JP4747244B2 - Rotary weighing device - Google Patents

Description

  The present invention relates to a rotary weighing device.

Conventionally, the following patent document 1 is known as a rotary container weighing device.
In the invention of Patent Document 1, when the container holding means weighs the container, the container is lowered by a spring to hold the container, and when the container is received or discharged, the container holding means is lifted by a cam to receive the container. Allow discharge. At the time of measurement, the container holding means holds the container so as to oppose centrifugal force, and the cam and the cam follower are measured in a contacted state. With this device, weighing is possible with the container held.
Utility Model Registration No. 2509184 (Fig. 1)

  However, there are cases where a lid is provided on the container lid or the upper surface of the container. In particular, the wrinkles may be hard, and in such hard wrinkled containers, the wrinkles may come into contact with each other as shown in FIG.

Therefore, in the conventional rotary weighing device, the interval between the containers is increased so that the baskets do not contact each other.
However, increasing the spacing between containers makes it difficult to reduce the size of the apparatus. In addition, since the distance between containers is small on the manufacturing side upstream from the weighing, a separate mechanism for separating the distance between the containers before weighing is required, and the conveyance speed of the container is increased in order to widen the distance between the containers. It is necessary to raise.

  Therefore, the main object of the present invention is to provide a rotary weighing device that can accurately measure without increasing the interval between containers by preventing the containers of the containers having the containers from contacting each other during measurement. That is.

  In order to achieve the above object, the rotary weighing device according to the present invention measures the container and / or the contents filled in the container while rotating a plurality of weighing units on which a container with a hook is placed by a rotating means. Each of the weighing units includes a table for placing the container, a container holding means for holding the container on the table, and a weighing instrument loaded with the table and the container holding means. And a contact means for contacting the outer peripheral surface of the container on the table and rotating the container around a vertical axis outside the vicinity of the loading side where the container is loaded into the table.

According to the present invention, the containers are rotated in the same direction along the horizontal plane without using any driving means other than the rotation of the measuring unit only by providing a fixed contact means (guide). Therefore, since contact and overlap between the ridges can be prevented, accurate weighing is possible.
Further, since the containers can be brought close to each other, the interval between adjacent tables can be reduced, so that the apparatus can be miniaturized. In addition, since a separate mechanism for separating the containers is not required, significant cost reduction can be achieved.
Furthermore, the mechanism for separating the containers from each other is simplified, and for example, a star wheel can be used.
In addition, since there is no need to consider the size of the basket, the versatility of the types of containers is widened, and various types of containers can be weighed.

In the present invention, it is preferable to further include a rotation restricting means for restricting the rotation of the container in contact with the cage of the container rotated by the contact means.
According to this aspect, after the container rotates along the horizontal, by providing the rotation restricting member so as not to rotate more than necessary, it is possible to more reliably prevent the overlapping of the ridges.

In the present invention, it is preferable that the rotation restricting means is integrally formed with the container holding means.
According to this aspect, it is not necessary to separately provide rotation restricting means.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the following description, a generally frustoconical container M as shown in FIG. 4 will be described as an example of the container. As shown in FIG. 5, the container M has a hard bag Mh. For example, the bag Mh may be formed on the lid of the container M, or the upper surface of the container M may be formed in a bowl shape. There are cases where the container is filled with the contents and only the container not filled with the contents.

overall structure:
As shown in FIG. 1, an intake-side star wheel 1 and a sorting-side star wheel 3 are provided upstream and downstream of the rotary metering device 2, respectively. The rotary weighing device 2 measures the weight of the contents including the container M or the weight of only the container while conveying the container. In addition, this rotation measuring device 2 may subtract the weight of the container from the weight of the contents including the container M to measure the weight of only the contents.

The rotary weighing device 2 rotates while receiving a container in the supply area A1 from the intake-side star wheel 1 and then measures the container in the weighing area A3 via the stability area A2, and in the downstream area in the discharge area A4. The container is discharged to the star wheel 3. On the other hand, the rotary weighing device 2 continues to rotate, the empty tare weight is measured in the tare weighing area A5, the zero point adjustment is performed, and then the container M is supplied again in the supply area A1.
Each of the star wheels 1 and 3 is a known star wheel.

  As shown in the schematic side view of FIG. 2, the rotary metering device 2 is rotationally driven by a drive device (rotating means) 4 indicated by a broken line. On the other hand, the intake-side star wheel 1 and the sorting-side star wheel 3 are rotated in the reverse direction to the rotation metering device 2 via the pulley 7 and the timing belt 5.

FIG. 3 is a schematic plan view of the rotary weighing device 2.
As shown in FIG. 3, the rotary weighing device 2 is provided with a plurality of weighing units 10 radially about the rotation center O. Each weighing unit 10 is rotated about a rotation center O.

Weighing unit 10:
4 is a cross-sectional view taken along line IV-IV in FIG.
As shown in FIG. 4, each weighing unit 10 includes a table 11 on which a container M is placed and a sheet metal container holding means 20.

  On the rotation center O side of the table 11, a guide 12 is erected in a substantially vertical direction. On the other hand, the sheet metal container holding means 20 is formed in an L-shaped side surface, and a slider 24 is fixed to the base end portion on the rotation center O side. The guide 12 supports and guides the slider 24 slidably in the vertical direction. As the slider 24 slides up and down in the guide 12, the container holding means 20 is moved in the vertical direction. The slider 24 moves up and down between a lower stopper 11 a integrated with the table 11 and an upper stopper 12 a integrated with the guide 12.

  Accordingly, as shown on the left side of FIG. 4, the container holding means 20 has a holding state in which the slider 24 moves downward and the container M can be held between the table 11 and the right side of FIG. As shown, it can be set to a non-holding state in which the slider 24 moves upward and does not hold the container M. In the supply area A1 and the discharge area A4 in FIG. 3, the non-holding state is set, and the supply of the container M to the table 11 and the discharge of the container M from the table 11 are allowed.

  The slider 24 is provided with first maintaining means 21 for maintaining the holding state of the container holding means 20 and second maintaining means 22 for maintaining the non-holding state of the container holding means 20. For example, permanent magnets can be used as the first and second maintaining means 21 and 22. That is, permanent magnets are fixed to the upper and lower portions in the slider 24, respectively. When the container holding means 20 is moved downward, the lower magnet 21 is attracted to the lower stopper 11a integrated with the table 11 made of a magnetic material, whereby the holding state of the container holding means 20 is maintained. On the other hand, when the container holding means 20 is moved upward, the magnet 22 on the upper side of the slider 24 is attracted to the upper stopper 12a of the upper end of the guide 12 made of a magnetic material, so that the non-holding state of the container holding means 20 is maintained. Is done.

Scale 13:
Under each weighing unit 10, a weighing device (load cell) 13 is provided. Each weighing instrument 13 is loaded with a table 11 constituting the weighing unit 10, a container holding means 20, a cam follower 23, and the like. Each weighing device 13 is connected to a control device (not shown), and the weight of the weighing unit 10 and the container M placed on the weighing unit 10 is weighed.

The end of each measuring instrument 13 is fixed to the side surface of the substantially cylindrical first support means 31. When the first support means 31 is rotated by the driving device 4 (FIG. 2), each weighing unit 10 is rotated around the rotation center O.
A rotating plate 30 is fixed to the upper end portion of the first support means 31, and a through hole 35 is formed in the rotating plate 30 so that the rotating plate 30 does not contact the measuring unit 10.

Second support means 32:
Above the first support means 31 and the rotating plate 30, a second support means 32 is fixed in a state of being suspended from a frame (not shown) of the apparatus.

  A cam (original node) 33 is provided below the second support means 32. On the other hand, the container holding means 20 is provided with a cam follower (follower) 23 guided by a cam 33 fixed from above. The cam 33 and the cam follower 23 constitute a main driving portion and a driven portion, respectively. As shown in FIG. 3, the cam 33 and the cam follower 23 are closer to the center of the circumference around which the measuring unit 10 rotates than the table 11. Is provided.

  When each weighing unit 10 is rotated by the first support means 31 of FIG. 4, the cam follower 23 is guided by the cam 33 provided in the second support means 32, so that the container holding means 20 is in the holding state. It moves so that it may be in a non-holding state.

  As shown in FIG. 3, the cam 33 is provided only at two locations, a portion corresponding to the supply area A <b> 1 of the container M and a portion corresponding to the discharge area A <b> 4 of the container M. Therefore, the first and second non-contact areas C1 and C2 where the cam follower 23 is not in contact with the cam 33 exist on the circumference. In the non-contact areas C <b> 1 and C <b> 2, the cam follower 23 is kept away from the cam 33 and is not in contact with the cam 33.

  Here, as shown in FIG. 6A, a rotation guide (contact means) 15 is fixed to a frame (not shown) of the apparatus. As shown in FIG. 6B, the rotation guide 15 is provided below the take-in star wheel 1. In addition, in the top view of FIGS. 6-12, the said rotation guide 15 is displayed with the broken line, and the net pattern is given.

  When the container M shown in FIG. 6 (a) is transferred from the take-in side star wheel 1 onto the table 11, the side surface Ms of the container M comes into contact with the rotation guide 15, and the container M shown in FIG. The container M is rotated about the vertical axis Mo. Therefore, by providing the rotation guide 15, the container M can be rotated in the same direction without using drive means other than the rotation of the weighing unit 10.

  Each weighing unit 10 is provided with a positioning unit 19 that determines the position of the container M on the table 11 with the star wheel 1. The positioning part 19 in FIG. 6A has an arcuate contact surface that contacts the side surface Ms of the container M.

  On the other hand, as shown in FIG. 5, the container holding means 20 is integrally formed with rotation restricting portions 20b and 20c. As shown in FIG. 4, the rotation restricting portions 20b and 20c are formed by bending both ends of the container holding means 20 downward. As shown in FIG. 5, the rotation restricting portions 20 b and 20 c are formed on both the downstream side Sd and the upstream side Su where the container holding unit 20 rotates.

  A pair of rod-like members 26 are formed integrally with the container holding means 20. As shown in FIG. 4, a claw 20 a that engages with the end of the container M is formed at the tip of the rod-shaped member 26. In the holding state, the claw portion 20 a is engaged with the end portion of the container M, whereby the container M is held between the table 11 and the container holding means 20.

  As shown in FIG. 8, the container M rotated by the rotation guide 15 may come into contact with the claw portion 20a and its rotation may be restricted. On the other hand, as shown in FIGS. 10 and 12, depending on the position of the cage Mh of the container M to be rotated, the cage Mh may come into contact with the rotation restricting portions 20 b and 20 c and the rotation thereof may be restricted. Therefore, the claw portion 20a and the rotation restricting portions 20b and 20c constitute a rotation restricting means that abuts against the flange Mh of the container M and restricts the rotation of the container M.

Operation of the rotary weighing device 2:
When the rotating weighing unit 10 reaches the supply area A1, the container M is supplied onto the table 11 in FIG. 3 by the intake-side star wheel 1 in FIG. On the other hand, the container holding means 20 in FIG. 4 is maintained in the non-holding state as shown on the right side of FIG. 4, and after the container M is supplied, the cam follower 23 in FIG. The container M is held.

  As will be described later, the container M is rotated by the rotation guide 15, and the claw portions 20a or the rotation restricting portions 20b, 20c are used to prevent the containers M of the adjacent containers M from contacting each other as shown in FIG. Rotation is regulated.

  By moving the container holding means 20 to the holding state, the magnet 21 on the lower side of the slider 24 in FIG. 4 is attracted to the lower stopper 11a, whereby the holding state of the container holding means 20 is maintained, and the container M is held in the container. It is held between the means 20 and the table 11. Thereafter, when the measuring unit 10 is slightly rotated, the cam follower 23 of FIG.

  Thereafter, the weighing unit 10 in the holding state is further rotated, and after the vibration due to the supply of the container M is stabilized in the stable area A2 of FIG. 3, the weight of the container M is measured by the measuring instrument 13 in the weighing area A3. Is done.

Thereafter, when the weighing unit 10 reaches the discharge area A4, the cam follower 23 comes into contact with the cam 33, the cam follower 23 is guided to the cam 33, and the container holding means 20 is moved from the holding state on the left side in FIG. It becomes a non-holding state.
When the container holding means 20 is in a non-holding state, the container M is discharged by the downstream sorting star wheel 3 (FIG. 1) and conveyed downstream.

In the non-holding state, the magnet 22 on the upper side of the slider 24 is attracted to the upper stopper 12a of the guide 12, so that the non-holding state of the container holding means 20 is maintained. Thereafter, as the weighing unit 10 rotates, the cam follower 23 of FIG. 3 enters a non-contact state in which the cam follower 23 does not contact the cam 33, and the weighing unit 10 advances to the tare weighing area A5.
In the weighing unit 10 where the cam follower 23 is separated from the cam 33, the tare weight in an empty state in which the container M is not placed is measured by the weighing device 13 in the tare weighing area A5, and the zero point is adjusted. Thereafter, the weighing unit 10 is moved again to the supply area A1, and the container M is supplied by the intake-side star wheel 1 (FIG. 1).

  Next, a method for restricting the rotation of the container M will be described for each case based on the position of the ridge Mh of the container M conveyed by the intake-side star wheel 1. In addition, in FIGS. 6-12, the part of 鍔 Mh is shown with the oblique line.

When 鍔 Mh is downstream:
As shown in FIG. 6 (a), when the bowl Mh of the container M conveyed by the intake-side star wheel 1 is positioned from the downstream side rotation restricting portion 20b to the downstream side of the claw portion 20a at the time of supply. Will be described. As shown in FIG. 6 (b), the lower end portion of the downstream rotation restricting portion 20b is located above the upper surface of the ridge Mh.

  As shown in FIG. 7A, when the measuring unit 10 rotates around the rotation center O and transports the container M, the side surface Ms of the container M comes into contact with the rotation guide 15, and the rotation guide 15 The container M is rotated around the vertical axis Mo in FIG.

When the weighing unit 10 further rotates and continues to transport the container M, the container holding means 20 descends and the claw portion 20a holds the upper end of the container M as shown in FIG.
On the other hand, as shown in FIG. 8A, the flange Mh comes into contact with the claw portion 20a on the downstream side, and the rotation of the container M is restricted. Therefore, the jar Mh of the container M is transported in a state of being located on the downstream side where it cannot contact the adjacent jar Mh.

When 鍔 Mh is on the taking-in star wheel 1 side:
As shown in FIG. 9A, the case where the heel Mh is positioned from the claw portion 20a to the upstream side of the upstream rotation restricting portion 20c during supply will be described. As shown in FIG.9 (b), the lower end part of the nail | claw part 20a is located above the upper surface of the collar Mh.

When the weighing unit 10 rotates and continues to transport the container M, the container holding means 20 descends and the claw portion 20a holds the upper end of the container M as shown in FIG.
On the other hand, as shown in FIG. 10A, the bag Mh comes into contact with the upstream rotation regulating portion 20c, and the rotation of the container M is regulated. Therefore, the jar Mh of the container M is conveyed in a state of being located on the upstream side where it cannot contact the adjacent jar Mh.

When 鍔 Mh is upstream:
As shown in FIG. 11A, the case where the ridge Mh is positioned from the upstream side rotation restricting portion 20c to the downstream side of the rotation restricting portion 20b at the time of supply will be described.

When the weighing unit 10 rotates and continues to transport the container M, the container holding means 20 descends and the claw portion 20a holds the upper end of the container M as shown in FIG.
On the other hand, as shown in FIG. 12A, the rod Mh comes into contact with the downstream rotation restricting portion 20b, and the rotation of the container M is restricted. Therefore, the container M is conveyed in the state located in the rotation center side of the measurement unit 10 which cannot contact the adjacent bowl Mh.

  In this way, the container M is rotated by the rotation guide 15 and the rotation is restricted at a predetermined position where the adjacent flanges Mh do not overlap with each other by the claw part 20a or the rotation restriction parts 20b and 20c. It is possible to prevent the lashes Mh from coming into contact with each other regardless of the position at which the lashes Mh are conveyed from the wheel 1 to the weighing unit 10.

Note that the rod-shaped member 26 and the claw portion 20a are not necessarily provided. In such a case, the rotation of the container M is regulated at a position where the adjacent baskets Mh do not come into contact with each other because the basket Mh abuts against the rotation regulating portions 20b and 20c.
Further, the container holding means 20 may be configured by only the rod-like member 26 and the claw portion 20a without providing the rotation restricting portions 20b and 20c. In such a case, the rotation of the container M is regulated at a position where the adjacent ridges Mh do not come into contact with each other by the contact of the ridges Mh with the claw portion 20a.
Furthermore, only one rotation restricting portion 20b (20c) may be provided.

  Further, the rotation restricting means such as the claw portion 20a and the rotation restricting portions 20b and 20c may not be provided. In such a case, the container M is rotated by the rotation guide 15 so that the overlap between the ridges Mh can be eliminated.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
For example, the number of weighing units may be two or more.
It can also be applied when the wrinkle is soft like a film.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.

  The present invention can be applied to a rotary weighing device that measures a container filled with contents while rotating a table that supports the container.

It is a top view which shows the function of the rotary metering apparatus concerning Example 1 of this invention. It is the schematic side view partly fractured | ruptured which shows the rotation measuring device. It is a schematic plan view which shows the principal part of a rotary metering apparatus. It is a schematic sectional drawing which shows the principal part of a rotary metering apparatus. It is a schematic plan view of the measurement unit which shows the state which the ridges of the container contacted. It is the schematic plan view and schematic side view of the weighing unit vicinity. It is the schematic plan view and schematic side view of the weighing unit vicinity. It is the schematic plan view and schematic side view of the weighing unit vicinity. It is the schematic plan view and schematic side view of the weighing unit vicinity. It is the schematic plan view and schematic side view of the weighing unit vicinity. It is the schematic plan view and schematic side view of the weighing unit vicinity. It is the schematic plan view and schematic side view of the weighing unit vicinity.

Explanation of symbols

4: Driving device (rotating means)
10: Weighing unit 11: Table 13: Weighing instrument 15: Rotation guide (contact means)
20: Container holding means 20a: Claw part (rotation restricting means)
20b, 20c: Rotation restricting part (rotation restricting means)
M: Container Mh: Pot

Claims (3)

A rotary weighing device that measures the container and / or the contents filled in the container while rotating a plurality of weighing units on which a container with a hook is rotated by rotating means,
Each weighing unit includes a table for placing the container, container holding means for holding the container on the table, and a weighing instrument loaded with the table and the container holding means,
A rotary weighing device further comprising contact means for contacting the outer peripheral surface of the container on the table and rotating the container around a vertical axis outside the vicinity of the carry-in side where the container is carried into the table.   2. The rotation metering device according to claim 1, further comprising a rotation restricting means that abuts against the bag of the container rotated by the contact means and restricts the rotation of the container.   The rotation metering device according to claim 2, wherein the rotation restricting means is integrally formed with the container holding means.

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