JP2001198872A - Nozzle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nozzle device capable of avoiding the fouling of a nozzle, simplifying disassembling and cleaning work and performing quick and stable pick-and-place operation. SOLUTION: A nozzle chip 11 having a work attraction port 11b is detachably mounted at the end of a nozzle body 1 connected to a vacuum suction device 6 and a dust removing filter 12 is arranged between the nozzle body 1 and the nozzle chip 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle device used for a mounting machine or the like and for vacuum-sucking a work.

[0002]

2. Description of the Related Art Conventionally, a nozzle device for vacuum-sucking a work has been widely used in a mounting machine or the like. FIG. 1 shows an example of a conventional nozzle device. Reference numeral 1 denotes a nozzle which directly sucks the work W, and a suction hole 1a penetrating in the axial direction
A work suction port 1b is provided at the tip of the suction hole 1a. A suction hole 2a is also formed in the guide body 2 that slidably holds the nozzle 1, and one end of the suction hole 2a communicates with the suction hole 1a, and these holes 1a and 2a form an internal suction passage. The other end of the suction hole 2 is an external suction passage 7
Is connected to a vacuum suction device 6 such as a vacuum pump arranged in another place via the. The external suction passage 7 is provided with a filter 5 for preventing dust from flowing into the vacuum suction device 6. Reference numeral 3 denotes a case for accommodating the nozzle 1, the guide body 2 and the spring 4, and a flange portion 1c of the nozzle 1.
It has a function to prevent falling and prevent falling. The flange portion 1c of the nozzle 1 is urged downward by a spring 4 so as to be able to absorb an impact when coming into contact with the workpiece W.

In the case of a nozzle device having a structure as shown in FIG. 1, dust adhering to the work W tends to collect on a sliding portion between the nozzle 1 and the guide body 2 and the like, and the nozzle is likely to be clogged.
When the nozzle is clogged, it is necessary to perform cleaning and disassembly, and there is a disadvantage that the equipment must be stopped during that time.

Since the filter 5 is provided in the external suction passage 7 immediately before the vacuum suction device 6, the distance from the filter 5 to the tip of the nozzle 1 is long, and the suction force is generated after the suction force is generated in the vacuum suction device 6. The time required for transmission to the tip of the nozzle 1 is delayed compared to the case where the filter 5 is not provided, and there is a disadvantage that the time varies. This has been an obstacle to speeding up the pick and place operation.

[0005]

In order to solve such a problem, there is known a mounter device provided with a filter in a suction nozzle (Japanese Patent Application Laid-Open No. 63-174396).
In this case, an intake passage penetrating vertically is formed in the axial center of the suction nozzle, and a filter case having a built-in filter is fixed to the upper end of the suction nozzle. The upper end of the suction nozzle and the filter case are covered by a filter housing, and the housing is connected to the vacuum suction device through a communication path.

In the case of the suction nozzle having the above-described structure, the distance from the filter to the tip of the nozzle is relatively short. Is also small. However, since the filter is provided at the upper end of the suction nozzle covered by the filter housing, when replacing the filter, remove the filter housing from the main body and further remove the filter case from the upper end of the suction nozzle. Must be removed. For this reason, the disassembling and cleaning operations take a lot of time, and during that time, the equipment is stopped, resulting in a problem that the operation efficiency is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a nozzle device that can eliminate nozzle clogging, simplify disassembly and cleaning operations, and can perform a fast and stable pick-and-place operation.

[0008]

According to one aspect of the present invention, a suction nozzle having a work suction port and an internal suction passage connected to the work suction port is provided. And a filter arranged in the passage,
In a nozzle device in which the internal suction passage is connected to a vacuum suction device via an external suction passage, the suction nozzle includes a nozzle tip having a work suction port, and a nozzle body that detachably holds the nozzle tip. Wherein the filter is disposed between the nozzle tip and the nozzle body or inside the nozzle tip.

When the vacuum suction device is operated, the vacuum suction force acts on the work suction port of the nozzle chip via the nozzle body and the filter, and the work is suctioned to the work suction port. Even if dirt or parts dust attached to the work is sucked from the work suction port, the air containing these dirt is filtered by the filter, and the dirt does not accumulate in the path after the filter. Since the nozzle tip is detachable from the nozzle body, dust accumulated in the filter can be easily removed or replaced by removing the nozzle tip from the nozzle body.
Therefore, the time for stopping the equipment can be short, and the working efficiency is not reduced. The filter may be arranged between the nozzle tip and the nozzle body, or may be arranged inside the nozzle tip. In the former case, only the filter can be replaced, whereas in the latter case, the nozzle tip and the filter are replaced integrally, but the replacement can be performed in a shorter time.

Also, since the distance from the filter to the tip of the nozzle tip is very short, the volume of the space formed by the filter and the work suction port is very small. Can be quickly evacuated, the work suction time can be shortened, and time variations are small. Therefore, a fast and stable pick-and-place operation can be realized.

It is desirable to provide an elastic holding means for elastically holding the nozzle tip with respect to the nozzle body. In this case, the nozzle tip can be attached and detached with a single touch against the elastic holding force, and the replacement work of the filter can be further speeded up. Therefore, when disassembling / cleaning (or replacing) the filter, the time for stopping the equipment can be extremely short, and the working efficiency can be further improved. Various means such as an O-ring, a leaf spring, a rubber tube, and a holder using a spring can be considered as the elastic holding means.

It is desirable that a sealing member be interposed between the nozzle tip and the nozzle body. In this case, the degree of sealing between the nozzle tip and the nozzle body is improved, and a stable suction force can be maintained.

[0013]

2 and 3 show a first embodiment of a nozzle device according to the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals, and redundant description is omitted. The suction nozzle of the present invention includes a nozzle body 1 and a nozzle tip 11. At the lower end of the nozzle body 1, a cylindrical shaft portion 1f protrudes, and a suction hole 1a which forms a part of an internal suction passage.
Is opened downward through the inside of the shaft portion 1f. Shaft 1
An annular groove 1g into which the O-ring 10 is fitted is formed on the outer periphery of f. The nozzle tip 11 is formed in a substantially cylindrical shape, and a fitting hole 11a that fits on the outer periphery of the shaft portion 1f is provided at an upper portion, and the nozzle tip 11 is mounted coaxially with the shaft portion 1f. A work suction port 11b is provided at the lower end of the nozzle tip 11, and the fitting hole 11a and the work suction port 11b communicate with each other. An annular groove 11c is formed on the inner peripheral surface of the fitting hole 11a of the nozzle tip 11, and when the nozzle tip 11 is fitted to the shaft portion 1f of the nozzle body 1, the annular groove 11c elastically fits on the O-ring 10. By the engagement, the nozzle tip 11 is prevented from dropping, and the space between the nozzle body and the nozzle tip 11 is sealed. In other words, the O-ring 10 of this embodiment has both the function of retaining the elasticity of the nozzle tip 11 and the function of sealing.

At the bottom of the fitting hole 11a of the nozzle tip 11, a filter 12 for removing dust made of, for example, a porous resin (such as polyacetal) or felt is disposed. It is pressed by the part 1f. That is, the filter 12 is sandwiched between the nozzle tip 11 and the nozzle body 1. Nozzle tip 1
The work suction port 11b formed at the lower end of the nozzle body 1 communicates with the suction hole 1a of the nozzle body 1 via the filter 12.

The suction hole 1a of the nozzle body 1 is connected to a vacuum suction device 6 via an external suction passage 7. The external suction passage 7 is not provided with a filter. When the vacuum suction device 6 is operated, a suction force acts on the filter 12 and the nozzle tip 11 arranged at the tip of the nozzle main body 1, and the filter 12 and the nozzle tip 11 adhere to the nozzle main body 1 and are stabilized. The suction force of the vacuum suction device 6 passes through the suction hole 2 a of the guide body 2, the suction hole 1 a of the nozzle body 1 which is an internal suction passage, and the inside of the shaft portion 1 f and the filter 12.
To the workpiece W through the workpiece suction port 11b.
To adsorb. Since the filter 12 is mounted near the work suction port 11b, the volume of the space V (see FIG. 3) formed by the filter 12 and the work suction port 11b is very small. When closed, the space V can be quickly made negative pressure (vacuum), and the suction time of the work W can be shortened. In the case of the related art (see FIG. 1), since the filter 5 is provided immediately before the vacuum suction device 6, a delay of about several tens msec occurs as compared with the case where no filter is provided, and the adsorption time varies. However, in the case of the present invention (see FIG. 2), this delay was almost eliminated, and the variation in the adsorption time was also almost eliminated.

When the work W is sucked, fragments or dust of the work W may be sucked from the work suction port 11b. Even in this case, debris and dust are absorbed by the filter 12 and can be prevented from being sucked into the vacuum suction device 6. When the filter 12 is clogged, if the nozzle tip 11 is pulled out from the nozzle body 1 against the holding force of the O-ring 10, the O-ring 10 is bent and can be easily pulled out. Then, when a new filter 12 is inserted into the fitting hole 11a of the nozzle tip 11, and the nozzle tip 11 is fitted into the shaft portion 1f of the nozzle body 1, the annular groove 11c becomes O
The nozzle tip 11 can be easily attached by engaging with the ring 10. Since the filter 12 can be replaced in such a short time, the downtime of the equipment can be shortened, and a decrease in work efficiency can be minimized. The nozzle tip 11 may be replaced with a new one together with the filter 12.

FIG. 4 shows a second embodiment of the nozzle device according to the present invention. The same parts as those in FIG. In FIG. 3, the nozzle tip 11 is fitted outside the shaft portion 1f of the nozzle body 1, but in FIG. 4, the nozzle tip 11 is fitted inside the cylindrical guide 1h protruding from the lower end of the nozzle body 1. 11 is fitted. That is, an annular groove 1 i is formed on the inner peripheral surface of the guide portion 1 h, and an annular groove 11 d is formed on the outer peripheral surface 11 of the nozzle tip 11. The O-ring 10 is fitted in the annular groove 11 d of the nozzle tip 11, and the filter 12 is arranged on the upper end of the nozzle tip 11 so that the guide portion 1 h
, The O-ring 10 bends and engages with the annular groove 1i of the guide portion 1h, and the nozzle tip 11 is prevented from coming off.
In addition, the space between the nozzle body 1 and the nozzle tip 11 is sealed.

FIG. 5 shows a third embodiment of the nozzle device according to the present invention. The same parts as those in FIG. In this embodiment, a pair of spring pieces 20 are fixed to the outer surface of the lower end portion of the nozzle body 1 with screws 21, and the tip of the spring piece 20 is projected downward of the nozzle body 1. The outer peripheral surface of the nozzle tip 11 is formed in a rectangular shape, and engagement grooves 11e are formed on two opposing surfaces thereof so as to elastically engage with the distal end of the spring piece 20 and prevent the spring piece 20 from coming off. The lower end portion 20a of the spring piece 20 is inclined downward in the opening direction, and serves as a guide surface when the nozzle tip 11 is inserted. By sealing the O-ring 10 between the upper surface of the nozzle tip 11 and the nozzle body 1 as required, the degree of sealing of the nozzle device can be increased. In this case, since the outer surface of the nozzle tip 11 is elastically held by the spring force of the spring piece 20, the nozzle tip 11 can be attached and detached with a single touch, and has durability against multiple attachments and detachments. There are features.

FIG. 6 shows a fourth embodiment of the nozzle device according to the present invention. The same parts as those in FIG. In this embodiment, a pair of holders 31 are swingably mounted on the outer surface of the lower end portion of the nozzle body 1 via a shaft 30, and a torsion coil spring 3 is attached to the shaft 30.
2, the arm portion 31a of the holder 31 is constantly urged inward. In this case, the nozzle tip 11 is prevented from coming off by the arm 31a of the holder 31 holding and holding the step 11f of the nozzle tip 11. By regulating the swing angle of the holder 31, the nozzle tip 11 can be attached to and detached from the nozzle body 1 with one touch.

FIG. 7 shows a fifth embodiment of the nozzle device according to the present invention. In this embodiment, a cylindrical rubber tube 40 is fixed to the outer surface of the lower end portion of the nozzle body 1, and the cylindrical nozzle tip 11 is pressed into a portion of the rubber tube 40 projecting downward from the nozzle body 1. , Which are detachably mounted. In this embodiment, the filter 12 is provided inside the nozzle tip 11. Therefore, when replacing the filter 12, the nozzle tip 11
Will also be replaced at the same time. The rubber tube 40
May be fixed to the nozzle tip 11, and the upper end of the rubber tube 40 may be pressed into the lower end of the nozzle body 1.

FIG. 8 shows a sixth embodiment of the nozzle device according to the present invention. In this embodiment, a pair of connecting members 50 are fixed to the outer surface of the lower end portion of the nozzle body 1 by screws 51,
The lower end of the connecting member 50 is engaged with a concave groove 11g formed on the outer surface of the nozzle tip 11 to prevent the lower end thereof from coming off. Therefore, the locking claw 50a is provided at the tip of the connecting member 50.
Are formed. In this case, since the nozzle tip 11 is reliably prevented from falling off by the hook-shaped connecting member 50, it is possible to reliably prevent the nozzle tip 11 from dropping due to vibration or impact. Note that a seal member 10 such as an O-ring may be appropriately disposed between the nozzle tip 11 and the nozzle body 1 as needed.

FIG. 9 shows a seventh embodiment of the nozzle device according to the present invention. In this embodiment, a male screw 1j is formed on the outer peripheral surface of the lower end of the nozzle body 1 and the nozzle tip 1
A female screw 11h is formed at the upper end of the nozzle 1, and these screws are screwed together to make the nozzle tip 11 detachable. In this embodiment, by screwing the nozzle tip 11 to the nozzle body 1, the filter 12 can be sandwiched between the two, and the nozzle tip 11 and the filter 12 can be attached very stably. No leaks.

The structure for attaching and detaching the nozzle and the nozzle tip according to the present invention is not limited to the structure described in the above embodiment, but can be appropriately changed without departing from the spirit of the present invention. A new embodiment can be configured by appropriately combining the first to seventh embodiments. For example, the nozzle tip 11 having the filter 12 shown in FIG. 7 therein can be applied to another embodiment. Further, the nozzle device of the present invention,
As shown in FIG. 2, the nozzle is slidably inserted into the guide body, a spring is interposed between the guide body and the nozzle,
Of course, the structure is not limited to the structure in which the outside of the spring is covered by the case.

[0024]

As is apparent from the above description, according to the present invention, the suction nozzle is constituted by the nozzle tip having the work suction port and the nozzle body for detachably holding the nozzle tip, Is located between the nozzle tip and the nozzle body, or inside the nozzle tip, so that even if dust or parts debris attached to the work is sucked from the work suction port, the air containing these dusts is filtered by the filter. Therefore, it does not accumulate in the internal suction passage, the external suction passage, and the vacuum suction device. Further, since the nozzle tip is detachable from the nozzle body, dust clogged in the filter can be easily replaced and removed by removing the nozzle tip from the nozzle body. Therefore, when disassembling / cleaning (or replacing) the filter, the time for stopping the equipment can be extremely short, and the working efficiency can be improved. Furthermore, since the distance from the filter to the work suction port is short,
When the work suction port is closed by the work, the space near the work suction port can be quickly evacuated. Therefore, a fast and stable pick-and-place operation can be realized.

[Brief description of the drawings]

FIG. 1 is a sectional view of an example of a conventional nozzle device.

FIG. 2 is a sectional view of a first embodiment of the nozzle device according to the present invention.

FIG. 3 is a partially enlarged view of the nozzle device shown in FIG. 2;

FIG. 4 is a partially enlarged sectional view of a second embodiment of the nozzle device according to the present invention.

FIG. 5 is a partially enlarged sectional view of a third embodiment of the nozzle device according to the present invention.

FIG. 6 is a partially enlarged sectional view of a fourth embodiment of the nozzle device according to the present invention.

FIG. 7 is a partially enlarged sectional view of a fifth embodiment of the nozzle device according to the present invention.

FIG. 8 is a partially enlarged sectional view of a sixth embodiment of the nozzle device according to the present invention.

FIG. 9 is a partially enlarged sectional view of a seventh embodiment of the nozzle device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suction nozzle 1a Suction hole 2 Guide body 6 Vacuum suction device 7 External suction passage 10 O-ring 11 Nozzle tip 11b Work suction port 12 Filter

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Koichi Nitta 2-26-10 Tenjin, Nagaokakyo-shi, Kyoto F-term in Murata Manufacturing Co., Ltd. (reference) 3C007 DS01 FS01 FT17 FU08 GU03 3F061 AA01 CA01 CB13 CC15 DC03

Claims (3)

[Claims] A suction nozzle having a work suction port and an internal suction passage connected to the work suction port; and a filter disposed in the internal suction passage, wherein the internal suction passage is connected to an external suction passage. In the nozzle device connected to the vacuum suction device, the suction nozzle includes a nozzle tip having a work suction port, and a nozzle main body that detachably holds the nozzle tip, and the filter includes the nozzle tip and the nozzle. A nozzle device which is arranged between a main body or inside a nozzle tip. 2. The nozzle device according to claim 1, further comprising an elastic holding means for elastically holding the nozzle tip with respect to the nozzle body. 3. The nozzle device according to claim 1, wherein a seal member is interposed between the nozzle tip and the nozzle body.