JPH0535975B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a weighing device for weighing products continuously supplied from a conveyor or the like.

(Prior art) Generally, in the manufacturing process of cosmetics, foods, drugs, etc.
After filling containers, small boxes, etc. with the contents, they undergo quality inspections such as weight before being shipped.

Such a weight inspection device is required to be capable of continuously weighing products since the products are sequentially supplied from a conveyor.

Conventionally, Japanese Patent Laid-Open No. 178220/1983 (Weighing Conveyor) has disclosed a weighing device for weighing the weight continuously supplied from a conveyor.

This prior art weight inspection device is shown in FIG. 5 and will be described.

In the figure, reference numeral 1 denotes a weighing conveyor consisting of a conveyor 2 and a weighing device 3. A weighing device is disposed at the lower end of the belt on the container conveying surface side of the conveyor 2 to support the weight of the containers on the conveyor. The weight of 6 containers is measured while being transported.

Further, conveyors 4 and 5 are installed in series at both ends of the weighing conveyor 1, and the weight of the containers is continuously measured by transferring the containers 6 one by one to the weighing conveyor 1. .

Also, JP-A-57-111417 and JP-A-60-
Japanese Patent No. 2488 discloses a filling device equipped with a weight measuring device. These devices consist of a rotary filling device equipped with a plurality of filling stations each having a weighing scale, an upstream transfer rotary table that supplies empty containers to each filling station, and a downstream transfer rotary table that takes out filled containers. The upstream and downstream transfer rotary tables each have a notch that matches the outer shape of the container, and are so-called star wheels that receive and transport the container in the notch.

(Problems to be Solved by the Invention) However, the weight inspection device disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 178220/1980 has a conveyor 2 of the weighing conveyor 1, a conveyor 4 connected thereto, Because a recess is created at the butt part with 5,
When the containers 6 are transferred to the conveyor, they tend to fall over, and the containers 6 cannot be carried in and out of the weighing conveyor 1 smoothly.

This relationship is illustrated in FIG. 6. As shown in the figure, the radius dimension (CL) of the bottom surface of the container 6, which is the object to be weighed, is smaller than the concave dimension (TL) of the abutting portion of the conveyors 4 and 5. In this case, when the container 6 is transferred to the weighing conveyor 1, it falls over. For this reason, the weighing device could not be used for these containers.

Therefore, in order to solve this problem, knife edge conveyors are used for the weighing conveyor 1 and the conveyors 4 and 5 before and after the weighing conveyor 1, and the rollers of the conveyors are There is a device in which the radius of the recess is made as small as possible, but in this device, the belt must be made extremely thin to fit the knife edge conveyor, and as the roller diameter becomes smaller, bending becomes more difficult. There was a problem that the life of the belt was shortened due to fatigue.

Also, when incorporating an inspection process into an existing line,
With conventional equipment, it is necessary to divide the existing conveyor into two parts, shorten the length of the conveyor, and insert a weighing device between them, which requires extensive modification of the existing conveyor, which increases costs. There was a problem in that the construction required a considerable number of days and the operating line had to be shut down for a long period of time.

In addition, the above-mentioned Japanese Patent Application Laid-Open No. 57-111417 and
In the filling device disclosed in Publication No. 60-2488, when the external shapes of the containers to be filled are diverse, upstream and downstream transfer rotary tables are prepared according to the external shapes of each container. However, there were problems in that it required replacement work and increased equipment costs.

The present invention has been made in view of the above-mentioned drawbacks of the prior art. To provide a weight measuring device which can be installed alongside an existing conveyor without requiring modification when installing it on an existing conveyor, while minimizing the time required for weighing.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a supply conveyor that supplies containers at regular intervals, and a weighing device that measures the weight of the containers installed horizontally on the supply conveyor. , a transfer means for transferring the containers on the supply conveyor onto the weighing device, and discharging the containers onto the supply conveyor after weighing; It consists of a rotary table having a surface for placing objects to be weighed at the same height as the conveyance surface, and a drive means for rotating the rotary table, and the transfer means transfers the containers on the supply conveyor onto the weighing device. It consists of a supply means for transferring, and a discharge means for discharging the containers to be weighed on the weighing device onto the supply conveyor, and the supply means and discharge means are constructed on the supply conveyor and a rotary table, and the supply conveyor The gist is that it consists of a guide or belt-type drive feeder that can be installed at any angle.

In this configuration, it is more preferable to provide a roller that comes into contact with the lower surface of the rotary table and supports the rotary table.

(Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In the figure, reference numeral 7 denotes a supply conveyor, which is a flat belt conveyor and conveys the containers 6 in the direction shown at a constant speed. Reference numeral 8 denotes a weighing device, which is installed next to the supply conveyor 7 so that the upper surface of the weighing section 13 of the weighing device 8 is at the same height as the conveyance surface of the supply conveyor 7.

As shown in FIG. 3, the weighing device 8 includes a base 9, a weight detector 11 fixedly installed on the base 9 via a vibration-proof rubber 10, and a weight holder 12 of the weight detector 11. It is configured by placing a measuring section 13 thereon.

In the weighing section 13, a motor 15 with a speed reducer is fixedly mounted on an intermediate base 14, and a rotating table 17 on which a container 6 transferred from a conveyor is placed is attached to a rotating shaft 16 of the motor 15. Further, a plurality of support rollers 19 that support the load of the rotary table 17 and are rotatably supported horizontally are pivotally attached to the periphery of the intermediate base 14 via bearing stands 18 fixed to the intermediate base 14. The support roller 19 is configured to come into sliding contact with the periphery of the lower surface of the rotary table 17.

The rotary table 17 is installed so that the position of the container conveying surface is equal to the height of the conveying surface of the supply conveyor 7, so that a horizontal conveying surface with no steps is formed during the container conveying process.

In addition, in order to prevent a load exceeding the rating from being applied to the weight detector 11, a rod-shaped stopper 20 extending downward from the intermediate base 14 is fixed to the intermediate base 14, and the stopper 20 is fixed to the intermediate base 14 when the load is at maximum. It is fixed with a gap corresponding to the maximum allowable strain so that the lower end thereof contacts the base 9.

The intermediate base 14 having the above structure is placed on the weight holder 12 of the weight detector 11.

Further, as the weight detector 11, a known weight detector 11 using a strain gauge (not shown) is used.

Next, reference numeral 21 denotes a supply feeder, and its structure, as shown in FIG. A rotatable pulley 25 with a built-in bearing is fixedly installed at the end.

An endless belt 2 is placed between both pulleys 24 and 25.
6 is stretched, and this is connected to the belt surface 26 by a bolt 27 protruding from the opposite side of the frame 22.
is installed on the supply conveyor 7 perpendicularly to the surface of the supply conveyor 7 and at a constant angle of inclination in the container conveyance direction.

The angle of inclination is rotated around the pulley on the motor 23 side in the direction shown in the figure so that it can be changed arbitrarily depending on the size of the container. Further, on the container contacting surface 28 side of the supply feeder 21, a back plate 29 is provided behind the belt to prevent the belt from bending during container conveyance.

30 is a discharge feeder, and the supply feeder 21
It has the same configuration as shown in the figure, and is arranged above the measuring device 8 so as to be rotated in the direction shown in the figure, and can be changed to any angle with the motor side pulley as the axis.

The supply feeder 21 and the discharge feeder 30 are arranged on the upper surface of the supply conveyor 7 and the rotary table 17 by means of members fixed to the base 9 of the weighing device 8 or the like.

A plate 31 has a shape that matches the shape of the recess between the supply conveyor 7 and the weighing device 8, and is fixed to the base 9 so that they are on the same plane with a certain gap so that there is no contact between them. Ru.

This provides a flat surface with no steps during the process of transferring the containers 6 from the supply conveyor 7 onto the rotary table 17.

Further, 32 is also a plate and has the same structure as the plate 31 described above.

Next, the operation will be explained based on FIGS. 1 to 4.

The explanation will be made assuming that the supply feeder 21, the discharge feeder 30, and the rotary table 17 provided in the weighing device 8 are always rotating in the direction shown in the figure.

Containers 6 sent from the supply conveyor 7 at a constant pitch in the direction shown in the figure sequentially hit the supply feeder 21, and the containers 6 receive the conveyance force in the direction shown in the figure from the supply feeder 21 and the conveyance force in the direction shown in the figure from the supply conveyor 7. The sample is then transferred onto the rotary table 17 of the weighing device 8 via the plate 31. In this case, on the side of the container contacting surface 28 of the supply feeder 21, a back plate 29 is provided behind the belt and parallel to the belt 26, so that the containers 6 conveyed from the supply conveyor 7 are transferred to the belt 28 of the supply feeder 21. This prevents you from falling over due to being repelled by a surface.

The container 6 placed on the rotary table 17 is conveyed to the discharge feeder 30 by the rotation of the rotary table 17, and then discharged onto the supply conveyor 7 by the conveying force of the belt surface of the discharge feeder 30.

Then, the weight of the container 6 is measured while the container 6 is placed on the rotary table 17.

In this case, even if the container 6 is placed on the end of the rotary table 17, the rotary table 17 is supported in sliding contact with the lower part of its outer circumference by the support rollers 19, so that it does not become eccentric. The containers 6 on the rotary table 17 are fed horizontally on the same plane as the supply conveyor 7.
It is placed smoothly without any vibration.

Therefore, the time required for the weight value of the weight detector 11 to stabilize can be shortened, and not only can weighing be completed quickly, but also the accuracy of weighing can be improved by reducing vertical vibration.

Therefore, it can be easily applied to a production line where containers 6 are supplied at a fast rate.

Further, in the above embodiment, plates 31 and 32 were provided between the supply conveyor 7 and the weighing device 8 in order to eliminate the recess, but the supply conveyor of the supply feeder 21 and discharge feeder 30 is By adjusting the mounting angle with respect to 7, the number of recesses can be reduced.

Further, since the container 6 is conveyed by the endless belt 26 that contacts the outer periphery of the container 6, containers 6 having various external shapes can be conveyed.

Next, a second embodiment will be explained based on FIG. 7.

In the drawings, parts that have the same configuration as the first embodiment are given the same numbers and will be explained.

The difference in configuration from the first embodiment is that the supply feeder 21 and the discharge feeder 30 are integrated, and the transfer device 33
and, along with this, rotary table 1
The direction of rotation of the rotary table 17 and the supply conveyor 7 is made to be opposite to each other at the contact portion between the rotary table 17 and the supply conveyor 7. That is, the transfer device 33
The conveyor is driven by a motor and has a substantially triangular shape.The container 6 is placed on the conveyor belt 3 on the conveyor surface side 34, 35 that comes into contact with the container 6.
In order to prevent the belt from falling due to being repelled by the six surfaces, a back plate 22 is installed behind the belt 36 parallel to the belt surface.
22' are provided respectively.

Then, this transfer device 33 is
The belt surface of the conveyor is arranged above the adjacent portion of the supply conveyor 7 and the rotary table 17 so that the surface of the belt 36 of the conveyor comes into contact with the center of the container 6 being conveyed, and the belt surface of the container supply side 34 is arranged above the supply conveyor 7 and the rotary table 17 so that the surface of the belt 36 of the conveyor is in contact with the center of the container 6 being conveyed. On the other hand, the transfer device 33 is arranged so that it forms a predetermined inclination angle, and the discharge side belt surface 35 forms a right angle.

Next, to explain the operation, the containers 6 sent sequentially from the supply conveyor 7 reach the transfer device 33, are conveyed in the illustrated direction along the belt conveyance direction of the transfer device 33, and are conveyed to the supply conveyor. 7 onto the rotary table 17.

Then, the container 6 transferred onto the rotary table 17 reaches the discharge side belt surface 35 of the transfer device 33 by the rotary table 17 rotated in the direction shown in the figure, and the conveyance direction of the belt 36 acts on the container 6. The belt 3 of the supply conveyor 7 is then discharged from the rotary table 17 onto the supply conveyor 7.
6 in the illustrated direction.

Then, while the container 6 is placed on the rotary table 17, the weight of the container 6 is measured.

In the above embodiment, the container is connected to the supply conveyor 7.
In the process of transferring and discharging from the rotary table 17,
Guides 37a, 37b, and 37c may be provided at each transfer portion so that the container can be placed smoothly.

According to this embodiment, only one transfer device 33 is required as a means for supplying and discharging the containers 6, so that the cost of the device can be reduced.

Next, a third embodiment will be explained based on FIG. 8.

This embodiment is based on the supply feeder 21 of the first embodiment.
The discharge feeder 30 is constructed of rod-shaped or plate-shaped guides 38a and 38b with low surface frictional resistance, and the other constructions are the same as in the first embodiment.

That is, in this configuration, the supply feeder 2
1. Even if the discharge feeder 30 is just a guide, since it is installed diagonally with respect to the supply conveyor 7, the container 6 that has reached the guide 38a receives a component of the conveying force of the supply conveyor 7, and the container 6 is moved by the guide 38a. It is transferred onto the rotary table 17 along the following lines.

The same applies to the reverse.

According to this embodiment, since the structure is simple, further cost reduction can be achieved.

Next, a fourth embodiment will be explained based on FIG. 9.

This embodiment shows an example in which the weighing device according to the present invention is applied to a place where the supply conveyor 7 is curved, and the metering device is applied to the supply feeder 21 and the discharge feeder 30.
It can also be applied to such a line by setting the arrangement at an appropriate position.

Next, a fifth embodiment is shown in FIG. 10, which shows an example that can be applied to a line in which a supply conveyor 7 and a discharge conveyor 7' are provided separately, and similarly to the above, the supply feeder 21 and By setting the mounting position of the discharge feeder 30 at an appropriate position as shown in the figure, the measuring device according to the present invention can be applied to any location.

Further, since the containers are guided and transported by a guide or a belt-type drive feeder that contacts the outer periphery of the container, a variety of containers can be transported.

(Effects) As detailed above, the present invention provides the following advantages in the process of carrying in and out of containers from the container supply conveyor to the weighing device.
Since there are no recesses and a smooth conveying surface with little vertical vibration is constructed, it is possible to stably convey and weigh containers that are easily tipped over.

In addition, less vibration on the surface on which the object to be weighed is placed, which shortens the time it takes for the measured value to stabilize when weighing, which enables high-speed weighing and can be applied to processes with fast production pitches. It became.

Furthermore, since the existing conveyor is used as the conveyor for carrying in and discharging articles to be weighed, and the weighing device is installed alongside the existing conveyor, it can be easily integrated into the existing line, reducing modification costs and shortening the construction period. A weighing device can be provided.

Furthermore, since the weighing device is configured to be installed alongside an existing conveyor, it also has the advantage of being able to easily accommodate layout changes.

[Brief explanation of drawings]

1 to 4 relate to the first embodiment of the present application,
FIG. 1 is an overall plan view of this embodiment, FIG. 2 is an explanatory diagram of the operation, FIG. 3 is a front view of the measuring device, and FIG. 4 is a structural diagram of the supply section and the discharge section. 5 and 6 relate to the prior art, FIG. 5 is an overall perspective view of the prior art, FIG. 6 is a behavior diagram when the articles to be weighed are transferred onto the weighing conveyor, and FIGS. 7 to 10 are Other embodiments according to the present invention are shown; FIG. 7 shows the second embodiment, FIG. 8 shows the third embodiment, FIG. 9 shows the fourth embodiment, and FIG. 10 shows the fifth embodiment. 6... Container, 7... Supply conveyor, 8... Measuring device, 13... Measuring section, 17... Rotating table,
21... Supply feeder, 30... Discharge feeder.

Claims (1)

[Scope of Claims] 1. A supply conveyor that supplies containers at regular intervals, a weighing device that weighs the containers placed horizontally on the supply conveyor, and a device that transfers the containers on the supply conveyor onto the weighing device. , a rotating device comprising a transfer means for discharging onto the supply conveyor after weighing, wherein the weighing section of the weighing device has a surface for placing objects to be weighed at the same height as the conveyance surface of the supply conveyor; The transfer means includes a table and a drive means for rotating the rotary table, and the transfer means includes a supply means for transferring the containers on the supply conveyor onto the weighing device, and a supply means for transferring the containers on the weighing device to be weighed. from a guide or belt-type drive feeder, comprising a discharge means for discharging onto a supply conveyor, and the supply means and discharge means are constructed above the supply conveyor and a rotary table, and the construction angle is freely adjustable with respect to the supply conveyor. A weight measuring device characterized by: 2. The weight measuring device according to claim 1, further comprising a roller that comes into contact with a lower surface of the rotary table and supports the rotary table.