JPH066099Y2 - Product weight determination device - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The disclosed technology sets the weight of the product when sorting the products packaged by weighing a given weight in a confectionery manufacturing factory. Those that do not fall within the permissible range belong to the technical field of the structure of an apparatus for determining the weight of goods during sorting and transportation in order to remove them during transportation.

<Summary of Summary> The invention of the present application is a device for determining the weight of a product, which is connected to a take-in conveyor for packaged products and is also connected to a sorting conveyor. A weight detection device such as a load cell is provided, and a sub-frame is placed on the upper part of the frame by tensioning a flat belt on the front and rear driven rollers and the drive roller, and the drive roller is mounted on the motor provided on the frame. The invention relates to a device for determining the weight of a product that is linked through a timing belt or the like, and in particular, a bearing housing is provided on a side portion of a frame of the device, and a predetermined angle is turned around an output gear of a motor provided on the frame. The bearing housing is adjustable to adjust its posture, and an eccentric gear is installed inside the bearing housing at an eccentric position to engage the output gear of the motor. In addition, the eccentric gear rotates while meshing with the output gear of the motor when adjusting the rotational movement position of the bearing housing, and a predetermined tension is applied to the belt between the eccentric gear pulley and the drive pulley pulley. The invention relates to a device for determining the weight of a product to be stretched.

<Prior Art> As is well known, people's lives have become richer, and a variety of products have been introduced even in their consumption mode. Therefore, the supply side must also provide a stable supply of a wide variety of products. It's starting to happen.

Thus, for example, in manufacturing factories for measuring and packaging products such as confectionery, various types of products are packaged and sorted according to set unit weights. Although it is designed to match the weight or to be added with the minimum minimum amount, there are cases where there is an excess or deficiency of the quantity due to an unforeseen situation in the weighing or packaging process. Therefore, when sorting, the set weight is set. There is a step of sorting only the products whose excess or deficiency of weight is within the set range and removing the products that are out of these ranges. In such a step, the product weight determination device 1 as shown in FIG. It is used.

Thus, the weight determination device 1 is a take-in conveyor device 3 connected to the carry-out conveyor 2 from the preceding packaging device.
And a weight determination device main body 5 for a sorting conveyor 4 having a jumping device (not shown) for removing products outside the range of the allowable weight of the next stage are arranged in series on the base 6,
While the product 7 conveyed from the preceding packaging process is conveyed on the weight determination device main body 5, its weight is instantly detected by a weight detection device such as a load cell (not shown), and the display device 8 detects the detected weight and the weight. In addition to displaying the excess or deficiency, the jumping device of the sorting conveyor 4 is operated.

By the way, the products handled by the seed weight determination device 1 are mostly food items, and therefore, the function of the device is stabilized unless maintenance such as cleaning and maintenance is performed regularly or irregularly. It may not be possible to exert it due to
Cleaning such as washing with water is necessary to maintain the hygienic condition of the handling device.

<Problems to be Solved by the Invention> In the conventional type weight determination device 1, the flat belt 9 is stretched between the driving roller and the driven roller to detect the weight while conveying the product 7. However, the belt stretched between the pulley 10 of the drive roller and the pulley 11 of the motor must be removed during maintenance such as water washing as described above so that the flat belt 9 can be removed from the drive roller and the driven roller. Therefore, maintenance such as water washing and maintenance and inspection cannot be performed.

Therefore, when the belt between the drive roller pulley 10 and the motor pulley 11 is removed for the maintenance, it is extremely difficult and troublesome to apply a predetermined tension at the time of reassembly.

If a predetermined tension is not applied to the belt, the speed of the flat belt 9 changes and the baton touch of the product 7 to the take-in conveyor device 3 and the sorting conveyor 4 does not go well, so that the flat belt 9 is not touched. There was a problem that the disturbance of the product 7 occurred.

Therefore, it is extremely important to apply a predetermined tension in disassembling and assembling the belt between the pulley 10 of the drive roller and the pulley 11 of the motor, and therefore, the operation requires skill, and the weight determination device 1 is required to perform the operation. There is a drawback that the operation stop time becomes long and the efficiency becomes poor.

Further, if the structure is such that the tension that is set is always applied to the belt during disassembly and assembly, the structure becomes extremely complicated, resulting in the disadvantage of increased cost. Since the watertight structure for the weight detection device such as the load cell and the motor installed inside is not sufficient in the conventional technology, it may be washed with water due to the risk of water infiltration into the internal mechanism when removing and reassembling the belt. Therefore, there is a problem that maintenance work such as cleaning is troublesome because the work is performed separately for showering with cleaning water and wiping when cleaning the entire apparatus.

By the way, although a completely waterproof and compact motor has recently been commercialized, and research and development by the applicant has led to the practical application of a load cell of a water-proof type. Since the weight determination device itself has not been designed to be disassembled and assembled or adjusted as quickly as possible, the frustration has become ignorable in the field work of confectionery makers.

And this is not limited to the weight determination device itself,
The take-in conveyor device or the like does not have a weight detecting device, and the problems in other operating parts are the same.

<Purpose of Invention> The purpose of the invention of the present application is to provide a moving part associated with disassembling and assembling the device for maintenance such as cleaning at the time of weight judgment of a product in a weighing package product manufacturing factory of a confectionery maker based on the above-mentioned conventional technique. The technical problem to be solved is to solve the problem of adjustment, and when disassembling and assembling the flat belt, etc., which is placed in an overhang state with respect to the device frame, together with the subframe, quickly and without damaging the mechanical part. It is intended to provide an excellent weight determination device for a product, which can apply tension to the belt and speedily perform maintenance such as cleaning of each mechanism portion, which is useful in the field of maintenance technology in the distribution industry.

<Means and Actions for Solving the Problems> In order to solve the above-mentioned problems, the structure of the invention of the present application, which is based on the above-mentioned utility model registration request, is manufactured in order to solve the above-mentioned problems. In the process of sorting products for suitability and improperness in factories, the products conveyed from the packaging process in the previous stage are conveyed from the take-in conveyor to the product weight determination device, and then on the flat belt of the weight determination device body. In the process of transportation, the weight of the product is immediately detected by the weight detection device such as the load cell installed in the equipment frame, and the excess or deficiency of the allowable range of the set weight is calculated, and the product is suitable or inappropriate. It is determined whether or not the products that are out of the allowable range are removed by the jumping device in the next-stage sorting conveyor, and only suitable products are conveyed to the next-stage sorting process, etc. Thus, during maintenance such as cleaning of the weight determination device, the operation of the device is stopped, and the subframe pivotally supporting the drive roller and the driven roller, which stretches the flat belt, is removed from the frame, while The timing belt stretched between the pulley of the motor provided in the frame and the pulley of the drive roller of the body of the weight determination device is also loosened, and the weight determination device is disassembled. Stable and sufficient maintenance such as cleaning is performed at that time, at that time, the bearing housing having the pulley on the motor side with respect to the drive roller is removed from the frame housing, and the eccentric gear installed is removed from the output gear of the motor. , The internal output gear and motor are inspected, and after the maintenance such as cleaning is completed, the bearing housing becomes the frame housing. Assembled rumored seal through the socket portion and,
The eccentric gear of the bearing housing is made to mesh with the output gear of the motor, and the bearing housing is swung with respect to the frame by a predetermined angle, and the eccentric gear is swung while meshing with the output gear, and the pulley and the drive roller on the outside thereof. The desired tension of the belt to be engaged with the pulley is fixed to the frame, and the bearing housing is fixed to the frame in that state. It is a technical measure that enables it to be put into operation again after a period of time when the device is stopped.

<Embodiment> An embodiment of the invention of this application will be described below with reference to FIGS. It should be noted that parts that are the same as those in FIG. 15 will be described using the same reference numerals.

Similar to the conventional embodiment shown in FIG. 15, the embodiment shown in the drawing is connected to a sorting conveyor for removing a product having a weight outside the allowable range of the next stage from the packaging process in a manufacturing factory of a weighing and packaging product such as a confectionery maker. As shown in FIGS. 1 and 3, the take-in conveyor device 3 and the weight determination device main body 5 are connected in series, and the connection ends of the flat belts 13 and 14 are connected to each other. It is arranged so as to be slightly opposed to each other.

Then, the take-in conveyor device 3 for the flat belts 13 and 14 and the flat belts 13 and 1 in the weight determination device main body 5
Since the stretched state of 4 is substantially the same, the weight determination device main body 5 side will be described. A bearing fixedly provided at both front ends (right side in the figure) of the subframe 16 having the top plate 15 will be described. A flat belt 14 is stretched between a pivotally supported drive roller 17 and a driven roller 22 provided at the rear portion.

Thus, the front end of the flat belt loosening mechanism 19 and the other end of the subframe 16 on one side of the rear end of the subframe 16 (on the left side in the drawing) of FIG. One end of the flat belt 14 is attached to the ball bearing 21 shown in FIG.
A driven roller 22 and a drive roller 17 which can be horizontally swung along
And the flat belt 14 gives a predetermined tension between
It is installed in a loosened state and stretched to be removable.

The upper lower surface of the flat belt 14 is in sliding contact with the upper surface of the top plate 15.

Then, a pair of bar-shaped support pins 23 are provided in parallel at predetermined positions on both front and rear portions of the sub-frame 16 at predetermined intervals in parallel.

A timing pulley 24 of the drive roller 17 is integrally formed between one end of the drive roller 17 and the sub-frame 16.

In the upper part of the frame 12 of the weight determination device main body 5, a fork-shaped hook 25 is integrally provided in the rear part of the frame 12 so as to form a hook groove 26 for the support pin 23 of the sub-frame 16. Further, another hook 25 'is provided upward at the front portion, and an oblique hook groove 26' for the support pin 23 of the sub-frame 16 is formed on the upper portion of the hook 25 'by inclining to the driven roller 22 side by a set angle. The drive roller 17, the driven roller 22, and the driven roller 22, on the left and right sides of the support pins 23, 23, respectively.
It supports the total weight of the sub-frame 16, the top plate 15, and the flat belt 14.

Therefore, when attaching / detaching the sub-frame 16 together with the driving roller 17 and the driven roller 22, each support pin on the front part is assembled.
23 is inserted into the oblique hook groove 26 ′ of the hook 25 ′, the subframe 16 is pivoted up and down around the front support pin 23, and the rear support pin 23 is dropped into the hook groove 26 of the hook 25. When the sub-frame 16 is disassembled and removed, as shown in FIG. 8, the rear support pin 23 is inserted into the hook groove of the front hook 25 'in the reverse process to the above process.
The support pin 23 inserted into the 26 'is pivoted upward to remove it from the hook 25, and then the front support pin 23 is slanted toward the rear of the hook 25' from the hook groove 26 'toward the rear. It can be removed extremely smoothly by pulling it out.

Further, in the flat belt loosening mechanism 19, as shown in detail in FIG. 2, a slider 28 having a rectangular cross section along the longitudinal direction integrally connected to a rod 27 of a bearing 20 supporting a driven roller 22.
Is slidable in the longitudinal direction along a bracket 18 having a guide function of a rectangular cross section, as shown by the arrow, and a well-known flip-flop type squeeze device is provided between the slider 28 and the sub-frame 16. 29 is provided so that tension is applied to the flat belt 14 via the driven roller 22 in the closed position, and the tension is released in the open position to move the flat belt 14 from the driven roller 22 and the drive roller 17 to the side. It is designed so that it can be removed in one direction.

When the flat belt 14 is removed, since the sub-frame 16 is removed from the hooks 25 and 25 ', the flat belt 1
The 4 does not interfere with the hooks 25 and 25 '.

Thus, as shown in FIGS. 1, 3, and 4, the frame 12 has a housing 31 whose one side is sealed by a plate 51 via bolts 30, 30 ... Plate 51
Is integrally provided on one side, and a watertight motor 32 is fixedly installed inside thereof and a load cell 34 as a well-known weight detecting device is integrally formed in a cantilever system via bolts 33, 33. The other side of the load cell 34 is also fixed to the support bracket 35, which is integrally provided to extend upward on the base 6, through bolts 36, 36 in the same manner as a cantilever type. It supports all the weight of the determination device body 5, detects the weight increase of the product 7 which is baton-touched and conveyed from the take-in conveyor 13 via the flat belt 14, and inputs it to a microcomputer (not shown). There is.

In addition, a stopper 37 is fixed to the support bracket 35 by a bolt 38 via a guide groove (not shown) so as to be slidable up and down by a small distance and the mounting position can be adjusted, and a U-shaped cross section provided on the housing 31 side. The mounting position of the stopper 39 is determined by the adjusting screw 40 so as to stop the over-vibration of the weight determination device main body 5.

Then, the lower opening of the housing 31 and the support bracket 35
A waterproof diaphragm 41 is interposed between and in a watertight manner.

As shown in FIG. 1, a motor 32 is provided in the housing 31 'on the side of the take-in conveyor device 3, but the load cell 34 is not provided and the housing 31' has a base 6 '. Is directly supported via the support bracket 35.

Then, on one side of the housing 31, the third, fourth, and
As shown in FIGS. 9 to 14, a bearing housing 42 having a circular cross section on the base side is provided with a motor 32 through a spigot portion 43 and a waterproof seal 44.
As described below concentrically with the output gear 45 of the drive shaft, the eccentric gear 46 meshes with the output gear 45 by rotating the output gear 45 at an arbitrary angle to fix the position and orientation.
Is mounted via a bearing 47, and a timing pulley 48 concentrically provided outside the eccentric gear 46 is rotated.

A timing belt 49 is stretched between the timing pulley 48 and the timing pulley 24 of the drive roller 17.

Thus, the mounting posture of the eccentric gear 46 is fixed to the sub-frame 16 by rotating the output gear 45 of the motor 32 with respect to the housing 31 of the bearing housing 42 at an arbitrary angle. The tension of the timing belt 49 is adjusted and fixed by the bolts 50, 50 ... via the ring 53 that presses the 52 from the inside thereof, and therefore the timing belt 49 between the timing pulleys 24 and 48 is fixed. The tension of the bolt 5 is adjusted in advance by adjusting the turning motion of the output gear 45 of the motor 32 with respect to the housing 31 of the bearing housing 42 at a predetermined angle when assembled.
The flange portion 52 is attached to the housing 31 via the ring 0, 50, ...
By tightening and fixing it, it can be given in a predetermined manner.

Of course, via the labyrinth seal mechanism of the pilot part 43 of the bearing housing 42 and the watertight mechanism of the waterproof seal 44,
The water-tight function inside the housing 31 is always maintained by the lower diaphragm 41 even after the disassembly and assembly, and the waterproofness of the motor 32 and the load cell 34 is ensured against the cleaning by water discharge after the bearing housing 42 is removed. Guaranteed to be guaranteed.

In the above-described configuration, in the weight determination device 1 which is set and assembled in advance in the same manner as in the conventional mode shown in FIG. 15, the merchandise 7 that has undergone the preceding combination weighing process and packaging process is fed and collected. When the flat belt 13 of the loading conveyor device 3 is carried in the flat belt 14 of the weight determination device main body 5 in a baton-touch manner, the weight determination device main body is attached to the load cell 34 provided in a cantilever manner from the base 6 through the support bracket 35. Since the weight of the commodity 7 is added to the weight of the commodity 5, the load cell 34 immediately detects the increased weight and inputs it to a microcomputer (not shown) to display the weight on the display device 8 and the commodity 7. In addition to displaying the weight increase / decrease in the set allowable range, it also displays whether it is within or outside the allowable range, and controls the operation of the jumping device (not shown) provided in the next-stage sorting conveyor. Then, the products 7 conveyed from the weight determination device main body 5 to the sorting conveyor 4 in a baton-touch manner are fed to the sorting process or removed.

As described above, when the product 7 is a food product or the like, it is necessary to disassemble the weight determination device 1 periodically or irregularly to perform maintenance such as cleaning. First, the motor 32 is stopped, and the rear portion of the sub-frame 16 is lightly moved around the support pin 23 locked in the oblique hook groove 26 'of the front hook 25' as shown in FIG. Lift and swivel to lock the rear support pin 23 into the hook groove 26 of the hook 25.
When the sub-frame 16 is pulled out upward from the rear part, the support pin 23 at the front part is slid into the hook groove 26 'of the hook 25'.
Automatically disengages from the timing pulley 24 and the timing pulley 24 of the drive roller 17 moves rearward at the same time.
The timing belt 49 stretched between the bearing housing 42 and the timing pulley 48 of the bearing housing 42 is loosened, and the drive roller 17
Can be immediately removed from the timing pulley 24 of
Therefore, the flat belt 14, the driving roller 17, the driven roller 22
The sub-frame 16 which is equipped with the
It is dissociated from the product and can be directly used for maintenance work such as predetermined cleaning.

When the flat belt 14 is removed from the subframe 16 for cleaning, the squeeze vise 29 of the flat belt loosening mechanism 19 at the rear of the subframe 16 is swung forward as shown in FIG. The slider 28 moves forward, the bearing 21 also moves forward together with the rod 27, and one end of the driven roller 22 moves from the state shown in FIG. 5 to the state shown in FIG. 6 by the ball bearing 21 shown in FIG. As it swivels forward, the flat belt 14 therefore loosens between the drive roller 17 and the driven roller 22, where it can be removed from the drive roller 17 and the driven roller 22, as indicated by the arrow in FIG.

In this process, as described above, since the sub-frame 16 is removed from the hooks 25 and 25 ', the flat belt 14 does not interfere with the sub-frame 16 and can be immediately removed smoothly. Maintenance such as cleaning can be performed, and drive roller 17 and driven roller
It is possible to perform a predetermined cleaning operation on 22 and further on the sub-frame 16.

Next, when performing maintenance such as cleaning of the internal mechanism of the main body side frame 12, as described above, the timing belt 49 detached from the timing pulley 24 of the drive roller 17 of the sub frame 16 is attached to the timing pulley 48 of the motor 32 side.
Also removed from the bearing housing 42 bolts 50, 50 ...
The housing 31 is disassembled by disassembling the housing 31 in advance so that the housing 31 is disassembled, the bearing housing 42 is removed through the spigot portion 43, and the pulley 48 and the eccentric gear 46 are removed. Housing 42,
Also, the eccentric gear 46 is cleaned and maintained, and the motor 32 and the load cell 34 inside the housing 31 are maintained and inspected and cleaned.

In this manner, the flat belt 14, the disassembled bearing housing 42, the housing 31, the eccentric gear 46, the output gear, as well as the drive roller 17 and the driven roller 22 on the sub-frame 16 side are provided.
45 etc. will be washed properly and will be maintained and inspected.

At this time, even if water washing is performed, the function is not impaired by the watertight structure of the motor 32 and the load cell 34 which have been developed so far.

The above-mentioned maintenance such as cleaning can be performed not only on the weight determination device main body 5 side but also on the take-in conveyor device 3 in exactly the same manner, and the order may be set in a predetermined manner.

In this way, after the washing of the washable mechanism is completely completed, the assembly is performed again in the reverse operation of the above-described process to provide the weight selection of the products 7, but at that time, the tension adjustment of the timing belt 49 is performed. If it is not necessary, if it is necessary to adjust, first by performing the reverse operation to the above-mentioned operation, the sub-frame 16 in which the flat belt 14 is stretched around the drive roller 17 and the driven roller 22 by the above-mentioned reverse operation is set in the bearing housing 42. After the fitting to the housing 31 is completed, the support pins 23, 23 of the sub-frame 16 are set on the hooks 25, 25 'of the frame 12 without turning, and the tip end of the timing belt 49 is engaged with the timing pulley 24 of the drive roller 17. And the eccentric gear 46 of the bearing housing 42 is also engaged with the output gear 45 to tighten the bearing housing 42 to the housing 31 via the bolts 50, 50 ... Receiving housing 42
Are rotated with respect to the housing 31 through a spigot portion 43 having a circular cross-section on the base side of the housing 31, and the bolts 50, 50 ...

At this time, since the eccentric gear 46 in the bearing housing 42 pivots around the output gear 45 of the motor 32 during adjustment, there is no problem in the meshing relationship of torque transmission between the two.

In this way, all the mechanical parts are reassembled, but the assembly is performed in the same manner for the weight determination device main body 5 and the intake conveyor device 3, and the assembly sequence is completely arbitrary.

Further, the internal mechanism of the housing 31 can be disassembled as described above, and the position of the stopper 37 with respect to the stopper 39 can be freely adjusted by the adjusting screw 40.

Needless to say, the embodiment of the invention of this application is not limited to the above-described embodiment, and various embodiments such as engaging a tension pulley with a timing belt can be adopted.

Further, all the hook grooves of the hook can be directed upward, and further, a mode in which an arc-shaped long groove for inserting a bolt is formed in a ring integrally formed with the bearing housing can be adopted.

And, of course, the invention of this application can be applied to a so-called automatic weighing and pricing device for weighing and issuing a label while conveying goods by a weighing conveyor.

<Effects of the Invention> As described above, according to the invention of the present application, in a product weight determination device which is basically provided in a manufacturing factory of a weighing and packaging product such as a confectionery maker, sorting from the previous packaging process to the next packaging process is performed. Cleaning and maintenance of flat belts, drive rollers, and driven rollers on a regular and irregular basis in a weight detection device that is the basis for removing excess or deficient weight that falls outside the allowable range for the weight set during product transportation. When carrying out maintenance for inspection and maintenance, make sure the stationary fixed part and the operating part,
In addition, since it can be quickly disassembled, maintenance such as cleaning of each mechanism is surely performed, and not only the durability of the device but also the hygienic condition of the product can be always maintained, which is an excellent effect. It

Then, the belt stretched over the pulley of the drive roller of the subframe to be set and the pulley of the motor side disassembles the device,
By adjusting the position and orientation of the bearing housing due to the pivotal movement of a minute set angle with respect to the frame at the time of reassembling, an excellent effect that a desired tension can be applied is achieved.

Moreover, since the eccentric gear provided inside the bearing housing engages with the output gear of the motor and is eccentrically provided on the bearing housing, the bearing housing swivels around the output gear of the motor and the belt rotates. Although the tension of the eccentric gear can be adjusted, the eccentric gear engages with the output gear and turns, so that there is no problem in the power transmission function by gear meshing.

Therefore, when performing maintenance such as cleaning, the tension of the belt from the motor side to the drive roller can be freely adjusted as desired, and further, maintenance and inspection maintenance such as cleaning of the eccentric gear and output gear by removing the bearing housing from the frame. It has an excellent effect that the maintenance of the motor, the load cell and the like in the housing can be performed reliably depending on the design.

Moreover, since the bearing housing can pivot about the output gear with respect to the frame, the mounting on the frame and the housing can be done by simply pivoting, and it is easy to disassemble and reassemble. There is an advantage that tension can be applied to the belt.

Therefore, even when performing maintenance such as cleaning on the device, no skill is required for disassembly and reassembly,
Further, there is an excellent effect that it can be designed to be easily disassembled and assembled.

[Brief description of drawings]

1 to 14 are explanatory views of an embodiment of the invention of this application, FIG. 1 is an enlarged partial sectional side view of a main part of a weight determination device main body, and FIG. 2 is a perspective view of a flat belt loosening mechanism. 3 is a plan view of the same, FIG. 4 is a partial cross-sectional view of the weight determination device main body, FIG.
Figure is a plan view of the flat belt tensioned state, Figure 6 is a plan view of the flat belt removed state, and Figure 7 is a partial sectional view of the ball bearing.
FIG. 8 is a schematic side view of the detachable state of the subframe, 9 to 1
FIG. 4 is an explanatory view of the bearing housing, FIG. 9 is an overall schematic side view, FIG. 10 is a longitudinal sectional view of the same, FIG. 11 is a right half view of the same, FIG. 12 is a left half view of the same, and FIG. 13 is a gear. FIG. 14 is a front view of an output gear, an eccentric gear, and a bearing housing, and FIG. 15 is a perspective view of a general-purpose product weight determination device. 34 …… Weight detection device, 12 …… frame, 16 …… subframe, 13,14 …… flat belt, 17 …… driving roller, 22 …… driven roller, 32 …… motor, 42 …… bearing housing, 46 ...... Eccentric gear, 45 …… Output gear

Claims (4)

[Scope of utility model registration request] 1. A driving roller and a driven roller each having a flat belt stretched on a subframe detachably mounted on a frame having a weight detection device, and the driven roller is pivotally linked to the motor provided on the frame. In a weight determination device for a commercial product, a bearing housing is provided with respect to the frame, the installation posture angle of which can be adjusted around the output gear of a motor provided in the frame, and the mounting and dismounting of the bearing housing. An eccentric gear housed in the housing is provided so as to mesh with an output gear of the motor so as to be rotatable about the output gear, and has a pulley coaxial with the pulley of the drive roller coaxially with the eccentric gear. A product weight determination device characterized by the above. 2. A weight determination device for a commodity according to claim 1, wherein the pulley is a timing pulley. 3. The weight determination device for a commodity according to claim 1, wherein the bearing housing is attached to the frame by an arcuate long groove and a bolt. 4. A weight determination device for a commodity according to claim 1, wherein the bearing housing and the frame are engaged with each other through a spigot portion.