JP2000282135A - Work supporting roller mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work supporting roller mechanism, with which a work having any diameter can stably and suitably be laid. SOLUTION: This mechanism is provided with two pieces of work supporting rollers 100 for laying a columnar work W supported with a center pin (not show in the picture) and to be induction-hardened with an induction heating coil body (not show in the picture) and a displacing mechanism HA for displacing the work supporting rollers 100. This displacing mechanism HA is provided with one pair of roller holders 200 for holding the work supporting roller 100 at the tip part, a roller-holding supporting part 250 for supporting the cross point part of the one pair of roller holders 200 disposed as X-shape so as to be freely rotated, a connector 310 for displacement, having Y-shape connected with the base end part of the one pair of roller holders 200, a guide part 320 for supporting a displacing shaft part 313 in this connector 310 for displacement, and a driving mechanism 330 for elevating/lowering (displacing) the connector 310 for displacement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work supporting roller mechanism for mounting a cylindrical or multi-stage shaft work to be induction hardened.

[0002]

2. Description of the Related Art A conventional work supporting roller mechanism 800 includes:
As shown in FIG.
The work W placed on the center side of the work W is corrected so that the work W having a columnar shape (or a multi-stage shaft) supported by the center pin 910 is long and is bent at the center of the work W. And is provided fixed to the base portion 1000. In FIG. 4A, the work supporting roller mechanism 800
Although only one piece is shown, a plurality of pieces may be provided depending on the length of the work W.

A work support roller mechanism 800 (see Japanese Utility Model Publication No. 6-43170 and Japanese Utility Model Publication No. 5-38037) has work support rollers 810, 810 provided on one side of the center axis of the work. , A work supporting roller 820 provided on the other side, a roller holding body 850 for holding them, and an elevating mechanism (not shown) for elevating them.

A work supporting roller 81 provided on one side
0, 810 and the work supporting roller 8 provided on the other side.
The distance between them is fixed.

The work supporting rollers 810, 810 and the work supporting roller 820 are displaced in the axial direction of the work W, and are provided in the order of 810, 820, 810. Support roller 81
0 and 820 are provided so as to partially overlap (see the above-mentioned publication). However, in FIG. 4B, in order to clarify a problem to be described later, it is not illustrated so as to partially overlap.

The lifting mechanism is provided because the height H of the center pin 910 is constant, and when the diameter of the work W supported at both ends by the center pin 910 is changed to a different one, Work support roller 810,
This is because the heights of 820 and 810 need to be adjusted again.

[0007]

However, in the conventional work supporting roller mechanism 800, the distance between the work supporting rollers 810 and 820 is fixed at a fixed value as described above. Therefore, if the conventional work supporting roller mechanism 800 is configured to be suitable for a large-diameter work W1 as shown in FIG. 5A, the distance between the work supporting rollers 810 and 820 becomes large. Therefore, in this case, as shown in FIG.
When the workpiece 2 is placed on the workpiece supporting rollers 810, 820, 810, the small-diameter workpiece W2 sinks, and it becomes difficult to arrange a high-frequency heating coil (not shown) for quenching.

On the other hand, if the conventional work supporting roller mechanism 800 is replaced with a small-diameter work W as shown in FIG.
2, the work supporting roller 81
The interval between 0,820 becomes smaller. Therefore, in this case, as shown in FIG. 5D, when the large-diameter work W1 is placed on the work support rollers 810, 820, and 810, the central axis of the work support roller 810 and the large-diameter work W
1 and the center axis of the work supporting roller 820 make an angle θ2 between the work supporting roller 81 and the work supporting roller 81 in the case of FIG.
The angle θ1 between the central axis of 0, the central axis of the small-diameter work W2, and the central axis of the work support roller 820 becomes smaller, and the placement of the large-diameter work W1 becomes unstable.

In order to avoid such a problem as much as possible, the work supporting rollers 810, 810 and the work supporting roller 820 are displaced in the axial direction of the work W, as disclosed in the above-mentioned publication. , 810 in order, and when viewed in the axial direction of the work W, the work support rollers 810, 820 are provided to partially overlap, so that the diameter of the work support rollers 810, 820 can be made larger. . However, the small-diameter work W2
The dilemma between the difficulty in arranging the high-frequency heating coil for quenching and the instability of the placement of the large-diameter work W1 is only slightly improved. It is not a fundamental solution.

A main object of the present invention is to provide a work supporting roller mechanism capable of stably and appropriately mounting a work of any diameter.

[0011]

In order to solve the above problems, a work supporting roller mechanism according to the present invention comprises a plurality of work supporting rollers for mounting a columnar or multi-stage shaft work to be induction hardened, A displacement mechanism for displacing the plurality of work support rollers, and when the displacement mechanism displaces the plurality of work support rollers, the heights of central axes of the plurality of work support rollers are all equal and the work And connecting the central axes of the work supporting rollers and the central axis of the work, which are respectively located on one side and the other side with respect to the perpendicular, when viewed from the central axis direction of the work. The distance between the center axis of the work supporting roller located on the one side and the center axis of the work supporting roller located on the other side while maintaining a state in which the angles formed by the respective line segments are equal. Preliminary height of the central axis of said plurality of workpiece support rollers are configured to be changed.

More specifically, the displacement mechanism is, for example, a pair of roller holders that hold the work supporting roller at the distal end, and an intersection of the pair of roller holders that are arranged in an X shape. A roller holder supporting portion rotatably held; a displacement connector connected to a base end of the pair of roller holders; and a drive mechanism for displacing the displacement connector.

Further, the displacement mechanism comprises a pair of roller holders for holding the work supporting roller at the tip end, and a roller holder support for holding the pair of roller holders so as to be displaceable in a C-shape direction. And a drive mechanism for displacing the pair of roller holders in the direction.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a work supporting roller mechanism according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic explanatory view showing a work supporting roller mechanism according to the first embodiment of the present invention.

The work supporting roller mechanism 10 according to the first embodiment of the present invention is supported at both ends by a center pin (not shown) (same as the center pin 910 in FIG. 4), and a high-frequency heating coil body (not shown). A pair of work supporting rollers 100, 100 on each of which a cylindrical work W to be induction hardened is placed;
And a displacement mechanism HA for displacing the position 100.

When the displacement mechanism HA displaces the pair of work supporting rollers 100, 100, the central axes 100j, 100 of the pair of work supporting rollers 100, 100 are moved.
a perpendicular 500 passing through the central axis Wj of the work W, and the work 500 positioned on one side and the other side of the perpendicular 500 when viewed from the direction of the central axis Wj of the work W. Each angle θ1 formed by each line segment 501A, 502A connecting each central axis 100j, 100j of the support rollers 100, 100 and the central axis Wj of the work W.
1, while maintaining the state where θ12 is equal (ie, θ11 = θ12), the pair of workpiece support rollers 100, 10
0 and the center axis 100j of the pair of workpiece support rollers 100, 100j.
The height of 100j is changed.

As a specific configuration for this purpose, the displacement mechanism HA includes a pair of roller holders 200, 200 for holding the work supporting roller 100 at the leading end, and a pair of roller holders arranged in an X-shape. A roller holder supporting portion 250 that rotatably supports the intersection of 200 and 200;
A Y-shaped displacement connector 310 connected to the base ends of the pair of roller holders 200, 200; a guide portion 320 for bearing a displacement shaft 313 of the displacement connector 310 described later; It includes a drive mechanism 330 that moves up and down (displaces) the displacement connector 310, a sensor 340 that detects the amount of displacement of the displacement connector 310, and a controller (not shown) that controls these.

The roller holder support 250 is fixed to a support (not shown) provided from a base (not shown) (similar to the base 1000 in FIG. 4).

The Y-shaped displacement connecting body 310 has upper arms 311 and 311 whose tip ends are rotatably connected to the base ends of the roller holders 200 and 200, respectively, and an upper arm 31.
It has a connecting portion 312 that rotatably connects the base portions 1 and 311 to each other, and a displacement shaft portion 313 whose distal end is connected to the connecting portion 312.

A key groove (not shown) is provided in an upper portion of the displacement shaft 313 and in a region where the guide shaft 320 is engaged with the through hole 320A. A feed screw portion 313A is formed in a lower portion of the displacement shaft portion 313.

The guide section 320 has a through hole 320A. A key (not shown) that engages with the key groove of the displacement shaft 313 is provided so as to protrude through the through hole 320A. The guide section 320 is fixed to a support provided from the base section. Thus, the displacement shaft 3
13 is guided by the guide portion 320 without being erroneously rotated when it is moved up and down.

The driving mechanism 330 includes a nut portion 331 that engages with the feed screw portion 313A of the displacement shaft portion 313, and a timing belt 3 that transmits rotational power to the nut portion 331.
32, a rotating body 333 provided with a timing pulley that engages with the timing belt 332, and a motor 334 that applies a driving force to the rotating body 333.

The nut portion 331 is formed by attaching a timing pulley to an outer peripheral side of a nut engaged with the feed screw portion 313A. The nut part 331 is rotatably held by a support provided from the base part.

The sensor 340 is, for example, a linear sensor such as a linear scale. A linear scale rod as the sensor 340 is attached to the end of the displacement connector 310 to detect the linear displacement of the displacement connector 310.

Note that the control unit is provided with the sensor 340.
Based on the data detected by the work support roller 10
A calculation unit for converting the data to heights of 0 and 100; and a table data unit for previously obtaining and setting the relationship between the diameter of the work W and the height of the predetermined appropriate work supporting rollers 100 and 100 with respect to the diameter. The motor 33 of the driving mechanism 330 is referred to based on the data on the diameter of the workpiece W inputted from the input means (not shown) by referring to the table data section.
4 to operate the appropriate work supporting rollers 100, 10
And an instruction unit for setting the height and the interval to zero.

The above relationship is, for example, that the central axis 100j of the workpiece support roller 100 on one side and the central axis Wj of the workpiece W
Θ10 (= θ11 + θ12 = 2 × θ11) formed by the center axis 100j of the workpiece support roller 100 on the other side.
Is determined in advance under the basic condition that the angle is approximately a predetermined angle (for example, 60 ° to 90 °).

Since the work supporting roller mechanism 10 is configured as described above, when the diameter of the work W is input from the input means, the drive mechanism 330 automatically operates to connect the Y-shaped displacement connection. Body 310 and roller holders 200, 200
Work support rollers 100, 100 are displaced via
The height of the work supporting rollers 100, 100 is set to a predetermined height for correction suitable for the diameter of the work W, and the interval between the work supporting rollers 100, 100 is also suitable for the diameter of the work W. Stable intervals.

That is, when the work W is changed to a larger-diameter work, the interval is widened so as to be about the predetermined angle. On the other hand, when the work W is changed to a smaller-diameter work, The interval is narrowed so as to be approximately the predetermined angle. Needless to say, at this time, the height of the work supporting rollers 100 and 100 is appropriately changed to a height for correcting the work W. Therefore, in the case of the work supporting roller mechanism 10, even if a large-diameter work is placed, the work does not become unstable. There is no hindrance to the arrangement of the heating coil body.

Next, a work supporting roller mechanism according to a second embodiment of the present invention will be described with reference to FIG. FIG.
FIG. 6 is a schematic explanatory view, partially broken away, showing a work supporting roller mechanism according to a second embodiment of the present invention.

The work supporting roller mechanism 11 according to the second embodiment of the present invention is supported at both ends by center pins (not shown) (same as the center pin 910 in FIG. 4), and a high-frequency heating coil body (not shown). A pair of work supporting rollers 100S, 100S on which a cylindrical work W to be induction hardened by
And a displacement mechanism HS for displacing 0S and 100S.

When the displacement mechanism HS displaces the pair of work supporting rollers 100S, 100S, the center shaft 100S of the pair of work supporting rollers 100S, 100S is displaced.
j, 100Sj are equal in height and pass through a central axis Wj of the work W, a perpendicular 500, and a central axis Wj of the work W
When viewed from the direction, the work supporting rollers 100S respectively located on one side and the other side with the perpendicular 500 interposed therebetween,
The angles θ13 and θ14 formed by the line segments 501S and 502S connecting the central axes 100Sj and 100Sj of the workpiece 100S and the central axis Wj of the workpiece W are equal (ie, θ13).
= Θ14) While maintaining the state, the central axes 100Sj, 100S of the pair of workpiece support rollers 100S, 100S are maintained.
j and the pair of work supporting rollers 100
The height of the central axes 100Sj, 100Sj of S, 100S is changed.

As a specific configuration for this purpose, the displacement mechanism HS includes a pair of roller holders 200S, 200S for holding the work supporting roller 100S at the tip end and a pair of roller holders 200S, 200S. A roller holder support section 250S that holds the pair of roller holders 200S, 200S, and a drive mechanism 300S that displaces the pair of roller holders 200S in the direction.

The roller holder 200S has a substantially round rod shape, and rotatably holds the work supporting roller 100S at the distal end and receives the driving force from the displacement mechanism 300S at the proximal end. A screw groove 200S1 is formed.
Further, a key groove (not shown) is formed in the roller holder 200S in a region that is displaced in a through hole 251S1 described later of the roller holder holder 250S. This keyway is
It engages with a key provided to protrude into a through hole 251S1 described later.

The roller holder 250S is provided in the main body 2
51S, and a pair of lower body portions 252S, 252S extending below the main body portion 251S.

At both ends of the main body 251S, through holes 251S1 for holding the roller holders 200S, 200S are provided. One through hole 251S1
And the other through-hole 251S1 (the angle formed by the roller holders 200S, 200S) is a predetermined angle (for example, 60 ° to 90 °). This through hole 251S1
A key (not shown) that engages with a key groove provided in the roller holder 200S is provided so as to protrude inward. With this key and the key groove of the roller holder 200S, the roller holder 200S (and the work supporting roller 100S) is guided without being erroneously rotated.

The lower body 252S includes a displacement mechanism 300S.
A through-hole (not shown) for rotatably holding a rotating shaft 340S described later is provided. Roller holder holding unit 2
50S is fixed to a support (not shown) provided from a base (not shown) (similar to the base 1000 in FIG. 4).

The driving mechanism 300S includes the roller holder 2
00S, a bevel gear 310S that engages with the boss bevel gear 310S, a bevel gear 320S that engages with the boss bevel gear 310S, and a rotating shaft 340S that is provided with the bevel gear 320S at both ends and a worm wheel 330S in the center. When,
Worm 35 engaged with the worm wheel 330S
0S and a motor 360 for driving the worm 350S.
S, a sensor (not shown) attached to the lower end of the roller holder 200S for detecting the amount of displacement of the roller holder 200S, and a controller (not shown) for controlling these sensors
And

The bossed bevel gear 310S is provided with a thread groove 310S1 that engages with the thread groove 200S1 of the roller holder 200S. The sensor is a linear sensor such as a linear scale.

The control section controls the workpiece support rollers 100S, 100S based on the data detected by the sensor.
A calculation unit for converting the height of the workpiece W into data of the height of the workpiece W;
S, the motor 360S is referred to by referring to the table data section based on the table data section in which the relationship with the height of 100S is previously obtained and set and the data on the diameter of the work W input from the input means (not shown). Let it work,
It has an appropriate work supporting roller 100S, and an instruction section for setting the height to 100S.

The work supporting roller mechanism 11 configured as above operates as follows. When the diameter of the work W is input from the input means, the motor 360S is automatically operated, and the other portion of the driving mechanism 300S and the roller holder 20 are operated.
0S, 200S via the workpiece support roller 100S,
100S is displaced, and the work supporting rollers 100S, 10S
The height of 0S is set to a predetermined height for correction suitable for the diameter of the work W. At this time, the pair of roller holders 20
The angle between 0S and 200S is always the predetermined angle. Therefore, the interval between the work supporting rollers 100S, 100S is appropriately adjusted according to the large diameter and the small diameter of the work W to be placed.

Therefore, in the case of the work supporting roller mechanism 11, even if a large-diameter work is placed, the work does not become unstable. On the other hand, even if a small-diameter work is placed, the work sinks and hardens. And does not hinder the arrangement of the high-frequency heating coil body.

Next, a work supporting roller mechanism according to a third embodiment of the present invention will be described with reference to FIG. FIG.
FIG. 9 is a schematic explanatory view showing a work supporting roller mechanism according to a third embodiment of the present invention.

The work supporting roller mechanism 12 according to the third embodiment of the present invention is supported at both ends by center pins (not shown) (same as the center pin 910 in FIG. 4), and a high-frequency heating coil body (not shown). A pair of work supporting rollers 100K, 100K on which a cylindrical work W to be induction hardened by
And a displacement mechanism HK for displacing 0K and 100K.

When the displacement mechanism HK displaces the pair of work supporting rollers 100K, 100K, the center shaft 100K of the pair of work supporting rollers 100K, 100K is displaced.
j, a perpendicular 500 passing through the center axis Wj of the work W having the same height of 100Kj, and a center axis Wj of the work W
When viewed from the direction, the work supporting rollers 100K respectively located on one side and the other side with respect to the perpendicular 500,
The angles θ15, θ16 formed by the line segments 501K, 502K connecting the central axes 100Kj, 100Kj of the 100K and the central axis Wj of the workpiece W are equal (ie, θ15).
= Θ16) While maintaining the state, the central axes 100Kj, 100K of the pair of workpiece support rollers 100K, 100K are maintained.
j and the pair of work supporting rollers 100
The configuration is such that the heights of the central axes 100Kj, 100Kj of K, 100K are changed.

As a specific configuration for this purpose, the displacement mechanism HK includes a pair of roller holders 200K, 200K for holding the work supporting roller 100K at the tip end, and a pair of roller holders 200K, 200K. A roller holder 250K that holds the pair of roller holders 200K, 200K, and a driving mechanism 300K that shifts the pair of roller holders 200K in the direction.

The roller holder 200K is substantially in the shape of a round bar, and rotatably holds the work supporting roller 100K at the distal end, and has a roller 200K1 at the base end. Further, a key groove (not shown) is formed in the roller holder 200K in a region where the roller holder 200K is displaced in a later-described through hole 250K1 of the roller holder holder 250K. The key groove engages with a key (not shown) provided to project into a through hole 250K1 described later.

At both ends of the roller holder 250K, through holes 250K1 for holding the roller holders 200K and 200K are provided. The angle formed by one through hole 250K1 and the other through hole 250K1 (and thus the angle formed by roller holders 200K, 200K) is a predetermined angle (for example, 60 ° to 90 °).
A key (not shown) that engages with a key groove provided in the roller holding body 200K is provided so as to protrude into the through hole 250K1. This key and the key groove of the roller holder 200K make the roller holder 200K
Thus, the work supporting roller 100K is guided without being erroneously rotated. Such a roller holder holding section 250K is fixed to a support (not shown) provided from a base (not shown) (similar to the base 1000 in FIG. 4).

The driving mechanism 300K includes a pair of cams 310.
K, 310K, connecting members 320K, 320K connected to the cams 310K, 310K, connecting members 330K connecting the connecting members 320K, 320K, and a cylinder connected to the base end of the connecting member 330K. Part 34
0K, a support portion 350K for supporting the base end of the cylinder portion 340K, and a rod portion 340K for the cylinder portion 340K.
And a control unit (not shown) for controlling the loading and unloading of the device 1.

The cam 310K and the connecting body 320K are fixed via a pin 315K. The cam 310K is, for example, an eccentric cam. Accordingly, the shape of the cam 310K is circular, and the pin 315K is fixed at a position shifted from the center of the circle. The pin 315K is rotatably held by a support provided from the base.

The roller 200K1 of the roller holder 200K is in contact with the thickness of the cam 310K. The contact position of the roller 200K1 with the cam 310K on one side and the contact position of the roller 200K1 with the cam 310K on the other side are at the same shape of the cam 310K.
As a result, the height of the roller holders 200K, 200K mounted on the cams 310K, 310K (and the height of the work supporting rollers 100K, 100K) is adjusted according to the insertion and removal of the rod 340K1 of the cylinder 340K. The displacement is the same.

The connecting body 320K and the connecting body 330K are rotatably connected via a pin 325K.
The base end of the coupling body 330K is connected to the cylinder 340K.
Is rotatably connected to the tip of the rod portion 340K1.

The support section 350K holds the base end of the cylinder section 340K via a pin 345K so as to be vertically movable. The support 350K is fixed to a support provided from the base.

The control section controls whether the rod section 340K1 of the cylinder section 340K is in the extended state or in the retracted state. That is, the work support roller mechanism 12 includes a work W having a diameter suitable for the height of the work support rollers 100K and 100K when the work W has protruded from the rod 340K1 of the cylinder 340K, and a rod having the rod W of the cylinder 340K. It corresponds to two types of diameters, namely, a diameter suitable for the height of the work supporting rollers 100K and 100K when 340K1 is inserted. The control section operates the cylinder section 340K based on data relating to the diameter of the work W input from input means (not shown).

The work supporting roller mechanism 12 configured as above operates as follows. If the diameter of the work W is input from the input means, the cylinder unit 340K is automatically set.
Of the roller holder 200K with respect to the cam 310K of the driving mechanism 300K by operating the rod portion 340K1 of the roller 20K.
The contact position of 0K1 is changed, and the roller holder 200K,
Work support rollers 100K, 100K via 200K
Is displaced, and the height of the work supporting rollers 100K, 100K is set to a predetermined height for correction suitable for the diameter of the work W. At this time, a pair of roller holders 200K,
The angle made by 00K is always the predetermined angle. Therefore, the interval between the work supporting rollers 100K, 100K is appropriately adjusted according to the large diameter and the small diameter of the work W to be placed.

Therefore, in the case of the work supporting roller mechanism 12, even if a large-diameter work is placed, the work does not become unstable. And does not hinder the arrangement of the high-frequency heating coil body.

In the work supporting roller mechanism 12 according to the third embodiment of the present invention, the driving mechanism 300K
Only one cylinder unit 340K is provided as a driving device of the above, so that it is possible to cope with works of two diameters. When increasing the types of workpiece diameters that can be
One or more other cylinder units may be connected in series between the 40K and the support 350K. Also, the cylinder part 340K
Instead, a feed screw, a nut, a motor and the like (see the case of the work supporting roller mechanism 10) may be used.

In the work support roller mechanisms 10, 11 and 12 according to the first to third embodiments of the present invention, the work support roller is configured to be automatically displaced. Good.

In the work supporting roller mechanisms 10, 11, and 12 according to the first to third embodiments of the present invention, the number of the work supporting rollers is two.
More than one. ). In that case, similarly to the related art, the work support roller located on one side and the work support roller located on the other side across the perpendicular passing through the center axis of the work are staggered in the axial direction of the work W and provided alternately. When viewed in the axial direction of the work W, the work support roller located on one side and the work support roller located on the other side may be provided so as to partially overlap.

When the work has a multi-stage shaft, the same operation as in the case where the work has a columnar shape as described above may be performed, and a description thereof will be omitted.

[0060]

As described above, the work supporting roller mechanism according to the present invention comprises a plurality of work supporting rollers on which a columnar or multi-stage work to be induction hardened is mounted, and the plurality of work supporting rollers. When the displacement mechanism displaces the plurality of work support rollers, the height of the central axes of the plurality of work support rollers are all equal and a perpendicular line passing through the central axis of the work is provided. And each line segment connecting the center axis of the work support roller and the center axis of the work, which are respectively located on one side and the other side of the perpendicular line when viewed from the center axis direction of the work. The angle between the center axis of the work supporting roller located on the one side and the center axis of the work supporting roller located on the other side and the plurality of The height of the central axis of the support rollers are configured to be changed.

Therefore, in the case of the work supporting roller mechanism according to the present invention, the distance between the work supporting roller located on the one side and the work supporting roller located on the other side and the work supporting roller on both sides are provided. Since the height of the workpiece is changed by the displacement mechanism, even if the workpiece is changed to one with a different diameter, this displacement mechanism
The work supporting roller can be adjusted to a corresponding interval and height. Therefore, even if a large-diameter work is placed on the work supporting roller mechanism according to the present invention, the work does not become unstable. There is no hindrance to the arrangement of the coil body. Therefore, it is possible to provide a work supporting roller mechanism capable of stably and appropriately mounting a work of any diameter.

More specifically, the displacement mechanism of the work supporting roller mechanism according to the present invention includes, for example, a pair of roller holders for holding the work supporting roller at the tip end thereof and the pair of X-shaped roller holders. A roller holder supporting portion that rotatably holds the intersection of the roller holders, a connecting member for displacement connected to the base end of the pair of roller holders, and displacing the connecting member for displacement. And a driving mechanism for driving the motor.

Therefore, in the case of the work supporting roller mechanism according to the present invention, the work supporting roller is held by the pair of roller holders arranged in an X shape, and is displaced around the intersection. So that the distance between the work support roller located on the one side and the work support roller located on the other side and the height of the work support rollers on both sides are determined by the distance and height according to the diameter of the work. Can be adjusted. Therefore, even if a large-diameter work is placed on the work supporting roller mechanism according to the present invention, the work does not become unstable. There is no hindrance to the arrangement of the coil body. Therefore, it is possible to provide a work supporting roller mechanism capable of stably and appropriately mounting a work of any diameter.

Further, the displacement mechanism of the work supporting roller mechanism according to the present invention includes a pair of roller holders for holding the work supporting roller at the tip end, and a pair of roller holders arranged in a C-shape. It may be provided with a roller holder supporting portion that movably holds, and a drive mechanism that displaces the pair of roller holders in the direction.

Therefore, in the case of the work supporting roller mechanism according to the present invention, the pair of roller holders that hold the work supporting rollers are displaced in the C-shaped direction. That is, since the gap between the work support roller located on the one side and the work support roller located on the other side and the height of the work support rollers on both sides are configured to be changed by a displacement mechanism, Even if the work is changed to one having a different diameter, the work supporting roller can be adjusted to an interval and a height corresponding to the diameter of the work. for that reason,
Even if a large-diameter work is placed on the work supporting roller mechanism according to the present invention, it does not become unstable. It doesn't interfere with body positioning. Therefore, it is possible to provide a work supporting roller mechanism capable of stably and appropriately mounting a work of any diameter.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a work supporting roller mechanism according to a first embodiment of the present invention.

FIG. 2 is a partially broken schematic explanatory view showing a work supporting roller mechanism according to a second embodiment of the present invention.

FIG. 3 is a schematic explanatory view showing a work supporting roller mechanism according to a third embodiment of the present invention.

FIG. 4 is a view for explaining a conventional work supporting roller mechanism, and FIG. 4A shows a work whose both ends are supported by a center pin of a center unit, and a work supporting roller mechanism for mounting the work; (B) is a schematic cross-sectional view of the work supporting roller mechanism.

FIG. 5 is a schematic cross-sectional explanatory view showing a state of a work placed on a work supporting roller of a conventional work supporting roller mechanism, and FIG. A state in which a large-diameter work is placed on a work supporting roller mechanism configured by enlarging the figure. FIG. 2B shows a state in which a small-diameter work is placed on the work supporting roller mechanism in FIG. (C) shows a state in which a small-diameter work is placed on a work support roller mechanism configured to reduce the distance between a pair of work support rollers, and (D) of FIG. FIG. 4 is a diagram illustrating a state where a large-diameter work is placed on a work support roller mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Work support roller mechanism 100 Work support roller 200 Roller holder 250 Roller holder support part 310 Displacement connector 330 Drive mechanism HA Displacement mechanism W Work

Claims (3)

[Claims] 1. A method according to claim 1, further comprising: a plurality of workpiece support rollers for mounting a columnar or multi-stage workpiece to be induction hardened; and a displacement mechanism for displacing the plurality of workpiece support rollers. When displacing the plurality of work support rollers, the height of the central axes of the plurality of work support rollers are all equal, and a perpendicular passing through the center axis of the work,
When viewed from the center axis direction of the work, each angle formed by each center axis of the work support roller located on one side and the other side with respect to the perpendicular line and each line segment connecting the center axis of the work, While maintaining the same state, the distance between the center axis of the work support roller located on the one side and the center axis of the work support roller located on the other side and the height of the center axis of the plurality of work support rollers A work supporting roller mechanism characterized in that the length of the work supporting roller is changed. 2. The apparatus according to claim 1, wherein the displacement mechanism is configured to rotatably move an intersection of the pair of roller holders that hold the work supporting roller at a leading end and the pair of roller holders that are arranged in an X shape. A roller holder supporting portion, a displacement connector connected to a base end of the pair of roller holders, and a drive mechanism for displacing the displacement connector. The work supporting roller mechanism according to claim 1. 3. The roller mechanism according to claim 1, wherein the displacement mechanism includes a pair of roller holders that hold the workpiece support roller at a tip end thereof, and a roller holder support that holds the pair of roller holders so as to be displaceable in a C-shape direction. 2. The work supporting roller mechanism according to claim 1, further comprising a driving mechanism for displacing the pair of roller holders in the direction.