JP3472119B2 - Buried joint frame for underground buried boxes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground burial which is attached to the opening at the upper end of the box so as to be stackable with each other in order to raise the opening surface of the box in correspondence with the burial depth of the burial box. The present invention relates to a bulking frame for boxes.

[0002]

2. Description of the Related Art Examples of underground burying boxes include a handhole and a manhole. The underground burying box closes an underground burying box body to be buried in the ground and an opening on an upper surface of the body. It is composed of a lid. As one of the structures in which the lid is placed on the upper surface opening of this underground buried box body in a water-stop state,
The one shown in is known. That is, a waterproof packing 43 having a U-shaped cross section is attached to the upper end of the peripheral wall 42 of the underground buried box main body 41, and the flange 45 provided on the peripheral edge of the lid 44 is the peripheral wall of the underground buried box main body 41. It is inserted in a space 46 provided outside the upper end of 42.

The space 46 is provided to protect the waterproof packing 43 from the earth and sand when the underground box body 41 is buried in the ground. When the rainwater flows into and fills the space 46 through the gap between the formed annular wall 47 and the flange 45 of the lid body 44, the load on the water blocking packing 43 increases. Therefore, the water blocking packing 43 deteriorates at an early stage, and the water blocking function does not work.

Therefore, the present applicant has filed Japanese Patent Application No. 9-4001.
As No. 7, an application was filed in which a drain hole is provided at the bottom of the space so that the space is not filled with water to reduce the load on the water blocking packing. As one of the underground buried boxes in which the lid is placed in such a waterproof structure, there is a hand hole for relay-connecting the underground buried cable or forming a lead-in start portion of the cable. However, the opening of the handhole main body must be exposed to the ground surface by burying the handhole main body in accordance with the burial depth of the underground cable. That is, it is necessary to change the burial depth of the handhole depending on the construction site, and in this case, a handhole with a constant height cannot handle it.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to raise the opening surface of a body of an underground burying box having a constant height so that the burying depth of the body of the underground burying box can be freely changed. To do so.

[0006]

DISCLOSURE OF THE INVENTION In order to solve this problem, the present invention relates to an underground installation in which the opening surface of an underground buried box main body is mounted in a stackable manner at the upper end opening thereof. A bulking joint frame for an embedded box, wherein a water-stop packing can be attached to an upper end portion of a peripheral wall on which the lid can be placed, and an outer side of the peripheral wall of the lid placed on the waterproofing packing. A water accommodating space whose upper surface opening is covered by the peripheral portion is formed, a drain hole is provided at the bottom of the space, and the water accumulated in the water accommodating space in a stacked state is drained through the drain holes. The feature is that it is possible.

When a number of bulking joint frames corresponding to the burial depth of the underground burial box body are stacked at the upper end opening of the burial box body, the opening surface of the burial box body is raised and the uppermost bulk joint box is connected. The frame can be exposed to the ground surface. As a result, the insufficient height of the underground burying box body is compensated by the bulking joint frame, and the same underground burying box body can cope with different burial depths.
Moreover, if a water blocking packing is attached to the upper end of the peripheral wall of the uppermost bulk joint frame and the lid is placed on the upper end of the peripheral wall of the uppermost joint frame, the uppermost bulk joint frame is placed. The upper surface opening of the water storage space provided outside the peripheral wall of the frame is covered by the peripheral portion of the lid body, and the water accumulated in the water storage spaces of the bulky joint frames stacked on each other is provided at the bottom thereof. Through the drain holes provided, the water successively flows into the water storage space of the lower bulkhead joint frame and is drained from the water discharge portion of the lowermost bulkhead joint frame. For this reason,
Rainwater does not collect in the water accommodating space of the uppermost connecting frame, and the waterproof packing is protected, and early deterioration is eliminated.

If a water discharge portion is provided outside the upper end of the peripheral wall of the underground buried box body, the water accumulated in the water storage space of each bulk joint frame passes through each drain hole at the bottom of the water storage space. , Flows into the water storage space of the underground buried box body and is drained from the drain hole at the bottom of the water storage space. Furthermore, if at least one set of each drain hole of the underground buried box main body and the bulk joint frame is vertically aligned and provided, the fixing bolt can be inserted into each aligned drain hole, The underground burying box body and the bulk joint frame can be integrally fixed via the fixing bolt. As a result, even if the underground burying box body tilts after the burial due to the looseness of the ground, etc., the main body and each bulk upper joint frame are tilted as a unit, so It is possible to prevent water from entering through the gap because no gap is formed between the upper joint frame or between the upper joint frames.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to Examples. FIG. 1 shows a bulky joint frame F according to the present invention.
, The handhole body B, the first and second lids L ₁ ,
FIG. ₂ is an exploded perspective view with L ₂ , FIG. 2 is a perspective view in which a part of the bulking joint frame F is broken, and FIG. 3 is a handhole body B.
FIG. 7 is a half cross-sectional view showing a state in which two bulking joint frames F are stacked in the upper surface opening of the above and the opening of the upper bulking joint frame F is closed by the first and second lids L ₁ and L ₂ . 4 is a plan view showing a state in which two bulk joint frames F are stacked on the upper surface opening of the handhole main body B, and FIG. 5 is a plan view showing the handhole main body B and two bulk joint frames F. FIG. The handhole H is composed of a deep box-shaped handhole body B having an open top surface, and first and second lids L ₁ and L ₂ for closing the top surface opening of the handhole body B. However, if the burial depth of the handhole body B is deeper than its height, in order to compensate for the shortage of the height of the handhole body B and raise the open surface of the handhole body B, The bulking joint frame F according to the invention is used.

As shown in FIGS. 1 and 5, the handhole body B is formed of an olefin-based cross-linking type thermosetting resin containing dicyclopentadiene as a main raw material, and has a deep box shape with an open upper surface. A bottom wall 2 forming a water storage space V ₁ which will be described later is formed like a flange and horizontally extends outside the peripheral wall 1 and is provided over the entire circumference. An outer peripheral wall 3 is integrally provided at an outer end portion of the bottom wall 2, and the outer peripheral wall 3 is largely extended downward from a portion of the bottom wall 2 to form an outer peripheral wall extending portion 4. There is. The peripheral wall 1 of the handhole body B is provided so as to be slightly inclined outward. The outer peripheral wall 3 is provided vertically to the upper end of the peripheral wall 1 of the handhole main body B with a certain distance. The upper end surface 3a of the outer peripheral wall 3 is slightly higher than the upper end surface 1a of the peripheral wall 1 of the handhole main body B, and is a space formed by the upper end portion of the peripheral wall 1, the outer peripheral wall 3, and the bottom wall 2. Is a water accommodating space V ₁ that also serves as a fitting groove for the bulky joint frame F. Bottom wall 2 of this water storage space V ₁
A large number of drain holes 5 are provided at predetermined intervals.

Further, at the lower end of the outer peripheral wall extending portion 4,
The rising prevention plate 6 is provided as a flange shape and is provided over the entire circumference in a state of horizontally projecting, and a predetermined distance is provided between the upper surface of the rising prevention plate 6 and the outer surface of the outer peripheral wall 3. Triangular ribs 7 are vertically provided at intervals.
Further, a large number of ribs 8 are vertically provided at predetermined intervals along the circumferential direction on a portion of the peripheral wall 1 of the handhole main body B below the floating prevention plate 6, and the peripheral wall 1 is provided. Is reinforced.

On the other hand, as shown in FIGS. 2 to 5,
The bulky joint frame F is formed of the same resin as the handhole body B, and its overall shape is a rectangular frame shape.
The cross-sectional shape is such that the lower half portion thereof can fit into the water containing space V ₁ that constitutes the handhole body B. That is, in the bulky joint frame F, the lower end portions of the inner peripheral wall 11 and the outer peripheral wall 12 having a height higher than this are connected by the bottom wall 13,
The space formed by these is a water containing space V _2, and the bottom wall 13 has a large number of drain holes 14
Is vertically aligned with the drain hole 5 provided in the bottom wall 2 of the handhole body B. As shown in FIG. 8 and FIG. 9, in the state where the lower half of the bulkhead joint frame F is fitted in the water storage space V ₁ of the handhole body B, the peripheral wall 1 of the handhole body B and the bulk joint are connected. The inner peripheral surface of the inner peripheral wall 11 of the frame F, the outer peripheral wall 3 of the handhole main body B, and the outer peripheral surfaces of the outer peripheral wall 12 of the bulky joint frame F are aligned in the vertical direction. Peripheral walls 1 inside and outside the upper frame F
Steps 1 and 12 are provided with a step portion along the thickness direction in the middle of the height direction, and the lower end surface 11 formed at each step portion
The a and 12a can contact the upper end surfaces 1a and 3a of the peripheral walls 1 and 3 of the handhole body B, respectively. Further, the shape of the upper half of the bulky joint frame F corresponds to the shape of each of the peripheral walls 1 and 3 forming the water storage space V ₁ of the handhole body B, and the upper end surface 12b of the outer peripheral wall 12 is It is formed slightly higher than the upper end surface 11b of the inner peripheral wall 11. Therefore, as shown in FIGS. 8 and 9, the two bulking joint frames F can be fitted to each other. In addition, the uppermost bulky joint frame F
A water blocking packing P ₁ having a U-shaped cross section is fitted to the upper end surface 11 b of the inner peripheral wall 11.

For this reason, as shown in FIGS. 1, 3, 5, 8 and 9, when a plurality of bulking joint frames F are used, the lowermost bulking joint frame F is , The lower half part of which is fitted into the water storage space V ₁ of the handhole main body B, and the remaining bulky joint frame F excluding the lowermost part is fitted into the lower bulky joint frame F sequentially. To be done. The drain holes 5 and 14 provided in the bottom walls 2 and 13 of the handhole body B and the bulkhead joint frame F are
Since they are all aligned with each other in the vertical direction, as shown in FIG. 9, the fixing bolts 1 are respectively attached to the drainage holes 5 and 14 at a plurality of locations (two locations in the embodiment) corresponding to the top and bottom.
5, the fixing bolt 15 inserted into each drainage hole 5, 14 and the nut 16 are screwed together, so that the handhole main body B and the plurality of bulk-up joint frames F are integrated. Be converted. In the above embodiment, the drain holes 5 and 14 provided on the bottom walls 2 and 13 of the handhole main body B and the bulkhead joint frame F are all aligned in the vertical direction, but at least one set. If the positions of the drain holes 5 and 14 are aligned in the vertical direction, the handhole body F and the bulk joint frame F can be integrated by using the fixing bolt 15. In addition, in the above embodiment, the lower half of the lowermost bulky joint frame B is the handhole body B.
In a state where the water accommodating space is fitted to V _1, the water accommodating space V ₁ of the hand hole body B, although almost gone, or the depth of the water accommodating space V _1, or relatively The original water storage space V ₁ can be left in the handhole body B by making the fitting portion of the lower half of the bulky joint frame F shallow.

As described above, the handhole body B and the bulking joint frame F are made of the above resin to reduce the weight thereof, but the first and second lids L ₁ and L _{2 are used.} Are made of cast iron. As shown in FIGS. 1, 3 and 8, the first lid L ₁ is placed on the upper end surface 11b of the inner peripheral wall 11 of the uppermost bulk joint frame F, and the outer peripheral wall 12 thereof is It is to be fitted with a slight gap inside, and at the center of a rectangular frame plate 21 that is slightly smaller than the bulky joint frame F,
Two ring bodies 22 and 23 having different heights and diameters are concentrically provided, and the inner ring body 22 is a peripheral wall of a circular opening 24. That is, the inner ring body 22 is formed to be lower than the outer ring body 23 by almost the thickness of the second lid body L ₂ described later, and the annular gap between the ring bodies 22 and 23 is It is a fitted groove 25 into which the two lids L ₂ are fitted. In addition, the second lid L ₂
Has a fitting ring 26 provided on the periphery of the lower surface thereof, and the fitting ring 26 is fitted into the fitted groove 25 of the first lid L ₁ .

In order to connect or retract the underground cable by using the handhole main body B whose opening surface is raised by the bulking joint frame F according to the present invention, the following procedure is performed. Done. First, at the upper end opening of the handhole body B, a plurality of stacking frames F corresponding to the raised height are stacked and attached. That is, FIG. 3 and FIG.
And as shown in FIG. 9, the hand-hole body in water accommodating space V ₁ a lower half of the lower bulk on Tsugiwaku F fitted in B, additional water accommodating space V ₂ bulk on Tsugiwaku F of the lower The lower half part of the upper joint frame F of the upper stage is fitted to the bottom wall 2 and 13 of the water containing spaces V ₁ and V ₂ , and the upper and lower parts of the upper and lower joint frames F are fitted to each other (2 in the embodiment). The fixing bolt 15 is inserted into each of the drainage holes 5 and 14 at (location), the fixing bolt 15 and the nut 16 are screwed together, and the handhole main body B and the plurality of bulkhead frames F are integrated. Let

Further, as shown in FIGS. 1 and 7, the handhole body B is provided by using an appropriate punching tool (not shown).
A through hole 31 for connecting the electric wire tube 33 is formed at a predetermined position of the peripheral wall 1 in advance. Next, as shown in FIGS. 6 and 7, the installation portion of the handhole main body B is excavated to form a buried hole, and the handhole main body B is kept horizontal on the stone stones 32 laid at the bottom thereof. Then, one end of the conduit tube 33 buried in the ground is connected to the peripheral wall 1 of the handhole main body B at the portion of the through hole 31. As described above, when the plurality of bulking joint frames F are stacked and integrally attached to the upper end opening of the handhole main body B, the opening of the handhole main body B is raised, and the handhole main body B is installed in the buried hole. The uppermost bulky joint frame F can be exposed to the ground surface.

Next, the water accommodating space V of the uppermost joint frame F at the uppermost stage
The first is fitted a lid L ₁ to ₂ parts, the first lid L ₁
When the fitting ring 26 of the second lid L ₂ is fitted into the fitted groove 25 of the second lid L ₂ , the two openings L (L ₁ and L ₂₎ make the opening 9 ( (See FIG. 1) is closed. As shown in FIG. 8, the first lid L
_At the upper end of the ring body 22 on the inside of ₁ , the waterproof packing P
₂ is attached, and the back surface peripheral portion of the second lid L ₂ is brought into contact with the water blocking packing P ₂ so that the portion is water stopped. After that, the excavated earth and sand are backfilled, and the entire handhole main body B and bulk joint frame F are buried in the soil. As a result, as shown in FIGS. 6 and 7, the handhole body B and the electric wire tube 33 are connected to each other in a state of being buried in the ground. In the example of FIG. 6, the other end of the conduit 33 is connected to the wall of the underground pit 34, and the cable C is drawn from the underground pit 34 into the handhole H.

In the upper bulk joint frame F, the inner peripheral surface of the outer peripheral wall 12 of the bulk joint frame F and the first lid L ₁
From the gap 35 between the outer end surface of the frame plate 21 of the
_Although water enters the inside of the space V ₂ , the bottom wall 13 of the space V ₂ is provided with a large number of drain holes 14, so that the water entering the space V ₂ passes through the drain holes 14 and flows to the lower stage. Bulking frame F
Is dropped and stored in the water storage space V ₂ . In the lower bulking joint frame F, the drain holes 14 are provided in the bottom wall 13 of the water containing space V _{2 and} the bottom wall ₂ of the water containing space V ₁ of the handhole body B. Since the drain holes 5 are aligned with each other, the water dropped and stored in the lower bulking joint frame F is discharged to the outside through the drain holes 5 and 14. Moreover, the water blocking packing P ₁ is attached to the upper end portion of the inner peripheral wall 11 of the upper bulkhead frame F, and the frame plate 21 of the first lid L ₁ is connected to the upper layer via the water blocking packing P _1. The bulky frame F
Since it is in contact with the upper end surface 11b of the inner peripheral wall 11, the water does not enter the handhole body B from the water containing space V ₁ side.

As described above, the water containing space V of the bulky joint frame F
₂ has a structure in which water does not collect, so the load on the water blocking packing P ₁ is also small, and the handhole body B
Infiltration of water into the inside is effectively prevented. Therefore, the cable C in the handhole body B is protected. In this way, the water accommodating space V ₂ for temporarily storing underground water is provided at the outer peripheral portion of the bulking joint frame F for raising the opening of the handhole main body B to be buried in the ground. By attaching the water blocking packing P ₁ to a portion adjacent to the space V ₂ , in the structure in which the packing P ₁ does not directly contact the earth and sand, the water stored in the water accommodating space V ₂ is the space V ₂ Since the water is drained through the drain hole 14 provided at the bottom of the packing, it is possible to prevent early deterioration of the packing P ₁ .

Further, in the above embodiment, two bulk-up joint frames F are used.
This is an example of raising the opening of the handhole body B by using, but the number of the bulking joint frames F to be used is appropriately selected in accordance with the insufficient height when the handhole body B is buried. It When it is not necessary to raise the opening of the handhole body B, as shown in FIG.
The upper end opening of the handhole body B may be directly closed by the first and second lids L ₁ and L ₂ .

Further, in the above embodiment, in order to attach the lowermost bulking joint frame F to the upper opening of the handhole body B,
The lower half of the handhole main body B is fitted into the water storage space V ₁ of the handhole main body B by utilizing the water storage space V ₁ provided on the outer peripheral portion of the upper end of the handhole main body B. The mounting means may have any configuration. Further, in the above-described embodiment, the water discharge portion is constituted by the drain hole 5 provided at the bottom of the water storage space V ₁ of the handhole main body B, but the structure of this water discharge portion is also directly above. Any material may be used as long as it can discharge the water flowing from the upper frame.

Further, the bulk joint frame F according to the present invention and the handhole main body B to which the joint frame F is attached in a stacked state at the upper end opening are made of resin as a whole and are lightweight. However, in the state where the handhole body B is buried in the ground, the uplift prevention plate 6 is largely protruded in the horizontal direction on the outer side of the peripheral wall 1 thereof, and acts as an undercut when the handhole body B is buried. The lifting of the lightweight handhole body B is effectively prevented by the earth and sand above the lifting prevention plate 6.

Although the above embodiment is an example in which the bulking joint frame according to the present invention is used for the handhole body, it can also be used for a large manhole body.

[0024]

EFFECTS OF THE INVENTION By using the bulking frame for the underground burying box according to the present invention, it is possible to compensate for the insufficient height of the underground burying box main body, and the same underground burying box main body can be used for different burial. The opening of the underground buried box body can be exposed to the ground surface according to the depth. Further, since a water storage space is formed on the outer side of the peripheral wall of the bulking joint frame according to the present invention, the water that has entered the space is drained from the drain hole at the bottom thereof,
The water blocking packing mounted on the upper end of the inner peripheral wall of the water containing space is protected, and its early deterioration is prevented.

Further, if at least one set of the drainage holes of the underground buried box body and the bulk joint frame is vertically aligned and provided, the fixing bolts can be inserted into the drainage holes and fixed. Since the underground burying box body and the bulk joint frame can be integrally fixed via bolts, even if the underground burying box body tilts after burying due to looseness of the ground, etc. Since the respective bulk-up joint frames are integrally inclined, no gap is formed between the main body and the bulk-up joint frames, or between the bulk-up joint frames, and water intrudes through the gaps. Can be prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a bulking joint frame F, a handhole body B, and first and second lids L ₁ and L _{2 according} to the present invention.

FIG. 2 is a perspective view in which a part of the bulking joint frame F is cut away.

[FIG. 3] Two bulking joint frames F are stacked on the upper surface opening of the handhole main body B, and the openings of the upper bulking joint frame F are closed by the first and second lids L ₁ and L ₂ . It is a half cross-sectional view of the state.

FIG. 4 is a plan view showing a state in which two bulking joint frames F are stacked in an upper surface opening of a handhole body B.

FIG. 5 is an exploded perspective view of a handhole body B and two bulk-up joint frames F.

FIG. 6 is a cross-sectional view of a use state of a handhole body B whose opening is raised by a bulking joint frame F.

FIG. 7 is an enlarged view of a portion of the handhole body B of FIG.

FIG. 8 is an enlarged view of a stacking portion of the bulking joint frame F of FIG.

FIG. 9 is an enlarged cross-sectional view of a portion where the two bulking joint frames F and the handhole body B are integrated via the fixing bolt 15.

FIG. 10 is a cross-sectional view showing a state in which the handhole body B is embedded alone.

FIG. 11 is a partial cross-sectional view of a conventional structure in which an upper surface opening of an underground buried box body is closed by a lid in a water-stopped state.

[Explanation of symbols]

B: Handhole main body (underground buried box main body) F: Bulk-up joint frame L ₁ : First lid (lid) L ₂ : Second lid (lid) P ₁ : Water-stop packing V ₁ : Hand Water accommodating space V _{2 of the} hole main body: Water accommodating space of the bulkhead joint frame 1: Perimeter wall 5 of the handhole main body: Drain hole 9 of the handhole main body: Opening 11 of the handhole main body: Inner peripheral wall 12 of the bulk joint frame: Outer wall 14 of the bulk joint frame: drainage holes 15 of the bulk joint frame: fixing bolts

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02G 9/10 E02D 29/00

Claims (3)

(57) [Claims] 1. A bulk joint frame for an underground buried box, which is mounted in a stackable manner on the opening at the upper end of the underground buried box body so as to raise the opening surface of the body, and a lid is mounted on the frame. A water blocking packing can be attached to an upper end of a peripheral wall that can be placed, and a water storage space whose upper surface opening is covered by a peripheral edge portion of a lid placed on the peripheral wall is formed outside the peripheral wall. , Drainage holes are provided at the bottom of the space, and the water accumulated in the water containing space in a state of being stacked on top of each other,
A bulk joint frame for an underground buried box, which is capable of being drained through each of the drain holes. 2. The water drained from the drainage hole of the submerged joint frame in the state where the bulk joint frame is attached to the upper opening of the submerged submerged box body is the water provided in the subterranean buried box body. The bulking joint frame for the underground buried box according to claim 1, wherein the bulking joint frame is configured to be drained from the discharge part. 3. At least one set of the drainage holes of the underground buried box body and the bulk joint frame is provided so as to be vertically aligned.
The bulk joint for an underground buried box according to claim 2, wherein a fixing bolt is inserted into each of the drain holes so that the underground buried box main body and the bulk joint frame can be fixed to each other. frame.