JPH0620132Y2 - Rotating cylinder device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a rotary cylinder device in a powdery granular material appearance inspection device or the like. More specifically, the present invention relates to a rotary cylinder device which is improved so that a cylinder made of a transparent member such as glass or plastic having a relatively low processing accuracy can be stably rotated with high accuracy without causing blurring.

(Prior art) Conventionally, the appearance of powders such as pharmaceuticals (fine granules, granules, powders), foods (powder raw materials, cereals), industrial materials (ceramics powder), etc. has been inspected to find defective powders and foreign substances Various appearance inspection devices for removing the have been proposed.

FIG. 5 shows Japanese Patent Application Laid-Open No. 61-21092 filed by the applicant.
It is a schematic explanatory drawing which shows the visual inspection apparatus disclosed by the 9th publication. In this appearance inspection apparatus, two transparent rotary cylinders (20) and (21) that rotate about a central axis as a rotation axis are arranged in parallel so as to face each other so as to form a granular material dropping passage (S) between them. Then, the granular material (A) is dropped from directly above the granular material falling path (S).
A defective particle removing device (22) and a non-defective product collecting container (23) are installed in this order below the powder and granular material falling passage (S). The defective particle removing device (22) removes defective products by blowing or sucking air.

The transparent rotating cylinders (20), (21) are made of glass, plastic, or the like, and as shown by arrows X ₁ and X ₂ , the granular material falling passage (S).
They are rotating in opposite directions so that the direction of rotation is downward.

A transparent light source (26) is housed in one of the transparent rotating cylinders (20) and (21), and a light source for reflection (27) is housed in the other cylinder (20). A half mirror (28) is arranged in front of the reflection light source (27).

To inspect the appearance of the granular material (A), that is, to remove defective products such as chips and cracks from the granular material (A) and foreign substances, use a transmission light source
The light from 6) is traded toward the granule falling path (S), and the light passing through the gap of the falling granules (A) is reflected by the half mirror (28).
It is reflected by and is made incident on the line sensor camera (29) arranged above. On the other hand, the light emitted from the reflection light source (27) is reflected from the falling particles (A), and the half mirror (28)
It is reflected by and is incident on the line sensor camera (29) arranged above. In this case, the amount of reflected light of the non-defective powder or granular material by the reflecting light source (27) and the amount of transmitted light of the transmitting light source (26) are set to be equal.

For this reason, when all the falling particles (A) are non-defective, the images taken by the line sensor camera (29) have the same brightness, and the particles (A) cannot be seen at all.
On the other hand, if defective particles or foreign substances are mixed in the particles (A), the amount of reflected light differs from that of a good product, that is, the brightness differs from that of a good product. Dark or bright spots will appear in the image of the camera (29). This dark spot or bright spot is detected by the image processing device (30), and if there is a dark spot or bright spot, the removing device control means
The valves (22a) of the removing device (22) are opened by (31) and (32) to remove the defective powder or foreign matter.

Then, in order to prevent the dust particles (A) from being attached to the outer peripheral surfaces of the two transparent rotating cylinders (20) and (21) described above, a cleaner is provided at a position other than the powder particle dropping passages (S). (24) and (25) are provided.

As described above, in the powder and granular material inspection device, the two transparent rotary cylinders (20) and (21) arranged in parallel facing each other are used, but the pair of transparent rotary cylinders (20) and (21) are arranged at predetermined intervals. The granules falling path (S) is formed by installing the granules (A) so that the granules (A) drop in the granule falling path.
The pair of transparent rotating cylinders (20), (21)
By properly setting the interval of, it is possible to easily form a thin granular material layer having a constant thickness in the vicinity of the inspection area, and to stabilize the inspection accuracy.

The transparent light source (26), the reflective light source (27), and the half mirror (28) are housed in these two transparent rotating cylinders (20) and (21), and are not contaminated with the powder (A). Absent.

Furthermore, the transparent rotating cylinder (20), (21), the contact surface with the granular material (A) by the continuous rotation, the cleaner (24),
It has the feature that it can be cleaned at (25) and can always be kept clean.

As described above, the transparent rotating cylinder is indispensable in the structure of the powder and granular material inspection device.

Here, as a method of rotating the cylinder, a sixth method has been conventionally used.
As shown in Figure (A), the shaft (109) is attached to one end of the cylinder (101).
To rotate the cylinder (101), or to rotate the cylinder (101) by bringing the rubber roller (110) into contact with the cylinder (101) and rotating it as shown in FIG. and so on.

(Problems to be solved by the invention) In the device shown in FIG. 6 (A), the shaft (109) has a cantilever structure, which causes a blur due to bending during rotation as shown in FIG. 6 (B). Is larger at the tip. Fig. 6
(C) shows the shaken state as seen from the shaft mounting direction.

As shown in Fig. 5, in the powder and granular material inspection device, the transmission light source (2
The light emitted from 6) and the light source for reflection (27) and reflected by the granular material (A) enters the line sensor camera (29) through the transparent rotating cylinders (20) and (21). Therefore, transparent rotating cylinders (20), (21)
When the lens shakes, these lights are refracted and bent in various directions on the glass surface, and the images of defective particles or foreign matter are disturbed or blurred, which may affect the inspection accuracy.

In addition, the rotating cylindrical part of the powder and granular material inspection device must be a transparent body that transmits light. As such a member, a member with distortion such as glass or plastic with low processing accuracy is used. Inevitably, in the rotary drive system of the device shown in FIG. 7, the distortion of the cylinder (101) is transmitted to the rotation as it is, causing blurring and unstable rotation, which has the same problem as the device of FIG. Was.

Therefore, an object of the present invention is to provide a rotary cylinder device in which a cylinder made of a member having relatively low processing accuracy can be stably driven with high accuracy without causing blurring.

(Means for Solving the Problems) This invention has the following configuration in order to achieve the above object. That is, a cylinder is arranged in the center, and a grip side flange tube and a drive side flange tube made of a material having a higher processing accuracy than the material of the cylinder are arranged so that the shaft centers between both flange tubes coincide with both ends of the cylinder. A rotary cylinder body obtained by fitting and fixing the rotary cylinder body to the mounting plate by contacting with the peripheral surface of the grip side flange pipe, and a rotary cylinder body that holds the rotary cylinder body on the drive side flange. It comprises a rotating means for rotating using a tube, the gripping means,
It is characterized in that there are three or more bearings arranged on the mounting plate so as to be circumscribed with the grip side flange tube.

Further, the rotating means includes a shaft provided on a side surface of the rotating cylindrical body on the side of the driving side flange tube so that the driving side flange tube and the shaft center of the shaft are aligned with each other, and a coupling for transmitting a rotational force to the shaft. It is more preferable if it is composed of a mechanism and a drive source that generates a rotational force.

(Operation) According to this invention, the grip side flange tube is provided at one end and the drive side flange tube is provided at the other end with respect to the cylinder, the grip means and the rotating means are separated, and the cylinder itself is not gripped. Instead, by gripping the gripping side flange pipe made of a material with higher processing accuracy than the material of the cylinder with three or more bearings arranged so as to circumscribe it, bending is less likely to occur, and the cylinder The distortion of itself is not transmitted to the rotation as it is. As a result, even if the cylinder is made of a member having relatively low processing accuracy, it is possible to obtain stable rotation with high accuracy without causing blurring.

As a result, in the powder and particle inspection device, the light transmitted through the transparent rotating cylinder is not refracted or bent in various directions on the surface of the transparent rotating cylinder, and the image of defective particles or foreign matter is disturbed. Blurring can be prevented, and inspection accuracy can be maintained and improved.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS.

The rotary cylinder device according to the embodiment is applied to a powder and granular material inspection device as shown in FIG. 5, and as shown in FIG. 1, a cylinder (1) is arranged at the center and the cylinder (1) is ) The gripping side flange pipe (2) and the driving side flange pipe (3) made of a material with higher processing accuracy than the material of (1) so that the shaft center between both flange pipes is aligned with both ends of the cylinder (1). The rotating cylinder body (4) obtained by fitting and fixing, and the rotating cylinder body (4) on the grip side flange pipe.
Gripping means for rotatably mounting to mounting plate (5) using (2)
(6) and the rotary cylinder (4) to the drive side flange tube (3)
It comprises a rotating means (7) for rotating by utilizing.

Here, the gripping means (6) is three or more bearings (8) arranged on the mounting plate (5) so as to circumscribe the gripping side flange pipe (2), and the rotating means (6) 7) is a rotating cylinder
A shaft (9) provided on the side surface on the side of the driving side flange pipe (3) of (4) so that the mutual axes of the driving side flange pipe (3) and the shaft (9), and a rotational force on the shaft (9) And a drive source (11) for generating a rotational force.

In the device of this embodiment, glass is used as the material of the cylinder (1), the grip side flange pipe (2) and the drive side flange pipe (3).
Although aluminum, which has higher processing accuracy than glass, was used as the material of this, the present invention is not limited to the combination of these materials, and the flange pipes (2), (2), which are arranged on both sides of the cylinder (1). Any combination may be used as long as the material of 3) has higher processing accuracy.

The rotary cylinder device according to this embodiment is constructed as described above.

Next, the rotary cylinder (4) will be described with reference to FIG. The gripping side flange pipe (2) consists of the gripped part (2a) and the fitting part (2b), and the drive side flange ring (3) is the shaft mounting part (3
The outer diameter of the fitting portion (2b) and the fitting portion (3b) is slightly smaller than the inner diameter of the cylinder (1). Then, the gripped side flange pipe (2) and the shaft mounting part (3a) of the drive side flange pipe (3) are fixed with a triangular block or the like, and the grip side flange pipe (2) and the drive side are fixed. With the shaft centers of the flange pipes (3) between both flange pipes aligned, both are moved and loosely fitted to both ends of the cylinder.

Then, if necessary, an adhesive or the like is poured and fixed between the fitting portions (2b), (3b) of the two flange fittings and the gap between the cylinder (1).
By doing so, even if the cylinder (1) is slightly distorted, the gripping side flange pipe (2) and the driving side funradi pipe (3) can be fitted and fixed to the cylinder (1) without difficulty.

It goes without saying that screw fixing or the like may be performed instead of fixing with an adhesive. Regarding the fitted state, contrary to the above-mentioned relationship, the flange tube may be fitted so as to enclose the cylinder (in this case, the inner diameters of both flange tubes are slightly larger than the outer diameter of the cylinder).

Next, the gripping means (6) will be described with reference to FIG.

The grip side flange tube (2) has three bearings (8a), (8b),
It is gripped by (8c). This bearing (8a), (8
b) and (8c) are positioned and fixed on the mounting plate (5) so that their outer circumferences circumscribe the gripping side flange pipe (2). There is.

By gripping the gripping side flange pipe (2) on the outer circumferences of the three bearings (8a), (8b), and (8c) in this way, almost no bending occurs in the cylinder (1). Also, the rotating cylinder
(4) can be rotated smoothly with a small force. Furthermore, since the gripping side flange pipe (2) made of a material with high processing accuracy is gripped, not the cylinder (1) itself, distortion of the cylinder (1) is not transmitted to the rotation.

In this way, the rotary cylinder (4) can rotate with high accuracy and stability.

Here, the bearings (8a), (8b), (8c) may be grasping means in which the outer circumferences are inscribed inside the grasping side flange tube (2). Also, use rubber rollers or the like instead of the bearings (8a), (8b), (8c), or
It is also possible to use those obtained by coating the outer peripheral surfaces of a), (8b), and (8c) with rubber or the like.

Next, the rotating means (7) will be described with reference to FIGS. 1 and 4. A shaft (9) is provided on the drive side flange pipe (3), and the rotational force from the drive source (11) is transmitted to the shaft (9) through a coupling mechanism (10) to form a rotating cylindrical body (4). To rotate.
Here, the shaft (9) is provided so that the axes of the shaft (9) and the drive side flange pipe (3) are aligned with each other.

As shown in FIG. 4, the coupling mechanism (10) has a hollow shaft (9) at its tip, and further has two notches on the diagonal line, and a drive shaft (12) made to engage with the notches. ).

In this way, the gripping means (6) and the rotating means (7) are separated, and the rotating cylindrical body (4) is accurately gripped by the gripping means (6). Mechanism (10)
Can be easily manufactured.

Furthermore, since the rotary cylinder device according to this embodiment is compact, it is suitable to be used by incorporating it in devices such as a visual inspection device, and the grip side flange pipe (2).
By making the hollow, the light source can be easily inserted into the cylinder (1).

Further, in this embodiment, since the rotating cylinder body (4) can be separated from the gripping means (6), cleaning can be easily performed.

(Effect of the Invention) According to this invention, the gripping side flange pipe is provided at one end and the drive side flange pipe is provided at the other end of the cylinder, the gripping means and the rotating means are separated, and the cylinder itself is gripped. Instead, a grip-side flange pipe made of a material having a higher processing accuracy than the material of the cylinder is arranged so as to circumscribe it.
Bending is less likely to occur by gripping with more than one bearing, and the distortion of the cylinder itself is not directly transmitted to rotation. As a result, even if the cylinder is made of a member having relatively low processing accuracy, it does not shake, and stable rotation with high accuracy can be obtained.

This prevents light passing through the transparent rotary cylinder from being refracted or bent in various directions on the surface of the transparent rotary cylinder in the powder and granular material inspection device, and the image of defective particles or foreign matter is disturbed. Blurring can be prevented, and inspection accuracy can be maintained and improved.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention, and FIGS. 2 (A) and 2 (B).
Is an explanatory view of the rotating cylinder that is the main part of this invention, as well as
FIG. 3 is a gripping means, FIGS. 4 (A) and 4 (B) are explanatory views of the rotating means (front view and side view of the coupling mechanism), and FIG. 5 is a schematic explanatory view of the powder and granular material inspection device. 6 (A), (B), (C) and FIG. 7 are explanatory views showing the prior art. (1) ... Cylinder, (2) ... Grip side flange tube, (3) ... Drive side flange tube, (4) ... Rotary cylinder, (5) ... Mounting plate, (6) ... Grip means, (7) ... Rotating means, (8) ... Bearing, (9) ... Shaft, (10) ... Coupling mechanism, (11) ... Drive source, (12) ... Drive shaft.

Claims (3)

[Scope of utility model registration request] 1. A cylinder (1) is arranged in the center, and a grip side flange pipe (2) and a drive side flange pipe (3) made of a material having a higher processing accuracy than the material of the cylinder (1) are provided. A rotary cylinder (4) obtained by fitting and fixing the both ends of the cylinder (1) so that the shaft centers of the flange pipes coincide with each other, and by contacting the peripheral surface of the grip side flange pipe (2), Holding means (6) for rotatably mounting the rotating cylinder (4) on the mounting plate (5), and rotating means (7) for rotating the rotating cylinder (4) using the drive side flange pipe (3). ) And a rotating cylinder device. 2. The record holding means (6) is three or more bearings (8) arranged on the mounting plate (5) so as to circumscribe the gripping side flange pipe (2). 1] The rotating cylindrical device as described above. 3. The rotating means (7) is a rotating cylinder (4).
A shaft (9) provided on the side surface of the drive side flange pipe (3) side so that the shaft cores of the drive side flange pipe (3) are aligned with each other, and a rotational force is transmitted to the shaft (9). The rotary cylinder device according to any one of claims [1] and [2], which comprises a coupling mechanism (10) and a drive source (11) for generating a rotational force.