JP2008223366A - Main rope guide device and main rope guiding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a main rope guide device which guides or moors a main rope for preventing a hindrance at the time of mounting a steel slab for a structure floor, during construction of a steel structure, and to provide a main rope guiding method. <P>SOLUTION: The safety rope guide device (1) has a main rope guide section (10) for guiding the main rope (50), a support portion (2) for supporting the safety rope guide portion, and an engaging section (20) for engaging the support portion with a steel horizontal member. The engaging section is arranged on an upper edge of the support portion, and is engaged with an upper-story steel horizontal member (B2). The support portion is suspended from the engaging section. The safety rope guide section is arranged on a lower edge of the support portion, and suspended from the upper-story steel horizontal member by the support portion and the engaging section. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a master rope guide device and a master rope guide method, and more specifically, a master rope guide device attached to a steel structure in order to ensure the safety of work at high places, and the master rope guide device. It relates to the parent rope guide method used.

  As a safety measure for working at heights at construction sites, etc., it is stretched or erected on the waist or chest level of construction workers, construction supervisors, design supervisors, etc. (hereinafter simply referred to as “site workers”). Is known (Japanese Patent Laid-Open No. 2006-336267, etc.). The master rope is used in many construction sites in order to ensure the safety of work at a high place in a temporary scaffold before the installation of a handrail and to ensure the safety of work at a high place during the construction of a steel frame.

  When the master rope is stretched or erected on the temporary scaffold, usually, a plurality of master rope struts capable of mooring the master rope are arranged at intervals along the work floor or work passage of the temporary scaffold. The master rope moored to the master rope support is tensioned by a tensioner or tension means, and is stretched or erected substantially horizontally along the work floor or work passage. Site workers, etc. moor or lock the life rope part of the safety belt (waist belt) worn on the waist to ensure work safety and avoid the danger of falling.

The same master rope support is also used when the master rope is stretched or installed on a steel frame of a steel structure. A master rope supporter attached to a steel frame has a locking portion that can be locked to a steel beam or the like at a lower end portion, and a parent rope guide portion for mooring the parent rope at an upper end portion (JP-A-11-30043). Publication, Unexamined-Japanese-Patent No. 2003-325688, etc.). The locking portion is firmly attached to the flange portion of the steel beam, and the master rope column extends substantially vertically upward from the steel beam. The master rope is moored or locked to the master rope mooring portion, is tensioned as desired, and is stretched or constructed along the steel beam. Field workers and the like can move relatively safely on the steel beam with the rope portion of the safety belt moored to the master rope.
JP 2006-336267 A, etc. Japanese Patent Laid-Open No. 11-30043 JP 2003-325688 A

  A horizontal member such as a steel beam in a steel structure building is lifted by a lifting machine such as a crane when constructing the steel frame, and is connected to a column head or the like of a column at a preset position. The master rope struts are arranged at a predetermined interval on the horizontal member, and the master rope is stretched or installed on the upper side of the horizontal member.

  On the other hand, in the construction of steel structures, steel plates (steel plates) for structural floors such as deck plates and keystone plates are constructed after the completion of steel frame construction, and each work such as reinforcement for floor slabs and concrete placement Performed on steel plate for structural floor.

  Since the construction of the steel plate for the structural floor is difficult to carry out in a state where the master rope column is erected on the horizontal member, the master rope column and the master rope are removed when the steel plate for the structural floor is constructed. After the structural floor steel plate is installed on the floors of all construction sections, the structural floor steel plate itself provides a safe working floor and working environment. The situation in which the area and the unconstructed area are mixed continues for a relatively long time. For this reason, it is not desirable to remove the master rope at an early stage for the construction of the steel sheet for the structural floor from the viewpoint of ensuring the safety of the work.

  The present inventors intend to re-install the master rope column on the steel plate for structural floor after removing the master rope column from the horizontal member, so that the master rope can be bolted to the steel plate for structural floor. We made a prototype of the column and examined its practicality. However, when attaching the master rope support to the steel plate for the structural floor, for drilling the bolt holes in the steel plate for the structural floor, filling the bolt holes after use, fixing the bolts of the master rope and the bolt dismantling work, etc. A great deal of labor and labor is additionally imposed on site workers and the like. For this reason, it turned out that the method of attaching the master rope support to the steel plate for the structural floor is difficult to actually adopt.

  Thus, in the construction of steel structures, there is a demand for the development of a master rope guide device and a master rope guide method that can keep the master rope moored or locked so as not to hinder the construction of the steel plate for the structural floor. It was.

  The present invention has been made in view of such circumstances, and an object of the present invention is to be able to guide or moor the master rope so as not to hinder the construction of the steel plate for structural floor. To provide a master rope guide device and a master rope guide method for constructing a structure.

In order to achieve the above object, the present invention includes a master rope guide portion that guides the master rope, a column portion that supports the master rope guide portion, and a locking portion that locks the column portion to the steel frame horizontal member. In the master rope guide device,
The locking portion is disposed at the upper end of the support column, and is locked to the upper horizontal steel frame member.
The column portion hangs down from the locking portion,
The master rope guide unit is arranged at a lower end portion of the support column part, and is provided to be suspended from a steel frame horizontal member on an upper floor by the support column part and a locking part.

  According to the said structure of this invention, a latching | locking part is attached to the steel frame horizontal member of an upper floor, and the master rope guide part is suspended by the steel frame horizontal member of an upper floor. In normal steel structure buildings, the horizontal position of the steel horizontal members on the upper and lower floors is almost the same. Therefore, by hanging the master rope guide part from the steel horizontal members on the upper floor, A master rope can be stretched or erected on the upper side. Thus, according to the present invention, the master rope guide device is not disposed at the construction level of the structural floor steel plate, and therefore the structural floor steel plate can be constructed without interfering with the master rope guide device. Moreover, the site workers and the like can use the master rope until the construction of the steel plates for structural floors in all construction sections is completed.

From another aspect, the present invention provides a master rope guide method for guiding a master rope by the master rope guide device having the above-described configuration.
In the state where the locking portion is locked to the steel frame horizontal member, the horizontal member is raised to the building position,
A master rope guide method is provided, wherein the master rope is guided by the master rope guide section suspended from the horizontal member.

  According to the master rope guide method of the present invention, after the master rope guide device is attached to the steel frame horizontal member at the ground level or the lower floor level, the steel frame horizontal member is built, so that the master rope guide is simultaneously provided with the steel frame construction method. The device can be attached to a steel frame on the upper floor.

  Preferably, the column portion is pivotally connected to the locking portion. By connecting the column portion to the locking portion so as to be rotatable, the column portion can be attached to the steel frame horizontal member on the ground or the lower floor before the steel frame horizontal member is lifted or built. The column portion pivots downward so as to hang down from the steel frame horizontal member when the steel frame horizontal member is raised.

  According to the master rope guide apparatus of the present invention, the master rope can be guided or moored so as not to hinder the construction of the steel plate for structural floor.

  Further, according to the master rope guide method of the present invention, the master rope guide device can be attached to the steel frame horizontal member simultaneously with the steel frame construction in the construction of the steel structure.

  According to a preferred embodiment of the present invention, the column portion is connected to the locking portion so as to rotate around a horizontal axis extending in the width direction of the steel horizontal member, and in the length direction of the horizontal member. Rotation of the column portion about the extending horizontal axis is suppressed or restricted.

  Preferably, the locking portion includes a clamp mechanism that clamps or bites a horizontal flange portion of the steel frame horizontal member on the upper floor, and the column portion includes a length adjusting means for adjusting the overall length of the parent rope guide device. Have. More preferably, the master rope guide part has an annular guide member. The guide member is oriented so as to pass through the master rope in a direction parallel to the length direction of the horizontal member. As the guide member, a carabiner having an opening / closing portion for receiving the parent rope in the ring can be suitably used.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a front view and a partially enlarged front view showing the configuration of the master rope guide device according to the present invention. 2 is a side view and a partially enlarged side view of the master rope guide device shown in FIG.

  The master rope guide device 1 includes a master rope guide tool 10 that guides the master rope, a straight strut portion 2 that supports the master rope guide tool 10, and a locking tool 20 that locks the strut portion 2 to the steel frame horizontal member. And have. The column portion 2 includes a telescopic double tube structure including an inner tube 3 and an outer tube 4 having a circular cross section. The inner tube 3 is inserted into the outer tube 4 so as to be relatively displaceable, and the set pin 5 penetrates the outer tube 4 and the inner tube 3 in the diametrical direction. The set pin 5 is moored to the column part 2 by a metal chain 6. As shown in FIG. 2, a plurality of set holes 7 and 8 into which the set pins 5 can be inserted are formed in the tube walls of the outer tube 4 and the inner tube 3, respectively.

  The state where the overall length of the master rope guide device 1 is shortened the most is shown in FIGS. 1 (A) and 2 (A). The set pin 5 passes through the set holes 7 and 8 of the outer tube 4 and the inner tube 3, and the length of the master rope guide device 1 is set to the minimum dimension.

  By pulling out the set pin 5 from the set holes 7 and 8 and pulling out the inner tube 3 from the outer tube 4, the parent rope guide device 1 can be extended. The state where the master rope guide device 1 is extended to the maximum length is shown in FIGS. 1 (D) and 2 (D). The total length of the master rope guide device 1 is adjusted in stages by selecting the setting holes 7 and 8. By inserting the set pin 5 into the appropriate set holes 7 and 8, the total length of the parent rope guide device 1 can be set to a desired dimension within the range from the maximum length to the minimum length.

  The master rope guide tool 10 is attached to the lower end portion of the inner tube 3, and the locking tool 20 is attached to the top portion of the outer tube 4. The master rope guide tool 10 has a carabiner-type guide portion 14 into which the master rope 50 can be inserted, and the lock tool 20 has a clamp mechanism 24 that can be locked to a steel beam of a building.

  The master rope guide tool 10 includes a connecting portion 12 fixed to the lower end portion of the inner pipe 3 by a bolt / nut assembly 11, a bolt / nut assembly 13 passing through the connecting portion 12, and a bolt / nut assembly 13. And a carabiner type guide portion 14 fixed to the connecting portion 12. The guide portion 14 is made of an annular metal carabiner provided with an opening / closing member 15. The reduced diameter upper portion of the guide portion 14 is disposed between the bolt and nut assemblies 11 and 13, and the guide portion 14 is supported around the horizontal central axis R <b> 1 of the bolt and nut assembly 13. The central axis R1 is oriented in a direction parallel to the central line of the steel beam (H-shaped steel). The connecting part 12 only holds the guide part 14, and the guide part 14 can be replaced relatively easily. The diameter-expanded lower portion of the guide portion 14 receives the master rope 50 from the opening / closing portion 15 into the ring. The master rope 50 is held in the ring of the guide part 14 unless the site worker or the like operates the opening / closing part 15.

  The locking tool 20 is connected to the connecting part 22 by a bolt / nut assembly 21 penetrating the upper end of the outer tube 4, a connecting part 22 pivotally supported by the bolt / nut assembly 21, and a fixing bolt 23. The clamp mechanism 24 is fixed. The clamp mechanism 24 has upper and lower horizontal portions 26 and 29, and forms an open space 25 that can receive a horizontal flange portion F of a structural steel material (in this example, a horizontal flange portion of an H-shaped steel). The horizontal flange portion F is inserted into the opening space 25 as indicated by phantom lines in FIGS. 1 (B) and 2 (B).

  The clamp mechanism 24 has a fastening bolt 28 screwed into a screw hole (not shown) of the upper horizontal portion 29, and a movable surface material 27 is attached to the lower end of the bolt 28. The movable surface member 27 and the lower horizontal portion 26 clamp the horizontal flange portion F by the tightening force of the bolt 28, and the locking tool 20 is fixed to the horizontal flange portion F.

  The center axis R2 of the bolt / nut assembly 21 is oriented in a direction perpendicular to the center line of the steel beam (H-shaped steel) (that is, the width direction of the steel beam). The column part 2 and the locking tool 20 rotate relative to each other around the central axis R2.

  3-5 is the front view and side view which show the attachment process of the master rope guide apparatus 1 with respect to the steel beam (H-shaped steel) of a steel structure building.

  FIG. 3 shows a steel beam (H-shaped steel) B1 on the lower floor side that has already been constructed. In a state or stage before construction of the steel plate D for the structural floor, the upper level steel beam (H-shaped steel) B2 is transiently arranged at the lower level (upper side of the steel beam B1). The steel beam B1 and the steel beam B2 are spaced apart so as not to hinder the work of attaching the locking tool 20 of the parent rope guide device 1 to the lower flange F of the steel beam B2. It is attached to the flange F. As shown in FIG. 3 (B), the master rope guide device 1 is attached to the steel beam B2 in a state where the column part 2 is rotated upward, and the column part 2 extends substantially parallel to the steel beam B2.

  As shown in phantom lines in FIG. 3, a steel plate (deck plate) D for structural floor is constructed on the steel beam B1. As shown in FIGS. 4 and 5, the steel beam B <b> 2 is lifted to the upper frame level by a lifting machine such as a crane. As the steel beam B2 rises, the column portion 2 rotates downward about the central axis R2 as shown in FIG. As shown in FIG. 5, when the steel beam B2 is raised to a desired construction position, the locking tool 20 and the column part 2 are vertically aligned under gravity, and the column part 2 is a lower flange F of the steel beam B2. Droop from.

  FIG. 6 shows a state in which a plurality of master rope guide devices 1 are attached to a steel beam B2 on the upper floor according to the procedure shown in FIGS.

  A steel beam B3 around the outer wall of the building is shown in FIG. A hook 61 provided at the end of the master rope 50 is moored to a temporary holder 62 attached to a steel column C (partially shown). The master rope 60 extends along the steel beams B <b> 1 and B <b> 2 and is guided by the guide tool 10 of the master rope guide device 1. The guide 10 receives the master rope 50 in the ring of the guide part 14 by operating the opening / closing part 15. As a modified example, a master rope support having a conventional structure may be attached to the steel beam B3 around the outer wall, and the end of the master rope 50 may be moored and bound or restrained with respect to the master rope support.

  Field workers or the like moor the life rope portion 71 of the safety belt 70 worn on the waist to the master rope 50 by the hook 72. Field workers and the like can move on the steel beam B1 relatively safely.

  When such an operator or the like moves, swinging or pivoting in the direction indicated by the arrow α in FIG. 6B can occur in the column part 2, and the behavior of the column part 2 in this direction is the same as that of the steel beam B 1. Since the behavior is in the same direction, it does not substantially affect the safety of field workers.

  On the other hand, since the rotation center axis (center axis R2) of the locking tool 20 is oriented in the width direction of the steel beams B1 and B2, the swing of the column portion 2 in the arrow β direction shown in FIG. Movement or pivoting is suppressed or restricted. Therefore, the behavior of the column portion 2 that causes the field worker or the like to tilt in the width direction of the steel beams B1 and B2 hardly occurs.

  FIG. 7 shows a usage example of the master rope guide device 1 in a steel structure building in which the floor height dimension H and the beam dimension h are set to relatively large values.

  The master rope guide device 1 can be extended in length as shown in FIGS. 1 (D) and 2 (D). The building shown in FIG. 7 has a larger floor height dimension H than the building shown in FIG. The steel beam beams B1 and B2 of the building shown in FIG. 7 have a larger beam h dimension than the steel beam of the building shown in FIG.

  The state in which the master rope guide device 1 is extended to the maximum length is shown in FIGS. 1 (D) and 2 (D). The total length of the master rope guide device 1 can be set to an optimum length adapted to the floor height dimension H and the beam tread dimension h by selective use of the set holes 7 and 8. Therefore, the master rope guide device 1 is adapted to any building having a different floor height dimension H and / or beam dimension h as shown in FIG.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications or changes can be made within the scope of the present invention described in the claims. Is possible.

  For example, in the above-described embodiment, the master rope guide device 1 includes the strut portion 2 having a telescopic double tube structure that can be adjusted in length. A length adjusting mechanism having another configuration such as an expansion joint may be adopted, or the length may be adjusted by replacing the support itself.

  Moreover, in the said Example, the master rope guide apparatus 1 is the structure which connected the support | pillar part 2 to the latching tool 20 so that rotation was possible by supporting the connection part 22 with the volt | bolt and nut assembly 21 so that rotation was possible. However, you may connect the support | pillar part 2 to the latching tool 20 through the rotation means or pivoting means of other structures, such as a pivot joint and a ball joint.

  Further, in the above embodiment, the master rope guide device 1 is provided with the master rope guide tool 10 having the carabiner type guide portion 14, but the master rope guide of other structures such as a roller type guide tool and an annular guide tool. Means may be employed.

  In the above embodiment, the column portion 2 is constituted by the inner tube 3 and the outer tube 4 having a circular cross section. However, the column portion 2 is constituted by a tube body or a tubular member having another sectional shape such as a square cross section. May be.

  The present invention is preferably applied to a master rope guide device and a master rope guide method for guiding or mooring a master rope in the construction process of a steel structure. If desired, the present invention is applied to a master rope guide device and a master rope guide method for a temporary structure such as a framework scaffold, or the present invention is applied to a building having another structure such as an SRC structure or an RC structure. It is also possible to do.

It is the front view and partial enlarged front view which show the structure of the master rope guide apparatus which concerns on this invention. It is the side view and partial expanded side view of the master rope guide apparatus shown in FIG. It is the front view and side view which show the attachment process of the master rope guide apparatus with respect to the steel beam (H-shaped steel) of a steel structure building, and the process of attaching a master rope guide apparatus to a steel beam beforehand in the lower floor level is shown. . It is the front view and side view which show the attachment process of the master rope guide apparatus with respect to the steel beam (H-shaped steel) of a steel structure building, The process of raising a master rope guide apparatus is shown. It is the front view and side view which show the attachment process of the master rope guide apparatus with respect to the steel beam (H-shaped steel) of a steel structure building, The state which raised the locking tool of the master rope guide apparatus to the upper floor level is shown ing. It is the front view and side view which show the state which attached the some master rope guide apparatus to the steel beam of the upper floor according to the construction procedure shown in FIGS. It is the front view and side view which show the usage example of the master rope guide apparatus in the steel structure building which set the floor height dimension and the beam dimension to the comparatively big value.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Master rope guide apparatus 2 Support | pillar part 3 Inner pipe 4 Outer pipe 5 Set pin 6 Metal chain 7, 8 Set hole 10 Parent rope guide tool 11, 13, 21 Bolt and nut assembly 12 Connection part 14 Carabiner type guide part 15 Opening and closing Part 20 Locking tool 22 Connecting part 23 Fixing bolt 24 Clamp mechanism 50 Master rope R1, R2 Center axis B1, B2 Steel beam (horizontal material)
D Steel plate for structural floor (deck plate)
F Flange

Claims (8)

In the master rope guide device having a master rope guide part that guides the master rope, a column part that supports the master rope guide part, and a locking part that locks the pillar part to the steel frame horizontal member,
The locking portion is disposed at the upper end of the support column, and is locked to the upper horizontal steel frame member.
The column portion hangs down from the locking portion,
The master rope guide device is arranged at a lower end portion of the column portion, and is suspended from a steel frame horizontal member on an upper floor by the column portion and the locking portion.   The master strut guide device according to claim 1, wherein the column portion is rotatably connected to the locking portion.   The column portion is connected to the locking portion so as to rotate about a horizontal axis extending in the width direction of the horizontal member, and the column about the horizontal axis extending in the length direction of the horizontal member The parent rope guide device according to claim 2, wherein the rotation of the portion is suppressed or restricted.   The master rope guide device according to any one of claims 1 to 3, further comprising a length adjusting means for adjusting a length of the column portion.   The master rope guide device according to any one of claims 1 to 4, wherein the master rope guide section includes an annular guide member.   The master rope guide device according to any one of claims 1 to 5, wherein the locking portion includes a clamp mechanism that clamps or bites a horizontal flange portion of the horizontal member. In the master rope guide method of guiding the master rope by the master rope guide device according to any one of claims 1 to 6,
Raising the horizontal member to the erected position with the locking part locked to the steel horizontal member,
The master rope guide method characterized by guiding the master rope by the master rope guide part suspended from the horizontal member. The master rope guide method according to claim 7, wherein the locking portion is locked to the horizontal member at a floor level or a ground level of a floor on which a steel plate for structural floor is to be constructed.

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