by laying blocks 2 to 4 stages, and a band-shaped coupling plate 6 to be crossed on the side surface of each stage and a tightening bolt to be pushed in an fixed to the side surface of each stage are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a concrete gantry in which a crossing obstacle sensor or the like is installed as an installation device.

[0002]

2. Description of the Related Art In general, at a railroad crossing, before an obstacle gets off, it is necessary to detect in advance that an obstacle obstructing the traffic of the train is present in the railroad crossing. An object sensor S is provided.

[0003] The obstacle sensor S is mounted on the concrete gantry C by being supported on the top surface of a concrete gantry C buried below the ground with several erection bolts B. Further, the electric cable H of the obstacle sensor is laid by being drawn into the inside from the top surface of the concrete gantry C and drawn out to the side, and covering the outside line portion with the concrete lid R.

[0004] Conventionally, the concrete gantry is provided by cast-in-place by assembling a concrete formwork on site and pouring fresh concrete into the formwork and curing it. In the case of cast-in-place of a concrete gantry, the work must be interrupted every time a train comes and goes due to safety, and it takes a long time to cure the ready-mixed concrete.

[0005] Instead of cast-in-place, the concrete gantry may be prepared by bringing it in the factory in advance to the site. However, when this concrete base is integrally formed as a whole, a large one has a height of 900 mm and a weight of three.
20kg, height 600mm, weight 210 even small size
Heavy equipment is required for transportation because it is as heavy as about Kg, but heavy equipment is extremely inconvenient in some places due to locational conditions.

[0006]

DISCLOSURE OF THE INVENTION The present invention can be manufactured in a factory, formed into a light-weight product that can be easily transported to the site, and can be easily assembled and installed manually without the need for heavy equipment at the site. It is another object of the present invention to provide a concrete gantry in which electric cables can be drawn in and wired according to the construction conditions at the site.

[0007]

In the concrete gantry according to the first aspect of the present invention, an upright bolt for supporting the equipment is planted and fixed on a top surface of the uppermost step, and an insert of the tightening bolt is attached to a side surface of each step. From the top, the insertion hole for the continuous electric cable is opened at the top of the top, and the gantry body, which has a vertically long trapezoidal shape, is divided into several stacked blocks. It is formed by including a band-shaped connecting plate provided with a through hole of a bolt shaft corresponding to an insert of each step on a plate surface, and a tightening bolt for fixing the connecting plate to a side surface of each step. I have.

In the concrete gantry according to the second aspect of the present invention, each step is formed in a hollow structure while maintaining the thickness of the electric cable insertion hole as a concave groove.

In the concrete gantry according to the third aspect of the present invention, the concrete pedestal is continuous near the inside of the side of each step, is curved toward the center from the middle side of the uppermost step, and is continuously connected to the vertical hole from the middle side of the uppermost step. It is configured by providing an insertion hole for an electric cable which is opened in the center of the upper surface of the upper stage.

[0010] In the concrete gantry according to the fourth aspect of the present invention, a thin wall capable of forming an electric cable insertion hole which is continuous in the vertical direction in the vicinity of the side surface of each step and a hole for drawing the electric cable is provided. It is formed in each step, and furthermore, the mark line of the continuous thin wall is formed on the side surface of each step.

According to a fifth aspect of the present invention, there is provided a concrete gantry, wherein a substantially quadrangular projection is provided on the upper bottom surface and a notch groove for fitting the projection is provided on the lower top surface. ing.

In the concrete gantry according to the sixth aspect of the present invention, the concave portion for fitting the connecting plate is provided continuously on the side surface of each step.

According to a seventh aspect of the present invention, in the concrete frame, a hexagonal bolt is provided as a fastening bolt, and a through hole of a bolt shaft is provided on a plate surface, and the substrate portion is bent from one end of the substrate portion and connected. It is provided with a holding metal fitting for preventing loosening, which comprises a locking piece that engages with the side of the plate and a stopper claw that bends from the other end of the substrate portion and abuts against the side surface of the bolt head.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 8, the embodiment shown in FIG. 1 is similar to that shown in FIGS. It has a rectangular and vertically long trapezoidal shape, and is configured as a concrete gantry equipped with an obstacle sensor for railroad crossings.

In this concrete gantry, as shown in FIG. 2, the gantry main body 1 is divided into three stacked blocks 2, 3, and 4, and each of the tiers 2, 3, and 4 is preliminarily molded from a ready-mixed concrete in a factory. Assembled by things. As shown in FIG. 3, four standing bolts 5 for fixing and supporting the obstacle sensor are planted and fixed on the uppermost stage 2 above the top surface.

The stacking blocks 2, 3, 4 hang the connecting plate 6 on the side surfaces of the respective steps 2, 3, 4 and tighten the tightening bolts 7 from the plate surface of the connecting plate 6, respectively.
4 is assembled as a gantry body 1 by screwing into the inside of the gantry 4 (see FIG. 1). An insert (screw nut) as shown in FIG.
8, 9, and 10 are embedded and fixed from the side surfaces of the steps 2, 3, and 4, respectively.

As shown in FIG. 5, the connecting plate 6 has through holes 6 of bolt shafts corresponding to the inserts of each stage.
A strip-shaped metal plate provided with a, 6b, and 6c on a plate surface is provided. This connecting plate 6 is provided in each of the stages 2, 3, 4
Are provided from the need to fixedly support from three sides. The inserts 8, 9, and 10 are embedded and fixed inside on three sides of each step 2, 3, and 4 (see FIG. 3).

Each of the stacking blocks 2, 3, and 4 is formed in a hollow structure by providing hollow portions 12a, 12b, and 12c each having a thickness for forming the insertion hole 11 of the electric cable as a groove. 4). The hollow portion 12a of the uppermost stage 2 is provided so as to spread in a C-shape from below the vertical hole portion 11b extending from the drawing hole 11a of the electric cable toward the inside. Cavities 12b and 12c of middle stage 3 and bottom stage 4
Is provided so as to have a substantially similar shape to the outer shape.

As shown in FIG. 6, the insertion hole 11 of the electric cable is formed by opening a drawing hole 11a of the electric cable at the center of the top surface of the uppermost step 2 (see FIG. 3). Inside the vicinity of the side surface of the upper surface, the grooves are vertically continuous as concave grooves 11b, 11c, and 11d. Insert 8 so as to reach the extraction hole 11a of
It is provided at a part where no equipment is provided.

In the configuration of the insertion hole 11, the curved groove 11e is preferably formed in a round shape of about 170 mm. With this insertion hole 11, not only the electric cable led out from the uppermost extraction hole 11a can be routed inside immediately below the obstacle sensor, but also the vertical hole portion 11f from near the side surface of the uppermost stage 2.
Even if the wiring is carried out, it is possible to prevent the peeling of the coating of the electric cable or the like by the curved groove 11e.

Each of the stages 2, 3, and 4 is provided with the above-described electric cable insertion hole 11 continuously in the vertical direction near the side surface of each of the stages 2, 3, and 4. (Not shown) can be formed in the thin walls 13a, 13b, 13
c is formed. In addition, the thin walls 13a, 13
Mark lines 14a and 14b of the thin wall are formed continuously on the side surfaces of each of the steps 2, 3 and 4 so that b and 13c can be specified from the outside (see FIG. 1).

In addition, the upper blocks 2 and 3 are provided with projections 15a and 15b each having a substantially quadrangular planar shape.
13b is provided on the bottom surface so as to surround the lower edge. On the other hand, the lower blocks 3 and 4 have projections 15a and 15
The notched grooves 16a and 16b into which the “b” fits are hollow portions 13b and 1
3c is provided on the top surface by notching the upper edge. In addition, the recesses 1 into which the connection plates 6 are fitted are provided on three sides on which the inserts 8, 9, and 10 are embedded and fixed.
7a, 17b and 17c are provided so as to be continuous with each stage.

As the tightening bolt 7 described above, a hexagonal bolt is provided as shown in FIG. The fastening bolt 7 has a board portion 18b provided with a through hole 18a of the bolt shaft 7a in the plate surface, and a hook piece 18 which is bent from one end of the board portion 18b and engages with the side of the connection plate 6.
c and two stopper claws 18d (18) that bend from the other end of the board portion 18b and engage with the side surface of the bolt head 7b.
e) is provided.

As the insert 8 of the tightening bolt 7, a slit 8a is provided from the inner end side to expand the diameter, and
A plurality of notched grooves 8b provided on the outer peripheral surface may be embedded and mounted in the stacking blocks 2, 3, and 4, respectively.
In the insert 8, the function of preventing rotation and detachment can be exhibited by the expansion at the inner end side and the cut groove 8b.

The concrete gantry thus constructed is
900m high from the above components
m, a square having a top surface width of 300 mm, a square having a bottom surface width of 450 mm, weighing about 220 kg, and a small device having a height of 600 mm, a square having a top surface width of 300 mm, and a bottom surface width of 40 mm.
It can be made to be a relatively lightweight one with a square of 0 mm and a weight of about 140 kg.

In the concrete gantry, the stacking blocks 2, 3, and 4 can be transported in a loose state together with the respective assembly parts to the site. At this time, since the stacking blocks 2, 3, and 4 are lightweight, the stacking blocks 2, 3, and 4 can be moved up and down by a simple operation with a small number of workers. For convenience of moving the stacking blocks 2, 3, and 4 up and down, an eyebolt having a suspension ring may be used as the tightening bolt 7.

In order to install the concrete gantry, first, a hole for embedding the gantry body 1 to a predetermined height and the foundation are hardened, and then the gantry body 1 is piled up from the bottom to the top. The stacking of the steps 2 and 3 is performed by the protrusions 15a and 1 of the upper steps 2 and 3.
By fitting 5b into the cutout grooves 16a, 16b of the lower stages 3, 4, the respective stages 2, 3, 4 can be accurately positioned and easily performed.

Next, the connecting plate 6 is inserted into the recesses 17 on each side.
a, 17b, and 17c, and push in and fix them with the tightening bolts 7. The fastening bolt 7 is provided with a presser fitting 18 and a washer 19 on the axis in advance, and the insert 8,
Screw in 9 and 10. In addition, the connecting plate 7 is applied to each step from three sides, and each step 2
3, 4 can be assembled and fixed as the gantry body 1.

After the tightening bolt 7 is screwed in, each stopper claw 18d, 18e of the holding member 18 is turned on as shown in FIG.
Is bent from the substrate portion 18b, and the corners are engaged with the side surfaces of the bolt head 7b to be sandwiched and supported by the stopper claws 18d and 18e, thereby preventing the tightening bolt 7 from being loosened by the vibration accompanying the running of the train. Attached.

After assembling the gantry body 1, the thin walls 13a, 13b, 13
A lead-in hole for leading out an electric cable by piercing any one of c with a punch or the like is provided on a side surface of the gantry body 1.
Since the thin holes 13a, 13b, and 13c can be specified by the mark lines 14a and 14b, the drawing holes can be easily formed by communicating with the insertion holes 11 of the electric cable.

After performing necessary operations up to the drilling of the drop-in hole, an electric cable is routed from the drop-in hole to the pull-out hole 11a to be routed inside the insertion hole 11, and the electric cable is connected to the obstacle sensor. Work such as mounting the obstacle sensor with the mounting bolts 5 and embedding the gantry body 1 to a predetermined height may be performed.

In the above-described embodiment, the installation equipment has been described as an obstacle sensor of a railroad crossing as a concrete mount. However, for example, an embedded installation type concrete block such as a yellow blinking signal indicating a dangerous curve on a general road is used. The present invention can also be applied to a case where various devices to be used as a stand are installed upright.

[0033]

As described above, according to the concrete gantry according to the first aspect of the present invention, the erection bolts for supporting the erection of the equipment, the inserts of the bolster bolts, and the top of the uppermost tier are provided. With a through hole for continuous electric cable provided inside, the gantry body is divided into several stacked blocks and formed, and a strip-shaped connecting plate with through holes for bolt shafts corresponding to the inserts of each stage provided on the plate surface. And fastening bolts that bridge the connecting plate to the side surface of each stage, so that lightweight stacking blocks can be easily transported together with each assembly part in a loose state to the site, and fewer workers are needed without the need for heavy machinery It can be installed on site in a short time by simple work.

According to the concrete gantry according to the second aspect of the present invention, each of the stacked blocks is formed by forming each step into a hollow structure while maintaining the thickness for forming the insertion hole of the electric cable as a concave groove. It can be configured to be even lighter.

According to the concrete frame according to the third aspect of the present invention, the concrete frame is continuous near the inside of the side of each step, curved toward the center from the middle side of the uppermost step, and connected to the vertical hole from the middle side of the uppermost step. By providing an insertion hole for an electric cable that opens in the center of the top of the top, the electric cable can be led out of the top drawer directly under the main body of the equipment, and can be securely connected to the main body of the equipment. Even if wiring is carried out from the vicinity of the side surface to the central vertical hole portion, it is possible to prevent the peeling of the coating of the electric cable from occurring at the curved portion.

According to the concrete gantry according to the fourth aspect of the present invention, an insertion hole for an electric cable which is continuous vertically in the vicinity of the side surface of each step and a drawing hole for the electric cable can be formed. By forming the wall in each step and forming the mark line of the continuous thin wall on the side surface of each step, the electric cable can be easily routed according to the construction conditions at the site.

According to the concrete gantry according to the fifth aspect of the present invention, the substantially quadrangular planar projection is provided on the bottom surface of the upper stage, and the notch groove for fitting the projection is provided on the top surface of the lower stage. It is easy to stack and assemble each stage accurately.

According to the concrete frame according to the sixth aspect of the present invention, the connecting plate is provided on the side surface of the stacking block by providing a continuous recess on the side surface of each step. It can be pressed down and fixed easily.

According to the concrete frame according to the seventh aspect of the present invention, a hexagonal bolt is provided as a tightening bolt, a board portion provided with a through hole for a bolt shaft on a plate surface, and a bent portion is bent from one end of the board portion. By providing a retaining piece for preventing loosening consisting of a latching piece that engages with the side of the connecting plate and a stopper claw that bends from the other end of the board portion and abuts against the side surface of the bolt head, the tightening bolt is It is possible to reliably prevent loosening due to vibrations caused by running of a train or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a concrete gantry according to the present invention.

FIG. 2 is a side view showing the concrete gantry of FIG. 1 for each stacking block.

FIG. 3 is an explanatory diagram showing the concrete gantry of FIG. 1 in a top plane.

FIG. 4 is a cross-sectional view of the concrete gantry of FIG. 1 taken along line AA.

FIG. 5 is a plan view showing a connection plate for assembling and fixing the concrete gantry of FIG. 1;

FIG. 6 is a sectional view of the concrete gantry of FIG. 1 taken along line BB.

FIG. 7 is an explanatory view showing a tightening bolt and a holding member for assembling and fixing the concrete gantry of FIG. 1;

FIG. 8 is an explanatory view showing the fastening bolt and the holding metal of FIG. 13 in an assembled state.

FIG. 9 is a perspective view showing an attached state of an installation device using a concrete gantry according to a general example.

FIG. 10 is a side view showing an installation state of installation equipment by the concrete gantry of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stand main body 2-4 Stacking block 5 Equipment main body upright bolt 6 Connecting plate 7 Tightening bolt 8-10 Insert 11 Electric cable insertion hole 11a Electric cable lead-out hole 11b-11d Concave groove of insertion hole 11e Curved insertion hole Surface 11f Vertical hole portion of insertion hole 12a to 12c Hollow portion of hollow structure 13a to 13c Thin wall 14a, 14b Marking line 15a, 15b Upper projection 16a, 16b Lower cutout groove 17a to 17c Connecting plate Depressed part 18 Clamping bolt for preventing loosening of tightening bolt 18a Through hole of bolt shaft 18b Board part of clamp metal 18c Locking piece of clamp metal 18d, 18e Stopper nail of clamping bolt

Claims (7)

[Claims] 1. A concrete gantry in which an obstacle sensor or the like of a railroad crossing is installed upright as an equipment body, and an upright bolt for supporting equipment is planted and fixed on a top surface of an uppermost step, and an insert of a tightening bolt is attached to each of the mounts. It is embedded and fixed from the side of the step inside, and the insertion hole for the electric cable that is continuous inside each step is opened at the top of the top step, and the base body that presents a vertically long trapezoidal shape from its configuration is a stacking block of several steps And a strip-shaped connecting plate provided with through holes of bolt shafts corresponding to the inserts of the respective stages on the plate surface, and tightening bolts for fixing the connecting plates to the side surfaces of the respective stages. A concrete mount characterized by the above. 2. The concrete gantry according to claim 1, wherein each step is formed in a hollow structure while maintaining a thickness for forming an insertion hole of the electric cable as a concave groove. 3. An electric cable which is continuous near the inside of the side surface of each step, curved toward the center from the middle abdominal side of the uppermost step, and continuous at the vertical hole from the middle side of the uppermost step, and is opened at the center of the top surface of the uppermost step. The concrete mount according to claim 1, wherein a through hole is provided. 4. An electric cable insertion hole which is continuous in the longitudinal direction inside the vicinity of the side surface of each step, and a thin wall through which a lead-in hole of the electric cable can be formed is formed in each step. The concrete gantry according to any one of claims 1 to 3, wherein a mark line of the thin wall is formed on a side surface of each step. 5. The concrete according to claim 1, wherein a projection having a substantially quadrangular shape in a plane is provided on a bottom surface on an upper side, and a notch groove for fitting the projection is provided on a top surface on a lower side. Mount. 6. The concrete gantry according to claim 1, wherein a concave portion into which the connecting plate is fitted is provided continuously on a side surface of each step. 7. A base plate having a hexagonal bolt as a tightening bolt, a through hole for a bolt shaft provided on a plate surface, and a latching piece bent from one end of the base plate and engaged with a side of the connecting plate. And a stopper metal fitting for preventing loosening, comprising: a stopper claw which is bent from the other end of the substrate portion and abuts on a side surface of the bolt head.
7. The concrete gantry according to any one of 6.