JPH0710480A - Random wind-up preventing device - Google Patents

Abstract

PURPOSE:To prevent a cord from slacking during pay-out from a wind-up drum. CONSTITUTION:A flat belt 28 paid off from a wind-up drum 44 is led between a one-way roller 55 and a pressing roller 56. The wind-up drum 44 is supported with an rotated by a drive shaft 43. The one-way roller 55 is supported with an auxiliary shaft 58 so as to be rotatable in the pay-off direction. A second sprocket 43b on the drive shaft 43 is coupled with an auxiliary sprocket 58a on the auxiliary shaft 58 by means of a chain 62. The auxiliary sprocket 58a is then coupled to the auxiliary shaft 58 through the intermediary of a friction clutch mechanism 63. Accordingly, during pay-off of the flat belt 28, the flat belt 28 is pulled by the one-way roller 55 so as to be prevented from slacking. The friction clutch mechanism 63 absorbs a difference between the pay-off speed of the flat belt from the wind-up drum 44 and the peripheral speed of the one-way roller 55.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing irregular winding used in, for example, a lifting device used when installing an air conditioner on a ceiling.

[0002]

2. Description of the Related Art Conventionally, for example, an irregular winding prevention device described in Japanese Patent Laid-Open No. 4-53790 is known. This turbulence prevention device uses a wire rope derived from a winch,
It is sandwiched between a tension roller and an idle roller, and when the wire rope is unwound, the idle roller is rotated by a drive motor at a speed slightly faster than the wire rope unwinding speed, and the idle roller drive is stopped when the wire rope is wound. It is supposed to do.

[0003]

However, in the above conventional structure, since the idle roller is rotated by the drive motor at a speed slightly higher than the feeding speed of the wire rope, the idle roller and the wire rope are in sliding contact with each other, and the wire rope However, there is a problem that the life of the wire rope is shortened due to abrasion.

The present invention has been made in view of the above points, and it is possible to prevent the string from being disturbed at the time of unwinding.
An object of the present invention is to provide an irregular winding prevention device that can prevent the life of a cord body from being shortened.

[0005]

A device for preventing irregular winding according to the present invention is connected to a winding drum, which is driven by a drive shaft to rotate forward and backward to wind up a cord, and a friction gear to the drive shaft. The auxiliary shaft and the one-way roller that rotates together with the cord and are rotatably supported by the auxiliary shaft only in the feeding direction of the cord.

[0006]

In the irregular winding prevention apparatus of the present invention, when the cord body is unwound, the one-way roller that rotates together with the cord body is rotationally driven by the auxiliary shaft, and the one-way roller pulls out the cord body, so that the one-way roller is wound around the winding drum. The loosening of the string is prevented. Since the speed difference between the feeding speed from the winding drum and the peripheral speed of the one-way roller is absorbed by the sliding of the friction gear, the one-way roller and the cord body do not make sliding contact. At the time of winding the string, the one-way roller that rotates with the string idles.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the irregular winding prevention apparatus of the present invention will be described below with reference to the drawings.

In FIGS. 2 to 4, reference numeral 11 denotes an installation portion made of a steel frame or the like arranged in a grid inside the ceiling, and four suspension bolts 12 are fixed to the installation portion 11. Each of the hanging bolts 12 is arranged at a corner portion of a quadrangle of a predetermined size, vertically hangs downward, and has a thread groove of a predetermined pitch.

Further, 14 is an air conditioner, and this air conditioner 14
Is a so-called air-conditioning indoor unit (ceiling cassette) having a substantially rectangular parallelepiped shape, and has a pair of mounting brackets 16 formed with grooves 15 through which the hanging bolts 12 are inserted at both ends in the longitudinal direction.
Is provided. In the air conditioner 14, the mounting bolts 16 are inserted into the grooves 15 formed in the mounting brackets 16, and the mounting brackets 16 are sandwiched by upper and lower nuts (not shown) screwed into the hanging bolts 12. It can be installed inside the ceiling by tightening with.

Further, 20 is a hoisting device, and the hoisting device is
Reference numeral 20 denotes a pedestal portion 25 including a first main body portion 21, a second main body portion 22, and a pair of connecting bodies 24, 24 for connecting the main body portions 21 and 22, and two suspension bolts. A pair of front and rear bolt side fixing devices 26, 26 that are detachably fixed to 12
And a remote control device 27 for operation connected to the gantry unit 25, and the like.

The air conditioner 14 is placed on the pedestal portion 25, and the flat belts 28, which are four cords in total, which are led out from the main body portions 21 and 22 two by four, are fixed to the bolt side fixing devices 26 and 26, respectively. By winding the flat belts 28 inside the main body portions 21 and 22 while being hooked on the air conditioner 26, the air conditioner 14 can be lifted together with the pedestal portion 25.

Next, the structure of the mount 25 will be described.

As shown in FIGS. 2 to 6, the first and second main body portions 21 and 22 constituting the pedestal portion 25 each have a substantially rectangular parallelepiped shape, and the mounting for mounting the air conditioner 14 on the upper surface thereof. Face
31 is formed, and three casters 32 that are rotatable and changeable in direction are attached to the lower surface.

Further, on both side portions of each of the main body portions 21 and 22, a connecting body holding metal fitting 34 formed by bending an iron plate or the like is fixed.

Then, between the connecting body holding metal fittings 34 and the respective main body portions 21 and 22, the connecting bodies 24 and 24 as connecting portions having a substantially prismatic shape are slidably fitted to each other. Body 21,
22 are connected to the front and back. In addition, each connector holding metal fitting 34
A pair of upper and lower elongated holes 35, 35 are formed along the longitudinal direction of the connecting body 24, respectively. Then, the first main body 21
With the clearance between the second main body 22 and the second body 22 adjusted appropriately, the plurality of positioning bolts 36 are screwed into the screw holes (not shown) of the coupling bodies 24, 24 through the elongated holes 35, 35. By fitting and tightening, the longitudinal dimension of the mount 25 can be adjusted,
The air conditioner 14 of various sizes can be stably supported on the mounting surface portion 31.

Further, as shown in FIG. 1 and FIG. 7, one drive unit 41 controlled by one control system is housed inside each main body 21, 22.

Each drive device 41 is provided with one electric drive motor 42 having a brake mechanism. Further, the drive device 41 is provided with a winding unit 45 in which the same winding drums 44, 44 are connected near both ends of a drive shaft 43 provided over substantially the entire width dimension of each of the main body portions 21, 22. Has been. The drive shaft 43 of the winding unit 45 is rotatably supported by four bearing members 46 arranged on both sides of each winding drum 44 via bearings. The drive sprocket 42a fixed to the output shaft of the drive motor 42 and the winding unit
The first sprocket 43a fixed to the drive shaft 43 of 45,
The winding units 45 are connected through an annular chain 49, and the winding motors 45 are rotationally driven in the forward and reverse directions so that the respective winding units 45 are simultaneously rotationally driven in the forward and reverse directions.

Further, the base ends of the flat belts 28, 28 are connected to the winding drums 44, 44 on both sides of each winding unit 45, and by rotating the winding unit 45 in the forward and reverse directions, The flat belts 28, 28 on both sides are simultaneously wound in or unwound.

Each flat belt 28 is wound around a guide pulley 51 which is rotatably supported, and each main body 2
Each main body part 2 through the outlet 52 formed on the upper surface of 1, 22
Derived above 1,22.

Furthermore, these guide pulley 51 and outlet 52
A turbulent winding prevention device 54 for preventing the flat belt 28 from being loosened is provided between and.

The irregular winding prevention device 54 prevents the flat belt 28 from loosening especially when it is unrolled, and the one-way rollers 55 and 55 on both sides are rotatably supported only in the winding direction of each flat belt 28. And the pressing rollers 56, 56 on both sides for pressing the flat belts 28, 28 against the one-way rollers 55, 55, respectively.
The 5, 55 are designed to rotate integrally with each other without making sliding contact with the flat belt 28.

The one-way rollers 55, 55 on both sides are
The auxiliary shafts 58 are coaxially supported by each other, and the auxiliary shafts 58 are parallel to the drive shaft 43 and are rotatably supported by the bearing member 46.

Each one-way roller 55, 55 has a so-called one-way clutch and is rotatably supported only in the winding direction of the flat belt 28 by the auxiliary shaft 58. Therefore, the drive torque of the auxiliary shaft 58 only in the feeding direction of the flat belt 28 is transmitted to each one-way roller 55.

Further, an auxiliary sprocket 58a rotatably supported on the auxiliary shaft 58 and a second sprocket 43b fixed to the drive shaft 43 are connected via an annular chain 62. And the auxiliary sprocket 58a is the drive shaft.
If the auxiliary sprocket 58a and the auxiliary shaft 58 are fixed, the diameter of the second sprocket 43 is smaller than that of the second sprocket 43b, and the one-way speed is higher than the maximum value of the feeding speed of the flat belt 28 from the winding drum 44. The peripheral speed of the roller 55 is set to be slightly higher.

The auxiliary sprocket 58a is connected to the auxiliary shaft 58 via a friction clutch mechanism 63 as a friction gear. That is, the friction clutch mechanism 63 is
Located on both sides of the auxiliary sprocket 58a, it has metal bushes 64, 64 that rotate integrally with the auxiliary shaft 58. These metal bushes 64, 64 are provided by a spring body 66 whose biasing force is adjusted by an adjusting nut 65. , Auxiliary sprocket 58a
It is designed to be pushed to the side. Adjusting nut 65
Is fixed by a lock nut 65a.

Therefore, with the auxiliary sprocket 58a having a resistance force above a certain level, the auxiliary sprocket 58a is
The metal bushes 64, 64 are in sliding contact with each other, the drive torque transmitted from the drive shaft 43 to the auxiliary shaft 58 via the chain 62 is reduced as necessary, and the feeding speed of the flat belt 28 and the circumference of the one-way roller 55 are reduced. It is designed to equalize speed.

That is, in this embodiment, since the auxiliary sprocket 58a is rotationally driven so that the peripheral speed of the one-way roller 55 is slightly higher than the maximum value of the feeding speed of the flat belt 28 from the winding drum 44. Even in the initial stage of unwinding the flat belt 28 around the winding drum 44 almost completely, the auxiliary sprocket 58a and the metal bushes 64, 64 are in slight sliding contact with each other, and the flat belt 28 is slightly moved in the unwinding direction. It is designed to add a load. Then, as the flat belt 28 is gradually unwound from the take-up drum 44, the take-up radius of the flat belt 28 becomes smaller, and the unwinding speed of the flat belt 28 becomes slower, the auxiliary sprocket 58a and the metal bushes 64, 64 are separated from each other. The amount of slippage increases, and the flat belt
The delivery speed of 28 and the peripheral speed of the one-way roller 55 are kept equal.

Further, each pressing roller 56 is pivotally supported by the tip end of a swingable arm portion 68, and each arm portion 68 is pressed toward the one-way roller 55 side by a spring body 69.

On the other hand, on the drive shaft 43, as shown in FIG.
A limit switch mechanism 71 is provided. The limit switch mechanism 71 prevents damage due to excessive winding of the flat belt 28 and winding in the opposite direction (reverse winding) due to excessive feeding, and the screw groove portion provided on the drive shaft 43.
It has a ball screw 73 that is screwed into 43c. The ball screw 73 is guided by an auxiliary rod 74 parallel to the drive shaft 43 and is prevented from rotating.
It is designed to move back and forth along the axial direction of 43. Further, in the vicinity of both ends of the limit switch mechanism 71, a pair of microswitches 76 and 77 that constitute a sensor facing the ball screw 73 are arranged, and at the center of these microswitches 76 and 77. Then, the third micro switch 78 is arranged. Further, operators 76a, 77a, 78a are provided so as to project from the microswitches 76, 77, 78 toward the ball screw 73, respectively.

Then, for example, in a state where the drive shaft 43 is rotated in the forward direction and the flat belts 28, 28 on both sides are wound up almost completely, the tip of the ball screw 73 is one end of the micro switch 76.
Of the micro switch.
From 76, a signal for stopping the drive motor 42 is output to a control device (not shown). Also, with the drive shaft 43 rotated in the opposite direction and the flat belts 28, 28 on both sides being extended almost completely, the tip of the ball screw 73 abuts against the operator 77a of the micro switch 77 on the other end and pushes it. A signal for stopping the drive motor 42 is output from the micro switch 77 to a control device (not shown).

Further, every time each flat belt 28 is fed from the winding drum 44 or wound, the operator 78a of the third micro switch 78 is pushed, whereby the flat belts 28 are moved up and down. You can measure the number of times it operated. Then, for example, when the elevating operation is performed about 2000 times, a belt life counter (not shown) informs the timing of inspection and replacement of each flat belt 28.

Next, the bolt side fixing device 26 will be described.

As shown in FIGS. 2 to 4, 8 and 9, the pair of front and rear bolt side fixing devices 26, 26 fixed to the suspension bolt 12 have a length substantially equal to the width of the pedestal portion 25. It has a frame body 81 which is a sheet metal part having dimensions. Each frame body 81 has upper and lower end portions bent along the longitudinal direction to form upper and lower flange portions 81a and 81b, which are formed in a substantially U-shaped cross section, and both end portions in the longitudinal direction are formed. It is bent to form a pair of end plate portions 81c.

Further, paired bolt fixing portions 83, 83 are attached near both ends of the frame 81. Each bolt fixing part 83 is a frame body between the upper and lower flange parts 81a and 81b.
A main body 85 slidably fitted along the longitudinal direction of 81,
It has a door body 86 combined with the main body 85.

A semi-cylindrical bolt meshing portion 85a meshing with the thread groove of the suspension bolt 12 is formed in the main body 85 with the vertical direction as the axial direction.
A horizontal plate-shaped bearing piece 85b is provided on one side of 85a, and a screw hole 85c is formed on the other side of the bolt meshing portion 85a and has a horizontal axial direction. ing.

On the other hand, the door body 86 is formed with a semi-cylindrical bolt meshing portion 86a which meshes with the thread groove of the hanging bolt 12 with the vertical direction as the axial direction.
A cylindrical portion 86b having a cylindrical shape is formed on one side of 86a, and a circular hole portion 86c is formed on the other side of the bolt meshing portion 86a. Also, this circular hole 86
A clamp screw 88 is rotatably attached to c, and the clamp screw 88 is attached to the circular hole portion 86c at the C position.
The mold ring 88a prevents it from falling off.

The main body 85 and the door body 86 are swingably connected to each other by a link bolt 89 inserted through a through hole formed in the bearing piece portion 85b and an inner side of the tubular portion 86b. The door 86 with the main body 85, and the clamp screw 88
By screwing the screw into the screw hole 85c and tightening it.
The door body 86 and the door body 86 are fixed in close contact with each other. Further, in the state in which the main body 85 and the door body 86 are fixed in this manner, the bolt engagement portions 85a and 86a of each other are substantially cylindrical and form a nut portion which is engaged with and fixed to the hanging bolt 12. It is supposed to be done. The circular hole 86c of the door 86 is
So that the clamp screw 88 can be deeply screwed into the screw hole 85c.
It has a long hole shape.

Further, a small hole 85d is formed on the upper surface of the main body 85.
The spring body 90a is formed in this small hole 85d.
A so-called ball plunger 90 composed of a sphere 90b is provided so as to be retractable. Then, by selectively engaging the ball plunger 90 with the through holes 81d formed in the upper flange portion 81a of the frame body 81 at predetermined intervals, the bolt fixing portion 83 is positioned and the hanging bolt 12 is generally arranged. The space between the bolt engaging portions 85a and 86a of the bolt fixing portions 83 on both sides is easily adjusted so as to comply with the standard.

Each bolt fixing portion 83 is fixed to the frame body 81 by a bolt 91 screwed from the outer surface side of the frame body 81.

Further, hook receiving plates 92 each constituting a hanging string connecting portion are fixed to the end plate portions 81c at both ends of the frame 81 by a plurality of bolts 94. And this hook receiving plate 92
Which is located on the lower side and has the vertical direction as the longitudinal direction.
a is formed, and a hook 28a provided at the tip of each flat belt 28 is locked in this hooking hole 92a. In addition, each hook 28a has a retaining pawl 28 that is elastically pivoted to prevent it from coming off.
b is provided.

Next, the control system of the lifting device 20 will be described.

In the first main body portion 21 which constitutes the pedestal portion 25,
A control device (not shown) is provided. This control device is composed of, for example, a CPU, and includes a first main body portion 21.
Is connected to a first control system including a drive motor 42 that constitutes the drive device 41 of FIG. 1 and each of the microswitches 76 and 77, and as shown in FIG. A first control system including a drive motor 42, which constitutes a drive device 41 of the second main body 22, and micro switches 76 and 77, etc., via a connecting cord 101 mounted between the main body 22 and the main body 22. It is connected to the. Further, this control device is connected to a commercial AC power supply via a power supply line (not shown) and is also connected to a remote control device 27 via a remote control cord 102.

The remote control device 27 has a first control system for controlling the drive device 41 of the first main body portion 21 and a second control system for controlling the drive device 41 of the second main body portion 21 via the control device. Is connected to the control system. And this remote control device 27
Is a raising switch sw that winds the four flat belts 28 together by operating the first control system and the second control system as a unit.
A lowering switch sw2 is provided for feeding the 1 and 4 flat belts 28 together. Further, the remote control device 27 includes
As an operating unit, a raising switch sw3 that simultaneously winds only the two flat belts 28 drawn out from the first main body portion 21 and a downward movement that simultaneously feeds out only the two flat belts 28 drawn out from the first main body portion 21. A switch sw4 is provided, and further two flat belts 28 derived from the second main body 22 are provided.
An ascending switch sw5 for simultaneously winding only the same and a descending switch sw6 for simultaneously unwinding only the two flat belts 28 derived from the second main body 22 are provided. A power switch 105 for turning on / off the power supply of each control system is provided below the remote controller 27.

The first body 21 and the switches sw3 and sw4 for operating only the two flat belts 28 derived from the first body 21 are colored in the same color such as green. Together with the second body 22 and the second body 22
The switches sw5 and sw6 for operating only the two flat belts 28 derived from 22 are colored in the same color such as red.

Next, the work process of installing the air conditioner 14 in the ceiling using the lifting device of this embodiment will be described.

First, as a preparation for the ceiling side, the frame body of the bolt side fixing device 26 is adjusted in accordance with the intervals of the four suspension bolts 12 which are previously planted according to the size of the air conditioner 14.
Bolt fixing portions 83, 83 are fixed near both ends of 81, and upper nuts (not shown) are screwed onto the respective hanging bolts 12. Then, the suspension bolt 12 is held between the main body 85 of each bolt fixing portion 83 and the door body 86 so that they are meshed with each other, and the clamp screw 88 is screwed into the screw hole 85c to be tightened, so that the two bolt sides The fixing devices 26, 26 are attached to the upper part of the suspension bolt 12 in parallel with each other.

Further, as preparation for the ground side, the first and second main body portions 21 and 22 conveyed in the disassembled state are arranged to face each other, and the first and second main body portions 21 and 22 are arranged. Are connected by a pair of connecting bodies 24, 24 at a predetermined interval to form a pedestal portion 25 adapted to the size of the air conditioner 14. At this time, the positions of the lead-out holes 52 of the flat belts 28 of the gantry unit 25 and the hook receiving plates 92 of the bolt side fixing device 26 are aligned vertically.

Then, the lowering switch sw of the remote control device 27
2 is pushed to rotate the drive motors 42 of the main bodies 21 and 22 in the reverse direction, the flat belts 28 wound around the winding drums 44 are fed out from the lead-out holes 52, and the hooks at the end portions of these flat belts 28 are hooked. 28a to the hook holes 92a of the bolt side fixing device 26, respectively.
Hang on.

At this time, since the flat belts 28 are pushed out in the unloaded state, there is a risk that slack will occur inside the main body portions 21 and 22. However, the auxiliary shaft 58 of the random winding prevention device 54 is
The one-way roller 55 is rotatably driven so that the peripheral speed of the one-way roller 55 is slightly higher than the maximum value of the feeding speed of the flat belt 28 from the winding drum 44, and the winding radius of the flat belt 28 on the winding drum 44 changes. Regardless of the above, the one-way roller 55 is in close contact with the flat belt 28 while being loaded in the direction in which the flat belt 28 is unwound, and is rotationally driven at the same unwinding speed as the unwinding speed of the winding drum 44. 2
The slack of the flat belt 28 is prevented from being generated inside the belts 1, 22.

As each flat belt 28 is fed out,
The take-up radius of the flat belt 28 on the take-up drum 44 gradually decreases, and the payout speed of each flat belt 28 gradually decreases with respect to the rotation speed of the auxiliary shaft 58. At this time, by the friction clutch mechanism 63, the auxiliary sprocket 58a
The slippage between the metal bushes 64 and 64 and the one-way roller 55 is suppressed and the take-up drum 44
The feeding speed of the one-way roller 55 is kept equal to the feeding speed of the one-way roller 55. Therefore, the flat belts 28 and the one-way rollers 55 are prevented from slidingly contacting each other to prevent the flat belts 28 from being worn, and the life of each flat belt 28 is prevented from being shortened.

When the amount of feeding of each flat belt 28 becomes too large due to an erroneous operation or the like, the take-up drum 44
Before the reverse winding state is reached, the limit switch mechanism 71 operates to automatically stop the drive motors 42.

Then, with the air conditioner 14 placed on the pedestal portion 25 and fixed with a belt or the like, if necessary,
Push the raising switch sw1 on the remote control device 27 to
The drive motors 42 of 21 and 22 are normally rotated to wind the flat belt 28 around each winding drum 44. Then, the air conditioner 14 is lifted up together with the pedestal part 25, and the groove 15 of each mounting bracket 16 of the air conditioner 14 is lifted.
With each hanging bolt 12 inserted in the
Release your hand from 1 and stop the gantry 25. In this state,
An air conditioner 14 is fixed to each suspension bolt 12 by screwing a nut (not shown) from below onto each suspension bolt 12.

After the air conditioner 14 is fixed in this way, the lowering switch sw2 of the remote control device 27 is pushed to reverse the drive motors 42 of the main bodies 21 and 22 to cause the winding drums 44 to move. The flat belt 28 wound and stored is unwound from the lead-out hole 52, and the gantry 25 is lowered. Then, with the pedestal portion 25 landing on the floor surface, attach the hook 28a to each bolt side fixing device.
The installation work is completed by removing the bolt side fixing device 26 from each of the hanging bolts 12 as well as removing it from the hanging bolts 12.

In the process of hoisting the gantry unit 25, when the gantry unit 25 is tilted, the switches sw3 to sw6 connected to the first and second control systems are pushed to operate. , First and second body portions 21, 22
The drive motor 42 can be separately rotated to adjust the pedestal portion 25 to be horizontal.

In the process of hoisting the mount 25, each one-way roller 55 idles. In this state, since each flat belt 28 is pressed by the pressing roller 56 and the one-way roller 55, a slight load is applied to each flat belt 28, and the irregular winding of each flat belt 28 is prevented. It is like this.

When the take-up amount of each flat belt 28 becomes too large due to an erroneous operation or the like, the limit switch mechanism 71 operates to automatically stop each drive motor 42, and the air conditioner 14 or the lifting device. It is designed to prevent 20 damage.

As described above, according to the hoisting device 20 of the present embodiment, even when the flat belt 28 is unloaded, the one-way roller 55 that rotates together with the flat belt 28 has the auxiliary shaft 58.
The one-way roller 55 pulls out the flat belt 28 and pulls it out from the outlet 52, so that the flat belt 28 can be prevented from loosening in the vicinity of the winding drum 44.

The speed difference (peripheral speed difference) between the feeding speed of the flat belt 28 from the winding drum 44 and the peripheral speed of the one-way roller 55 is determined by the auxiliary sprocket of the friction clutch mechanism 63.
It can be absorbed by sliding contact between 58a and metal bushes 64, 64. Therefore, the flat belt 28 is sequentially paid out from the winding drum 44, and the winding radius of the flat belt 28 is reduced,
Even when the feeding speed from the winding drum 44 becomes slow,
The one-way roller 55 and the flat belt 28 can be integrally rotated without sliding contact with each other, and the slack can be prevented without wearing the flat belt 28.

Further, when the flat belt 28 is wound, the one-way roller 55 that rotates together with the flat belt 28 idles, so that the resistance during winding can be prevented from becoming unnecessarily large.

Further, it is not necessary to provide a device for detecting the feeding speed of the flat belt 28, and the structure of the irregular winding prevention device 54 can be simplified.

Since one driving device 41 is provided for each of the first and second main body portions 21 and 22 which form the pedestal portion 25, a total of two driving motors 42 are operated to rotate 4
The length of the flat belt 28 of the book can be easily adjusted.
Therefore, compared to when controlling four drive motors,
The lifting device 20 can be easily operated, work efficiency can be improved, and the air conditioner 14 can be stably lifted to a high place. Also, even if you are unfamiliar with the installation work,
The work can be done easily and the installation time can be shortened.

Further, the first and second body portions 21 and 22 are
Since it is detachably connected by a pair of connecting bodies 24, 24 on both sides, by removing these connecting bodies 24, 24,
The gantry unit 25 can be divided to facilitate transportation, storage and the like.

Since each of the main body portions 21 and 22 is provided with three casters 32, each of the main body portions 21 and 22 can be individually placed on the floor surface in a stable state even when divided. Therefore, transportation and storage are facilitated, and the work of assembling the pedestal portion 25 by connecting the main body portions 21 and 22 to each other can be easily performed.

Further, the main bodies 21 and 22 are connected to each other by connecting bodies 24 and 24.
Since they can be fixed in a state of being separated from each other by any size via the, the air conditioners 14 of various sizes can be stably supported.

Further, each bolt side fixing device 26 is fixed and supported by the pair of suspension bolts 12 near both ends thereof, and has a pair of flat belts at both ends thereof.
28 is hooked and held. Therefore, even when lifting the heavy air conditioner 14, the frame body of each bolt side fixing device 26
Via 81, the bending force applied to the two suspension bolts 12 can be offset and deformation of each suspension bolt 12 can be prevented.

Further, the drive device 41 provided in the first main body 21
And a second control system for controlling the drive device 41 provided in the second main body 22,
Switches sw3 to sw that can operate these control systems independently
Since 6 is provided on the remote control device 27, these switches sw
By operating each of 3 ~ sw6, each drive device 41
Can be easily controlled, and the pedestal part 25 can be easily held horizontally.

Then, these switches sw3 to sw6 are
Since they are painted in the same colors as the colors of the main bodies 21 and 22, respectively, the switches sw3 to sw6 to be operated can be easily and intuitively recognized. Therefore, the operability of the hoisting device 20 can be improved, erroneous operation can be prevented, and safety can be improved.

Further, by such color coding, the assembling work can be facilitated. And each drive device
Since the limit switch mechanism 71 is installed on the 41, the flat belt
It is possible to prevent damage to the air conditioner 14 or the hook 28a due to excessive winding of 28, and reverse winding due to excessive feeding of the flat belt 28.

Further, the number of up-and-down operations is measured by the third micro switch 78 of the limit switch mechanism 71,
By providing a belt life counter for notifying the inspection and replacement of the flat belt 28 when the elevating operation has reached a predetermined number of times, deterioration of the flat belt 28 can be predicted and safety can be further improved.

It should be noted that, as shown in FIG. 10, by providing the leveling body 111 on the connecting body 110 constituting the pedestal part 25,
It is possible to easily check whether or not the pedestal part 25 is parallel, and it is possible to enhance the safety during the lifting operation and
The assembling work of itself can be facilitated. In addition,
In the embodiment shown in FIG. 10, a connector 110 having a U-shaped cross section is fitted to the outside of a connector holding metal fitting 112 provided on each of the main bodies 21 and 22. Furthermore, in this connection body 110,
Long holes 110a are formed on both sides of the spirit level 111, and screw holes 112a are formed in the connector holding metal fittings 112, respectively.
Are formed, and bolts are respectively inserted through the long holes 110a.
By screwing 115 into the screw hole 112a, each main body 21,
22 and the connecting body 110 are fixed.

Further, as shown in FIG. 11, two kinds of bolt engaging portions 121 and 122 are simultaneously formed on the main body 85 and the door 86, which constitute the bolt fixing portion 83 of the bolt side fixing device 26, respectively. You can also do it. That is, for example, by forming a bolt meshing portion 121 that meshes with the metric coarse screw and a bolt meshing portion 122 that meshes with the inch coarse screw, the pitch of the thread groove of the hanging bolt 12 is Whether it is formed by the metric standard or the inch standard, it is possible to cope with it by one kind of bolt side fixing device 26.

The bolt side fixing device shown in FIG.
When using 26, a method of mounting a pair of bolt fixing portions 83 formed symmetrically to each other near both ends of the frame 81, and a bolt fixing portion 83 having the same shape near both ends of the frame 81.
It is possible to select the method of mounting the. Then, by using a pair of bolt fixing portions 83 which are formed symmetrically with each other, each bolt engaging portion with respect to the longitudinal direction of the frame body 81.
121 and 122 can be arranged symmetrically, and the bolt side fixing device
It is possible to improve the balance of the load that the 26 receives.
Further, by using the bolt fixing portion 83 having the same shape,
The manufacturing cost of the bolt side fixing device 26 can be reduced.

Further, in the bolt side fixing device 26 shown in FIG. 8 and FIG. 11, the hook receiving plates 92 constituting the hanging string connecting portion are fixed to the both ends of the frame 81 by the plurality of bolts 94. This hook receiving plate 92 or flat belt 28 hook
By rotatably providing the 28a, it is possible to prevent the flat belt 28 from twisting. Therefore, when the hook 28a of the flat belt 28 is hooked in the hooking hole 92a of the hook receiving plate 92, the work of checking the twist of the flat belt 28 can be eliminated.

In addition, in these bolt side fixing devices 26, the bolt side fixing devices 26 may be arranged so as to intersect each other by connecting the bolt side fixing devices 26 between the hanging bolts 12 located diagonally to each other. it can.

Further, as shown in FIGS. 12 to 14, it is also possible to use bolt side fixing devices 125, 126 and 127 which are attached to the suspension bolts 12 one by one.

Then, the bolt side fixing device 12 shown in FIG.
5 is a connecting body 130 and bolts 131, 13 on the connecting body 130.
It has a pair of clamp bodies 132, 132 which are connected to each other via 1 so as to be rotatable in the vertical direction. In addition, each clamp body 132 has a bolt meshing portion 132a that meshes with the hanging bolt 12 on the inner end surfaces that face each other, and is located outside each bolt 131 and that is a hook fixing body. 133 is screwed and fixed. Then, in a state where the suspension bolt 12 is held between the bolt engaging portions 132a, 132a of the clamp bodies 132, 132 on both sides and engaged with each other, the hook fixing bodies 133, 133 on both sides are attached to the tip portions of the flat belts 28, respectively. By hooking the provided hook metal fitting 28c, the hook fixing body 13
Using the load applied to 3, 133, the clamp bodies 132, 13
2 tightens the suspension bolt 12, and the bolt side fixing device 125 is firmly fixed to the suspension bolt 12.

Further, the bolt side fixing device 126 shown in FIG.
Are connected to each other by two bolts 134 and 135 2
It is composed of a number of fixing plates 136, 136, and the engaging surfaces of each fixing plate 136 have bolt engaging portions 137, 13 for engaging the hanging bolts 12.
7 is formed with the vertical direction as the axial direction,
In the vicinity of both ends of each fixing plate 136, hooking holes 138, 13 for hooking hooking metal fittings 28c provided at the tip of the flat belt 28 are provided.
8 are formed. And this bolt side fixing device 12
6 is a state in which the suspension bolt 12 is sandwiched between the bolt engaging portions 137, 137, and the two fixing plates 136, 136 are fastened and tightly attached with the bolts 134, 135 so that the suspension bolt 12 is fixed to the suspension bolt 12. There is.

Further, the bolt side fixing device 12 shown in FIG.
Reference numeral 7 denotes a single fixing plate 140, and a bolt engaging portion 141 that is screwed into the hanging bolt 12 is formed in the central portion in the longitudinal direction so as to penetrate in the vertical direction and both end portions in the longitudinal direction. In the vicinity, hooking holes 142, 142 for hooking hooking metal fittings 28c provided at the tip of the flat belt 28 are formed. In addition, this bolt side fixing device 127 is
The entire structure is rotated and screwed into the suspension bolt 12, and the mounting bracket 16 of the air conditioner 14 is left on the suspension bolt 12 as it is while being fixed to the suspension bolt 12.

Further, for example, as shown in FIG. 15 and FIG. 16, by fitting the guides 151 and 152 to the respective mounting brackets 16 of the air conditioner 14, the air conditioner 14 is lifted when the air conditioner 14 is lifted. Groove 15 of each mounting bracket 16 of device 14
The hanging bolt 12 can be easily inserted into the.

The guide guide 151 shown in FIG.
The fitting portion 151a, which is made of synthetic resin or the like, into which the mounting brackets 16 are fitted, communicates with the groove portions 15 of the mounting brackets 16, and the width dimension is gradually reduced toward the groove portions 15 so that A guide surface portion 151b inclined like a funnel is formed,
It is adapted to be fixed to each mounting member 16 with a screw 151c.

The guide guide 152 shown in FIG. 16 is formed by bending a thin plate such as an iron plate.
2a and the side plate portion 15 bent from both sides of the end plate portion 152a.
2b and 152b, and upper plate portions 152c that are formed by bending inwardly downward from the upper ends of the side plate portions 152b and 152b,
152c, and lower plate portions 152d, 152d that are formed by bending slightly downward inward from the lower end portions of the side plate portions 152b, 152b. Then, the upper plate portions 152c and 152c and the lower plate portion 152
The fitting 16 of the air conditioner 14 is fitted between d and 152d, and the upper surface of each upper plate portion 152c constitutes a guide surface portion 152e that faces the groove 15 of the fitting 16.

By using these guide guides 151 and 152, when the air conditioner 14 is hoisted, the hanging bolts 12 abutting on the respective guide surface portions 151b and 152e are attached to the respective mounting brackets.
It can be guided to the groove portions 15 of 16 and inserted. In this way, the hanging bolts 12 can be easily and smoothly inserted into the groove portions 15 of the respective mounting brackets 16 of the air conditioner 14, so that it is not necessary to correct the position of the air conditioner 14 which is heavy in the air, and the installation work is required. The time and labor can be reduced, and the safety of installation work can be improved.

The guide guides 151 and 152 are
Since the hanging bolt 12 can be easily removed with the hanging bolt 12 inserted in the groove 15 of each mounting member 16, it can be used a plurality of times.

Further, at least one of the first and second main body portions 21 and 22 is provided with a storage portion for storing the fixing device 26, the coupling body 24, a dedicated tool or the like, so that the hoisting device 20 can be transported and stored. Etc. can be facilitated.

Further, by providing a scale along at least one of the two flat belts 28 provided on each of the main bodies 21 and 22 along the longitudinal direction of the belt, the payout length of the flat belt 28 can be visually confirmed. Can be easily confirmed, and each flat belt 28 can be wound or unwound just by an appropriate length dimension.

Then, a lamp is provided on each of the main bodies 21, 22 or the remote control device 27, and the lamp is blinked during the raising / lowering operation of the gantry unit 25 to notify that the gantry unit 25 is in the raising / lowering operation. And can increase safety.

Although the above embodiments have been described with respect to the case where the air conditioner 14 is installed, they can also be used for a ceiling-mounted lighting fixture, show window decoration, or installation of an air conditioning duct. .

In each of the above embodiments, the flat belt 28 is used as the cord body, but it can be applied to the case where the rope or the wire is wound around the multi-winding drum.

Further, in each of the above embodiments, the air conditioner 14
Although the groove 15 through which the hanging bolt 12 is inserted is formed in each of the mounting brackets 16, the mounting bolt 16 can be inserted through forming a circular hole (not shown) in each mounting bracket 16.

Further, in each of the above embodiments, each main body portion 21,
Although three casters 32 are provided on each of the 22 to support three points, the casters 32 may not be provided, and one caster 32 may be provided and two support rods (not shown) may be provided to project three points. It is also possible to support, or to provide two casters 32 and to project one support rod (not shown) to support at three points, or to provide four or more casters 32.

[0091]

According to the irregular winding prevention device of the present invention, the one-way roller, which rotates together with the cord when the cord is unwound, is driven to rotate by the auxiliary shaft, and the one-way roller pulls out the cord to take up the winding drum. It is possible to prevent loosening of the cord body in the vicinity. The speed difference between the feeding speed from the winding drum and the peripheral speed of the one-way roller can be absorbed by the sliding of the friction gear, so that the one-way roller and the cord do not make sliding contact. Therefore, since the abrasion of the cord body is suppressed, the life of the cord body can be extended. Then, even when the cords are sequentially unwound from the winding drum, the winding radius of the strings changes, and the unwinding speed from the winding drum changes, sliding contact between the one-way roller and the string can be prevented. At the same time, no more tensile force than necessary is applied to the cord body. Since the one-way roller that rotates together with the cord rotates idly when the cord is wound, the winding resistance does not increase more than necessary.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an irregular winding prevention device of the present invention.

FIG. 2 is a perspective view showing a lifting device using the same irregular winding prevention device.

FIG. 3 is an end view of the same lifting device.

FIG. 4 is a front view of the same lifting device.

FIG. 5 is a front view of the same pedestal part.

FIG. 6 is an end view of a part of the same pedestal part.

FIG. 7 is a sectional view of the same main body section.

FIG. 8 is a perspective view of a part of the same bolt side fixing device.

FIG. 9 is a plan view of a part of the above bolt side fixing device.

FIG. 10 is a perspective view of a disassembled state of a part of a pedestal part showing another embodiment of the present invention.

FIG. 11 is a perspective view of a part of a bolt side fixing device showing another embodiment of the present invention.

FIG. 12 is an explanatory view of a bolt side fixing device showing still another embodiment of the present invention. (A) is a plan view (b) is a front view

FIG. 13 is an explanatory view of a bolt side fixing device showing still another embodiment of the present invention. (A) is a plan view (b) is a front view (c) is an end view

FIG. 14 is an explanatory view of a bolt side fixing device showing still another embodiment of the present invention. (A) is a plan view (b) is a front view (c) is an end view

FIG. 15 is a perspective view of a guide guide in an exploded state showing another embodiment of the present invention.

FIG. 16 is a perspective view of a guide guide in an exploded state showing still another embodiment of the present invention.

[Explanation of symbols]

 28 Flat belt as a cord 43 Drive shaft 44 Winding drum 54 Random winding prevention device 55 One-way roller 58 Auxiliary shaft 63 Friction clutch mechanism as a friction gear

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masanori Hosono, 180 Furuichi-machi, Maebashi, Gunma Prefecture, Toshiba Equipment Co., Ltd. (72) Tokio Shirai, 180, Furuichi-machi, Maebashi, Gunma, Toshiba Equipment Co., Ltd. (72) ) Inventor Taizo Ishikawa 180 Furuichi-cho, Maebashi City, Gunma Prefecture, Toshiba Equipment Co., Ltd. (72) Inventor Tadayoshi Ishigaki 1-5-13 Shinkawa, Chuo-ku, Tokyo Inside Custom Center, Isei Building Co., Ltd.

Claims (1)

[Claims] 1. A take-up drum, which is driven by a drive shaft to rotate forward and backward to wind and unwind a cord body, an auxiliary shaft connected to the drive shaft via a friction gear, and which rotates together with the cord body, and And a one-way roller rotatably supported on the auxiliary shaft only in the feeding direction of the cord body.