JP2000227370A - Rubber burr inspection instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a rubber burr inspection instrument which can exhibit excellent inspection accuracy through a relatively simple structure and can be handled relatively easily. SOLUTION: A rubber burr inspection instrument for rubber burrs adhering to the surface of a work 51 comprises a member 12 being pressed against the surface of the work 51, means 2 for rotating any one of the work 51 or the member 12 being pressed, and means 21 for detecting frictional rotation of the other of the work 51 or the member 12 when one of them is rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber burr inspection device used for inspecting whether or not rubber burrs are attached to the surface of a work.

[0002]

2. Description of the Related Art For example, in a dynamic damper 51 shown in FIG. 4, if rubber burrs (not shown) adhere to an inner diameter portion 52a of a hub 52 which is a component of the dynamic damper 51, the mountability of the damper 51 is hindered. Conventionally, inspections for the presence or absence of rubber burrs have been performed in the manufacturing process.

That is, the dynamic damper 51 shown in FIG. 4 has an annular shape between a metallic hub 52 having an annular shape and a metallic mass 53 also having an annular shape concentrically arranged on the outer peripheral side thereof. Elastic body 5 made of rubber-like elastic material to be presented
4 and the elastic body 54 is connected to the hub 52 and the mass body 5.
3 are vulcanized and bonded to each other, and as shown in FIG. 5, are pressed into the outer periphery of the shaft 56 to suppress vibration of the rotating body 55 during use.

Therefore, if the rubber of the elastic body 54 wraps around the inner diameter portion 52a of the hub 52 and adheres as rubber burrs during the manufacture of the damper 51, the magnitude of the press-fitting load changes. Is NG. In order to avoid this, an inspection for the presence or absence of rubber burrs is performed.

However, conventionally, the inspection for the presence or absence of rubber burrs is performed by visual inspection, so that the inspection is inevitably overlooked, and quality stability is difficult (ambiguity of inspector's judgment standard) and man-hours are reduced. There is a limit to the improvement in productivity due to the size and the like.

[0006] In addition to the visual inspection, it is conceivable that an inspection for the presence or absence of rubber burrs is performed by an image processing technique. In this case, however, there are the following disadvantages.

That is, since the photographing direction of the rubber burrs by the image processor is parallel to the center axis of the damper 51, the rubber burrs attached to the inner diameter portion 52a of the hub 52 in a cylindrical shape are viewed from the end face where the thickness is visible. Although it will be photographed, the thickness of the rubber burr is extremely thin. Therefore, unless the image processing machine uses a high-performance one having a high photographing ability, or takes measures such as narrowing the image range and sequentially photographing while rotating the hub 52, the inspection accuracy will not be sufficient. . In addition, rubber is generally a black-based color, and since the black-colored rubber burr is attached to the inner diameter portion 52a of the hub 52, which is difficult to write and tends to be a shadow during photographing, the performance is also high in this respect. Unless an image processor is used, sufficient inspection accuracy cannot be obtained. High-performance image processing machines have disadvantages in that since their structure is complicated, handling requires skill and equipment costs are high.

[0008]

SUMMARY OF THE INVENTION In view of the above, the present invention provides a rubber burr inspection apparatus which can exhibit excellent inspection accuracy, has a relatively simple structure, and is relatively easy to handle. The purpose is to:

[0009]

In order to achieve the above-mentioned object, a rubber burr inspector according to claim 1 of the present invention is a rubber burr inspector for inspecting whether or not rubber burr is attached to a surface of a work, A member to be pressed pressed against the surface of the work, a rotating unit for rotating one of the work and the member to be pressed, and whether the other of the work and the member to be pressed is driven to rotate by friction with the rotation. And detecting means for detecting the

A second aspect of the present invention is a rubber burr inspection device for inspecting whether or not rubber burr is adhered to the surface of a work, wherein the metal burr inspection device is a metal pressed member. Press, the metal and rubber contact when rubber burrs are attached to the surface of the work,
The present invention is characterized in that the presence or absence of rubber burrs is inspected based on the magnitude of frictional force by utilizing the fact that metals contact each other when rubber burrs are not attached to the surface of the work.

When inspecting whether or not rubber burrs are adhered to the surface of a work using the rubber burr inspection device according to the first aspect of the present invention having the above-described structure, first, pressing means such as a spring is used. The pressed member is pressed against the work, and in this pressed state, one of the work and the pressed member, for example, the work is rotated by using a rotation driving means such as a motor. The part of the work that presses the pressed member
In the surface of the work, a portion where the probability of adhesion of rubber burrs is high. If rubber burrs are attached to this portion of the work, the friction coefficient of the rubber of the rubber burrs is relatively large, and thus a relatively large frictional force is generated. Therefore, the other of the workpiece and the pressed member, for example, the pressed member is driven to rotate.
Further, when rubber burrs are not adhered to the surface of the work, the pressed member does not rotate and is stopped because the friction coefficient of the surface of the work is relatively small and thus the generated frictional force is relatively small. . Therefore, by detecting whether or not the pressed member follows the rotation by using the detecting means, it is possible to accurately inspect whether or not the rubber burr is attached to the surface of the work.

When the present invention is applied to a dynamic damper as shown in FIG. 4, the description of claim 1 is rewritten as follows, for example.

That is, an inspection device for inspecting whether or not rubber burrs are attached to the inner diameter portion of the hub of the dynamic damper, wherein the inspection device has a tapered portion pressed against the inner diameter edge of the hub. A member to be pressed, a rotating unit for rotating one of the hub and the member to be pressed, and a detecting unit for detecting whether or not the other of the hub and the member to be pressed is driven to rotate by friction with the rotation. It has.

Further, the present invention has the above configuration.
In the tester, a metal member to be pressed is pressed against a metal work, and when rubber burrs adhere to the surface of the work, the metal (member to be pressed) and rubber (rubber burrs) come into contact with each other, and The presence or absence of rubber burrs is inspected based on the magnitude of the frictional force by utilizing the fact that the metals (the workpiece and the pressed member) come into contact with each other when the rubber burrs are not attached to the surface.

When the present invention is applied to a dynamic damper as shown in FIG. 4, the description of claim 2 is rewritten as follows, for example.

That is, an inspection device for inspecting whether or not rubber burrs are attached to the inner diameter portion of the hub of the dynamic damper, wherein the inspection device is configured to press the metal hub against the inner diameter edge of the metal hub. The taper part provided on the member is pressed, and the rubber and the metal come into contact when the rubber burr is attached to the inner diameter part of the hub, and the metals come into contact when the rubber burr is not attached to the inner diameter part of the hub. Using this, the presence or absence of rubber burrs is inspected based on the magnitude of the frictional force.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings. The rubber burr inspector according to the embodiment is an inner diameter of a hub (also called a ring) 52 of a dynamic damper 51 shown in FIG. Part (inner diameter surface) 52a
This is to check whether or not rubber burrs (not shown) are attached to the surface.

The dynamic damper 51 shown in FIG. 4 has a ring-shaped metal hub 52 and a ring-shaped metal mass (also referred to as a mass) 53 concentrically arranged on the outer peripheral side thereof as described above. An elastic body (also referred to as rubber) 54 made of a rubber-like elastic material having a ring shape is disposed between the elastic body 54 and the elastic body 54 and the hub 52 and the mass body 53 are respectively vulcanized and bonded. As shown in 5,
The shaft 5 is used to suppress the vibration of the rotating body 55 during use.
6 is press-fitted to the outer periphery. A tapered chamfered portion 52c is provided on the inner diameter portion 52a of the hub 52 at both axial sides of the cylindrical portion 52b in order to facilitate press-fitting into the shaft 56. Part of the rubber of the elastic body 54, which is vulcanized and bonded to the portion (outer diameter surface) 52d, reaches the cylindrical portion 52b via the end portion (end surface) 52e and the chamfered portion 52c of the hub 52 and adheres as a rubber burr. is there. However, the rubber burrs do not form islands, and are always formed in a state of being connected to the elastic body 54 in series.

As shown in FIG. 1, the rubber burr inspection apparatus according to the present embodiment includes a work inspection unit (inspection means) 1 in which a dynamic damper 51 as a work to be inspected is provided. A work inputting section (inputting means) 31 for supplying the workpieces one by one is provided.

The work inspecting section 1 is provided with a work rotating section (rotating means) 2 for holding a dynamic damper 51 to be inspected from now on at a fixed position and rotating the damper 51 about its central axis. As shown in FIG. 2, the pressing portion (pressing means) 11 presses the tapered pin 12 as a pressed member against the edge of the inner diameter portion 52a of the hub 52 of the damper 51 held by the work rotating portion 2. The rotating unit 2 is provided on both sides in the axial direction.

In the work rotating section 2, a driving roller 3, a required number of driven rollers 4 and a pressing roller 5 are provided on the same plane, and these rollers 3, 4, and 5 are provided with a damper 51.
, The damper 51 is held at a fixed position, and the damper 51 is rotated about its central axis. The drive roller 3 is rotationally driven by the operation of a rotary drive source such as a motor (not shown), and rotates the damper 51 at a predetermined speed. The speed will be described later. The presser roller 5 is rotatably attached to the tip of the operating rod 6a of the presser cylinder 6 via an attachment member 6b, and moves up and down with the operation of the presser cylinder 6 so that the illustrated position is at the lower end of the stroke. The damper 51 is pressed against the driving roller 3 and the driven roller 4 to be surely rotated.

First, a rail 32 having a slight inclination is provided toward the work rotating unit 2 in the work loading unit 31 for sequentially supplying the dampers 51 to the work rotating unit 2 one by one. A plurality of dampers 51 are arranged on the rail 32 so as to be able to roll freely in a line. An escape unit 33 for simultaneously moving the two operation rods 33a and 33b up and down in opposite directions is provided above the rail 32. The escape unit 33 operates together with the presser cylinder 6 as follows.

That is, when the inspection of the damper denoted by reference numeral 51A held by the work rotating portion 2 is completed, first, the presser cylinder 6 is operated to raise the presser roller 5, and the presser roller 5 is raised.
And the work input port 7 between the drive rollers 3 is opened. When the damper 51A for which inspection has been completed is removed from the work rotating unit 2 by manual work or the like, the escape snit 33 is then operated, and the operating rod 33a on the right side in the figure rises and the operating rod 33b on the left side in the figure descends, The standby first damper 51B, which has been stopped by the right operating rod 33a until now, rolls into the work rotating unit 2 from the work input port 7. The second and subsequent standby dampers 51C, 51D are stopped by the left operating rod 33b and do not move. Then
The presser cylinder 6 operates again, and the presser roller 5 descends.
The next inspection is started by pressing the damper 51B. During this inspection, the escape unit 33 is actuated again, the right operating rod 33a is lowered, and the left operating rod 33b is raised, and the second standby damper 51C is moved between the two rods 33a, 33b. Move to the position,
Similarly, the third and subsequent dampers 51D are moved up one position at a time. Therefore, a large number of dampers 51 are supplied to the work rotating unit 2 one by one in this manner.

Next, the pressing portion 11 will be described.
As described above, the pressing portions 11 are provided on both sides of the work rotating portion 2, respectively. However, only one of the pressing portions 11 will be described because of the symmetric structure.

That is, first, the pressing portion 11 is inserted into the inner periphery of the hub 52 of the damper 51 held by the work rotating portion 2 from one side in the axial direction, and a predetermined load is applied to the edge of the inner diameter portion 52a of the hub 52. A metal taper pin 12 which is a pressed member to be pressed is provided. The taper pin 12 is slidably held in an axial direction and a circumferential direction by a holder 13.
The elastic member 4 is elastically biased in a direction protruding from the holder 13.

The tip of the tapered pin 12 has a tip
A tapered pressing portion 12a is provided, and is expanded in FIG.
As shown largely, the minimum outer diameter dimension d of the pressing portion 12a
₂Is the inner diameter d of the hub 52₁If it is set smaller
The maximum outer diameter d₃Is the inner diameter d of the hub₁Greater than
It is set well. Therefore, this taper pin 12
When it is inserted into the inner periphery of the hub 52 from one side in the axial direction,
The inclination angle θ of the taper of the pressing portion 12a of the papin 12₂But c
Angle θ of the taper of the chamfered portion 52c of the ₁Less than
In the meantime, as shown, the pressing portion 12a is a chamfered portion.
(Line contact) with the step at the boundary between the cylindrical portion 52c and the cylindrical portion 52b.
You. The inclination angle θ of the taper of the pressing portion 12a₂Is chamfered
Inclination angle θ of the taper of the portion 52c₁When is the same as
Means that the pressing portion 12a contacts the chamfered portion 52c (surface contact)
And the inclination angle θ of the taper of the pressing portion 12a. ₂Is chamfered part 5
2c taper inclination angle θ₁When greater, press
The part 12a is in contact with the step at the border between the chamfered part 52c and the end face 52e.
Touch (line contact), and in any case,
Paper pin 12 is pressed against the edge of the inner diameter portion 52a of the hub 52.
Can be The pressing part 12a of the taper pin 12 is plated in advance.
Alternatively, a surface treatment is applied, so that the taper pin 12
Is designed to slide smoothly when in contact with metal
You.

At the rear end of the tapered pin 12, a flange-shaped retaining portion 12b is provided.
Engages with the inner surface of the holed lid 13 a of the holder 13 so that the taper pin 12 is prevented from falling out of the holder 13.

The holder 13 is attached to the tip of the operating rod 15a of the detection cylinder 15, and moves forward and backward with the illustrated position as the front end of the stroke by the operation of the detection cylinder 15.

The holder 13 and the taper pin 12 are provided with a rotation detector (detection means) 21 for detecting the rotation of the taper pin 12.
A pin-shaped or protruding detected portion 22 inserted and fixed in the hole-shaped mounting portion 12c of the tapered pin 12, and a photoelectric switch 23 mounted on the outer surface of the holder 13 toward the detected portion 22 are provided. I have. The detected part 22 protrudes radially from the tapered pin 12 at one point on the circumference of the tapered pin 12. When the detected part 22 passes the front of the photoelectric switch 23 in the circumferential direction with the rotation of the tapered pin 12, Is detected by the photoelectric switch 23 and the taper pin 12
Detects that is rotating. This rotation detector 21
Are provided on both sides of the work rotating unit 2.

When inspecting whether or not rubber burrs are adhered to the surface of the inner diameter portion 52a of the hub 52 of the damper 51 using the inspection device having the above configuration, first,
From the work input unit 31 to the work rotating unit 2 of the work inspection unit 1
One of the dampers 51 is supplied, and then the detection cylinder 15 of the pressing portion 11 is operated to press the tapered pin 12 against the edge of the inner diameter portion 52 a of the hub 52 by the elasticity of the spring 14. This preparation operation is performed simultaneously by the pair of pressing portions 11. Next, in this state, when the rotation driving means such as a motor is operated to rotate the driving roller 3 of the work rotating portion 2 and the damper 51, the inner diameter portion 52 of the hub 52 is rotated.
If rubber burrs are attached to a, a taper pin 12
Is pressed against the rubber burrs, the friction coefficient of the rubber of the rubber burrs is relatively large, and a relatively large frictional force is generated. Therefore, the tapered pin 12 is driven to rotate, and attached to the tapered pin 12 accordingly. The pin-shaped detected part 22 rotates. In contrast, hub 52
When rubber burrs are not attached to the inner diameter portion 52a of
Since the taper pin 12 is directly pressed against the metal hub 52, the friction coefficient of the metal hub 52 is relatively small, and thus the generated friction force is relatively small.
The taper pin 12 remains stopped without driven rotation,
The pin-shaped detected part 22 also remains stopped without rotating. Therefore, by detecting whether or not the tapered pin 12 and the detected portion 22 are rotated by the photoelectric switch 23, it is possible to accurately inspect whether or not rubber burrs are attached to the inner diameter portion 52a of the hub 52. it can.

The rotational speed of the damper 51 at the time of the inspection is, for example, 120 rpm. In this case, since the rotation is performed twice per second, the time required for the inspection is only 0.5 to 1 second.

Further, according to the inspection device having the above-described structure, the inspection for the presence or absence of rubber burrs is performed in a state where the taper pins 12 are pressed against the one damper 51 from both sides in the axial direction. Can be performed simultaneously.

Further, the position where the rubber burr is attached can be known from which tapered pin 12 is driven to rotate. That is, when both of the tapered pins 12 on both sides in the axial direction rotate, the rubber burrs wrap around from both ends 52e of the hub 52 to the inner diameter portions 52a, respectively. Since the rubber burrs are wrapping around from the end 52e of the hub 52 in the direction to the inner diameter portion 52a, the position where the rubber burrs are attached can be known by knowing which tapered pin 12 is driven to rotate.

Further, the above-mentioned inspection device has the following features.

As one of the types of the hub 52, there is a hub whose surface has been subjected to a surface treatment for both rust prevention and adhesion. According to the inspection device, the hub 52 has an edge formed on the inner edge 52a of the hub 52. Since the taper pin 12 is pressed from one side in the axial direction, the pressing force is evenly distributed over the entire circumference. Therefore, the inspection for the presence or absence of rubber burrs can be performed without damaging the surface treatment of the hub 52.

Further, since special equipment or devices such as an image processor and a torque sensor are not used, the structure is relatively simple, the handling is relatively easy, and the equipment cost is relatively low.

Further, by changing the specifications of the spring 14 disposed in the holder 13, the magnitude of the pressing force of the tapered pin 12 can be easily adjusted.

The configuration of the above-mentioned inspection device can be added or changed as follows.

The damper 51 to be inspected is rotated by a belt or a cylinder. Instead of the detection cylinder 15 and the spring 14, a device having a position detection mechanism such as a robot is used. The tapered pin 12, which is a pressed member, is advanced and retracted in the axial direction by a slide mechanism using a motor or the like. The damper 51, which is the work to be inspected, is fixed, and the tapered pin 12, which is the pressed member, is rotated, and the presence or absence of the rubber burr is inspected based on whether or not the damper 51 is driven to rotate. The presence or absence of rubber burrs is detected by the magnitude of frictional resistance. A torque detector or the like is used for measuring the frictional resistance. The material of the tapered pin 12 is not limited to metal, and the same can be realized as long as a difference in frictional force occurs on the contact surface with the work, such as a resin-coated material or glass.

[0040]

The present invention has the following effects.

That is, first, in the rubber burr inspection apparatus according to the first aspect of the present invention having the above configuration, the pressed member pressed against the surface of the work, and the rotating means for rotating one of the work and the pressed member, Detecting means for detecting whether or not the other of the workpiece and the pressed member is driven to rotate by friction with the rotation, so that when the rubber burr adheres to the surface of the workpiece, By rotating, when the rubber burrs are not attached to the surface of the work, by utilizing the fact that the other does not rotate, it can be mechanically and accurately inspected whether or not the rubber burrs are attached to the surface of the work. . In addition, because it does not use special equipment or equipment such as image processing machines,
It has features that the structure is relatively simple, the handling is relatively easy, and the equipment cost is relatively low, so that a highly practical inspection device can be provided.

Also, the present invention having the above-mentioned structure is provided in claim 2 of the present invention.
In a rubber burr inspection device, a metal pressed member is pressed against a metal work, and when the rubber burr is attached to the surface of the work, the metal comes into contact with the rubber, and the rubber burr is attached to the surface of the work. In order to inspect the presence or absence of rubber burrs according to the magnitude of frictional force by utilizing the contact between metals when there is no metal, it is also necessary to mechanically and accurately inspect whether rubber burrs are attached to the surface of the work it can. In addition, since special equipment or equipment such as an image processing machine is not used, the structure is relatively simple, the handling is relatively easy, and the equipment cost is relatively low. A high inspection device can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a rubber burr inspection device according to an embodiment of the present invention.

FIG. 2 is a schematic side view of the rubber burr inspection device with a part cut away.

FIG. 3 is a partially enlarged view of FIG. 2;

4A is a front view of a damper as a work to be inspected, and FIG. 4B is a cross-sectional view taken along line AA in FIG.

FIG. 5 is an explanatory view showing a mounted state of the damper.

[Explanation of symbols]

 1 Work Inspection Unit (Inspection Means) 2 Work Rotation Unit (Rotation Means) 3 Driving Roller 4 Follower Roller 5 Pressing Roller 6 Pressing Cylinder 6a, 15a, 33a, 33b Operating Rod 6b Mounting Member 7 Input Port 11 Pressing Unit (Pressing Means) DESCRIPTION OF SYMBOLS 12 Taper pin (member to be pressed) 12a Pressing part 12b Retaining part 12c Mounting part 13 Holder 13a Lid 14 Spring 15 Detection cylinder 21 Rotation detection part (detection means) 22 Detected part 23 Photoelectric switch 31 Work input part (input means) 32 rail 33 escape unit 51 damper (work) 52 hub 52a inner diameter part 52b cylindrical part 52c chamfered part 52d outer diameter part 52e end part 53 mass body 54 elastic body 55 rotating body 56 shaft

Claims (2)

[Claims] 1. A rubber burr inspector for inspecting whether or not rubber burrs are attached to the surface of a work (51), wherein a pressed member (12) pressed against the surface of the work (51); (51) a rotating means (2) for rotating one of the pressed member (12),
A rubber burr inspecting device, comprising: detecting means (21) for detecting whether or not the other of the work (51) and the pressed member (12) is driven to rotate by friction with the rotation. 2. A rubber burr inspection device for inspecting whether or not rubber burrs are adhered to the surface of a work (51), wherein a metal pressed member (1) is attached to a metal work (51).
2) is pressed, metal and rubber come into contact when rubber burrs adhere to the surface of the work (51), and metals come into contact when rubber burrs do not adhere to the surface of the work (51). A rubber burr inspection device characterized in that the presence or absence of a rubber burr is inspected according to the magnitude of frictional force.