JP2012046998A - Safe guard fence and safe guard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safe guard fence and a safe guard device, capable of being also used for openings different in size and/or shape and capable of surely preventing intrusion from the opening.SOLUTION: A safe guard fence 1 includes two pipes 11 which have central portions turnably connected like crossing bracing by a connecting pin 13, and eyebolt-like locking implements 21 which are expandably/contractibly attached to both ends 15 of the pipe 11 via screws. The safe guard fence 1 can be used by being attached to openings formed in various sizes and/or shapes, by the above constitution. Even in the case of the opening like a manhole, the safe guard fence 1 can be easily and surely attached by hooking the locking implement 21 on a bolt of the manhole and attaching a nut from above. Since the attached guard fence 1 cannot be easily detached, intrusion from the opening and the thrust of a person's face into the opening can be surely prevented.

Description

  The present invention relates to a safety protection fence and a safety protection device that prevent attachment to an opening such as an open manhole.

  Access to dangerous areas such as openings at building sites is usually prohibited by laying a rope or installing a safety fence. When repairing a tank, a rope, tape or net is often attached to an open manhole to prevent unauthorized entry from the manhole. When the inside of the tank is deficient in oxygen, it is important not only to prevent the entry into the interior but also to prevent the entry of the face, as it can lead to a serious accident just by pushing the face through the manhole. . It is also important to place signs and call attention.

  Regarding safety fences installed in manholes, safety fences that can be folded and stored in machine rooms have been developed as safety fences for manholes connected to the machine room provided under the floor of the escalator entrance (for example, see Patent Document 1). . Also, for oxygen deficiency in the tank, there is an oxygen deficiency prevention device that detects the manhole opening and the water level in the tank with a workable water level and sends air into the tank from the air blower (For example, refer to Patent Document 2).

JP-A-7-102789 Japanese Utility Model Publication No. 61-198388

  Unlike a manhole on the ground, when a rope, tape or net is attached to an open manhole on the wall of a tank or large device to prevent intrusion into the tank or large device, the rope is securely fixed. In many cases, there is no place to fix or a member to fix, so that it is temporarily fixed using a manhole bolt or the like. For this reason, there is a possibility that the attached rope or the like may come off. In addition, since there is no frame for attaching the sign, the sign is often affixed to the side of the manhole with tape, but it may be peeled off.

  The safety fence described in Patent Document 1 seems to be useful as a safety fence for a manhole provided in the machine room of the escalator, but cannot be applied to a manhole provided on a wall surface of a tank or the like. The technique described in Patent Document 2 is a technique useful for preventing oxygen deficiency in a tank or the like, but is not a technique for preventing entry from a manhole. If the tank is deficient in oxygen, not only entering the tank but also pushing a face into the manhole will lead to a serious accident, so safety protection that can reliably prevent intrusion from an open manhole, etc. Fences and safeguards are awaited. It would be efficient and preferable if one safeguard fence and safeguard device can be used for openings of different sizes and shapes.

  An object of the present invention is to provide a safety protection fence and a safety protection device that can be used for openings of different sizes and / or shapes and can reliably prevent intrusion from the openings.

  The present invention has two rod-like bodies each having a locking tool that can be expanded and contracted in the axial direction, and the center portions of the two rod-like bodies are rotatably connected by a connecting pin. It is a safeguard fence.

  Moreover, this invention is a safety protection apparatus characterized by including the said safety protection fence and the display body latchable to the rod-shaped body of the said safety protection fence.

  Since the safety guard fence of the present invention has two locking rods connected to each other by a connecting pin and has a locking tool that can be expanded and contracted in the axial direction at both ends, the openings of various sizes and / or shapes Can be used for mounting. Since the rod-shaped body is provided with a locking tool at both ends, even if it is an opening like a manhole, it can be easily and surely attached by hooking the locking tool onto the bolt of the manhole and attaching a nut from above. . The attached safety guard fence is not easily detached, and it is possible to reliably prevent the entry from the opening and the face from being pushed into the opening.

  Further, since the safety protection device of the present invention has a display body that can be locked to the rod-shaped body of the safety protection fence, it is possible to easily and reliably install the display body, such as an opening in an oxygen-deficient place, etc. Can be suitably used.

It is a perspective view of the safeguard fence 1 which is 1st Embodiment of this invention. It is a perspective view of the safety protection fence 2 which is 2nd Embodiment of this invention. It is a figure which shows the state which attached the safety protection apparatus 5 which is 3rd Embodiment of this invention so that the manhole 50 might be covered. It is a figure which shows the state which attached the safety protection apparatus 5 which is 3rd Embodiment of this invention to the side of the manhole 50. FIG.

  FIG. 1 is a perspective view of a safety protection fence 1 according to the first embodiment of the present invention. The safety protection fence 1 is composed of two pipes 11 whose center portions are pivotally connected by connecting pins 13 so as to cross each other, and eyebolts attached to both end portions 15 of the pipe 11 via screws. The locking tool 21 is included.

  The two pipes 11 are the same metal pipes, each of which has a through hole (not shown) at the center of the pipe 11, and the connecting pin 13 is inserted through the through hole in a state where the pipes 11 are stacked. The pipe 11 is rotatably connected by the connecting pin 13. For this reason, the pipe 11 connected by the connecting pin 13 can take a linear shape, an X shape, or a cross shape in plan view. A female screw (not shown) is provided inside the both end portions 15 of the pipe 11. The pipe 11 is not limited to a specific pipe, and a general-purpose pipe can be used. The surface of the pipe 11 is painted alternately with yellow 17 and black 18 to call attention. The surface of the pipe 11 does not necessarily need to be color-coded, but color-coding is a preferable method that can draw attention, and in addition to the color-coding of yellow 17 and black 18, color-coding of red and white may be performed.

  The locking tool 21 is made of a metallic member, and includes a ring-shaped locking portion 23 and a shaft portion 25 provided with a male screw connected to the locking portion 23. The four locking tools 21 are all the same. The ring-shaped locking portion 23 has a size that can be inserted into a bolt to be inserted into the bolt and locked to the bolt when used. The shaft portion 25 is externally threaded from the end of the anti-locking portion (not shown) to the vicinity of the locking portion 23 and is provided at both end portions 15 of the pipe 11 so as to be screwed into the screw (not shown). For this reason, the locking tool 21 can be moved in the axial direction of the pipe 11, and the distance between the locking portions 23 at both ends of one pipe 11 can be expanded and contracted. Furthermore, the distance from the connecting pin 13 to the locking portion 23 can be set to a different distance between the four locking tools 21. When the pipe 11 and the locking tool 21 are connected by a screw, the distance from the connecting pin 13 to the locking part 23 can be easily adjusted, and the pipe 11 and the locking tool 21 are firmly connected. It is preferable as a safety protection fence because it is not easily deformed even against a force perpendicular to the axial direction of the pipe 11.

  FIG. 2 is a perspective view of the safety protection fence 2 according to the second embodiment of the present invention. The same members as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, the description will focus on differences from the first embodiment. To do.

  The safety protection fence 2 has the same basic configuration as the safety protection fence 1 of the first embodiment, but the configuration of the locking tool 22 is different. The locking tool 22 is made of a metallic member, and includes a hook-shaped locking portion 24, a rod-shaped shaft portion 26 connected to the locking portion 24, and a spring 28. The hook-shaped locking portion 24 is large enough to be locked to the bolt. The shaft portion 26 is a round bar having an outer diameter slightly smaller than the inner diameter of the pipe 11, and can slide in the pipe 11 in the axial direction. The shaft portion 26 may be a pipe. The spring 28 is a tension spring, is housed in the pipe 11, has one end fixed to the pipe 11, and the other end connected to the end of the shaft portion 26. Therefore, when the locking portion 24 is pulled toward the anti-connection pin 13 side of the pipe 11, the spring 28 is extended and the shaft portion 26 is pulled out from the inside of the pipe 11. Thereby, the distance between the latching | locking parts 24 of the both ends of one pipe 11 can be expanded-contracted. Furthermore, the distance from the connection pin 13 to the latching | locking part 24 can also be made into a different distance by the four latching tools 22. FIG. In the safety protection fence 2 according to the second embodiment, the locking tool 22 is connected to the pipe 11 via the spring 28 so as to be stretchable and slidable. Therefore, the distance from the connecting pin 13 to the locking portion 24 is adjusted. Is very easy to use.

  As a modification of the locking tool 22, the shaft portion 26 may be a pipe having an inner diameter slightly larger than the outer diameter of the pipe 11, and the outside of the pipe 11 may be slid in the axial direction. At this time, the spring 28 is housed in the shaft portion 26, and one end is fixed to the end portion of the pipe 11 and the other end is fixed to the vicinity of the locking portion 24 in the shaft portion 26. Further, the spring 28 may be a compression coil spring instead of the tension spring.

  FIG. 3 is a view showing a state in which the safety protection device 5 according to the third embodiment of the present invention is attached so as to cover the manhole 50.

  The safety protection device 5 includes the safety protection fence 1 shown in the first embodiment and a display body 31 that is used while being locked to the safety protection fence 1. In addition, it may replace with the safety protection fence 1 shown in 1st Embodiment, and may use the safety protection fence 2 shown in 2nd Embodiment.

  The display body 31 includes a display plate 33 and a thin box-shaped storage box 35 that stores the display plate 33. The display board 31 is a plate-like body in which the front and back surfaces can be written with a writing instrument. The storage box 35 has substantially the same space as the display plate 33, and an upper portion 37 is opened to store the display plate 33. Further, the surface is opened leaving the peripheral edge 39 so that the stored display board 33 can be seen from the outside. Further, a hook (not shown) for locking the pipe 11 of the safety protection fence 1 is provided on the back surface of the storage box 35. The display 31 is composed of a display plate 33 and a thin box-shaped storage box 35 for storing the display plate 33, and the display plate 33 is stored in the storage box 35 so that it can be inserted into and removed from the display box 33. The back side is also available and efficient.

  An example of use of the safety protection device 5 will be described. The safety protection fence 1 is attached to the opened manhole 50 using a bolt 52 for stopping a lid (not shown) of the manhole 50 provided in the manhole 50. The locking tool 21 of the safety protection fence 1 is expanded and contracted according to the distance between the opposing bolts 52. The safety fence 1 is made into an X shape, and after the four locking portions 23 are inserted into the bolts 52, the washers 54 are covered and nuts 56 are attached to the bolts 52. Thereafter, the storage box 35 storing the display board 33 describing necessary items is attached to the safety protection fence 1 using a hook (not shown). In addition, it can replace with the safeguard fence 1, and when using the safeguard fence 2 shown in 2nd Embodiment, it can be used in the same procedure. In such a safety protection device 5, the safety protection fence 1 is not easily deformed, and since the attachment method is also locked to the bolt 52 and stopped by the nut 56, it is not easily detached after the attachment. In addition, when using the safety protection fence 2, since the locking tool 23 is always pulled toward the center part of the pipe 11 with the spring 28, it does not come off easily even if the nut 56 is not attached.

  Another example of use of the safety protection device 5 will be described. FIG. 4 is a view showing a state in which the safety protection device 5 is attached to the side of the manhole 50. FIG. 3 shows a state in which the safety protection device 5 is attached to the opened manhole 50 in order to prevent intrusion from the opened manhole 50, whereas FIG. 4 shows that work is performed in a tank (not shown). It is an example of use in the state which is performed. The safety in the tank is ensured, and the manhole 50 is in an open state because workers enter and exit the tank. In this case, after the two locking portions 23 are inserted into the bolts 52 of the manhole 50 so that the safety protection fence 1 does not block the manhole 50 and is positioned beside the manhole 50, the washer 54 is covered and the nut 56 is put on the bolt 52. Install. Thereafter, the storage box 35 storing the display board 33 describing necessary items is attached to the safety protection fence 1 using a hook (not shown). The safety protection fence 1 in such a safety protection device 5 functions as a mounting base for the display body 31.

  As shown in the first and second embodiments, the safety protection fences 1 and 2 are configured such that two pipes 11 are rotatably connected by a connecting pin 13, and the locking tools 21 and 22 are in the axial direction of the pipe 11. Since it can extend and contract, one safety guard fence 1, 2 can be used for manholes 50 having different sizes and / or shapes. The manhole 50 includes an ellipse and a rectangular manhole 50 in addition to a circle, but can also be used for such a manhole 50. Further, depending on the manhole 50, there is a manhole 50 of a type in which a lid for closing the manhole 50 is attached to the manhole 50 by a hinge and can be opened / closed but cannot be removed. Since the locking portions 23 and 24 of the safety protection fences 1 and 2 may be hooks, they can be used for such a manhole 50 as well. When the manhole 50 is large and vertically long, two or more safety protection fences 1 and 2 may be attached.

  In the safety protection fence 1 of the first embodiment, the locking portions 23 are all rings, and in the safety protection fence 2 of the second embodiment, the locking portions 24 are all hooks. The locking portions 24 may be mixed. Although the manhole 50 may be hot depending on the use destination, since the safety protection fences 1 and 2 are made of metal, they can be used for the manhole 50 in a high temperature state. When the manhole 50 whose temperature is about the outside air temperature is targeted, the spring 28 can be made of rubber in the safety protection fence 2 of the second embodiment.

  The safety protection fence and the safety protection device of the present invention are not limited to the above-described embodiment, and two pipes are rotatably connected by a connection pin, and locking tools attached to both ends of the pipe are axially connected. You may change a structure in the range which does not change the characteristic part which can be moved to. Moreover, in the said embodiment, although the example of application to the opened manhole was shown, the safeguard fence and the safeguarding device of this invention should be used suitably for an inspection opening other openings without being limited to a manhole. Can do.

DESCRIPTION OF SYMBOLS 1, 2 Safety protection fence 5 Safety protection apparatus 11 Pipe 13 Connection pin 15 Both ends 17 of a pipe 17 Yellow 18 Black 21, 22 Locking tool 23, 24 Locking part 25, 26 Shaft part 28 Spring 31 Display body 33 Display board 35 Storage box 37 Upper part of storage box 39 Perimeter of storage box surface 50 Manhole 52 Bolt 54 Washer 56 Nut

Claims (2)

  Safety protection characterized in that it has two rod-like bodies each having a locking tool that can be expanded and contracted in the axial direction, and the central portions of the two rod-like bodies are rotatably connected by a connecting pin. fence. A safeguard fence according to claim 1;
A display body that can be locked to the rod-shaped body of the safety protection fence;
A safeguarding device characterized by comprising:

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