JP3446070B2 - Combination weighing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination weighing device for discharging articles each having a different weight in a target amount in a batch.

[0002]

2. Description of the Related Art Conventionally, a combination weighing device has been used in order to efficiently and collectively discharge a target amount of food or the like having a variation in weight. The combination weighing device supplies the objects to be weighed such as food to a plurality of weighing hoppers, weighs each, and based on the weighing results by each weighing hopper, selects a combination that is close to or equal to the target amount, and this combination is selected. The objects to be weighed are discharged from the weighing hopper, and the discharged objects to be weighed are collectively collected and discharged from a predetermined position.

In this type of weighing device, a funnel-shaped collecting chute is used to collect the objects to be weighed, which have been selected in combination and discharged from the weighing hopper, and discharge them to a predetermined position. When collecting and discharging the objects to be weighed, it is possible to use a collecting chute whose inner wall has a gentle inclination.Therefore, a plurality of weighing hoppers are annularly arranged along the edge of the collecting chute with a large opening surface at the top. It was

However, in the case of collecting and discharging an object to be weighed that contains moisture or oil and has an adhesive property, if an assembling chute having a wide upper opening surface and a sloping inner wall is used, the object to be weighed adheres to the inner wall. Then, the quantity of the objects to be weighed selected in combination and the quantity of the objects to be weighed actually discharged from the collecting chute are different, and highly accurate weighing cannot be performed. Further, as described above, it is necessary to frequently clean the weighing device that weighs and collects and discharges the objects to be weighed containing a large amount of water and oil. Ease is required.

As a technique for solving this, Japanese Patent Laid-Open No. 4-3
In No. 63630, a weighing hopper and a pool hopper for supplying an object to be weighed to each weighing hopper are formed into a cylindrical shape to prevent an adhesive object to be weighed from remaining in the hopper and to lower the weighing hopper. Place a table-shaped collecting board on the
The objects to be weighed discharged from each weighing hopper onto the collecting plate are gathered together in the center of the collecting plate by a pair of scrapers that can slide on the collecting plate, and dropped into the opening surface of the collecting chute with a small diameter and the inner wall having a steep slope. There is disclosed a combination weighing device configured as above.

[0006]

However, after the objects to be weighed discharged from the weighing hopper are dropped on the table-shaped collecting plate, the pair of scrapers are slid to move the objects to be measured on the collecting plate. With the method of collecting in the center and dropping it into the collecting chute, the scraper drive mechanism is large-scaled, maintenance is not easy, and the next object to be weighed cannot be discharged unless the pair of scrapers are returned to their original positions. However, there is a problem that the operating efficiency of the weighing device is reduced.

Further, as described above, in the weighing device using the table-shaped collecting plate, the collecting plate and the scraper for collecting the objects to be weighed must be cleaned at the place where the device is installed. There was inconvenience.

The present invention solves this problem, has a simple structure, and is capable of collectively ejecting sticky articles without lowering the operation efficiency, and moreover, is a combination weighing device which is easy to clean and maintain. It is intended to be provided.

[0009]

In order to solve the above-mentioned problems, a combination weighing device of the present invention comprises a housing and a plurality of tubular members supported so as to be linearly aligned along the front surface of the housing. a metering hopper is disposed below the front Symbol plurality of weighing hoppers, the objects to be weighed which have been combined discharged from said plurality of weighing hoppers
The accepted in combination with a conveyor for transporting in a predetermined direction
In the weighing device, the conveyor has the housing on one end side.
Is supported by the front part of the housing and the other end is projected in front of the housing.
The first roller shaft and the cylindrical first roller shaft.
A first roller body that is inserted and supported, and the first roller
It is provided at the tip of the shaft to prevent the first roller body from coming off.
A mechanism for regulating and releasing the regulation, and the first low
At a position laterally spaced from the horizontal axis by the casing.
A support shaft that projects from the front of the body and rotates to the support shaft
Freely attached arm body and one end side of the arm
It is supported by the body, and the other end is projected to the front of the housing.
2 roller shafts and cylindrically inserted and supported by the second roller shafts
The held second roller body and the tip of the second roller shaft
It is provided at the end and regulates the removal of the second roller body.
And a mechanism for releasing the regulation and the first roller book
A conveyor belt hung between the body and the second roller body
Is composed of, further to the front of the housing, the A
A stopper that abuts on the arm member to regulate its rotation, and the arm member is fixed at a position where it abuts on the stopper to apply tension to the conveyor belt, and release the fixation to fix the conveyor belt. It is provided with fixing mechanism for giving a loose.

[0010]

With the above construction, in the combination weighing device of the present invention, the objects to be weighed discharged from the plurality of cylindrical weighing hoppers arranged in a straight line on the front surface of the casing are supported by the conveyor below. On the conveyor belt, is conveyed in a predetermined direction, and is discharged from its end. If the arm supporting one roller of the conveyor is released and the arm is rotated in such a direction that one roller approaches the other roller, the distance between the rollers will become shorter and the conveyor belt will loose, it is possible to draw out the conveyor belt in front, or
Also, it is provided at the tip of each roller shaft and
If you release the mechanism to prevent it from coming off, each roller body
Can also be pulled forward.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 11 show an external appearance and a schematic structure of each part of a combination weighing device 20 of one embodiment for weighing an object to be weighed having an adhesive property. In these figures, a substantially rectangular parallelepiped casing 2 is provided on a base 21 of the combination weighing device 20.
2 are supported. A plurality of electromagnetic vibrating devices 23 (10 in this example) are arranged in a row in the width direction of the housing 22 in the upper part of the housing 22, and the vibrating shafts 23 a of the respective vibrating devices 23 are arranged in the housing 22. Is projected from the upper surface 22a.

A trough 24 formed in a gutter shape is attached to the upper end of each vibrating shaft 23a so as to face the front of the housing 22. An object to be weighed is supplied to each of the transport troughs 24 by a chute, a bucket conveyor, or manual insertion (not shown).

Each of the vibrating devices 23 vibrates the transport troughs 24 back and forth toward the front side of the casing 22 by energizing for a predetermined time, and vibrates and transports the objects to be weighed on the transport troughs 24 to the front end side. To do.

Below the front end of each transport trough 24, a pool hopper 25 having a hollow rectangular tube shape whose upper and lower sides are opened in a substantially square shape.
Are arranged respectively. The pool hopper 25 is shown in FIG.
As shown in, a collar portion 26 is formed of a synthetic resin, and a flange portion 26 is provided at the front and rear edges of the lower portion which is slightly smaller than the upper opening surface.
Two locking holes 27 are provided in one of the collar portions 26.

Each pool hopper 25 has a front surface 2 of the housing 22.
It is supported by frame bodies 28 attached to the left and right of 2b. That is, five pin fixing plates 29 are attached at predetermined intervals inside the front plate 28 a of each frame 28, and each pin fixing plate 29 is the same as the locking hole 27 of the pool hopper 25. Two locking pins 31 are provided upright at intervals.
Further, between the front plate 28a of the frame 28 and the front surface 22b of the housing 22, a pair of guide shafts 32 are installed in parallel on both sides of the pair of locking pins 31, respectively.
A bottom plate 33 is supported on each of the above. Each bottom plate 33 engages with one guide shaft 32 on the back side thereof,
It is supported slidably in the front-back direction.

Each pool hopper 25 includes a pair of locking pins 3.
In the state in which the locking hole 27 is locked to the first plate 1, it is supported so as to be placed on the bottom plate 33.

Each bottom plate 33 is formed in a substantially rectangular shape of a size that closes the lower opening surface of the pool hopper 25, and the rear side of one side thereof is a cylinder shaft 34a protruding from the front surface 22b of the housing 22. It is detachably connected to the tip. Each cylinder 34 provided in the housing 22 pulls in the cylinder shaft 34a until the front end of the bottom plate 33 is below the rear flange of the pool hopper 25, and opens the lower opening surface of each pool hopper, The cylinder shaft 34a is pushed out until the front end of the bottom plate 33 is below the front flange of the pool hopper 25, and the lower opening surface of each pool hopper 25 is closed.

Below each pool hopper 25, a weighing hopper 35 having the same shape as the pool hopper 25 is arranged.

Each of the weighing hoppers 35 is supported so that the front and rear directions thereof are opposite to those of the pool hopper 25, and as shown in FIG. 5, the two locking holes 3 provided in one of the collar portions 36.
7 is supported by each hopper support 40 supported on the front surface 22b of the housing 22.

Two locking pins 41 are projectingly provided on the upper surface of the hopper support body 40, and both ends of the hopper support body 40 extend in parallel to the front at intervals slightly wider than the intervals of the locking pins 41. A pair of guide shafts 42 are attached, and bottom plates 43, which are guided by the pair of guide shafts 42 and are slidable in the front-rear direction, are supported on the guide shafts 42. Each weighing hopper 35 is supported so as to be placed on the bottom plate 43 in a state in which the locking holes 37 are locked by the pair of locking pins 41.

Each bottom plate 43 is the bottom plate 3 of the pool hopper 25.
3 is formed in a rectangular shape of a size that closes the lower opening surface of the weighing hopper 35, and the rear side of one side thereof is detachably attached to the tip of the cylinder shaft 44a protruding from the front surface of the housing 22. It is connected. Each cylinder 44 provided in the housing 22 pushes out each cylinder shaft 44a, moves each bottom plate 43 forward, opens the lower opening surface of each weighing hopper 35, and retracts each cylinder shaft 44a. Each bottom plate 4
3 is moved to the housing side to close the lower opening surface of each weighing hopper 35.

Each hopper support 40 is detachably connected to a disc-shaped connecting plate 45 arranged on the front surface of the housing 22 via a locking mechanism 46. Each connecting plate 45 is
The cylinders 44 are supported by the load cells 47 fixed in the housing, and the cylinders 44 are also fixed to the connecting plate 45. It projects to the front.

Therefore, each load cell 47 has a weighing hopper 35, a hopper support 40, a guide shaft 42, and a bottom plate 4.
3, the load of the cylinder 44, the connecting plate 45, and the locking mechanism 46 is constantly applied, and the load by the object to be weighed is added to this steady load.

A timing hopper 50 having the same shape as the pool hopper 25 is arranged below each weighing hopper 35.

Each timing hopper 50 is supported on the front side of the housing 22 just like the pool hopper 25.
That is, as shown in FIG. 4, each timing hopper 5
Two locking holes 5 provided in one flange 51 at the lower end of 0
Reference numeral 2 denotes a frame body 5 fixed to the left and right of the front surface 22b of the housing 22.
A pair of guides which are locked by locking pins 56 protruding from the pin fixing plate 54 at the inner edge of the front plate 53a of No. 3 and are installed in parallel between the front plate 53a of the frame 53 and the front surface of the housing. It is mounted on a bottom plate 59 which is supported on a shaft 58 and slides back and forth.

Each bottom plate 59 is formed in a rectangular shape having a size that closes the lower opening surface of the timing hopper 50, and the rear side of one side thereof is at the tip of the cylinder shaft 60a protruding from the front surface of the housing 22. It is detachably connected. Case 22
Each cylinder 60 inside pulls in each cylinder shaft 60a, moves each bottom plate 59 to the housing 22 side, opens the lower opening surface of each timing hopper 50, and pushes out each cylinder shaft 60a to generate each bottom plate 59. Is moved forward to close the lower opening surface of each timing hopper 50.

Below the plural (10 in this embodiment) timing hoppers 50, two conveyors 65 and 66 are arranged on the left and right. The two conveyors 65, 66 are
Are formed symmetrically, the left side of the conveyor 65 conveys the right end receives the objects to be weighed which have been discharged from the left five timing hopper, the right of the conveyor 66 is discharged from the right five timing hoppers Receive the object to be weighed and convey it to the left end.

As shown in FIGS. 1 to 3 and FIGS. 6 and 7, each of the two conveyors 65 and 66 has a driving roller 67, a driven roller 68, and a conveyor belt 69 that is stretched between the pair of rollers. The drive roller 67 and the driven roller 68 are
The housing 22 is arranged in parallel in the lateral direction in a direction orthogonal to the front surface of the housing 22, and one end side thereof is supported by the front surface 22b of the housing 22.

That is, two motors 70 for driving the conveyor are fixed to the lower center of the housing 22.
One end side of the roller shaft 71 is connected to each of the rotating shafts. Each roller shaft 71 is inserted through a bearing 72 fixed to the front surface of the housing 22, and protrudes toward the front of the housing.

Each roller shaft 71 protruding from each bearing 72
Supports the roller main body 73 by inserting the roller main body 73 into the roller main body 73 such that the tip portion of the roller main body 73 protrudes from the end surface of the cylindrical roller main body 73.
Communicate to.

On the other hand, a rectangular support shaft plate 75 is fixed to the front surface of the housing 22 facing one end side of the driven roller 68 of each conveyor 65, 66. Each of the support shaft plates 75 is fixed to the front surface of the housing 22 by a bolt 77 that is inserted into upper and lower laterally elongated holes 76 and screwed to the front surface of the housing 22. It can be positioned at any position in the left-right direction by loosening.

On the front surface of each support shaft plate 75, a support shaft 7 having a predetermined diameter is provided.
8 is projected forward. An arm body 79 is rotatably attached to each support shaft 78. Arm body 79
Is a pair of front and rear arm plates 80 and 81 facing each other in parallel, and a cylindrical portion 82 whose front and back are fixed between one end sides of the arm plates 80 and 81.
And a bearing 83 whose front and back are fixed between the other end sides of the arm plates 80 and 81, and the cylindrical portion 82 on one end side is inserted into the support shaft 78 of the support shaft plate 75. The bearing 83 on the other end side can rotate about 78.

The arm plate 81 on the rear side of each arm 79 is provided with an extended portion 81a extending outward, and the front face of each support shaft plate 75 is in contact with the lower end of the extended portion 81a. A stopper 84 is provided so as to restrict the rotation of the arm body 79 to a position where the arm body 79 is substantially horizontal.

Below the stopper 84 of the support shaft plate 75, as shown in FIG. 8, the rotational position of the arm body 79 is fixed at a position where the extending portion 81a abuts on the stopper 84. The hook-type fixture 85 is attached, and the extension portion 81
A hook 86 for hanging the frame body 85a of the fixture 85 is attached to a.

The fixing member 85 constitutes the fixing mechanism of this embodiment together with the stopper 84, and is an operating portion 85b.
Of the arm body 79 by pushing down the operation portion 85b after the frame body 85a attached to the side is locked to the hook 86 by raising
Fixed to the stopper 84 of the support shaft plate 75,
This fixing is released by raising the operation portion 85b to the front side and removing the frame body 85a from the hook 86.

A bearing 83 fixed to the other end of each arm 79 rotatably supports one end of a roller shaft 89 of the driven roller 68.

A roller shaft 89 protruding from the bearing 83
Is a roller body 9 having the same diameter as the roller shaft 71 on the drive roller side and having the same shape as the roller body 73 on the drive roller side.
0 is inserted, and the tip end portion is projected from the end surface of the roller body 90.

In this way, the driven roller 68 is connected to the arm 7
It is rotatably supported on one end side of 9, and can be moved together with the arm body 79 about the support shaft 78 of the support shaft plate 75, and is close to the drive roller 67 within its moving range.
It can be separated.

As shown in FIGS. 6 to 8, rectangular screw support plates 87 are fixed to both side surfaces 22c of the housing 22 close to both support shaft plates 75, and each screw support plate 8 is attached.
An adjusting screw 88 for adjusting the horizontal position of the support shaft plate 75 is attached to the shaft 7. Adjustment screw 88
Is bolted laterally to the stopper 84 portion of the support shaft plate 75 and fixing the support shaft plate 75 to the housing 22.
With this loosened, if you rotate this adjusting screw 88,
The support plate 75 can be moved in the horizontal direction. By adjusting the position of each support plate 75 by the adjusting screw 88, the distance between the drive roller 67 and the driven roller 68 is suitable for the article conveyance with the extended portion 81a of the arm body 79 in contact with the stopper 84. It is predetermined to apply a different tension to the conveyor belt 69.

Therefore, when the fixing by the fixing members 85 is released and the arm bodies 79 are respectively rotated to the drive roller side, the conveyor belt 69 hung between the rollers can be loosened and pulled out to the front.

Guide grooves 73a and 90a are formed in the central portion of each roller body 73 and 90 along the circumferential direction, and guide grooves 73a and 90a are formed on the inner surface of the conveyor belt 69 spanned between the rollers. A projection band 69a is provided continuously to engage with the grooves 73a and 90a and prevent lateral displacement of the conveyor belt 96.

On the other hand, at the leading ends of the roller shafts 71 and 89 of the drive rollers 67 and the driven rollers 68 of the conveyors 65 and 66, the removal of the roller bodies 73 and 90 is restricted, and the roller bodies 73 and 90 are removed. Is equipped with a mechanism that allows each roller shaft to be pulled out by a simple operation without using a tool or the like.

That is, the roller shafts 71 and 89 are shown in FIGS.
As shown in 0, a shaft main body 71a having a diameter that can be inserted into the roller main bodies 73 and 90 with almost no space to reach the ends of the roller main bodies 73 and 90, and a screw hole 92 is provided at the center of the end surface, 89a and a ring restricting body 93 that is screwed into the screw hole 92 and forms a groove along the circumferential direction at the tip of each roller shaft 71, 89.

The ring restricting body 93 includes the shaft main bodies 71a and 89.
a cylindrical small-diameter portion 94 having an outer diameter smaller than the outer diameter of a, a screw portion 95 protruding from one end surface of the small-diameter portion 94 and screwed into a screw hole 92 of the shaft bodies 71a and 89a, and the small-diameter portion 94. A large diameter portion 96 formed on the other end surface of the shaft main body 71a, 89a and having the same outer diameter, and one end side supported by the side surface of the small diameter portion 94, and a spiral spring protruding in the radial direction of the small diameter portion 94. And the screw portion 9 in the screw holes 92 of the shaft bodies 71a and 89a.
5 is screwed to form a groove 98 along the circumferential direction between the shaft body and the large diameter portion 96.

Shaft bodies 71a and 89a and ring regulating body 93
A ring body 99 is attached to the groove 98 formed between the two.

The ring body 99 has an outer diameter that is the same as or slightly smaller than the outer diameter of the shaft bodies 71a and 89a, and a ring restricting body 93.
An inner diameter larger than the outer diameter (diameter of the groove 98) of the small diameter portion 94 of
It has a length slightly smaller than the length of the small diameter portion 94 (width of the groove 98).

Therefore, the ring body 99 is locked in a state with play in the radial direction and in a state where it does not come out of the groove 98. Further, the ring body 99, as shown in FIG.
The inner wall is pushed outward by a spring 97 protruding from the small-diameter portion 94, and the inner wall on the opposite side abuts the outer periphery of the small-diameter portion 94 and is always eccentric with respect to the shaft bodies 71a and 89a, that is, The shaft bodies 71a and 89a are biased so as to partially protrude from the outer peripheral surfaces thereof, and the protruding portion of the ring body 99 restricts the movement of the roller bodies 73 and 90 in the slip-out direction. Further, the ring body 99 is pushed in so as to oppose the biasing direction of the spring 97, and the shaft bodies 71a, 89
If it is concentric with a, the roller bodies 73 and 90 can be easily pulled out from the roller shafts 71 and 89.

In FIGS. 6 and 7, the frame member 100 whose end is supported by the front surface 22b of the housing 22 and which is extended between the drive roller 67 and the driven roller 68 of each of the conveyors 65 and 66, This is for supporting the conveyor belt 69 moving on the upper surface side of the conveyor from the lower surface thereof and preventing the conveyor belt from being distorted due to the weight of the object to be weighed.

The two conveyors 6 constructed in this way
A funnel-shaped collecting chute 110 is provided below the space between 5 and 66.
Is supported.

The upper opening surface 111 of the collecting chute 110
As shown in FIG. 11, it is formed in a square shape having a minimum size necessary for receiving the objects to be weighed out from the ends of the conveyors 65 and 66, and secures the adhered objects to be weighed. The inner wall surface from the upper opening surface 111 to the lower discharge port 112 is steeply sloped so that it can be discharged.

The collecting chute 110 includes the front surface 2 of the housing 22.
A pair of support members 113 are provided so as to project in parallel to the front from 2b, and are supported in a state in which they can be pulled out forward.

Between the left edge of the upper opening surface 111 of the collecting chute 110 and the lower surface at the right end of the conveyor 65, and between the right edge of the upper opening surface 111 and the lower surface at the left end of the conveyor 66, there are long lines. The plate-like return regulation plates 115, 116 are
It is arranged along the width direction of each conveyor.

The return regulating plates 115 and 116 are thin rectangular and have a length substantially equal to the belt width of the conveyors 65 and 66, and their upper edge portions 115a and 116a are conveyed on the lower surface side of the conveyors 65 and 66. The lower edge portions 115b and 116b are fixed to a pair of rotary shafts 120 and 121 that project in parallel from the front surface of the housing 22 in a state of being close to (almost in contact with) the belt.

The rotating shafts 120 and 121 rotate the return regulating plates 115 and 116 by a predetermined angle toward the inner side of the collecting chute 110 by the two motors 122 and 123 provided in the housing 22 to generate the original shafts. Driven to return to the position. When the objects to be weighed on the conveyors 65 and 66 are discharged from the end portion on the collecting chute 110 side by the control unit (not shown), the motors 122 and 123 return control plates 11.
5 and 116 are rotated.

The control unit (not shown) of the combination weighing device 20 detects the weight of the object to be weighed supplied to each weighing hopper from the output signal of each load cell 47 described above, and determines the target weight based on this weight value. The vibration devices 23 and the cylinders 34 described above are selected so that a similar combination is selected, the selected objects to be weighed are collectively discharged, and the objects to be weighed are supplied to the empty hoppers. , 44, 6
0, the motors 70, 122, 123 are controlled.

The operation of this combination weighing device will be described below. In advance, all transport troughs 24, pool hoppers 25,
The objects to be weighed are supplied to the weighing hopper 35, and the weighing hopper 3
Assuming that the weights of the objects to be weighed supplied to 5 are detected, a combination of the objects to be weighed is selected such that the total of the weight values is close to or equal to the preset target weight.

Then, the cylinders 44 corresponding to the weighing hoppers containing the objects to be weighed selected for the combination are driven and their respective cylinder shafts 44a are moved forward,
The bottom plate 43 blocking the lower surface of the weighing hopper 35 moves forward, and the objects to be weighed selected for the combination are discharged to the corresponding timing hoppers 50 as shown in FIG. In addition, in FIG. 12, the pool hopper is omitted and the objects to be weighed are indicated by diagonal lines.

When the weighing hoppers 35 are emptied, the bottom plate 33 of the corresponding pool hopper 25 slides toward the front side of the housing 22, and a new object to be weighed is emptied as shown in FIG. 12B. It is supplied to the hopper and weighed. When the pool hopper 25 becomes empty, the corresponding transport trough 24 is vibrated and driven, and a new object to be weighed is supplied to the empty pool hopper in preparation for the next supply to the weighing hopper.

During this period, when a discharge request signal is input from the outside, for example, the motors 70 of the conveyors 65 and 66 are driven, and the belts 69 gather the chutes 110 at the same speed.
Side is conveyed for about half a round, and conveyors 65, 6
When the objects to be weighed are accommodated in the designated timing hoppers, the timing hoppers farther from the collecting chute 110 are designated in order in accordance with the speed of No.
The timing hopper is opened and closed to discharge the object to be weighed onto the conveyor.

That is, as shown in (c), (d), and (e) of FIG. 12, the objects to be weighed are sequentially discharged from the timing hoppers (the leftmost and rightmost timing hoppers) farthest from the collecting chute 110 and combined. The objects to be weighed selected in step S1 are conveyed to the collecting chute 110 side while being gathered on the conveyor belts 69 of the two conveyors 65 and 66 (this discharge is performed with respect to the timing hopper accommodating the objects to be weighed). Only the bottom plate may be opened, or the bottom plate may be sequentially opened regardless of the presence or absence of the object to be weighed).

Most of the objects to be weighed discharged onto the conveyors 65 and 66 are carried out from the ends of the respective conveyors 65 and 66 and fall into the collecting chute 110, but a part of the objects to be weighed is adhered to the adhesive. Depending on the sex, as shown in FIG.
It adheres to the belt surfaces of the conveyors 65 and 66 and wraps around to the lower surface side. However, the upper edge portion 11 of the return regulating plates 115 and 116
5a and 116a are conveyor belts 69 on the lower surface side of the conveyor.
Since it is almost in contact with, the object to be weighed around this lower surface side is scraped off from the belt, and the collecting chute 1
Drop into 10.

Then, at almost the same time that the driving of the conveyors 65 and 66 is stopped (or after the conveyor is stopped), as shown in FIG.
As shown in FIG. 3B, when the motors 122 and 123 are driven and the return restricting plates 115 and 116 return to the original position after rotating a predetermined angle inward of the collecting chute 110, the return restricting plates 115 and The objects to be weighed attached to 116 also fall into the collecting chute 110.

For this reason, the objects to be weighed selected for the combination are all discharged into the collecting chute 110 without remaining on the conveyors 65 and 66 and falling outside the collecting chute 110. It is discharged from the discharge port 112.

When the bottom plates of the two innermost timing hoppers closest to the collecting chute 110 are closed, the objects to be weighed which are combined and selected in the meantime are discharged from the weighing hoppers to the corresponding timing hoppers in preparation for the next discharge request.

Hereinafter, similarly, the objects to be weighed by the weighing hoppers 35 and selected in combination are the timing hoppers 50.
It is discharged onto the conveyors 65 and 66 via the, and is collectively discharged from the inside of the collecting chute 110 by the conveyance of the conveyors 65 and 66.

As described above, in the combination weighing device 20, since the objects to be weighed discharged from the weighing hopper can be conveyed in a predetermined direction and collectively discharged by the conveyer which does not require a return drive, as in the conventional case. Compared with the collective discharge operation by the scraper, the structure is simple, and moreover, the objects to be weighed selected in combination can be efficiently discharged collectively.

Further, for cleaning or maintenance, for example, when it is necessary to remove the conveyor belt 69 of the right conveyor 66, the arm body 79 is released after fixing the arm body 79 by the fixing tool 85. As shown in FIG. 14, if the driven roller 68 comes closer to the drive roller 67 and the conveyor belt 69 loosens when it is rotated counterclockwise, the conveyor belt 69 can be easily pulled out to the front. The conveyor belt can be cleaned anywhere. This operation is the same for the conveyor 65 on the left side, and if the fixing by the fixing tool 85 is released and the arm body 79 of the conveyor 65 is rotated clockwise, the conveyor belt 69 is obtained.
Can be pulled out.

When the roller bodies of the conveyors 65 and 66 are to be removed for cleaning or maintenance, as shown in FIG. 15A, the roller bodies 73 and 90 are pulled toward the front side of the rollers. If the ring body 99 at the tips of the shafts 71 and 89 is pushed into the roller shaft so as to be concentric with the roller shaft, the
As shown in FIG. 5B, the roller bodies 73 and 90 can be moved forward, and can be easily pulled out from the roller shafts 71 and 89.

[0069]

Other Embodiments In the above embodiments, the present invention is applied to the combination weighing device that discharges the objects to be weighed, which are weighed by each weighing hopper 35 and selected as a combination, to the conveyor through the timing hopper 50. However, the present invention can be similarly applied to a combination weighing device that directly collects and discharges the objects to be weighed discharged from the weighing hopper without providing the timing hopper.

In the above embodiment, the objects to be weighed selected for the combination are gathered using two conveyors.
Use one conveyor to receive the objects to be discharged from all the weighing hoppers, or divide the weighing hoppers into three or more sets and have three objects to be discharged from each set of weighing conveyors. You may make it receive by the above conveyor.

In the above embodiment, the driven roller side of the conveyor is supported by the arm body. However, the drive roller side may be supported by the arm body, and the front and rear rollers are both drive rollers. The present invention can be applied to a case where the front and rear rollers are both driven rollers.

Further, in the above-mentioned embodiment, the pivot for pivoting the arm body is located between the pair of rollers of the conveyor.
As shown in FIG. 16, the roller 131 is rotatably attached to a support shaft 135 provided at a position farther from the one roller 130 than the other roller 131.
May be supported, and the arm belt 136 may be rotated clockwise to loosen the conveyor belt 132.

[0073]

As described above, in the combination weighing device of the present invention, the objects to be weighed discharged from a plurality of cylindrical weighing hoppers arranged in a straight line on the front surface of the housing are arranged below the weighing hopper. It is formed so as to be discharged onto a conveyor and conveyed in a predetermined direction, and one end side of a pair of rollers of the conveyor is supported on the front surface of the housing, and one of the rollers is projected on the front surface of the housing. The arm body is supported by an arm body rotatably attached to the support shaft, and a fixing mechanism for fixing or releasing the rotation of the arm body at a predetermined position is provided. The conveyor belt between the rollers can be loosened by rotating.

Therefore, with a simple structure, it is possible to efficiently discharge sticky objects to be weighed, and the conveyor belt as a collective discharge part of the objects to be weighed can be easily attached and detached for cleaning. And maintainability are greatly improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing the appearance of an embodiment of the present invention.

FIG. 2 is a schematic front view of one embodiment.

FIG. 3 is a schematic side view of an embodiment.

FIG. 4 is an enlarged perspective view of a main part of the embodiment.

FIG. 5 is an enlarged perspective view of a main part of the embodiment.

6 is an enlarged sectional view taken along the line AA of FIG.

FIG. 7 is a front view of FIG.

FIG. 8 is an enlarged perspective view of a main part of the embodiment.

FIG. 9 is an exploded perspective view of a main part of the embodiment.

FIG. 10 is an enlarged plan view of the main part of the embodiment.

FIG. 11 is an enlarged perspective view of a main part of the embodiment.

FIG. 12 is a schematic diagram for explaining the operation of one embodiment.

FIG. 13 is a schematic diagram for explaining the operation of one embodiment.

FIG. 14 is a front view of a main part for explaining a belt removing operation according to an embodiment.

FIG. 15 is an enlarged plan view for explaining the roller removing work of the embodiment.

FIG. 16 is a schematic front view showing the main part of another embodiment of the present invention.

[Explanation of symbols]

20 Combination weighing device 22 housing 24 transport trough 25 pool hopper 35 Weighing hopper 50 timing hopper 65, 66 conveyor 67 drive roller 68 Driven roller 69 belt 70 motor 71, 89 Roller shaft 71a, 89a shaft main body 73, 90 Roller body 75 Support plate 78 spindle 79 arm body 84 stopper 85 Fixture 93 Ring restriction body 97 spring 98 groove 99 ring body 110 Collective shoot

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-4-363630 (JP, A) JP-A-1-133806 (JP, A) Actually open Sho-64-36315 (JP, U) Actually open 1- 90712 (JP, U) Actual opening 1-90713 (JP, U) Actual opening 5-73537 (JP, U) Actual opening Sho 63-27832 (JP, U) Utility model registration 2539002 (JP, Y2) (58) ) Fields surveyed (Int.Cl. ⁷ , DB name) G01G 11 / G01G 13 / G01G 19/387 B65G

Claims (2)

(57) [Claims] 1. A housing, Supported in a straight line along the front of the housing
Multiple tubular weighing hoppers,Previous Below multiple weighing hoppersToPlaced,TheMultiple weighing
Items to be weighed that are combined and discharged from the hopperReceivedPredetermined direction
And a conveyor to transportIn combination weighing device with
hand, The conveyor is One end side is supported by the front surface of the casing, and the other end side is the casing.
A first roller shaft projecting forward of the body, A first roller, which is cylindrical and is supported by being inserted through the first roller shaft.
And the main body The first roller shaft is provided at a tip end portion of the first roller shaft, and
-A mechanism that controls the removal of the main body and releases the restriction
When, A predetermined space is provided laterally with respect to the first roller shaft.
At a position, a support shaft protruding forward from the front surface of the housing, An arm body rotatably attached to the spindle, One end side is supported by the arm body, and the other end side of the housing is
A second roller shaft projecting forward, A second roller, which is cylindrical and is inserted into and supported by the second roller shaft.
And the main body The second roller shaft is provided at a tip end portion of the second roller shaft.
-A mechanism that controls the removal of the main body and releases the restriction
When, Wrap between the first roller body and the second roller body
And a transport belt Furthermore, the front surface of the housing is in contact with the arm body.
A stopper that regulates its rotation, The arm bodyThe above
At the position where it touches the topperFix it and stretch it on the conveyor belt.
GiveandRelease the fixing and loosen on the conveyor belt
With a fixing mechanism that givesIs provided
Combination weighing device. 2.Provided at the tip of each roller shaft,
The mechanism that regulates the removal of the roller body and releases the regulation is Of the roller shaft Along the circumferential direction at the tipFormed bygroove
When, Outer diameter equal to or slightly smaller than the outer diameter of the roller shaft
And has an inner diameter larger than the diameter of the groove portion of the roller shaft,
-A ring body loosely fitted in the groove of the roller shaft, From the inside of the groove of the roller shaft to the radial direction of the roller shaft
With a spring that biases in the directionIs composed byCharacterized by
The combination weighing device according to claim 1.