JP4149193B2 - Screw supply method and screw supply tray in multi-axis screw tightening machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screw supply method and a screw supply tray in a multi-axis screw tightening machine.
[0002]
[Prior art]
For example, the assembly of a magnetic disk recording apparatus requires a large number of screw tightening processes, and in order to automate this, a multi-axis screw tightening machine capable of tightening a plurality of screws at a time is frequently used. A parts feeder is used to supply screws to the screw tightener.
[0003]
[Problems to be solved by the invention]
However, screw supply by the parts feeder uses vibration for screw alignment operations, etc., so it tends to generate dust and is not suitable for use in work environments that hate dust such as assembly of magnetic disk recording devices. There is. In order to solve this problem, it is possible to blow the screw aligned by the parts feeder inside the tube and supply it to the multi-axis screw tightening machine. In addition to the limitations, there are problems in that the supply efficiency is reduced and the dust cannot be completely blocked.
[0004]
The present invention has been made to eliminate the above drawbacks, and has a high screw supply efficiency and can be used for a screw supply method in a multi-axis screw tightening machine capable of maintaining environmental cleanliness. The purpose is to provide a simple screw supply tray.
[0005]
[Means for Solving the Problems]
The multi-axis screw tightening machine 2 includes a plurality of screw holding portions 3 at positions corresponding to the screw tightening locations so that the screw tightening operation can be simultaneously performed on the plurality of screw tightening locations on the workpiece 1. The screws 4 supplied to the screw holders 3 are aligned on the tray 5 so as to match the positional relationship of the screw holders 3. This is done by moving the screw 4 to the pick-up position of the screw tightening machine 2.
[0006]
As a result, the supply efficiency of the screw 4 is improved as compared with the case where the screw 4 is sequentially supplied to each screw holding portion 3. Further, in order to use the tray 5, the screws 4 are aligned to the tray 5 in which dust is generated, and the like is performed outside the clean room. Since the supply can be performed, the environment in which the screwing operation is performed can be kept clean.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
First, FIG. 3 shows a work 1 to be screwed using a multi-axis screw fastening machine 2. This work 1 is a magnetic disk recording apparatus in which an upper opening of a base 1a accommodating a magnetic disk is closed by a cover 1b, and has six screw fastening points on the peripheral part of the base 1a and two parts on the central part. Moreover, in this embodiment, the screw 4 fixed to the peripheral part 6 locations has a larger nominal diameter than the screw 4 fixed to the central portion 2 locations.
[0008]
FIG. 4A shows a screw tightening machine 2 for performing the screw tightening operation of the workpiece 1. The screw tightening machine 2 is a multi-axis screw tightening machine 2 in which a plurality of screw holding portions 3 are provided on a screw tightening head 2a that can move along three axes of XYZ translation. The screw 4 supplied at the screw 4 suction position is screwed to the workpiece 1 at the work position while being reciprocated between the screw 4 suction position and the screw 4 suction position. The screw holding portion 3 of the screw tightening machine 2 can hold the head portion of the screw 4 by suction, and a bit (not shown) is fitted to the fitting portion of the head portion of the screw 4 in the suction state to give the screw 4 rotational torque. can do. The plurality of screw holding portions 3 are paired at a screw tightening portion with respect to the work 1 so that the screw tightening operation can be performed simply by moving the screw tightening head 2a up and down relative to the work 1 and rotating the bit. 1 The position is adjusted so as to correspond. That is, the arrangement of the screw holding portions 3 viewed from the direction of the arrow 4A in FIG. 4 matches the arrangement of the screws 4 in FIG.
[0009]
FIG. 4B shows a screw supply device 9 for supplying the screw 4 to the screw tightening machine 2 at the screw 4 suction position. The screw supply device 9 includes a tray housing portion 9a, a tray transport portion 9b, and a component take-out portion 9c. The tray accommodating unit 9a includes a tray supply unit 10 on the upper side and a tray collection unit 11 on the lower side of the tray conveyance unit 9b, and the screw supply tray 5 supplied to the tray supply unit 10 includes the tray conveyance unit 9b. Are sequentially conveyed to the component take-out portion 9c, and are supplied to the screw holding portion 3 of the screw tightening machine 2 in the component take-out portion 9c. As will be described later, the screw supply tray 5 can supply screws 4 for a plurality of workpieces, and the screw supply tray 5 that has been emptied after the supply screws 4 are used up can be supplied by a tray transport unit 9b. After being conveyed to the side, it is collected by the tray collection unit 11.
[0010]
1 and 2 show the screw supply tray 5. The screw supply tray 5 is formed by fixing support legs 12 to the back surfaces of the four corners of the support plate 7 in which a large number of screw holding holes 6 are formed. The screw holding hole 6 is formed at a position where the positional relationship of the screw fastening portion to the work 1 shown in FIG. FIG. 2 shows a state in which the screw 4 is inserted into the screw holding hole 6, and the screw 4 corresponding to the screw tightening portion to the one workpiece 1 is indicated by a black circle.
[0011]
Further, as described above, two types of screws 4 are used for the workpiece 1, and correspondingly, the support plate 7 is formed by connecting two sub-support plates 8, 8 ′. . The first sub-support plate 8 for holding the screws 4 used at the periphery of the work 1 is formed in a frame shape with an opening at the center, and support legs 12 are fixed to the back surfaces of the four corners. The second sub-support plate 8 ′ for holding the screw 4 used in the center portion of the work 1 has a rectangular shape that is fitted and fixed in the opening of the first sub-support plate 8, and has four corners. The support leg 12 is fixed to the part. In order to connect and position the first and second sub-support plates 8 and 8 ', the first sub-support plate 8 has a positioning boss 14 that fits into a positioning hole 13 formed in the second sub-support plate 8'. It is formed.
[0012]
The support plate 7 formed as described above holds the screws 4 for a plurality of workpieces. The screw holding hole 6 is a group of screw holding holes 6 for holding the screws 4 used simultaneously by the screw tightening machine 2 (screw holding hole group) so that the screws 4 of a large number of workpieces 1 can be held in a small space. ) Are shifted by a predetermined pitch (px, py).
[0013]
Therefore, in this embodiment, when supplying the screws 4 to the screw tightening machine 2, first, the predetermined screws 4 are aligned and held in the screw holding holes 6 of the screw supply tray 5. When the screw tightening operation needs to be performed in a clean environment such as a clean room, the screw alignment operation to the screw supply tray 5 is performed outside the clean room, and further, dust is removed by washing as necessary. Further, the supply of the screws 4 to the screw supply tray 5 is performed for each sub-support plate 8, and mixing of screw types is prevented.
[0014]
The screw supply tray 5 in which the screws 4 are aligned as described above is mounted on the screw supply device 9 and conveyed to the screw 4 suction position of the screw tightening machine 2. As described above, since the screws 4 used in one screw tightening operation are arranged on the screw supply tray 5 in a state in which the relationship of the screw holding portion 3 of the screw tightening machine 2 is maintained, The corresponding screw 4 can be attached to the screw holding portion 3 simply by moving the screw tightening head 2a onto the screw supply tray 5 and performing an adsorption operation. When the screw tightening operation by the screw tightening head 2a is completed, a new screw group can be supplied to the screw holding unit 3 only by shifting the screw supply tray 5 by px or py.
[0015]
【The invention's effect】
As is apparent from the above description, according to the present invention, the screw supply efficiency can be increased and the cleanliness of the environment can be maintained.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a tray.
2 is a plan view of FIG. 1. FIG.
FIGS. 3A and 3B are views showing a workpiece, wherein FIG. 3A is a plan view and FIG. 3B is a front view.
FIG. 4 is a view showing a screw tightening machine.
[Explanation of symbols]
1 Workpiece 2 Multi-axis screw tightening machine 3 Screw holding part 4 Screw 5 Tray 6 Screw holding hole 7 Support plate 8 Sub support plate

Claims (2)

A screw supply method in a multi-axis screw tightening machine having a plurality of screw holding portions corresponding to a plurality of screw tightening points on a workpiece ,
Maintaining the positional relationship of the plurality of screws picked up simultaneously by the screw holding section , aligning and holding the screws for a plurality of workpieces on the tray by shifting by a predetermined interval ,
When the screw type is different, a plurality of sub-support plates formed separately for each screw type are positioned on each other and held on the tray connected detachably,
A screw supply method in a multi-axis screw tightening machine, wherein screws are supplied from the tray to a screw holding portion. A screw supply tray for supplying screws to a multi-axis screw tightening machine having a plurality of screw holding portions corresponding to a plurality of screw tightening points on a workpiece,
Said maintaining a plurality of positional relationship of the screw to be picked up simultaneously by the screw holding unit, and Rashi not a predetermined interval a plurality of work amount of the screw is retained,
A screw supply tray comprising a plurality of sub-support plates that are formed separately for each screw type and are detachably connected to each other when the screw types are different .

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