JP3916789B2 - Component positioning control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a component positioning control device, and more particularly to a component positioning control device capable of assembling components such as an inkjet head used in a copying machine, a facsimile machine, a printer device, etc. with high accuracy.
[0002]
[Prior art]
In general, in an image forming method using an ink jet printer that discharges ink liquid from a discharge hole and outputs an image, the ink liquid is sprayed onto a recording sheet. In this printer apparatus, a part that fills ink and sprays ink is called an ink jet head (hereinafter simply referred to as a head), and the positioning accuracy of the head with respect to the printer apparatus has a great influence on image quality.
[0003]
Hereinafter, an image forming method using this head will be described with reference to FIG. 6A shows the positional relationship between the head 1 and the recording paper 2 on the printer apparatus, and FIG. 6B shows the ejection state of the ink 3.
[0004]
In FIGS. 2A and 2B, the head 3 is scanned in the X direction and at the same time the ink 3 is ejected, so that the ink 3 adheres on one straight line of the recording paper 2 and a linear image is formed. Further, the next straight line image is formed by moving the recording paper 2 in the Y direction so as to be positioned on the next straight line after the straight line image is formed.
[0005]
In this way, an image of the entire recording paper 2 (plane) is formed by repeating the scanning in the X direction, the ejection of the ink 3 and the movement in the Y direction.
[0006]
By the way, in this printer device, if the head 1 is displaced and positioned in the X, Y, and Z directions on the printer device, the ink 3 cannot be ejected to a desired position on the recording paper 2. The image quality will deteriorate.
[0007]
Such a head is configured to be fixed to a common head holding member with an adhesive and to be scanned in the X direction by the head holding member. Then, in order to attach the head to the head holding member, the head is held by the chuck of the assembly apparatus, and then an ultraviolet curable adhesive is applied to the mounting surface of the head attached to the head holding member, and then the chuck is programmed. After moving the head holding member set at the target position to adjust the positioning of the head to the head holding member, the head is attached to the head holding member by curing the ultraviolet curable adhesive with ultraviolet rays .
[0008]
By the way, since the head is attached to the head holding member by an ultraviolet curable adhesive, the head is displaced with respect to the head holding member due to curing shrinkage of the adhesive after the head is attached to the head holding member. May end up. Conventionally, in order to prevent misalignment of the head due to such curing shrinkage of the adhesive, the amount of adhesive applied is reduced, the amount of ultraviolet light is reduced, or the chuck holding force is weakened. Therefore, the effect of positional deviation due to the chuck was reduced.
[0009]
[Problems to be solved by the invention]
However, if the amount of adhesive applied is reduced or the amount of ultraviolet light is reduced in order to prevent the head from being displaced due to curing shrinkage of the adhesive, when the head is attached to the head holding member, Insufficient strength causes the head to shift with respect to the head holding member due to impact when the head is moved during image formation, and the ink cannot be ejected to a desired position on the recording paper. The problem of getting worse has occurred. Further, when the holding force of the chuck is weakened, the head cannot be reliably held, resulting in a problem that an assembly failure occurs.
[0010]
Therefore, the present invention calculates the amount of deviation from the target position when the component is attached to the member to be attached over a predetermined number of times, and resets the next target position based on the amount of deviation, thereby pre-adhesive. The fixed position of the part due to curing shrinkage of the adhesive can be set to the target position, and the amount of adhesive applied can be reduced, held and moved by suppressing the amount of deviation of the part due to the temporal fluctuation of the curing shrinkage of the adhesive An object of the present invention is to provide a component positioning control device capable of firmly attaching a component to a member to be attached without reducing the holding force of the means.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 holds a part to be moved, a holding / moving means capable of moving the part to a mounted member located at a target position, and the part Control means for driving and controlling the holding / moving means so as to be located at a target position; application means for applying an adhesive to the part at any position within the movement range of the part including the target position; and the part Detecting means for detecting an actual position when the component is attached to the attachment member, wherein the control means is configured to detect the component based on detection information from the detection means. Correction amount calculation means for calculating a deviation amount from the target position when attached to the attachment member as a correction amount; storage means for storing the correction amount calculated by the correction amount calculation means a predetermined number of times; and Average value calculating means for calculating an average value of the correction amounts from the accumulation result of the correction amounts stored in the storage means, and the target position based on the average value of the correction amounts calculated by the average value calculating means And driving the holding / moving means for a predetermined number of times based on the corrected target position data, and based on the actual position detection information from the detection means, the average value calculating means based on the new correction amount from the target position after the calculated corrected by the parts stored in the storage means for a predetermined number of times the amount of deviation from the target position when the attached to the mounting member It is characterized by doing.
[0012]
In that case, when the component is moved to the target position and attached to the mounted member, the amount of deviation of the component from the target position is calculated as a correction amount over a predetermined number of times, and the calculation result is stored in the storage means. By calculating the average value of the correction amounts stored in the storage means and resetting the next target position based on this average value, the fixed position of the part due to curing shrinkage of the adhesive can be set as the target position in advance. In addition to this, it is possible to suppress the amount of deviation of parts due to the temporal variation of the curing shrinkage of the adhesive. As a result, the component can be firmly attached to the member to be attached without reducing the application amount of the adhesive or reducing the holding force of the holding / moving means.
[0013]
According to a second aspect of the present invention, in order to solve the above-mentioned problem, in the first aspect of the present invention, the part to be moved by the holding / moving means is an ink jet head, and the attached member is an ink jet printer. It is a head holding member.
[0014]
In that case, the inkjet head can be positioned and firmly attached to the printer device with high accuracy, and the quality of the image can be improved.
[0015]
According to a third aspect of the present invention, in order to solve the above-mentioned problem, in the first aspect of the present invention, a part to be moved by the holding / moving means is constituted by an intermediate holding member, and the attached member Is composed of an inkjet head and a head holding member of an inkjet printer, and the intermediate holding member is interposed between the inkjet head and the head holding member.
[0016]
In that case, since the inkjet head can be positioned and firmly attached to the printer device via the intermediate holding member with high accuracy, the image quality can be improved.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
1 to 4 are diagrams showing a first embodiment of a component positioning control apparatus according to the present invention, which is intended for an inkjet head as a component for positioning.
The present embodiment corresponds to the first or second aspect of the invention.
[0019]
First, the configuration will be described. In FIG. 1, reference numeral 11 denotes an ink jet head (hereinafter simply referred to as a head) that is a component to be moved, and the head 11 ejects ink droplets from a plurality of ink ejection holes 11a. Reference numeral 12 denotes a frame (head holding member) as a member to be attached to the ink jet printer, and the head 11 is attached to the frame 12 by ultraviolet curable adhesives 13a and 13b. In the present embodiment, the attachment surfaces of the head 11 to which the adhesives 13a and 13b are attached are two points on both side surfaces of the head 11.
[0020]
On the other hand, in FIG. 2, 14 is a schematic view of an assembly apparatus (positioning control apparatus) for an ink jet printer. This assembly apparatus 14 has a head chuck 15 that can hold (hold) the head 11, and this head chuck 15 The head 11 can be gripped and released by being driven by the electromagnetic valve 16.
[0021]
The head chuck 15 is driven by a head adjustment motor 17. The head adjustment motor 17 moves from a standby position where the head 11 waits for the head chuck 15 to a mounting position (target position) where the frame 12 is located. It is supposed to drive up to.
[0022]
The head preparation motor 17 is driven by a motor driver 18 and a motor controller 19. The motor controller 19 receives a command signal from a CPU (Central Processing Unit) 20 and sends a drive signal to the motor driver 18. It is supposed to send. Upon receiving this drive signal, the motor driver 18 amplifies the signal and drives the head adjustment motor 17.
[0023]
In the present embodiment, the head chuck 15, the electromagnetic valve 16, the head preparation motor 17, the motor driver 18, and the motor controller 19 constitute holding / moving means.
[0024]
Reference numeral 21 denotes a syringe unit. The syringe unit 21 is disposed on the mounting position where the frame 12 is set, and is driven based on a command signal from the CPU 20 when the head 11 moves to the mounting position. The pair of syringes are moved to the mounting surface of the head 11 by the driving device, and the adhesives 13a and 13b are applied to both side surfaces of the head 11.
[0025]
In the present embodiment, the syringe unit 21 constitutes the application means, but the syringe unit 21 is not limited to the one installed on the attachment position, and the position between the standby position where the head 11 stands by and the attachment position is not limited. It may be provided at an arbitrary position in the movement range of the head 11.
[0026]
Reference numeral 22 denotes an ultraviolet irradiation unit. The ultraviolet irradiation unit 22 irradiates the adhesives 13a and 13b applied to the head 11 with a UV lamp driven by a command signal from the CPU 20 for a predetermined time (about 10 seconds). Thus, the adhesives 13a and 13b are cured.
[0027]
On the other hand, reference numeral 23 denotes a CCD camera. The CCD camera 23 is disposed on the mounting position of the frame 12 , and images the mounting surface of the head 11 and the frame 12 . The CCD camera 23 is turned on / off by a camera power supply unit 24 driven based on a command signal from the CPU 20. In this embodiment, the CCD camera 23 and the camera power supply unit 24 constitute detection means for detecting the actual position of the head 11 when the head 11 is attached to the frame 12.
[0028]
The CPU 20 outputs a command signal to the motor controller 19 based on target position information for attaching the head 11 stored in the memory 25 in advance to the frame 12. The motor controller 19 outputs a drive signal to the motor driver 18 based on the command signal, and the motor driver 18 drives the head adjustment motor 17 based on the drive signal to target the head 11 gripped by the head chuck 15. It is designed to move to a position.
[0029]
Further, when the head 11 is actually attached to the frame 12 based on the detection information from the CCD camera 23, the CPU 20 calculates the amount of deviation from the target position of the head 11 as a correction amount, and this calculated correction amount is calculated. It is stored in the memory 25.
[0030]
Each time the head 11 is attached to the frame 12, the amount of deviation from the target position when the head 11 is actually attached to the frame 12 is calculated as a correction amount based on the detection information from the CCD camera 23. The corrected amount is sequentially stored in the memory 25. In the present embodiment, 10 times of data is stored in the memory 25.
[0031]
Then, an average value of the correction amounts is calculated from the accumulated results of the ten correction amounts stored in the memory 25, and the target position data is corrected based on the calculated average values of the correction amounts. Based on the target position data, a command signal is output to the motor controller 19 to attach the head 11 to the frame 12, and the amount of deviation from the new target position at this time is stored in the memory 25 as described above. That is, for example, for the data for mounting the head 11 on the frame 12 only 10 times this time, the average value of the correction amount data for the previous 10 times is used.
[0032]
In the present embodiment, the memory 25 constitutes a storage means, and the CPU 20 constitutes a control means, a correction amount calculation means, and an average value calculation means.
[0033]
Next, a method of attaching the head 11 to the frame 12 will be described with reference to a flowchart of FIG. 3 and a diagram showing a head correction method shown in FIG.
[0034]
First, after the electromagnetic valve 16 is driven and the head 11 is gripped by the head chuck 15 (step S1), the target position for adjustment is read from the memory 25 (step S2).
Next, after reading the correction amount of the positional deviation data for 10 times from the memory 25 (step S3), an average value of the correction amounts is calculated (step S4).
[0035]
Next, the average value of the correction amount is substituted into the target position data, that is, the target position data ± the average value of the correction amount is calculated (step S5), and the motor controller 19 is based on the new target position data. Drives the head adjustment motor 17, moves the head 11 to the mounting position of the frame 12, and adjusts the position of the head 11 (step S6).
[0036]
Next, when the adjustment work is completed (YES in step S7), the syringe unit 21 is driven to apply the ultraviolet curable adhesives 13a and 13b to both side surfaces of the head 11, and the ultraviolet irradiation unit 22 is activated. The heads 11 are fixed to the frame 12 by irradiating the adhesives 13a and 13b with ultraviolet rays (step S8).
[0037]
Next, it is determined whether or not the fixing is completed (step S9). In this case, it is determined that the fixing is completed when the ultraviolet rays are irradiated for 10 seconds, the electromagnetic valve 16 is turned off, and the head by the head chuck 15 is turned off. 11 is released (step S10).
[0038]
Next, after the camera power supply unit 24 is actuated and the CCD camera 23 measures the positional deviation of the head relative to the frame 12, that is, the positional deviation (fixed deviation) of the head 11 from the newly set target position ( step S11), and substituting the positional deviation amount to the correction amount, i.e., it calculates the correction amount ± positional displacement amount (step S12), and stores the result of the calculation in the memory 25 (step S 13).
[0039]
Here, a method for correcting the positional deviation of the head will be described with reference to FIG.
[0040]
In the present embodiment, since the adhesives 13a and 13b are applied to both side surfaces of the head 11, when the adhesives 13a and 13b are cured by ultraviolet rays , the head 11 is bonded to the adhesive 13a by contraction of the adhesives 13a and 13b. There is a case where the position shifts to either the side or the 13b side, and this position shift is different in time and does not always shift to the same amount in one side.
[0041]
Here, it is assumed that the head 11 is deviated from the target position, for example, toward the adhesive 13a, and this direction is the + direction, and when the head 11 is deviated to the adhesive 13b, this direction is the − direction.
[0042]
Then, when there is a deviation of A1 from the target position in the + direction, the correction amount is set by A2 (A1 = A2) in the-direction. This correction amount is the average value of the correction data stored in the memory 25. Thus, if a new target position that is shifted from the target position by an amount corresponding to the correction amount is set using the average value of the previous correction amount, the head 11 is fixed to the frame 12 by the adhesives 13a and 13b. The positional deviation of the head 11 due to curing shrinkage of the adhesives 13a and 13b can be suppressed.
[0043]
Here, when the target position is corrected and the head 11 is adjusted and attached to the frame 12, the positional deviation amount of the head 11 becomes larger than the correction amount A2 as shown in (1) of FIG. In step S12, the correction amount−the positional deviation amount is calculated, and the result is stored in the memory 25 in step S13. The positional deviation amount of the head 11 is larger than the correction amount A2 as indicated by (2) in FIG. If it becomes smaller, the correction amount + the positional deviation amount is calculated in step S12, and this result is stored in the memory 25 in step S13. As a result, the head 11 can be fixed at the target position even if the curing shrinkage of the adhesives 13a and 13b varies with time.
[0044]
As described above, in this embodiment, when the head 11 is moved to the target position and attached to the frame 12, the correction amount of the deviation amount of the head 11 from the target position is calculated 10 times, and the calculation result is stored in the memory 25. The correction value stored in the memory 25 is calculated, and the next target position is reset based on the average value. The position of the head 11 can be suppressed, and the amount of deviation of the head 11 due to the temporal fluctuation of the curing shrinkage of the adhesives 13a and 13b can be suppressed. As a result, the head 11 can be firmly attached to the frame 12 without reducing the application amount of the adhesives 13a and 13b or reducing the holding force of the head chuck 15.
[0045]
In addition, since the head 11 can be attached to the frame 12 with high accuracy in this way, the quality of the image when ink droplets are ejected onto the recording paper can be improved.
[0046]
FIG. 5 is a diagram showing a second embodiment of the component positioning control apparatus according to the present invention, and this embodiment corresponds to the invention described in claim 1 or 3. Since the assembling apparatus and the control method are the same as those in the first embodiment, the description will be made with reference to the drawings shown in FIGS.
[0047]
In the present embodiment, four head units, that is, four inkjet heads (hereinafter simply referred to as heads) that are filled with inks of four colors of cyan, magenta, yellow, and black and that can eject ink droplets of each color from a plurality of ejection holes. Is attached to the frame.
[0048]
The four heads are attached to one frame at the same time, and in order to simplify the explanation, an example in which one head 31 is attached to the frame 32 will be described. In the present embodiment, a head 31 having a discharge hole 31a is attached to the frame 32 via four L-shaped intermediate holding members 33a to 33d. The intermediate holding members 33a to 33d are ultraviolet curable. The adhesive 34 is fixed to the head 31 and the frame 32, and the mounting position of each head is partitioned by a partition member 32a.
[0049]
In the present embodiment, the intermediate holding members 33a to 33d constitute parts, and the head 31 and the frame 32 constitute a member to be attached, and the four intermediate holding members 33a to 33d are gripped by the head chuck 15 to form the frame. The intermediate holding members 33a to 33d are moved between the head 32 mounted on the frame 32 and the frame 32, and an adhesive 34 is applied to the mounting surfaces of the intermediate holding members 33a to 33d to attach the intermediate holding members 33a to 33d to the head. After the positioning adjustment between 31 and the frame 32, the head 31 is fixed to the frame 32 via the intermediate holding members 33 a to 33 d by irradiating the adhesive 34 with ultraviolet rays by the ultraviolet irradiation unit 22.
[0050]
Since the control at this time is the same as that in the flowchart of FIG. 3, the description thereof is omitted. However, even if the present invention is applied to the four-head unit as in the present embodiment, the timing of the curing and shrinkage of the adhesive 34 will be The head 31 is moved through the intermediate holding members 33a to 33d without suppressing the amount of deviation of the head 31 due to fluctuations, reducing the amount of the adhesive 34 applied, or reducing the holding force of the head chuck 15. It can be firmly attached to. As a result, the image quality when ink droplets are ejected onto the recording paper can be improved.
[0051]
【The invention's effect】
According to the first aspect of the present invention, it is possible to suppress the amount of deviation of the component due to the temporal fluctuation of the curing shrinkage of the adhesive, to reduce the amount of adhesive applied, and to increase the holding force of the holding / moving means. Without reducing the size, the component can be firmly attached to the member to be attached.
[0052]
According to the second aspect of the present invention, the inkjet head can be positioned and firmly attached to the printer device with high accuracy, and the image quality can be improved.
[0053]
According to the third aspect of the present invention, since the inkjet head can be positioned and firmly attached to the printer device via the intermediate holding member with high accuracy, the image quality can be improved.
[Brief description of the drawings]
1A and 1B are diagrams showing a first embodiment of a component positioning control apparatus according to the present invention, in which FIG. 1A is an exploded view of an ink jet printer to be subjected to positioning control, and FIG. FIG.
FIG. 2 is a block diagram of the assembling apparatus of the first embodiment.
FIG. 3 is a flowchart showing a procedure for attaching the head of the first embodiment to a frame.
FIG. 4 is a diagram for explaining a head positioning method according to the first embodiment;
FIGS. 5A and 5B are diagrams showing a second embodiment of the component positioning control apparatus according to the present invention, in which FIG. 5A is an exploded view of a main part of an ink jet printer to be subjected to the positioning control, and FIG. It is a figure which shows the state attached to the flame | frame via the holding member.
6A is a perspective view of a recording paper and a head, and FIG. 6B is a side view thereof.
[Explanation of symbols]
11 Head (parts)
12 Frame (attachment member)
13a, 13b Adhesive
14 Assembly equipment
15 Head chuck (holding / moving means)
16 Solenoid valve (holding / moving means)
17 Head adjustment motor (holding / moving means)
18 Motor driver (holding / moving means)
19 Motor controller (holding / moving means)
20 CPU (control means, correction amount calculation means, average value calculation means)
21 Syringe unit (application method)
23 CCD camera (detection means)
24 Camera power supply unit (detection means)
25 Memory (memory means)
31 Head (attached member)
32 frame (attachment member)
33a to 33d Intermediate holding member (parts)

Claims (3)

Holding and moving means for holding a part to be moved and moving the part to a mounted member located at a target position, and driving and controlling the holding and moving means so that the part is located at the target position. Control means, application means for applying an adhesive to the part at an arbitrary position within the movement range of the part including the target position, and an actual position when the part is attached to the mounted member. In a component positioning control device comprising a detection means,
The control means includes
Based on detection information from the detection means, a correction amount calculation means for calculating a deviation amount from a target position when the component is attached to the mounted member as a correction amount, and the correction amount calculation means Storage means for storing the correction amount a predetermined number of times, and average value calculation means for calculating an average value of the correction amount from a cumulative result of the correction amount stored in the storage means,
The target position data is corrected based on the average value of the correction amount calculated by the average value calculating means, and the holding / moving means is driven a predetermined number of times based on the corrected target position data. , based on the detection information of the actual position from the sensing means, based on the new correction amount from the target position after the calculated correction by the average value calculating means, the component is attached to the object mounting member The component positioning control device is characterized in that the amount of deviation from the target position is stored in the storage means for a predetermined number of times.   2. The component positioning control apparatus according to claim 1, wherein the component to be moved by the holding / moving means is an inkjet head, and the attached member is a head holding member of an inkjet printer.   The part to be moved by the holding / moving means is constituted by an intermediate holding member, the attached member is constituted by an inkjet head and a head holding member of an inkjet printer, and the intermediate holding member is used as the inkjet head and the head. 2. The component positioning control device according to claim 1, wherein the component positioning control device is interposed between the holding members.

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