JP2012116627A - Traverse gear for hoist - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost traverse gear for hoists excellent in traveling stability.SOLUTION: The traverse gear 10b for hoists which is prepared on the upper part of hoist body includes a first frame 21 in which two wheels 23 rolling along a guide rail are arranged and a second frame 22 in which two wheels 27 rolling along a guide rail are arranged, wherein both the frames 21 and 22 remain countered. The first frame 21 is fixed to the hoist body with two fixing pin members 33, while the second frame 22 is supported by the hoist body swingably with supporting pin member 34. The wheels 23 are driven rotatably by an electric motor 25 attached to the first frame 22 while the traverse gear 10b moves along the guide rail.

Description

  The present invention relates to a hoist traversing device in an electric hoist such as an electric hoist for lifting a heavy object.

  An electric hoist such as a hoist crane for moving a heavy load up and down has a hoist body provided with a hook for hanging the load. A drum around which a wire having a hook is wound is attached to the hoist body, and the hook is moved up and down by rotating the drum to lift and lower the suspended load. The hoist body incorporates an electric motor for rotationally driving the drum, and the drum is rotationally driven via a speed reducer.

  The hoist body is provided with a traversing device for driving the hoist body along a guide rail made of I-shaped or H-shaped steel. The traversing device has a driving-side frame and a driven-side frame each having two wheels. Both frames are attached to the hoist body so as to sandwich both sides of the guide rail, and an electric motor for driving the wheels is mounted on the drive side frame. As a traversing device, as described in Patent Document 1, there is a type in which each frame is mounted right above a hoist body. Furthermore, as a traversing device, as described in Patent Document 2, there is a type in which two frames are mounted along a guide rail.

  In the type in which one drive side and one follower frame are mounted directly above the hoist body, each frame is formed by a fixed frame consisting of a trapezoidal flat plate and an L-shaped flat plate, and a driven wheel is attached. A traversing device in which the movable frame is rotatably mounted on one fixed frame is described in Patent Document 3, and in this traversing device, both the fixed frames are connected by two connecting pins. I have to.

  On the other hand, Patent Document 4 describes a traversing device in which a hoist body is caused to travel along two guide rails arranged in parallel to each other. In this traversing device, each guide rail has four wheels traveling, the traversing device has eight wheels, and the wheel pair on one side of each guide rail in the traveling direction is driven by an electric motor. The drive wheel is driven.

JP 2001-89081 A JP 58-52198 A JP-A-2005-154122 Japanese Patent Laid-Open No. 2-8192

  As described in Patent Document 3, when the fixed frame on the driving side and the driven side are formed by a trapezoidal flat plate and an L-shaped flat plate, and each fixed frame is connected by two connecting pins, The structure becomes complicated. On the other hand, like the traversing device described in Patent Document 1, when the wheels are mounted on the driving side and the driven side fixed frames fixed to the hoist body with the guide rails sandwiched therebetween, the structure of each frame is simplified. However, depending on the planar accuracy of the guide rail and the mounting accuracy of the wheels, any one wheel may be lifted off the guide rail without all four wheels coming into contact with the guide rail.

  If even one wheel is lifted in this way, not only will the running stability be reduced, but the load on the other wheel will increase and wear of the wheel will be accelerated, and the replacement frequency of the wheel will increase. Further, in order to prevent the wheels from being lifted up, it is necessary to connect the respective fixed frames to each other and to increase the parallelism of the two connecting pins for fixing to the hoist body. For this reason, it is necessary to improve the attachment processing accuracy of the connecting pin, which is one factor that increases the manufacturing cost of the hoist traverse device.

  An object of the present invention is to provide a low-cost hoist traverse device having excellent running stability.

  The hoist traverse device of the present invention is provided on an upper portion of a hoist body provided with a rotating body for hoisting and lowering a suspended load, and in each hoist traverse device that travels along the guide rail, each of the guide rails is rotated. A first frame provided with two moving wheels; a second frame provided with two wheels each rolling on the guide rail; and a second frame disposed opposite to the first frame; and the hoist A first bracket that is attached to the main body and to which the first frame is fixed, and a support pin member that is attached to the hoist main body and passes between the two wheels provided in the second frame. A second bracket for swingably supporting the second frame; provided on one of the first frame and the second frame; And having an electric motor for transverse driving the wheels of a frame.

  The hoist traversing device of the present invention has a first frame fixed to the hoist body and a second frame that can swing on the hoist body via a support pin member. Each frame is provided with wheels that roll on guide rails, and one frame is provided with an electric motor that drives the wheels. Therefore, when moving the hoist body horizontally by moving the traversing device along the guide rails, all the wheels provided on both frames come into contact with the guide rails when the second frame swings. Thus, the running stability of the traversing device is improved. In addition, since all the wheels can be brought into contact with the guide rails without increasing the plane accuracy of the guide rails or the mounting accuracy of the wheels, all the wheels are uniformly worn, and the replacement frequency of the wheels is reduced. In addition, the manufacturing cost of the traversing device can be reduced.

1 is a perspective view showing a hoist crane provided with a hoist traverse device according to an embodiment of the present invention. It is a front view which shows the traverse apparatus for hoists shown by FIG. FIG. 3 is a left side view of FIG. 2. FIG. 2 is a partially cutaway plan view of FIG. 1. It is a top view which shows the conventional hoist traverse apparatus.

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

  The hoist crane shown in FIG. 1 is an inverter crane, and has a traverse guide rail 11 that guides the hoist body 10a in the X direction, that is, the horizontal direction by a traverse device 10b provided on the upper portion of the hoist body 10a. . Traveling devices 12 are respectively attached to both ends of the traverse guide rail 11, and each travel device 12 extends in a direction perpendicular to the traverse guide rail 11 and extends horizontally. 13 is guided in the Y direction. Therefore, the hoist body 10a moves in the X direction along the traverse guide rail 11 and moves in the Y direction along the travel guide rail 13, and can move along the horizontal plane. Each of the guide rails 11 and 13 is made of an I-shaped steel material, and has a vertical portion and flange portions that protrude on both sides in the width direction at upper and lower end portions of the vertical portion.

  As shown in FIG. 2, the hoist body 10 a has a body frame 14, and a rotating body, that is, a rotating drum is rotatably incorporated in the body frame 14. The rotating drum is driven to rotate by a winding electric motor 15 attached to the main body frame 14. The electric motor 15 is an induction motor. In order to decelerate and transmit the rotation of the output shaft of the electric motor 15 to the rotating drum, a speed reducer 16 is attached to the main body frame 14 as shown in FIG. A wire rope 17 is wound around the rotating drum, and a hook claw 19a to which a suspended load is attached is provided on a hook 19 provided with a movable pulley 18 around which the wire rope 17 is stretched.

  As shown in FIG. 3, the traversing device 10 b includes a first frame 21 and a second frame 22 that are arranged to face each other. The first frame 21 is a drive-side frame, and as shown in FIG. 4, the two wheels 23 on the drive side are displaced in the traveling direction of the guide rail 11 inside the first frame 21. It is installed freely. Each wheel 23 is rotatable by a bearing portion 24 attached to the inner surface of the first frame 21, and rolls on one flange portion on the lower side of the guide rail 11. In order to drive the wheel 23, an electric motor 25 is mounted on the first frame 21, and this electric motor 25 is composed of an induction motor, and this rotation is decelerated by the speed reducer 26 and transmitted to the wheel 23. . The second frame 22 is a driven frame, and two driven wheels 27 are mounted on the inner side of the second frame 22 so as to be shifted in the traveling direction of the guide rail 11. Each wheel 27 is rotatable by a bearing portion 28 attached to the inner surface of the second frame 22, and rolls on the other flange portion on the lower side of the guide rail 11.

  When the driving wheel 23 is driven by the electric motor 25, the hoist body 10a is moved in the X direction in FIG. On the other hand, the traveling device 12 shown in FIG. 1 is provided with an electric motor 29 for driving traveling wheels indicated by broken lines. When the traveling wheels are driven by the electric motor 29, the hoist body 10 a is moved to the traveling device 12. To move in the Y direction.

  As shown in FIG. 3, a first bracket 31 and a second bracket 32 that are parallel to each other and extend in the traveling direction are attached to the hoist body 10 a. The first frame 21 on the driving side is fixed to the first bracket 31 by two fixing pin members 33 as fixing members. Each fixing pin member 33 includes a bolt and a nut screwed to the bolt, and the first frame 21 is fixed to the first bracket 31 by fastening the nut to the bolt via a washer. . In addition, you may make it use other fastening members, such as a rivet, as a fixing member, without using a volt | bolt and a nut. Further, the number of fixing pin members 33 is not limited to two as long as it is a plurality.

  As shown in FIG. 2, the second frame 32 is attached to the second bracket 32 by a single support pin member 34 in the horizontal direction. The support pin member 34 penetrates the second frame 22, and the penetration position is a position between the two wheels 27 attached to the second frame 22. Thus, the second frame 22 is swingable by the support pin member 34 as indicated by an arrow A around the center.

  As shown in FIG. 4, the support pin member 34 includes a bolt 35 having a head portion 35 a and a nut 36 screwed to the head 35. The head portion 35 a abuts against the inner surface of the second bracket 32. A plurality of inner washers 37 are disposed between the second bracket 32 and the second frame 22, and a plurality of outer washers 38 are disposed between the nut 36 and the second frame 22. ing. A split pin 39 that engages with the nut 36 is attached to the bolt 35, and the split pin 39 prevents the nut 36 from loosening.

  The total thickness dimension of the inner washer 37 is set to be smaller by L than the gap dimension between the second frame 22 and the second bracket 32, and the second frame 22 is fastened to the second bracket 32. It has not been. As a result, the second frame 22 can swing around the support pin member 34. By changing the number of washers 37 and 38, the distance of the second frame 22 to the first frame 21 can be adjusted according to the width dimension of the guide rail 11. Similarly, the distance between both frames can be adjusted by changing the number of washers provided in the fixing pin member 33.

  As shown in FIG. 4, guide rollers 41 that rotate about the central axis in the vertical direction are rotatably provided at both ends in the traveling direction of the first frame 21, and each guide roller 41 is guided. The rail 11 comes into contact with the side surface of one flange portion. Similarly, guide rollers 42 that rotate about the central axis in the vertical direction are rotatably provided at both ends of the second frame 22 in the traveling direction, and each guide roller 42 is the other of the guide rails 11. It comes in contact with the side surface of the flange portion. When the hoist body 10a travels along the guide rail 11 by the traversing device 10b, the guide rollers 41 and 42 rotate in contact with the flange portion to guide the travel of the traversing device 10b.

  As shown in FIG. 1, the hoist body 10 a is provided with a hoist control unit 43, and an input operation unit 44 is attached to the hoist control unit 43. By operating a key or switch provided on the input operation unit 44, the hoist body 10a is instructed to lift or lower the suspended load, and in response to the instruction, driving electric power is applied to the electric motor 15. Is done. On the other hand, when the operation of the hoist body 10a is instructed by the operation of the input operation unit 44, driving electric power is applied to the electric motor 25, and when the travel operation of the hoist body 10a is instructed, the electric motor 29 is instructed. Is applied with driving power.

  When the hoist body 10a traverses along the guide rail 11 by the electric motor 25, even if the flange portion of the guide rail is deformed so as to wave in the vertical direction, the four wheels on the driving side and the driven side are Since the second frame 22 swings around the support pin member 34, the two wheels 27 provided on the second frame 22 are surely in contact with the flange portion of the guide rail 11. . As a result, the running stability of the traversing device 10b is enhanced, and the occurrence of a lifting phenomenon in which one of all the wheels 23, 27 leaves the guide rail 11 is prevented.

  FIG. 5 is a plan view showing a conventional traversing apparatus shown as a comparative example, and FIG. 5 shows a portion similar to FIG. 4 in the traversing apparatus of the present invention. In FIG. 5, members that are the same as those shown in FIG.

  Conventionally, the first frame 21 provided with two wheels 23 and the second frame 22 provided with two wheels 27 are both connected to each other by a connecting pin 45 and fixed to the hoist body. ing. Male screws are formed at both ends of each connecting pin 45, and a nut 46 is screwed to each male screw, and a split pin 47 attached to the connecting pin 45 is engaged with the nut 46. Each nut 46 is fastened to the frames 21 and 22 via washers 48.

  As described above, when the driving side and driven side frames 21 and 22 are fixed to the hoist body, in order for all the wheels 23 and 27 to contact the guide rail 11, the mounting accuracy of the two connecting pins 45 is increased. Need to increase. Moreover, when the flange portion of the guide rail 11 is deformed so as to wave in the vertical direction, three wheels out of the total of four wheels contact the guide rail 11, but the other one contacts the guide rail. It will float up from the guide rail.

  On the other hand, in the traversing device 10b of the present invention, the second frame 22 is swingable around the support pin member 34, so that the parallelism of the rotation center axes of all the wheels can be increased without increasing the parallelism. The wheel can be brought into contact with the guide rail 11. As a result, the traveling stability of the traversing device 10b is improved, and it is not necessary to increase the mounting accuracy of the support pin member 34 and the planar accuracy of the guide rail 11, and the manufacturing cost of the hoist crane including the guide rail 11 is reduced. be able to.

  In addition, the first frame 21 is fixed to a plate-like bracket 31 provided on the hoist body 10a, and the second frame 22 is attached to the plate-like bracket 32 provided on the hoist body 10a by a support pin member 34. Thus, the structure of the traversing device 10b can be simplified, and the manufacturing cost of the traversing device 10b can be reduced.

  In the illustrated traversing apparatus 10b, the frame 21 fixed to the hoist body 10a is the driving side on which the traverse electric motor 25 is provided, and the frame 22 swingably mounted on the hoist body 10a is the driven side. The electric motor 25 may be provided on the frame 22. In that case, the oscillating second frame 22 is on the driving side.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the hoist traversing device of the present invention, the driving side frame 21 and the driven side frame 22 are provided on the hoist body 10a one by one. You may make it provide in.

  DESCRIPTION OF SYMBOLS 10a ... Hoist main body, 10b ... Traversing device, 11 ... Guide rail, 12 ... Traveling device, 13 ... Guide rail, 14 ... Main body frame, 15 ... Electric motor, 16 ... Reduction gear, 17 ... Wire rope, 18 ... Dynamic pulley, DESCRIPTION OF SYMBOLS 19 ... Hook, 19a ... Hook nail | claw, 21 ... Frame, 21 ... 1st frame, 22 ... 2nd frame, 23 ... Wheel, 24 ... Bearing part, 25 ... Electric motor, 26 ... Reduction gear, 27 ... Wheel, DESCRIPTION OF SYMBOLS 28 ... Bearing part, 29 ... Electric motor, 31 ... 1st bracket, 32 ... 2nd bracket, 33 ... Fixed pin member, 34 ... Supporting pin member, 35 ... Bolt, 35a ... Head, 36 ... Nut, 37 , 38 ... washers, 39 ... split pins, 41 ... guide rollers, 42 ... guide rollers, 43 ... hoist control unit, 44 ... input operation unit.

Claims (4)

In the hoist traversing device that is provided on the upper part of the hoist body provided with a rotating body for hoisting and lowering the suspended load and travels along the guide rail,
A first frame provided with two wheels each rolling on the guide rail;
Two wheels each rolling on the guide rail, and a second frame disposed opposite the first frame;
A first bracket attached to the hoist body and to which the first frame is fixed;
A second bracket attached to the hoist body and supporting the second frame in a swingable manner by a support pin member penetrating between the two wheels provided in the second frame;
A hoist traversing device, comprising: a traverse electric motor provided on one of the first frame and the second frame and driving the wheel provided on the one frame.   2. The hoist traverse apparatus according to claim 1, wherein the electric motor is provided in the first frame, the wheel provided in the first frame is a driving side, and the wheel provided in the second frame. A hoist traversing device, characterized in that the driven side is a driven side.   The hoist traverse apparatus according to claim 1 or 2, wherein guide rollers that contact the side surfaces of the guide rails are provided at both ends of each frame in the running direction.   The hoist traverse apparatus according to any one of claims 1 to 3, wherein the guide rail is an I-shaped steel material or an H-shaped steel material.

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