JP2016041617A - Hoist - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hoist including a rope terminal attachment device which achieves improvement of structural reliability with an inexpensive structure.SOLUTION: A hoist includes: a rope 3; a winding drum which winds up the rope; outer frames provided at both end parts of the winding drum; support plates 7 which are provided at the outer frame, make a pair, and face each other; a support shaft 11 connected with the support plates; a hanging fixture 12 rotatably attached to the support shaft 11; and a main sheave 13 for rope terminal attachment which is attached to the hanging fixture. The rope is wound around the main sheave for the rope terminal attachment. One end part of the rope is attached to a rope end attachment part 13A of the main sheave for the rope terminal attachment. The other end of the rope is hung down on a vertical axis positioned at a center of the hanging fixture when viewed in a horizontal direction.SELECTED DRAWING: Figure 1

Description

  The present invention is a hoisting machine provided with a rope end attachment device.

  As a background art in this technical field, there is JP-A-63-96496 (Patent Document 1). This publication states that “the reliability of the other end of the rope is improved with respect to the impact value and load overload when the load is lifted. The impact value and overload when the load is lifted and the repetition thereof. The reliability of the other end of the rope can be greatly improved with respect to use, and there is no unreasonable contact between the other end of the rope and the flange of the sheave. It is possible to provide a hoisting machine capable of supporting a load ”(see abstract).

Japanese Patent Laid-Open No. 63-196396

  In the hanging metal fitting that constitutes Patent Document 1, stress concentration due to an unbalanced load occurs on the rope winding start side of the bent portion during the hoisting operation, and thus a reinforcing plate is provided to reinforce the stress generation region. It costs money to install. In addition, since the support plate that supports the hanging bracket also receives an unbalanced load, the support plate needs to be enlarged or reinforced. Also, in order to obtain the structural reliability of the hoisting machine, it is necessary to give sufficient consideration to safety.

  Then, an object of this invention is to provide the winding machine provided with the rope terminal attachment apparatus which can improve structural reliability with an inexpensive structure.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-described problems. For example, a hoisting machine includes a rope, a winding drum for winding the rope, and both ends of the winding drum. An outer frame provided; a pair of support plates opposed to each other provided in the outer frame; a support shaft coupled to the support plate; a suspension fitting rotatably attached to the support shaft; A rope end mounting main sheave attached to a hanging metal fitting, and the rope is wound around the rope end mounting main sheave, and one end of the rope is a rope of the rope end mounting main sheave 13 The other end of the rope is attached to the end attaching portion and is suspended on a vertical axis located at the center in the horizontal direction of the hanging bracket.

  The present invention can provide a hoisting machine provided with a rope end attachment device that improves structural reliability with an inexpensive configuration.

It is a front view of the rope terminal attachment apparatus of the winding machine concerning an Example. It is one side view of the rope terminal attachment apparatus concerning an Example. It is the other side view of the rope terminal attachment apparatus concerning an Example. It is a front view of the main sheave for rope end attachment of the rope end attachment device concerning an example. It is a side view of the main sheave for rope terminal attachment of the rope terminal attachment device concerning an example. It is a figure at the time of a rope terminal being pulled out by the rope terminal attachment apparatus concerning an Example. It is a figure which attaches a rope and an auxiliary sheave to the main sheave for rope end attachment of the rope end attachment device concerning an example. It is a side view of the whole winding machine.

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

  An embodiment of the present invention will be described with reference to FIGS. First, the overall configuration of the hoist 1 will be described with reference to FIG. One end of the rope 3 is attached to the winding drum 2 of the hoisting machine 1, and the other end of the rope 3 is fixed to the socket 4.

  The socket 4 is attached to a rope end attachment device 8 attached to an intermediate portion between two support plates 7 provided on the outer frame 6 of the hoisting machine 1. The outer frame 6 and the support plate 7 are made of steel plates. The support plate 7 constitutes a part of the outer frame 6.

  The hook block 5 is provided at a lower position of the winding drum 2 so as to be movable in the winding and lowering direction via the rope 3, and a load is suspended on the hook block 5. The control box 9 containing the electric parts is attached to the end of the support plate 7 opposite to the winding drum 2. The operation of the hoist 1 is controlled by the control device in the control box 9.

  A limit lever 10 is attached to a part of the lower end portion of the support plate 7, and the limit lever 10 extends to a position above the hook block 5. Thus, when the hook block 5 is lifted and comes into contact with the limit lever 10, the operation circuit in the hoisting direction is cut and the lifting of the hook block 5 is stopped.

  Next, the configuration of the rope terminal attachment device 8 will be described based on FIGS. 1 to 7. FIG. 1 is a front view of a rope end attachment device for a hoist according to the present invention. FIG. 2 is a side view of one side of the rope end attachment device. FIG. 3 is a side view of the other side of the rope end attachment device shown in FIG. FIG. 4 is a front view of the main sheave for attaching the rope end. FIG. 5 is a side view of the main sheave for attaching the rope end. FIG. 6 is a view of the rope end attachment device shown in FIG. 1 with the rope end pulled out. FIG. 7 is a view of attaching the rope and the auxiliary sheave to the main end sheave for attaching the rope end shown in FIG.

  As shown in FIG. 1, a shaft 11 is inserted through and attached to two support plates 7 provided on the outer frame 6 described above. A key plate 15 is fixed to one of the two opposing support plates 7 with bolts 16 so that the key plate 15 contacts a part of the shaft 11 so that the shaft 11 does not come off the support plate 7. Locked. A suspension fitting 12 formed by bending a plate-like member into a U shape is suspended from the shaft 11 so as to be freely rotatable.

  As shown in FIG. 2, the hanging metal fitting 12 includes a bent portion 37 that is a U-shaped concave portion and a straight portion that extends in a pair from the bent portion 37. Is formed with an opening so as to communicate the pair of straight portions. The hanging bracket 12 is attached with the bent portion 37 hung on the shaft 11.

  A rope end-attaching main sheave 13 (hereinafter simply referred to as main sheave 13) is disposed between the pair of straight portions of the hanging metal fitting 12. The main sheave 13 is provided with a load support hole 35 at a position in the center of the circular diameter of the main sheave 13. The main sheave 13 is formed by the pin 14 penetrating the opening of the suspension fitting 12 and the load support hole 35. It is rotatably attached to the hanging bracket 12.

  A key plate 17 is fixed to the hanging bracket 12 with bolts 18 for preventing the pins 14 from being removed. The key plate 17 is in contact with a part of the pin 14 and is locked so that the pin 14 does not come off from the hanging bracket 12. Further, as shown in FIG. 4, the main sheave 13 has an arc shape, and by providing a flat portion 26 formed in the horizontal direction from the end portion of the arc, the unnecessary sheave 13 is omitted and the main sheave 13 is reduced in weight. Can be planned.

  Further, as shown in FIG. 1, FIG. 4 or FIG. 5, a U groove 27 and a flange 28 are formed on the outer peripheral side surface portion of the main sheave 13. To the vertical U-groove 27A and the vertical flange 28A. A loosening prevention metal fitting 24 is fixed to the vertical flange 28 </ b> A with a bolt 25.

  On the lower end side of the vertical flange 28 </ b> A, a terminal portion 13 </ b> A that protrudes downward from the planar portion 26 and is integrally formed with the planar portion 26 is formed. A vertical U groove 27A and a vertical flange 28A are connected to the terminal portion 13A, and a socket attaching / detaching vertical groove 32 is formed. Further, a socket mounting seat 34 having a ball seat surface 33 connected to the socket attaching / detaching vertical groove 32 and formed by a cylindrical hole is formed. Note that the attachment of the rope to the configuration of the main sheave 13 will be described later.

  The main sheave 13 is attached so that the center axis of the shaft 11 and the center line of the U groove 27 are on the same plane. Further, as shown in FIGS. 1 and 2, the main sheave 13 is attached such that the center of the shaft 11 in the horizontal (length) direction and the center of the pin 14 in the length direction substantially coincide with each other in the vertical direction. Yes.

  As shown in FIG. 4, a pair of auxiliary sheave mounting plates 19 are provided integrally with the main sheave 13 and project vertically downward. A load supporting hole is provided at the tip of the auxiliary sheave mounting plate 19. 36 is formed.

  An auxiliary sheave 20 is arranged between the pair of auxiliary sheave mounting plates 19 as shown in FIG. As shown in FIG. 7, the auxiliary sheave 20 is formed with a load supporting hole 40, and the auxiliary sheave 20 passes through the load supporting hole 36 of the auxiliary sheave mounting plate 19 and the load supporting hole 40 of the auxiliary sheave 20. The pin 21 is rotatably attached to the auxiliary sheave attachment plate 19. A key plate 22 is fixed to the auxiliary sheave mounting plate 19 with bolts 23 for preventing the pins 21 from being pulled out. The key plate 22 is in contact with a part of the pin 21 and is locked so that the pin 21 does not come off the auxiliary sheave mounting plate 19.

  Further, as shown in FIG. 1, a U-shaped groove 30 and a flange 31 are formed on the outer peripheral side surface portion of the disk portion of the auxiliary sheave 20.

  Next, the rope end attachment device and the attachment of the rope according to the present embodiment will be described. As shown in FIG. 1, the rope 3 is wound from the U groove 27 of the main sheave 13 to the vertical U groove 27 </ b> A and inserted into the socket attaching / detaching vertical groove 32, and then the winding start side hanging on the U groove 30 of the auxiliary sheave 20. By pulling the rope 3, the socket 4 is mounted on the socket mounting seat 34. It is desirable that the rope 3 is wound around the main sheave 13 by a half turn or more to attach the socket 4 to the socket mounting seat 34.

  In order to prevent the rope 3 from coming off from the socket mounting seat 34 due to the slack of the rope 3, the slack stopper 24 is fixed to the vertical flange 28A with bolts 25 so as to hold the rope 3. By inserting the rope 3 into the main sheave 13 and the auxiliary sheave 20 in the suspended metal fitting 12 and locking them with the pins 14, the key plate 17 is fixed with bolts 18, thereby 3, the main sheave 13 and the auxiliary sheave 20 are attached to the hanging bracket 12.

  As shown in FIG. 7, first, the rope 3 is passed through the gap between the pair of auxiliary sheave mounting plates 19, and the position of the rope 3 is moved from the load supporting hole 36 to the main sheave 13 side. Then, the auxiliary sheave 20 is inserted into the gap of the auxiliary sheave mounting plate 19 from the vertical direction, the rope 3 is hung on the U groove 30, and the auxiliary sheave 20 is locked by the pin 21. Thereby, the rope 3 can be attached to the hoisting machine.

  From the above, with the above configuration, when a load is suspended on the hook block 5 and moved up and down, the load is applied to the rope terminal attachment device 8, but as shown in FIG. 1 or FIG. ) The center axis of the pin 14 is aligned with the center of the vertical direction, and the other rope 3 on the opposite side of the rope end attached to the rope end attaching device 8 is attached to the rope end attaching device 8 by the auxiliary sheave 20. 12, the load is applied to the horizontal (length) direction and the center in the vertical direction of the hanging bracket 12, and the bent portion 37 of the hanging bracket 12 and the shaft 11 are suspended. Since the stress generated on the contact surface is evenly distributed, good structural reliability can be obtained within the swinging range of the hanging bracket 12, and fatigue breakage of the hanging bracket 12 due to repeated use of the hoisting machine can be suppressed. be able to.

  Moreover, since generation | occurrence | production of the bending stress by an out-of-plane load is suppressed in the bending part 37 of the hanging bracket 12, compared with the past, for example, thickening board thickness or other members The cost can be reduced without requiring special reinforcement such as adding. As a result, it is possible to reduce the weight and size, facilitate the forming process, and omit welding.

  Furthermore, as shown in FIG. 1, since the center of the winding start portion of the rope 3 is aligned with the vertical center axis of the pin 14, the force 38 acting on the main sheave 13 and the auxiliary sheave 20 due to the tension of the rope 3 Since the working force 39 is balanced statically with the pin 14 as a fulcrum, the main sheave 13 can support a good load within the swinging range without rotating, and the rope 3 and the auxiliary sheave 20 can be supported in U By suppressing the bending of the rope 3 at the contact surface with the groove 30, it is possible to prevent the rope winding start portion from being worn.

  Further, since the rope 3 is wound more than half turn around the main sheave 13 and the socket 4 is mounted on the socket mounting seat 34, the contact resistance force between the rope 3, the U groove 27 and the vertical U groove 27A is increased. Thus, the socket 4 is supported by the socket mounting seat 34 under the load condition reduced by the contact resistance force. Thereby, sufficient reliability of the socket 4 can be obtained with respect to an instantaneous impact value or overload when the load is lifted, and fatigue damage of the socket 4 can be prevented even with repeated use.

  With respect to the followability of the rope end attachment device 8 to swinging or slanting due to load delay, the hanging bracket 12 is suspended from the shaft 11 so that the shaft 11 can swing in the circumferential direction. It is.

  Moreover, since the main sheave 12 is rotatably suspended with respect to the pin 14 with respect to the swing in the direction perpendicular to the swing of the suspension fitting 12, the pin 14 can swing in the circumferential direction, and Since the wrapping length of the rope 3 around the main sheave 13 does not change due to the swing, a contact resistance force with little fluctuation acts on the rope 3.

  As a result, the vibration absorption by the combination of the two directions described above makes it easy to follow the vibration in all directions, so that an excessive bending load does not act on the rope 3, and the socket 4 is supported under a load condition with little fluctuation. can do.

  In addition, after removing the loosening metal fitting 24, the rope 3 of the portion wound around the U groove 30 of the auxiliary sheave 20 and the U groove 27 and the vertical U groove 27A of the main sheave 13 is connected to the socket 4 side and the winding start side. And pulling out the rope end portion as shown in FIG. 6 easily from the rope slack phenomenon in the U grooves 30, 27 and the vertical U groove 27A. Can do.

  On the other hand, it is possible to easily return the pulled-out rope end portion in the same manner. Therefore, the rope end portion can be easily inspected without removing the sheave.

1: Hoisting machine 2: Winding drum 3: Rope 4: Socket 5: Hook block 6: Outer frame 7: Support plate 8: Rope terminal mounting device 9: Control panel 10: Limit lever 11: Shaft 12: Hanging bracket 13 : Main sheave for rope end installation 13A: End portion 14: Pin 15: Key plate 16: Bolt 17: Key plate 18: Bolt 19: Auxiliary sheave mounting plate 20: Auxiliary sheave 21: Pin 22: Key plate 23: Bolt 24: Slack stopper 25: Bolt 26: Flat part 27: U groove 27A: Vertical U groove 28: Flange 28A: Vertical flange 30: U groove 31: Flange 32: Vertical groove for attaching / detaching socket 33: Ball seat surface 34: Socket mounting seat 35: Load supporting hole 36: Load supporting hole 37: Bending portion, 38: Force acting on main sheave 13 39: Auxiliary shear Forces acting on the blanking 20, 40: load-bearing hole

Claims (5)

With a rope,
A winding drum for winding the rope;
Outer frames provided at both ends of the winding drum;
A pair of support plates facing each other in pairs provided on the outer frame;
A support shaft coupled to the support plate;
A suspension fitting rotatably attached to the support shaft;
A main end sheave for attaching a rope end attached to the hanging bracket,
The rope is wound around a rope end attaching main sheave, and one end of the rope is attached to a rope end attaching portion of the rope end attaching main sheave 13;
The hoisting machine characterized in that the other of the ropes hangs down on a vertical axis located at the horizontal center of the hanging bracket. The hoist according to claim 1,
An auxiliary sheave provided vertically below the main sheave for attaching the rope end,
The hoisting machine is characterized in that the auxiliary sheave is held so that the other end of the rope is suspended on a vertical axis located at the center of the hanging bracket. The hoist according to claim 2,
The hoisting machine, wherein the auxiliary sheave is attached so as to be swingable in an axial direction of the support shaft. The hoist according to claim 2,
The hoisting machine is characterized in that the auxiliary sheave is attached to an attachment plate provided integrally with the rope end attaching main sheave. The hoist according to any one of claims 1 to 4,
The rope end mounting main sheave has a U-shaped main sheave groove for holding the rope,
The rope end mounting main sheave is mounted so that an axial center line of the support shaft and a center line of the main sheave groove are substantially aligned in a vertical direction. .

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