JPH0241983B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a guideline retaining fitting for a device that protects the safety of workers who ascend and descend utility poles, steel towers, and other high-rise structures by preventing them from falling. This type of safety device must have the strength to withstand the impact load at the time of a fall, and not only to hold and hold a falling human body, but also to prevent noise from rolling due to wind pressure, etc. when not in use. In addition, it was necessary to consider the problem of wear of the retaining fittings and the guideline attachment part due to vibration. In addition, when working on utility poles, when working on a utility pole by wrapping a safety belt rope around the guideline and entrusting the entire body's weight to the work, a considerable load is applied to the guideline, causing the upper and lower retaining parts to loosen, resulting in permanent damage to the guideline as described above. There was a possibility that distortion would occur.

The present invention takes such a situation into consideration and aims to provide a retaining fitting for a fall prevention device that is capable of constantly applying a predetermined tension to its guideline in a fall prevention device that is attached to a utility pole or the like. It is something. Another purpose is to adjust the elasticity of the spring in advance and rotate the arm to match a predetermined mark when attaching the retaining fitting of the present invention to a telephone pole or the like and applying a predetermined tension to the guideline. This is to apply a predetermined tension to the guideline.

Aspects of the invention will now be described in detail with reference to an embodiment illustrated in the accompanying drawings.

As shown in the figure, this embodiment consists of a main body 1, an arm body 2, and a coil spring 3. A band attachment part 12 is bored at a symmetrical position, a notch 17 is provided in the center, and a pivot hole 41 is bored inside the notch 17. Also, there is a notch 1 at the center of the width direction at the tip of the leg side 16.
8, and connecting holes 13, 13 are provided slightly inside thereof, and the head side 15 leaves the width of the notch 17, and the leg side 16 leaves the width of the notch 18, and both sides are parallel to each other in the same direction. The head side 15 and the leg side 16 form the side wall 11, and the head side 15 is formed due to the difference in notch width.
The bending width of the side wall 11 portion formed by bending the side wall 11 is wider than that of the side wall 11 portion formed by bending the leg side 16, so that the head side 15 of each side wall 11 and the leg side A main body 1 having an approximately L-shaped side surface is formed with a step near the boundary of the 16 parts. Also, the band attachment part 12
The side wall 11 having a pole cover 1 is bent in the opposite direction along its entire length by the depth of the notch 17.
4 and 14, and the band attachment part 12 is made by punching out the other side, leaving one part on the telephone pole side, and bending them inward.
The facing plate 20 is formed by welding and joining the opposing edges. The arm body 2 is bent to have a U-shaped cross section, and a coupling hole 24 is bored in the center of each side piece.A shaft through hole 21 and a spring receiving part 22 are provided at the bottom of the base end, and a guideline is provided at the bottom of the tip. The mounting portion 23 is formed by drilling.

An arm body 2 is placed between both side walls 11, 11 of the main body 1.
The proximal end sides of the two coupling holes 13 and 2 are inserted and overlapped.
4 and pivot it so that it can rotate freely. With one end of the coil spring 3 in contact with the spring receiver 22 of the arm body 2 and the spring receiver plate 4 in contact with the other end of the coil spring 3, insert the shaft of the arm body 2 through the shaft stopper hole 41 of the main body 1. An adjustment shaft 5 is provided so as to penetrate through the spring receiving plate 4 through the hole 21, and a nut 42 is screwed onto the adjustment shaft 5. Note that it is also possible to use a stiff spring instead of a coil spring.

To use the present invention having the above configuration, the eighth
As shown in the figure, the utility pole band 6 is inserted into the band attaching part 12 by placing the utility pole abutment piece 14 and the abutment plate 20 of the main body 1 on a predetermined portion of the lower part of the utility pole P, and then attaching it by tightening the mounting bolt 7. After inserting the bolt fixed to the end of the guideline 8 hanging from the top of the utility pole into the guideline attachment part 23 at the tip of the arm part 2, tighten the nut 9 and connect it, and by continuing to tighten the nut, the intermediate part of the arm part 2 and the main body 1 are connected.
The arm body 2 rotates using the shaft 25 connected thereto as a fulcrum, and the coil spring 3 in the main body 1 is pressed, and the guideline 8 is fixed in a tensioned state with the coil spring 3 contracted. Incidentally, as shown in FIG. 1, the guideline 8 hangs down from another retaining fitting attached to the upper part of the utility pole.

Workers working at heights climb up and down telephone poles and steel towers with a safety device (not shown) that they carry separately fitted to Guideline 8, but if they slip and fall while climbing or descending, they should immediately The safety device grabs the guideline and stops the vehicle, preventing it from falling.

The present invention is constructed as described above, and even when the fall prevention device is installed on a utility pole or the like for a long period of time, the elasticity of the spring 3 is always applied to one end of the guideline 8 via the arm body 2 to maintain the tension of the guideline. Since it has been added as a guideline 8, wind pressure and loads during lifting and lowering of workers and during work have been added to Guideline 8.
Even if the guideline 8 is subjected to pressure, the guideline 8 does not loosen or undergo permanent distortion, and can always maintain a tensioned state. Therefore, the safety device used by the worker can be moved up and down smoothly. Also, guideline 8
Even when natural elongation occurs, the guideline 8 can be easily tensioned by tightening the nut 9 holding the guideline 8 or by tightening the nut 42 of the adjustment shaft 5 holding the spring 3. Can be done. Further, in the present invention, since the elastic force of the spring 3 is transmitted to the guideline 8 via the arm body 2, by changing the position of the support point of the arm body 2, that is, the connecting shaft 25, the guideline is It is possible to adjust the load applied to the

Further, in the present invention, the base end portion of the arm body 2 provided with the spring receiving portion 22 is fitted into the both side walls 11, 11 of the body 1 to hold the spring 3 within the body. It has remarkable effects, such as preventing foreign objects from getting stuck in it and ensuring that a predetermined elasticity is always obtained.

In addition, in order to achieve other objects of the present invention, the ninth
As shown in FIGS. 10 and 11, an indicator hole 19 is formed in the side wall 11 of the main body 1.
A protrusion 26 is provided as a mark, and a tension confirmation device 28 is provided at the base end of the arm body 2 corresponding to the display hole 19, and a display line 27 is provided as a mark.

To use this tension checking device 28, when assembling the retaining fitting of the present invention at a factory, the spring 3 is set to a free length state, the main body 1 is held in a state fixed to an object, and the guideline mounting portion 2 of the arm body 2 Set the load transducer in the direction of arrow A. In this state, align the protrusion 26 of the tension checking device 28 with the display line 27 and sequentially tighten the nut 42 of the spring adjustment shaft 5 to increase the elastic force of the spring 3, and the corresponding force will be displayed on the load converter. . Guideline 8 now
If the installed tension is 100 kg, adjust the elastic force of the spring 3 by tightening the nut 42 until the display on the load converter shows 100 kg, so that the protrusion 26 of the tension checking device 28 and the display line 27 match. In order to prevent the nut 42 of the adjustment shaft 5 from loosening in the state where the adjustment shaft 5 is in the position, a spring is passed through the adjustment shaft 5 or fixed with a double nut or the like. After the load is removed, the arm body 2 will be in a rotated state due to the spring 3, but since the position of the nut 42 is fixed, the desired installation tension can be ensured by matching the tension confirmation device. In this manner, the elasticity of the spring is adjusted in advance to the tension of the guideline 8 during the assembly process at the factory before shipment. When attaching this to a utility pole or the like and connecting the guideline 8 to it, and applying tension to it, adjust the tightening state of the nut 9 that connects the end of the guideline 8 to the protrusion 26 of the tension checking device 28 and the display line. Since the predetermined tension (100Kgf) set at the factory can be applied to the guideline 8 by adjusting it so that it matches with the tension checking device 28, there is no need to check the tension of the guideline each time at the installation site. The tension can be easily adjusted to a constant level just by checking the tension, making the installation work simple and reliable.
In addition, if the guideline 8 is slack after installation, it can be easily determined by looking at the tension confirmation device 28, so the tension of the guideline can be easily and easily adjusted on the spot without the need for a tension meter or the like. There are remarkable effects such as being able to do the following.

Further, the tension checking device 28 is provided with a scale 29 on the edge of the display hole 19 as shown in FIG.
By aligning the display line 27 with the scale,
It is also possible to configure the guideline 8 to apply the tension of the matched scale.

Further, as another embodiment of the tension checking device 28, the pin fitting hole 32 of the main body 1 and the pin receiving hole 30 of the arm body 2 overlap at the position where the mark provided on the arm body 2 corresponds to the mark of the display hole 19 of the main body 1. The marks on the main body 1 and the arm body 2 correspond to each other when the guideline is tensioned on site, and a pin made of synthetic resin is inserted into the pin insertion hole 32 to confirm this when the task of applying a predetermined tension force is completed. Insert 31.
The pin receiving hole 30 of the arm body 2 is inserted into the pin insertion hole 32.
are polymerized and penetrate both the main body 1 and the arm body 2. This state in which the pin 31 can be inserted means that the marks on the main body 1 and the arm body 2 match, which is proof that a predetermined tension has been applied to the guideline, and the tension can be adjusted by inserting the pin 31. It is possible to prevent forgetting. In addition, the pin 31 made of resin has a shape in which the tip becomes thinner when it is inserted so that it can be inserted, and it opens after being inserted to prevent it from falling out, so it will not fall out even with a slight vibration and has the same lifespan as the present invention. It is something that you have.

The pin 31 having the above structure is used not only as the tension checking device 28, but also in the event of a drop, the guideline will go down in the direction opposite to the direction of arrow A in FIG. As a result, the pin 31 made of resin is crushed between the side walls 11 of the main body 1 and its head flies off, but even if it does not result in a fall, in the event that the person's limbs slip and they attach themselves to a telephone pole in a hurry, Although there will be no permanent deformation of the guideline and its upper fixing metal fittings, if the pin 31 is torn due to the instantaneous impact, the guideline itself and its upper fixing point may stretch, and in such a case, the guideline should be It is possible to confirm the presence or absence of re-tension.

Moreover, this tension checking device 28 can also be constructed by attaching a scale or the like to the end where the side wall 11 of the main body 1 and the arm body 2 overlap, without drilling the display hole 19. be.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing how a fall prevention device using the present invention is installed on a utility pole, Fig. 2 is an exploded perspective view of the main body of the present invention, Fig. 3 is a plan view of the present invention, and Fig. 4 is a diagram of the present invention. A partially cutaway front view, Figure 5 is a bottom view,
Figure 6 is its left side view, Figure 7 is its right side view,
Figure 8 is a diagram of the installation of the present invention on a utility pole, Figure 9, and Figure 1.
0 and 11 are partially enlarged front views showing an embodiment of the tension checking device of the present invention. In the figure, 1 is the main body, 2 is the arm body, 3 is the coil spring, 4 is the spring receiving plate, 5 is the adjustment shaft, 12 is the band attachment part, 13 and 24 are the coupling holes, 23 is the guideline attachment part, and 25 is the coupling The shaft, 28, is a tension confirmation device.

Claims (1)

[Scope of Claims] 1. Consists of a main body 1 to be attached and fixed to a telephone pole and an arm body 2 rotatably connected to the main body 1. The arm body 2 can be rotated by applying elasticity of a spring to one end of the arm body 2. A retaining metal fitting for a fall prevention device, characterized in that it rotates and applies tension to a guideline connected to the other end. 2 Approximately L-shaped side walls 11 are held oppositely, a band attachment part 12 is provided on one side piece, a coupling hole 13 is provided on the other side piece to form the main body 1, and a shaft through hole 21 is provided at the base end. A spring receiving part 22 is provided, a guideline attachment part 23 is provided at the tip part, and a coupling hole 24 is provided in the center part to form the arm body 2, and the side walls 11, 11 of the main body are
Both coupling holes 13, 2 are connected by fitting the arm body 2 between them.
The coil spring 3 is connected to the spring receiving part 22 of the arm body 2 so that the coil spring 3 is connected to the spring receiving part 22 of the arm body 2.
The adjusting shaft 5 is provided between the main body 1 and the spring receiving plate 4 with one end in contact with the other end and the spring receiving plate 4 disposed on the other end, and the coil spring 3 and the shaft through hole 21 of the arm body 2 being loosely fitted. The retaining metal fitting for a fall prevention device according to claim 1, characterized in that it holds a coil spring 3. 3 Consists of a main body 1 that is attached and fixed to a telephone pole and an arm body 2 that is rotatably connected to the main body 1. By applying the elasticity of a spring to one end of the arm body 2, the arm body 2 rotates, and the other end is rotated. In the case where tension is applied to the guideline 8 connected to the main body 1
and a tension checking device 28 that adjusts the tension of the guideline 8 by providing corresponding marks on the arm body 2 and adjusting the elasticity of the spring using the adjustment shaft 5 so that the predetermined marks correspond to each other. Retaining metal fittings for fall prevention devices. 4. The tension checking device 28 is characterized by having a structure in which a mark provided on the arm body 2 corresponds to a protrusion or a scale provided in the display hole 19 bored in the main body 1, thereby adjusting the tension of the guideline 8. A retaining fitting for a fall prevention device according to claim 3. 5 The tension confirmation device 28 matches the mark provided on the arm body 2 with the protrusion or scale provided in the display hole 19 drilled in the main body 1, and at the same time matches the pin insertion hole 32 of the main body 1 provided in the arm body with the mark provided on the arm body 2. 4. The retaining fitting for a fall prevention device according to claim 3, characterized in that the pin 31 is fitted into the pin receiving hole 30 of the guideline 8, whereby the tension of the guideline 8 can be kept constant.