JP4527241B2 - Weighing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a weighing device for weighing an article while being conveyed, and belongs to the field of weighing technology.
[0002]
[Prior art]
In general, in the article conveyance line, for example, when small confectionery such as rice cake is conveyed, the confectionery is wrapped one by one in a child bag and then conveyed to a weighing conveyor while being conveyed by the weighing conveyor. A weight inspection is performed, and an article which is determined to be defective by the weight inspection is excluded from the above-described conveyance line.
[0003]
By the way, in the weighing conveyor arranged in this kind of conveyance line, the article conveyed on the conveyance line is transferred onto the weighing conveyor, and the article is weighed by the load detector provided in the weighing conveyor. After the weighing value is stabilized, the stable weighing value is determined as the weight of the article, and after the article is carried out of the weighing conveyor, the next article is transferred onto the weighing conveyor. Therefore, the articles conveyed by the conveyance line are arranged at a certain interval and conveyed onto the weighing conveyor.
[0004]
On the other hand, in the above-mentioned conveyance line, in order to improve the efficiency of conveyance work, it is required to increase the article conveyance speed. Therefore, while each article is weighed by the weighing conveyor and the measured value is stabilized, the conveyance speed is increased while ensuring the minimum so that the article is placed on the weighing conveyor. is there.
[0005]
Conventionally, in this type of transport line, the diameter of the rollers adjacent to each other of the transport conveyor and the weighing conveyor is larger than that of a small article such as a bag, so that the article falls into the gap between the transport conveyor and the weighing conveyor. I couldn't get on smoothly. For this reason, it becomes difficult to keep the interval between the articles conveyed to the weighing conveyor constant, the articles cannot be accurately measured, and the articles regarded as defective on the weighing conveyor are surely excluded from the conveying line. I couldn't. In addition, when the article is transferred from the conveyor to the weighing conveyor, the article vibrates greatly due to the gap, and the article vibrates on the weighing conveyor. There were problems such as.
[0006]
Here, in order to solve the above-mentioned problem, as disclosed in Japanese Patent Laid-Open No. 9-210773, either an article carry-out side roller of the transport conveyor or an article carry-in side roller of the weighing conveyor In addition, both ends are supported by a pair of bearings having a diameter larger than that of the roller, and the width of the pair of bearings supporting the roller on the conveyor side is determined by the interval between the pair of bearings supporting the roller of the weighing conveyor. Conveyance configured to reduce the gap between the rollers adjacent to each other between the conveyor and the weighing conveyor by placing the bearing on the conveyor side inside the bearing on the weighing conveyor side. The device is known.
[0007]
[Problems to be solved by the invention]
However, since the both ends of the rollers on the conveyor side are supported by bearings having a diameter larger than that of the rollers, the conveyor device supports the bearings on the conveyor side and both ends of the rollers on the weighing conveyor side. Even if it is made to enter between the bearings and the rollers on the conveyor side of the article carry-out side approach the rollers on the article conveyor side of the weighing conveyor, the bearing on the conveyor side becomes an obstacle, and the interval between these rollers is set on the conveyor side. The bearing radius could not be made smaller. For this reason, a gap is still formed between the roller on the article carry-out side of the conveyor and the roller on the article carry-in side of the weighing conveyor, and the above problem has not been solved sufficiently.
[0008]
Accordingly, it is an object of the present invention to provide a roller structure of a transport device that facilitates the transfer of articles from a transport conveyor to a weighing conveyor, maintains a constant interval between the articles, and does not reduce the weighing accuracy. .
[0009]
[Means for Solving the Problems]
In order to solve the above problems, each invention of the present application is configured as follows.
[0010]
First, the invention according to claim 1 of the present application (hereinafter. Referred to as a first invention), in the metering device and the downstream of the metering conveyor conveyor and the conveyor for conveying articles disposed adjacent said conveyor and the roller of the article carry-out side of the roller of the article carry-in scale conveyor adjacent to said roller, both, the end portion is supported through a bearing, and with the other end a free state, cantilever while supporting the Jo, these rollers, a smaller diameter than the bearing for supporting one end portion, respectively, and the bearing for supporting one end portion of both rollers respectively, as well as arranged in different positions with respect to the article conveying direction One of the rollers is a bearing that supports one end of the other roller, and the other roller is a bearing that supports one end of the one roller. To ring, both characterized by being disposed to overlap the article transport direction.
[0011]
Next, the invention according to claim 2 of the present application (hereinafter, referred to. The second invention), in the metering device of the first invention, the article discharge side of the conveyor rollers and, of the article carry-in side of the scale conveyor The roller is made of ceramic.
[0012]
The invention according to claim 3 of the present application (hereinafter. Referred to as a third invention), above the metering device of the second invention, the roller of the article take-out side of the conveyor, rollers of the article carry-in side of the scale conveyor preparative both, the press-fitting the one end portion to the sleeve, the sleeve, characterized in that fitted into the bearing.
[0014]
By configuring as described above, the following operations can be obtained according to the inventions of the present application.
[0015]
First, according to the first aspect of the present invention, both the article carry-out side roller of the transport conveyor and the article carry-in side roller of the weighing conveyor support only one end portion through the bearing, and these rollers are A bearing having a smaller diameter than the bearing and supporting the one end of each of the rollers is disposed at a different position with respect to the article conveying direction , and one of the rollers is one end of the other roller. Since the other roller is arranged so as to overlap with the bearing supporting one end of the one roller in the article conveying direction, the roller is supported regardless of the size of the bearing. Can be placed close to each other. Therefore, the distance between the centers of the rollers can be extremely reduced, and even when a small article is conveyed at high speed, the article can smoothly transfer from the upstream conveyor to the downstream conveyor. It becomes like this. As a result, the interval between the articles conveyed at a certain interval can be maintained, and the articles conveyed can be weighed more precisely.
[0016]
Here, the roller of the article out side of the conveyor, the a roller of the article carry-in scale conveyor, because it is wound around the belt for the article transport respectively, the constant tension in the said roller takes become. On the other hand, only one end of these rollers is supported by a bearing, and the other end is in a free state.
[0017]
Therefore, according to the second invention, the roller of the article take-out side of the conveyor, and a roller of the article carry-in weighing conveyor, since both were increased rigidity of the roller in the ceramic, one end of the rollers Even if only the roller is supported, there is no possibility that the roller bends due to the tension as described above. Moreover, by making the rollers of the weighing conveyor ceramic, the weighing conveyor is reduced in weight, the tare weight is reduced, and the weighing accuracy is further improved.
[0018]
And according to the said 3rd invention, since both the roller by the side of goods conveyance of the conveyance conveyor and the roller by the side of goods conveyance of a measurement conveyor press-fit one end part to the sleeve, this sleeve was inserted in the bearing. The tension applied to the roller is received by the entire sleeve. Therefore, these rollers are difficult to break from one end supported by the bearing.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0021]
As shown in FIGS. 1 and 2, a packaging machine (not shown) for wrapping small articles such as bags with a film or the like is disposed on the upstream side of the conveyance line 1 for conveying the articles. A weighing conveyor 20 that detects the weight of the article is disposed downstream of the first conveyor 10 that conveys the downstream. A second transport conveyor 40 is disposed downstream of the weighing conveyor 20.
[0022]
The first conveyor 10 is provided with a first carry-in roller (not shown) provided on the article carry-in side and a first carry-out roller 11 provided on the article carry-out side, and between these rollers, A pair of conveyor belts 12 and 12 that convey articles are wound in parallel. Then, when the first carry-in roller is driven by a motor (not shown), the article X (see FIG. 3) placed on the conveyor belts 12 and 12 moves from the upstream side to the downstream side in FIG. It is conveyed in the direction of arrow A.
[0023]
Here, the first carry-out roller 11 is in the form of an elongated rod made of ceramic, one end of the roller 11 is supported by a bearing unit 13 described later, and the other end is in a free state. The first carry-out roller 11 has a diameter smaller than that of the bearing unit 13, and the bearing unit 13 is fixed to a fixed frame 14 provided on one side surface with respect to the article conveying direction.
[0024]
In addition, a top plate 15 is disposed between the first carry-in roller and the first carry-out roller 11 so as to be attached to the fixed frame 14, and the top belt 15 does not loosen the conveyor belts 12 and 12. So that it is supported.
[0025]
On the other hand, the weighing conveyor 20 is provided with a first roller 21 provided on the article carry-in side and a second roller 22 provided on the article carry-out side, and conveys the article between these rollers 21 and 22. A conveyor belt 23 is wound around. The second roller 22 is driven by a motor 24 so that the article X placed on the conveyor belt 23 is conveyed from the upstream side to the downstream side.
[0026]
Here, the first roller 21 is in the form of an elongated rod made of ceramic, similar to the first carry-out roller 11, and the second roller 22 is larger in diameter than the first roller 21 and made of ceramic. It is made into the shape of an elongated bar. One end portions of the first and second rollers 21 and 22 are supported by bearing units 25 and 26, respectively, and the other end portions are in a free state. And these both bearing units 25 and 26 are arrange | positioned in the position which is different with respect to the said fixed frame 14 and an article conveyance direction.
[0027]
A top plate 27 is disposed between the first and second rollers 21 and 22 so that the conveyor belt 23 is not loosened. The top plate 27 supports the second roller 22. The unit 26 is attached with bolts 28 and 28. Both bearing units 25 and 26 are coupled via connecting members 29 and 29, and the bearing unit 25 that supports the first roller 21 is moved in the article transport direction by operating an adjusting means (not shown). It can be made to.
[0028]
Further, an arm portion 30 extending downward is fixed to the lower surface of the top plate 27, and the arm portion 30 is attached to a load detector 31 constituted by a load cell or the like. Inside the machine base 32. Then, the weight of the article X conveyed on the weighing conveyor 20 is measured by the load detector 31.
[0029]
Therefore, as shown in FIG. 3, the distance between the axial centers of the first carry-out roller 11 of the conveyor 10 and the first roller 21 of the weighing conveyor 20 is made much smaller than the size of the article X being conveyed. be able to. As a result, when the article X is transferred from the conveyor 10 to the weighing conveyor 20, it can be transferred smoothly.
[0030]
Further, the second conveyor 40 is provided with a second carry-in roller 41 provided on the article carry-in side and a second carry-out roller (not shown) provided on the article carry-out side. Further, a pair of conveying belts 42 and 42 for conveying the articles are wound in parallel. The second carry-out roller is driven by a motor (not shown), so that the article X placed on the conveyor belts 42 and 42 is conveyed from the upstream side to the downstream side.
[0031]
Here, the second carry-in roller 41 is in the form of an elongated rod made of ceramic, one end of the roller 41 is supported by the bearing unit 43, and the other end is in a free state. The bearing unit 43 is fixed to a fixed frame 14 provided on one side surface with respect to the article conveyance direction.
[0032]
Further, a top plate 44 is disposed between the second carry-in roller 41 and the second carry-out roller so as to be attached to the fixed frame 14, and the transport belts 42 and 42 are not loosened by the top plate 44. So that it is supported.
[0033]
The bearing units 13 , 25, 26, and 43 have the same structure, and here, the bearing unit 25 that supports the first roller 21 as a representative of the bearing units 13 , 25, 26, and 43. Will be described.
[0034]
The bearing unit 25 includes first and second bearings 51 and 52 arranged with a spacer 50 interposed therebetween. Outer portions 51 a and 52 a of the first and second bearings 51 and 52 are provided in the bearing unit 25. In addition to being fixed inside the hole 53, a sleeve 54 having a flange on one end side is fitted and fixed inside the inner 51 b, 52 b of the first and second bearings 51 , 52 . Then, by one end of the first roller 21 is press-fitted into the sleeve 54, the first roller 21 is rotatably supported with the inner 51b, 52 b and the sleeve 54.
[0035]
In the present embodiment, the transfer of articles from the weighing conveyor 20 to the second transfer conveyor 40 is not performed smoothly, and even if the interval between the articles is somewhat disturbed, the subsequent transfer operation is not significantly affected. the second roller 22 and a second feed-in rollers 41, than the first discharge rollers 11 and the first roller 21 and a large diameter, but to enhance the strength of the roller, these and the second roller 22 and the second feed-in rollers 41 is made to have the same diameter as the first carry-out roller 11 and the first roller 21 and the second roller 22 and the second carry-in roller 41 are brought close to each other, thereby transferring articles from the weighing conveyor 20 to the second transfer conveyor 40. May be smooth.
[0036]
【The invention's effect】
As described above, according to the first aspect of the present invention, both the roller on the article carry-out side of the transport conveyor and the roller on the article carry-in side of the weighing conveyor are supported only at one end via the bearing, and these rollers Is smaller than the bearing, and the bearings that respectively support the one end portions of the two rollers are arranged at different positions with respect to the article conveying direction , and one of the rollers is a roller of the other roller. For the bearing that supports one end, the other roller is arranged so as to overlap with the bearing that supports one end of the one roller in the article transport direction , regardless of the size of the bearing. The rollers can be arranged close to each other. Therefore, the distance between the centers of the rollers can be extremely reduced, and even when a small article is conveyed at high speed, the article can smoothly transfer from the upstream conveyor to the downstream conveyor. It becomes like this. As a result, the interval between the articles conveyed at a certain interval can be maintained, and the articles conveyed can be weighed more precisely.
[0037]
Next, according to the second aspect of the invention, since the rollers on the article conveyor side of the conveyor and the rollers on the article conveyor side of the weighing conveyor are both made of ceramic and the rigidity of the rollers is increased, one end of these rollers Even if only the roller is supported, there is no possibility that the roller bends, and the conveyor is reduced in weight without impairing the durability of the roller.
[0038]
Then, according to the third invention, the roller of the article take-out side of the conveyor, and a roller of the article carry-in scale conveyor, either by press-fitting the one end portion to the sleeve, since the fitting of the sleeve to the bearing, The tension applied to the roller is received by the entire sleeve. Therefore, these rollers are difficult to break from one end supported by the bearing.
[0040]
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a conveyance line in which a weighing conveyor incorporating a roller support structure according to an embodiment of the present invention is arranged.
FIG. 2 is a schematic side view of the transfer line.
FIG. 3 is an arrow view cut along the AA line in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conveyance line 10 1st conveyance conveyor 11 1st carrying-out rollers 14 and 25 Bearing unit 20 Weighing conveyor 21 1st roller 51 1st bearing 52 2nd bearing 54 Sleeve

Claims (3)

A metering device in which the downstream of the metering conveyor conveyor and the conveyor for conveying articles disposed adjacent the roller of the article take-out side of the conveyor, the article carry-in of the metering conveyor adjacent to said roller Each of these rollers is supported in a cantilever manner with one end supported through a bearing and the other end free, and these rollers support one end respectively. The bearings having a smaller diameter than the bearings and supporting the one end portions of the two rollers are disposed at different positions with respect to the article conveying direction, and one of the rollers is the other of the two rollers. In contrast to the bearing that supports one end of each roller, the other roller is in the article transport direction with respect to the bearing that supports one end of the one roller. Weighing apparatus characterized by being arranged by Barappu. 2. The weighing apparatus according to claim 1, wherein the roller on the article carry-out side of the conveyor and the roller on the article carry-in side of the weighing conveyor are made of ceramic. Wherein the roller of the article take-out side of the conveyor, the article carry-in side of the rollers of the weighing conveyor, either, one end portion is press-fitted into the sleeve, that the sleeve is fitted in the bearing The weighing device according to claim 2.

Images