JPS6241032Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a hoisting machine, more specifically, a hoisting machine consisting of a hoisting machine body equipped with a load sheave driven by a motor via a reduction gear device, and a hook equipped with an idler sprocket. Regarding.

Conventionally, there are two types of hoisting machines of this kind: a horizontal type in which a motor, a reduction gear device, and a load sheave are arranged in the horizontal direction in the main body of the hoisting machine, and a vertical type in which the motors, reduction gears, and load sheaves are arranged in the vertical direction.

Although this vertical type winding machine has the advantage of being more compact than the horizontal type, it does not have enough internal space. However, in order to support the chain extending from the load sheave through the sprocket of the hook, it is necessary to separately set up a special space, which causes the problem that the main body of the hoisting machine becomes larger by that amount. .

The present invention was devised in view of the above points, and is designed to support the end of the chain by effectively utilizing the internal space of the vertical hoisting machine body without increasing the size of the main body. This is what I did.

More specifically, each of a pair of side plates has a vertically elongated shape, and a motor is supported above the side plates at the center in the width direction. A load sheave is supported on the side plates offset to one side from the center in the width direction of the side plates. Meanwhile, a bracket is supported by a mounting bolt on the opposite side of the center in the width direction of the side plates from the load sheave support position and between the lower parts of the side plates, and an end of a chain extending from the load side of the load sheave via the sprocket at the hook is engaged with the bracket.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The hoisting machine of the present invention will be explained below with reference to embodiments shown in the drawings.

First, Fig. 1 shows the entire hoisting machine, in which A is the hoisting machine main body, B is a hanging hook, and the main body A
A chain C is made to revolve around the load sheave 5 which is installed inside the main body A, and the free rotation sprocket 17 which is installed inside the hook B, and the end of the chain C is supported by the main body A, so that the chain C is rotated by the rotation of the motor 4 which is installed inside the main body A. The accompanying rotation of the load sheave 5 causes the hook B to be hoisted up and down via the chain C.

The winding machine main body A is constructed as shown in FIGS. 2 to 4, and in each figure, 1 is a casing of the main body 1.
First and second rectangular shaped vertically rectangular
Side plates 2 and 3 are installed in parallel with a predetermined interval.

As shown in detail in FIG. 4, each of the side plates 2 and 3 has its width set based on the external dimension in the radial direction of the motor 4, and is located at a center position in the width direction slightly above the center portion in the longitudinal direction. In addition to providing motor support holes 21 and 31, load sheave support holes 22 and 32 are formed below the support holes 21 and 31 of each plate 2 and 3 at positions laterally offset from their center positions, And around the outer periphery of each support hole 22, 33, a chain presser attachment hole 23,
33 are formed at predetermined intervals. Also, the first
A mounting hole 24 for the reduction gear device is provided in the center of the plate 2, between the support holes 21 and 22 in the plate 2.

The motor 4 is supported between the support holes 21 and 31 of each of the plates 2 and 3 within the casing 1, and the load sheave 5 is supported between the support holes 22 and 23 below the motor 4.
A reduction gear device 6 is provided between them.

Further, the support holes 22 and 3 of the load sheave 5 are
2, and each side plate 2,
Through holes 25 and 34 are formed between the lower portions of the brackets 3 and the bracket 18 is supported between the through holes 25 and 34 by mounting bolts 19, respectively.

The end link of chain C, which extends from the load side of load sheave 5 around sprocket 17 of hook B, is clamped within bracket 18 and connected by set bolt 20, so that sprocket 17 is positioned approximately directly below the center of rotation of motor 4.

The motor 4 includes a stator 41 and a motor shaft 42.
and a rotor 4 integrally provided on the motor shaft 42.
3 and a side rotor 44, and a suction release type brake 7 is provided on the motor shaft 42 on the outside of the side rotor 44. The motor 4 and the brake 7 are covered with a motor cover 45 and a brake cover 71, respectively, and the motor cover 45 is covered with a support hole 31 of the second side plate 3.
The brake cover 71 is inserted through and supported, and its end is fixed around the inner surface of the support hole 21 of the first side plate 2, and the brake cover 71 is fixed to the outer surface of the support hole 21 of the first side plate 2. Then, the motor 4 and the brake 7 are connected to each of the plates 2 and 3.
It is supported between each of the support holes 21 and 31.

The brake 7 is composed of an actuating body 72, a holding body 73 provided on the outer side of the actuating body 72, and a brake shoe 74 provided on the outer peripheral side of the holding body 73. When a predetermined voltage is applied to the motor 41, that is, when the motor 4 is operating, the actuating body 72 is magnetically moved to the side rotor 4.
4 side, thereby causing the brake shoe 74 to move away from the braking surface 71a formed on the inner circumferential surface of the brake cover 71, bringing the motor shaft 42 into a non-braking state, and reducing the applied voltage. When the motor 4 is shut off, that is, when the motor 4 stops operating, the attraction force of the side rotor 44 to the actuating body 72 is released, and the spring 75 interposed between the side rotor 44 and the actuating body 72 removes the actuating body 72. As a result, the brake shoe 74 is brought into pressure contact with the braking surface 71a of the brake cover 71 to maintain the motor shaft 42 in a braking state.

The load sheave 5 has a chain engaging body 53 having a chain engaging groove 52 integrally formed on a side part of the shaft part 51, and a chain engaging body 53 having a chain engaging groove 52 on the other side part of the shaft part 51.
A small diameter gear 54 is fitted. The shaft portion 51 of the load sheave 5 is rotatably supported in the support holes 22, 32 of the first and second plates 2, 3 via bearings 56, 56.

Further, the reduction gear device 6 described above has a tooth groove 62 formed on the inner side of the shaft portion 61 to mesh with the gear 54, and a tooth groove 62 formed on the outer end of the shaft portion 61 on the motor shaft 42 of the motor 4. It is constructed by fitting a large-diameter gear 63 that engages with the tooth groove 46, and this reduction gear device 6 has its shaft portion 61 rotatably supported between the mounting hole 24 of the first side plate 2 and the casing 1. , the rotational power of the motor shaft 42 is transferred to the gear 54 by the large-diameter gear 63 and the tooth groove 62 of the shaft portion 61.
The deceleration is then transmitted to the load sheave 5.

Furthermore, a chain presser 8 is provided between the mounting holes 23 and 24 of each of the side plates 2 and 3 to cover the outer periphery of the chain engaging body 53 in the load sheave 5. A chain holding groove 81 facing the chain engaging groove 52 of the engaging body 53 is provided on the circumferential surface, and a chain free end side and load side passage having a cross-shaped cross section communicating with the internal space of the chain holding member 8 is provided on both sides below the chain holding groove 81. 82 and 83 are formed so that the chain C guided from the respective passages 82 and 83 can go around between the engagement groove 52 of the load sheave 5 and the holding groove 81 of the chain presser 8. A plurality of protrusions 84 are provided on both left and right sides to engage with the mounting holes 23, 33 of each of the side plates 2, 3, and each protrusion 84 is engaged and supported by each of the side plates 2, 3. .

A support hook 9 is attached to the upper part of the casing 1 between each side plate 2 and 3 via a fixing bolt 91 and a nut 92.

Further, an operating shaft 11 is supported between a through hole 85 provided in a lower intermediate portion of the chain presser 8 and a machine wall provided on the outer side of the second side plate 3 within the casing 1, An engaging piece 12 having two engaging portions 121 and 122 protruding in a figure-eight shape is fitted between the chain presser 8 and the second side plate 3 of the operating shaft 11. On the outer side away from the second side plate 3,
A switch cam 13 having an operating portion 131 integrally projected upward is fitted to the engaging piece 12 so as to operate integrally therewith.

Further, above the switch cam 13, a pair of limit switches 14 having movable contact pieces 141 and interlocked with the motor 4 are connected to each of the contact pieces 141, 14.
A pair of actuating plates 15, 15 having elasticity are interposed between the contact pieces 141, 141 of each of these switches 14, 14 in a facing manner, The operation part 131 of the switch cam 13 is arranged in a sandwiched manner, and as the switch cam 13 is operated, the operation plates 15, 1
5, the contact pieces 141, 141 of each limit switch 14, 14 are opened and closed.

A first operator 16 and a second operator that come into contact with the respective engaging portions 121 and 122 of the engaging piece 12 are disposed below the free end side passage 82 and the load side passage 83 of the chain C in the chain presser 8. the first operator 16 and the second operator are respectively provided, and by the engagement of the respective operators 16 and 17 with the respective engaging portions 121 and 122, the actuation shaft 11 in either the left or right direction, the switch cam 13 operates one of the limit switches 15 via the operating plates 15, 15, the motor 4 is stopped, and the winding and winding operations of the chain C are performed. Do it to stop.

The first operator 16 has a lever shape, and one side of the first operator 16 is attached to a lower side of the chain presser 8 with a mounting bolt 1.
It is supported in a cantilevered manner via a chain 61, and a through hole 162 having a planar cross shape is provided on the other side to allow passage of only the chain C in a normal state.

The through hole 162 of the first operator 16 is made longer than the longitudinal length of the element link in the chain C in both the vertical and horizontal directions, and the link is
The hole 1 is deep enough to allow rotation within the element link when the chain C is sent in a twisted state.
62 to normalize it. Only when the chain C cannot be normalized with the first operator 16, the chain C is operated to swing the operator 16 upward, rotate the engagement piece 12, and turn the motor 4 by the limit switch 14. This is done to stop it.

In addition, in the above, one load sheave 5 is installed on the hoist body A, and one sprocket 17 is installed on the hook B.
However, in the present invention, the support holes 22, 32 of the load sheave 5 are provided in an offset manner, so that each side plate 2,
Another sprocket is supported on the side opposite to the support holes 22 and 32 of No. 3, and two sprockets are supported on hook B, and a chain is suspended between each load sheave and each sprocket. It can also be made into a formality.

As explained above, in the present invention, each side plate is made into a vertically elongated shape, the motor is supported above the side plate and at the center position in the width direction, and the load sheave is attached to the side plate. The load sheave is supported by being offset to one side in the width direction with respect to the center position in the width direction, while a bracket is provided between the lower portions of each of the side plates on the opposite side of the load sheave support position with respect to the center position in the width direction of the side plate. It is supported by mounting bolts and is designed to lock the end of the chain extending from the load side of the load sheave through the sprocket in the hook, so that ,
A usable internal space can be effectively formed on the opposite side of the load sheave support position. Within the internal space, a bracket is supported by mounting bolts between the lower portions of the side plates, and the load sheave is attached to the bracket. Since the end of the chain extended from the load side of the sheave through the sprocket in the hook is locked, the width of the hoist body can be shortened and made more compact while using a hook with an idling sprocket. In addition, a special mechanism is provided for locking the end of the chain while having the effect of stably moving the idle sprocket by positioning the idle sprocket almost directly below the rotation center of the motor. There is no need to form any members or spaces other than between the side plates, and the ends of the chain can be securely locked.In other words, all the necessary members and spaces between the side plates, i.e. , support hooks, motors, reduction gears,
The load sheave, the bracket, etc. can be installed effectively, and as a result, the number of parts can be reduced, the number of connecting members can be reduced, and the strength can be improved.

[Brief explanation of the drawing]

Fig. 1 is a drawing showing the entire hoisting machine according to the present invention, Fig. 2 is a longitudinal side view of the main body of the hoisting machine, Fig. 3 is an enlarged sectional view of a part of the inside thereof, and Fig. 4 is a side plate portion. It is a partially cutaway enlarged view of . A...Hoisting machine body, B...Hook, C...Chain, 2, 3...Side plate, 4...Motor,
5...Load sheave, 6...Reduction gear device, 17
...Sprocket.

Claims (1)

[Scope of utility model registration request] A hoisting machine comprising a load sheave driven by a motor via a reduction gear device, a hoisting machine main body having a pair of side plates, and a hook having an idling sprocket, the hoisting machine comprising: Each side plate has a vertically elongated shape, and the motor is supported above the side plate and at the center position in the width direction, and the side plate has:
The load sheave is supported by being offset to one side in the width direction with respect to the widthwise center position of the side plate, and each A hoisting machine characterized in that a bracket is supported by mounting bolts between the lower portions of the side plates, and an end of a chain extending from the load side of the load sheave through the sprocket in the hook is locked to the bracket. .