JP4522354B2 - Blow clean device - Google Patents

Description

The present invention relates to a blow-cleaning device that is used when, for example, cleaning is performed by blowing off chips or the like on a machined workpiece surface.

It is publicly known to blow away chips and the like by blowing high-pressure air from the nozzle onto the surface of the workpiece.
However, when a machining worker blows air, it is necessary to shake the nozzle. Therefore, it is necessary to interrupt the machining operation and operate the air nozzle each time, and it is difficult to increase work efficiency. On the other hand, personnel costs will be increased if personnel dedicated to air blow are allocated. Therefore, it is desired that air blow can be performed without interrupting the processing operation.
It is also known to clean the sprayed surface by automatically swinging the free end of the flexible hose by attaching the flexible hose to the liquid tank and spraying the spray liquid from the flexible hose.
Noto 3069908

In the case of using the flexible hose, the flexible hose rotates. Accordingly, the injection range becomes circular, and unnecessary portions are injected, and the free swinging motion of the free end is left to be performed, so that the cleaning range cannot be made accurate and the cleaning efficiency is lowered. In addition, since the liquid tank must be held and operated, it is necessary to interrupt the processing operation as in the prior art.
Therefore, an object of the present application is to enable cleaning without interrupting a machining operation and to accurately clean only a predetermined necessary range.

In order to solve the above-mentioned problem, the invention relating to the blow clean device according to claim 1 is directed to spraying a fluid from a flexible tube having a free end to the surface of the workpiece, thereby swinging the free end side of the flexible tube while moving the workpiece surface. In the blow-cleaning device designed to clean,
The flexible tube is curved at the middle so that the free end side is inclined with respect to the flow line direction of the fluid to be supplied,
It is supported via a support member so that the free end is located near the workpiece,
The free end side swing motion is guided in a fixed direction by a guide portion provided on the support member, and the curved portion of the flexible tube is provided in the free end side portion rather than the guide portion,
The guide part is provided with a guide hole having an elongated hole shape, and guides the swing motion of the flexible tube in a straight line.
Furthermore, a low friction material is interposed between the opening edge of the guide groove and the flexible tube.

A second aspect of the present invention is the slider according to the first aspect, wherein the low friction material is a slider attached to the periphery of the flexible tube and sliding in the guide groove .
According to a third aspect of the present invention, in the first aspect, the low friction material is an edge member provided in a molding shape along the edge of the guide groove.

  According to the first aspect of the present invention, since the free end of the flexible hose is supported via the support member so as to be positioned in the vicinity of the workpiece, when the pressurized fluid is supplied to the flexible hose and sprayed to the workpiece surface, the flexible hose is flexible. Since the hose is curved, the flexible hose bends from the curved portion and warps in the opposite direction due to the pressure of the fluid passing therethrough. After that, the flexible hose is guided by the guide portion and swings within a predetermined range by bending back in the reverse direction to its own restoring force.

  For this reason, the fluid sprayed from the flexible hose is accurately sprayed only to a predetermined range of the work, and the work surface can be cleaned accurately and efficiently. In addition, since this machining can be performed by the machining operator in parallel with the machining operation, the machining operation can be made more efficient, and the cost can be reduced because no dedicated personnel are required.

Furthermore , since the swinging motion of the flexible hose is guided by the elongated hole-shaped guide groove formed in the guide part, the swinging motion is made a linear reciprocating motion to narrow the injection range accurately and as much as possible. Can do.

  An embodiment will be described below with reference to the drawings. FIG. 1 is a schematic view of the entire apparatus. An air blow type blow clean device 2 is supported via a support member 3 in the vicinity of a work 1 placed on a work table (not shown). The support member 3 is supported by an appropriate fixing part such as a work table. The blow clean device 2 has a flexible hose 8 attached thereto via an air supply pipe 5 connected to the high pressure air hose 4 at one end and a joint 7 attached to the other end by a double nut 6 or the like.

  The flexible hose 8 is a flexible tube having a soft and appropriate elasticity such as a nylon tube. The flexible hose 8 forms an injection passage for high-pressure air injected from the air supply pipe 5 and is elastically deformed by the passage of the high-pressure air. Flexibility and elasticity to the extent that a swing motion occurs.

  An example of such a flexible hose 8 is an oil resistant nylon tube. This specific application is a fuel tube for vehicles. The material of the flexible hose 8 is not limited to nylon, and an arbitrarily flexible resin material such as polyurethane, rubber, or the like can be arbitrarily selected according to the purpose of use.

  The flexible hose 8 is arranged long in the vertical direction in the figure, the air supply pipe 5 side above the middle portion forms a straight portion 9, and the tip opening near the surface of the workpiece 1 forms a free end 10. The intermediate portion of the flexible hose 8 forms a curved portion 11, and the lower side of the intermediate portion is curved as a whole.

  The stream line L2 of the high-pressure air ejected from the free end 10 intersects with the axis L1 of the air supply pipe 5 at an inclination, and an angle θ formed therebetween is defined as an inclination angle. The inclination angle θ is appropriately set in the range of 5 ° to 150 ° according to the required ejection range. In the case of a relatively narrow ejection range as shown in the figure, for example, the angle is set to a relatively small angle of about 30 °.

  The air supply pipe 5 is connected to and supported by the support member 3 by an appropriate connection member such as a bolt 12. The lower end of the support member 3 forms a guide portion 13 that is bent in a substantially L shape, and guides the middle portion of the flexible hose 8 to convert the swing motion into motion in a certain direction.

  An elongated guide groove 14 is formed in the guide portion 13, and the flexible hose 8 is linearly moved in the guide groove 14 by swinging operation by positioning the vicinity of the curved portion 11 through the flexible hose 8. Move back and forth. A slider 15 made of a low-friction material such as self-lubricating plastic is attached around the intermediate portion of the flexible hose 8, and the flexible hose 8 is prevented from being damaged by sliding in the guide groove 14 via the slider 15.

  FIG. 2 is a view for explaining the curved shape of the flexible hose 8, and the high pressure air injected from the air supply pipe 5 into the flexible hose 8 along the axis L <b> 1 extends downward from the curved portion 11 to the axis L <b> 1. Since it inclines with respect to the angle which is (theta), it collides with the inner wall part of the flexible hose 8 in the curved part 11, and is elastically deformed so that the front-end | tip 10 side of the flexible hose 8 may bend in the reverse direction.

  For this reason, the tip 10 side is guided by the guide groove 14 and moves to the opposite end. When it reaches the end on the opposite side, further movement is restricted and it has elasticity, so it reverses in the reverse direction (initial side) again by its own restoring elasticity, and then repeats this to free end Swing 10 side.

The length D of the guide groove 14 is set according to a necessary swinging operation range of the tip 10 and is arbitrarily determined according to an injection range in which high-pressure air is blown onto the workpiece 1. The guide groove 14 is symmetric when the point O on the extension of the axis L1 is set as a neutral point. However, it may be asymmetric depending on the injection range. The shorter width of the guide groove 14 is slightly larger than the outer diameter so that the flexible hose 8 can be fitted. When a protective member such as the slider 15 (FIG. 1) is used, the width is set in consideration of the outer diameter and the like.

  In FIG. 2, an edge member 25 is used instead of the slider 15 unlike FIG. The edge member 25 is made of a low friction material, and is attached to the entire circumference along the edge of the guide groove 14 in a molding shape. The edge portion formed at the edge of the guide groove 14 is directly in the middle in the longitudinal direction of the flexible hose 8. The flexible hose 8 is protected so as not to contact the outer periphery.

  For the flexible hose 8, the total length A, the length B of the straight portion 9, the length C on the free end 10 side, the inclination angle θ, the outer diameter E and the inner diameter F of the flexible hose 8, and the injection pressure of high-pressure air are G. Sometimes, these numerical values are arbitrarily set according to the mutual relationship and the ejection condition. Accordingly, the necessary swinging degree is adjusted by appropriately adjusting the length of A and the position of the bending portion 11 in consideration of these various conditions.

Note that the swing motion increases as A increases and θ increases. Further, as E and F increase, the distance between B and C increases. Further, as G increases, the swing motion increases. One specific example of these is:
A = 90 mm, B = 35 mm, C = 40 mm, θ = 30 °, E = 6φ (mm), F = 3φ (mm), G = 4 kg. However, these are close to the minimum values, and it is arbitrary to make them larger. In this case, the flexible hose 8 is an oil resistant nylon tube.

  Next, the operation of this embodiment will be described. FIG. 3 shows an air blow state, and the flexible hose 8 performs a linear swinging motion by the guide portion 13, and its free end 10 reciprocates within a predetermined range of the work 1, for example, a plurality of grooves 1 a, 1 b, 1 c. Then, high pressure air is sprayed and sprayed into each groove to blow away unnecessary materials such as the chips 1d.

  As a result, the surface of the work 1 can be cleaned by air blow, and the air blow range can be freely set by the guide portion 13 and the intermittent spraying by the linear swing motion of the free end 10 is performed. Since the air density to be increased is increased and the injection range is made as narrow as possible by avoiding air blow to unnecessary portions, the air blow operation can be performed accurately and efficiently.

  Moreover, since the blow clean device 2 is supported by the support member 3 and the free end 10 is opened close to the left side 1 of the vehicle, this cleaning action is performed by the machining operator at the same time as the machining operation. As a result, machining operations can be made more efficient, and the cost can be reduced because no dedicated personnel are required.

The invention of the present application is not limited to the above-described embodiment, and various modifications and applications are possible. The inclination angle θ can be arbitrarily set according to the target of the air blowing work. In this way, even a three-dimensional part, an inner surface of a container-like part, an undercut part, etc. can be cleaned. In addition, the guide groove 14 is not limited to an elongated hole shape, but can be formed in an appropriate shape such as an arc shape or a wavy line shape.
Further, the fluid used in the blow clean device 2 is not limited to high-pressure air, and may be liquids such as various cleaning liquids. Also, various machining devices can be applied.

Schematic diagram of the entire device The figure for demonstrating a flexible hose and a guide part Diagram showing air blow

Explanation of symbols

  1: Work, 2: Blow clean device, 3: Support member, 4: High pressure air hose, 5: Air supply pipe, 8: Flexible hose, 10: Free end, 11: Curved part, 13: Guide part, 14: Guide groove , 15: Slider

Claims (3)

In the blow clean device that cleans the work surface while swinging the free end side of the flexible tube by spraying fluid from the flexible tube having the free end to the work surface,
The flexible tube is curved at the middle so that the free end side is inclined with respect to the flow line direction of the fluid to be supplied,
It is supported via a support member so that the free end is located near the workpiece,
The free end side swing motion is guided in a fixed direction by a guide portion provided on the support member, and the curved portion of the flexible tube is provided at the free end side portion rather than the guide portion,
The guide part is provided with a guide hole having an elongated hole shape, and guides the swing motion of the flexible tube in a straight line.
Furthermore, a blow clean device characterized in that a low friction material is interposed between the opening edge of the guide groove and the flexible tube. 2. The blow clean device according to claim 1, wherein the low friction material is a slider that is attached around a flexible tube and slides in a guide groove. The blow clean device according to claim 1, wherein the low friction material is an edge member provided in a molding shape along an edge of the guide groove.

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