Fire escape – ladder – or scaffold – Safety device – platform associated – Railing
Reexamination Certificate
2002-05-23
2004-05-11
Thompson, II, Hugh B. (Department: 3634)
Fire escape, ladder, or scaffold
Safety device, platform associated
Railing
C182S179100, C182S178500
Reexamination Certificate
active
06732836
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a mounting method for a handrail in a frame scaffolding as a scaffolding device or a timbering used in building fields and engineering works fields, and more particularly to a mounting method for a handrail suitable for use with as an advance handrail.
Generally, in the building field of building and engineering works field, the frame scaffolding used as a scaffolding device or a timbering is installed.
In the frame scaffolding, a plurality of frames comprising fittings and a lateral member are stood, a scaffolding plate is erected between the lateral members adjacent to each other, one or plural sets of scaffolding frames having a handrail comprising a longitudinal strut and a lateral handrail frame erected between fittings are constituted vertically. In this case, the frame scaffolding making use of a handrail as a connecter between fittings, as disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 7 (1995)-279402, has been developed.
This handrail is constituted so that longitudinal rods on both sides, a horizontal handrail rod for connecting upper ends of both the longitudinal rods, a horizontal handrail rod for connecting an intermediaries of both the longitudinal rods, and three mounting hardwares provided at upper and lower positions of the longitudinal rod are formed integrally, and the handrail is connected as an advance handrail to the fittings through a mounting hardware.
According to the above-described conventional frame scaffolding, since the handrail is provided corresponding to the scaffolding plate between the fittings, safety is secured, but on the other hand, there are disadvantages as follows:
First, since both longitudinal rods and upper and lower handrail rods are molded integrally, the weight is heavy, and so, an operator performs detaching work while straightening his back to raise the handrail. Therefore, work for erecting the handrail between the fittings is difficult and troublesome. Sometimes, the mounting work cannot be done by a single operator, materially lowering work for mounting and removing the handrail.
Second, the handrail itself is large and bulky, which is inconvenient in carrying and storing, being placed under restriction in storing space.
Third, when, after the fittings are assembled, the integral and large handrail is mounted on the fittings, it is placed under restriction in space between the fittings so that the handrail cannot be changed in various directions, thus resulting in difficulty and troublesome to mount the handrail on the fittings.
Fourth, when the entire handrail is integrated as described above, the weight becomes heavy. So, for the purpose of making the weight as light as possible, the entirety is molded with material which is light and low in strength. Then, conversely, the entire strength becomes low, because of which the longitudinal rods are connected to the fittings making use of three upper and lower mounting hardwares. This results in complicated construction, and the detaching operation of the mounting hardwares also becomes troublesome.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a mounting method for a handrail as an advance handrail capable of simply and smoothly mounting and removing relative to a frame comprising fittings and a lateral member, and of freely performing locating without being placed under restriction in an installing space.
For achieving the aforementioned object, according to the present invention, there is provided a means, in a frame scaffolding in which a plurality of frames comprising fittings and a lateral member are stood laterally, a scaffolding plate is erected between the lateral members, a handrail is erected between the fittings adjacent to each other laterally to constitute a scaffolding frame, and a plurality of the scaffolding frames are assembled vertically, said handrail comprising a pair of longitudinal struts opposed laterally, and a lateral handrail frame erected between the struts, said strut including a first mounting member mounted on the lateral member or the fittings, a second mounting member mounted on the fittings, and a third mounting member for receiving an end of the handrail frame, the means comprising the steps of: mounting the one strut on the upper end of one fittings through the first and second mounting members on the scaffolding plate of the lower stage; mounting one end of the handrail frame on the one strut through the third mounting member on the scaffolding plate of the lower stage; mounting the other strut on the other end of the handrail frame through the third mounting member on the scaffolding plate of the lower stage; raising the other strut while rotating the other end upward about one end of the handrail frame on the scaffolding plate of the lower stage; and mounting the other strut on the upper end of the other fittings through the first and second mounting members on the scaffolding plate of the lower stage.
In this case, preferably, the first mounting member comprises a bracket having a plate bent into a roughly ]-shape secured to the strut, a holding groove formed at the lower end of the bracket and engaged with the outer surface of the fittings and a projection opposed to the holding groove, and an engaging groove likewise formed at the lower end of the bracket and fitted in the upper surface of the lateral member. Further, a stop pin for mounting a baseboard or a slot, and a stopper for controlling upward slipping out of the baseboard may be provided on the outer surface of the bracket.
Further, in the above-described means, the first mounting member may comprise a support plate connected laterally to the strut, a holding groove formed on the side of the support plate and engaged with the outer surface of the fittings, a stop plate connected to the outer end of the support plate and having an engaging groove engaged with the upper surface of the lateral member, a guide provided on the stop plate, and a wedge inserted into the guide and opposed to the engaging groove.
Likewise, the first mounting member may comprise a support rod connected laterally to the intermediary of the strut, and a hook mounted downward to the end of the support rod and fitted in a socket on the side of the fittings.
Likewise, preferably, the second mounting member comprises a plate-like bracket mounted laterally on the strut, a holding groove formed on the outer surface of the bracket and engaged with the outer surface of the fittings, a guide provided on the outer end of the bracket, and a wedge inserted into the guide and opposed to the holding groove. Likewise, the second mounting member comprises a support rod connected laterally to the lower part of the strut, and a hook provided downward on the end of the support rod and fitted in a socket on the side of the fittings.
Further, preferably, the third mounting member comprises a stop pin provided laterally on the strut and fitted in a slot formed in the end of the handrail frame.
Likewise, there is provided another means, in a frame scaffolding in which a plurality of frames comprising fittings and a lateral member are stood laterally, a scaffolding plate is erected between the lateral members, a handrail is erected between the fittings adjacent to each other laterally to constitute a scaffolding frame, and a plurality of the scaffolding frames are assembled vertically, said handrail comprising a pair of longitudinal struts opposed laterally, and a lateral main rope erected between the struts, said strut including a first mounting member mounted on the lateral member or the fittings, a second mounting member mounted on the fittings and a main rope mounting member for mounting the main rope, the means comprising the steps of: inserting the main rope into the main rope mounting portion of the upper end of the strut on the scaffolding plate of the lower stage; mounting the one strut on the upper end of one fittings through the first and second mounting members on the scaffolding plate of
McGlew and Tuttle , P.C.
Thompson II Hugh B.
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