JP2008057145A - Safety fence for opening with floor lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety fence for an opening with a floor lid which is favorable in workability, and can be easily manufactured. <P>SOLUTION: This safety fence for the opening with the floor lid is equipped with safety fence structures which are arranged in such a manner as to surround four sides of the opening, respectively. Each of the safety fence structures comprises: a plurality of supports: brackets which are fixed near lower ends of the supports around the opening, respectively; and a rod which is inserted through a hole formed at each of the brackets, the one end of which is fixed to the lower end of the support at one end, and the other end of which is fixed to the lower end of the support at the other end. Each of the supports can be turned on the longitudinal axis line of the rod. A torsion imparting mechanism which is constituted so that torsion can be imparted to the rod when the support is brought down is arranged in each of the safety fence structures. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention generally relates to a safety fence for an opening with a floor lid. More specifically, the present invention relates to a safety fence for an opening with a floor lid that has good workability and is easy to manufacture.

  In a multi-story building such as a sewage treatment facility, an opening for carrying in / out equipment is provided on the floor of each floor. Such an opening is normally closed by a plurality of floor covers and is effectively used as a passage. In addition, such an opening is installed so as to be uniform with the floor surface in order to prevent rolling, and usually does not require safety equipment such as a handrail.

  On the other hand, when loading and unloading equipment using the opening, the floor covers divided into multiple types must be removed one by one by two workers. There is a risk that an operator may fall from the opening or drop the floor cover, etc., and this is a very dangerous operation.Therefore, it is common to install a handrail around the opening before removing the floor cover. is there. However, such a method is an unnatural work of extending the hand from the outside of the handrail, the floor cover must be taken out of the handrail, and the floor cover may be dropped from the opening, such as a handrail Since there are various inconveniences such as inefficiency of work because it requires carrying in / out of safety equipment and assembly / disassembly work, various methods for curing the opening have been proposed.

  For example, in Patent Document 1, a bar having a flat end is fitted to a slit of a horizontal beam, and the end of the bar is clamped by an opposing clamping piece provided inward in the slit. A safety fence is disclosed which is adapted to be held in the housing. Patent Document 2 discloses that the area of the hatch can be used effectively, equipment can be carried in and out of the place where the ceiling is low, workers can enter the hatch, and even a narrow hatch is sufficient. A hatch safety fence having a certain height is disclosed.

JP-A-5-193705 JP-A-9-256658

  However, in the safety fence described in Patent Document 1, it is necessary to assemble and disassemble the handrail every time the work is performed, and thus there is a problem that the work is troublesome and very inefficient. Moreover, in the safety fence described in Patent Document 2, when remodeling an existing facility, it is necessary to hang the beam structure around the floor opening, which leads to insufficient strength of the building structure. There are challenges. Thus, the present condition is that there is no satisfactory thing in the conventional safety fence for openings.

  The present invention has been devised in view of such a situation, and an object of the present invention is to provide a safety cover for an opening with a floor lid that has good workability and is easy to manufacture.

  The safety fence for an opening with a floor cover according to claim 1 of the present application includes safety fence structures respectively disposed so as to surround four sides of the opening, and each safety fence structure includes a plurality of support columns, A bracket fixed near the lower end of each column around the opening, and a hole provided in each bracket, with one end fixed to the lower end of the column at one end and the other end at the other end Rods fixed to the lower ends of the columns, and each column rotates about the longitudinal axis of the rods. A torsion imparting mechanism configured to impart torsion is disposed.

  The safety fence for an opening with a floor cover according to claim 2 of the present application is the safety fence according to claim 1, wherein the torsion imparting mechanism is configured so that one of the bracket and a predetermined position of the rod is in an upright state of the support column Are integrated so that when the support column is tilted, the rod is twisted.

  According to the present invention, since a safety fence is provided at the floor lid location in the existing opening equipment with a floor lid, it is possible to prevent damages such as falling or falling of an operator or the floor lid during work. In addition, the safety fence for an opening with a floor lid according to the invention can be used in a newly installed facility. In addition, since the torsion imparting mechanism is arranged in the safety fence of the present invention, the safety fence can be easily brought into an upright state, and a quick work can be performed. Furthermore, the safety fence of the present invention is easy to manufacture because of its simple structure, and can be provided at low cost.

  Next, with reference to drawings, the safety fence for openings with a floor cover which concerns on preferable embodiment of this invention is demonstrated in detail. FIG. 1 is a perspective view showing a state in which a safety fence for an opening with a floor cover according to a preferred embodiment of the present invention stands upright. A safety cover for an opening with a floor cover, generally indicated by reference numeral 10 in FIG. 1, includes a first safety fence structure 12a, a second safety fence structure 12b, which are arranged so as to surround four sides of a rectangular opening, It has the 3rd safety fence structure 12c and the 4th safety fence structure 12d. The opposing first and second safety fence structures 12a and 12b have substantially the same structure, and the opposing third and fourth safety fence structures 12c and 12d have substantially the same structure. is doing.

  First, the 1st safety fence structure 12a is demonstrated mainly with reference to FIG. 2 and FIG. The first safety fence structure 12a includes a first support column 14, a second support column 16, a first bracket 18 fixed near the lower end of the first support column 14 on one side around the opening of the floor F, and the floor F. And a second bracket 20 fixed in the vicinity of the lower end of the second support column 16 on one side around the opening.

  The first bracket 18 has a T shape in plan view. That is, the first bracket 18 includes a rectangular plate-shaped first portion 18a and a second portion 18b disposed substantially orthogonal to the first portion 18a at the approximate center of the first portion 18a. ing. The first portion 18a is provided with a bolt hole 18a1 used when the first bracket 18 is fixed around the opening. Further, the second portion 18b is provided with a circular hole 18b1 through which a rod described later is passed.

  Similarly to the first bracket 18, the second bracket 20 also has a T shape in plan view. In other words, the second bracket 20 has a rectangular plate-shaped first portion 20a and a second portion 20b disposed so as to be substantially orthogonal to the first portion 20a at the approximate center of the first portion 20a. ing. The first portion 20a is provided with a bolt hole 20a1 used when the second bracket 20 is fixed around the opening. Further, the second portion 20b is provided with a circular hole 20b1 through which a rod described later is passed.

  The first safety fence structure 12 a is also passed through the hole 18 b 1 of the second portion 18 b of the first bracket 18 and the hole 20 b 1 of the second portion 20 b of the second bracket 20, and one end is fixed to the lower end of the first column 14. The other end is provided with a rod 22 fixed to the lower end of the second support column 16. The rod 22 has a rectangular cross section, and the hole 18b1 and the hole 20b1 through which the rod 22 is passed have a diameter slightly larger than the diagonal of the cross section of the rod 22, so that the first column 14 and The second support column 16 rotates around the longitudinal axis of the rod 22.

  The first safety fence structure 12 a further includes a torsion imparting mechanism 24 for imparting torsion to the rod 22. The torsion imparting mechanism 24 includes a series of holes 24b1 provided in an arc shape in the adjustment fitting 24a attached to the portion of the rod 22 adjacent to the second bracket 20 and the second portion 20b of the second bracket 20. , 24b2, 24b3, 24b4, 24b5. As best shown in FIG. 4, the adjustment fitting 24a includes a ring 24a1 having substantially the same size as the cross-sectional dimension of the rod 22, a tag 24a2 provided at a part of the peripheral edge of the ring 24a1, and a tag 24a2. And a hole 24a3 provided in the. Now, it is assumed that the bolt 26 is passed through the hole 24a3 and the hole 24b1, and the adjusting bracket 24a and the second portion 20b of the second bracket 20 are integrated, as shown by a one-dot chain line in FIG. Then, in the state where the first and second columns 14 and 16 are upright as shown in FIG. 3, the rod 22 is not twisted, but the first and second columns 14 and 16 are brought down. Then, since the rod 22 rotates at the position of the first bracket 18 and is fixed at the position of the second bracket 20, torsion is applied. Therefore, once the first and second support columns 14 and 16 are tilted and then released, the first and second support columns 14 and 16 can be easily moved by the force with which the rod 22 being twisted returns. Trying to stand upright.

  In addition, since the magnitude | size of the twist provided to the rod 22 is changed by passing the volt | bolt 26 in either of holes 24b2, 24b3, 24b4, 24b5 other than hole 24b1, the 1st and 2nd support | pillar 14, The restoring force when 16 is going to be in an upright state can be adjusted.

  Similar to the first safety fence structure 12a, the second safety fence structure 12b is also provided with a torsion imparting mechanism.

  Next, the third safety fence structure 12c will be described. The third safety fence structure 12c has substantially the same configuration as the first safety fence structure 12a except that the number of columns is three. More specifically, with reference mainly to FIGS. 5 and 6, the third safety fence structure 12 c is provided between the third column 30, the fourth column 32, and the third column 30 and the fourth column 32. The third support column 34 fixed near the lower end of the third support column 30 on one side around the opening of the floor F, and the fourth support column 32 on one side around the opening of the floor F. A fourth bracket 38 fixed near the lower end and a fifth bracket 40 fixed near the lower end of the fifth support 34 on one side around the opening of the floor F are provided.

  The third bracket 36 and the fourth bracket 38 have a T shape in plan view. In other words, the third bracket 36 has a rectangular plate-shaped first portion 36a and a second portion 36b disposed so as to be substantially orthogonal to the first portion 36a at the substantially center of the first portion 36a. ing. The first portion 36a is provided with a bolt hole 36a1 used when fixing the first bracket 36 around the opening. The second portion 36b is provided with a circular hole 36b1 through which a rod described later passes. The fourth bracket 38 includes a rectangular plate-shaped first portion 38a and a second portion 38b disposed so as to be substantially orthogonal to the first portion 38a at substantially the center of the first portion 38a. ing. The first portion 38a is provided with a bolt hole 38a1 that is used when the first bracket 38 is fixed around the opening. The second portion 38b is provided with a circular hole 38b1 through which the rod passes.

  The fifth bracket 40 has a π shape in plan view. That is, the fifth bracket 40 includes a rectangular plate-shaped first portion 40a, and a second portion 40b and a third portion 40c that are arranged so as to be substantially orthogonal to the first portion 40a. The first portion 40a is provided with a bolt hole 40a1 used when the fifth bracket 40 is fixed around the opening. The second portion 40b and the third portion 40c are provided with circular holes 40b1 and 40c1 for passing the rods, respectively.

  The third safety fence structure 12c also includes a hole 36b1 in the second portion 36b of the third bracket 36, a hole 38b1 in the second portion 38b of the fourth bracket 38, and a hole 40b1 in the second portion 40b of the fifth bracket 40. A rod 42 is provided that is passed through the hole 40c1 of the third portion 40c, one end is fixed to the lower end of the third support column 30, and the other end is fixed to the lower end of the fourth support column 32. The rod 42 has a rectangular cross section, and the holes 36b1, 38b1, 40b1 and 40c1 through which the rod 42 is passed have a diameter slightly larger than the diagonal of the cross section of the rod 22, thereby The third support column 30, the fourth support column 32 and the fifth support column 34 are configured to rotate around the longitudinal axis of the rod 42.

  The third safety fence structure 12c further includes a torsion imparting mechanism 44 for imparting torsion to the rod. The torsion imparting mechanism 44 includes a series of holes 44b1 provided in an arc shape in the adjustment fitting 44a attached to the portion of the rod 42 adjacent to the fifth bracket 40 and the second portion 40b of the fifth bracket 40. , 44b2, 44b3, 44b4, 44b5. The adjustment fitting 44a includes a ring 44a1 having substantially the same cross-sectional dimension as the rod 42, a tag 44a2 provided at a part of the peripheral edge of the ring 44a1, and a hole 44a3 provided in the tag 44a2. ing. Now, it is assumed that the bolt 46 is passed through the hole 44a3 and the hole 44b1, and the adjustment fitting 44a and the second portion 40b of the fifth bracket 40 are integrated. Then, in the state where the third, fourth and fifth struts 30, 32, 34 are upright, the rod 42 is not twisted, but the third, fourth and fifth struts 30, 32, When the rod 34 is tilted, the rod 42 rotates at the position of the third bracket 36 and the fourth bracket 38, while being fixed at the position of the fifth bracket 40, the twist is applied. Therefore, once the third, fourth, and fifth support columns 30, 32, and 34 are brought down and then released, the twisted rod 42 will return to its original state, similar to the first safety fence structure 12a. The third, fourth, and fifth struts 30, 32, and 34 are easily brought upright by the force to be applied.

  In both the first safety fence structure 12a and the third safety fence structure 12c, the columns are connected to each other by a horizontal member.

  Next, how the safety fence for openings with a floor lid configured as described above is used will be described. FIG. 7 is a diagram showing a series of operations related to the use of the safety fence 10 for an opening with a floor cover. Fig.7 (a) is the figure which showed the state by which the safety fence 10 for openings with a floor cover was fallen. In order to remove the floor cover, first, the third safety fence structure 12c is brought into an upright state (see FIG. 7B), and then the fourth safety fence structure 12d is brought into an upright state (FIG. 7). (See (c)), then, the first safety fence structure 12a is set upright (see FIG. 7 (d)), and finally the second safety fence structure 12b is set up (see FIG. 7 (e)). ). After that, remove the floor lid. When attaching the removed floor lid, work in the reverse order of the above procedure.

  In addition, as shown in FIG. 8, the mounting height of each safety fence structure is shifted and arranged so that each safety fence structure becomes substantially horizontal in a state where each safety fence structure 12a to 12d is tilted. Is preferred.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.

  For example, in the above-described embodiment, an adjustment fitting having a ring having substantially the same cross-sectional dimension as a rectangular rod, a tag provided at a part of the peripheral edge of the ring, and a hole provided in the tag The adjustment fitting and bracket are integrated by passing the bolt through the tag hole and the bracket hole, but when the column is tilted, the rod is twisted and twisted. The torsion imparting mechanism may have another configuration as long as the rod is intended to be easily brought upright by the force with which the rod is restored. Further, the shape of the bracket may be different from that shown in the embodiment.

It is the perspective view which showed the state which the safety fence for openings with a floor cover based on preferable embodiment of this invention stands upright. It is the perspective view which showed the state by which the 1st safety fence structure is arrange | positioned. FIG. 3 is a partially enlarged perspective view of FIG. 2. It is the expansion perspective view which showed the adjustment metal fitting of the twist provision mechanism. It is the perspective view which showed the state by which the 3rd safety fence structure is arrange | positioned. FIG. 6 is a partially enlarged perspective view of FIG. 5. It is the figure which showed a series of operation | movement regarding use of the safety fence for openings with a floor cover. It is the figure which showed typically an example of the attachment height of each safety fence structure.

Explanation of symbols

10 Safety fence for opening with floor cover 12a, 12b, 12c, 12d Safety fence structure 14, 16, 30, 32, 34 Posts 18, 20, 36, 38, 40 Bracket 22, 42 Rod 24, 44 Twist Granting mechanism

Claims (2)

A safety fence for an opening with a floor lid,
Comprising safety fence structures respectively arranged so as to surround the four sides of the opening,
Each safety fence structure is passed through a plurality of columns, a bracket fixed near each lower end of each column around the opening, and a hole provided in each bracket, and one end of the column is one end A rod fixed to the lower end of the rod, and the other end fixed to the lower end of the support column on the other end,
Each strut is adapted to rotate about the longitudinal axis of the rod,
Each safety fence structure is provided with a torsion imparting mechanism configured to impart torsion to the rod when the support column is tilted. The torsion imparting mechanism is configured such that one of the brackets and a predetermined portion of the rod are integrated with each other in an upright state of the support column, and thereby torsion is applied to the rod when the support column is tilted. The safety fence according to claim 1, wherein the safety fence is provided.

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