JP2541380Y2 - Electronic component chuck mechanism - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a chuck mechanism having a pair of holding pieces for receiving and holding an electronic component as a work.

2. Description of the Related Art Conventionally, as a chuck mechanism for an electronic component having such a holding piece, a chuck mechanism for an electronic component insertion mechanism for inserting an electronic component into a printed circuit board is known. In the electronic component insertion mechanism, a chuck mechanism is mounted by a mechanism for connecting a drive cylinder, which is capable of extending and retracting a stroke, and a support frame of the holding piece via a link, a lever, etc., in order to regulate the vertical position of the holding piece. (Japanese Patent Publication No. 54-34462
Nos. 55-16559, 55-20399, 58-9595).

In the chuck mechanism described above, the stroke expansion and contraction movement of the drive cylinder is transmitted to the support frame of the holding piece via the link, the lever, and the like, so that the lifting position of the holding piece can be accurately regulated. . In particular, it is preferable because it can be configured to reliably prevent the holding piece from coming into contact with the surface of the printed circuit board or the like.

On the other hand, since the drive cylinder and the support frame of the holding piece are connected via links and levers, the mechanism becomes extremely complicated and the whole mechanism becomes large, so it can be used in narrow places or fixed places. It is not suitable for multiple installations. Further, when it is desired to adjust the opening allowance of the holding piece in accordance with the size of the electronic component, it is necessary to change the length of the link or the lever, so that it is time-consuming to change the assembly.

According to the present invention, an electronic device is provided in which the holding piece is directly provided at the rod end of the driving cylinder to make the whole compact, and the driving cylinder has an escape mechanism so as to be able to buffer even if a load is applied to the holding piece. An object of the present invention is to provide a chuck mechanism for parts.

It is another object of the present invention to provide an improved electronic component chuck mechanism in which the opening of the holding piece can be easily adjusted according to the size of the electronic component serving as a workpiece.

Means for Solving the Problems In the electronic component chuck mechanism according to the present invention, a drive cylinder is mounted on the body frame with the rod end of the cylinder rod facing downward, and a piston chamber at a desired interval is provided inside the drive cylinder. While the cylinder rod is inserted and held, a return spring compressed by the stroke extension movement of the cylinder rod is fitted on the axis of the cylinder rod and provided in the cylinder, and the lower surface of the cylinder through which the cylinder rod of the drive cylinder enters and exits. A pair of holding pieces for holding the electronic components are pivotally attached to the cylinder side plates projecting downward from the lower surface of the cylinder with support shafts at intervals.
Each holding piece is configured to engage with a long hole opened on the side surface thereof and a support shaft protruding from the cylinder rod so as to open and close the holding piece.

In this chuck mechanism, an air cylinder is provided as the above-described drive cylinder, and the air supply nozzle can be screwed onto the cylinder upper surface with the nozzle tip facing the piston chamber of the drive cylinder and screwed back so that it can be screwed back. Further, the drive cylinder can be equipped by being attached to the body frame so as to be rotatable about the cylinder axis.

In this electronic component chucking mechanism, a load may be applied when the lower end of the body frame descends or the cylinder rod is extended in stroke, and the pair of holding pieces abut on the lower surface of the printed circuit board. However, since the cylinder rod which supports the holding piece retreats into the cylinder at the space between the piston chamber and the gap existing between the holding piece and the lower surface of the cylinder, the holding piece itself and the holding mechanism are released by the escape mechanism of the drive cylinder. Damage to electronic components, printed circuit boards, and the like can be prevented. At this time, even when the operating pressure is being supplied to the piston chamber in order to extend the stroke of the cylinder rod of the driving cylinder, there is a space between the piston chamber and the gap between the holding piece and the lower surface of the cylinder, as described above. Since the return spring is being compressed, the cylinder rod can be retracted into the cylinder by the return spring against the operating pressure. For this reason, the cylinder rod exerts a damper function, and the load caused by the holding piece abutting on the plate surface of the printed circuit board can be buffered.

In this electronic component chuck mechanism, an air supply nozzle that supplies pressure air with the nozzle tip facing a piston chamber that supplies the operating pressure of the cylinder rod is screwed into the upper surface of the cylinder and screwed back so that it can be unscrewed. Therefore, by adjusting the screwing and unscrewing amount of the air supply nozzle, the distance between the tip of the nozzle and the upper end surface of the cylinder rod can be set appropriately. Can be adjusted.

Embodiment The following is a description with reference to the accompanying drawings.

The chuck mechanism for electronic components shown in the drawings is configured to be small in size as a whole suitable for using ultra-small chip components as workpieces. Can be equipped as etc.

As shown in FIGS. 1 and 2, the chuck mechanism is assembled on the basis of the body frames 1 of the various devices described above. The body frame 1 is equipped to be moved in the X and Y directions and up and down by driving means such as a driving cylinder and a hole screw (not shown). A drive cylinder 2 is vertically attached to the body frame 1 with the rod end of the cylinder rod 20 facing downward. As the drive cylinder 2, a cylinder body 20 and a cylinder head 2b which are assembled by screwing with a screw portion 2c are used, and the cylinder rod 20 inserted therein is a shaft upper end side.
The lower shaft portion of 20a is fitted in the open end of the lower end side 20b formed in a cylindrical shape with a bottom, and is linearly connected by being axially mounted with a pin 20c. Two sliding flanges 21a, 2 are spaced apart from each other on the shaft upper end 20a of the cylinder rod 20.
The piston 21 is formed by providing the Y packing 21c in the space between the sliding flanges 21a and 21b while providing the 1b. Partitioned by this piston 21, the cylinder body 2a
Inside, a piston chamber 22 of a desired space for supplying an operating pressure by air or the like for extending the stroke of the cylinder rod 20 is maintained as described later. Further, the respective spring ends are abutted between the lower contact flange 21b of the piston 21 and the inner end surface of the cylinder head 2b, and the return spring 3 of the cylinder rod 20 composed of a compression spring is positioned on the axis of the cylinder rod 20. Is provided inside the drive cylinder 2 by being inserted and arranged. Further, the drive cylinder 2 is provided with a pair of left and right holding pieces 4 and 5 located at a shaft lower end side 20b of the cylinder rod 20 projecting outward from the cylinder head 2b. Each of the holding pieces 4 and 5 has a plate-like portion 4 that is supported by the cylinder head 2b and the cylinder rod 20 as described later.
0 and 50, and holding parts 41 and 51 of the electronic parts protruded so as to be opposed to each other at the lower ends of the plate-shaped parts 40 and 50. Each clamping pieces 4 and 5 are mounted spaced apart W ₁ between the upper edge of the cylinder bottom surface 23 and the plate-like portion 40 and 50 a cylinder rod 20 of the cylinder head 2b in and out.
As shown in FIG. 3, the holding pieces 4 and 5 are fixed to the cylinder side plates 24a and 24b projecting downward from the cylinder lower surface 23 of the cylinder head 2b by supporting screws 6a and 6b fixed with set screws 25a and 25b.
It is pivoted at. In addition, the holding pieces 4 and 5 are also supported by the middle plate portions 26a and 26b which are formed to protrude laterally from the shaft lower end 20b of the cylinder rod 20, and are inserted and fixed in the respective middle plate portions 26a and 26b. By inserting the support shafts 7a, 7b into the elongated holes 42, 52 provided in the plate-like portions 40, 50 of the holding pieces 4, 5, the holding portions 41, 51 on the lower end side with the support shafts 6a, 6b as fulcrums. It is installed so that it can be opened and closed by movements that approach and separate from each other.

An air cylinder can be used as the drive cylinder 2 described above, and an air supply nozzle 8 for supplying + air to the piston chamber 22 can be connected to the upper surface of the cylinder body 20a. The air supply nozzle 8 has a nozzle tip 8a facing the piston chamber 22 and is screwed into the cylinder upper surface 27 with a screw portion 8b, and screwed and mounted so that the screw can be returned.
It is equipped to be able to adjust the stroke extension distance of the cylinder rod 20 at spaced intervals W ₂ between the axial upper end surface of the nozzle tip 8a and the cylinder rod 20, as shown in FIG. The drive cylinder 2 has a cylinder body 2a fitted in a sliding contact cylinder 10 which is fitted and fixed in the body frame 1 and a cylinder body 2a.
Is attached to the body frame 1 by keying with the collars 11a and 11b, and the gear 28 provided on the outer periphery of the cylinder body 2a is meshed with a gear (not shown) so as to be rotatable about the cylinder axis. . The driving cylinder 2 can be provided with a holding pin 9 for electronic parts, which is located at the center of the holding pieces 4 and 5. The holding pin 9 is formed through a through hole provided on the bottom surface of the lower shaft side 20b through the cylinder rod 20.
The extension 9c is inserted between the head 9b that slides within the diameter of the lower end 20b of the rod shaft and the lower shaft portion of the upper end 20a of the rod shaft. It is mounted so that it can be displaced by elastic pressure.

In the electronic component chuck mechanism configured as described above, as shown in FIG. 1, as the body frame 1 moves down, the pressing pins 9 are mounted on the board surface of the printed circuit board or on a pallet or the like. Hold down. At this time, even if the body frame 1 moves down with an unnecessarily large stroke,
Is deflected upward by compressing the extension spring 9c, so that it is possible to avoid pressing the electronic component E with a strong pressure that would damage the electronic component E. When + air is supplied from the air supply nozzle 8 to the piston chamber 22 in this state, the cylinder rod 20
4 and 5, the support shafts 7a and 7b projecting from the middle plates 26a and 26b of the cylinder rod 20 as shown in FIGS.
The support shaft supported by the cylinder side plates 24a, 24b of the cylinder head 20b by pressing the holding pieces 4, 5 in the long holes 42, 52 of 0, 50.
It rotates eccentrically around 6a and 6b. With the rotation, the holding pieces 4 and 5 can hold the electronic component E at the holding portions 41 and 51. At this time, the holding pieces 4, 4 due to the excessive lowering of the body frame 1 or the excessive stroke extension of the cylinder rod 20 described above.
Even if the holding portions 41 and 51 of 5 come into contact with the board surface of the printed circuit board or the pallet, the return spring 3 compressed by the extension of the stroke of the cylinder rod 20 expands and the holding member 41 and the lower surface of the cylinder 23 The upper end surface of the cylinder rod 20 and the air nozzle 9 in the upper end edges of
Due to the existence of the intervals W ₁ and W ₂ between the nozzle tip 9a and the nozzle tip 9a, the cylinder rod 20 exhibits a damper function of escaping upward and buffering the load. Therefore, there is no possibility of damaging the holding pieces 4 and 5 or the electronic component E or the like.

After the clamping of the electronic components, when the above-described chuck mechanism is provided in the repair / repair device for the electronic components, when the drive cylinder 2 is rotated about the cylinder axis by the gear 28,
Defective components mounted on a printed circuit board can be stripped off. Further, when the electronic component is mounted on a mounting machine for the electronic component, the electronic component received from a pallet or the like can be turned and taken out. After the receiving and holding, the electronic component can be carried to another predetermined position in the XY direction by moving the body frame 1 upward. In this carrying position, when the air supply from the air supply nozzle 8 is stopped, the stroke of the cylinder rod 20 is reduced by the return spring 3, so that the holding pieces 4, 5 release the electronic components.

In this chuck mechanism, the opening margin between the holding and release of the electronic component by the holding pieces 4 and 5 can be appropriately changed according to the size of the electronic component. Its open margin is an air supply nozzle 8 returns screwed or threaded into the cylinder main body 2a of the driving cylinder 2 with a screw portion 8b, easily by setting the interval W ₂ between the axial upper end surface of the nozzle tip 8a and the cylinder rod 20 Can be adjusted.

As described above, according to the electronic component chucking mechanism of the present invention, the pair of holding pieces are directly attached to the rod tip side of the drive cylinder so as to be openable and closable, so that the entire mechanism can be simplified. In addition, since the cylinder rod of the drive cylinder is assembled so that the cylinder rod can escape into the cylinder even when a load is applied to the holding piece, it is possible to prevent the holding piece itself and electronic components from being damaged.

The opening of the holding piece is adjusted by screwing an air supply nozzle, which supplies air pressure into the piston chamber of the drive cylinder, into the drive cylinder and screwing it back.
By adjusting the distance between the tip of the nozzle and the upper end of the shaft of the cylinder rod, it can be easily set according to the size of the electronic component.

Accordingly, this chuck mechanism is suitable for being mounted in a narrow place by arranging a plurality of the chuck mechanisms in addition to being able to configure the whole mechanism to be simple and small as described above, and also to be able to set a small opening margin of the holding pieces. In addition to the above operation, by adding a rotation mechanism about the cylinder axis to the drive cylinder, it can be configured to be applicable to a wide range of applications.

[Brief description of the drawings]

1 is a front sectional view showing a chuck mechanism of an electronic component according to the present invention in a contracted state, FIG. 2 is a side sectional view of the chuck mechanism, and FIG. 3 is a plan view showing the chuck mechanism from the cylinder head side. 4 and 5 are explanatory views of the operation of the chuck mechanism when the cylinder is extended. 1: Airframe, 2: Drive cylinder, 20: Cylinder rod, 22: Piston chamber, 23: Cylinder lower surface, 24a, 24b: Cylinder side plate, 27: Cylinder upper surface, 3: Return spring, 4, 5: One pair of holding pieces , 41, 51: clamping pieces lower end of, 6a, 6b, 7a, 7b: a support shaft, 8: air supply nozzle, 8a: a nozzle tip, W _1: distance between the cylinder bottom surface and clamping pieces.

Claims (3)

(57) [Scope of request for utility model registration] 1. A drive cylinder (2) is mounted on a body frame (1) with the rod end of a cylinder rod (20) facing downward, and a piston chamber (22) at a desired interval is provided inside the drive cylinder (2). While the cylinder rod (20) is inserted through the cylinder rod (20), and the return spring (3) compressed by the stroke extension movement of the cylinder rod (20) is moved to the cylinder rod (2).
0) is mounted in the cylinder by inserting it on the axis of the electronic component ( ₂ ) with a gap (W ₁ ) between the cylinder bottom (23) where the cylinder rod (20) of the drive cylinder (2) enters and exits. E) Cylinder side plates (24a, 24b) projecting a pair of holding pieces (4, 5) holding the lower part (23) of the cylinder downward.
Are pivoted on the support shafts (6a, 6b), and the holding pieces (4,
The long holes (42, 52) opened on the side of (5) and the supporting shafts (7a, 7b) protruding from the cylinder rod (20) are engaged so that the holding pieces (4, 5) can be opened and closed. An electronic component chucking mechanism characterized in that: 2. An air supply nozzle (8) having a nozzle tip (8a) facing a piston chamber (22) of a drive cylinder (2).
2. A chuck mechanism for an electronic component according to claim 1, wherein said screw is screwed into said cylinder upper surface and screwed back. 3. A chuck mechanism for electronic parts according to claim 1, wherein a drive cylinder (2) rotatable about a cylinder axis is provided on the body frame (1).