JP6841268B2 - Elevator car lock device and maintenance method using it - Google Patents

Description

The present invention relates to a car lock device for an elevator and a maintenance method using the same.

In recent years, there has been a demand for elevators in which not only the safety of users who use elevators is taken into consideration, but also the safety of workers who install and maintain elevators is taken into consideration.

For example, the European EN standard requires that any dangerous movement of the car be prevented by mechanical devices so that workers who maintain the hoisting machine, control panel, etc. on the car are not endangered.

As a dangerous movement of the car, it is conceivable that the car rises and reaches the top of the hoistway due to some trouble or erroneous operation while the operator is working on the car. In this case, the operator on the car may collide with the top of the hoistway.

The invention according to Patent Document 1 relates to an elevator car maintenance work jig capable of mechanically restricting the ascent of a car before a maintenance worker gets on the car.

Specifically, when carrying out maintenance work on the elevator car, one end is installed on the boarding side and the other end is brought into contact with the car before the maintenance worker gets on the car. The position of the car is fixed in this way.

Japanese Unexamined Patent Publication No. 2012-20800

However, the object to be maintained is not always near the top of the hoistway or each floor, and the operator cannot fix the car at an arbitrary height position to work, which causes a problem of poor workability. ..

And patent document 1 cannot solve such a problem.

An object of the present invention is to provide a car lock device capable of an operator working by fixing a car at an arbitrary height position.

Another object of the present invention is to provide a maintenance method that allows an operator to work by fixing the car at an arbitrary height position.

Another object of the present invention is to reduce the work man-hours in the installation or maintenance of the elevator.

Another object of the present invention is to enable a worker who performs maintenance or the like to work safely.

The elevator car lock device according to the first aspect of the present invention is a car lock device for maintaining an elevator that moves up and down in a hoistway.
A grip portion that grips the main rope for the elevator to move up and down,
An elevator car lock device including a fixing portion for fixing the grip portion in the hoistway.

The fixed portion can be fixed to a rail bracket or the like in the hoistway. The car lock device according to the present invention can be fixed at an arbitrary position on the main rope.

Workers who maintain elevators can easily fix the car without doing complicated things, and can reduce the work man-hours.

The car locking device according to the present invention can stop the car even when the car moves up and down due to a malfunction or the like, and a worker performing maintenance or the like can work safely.

Further, since the car locking device according to the present invention grips the main rope, in the case of 2: 1 roping as shown in FIG. 1, the holding force for holding the car is only half of the normal holding force.

That is, when one end of the main rope is fixed in the hoistway, the force applied to the main rope is halved by the weight of the car, so that the holding force for holding the car is halved.

The elevator car locking device according to the second aspect of the present invention is the elevator car locking device according to the first aspect, and the wire portion to which the fixing portion is directly or indirectly attached to the grip portion. When,
Including a mounting member attached to the wire portion,
The mounting member is an elevator car lock device that is mounted on the wire portion wound around a member provided in the hoistway.

The car lock device can be fixed in the hoistway by winding the wire portion around a member such as a rail bracket provided in the hoistway and attaching the mounting member to the wire portion.

The elevator car lock device according to the third aspect of the present invention is the elevator car lock device according to the second aspect, and the grip portion main body and the grip member for gripping the main rope. Including
This is an elevator car lock device in which the gripping force for gripping the main rope between the gripping portion main body and the gripping member is increased by pulling the wire portion.

Specifically, the gripping member moves to the main rope side in conjunction with the pulling of the wire portion, and the gripping force for gripping the main rope by the gripping portion main body and the gripping member increases.

With such a configuration, even if the car tries to move up and down due to a malfunction, if the car moves, the gripping force of the car lock member with respect to the main rope increases, so that the car can be prevented from moving. ..

In the elevator maintenance method according to the fourth aspect of the present invention, a car lock device for maintaining an elevator that moves up and down in a hoistway is provided.
A grip portion that grips the main rope for the elevator to move up and down,
A maintenance method for an elevator using a car lock device including a fixing portion for fixing the grip portion in the hoistway.
A gripping step of gripping the main rope with the gripping portion,
This is an elevator maintenance method including a fixing step of fixing the grip portion in the hoistway with the fixing portion.

With such an elevator maintenance method, it can be fixed at an arbitrary position on the main rope.

Workers who maintain elevators can easily fix the car without doing complicated things, and can reduce the work man-hours.

Further, as described above, in the case of 2: 1 roping as shown in FIG. 1, the holding force for holding the car is only half of the normal holding force.

The elevator maintenance method according to the fifth aspect of the present invention is the elevator maintenance method according to the fourth aspect, wherein the fixing portion is directly or indirectly attached to the grip portion with a wire portion.
Including a mounting member attached to the wire portion,
The fixing step is an elevator maintenance method including a hooking step of winding the wire portion in a hoistway and hooking the mounting member to the wire portion.

The car lock device can be fixed in the hoistway by winding the wire portion around a rail bracket or the like provided in the hoistway and attaching the mounting member to the wire portion.

The perspective view of the general elevator which concerns on this embodiment. The side view schematic view of the elevator which concerns on this embodiment. The partial perspective view of the elevator which concerns on this embodiment. The perspective view of the grip part of the car lock device of the elevator which concerns on this embodiment. The perspective view of the car lock device of the elevator which concerns on this embodiment. The perspective view of the grip part of the car lock device of the elevator which concerns on 2nd Embodiment. The flowchart of the maintenance method using the car lock device of the elevator which concerns on this embodiment.

Hereinafter, an embodiment of the elevator car lock device 800 according to the present invention will be described with reference to the drawings.

(Elevator 100)
As shown in FIGS. 1 and 2, in the elevator 100, a hoisting machine 200 is installed at the lower part of the hoistway.

One end of the main rope 220 wound around the drive sheave 210 of the hoisting machine 200 is fixed in the hoistway via the first car sheave 232 and the second car sheave 233 attached to the car 230. There is.

Further, the other end of the main rope 220 is fixed in the hoistway via a counterweight sheave 241 attached to the counterweight 240.

When the drive sheave 210 is rotationally driven by a motor (not shown) of the hoisting machine 200, the main rope 220 travels accordingly. Along with this, the car 230 to which the first car sheave 232 and the second car sheave 233 are attached is guided by the car guide rail 300 and moves up and down in the hoistway.

Similarly, as the main rope 220 travels, the counterweight 240 to which the counterweight sheave 241 is attached is guided by the counterweight guide rail 242 and moves up and down in the hoistway.

The traveling direction of the main rope 220 is changed by the first sheave 211 and the second sheave 212.

The elevator 100 is provided with a speed governor 400 that mechanically detects that the ascending / descending speed of the car 230 exceeds a predetermined speed. An endless governor rope 600 is wound between the governor sheave 410 of the governor 400 and the tension sheave 500 located below the governor sheave 410.

The governor rope 600 is stretched by the tension sheave 500 in a tensioned state in parallel with the main rope 220. A part of the governor rope 600 is fixed to an emergency stop lever 250 that operates an emergency stop device 231 provided on the car 230 side.

Therefore, the governor rope 600 travels at the same speed as the car 230 in synchronization with the raising and lowering of the car 230. At this time, the speed governor 400 detects the rotation speed of the governor sheave 410, which is rotated at the same speed as the traveling speed of the governor rope 600, so that the speed of the car 230 being moved up and down is detected.

When the ascending / descending speed of the car 230 reaches the first speed exceeding the rated speed (predetermined speed), the motor (not shown) constituting the hoisting machine 200 of the main rope 220 is braked.

If the car 230 does not stop even if the motor (not shown) is braked, when the predetermined second speed exceeds the first speed, the movable grip (not shown) by the trip lever (not shown) of the governor sheave 410 The support is released, and the running of the governor rope 600 is stopped by the movable grip.

Then, the emergency stop lever 250 fixed to the governor rope 600 is pulled by the governor rope 600 and is pulled up relative to the car 230. As a result, the emergency stop device 231 is activated and the car 230 is stopped.

If the car 230 does not stop even when the emergency stop device 231 is activated, the car 230 collides with the first oil buffer 700a, which is an oil buffer 700 arranged below. The first oil buffer 700a absorbs the impact of the car 230 and stops the car 230.

A second oil buffer 700b, which is an oil buffer 700, is also arranged below the counterweight 240. When the counterweight 240 drops, the second oil buffer 700b absorbs the impact of the drop of the counterweight 240 and stops the counterweight 240.

(Basket lock device 800)
<First Embodiment>
As shown in FIG. 3, the car lock device 800 includes a grip portion 810 that grips the main rope 220 and a grip portion 810.
Includes a fixing portion 820 that is attached and fixed to the rail bracket 310 to which the guide rail 300 is attached.

As shown in FIG. 4, the grip portion 810 includes the grip portion main body 811 and the grip portion 810.
A gripping member 812 that grips the main rope 220 with the gripping portion main body 811 and
The first movable member 813 that moves the gripping member 812 and
Includes a second movable member 814 that moves the first movable member 813.

The grip portion main body 811 includes a first end portion 811a to which the first movable member 813 is rotatably attached.
A holding portion 811b that grips the gripping member 812 and the main lobe 220, and
Includes a second end 811c provided with a through hole.

The gripping portion main body 811 projects in the positive direction of the z-axis so that the holding portion 811b grips the main rope 220.

Since the second end portion 811c is provided with a through hole through which the second movable member 814 passes, the second end portion 811c also protrudes in the positive direction of the z-axis.

The first end portion 811a is provided with a through hole penetrating in the z-axis direction, and the first movable member 813 is rotatably attached by the first bolt 815.

The sandwiching portion 811b projects in the positive direction of the z-axis, and sandwiches the main rope 220 with the gripping member 812.

The grip portion main body 811 may have a configuration in which a groove extending in the x-axis direction is provided in a portion where the main rope 220 is sandwiched (a portion in contact with the main rope 220).

The second end portion 811c is provided with a through hole in a direction parallel to the xy plane, and the second movable member 814 is inserted into the through hole.

The gripping member 812 moves in the y-axis direction in conjunction with the movement of the first movable member 813. The gripping member 812 sandwiches the sandwiching portion 811b and the main rope 220.

Specifically, the gripping member 812 is provided with a through hole penetrating in the z-axis direction on the negative side of the y-axis, and the second bolt 816 inserted into the through hole is provided with respect to the first movable member 813. It is rotatably attached.

Then, the first movable member 813 rotates counterclockwise when viewed from the z-axis positive direction side in the xy plane around the first bolt 815, so that the gripping member 812 is centered on the second bolt 816 in the xy plane. In, it rotates clockwise when viewed from the z-axis positive direction side and moves to the y-axis positive direction side.

Then, as the gripping member 812 moves in the positive direction of the y-axis, the main rope 220 is sandwiched between the grip member 812 and the sandwiching portion 811b, and the main rope 220 is sandwiched.

In the present embodiment, the first movable member 813 is a member having a substantially triangular shape in xy plan view.

The first movable member 813 has a third end portion 813a, which is an end portion on the negative direction side of the x-axis, and the first movable member 813.
The fourth end 813b, which is the end on the positive side of the y-axis,
It includes a fifth end portion 813c, which is an end portion on the positive direction side of the x-axis.

The third end portion 813a on the negative direction side of the x-axis is provided with a through hole in the z-axis direction, and is rotatably formed in the first end portion 811a of the gripping main body portion 811 by the first bolt 815 inserted into the through hole. It is installed.

The fourth end portion 813b on the positive direction side of the y-axis is provided with a through hole in the z-axis direction and is rotatably attached to the grip member 812 by a second bolt 816 inserted into the through hole.

The fifth end portion 813c on the positive direction side of the x-axis is provided with a through hole in the z-axis direction, and is rotatably attached to the second movable member 814 by a third bolt 817 inserted into the through hole.

The second movable member 814 includes a sixth end portion 814a on the negative direction side of the x-axis and a seventh end portion 814b on the positive direction side of the x-axis.

The second movable member 814 is inserted into the through hole of the second end portion 811c of the grip portion main body 811.

The sixth end portion 814a on the negative direction side of the x-axis is provided with a through hole in the z-axis direction, and is rotatable with respect to the first movable member 813 by the third bolt 817 inserted into the through hole. It is attached.

The seventh end portion 814c on the positive direction side of the x-axis is provided with a through hole in the z-axis direction, and the fixing portion 820 is attached to the through hole.

By pulling the second movable member 814 to the positive direction side of the x-axis, the first movable member 813 rotates counterclockwise when viewed from the positive direction side of the z-axis around the first bolt 815, and the gripping member 812 It moves in the positive direction of the y-axis, and the main rope 220 is sandwiched between the gripping member 812 and the sandwiching portion 811b of the gripping portion main body 811.

The fixing portion 820 includes a connecting portion 830 attached to the second movable member 814 and a connecting portion 830.
The wire part 840 attached to the connection part 830 and
Includes a mounting member 850 that hooks onto the wire portion 840.

The connecting portion 830 is a shackle in the present embodiment, and connects the grip portion 810 and the wire portion 840.

In the present embodiment, the connecting portion 830 is rotatably attached to the through hole of the seventh end portion 814c of the second movable member 814 by the fourth bolt 818.

A wire portion 840 having a ring-shaped tip is attached to the connection portion 830.

The wire portion 840 includes an eighth end portion 841 having a ring-shaped tip and a wire portion 840.
It is an end portion opposite to the eighth end portion 841, and includes a ring-shaped ninth end portion 842.

The length of the wire portion 840 may be adjustable. In this case, it has an adjusting unit (not shown) that can adjust the length of the wire.

The eighth end portion 841 is connected to the second movable member 814 by the connecting portion 830. A mounting member 850 is attached to the ninth end portion 842.

The mounting member 850 includes a U-shaped mounting member main body 851 in xy plan view, a fifth bolt 852, and a nut 853 screwed into the fifth bolt 852.

Through holes are provided in the tenth end portion 851a and the eleventh end portion 851b, which are the ends of the mounting member main body 851, and the fifth bolt 852 is inserted.

A nut 853 is screwed into the end portion (11th end portion 851b side) of the fifth bolt 852 inserted into the through hole of the mounting member main body 851.

The ninth end portion 842 of the wire portion 840 is attached to the attachment member main body 851. Specifically, the mounting member main body 851 is inserted into the ring portion of the ninth end portion 842.

A space is formed between the mounting member main body 851 and the fifth bolt 852, forming a ring shape.

Wrap the wire part 840 around a part of the hoistway such as the rail bracket 310, put the wire part 840 in the ring formed by the mounting member main body 851 and the fifth bolt 852, and fix the fifth bolt 852 with the nut 853. To do.

As a result, even if the car 230 tries to rise or fall due to a malfunction, for example, the second movable member 814 is pulled by pulling the wire portion 840, so that the gripping member 812 grips the main rope 220. Move in the direction you want.

Therefore, the more the wire portion 840 is pulled, the greater the gripping force for gripping the main rope 220, and the movement of the car 230 due to malfunction or the like can be prevented.

<Second Embodiment>
The second embodiment describes a grip portion 910 having a form different from that of the grip portion 810 of the first embodiment. The same contents as those in the first embodiment will be omitted or briefly described.

The grip portion 900 includes a first grip portion main body 910 and a second grip portion main body 920 arranged on the z-axis negative direction side from the first grip portion main body 910.

The first grip portion main body 910 has a substantially T-shape in the xy plane view, and has a first groove portion 911 parallel to the y-axis direction on the z-axis negative direction side.
An eighth end portion 912 having a first through hole 912a penetrating in the z-axis direction, and
Includes a plurality of second through holes (not shown) for passing the fourth bolt 930.

The first groove portion 911 is a groove for gripping the main rope 220, and is a groove having a substantially triangular shape in the xz plane with the apex on the positive direction side of the z-axis.

In the present embodiment, the first groove portion 911 is provided with as many grooves as the number of main ropes 220.

The eighth end portion 912 is a portion for connecting to the fixed portion 820. The eighth end portion 912 has a first through hole 912a penetrating in the z-axis direction.

In the present embodiment, the eighth end portion 912 protrudes in the negative direction of the x-axis, but the configuration may not protrude.

A plurality of second through holes (not shown) are provided in the first grip portion main body 910. In this embodiment, six second through holes (not shown) are provided.

The second grip portion main body 920 has a substantially T-shape in the xy plane view, and has a second groove portion 921 parallel to the y-axis direction on the z-axis positive direction side and a second groove portion 921.
A ninth end 922 having a third through hole (not shown) penetrating in the z-axis direction, and
Includes a plurality of fourth through holes (not shown) for passing the fourth bolt 930.

The second groove portion 921 is a groove for gripping the main rope 220, and is a groove having a substantially triangular shape in the xz plane with the apex on the negative direction side of the z-axis.

In the present embodiment, the second groove portion 921 is provided with as many grooves as the number of main ropes 220.

The ninth end portion 922 is a portion for connecting to the fixed portion 820. The ninth end portion 922 has a third through hole (not shown) penetrating in the z-axis direction.

In the present embodiment, the ninth end portion 922 protrudes in the negative direction of the x-axis, but the configuration may not protrude.

By overlapping the first grip portion main body 910 and the second grip portion main body 920, the first through hole 912a and the third through hole (not shown) overlap each other, and the connection portion 830 is attached thereto.

A plurality of fourth through holes (not shown) are provided in the second grip portion main body 920. In this embodiment, six fourth through holes (not shown) are provided.

The first grip portion main body 910 and the second grip portion main body 920 are overlapped with the main rope 220 sandwiched between them, and the fourth bolt 930 is inserted into the second through hole (not shown) and the fourth through hole (not shown). Fix with a through nut (not shown). The fixing portion 820 is the same as that of the first embodiment.

As a result, the main rope 220 is gripped by the grip portion 900 and has the same effect as that of the first embodiment.

(Maintenance method using the car lock device 800)
The maintenance method using the car lock device 800 is shown in the flowchart of FIG.

When the operator who maintains the elevator 100 gets on the car 230, the wire portion 840 is wound around the rail bracket 310.

That is, in order to maintain the elevator 100, the operator rides on the car 230 and makes the rail bracket 310 or the like go around the wire portion 840 of the car lock device 800 (step S11).

Next, the operator hooks the mounting member 850 of the car lock device 800 to the wire portion 840 (step S12, hooking step, fixing step).

Next, the operator grips the main rope 220 with the gripping portion 810 (step S13, gripping step).

The operator pulls the wire portion 840 and firmly grips the main rope 220 with the grip portion 810.

The operator may first perform the work of gripping the main rope 220 by the grip portion 810.

In the case of 2: 1 roping as shown in FIG. 1, the holding force is halved because the main rope 220 is held in the present invention as compared with the case where the elevator 100 directly holds (supports) the car 230. It has the effect of.

The present invention can also be carried out in a mode in which various improvements, modifications, or modifications are added without departing from the spirit of the present invention.

100 ... Elevator 200 ... Hoisting machine 230 ... Basket 240 ... Counterweight 242 ... Counterweight guide rail 300 ... Guide rail 400 ... Governor 500 ... Tension sheave 600 ... Governor rope 700 ... Oil buffer 800 ... Car lock device 810 ... Grip 811 ... Grip part main body 812 ... Grip member 813 ... First movable member 814 ... Second movable member 815 ... First bolt 816 ... Second bolt 817 ... Third bolt 820 ... Fixed part 830 ... Connection part 840 ... Wire part 850 ... Mounting member 900 ... Grip portion 910 ... First grip portion main body 920 ... Second grip portion main body 930 ... Fourth bolt

Claims (5)

A car lock device for maintaining elevators that move up and down in the hoistway.
A grip portion that grips the main rope for the elevator to move up and down,
Look including a fixing portion that fixes the grasping portion in the hoistway,
The fixing portion includes a wire portion attached to the grip portion and a wire portion.
Including a mounting member attached to the wire portion,
The grip portion includes a grip portion main body and a grip member for gripping the main rope.
Including a movable member to which the wire portion is attached.
By pulling the movable member to the wire portion,
An elevator car lock device in which the gripping member is movable to increase the gripping force for gripping the main rope between the gripping portion main body and the gripping member. The movable member is attached to the gripping member, and the first movable member that moves the gripping member and
The car lock device for an elevator according to claim 1, wherein the first movable member and the wire portion are attached to the second movable member to move the first movable member. The mounting member is a mounting member main body to which the wire portion is mounted, and
Including bolts connected to the mounting member body,
The elevator car lock device according to claim 1 or 2, wherein the wire portion is inserted into a ring formed by the mounting member main body and the bolt. A car lock device for maintaining elevators that move up and down in the hoistway
A grip portion that grips the main rope for the elevator to move up and down,
Including a fixing portion for fixing the grip portion in the hoistway ,
The fixing portion includes a wire portion attached to the grip portion and a wire portion.
Looking at the mounting member attached to the wire part,
The grip portion includes a grip portion main body and a grip member for gripping the main rope.
A movable member to which the wire portion is attached, the A maintenance method for an elevator with a free propagule locking device,
A gripping step in which the gripping member is moved by pulling the movable member by the wire portion to increase the gripping force for gripping the main rope between the gripping portion main body and the gripping member.
An elevator maintenance method including a fixing step of fixing the grip portion in a hoistway with the fixing portion. The mounting member is a mounting member main body to which the wire portion is mounted, and
Including bolts connected to the mounting member body,
The fixing process
A claim including a hooking step of winding the wire portion in a hoistway, inserting the wire portion into a ring formed by the mounting member main body and the bolt, and hooking the mounting member to the wire portion. 4 Elevator maintenance method.

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