JP3709968B2 - Prop post - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a master rope support used when a master rope is stretched in a handrail shape along a steel beam in order to prevent a worker from falling from a steel frame in a building under construction. .
[0002]
[Prior art]
This kind of support for the main rope is a pillar, a clamp for fixing to a steel beam or the like provided at the lower end of the pillar, and a main rope locking or insertion provided at the upper end of the pillar In the situation where the steel beam is present independently, the master rope is located outward from the upper position of the steel beam so as not to interfere with the worker walking on the steel beam. In a situation where a floor member that can be walked by an operator, such as a plate for slab construction, is installed in an area surrounded by a steel beam, the master rope is a steel beam. It must be stretched as close to the top as possible to increase safety. Thus, this type of conventional mainline strut includes a former mainline strut for extending the mainline to a position projecting outward from the upper position of the steel beam, and the latter, the mainline strut. It was divided into the struts for the main ropes to stretch as close as possible to the position just above the steel beam.
[0003]
[Problems to be solved by the invention]
In the conventional configuration as described above, it is necessary to properly use two types of struts for the main rope depending on the situation. The economic burden was great because it was not possible.
[0004]
[Means for Solving the Problems]
An object of the present invention is to provide a strut for a master rope that can solve the conventional problems as described above, and its means is shown with reference numerals of embodiments to be described later. A body 1, a clamp 2 for fixing to a steel beam or the like provided at the lower end portion of the column body 1, and a parent rope locking or insertion fitting 7 provided at the upper end portion of the column body 1 are provided. In the master rope support, the master rope locking or insertion metal fitting 7 is arranged at a first position located substantially directly above the pillar body 1 and a second position protruding outward from directly above the pillar body 1. A parent rope support provided with a switching position switching means 8 , wherein the position switching means 8 is undulating and swinging only between the standing posture V and the outward lying posture H at the upper end of the column 1. A movable arm 12 that is freely pivoted and has the master rope locking or insertion metal fitting 7 attached to the outer end thereof, and this movable arm The over arm 12 in a standing posture V and horizontal position H has a configuration consisting of fastener 13 for alternatively locking.
[0006]
In carrying out the above-described strut for the master rope according to the present invention, the locking device 13 includes a pin 16 disposed in the movable arm 12 and biased outward by a spring 15. When the pin 16 is provided with a pin support through-hole 17 that is fitted and supported so as to be freely retractable, and the movable arm 12 is in the standing posture V and the lying posture H at the upper end portion of the column 1, Pin locking through holes 18 and 19 into which the pins 16 protruding from the movable arm 12 by the urging force of the spring 15 are fitted can be provided. In this case, the spring 15 is a U-shaped plate spring that is loosely fitted in the movable arm 12, and the pins 16 are attached outwardly to both ends of the plate spring 15, and the pin supporting through hole 17 on the movable arm 12 side. In addition, a pair of left and right pin locking through holes 18 and 19 on the column body 1 side can be provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, 1 is a column made of a square pipe material, and 2 is provided at the lower end of the column 1. It is a clamp for fixing to steel beams. The clamp 2 is fixed to the left and right sides of the lower end of the column 1 and has a pair of left and right U-shaped side plates 3 whose upper and lower ends protrude forward, and an upper protruding portion of the pair of left and right U-shaped side plates 3. A horizontal plate 4 fixedly installed in an area surrounded by the column 1 and a pair of left and right clamping screws 5 that threadably penetrate the horizontal plate 4 in parallel with the column 1, The edge portion of the steel beam can be sandwiched and fixed between the clamping screw 5 and the upper edge 3a of the lower protruding portion of the pair of left and right U-shaped side plates 3. Reference numeral 6 denotes a lower cover plate that also serves as a reinforcing plate and is obliquely fixed between the pair of left and right U-shaped side plates 3 so as to close the lower end of the column 1.
[0008]
Reference numeral 7 denotes a parent rope locking or insertion fitting, which is attached to the upper end portion of the column 1 via the positioning means 8. An upper cover plate 9 is fixed to the upper end of the column 1, and a gate-shaped bearing member 10 is mounted on the upper cover plate 9 with bolts 11 at mounting portions that project from the lower end to the left and right sides. . The positioning means 8 is composed of a movable arm 12 made of grooved steel with a lip and having the metal fitting 7 fixed to the tip thereof, and a locking tool 13, and the movable arm 12 is made up of the portal bearing member 10. As shown in FIG. 1B, an upright posture V is supported between the side plate portions 10a and 10b by the horizontal support shaft 14 and contacts the rear end 10d of the top plate portion 10c of the portal bearing member 10 as shown in FIG. 1A. As described above, the gate-shaped bearing member 10 is configured so as to be able to swing up and down only between the tilted posture H contacting the lower side of the top plate portion 10c.
[0009]
As shown in FIGS. 3 to 5, the locking device 13 includes a U-shaped plate spring 15 that is loosely fitted in the movable arm 12, and a pair of pins 16 that are attached outwardly to both ends of the plate spring 14. The movable arm 12 is provided with a pair of pin support through-holes 17 into which the pair of pins 16 are removably fitted and supported, and both side plate portions 10a and 10b of the bearing member 10 are provided on both side plates 10a and 10b. When the movable arm 12 is in the upright position V, the pair of pin locking through holes 18 into which the pair of pins 16 protruding from the movable arm 12 are fitted by the urging force of the leaf spring 15 and the movable arm 12 are inclined. A pair of pin locking through holes 19 into which the pair of pins 16 protruding from the movable arm 12 by the urging force of the plate spring 15 when in the posture H are provided.
[0010]
The master rope locking or insertion metal fitting 7 is formed by bending a single steel bar into a horizontally long oval, and a ring portion 7a for locking the end of the master rope or inserting the master rope. The steel bars are composed of bent legs 7b, 7c which are formed by bending downwardly overlapping ends of the steel bar and are fixed to the left and right side surfaces of the movable arm 12 by welding or the like. Of course, it is not limited to. In FIGS. 1 and 2, reference numeral 20 denotes a handle that is fixedly provided on the front surface of the column 1.
[0011]
The struts for the master rope having the above-mentioned structure are erected so that the pillars 1 are perpendicular to both ends and intermediate intermediate positions of the master rope tension section by sandwiching and fixing the outer edge portion of the steel beam with the respective clamps 2. Is done. And the master rope support | pillar located in the both ends of the master rope tension | tensile_strength section in the state which made the master rope penetrate the metal fitting 7 (ring part 7a) of the upper end of the master rope support pillar located in the middle of the master rope tension construction section By locking the end of the master rope to the metal fitting 7 (ring part 7a) at the upper end of the master rope, the master rope is stretched between the struts for the master rope positioned at both ends of the master rope tensioning section with an appropriate tension. . The worker can prevent the fall of the worker by engaging the free end carabiner of the safety belt with the master rope.
[0012]
As described above, the main strut struts are used. However, if there is no slab construction plate installed on the inside of the steel beam and the steel beam is present independently, the brackets for each main strut strut 7, the movable arm 12 is switched to the lying posture H shown in FIG. 1B, arranged at the second position projecting outward from directly above the steel beam, and the master rope stretched using the metal fitting 7 Is shifted outward from the position directly above the steel beam. When a member that becomes a floor on which an operator can walk, such as a slab building plate, is installed in an area surrounded by steel beams, the metal brace 7 of each parent rope is attached to the movable arm. 12 is switched to the standing posture V shown in FIG. 1A, and is placed at the first position directly above the steel beam, and the master rope to be stretched using this metal fitting 7 is positioned almost directly above the steel beam. Can do.
[0013]
The position switching between the first position and the second position of the metal brace 7 (movable arm 12) of each master rope is performed by, for example, pressing the pair of pins 16 of the locking tool 13 with the thumb of one hand and the index finger or the middle finger. The pin 10 is pushed inward against the urging force of the plate spring 15 from the outside of the pin locking through hole 18 or the pin locking through hole 19 of the left and right side plate portions 10a and 10b of the bearing member 10, and these pins are locked. In a state in which the movable arm 15 is detached from the through hole 18 or the pin locking through hole 19 (fitted to the pin supporting through hole 17 on the movable arm 12 side), the movable arm 15 is attached to the horizontal support shaft 14. Rotate around. As a result, when the movable arm 15 reaches the lying posture H that contacts the lower surface of the top plate portion 10c of the bearing member 10 from the standing posture V, or the rear end of the top plate portion 10c of the bearing member 10 from the lying posture H. When the standing posture V that contacts 10d is reached, the pair of pins 16 are automatically fitted into the pin locking through hole 19 or the pin locking through hole 18 on the bearing member 10 side by the biasing force of the leaf spring 15. Then, the movable arm 12 and the bearing member 10 are coupled via the pin 16, and the movable arm 12 is fixed to the lying posture H (the metal fitting 7 is in the second position) or the standing posture V (the metal fitting 7 is in the first position). The
[0014]
In addition, the position switching means 8 for switching the master rope locking or insertion metal fitting 7 between a first position located substantially directly above the column body 1 and a second position protruding outward from directly above the column body 1. Or the structure of the said locking tool 13 in the case of comprising this position switching means 8 with the movable arm 12 and the locking tool 13 is not limited to the thing of the said embodiment. Further, the master rope locking or insertion metal fitting 7 is not limited to the above embodiment.
[0015]
【The invention's effect】
As described above, according to the master rope support of the present invention, in the situation where the steel beam is present independently, the master rope locking or insertion fitting protrudes outward from directly above the pillar body by the position switching means. Switch to the second position and place the master rope that is stretched using the metal fittings in a position that protrudes outward from the upper position of the steel beam so as not to disturb the worker walking on the steel beam. On the contrary, in the situation where a member that becomes a floor on which workers can walk, such as a slab construction plate, is installed in the area surrounded by steel beams, it is used for locking or insertion of the master rope by the position switching means Switch the bracket to the second position, which is located almost directly above the column, and improve the safety by laying the master rope to be stretched using the bracket as close as possible to the steel beam. be able to.
[0016]
That is, according to the present invention, as in the prior art, the strut for the master rope for extending the master rope to a position protruding outward from the upper position of the steel beam, and the master rope just above the steel beam. It is no longer necessary to prepare two types of struts for parent ropes to be stretched as close as possible, and one kind of strut for struts can be switched and used to correspond to two situations. This not only eliminates the need to replace the strut for the master rope, but also greatly reduces the economic burden. Moreover, according to the configuration of the present invention, the position switching means of the master rope locking or insertion metal fitting can be simplified.
[0017]
In addition, according to the structure of Claim 2, operation required at the time of the master rope locking or the position switching of the metal fitting for insertion becomes easy, Furthermore, according to the structure of Claim 3 , the master rope locking Alternatively, the insertion fitting can be positioned stably with a pair of left and right pins.
[Brief description of the drawings]
FIG. 1A is a partially longitudinal side view when a master rope locking or insertion metal fitting is in a first position (movable arm is in a standing posture), and FIG. It is a partial vertical side view of the principal part when a metal fitting exists in a 2nd position (a movable arm is a lying posture).
FIG. 2 is a front view of FIG. 1A.
FIG. 3 is an enlarged longitudinal sectional front view of the main part of FIG. 1A.
4 is a transverse plan view of FIG. 3. FIG.
5 is a longitudinal side view of FIG. 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylinder 2 Fixing clamp 7 to a steel beam 7 Parent rope locking or insertion metal fitting 8 Position switching means 12 Movable arm 13 Locking tool 14 Horizontal support shaft 15 U-shaped plate spring 16 Pin 17 Movable arm side pin Supporting through holes 18, 19 Pin locking through holes on the column side

Claims (3)

A strut for a master rope provided with a pillar, a clamp for fixing to a steel beam or the like provided at the lower end of the pillar, and a master rope locking or insertion fitting provided at the upper end of the pillar A position switching means for switching the master rope locking or insertion metal fitting between a first position located substantially directly above the column body and a second position projecting outward from directly above the column body is provided. The position switching means is pivotally supported at the upper end of the column body so that it can swing up and down only between the standing posture and the outward lying posture, and the parent rope is supported at the outer end. A support for a main rope, comprising : a movable arm to which a locking or insertion metal fitting is attached; and a locking tool for selectively locking the movable arm between a standing posture and a lying posture . The locking tool includes a pin disposed in the movable arm and biased outward by a spring, and the movable arm has a pin support through-hole through which the pin is fitted and supported so as to be retractable. Provided at the upper end of the column body are pin locking through-holes for fitting the pins protruding from the movable arm by the biasing force of the spring when the movable arm is in the standing posture and the lying posture. The strut for a master rope according to claim 1, wherein The spring is a U-shaped plate spring loosely fitted in a movable arm, and the pins are attached outwardly to both ends of the U-shaped plate spring, and the pin supporting through-hole on the movable arm side and 3. The strut for master rope according to claim 2, wherein a pair of left and right through holes for pin locking on the column body side are provided.

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