JPH03111192A - Centering device - Google Patents

Abstract

PURPOSE:To increase the corresponsiveness to the various parts whose sizes differ and also to improve a working efficiency, by holding a part with its pinching between holding members by the rotation energizing of a driving arm and performing centering. CONSTITUTION:Driving arms 71, 73 and arms 81, 83 for parallel moving are respectively fitted up and down in the circumferential four directions surrounding a suction head 1, the lower ends of both arms are linked axially to the upper and lower parts of holding members 91, 93 respectively and moreover energizing means S1, S3 energizing the driving arms 71, 73 with their turnings are provided. By symmetrically turning the driving arms 71, 73 arranged at this opposed position with the energizing means S1, S3, a part 15 is held with its pinching by the holding members 91, 93 of the lower end thereof and the centering is performed.

Description

[Detailed Description of the Invention] <Industry> 2 Field of Application The present invention relates to a centering device that guides and holds components in a prescribed position in a mounting machine that mounts electronic components and mechanical components onto a printer 1 to a board, etc. be.

<Prior art> In conventional centering devices, for example, centering machines that mount electronic components onto printed circuit boards in a constant state, movement in the four directions of ±X and Y is performed using two drives. The holding part was configured to rotate around a fulcrum.

<Problems to be Solved by the Invention> In the conventional dual centering device, centering in the There have been problems in that the holding of the parts becomes unstable and the centering becomes inaccurate.

The present invention attempts to solve the above-mentioned conventional problems.

<Means for Solving the Problems> In the present invention, in each of the four directions surrounding the suction head,
A driving arm and a parallel moving arm are pivotally mounted below the arm, the lower ends of both arms are connected by pivots to the upper and lower parts of the holding member, respectively, and an arm that biases the drive arm to rotate is attached. The above-mentioned conventional problems were solved by providing a powering means.

The driving arms disposed at opposite positions are rotated symmetrically by the biasing means G, so that the holding member pivotally connected to the lower end holds the component under pressure, performs centering, and performs parallel The moving arm acts to cause the holding member to move in parallel.

<Example> Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 is a half-longitudinal front view showing the centering device of the present invention in a state before operation, and FIG. 2 is a half-longitudinal side view showing the centering device in an operating state.

Figure ii-, 51: A hollow suction head 1 is inserted into a cylindrical suction latch holder 2 so as to be movable up and down, and screws I and N are provided at predetermined positions on the outer periphery of the suction head bolder 2. 6 is integrally fixed, and a cylinder 3 is slidably mounted on the suction head holder 2 so as to cover the outer periphery of the piston 6. The adsorption l\Radruta-2
The inner and outer drive members 4.5 of the cylindrical shape are housed so that they can slide within a predetermined range, respectively! The tension spring Sl is stretched between the suction head and the lower end of the Lter 2.
, S2. S3. It is always urged downward by the tensile force of S4, and constitutes the urging means of the drive armoi, which will be described later. Also, near the lower end of the suction head holder 2, there are four drive arms 7t surrounding the suction head 1.
72, 73, 7.

and four parallel movement arms8. ．． 82.8. ．． 8. The lower ends of the drive arms 7, 77, 7...7 and the lower ends of the downward movement arms 81.8 and 83. are each holding member 9.
．． 92° 9, , 9, with pivots at the top and bottom.
1 i~1) are connected. Moreover, the drive arm 71
．． Between 72, 71, 7 + and the suction 71- holder 2, there is a person//compression spring S,'', s2', s:
]", S, ° are elastically inserted, and the drive arms 71 to 7
．． is always pushed toward the lower end Dj: in the opening direction (=f force).

Further, in the figure, the symbols R1, R2, R, 3, and R (represent rollers rotatably pivoted to the upper ends of the drive arms 7177□, 7..74, and the flange of the drive member 45 Part 4'', 5°'' is in contact with the lower surface.

In the figure, the reference numeral a''p represents the pivot axis of the connection point of each of the arms, and Pl to P represent the tension springs S, to S.

The tensioning pin 13 is a pin that is inserted through the elongated holes 1' and 5' provided in the drive member 4.5 to restrict the movement of the drive member 4 and 5, and is connected to the cylinder 3 as described above. This constitutes a release mechanism for the biasing means. Further, numerals 11 and 12 are compressed air supply ports for supplying compressed air into the cylinder 3, 14 is a gasket for maintaining airtightness, 10 is a cylinder head that airtightly closes the upper part of the cylinder 3, and 15 is a centering ring. and shows the parts being installed in place.

Next, the operation of the centering device of the present invention having the above structure will be explained.

First, the centering device is moved to the parts supply section (not shown) with the center link mechanism formed by connecting multiple arms in an open state, and the suction head is lowered to suck the necessary parts. After suctioning the component 15 to its lower end, the suction head 1 is rotated twice and the holding member 9. is moved as shown in FIG. ．． 93 to hold the centering part 15 between them. In this state, the centering device is moved to the mounting position of the printed circuit board or to the position for performing image processing. At this time, when compressed air is sent into the cylinder 3 from the compressed air supply section 12, Since the cylinder 6 is fixed to the suction head holder 2, the cylinder 3 moves downward along the suction head holder 2. Therefore, the drive member 4 held in the upper position by the pin 13 is
It moves downward I\ due to the tensile force of the tension springs S, , S,
Drive arm 71.7 located below the drive member 4. , the upper rollers R, , R3 are connected to the flange 4'' of the drive member 4.
Since the drive member 4 and the suction rod holder 2 are in contact with each other, they can overcome the compressive force of the compression springs s, ', s3° installed between the drive member 4 and the suction rad holder 2, and rotate around the pivots u and e. The holding members 91, 9., which are pivotally connected to the lower end thereof, press against the left and right end surfaces of the component 15. At the same time, as shown in FIG. 2, the other drive arms 7□, 7. Similarly to item 1, it is pushed by the driving member 5 that descends due to the tensile force of the tension spring S2. , the holding members 97, 9. provided at the lower ends thereof come into contact with the front and rear end surfaces of the component 15.Therefore, the component I5 faces the ?S holding members 9..9. and is pressed between the holding members 92, 9. The drive arm B to which the holding members 91 to 9 are attached will be held.
7. Since the opposed pairs are rotated symmetrically by the drive members 4.degree. 5, centering in both the X and 7 directions can be performed simultaneously.

At this time, the holding members 9+, 9z, 92.94 are parallel moving arms 8. ．． 83, 8□, 8. is moved almost in parallel.

After centering the parts in this way, when compressed air is fed into the cylinder 3 from the compressed air supply port ↑1, the piston 6, which is in airtight contact with the inner wall of the cylinder 3, is attracted to the rad holder. The suction head holder 2 is fixed to the suction head holder 2, and the upper part is closed by the cylinder head 10, so that it extends along the suction head holder 2. Due to this,
The driving members 4 and 5 are pulled upward against the tensile forces of the tension springs S1 to S4 by the pins 13 inserted through the long holes 4'' and 5'', and the driving members 4, 5g) fFJ part 4-5''' 11v moving armoire with upper rollers R1 to R in contact with the lower surface, 71 to 74 are compression springs S1'
The holding portion (491 and 9) is rotated in the downward expansion direction by the biasing force of 84'' to return it to its original state as shown in FIG.

After the above-mentioned centering device completes its operation, the mounting head 1 is lowered to mount the picked-up component 15 onto a printed circuit board (not shown) and image processing is performed. In this way, the centering device of the present invention operates and delays the above operations.

In this embodiment, the compression spring for return is elastically mounted between the drive arm and the suction rod holder to which the drive arm is pivotally mounted. The upper mounting point of the compression spring is placed near the pivot point of the arm.
If the distance between the compression spring and the pivot point of the drive arm to which it is attached is shifted significantly, a force will be applied in the direction in which the drive arm returns in the same manner as above, and the compression spring will move in parallel with the upper and lower drive arms. It may also be installed between the arm and the arm.

<Effects of the Invention> As described above, the centering device of the present invention can simultaneously center the front and back and left and right sides in one process even if the front and back and left and right dimensions of the parts are different. The degree of responsiveness will increase, and work efficiency will improve. Furthermore, since the holding member that comes into contact with the end surface of the component does not move in a circular motion as in the prior art, but moves in parallel, centering can be performed more accurately and the work precision can be improved, which is an excellent effect.

[Brief explanation of drawings]

The accompanying drawings show an embodiment of the centering device of the present invention, FIG. 1 is a half-longitudinal front view showing the centering mechanism in an open state, and FIG. 2 is a half-longitudinal side view showing the centering mechanism in a closed state. be. 1. Suction head 2...Adsorption/\Dopolder 3...-Cylinder 4 4', 5'/Elongated hole 6 Piston 7, ~74...Drive arm 81-84...Arno for parallel movement, 91-9. ...Holding member 11.12・Compressed air supply port 13・Pin 15 S1~S, tension spring S1°~S, ゛ compression spring, a ``I)・pivot 71'' R4-R4 driving member 5'' flange part parts/rollers

Claims (1)

[Claims] 1. A driving arm and a parallel movement arm are pivoted vertically in each of the four directions surrounding the suction head, and the lower ends of the arms arranged above and below are connected to the upper and lower parts of the holding member by pivots, respectively. At the same time, a compression spring is elastically mounted between the two arms or between the upper drive arm and the member to which the arm is pivotally connected, and further includes a biasing means for biasing the lower ends of the drive arms toward each other; and a release mechanism for retracting the biasing means so that the biasing means cannot be operated, and the drive arm is rotationally biased to hold the component under pressure between the holding members,
A centering device characterized in that centering is performed.