JP3661968B2 - Cover for underground structure for installing communication equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid for an underground structure for mounting a communication device, which uses multimedia to transmit information such as the amount of water used for flushing toilets in buildings.
[0002]
[Prior art]
Conventionally, the amount of water used for each household and building of waterworks and the amount of water used for each building of waterworks used as flushing water for flush toilets is a water meter built into these water supply and water supply supply systems. The meter reader circulated and confirmed by reading the meter, and specified based on the result of the meter reading.
[0003]
Checking the amount of water used by meter reading is a task that the meter reader periodically circulates in each region, which increases the time required for meter reading and patrol and also increases the burden on the meter reader. The problem has been pointed out.
[0004]
On the other hand, with recent rapid spread in each field of multimedia, it is already in the development stage for practical use to perform meter reading of water meter in city by remote meter reading method. This is the development of a communication network in which an optical fiber cable (hereinafter simply referred to as “cable”) is connected to the output end of the detection system of each consumer's water meter from the management facility such as the water station in each region. By collecting information from each water meter and inputting it to the management facility, remote meter reading can be automated without requiring patrol work by a meter reader.
[0005]
In particular, in recent years, the existing sewer pipes have been used in place of such cable burials, and the communication device is housed in a housing attached to the back surface of the manhole cover body raised from the sewer pipes. By connecting a cable laid in the sewer pipe to this communication device and receiving a communication signal from the water meter, the amount of water used for the water supply and the sewer from each consumer is received from the management facility. It is managed by remote meter reading.
[0006]
[Problems to be solved by the invention]
Thus, attaching the communication device to the back surface of the lid body of the manhole itself has no problem because the lid body has sufficient strength. On the other hand, although various things can be applied to the structure for connecting the cable to the communication device, the lid body is structured to open and close, so the connection structure should be designed with attention paid to the opening and closing operation of this lid body. Necessary.
[0007]
For example, the simplest connection structure is that the cable is connected to the lower surface of the communication device with an adapter and hung in a straight line. However, the weight of the cable is also increased because the converging body of many optical fibers is further coated with metal. Since it is large, the cable may come off unless the strength of the adapter and the connection strength with the cable are sufficient.
[0008]
Also, when opening and closing the lid body, the cable must be connected so as not to obstruct the movement of the lid body. For example, the cable at the connection portion with the lid body can swing freely. preferable. However, if the cable moves freely in this way, the cable is easily sandwiched between the receiving frame when the lid body is opened and closed, and the cable surface is damaged or broken.
[0009]
Resolve all come challenges in the present invention is to make it so that no connection of cable damage to the cable even when the opening and closing of the well is maintained and the lid body to the communication device.
[0012]
[Means for Solving the Problems]
To solve the previous SL challenges, the present invention is, on the rear surface of the lid body which is openably mounted against receiving frame of the lid for underground structures, it is attached a housing for accommodating the communication device, and the communication device An adapter for connecting a cable laid inside the underground structure is provided, and a holding mechanism for restraining the cable connected to the adapter is provided on the outer surface of the housing.
[0013]
With such a configuration, since the cable is once held by the holding mechanism, it is possible to prevent the cable from being pulled out as compared with the case where the cable is directly connected to the adapter and hung linearly.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the holding mechanism is a pair of holding ribs that are formed in a direction around the outer peripheral surface of the housing and are spaced apart from each other in the vertical direction, and the cable can be restrained and held between these holding ribs. Can be configured.
[0017]
With such a configuration, since the cable is held from above and below, the cable does not interfere with the receiving frame when the lid body is opened and closed, and damage to the cable and disconnection can be prevented.
[0018]
In addition, the holding mechanism is capable of restraining and holding the cable on the outer surface of the hinge-side housing that is connected to the receiving frame so that the lid body can be opened and closed, so that the cable is less likely to contact the inner peripheral surface of the receiving frame when the lid body is opened and closed. can do.
[0020]
In addition, since the adapter is provided in the lid body so as not to interfere with the housing, only the housing can be removed while the cable is connected to the communication device, so that the maintenance and inspection of the communication device can be easily performed. it can.
[0021]
【Example】
FIG. 1 is a perspective view showing an embodiment of a lid for an underground structure for mounting a communication device according to the present invention, and shows a state in which the lid body is opened, and FIG. 2 is a longitudinal sectional view of a main part when the lid body is closed. FIG. 3 is a schematic view showing cable wiring in the underground structure.
[0022]
In the figure, receiving frame 1 at the upper end of the manhole 51 as underground construction formed by raised from sewage vascular path 52 is installed, capable of opening and closing the lid body 2 to be fitted to the tapered fitting surface 1a of the receiving frame 1 It is attached to. On the rear surface of the peripheral edge of the lid body 2, a hinge fitting 2a that is dropped into a hinge seat 1b formed on the inner circumference of the receiving frame 1 is provided so as to be swingable. The cage 2b is provided so as to be rotatable. Then, as shown in FIG. 2, the lid main body 2 is fitted to the receiving frame 1 and the locking rod 2b sinks under the lock seat 1c of the receiving frame 1 so that the manhole 51 is closed or locked. After the hook 2b is rotated and unlocked, the lid body 2 can be opened vertically as shown in FIG. 1 with the connecting point between the hinge fitting 2a and the hinge seat 1b as a fulcrum.
[0023]
On the back surface of the lid body 2, a communication device 10 including a wireless unit 10a for receiving and transmitting communication signals, a power source 10b, a communication device body 10c, a control unit 10d and the like is integrally fixed with bolts (not shown). In addition, a metal housing 3 that covers the entire communication device 10 is provided. The housing 3 has a substantially rectangular shape in plan view and a concave cross section having an appropriate thickness. By screwing a nut 2d through a bolt 2c planted in the lid body 2 to a flange 3a formed on the entire periphery of the upper end. The lid body 2 is detachably connected.
[0024]
The communication device 10 fixed to the back surface of the lid main body 2 is an end device of a communication transmission system using an optical fiber as a medium constituting a system for receiving a communication signal from an output end of a water meter of each consumer by remote operation. It will be. That is, a water meter for each consumer is provided with a detection device that detects and calculates the amount of water used, and this detection device is remotely operated using a cable 53 laid in the sewer pipe 52. A signal for transmitting information related to the amount of water used is transmitted from the communication device 10 and a signal related to the amount of water used output from the detection device is received. For such signal transmission, a cable 53 whose base end is connected to the management facility is laid in the sewer pipe 52 as shown in FIG. 3, and the other end of the cable 53 is placed in the manhole 51. A branch box 54 for connecting is placed. A branch cable 55 that is branched from the branch box 54 and connected to the communication device 10 is wired in a loop in the manhole 51 as an extra length when the cover is opened.
[0025]
In addition, the communication device 10 in the housing 3 transmits and receives signals to and from the detecting device of the water meter of each consumer by the wireless unit 10a that is incorporated so as to face the upper surface of the lid body 2. . And the adapter 4 for connecting the communication apparatus 10 and the branch cable 55 is provided in the back surface of the cover main body 2 in the vicinity of the outer peripheral surface of the housing 3 as shown in FIG.
[0026]
As shown in FIG. 4 (b), the adapter 4 is formed on the back surface of the lid body 2 and communicates with a conduction path 2e for passing wiring from the communication device 10 inside when the housing 3 is connected. It is attached to do. Then, the branch cable 55 and the communication device 10 are brought into conduction by connecting the coupler 55a connected to the tip of the branch cable 55 to the adapter 4 wired to the connection portion. Further, as shown in FIG. 2, the adapter 4 has a posture in which the connecting end with the coupler 55a is not directly below, but in the direction of the locking rod 2b and obliquely downward toward the holding ribs 3b and 3c described later. The made coupler 55a is also coupled to the connecting end of the adapter 4 in an oblique posture coaxial.
[0027]
To avoid interference between the receiving frame 1 with the outer periphery of the housing 3 to stably hold the branch cable 55, a pair of holding ribs 3b spaced vertically as shown in FIG. 5, and 3c as a holding mechanism Provide. Holding rib 3b of the lower arrangement is as shown in FIG. 6, formed on the outer periphery of the housing 3 with the exception of a part of the portion facing to the adapter 4 side, straight portion also serves as a grip portion when removing the housing 3 . Further, the holding ribs 3c arranged on the upper side are partly formed only at the corners of the housing 3, and the holding ribs 3b at the part where the branch cable 55 is released downward as shown in FIG. The end of is slope 3b-1 that is inclined obliquely downward to prevent the branch cable 55 from being damaged. Further, holes 3d are formed in the holding ribs 3b and 3c at positions where they are aligned with each other, and a tie band 5 for restraining the branch cable 55 through the holes 3d is provided. The binding band 5 is a flexible string made of synthetic resin, and can be deformed so as to draw an annular shape by passing it through a binding ring 5a provided at one end.
[0028]
In the above configuration, the branch cable 55 from the branch box 54 is sandwiched between the holding ribs 3b and 3c as shown in FIGS. 1 and 6, and circulates the outer periphery of the housing 3 almost one round, and the coupler 55a at the tip thereof. Are connected to the adapter 4 to be electrically connected to the communication device 10 in the housing 3. The branch cable 55 sandwiched between the holding ribs 3b and 3c is constrained by the binding band 5 so as not to come out of the holding ribs 3b and 3c.
[0029]
As described above, the branch cable 55 is held around the outer periphery of the housing 3 so as not to come off from the holding ribs 3b and 3c. Therefore, the weight of the branch cable 55 is received by a large receiving area on the upper surface of the holding rib 3b. be able to. For this reason, even if the branch cable 55 is heavy, an excessive load is not applied to the connection portion between the coupler 55 a and the adapter 4, and the branch cable 55 is prevented from being detached from the adapter 4. Accordingly, even when the vehicle frequently passes through the upper surface of the lid body 2 and vibration is applied, the branch cable 55 is reliably prevented from being pulled out, and the signals from the water meter of each consumer are always received well. And can be sent to the management facility.
[0030]
When the lid body 2 is opened, the corner portion of the housing 3 having a substantially rectangular shape in plan view is most likely to hit the inner peripheral surface of the receiving frame 1. On the other hand, the branching cable 55 is configured such that the holding ribs 3b and 3c are vertically covered at the corner portion of the housing 3, and the outer peripheral surface of the housing 3 with respect to the inner periphery of the receiving frame 1 when the lid body 2 is opened. Therefore, even if the corner portion of the housing 3 interferes with the inner peripheral surface of the receiving frame 1, the branch cable 55 itself sandwiched between the holding ribs 3 b and 3 c directly contacts the receiving frame 1. There is no. Therefore, an accident that damages or breaks the surface of the branch cable 55 is not caused.
[0031]
Furthermore, when the lid body 2 is vertically inverted and opened to the ground side for maintenance and inspection of the communication device 10, the work can be performed by simply removing the housing 3 from the lid body 2 while the branch cable 55 remains connected to the communication device 10. That is, since the adapter 4 for connecting the branch cable 55 to the communication device 10 is provided on the back side of the lid body 2 and does not interfere with the housing 3, the binding band 5 shown in FIG. If the branch cable 55 is removed from the holding ribs 3 b and 3 c, only the housing 3 can be removed from the lid body 2. Therefore, maintenance and inspection can be performed while the branch cable 55 is connected to the communication device 10, and input / output of signals at the time of inspection can be easily performed.
[0032]
FIG. 7 shows another embodiment. In this embodiment, the holding rib 3b for holding the branch cable 55 from above and below on the outer periphery of the housing 3 on the hinge fitting 2a side with the housing 3 mounted on the lid body 2. , 3c.
[0033]
Further, the adapter 4 has a connection end to the coupler 55a not directly below, but is inclined obliquely downward toward the holding ribs 3b and 3c formed only on the hinge fitting 2a side of the outer periphery of the housing 3, so that the metal coupler 55a is also coupled to the connection end of the adapter 4 in an oblique posture coaxial. In this embodiment, the branch cable 55 does not circulate around the outer periphery of the housing 3 and is held by the holding ribs 3b, 3c on the hinge fitting 2a side. This is because the outer periphery of the housing 3 on the side does not easily come into contact with the inner peripheral surface of the receiving frame 1 when the lid body 2 is opened and closed, and it is sufficient to hold the branch cable 55 in one place. Further, since the branch cable 55 is held in one place, the branch cable 55 can be easily removed at the time of inspection, and maintenance and inspection of the communication device 10 can be easily performed.
[0034]
FIG. 8 shows still another embodiment. In this embodiment, the inside of the housing 3 becomes hot due to solar heat and heat generated from the communication device 10 on the outer periphery of the housing 3, and the communication device 10 malfunctions. Many fins 6 for heat dissipation are formed so as not to exist.
[0035]
In the closed state, the fin 6 is parallel to the axial direction of the vertical hole of the manhole 51 in order to efficiently contact and radiate heat naturally convection in the axial direction of the vertical hole of the manhole 51. Is formed. In FIG. 8, the configuration other than the formation of a large number of fins 6 on the outer periphery of the housing 3 is the same as that of the embodiment shown in FIG.
[0036]
As mentioned above, although this invention was demonstrated based on the Example, this invention is not limited to the Example mentioned above, The power supply as a communication apparatus can use a battery or a solar cell, and a radio | wireless part is Even if it does not face the upper surface of the lid body, it may be on the back surface of the lid body. In addition, the housing may be circular instead of a substantially square shape in plan view. In this case, it is preferable to provide a holding mechanism such as a holding rib on the entire circumference.
[0037]
In addition, when the holding mechanism is formed so as to go around the outer periphery of the housing, the holding rib is formed on almost the entire circumference, but it may be scattered in several places.
[0038]
In the embodiment, a large number of fins are formed on the outer periphery of the housing. However, the fins may be formed on the bottom surface of the housing or may be orthogonal to the axial direction of the manhole vertical hole in the closed state. Specifically, it is preferable that the fin be parallel to the axial direction of the manhole.
[0039]
【The invention's effect】
In the present invention, the cable connected to the communication device is supported by the holding mechanism formed on the outer surface of the housing, so that the cable can be reliably prevented from coming out as compared with the case where the cable is directly connected to the lower surface of the communication device. In addition, if the holding rib is formed in the direction that goes around the outer peripheral surface of the housing as the holding mechanism and covers the top and bottom of the cable, the cable can be prevented from interfering with the receiving frame when the lid body is opened and closed, and the cable is damaged. There is no risk of breakage.
[0040]
In addition, the holding mechanism is capable of restraining and holding the cable on the outer surface of the hinge-side housing that is connected to the receiving frame so that the lid body can be opened and closed, so that the cable is less likely to contact the inner peripheral surface of the receiving frame when the lid body is opened and closed. In addition, the cable can be easily removed at the time of inspection, and the maintenance and inspection of the communication device can be easily performed.
[0043]
Since the adapter is provided on the lid body so as not to interfere with the housing, only the housing can be removed while the cable is connected to the communication device, so that the maintenance and inspection of the communication device can be easily performed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a lid for an underground structure for mounting a communication apparatus according to the present invention, in a state where a lid body is opened and raised.
FIG. 2 is a longitudinal sectional view of a main part when a lid body is closed.
Figure 3 is a schematic diagram showing a wiring of the cable to the lid body from the sewage vascular path.
4A and 4B show details of the adapter provided on the lid body, wherein FIG. 4A is a bottom view showing the main part of the lid body, and FIG. 4B is a longitudinal sectional view of the main part.
5A and 5B are external views of the housing, wherein FIG. 5A is a view seen from a surface corresponding to the adapter of the lid body, and FIG. 5B is a right side view of FIG. .
FIG. 6 is a perspective view showing a state where the lid body is vertically inverted.
FIG. 7 is a perspective view showing a state in which a lid body provided with a cable holding mechanism is vertically inverted according to another embodiment of the present invention.
FIG. 8 shows still another embodiment of the present invention, and is a perspective view showing a state in which a lid body having fins on the outer periphery of a housing is vertically inverted.
[Explanation of symbols]
1: receiving frame 2: lid body 2a: hinge metal fitting 3: housing 3a: flanges 3b and 3c: holding rib (holding mechanism)
3d: Hole 4: Adapter 5: Cable tie 5a: Cable tie 6: Fin 10: Communication device 10a: Radio unit 51: Manhole (underground structure)
52: Sewer pipe line 53: Cable 54: Branch box 55: Branch cable (cable)
55a: Coupler

Claims (5)

  Attach the housing that houses the communication device to the back of the lid body that can be opened and closed with respect to the receiving frame of the lid for the underground structure, and connect this communication device to the cable laid inside the underground structure And a holding mechanism for restraining a cable connected to the adapter is provided on the outer surface of the housing.   The lid for an underground structure for mounting a communication device according to claim 1, wherein the holding mechanism is configured to circulate and restrain a cable connected to the adapter.   The holding mechanism is a pair of holding ribs formed in a direction around the outer peripheral surface of the housing and spaced apart from each other in the vertical direction, and the cable can be restrained and held between the holding ribs. A cover for underground structures for mounting communication devices.   2. The lid for an underground structure for mounting a communication device according to claim 1, wherein the holding mechanism is capable of restraining and holding the cable on the outer surface of the hinge-side housing in which the lid body is connected to the receiving frame so as to be opened and closed. The lid for an underground structure for mounting a communication device according to any one of claims 1 to 4 , wherein the adapter is provided on the lid body so as not to interfere with the housing .

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