JP4668691B2 - Hopper for washing machine - Google Patents

Description

  The present invention relates to a coating machine cleaning hopper used when cleaning a coating machine.

  In general, a painting robot is mainly used for painting an object such as an automobile body. This painting robot includes an arm that bends, stretches and rotates when painting an object to be painted, and a coating machine that is equipped at the tip of the arm. The painting machine is equipped with a bell-shaped rotary atomizing head. In addition to the operation of painting an object to be coated, the painting robot also performs an operation of blowing off surplus paint generated during color change into a waste paint collection container (for example, see Patent Document 1). Yes.

  As such a waste paint collection container, for example, a coating machine washing hopper 41 as shown in FIG. 5 has been proposed. The hopper body 42 constituting the coating machine washing hopper 41 has an insertion hole 45 in the upper part. Then, in the state where the rotary atomizing head 44 of the coating machine 43 is inserted into the hopper body 42 through the insertion hole 45, the paint in the coating machine 43 is blown away.

  By the way, since the paint atomized by the coating machine 43 is extremely light, it is easily affected by the surrounding air current. In particular, when the rotary atomizing head 44 is rotated at a high speed, an ascending air current is generated around the rotary atomizing head 44 and the paint soars, so that the soared paint adheres to the rotary atomizing head 44 and is immediately soiled. In order to solve this problem, conventionally, shaping air is injected from the periphery of the rotary atomizing head 44 to suppress the upward airflow.

However, when the shaping air is injected, the shaping air may generate another updraft, and the paint particles may rise under the influence of the updraft. Therefore, it is conceivable to provide an airflow adjusting plate 46 at a position below the insertion hole 45 in the hopper body 42 instead of injecting the shaping air (see FIG. 5). Thereby, the updraft which makes a paint particle rise can be interrupted | blocked.
JP 2000-189849 A (FIG. 1 etc.)

  By the way, the paint atomized by the rotary atomizing head 44 rebounds by contacting the airflow adjusting plate 46 and contacts the upper back surface of the hopper main body 42. Along with the flow of the paint particles, a vortex is generated in the vicinity of the insertion hole 45 in the hopper body 42, and a staying portion A1 is formed there. Further, stagnation occurs in the vicinity of the connection portion between the upper portion and the side wall in the hopper main body 42, and a staying portion A2 is formed there. The vicinity of the stay portions A1 and A2 in the hopper main body 42 is likely to become dirty because the paint adheres intensively. Therefore, it is necessary to frequently clean the inside of the hopper body 42.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a coating machine cleaning hopper that can reduce the frequency of cleaning by reducing the concentration of dirt in the hopper body. is there.

Means (Means 1) for solving the above-mentioned problems include a hopper body having an opening at the upper end and an upper lid that covers the opening, and the upper lid is rotatably provided in the coating machine. A sprayer cleaning hopper having an insertion hole into which the atomizing head can be inserted into the hopper body, and an airflow adjusting member for adjusting the airflow in the hopper body is located below the insertion hole. The inside diameter of the insertion hole is increased from the center portion of the insertion hole to the upper opening end, and is increased from the center portion to the lower opening end. hopper there Ru.

Therefore, according to the means 1 , since the inner diameter of the insertion hole increases from the center of the insertion hole to the upper end opening and the lower opening end, the rotational atomization inserted into the hopper body through the insertion hole When the head is rotated at a high speed, air smoothly flows along the inner peripheral surface of the insertion hole, and then flows smoothly along the back surface of the upper lid. As a result, eddy currents are less likely to be generated in the vicinity of the insertion hole of the upper lid, so that dirt is less likely to concentrate in the vicinity of the insertion hole. Therefore, since the concentration of dirt in the hopper body can be reduced, the frequency of cleaning the hopper for washing the coating machine can be reduced.

The invention according to claim 1 includes a hopper body having an opening at an upper end portion, and an upper lid that covers the opening, and the upper lid includes a rotary atomizing head that is rotatably provided in a coating machine. have insertable insertion holes in the body, the air flow adjusting plate as the air flow adjusting member for adjusting the air flow in the hopper body is provided so as to be positioned below the insertion hole, the outside of the air flow adjusting plate A hopper for washing a coating machine having a dimension larger than the inner diameter of the insertion hole , wherein the upper lid has a substantially concave concave back surface and is formed on the side wall side of the hopper body from the inner peripheral surface of the insertion hole. The gist of the coating machine washing hopper is characterized in that it gradually increases in thickness as it goes and the back surface of the upper lid smoothly continues to the inner peripheral surface of the side wall .

Therefore, according to the first aspect of the present invention, since the upper cover back surface is formed in a substantially concave shape, the upper cover back surface and the inner peripheral surface of the hopper main body are smoothly continuous. Therefore, air flows smoothly from the upper lid back surface along the inner peripheral surface of the hopper body. As a result, it is difficult for stagnation to occur near the connection portion between the back surface of the upper lid and the inner peripheral surface of the hopper body, and dirt is less likely to concentrate near the connection portion. Therefore, since the concentration of dirt in the hopper body can be reduced, the frequency of cleaning the hopper for washing the coating machine can be reduced.

The invention according to claim 2 includes a hopper body having an opening at an upper end portion and an upper lid covering the opening, and the upper lid includes a rotary atomizing head provided rotatably in a coating machine. have insertable insertion holes in the body, the air flow adjusting plate as the air flow adjusting member for adjusting the air flow in the hopper body is provided so as to be positioned below the insertion hole, the outside of the air flow adjusting plate A coating machine cleaning hopper having a dimension larger than the inner diameter of the insertion hole, wherein the inner diameter of the insertion hole is increased from the center of the insertion hole toward the upper opening end, and the lower opening is opened from the center. The upper lid is formed so that the back surface of the upper lid is formed in a substantially concave shape and gradually increases in thickness from the inner peripheral surface of the insertion hole toward the side wall of the hopper body. The upper lid Plane as its gist sprayer cleaning hopper, characterized in that smoothly continuous with the inner peripheral surface of the side wall.

Therefore, according to the second aspect of the invention, the inner diameter of the insertion hole increases from the center of the insertion hole toward the upper end opening and the lower opening end. When the inserted rotary atomizing head is rotated at a high speed, air flows smoothly along the inner peripheral surface of the insertion hole, and then flows smoothly along the back surface of the upper lid. As a result, eddy currents are less likely to be generated in the vicinity of the insertion hole of the upper lid, so that dirt is less likely to concentrate in the vicinity of the insertion hole. Moreover, since the upper lid rear surface is formed in a substantially concave shape, the upper lid rear surface and the inner peripheral surface of the hopper main body are smoothly continuous. Therefore, air flows smoothly from the upper lid back surface along the inner peripheral surface of the hopper body. As a result, it is difficult for stagnation to occur near the connection portion between the back surface of the upper lid and the inner peripheral surface of the hopper body, and dirt is less likely to concentrate near the connection portion. Therefore, since the concentration of dirt in the hopper body can be reduced, the frequency of cleaning the hopper for washing the coating machine can be reduced.

The invention according to claim 3 is provided with a hopper body having an opening at an upper end and an upper lid covering the opening, and the upper lid includes a rotary atomizing head provided rotatably in a coating machine. have insertable insertion holes in the body, the air flow adjusting plate as the air flow adjusting member for adjusting the air flow in the hopper body is provided so as to be positioned below the insertion hole, the outside of the air flow adjusting plate A coating machine cleaning hopper having a dimension larger than the inner diameter of the insertion hole, the thickness of the peripheral portion of the insertion hole in the upper lid being set to 5 mm or more and 20 mm or less, and the inner peripheral surface of the insertion hole, A curve appearing at the portion corresponding to the inner peripheral surface of the insertion hole in the cut surface obtained by cutting the upper lid in the thickness direction is formed to be approximately 1.0 times the thickness while being formed in a substantially convex shape toward the center of the insertion hole. More than 1.5 times the diameter Is intended to include an arc, to form a top cover back surface in a substantially concave shape, the curves appearing in the upper cover rear surface portion corresponding in the cut surface, is intended to include 150mm or less of the radius of the arc above 50 mm, an inner periphery of the upper lid rear surface and the side wall The gist of the hopper for washing a coating machine is characterized in that the surface is smoothly continuous .

Therefore, according to the invention described in claim 3 , the thickness of the peripheral portion of the insertion hole in the upper lid is set to 5 mm or more and 20 mm or less, and the inner peripheral surface of the insertion hole in the cut surface obtained by cutting the upper lid in the thickness direction. A curve appearing in the corresponding portion includes an arc having a diameter of 1.0 to 1.5 times the thickness. For this reason, when the rotary atomizing head inserted into the hopper body through the insertion hole is rotated at a high speed, air smoothly flows from the inner peripheral surface of the insertion hole along the back surface of the upper lid. As a result, eddy currents are less likely to be generated in the vicinity of the insertion hole of the upper lid, so that dirt is less likely to concentrate in the vicinity of the insertion hole. Further, the back surface of the upper lid is formed in a substantially concave shape, and the curve appearing in the portion corresponding to the back surface of the upper lid in the cut surface includes an arc having a radius of 50 mm or more and 150 mm or less. Therefore, the back surface of the upper lid and the inner peripheral surface of the hopper body are smoothly continuous, so that air flows smoothly from the rear surface of the upper lid along the inner peripheral surface of the hopper body. As a result, it is difficult for stagnation to occur near the connection portion between the back surface of the upper lid and the inner peripheral surface of the hopper body, and dirt is less likely to concentrate near the connection portion. Therefore, since the concentration of dirt in the hopper body can be reduced, the frequency of cleaning the hopper for washing the coating machine can be reduced.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the upper lid is detachably attached to the hopper body, and the air flow adjusting member is provided on the upper lid. This is the gist.

Therefore, according to the invention described in claim 4 , since the upper lid is detachably attached to the hopper body, the inside of the hopper for washing the coating machine can be easily cleaned by removing the upper lid, The airflow adjusting member can also be cleaned. Moreover, since the airflow adjustment member is provided on the upper lid, the positional relationship between the airflow adjustment member and the upper lid is kept constant regardless of the state of attachment of the upper lid. Therefore, it is possible to prevent deterioration in the function of the hopper for washing the coating machine due to the change in the air flow in the hopper body according to the attachment state of the upper lid.

As described above in detail, according to the invention described in claims 1 to 4 , it is possible to provide a hopper for washing a coating machine that can reduce the frequency of cleaning by reducing the concentration of dirt in the hopper body. it can. In particular, according to the fourth aspect of the present invention, it is possible to prevent deterioration in the function of the hopper for washing the coating machine due to the change in the airflow in the hopper body depending on the state of attachment of the upper lid.

  Hereinafter, an embodiment of a coating machine washing hopper embodying the present invention will be described in detail with reference to FIGS.

  As shown in FIGS. 1 and 2, the coating machine cleaning hopper 2 is for cleaning the coating machine 4 attached to, for example, a coating robot. The coating machine 4 is used when a painting operation is performed on an object to be painted (not shown) such as an automobile body. The coating machine 4 includes a substantially cylindrical coating machine main body 32 and a bell-shaped rotary atomizing head 30. The coating machine main body 32 includes a paint container (not shown) filled with paint and a paint supply mechanism (not shown) for supplying the paint in the paint container to the rotary atomizing head 30. The rotary atomizing head 30 is attached to the coating machine main body 32 and is rotated by an atomizing head rotating motor provided in the coating machine main body 32. When the rotary atomizing head 30 rotates, the coating material supplied by the coating material supply mechanism is scattered and atomized by the centrifugal force to the outer peripheral side. Further, the rear portion 33 of the rotary atomizing head 30 has a substantially cylindrical shape, and the front portion 31 of the rotary atomizing head 30 has a rear surface (tapered surface) 31a whose outer diameter increases toward the front end. .

  As shown in FIGS. 1 and 2, the coating machine cleaning hopper 2 has a function of collecting a cleaning liquid such as water and a function of collecting paint blown off from the coating machine 4 at the time of color change. Yes. As shown in FIGS. 1 to 3, the coating machine washing hopper 2 includes a hopper body 23 having a substantially cylindrical shape and an upper lid 24 having a substantially circular shape in a top view. In the present embodiment, since the hopper body 23 and the upper lid 24 are made of stainless steel, it is possible to prevent the occurrence of rust due to the cleaning liquid. The hopper body 23 has an opening 23a at the upper end and a waste liquid discharge port (not shown) for discharging the waste liquid in the hopper body 23 at the lower end. On the outer peripheral side of the opening 23 a of the hopper main body 23, an edge 23 b that protrudes toward the outer peripheral side of the hopper main body 23 is provided.

  On the other hand, the upper lid 24 is set to have a diameter substantially the same as the outer diameter of the hopper body 23, and is attached to the hopper body 23 so as to cover the opening 23a. Specifically, the upper lid 24 is attached to the hopper body 23 by inserting a bolt 26 through the outer peripheral portion 25 of the upper lid 24 and the edge portion 23b of the hopper body 23 and fastening a nut 27 to the tip of the bolt 26. It is done. That is, the upper lid 24 is detachably attached to the hopper body 23. In addition, an insertion hole 22 through which the rotary atomizing head 30 can be inserted into the hopper body 23 is provided at the center of the upper lid 24. The insertion hole 22 has a circular shape, and the inner diameter thereof is set to such a size that a gap of 10 mm or more and 50 mm or less is generated between the inserted rotary atomizing head 30.

  As shown in FIGS. 1 to 3, the thickness t1 (see FIGS. 2 and 3) of the peripheral portion of the insertion hole 22 in the upper lid 24 is set to be thicker than the conventional one illustrated in FIG. In the form, it is set to about 8 mm (by the way, conventionally, it is set to about 2 mm). Further, the connecting portion between the upper lid surface 24a and the inner peripheral surface of the insertion hole 22 (the upper opening edge of the insertion hole 22) is chamfered, and the connecting portion between the upper lid rear surface 24b and the inner peripheral surface (the lower side of the insertion hole 22). The opening edge is chamfered. For this reason, the inner peripheral surface of the insertion hole 22 is formed in a substantially convex shape toward the center of the insertion hole 22. That is, the inner diameter of the insertion hole 22 increases from the center of the insertion hole 22 toward the upper opening end, and increases from the center of the insertion hole 22 toward the lower opening end.

  Further, the upper lid 24 is formed such that the upper lid rear surface 24b is formed in a substantially concave shape and gradually becomes thicker from the inner peripheral surface of the insertion hole 22 toward the side wall 23c of the hopper body 23. In the cut surface obtained by cutting the upper lid 24 in the thickness direction, a curve that appears in a portion of the upper lid rear surface 24b near the side wall 23c includes an arc C1 having a radius of about 100 mm (see FIGS. 1 and 3).

  As shown in FIGS. 1 and 2, an airflow adjustment plate 11 (airflow adjustment member) that adjusts the airflow in the hopper body 23 is provided in the hopper body 23. The airflow adjustment plate 11 is disposed below the insertion hole 22 and below the rotary atomizing head 30 inserted into the hopper body 23. In this embodiment, the distance between the upper lid back surface 24b near the insertion hole 22 and the upper surface of the airflow adjustment plate 11 is set to about 30 mm, and the distance between the front end of the rotary atomizing head 30 and the upper surface of the airflow adjustment plate 11 is It is set to about 20 mm. The airflow adjustment plate 11 has a substantially disc shape, and the outer diameter of the airflow adjustment plate 11 is set larger than the inner diameter of the insertion hole 22. Incidentally, although the outer diameter of the conventional airflow adjusting plate illustrated in FIG. 5 is about 200 mm, the outer diameter of the airflow adjusting plate 11 of the present embodiment is set to about 240 mm. The airflow adjustment plate 11 is connected to the upper lid 24 via a plurality of (four in this embodiment) support columns 13 (columnar members). Specifically, the bolt 14 inserted through the upper lid 24 is fastened to the upper end portion of the support column 13, and the bolt 15 inserted through the air flow adjusting plate 11 is fastened to the lower end portion of the support column 13. Connected to the upper lid 24. Since the support pillars 13 having the same length are used, the airflow adjustment plate 11 is parallel to the upper lid 24 (specifically, the upper lid surface 24a). Further, the support columns 13 are arranged at equal intervals (90 ° intervals in the present embodiment) on the outer peripheral portion of the airflow adjustment plate 11. Thereby, the flow of air flowing in from the insertion hole 22 is not easily disturbed by the support pillar 13. Moreover, since the airflow adjustment plate 11 is accurately positioned by the support pillars 13, the airflow adjustment plate 11 can be fixed in a stable state. In addition, a circular air hole 12 is provided at the center of the airflow adjusting plate 11. The air vent 12 serves as a passage for supplying air from below the airflow adjusting plate 11 to a negative pressure portion generated immediately below the rotary atomizing head 30. The inner diameter of the vent hole 12 is set smaller than the outer diameter of the rotary atomizing head 30.

  Next, the operation of the coating machine cleaning hopper 2 will be described.

  First, when the painting of the object to be painted by the coating machine 4 is completed and it is necessary to change the color when painting the next object to be coated, the painting machine 4 is moved by driving the painting robot to rotate and atomize. The head 30 is inserted into the coating machine cleaning hopper 2 through the insertion hole 22. At this time, the rotary atomizing head 30 is inserted so that the front end is located approximately 20 mm above the upper surface of the airflow adjusting plate 11. Then, the atomizing head rotating motor is driven to rotate the rotating atomizing head 30 at 15000 rpm, and the paint in this state is sprayed into the coating machine cleaning hopper 2 by spraying the paint. .

  At this time, the paint atomized by the rotary atomizing head 30 flows toward the airflow adjusting plate 11, but is affected by the centrifugal force generated when the rotary atomizing head 30 rotates, and is radially outside the rotary atomizing head 30. Also flows. As a result, the coating particles bounce back in contact with the upper part B1 (see FIG. 2) of the airflow adjusting plate 11, and flow toward the upper lid rear surface 24b side of the upper lid 24 (see arrow F1 in FIGS. 1 and 2).

  Further, as the paint particles flow in the direction of arrow F1, a region B2 (see FIG. 2) in the vicinity of the insertion hole 22 in the hopper body 23 becomes a negative pressure portion. Thereby, the air outside the hopper 2 for washing the coating machine flows into the region B2 in the hopper body 23 through the insertion hole 22 (see arrow F2 in FIG. 2). At this time, the air flowing into the hopper main body 23 flows so as to wrap around the inner peripheral surface of the insertion hole 22 formed in a substantially convex shape toward the upper lid rear surface 24b side, so that the vortex flow in the region B2 due to air separation Occurrence is suppressed. Therefore, it becomes difficult for dirt to adhere to the back surface 24b of the upper lid near the insertion hole 22.

  Further, the paint particles that have reached the upper lid rear surface 24b of the upper lid 24 flow toward the side wall 23c of the hopper body 23 along the upper lid rear surface 24b (see arrow F1). Since the upper lid back surface 24b is formed in a substantially concave shape and the upper lid back surface 24b and the inner peripheral surface of the side wall 23c are smoothly continuous, the paint particles smoothly flow from the upper lid rear surface 24b along the inner peripheral surface of the side wall 23c. . Therefore, it is difficult for stagnation to occur in the vicinity of the connection portion between the upper lid back surface 24b and the inner peripheral surface of the side wall 23c, so that the adhesion of dirt to the connection portion (arc C1 portion) can be suppressed.

  When the cleaning operation is completed, the driving of the atomizing head rotating motor is stopped to stop the rotating atomizing head 30, and the paint container in the coating machine main body 32 is filled with the next color paint to perform color change. Thereafter, the painting robot 4 is raised by driving the painting robot to move the rotary atomizing head 30 to the outside of the hopper 2 for washing the painting machine. Subsequently, the painting robot moves the painting machine 4 to the painting work start position and starts painting the next object to be painted.

  Therefore, according to the present embodiment, the following effects can be obtained.

  (1) According to the coating machine cleaning hopper 2 of the present embodiment, the peripheral portion of the insertion hole 22 is set to be thicker than the conventional one (see FIG. 5), and the upper end opening edge and the lower end opening edge of the insertion hole 22 are It is chamfered. For this reason, the air flowing in the vicinity of the insertion hole 22 is less likely to be disturbed, and dirt is less likely to concentrate on the upper lid rear surface 24b in the vicinity of the insertion hole 22. Moreover, the upper cover back surface 24b is formed in a substantially concave shape, and the upper cover back surface 24b and the inner peripheral surface of the side wall 23c are smoothly continuous. For this reason, it becomes difficult to produce a stagnation in the connection part of the upper cover back surface 24b and the inner peripheral surface of the hopper main body 23, and dirt becomes difficult to concentrate on the connection part vicinity. Therefore, the frequency of cleaning the coating machine cleaning hopper 2 can be reduced.

  In addition, since the paint particles easily flow downward without remaining in the upper part of the hopper body 23 (in the vicinity of the insertion hole 22 or in the vicinity of the connection portion between the upper lid back surface 24b and the inner peripheral surface of the hopper body 23), the rotation atomization It is also possible to prevent the coating machine 4 from being soiled by the coating particles adhering to the head 30.

  (2) The airflow adjustment plate 11 of this embodiment has a larger outer diameter than that of the conventional one, and the outer diameter is set to about 240 mm. Therefore, since the paint particles adhering to the upper part B1 of the airflow adjusting plate 11 are spread on the airflow adjusting plate 11 and are less likely to be deposited, the airflow adjusting plate 11 is less likely to become dirty than the conventional one. Therefore, the frequency of cleaning the airflow adjusting plate 11 can be reduced.

  In addition, you may change embodiment of this invention as follows.

  In the above embodiment, the inner peripheral surface of the insertion hole 22 is formed in a substantially convex shape toward the center of the insertion hole 22 by chamfering the upper opening edge and the lower opening edge of the insertion hole 22. However, for example, as shown in FIG. 4 (a), the inner peripheral surface of the insertion hole 22 is a portion corresponding to the upper opening edge and the lower opening edge of the insertion hole 22 on the cut surface obtained by cutting the upper lid 24 in the thickness direction. It is good also as a shape where a curve appears. In other words, the upper opening edge and the lower opening edge of the insertion hole 22 may have a rounded shape. Further, as shown in FIG. 4B, the entire inner peripheral surface of the insertion hole 22 may have a rounded shape. Specifically, the curve appearing at the portion corresponding to the inner peripheral surface of the insertion hole 22 on the cut surface may include an arc having a diameter of about 1.2 times the thickness t1.

  -Although the upper cover 24 of the said embodiment was stainless steel, you may be formed with the other metal material. The upper lid 24 may be formed of a material other than a metal material, for example, a solvent-resistant rubber material (butyl rubber (IIR), fluorine rubber (FPM), etc.).

  In the above embodiment, the air flow adjusting plate 11 and the upper lid 24 may be integrally formed.

  In the above embodiment, the airflow adjustment plate 11 is connected to the upper lid 24 using the bolts 14 and 15 via the support column 13. However, the method of connecting the airflow adjustment plate 11 to the upper lid 24 may be changed. For example, the airflow adjustment plate 11 may be connected to the upper lid 24 by bonding the support column 13 and the upper lid 24 using an adhesive and bonding the support column 13 and the airflow adjustment plate 11.

  Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the embodiment described above are listed below.

  (1) In any one of claims 1 to 5, the airflow adjusting member has a substantially disk shape, and the outer diameter of the airflow adjusting member is larger than the inner diameter of the insertion hole.

  (2) In any one of claims 1 to 5, the upper lid is formed so as to gradually increase in thickness from the inner peripheral surface of the insertion hole toward the side wall of the hopper body.

  (3) In any one of claims 1 to 5, an edge portion is provided on the outer peripheral side of the opening of the hopper body, and a bolt is inserted between the outer peripheral portion and the edge portion of the upper lid, and the bolt The upper lid is attached to the hopper body by fastening a nut to the tip of the hopper.

  (4) In any one of claims 1 to 5, the air flow adjusting member is connected to the upper lid via a plurality of columnar members.

  (5) A hopper main body having an opening at the upper end and an upper lid that covers the opening, and the upper lid is capable of inserting a rotary atomizing head rotatably provided in the coating machine into the hopper main body. An airflow adjusting member that has an insertion hole and adjusts the airflow in the hopper body is a hopper for washing a coating machine provided so as to be positioned below the insertion hole. A hopper for washing a coating machine, wherein a connecting portion with a peripheral surface is chamfered, a connecting portion between a rear surface of the upper lid and the inner peripheral surface is chamfered, and the rear surface of the upper lid is formed in a substantially concave shape.

  (6) A hopper main body having an opening at the upper end and an upper lid covering the opening, and the upper lid can insert a rotary atomizing head rotatably provided in the coating machine into the hopper main body. An airflow adjusting member that has an insertion hole and adjusts the airflow in the hopper main body is a coating machine cleaning hopper provided so as to be positioned below the insertion hole, the upper opening edge of the insertion hole and A hopper for washing a coating machine, wherein the lower opening edge is chamfered and the back surface of the upper lid is formed in a substantially concave shape.

The schematic sectional drawing which shows the hopper for a coating machine washing | cleaning in this embodiment, a rotary atomization head, etc. FIG. The principal part sectional drawing which shows the hopper for a coating machine washing | cleaning, a rotary atomization head, etc. FIG. The schematic sectional drawing which shows an upper cover and an airflow adjustment board. (A) And (b) is principal part sectional drawing of the upper cover in other embodiment. The schematic sectional drawing which shows the hopper for a coating machine washing | cleaning, rotary atomization head, etc. in a prior art.

Explanation of symbols

2 ... coating machine washing hopper 4 ... coating machine 11 ... air flow adjusting plate 22 as an air flow adjusting member ... insertion hole 23 ... hopper body 23a ... opening 24 ... upper lid 24b ... upper lid back 30 ... rotary atomizing head C1 ... arc t1 …thickness

Claims (4)

A hopper body having an opening at the upper end, and an upper lid that covers the opening,
The upper lid has an insertion hole into which a rotary atomizing head provided rotatably in a coating machine can be inserted into the hopper body,
An airflow adjustment plate as an airflow adjustment member for adjusting the airflow in the hopper body is provided so as to be positioned below the insertion hole, and the outer dimension of the airflow adjustment plate is larger than the inner diameter of the insertion hole. /> A sprayer washing hopper,
The upper lid is formed so that the back surface of the upper lid is formed in a substantially concave shape, and gradually increases in thickness from the inner peripheral surface of the insertion hole toward the side wall side of the hopper body. A hopper for washing a coating machine, characterized in that it smoothly continues to the inner peripheral surface of the coating machine. A hopper body having an opening at the upper end, and an upper lid that covers the opening,
The upper lid has an insertion hole into which a rotary atomizing head provided rotatably in a coating machine can be inserted into the hopper body,
An airflow adjustment plate as an airflow adjustment member for adjusting the airflow in the hopper body is provided so as to be positioned below the insertion hole, and the outer dimension of the airflow adjustment plate is larger than the inner diameter of the insertion hole. /> A sprayer washing hopper,
Increasing the inner diameter of the insertion hole from the center of the insertion hole to the upper opening end, and increasing from the center to the lower opening end,
The upper lid is formed so that the back surface of the upper lid is formed in a substantially concave shape, and gradually increases in thickness from the inner peripheral surface of the insertion hole toward the side wall side of the hopper body. A hopper for washing a coating machine, characterized in that it smoothly continues to the inner peripheral surface of the coating machine. A hopper body having an opening at the upper end, and an upper lid that covers the opening,
The upper lid has an insertion hole into which a rotary atomizing head provided rotatably in a coating machine can be inserted into the hopper body,
An airflow adjustment plate as an airflow adjustment member for adjusting the airflow in the hopper body is provided so as to be positioned below the insertion hole, and the outer dimension of the airflow adjustment plate is larger than the inner diameter of the insertion hole. /> A sprayer washing hopper,
In the upper lid, the thickness of the peripheral portion of the insertion hole is set to 5 mm or more and 20 mm or less,
The inner peripheral surface of the insertion hole is formed in a substantially convex shape toward the center of the insertion hole, and a curve appearing in a portion corresponding to the inner peripheral surface of the insertion hole in a cut surface obtained by cutting the upper lid in the thickness direction. And an arc having a diameter of 1.0 to 1.5 times the thickness,
The upper lid back surface is formed in a substantially concave shape, and the curve appearing in the portion corresponding to the upper lid rear surface in the cut surface includes an arc having a radius of 50 mm or more and 150 mm or less, and the upper lid rear surface and the inner peripheral surface of the side wall are smooth. A hopper for washing a coating machine characterized by being continuous . The coating machine cleaning according to any one of claims 1 to 3 , wherein the upper lid is detachably attached to the hopper body, and the air flow adjusting member is provided on the upper lid. For hopper.

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