JPH05161995A - Positioner - Google Patents

Abstract

PURPOSE:To obtain the positioner which can smootbly erecute set-up operation by attaching and detaching the work without opening ad closing a part of rotary frame supporting the work on the positioner used for supporting the work rotationable around the axial line of longitudinal direction at the time for executing the long size work with welding and the other treatment. CONSTITUTION:At a positioner providing a notch 17 to be made to the path of work at the time for attaching and detaching the work to a rotary frame 13 on peripheral teeth 19 for rotatively driving provided on the rotary frame 12 supporting the work, two intermediate gears 28 are interposed between the peripheral teeth 19 and the driving gear 27 set at the supporting frame 11 separately by the distance between shafts L larger than the opening width S of the chamfer 17 of the rotary frame, and these two gears 28 are respectively engaged to both of the driving gear 27 and the peripheral teeth 19 of the rotary frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioner used for supporting a work when welding or performing other processing on a long work, and relates to a device for supporting the work so as to be rotatable about an axis in the longitudinal direction. It is a thing.

[0002]

2. Description of the Related Art In order to perform welding work of a long work efficiently, a positioner for supporting the work around a longitudinal axis Q (FIG. 3) is required. For example, the provisionally welded through columns 20 for a steel frame structure are main-welded by using a positioner having a rotary frame 12 as shown in FIG. Two rotating frames 12 are provided to support the work 20 at two places, and each rotating frame 12 includes a plurality of support rollers 15 arranged on the circumference as shown in FIGS. It is rotatably supported around the line P, and is driven to rotate by driving the outer peripheral teeth 19 provided on the outer periphery thereof with the drive gear 27.

The rotary frame 12 needs a notch for inserting the work 20 in the outer peripheral portion. However, if the rotary frame 12 is provided with a notch, the rotary frame 12 cannot be driven when the rotary frame 12 is inverted. Therefore, conventionally, the rotary frame 12 is divided into a U-shaped main body 36 and a semi-cylindrical lid 35, and outer peripheral teeth 19 continuous with them are provided, and the notch of the main body 36 is directed upward when the work is attached or detached. Then, the lid 35 is opened, the work 20 is attached to the main body 36, and then the lid 35 is closed to make the rotary frame 12 ring-shaped and rotationally driven.
The lid 35 is opened and closed as shown in FIGS.
A structure for completely removing the lid or a structure in which the lid 35 is attached by a hinge structure as shown in FIG.

The work 20 is fixed to the rotary frame 12 by
A clamp tool 21 (shown separately in FIGS. 3 and 4) is attached to the rotary frame 12, and the work piece 20 is moved by the clamp tool 21 between a rotation center line P of the rotary frame and a longitudinal axis line Q of the work. It is performed by gripping in a matched state.

[0005]

However, in the positioner described above, the lid must be attached and detached each time the work 20 is attached to and detached from the rotary frame 12, which causes a troublesome setup work. there were.

An object of the present invention is to solve the above problems, and an object of the present invention is to provide a positioner capable of smoothly performing a setup operation when loading and unloading a work.

[0007]

The positioner of the present invention comprises a rotary frame 12 rotatably supported around a horizontal center line P by a plurality of support rollers 15 axially supported by a support frame 11. . The rotary frame 12 has a notch 17 that extends in the radial direction.
The depth D is sufficient to insert the work 20 in the center of the. The rotary frame 12 faces the notch 17 and the work 2
It has a clamp tool 21 for gripping 0 from both sides, and the work 20 is gripped by the clamp tool 21 to rotate the rotary frame 12
Held in the center of. The rotating frame 12 is provided with outer peripheral teeth 19 for driving the rotating frame 12. Between the outer peripheral teeth 19 and the drive gear 27 provided on the support frame 11, there is an axial gap larger than the opening width S of the notch 17 of the rotating frame. Two intermediate gears 28 are provided at a distance L. The two intermediate gears 28 are pivotally mounted at positions where they mesh with both the drive gear 27 and the outer peripheral teeth 19 of the rotary frame.

[0008]

In the positioner of the present invention, the two intermediate gears 28 are provided between the outer peripheral teeth 19 provided on the rotary frame 12 and the drive gear 27.
Is provided, and the two intermediate gears 28 are provided with the notch 1 of the outer peripheral teeth 19.
The rotating frame 12 is separated by an axial distance L larger than the opening width S of 7
Since the outer peripheral tooth 19 of the rotary frame 12 is engaged with the outer peripheral tooth 19 of the rotary frame 12, one of the intermediate gears 28 is always meshed with the outer peripheral tooth 19 of the rotary frame 12 even when the notch 17 is rotated toward the drive gear. Even without doing so, the driving force can be constantly applied to the rotary frame 12.

[0009]

1 and 2 show an embodiment of a positioner according to the present invention.

In the figure, a carriage 2 is movably mounted on a base frame 1 made of I-shaped steel. The carriage 2 is slidable on rails 4 provided on the upper surface of the base frame 1 by sliding blocks 3 arranged at the four corners of the lower surface thereof, and a pinion fixed to a drive shaft of a motor 5 mounted in the center thereof. It is possible to move and position on the base frame 1 by engaging the rack 6 arranged in parallel with the rail 4 and driving the motor 5.

A support frame 11 is erected on the carriage 2, and a rotary frame 12 is rotatably supported by the support frame 11.
The support frame 11 is arranged so as to be separated in the width direction of the carriage 2.
It is provided with one support column 13 and U-shaped support plates 14B and 14F installed on the top of the support column. The support plates 14 are provided in parallel at regular intervals, and one support plate 14B has the other support plate. A plurality of support rollers 15 are arranged in a ring shape on the support plate 14F side. Support plates 14B, 14F on both sides
The pair of contact rollers 16B and 16F rotatable about the radial axis are provided on the facing surfaces of the contact rollers 16B and 16F, respectively. The rotary frame 12 for supporting the work is provided with these rollers 15, 1
It is supported by 6B and 16F, and a notch 17 that opens in the radial direction is provided at one peripheral surface thereof, and outer peripheral teeth 19 are provided on the entire circumference of the rotary frame 12 except the opening 18 of the notch.

A U-shaped clamp tool 21 for holding the work 20 in the width direction is mounted on the rotary frame 12. A support ring 22 whose center coincides with the center of the rotary frame 12 is fixed to the rotary frame 12, and an outer peripheral surface of the support ring 22 is supported by the support roller 15 and is a plate-shaped rotary frame 12. Both surfaces are supported by being sandwiched by the contact rollers 16F and 16B, and the rotating frame 12 is rotatable about its center line P and is not tiltable.

A drive device 25 for driving the rotary frame 12 is provided below the support frame 11, and the drive device 25 is provided.
Has a drive gear 27 axially mounted between two mounting plates 26 mounted in parallel to the support column 13 and two intermediate gears 28 axially mounted at a position above the drive gear. There is. The intermediate gears 28 are in mesh with the drive gears 27, respectively.
The individual intermediate gears are mounted in the horizontal direction at a distance L between shafts that is wider than the opening width S of the cutout of the rotary frame. The drive gear 27 meshes with the pinion 30 fixed to the output shaft of the motor 29 below the drive gear 27.

The work 20 is manufactured by using the positioner of the present invention.
When carrying out the main welding work, etc., the motor 5 is driven to move and position the carriage 2 to a desired position, and the notch 1 of the rotary frame is
The column 31 of the work is inserted into the work 7, and the column 31 is grasped from both sides by the vise piece 32 of the clamp tool 21.
The rotating frame 12 is rotated to position the work 20 in the circumferential direction.

Even if the notch 17 moves downward and the one intermediate gear 28 and the outer peripheral tooth 19 are disengaged from each other, the inter-axis distance L of the two intermediate gears 28 is larger than the opening width S of the notch. The meshing state of the intermediate gear 28 of FIG.
The rotation of the motor 29 is transmitted to the rotary frame 12 via the drive gear 27 and at least one intermediate gear 28, so that the rotary frame 12 can always be provided with a rotational force. Further, since the two intermediate gears 28 mesh with the drive gear 27 and rotate synchronously even when they are disengaged from the outer peripheral teeth 19, even when the disengaged intermediate gear 28 and the outer peripheral teeth 19 mesh again. There is no phase shift.

[0016]

As described above, the positioner of the present invention is
Since two intermediate gears are provided with an axial distance larger than the opening width of the notch for storing the work, the rotating frame can always apply a rotating force without the lid, so that the work is attached and detached. In this case, the opening / closing work of the lid is unnecessary, the structure of the rotary frame can be simplified, and the work setup work can be simplified.

[Brief description of drawings]

FIG. 1 is a front view of a positioner of the present invention.

FIG. 2 is a sectional view of part A in FIG.

FIG. 3 is a perspective view showing a main part of a conventional positioner and a through column as a work.

FIG. 4 is a perspective view showing another example of the connecting structure of the main body and the lid.

FIG. 5 is a perspective view showing still another example of the connecting structure of the main body and the lid.

[Explanation of symbols]

 11 Support frame 12 Rotating frame 15 Support roller 17 Notch 19 Peripheral tooth 20 Workpiece 21 Clamping tool 27 Drive gear 28 Intermediate gear P Disc center line Q Workpiece axis D Notch depth S Notch opening width L Inter-axis distance

Claims (1)

[Claims] 1. A rotary frame (12) rotatably supported around a horizontal center line (P) by a plurality of support rollers (15) axially supported by a support frame (11), The frame is provided with a radial notch (17) for loading and unloading the work (20), and in the positioner in which the rotary frame (12) is rotationally driven by a gear meshing with its outer peripheral teeth (19), The rotation of the drive gear (27) is arranged with an axial distance (L) larger than the opening width (S) of the notch (17) and meshes with the drive gear (27) and the outer peripheral teeth (19), respectively 2
A positioner characterized in that it is transmitted to the rotary frame (12) via an intermediate gear (28).