JPH07117442B2 - Hopper gate opening / closing device of automatic weighing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The disclosed technology is applied to a hopper such as a weighing hopper of an automatic weighing device provided in a backyard of a supermarket or the like and weighing as much as possible to a set weight value of a product. It belongs to the technical field of the structure of a device for opening and closing a gate.

<Summary of Summary> Accordingly, the invention of this application is a combination weighing of a predetermined number of heads installed in a backyard of a supermarket or the like and weighing the set weight value of a predetermined product as close to or as possible as possible. From the feeder section at the top of the automatic weighing device such as the device to the gate used for opening and closing the hopper of a predetermined type that is interposed in the product passing mechanism section related to the weighing mechanism section such as the pool hopper and the weighing hopper, An opening / closing device provided via a link, in particular, an invention relating to a hopper gate opening / closing device of a weighing device in which a drive motor is provided in its frame and a gate is opened / closed by the operation of the drive motor,
Especially from the drive motor to the gate on both sides, or
An arm is extended laterally on one side, and an opening and closing member such as a roller that can be smoothly brought into contact with and separated from the link is provided at an end portion of the arm, and an operation unit for operating the link mechanism is provided. The present invention relates to an hopper gate opening / closing device of an automatic weighing device, wherein a plurality of operating portions are arranged on the rotation locus of the opening / closing element so that the motor is rotated in the forward / reverse direction or selectively abutted.

<Prior Art> As is well known, as the quality of life of citizens improves, various products are traded in large quantities in small quantities in the secondary market. There is an increasing demand for precise measurement and strict measurement and management.

Generally, the weight and the like are used as the standard for the quantity, but the mode of weighing by the weight has come to be widely adopted because of the merits of easy handling and the like. It is very important to measure the weight of a product that is equal to or close to the set weight value.

For this reason, for example, the theory of statistics and probability as seen in many of the applicant's inventions of prior applications, and a combination weighing device in which a predetermined number of heads are arranged in a circle through high-speed calculation by a computer, etc. An automatic weighing device has been developed and put to practical use, and further various development and improvement studies have been made, and the number of weighing devices having more advanced functions is increasing.

Although there are various objects of these development studies, they are roughly classified into high-speed calculation, accurate operation, and cost reduction.

By the way, in such an automatic weighing device of the combination weighing method, the point of software centering on the calculation by the computer and the point of hardware of the automatic device of the mechanical mechanism part 2
However, due to the large amount of products and rapid processing, the approximation device is becoming larger, and mutual interference between devices in one plant and interference in the interaction with peripheral devices, as well as vibration and noise. However, due to its durability and improvement of the work environment, it cannot be ignored.

By the way, in this kind of automatic weighing device, a pool hopper or a weighing hopper is provided in a product flow-through mechanism portion during a process of loading a product from a carry-in conveyor from a preceding stage through a measuring mechanism section to a next-stage package device or the like. Various hoppers such as etc. are provided to ensure the accuracy of weighing, many devices for opening and closing each of these gates are attached, and high-speed high-speed opening and closing of the gate is achieved through the control of a computer program. However, the opening and closing of the gate in these mechanical parts is essentially a mechanical opening and closing method.

A combination weighing device 1 which is an example of various automatic weighing devices is briefly described with reference to FIG. 5, and a feeder 3 of a dispersion table is provided by an electromagnetic vibration device 4 at the center of the upper part of the device frame 2 to allow three-dimensional vibration. Are provided on the peripheral portion thereof with a predetermined number of heads being supported by the electromagnetic vibrating device 6, and the respective tip portions thereof are exposed and connected to the pool hopper 7, and Each pool hopper 7 is connected to a weighing hopper 8 on the lower side thereof, and the weighing hopper 8 is detachably supported by a load cell 9 provided on the apparatus frame 2 and faces a lower collecting chute 10. The chute and 10 are connected to a packaging device for the next stage (not shown).

Then, the weighing hopper 8 is subjected to a predetermined combination weighing operation by a computer (not shown), and the gate 11 of the weighing hopper 8 which has been given to the predetermined combination is opened and closed, and the weighed products are collected from the collecting chute 10 to the next package. It is discharged to the apparatus and the gate 12 of the upper pool hopper 7 is opened and closed accordingly.

Thus, the gates of the pool hopper 7 and the weighing hopper 8
The opening and closing operations of the reference numerals 12 and 11 are adapted to be opened and closed by the advancing and retracting operation of the push rod 14 of the opening and closing mechanism linked to the drive unit 15 via the link 13.

As described above, in the combination weighing device 1,
In order to perform large-scale continuous processing and high-speed processing more accurately and quickly, a design such as a mode in which the weighing hopper 8 at the lower stage of the pool hopper 7 is provided as a twin type such as two inside and outside Further, the weighing hopper 8 is provided with the gates 1 for the collecting chutes 10 inside and outside the lower stage.
1 and 11 are of a high-speed type such as opening and closing in and out, and further, a higher-speed type device in which a memory hopper (not shown) is provided in the lower stage of the near clock amount hopper 8 has been developed. The gate 12 is made into a twin type, and also in the weighing hopper 8, the mode in which the gates 11 of the inside and outside twin type are used is widely adopted, and therefore, the twin type through the link 13 of the push rod 14 is used. Intermittent operation for gates 12 and 11 is as opening and closing operation,
There is a problem in that the time-division operation of the cycle time is difficult to take, and, as described above, there is a problem that the design becomes difficult in terms of accuracy.

In addition, there is a minus point that the operation conversion mechanism for opening and closing the gates 12 and 11 by the turning operation of the push rod 14 via the link 13 through the link 13 is also difficult to disassemble from the moment, and moreover, due to wear over time. The rattling or the like is caused, which makes it difficult to perform a smooth operation, and the inconvenience that vibrations or noises are likely to occur is becoming more inconvenient.

Further, there is a demerit that it is not possible to maintain good mechanical dynamic characteristics enough to operate in a cycle with respect to a gate provided as a twin type in one hopper with a set time difference.

Such a problem has been a similar problem not only in the combination weighing device 1 having the circular arrangement described above but also in another automatic weighing device having a lateral arrangement or the like as a mode in which various hoppers are provided in the weighing mechanism.

These problems have also been a bottleneck in the above-mentioned speeding up of weighing and mechanization.

<Object of the Invention> The object of the invention of this application is to provide a full scale to the mutual adjoining mechanism of the gates of the hopper in a mode in which the hopper is equipped in the weighing mechanism of the automatic weighing device such as the combination weighing device based on the above-mentioned prior art. As a technical issue that should solve the problems of automatic opening and closing, selective and smooth opening and closing operation of the gate is certain,
Further, it is an object of the present invention to provide an excellent hopper gate opening / closing device of an automatic weighing device which can be performed at high speed and which does not generate vibrations or noises and which is useful for the field of measurement technology application in the distribution industry.

<Means and Actions for Solving the Problems> In order to solve the above-mentioned problems, the configuration of the invention of the present application, which is based on the above-mentioned object, has the combination measuring device such as a circular array of a predetermined number of heads. When measuring the product weight of an automatic weighing device such as a product, the product supplied to the feeder flows through the various hoppers of the weighing mechanism and is supplied to the next stage through the opening and closing of the gates of these hoppers. The drive motor of the hopper gate opening / closing device set to is operated in a predetermined manner through a control device as an operating portion, and the drive shaft is provided at the tip of the output shaft of the drive motor in both directions, or
A roller provided so that the arm extending in one direction pivots in one direction or in the opposite direction by 90 ° through the rotation of the output shaft so as to be idled at the tip of the arm. The gate of the hopper is smoothly brought into contact with or separated from the opening / closing member such as a roller by the opening / closing of the opening / closing member or the like coming into contact with or separating from the link provided integrally with the hopper, thereby selecting the gate. The technical measures are taken so that the product is opened and closed reliably in a predetermined manner, a predetermined amount of the product is measured, and the product is fed to the next stage.

<Embodiment> Next, referring to FIG. 5, an embodiment of the invention of this application will be described.
The following is a description with reference to FIGS.

In the embodiment shown in FIGS. 1 and 2, 16 is a hopper gate opening / closing device which forms the center of the gist of the invention of this application, and in the embodiment, a predetermined number of heads shown in FIG. For both the pool hopper 7 of the combination weighing device 1 as a weighing device and the twin type weighing hoppers 8 and 8 provided below and inside the pool hopper 7 (only one weighing hopper 8 is shown in FIG. 1 for convenience). It is one set of modes, and its cubic type housing 17
The connector provided at the tip of each lead wire from the cable 19 to various electrical components provided on the inner surface of the substrate 18 on the back surface of the substrate 18 is freely connectable to a pin (not shown) of the substrate 18.

A pair of load cells 20, 20 are fixedly installed in the housing 17 on both sides of the center.

Then, for the load cell 20, 20, each hanger 21,
It is mounted on the weighing hopper 8 via 21 and a pair of upper and lower, for example, stepping motors 22 and 22 'are arranged between the load cells 20 and 20 in a predetermined manner.

The output shaft 23 of the upper one-way rotation type stepping motor 22 is fixedly provided with arms 24 in a manner orthogonal to both directions from its tip, and the pins 2 extending forward from both ends thereof.
A roller 26 as an opening / closing element is provided in each of 5 and 25.

And a stepping motor that rotates backward by 90 °
An arm 24 'in one direction is fixed to the tip of the output shaft 23' of the 22 'in a direction orthogonal to the crank shaft and laterally extended. A pin 25 extending from the tip of the arm 24' also has a roller as an opening / closing element.
26 are in play.

Therefore, a pair of rollers 26, 26 are mounted on the output shaft 23 of the upper stepping motor 22, and one roller 26 is mounted on the output shaft 23 'of the lower stepping motor 22'. .

Thus, the pair of gates 12, 12 of the pool hopper 7 are each provided with a link 27 (only one gate 12 is shown in FIG. 1 for convenience of illustration, but the other gate 12 is shown). 12
Of course, it is also provided for. ), A receiving plate for the roller 26 at its lower end
28 are fixed integrally.

Therefore, by rotating the output shaft 23 of the upper stepping motor 22 in one direction by 90 ° or in the opposite direction by 90 °, the rollers 26, 26 at both ends of the arm 24 can receive the receiving plate of each link 27.
It is configured to selectively and reciprocally and smoothly abut on the gate 28, and selectively open and close the gates 12 and 12 via the pressing action.

Then, the rotation operation of the motor 22 is operated by a predetermined program by a control device as an operation unit via a computer (not shown).

On the other hand, one roller 26 of the cantilever type arm 24 'of the output shaft 23' of the lower stepping motor 22 'is actuated by the output shaft 23' which is rotated by 90 ° alternately in reverse by the rotational operation of the stepping motor 22 '. And a pair of weighing hoppers 8 mounted on the load cells 20, 20 via hangers 21, 21, respectively.
8 (only one weighing hopper 8 on one side is shown in FIG. 1 for convenience of illustration as described above, but it goes without saying that a pair is provided). The respective gates 11 for the pair of weighing hoppers 8 and 8 provided under the receiving plates 28 'of the links 27', which are selectively abuttingly engaged and separated from each other, are selectively and That is, it is arranged so that it can be opened and closed in a repulsive manner.

Therefore, the operation of each of the stepping motors 22 and 22 'is merely a rotation (rotation) action, and there is no conversion action such as a rotation to a linear motion or a linear motion to a rotary operation.
The gates 11 and 12 are opened and closed smoothly by opening and closing, and the rollers 26 and 26 are abutted and separated from the receiving plates 28 and 28 'when the rollers 26 and 26 are transferred.
Since the 26 is mounted on the pin 25, the receiving plate 2
The contact and separation with respect to 8, 28 'are performed quietly, and the resetting action is surely given by the spring mechanism. Therefore, the roller 26 and the receiving plate 2 associated with opening and closing are
It is possible to avoid vibration and noise at the time of separating from contacting with 8 and 28 ', and also because the selective opening / closing action of independent discharge prevents the other opening / closing actions from interfering with each other. There is no.

Opening / closing device for each weighing hopper 8 and pool hopper 7
The attachment / detachment with respect to 16 can be easily performed through the slit (not shown) on the upper part of the housing 17 without any difficulty.

The swing radii of the arms 24 and 24 'and the rollers 26 and 26 are such that the pool hopper 7 and the gate 12 of the weighing hopper 8 and the links 27 and 27' of 11 contact the receiving plates 28 and 28 '. The mating design is made beforehand so that it is within the range.

In the above-mentioned structure, when peanuts for small-quantity weighing as a product are carried in by a bucket conveyor (not shown) and placed right above the dispersion table 3 of the combination weighing device 1 as a weighing device, the peanuts are moved by the electromagnetic vibration device 4. The radiation troughs 5, 5 ... Having a predetermined number of heads are dispersedly supplied from the peripheral portion, the radiation troughs are advanced by the electromagnetic vibration device 6, and the pool hoppers 7, 7 ... Are thrown in, and each pool is similar to the conventional mode. It is thrown into the corresponding weighing hopper 8 from the hopper 7 in a baton-touch manner, its weight is weighed by the load cell 20, predetermined combination weighing is performed, and the gate 11 of the weighing hopper 8 given to the combination is opened and closed by the computer. However, the stepping motor 22 'is actuated in a predetermined manner by a control device as an operation unit (not shown) via the computer. Through the force shaft 2 ', the arm 24' is rotated 90 degrees to the right or left, and the roller 26 as an opening / closing element is selectively used as the receiving plate 28 'of the link 27' of the corresponding left and right weighing hoppers 8. Draw a circular arc on and make a contact with it, and press it smoothly.
Open and close 11.

Of course, at this time, the rotation of the arm 24 'causes the roller 26 to come into contact with the receiving plates 28' of the left and right weighing hoppers 8, 8 ... Link 27 'does not abut the receiving plate 28', so that both weighing hoppers 8, 8 simultaneously
There is no danger of opening and closing 11, 11.

When the peanuts are discharged to the collecting chute 11 by opening / closing one of the gates 11 of the weighing hoppers 8 and 8, the gate 12 on the corresponding side of the upper pool hopper 7 is controlled via a control device (not shown) serving as an operation unit. Support plate 28 for link 27
On the other hand, the stepping motor 22 rotates and the output shaft 23 causes the arm 24 to rotate 90 ° to the right or left to come into close contact with the receiving plate 28 of the link 27 of the corresponding gate 12 and press this. Then, it is opened and closed, and the peanuts supplied inside are supplied to the weighing hopper 8 on the open side.

With respect to the opening and closing of the left and right gates 12, 12 of the pool hopper 7, since the rotation direction of the stepping motor 22 is determined in advance, the left and right gates 12, 12 do not open and close at the same time. One of the weighing hoppers 8 and 8 is opened and closed corresponding to only the weighing hopper 8 on the side of the gate 11 which is open.

By performing such an operation, combination weighing of small quantities of peanuts is continuously performed, and the stepping motor
Receiving plate 2 of rollers 26, 26 by repetitive rotation of 22, 22 '
The contact / separation opening / closing operation with respect to 8 and 28 ′ repeats this operation characteristic in a good manner, and the contact / separation of the roller 26 with respect to the receiving plates 28 and 28 ′ can be rotated and rotated with respect to the pin 25. The contact and separation are smooth, and therefore, unlike the contact and separation from the front of the link of the conventional push rod, there is less vibration and noise, less wear, and rattling over time. Instead, a good opening and closing action as designed is achieved.

Next, in the embodiment shown in FIGS. 3 and 4, the arms 24 and 24 'are different from the pool hopper 7 and the weighing hoppers 8 and 8 of the above-mentioned embodiment in the different design sizes with respect to the stepping motors 22 and 22'. In order to cope with the uneconomical mass production, a pair of pin holes 27, 27 are bored in the base end side of the arm 24 'in the longitudinal direction. The pin 28, 28 having a small stopper pin 29, 29 along the axial direction at the tip of an attachment type short arm 24 in which a roller 26 is loosely mounted. Insert into the pins 27, 27 of the arm 24 'as shown
By inserting 9 and 29 into the pin holes 28 and 28 and engaging them, the arm 24 'of the stepping motor 22' shown in FIG.
In this embodiment, the long arm 24 for the stepping motor 22 is also used so that the mass production supply system can be realized.

Needless to say, the embodiment of the invention of this application is not limited to the above-described embodiment. For example, the automatic weighing device is not only a combination weighing of a predetermined number of heads in a circular arrangement, but also an automatic weighing of heads in a horizontal parallel arrangement. Various modes such as applicable to an apparatus or the like can be adopted.

In addition, it goes without saying that the opening / closing element may be replaced with a roller to form a shoe in design change.

It goes without saying that the target product can be a product other than peanut.

<Effects of the Invention> As described above, according to the invention of the present application, basically, a weighing hopper or a pool hopper provided in a weighing mechanism portion of a product passing portion of an automatic weighing device such as a combination weighing device having a predetermined number of heads in a circular arrangement. In a gate opening / closing device of a predetermined type such as a hopper, a roller as an opening / closing element is provided at the tip of an arm extending sideways or one side of the output shaft of a drive motor such as a stepping motor. Since there is a link provided in the turning radius through the operating portion so as to directly contact the gate indirectly, the push-rod of the front contact type and the link contact link of the conventional mode which can freely move back and forth. Unlike the case, the opening / closing element is provided directly on the output shaft of the drive motor and swivels to come into contact with and separate from the link, so that the link smoothly moves toward and away from the link. In addition, unlike the contact pressure from the front side, it has the advantage that noise and vibration are unlikely to occur, and despite the smooth opening and closing action, the direct turning force of the drive motor immediately causes the gate to move through the link. In order to give the opening and closing action, the opening and closing efficiency is good, and moreover, the rotation of the arm to the right or left is selectively performed by the drive motor, and the selective opening and closing action for each gate of a pair of hoppers is smooth. As a result, the dynamic characteristics are good and the malfunction of opening and closing does not occur, and in addition, the arm is pivotally connected to the output shaft of the drive motor so that the opening and closing power transmission can be performed. The system does not have a conversion mechanism from circular motion to linear motion, etc., and from this point also the power transmission efficiency is good, there is no rattling over time, the durability of the device is good, and maintenance and maintenance are required. Effect of reduction is achieved.

Further, there is also a secondary advantage that the mechanism portion can be simplified by designing the opening / closing device for the gates of the plurality of hoppers as one unit to be detachably attached to the device frame.

[Brief description of drawings]

1 to 4 are explanatory views of an embodiment of the invention of this application. FIG. 1 is a perspective side view of one embodiment, FIG. 2 is a perspective view of the same, and FIG. 3 is another embodiment. FIG. 4 is a partial perspective view, FIG. 4 is a partial sectional side view of the same, and FIG. 5 is a side view of a combination weighing device as an automatic weighing device. 1 ... Automatic weighing device, 7, 8 ... Hopper, 11, 12 ... Gate, 13 ... Link, 28 ... Receiving plate, 2 ... Frame, 22, 22 '... Drive motor, 23, 23' ...... Output shaft, 24, 24 '…… Arm, 26 …… Opening / closing element (roller), 16 …… Hopper gate opening / closing device

Continuation of front page (56) Reference JP 62-249018 (JP, A) JP 62-90515 (JP, A) JP 61-44328 (JP, A) JP 61-71323 (JP , A) Actual development Sho 59-54823 (JP, U) Actual public 39-30030 (JP, Y1)

Claims (1)

[Claims] 1. A gate opening / closing device for a hopper, which is provided with a gate at a discharge port of the hopper and is provided with a link mechanism for opening / closing the gate in response to an operating force from the motor, wherein the output shaft of the motor is provided with a lateral opening. A motor provided with an arm, an opening / closing element attached to an end of the arm, and an operating section for operating the link mechanism; The hopper gate opening / closing device of the automatic weighing device, wherein the opening / closing member is selectively brought into contact with one of the operation parts of the plurality of link mechanisms by rotating the opening / closing part in the normal direction.