JPH0756301Y2 - Endless winch - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endless winch.

[0002]

2. Description of the Related Art An ordinary winch has a structure in which one end of a wire is fixed and wound around a drum, and is generally most often used for lifting and lowering heavy objects. It is also used when moving loads such as doors back and forth.

When the load is reciprocated in this way, as shown in FIG. 8, two winches 2 and 3 are provided, one at each end of the load 1 such as a dolly in the moving direction of the load, and rails are provided. Four
Drum 5 of each winch 2 and 3 to load 1 traveling on
Fix the ends of the wires 6 and 7 that are unwound from the drum, and wind the drum 5 in the traveling direction, and at the same time, drum 5 on the opposite side.
The load 1 is run by unwinding.

When the reciprocating movement of the load 1 is performed using the ordinary winch as described above, two winches 2 and 3 are required, and the wires 6 and 7 are wound and unwound at the same time. In order to prevent the loosening of 6 and 7, it is necessary to synchronize the operation of the drive device (not shown) such as the drive motor of the two winches 2 and 3. Further, the normal winch has a drawback that the traveling speed of the load 1 changes due to an increase in the peripheral speed as the drum 5 winds the wires 6 and 7 and winds the wires.

On the other hand, in recent years, what is called an endless winch has been developed as a means for solving the drawbacks of such a normal winch.

9 and 10 show an example of the endless winch 15, in which two drums 9 and 10 are provided in the casing 8 in parallel to the left and right, and provided on one side in the axial direction of the drums 9 and 10. The drive motor 11 causes the power transmission portion 11a (gear mechanism) provided on the other side to drive the drums 9, 1
0 is configured to rotate simultaneously in the same direction.
A structure in which the wire 12 is wound around the drums 9 and 10 by one layer a plurality of times to lead out the wire 12 from the wire port 13 of the casing 8, and the winding and unwinding of the wire 12 are simultaneously performed by the rotation of the drums 9 and 10. have. Wire grooves (not shown) are formed on the outer peripheral surfaces of the drums 9 and 10 so that the winding position of the wire 12 does not change.

In the case of the endless winch 15 shown in the drawing, both ends of the wire 12 are drawn out to the upper side. However, as shown in FIG. 11, the wire 12 is drawn out to the left and right sides, or both ends of the wire are drawn from one side. Is adopted, and further, it is drawn out in various directions according to the purpose of use, such as leading out to the upper side and one side to the left and right.

In the endless winch 15, as described above, the wire 12 is wound between the two drums 9 and 10 to increase the frictional force, and the rotation of the drums 9 and 10 causes the wire 12 to be wound and unwound at the same time. Because
As shown in FIG. 11, the wire 12 is disposed endlessly along the running direction of the load 1 via the sheave 14, and the load 1 is fixed in the middle of the wire 12,
The movement of the load 1 can be driven by one endless winch 15. Therefore, it is not necessary to provide the two winches 2 and 3 and synchronize their drive units unlike the normal winch shown in FIG. Furthermore, the endless winch 15 connects the wire 12 between the drums 9 and 10 a plurality of times.
Since only the layers are wound, there is an advantage that the moving speed of the load 1 does not change due to the thickening of the wire.

The casing 8 is usually formed by casting, and the wire winding openings 16, 1 are formed on the casing walls at both ends in the direction in which the drums 9, 10 are arranged in parallel.
7 and a closing plate 18 for closing the wire winding openings 16 and 17.

In the endless winch 15 as described above, when the wire 12 wound between the two drums 9 and 10 is slightly loosened, a slip occurs between the wire 12 and the drums 9 and 10. However, there arises a problem that the work of moving the load, hoisting and lowering the work becomes unstable, or the work becomes completely impossible.

Therefore, as shown in FIG. 11, a pulley 12a and a pulling tool 12b such as a weight or a spring are provided so that slips due to loosening or the like do not occur between the drums 9 and 10 and the wire due to the extension of the wire. It is considered that a winding force holding device 12c is arranged so that the wire 12 always holds a required tension by a combination of the above.

[0012]

However, in the method of installing the winding force holding device 12c as described above, there is a problem that the structure becomes large and the cost increases, and in order to prevent the slip, In order to keep a large tensile force applied to the wire 12,
In addition, the sheaves 14 and the like are severely worn and maintenance becomes difficult.

The present invention has been made in order to solve the problems in the above-mentioned conventional method. With a simple and compact structure, the wire wound around the drum is prevented from being loosened and a reliable winch work can be performed. The purpose is to provide an endless winch.

[0014]

SUMMARY OF THE INVENTION According to the present invention, two drums are supported by a casing in parallel to each other in the left-right direction, and a plurality of wire grooves are formed on the outer periphery of the drum. A rotating drive motor, and winding the intermediate portion of the wire between the drums a plurality of times ,
An endless winch designed to prevent the winding portion from loosening, and an arm that can be moved toward and away from each drum by pivoting to the outer side in the left-right direction in which the drums are juxtaposed and a shaft of the drum. A swing frame attached to the arm so as to be rotatable in a direction perpendicular to the axis of the drum at both ends in the direction, and a wire attached to the swing frame at intervals with respect to the swing direction of the swing frame. A winding force holding device including a pair of pressing rollers each having a pressing groove to be fitted on the outer circumference and a spring for pressing the arm so as to rotate the arm toward the drum side, is provided. And an endless winch characterized in that the wire groove formed on the outer circumference of the drum has a substantially V shape.

[0015]

According to the first aspect of the invention, the wire wound between the juxtaposed drums is pressed by a pair of pressing rollers provided at both axial ends of each drum by the elastic force of the spring. Since the wire is pressed into the groove, the wire wound between the drums is pressed at four places, so the wire will not loosen at the part wound on the drum, and therefore the drum will always rotate. The wire can be reliably transmitted to the drum, and the wire can be reliably wound and unwound.

According to the second aspect of the present invention, since the wire groove formed on the outer periphery of the drum is substantially V-shaped, the wire wound around the drum acts so as to bite into the wire groove, and thus the drum. It is possible to more reliably prevent the occurrence of slip between the wire and the wire.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

4 to 7 show an example of an endless winch to which the present invention is applied. A power transmission section 21 is provided in a casing 20 fixed on a fixed base 19 and the front side of the casing 20 (FIG. 5). Two drums 23, 24 whose drum shaft 22 is connected to the power transmission unit 21 are provided in parallel at the left and right positions (on the lower side). Two drums 23, 24
Each have a plurality of wire grooves 25 on the outer circumference.

Rear side of the casing 20 (upper side in FIG. 5)
A drive motor 26 connected to the power transmission unit 21 is attached to the drive power transmission unit 21, and the two drums 23 and 24 are simultaneously rotated in the same direction by the drive motor 26 via the power transmission unit 21. At this time, the power transmission unit 21 is
As shown in FIG. 5, a large gear 28 meshing with a drive pinion 27 rotated by a drive motor 26, a small gear 29 coaxially provided with the large gear 28, and the drums 23, 24 so as to mesh with the small gear 29. Drum gear 30, which is integrated with the
And the drum gears 30 and 31 as shown by the arrows in the figure by the rotation of the drive pinion 27.
Are designed to rotate in the same direction at the same time.

An opening / closing frame 32 is provided on the front side of the drums 23, 24 to open and close the front sides of the drums 23, 24. That is, the shaft support portion 33 is provided on the fixed base 19 at the front end positions of the drums 23 and 24, and the open / close frame 32 having the shaft 34 fitted to the shaft support portion 33 at the lower end is rotatably arranged. 6, the front side of the drums 23, 24 is opened by tilting the open / close frame 32 as shown by the phantom line in FIG.
Further, as shown by a solid line, the opening / closing frame 32 is erected and its upper end is fixed to the casing 20 by a fixing member 37 including a tie rod 35 and a fixing nut 36 so that the front sides of the drums 23 and 24 can be closed. There is.

Further, in order to prevent the distance between the front ends of the drum shafts 22 from approaching each other due to the tightening force of the wire 38, the bearings 39 of the drum shafts 22 are arranged at predetermined intervals between the front ends of the drum shafts 22. Bearing support plate 40 held by
And the outside (front side) on the outer peripheral surface of the bearing support plate 40.
A taper surface 41 in the direction of contracting toward the side, and a taper surface that matches the taper surface 41 is formed on the inner surface of the opening / closing frame 32, and the opening / closing frame 32 is fixed to the casing 20 by a fixture 37. At this time, the bearing surface 40 can be firmly supported by the tapered surface 41.

In the above structure, winding force holding devices 42 and 43 as shown in FIGS. 1 and 2 are provided further outside in the left-right direction of the drums 23 and 24 arranged side by side.

The winding force holding devices 42 and 43 are provided with a mounting plate 45 which is movable left and right through a slit 44 formed in the fixed base 19 and which is vertically restrained by a stopper plate 45a. The mounting plate 45 can be fixed to the fixing table 19 by a bolt 46, and the lower end of the mounting plate 45 is mounted by a support pin 47 so that the mounting plate 45 can be moved toward and away from the drums 23 and 24. It has an arm 48 which is rotatable in the direction.

At the upper end of the arm 48, the drum 23,
Swing frames 49, 50, which are rotatable on both axial sides of 24, in the up-down direction perpendicular to the axes of the drums 23, 24 about a shaft 48a parallel to the drums 23, 24.
Attached to each of the swing frames 49, 50,
A pair of pressing rollers 52 each having a pressing groove 51 on the outer circumference, which is mounted at intervals in the rotational direction of the swing frames 49 and 50 and fits into the wire 38 wound around the drums 23 and 24. , 53, 54, 55 are attached.

Further, a spring 57 is interposed between the bracket 56 formed on the mounting plate 45 and the arm 48 so as to press the upper end side of the arm 48 so as to rotate to the drum 23, 24 side. ing. Reference numeral 58 represents an adjusting screw for adjusting the pressing force of the spring 57.

The winding force holding device 4 shown in FIGS. 1 and 2.
When the endless winch is equipped with the wires 2, 43, the wire 38 wound around the drums 23, 24 arranged in the left-right direction is provided.
Is to be pressed by the elastic force of the spring 57 at four places by a pair of pressing rollers 52, 53, 54, 55 provided on both ends of each drum 23, 24 in the axial direction. If the wire 38 is loosened in other parts, the drum 23,
There is no looseness in the portion wound between the 24, and therefore the frictional force between the wire 38 and the drums 23, 24 is always kept high, and the rotation of the drums 23, 24 is reliably transmitted to the wire 38. The wire 38 can be reliably wound and unwound.

Further, the drum 2 is held by the small winding force holding devices 42 and 43 provided integrally with the endless winch.
Wire 3 in the winding part of wire 38 between 3 and 24
Since it is possible to reliably prevent the occurrence of loosening of No. 8, there is a problem that a large-scale configuration is required as in the conventional method of applying tension to the entire wire and the wear of the wire and the wire supporting device is accelerated. Can be prevented.

In the endless winch, when the wire 38 is wound around the two drums 23 and 24, the fixing nut 36 of the tie rod 35 is loosened to open and close the frame 32.
To the outside as shown by the phantom line in FIG.
Open the front side of 24.

Then, the two drums 23 and 24, whose ends are supported by the bearing support plate 40, are in an exposed state in which the two drums 23 and 24 are exposed. Therefore, the wire 38 is inserted between the drums 23 and 24 from the opened front side. Perform the winding work.
At this time, since the front sides of the drums 23 and 24 are open, the drums 23 and 24 can be set at arbitrary positions along the wire 38.
Can be easily wrapped around.

At this time, the winding force holding device 42,
43, the mounting plate 45 can be moved to the outside through the slit 44 when the bolt 46 is loosened, and the swing frames 49 and 5 can be moved to the position where the mounting plate 45 is moved to the outside.
Since 0 can be reversed outward about the shaft 48a, the winding force holding devices 42 and 43 can be retracted to a position that does not interfere with the winding operation of the wire 38.

Therefore, in comparison with the conventional method in which the wire is wound between the drums by repeating the work of inserting the wire from the wire winding opening, folding the wire 180 degrees on the other side, and inserting it again into the wire winding opening. Thus, the wire winding work can be completed easily and in a short time with a simple operation.

FIG. 3 shows an embodiment of the invention of claim 2 in which the wire grooves 25 formed on the outer circumferences of the drums 23, 24 are substantially V-shaped. At this time, the V-shaped wire groove 2
In No. 5, the outer peripheral side is smaller than the diameter of the wire 38 and the inner peripheral side is smaller than the diameter of the wire 38, and the angle α is about 38 to 40 degrees. The pressing rollers 52, 53, 54,
The pressing groove 51 formed in 55 has a radius of curvature r ₂ slightly larger than the radius r ₁ of the cross section of the wire 38.

According to the second aspect of the invention, since the wire grooves 25 formed on the outer circumferences of the drums 23 and 24 are substantially V-shaped, the pressing rollers 52, which are wound around the drums 23 and 24, are used.
The wire 38 pressed by 53, 54, 55 acts so as to bite into the wire groove 25, thereby further reliably preventing slippage between the drum 23, 24 and the wire 38. You can At this time, the pressing groove 51 of the pressing rollers 52, 53, 54, 55 is not connected to the wire 3
Since it has a radius of curvature r ₂ larger than the radius r _{1 of} 8,
The wire 38 can be reliably pressed without the wire 38 biting into the pressing groove 51.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0035]

According to the first aspect of the invention, the wires wound around the drums arranged in parallel in the left-right direction are moved by the pair of pressing rollers provided at both axial end portions of each drum. Since the pressure is applied at four places, the wire is prevented from loosening in the portion wound between the drums, and therefore the rotation of the drum is reliably transmitted to the wire with a small and simple structure, and the wire is wound. It is possible to reliably perform the feeding.

According to the second aspect of the present invention, the wire groove formed on the outer periphery of the drum is substantially V-shaped, so that the wire wound around the drum acts so as to bite into the wire groove. Thus, it is possible to more reliably prevent the occurrence of slip between the drum and the wire.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the invention of claim 1.

FIG. 2 is a view taken along the line II-II of FIG.

FIG. 3 is a detailed sectional view of a wire groove showing an embodiment of the invention of claim 2;

FIG. 4 is a front view of an endless winch to which the present invention is applied.

FIG. 5 is a plan view of FIG.

6 is a VI-VI arrow view of FIG. 4. FIG.

FIG. 7 is a front view showing an example of a power transmission unit.

FIG. 8 is a front view showing an example in which a normal winch is applied to reciprocal movement of a load.

FIG. 9 is a front view showing an example of a conventional endless winch.

10 is a view on arrow XX in FIG. 9. FIG.

FIG. 11 is a front view showing an example in which a load is reciprocally moved by a conventional endless winch.

[Explanation of symbols]

 20 Casing 21 Power Transmission Part 23 Drum 24 Drum 25 Wire Groove 26 Drive Motor 38 Wire 42 Winding Force Holding Device 43 Winding Force Holding Device 48 Arm 49 Swing Frame 50 Swing Frame 51 Pressing Groove 52 Roller 53 Roller 54 Roller 55 Roller 57 Roller 57 Spring

Claims (2)

[Scope of utility model registration request] 1. A drum having two casings supported in parallel in the left-right direction by a casing and having a plurality of wire grooves formed on the outer periphery thereof, and a drive motor for simultaneously rotating the both drums in the same direction via a power transmission unit, Wrap the middle part of the wire a plurality of times between the drums to prevent the wound part of the wire from loosening.
An endless winch configured such that the drums are arranged side by side in the left-right direction on the outer side in the left-right direction, and the arms can be moved toward and away from each drum by rotation, and the axial line of the drum at both axial ends of the drum. A swing frame mounted on the arm so as to be rotatable in a direction perpendicular to the swing frame, and a pressing groove fitted on the outer periphery of the swing frame at intervals with respect to each wire and fitted to a wire wound on the drum. An endless winch comprising a winding force holding device including a pair of pressing rollers each of which has and a spring for pressing the arm so as to rotate the arm toward the drum. 2. The endless winch according to claim 1, wherein the wire groove formed on the outer periphery of the drum has a substantially V shape.