JP4801497B2 - Paint supply device - Google Patents

Description

  The present invention relates to an improvement of a paint supply apparatus.

Various paintings are applied to the body during the painting process included in the vehicle production line. As a technique used for this coating, a coating material supply apparatus that supplies a coating material to a spray device provided in a coating booth has been proposed (for example, see Patent Document 1).
Japanese Patent No. 3680597 (FIG. 8)

Patent document 1 is demonstrated based on the following figure.
FIG. 7 is a diagram for explaining the basic configuration of the prior art. The paint supply apparatus 100 includes a paint preparation chamber 101 and a paint tank 102 and a paint pump 104 connected by a pipe 103 provided in the paint tank 102. The painting booth 105 is provided with eight painting machines 106 (... indicates a plurality, the same applies hereinafter), and the paint in the paint tank 102 is delivered between the paint preparation chamber 101 and the paint booth 105. The paint pipe 107 is configured to circulate between them, and in the vicinity of the coating booth 105, eight branch pipes 108 are provided from the paint pipe 107, and the branch pipe 108 ... 106... Is supplied with paint.

However, in the coating material supply apparatus 100 of Patent Document 1, when the coating material passes through the coating material pipe 107, particularly the horizontal portion thereof, there is a possibility that a substance having a large specific gravity among the coating material components may settle on the horizontal portion.
One method for preventing this sedimentation is to continue feeding the paint at a high speed. Since the load of the paint pump 104 is proportional to the flow velocity, the motor attached to the paint pump 104 needs to adopt a high output motor. High-power motors are large and expensive, and electric energy for operation is also increased.

In other words, measures for increasing the flow velocity cause an increase in equipment costs and an increase in operating costs.
Therefore, there is a demand for a paint supply apparatus that can suppress the sedimentation of the paint in the pipe without increasing the flow rate of the paint.

  An object of the present invention is to provide a paint supply device that can suppress sedimentation of paint in a pipe without increasing the flow rate of the paint.

The invention according to claim 1, from the paint tank placed in paint formulation chamber, to spray gun placed in the coating booth, the paint pipe is arranged, the paint in the paint tank through the paint pipe the is supplied to the spray gun, via said coating pipe excess paint is returned to the paint tank, the paint pipe, is rotatable pipe consisting of a straight pipe and the rotary joint provided at both ends of the straight pipe containing And a fixed pipe connected to both ends of the rotatable pipe , and a rotating mechanism for rotating the linear pipe is connected to the rotatable pipe. A rotary pipe formed by fixing the pipe to the straight pipe and extending from the base end to the fixed pipe side, a sliding ring fitted to a first sliding surface provided on the rotary pipe, and for stopping the sliding ring In front of the rotating tube A flange provided on the fixed pipe side, an O-ring groove provided on the side of the fixed pipe of the flange, a cup part for housing the rotary pipe and the sliding ring, and a second slide provided in the cup part An O-ring attached to the O-ring groove so as to contact the surface, a fixed pipe extending from the outer surface of the cup part to the fixed pipe, a female thread part provided on the straight pipe side of the cup part, It is characterized by comprising a holding nut having a threaded portion for screwing into the female threaded portion .

The invention according to claim 2 is characterized in that a support-enhanced sliding ring that is adjacent to the sliding ring via a spacer and that strengthens the support of the rotary tube is fitted to the first sliding surface .

In the invention according to claim 3, paint pipes, a plurality of rotatable tubing, these rotatable pipe, together are aligned and parallel and adjacent to each other, Ru is driven by a single driving source provided in the rotation mechanism It is characterized by that.

In the invention according to claim 1, the paint pipe includes a rotatable pipe including a straight pipe and a rotary joint provided at both ends thereof, and the rotatable pipe is rotated by a rotation mechanism. When the straight pipe is rotated, the internal paint is stirred up and down. By this stirring, separation and sedimentation of the paint components can be prevented.
Therefore, according to the first aspect of the present invention, it is possible to provide a paint supply apparatus that can suppress the sedimentation of the paint in the pipe without increasing the flow rate of the paint.
In addition, in the invention according to claim 1, the sliding ring, the cup portion, and the holding nut are stationary members, that is, non-rotating members.
On the other hand, the rotating tube and the O-ring are rotating members. Therefore, when the straight pipe is turned, the rotary pipe and the O-ring are rotated in the cup portion.
At this time, since the O-ring that slides on the second sliding surface exhibits a sealing action, there is no fear that the paint leaks. The sliding ring plays a role of supporting the rotating rotary tube.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a paint supply apparatus according to the present invention. A paint supply apparatus 10 is provided with a paint booth from a paint pump 14 connected to a paint tank 12 placed in a paint preparation chamber 11 via an equipment connection pipe 13. The paint pipes 20 are arranged up to the eight paint guns 16 placed on 15, and the paint in the paint tank 12 is supplied to the paint guns 16 through the paint pipes 20. The excess paint is returned to the paint tank 12 through the paint pipe 20. The paint pipe 20 includes a paint circulation pipe (hereinafter referred to as a circulation pipe) 20 A and a paint circulation return pipe (hereinafter referred to as a circulation return pipe). 20B, and a surplus paint return pipe (hereinafter referred to as a surplus return pipe) 20C.
17 ... is a supply branch pipe, 18 ... is a surplus return branch pipe, 19 ... is a valve.

FIG. 2 is an enlarged view of part 2 of FIG. 1, and a rotatable pipe 21 is provided in each of the circulation-bound pipe 20A, the circulation return pipe 20B, and the surplus return pipe 20C.
The rotatable pipe 21 includes a straight pipe 22 extending in the left-right direction in the figure, and rotary pipe joints 30 and 30 provided at both ends of the straight pipe 22, and is configured to be rotated by a rotating mechanism 50.
The detailed structure of the rotary pipe joint 30 will be described in the next figure.

The rotating mechanism 50 includes an electric motor 52 as a power source attached to a support member 51 fixed to the surplus return pipe 20 </ b> C, a drive gear 53 attached to the shaft end of the electric motor 52, and an extra return pipe 20 </ b> C so as to mesh with the drive gear 53. A first driven gear 54 attached to the straight pipe 22, a second driven gear 55 attached to the straight pipe 22 of the circulation return pipe 20 B so as to mesh with the first driven gear 54, and a second driven gear 55 so as to mesh with the second driven gear 55. The third driven gear 56 is attached to the straight piping 22 of the circulating piping 20A.
57 is a support plate, 58... Are bolts, 59... Are nuts, 61.

  Although the power transmission means of the rotation mechanism 50 has been described using gears, it can be configured with sprockets and chains, V-belts and V-pulleys, and can be changed to other mechanisms.

In addition, as indicated by the white arrow, the paint flows toward the right in the circulation pipe 20A, flows to the left in the circulation return pipe 20B, and flows to the left in the surplus return pipe 20C.
Next, the detailed structure of the rotary joint 30 will be described.

FIG. 3 is a cross-sectional view of the rotary pipe joint according to the present invention. The rotary pipe joint 30 includes a rotary pipe 32 formed by fixing the base end 31 to the straight pipe 22 and extending leftward in the figure, and the rotary pipe 32. The sliding rings 34 and 35 made of, for example, polytetrafluoroethylene to be fitted to the provided first sliding surface 33, the flange 36 provided at the tip of the rotary tube 32 to stop the sliding ring 34, and the flange 36 The O-ring groove 38 provided in the front end surface 37 of the metal plate, the cup portion 39 that houses the rotary tube 32 and the sliding rings 34 and 35, and the second sliding surface 41 provided inside the cup portion 39 so as to be in contact with each other. An O-ring 42 attached to the O-ring groove 38, a fixed pipe 44 extending from the outer bottom surface 43 of the cup part 39 to the tip of the fixed pipe 61, a female screw part 45 provided at the tip of the cup part 39, and this female screw Screw at the tip to screw into part 45 It consists retainer nut 47. comprising 46.
Reference numeral 48 denotes a spacer.

In the figure, the sliding rings 34 and 35, the cup portion 39, the holding nut 47, and the spacer 48 are stationary members, that is, non-rotating members.
On the other hand, the rotating tube 32 and the O-ring 42 are rotating members. Therefore, when the straight pipe 22 is turned, the rotary pipe 32 and the O-ring 42 are rotated in the cup portion 39.
At this time, since the O-ring 42 that slides on the second sliding surface 41 exhibits a sealing action, there is no fear of paint leakage. The sliding rings 34 and 35 serve to support the rotating rotary tube 32.

The configuration of the rotary pipe joint 30 is not limited to this. For example, the sliding rings 34 and 35 can be changed to rolling bearings, so that the configuration can be changed to other configurations.
Next, the operation of the rotatable pipe of the paint supply apparatus having the above configuration will be described.

  In FIG. 2, when the electric motor 52 is started and the drive gear 53 is rotated as indicated by an arrow, the first driven gear 54 rotates, and the rotation of the first driven gear 54 rotates the second driven gear 55. The third driven gear 56 is rotated by the rotation of the second driven gear 55. By the rotation of these gears, the straight pipes 22, 22, 22 that are integral with the gears can rotate as indicated by arrows. At the same time, the paint passes through the respective straight pipes 22, 22, 22 as indicated by white arrows. At this time, since the paint flows according to the rotation of each of the straight pipes 22, 22, 22, the internal paint is stirred up and down. By this stirring, separation and sedimentation of the paint components can be prevented.

Therefore, the rotatable pipe 21 including the straight pipe 22 and the rotary pipe joints 30 and 30 provided at both ends of the paint pipe 20 is rotated by the rotating mechanism 50. When the straight pipe 22 is rotated, the internal paint is stirred up and down. By this stirring, separation and sedimentation of the paint components can be prevented.
From the above, it is possible to provide a paint supply device that can suppress sedimentation of the paint in the pipe without increasing the flow rate of the paint.

  In addition, when the straight pipe 22 of the rotatable pipe 21 is provided in a direction intersecting with the vertical pipe (vertical pipe) of the paint pipe 20, for example, when these are rotated and rotated, the paint components are separated. It is effective for prevention and settling prevention.

Next, a reference example of the paint supply device will be described below.
FIG. 4 is a cross-sectional view of an essential part of a paint pipe adopted in another paint supply apparatus. According to this reference example, the paint pipe can be prevented from being separated or settled while being a non-rotating pipe. That is, the straight pipe 71 that is a part of the paint pipe 70 is provided with a swirl flow portion 72 that converts the flow of paint into a swirl flow.
The swirl flow part 72 has a convex cross section that protrudes from the outside to the inside in the straight pipe 71, and is formed by a continuous spiral trajectory.

  FIG. 5 is an operation diagram of FIG. 4. When the paint passes through the straight pipe 71 from the left to the right in the figure, a swirl flow as shown by an arrow is generated by the swirl flow section 72 in the paint flow. This swirl flow can prevent separation and settling of the paint components in the pipe.

As described above, the paint pipe 70 includes the swirl flow portion 72 that converts the paint flow into a swirl flow in the straight pipe 71 that is a part of the paint pipe 70. Since the swirling flow part 72 swirls the paint, it is possible to prevent separation and settling of the paint components.
In addition, since the swirl flow part 72 does not require a power source, the running cost of the paint supply device can be reduced.

Next, a reference example in which the swirl flow portion is formed of a spiral groove will be described below.
Figure 6 is a perspective view showing the helical grooves of the paint pipe employing a different paint supply device further, according to this reference example, to form a swirling flow portion by pressing the roller to the outer surface of the paint pipe Can do. That is, the swirling flow part is a spiral groove formed by pressing a roller from outside to inside a cylindrical pipe material.

In (a), the state which prepared the straight piping 81 which is a cylindrical piping material is shown.
In (b), the support rolls 82 and 83 are each rotated in the direction of the arrow while the straight pipe 81 is placed on the rotatable support rolls 82 and 83. At the same time, the grooving roll 84 is rotated as indicated by the arrow and pressed against the outer surface of the straight pipe 81. By rotating the support rolls 82 and 83 continuously, the straight pipe 81 is moved in the direction of the white arrow.

  In (c), the spiral groove 85 is formed by pressing the groove processing roll 84 on the outer surface of the straight pipe 81. The structure of the straight pipe 81 provided with the spiral groove 85 is the same as the structure of the straight pipe (reference number 71 in FIG. 4) provided with the swirl flow part (reference number 72 in FIG. 4). Therefore, the spiral groove 85 can generate a swirl flow in the paint flow similarly to the swirl flow portion.

  Accordingly, the swirl flow portion 72 is a spiral groove 85 formed by pressing the groove processing roll 84 from the outside to the inside of, for example, a cylindrical pipe material. The cylindrical piping material is a material that is widely distributed in the market, so it is easily available and inexpensive. Therefore, an inexpensive paint supply apparatus can be realized. Further, since the swirl flow part 72 is integrally formed with the cylindrical pipe material, there is no fear that the swirl flow part 72 falls off the pipe material as compared with the case where the swirl flow part 72 is retrofitted. As a result, stable operation can be continued.

  In addition, the rotatable piping in Claim 1 should just be any of horizontal piping, vertical piping, and inclination piping, and does not limit a specific kind.

Swivel flow portion may be a pivot ribbon inserted into the paint pipe, or a swirling flow portion integrally formed in the pipe, or retrofitting it is arbitrary.

  The paint supply device of the present invention is suitable for a paint supply device used in a painting process of an automobile body.

It is a perspective view of the coating material supply apparatus which concerns on this invention. FIG. 2 is an enlarged view of part 2 of FIG. 1. It is sectional drawing of the rotary pipe joint which concerns on this invention. It is principal part sectional drawing of the paint piping employ | adopted as another paint supply apparatus. It is an effect | action figure of FIG. Is a perspective view showing the helical grooves of the paint pipe employing a different paint supply device further. It is a figure explaining the basic composition of the conventional technology.

Explanation of symbols

10 ... paint supply device, 11 ... paint formulation chamber, 12 ... paint tank, 15 ... coating booth, 16 ... coating gun, 2 0 ... paint pipe, 21 ... rotatable pipe, 2 2 ... straight piping, 30 ... rotary tube Coupling , 31 ... proximal end, 32 ... rotary tube, 33 ... first sliding surface, 34 ... sliding ring, 35 ... supporting reinforcing sliding ring, 36 ... collar, 37 ... side surface of fixed pipe, 38 ... O-ring groove , 39 ... Cup part, 41 ... Second sliding surface, 42 ... O-ring, 43 ... Outer surface, 44 ... Fixed tube, 45 ... Female thread part, 46 ... Male thread part, 47 ... Presser nut, 48 ... Spacer, 50 ... rotating mechanism, 52 ... drive source, 61 ... fixed piping.

Claims (3)

Paint formulation chamber (11) to the paint tank placed in (12), until the coating gun placed in the coating booth (15) (16), the paint pipe (20) is disposed, the coating material pipe (20) supplied paint of the paint tank (12) is to the painting gun (16) through, the excess paint is returned to the paint tank (12) through the paint pipe (20),
The paint pipe (20), a straight line pipe (22) and rotatable pipe consisting rotating pipe fittings (30, 30) provided at both ends of the straight pipe (22) (21) with free Murrell, said rotating Includes fixed piping (61, 61) connected to both ends of the possible piping (21),
In the paint supply device (10) in which a rotating mechanism (50) for rotating the linear pipe (22 ) is connected to the rotatable pipe (21) ,
The rotary pipe joint (30) includes a rotary pipe (32) formed by fixing a base end (31) to the straight pipe (22) and extending from the base end (31) to the fixed pipe (61) side. , A sliding ring (34) fitted to a first sliding surface (33) provided on the rotary pipe (32), and the fixed pipe of the rotary pipe (32) to stop the sliding ring (34) ( 61) a flange portion (36) provided on the side, an O-ring groove (38) provided on a fixed pipe side surface (37) of the flange portion (36), the rotating tube (32) and the sliding ring (34). A cup portion (39) to be stored, an O-ring (42) attached to the O-ring groove (38) so as to be in contact with a second sliding surface (41) provided inside the cup portion (39), Fixation extending from the outer surface (43) of the cup part (39) to the fixed pipe (61) (44), a female screw part (45) provided on the straight pipe (22) side of the cup part (39), and a holding nut having a screw part (46) for screwing into the female screw part (45) (47) The coating material supply apparatus characterized by comprising. Before Symbol first sliding surface (33), wherein the rotary tube with an adjacent via a spacer (48) to the sliding ring (34) (32) supporting reinforced sliding ring to enhance the support of (35) The paint supply apparatus according to claim 1, wherein the paint supply apparatus is fitted . The paint pipe (20) includes a plurality of the rotatable pipes (21),
These rotatable pipe (21), together with is aligned and parallel and adjacent to each other, according to claim 1 wherein is driven by the rotation mechanism single driving source provided in the (50) (52), characterized in Rukoto or The paint supply apparatus according to claim 2 .

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