JPH0899240A - Work installation device - Google Patents

Abstract

PURPOSE: To enable a sure rotational direction position control and keep the sufficient quality of a work installation operation by the combination of a rotational direction positioning means with a limit switch. CONSTITUTION: A control means rotates the motive wheel 45 of a rotational direction positioning means 37 by AC motor and thereby, the pin of the motive wheel 45 is inserted into the groove of a driven wheel and the outer surface of the pin 55 is pushed around while sliding on the side surface of the groove. A limit switch is turned on at the position where the motive wheel 45 is rotated by a prescribed angle and the control means stops the operation of AC motor 36. At this time, the driven wheel 46 is rotated by a prescribed angle in a direction facing to the motive wheel 45 and the side surface to be screwed up of a first work is turned upward. Meanwhile, the driven wheel 46 is surely held on a prescribed position by the engagement of the arc shape recessed part with the arc shape projected part 54 of the motive wheel 45. As this result, the side surface, to be screwed up, of the first work is surely turned upward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work attaching device for attaching brackets used for assembling to an automobile body, for example, to opposite side faces of an automobile radio unit, and particularly to a simple and compact type used on a production line side. Work mounting device.

[0002]

2. Description of the Related Art When a car radio unit including a cassette player or a CD (compact disc) player is mounted on a car body, for example, as shown in FIG. The left and right symmetrical brackets 2 and 3 are attached with screws 4, and then fixed to the vehicle body using the attachment holes provided in the brackets 2 and 3.

This bracket mounting operation is usually carried out separately from the automobile body production line, that is, on the so-called line side. As shown in FIG. 10, in the conventional work attaching apparatus 100, the robot 6 is installed on the support base 5. A screw tightening means 7 is attached to a tip of an arm 6a of the robot 6, whereby a car radio unit 1 and a bracket 2, which are set on a jig 9 provided on the support base 5, are attached. Screw tightening with 3 is performed. Further, below the support base 5, a control means 8 is arranged to integrally control the entire operation of the present apparatus.

FIG. 11 is a diagram for explaining the positioning of the automobile radio unit 1 and the brackets 2 and 3 by the jig 9. The jig 9 includes a radio unit receiving jig 11 that can be moved up and down by a predetermined distance in the arrow P direction, and a bracket receiving jig 10 that positions the brackets 2 and 3 by inserting pins 10a into their mounting holes.

When the work mounting device 100 is used, as shown in FIGS. 10 and 11, the automobile radio unit 1 is placed in a raised position in a vertically installed state with its operation panel 1a facing upward. It is set on a certain radio unit receiving jig 11, and then the left and right brackets 2, 3 are set on the bracket receiving jig 10. When the start button (not shown) is pressed after the setting is completed, the control means 8 issues a command to the robot 6 to move the screw tightening means 7 to a predetermined position,
Subsequently, the left and right brackets 2 and 3 are sequentially screwed and attached to the automobile radio unit 1.

When the screw tightening is completed, the bracket receiving jig 10 retreats in the Q direction of FIG. 11, the radio unit receiving jig 11 descends, and as shown in FIG. It is carried to the receiving board 12.

[0007]

However, in the above-mentioned conventional work attaching device 100, the screw tightening means 7 is used.
Has a configuration in which it is attached to, for example, a multi-axis control robot 6 and is controlled to move to a predetermined position and posture, so the equipment cost increases as a device used on the line side.

[0008] In order to use the multi-axis control robot 6, a correspondingly large installation space is required, and the screw tightening means 7 is attached to the tip of the arm 6a of the robot 6 and The arm 6 is operated by the operation of each axis.
Since it is moved by the turning or rocking motion of a,
There was a problem that a larger space had to be secured.

Moreover, the screw tightening means 7 has a driver bit (not shown), which is moved by the robot 6 with a screw set at its tip, and is also tightened from the side. Therefore, there is a risk that the screw may fall off the tip of the driver bit before the screw tightening work, and the work may be interrupted. For this reason, the work efficiency was lowered.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide an inexpensive and compact work attaching device having good workability. .

[0011]

The present invention for achieving the above object comprises at least two outer surfaces of a first work.
A work mounting device for positioning and screwing a plurality of other works respectively at predetermined locations on the above side surface, wherein the first work and the other work are set, and fixing for positioning and fixing them A jig, a screw tightening means for screwing the supplied screw from above toward the other work positioned at a predetermined position of the first work, and a rotation driving means for rotating the fixing jig. A driven wheel connected to the fixing jig, which is provided with a plurality of radial grooves at equal angular intervals and arcuate recesses between these grooves, and at least one pin engaging with the radial groove and the arcuate shape. Rotating direction positioning means provided with a driving wheel connected to the rotation driving means, which is provided with an arcuate convex portion that makes surface contact with the concave portion and performs relative sliding movement, and a predetermined rotation direction of the rotating shaft of the driving vehicle. When a limit switch that detects a position and the other work is screwed to the first work by the screw tightening means, the rotation driving means is stopped based on the detection value from the limit switch. It is a work attaching device characterized by having a control means.

The rotation driving means may be an AC motor, the driven wheel may have four radial grooves at 90 ° intervals, and the driving wheel may have two pins at 180 ° intervals. It is also possible to have a horizontal moving means for horizontally moving the fixing jig, and to connect the horizontal moving means to the control means and operate the horizontal moving means in accordance with the position where the screw is tightened.

Further, a plurality of detecting means for detecting the rotational direction position of the rotary shaft of the driven vehicle when the predetermined screw tightening surface is directed upward are provided and connected to the control means. The screw tightening means may be operated based on the value detected by the detecting means.

[0014]

First, the first work and the other work are set on a fixing jig and fixed at a predetermined position by the fixing jig. Next, the control means rotates the driving wheel of the rotational direction positioning means by the AC motor, whereby the pin of the driving wheel is fitted into the groove of the driven wheel, and the outer surface of the pin slides on the side surface of the groove. While pushing around. Then, the limit sensor is turned on at a position where the motor vehicle is rotated by a predetermined angle, and the control means stops the operation of the AC motor. At this time, the driven vehicle is rotated by a predetermined angle in the direction opposite to the driving vehicle,
The side of the workpiece to be screwed is directed upward.

Here, the prime mover slightly overruns from the position where the limit sensor is turned on due to inertia, but the follower car has its arcuate concave portion engaged with the arcuate convex portion of the prime mover 45 to a predetermined position. Holds securely in position. As a result, the side surface of the first work to be screwed is reliably directed upward.

As described above, the combination of the rotation direction positioning means and the limit switch, which enables a simple and compact structure, enables reliable position control in the rotation direction and ensures sufficient work mounting quality. And
As a result, a simple AC motor can be used as the rotation driving means, and further cost reduction and compactness can be achieved.

Next, the other work is always screwed and fixed to the first work from above by the screw tightening means. Here, the control means operates the horizontal movement means to move these works by a predetermined distance in the horizontal plane and tighten the screw at a predetermined position.

When the mounting of one of the other works is completed in this way, the control means rotates the AC motor in a predetermined direction so as to tighten the screws of the rest of the other works. Then, the limit sensor is turned on at a position where the motor vehicle is rotated by a predetermined angle, and the control means stops the operation of the AC motor. At this time, the driven wheel is rotated by a predetermined angle in the direction opposite to the driving wheel, and another side surface of the first work to be screwed is directed upward. Next, the same work as described above is attached by screwing. These operations are repeated for all attachments of the other workpieces.

It should be noted that the screw tightening is performed only when the rotational direction position of the rotary shaft of the driven vehicle is detected when the predetermined screw tightening surface is directed upward by the plurality of detecting means, and erroneous screw tightening is performed. Work is avoided.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a plan view showing an embodiment of a work attaching device of the present invention, FIG. 2 is a side view of the device shown in FIG. 1, FIG. 3 is a front view of the device shown in FIG. 1, and FIG. FIG. 5 is a partially enlarged view of the jig rotational position setting means shown in FIG. 1, with a part broken away, FIG. 5 is a right side view of the jig rotational position setting means in FIG.
FIG. 6 is a view of the driving vehicle and the driven vehicle shown in FIG. 4 viewed from the A direction. In the present embodiment, a work attaching device 30 for attaching two left and right brackets 2 and 3 as other works (see FIG. 9) to opposite side surfaces of the automobile radio unit 1 as the first work will be described. The overall view will be described with reference to FIGS. 1 to 3.

As shown in FIGS. 1 to 3, the work mounting device 30 of the present embodiment has a main body frame 31 forming a whole supporting structure.
And a caster 38 is attached to the bottom thereof. That is, it has a compact structure that can be appropriately moved to the line side of the automobile body manufacturing line.

A clamp jig 33 as a fixing jig, a screw tightening means 34, and A as a rotation driving means are provided on a support plate 32 horizontally provided at a substantially central position of the main body frame 31.
A C motor 36, an index mechanism portion 37 as a rotational direction positioning means, a slide unit 40 as a horizontal moving means, and the like are installed, and below the support plate 32, a control means for integrally controlling the entire apparatus is provided. A controller 39 is provided.

The clamp jig 33 is, as shown in the drawing,
It has a guide portion 42 and a clamp portion 43, and the guide portion 42 positions the set automobile radio unit 1 at a predetermined position. On the other hand, the clamp portion 43 clamps the automobile radio unit 1 and the brackets 2 and 3 together while positioning the brackets 2 and 3, and fixes them on the guide portion 42. This clamp part 4
3 is swingable in the direction of arrow B shown in FIG.
The vehicle radio unit 1 and the like can be clamped and unclamped by drive means (not shown). An air cylinder, for example, is used as the driving means, but the driving means is not limited to this.

The automobile radio unit 1 is set on the clamp jig 33 in a horizontal state as mounted on a vehicle as shown by reference numeral "1a" in FIG. 2, but when tightening screws, As indicated by reference numeral "1b", the A
The clamp jig 33 is rotated by the C motor 36.

In this embodiment, an AC induction motor with a speed reducer is used as the AC motor 36.
In particular, it has a simple structure without a brake mechanism. Further, as the rotational position control, servo control using a servo motor is often performed, but since the configuration is complicated and the cost is high and a space for installing the servo driver is required, in the present embodiment, Not used, and by the index mechanism portion 37 and the like described later,
It is configured to perform simple and reliable rotational direction position control.

In the present embodiment, in particular, the index mechanism portion 37 is provided between the AC motor 36 and the clamp jig 33, and the automobile radio unit 1 and the bracket 2 set on the clamp jig 33. It serves to transmit the rotational driving force of the AC motor 36 in order to rotationally move the screw 3 to a predetermined rotational direction position for tightening the screw and to securely hold the AC motor 36 in the predetermined rotational direction position.

As shown in FIG. 4, the index mechanism portion 37 has a case 44 as a frame, and a driving wheel 45 and a driven wheel 46 are arranged in the case 44.
The prime mover 45 is fixed to the input shaft 47 by a key or the like not shown, and the input shaft 47 is rotatably supported by bearings 48a and 48b. On the other hand, the driven wheel 46 is fixed to the output shaft 49 by the key 51, and the output shaft 49 is rotatably supported by the bearings 50a and 50b. Further, the input shaft 47 is connected to the main shaft 36a of the AC motor 36 via a coupling 52, and is configured to transmit the rotational driving force from the AC motor 36.

As shown in FIG. 6, the driven wheel 46 is formed with four radial grooves 56 at 90 ° intervals and arcuate recesses 57 between these grooves. The gear having such a shape is called a Geneva gear. On the other hand, as shown in FIGS. 4 and 6, the drive wheel 45 is fitted into and engaged with the radial groove 56 of the driven wheel 46 180.
Two pins 55 spaced apart from each other and an arcuate convex portion 54 that makes surface contact with the arcuate concave portion 57 of the driven wheel 46 and performs relative sliding movement are provided.

In the state shown in FIG. 6, the arcuate convex portion 54 of the driving wheel 45 and the arcuate concave portion 57 of the driven wheel 46 are engaged with each other. Even if the driven wheel 46 rotates in either direction, the driven wheel 46 does not rotate in the same position, and if the pin 55 is within the angle α (for example, about 72 °) in the drawing, it is accurately held in a predetermined position. . This enables simple and reliable rotational position control. Then, for example, when the motor wheel 45 is rotated 180 ° in the direction of arrow C in FIG. 6, the pin 55 on the right side in the figure
Is gradually moved in the direction of the driven wheel 46, and is fitted into and engaged with the radial groove 56 to rotate the driven wheel 46 in the direction of arrow D by 90 °. As described above, according to the index mechanism portion 37 of the present embodiment, it is suitable to attach other works such as the brackets 2 and 3 to the side surface of the rectangular parallelepiped work such as the automobile radio unit 1. The angle α shown in FIG. 6, which represents the allowable range of the rotation direction stop position of the motor vehicle 45, can be set to be sufficiently large.
The position control in the rotational direction becomes more reliable.

Further, since the arcuate convex portion 54 of the driving wheel 45 and the arcuate concave portion 57 of the driven wheel 46 are in sliding contact with each other, the driven wheel 46 is accurately held at a predetermined position, and A limit switch 58 for detecting that the pin 55 is in the position shown in FIG. 6 is installed on the end surface of the case 44 as shown in FIG. This limit switch 58
Uses a proximity sensor that generates and detects an eddy current, and outputs a signal by detecting a dog 59 attached to the end of the input shaft 47. The limit switch 58 is not limited to this, and for example, a photo sensor or a mechanical micro switch can be used.

In the present embodiment, the limit switch 58
The control means 39 is configured to stop the operation of the AC motor 36 based on the detected value by Here, the pin 55 of the prime mover 45 and the radial groove 5 of the driven car 46 are
When coming out of 6, the pin 55 is like thrown out. Therefore, due to this inertia, even if the energization of the AC motor 36 is stopped due to the detection by the limit switch 58, the rotation of the driving wheel 45 does not immediately stop but overruns. However, in this embodiment, as described above, if the pin 55 is within the angle α of FIG. 6,
Even if the prime mover 45 overruns while the arcuate convex portion 54 of the driving wheel 45 and the arcuate concave portion 57 of the driven wheel 46 are in sliding contact with each other, the driven wheel 46 is accurately positioned at a predetermined position. Is configured to be retained.

Further, as shown in FIG. 5, a b position detecting means 60b for detecting the rotational direction position of the automobile radio unit 1 when it is initially set, and a predetermined screw tightening surface are directed upward. A position detecting means 60a and c position detecting means 60 for detecting the rotational position in the case of
c is installed on the end surface of the case 44. This detection means 6
A proximity sensor similar to the limit switch 58 described above is used for 0a to 60c, and a signal is output by detecting the dog 60 attached to the end of the output shaft 49. In addition, these detection means 60a-60
c is not limited to the proximity sensor, and for example,
It is also possible to use a photo sensor or a mechanical micro switch.

In the state shown in FIGS. 5 and 6, the b position detecting means 60b is in the on state. Then, when the driving wheel 45 is rotated 180 ° in the C direction of FIG. 6, the driven wheel 46 moves to D
When the driving wheel 45 is rotated 180 ° in the direction opposite to the C direction in FIG. 6, the driven wheel 46 is rotated in the opposite direction to the D direction. It is rotated by 90 ° and the c position detecting means 60c is turned on. As described above, since the screw tightening is performed when the rotation direction position around the output shaft 49 of the set automobile radio unit 1 is surely detected, the rotation operation failure may occur. If there is, incorrect screw tightening can be avoided and the operator is notified.

As shown in FIG.
As shown in FIG. 3 and FIG. 3, the work payout means 41 is provided. As shown in FIG. 3, the work-discharging means 41 includes a lifter 62 on which the automobile radio unit 1 having the brackets 2 and 3 mounted thereon can be placed, and a guide portion 42 of the clamp jig 33. And an arm 63 for transferring the automobile radio unit 1 to which the brackets 2 and 3 are attached onto the lifter 62. The arm 63 has a motor 6 centered around a shaft 64.
5, the tip end portion is engaged with a predetermined end portion of the automobile radio unit 1, and the reference numeral "63" in the drawing
It can be transferred by rotating to "b".

The screw fastening means 34 is installed above the clamp jig 33, as shown in FIG.
The screw tightening means 34 of the present embodiment has a driver bit (not shown), and the screws are aligned and supplied in a predetermined posture from the adjacent parts feeder 35. The brackets 2 and 3 are attached by tightening screws.

Further, as shown in FIG. 3, the index mechanism portion 37 is installed on the slide unit 40. The slide unit 40 has a slide portion 66 to which the index mechanism portion 37 is fixed, and a drive portion 65 that horizontally moves the slide portion 66 in the axial direction. Here, as the drive unit 65, for example, a motor is used, and a mechanism for feeding and moving the slide unit 66 by rotation of a ball screw is adopted, but the drive unit 65 is not limited to this, and may be moved by an air cylinder or the like. Good. As a result, the automobile radio unit 1 and the brackets 2 and 3 set on the clamp jig 33 that is continuously provided to the index mechanism portion 37 can be horizontally moved by a predetermined distance in the axial direction.

Therefore, in this embodiment, in order to attach the brackets 2 and 3 to the automobile radio unit 1,
It is necessary to screw the two mounting holes 2a, 2b or 3a, 3b (see FIGS. 3 and 9) which are on the same straight line in the axial direction, but the slide unit 40 is horizontally moved by a predetermined distance to tighten the screw. Therefore, the screw tightening means 34 can be configured to have only one driver bit. Further, the slide unit 40 may be configured to be horizontally movable not only in the axial direction but also in a direction orthogonal to the axial direction, and may be a combination of both. In this way, any screw tightening position can be accommodated. It is also possible to adopt a configuration having a plurality of driver bits, and in this case, the installation of the slide unit 40 can be omitted.

FIG. 7 is a schematic block diagram of the apparatus shown in FIG. The controller 39 of the present embodiment includes the AC motor 36, the work delivery means 41, the screw tightening means 34, the slide unit 40, the clamp jig 33,
Further, the index mechanism section 37 and the like are connected and configured so as to comprehensively control the entire apparatus based on signals from the limit switch 58 and the detection means 60a to 60c.

Next, the operation of this embodiment will be described with reference to the control flowchart of the apparatus of this embodiment shown in FIG.
First, the automobile radio unit 1 and the brackets 2 and 3 as works are set horizontally on the clamp jig 33 (see reference numeral "1a" in FIG. 2, step S1).
Next, it is determined whether or not the setting is actually completed at the predetermined position of the clamp jig 33 (step S2), and whether or not there is any work remaining after work completion in the work payout means 41 (step S3). Here, if the work to be screwed is set at a predetermined position and the work for which the work has been completed is removed from the work delivering means 41, the process proceeds to the next step S4, and if not, the step The process returns to S2 and enters the waiting state.

In step S4, when the operator presses a start button (not shown), the clamp portion 4 of the clamp jig 33 is pressed.
3 is operated to clamp and fix the automobile radio unit 1 and the brackets 2 and 3 at predetermined positions (step S5).

Next, the controller 39 controls the AC motor 3
6, the main shaft 36a of the drive shaft 6 is rotated in the forward direction, and the drive wheel 45 of the index mechanism portion 37 is passed through the coupling 52 and the input shaft 47.
Is rotated in the C direction in FIG. As a result, as shown in FIG. 6, the pin 55 on the right side of the driving wheel 45 in the figure fits into the groove 56 of the driven wheel 46, and the cylindrical surface of the pin 55 is groove 56.
Push around while sliding on the side surface of. When the motor wheel 45 rotates 180 °, that is, when the pin 55 on the right side in FIG. 6 is just rotated to the original position of the pin 55 on the left side in FIG.
As shown in, the limit sensor 58 is turned on by the dog 59, and the controller 39 stops the operation of the AC motor 36. At this time, the driven wheel 46 is rotated 90 ° in the direction D in FIG. 6, and the side surface of the automobile radio unit 1 to be screwed is directed upward (reference numeral “1” in FIG. 2).
b ”, step S6).

Here, the prime mover 45 includes the limit sensor 5
Although a slight overrun rotation occurs from the position where 8 is turned on due to inertia, in the driven wheel 46, the arcuate concave portion 57 of the driven wheel 46 is engaged with the arcuate convex portion 54 of the driving wheel 45 as described above, so that the driven wheel 46 is securely positioned at a predetermined position. Held in. As a result, the side surface of the automobile radio unit 1 to be screwed is surely directed upward. It should be noted that the screw tightening is performed only when the detecting means 60a and 60c respectively detect the rotational direction positions when the predetermined screw tightening surface is directed upward.
Incorrect screw tightening work is avoided.

In step S7, the screws supplied from the parts feeder 35 are first attached by the screw tightening means 34 to the mounting hole 2a on the rear side (left side in FIG. 3) of the bracket 2.
(See Fig. 3) Tighten the screws. Next, the controller 39 operates the slide unit 40 to move the work together with the clamp jig 33 backward by a predetermined distance (step S8), and in the same manner as above, the mounting hole 2b on the front side of the bracket 2 (see FIG. 3). The screw tightening is performed (see step S9).

When the mounting of the bracket 2 on the automobile radio unit 1 is completed in this way, the controller 3
9 rotates the main shaft 36a of the AC motor 36 in the direction opposite to that in step S6, and rotates the driving wheel 45 in the direction opposite to the direction C in FIG. And the prime mover 45 is 360 °
When it is rotated, that is, just rotated once, as shown in FIG.
The limit sensor 58 is turned on twice by the dog 59, and the controller 39 stops the operation of the AC motor 36. At this time, the driven wheel 46 is rotated 180 ° in the direction opposite to the direction D in FIG. 6, and the other side surface of the automobile radio unit 1 to be screwed is directed upward (step S10). In this case as well, the drive wheel 45 slightly overruns due to inertia, but the driven wheel 46 is reliably held in a predetermined position, and the side surface of the automobile radio unit 1 is reliably directed upward.

In steps S11 to S13, the bracket 3 is attached to the automobile radio unit 1 by screw tightening in substantially the same manner as in the case of the bracket 2.

When the mounting of the bracket 3 is completed in this way, the controller 39 again causes the main shaft 36a of the AC motor 36 to rotate in the normal direction to rotate the driving wheel 45 in the C direction in FIG. When the drive wheel 45 is rotated 180 °, the limit sensor 58 is turned on, and the controller 39
The operation of the AC motor 36 is stopped. At this time, the driven wheel 46 is rotated 90 ° in the direction D of FIG. 6, and the automobile radio unit 1 to which the brackets 2 and 3 set on the clamp jig 33 are attached is in the initial set state, that is, It returns to the horizontal state (step S14). next,
The clamp part 43 of the clamp jig 33 is operated to release the clamp of the work (step S15).

Next, the controller 39 raises the lifter 62 of the work payout means 41 (step S1).
6). The arm 63 is lifted from the position of the reference numeral "63a" shown in FIG. 3, and after the end portion thereof is engaged with a predetermined end portion of the automobile radio unit 1, it is rotated to the position of the reference numeral "63b". Thus, the automobile radio unit 1 to which the brackets 2 and 3 are attached is transferred onto the lifter 62 (step S17).

Then, the lifter 62 descends (step S18), and the operator removes the automobile radio unit 1 for which the bracket mounting work has been completed (step S19).

As described above, the work attaching device 3 of this embodiment
No. 0 does not perform complicated control using a robot or the like as in the past, but has a simple configuration including the AC motor 36, the limit switch 58, the index mechanism portion 37, etc., so that the equipment cost is greatly reduced. Can be achieved.

Further, since a method is adopted in which the automobile radio unit 1 or the like, which is a workpiece, is rotated together with the clamp jig 33 and the screw tightening means 34 is fixed, it is possible to make the structure extremely compact as compared with the conventional one.

Moreover, even with a simple structure, the position of the workpiece in the rotational direction can be reliably controlled by the combination of the index mechanism portion 37 and the limit switch 58, and the quality of the bracket mounting work can be sufficiently ensured. This also eliminates the need for servo control, etc.
As a result, since the AC motor 36 is used as the rotation driving means, further cost reduction and size reduction can be achieved.

Further, since the fixed screw tightening means 34 is always screwed from above, when moving the screw tightening means conventionally attached to the tip of the robot arm or tightening the screw from the side. Screws that tend to occur can be prevented from falling off, improving work efficiency.

It should be noted that the embodiments described above are provided for facilitating the understanding of the present invention, and not for limiting the present invention. Therefore, each element disclosed in the above embodiments is intended to include all design changes and equivalents within the technical scope of the present invention.

For example, in the above-described embodiment, the work attaching device of the present invention has been described by taking the attachment of the bracket to the automobile radio as an example, but the present invention is not limited to this and other components may be used. Can also be applied. Further, the driven wheel 46 of the index mechanism portion 37 is
Although four radial grooves 56 are provided at 90 ° intervals, if the number of radial grooves 56 is increased or the angle of the intervals is changed, the angle of the mounting surface on the mating side to which the bracket or the like is attached changes. Can also handle.

[0055]

As described above, the work mounting device of the present invention does not perform complicated control using a robot or the like as in the conventional case, but has a simple structure, which results in a large equipment cost. In addition to being able to reduce the number, a method of rotating the work together with the fixing jig and fixing the screw tightening means is adopted, so that the structure can be made extremely compact.

Further, since the screws are always screwed in stably from above, it is possible to prevent the screws from coming off, which has been caused by moving the screw tightening means or tightening the screws from the side, and thus the work efficiency is improved. Is improved.

Moreover, even with a simple structure, the combination of the rotation direction positioning means and the limit switch enables reliable position control in the rotation direction, and sufficient work mounting quality can be secured. This allows
It is not necessary to perform servo control and the like, and as a result, the AC motor is used as the rotation driving means, so that it is possible to achieve further cost reduction and size reduction.

Further, if the driven wheel has four radial grooves at 90 ° intervals and the driving wheel has two pins at 180 ° intervals, the side surface of a rectangular parallelepiped shaped work such as an automobile radio unit. It is suitable for attaching other works such as brackets to, and the allowable range of the stop position in the rotation direction of the prime mover can be made large enough,
The position control in the rotational direction can be made more reliable.

Further, since the horizontal moving means horizontally moves a predetermined distance to tighten the screws, it is possible to cope with a plurality of screw tightening positions on one surface.

Further, the screw tightening is performed only when the rotational direction position of the rotary shaft of the driven vehicle is detected by the detecting means when the predetermined screw tightening surface is directed upward. If there is, it is possible to reliably avoid erroneous screw tightening work.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a work attaching device of the present invention.

2 is a side view of the device shown in FIG. 1. FIG.

3 is a front view of the device shown in FIG. 1. FIG.

FIG. 4 is a partially enlarged view of the jig rotational position setting means shown in FIG.

5 is a right side view of the jig rotation position setting means of FIG. 4. FIG.

FIG. 6 is a view of the driving vehicle and the driven vehicle shown in FIG. 4 viewed from the A direction.

FIG. 7 is a schematic block diagram of the apparatus shown in FIG.

FIG. 8 is a control flowchart of the apparatus shown in FIG.

FIG. 9 is a diagram illustrating how to attach a bracket to a car radio.

FIG. 10 is a schematic front view showing a conventional work attaching device.

11 is a diagram for explaining positioning of a car radio and a bracket by a jig of the device shown in FIG.

[Explanation of symbols]

 1 ... Automotive radio unit (first work), 2, 3 ... Bracket (other work), 33 ... Clamp jig (fixing jig), 34 ... Screw tightening means, 36 ... AC motor (rotation driving means) , 37 ... Index mechanism part (rotation direction positioning means), 39 ... Controller (control means), 40 ... Slide unit (horizontal moving means), 45 ... Drive wheel, 46 ... Follower wheel, 54 ... Arc convex portion, 55 ... Pins, 56 ... Grooves, 57 ... Arc-shaped recesses, 58 ... Limit switches, 60a, 60c ... Detection means.

Claims (4)

[Claims] 1. A work attachment device for positioning and screwing a plurality of other works at predetermined locations on at least two or more side surfaces forming the outer surface of the first work, wherein the first work and The other work is set,
A fixing jig for positioning and fixing these, a screw tightening means for screwing the supplied screw from above toward the other work positioned at a predetermined position of the first work, and the fixing jig And a driven wheel connected to the fixing jig provided with a plurality of radial grooves at equal angular intervals and arcuate recesses between these grooves, and engaging with the radial grooves. And at least one pin which is in contact with the arcuate concave portion and is provided with an arcuate convex portion that makes a relative sliding motion and is connected to the rotary drive means. A limit switch for detecting a predetermined rotational direction position of the rotary shaft of, and the limit switch when the other work is screw-fastened to the first work by the screw fastening means. Workpiece mounting apparatus characterized by a control means based on the detected value of al stopping the rotation driving means. 2. The rotation driving means is an AC motor,
The work mounting device according to claim 1, wherein the driven wheel has four radial grooves at 90 ° intervals, and the driving wheel has two pins at 180 ° intervals. 3. A horizontal moving means for horizontally moving the fixing jig, wherein the horizontal moving means is connected to the control means and is operated in accordance with a screw tightening position.
Alternatively, the work attachment device according to item 2. 4. A plurality of detecting means for respectively detecting a rotational direction position of a rotation shaft of the driven vehicle when a predetermined screw tightening surface is directed upward is connected to the control means, the control means The work mounting device according to any one of claims 1 to 3, wherein the screw tightening means is operated based on a value detected by the detecting means.