JPH09280933A - Metering apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a simplifying of the structure along with a compact designing of a metering hopper and moreover, an accurate metering of an-object to be measured. SOLUTION: A metering hopper 7 is constituted of a hopper body 71 with an upper part thereof opened while having a discharge port 7b at a lower part thereof and a gate 72 to open or close the discharge port 7b of the hopper body 71 by its rotating operation. A rotating shaft 22 is arranged with the gate 72 mounted thereon and a cylinder 35 to open or close the gate by turning the rotating shaft 22. A bearing member 31 is mounted on a load cell 26 to support the rotating shaft 22 and the hopper body 71, the gate 72 and the cylinder 35 are supported on the load cell 26 through the bearing member 31 and the rotating shaft 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weighing device, for example, a combination weighing system for weighing an object to be weighed to a predetermined target weight by calculation based on the weight value of the object to be weighed respectively supplied to a plurality of weighing hoppers. The present invention relates to a weighing device used in an automatic weighing device.

[0002]

2. Description of the Related Art An object to be weighed is supplied to a weighing hopper provided in each of a large number of weighing machines, and a combination calculation is performed based on the measured values by the respective weighing machines so that the combined addition value matches a target value. By selecting the optimum combination that has the closest value to this value and discharging only the objects to be weighed in the weighing hopper corresponding to the measured value corresponding to the optimum combination, the weight of the target weight or the weight closest thereto is discharged. A combination weighing type automatic weighing device for obtaining a weighing object has been put into practical use.

By the way, an automatic weighing device of this type of combination weighing type has a weighing hopper body having an open upper portion and a discharge port provided at the lower portion, as disclosed in Japanese Utility Model Publication No. 7-6502. , A weighing hopper which is swingably supported by the weighing hopper main body and is constituted by a gate for opening and closing a discharge port of the weighing hopper main body, and the weighing hopper is supported via a bracket and supplied into the main body of the weighing hopper. With a load detector such as a load cell for detecting the load of the measured object, the automatic weighing device has a motor provided on the frame member side, and a cam attached to the output shaft of the motor, A linking machine provided on the side of the weighing hopper that opens and closes the gate in conjunction with the interlocking mechanism including an oscillating member that oscillates in conjunction with the operation of the cam and the oscillating member of the interlocking mechanism. It has a configuration in which door is provided.

Then, the loads of the objects to be weighed supplied to the respective weighing hoppers are respectively detected by the load cells, a combination operation is performed based on the measured values by the respective load cells, and the measured values correspond to the optimum combination. Only the gate of the weighing hopper is opened so that the objects to be weighed in the weighing hopper are discharged. In that case, the forward rotation of the motor operates the link mechanism via the cam and the swing member, which opens the gate and discharges the object to be weighed from the discharge port of the weighing hopper body. By the reverse rotation, the link mechanism is operated via the cam and the swinging member, whereby the gate is closed and the next object to be weighed is supplied into the weighing hopper body.

[0005]

By the way, in the weighing device having the above-mentioned structure, the rotational power from the motor is transmitted to the swing member through the cam, and the swing member is further passed through the link mechanism. Because it is a structure that transmits to the gate,
The frame member side requires a complicated interlocking mechanism such as a cam and a swing member in addition to the above motor, and the weighing hopper main body side also requires a complicated link mechanism. Had a complicated problem.

In addition, since the link mechanism is provided at the end of the shaft for supporting the gate on the weighing hopper body so as to be openable and closable, there is a problem that the entire weighing hopper becomes large.

Therefore, the present invention has been made in order to solve the above-mentioned problems, and the gate is directly opened and closed by the rotation of the rotary shaft by the driving means, so that the structure is simplified and the weighing is performed. An object of the present invention is to make the entire hopper compact and to accurately measure the objects to be weighed.

[0008]

In order to solve the above problems, a weighing apparatus according to the present invention detects a weighing hopper to which an object to be weighed is supplied and the load of the object to be weighed supplied to this weighing hopper. A weighing device having a load detecting means and discharging means for discharging an object to be weighed in the weighing hopper, wherein the weighing hopper has an open upper portion and a discharge opening provided at a lower portion. It is composed of a main body and a gate that opens and closes the discharge port of the hopper main body by a rotating operation, and the discharge means has a rotary shaft to which the gate is attached and the gate is opened and closed by rotating the rotary shaft. A bearing member supporting the rotating shaft is attached to the load detecting unit, and the hopper body, the gate, and the driving unit are connected via the bearing member and the rotating shaft. Characterized in that it is supported by the heavy detector.

According to the present invention, since the gate for opening and closing the discharge port of the weighing hopper body by the rotating operation is attached to the rotating shaft rotated by the driving means such as a motor, the rotating shaft is rotated by the driving means. The gate can be opened and closed to discharge the object to be weighed in the weighing hopper body. As a result, the rotation of the drive means is directly performed as the opening / closing operation of the gate as compared with the case where the interlocking mechanism including the cam or the swing member and the link mechanism are used for the opening / closing operation.

A bearing member for supporting the rotating shaft is attached to the load detecting means, and the hopper body, the gate and the driving means are all supported by the load detecting means via the bearing member and the rotating shaft. Because of the structure, the load other than the load of the object to be weighed on the load detecting means is always kept constant regardless of the state of weighing or non-weighing. The weighing object can always be measured accurately.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

In this embodiment, a combination type automatic weighing device to which the weighing device according to the present invention is applied is shown. First, the overall configuration of the automatic weighing device will be described.
As shown in FIGS. 1 and 2, the automatic weighing device 1 includes a base 2 having a horizontally long home base shape in plan view, and a base 2 installed on an upper rear portion of the base 2 with a flat upper surface and a plan view V. It has a character-shaped distributed workbench 3, and the inner space (rear side) of two sides of this distributed workbench 3 is a work area A for the worker a.

Further, five pool hoppers 6 ... 6 and 5 weighing hoppers 7 are provided on each of the left and right front wall portions 4 and 5 which bulge in a V shape from the center on the front side of the base 2. 7 are arranged vertically, and at the outside (front side) position of the distributed workbench 3, a vibration type that tilts downward from the front end of the workbench 3 and reaches directly above each of the pool hoppers 6 ... 8 is provided. Further, immediately below the weighing hoppers 7 ... 7, set conveyors 9 and 9 are provided for the front wall portions 4 and 5, respectively, and set between the opposite ends of the two conveyors 9 and 9. Shoot 1
0, and a carry-out conveyor 11 extending from below the chute 10.

With such a structure, the objects X to be weighed are first stacked on the distributed workbench 3, and then the worker a moves from the workbench 3 through the troughs 8 ... 8 to the pool hoppers 6 ... 6 respectively. Is distributed and supplied to the weighing hoppers 7 ... 7 from the hoppers 6 ...

Then, the weight of the object X to be weighed in each of the weighing hoppers 7 ... 7 is weighed, and a combination calculation is performed based on the weighed values, so that the combined addition value is set to a preset target weight or An optimum combination having a weight closest to this is selected, and the objects to be weighed X are discharged only from the weighing hoppers 7 ... 7 that correspond to the optimum combination, and are collected via the collecting conveyors 9, 9 and the collecting chute 10. After being assembled, it is transferred by the carry-out conveyor 11 to the next work area such as bag filling.

Next, the configurations of the pool hoppers 6 ... 6 and the weighing hoppers 7 ... 7 will be described. In this embodiment, as described above, a total of ten pool hoppers 6 are provided.
The weighing hopper 7 and the weighing hopper 7 are provided in the automatic weighing apparatus 1, but since each set has substantially the same configuration, one set will be described.

First, as shown in FIGS. 3 to 6, vertically elongated openings 12 are formed in the front walls 4 and 5 of the base 2 of the weighing device 1 so as to correspond to each set of hopper devices. Along with the base plate 13 from the outside so as to close the opening 12,
Are attached with bolts 13a ... 13a, and a pool hopper 6 and a weighing hopper 7 are vertically arranged side by side outside the base plate 13.

These hoppers 6 and 7 are gate type hoppers having substantially the same structure. As shown in FIGS. 3 and 4, these hoppers 6 and 7 are surrounded by four vertical wall surfaces on the front, rear, left, and right, and are opened horizontally (upper supply). Mouths 6a, 7a and hopper bodies 61, 71 having lower openings (discharge ports) 6b, 7b for releasing in an inclined manner
And attached to rotating shafts 14 and 22 which are rotated by cylinders 20 and 35 described later, and by rotating the rotating shafts 14 and 22, the discharge ports 6b and 7 of the hopper bodies 61 and 71 are discharged.
It has gates 62 and 72 that open and close the discharge ports 6b and 7b by swinging as shown by an arrow b between a closed position a that abuts along b and an open position a that hangs in a substantially vertical direction. .

The rotating shaft 14 for swinging the gate 62 of the pool hopper 6 is, as shown in FIG.
Is rotatably supported horizontally through a bearing member 15 assembled with bolts 15a ... 15a on the upper part of the base plate 13 and extends inward and outward of the base plate 13, and its inner rear end is shown in FIGS. In addition, the block member 16 is the bolt 1
It is fastened and fixed by 6a.

Similarly, as shown in FIGS. 5 and 6,
On the inner surface of the base plate 13, diagonally below the bearing member 15, a prism 17 having a prismatic shape is erected inward.
A support shaft 18 is provided at the protruding end of the bracket 17, and a cylinder 20 for moving the rod 19 forward and backward is rotatably supported by the support shaft 18 via a mounting flange 20a.

The tip portion 19a of the rod 19 is
And a block member 16 fixed to the rotating shaft 14 are connected to each other by a shaft 21 so as to be rotatable relative to each other. It is configured to rotate as shown by an arrow c between the position of and the position of the key.

On the other hand, the rotating shaft 22 for swinging the gate 72 of the weighing hopper 7 is also rotated by a substantially similar structure, but in this weighing hopper 7, the discharge is supplied from the pool hopper 6. A weighing mechanism for weighing the object to be weighed is provided, and the weighing mechanism will be described first.

That is, as shown in FIGS.
A rectangular block member 24 is fixed to a mounting bracket 23 fixedly provided on the back side of the base 2 with bolts 24a and 24a, and a horizontal cross section is provided between the block member 24 and the lower portion of the base plate 13. Character-shaped support member 25
Are attached with bolts 25a, 25a, 25b, 25b.

A load cell 26 as a load detector is arranged in parallel with the support member 25, and its rear end is fixed to the block member 24 with bolts 26a and 26a, and the movable end of the load cell 26 is fixed. A block member 27 having an L-shaped horizontal cross section is attached to the front end portion which is a portion by bolts 27a and 27a.

On the other hand, as shown in FIGS. 3, 4 and 6,
A circular opening 28 is provided in the base plate 13 above the mounting portion of the supporting member 25, and front and rear bearing members 30, 31 connected by bolts 29 ... 29 are arranged in the circular opening 28. A mounting arm 31a extends vertically downward from the rear bearing member 31, and the arm 31a is attached to the movable end of the load cell 26 as shown in FIG.
It is being fixed to 7 by bolts 31b and 31b.

With this structure, the rotary shaft 22 of the weighing hopper 7 is rotatably supported horizontally via the bearing members 30 and 31 as shown in FIG. As shown in FIGS. 5 and 6, the block member 3 extends in the inward and outward directions of
2 is fastened and fixed by bolts 32a.

Similarly, as shown in FIGS. 5 and 6,
A bracket 40 is provided upright on the rear bearing member 31, a spindle 33 is provided on the upper end of the bracket 40, and a cylinder 35 for advancing and retracting the rod 34 with respect to the spindle 33 is mounted via a mounting flange 35a. It is rotatably supported.

The tip portion 34a of the rod 34 is
And a block member 32 fixed to the rotary shaft 22 are connected to each other by a shaft 36 so that they can rotate relative to each other, whereby the rotary shaft 22 is moved through the block member 32 as the rod 34 moves forward and backward. It is configured to rotate as shown by an arrow c between the position of and the position of the key.

The outer surface of the base plate 13 is surrounded by the circular opening 28, as shown in FIGS.
The annular cover member 37 is attached with bolts 37a ... 37a, and in that case, the base plate 1
3 between the cover member 37 and the front and rear bearing members 30, 31
So as to close the circular opening 28 over and between
A bellows-shaped curtain member 38 is sandwiched.

Then, the gates 6 of the hopper devices 6 and 7 are respectively provided on the outer protruding portions of the two rotary shafts 14 and 22.
2, 72 are attached so as to rotate integrally. Next, the manner of mounting the gates 62 and 72 and the manner of mounting the hopper bodies 61 and 71 will be described. In this case, the mounting modes of both hopper devices 6 and 7 are substantially the same, so the pool hopper 6 will be described as an example.

That is, as shown in FIG.
The step portion 14a is formed on the outer protruding portion of
A key 39 fixed by a bolt 39a is projectingly provided on the front peripheral surface of the stepped portion 14a. Further, the gate 62 is formed with a cylindrical boss portion 62a which can be inserted into the rotary shaft 14, and the inner surface of the boss portion 62a can be engaged with the key 39 protruding from the rotary shaft 14. A key groove 62b is formed.

When the key 39 and the key groove 62b are aligned with each other, the boss portion 62a is inserted into the rotary shaft 14 so that the gate 62 is supported so as not to rotate relative to the rotary shaft 14. Has been done. At this time, FIG.
6 and the closed position A of the gate 62 and the rotating shaft 14 shown in FIG.
Is set so that the rotational position of the rotary shaft 14 and the open position B of the gate 62 coincide with the rotational position of the rotary shaft 14.

On the other hand, the hopper body 6 of each hopper 6, 7 device
1, 71 are attached to the outside of the base plate 13 as follows.

That is, as shown in FIGS. 3, 4 and 8, the first hook member 63 and the second hook member 6 extending laterally opposite to each other are provided on the front surface and one side surface of the hopper body 61.
4 and a peripheral groove 14b is formed at the tip of the rotary shaft 14. Also, base plate 1
On the outer surface of 3, auxiliary shaft 6 extending forward in parallel with rotation shaft 14 is provided.
5 are protrudingly provided.

The tip peripheral groove 14 of the rotary shaft 14 is
The first hook member 63 is provided at b and the second hook member is provided at the second auxiliary shaft 65.
By engaging the hook members 64 from above, the hopper body 61 is attached to a position directly above the gate 62. At this time, the gate 62 is connected to the hopper body 6
The engagement between the first hook member 63 of No. 1 and the tip of the rotary shaft 14 prevents the slip-off from the rotary shaft 14, and the step 14a of the rotary shaft 14 prevents the rotary shaft 14 from rotating.
Axial movement is prevented.

In the weighing hopper 7, the auxiliary shaft 75 with which the second hook member 74 engages is the base plate 13
The arm member 3 fixed to the front surface of the bearing member 30 as shown in FIGS.
It is projected from 0a. As a result, the loads of all the mechanisms from the weighing hopper 7 to the cylinder 35 and the like are applied to the load cell 26.

As described above, in the pool hopper 6 and the weighing hopper 7 according to this embodiment, the opening and closing operations of the gates 62 and 72 of the pool hopper 6 and the rotation operations of the rotating shafts 14 and 22 by the cylinders 20 and 35 are directly performed. Since it is carried out by being transmitted and swinging, it has a simpler structure than that which is conventionally used to open and close by an interlocking mechanism composed of a cam and a swinging member and a link mechanism.

In that case, each hopper device 6, 7
The hopper main bodies 61, 71 and the gates 62, 72 are separated from each other, and the gates 62, 72 have bosses 62a,
The first hook member 6 of the hopper main bodies 61, 71 is detachably attached to the rotary shafts 14, 22 via 72a.
Since the dropouts from the rotary shafts 14 and 22 are prevented by the screws 3 and 73, the gates 62 and 72 can be easily removed or assembled from the weighing device 1.

Further, also in the hopper main bodies 61, 71, the hopper main bodies 61, 71 have the first hook member 63,
73 and the second hook members 64 and 74, the rotary shaft 1
Since the tip ends of 4, 22 and the auxiliary shafts 65, 75 provided separately from the gates 62, 72 are detachably engaged, the hopper bodies 61, 71 can be easily and automatically metered. It can be removed from 1 or assembled.

Therefore, by removing the hopper bodies 61, 71 from the rotary shafts 14, 22 and the auxiliary shafts 65, 75, the gates 62, 72 can be removed from the rotary shafts 14, 22 at the same time, and these hopper bodies can be removed. 6
1, 71 and the gates 62, 72 are separate members, so that the hopper devices 6, 7 can be easily disassembled, and cleaning work and attachment replacement work can be efficiently performed. It will be.

A bearing member 31 for supporting the rotary shaft 22 is attached to the load cell 26, and the hopper body 71, the gate 72, the cylinder 35, and the like, that is, the above-mentioned, through the bearing member 31 and the rotary shaft 22. Since the load of all the mechanisms from the weighing hopper 7 to the cylinder 35 is applied to the load cell 26, the load other than the load of the object X to be weighed on the load cell 26 can be measured or not measured. Therefore, the load cell 26 can always keep a constant value, so that the object X to be weighed by the load cell 26 can always be accurately measured.

In the above embodiment, the cylinders 20 and 35 are used as the driving means for the gates 62 and 72. However, as shown in FIGS. 9 and 10, the motors 81 and 8 are used.
Alternatively, the rotational drive of No. 2 may be transmitted directly or via gears 83 and 84.

That is, in the pool hopper 6, the base block 8 fixed to the inner surface of the base plate 13 is provided.
1c and the bracket 81b, the drive motor 81 is attached, the output shaft 81a of the motor 81, and the gate 6
The two rotary shafts 14 are coaxially connected so that the rotational drive of the drive motor 81 is directly transmitted as the swing motion of the gate 62.

On the other hand, in the weighing hopper 7, the drive motor 8 is mounted on the bracket 82b fixed to the rear bearing member 31.
2, the gear 83 provided on the output shaft 82a of the motor 82 meshes with the gear 84 provided on the rear end of the rotary shaft 22 of the gate 72, and the drive motor 82
The rotational drive of the gate 7 is indirectly performed via the gears 83 and 84.
2 is transmitted as a swing motion.

Even in the case of such a configuration, as in the case of the previous embodiment, the driving of the drive motor 82 is simply performed by opening / closing the gate 72 via the rotary shaft. In addition, the load cell 26 includes a bearing member 31 that supports the rotary shaft 22 and the rotary shaft 22, and the hopper main body 71, the gate 72, the drive motor 82, and the like, that is, all the mechanisms from the hopper main body 71 to the drive motor 82. Since the load is applied to the load cell 26, the load other than the load of the object to be weighed X on the load cell 26 can be kept constant irrespective of the state of weighing or non-weighing. As a result, the weighing object X can always be accurately weighed by the load cell 26.

[0046]

As described above, according to the present invention, the gate that opens and closes the discharge port of the weighing hopper main body by the rotating operation,
It is attached to a rotary shaft that is rotated by a driving means such as a motor, and opens and closes the discharge port of the hopper body by rotating with the rotation of the rotary shaft. In addition, the structure of the weighing device can be simplified and the entire weighing hopper can be made compact as compared with the case where the opening / closing operation is performed by the link mechanism.

Further, the load detecting means is provided with a bearing member for supporting the rotating shaft, and the hopper body, the gate and the driving means are supported together by the load detecting means via the bearing member and the rotating shaft. Because of the structure, the load except the load of the object to be weighed on the load detecting means can be constantly kept constant regardless of the state of weighing or non-weighing, which allows the load detecting means to detect the load. It is possible to accurately weigh the object.

[Brief description of drawings]

FIG. 1 is a plan view of a combination-type automatic weighing device to which a weighing device according to the present invention is applied.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of a pair of hopper devices in which a pool hopper and a weighing hopper are vertically arranged.

FIG. 4 is a vertical cross-sectional view showing a configuration around a rotation axis of a weighing hopper and a pool hopper.

FIG. 5 is a side view showing a configuration in which a cylinder is used as a driving means for opening and closing the gates of the weighing hopper and the pool hopper.

FIG. 6 is a rear view of the same.

FIG. 7 is a horizontal sectional view showing the structure of a weighing mechanism in the weighing hopper.

FIG. 8 is an explanatory view showing a mode of assembling the hopper body and the gate.

FIG. 9 is a side view showing a configuration in which a motor is used as a drive unit for opening and closing the gates of the weighing hopper and the pool hopper.

FIG. 10 is a rear view of the same.

[Explanation of symbols]

 7 Measuring Hopper 22 Rotating Shaft 26 Load Cell 31 Bearing Member 35 Cylinder 71 Hopper Main Body 72 Gate 82 Motor

Claims (1)

[Claims] 1. A weighing hopper to which an object to be weighed is supplied, and load detection means for detecting a load of the object to be weighed supplied to the weighing hopper, and the object to be weighed in the weighing hopper is discharged. A weighing device provided with a discharging means, wherein the weighing hopper comprises a hopper body having an opened upper portion and a discharge opening provided at a lower portion, and a gate for opening and closing the discharge opening of the hopper body by a rotating operation. In addition, the discharging means includes a rotating shaft to which the gate is attached, and drive means for opening and closing the gate by rotating the rotating shaft, and a bearing member for supporting the rotating shaft. Is attached to the load detecting means, and the hopper body, the gate, and the driving means are supported by the load detecting means via the bearing member and the rotating shaft.