JPH0228422Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a core replacement device for a leak test device installed in the middle of a production line for vehicle wheel rims.

[Prior Art] A wheel rim is manufactured by rolling a flat plate material, butt-welding the abutted portions, and passing the flat material between forming rollers to form a rim shape, and is manufactured on a continuous production line.

Before the wheel rim is mated and welded to the disc, it is passed through a helium leak tester to ensure there are no defects or cracks in the weld. A helium leak test device consists of a device that seals a wheel rim sent by a tact conveyor, creates a vacuum inside the wheel rim, and then blows helium gas from the outside to detect a leak. Therefore, helium leak test equipment
a pair of plates that approach the wheel rim from both sides in the axial direction of the wheel rim that is fed with the axis of the rim annular body horizontally, and seal the openings at both ends in the axial direction;
a cylinder device that moves the plate forward and backward in the wheel rim axis direction with respect to the wheel rim; and a core attached to either one of the pair of plates for reducing the volume to be evacuated in the wheel rim. have. The above pair of plates are
It also includes a cylinder device for driving them, and conventionally, they were provided at positions facing each other in the direction of the axis of the wheel rim, and their relative positions remained unchanged.

On the other hand, wheel rims of different car models are sent to the wheel rim manufacturing line, and the diameter and width of the wheel rims change depending on the type of wheel rim. Cores of different sizes were installed and replaced for each different type of core.

[Problems to be solved by the invention] However, since there is another plate in front of the plate to which the core is attached, and each cylinder device is located behind the plate, it is difficult to replace the core. had to be done diagonally, making replacement an extremely difficult and time-consuming task.

An object of the present invention is to facilitate the replacement of cores in a leak test device installed on a wheel rim manufacturing line, which is performed every time the type of wheel rim changes.

[Means for solving the problem] The core replacement device of the leak test device of the present invention that meets this purpose is installed in the middle of the wheel rim manufacturing line, and is pressed against the openings at both ends of the wheel rim by a cylinder device. A leak test for a wheel rim that has a pair of plates that seal the inside of the wheel rim, and a core that is attached to one of the pairs of plates to reduce the volume of the space that should be evacuated inside the wheel rim. An apparatus comprising the core, the plate to which the core is attached, and a cylinder device for pressing the plate against the wheel rim, configured to be able to shift the relative position of the core and the plate to which the core is attached, and a drive device for the same. Become.

[Function] In the above leak test device, when performing a leak test, the plate is pressed against the wheel rim by each cylinder device on the same axis as the axis of the wheel rim, sealing the wheel rim, and then Is helium gas being blown onto the outside of the wheel rim, where the volume of the space to be evacuated is reduced by the core, and is helium gas leaking from welds, etc. to the inside of the rim that has been evacuated? The integrity of the wheel rim butt weld is tested by checking.

When the type of wheel rim changes, the core must be replaced with a core of a different size, but before replacing the core, first replace the plate and cylinder device with the core attached to the opposing plate and cylinder. Shift the relative position to the device and open the front of the core. The tang can therefore be approached from the front by a person, making it easy to remove the tang from the plate and install another stop. After replacing the core, the core, plate, and cylinder device are returned to their original positions by the drive device to complete the core replacement work.

[Embodiments] Hereinafter, preferred embodiments of the core replacement device for a leak test device according to the present invention will be described with reference to the drawings.

1 to 3 show an embodiment of the present invention. In the figure, wheel rim 1 is made by rolling a flat plate material and butt-welding the ends to form a rim shape.
is intermittently sent to a tact conveyor 2 and sent to a leak test device 3 that uses helium gas. The wheel rim 1 is placed on an attachment 4 of a tact conveyor 2, and as the attachment 4 is rotated by an endless chain 5, the wheel rim 1 is conveyed. Rotation of the endless chain 5 is achieved by transmitting the rotation of a drive motor 6 to the chain 5 via a sprocket 7.

The leak test device 3 includes a pair of plates 8 and 9 arranged on both sides of the wheel rim 1 conveyance line.
The pair of plates 8 and 9 each extend perpendicularly to the conveying direction of the wheel rim 1, and the cylinder device 1
0 and 11, it is driven to move forward and backward toward the wheel rim 1. The plates 8 and 9 are in close contact with the wheel rim 1 and seal the openings at both ends of the wheel rim 1 in the axial direction. Rubber 12 is stretched over the contact surface with the wheel rim 1 to ensure a complete seal.

A core 13 is attached to one of the pair of plates 8 and 9 to reduce the volume of space that needs to be evacuated inside the wheel rim 1 when it is sealed by the plates 8 and 9. . When wheels of different vehicle types are sent to a wheel manufacturing line, the width H and diameter D of the wheel rim 1 change, so the core 13 must be replaced accordingly.

Also, plates 8 and 9 of the leak test device 3
moves reciprocally on the axis that remains unchanged even if the type of wheel rim 1 changes, so when the wheel rim 1 changes, the axis of the wheel rim 1 changes to the plates 8 and 9.
It must be carried into the leak test equipment 3 so that it is aligned with the axis of the pipe. For this purpose, tact conveyor 2
The length of the attachment 4 in the axial direction of the wheel rim 1 changes according to the width H of the wheel rim 1, and the height of the tact conveyor changes according to the change in the diameter D of the wheel rim 1. The vertical position changes each time.

The plate 8 to which the core 13 is attached and the cylinder device 10 that drives the plate 8 are connected to the rail 1.
4 in a direction parallel to the conveyance direction of the wheel rim 1, and its driving is performed by a separately provided cylinder device 15. It is designed so that it can be brought to a position that is shifted from the original position.

Guides 16 for transporting the wheel rim 1 are provided on both sides of the tact conveyor, and the portion of the guide 16 in front of the core 13 that has been positioned is a door 17 that can be opened and closed. There is.

Next, the operation of the above device will be explained. The wheel rim 1, which is formed into a rim shape by rolling a flat plate and butt welding its ends, is sent to a leak test device 3 by a tact conveyor and subjected to a leak test to check whether there are any defects in the welded parts, etc. . The plates 8 and 9 of the leak test device 3 are driven on a constant axis. However, when the car model changes, the wheel rim 1 flowing on the line changes in width H and diameter D.
Therefore, when the type of wheel rim 1 changes, the core 13 must be replaced.

Conventionally, as described above, the core 13 has been replaced by approaching it from an oblique direction, making it difficult to approach and resulting in an unnatural working posture. However, in the present invention, the cylinder device 15 moves the core 13, the plate 8, and the cylinder device 10 upstream in the wheel rim transport direction, and the plate 8 with the core 13 attached is moved from the opposing plate 9. Shift the position in the wheel rim transport direction, open the door 17 located in front of the core at the shifted position, approach the core 13 from the front with no obstructions in front of the core 13, and remove the core. The child 13 can be replaced. Once the core 13 has been replaced, the cylinder device 15 brings the core 13, plate 8, and cylinder device 10 back to the position facing the plate 9, thereby completing the core replacement work. .

[Effect of the invention] When using the core replacement device of the leak test cylinder device of the present invention, the plate position facing the core in the wheel rim transport direction can be shifted, so when the core is replaced, , the core can be replaced by bringing the core to a position where there are no obstructions in front, and the core replacement work can be facilitated. In addition, the position of the core can be shifted up, down, left,
It may be in any of the right, front, and rear directions.

[Brief explanation of the drawing]

Fig. 1 is a front view of the leak test device and its vicinity in a wheel rim production line equipped with the core replacement device of the present invention, Fig. 2 is a plan view of the vicinity of the leak test device in Fig. 1, and Fig. 3 is a plan view of the vicinity of the leak test device in Fig. The figure is a front view of the core replacement device and its vicinity. 1... Wheel rim, 3... Leak test device, 8, 9... Plate, 10, 11... Cylinder device, 13... Core, 15... Cylinder device,
17...door.

Claims (1)

[Scope of utility model registration request] A wheel that is installed in the middle of a wheel rim manufacturing line and has a pair of plates that are pressed against openings at both ends of the wheel rim by a cylinder device to seal the inside of the wheel rim, and a core that is attached to one of the pair of plates. In the rim leak test device, the core, the plate to which the core is attached, and the cylinder device that presses the plate against the wheel rim are configured to be able to shift their relative positions with respect to the other plate. A core replacement device for a leak test device, characterized in that it is provided with a drive device that shifts the core of the leak test device.