JPH057121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a groove cutting device for an elevator sheave.

[Conventional technology]

As shown in Japanese Patent Publication No. 53-26375, etc., in a general elevator, a car is connected to one end of a wire rope wrapped around a sheave, and a counterweight is connected to the other end. The car is configured to be raised and lowered by being driven by a motor.

[Problem to be solved by the invention]

The elevator in such a configuration is from 5 years
After 10 years of continuous operation, the sheave grooves will wear out due to the wire rope, and the frictional force will decrease, making it impossible to maintain proper operation. For example, a rope slip may cause a level error.

Generally speaking, as countermeasures when the sheave grooves are worn out, there are two methods: disassemble the hoist and replace with a new sheave, and two methods: take the removed sheave to a specialized factory, have the grooves reworked, and then reassemble it into the hoist. There is. However, both methods require the hoist to be disassembled, which is time-consuming, the former method requires a new sheave, resulting in high costs, and the latter method requires a long time to transport to a specialized factory. It had become necessary.

SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator sheave groove cutting device that can regenerate sheave grooves in a short time without replacing the sheave with a new sheave.

[Means to solve the problem]

In order to achieve this object, the present invention provides an elevator sheave groove cutting device for cutting a groove in a sheave around which a wire rope connected to a car is wound. a lower lathe table which is provided in the lower lathe table and can be fixed to the support leg of the sheave; and a lower lathe table which is arranged above the lower lathe table in parallel to the lower lathe table and further below the rotation axis of the sheave. upper lathe table,
A height adjustment mechanism that moves and fixes the upper lathe table in the vertical direction while keeping it in a horizontal state; The lathe includes a transverse table that moves the sheave in a direction along the rotation axis of the sheave, and a vertical table that moves the tool rest in the direction toward the groove of the sheave.

When cutting a sheave groove, operate the height adjustment mechanism with the lower lathe table fixed to the support leg of the sheave so that the tip of the cutting tool on the lathe's tool post matches the height position of the sheave's rotation axis. Move the upper lathe table vertically, rotate the sheave at the same position, and at the same time move the turret horizontally and vertically as appropriate using the lathe's horizontal feed table and vertical feed table to adjust the tool post's bite. Contact with sieve. As a result, the sheave groove can be regenerated in a short time without replacing the sheave with a new one.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figure 1 is a schematic explanatory diagram of the elevator, with hoistway B
A machine room A provided above is equipped with a hoisting machine 1. This hoisting machine 1 includes a motor 2, a reduction gear 3, and a sheave 4, and the sheave 4 is rotationally driven by the motor 2 via the reduction gear 3. A wire rope 7 is wound around the sheave 4, and a car 5 is connected to one end of the wire rope 7, and a counterweight 6 is connected to the other end. When the sheave 4 is rotated by the motor 2, the car 5 moves up and down the hoistway B via the wire rope 7.

Now, if the groove in which the wire rope 7 of the sheave 4 is wound is worn out after many years of use, remove the wire rope 7 from the sheave 4 and place the lathe 20 in front of the sheave 4 as shown in FIG. The sheave 4 is cut using the lathe 20 to regenerate the groove 4a.

8a shown in FIG. 2 is provided horizontally below the rotation axis of the sheave 4, and is attached to the support leg 35 of the sheave 4.
A lower lathe table 8b fixed to the lower lathe table 8a is arranged above the lower lathe table 8a in parallel to the lower lathe table 8a, and an upper lathe table 9 is provided at a position below the rotation axis of the sheave 4. A jack for raising and lowering the upper lathe table 8b, a bolt 10 whose lower end is fixed to the lower lathe table 8a, and an upper part inserted into a hole formed in the upper lathe table 8b; 11 is screwed into this bolt 10, and the upper lathe table This is a nut that is tightened by sandwiching the nut 8b and the jacket 9. These jacks 9, bolts 10, and nuts 11 constitute a height adjustment mechanism that moves and fixes the upper lathe table 8b in the vertical direction while keeping it in a horizontal state. and,
A lathe 20 is arranged on the upper lathe table 8b.

In this lathe 20, a pair of guides 21a and 21b are fixed on an upper lathe table 8b by bolts 29a and 29b, and a transverse feed table 22 is moved between the guides 21a and 21b in a direction along the rotation axis of the sheave 4. A vertical feed table 23 is provided so as to extend in the direction of the sheave 4, and is movable relative to the horizontal feed table 22, and moves the tool rest 24 in the direction toward the groove 4a of the sheave 4. Vertical feed table 23
The cross feed table 22 is moved through the cross feed spindle 26 by operating the cross feed handle 25.
Move left or right in the direction of . Further, the tool rest 24 is moved back and forth in the direction of the vertical feed table 23 via the vertical feed spindle 28 by operating the vertical feed handle 27. A cutting tool (not shown) is attached to the tool rest 24. This bit and the groove 4a of the sheave 4
In order to fix the positional relationship, for example, the bolt 36 that fixes the support leg 35 of the hoist 1 to the installation surface can be removed once, and the lower lathe table 8a below can be fixed using this bolt 36.

Since the lathe 20 is placed on the upper lathe table 8b that can adjust the relationship between the cutting tool and the groove 4a,
Although it can be carried in and installed near the sheave 4, it cannot be firmly fixed, so when regenerating the groove 4a of the sheave 4 by cutting it with a lathe 20, the rotation speed of the sheave 4 must be considered. There must be. In other words, by rotating the sheave 4 at a speed of 20 rpm or less, vibration of the cutting tool can be prevented. The lower limit of rotation speed is set in consideration of shortening working time.
It is desirable to set the speed to 10 rpm or more.

Next, a method of cutting the groove 4a of the sheave 4 will be explained.
As mentioned above, remove the wire rope 7 from the sheave 4, set up the lathe 20 while adjusting the height of the upper lathe table 8b, and prepare by aligning the cutting tool with the groove 4a using the horizontal feed handle 25 and the vertical feed handle 27. For example, if the groove 4a of the sheave 4 is V-shaped, a cutting tool 3 for cutting the outer periphery is installed on the tool post 24.
0 is attached, and the sheave 4 is rotated via the reduction gear device 3 using the motor 2 of the hoist 1 as a drive source. Next, as shown in FIG.
Cut the outer periphery by the amount of wear. Next, replace the cutting tool with the cutting tool 31, use the horizontal feed handle 25 and the vertical feed handle 27 to adjust the cutting tool 31 so that it is located in the center of the groove 4a, and use the vertical feed handle 27 to adjust the parting tool 31 to the center of the groove 4a. Cut the same amount as the cutting bit 30. Next, set the byte to V
Replace with the groove cutting tool 32, and finish cutting one side of the groove 4a by adjusting the operation of the horizontal feed handle 25 and the vertical feed handle 27. By carrying out these operations for all the grooves, the regeneration of the groove 4a is completed.

On the other hand, if the groove 4a of the sheave 4 is an undercut, the process is performed as shown in FIG. That is, the outer periphery cutting tool 30 is attached to the tool rest 24, and the outer periphery of the sheave 4 is cut by the amount of wear, as in the previous case.
Next, the cutting tool is replaced with a cut-off tool 31, and the center of the undercut portion is cut by the same amount as the amount cut with the outer peripheral cutting tool 30. Next, replace the cutting tool 3 with the undercut finishing tool 3 that matches the width of the undercut, adjust the width of the undercut remaining in the worn groove 4a by adjusting the operation of the horizontal feed handle 25 and the vertical feed handle 27, and then replace the tool 33. It is fed by the vertical feed handle 27 to the bottom of the previously cut groove. The undercut groove width finishing process is performed in two steps: the parting tool 31 and the undercut finishing tool 33, but if there is no problem with cutting, finishing may be done by cutting only the undercut finishing tool 33. Next, replace the cutting tool with a rope groove finishing tool 34 with a shape equal to the radius of the wire rope, and adjust it to the center of the undercut width by controlling the horizontal feeding handle 25 and the vertical feeding handle 27.
Cut to the specified depth. In this way, the groove 4a
Complete the playback.

In the above-described embodiment, the sheave 4 was rotated by the motor 2 of the hoist 1 during regeneration of the groove 4a.
Another driving source may be used.

According to the embodiment of the present invention described above, the lathe 20 is arranged near the sheave 4 in the installed state, and the groove 4a of the sheave 4 is regenerated by the lathe 20, so that the sheave can be replaced with a new one. It is cheaper than conventional methods, and the time required to regenerate the sheave grooves can be significantly reduced compared to taking the sheave to a specialized factory.

In particular, a lathe 20 is placed on an upper lathe table 8b arranged parallel to a lower lathe table 8a fixed horizontally.
In order to align the tip of the cutting tool of the tool rest 24 of this lathe 20 with the rotational axis of the sheave 4, the height adjustment mechanism is used to keep the upper lathe rest 8b in a horizontal state while moving it in the vertical direction. All you have to do is move it to
The tip of the cutting tool can be relatively easily aligned with the rotation axis of the sheave 4, and the cutting tool can be easily positioned. Furthermore, if there is an error in the once set position of the cutting tool, the error can be easily corrected by operating the height adjustment mechanism again.

〔Effect of the invention〕

As described above, the present invention has a structure in which a lathe is provided near the sheave so that its height can be adjusted, and the sheave is rotated by this lathe and the grooves are cut with a cutting tool and regenerated. Therefore, the groove can be regenerated with the sheave installed without preparing a new sheave, so the work can be done in a short time. In addition, the height adjustment mechanism allows easy positioning of the cutting tool, and also makes it easy to correct errors in the once set position of the cutting tool.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of an elevator to which the present invention is applied, Fig. 2 is a perspective view of the vicinity of the sheave showing cutting work by the cutting device of the present invention, and Figs. 3 and 4 show cutting procedures for different grooves. It is a process diagram. 1...Hoisting machine, 2...Motor, 4...Sheave,
4a... Groove, 5... Car, 7... Wire rope, 8a... Lower lathe stand, 8b... Upper lathe stand, 9...
...Jatsuki, 10...Boruto, 11...Natsuto,
20...Lathe, 22...Transverse feed table, 23...
...Vertical feed table, 24...Turret rest.

Claims (1)

[Claims] 1. In an elevator sheave groove cutting device that cuts a groove in a sheave around which a wire rope connected to a car is wound, the device is installed horizontally below the rotation axis of the sheave and can be fixed to the support leg of the sheave. a lower lathe table, an upper lathe table disposed above the lower lathe table in parallel with the lower lathe table and below the rotation axis of the sheave; a height adjustment mechanism for moving and fixing the sheave in the vertical direction while maintaining the same position; a tool rest provided on the upper lathe table and having a cutting tool for cutting the groove of the sheave; and a tool rest that moves the tool rest along the rotation axis of the sheave. What is claimed is: 1. A sheave groove cutting device for an elevator, comprising: a transverse table that moves the turret in the direction toward the groove of the sheave; and a lathe that includes a vertical table that moves the turret in the direction toward the groove of the sheave.