JP2012245217A - Falling preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a falling preventing device having a falling preventing function not inhibited by an external obstacle or the like.SOLUTION: The falling preventing device includes: a body base portion 2 including a roller 17 fitted to and traveling on an elongated rigid rail laid on a high-rise building including an iron tower or pole; a fixed guide portion 5 extending from the rear part of the body base portion 2; a lever plate 3 having one end provided with a braking portion 25 for emergency or the like, and rotatably connected to the front part of the body base portion through a lever plate-receiving shaft 21; a connection plate 4 provided with an annular portion 26 for connecting a life rope of a worker or the like, rotatably connected to an end part of the lever plate 3 through a front connecting plate-receiving shaft 22, and slidably connected to the guide portion 5 through a slider joint. Further, the end of the guide portion 5 is expanded to form a cover portion 6 so that a rear front part 29 of the connection plate 4 is covered within the moving range of the connection plate 4.

Description

  TECHNICAL FIELD The present invention relates to a fall prevention device when moving up and down and working in a high-rise building including various steel tower columns. More specifically, the fall prevention device of the present invention is fitted to a rail for a fall prevention device laid in the vicinity of elevating equipment of a high-rise building, for example, a step, a ladder, a step bolt, etc., via a life rope or the like. This prevents a worker who moves as one.

  In high-rise buildings that include various types of steel tower pillars, workers etc. have been working at high places using life ropes to prevent crashes, etc. In order to alleviate the hassle of changing ropes, rails for fall prevention devices are laid in the vicinity of elevating equipment for high-rise buildings such as steps, ladders, step bolts, etc. A safety device for preventing the fall that attaches the fall prevention device and connects the life rope to the fall prevention device so that the worker can easily move along with the fall prevention device via the life rope. Facilities are in use.

  For example, Patent Document 1 describes a crash prevention device that includes a roller that fits and runs on a long rigid rail laid on a conventional steel tower column or the like and a braking member in an emergency. FIG. 2 is an explanatory view of a conventional fall prevention device, and shows a state where the rail is installed on a rail, with a side surface of the rail being broken. FIG. 3 is an explanatory view of a cross section of a rail for a fall prevention device.

  A crash prevention device 1 'shown in FIG. 2 is a long, hollow, prismatic rigid rail having a rear surface attached to a structure, an opening groove 12 provided in the center of the front surface, and a running surface 13 formed on both sides thereof. 11 is fitted and mounted along the rail 11.

  First, the direction of the crash prevention device expressed in this specification is defined. When the fall prevention device 1 shown in FIG. 1 is placed so that the roller 17 is in contact with a horizontal plane, the ground side is defined as the lower side and the sky side is defined as the upper side. The left side in FIG. Moreover, when the fall prevention device 1 is normally attached, the direction in which the fall prevention device 1 is accompanied when climbing to a high place is defined as the front, and the direction in which the fall prevention device 1 is accompanied when descending is defined as the rear. In FIG. 2, the upper side corresponds to the front. In the following, description will be made with directions and positions corresponding to this.

  In the crash prevention device 1 'shown in FIG. 2, two sets of rollers 17 are rotatably mounted on the axle 16 of the lower main body base 2. As shown in FIG. The lever plate 3 is rotatably connected to the front of the main body base 2 via a lever plate receiving shaft 21, and the connecting plate 4 is connected to the lever plate 3 via a front connecting plate receiving shaft 22 so as to be rotatable. . The connecting plate 4 is provided with a ring portion (trunk through-hole) 26 and a long hole (guide hole) 24 for connecting a worker's life rope and the like. A bifurcated portion (guide portion) 5 that is fixed to the main body base 2 and extends upward is provided behind the main body base 2. A rear connecting plate receiving shaft 23 provided at the tip of the bifurcated portion (guide portion) 5 and a long hole (guide hole) 24 of the connecting plate 4 are slidably engaged. By these connections, one fixed link (the main body base 2 and the forked portion 5 fixed to the main body base 2), two movable links (the lever plate 3, the connecting plate 4), and two joint pins (the lever plate) A link mechanism comprising a receiving shaft 21, a front connecting plate receiving shaft 22) and one slider joint (a rear connecting plate receiving shaft 23 and a long hole guide hole 24) is formed.

  Further, the lever plate 3 is urged to rotate clockwise in FIG. 2 by the coil spring 27, and the braking portion 25 at the tip of the lever plate 3 is in light contact with the running surface 13 of the rail 11. An operator's life rope or the like is connected to the ring portion (trunk through hole) 26 of the connecting plate 4. Here, the lever plate 3 has two plate-like bodies, and the bifurcated portion (guide portion) 5 also has two plate-like body configurations, and the connection plate 4 is sandwiched between them. The connecting plate 4 to be hooked also plays a role of guiding so as to restrict the movement of the connecting plate 4 in a direction outside a predetermined range formed by these link mechanisms.

  Next, an example of ascending / descending work by laying a safety device for preventing a fall having such a configuration on a transmission line tower will be described. An operator who brought the fall prevention device 1 'is a lever in front of the lowermost end of the rail 11. The roller 17 is fitted into the hollow portion of the rail 11 with the plate 3 facing upward. In this case, the lever plate 3 and the connecting plate 4 are positioned outward from the opening groove 12 on the traveling surface 13 side of the rail 11 together with a part of the main body base 2. Although illustration is omitted, in the state where the waist belt of the worker and the torso through hole 26 provided in the connecting plate 4 of the fall prevention device 1 ′ are connected via a life rope, the worker can Ascend along the bolt etc. with the fall prevention device 1 '. At the time of this climbing tower, the life rope pulls the connecting plate 4 forward through the trunk line hole 26, and accordingly, the lever plate 3 is also lifted forward against the bias of the coil spring 27. Since the contact with the rail 11 is released, the fall prevention device 1 'is accompanied forward (in the direction of ascending tower).

  Further, when descending the tower, the operator pulls the waist, so that the connecting plate 4 can be lifted forward by the life rope so that the contact between the braking portion 25 at the tip of the lever plate 3 and the rail 11 can be released. It is possible to drop the tower together by running the fall prevention device 1 'backward (toward the tower).

  Further, when the worker stops in the middle of raising and lowering, the life rope is slightly loosened and the urging force of the coil spring 27 is utilized to lightly contact the braking portion 25 at the tip of the lever plate 3 of the fall prevention device 1 ′ with the rail 11. It is possible to stop it.

  In the event of an emergency such as operator slipping, first, when the life rope of the fall prevention device 1 ′ is loosened, the connecting plate 4 and the lever plate 3 are instantly activated by the urging force of the coil spring 27, and the lever plate 3 The crash prevention device 1 ′ stops suddenly when the braking portion 25 at the tip comes into contact with the running surface 13 of the rail 11. Subsequently, a large impact force due to the operator's body weight is applied to the connecting plate 4 via the life rope so as to be pulled backward (downward in FIG. 2). Propagated to 25. Accordingly, the braking unit 25 engages with the running surface 13 of the rail 11 in cooperation with the roller 17 in contact with the running back surface 14 of the rail 11, and securely fixes the fall prevention device 1 ′ at that position on the rail 11. To prevent the operator from crashing.

  The crash prevention device shown in Patent Document 2 is the product technology of the earliest stage, and the crash prevention device of Patent Literature 1 described above adopts a basic device and has a higher locking performance by cooperating with the braking portion and the rail. It has been done.

JP 2001-333993 A Japanese Patent Publication No.55-35142

  Although the crash prevention devices disclosed in the above-mentioned patent documents have been further improved in the technical accuracy that has been followed, in recent years, they have coped with a variety of work in high places and other forms of tower columns. Further improvement is required so that the system can be used in all cases, and the present invention has been made to solve the problem of improving the braking mechanism in which the operating fall prevention device is particularly activated when an emergency occurs.

As an example of work in high places, steel tower columns and high-rise buildings are laid with multiple rails for fall prevention devices. There are often situations where the tower descends due to rails from the laying point. In this case, the worker performs the work by replacing the fall prevention device with a dedicated fall prevention device at the work site. It is necessary to carry it to the work site by another rail that descends. At this time, a plurality of fall prevention devices are connected and fitted to the rail to be moved up and down. In this process, the fall prevention devices connected in close proximity may come into contact with each other.
In the case of the fall prevention device of Patent Document 1, the rear end portion 29 provided with the long hole (guide hole) 24 of the connection plate 4 of the fall prevention device 1 ′ comes into contact with an external object, and the connection plate 4. When the movement of the lever is hindered, the movement of the lever plate 3 is also hindered. In the unlikely event that the rear end portion 29 of the connecting plate 4 is pushed forward from the outside, the connecting plate 4 is pushed forward and upward, and the braking portion 25 at the front end of the lever plate 3 is brought into contact with the running surface 13 of the rail 11. Freed from contact. However, in such a situation, even if there is an obstacle in the vicinity of the rail, if the obstacle keeps pushing up so that the braking of the fall prevention device is locked by the obstacle, this obstacle Since it prevents the fall itself from stopping the fall prevention device 1 ', it is unlikely that a major problem will occur unless the fall prevention device 1' is forcibly locked by another object. .

  In the case of the crash prevention device of Patent Document 1, when a plurality of the crash prevention devices are connected close to each other, the rear end portion provided with a long hole (guide hole) 24 of the connecting plate 4 of the fall prevention device 1 ′ located in the front is provided. 29 is in close contact with and contacts the fall prevention device 1 ′ located behind. For this reason, when the fall prevention device 1 'located at the rear is pulled up, the connecting plate 4 of the fall prevention device 1' located at the front is pushed upward in the forward direction. Therefore, the fall prevention device 1 'located at the front is used as a lever plate. 3 brake parts 25 are released from contact with the running surface 13 of the rail 11.

  Further, when a plurality of crash prevention devices are connected and run along the rails when moving up and down, it is necessary to push up all the connecting plates 4 of the individual crash prevention devices 1 'to release the braking. However, since it is complicated to connect the life rope to the connecting plates 4 of all the fall prevention devices 1 ', a lock releasing rope is attached. Alternatively, the connecting plate 4 of the fall prevention device 1 'located at the rearmost side is pushed forward and upward, and the fall prevention device 1' located at the rear is brought into close contact with the fall prevention device located at the front, and sequentially located at the front. The tip end portion 29 on the rear side of the connecting plate 4 of the fall prevention device 1 ′ is also pushed upward in the forward direction to release the braking and follow the vehicle.

  When a plurality of crash prevention devices 1 'are connected in close proximity in this way, in the unlikely event of an emergency such as a slip, only the fall prevention device 1' located at the rearmost position is the initial stage of the crash. May contribute to braking in the event of a crash. In addition, when the life rope is not connected to the fall prevention device 1 ′ located at the rearmost position, only the urging force of the coil spring 27 makes contact between the braking portion 25 at the tip of the lever plate 3 and the running surface 13 of the rail 11. It becomes only. In this case, if the braking force is sufficient to prevent the crash, the crash is prevented. If the braking force is insufficient for unlocking the other crash preventing device 1 ', the crash preventing device 1' connected with a life rope or the like. This prevents the crash. However, depending on the number of connected fall prevention devices 1 ′, the weight of the operator, the biasing force of the coil spring 27, the state of the rail running surface 13, etc., the braking force in this case may not be sufficient to prevent the fall. Although it is sufficient, there is a possibility of sufficient force for unlocking the other crash prevention device 1 ′, and the impact on the human body accompanying the crash prevention braking is increased, or in the worst case, the fall prevention is sufficient. There is a possibility that it cannot be done.

  That is, an object of the present invention is a fall prevention device having a link mechanism and a guide structure for the link mechanism as in the prior art, and an unintended braking part is locked or moved by an external obstacle or the like. More safety-conscious so that the crash prevention function will not be hindered, and even if multiple fall prevention devices are connected in close proximity, individual crash prevention functions will not be hindered. It is to provide a fall prevention device.

The present invention
1) A crash prevention device comprising a roller for engaging with a long rigid rail laid on a steel tower column or the like and a braking member in an emergency.
2) A main body base provided with a roller, a lever plate connected to a front portion of the main body base by a lever plate receiving shaft serving as a rotating shaft, and a front connecting plate receiver serving as a rotating shaft at the other tip portion of the lever plate A connecting plate connected by a shaft, and a guide fixed to the rear portion of the main body base connected to the connecting plate by a slider comprising a rear connecting plate receiving shaft which is a rotating shaft and a long hole which is a guide hole in the axial direction. These parts are integrated to form a link mechanism.
3) The connecting plate is provided with an annulus (trunk through-hole) for connecting a life rope or the like. In addition, a braking portion is provided at the leading end of the lever plate on the side of the lever plate receiving shaft, and in an emergency such as sliding down, the braking portion and the roller cooperate to grip the rail, and the brake for preventing the crash is performed. . In addition, the guide portion restricts movement of the connecting plate in a direction other than the sliding direction (in particular, other than the plane on which the link operates).
4) Furthermore, the tip portion of the guide portion that also serves as the fixing portion of the link mechanism is expanded to form a cover portion, and the tip portion on the rear side of the connecting plate is covered by this cover portion, and within the moving range of the connecting plate, The most important feature is that the rear end of the connecting plate does not contact an object outside the fall prevention device.

  That is, the fall prevention device of the present invention has a fall prevention function because even if there is an obstacle at the rear side and the cover plate prevents the connecting plate from being pushed forward by the rear obstacle etc. There is no inhibition. Even if a plurality of fall prevention devices are connected in close proximity, the individual fall prevention functions are not hindered. Therefore, even if a plurality of the fall prevention devices of the present invention are used in close proximity to each other, a sufficient fall prevention function can be exhibited even in the event of sliding down, so that when a high-rise building is raised or lowered It is possible to prevent the operator from falling and to ensure sufficient safety.

It is explanatory drawing seen from the side of the fall prevention apparatus of this invention. Example 1 It is explanatory drawing seen from the side of the conventional fall prevention apparatus. (Conventional example) It is explanatory drawing of the cross section of the rail for fall prevention apparatuses which concerns on this invention and a prior art example. It is explanatory drawing seen from the upper direction of the fall prevention apparatus of this invention. Example 1 It is explanatory drawing seen from the side of the fall prevention apparatus of this invention. (Example 2)

  The crash prevention device of the present invention basically includes a roller for fitting and running on a long rigid rail laid on a steel tower pillar and the like, and a crash prevention device for emergency in the same manner as in the past. It is.

  The fall prevention device of the present invention is provided with a main body base (link A) provided with a roller, a guide part (link A) fixed to the upper rear part of the main body base, and a braking part at one end. A lever plate (link through hole) for connecting the lever plate (link B) rotatably connected to the front portion above the base portion via a lever plate bearing shaft (pin a) and the life rope of the operator ) And is rotatably connected to the other tip of the lever plate via a front connecting plate receiving shaft (pin b), and a slider comprising a rear connecting plate receiving shaft and a guide hole on the guide portion ( It consists of a connecting plate (link C) slidably connected via a slider joint c). Also, the main body base and the lever plate, the connecting plate, and the guide portion above the main body base are integrated, and one fixed link (link A) and two wires for controlling operations such as running and braking of the fall prevention device A link mechanism comprising a movable link (link B, link C), two rotary joints (pin a, pin b) and one slider (slider joint c) is formed.

  Furthermore, the front end portion of the guide portion is expanded to form a cover portion that covers the rear end portion of the connecting plate within the moving range of the connecting plate. This cover portion prevents the rear end portion of the connecting plate from coming into contact with an external obstacle or the like, and the unintentional locking or movement of the connecting plate does not occur, so that the fall prevention function is not hindered. In addition, since the cover portion is provided, even if a plurality of fall prevention devices are connected close to each other, the connecting plate does not come into contact with other fall prevention devices that are close to each other, and individual fall prevention functions are not hindered.

  1 and 4 are explanatory views of the fall prevention device according to the first embodiment of the present invention, and FIG. 3 is an explanatory view of a cross section of the rail for the fall prevention device according to the present invention. The crash prevention device 1 according to the first embodiment is the same as the conventional crash prevention device in terms of the location relating to the travel of the roller 17 and the braking portion 25 and the like. As the rail 11 to which the fall prevention device 1 is attached and travels, the same rail as that for a conventional fall prevention device can be used. The rail 11 is a long, hollow, prismatic rigid rail having a rear surface attached to a structure, an opening groove 12 provided in the center of the front surface, and a running surface 13 formed on both sides thereof. Is fitted and attached to this, and travels along the rail 11.

  The fall prevention device 1 has two sets of rollers 17 rotatably mounted on the axle 16 of the lower body base 2 (lower side in FIG. 1), and a guide roller 18 rotatably mounted on the axle 16. Yes. When traveling, the fall prevention device 1 smoothly travels along the rail because the roller 17 contacts the back side of the hollow inside of the rail 11 and the rail traveling surface back 14 and the guide roller 18 contacts the opening groove 12.

  In the fall prevention device 1, a lever plate 3 is rotatably connected to the front above the main body base 2 via a lever plate receiving shaft 21, and further connected to the lever plate 3 via a front connecting plate receiving shaft 22. Are rotatably connected. The connecting plate 4 is provided with a ring portion (trunk through hole) 26 and a rear connecting plate receiving shaft 23 for connecting an operator's life rope and the like.

  A bifurcated portion (guide portion) 5 that is fixed to the main body base portion 2 and extends upward is provided on the rear side above the main body base portion 2, and a long hole (guide hole) is formed at the tip of the bifurcated portion (guide portion) 5. Guide holes) 24 are provided. In this example, the main body base 2 and the bifurcated portion (guide portion) 5 are integrated. Further, the rear connecting plate receiving shaft 23 of the connecting plate 4 and the long hole (guide hole) 24 of the bifurcated portion (guide portion) 5 are slidably engaged.

  By these connections, one fixed link (the main body base 2 and the guide portion 5), two movable links (the lever plate 3, the connecting plate 4), and two joint pins (the lever plate receiving shaft 21, the front portion connecting) A link mechanism comprising a plate bearing shaft 22) and one slider joint (rear connecting plate bearing shaft 23 and long hole (guide hole) 24) is formed.

  Further, the lever plate 3 is urged to rotate clockwise in FIG. 1 by a coil spring 27, and the braking portion 25 at the tip of the lever plate 3 is in light contact with the running surface 13 of the rail 11. A life rope is connected to the ring part (bottle rope through hole) 26 of the connecting plate 4. Here, the lever plate 3 is composed of two plate-like bodies, and the forked portion (guide portion) 5 is also constituted of two plate-like bodies so as to sandwich the connecting plate 4 and is loaded in an emergency or the like. It also plays a role of guiding so that the connecting plate 4 to be hung is restricted from moving in a direction other than the plane of the link mechanism.

  Further, the tip portion of the bifurcated portion (guide portion) 5 provided with the long hole (guide hole) 24 is enlarged to form the cover portion 6, and the rear connecting plate receiving shaft 23 of the connecting plate 4 is provided. The rear end portion 29 is covered with the cover portion 6 including the rearward movement range. By this cover part 6, even if an obstacle etc. are arranged behind the fall prevention device 1 of the present invention, the connecting plate 4 is not pushed up by the obstacle. The braking unit 25 is not released from contact with the running surface 13 of the rail 11 and the fall prevention function is not hindered.

  In this embodiment, the cover portions 6 are formed by enlarging the tip portions of the two plate-like bodies forming the bifurcated portion 5 so as to cover both side surfaces of the connecting plate 4. For preventing contact with an obstacle, it is effective to enlarge only one of the two plate-like bodies and cover only one side instead of both sides. Further, both of the two plate-like bodies may be enlarged, and a gap between the tip portions may be connected to cover not only both side surfaces but also the entire rear portion.

  In the case of the first embodiment, the long hole (guide hole) 24 is on the fixed link side and is provided on the cover portion 6 of the bifurcated portion (guide portion) 5 on the outside, so that the slider joint (guide hole 24 and The state of the rear connecting plate receiving shaft 23) can be visually confirmed from the outside, and can be easily found especially when there is a clogging of foreign matter.

  Furthermore, in this case, without obstructing the movement of the connecting plate 4 serving as a movable link from the outside, the portion of the long hole (guide hole) 24 is covered with another cover (not shown) including the rear connecting plate receiving shaft 23. It is possible to cover. If such another cover is attached, it is possible to prevent an external foreign matter or the like from acting on the long hole (guide hole) 24 to hinder the fall prevention function. Moreover, since this another cover is not a member to which a large load is applied, it may be manufactured using a transparent material so that visual confirmation from the outside is possible.

  Further, in the fall prevention device 1 of the first embodiment, a member provided with a key lock rope through hole 31 is connected above the lever plate 3. In this case, the operability of the fall prevention device can be improved by connecting the key lock rope to the key lock rope through hole 31, and the safety life can be improved by connecting the key lock rope to the safety belt of the operator. The rope is doubled.

  Next, a description will be given of an elevating work example in which safety equipment for preventing a fall having such a configuration is laid on a transmission line tower. As in the conventional example, the worker who brought the fall prevention device 1 is the bottom end of the rail 11. The roller 17 is fitted into the hollow portion of the rail 11 with the front lever plate 3 facing upward. In this case, the lever plate 3 and the connecting plate 4 are positioned outward from the opening groove 12 on the traveling surface 13 side of the rail 11 together with a part of the main body base 2. Although illustration is omitted, the operator's waist belt and the torso hole 26 provided in the connecting plate 4 of the fall prevention device 1 are connected via a life rope, and the operator follows the step bolts of the steel tower. Ascend with the fall prevention device 1. At the time of the climbing tower, the life rope pulls the connecting plate 4 forward through the trunk rope through hole 26, and therefore the lever plate 3 is also lifted forward against the bias of the coil spring 27, Since the contact with the rail 11 is released, the fall prevention device 1 is accompanied forward (in the direction of ascending tower).

  Further, when descending the tower, the operator pulls the waist, so that the connecting plate 4 can be lifted forward by the life rope so that the contact between the braking portion 25 at the tip of the lever plate 3 and the rail 11 can be released. It is possible to run the fall prevention device 1 backward (in the direction of descending tower) and to descend the tower together.

  Further, when the operator stops in the middle of raising and lowering, the life rope is slightly loosened and the urging force of the coil spring 27 is utilized to make the braking portion 25 of the lever plate 3 of the fall prevention device 1 lightly contact the rail 11 and stop. It is possible to leave it.

  In the event of an emergency such as operator slipping, first, when the life rope of the fall prevention device 1 is slackened, the connecting plate 4 and the lever plate 3 are instantly activated by the biasing force of the coil spring 27 to brake the lever plate 3. When the part 25 comes into contact with the running surface 13 of the rail 11, the fall prevention device 1 stops suddenly. Subsequently, a large impact force due to the weight of the operator, which is pulled down to the connection plate 4, is applied via the life rope, and is further amplified and propagated to the lever plate 3 connected to the link to the brake unit 25 at the tip. . Therefore, the braking unit 25 engages with the running surface 13 of the rail 11 in cooperation with the roller 17 in contact with the running back surface 14 of the rail 11, and securely fixes the fall prevention device 1 to that position of the rail 11. Prevent operator crash.

  FIG. 5 is an explanatory diagram of a crash prevention device according to a second embodiment of the present invention. Except for the guide portion 5 and the connecting plate 4 of the main body base 2 of the fall prevention device 1 ″, the fall prevention device is the same as the fall prevention device of the first embodiment, and thus the description that overlaps with the first embodiment is omitted. As in the case of the first embodiment, the same rail as that for the conventional crash prevention device can be used as the traveling rail 11 to which the crash prevention device 1 ″ is attached.

  The fall prevention device 1 ″ has two sets of rollers 17 rotatably mounted on the axle 16 of the lower body base 2 (lower side in FIG. 5), and a guide roller 18 mounted on the axle 16 above the main body base. A lever plate 3 is rotatably connected to the front above 2 via a lever plate receiving shaft 21, and a connecting plate 4 is rotatably connected to the lever plate 3 via a front connecting plate receiving shaft 22. The connecting plate 4 is provided with a ring portion (trunk through hole) 26 and a long hole (guide hole) 24 for connecting a life rope such as an operator.

  Further, a bifurcated portion (guide portion) 5 that is fixed to the main body base 2 and extends upward is provided behind the main body base 2, and a rear connecting plate receiving shaft 23 is provided at the tip thereof. Further, the rear connecting plate receiving shaft 23 of the bifurcated portion (guide portion) 5 and the long hole (guide hole) 24 of the connecting plate 4 are slidably engaged.

  By these connections, one fixed link (the main body base 2 and the guide portion 5), two movable links (the lever plate 3, the connecting plate 4), and two joint pins (the lever plate receiving shaft 21, the front portion connecting) A link mechanism comprising a plate bearing shaft 22) and one slider joint (rear connecting plate bearing shaft 23 and long hole (guide hole) 24) is formed.

  In addition, the lever plate 3 is urged to rotate clockwise in FIG. 5 by the coil spring 27, and the braking portion 25 at the tip of the lever plate 3 is in light contact with the running surface 13 of the rail 11. A life rope is connected to the ring part (bottle rope through hole) 26 of the connecting plate 4. Here, the lever plate 3 is composed of two plate-like bodies, and the forked portion (guide portion) 5 is also constituted of two plate-like bodies so as to sandwich the connecting plate 4 and is loaded in an emergency or the like. It also plays a role of guiding so that the connecting plate 4 to be hung is restricted from moving in a direction other than the plane of the link mechanism.

  Further, the front end portion where the rear connecting plate receiving shaft 23 of the bifurcated portion (guide portion) 5 is provided is enlarged to form a cover portion 6, and a long hole (guide hole) 24 of the connecting plate 4 is provided. The rear end portion 29 is covered with the cover portion 6 including the rearward movement range. Even if an obstacle is disposed on the rear side of the fall prevention device according to the present invention, the cover part 6 does not push up the connecting plate 4 due to the obstacle. Therefore, the braking part of the lever board 3 is not intended. 25 is released from contact with the running surface 13 of the rail 11, and the fall prevention function is not hindered.

  In this embodiment, similarly to the first embodiment, the cover portions 6 are formed by enlarging the tip portions of the two plate-like bodies forming the bifurcated portion 5 and cover both side surfaces of the connecting plate 4. Yes. For preventing contact with an obstacle, it is effective to enlarge only one of the two plate-like bodies and cover only one side instead of both sides. Further, both of the two plate-like bodies may be enlarged, and a gap between the tip portions may be connected to cover not only both side surfaces but also the entire rear portion.

  As described above, the crash prevention device of the present invention is intended to start the braking mechanism more reliably, and can be used as a general purpose, as long as the rail for preventing crashes can be laid, various high-rise buildings, bridges, Applicable to wide areas on elevated roads, theme park facilities and others.

DESCRIPTION OF SYMBOLS 1, 1 ', 1 "Fall prevention apparatus 2 Main body base part 3 Lever board 4 Connection board 5 Forked part, Guide part 6 Cover part 11 Rail 12 Opening groove 13 Running surface 14 Running back surface 16 Axle 17 Roller 18 Guide roller 21 Lever board Receiving shaft 22 Front connecting plate receiving shaft 23 Rear connecting plate receiving shaft 24 Long hole, guide hole 25 Brake portion 26 Ring portion, trunk rope through hole 27 Coil spring 28 Spring receiving shaft 29 (rear side) tip 31 Key lock rope Through hole

Claims (2)

  A main body base provided with a roller that fits and runs on a long rigid rail laid on a high-rise building including a steel tower pillar, a guide portion fixed to the main body base, and a lever plate on the main body base A lever plate connected rotatably through a receiving shaft and a ring portion for connecting a life rope are provided, and connected to the lever plate through a front connecting plate receiving shaft so as to be rotatable, It comprises a connecting plate slidably connected to a guide portion via a slider joint, and includes a braking portion at the tip of the lever plate on the lever plate receiving shaft side, and the rail is provided by the cooperation of the braking portion and the roller. A fall prevention device that grips and brakes the cover, and a cover portion that covers a tip portion of the connecting plate on a side where the slider joint is provided within a moving range of the connecting plate is provided at a tip portion of the guide portion. It is characterized by being provided That fall protection equipment.   2. The fall prevention device according to claim 1, wherein the slider joint is formed by slidably engaging a rear connecting plate receiving shaft provided in the connecting plate and a long hole provided in the guide portion. .

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