JPH0494754A - Liquid injecting device - Google Patents

Abstract

PURPOSE:To improve working efficiency by providing a device for measuring the position of a material to be treated with respect to its traveling route, a nozzle for injecting a liquid and a means for actuating the nozzle in accordance with the movement of the material. CONSTITUTION:When a car body BD passes through point CV1 directly before the inlet of a both BS, the kind of the body BD is detected by a kind discriminating sensor KS, the passage of the body BD through point CV1 is confirmed by No.1 limit switch LS1, and the respective detection signals are outputted to a signal processing part 10. No.1 counter 21, for example, among counters 21, 22, 23 and 24 is started by the signal processing part 10 based on the output signal form No.1 limit switch LS1. The position signals of the body BD on the conveyor CV based on the number of pulses counted by No.1 counter 21 are successively outputted to a memory 30 from No.1 counter 21. Meanwhile, a kind signal of the body BD is outputted to the memory 30 of the signal processing part 10 based on the output signal of the sensor KS. Consequently, the posture of the nozzle with respect to the material to be treated is optimized.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a fluid injection method in which a fluid is injected through a nozzle onto a workpiece moving along a conveyance path, and the workpiece is subjected to a required treatment. Regarding equipment.

[Conventional technology]

For example, in pre-painting equipment for automobile bodies, a pre-treatment agent (fluid) is applied to the car body (object to be treated) just before paint is applied in the booth, and the car body undergoes the necessary pre-treatments such as degreasing and cleaning. will be held.

The pretreatment agent is usually injected through a plurality of nozzles arranged inward from the inner peripheral wall of the booth, and is sequentially applied in the form of a spray to the vehicle body being transported within the booth.

[Problem to be solved by the invention]

By the way, the above-mentioned pre-treatment agent needs to be applied sufficiently to the entire vehicle body, but with the nozzle directed inward of the booth as described above, the application to the front and rear sides in the transport direction may not be sufficient. Become.

For this reason, in the past, dedicated nozzles for the front and rear surfaces were prepared in advance and placed at an angle, and these dedicated nozzles were used to sufficiently apply the pretreatment agent to the front and rear surfaces of the vehicle body. There is.

However, if dedicated nozzles are to be installed as described above, the booth base must be extended in order to secure the positions for these nozzles.

Moreover, these dedicated nozzles for the front and rear surfaces must be kept open and stopped until the object to be processed reaches a predetermined position, that is, until the corresponding end surface of the object to be processed approaches. The work efficiency for the group will be significantly lowered.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a fluid ejecting device that can improve work efficiency.

[Means to solve the problem]

In the fluid ejecting device according to the present invention, the fluid ejecting device injects a fluid to a workpiece moving along a conveyance path, the fluid ejection device includes a position measuring means for measuring the position of the workpiece with respect to the conveyance path; A nozzle that is disposed movably along the moving direction of the object and that injects the fluid described in 1. and a means for operating in accordance with.

[Effect]

According to the above configuration, the attitude of the nozzle that injects fluid is changed as the object to be processed moves.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the present invention will be described in detail based on drawings showing embodiments.

FIG. 2 conceptually shows the fluid injection device according to the present invention, in which an automobile body (workpiece) as shown in FIG.
A fluid injection device applied to BD painting pretreatment equipment is illustrated.

In this pre-painting treatment equipment, as shown in Figs. 1 and 2, a transport conveyor (
A booth BS is configured in the conveyor path (CV), and a No, i and No, 2 limit switch LS+ is installed in the path of the conveyor C2.

LS2, a model discrimination sensor KS, and a pulse generator P are provided.

The booth BS has a rectangular box shape with both ends open, and has a plurality of partition walls WRJ, Wl, , I, WR2W on its internal side walls.
)72..., and these bulkheads WRI, WL
I.

Multiple upper STI, ST2 by WR2, Wl2...
It is divided into... For example, a degreasing process, a water washing process, a surface conditioning process, a chemical conversion process, etc.

The No. 1 limit switch LS+ is arranged at a point CV+ on the conveyor CV immediately before the entrance of the booth BS, and the No. 12 limit switch LS2 is arranged at a point CV2 immediately after the exit of the booth BS. The passing situation of the vehicle body BD is detected at point CV2 and point CV2.

The model discrimination sensor KS is located at the arrangement point CV1 of the N091 limit switch LS+ in "1" on the conveyor CV.
It is placed on the stream side and projects a light beam onto a specific position of the vehicle body BD being transported,
The reflected light is received, and the model of the vehicle body BD is determined based on the difference in the reflected light.

The pulse generator P is disposed on the output shaft of the motor CM that drives the conveyor C■, and generates a number of pulses corresponding to the rotation of the motor CM, that is, a number corresponding to the conveyance distance of the conveyor CV. It is outputting.

On the other hand, in the painting pretreatment equipment, a plurality of fluid injection units RHO, RH2, . . . are configured inside each process STY, ST2, . . . in the booth BS. Note that these fluid injection units RH, RH2, . . . each have a similar configuration, and therefore only the fluid injection unit RHI will be described below as a representative.

As shown in FIG. 2, the fluid injection section RHI is provided with a pair of left and right riser pipes TRI, TI, and I on both sides of the interior of the booth BS, respectively.

These riser pipes TRI, TI, and l each have a plurality of nozzles N and N at mutually corresponding positions on their respective circumferential surfaces.
1, 1..., and is equipped with a support shrine API, AI at one end of each, and a respective shaft part I is attached to the holding members H, H... attached to the inner wall of the booth BS. ,tAI? I, AI, and I are held rotatably around their respective axes in such a manner that they face upward (upward in the figure). The shaft parts +]A, AI, and l are solid cylindrical, and their respective upper ends protrude from the upper surface of the booth BS described in 1.A driven gear DGRI is attached to each of these individual protruding ends. , DGI, 1. In addition, the above nozzle NI? I, Nl, I... are arranged in the same direction from each riser pipe TRI, TI, I.

As is clear from the figure, these riser tubes are
, I is provided with a supply pipe T1 between the lower ends thereof. The supply pipe T1 is connected to a communication pipe CP1 and a spray pump S.
It is connected to the pretreatment agent (fluid) storage tank TKI via P+, and is equipped with nozzles NR and Nl on the - side, and has a swivel joint SJ configured at both ends thereof.
The above riser pipe TRI, via RI, S JLI,
It is connected to TI,1.

Note that the symbol PMI in FIG. 2 refers to the above spray pump S.
Pump motors driving the PI, symbols ST+ and SB+
1 and 2 respectively show a strainer and a partition plate disposed in the pretreatment agent storage tank TK.

Further, the fluid ejection unit RH1 is provided with a pair of left and right geared motors MRI M+, 1 on the upper surface of the booth BS. These geared motors MRL, MLI have the shaft members A old, A1. ．． l driven gear D G R1
゜Drive gear MGl that meshes with DGI? The output shaft O8 is mounted on the upper surface of the booth BS in such a manner that the output shaft O8 and the os are directed downward.

In the fluid injection section RH configured as shown in "-," the above-mentioned geared motor MI? When I and M are rotated, the output shafts Al? I,
AI, driven gear DGI fixed to 1? I, D
GI, I are rotated, and these shaft parts 'API, A
The riser pipes TIN and T are rotated about their axes through the riser pipes TIN and T.

When riser pipes TRI and TI rotate, nozzles NR1, Nlj... arranged on their respective circumferential surfaces swing,
The nozzle NRI, N1. The leading ends of I... are respectively moved along the transport direction of the transport conveyor CV.

Further, when the spray pump SP1 is driven by the pump motor PMI in item 1, the pretreatment agent in the storage tank TK1 is supplied to the supply vibrator T via the partition plate SBI, strainer STI, and communication pipe CPI, and Nozzle NI? , is injected from N17 toward the vehicle body BD transported into the booth BS, and further ``1
Pre-treatment agent for supply vibrator T1 or swivel joint 5J
Riser tube TRI, TI, I via RI, 5JLl
and the riser pipe TI? I, T old nozzle NI
N, N1. I... are injected toward the vehicle body BD in the booth BS, respectively. In addition, excess pre-treatment agent in the bus BS that has not been applied to the vehicle body BD will be removed from the booth B.
The liquid is collected into the storage tank TKl by the liquid collecting means SEI arranged in the lower part of the liquid S, and is used again.

The present invention will be described in detail below with reference to FIGS. 1 and 3.

In this pre-painting treatment equipment, when the vehicle body BD that has been conveyed intermittently or continuously along the conveyor C■ passes through a point CV1 just before the entrance of the booth BS, it is first detected by the model discrimination sensor KS. The model of the car body BD is detected and No.

The above vehicle body BD is set to point C by the 1 limit switch LSI.
It is confirmed that the signal has passed through V1, and each detection signal is output to the signal processing section]O.

The signal processing unit 10 includes the above-mentioned No. 1 limit switch LS.
Based on the output signal from +, first, for example, the No. 1 counter 21 is activated from among the plurality of counters (position measuring means) 2122... prepared.

As a result, the counter 21 starts counting the number of pulses output from the pulse generator P.

The number of pulses counted by this No. 1 counter 21 is:
This corresponds to the transport distance after the vehicle body BD passes the point CV1 of the transport conveyor CV, and the position signal of the vehicle body BD in the transport conveyor CV based on this transport distance is stored sequentially from the No. 1 counter 21. 30.

]0 On the other hand, the signal processing unit 10 in "1"
Based on the output signal of S, a model signal of the vehicle body BD "1" is output to the memory 30.

By the way, in this memory 30, the above-mentioned conveyor C■
Each riser pipe T corresponding to the occupied position of the vehicle body BD in
The color standard θ of R1, T Ll-T Rn, T I, n is stored in advance in memory data 40 as shown in FIG. , 41.

These riser pipes T R1, T Ll, T Rn, T
For example, as shown in FIGS. 4(a) to 4(h), the "1 color standard θ" of Ln is
Nozzles NRm, N1. of riser pipes TR+n, TLm, etc. close to D. , m... rock following the movement of the vehicle body BD, and the individual nozzles N Rm, N 1. m
. . are set so that the openings at the ends thereof are located at optimal positions with respect to the treated surface of the vehicle body BD. In addition, in these FIGS. 4 and 5, the riser pipe T Rm
, T I, +n... nozzle NRm,
When Nl, m... are positioned perpendicular to the conveyor C■, the angle is 00, and from there, the nozzles N Rm, N Lm, etc. are directed in the direction of movement of the conveyor C■. The angle when it is swung is ``-''. Further, although FIG. 5 shows two types of memory data 40 and 41, in reality, the number of types of memory data 40 and 41 is prepared as many as the number of types of vehicle bodies BD to be conveyed on the above-described conveyor CV.

In the memory 30, first, memory data corresponding to the model of the insect BD, for example, memory data 40, is selected based on the model signal from the signal processing section 10, and then manually from the N081 counter 21. This memory data 4 is based on the position signal of the vehicle body BD.
Each riser pipe T R1, T LI =・ stored in 0
``1 color standard θ of T Rn, T I, n is read,
Signals indicating this target angle θ are sequentially outputted to the motor control signal generator 50, as shown in FIG.

The motor control signal generator 50 generates individual riser pipes TRI, T1, 1 .
=・T Inn TI, geared motor Mllll linked to n.

]2 Ml, I...MRn, motor drive circuit corresponding to MLn 60 old, 60 Ll/60 Rn, 60
An angle signal indicating each target angle is output to Ln.

This causes the geared motor Ml? I, Ml, I・
...MRn, Ml, the mouth is rotated by the required angle, and the nozzle Nl? I.

N1. , I...NRn, Nl,n are in the optimum state for the treatment surface of the vehicle body BD.

In such painting pretreatment equipment, the above nozzle N
R1, N 1. Since the pre-treatment agent injected from l ・N Rn and N Ln can always be effectively applied to the treated surface of the vehicle body BD, the work efficiency per no-through piece is improved, the booth BS length is shortened, and the booth BS length is reduced. It is possible to reduce the number of nozzles arranged in the area.

By the way, in actual work, even during the above-mentioned action, that is, while the No. 1 counter 21 is operating, the vehicle bodies are sequentially carried into the booth BS at predetermined intervals, so it is difficult to identify the model. Sensors KS and No. 1 limit switch LS1 are activated one after another.

] 3 In this case, the signal processing section ] 0 outputs the N002 counter 22 .
In order to sequentially operate the No. 3 counters 23, . . ., individual position signals corresponding to the respective vehicle bodies are added to the memory 30 from these counters 22, 23, .

On the other hand, signals indicating the model of each vehicle body BD are sequentially applied to the memory 30 from the signal processing section 10.

As a result, for subsequent vehicle bodies as well, the geared motors MR1, MLI, .

MLn will rotate.

Note that the points CV1. of the conveyor Cv are determined by the counters 21, 22, . The number of pulses corresponding to the distance between CV2 is counted, and NO32 limit switch L
When it is confirmed by S2 that the vehicle body BD has actually passed through C2, the corresponding reset/soto circuits 70, 71... are driven based on the respective output signals, and the reset circuits 70, 71.・The corresponding counter 21. ．．
22... is reset.

The reset counters 21, 22, . . . are activated again by the output signal from the bipedal signal processing unit O, and start counting the number of pulses generated by the pulse generator P.

Therefore, it is necessary to prepare counters 21, 22, . . . at least as many as the number of vehicle bodies accommodated in the booth BS.

Note that in the first embodiment, a fluid injection device applied to a pre-painting treatment facility for an automobile body BD is exemplified, but the present invention is not limited thereto. Zunawaji, automotive body B
It can be applied not only to D but also to other objects to be treated, and the fluid is not limited to the pretreatment agent, but may be other fluids such as paint.

In addition, in the above embodiment, the light->no-tube TI? l,
By rotating T1.1..., the nozzles NRI arranged in these riser pipes T, TI, 1...
N1. , I... are moved, but the nozzle itself may be movably disposed in the riser pipe or the like.

Furthermore, in the first embodiment, the nozzles NRI, N1. Although the nozzle can be moved in other ways, for example, if the nozzle is always lowered and moved to follow the vehicle body, work efficiency can be further improved. It is also possible to aim for According to the embodiment described above, by rewriting the memory data 40 and 41 stored in the memory 30, it is possible to change the movement mode of the nozzle on the container.

〔Effect of the invention〕

As explained below, according to the fluid ejecting apparatus according to the present invention, the attitude of the nozzle that injects fluid is changed as the object to be processed moves, so the attitude of the nozzle with respect to the object to be processed is always optimized. This makes it possible to improve work efficiency.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 conceptually shows a painting pretreatment equipment to which a fluid ejection device according to the present invention is applied, and Fig. 2 shows a top view of the fluid ejection device according to the present invention. FIG. 3 is a block diagram showing an embodiment of the fluid ejection device according to the present invention, and FIGS. 4(a) to 4(h) are cross-sectional views conceptually showing the structure. FIG. 5, which is a conceptual top view sequentially showing the operations of the nozzles employed in the ejecting device, is a graph conceptually showing memory data applied to the embodiment of the fluid ejecting device according to the present invention. 21,. 22, 23, 24...Position measuring means, BD.
...Workpiece, CV...Transport path, N...Nozzle.

Claims (1)

[Scope of Claims] A fluid ejecting device that injects a fluid onto a workpiece moving along a conveyance path, comprising: a position measuring means for measuring the position of the workpiece with respect to the conveyance path; a nozzle disposed movably along a direction and injecting the fluid from its tip; and means for operating the nozzle in response to movement of the object to be processed based on position data measured by the position measuring means. A fluid ejection device comprising: