JPH10109727A - Conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure a smooth transfer of small articles or articles the attitude of which is hard to be stabilized. SOLUTION: A folded back plate 43 which is formed by bending a sheet metal at an acute angle along a straight line is attached to both ends of a belt supporting belt in such a way as the peripheral surface of its one piece is connected to the upper face of the belt supporting plate 41 and the bent part is in parralel to the width direction of the belt supporting plate 41, and at the end parts of the carrying-in side and carrying-out side a conveying belt 50 is folded back along the peripheral surface of the folded back plate 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for facilitating transfer of articles to a conveyor.

[0002]

2. Description of the Related Art For example, in a food production line or the like, an inspection apparatus is used which has a conveyor for inspection and checks the weight and the presence or absence of metal contamination while conveying articles on the conveyor. In this type of inspection apparatus, inspection is often hindered unless the articles are carried in and out of the inspection conveyor smoothly.

For example, in an inspection apparatus for inspecting the weight of an article, the conveyor for inspection is supported by a weighing machine. Therefore, when a strong shock is applied when the article is transferred to the conveyor for inspection, the weighing of the weighing machine is performed. Weighing is performed before the value is stabilized.

In an inspection device for inspecting metal contamination,
A magnetic field is generated in the transport path of the inspection conveyor, and changes in the magnetic field due to the articles passing through the magnetic field are detected.The detection sensitivity varies depending on the position. There is a possibility that a part where the posture or position is largely shifted and the metal of the article is highly likely to be mixed may pass through a position having low detection sensitivity and the mixed metal may not be detected.

Conventionally, in order to solve such a problem, a transfer plate is disposed in a gap between the conveyors, or the diameter of belt rollers at both ends of the conveyor is reduced to reduce the gap between the conveyors.

[0006]

However, in the method of arranging the transfer plate in the gap between the conveyors, the transfer plate itself has no conveying force, and the diameter of the belt roller is reduced only to a range that does not cause rotation unevenness or the like. Therefore, it is not possible to smoothly transfer small articles and articles whose postures are difficult to stabilize.

An object of the present invention is to provide a conveyor which solves this problem and enables a small article or an unstable article to be smoothly transferred.

[0008]

In order to achieve the above object, a conveyor according to the present invention comprises a belt receiving plate having a predetermined length,
It is formed by bending a sheet metal at an acute angle along a straight line, the outer peripheral surface of one piece sandwiching the bent portion is continuous with the upper surface of the belt receiving plate, and the bent portion is parallel to the width direction of the belt receiving plate. A folded plate attached to both ends of the belt receiving plate, an endless transport belt stretched so as to surround the belt receiving plate along its length direction, and a belt receiving plate. A plurality of rollers that are disposed below and apply tension so that the conveyor belt contacts the upper surface of the belt receiving plate and the outer peripheral surface of the folded plate, and apply a rotational force to one of the plurality of rollers to transfer the conveyor belt. And a driving device for driving the conveyance.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 9 are views showing a metal detector 10 provided with a conveyor according to one embodiment. In these figures, the metal detector 10 is constituted by a detection head 11 and a conveyor 15.

The detection head 11 is formed in a rectangular frame shape having a through hole 12 for passing an article in the center, generates a magnetic field in the through hole 12, detects a change in the magnetic field, and finds an article containing metal. . On the other hand, the conveyor 15 includes a base 16, a driving unit 17 supported by the base 16, and a driving unit 1.
And a transport unit 40 supported on the upper part of the reference numeral 7.

The frame 18 of the drive unit 17 has a front plate 19 and a rear plate 19, which are formed in a substantially U-shape in which a central upper portion is largely cut into a rectangular shape in order to dispose the detection head 11, and are provided so as to face front and rear. It is formed by a plate 20, a bottom plate 21 that connects between lower portions of the front plate 19 and the rear plate 20 and is supported by the base 16, and side plates 22 and 23 that connect between both sides of the front plate 19 and the rear plate 20. I have.

A first tension roller 25 is disposed above one end (loading side) of the frame 18. Both ends of the shaft 25a of the first tension roller 25 are
And a rear plate 20, and a roller body 25b is provided at a predetermined interval in an intermediate portion thereof. Also, frame 1
A second tension roller 26 is disposed above the other end (export side) of 8. Second tension roller 26
Both ends of the shaft 26a are supported by a front plate 19 and a rear plate 20, and a roller body 26b is provided at a predetermined interval at an intermediate portion. A gear 27 is provided at an end of the shaft 26a of the second tension roller 26 on the front plate 19 side.

Further, a pinch roller 28 is arranged further on the discharge end side than the second tension roller 26. Both ends of a shaft 28a of the pinch roller 28 are supported by a front plate 19 and a rear plate 20, and a gear 29 is provided at an end of the shaft 28a on the front plate 19 side.

A motor 31 is supported below the pinch roller 28 by a motor support plate 30. A drive gear 32 is attached to the motor 31. An endless drive chain 33 extends between the drive gear 32 and the gear 29 of the pinch roller 28 and the gear 27 of the second tension roller 26.

An L-shaped head support plate 34 for fixing and supporting the detection head 11 is attached to the lower edge of the cutout of the front plate 19 and the rear plate 20 of the frame 18.

The front plate 19 and the rear plate 20 of the frame 18
A plurality of support portions 35 for supporting a belt receiving plate 41 to be described later from below are provided at the upper edge of the inner surface of the front plate 19 and the upper edge of the outer surface of the front plate 19 and the rear plate 20 for fixing the belt receiving plate 41. Are attached.

A transport portion 40 supported on the upper portion of the frame 18 has a substantially rectangular synthetic resin belt receiving plate 41 having a width substantially equal to the distance between the front plate 19 and the rear plate 20 of the frame 18 and having a predetermined length. Is provided. Belt receiving plate 41
Is supported from below by a support portion 35 of the frame 18, and a hook 36 provided on a front edge and a rear edge thereof is engaged with a locking member 36 of the frame 18, and is attached to the upper portion of the frame 18 in a substantially horizontal state. Have been.

At both ends of the belt receiving plate 41, step portions 41b formed one step lower than the height of the upper surface 41a,
41c are provided continuously in the width direction.
Folding plate 43 is screwed to b and 41c.

As shown in FIG. 9, the folded plate 43 is formed by bending a strip-shaped sheet metal having a length substantially equal to the width of the belt receiving plate 41 at a straight line along the length direction thereof at an acute angle. A strip-shaped first piece 43a and a second piece 43b are connected via a bent portion 43a. First piece 43
The plurality of screw holes 44 are provided on the second piece 43b so as to coincide with each other.

The folded plate 43 is screwed with the first piece 43a in contact with the steps 41b and 41c of the belt receiving plate 41 and the second piece 43b in contact with the lower surface 41d of the belt receiving plate 41. ing. Since the thickness of the folded plate 43 is set to be equal to the step between the steps 41 b and 41 c of the belt receiving plate 41, the upper surface of the first piece 43 a is substantially equal to the height of the upper surface 41 a of the belt receiving plate 41. .

A driven roller 45 is disposed on the lower surface of one end side (loading end side) of the belt receiving plate 41. Both ends of the shaft 45a of the driven roller 45 are supported by bearing plates 46, 46 fixed to the belt receiving plate 41, and a roller body 45b is provided at a predetermined interval in an intermediate portion of the shaft 45a.

A drive roller 47 is arranged on the lower surface of the other end side (exit end side) of the belt receiving plate 41. Both ends of a shaft 47 a of the driving roller 47 are supported by bearing plates 48, 48 fixed to the belt receiving plate 41.
A large-diameter roller body 47b is provided at an intermediate portion of 7a, and a gear 49 is attached to an end of the shaft 47a on the front plate 19 side.

An endless transport belt 50 is stretched around the belt receiving plate 41 so as to surround the belt receiving plate 41, the roller body 45b of the driven roller 45, and the roller body 47b of the drive roller 47.

When the belt receiving plate 41 is removed from the frame 18, the transport belt 50 is in a loosened state as shown in FIG.
When it is attached to the first and second tension rollers 25 and 26 of the drive unit 40, the roller units 25b and 26b push up the inner surface 50a side of the upper surface of the belt receiving plate 41 and the folded plate 43. It is stretched with an appropriate tension to contact the outer circumference.

The drive chain 33 of the drive section 40 is
When the belt receiving plate 41 is not mounted on the frame 18, the belt receiving plate 41 is loosened as shown in FIG. 7. When the belt receiving plate 41 is mounted, the belt receiving plate 41 is pushed down by the gear 49 of the driving roller 47 of the transport unit 17, and And the rotational force of the motor 31 is
To communicate.

In the metal detector 10 configured as described above, at the carry-in end and the carry-out end, as shown in FIG.
Is sharply folded along the outer circumference of the article W. Therefore, even if the diameter of the roller 1a of the front-stage conveyor (or the rear-stage conveyor) 1 is large, the gap between the roller 1a and the roller 1a can be significantly shortened. Can be smoothly received on the conveyor belt 50 of the conveyor 15 and can be smoothly carried out from the conveyor belt 50 even if the shape of the sheet is small or the posture is not stable. Therefore, the metal mixed in the article can be detected stably.

[0027]

[Other Embodiments] In the above embodiment, the conveyor of the present invention is applied to a conveyor of a metal detector. However, the conveyor of the present invention can be similarly applied to a conveyor of a weight detector. In this case, the detection head 11 and the base 16 of the above embodiment may be omitted, and the driving unit 17 may be supported by a measuring instrument. Further, the conveyor of the present invention may be applied not only to the above-described inspection machine, but also to a conveyor used on the upstream side or downstream side of the inspection machine.

In the above-described embodiment, the transporting section 40 is detachable from the driving section 16. However, when it is not necessary to pass an article through the hole of the detecting head unlike a weight detector, the transporting section 40 may be used. The detachable structure as in the embodiment may not be adopted.

In the above embodiment, the driving roller 47
Is a chain drive, but a belt drive may be used, or a direct drive type drive device in which a motor and a drive roller are integrated may be used.

In the above embodiment, the belt receiving plate 4
Although the first piece 43a and the second piece 43b of the folded plate 43 are screwed to both ends of the plate 1, the method of attaching the folded plate is not limited to the above embodiment. For example, in addition to the first piece and the second piece, another attachment piece may be extended laterally or downward, and this attachment piece may be fixed to the belt receiving plate 41.

[0031]

As described above, the conveyor according to the present invention comprises a folded plate obtained by bending a sheet metal at an acute angle along a straight line, the outer peripheral surface of one of which is continuous with the upper surface of the belt receiving plate, and Attach to both ends of the belt receiving plate so that the bent portion is parallel to the width direction of the belt receiving plate, and fold the transport belt along the outer peripheral surface of this folding plate at the loading and unloading ends. Therefore, the gap between the front and rear conveyors can be made much smaller, and even small articles and articles with difficult to stabilize posture can be transferred smoothly. Inspection accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a metal detector using a conveyor according to an embodiment of the present invention.

FIG. 2 is a front view of a driving unit of the conveyor according to the embodiment;

FIG. 3 is a side view of a driving unit of the conveyor according to the embodiment.

FIG. 4 is a side view of a driving unit of the conveyor according to the embodiment.

FIG. 5 is a side view of a conveyor of the conveyor according to the embodiment;

FIG. 6 is a plan view of a conveyor of the conveyor according to the embodiment.

FIG. 7 is a side view of a conveyor of the conveyor according to the embodiment;

FIG. 8 is a side view of a conveyor of the conveyor according to the embodiment.

FIG. 9 is a perspective view of a main part of a conveyor of the conveyor according to the embodiment.

FIG. 10 is an enlarged side view of a main part of the conveyor according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Metal detector 11 Detection head 15 Conveyor 17 Driving part 18 Frame 25 First tension roller 26 Second tension roller 28 Pinch roller 31 Motor 41 Belt receiving plate 43 Folding plate 45 Follower roller 47 Drive roller 50 Transport belt

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[Procedure amendment]

[Submission date] December 24, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG. 2

[Fig. 7]

[Fig. 1]

[Fig. 3]

[Fig. 4]

[Fig. 5]

FIG. 10

[Fig. 6]

[Fig. 8]

[Fig. 9]

Claims (1)

[Claims] 1. A belt receiving plate having a predetermined length, formed by bending a sheet metal at an acute angle along a straight line, an outer peripheral surface of one of the pieces sandwiching the bent portion is continuous with the upper surface of the belt receiving plate, and A folding plate attached to both ends of the belt receiving plate so that the bent portion is parallel to the width direction of the belt receiving plate; and a wrapping around the belt receiving plate along the length direction thereof. An endless transport belt, a plurality of rollers disposed below the belt receiving plate, and applying a tension so that the transport belt contacts an upper surface of the belt receiving plate and an outer peripheral surface of the folded plate; A driving device that applies a rotational force to one of the rollers to transport and drive the transport belt.