JPH085338A - Measurement part protection device of optical dimension measuring instrument - Google Patents

Abstract

PURPOSE:To provide a measurement part protection device of an optical dimension measuring instrument with improved contamination-prevention effect of a measurement part and a protection member and a simple structure. CONSTITUTION:The dimension of a sectional member W carried in a transport guide 1 is measured by a light emission part 3 and a light reception part 4 such as an image sensor via a protection member 7 which is laid out detachably for a support frame 6 at a cut space S. Water which is applied for lubricating the sectional member W and a contamination substance such as a scale which left a member surface try to deposit to the protection member 7 in the cut space S but a suction air flow is generated inside the cut space S due to the suction operation by a dust collector etc., via a suction passage 8, thus unloading most of the contamination substance outside the cut space S via the suction passage 8 and a suction pipe 9 and reducing the deposition to the protection member 7 or preventing the deposition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective device for a measuring section of an optical size measuring device for measuring the size of a long member such as a wire while being conveyed.

[0002]

2. Description of the Related Art In precision rolling of a wire rod represented by a steel wire, the diameter of the wire rod may be measured by an optical size measuring device for dimensional control. As the dimension measuring device, for example, a measuring device having an optical system including a light emitting part and a light receiving part (CCD image sensor or the like) facing the light emitting part with a wire being conveyed is used.
The dimension is measured while the wire rod travels through the measuring unit (light emitting unit, light receiving unit, etc.).

By the way, the rolled wire rod is conveyed in a red hot state after rolling at a high speed of, for example, 100 m / sec, and water is sprayed for lubrication thereof. Scatter. If such a dirt substance adheres to the measurement part, problems such as damage to the optical system and a decrease in measurement accuracy due to the beam being blocked by dirt occur. It is protected by a protective member.

[0004]

However, in the above-mentioned conventional technique, when the protective member loses its light-transmitting property due to the adherence of the dirt substance, the measurement accuracy is lowered. It must be removed and is troublesome.
In order to solve this, for example, in Japanese Patent Laid-Open No. 54-94064, it has been proposed to provide a protective member with a wiper mechanism for removing contaminants. However, since the mechanism is complicated and the number of parts is large, the cost is low. There were drawbacks such as high cost and time-consuming maintenance. Further, although the adhered dirt substance is also removed by blowing it off with air or the like, there is a drawback that the dirt cannot be removed sufficiently.

SUMMARY OF THE INVENTION An object of the present invention is to provide a measuring part protecting device which has a simple structure and is excellent in the effect of preventing the measuring part and the protecting member from being soiled.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a protective device for a measuring portion of an optical dimension measuring device for measuring a dimension of an elongated member such as a steel wire or the like while conveying the elongated member in its longitudinal direction. In order to solve the above-mentioned problems, a translucent protective member disposed in the vicinity of the conveyance path of the long member and between the conveyance path and the measuring unit, and at least the protection member and the long member. And a suction means for generating a suction airflow in the space between the member and the dirt substance to collect dust with the suction airflow to the outside of the space.

The dimension measuring apparatus to which the present invention is applied includes, for example, two sets of light emitting portions and light receiving portions, one set each being arranged along each of two directions orthogonal to each other.
It is possible to exemplify the one that is configured to perform the dimension measurement while rotating around the elongated member.

The protective member is made of a light-transmissive material such as glass. Among them, heat-resistant materials such as borosilicate glass (for example, trade name: Pyrex) and quartz glass are preferably used. The protective member can be removably arranged on the support frame portion provided in the space between the protective member and the elongated member. As a specific configuration example thereof, there may be mentioned one in which the support frame portion has an insertion portion, and a plate-like protective member is inserted into and removed from the insertion portion.

Here, in the optical dimension measuring apparatus to which the present invention is applied, the long member is conveyed through the passage hole of the conveying guide provided along the conveying direction, and the measuring section and the gap between the conveying guides are provided. When the protective member is arranged, the suction means has a suction passage portion that opens to the space portion in at least one of both side conveyance guides sandwiching the gap, and the suction airflow into the space through the suction passage portion. And a suction device for generating
Here, a plurality of suction passage portions may be provided, and for example, the suction passage portions may be provided so as to surround the conveyance path of the long member. In addition, the suction direction through the suction passage portion may correspond to the conveying direction of the long member.

[0010]

In the protective device for the measuring portion of the optical dimension measuring device according to the present invention, since the suction means collects the contaminants from the space between the protective member and the elongated member, the protective member is contaminated. Adhesion of substances is suppressed. In this case, for example, a suction passage portion may be provided in a conveyance guide or the like for conveying the long member, and the vicinity of the protection member may be sucked through the suction passage portion, so that the mechanism is simple. Further, in the configuration in which the protective member is detachably arranged on the support frame portion, even if a contaminant is attached to the protective member, it is easy to remove the protective member from the support frame and remove the attached contaminant. The maintenance of the measuring unit is easy.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a long member W such as a steel wire that is hot-formed into a linear shape by a precision rolling machine (not shown) is
It is conveyed in the longitudinal direction (direction of the arrow) in the passage hole 2 formed at the center of the conveyance guide 1. Then, in the gap S of the transport guide 1, the light emitting unit 3 and the light receiving unit 4 (for example, CCD, which face each other with the long member W interposed therebetween are opposed to each other.
An optical dimension measuring device M including an optical system including a sensor and an image sensor such as a photoconductive sensor) is arranged.

As shown in FIG. 2, the optical systems such as the light emitting section 3 and the light receiving section 4 are mounted on a rotary base 5 which is rotationally driven by a rotational drive section (not shown), in each of two directions orthogonal to each other. For convenience, two sets are provided so as to face each other, and the dimensions of the long member W are measured while rotating around the long member W together with the rotary base 5.

A support frame 6 is arranged on the rotary base 5 in the vicinity of the conveying path of the long member W, and is made of heat-resistant glass such as Pyrex glass or quartz glass, or other heat-resistant translucent material. The protective member 7 is detachably inserted. The support frame 6 is formed, for example, in a U shape with a guide groove 6a cut in the inner peripheral surface as shown in FIG. 3, and the protective member 7 is provided in the guide groove 6a with the opening as the insertion portion 6b. It is inserted and removed along the line.

Next, as shown in FIG. 4, in the conveyance guide 1 downstream of the gap S in the conveying direction of the long member W, as a suction means, a suction passage 8 whose one end is open to the gap S is provided. A plurality of elongated members W are formed so as to surround them.
The other ends of the suction passages 8 open to the outer peripheral surface of the transport guide 1, and each of them is connected via a suction pipe 9 to a dust collector 10 as a suction device shown in FIG. The dust collector 10 may be a known one including, for example, a bag filter 10a to which the suction pipe 9 is connected, and an exhaust fan 10b for exhausting and sucking the inside of the bag filter 10a. The dust collector 10, the suction pipe 9, the suction passage 8, the protective member 7, and the like constitute a protective device for the measuring unit including the optical system.

The operation of the measuring unit protective device of the present invention will be described below. Long member W conveyed in the conveyance guide 1
In the gap S, an image of the long member W is projected on the light receiving unit 4 such as an image sensor by the light beam from the light emitting unit 3 through the protective member 7, and the line diameter (dimension) of the long member W is obtained from the image. Is being measured.

Here, the long member W is conveyed, for example, in a red hot state immediately after rolling at a high speed of about 100 m / sec, so that contaminants such as water used for lubrication and scale detached from the surface are contained in the gap S. Is scattered in. These dirt substances try to adhere to the protective member 7, but inside the gap S, a suction airflow is generated by the suction action of the dust collector 10 through the suction passage 8, and most of the dirt substances are sucked in the suction passage 8 and the suction passage 8. The dust is discharged to the outside of the gap S through the pipe 9 and is collected by the bag filter 10a of the dust collector 10, so that the adhesion of the dirt substance to the protective member 7 is suppressed. Here, the suction direction corresponds to the conveyance direction of the member W, that is, the scattering direction of the dirt substance from the member W, and the dirt substance is sucked efficiently.

Here, even if the suction is performed, stains and the like may gradually adhere to the protective member. In this case, the soiled protective member 7 may be removed from the support frame 6 to remove the soiled material, and then the support frame 6 may be mounted again.
Or try to replace it with a new one.

The optical system used for the dimension measuring section includes, in addition to the one including the light emitting section 3 and the light receiving section 4 facing it, for example, the light is reflected on the surface of the member and the reflected light is received by an appropriate light receiving section. Alternatively, various configurations such as a television camera (including an infrared camera) can be used.

The protective member 7 is not limited to a heat-resistant material, and ordinary glass or transparent plastic can be used, for example, when the long member W is not in a high temperature state. Further, the shape is not limited to the plate shape, and may be a shape having a curved surface. For example, as shown in FIG. 6, two semi-cylindrical protection members 27 facing each other to form a cylindrical surface.
The support frame 26 having an H-shaped cross section may be arranged at the abutting portion of and the edges of the protective members 27 may be slidably supported in the guide grooves 26a. Note that these protective members may be fixedly provided to a supporting portion such as a supporting frame.

Next, in the suction means, the suction passage 8 is provided with a tapered portion 11 around the passage hole 2 on the side facing the gap S of the downstream transport guide 1 as shown in FIG. 7, for example. You may provide so that it may open at the taper part 11. In this case, since the suction airflow is collected toward the taper portion 11, the suction and discharge effect of the dirt substance can be further enhanced. The suction passage 8 may be provided on the upstream side transport guide 1 as shown in FIG. 8 or may be provided on both the upstream side and the downstream side as shown in FIG. Further, the suction can be performed without the conveyance guide 1 as shown in FIG. In this example, the optical system such as the light emitting unit 3 and the light receiving unit 4 is statically provided with respect to the long member W together with the fixed base 25, and the suction tube 9 is passed through between the adjacent optical systems. One end of is inserted into the gap S of the conveyance guide 1 from the direction intersecting the member W,
Suction is performed through the suction pipe 9.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an example of a measuring unit protection device of an optical dimension measuring device of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a perspective view showing an example of a support frame of a protection member.

FIG. 4 is a front view of a conveyance guide provided with a suction passage.

FIG. 5 is a conceptual diagram showing a suction mechanism using a dust collector.

FIG. 6 is a front view showing a modification of the protective member and its supporting frame.

FIG. 7 is a side sectional view showing an example in which a suction passage is provided in a conveyance guide having a tapered portion.

FIG. 8 is a side sectional view showing an example in which a suction passage is provided in an upstream side transport guide.

FIG. 9 is a side sectional view showing an example in which suction passages are provided in the upstream and downstream transport guides.

FIG. 10 is a front view showing an example in which suction is performed without providing a suction passage in a conveyance guide.

[Explanation of symbols]

 M Optical Dimension Measuring Device 1 Conveyance Guide 3 Light Emitting Part 4 Light Receiving Part 5 Rotating Base 6, 26 Support Frame 7, 27 Protective Member 8 Suction Passage 10 Dust Collector (Suction Means)

Claims (5)

[Claims] 1. A measuring part protection device of an optical dimension measuring device for measuring a dimension of an elongate member while conveying the elongate member in its longitudinal direction, the device being close to a conveying path of the elongate member. And a translucent protective member arranged between the conveying path and the measuring unit, and a suction airflow is generated in at least a space between the protective member and the elongated member to remove contaminants from the space. A suction means for collecting dust together with the suction airflow, and a protection device for a measuring portion of an optical size measuring device. 2. The dimension measuring devices are orthogonal to each other.
A dimensional measurement is carried out while including two sets of a light emitting part and a light receiving part, one set for each set arranged along each of the directions, rotating around the elongated member.
Measured part protection device described. 3. The measurement unit protection device according to claim 1, wherein the protection member is formed in a plate shape, and is detachably arranged on a support frame portion provided in the space. 4. A conveyance guide having a passage hole through which the elongate member passes is provided inside along the conveyance direction of the elongate member, and the measuring section and the protection member are located between the gaps of the conveyance guide. The suction means is provided with a suction passage portion which is provided in at least one of the conveyance guides on both sides across the gap and opens into the space, and a suction device which generates the suction airflow through the suction passage portion. The measuring unit protection device according to any one of claims 1 to 3, which is a thing. 5. The measuring unit protection device according to claim 4, wherein a plurality of the suction passage portions are provided so as to surround the conveyance passage of the elongated member.