JPH01159142A - Bent pipe assembling device - Google Patents

Abstract

PURPOSE:To check the automatic assembly of a bent piece and the assembly attitude disorder by forming a guiding inclined surfaces for correcting the assembly attitude of the pipe onto the both side surfaces of a bent pipe receiving slit which is formed on a pressing head and installing a pipe attitude inspecting means. CONSTITUTION:A press-fitting unit 4 is lowered to a prescribed position, and a hydraulic head 18 is advanced by the extension of a driving cylinder 21, and a guide pipe 1 is press-fitted. When the pipe 1 is inserted into a slit 22 by the lowering of the head 18, the attitude of the pipe 1 is corrected by the guiding inclined surfaces 22a and 22a on the both sides of the slit 22, and said pipe 1 is assembled. When the press-fitting of the pipe 1 is completed, the head 18 and the unit 4 are raised by the contraction of the cylinders 21 and 28, and a TV camera 5 is advanced again to detect the top edge of the pipe 1 which is assembly-completed. When it is judged that the assembly attitude of the pipe 1 is within an allowable range, the TV camera 5 is retreated, and after the cord guards 30 and 31 are raised, a lifter 7 is lowered to deliver the cylinder block W.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an assembly device for a bent pipe having a curved shape, such as an oil level gauge guide pipe for an engine.

(Prior art and problems to be solved by the invention) For example, when assembling a curved pipe such as an engine oil level gauge guide pipe into a cylinder block, the space around the assembly position is narrow; Due to the difficulty of applying pressing force to bent pipes, it is difficult to automate the assembly work, and currently the only option is to do it manually using an impact hammer or the like.

The present invention has been made in view of the above points, and makes it possible to automatically assemble bent pipes, which has been difficult to automate in the past. The purpose is to make it possible to check accurately.

(Means for solving the problems) In the present invention, as means for solving the above problems,
A bent pipe assembling device having a pressing head disposed opposite to a workpiece placement station and configured to press fit a bent pipe that has been temporarily assembled in advance into a workpiece positioned at the workpiece placement station, A slit capable of receiving the curved pipe is formed in the press head, and guide slopes are formed on both sides of the slit to correct the assembled posture of the curved pipe, and the posture of the curved pipe after press-fitting is corrected. An inspection means is attached to determine the quality of the product.

(Function) In the present invention, the following effects can be obtained by the above means.

That is, after inserting the bent pipe, which has been temporarily assembled in advance on the workpiece positioned at the workpiece placement station, into the slit of the pressing head placed opposite to the workpiece, the pressing head presses the bent pipe into the workpiece. By doing so, the bent pipe is automatically assembled while its posture is corrected by the guide slope of the pressing head. After the assembly is completed, the inspection means determines whether the assembled posture of the bent pipe is good or bad, thereby accurately detecting defects in the assembled posture that may occur during automatic assembly. .

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The bent pipe assembly device of this embodiment is used to press fit a guide pipe 1 for guiding an oil level gauge of an engine into a proper position of a cylinder block W, which is a workpiece to be assembled. As shown in FIGS. 1 and 2, there is a positioning device 3 for positioning the cylinder block W transported by the transport means 2 to the workpiece placement station S, and a positioning device 3 located opposite to the cylinder block W positioned by the positioning device 3. The guide pipe l that is arranged and temporarily assembled to the cylinder block W in advance
The guide pipe 1 is provided with a press-fitting unit 4 that acts to press-fit the guide pipe 1, and a television camera 5 that acts as an inspection means for determining the quality of the assembled posture of the guide pipe 1 after the press-fitting.

The positioning device 3 is provided on a base 6 so as to be movable up and down, and is configured to position a lid 7, a positioning jig pallet 8 attached to the lifter 7, and the positioning jig pallet 8 at a predetermined position. It consists of a positioning cylinder 9 and a stopper 10. The lifter 7 is provided with a lifting platform 12 connected to the upper end of the piston rod lla of the lifting cylinder 11, so that the positioning jig pallet 8 on the lifting platform 12 is moved upward by the extension operation of the lifting cylinder 11. It has become. The positioning jig pallet 8 is configured to be able to support the cylinder block W conveyed by the conveyance means 2, and includes a positioning cylinder 9 and a stopper 10 provided before and after the jig pallet 8. It is positioned at a predetermined position. Reference numeral 13 denotes a guide rod that guides the lifting platform 12 during lifting and lowering operations, 14 a cylinder for lifting and lowering the positioning cylinder 9, and 15 a stopper 10.
It is a cylinder for raising and lowering.

The press-fit unit 4 is vertically movable along a guide rail 17 formed on a vertical frame 16 erected on the base 6, and has a press head configured to press-fit the guide pipe 1. Rotary table 1 having a plurality of 18
9, an index rotatable motor 20 which acts as a driving means for rotationally driving the rotary table 19, and a drive cylinder for press-fitting and operating selected press heads 18, 18, . . . on the rotary table 19. 21
It consists of

The pressing head 18 is a guide pipe! Multiple types are available depending on the type. For example, as shown in FIGS. 3 and 4, it is applicable to a type that has a press-fitting ring 1a at the end of the guide pipe l on the press-fitting side, or as shown in FIG. Products that can be adapted to those that do not have a press-fit ring at the end are available. A slit 22 capable of receiving the guide pipe I is formed in the pressing head 18, and guide slopes 22a, 22a for correcting the attitude of the guide pipe 1 are formed on both sides of the slit 22. ing. The slit 22 has a shape that follows the shape of the guide pipe 1 so as to be able to receive the peripheral surface of the corresponding guide pipe 1. Further, in the case of the pressing head 18- shown in FIGS. 3 and 4, the press-fitting ring 1a of the guide and pipe I can be locked and pressed at the lower end opening 22b of the slit 22. In the case of the pressing head I8 shown in FIG. 5, the guide pipe 1 is pressed by the inner inner wall 22c of the slit 22, and a claw 22d is formed at the upper end of the slit 22 to prevent the upper end of the guide pipe 1 from coming off. There is.

A pulley 23 pivoted on the upper end of the rotary shaft 19a of the rotary table 19 and a pulley 24 of the motor 20 are connected via a belt 25 so that they can rotate synchronously, and the indexing rotation of the rotary table 19 causes the pressing head ts to rotate. ,ts・
(i.e. cylinder block W
(corresponding to the type of guide pipe l to be press-fitted) is positioned at the press-fitting position. Reference numeral 26 is a speed reducer, and 27 is a rotary encoder.

The press-fitting unit 4 is connected via a wire 29 to a cylinder 28, which is a driving means provided on the vertical frame 16, and can be moved up and down when the cylinder 28 is extended. Reference numerals 30 and 31 are proximity switches for detecting the upper and lower limit positions of the press-fit unit 4, and 32 is a cord guard provided on the vertical frame 16 so as to be movable up and down. It acts to evacuate cords placed near the press-fitting point so that they do not get in the way of press-fitting. Reference numeral 36 is a vertical cylinder for vertically moving the cord guard 32°32.

The television camera 5 is installed to move forward and backward with respect to the vertical frame 16, and detects the guide pipe 1 temporarily assembled to the cylinder block W in the forward state and the tip of the guide pipe 1 after being press-fitted. It is designed so that it can be retracted to the vertical frame 16 side during engineering work. This TV camera 5
The detected image is displayed on a suitable display device (not shown), and the suitability of the assembly posture is determined based on the suitability of the image. Reference numeral 33 is a bracket supporting the TV camera 25, 34 is a horizontal cylinder for moving the TV camera 5 forward and backward, and 35 is a cylinder.
is the guide rod.

Next, the operation of the illustrated bent pipe assembling device will be explained.

First, before the cylinder block W is carried in by the transport means 2, the cord guards 32, 32 are lowered to prepare for the cylinder block W to be carried in.

Then, after the cylinder block W with the guide pipe l temporarily assembled at a predetermined press-fitting point is transported to the workpiece placement station S by the transport means 2, the various elements constituting the positioning device 3, that is, the lifter 7 is raised. When the positioning of the cylinder block W is completed by the operation of the positioning cylinder 9 and the stopper lO, the television camera 5 is moved forward to detect the tip of the guide pipe l.

If it is found through this detection that the type of cylinder block W and the type of guide pipe L do not correspond,
After issuing the NG alarm, the temporary assembly of the guide pipe l to the cylinder block W is corrected. .

If it is determined by the detection by the television camera 5 that the type of cylinder block W and the type of guide pipe L correspond, the television camera 5 is operated backward, and then the rotary table 19 is indexed and rotated. Six pressing heads 18 corresponding to the types of the temporarily assembled guide pipes 1 are placed at press-fitting positions. Thereafter, the press-fit unit 4 is lowered to a predetermined position by the extension operation of the cylinder 28 (detected by the proximity switch 31), and the drive cylinder 2I is further lowered to a predetermined position.
The pushing head 18 is moved forward by the extension operation, and the guide pipe 1 is press-fitted. At this time, when the guide pipe 1 is inserted into the slit 22 of the press head 18 as the press head 18 descends, the guide pipe 1 corrects its posture by the guide slopes 22a, 22a formed on both sides of the slit 22. (see FIGS. 3 to 5), and is assembled in a predetermined assembly posture. When the press-fitting of the guide pipe l is completed, the drive sill 2! After the cylinder 28 is contracted to move the press head 18 and the press-fitting unit 4 upward, the television camera 5 is moved forward again to detect the tip of the assembled guide pipe I.

If it is determined by this detection that the assembled posture of the guide pipe I exceeds the allowable error range, an NG flag is set and the cylinder block W is ejected.

If it is determined that the assembly posture of the guide pipe l is within the allowable error range through detection by the in-plane television camera 5, the television camera 5 is operated backward, and the cord guard 30, 31 is further operated upward. After that, the lifter 7 is lowered to discharge the cylinder block W.

As described above, according to this embodiment, the guide pipe I which is temporarily assembled into the cylinder block W can be automatically press-fitted by the operation of the press-fit unit 4 and the press head 18, and the By determining the assembly posture using the camera 5, defective assembly can be detected at the same location, and the assembly of the guide pipe I to the cylinder block W can be automated.

The present invention is not only applicable to assembling an oil level gauge guide pipe to a cylinder block as in the above embodiment, but also to assembling a bent pipe having a curved shape to an appropriate workpiece.

Further, the present invention is not limited to the configuration of the above-described embodiment; it goes without saying that the design can be changed as appropriate without departing from the gist of the invention.

(Effects of the Invention) According to the present invention, a bending pipe that is disposed opposite to a workpiece placement station and that has been temporarily assembled in advance into a workpiece positioned at the workpiece placement station is press-fitted. In the bending pipe assembly apparatus having a pressing head configured as shown in FIG. In addition to forming a guide slope to guide the bending, we also installed an inspection means to determine whether the posture of the bent pipe is good or bad after press-fitting, so the posture of the bent pipe that is temporarily assembled to the workpiece is automatically corrected by the guide slope of the press head. At the same time, after assembly is completed, inspection means are used to determine whether the assembly posture of the bent pipe is good or bad, and the assembly fine stone is used to accurately detect defects in the assembly posture that may occur during automatic assembly. Therefore, it is possible to automatically assemble bent pipes, and there is an excellent effect that it is possible to check for incorrect assembly posture each time.

[Brief explanation of the drawing]

FIG. 1 is a front view of a bent pipe assembly apparatus according to an embodiment of the present invention, FIG. 2 is a side view of the bent pipe assembly apparatus shown in FIG. 1, and FIG. 3 is a bent pipe assembly shown in FIG. 1. 4 is a bottom view of the pressing head shown in FIG. 3, and FIG. 5 is a view corresponding to FIG. 3 showing another example of the pressing head. l...Bent pipe (guide pipe) 5...
...Inspection means (TV camera) 18...Press head 22...Slit 22a...Guide slope S...Work placement station.

Claims (1)

[Claims] 1. A bent pipe assembling device which is arranged opposite to a workpiece placement station and has a pressing head configured to press fit a bent pipe that has been temporarily assembled in advance into a workpiece positioned at the workpiece placement station. A slit capable of receiving the bent pipe is formed in the pressing head, and guide slopes are formed on both sides of the slit to correct the assembled posture of the bent pipe, so that the bending pipe can be fixed after press-fitting. 1. A bent pipe assembling device, comprising: an inspection means for determining whether the posture of the bent pipe is good or bad.