JP6359293B2 - Parent tug stretcher - Google Patents

Description

  The present invention relates to a parent rope tensioning device.

  When working at a high place such as the rooftop of a building, a master rope is used for hooking a worker's safety belt. In addition, as a device for stretching the master rope, a parent rope tensioning metal fitting that is mounted with a roof parapet (relatively low barrier provided on the roof of the building, the edge of the terrace, etc.) is proposed. (For example, refer to Patent Document 1).

No. 6-7137

  However, the parent rope tensioning metal fitting described above sandwiches the vicinity of the upper end of the parapet, and when the tension of the parent rope is large, the bending moment acting on the root portion of the parapet becomes excessive, and the parapet may be damaged. there were. In addition, the parent leash tension fitting only sandwiches the parapet, and the parent leash tension fitting may rotate and come off.

  Therefore, an object of the present invention is to provide a parent rope tensioning device that is less likely to damage the parapet and less likely to be detached from the parapet.

In order to solve the above problems, the present invention is a master rope tensioning device for tensioning a substantially horizontal master rope on an external floor provided with a parapet on the outer periphery,
A pinching portion for pinching the parapet by an outer abutting portion that abuts on the outer surface of the parapet and an inner abutting portion that abuts on the inner surface of the parapet;
A floor contact portion that contacts the surface of the external floor;
A master rope holding section for holding the master rope.

  According to the master rope tensioning device, the reaction force against the tension of the master rope (the force by which the device tries to fall inward) can be borne on the external floor by the floor contact portion, The acting bending moment can be reduced.

  The floor abutting portion may be configured to abut on a corner formed by the parapet and the external floor. In this case, the floor abutting portion is close to the inner abutting portion and does not overhang inward so that it does not interfere with movement or work on the outer floor.

  A groove may be formed in the outer floor along the parapet, and the floor contact portion may be in contact with a rising portion of the groove. According to such a master rope tensioning device, it becomes easier to obtain a reaction force against the tension by the master rope due to the rising portion.

  The master rope holding part may be provided so as to be located near the surface of the external floor. Compared to the case where the master rope holding part is provided at a high position away from the external floor, in the master rope tensioning device configured in this way, the parent rope tensioning device rotates and comes off the parapet. Will be suppressed.

  The floor contact portion may have a predetermined width in the extending direction of the parapet, and the master rope holding portion may be provided so as to be positioned near the center of the predetermined width. In this case, even if a moment that the parent rope tensioning device tries to rotate in the plane where the parapet extends is caused by the component acting in the extension direction of the parapet among the tension of the parent rope, the floor contact The portion can be in contact with the external floor to suppress rotation.

  The gripping portion has an interval adjusting mechanism that adjusts an interval between the inner abutting portion and the outer abutting portion according to a screwing degree of the bolt, and the bolt has an axial direction with respect to an inner surface of the parapet. And having a substantially C-shaped head with a protruding end facing inward. In this case, the work of screwing the bolt can be facilitated by inserting and rotating a tool such as Shino into the substantially C-shaped head. Moreover, since the tip is opened, it is possible to prevent the parent rope from being accidentally stretched.

  According to this invention, there is little possibility that a parapet will be damaged, and there is also little possibility that it will remove | deviate from a parapet.

It is a top view which shows a mode that a pair of parent rope tensioning apparatus was provided in the parapet of the external floor, and the parent rope was tensioned using these parent rope tensioning apparatuses. It is a figure which shows the parapet seen from the II-II line in FIG. It is a figure which shows the parent rope tensioning apparatus of the state which pinched the parapet. FIG. 4 is a plan view of the master rope tensioning device shown in FIG. 3. FIG. 4 is a right side view of the master rope tensioning device shown in FIG. 3. It is a figure which shows the example of the master rope tension | tensile_strength apparatus in case the inclination of a floor contact part does not correspond with the inclination of the groove | channel of the corner of the exterior floor.

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

  1 to 6 show an embodiment of a master rope tensioning device 1 according to the present invention. The master rope tensioning device 1 is a device for tensioning a substantially horizontal master rope 50 on an external floor 100 having a parapet 200 on the outer periphery.

  The external floor 100 on which the parent rope tensioning device 1 is installed refers to an outdoor floor portion formed on, for example, a roof or a roof of a building. A parapet 200 is provided on the outer periphery of the outer floor 100 so as to cover the outer floor 100 (see FIGS. 1 and 2). The parapet 200 according to the present embodiment is formed of, for example, ALC (Autoclaved Light Weight Concrete), which has a lower strength than RC. The parapet 200 has a center side (the external floor 100 is provided). The inner side surface 204 which is a surface facing the side) and the outer side surface 202 which is the surface facing the outside are formed (see FIG. 3 and the like).

  Further, a cap 206 is formed on the top of the parapet 200. The headboard 206 is made of metal such as aluminum. In the present embodiment, the headboard 206 is formed wider than the thickness of the parapet 200 (the distance between the outer side surface 202 and the inner side surface 204) (see FIGS. 2 and 3).

  Although it can be attached to and detached from such a parapet 200, the master rope tensioning device 1 of the present embodiment includes a gripping part 2, a floor contact part 3, a master rope holding part 4, and the like.

  The pinching portion 2 is a member that holds the parent rope tensioning device 1 on the parapet 200 by holding the parapet 200 from the outside and the inside. The gripping portion 2 of the present embodiment includes an outer contact portion 22 that contacts the outer surface 202 of the parapet 200 and an inner contact portion 24 that contacts the inner surface 204 of the parapet 200 (see FIG. 3 and the like). ).

  The outer abutting portion 22 and the inner abutting portion 24 of the gripping portion 2 are provided so as to be opposed to the outer leg portion 12 and the inner leg portion 14 that are formed so as to sandwich the parapet 200 from the inside and the outside. (Refer to FIG. 3 etc.). An elastic body 22 a is provided on the surface of the outer contact portion 22. Similarly, an elastic body 24 a is provided on the surface of the inner contact portion 24.

  Further, the inner contact portion 24 is disposed in the vicinity of the lower end portion of the inner leg portion 14, and the outer contact portion 22 is disposed on the outer leg portion 12 so as to be lower than the inner leg portion 14. Therefore, according to the outer abutting portion 22 and the inner abutting portion 24, not the vicinity of the headboard 206 at the upper part of the parapet 200, but a position below it (a position near the root of the parapet 200) is pinched. This is possible (see FIG. 3).

  Note that the outer contact portion 22 and the inner contact portion 24 may be arranged at the same height. However, as described above, the outer contact portion is positioned at a position lower than the inner contact portion 24 as described above. The part 22 is arranged, and the parapet 200 is clamped in a state where both are offset (see FIG. 3 and the like). The parent rope tensioning device 1 of the present embodiment realizes the parent rope tensioning device 1 that, together with the floor contact portion 3 described later, does not damage the parapet 200 and is difficult to come off from the parapet 200. (Refer to FIG. 3 etc.).

  Further, the outer contact portion 22 protrudes inward from the outer leg portion 12, and the inner contact portion 24 protrudes outward from the inner leg portion 14. Further, the outer abutting portion 22 and the inner abutting portion 24 project inward in the horizontal direction to the extent that the amount of protrusion of the headboard 206 exceeds the horizontal direction (see FIG. 3 and the like). In this manner, the outer leg 12 and the inner leg 14 are formed in a channel shape (U-shape) in a side view, and the outer abutting portion 22 is formed near the lower ends of the outer leg 12 and the inner leg 14. According to the master rope tensioning device 1 of the present embodiment, which has a structure protruding so as to face the inner contact portion 24, a portion near the root of the parapet 200 can be pinched without interfering with the headboard 206. Yes (see FIG. 3 etc.).

  In addition, the gripping unit 2 includes an interval adjustment mechanism 26. The interval adjusting mechanism 26 is for adjusting the interval between the outer abutting portion 22 and the inner abutting portion 24 of the gripping portion 2, whereby the parent rope tensioning device 1 is attached to the parapet 200, It can be removed. In the present embodiment, an interval adjusting mechanism 26 is employed that can adjust the interval between the outer abutting portion 22 and the inner abutting portion 24 in accordance with the rotation amount of the bolt 28, and the degree of screwing of the bolt 28. Thus, the distance between the outer contact portion 22 and the inner contact portion 24 can be adjusted (see FIG. 3).

  The bolt 28 has a substantially C-shaped head portion 28a whose axial direction is orthogonal to the inner side surface 204 of the parapet 200 and whose protruding end facing the inner direction is opened (FIG. 3). FIG. 5). In this case, it is possible to prepare for the work of turning the bolt 28 in a predetermined direction and screwing it by inserting a tool or the like into the substantially C-shaped head 28a and rotating it. As described above, the substantially C-shaped head portion 28a can easily change the distance between the outer abutting portion 22 and the inner abutting portion 24. As a result, the parent rope tensioning device 1 can be attached to or detached from the parapet 200. Work becomes easier and quicker.

  In addition, if the head 28a of the bolt 28 is annular, it may happen that the head 28a is attached to the head 28a past one end of the parent rope. If it is 28a, there will be no such thing as passing over one end of the master rope. Therefore, it is possible to avoid a loss of work through the attachment position.

  The floor abutment portion 3 of the parent rope tensioning device 1 is a portion that abuts on the surface of the external floor 100. When the master rope 50 is stretched, a pulling force is applied to the master rope tensioning device 1 and a force is applied to try to tilt the parent rope tensioning device 1 inward. The drag (reaction force) at this time Can also be borne by the external floor 100 via the floor contact portion 3. For this reason, the bending moment which acts on the root part of the parapet 200 due to the tension of the master rope 50 can be reduced.

  Also, a pair of reinforcing plates 32 are provided on both sides of the floor abutting portion 3 by, for example, two substantially triangular plates (see FIG. 3 and the like). The reinforcing plate 32 functions as a reinforcing material that prevents the floor contact portion 3 from being deformed. Bolts 42 are attached to the reinforcing plate 32 of the present embodiment so as to penetrate both the reinforcing plates 32.

  An elastic body 30 that improves friction with the surface of the external floor 100 is attached to the floor contact portion 3 (see FIG. 3 and the like). For example, a plurality of V-shaped protrusions regularly arranged may be provided on the contact surface of the elastic body 30 with the outer floor 100 so as to greatly improve the friction.

  The floor abutting portion 3 has a predetermined direction in the extending direction of the parapet 200 (in the direction in which the parapet 200 is continuously formed on the rooftop of the building or the like (indicated by reference numeral A in FIGS. 1, 4, and 5)). It has a width W (see FIG. 4 etc.) The specific value of the predetermined width W here can be changed according to various conditions such as size and tension, but at least it is stretched. The width is sufficient to stably support the parent rope tensioning device 1 against the tension of the parent rope 50.

  Further, when the corner portion 150 is formed by the parapet 200 and the outer floor 100, the floor contact portion 3 may be configured to contact the corner portion 150. In this embodiment, a groove 152 having an inclination suitable for drainage is provided in the corner portion 150, whereas the floor contact portion 3 is inclined in the same manner as the groove 152 of the corner portion 150. The groove 152 is configured to be in contact with the entire surface (see FIG. 3). Such a floor abutting portion 3 is close to the inner abutting portion 24 and has a structure that does not protrude greatly inward, so that it is difficult to move or work on the outer floor 100 (FIG. 2). FIG. 3).

  In addition, the floor contact portion 3 in the master rope tensioning device 1 of the present embodiment has the tip portion 3a at the rising portion of the groove 152 (step forming portion between the bottom and the upper end of the groove 152) 152a or its vicinity. (See FIG. 3). According to such a master rope tensioning device 1, the rising portion 152a makes it easier to obtain a reaction force against the tension of the master rope 50.

  In addition, the above is only an example of the suitable form of the floor contact part 3, and another form may be sufficient as it. For example, the inclination of the floor abutment portion 3 of the parent rope tensioning device 1 may not coincide with the inclination of the groove 152 of the entrance corner 150, and as a result, the floor abutment 3 is connected to the entrance corner 150. The groove 152 may not be in full contact with the surface. However, even in that case, from the viewpoint of obtaining a sufficient resistance (reaction force) against the force to tilt the parent rope tensioning device 1 inward, the tip 3a of the floor contact portion 3 is the external floor 100. It is preferable to abut directly or via a rubber member (not shown) or the like (regardless of whether it is the rising portion 152a or its vicinity) (see FIG. 6).

  The master rope holding unit 4 is a part for holding the master rope 50. A tensioner 60 is disposed between the master rope holding unit 4 and the master rope 50 as required (see FIG. 2). As the master rope holding portion 4, for example, a carabiner attached to the master rope tensioning device 1 via bolts 42 penetrating the reinforcing plates 32 on both sides can be used (see FIGS. 2, 3 and the like) Of course, other instruments can also be used. In short, the specific configuration is not particularly limited as long as one end of the master rope 50 can be securely held.

  Such a master rope holding portion 4 is preferably provided so as to be positioned near the center in a predetermined width W in the direction A of the floor contact portion 3. In this case, due to the component acting in the extending direction of the parapet 200 in the tension of the parent rope 50, the moment to rotate the parent rope tensioning device 1 in the plane in which the parapet 200 extends is clockwise or counterclockwise. Regardless of whether it acts in the clockwise direction, the reaction force can be borne on the external floor 100 to suppress the rotation of the parent rope tensioning device 1. When a carabiner is used as the master rope holding part 4, for example, the reinforcing plate 32 is provided inside the pair of inner legs 14, and the movable range in the direction A of the carabiner is reduced, so that the position of the carabiner is predetermined. You may consider so that it may not shift | deviate from the center vicinity of the width | variety W. FIG.

  If a specific example is given and explained, when an operator actually works by putting a safety belt 54 on the hook ring 52 of the master rope 50 stretched between the pair of master rope tensioning devices 1, The pulling force acts also in the direction perpendicular to the stretched direction. As a result, the master rope tensioning device 1 is extended through the master rope 50 and the master rope holding part 4. An external force is applied to rotate in the surface to be rotated. Regardless of whether the external force acts clockwise or counterclockwise, if the master rope holding portion 4 is located near the center of the floor contact portion 3, the reaction force is borne on the external floor 100. Thus, the rotation of the parent rope tensioning device 1 can be suppressed.

  Furthermore, the master rope holding part 4 in the master rope tensioning device 1 of the present embodiment is provided so as to be positioned near the surface of the external floor 100 (see FIG. 3 and the like). When the master rope holding part 4 is provided at a high position away from the surface of the outer floor 100, the action line of the pulling force from the master rope 50 is higher than that of the outer contact part 22 and the inner contact part 24. As a result of the position, the moment to rotate the parent rope tensioning device 1 so as to fall inward increases. On the other hand, in the master rope tensioning device 1 configured as described above, it is easy to suppress such a moment and prevent the parent rope tensioning device 1 from coming off the parapet 200.

  As described above, in the parent rope tensioning apparatus 1 according to the present embodiment, the floor contact portion 3 that is a part of the parent rope tensioning apparatus 1 is placed on the surface of the external floor 100 that is a place other than the parapet 200. Therefore, the reaction force acting when tension is applied to the master rope 50 is dispersed, and not only the parapet 200 but also the external floor 100 is burdened. For this reason, the reaction force (burden) which parapet 200 itself takes can be reduced. Further, in the master rope tensioning device 1 of the present embodiment, the floor abutting portion 3 is configured to abut on the surface of the external floor 100 at a portion almost directly below the master rope holding portion 4, so that the parapet 200 In particular, the bending moment acting on the root portion (force acting in the direction of tilting the parent rope tensioning device 1 inward) can be reduced.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, a case where the rising portion (step forming portion between the bottom and the upper end of the groove 152) 152a of the groove 152 formed in the corner 150 of the external floor 100 is inclined is shown. However (see FIG. 6 and the like), this is merely an example of the external floor 100 to which the master rope tensioning device 1 according to the present invention can be applied. In addition, the rising portion 152a of the groove 152 is vertical (even if the outer floor 100 has a concave shape and the wall surface rises vertically from the end of the bottom surface of the groove 152). If the parent rope tensioning apparatus 1 can be applied as described above, the possibility of damaging the parapet 200 is reduced, and the possibility that the parent rope tensioning apparatus 1 is detached from the parapet can be reduced. Needless to say.

  INDUSTRIAL APPLICABILITY The present invention is suitable for application to a master rope tensioning device for tensioning a substantially horizontal master rope on an external floor having a parapet on the outer periphery.

DESCRIPTION OF SYMBOLS 1 ... Master rope tensioning device 2 ... Grasping part 3 ... Floor contact part 4 ... Carabiner (master rope holding part)
22 ... Outer contact part 24 ... Inner contact part 26 ... Space adjustment mechanism 28 (of the gripping part) ... Bolt 28a ... (head of bolt) 50 ... Master rope 100 ... External floor 150 ... Corner section 152 ... ( Groove 152a at the corner (in the corner) ... Raised portion 200 of the groove ... Parapet 202 ... Outside surface 204 (of the parapet) ... Inside surface of the (parapet)

Claims (5)

A master rope tensioning device for tensioning a substantially horizontal master rope on an external floor having a parapet on the outer periphery,
A pinching portion for pinching the parapet by an outer abutting portion that abuts on the outer surface of the parapet and an inner abutting portion that abuts on the inner surface of the parapet;
A floor contact portion that contacts the surface of the external floor;
A master rope holding section for holding the master rope;
Equipped with a,
The outer floor has a groove formed along the parapet,
The floor abutment, Shintsuna stretched and wherein that you contact the rising portion of the groove.   The master rope tensioning device according to claim 1, wherein the floor abutting portion is configured to abut on a corner formed by the parapet and the external floor. The master rope tensioning device according to claim 1 or 2 , wherein the master rope holding part is provided so as to be positioned near a surface of the external floor. The floor contact portion has a predetermined width in the extending direction of the parapet,
The master rope tensioning device according to any one of claims 1 to 3 , wherein the master rope holding portion is provided so as to be positioned near a center of the predetermined width. The gripping portion has an interval adjustment mechanism that adjusts an interval between the inner contact portion and the outer contact portion according to a screwing degree of the bolt,
The bolt, with its axial direction perpendicular to the inner surface of the parapet, any of claims 1 to 4 in which the projecting end facing inwardly and having a substantially C-shaped head which is open The parent rope tensioning device according to claim 1.

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