JPH02305723A - Parts feeder - Google Patents

Abstract

PURPOSE:To detect existence of part at any place and eliminate such a matter like to discharge a stick case wherein parts are contained from a magazine by providing a pair of part existence sensors respectively to a pick-and-place mechanism and a stick case discharge mechanism. CONSTITUTION:Transfer of light signal is performed between a part existence sensor 8b provided to a pick-and-place mechanism 1 on the one side and a part existence sensor 8a provided to a stick case discharge mechanism 2 on the other side, and existence of part is detected. Namely, light signal passes through the inside of a stick case 7 in the bottom stage, above a rail 6 and the opening of a stopper 5 and its transfer is performed. On account of this, to say nothing of the case when parts exist in the pick position, even in the case when they are full in the stick case or on the rail, it becomes detectable.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a component supply device that sequentially supplies and picks electronic components packed in a stick case to pick points using a gravity drop method, and in particular, a component supply device that picks and supplies electronic components packed in a stick case to a pick point one by one using a gravity drop method. This invention relates to an improvement in a component presence/absence detection mechanism that accurately detects the presence or absence of parts.

(Prior art) Figure 2 is a comprehensive catalog of 2 electronic component mounting machines, SeiFa19.
．． This shows a conventional parts supply device as shown in Matsushita Electric Industrial Co., Ltd., page 17. In the figure, (1) is an oscillating pick-and-place mechanism, which oscillates around a fulcrum (1a). At the same time, it can be moved along the rail (ib) in the front and back directions of the drawing. (2) is a stick case ejection mechanism, which moves up and down and left and right to eject the stick case (7) from the stick magazine (3), as shown by the double arrows in the figure.
It is possible to move along the front and back of the drawing. (3) is a stick magazine in which a plurality of stick cases (7) are stacked and stored in a multi-tiered manner while being inclined in the longitudinal direction; (4) is electronic components such as ICs and relays packed in each stick case (7); (6) is a rail arranged at the same inclination angle on the downstream side of the lowest stick case (7), and the electronic components (4) inside the lowest stick case (7) are sent out by falling due to gravity. It slides on the rail (6) and moves to a component pick point (10) where it comes into contact with a positioning stopper (5). The electronic component (4) at the component pick point (lO) is then picked by the pick-and-place mechanism (1). (8a) is a photoelectric sensor light emitting part arranged below the component picking point (10), (8b) is a photoelectric sensor light receiving part installed in the pick and place mechanism (1), and (8b) is a photoelectric sensor light receiving part installed in the pick and place mechanism (1). ) comes to the parts presence confirmation point shown in Figure 2, the photoelectric sensor optical axis (9)
match, and can receive an optical signal from the photoelectric sensor light emitting section (8a). (11) is a stick case support plate.

The conventional parts supply device is configured as described above, and the electronic parts (
4) is sent out by gravity fall, slides on the rail (6) and moves to the component pick point (10). The electronic components (4) at the component pick point (lO) are sequentially picked by the pick-and-place machine 5(1).

By the way, when the electronic component (4) is present at the component pick point (10), the optical signal output from the photoelectric sensor light emitting section (8a) is blocked by the electronic component (4) and the optical signal output from the photoelectric sensor light receiving section ( 8b), but if there is no electronic component (4) at the component pick point (10),
When the pick-and-place mechanism (1) moves to the component confirmation point, an optical signal output from the photoelectric sensor light emitting section (8a) is received by the photoelectric sensor light receiving section (8b). Then, the stick case ejection mechanism (2) determines that the bottom stick case (7) is empty, and
Eject the bottom stick case (7) from the stick magazine (3).

[Problem to be solved by the invention] In the conventional component supply device as described above, the component pick point (
Since it is determined whether the bottom stick case (7) is empty by detecting the presence or absence of the electronic component (4) on the rail (6), as shown in Figure 3, for example.
) If the electronic component (4) gets stuck in the stick case (7) at the bottom of the stick case (7) as shown in Figure 4, the electronic component (4) gets stuck in the stick case (
7) It will be determined that the inside is empty. For this reason, the stick case (7), which is still filled with electronic components (4),
) is ejected from the stick magazine (3) by the stick case ejection mechanism (2).

In addition, in the case of a multi-channel system, that is, one set of pick-and-place mechanism (1) and stick case ejection mechanism (2), multiple stick magazines [3]
In this case, the same number of photoelectric sensor light emitting units (8a) as the stick magazines (3) would be required, resulting in an increase in cost.

This invention was made to solve this problem, and it is possible to reliably detect the presence or absence of components in the bottom stick case and on the rail, and even in the case of a multi-channel system, a pair of component presence sensors can detect the presence or absence of components. It is an object of the present invention to provide a parts supplying device that is sufficient and can reduce costs.

[Means to solve the problem]

The parts supply device according to the present invention includes a stick magazine in which a plurality of stick cases are stacked and stored in a multi-tiered manner while being inclined in the longitudinal direction; A rail that guides the parts sent out by gravity falling to the pick position where they contact the stopper, a pick and place mechanism that picks the parts at the pick position, and a stick case located below the stick magazine at the bottom. A stick case ejection mechanism is provided for ejecting the stick case from the stick magazine when the parts run out, and a stopper is provided for the pick and place mechanism. One component presence sensor located on the downstream rail extension line and the above stick case ejection mechanism are installed, and when the stick case ejection mechanism is located at the parts presence confirmation point, the stick case of the lowest stick case upstream The other component presence sensor located on the extension line and the opening provided in the stopper through which the optical signal passes when transmitting and receiving the optical signal between the two component presence sensors through the bottom stick case. It was designed to be provided.

[Effect]

In this invention, optical signals are sent and received between one component presence sensor provided in the pick-and-place mechanism and the other component presence sensor provided in the stick case ejection mechanism, and the presence or absence of components is detected. . That is, the optical signal is transmitted and received through the bottom stick case, on the rail, and through the opening of the stopper. For this reason,
It is possible to detect not only when a component is present at the pick position, but also when it is jammed on a stick case or rail.

In addition, except when ejecting a stick case, the pick-and-place mechanism and stick case ejecting mechanism move in pairs, so even if a multi-channel system is adopted, one set of component presence sensor can detect the components of all channels. Presence detection becomes possible.

〔Example〕

FIG. 1 shows an embodiment of the present invention.
The same reference numerals as in Figures to Figure 4 indicate the same or equivalent parts. (
12) is a stick case support rod that supports the upstream side of the bottom stick case (7), and (13) is a sensor mounting bracket for fixing the photoelectric sensor light emitting part (8a) to the stick case ejection mechanism (2). , photoelectric sensor light emitting part (8a
), when the stick case ejection mechanism (2) moves to the parts presence confirmation point shown in Figure 1, the stick case (7) on the upstream side
7) It is located on an extension line. (14)
is a sensor mounting bracket for fixing the photoelectric sensor light receiving part (8b) to the pick and place mechanism (1), and the photoelectric sensor light receiving part (8b) is a sensor mounting bracket for fixing the photoelectric sensor light receiving part (8b) to the pick and place mechanism (1). When moving to the presence confirmation point, the positioning stopper (5) is positioned on the extension line of the downstream rail (6). Therefore, when detecting the presence or absence of parts, the photoelectric sensor light emitting part (8a)
The optical signal output from the bottom stick case (7
), over the rail (6), and further through the signal passage hole (5a) provided in the positioning stopper (5), and is received by the photoelectric sensor light receiving section (8b).

In the component supply device configured as described above, the electronic components (4) in the stick case (7) at the lowest stage are sent out from the stick case (7) by gravity fall and are positioned by sliding on the rails (6). The 0 component pick point (
The electronic components (4) of 10) are sequentially picked by the pick-and-place mechanism (1).

By the way, when the pick-and-place mechanism (1) and the stick case ejection mechanism (2) move to the parts presence/absence confirmation point, 1. The photoelectric sensor light emitting part (8a) and the photoelectric sensor light receiving part (8b) face each other, and the stick case (7) and the rail (6) at the lowest level
If there is no electronic component (4) on the top, the optical signal output from the photoelectric sensor light emitting part (8a) passes through the bottom stick case (7), then passes over the rail (6), Furthermore, the signal passage hole (5a) of the positioning stopper (5)
) and is received by the photoelectric sensor light receiving section (8b), and it is detected that the electronic component (4) is not present. Then, the stick case ejecting mechanism (2) is activated and the lowermost stick case (7) is ejected from the stick magazine (3).

On the other hand, not only when the electronic component (4) is present at the component pick point (10), but also when the electronic component (4) is stuck inside the stick case (7) or on the rail (6), the photoelectric sensor emits light. The optical signal from the part (8a) is blocked by these parts and is not received by the photoelectric sensor light receiving part (8b). That is, in either case, the presence of the electronic component (4) is detected.

Therefore, not only when the electronic component (4) is present at the component pick point (10) but also when it is stuck inside the stick case (7) or on the rail (6), the electronic component (4) presence can be detected. For this reason, the stick case (7) still has the electronic parts (4) in it.
There is no problem of ejecting the stick case ejecting mechanism (2).

In addition, since the charging sensor light emitting section (8a) is attached to the stick ejection mechanism (2) and the photoelectric sensor light receiving section (8b) is attached to the pick and place mechanism (1), when a multi-channel system is adopted, However, the presence or absence of electronic components (4) in all channels can be detected with a pair of photoelectric sensors (8a) and (8b), and costs can be reduced.

In the above embodiment, the positioning stopper (5) is provided with a signal passage hole (5a) to serve as an opening through which an optical signal passes, but a groove or the like may be used instead of a hole. Further, the photoelectric sensor light emitting section (8a) and the photoelectric sensor light receiving section (8b) may be attached by reversing the device.

〔Effect of the invention〕

As explained above, in this invention, a pair of component presence/absence sensors are provided in the pick-and-place mechanism and the stick case discharge mechanism, respectively, and optical signals are transmitted and received between the two component presence/absence sensors within the stick case at the lowest level. Since it is done through the opening in the top and stopper, it can be used not only when the part is in the pick position, but also when it is stuck in the stick case or on the rail.
Its presence can be detected and the stick case,
There is no problem with the lid being ejected from the stick magazine while parts are stored.

Further, even when a multi-channel system is adopted, the presence or absence of components in all channels can be detected with a pair of component presence/absence sensors, resulting in an effect such as cost reduction.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of a parts supply device showing an embodiment of the present invention, Fig. 2 is a view corresponding to Fig. 1 showing a conventional parts feed device, and Fig. 3 shows a state in which parts are jammed on the rail. FIG. 4 is an explanatory diagram showing a state in which parts are jammed in the stick case. (1)...Pick and place mechanism, (2)...
Stick case ejection mechanism, (3)...Stick magazine, (4)...Electronic component, (5)...Positioning stopper, (5a)...Signal passage hole, (6)...Rail, (7)... Stick case, (8a)... Photoelectric sensor light emitting section, (8b)... Photoelectric sensor light receiving section, (10)... Component pick point. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A stick magazine stores multiple stick cases stacked in multiple stacks while being inclined in the longitudinal direction, and a stick magazine is placed at the same inclination angle on the downstream side of the lowest stick case, and parts are sent out from the stick case by gravity falling.
a rail that guides the pick to a position where it contacts the stopper;
A pick-and-place mechanism that picks the parts at the pick position, and a stick case ejection mechanism located below the stick magazine that ejects the stick case from the stick magazine when there are no more parts in the stick case at the bottom. When the pick-and-place mechanism is located at the component presence confirmation point, one component presence sensor located on the rail extension line downstream of the stopper and the stick case ejecting mechanism are connected to the pick-and-place mechanism. When the stick case discharging mechanism is located at the component presence confirmation point, the other component presence sensor located on the extension line of the stick case upstream of the lowest stick case and the stopper are installed to detect both of the components. 1. A component supply device comprising: an opening through which an optical signal passes when transmitting and receiving an optical signal between presence/absence sensors through a stick case at the lowest stage.