JPS6094274A - Clamping device for nut - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] This invention relates to a Nando thin separator for automatically tightening a nut onto a threaded portion of a bolt.

[The technical backbone of the invention and one point in between]

A nut runner is known as a device that automatically tightens nuts. This socket is attached to the rotary shaft of the recommended motor via a slide shaft, and this socket IC
M4 A nut that should be tightened is attached and tightened to the threaded part.

By the way, the method of determining whether or not the nut runner's screw part has been completely tightened was to indirectly detect the current value of the nut runner's drive motor based on the time (rotation time of the socket). . L7 In the past, even if a nut gets into the tip of the threaded part diagonally and gets bitten, the motor flow value and tightening may change depending on the time and the nut tightening problem may occur. The drawback is that nut tightening detection is unreliable.

[Purpose of button]

This invention was made in view of the above circumstances, and its purpose is to accurately determine whether or not the tightening of the bolt thread 15V (Vt1-t) to the threaded part of the bolt is completed when tightening the nut. The present invention aims to provide a nut transfer device that can be detected.

[Summary of the invention]

This starting motor (starting motor of the put runner)
It is important to check whether the torque changes or not (the stroke of the socket to be engaged is detected and the tightening of the socket to the J-jet part has been completed) or not.

[Nine cases of IJ CD]

Below 1. I will also explain one example of VC that shows this story on the front page of the magazine. In FIG. 1, 1 is a robot, and the rotating arm 21/C of the robot is provided with a hand and a no. This head 7 is provided with a Z tool 4 that is movable in the Z-axis direction, and these two tables 4 are driven by a drive 4g/+i'7.
5 It is raised and lowered by VC. A Nand runner 7 shown in the second section 1 and the third section ml' is attached to this Z table 4. A joint pipe 9 is attached to the rotating shaft 8 of the put runner 7. This joint pipe 9 is connected to a spline shaft 1 via a pole bearing JOf.
The shaft is freely supported.

The lower end VC of this spline shaft 1) is directly connected to a main shaft 12, and this main shaft J2 is rotatably supported by a fixed base 14 via a ball bearing 13. The fixed stand 4 is fixed to the two tables 4 and is integrally mounted with the Noodle runner 7.

moreover.

At the lower end of the main shaft 2, a socket 75 and a socket 16 are each fixed in one turn by screws. This socket J6 is provided with a dodecagonal engagement hole J7, which is adapted to engage with the Nand 1B. Additionally, a puffer net 19 is provided within the retaining buff to magnetically attract the pad 8 within the engagement hole 17.

On the other hand, the fixed base 14VL is provided with a t-bearing body 20 adjacent to the ZOL bearing J3, and a vertically movable lifting rod 2 is provided on this bearing body ZO. A detected object 22 is fixed to the upper end of this elevating rod 21, a spring receiver 23 is fixed to the lower end, and the elevating rod 2J is fixed between the upper iC bearing body 20 and the spring receiver 23. A biasing spring 24 that biases downward is interposed. and.

A piece 25 is integrally provided on the splash receiver z3 and projects laterally, and a cam floor 26 which rolls into contact with the upper surface of the (b) rotation circle FJjl15 is rotatably supported on this piece z5. Furthermore, the above-mentioned fixed base J4 facing the above-mentioned detected object Z2
A center mounting number 27 is protrudingly provided on the center mounting number 27, and a photosensor 2 facing the object to be detected 22V is mounted on the center mounting number 27.
8 is installed. A stroke detector 29 is constituted by the +M detector z2 and the photosensor 28, and the nut runner 7 is provided with a torque detector 30 that outputs a torque rJk according to the %1 flow value.
I-) The detector Z9.30 is designed to detect the tightening state 1 of the NAND 18 against the threaded portion 3, that is, whether the NAND J8 is tightened or not.

Next, the operation of the above embodiment will be explained. f)
', As shown by the solid line in Fig. 2, the threaded part, v
When the drive mechanism 5 fL moves the Z table 4 places P4 with the nut to be tightened 18 degrees, the number 8 comes into contact with the front part 9 of the number 3. In this state, when the nut runner 7 is driven, the rotation shaft 8 rotates once, and the rotational force is transmitted to the spline shaft 1 through the joint pipe 9.
1, and further, the 1 socket 16 rotates via the main shaft 12f. Therefore, the nut 18 engaged with the engagement hole 17 of the socket J6 is screwed into the J-shaped portion 3, and as the screwing progresses, the spline shaft J1 is lowered. Then, when the nut J8 descends while rotating with respect to the threaded part 3 and the lower surface of the nut 18 comes into contact with the bidet 32, the first descent of the socket J6 is stopped and the spline shaft 1 is connected to the threaded part 1 through the main shaft 125. The lowering is also stopped and only the rotational force from the nut runner 7 is transmitted. On the other hand, the spline shaft J1 has a biasing spring 2
Since it continues to descend by 4, the disk 15 rotates once,
Via the rolling cam floor Z6, the splash body Z3 is pushed by a nut 18 or a bidet JZK abutment bolt 1. Once the detected object 22 is in contact with the nut J8, it is either within the detection range of the photo center 28, or it is out of the detection range when it comes into contact. In other words, it is possible to detect that the nut has been tightened to a certain degree.Then, the detection signal is sent to the control circuit 33 manually, and the torque of the nut runner 7 is sent to the torque detector 30.
Since the torque is detected by the detector, if the torque exceeds the set value, it is input to the control circuit 33. Soshi 1. Stroke detector 29. When the output signal from the torque detector 30 is input to the control circuit J3, it is recognized that the nut runner 18 is completely engaged with the threaded portion 3, and the nut runner 2?
make it stop. Then, the drive mechanism 5 is operated in the opposite direction to raise the second table 4f, and the socket J6 is connected to the NAND 1B.
The nut 18 has been completely tightened.

[Effect of start]

As explained above, according to the invention VC, the drive motor V of the Nand runner (a torque detector for detecting the applied torque and a stroke detector for detecting the stroke of the socket) can be used for tightening the same part. Since this recognition is made, it is possible to accurately recognize whether or not the tightening of the nut is completed.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the entire device, FIG. 2 is a partially cutaway front view of the main body, and FIG. 3 is a side view. -)...Robot, 2...
Nut runner, 5...Starter J Jt;-...Socket, 1B...Nut, 29...Stroke detector,
30...torque & output.

Claims (1)

[Claims] A magnet for sucking nands is provided in the socket of a nut runner provided on the arm of the robot. A torque detector for detecting all the torque applied to the drive motor of the nut runner in the production of a Nand shaft for tightening the Nand to the threaded part by lowering the socket f while rotating;
A NAND tightening device that recognizes the completion of delivery to a NAND threaded portion using a stroke detector that detects the stroke ft of Saturday and Sunday C Nokent.