JP7269399B1 - test chain - Google Patents

Abstract

A conveyor belt is prevented from being damaged by avoiding contact of a connecting member of a test chain placed on the bottom with the conveyor belt when adjusting a conveyor scale in which the bottom of the conveyor belt is curved. A test chain (7) includes a plurality of main rollers (71) arranged along the conveying direction of a conveyor scale (1), and a test chain (7) arranged on both sides in the width direction of the main rollers (71). a side member 72 that connects the shafts 8 respectively; a connecting member 73 that connects the side member 72 to the first rotating shaft 8 from the outside in the width direction; and an auxiliary member 74 that assists the movement of the roller 71 in the conveying direction. [Selection drawing] Fig. 5

Description

Application of Article 30, Paragraph 2 of the Patent Act JFE Advantech Co., Ltd. released test chain drawings to Furukawa Industrial Machinery Systems Co., Ltd. on September 1, 2021

The present invention relates to test chains.

A test chain is commonly used to calibrate a conveyor scale that measures the weight of items being conveyed on a conveyor belt. In Patent Document 1, a plurality of main rollers arranged along the conveying direction of a conveyor belt, side plates supporting the rotation shafts of the adjacent main rollers, and side plates corresponding to the rotation shafts of the main rollers are disclosed. and a connecting member that rotatably connects from the outside in the width direction orthogonal to the conveying direction.

Patent No. 6385542

In the test chain described in Patent Document 1, when calibrating a bag-shaped conveyor scale in which the bottom of the conveyor belt is curved in the width direction when viewed from the conveying direction, for example, a connecting member protruding to the outside in the width direction of the main roller contact the conveyor belt and damage the conveyor belt.

SUMMARY OF THE INVENTION An object of the present invention is to prevent damage to the conveyor belt by avoiding contact of connecting members of a test chain with the conveyor belt when calibrating a conveyor scale having a curved bottom portion of the conveyor belt.

The present invention comprises a plurality of main rollers arranged along the conveying direction of a conveyor scale, and side members disposed on both sides in the width direction of the main rollers and supporting first rotation shafts of the adjacent main rollers. a connecting member that connects the side member to the first rotating shaft from the outside in the width direction; and a connecting member attached to the outside in the width direction of the side member to assist movement of the plurality of main rollers in the conveying direction. A test chain with an auxiliary member for

According to the present invention, when calibrating a conveyor scale in which the bottom portion of the conveyor belt is curved, by bringing the auxiliary member of the test chain placed on the conveyor belt into contact with the conveyor belt, the connecting member to the conveyor belt contact can be avoided. More specifically, the auxiliary member of the test chain is brought into contact with the side portion of the conveyor belt rising upward from the bottom portion of the conveyor belt to avoid contact of the connecting member with the side portion of the conveyor belt, thereby preventing damage to the conveyor belt. can be prevented. Since the auxiliary member rotates around the second rotating shaft extending in the vertical direction, even if the auxiliary member is in contact with the side portion of the conveyor belt, it does not hinder the movement of the conveyor belt in the conveying direction.

The main roller may have an outer diameter equal to or greater than the width.

According to this configuration, the width of the main roller is relatively narrower than that of the main roller, which generally has a laterally elongated cross section along the axial direction (the outer diameter is less than 1 time the width). It is easy to arrange the auxiliary member and the main roller between the side portions of the belt. Specifically, when the outer diameter is less than 1 time the width, the width of the main roller is relatively expanded, so that only the width direction both ends of the main roller come into contact with the conveyor belt, causing the main roller to overturn. is likely to occur.

It is preferable that the widthwise outer end of the auxiliary member is located outside the widthwise outer end of the connecting member.

According to this configuration, the auxiliary member comes into contact with the side portion of the conveyor belt before the connecting member, so contact of the connecting member with the conveyor belt can be more reliably avoided.

The auxiliary member may be a side roller having a second rotating shaft extending in a direction intersecting the first rotating shaft.

According to this configuration, the side rollers can be rotated while being in contact with the side portions of the conveyor belt, so that the movement of the conveyor belt to the conveying direction is not hindered.

The auxiliary member and the main roller may be offset in position in the conveying direction.

According to this configuration, interference between the auxiliary member and the connecting member can be avoided. As compared with the case where the rotating shaft of the auxiliary member and the rotating shaft of the main roller are aligned with each other in the conveying direction, the auxiliary member can be easily assembled.

The auxiliary member may be arranged between the first rotation shafts of the adjacent main rollers in the side member.

According to this configuration, compared to the case where the dimension from the first rotation shaft to the end of the side member is extended in order to arrange the auxiliary member outside the space between the first rotation shafts of the adjacent main rollers, The amount of overlap in the conveying direction between the side members provided between the first rotating shafts of the main rollers can be reduced. This suppresses interference between the side members that may occur when the test chain is bent in the conveying direction of the conveyor belt, and makes it easier to bend the test chain in the conveying direction of the conveyor belt. As a result, for example, even when the conveyor belt is bent with respect to the conveying direction, the test chain can easily be made to follow the conveyor belt.

The auxiliary member may be vertically offset with respect to the first rotating shaft.

According to this configuration, by locating the auxiliary member below the first rotation axis, the height of the conveyor belt rising from the bottom of the conveyor belt is reduced compared to the case where the vertical position of the auxiliary member coincides with the first rotation axis. The width between the side portions can be increased, and even when the bottom portion of the conveyor belt spreads in the width direction like a semicircle, the test chain can follow the shape of the belt. is easy to separate.

In addition, by positioning the auxiliary member above the first rotation axis, compared to the case where the vertical position of the auxiliary member coincides with the first rotation axis, for example, in a bag-shaped conveyor or the like, the conveyor belt moves in the width direction. In the case of a rubber material that does not spread easily, the load applied to the pair of auxiliary members sandwiched between the conveyor belts can be reduced.

The auxiliary member may have a first auxiliary member on one side in the width direction and a second auxiliary member on the other side, and the second auxiliary member may be arranged below the first auxiliary member. .

According to this configuration, for example, even when the shape of the conveyor belt at the location where the test chain is installed is left-right asymmetrical, or when the tension on one side of the conveyor belt increases, overturning of the main roller can be suppressed. More specifically, when the tension on one of the side portions of the conveyor belt increases, the bottom portion of the conveyor belt moves toward one side. As a result, the main roller tends to overturn to the other side as a whole. On the other hand, by setting the vertical position of the auxiliary member on the other side lower than the vertical position of the auxiliary member on the one side, compared to the case where the vertical position is set high, when falling over to the other side In addition, the side rollers are easily brought into contact with the side portions of the conveyor belt, and overturning of the main rollers can be suppressed.

A widthwise outer end of the first auxiliary member may be located outside a widthwise outer end of the second auxiliary member.

According to this configuration, by laterally offsetting the installation position of the auxiliary member in the width direction, the test chain can easily follow the conveyor belt even when the shape of the conveyor belt at the test chain installation location is left-right asymmetric. Further, in the case where the first auxiliary member is arranged above the second auxiliary member, by positioning the first auxiliary member on the outer side in the width direction of the second auxiliary member, the side portion that expands upward of the conveyor belt Easy to place the test chain along.

According to the test chain of the present invention, when calibrating a conveyor scale having a curved bottom portion of the conveyor belt, it is possible to avoid contact of the connecting member with the conveyor belt and prevent damage to the conveyor belt.

FIG. 2 is a front view of a state in which the test chain according to the embodiment of the present invention is used on a conveyor scale; FIG. 2 is a side view of the test chain of FIG. 1; FIG. 3 is an enlarged view of part III of FIG. 2; The top view of the IV part of FIG. FIG. 5 is a cross-sectional view taken along line VV of FIG. 4; FIG. 2 is an enlarged front view of the test chain and conveyor belt in FIG. 1; FIG. 4 is a plan view for explaining the action of the side plate; FIG. 4 is an enlarged front view of test chains according to first and second modifications of the present invention; FIG. 11 is an enlarged front view of a test chain according to a third modified example of the present invention; FIG. 11 is an enlarged front view of a test chain according to a fourth modification of the invention; FIG. 11 is an enlarged cross-sectional view of a test chain according to fifth and sixth modifications of the present invention; FIG. 11 is an enlarged cross-sectional view of test chains according to seventh and eighth modifications of the present invention; FIG. 21 is a plan view of a test chain according to a ninth modification of the present invention; FIG. 20 is an enlarged front view of a test chain according to a tenth modification of the present invention;

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the following description is essentially merely an example, and is not intended to limit the present invention, its applications, or its uses.

FIG. 1 shows test chain 7 in use on conveyor scale 1 . The conveyor scale 1 using the test chain 7 is configured to be able to measure the transport amount while transporting the transported object.

Referring to FIG. 1, a conveyor scale 1 includes an endless conveyor belt 2 for conveying an object, a conveying guide mechanism 3 for conveying the conveyor belt 2, a support shaft 4 for supporting the conveying guide mechanism 3, and a conveyor belt. 2, and a drive unit for driving the conveyor belt 2, such as a drive motor (not shown). A plurality of transport guide mechanisms 3 and support shafts 4 are arranged on the transport path of the conveyor scale 1 as required, but only one set of transport guide mechanism 3 and support shaft 4 is shown in FIG. It is

The conveyor belt 2 is folded in two in the width direction orthogonal to the conveying direction and has a U-shaped cross section when viewed from the front. The conveyor belt 2 is movably supported in the conveying direction by conveying guide mechanisms 3 attached to support shafts 4 arranged on both sides in the width direction of the conveyer belt 2 when viewed from the front.

The conveyor belt 2 includes a bottom portion 22 that protrudes downward toward the center in the width direction, a pair of left and right side portions 23 that rise upward from both sides in the width direction of the bottom portion 22, and a conveying guide that extends further upward from the side portions 23. and an upper edge 21 supported by the mechanism 3 .

As shown in FIG. 1, the test chain 7 is placed on the bottom 22 of the conveyor belt 2 and used to calibrate the weights weighed by the conveyor scale 1 . The calibration work using the test chain 7 is carried out by placing the test chain 7 at a fixed position on the conveyor belt 2 in an immovable state, driving the conveyor scale 1 in this placed state for a predetermined period of time, and measuring the test chain 7 at that time. Weigh the Then, the accuracy of the conveyor scale 1 is inspected by comparing the measured value with the known weight value of the test chain 7 .

Referring to FIG. 2, the test chain 7 in this embodiment is made of metal. The test chain 7 is not limited to being made of metal, and may be made of resin. The test chain 7 has a plurality of main rollers 71 , a plurality of side plates 72 as side members, a plurality of connecting members 73 , and a plurality of side rollers 74 . The test chain 7 is formed to have a predetermined length by connecting a plurality of side plates 72 in the conveying direction. The test chain 7 is configured to have a weight equal to or less than the weight set according to the carrying capacity of the conveyor scale 1 .

3 and 4, a plurality of main rollers 71 are arranged at predetermined intervals along the conveying direction of the conveyor scale 1. As shown in FIG. A rotation shaft (first rotation shaft) 8 of each main roller 71 extends in the width direction orthogonal to the conveying direction. In this embodiment, the separation distance L1 between the rotation axes O1 of the adjacent main rollers 71 is set to 100 mm or more and 250 mm or less.

As shown in FIG. 5, the outer diameter D1 of each main roller 71 is one or more times the width W1. In other words, each main roller 71 has a square or vertically elongated cross-sectional shape along the axial direction (when viewed from the front). The relationship of the outer diameter D1 to the width W1 of the main roller 71 is not limited to this. good. Also, the outer diameter D1 is preferably set to be two to five times the width W1. Furthermore, the outer diameter D1 is more preferably set to 2.5 to 3 times the width W1. Since the main roller 71 of this embodiment has an outer diameter D1 of 170 mm and a width W1 of 60 mm, the outer diameter D1 is 2.8 times the width W1. Each main roller 71 is rotatably supported by the first rotating shaft 8 via a bearing 81 .

3 and 4, a pair of side plates 72 are rotatably attached to both ends of the rotating shaft 8 in the width direction, the side plates 72 connecting adjacent main rollers 71 to each other. The pair of side plates 72 are arranged on both sides in the width direction of the main roller 71 and support the first rotating shafts 8 of the main rollers 71 adjacent in the conveying direction.

Referring to FIG. 3, in this embodiment, the side plate 72 is formed of a metal plate member that has a predetermined vertical width and extends in the transport direction. The side plate 72 may be made of resin instead of metal. In this embodiment, the side member is formed of the side plate 72 made of a plate-like plate material, but the side member is not limited to this, and may be an elongated rod-like member. The side plate 72 has an inner side plate 72a positioned on the inner side in the width direction and an outer side plate 72b positioned on the outer side of the inner side plate 72a. The inner side plate 72a connects a predetermined reference main roller 71a and a front main roller 72b arranged in front of the reference main roller 71a in the conveying direction, and the outer side plate 72b connects the reference main roller 71a and the reference main roller 71a. It is connected to the rear main roller 71c arranged rearward in the conveying direction.

More specifically, through-holes penetrating in the width direction are provided at both end portions in the transport direction of the inner side plate 72a and the outer side plate 72b at the center portion in the vertical direction. The first rotating shaft 8 of the front main roller 71b is inserted through a through hole at one end of the inner side plate 72a in the conveying direction, and the first rotating shaft 8 of the reference main roller 71a is inserted through a through hole at the other end. . The first rotating shaft 8 of the reference main roller 71a is inserted through a through hole at one end in the transport direction of the outer side plate 72b, and the first rotating shaft 8 of the rear main roller 71c is inserted through a through hole at the other end. ing.

As shown in FIGS. 4 and 5, the inner side plate 72a and the outer side plate 72b are inserted through the first rotating shaft 8 of each main roller 71 in this order, and the first rotating shaft 8 is threaded. The inner and outer side plates 72a and 72b are rotatably connected to the first rotating shaft 8 by screwing the nuts 8b onto the peaks 8a. The thread 8a and the nut 8b constitute a connecting member 73. As shown in FIG. The connecting member 73 protrudes outward in the width direction from the outer surface of the outer side plate 72b. The connecting member 73 is not limited to this. A configuration in which the retainer pin is inserted through the through hole may also be used.

3 and 4, side rollers 74 as auxiliary members are attached via brackets 75 to the widthwise outer surfaces of the inner side plate 72a and the outer side plate 72b. The side rollers 74 have a first side roller 74a on one side in the width direction and a second side roller 74b on the other side in the width direction. The first and second side rollers 74 are arranged such that the second rotating shaft 9 extends vertically. In other words, the rotation axis O2 of the first and second side rollers 74 extends vertically so as to intersect the rotation axis O1 of the first rotation shaft 8 extending in the width direction.

The side rollers 74 are preferably arranged such that the side rollers 74 and the main rollers 71 are offset from each other in the conveying direction. More specifically, in this embodiment, the side rollers 74 are arranged at the center of each side plate 72 in the transport direction. Therefore, the rotation axis O2 of the side roller 74 is positioned at the center between the rotation axes O1 of the main rollers 71 in the transport direction.

As shown in FIG. 5 , the side rollers 74 are arranged in the center of each side plate 72 in the vertical direction. Therefore, the vertical position of the side roller 74 substantially coincides with the vertical position of the first rotating shaft 8 of the main roller 71 . In this embodiment, the center of the side roller 74 in the direction of thickness W2 coincides with the vertical position of the rotation axis O1 of the main roller 71 .

As shown in FIG. 5, the first side roller 74a and the second side roller 74b are arranged substantially symmetrically on both sides in the width direction, although not limited to this. The protrusion amount T1 of the first side roller 74a from the side plate 72 and the protrusion amount T1 of the second side roller 74b from the side plate 72 match. The protrusion amount T1 is larger than the protrusion amount T2 of the fastening member 73 from the side plate 72 . In other words, the side rollers 74 are located outside the fastening member 73 in the width direction.

The outer diameter D2 of each side roller 72 is preferably equal to or less than the separation distance L1 between the rotation axes O1 of the main rollers 71 . More preferably, the outer diameter D2 of the side rollers 72 is less than or equal to the diameter D1 of the main rollers 71 . The side roller 74 of this embodiment has an outer diameter D2 of 40 mm and a width W2 of 17 mm. The outer diameter D<b>2 of the side roller 74 is not limited to this, and the widthwise outer end of the side roller 74 may be positioned outside the widthwise outer end of the connecting member 73 . For example, the outer diameter D2 of the side roller 74 may be 30 mm or more and 70 mm or less. Each side roller 74 is rotatably supported by the second rotating shaft 9 fixed to the bracket 75 . The cross-sectional shape of the side roller 74 may be vertically long, square, horizontally long, or spherical.

The bracket 75 is formed in a U shape that opens outward when viewed from the front. The bracket 75 includes a base portion 75a fixed to the side plate 72, an upper surface portion 75b extending outward from the upper end of the base portion 75a, and a lower surface portion 75c extending outward from the lower end of the base portion 75a and facing the upper surface portion 75b. have

As shown in FIG. 4, the upper surface portion 75b and the lower surface portion 75c are triangular in plan view. The dimensions of the upper surface portion 75b and the lower surface portion 75c in the conveying direction decrease from the inner side in the width direction toward the outer side in the width direction. The second rotating shaft 9 of the side roller 74 is interposed at the widthwise outer end portions of the upper surface portion 75b and the lower surface portion 75c.

As shown in FIG. 4, in this embodiment, the amount of protrusion T1 of each side roller 74 from each side plate 72 is set constant, so that the side rollers 74 attached to the inner side plate 72a and the outer side plate 72a The side rollers 74 attached to the plate 72b are located outside in the width direction by the thickness of the outer side plate 72b. When attaching the side rollers 74 to the inner side plate 72a, for example, a plate having the thickness of the outer side plate 72b is attached, and the outer side rollers 74 attached to the inner side plate 72a and the outer side plate 72b are attached. You can match the position.

According to the test chain 7 according to the above embodiment, the following effects are obtained.

As shown in FIG. 6, when calibrating the conveyor scale 1 in which the bottom portion 22 of the conveyor belt 2 is curved, by bringing the side rollers 74 of the test chain 7 placed on the conveyor belt 2 into contact with the conveyor belt 2, , contact of the connecting member 73 with the conveyor belt 2 can be avoided. More specifically, the side rollers 74 are brought into contact with the side portions 23 of the conveyor belt 2 rising upward from the bottom portion 22 of the conveyor belt 2 to avoid contact of the connecting members 73 with the side portions 23 of the conveyor belt 2, thereby 2 damage can be prevented. Since the side rollers 74 rotate around the second rotating shaft 9 extending in the vertical direction, the movement of the conveyor belt 2 in the conveying direction is not hindered even when the side rollers 74 are in contact with the side portions 23 of the conveyor belt 2 .

Since the outer diameter D1 of the main roller 71 is at least 1 time the width W1, the main roller 71 generally has a laterally long cross section along the axial direction (the outer diameter D1 is less than 1 time the width W1). As a result, the width W1 of the main roller 71 becomes relatively narrow. This makes it easy to arrange the side rollers 74 and the main rollers 71 between the side portions 23 of the conveyor belt 2 . Specifically, when the outer diameter D1 of the main roller 71 is less than 1 times the width W1, the width W1 of the main roller 71 is relatively enlarged, so that only the width direction both side ends of the main roller 71 are conveyed. As indicated by the two-dot chain line in FIG. 6, the main roller 71 tends to overturn due to contact with the belt 2 . Further, for example, when the outer diameter D1 of the main roller 71 is 10 times larger than the width W1, the width W1 of the main roller 71 is relatively narrow, so the contact surface of the main roller 71 with respect to the conveyor belt 2 is narrow. , easy to fall.

Since the widthwise outer end of the side roller 74 is located outside the widthwise outer end of the connecting member 73 , the side roller 74 reaches the side portion 23 of the conveyor belt 2 before the connecting member 73 . Since it contacts, the contact of the connecting member 73 with the conveyor belt 2 can be more reliably avoided.

As shown in FIG. 4, the side rollers 74 and the main rollers 71 are offset in the conveying direction, so interference between the side rollers 74 and the connecting member 73 can be avoided. As compared with the case where the rotational axis O2 of the side roller 74 and the rotational axis O1 of the main roller 71 are aligned in the conveying direction, the side roller 74 can be easily assembled. Further, for example, by reducing the offset in the conveying direction of the side rollers 72 and bringing them closer to the main rollers 71, for example, when the conveyor belt 2 is made of a material that is easily deformed, the distance L3 between the main rollers and the side rollers becomes narrower and the connecting member Contact with the conveyor belt 2 of 73 can be avoided.

As shown in FIG. 7, the side rollers 74 are arranged on the side plate 72 between the first rotation shafts 8 of the adjacent main rollers 71 (within the range of L1). In addition, compared to the case where the dimension from the first rotation shaft 8 to the end of the side plate 72 is extended in order to arrange the side roller 74 outside between the first rotation shafts 8 of the adjacent main rollers 71, The amount of overlap in the conveying direction between the side plates 72 provided between the first rotating shafts 8 of the main rollers 71 can be reduced. Specifically, the overlap amount L21 between the inner side plate 72a and the outer side plate 72b can be made smaller than the overlap amount L22 between the inner side plate 72a and the outer side plate 72b indicated by the two-dot chain line in FIG. .

This suppresses interference between the side plates 72 (the portion where the inner side plate 72a and the outer side plate 72b overlap) that may occur when the test chain 7 is bent in the conveying direction of the conveyor belt 2. , the test chain 7 can be easily bent in the conveying direction of the conveyor belt 2 . As a result, for example, even when the conveyor belt 2 is bent with respect to the conveying direction, the test chain 7 can easily follow the shape of the conveyor belt 2 .

In the above embodiment, the vertical position of the side rollers 74 is aligned with the vertical position of the rotating shaft 8 of the main roller 71, but this is not the only option. 8, the vertical position of the side roller 174 may be offset below the rotation axis O1 of the main roller 71, as in the first modification shown by the solid line in FIG. As an example, the vertical position of the side roller 274 may be offset upward with respect to the rotation axis O1 of the main roller 71 . The vertical offset amount H1 of the side rollers 174 and 274 from the rotation axis O1 of the main roller 71 may be set to ±25% with respect to the outer diameter D1 of the main roller 71, for example. In this embodiment, the outer diameter D1 of the main roller 71 is set to 170 mm, so the vertical offset amount H1 may be set to -42.5 mm or more and 42.5 mm or less. When the vertical positions of the side rollers 174, 274 are offset, the mounting position of the bracket supporting the side rollers 174, 274 is offset upward or downward by extending the vertical dimension of the side plate 72 upward or downward. may

By positioning the side rollers 174 below the rotation axis O1 of the main roller 71 as in the first modification, the vertical position of the side rollers 74 rotates as in the embodiment shown by the two-dot chain line in FIG. The width (space between the side portions 23) between the side portions 23 of the conveyor belt 2 rising from the bottom portion 22 of the conveyor belt 2 (space between the side portions 23) can be increased (widened) as compared with the case of being aligned with the axis O1. It is easy to separate the conveyor belt 2.

By positioning the side rollers 274 above the rotation axis O1 of the main roller 71 as in the second modification, the vertical position of the side rollers 74 rotates as in the embodiment shown by the two-dot chain line in FIG. Compared to the case where the conveyor belt 2 coincides with the axis O1, for example, in the case of a bag-shaped conveyor, etc., in the case where the conveyor belt 2 is made of rubber that is difficult to spread in the width direction, the pair of side rollers 72 sandwiched between the side portions 23 of the conveyor belt 2 receive. load can be reduced.

In the above embodiment, it has been described that the side rollers on both sides in the width direction are symmetrical, but the present invention is not limited to this. In combination with the modification, the first side roller 174a on one side in the width direction and the second side roller 174b on the other side may be vertically offset.

As a result, for example, even when the shape of the conveyor belt 2 where the test chain 7 is installed is left-right asymmetrical, or when the tension on one side of the side portion 23 of the conveyor belt 2 increases, overturning of the main roller 71 can be suppressed. . More specifically, when the tension on one side of the side portion 23 of the conveyor belt 2 increases, the bottom portion of the conveyor belt moves toward one side, so that the portion of the main roller that is in contact with the conveyor belt at the bottom moves to one side. 9, the main roller 71 as a whole tends to overturn to the other side. On the other hand, by setting the vertical position of the second side roller 174b on the other side lower than the vertical position of the first side roller 174a on the one side, compared to the case where the vertical position is set higher, When overturning to the other side, the second side roller 174b is easily brought into contact with the side portion 23 of the conveyor belt 2, and overturning of the main roller 71 can be suppressed.

Even if the widthwise outer end of the first side roller 274a is located outside the widthwise outer end of the second side roller 274b as in the fourth modification shown in FIG. good. Accordingly, by positioning the first side rollers 274a arranged above the second side rollers 274b to the outside in the width direction of the second side rollers 274b, the side portions 23 of the conveyor belt 2 expanding upward can be It is easy to arrange the test chain 7 along. Further, for example, as indicated by the two-dot chain line in FIG. 10, when the shape of the conveyor belt 2 at the location where the test chain 7 is installed is left-right asymmetrical, the widthwise outer end of the first side roller 274a is the second side roller 74b. By arranging the test chain 7 outside the position of the outer end in the width direction of the , the test chain 7 can be easily made to follow the conveyor belt 2 .

In the above embodiment, the configuration in which the test chain 7 has the side rollers 74 whose width is smaller than the outer diameter has been described. In addition, the side rollers 374 may have a width larger than the outer diameter. As a result, the side rollers 74 contact the side portions 23 of the conveyor belt 2 over a wider surface than the side rollers 74 having a width smaller than the outer diameter, so that the test chain 7 can be easily supported with respect to the conveyor belt 2 .

In the above embodiment, it was explained that the second rotation axis O2 of the side roller 74 extends in the vertical direction. As an example, the second rotation axis O2 of the side roller 474 may be inclined with respect to the vertical direction. Specifically, the side roller 474 may be inclined such that the upper side of the second rotation axis O2 is located outside the lower side. As a result, the side rollers 474 are arranged to be inclined with respect to the vertical direction, and can easily follow the shape of the conveyor belt 2 (the shape from the bottom portion 22 to the side portions 23). In particular, it is possible to suppress a state in which only the outer end portion of the side roller 374 in the width direction contacts the side portion 23, which can occur when the side roller 374 having a width larger than the outer diameter is employed.

In the above embodiment, the configuration in which the bracket 75 of the side roller 74 is fixed to the side plate 72 has been described, but the present invention is not limited to this. As in an eighth modified example indicated by a dashed line, the bracket may be replaced by a rod-like arm member (for example, a tension rod having a telescopic function) 175 that can be stretched in the width direction. As shown in the seventh modified example of FIG. 12, the side rollers 574 are connected to a connecting member (for example, a hinge that opens upward) so as to be rotatable with respect to the arm member 175 about an axis extending along the conveying direction. ) 175a. Further, as shown in the eighth modification of FIG. 12, the arm member 175 is connected to a connecting member (for example, an upward-opening hinges, etc.) 175b. As a result, even when the width of the conveyor belt 2 changes as indicated by the solid line and the two-dot chain line in FIG. 12, the side rollers can easily conform to the shape of the conveyor belt.

In the above embodiment, a pair of side plates 72 are provided on both sides of the adjacent main roller 71 in the width direction. In addition, the side plates 72 may alternately connect the main rollers 71 to the left and right. In other words, the side plate 72 may be provided only on one side in the width direction between the adjacent main rollers 71 .

In the above-described embodiment, the first side roller 74a and the second side roller 74b are arranged at the same position in the conveying direction. As in a modification, the positions of the first side roller 74a and the second side roller 74b may be offset in the conveying direction.

In the above embodiment, the side plates 72 are provided on both sides of the adjacent main roller 71 in the width direction. Moreover, the side plates 172 may be connected by an upper surface portion that connects the upper ends, and may be formed in an inverted U-shaped cross section that opens downward when viewed in the conveying direction.

In the above embodiment, the auxiliary member is composed of the side rollers 74, but it is not limited to this. good too.

The present invention is not limited to the configurations described in the above embodiments, and various modifications are possible.

REFERENCE SIGNS LIST 1 conveyor scale 2 conveyor belt 7 test chain 8 first rotating shaft 9 second rotating shaft 71 main roller 72 side plate (side member)
73 connecting member 74 side roller (auxiliary member)
74a First side roller 74b Second side roller D1 Outer diameter W1 Width

Claims (9)

a plurality of main rollers arranged along the conveying direction of the conveyor scale;
side members disposed on both sides of the main roller in the width direction and supporting first rotation shafts of the adjacent main rollers;
a connecting member that connects the side member to the first rotating shaft from the outside;
and an auxiliary member attached to the widthwise outer side of the side member to assist movement of the plurality of main rollers in the conveying direction. 2. The test chain according to claim 1, wherein the main roller has an outer diameter equal to or greater than the width thereof. 3. The test chain according to claim 1, wherein the widthwise outer end of the auxiliary member is located outside the widthwise outer end of the connecting member. 4. A test chain according to any one of claims 1 to 3, wherein said auxiliary member is a side roller having a second rotating shaft extending in a direction intersecting said first rotating shaft. The test chain according to any one of claims 1 to 4, wherein the auxiliary member and the main roller are offset in position in the conveying direction. 6. The test chain according to any one of claims 1 to 5, wherein the auxiliary member is arranged on the side member between the first rotation shafts of the adjacent main rollers. The test chain according to any one of claims 1 to 6, wherein the auxiliary member is vertically offset with respect to the first rotating shaft. The auxiliary member has a first auxiliary member on one side in the width direction and a second auxiliary member on the other side,
The test chain according to any one of claims 1 to 7, wherein the second auxiliary member is arranged below the first auxiliary member. The auxiliary member has a first auxiliary member on one side in the width direction and a second auxiliary member on the other side,
The test chain according to any one of claims 1 to 8, wherein the outer edge of the first auxiliary member is located outside the outer edge of the second auxiliary member.

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