JPH0688224B2 - Parts suction device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component suction device used when a chip-shaped component is transferred by a vacuum suction nozzle.

2. Description of the Related Art In recent years, with the downsizing of equipment, electronic parts have also been made into chips,
Various parts have been transformed into chips. Examples are flat type ICs and chip type resistors. In response to this, various devices for transferring parts to a printed circuit board or the like have been proposed.

A conventional component suction device is disclosed in, for example, JP-A-59-79547.
It is shown in the publication. FIG. 8 is a conceptual diagram of this component suction device. Reference numeral 1 is an outer nozzle, 2 is an inner nozzle, 3 is a hollow pipe, and 3a is a sliding plug provided on the upper end of the hollow pipe.

Reference numeral 4 denotes a negative pressure introducing pipe connected to the hollow pipe 3 and connected to a vacuum generating device (not shown). Reference numeral 5 denotes a housing, which is composed of an upper housing 5b and a lower housing 5a. 6 is a spring, and the upper housing 5b
And the spring seat 7 are urged. Reference numeral 8 is a compressed air introducing pipe, which is communicated with a hollow portion 9 in the upper housing 5b.

Next, the operation of the conventional component suction device configured as described above will be described.

When adsorbing a relatively large component A ′, compressed air is not introduced into the compressed air introduction pipe 8, and the inner nozzle 2 is in the raised position. This is because the tip end surface 2a of the inner nozzle is located above the tip end surface 1a of the outer nozzle 1 so that the suction force is exerted on the outer pipe 1 side. As a result, the components are sucked. When adsorbing a relatively small part A, compressed air is introduced from the introduction pipe 8 to slide the sliding plug 3a. As a result, the inner nozzle 2 is lowered, and the tip surface 2a of the inner nozzle 2 is projected from the tip surface 1a of the outer nozzle 1 to adsorb components (see FIG. 9).

Problems to be Solved by the Invention However, in the above-mentioned configuration, the structure is complicated, and the reference position of the tip to be adsorbed changes in two steps, and the stroke in the vertical direction B changes. However, it has been difficult to attach to an automatic mounting device or the like that mounts components at high speed because the mechanism becomes complicated.

The present invention solves the above-mentioned conventional problems, and relates to a component suction device capable of suction-holding a component in a stable state by switching the suction area in response to a change in the shape of the component.

Means for Solving the Problems The present invention relates to a first suction pipe having a component suction surface at an end thereof, and a communication that is inserted into the first suction pipe at the same axis and communicates with the first suction pipe. A second suction pipe having a hole; a vacuum generator connected to the second suction pipe; a suction head drive means for simultaneously moving the first suction pipe and the second suction pipe in the axial direction; First suction pipe sliding means for sliding the first suction pipe relative to the suction pipe in the axial direction, and the second suction pipe provided with the relative movement of the first suction pipe and the second suction pipe. And an air circuit opening / closing means for opening / closing the communication hole with the sliding surface of the first suction pipe, wherein the component suction surface of the first suction pipe is the component suction surface of the second suction pipe. Is almost the same position as The second suction pipe is provided so as to be movable between a predetermined position on the side opposite to the side for picking up the component with respect to the component suction surface of the second suction pipe, and the inner surface of the first suction pipe and the second suction pipe. It is a component suction device in which an air circuit is formed between the outer surfaces.

Effect The present invention can adsorb components of different sizes at the same adsorbing position by changing the adsorbing area and also make the vertical stroke constant during adsorbing. Further, since the structure is simplified and the weight is easily reduced, it can be easily incorporated into a high-speed mounting machine or the like.

First Embodiment A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a schematic view of an apparatus according to the first embodiment of the present invention, and FIG. 1 shows a cross section of the suction head portion in FIG. 2 and 1, 10 is a vacuum generator, 11
Is an outer pipe which is a first adsorption pipe, 12 is an inner pipe which is a second adsorption pipe, 13 is a frame body of the first adsorption pipe, 14 is a frame body of the second adsorption pipe, 15 is a cylinder, and a connecting pipe
It is connected to a pressure source (not shown) by 10a. First
The suction pipe 11, the second suction pipe 12 slidably inserted in the same axis and the vacuum generator 10 are connected by a connecting pipe 10 ', respectively.
The first frame 13 for holding 11 holds the connecting portion 16 of the second suction pipe 12 and the connecting pipe 10 'in a movable manner, so that the axial direction B parallel to the suction direction (hereinafter referred to as the suction axis direction). ) Has a long hole. The air cylinder 15 is attached to the first frame 13 and holds the second suction pipe 12. The other end of the cylinder shaft is connected to the first frame body, and the distance between the second frame body 14 and the first frame body 13 in the suction axis direction B is set to the second frame body by driving the cylinder. Change based on.

Reference numeral 17 is a spacer that forms an air circuit between the inner surface of the first suction pipe and the outer surface of the second suction pipe.
The suction pipe and the second suction pipe can be slid in the suction axis direction B, and are configured to be slid against a rotation axis parallel to the suction axis direction B. 17b is a stopper at the lower limit of the spacer 17 and is attached to the second suction pipe 12. Further, the first suction pipe and the first frame body and the second suction pipe and the second frame body are detachably attached. Reference numeral 18a is a solenoid valve for switching means of the air circuit for opening and closing the air circuit. Reference numeral 19 denotes a head drive arm that holds the second frame body 14 rotatably.

The operation of the component suction device of the present embodiment configured as described above will be described below.

First, the adsorption in the case of a relatively large chip component represented by a flat IC or the like will be described. The cylinder attached to the second frame is driven to push down the first frame to the lower part, and as shown in FIG. 3, the second suction is performed up to the position of the component suction surface formed at the tip of the second suction pipe. Lower the tip of the pipe. After that, the head is lowered in the suction axis direction B by the head drive arm 19 connected to the second frame, and at this time, the solenoid valve 18a is located at a position close to the component.
Is open. The suction tip surfaces of the first and second suction pipes simultaneously contact the suction surfaces of the parts A ′,
The degree of vacuum in the suction pipes 11 and 12 is increased, and the component A'is suctioned. After that, the head drive arm 19 works to make a part A '.
While holding the component, the component A is moved upward by a predetermined amount, the component A is moved to a predetermined position, and then the air circuit is opened to the atmosphere to release the component A from suction and holding. Reference numeral 20 denotes a head rotation arm that rotates the suction head section between the component supply position and the transfer position.

Next, adsorption in the case of a relatively small chip-shaped component typified by a chip resistor or the like will be described.

In this case, the air cylinder 15 does not operate, and the first suction pipe 11 does not slide with respect to the second suction pipe 12. As a result, as shown in FIG. 4, the tip end portion of the second adsorption pipe projects from the first adsorption tip portion by a predetermined size. After that, the head drive arm connected to the second frame body 14
It descends in the suction axis direction B by 19, and the solenoid valve 18a is open at this point. In this state, the suction tip surface of the second suction pipe comes into contact with the suction surface of the component A, and the operation of the head drive arm and the solenoid valve causes the suction holding and release of the suction of the component A as described above. Be done.

Next, a more detailed description will be given with reference to FIG.

One or a plurality of holes F for forming an air circuit with the first suction pipe 11 are provided in the middle of the second suction pipe 12 capable of forming an air circuit by the connecting pipe 10 'with the vacuum generator. Next, the position where the hole F is provided will be described. When the moving amount of the first adsorption pipe is C, the upper end of the spacer at the upper limit position of the spacer 17 fixed to the first adsorption pipe 11
Let D be the length from 17a to hole F. At this time, the hole F is provided at a position where the relationship between the movement amount C and the length D is C> D.

As described above, according to the first embodiment, by moving the first suction pipe 11, it is possible to form an air circuit between the vacuum generator and the first suction pipe, and the first suction pipe 11 can be formed.
And the second suction pipe 12 move relative to each other, the first suction pipe
It has the effect that the air circuit to 11 can be opened and closed reliably and the stroke need not be changed.

Next, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 5 and FIG. 6 are sectional views of the main part of the tip of the suction head of the component suction device showing the second embodiment of the present invention.

Similar to the first embodiment, the second suction pipe 12 having the hole F is provided.
have a. Reference numeral 21 is a block fixed to the second suction pipe 12a, 22 is a first suction pipe, which is a first block movably inserted into the second suction pipe 12a of the structure 22a and an air path of 22b. The second block having a plurality of holes 23 is separably integrated with, for example, screws. A step with the sliding surface 22c is provided so as to form a cavity 22d when the first block 22a and the second block 22b are integrated. Reference numeral 24 denotes a spring that is urged by the block 21 and the first suction nozzle 22, and a stopper 25 fixed to the second suction nozzle limits the sliding of the first suction nozzle 22. An O-ring 26 is used to eliminate the gap between the first suction pipe 22 and the second suction pipe 12a. Reference numeral 27 denotes a pin provided on the first suction nozzle 22, which is provided so as to be able to contact the first suction nozzle driving lever 28. The second
The hole F provided in the suction nozzle 12a is in contact with the stopper 25 by the first suction nozzle 22 so that the second suction nozzle 12a
It is provided at the position where the air circuit with is formed.

The operation of the component suction device configured as described above will be described.

As shown in FIG. 5, the block 21 provided on the second suction nozzle 12a and the first suction nozzle 22 that is in contact with the stopper 25 are spring-loaded.
24 is pressing down. In this state, parts that require a relatively large suction area are sucked. At this time, the lever 28 is positioned so as not to contact the pin 27. As a result, the first suction nozzle 22 can form an air circuit through the hole F, and the suction area can be increased to suck the component.
Next, as shown in FIG. 6, the lever 28 is brought into contact with the pin 27, and the lever is driven in the E direction to raise the first suction nozzle 22 to raise the sliding surface 22c of the second block 22b. Closes hole F. As a result, the first suction nozzle 22
And the air circuit is closed, and the suction surface of the second suction nozzle is exposed.

In this state, small parts are sucked only by the second suction nozzle 12a. As described above, in the second embodiment, the suction head has a simple structure, can be made lighter, and the vertical stroke of the suction head can be made constant based on the tip of the second suction nozzle. Also, in the state of FIG. 6 (the state where the second suction pipe projects from the first suction pipe), the hollow portion
By providing the hole position at the top so as to match 22d, the first
By making the hole F open / close by the block 22a, the tip of the second suction nozzle is brought into contact with the concave surface 29 of the chip-shaped component having the concave, for example, as shown in FIGS. 7A and 7B.
In addition, it is possible to position and perform stable suction.

In this embodiment, the pin 27 is brought into contact with the lever 28, but the present invention is not limited to this, and similar effects can be obtained by other methods such as a structure in which the surfaces of cams are brought into contact. Needless to say.

Advantageous Effects of Invention The present invention includes a first suction pipe having a component suction surface at an end thereof, and a communication hole that is inserted into the first suction pipe at the same axis and communicates with the first suction pipe. Two suction pipes, a vacuum generator connected to the second suction pipe, suction head driving means for simultaneously moving the first suction pipe and the second suction pipe in the axial direction, and the suction pipe driving means for the second suction pipe. A first suction pipe sliding means that relatively slides the first suction pipe in the axial direction; and a communication hole provided in the second suction pipe with the relative movement of the first suction pipe and the second suction pipe. An air circuit opening / closing means for opening and closing the first suction pipe to the first suction pipe, the component suction surface of the first suction pipe being substantially the same as the component suction surface of the second suction pipe. Position of the second suction pipe An air gap is provided between the inner surface of the first suction pipe and the outer surface of the second suction pipe so as to be movable between a predetermined position on the side opposite to the side where the component is sucked with respect to the component suction surface. (1) An air circuit is formed between the inner surface of the large diameter nozzle and the outer surface of the small diameter nozzle, and the communication hole of the small diameter nozzle is opened and closed by the sliding surface of the large diameter nozzle. By making the air circuit communication to the large diameter nozzle side, the large diameter nozzle is set to the small diameter nozzle at the same position as the component suction surface of the small diameter nozzle and the component suction surface of the small diameter nozzle is used as a reference. By movably providing a predetermined position on the opposite side to the suction side, the component suction reference surface is always constant regardless of switching between the large and small suction areas. As a result, a constant distance can be maintained without changing the vertical stroke of the suction device. Further, this makes it possible to cope with large and small parts in the repeated work of the device for receiving parts, minimize the influence of damage to the parts due to contact with the suction nozzle, and perform high-speed work.

(2) In addition, suction nozzles having different suction areas are arranged coaxially, and the communication hole of the small diameter nozzle is opened and closed by the sliding surface of the large diameter nozzle with the relative movement of the large diameter nozzle and the small diameter nozzle. An air circuit is formed between the inner surface of the large diameter nozzle and the outer surface of the small diameter nozzle. As a result, the required area of the tip of the suction nozzle can be minimized, and when using the small diameter nozzle, the large diameter nozzle is retracted to a predetermined position that is opposite to the suction side, so it was placed close to each other. It is possible to work with high density by minimizing the interference with parts. Furthermore, the structure has been simplified,
It has a unique effect of reducing the weight.

[Brief description of drawings]

FIG. 1 is a sectional side view of a main part of a suction head portion of a component suction device according to a first embodiment of the present invention, FIG. 2 is a schematic front view of the component suction device, and FIGS. FIG. 5 and FIG. 6 are sectional views of the main part of the pipe tip, showing the second part of the present invention.
FIG. 7A and FIG. 7B are perspective views of a component having a concave surface and a suction nozzle tip, and FIG. 8 is a conventional component suction. FIG. 9 is a schematic front cross-sectional view of the apparatus, and FIG. 9 is a cross-sectional view of a main part of a suction head section. 11,22 …… First suction pipe, 12,12a …… Second suction pipe, 13,14 …… Frame, 15 …… Cylinder, 18a …… Solenoid valve, 23 …… Hole (air path), 27… … Pin, 28
...... Lever, A ... Relatively small part, A '... Relatively large part, F ... Hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-220017 (JP, A) Actual opening 57-145691 (JP, U) Actual opening Sho-59-74082 (JP, U)

Claims (1)

[Claims] 1. A first suction pipe having a component suction surface at an end thereof, and a second suction pipe having a communication hole penetrating into the first suction pipe at the same axis and communicating with the first suction pipe. A pipe, a vacuum generator connected to the second suction pipe, a suction head driving means for simultaneously moving the first suction pipe and the second suction pipe in the axial direction, and the first suction pipe with respect to the second suction pipe. A first suction pipe sliding means for sliding the suction pipe relatively in the axial direction, and a first communication hole provided in the second suction pipe as the first suction pipe and the second suction pipe move relative to each other. And an air circuit opening / closing means for opening and closing the first suction pipe on the sliding surface of the suction pipe, wherein the component suction surface of the first suction pipe is substantially the same as the component suction surface of the second suction pipe. , Second suction pipe parts suction Is provided so as to be movable between a predetermined position on the side opposite to the side where the component is sucked, and an air circuit is formed between the inner surface of the first suction pipe and the outer surface of the second suction pipe. The component suction device characterized in that