JPH0334955Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a component mounting device that automatically attaches components to predetermined positions on a board.

(b) Conventional technology With the spread of automatic assembly machines, the reliance on automatic assembly machines has increased in the assembly work of electrical products, etc.
High-level assembly operations are performed using X-Y or scalar assembly machines with position detection means and electronic support means.

As shown in Fig. 4, these processing machines vibrate an arm 1 with a maximum extension distance L around a fulcrum O to a desired position in three-dimensional space, and grip a component such as a power transformer at that point. At assembly processing head 2,
It performs the operation of attaching the part to a cabinet or the like. In this case, the only part directly involved in assembly processing is the assembly processing head 2.
The positioning accuracy for assembling parts to the cabinet or chassis has a significant effect on the assembly processing accuracy of the assembly processing head 2.

(c) Problems to be solved by the invention When trying to avoid as much as possible the influence of the assembly processing head on assembly processing accuracy, it is important to consider the difference between the actual position of the assembly processing head of an automatic assembly machine and the desired position. It is usually necessary to set the related feeding mechanism and electronic support means to narrow down the deviation between the two to a maximum of about 500 μm to 1000 μm. To this end, the target accuracy when machining these related mechanisms and support means should preferably be at least twice the deviation accuracy mentioned above.
It needs to be multiplied by 10. This has become a bottleneck, making automatic assembly machines difficult and expensive to manufacture. The greater the versatility of automatic assembly machines, the more this tendency becomes apparent.

However, in the work of attaching and fixing parts to cabinets, chassis, etc., it is generally not necessary to use an automatic assembly machine capable of this type of high-precision machining. In particular, when assembling a relatively large amount of the same type or similar parts, an automatic assembly machine will operate more like a special-purpose machine, and even in this case, it will be used only for positioning the assembly processing head. We use expensive, high-precision automatic assembly machines.

In view of this, the present invention aims to provide a component mounting device that can accurately assemble components onto a board without requiring the assembly precision of an automatic assembly machine.

(d) Means for solving the problem In order to solve the problem, the present invention provides a component mounting boss provided on a substrate as a workpiece,
A plurality of guide pins provided on the board and located around the component mounting boss, a transfer arm that transfers the tip head holding the component to a position near the component mounting boss, and a transfer arm provided on the tip head of the transfer arm to transfer the component to a position near the component mounting boss. It is equipped with gripping fingers that can be detachably gripped, and a tentacle part that is provided on the tip head and that abuts against a guide pin to position the tip head when the tip head is lowered from above the component mounting boss. be.

(E) Action The gripping fingers of the tip head grip the component, and in this state, the transfer arm having the tip head transfers the tip head to a position near the component mounting boss using the feeding mechanism and electronic support means. . In this case, the transfer accuracy at the target point may be about ±5 mm, and the feed mechanism and electronic support means in the automatic assembly machine do not require the high accuracy of conventional devices.

When the distal end head is lowered from a position near the component mounting boss, the tentacle portion provided on the distal head abuts against a guide pin provided on the substrate at a position near the component mounting boss. Due to this abutment, the position of the tip head is corrected, and the component gripped by the gripping fingers of the tip head is placed on the component mounting boss.

(f) Examples An embodiment of the present invention will be described based on the drawings.

FIG. 3 is a perspective view of the parts and the board, and is shown as an explanatory model diagram for attaching the parts to the board. In this figure, the substrate 3 is shown as a rectangular plate, which is part of the cabinet. On this board 3, a pair of component mounting bosses 4, 4 are provided.
A plurality of guide pins 5 located near and around this component mounting boss are integrally provided with a resin material.

On the other hand, the component 6 is a power transformer, and by screwing the mounting screw 9 into the hole 10 of the component mounting boss 4 through the through holes 8 provided in the mounting legs 7, 7,
The component 6 is attached to the component attachment bosses 4,4.

An automatic assembly machine is used to place the component 6 onto the component mounting bosses 4,4.

The transportation of parts by an automatic assembly machine will be explained based on FIG. FIG. 1 is a perspective view of the distal head and base plate of the automatic assembly machine. The automatic assembly machine has a transfer arm 11, and a distal end head 12 is provided at the distal end of the transfer arm. As shown in FIG. 4, the transfer arm 11 is telescopically movable with respect to the origin O within a rotational range of 270 degrees, for example, and the distal end head 12 is rotatably supported within a hemisphere relative to the transfer arm 11. These transfer arms 11 and distal heads 12
is controlled by a signal from the host control means.

The distal head 12 has a pair of gripping fingers 13,13. Each grasping finger has an upper finger 14 and a lower finger 15, and each upper finger 14 is connected to the distal end head 12, and the lower finger 15 is connected to the upper finger 14 by a hinge mechanism. Further, each lower finger 15 has a rotation support part 17 for a hydraulic arm 16, and is configured so that each gripping finger 13 swings by extending and contracting the hydraulic arm 16 by hydraulic control means in the distal end head 12. has been done. Therefore, the component 6 can be gripped by supporting both mounting legs 7 of the component 6 in the bent state of each gripping finger 13 .
The gripped part 6 in the extended state can be released. The hydraulic control means for controlling the gripping fingers 13 is controlled by the host control means, and its transmission means is conductive or light guiding, and when the host control means has a large capacity, the conductive transmission means is controlled by the driving power. If a large amount of control information signals are supplied by the light guide transmission means, the signals can avoid the influence of external noise and can be expected to have the ability to supply a large amount of information. When this is not necessary, both may be supplied by conductive transmission means.

A driver 18 is provided on the lower surface of the tip head 12 in correspondence with the through hole 8 of the mounting leg 7 of the component 6. Immediately below each driver 18, a mounting screw 19 is held in a suspended state by a pair of swingable chuck members 20, 20, and when the driver 18 is lowered, the pair of chuck members 20, 20 are expanded and installed. The screw 19 is attracted and held by the driver 20, and the mounting screw is screwed into place. The mounting screws 19 are sequentially supplied from a screw supply tube 21 held on the side surface of the distal head 12.

On the opposite sides of the distal head 12, tentacles 22 are provided which correspond exactly to the positions of the guide pins 5, respectively. This tentacle part is designed so that when the distal end head 12 descends from a position near the component mounting boss 4, the skirt part 23 of the tentacle part abuts against the guide pin 5, and the guide pin 5 gradually enters the center of the skirt part 23. As a result, the position of the distal end head 12 relative to the component mounting bosses 4, 4 is mechanically adjusted. For this reason, it is preferable that the tip of the guide pin 5 has a truncated conical shape.

When the tip head 12 is lowered, each through hole 8 of the component 6 aligns with the hole 10 of the component mounting boss 4, and the component 6
is placed on the component mounting bosses 4, 4. In this state, each screwdriver 18 descends and tightens the mounting screw 19.
The component 6 is screwed into the hole 10 through the through hole 8 and attached to the component attachment bosses 4, 4.

As shown in FIG. 2, a shock absorber 24 located inside the tip head 12 is provided at the root of each tentacle 22, and the concentrated stress at the root when the tentacle 22 abuts against the guide pin 5 is applied. I am trying to alleviate this.

(g) Effect of the invention The invention has a component mounting boss provided on the board,
A plurality of guide pins provided on the board and located around the component mounting boss, a transfer arm that transfers the tip head holding the component to a position near the component mounting boss, and a transfer arm provided on the tip head of the transfer arm to transfer the component to a position near the component mounting boss. It is equipped with gripping fingers that can be detachably gripped, and a tentacle part that is provided on the tip head and that abuts against a guide pin to position the tip head when the tip head is lowered from above the component mounting boss. Because of this, when the tip head is lowered from above the component mounting boss, the tentacles collide with the guide pins, allowing fine adjustment of the position of the tip head, that is, the position of the component relative to the component mounting boss. There is no need to increase the accuracy of transferring parts to a nearby position on the mounting boss as with conventional devices, and it is possible to use an automatic assembly machine with simplified feeding mechanisms and electronic support means for the transfer arm and tip head.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
Fig. 1 is a perspective view of the tip head and the board, Fig. 2 is a perspective view of the tentacle, Fig. 3 is a perspective view of the parts and the board, and Fig. 4 is an explanatory diagram of the operating range of the automatic assembly machine. 3... Board, 4, 4... Component mounting boss, 5, 5
... Guide pin, 6 ... Parts, 11 ... Transfer arm, 12 ... Tip head, 13, 13 ... Gripping fingers, 18, 18 ... Driver, 19, 19 ...
Mounting screw, 22...tentacle part, 23...skirt part.

Claims (1)

[Scope of Claim for Utility Model Registration] A component mounting boss provided on a board, a plurality of guide pins provided on the board and located around the component mounting boss, and a distal end head that grips a component located near the component mounting boss. A transfer arm that transfers the component to the component, a gripping finger that is provided on the distal head of the transfer arm and that grips the component in a detachable manner, and a gripping finger that is provided on the distal head that collides with a guide pin when the distal head is lowered from above the component mounting boss. A component mounting device comprising: a tentacle portion for positioning a distal end head;