JP6667302B2 - Underground box - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an underground buried box which is buried underground and accommodates a cable and a connection portion thereof.

An underground box called a handhole for accommodating a cable or a connection portion thereof may be installed along a railway line. With such a handhole, a necessary work can be performed by inserting a hand from the ground into a cable laid underground or a connection portion thereof.
Conventionally, the installation of a handhole first excavates the construction site, retains the periphery of the excavation part, creates a formwork in it, pours concrete, removes the formwork after curing, and fills in the surroundings It was done by the construction. As described above, the construction of the concrete handhole requires a great deal of labor and days.

  In view of the above, there have been proposed several inventions in which the handhole is assembled (for example, see Patent Documents 1 to 3). The hunt hole of the above-mentioned type forms a box-shaped hand hole by fastening panels to each other or a panel and a frame member with a fastener. Further, the assembling hunt hole of Patent Document 3 forms a cubic hand hole by combining six panels of up, down, front, rear, right and left. According to such an invention, the labor for installing the handhole can be significantly reduced.

JP-A-11-205984 JP 2005-030044 A Japanese Patent No. 4709803

However, the assembling handholes of Patent Document 1 and Patent Document 2 have a problem that when assembling at a construction site, a hole slightly larger than the handhole must be excavated in order to secure a work space. is there. Depending on the working space, each part of the handhole can be fastened using a stop. The working space will be backfilled after the handhole is assembled.
On the other hand, Patent Literature 3 describes that six panels may be combined only by fitting concave and convex without using bolts, nails, or an adhesive. However, in the configuration of Patent Literature 3, since only six separated panels are combined, there is a problem that each panel is not stabilized during the combination of these six panels. For example, in a state where the top plate is not assembled, when an external force is applied to the left and right panels from the left and right, the panels easily fall down. When laying a cable in a handhole, it may be convenient if the top surface of the handhole is removed so that the cable can be pulled in or out. However, it is difficult to stably perform such a work in a configuration in which only the upper, lower, front, rear, left, and right panels are combined.

  The present invention relates to an assembling type underground burying box, which can be assembled at a construction site without securing a large work space around the box, and has a strength secured even with a top panel removed. The purpose is to provide a middle buried box.

The underground box of the present invention is
A plurality of framing parts in which a horizontal member passed right and left and two vertical members erected on the left and right portions of the horizontal member are rigidly connected,
A plurality of side panels serving as side walls,
A top panel that becomes the upper wall,
With
The plurality of side panels are engaged with and fixed to the vertical members of the plurality of skeleton parts .

According to this configuration, the underground box can be assembled at the construction site without preparing a large work space around, that is, a large area installation hole. Specifically, after digging and preparing a construction site, fixing a plurality of framing members at the construction site, engaging a plurality of side panels with a plurality of vertical members of the framing parts, Are provided. Such an operation can be performed only from the inside by a worker entering the installation hole. Therefore, the underground box can be assembled without requiring a work space larger than the bottom area of the underground box. Therefore, the underground box can be constructed with a small excavation amount, and the backfill of the excavated portion after the construction can be reduced.
Furthermore, according to the above configuration, the frame component can provide rigidity against external force from the left and right directions. In addition, the left and right side panels engaged with the longitudinal members provide rigidity against external forces from the front-rear direction. Therefore, even if the top panel is removed, the strength of the underground box can be ensured, and work such as drawing in or pulling out a cable can be performed with the top panel removed.

Here, the vertical member has a guide frame that guides one edge of the side panel so as to be sandwiched therethrough from above,
Each of the plurality of side panels may be engaged with a pair of the guide frames provided on a pair of adjacent vertical members among the plurality of vertical members.
According to this configuration, the frame component and the side panel can be easily and firmly engaged.

Further, the underground box of the present invention
A bottom panel disposed on the cross member;
The bottom panel has an overhang that projects between a pair of adjacent vertical members when viewed from above,
The overhanging portion may be sandwiched between the side panel and the framing component to fix the bottom panel.
According to this configuration, the bottom panel can be easily installed and fixed.

Also, the underground box of the present invention,
It also has a bottom frame part that serves as a base,
The bottom frame component is provided with a plurality of engagement portions that respectively engage with the plurality of skeleton components,
The plurality of frame parts may be configured to be engaged with and fixed to the plurality of engagement portions of the bottom frame part.

  With this configuration, it is possible to easily and reliably fix and position the plurality of frame parts.

Further, the plurality of engagement portions include:
A front engagement portion that engages with the skeleton component when the skeleton component is moved from inside the bottom frame component to the front end of the bottom frame component;
A rearward engaging portion that engages with the framing component when the framing component is moved from inside the bottom frame component to a rear end of the bottom frame component;
Should be included.

  According to this configuration, a plurality of frame parts can be fixed only from the inside with a worker entering the installation hole. Therefore, the underground box can be assembled without requiring a work space larger than the bottom area of the underground box.

Further, it is preferable that the front engagement portion and the rear engagement portion are provided with a restraining portion for restraining the skeleton component at the engaging position.
According to such a configuration, when the skeleton component is moved from the inside to the front end portion or the rear end portion and is engaged with the front engagement portion or the rear engagement portion, the framing component can be moved to a position where the framing component is stopped by the stopping portion. Therefore, workability can be improved.

Further, the bottom frame component may be configured to include a connecting portion connectable to another bottom frame component on each of the opposing sides.
According to this configuration, the underground box can be formed into a U-shaped groove that is long in one direction by connecting the plurality of bottom frame parts in one direction and not providing the side panel of the connected part.

  ADVANTAGE OF THE INVENTION According to the underground buried box of this invention, it is possible to assemble at a construction site without securing a large work space around, and to secure the strength even when the top panel is removed.

It is an exploded perspective view showing each part of an underground box concerning an embodiment of the invention. It is a figure which shows the 1st assembling process of the underground box which concerns on embodiment. It is a figure which shows the 2nd assembling process of the underground box which concerns on embodiment. It is a figure showing the 3rd assembling process of the underground box concerning an embodiment. It is a figure which shows the 4th assembling process of the underground box which concerns on embodiment. It is a perspective view which shows the bottom frame part of the underground box of the modification of embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view showing each part of the underground box according to the embodiment of the present invention. 2 to 5 are diagrams illustrating first to fourth assembling steps of the underground box.
In this specification, the directions of up, down, front, rear, left, and right mean the directions of up, down, front, rear, right, and left in a state where the underground box 1 is installed horizontally. In addition, the front-back direction means a direction in which a cable insertion hole and a cable extraction hole are provided.
The underground box 1 according to the embodiment of the present invention is a buried box called, for example, a handhole, which is buried in the ground and accommodates cables and their connection parts. The underground box 1 includes a bottom frame component 10, frame members 21 to 23, a bottom panel 30, left and right side panels 40, front and rear side panels 50, and a top panel 60.

Among them, the bottom frame component 10 and the frame components 21 to 23 are metal components, and the bottom panel 30, the side panels 40 and 50, and the top panel 60 are high-strength resin components.
The bottom frame component 10 is a component that serves as a base of the underground box 1 and supports the frame components 21 to 23. On the left and right edges of the bottom frame component 10, rails 11 and 12 extending in the front-rear direction, on which the frame components 21 to 23 can be placed and slid, are provided.
The bottom frame component 10 is provided with engaging portions 14 to 16 for engaging with the frame components 21 to 23 at the front end, the rear end, and the center of the rails 11 and 12, respectively. More specifically, the engaging portions 14 to 16 have a configuration in which a piece of material projects from the side above the rails 11 and 12.

The frame parts 21 to 23 are formed by stiffening a horizontal member T, which extends to the left and right at the bottom of the underground box 1, and two vertical members V, which are erected on the left and right portions of the horizontal member T, by welding or the like. Connected and configured. At the left and right end portions of the horizontal member T, there is provided an overhang portion 201 which extends laterally from the vertical member V. The overhang portion 201 is a portion that engages with the engagement portions 14 to 16 of the bottom frame component 10. In addition, a stopper 202 is provided on the front skeleton part 21 and the rear skeleton part 23 so as to abut on the engaging portions 14 and 16 of the bottom frame part 10.
The vertical members V of the frame members 21 to 23 are provided with guide frames 205 and 206 (see FIGS. 3 and 4) into which the vertically extending edge portions of the side panels 40 and 50 are fitted. The guide frames 205 and 206 have a stripe shape and extend from the upper end to the lower end of the vertical member V. Each vertical member V is provided with two guide frames 205, 205 (or 205, 206) having different directions, and is paired with a guide frame 205 (or guide frame 206) of another vertical member V adjacent in the circumferential direction. To guide and hold the side panels 40, 50.

  The bottom panel 30 is a panel that is installed on the bottom frame component 10 and the cross member T of the frame components 21 to 23 and serves as a bottom wall in the box. The bottom panel 30 is provided with a plurality of notches 31 for avoiding the plurality of vertical members V, respectively, and a plurality of overhang portions 32 extending between the plurality of vertical members V when viewed from above. The left and right side panels 40 are plate members constituting left and right side walls of the underground box 1. In addition, irregularities may be provided on the outer surface of the side panel 40. Also, different sizes of irregularities may be provided on the front and the back, so that it is possible to select which is the outer surface of the underground box 1. Due to such irregularities, when the surroundings are filled with earth and sand, the resistance between the side panels and the earth and sand increases, and the effect of preventing the side panels 40 and 50 from floating can be increased.

The front and rear side panels 50 are plate members constituting front and rear side walls of the underground box 1. The side panel 50 is provided with various notches 51 and 52 for drawing in or pulling out the cable according to the cable or the like accommodated in the underground box 1.
The top panel 60 is a plate material that is placed above and forms the upper wall of the underground box 1. Although shown in a simplified manner in FIGS. 1 and 5, when the top panel 60 is disposed above the underground box 1, the top panel 60 is positioned at the upper opening of the underground box 1 so as not to move in the horizontal direction. It may have an uneven shape so as to fit.

<Construction method>
Next, a method of constructing the underground buried box 1 of the present embodiment will be described.
Here, an example in which the underground box 1 is installed to accommodate a part of the power transmission cable in the ground along the railway line will be described.
In order to construct the underground buried box 1, excavation of the construction site is first performed. Excavation may be performed so that a space in which the underground buried box 1 can be installed can be secured, and a large work space is not required around the excavation.

  After the excavation is completed, the excavation site is leveled, and the bottom frame component 10 is installed at the excavation site. Next, the frame parts 21 to 23 are assembled to the bottom frame part 10. For example, when assembling the front frame part 21, as shown in FIG. 2A, first, the left and right ends of the frame part 21 are arranged so as to ride on the rails 11 and 12 of the bottom frame part 10. Subsequently, as shown in FIG. 2B, the skeleton part 21 is moved so that the skeleton part 21 is moved from inside the bottom frame part 10 to the front end. Then, the projecting part 201 of the frame part 21 is sandwiched between the engagement part 14 and the rails 11 and 12, and the frame part 21 is engaged with the bottom frame part 10. Further, the stopper 202 of the framing part 21 abuts on the side surface (corresponding to the stopping part according to the present invention) of the engaging part 14, and the framing part 21 is restrained and its engaging position is determined.

Similarly, the center frame part 22 and the rear frame part 23 are engaged with the center engagement part 15 and the rear end engagement part 16 of the bottom frame part 10, respectively. In addition, although the stopper is not provided so that the center frame part 22 may be moved from either the front-rear direction and engaged with the engaging portion 15, a similar stopper may be provided. The stopper 202 is located on the engagement portion 16 near the center of the bottom frame component 10 so that the rear frame component 23 moves from the inside of the bottom frame component 10 to the rear end and engages with the engagement portion 16. Section.
Next, as shown in FIG. 3, the bottom panel 30 is lowered from above and placed on the bottom frame component 10 and the cross members T of the frame components 21 to 23. At this time, as shown in FIG. 4, the notch 31 of the bottom panel 30 avoids the vertical member V, and the projecting portion 32 projects between a pair of adjacent vertical members V.

Subsequently, as shown in FIG. 4, the side panel 40 is installed between the vertical members V. Specifically, the side panel 40 is fitted into the two guide frames 205 of the pair of vertical members V so that two opposing edges thereof are passed from above to below, and comes off from the vertical members V. It is set up not to be.
Similarly, the front and rear side panels 50 are also installed between the vertical members V. Specifically, the side panel 50 also has two opposing edges fitted into the two guide frames 206 of the pair of vertical members V so as to pass from above to below, and comes off from the vertical members V. It is set up not to be.
As shown in FIG. 5, when the side panel 40 is installed, the side panel 40 rides on the overhang 32 of the bottom panel 30, and the bottom panel 30 is sandwiched between the side panel 40 and the bottom frame component 0. Fixed. Although the front and rear side panels 50 do not ride on the overhang 32 in the drawing, the front and rear side panels 50 may also ride on the overhang 32.

In this state, a pipe joint can be connected to the notch 52 provided in the side panel 50, or a trough can be connected to the other notch 51, and the power transmission cable can be pulled in or pulled out through these. .
At this time, the top panel 60 is not installed, but even when a large load F1 (FIG. 5) is applied to the underground box 1 from the left and right directions, the frame parts 21, 22, and 23 are buried underground due to the rigidity. Box 1 can withstand load F1. Further, even when a large load F2 (FIG. 5) is applied to the underground buried box 1 from the front-rear direction, the left and right side panels 40 receive forces in the direction along the plane via the frame parts 21 to 23, The middle buried box 1 can withstand the load F2.
Subsequently, by assembling the top panel 60 with the upper opening, the assembly of the underground box 1 is completed.
When the assembling of the underground burying box 1 is completed, the surroundings are backfilled, the ground is conditioned, and the like is completed.

As described above, according to the underground buried box 1 of the present embodiment, the underground buried box 1 can be assembled at the construction site by the above-described construction method without preparing a large work space around the box. . Therefore, the underground box can be constructed with a small excavation amount, and the backfill of the excavated portion after the construction can be reduced.
Further, according to the underground box 1 of the present embodiment, the frame parts 21 to 23 can provide rigidity against external force from the left and right directions. In addition, the right and left side panels 40 engaged with the vertical members V provide rigidity against external force from the front-rear direction. Therefore, even if the top panel 60 is removed, the strength of the underground box 1 can be ensured, and work such as drawing in or pulling out a cable can be performed with the top panel 60 removed.

(Modification)
FIG. 6 is a perspective view showing a bottom frame part of the underground box according to the modification of the embodiment.
The underground box of the modified example is provided with connecting portions 18a and 18b on the bottom frame part 10A so that the underground box can be connected in the front-rear direction. Other configurations are the same as those of the underground box 1 of the above-described embodiment, and a detailed description thereof will be omitted.
The bottom frame component 10A is provided with connecting portions 18a and 18b on front and rear opposing sides. Thereby, as shown in FIG.6 (b), several bottom frame components 10A can be connected in the front-back direction.

When a plurality of the bottom frame parts 10A are connected, by omitting the side panel 50 of the connected part, an underground box having an internal space that is continuous and long in the front-rear direction can be configured. This allows the underground box to be used as a trough.
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. For example, the engagement between the bottom frame part 10A and the frame parts 21 to 23 is not limited to the specific example shown in the drawing, and various configurations such as applying a configuration in which both are engaged by hooking a hook on a hook receiver, for example. Various modifications can be adopted. Further, the engagement configuration between the vertical member and the side panel may include a configuration in which the two are fastened from the inside with bolts or the like. Further, the bottom frame component may have a configuration in which the bottom panel is connected in advance. Other details described in the embodiments can be appropriately changed without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Underground burial box 10 Bottom frame part 11, 12 Rail 14-16 Engagement part 21-23 Frame part 30 Bottom panel 32 Overhang part 40, 50 Side panel 60 Top panel

Claims (6)

A plurality of framing parts in which a horizontal member passed right and left and two vertical members erected on the left and right portions of the horizontal member are rigidly connected,
A plurality of side panels serving as side walls,
A top panel that becomes the upper wall,
With
The vertical member has a guide frame that guides one edge portion of the side panel from above, so as to sandwich the edge portion,
The underground box, wherein each of the plurality of side panels is fixed by being engaged with a pair of the guide frames provided on a pair of adjacent vertical members among the plurality of vertical members. A plurality of framing parts in which a horizontal member passed right and left and two vertical members erected on the left and right portions of the horizontal member are rigidly connected,
A plurality of side panels serving as side walls,
A top panel that becomes the upper wall,
Bottom frame parts that serve as a base,
With
The bottom frame component is provided with a plurality of engagement portions that respectively engage with the plurality of skeleton components,
The plurality of skeleton parts are engaged with and fixed to the plurality of engagement parts of the bottom frame part,
The underground box, wherein the plurality of side panels are engaged with and fixed to the vertical members of the plurality of frame parts. A bottom panel disposed on the cross member;
The bottom panel has an overhang that projects between a pair of adjacent vertical members when viewed from above,
Underground box according to claim 1, wherein the protruding portion is characterized in the that the bottom panel is secured by being sandwiched between the scaffold component and the side panels. In the plurality of engagement portions,
A front engagement portion that engages with the skeleton component when the skeleton component is moved from inside the bottom frame component to the front end of the bottom frame component;
A rearward engaging portion that engages with the framing component when the framing component is moved from inside the bottom frame component to a rear end of the bottom frame component;
The underground box according to claim 2 , comprising: 5. The underground box according to claim 4, wherein the front engagement portion and the rear engagement portion are provided with a restraining portion that restrains the skeleton component at the engaging position. Said bottom frame part, claim 2, characterized in that it comprises respective sides facing the connecting portion connectable to another of the bottom frame part, claim 4, land according to any one of claims 5 Inside buried box.

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