JPH0730824Y2 - Temporary scaffolding structure in manhole - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a temporary scaffolding structure in a manhole provided with a waste bag.

[Prior Art] The manhole cover and the upper end of the cover ring that constitutes the neck of the manhole must be flush with the road surface so as not to obstruct the passage of pedestrians and vehicles.

Therefore, the lid ring receiver must be moved up and down every time the road surface is raised or lowered.

In that case, it is necessary for a worker to enter the vertical hole of the manhole to perform the work.

Therefore, conventionally, a stick, a ladder, or the like is erected above the bottom of the vertical hole of the manhole, that is, the bottom of the horizontal hole orthogonal to the vertical hole to secure a footing for workers.

Although there is a step in the manhole, this step is for ascending and descending the worker, and when a foot is put on this step, the worker's hands cannot be freely held and it is not suitable for work.

[Problems to be solved by the invention] However, as described above, a long rod or ladder is required to erect the rod or ladder from the bottom of the manhole to the top, which is troublesome to carry and install. There was a point.

In addition to this, concrete pieces and debris fall into the manhole mine during work, so not only is it time-consuming to clean them, but the dropped concrete pieces may damage the cables wired in the manhole mine. There was a problem that there was.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to easily carry and temporarily install / remove, and moreover, concrete pieces, scraps, and the like during work. It is intended to provide a scaffolding structure for temporary construction in a manhole that can prevent the falling of the inside of the mine.

[Means for Solving the Problems] Therefore, the present invention is to achieve the above object, and the contents thereof will be described below with reference to the embodiments shown in the drawings.

The temporary scaffolding structure for a manhole according to claim 1, wherein the scaffolding device is detachable and fixed in the middle of the height of the vertical hole forming the manhole by frictional resistance with the circular inner peripheral surface thereof.
It is characterized in that it is provided with a placing plate, and a waste bag whose bottom is placed on the upper surface of the placing plate and whose upper surface is circularly opened along the circular inner peripheral surface of the vertical hole.

The scaffolding structure according to claim 2 is, in addition to the scaffolding device according to claim 1 and the waste bag, between the upper surface of the mounting plate and the bottom of the waste bag.
A circular mounting plate adapted to the circular inner peripheral surface of the vertical hole of the manhole is arranged.

The scaffolding structure according to claim 3 is characterized by the structure of the scaffolding device according to claim 1, wherein the scaffolding device comprises a pair of left and right support legs facing each other in a V shape, and both support legs. A connecting member that is located between the one ends that approach each other and that adjusts the opening degree of the other ends of the other ends of both support legs that are separated from each other, and that is located between the other ends of both support legs. It is characterized in that it comprises an adjusting member for adjusting the opening degree, which adjustably connects the facing interval of the supporting legs.

The scaffolding structure according to claim 4 is also characterized by the scaffolding device, and the lower surfaces of the one ends of both supporting legs of the scaffolding device that are close to each other are placed and fixed on the step projecting into the vertical hole of the manhole. It is characterized by doing so.

The scaffolding structure according to claim 5 is characterized by a scaffolding device,
The scaffolding device is provided with a fall prevention device that hooks on a step in the manhole.

The scaffolding structure according to claim 6 is also characterized by a scaffolding device, and the lower surfaces of the one ends of both supporting legs of the scaffolding device that approach each other are placed on the step of projecting into the vertical hole of the manhole. At the same time, the other ends of the support legs, which are separated from each other, are inclined upward in the height direction of the manhole so as to be fixed in the vertical hole of the manhole.

The scaffold structure according to claim 7 is characterized by the placing plate according to claim 2, wherein the placing plate is composed of two semicircular dividing plates, and is inclined in the height direction of the manhole. The end portions of the two divided plates are placed on the upper surfaces of the two supporting legs so as to partially overlap with each other in the vertical direction.

The scaffolding structure according to claim 8 is characterized by both supporting legs of the scaffolding device, and elastic members are respectively fixed to the four end portions of both supporting legs.

The scaffolding structure according to claim 9 is also characterized by both supporting legs of the scaffolding device, and the lengths of both supporting legs can be adjusted respectively.

The scaffolding structure according to claim 10 is also characterized by both supporting legs of the scaffolding device, each end of the supporting legs facing each other,
It is characterized in that it is inclined along the circular inner circumferential surface of the vertical hole of the manhole into a plane C shape.

The scaffolding structure according to claim 11 is also characterized by both supporting legs of the scaffolding device, each end of both supporting legs along the circular inner peripheral surface of the vertical hole of the manhole, in the height direction. The feature is that they are inclined at an angle.

[Operation] According to the temporary scaffolding structure for the manhole according to the first aspect, the scaffolding device is fixed by utilizing the frictional resistance between the scaffolding device and the inner peripheral surface of the vertical hole of the manhole. In this way, the support from the bottom of the manhole is not required, and it can be made more compact than conventional rods and ladders, and its transportation and temporary installation / removal can be performed easily.

Further, the worker puts his / her foot on the scaffolding device in a state where he / she has stepped in the waste bag to perform the work. Therefore, concrete pieces, scraps, and the like that fall during the work fall into the waste bag and can be collected together with the waste bag after the work is completed.

According to the scaffold structure of the second aspect, the worker can put his / her foot on the mounting plate and perform the work safely and in a stable posture.

According to the scaffolding structure of claim 3, the two supporting legs are positioned in the middle of the vertical hole of the manhole, and the other ends of the two supporting legs are separated from each other by the adjusting member. Each end is brought into close contact with the circular inner peripheral surface of the vertical hole.

According to the scaffolding structure of the fourth aspect, the step in the manhole can be used as a support for the scaffolding device.

According to the scaffolding structure of the fifth aspect, the fall prevention device can prevent the scaffolding device from falling.

According to the scaffold structure of the sixth aspect, not only the steps in the manhole can be used as a support for the scaffolding device, but also the load applied to the scaffolding device can be efficiently dispersed to the steps.

According to the scaffold structure of the seventh aspect, the upper surface of the mounting plate can be flattened.

According to the scaffold structure of the eighth aspect, the elastic material can enhance the adhesion of the vertical hole of the manhole to the circular inner peripheral surface.

According to the scaffold structure of claim 9, not only can the lengths of both support legs be adjusted according to the diameter of the vertical hole of the manhole, but also the lengths of both support legs can be adjusted to be short during transportation. By doing so, the scaffolding device can be made compact.

According to the scaffolding structure of claim 10 and claim 11, it is possible to secure a wide contact area between each end of both supporting legs of the scaffolding device and the circular inner peripheral surface of the vertical hole of the manhole, and improve the adhesion. can do.

[Embodiment] The present invention will be described below based on an embodiment shown in the drawings.

1 is a longitudinal sectional view of a manhole, FIG. 2 is an exploded perspective view of parts used, FIG. 3 is a plan view of a scaffolding device, FIG. 4 is a side view of the same, and FIG. 5 is a transverse sectional view of a manhole. Show.

In the figure, 10 is a vertical hole constituting a manhole, 11 to 14 are vertical holes 10
Steps for raising and lowering provided inside, 20 is vertical hole of manhole 10
A scaffolding device for temporarily constructing a scaffold for construction inside the inner height, 30 is placed on the scaffolding device, and concrete pieces and debris (not shown) that fall into the mine at the time of work are collected Debris receiving bags 40 for disposing are provided between the scaffolding device 20 and the debris receiving bags 30 and respectively show mounting plates for securing the scaffolding of the workers.

First, the structure of the scaffolding device 20 will be described with reference to FIGS.

The scaffolding device 20 has a ladder shape in which the whole is opened in a V shape, and a pair of left and right support legs 50 and 60 facing each other in a V shape,
A connecting member 70, which is located between one ends of the supporting legs 50 and 60 that are close to each other, and which connects the other ends of the other ends of the supporting legs 50 and 60 that are spaced apart from each other so as to adjust the opening degree, and both supporting members. An adjusting member 80 for adjusting the opening degree is provided between the other ends of the legs 50 and 60, and adjustably connects the facing interval between the two supporting legs 50 and 60.

The support legs 50 and 60 have a bilaterally symmetrical structure about the center line 1 and their lengths are adjustable respectively.

As shown in FIG. 2, each of the support legs 50 and 60 has a hollow rectangular tube-shaped outer tube 90 and a rectangular tube shape that is slightly thinner than the outer tube 90, and is slidably inserted into the outer tube 90. It is composed of the inner cylinder 100 to be inserted,
With the inner cylinder 100 inserted in the outer cylinder 90, as shown in FIGS. 3 and 4, the inner cylinder 100 is penetrated from the outer surface of the outer cylinder 90, the bolts 110 are passed in series, and the nut 120 is used. Tighten and fix.

More specifically, the outer cylinder 90 and the inner cylinder 100 are
Using a steel square pipe, the total length of the outer cylinder 90 is set to 560 mm and the total length of the inner cylinder 100 is set to 400 mm.

Then, in the outer cylinder 90, as shown in FIGS. 2 and 4, through holes 91 to 94 are formed which penetrate the bolt 110 in a lateral direction. Further, the inner cylinder 100 communicates with the through holes 91 to 94,
Similarly, the communication holes 101 to 108 penetrating laterally are opened. Here, the outer cylinder 90 has a plurality of, for example, four through-holes 91 to 4 at equal intervals along the longitudinal direction thereof.
94 is established, and the interval is set to 20 mm, for example. Further, the inner cylinder 100 has a plurality of pieces at predetermined intervals along the longitudinal direction thereof.
For example, a total of eight communication holes 101-108 are opened. Then, among the communication holes 101 to 108, only the distance between the communication hole 104 and the communication hole 105 is wide, for example, set to 70 mm, and the rest are at equal intervals.
That is, the intervals are set equal to the through holes 91 to 94 of the outer cylinder 90.

In addition, the through holes 91 to 94 of the outer cylinder 90 and the communication holes 101 to 94 of the inner cylinder 100 to
Either one of 108 and 108 may be singular.

On the other hand, the tip of the outer tube 90 is cut diagonally in accordance with the circular inner peripheral surface of the vertical hole 10 of the manhole, and an elastic material, in this case a soft rubber 130, is fixed to the cut surface.

Similarly, the rear end of the inserted inner cylinder 100 is also obliquely cut in accordance with the circular inner peripheral surface of the vertical hole 10 of the manhole, and an elastic material, in this case, a soft rubber 131 is fixed to the cut surface.

Next, the connecting member 70 that connects the left and right support legs 50 and 60 will be described. The connecting member 70 is made of a steel square pipe that is cut in a short direction, and is oriented in a direction orthogonal to the center line 1. Deploy. Here, the total length of the connecting member 70 is 90
Set to mm, cut both left and right ends diagonally according to the opening degree of both support legs 50, 60, and contact both ends in parallel with the inner surface of each outer cylinder 90 of the left and right support legs 50, 60. I am trying.

In addition, the left and right end portions of the connecting member 70 have left and right support legs 50,
Fix the screw shafts 71 and 72 for fixing each outer cylinder 90 of 60. Both screw shafts 71, 72 are perpendicular to the cut surfaces at the left and right ends of the connecting member 70, that is, the left and right support legs 50,
Stand in a direction orthogonal to the longitudinal direction of each outer cylinder 90 of 60. On the other hand, the outer cylinders 90 of the left and right support legs 50 and 60 are provided with through holes 95 through which both screw shafts 71 and 72 pass, respectively, and the through holes 95 are formed in the respective through holes 95. , 72, respectively, and tighten the nuts 140, 141 from the outer surface of the outer cylinder 90 to fix them.
The insertion hole 95 has a larger inner diameter than the outer diameters of the screw shafts 71 and 72, so that the left and right support legs 50 and 60 can be opened with respect to the center line 1 while the nuts 140 and 141 are slightly loosened. Is adjustable.

On the other hand, the adjusting member 80 is configured so that its entire length can be shortened by using a screw. That is, the opening of the left and right support legs 50, 60 can be adjusted by increasing or decreasing the total length of the adjusting member 80. For example, if the length of the adjusting member 80 is increased, the left and right support legs 50,
When the opening of 60 increases, conversely, when it shortens, the opening decreases.

The structure of the adjusting member 80 will be described with reference to FIGS. 2 and 3. A hollow cylindrical support cylinder 81 and an open end of the support cylinder 81 are rotatably supported and a female screw is cut at the center thereof. A rotating ring 83 having a threaded hole 82, and a threaded rod 84 having a male screw threaded into the threaded hole 82 of the rotating ring 83,
It is arranged parallel to the above-mentioned connecting member 70, that is, in a direction orthogonal to the center line 1.

The support cylinder 81 is made by cutting a round steel pipe into short pieces. One end of the support cylinder 81 is either one of the left and right support legs 50, 60, and here, the support leg 60 located on the lower side of FIG. Outer cylinder 90
Weld to the inner surface of.

Further, the rotating ring 83 is also made of metal, and a pair of operating handles 85, 85 extending outwardly in the radial direction and facing back to each other are provided on the outer peripheral surface of the rotating ring 83, and the rotating rings 83 can be rotated by holding the handles 85, 85. I am trying.

The threaded rod 84 is formed by cutting an external thread on the outer circumference of a metal rod, and one end of the threaded rod 84 is located at the upper side of FIG.
It is erected on the inner side surface of the outer cylinder 90 so as to face the above-mentioned support cylinder 81.

Therefore, when the rotating ring 83 is rotated while holding the handles 85, 85, the threaded rod 84 moves back and forth in the axial direction due to the action of the screw. That is, when the rotating ring 83 is rotated in the screwing direction of the screw rod 84, the screw rod 84 advances into the hollow inside of the support cylinder 81. On the other hand, when the rotary ring 83 is rotated in the opposite direction, the screw rod 84 retracts from the hollow inside of the support cylinder 81.
By using the action of this screw, the total length of the connecting member 70 is adjusted, and by changing the distance between the left and right support legs 50, 60, the opening degree of both support legs 50, 60 is adjusted. I am able to do it.

On the other hand, in the figure, reference numeral 150 denotes a fall prevention device of the scaffolding device 20, and the fall prevention device 150 is used in the step 1 in the manhole.
It is hooked on any of 1 to 14 to prevent the scaffolding device 20 from falling downhole.

Specifically, as shown in FIGS. 2 and 3, the fall prevention device 150 includes a metal chain 151 whose one end is wound around the outer surface of the connecting member 70 and fixed, and a free end of the chain 151. The eggplant ring 152 is also made of metal with the tip of the part fixed, and is removable
It consists of and. Then, as shown in FIG. 1, the eggplant ring 152 is used by being hooked on the outer periphery of the steps 11 to 14 in the manhole, that is, the uppermost step 11 in this case.

As shown in FIG. 2, the waste bag 30 is, for example, a cloth bag, and has a cylindrical shape substantially equal to the inner diameter of the vertical hole 10 of the manhole. Specifically, a pair of relatively long left and right handles 31 and 31 are provided at the upper end of the opening of the waste bag 30, and both handles 31 can be held and pulled up from the manhole pit.

The waste bag 30 is not limited to cloth, but may be vinyl or cardboard.

As shown in FIG. 2, the mounting plate 40 is composed of two semicircular plate-shaped split plates 41, 42 made of wood, and by partially overlapping the split plates 41, 42 vertically, Vertical hole of manhole all around
The inner diameter of 10 is almost equal.

The mounting plate 40 is not limited to wood, and may be made of plastic or metal.

Further, in FIG. 2, reference numeral 160 denotes a bottom plate which is placed on the circular bottom of the waste bag 30 and has the same structure as the placing plate 40 described above. That is, the bottom plate 160 is composed of two wooden half-circular plate-shaped dividing plates 161, 162, and by partially overlapping both dividing plates 161 and 162, the entire circumference is the inner diameter of the waste bag 30. I try to be almost equal.

Note that the bottom plate 160 is not limited to wood like the mounting plate 40, and may be made of plastic or metal.

Next, the temporary procedure of the scaffold structure having the above-mentioned configuration
This will be described with reference to FIGS.

First, the scaffolding device 20 is lowered into the vertical hole 10 of the manhole, and the eggplant ring 152 of the fall prevention device 150 is hooked on the uppermost step 11 in the manhole mine.

Then, the end portions of the left and right support legs 50, 60 on the side of the scaffolding device 20 having the connecting member 70, that is, the lower end surfaces of the tip portions of the outer cylinders 90 are placed on the uppermost step 11. Further, the ends of the left and right support legs 50 and 60 on the side having the adjusting member 80, that is, each inner cylinder 90.
With the side up, the entire left and right support legs 50, 60 of the scaffolding device 20 are positioned at an angle with respect to the height direction of the manhole, as shown in FIG.

Next, the operating handle 85 of the adjusting member 80 of the scaffolding device 20,
By rotating 85, the total length of the adjusting member 80 is lengthened, and the openings of the left and right support legs 50, 60 are increased.

This allows the soft rubber 13 at each end of the left and right support legs 50, 60 to
0, 131 adheres to the circular inner peripheral surface of the vertical hole 10, and the scaffolding device is formed by the frictional resistance between the circular inner peripheral surface of the vertical hole 10 and the soft rubbers 130, 131.
20 is a vertical hole of the manhole as shown in FIG. 1 and FIG.
Fixed in the middle of 10 heights.

In this way, if the scaffolding device 20 is fixed in the manhole mine, the mounting plate 40 is put in the mine and the left and right support legs of the scaffolding device 20 are fixed.
Cross over each of the upper surfaces of 50 and 60 as shown in FIG.

As can be seen from the above description, the left and right support legs 50 and 60 of the scaffolding device 20 are fixed in a state of being obliquely inclined with respect to the height direction of the manhole. That is, the ends of the left and right support legs 50, 60 on the side having the connecting member 70 are low, and the ends of the left and right support legs 50, 60 on the side having the adjusting member 80 on the opposite side are high. Therefore, the two split plates 42 that make up the mounting plate 40,
One of 43, that is, the split plate 42 is placed on the lower side first, and the ends of the other split plate 43 are partially overlapped at the center,
Place it on the higher side so that the upper surfaces of both split plates 42, 43 are relatively horizontal.

Next, as shown in FIG. 1, the waste bag 30 is lowered into the mine, and the bottom thereof is placed on the upper surfaces of the two dividing plates 42 and 43 to fully open the bag.

Finally, the bottom plate 160 is put into the waste bag 30 and is located at the bottom of the waste bag 30. That is, both split plates 16 of the bottom plate 160
Similarly to the mounting plate 40 described above, the parts 1 and 162 are also partially overlapped vertically so that the upper surfaces of both are relatively horizontal.

Then, the worker enters the waste bag 30 to perform the work, and puts his / her feet on the upper surface of the bottom plate 160 at the bottom of the waste bag 30 to perform the work.

On the other hand, concrete pieces, scraps, and the like (not shown) that drop into the mine during the work drop into the scrap receiving bag 30. For this reason, concrete pieces, debris, etc. may accumulate in the debris bag 30 to some extent,
Alternatively, after the end of the work, the scrap catching bag 30 may be pulled up from the inside of the mine by holding the grips 31 and 31 of the scrap catching bag 30, and the concrete pieces and scraps accumulated inside may be discarded.

After the work is completed, the procedure opposite to the above-described temporary procedure, that is, the waste bag 30 and its bottom plate 160, the mounting plate 40, and the scaffolding device 20 may be pulled up from the mine in this order. Scaffolding equipment 20
By rotating the operating handles 85, 85 of the adjusting member 80 in the reverse direction, the total length of the adjusting member 80 is shortened, and the left and right support legs 50,
The opening of 60 also decreases and comes off.

[Advantages of the Invention] Since the present invention is configured as described above, it has the following effects.

According to the scaffolding structure for temporary construction in the manhole according to claim 1, the scaffolding device can be made compact as compared with the conventional one, so that not only can it be transported and temporarily installed / removed, but also concrete. Since it is possible to prevent falling of pieces and debris in the mine, it is possible to omit the cleaning accompanying it, and it is possible to shorten the work time, and also to prevent the cables etc. wired in the mine from being damaged in advance. You can

According to the scaffold structure of the second aspect, the worker can put his / her foot on the mounting plate and perform the work safely and in a stable posture.

According to the scaffolding structure of the third aspect, the scaffolding device can be easily installed and removed easily by adjusting the length of the adjusting member.

According to the scaffolding structure of the fourth aspect, it is possible to provide a highly safe scaffolding structure using the steps in the manhole.

According to the scaffold structure of the fifth aspect, it is possible to prevent the scaffolding device from dropping downhole during temporary installation or removal.

According to the scaffold structure described in claim 6, it is possible to provide a scaffold structure with higher safety.

According to the scaffold structure of the seventh aspect, it is possible to ensure the stability of the worker during the work.

According to the scaffolding structure described in claims 8 to 11, it is possible to provide a scaffolding structure which is safer and more excellent in stability.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a manhole, FIG. 2 is an exploded perspective view of parts used, and FIG.
The figure is a plan view of the scaffolding device, FIG. 4 is a side view thereof, and FIG. 5 is a cross-sectional view of the manhole. 10 …… Vertical holes that make up a manhole, 11 to 14 …… Steps for raising and lowering, 20 …… Scaffolding device, 30 …… Scrap bag, 40 …… Loading plate, 41, 42 …… Splitting plate, 50, 60 …… Support legs, 70 …… Coupling member, 80 …… Adjustment member, 130, 131 …… Soft rubber, 150…
… Fall prevention device.

Claims (11)

[Scope of utility model registration request] 1. A detachable scaffolding device which is fixed by frictional resistance with a circular inner circumferential surface of the manhole, in the middle of the height of the vertical hole, and a bottom is placed on the upper surface of the mounting plate. Is provided with a scrap bag opened in a circular shape along the circular inner peripheral surface of the vertical hole, and a scaffold structure for temporary installation in a manhole. 2. A circular mounting plate adapted to the circular inner peripheral surface of the vertical hole of the manhole is arranged between the upper surface of the mounting plate and the bottom of the waste bag. ) Temporary scaffolding structure in the manhole described. 3. A scaffolding device is located between a pair of left and right support legs facing each other in a V-shape, and one end portions of both support legs that are close to each other, and the other end portions of the other end portions of both support legs that are separated from each other. And an adjusting member for adjusting the opening, which is located between the other ends of the support legs and adjustably connects the facing distance between the support legs. The scaffolding structure for temporary construction in a manhole according to claim 1 or 2, characterized in that. 4. The lower surface of one end of each of the supporting legs of the scaffolding device that is close to each other is placed and fixed on a step projecting into a vertical hole of a manhole. ) Temporary scaffolding structure in the manhole described. 5. The scaffolding device for temporary installation in a manhole according to claim 4, wherein the scaffolding device is provided with a fall prevention device for catching a step in the manhole. 6. The lower surface of one end of both supporting legs of the scaffolding device is placed on the step of projecting into the vertical hole of the manhole, and the other ends of both supporting legs are separated from each other of the manhole. The scaffolding structure for temporary installation in a manhole according to claim 3, wherein the scaffolding structure is inclined upward in the height direction and is fixed in the vertical hole of the manhole. 7. The placing plate is composed of two semicircular dividing plates, and the end portions of the two dividing plates are vertically arranged on the upper surfaces of both supporting legs inclined in the height direction of the manhole. The scaffolding structure for temporary installation in the manhole according to claim 6, wherein the scaffolding structures are placed so as to overlap each other. 8. An elastic material is fixed to each of the four end portions of both supporting legs of the scaffolding device.
The scaffolding structure for temporary construction in the manhole according to any one of (7). 9. The scaffolding device according to claim 3, wherein the lengths of both supporting legs of the scaffolding device are adjustable.
The scaffolding structure for temporary construction in the manhole according to any one of 1. 10. The scaffolding device is characterized in that the opposite ends of both support legs are inclined along a circular inner peripheral surface of a vertical hole of a manhole into a plane C shape. The scaffolding structure for manholes according to any one of (3) to (9). 11. A scaffolding device according to claim 6, wherein each end of both supporting legs is slanted in the height direction along the circular inner peripheral surface of the vertical hole of the manhole. )~(Ten)
The scaffolding structure for temporary construction in the manhole according to any one of 1.