JPH0622463Y2 - Automatic work head device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an automatic work head device for accurately performing a rotation and a reciprocating linear movement operation.

[Prior art and its problems]

FIG. 2 shows a conventional automatic work head device capable of rotating and linear movement. A working head 22 for applying an adhesive is attached to the lower end of a rotating shaft 21 which is rotatably supported. The working head 22 includes an adhesive storage tank 23, a pouring nozzle 24 for the adhesive storage tank 23, and a holder 25 that supports these. A passive gear 26 is fixed to the upper end of the rotary shaft 21. To the passive gear 26, via the drive gear 27,
A pulse motor 28 as a driving means is connected.
In addition, an operating terminal roller 30 of an air cylinder 29 that linearly moves the passive gear 26 is brought into contact with the side surface of the passive gear 26.

In the above automatic work head device, the pulse motor 28
Since the rotation is transmitted via the drive gear 27 and the passive gear 26, it is difficult to control the rotation amount with high accuracy due to backlash of the gear meshing portion. Further, the tooth length L of the drive gear 27 needs a length corresponding to the stroke of the rotary shaft 21 (air cylinder 29) in order to linearly move the rotary shaft 21 back and forth. Therefore, the drive gear 27 becomes large and expensive.

In order to realize high-accuracy rotation control, it is conceivable to adopt a toothed belt with high transmission accuracy instead of the gear. However, if the toothed belt is adopted, the belt slide mechanism that permits the linear reciprocating movement of the rotary shaft 21 in the axial direction becomes complicated.

[Purpose of device]

An object of the present invention is to provide an automatic work head device capable of rotating and linearly moving and capable of controlling the amount of rotation with high precision by a simple mechanism.

[Key points of device]

An automatic work head device according to the present invention is rotatably supported by a linear motion shaft member having a circumferential surface formed with concavities and convexities extending in the axial direction, and a work head mounted at one end of the linear motion shaft member. An intermediate support member that integrally rotatably and slidably supports the linear motion shaft member, a linear movement unit that linearly reciprocates the linear motion shaft member, a rotation drive unit, and a rotation of the rotation drive unit that is linearly moved. The main point is to have a toothed belt transmission mechanism that transmits to the moving shaft member.

[Example of device]

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG.

FIG. 1 is a partial cross-sectional view showing an adhesive applying device as one embodiment of the present invention. In the figure, a pulse motor 2 as a rotation driving means is installed on a mounting base 1. The pulse motor 2 is connected to the drive control unit C of the adhesive application device. Shaft 2a of pulse motor 2
In addition, the toothed pulley 3 is fixed. The mounting base 1 also supports a rotor 5 as an intermediate support member via a pair of upper and lower rotary bearings 4a and 4b.

The rotor 5 supports the spline shaft 7 through a pair of upper and lower spline bearings 6a and 6b so as to be integrally rotatable and slidable in the axial direction. A plurality of sliding grooves (splines) 7a are formed on the circumferential surface of the spline shaft 7 so as to extend along the axial direction thereof. Instead of the sliding groove 7a, a protruding tooth may be extendedly formed. A toothed pulley 8 is fixed to the upper end of the rotor 5.

A toothed belt 9 is wound between the pair of toothed pulleys 3 and 8. The toothed belt 9 is less slippery than an ordinary belt and has no backlash or the like in gear engagement, so that an accurate and smooth rotation transmission effect can be obtained.

A disc 10 is fixed to the upper end of the spline shaft 7. Between the disc 10 and the toothed pulley 8, a tension spring 1
1 is stretched. The tension spring 11 urges the spline shaft 7 in the downward direction in this example.

On the right side of the spline shaft 7 in the figure, a linear drive mechanism Ld for raising and lowering the spline shaft 7 is provided.
The linear drive mechanism Ld generally includes an air cylinder 12, a roller member 13 fixed to the tip of the piston rod 12a, and a linear shaft 1 slidably guiding and supporting the roller member 13.
4 and is fixed to the tip of the mounting base 1.
The air cylinder 12 is connected to the drive control unit C described above. The roller member 13 is composed of an arm 13a slidably inserted into the linear shaft 14 and a roller 13b rotatably supported at the tip of the arm 13a. The roller 13b is brought into contact with the lower surface 10a of the disk 10. is there. Linear drive mechanism
By providing the roller 13b as the action contact terminal of Ld,
This avoids the inconvenience that the working terminals abut and the rotation of the spline shaft 7 is hindered. The linear shaft 14
A coil spring 15 is externally attached to the. The coil spring 15 is provided to cushion the impact when the roller member 13b descends.

A working head 16 is attached to the leading end of the spline shaft 7 on the advancing side (lower side). Working head 16 of this example
Is an adhesive application work head, and is a pouring nozzle 17,
Adhesive storage tank 18 and holder 19 supporting them
Consists of. Holder 1 with rotation of spline shaft 7
9 is rotated, and the pouring nozzle 17 is positioned.

Next, the operation of the adhesive application device will be described.

When the target component to which the adhesive is applied is positioned below the work head member 16, the pulse motor 2 is rotated by a predetermined number of pulses according to an instruction from the drive control unit C, and the pouring nozzle 1
7 positioning is performed.

That is, the rotation of the pulse motor 2 is transmitted to the toothed pulley 3 → the toothed belt 9 → the toothed pulley 8 → the spline shaft 7, and the working head member 16 is moved to the spline shaft 7
Rotate a predetermined amount around. At this time, since the rotation is transmitted via the toothed belt 9, the rotation is surely and smoothly transmitted, and the pouring nozzle 17 can be accurately positioned above a predetermined pouring position. After the positioning of the pouring nozzle 17 in the rotation direction is completed, the drive control unit C immediately operates the air cylinder 12 and retracts the piston rod 12a. As a result, the spline shaft 7 and the working head 16 are lowered by the tension spring 11 by a predetermined distance, and the pouring nozzle 17 is positioned at a target pouring position. This completes the positioning of the pouring nozzle 17,
Then, a predetermined amount of adhesive is poured out and applied to the target component.

When the application of the adhesive is completed, the air cylinder 12 is operated to project the piston rod 12a, and the work head 16
Raise. After that, the same operation as described above is repeated to position the new application target component and apply the adhesive.

It should be noted that the present invention should not be limited to the above specific embodiment, and various modifications can be made within the technical scope of the present invention. For example, the present invention can be applied not only to a positioning mechanism such as an adhesive coating device, but also to an automatic rotation adjusting device of an electric constant adjusting screw in an electric component such as a trimmer capacitor. Further, the present invention can be applied not only when the working head is moved in the vertical direction but also when it is moved in the horizontal direction (horizontal direction).

[Effect of device]

As described above in detail, according to the present invention, the rotating shaft for rotating the working head is supported slidably in the axial direction, and the rotating shaft and the rotation driving means are connected by the toothed belt, The rotation amount of the work head can be accurately controlled with a simple mechanism. Therefore, the work can be performed with high accuracy and the work efficiency can be improved by the small and inexpensive automatic work head device.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an adhesive applying device as a position embodiment of the present invention, and FIG. 2 is a partial sectional view showing a conventional adhesive applying device. 2, 28 ...... Pulse motor 3, 8 ...... Toothed pulley 5 ...... Rotor 7 ...... Spline shaft 9 ...... Toothed belt 12, 29 ...... Air cylinder 16, 22 ...... Working head

Claims (1)

[Scope of utility model registration request] 1. A linear motion shaft member having a circumferential surface formed with concavities and convexities extending in the axial direction, a work head mounted to one end of the linear motion shaft member, and the linear motion shaft member being rotatably supported. An intermediate support member that integrally and rotatably supports the linear movement member, a linear movement unit that linearly reciprocates the linear motion shaft member, a rotation drive unit, and a tooth that transmits the rotation of the rotation drive unit to the support member. An automatic work head device having an attached belt transmission mechanism.