JP6467305B2 - Fall prevention tool - Google Patents

Description

  The present invention relates to a fall prevention device suitable for application to a disaster prevention facility incidental to a surveillance camera installed at a high place, for example.

  For heavy equipment and devices installed in high places such as outdoor structures such as buildings and steel towers and indoor ceilings, the above equipment / Fall prevention measures are required to avoid the danger of equipment falling onto the ground, such as roads and floors.

  Even in a large surveillance camera equipped with a horizontal / vertical turning mechanism installed at a high place, a safer and more economically advantageous structure for preventing the fall is required.

  As a measure to prevent this camera from falling, conventionally, a surveillance camera installed at a high place is directly connected to a base fixed to the structure where the camera is installed with a wire rope. ) At a distance determined by the length of the wire rope.

  In this type of equipment installed in high places, the fall prevention measures using wire ropes are calculated according to the mass of the fall prevention object, and the rope diameter and fall distance of the wire rope to be used are examined. However, when the surveillance camera is dropped, the wire rope has a sudden tension, and both the wire rope and the surveillance camera receive the impact (drop impact) generated by the fall at the same time. For this reason, a wire rope having a large rope diameter and a large weight for safety is used for a surveillance camera including a turning mechanism having a large weight (a large mass). For this reason, conventionally, the handling of the wire rope was not easy, and a lot of time and labor were required for the attachment work, and there was a problem that the cost was increased economically. In addition, even if the wire rope breakage is avoided, a drop impact is directly applied to the surveillance camera that is the object of fall prevention via the wire rope. There was a problem inviting.

JP 2009-294455 A JP 2001-264867 A JP 2001-027289 A

  As mentioned above, in the fall prevention mechanism that directly connects the fall prevention target object with the wire rope, the workability is poor and economical because it uses a large-diameter wire rope that is safe enough to withstand the drop impact. In particular, there was a problem of incurring high costs. In addition, since the impact on the fall prevention target object when the fall prevention target object falls is directly applied to the target body via the wire rope, the fall prevention target object is subject to impact destruction even if the breakage of the wire rope is avoided. There were also problems with subsequent damage.

  This invention is made | formed in view of the said situation, and it aims at providing the fall prevention tool excellent in workability | operativity and economy which can relieve | shock the impact at the time of fall of the fall prevention target object connected to the rope.

  The present invention has a threading portion, and forms a loop portion that holds the fall prevention target object when the fall prevention target object falls, and passes the rope portion through the loop portion. A brake attached to the rope and slidable on a rope portion that bears a falling braking distance from a position at a distance from the threading part to the threading part, and the brake has a hole through which the loop part passes. A fall prevention device comprising a cylindrical case having both ends and a brake element housed in the case in pressure contact with the peripheral surface of the rope portion.

  In an embodiment of the present invention, in the fall prevention tool, the rope is formed of a wire rope, and the through portion is formed by end-treating one end of the wire rope in a loop shape. The brake is composed of a rubber pipe, and the case has an adjusting screw that compressively deforms the rubber pipe in the axial direction. The brake element engages with the fall prevention object or a part attached to the fall prevention object when the fall prevention object falls and positions the brake element with respect to the fall prevention object. It constitutes a joint.

  In addition, an embodiment of the present invention is a fall prevention tool for a surveillance camera comprising a turning unit that drives a camera body to turn in a horizontal and vertical direction, and a pedestal unit that supports the turning unit so that the turning unit can turn. A loop part wound around the pedestal part and forming a loop part wound around the pedestal part, and a wire rope passing through the loop part and being attached to the wire rope through the loop part. And a rope part that bears the falling braking distance from the position where the distance exists to the through part, and a brake attached to the wire rope so as to be slidable on the rope part. A cylindrical case having through-holes in both end walls, a rubber pipe accommodated in the case, and the rubber pipe provided in the case is compressed and deformed in the axial direction to And characterized by including an adjustment screw for pressing the rubber pipes on site.

  According to the embodiment of the present invention, it is possible to provide a fall prevention tool excellent in workability and economy that can alleviate an impact when a fall prevention target object connected to a rope is dropped.

The figure which shows the structure of the principal part for demonstrating the outline | summary of the fall prevention tool which concerns on embodiment of this invention. The disassembled perspective view which shows the structure of the brake device shown in the said FIG. Sectional drawing which shows the structure of the brake device shown in the said FIG. The perspective view which shows the example of attachment of the fall prevention tool which concerns on the said embodiment. The perspective view which shows the structure of the fall prevention tool in the said FIG. The perspective view which shows the other example of attachment of the fall prevention tool which concerns on the said embodiment.

  Embodiments of the present invention will be described below with reference to FIGS. The configuration of the fall prevention device according to this embodiment is shown in FIG. 1 to FIG. 3, and examples of attachment of the fall prevention device are shown in FIG. 4 to FIG. In this embodiment, the fall prevention object is fixed to a base provided at a high place of the structure where the fall prevention object is installed, for example, by bolting or the like, for example, due to a natural disaster such as an earthquake or a storm. An event where the fall prevention object falls off the base is simply referred to as the fall prevention object falling, and occurs on the rope engaged with the fall prevention object as the fall prevention object falls. An impact derived from a rope or an object to be prevented from falling due to a sudden tension is simply referred to as a drop impact.

  As shown in FIG. 1, the fall prevention device according to the embodiment of the present invention has a through portion 10 a and forms a loop portion Ra that holds the fall prevention target object A when the fall prevention target object A falls. Then, the rope 10 passed through the threading portion 10a and the loop portion Ra are attached to the rope 10 through the loop portion Ra, and the “falling braking distance from the position having a distance from the threading portion 10a to the threading portion 10a” And a brake 20 that can slide a rope portion Rb that bears "." In this embodiment, the rope 10 is constituted by a wire rope, and one end of the wire rope is terminated in a loop shape to form the through portion 10a, and the other end of the wire rope (not shown) is firmly attached to the base. It is connected with various connecting means. The same reference numeral 10 as the rope is used for this wire rope.

  The rear end in the sliding direction of the brake 20 that slides on the rope portion Rb of the wire rope 10 is a fall prevention target A or a component attached to the fall prevention target A when the fall prevention target A falls. The engaging part which positions the brake device 20 with respect to the fall prevention target object A is configured. In FIG. 1, when the fall prevention target A falls, the rear end of the brake 20 in the sliding direction is engaged with the fall prevention target A, and the brake 20 is held by the fall prevention target A. However, the brake 20 may be configured to be fixed to the fall prevention target A so that the rope portion Rb can slide.

  As shown in FIGS. 2 and 3, the brake 20 has a cylindrical case 21 having holes h <b> 1 and h <b> 2 through which the loop portion Ra passes, and the case 10 in a state of being pressed against the peripheral surface of the rope portion Rb. And the adjusting screw 23 for adjusting the braking force (friction force) of the braking element 22. The adjustment screw 23 having the hole h1 is screwed into one end side of the case 21, and the frictional force of the brake element 22 against the rope portion Rb is adjusted by the screwing amount of the adjustment screw 23. Here, the case 21 has a threaded portion 21 a on the inner wall on one end side, the adjustment screw 23 has a screw-in portion 23 a that is screwed into the threaded portion 21 a, and the adjustment screw 23 is pivoted with respect to the case 21. It is screwed so as to be displaceable in the direction (screwing direction). The brake element 22 constitutes a so-called brake shoe, and here is constituted by a rubber pipe having a cylindrical shape and a cut groove 22s in the axial direction. The same reference numeral 22 as that of the brake is used for the rubber pipe. The adjusting screw 23 forms a pressure contact surface f in contact with the end face of the rubber pipe 22 at the tip of the screw-in portion 23a. The adjustment screw 23 is screwed into the case 21, so that the pressure contact surface f causes the rubber pipe 22 to extend in the axial direction along the rope portion Rb. The rubber pipe 22 to be pressed is compressed and deformed. The braking force of the brake 20 accompanying the compression deformation of the rubber pipe 22, that is, the frictional force of the rubber pipe 22 against the rope portion Rb is adjusted by the adjusting screw 23 in consideration of the mass (weight), structure, etc. of the fall prevention target A. Thus, it is desirable to adjust the frictional force so that the brake 20 stops at a position immediately before the through portion 10a which is the end of the drop braking distance of the rope portion Rb when the fall prevention target A falls. Further, the cut groove 22s provided in the rubber pipe 22 replaces the rubber pipe when the frictional force of the rubber pipe 22 with respect to the rope portion Rb is selected according to the mass of the fall prevention object A, or replaces the rubber pipe in the maintenance work or the rubber pipe. It is a slit-shaped kerf that is not directly related to the braking action for easily enabling retrofitting.

  In the fall prevention device having the above-described configuration attached to the fall prevention target A, when the fall prevention target A falls from the base, the brake 20 engages with the fall prevention target A along with the fall, and the brake 20 falls. The prevention target object A is carried as a load body, and the fall speed of the fall prevention target object A is decelerated by a braking force caused by friction with the rope portion Rb. When the brake 20 engages with the fall prevention object A and slides on the rope portion Rb that bears the fall braking distance, the fall prevention object A that has fallen from the base is held by the wire rope 10, and the fall prevention object A Falling on the ground such as roads and floors is avoided.

  Due to the braking action of the brake 20 described above, the brake 20 functions as a shock-absorbing member for the drop impact, and mitigates the drop impact on the wire rope 10 and the fall prevention target A. With this drop impact mitigating action, the wire rope used in the fall prevention tool can be replaced with a thick, lightweight, and expensive one that is safe from the previous drop impact and with a small diameter, light weight, and low cost. it can. As a result, the wire rope attaching operation can be performed easily and quickly, the working efficiency can be improved, and an economically advantageous configuration can be obtained. Furthermore, the drop impact can be reduced with respect to the fall prevention target A, and the fall prevention target A can be protected from the drop impact.

  A more embodied configuration of the fall prevention device according to the embodiment is shown in FIGS. 4 and 5, and another configuration example is shown in FIG. 6. Here, a fall prevention device is shown which is a large surveillance camera with a horizontal / vertical turning mechanism installed at an altitude such as an outdoor structure such as a building or a steel tower or an indoor ceiling. 4 to 6, the brake 20 shown in FIGS. 1 to 3 is used.

  The fall prevention device according to this embodiment is a surveillance camera provided with swivel units 2 and 3 that pivotally drive the camera body 2a in the horizontal and vertical directions, and a pedestal unit 4 that supports the swivel units 2 and 3 so as to be pivotable. A wire rope 10 having a loop portion Ra that is wound around the pedestal portion 4 and passed through the threaded portion 10a, and the loop portion. The rope portion Rb can be slid on a rope portion Rb that is attached to the wire rope 10 through the Ra and bears a “fall braking distance” from a position that is spaced from the passage portion 10a to the passage portion 10a. A brake 20 attached to the wire rope 10 and a wire rope fixing bracket fixed to the pedestal portion 4 and engaged with the brake 20 when the monitoring camera 1 falls. If, it is guided by the wire rope fixing bracket 5, the other end of the wire rope 10 wound around the base portion 4 is configured by including a rope fixing means for connecting to the base through the through portion 10a.

  The wire rope fixing bracket 5 positions the winding guide groove 51 that guides the winding position of the loop portion Ra wound around the pedestal portion 4 and the brake 20 on the pedestal portion 4 of the monitoring camera 1 to the pedestal portion 4. And an engaging portion 52 that holds the brake 20. In this embodiment, when the monitoring camera 1 is dropped, the rear end in the sliding direction of the brake 20 sliding on the rope portion Rb is engaged with the engaging portion 52, and the brake 20 is monitored via the wire rope fixing bracket 5. The brake 20 is held by the monitoring camera 1 while being locked to the base 4 of the camera 1.

  In addition, the rope fixing means loops the other end of the wire rope 10 by terminal processing in the same manner as the above-described passage portion 10a to form a hooking portion 10b, and hooks the hooking portion 10b on the shackle 9 fixed to the base. The wire rope 10 wound around the pedestal portion 4 through the passage portion 10a is fixed to the base.

  In the fall prevention device having the above-described configuration attached to the surveillance camera 1, when the surveillance camera 1 as the fall prevention object falls from the base, the brake 20 is fixed to the pedestal portion 4 along with the fall of the surveillance camera 1. It is engaged with the engaging portion 52 of the wire rope fixing bracket 5 and is held by the monitoring camera 1. The brake 20 held by the monitoring camera 1 slides on the rope portion Rb that bears the falling braking distance of the wire rope 10 with the braking force associated with the friction force adjusted by the adjusting screw 23, and decelerates the falling speed of the monitoring camera 1. Let When the brake 20 is engaged with the pedestal 4 of the monitoring camera 1 and slides on the rope portion Rb that bears the falling braking distance, the monitoring camera 1 that has fallen from the base is held by the wire rope 10 and the road of the monitoring camera 1 Falling on the ground such as the floor is avoided.

  Due to the braking action of the brake 20 described above, the brake 20 functions as a shock-absorbing member for the drop impact, and the drop impact on the wire rope 10 and the monitoring camera 1 is mitigated. With this drop impact mitigating action, the wire rope used in the fall prevention tool can be replaced with a thick, lightweight, and expensive one that is safe from the previous drop impact and with a small diameter, light weight, and low cost. This can improve work efficiency and implement an economically advantageous fall prevention measure. Furthermore, the surveillance camera 1 is also reduced in impact by dropping, and the surveillance camera 1 is connected to the revolving parts 2 and 3, the connection part between the revolving part 2 and the pedestal part 4, and the camera body 2 a, and so on. The mechanical part can be protected from a drop impact.

  Moreover, since the wire rope 10 to be used can be reduced in diameter and weight, it is possible to shorten the rope length from the other end of the wire rope 10 to the pedestal portion 4 (to make the fall distance as short as possible). A drop impact applied to the monitoring camera 1 can be further reduced.

  Further, by placing the brake part 20 so that the rope portion Rb is slidable with the rear end in the sliding direction in contact with the engaging portion 52, the falling speed can be reduced immediately after the monitoring camera 1 is dropped. , Drop impact can be reduced.

  In addition, since a resilient member such as a coil spring or a rubber rope is not interposed in the loop around which the surveillance camera 1 is wound, it is possible to avoid a problem due to a rebound phenomenon when the surveillance camera 1 to be dropped is dropped.

  In the embodiment shown in FIGS. 4 and 5 described above, the wire rope 10 is wound around the pedestal portion 4 using the wire rope fixing bracket 5, but the pedestal portion 4 of the surveillance camera 1 is not used without using the wire rope fixing bracket 5. Another embodiment in which the wire rope 10 is wound is shown in FIG. In addition, the same code | symbol is attached | subjected to the same part as the component shown in FIG. 4, FIG.

  In the embodiment shown in FIG. 6, the brake 20 is passed through the wire rope 10 and the brake 20 is slidably attached to the wire rope 10. The wire rope 10 to which the brake 20 is attached is passed through the through portion 10 a and the through portion 10 a. A loop including the brake 20 is formed around the base portion 4 with the brake 20 in contact with the rope 20, and the rope end of the wire rope 10 opposite to the threaded portion 10 a is coupled to the base. Here, among the loops formed around the pedestal 4, the difference between the loop length wound around the pedestal 4 when the surveillance camera 1 falls and the loop length of the loop is shown in FIGS. 4 and 5. It corresponds to the rope portion Rb that bears the fall braking distance, and the rope portion wound around the pedestal portion 4 corresponds to the loop portion Ra shown in FIG.

  In the configuration in which the loop including the brake 20 is formed around the pedestal portion 4, when the monitoring camera 1 falls from the base, the brake 20 in contact with the through portion 10a starts braking and corresponds to the rope portion Rb. The falling speed of the surveillance camera 1 is decelerated by sliding the loop with the braking force accompanying the frictional force of the brake 20.

Also in this embodiment, the brake 20 acts as a shock absorber for the drop impact, and can reduce the drop impact applied to the wire rope 10 and the monitoring camera 1. The present invention is not limited to the above embodiment as it is. In the implementation stage, the constituent elements can be modified and embodied without departing from the spirit of the invention. As a specific example, in this embodiment, the through portion 10a is configured by loop processing in the end processing of the wire rope 10, but the through portion 10a may be configured by, for example, crimp terminal processing, open terminal processing, or the like. Further, the fixing means of the wire rope 10 is not limited to the above-described embodiment, and may be other fixing means such as a fixing means using an eyebolt or a tight attachment to a base. The configuration of the brake 20 is not limited to that of the above-described embodiment. For example, a configuration using lead as a brake or a cap is screwed into both ends of a cylindrical case, and the frictional force of the brake is set according to the screwing amount. The structure etc. to adjust may be sufficient.

  As described above, according to the embodiment of the present invention, it is possible to provide a fall prevention device excellent in workability and economy that can alleviate an impact when the fall prevention target object connected to the rope is dropped.

  DESCRIPTION OF SYMBOLS 1 ... Surveillance camera, 2, 3 ... Turning part, 4 ... Base part, 5 ... Wire rope fixing bracket, 10 ... Rope (wire rope), 10a ... Passing part, 20 ... Brake, 21 ... Case, 22 ... Brake ( Rubber pipe), 23 ... adjusting screw, Ra ... loop part, Rb ... rope part.

Claims (7)

A rope that has a threaded portion and that is passed through the threaded portion to form a loop portion that holds the object to be dropped when the object to be dropped is dropped;
A brake that is pierced through the loop portion and is attached to the rope, and is capable of sliding a rope portion that bears a falling braking distance from a position at a distance from the passage portion to the passage portion;
Comprising
The brake is
A cylindrical case having holes at both ends through which the loop portion passes;
A brake housed in the case in a state of being pressed against the peripheral surface of the rope portion;
A fall prevention device characterized by comprising:   The fall prevention tool according to claim 1, wherein the rope is formed of a wire rope, and the through portion is formed by terminating one end of the wire rope in a loop shape.   The fall prevention device according to claim 1, wherein the brake element is formed of a rubber pipe, and the case includes an adjusting screw that compressively deforms the rubber pipe in an axial direction.   The rear end in the sliding direction of the brake that slides on the rope part engages with the fall prevention object or a part attached to the fall prevention object when the fall prevention object falls, and the fall prevention object The fall prevention tool according to claim 1 or 3, comprising an engaging portion for positioning the brake with respect to an object.   The fall preventive device according to claim 1 or 3, wherein the brake is fixed to the fall prevention object so that the rope portion can slide. A surveillance camera fall prevention device comprising a turning part that drives the camera body to turn horizontally and vertically, and a pedestal part that rotatably supports the turning part,
A wire rope having a threaded portion that is terminal-treated in a loop shape, forming a loop portion wound around the pedestal portion, and being passed through the threaded portion;
The rope portion is attached to the wire rope through the loop portion, and the rope portion bears a falling braking distance from a position having a distance from the passage portion to the passage portion. An installed brake,
Comprising
The brake is
A cylindrical case having holes on both end walls through which the wire rope passes,
A rubber pipe housed in the case;
An adjustment screw that is provided in the case and compresses and deforms the rubber pipe in the axial direction to press the rubber pipe against the rope portion;
A fall prevention device characterized by comprising:   The fixing bracket further includes a fixing bracket fixed to the pedestal portion, and the fixing bracket includes an engaging portion that engages with the brake when the monitoring camera falls and positions the brake with respect to the monitoring camera. The fall prevention tool according to claim 6.

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