JP2000047705A - Operation instruction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce misoperation in an assembling line wherein products are completed by manually fitting many kinds of screws. SOLUTION: Operation information 101 wherein the kinds, fitting positions and the necessary quantities of screws to be used in accordance with an assembly procedure for a product are registered and operation instruction information 102 wherein operation information 101 for every type of product is registered, are stored previously in a control part 1 and a screw supply part 3 discharges necessary screws under the control of the control part 1. The number of the screws is counted by a sensor 6, and a torque driver 9 outputs a clamping completion signal when prescribed clamping torque is reached, while the torque driver 9 where clamping torque corresponding to the screw kind is set is powered on to perform clamping operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work instruction device for instructing an assembling procedure of a product to be assembled by screwing screws to predetermined positions of a plurality of parts, and in particular, to work instructions and means for supplying screws necessary for the operation. And a work instruction device comprising the same.

[0002]

2. Description of the Related Art Generally, a production line having a different specification for each product such as a general-purpose computer is constructed by sequentially assembling a plurality of basic frames, for example, a frame for mounting a power supply unit, a memory unit, a storage unit, and the like. Assembly work is being performed to fix the screws according to the specifications.

A work instruction for assembling a product having different specifications for each product is disclosed in, for example, Japanese Patent Laid-Open No. 4-28305.
As described in Japanese Patent Publication No. 8 (1994), the contents of work instructions are stored in advance in a storage means such as an ID plate, and this storage means communicates with a control device or a central processing unit of each assembling process to execute a corresponding process. There has been proposed a system for giving a work instruction according to a worker.

[0004]

In the above-mentioned system using the ID plate according to the prior art, it is necessary for an operator to select an assembly part and take out a required number of parts in accordance with the display contents of a work instruction. There was a problem that there was a possibility that it was not installed or that there was a work leak. Further, the conventional system relies on manual input for confirming the contents of the work, and there is a possibility that an erroneous input is made to the system, and that the work which has not been completed is erroneously managed as being completed. Further, in an assembly line in which a variety of screws are manually attached to complete a product, there have been problems such as erroneous work due to a mistake in screws, unattachment, and loosening of screws due to tightening outside of a specified torque.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned disadvantages of the prior art, and to instruct an operator on an assembly procedure in an assembly line in which a variety of screws are mounted to complete a product, and further necessary for the operation. An object of the present invention is to provide a work instruction device capable of supplying screws and performing work confirmation.

[0006]

According to the present invention, there is provided a method for assembling a product comprising a plurality of parts by screwing a predetermined type of screw into a predetermined position of the plurality of parts. In the work instruction device that instructs according to
A control unit having storage means for storing work information in which the types and mounting positions and the required number of screws used in accordance with product assembly procedures and work instruction information in which the work information is registered for each of a plurality of products; A screw supply unit that stores a screw of a type, and discharges a screw of a type based on work information corresponding to a product specified by an instruction of the control unit to a tray, wherein the control unit includes The first feature is that the work information including the type, the mounting position, and the required number is displayed to the operator, and the screw supply unit is instructed to discharge the required number of required screws.

Further, according to the present invention, in the work instruction device having the above-mentioned feature, a plurality of torque drivers for setting a tightening torque according to a plurality of screw types are provided, and the tightening torques of the screws supplied from the screw supply unit are the same. A second feature is that only the driver can be used, and the plurality of torque drivers output a tightening completion signal to a control unit when a specified tightening torque is reached, and the control unit determines a predetermined number of screws. When the tightening completion signal is counted, the work information including the types and mounting positions and the required number of screws of the products to be assembled according to the following assembling procedure is displayed to the operator, and the necessary screws are removed. A third feature is to instruct the screw supply unit to discharge a required number of pieces.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a work instruction device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram for explaining the overall configuration of the work instruction device according to the present embodiment, FIG. 2 is a diagram for explaining the work instruction information according to the present embodiment, and FIG. 3 is a diagram for explaining the work information according to the present embodiment. FIG. 4 is a diagram for explaining a flow for supplying a screw and giving a work instruction according to the present embodiment, and FIG. 5 is a diagram for explaining a work instruction screen according to the present embodiment.

As shown in FIG. 1, the work instruction apparatus according to the present embodiment stores work instruction information 102 for each product and a work information management number 101 for each of a plurality of products, which will be described later, in a storage unit 10 and a predetermined program. A control unit 1 that operates and has a display unit, and a screw discharge unit 4 that stores a plurality of various types of screws and stores a specified number of screws specified by an instruction from the control unit 1
A screw supply control unit 3 for discharging the screws, a discharge number detection sensor 6 for optically detecting the number of screws discharged to the screw discharge unit 4 and supplying the same to a tray 7, and a plurality of torques set in advance. A power supply unit 12 for selectively supplying power to the drivers 9a to 9c and a completion signal 11 indicating that the driver torque has reached a predetermined value due to the tightening by the torque drivers 9a to 9c and screw tightening has been completed are input. It includes a tightening completion signal receiving section 13 and a torque driver control section 8 for controlling these.

The work instructing apparatus according to the present embodiment defines work information including a procedure necessary for an assembling work and a screw type in accordance with a product type name of various specifications specified in advance. As shown in FIG. 3, the information includes an assembling order 311 according to a product assembling procedure, and screw mounting position information 312 indicating a screw mounting location in this order 311.
And screw type information 313 indicating the type of screw to be used;
Screw quantity information 314 indicating the number of screws to be used, a torque driver number 315 having the same setting as the screw tightening torque indicated by the screw type information 313 among a plurality of torque drivers for which screw tightening torques have been set, Work 316). This work information is, as shown in FIG.
A number is assigned as the work information management number 212 every time.

In the work instruction apparatus thus configured, as shown in the flow of FIG. 4, when the manager inputs the product model name to the control section 1 (step 51), the control section 1 causes the work instruction information 102 to be displayed. The product type name 211 is compared with the input product type name, and the matched work information file 101 is read (step 52). First, the screw type information 313 of the work information 101 and the screw A discharge control signal for the quantity information 314 is sent (step 53).
Accordingly, the screw supply control unit 3 discharges a screw corresponding to the screw type 313 from the screw discharge unit 4 instructed by the discharge control signal from the control unit 1, and disposes the discharged screw by the screw discharge tray 5 by the screw shooter 5. 7 and supplied to the operator (step 63).

At this time, the number-of-discharges detecting sensor 6 optically or mechanically counts the number of screws discharged from the screw discharging unit 4 and reports the number of discharged screws to the screw supply control unit 3. The screw supply control unit 3 compares the screw discharge number counted by the sensor 6 with the number indicated by the screw quantity information 314, and reports a match or mismatch signal to the control unit 1 (step 54). The control unit 1 displays the screw mounting position information 312, the screw type information 313, the screw quantity information 314, and the work content information 316 of the work information 101 on the display unit only when the matching information is received (step 5).
5). Further, the control unit 1 selectively supplies power to the torque drivers 9a to 9c to be used in accordance with the discharged screw types, and sets the torque drivers to be usable (step 5).
6).

An image 60 displayed on the display unit is, for example, as shown in FIG.
, The name of a worker 63, and an overall diagram 66 representing the entire product
And a partial view 67 indicating the work position in the overall view 66, and a detailed component view 72 in which the partial view 67 is enlarged.
And a work position indicating area 73 indicating a screw tightening position and a screw to be used according to the work procedure in the part drawing 72, and a procedure number area 64 for displaying the order of the work in a reversed image 65 or the like (shown by oblique lines in the figure). And an instruction area 70 for displaying the order of the operation instructions and the contents of the operation in characters.
In the example shown in FIG. 5, the position shown in the partial view 67 at the upper left of the front in the overall view 66 showing the skeleton frame of the product is the work position. The screw tightening work position at this time is the upper left position of the part indicated by the work position indicating area 73, the screw type is M4, and the procedure number area indicates that this work is the first work. The image is displayed by 64 images 65 and an instruction area 70. The work position indicating area 73 indicated by the dashed line sequentially moves the screw tightening position (indicated by a circle in the figure) as the operation proceeds, and the position of the image 65 in the procedure number area 64 and the contents of the instruction area 70 are updated. It is configured like this. Also, areas 75 and 76 indicate whether or not the screw tightening at the point where the work was performed by the torque detection described later is passed.

Now, the operator performs a screw tightening operation at the designated place using the discharged screw and the energized torque driver according to the image 60 displayed on the display section (step 57). Here, even if the operator attempts screw tightening work using an incorrect torque driver, the driver is not energized and cannot be used, so that the operator can be alerted. When the tightening operation is completed, the torque driver 9 detects that the torque has reached a predetermined value, and outputs a tightening completion signal 11 to the torque driver control unit 8.
The receiving unit 13 counts the received tightening completion signal, compares it with the screw tightening number specified in the screw quantity information 313 of the work information 101, and completes the predetermined screw tightening operation. After confirming that the process has been performed (step 58), the screw control unit 3 sends the screw type information 313 of the work information 101 and the discharge control signal of the screw quantity information 314 to the screw supply control unit 3 according to the assembly procedure 311. The control unit 1 repeats this operation until the entire process is completed, and ends the operation (step 62).

As described above, the work instructing device according to the present embodiment can prevent a screw from being forgotten to be tightened by automatically supplying a necessary number of screws to a work place, and can perform a tightening operation with a predetermined torque. Become. That is, according to the present embodiment, the work information in which the type and mounting position of the screw used according to the product assembling procedure and the required number are registered,
A control unit that stores work instruction information in which the work information is registered for each product type name, a screw supply unit that discharges a screw to a tray based on the work information under the control of the control unit, A sensor that reads the number of screws and a torque driver that outputs a tightening completion signal when the specified tightening torque is reached. The control unit reads the work information of the product to be assembled and displays the work position and other information on the display unit. At the same time, a required number of screws are discharged from the screw supply unit and supplied to the operator's hand. In addition, the number of screws discharged from the supply unit is counted by a sensor attached to the discharge tray, compared with the required number of work information, and only when the number of screws required for assembly work is supplied, according to the type of screw Power is supplied to the torque driver for which the tightening torque has been set so that the tightening work can be performed. Further, when the tightening completion signal of the torque driver is counted and coincides with the number of supplied screws, the next work place is displayed and the screws are supplied.

Therefore, according to this embodiment, the screws required by the operator are automatically supplied to the operator to prevent the use of the wrong screw, and the power is supplied only to the torque driver corresponding to the required screw. Prevents screw tightening due to erroneous torque by enabling use, further counts the tightening completion signal from the torque driver, detects the completion of a predetermined number of screw tightening, detects the completion of a predetermined number of work, and tightens the screw Leakage can be prevented.

Although the work instruction device according to the above-described embodiment has been described as an independent stand-alone type, the present invention is not limited to this. For example, a plurality of work instruction devices according to the above-described embodiment are installed according to the work process. Then, the control unit of each work instructing device is connected to a host computer that stores production plans of a large number of product types, and each work instructing device operates according to instructions from the host computer to perform work instructing information and work information of the assembled product in the process. Network configuration that manages work instructions and supply of screws or confirmation of screw tightening quantity by torque driver based on assembly order, screw mounting position information, screw type information, screw quantity information, torque driver number, work information, etc.) You may do it.

Further, the work instruction device according to the present invention can be represented as the following embodiment. <Embodiment 1> In the assembling work performed manually, the screw information in which the type, the mounting position, and the required number of screws used according to the product assembling procedure are registered, and the screw information is registered for each product type name. And a screw supply unit for discharging screws to a tray based on the screw information by a control signal from the control unit, and the personal computer stores the screw information of the product to be assembled. A work instruction device for displaying a work instruction on a reading display and, at the same time, supplying a screw to a worker by sending a control signal to discharge a required number of screws to a screw supply unit. <Embodiment 2> In the work instruction device of Embodiment 1,
It consists of a sensor that reads the number of ejected screws, counts the number of screws ejected from the supply unit with a sensor attached to the ejection tray, and compares it with the required number of screw information, so that screws can be assembled. A work instruction device for displaying a work place only when a required number of pieces are supplied. <Embodiment 3> In the work instruction device of Embodiment 1,
A plurality of torque drivers for setting the tightening torque according to the type of screw are provided, and the tightening torque of the supplied screw and the tightening torque set in the torque driver are supplied to only the same torque driver so that they can be used. Work instruction device characterized by things. <Embodiment 4> In the work instruction devices of Embodiments 1 and 3, the torque driver outputs a tightening completion signal to a personal computer when the specified tightening torque is reached, and the personal computer
A work instruction device characterized in that the tightening completion signal is counted and, when the number of supplied screws coincides with the number of supplied screws, a display of the next work place and a supply control signal of the screws are transmitted.

[0019]

As described above, according to the present invention, there is provided a control having a storage means for storing screw information in which the type and number of screws to be used are registered and work instruction information in which the screw information is registered for each of a plurality of products. And a screw supply unit that stores a plurality of types of screws and discharges a specified type of screw to a tray. The control unit controls the type of screw, the mounting position, and the required number of screws of a product to be assembled. The screw information is displayed to the operator, and the screw supply unit is instructed to discharge the necessary number of necessary screws, thereby instructing the operator on the assembling procedure and supplying the screws necessary for the operation. In addition, the work can be confirmed, thereby preventing erroneous selection and non-attachment of the screw. Further, by using only the torque driver set to the torque value of the screw to be tightened, a work error can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the overall configuration of a work instruction device according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining work instruction information according to the embodiment;

FIG. 3 is a view for explaining work information according to the embodiment;

FIG. 4 is a view for explaining a flow for supplying a screw and issuing a work instruction according to the embodiment;

FIG. 5 is an exemplary view for explaining a work instruction screen according to the embodiment;

[Description of Signs] 1: Control unit, 2: Bar code reader, 3: Screw supply control unit, 4: Screw discharge unit, 5: Screw shooter, 6: Discharge detection sensor, 7: Screw discharge tray, 8: Torque driver control Part, 9: torque driver, 10: database,
11: Tightening completion signal, 12: Power supply for torque driver.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshihiro Nagatani 810 Shimoimaizumi, Ebina-shi, Kanagawa F-term in the General-purpose Computer Business Division, Hitachi, Ltd. 5H215 AA06 BB09 CC07 CC09 CX05 CX06 GG05 JJ14 9A001 CZ08 JJ46 JZ48 KK54

Claims (3)

[Claims] 1. A work instruction device for instructing assembly of a product including a plurality of parts in accordance with a procedure by screwing a predetermined type of screw into a predetermined position of the plurality of parts in accordance with a procedure. A control unit having storage means for storing work information in which types of screws to be used, mounting positions, and necessary numbers are registered, and work instruction information in which the work information is registered for each of a plurality of products, and a plurality of types of screws are stored. A screw supply unit configured to discharge a screw of a type specified by work information corresponding to a product specified by an instruction of the control unit to a tray; A work instruction device, which displays work information including a position and a required number to a worker and instructs a screw supply unit to discharge a required number of required screws. 2. A method according to claim 1, further comprising the step of: providing a plurality of torque drivers, each of which sets a tightening torque corresponding to a plurality of screw types, so that only a screw driver having the same tightening torque of the screws supplied from the screw supply unit can be used. The work instruction device according to claim 1, wherein 3. When the plurality of torque drivers output a tightening completion signal to a control unit when a specified tightening torque is reached, and the control unit counts the tightening completion signal for a predetermined number of screws. In addition, the work information including the types and mounting positions and the required number of screws of the products to be assembled according to the following assembling procedure is displayed to the operator, and the screw is supplied so that the required number of screws are discharged. The work instruction device according to claim 1, wherein the instruction is given to a unit.