JP3470801B2 - Hanging equipment swing steady rest device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swinging tool steady rest device for a crane such as a container crane in which a lifting tool is suspended by a trolley via a wire rope so as to be lifted and lowered.

[0002]

2. Description of the Related Art For example, a container crane, as shown in FIG. 5, has a gantry 2 installed on a quay 1, a pedestal 2 horizontally supported by an upper end of the gantry 2 and extending in the front-rear direction, and a tip portion (boom).
A girder 3 configured to allow undulation of 3a, a trolley 4 supported by a traverse rail 3b provided on the girder 3 and traversing in the front-rear direction, and a trolley 4 that can be lifted and lowered via a wire rope 5 for lifting a lifting tool. A suspended hanger (spreader) 6 is provided, and a container 8 between a container ship 7 moored on the quay 1 and a predetermined place on the quay 1 is operated by a traverse operation of the trolley 4 and an elevating operation of the hanger 6. It is configured so that the loading and unloading work (cargo handling work) can be performed.

In such a container crane, the traverse speed of the trolley 4 is suddenly changed, the container 8 transferred by the hanger 6 is affected by external disturbance such as wind, and the center of gravity of the load in the container 8 is changed. There is a case where swinging shake (skew shake) occurs in the hanger 6 due to imbalance and the like, and it is difficult to efficiently carry out cargo handling work.

Therefore, in order to solve such a problem, the inventor of the present invention, as shown in FIGS. 6 and 7 , can prevent swing swing of the suspending tool 6 as much as possible. Developed 10.

That is, the swinging steady rest 10 of this suspension device
In this case, as shown in FIG. 6 , a pair of left and right sheave carts 12a for supporting a plurality of sheaves 11 each around which a wire rope 5 for lifting lifting equipment (see FIG. 5 ) is wound around the trolley 4 .
12b is provided so as to be reciprocally movable in the traverse direction (front-back direction) of the trolley. Both sheave carts 12a and 12b are trolley 4
Rails 4a, 4b provided at the left and right ends of the rail and extending in the front-rear direction
It is supported by and can reciprocate in the transverse direction of the trolley. The sheave carriage 12a on the right side (the upper side in FIG. 6 ) rotatably supports a plurality of sheaves 11 around which a wire rope for lifting a lifting tool that suspends and supports the right end portion of the lifting tool 6 is wound. (Lower side in the figure)
A plurality of sheaves 1 around which a wire rope for lifting a lifting tool that suspends and supports the left end portion of the lifting tool 6 is wound around the sheave carriage 12b.
1 is rotatably supported.

With such a construction, in the state where both sheave carriages 12a, 12b are positioned at the neutral position (the position shown by the solid line in FIG. 6 ) which directly opposes each other without causing the displacement in the front-rear direction, the suspending tool is provided. 6 is located at an appropriate position (position indicated by a broken line in the figure) that is not biased in the front-rear direction and the left-right direction, but by moving both sheave carts 12a and 12b from the neutral position in the opposite direction, the hanger 6 swings. Forces F and f can be applied. That is, the sheave cart 1 on the right side
When 2a is moved from the neutral position to the front (to the left in FIG. 6 ) and the left sheave carriage 12b is moved to the rear (to the right in the same figure) from the neutral position, the suspension is performed as shown by the alternate long and short dash line in FIG. The tool 6 has a turning force (hereinafter, "counterclockwise turning force") for turning the tool 6 from the proper position in the counterclockwise direction.
That is, when the right sheave carriage 12a is moved rearward from the neutral position and the left sheave carriage 12b is moved forward, as shown by a chain double-dashed line in FIG. A swinging force (hereinafter, referred to as “clockwise swinging force”) f for rotating the suspending tool 6 from the proper position in the clockwise direction is applied. Therefore, the hanger 6
When a turning shake is generated in the sheave bogies 12a and 12b, a turning force F, f in the opposite direction to the turning shake is applied.
By moving the hook in the opposite direction, swinging swing of the hanger 6 can be prevented, and the above-mentioned problem does not occur.

In order to prevent such swinging swing of the suspension 6, the sheave carriage moving means for moving both sheave carriages 12a and 12b in opposite directions at the same speed and at the same amount at the same time is provided. The inventor initially devised a sheave carriage moving means for moving the sheave carriages 12a and 12b in opposite directions by separate drive motors. However, depending on the sheave carriage moving means, both drive motors may be used. It is difficult to synchronize the two sheave carriages 12a, 12
Since the movement of b could not be started at the same time, the swing runout could not be effectively prevented.

Therefore, the inventor of the present invention examined a rope-connecting type sheave carriage moving means 13 for causing both sheave carriages 12a and 12b to travel in opposite directions by a single drive motor 14 as shown in FIG .

That is, this sheave cart moving means 13
Is a forward / reverse rotation motor 14 as one drive motor installed between the sheave carriages 12a and 12b, a winding drum 15 attached to the output shaft of the forward / reverse rotation motor 14, and one end of each winding is wound around the winding drum 15. And the other ends of the sheave carriages 12a and 12b are connected to the rear ends of the wire ropes 16a and 16b, and the sheave carriages 12a and 12b.
It consists of a wire rope 16c that connects the front end portions of the wire ropes and a guide roller 17 that guides the wire ropes 16a, 16b, and 16c. By rotating the winding drum 15 in the forward and reverse directions, the sheave carriages 12a and 12b move in opposite directions. At the same time, the same amount is moved at the same amount.
That is, when the winding drum 15 is rotated in the normal direction, one wire rope 16a is wound up, as shown by the chain double-dashed line in FIG. 7 , and the right sheave carriage 12a connected to this is wound to the neutral position (see FIG. 6 and 7 ) (the position indicated by the solid line in FIG. 7 ), and at the same time, the sheave carriage 12b on the left side is connected to the sheave carriage 12a via the wire rope 16c.
Can be moved forward at the same speed and by the same amount, and a clockwise turning force f can be applied to the hanger 6. On the contrary, when the winding drum 15 is rotated in the reverse direction, as shown by the alternate long and short dash line in FIG.
The other wire rope 16b is wound up, and the left sheave carriage 12b connected to the wire rope 16b is moved rearward from the neutral position, and at the same time, the wire rope 1 is attached to the sheave carriage 12b.
The right sheave cart 12a connected via 6c can be moved forward at the same speed and by the same amount, and the counterclockwise turning force F can be applied to the hanger 6.

Therefore, according to the hoisting tool swing steadying device 10 having the sheave carriage moving means 13 having the above-mentioned structure, when the hoisting tool 6 is swung in the counterclockwise direction as shown by the one-dot chain line in FIG. Can rotate the take-up drum 15 in the forward direction and apply the clockwise turning force f to the hanger 6, thereby suppressing or preventing the turning shake of the hanger 6. Conversely, the hanger 6
In the case where the clockwise swinging as shown by the two-dot chain line in FIG. 6 occurs, the winding drum 15 is reversed to apply the counterclockwise swinging force F to the suspending tool 6, thereby It is possible to suppress and prevent swing runout.

[0011]

However, as shown in FIG. 6 and FIG.
The hanging tool swing steadying device 10 shown in FIG. 2 is theoretically capable of effectively preventing the swinging run of the lifting tool 6 as described above, but since the following problems occur,
It was completely unusable.

That is, the movement of both sheave carriages 12a, 12b is controlled by the wire ropes 16a, 16b, which are flexible members.
Since it is performed by the tension of 16c, the wire ropes 16a, 16b, 16c are stretched, the simultaneous movement is not properly performed, and a good swing steadying function cannot be exerted for a long period of time. That is, wire rope 1
Since the movement timings of both sheave carriages 12a and 12b are slightly deviated by the amount that 6a, 16b, and 16c are loosened due to expansion, it is difficult to perform precise and time-constrained turning steady rest control as planned. Therefore, it is necessary to provide a tension mechanism that absorbs the elongation of the wire ropes 16a, 16b, 16c, and the trolley 4 becomes large. Further, if such a tension mechanism is provided, not only is it difficult to adjust the tension by the tension mechanism, but even if it is possible, first, the absolute positions of the sheave carriages 12a and 12b (reference positions in the trolley 4) are set to the time. It is unavoidable that the twist lock pin of the spreader 6 shifts from the hole of the corner fitting of the container (usually, if the runout stops, the twist lock pin of the spreader 6 of the container 8) Should fit the holes in the corner fittings). Both sheave carts 12a, 12
If b is displaced in the front-rear direction, the trolley 4 and spreader 6
Therefore, the relative position with respect to each other is deviated, which hinders a separately provided transverse positioning control device and transverse steady rest control. In addition to this problem, the displacement amount of both sheave carriages from the absolute position changes, so an extra movement space for this displacement amount is required on the trolley 4, and the size of the trolley 4 is further increased, and It is necessary to periodically adjust the length of the wire rope to correct the amount of deviation.

One sheave carriage 12a (or 12b) is directly moved by the wire rope winding action of the winding drum 15, while the other sheave carriage 12b (or 12a) is moved through the wire rope 16c. The sheave cart 12a (or 12b) is towed. Since the sheave cart 12a (or 12b) is moved by the movement of the sheave cart 12a (or 12b), the other sheave cart 12b (or 12a) is pulled by the wire rope 16c.
There are further areas of wire rope means (wire ropes 16a, 16b arranged on the rear side of the movement area and wire ropes 16c arranged on the front side thereof) on both sides of the movement area of 12b, and the above-mentioned problem is added thereto. The installation space of the sheave cart moving means 13 becomes large, and the trolley 4 becomes large as a whole. As a result, the entire crane including the girder 3 supporting the crane is unnecessarily enlarged, which is a practical problem.

The present invention solves the above-mentioned problems in the conventional device and provides a practical swinging steady rest device capable of effectively preventing swinging swinging of the suspension.

[0015]

SUMMARY OF THE INVENTION A lifting device swing steadying apparatus according to the present invention which solves this problem is a pair of left and right supporting a sheave having a wire rope for lifting a lifting device wound around a trolley traversing in the front-rear direction. The sheave trolley is reciprocally movable in the traverse direction of the trolley, and the sheave trolley moving means for moving the sheave trolley in the opposite direction is interposed between the trolley and both sheave trolleys. carriage moving means, I der those and an output conversion mechanism consisting of only a rigid member for converting a driving source and its output to the moving force of the sheaves truck, specifically (1) or Of (2)
Is configured as follows. (1) The drive source is a forward / reverse rotation motor
Yes, the output conversion mechanism is provided on each sheave cart.
Provided on the nut member and trolley and screwed to each nut member
Screw shaft inserted, both screw shafts and output shaft of forward / reverse rotation motor
And a power transmission mechanism for interlocking connection with
This power transmission mechanism is rotatably supported on the trolley.
Forward and reverse with the transmission shaft extending in the left-right direction and the middle part of the transmission shaft
Bevel gear that interlocks with the motor output shaft and transmission shaft
Bevel gears that connect both ends of the
It is equipped with a forward / reverse rotation motor for normal rotation or reverse rotation.
By driving both sheave carts in the opposite direction at the same speed
It is configured to move the same amount each time. (2) The drive
The power source is a hydraulic cylinder and the output conversion mechanism is a link structure.
The central part is swingably supported on the trolley.
Arm and connected case provided on each sheave cart
And a pin connected to each end of the arm for horizontal rotation.
Move the rider and slider to each connecting case for sheave dolly
Support horizontally slidable only in the direction orthogonal to the direction
It is equipped with a plurality of rollers.
By swinging by expanding and contracting the connected hydraulic cylinders
Move both sheave carts in opposite directions at the same speed and the same amount.
To be configured.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The configuration of the present invention will be described below with reference to FIGS.
Specific description will be made based on the respective embodiments shown in FIG.

[0017] Figures 1 and 2 show a first embodiment, FIGS. 3 and 4 Ru Tei shows a second embodiment.
Each of these embodiments relates to an example in which the present invention is applied to a hoisting tool swinging steady rest device for preventing swinging whistling of the hoisting tool 6 in the container crane shown in FIG. In the following description, front and rear refer to left and right in FIGS . 1 to 4 , and left and right refer to lower and upper in FIGS .

The hanging tool swing steadying device (hereinafter referred to as "first swing steadying device") 10a in the first embodiment.
In addition, in the lifting device swing steady rest (hereinafter referred to as “second swing steady rest” ) 10c in the second embodiment, as shown in FIGS . 1 to 4 , a pair of left and right sheave carriages 12a, 12b is supported by the trolley 4 so as to be reciprocally movable in the front-rear direction. This configuration is the same as that shown in FIG. 6 , and the sheave cart 12a on the right side is supported by the rail 4a provided at the right end portion of the trolley 4, and the right end portion of the lifting tool 6 (see FIGS . 5 and 6 ) . A plurality of sheaves 11 around which a wire rope for raising and lowering a hoisting tool that suspends is rotatably supported, and a sheave carriage 12b on the left side is supported by a rail 4a provided at a left end portion of the trolley 4, A plurality of sheaves 11 around which a wire rope for lifting and lowering a lifting tool that suspends and supports the left end of the lifting tool 6 are wound are rotatably supported.

Further, each turning steady rest10a, 10
cThen,Figure 4As shown in Figure 1, both sheave carts 1
Reverse both sheave carts between 2a, 12b and trolley 4.
Sheave cart moving means to move toward13a, 13cGasuke
Each sheave trolley transportation means13a, 13c
Is one driving source14a, 14cAnd its output each sheave
Is it only a rigid member that converts the moving force of the dolly 12a, 12b?
And an output conversion mechanism.

That is, in the sheave carriage moving means 13a of the first turning steady rest 10a, as shown in FIGS. 1 and 2, the drive source is the forward / reverse rotation motor 14a and the output converting mechanism is the respective sheave carriage. Nut members 20a, 20b provided on 12a, 12b and an appropriate number of bearings 2 on the trolley 4.
It is rotatably supported by 2 and extends in the front-back direction.
Screw shaft 2 threadedly inserted into each nut member 20a, 20b
1a, 21b, the power transmission mechanism 2 for interlockingly connecting the two screw shafts 21a, 21b and the output shaft 24 of the forward / reverse rotation motor 14a.
5, 26, 27, 28, 29, 30, 31.

Both nut members 20a, 20b and screw shaft 2
1a and 21b are common members having the same screw form such as a screw direction and a screw pitch.
By rotating 21b in the opposite direction at the same speed, both sheave carriages 12a, 12b are moved in the opposite direction at the same speed and by the same amount.

The power transmission mechanism includes a transmission shaft 25 extending in the left-right direction, bevel gears 26 and 27 interlockingly connecting an intermediate portion of the transmission shaft 25 and the output shaft 24 of the forward / reverse rotation motor 14a, and a right end portion of the transmission shaft 25. The bevel gears 28 and 29 are interlockingly connected to the rear end of one screw shaft 21a, and the bevel gears 30 and 31 are interlockingly connected to the left end of the transmission shaft 25 and the rear end of the other screw shaft 21b. The meshing form of 28 and 29 and the meshing form of bevel gears 30 and 31 are set so that both screw shafts 21a and 21b are rotated in the opposite directions by the rotation of the transmission shaft 25. The transmission shaft 25 includes a proper number of bearings 32 and bevel gears 26, 27, 28, 2
Gear boxes 33, 34, 3 for housing 9, 30, 31
It is rotatably supported by the trolley 4 by 5.

Thus, when the sheave carriages 12a and 12b are located in the neutral position (position shown by the solid line in FIG. 1) in which they directly oppose each other without any displacement in the front-rear direction, the suspending tool 6 is in the front-rear direction. proper position (figures and not biased in the lateral direction
6 is indicated by a broken line). When the forward / reverse rotation motor 14a is driven in the forward direction from this state, the transmission shaft 2
Both screw shafts 21a and 21b are rotated in the opposite directions via 5, so that the right sheave carriage 12a is moved forward and the left sheave carriage 12b is moved rearward, as shown by the solid line in FIG. . At this time, both sheave carts 12a, 12
The moving speed and the moving amount of b are the same. Therefore, by driving the forward / reverse rotation motor 14a to rotate forward,
A counterclockwise turning force F for turning this in a counterclockwise direction as shown by the one-dot chain line in FIG .
On the other hand, when the forward / reverse rotation motor 14a is driven in the reverse direction, both screw shafts 21a and 21b are rotated in the opposite directions via the transmission shaft 25, and as shown by the chain line in FIG.
Is moved rearward, and the sheave cart 12b on the left side is moved forward at the same speed and by the same amount.
As shown by the chain double-dashed line in FIG. 6 , a clockwise turning force f for turning clockwise is applied.

Therefore, the first turning steady rest 10a
According to the above, when the hoisting tool 6 swings in the counterclockwise direction (counterclockwise direction in FIG. 2), the forward / reverse rotation motor 14a is rotated.
By reversely driving and applying a clockwise turning force f to the hanger 6, it is possible to suppress and prevent the turning shake of the hanger 6. Further, when the swinging motion of the hanging tool 6 in the clockwise direction (clockwise direction in FIG. 2) occurs, the forward / reverse rotation motor 14a
By rotating the hook 6 in the normal direction and applying the counterclockwise turning force F to the hanger 6, it is possible to suppress or prevent the turning shake of the hanger 6.

In the first turning steady rest 10a, the output converting mechanism for converting the output of the drive source (forward / reverse rotation motor) 14a into the moving force of each sheave carriage 12a, 12b is a rigid member (nut member 20a). , 20b, screw shaft 21
a, 21b, transmission shaft 25, and bevel gears 26, 27, 2
8, 29, 30, 31), only the simultaneous movement is properly performed unlike the conventional device using the flexible member (wire rope), and the steady rest control is stable for a long period of time. It can be performed. Further, unlike the conventional device, there is no need for means (wire rope 16c) for connecting the sheave carriages 12a, 12b to each other for mutual pulling, a wire rope tensioning device (tension mechanism) is not required, and the sheave carriage is not displaced. Therefore, the installation space of the sheave carriage moving means 13a is reduced, and the trolley 4 is downsized. As a result, the entire crane including the girder 3 supporting the crane can be downsized.

When the trolley 4 is suddenly accelerated or decelerated due to its start, stop, etc., both sheave carriages 12a, 12b.
A large inertial force acts to move the motor in the same direction (forward or backward).
No load acts on the motor 4, and the durability of the forward / reverse rotation motor 14a can be improved. Both sheave cart 12
When a force that moves them in the same direction acts on a and 12b, a rotational force in the opposite direction acts on the screw shafts 21a and 21b via the nut members 20a and 20b. As a result, a rotational force in the opposite direction is applied to both ends of the transmission shaft 25, and the rotation of the transmission shaft 25 is blocked. Therefore, no rotational force is transmitted from the screw shafts 21a and 21b to the output shaft 24 via the transmission shaft 25, and no load acts on the output shaft 24.

[0027]

[0028]

[0029]

Further, in the sheave carriage moving means 13c of the second turning steady rest 10c, as shown in FIGS. 3 and 4 , the drive source is the hydraulic cylinder 14c and the output converting mechanism has a link structure. There is.

That is, the output converting mechanism includes an arm 42 pivotably supported at the intermediate portion by the trolley 4 and a connecting case 43 provided on each of the sheave carriages 12a and 12b.
A slider 47 is horizontally rotatably connected to a pin 46 at each end of the arm 42, and a slider 47 is horizontally slidable in each connection case 43 only in a direction (horizontal direction) orthogonal to the moving direction of the sheave carriages 12a and 12b. A plurality of rollers 48 for supporting the arm 42 are connected to the arm 42.
By swinging the hydraulic cylinder 14c by expansion and contraction, both sheave carriages 12a and 12b are moved in opposite directions at the same speed and by the same amount. The hydraulic cylinder 14c is pivotally supported by the trolley 4 so as to be swingable.

According to the second swing steadying device 10c, as in the case of the first swing steadying device 10a, when the swing swing in the clockwise direction as shown by the chain double-dashed line in FIG. By extending the hydraulic cylinder 14c to move both sheave carriages 12a and 12b from the neutral position shown in FIG. 3 to the position shown by the solid line in FIG. 4 , a counterclockwise turning force F is applied to the hanger 6. Thus, the swinging steady rest of the hanging tool 6 can be performed. Further, in the case where counterclockwise swinging as shown by the alternate long and short dash line in FIG. 6 occurs in the hanger 6, the hydraulic cylinder 14c is contracted to move the sheave carriages 12a, 12b.
By moving b from the neutral position to the position shown by the chain line in FIG. 4 , it is possible to apply a clockwise turning force f to the hanging tool 6 and to prevent the hanging tool 6 from turning. Even in the second turning steady rest 10c, the same effect as that of the first turning steady rest 10a can be obtained structurally. That is, since the output converting mechanism is composed of only the rigid member, simultaneous movement is properly performed, and stable steady rest control can be performed for a long period of time. In addition, the installation space of the sheave carriage moving means 13c becomes small, the entire crane including the trolley 4 and the girder 3 supporting the trolley 4 can be downsized, and both sheave carriages 12a and 12b.
The large inertial force due to the acceleration / deceleration of the trolley 4 for moving the trolley 4 in the same direction is canceled by the arm 42, so that no load acts on the hydraulic cylinder 14c.

The present invention is not limited to the above-described embodiments, but can be appropriately improved and changed without departing from the basic principle of the present invention, and particularly the output conversion mechanism is constituted. bevel gear unit (Fig. 1) or for the link means (FIG. 3), it is possible to adopt various forms that can be conceived by those skilled in the art based on known techniques or this. Further, the present invention can be suitably applied to bridge cranes other than the container cranes described above, other cranes, etc., and it does not matter whether the trolley 4 is a self-propelled type.

[0034]

As can be understood from the above description, according to the hoisting tool swinging steady rest of the present invention, it is possible to effectively prevent the hoisting tool swinging without causing a problem in the conventional apparatus. Therefore, crane work (cargo handling work) such as container crane can be performed extremely efficiently.

[Brief description of drawings]

FIG. 1 is a plan view showing a hanging tool swing steady rest according to a first embodiment.

FIG. 2 is a plan view corresponding to FIG. 1 showing an operation state different from FIG.

FIG. 3 is a plan view showing a lifting tool swing steady rest according to a second embodiment.

FIG. 4 is a plan view corresponding to FIG. 3 showing an operation state different from that in FIG.

FIG. 5 is a side view showing an example of a container crane.

[Fig. 6] Anti-sway action of lifting gear swing by movement of sheave cart
3 is a plan view showing the basic principle of FIG.

FIG. 7 is a plan view showing a conventional device.

[Explanation of symbols]

4 ... trolley, 5 ... wire rope for lifting lifting equipment, 6 ... lifting material,
10a, 10c ... suspender turning steady rest apparatus, 11 ... sheave, 12a, 12b ... sheave carriage, 13a, 13c ... sheave carriage moving means, 14 a ... forward and reverse motor (driving source),
14c ... hydraulic cylinder (driving source), 20a, 20b ... nut member (output conversion mechanism), 21a, 21b ... screw shaft (output conversion mechanism), 24 ... output shaft, 25 ... transmission shaft (output conversion mechanism, power transmission mechanism) ), 26, 27, 28, 29,
30, 31 ... Bevel gear (output conversion mechanism, power transmission mechanism) , 42 ... Arm (output conversion mechanism), 47 ... Slider (output conversion mechanism).

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B66C 13/08 B66C 13/22

Claims (2)

(57) [Claims] 1. A pair of right and left sheave carriages supporting a sheave around which a wire rope for lifting a lifting device is wound are provided on a trolley traversing in the front-rear direction so as to be reciprocally movable in the traverse direction of the trolley, and the trolley and both sheaves. A sheave carriage moving means for moving both sheave carriages in opposite directions is interposed between the carriage and the sheave carriage moving means, and the sheave carriage moving means converts one drive source and its output into a moving force of each sheave carriage. Lifting tool swing steady rest composed of an output conversion mechanism consisting of only members
A device, wherein the drive source is a forward / reverse rotation motor, and the output conversion mechanism is a nut provided on each sheave carriage.
Member and threadedly inserted into each nut member provided on the trolley
Connected screw shaft, both screw shafts, and the output shaft of the forward / reverse rotation motor.
And a power transmission mechanism for dynamically connecting the power transmission mechanism. The power transmission mechanism is rotatably supported by the trolley.
The transmission shaft extending to the right, the middle part of the transmission shaft, and the forward / reverse rotation mode.
Both the transmission shaft and the bevel gear that connects the output shaft of the
Equipped with a bevel gear that connects the ends to each screw shaft
By driving the forward / reverse rotation motor in the forward or reverse direction.
Move both sheave carts in opposite directions at the same speed and the same amount.
The swinging steady rest device is characterized in that it is configured as described above . 2. A lifting trolley is lifted on a trolley that traverses in the front-back direction.
Left and right supporting the sheave around which the wire rope for
A pair of sheave carts are installed so that they can reciprocate in the traverse direction of the trolley.
While shedding, both sheaves are placed between the trolley and both sheave carts.
The sheave trolley moving means for moving the trolley in the opposite direction is installed.
As a result, the sheave trolley transportation means has one drive source and its output.
From a rigid member that converts force into the moving force of each sheave cart
Slewing steady rest configured with the output conversion mechanism
A device, wherein the drive source is a hydraulic cylinder, the output conversion mechanism has a link structure, and an intermediate portion
Arm pivotally supported on the trolley and each sheave base
The connection case provided on the car and the horizontal rotation on each end of the arm
A slider that is rotatably connected to a pin and a slide
Only drive the rider in the direction orthogonal to the direction of movement of the sheave truck.
Also includes a plurality of rollers for supporting flat slidably
The swing of the hydraulic cylinder with the arm connected to it causes it to swing
Both sheave trucks at the same speed in opposite directions.
Characterized by being configured to move the same amount
That suspender turning steady rest.