JP2007002481A - Handrail for manhole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handrail for a manhole which can be easily mounted when a worker goes into/out of the manhole via which the worker can go into/out of the manhole while securing safety, and enables a material etc. to be easily unloaded. <P>SOLUTION: This handrail for the manhole comprises a handrail mounting fitting 12 which is detachably or fixedly attached to the internal wall 11 of the manhole 10, and a handrail body 1 which is mounted to the fitting 12. The handrail body 1 is formed of an insertion part 2 which is inserted into the fitting 12, a horizontal part 3 which is elongated from the insertion part 2, and a handrail 4 which is elongated upward from the horizontal part 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a handrail for a manhole that can be easily moved in and out of the manhole by being installed at the entrance of the manhole when the worker performs an operation in the manhole.

  In general, in an urban area, an underground tunnel is formed, and a power cable, a communication cable, a gas pipe, or the like is often installed in the underground tunnel.

  And when a worker enters and leaves to maintain and manage this underground tunnel, a manhole communicating with the ground is generally used.

  When an operator enters or exits through this manhole, the operator opens the manhole cover, stretches out his legs while keeping his hand on the ground, and puts his feet on the ladder installed in the manhole hole. I entered the mine.

  However, in such a mine entry method, the attitude of the worker at the time of entering the mine is poor and it is difficult to see the feet, so there is a possibility that the worker loses balance and falls into the manhole.

  Therefore, as a means for avoiding such danger of the worker, there is a manhole ladder mounting tool and a manhole ladder device using the same as disclosed in JP-A-2005-2696.

The ladder device for manhole includes a support base that is detachably attached to an opening edge frame of the manhole, a handrail frame that is detachably or fixedly attached to the outside of the manhole of the support base, and a manhole of the support base. It is characterized by comprising a ladder support part provided inside.
JP 2005-2696 A

  However, in the above-described conventional manhole ladder device, since the support base to which the handrail frame is attached is fixed to the flange of the manhole, a special shape that matches the flange of the manhole is necessary and the flange exists. There is a problem that it cannot be used for manholes that do not.

  Further, the above-described conventional manhole ladder apparatus has a problem that it takes time to install the apparatus because it needs to be fastened with bolts from below to fix the support base to the flange of the manhole.

  In addition, when workers work at the bottom of manholes, tools and materials are often required, and in such cases, ropes or the like were used to send materials from the ground side. .

  At this time, the workers on the ground side grab the rope directly with their hands, get down on the manhole, and take down heavy tools and materials to the bottom of the manhole. It is necessary, and there is a risk that the worker may fall into the manhole because the work is performed in an unstable posture.

  Therefore, the present invention has been created in view of the above-described conventional problems. When a worker enters or exits a manhole, the manhole handrail is very easily attached, and the worker can connect via the manhole handrail. It is an object of the present invention to provide a manhole for a manhole that can enter and exit a manhole while ensuring safety, and can easily unload materials and the like by using the handrail for a manhole.

The handrail for manhole according to the present invention comprises a handrail mounting bracket that is detachably or fixedly attached to the inner wall of the manhole, and a handrail main body that is attached to the handrail mounting bracket,
The handrail main body is formed by an insertion portion inserted into the handrail mounting bracket, a horizontal portion extending from the insertion portion, and a handrail portion extending upward from the horizontal portion. The problem described above has been solved.

The handrail for a manhole according to the present invention comprises a handrail mounting bracket that is detachably or fixedly attached to the inner wall of the manhole, and a handrail body that is removably attached to the handrail mounting bracket.
The handrail main body includes a vertical insertion portion inserted into the handrail mounting bracket, a horizontal portion formed in a horizontal direction from the insertion portion, and a gate-type handrail portion raised vertically from the horizontal portion. The above-mentioned problem has been solved by forming integrally.

  Furthermore, the above-described problem has been solved by providing an unloading hook at the top of the handrail portion.

  Further, since the horizontal portion is provided with a horizontal bar, the above-described problem has been solved.

  In addition, in the state where the insertion portion of the handrail main body is inserted into the handrail mounting bracket, the horizontal portion of the handrail main body is in contact with the ground, thereby solving the above-described problem.

  Moreover, in the state which inserted the insertion part of the said handrail main body into the handrail mounting bracket, the problem mentioned above was solved because the horizontal part of the handrail main body is located in the hole of a manhole.

In addition, the handrail for manholes according to the present invention includes a frame-shaped support base formed larger than the hole diameter of the manhole, and a gate-type handrail body that is detachably or fixedly attached to the support base. Become
Since the support base is provided with an insertion portion for inserting the handrail main body, the above-described problem has been solved.

  Moreover, the above-mentioned subject was solved because the hook for unloading was provided in the top part of the said handrail main body.

  Furthermore, since the support base is formed in a circular frame shape, the above-described problem has been solved.

  Further, since the support base is formed in a rectangular frame shape, the above-described problem is solved.

In addition, the handrail for a manhole according to the present invention is attached to a support base formed by two rod-shaped members arranged so as to straddle the manhole, and to be detachable or fixed in a vertical direction of the support base. And a gate-shaped handrail body,
Since the support base is provided with an insertion portion for inserting the handrail main body, the above-described problem has been solved.

  Moreover, the above-mentioned subject was solved because the hook for unloading was provided in the top part of the said handrail main body.

  Furthermore, the two rod-shaped members constituting the support base are connected via a support bar, thereby solving the same problem as described above.

  Moreover, the said handrail main body was provided with the horizontal bar, and solved the same problem as described above.

  A handrail for a manhole according to the present invention comprises a handrail mounting bracket that is detachably or fixedly attached to an inner wall of the manhole, and a handrail body that is attached to the handrail mounting bracket, and the handrail body includes the handrail mounting bracket. It is formed by the insertion part inserted in, the horizontal part extended from the said insertion part, and the handrail part extended upwards from the said horizontal part.

  As a result, the handrail main body can be easily attached to the manhole simply by inserting the handrail main body into the handrail mounting bracket attached to the inner wall of the manhole. Therefore, when the worker enters and exits the manhole, the worker can enter and exit the manhole while ensuring safety without being dropped by holding the handrail body.

  In addition, since the handrail for manhole according to the present invention is provided with an unloading hook, when an operator enters and exits the manhole, the end of the safety rope attached to the body is fixed to the unloading hook. Therefore, it is possible to safely enter and exit the manhole by workers.

  Furthermore, when lifting / lowering the load in the manhole, the unloading rope can be passed through the unloading hook, so that the operation is safe and the worker can easily perform the operation.

  In addition, since the pulley can be attached to the unloading hook, the lifting and unloading work of the load can be performed more smoothly.

  Further, the handrail for manhole according to the present invention comprises a circular support base formed larger than the hole diameter of the manhole, and a gate-type handrail main body that is detachably or fixedly attached to the support base. The support base is provided with an insertion part for inserting the handrail main body.

  As a result, the handrail main body can be fixed above the manhole simply by placing the support base around the manhole. For example, the handrail can be used in a manhole in which no handrail mounting bracket is attached. This manhole handrail can be installed very simply by simply placing the support base on the manhole, and, like the manhole handrail described above, while ensuring the safety of the worker In addition to entering and exiting manholes, you can easily lift and lower your luggage.

  Furthermore, the handrail for a manhole according to the present invention is a support base formed by two rod-shaped members arranged so as to straddle the manhole, and is detachably or fixedly attached to the support base in a vertical direction. It comprises a gate-type handrail body, and the support base is provided with an insertion portion for inserting the handrail body.

  As a result, since the handrail main body can be fixed above the manhole simply by placing the support base so as to straddle the manhole, for example, it can be used for a manhole in which no handrail mounting bracket is attached in the manhole. Further, this manhole handrail can be installed very simply by simply placing a support base on the manhole. When the unloading hook is used, the support base is moved so that the unloading hook is located at the center of the manhole.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing a manhole handrail according to a first embodiment of the present invention, FIG. 2 is a perspective view showing a use state of the manhole handrail shown in FIG. 1, and FIG. 3 is another view of the manhole handrail shown in FIG. FIG. 4 is a perspective view showing an enlarged main part showing another use state of the manhole handrail shown in FIG. 1, and FIG. 5 shows a second embodiment of the manhole handrail according to the present invention. FIG. 6 is a perspective view showing a third embodiment of the manhole handrail according to the present invention.

  FIG. 1 shows a first embodiment of a manhole handrail according to the present invention. The handrail A for manholes includes a handrail mounting bracket 12 that is detachably or fixedly attached to the inner wall 11 of the manhole 10 and a handrail body 1 that is detachably attached to the handrail mounting bracket 12.

  The handrail main body 1 includes a downward insertion portion 2 to be inserted into the handrail mounting bracket 12, a horizontal horizontal portion 3 extending from the insertion portion 2, and an upper portion extending from the horizontal portion 3. It is formed by the upward handrail part 4

  More specifically, the handrail body 1 includes two vertical insertion portions 2 inserted into the handrail mounting bracket 12, a horizontal portion 3 formed in a horizontal direction from the insertion portion 2, and the horizontal portion. A gate-shaped handrail portion 4 raised vertically from 3 is integrally formed.

  The horizontal portion 3 that is horizontally oriented is attached to the insertion portion 2 at an angle of 90 degrees. However, the horizontal portion 3 is not limited to this, and is slightly upward with respect to the insertion portion 3. Also included are those mounted with a slight downward slope.

  Further, as shown in FIG. 2, between the horizontal portions 3 of the handrail body 1, the handrail body 1 is reinforced, and at the same time, the horizontal bar 5 is welded or the like so as to be gripped by the hand when the worker M enters and leaves. It is attached using. Further, an unloading hook 6 is attached to the top of the handrail body 1 by means of welding or the like.

  As shown in FIG. 1, the handrail main body 1 configured as described above is inserted and fixed to the handrail mounting bracket 12 of the manhole 10. Therefore, the handrail mounting bracket 12 includes an insertion tube 12a into which the insertion portion 2 of the handrail main body 1 is inserted, and an attachment plate 12b formed integrally with the insertion tube 12a. Ten inner walls 11 are fastened. The handrail mounting bracket 12 is configured such that two insertion cylinders 12a are arranged on the inner wall 11 of the manhole 10 with a predetermined interval.

  This handrail mounting bracket 12 is fixed to the inner wall 11 of the manhole 10 in advance when it is installed on the site in the company, such as a manhole 10 in a substation that frequently uses the handrail body 1. . A plurality of steps 13 are attached to the inner wall 11 of the manhole 10 so that the worker M can easily move up and down.

  The handrail A for manholes configured as described above is easy for anyone by simply fixing the handrail mounting bracket 12 to the inner wall 11 of the manhole 10 and inserting the insertion portion 2 of the handrail body 1 into the handrail mounting bracket 12. The manhole handrail A can be mounted on the manhole 10.

  When using the manhole handrail A configured as described above, as shown in FIG. 2, the lid 14 of the manhole 10 is first removed, and the difference between the handrail main body 1 and the handrail mounting bracket 12 previously attached to the manhole 10 is removed. The bayonet 2 is inserted and the manhole handrail A is fixed to the manhole 10. Thus, in a state where the insertion portion 2 of the handrail body 1 is inserted into the handrail mounting bracket 12, the horizontal portion 3 of the handrail body 1 is in contact with the ground.

  Next, the worker M fixes the end of the safety rope 7 wound around his / her body to the unloading hook 6 of the handrail main body 1 and puts the body into the manhole 10 while being held by the handrail main body 1 and the horizontal bar 5. The foot is put on the step 13 in the manhole 10 and gradually descends in the manhole 10.

  As described above, by using the handrail A for manholes, the danger of the worker M falling in the manhole 10 is avoided, and the safety of work is ensured. In addition, the worker M can enter and exit the manhole 10 with an easy posture. Furthermore, by using the safety rope 7, it is possible to reliably avoid the danger of the worker M falling and to enter and exit the manhole 10 more safely.

  Next, with reference to FIG. 3 and FIG. 4, the usage method of the unloading hook 6 of the handrail A for manholes is demonstrated.

  The manhole handrail A is attached to the manhole 10 shown in FIG. 3 with the handrail body 1 facing away from the above-described FIGS. 1 and 2, and the unloading hook 6 of the handrail body 1 is attached to the manhole 10. It is located near the center. That is, the horizontal portion 3 of the handrail main body 1 is positioned in the hole of the manhole 10 in a state where the insertion portion 2 of the handrail main body 1 is inserted into the handrail mounting bracket 12. At such a position, the unloading hook 6 is passed through the unloading rope 8 and the work load 9 or the like is suspended from the unloading rope so that it can be lifted and lowered.

  Further, the manhole handrail A shown in FIG. 4 has the handrail main body 1 attached in the same manner as in FIG. 3 so that the unloading hook 6 is positioned in the vicinity of the center of the manhole 10, and the unloading hook 6 has a pulley. 15 is attached and the unloading rope 8 is passed through.

  Since the unloading hook 6 of the manhole handrail A configured as described above can support the weight of the load 9 such as tools and materials by the unloading hook 6, it is necessary for the worker M to directly support it with the body. The baggage 9 can be lifted and lowered in a stable state. Further, the baggage 9 can be smoothly raised and lowered while ensuring the safety of the worker M. Furthermore, when the pulley 15 is attached to the unloading hook 6, the load 9 can be lifted and lowered more smoothly while ensuring the safety of the worker M.

  On the other hand, FIG. 5 shows a second embodiment of the handrail for a manhole according to the present invention. The manhole handrail B includes a support base 21 formed in a circular frame shape larger than the hole diameter of the manhole 10 and a gate-type handrail main body 20 that is detachably or fixedly attached to the support base 21. It consists of. The support base 21 is provided with an insertion portion 21 a for inserting an end portion of the handrail main body 20, and an unloading hook 22 is provided at the top of the handrail main body 20. A horizontal bar 24 is provided between the vertical portions 23 of the handrail body 20.

  Since the handrail B for manholes configured as described above can fix the handrail body 20 above the manhole 10 simply by placing the support base 21 around the manhole 10, for example, the handrail mounting bracket is provided in the manhole 10. It can also be used for a manhole 10 to which 12 is not attached. The manhole handrail B can be installed very simply by simply placing the support base 21 on the manhole 10, and, like the manhole handrail A described above, While ensuring safety, the manhole 10 can be entered and exited, and the luggage 9 can be easily raised and lowered.

  FIG. 6 shows a third embodiment of the manhole handrail according to the present invention. The handrail C for manholes includes a support base 31 formed by two rod-shaped members 31A and 31B arranged in parallel so as to straddle the manhole 10, and is detachable or fixed in the vertical direction of the support base 31. And a gate-type handrail body 30 attached to the door.

  The support base 31 is provided with an insertion portion 31 a for inserting an end portion of the handrail main body 30 and a support bar 35. Further, an unloading hook 32 is provided at the top of the handrail body 30, and a horizontal bar 34 is provided between the vertical portions 33.

  For example, the handrail C for manholes configured in this way can fix the handrail main body 30 above the manhole 10 only by placing the support base 31 so as to straddle the manhole 10. It can also be used for the manhole 10 to which the mounting bracket 12 is not attached. Further, the manhole handrail C can be installed very simply by simply placing the support base 21 on the manhole 10. When the unloading hook 32 is used, the support base 31 is moved so that the unloading hook 32 is positioned near the center of the manhole 10.

  The manhole handrail C installed in this way allows the worker M to enter and exit the manhole 10 while ensuring safety, as well as the manhole handrails A and B described above, and to easily lift and lower the luggage 9. It can be done.

  In the present invention, when the worker enters and exits the manhole, the manhole handrail is attached very easily, and the worker can enter and exit the manhole while ensuring safety through the manhole handrail, This manhole handrail is widely used in various manholes as a manhole handrail capable of easily unloading materials and the like.

It is a perspective view which shows 1st Embodiment of the handrail for manholes which concerns on this invention. It is a perspective view which shows the use condition of the handrail for manholes of FIG. It is a perspective view of the principal part expansion which shows the other use condition of the handrail for manholes of FIG. It is a perspective view of the principal part expansion which shows the other use condition of the handrail for manholes of FIG. It is a perspective view which shows 2nd Embodiment of the handrail for manholes which concerns on this invention. It is a perspective view which shows 3rd Embodiment of the handrail for manholes which concerns on this invention.

Explanation of symbols

A Handrail for manhole B Handrail for manhole C Handrail for manhole M Worker 1 Handrail main body 2 Insertion section 3 Horizontal section 4 Handrail section 5 Horizontal bar 6 Unloading hook 7 Safety rope 8 Unloading rope 9 Luggage 10 Manhole 11 Inner wall 12 handrail mounting bracket 12a plug cylinder 12b mounting plate 13 step 14 lid 15 pulley 20 handrail main body 21 support base 21a insertion portion 22 unloading hook 23 vertical portion 24 horizontal bar 30 handrail main body 31 support base 31a insertion portion 31A Bar-shaped member 31B Bar-shaped member 32 Unloading hook 33 Vertical portion 34 Horizontal bar 35 Support bar

Claims (14)

It consists of a handrail mounting bracket that is detachably or fixedly attached to the inner wall of the manhole, and a handrail main body that is attached to the handrail mounting bracket,
The handrail main body is formed by an insertion portion inserted into the handrail mounting bracket, a horizontal portion extending from the insertion portion, and a handrail portion extending upward from the horizontal portion. Characteristic handrail for manholes. A handrail mounting bracket that is detachably or fixedly attached to the inner wall of the manhole, and a handrail body that is removably attached to the handrail mounting bracket.
The handrail main body includes a vertical insertion portion inserted into the handrail mounting bracket, a horizontal portion formed in a horizontal direction from the insertion portion, and a gate-type handrail portion raised vertically from the horizontal portion. A manhole handrail characterized in that is integrally formed.   The handrail for manholes according to claim 1 or 2, wherein a hook for unloading is provided on a top portion of the handrail portion.   The handrail for manholes according to claim 1 or 2, wherein a horizontal bar is provided in the horizontal portion.   The handrail for manholes according to claim 1 or 2, wherein the horizontal portion of the handrail body is in contact with the ground in a state where the insertion portion of the handrail body is inserted into the handrail mounting bracket.   The handrail for manholes according to claim 1 or 2, wherein a horizontal portion of the handrail main body is located in a hole of the manhole in a state where the insertion portion of the handrail main body is inserted into the handrail mounting bracket. It consists of a frame-shaped support base formed larger than the hole diameter of the manhole, and a gate-type handrail body that is detachably or fixedly attached to the support base.
A manhole handrail, wherein the support base is provided with an insertion portion for inserting the handrail main body.   8. The manhole handrail according to claim 7, wherein an unloading hook is provided on a top portion of the handrail main body.   The manhole handrail according to claim 7, wherein the support base is formed in a circular frame shape.   The handrail for manholes according to claim 7, wherein the support base is formed in a rectangular frame shape. A support base formed by two rod-shaped members arranged so as to straddle the manhole, and a gate-type handrail main body that is detachably or fixedly attached in the vertical direction of the support base,
A manhole handrail, wherein the support base is provided with an insertion portion for inserting the handrail main body.   The handrail for manholes according to claim 11, wherein a hook for unloading is provided on a top portion of the handrail main body.   The handrail for manhole according to claim 11, wherein the two rod-shaped members constituting the support base are connected via a support bar.   The handrail for manholes according to claim 11, wherein the handrail main body is provided with a horizontal bar.

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