JP2016050047A - Safety belt hook device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To descend into a pit and return to a landing from the pit safely by wearing a safety belt in inspection work of an elevator, for example in the inspection work in the pit.SOLUTION: A safety belt hook device in an embodiment of the disclosed invention is the safety belt hook device for engaging a lifeline of a safety belt worn by an operator performing inspection work in a hoistway of an elevator. The safety belt hook device includes: a storage case 31 attached to three door sills constituting an elevator doorway; and a rotatable safety belt hook 34 which is stored in the storage case 31 and has a hook part 36 which can be engaged with a tip end of the lifeline and is exposed from the storage case 31 by rotating at a prescribed angle.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to an elevator safety belt hook device.

  In the elevator inspection, an operator rides on the car and checks the equipment on the car and the equipment installed in the middle of the hoistway, and the worker descends to the pit at the bottom of the hoistway. And inspecting various devices installed there.

  During inspection work, when an operator gets on the car from the landing, it is obliged to wear a safety belt to prevent falling. A lifeline is connected to the safety belt, and the worker hooks the hook at the top of this lifeline on the safety belt hook provided at the top of the car before moving onto the car. It is necessary.

  Conventionally, the safety belt hook used for inspection work on the car is installed at the top of the car, and if the safety belt hook cannot be installed at a convenient position on the car, the three on the landing side It has been proposed to install a safety belt hook on the frame (see, for example, Patent Document 1).

  On the other hand, in the inspection work at the pit at the bottom of the hoistway, the operator lowers the ladder to the bit from the landing on the lowest floor, and travels down this ladder to the pit. From the bottom floor to the pit floor is often several meters high, but in general there are often no safety belt hooks, so we have transferred from the landing to the ladder without wearing a safety belt Is the current situation. When the inspection work in the pit is completed, the worker climbs the ladder and returns to the landing.

JP 2011-190076 A

However, the inspection work in the pit is most dangerous when the worker changes from the landing to the ladder and from the ladder to the landing.
Workers must move from the landing to the ladder by putting their feet and hands on the rung of the ladder in a hoistway. Because there is no safety belt hook on the landing side and you can not use the safety belt, there was a risk of falling into the pit, breaking the balance of the body when you stepped on the ladder rung .

  In addition, in order to complete the inspection work in the pit and return to the landing, the worker must climb a ladder. At this time, there is a risk of falling out of balance and falling into the pit when an operator tries to move to the landing with the other foot on the landing side while climbing the ladder and leaving one foot on the ladder. is there.

  The present invention has been made in view of the above-described problems of the prior art, and can be used to safely get off to a pit by wearing a safety belt during an inspection operation of an elevator, for example, an inspection operation in a pit. An object of the present invention is to provide an elevator safety belt hook device that can return to a landing from a pit.

  In order to achieve the above object, an embodiment of the present invention provides a safety belt hook device for locking a lifeline of a safety belt worn by an operator who performs inspection work in an elevator hoistway. A storage case that is attached to a three-way frame that constitutes a rotating safety belt hook that is stored in the storage case and that can be hooked to the tip of the lifeline by rotating a predetermined angle to expose the lifeline from the storage case Are provided.

It is a figure which shows the outline | summary of the elevator to which the safety belt | hook hook apparatus of the elevator by one Embodiment of this invention is applied. FIG. 2A shows a safety belt hook device for an elevator according to an embodiment of the present invention, FIG. 2A is a perspective view showing the safety belt hook device seen from the front side of the three-sided frame, and FIG. 2A is safety seen from the back side of the three-sided frame. It is a perspective view which shows a belt | hook hook apparatus. It is a perspective view which shows the state by which the safety belt hook apparatus of the elevator of FIG. 2 was unlocked from the back side of a three-way frame. FIG. 4A shows a safety belt hook device for an elevator according to an embodiment of the present invention, FIG. 4A is a perspective view showing the safety belt hook device in a usable state from the front side of the three-side frame, and FIG. It is a perspective view which shows the safety belt | hook hook apparatus seen from the back side. It is a perspective view which shows the state which hooked the tool of the lifeline of the safety belt on the safety belt hook of the safety belt hook apparatus of FIG. It is a flowchart of the work in the pit of the worker who uses a safety belt hook device.

Hereinafter, an embodiment of an elevator safety belt hook device according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a diagram showing an overview of an elevator to which an elevator safety belt hook device according to the present invention is applied. In FIG.1 (b) which shows the hoistway side, the reference number 10 shows the elevator car and the reference number 11 has shown the counterweight.

  Sheaves 14 a and 14 b are provided at the lower part of the car 10, and sheaves 16 a and 16 b are provided at the upper part of the counterweight 11. The car 10 and the counterweight 11 are suspended by the main rope 12 through these sheaves. Reference numeral 15 denotes a hoisting machine, and reference numeral 24 denotes a control panel.

Here, Fig.1 (a) shows the landing side of an elevator. In each elevator hall, an elevator opening is constituted by a three-way frame composed of vertical frames 20 and 21 and a horizontal frame 22. Reference numeral 23 indicates a hall indicator box.
The landing on the lowest floor is configured as follows so that an operator can wear a safety belt and go down to the pit 18 or return to the landing after completion of the inspection at the pit 18 at the bottom of the hoistway. The safety belt hook device 30 is provided on the vertical frame 21 of the three-way frame.

  Here, FIG. 2 is a diagram showing the safety belt hook device 30 according to the present embodiment. FIG. 2A is a view of the safety belt hook device 30 attached to the three-way frame of the landing as seen from the front side, and FIG. 2B is a view as seen from the back side. The safety belt hook device 30 includes a box-shaped storage case 31, and a rotary safety belt hook 34 is stored in the storage case 31.

  The safety belt hook 34 according to this embodiment is a hook having a substantially D-shaped ring shape in which a straight flat plate portion 35 and a curved hook portion 36 form an integral structure.

  As shown in FIG. 2 (a), when the flat plate portion 35 is visible on the front side, the hook portion 36 is stored inside the storage case 31 and hidden as shown in FIG. 2 (b). It is in. The hook portion 36 is accommodated inside the storage case 31 in this manner except when the safety belt is used for the inspection work of the elevator.

  As shown in FIG. 2B, a boss portion 37 is formed on the flat plate portion 35 of the safety belt hook 34, and a shaft 38 is provided on the boss portion 37. The safety belt hook 34 is rotatably supported on the case 31 via the shaft 38.

  In addition, the hook portion 36 is formed with a notch groove 40 that is cut at a right angle to the longitudinal direction. The notch groove 40 is a groove used to lock the safety belt hook 34 so as not to rotate, and a lock claw 41 attached to the cylinder lock 32 can be engaged therewith.

  As shown in FIG. 3, when a key (not shown) is inserted into the cylinder lock 32 and turned 90 °, the lock claw 41 also turns 90 °, and the lock claw 41 is removed from the notch groove 40 so that the safety belt hook 34 is locked. It can be canceled. On the contrary, when the key is inserted into the cylinder lock 32 and turned 90 ° in the reverse direction, the safety belt hook 34 can be locked by inserting the lock claw 41 into the notch groove 40.

  In this embodiment, a limit switch 42 is disposed in the vicinity of the cylinder lock 32. When the lock claw 41 is removed from the notch groove 40 and the safety belt hook 34 is unlocked, the contact 42a of the limit switch 42 is pushed, and an ON signal is transmitted to the control panel 24 of the elevator. At this time, in the control panel 24, the operation motor of the elevator is switched from the normal operation to the inspection mode. This inspection mode is an operation mode in which the car is moved up and down at a speed slower than the normal operation in accordance with the manual operation operation of the maintenance staff.

  On the contrary, when the safety belt hook 34 is locked by the lock claw 41, the contact 42a of the limit switch 42 is restored, and an off signal is transmitted to the control panel 24 of the elevator. As a result, the inspection mode is switched to the normal operation mode.

The elevator safety belt hook device according to the present embodiment is configured as described above. Next, its operation and effects will be described.
FIG. 6 is a flowchart showing the work contents of the worker in the inspection work at the pit 18. In FIG. 6, steps S10 to S20 on the left side show each operation until the worker gets off the pit 18 from the landing on the lowest floor, and returns to the landing after the completion of the inspection work from step S21 on the right side. Each operation is shown. Hereinafter, the function and effect of the safety belt hook device 30 will be described in relation to the operation of the worker who goes down to the pit 18 and performs the inspection.

  First, when the car 10 is stopped at the lowest floor, the worker cannot get off to the pit 18, so the car 10 is stopped at a floor higher than the lowest floor (step S <b> 10).

  In FIG. 2, in the safety belt hook device 30 installed in the three-way frame, the safety belt hook 34 is in an unusable state during normal operation of the elevator as shown in FIG. 2 (a). It is locked.

  Therefore, the operator unlocks the cylinder lock 32 of the safety belt hook device 30 with a key (not shown), and removes the lock claw 41 from the notch groove 40 of the safety belt hook 34 as shown in FIG. The locking of the belt hook 34 is released (step S11).

  At this time, the contact 42a of the limit switch 42 is pushed by the lock claw 41 and an ON signal is transmitted to the elevator control panel 24. As a result, the operation mode of the elevator is switched to the inspection mode (step S12).

  Since the safety belt hook 34 is in a rotatable state by being unlocked, the operator rotates the safety belt hook 34 by 180 °. As a result, as shown in FIG. 4A, the hook portion 36 of the safety belt hook 34 comes out and becomes ready for use (step S13).

  Next, after the operator opens the landing door (step S14), as shown in FIG. 5, the hanging tool 50 at the tip of the lifeline of the safety belt worn is attached to the hook portion 36 of the safety belt hook 34. When it is multiplied (step S15), the safety band is ready.

  Next, in order to get off from the landing to the pit 18, the worker prepares to hang up a ladder (step S16). In this work of hanging the ladder, the worker may stand forward and bend toward the pit 18 while standing on the edge of the landing, but since the safety belt is worn, the worker can safely fall without falling into the pit 18. Work can be done.

  If the ladder can be installed, the worker transfers to the ladder (step S17). At this time, when the worker puts the first step on the rung of the ladder, the worker may be in a posture to lean out from the landing into the hoistway, but the lifeline of the safety belt is hung on the safety belt hook 34. Therefore, it is possible to prevent a fall when the balance is lost.

  The worker changes to the ladder and stabilizes the posture, and then removes the lifeline hook 50 from the safety belt hook 34 (step S18). This is because a lifeline is not always necessary because the posture is stable on the ladder. Thereafter, the worker closes the landing door so that the third person does not fall into the pit 18 (step S19), then travels down the ladder to the pit 18 (step S20), and performs predetermined inspection work at the pit 18. Will do.

  When the inspection work at the pit 18 is finished, first, the landing door is opened (step S21), and the worker starts to climb the ladder to return to the landing. When the worker reaches the safety belt hook device 30 in the three-way frame of the landing, the worker again hangs the lifeline hook 50 on the hook portion 36 as shown in FIG. 5 (step S22).

  There is no problem because the posture is stable while the worker is climbing the ladder, but when coming to the landing one step further, the balance is lost with the posture with one foot on the edge of the landing, You may slip your foot. In this embodiment, since the lifeline of the safety belt is connected to the safety belt hook 34 at this time, the operator can prevent falling to the pit 18 even if the balance is lost and the foot is slipped.

  In this way, after the worker has safely moved from the ladder to the landing (step S23), the ladder is pulled up and cleaned from the pit 18 (step S24), and the landing door is closed (step S25). Thereafter, the worker removes the safety belt lifeline hook 50 from the safety belt hook 34 and removes the safety belt (step S26).

  Since the safety belt hook device 30 is not used until the next inspection, the safety belt hook 34 that has appeared in the table as shown in FIG. 4 (a) is rotated by 180 degrees, as shown in FIG. 2 (a). In addition, the hook portion 36 of the safety belt hook 34 is housed in the case 31 so that it cannot be used (step S27).

  By storing the safety belt hook 34 in this manner, the safety belt hook 34 exposed from the surface does not get in the way of passengers, and the appearance of the design of the three-way frame of the hall is not impaired.

  In the present embodiment, the safety belt hook 34 can be locked. A key (not shown) is inserted into the cylinder lock 32, and the lock claw 41 is inserted into the notch groove 40 of the safety belt hook 24 as shown in FIG. When engaged, the safety belt hook 34 is locked so as not to rotate (step S28). In this way, since the safety belt hook device 30 can be locked when not in use, it is possible to prevent a third person from accidentally damaging the safety belt hook 34 by turning it. Can do.

  Further, when the safety belt hook 34 is locked, the contact 42a of the limit switch 42 that has been pushed by the lock claw 41 is restored to its original state. As a result of the limit switch 42 being turned off, the operation mode of the elevator is checked. The mode is switched to the normal operation mode (step S29). Thereafter, the elevator returns to normal operation in response to the car call.

  As described above, according to the present embodiment, the safety belt hook device 30 capable of storing the rotary safety belt hook 34 is provided in the three-way frame of the landing on the lowermost floor. At the time of work, the lifeline of the safety belt can be connected to the safety belt hook 34 to safely get down to the pit, and after the inspection is completed, it is possible to return safely to the landing.

  The above is an embodiment in which the safety belt hook device 30 is provided in the three-way frame of the landing on the lowest floor, but it is provided in the three-way frame of the landing on the other floor and is worn for inspection work on the car 10. You may be allowed to connect a safety belt.

  The elevator safety belt hook device according to the present invention has been described with reference to the preferred embodiments. However, these embodiments are given as examples and are not intended to limit the scope of the invention. Of course, the novel apparatus, method and system described in the specification can be implemented in various forms, and various omissions, substitutions and changes can be made without departing from the spirit of the present invention. is there. The claims and their equivalents are intended to cover the embodiments or improvements thereof within the spirit of the invention.

10 ... Riding car, 11 ... Counterweight, 12 ... Main rope, 15 ... Hoisting machine, 18 ... Pit, 20 ... Vertical frame, 21 ... Vertical frame, 22 ... Horizontal frame, 23 ... Hall indicator box, 24 ... Control panel 30 ... Safety belt hook device, 31 ... Storage case, 32 ... Cylinder lock, 34 ... Safety belt hook, 35 ... Flat plate portion, 36 ... Hook portion, 37 ... Boss portion, 38 ... Shaft, 40 ... Notch groove, 41 ... Lock claw, 42 ... Limit switch, 42a ... Contact, 50 ... Lifeline hook

In the past, depending on the platform, there was no suitable place for installing the safety belt hook. For example, when a safety belt hook is not installed on the lowermost floor , the most dangerous part of the inspection work in the pit is when the worker changes from the landing to the ladder and from the ladder to the landing.
Workers must move from the landing to the ladder by putting their feet and hands on the rung of the ladder in a hoistway. Because there is no safety belt hook on the landing side and you can not use the safety belt, there was a risk of falling into the pit, breaking the balance of the body when you stepped on the ladder rung .

The present invention, which said been made in view of the conventional problems of the art, in inspection work of the elevator, to be able to wear the safety belt, the safety of the elevator that can be installed without selecting a landing An object is to provide a band hook device.

In order to achieve the above object, an embodiment of the present invention provides a safety belt hook device for locking a lifeline of a safety belt worn by an operator who performs inspection work in an elevator hoistway. A storage case that is attached to a three-way frame that constitutes a rotating safety belt hook that is stored in the storage case and that can be hooked to the tip of the lifeline by rotating a predetermined angle to expose the lifeline from the storage case. The safety belt hook is formed of a substantially D-shaped hook in which a flat plate portion and a curved hook portion are integrated, and the hook portion hidden in the storage case by the flat plate portion rotates 180 °. The hook portion is formed with a notch groove, and a locking claw that rotates together with the lock engages with the notch groove. Rotation of is characterized in being locked.

Claims (5)

In the safety belt hook device for locking the lifeline of the safety belt worn by the worker who performs the inspection work in the elevator hoistway,
A storage case attached to the three-way frame that forms the elevator gate;
A rotary safety belt hook that is stored in the storage case and is exposed from the storage case by a hook portion that can be locked at the tip of the lifeline by rotating it by a predetermined angle;
An elevator safety belt hook device comprising:   The safety belt hook is formed of a substantially D-shaped hook in which a flat plate portion and a curved hook portion are integrated, and the hook portion hidden in the storage case by the flat plate portion is rotated outward by 180 °. The elevator safety belt hook device according to claim 1, wherein the elevator safety belt hook device is exposed.   3. The hook portion is formed with a notch groove, and a lock claw that rotates together with a lock engages with the notch groove to lock the rotation of the safety belt hook. The elevator safety belt hook device according to claim.   The elevator safety belt hook device according to claim 3, further comprising a switch that is turned on when the lock claw is in the unlocked position, and the elevator mode is switched to an inspection mode when the switch is turned on. .   The elevator safety belt hook device according to any one of claims 1 to 4, wherein the safety belt hook device is provided in a three-way frame of a landing on the lowest floor.

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