KR20000022881A - Surface-mounting apparatus - Google Patents

Abstract

PURPOSE: A surface establishing device is provided to enhance an establishing efficiency by improving a working ratio of each absorption head. CONSTITUTION: A surface establishing device comprises a head unit and a plurality of absorption head. The plurality of absorption head(20a-20f) are mounted on the head unit(5). The absorption heads rotates, ascends or descends for the head unit to absorb and transfer each component. The surface establishing device comprises a controller for controlling a driving of the absorption heads. Each absorption head is mounted on the head unit to perform an offset in a row line or above and below.

Description

Surface Mounter {SURFACE-MOUNTING APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface mounter having a plurality of suction heads in the head unit.

Conventionally, a surface in which a suction head is mounted on a movable head unit, an electronic component is sucked from a tape feeder or the like of a component supply unit, transferred to a positioned printed board, and installed at a predetermined position on the printed board. An installation device (hereinafter simply referred to as an installation device) is generally known. In recent years, an installation device in which a plurality of adsorption heads are mounted side by side in a head unit, thereby allowing a plurality of components to be adsorbed at the same time to improve installation efficiency. Is also proposed.

In the above installation device, in general, the suction head is rotated while the head unit moves on the printed board after the suction of the parts, and the parts are set at a predetermined mounting angle (direction). When the head unit reaches above the mounting position, the suction head is reached. Lowering the parts to install the parts.

By the way, in the installation device provided with a plurality of adsorption heads, adjacent parts may interfere when the parts are set at the mounting angle after the parts are mounted, depending on the shape of the parts. Therefore, in such a case, the installation operation is performed without predicting the possibility of interference and without using, for example, adsorption heads on both sides of the adsorption head for adsorbing components. In addition, the part adsorption itself may not be performed by the adsorbing heads adjacent to each other from the relationship between the distance between the adsorption heads and the size of the parts. In this case, the adsorption heads on both sides of the adsorption heads for adsorbing the parts are used. The operation is performed.

However, in this case, the function of the installation device equipped with the plurality of adsorption heads is greatly reduced, and the installation efficiency cannot be sufficiently improved. Therefore, this point needs to be improved.

It is also conceivable to set the distance between the suction heads sufficiently wide so that the parts do not interfere with each other during rotation, but this is not preferable because the head unit is enlarged and the inertia during the movement of the head unit is largely affected.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a surface mounter capable of improving installation efficiency by improving the operation rate of each suction head in a surface mounter having a plurality of adsorption heads mounted on a head unit. .

1 is a schematic plan view showing an example of a surface mounter to which the present invention is applied;

2 is a schematic front view;

3 is a front view showing the configuration of the head unit;

Fig. 4 is a schematic front view of the head unit showing a state after adjusting the mounting angles of the components adsorbed by the respective adsorption heads;

5 is a flowchart showing an example of an installation operation;

Fig. 6 is a view seen from the direction A in Fig. 3 illustrating the operation of each adsorption head when inspecting the adsorption state of parts by a laser unit;

7 is a schematic diagram showing a relationship between an adsorption head and an adsorption part;

8 is a flowchart for explaining an example of the suction operation of the component when the lifting stroke of the suction head is suppressed.

<Description of the symbols for the main parts of the drawings>

5: Head unit 20a ~ 20f: Suction head

21: nozzle 24: Z-axis servo motor

26: R-axis servo motor 30: laser unit

In order to achieve the above object, the present invention provides a surface mounting apparatus in which a head unit is equipped with a plurality of adsorption heads capable of rotating and elevating parts, and is provided with control means for controlling the driving of these adsorption heads. At least one of the adsorption heads is offset upward and downward with respect to the adsorption heads adjacent thereto (claim 1).

According to this apparatus, even if components are adsorbed by adjacent suction heads, the components do not interfere with each other because their height positions are different vertically. For this reason, when the components are adsorbed and held at the same height position by adjacent suction heads, the components may interfere with each other, or the components may not interfere with each other when the components are adsorbed, but may interfere with each other during the adjustment of the mounting angle performed prior to installation. It becomes possible to adsorb | suck and install a component by an adjacent suction head.

In addition, the present invention is a surface mounting apparatus in which a plurality of adsorption heads for adsorption of components capable of rotating and lifting parts are mounted side by side in the head unit, and after adsorption of components, at least one adsorption head is offset up and down with respect to the adsorption head adjacent thereto. And control means for controlling the driving of the suction head as much as possible (claim 2).

According to this apparatus, components adsorbed by adjacent suction heads are held at different height positions. Therefore, when the components are adsorbed and held at the same height position by the adsorbing heads adjacent to each other, the parts can be adsorbed and installed by the adsorbing heads adjacent to each other.

According to the above-described configuration, there is provided an optical detecting means for inspecting the adsorption state of the component based on the projection detection of the component adsorbed on the adsorption head, having a light irradiating portion and a light receiving portion disposed opposite each other with a space for lifting the suction head. Mounting on the head unit is performed. In this case, the optical detecting means has an irradiation part and a light receiving part which extend along the arrangement direction of the adsorption head to detect the projection of the parts adsorbed on the respective adsorption heads, and the control means are parts adsorbed on each adsorption head during the installation operation. It is to be configured to control the driving of each adsorption head so as to arrange each part between the irradiation part and the light receiving part while maintaining the up-down position relationship between the adsorption parts.

According to this apparatus, the adsorption state of the components adsorbed by each adsorption head can be inspected efficiently by a common optical detection means. Particularly, the head unit and the driving of each suction head are driven by the control means so as to install the parts that have been checked the adsorption state in parallel with the adsorption state of the components sequentially from the lower side components adsorbed on the respective adsorption heads. If control is made (claim 4), the adsorption parts can be inspected and the parts can be efficiently installed.

Embodiment

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

1 and 2 show an example of a surface mounter according to the present invention. As shown in the figure, a conveyor 2 for transporting a printed board is disposed on a base 1 of a surface mounting machine (hereinafter, abbreviated as mounting device), and the printed board 3 is transported on the conveyor 2. It stops at the predetermined mounting position.

The parts supply part 4 is provided in the front-back side of the said conveyor 2, respectively. Each component supply part 4 is provided with a tape feeder 4a of several rows, respectively, and each tape feeder 4 has small-piece parts, such as an IC, a transistor, and a capacitor, at predetermined intervals, respectively. At the same time, the tape is stored and held in the reel, and at the same time, the tape release end is provided with a ratchet transfer mechanism, and the parts are picked up by the head unit 5 described later. The tape is intended to be released intermittently as it is picked up.

In addition, above the base 1, a component mounting head unit 5 is provided, and the head unit 5 is arranged in the X-axis direction (direction of the conveyor 2) and the Y-axis direction (X-axis on a horizontal plane). Moving in a direction perpendicular to each other).

That is, on the base 1, a pair of fixed rails 7 extending in the Y-axis direction and a ball screw shaft 8 which are rotationally driven by a Y-axis servo motor 9 And a head unit support member 11 is disposed on the fixed rail 7, and a nut part 12 provided on the support member 11 is screwed to the ball screw shaft 8. have. In addition, the support member 11 is provided with a guide member 13 extending in the X-axis direction and a ball screw shaft 14 driven by the X-axis servo motor 15. The guide member 13 The head unit 5 is movable so that the nut part (not shown) provided in the head unit 5 is screwed to the ball screw shaft 14. The ball screw shaft 8 rotates by the operation of the Y-axis servo motor 9 so that the support member 11 moves in the Y-axis direction, and at the same time, the ball-axis is operated by the operation of the X-axis servo motor 15. The screw shaft 14 rotates so that the head unit 5 moves in the X-axis direction with respect to the support member 11.

The head unit 5 is provided with a plurality of adsorption heads for component adsorption. In this embodiment, six adsorption heads 20a to 20f are arranged side by side in the X-axis direction as shown in FIG. .

As shown in the figure, these suction heads 20a to 20f are alternately offset up and down by a predetermined dimension between adjacent suction heads, and can be lifted and rotated with respect to the frame of the head unit 5, respectively. Although not shown in detail, it is driven by the elevating driving means using the Z-axis servo motor 24 as the driving source and the rotating driving means using the R-axis servo motor 26 as the driving source.

Parts adsorption nozzles 21 are provided at the lower ends of the adsorption heads 20a to 20f, and at the time of adsorption of parts, negative pressure is supplied to the tip of the nozzle 21 from a negative pressure supply means (not shown). The component is adsorbed by the suction force by the negative pressure.

The head unit 5 is further provided with a laser unit 30 (optical detection means) for inspecting the adsorption state of the parts based on the detection of the projection of the parts adsorbed by the nozzles 21 of the adsorption heads 20a to 20f. It is.

The laser unit 30 is arranged to face each other in the Y-axis direction with the space S passing therebetween when the nozzles 21 of the respective heads 20a to 20f move up and down as shown in Fig. 6A. It has a generation part 31a (irradiation part) and a detector 31b (light reception part), and is comprised so that the projection of a part may be detected by irradiating the parallel light 32 to the adsorbed part. Both the laser generator 31a and the detector 31b are elongated and elongated along the arrangement direction of the adsorption heads 20a to 20f, so that the components adsorbed by the adsorption heads 20a to 20f are common. It is comprised so that it may test | inspect by the laser unit 30 of this.

The above installation apparatus is provided with a controller (control means) having a computer as a component, although not shown in the drawings. Each of the servo motors 9 and 15 and the suction heads 20a to 20f for driving the head unit 5 are provided. Each of the servo motors 24 and 26 for driving is connected to this controller. At the time of installation, the installation operation of the parts as described later is to be performed, and the head unit 5 and the like are collectively controlled by this controller in accordance with a program already stored.

Next, the installation operation of the component by the above-described installation machine will be described.

In the installation operation, first, the head unit 5 moves above the component supply section 4, and the components are drawn out by the suction heads 20a to 20f. Specifically, the predetermined adsorption heads 20a to 20f which should adsorb the components descend to adsorb the components and ascend in the state where the components are adsorbed, thereby picking up the components from the component supply unit 4. At this time, if possible, the parts are taken out simultaneously by the plurality of suction heads 20a to 20f.

If the components are adsorbed by all the adsorption heads 20a to 20f, the head unit 5 is moved onto the printed board 3 and at the same time, the adsorption heads 20a to 20f by the laser unit 30 during this movement. ), The adsorption state of the parts is inspected, and each adsorption part is adjusted to a predetermined mounting angle (direction) in the R-axis direction. At this time, in the installation device, as the adsorbed heads 20a to 20f are offset up and down as described above, the adsorbed heads 20a to 20f are adjusted for adjusting the mounting angle because the adsorbed parts are held at different height positions. Is rotated and driven, the adjacent adsorption parts do not interfere at all.

When the head unit 5 reaches the printed board 3, each of the suction heads 20a to 20f is driven up and down while the head unit 5 is sequentially moved to a predetermined component mounting position, whereby the printed board 3 Each part is mounted on).

As described above, even when the adsorption heads 20a to 20f are rotationally driven for adjusting the mounting angle during the movement of the head unit 5, the adsorption heads 20a to 20f do not interfere with adjacent adsorption parts as described above. ) Can improve the operation rate. In other words, even if the components are held on the same plane (the same height position) in the related art, the components that interfere with each other at the time of mounting angle adjustment can be mounted by adsorption by adjacent suction heads 20a to 20f. For this reason, components can always be installed using all the adsorption heads 20a-20f, and the operation rate of each adsorption head 20a-20f can be improved by this.

Therefore, in order to avoid the interference between the components as described above, for example, in the conventional apparatus which performed the installation operation without using the adsorption heads on both sides of the adsorption head that adsorbs the components, for example, by adsorbing the components every other head. In comparison, the installation efficiency can be effectively improved.

However, in the configuration of the head unit 5 as described above, after adjusting the mounting angle of the parts, as shown in Fig. 4, the adsorption parts by the adjacent adsorption heads 20a to 20f are overlapped up and down. In this case, if the mounting of the components Ch is carried out in such a case, there is a fear that the components interfere with each other and drop out. For example, a component Ch positioned on the upper side (for example, a component Ch adsorbed on the adsorption head 20a) and a component Ch positioned on the lower side (for example, a component adsorbed on the adsorption head 20b. If it is mounted before (Ch)], the components (Ch) may interfere with each other and drop off when the suction head is lifted. Similarly, there is a problem of interference of the component Ch even when the component Ch is adsorbed. For this reason, in the installation device, it is necessary to control the installation operation so as to avoid interference between such parts when the components Ch are sucked and mounted.

Fig. 5 is a flowchart showing an example of such an installation operation, which will be described below.

In this flow, first, the head unit 5 is moved to the initial component adsorption position (n = 1) of the component supply section 4, and the components are adsorbed (steps S1 to S3). The adsorption of the parts is carried out by the adsorption of the adsorption heads 20a, 20c, and 20e (hereinafter referred to as the upper heads 20a, 20c, and 20e) that hold the components from above in the adsorption heads 20a to 20f. And adsorption of the adsorption heads 20b, 20d, and 20f (hereinafter referred to as the lower heads 20b, 20d, and 20f) that hold the component below. At this time, if possible, the components are simultaneously sucked by the heads 20a, 20c, and 20e or the heads 20b, 20d, and 20f.

When the adsorption of the parts at the adsorption position is completed, it is judged whether there are other parts to be adsorbed (step S4), and when there are other parts to be adsorbed, the head unit 5 is replaced by the parts supply unit 4. After moving to the next component adsorption position (n + 1) (step S11), component adsorption is performed in the same manner.

On the other hand, if it is determined in step S4 that there are no other parts to be adsorbed, that is, when the adsorption of all the parts is completed, the parts adsorbed by the lower adsorption heads 20b, 20d, and 20f are removed from the laser unit 30. ), And the suction state of the part is inspected (step S5). In detail, the lower adsorption heads 20b, 20d, and 20f are elevated, and each component is disposed at a height position that blocks parallel light rays 32 as shown in Fig. 6A, and the adsorption heads 20b are in this state. The adsorption state of each component is examined by detecting the projection while rotating the components according to the rotation of 20d and 20f. At this time, as the laser generating part 31a and the detecting part 31b are elongated and elongated along the arrangement direction of the adsorption heads 20a to 20f, the components adsorbed by the adsorption heads 20b, 20d, and 20f respectively. The projection of the projection of is made simultaneously, and the adsorption state of these parts is simultaneously examined.

In addition, while inspecting the adsorption state of each component adsorbed by the lower adsorption heads 20b, 20d, and 20f, the components adsorbed by the upper heads 20a, 20c, and 20e are, for example, the head 20a. By setting the positions 20c and 20e to the rising end positions, the parts are held above the inspection position of the laser unit 30.

Next, all the suction heads 20a to 20f are lowered integrally, and each component adsorbed by the upper heads 20a, 20c, and 20e as shown in Fig. 6B is inspected by the laser unit 30. In the same manner as described above, inspection of the adsorption state of the components is started based on the detection of the projection while rotating the components (step S6).

If the inspection of the components adsorbed by the upper heads 20a, 20c, and 20e has started, the flow advances to step S7 to check whether there is an installation component, that is, adsorb the components to be mounted (installed) in the head unit 5, It is judged whether or not there is (step S7). If there is an installation part, it is further determined whether there is an adsorption part by the lower heads 20b, 20d, and 20f, and if it is determined that there is an adsorption part, the head unit 5 is moved to a target position. The components adsorbed to the lower heads 20b, 20d, and 20f are provided on the printed board 3 in predetermined order (steps S8, S12). At this time, the parts are installed in consideration of the adsorption error required according to the adsorption state of the parts examined in step S5.

On the other hand, in step S8, when it is judged that there is no adsorption part by the lower heads 20b, 20d, and 20f, that is, installation of all parts that have been adsorbed and held by the lower adsorption heads 20b, 20d, and 20f. If is completed, then it is judged whether or not the inspection of the components held by the upper heads 20a, 20c, and 20e has been completed (step S9). Here, if it is judged that the inspection is completed, the components adsorbed to the upper heads 20a, 20c, and 20e are installed in the printed board 3 in a predetermined order (step S10). Even in this case, the parts are installed in consideration of the adsorption error required according to the adsorption state of the parts examined in step S6.

If there are no parts to be finally installed (if NO is determined in step S7), the flow returns to step S1 to end this flowchart.

According to this installation operation, it is possible to reliably prevent the interference between the components (interference in the up and down direction) during the adsorption of components by the respective adsorption heads 20a to 20f while adopting the configuration of the head unit 5 as described above. Can be. In addition, in this installation operation, the components of the lower suction heads 20b, 20d, and 20f which have already been examined have been inspected while the adsorption state of the components adsorbed and held by the upper heads 20a, 20c, and 20e is examined. There is also a feature that parts can be efficiently installed because of mounting.

By the way, the mounting apparatus of the said embodiment is an example of the surface mounting apparatus which concerns on this invention, and the specific structure can be changed suitably within the range which does not deviate from the summary of this invention.

For example, in the above embodiment, each of the adsorption heads 20a to 20f is offset up and down alternately in the X-axis direction, but each of the adsorption heads 20a to 20f is always offset up and down toward one direction. The suction heads 20a to 20f may be provided in a stepped shape as much as possible. In other words, if the arrangement of the adjacent adsorption heads is offset up and down, the specific arrangement method of the adsorption heads 20a to 20f and the offset form of the adjacent installation heads are the head unit 5 and the adsorption heads 20a to 20f. What is necessary is just to select suitably, in balance with the concrete structure, such as lifting stroke of the wheel). However, in the case of the offset form as shown in Fig. 3, the configuration and control are simple, and do not cause the enlargement of the length and width of the head unit 5, and as shown in Fig. 7, the width of the component Ch ( It is also possible to install a component Ch that is large enough to interfere with the adsorption head (nozzle 21) provided adjacent to the adsorption part Ch in the relationship between the gap Wb between Wa and the adsorption heads 20a to 20f. Therefore, the form as shown in Figure 3 can be said to be the most reasonable form.

In addition, in the installation apparatus of the said embodiment, although each adsorption head 20a-20f is set up and down alternately in the X-axis direction, for example, as a mechanical structure, each adsorption head 20a-20f is moved up and down. It may arrange | position so that it may not be offset, and the lifting stroke of each adsorption head 20a-20f may be controlled by the said controller so that each adsorption head 20a-20f may be offset up and down alternately to an X-axis direction after components adsorption. . In this way, the same effects as the mounting apparatus of the above embodiment can be obtained by controlling the respective adsorption heads 20a to 20f.

In addition, when controlling the lifting stroke of the adsorption heads 20a to 20f in this manner, it is preferable to perform the adsorption operation of the parts in accordance with the flowchart shown in FIG. 8, for example. That is, first, data of components adsorbed by the respective adsorption heads 20a to 20f, for example, data on the type and size of the components, are recorded, and the adsorption components may interfere with each other based on these data. The suction heads 20a to 20f are predicted (steps S21 and S22). The prediction predicts the likelihood of interference, including, for example, the amount of anticipated adsorption deviation (adsorption misalignment tendency). Next, the lift stop positions of the respective adsorption heads 20a to 20f are determined so as to avoid the interference, and the adsorption order of the parts is also determined (steps S23 and S24). The adsorption order is determined by first adsorbing the parts by the adsorption heads 20a to 20f having a high rising stop position, and then adsorbing the parts by the adsorption heads 20a to 20f having a low rising stop position. Decide If the adsorption order is determined, adsorption of components is started in accordance with the order (step S25). In this way, even in the apparatus for controlling the lifting stroke of the suction heads 20a to 20f, the components can be appropriately installed according to the flowchart shown in FIG.

As described above, the present invention provides a surface mounter in which a plurality of adsorption heads are mounted side by side in a head unit, so that at least one adsorption head is offset up and down with respect to an adjacent adsorption head. If the components are adsorbed and held at the same height position, the components interfering with each other or the components interfering with each other when adjusting the mounting angle can be adsorbed by the adsorbing heads adjacent to each other. It is possible to improve, thereby improving the installation efficiency.

In addition, the present invention provides a surface mounting apparatus in which a plurality of adsorption heads are mounted side by side in the head unit, so that after the adsorption of components, the adsorption head is driven so that at least one adsorption head is offset up and down with respect to the adsorption head adjacent thereto. As a result, when the components are adsorbed and held at the same height position by the adjacent adsorption heads, even if the components interfere with each other, the components can be adsorbed by the adsorption heads adjacent to each other. It can be improved, thereby improving the installation efficiency.

Further, in the above configuration, the optical detection means including the light irradiation portion and the light receiving portion extending along the direction in which the suction nozzles are disposed is mounted in the head unit, and each component is connected to the irradiation portion while maintaining the positional relationship between the absorption parts. Since it is arrange | positioned between light receiving parts, the adsorption | suction state of the adsorption part by each adsorption head can be examined efficiently by a common optical detection means. In particular, by inspecting the adsorption state of the components sequentially from the lower side components adsorbed to each adsorption head, and installing the parts which have been inspected in parallel with the adsorption state, the adsorption parts can be inspected and the installation of the parts can be efficiently performed. In addition, the installation efficiency can be improved.

Claims (4)

At least one adsorption head is adjacent to the surface mounter, in which the head unit is equipped with a plurality of adsorption heads for rotatable and lifting parts adsorption, and a control means for controlling the driving of these adsorption heads. Surface mounting apparatus characterized in that it is offset up and down with respect to the suction head. In a surface mounter in which a plurality of adsorption heads for adsorption of parts rotatable and elevating are mounted side by side in the head unit, driving of the adsorption heads such that at least one adsorption head is offset up and down with respect to the adsorption heads adjacent thereto after adsorption of parts. Surface mounting apparatus comprising a control means for controlling the. 3. The adsorption state of the component according to claim 1 or 2, further comprising a light irradiating portion and a light receiving portion that are disposed to face each other with a space for lifting and lowering the suction head, wherein the adsorption state of the component is inspected based on projection detection of the component adsorbed on the suction head. In mounting the optical detecting means to the head unit, the optical detecting means has an irradiation part and a light receiving part which extend along the arrangement direction of the adsorption head and can detect the projection of the components adsorbed to the respective adsorption heads. During the installation operation, the adsorption state of the components adsorbed on the respective adsorption heads is inspected, and the driving of each adsorption head is controlled to arrange the components between the irradiation section and the light receiving section while maintaining the vertical position relationship between the adsorption parts. Installer. 4. The head unit and each suction unit as set forth in claim 3, wherein the control means checks the suction state of the components sequentially from the lower components adsorbed to the respective suction heads, and installs the parts that have been inspected in parallel with the suction unit. Surface installer, characterized in that for controlling the drive of the head.