JP2000111395A - Automatic metering machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic metering machine in which the electrostatic charge, of a granular or powdery product such as sugar or the like, generated during the conveyance of the product is suppressed at low costs and in which the product is not scattered when it is charged into a packaging bag. SOLUTION: Faces which come into contact with an object X, to be metered, on a dispersion table 5, excitation-type troughs 6,...6, pool hoppers 7,...7, metering hoppers 8,...8, a feed conveyor 9, a gathering chute 10 and a discharge chute 11 are coated with a coating material composed of polyphenylene sulfide whose coefficient of dynamic friction is small and which comprises an insulating property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic weighing machine for transporting articles from a supply section to a discharge section via a weighing section, and belongs to the field of automatic weighing technique for articles.

[0002]

2. Description of the Related Art Generally, an automatic weighing machine for measuring the weight of an article includes a trough in which the article is supplied from an article supply section, a hopper to which the article is supplied by the trough, or an article supplied by the hopper. A chute or the like for temporarily storing the article is provided.

When the weight of the article is measured, the article may be put into a packaging bag. If the article is in a particulate or powder form, the article may be placed on the surface of the member. The amount of articles to be put in, such as being smaller than the quantity of articles to be put in due to partial adhesion, or being larger than the quantity of articles to be put in by mixing the attached articles in the next supply In some cases, there is a problem that an error occurs between the number of articles to be actually packaged. To solve this problem, a coating material such as Teflon is usually applied to the surface of the member such as the trough so that the article is hardly attached to the surface.

[0004]

For example, when the above-mentioned article is sugar, as shown by a solid line in FIG. 2, when the sugar is to be put into a packaging bag, the sugar is scattered and an accurate amount of sugar is packaged. There was a problem that it was not put into the bag. The following can be considered as the reason for this.

That is, while the sugar particles are being conveyed on the member, the sugar particles rub against the surface of the member, so that static electricity is generated in the sugar particles and the particles are charged. When the bag is charged with the same kind of charge as the above-mentioned sugar particles during the manufacturing process or set at a predetermined position, etc. It is conceivable that repulsion acts between the bag and the bag.

[0006] Further, the members such as the trough vibrate to convey the sugar, and static electricity is generated in the members due to such vibrations and the like, and the static electricity moves to the sugar particles to be charged. As a result, it is conceivable that a repulsive force acts on the charged packaging bag as described above.

[0007] Such a problem is not limited to sugar, and there is a concern that it may occur in other particulate or powdery articles.

In order to solve the problem of static electricity, it is conceivable to provide a device such as a humidifier near the above-mentioned member so as to make the sugar less likely to be charged. Since it becomes large, a large space for installing the device is required,
The cost will be greatly increased, and the humid condition as described above is not very hygienic.

Therefore, the present invention relates to an automatic weighing machine,
An object of the present invention is to suppress charging of an article in a particulate or powder form such as sugar during transportation of the article at a low cost so that the article is not scattered when put into a packaging bag.

[0010]

That is, the present invention is characterized by having the following configuration to solve the above-mentioned problems.

First, an invention according to claim 1 (hereinafter, referred to as a "first invention") is an automatic weighing method in which a weight of an object to be weighed supplied from a supply unit is measured in a weighing unit and then discharged to a discharge unit. In the machine, a coating material is applied to a member constituting a path of the object to be weighed from the supply unit to the discharge unit, so that the object to be weighed is less likely to be charged by passing the object to be weighed through the member. It is characterized by.

Next, according to a second aspect of the present invention (hereinafter referred to as a "second invention"), a dispersion table installed via a vibration device and a vibration device around the dispersion table are provided. A plurality of troughs that are radially disposed through and are supplied with the objects to be weighed from the dispersion table, and a plurality of hoppers that are disposed circularly below the troughs and are supplied with the objects to be weighed from the troughs, In a combination type automatic weighing machine having a chute for collecting the objects to be weighed discharged from the hopper corresponding to the optimal combination, the dispersion table,
The trough, the hopper, and the chute are characterized by being coated with a coating material that does not easily charge the object to be weighed when the object passes through these members.

According to a third aspect of the present invention (hereinafter referred to as a "third invention"), the weight of an object to be weighed supplied from a supply unit is measured in a weighing unit, and then discharged to a discharge unit for packaging. An automatic weighing machine for putting into a bag, wherein the object to be weighed is different from the packaging bag when the object to be weighed passes through a member constituting a path of the object to be weighed from the supply section to the discharge section. It is characterized in that a coating material to be charged to a polarity is applied.

The invention according to claim 4 (hereinafter referred to as "the invention")
This is referred to as a "fourth invention." ) Is a dispersion table provided via a vibration device, and a plurality of troughs which are radially disposed around the dispersion table via the vibration device and to which the objects to be weighed are supplied from the dispersion table. A combination type having a plurality of hoppers arranged circularly below the trough, to which the objects to be weighed are supplied from the troughs, and a chute for collecting the objects to be weighed discharged from the hoppers corresponding to the optimal combination. An automatic weighing machine, wherein a coating material is applied to the dispersion table, the trough, the hopper, and the chute so that the object to be weighed has a different polarity from the packaging bag when the object passes through these members. It is characterized by the following.

The invention according to claim 5 (hereinafter referred to as "fifth invention") is characterized in that in any one of claims 1 to 4, the weight of sugar is measured.

The invention according to claim 6 (hereinafter referred to as the invention)
This is referred to as a "sixth invention." ) Is characterized in that in claim 1 or claim 2, the coating material has a small dynamic friction coefficient.

Next, a seventh aspect of the present invention (hereinafter referred to as a "seventh aspect") is characterized in that, in the first or second aspect, the coating material has an insulating property.

The invention according to claim 8 (hereinafter referred to as the invention)
This is referred to as an "eighth invention." ) Is characterized in that, in claim 1 or claim 2, the coating material has a low dynamic friction coefficient and an insulating property.

According to a ninth aspect of the present invention (hereinafter referred to as a "ninth aspect"), the coating material is a polyphenylene sulfide.

According to the first to ninth aspects, the following effects can be obtained.

First, according to the automatic weighing machine of the first invention, the weighing object is passed through the member constituting the path of the weighing object from the supply section to the discharge section. Since the coating material that is less likely to be charged is applied, the object to be weighed is less likely to be charged, and the object to be weighed is surely charged in a predetermined amount without being scattered when placed in a packaging bag. Can be.

Next, according to the automatic weighing machine of the second invention, the coating material on the dispersion table, the trough, the hopper, and the chute is less likely to be charged by the material to be weighed when the material passes through these members. Is applied, the object to be weighed is less likely to be charged, and a predetermined amount of the object to be weighed can be reliably introduced without being scattered when the object to be weighed is put into a packaging bag.

According to the automatic weighing machine of the third invention, the object to be weighed is passed through the member constituting the path of the object to be weighed from the supply section to the discharge section. Since the coating material for charging the packaging bag with a different polarity is applied, the object to be weighed is charged with a different polarity from the packaging bag. Therefore, it is possible to reliably supply a predetermined amount of the object to be weighed without scattering the object to be weighed when the container is put into the packaging bag.

According to the automatic weighing machine of the fourth invention,
Since the object to be weighed passes through these members on the dispersion table, the trough, the hopper, and the chute, a coating material that charges the object to be weighed with a different polarity from the packaging bag is applied. It will be charged to a different polarity. Therefore, it is possible to reliably supply a predetermined amount of the object to be weighed without scattering the object to be weighed when the container is put into the packaging bag.

According to the automatic weighing machine of the fifth invention, since the automatic weighing machine measures the weight of the sugar, the charge of the sugar is prevented, and the sugar is scattered when the sugar is put into the packaging bag. Can be avoided.

According to the automatic weighing machine of the sixth invention,
The coating material has a low dynamic friction coefficient. That is, as one of the causes of the electrification of the object to be weighed, friction between the object to be weighed and each of the above-mentioned members is considered. It is designed to reduce friction. Thereby, it is possible to greatly suppress the particles of the object to be measured from being charged due to friction with the surface of each of the above-mentioned members, and the repulsive force acting between the particles and the packaging bag becomes very small, so that a predetermined amount of sugar Can be surely put into the packaging bag with almost no scattering.

Next, according to the automatic weighing machine of the seventh invention, the coating material has an insulating property. In other words, as one of the causes of charging of the object to be weighed, it is conceivable that static electricity generated in each of the above members due to vibration or the like moves to the object to be weighed and charges the object to be weighed. Try to hardly move to the thing. Accordingly, it is possible to greatly suppress the static electricity generated in each of the above members from being charged by moving to the particles of the object to be weighed, and the repulsive force acting between the member and the packaging bag becomes very small. The object to be weighed can be surely put into the packaging bag without scattering.

According to the automatic weighing machine of the eighth invention,
The coating material has a small dynamic friction coefficient and has insulating properties. In other words, since the friction between the object to be weighed and each of the above-mentioned members is considered as a cause of charging of the object to be weighed, the friction coefficient of the contact surface of each of the above-mentioned members with the object to be weighed is reduced to reduce the friction. Since it is considered that static electricity generated in each of the above-mentioned members due to vibration or the like is moved to the weighing object and the weighing object is charged, the contact surface between the above-mentioned respective members and the weighing object is considered. The object to be weighed is electrically insulated. Accordingly, it is possible to greatly suppress the particles of the weighing object from being charged due to friction with the surface of each of the above members, and the static electricity generated in each of the above members is charged by moving to the particles of the weighing object. Can be greatly suppressed, and the repulsive force acting between the packaging bag and the packaging bag becomes very small, so that a predetermined amount of the object to be weighed can be surely put into the packaging bag without scattering. .

Further, according to the automatic weighing machine of the ninth aspect, the coating material is polyphenylene sulfide.
Since the polyphenylene sulfide has a small coefficient of friction and an insulating property, it suppresses charging due to friction with the surface of each member and charging due to static electricity generated in each member moving to particles of the object to be weighed. Can be.

[0030]

Embodiments of the present invention will be described below.

FIG. 1 is a schematic front view showing the entire structure of an automatic weighing machine according to the present invention. A base 3 having an opening (not shown) at the center is installed on a base 2 of the automatic weighing machine 1. The base 3 is provided with a support 4 supported on the base 3 via support mounts 3a... 3a. This support 4
On the upper surface of the table, a vibration-type dispersion table 5 installed in the center
And a plurality of vibrating troughs 6... 6 arranged radially around the dispersion table 5, and on the peripheral surface of the support base 4, corresponding to the troughs 6. A plurality of upper and lower pool hoppers 7... 7 and weighing hoppers 8. A supply conveyor 9 for supplying the object X to be weighed from above the dispersion table 5 is provided.
Is supplied to the weighing hoppers 8... 8 via the pool hoppers 7... 7, where the weights are weighed and the combination calculation is performed. It has become.

Below the weighing hoppers 8, a collecting chute 10 which is supported by the base 3 via chute supporting portions 3b, 3b and has a wide open upper end so as to form a funnel shape as a whole. A discharge chute 11 having a discharge port 11a at a lower end is disposed below the collecting chute 10 so that the objects X to be weighed discharged from the weighing hoppers 8... Slides down the collecting chute 10 and the discharging chute 11,
Collective discharge is performed from the discharge port 11a at the lower end.

Below the discharge chute 11,
A charging member 12 is provided. The charging member 12 receives the object X to be weighed discharged from the discharge port 11 a of the discharge chute 11, and enters the packaging bag Y prepared in the packaging device 13. A fixed quantity of the object X to be weighed is supplied into the packaging bag Y.

In addition to the above configuration, in the embodiment of the present invention, the distribution table 5, the vibrating trough 6,.
6, coating hoppers 7... 7, weighing hoppers 8.

As the coating material, polyphenylene sulfide (trade name "Lighty", Philips Petrolium) was used. Table 1 shows the dynamic friction coefficient, and Table 2 shows the electrical insulation.

[0036]

[Table 1]

[0037]

[Table 2] Thus, this polyphenylene sulfide is shown in Table 1.
As shown in Table 2, the kinetic frictional resistance is small, and as shown in Table 2, high insulating properties are exhibited.

Thus, the friction between the contact surface of each of the members 6 to 11 and the object to be weighed can be reduced, and the contact surface of each of the members 6 to 11 with the object to be weighed and the object to be weighed can be reduced. It is very difficult for electricity to flow in between.

Therefore, it is possible to greatly suppress the charging of the sugar particles due to friction with the surface of each of the above-mentioned members, and it is also possible to prevent the static electricity generated in each of the above members from being charged by moving to the sugar particles. Can be greatly suppressed, and the repulsive force acting between the packaging bag and the packaging bag becomes very small, so that a predetermined amount of sugar can be reliably introduced into the packaging bag with almost no scattering.

[0040]

First, according to the automatic weighing machine of the first invention,
The member constituting the path of the object to be weighed from the supply unit to the discharge unit is coated with a coating material that does not easily charge the object to be weighed by passing the object to be weighed through the member. It becomes difficult to be charged, and a predetermined amount of the object to be weighed can be surely introduced without scattering the object to be weighed when the object is put into the packaging bag.

Next, according to the automatic weighing machine of the second invention, the coating material on the dispersion table, the trough, the hopper, and the chute is less likely to be charged by the material to be weighed when the material passes through these members. Is applied, the object to be weighed is less likely to be charged, and a predetermined amount of the object to be weighed can be reliably introduced without being scattered when the object to be weighed is put into a packaging bag.

According to the automatic weighing machine of the third invention, the object to be weighed is passed through the member constituting the path of the object to be weighed from the supply section to the discharge section. Since the coating material for charging the packaging bag with a different polarity is applied, the object to be weighed is charged with a different polarity from the packaging bag. Therefore, it is possible to reliably supply a predetermined amount of the object to be weighed without scattering the object to be weighed when the container is put into the packaging bag.

According to the automatic weighing machine of the fourth invention,
Since the object to be weighed passes through these members on the dispersion table, the trough, the hopper, and the chute, a coating material that charges the object to be weighed with a different polarity from the packaging bag is applied. It will be charged to a different polarity. Therefore, it is possible to reliably supply a predetermined amount of the object to be weighed without scattering the object to be weighed when the container is put into the packaging bag.

Further, according to the automatic weighing machine of the fifth invention, the automatic weighing machine measures the weight of the sugar, so that the charging of the sugar is prevented, and the sugar is scattered when the sugar is put into the packaging bag. Can be avoided.

According to the automatic weighing machine of the sixth invention,
The coating material has a low dynamic friction coefficient. That is, as one of the causes of the electrification of the object to be weighed, friction between the object to be weighed and each of the above-mentioned members is considered. It is designed to reduce friction. Thereby, it is possible to greatly suppress the particles of the object to be measured from being charged due to friction with the surface of each of the above-mentioned members, and the repulsive force acting between the particles and the packaging bag becomes very small, so that a predetermined amount of sugar Can be surely put into the packaging bag with almost no scattering.

Next, according to the automatic weighing machine of the seventh invention, the coating material has insulating properties. In other words, as one of the causes of charging of the object to be weighed, it is conceivable that static electricity generated in each of the above members due to vibration or the like moves to the object to be weighed and charges the object to be weighed. Try to hardly move to the thing. Accordingly, it is possible to greatly suppress the static electricity generated in each of the above members from being charged by moving to the particles of the object to be weighed, and the repulsive force acting between the member and the packaging bag becomes very small. The object to be weighed can be surely put into the packaging bag without scattering.

According to the automatic weighing machine of the eighth invention,
The coating material has a small dynamic friction coefficient and has insulating properties. In other words, since the friction between the object to be weighed and each of the above-mentioned members is considered as a cause of charging of the object to be weighed, the friction coefficient of the contact surface of each of the above-mentioned members with the object to be weighed is reduced to reduce the friction. Since it is considered that static electricity generated in each of the above-mentioned members due to vibration or the like is moved to the weighing object and the weighing object is charged, the contact surface between the above-mentioned respective members and the weighing object is considered. The object to be weighed is electrically insulated. Accordingly, it is possible to greatly suppress the particles of the weighing object from being charged due to friction with the surface of each of the above members, and the static electricity generated in each of the above members is charged by moving to the particles of the weighing object. Can be greatly suppressed, and the repulsive force acting between the packaging bag and the packaging bag becomes very small, so that a predetermined amount of the object to be weighed can be surely put into the packaging bag without scattering. .

According to the ninth aspect of the present invention, the coating material is polyphenylene sulfide.
Since the polyphenylene sulfide has a small coefficient of friction and an insulating property, it suppresses charging due to friction with the surface of each member and charging due to static electricity generated in each member moving to particles of the object to be weighed. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an entire configuration of an automatic weighing machine according to an embodiment of the present invention.

FIG. 2 is a diagram showing a conventional problem.

[Explanation of symbols]

 5 Dispersion table 6 ... 6 Exciting trough 7 ... 7 Pool hopper 8 ... 8 Weighing hopper 9 Supply conveyor 10 Collecting chute 11 Discharge chute 12 Input member 13 Packaging device Y Packaging bag

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hisashi Mohri F-term (reference) 2F046 BB03 FA06 3F075 AA07 BA01 CA06 CA09 CB01 CB14 CC01 CD01 DA08 at 959 Shimogaku, Ritto-cho, Kurita-gun, Shiga

Claims (9)

[Claims] 1. An automatic weighing machine for measuring the weight of an object to be weighed supplied from a supply unit at a weighing unit and then discharging the weighed object to a discharge unit, wherein the automatic weighing machine constitutes a path of the object to be weighed from the supply unit to the discharge unit. An automatic weighing machine characterized in that a coating material is applied to a member to be weighed so that the weighed object is unlikely to be charged when the weighed object passes through the member. 2. A dispersing table installed via a vibrating device, and a plurality of dispersing tables which are radially arranged around the dispersing table via a vibrating device, and to which objects to be weighed are supplied from the dispersing table. A combination having a trough, a plurality of hoppers arranged in a circle below the trough, to which the objects to be weighed are supplied from the troughs, and a chute for collecting the objects to be weighed discharged from the hopper corresponding to the optimum combination An automatic weighing machine of the type, wherein the dispersion table, trough,
An automatic weighing machine, characterized in that a coating material is applied to the hopper and the chute so that the weighed object is less likely to be charged when the weighed object passes through these members. 3. An automatic weighing machine that measures the weight of an object to be weighed supplied from a supply unit in a weighing unit, and then discharges the weighed object to a discharge unit and puts it into a packaging bag. An automatic weighing machine, characterized in that a coating material is applied to a member constituting a path of a weighing object so that the weighing object passes through the member to charge the weighing object with a polarity different from that of the packaging bag. 4. A dispersing table installed via a vibrating device, and a plurality of dispersing tables arranged radially around the dispersing table via a vibrating device, respectively, to which the objects to be weighed are supplied from the dispersing table. A combination having a trough, a plurality of hoppers arranged in a circle below the trough, to which the objects to be weighed are supplied from the troughs, and a chute for collecting the objects to be weighed discharged from the hopper corresponding to the optimum combination An automatic weighing machine of the type, wherein the dispersion table, trough,
An automatic weighing machine, wherein a coating material is applied to a hopper and a chute to charge the object to be weighed in a different polarity from that of a packaging bag when the object passes through these members. 5. The automatic weighing machine according to claim 1, wherein the weight of the sugar is measured. 6. The automatic weighing machine according to claim 1, wherein the coating material has a small dynamic friction coefficient. 7. The automatic weighing machine according to claim 1, wherein the coating material has an insulating property. 8. The automatic weighing machine according to claim 1, wherein the coating material has a small dynamic friction coefficient and an insulating property. 9. The automatic weighing machine according to claim 6, wherein the coating material is polyphenylene sulfide.