JPH09195498A - Foot rest for inspection and buried tank having the foot rest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute an inspection work or the like in a stable posture in the inside, and in the wide range of inspection positions. SOLUTION: Insert members 5 are previously inserted into the inner wall 1a of a buried tank 1, and foot rests 3 are fitted to the insert members 5 in the vicinity of an inspection position through fixtures 6. The foot rest 3 is constituted of a base 7 and an opening/closing sole step 8, and the sole step 8 is closed in no use so as to require no space. When inspection is executed, the sole step 8 is opened so as to ensure a fixed width space on which a foot is placed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried tank such as a manhole provided in a part of a sewer and, more particularly, to a buried tank having an inspection footrest for facilitating internal inspection.

[0002]

2. Description of the Related Art FIG. 14 is a schematic diagram showing a sewer.
The sewer has a configuration in which a plurality of manholes 50 are connected to each other via a pipe 51, and the sewer flows from the upstream to the downstream. A tank 52 is provided. The relay pump tank 52 pumps sewage (sewage) from the upstream by an internal pump, and pumps the sewage (sewage) in a high position downstream.

[0003] The relay pump tank 52 is designed so that a person can enter the relay pump tank 52 at the time of installation and repair, and inspection is particularly required for maintenance and replacement of the pump provided inside. FIG. 15 is a side sectional view of the relay pump tank 52. The relay pump tank 52 is of an assembling type, and a bottom plate 54 is provided horizontally on a foundation work section 53 at the bottom, on which a frame 55, a straight wall 56, a sloped wall 57, an adjustment ring 58, and a lid 59 are provided. It is superimposed sequentially.

[0004] A straight pipe 60 from the upstream is connected to the frame 55 of the relay pump tank 52, and sewage is pumped through a pumping pipe 62 by an electric pump 61 at a lower portion inside the pump, and is fed to a downstream straight pipe 63 side. Pump.

[0005]

The inspection of the inside of the relay pump tank 52 having the above-mentioned structure is carried out at steps 65 provided at predetermined intervals.
In particular, in order to inspect and replace the electric pump 61, the workability is poor only at the step 65. Therefore, as shown in the plan sectional view of FIG.

The scaffold plate 67 is a plate material longer than the inside diameter of the relay pump tank 52, and is used with one end placed on the step 65 and the other end in contact with the opposite surface inside the relay pump tank 52. The scaffolding plate 67 has a high inclination on the other end side, so that a tool or the like cannot be placed stably depending on the shape, and the lower part on the other end side is not supported, so that the safety is poor.

Further, since the scaffold plate 67 itself exists in the central portion inside the relay pump tank 52, the electric pump 61
At the time of replacement, etc., the scaffold plate 67 has to be taken out again, which complicates the operation. Further, the scaffold plate 67 is provided at an intermediate position in the length direction in which the scaffold plate 67 is installed.
If there is a structure (piping, motor, wiring, etc.) in 2, the installation cannot be performed, so the worker often puts a foot on the internal piping, etc., and there is a danger of slipping due to sewage, and also damages the structure. There is a fear.

When the electric pump 61 is taken out, the electric pump 61 is lifted by a chain.
At this time, the operator moves the electric pump 61
It is necessary to guide them with their hands so as to prevent the roll from rolling. At this time, the worker puts his foot on the step 65 and performs the work. In this state, the operator holds the step 65 several steps higher with one hand and guides the electric pump 61 with the other hand. It was dangerous.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an inspection footrest capable of performing an inspection work or the like in a stable posture inside a buried tank, and a foot capable of performing a wide range of inspection locations. It is an object of the present invention to provide a buried tank having a storage.

[0010]

In order to achieve the above object, an inspection footrest of the present invention is a footrest installed on a vertical wall surface (1a), and a joint surface portion along the vertical wall surface. A base (7) having (7a), a footrest plate (8) pivotally supported on the base and capable of opening and closing, and a footstand plate which is erected at right angles to the surface of the footrest plate. And an opening / closing operation piece (10) for holding the footrest plate in a horizontal state when the footrest plate is open and in a state where the footrest plate can be opened when the footrest plate is open. It is characterized by doing. The foot-holding base (7) may have a structure in which a gripping body (12) for grasping is detachable toward the lower part. Further, the opening / closing operation piece (10) is erected at an angle that exceeds a right angle with respect to the surface of the footrest plate (8), so that the footrest plate is opened when the footrest plate is open. The placing plate may be held in a state of being slightly inclined in the direction of the inner wall surface (1a). Further, a reflection material (8c) is provided on the surface of the footrest plate (8), and the position on which the foot is placed is visually recognized when the footrest plate is opened. It may be configured to be possible. Further, the footrest plate (8) may be provided with a slip preventing concavo-convex pattern (8bb) that is continuous in parallel along the end portion.

In addition, an embedding tank (1) having a predetermined diameter to be buried in the ground is provided with an insert member (5) for fixing on the inner wall surface (1a) in advance, and the footrest base (7). Has
A fixing hole (9a) corresponding to the insert member may be formed so that the footrest can be attached to or removed from the insert member via a fixing tool (6). Further, a plurality of the insert members (5) are provided at a predetermined height position of the embedding tank (1) at predetermined intervals in the horizontal direction, and the footrest is placed on the insert member at a desired angular position on a plane. The base (7) may be attached. Also, in the buried tank,
A plurality of footrests are provided in the horizontal direction at a predetermined distance (H) apart from each other in the height direction, and a gripping body (12) for gripping is provided under the base (7) of each footrest,
The footrest may be provided in the embedding tank so that the footrest can be moved laterally in the horizontal direction.

On the vertical inner wall surface 1a of the burying tank 1, a footrest for inspection is provided. The insert member 5 is previously inserted into the inner wall surface 1a, and the footrest base 7 is attached to the insert member 5 at a required position via the fixture 6, and can be easily removed. The footrest plate 8 is rotatable with respect to the base 7 and can be opened and closed only by the foot by operating the opening / closing operation piece 10, so that a large scaffold at the time of inspection can be secured in the open state, and inspection work can be performed. And the space inside the burying tank 1 can be widened in a closed state, and no space is required.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described. FIG. 1 is a side sectional view showing a relay pump tank used for sewerage as a buried tank. As described above, the relay pump tank 1 is provided with a structure such as a motor and a pipe therein, but this is omitted in the drawing.

Steps 2 are provided on the inner wall surface 1a of the relay pump tank 1 at predetermined intervals (for example, 30 cm) vertically. The step 2 is composed of a bar material having a substantially U shape, and both ends thereof are embedded in the relay pump tank 1. In addition, a resin material is provided at a position exposed inside the tank 1 to stabilize the grip and the footrest. The operator can go down the step 2 and inspect the internal structure.

An inspection footrest 3 is provided at a predetermined height on the inner wall surface 1a of the relay pump tank 1. The footrest 3 has an insert member 5 previously inserted into the inner wall surface 1a when the relay pump tank 1 is formed, and is fixed to a bolt mounting hole of the insert member 5 via a fixture 6 such as a bolt. You. The insert member 5
As shown in the plan view of FIG. 2, a pair is provided at a predetermined position of the relay pump tank 1 except for the vicinity of the step 2 in a plan view. In addition, each insert member 5 is connected to the relay pump tank 1 respectively.
It is provided toward the center direction. The surfaces of the insert member 5 and the fixture 6 are coated with ceramic or resin to have corrosion resistance.

FIG. 3 is a perspective view showing the inspection footrest 3, and FIG.
Is a view showing a state where the footrest 3 is closed, and FIG. 5 is a view showing a base 7 of the footrest 3. As shown in these,
The footrest 3 is composed of a base 7 and a footrest plate 8. The base 7 and the footrest plate 8 are each molded from a resin material, and are easy to manufacture and can be reduced in weight. is there.
The base 7 includes a joint surface 7a that curves in accordance with the curvature of the inner wall surface 1a, and a shaft holding portion 7b that stands upright from both sides of the joint surface 7a.

As shown in FIG. 5, two fixing holes 9a are formed at predetermined intervals in the joint surface 7a. The distance between the fixing holes 9a corresponds to the arrangement distance of the insert member 5. I have. The base 7 is fixedly joined to the two insert members along the inner wall surface 1a by using the fixture 6.

The shaft holding portion 7b has a circular bearing hole 7ba.
The upper part of the bearing hole 7ba provided in the one shaft holding part 7b is formed as a cutout part 7bc, and the notch part 7bc has a smaller width than the diameter of the bearing hole 7ba. The joint piece 7bd protrudes. Rotating shafts 8a at both ends of the footrest plate 8 are fitted into the bearing holes 7ba of the shaft holding portion 7b, and the footrest plate 8 is rotatable about the pivot shaft 8a.

To explain the assembling, a plane portion 8aa is formed on the rotating shaft 8a in parallel with the surface of the footrest plate 8, and the rotating shaft 8a in the direction in which the plane portion 8aa is provided is connected to the above-mentioned engaging shaft. The width is about 7 bd. Therefore,
The footrest plate 8 is attached to the base 7 in a state where one of the rotating shafts 8a is inserted into the bearing hole 7ba at the back in the drawing.
The other rotating shaft 8a is fitted in the direction of the bearing hole 7ba from the notch 7bc in the front. At this time, the footrest plate 8
When the rotating shaft 8a is pushed in the direction of the bearing hole 7ba in a state where it is set up, the flat portion 8aa can be attached by passing through the engagement piece 7bd. Conversely, the footrest plate 8 can be removed from the base 7 with the footrest plate 8 standing upright, and can be easily replaced when damaged or soiled.

The footrest plate 8 has a predetermined width and length,
Make sure there is at least enough space for one foot. As shown in the plan view of FIG. 6, an uneven pattern 8b for preventing slippage is formed on the surface of the footrest plate 8. Instead of the uneven pattern 8b, a plurality of holes penetrating the front and back of the footrest plate 8 may be formed. In particular, on the outer periphery in three directions of the footrest plate 8, uneven patterns 8 bb are formed in parallel and continuous for slip prevention to prevent the feet from slipping in the end direction. Reflectors 8c are provided at both ends of the free end of the footrest plate 8, and the reflector 8c indicates the position of the footrest plate 8 when the footrest plate 8 is opened. Even if the inside is dark at the time of inspection, the state where the footrest plate 8 is opened and the position where the foot is placed can be easily determined, and safety can be improved.

On the back surface of the footrest plate 8, a rotating shaft 8a
The opening / closing operation piece 10 is provided at a position near the center of the axis at right angles to the back surface. With the opening / closing operation piece 10, the locking surface 10 a is in contact with the inner surface of the joint surface 7 a with the footrest plate 8 opened. At this time, the surface of the footrest plate 8 is in a horizontal state as shown in FIG.

The footrest 3 for inspection includes an insert member 5
Is fixed by the fixing tool 6 at the place where is provided, for example, as shown in a plan sectional view of FIG. 7, by providing a plurality of insert members 5 at predetermined positions at equal angular intervals in advance, A footrest 3 can be provided at the two insert members 5 in the angular position. At this time, each of the insert members 5 is directed toward the center of the relay pump tank 1, and the footrest 3 can be provided between any two adjacent insert members 5.

As a result, the footrest 3 can be provided at a desired angular position in units of the interval between the insert members 5, and the footrest 3 can be provided in advance in the vicinity of the structure to be inspected at a later date. The inspection work can be easily performed at this inspection location. The unused insert member 5 where the footrest 3 is not provided is screwed and fixed with a resin bolt cap to prevent the exposed insert member 5 from being corroded. If two or more inspection footrests 3 are provided at the same height, such as opposed positions or orthogonal positions, both feet of the worker can be placed on the inspection footrests 3.

The inspection footrest 3 thus provided
Usually, as shown in FIG. 4, the footrest plate 8 is
Is closed at a predetermined angle in the direction of the inner wall surface 1a around the center. In this state, it is possible to prevent sewage and dirt from accumulating on the surface of the footrest plate 8, and dust from the upper portion does not adhere to the surface of the footrest plate 8. In this state, a predetermined gap 11 is left between the footrest plate 8 and the base 7,
The sewage can pass vertically through this gap 11, and the sewage can be prevented from accumulating at the inspection footrest 3 portion.

At the time of inspection, an inspector who has descended from step 2 from above can kick down the opening / closing operation piece 10 with his / her feet, thereby rotating the footrest plate 8 and opening it horizontally. Can be facilitated. The inspector can inspect structures such as pipes and motors with both feet placed on the footrest 3.

After the inspection, the closed state can be achieved only by kicking up the end of the footrest plate 8 with the foot, so that no manual operation is required for opening and closing these. In addition, even when large inspection equipment is carried in, the footrest 3 can be removed simply by removing the fixing device 6, and inspection and repair work using this inspection equipment can be easily performed.

Next, another embodiment of the present invention will be described. In a buried tank such as a relay pump tank 1 or a manhole, the footrest 3 may be provided in a plurality of stages in a height (buried height) direction as shown in a side sectional view of FIG. As shown in the perspective view of FIG. 9, the base 7 of the footrest 3 is provided with a gripping body 12 facing downward. The holding body 12 is made of a substantially U-shaped bar, and a flat fixing portion 12a is provided at each of the upper ends. Further, since the fixed portion 12a comes into contact with the inner wall surface 1a of the burying tank 1, the bent portion 12
b is provided, and the grip portion 12c is set at a position inwardly away from the inner wall surface 1a. The grip portion 12c is covered with a resin material, and is provided with a plurality of corrugated irregularities 12ca in a lateral direction so as to stabilize the grip as illustrated.

The fixing portion 12a of the holding body 12 is formed with a tapered surface 12aa having a wide upper portion, and the fixing portion 12a of the holding body 12 has a back surface in a fixing groove 7c formed on the joining surface portion 7a of the base 7. Positioning is inserted from. Fixing groove 7c
Is formed with a corresponding tapered surface 7ca to prevent the holding body 12 from dropping. FIG. 10 is a cross-sectional plan view of the base 7 of the footrest 3. Through holes 12 d and 7 d are formed in the fixing portion 12 a and the corresponding fixing groove 7 c, and the fixing member 6 is inserted into the insert member 5. Are simultaneously performed. The grip 12 can be attached to and detached from the lower part of the footrest 3 as necessary.

Since the footrest 3 provided with the gripping body 12 according to the above configuration constitutes a gripping portion at a location other than the step 2, the number of gripping locations of the inspector in the burying tank 1 can be increased,
Inspection work can be stabilized. In particular, as shown in FIG. 8, the footrest 3 has a predetermined height H in the height direction.
When provided at every (height of the inspector, for example, at 240 cm intervals), this worker holds the foot on the lower footrest 3 to hold the gripping body 12 provided on the upper footrest 3. The inspection work at this position can be stably performed, and the posture can be easily changed. As a result, the inspection work over a wider range can be easily and safely performed from the inspection of the limited range performed only in step 2.

FIG. 11 is a side sectional view showing still another embodiment of the present invention. As shown in the figure, in the buried tank 1 having a large inner diameter, it was difficult to move in the lateral direction inside the tank. However, the provision of the footrest 3 of the present invention makes it possible to move the buried tank 1 at an arbitrary height position. Movement in the direction can be facilitated. Specifically, a plurality of footrests 3 are provided at an arbitrary height position (a predetermined number of steps in step 2) at predetermined intervals in the horizontal direction. The gripping body 12 is provided on the footrest 3 above the predetermined height H. Thus, the inspector who has descended from step 2 can easily move in the lateral direction at this height position by opening the footrest plate 8 of the footrest 3 provided sideways. .

That is, the inspector should open the footrest plate 8 of the footrest 3 in the lateral direction in sequence while gripping the gripping body 12 of the footrest 3 on the upper side and move laterally along the inner wall surface 1a. Will be able to. In addition, even at a position on the way to move to the next footrest 3, inspection can be performed at the halfway position with the limbs placed on the front and rear footrests 3 and the gripper 12, respectively. Thereby, the state of the inner wall surface 1a of the buried tank 1 and the inspection of the internal structure can be inspected over the entire circumference at a predetermined height position.

The buried tank 1 is not limited to the above-mentioned annular pump having a generally used cross section such as a relay pump tank or a manhole, but may also have a flat rectangular shape such as a water storage tank as shown in FIG. Regardless of the shape, the joint surface portion 7a of the base 7 is shaped along the inner wall surface 1a, and the footrest 3 is provided to provide a lateral direction along the inner wall surface 1a inside the buried tank 1 having a wide inner diameter. Will be easier to move to.

In each of the above embodiments, the footrest plate 8 of the footrest 3 is set to be horizontal with the footrest plate 8 opened, but as shown in FIG. Alternatively, the footrest plate 8 may be opened and slightly inclined in the direction of the inner wall surface 1a. Specifically, the opening / closing operation piece 10 is slightly larger than a right angle with respect to the footrest plate 8 (for example, 92 °).
About 96 degrees). Thereby, even if the foot placed on the footrest plate 8 slips at the time of inspection, the foot remains on the inner wall surface 1.
Slipping can be stopped in contact with a, and at least the danger of stepping off the footrest plate 8 and falling can be prevented.

[0034]

According to the inspection footrest of the present invention, the footrest plate can be freely opened and closed with respect to the base. Can be opened to secure a footrest at the time of inspection, and in the opened state, the opening / closing operation piece can hold the footrest plate in a horizontal state to stabilize the state of the footrest. Then, the foot rest plate does not take up space in the closed state, so that the equipment can be easily carried in and out. In addition, this inspection footrest can be installed at a position different from the position of the step normally used when descending from the burial tank, and the inspection work can be performed closer to the inspection location. In addition, by providing a gripping body at the lower part of the footrest base, the gripper can be gripped at the time of checking the lower position of the footrest. Inspection work can be performed, and the safety of the inspection work can be improved. Further, the opening / closing operation piece is erected at an angle exceeding a right angle position with respect to the surface of the footrest plate, so that the footrest plate is buried with the footrest plate opened. Can be tilted toward the inner wall surface, so that even if the player slides on a foot, the foot moves to the inner wall surface to prevent falling and secure the safety of inspection work. Also, by providing a reflective material on the surface of the footrest plate, it is possible to easily confirm that the footrest plate is open and the position where the footrest is placed. become. In addition, by providing a non-slip uneven pattern parallel to the end of the footrest plate, the foot of the inspector does not slide toward the end, and safety can be improved.

The inspection footrest can be easily attached and detached by using a fixture by forming a fixing hole in the base of the inspection footrest and providing an insert member on the inner wall surface of the buried tank. Becomes By providing a plurality of insert members at predetermined intervals in the horizontal direction on the inner wall surface of the burying tank, a footrest can be attached to the insert member at a desired angular position. Also, a plurality of footrests can be provided on the same horizontal plane. In addition, a plurality of footrests are provided in the horizontal direction at a predetermined distance in the height direction of the embedding tank, and a gripping body is provided below the base of each footrest, so that the inside of the embedding tank is Then, the inspector can easily move laterally along the inner wall surface by simply opening the footrests in the horizontal direction in which the footrests are provided, and the inspection work range can be expanded. In particular, the ability to move laterally in a buried tank with a large inside diameter eliminates the need to change ladders and to go up and down many times each time, and to stabilize the ladders. At the same time, the inspection work at the predetermined height position can be facilitated and the work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a buried tank provided with an inspection footrest according to the present invention.

FIG. 2 is a plan sectional view of the buried tank.

FIG. 3 is a perspective view showing a footrest for inspection.

FIG. 4 is a perspective view showing a state where the footrest is opened.

FIG. 5 is a perspective view showing a base of the same footrest.

FIG. 6 is a plan view showing the surface of a foot rest plate.

FIG. 7 is a plan sectional view showing an arrangement state of an insert member.

FIG. 8 is a side sectional view showing a state where a plurality of footrests are provided in a height direction.

FIG. 9 is a perspective view showing a gripper.

FIG. 10 is a plan sectional view of a footrest base;

FIG. 11 is a side sectional view showing a state where a plurality of footrests are provided in a lateral direction of the burying tank.

FIG. 12 is a plan sectional view showing a buried tank of another shape.

FIG. 13 is a side sectional view showing an inclined footrest plate.

FIG. 14 is a schematic diagram showing a sewer.

FIG. 15 is a side sectional view of a relay pump tank.

FIG. 16 is a plan sectional view showing a conventional scaffold plate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Burial tank, 1a ... Inner wall surface, 2 ... Step, 3 ... Footrest for inspection, 5 ... Insert member, 6 ... Fixture, 7 ... Base,
7a: joining surface portion, 8: footrest plate, 10: opening / closing operation piece,
12 ... A gripping body.

Claims (8)

[Claims] 1. A footrest installed on a vertical wall surface (1a), the base (7) having a joint surface portion (7a) along the vertical wall surface, and pivotally supported on the base. , Openable foot plate (8)
And standing upright at a right angle to the surface of the footrest plate, when the footrest plate is in a closed state, the footrest plate is in a protruding state so that an opening operation can be performed, and the footrest plate is in an open state. An inspection footrest, comprising: an opening / closing operation piece (10) for holding the placing board in a horizontal state. 2. The inspection footrest according to claim 1, wherein the foothold (7) is configured such that a gripping body (12) for grasping is detachable toward the lower side. 3. A state in which the opening / closing operation piece (10) is erected at an angle exceeding a right angle with respect to the surface of the footrest plate (8) to open the footrest plate. The inspection footrest according to claim 1, wherein the footrest plate is held in a state of being slightly inclined toward the inner wall surface (1a). 4. A reflector (8c) is provided on the surface of the footrest plate (8), and the foot is placed on the footrest plate with the footrest plate open. The inspection footrest according to claim 1, wherein the footrest for inspection is configured to be visible. 5. The footrest plate (8) has a concavo-convex pattern (8b) for slip prevention which is continuous in parallel along the edge.
The inspection footrest according to claim 1, wherein b) is formed. 6. An embedding tank (1) having a predetermined diameter, which is buried in the ground.
An insert member (5) for fixing is previously provided on the inner wall surface (1a) of the footrest, and a fixing hole (9a) corresponding to the insert member is formed in the footrest base (7). The foot rest is a fixture (6) for the insert member.
The buried tank having the inspection footrest according to claim 1, which is configured to be attached or detached via the. 7. The insert member (5) is provided in plural at a predetermined height position of the embedding tank (1) at predetermined intervals in the horizontal direction with respect to the insert member at a desired angular position on a plane. 7. The buried tank having an inspection footrest according to claim 6, wherein the footrest base (7) is attached. 8. The buried tank is provided with a plurality of footrests horizontally separated from each other by a predetermined distance (H) in the height direction, and each footrest has a foothold (7) for gripping. The buried tank with a footrest for inspection according to claim 7, wherein the holding body (12) is provided so that the footrest is provided in the buried tank so that the footrest is horizontally movable.