JP2004016391A - Main rope holder which can pass safety rope hook - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive reliable means which can pass a safety rope as a holder to hold the main rope between both ends while the safety rope is joined with the main rope. <P>SOLUTION: Holding frames 18, 20 to hold the main rope 10 are closely and horizontally set. One holding frame 18 has a notch 18a downward and the other holding frame 20 a notch 20a upward. A main rope connecting metal 22 tied with main ropes 10 is passed insides of both holding frames, and flanges 22c, 22d on both ends restrict sliding of the main ropes 10. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a main rope support device through which a lifeline hook can pass, and more particularly to a main rope support device having a cutout in a support frame holding the main rope.
[0002]
[Prior art]
Generally, when performing high-altitude work, a worker connects one end of a lifeline (safety rope) to the body of the worker, and connects the other end to a stable building or master rope to ensure safety. In this case, the operator has to change the connection destination of the lifeline every time he moves to the work place.
[0003]
Means for solving this problem in high-altitude work at the time of elevator inspection is described in JP-A-8-99782. In this related art, the attachment destination of the hook at the tip of the lifeline is not a fixed point but a handrail-shaped metal fitting, thereby expanding the movable range of the worker.
[0004]
Further, Japanese Patent Application Laid-Open No. 7-224540 discloses a means for solving the problem by using a main line supporting bracket with a swinging piece shown in FIG. 8 when a lifeline hook is attached to a main line. I have. That is, the master rope 40 having both ends fixed is supported by the master rope support fitting 42 provided therebetween. A notch 44 is provided in the master support bracket 42, but rocking pieces 46a, 46b, 46c are provided in the cuts to prevent the master rope 40 from coming off. A lifeline 48 is connected to the parent line 40 by using an annular hook 50 at the tip thereof. Since the hook 50 can pass through the notch 44 beyond the swinging pieces 46a, 46b, 46c, the worker wearing the lifeline 48 can move beyond the parent line support fitting 42 without removing the hook 50. it can.
[0005]
[Problems to be solved by the invention]
However, the safety device described in Japanese Patent Application Laid-Open No. 8-99782 has a problem that the hook can move only a relatively short distance due to the restriction of the length of the handrail-shaped bracket.
[0006]
In addition, the invention shown in FIG. 8 has an advantage that the parent rope 40 is supported by the parent rope support fitting 42, so that it can cope with a long distance. However, since the mechanical rocking pieces 46a, 46b, and 46c are included, manufacturing There were a problem that the cost was high and a problem that required maintenance and inspection.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a master rope supporting device according to a first aspect of the present invention is a master rope supporting device for supporting a main rope to which an annular hook at the tip of a life rope is coupled between both ends thereof. It has two support frames which are arranged adjacent to each other at a slightly wide interval and hold the parent rope inside, and both support frames are provided with notches at different positions on the support frame so as to be able to pass through hooks. It is characterized by the following.
[0008]
According to a second aspect of the present invention, in addition to the features of the main rope supporting device of the first invention, the main rope is provided with a flange that cannot pass through the support frame.
[0009]
Further, a third invention is characterized in that the master rope support device of the first or second invention is attached to a roof portion of an elevator car.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the drawings, the same members are denoted by the same reference numerals, and description thereof is omitted.
[0011]
FIG. 1 is a perspective view showing the configuration of the main rope supporting device, and FIG. 2 is a top view of FIG. First, the master rope 10 is stretched horizontally and is out of the range of the drawing, but both ends are fixed at stable positions using carabiners. The main rope supporting device of the present invention has a role of supporting the main rope between both ends of the fixed main rope 10. Therefore, it must be firmly installed, and in the example shown in the figure, it is fixed to the stable column 12 using the fixing brackets 14 and 14a and the screw 14b. A support arm 16 is welded to the fixing bracket 14, and two support frames 18 and 20 are horizontally welded to the support arm 16 with a distance G therebetween. The upper and lower surfaces of the support frames 18 and 20 are made of metal having a plate-like shape and the side surfaces thereof are made of a thick metal, and hold the master rope 10 which is passed to the internal space. Further, a notch 18a is provided on the lower surface of the support frame 18, and a notch 20a is provided on the upper surface of the other support frame 20, as described later, as a passage for a hook of a lifeline. However, because of this positional relationship, the parent rope 10 is entirely surrounded by the two support frames 18 and 20, so that even if various external forces are applied by a worker wearing the life rope or the like, the parent rope 10 passes through the notch 18a or 20a. Therefore, it does not jump out of the support frames 18 and 20. In the illustrated example, the master rope 10 is joined to the master rope relay bracket 22 at both outer peripheral portions of the master rope support device, so that the structure can be used in a combination of short ropes without using a special long rope. However, the essential function is the same as when the master cable relay bracket 22 is not used, and functions as a long single master cable as a whole. The connection between the master rope 10 and the master relay bracket 22 is performed by connecting the rings 10a and 22a and the rings 10b and 22b at the respective ends. In addition, flanges 22c and 22d are provided near both ends of the master rope relay bracket 22, and as will be described later, the master rope 10 slides on the support frames 18 and 20 and largely moves right and left. Plays a role in preventing.
[0012]
The lifeline 24 connected to the worker is connected to the master line 10 by an annular hook 24a at the tip. Thus, the worker wearing the lifeline 24 can be supported by the lifeline 24 and can be prevented from falling down even when the worker falls down by sliding his / her foot or the like. By the way, at the time of this fall, the master rope 10 is pulled toward the joint with the life rope 24 and slides. Accordingly, the worker moves longer by the initial slack length of the master rope 10. In particular, when the master rope 10 is long, the total length of the slack is also long, so that the moving distance of the worker is increased. Therefore, the main rope 10 is provided with flanges 22c and 22d, and has a function of preventing the main rope 10 from sliding by being caught by the flanges 22c and 22d at the outer end of the support frame 18 or 20 or between both when the fall occurs. ing. In the example shown in the figure, the flanges 22c and 22d are not directly attached to the master rope 10, but are installed at both ends of the master rope relay bracket 22, but the essential functions are the same.
[0013]
It is desirable that the worker wearing the lifeline 24 be able to move from one side of the master line support bracket to the other side with as little unnecessary movement as possible. In this case, it is important for safety that the lifeline 24 can pass through the parent line 10 without being removed. In the present invention, this function is realized by providing notches 18a and 20a in both support frames 18 and 20 and passing the hooks 24a through these portions. FIGS. 3, 4, and 5 illustrate the manner in which the hook 24a passes the main rope support device from the right side to the left side in the figure. The hook 24a, which was initially on the right side of the drawing, is lifted upward as shown in FIG. 3, and is passed through the notch 20a on the upper side of the support frame 20 from right to left. At an intermediate point between the two support frames, as shown in FIG. 4, the hook 24a is turned forward and lowered downward. Finally, as shown in FIG. 5, the hook 24a is passed through the notch 18a on the lower surface of the support frame 18 to the left side, and reaches the left side of the master rope support device.
[0014]
The width of the cutouts 18a and 20a of both support frames is slightly larger than the width of the hook 24a so that this series of operations can be performed. However, if the width is too large, a problem occurs in the support effect of the master rope 10. Therefore, the width of the hook 24a in the horizontal direction is made shorter than that in the vertical direction. Further, the width G between the two support frames 18 and 20 is such that the turning operation of the hook 24a can be performed without difficulty while maintaining the support effect of the master rope 10 in which the two support frames 18 and 20 function integrally. , Slightly larger than the thickness of the hook 24a.
[0015]
Note that the shapes of the support frames 18 and 20 may be more rounded or angular than those shown, as long as they provide the effects of the present invention. In addition, this shape may be different between the support frames 18 and 20 or may be the same to reduce the manufacturing cost. The positions of the notches 18a and 20a of the support frame are respectively set to the upper surface and the lower surface in the illustrated example. And so on. Further, more than two support frames may be provided to enhance the holding function of the master rope 10.
[0016]
Next, an example in which the master rope supporting device is installed on an elevator car will be described with reference to a top view of FIG. 6 and a side view of FIG. As shown in FIG. 6, in the elevator, a car 32 is placed in a hoistway 30, and a car upper frame 34 is provided on a ceiling portion of the car 32. Then, as shown in FIG. 7, the worker T rides on the car 32 and performs maintenance and inspection on the periphery of the car 32, and also performs maintenance and inspection inside the hoistway 30 while raising and lowering the car 32. At this time, the worker T wears a lifeline 24 to ensure safety. In the example of FIG. 6, the parent rope 10 that connects the lifeline 24 is installed so as to surround the outer edge of the car 32 by using the upper cage frame 34 and the columns 12 and 12a. Here, the main rope 10 is fixed by a carabiner-type fitting on the support 12a installed at the corners of the car upper frame 34 and the car 32, and the main support 10 is fixed on the support 12 installed on the side of the car 32. Supported by the instrument. Therefore, the worker T can move and work on the upper side or the lower side of the car 32 in FIG. 6 while the lifeline 24 is connected to the parent line 10.
[0017]
It should be noted that a plurality of main rope support devices and columns 12 can be installed on these sides according to the distance. When the overall length of the master rope 10 is short, the master rope 10 can be directly passed into the support frames 18 and 20 without using the master rope relay bracket 22. In this case, if the corners in the support frames 18 and 20 are rounded, the weight applied to the master rope 10 can be dispersed, and the safety is improved.
[0018]
In the embodiment described above, it has been assumed that the main rope support device is made of metal, but it is naturally possible to use an alternative material such as a synthetic resin having a strength equal to or higher than that of metal. . Further, the present invention is not limited to the example of the maintenance and inspection work of the elevator shown here, and can be applied to construction work and general maintenance and inspection work.
[0019]
【The invention's effect】
As described above, according to the first invention of the present application, the main rope supporting device that can pass through the hook of the life rope while being connected to the main rope is realized by a simple structure that does not include a mechanical part. It is hard to break down, and the cost required for manufacturing and maintenance can be reduced. Further, according to the second invention of the present application, even when the entire length of the master rope is long, the sliding length of the master rope can be shortened to shorten the moving distance, and the safety is improved. Further, according to the third invention of the present application, lifeline connecting means having efficiency, safety, and economy can be installed on a relatively large elevator car.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a view as viewed from an arrow A in FIG.
FIG. 3 is a view showing a manner in which a hook 24a of a lifeline moves on a support frame 20;
FIG. 4 is a view showing a state in which a hook 24a of a lifeline is located between both support frames.
FIG. 5 is a view showing a state in which a hook 24a of a lifeline moves on a support frame 18. FIG.
FIG. 6 is a diagram showing an example in which the device of the present invention is arranged on an elevator car.
FIG. 7 is a diagram showing a state where a worker puts on a lifeline on a car of the elevator.
FIG. 8 is a view showing a conventional example of a main rope supporting device.
[Explanation of symbols]
10 parent rope, 18, 20 support frame, 18a, 20a notch, 22 parent rope relay bracket, 22c, 22d flange, 24 life rope, 24a hook, 32 elevator car.

Claims (3)

A main rope supporting device for supporting a main rope to which an annular hook at a lifeline tip is coupled between both ends thereof,
Adjacent at a slightly wider interval than the thickness of the hook,
It has two support frames that hold the parent rope inside,
The support rope supporting device, wherein notches that allow the hooks to pass through the support frames are provided at different positions on the support frame. The parent support device according to claim 1,
A main rope support device, wherein the main rope is provided with a flange that cannot pass through the support frame. The parent rope support device according to claim 1 or 2,
A mainline support device attached to a roof portion of an elevator car.

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