JP2018141680A - Weighing apparatus - Google Patents

Abstract

A weighing apparatus capable of accurately weighing an object to be weighed while being conveyed by a conveyor is provided. A measuring device according to the present invention includes a rotary conveying unit that rotates and conveys a measurement object along an annular path formed around two axes at a predetermined interval, and a straight line passing through the two axes. Conveying means 20 having a reciprocating movement part 30 for reciprocating the entire rotation conveying part 22 by a predetermined distance, and having a conveying conveyor stop area where the measurement object stops at a part of the annular path 28, and the annular path The main surface is arranged in a direction substantially perpendicular to the transport direction by attaching a plurality of the same to the transporting direction at 28, and the main surface is contacted with the main surface from the back side of the measurement target to the transport direction and the measurement target is pushed out and transported. An auxiliary bar 40 to be measured, a weighing means 50 for weighing the stopped weighing object, the weighing object stopped in the conveying conveyor stop area, and the auxiliary bar 4 provided below the conveying conveyor stop area. And release means 60 for releasing the contact, characterized by comprising a. [Selection] Figure 1

Description

  The present invention particularly relates to a weighing device for weighing an object to be weighed while being conveyed on a conveyor in a production line for food, medicine, and the like.

In the process of manufacturing food, medicine, etc., there is a step of measuring the weight whether or not an appropriate weight is satisfied.
In various production lines, the speed of transport conveyors is increasing in order to improve productivity. If the weighing object being transported is stopped at the time of weighing, accurate weighing can be performed, but it is against the speed of the manufacturing line. It was.

  Therefore, the weighing device disclosed in Patent Document 1 suppresses the vibration of the horizontal belt conveyor, the load cell that measures the weight acting when the weighing object passes through the horizontal belt conveyor, and the horizontal belt conveyor while the roller conveyor is being conveyed. The anti-vibration shoe that measures the weight at high speed without stopping the movement of the object to be weighed.

JP 2002-277309 A

  However, the roller conveyor for conveyance of Patent Document 1 has a configuration in which the conveyance line is one row, and the weighing objects are measured one by one with a load cell arranged in the middle of the line, and a plurality of load cells are arranged in series. Thus, it is impossible to measure a plurality of objects to be measured simultaneously.

In addition, because only one object to be weighed must be transported on the load cell belt conveyor, the load cell belt conveyor transport speed must be higher than the transport speed of the front and rear roller conveyors. In other words, the measurement time is extremely short, and the measurement accuracy may be impaired.
Also, when weighing a container with a small filling amount with a belt conveyor for a load cell provided in the middle of a roller conveyor, it may be difficult to measure with high accuracy due to the influence of slight vibration that cannot be damped.

  In addition, when the objects to be weighed are transferred between the roller conveyor for conveyance and the belt conveyor for the load cell, if the distance between the objects to be weighed becomes uneven due to slip or the like, the object to be weighed on the belt conveyor for the load cell There is a possibility that there is more than one and cannot be measured. For this reason, the conveying speed of the belt conveyor for load cells is increased, and there is a possibility that the measurement accuracy is impaired.

  In view of the above-mentioned problems of the prior art, an object of the present invention is to provide a weighing device capable of accurately weighing an object to be measured being conveyed on a conveyor.

In order to solve the above-mentioned problem, as a first means, the present invention includes a rotation conveyance unit that rotates and conveys a measurement object along an annular path formed around two axes at a predetermined interval, and a straight line that passes through the two axes. A reciprocating unit that reciprocates the entire rotational conveying unit by a predetermined distance along a conveying unit provided with a conveying conveyor stop area where the measurement object is stopped at a part of the annular route, and the annular route, etc. Auxiliary bars that are attached to a plurality of intervals and have a main surface arranged in a direction substantially perpendicular to the conveying direction, and are brought into contact with the main surface from the back side of the weighing object with respect to the conveying direction to extrude and convey the weighing object. And a measuring means for measuring the stopped weighing object, and a releasing means for releasing the contact between the weighing object stopped in the conveying conveyor stop area and the auxiliary bar. The invention is to provide a weighing apparatus characterized by comprising.
According to the first means, a conveyance conveyor stop area can be formed in a part of the circular path during conveyance. In this area, the contact between the weighing object and the auxiliary bar is released to accurately place the weighing object. Can be weighed.

In order to solve the above-mentioned problem, as a second means, the present invention is the first means, wherein the releasing means releases the contact of the weighing object after stopping the auxiliary bar in the conveyance conveyor stop area. It is another object of the present invention to provide a weighing device that is a control unit that moves in the transport direction or in the direction opposite to the transport direction.
According to the second means, it is possible to easily release the contact between the weighing object and the auxiliary bar at the time of stopping in the conveyor stop area by controlling the speed of the conveying means.

In order to solve the above-mentioned problem, as a third means, the present invention is the first means, wherein the release means blows air onto the weighing object in a conveyance conveyor stop area and on the weighing pan of the weighing means. An object of the present invention is to provide a weighing device that is an air supply means that moves.
According to the third means, it is possible to quickly release the contact between the weighing object and the auxiliary bar at the stop time in the conveyor stop area.

In order to solve the above-mentioned problem, as a fourth means, the present invention is the first means, wherein the releasing means comes into contact with the weighing object from the front side or the back side in the conveyance conveyor stop area. It is another object of the present invention to provide a weighing apparatus that is a press bar that is moved on a weighing pan.
According to the fourth means, it is possible to quickly release the contact between the weighing object and the auxiliary bar at the time of stopping in the conveyor stop area.

According to the weighing device of the present invention, since weighing can be performed while the weighing object is stopped in the circular path, highly accurate weighing data can be obtained.
In addition, since a stop area is provided in a part of the conveyor and weighs it, and the entire conveyor is being continuously transported, the production line can be speeded up.
In addition, a plurality of objects to be measured can be measured while the conveyance conveyor stop area is stopped, and the measurement time during the stop can be set to be long so that accurate measurement can be realized.

It is a top view of the weighing device of the present invention. It is a side view of the weighing device of the present invention. It is explanatory drawing 1 of the timing chart of a conveyance means. It is explanatory drawing of an auxiliary bar. It is explanatory drawing of a measurement means. It is explanatory drawing 1 of a cancellation | release means. It is explanatory drawing 2 of a cancellation | release means. It is explanatory drawing 2 of the timing chart of a conveyance means. It is explanatory drawing of the cancellation | release means of the modification 1. FIG. 9 is an explanatory diagram 1 of an operation of a release unit according to Modification 1; FIG. 10 is an operation explanatory diagram 2 of a release means of Modification 1; It is explanatory drawing of the cancellation | release means of the modification 2. FIG. 9 is an operation explanatory diagram 1 of a release unit according to Modification 2; FIG. 10 is an operation explanatory diagram 2 of a release means of Modification 2;

Embodiments of the weighing device of the present invention will be described below in detail with reference to the accompanying drawings.
The weighing object 12 that can be weighed by the weighing device of the present invention may be a single product, a container such as a bottle / cup filled with contents, etc., as long as it can be conveyed by a conveyor.

[Weighing device 10]
FIG. 1 is a plan view of the weighing device of the present invention. FIG. 2 is a side view of the weighing device of the present invention. As shown in the figure, the weighing device 10 of the present invention can be attached along the transport direction on the side of the main transport conveyor 14 of the production line. The weighing device 10 is provided with a supply star wheel 16 and a discharge star wheel 18 at a predetermined interval from the supply star wheel 16 at a location close to the separation star wheel 15 of the main transfer conveyor 14. The supply star wheel 16 is a wheel that sets the same speed as the transport speed of the main transport conveyor 14 and supplies the weighing object 12 from the main transport conveyor 14 to the transport means 20. The discharging star wheel 18 is a wheel that sets the same speed as the conveying speed of the main conveying conveyor 14 and discharges the weighing object 12 from the conveying means 20 to the main conveying conveyor 14.

[Conveying means 20]
The transport unit 20 has a rotary transport unit 22 and a reciprocating unit 30 as the main basic configuration.
The rotary conveyance unit 22 has an annular path 28 that circulates on a horizontal plane by winding two endless chains around the upper and lower sprockets of the two shafts 24 and 26 that are spaced apart from each other. The distance between the two axes 24 and 26 is set according to the size of the measurement object 12 and the quantity of the measurement objects 12 that can be measured at one time. A drive source 29 is attached to one of the two shafts 24 and 26. The drive source 29 of the rotary conveyance unit 22 employs a servo motor that can be controlled to an arbitrary rotational speed. The supply star wheel 16 and the discharge star wheel 18 are attached to one side of the conveyance straight line of the annular path 28 formed around the two shafts 24 and 26.

  The reciprocating unit 30 reciprocates the entire rotary transport unit 22 by a predetermined distance along a straight line passing through the centers of the two axes 24 and 26 of the rotary transport unit 22. The drive source 32 of the reciprocating unit 30 employs a servo motor that can be controlled to an arbitrary reciprocating speed. And the drive sources 29 and 32 of the rotation conveyance part 22 and the reciprocating movement part 30 employ | adopt the structure which became independent separately. A specific configuration of the reciprocating unit 30 includes a lower surface of the rotary conveyance unit 22, a slide unit 34 provided on the base body 31, and a reciprocating drive unit 35.

  The slide portion 34 includes a rail 34a formed on the base body 31 and a slider 34b that slides on the rail 34a below the shaft 26 of the rotary conveyance unit 22. The rail 34a is formed along a straight line passing through the centers of the two axes 24 and 26, and the slider 34b on the rail 34a also reciprocates along this straight line.

  The reciprocating drive unit 35 has a drive source 32 installed on the base body 31 and a screw shaft 36 connected to the drive source below the shaft 24 of the rotary conveyance unit 22, and the screw shaft 36 is rotatable on the base body 31. A bearing 37 to be supported and a nut portion 38 which is screwed onto the screw shaft 36 and attached to the lower surface of the rotary conveyance portion 22 are provided. By rotating the drive source 32 of the reciprocating unit 30 forward and backward at an arbitrary speed, the entire rotary conveyance unit 22 can be reciprocated along a straight line passing through the center of two axes together with the slide unit 34.

FIG. 3 is an explanatory diagram of a timing chart of the conveying means. The conveying means 20 sets the rotational speed of the driving source 29 of the rotary conveying section 22 and the reciprocating speed of the driving source 32 of the reciprocating movement section 30 to different speeds during forward movement and backward movement.
The specific speed of the rotary transport shaft of the rotary transport unit 22 is set to W2 m / min when the reciprocating unit 30 moves forward, and is set to W1 m / min when the reciprocating unit moves backward.
Further, the speed of the reciprocating axis of the reciprocating unit 30 is set to U1 m / min during forward movement and set to -U2 m / min during backward movement.

  At the time of reciprocation on one side (supply / discharge side) of the conveyance straight line of the annular path 28 to which the supply star wheel 16 and the discharge star wheel 18 are attached, the rotational speed of the drive source 29 of the rotary conveyance unit 22 The reciprocating speed of the drive source 32 of the reciprocating movement unit 30 is combined, and the moving speed of the annular path 28 is set to be the same speed Vm / min as the conveying speed of the main conveyor 14.

  On the other hand, at the time of forward movement on the other side (conveying conveyor stop area side) of the conveyance straight line of the annular path 28, the rotational speed of the drive source 29 of the rotary conveyance section 22 and the forward movement speed of the drive source 32 of the reciprocating movement section 30 are As a result of the synthesis, it is canceled out and the speed of a part of the circular path, in other words, the speed of the conveyor stop area becomes zero. As a result, the annular path 28 continuously conveys the measuring object 12 at the speed Vm / min as a whole by canceling the speed zero on the other side of the conveyance straight line of the annular path 28 and Vm / min on the one side.

The annular path 28 is formed with a casing 25 having a concave shape in a cross-sectional view supporting both side surfaces and the bottom surface of the weighing object 12 transported on the path. The casing 25 is provided with an opening 25a on the bottom surface of a portion that overlaps with the conveyor stop area in plan view.
According to such a conveyance means 20, a conveyance conveyor stop area can be formed in a part of the annular path 28 that conveys continuously.

[Auxiliary bar 40]
FIG. 4 is an explanatory view of the auxiliary bar, (1) is a plan view and (2) is a side view. The auxiliary bar 40 is a substantially L-shaped auxiliary member in a plan view that conveys the weighing object 12 on the annular path 28. The auxiliary bar 40 is attached such that one side 40a is attached to an endless chain mounting bracket attached to the upper and lower sprockets of the biaxial shafts 24 and 26, and the other side 40b is spaced from the outer side of the casing 25 by a predetermined distance. A plurality of such auxiliary bars 40 are attached to the endless chain at equal intervals. The interval between the auxiliary bars 40 is set larger than the dimension in which the weighing object 12 can be accommodated.

  A plurality of auxiliary bars 40 having such a configuration are attached to the annular path 28 at equal intervals, and the main surface is arranged in a direction substantially orthogonal to the transport direction, and from the back side of the weighing object 12 with respect to the transport direction. The measuring object 12 can be pushed out and conveyed by contacting the main surface. Further, the auxiliary bar 40 can adjust the angle and shape of the main surface according to the shape of the weighing object. Note that the auxiliary bar 40 of this embodiment is not a member that holds or grips the weighing object 12 but is a member that comes in contact from the back side of the weighing object 12 that moves on the annular path 28.

[Measuring means 50]
The weighing means 50 only needs to be able to weigh the object 12 to be weighed. In the present embodiment, a load cell is adopted as an example and is attached to the conveyor stop area. FIG. 5 is an explanatory view of the weighing means, (1) is a plan view, (2) is a side view, and (3) is a rear view. The weighing means 50 is arranged in series so that a plurality of weighing objects 12 can be individually weighed along the conveyance direction of the annular path 28. As an example, the weighing unit 50 shown in FIG. 1 has a weighing pan 54 and a load cell 52 attached so that twelve objects 12 to be weighed in the area can be weighed.
The weighing means 50 having such a configuration can simultaneously weigh a plurality of weighing objects 12 that are conveyed to the conveyance conveyor stop area and stopped on the weighing pan 54.

[Release means 60]
The releasing means 60 is means for releasing the contact between the weighing object 12 and the auxiliary bar 40 in the conveyance conveyor stop area. The specific release means 60 of the present embodiment is a control unit 62 (shown in FIG. 1) that is electrically connected to the drive source 29 of the rotary transport unit 22 and the drive source 32 of the reciprocating unit 30. The control unit 62 can set the rotational speed of the rotary transport unit 22 and the reciprocating speed of the reciprocating unit 30 to arbitrary speeds.

FIG. 6 is an explanatory diagram 1 of the releasing means. The release means shown in FIG. 6 employs a configuration of a control unit that moves the auxiliary bar in the conveyance direction so that the contact between the auxiliary bar and the weighing object is released after stopping the auxiliary bar in the conveyance conveyor stop area.
Specifically, as shown in FIG. 1A, the weighing object 12 being conveyed through the annular path 28 is pushed out along the conveyance direction by the auxiliary bar 40. At this time, the back surface of the weighing object 12 and the main surface of the auxiliary bar 40 are in contact with each other.

As shown in FIG. 2B, when the auxiliary bar 40 stops in the conveyance conveyor stop area, the weighing object 12 comes into contact with the back surface of the auxiliary bar 40 ahead by the inertial force and the weighing pan 54 of the weighing means 50 is touched. Stop on top.
And as shown in the figure (3), the auxiliary | assistant bar 40 is moved to a conveyance direction so that the contact with the auxiliary | assistant bar 40 and the measuring object 12 may be cancelled | released (several millimeters, for example, 1-10 millimeters). As shown in FIG. 3, the movement of the auxiliary bar 40 is a movement of X millimeters by combining the rotational speed W3 m / min of the rotary transport unit 22 and the reciprocating speed U3 m / min of the reciprocating unit 30 by the control unit. realizable.
Thus, after stopping the auxiliary bar 40 in the conveyance conveyor stop area, the measuring object 12 becomes an object that hinders measurement by moving in the conveying direction so that the contact between the auxiliary bar 40 and the measuring object 12 is released. It is not in contact. In this state, the weighing object 12 is weighed.

Next, as shown in FIG. 4 (4), when the auxiliary bar 40 is moved in the transport direction (forward), the back surface of the weighing object 12 comes into contact with the main surface of the auxiliary bar 40, and the weighing object 12 The bar 40 is extruded along the transport direction and passes through the transport conveyor stop area.
Such a release means 60 is used for measuring in the transport conveyor stop area while maintaining the speed on one side (supply / discharge side) of the transport straight line of the annular path 28 at a constant speed equal to the transport speed of the transport conveyor 14. A gap can be formed between the object 12 and the auxiliary bar 40 to release the contact between the weighing object 12 and the auxiliary bar 40. Accordingly, an error during measurement due to the measurement object 12 and the auxiliary bar 40 being in contact with each other can be prevented, and high accuracy of measurement can be achieved.

Further, the release means 60 can be configured so as to be applied even when the inertial force acting by the above-described transport means 20 is smaller than the frictional force between the measuring object 12 and the ground contact surface.
FIG. 7 is an explanatory diagram 2 of the release means. FIG. 8 is an explanatory diagram 2 of a timing chart of the conveying means. The release means shown in FIG. 7 adopts a configuration of a control unit that moves the auxiliary bar in the direction opposite to the conveyance direction so that the contact between the auxiliary bar and the weighing object is released after stopping the auxiliary bar in the conveyance conveyor stop area. Yes.

Specifically, as shown in FIG. 7 (1), the weighing object 12 being conveyed through the annular path 28 is pushed out along the conveyance direction by the auxiliary bar 40. At this time, the back surface of the weighing object 12 and the main surface of the auxiliary bar 40 are in contact with each other.
As shown in FIG. 7 (2), when the auxiliary bar 40 stops in the conveyance conveyor stop area, the weighing object 12 remains in contact with the main surface of the auxiliary bar 40 by the frictional force with the installation surface, and the weighing pan of the weighing means 50 is in contact. Stop on 54.

  Then, as shown in FIG. 7 (3), the auxiliary bar 40 is moved in the direction opposite to the conveying direction (backward) so that the contact between the auxiliary bar 40 and the measurement object 12 is released (several millimeters, for example, 1 to 10 millimeters). As shown in FIG. 8, the movement of the auxiliary bar 40 is −X millimeters by combining the rotational speed W3 m / min of the rotary transport unit 22 and the reciprocating speed U3 m / min of the reciprocating unit 30 by the control unit. Can be realized.

Thus, after stopping the auxiliary bar 40 in the conveyance conveyor stop area, moving the weighing object 12 in the direction opposite to the conveying direction so as to release the contact between the auxiliary bar 40 and the weighing object 12 causes the weighing object 12 to interfere with weighing. It will be in the state which is not touching the thing. In this state, the weighing object 12 is weighed.
Next, as shown in FIG. 4 (4), when the auxiliary bar 40 is moved in the transport direction (forward), the back surface of the weighing object 12 comes into contact with the main surface of the auxiliary bar 40, and the weighing object 12 The bar 40 is extruded along the transport direction and passes through the transport conveyor stop area.

  Such release means 60 can release the contact between the weighing object 12 and the auxiliary bar 40 by forming a gap between the weighing object 12 and the auxiliary bar 40 in the conveyance conveyor stop area. Accordingly, an error during measurement due to the measurement object 12 and the auxiliary bar 40 being in contact with each other can be prevented, and high accuracy of measurement can be achieved.

[Modification 1]
FIG. 9 is an explanatory diagram of the release means of the first modification. As shown in the drawing, the air supply means 64 is used as the release means of the first modification.
The air supply means 64 blows air onto the weighing object 12 in the conveyor stop area and moves it on the weighing pan 54.

  FIG. 10 is a diagram for explaining the operation of the release means of the first modification. This figure shows the case where the inertial force by the transport means 20 acts on the weighing object 12 stopped in the transport conveyor stop area as in FIG. The specific configuration of the air supply means 64 is such that the tip of the nozzle is disposed between the auxiliary bar 40 and the weighing pan 54 on the front side in the transport direction of the weighing object 12, and air is supplied to the weighing object obliquely from the front. The contact with the auxiliary bar 40 is released by spraying.

As shown in FIG. 1A, the weighing object 12 being conveyed through the annular path 28 is pushed out along the conveyance direction by the auxiliary bar 40. At this time, the back surface of the weighing object 12 and the main surface of the auxiliary bar 40 are in contact with each other.
As shown in FIG. 2B, when the auxiliary bar 40 stops in the conveyance conveyor stop area, the weighing object 12 comes into contact with the back surface of the auxiliary bar 40 ahead by the inertial force and the weighing pan 54 of the weighing means 50 is touched. Stop on top.

As shown in FIG. 3 (3), the air supply means 64 blows air from the front side in the transport direction, so that the weighing object 12 is released from contact with the auxiliary bar 40 in the direction opposite to the transport direction (backward). (Several millimeters, for example, 1 to 10 millimeters) is moved on the weighing pan 54, and the weighing object 12 hits the conveyance guide 56 on the weighing pan 54 and stops. The conveyance guide 56 is integrated with the weighing pan 54 and does not affect the accuracy of weighing.
In this way, air is blown and moved to the weighing object 12 on the weighing pan 54 by the air supply means 64, so that the contact can be released by providing a gap between the auxiliary bar 40 and the weighing object 12. In this state, the weighing object 12 is weighed.

  Next, as shown in FIG. 4 (4), when the auxiliary bar 40 is moved in the transport direction (forward), the back surface of the weighing object 12 comes into contact with the main surface of the auxiliary bar 40, and the weighing object 12 The bar 40 is extruded along the transport direction and passes through the transport conveyor stop area.

  FIG. 11 is an operation explanatory view 2 of the releasing means of the first modification. This figure can also be applied to the case where the inertial force acting by the conveying means 20 is smaller than the frictional force between the measuring object 12 and the ground contact surface, as in FIG. A specific configuration of the air supply means 64 is such that the nozzle tip is disposed between the auxiliary bar 40 and the weighing pan 54 on the back side in the transport direction of the weighing object 12, and the air is blown diagonally from behind the weighing object. The contact with the auxiliary bar 40 is released by spraying.

  As shown in FIG. 1A, the weighing object 12 being conveyed through the annular path 28 is pushed out along the conveyance direction by the auxiliary bar 40. At this time, the back surface of the weighing object 12 and the main surface of the auxiliary bar 40 are in contact with each other.

As shown in FIG. 2B, when the auxiliary bar 40 stops in the conveyance conveyor stop area, the weighing object 12 remains in contact with the main surface of the auxiliary bar 40 due to the frictional force with the installation surface. Stop on 54.
And as shown in the figure (3), the air supply means 64 blows air from the back side in the transport direction so that the object 12 to be measured is released from the contact with the auxiliary bar 40 in the transport direction (front). (Several millimeters, for example, 1 to 10 millimeters) is moved on the weighing pan 54, and the weighing object 12 hits the conveyance guide 56 on the weighing pan 54 and stops. The conveyance guide 56 is integrated with the weighing pan 54 and does not affect the accuracy of weighing.

In this way, air is blown and moved to the weighing object 12 on the weighing pan 54 by the air supply means 64, so that the contact can be released by providing a gap between the auxiliary bar 40 and the weighing object 12. In this state, the weighing object 12 is weighed.
Next, as shown in FIG. 4 (4), when the auxiliary bar 40 is moved in the transport direction (forward), the back surface of the weighing object 12 comes into contact with the main surface of the auxiliary bar 40, and the weighing object 12 The bar 40 is extruded along the transport direction and passes through the transport conveyor stop area.

[Modification 2]
FIG. 12 is an explanatory diagram of the release means of the second modification. As shown in the figure, the release means of the second modification uses a press bar 66.
The press bar 66 contacts the weighing object 12 in the conveyance conveyor stop area from the front side or the back side in the conveyance direction, and moves the weighing object 12 on the weighing pan 54.

FIG. 13 is an operation explanatory view 1 of the releasing means of the second modification. This figure shows the case where the inertial force by the transport means 20 acts on the weighing object 12 stopped in the transport conveyor stop area as in FIG.
A specific configuration of the press bar 66 employs a configuration in which the press bar 66 moves back and forth from a direction orthogonal to the traveling direction of the weighing object 12 on the weighing pan 54. The press bar 66 is formed in a substantially wedge shape in plan view, and is attached so that the inclined surface on the side opposite to the transport direction (rear direction) is in contact with the measuring object 12. Such a press bar 66 releases the contact with the auxiliary bar 40 by contacting the weighing object 12 from the front side in the transport direction.

As shown in FIG. 1A, the weighing object 12 being conveyed through the annular path 28 is pushed out along the conveyance direction by the auxiliary bar 40. At this time, the back surface of the weighing object 12 and the main surface of the auxiliary bar 40 are in contact with each other.
As shown in FIG. 2B, when the auxiliary bar 40 stops in the conveyance conveyor stop area, the weighing object 12 comes into contact with the back surface of the auxiliary bar 40 ahead by the inertial force and the weighing pan 54 of the weighing means 50 is touched. Stop on top.

As shown in FIG. 3 (3), when the weighing object 12 is brought into contact with the press bar 66 from the front side in the conveying direction, the weighing object 12 is moved in the direction opposite to the conveying direction (backward) with the auxiliary bar 40. It moves on the weighing pan 54 so that the contact is released (several millimeters, for example, 1 to 10 millimeters), and hits the conveyance guide 56 on the weighing pan 54 and stops. The conveyance guide 56 is integrated with the weighing pan 54 and does not affect the measurement accuracy.
In this way, the press bar 66 contacts and moves the weighing object 12 on the weighing pan 54 from the front side in the transport direction, thereby providing a gap between the auxiliary bar 40 and the weighing object 12 to make contact. Can be canceled. In this state, the weighing object 12 is weighed.

  Next, as shown in FIG. 4 (4), when the auxiliary bar 40 is moved in the transport direction (forward), the back surface of the weighing object 12 comes into contact with the main surface of the auxiliary bar 40, and the weighing object 12 The bar 40 is extruded along the transport direction and passes through the transport conveyor stop area.

  FIG. 14 is an operation explanatory view 2 of the release means of the second modification. This figure can also be applied to the case where the inertial force acting by the conveying means 20 is smaller than the frictional force between the measuring object 12 and the ground contact surface, as in FIG. A specific configuration of the press bar 66 employs a configuration in which the press bar 66 moves back and forth from a direction orthogonal to the traveling direction of the weighing object 12 on the weighing pan 54. The press bar 66 is formed in a substantially wedge shape in plan view, and is attached so that the slope on the front side in the transport direction is in contact with the measurement object 12. Such a press bar 66 releases contact with the auxiliary bar 40 by coming into contact with the weighing object 12 from the direction opposite to the transport direction (rear direction).

As shown in FIG. 1A, the weighing object 12 being conveyed through the annular path 28 is pushed out along the conveyance direction by the auxiliary bar 40. At this time, the back surface of the weighing object 12 and the main surface of the auxiliary bar 40 are in contact with each other.
As shown in FIG. 2B, when the auxiliary bar 40 stops in the conveyance conveyor stop area, the weighing object 12 remains in contact with the main surface of the auxiliary bar 40 due to the frictional force with the installation surface. Stop on 54.

And as shown in the figure (3), the contact with the auxiliary | assistant bar | burr 40 is cancelled | released in the conveyance direction (front) by contacting the measuring object 12 by the press bar 66 from the back side of a conveyance direction. It moves on the weighing pan 54 (several millimeters, for example, 1 to 10 millimeters) and stops by hitting the conveyance guide 56 on the weighing pan 54. The conveyance guide 56 is integrated with the weighing pan 54 and does not affect the measurement accuracy.
In this way, the press bar 66 is moved in contact with the weighing object 12 on the weighing pan 54 from the reverse direction (rear direction) of the conveying direction, whereby a gap is formed between the auxiliary bar 40 and the weighing object 12. It is possible to release contact. In this state, the weighing object 12 is weighed.

  Next, as shown in FIG. 4 (4), when the auxiliary bar 40 is moved in the transport direction (forward), the back surface of the weighing object 12 comes into contact with the main surface of the auxiliary bar 40, and the weighing object 12 The bar 40 is extruded along the transport direction and passes through the transport conveyor stop area.

[Action]
The operation of the weighing device of the present invention having the above configuration will be described below.
The measuring object 12 is transferred from the separation star wheel 15 of the main transfer conveyor 14 to the supply star wheel 16 and continuously supplied to one side of the transfer straight line of the annular path 28 of the transfer means 20.

The conveying means 20 sets the rotational speed of the driving source 29 of the rotary conveying section 22 and the reciprocating speed of the driving source 32 of the reciprocating movement section 30 to different speeds during forward movement and backward movement. For this reason, the weighing object 12 is transported at the same speed as the moving speed of the main transport conveyor 14 on one side of the transport straight line of the annular path 28.
On the other hand, on the other side of the conveyance straight line of the annular path 28, a conveyance conveyor stop area is formed, and the plurality of measurement objects 12 are stopped in this area.

The weighing object 12 stopped in the conveyance conveyor stop area hits the back surface of the auxiliary bar 40 ahead by the inertia force and is stopped on the weighing pan 54 of the weighing means 50.
Then, when the auxiliary bar 40 is moved in the transport direction (forward) (several millimeters, for example, 1 to 10 millimeters) by the release means 60, the contact can be released by providing a gap between the auxiliary bar 40 and the weighing object 12. In this state, the weighing object 12 is weighed. A plurality of weighing objects 12 in the entire area of the conveyor stop area can be weighed by the weighing means 50.
The weighing object 12 after weighing is pushed out of the conveyance conveyor stop area by the auxiliary bar 40 and conveyed toward the discharge side on one side of the conveyance straight line of the annular path 28. Then, the weighing object 12 is continuously discharged from the discharge star wheel 18 to the main transfer conveyor 14.

On the other hand, when the inertial force applied by the conveying means 20 is smaller than the friction force between the weighing object 12 and the ground contact surface, when the auxiliary bar 40 stops in the conveyance conveyor stop area, the weighing object 12 is moved to the auxiliary bar by the friction force with the installation surface. It stops on the weighing pan 54 of the weighing means 50 while being in contact with the main surface of 40.
Then, when the auxiliary bar 40 is moved in the direction opposite to the conveyance direction (rearward direction) (several millimeters, for example, 1 to 10 mm) by the release means 60, a gap is provided between the auxiliary bar 40 and the measurement object 12, and contact is made. Can be canceled. In this state, the weighing object 12 is weighed. A plurality of weighing objects 12 in the entire area of the conveyor stop area can be weighed by the weighing means 50.

According to such a weighing apparatus of the present invention, a part of the weighing object being continuously conveyed as a whole can be temporarily stopped, and high accuracy of weighing can be realized.
In addition, since a stop area is provided in a part of the conveyor and weighs it, and the entire conveyor is being continuously transported, the production line can be speeded up.

  The weighing device of the present invention has industrial applicability in the field of manufacturing foods, pharmaceuticals, industrial products, daily necessities and the like.

DESCRIPTION OF SYMBOLS 10 ......... Measuring device, 12 ......... Measurement object, 14 ......... Main transfer conveyor, 15 ......... Disconnected star wheel, 16 ......... Star wheel for supply, 18 ......... Star wheel for discharge, 20 ......... Conveying means, 22 ......... Rotary conveying part, 24 ......... Axis, 25 ......... Case, 26 ......... Axis, 28 ......... Annular path, 29 ......... Drive source, 30 ......... Reciprocating part 31 ......... Base body 32 ... Drive source 34 ... Slide part 35 ... Reciprocating drive part 36 ... Screw shaft 37 ......... Bearing 38 ......... Nut, 40 ......... Auxiliary bar, 50 ......... Measuring means, 56 ......... Transport guide, 60 ......... Release means, 62 ......... Control part, 64 ......... Air supply means, 66 ......... Press bar.

Claims (4)

A rotating and conveying unit that rotates and conveys an object to be measured along an annular path formed around two axes at a predetermined interval; and a reciprocating unit that reciprocates the entire rotating and conveying unit by a predetermined distance along a straight line passing through the two axes. Transport means provided with a conveyor stop area where the measurement object stops in a part of the annular path;
Plurally attached to the annular path at equal intervals, a main surface is arranged in a direction substantially perpendicular to the conveying direction, and the measuring object is pushed out by contacting the main surface from the back side of the measuring object with respect to the conveying direction. An auxiliary bar to be conveyed
Weighing means for weighing the stopped weighing object, provided below the conveyor stop area;
Release means for releasing the contact between the weighing object and the auxiliary bar stopped in the conveyance conveyor stop area;
A weighing device comprising:   The release means is a control unit that moves the auxiliary bar in the transport direction or in the direction opposite to the transport direction so that the contact of the weighing object is released after stopping the auxiliary bar in the transport conveyor stop area. The weighing device according to claim 1.   2. The measuring apparatus according to claim 1, wherein the releasing means is an air supply means that blows air onto the weighing object in a conveyance conveyor stop area and moves it on a weighing pan of the weighing means.   2. The weighing apparatus according to claim 1, wherein the releasing means is a press bar that is moved from the front side or the back side of the weighing object in the conveyor stop area and moved on the weighing pan of the weighing means. .