JP2009007757A - Casing for underground structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a casing for an underground structure which reduces manufacturing cost and enables rapid and easy installation work. <P>SOLUTION: This casing comprises an outer cylinder 12 the inner peripheral surface of which has a female screw 12a, an inner cylinder 13 the outer peripheral surface of which has a male screw 13a screwed into the female screw 12a and which is mounted to the outer cylinder 12 in a height-adjustable manner, and a positioning means for positioning the inner cylinder 13 which is mounted to the outer cylinder 12. The positioning means comprises a groove 14a which is axially formed at the female screw 12a of the outer cylinder 12, a radially-movable pushing member which has a screw screwed into one screw hole formed at the peripheral wall of the inner cylinder 13, and a positioning member 14g which is detachably engaged into at least one engaging hole 14f formed in a position of the male screw 13a of the peripheral wall of the inner cylinder 13. The pushing member is moved radially outward so as to be pressed against the outer cylinder 12. Thus, the positioning member 14g engaged with the engaging hole 14f abuts on the groove 14a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an underground structure housing, and more particularly to a tubular underground structure housing that enables an embedded object (for example, a gate valve of a water pipe) embedded in the ground to be operated from the ground.

  The water pipes buried under the road are provided with a gate valve at predetermined intervals, and a cylindrical underground structure housing is provided at the installation location of the gate valve so that the gate valve can be opened and closed from the ground. It is buried in the road. The underground structure housing includes a lid, and is embedded in the road so that the lid is at the same height as the road surface.

  As a housing for this underground structure, Patent Document 1 discloses an outer cylinder body having an internal thread portion on an inner peripheral surface, an inner cylinder body having an external thread portion mating with the female screw portion on an outer peripheral surface, Positioning means for positioning the inner cylinder mounted on the cylinder, adjusting the vertical height by turning the inner cylinder, and fixing the height of the inner cylinder by the positioning means is disclosed. .

  In the underground structure housing of Patent Document 1, the positioning means includes a window portion formed at the position of the male screw portion on the peripheral wall of the inner cylinder and a pair of positions formed at the upper and lower positions of each window portion on the inner surface of the peripheral wall. It has a configuration including a projecting piece, a bolt inserted into a hole formed in a pair of upper and lower projecting pieces, and a swinging piece having a screw hole that is screwed into the bolt, at a central angle equal to the peripheral wall of the inner cylindrical body Plural sets (for example, 3 sets at 120 °) are arranged. When positioning the inner cylinder body, each swing piece is swung to protrude from the window portion toward the outer cylinder body, and each swivel piece is raised by rotating each bolt to raise each swing piece. The internal thread portion of the outer cylinder is sandwiched between the portions.

Further, another positioning means in Patent Document 1 is formed on a concave portion formed at the position of the male screw portion on the peripheral wall of the inner cylindrical body, a projecting piece provided on the concave portion so as to be slidable up and down, and a rear wall of the concave portion. A bolt that is screwed into the screw hole, and a triangular block that is pivotally attached to the tip of the bolt disposed inside the recess, and the inner end of the protruding piece has an inclined surface that is inclined upward as it goes inward. The triangular block has a sliding contact surface that is in sliding contact with the inclined surface of the protruding piece. When positioning the inner cylinder, turn the bolt to move the triangle block to the protruding piece side, the sliding contact surface of the triangular block pushes up the inclined surface of the protruding piece, so that the protruding piece and the male screw part The female thread portion of the outer cylinder is sandwiched. A plurality of positioning means are also arranged in the circumferential direction.
JP 2003-129503 A

  In the case for the underground structure of Patent Document 1, (1) it is necessary to arrange at least three positioning means consisting of many components, and the manufacturing cost increases accordingly. (2) All positioning means are bolts. Since the projecting piece is fixed by tightening, if the bolt is loosened due to an earthquake or car vibration, the projecting piece becomes free, and the inner cylinder may move in the rotational direction and the height of the housing may fluctuate. (3) Since the positioning means is configured to sandwich the female threaded portion of the outer cylindrical body between the projecting piece and the male threaded portion, the function of suppressing the shakiness in the radial direction of the inner cylindrical body relative to the outer cylindrical body is sufficient. Rather, the inner cylinder may rattle due to vibration, which may cause a gap between the inner cylinder and the ground. (4) It is necessary to tighten the bolts of each positioning means during positioning. Quick to work with tools in the cylinder It can not be carried out in, (5) At the time of positioning there is room to improve the point that it becomes a burden on the operator because it is forced to work with hesitation posture.

  This invention is made in view of such a subject, and provides the housing | casing for underground structures which can reduce manufacturing cost and can perform installation work quickly and easily.

  Thus, according to the present invention, the outer cylindrical body having the female threaded portion on the inner peripheral surface and the male threaded portion screwed to the female threaded portion are mounted on the outer cylindrical body so that the height can be adjusted. And a positioning means for positioning the inner cylinder mounted on the outer cylinder, and the positioning means includes a groove formed in the axial direction on the female thread portion of the outer cylinder. A pressing member that has a screw portion that is screwed into a single screw hole formed in the peripheral wall of the inner cylindrical body and is movable in the radial direction; and a male screw portion in the peripheral wall of the inner cylindrical body. A positioning member that is detachably engaged with at least one engagement hole, and is engaged with the engagement hole by moving the pressing member radially outward and pressing the outer cylinder body. A ground configured to restrict the radial and circumferential movement of the inner cylindrical body by bringing the positioning member into contact with the groove. Structures for housing is provided.

The present invention has the following effects.
(A) Since the positioning means has a simple configuration, the manufacturing cost of the housing can be reduced.
(B) Since the positioning means is configured to fit the positioning block engaged with the engagement hole of the inner cylindrical body into the groove portion of the outer cylindrical body, even if the pressing member is loosened due to an earthquake or vibration of a car or the like. The positioning block does not come out of the groove, and the inner cylinder does not move in the rotational direction and the height of the housing does not fluctuate.
(C) Since the positioning means is configured to support the positioning of the inner cylinder while pressing the outer cylinder with the pressing member and the positioning block, and to hold the inner cylinder and the outer cylinder concentrically, Shaking of the inner cylinder relative to the outer cylinder in the radial direction can be reliably suppressed.
(D) Since the bolting operation at the time of positioning only needs to be bolted to one pressing member, the operation can be completed without taking time and the burden on the operator is reduced.

The housing for an underground structure according to the present invention has an outer cylinder body having an internal thread portion on an inner peripheral surface and an external thread portion that is screwed with the female screw portion on the outer peripheral surface so that the height can be adjusted. An inner cylinder mounted on the body and positioning means for positioning the inner cylinder mounted on the outer cylinder, and the positioning means is formed in the axial direction in the female thread portion of the outer cylinder. A groove portion, a pressing member that has a screw portion that is screwed into one screw hole formed on the peripheral wall of the inner cylinder, and is movable in the radial direction; and a position of the male screw portion on the peripheral wall of the inner cylinder A positioning member that detachably engages with the formed at least one engagement hole, and moves the pressing member radially outward to press the outer cylinder so that the engagement hole The engaged positioning member is brought into contact with the groove to restrict the radial movement and the circumferential movement of the inner cylinder. And wherein the door.
The present invention may further include a detachable lid that covers the upper opening of the inner cylinder.

In the underground structure casing of the present invention, the positioning means can be specifically configured as follows.
(A) One groove portion is arranged in the outer cylinder body, and one engagement hole of the inner cylinder body is arranged at a position facing the screw hole, and the outer cylinder body is attached by a pressing member screwed into the screw hole. By pressing, one positioning member engaged with one engagement hole is configured to come into contact with the groove portion of the outer cylindrical body.
(B) Two or more grooves are arranged in the outer cylinder at substantially the same central angle in the circumferential direction, and the engagement hole of the inner cylinder is one in a position facing the screw hole or in the circumferential direction with reference to the screw hole. 1 or 2 engaged with one or more engaging holes by pressing two or more outer cylinders with a pressing member screwed into the screw holes. The above positioning member is configured to abut on each groove of the outer cylinder. Specifically, (b1) two groove portions are arranged in the outer cylinder at positions facing each other at about 180 °, and one engagement hole of the inner cylinder is arranged in a position facing the screw holes. (B2) Three grooves are arranged on the outer cylinder at a position with a center angle of about 120 ° in the circumferential direction, and two engagement holes of the inner cylinder are arranged at a position with a center angle of about 120 ° in the circumferential direction with reference to the screw hole. To do.

In the present invention, the positioning member may be a block formed into a shape that is dropped and engaged so as to straddle the lower edge of the opening of the engagement hole and protrudes outward in the radial direction from the male screw portion. it can. In other words, the positioning member has a U-shaped, U-shaped, J-shape having a bent piece portion caught in the engagement hole and an abutting piece portion connected to the bent piece portion so as to be able to contact the groove portion. It is composed of blocks of shape, L shape, etc., and the thickness of the abutting piece portion of the block engaged with the engagement hole is made thicker than the height of the crest portion of the male screw portion.
If the positioning member is configured in this way, the block can be easily and quickly attached to and removed from the engagement hole, and the male screw portion positioned on the opposite side when the outer cylinder is pressed by the pressing member. Since the contact piece of the block comes into contact with the bottom of the groove of the outer cylinder before the top of the crest hits the bottom of the valley of the female screw part, the axial center of the inner cylinder is almost aligned with the axial center of the outer cylinder. Can be matched. In addition, although the outer surface which contact | abuts the groove part 14a of the contact piece part 214 may be a plane, it is preferable to make it a convex curve so that the bottom face (inner wall surface of the outer cylinder 12) of the groove part 14a may be met.

Further, in the positioning means, the screw hole is formed on the back wall of the concave portion in which the height position of the male screw portion in the peripheral wall of the inner cylindrical body is depressed to the axial center side, and the pressing member is a screw that is screwed into the screw hole. And a contact member attached to the tip of the bolt member protruding into the inside of the recess, and the tip of the contact member is disposed at the position of the mountain portion of the male thread portion of the inner cylinder A configuration may be adopted.
If comprised in this way, an abutting member can be reliably made to contact | abut to the valley | bottom part bottom face or a groove part bottom face, without contacting the peak part of the internal thread part of an outer cylinder, and can be pressed in the stable state. Further, when the height is adjusted by turning the inner cylinder, the contact member is not caught by the female thread portion of the outer cylinder, and the inner cylinder can be smoothly turned.

The present invention may further include attachment means for attaching the positioning member to the inner surface of the inner wall of the inner cylinder so as to be detachable from the engagement hole.
In this way, since the positioning member is always connected to the inner cylinder by the mounting means, it is not necessary to prepare a positioning member separately when burying the underground structure housing, and the positioning member is engaged. It is possible to prevent accidental dropping into the buried hole when engaging with the joint hole.
The attachment means may have a connecting rod in the axial direction attached in the vicinity of the engagement hole on the inner surface of the peripheral wall of the inner cylinder. In this case, a connecting piece having an insertion hole may be connected to the bent piece portion of the block that is a positioning member, and the connecting rod may be inserted into the insertion hole of the connecting piece to connect the blocks. A chain may be used instead of the connecting rod.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiment.

(Embodiment 1)
FIG. 1 is a view for explaining a use state of Embodiment 1 of the underground structure casing of the present invention. The underground structure housing (hereinafter abbreviated as a housing) C1 is buried, for example, above the gate valve 2 of the water pipe 1 buried in the ground together with a predetermined number of connecting pipes 3a to 3e and the like. Is. The height is adjusted by a predetermined number of connecting pipes 3a to 3e at a certain height from the depth of the gate valve 2, and the casing C1 of the present invention is used from the uppermost connecting pipe 3a to the ground G. The height of the housing C1 is adjusted so that the upper surface of the head 11 coincides with the ground G.

FIG. 2 is a front sectional view of the casing of the first embodiment, FIG. 3 is a side sectional view of the casing of the first embodiment, and FIG. 4 is a schematic bottom sectional view of the casing of the first embodiment.
The casing C1 has the lid 11 and a female screw portion 12a formed on the inner peripheral surface in almost the entire height range, and a flange 12b connected to the uppermost joint pipe 3a and bolts and nuts on the outer peripheral surface. An outer cylindrical body 12 having a male threaded portion 13a threadedly engaged with the female threaded portion 12a at the lower portion of the outer peripheral surface, the inner cylindrical body 13 being mounted on the outer cylindrical body 12 so that the height can be adjusted, and the outer cylinder Positioning means for positioning the inner cylindrical body 13 attached to the body 12.

The outer cylindrical body 12 has an inner diameter of the peripheral wall of about 100 to 600 mm, a height of about 100 to 300 mm, and a height of a crest of the female screw portion 12a from the inner peripheral surface of the peripheral wall is about 2 to 12 mm. The inner cylindrical body 13 has an outer diameter of about 50 to 550 mm and a height of about 150 to 400 mm, and the height of the crest of the male screw portion 13a from the outer peripheral surface of the peripheral wall is equal to that of the female screw portion 12a.
By turning the inner cylinder 13 attached to the outer cylinder 12, the height can be adjusted between the longest state shown in FIGS. 2 and 3 and the shortest state shown in FIG. The height L1 from the upper end surface of the inner cylinder 13 that coincides with the upper surface of the lid 11 to the lower surface of the flange 12b of the outer cylinder 12 is about 200 to 350 mm, and the height L2 in the shortest state is 150 to 350 mm. Since it is about 200 mm, height adjustment can be performed in the range of about 0 to 300 mm. In addition, after adjusting the height and positioning the inner cylinder body 13 by a positioning means described later, the packing ring 15 is fitted into the gap between the inner cylinder body 13 and the outer cylinder body 1, so that the earth and sand are gaps when buried. You are prevented from entering.

Hereinafter, the positioning means will be mainly described.
As a component of the positioning means, the female screw portion 12a is formed with three groove portions 14a extending in the axial direction (regions where the female screw portion 12a is not formed) at intervals of about 120 ° in the circumferential direction. . The groove portion 14a is formed over almost the entire range in the axial direction of the female screw portion 12a, and the groove width W in the circumferential direction is about 1 to 110 mm.

  Further, as a component of the positioning means, at the height position having the male screw portion 13a on the peripheral wall, the male screw portion 13a is not formed, but a concave portion 14b that is recessed inward (axial side) is formed. A screw hole 14c is formed in the inner wall of the recess 14b, and a pressing member P is attached to the screw hole 14c.

  The pressing member P includes a bolt member 14d that is screwed into the screw hole 14c, a bolt member 14d, and a U-shaped contact member 14e that is pivotally attached to the tip of the bolt member 14d that protrudes into the recess 14b. It has. A pair of opposing tip portions of the abutting member 14e are arranged at a pitch of 2 pitches at the position of the crest of the male screw portion 13a of the inner cylinder 13.

Further, as one component of the positioning means, as shown in FIGS. 3, 4, 6 and 7, the inner cylinder 13 has a circumferential position with the male hole 13a on the peripheral wall at the height position and the screw hole 14c as a reference. Two rectangular engagement holes 14f are formed at a central angle of about 120 ° in the direction, and a positioning block 14g having a J-shaped cross section is fitted into each engagement hole 14f.
The positioning block 14g includes a bent piece 114 that is bent at a right angle and is hooked on the lower edge of the engagement hole 14f, and an abutting piece 214 that is connected to the bent piece 114. The thickness t of the contact piece 214 of the positioning block 14g is about 1 to 15 mm, and is set to be thicker than the height of the mountain portion of the male screw portion 13a. The width w of the contact piece 214 is 0.5 to 100 mm, and is set slightly smaller (for example, about 0.5 to 10 mm) than the groove width W of the groove 14a.
In FIG. 4, the male screw portion of the inner cylindrical body 13 that is screwed with the female screw portion 12 a of the outer cylindrical body 12 is not shown.

  When adjusting the height of the casing C1 configured as described above, the position of each engagement hole 14f of the inner cylinder 13 is set to each groove of the outer cylinder 12 while rotating the inner cylinder 13 to a desired height. It is made to correspond to the position of 14a. At this time, since the operator can look into the inner peripheral surface of the outer cylindrical body 12 from the engagement hole 14f, it can be easily confirmed visually whether the engagement hole 14f and the groove portion 14a match.

  Thereafter, the positioning block 14g is fitted in each engagement hole 14f, and the bolt member 14d of the pressing member P is firmly tightened by using a tool to press the abutting member 14e against the bottom surface (inner surface of the peripheral wall) of the groove portion 14a. The body 13 presses each positioning block 14g toward the outer cylinder 12, and the contact piece 214 of each positioning block 14g is pressed against the bottom surface of the groove 14a. At this time, the tightening operation of the bolt member 14d using a tool only needs to be performed in one place, so that the operation can be completed without taking time and effort.

  The screwed state between the female threaded portion 12a of the outer cylindrical body 12 and the male threaded portion 13a of the inner cylindrical body 13 has a margin of slight shakiness, but the contact piece 214 of the positioning block 14g has a margin. Since the thickness t is thicker than the height of the crest of the male screw portion 13a (and the female screw portion 12a), the positioning block is positioned before the top of the crest of the male screw portion 13a hits the back of the valley of the female screw portion 12a. 14g hits the bottom surface of the groove 14a. Therefore, as shown in FIGS. 4 and 7, the inner cylinder 13 is positioned at three points of the contact member 14e and the two positioning blocks 14g. In this positioning state, the axis of the inner cylinder 13 is the outer cylinder. It almost coincides with the twelve axes. Further, after the casing C1 is buried, even if the bolt member 14d is loosened due to an earthquake or a vibration caused by a vehicle or the like, each positioning block 14g is fitted in each groove 14a, and the positioning block 14g is attached to the end of the female screw portion 12a. Since the contact is stopped, the rotational movement of the inner cylinder 12 due to vibration is reliably prevented, and the height of the casing C1 does not vary.

(Embodiment 2)
FIG. 8 is a view showing a state in which a part of the peripheral wall of the inner cylindrical body in Embodiment 2 of the underground structure casing of the present invention is cut away. The housing of the second embodiment is further provided with attachment means 25 for attaching the positioning block 24g to the engagement hole 14f so as to be able to be engaged with and disengaged from the inner peripheral surface of the inner cylinder 13, and the positioning block 24g is provided in advance. The configuration is the same as that of the first embodiment except that the cylindrical body 13 is attached. In FIG. 8, the same components as those in the first embodiment are denoted by the same reference numerals.

Hereinafter, differences of the second embodiment from the first embodiment will be mainly described.
The attachment means 25 is inserted into a pair of opposed projecting pieces 25a formed in the vicinity of the upper and lower opening edges of the engagement hole 14f on the inner surface of the inner wall of the inner cylindrical body 13, and an axial hole formed in each projecting piece 25a. A bolt 25b serving as a connecting rod is provided, and a nut 25c that is screwed into a threaded portion at the tip of the bolt 25b inserted through the hole of each protruding piece 25a to prevent the bolt 25a from coming off. On the other hand, the positioning block 24g is substantially the same as the positioning block 14g of the first embodiment, but further includes a connecting piece 25d connected to the bent piece, and an insertion hole formed in the connecting piece 25d. The bolt 25a is inserted into the shaft 25 so as to be slidable in the axial direction and rotatable around the bolt 25a.

According to the second embodiment, when the inner cylindrical body 13 is rotated with respect to the outer cylindrical body, the positioning block 24g is in a state of being suspended by the bolt 25b inside the inner cylindrical body 13, and the engaging hole 14 is When positioning the inner cylinder 13 in alignment with the groove of the outer cylinder, the positioning block 24g is lifted and rotated to pass through the engagement hole 14f, and the positioning block 24 is dropped as it is, below the opening of the engagement hole 14f. Engage with the edge.
By providing such attachment means 25, the positioning block 24g is not dropped and lost in the embedded hole of the housing. Further, it is not necessary to prepare the positioning block 24g as a separate member.

(Other embodiments)
In the first and second embodiments, the configuration using three grooves, two engagement holes, and two positioning blocks is illustrated, but two grooves at one or the opposed position and one at the position facing the pressing member. The structure using an engagement hole and one positioning block may be sufficient.

It is a figure explaining the use condition of Embodiment 1 of the housing | casing for underground structures of this invention. FIG. 3 is a front sectional view of the housing according to the first embodiment. FIG. 3 is a side sectional view of the housing according to the first embodiment. FIG. 3 is a schematic bottom cross-sectional view of the housing of the first embodiment. FIG. 3 is a front cross-sectional view showing the shortest state of the housing of the first embodiment. It is a figure which shows the state which notched a part of surrounding wall of the inner cylinder in the housing | casing of Embodiment 1. FIG. FIG. 3 is a partially omitted cross-sectional view showing a positioning state in the housing of the first embodiment. It is a figure which shows the state which notched a part of surrounding wall of the inner cylinder in Embodiment 2 of the housing | casing for underground structures of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Cover body 12 Outer cylinder body 12a Female thread part 13 Inner cylinder body 13a Male thread part 14a Groove part 14b Recessed part 14c Screw hole 14d Bolt member 14e Contact member 14f Engagement hole 14g, 24g Positioning block (positioning member)
15 packing ring 25 mounting means 25b bolt 25d connecting piece 114 bent piece portion 214 abutting piece portion P pressing member t thickness W groove width w width

Claims (7)

An outer cylinder having a female threaded portion on the inner peripheral surface, an inner cylindrical body that has a male threaded portion that is screwed to the female screw portion on the outer peripheral surface, and is attached to the outer cylindrical body so that the height can be adjusted; Positioning means for positioning the inner cylinder mounted on the outer cylinder,
The positioning means has a groove portion formed in the axial direction in the female screw portion of the outer cylindrical body and a screw portion that is screwed into one screw hole formed in the peripheral wall of the inner cylindrical body in the radial direction. A movable pressing member, and a positioning member that is detachably engaged with at least one engaging hole formed at the position of the male screw portion on the peripheral wall of the inner cylindrical body, and the pressing member is radially outward. The positioning member engaged with the engagement hole is brought into contact with the groove portion by being moved toward the outer side and pressed against the outer cylindrical body, thereby restricting movement of the inner cylindrical body in the radial direction and the circumferential direction. An enclosure for underground structures characterized by being made. In the positioning means, one or more of the groove portions are arranged at a central angle substantially equal to the circumferential direction, and the engagement hole is located at a position facing the screw hole or substantially in the circumferential direction with respect to the screw hole. Two or more are arranged at equal center angles,
By pressing the outer cylinder with the pressing member screwed into the screw hole, the one or two or more positioning members engaged with the one or more engagement holes are groove portions of the outer cylinder. The housing for an underground structure according to claim 1, wherein the housing is configured to abut against the housing.   3. The block according to claim 1, wherein the positioning member is a block that is dropped and engaged so as to straddle the lower opening edge of the engagement hole and that protrudes radially outward from the male screw portion. The housing for underground structures as described in 1.   The housing for an underground structure according to any one of claims 1 to 3, further comprising attachment means for attaching the positioning member to the inner surface of the inner wall so that the positioning member can be engaged with and disengaged from the engagement hole. The connecting means has an axial connecting rod attached in the vicinity of the engagement hole in the inner surface of the peripheral wall of the inner cylinder,
The block has a bent piece portion that is caught in the engagement hole, a contact piece portion that is connected to the bent piece portion so as to be able to come into contact with the groove portion, and an insertion hole through which the connecting rod is inserted. The housing for underground structures according to claim 4, further comprising a connecting piece provided continuously with the bent piece. The screw hole is formed in the back wall of the recess in which the height position of the male screw portion in the peripheral wall of the inner cylindrical body is recessed to the axial center side,
The pressing member includes a bolt member that constitutes a screw portion that is screwed into the screw hole, and a contact member that is attached to the tip of the bolt member that protrudes into the recess, and the tip of the corresponding contact member The casing for an underground structure according to any one of claims 1 to 5, wherein is disposed at a position of a mountain portion of the male screw portion of the inner cylindrical body.   The underground structure housing according to any one of claims 1 to 6, further comprising a detachable lid that covers the upper opening of the inner cylinder.

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