JP2902522B2 - Housing for underground structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for an underground structure such as a gate valve housing disposed above a gate valve chamber.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing for an underground structure in which a height can be adjusted by screwing an inner cylinder into an outer cylinder and rotating the inner cylinder.

[0002]

2. Description of the Related Art Conventionally, as such a gate valve housing, for example,
For example , one disclosed in Japanese Utility Model Publication No. 63-9655 is known.

[0003] The gate valve housing is a gate valve buried underground.
When it is installed in the upper part of the room , the height is once roughly adjusted to the height, and then the inner cylinder is rotated so that the upper surface of the inner cylinder can be accurately aligned with the pavement surface.
Also, even when the height of the pavement surface changes due to pavement work, it is possible to cope with raising or lowering the height just by rotating the inner cylinder, and the circumference at the time of adjusting the bulk as in the past <br / > Excavation of the surrounding pavement is not required.

[0004] This gate valve housing has a fixing device provided with a bolt that penetrates the inner cylinder and whose tip abuts on the inner peripheral surface of the outer cylinder. , To prevent rotation of the inner cylinder and to prevent loosening and vertical movement of the inner cylinder due to vibration when passing through the vehicle.

[0005]

However, in this structure, the rotation of the inner cylinder is prevented only by the frictional force of the contact surface between the tip of the bolt and the inner peripheral surface of the outer cylinder. When vibration is applied over a period, the bolt is loosened, and a gap is generated between the tip of the bolt and the inner peripheral surface of the outer cylinder. As a result, the frictional force between the tip of the bolt and the inner peripheral surface of the outer cylinder is reduced, and the inner cylinder itself rotates, causing loosening, rattling or swinging.

Accordingly, an object of the present invention is to provide an underground structure in which an inner cylinder is screwed into an outer cylinder so that the height can be adjusted.
It is an object of the present invention to obtain a means for effectively preventing the occurrence of loosening, rattling, rotation and swing for a long time in an object housing .

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an outer cylinder having an internal thread formed on an inner peripheral surface thereof, and an external cylinder mounted on the outer cylinder and threadedly engaged with the female thread on an outer peripheral surface. An inner cylindrical body having a possible external thread portion, and the inner cylindrical body further includes a detachable anchor member protruding outward at a position protruding above the outer cylindrical body. .

[0008]

In the case of the underground structure casing of the present invention, by providing an anchor member projecting outward on the inner cylinder,
At the time of installation, this anchor member is located in pavement such as asphalt or in the ground, thereby preventing rotation and swinging of the inner cylinder. Also, since this anchor member is detachable, when the height is adjusted again, once the anchor member is removed, the inner cylinder is rotated as in the case of the conventional gate valve housing, and the height is adjusted. Can be performed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments shown in the drawings.

[0010] Figure 1 is a plan view showing by omitting the lid body a gate valve housing according to an embodiment of the present invention, FIG 2 shows a state of mounting the closure body to the A-A line sectional view of FIG. 1 is there.

Reference numeral 1 denotes an outer cylindrical body having a circular horizontal cross-section with open upper and lower ends. A female screw portion 2 is formed on substantially the entire inner peripheral surface, and a flange 3 is formed on the outer peripheral surface of the base portion. I have. Inside the outer cylindrical body 1, an inner cylindrical body 4 having a male screw portion 5 which can be screwed to the female screw portion 2 formed at a lower portion of the outer peripheral surface is screwed. A receiving portion 6 having a tapered surface is formed at the upper end on the inner peripheral side of the inner cylindrical body 4, and a lid body 7 is attached to the receiving portion 6 so as to be openable and closable.

As shown in the plan view of FIG. 3 and the vertical cross-sectional view of FIG. 4, the inner peripheral surface of the outer cylinder 1 has a female screw portion 2 of equal width extending from the upper end to the lower end, which is notched vertically. Part 8 to 60
Six positions are provided at an interval of °. The number of the cutouts 8 is not limited to six, but as the number of the cutouts 8 increases, the inner cylinder 4 can be fixed at a smaller rotation angle as described later. .

Returning to FIGS. 1 and 2, reference numeral 9 denotes a fixing device provided at the lower portion of the inner cylinder 4, and as shown in the longitudinal sectional views of FIGS. A protruding box-shaped frame portion 10 is formed, and a through hole 10 a and a nut 12 held by a retaining plate 11 outside the through hole 10 a are arranged in the frame portion 10. The upper and lower frame portion 10, to form a their respective notch on 13 and 14. Reference numeral 15 denotes a pressing member having a U-shaped cross section provided with first and second contact portions 15a and 15b inserted into the upper and lower cutouts 13 and 14, and a bolt hole 15c . , The second contact portion
15a and 15b are fitted into notches 13 and 14, respectively, and fixing bolts 16 are inserted into bolt holes 15c and through holes 10a.
And screwed into the nut 12 on the outer surface side. Therefore, by tightening the fixing bolt 16, the tips of the first and second contact portions 15a and 15b of the pressing tool 15 are
By projecting from the notches 13 and 14 and abutting on the bottom surface 8a of the cutout 8 of the outer cylinder 1, rotation of the inner cylinder 4 is prevented.

On the upper part of the inner cylinder 4, as shown in FIG.
Bolts 17 as anchor members are attached to three places. Each bolt 17 has a threaded portion at its base end for screwing the inner cylinder 4 shown in FIG. 7 to a nut 19 provided on an upper mounting portion 18, and has a tapered pin shape whose diameter decreases toward the tip. ing.

Numeral 21 denotes a stopper for preventing the inner cylinder 4 from coming off due to excessive lifting, as shown in the sectional view of FIG.
A bolt 24 is screwed inwardly to a nut 23 of a mounting portion 22 provided at the upper end of the bracket. Therefore, when the inner cylinder 4 is raised to the upper limit, the distal end of the bolt 24 is hooked on the male screw portion 5 of the inner cylinder 4 as shown in the vertical sectional view of FIG.

As shown in the bottom view of FIG. 9, the male screw portion 5 of the inner cylinder 4 has two protrusions 5 at the upper and lower ends on the circumference.
a. This projection 5a is the inner peripheral surface of the outer cylinder 1
The center position of the inner cylinder 4 at the time of rotation coincides with the center position of the outer cylinder 1 without increasing the frictional force of rotation at the time of height adjustment by point contact with the inner cylinder 4. Rattling and rocking can be prevented. Further, after the installation, the swing can be prevented by the synergistic effect with the pressing tool 15.

In the above configuration, the installation of the gate valve housing is performed by first setting the mounting portion 18 of the inner cylinder 4 above the outer cylinder 1.
State in which the inner cylinder 4 is screwed to the outer cylinder 1 so as to be located at
In the <br/> threaded portion formed from the inside of the inner cylinder 4 to the base end portion of the bolt 17 is screwed into the nut 19, projecting its tip outward
Let it be .

Next, similarly to the conventional gate valve housing, the inner cylinder 4 is rotated up or down to adjust the height to the same level as the surrounding ground surface. When this adjustment is completed, the inner cylinder 4 is rotated so that the frame 10 is aligned with the cut 8 closest to the frame 10 of the inner cylinder 4 among the six cuts 8. Next, the fixing bolt 16 is tightened to bring the tips of the first and second contact portions 15a and 15b of the pressing tool 15 into contact with the bottom surface 8a of the cutout portion 8 of the outer cylinder 1.

When the gate valve housing of this embodiment is installed and buried,
Since the bolts 17 as the anchor members are located in the pavement such as asphalt or in the ground, the rotation and swinging of the inner cylinder can be reliably prevented.

Next, if it is necessary to change the height of the inner cylinder 4 after embedding, the bolt 17 can be pulled into the inner cylinder 14 by unscrewing the bolt 17 and the nut 19. The fixing bolt 1 of the fixing device 9 below the inner cylinder 4
The Rukoto retract the pusher 15 by loosening the 6 to rotate the inner cylindrical member 4 similarly to the conventional gate valve housing can be changed in height.

Bolt 1 as an anchor member of the present embodiment
7 has a tapered pin shape, so that it can be easily pulled out from the ground, and the bolt 1 can be inserted into the ground again.
First, hit and strike the head 20 of the
It is possible to screw and attach it. After burying Therefore, even when it becomes necessary to change the height of the inner cylindrical member 4, Bol without removing all the soil outside the inner cylinder 4
Attachment and detachment of the door 17 is possible.

In the present embodiment , the bolts 17 as the anchor members are attached to the three places on the upper part of the inner cylinder 4, but the number is not limited to this number and can be increased or decreased according to the conditions. Moreover, even with the anchoring member is not limited to the tapered pin-shaped bolt 17 having a threaded portion at the proximal end portion. For example, threaded parts are provided not only on the base end but also on the whole
Bolts can also be used as anchor members. Even in this case, it is possible to remove the anchor member from the ground and reinsert the anchor member into the ground by rotating the anchor member. Therefore, it is not necessary to remove all the earth and sand outside the inner cylinder 4. Absent.

[0023]

As described above, the underground structure of the present invention
In the case for a structure , the inner cylinder protrudes above the outer cylinder.
A detachable anchor member protruding outward is provided at the extended position . Therefore, when the anchor member is buried, the anchor member is located in the pavement such as asphalt or in the ground, so that the rotation and swinging of the inner cylinder can be effectively prevented for a long period of time.

Further, since the anchor member is detachable, when the height is adjusted again, the conventional partition can be removed by removing the anchor member once without removing all the earth and sand outside the inner cylinder. The height adjustment can be performed by rotating the inner cylindrical body in the same manner as the valve housing.

[Brief description of the drawings]

FIG. 1 is a plan view showing a gate valve housing according to an embodiment of the present invention with a lid omitted.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view of only the outer cylinder.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a longitudinal sectional view of the inner cylinder.

FIG. 6 is a sectional view taken along line BB of FIG. 1;

FIG. 7 is a sectional view taken along line CC of FIG. 1;

FIG. 8 is a sectional view taken along line DD of FIG. 1;

FIG. 9 is a bottom view of the inner cylinder.

[Explanation of symbols]

Reference Signs List 1 outer cylinder, 2 female thread, 3 flange, 4 inner cylinder, 5 male thread, 6 receiving part, 7 lid body, 8 cutout, 8a bottom, 9 fixing device, 10 frame, 10a
Through hole, 11 retaining plate, 12 nut, 1
3, 14 notch, 15 pressing tool, 15a first contact portion
, 15b second contact portion, 15c bolt hole, 16
Fixing bolt, 17 bolt ( anchor member ) , 18 mounting part, 19 nut, 20 head, 21 stopper, 22 mounting part, 23 nut, 24 bolt

Claims (1)

(57) [Claims] An outer cylindrical body having an internal thread formed on an inner peripheral surface thereof;
An inner cylindrical body mounted on the outer cylindrical body and having an external thread formed on an outer peripheral surface thereof and capable of being screwed to the female screw section, wherein the inner cylindrical body is outwardly positioned at a position protruding above the outer cylindrical body. Underground structure provided with a detachable anchor member protruding
Housing for goods.