JPH07116935A - Work assembling method and device thereof - Google Patents

Abstract

PURPOSE:To assemble a work without adjusting a work assembling device every time when a kind of an assembling object part being an assembling object or a kind of work is changed and without causing installation failure of the work by coping instantly even with an individual difference in the assembling object part in an automatic assembling line. CONSTITUTION:A device is composed of an assembling line to carry a carrying pallet 1 on which an assembling object part 2 is placed, a measuring means A arranged above an assembling line so as to measure an assembling object part height of the assembling object part 2 mounted on the carrying pallet 1, a judging means to determine an installation height of a work 3 according to the assembling object part height of the assembling object part 2 measured by the measuring means A and a work installing means B to install the work 3 on the assembling object part 2 by receiving output of the judging means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work assembling method and apparatus for mounting a work on a portion to be assembled, such as mounting a minute hand on a minute hand pipe of a timepiece mechanical body in assembling a timepiece. .

[0002]

2. Description of the Related Art In recent automatic assembly, there has been a demand for mass production of a wide variety of products to mass production of a wide variety of products. In the case of assembling a timepiece, there is a timepiece assembling line in which the timepiece mechanical body and the hands (hour hand, minute hand, second hand) are common, but the timepiece frame that accommodates the timepiece mechanical body is different. For example, a case of an assembling device that attaches the minute hand to the minute hand pipe of the timepiece mechanical body will be described. The assembling device is adjusted according to the timepiece mechanical body housed in a certain type of timepiece frame body, and the assembly work is continuously performed with the timepiece fixed to the adjustment, and then the different timepiece frame body Since the height position of the minute hand pipe changes when the timepiece machine housed in is assembled, the trial assembly is performed intermittently in order to make adjustments according to the timepiece frame body. The assembly apparatus is adjusted while measuring the assembly and confirming the mounting condition, and after the adjustment is completed and the assembly is fixed, the assembly work is performed again continuously.

[0003]

As described above, according to the conventional method and apparatus for assembling a work, the parts to be assembled or the works to be mounted on the parts to be assembled are in a fixed adjustment state unless the model is changed. The automatic assembling work by the work assembling device is continued. In automatic assembly, even if small-lot production of a wide variety of products is required, adjustment of the assembly equipment, which is performed from trial assembly work every time the model is changed, is a great loss of time, and the operating rate of the automatic assembly line is significantly reduced. It becomes a thing. Furthermore, there are individual differences in the parts to be assembled, and in the adjustment state where they are fixed under certain conditions, the work may not be optimally mounted on the parts to be assembled, resulting in defective mounting of the work. Sometimes it ends up.

Therefore, an object of the present invention is to automatically adjust the work assembling apparatus whenever the model of the parts to be assembled or the model of the work to be assembled is changed in the automatic assembly line. The purpose is to immediately respond to individual differences in the parts to be assembled so that the work can be assembled without causing defective mounting.

[0005]

In order to achieve the above object, according to the present invention, the height of an assembled portion of an assembled component which is loaded on a transport pallet and is transported on an assembly line is measured by a measuring means. Measurement is performed, the mounting height of the work is determined based on the measurement result obtained by the measuring means, and the work is mounted on the assembly target portion via the work mounting means.

The work assembling apparatus is provided above the assembly line for carrying the carrying pallet on which the parts to be assembled are placed, and above the assembling line, the parts to be assembled of the parts to be assembled mounted on the carrying pallet. Measuring means for measuring the height of the workpiece, a determining means for determining the mounting height of the workpiece based on the height of the assembled portion of the assembled component measured by the measuring means, and a workpiece that receives the output of the determining means. And a work mounting means mounted on the component to be assembled.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the preferred embodiments shown in the accompanying drawings.

FIG. 1 shows a work assembling apparatus of the present invention.
The present embodiment is an assembly apparatus for mounting the minute hand 3 to the minute hand pipe 2a of the timepiece mechanical body 2 incorporated in the timepiece frame body 2b. FIG. 2 shows the assembly target parts of the present embodiment. A minute hand pipe 2a which is an assembled part and a minute hand 3 which is a work are shown. The timepiece mechanical body 2 is mounted on a component mounting base 1a provided on the transport pallet 1 and is fixed by a component pressing member 1b which is elastically pressed by a spring (not shown).

The assembly line of the work assembly apparatus of the present invention is
The conveyor pallet 1 is constituted by a belt-conveying conveyor 5 including a pair of conveyor belts 5a that support the left and right ends of the conveyor pallet 1. The conveyor belt 5a on which the conveyor pallet 1 is directly placed
The lower part is supported by the conveyor belt guide 5b. Both ends of the conveyor belt 5a are supported by rotatably supported pulleys 5c and 5c, and the rotation of a motor 5d disposed below the conveyor 5 is transmitted to one pulley 5c to convey the conveyor. 5 drives. The timepiece mechanical body 2 incorporated in the timepiece frame body 2b which is a component to be assembled is mounted on the conveyance pallet 1 and conveyed on the assembly line.

A measuring means A and a work mounting means B are arranged on the assembly line, and the measuring means A is located upstream of the work mounting means B in the assembly line. Positioning means C for the transport pallet 1 is provided below the transport conveyor 5 where the measuring means A and the work mounting means A are located.
Is provided.

The positioning means C of the transport pallet 1 will be described with reference to FIG. The positioning of the transport pallet 1 includes separating, stopping, and positioning the transport pallet 1. Positioning means C for positioning the carrier pallet 1 in both the measuring means A for measuring the minute hand pipe 2a which is the assembled part of the timepiece machine body 2 which is the assembled part and the work mounting means B which mounts the minute hand 3 which is the work. Are common.

A cylinder mounting plate 8 is arranged in parallel below the bearing mounting plate 6 fixed to the conveyor belt guide 5b with a space by a hexagonal column 7. The cylinder mounting plate 8 has four cylinders 9a, 9b, 9
c and 9d are attached, the cylinders 9a and 9b are for positioning the transfer pallet 1, the cylinder c is for separating the transfer pallet 1, and the cylinder d is for stopping the transfer pallet 1. Each cylinder 9a, 9b, 9c, 9d
Is timed to be projected by a sensor (not shown) that detects passage of the transport pallet 1 and confirms its existence.

The positioning pin 1 is attached to the rod tips of the cylinders 9a and 9b via cylinder joints 10a and 10b.
1a and 11b are connected to each other, and the positioning pins 11a and
The bearing 11b is rotatably supported by bearings 12a and 12b mounted on the bearing mounting plate 6. The transfer pallet 1 is provided with a pair of positioning bearings 1c and 1c (one not shown) that fits with the protruding positioning pins 11a and 11b. And the positioning pin 11
A top plate 13 is provided at the positioning position of the transport pallet 1 of the transport conveyor 5 against which the transport pallet 1 lifted by fitting the a and 11b with the pair of positioning bearings 1c and 1c.

Like the cylinders 9a and 9b, the cylinder 9
A stopper 14a is connected to the rod tip portion of c via a cylinder joint 10c, and the stopper 14a is pivotally supported by a bearing 12c attached to the bearing attachment plate 6. Similarly, the stopper 1 is attached to the rod tip of the cylinder 9d via the cylinder joint 10d.
4b are connected, and the stopper 14b is pivotally supported by a bearing 12d attached to the bearing attachment plate 6. At the lower part of the transport pallet 1, stoppers 14a and 14b protruding upward are provided with a stopper 1d. And 1 per degree under the transport pallet 1
When d is locked by the stoppers 14a and 14b, the transport pallet 1 is stopped at the positioning position, or separated from the state of being continuously transported before the positioning position. In the state where the stoppers 14a and 14b are engaged with the lower part of the transport pallet 1 at 1 degree, the transport pallet 1 is in a slipping state with respect to the transport belt 5a.

The measuring means A for measuring the height of the minute hand pipe 2a of the timepiece mechanical body 2 will be described with reference to FIGS. 3 and 4.

A touch-type scale 15 is adopted as a device used for the measurement, and the tip 15a of the touch-type scale 15 has a structure capable of expanding and contracting. The measurement is performed by contacting the minute hand pipe 2a of the mechanical body 2.

The measuring means A is arranged on the side of the assembly line via a mounting angle 16. The touch scale 15 is fixed by a clamper 17. Clamper 17
Is an XYZ table 19 via the θ direction adjusting means 18.
It is fixed to. The XYZ table 19 includes an X-direction sliding portion 19x, a Y-direction sliding portion 19y, and a Z-direction sliding portion 19.
z, each of which is a handle 19 for sliding in the X direction.
An attachment can be slid in the X, Y, and Z directions by the a, Y-direction sliding handle 19b and the Z-direction sliding handle 19c. Therefore, by combining the XYZ table 19 and the θ direction adjusting means 18, the touch-type scale 15
It is possible to easily adjust the measurement position and the measurement posture of.

Referring to FIG. 5, the work mounting means B for mounting the minute hand 3 on the minute hand pipe 2a of the timepiece mechanical body 2 will be described.

The work mounting means B is a minute hand 3 which is a work.
The YZ robot 20 is used as the transporting means. Y
The Z robot 20 is mounted on a robot mounting table 21 provided on the side of the assembly line. And Y-
The chuck 22 is attached to the chuck attachment portion 20a of the Z robot 20.
Is attached.

In the present embodiment, the minute hand 3 is supplied by the work supply means with the minute hand 3 aligned on the supply pallet (not shown).

FIG. 6 shows a circuit block diagram of the work assembling apparatus. The CPU 51 has a first storage circuit (RAM) 52 for temporarily storing measurement data and the like, and a second storage circuit (ROM) for storing a program for controlling the mounting depth of the work mounting means C and the like. 53 is connected.

Here, the initial adjustment of the work assembling apparatus of this embodiment will be described. First, before starting to assemble the works in succession, a reference sample component (not shown) at the work mounting position is mounted on the carrying conveyor 5 and carried. The reference sample part has the actual height of the minute hand pipe 2a and is used for the initial adjustment of the work assembling apparatus, and the minute hand pipe obtained by the work measuring means A measuring the reference sample part. It is used to teach the optimum mounting height position of the minute hand 3 to the work mounting means B based on the height position data of 2a. It should be noted that the reference sample parts may be those manufactured as adjustment jigs, or the assembled parts themselves in which the timepiece mechanical body 2 which is the assembled parts are mounted on the pallet 1 are used. I don't care. When the teaching of the measurement position of the work to the work mounting means B with respect to the measurement data of the work measuring means A is finished, the initial adjustment of the work assembling apparatus is completed. Therefore, the height of the minute hand pipe 2a of the timepiece mechanical body 2 mounted on the conveyed pallet 1 is measured by the work measuring means A.
Is measured, and the mounting height is determined by determining whether the mounting position is higher or lower than the previously measured reference sample part (teached position), and the minute hand 3 that is the work is mounted by adjusting. Will be done.

Next, the assembling operation of the work in this embodiment will be described.

The transport pallet 1 on which the timepiece machine body 2 is mounted is continuously transported on the transport conveyor 5 of the assembly line. After the first transport pallet 1 has passed over the stopper 14a at the location where the measuring means A is arranged, the subsequent transport pallets 1 are separated by 1d each time the stopper 1a is locked by the stopper 14a. When the first transfer pallet 1 is transferred to the positioning position, the stopper 1
1d is locked by 4b and stopped, and a slipping state occurs on the conveyor belt 5a of the conveyor 5. This time,
The transport pallet 1 is pushed up by the positioning pins 11a and 11b and abuts on the top plate 13, whereby the transport pallet 1 is lifted from the transport conveyor 5 and positioned.

The tip 15a of the touch type scale 15 of the measuring means A extends with respect to the timepiece mechanical body 2 on the carrier pallet 1 which is positioned at the measuring position of the measuring means A, and The height of the minute hand pipe 2a is measured.

When the measurement is completed, the measuring means A sends the measurement data to the CPU 51. The CPU 51 performs processing by using both the first storage circuit (RAM) 52 and the second storage circuit (ROM) 53, and stores the minute hand 3 based on the measured height of the minute hand pipe 2a of the timepiece mechanical body 2. The work mounting means B is operated so that the work mounting means B is mounted at the mounting height.

After the height of the minute hand pipe 2a of the timepiece machine body 2 has been measured by the measuring means A, the transport pallet 1 is transported to the work mounting means B after the stopper 14b is opened.

The transport pallet 1 is positioned at the work mounting means B in the same manner as it is positioned at the measuring means A. The same applies to the other cases, and when the next transport pallet 1 is transported while the previous transport pallet 1 is positioned, the stopper 14a causes the standby state. The work hand mounting means B mounts the minute hand 3 at the mounting height of the minute hand 3 based on the height of the minute hand pipe 2a of the timepiece mechanical body 2 measured by the measuring means A.

The carrier pallet 1 on which the timepiece mechanical body 2 having the minute hand 3 mounted is mounted is transported downstream in the assembly line with the positioning pins 11a and 11b opened and the stopper 14b opened.

Thereafter, similarly, the minute hand pipe 2 of the timepiece mechanical body 2
The work of attaching the minute hand 3 to a is continued.

The height of the assembled portion 2a of the assembled component 2 of the present embodiment and the work 3 on the assembled portion 2a are measured.
Regarding the combination with the mounting work of No. 3, if the work 3 is mounted on the component 2 to be conveyed according to the order of the measurement data measured by the measuring unit A, the work 3 is conveyed between the measuring unit A and the work mounting unit B. As long as the pallet 1 is not pulled out, erroneous mounting work based on other measurement data will not be performed, which is all right.

According to the present embodiment, as long as the common work mounting means B can be used in the automatic assembly line, when the model of the parts to be assembled 2 or the model of the work 3 to be assembled is changed. Assembling is possible without adjusting the work assembling device each time. Also, the parts to be assembled 2
Work piece 3 can be instantly responded to individual differences in the assembled part 2a of
It is possible to assemble without causing mounting failure.

[0033]

According to the configuration of the present invention, after the assembled portion of the assembled component is measured, the mounting height is determined based on the measurement result and the work is mounted, so that the assembled component When the model or the model of the work is changed, it is possible to continuously perform the assembly work without interrupting the assembly work and adjusting the work assembling apparatus each time.
Further, it is possible to immediately deal with individual differences existing in the parts to be assembled itself, and it is possible to perform assembly without causing defective mounting of the work due to individual differences existing in the parts to be assembled itself.

[Brief description of drawings]

FIG. 1 is an overall front view of a work assembling apparatus of the present invention.

FIG. 2 is a diagram showing a minute hand pipe and a minute hand of a timepiece mechanical body incorporated in a timepiece frame body which is a target work in the embodiment of the present invention.

FIG. 3 is a front view showing the measuring means of the work assembling apparatus and also showing the details of the positioning means of the transfer pallet.

FIG. 4 is a side view of a measuring unit of the work assembling apparatus.

FIG. 5 is a front view showing a work mounting means of the work measuring means.

FIG. 6 is a circuit block diagram of a work assembling apparatus.

[Explanation of symbols]

 1 Transport Pallet 2 Assembled Parts (Watch Machine) 2a Assembled Part (Minute Hand Pipe) 3 Work (Minute Hand) 51 Judgment Means (CPU) A Measuring Means B Work Attachment Means

Claims (2)

[Claims] 1. The height of an assembled portion of an assembled component which is mounted on a transport pallet and is transported on an assembly line is measured by a measuring means, and the work is based on the measurement result obtained by the measuring means. The mounting height of the workpiece is determined, and the workpiece is mounted on the assembled portion via the workpiece mounting means. 2. An assembly line for carrying a carrying pallet on which the parts to be assembled are placed, and a height of an assembled part of the parts to be assembled mounted on the carrying pallet, which is provided above the assembly line. Measuring means for measuring; determining means for determining the mounting height of the workpiece based on the height of the assembled part of the assembled part measured by the measuring means; and receiving the output of the determining means, A work assembling apparatus comprising work mounting means for mounting a work on the assembly target component.