JP7178084B2 - Buried box - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried box installed underground for protection, maintenance and inspection of underground facilities such as water and gas control valves.

Attached pipes for supplying water, gas, electricity, etc. are buried underground. Control valves such as water control valves, connectors, breakers, etc., are appropriately connected to these attached pipes. must be specified. For this purpose, a hollow structure buried box is installed in the ground. A similar buried box is also set for manholes.

A receiving frame for fitting and supporting the iron lid so as to be openable and closable is provided at the upper end opening of the embedded housing. This receiving frame may be provided integrally with the embedded housing or may be formed of a separate member. The iron cover is supported in a fitted state (closed state) in the opening of the receiving frame so that the upper surface thereof is substantially flush with the ground surface (road surface, etc.). The iron cover is attached to the receiving frame so as to be openable and closable via hinges, connecting rods, chains, or the like.

As a buried box of this type, generally, a hollow cylindrical lower part that forms a storage space for control valves etc. is supported on a seat embedded near underground facilities such as control valves (water control valves, etc.). Equipped with a main body and a hollow cylindrical upper body having a receiving frame for fitting and supporting an iron lid at the upper end, and by screwing the upper body to the lower body, the height can be adjusted. are used.

Further, for example, Patent Document 1 by the present applicant discloses an external body having a female threaded portion formed on its inner peripheral surface, a rotating body having a male threaded portion threadedly engaged with the female threaded portion on its outer peripheral surface, and a rotating pair. An embedded box is disclosed that includes an upper body that is placed on the upper surface of the body so as to be relatively rotatable, and detent means that non-rotatably connects the rotatable body and the upper body. According to such a technique, by releasing the connection by the anti-rotation means and rotating the rotating main body independently of the upper main body inside the outer main body, there is no turning resistance due to earth pressure. It is possible to adjust the vertical position (raising, lowering) of the upper body (iron lid).

JP-A-10-292409

However, since the upper body is also subject to resistance from earth pressure when moving in the vertical direction, when the connection by the anti-rotation means is released as in the technique disclosed in the above-mentioned Patent Document 1, the upper body is particularly lowered. When adjusting, it may be difficult to cause the upper body to follow the downward movement of the rotating body.

In this case, every time the rotating body is rotated and moved by a predetermined amount, the operator hits the upper body with a hammer or the like from above to move it to the upper surface of the rotating body, and the ground surface (road surface, etc.) There is a risk that the adjustment work will become complicated, such as the need to check the height.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a buried box which allows easy adjustment of the height of the upper body when buried in the ground.

An embedded housing according to one aspect of the present invention has a cylindrical outer body having a female threaded portion on the inner peripheral portion, and an annular flat support surface on the upper end portion, and the female threaded portion of the outer body is screwed on the outer peripheral portion. a cylindrical rotating body having a male threaded portion that can be mated with the female threaded portion and capable of moving vertically inside the outer body by rotating to change the engagement state of the male threaded portion with the female threaded portion; A cylinder having an iron lid receiving frame at the bottom, an annular sliding surface at the lower end, and the sliding surface being placed on the flat support surface so as to be relatively rotatable with the rotating body and an annular projection integrally formed on the rotating body so that the outer circumference of the lower end side coincides with the inner circumference of the flat support surface and protrudes vertically from the flat support surface. The outer peripheral surface is inclined so as to be offset to one side in the horizontal direction from the lower end side to the upper end side , and a pair of notches are provided at positions opposed to each other in the direction orthogonal to the one side. and a portion formed in the upper body, the inner circumference of the lower end side of which coincides with the inner circumference of the sliding surface, and a part of the inner circumference of the upper body which is expanded from the lower end side to the upper end side. an engagement recess formed by a tapered surface that allows the rotation body and the upper body to rotate relative to each other by engagement between the engagement protrusion and the engagement recess; It is connected so as to be vertically movable integrally with the rotating body without rotating the upper body .

In addition, an embedded mirror according to another aspect of the present invention has a cylindrical outer body having a female threaded portion on the inner peripheral portion, an annular flat support surface on the upper end portion, and the female threaded portion of the outer body on the outer peripheral portion. a cylindrical rotating body having a male threaded portion that can be engaged with a screw, and capable of moving vertically inside the outer body by rotating to change the engagement state of the male threaded portion with the female threaded portion; It has an iron lid receiving frame at the upper end and an annular sliding surface at the lower end, and the sliding surface is placed on the flat support surface so as to be rotatable relative to the rotating body. and a cylindrical upper body formed in the rotating body, the inner peripheral circle of the upper end side of which coincides with the inner peripheral circle of the flat support surface , and a part of the inner peripheral surface of the rotating body extending to the upper end. An engaging recess formed by a tapered surface that expands in diameter from the side to the lower end side, and an inner peripheral circle on the upper end side that matches the inner peripheral circle of the sliding surface and protrudes vertically from the sliding surface. The outer peripheral surface is inclined so as to be offset to one side in the horizontal direction from the upper end side to the lower end side , and faces each other in the direction perpendicular to the one side. and an engaging projection provided with a pair of cutouts at a position , wherein the rotating body and the upper body are relatively rotatable by engagement between the engaging recess and the engaging projection . and is connected so as to be vertically movable integrally with the rotating body without rotating the upper body .

According to the burial box of the present invention, it is possible to easily adjust the height of the upper main body in a state of being buried in the ground by a simple operation.

FIG. 1 is a cross-sectional view of a main part of an embedded box buried in the ground according to one embodiment of the present invention; Ditto, exploded perspective view of the embedded housing Ditto, cross-sectional view of the main parts showing the embedded housing disassembled Same as above, explanatory drawing when assembling the rotating main body and the upper main body Same as above, explanatory diagram showing the relationship between the outer peripheral surface of the engaging projection and the inner peripheral surface of the engaging recess. Same as above, cross-sectional view of main parts showing the connection state between the rotating body and the upper body Same as above, explanatory drawing when adjusting the height of the buried box buried in the ground Same as above, side view showing an example of a height adjustment jig Sectional view of main parts according to the modified example, showing the rotary main body and the upper main body in an exploded manner Same as above, cross-sectional view of main parts showing the connection state between the rotating body and the upper body

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings relate to one embodiment of the present invention, FIG. 1 is a cross-sectional view of the essential parts of an embedded chassis buried underground, FIG. 2 is an exploded perspective view of the embedded chassis, and FIG. 3 is an exploded view of the essential parts of the embedded chassis. FIG. 4 is a diagram illustrating the assembly of the rotating body and the upper body; FIG. 5 is a diagram illustrating the relationship between the outer peripheral surface of the engaging projection and the inner peripheral surface of the engaging recess; Fig. 7 is a cross-sectional view of the main part showing the state of connection between the moving main body and the upper main body; Fig. 7 is an explanatory diagram for adjusting the height of a buried box buried in the ground; Fig. 8 shows an example of a height adjusting jig. It is a side view.

A buried housing 1 shown in FIG. 1 is buried in the ground at a position surrounding buried equipment 2a such as a control valve provided in the middle of an attached pipe 2 for water supply, gas or electricity.

The embedded housing 1 comprises an outer body 5, a rotary body 6 rotatably screw-engaged inside the outer body 5, and an upper body supported by the upper end of the rotary body 6 so as to be relatively rotatable. 7 and an iron lid 8 fitted and supported by the upper body 7 .

The outer main body 5 is a cast member having a hollow, substantially cylindrical shape with open top and bottom ends, and has an axis extending in the vertical direction. A female threaded portion 11 is formed on the inner peripheral surface of the outer main body 5 .

A bolt insertion hole 12 is provided in the upper portion of the outer body 5 so as to penetrate in the radial direction, and a stopper 13 is fixed to the bolt insertion hole 12 for restricting the upward movement of the rotating body 6. It is In addition, in this embodiment, the stopper 13 is configured by a pair of bolt and nut.

A flange-like stopper 14 projecting inward is formed at the lower end of the outer body 5 as a stopper for restricting the downward movement of the rotating body 6 .

Furthermore, a flange portion 15 is formed at the lower end portion of the outer main body 5 so as to protrude outward.

When the external main body 5 configured in this way is installed in the ground, it is placed, for example, on the base 3 made of concrete or bricks near the buried equipment 2a. As a result, the external body 5 is arranged at a predetermined position surrounding the buried device 2a. In addition, it is also possible to fix the flange portion 15 of the outer body 5 to the base 3 with bolts or the like, if necessary.

The rotating body 6 is a hollow, substantially cylindrical cast member with open top and bottom ends, and has an axis extending in the vertical direction. The outer diameter of the rotating body 6 is formed to be smaller than the inner diameter of the female threaded portion 11 formed in the outer body 5 . In addition, a male threaded portion 20 is formed on the outer periphery of the rotating body 6 so as to be threadably engaged with the female threaded portion 11 of the external body 5 .

By screwing the male threaded portion 20 to the female threaded portion 11 , the rotating body 6 is rotatably supported inside the outer body 5 . Further, by rotating the rotating body 6 with respect to the external body 5, the engaging position (screwed position) of the male threaded portion 20 with respect to the female threaded portion 11 changes, so that the rotating body 6 moves vertically inside the external body 5. can be moved to

Here, for example, as shown in FIGS. 1 and 3, the rotating body 6 is provided with a pressing mechanism for inhibiting rotation with the external body 5 and fixing the rotating body 6 at a desired height position. 21 are provided.

The pressing mechanism 21 has a hollow through frame 22 having a rectangular cross-sectional shape and formed in the rotating body 6 . The hollow through frame 22 extends horizontally in the radial direction of the rotating body 6 so as to pass through the rotating body 6 and open inside the outer body 5 .

Inside the hollow through frame 22, a pressing member 23 is mounted which is movable in the radial direction of the rotating body 6 using the inner surface of the hollow through frame 22 as a guide surface. The pressing member 23 is formed with an inclined through-hole 23 a that penetrates in the vertical direction and has an inclined surface that is inclined in the radial direction of the rotating body 6 .

A block-shaped operating member 24 is slidably disposed in the inclined through hole 23a. The actuating member 24 has inner and outer radial surfaces inclined in the same radial direction as the inclined surfaces of the inclined through-holes 23a. It is possible to move in any direction.

Further, the operating member 24 is provided with a screw hole 24a penetrating vertically, and a screw member 25 rotatably supported by the hollow through frame 22 is screwed into the screw hole 24a.

In the pressing mechanism 21 configured as described above, the actuating member 24 moves vertically within the hollow through frame 22 in conjunction with the turning operation of the screw member 25 by an operator or the like. This vertical movement changes the sliding position between the inclined through-hole 23a and the operating member 24, so that the pressing member 23 comes into contact with the inner surface of the outer body 5 and rotates the rotating body 6. It can be displaced between a protruding state in which it is prohibited and a retracted state in which it is separated from the inner surface of the external body 5 and the rotation of the rotating body 6 is permitted.

A flat support surface 26 is formed on the upper end of the rotating body 6 . The flat support surface 26 is a plane for supporting the upper body 7 and is formed by an annular plane concentric with the axis of the rotating body 6 .

Furthermore, an engaging protrusion 27 for engaging with the upper body 7 is projected from the upper end of the rotating body 6 . The engagement projection 27 is an annular projection projecting from the inner peripheral side of the flat support surface 26. For example, as shown in FIGS. It has an external shape.

More specifically, the engaging convex portion 27 is set so that the outer circumference of the lower end side coincides with the inner circumference of the flat support surface 26 (that is, the outer circumference of the lower end side is on the axis of the rotating body 6). and the outer periphery of the upper end side forms a circle with a predetermined radius r1 centered at a point offset to one side from the axis of the rotating body 6. , and a substantially cylindrical protrusion with an inclined outer peripheral surface.

In other words, the engaging convex portion 27 is an annular projection formed such that the center of the outer circumference circle is gradually offset to one side from the axis of the rotating body 6 from the lower end side to the upper end side. there is

As a result, the outer circumference of the engaging projection 27 near one side is formed with a reverse gradient surface that slopes radially outward from the lower end side to the upper end side, and the outer circumference of the engaging projection 27 near the other side is formed with a lower end. A positive slope surface that slopes radially inward from the side to the upper end side is formed.

The inner peripheral surface of the engaging protrusion 27 is formed by a circular peripheral surface concentric with the axis of the rotating body 6 over the entire area from the lower end side to the upper end side.

Further, the engaging projection 27 is provided with a pair of notches 28 having a stepped shape, for example, at positions facing each other in a direction orthogonal to the above-described one side (that is, the direction in which the tip side is offset). . These notches 28 are for engaging a height adjusting jig 70 for rotating the rotating body 6 from the ground when the buried housing 1 is buried in the ground.

Here, for example, as shown in FIG. 8, the height adjustment jig 70 includes a shaft 71, a handle 72 connected to one end of the shaft 71, and a plate 73 connected to the other end of the shaft 71. configured with. An operator or the like can rotate the rotating body 6 by rotating the handle 72 in a state in which the plate 73 is engaged with the notch 28 of the engaging projection 27 . there is

A locking mechanism 30 for prohibiting relative rotation with the upper body 7 is provided inside the rotating body 6 .

The lock mechanism 30 includes an ear portion 31 provided on the upper inner surface of the rotating body 6, a bolt 32 having a base end rotatably supported in a horizontal hole penetrating the ear portion 31, It comprises a lock fitting 33 through which a bolt 32 is inserted, and a nut 34 screwed onto the tip of the bolt 32 .

The lock fitting 33 of the lock mechanism 30 can be engaged with an engagement groove 43 (described later) provided in the upper body 7 when the bolt 32 is rotated upward. By tightening the nut 34 screwed onto the bolt 32, the lock fitting 33 is pressed against the engagement groove 43, so that the lock mechanism 30 can prohibit the rotation of the rotating body 6 and the upper body 7. It has become.

The upper body 7 is a cast member having a hollow, substantially cylindrical shape with open top and bottom ends, and has an axis extending in the vertical direction. The upper body 7 has substantially the same outer shape as the rotating body 6 and is supported so as to be relatively rotatable by being placed on the flat support surface 26 of the rotating body 6 .

At the upper end of the upper main body 7, an iron lid receiving frame portion 40 is formed with a downward circumferential slope. Furthermore, a connecting portion 41 for connecting with the iron lid 8 is provided below the iron lid receiving frame portion 40 on the inner circumference of the upper body 7 .

An inward flange 42 is formed below the connecting portion 41 on the inner periphery of the upper body 7 , and an engagement groove 43 that engages with the lock fitting 33 is formed in the inward flange 42 .

A pair of ridges 44 extending linearly from the lower end to the upper end of the upper body 7 are formed on the outer peripheral surface of the upper body 7 . These ridges 44 are intended to permit vertical movement while prohibiting rotation of the upper body 7 when buried in the ground.

A sliding surface 45 is formed on the lower end of the upper body 7 so as to be slidable on the flat support surface 26 . The sliding surface 45 is formed by an annular flat surface concentric with the axis of the upper body 7 . Here, the inner diameter r1' of the sliding surface 45 is set to be slightly larger than the inner diameter r1 of the flat support surface 26. As shown in FIG.

Further, an engaging concave portion 46 that engages with the engaging convex portion 27 is formed on the inner peripheral surface of the upper body 7 . The engaging recess 46 is formed by an annular recess provided on the inner peripheral side of the sliding surface 45 .

Specifically, the engaging recess 46 is set so that the inner circumference of the lower end side coincides with the inner circumference of the sliding surface 45 (that is, the inner circumference of the lower end side is on the axis of the upper main body 7). ), and the inner peripheral circle on the upper end side is a circle with a predetermined radius r2 (r2>r1') centered on a point on the axis of the rotating body 6 The inner peripheral surface is configured by an inclined recess so as to form a

In other words, the engaging recess 46 is concentric with the axis of the upper body 7, and the inner peripheral surface is formed by a tapered surface whose inner diameter increases from r1' to r2 from the lower end side to the upper end side.

Here, the inclination angle of the tapered surface forming the inner peripheral surface of the engagement concave portion 46 is set so as to substantially match the inclination angle of the reverse slope surface formed near one side of the engagement convex portion 27. .

For example, as shown in FIG. 4, the engagement concave portion 46 of the upper body 7 configured in this way can be engaged with the engagement convex portion only when the upper body 7 is tilted to one side with respect to the rotating body 6. 27 can be engaged or disengaged.

Then, when the engaging protrusion 27 is engaged with the engaging recess 46, the inner peripheral circle at the lower end of the engaging recess 46 comes into sliding contact with the outer peripheral circle at the lower end of the engaging protrusion 27, thereby rotating. The main body 6 and the upper main body 7 are connected so as to be relatively rotatable with their axes aligned. At this time, the upper main body 7 is prevented from slipping off from the rotating main body 6 mainly by engaging the reverse slope surface of the engaging projection 27 with the tapered surface of the engaging recess 46, and the connection state is maintained. .

In this case, the amount of vertical movement of the rotating member 6 supported by the outer body 5 is restricted by the stoppers 13 and 14, so that at least a part of the lower end side of the upper body 7 (that is, The connecting portion between the rotating body 6 and the upper body 7 is set to always be positioned inside the outer body 5 . As a result, the upper body 7 is prohibited from moving in the inclined direction by the inner peripheral surface of the outer body 5 , and the separation of the engagement recess 46 from the engagement protrusion 27 is reliably prevented.

Furthermore, when used buried in the ground, the upper body 7 is prohibited from rotating relative to the rotating body 6 by the lock mechanism 30 . As a result, rattling between the rotating body 6 and the upper body 7 is prevented, and the durability of the embedded housing 1 against vibrations from the outside is ensured.

In FIG. 1, reference numeral 9 denotes a packing made of synthetic rubber or the like, and this packing 9 is attached to the upper end of the outer body 5 so as to be slidable on the outer peripheral surface of the upper body 7. . This prevents earth and sand from flowing into the outer body 5 through the gap between the upper body 7 and the outer body 5 . Here, the packing 9 of the present embodiment is formed of spheroidal graphite cast iron (FCD) or the like, and is formed of an annular base portion 55 that abuts on the upper end portion of the outer body 5 and a synthetic rubber or the like that covers the base portion 55. , and a cover portion 56 whose inner periphery is in sliding contact with the outer peripheral surface of the upper body 7 . By providing the base portion 55 inside the cover portion 56 in this manner, the durability of the packing 9 against rolling pressure is enhanced, and it becomes possible to realize stable construction when the buried box 1 is buried. ing.

The iron lid 8 is composed of a disk-shaped cast member that can be fitted to the iron lid receiving frame portion 40 of the upper body 7 . A rod-shaped connecting member 50 is pivotally connected to one side of the bottom surface of the iron cover 8 , and the connecting member 50 is connected to the connecting portion 41 . Thereby, the iron lid 8 is connected to the upper body 7 so as to be openable and closable.

A jig insertion opening 51 for inserting a jig for opening and closing the iron lid 8 is formed on the other side of the iron lid 8 . Further, a closing member 52 for closing the jig insertion opening 51 is provided on the other side of the iron lid 8 so as to be swingable. is urged in the direction of closing the jig insertion opening 51 by .

The closing member 52 provided on the iron lid 8 is displaced in a direction to open the jig insertion opening 51 by pushing a jig (not shown), and the jig inserted into the opened jig insertion opening 51 , the iron lid 8 can be opened.

For example, as shown in FIG. 3, the outer peripheral surface of the iron cover 8 is composed of two-step inclined surfaces (first and second inclined surfaces 8a and 8b) having different inclination angles.

The first sloped surface 8 a is a sloped surface for preventing rattling of the iron lid 8 by mainly fitting into the inner peripheral surface of the iron lid receiving frame portion 40 . Therefore, the slope of the first sloped surface 8a is formed with a slope equivalent to the slope of the inner peripheral surface of the iron lid receiving frame portion 40 (for example, 9 degrees).

On the other hand, the second sloped surface 8b engages with the stepped portion 40a formed below the iron lid receiving frame portion 40, thereby causing the first sloped surface 8a to bite against the inner peripheral surface of the iron lid receiving portion 40. It is a sloped surface for control to suppress crowding. Therefore, the slope of the second sloped surface 8b is formed with a sufficiently gentle slope (for example, 18 degrees) with respect to the slope of the inner peripheral surface of the iron lid receiving frame portion 40 .

By configuring the outer peripheral surface of the iron lid 8 with the two-step inclined surface in this way, the iron lid 8 is suppressed from biting into the iron lid receiving frame portion 40, and the iron lid 8 is opened with a small force. It is possible.

When assembling such an embedded housing 1, for example, as shown in FIG. That is, as described above, the engaging concave portion 46 is engaged with the engaging convex portion 27 by tilting the upper body 7 to one side with respect to the rotating body 6 .

Next, for example, as shown in FIG. 6, the engagement between the lock metal fitting 33 of the lock mechanism 30 and the engagement groove 43 prohibits relative rotation between the rotating body 6 and the upper body 7 .

Next, the rotating body 6 inserted into the outer body 5 is rotated through the upper body 7, whereby the male threaded portion 20 is threadedly engaged with the female threaded portion 11, and the rotating body 6 is rotated into the upper body. 7 is supported by the outer body 5 .

Next, a stopper 13 consisting of a bolt and a nut is fixed to the bolt insertion hole 12 of the outer body 5 to prevent the rotating body 6 from slipping off from the outer body 5 . is attached.

Next, the iron lid 8 is connected to the upper main body 7 by inserting the connecting member 50 into the connecting portion 41 of the upper main body 7 .

The buried housing 1 assembled in this way is arranged so as to surround the buried equipment 2a by placing the external body 5 on the base 3 provided inside the hole dug in the ground. By rotating the rotating body 6 with respect to the outer body 5, the height of the iron cover 8 with respect to the ground is adjusted, and after the pressing mechanism 21 fixes the rotating body 6 so that it cannot rotate, paving or the like is carried out. is buried in the ground (see Fig. 1).

When adjusting the height of the buried iron lid 8 (upper body 7), for example, as shown in FIG. 7, after the iron lid 8 is opened, the pressing mechanism 21 is released to As the rotation of the rotating body 6 with respect to the rotating body 6 is permitted, the locking mechanism 30 is released and the rotation of the upper body 7 with respect to the rotating body 6 is permitted.

Then, the plate 73 of the height adjusting jig 70 inserted into the upper body 7 is engaged with the notch 28 of the engagement convex portion 27 , and the rotating body 6 is rotated from the ground through the height adjusting jig 70 . The height of the upper body 7 with respect to the ground surface is adjusted by being operated.

In this case, since the rotating body 6 and the upper body 7 are separate members, by rotating only the rotating body 6 without rotating the upper body 7, the iron lid 8 can be opened. The height of (upper body 7) can be adjusted. Therefore, even when the ground surface is paved with asphalt or the like, the height of the iron lid 8 can be adjusted without digging up the surroundings of the buried box 1. - 特許庁

In addition, since the rotating body 6 and the upper body 7 are connected so as to be relatively rotatable by the engaging projection 27 and the engaging recess 46 , the upper body follows the vertical movement of the rotating body 6 . 7 can be moved up and down. Therefore, every time the rotating body 6 is rotated and moved by a predetermined amount, there is no need to hit the upper body 7 from above with a hammer or the like to move it to the upper surface (flat support surface 26) of the rotating body 6. A simple operation can easily adjust the height of the upper main body 7 in a state of being buried in the ground.

At this time, the engaging convex portion 27 and the engaging concave portion 46 are shaped such that they can be engaged or disengaged only when the upper body 7 is tilted to one side with respect to the rotating body 6. In addition, the stoppers 13 and 14 provided on the outer body 5 prevent a portion of the upper body 7 including the connecting portion formed by the engagement protrusion 27 and the engagement recess 46 from tilting inside the outer body 5. Therefore, it is possible to accurately prevent the engagement concave portion 46 from separating from the engagement convex portion 27 after the embedded housing 1 is embedded.

Here, in the above-described embodiment, an example of a configuration in which the engaging protrusions 27 are provided on the inner periphery of the flat support surface 26 and the engaging recesses 46 are provided on the inner periphery of the sliding surface 45 has been described. For example, as shown in FIGS. 9 and 10, it is possible to provide an engaging concave portion 46 on the inner circumference of the flat support surface 26 and an engaging convex portion 27 on the inner circumference of the sliding surface 45 . In this case, the engagement concave portion 46 is formed by a tapered surface that expands in diameter from the upper end side to the lower end side, and the outer peripheral surface of the engagement convex portion 27 is inclined so as to be offset to one side from the upper end side to the lower end side.

The present invention is not limited to the embodiments described above, and various modifications and changes are possible, which are also within the technical scope of the present invention.

Reference Signs List 1 ... Buried housing 2 ... Attached pipe 2a ... Buried equipment 3 ... Base 5 ... External main body 6 ... Rotating main body 7 ... Upper main body 8 ... Iron lid 9 ... Packing 11 ... Female screw portion 12 ... Bolt insertion hole 13 ... Stopper 14 ... Stopper 15... Flange part 20... Externally threaded part 21... Pressing mechanism 22... Hollow through frame 23... Pressing member 23a... Inclined through hole 24... Actuating member 24a... Screw hole 25... Screw member 26... Flat support surface 27... Engagement protrusion 28... Notch 30... Locking mechanism 31... Ear 32... Bolt 33... Lock fitting 34... Nut 40... Iron lid receiving frame 41... Connecting part 42... Inward flange 43... Engagement groove 44... Projection 45... Sliding Surface 46 ... Engagement concave portion 50 ... Connecting member 51 ... Jig insertion port 52 ... Closing member 53 ... Return spring 55 ... Base part 56 ... Cover part 70 ... Adjustment jig 71 ... Shaft 72 ... Handle 73 ... Plate

Claims (4)

a cylindrical outer body having an internal thread on its inner periphery;
The upper end portion has an annular flat support surface, and the outer peripheral portion has a male thread portion that can be screw-engaged with the female thread portion of the outer body. a cylindrical rotating body capable of moving vertically inside the outer body by moving the body;
It has an iron lid receiving frame at the upper end and an annular sliding surface at the lower end, and the sliding surface is placed on the flat support surface so as to be rotatable relative to the rotating body. a tubular upper body;
The outer circumference is composed of an annular protrusion integrally formed on the rotating body so that the outer circumference on the lower end side coincides with the inner circumference of the flat support surface and protrudes vertically from the flat support surface. is inclined so as to be offset to one side in the horizontal direction from the lower end side to the upper end side, and a pair of notches provided at positions opposed to each other in the direction orthogonal to the one side;
A taper formed on the upper body, the inner circumference of the lower end of which coincides with the inner circumference of the sliding surface , and which expands a part of the inner circumference of the upper body from the lower end to the upper end. an engaging recess formed by the surface;
The rotating body and the upper body are relatively rotatable by the engagement of the engaging projection and the engaging recess , and are integrated with the rotating body without rotating the upper body. An embedded box, characterized in that it is connected so as to be movable in the vertical direction . a cylindrical outer body having an internal thread on its inner periphery;
The upper end portion has an annular flat support surface, and the outer peripheral portion has a male thread portion that can be screw-engaged with the female thread portion of the outer body. a cylindrical rotating body capable of moving vertically inside the outer body by moving the body;
It has an iron lid receiving frame at the upper end and an annular sliding surface at the lower end, and the sliding surface is placed on the flat support surface so as to be rotatable relative to the rotating body. a tubular upper body;
An inner peripheral circle formed on the rotating body coincides with an inner peripheral circle of the flat support surface , and a part of the inner peripheral surface of the rotating body is expanded from the upper end side to the lower end side. an engaging recess formed by a tapered surface;
The outer peripheral surface is composed of an annular protrusion integrally formed on the upper body so that the inner peripheral circle on the upper end side coincides with the inner peripheral circle of the sliding surface and protrudes vertically from the sliding surface. is inclined so as to be offset to one side in the horizontal direction from the upper end side to the lower end side, and a pair of notch portions are provided at positions opposed to each other in a direction orthogonal to the one side.
The rotating body and the upper body are relatively rotatable by the engagement of the engaging concave portion and the engaging convex portion , and are integrated with the rotating body without rotating the upper body. An embedded box, characterized in that it is connected so as to be movable in the vertical direction . The engagement protrusion and the engagement recess are shaped such that they can be engaged or disengaged only when the upper body is tilted to the one side with respect to the rotating body. 3. The embedded chassis according to claim 1 or claim 2. The outer body is arranged such that at least a portion of the upper body including the connecting portion between the engaging protrusion and the engaging recess is positioned inside the outer body in a non-tiltable state. 4. The embedded box according to any one of claims 1 to 3, further comprising a stopper for restricting movement of the vertical direction.

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