JPH08199802A - Lifeline winding equipment of gondola equipment - Google Patents

Abstract

PURPOSE: To wind the life line suspending below a gondola, to safely support a working person when the suspending rope is cut, and to dispense with the troublesome operations in elevating/lowering the gondola. CONSTITUTION: A winding device is provided with a locking mechanism 60 where a winding reel 54 is provided on a rotary shaft 52A of a gear motor 52 through a torque limiter 55, a locking pawl 62 is engaged with a ratchet 61 to stop the rotation of the winding reel 54 when the rotational speed in the delivering direction of the winding reel 54 is above the delivering speed associated with the descending of the gondola, and a connecting piece to be connected through a working person and a safety belt. The winding equipment is tightened to a fitting base part 41 of the gondola so as to wind the life line 5 by a safety bolt 90 whose connecting strength in the vertical direction is below the preset strength of the life line 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gondola device in which a gondola is suspended from an upper part of a building via a suspension rope member so that the gondola can be vertically driven, and a lifeline is suspended along an elevation path of the gondola. Relates to a lifeline winding device for a gondola device, which is provided in the gondola for winding the lifeline.

[0002]

2. Description of the Related Art Conventionally, when performing work such as construction or repair of an outer wall surface of a building such as a building, a gondola device that supports a gondola that can be carried by an operator so that the gondola can be raised and lowered along the wall surface. It is often used.

In such a gondola device, the gondola is equipped with a lifting drive mechanism so that the gondola moves up and down along a hanging rope suspended from the upper edge of the building, or is fixed to the gondola. There is a configuration in which the hoisting rope is hoisted and unwound to raise and lower the gondola by a lifting drive mechanism provided on the rooftop of the building.Either of these constructions, the gondola is boarded in the event of an accident such as cutting of the hoisting rope. To ensure the safety of workers
A lifeline with a length corresponding to the entire range of the gondola's elevation from the top of the building is hung down along the gondola's ascent and descent path, and this lifeline and the worker are connected via a safety belt. There is. As a result, even if the hanging rope is cut and the gondola falls, the worker is prevented from falling by being supported by the lifeline, and safety is ensured. The safety belt and the lifeline are connected via an engagement mechanism that can be engaged or disengaged by an operator's operation, and the operator releases the engagement of the engaging mechanism when the gondola is raised or lowered. It is like this.

[0004]

By the way, as the range of elevation of the gondola increases with the increase in the height of the building, the length of the lifeline naturally becomes longer, which causes the lifeline to sway and twist, or the outer wall of the building. It is desirable to treat the lifeline below the gondola because problems such as damage to windows and windows will occur. However, if the gondola is equipped with a take-up device for taking up the lifeline, if the suspension rope is cut, not only the worker but also the gondola will be in a state of being suspended by the take-up device on the lifeline, It is difficult to support the gondola because the strength of the lifeline itself and the strength of the joint with the building are set to support the worker.

Further, in the above-described conventional structure, the operator must release the engagement with the lifeline each time the gondola is moved up and down, and this release operation is troublesome.

The present invention has been made in view of the above problems, and it is possible to wind a lifeline that hangs down the gondola, and to safely support only the operator when the hanging rope is cut. In addition, it is an object of the present invention to provide a lifeline take-up device for a gondola device that does not require a troublesome operation when moving up and down the gondola.

[0007]

A lifeline winding device for a gondola device according to the present invention that achieves the above-mentioned object is such that the gondola is suspended from the upper part of a building through a suspending rope member so that it can be driven up and down. In a gondola device in which a lifeline hangs down along an ascending / descending path of a gondola, a reel member is provided on a rotation shaft of a rotation driving means via a rotation force regulation unit that does not transmit a rotation force equal to or more than a specified rotation force, and A feed-out restricting unit that stops rotation at a rotation speed in the feed-out direction of the reel member that is higher than or equal to the feed-out rotation speed that accompanies the lowering of the gondola, and a connecting member that is connected to an operator on the gondola through a safety belt. , A winding device equipped with, the vertical connection strength of the life line to the gondola to wind the life line. And it is provided through the constant intensity following coupling means.

[0008]

In the lifeline take-up device for a gondola device according to the present invention, the take-up device takes up the lifeline with a predetermined force regulated by the rotational force regulating means when the gondola is raised, and the take-up device is taken up when the gondola is lowered. The lifeline is extended against the prescribed force of the rotational force regulation means, and the lifeline is not always loosened.

When the gondola falls due to cutting of the hanging rope member or the like, the lifeline is pulled out from the winding device that falls with the gondola at a value equal to or more than the specified value of the payout restricting means, and the payout restricting means restricts the rotation of the reel member. To prevent the take-up device from falling. As a result, the load of the gondola acts on the coupling means to release the coupling, and the gondola separates and falls off from the winding device.Therefore, the load of the gondola does not act on the lifeline and the coupling member of the winding device is removed. Workers connected via safety belts are supported by this lifeline.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of a gondola device including an embodiment of a lifeline winding device for a gondola device according to the present invention.

In this gondola device, a gondola 4 is suspended by a suspending wire rope 3 as a suspending rope member suspended from a projecting beam 2 disposed at the upper edge of a building 1, and the end thereof is also suspended. A lifeline 5 whose part is fixed to the building 1 is hung down via another projecting beam 2 '. The hanging wire rope 3 and the lifeline 5 are set to have a length over the entire lifting range of the gondola 4.

The gondola 4 has its hanging wire rope 3
The winding device 40 is provided at a position corresponding to, and the winding device 50, which is a lifeline winding device, is provided at the outer upper edge portion corresponding to the lifeline 5.

The hoisting device 40 is a so-called endless winder. The hoisting wire rope 3 is wound around a drive sheave, not shown, which is internally provided, and is vertically pierced and hung on the drive sheave. The wire rope 3 is brought into an engagement state by a frictional force, and the frictional engagement position of the drive sheave with respect to the hanging wire rope 3 is displaced by being rotationally driven by a drive means provided with a drive sheave. There is. This winding device 4
By engaging 0 with the hanging wire rope 3, the gondola 4 is held by the hanging wire rope 3, and the gondola 4 moves up and down along the hanging wire rope 3 by its driving. That is, the gondola 4 is moved up and down along the suspended wire rope 3 thus suspended.

The winding device 50 has both sides of the base 51A as shown in FIG. 2 which is a longitudinal sectional view corresponding to the AA section of FIG. 1 and FIG. 3 which is a BB sectional view of FIG. U-shaped frame 51 in which supporting arms 51B and 51C are erected at the ends
A gear motor 52 as a rotation driving means is attached to one arm 51B with its rotation shaft 52A facing inward, and a support shaft 53 is attached to a facing portion of the other arm 51C. Rotating shaft 52A and support shaft 53
The take-up reel 54, which is a reel member, is supported by.

The take-up reel 54 has one side plate 54.
A is supported by the rotary shaft 52A of the gear motor 52 via a torque limiter 55 as a rotational force restricting means, and the other side plate 54B is supported by the support shaft 53 via a slide bearing.

The torque limiter 55 is a gear motor 52.
A rotary flange member 55C is externally inserted to the outer periphery of a cylindrical boss member 55A fitted with the rotary shaft 52A with a friction plate 55B sandwiched therebetween, and the rotational force of the boss member 55A is transmitted through the friction force with the friction plate 55B. The rotational force transmitted from the boss member 55A to the rotational flange member 55C is defined by the frictional force with the friction plate 55B, and the boss member 55A has a large rotational force. Even if the rotary flange member 55C is rotationally driven by, the rotational flange member 55C can only be rotationally driven by a rotational force equal to or less than a value specified by the frictional force. That is,
When a rotational resistance of a predetermined value or more acts on the rotary flange member 55C, the rotary flange member 55C is moved to the boss member 55A.
Idling (or rotating flange member 55C
Is rotated in a direction opposite to that of the boss member 55A with a rotational force of a predetermined value or more). The specified rotational force of the rotary flange member 55A is the same as the adjustment nut 55.
It can be adjusted by changing the pressure contact force between the friction plate 55B and the rotary flange member 55C by D.

The boss member 55A of the torque limiter 55
Is fitted and mounted on the rotary shaft 52A of the gear motor 52, and the rotary flange member 55C is mounted on the take-up reel 54.
Of the take-up reel 5
The gear No. 4 is rotationally driven by the gear motor 52, but is not rotationally driven by the rotational force defined by the torque limiter 55 or more.

Further, in the winding device 50, the outer surface of the side plate 54B of the winding reel 54 on the side of the support shaft 53 and the frame 51.
A lock mechanism 60 as a feed-out restricting means is provided between the inner surface of the arm 51C and the arm 51C.

The lock mechanism 60 is composed of a ratchet wheel 61 having a predetermined diameter, which is fastened to the outer surface of the side plate 54B of the take-up reel 54, and a locking claw 62 provided on the inner surface of the arm 51C of the frame 51. There is.

The ratchet wheel 61 is a thin disk having an outer peripheral surface with a gentle tooth surface on the front side in the winding direction of the winding device 50 and a steep surface on the opposite side facing the center of rotation. A plurality of teeth 61A are provided and formed, and the center of the teeth 61A is aligned with the center of the take-up reel 54 and is fastened to the side plate 54B.

The locking claw 62 has a substantially crescent-shaped planar shape, and one end of the locking claw 62 is cut flat.
The frame 5 is formed to have a thickness slightly larger than that of the ratchet wheel 61 and has a shape in which the other end is formed as a claw portion 62B having an acute angle.
The first arm 51C is swingably supported by a stud bolt 63 at the substantially center thereof on the inner side surface of the first arm 51C. The swing center (position of the stud bolt 63) is located directly below the support shaft 53, and the swing is performed in the same plane as the ratchet wheel 61. In addition, a coil is provided between a center of the swing and a substantially central portion of the operation end 62A, and an upper end of a stud bolt 64 which is erected on the inner side surface of the arm 51C of the frame 51 adjacent to the upper side of the stud bolt 63. A spring 65 is stretched, and the operating end 62A of the locking claw 62 is elastically restored by the coil spring 65.
Is urged to swing so that the operation end 62A is moved to the side of the ratchet 6
The outer peripheral surface of No. 1 is abutted. With such a configuration, when the ratchet wheel 61 rotates, the locking claw 62 swings along the unevenness of the outer periphery of the ratchet wheel 61 (the teeth 61A and the valleys between them) and the other end of the locking claw 62 swings. The portion 62B separates from and comes into contact with the ratchet wheel 61, but more specifically, rotation of the take-up reel 54 by winding or unwinding of the lifeline 5 with respect to the winding device 50 as the gondola 4 moves up and down (that is, rotation of the ratchet wheel 61). ) At the speed, even if the operating end 62A corresponds to the tooth 61A (that is, even when the pawl portion 62B is closest to the pawl wheel 61), the pawl portion 62B is prevented from rotating in any direction. The size of each part and the urging force of the coil spring 65 are set so that the tip has a slight gap with the maximum outer peripheral surface of the ratchet wheel 61 (that is, the top surface of the tooth 61A) and does not interfere.

The frame 51 is connected as a connecting member for connecting the safety belt 7 of the operator who rides on the gondola 4 to a position not interfering with the take-up reel 54 diagonally below the take-up reel 54 in FIG. A metal fitting 80 is provided. As shown in FIG. 4, which is a plan view corresponding to the CC sectional view of FIG. 3, the connecting fitting 80 has a mounting tube 81 having a length that can be interposed between the side plates 51B and 51C and a coupling hole 82A. The formed connecting plate 82 is fixed, and the mounting cylinder 81 is mounted between the left and right side plates 51B and 51C and is mounted by the mounting bolts 83 inserted into the mounting cylinder 81 from the outside of the side plate 51B. 82 is swingable up and down.

In the winding device 50 having the above-described structure, the four corners of the base 51A of the frame 51 are attached to the upper surface of the mounting base portion 41 which is horizontally fixed to the upper outside of the gondola 4.
It is fastened by a safety bolt 90 as a connecting means, and is attached to the gondola 4 by this.

As shown in FIG. 6, the safety bolt 90 has a notch 91 formed under the neck of a bolt head made of plastic, for example, and is cut by a predetermined pulling force. It is set so as to break from the notch 91. The axial direction of the take-up device 50 is screwed to the mounting base portion 41 so that the take-up device 50 is fastened to the gondola 4 with the vertical direction being the same as the vertical direction of the gondola. The breaking tensile force of the safety bolt 90 is the strength of the lifeline 5 and the joint strength between the lifeline 5 and the building 1, which is the sum of the breaking tensile forces of all the safety bolts 90 used for the joint. On the other hand, it is set within a range in which it can withstand a sufficient safety factor and does not hinder the fixing of the winding device 50 to the gondola 4 in normal use.

The winding device 50 constructed as described above is
Although the take-up reel 54 is rotationally driven by the gear motor 52 to wind up the lifeline 5, when the take-up resistance becomes equal to or greater than the rotational force specified by the torque limiter 55, the torque limiter 55 causes the gear motor 52 to rotate. Regardless of the rotation of the shaft (regardless of the rotation of the boss member 55A of the torque limiter 55), the take-up reel 84 does not rotate and winding is not performed. At this time, the lifeline 5 is pulled by a predetermined force, There is no slack. When the lifeline 5 is pulled backward against the pulling force from this state, the take-up reel 84 relatively rotates in the direction opposite to the rotation direction of the rotation shaft of the gear motor 52, and the lifeline 5 is pulled out. In other words, this allows the lifeline 5 to be wound without slack in a state in which a predetermined tension is generated, and can be pulled out in a state in which a predetermined tension is generated, and the lifeline 5 is wound in accordance with the elevation of the gondola 4. Alternatively, it acts to keep the lifeline 5 in a slack state by being extended. During this normal operation, the lock mechanism 60 does not operate at all.

In the event that the suspension rope 3 is cut and the gondola 4 falls, the lock mechanism 60 operates and operates as follows.

That is, as the gondola 4 falls, the winding device 50 also drops. At that time, since the lifeline 5 is strongly pulled, the lifeline 5 is drawn out from the winding device 50 by the action of the torque limiter 55. The take-up reel 54 will rotate in the pay-out direction at a higher speed than the normal rotation (rotation at the time of winding or paying out the lifeline 5 as the gondola 4 moves up and down). As a result, the operating end 62A of the locking pawl 62 is strongly kicked by the teeth 61A of the ratchet wheel 61 of the lock mechanism 60, and the swing range thereof becomes larger than the normal time, and the pawl portion 62B falls within the interference range with the ratchet wheel 61. As a result, the claw portion 62B engages with the teeth 61A of the ratchet wheel 61 as shown in FIG. With this, the ratchet wheel 61
(That is, the take-up reel 54) is prevented from rotating, and the lifeline 5 is stopped.

When the extension of the lifeline 5 is stopped, a safety bolt 90 for connecting the winding device 50 and the gondola 4 together.
The load of the gondola 4 acts on the safety bolt 90, which breaks the safety bolt 90. When the safety bolt 90 is broken, the gondola 4 is separated from the winding device 50 and falls, and the winding device 5
Only 0 is suspended in the lifeline 5.
An operator who has boarded the gondola 4 connected to the winding device 50 via the safety belt 7 can be supported by the lifeline 5 via the winding device 50 and escape from falling.

From the point of view of function, the gear motor 52 of the winding device 50 operates when the gondola 4 is driven upward.
Although it may be only rotationally driven in synchronization with the operation of 0, it may be rotationally driven at all times, and in that case, tension can be constantly applied to the lifeline 5 to prevent loosening. Is more preferable.

According to the above structure, the lifeline 5 does not hang below the gondola 4, and the hanging lifeline 5 does not sway or twist due to wind or damage the outer wall surface or window of the building. In addition, even if the hanging wire rope 3 is cut, the weight of the gondola 4 acts on the lifeline 5 because the winding device 50 separates from the gondola 4, and the lifeline 5 is dangerous. There is no such thing.

In the above embodiment, the safety bolt 90 as a connecting means is arranged parallel (vertical) to the up-and-down direction of the gondola 4 so that the winding device 50 is connected to the gondola 4. The configuration is not limited to this. For example, the winding device 50 is coupled to the gondola 4 by a safety bolt whose axial direction is orthogonal to the vertical direction of the gondola 4, and the safety bolt is sheared when the gondola 4 falls. It may be configured so that it can be appropriately changed. Further, the lock mechanism 60 as the feeding-out restricting means is provided with the ratchet wheel 6.
Although it is configured by 1 and the locking claw 62, it is not limited to this and may be any other configuration.

[0032]

As described above, in the lifeline winding device of the gondola device according to the present invention, when the gondola is raised, the winding device winds the lifeline with a predetermined force regulated by the rotation force regulating means, When the gondola descends, the lifeline is drawn out from the winding device by resisting the specified force of the rotational force restricting means, and the lifeline is accommodated in a state where the slack does not always occur and does not hang down below the gondola.
As a result, it is possible to prevent the hanging lifeline from being swayed and twisted by the wind or from damaging the outer wall surface or the window of the building.

When the gondola falls due to the cutting of the hanging rope member or the like, the feeding-out regulating means regulates the rotation of the reel member to stop the feeding of the lifeline to drop the winding device. At the same time as blocking, the coupling means releases the coupling and only the gondola separates and falls off from the winding device. For this reason, the load of the gondola does not act on the lifeline to avoid damage, and the worker connected to the coupling member of the winding device via the safety belt is supported by the lifeline. It is possible to ensure safety.

Further, since the coupling fitting provided on the winding device and the worker are connected through the safety belt, the engagement between the safety belt and the lifeline is released each time the gondola is driven up and down. No need for troublesome operations.

[Brief description of drawings]

FIG. 1 is a side view of a gondola device to which an embodiment of a lifeline winding device for a gondola device according to the present invention is applied.

FIG. 2 is a cross-sectional view of the winding device corresponding to the AA cross section of FIG.

3 is a sectional view taken along line BB of FIG.

FIG. 4 is a plan view of a connection fitting corresponding to the CC cross section of FIG. 3;

FIG. 5 is an external view of a safety bolt.

FIG. 6 is a partial enlarged view showing an operating state of the lock mechanism.

[Explanation of symbols]

 1 Building 3 Suspended Wire Rope (Suspended Rope Member) 4 Gondola 5 Lifeline 7 Safety Belt 50 Winding Device 52 Gear Motor (Rotation Driving Means) 52A Rotation Shaft 54 Winding Reel (Reel Member) 55 Torque Limiter (Rotation Force Regulation) Means) 60 Feeding-out restricting means (lock mechanism) 80 Connection fittings (connection members) 90 Safety bolts (coupling means)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B66D 5/32

Claims (1)

[Claims] 1. A gondola device in which a gondola is suspended from an upper part of a building via a suspending rope member so as to be capable of ascending / descending, and a lifeline is suspended along an ascending / descending path of the gondola. The reel member is provided on the rotating shaft of the rotating member through a rotating force regulating means that does not transmit a rotating force equal to or more than a specified rotating force, and the rotating speed of the reel member in the unwinding direction is not less than the unwinding rotating speed accompanying the lowering of the gondola. A feed-out restricting means for stopping the rotation, and a connecting member which is connected to an operator who rides on the gondola via a safety belt,
A winding device provided with a gondola, wherein the gondola is provided with a coupling means whose vertical coupling strength is less than a preset strength of the lifeline so as to wind up the lifeline. Equipment lifeline winding device.