JPH0573537U - Belt conveyor type automatic weighing device - Google Patents

Abstract

(57) [Summary] [Purpose] The structure of the sub-frame side with the conveyor belt is simplified to facilitate removal from the frame, and the conveyor belt can also be easily removed from the sub-frame for reliable cleaning and maintenance. And make it easy. A sub-frame 12 having a conveyor belt 14 for conveyance is detachably mounted on a frame 9, while a driven roller 11 of the conveyor belt 14 is rotatable in a horizontal plane about one end side in the axial direction thereof. A displacement mechanism 19 is provided that displaces the other end of the axial direction with respect to the subframe 12 along the longitudinal direction of the conveyor belt. Further, the displacement mechanism 19 is provided with a toggle type hook 29 which can be switched between a tensioned posture for applying a predetermined tension to the conveyor belt 14 and a loosening posture for loosening the tension. The conveyor belt 14 can be easily removed and attached to the sub-frame 12 only by the attitude switching operation of the toggle hook 29.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention, for example, in a confectionery manufacturing factory, when sorting objects to be weighed such as weighing and packaging products that are weighed and packaged in advance to a predetermined weight, the objects to be weighed are placed on a belt conveyor and conveyed. While measuring the weight, it is determined whether the measured weight is within the allowable range of the set weight, and based on the result of the determination, proper products and improper products are sorted in the next process. The present invention relates to a belt conveyor type automatic weighing device used in any case.

[0002]

[Prior Art]

 This type of belt conveyor type automatic weighing device is generally used in a mode as shown in FIG. In FIG. 9, reference numeral 2 denotes a belt conveyor that carries out a weighing-packaged product 7 (hereinafter, referred to as a product), which is an object to be weighed, from the product packaging unit, and a product-taking belt conveyor device 3 is connected to the subsequent stage thereof. Reference numeral 4 denotes a sorting belt conveyor that sends out the weighed products 7. The sorting belt conveyor 4 has a pop-out device (not shown) that pops out and removes 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. The conveyor device 3 and the fixed base 6 are arranged in tandem, and the products 7 are placed on the conveyor belts 13 and 14 and continuously conveyed, while 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. 10 is a diagram schematically showing the configuration of the belt conveyor type automatic weighing device 5 in the weight determination device 1 described above. In FIG. 10, reference numeral 12 is a subframe, and the front and rear end portions of the subframe 12 are provided. The conveyor belt 14 is stretched between the driving roller 10 and the driven roller 11 which are axially supported. A housing 31 having a downward opening is fixed to a frame 9 erected on the fixed base 6, and one end of the weight detector 34 is fixed in the housing 31 in a cantilever manner. The other end of the weight detector 34 is fixedly supported by a bracket 50 that is continuously provided to extend 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 hangs downward. The drive motor 32 and the drive roller 10 of the conveyor belt 14 are connected to the belt 49. Are linked through. In FIG. 12, reference numeral 41 is a diaphragm for sealing the lower end opening of the housing 31.

[0004]

[Problems to be solved by the device]

 By the way, many food items such as confectionery are the objects to be weighed by this type of belt conveyor type automatic weighing device. For this reason, in addition to maintaining the equipment's functions in a stable state and maintaining good hygiene, various maintenance such as washing, inspection and maintenance, repair such as regular or irregular washing with water is performed. Is required to be carried out easily and satisfactorily.

However, in the conventional belt conveyor type automatic weighing device having the above-described configuration, the conveyor belt 14 for conveying the objects to be weighed and the driving motor 32 for the conveyor belt 14 are attached to the subframe 12 side together. In addition, since the subframe 12 is fixedly supported by the weight detector 34 on the frame 9 side through the underhang-shaped bracket 50, the subframe 12 side can be removed from the frame 9 side. If it is configured in such a way that cleaning and maintenance can be performed for each mechanism, not only the structure will be very complicated, but also its attachment and detachment will be difficult. Also on the subframe 12 side, it is desirable that the conveyor belt 14 can be separated from the subframe 12 in terms of cleaning and maintenance. However, in the conventional device, such a separate assembly type is not used. It was difficult to carry out maintenance and cleaning such as repairing the back side of the conveyor belt 14 and the portion of the subframe 12 surrounded by the conveyor belt 14.

The present invention has been made in view of the above circumstances, and has a simple structure, but facilitates attachment / detachment of the subframe to / from the frame and separation / assembly of the conveyor belt from / to the subframe. A belt that can reliably and efficiently perform cleaning and maintenance for each mechanism part, and that can give a predetermined tension to the conveyor belt in an assembled state by a very simple operation. It is an object of the present invention to provide a conveyor type automatic weighing device.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the belt conveyor type automatic weighing apparatus according to the present invention comprises a subframe supporting a driving roller and a driven roller on which a conveyor belt for conveying an object to be weighed is stretched. A belt conveyor automatic weighing system that is detachably attached to a frame equipped with a drive motor and a weight detector, and the drive motor and the drive roller of the conveyor belt are interlocked via an interlocking belt. The device is configured so that at least one of the drive roller and the driven roller of the conveyor belt can be swung in a horizontal plane about one end side in the axial direction and the other end in the axial direction. Side with respect to the subframe along the tensioning direction of the conveyor belt and away from the other roller and the other roller. A displacement mechanism for displacing the roller in a loosening direction is provided, and this displacement mechanism includes a tensioning posture that applies a predetermined tension to the conveyor belt by the displacement of the other end of the roller in the tensioning direction, and the displacement of the roller. With this, a toggle type hook is provided that can be switched between two postures: loosening the conveyor belt tension so that the conveyor belt can be laterally removed from both rollers.

[0008]

[Action]

 According to this invention, in the process in which the object to be weighed placed on the conveyor belt stretched on the subframe side is conveyed by driving the conveyor belt, the weight of the object to be weighed is immediately detected by the weight detector. It is measured and 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 above configuration, since the weight detector and the conveyor belt driving motor are mounted on the frame side, not on the subframe side, the subframe side has a simple structure and is lightweight. It can be easily attached and detached to and from the structural and operational aspects, and cleaning and various maintenance can be performed easily.

Further, by operating a toggle type hook of a displacement mechanism provided on the sub-frame side, the other end side in the axial direction of at least one of the drive roller and the driven roller is stretched by the conveyor belt. Along with displacing along one direction and turning the other end in a horizontal plane around the one end, the tension of the conveyor belt is loosened and the roller is tilted with respect to the longitudinal direction of the conveyor belt. Can be changed to. As a result, it is easy to remove the conveyor belt from the subframe removed from the frame side, and cleaning and maintenance can be disassembled into smaller units and performed reliably and satisfactorily.

Further, after the conveyor belt is attached to the subframe from the side, the toggle type hook is simply switched to displace the roller and apply a predetermined tension to the conveyor belt. It is possible to stretch the conveyor belt between the rollers in a predetermined manner.

[0012]

【Example】

 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 the preceding stage, and FIG. 2 is a plan view thereof. is there. In the figure, the same components as those shown in FIGS. 9 and 10 are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 1 and 2, the belt conveyor device 3 for taking in products and the belt conveyor type automatic weighing device 5 at the subsequent stage are arranged on the fixed base 6 in a tandem manner, and The end of the conveyor belt 13 of the take-in belt conveyor device 3 and the start of the conveyor belt 14 of the belt conveyor type automatic weighing device 5 are placed opposite to each other with a slight gap, and the product 7 as the object to be weighed. While continuously transporting these on the conveyor belts 13 and 14, a weight detector 34 such as a load cell provided only on the belt conveyor type automatic weighing device 5 side measures the weight instantaneously. Is configured.

The product take-in belt conveyor device 3 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 belt conveyor type automatic weighing device 5 side will be described below. The subframe 12 of the belt conveyor type automatic weighing device 5 has a top plate 15, and the conveyor extends between a driven roller 11 and a driving roller 10 which are axially supported at both front and rear ends of the subframe 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 slidable in a tension direction (front and rear direction) of the conveyor belt 14 along a bracket 18L provided on one side of the front end of the subframe 12. It is rotatably supported by the tip of the rod 27L via a ball bearing 21 (FIG. 5) and is pivotable in a horizontal plane. On the other hand, on the bracket 18R provided on the other side of the front end portion of the subframe 12, a displacement mechanism 19 having a rod 27R slidable in the front-rear direction along the bracket 18R is mounted. The other end of the above is rotatably supported by the tip of the rod 27R via a bearing 20. By the operation of the displacement mechanism 19, the driven roller 11 pivots about one end and the other end in a horizontal plane.

A pair of bar-shaped support pins 23F and 23R which are parallel to each other are installed in the front-rear portion of the front and rear portions of the sub-frame 12 in the left-right width direction. A timing pulley 24 for winding an interlocking timing belt 49, which will be described later, is fixed to one end of the shaft 10A of the drive roller 10.

On the other hand, on the upper surface of the frame 9 of the belt conveyor automatic weighing device 5, a pair of fork-shaped hooks 25F and 25R are provided in front and rear in correspondence with the pair of support pins 23F and 23R on the side of the subframe 12. The front hook 25F has a hook groove 26F that opens upward, and the rear hook 25R has 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 the grooves 26F and 26R, the subframe 12 can be attached to and detached from the frame 9, and in the attached state, the subframe 12 The hooks 25F and 25R support the entire weight of the.

According to the above configuration, when the sub-frame 12 is attached to the frame 9 side, as shown in FIG. 8, after the rear support pin 23R is inserted into the diagonal hook groove 26R of the hook 25R and engaged, The sub-frame 12 can be easily attached by rotating the sub-frame 12 downward around the rear support pin 23R and inserting the front support pin 23F into the hook groove 26F of the hook 25F in a drop-down manner and engaging. Is. Further, when removing the sub-frame 12 from the frame 9, the sub-frame 12 is arrowed around the rear support pin 23R engaged with the hook groove 26R of the rear hook 25R, contrary to the above attachment. Pivot upward in the y direction to disengage the front support pin 23F from the hook groove 26F of the hook 25F, and then pull out the rear support pin 23R from the diagonal hook groove 26R of the hook 25R in the arrow x direction. By doing so, it can be easily removed.

FIG. 3 is a perspective view of a main part showing a specific configuration of the displacement mechanism 19, and the other end of the shaft 11 A of the driven roller 11 of FIG. 1 is rotatably supported via a bearing 20. A slider 28 having a rectangular cross section in FIG. 3 is integrally connected to the rear end of the rod 27R, and the slider 28 is slidably fitted in the front-rear direction along a bracket 18R having a U-shaped cross section and having a guide function. Has been done. A well-known toggle type squeeze hook 29 is provided between the slider 28 and the subframe 12, and the closing operation of the squeeze hook 29 drives the other end of the driven roller 11 in FIG. The conveyor belt 14 is moved forward in the tension direction so that the conveyor belt 14 is tensioned, and the squeeze hook 29 is opened to retract the other end of the driven roller 11 toward the drive roller 10 in a loosening direction. By doing so, the tension of the conveyor belt 14 is released, and the conveyor belt 14 is held in a loose posture so that the conveyor belt 14 can be laterally detached from the driven roller 11 and the drive roller 10. When removing the conveyor belt 14, the conveyor belt 14 does not interfere with the hooks 25F and 25R because the sub-frame 12 is removed from the hooks 25F and 25R.

Then, as shown in FIGS. 1 and 4, at the center of the front and rear of the frame 9, through the bolts 30, 30, the left side surface of the frame 9 is sealed with a lid 51. The ging 31 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 attached to the insertion portion of the support bracket 35 in the housing 31. The one end of the weight detector 34 is fixed via the cantilever system. The other end of the weight detector 34 is fixed to the rear side surface of the housing 31 via bolts 33, 33. As a result, the weight detector 34 supports the total weight of the automatic weighing device 5 excluding the support bracket 35 as the tare weight, and increases the weight of the product 7 placed on the conveyor belt 14 and conveyed. The minute is measured and input to a microcomputer computer (not shown).

A conveyor belt drive motor 32 shown in FIG. 4 is mounted on the side of the weight detector 34 in the housing 31, and a waterproof and dustproof structure for the motor 32 and the weight detector 34 is provided. It is composed of the one housing 31. 2 and 4, a sub-housing 42, which is concentric with the drive shaft of the motor 32, is connected to the lateral side of the housing 31 in a watertight manner via a spigot 43 and a seal 44. At the same time, the sub-housing 42 is configured such that the turning position around the axis s thereof can be adjusted via the annular pressing plate 60 and the bolt 61.

A rotating shaft 62 is rotatably supported in the sub-housing 42 via a bearing 47 so as to be eccentric with respect to the shaft center s. The rotating shaft 62 and the motor 32 are connected to each other. Are interlocked by the engagement of the spur gear 46 fixed to the inner end portion of the rotating shaft 62 and the pinion gear 45, and the other end portion of the rotating shaft 62 is projected to the outside of the sub housing 42. An interlocking timing belt 49 is stretched between the timing pulley 48 fixed to the projecting end and the timing pulley 24 fixed to the drive roller shaft 10A of the conveyor belt 14. With the above structure, the spur gear 46 on the side of the sub-housing 42 is engaged with the pinion gear 45 while the sub-housing 42 is rotated around the axis s of the sub-housing 42 to be adjusted in position and then fixed. The tension of the timing belt 49 is adjustable.

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. In addition, a stopper 39 having a U-shaped cross section shown in FIG. 1 is provided. By adjusting the upper and lower mounting positions of the stopper 37 with the adjusting screw 40 shown in FIG. 4, the stoppers 37 and 39 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 lowers the lower end of the housing 31. The opening is sealed.

The configuration on the side of the belt conveyor device 3 for taking in goods shown in FIG. 1 is the same as that of the above-mentioned belt conveyor type automatic weighing device 5 except that the weight detector 34 is omitted. Therefore, the reference numeral of the corresponding constituent element with the branch sign b added is given, and the detailed description thereof is omitted. However, although a motor for driving the conveyor belt 13 is also provided, it is not shown in the drawing.

Next, the operation of the weight determination device 1 having the above configuration will be described. Basically, similar to the conventional weight determination device 1 shown in FIG. 9, the product 7 sent through the combination weighing process in the preceding stage and the packaging process is transferred from the conveyor belt 13 of the intake conveyor device 3 to the belt conveyor. The conveyor belt 14 of the automatic metering device 5 is baton-touched. 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 preset. It is determined whether the weight value is within the allowable range. The determination result is displayed on the display device 8 in FIG. 9 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, the weight is out of the allowable range of the set weight. The commodity 7 is bounced off 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 conveyor for taking in the weight determination device 1 is regularly or irregularly. It is necessary to disassemble the device 3 and the belt conveyor type automatic weighing device 5 to perform maintenance such as cleaning. The work procedure for maintaining the belt conveyor automatic weighing device 5 will be described below, but the maintenance on the take-in conveyor device 3 side is almost the same.

First, the operation of the motor 32 of FIG. 1 is stopped, and the front portion of the sub-frame 12 is indicated by a chain line in FIG. 8 centering on the support pin 23R engaged with the hook groove 26R of the rear hook 25R. As shown, the support pin 23F at the front part is detached from the hook groove 26F of the hook 25F by lightly lifting upward in the arrow y direction. At this time, since the timing pulley 24 fixed to the shaft 10A of the drive roller 10 moves diagonally downward, the timing pulley 24 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 provided interlocking timing belt 49 becomes loose, 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 rear support pin 23R is disengaged from the diagonal hook groove 26R of the hook 25R. Therefore, the sub-frame 12 still equipped with the conveyor belt 14, the driving roller 10 and the driven roller 11 can be separated from the frame 9 side and can be subjected to a predetermined cleaning or the like as it is.

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 part of the subframe 12 is illustrated. As shown in FIG. 3, when the swing operation is performed rearward (right side in 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 other end of the driven roller 11 turns backward from the state of FIG. 6 around the ball bearing 21 side as shown in FIG. It becomes a loose posture. Thus, the conveyor belt 14 is loosened between the driving roller 10 and the driven roller 11, and the conveyor belt 14 can be laterally removed from the driving roller 10 and the driven roller 11 as shown by the arrow in FIG. ..

In the process of removing the conveyor belt 14 as described above, since the sub-frame 12 is already removed from the hooks 25F and 25R as described above, the conveyor belt 14 interferes with the hooks 25F and 25R. It can be removed smoothly to the side without any damage, and can be immediately subjected to predetermined cleaning with a shower ring, etc., and it is also easy to perform predetermined cleaning with respect to the drive roller 10, the driven roller 11 and the sub-frame 12. Can be done to.

On the other hand, the cleaning of the frame 12, the housing 31, the sub-housing 42, etc. on the main body side of FIG. 4 including the conveyor belt 14, the driving roller 10, and the driven roller 11 is removed in a detailed manner. The weight detector 34, the motor 32, and the like are completely waterproofed by the housing 31, the sub-housing 42, and the diaphragm 41, as described above. Therefore, the cleaning water and dust do not adhere to the motor 32 and the weight detector 34 at all. Further, even if water intrudes from a minute gap, the functions of the motor 32 and the weight detector 34, which have been already developed, are not impaired by the watertight structure.

In this way, after the predetermined maintenance such as cleaning is finished, 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 changed. When it becomes necessary to adjust, first loosen the bolts 61, 61 of FIG. 4 to move the sub-housing 42 to the housing 31 via the spigot portion 43 and the annular pressing plate 60 around the axis s. By rotating the rotary shaft 62 by a fixed amount, the rotary shaft 62 revolves around the axis s and is displaced, whereby the tension of the timing belt 49 is adjusted. During such tension adjustment, the gear 46 in the sub-housing 42 remains in mesh with the pinion gear 45 of the motor 32, and the gears 46 and 45 of the gears 46 and 45 are rotated to move around the axis s. It does not hinder the meshing relationship.

After the tension is adjusted to a desired value, the bolts 61, 61 are tightened again to fix the sub-housing 42 to the housing 31, and the timing belt 49 is connected to the timing pulley 48 on the sub-housing 42 side. The frame 12 is passed over in a free state between the timing pulley 24 and the frame. From this state, the support pin 23R at the rear portion of the sub-frame 12 is inserted into and engaged with the diagonal hook groove 26R of the rear hook 25R from diagonally above by an operation reverse to the operation shown in FIG.

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 rotated. Is inserted and engaged in 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 drive roller 10 is pivoted rearward in the diagonally upward direction around the hook groove 26R and set in a predetermined position, whereby the drive roller 10 is set between the timing pulley 24 and the timing pulley 48 on the sub housing 42 side. A predetermined tension is applied to the timing belt 49 that is suspended.

After this assembly, the conveyor belt 14 is moved to the side of the drive roller 10 and the driven roller 11 to the side opposite to the arrow shown in FIG. 7 until the squeeze hook 29 of the displacement mechanism 19 is opened. Insert it inward from the inside and hang it in place. Then, by squeezing the squeeze hook 29 of the displacement mechanism 19 to the front side to close the displacement mechanism 19, the slider 28 of FIG. 3 moves forward, and the bearing 21 of FIG. 7 returns to the initial position via the rod 27R. Then, the other end of the driven roller 11 supported by the bearing 21 returns to the tensioned posture. As a result, the conveyor belt 14 is stretched between the driving roller 10 and the driven roller 11 in a state in which a predetermined tension is applied, as shown in FIG.

As described above, all the mechanical parts can be arbitrarily disassembled and assembled. Therefore, in the normally used assembly position, maintenance of each part that cannot be reached due to other mechanisms or parts can be exposed by disassembling and can be performed easily and reliably. In addition, an efficient cleaning means such as a shower ring makes it possible to clean the whole body and manage it sanitarily. As described above, the intake conveyor device 3 can be easily maintained by the work of the procedure exactly the same as the above.

The attachment / detachment structure of the sub-frame 12 with respect to the frame 9 is not limited to the above-mentioned embodiment.

[0039]

[Effect of the device]

 As described above, according to the present invention, the conveyor belt drive motor is mounted not on the subframe side but on the frame side together with the weight detector, so that the structure on the subframe side is simple and lightweight. The structure can be easily attached and detached from the frame both in terms of structure and work. Further, the conveyor belt can be easily removed from the subframe removed from the frame side. Therefore, the entire device can be disassembled into smaller units, and cleaning and maintenance can be performed reliably and easily in every corner, which allows stable maintenance of the device's functions and hygienic management. It can be effectively used as a weighing device for food items.

Moreover, by simply switching the toggle type hook in the displacement mechanism, the conveyor belt can be detached from the side of the subframe and attached to the subframe. By applying a predetermined tension, the conveyor belt can be stretched in a predetermined manner between both rollers. That is, it is possible to attach and detach the conveyor belt during cleaning and maintenance very easily and efficiently.

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

FIG. 10 is a schematic diagram showing a schematic configuration of the belt conveyor type automatic weighing device of FIG. 9.

[Explanation of symbols]

5 ... Belt conveyor type automatic weighing device, 7 ... Product (object to be weighed), 9 ... Frame, 10 ... Drive roller, 11 ... Followed roller, 12 ... Subframe, 14 ... Conveyor belt, 1
9 ... Displacement mechanism, 29 ... Toggle type hook, 49 ... Interlocking belt.

Claims (1)

[Scope of utility model registration request] 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. , At least one roller is configured to be rotatable in a horizontal plane about one end side in the axial direction thereof, and the other end side in the axial direction is arranged on the other side along the direction in which the conveyor belt is stretched with respect to the subframe. Displacement mechanism that displaces in the tension direction away from the roller and in the loosening direction toward the other roller is provided. A tensioning posture in which a predetermined tension is applied to the conveyor belt by displacing the other end of the roller in the tensioning direction, and the tension of the conveyor belt is relaxed by the displacement of the roller, and the conveyor belt can be laterally removed from both rollers. The belt conveyor type automatic weighing device is provided with a toggle type hook that can be switched between two postures, a loose posture and a loose posture.