WO2015121940A1

WO2015121940A1 - Tie-down device

Info

Publication number: WO2015121940A1
Application number: PCT/JP2014/053297
Authority: WO
Inventors: 中山　徹也; 薫平野; 雄大田中
Original assignee: 株式会社日立製作所
Priority date: 2014-02-13
Filing date: 2014-02-13
Publication date: 2015-08-20
Also published as: JPWO2015121940A1; CN105873845A; CN105873845B; JP6154033B2

Abstract

[Problem] To provide a tie-down device that can simplify recovery work after operation. [Solution] Provided is a tie-down device that restricts movement of a compensation pulley, around which a compensation rope connecting an elevator car and a counterweight is wound, in the direction that the compensation pulley bounces, wherein the tie-down device is provided with: a casing that is disposed along a compensation rail so as to be able to move in the vertical direction and that has an internal space having an inclined face that opens wider toward the top; a wedge that is disposed between the compensation rail and the inclined face in the internal space of the casing and that frictionally engages with the compensation rail along with the upward movement of the casing; and a casing moving mechanism that moves the casing in a press-down direction relative to the wedge in accordance with an external force.

Description

Tie-down device

The present invention relates to a tie-down device, and is particularly suitable for application to an elevator in which the lower surface of a car and the lower surface of a counterweight are connected by a compen- sion rope.

Conventionally, in this type of elevator, in order to apply tension to the compen- sion rope, the compen- sion rope is wound around a pulley called a compen- sion pulley having a certain weight disposed at the bottom of the hoistway. In this case, the compensation pulley is supported so as to be movable in the vertical direction along the compensation rail that is vertically planted at the bottom of the hoistway.

In an elevator having such a structure, when the car or the counterweight suddenly stops due to an emergency stop operation or a buffer collision, the compensation rope is pulled up due to inertia and the compensation pulley jumps up, and the raised compensation pulley falls. In order to suppress damage at the time, a tie-down device for restricting upward movement of the compensator pulley is disposed above the compensator pulley.

The tie-down device includes a pair of wedge-shaped wedges arranged so as to face each other via a compensator rail, and a tie-down housing provided with an inverted trapezoidal internal space having an inclined surface having the same inclination angle as the wedge. It is configured with.

When the compensation pulley is flipped up, the compensation pulley collides with the tie-down housing, so that the tie-down housing is lifted upward, and as a result, a wedge fits into the internal space of the tie-down housing. Due to the wedge effect, the two wedges sandwich the compensator rail, and these wedges are in frictional engagement with the compensator rail and braking force is generated on the wedge and tie-down housing. Can be regulated.

Regarding such a tie-down device, Patent Document 1 discloses that when a tie-down device receives an upward force due to a sudden stop, the tie-down device is quickly restrained by a compensator by the action of a wedge. .

JP 2007-84290 A

By the way, when the tie-down device is operated, the wedge fits firmly into the interior space of the tie-down housing, and in order to release it, a hydraulic jack or crane is required, and there is a problem that restoration work becomes large. It was.

The present invention has been made in consideration of the above points, and intends to propose a tie-down device that can facilitate recovery work after operation.

In order to solve such a problem, in the present invention, in a tie-down device that regulates the movement of a compensator pulley around which a compo rope for connecting an elevator car and a counterweight is wound, the tie-down device moves up and down along the compensator rail. A housing having an inner space having an inclined surface that is freely arranged and widens toward the top, and is disposed between the compensator and the inclined surface in the inner space of the housing; A wedge that frictionally engages the compensator as it moves in the direction and a housing moving mechanism that moves the housing in a direction that pushes the housing relative to the wedge in response to an external force are provided.

According to the present invention, it is possible to easily release the wedge fitted below the inner space of the housing without using a hydraulic jack or crane as in the existing tie-down device, and thus recovery after operation. A tie-down device that can facilitate the work can be realized.

It is a basic diagram which shows schematic structure of an elevator. It is a side view which shows the structure of the tie-down apparatus by 1st Embodiment. It is a top view which shows the structure of the tie-down apparatus by 1st Embodiment. It is a front view which shows the schematic structure of the tie-down apparatus by 1st Embodiment, taking a partial cross section. It is a side view which shows the state at the time of operation | movement of the tie-down apparatus by 1st Embodiment. It is a side view which shows the structure of the tie-down apparatus by 2nd Embodiment. It is a side view which shows the structure of the tie-down apparatus by 3rd Embodiment.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) 1st Embodiment In FIG. 1, 1 shows the elevator by this Embodiment as a whole. The elevator 1 includes a car 5 and a counterweight 6 that are suspended in a suspending manner by a main rope 4 wound around a sheave 2 of a hoisting machine and a deflecting wheel 3.

The car 5 is provided with an emergency stop device 7 that forcibly stops the car 5 when the raising / lowering speed of the car 5 exceeds a specified value. Further, shock absorbers 9 and 10 are provided at positions facing the car 5 and the counterweight 6 at the bottom of the hoistway 8 so as to alleviate the impact when the car 5 and the counterweight 6 are dropped. .

Furthermore, the lower part of the car 5 and the lower part of the counterweight 6 are connected by a compen- sion rope 11. The compensation rope 11 is wound around the compensation pulley 12 at the bottom of the hoistway 8, and the compensation pulley 12 is supported by a compensation rail 13 planted perpendicularly to the bottom of the hoistway 8 so as to be movable in the vertical direction. .

The compensator rail 13 is a rail having a T-shaped xy section, and is arranged in the direction of the arrow x and the opposite direction (hereinafter referred to as the left-right direction) so that the rail sliding portion 13A faces the bottom of the hoistway 8. (See Fig. 3). A tie-down device 14 that restricts upward movement of the compensation pulley 12 is provided above the compensation pulley 12 in the compensation rail 13.

2 to 4, the tie-down device 14 includes a tie-down housing 20 disposed between the compensator rails 13 and a pair of wedges 21.

The tie-down housing 20 is provided with groove portions 20A that are slightly wider than the rail sliding portions 13A of the compensator rail 13 on the upper surface and the lower surface, respectively, and the tip end portions of the corresponding rail sliding portions 13A of the compensator rail 13 are the groove portions. 20A. As a result, the tie-down housing 20 can freely move in the vertical direction along the rail sliding portion 13A of the compensator rail 13.

In addition, the tie-down housing 20 has an inverted trapezoidal internal space 20B having a pair of inclined surfaces 20BA that expand toward the top when viewed from the left-right direction. A pair of wedges 21 are disposed so as to sandwich the rail sliding portion 13A of the compensator rail 13 at each end in the left-right direction).

The wedge 21 is a plate-like member having an inverted trapezoidal yz cross section, and one surface 21A side frictionally engaging with the rail sliding portion 13A of the compensator rail 13 is formed perpendicular to the upper surface 21C and the lower surface 21D. On the other hand, the other surface 21B side facing the inclined surface 20BA of the tie-down housing 20 is formed as an inclined surface having the same inclination angle as the inclined surface 20BA. A roller 22 is disposed between the other surface 21B of the wedge 21 and the corresponding inclined surface 20BA of the tie-down housing 20.

Further, wedge lower rods 23 are respectively implanted at both ends in the width direction (left and right direction) of the lower surface 21D of the wedge 21. A nut 24 is screwed to the tip of each wedge lower rod 23, and a coil spring 25 that is inserted through the wedge lower rod 23 is disposed between the nut 24 and the tie-down housing 20. . Thus, even when the tie-down device 14 operates and the tie-down housing 20 moves upward due to the downward biasing force applied to the wedge 21 by the coil spring 25 via the nut 24 and the wedge lower rod 23, In order to prevent the wedge 21 from being dragged upward and moving upward, the wedge 21 can always be frictionally engaged with the rail sliding portion 13A of the compensator rail 13 with a certain degree of strength.

Further, at each end of the upper surface 21C of the wedge 21 in the width direction (left and right direction), a wedge upper rod 26 that is threaded is planted so that the tip portion penetrates the upper surface of the tie-down housing 20. Yes. A nut 27 is screwed to the tip of the wedge upper rod 26, and the nut 27 is rotated in a direction to be tightened with respect to the tie-down housing 20, thereby relatively moving the tie-down housing 20 to the wedge 21. It can be moved in the direction approaching.

In the case of the present embodiment, as shown in FIG. 4, a pair of guide shafts 28 penetrating the tie-down housing 20 in the vertical direction are planted in the compensation pulley 12. The jumping direction of the compensation pulley 12 can be regulated so that the jumping up only along the guide shaft 28 in the vertical direction.

In the tie-down device 14 having the above-described configuration, the car 5 or the counterweight 6 is suddenly stopped by the emergency stop operation, the compen- sion rope 11 is pulled up by inertia, and the compensator pulley 12 collides with the tie-down housing 20. When it jumps up, the tie-down housing 20 moves upward due to the collision of the compensation pulley 12.

At this time, the wedge 21 does not move upward because it is frictionally engaged with the rail sliding portion 13A of the compensator rail 13 by an urging force from the coil spring 25 with an appropriate strength. Only move up. As a result, as shown in FIG. 5, the wedge 21 fits in the lower part of the internal space of the tie-down housing 20, and the braking force that firmly holds the rail sliding portion 13 </ b> A of the compensator rail 13 on the wedge 21 due to the wedge effect appear. Due to this braking force, the upward movement of the tie-down housing 20 is stopped, and thereby the upward movement is restricted so that the compensation pulley 12 does not jump up to a higher height. In this state, in the tie-down device 14, the wedge 21 is fitted in a wedge shape in the lower side of the internal space 20 </ b> B of the tie-down housing 20.

After this, when releasing the wedge 21 fitted to the lower side of the internal space 20B of the tie-down housing 20, the nut 27 screwed into each wedge upper rod 26 is rotated in a tightening direction. As a result, the tie-down housing 20 is pushed down with the rotation of the nut 27, and the wedge 21 moves relatively above the internal space 20B of the tie-down housing 20, so that the internal space of the tie-down housing 20 is increased. The wedge 21 fitted to the lower side of 20B is released.

As described above, according to the tie-down device 14 according to the present embodiment, the release of the wedge 21 fitted to the lower side of the internal space 20B of the tie-down housing 20 is tightened with the nut 27 screwed into the wedge upper rod 26. Since it can be performed simply by rotating it in the direction, it can be released with a simple tool, and compared to conventional tie-down devices that require a hydraulic jack or crane for recovery, the recovery work after operation is marked. Can be facilitated.

(2) Second Embodiment FIG. 6, in which parts corresponding to those in FIG. 2 are assigned the same reference numerals, is replaced with a tie-down device 14 (FIGS. 2 to 5) according to the first embodiment. 1 shows a tie-down device 30 according to a second embodiment applied to the elevator 1 described above for 1.

The tie-down device 30 is provided with a screw hole 31AA on the upper surface 31A of the wedge 31, and a bolt 32 is screwed into each screw hole 31AA of the wedge 31 through the tie-down case 20 from above the tie-down case 20. Except for the combination, it is configured in the same manner as the tie-down device 14 (FIG. 2) of the first embodiment.

The wedge 31 is not planted with the wedge upper rod 26 (FIG. 2), and the above-described screw hole 31AA is provided at the planting position of the wedge upper rod 26 in the wedge 21 according to the first embodiment. Except for, the configuration is the same as the wedge 21 (FIG. 2) of the first embodiment.
In this case, the screw hole 31AA has a depth at which the bolt 32 can be further tightened from the state in which at least the wedge 31 is released from the tie-down housing 20 and the head of the bolt 32 is in contact with the upper surface of the tie-down housing 20. Is formed.

In the tie-down device 30 of the present embodiment having the above-described configuration, each bolt 32 is connected to the tie-down housing 20 when releasing the wedge 31 fitted below the internal space 20B of the tie-down housing 20. Rotate in the direction to tighten against. As a result, the tie-down housing 20 is pushed down with the rotation of the bolt 32, and the wedge 31 moves relatively above the internal space 20B of the tie-down housing 20, so that the internal space of the tie-down housing 20 is increased. The wedge 31 fitted to the lower side of 20B is released.

Thus, according to the tie-down device 30 according to the present embodiment, like the tie-down device 14 (FIG. 2) according to the first embodiment, the tie-down device 30 is fitted to the lower side of the internal space 20B of the tie-down housing 20. The wedge 31 can be released simply by rotating the bolt 32 screwed to the wedge 31 in the tightening direction. Therefore, the wedge 31 can be released with a simple tool and requires a hydraulic jack or crane for recovery. Compared with the conventional tie-down device, the recovery work after the operation can be greatly facilitated.

(3) Third Embodiment FIG. 7 in which parts corresponding to those in FIG. 2 are assigned the same reference numerals is replaced with a tie-down device 14 (FIGS. 2 to 5) according to the first embodiment. 1 shows a tie-down device 40 according to a third embodiment applied to the elevator 1 described above for 1.

The tie-down device 40 has a wedge upper rod 26 (FIG. 2) and a wedge lower rod 23 (FIG. 2) that are not provided on the wedge 41, and a bolt 42 is provided at the bottom of the tie-down housing 20. The tie-down device 14 is configured in the same manner as the tie-down device 14 of the first embodiment except for the above points.

In practice, in the tie-down device 40 according to the present embodiment, a total of four nuts 43 from the lower direction are respectively attached to the lower portions of the corresponding nuts 43 tie-down housings 20 fixedly arranged at the bottom of the internal space 20B of the tie-down housing 20. The bolt 42 is fitted. In this case, the positions of the bolts 42 are selected so that the left end or right end of the lower surface 41A of the corresponding wedge 41 and the tip of the screw portion 42A face each other, and are screwed together.

In the tie-down device 40 of the present embodiment having the above-described configuration, each bolt 42 is connected to the tie-down housing 20 when releasing the wedge 41 fitted below the internal space 20B of the tie-down housing 20. Rotate in the direction to tighten against. As a result, the tie-down housing 20 is pushed up by the bolt 42 with the rotation of the bolt 42, and the wedge 41 moves relatively above the internal space 20B of the tie-down housing 20, thereby causing the tie-down housing 20 to move upward. The wedge 41 fitted under the inner space 20B of the 20 is released.

As described above, according to the tie-down device 40 according to the present embodiment, the tie-down device 14 is fitted into the lower side of the internal space 20B of the tie-down housing 20 in the same manner as the tie-down device 14 (FIG. 2) according to the first embodiment. Since the wedge 31 can be released simply by rotating the bolt 42 arranged on the lower side of the tie-down housing 20 in the tightening direction, the wedge 31 can be released with a simple tool, and a hydraulic jack for recovery. Compared with a conventional tie-down device that requires a crane or a crane, recovery work after operation can be greatly facilitated.

(4) Other Embodiments In the first to third embodiments described above, a casing that moves the tie-down casing 20 in a direction to be pushed down relative to the

wedges

21, 31, 41 in response to an external force. The body moving mechanism is configured by the wedge upper rod 26 and the nut 27 (first embodiment), the bolt 32 (second embodiment), or the bolt 42 and the nut 43 (third embodiment). Although the case has been described, the present invention is not limited to this, and various other configurations can be widely applied.

In the first embodiment described above, the case where the coil spring 25 is applied as an elastic member that biases the wedge 21 downward relative to the tie-down housing 20 has been described. The present invention is not limited to this, and various other elastic members such as rubber can be widely applied.

The present invention can be applied to a tie-down device that restricts the movement of a compensator pulley around which a compo rope for connecting an elevator car and a counterweight is wound.

DESCRIPTION OF SYMBOLS 1 ... Elevator, 4 ... Main rope, 5 ... Car, 6 ... Balance weight, 11 ... Compen rope, 12 ... Compen pulley, 13 ... Compen rail, 13A ... Rail sliding part, 14, 30, 40 ... Tie-down device, 20 ... Tie-down housing, 20B ... Internal space, 20BA ... Inclined surface, 21, 31, 41 ... Wedge, 22 ... Roller, 23 ... Wedge lower rod, 24, 27, 43 ... nut, 25 ... coil spring, 26 ... rod on wedge, 32, 42 ... bolt.

Claims

In a tie-down device that regulates the movement of a compensator pulley around which a compen- sion rope for connecting an elevator car and a counterweight is wound,
A housing having an inner space having an inclined surface that is arranged to be movable in the vertical direction along the compensator rail and is widened toward the top,
A wedge that is disposed between the compensation rail and the inclined surface in the internal space of the housing, and frictionally engages with the compensation rail as the housing moves upward.
A tie-down device comprising: a housing moving mechanism that moves the housing in a direction that pushes the housing relatively down with respect to the wedge according to an external force.
The housing moving mechanism is
A rod provided on the upper surface of the wedge such that a screw is provided and a tip portion penetrates the housing;
A nut screwed to the tip of the rod penetrating the upper surface of the housing;
The tie-down device according to claim 1, wherein the external force is a rotational force that rotates the nut in a tightening direction.
The housing moving mechanism is
The tie-down device according to claim 2, further comprising an elastic member that biases the wedge downward relative to the housing.
The housing moving mechanism is
Including a bolt threaded through the housing from above the housing and screwed into the wedge;
The tie-down device according to claim 1, wherein the external force is a rotational force that rotates the bolt in a direction to be screwed into the wedge.
The housing moving mechanism is
A nut disposed at the bottom of the internal space of the housing;
A bolt that passes through the housing from below the housing and is screwed into the nut;
The tie-down device according to claim 1, wherein the external force is a rotational force that rotates the bolt in a direction screwed into the nut.