JPH0146257B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tightening head of a multi-axis tightening device that simultaneously tightens a workpiece having a plurality of tightening points using a multi-axis tightening head. This invention relates to a head-exchangeable multi-shaft fastening device that can be freely replaced as needed.

The applicant had previously applied for a patent application for this type of device in 1983.
No. 148445 (see Japanese Unexamined Patent Publication No. 58-51028) discloses a multi-axis tightening head which is selectively connected to the workpiece on the tightening station via an indexing device on the tightening station for installing the workpiece. We have proposed a device that is equipped with a plurality of tightening devices and a supply device that has a sorter for tightening fittings in order to supply several types of selected tightening fittings to the tightening device.

However, in the above device, the tightening fittings are supplied from the supply device to the tightening device by air pressure through the transfer tube, which not only makes the means for transferring the tightening fittings complicated, but also tends to damage the inner surface of the tube. If the seal is scratched, the fastening fitting may get caught on the scratch, causing inconveniences such as difficulty in smooth transfer.

The present invention is aimed at improving such inconveniences, and the fastening fittings are transferred from the supply device to the tightening device by dropping, and the selected fastening fittings are appropriately placed in a standby position. This prevents the liquid from falling and being supplied immediately.

To explain this with reference to the illustrated embodiment, reference numeral 1 denotes a tightening device, and the device 1 is formed of a plurality of multi-axis tightening heads 2, and these heads 2, 2, . . .
The column 3 is supported by an annular rail 4 provided on the column 3.
One of them is selected on a tightening station 6 on which the workpiece a is installed by the indexing device 5 above, and a lifting cylinder 7 sets the tightening fitting holder 8 at the tip of the head 2 so that it approaches and separates from the workpiece a. Furthermore, the head 2 is connected to a compressed air source, which is a power source (not shown), and a supply device 10, which will be described later, via a connecting head 9 connected thereto, and has a tightening fitting supplied into the holder 8. It is provided so as to be engaged with a socket driven by an upper nut runner (not shown) and screwed into a screw hole in a workpiece.

10 is a supply device for fastening fittings, and this device 10 includes:
It consists of a storage case 11 that stores several types of fasteners, and a fastener sorter 13 that is connected to the case 11 via a lead-out path 12. The sorter 13 is a storage case that stores the fasteners vertically. It is connected to block 14.

The tightening device 1 and the supply device 10 are similar to those of the previously filed Japanese Patent Application No. 148445/1982, but in the present invention, the supply device 10 is connected to the tightening device 1 through a frame 15. The device 16 is installed on the top of the connecting head, and transfers the tightening fittings from the supply device 10 to the tightening device 1 by gravity falling through a guiding transfer device 16. A plurality of distribution tubes 17 to be communicated with the distribution tubes 17 are arranged in a row so that their insertion holes 17a open toward the upper surface. Block 1
The guide plate 19 has a plurality of passages 19a arranged in a row so as to communicate between the discharge port 14a of the tube 17 and the insertion hole 17a of the tube 17 opening on the distribution frame 18. It is connected to the first cylinder 20 which is pivotally supported, and is provided so as to be switchable between an upright position where the passage 19a is aligned with the insertion hole 17a and an inclined position where the passage 19a is out of alignment with the insertion hole 17a. 18 is pivotally supported by a bracket 21 on the pedestal 15 and connected to a second cylinder 22 which is pivotally supported on the pedestal 15, so that the guide plate 19 is in an upright position where the passage 19a of the guide plate 19 coincides with the discharge hole 14a of the storage block 14. A stopper 23 provided on the guide plate 19 is provided so as to be freely switchable between an inclined position and a position where the stopper 23 closes the discharge hole 14a. In the figure, numeral 24 indicates a cylinder for actuating the connecting head 9.

Next, to explain its operation, the clamping fittings in the supply device 10, which are sorted according to the type of work by the sorter 13, fall into the storage block 14, and at this time, the guide plate 19 of the guide transfer device 16 2
Due to the operation of the cylinder 22, the distribution frame 18 is opened as shown in the fourth figure.
Due to the inclination of the stopper 23, the discharge hole 14
When a is in the closed state, the tightening fittings are in block 14.
The multi-spindle tightening head 2 is moved to match the workpiece a, which is then placed on the tightening station 6 by the operation of the indexing device 5 of the tightening device 1.
, connect the connecting head 9 to the selected head 2, return the second cylinder 22, and as shown in FIG. Thus, the fastening fitting is supplied into the holder 8 through the distribution tube 17 and is fastened by abutting the holder 8 against the workpiece. Note that when the type of workpiece a changes and the first step is to select new fastening fittings for the change, the first cylinder 20 is checked to confirm that the fastening fittings are inserted into the prescribed distribution tube 17. When activated, the passage 1 of the guide plate 19 is opened as shown in FIG.
9a is removed from the insertion hole 17a of the distribution tube 17 so that the fastening fitting can be released to the outside.

In this way, according to the present invention, the supply device 10 and the tightening device 1 are vertically connected via the tightening fitting guide and transfer device 16, and the guide and transfer device 16
This is a distribution frame 1 in which a plurality of distribution tubes 17 are listed which are pivotally supported on a pedestal 15 on which the supply device 10 is placed and which communicate with the connection head 9 of the tightening device 1.
8, a guide plate 19 which is pivotally supported by the distribution frame 18 and has passages 19a arranged in a row that communicate with the discharge port 14a of the storage block 14 on the side of the supply device 10 and the distribution tube 17;
9 and disengages the passage 19a of the plate 19 from the distribution tube 17.
The first cylinder 20 tilts the first cylinder 20 and the stopper 23 of the guide plate 19 connected to the distribution frame 18 and pivotally supported by the distribution frame 18 closes the discharge port 14a of the storage block 14.
Since it is formed from the second cylinder 22 which is inclined from the first cylinder 20, it is possible not only to easily form a supply path for the fastening fittings by natural falling, but also to
By the operation of
By the operation of step 2, the tightening fittings are put on standby in the storage block 14, which has the effect that the tightening fittings can be accurately supplied to the selected tightening device 1 and the supply can be started smoothly. .

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway side view, and FIG. 2 is a partially cutaway side view taken along line A-A in FIG. 1. Figure 3 is a view taken along the line B-B in Figure 2, and Figures 4 to 6 are
It is an explanatory view showing the operating state in a sectional view taken along the line C-C in the figure.
14... Storage block, 16... Guide transfer device, 17
...Distribution tube, 18...Distribution frame, 19...Guide plate.

Claims (1)

[Claims] 1 A tightening device including a plurality of multi-axis tightening heads that are selectively coupled to the workpiece via an indexing device on a tightening station for installing the workpiece, and a selected multi-axis tightening head of the tightening device. A head-replaceable multi-shaft fastener consisting of a fastener supply device with a fastener sorter installed on a stand above the tightening station to supply selected fasteners via a connecting head connected to the head. The attachment device is provided with a tightening fitting guide and transfer device that connects the supply device and the tightening device vertically, and the guide and transfer device is connected to a distribution tube that is pivotally supported on the pedestal and communicates with the connection head. a distribution frame in which a plurality of units are arranged in a row; a guide plate that is pivotally supported by the distribution frame and has a passage connected to the outlet of the storage block on the supply device side and the distribution tube; and a guide plate that is connected to the guide plate. a first cylinder for tilting the guide plate so that the passageway of the guide plate is removed from the distribution tube; and a stopper of the guide plate connected to and pivotally supported by the distribution frame; A head exchangeable multi-shaft tightening device comprising a second cylinder which tilts the distribution frame so as to close the discharge port of the storage block.