JPH0627788U - Work suction device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a work suction device capable of sucking a work in a stable posture without increasing the suction force. A flexible skirt (3) surrounding the tip of the work suction pipe (2) at the tip of a work suction pipe (2) connected to a vacuum supply source, and a posture control member (4) for abutting against the surface of the work W to regulate the suction posture thereof. And a workpiece suction end surface 3a of the flexible skirt 3 is located on the front side of the workpiece suction pipe 2 with respect to the workpiece contact end surface 4b of the posture control body 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work suction device used when, for example, a sheet-shaped work is conveyed.

[0002]

[Prior art]

 A conventional work suction device is shown in FIG. The work suction device 40 includes a work suction pipe 41 connected to a vacuum supply source (not shown) and a flexible skirt 42 attached to the tip of the work suction pipe 41 so as to surround the pipe tip. The work W is suction-held by performing suction with a vacuum supply source while the end of the skirt 42 is in contact with the surface of the sheet-like work W.

Such a work suction device 40 is used in a work appearance inspection device 50 as shown in FIG. The work appearance inspection apparatus 50 illuminates the W side surface of the work placed in the work placement area 51 with the illumination unit 52, and takes a work W image with the VTR camera 53 placed above the work placement area 51. The picked-up image is arithmetically processed by an arithmetic processing unit (not shown) to detect whether or not the work W is missing. The appearance inspection apparatus 50 cannot carry the work W into the work placement area 51 from the sides because the illumination units 52 are provided on the four sides of the work placement area 51. It is designed to be held by the work suction device 50 and carried in from below the work placement area 51.

[0004]

[Problems to be solved by the device]

 In the work suction device 40, the work W is often held in an inclined posture, and there is a problem that the suction posture of the work W is not stable. This is because the work W is held by the balance between the suction force of the vacuum supply source, the elastic repulsive force of the skirt 42, and the weight of the work W. It could not be held in a horizontal state because it varied depending on the suction position on the work W. Due to such instability of the suction posture of the work W, when the held work W is released at the end point of the conveyance, the end of the work collides with the work placement surface at the end point of the conveyance and cracks or other defects occur. Was there.

Further, when the work suction device 40 is used in the work appearance inspection device 50 of FIG. 4, since the suction posture of the work W is unstable, the amount of illumination changes depending on the direction. There was also a problem that the inspection accuracy deteriorates.

In order to stabilize the suction posture of the work W, it is considered that the skirt 42 is omitted and the work W is directly sucked by the tip of the suction pipe 41. In this way, the work W is supported by the end surface of the suction pipe 41, so that its posture is stable. However, suction and leakage are likely to occur due to irregularities on the surface of the work W, adhered substances, and the like, and the suction force by the vacuum supply source must be increased accordingly.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a work suction device that can suck a work in a stable posture without increasing the suction force.

[0008]

[Means for solving problems]

 In order to achieve the above-mentioned object, the present invention has a flexible skirt surrounding the tip of a work suction pipe connected to a vacuum supply source, and a suction posture in contact with the work surface. The work suction device is configured by providing a posture regulating body for regulating the work suction position, and arranging the workpiece contact end surface of the scatter on the front side of the work suction pipe from the work contact end surface of the posture regulation body.

[0009]

[Action]

 According to the above configuration, when the skirt is brought into contact with the work and sucked, the skirt is deformed by the suction force, and the work is drawn toward the work suction pipe side. Since the work pulled toward the suction pipe contacts the work contacting end surface of the posture regulating body, the suction posture is along the contact surface of the posture regulating body.

[0010]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a vertical sectional view of an embodiment of the present invention.

The work suction device 1 includes a work suction pipe 2 connected to a vacuum supply source (not shown). A flexible skirt 3 surrounding the tip of the work suction pipe 2 is attached to the tip thereof. The flexible skirt 3 is made of, for example, silicone rubber, and its tip end side is expanded in a conical shape. Further, a short cylinder body 4 which is a posture regulating body is provided at the tip of the work suction pipe 2. The short tubular body 4 is made of, for example, a hard resin, and its through hole 4a is connected to the inner hole 2a of the work suction pipe 2 and is attached to the tip of the pipe 2. The lower end surface of the short tubular body 4, that is, the workpiece contact end surface 4b is horizontal. The short cylindrical body 4 thus attached is housed inside the flexible skirt 3, and the lower end surface (work contacting end surface) 3a of the flexible skirt 3 is in contact with the work piece of the short cylindrical body 4. It is located on the front side of the pipe 2 with respect to the end surface 4b. That is, the flexible skirt 3 is longer than the short tubular body 4.

A suction operation of the work W by the work suction device 1 having the above structure will be described below. When the work suction device 1 is brought close to the work W, first, the contact end surface 3a of the flexible skirt 3 comes into close contact with the work W, and the space A between the work W and the flexible skirt 3 is sealed. << See FIG. 1A >> When suction is performed in this state, the suction force acts on the surface of the work W in a leak-free state, and the work W is suctioned. When the work W is sucked, the flexible skirt 3 contracts and the work W is lifted. The lifted work W comes into contact with the work contact end surface 4b of the short tubular body 4, and the posture thereof is held along the contact end surface 4b. At this time, since the contact end surface 4b is horizontal, the suction posture of the work W held along the contact end surface 4b is also horizontal. << See FIG. 1B >> When the work suction device 1 is used in the work appearance inspection device 50 shown in FIG. 4, the work W can be stored in the work placement area 51 in a horizontally stable holding posture. . Therefore, the work W can be uniformly illuminated from the illumination units 52 arranged in each direction, and the illumination is stable and the inspection accuracy is improved.

In the above-described embodiment, the short cylinder body 4 which is the attitude regulating body is attached to the tip of the work suction pipe 2, but the present invention is not limited to this, and the short cylinder body 4 is sucked into the work suction pipe. It may be molded integrally with the pipe 2. Further, the shape of the posture regulating body is not limited to the short cylinder body 4. For example, as shown in FIG. 2, a plurality of column bodies 10 are erected at the front end of the work suction pipe 2 to form the posture regulating body. You may comprise.

[0014]

[Effect of device]

 As described above, according to the present invention, since the posture regulating body is provided, when the skirt is brought into contact with the work and sucked, the work comes into contact with the work contacting end face of the posture regulating body, so that the suction posture is stabilized. did. Therefore, since the suction posture is unstable and there are variations, the end of the work hits the landing surface when the suction is released, and cracks and other defects do not occur.

Also, during suction, the skirt prevents suction leakage. Therefore, unlike the case where the work suction pipe directly sucks the work, there is no inconvenience that the suction force needs to be increased in order to maintain a stable suction posture.

Furthermore, when this work suction device is used for a work appearance inspection device, the suction posture of the work is stabilized, so that the illumination state is good and the inspection accuracy is improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of a work suction device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the structure of another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a configuration of a conventional work suction device.

FIG. 4 is a perspective view showing a configuration of a work visual inspection apparatus.

[Explanation of symbols]

 2 Work suction pipe 3 Flexible skirt 3a Contact end surface 4 Short cylinder (posture control body) 4b Contact end surface 10 Column (posture control body)

Claims (1)

[Scope of utility model registration request] 1. A flexible skirt (3) surrounding the tip of the work suction pipe (2) connected to a vacuum supply source and a work (W) surface abutting the flexible skirt (3). A posture regulating body (4) for regulating the suction posture thereof is provided, and the work contacting end face (3a) of the flexible skirt (3) is connected to the work contacting end face of the posture regulating body (4) ( 4b) is located in front of the work suction pipe (2), the work suction device.