JPS637260A - Grinding device for winding drum of overhead crane - Google Patents

Abstract

PURPOSE:To correct a winding drum in a short time and automatically with remote control by utilizing fluid pressure upon pressure-contact of a grindstone of a grinding device to the inside of a spiral groove of a winding drum. CONSTITUTION:In a state that a winding drum 4 is moved closely t a grindstone 7 and a wire rope is delivered out, the all grindstone 7 is bought into abut against the winding drum 4. Then, the protruded streaks 7a of the grindstone cuts into a spiral groove 4a of the winding drum 4 with the spring force of a pulling coil. At this time, when the winding drum 4 is rotated, and air cylinder 14 advances to a position where it balances under a specified force, then grinding is started, and remote control can be available by putting on/off a power source from a position on a floor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a grinding device for a hoisting drum of an overhead crane.

[Prior art and its problems]

As shown in a schematic side view in FIG. 7, the club 3 of the overhead crane 2 installed at a high location in the building 1 has a grooved hoisting drum 4, a part of which is shown in an enlarged plan view in FIG. Built-in.

The hoisting drum 4 is susceptible to wear due to the frictional contact of the wire rope 5 under a large load, and if the groove shape is deformed due to wear, there is a risk that the wire rope 5 will be severed, such as being severed.

For this reason, conventionally, the winding drum 4 has been ground periodically or as needed for the purpose of correcting the groove shape. workers climb up and use grinding machines, etc.
It required a lot of time and effort. Naturally, during this period, the overhead crane 2 could not be used, so the factory's operating rate could not be avoided.

Therefore, there has been a desire for a means to perform corrective grinding in a short time on the hoisting drum of an overhead crane located at a high location, but no effective means has yet been proposed.

[Purpose of the invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a grinding device for a hoisting drum of an overhead crane, which allows the hoisting drum to be repaired automatically in a short time and by remote control.

[Summary of the invention]

This invention provides a grindstone for grinding the inside of a spiral groove of a hoisting drum, a head for supporting the grindstone, a guide roll supported on the head to the side of the grindstone, and a grindstone for separating the head from the hoisting drum. an arm movably supported in a tangential direction, a table supporting the arm, and a drive means for moving the table parallel to the axis of the hoisting drum;
The present invention is characterized in that a fluid pressure means is provided between the head and the table, and fluid pressure is used when the grinding wheel is brought into pressure contact with the spiral groove of the hoisting drum.

[Structure of the Invention] Next, the apparatus of the present invention will be explained with reference to the drawings.

1 to 4 show a first embodiment of the device of the present invention, FIG. 1 is a side view, FIG. 2 is a plan view with the - part removed, and FIG. 3 is a FIG. 4, which is a plan view showing one of the guide rolls, is an explanatory view showing the arrangement of a full-form grindstone as an example of a grindstone and a guide roll.

In FIGS. 1 and 2, the full-form grindstone 7. ' is a plurality of protrusions 7a' corresponding to the spiral grooves 4a of the winding drum 4.
zi and is attached to the head 8.

The head 8 has horizontal brackets 8A, 8A on its back surface, and vertical brackets 8B, 8B are provided directly above the brackets 8A, 8A.

Head 8 is connected to table 10 via arm 9.

The arm 9 consists of two levers 9A and 9B, and one end of the lever 9A is a bracket 8A of the head 8.

8A by a pin 11, and the other end is connected to the tip of the laser beam 9B by a pin 12. The base end of the lever 9B is the bracket IOA on the front side of the table 10.

10A with a pin 13.

A bracket 10B is attached to the top of the table 10, and the base end of a balanced air cylinder 14, which is an example of fluid pressure means, is attached to a horizontal pin 1.
They are connected by 5.

The tip of the rod 14A of the air cylinder 14 is connected to the bracket 8B of the head 8 by a horizontal pin 16.

A tension coil spring 17 is attached to the arm 9, extending between the end of the lever 9A and the head 8 near the joint between the levers 9A and 9B.
A tension coil spring 18 extends between the tip of the lever 9B and the table 10 near the connecting portion thereof.

The table 10 has a winding drum 4 with respect to the frame 19.
It is mounted so as to be movable in the horizontal direction via a goal screw 20 and cylindrical rollers 21, 214 parallel to the line 111 of FIG.

Furthermore, idle rolls 22, shown in FIG. 3, are arranged on the head 8 on both left and right sides of the full-form grindstone 7, as shown in FIG. 4.

In the apparatus of the first embodiment configured in this way, the winding drum 4 is brought close to the winding drum 4, and the wire rope is brought into contact with the full-form grindstone 7'f and the winding drum 4 in a state where the entire wire rope is let out.

The full-form grindstone 7 that is in contact with the hoisting drum 4 is pressed against the hoisting drum 4 by the spring force of the tension coil springs 17 and 18, with the protrusions 7a biting into the spiral grooves 4a of the hoisting drum 4. At this time, when the hoisting drum 4 is rotated, the air ring 14 advances to a position where it is balanced at a predetermined pressure, and grinding is performed to a predetermined depth of penetration.It is also possible to remotely control the power supply from the floor by turning it on and off. Become.

The fifth factor is that the device of the second embodiment, in which the head portion is shown in a side view, differs from the first embodiment in that the grindstone 7' is attached to the head 8 and is fully rotated.

The rotary grindstone 7' is formed to press into the spiral groove 4a of the winding drum 4 and apply low pressure to the spiral groove into a normal shape, and is attached to the rotating shaft 23A of the electric grinder 23. .

There are lugs 2 on both left and right sides of the electric grinder 23.
3B and 23C are provided.

An adjustment screw 24 whose base end is fixed to the head 8 is inserted through the lugs 23B and 23C.

Adjustment nuts 25A and 25B abut against the lugs 23C, and by adjusting the positions of these adjustment nuts, the longitudinal position of the electric grinder 23 is adjusted to adjust the cutting depth of the rotary grindstone 7'.゛Figure 6 shows a rotating grindstone 7' and guide rolls 22 provided on both its left and right sides.
．． 22 sequences are shown.

〔Effect of the invention〕

As explained above, according to this invention, the winding drum can be hoisted from a high place one by one. Spiral grooves can be ground without suspension, and in particular, since the position of the grinding wheel is determined by fluid pressure means, precise grinding corrections are possible, and even when the factory is in operation, the entire overhead crane can be used. This has the extremely useful effect of allowing work to be completed in a short amount of time when it is not in use.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of this invention,
FIG. 1 is a side view, FIG. 2 is a plan view with the - part removed, and FIG. 3 is a plan view showing one of the guide rolls.
FIG. 4 is an explanatory diagram showing the arrangement of the full-form grindstone and the guide roll, and FIGS. 5 and 6 show a part of the second embodiment, and FIG. FIG. 6 is a plan view of the rotating grindstone, and is a plan view showing the arrangement of idle rolls in the rotating grindstone. FIG. 7 is a side view showing an example of an overhead crane, and FIG. 8 is an enlarged plan view showing a portion of a grooved hoisting drum. In the drawings, 4... Hoisting drum, 4a... Spiral groove, 5... Wire rope, 7
...General grindstone, 7'...Rotary grindstone, 7 a
, 7'a...Convex stripe, 8...Head,
9...Arm, 14...Air cylinder, 17.18
...Tension coil spring, 22...Guide roll, 23
...Electric grinder. Figure 2 One Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A grindstone for grinding the inside of the spiral groove of the hoisting drum, a head for supporting the grindstone, a guide roll supported on the head to the side of the grindstone, and the head can be moved toward and away from the hoisting drum. a table for supporting the arm; a drive means for moving the table parallel to the axis of the hoisting drum; and a fluid pressure means provided across the head and the table. Features: Grinding equipment for overhead crane hoisting drums.