JP2589217Y2 - Measuring device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring device for measuring a predetermined item of an object to be measured, which is sequentially conveyed at a constant interval by a conveyor, by an optical measuring device. The present invention relates to a measurement device that irradiates an object to be measured with light and receives transmitted light or reflected light thereof while blocking disturbance light other than the irradiated light to perform measurement.

[0002]

2. Description of the Related Art A conventional measuring device includes an optical measuring device for measuring a predetermined item of an object to be measured, and a tunnel-shaped light-shielding device surrounding a transport path of a transport conveyor for sequentially transporting the object to be measured at regular intervals. In addition to being configured in combination with a cover, a light-shielding curtain for shielding light is hung at each of the exit and entrance portions before and after the light-shielding cover. The measurement is performed by the optical measuring device for a predetermined time when the object to be measured passes through the light shielding cover.

[0003]

However, in the above-mentioned prior art, only one light-shielding curtain is hung at the entrance and exit of the light-shielding cover before and after the light-shielding cover. Even if the curtain is adjusted to hang down, while the measurement is performed for a predetermined period of time (while the object to be measured is transported a predetermined distance), the light-shielding curtain is pushed up by the preceding or following object to be measured, and disturbance light is generated. There is a problem that an object to be measured cannot be accurately measured because it may enter the light shielding cover. The problem to be solved by the present invention is to provide a measuring device that can accurately measure an object to be measured sequentially conveyed at regular intervals without being affected by disturbance light other than irradiation light.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a measuring apparatus according to the present invention provides a measuring device which is transported by a transport conveyer to a predetermined position of a transport conveyer for sequentially transporting an object to be measured at regular intervals. Along with disposing an optical measuring device that measures a predetermined item of the object, a light-shielding cover that extends a predetermined length back and forth across the predetermined position and surrounds the measured object from above and from both sides is disposed, A plurality of light-shielding curtains are provided at front and rear entrances and entrances of the light-shielding cover so as to block a transport path of the transport conveyor with a length of about 1/2 of the regular interval. It is assumed that.

[0005]

According to the present invention constructed as described above, a plurality of light-shielding curtains hanging at entrances and exits before and after the light-shielding cover are pushed up by the objects to be measured which are sequentially transported at regular intervals by the transport conveyor. At this time, the light that is going to enter the light-shielding cover from the outside is the light-shielding curtain that has not been pushed up among a plurality of light-shielding curtains that are suspended in parallel at a distance of approximately の of the regular interval. So that the light does not enter the light-shielding cover.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIGS. 1, 2, and 3 are front views of the measuring device, and show light-shielding curtains that act according to the position of the measurement object that passes through the measuring position of the optical measuring device. FIG. 4 is a cross-sectional view of the transport conveyor.

In FIG. 1, reference numeral 1 denotes a transport conveyor, in which buckets 10 for placing fruits and vegetables F as objects to be measured one by one are mounted at regular intervals in a transport direction on a conveyor chain (not shown) which rotates endlessly. , And sequentially run and rotate in the direction of the arrow. The bucket 10 has a through hole 11 for measurement having a predetermined shape at the center thereof, and is formed so that measurement from below the bucket 10 is possible.

Reference numeral 2 denotes an optical measuring device, which is provided at a predetermined position of the conveyor 1 below the conveyance path of the conveyor 1. The optical measuring device 2 includes a light source device 21 composed of a halogen lamp or an incandescent lamp for irradiating the surface of the fruits and vegetables F, and a light source device 21 provided below the transport path of the transport conveyor 1 and illuminated by the light source devices 21. And a light receiving device 22 that receives light transmitted through the light emitting device. The light receiving device 22 is configured by arranging a lens 23, a spectroscope 24, and a detection device 25 along an optical axis.

The optical measuring device 2 is not limited to the transmitted light type. For example, as shown in FIG. 5, fruits and vegetables are obtained by combining a camera 26 provided above a transport path with the light source device 21. It can also be configured to measure the appearance of F.

Reference numeral 3 denotes a light-shielding cover, which extends a predetermined length back and forth across a predetermined position of the transport conveyor 1 and surrounds the transport path in a tunnel shape. Reference numeral 31a denotes an entrance of the light-shielding cover 3, and 31b denotes an exit of the light-shielding cover 3. The outlets and entrances 31a and 31b are open in a shape that allows the fruits and vegetables F conveyed by the conveyor 1 to pass therethrough.

Reference numeral 32a denotes a first light-shielding curtain that hangs down from the entrance portion 31a of the light-shielding cover 3 so as to shut off the transport path. It is a 2nd light shielding curtain hung in parallel with 1/2 pitch. 32c and 32d
Are third and fourth light-shielding curtains, which are suspended in parallel at the same position as the arrangement of the first and second light-shielding curtains 32a and 32b on opposite sides of the optical measuring device 2. .

Each of the light-shielding curtains 32a, 32b, 32c, and 32d is formed in a goodwill shape having a slit in a vertical direction, and is made of a black cloth or a thin rubber plate which is difficult to transmit light. . Furthermore, this light-shielding curtain 32a,
As b, c, and d, those having as little resistance as possible are used in order to prevent the fruits and vegetables F from moving when the fruits and vegetables F are pushed up and passed.

In the embodiment, the entrance portion 31 of the light shielding cover 3 is used.
a and two outlets 31b are suspended in parallel. However, a plurality of different buckets may be used as long as the pitch is approximately の of the mounting pitch of the bucket 10.

The operation of the above configuration will be described with reference to FIGS. FIG. 1 shows the action of pushing up the light-shielding curtain 32 by the preceding or succeeding fruit or vegetable F when the fruit or vegetable F on the conveyor 1 is transported immediately before the start of measurement. That is, the second light-shielding curtain 32b and the third light-shielding curtain 32c located inside the light-shielding cover 3 are pushed upward by the fruits and vegetables F transported by the transport conveyor 1. However, the first light-blocking curtain 32a and the fourth light-blocking curtain 32d on both outer sides are hung between the buckets 10, 10, respectively. Therefore, disturbance light does not enter the light shielding cover 3.

FIG. 2 shows that when the fruits and vegetables F on the conveyor 1 are conveyed from the start of measurement to the intermediate point of the measurement in FIG.
It shows the action of pushing up the light-shielding curtain by the preceding or following fruit or vegetable F. That is, the first and fourth outer sides
The light-shielding curtains 32a and 32d are pushed upward by the conveyed fruits and vegetables F, but the second and third
The light-shielding curtains 32b and 32c hang down between the buckets 10 and 10, respectively. In this case as well, disturbance light does not enter the light-shielding cover 3.

FIG. 3 shows the action of pushing up the light-shielding curtain 32 by the preceding or succeeding fruit or vegetable F when the fruit or vegetable F on the conveyor 1 is transported from the intermediate point in FIG. 2 to the end point of measurement. is there. In other words, in FIG. 2, the second and third light-shielding curtains 32b and 32c respectively hung between the buckets 10 and 10 remain in a state without being pushed up by the conveyed fruits and vegetables F. In addition, a part of the outer light shielding curtains 32 a and 32 d is returning to the original state, so that disturbance light does not enter the light shielding cover 3.

As described above, in any measurement state (from the start of measurement to the end of measurement) of the optical measuring device 2, the entrance 31 a and the exit 31 b of the light shielding cover 3 are shielded by any of the light shielding curtains 32. Therefore, disturbance light does not enter the light shielding cover 3.

[0018]

As described above, the measuring device of the present invention is provided with a light-shielding curtain that hangs down the front and rear of the light-shielding cover so as to cut off the transport path of the transport conveyor, respectively. A plurality of the light-shielding covers are arranged at a distance of approximately 1/2 of the regular interval for conveyance, and the entrance and exit portions before and after the light-shielding cover are suspended by a distance of approximately 1/2. Since the light is shielded by the light-shielding curtain, disturbance light does not enter the light-shielding cover at any timing when the object to be measured is measured. Therefore, the measurement by the optical measuring device can be performed accurately without being affected by disturbance light. In particular, this effect is extremely remarkable in, for example, a transmission-type measuring device that detects minute light.

[0019]

[Brief description of the drawings]

FIG. 1 is a front view of a measurement device according to the present invention, and is an explanatory diagram showing a measurement start position.

FIG. 2 is a front view of the measuring device, and is an explanatory diagram showing an intermediate position of measurement.

FIG. 3 is a front view of the measuring device, and is an explanatory diagram showing a measurement end position.

FIG. 4 is a sectional view of a conveyor.

FIG. 5 is an explanatory view showing another example of the optical measuring device.

[Explanation of symbols]

1: Conveyor 2: Optical measuring device 3: Light shielding cover 10: Bucket 11: Through hole 21: Light source device 22: Light receiving device 23: Lens 24: Spectroscope 25: Detector 26: Camera 31a: Inlet 31b: Exit 32a, b, c, d: blackout curtain

──────────────────────────────────────────────────続 き Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G01B 11/00-11/30 102 B07C 1/00-9/00 G01N 21/84-21/91

Claims (1)

(57) [Scope of request for utility model registration] An optical measuring device for measuring a predetermined item of an object to be measured conveyed by the conveyor is provided at a predetermined position of a conveyor for sequentially conveying the object to be measured at regular intervals. Disposing a light-shielding cover extending a predetermined length back and forth across the predetermined position and surrounding the object to be measured from above and from both sides,
A plurality of light-shielding curtains are provided at front and rear entrances and entrances of the light-shielding cover so as to block a transport path of the transport conveyor with a length of about 1/2 of the regular interval. Measuring device.