JPH0752115B2 - Belt conveyor type automatic weighing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, for example, in a confectionery manufacturing factory or the like, when sorting objects to be weighed, such as weighing and packaging products, which are weighed and packaged in advance to a predetermined weight, the objects to be weighed are belted. The weight is measured while it is placed on a conveyor and conveyed, and it is judged whether or not the measured weight is within the allowable range of the set weight, and based on the judgment result, the appropriate product and the non-appropriate product in the next process. The present invention relates to a belt-conveyor-type automatic weighing device used when sorting and.

[0002]

2. Description of the Related Art A belt conveyor type automatic weighing device of this type is generally used in a mode as shown in FIG.
In FIG. 10, reference numeral 2 denotes a belt conveyor that carries out a weighing and packaging product 7 (hereinafter, referred to as a product), which is an object to be weighed, from a product packaging unit, and a product intake belt conveyor device 3 is connected to a subsequent stage thereof. A sorting belt conveyor 4 sends out the weighed products 7, and has a pop-out device (not shown) for popping out and removing the products 7 whose measured weight is out of the allowable range of the set weight. A belt conveyor-type automatic weighing device 5 is arranged between the sorting belt conveyor 4 and the product-taking belt conveyor device 3, and the belt-conveyor-type automatic weighing device 5 and the product-taking belt in the preceding stage thereof. The conveyor device 3 and the fixed base 6 are arranged in tandem so that the products 7 are placed on the conveyor belts 13 and 14 and continuously conveyed, and the weight is instantaneously measured by a weight detector such as a load cell described later. A weight determination device 1 for quantitatively measuring is configured. A display device 8 for displaying the weight detected by the weight detector 34 and the excess or deficiency of the weight is provided on the side of the weight determination device 1.

FIG. 11 is a diagram schematically showing the structure of the belt conveyor type automatic weighing device 5 in the above-described weight determination device 1. In FIG. 11, reference numeral 12 is a subframe, which is provided at both front and rear ends of the subframe 12. Drive roller 1 supported by a shaft
The conveyor belt 14 is stretched between 0 and the driven roller 11. A housing 31 having a downward opening is fixed to a frame 9 erected on the fixed base 6, one end of the weight detector 34 is fixed in the housing 31 in a cantilever manner, and the subframe 12 is fixed to the subframe 12. The other end of the weight detector 34 is fixedly supported by a bracket 50 that is continuously provided and extends in an underhang shape with respect to the housing 31. A drive motor 32 is attached to a subframe extension 12a which is fixed to the front end of the subframe 12 and vertically extends downward. The drive motor 32 and the conveyor belt 14 are attached.
The drive roller 10 of FIG. In FIG. 11, 41 is the housing 31.
Is a diaphragm that seals the lower end opening of the.

[0004]

By the way, as the objects to be weighed by the belt conveyor type automatic weighing device of this kind, there are many foods such as confectionery. Therefore, in addition to maintaining the function of the device in a stable state and maintaining good hygiene, various maintenance such as washing such as washing with water, inspection and maintenance, and repair can be performed easily on a regular or irregular basis. In addition, it is required to be able to perform well.

However, in the conventional belt conveyor type automatic weighing apparatus having the above-mentioned structure, the conveyor belt 14 for conveying the objects to be weighed and the driving motor 32 thereof.
Are attached to the sub-frame 12 side, and the sub-frame 12 is fixedly supported by the weight detector 34 on the frame 9 side via the underhang-shaped bracket 50. When the frame 9 is configured to be detachable so that maintenance can be performed for each mechanism, not only the structure becomes very complicated, but also its attachment and detachment become difficult. Further, in order to surely and efficiently clean the entire device by using a shower ring of cleaning water, the drive motor 32 mounted on the subframe 12 side is housed in the housing 31. It is necessary to waterproof the weight detector 34 separately from the existing weight detector 34, and if such another waterproof structure is adopted, the structure becomes more complicated and the cost increases.

On the other hand, when the waterproof structure is omitted, the power supply connector of the motor, which causes electric troubles due to water intrusion, is exposed. Therefore, during cleaning for hygienic management of the entire apparatus, the frame 9 side performs showering of washing water, and the sub-frame 12 equipped with the motor 32 is used.
There is a problem that it is necessary to perform partially different cleaning such as wiping on the side, which makes maintenance work complicated and inefficient. Incidentally, Japanese Utility Model Laid-Open No. 56-133523 discloses a structure for preventing water drops dripping from a conveyor belt from entering the housing for accommodating the weight detector. Since the opening is not sealed, it is not suitable for waterproofing during cleaning.

The present invention has been made in view of the above-mentioned circumstances, and has a simple structure so that the sub-frame side can be easily disassembled and assembled with respect to the frame, and maintenance such as cleaning of each mechanism is performed. An object of the present invention is to provide a belt conveyor type automatic weighing device that can be reliably and efficiently performed and that can secure the waterproof performance for the weight detector and the motor with a simple configuration.

[0008]

In order to achieve the above object, a belt conveyor type automatic weighing apparatus according to claim 1 of the present invention comprises a driving roller and a driven roller on which a conveyor belt for conveying an object to be weighed is stretched. A sub-frame supporting a roller is detachably attached to a frame provided with a motor for driving the conveyor belt and a weight detector, and a belt for interlocking the driving motor with the driving roller of the conveyor belt. A belt conveyor type automatic weighing device which is interlocked with each other, wherein a housing having a downward opening is fixed to the frame, and a supporting bracket extending upward from a fixed base is inserted into the housing, and the supporting bracket is One end of the weight detector is fixed to the insertion part of the housing into the housing, and the other end of the weight detector is raised. The housing is fixed to a housing, the drive motor is mounted in the housing, and a rotating shaft driven by the drive motor protrudes laterally from the housing via a watertight structure, and the protruding end portion and the The interlocking belt is stretched between the conveyor belt and the drive roller.

Further, in the belt conveyor type automatic weighing apparatus according to the second aspect of the present invention, a waterproof diaphragm is interposed between the peripheral portion of the lower end opening of the housing and the support bracket, and the diaphragm is used for the above-mentioned operation. The lower end opening of the housing is sealed.

Further, in the belt conveyor type automatic weighing device according to a third aspect of the present invention, a sub-housing which forms the watertight structure with the drive shaft of the drive motor as an axis is provided on one side of the housing. , The turning position around its axis is fixed so that it can be adjusted, and the rotary shaft is rotatably supported in the sub-housing in a state of being eccentric with respect to the axis, and the protruding end of the rotary shaft is And the drive belt of the conveyor belt, the interlocking belt is stretched, and the inner end of the rotary shaft and the drive shaft of the drive motor are interlocked via a gear to provide the sub-housing. The tension of the interlocking belt can be adjusted by adjusting the turning position around the axis of the.

[0011]

According to the present invention, the weight of the object to be weighed is detected while the object to be weighed placed on the conveyor belt stretched on the sub-frame side is conveyed by driving the conveyor belt. Immediately measured by the instrument,
It is determined whether the measured weight is within the allowable range of the set weight. Then, based on the determination result, appropriate products and non-appropriate products are sorted in the next step.

According to the first aspect of the present invention, the weight detector and the conveyor belt drive motor are housed in the housing having a downward opening fixed to the frame side. The container can be waterproofed and dustproofed with a single housing, and a waterproof and dustproof structure for maintaining the functions of this type of device in a stable state can be configured easily and inexpensively.

Further, the motor for driving the conveyor belt is mounted not on the sub-frame side but on the frame side and is housed in the housing, and one end of the weight detector is fixed to a support bracket extending from the fixed base. With the weight detector supporting structure, the sub-frame side has a simple structure and is light in weight, and mounting / removing with respect to the frame is structurally and easily performed. Therefore, for various types of maintenance, the sub-frame side can be easily removed from the frame side and disassembled to facilitate maintenance of the mechanical parts. In particular, waterproof performance for the weight detector and the motor, which is also the heart of the device, can be achieved. Therefore, the entire area of the apparatus can be reliably and efficiently washed with only the shower ring to maintain good hygiene.

According to the second aspect of the invention, due to the sealing action of the diaphragm, the inside of the housing is waterproofed,
The dustproof performance is enhanced. In particular, it is possible to reliably prevent the wash water splashing from the fixed base side during the shower ring from entering the housing.

Further, according to the third aspect of the invention, the sub-housings connected to the side portions of the housing are fixed by rotating the sub-housings around their axes to adjust their positions and then fixing them. It is possible to arbitrarily adjust the tension of the belt for linking the drive roller of the conveyor belt for use with the drive motor.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway side view showing a weight determination device including a belt conveyor type automatic weighing device of the present invention and a belt conveyor device for taking in products arranged in a preceding stage thereof, and FIG. 2 is a plan view thereof. . In FIG.
0 and the same components as those shown in FIG.
The same reference numerals are given and detailed description thereof is omitted.

As shown in FIGS. 1 and 2, the belt conveyor device 3 for taking in the product and the belt conveyor type automatic weighing device 5 at the subsequent stage are arranged on the fixed base 6 in tandem. The end portion of the conveyor belt 13 of the take-in belt conveyor device 3 and the start end portion of the conveyor belt 14 of the belt conveyor type automatic weighing device 5 are installed with a slight gap therebetween, and the product 7 as the object to be weighed.
Is placed on the conveyor belts 13 and 14 and continuously conveyed, and the weight is instantaneously measured by a weight detector 34 such as a load cell provided only on the belt conveyor type automatic measuring device 5 side. is doing.

The above-mentioned belt conveyor device 3 for taking in goods and the belt conveyor type automatic weighing device 5 have substantially the same configuration except that the belt conveyor type automatic weighing device 5 side is provided with a weight detector 34. Therefore, the configuration on the side of the belt conveyor type automatic weighing device 5 will be described below.
The sub-frame 12 of the belt conveyor automatic weighing device 5 has a top plate 15, and the conveyor is provided between a driven roller 11 and a drive roller 10 which are axially supported at both front and rear ends of the sub-frame 12. The belt 14 is stretched. The lower surface of the upper portion of the conveyor belt 14 is in sliding contact with the upper surface of the top plate 15.

One end of the shaft 11A of the driven roller 11 is attached to the tip of the rod 27R of the displacement mechanism 19 which is slidable in the front-rear direction along the support bracket 18R provided on one side of the front end of the subframe 12. The other end of the shaft 11A is rotatably supported via a bearing 20, and the other end of the shaft 11A is slidable in the front-rear direction along a support bracket 18L provided on the other side of the front end of the sub-frame 12 in the front-rear direction. Is rotatably supported on the tip of the roller through a ball bearing 21 (FIG. 5) and is rotatable along a horizontal plane.

Further, a pair of parallel bar-shaped support pins 23F and 23R which are parallel to each other are provided in the front and rear portions of the sub-frame 12 at a predetermined distance from each other, and the drive roller is also provided. A timing pulley 24 for winding a timing belt 49 for interlocking, which will be described later, is fixed to one end of the shaft 10A of the shaft 10.

On the other hand, on the upper surface of the frame 9 in the belt conveyor type automatic weighing device 5, a pair of fork-shaped hooks 25F, 25R are provided at the front and rear in correspondence with the pair of support pins 23F, 23R on the subframe 12 side. The front hook 25F is formed to project upward, and the front hook 25F is formed with a hook groove 26F that opens upward, and the rear hook 25R is formed with a hook groove 26R that opens obliquely forward and upward. By engaging and disengaging the support pins 23F and 23R on the side of the subframe 12 with respect to 26F and 26R, the subframe 12 is configured to be attachable to and detachable from the frame 9, and in the attached state, all of the subframe 12 is attached. Weight hook 2
5F and 25R are designed to be supported.

According to the above construction, when the sub-frame 12 is attached to the frame 9 side, as shown in FIG. 8, the rear support pin 23R is attached to the diagonal hook groove 26R of the hook 25R.
After being inserted into and engaged with the sub-frame 12, the sub-frame 12 is pivoted downward about the rear support pin 23R to move the front support pin 2
The 3F can be easily attached by dropping it into the hook groove 26F of the hook 25F and engaging it. When the sub-frame 12 is detached from the frame 9, the hook 25R on the rear portion is reversed, contrary to the above-mentioned attachment.
Rear support pin 23 engaged with the hook groove 26R of
The sub-frame 12 is pivoted upward in the direction of the arrow y around the R to disengage the front support pin 23F from the hook groove 26F of the hook 25F, and then the rear support pin 23R is slanted into the hook groove 25R. It can be easily removed by pulling it out in the direction of arrow x and moving it.

FIG. 3 is a perspective view of an essential part showing a specific structure of the displacement mechanism 19, and a rod for rotatably supporting one end of the shaft 11A of the driven roller 11 of FIG. A slider 28 having a rectangular cross section shown in FIG. 3 is integrally connected to the rear end of 27R, and the slider 28 has a U-shaped cross section and has a guide function.
It is fitted so as to be slidable in the front-back direction along. A well-known toggle type squeeze hook 29 is provided between the slider 28 and the sub-frame 12. When the squeeze hook 29 is closed, the driven roller 11 shown in FIG. Then
During the opening operation, the driven roller 11 is retracted to release the tension of the conveyor belt 14,
Can be laterally removed from the driven roller 11 and the driving roller 10. When removing the conveyor belt 14, the conveyor belt 14 does not interfere with the hooks 25F and 25R because the subframe 12 is removed from the hooks 25F and 25R.

As shown in FIGS. 1 and 4, a housing 31 having a downward opening whose left side surface is sealed by a lid 51 is provided at the front and rear central portions of the frame 9 via bolts 30. It is fixed. A support bracket 35 extending upward from the fixed base 6 is inserted at a position close to one side in the housing 31, and bolts 36, 36 are inserted in the insertion portion of the support bracket 35 into the housing 31. One end of the weight detector 34 is fixed in a cantilever manner. The other end of the weight detector 34 is fixed to the rear side surface of the housing 31 via bolts 33, 33. Thereby, the weight detector 3
Reference numeral 4 supports the total weight of the automatic weighing device 5 excluding the support bracket 35 as the tare weight, and measures the increase in the weight of the product 7 placed and conveyed on the conveyor belt 14 and illustrated. It is designed to be input to the omitted microcomputer.

A conveyor belt driving motor 32 shown in FIG. 4 is provided beside the weight detector 34 in the housing 31.
Is mounted, and the motor 32 and the weight detector 34 have a waterproof and dustproof structure, which is the one housing 3 described above.
It is composed of 1. As shown in FIGS. 2 and 4, the side portion of the housing 31 has the motor 3
A sub-housing 42 forming a water-tight structure concentric with the drive shaft of No. 2 is continuously provided in a water-tight manner via a spigot portion 43 and a seal 44, and the sub-housing 42 includes an annular pressing plate 60 and a bolt. The turning position around the axis s can be adjusted via 61.

Further, in the sub-housing 42, a rotating shaft 62 is eccentrically arranged with respect to the shaft center s, and a rotating shaft 62 is provided in the bearing 4
It is rotatably supported via the rotary shaft 62.
And the motor 32 are interlocked with each other by the engagement of the spur gear 46 fixed to the inner end of the rotating shaft 62 and the pinion gear 45, and the other end of the rotating shaft 62 is located outside the sub-housing 42. A timing pulley 48 that is projected and is fixed to the protruding end portion, and a timing pulley 2 that is fixed to the drive roller shaft 10A of the conveyor belt 14.
4, the interlocking timing belt 49 is stretched. With the above configuration, the sub housing 4
While the second-side spur gear 46 is meshed with the pinion gear 45, the sub-housing 42 is swiveled around its axis s to adjust its position and then fixed, thereby adjusting the tension of the interlocking timing belt 49. It is configured to be possible.

Further, a stopper 37 is fixed to the support bracket 35 by a bolt 38 along a guide groove (not shown) so as to be slidable up and down by a small distance and the mounting position can be adjusted.
A stopper 39 having a U-shaped cross section shown in FIG. 1 is provided on the side. By adjusting the upper and lower mounting positions of the stopper 37 with the adjusting screw 40 shown in FIG.
9 are brought into contact with each other to stop the over-vibration of the weight detector 34.

Further, a waterproof diaphragm 41 is interposed between the periphery of the lower end opening of the housing 31 and the support bracket 35 in a watertight manner, and the diaphragm 41 allows the lower end opening of the housing 31 to be opened. The part is sealed.

The configuration on the side of the belt conveyor device 3 for taking in goods shown in FIG. 1 is obtained by omitting the weight detector 34 from the configuration of the belt conveyor type automatic weighing device 5 described above.
Since the other configurations are completely the same, the reference numerals of the corresponding constituent elements with the branch reference code b added thereto are attached, and detailed description thereof will be omitted. However, although a motor for driving the conveyor belt 13 is also provided, it is not shown in the drawing.

FIG. 9 is a diagram schematically showing the configuration of the above-mentioned belt conveyor type automatic weighing device 5 in correspondence with the schematic diagram of the configuration of the conventional belt conveyor type automatic weighing device 5 shown in FIG. However, it does not exactly match FIGS. 1, 2 and 4.

Next, the operation of the weight determination device 1 having the above configuration will be described. Basically, similarly to the conventional weight determination device 1 shown in FIG. 10, the products 7 sent through the preceding combination weighing process and packaging process are transferred from the conveyor belt 13 of the intake conveyor device 3 to the belt conveyor type. The baton is touched on the conveyor belt 14 of the automatic weighing device 5. When the product 7 is placed on the conveyor belt 14 and conveyed, the weight of the product 7 is provided in a cantilever manner via the support bracket 35 extending upward from the fixed base 6 in FIG. The weight is measured by the weight detector 34, and the measured weight is input to a microcomputer (not shown) as an increase in the tare weight, and the actual weight of the product 7 obtained by subtracting the tare weight from the total weight is a preset weight value. It is determined whether it is within the allowable range. The determination result is displayed on the display device 8 of FIG. 10 and is output to the sorting conveyor 4 side in the subsequent stage and, out of the products 7 conveyed by the sorting conveyor 4, a product outside the allowable range of the set weight. 7 is pushed out to the side of the route and removed.

By the way, when the above-mentioned product 7 is a food product or the like, in order to stably maintain the function of the device itself and hygienic management, the take-in conveyor device 3 of the weight determination device 1 is regularly or irregularly. Also, it is necessary to disassemble the belt conveyor type automatic weighing device 5 and perform maintenance such as cleaning. Hereinafter, a work procedure for maintenance of the belt conveyor automatic weighing device 5 will be described, but the maintenance of the take-in conveyor device 3 side is also substantially the same.

First, the operation of the motor 32 shown in FIG. 9 is stopped, and the front portion of the sub-frame 12 is indicated by the alternate long and short dash line in FIG. 8 centering on the support pin 23R engaged with the hook groove 26R of the rear hook 25R. As shown, lightly lift upward in the direction of the arrow y to attach the front support pin 23F to the hook 25F.
Of the hook groove 26F. At this time, since the timing pulley 24 fixed to the shaft 10A of the drive roller 10 moves obliquely downward, it is stretched between the timing pulley 24 and the timing pulley 48 fixed to the rotary shaft 62 on the sub housing 42 side. The interlocking timing belt 49 is in a loosened state, and the timing belt 49 can be easily removed from the timing pulley 24 of the drive roller 10.

Then, as shown by the chain double-dashed line in FIG. 8, when the rear portion of the sub-frame 12 is pulled out obliquely upward in the arrow x direction, the support pin 23R at the rear portion is disengaged from the diagonal hook groove 26R of the hook 25R. Therefore, the conveyor belt 1
4, the sub-frame 12 still equipped with the driving roller 10 and the driven roller 11 can be separated from the frame 9 side and directly subjected to predetermined cleaning or the like.

Further, as described above, when the conveyor belt 14 is removed from the subframe 12 separated from the frame 9 side for cleaning or the like, the squeeze hook 29 of the displacement mechanism 19 at the front portion of the subframe 12 is used as shown in FIG. As shown in, by turning to the rear (right side of FIG. 3),
The slider 28 moves backward and the rod 27R moves backward together with the bearing 21. As a result, due to the presence of the ball bearing 21 at one end of the driven roller 11 as shown in FIG. 5, the ball bearing 2 is moved from the state shown in FIG. 6 to the ball bearing 2 shown in FIG.
The other end portion side pivots rearward around the one side, so that the conveyor belt 14 becomes loose between the drive roller 10 and the driven roller 11, and as shown by the arrow in FIG.
The conveyor belt 14 is driven by a driving roller 10 and a driven roller 1.
It can be removed from 1 to the side.

In the process of removing the conveyor belt 14 as described above, the sub-frame 12 is already removed from the hooks 25F and 25R as described above, so that the conveyor belt 14 interferes with the hooks 25F and 25R. It can be smoothly removed to the side without any trouble, and can be immediately subjected to predetermined cleaning or the like by a shower ring or the like, and the predetermined cleaning or the like of the drive roller 10, the driven roller 11 and the sub-frame 12 can be easily performed. Can be done.

On the other hand, the conveyor belt 14 and the driving roller 1
0 and the driven roller 11 together with the sub-frame 12 are removed from the main body side frame 12 of FIG.
The sub-housing 42 and the like can be washed without leaving every corner in detail. At this time, as described above, the heart parts such as the weight detector 34 and the motor 32 include the housing 31, the sub-housing 42, and the diaphragm. Because it is completely waterproof structure by 41,
No washing water or dust adheres to the motor 32 and the weight detector 34 at all. Further, even if water is intruded from a minute gap, the watertight structure of the motor 32 and the weight detector 34, which has been already developed, causes
Their functions are not impaired.

After the predetermined maintenance such as cleaning is completed in this way, the assembled product 7 is again used for measuring the weight of the product 7. After the assembly, the tension of the interlocking timing belt 49 is adjusted. When it becomes necessary to loosen the bolts 61, 61 of FIG. 4, the sub-housing 42 is first fixed to the housing 31 via the spigot 43 and the annular pressing plate 60 by a predetermined amount around its axis s. By rotating only the rotation axis 62, the rotary shaft 62 revolves around the axis s and is displaced.
The tension of 9 is adjusted. When adjusting the tension as described above, the gear 46 in the sub housing 42 is
To rotate about the axis s while being engaged with the pinion gear 45 of the motor 32.
The meshing relationship of No. 5 does not cause any trouble.

After the tension is adjusted to the desired value, the bolts 61, 61 are tightened again to fix the sub-housing 42 to the housing 31, and the timing belt 49
Between the timing pulley 48 on the sub housing 42 side and the timing pulley 24 on the sub frame 12 side in a free state. From this state, by performing the operation opposite to the operation shown in FIG.
3R is inserted into the diagonal hook groove 26R of the rear hook 25R from diagonally above and engaged therewith.

Subsequently, when the front portion of the sub-frame 12 is swung downward around the rear support pin 23R engaged with the diagonal hook groove 26R of the rear hook 25R,
The front support pin 23F is inserted and engaged with the hook groove 26F of the front hook 25F, and the sub-frame 12 side is assembled to the frame 9 side in a predetermined manner. At the same time, the driving roller 10 is pivoted obliquely upward around the rear hook groove 26R and set in a predetermined position, whereby the timing pulley 24 and the sub-housing 4 are set.
A predetermined tension is applied to the timing belt 49 that is stretched between the timing belt 48 on the second side.

After this assembly, with the squeeze hook 29 of the displacement mechanism 19 still open, the conveyor belt 14 is moved laterally with respect to the drive roller 10 and the driven roller 11 as opposed to the arrow shown in FIG. From the inside to the free position and hang it over a predetermined position, and then the squeeze hook 29 of the displacement mechanism 19 is turned to the front side to displace the displacement mechanism 1.
By closing 9, the slider 28 of FIG. 3 advances, the bearing 21 of FIG. 7 returns to the initial position and attitude via the rod 27R, and the conveyor belt 14 is driven by the drive roller 10 and the driven roller 10 as shown in FIG. The rollers 11 are stretched in a state where a predetermined tension is applied.

As described above, all the mechanical parts can be arbitrarily disassembled and assembled. Therefore, in the normally assembled state, the parts can be easily and reliably maintained by exposing them by disassembling the parts that cannot be reached by other mechanisms or parts. In addition, an efficient cleaning means such as a shower ring can thoroughly clean the whole body and manage it sanitarily. As described above, the take-in conveyor device 3 can be easily maintained by the work of the same procedure as above.

The structure for attaching / removing the sub-frame 12 to / from the frame 9 is not limited to that of the above embodiment.

[0044]

As described above, according to the first aspect of the invention, the weight detector and the conveyor belt driving motor, which are the most important in terms of the function of this type of device, are fixed to the frame side. These weight detectors and motors can be waterproofed and dustproofed by using only one housing. The structure for maintaining the function of the device in a stable state can be configured easily and inexpensively, and the entire device can be made lightweight.

Moreover, the conveyor belt driving motor is mounted not on the sub-frame side but on the frame side, and the weight detector is supported by a support bracket extending from the fixed base at one end and the other end at the other end. By adopting the structure of fixing to the housing respectively, the structure of the sub-frame side can be made simple and lightweight, and the attachment and detachment with respect to the frame can be made easy both structurally and in terms of work. At the time of maintenance, the sub-frame side can be easily removed from the frame side and disassembled, so that maintenance of each mechanism can be performed easily. In particular, the weight detector and the motor, which should be called the heart of the device, have excellent waterproof performance, so the entire area of the device can be reliably and efficiently washed with only the shower ring to maintain good hygiene. , It can be effectively used as a weighing device for food and the like.

According to the second aspect of the invention, the sealing action of the diaphragm makes the housing waterproof.
The dustproof performance can be improved and the functions of the weight detector and motor can be maintained satisfactorily for a long period of time.In particular, it is possible to reliably prevent wash water splashing from the fixed base side from entering the housing during showering. it can.

Further, according to the third aspect of the present invention, the sub-housings connected to the side portions of the housing are fixed by rotating the sub-housings around their axes to adjust their positions and then fixing them. The belt tension for linking the drive roller of the conveyor belt for driving and the drive motor can be adjusted arbitrarily, and there is no need to provide a separate mechanism for tension adjustment, making the overall structure simpler and less expensive. Can be configured to.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a weight determination device including a belt conveyor type automatic weighing device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partially cutaway perspective view showing a detailed configuration of a displacement mechanism.

FIG. 4 is a vertical sectional front view of a belt conveyor type automatic weighing device.

FIG. 5 is a partial cross-sectional view of a ball bearing.

FIG. 6 is a schematic plan view showing a stretched state of a conveyor belt.

FIG. 7 is a schematic plan view showing a detached state of the conveyor belt.

FIG. 8 is a schematic side view of a main part for explaining a mounting / removing state of a subframe.

FIG. 9 is a schematic diagram showing a schematic configuration of a belt conveyor type automatic weighing device.

FIG. 10 is an overall external perspective view showing a weight determination device including a conventional belt conveyor type automatic weighing device.

FIG. 11 is a schematic diagram showing a schematic configuration of the belt conveyor type automatic weighing device of FIG. 11.

[Explanation of symbols]

5 ... Belt conveyor type automatic weighing device, 6 ... Fixed base,
7 ... Merchandise (object to be weighed), 9 ... Frame, 10 ... Drive roller, 11 ... Followed roller, 12 ... Subframe, 14 ... Conveyor belt, 31 ... Housing with downward opening, 32 ...
Conveyor belt drive motor, 35 ... Support bracket,
41 ... diaphragm, 42 ... sub-housing (watertight structure), 45, 46 ... gear, 49 ... interlocking timing belt, 62 ... rotary shaft.

Claims (3)

[Claims] 1. A sub-frame supporting a drive roller and a driven roller, on which a conveyor belt for conveying an object to be weighed is stretched, with respect to a frame provided with a motor for driving the conveyor belt and a weight detector. A belt conveyor type automatic weighing device which is detachably mounted, wherein the drive motor and the drive roller of the conveyor belt are interlocked via an interlocking belt, and a housing having a downward opening is fixed to the frame, A support bracket extending upward from the fixed base is inserted into the housing, and one end of the weight detector is fixed to the insertion portion of the support bracket into the housing, and the other end of the weight detector is fixed. Is fixed to the housing, the drive motor is mounted in the housing, and is driven by the drive motor. A belt conveyor characterized in that a rotating shaft protruding laterally from the housing through a watertight structure, and the interlocking belt is stretched between the projecting end and the driving roller of the conveyor belt. Automatic metering device. 2. A waterproofing diaphragm is interposed between a peripheral portion of the lower end opening of the housing and the support bracket, and the lower end opening of the housing is sealed by the diaphragm. 1. The belt conveyor type automatic weighing device according to 1. 3. A sub-housing, which forms the watertight structure with the drive shaft of the drive motor as an axis, is fixed to one side of the housing so that the turning position around the axis is adjustable. The rotary shaft is rotatably supported in the sub-housing in a state of being eccentric with respect to the shaft center, and the interlocking member is provided between the protruding end of the rotary shaft and the drive roller of the conveyor belt. While stretching the belt,
The tension of the interlocking belt can be adjusted by interlocking the inner end of the rotary shaft with the drive shaft of the drive motor via a gear to adjust the turning position around the axis of the sub-housing. Claim 1 or 2 comprised in
Belt conveyor type automatic weighing device described in.