JPH10173396A - Method of moving feed table and components mounting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen mechanical vibrations due to moving and smooth the moving by moving one feed table prior to other feed table, so as to make a specified space between them in the next step, when both tables approach each other with a space less than a specified distance. SOLUTION: From information obtd. at S1, in each of N-1 number of steps, whether the space between a chucking table and upchucking table is less than a specified distance is judged (S4). If less than a specified distance from the judged result, the unchucking table is moved in advance to a position having a space of at least a specified distance even in a step where both tables most close approach, from component-mounting information, by requiring several steps up to the most close of approach step (S8).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for moving a supply table provided in an electronic component mounting apparatus for automatically mounting electronic components on a circuit board, and a component mounting apparatus for executing the moving method.

[0002]

2. Description of the Related Art A general configuration of a conventional component mounting apparatus for mounting electronic components on a circuit board is shown in FIG. 6, and a conventional electronic component mounting apparatus for mounting electronic components on a circuit board will be described with reference to FIG. The component supply method will be described. The electronic component mounting apparatus 51 roughly includes a mounting machine main body 1 and a component supply device 2. The mounting machine main body 1 includes a circuit board support device 3, a rotary head unit 4, a suction mounting head 5 mounted around the rotary head unit 4 at equal intervals, and the like. The component supply device 2 includes a first supply table 7 and a second supply table 8 movably disposed on the guide rail 6. The operation of the rotary head unit 4 including the circuit board supporting device 3, the suction mounting head 5, the first supply table 7, and the second supply table 8 is controlled by the control device 18, respectively. Further, the component supply device 2 includes the two supply tables of the first supply table 7 and the second supply table 8 as described above, but may include an arbitrary number of supply tables as needed. It is also possible. One or a plurality of component supply units 9 are mounted on these supply tables 7 and 8, respectively, and the electronic components are loaded in separate component supply units 9 for each type. Also, these supply tables 7, 8
Can independently reciprocate on the guide rail 6, and the component supply device 2 moves the supply table 7 or the supply table 8 so that the component supply unit 9 on which the desired electronic component is mounted is located at the component holding position 10. Move. The electronic component is sucked and held by the suction mounting head 5 at the component holding position 10, and is conveyed onto the circuit board support device 3 by the operation of the rotary head unit 4. At the same time, the circuit board 11 supported by the circuit board supporting device 3 is positioned at a desired position by the operation of the circuit board supporting device 3. Then, the electronic component sucked by the suction mounting head 5 is mounted at a mounting position on the circuit board 11.

Next, a specific example of a method of controlling the movement of the supply tables 7 and 8 in the component supply device 2 will be described with reference to FIG. First, the structure of the drive units of the supply tables 7 and 8 will be described. A screw shaft 12 is arranged and fixed below the supply tables 7 and 8 along the moving direction thereof. A screw shaft 12 is provided on the lower surface side of each of the supply tables 7 and 8.
And hollow motors 14 and 14 for driving the nut 13 to rotate about the screw shaft 12.
And each is installed. In addition, each hollow motor 14, 14
Has cylindrical rotors 16, 16 concentrically with the screw shaft 12 and is supported inside stators 15, 15 fixed to the lower surfaces of the supply tables 7, 8. The rotors 16 are rotatable with respect to the stators 15 via the bearings 17. Further, each rotor 16, 16 is connected to a nut portion 13, 13, respectively. Further, each of the hollow motors 14 is connected to a control device 18, respectively. Accordingly, the nut portion 13 is rotated by the hollow motor 14 rotating the rotor 16 under the control of the control device 18, and the nut portions 13 are screwed to the screw shaft 12. It can reciprocate independently along each rail 6.
The amount of movement of the supply tables 7 and 8 can be determined, for example, by connecting an encoder to the hollow motor 14 and encoding the rotation of the rotor 16 or by disposing an appropriate sensor along the screw shaft 12 and using the sensor. It is determined by detecting the positions of the supply tables 7 and 8.

[0004] The supply table 7 having such a structure,
8, when there are many types of electronic components used for the production of the circuit board 11, the component supply units 9 are distributed and mounted on the supply tables 7 and 8. In this case, it is necessary to alternately move the supply tables 7 and 8 to the component holding position 10 according to the electronic components mounted on the circuit board 11 for use. Hereinafter, such an operation is referred to as a transfer operation. In order to realize a high-speed component mounting operation even when such a transfer operation is performed, it is necessary to supply components at a higher speed. For this purpose, a supply table other than the supply table 7 equipped with the component supply unit 9 in which the component is held by the suction mounting head 5 disposed at the component holding position 10, for example, the supply table 8 shown in FIG. 6 also comes. It is necessary to approach the supply table 7 where components are currently held so as to minimize the movement distance to the component holding position 10 to be held.

A conventional movement control method for the supply tables 7 and 8 associated with such alternate use of the supply tables 7 and 8 will be described with reference to FIGS. The control device 18 of the electronic component mounting apparatus 51 includes the component supply units 9.
Information about the types of electronic components provided in the computer, component mounting information indicating the relationship between each process and the types of electronic components mounted in the process, and the like are supplied in advance, and the control device 18 supplies the information based on these information. The operation of the tables 7 and 8 is controlled. Note that the above-described process means that the electronic component holding and holding one electronic component at the component holding position 10 from the time when the supply table 7 or 8 starts moving to the component holding position 10 is the mounting position of the circuit board 11. Refers to the operation up to mounting on the device, and this series of operations is regarded as one process. In the following description of the present specification, one supply table having a component supply unit 9 in which an electronic component is held at the component holding position 10 in each of the above steps will be referred to as a suction table. The other supply table adjacent to the one supply table without performing the supply is referred to as a non-sucking table. In addition, because of the mechanism, each of the supply tables 7 and 8 cannot approach an interval shorter than a predetermined distance, and therefore, it is necessary to always maintain an interval longer than the predetermined distance. Further, due to a control problem, if the movement of both of the supply tables 7 and 8 is not completed, the suction mounting head 5 cannot suction the electronic component at the component holding position 10, and
Therefore, the unadsorbed table is not allowed to exceed the moving amount of the adsorbed table so as not to hinder the production of the circuit board 11.

First, at step 1 (indicated by “S” in the figure) 1 of FIG. 8, the control device 18 executes a process to be executed next to the currently executed current process based on the above-mentioned component mounting information. Information on component mounting in a predetermined number of steps (N, where N is an integer of 2 or more) including the next step, specifically, component supply arranged in the component holding position 10 in each of the N steps. Information about the unit 9 and information about the supply tables 7 and 8 having such a component supply unit 9 are acquired. In step 2, the movement position of the suction table at the predetermined number of times is predicted based on the information acquired in step 1, and based on the prediction, the supply table serving as the suction table in the next process is immediately after the current process. It is determined whether or not to move to. As a result of the judgment,
If there is no movement of the suction table, the process proceeds to step 7 and the current component supply is continued in the next process. For example, FIG.
As shown in part I of FIG. 7, in the program step 0, the supply table 7 corresponds to the suction table, and in the program step 1 corresponding to the next process, the supply table 7 corresponds to the suction table. If it is determined in the program step 1 corresponding to the next process that the supply table 7 has not moved,
The same component supply as that in the current program step 0 may be performed. On the other hand, as a result of the determination in step 2,
If the suction table has been moved, the process proceeds to step S3.

[0007] In step 3, it is determined whether or not the distance between the suction table and the non-suction table adjacent to the suction table is smaller than the predetermined distance by moving the suction table in the next step. If the result of this determination is that the distance between the suction table and the non-suction table is less than the predetermined distance, the process proceeds to step 6 where the suction table and the non-suction table are forcibly prevented from contacting each other. Then, the non-sucking table is also moved to secure the predetermined distance. For example, as shown in part II of FIG. 9, in the program step i which is the current process, the supply table 7 corresponding to the suction table and the supply table 8 corresponding to the non-suction table have an interval of the predetermined distance. I have. However, in the program step i + 1 corresponding to the next step, the supply table 7 corresponding to the suction table moves rightward in the drawing. The interval is smaller than the above-mentioned predetermined distance.
Therefore, as shown in the program step i + 1, the supply table 8 corresponding to the unsucked table is forcibly moved rightward in the program step i + 1 so that the interval between them is equal to or longer than the predetermined distance. On the other hand, if the result of determination in step 3 is that the suction table and the non-suction table maintain an interval equal to or longer than the predetermined distance, the process proceeds to step 4.

In step 3, since the determination in the next step has been completed, in step 4, based on the information obtained in step 1, N-1 times in which the next step is subtracted from the N times. In each step, it is determined whether or not the distance between the suction table and the non-suction table is smaller than the predetermined distance. If it is determined that the distance between the two is less than the predetermined distance, step 5
Move to. The operation of step 5 will be described with reference to part III of FIG. In this example, N corresponds to 4 from program step j to program step j + 4 corresponding to the next process. In step 4, the determination is made from program step j + 2 to program step j + 4 corresponding to the next step, which is the next step after the next step. If the supply table 8 corresponding to the non-sucking table is not moved in the program step j which is the current process, as shown in the drawing, in the program step j + 4, the supply table 7 corresponding to the suction table in the program step j + 4 is used. Comes into contact with the supply table 8. or,
Up to the program step j + 3, the supply table 7 and the supply table 8 maintain an interval of the predetermined distance or more. Therefore, the supply table 8 corresponding to the unsucked table is set for each process in the program steps j + 1 to program j + 3. It is useless to move.
Therefore, in this case, only the supply table 7 corresponding to the suction table is moved. Then, the process proceeds to step 7. On the other hand, if it is determined in step 4 that the distance between the two is not less than the predetermined distance,
Move to step 6.

In step 6, the non-adsorption table is moved so as to approach the adsorption table. This will be described with reference to, for example, the IV section in FIG. In this example, N corresponds to 4. The program step k + 2, which is the next step, which is the next step after the next step, and the program step k +
Since the distance between the suction table and the non-suction table does not become smaller than the above-mentioned predetermined distance even up to 4, the non-suction table is moved so as to approach the suction table at the above-mentioned predetermined distance which is the minimum distance as shown in the figure.

Conventionally, by performing the above-described control, the above-described transfer operation in which the supply table on which the component supply unit 9 required for component supply is switched is smoothly and quickly performed, and the above-described non-sucking operation is performed. By eliminating useless movement of the table, the vibration of the entire component mounting apparatus has been reduced.

[0011]

However, in the above-described conventional supply table moving method, the program step j is performed as described above in step 5 and as shown in part III of FIG.
Even though there is a timing at which the unsucked table can move during → j + 1 → j + 2 → j + 3, the unsucked table is maintained in a stopped state. The suction table must be moved large. As a result, in the transition from program step j + 3 to j + 4, both the suction table and the non-suction table move, so that there is a disadvantage that mechanical vibration during operation increases. That is, in the component supply device 2 illustrated in FIG. 7, vibration generated by driving the hollow motor 14 is transmitted to the screw shaft 12. Therefore, when the supply table 7 and the supply table 8 are moved at the same time, the plurality of hollow motors 14 must be driven at the same time, and as a result, a large vibration is generated in the screw shaft 12. The vibration of the screw shaft 12 is transmitted to the supply tables 7 and 8 attached thereto, and further vibrates the component supply unit 9 and the electronic components mounted thereon. As a result, the failure rate at which the suction mounting head 5 picks up the component taken out from the component supply unit 9 to the component holding position 10 increases, which leads to a reduction in production efficiency due to a waste of time for repair and a waste of electronic components. Occurs, and the mounting accuracy of the electronic component is deteriorated due to the vibration of the entire component mounting apparatus. The present invention has been made in order to solve such a problem, and by moving a supply table that does not perform component supply more efficiently, movement of the supply table that reduces mechanical vibration caused by movement of the supply table. It is an object of the present invention to provide a method and a component mounting apparatus for executing the moving method.

[0012]

According to a first aspect of the present invention, there is provided a method of moving a supply table, the method comprising: moving a plurality of supply tables each including a component supply unit having components along a moving direction of the supply table. A component supply device that is arranged side by side and moves the supply table in the moving direction so that a desired component supply unit is located at a component holding position where components of the component supply unit are held; And a component holding device that mounts the held component on the mounted object. In the method of moving the supply table, the component mounting information describes the mounting order of the component on the mounted object. Next, the next step of holding the component at the component holding position and at least one step subsequent to the next step, wherein the component is held at the component holding position. In the next step, the movement position of one supply table on which the component supply unit in which the component is held is mounted and another supply table adjacent to the one supply table is predicted, and based on the prediction, the component holding is performed. It is determined whether one supply table to be performed and the other supply table approach a distance less than a predetermined distance in the next process, and when it is determined that there is no approach to a distance less than the predetermined distance, the prediction is performed. Based on the next step, it is determined whether there is an approach to a distance less than the predetermined distance,
When it is determined in the subsequent step that there is an approach to a distance less than the predetermined distance, the one supply table where the component holding is performed and the other supply table are separated by the predetermined distance or more in the subsequent step. Another supply table is moved efficiently without waste.

In a component mounting apparatus according to a second aspect of the present invention, a plurality of supply tables each having a component supply unit having components mounted thereon are arranged in parallel along the moving direction of the supply table. A component supply device that moves the supply table in the moving direction so that the desired component supply unit is located at a component holding position where the components of the supply unit are held; and a component mounted at the component holding position. And a component holding device that mounts the component on the body, and then holds the component at the component holding position based on component mounting information describing the order of mounting the component on the mounted body. In the next step and at least one of the steps following the next step, in the next step of holding the component at the component holding position, a component supply unit for holding the component is mounted. One supply table and the movement position of another supply table adjacent to the one supply table are predicted, and based on the prediction, one supply table in which the component holding is performed and the other supply table are the next supply table. In the process, determine whether to approach a distance less than the predetermined distance,
When it is determined that there is no approach to a distance less than the predetermined distance, the presence or absence of approach to a distance less than the predetermined distance is further determined in the next step based on the prediction, and in the next step, the distance to the distance less than the predetermined distance is determined. When it is determined that there is an approach, the other supply table is efficiently moved without waste so that the one supply table in which the component holding is performed and the other supply table are separated by the predetermined distance or more in the subsequent process. A control device is provided.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for moving a supply table and a component mounting apparatus for executing the moving method according to an embodiment of the present invention will be described below with reference to the drawings. The same reference numerals are given to the same components in each drawing including FIGS. 6 to 9 used in the above description, and description thereof will be omitted. Further, one embodiment that fulfills the function of the component holding device corresponds to the rotary head unit 4. In addition, as shown in FIGS. 3 and 4, the component mounting apparatus 101 of the present embodiment is provided with a control device 110 instead of the control device 18 provided in the conventional component mounting device 51. Other components of the component mounting apparatus 101 are the same as those of the component mounting apparatus 51 described above. Therefore, the operation of the component mounting apparatus 101 of the present embodiment is the same as the operation of the component mounting apparatus 51 described above, except for a method of moving the supply table, which will be described later, which is controlled by the control apparatus 101. Therefore, in the following description, the control device 101
Only the method of moving the supply table, which is controlled by, will be described.

In the above-described conventional method of moving the supply table, since the non-sucking table does not operate despite the timing at which the non-sucking table can be moved, there is a situation where the non-sucking table must be largely moved at a later stage. Can occur. As a result, the mechanical vibration during operation is increased due to the large movement of both the suction table and the non-suction table, and as a result, component suction errors, component waste, time consumption for repair, deterioration of mounting accuracy, etc. Problem arises. That is, the stop state for avoiding the unnecessary movement of the non-sucking table results in an inefficient stop. In the present embodiment, attention is paid to this point, and in order to avoid as much as possible that the unsucked table moves in one process, if there is a timing at which the unsucked table can be moved, the above-mentioned component mounting information By moving the non-sucking table ahead of the non-sucking table to a position to which the non-sucking table should be moved based on a time including a plurality of steps, mechanical vibrations caused by the supply table are intensively generated in one step. The effect of dispersing the mechanical vibration into a plurality of steps can be obtained.

Referring to FIG. 1 and FIG.
A method of moving the supply table performed under the control of No. 01 will be specifically described. In FIG. 1, the operations from step 1 to step 4 and the operation in step 7 are the same as those in FIG.
Are the same as those in steps 1 to 4 and step 7 described with reference to FIG. Therefore, the operations in Steps 8 and 9 shown in FIG. 1 are characteristic operations in the supply table moving method in the present embodiment, and the operations in Steps 8 and 9 will be described in detail below. As described above, in step 4, based on the information acquired in step 1, the distance between the suction table and the non-suction table is further reduced in each of N-1 times in which the next process is subtracted from the N times. Is determined to be less than the predetermined distance. If it is determined that the distance between the two is less than the predetermined distance, the process proceeds to step S8.

In step 8, based on the component mounting information, a plurality of steps up to the step of approaching the suction table and the non-suction table to a position having at least the predetermined distance are performed even in the step of approaching the suction table most. In short, the non-adsorption table is moved in advance. This will be specifically described with reference to the V portion shown in FIG. In the V section, the N times correspond to four times from the program step m + 1 to the program step m + 4. The next step corresponds to the program step m + 1, and the next step corresponds to the program step m + 2. Therefore, “N−1 times” in step 4 means that from program step m + 2 to program step m + 4, excluding program step m + 1 corresponding to the next step from 4 (= N) steps from program step m + 1 to program step m + 4. Equivalent to. In the program step m + 4, as shown in the drawing, it is known in step 1 that the supply table 7 corresponding to the suction table moves to the position 115 in the program step m + 4 based on the component mounting information. On the other hand, in the program step m, the supply table 8 corresponding to the unsucked table exists at the position 116 as shown. Program step m
Supply table 8 corresponding to the non-sucking table at +4
However, even in the program step m + 4, the position 11
If it stays at 6, program step m + 4
It is predicted that the supply table 7 and the supply table 8 will abut on the basis of the component mounting information.
Therefore, in the program step m + 4, the supply table 8 needs to move to the position 117 at least a predetermined distance from the supply table 7 as shown in the figure. Therefore, in the present embodiment, in step 4, based on the information acquired in step 1, after the next process,
If the distance between the suction table and the non-suction table is smaller than the predetermined distance in each of the N-1 processes, in step 8, after the program step m corresponding to the current process, From the start of the program step m + 1 which is the next process, the program step m + 3
Until, in other words, while the suction table is moving,
Is required to move the supply table 8 corresponding to the unsucked table from the position 116 to the above-mentioned position 117 in advance. By adopting such a moving method in Step 8, II in FIG.
Supply table 7 at a time from program step j + 3 to program step j + 4 shown in section I
And the conventional case where the supply table 8 is moved,
Since the amount of movement of the supply table 8 per unit time is reduced, mechanical vibration caused by the supply table 8 can be reduced. Therefore, according to the moving method of the present embodiment, it is possible to solve problems such as a component suction error, a component waste, a time consumption for repairing the component, and a deterioration in mounting accuracy that may occur due to the mechanical vibration.

On the other hand, when it is determined in step 4 that the distance between the suction table and the adjacent non-suction table is not less than the predetermined distance, the process proceeds to step 9. In step 9, the non-sucking table is moved to follow the suction table as shown in section VI of FIG. 2 so that the suction table and the non-sucking table maintain the predetermined distance.

The above steps 1 to 4
The operations of step 8 or step 9 and step 7 are executed by the control device 101 for each of the above steps immediately before one of the above steps is started.

The above-mentioned N times is at least two times including the next step, and any number more times can be set. For example, in the case of a production program in which a large movement of the supply table is frequently performed, the above N
Is set to a large value, and conversely, in the case of a production program in which a small movement of the supply table is repeatedly performed, a small value is set, so that the unnecessary movement of the non-sucking table is reduced, which is more effective.

Further, in the present embodiment, the case of the component supply apparatus 2 composed of two supply tables 7 and 8 has been described as an example. However, even in the case of composed of three or more supply tables. The supply table moving method of the present embodiment is applicable. That is, as shown in FIG. 5, a supply table 122 corresponding to at least one unsucked table and a supply table 122 corresponding to at least one unsucked table with respect to the supply table 121 corresponding to the suction table and a right side in the figure. Supply table 123 corresponding to at least one unsucked table
The supply table moving method according to the present embodiment may be applied to these supply tables 122 and 123. By doing so, the vibrations of three or more supply tables can be reduced, and a greater effect can be obtained.

In the above description, as shown in FIG.
In the above example, the same supply table is used for all of the suction tables in the N times. However, even in the case where the suction table is changed or the transfer operation occurs during the N times, the moving method of the present embodiment is used. Can be applied. In this case, when the above-mentioned transfer operation occurs, the suction table and the non-suction table adjacent thereto move at an interval of the predetermined distance or more, and thereafter, the supply table which becomes a new suction table again returns to the N position. The moving method of the present embodiment is executed based on the above-mentioned component mounting information.

Further, in the present embodiment, an electronic component is taken as an example of a component, and a circuit board is taken as an example of an object on which the component is mounted. However, the present invention is not limited to this. The supply table moving method of the present embodiment can be applied to an apparatus in which components are provided in a component supply unit mounted side by side along the moving direction and mounted on these supply tables.

[0024]

As described above in detail, according to the supply table moving method according to the first aspect of the present invention and the component mounting apparatus according to the second aspect, the control by the control device allows the component supply position to be determined in the subsequent process. When it is determined that one supply table on which the component supply unit in which the components are held is mounted and another supply table adjacent to the one supply table approach an interval less than a predetermined distance, the one supply table and the The other supply table is moved in advance from the next step so as to be separated from the other supply table by the predetermined distance or more in the subsequent step. Therefore, the timing at which the other supply table can be moved can be effectively used without waste, and the inefficient stop state of the other supply table can be eliminated. That is,
Since the distance over which the other supply table moves in one step is reduced and the movement speed is also reduced, the mechanical vibration generated by the movement of the one supply table and the other supply table is reduced and smoothed. Can be. Therefore, it is possible to solve problems such as component suction error, component waste, component repair time consumption, and mounting accuracy deterioration that may occur due to the mechanical vibration.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating an operation in a supply table moving method according to an embodiment of the present invention.

FIG. 2 is a diagram showing a movement position of a supply table in the operation shown in FIG.

FIG. 3 is a plan view showing a structure of a component mounting apparatus on which the moving method shown in FIG. 1 is executed.

FIG. 4 is a diagram showing a structure of the component supply device shown in FIG.

FIG. 5 is a diagram for explaining a case where the moving method shown in FIG. 1 is applied to an apparatus having three or more supply tables.

FIG. 6 is a plan view showing the structure of a conventional component mounting apparatus.

FIG. 7 is a view showing the structure of the component supply device shown in FIG.

8 is a flowchart showing an operation in a method of moving a supply table executed by the component mounting apparatus shown in FIG.

FIG. 9 is a view showing a movement position of a supply table in the operation shown in FIG. 8;

[Explanation of symbols]

2 ... part supply device, 4 ... rotary head unit, 7,8 ...
Supply table, 9: component supply unit, 10: component holding position, 11: circuit board.

Claims (6)

[Claims] 1. A plurality of supply tables (7, 8) each having a component supply unit (4) provided with components mounted thereon are arranged along the moving direction of the supply table, and the components of the component supply unit are A component supply device (2) that moves the supply table in the moving direction so that the desired component supply unit is located at a component holding position (10) to be held.
And the component held at the component holding position,
In the method of moving the supply table, which is executed in the component mounting apparatus including the component holding device (4) mounted on 1), based on the component mounting information describing the mounting order of the components on the mounted body. Next, in the next step of holding the component at the component holding position and at least one of the following steps subsequent to the next step, the next step of holding the component at the component holding position, the component is held. The movement position of one supply table on which the component supply unit to be mounted is mounted and another supply table adjacent to the one supply table is predicted (S
2) Based on the prediction, it is determined whether or not one supply table in which the component holding is performed and the other supply table approach a distance less than a predetermined distance in the next process (S3). When it is determined that there is no approach to a distance less than the distance, it is further determined whether there is an approach to the distance less than the predetermined distance in the next step based on the prediction (S4), and in the next step, the distance less than the predetermined distance is determined. When it is determined that there is approach, the one supply table in which the component is held and the other supply table are efficiently moved without waste so that the other supply table is separated by the predetermined distance or more in the subsequent process. (S8). A method of moving the supply table. 2. When it is determined that one supply table on which the component holding is performed in the next step and the other supply table are close to a distance less than an upper predetermined distance, the other supply table includes the one supply table. The method of moving the supply table according to claim 1, wherein the supply table moves following the movement of the supply table. 3. The efficient movement without waste in the other supply table means a position where the other supply table is separated from the one supply table in which the component holding is performed by the predetermined distance or more in the subsequent process. 3. The method of moving a supply table according to claim 1 or 2, wherein the other supply table is moved from a point in time preceding the next step to a point preceding the next step after the current step which is one step before the next step. . 4. A plurality of supply tables (7, 8) each having a component supply unit (4) provided with components mounted thereon are arranged in the moving direction of the supply table, and the components of the component supply unit are arranged in a parallel manner. A component supply device (2) that moves the supply table in the moving direction so that the desired component supply unit is located at a component holding position (10) to be held.
And the component held at the component holding position,
And a component holding device (4) to be mounted on 1), based on component mounting information describing an order of mounting the components on the mounted body, and then at the component holding position. A supply step on which a component supply unit for holding the component is mounted in the next step of holding the component and at least one of the next steps following the next step and the next step of holding the component at the component holding position A movement position of the table and another supply table adjacent to the one supply table is predicted. Based on the prediction, one supply table in which the component holding is performed and the other supply table are separated by a predetermined distance in the next process. It is determined whether or not to approach a distance less than the predetermined distance, and when it is determined that there is no approach to a distance less than the predetermined distance, the distance below the predetermined distance is further determined in the next step based on the prediction. It is determined whether or not there is an approach, and when it is determined in the subsequent step that there is an approach to a distance less than the predetermined distance, one supply table where the component holding is performed and the other supply table are used in the subsequent step. A component mounting apparatus, comprising: a control device (101) for moving the other supply table efficiently without waste so as to be separated from the predetermined distance or more. 5. The controller according to claim 1, wherein the controller determines that the one supply table on which the component holding is performed in the next step and the other supply table are close to a distance less than an upper predetermined distance. the table is moved with movement of said one of the feed table, the component mounting apparatus of claim 4, wherein. 6. The efficient movement without waste in the other supply table means a position where the other supply table is separated from the one supply table in which the component holding is performed by the predetermined distance or more in the subsequent process. 6. The component mounting apparatus according to claim 4, wherein the other supply table is moved to precede the current step, which is a step immediately before the next step, from a time immediately before the next step.