JP2010095383A - Elevating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the irregular winding of a rope 17 by forming a small diameter winding drum 9 and a large diameter winding drum 16 each into recessed curve wherein axially center portion have the minimum diameter, and oppositely arranging the recessed portion of the large diameter winding drum 16 and an end surface of a guiding plate 23 which is the projecting portion matching the recessed portion of the large diameter winding drum 16 along an axis of the large diameter winding drum 16. <P>SOLUTION: A shaft 4 and a rotating shaft 14 are rotatably supported by a case 1. A small diameter gear 6 and a drive side clutch 7 are fixed to the shaft 4, and the small diameter winding drum 9 is integrally mounted to a driven side clutch 8. The shaft 4 is loosely inserted in shaft insertion holes 10 of the small diameter drum 9 and the driven side clutch 8. The small winding drum 9 and the large diameter winding drum 16 are formed in the hand drum shape having the recessed curve wherein an outer diameter of the axially center portion becomes the minimum diameter. The rope 17 is wound around the large diameter winding drum 16 and the small diameter winding drum 9, and attached with a weight 19 at one end and a load mounting tool 22 at the other end. The end surface of the guiding plate 23 is formed in the projecting curve matching the recessed curved of the large diameter winding drum 16, and oppositely arranged along the axis of the large diameter winding drum 16 through a clearance 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevating device used for lifting or unloading a load by a simple operation between positions having a height difference such as a steel tower or a building.

Conventionally, a lifting device has a lifting rope and a lifting rope winding means with reverse rotation prevention, and a transport carriage that can move along the guiding device is arranged, and the lifting device is installed in the guide device located at the upper part of the inclined surface. There has been proposed a heavy-duty carrying device that makes it possible to quickly and easily carry a heavy load on a radial slope by providing a rope fixing means (see, for example, Patent Document 1). Moreover, there exists a thing of patent document 2 as a manual type winding machine.
The invention described in Patent Document 1 relates to a transport device on a surface having a gradient such as a staircase, and has a drawback that a heavy object cannot be transported in an upward direction or a downward direction. The manual hoisting machine described in Patent Document 2 has a drawback in that it has a large number of components and causes high costs.
In view of the above-mentioned drawbacks of the prior art, the inventor of the present application provides a meshing clutch on the winding drum, and makes the arm and boom stand up or rotate in the front direction by tightening the rope, reducing the number of parts and reducing the cost. A highly safe lifting device was invented, patent application was filed as Japanese Patent Application No. 2003-405187, and a patent was obtained (for example, see Patent Document 3).
However, in the lifting device described in Patent Document 3, one end of the rope is fixedly wound around a large-diameter winding drum provided with flange portions at both ends of a winding drum made of a cylinder with the same diameter. Only the other end of the rope wound once around the trunk is configured to enter and exit from the case. Therefore, when the rope is wound around the large-diameter winding drum, there is a possibility that the rope may be irregularly wound around the winding drum portion of the large-diameter winding drum. When the rope becomes turbulent in the large-diameter winding drum, the component force of the winding force applied to the wound upper layer rope concentrates on one point of the lower rope, and the rope bites into the lower layer rope and unwinds. There was a problem that a situation that could not be performed smoothly occurred.
The invention described in Patent Document 4 has been proposed in order to prevent random winding around the winding body of the rope. In the invention described in Patent Document 4, the axially central portion of the winding body portion is formed on the concave curved surface having the smallest diameter constriction, thereby generating a component force due to the winding force of the wire in the tangential direction of the concave curved surface, The tangential direction gradually changes along the length of the concave curved surface, and each component force due to the winding force is dispersed without concentrating on one point. With the wire rod spool described in Patent Document 4, winding is started from a portion having the smallest outer diameter at the axially central portion of the winding drum portion. The winding is laterally fed slightly toward one flange portion, and then folded back and laterally fed toward the other flange portion. By repeating this transverse feed alternately, the rope is wound in layers on the concave portion of the concave curved surface. As the number of windings increases, the distance between the folded portions that reciprocate between the flange portions of the rope becomes longer, the upper layer portion approaches the flange portion, and the upper layer portion of the rope becomes substantially cylindrical. In other words, the rope has a narrow winding width on the outer peripheral surface of the winding drum portion at the beginning of winding (the distance between the folded portions of the rope is short), and the winding width increases according to the amount of winding the rope. (The distance between the folded parts of the rope is long).

By the way, assuming that the large-diameter winding cylinder described in Patent Document 3 is replaced with the drum-shaped winding cylinder described in Patent Document 4 having a concave curved surface having the smallest diameter at the center in the axial direction, the rope is large in winding. This is done by winding around a diameter winding drum, and the rope is wound around the outer peripheral surface of the large diameter winding drum in layers by winding the rope. A component force due to the winding force of the rope wound around the outer peripheral surface of the large-diameter winding drum of the concave curved surface is generated in the tangential direction of the concave curved surface, and each component force does not concentrate on one point and does not bite into each other. However, since all of the rope to be wound is wound around the large-diameter winding drum, there is a risk that the rope will wear and break due to friction between the ropes. There is a problem in that the outer peripheral surface of the trunk may slide in the center direction.
JP 07-267599 A Japanese Patent Publication No. 03-58998 Patent Publication No. 3858226 JP 2008-227220 A

  In order to solve the above-described problems of the prior art, the present invention provides a rope wound around a winding drum by forming the large-diameter winding drum into a drum shape having a concave curved surface with the smallest central portion in the axial direction. Disperse the component force due to the winding force of the wire without concentrating it on one point, and by holding a guide plate separated by a predetermined distance on the large-diameter winding drum, it is possible to hold a single winding of the wound rope, By attaching a weight to one end of the wound rope, the frictional force between adjacent ropes of the rope wound around the large diameter drum is increased, or the load attached to the other end of the rope is smoothly raised or I tried to descend.

In the invention according to claim 1 of the present invention, a shaft is rotatably mounted between the lower side walls in the case, and a small diameter gear and a driving side clutch are integrally attached to the shaft so as to rotate synchronously. A shaft insertion hole is provided in an axial direction inside a driven side clutch provided with a winding drum, the shaft is loosely inserted into the shaft insertion hole, and a small diameter winding drum is connected to the driven side clutch together with the driven side clutch. An urging means for urging in the clutch direction is provided, and the small-diameter winding drum is formed in a different-diameter cylinder formed in a concave curved surface so that the outer peripheral surface of the winding drum portion has the smallest diameter in the axial center. A rotating shaft is rotatably installed between the upper side walls of the motor, and a large-diameter winding drum and a large-diameter gear meshing with the small-diameter gear are integrally attached to the rotating shaft so as to rotate synchronously with the rotating shaft, Large diameter drum is wound In order to prevent random winding of the rope wound around the large-diameter winding drum, the outer peripheral surface of the portion is formed in a different-diameter cylinder formed in a concave curved surface so that the central portion in the axial direction has the smallest diameter. A guide plate having a lower end surface formed on a convex curved surface that follows the curve of the outer peripheral surface of the concave curved surface of the diameter winding drum, the lower end surface of the guide plate is spaced a predetermined distance upward along the axis of the large diameter winding drum. The rope is wound around a small diameter drum and wound around a large diameter drum, and a weight is attached to one end of the rope suspended from the large diameter drum. A load can be attached to the other end of the suspended rope, and the rope moves around the smallest diameter portion of the large-diameter winding drum to one concave curved surface or the other concave curved surface of the large-diameter winding drum. The load is raised or lowered.
In the invention according to claim 2 of the present invention, a shaft is rotatably mounted between upper side walls in the case, and a small diameter gear and a driving side clutch are integrally attached to the shaft so as to rotate synchronously. A shaft insertion hole is provided in an axial direction inside a driven side clutch provided with a winding drum, the shaft is loosely inserted into the shaft insertion hole, and a small diameter winding drum is connected to the driven side clutch together with the driven side clutch. An urging means for urging in the clutch direction is provided, and the small-diameter winding drum is formed in a different-diameter cylinder formed in a concave curved surface so that the outer peripheral surface of the winding drum portion has the smallest diameter in the axial center. A rotary shaft is rotatably installed between the lower side walls of the first and second rotary shafts, and a large-diameter winding drum and a large-diameter gear meshing with the small-diameter gear are integrally attached to the rotary shaft so as to rotate synchronously with the rotary shaft, Large diameter drum is wound In order to prevent random winding of the rope wound around the large-diameter winding drum, the outer peripheral surface of the portion is formed in a different-diameter cylinder formed in a concave curved surface so that the central portion in the axial direction has the smallest diameter. A guide plate having an upper end surface formed on a convex curved surface that follows the curve of the outer peripheral surface of the concave curved surface of the diameter winding drum is spaced a predetermined distance below the upper end surface of the guide plate along the axis of the large diameter winding drum. The rope is wound around a small-diameter winding drum and wound around a large-diameter winding drum, drawn upward from the large-diameter winding drum, suspended on a pulley and suspended at one end of the rope. A weight is attached, and a load can be attached to the other end of the rope drawn from the small-diameter winding drum, suspended on the pulley and suspended, and the rope has a large-diameter winding drum centered on the smallest diameter portion of the large-diameter winding drum. The load is raised or lowered by winding and moving to one concave curved surface or the other concave curved surface. To.

In the invention of the present application, the end surface of the guide plate having the same convex portion as the concave surface of the concave surface of the large-diameter winding drum is formed at a predetermined distance along the axis of the large-diameter winding drum. Since the ropes are arranged facing each other at a distance, the rope is wound in one layer without winding up, and the winding is moved from one side of the concave curved surface to the other around the smallest diameter part of the large diameter drum. There is an effect that can be raised or lowered.
Since the rope is wound around the curved surface of the large-diameter winding drum, each component of the winding force from the weight of the rope being wound does not concentrate on one point, and the adjacent side surfaces of the wound rope Since the frictional force is applied to the contact surface with the rope in the downward direction on the inclined surface, the large-diameter winding cylinder does not rotate freely, and the large-diameter winding cylinder rotates. The rope moves smoothly, and the load can be easily raised or lowered. As a result, the large-diameter winding drum can be reduced in weight.
In addition, since a weight is attached to one end of the rope, when the rotation of the shaft by the handle or motor is stopped, the load stops moving downward due to the friction between the ropes wound around the large diameter drum, and the height direction is constant. Hold position.

  By forming the winding cylinder into a different-diameter cylinder formed in a concave curved surface so that the outer peripheral surface of the winding drum portion has the smallest diameter in the center in the axial direction, random winding of the rope is prevented, and the concave curved surface of the large diameter winding drum is prevented. The end face of the guide plate having the same convex part as that of the concave part as the end face is disposed oppositely along the axis of the large-diameter winding drum, thereby preventing the lateral movement of the single-layered rope. In addition, since both ends of the rope are suspended and a weight is attached to one end of the rope and a load is attached to the other end of the rope, the rope is smoothly smoothed by friction between adjacent ropes wound around the large-diameter winding drum. Moved and the load could be raised or lowered smoothly.

A first embodiment shown in FIGS. 1 to 6 will be described.
First, in FIGS. 1 to 3, bearings 2 and 3 are provided on the lower inner surface of the side wall of the case 1 at positions facing each other, and a shaft 4 is rotatably supported on the bearings 2 and 3. One end of the shaft 4 passes through the side wall of the case 1 and is connected to the handle 5. A small diameter gear 6 and a driving side clutch 7 are fixedly attached to the shaft 4 so that the small diameter gear 6 and the driving side clutch 7 rotate in synchronization with the shaft 4. A small diameter drum 9 is integrally attached to the driven clutch 8. The small-diameter winding drum 9 is formed in a concave curved surface with the outer diameter of the winding drum portion having the smallest outer diameter in the axial direction, and has a drum-like appearance as a whole. A flange portion 91 is provided continuously at the end of the small diameter drum 9 opposite to the driven clutch 8. A shaft insertion hole 10 is provided through the shaft center portion of the small diameter drum 9 and the driven clutch 8 along the axial direction. The shaft 4 is loosely inserted into the shaft insertion hole 10. The small diameter winding drum 9 has urging means for urging the small diameter winding drum 9 in the direction of the driving side clutch 7. In the first embodiment, a coil spring 11 that biases the shaft 4 between the bearing 3 and the flange portion 91 of the shaft 4 in the direction of the driving side clutch 7 is wound and used as a biasing means.

  Bearings 12 and 13 are provided on the upper inner surface of the side wall of the case 1 at positions facing each other. A rotary shaft 14 is rotatably mounted on the bearings 12 and 13. The rotating shaft 14 is disposed so as to have a parallel positional relationship with a predetermined distance apart in the upward direction of the shaft 4. A large-diameter gear 15 that meshes with the small-diameter gear 6 and a large-diameter winding drum 16 are integrally attached to the rotary shaft 14. The large diameter drum 16 is fixedly attached to the rotary shaft 14 so as to be positioned right above the small diameter winding 9. The large-diameter winding drum 16 is provided with a pair of flange portions at both ends of the winding drum portion, and the winding drum portion is formed as a concave curved surface with the outer diameter of the winding drum portion having the smallest outer diameter in the axial direction. The appearance of the shape.

  The rope 17 is wound around the large-diameter winding drum 16 and the small-diameter winding drum 9, and a weight 19 is attached to one end of the rope 17 hanging from the large-diameter winding drum 16 through the bottom opening of the case 1. A load attachment 22 to which the load 21 can be attached and detached is attached to the other end of the hanging rope 17. Specifically, the rope 17 having the weight 19 attached to one end and the load fitting 22 attached to the other end is in a state where one end and the other end of the rope 17 are suspended, and the large-diameter winding drum 16 from one end side of the rope 17. Of the small-diameter winding drum 9 is wound several times from the inclined surface on the opposite side to the large-diameter gear 15 side around the smallest central diameter portion in the axial direction. From the position directly above the minimum diameter portion of the central portion of the winding drum section in the axial direction to the minimum diameter portion position of the central portion of the small diameter winding drum 9 in the axial direction of the winding drum portion, Wound once in position. In the first embodiment, the number of windings on the large diameter drum 16 is six. The number of turns of the rope 17 to the large-diameter winding drum 16 is sufficient when the weight 19 is heavy, and the number of turns is sufficient when the weight 19 is light, and the friction force of the rope 17 is increased. . When attaching a heavy load 21 to the load fixture 22, the number of turns of the rope 17 to the large diameter drum 16 is artificially increased, and the rope 17 having a large outer diameter is used. Also use a heavy one. Further, the outer diameter of the large diameter drum 16 is constant, but the axial length of the large diameter drum 16 is increased. As described above, the outer diameter of the rope 17 is determined by the weight of the load 21 to be suspended. Experimentally, when the weight of the load 21 is 1500 kg, the load 21 is lifted without disconnection even when the rope 17 having an outer diameter of 5.5 mm is used. From this experimental result, when the weight of the load 21 exceeds 1500 kg, the rope 17 having an outer diameter exceeding 5.5 mm may be used. The outer diameter of the rope 17 is generally about 5.5 to 8.0 mm. A hook 18 is attached to the outer surface of the upper side wall of the case 1.

  The lower end surface of the guide plate 23 is formed as a convex curved surface having the same shape as the concave curved surface of the winding drum portion of the large diameter winding drum 16, and the lower end surface of the guide plate 23 is along the axis of the large diameter winding drum 16. It is arranged so as to face the outer peripheral surface of the large-diameter winding drum 16 with a gap 24 therebetween. As shown in FIGS. 1 to 3, in Example 1, the upper end of the guide plate 23 is attached to the upper side wall (ceiling side wall) of the case 1. The distance of the gap 24 depends on the outer diameter of the rope 17, but as a result, it is sufficient if the rope 17 can be prevented from side-sliding and can be wound further, and the outer diameter of the rope 17 is preferably about 0.1 to 3.0 mm. It is. The reason why the guide plate 23 is provided above the large-diameter winding drum 16 via the gap 24 is that the ropes 17 are held one layer without overlapping each other or being multi-layered.

The use state and operation of the lifting device of Embodiment 1 will be described with reference to FIGS.
First, the case where the load 21 attached to the load attachment 22 is lifted will be described. As shown in FIG. 6, the hook 18 is hooked on the horizontal member 27 of the steel tower 26, and the case 1 is suspended from the steel tower 26. The other end of the rope 17 is lowered, and the load 21 is attached to the load attachment 22 in a state where the rope 17 is wound from the smallest diameter portion to the large diameter gear 15 side in the large diameter winding drum 16 shown in FIG. As shown by the arrow in FIG. 1, when the handle 5 is rotated in the counterclockwise direction, the small diameter gear 6 and the driving side clutch 7 together with the shaft 4 rotate in the same direction as the handle 5. The meshing state of the driving side clutch 7 and the driven side clutch 8 is released, and the square claw of the driving side clutch 7 moves along the inclining inclined surface formed between the pawls of the driven side clutch 8, and the driving side clutch 7 The driven clutch 8 moves in the direction of the bearing 3 according to the pressure contact position between the square pawl 7 and the inclined surface of the driven clutch 8, and the coil spring 11 is compressed. The power of the handle 5 is transmitted to the large diameter gear 15 by the small diameter gear 6. The rotation of the small-diameter gear 6 in the counterclockwise direction as viewed from the handle 5 side is transmitted to the large-diameter gear 15 as the clockwise rotation, and the rotation shaft 14 is rotated in the clockwise direction as viewed from the handle 5 side. The large diameter drum 16 also rotates in synchronization with the rotating shaft 14. As shown in FIG. 4, the rope 17 wound around the large-diameter winding drum 16 out of the rope 17 moves on the inclined surface of the large-diameter winding drum 16 to the bearing 13 while being wound around the large-diameter winding drum 16. One end of the rope 17 to which the weight 19 is attached moves to the bearing 13 side from the smallest diameter portion of the large diameter drum 16 and is in the state shown in FIG. The load 21 rises with the rope 17 wound around the large diameter drum 16. The rope 17 hangs down from the smallest diameter portion of the concave curved surface of the large-diameter winding drum 16 to the inclined surface on the bearing 13 side in the state of being wound around the same number of turns as before the load 21 is lifted. The provided weight 19 descends. The convex bottom curved surface shape of the guide plate 23 and the concave curved surface shape of the large-diameter winding drum 16 are formed on the same opposite curved surface, and the gap 24 is formed to have an outer diameter of the rope 17 of about +0.1 to 3.0 mm. Therefore, when the rope 17 tries to skid on the circumferential surface of the large-diameter winding drum 16 toward the minimum diameter portion, the lower surface of the guide plate 23 is caught by the rope 17 to be moved to prevent the skidding. One-layer winding around the large diameter drum 16 is held.
Next, the case where the load 21 is lowered will be described. The load 21 is attached to the load attachment 22 in a state where the rope 17 shown in FIG. 2, when the handle 5 is rotated clockwise, the small-diameter gear 6 and the driving side clutch 7 together with the shaft 4 rotate in the same clockwise direction as the handle 5, and the driving side clutch 7 and the driven side clutch are rotated. 8 meshes. Due to the restoring force of the coil spring 11, the square claw of the driving side clutch 7 is engaged with the valley of the driven side clutch 8. The shaft 4 and the small diameter gear 6 rotate synchronously, and the large diameter gear 15 rotates in the opposite direction to the small diameter gear 6. Since the large-diameter gear 15 and the large-diameter winding drum 16 are fixed to the rotating shaft 14, the large-diameter gear 15, the large-diameter winding drum 16, and the rotating shaft 14 rotate synchronously. The rope 17 wound around the large-diameter winding drum 16 moves from the minimum diameter portion of the large-diameter winding drum 16 toward the minimum diameter portion of the small-diameter winding drum 9 and is sent out from the lower opening of the case 1 to the outside. The load 21 attached to the other end of the rope 17 descends together with the rope 17. When the load 21 descends, as shown in FIG. 5, the rope 17 that is wound around the large-diameter winding drum 16 of the rope 17 and is suspended and has a weight 19 attached to one end is suspended from the smallest diameter portion of the large-diameter winding drum 16. Then, the state shown in FIG. 2 is obtained.
Further, when the hand is released from the handle 5, the load 21 attached to the other end of the rope 17 is stopped, and a stable stop state is maintained at a fixed position in the height direction. Since the large diameter drum 16 is formed in a different diameter cylinder formed in a concave curved surface so that the central portion in the axial direction has the smallest diameter, and the guide plate 23 is provided, the frictional force between the ropes 17 is reduced. This is because the rope 17 does not move even when the hand is released from the handle 5.

  A second embodiment shown in FIG. 7 will be described. The difference from the first embodiment is that the motor shaft 29 of the motor 28 is connected to the shaft 4 so that the motor shaft 29 and the shaft 4 rotate synchronously. Further, the motor 28 can be operated from a place away from the motor by a remote control operation (not shown).

  A third embodiment shown in FIGS. 8 and 9 will be described. Bearings 31 and 32 are provided on the upper inner surface of the side wall of the case 30, and a shaft 33 is rotatably supported by the bearings 31 and 32. One end of the shaft 33 passes through the side wall of the case 30 and is connected to the handle 34. One end of the shaft 33 is not limited to the case where it is connected to the handle 34, but it is also included in the present invention that it is connected to the motor shaft of the motor provided outside the case 30 to transmit the drive of the motor to the shaft 33. Is done. It is better to control the motor drive with a remote control. A small diameter gear 35 and a driving side clutch 36 are fixedly attached to the shaft 33 so that the small diameter gear 35 and the driving side clutch 36 rotate in synchronization with the shaft 33. A small diameter winding drum 38 is integrally attached to the driven side clutch 37. The small-diameter winding drum 38 is formed in a concave curved surface with the outer peripheral surface of the winding drum portion having the smallest outer diameter in the axial direction, and has a drum-like appearance as a whole. A flange portion 39 is provided continuously at the end of the small diameter drum 38 opposite to the driven clutch 37. A shaft insertion hole is provided through the shaft center portion of the small diameter drum 38 and the driven clutch 37 along the axial direction. A shaft 33 is loosely inserted into the shaft insertion hole. The small diameter winding drum 38 has urging means for urging the small diameter winding drum 38 in the direction of the driving side clutch 36. In the third embodiment, a coil spring 40 that biases in the direction of the small diameter drum 38 is wound between the bearing 32 and the flange portion 39 of the shaft 33 to serve as a biasing means.

  Bearings 41 and 42 are provided on the inner surface of the lower portion of the side wall of the case 30 at positions facing each other. A rotary shaft 43 is rotatably mounted on the bearings 41 and 42. The rotating shaft 43 is disposed so as to be parallel to the shaft 33 with a predetermined distance in the downward direction. A large-diameter gear 44 that meshes with the small-diameter gear 35 and a large-diameter winding drum 45 are integrally attached to the rotary shaft 43. The large diameter drum 45 is fixedly attached to the rotary shaft 43 so as to be positioned right above the small diameter winding 38. The large-diameter winding drum 45 is provided with a pair of flange portions at both ends of the winding drum portion, and the winding drum portion is formed as a concave curved surface with the outer diameter of the central portion of the winding drum being the smallest in the axial direction. The appearance of the shape.

  The rope 46 is wound around the large-diameter winding drum 45 and the small-diameter winding drum 38, pulled out from the large-diameter winding drum 45 through the upper wall surface (ceiling surface) opening of the case 30, suspended around the pulley 48, and having a weight at one end. 49 is attached. The rope 46 drawn from the small diameter drum 38 through the upper wall (ceiling surface) opening of the case 30 is suspended by a pulley 51, and a load attachment 53 to which a load 52 can be attached and detached is attached to the other end. . Specifically, the rope 46 with the weight 49 attached to one end and the load attachment 53 attached to the other end is suspended by the pulley 48 and the pulley 51, and the one end and the other end are suspended. Winding several times in the direction of the axial minimum central portion from the inclined surface on the opposite side to the large diameter gear 44 centering on the axial minimum central diameter portion of the large cylindrical drum 45 from one end side The small-diameter winding drum 38 is wound from the position directly above the minimum diameter portion in the axial direction central portion of the small-diameter winding drum 38 to the minimum-diameter position in the central portion of the small-diameter winding drum 38 in the axial direction. It is wound once at the position of the minimum diameter portion at the central portion in the axial direction, pulled out from the upper side of the case 30 and suspended around the pulley 51. The pulleys 48 and 51 are respectively suspended from the horizontal member 27 of the steel tower 26.

  The guide plate 54 is formed such that the upper end surface of the guide plate is a convex curved surface having the same shape as the concave curved surface of the winding body portion of the large diameter winding drum 45, and the upper end surface of the guide plate is above the axis of the large diameter winding drum 45. Is disposed so as to face the outer peripheral surface of the large-diameter winding drum 45 with a gap 55 interposed therebetween.

  In the third embodiment, the case 30 is installed on the ground or the like, and the load 52 is moved up and down. The handle 34 is rotated clockwise to release the meshing state of the driving side clutch 36 and the driven side clutch 37. The square pawl of the driving side clutch 36 moves along an inclining inclined surface formed between the pawls of the driven side clutch 37, and the square pawl of the driving side clutch 36 and the inclined surface of the driven side clutch 37 are pressed against each other. The driven clutch 37 moves in the direction of the bearing 32 according to the position, and the coil spring 40 is compressed. The power of the handle 34 is transmitted from the small diameter gear 35 to the large diameter gear 44. The rotational movement of the small-diameter gear 35 is transmitted to the large-diameter gear 44 as rotation in the direction opposite to the rotational direction of the small-diameter gear 35, and rotates the rotating shaft 43 counterclockwise. The large diameter drum 45 also rotates synchronously with the rotating shaft 43. Due to the rotation of the large diameter drum 45, the other end of the rope 46 to which the load 52 is attached is wound around the peripheral surface of the large diameter drum 45 through the hole 50, and the load 52 rises. The rope 46 is drawn from the position wound around the inclined surface closest to the bearing 42 of the concave curved surface of the large-diameter winding drum 45 to the outside of the case 3, suspended from the pulley 48 and suspended, and provided at the end. The weight 49 is lowered. The upper end convex curved surface shape of the guide plate 54 and the concave curved surface shape of the large-diameter winding drum 45 are formed on the same opposite curved surface, and the gap 55 is formed to have an outer diameter of the rope 46 of about 0.1 to 3.0 mm. Therefore, the rope 46 does not move on the peripheral surface of the large-diameter winding drum 45 toward the minimum diameter portion. Due to the presence of the pulleys 48 and 51, the winding force applied to the small-diameter winding drum 38 and the large-diameter winding drum 45 is halved, and there is an effect that it is possible to lift and lower a heavy load.

It is explanatory drawing which shows the structure of the winding apparatus used for the raising / lowering apparatus of the state which raises a load. (Example 1) It is explanatory drawing which shows the structure of the winding apparatus used for the raising / lowering apparatus of the state which descend | falls a load. (Example 1) It is explanatory drawing which shows the positional relationship of a large diameter winding drum, a guide plate, and a rope. (Example 1) It is a figure explaining the winding movement state of the rope of the large diameter winding drum peripheral surface in the case of raising a load. (Example 1) It is a figure explaining the winding movement state of the rope of the large diameter winding drum peripheral surface in the case of dropping a load. (Example 1) It is explanatory drawing which shows the state used for the steel tower. (Example 1) It is explanatory drawing which shows the structure of the winding apparatus used for the raising / lowering apparatus of the state which raises a load. (Example 2) It is explanatory drawing which shows the structure of the winding apparatus used for the raising / lowering apparatus of the state which raises a load. (Example 3) It is explanatory drawing which shows the state used for the steel tower. (Example 3)

Explanation of symbols

1, 30 Case 4, 33 Shaft 6, 35 Small-diameter gear 7, 36 Drive-side clutch 8, 37 Drive-side clutch 9, 38 Small-diameter winding drum 10 Shaft insertion hole 14, 43 Rotating shaft 15, 44 Large-diameter gear 16, 45 Large Diameter drum 17, 46 Rope 19, 49 Weight 21, 52 Load 23, 54 Guide plate 48, 51 Pulley

Claims (2)

A shaft is rotatably installed between the lower side walls in the case, and a small-diameter gear and a driving-side clutch are integrally attached to the shaft so as to rotate synchronously, and the shaft is provided inside a driven-side clutch having a small-diameter winding drum. An insertion hole is provided penetrating in the axial direction, the shaft is loosely inserted into the shaft insertion hole, and a biasing means for biasing the small diameter winding drum together with the driven side clutch in the direction of the driving side clutch is provided in the small diameter winding drum. The small-diameter winding drum is formed in a different-diameter cylinder formed in a concave curved surface so that the outer peripheral surface of the winding drum portion has the smallest diameter in the axial center.
A rotating shaft is rotatably installed between the upper side walls in the case, and a large-diameter winding drum and a large-diameter gear meshing with the small-diameter gear are synchronously rotated with the rotating shaft. Mounting, the large-diameter winding drum is formed in a different-diameter cylinder formed in a concave curved surface so that the outer peripheral surface of the winding drum portion is the smallest in the axial center,
In order to prevent random winding of the rope wound around the large-diameter winding drum, a guide plate having a lower end surface formed on a convex curved surface that follows a curve of the outer peripheral surface of the concave curved surface of the large-diameter winding drum, A lower end surface of the plate is disposed to face and be spaced a predetermined distance upward along the axis of the large diameter drum.
The rope is wound around the small-diameter winding drum and wound around the large-diameter winding drum. A weight is attached to one end of the rope suspended from the large-diameter winding drum, and the other end of the rope suspended from the small-diameter winding drum is attached to the rope. Makes the load available for installation and
The rope is wound or moved to one concave curved surface or the other concave curved surface of the large-diameter winding drum around the minimum diameter portion of the large-diameter winding drum, so that the load is raised or lowered. lift device. A shaft is rotatably installed between upper side walls in the case, and a small-diameter gear and a driving-side clutch are integrally attached to the shaft so as to rotate synchronously, and the shaft is provided inside a driven-side clutch having a small-diameter winding drum. An insertion hole is provided penetrating in the axial direction, the shaft is loosely inserted into the shaft insertion hole, and a biasing means for biasing the small diameter winding drum together with the driven side clutch in the direction of the driving side clutch is provided in the small diameter winding drum. The small-diameter winding drum is formed in a different-diameter cylinder formed in a concave curved surface so that the outer peripheral surface of the winding drum portion has the smallest diameter in the axial center.
A rotating shaft is rotatably installed between the lower side walls in the case, and a large-diameter winding drum and a large-diameter gear meshing with the small-diameter gear are integrally rotated on the rotating shaft so as to rotate synchronously with the rotating shaft. Mounting, the large-diameter winding drum is formed in a different-diameter cylinder formed in a concave curved surface so that the outer peripheral surface of the winding drum portion is the smallest in the axial center,
In order to prevent random winding of the rope wound around the large-diameter winding drum, a guide plate having an upper end surface formed on a curved surface that follows the curve of the outer peripheral surface of the concave curved surface of the large-diameter winding drum, The upper end surface of the plate is disposed facing the lower side along the axis of the large-diameter winding cylinder by a predetermined distance,
The rope is wound around a small-diameter winding drum and wound around the large-diameter winding drum, and a weight is attached to one end of the rope drawn upward from the large-diameter winding drum and suspended by a pulley. It is possible to attach a load to the other end of the rope that is pulled out from and suspended by the pulley.
The rope is wound or moved to one concave curved surface or the other concave curved surface of the large-diameter winding drum around the minimum diameter portion of the large-diameter winding drum, so that the load is raised or lowered. lift device.

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