JP2004010222A - Locking releasing device for elevator tie down device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable release of a lock of a weight at a guide rail even when a vertical gap between the stopper and the weight of an elevator tie down device is narrow. <P>SOLUTION: A weight 12 to tightly stretch a compensation rope 4 by energizing downward a tension wheel 8 around which the compensation rope 4 is wound is locked at a pair of right and left guide rails 6 to guide elevation of the tension wheel 8 in emergency. Since a jack to release the locking for the guide rail 6 by pressing down the weight 12 is held by a horizontal beam-form stopper 21 formed that a cylinder element 22 is fixed between the upper parts of a pair of the guide rails 6 on both sides, only a ram 23 is present between a stopper 21 and the weight 12. This constitution enables pressing down of the weight 12 by using the jack even when a gap in a vertical direction between the stopper 21 and the weight 12 is narrow. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for unlocking a support of a tensioner on a guide rail in an elevator tie-down device, and more specifically, a sufficient clearance is provided between a stopper attached to a guide rail and a support. The present invention relates to a technique for easily releasing the engagement of a support with a guide rail even when there is no support.
[0002]
[Prior art]
Conventionally, in a fishing bottle type elevator shown in FIG. 9, a main rope R is wound around a main sheave 1 of a hoisting machine, and a car 2 and a counterweight 3 attached to both ends of the main rope R are illustrated. Ascending and descending guided by a guide rail that is not.
A compensating rope 4 having both ends connected to the lower part of the car 2 and the counterweight 3 hangs between the car 2 and the counterweight 3.
[0003]
By the way, for example, when the descending speed of the car 2 exceeds a specified value, the emergency stop device 2a is operated and the car 2 is stopped emergencyly, but the counterweight 3 continues to rise by the inertial force and then falls. To apply a large impact force to the main rope R.
Therefore, a tie-down device 5 is provided at the bottom of the elevator hoistway in order to prevent the counterweight 3 from rising and falling due to inertial force.
[0004]
The structure of the tie-down device 5 will be briefly described with reference to FIGS. 10 to 12. A support frame 7 which can be moved up and down by being guided by a guide portion 7 a slidably engaged with a pair of left and right dedicated guide rails 6 is provided. A tensioning sheave 8 on which a compensating rope 4 is wound is rotatably supported.
A weight 12 is fixed to the upper surface of a frame holding plate 11 supported by a tie-down spring 9 and a rod 10 above a top plate 7b of the support frame 7.
As a result, the support frame 7 is pushed down by the weight of the weight 12, so that the compensating rope 4 wound around the tension pulley 8 is pulled downward, and is always kept taut.
[0005]
On the other hand, even if the car 2 is stopped in an emergency, the counterweight 3 continues to rise due to the inertial force, so that the compensating rope 4 is not displaced on the side of the car, but the side of the counterweight 3 is raised.
Then, the tension wheel 8 and the support frame 7 are also pulled up, so that the rod 10 whose lower end is fixed to the top plate 7b of the support frame 7 also moves up.
On the other hand, the rod 12 is displaced upward relative to the weight 12 because the weight 12 tends to stop at that position due to the inertial force due to its weight.
Accordingly, an arm 15 whose one end is pivotally supported by the bracket 13 provided at the upper end of the rod 10 and whose center in the longitudinal direction is pivotally supported on the side surface of the weight 12 by the pin 14 is swung. Then, the roller 16 attached to the swing end is displaced downward.
Accordingly, the roller 16 bites between the inclined surface 12a of the weight 12 and the side surface of the guide rail 6, so that the weight 12 is locked to the guide rail 6.
[0006]
Even after the weight 12 is locked to the guide rail 6 by the roller 16, the support frame 7 and the pulley 8 pulled up by the compensating rope 4 continue to rise.
Then, the shock absorbing spring 17 provided on the top plate 7b of the support frame 7 comes into contact with the stopper 11a provided on the lower surface of the frame holding plate 11, and is compressed vertically, so that the counterweight 3 is moved. The energy to be raised is absorbed by the shortening of the shock absorbing spring 17.
As a result, the lifting of the counterweight 3 is prevented, so that it is possible to prevent an impact force from acting on the main rope R due to the fall.
[0007]
[Problems to be solved by the invention]
In the elevator tie-down device 5 described above, when the operation of the elevator is returned to a normal state, it is necessary to release the lock of the weight 12 with respect to the guide rail 6.
Therefore, as shown in FIG. 12, a pair of left and right hydraulic jacks 19 is placed on the upper surface 12b of the weight 12 after a horizontal beam-shaped stopper 18 is fixed between the upper portions of the pair of left and right guide rails 6. I do.
Then, pressure oil is supplied through the hydraulic pipe 19a, and the ram 19b is protruded upward so that the tip of the ram 19b contacts the lower surface of the horizontal beam stopper 18.
Thereafter, the pressurizing oil is further supplied to protrude the ram 19b further upward, thereby pushing down the weight 12 and separating the roller 16 from the inclined surface 12a of the weight 12, thereby releasing the engagement of the weight 12 with the guide rail 6. I do.
[0008]
However, if there is no sufficient vertical gap between the horizontal beam-shaped stopper 18 and the weight 12, the hydraulic jack 19 cannot be interposed between them. In this case, it is necessary to pull down the frame holding plate 11 using a chain block, disassemble the tie-down device 5 on site, release the lock, and then reassemble, and this consumes much labor and time. Was.
[0009]
In addition, since the pair of left and right hydraulic jacks 19 is simply placed on the weight 12, the posture of the hydraulic jack 19 is unstable.
Furthermore, when the tie-down device 5 is large, it is difficult to place the heavy hydraulic jack 19 on the weight 12.
[0010]
Therefore, an object of the present invention is to solve the above-described problems of the related art, and even if there is not a sufficient vertical gap between the horizontal beam-shaped stopper 18 and the weight 12, the guide rail 6 can be used. An object of the present invention is to provide an unlocking device for an elevator tie-down device 5 that can easily unlock the weight 12.
[0011]
[Means for Solving the Problems]
Means for solving the above-mentioned problem is that a compensating rope hanging between an elevator car and a counterweight is wound around a tension pulley arranged at a lower portion of a hoistway, and the emergency rope is used in an emergency. An upward displacement of the support is prevented by engaging a frictional engagement member between the support of the tensioning wheel and a guide rail for guiding the lift to lock the support to the guide rail. In a tie-down device, a device for releasing the lock of the support to the guide rail,
A jack for pushing down the support,
A cylinder body held by a stopper fixed to the upper part of the guide rail,
A ram that protrudes downward from the cylinder body when the pressurized fluid is supplied to the cylinder body and pushes down the support.
[0012]
That is, the release device described in claim 1 is for the elevator tie-down device described in the section of the related art described above.
At this time, the cylinder body of the jack that pushes down the support (weight) is held by the stopper, and the cylinder body does not exist at all or only partially exists in the vertical gap between the stopper and the support. Therefore, even if the gap between them is small, a jack can be interposed between them.
Further, the operation of placing the hydraulic jack on the support during the unlocking operation as in the prior art is unnecessary, and the hydraulic jack does not become unstable during the operation.
[0013]
According to a third aspect of the present invention, a compensating rope hanging between an elevator car and a counterweight is wound around a tension pulley provided at a lower portion of a hoistway, and an emergency is performed. Occasionally, the upward displacement of the compensating rope is prevented by engaging a frictional engagement member between the support of the tension wheel and a guide rail for guiding the lifting and lowering of the tension rope, thereby locking the support to the guide rail. In a tie-down device for blocking, it is a device for releasing the lock of the support to the guide rail,
A cam member rotatably supported by a stopper fixed to an upper portion of the guide rail and having a cam surface that comes into contact with the support; and rotating means for rotating the cam member. And
[0014]
That is, the lock release device described in claim 3 is for the elevator tie-down device described in the section of the related art described above.
At this time, since a cam member, not a hydraulic jack, is interposed between the stopper and the support (weight), the support can be easily pushed down even if the gap between them is small.
The cam member can be formed, for example, in a disk shape attached eccentrically to a rotation shaft extending in the horizontal direction. In this case, the outer peripheral surface of the disk serves as the cam surface, and the distance between the cam surface and the axis of the rotation shaft differs depending on the position in the circumferential direction. Therefore, when a portion of the cam surface having a short distance from the axis of the rotating shaft is first brought into contact with the upper surface of the support, and then the disc is gradually rotated around the rotating shaft, Since a portion of the surface having a long distance from the axis of the rotating shaft comes into contact with the upper surface of the support, the support can be gradually pushed down.
On the other hand, the cam member is a circle having a downward cam surface which is supported by a stopper so as to be rotatable about a rotation shaft extending in the vertical direction and which extends obliquely with respect to the axis of the rotation shaft. It can also be formed in a column shape. In this case, a portion of the cam surface that is short from the lower end of the stopper is first brought into contact with the upper surface of the support, and then this cylinder is gradually rotated around the rotation axis, so that the cam surface has Of these, the portion that is longer from the lower end of the stopper comes into contact with the upper surface of the support, so that the support can be gradually pushed down.
Means for rotating such a cam member include an arm member attached to a rotating shaft that rotates integrally with the cam member and extending radially outward, and a hydraulic pressure that pushes the tip of the arm member. And a cylinder.
Alternatively, a hydraulic motor that rotationally drives a rotation shaft that rotates integrally with the cam member may be used.
[0015]
According to a fourth aspect of the present invention, a compensating rope hanging between an elevator car and a counterweight is wound around a tension pulley provided at a lower portion of a hoistway, and an emergency is provided. Occasionally, the upward displacement of the support is prevented by engaging a frictional engagement member between the support of the tensioning wheel and a guide rail for guiding the lifting and lowering of the support to the guide rail. In a tie-down device for blocking, it is a device for releasing the lock of the support to the guide rail,
A stopper fixed to an upper portion of the guide rail, having a pair of left and right stopper-side inclined surfaces inclined downward and divergent toward each other while facing the support body in the up-down direction,
A cylinder body horizontally supported on the support,
A pair of left and right rams projecting horizontally from the cylinder body when a pressure fluid is supplied,
Sliding members respectively attached to the pair of left and right rams, each having a sliding surface that slides on a pair of left and right stopper side inclined surfaces of the stopper,
It is characterized by having.
[0016]
That is, the lock release device described in claim 4 is for the elevator tie-down device described in the section of the related art described above.
At this time, since the cylinder body and the ram extending in the horizontal direction, not in the vertical direction, are provided between the stopper and the support (weight), the jack is interposed between the two even if the gap between them is small. be able to.
When the pair of left and right rams protrude from the cylinder body in the horizontal direction, the sliding surfaces of the sliding members attached to the pair of left and right rams respectively slide with the pair of left and right stopper-side inclined surfaces provided on the stopper. .
Then, since the pair of left and right stopper-side inclined surfaces are inclined downward and divergently toward each other, the pair of left and right sliding members, the pair of left and right rams, and the cylinder body are displaced downward, and the support of the tie-down device is displaced. Press down.
In addition, since the pair of left and right sliding members, the pair of right and left rams, and the cylinder body are held between the pair of left and right stopper-side inclined surfaces, they can fall off from the support during the work of releasing the lock. Absent.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, with reference to FIG. 1 to FIG. 8, each embodiment of the lock release device of the elevator tie-down device according to the present invention will be described in detail.
In the following description, the same portions will be denoted by the same reference characters and description thereof will be omitted.
[0018]
First embodiment
First, the lock release device 20 according to the first embodiment will be described in detail with reference to FIGS.
[0019]
The elevator tie-down device 5 shown in FIGS. 1 and 2 that uses the lock release device 20 of the first embodiment is the same as the conventional tie-down device shown in FIGS. Is omitted.
[0020]
The lock release device 20 of the first embodiment includes a horizontal beam-shaped stopper 21 spanned between upper portions of a pair of left and right guide rails 6 for guiding the up and down movement of the tension sheave 8. As shown in FIG. 4, the stopper 21 sandwiches the guide portions 6a of the pair of left and right guide rails 6 by facing a pair of front and rear members 21a and 21b obtained by bending a steel band-shaped thick plate into a U-shape. At the same time, both ends are fixed to a pair of left and right guide rails 6 by a plurality of bolts and nuts B.
Further, a curved portion 21c for sandwiching and holding a pair of left and right cylinder bodies 22 described below is formed on each of the members 21a and 21b so as to face each other at an intermediate portion in the longitudinal direction.
The stopper 21 is left between the upper portions of the pair of left and right guide rails 6 even during the normal operation of the elevator. However, the vertical position of the stopper 21 selects the bolt hole 6b through which the bolt nut B is inserted. This can be adjusted.
[0021]
The pair of left and right cylinder bodies 22 are sandwiched between the members 21a and 21b of the horizontal beam stopper 21 so as to be positioned above the lower surface 21c of the horizontal beam stopper 21 as shown in FIGS. Then, it is tightened and held by a plurality of bolts and nuts B.
[0022]
When a pair of left and right rams 23 are fitted to the pair of left and right cylinder bodies 22 so as to be able to protrude and retract in the up and down direction, respectively, when pressure oil (pressure fluid) is supplied to the cylinder bodies 22 through the pipes 24, And push down the pair of right and left weights (supports) 12 respectively.
Then, the roller (frictional engagement member) 16 biting between the inclined surface 12a of the weight 12 and the side surface of the guide rail 6 is displaced to the upper side of the inclined surface 12a, so that the weight 12 is locked to the guide rail 6. Can be canceled.
[0023]
At this time, since the cylinder body 22 held by the stopper 21 is disposed above the lower surface 21 c of the stopper 21, only the pair of left and right rams 23 is provided in the vertical gap between the stopper 21 c and the weight 12. Exists.
Thus, even when the vertical gap between the stopper 21c and the weight 12 is small, the weight 12 can be pushed down to release the engagement of the weight 12 with the guide rail 6.
Further, since the cylinder body 22 is held by the stopper 21, it is not necessary to place the hydraulic jack on the weight 12 at the time of unlocking work as in the conventional case, and the hydraulic jack is not required at the time of work. No instability.
[0024]
Further, the most significant feature of the lock release device 20 of the first embodiment is that the ram 23 projects downward from the cylinder body 22 held by the stopper 21 toward the weight 12.
As a result, if the weight 12 continues to rise without the tie-down device 5 operating properly in an emergency when the elevator car stops in an emergency, the weight 12 contacts the lower end of the ram 23.
At this time, if the hydraulic shock absorber is constituted by the cylinder main body 22 and the ram 23, the lifting of the weight 12 can be prevented by the hydraulic shock absorber, so that the weight 12 is securely engaged with the guide rail 6. Can be stopped.
[0025]
In order to constitute such a hydraulic shock absorber, a ram 23 pushed up by the weight 12 in an emergency enters the cylinder main body 22 so that the pressure oil stored in the cylinder main body 22 is discharged to the outside in the middle of the path. An orifice is provided for
A check valve may be provided in the middle of the pipe 24 for supplying the pressure oil to the cylinder body 22.
[0026]
Second embodiment
Next, an unlocking device 30 according to a second embodiment will be described in detail with reference to FIGS.
The tie-down device 5 of the elevator using the unlocking device 30 of the second embodiment is also the same as the conventional tie-down device shown in FIGS. 10 and 11, and the description thereof is omitted here.
[0027]
The lock release device 30 of the second embodiment includes a horizontal beam-shaped stopper 31 spanned between upper ends of a pair of left and right guide rails 6 for guiding the up and down movement of the tension sheave 8. As shown in FIG. 6, the stopper 31 sandwiches the guide portions of the pair of left and right guide rails 6 by facing a pair of front and rear members 31 a and 31 b formed by bending a steel band-shaped thick plate into a U-shape. Are fixed to a pair of left and right guide rails 6 by a plurality of bolts and nuts B.
In addition, unlike the stopper 21 of the first embodiment described above, the intermediate portion in the longitudinal direction extends in a straight line in parallel with each other.
[0028]
A pair of eccentric cams (cam members) 32 disposed symmetrically in the left and right directions are arranged inside the narrow gap between the members 31a and 31b constituting the stopper 31 so that the stopper 31 moves in the front-rear direction (the paper surface shown in FIG. 5). (In a direction perpendicular to the horizontal direction), and is supported so as to rotate integrally with a horizontal rotation shaft 33 penetrating therethrough.
The pair of left and right eccentric cams 32 are formed in a circular shape from a steel thick plate, and the outer peripheral surface is a cam surface. The distance between this cam surface and the axis of the horizontal rotation shaft 33 is the circle of the eccentric cam 32. It changes gradually in the circumferential direction.
[0029]
A base end of a swing arm 34 extending radially outward with respect to the axis of the horizontal rotation shaft 33 is attached to each of the front and rear ends of the pair of left and right horizontal rotation shafts 33 by spline fitting. .
A pair of left and right support shafts 35, which are stretched between the swing ends of the swing arms 34 and are spline-fitted, respectively, have a base end of a cylinder body 36 extending horizontally in the left-right direction and the cylinder body 36. The tips of the rams 37 that protrude and retract are supported so as to be relatively rotatable.
[0030]
As shown in FIG. 5, in the pair of left and right eccentric cams 32, portions of the outer peripheral cam surfaces, which are short in distance from the axis of the horizontal rotation shaft 33, are in contact with the upper surface of the weight (support) 12.
At this time, when pressurized oil (pressure fluid) is supplied to the cylinder main body 36 through the pipe 38, the ram 37 enters the inside of the cylinder main body 36, so that the pair of left and right eccentric cams 32 move in the direction of the arrow shown in FIG. Rotate gradually.
Then, the outer peripheral cam surfaces of the pair of left and right eccentric cams 32 slide on the upper surface of the weight 12, and a portion having a longer distance from the axis of the horizontal rotation shaft 33 comes into contact with the upper surface of the weight 12. The pair of right and left weights 12 can be pushed down.
[0031]
That is, since the lock release device 30 of the third embodiment has the eccentric cam 32 interposed between the stopper 31 and the weight 12, even if the vertical gap between the stopper 31 and the weight 12 is small. The weight 12 can be pushed down to release the lock of the weight 12 with the guide rail 6.
Adjustment of the rotation position of the pair of left and right eccentric cams 32 and adjustment of the position of the swing arm 34 with respect to the horizontal rotation shaft 33 according to the size of the vertical gap between the stopper 31 and the weight 12 are performed by the horizontal rotation shaft 33. It may be performed by adjusting the spline fitting position between the swing arm 34 and the swing arm 34.
[0032]
Third embodiment
Next, an unlocking device 40 according to a third embodiment will be described in detail with reference to FIG. The elevator tie-down device 5 using the lock release device 40 according to the third embodiment is also the same as the conventional tie-down device shown in FIGS. 10 and 11, and the description thereof is omitted here.
[0033]
The lock release device 40 of the third embodiment includes a horizontal beam-shaped stopper 41 spanned between the upper ends of a pair of left and right guide rails 6 for guiding the up and down movement of the tension sheave 8. The stopper 41 sandwiches the guide portions of the pair of left and right guide rails 6 by facing a pair of front and rear members formed by bending a steel band-shaped thick plate into a U-shape like the stopper 31 of the second embodiment described above. In addition, it is fixed to a pair of left and right guide rails 6 by a plurality of bolts and nuts B.
A trapezoidal cutout is formed at the lower end of the middle portion in the longitudinal direction so as to form a pair of left and right stopper-side inclined surfaces 41a and 41b.
The stopper-side inclined surfaces 41a and 41b face the pair of left and right weights (supports) 12 and diverge downward from each other while facing up and down, in other words, when viewed from the front as shown in FIG. It is inclined downward in a C shape and extends downward.
[0034]
The cylinder body 42 is mounted on the pair of left and right weights 12 via the flat base 42a.
A pair of left and right sliding members 44 is attached to a pair of left and right rams 43 projecting horizontally from the cylinder body 42.
The pair of left and right sliding members 44 are provided with sliding surfaces 44a and 44b respectively sliding on the pair of left and right stopper-side inclined surfaces 41a and 41b.
[0035]
When the pressure oil is supplied to the cylinder body 42 via the pipe 45, the pair of left and right rams 43 project horizontally in the left and right direction, respectively, and the sliding surfaces 44a and 44b of the pair of left and right sliding members 44 respectively form the pair of left and right stoppers. It contacts the side inclined surfaces 41a and 41b.
When pressure oil is further supplied to the cylinder body 42 from this state, the pair of left and right sliding members 44 slide downward on the pair of left and right stopper-side inclined surfaces 41a and 41b, respectively. The pair of left and right rams 43 and the cylinder body 42 are displaced downward, and push down the pair of right and left weights 12.
[0036]
That is, since the lock release device 40 of the third embodiment has the cylinder body 42 and the ram 43 extending horizontally between the stopper 41 and the pair of right and left weights 12, the stopper 41 and the left and right Even if the gap between the pair of weights 12 is small, the pair of right and left weights 12 can be reliably pushed down to release the engagement with the guide rail 6.
Since the pair of left and right sliding members 44, the pair of right and left rams 43, and the cylinder body 42 are held between the pair of left and right stopper-side inclined surfaces 41a, 41b, the engagement of the weight 12 with the guide rail 6 is released. During the work, the weight 12 does not fall off.
[0037]
Fourth embodiment
Next, an unlocking device 50 according to a fourth embodiment will be described in detail with reference to FIG. The elevator tie-down device 5 using the lock release device 50 according to the fourth embodiment is also the same as the conventional tie-down device shown in FIGS. 10 and 11, and a description thereof will be omitted.
[0038]
The lock release device 50 of the fourth embodiment includes a horizontal beam-shaped stopper 51 spanned between upper ends of a pair of left and right guide rails 6 for guiding the up and down movement of the tension sheave 8. The stopper 51 is formed substantially the same as the stopper 41 of the above-described third embodiment. A trapezoidal notch is formed at the lower end of the intermediate portion in the longitudinal direction, so that a pair of left and right stopper-side inclinations is formed. Surfaces 51a and 51b are formed.
The stopper-side inclined surfaces 51a and 51b are opposed to the pair of left and right weights (supports) 12 and diverge downward from each other while facing up and down, in other words, when viewed from the front as shown in FIG. It is inclined downward in a C shape and extends downward.
[0039]
A cylinder body 52 is provided between the stopper 51 and the pair of left and right weights 12 so as to extend horizontally.
A pair of left and right sliding members 54 formed in a wedge shape are attached to a pair of left and right rams 53 projecting horizontally from the cylinder body 52.
The pair of left and right sliding members 54 includes a pair of left and right stopper-side inclined surfaces 51 a and 51 b and a pair of left and right weight-side inclined surfaces (support-side inclined surfaces) 12 c and 12 d formed on the upper surfaces of the pair of left and right weights 12. Be pinched.
The pair of left and right weight-side inclined surfaces 12c and 12d are divergent upward from each other while opposing the pair of left and right stopper-side inclined surfaces 51a and 51b in the vertical direction, in other words, viewed from the front as shown in FIG. Sometimes it is inclined upward in an inverted C shape and extends upward.
[0040]
When the pressure oil is supplied to the cylinder body 52 via the pipe 55, the pair of left and right rams 53 project horizontally in the left and right directions, respectively. It enters between the pair of stopper-side inclined surfaces 51a and 51b and the pair of left and right weight-side inclined surfaces 12c and 12d, and pushes down the pair of left and right weights 12.
At this time, the angle between the pair of left and right stopper-side inclined surfaces 51a, 51b and the pair of left and right weight-side inclined surfaces 12c, 12d is small, and the sliding member 54 is formed in a wedge shape. However, the pair of left and right weights 12 can be easily pushed down even if the force for horizontally projecting the pair of left and right rams 53 is small.
As a result, the capacity of the hydraulic jack composed of the cylinder body 52 and the pair of left and right rams 53 can be small, so that even if the vertical gap between the stopper 51 and the pair of left and right weights 12 is small, the guide rail 6 is opposed to the guide rail 6. The locking of the pair of right and left weights 12 can be easily released.
[0041]
As mentioned above, although each embodiment of the lock release device of the elevator tie-down apparatus which concerns on this invention was described in detail, this invention is not limited by each said embodiment, Various changes are possible. Needless to say.
For example, in each of the above-described embodiments, the hydraulic jack is constituted by the cylinder body and the ram.
[0042]
【The invention's effect】
As is apparent from the above description, since the present invention arranges the jack extending horizontally between the stopper and the sheave support, a vertical gap between the stopper and the sheave support is provided. Even if is small, it is possible to easily release the engagement of the tensioner support to the guide rail by pushing down the tensioner support.
[Brief description of the drawings]
FIG. 1 is a front view showing an elevator tie-down device equipped with a lock release device according to a first embodiment.
FIG. 2 is a side view showing an elevator tie-down device to which the unlocking device of the first embodiment is mounted.
FIG. 3 is a front view showing the lock release device of the first embodiment.
FIG. 4 is an essential part cutaway plan view showing the lock release device of the first embodiment.
FIG. 5 is a front view showing a lock release device according to a second embodiment.
FIG. 6 is an essential part cutaway plan view showing the lock release device of the second embodiment.
FIG. 7 is a front view showing a lock release device according to a third embodiment.
FIG. 8 is a front view showing a lock release device according to a fourth embodiment.
FIG. 9 is a diagram schematically showing an elevator provided with a tie-down device.
FIG. 10 is an enlarged side view showing the tie-down device shown in FIG. 9;
FIG. 11 is an enlarged view showing a lock unit shown in FIG. 11;
FIG. 12 is a front view schematically showing a conventional lock release device.
[Explanation of symbols]
1 Main sheave
2 basket
3 counterweight
4 Compensation rope
5 Tie-down device
6 Guide rail
7 Support frame
8 Tensioner
9 Tie-down spring
10 rod
11 Frame holding plate
12 weights (support)
13 Bracket
14 pin
15 arm
16 roller (friction engagement member)
17 Shock absorbing spring
18 Stopper
19 Hydraulic jack
20 Lock release device of first embodiment
21 Stopper
22 cylinder body
23 ram
24 Piping
30 Lock release device of second embodiment
31 Stopper
32 Eccentric cam (cam member)
33 horizontal rotation axis
34 Swing arm
35 spindle
36 cylinder body
37 ram
38 Piping
40 Lock release device of third embodiment
41 Stopper
42 cylinder body
43 ram
44 Sliding member
45 piping
50 Lock Release Device of Fourth Embodiment
51 Stopper
52 cylinder body
53 ram
54 wedge-shaped member
55 piping

Claims (5)

A compensating rope hanging between the elevator car and the counterweight is wound around a tension pulley provided at the lower portion of the hoistway, and in the case of an emergency, the support of the tension pulley and a guide rail for guiding the lifting and lowering are provided. Locking the support to the guide rail in a tie-down device that prevents the upward displacement of the support by locking the support to the guide rail by engaging a frictional engagement member therebetween. Device for canceling,
A jack for pushing down the support,
A cylinder body held by a stopper fixed to the upper part of the guide rail,
A ram that protrudes downward from the cylinder body and presses down the support when pressure fluid is supplied to the cylinder body,
An unlocking device for an elevator tie-down device, comprising: The lock release device for an elevator tie-down device according to claim 1, wherein the cylinder body and the ram form a fluid pressure buffer that buffers upward displacement of the support. A compensating rope hanging between the elevator car and the counterweight is wound around a tension pulley provided at the lower portion of the hoistway, and in the case of an emergency, the support of the tension pulley and a guide rail for guiding the lifting and lowering are provided. Locking the support to the guide rail in a tie-down device that prevents the upward displacement of the support by locking the support to the guide rail by engaging a frictional engagement member therebetween. Device for canceling,
A cam member having a cam surface rotatably supported by a stopper fixed to an upper portion of the guide rail and abutting on the support,
Rotating means for rotating the cam member;
An unlocking device for an elevator tie-down device, comprising: A compensating rope hanging between the elevator car and the counterweight is wound around a tension pulley provided at the lower portion of the hoistway, and in the case of an emergency, the support of the tension pulley and a guide rail for guiding the lifting and lowering are provided. Locking the support to the guide rail in a tie-down device that prevents the upward displacement of the support by locking the support to the guide rail by engaging a frictional engagement member therebetween. Device for canceling,
A stopper fixed to an upper portion of the guide rail, having a pair of left and right stopper-side inclined surfaces inclined downward and divergent toward each other while facing the support body in the up-down direction,
A cylinder body horizontally supported on the support,
A pair of left and right rams projecting horizontally from the cylinder body when a pressure fluid is supplied,
Sliding members respectively attached to the pair of left and right rams, each having a sliding surface that slides on a pair of left and right stopper side inclined surfaces of the stopper,
An unlocking device for an elevator tie-down device, comprising: The sliding member includes a pair of left and right stopper-side inclined surfaces of the stopper, and left and right formed on the support body so as to incline upward and divergently upward while opposing the stopper-side inclined surfaces in the vertical direction. The unlocking device for an elevator tie-down device according to claim 4, wherein the device is formed as a wedge-shaped member inserted between the pair of support-side inclined surfaces.

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