JP4548957B2 - Knock pin position adjusting device and position adjusting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a position adjusting device capable of easily and accurately adjusting the position of a knock pin for positioning a workpiece at a predetermined position, and a position adjusting method using the adjusting device.
[0002]
[Prior art]
A work such as an engine is transported along a line in a state of being fixedly placed on a transport pallet, and processed or assembled with another member during this time. And since it is necessary to fix the work to a fixed position with respect to the transport pallet in order to perform processing and assembly automatically, conventionally, the transport pallet has been provided with a knock pin, and this knock pin is provided in the reference hole provided in the work. To position the workpiece.
[0003]
If the type of workpiece is different, the position of the reference hole provided in the workpiece is also changed, so that the position of the knock pin must also be changed. If a transport pallet is prepared for each type of workpiece, it is not necessary to change the position of the knock pin, but this is wasteful and not realistic. Although it is conceivable to provide a large number of knock pins on one pallet, the knock pins must be arranged so as not to interfere when placing a work, and the versatility is poor.
[0004]
Therefore, it is also conceivable that the position of the knock pin itself can be adjusted as disclosed in Japanese Utility Model Publication No. 59-136241.
[0005]
[Problems to be solved by the invention]
The content disclosed in Japanese Utility Model Publication No. 59-136241 is that the knock pin itself is eccentrically formed on a rotatable shaft, and the position of the knock pin is adjusted by rotating the shaft. The range is narrow and delicate adjustment is difficult, and it is impossible to adjust to an arbitrary position within a predetermined plane.
[0006]
Therefore, the present applicant has previously proposed a workpiece positioning device capable of adjusting the position of the knock pin to an arbitrary position on a plane parallel to the pallet and locking at an arbitrary position as Japanese Patent Application No. 11-307128.
[0007]
According to the workpiece positioning device, a large number of workpieces having different reference hole positions and pitches can be positioned. However, there remains a problem that it takes time and effort to adjust the position of the knock pin.
[0008]
Incidentally, in JP-A-5-145297, although not a knock pin on a conveyance pallet, a laser beam is irradiated from a laser pointer to adjust the position of a rail on which a substrate is placed, and a mark is aligned with this laser beam. Thus, a technique for adjusting the position of the rail is disclosed.
However, it takes time and effort to accurately align the mark with the laser beam.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, a knock pin position adjusting device according to the present invention is provided adjacent to a transport path of a transport pallet having a knock pin whose position is adjustable, for example, and is moved up and down relative to the transport pallet. And a positioning pin or a receiving portion for positioning by engaging with a part of the transport pallet, and a reference for engaging a knock pin with the positioning auxiliary device. A hole is provided, and a laser pointer that irradiates a laser beam toward the conveyance pallet through the reference hole is disposed above the positioning assist device.
[0010]
By adopting such a configuration, after performing a rough position adjustment of the knock pin using laser light, to engage the transport pallet and the positioning auxiliary device and perform a rough accurate position adjustment of the knock pin, The position of the knock pin can be quickly adjusted.
[0011]
The laser pointer can be detachably attached to a laser pointer receiver that moves up and down integrally with the positioning assist device. With such a configuration, the number of laser pointers can be reduced.
[0012]
Further, the position adjustment of the knock pin according to the present invention is performed by irradiating the laser beam from the laser pointer toward the conveyance pallet through the reference hole provided in the positioning auxiliary device, and the position of the knock pin so that the knock pin overlaps the optical path of this laser beam. In this state, the positioning auxiliary device is lowered to the position of the conveying pallet to engage the positioning auxiliary device and the conveying pallet, and at the same time, the knock pin is engaged with the reference hole provided in the positioning auxiliary device. The position of the knock pin was accurately positioned, and then the knock pin was locked.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a front view of a knock pin position adjusting device according to the present invention, FIG. 2 is a side view of the knock pin position adjusting device, FIG. 3 is a view taken along arrow AA in FIG. 1, and FIG. -B direction arrow figure, FIG. 5 is a perspective view of the conveyance pallet provided with the positioning jig, FIG. 6 is a front view of the state which lowered the positioning auxiliary | assistance apparatus.
[0014]
In the figure, reference numeral 1 denotes a conveyance path, and the conveyance path 1 has two upper and lower stages of a forward path and a backward path, and a conveyance pallet 3 is placed on a roller 2 that is rotated by a motor (not shown) in both the forward path and the backward path.
[0015]
As shown in FIG. 5, positioning pin receiving portions 4, 4 are provided at two corner portions located on the diagonal line on the upper surface of the conveyance pallet 3, and two positioning jigs 5, 5 are provided at the center portion. 5 is provided.
[0016]
In the positioning jig 5, the ring member 7 and the arm member 8 are rotatably supported with respect to the base 6, the base member of the first link member 9 is supported on the ring member 7, and the arm member 8 is supported on the first end. The base end portions of the two link members 10 are pivotally supported, the tip portions of the first link member 9 and the second link member 10 are overlapped, and the knock pin 11 is supported in common at the overlapped portion.
[0017]
Thus, the knock pin 11 can be manually adjusted to an arbitrary position in a plane parallel to the upper surface of the transport pallet 3 in a state where the ring member 7 and the arm member 8 can freely rotate. And after adjusting to arbitrary positions, the said position is fixed with the lock mechanism which is not shown in figure.
[0018]
On the other hand, the knock pin position adjusting device 20 according to the present invention is provided adjacent to the conveyance path 1 of the conveyance pallet 3.
The frame 21 of the position adjusting device 20 is provided with upper and lower rails 22 and 22 in parallel, and a lifting block 23 is engaged with the rails 22 and 22.
[0019]
Further, a spring balancer 24 is suspended from the frame 21, and the elevating block 23 is urged upward by hooking the elevating block 23 on the hook of the spring balancer 24. It raises to the position where it abuts.
[0020]
The lifting block 23 is provided with a forward projecting portion 26, and a plate-like positioning assist device 28 is supported on the lower surface of the projecting portion 26 via a bearing mechanism 27.
[0021]
Positioning pins 29, 29 for positioning the positioning assisting device 28 itself by engaging with the receiving parts 4, 4 of the transport pallet 3 are attached to the lower surface of the positioning assisting device 28. Are provided with handles 30, 30 held by an operator.
[0022]
An operator pushes down the positioning auxiliary device 28 against the spring balancer 24 while holding the handles 30, 30, and further rotates the positioning auxiliary device 28 via the bearing mechanism 27 to receive the positioning pins 29, 29. Match 4 and 4.
[0023]
The positioning assisting device 28 is formed with a plurality of reference holes 31. The reference hole 31 is provided for each model, and the position of the knock pin 11 is accurately adjusted by the engagement of the knock pin 11. Note that the lower portion of the reference hole 31 and the tip of the knock pin 11 are tapered, so that the knock pin 11 and the reference hole 31 are completely engaged even if there is a slight misalignment before the engagement.
[0024]
On the other hand, a plurality of arms 32... Are attached to the overhang portion 26, and a laser pointer receiver 33 is provided at the tip of each arm 32. The laser pointer receiver 33 is located immediately above the reference hole 31, and the laser pointer 34 is detachable.
[0025]
A procedure for adjusting the position of the knock pin 11 using the position adjusting device 20 having the above configuration will be described. First, the transport pallet 3 is transported on the transport path 1 and stops at a predetermined position. At this time, the positioning assisting device 28 of the position adjusting device 20 is positioned upward by the lifting force of the spring balancer 24.
[0026]
Next, a laser pointer 34 is mounted on a laser pointer receiver 33 corresponding to the model of the workpiece to be placed and fixed on the transport pallet 3, and laser light is irradiated downward. Then, since the reference hole 31 corresponding to the model of the workpiece is formed immediately below the laser pointer receiver 33, the laser light passes through the reference hole 31.
[0027]
The laser beam that has passed through the reference hole 31 is irradiated as a red dot that can be visually recognized on the transport pallet 3. Therefore, the ring member 7 and the arm member 8 of the positioning jig 5 are manually rotated, and the position of the knock pin 11 is adjusted so that the red point of the laser beam overlaps the upper surface of the knock pin 11. This operation completes the rough position adjustment of the knock pin.
[0028]
Next, as shown in FIG. 6, the positioning auxiliary device 28 is pushed down against the spring balancer 24 by grasping the handles 30 and 30, and the positioning pin 29 of the positioning auxiliary device 28 is engaged with the receiving portion 4 of the conveying pallet 3. The positioning assist device 28 is positioned. At this time, since the tip of the positioning pin 29 is tapered, it is automatically corrected even if the positioning pin 29 and the receiving portion 4 are slightly misaligned. Positioning can be performed by slightly rotating the device 28 itself through the bearing mechanism 27.
[0029]
Further, as described above, since the rough alignment of the knock pin 11 and the reference hole 31 using the laser beam has already been completed, the knock pin 11 is engaged with the receiving portion 4 so that the knock pin 11 is moved to the reference hole 31. And the correct position adjustment of the knock pin 11 is completed.
[0030]
Thereafter, the ring member 7 and the arm member 8 of the positioning jig 5 are locked and fixed so that the position of the knock pin 11 does not move, the transport pallet 3 is transported along the transport path 1, and the workpiece is placed at a predetermined position. Mount on pallet.
[0031]
When a command for placing a different workpiece is issued, the laser pointer 34 is inserted into the laser pointer receiver 33 on the reference hole 31 corresponding to the workpiece, and the same operation as described above is repeated, so that the knock pin 11 After the accurate position adjustment is performed, the transport pallet 3 is sent downstream.
[0032]
The present invention is not limited to the above embodiments. For example, in the embodiment, the position adjusting device 20 is disposed adjacent to the transport path 1 of the transport pallet 3, but may be provided at a location away from the transport path 1.
Further, in the embodiment, the receiving portion 4 for the positioning pin is provided on the conveyance pallet 3 and the positioning pin 29 is provided on the positioning auxiliary device 28. However, the arrangement may be reversed.
In the embodiment, the laser pointer receiver 33 is provided, and the laser pointer 34 is detachable to reduce the number of laser pointers. However, the laser pointer 34 can be directly attached to the positioning auxiliary device 28 or via an arm. You may make it attach.
[0033]
【The invention's effect】
As described above, according to the present invention, the positioning assist device is lowered and engaged with the transport pallet, and accordingly, the knock pin is engaged with the reference hole of the positioning assist device to accurately adjust the position of the knock pin. In this case, since the rough position adjustment of the knock pin is performed in advance using the laser beam, the knock pin is not detached from the reference hole of the positioning auxiliary device, and the position adjustment can be accurately performed in a short time.
[0034]
In addition, by providing a laser pointer receiver and making the laser pointer detachable, it is possible to reduce the number of laser pointers and to provide a position adjusting device that can handle many models.
[0035]
Furthermore, since the knock pin position adjusting device according to the present invention can be grounded adjacent to the transport path of the transport pallet, the position of the knock pin can be easily and quickly adjusted without changing the line configuration. By applying to a mixed line where different workpieces are sent continuously, work efficiency is greatly improved.
[Brief description of the drawings]
FIG. 1 is a front view of a knock pin position adjusting device according to the present invention. FIG. 2 is a side view of the knock pin position adjusting device. BB direction arrow view [FIG. 5] A perspective view of a transport pallet provided with a positioning jig [FIG. 6] A front view of a state where the positioning auxiliary device is lowered [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Conveyance path, 2 ... Roller, 3 ... Conveying pallet, 4 ... Positioning pin receiving part, 5 ... Positioning jig, 6 ... Base, 7 ... Ring member, 8 ... Arm member, 9 ... First link member, 10 ... Second link member, 11 ... knock pin, 20 ... position adjusting device, 21 ... frame, 22 ... rail, 23 ... lifting block, 24 ... spring balancer, 25 ... stopper, 26 ... overhang, 27 ... bearing mechanism, 28 ... positioning Auxiliary device, 29 ... positioning pin, 30 ... handle, 31 ... reference hole, 32 ... arm, 33 ... laser pointer receiver, 34 ... laser pointer.

Claims (3)

In a positioning device for accurately determining the position of a knock pin provided on a transport pallet, the positioning device includes a positioning assist device that moves up and down relative to the transport pallet. A positioning pin or a receiving portion for positioning by engaging with a portion is provided, a reference hole for engaging the knock pin is provided in the positioning auxiliary device, and further, the positioning auxiliary device is conveyed through the reference hole. A knock pin position adjusting device, wherein a laser pointer for irradiating laser light toward a pallet is arranged. 2. The knock pin position adjusting device according to claim 1, wherein the laser pointer is detachably attached to a laser pointer receiver that moves up and down integrally with the positioning auxiliary device. 3. A position adjusting method using the knock pin position adjusting apparatus according to claim 1 or 2, wherein the laser light from the laser pointer is irradiated toward the conveying pallet through a reference hole provided in the positioning auxiliary device, and the laser light is irradiated. Roughly adjust the position of the knock pin so that the knock pin overlaps the optical path, and in this state, lower the positioning assist device to the position of the transport pallet and engage the positioning assist device with the transport pallet. At the same time, position the knock pin. A position adjusting method comprising: engaging a reference hole provided in an auxiliary device to accurately position a knock pin; and then locking the knock pin.

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