JPS6076919A - Automatic feeder for stud bolts - Google Patents

Abstract

PURPOSE:To automatically feed stud bolts into an automatic assembly machine by discriminating the length and the direction of the stud bolts having a variety of length which are carried-in in random directions and direction-arranging only the bolts having a prescribed length. CONSTITUTION:A rotor 3 having a guide hole 4 is installed into a cylinder 1. Said rotor 3 can be freely revolved and shifted in the axial direction, and switching between carrying-in position and carrying-out position (both not shown in the figure) is permitted. The carrying-in part 17 of a stud bolt, direction discriminating mechanism 19, and a length detecting mechanism 20 are arranged at the carrying-in position of the cylinder 1, and the longitudinal direction of the carried-in bolt is detected, and only the bolts having a prescribed length are direction-arranged and supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an automatic stud bolt supply device that automatically supplies stud bolts to an automatic assembly device.

[Technical background of the invention and its problems]

When assembling an engine, for example, when tightening stud bolts to the engine frame, this is done by a stud bolt tightening mechanism provided on the head of the assembly robot.

Further, the stud poles are supplied to the tightening mechanism by, for example, a pole feeder, and are chucked one by one or a plurality of studs at a time.

As shown in Fig. 1 (4), there are long stud bolts AI and short stud bolts BI as shown in Figure 1 (4), and it is necessary to selectively supply them depending on the model.

Sometimes short stud bolts A, A2Y are used together.

In addition, both stud bolts A11B1 have their base end Ax
, Bt are flat, and the tips As and Bs are tapered or chamfered in the shape of an arc. As shown in FIG. 2, it is necessary to screw the tips As and Ba Y into the screw holes of the frame C.

However, the pole feeder is stud pole) A,,
It is not possible to align the direction of Bl. Therefore, conventionally, when supplying this type of stud bolt, it has been necessary to use some sort of device to supply the stud bolts with their directions aligned in advance, or to do so manually.

[Purpose of the invention]

This invention was made in view of the above circumstances, and its purpose is to determine the length and direction of stud bolts that are different in length and are brought in in random directions, and to determine the length and direction of stud bolts of a specified length. It is an object of the present invention to provide an automatic stud bolt supply device that can supply only stud bolts in an aligned direction.

[Summary of the Invention] The present invention is provided with a rotor having a guide hole in a cylinder, and the rotor is rotatable and movable in the axial direction so that it can be switched between a carry-in position and a carry-out position. A stud bolt loading section, a direction determining mechanism, and a length detection mechanism are installed at the loading position to detect the length direction of stud bolts carried in from the loading section, and can supply only stud bolts of a specified length with their orientation aligned. That's what I did.

[Embodiments of the invention]

The present invention will be described below based on an embodiment shown in the drawings. 1 in FIGS. 3 to 5 is a cylinder, and a cylinder chamber 2 having a circular cross section is provided in the circular portion. A cylindrical rotor 3 is inserted into the cylinder chamber 2 so as to be freely rotatable and reciprocally movable in the axial direction, and one guide hole 4 is bored in the rotor 3 in the radial direction.

Further, a mounting plate 5 is provided on one side of the cylinder 1,
The mounting plate 5 is provided with a rotary cylinder 6 and a slide cylinder 7 as a drive mechanism for driving the rotor 3.

The rotating shaft 8 of the rotary cylinder 6 is connected to the rotor 3 via a slide joint 9 that is slidable in the axial direction, and the plunger 10 of the slide cylinder 7 is connected to the rotor 3 via a ball joint 11'. . Further, a rotating body 12 is fitted to the other end of the rotating shaft 80 of the rotary cylinder 60, and a stopper 14 that can be pushed and retracted by an air cylinder 13 is provided on the rotation locus of the rotating body 12. Then, the stopping position of the rotor 3 is regulated.

Further, the cylinder 1 is provided with a carry-in position 15 and a carry-out position 16 spaced apart in the axial direction from the mouth to the mouth 3,
When the plunger 10 is retracted by the slide cylinder 7, the guide hole 4 of the rotor 3 faces the carry-in position 15,
When moving forward, it faces the unloading position 16, and the stud poles A, B are placed at the top at 7"5Vc.

A carry-in section 17 is provided, and a proximity switch 18 is attached to the lower part facing this. Similarly, a direction determining mechanism 19 is provided diagonally above the carry-in position 15 of the cylinder 1, and a length detecting mechanism 20 is provided symmetrically thereto. The direction discriminating mechanism 19 has a through hole 21 that opens on the circumferential surface of the cylinder chamber 20, and is inserted into the through hole 21 so as to be able to move forward and backward.
It consists of a detector 23 whose 3a is flush with the circumferential surface of the cylinder chamber 2, and a sensor 24 which faces a rear end 23b of the detector 23. The diameter of the through hole 21 is smaller than the proximal end A2+B2 of the stud poles AI and Bl,
Tip A 3 + B It is formed to have a slightly larger diameter than B. In other words, stud bolt AI, Bl tip As, BsB
It can be inserted into the through hole 21, and at this time, the detector 23'4f can be pushed in to turn on the sensor 24. Conversely, in the case of the proximal ends A2 and B2, it is possible to insert it into the through hole 21. Export child 23? f is held in the forward state, and the sensor 24 is held in the off state. Also,
The length detection mechanism 20 includes an insertion hole 25 that opens on the inner circumferential surface of the cylinder chamber 20, a push rod 26 that is inserted into the insertion hole 25 so as to be able to protrude and retract, and the push rod 26.
It is composed of an air cylinder 27 that advances and retreats. Further, a projecting piece 28 is integrally attached to the middle part of this push rod 26, and a first... A twenty-sixth sensor 29.30 is arranged in parallel. When the stroke of the pushing rod 26 is small, the protrusion 28 faces the first sensor 29 and is turned on; when the stroke is large, the protrusion 28 faces the second sensor 30 and is turned on. The lengths of the studs AI and Bt are detected by the output signals from the sensors 29 and 30.

Further, at the lower part of the unloading position 16 of the cylinder 1, there is provided an unloading section 3 for stud pol) Al y Bl, and the unloading section 3 is provided diagonally downward.

The carry-in portion 17 of the cylinder 1 configured as described above is provided with a base 33, and a carry-in tube 34 connected to a pole feeder (not shown) is connected to the base 33. Further, a supply pipe 35 is connected to the unloading section 3 .

An air pressure inlet 3 is provided diagonally in the middle of this supply pipe 35.
6 is provided, and the air pressure feed port 36 is connected to an air compressor (not shown).
A conveying tube 37 is connected to the tip of this supply pipe 35, and the supply pipe 35 is designed to be supplied to a regular stud pol) AI, BI'Z' stud bolt tightening device, etc. Further, a collection tube 38 is connected to the discharge section 32 to collect non-standard stud polls) AI and Bl 'a'.

Next, the operation of the automatic stud bolt supply device configured as described above will be explained.

It is assumed that the stud bolts A, Bti, which are carried in from the ball feeder via the carry-in tube 34, are a mixture of long and short bolts, and the direction of the stud bolts is also carried in at random.Currently, only the long stud bolt A is considered to be within the specified range. , short stud bolt B will be described below as being discharged as non-standard.

First, if we assume that the stud bolt AI is first passed through the guide hole 4 of the rotor 3, when the guide hole 4 is at the carry-in position 15, this stud bolt AI passes through the guide hole 4 of the rotor 3 through the carry-in portion 17.
is inserted by falling. When the stud bolt A is inserted into the guide hole 4, the proximity switch 18 is turned on and the rotary cylinder 6 is activated. Therefore, the rotor 3 rotates in the direction of arrow a via the rotating shaft 8, and stops with one end of the guide hole 4 facing the direction determining mechanism 19 and the other end facing the length detecting mechanism 20. Next, when the air cylinder 27 is actuated, it advances toward the push rod 26, and its tip protrudes into the guide hole 4 to suppress the internal stud hole.

In this case, the stud length Attff is smaller than the specified length, the protruding piece 28 faces the first sensor 29, and the first sensor 29 is turned on. Further, since the tip A of the stud ash is oriented upward, the tip A is inserted into the through hole 21 by the pressing force of the push rod 26. Therefore, the detector 23 is retracted against the restoring force of the spring 22, the sensor 24 is turned on, and it is confirmed that the stud bolt A has been carried in the correct direction. When the length and direction of the stand bolt AI are detected, the push rod 26 is returned to its original position by the air cylinder 27. Then, when the rotary cylinder 6 rotates in the direction indicated by the arrow, and the guide hole 4 becomes vertical, the slide cylinder/turf is activated. When the plunger 10 is moved forward by the slide cylinder 7, the rotor 3 moves in the axial direction, and the guide hole 4 is located at the unloading position 16, so that the guide hole 4 faces the unloading section 31.

Therefore, it falls onto the stud bolt A1 in the guide hole 4 due to its own weight, and is inserted into the supply nozzle 35 and ascends. At this time, supply nokubu 35 (/Ctrl:r-'r-
Since air is supplied from the pressure feed port 36, the air is conveyed through the conveying tube 37 by the air pressure of the AIU, and is supplied to a predetermined position.

In addition, if the stud pole AI carried into the guide hole 4 of the rotor 3 is inserted in the opposite direction, that is, with the tip A facing downward, when the rotor 3 rotates in the direction of arrow a, the proximal end A
2 faces the direction determining mechanism 19. Therefore, even when the stud bolt A1 in the guide hole 4 is pressed by the push rod 26, the base end A2 is not inserted into the mouth edge of the through hole 21 in contact with it, so that the detector 23 protrudes due to the restoring force of the spring 22. state, and sensor 24 is in the off state. Therefore, it is confirmed that the stud bolt AI has been carried in in the opposite direction, and a signal thereof is input to the rotary solenoid 6. Therefore, the rotor 3 rotates in the direction of arrow C, the guide hole 4 becomes inverted, and the internal stud bolt A1 faces upward.

In this state, when the slide cylinder 7 operates in the same manner as described above, the rotor 3 moves forward and is located at the unloading position I6, and the guide hole 4 faces the unloading section 31 and falls due to its own weight. Therefore, even if the stud bolt A is carried into the guide hole 4 of the rotor 3 in either direction, the direction is aligned and the stud bolt A is supplied.

Furthermore, if the item carried in from the carry-in section 17 has a stud bolt B1 shorter than the standard, the push rod 26 will be inserted deeply into the guide hole 4179 when determining the direction Z of the stud bolt B. . Therefore, since the protruding piece 28 faces the second sensor 30 and the second sensor 30 is turned on, the non-standard stud bolt B
, can be confirmed to be imported. At this time, when the output signal from the second sensor 3o is input to the slide cylinder 7, the rotor 3 moves forward and its guide hole 4 is located at the unloading position 16. Therefore, the guide hole 4 faces the discharge part 32, and the stud bolt B in the guide hole 4.

falls from the discharge section 32 due to its own weight and enters the collection tube 38.
will be collected by.

In this way, even if a stud bolt B with an unspecified length is brought in, it can be removed and only regular stud bolts AI can be supplied.

Incidentally, even when only the short stud bolt B is supplied and the long stud bolt A is excluded, the same method as described above can be used.

〔Effect of the invention〕

As explained above, according to the present invention, the length and direction of stud bolts that are different in length and are brought in in random directions can be determined, and only stud bolts of a specified length can be used! I decided to accept it, adjust the direction and supply it,
Since the length of the stud bolt does not have to be aligned in advance, special feeders and preparations are not required, and the structure is simple.

[Brief explanation of the drawing]

Figure 1 (4)) is a front view of the stud bolt, Figure 2+a
NolI++71.9L+! +I1. LMI]'17MT
hfiW-Infection;--PM&i'li'im No. 1, Broom Figures 3 to 5 show an embodiment of the present invention.
FIG. 3 is a longitudinal sectional front view, FIG. 4 is a longitudinal sectional side view along the line, and FIG. 5 is a view taken from the direction of arrow V in FIG. 4. 1... Cylinder, 3... Rotor, 4... Guide hole, 6... Rotary cylinder (drive 1 mechanism), 7...
Slide cylinder (drive mechanism), 15... Carrying-in position, 16... Carrying-out position, 17... Carrying-in part,
19... Direction discrimination mechanism, 20... Length detection mechanism, 3
1... Unloading section, 32... Discharging section.

Claims (1)

[Scope of Claim] An automatic stud bolt supply device that detects the lengths of stud bolts that are different in length and are brought in in random directions, and supplies the stud bolts in an aligned direction, comprising: a cylinder; A rotor that is freely and axially movable and can be switched between a loading position and an unloading position and has a guide hole in the radial direction, a stud bolt loading section provided at the loading position of the cylinder, and the cylinder A direction determining mechanism and a length detecting mechanism are provided point-symmetrically at the carry-in position of the cylinder, a stud bolt carry-out part and a stud bolt discharge part outside the specified length are provided in the carry-out position of the cylinder, and the rotor is rotated and An automatic stud bolt, characterized in that it is equipped with a drive mechanism that allows a stud bolt to be moved in the axial direction and inserted into a guide hole, and a drive mechanism that opposes the stud bolt'g/#IOλze rasigen, which is moved in the axial direction and is inserted into a guide hole. Feeding device.