JP2007057264A - Metering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a processing capacity of a packing machine by enabling highly accurate measurement and enabling high-speed conveyance by stopping immediately rocking of a measuring object conveyed to a measuring position. <P>SOLUTION: This measuring device 10 for measuring the weight of the measuring object W, provided on some position on a conveyance route for conveying the measuring object W with a bag 5 filled with a content intermittently in the suspended state, is equipped with a rocking prevention means 20 provided movably toward the measuring object W, to be brought into contact with the measuring object W by moving members 21, 27 in the vertical direction and/or in the transverse direction by receiving a driving force from driving means 25, 28, to thereby stop rocking of the measuring object W at a measuring time. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a weighing device that is provided in a conveyance path for conveying an object to be weighed filled with contents in a bag in a suspended state, and relates to a weighing device that measures a physical quantity such as the weight of the object to be weighed. The present invention relates to a weighing device that immediately stops shaking of an object to be weighed.

  In order to fill the bag with contents such as flour, a packaging machine is used that fills the contents at a predetermined position in the transport path while intermittently transporting the bag in a suspended state. Then, the weight of the object to be weighed (with the contents filled in the bag) is weighed by a weighing device provided at any position after the filling position in the transport path.

Such a packaging machine includes, for example, a measuring bag filling and packaging apparatus disclosed in Patent Document 1 below. In this packaging device, each packaging bag sandwiched between both edges by a large number of clamps each having two rotor peripheral edges is intermittently moved along a circular orbit by rotation of the rotor. After filling the bag into the bag at the stop position, the bag is temporarily moved to the movable jaw at the rear stop position, and the weight of the package in the bag is measured by the weighing mechanism connected to the movable jaw. To do. In the weighing mechanism, the controller calculates a deficiency error between the measured value of the object to be packaged sent from the load cell and the preset target value, and sends this calculated value to the weighing replenishment mechanism. When the stop position is reached, the weighing replenishment mechanism replenishes the bag with the packaged items to compensate for the shortage error.
Japanese Patent Laid-Open No. 7-40940

  However, in the conventional packaging machine as described above, when weighing the weight of the object to be weighed, when the object to be weighed is transferred to the weighing unit, the object to be weighed is shaken with high accuracy. Could not be measured. In particular, since the packaging device disclosed in Patent Document 1 is a rotary type in which a bag moves along a circular orbit by rotation of a rotor, each bag is rotated in a direction substantially orthogonal to the rotation direction of the rotor by centrifugal force. It will shake greatly.

  Therefore, in the weighing unit (measuring mechanism), the object to be weighed placed in the weighing position is sucked with a vacuum or the like to stop shaking, but the shape of the suction surface of the object to be weighed filled with contents is stabilized. As a result, it did not adsorb well and could not stop shaking immediately. In addition, when the bag is thin, the contents sway even when adsorbed on the bag, and as a result, the shaking of the object to be weighed cannot be stopped immediately. For this reason, conventionally, in order to perform high-precision weighing, it is necessary to secure time until the shaking stops, and therefore, the object to be weighed cannot be conveyed at high speed.

  Furthermore, in order to perform high-speed conveyance with the packaging machine, it is necessary to provide a conveyance guide rail for preventing an object to be weighed during conveyance. This guide rail is provided in a substantially annular shape along the transport path, and prevents the object to be weighed from spreading in a direction perpendicular to the transport direction (rotation direction of the rotor) due to centrifugal force. However, in the weighing unit, the weighing object is in contact with the conveyance guide rail during weighing, and thus a weighing error occurs, which hinders high-precision weighing. That is, in the prior art, it has not been possible to provide a transport guide rail necessary for high-speed transport in the packaging machine (particularly the weighing unit).

  Accordingly, the present invention has been made in view of the above situation, and by immediately stopping the shaking of the object to be weighed that has been transported to the weighing position, it becomes possible to perform high-accuracy weighing and to transport the object to be weighed at high speed. As a result, an object of the present invention is to provide a weighing device that improves the processing capacity of the packaging machine.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The weighing device 10 according to claim 1 of the present invention is provided at any position on a conveyance path for intermittently conveying the object W to be weighed filled with the contents in the bag 5 in a suspended state. In the weighing device 10 that measures the physical quantity of the weighing object W,
It is provided with sway prevention means 20 that is provided so as to be movable toward the object to be weighed W, and stops shaking at the time of weighing in contact with the object to be weighed W.
The movement in this case includes not only a change in the position of the rigid body but also a partial movement due to deformation of the elastic body or the like.

  According to such a configuration, it is possible to measure the physical quantity such as its weight in a stationary state by stopping the object W from shaking at the measurement position. Thereby, the highly accurate measurement of the to-be-measured object W is attained. In addition, the weighing time of each object W to be measured is shortened and high-speed conveyance becomes possible.

The weighing device 10 according to claim 2 includes a weighing unit 13 that weighs the object to be weighed W and is loaded on the support member 11 by being supported by the support member 11.
The shaking preventing means 20 is provided on the load-loading side of the weighing unit 13 and is integrated with the weighing unit 13 in a load manner.

  According to such a configuration, when the weight of the object to be weighed W is weighed, the vibration preventing means 20 that comes into contact with the object to be weighed W is integrated with the weighing unit 13 in a load. The weight can be weighed while being in contact with the workpiece W. At this time, the load of the shake preventing means 20 and the object to be weighed W is not applied to anything other than the weighing unit 13. Accordingly, for example, the weight of the shake preventing means 20 is stored in the weighing unit 13 in advance, and accurate weighing is possible by performing processing such as subtracting the weight of the shake preventing means 20 from the measured value.

  The weighing device according to claim 3, wherein the shaking preventing means 20 moves when the object to be weighed W is transported to a weighing position and moves to contact the object to be weighed W 27, 27, and the movement. Drive means 25 and 28 for driving the members 21 and 27 are provided.

  According to such a configuration, the object to be weighed W is shaken when the moving members 21 and 27 that are moved by receiving the driving force from the driving means 25 and 28 come into contact with the object to be weighed W that has been transported to the weighing position. Can be stopped immediately.

  The weighing apparatus 10 according to claim 4 is characterized in that the moving member 21 moves in the vertical direction and contacts the object to be weighed W from below.

  The weighing device 10 according to claim 5 is characterized in that the moving members 27, 27 move in the lateral direction and come into contact with the object W from the side.

The weighing device according to claim 6, wherein the shaking prevention means 20 includes a plurality of the moving members 21, 27.
One moving member 21 moves in the vertical direction and comes into contact with the object to be weighed W from below. Further, one moving member 27, 27 moves in the lateral direction and moves with respect to the object to be weighed W. It contacts from the side.

  According to such a configuration, when the moving members 21 and 27 come into contact with the object to be weighed W that has been transported to the weighing position from below or from the side, for example, along a circular orbit due to the rotation of the rotor 2. At the weighing position of the rotary packaging machine 1 that conveys the object to be weighed W, it is possible to effectively stop the shaking in the direction orthogonal to the conveying direction (rotor direction of the rotor) that occurs in the object to be weighed W.

  Further, by coming into contact with the object to be weighed W from below, it is possible to stop the swinging of the object to be weighed W in each direction, and the object to be weighed W is stably stopped vertically below the weighing unit 13. This improves the weighing accuracy.

  Furthermore, by contacting the object to be weighed W from the side, the object W to be weighed can be stopped at the center in the vertical direction of the weighing unit 13, thereby improving the weighing accuracy as described above.

  And if the shaking prevention means 20 is the structure which comprises each moving member 21 and 27 which moves to an up-down direction and a horizontal direction, it will become possible to stop the to-be-measured object W more effectively.

  The weighing device 10 according to claim 7, wherein the shaking preventing means 20 includes an elastic member 30 that elastically deforms and comes into contact with the object to be weighed W when the object to be weighed W is conveyed to the weighing position. Features.

  According to such a configuration, it is possible to immediately stop shaking of the object to be weighed when the elastic member 30 receives the external force and comes into contact with the elastically deformed portion of the object to be weighed that has been transported to the weighing position. Become. At this time, for example, by adopting a configuration in which the object to be weighed W conveyed to the measuring position comes into contact and elastically deforms the elastic member 30, a driving source for deforming the elastic member 30 becomes unnecessary, and the apparatus is simplified. Can be realized.

The weighing device according to claim 8 includes a weighing unit that measures the weight of the object to be weighed W and is loaded on the support member by being supported by the support member.
The shaking prevention means 20 is provided so as to be separated from the weighing unit 13 in terms of load, and is separated from the weighing object W after contacting the weighing object W.

  According to such a configuration, when the weight of the object to be weighed W is weighed, the shaking preventing means 20 separated from the weighing unit 13 in contact with the object to be weighed W that has been transported to the weighing position, Only the load of the object to be weighed W is applied to the weighing unit 13 by stopping the shaking of the object to be weighed and then moving away.

  According to the weighing device of the present invention, it is possible to immediately stop the shaking of the object to be weighed that has been transported to the weighing position and measure its physical quantity in a stationary state, thereby enabling high-precision weighing of the object to be weighed. In addition, the weighing time of each object to be weighed is shortened and high-speed conveyance becomes possible. As a result, the processing capacity of the packaging machine can be improved.

  In addition, when weighing the object to be weighed, the vibration prevention means that comes in contact with the object to be weighed is integrated with the weighing unit so that the weight is measured while the vibration prevention means is in contact with the object to be weighed. Will be able to. At this time, since the load of the shaking prevention means and the object to be weighed is not applied to any part other than the weighing part, for example, the weight of the shaking prevention means is stored in the weighing part in advance, and the weight of the shaking prevention means is subtracted from the measured value. Accurate measurement is possible by performing such processes. As a result, the weighing error due to the shaking can be reduced by weighing while the shaking preventing means is in contact with the object to be weighed, and the weighing error due to the shaking preventing means being in contact with the object to be weighed can be eliminated.

  Further, when the moving member contacts the object to be weighed arranged at the weighing position from below and / or from the side, for example, a rotary packaging machine that conveys the object to be weighed along a circular orbit by rotation of the rotor. At the measurement position, it is possible to effectively stop the shaking in the direction perpendicular to the conveyance direction (rotor rotation direction) generated in the object to be weighed.

  In addition, when the elastic member receives an external force and comes into contact with the elastically deformed portion of the object to be weighed that has been transported to the weighing position, the object to be weighed can be immediately stopped. Furthermore, at this time, by adopting a configuration in which the object to be weighed that has been transported to the measuring position comes into contact with the elastic member, the elastic member is elastically deformed, so that a drive source for deforming the elastic member is not necessary, and the apparatus can be simplified. Become.

  Also, when weighing the object to be weighed, the shaking prevention means that comes into contact with the object to be weighed is separated from the weighing section by load, and the shaking prevention means comes into contact with the object to be weighed to stop the shaking of the object to be weighed. By separating from the distance, only the load of the object to be weighed is applied to the weighing unit. As a result, the measurement error due to the shaking of the object to be measured can be reduced, and the measurement error caused by bringing the shaking preventing means into contact with the object to be measured can be eliminated.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a schematic plan view showing a packaging machine equipped with a weighing device according to the present invention.

First, a packaging machine provided with a weighing device according to the present invention will be described.
This packaging machine is provided with a filling device, a weighing device, and a correction filling device on the conveyance path, and is filled with a content such as flour in a bag to be conveyed, and is placed behind the filling position (content Weigh the weight of the object to be weighed), and correct and fill the contents corresponding to the shortage at the time of measurement after the weighing position, and transport the object to the transport device etc. It is.

  As shown in FIG. 1, this rotary type packaging machine 1 is provided with a plurality of arm-shaped packaging machine side holding parts 3 and 3 each having a set of two on the periphery of a circular rotor 2 that rotates intermittently. A clip portion 4 for holding the packaging bag 5 is provided at the tip of the packaging machine side holding portions 3 and 3. In addition, the clip part 4 has clamped the bag mouth both ends edge of the said bag 5. FIG.

  On the outer periphery of the rotor 2, a conveyance guide rail 6 made of two substantially annular members having different diameters is provided. In this conveyance guide rail 6, an inner guide rail 7 and an outer guide rail 8 are horizontally disposed concentrically and before the object W or contents are filled between the inner and outer guide rails 7, 8. The bag 5 is conveyed. The inner and outer guide rails 7 and 8 each have a notch in a portion corresponding to the position of the weighing device 10 described later, and movable guides 7a and 8a are provided in the notch portions, respectively. Each of the movable guides 7a and 8a receives a driving force from a driving unit (not shown) and moves horizontally so as to be relatively close to and away from the diameter direction of the rotor 2.

  And the bag 5 clamped by the clip part 4 between the inner and outer guide rails 7 and 8 of the conveyance guide rail 6 is conveyed along the circular orbit by intermittent rotation of the rotor 2, and is a predetermined position (filling position) in the conveyance path. The contents are filled by a filling device (not shown) provided in (). Next, the object to be weighed W (the one in which the contents are filled in the bag 5) is transported to the weighing device 10 provided at any position after the filling device and weighed. Further, the object to be weighed W is transported to a correction filling device (not shown) provided at a predetermined position (correction filling position) behind the weighing device 10 and stored in advance in a weighing value sent from the weighing device 10 and a storage device (not shown). The deficient content due to the measurement error calculated by comparing with the stored set value is corrected and filled.

  Hereinafter, the weighing device of the present invention will be specifically described for each embodiment with reference to the drawings.

  Here, FIG. 2 is a schematic view showing a position where the shaking preventing means constituting the weighing device of the present invention is provided. The shake preventing means 20 is provided on the load load side of the measuring unit 13 and is integrated with the measuring unit 13 in terms of load. In this case, the weighing unit 13 is loaded with the load of the shaking preventing means 20 in addition to the load of the object W to be weighed.

First, the first embodiment will be described.
FIG. 3 is a side view showing a first embodiment of a weighing device according to the present invention.

  As shown in FIG. 1, the weighing device 10 described above is provided at any position on the transport path of the rotary packaging machine 1. However, in the present embodiment, the weighing device 10 is provided behind the filling device and in front of the correction filling device. As shown in FIG. 3, the weighing device 10 is configured substantially by a weighing unit 13, a weighing unit side holding unit 14, and a shake preventing means 20, and an arm unit 12 extending from the column member 11 in the orthogonal direction. It is supported by.

  As shown in FIG. 3, the weighing unit 13 has weighing means (not shown) that measures the weight of the workpiece W that has been conveyed to the weighing device 10, and is placed on the distal end side of the arm 12 that extends from the column member 11. It is installed. The load of the measuring unit 13 is supported by the support member 11 via the arm unit 12.

  The weighing unit side holding unit 14 is provided so as to hang down below the weighing unit 13, and has an openable and closable chuck unit 15 that sandwiches the object W to be measured. The chuck portion 15 has a front-end opening / closing port 16 facing downward, and a base end side is connected to a driving portion 17 such as an air cylinder via gears 18 and 18, and the gears 18 and 18 are rotated in conjunction with driving of the air cylinder 17. Thus, the opening / closing port 16 opens and closes. In the weighing unit side holding unit 14, as described above, the clip W 4 of the packaging machine side holding unit 3 holds the object to be weighed W sandwiched between both edges of the bag mouth of the bag 5, and the chuck unit 15 The opening / closing port 16 holds the upper edge of the bag 5 and holds it in a suspended state at the weighing position.

The shaking preventing means 20 is generally constituted by a moving member 21 and a driving means 25. As described above, the moving member 21 and the driving means 25 are provided on the load side of the weighing unit 13 and integrated with the weighing unit 13 in a load manner.
The bottom raising mechanism portion 21 as a moving member has a contact portion 22 having a flat surface at an upper portion connected to one end portion of a substantially Z-shaped crankshaft 23 so as to be rotatable. Further, the crankshaft 23 is rotatably connected to a driving means 25 described later at the other end and a side member 24 at an intermediate portion.

  The air cylinder 25 as the driving means described above is arranged vertically so that the piston rod 26 faces downward, and is fixed to the side member 24 with a bolt or the like. Further, the tip end portion of the piston rod 26 is rotatably connected to the other end portion of the crankshaft 23, and the contact portion 22 moves up and down via the crankshaft 23 by the vertical movement of the piston rod 26, It contacts the bottom of the object W from below.

Next, the operation of each part when the object to be weighed W has been transported to the weighing device 10 of the first embodiment will be described.
First, the object to be weighed W in which the contents are filled in the bag 5 is transported to the weighing position with both ends of the bag mouth of the bag 5 held between the clip portions 4 of the holding unit 3 on the packaging machine.

  Next, the chuck portion 15 of the weighing unit side holding portion 14 holds the upper edge of the bag 5 at the opening / closing port 16, and the clip portion 4 of the packaging machine side holding portion 3 opens the bag 5 at the same time or a little later. This completes the delivery of the workpiece W to the weighing unit side holding unit 14.

  Next, the moving member 21 of the shake preventing means 20 moves and contacts the workpiece W held in a suspended state on the weighing unit side holding unit 14. Specifically, as shown in FIG. 3, the contact portion 22 of the bottom raising mechanism portion 21 that is a moving member rises to contact the bottom portion of the object to be weighed W, and guides the conveyance of the object W to be measured until then. The movable guides 7a and 8a of the inner and outer guide rails 7 and 8 that have been moved horizontally move away from each other. Thereby, the shaking of the to-be-measured object W which has been conveyed stops.

  Next, the weight of the object W in a stationary state is weighed by the weighing means of the weighing unit 13. As shown in FIG. 2, the bottom raising mechanism portion 21 is provided on the load load side of the weighing unit 13 and is integrated with the weighing unit 13 in a load manner. And since the process which subtracts the weight of the raising mechanism part 21 memorize | stored beforehand in the measurement part 13 from a measured value is performed, even if it contacts the to-be-measured object W at the time of measurement, a measured value is not exerted.

  When the weighing by the weighing unit 13 is finished, the contact part 22 of the bottom raising mechanism 21 that is in contact with the object to be weighed is immediately separated from the object to be weighed W.

  And the clip part 4 of the packaging machine side holding | maintenance part 3 clamps the bag mouth both ends edge of the bag 5, and the chuck | zipper part 15 of the measuring device side holding | maintenance part 14 opens the upper edge of the bag 5 simultaneously or slightly behind it. . This completes the delivery of the object to be weighed W to the packaging machine side holding part 3 again. The object to be weighed W whose weight has been weighed by the weighing device 10 is conveyed to a rear device (such as a correction filling device).

  According to the first embodiment, it is possible to immediately stop shaking of the object to be weighed W and measure its weight in a stationary state at the weighing position. Thereby, the highly accurate measurement of the to-be-measured object W is attained. In addition, the weighing time of each object W to be measured is shortened and high-speed conveyance becomes possible. As a result, the processing capacity of the packaging machine can be improved.

  In addition, since the bottom raising mechanism 21 is integrated with the weighing unit 13 in a load, the weight can be measured while the bottom raising mechanism 21 is in contact with the workpiece W. Accordingly, the object to be weighed W does not shake during weighing, and accurate weighing is possible.

  Further, when the bottom raising mechanism 21 comes into contact with the workpiece W that has been transported to the weighing position from below, the conveyance direction that occurs in the workpiece W at the weighing position of the rotary packaging machine 1 (rotation direction of the rotor). ) Can be effectively stopped. In particular, the weighing accuracy is improved because the object W is stably kept stationary vertically below the weighing unit 13.

  Further, since the air cylinder 25 that drives the bottom raising mechanism 21 is vertically arranged so that the piston rod 26 moves up and down, vibration during driving can be suppressed, and high-precision weighing of the object W to be measured is hindered. It can drive without.

Next, a second embodiment will be described.
FIG. 4 is a side view showing a second embodiment of the weighing device according to the present invention.
Note that, in the second embodiment described below, the same reference numerals are given to the same or identical portions as those in the first embodiment described above, and the description thereof is omitted.

As shown in FIG. 4, the shaking preventing means 20 is generally constituted by a moving member 27 and a driving means 28.
The sandwiching guides 27 and 27 as moving members are provided below the movable guides 7a and 8a provided in the notched portions of the inner and outer guide rails 7 and 8 constituting the conveyance guide rail 6 described above. The sandwiching guides 27, 27 receive a driving force from an air cylinder 28 as a driving means when the object to be weighed W is disposed at the weighing position, and are horizontally moved so as to be relatively close to each other in the diameter direction of the rotor 2. It moves and comes into contact with the side surface of the object W in the proximity state.

Next, the operation of each unit when the object to be weighed W is conveyed to the weighing device 10 of the second embodiment will be described.
First, the object to be weighed W in which the contents are filled in the bag 5 is transported to the weighing position with both ends of the bag mouth of the bag 5 held between the clip portions 4 of the holding unit 3 on the packaging machine.

  Next, the chuck portion 15 of the weighing unit side holding portion 14 holds the upper edge of the bag 5 at the opening / closing port 16, and the clip portion 4 of the packaging machine side holding portion 3 opens the bag 5 at the same time or a little later. This completes the delivery of the workpiece W to the weighing unit side holding unit 14.

  Next, the moving member 27 of the shaking preventing means 20 moves and contacts the workpiece W held in a suspended state on the weighing unit side holding unit 14. Specifically, as shown in FIG. 4, the sandwiching guides 27, 27 that are moving members move horizontally so as to come close to each other and come into contact with the side surface of the object to be weighed. The movable guides 7a and 8a of the inner and outer guide rails 7 and 8 that have guided the conveyance move horizontally so as to be separated from each other. Thereby, the shaking of the to-be-measured object W which has been conveyed stops.

  Next, the weight of the object W in a stationary state is weighed by the weighing means of the weighing unit 13. The sandwiching guides 27 and 27 are provided on the load load side of the measuring unit 13 and are integrated with the measuring unit 13 in terms of load. And since the process of subtracting the weight of the sandwiching guides 27, 27 stored in advance in the weighing unit 13 from the measured value is performed, the measured value is not affected even if it is in contact with the workpiece W during measurement. Absent.

  When the weighing by the weighing unit 13 is finished, the sandwiching guides 27 and 27 that are in contact with the object W are immediately separated from the object W.

  And the clip part 4 of the packaging machine side holding | maintenance part 3 clamps the bag mouth both ends edge of the bag 5, and the chuck | zipper part 15 of the measuring device side holding | maintenance part 14 opens the upper edge of the bag 5 simultaneously or slightly behind it. . This completes the delivery of the object to be weighed W to the packaging machine side holding part 3 again. The object to be weighed W whose weight has been weighed by the weighing device 10 is conveyed to a rear device (such as a correction filling device).

  According to the second embodiment, in addition to the same effects as those of the first embodiment described above, the sandwiching guides 27, 27 are provided from the side with respect to the workpiece W that has been transported to the weighing position. By contacting, it is possible to stop the shaking in each direction that occurs on the workpiece W at the weighing position of the rotary packaging machine 1. In particular, the weighing object W can be stopped at the center of the weighing unit 13 in the vertical direction, thereby improving the weighing accuracy as described above.

Next, a third embodiment will be described.
FIG. 5 is a side view showing a third embodiment of the weighing device according to the present invention.
Note that in the third embodiment described below, the same reference numerals are given to the same or identical portions as those in the first and second embodiments described above, and the description thereof is omitted.

  As shown in FIG. 5, the shake preventing means 20 is generally configured by a plurality of moving members 21 and 27 and driving means 25 and 28 for driving the moving members.

  The moving member is substantially constituted by a bottom raising mechanism portion 21 and sandwiching guides 27 and 27.

Next, the operation of each part when the object to be weighed W has been transported to the weighing device 10 of the third embodiment will be described.
First, the object to be weighed W in which the contents are filled in the bag 5 is transported to the weighing position with both ends of the bag mouth of the bag 5 held between the clip portions 4 of the holding unit 3 on the packaging machine.

  Next, the chuck portion 15 of the weighing unit side holding portion 14 holds the upper edge of the bag 5 at the opening / closing port 16, and the clip portion 4 of the packaging machine side holding portion 3 opens the bag 5 at the same time or a little later. This completes the delivery of the workpiece W to the weighing unit side holding unit 14.

  Next, the moving members 21 and 27 of the shaking prevention means 20 move and contact toward the workpiece W held in a suspended state on the weighing unit side holding unit 14. Specifically, among the moving members, the contact portion 22 of the bottom raising mechanism portion 21 rises and contacts the bottom portion of the workpiece W. At the same time, the sandwiching guides 27, 27 move horizontally so as to be close to each other and come into contact with the side surface of the object to be weighed W. The eight movable guides 7a, 8a move horizontally so as to be separated from each other. Thereby, the shaking of the to-be-measured object W which has been conveyed stops.

  Next, the weight of the object W in a stationary state is weighed by the weighing means of the weighing unit 13. The bottom raising mechanism 21 and the sandwiching guides 27 and 27 are both provided on the load side of the measuring unit 13 and are integrated with the measuring unit 13 in terms of load. And since the process which subtracts the weight of the raising mechanism part 21 and the pinching guides 27 and 27 previously memorize | stored in the measurement part 13 from a measured value is performed, even if it contacts the to-be-measured object W at the time of measurement, it becomes a measured value. There is no impact.

  When the weighing by the weighing unit 13 is finished, the contact portion 22 of the bottom raising mechanism 21 and the sandwiching guides 27 and 27 that are in contact with the workpiece W are immediately separated from the workpiece W.

  And the clip part 4 of the packaging machine side holding | maintenance part 3 clamps the bag mouth both ends edge of the bag 5, and the chuck | zipper part 15 of the measuring device side holding | maintenance part 14 opens the upper edge of the bag 5 simultaneously or slightly behind it. . This completes the delivery of the object to be weighed W to the packaging machine side holding part 3 again. The object to be weighed W whose weight has been weighed by the weighing device 10 is conveyed to a rear device (such as a correction filling device).

  According to the third embodiment, the same effects as those of the first and second embodiments described above can be obtained. In addition to this, the bottom raising mechanism 21 and the sandwiching guides 27 and 27 come into contact with each other from below and from the side, so that it is possible to more effectively stop the swing of the workpiece W at the measurement position.

  According to each of the first to third embodiments described above, as shown in FIG. 2, the shake preventing means 20 is provided on the load load side of the weighing unit 13 and integrated with the weighing unit 13 in a load manner. However, as shown in FIG. 6, the shake preventing means 20 may be provided at a position separated from the measuring unit 13 by load (the support member 11 in FIG. 6). At this time, the shaking prevention means 20 contacts the object to be weighed W and then moves away from the object to be weighed W. In other words, the object is separated after contacting the object to be weighed W to stop shaking. As a result, since only the load of the object to be weighed W is applied to the weighing unit 13 during weighing, the weighing error caused by bringing the shake preventing means 20 into contact with the object to be weighed can be eliminated. An effect is obtained.

  Further, in the second and third embodiments described above, the sandwiching guides 27 and 27 as the moving members of the vibration preventing means 20 are formed of rigid bodies, and the positions thereof are changed by the driving force from the air cylinder 28. As shown in FIG. 7, for example, elastic members 30 and 30 such as leaf springs and sponges are continuously arranged from the inner and outer guide rails 7 and 8 as shown in FIG. And it is good also as a structure which made the space | interval between the elastic members 30 and 30 slightly narrower than the width | variety of the to-be-measured object W. FIG. At this time, as shown in FIG. 7A, the object to be weighed W that has been transported to the weighing position is disposed between the elastic members 30 and 30 as shown in FIG. The elastic members 30, 30 are elastically deformed so as to expand outwardly in contact with W. Thus, in addition to the same effects as those of the second and third embodiments, a driving source for deforming the elastic members 30 and 30 is not required, and the apparatus 10 can be simplified. Further, the elastic members 30 and 30 also serve as the transport guide rails 6 (inner and outer guide rails 7 and 8). Therefore, the movable guides 7a and 8a (see FIG. 1) at the measuring position are not required, and the apparatus 10 is configured. The number of parts to be reduced can be reduced, and the configuration can be further simplified.

  Alternatively, the elastic member may be elastically deformed by receiving a driving force from the driving means, and the deformed portion may be in contact with the object to be weighed W. In other words, when the object to be weighed W is arranged at the weighing position, the driving means is driven, and the elastic member is elastically deformed to contact the object to be weighed W. Thereby, the same effect as the first and third embodiments can be obtained.

It is a schematic top view which shows the packaging machine provided with the measuring device by this invention. It is a schematic side view which illustrates the position where the shaking prevention means which comprises the same weighing | measuring apparatus is provided. It is a side view which shows 1st Embodiment of the measuring device. It is a side view which shows 2nd Embodiment of the measuring device. It is a side view which shows 3rd Embodiment of the weighing | measuring device. It is a schematic side view which illustrates the position where the shaking prevention means which comprises the same weighing | measuring apparatus is provided. (A) It is a schematic top view which shows operation | movement of the modification of the pinch | guide guide in 2nd and 3rd embodiment of the measuring device. (B) It is a schematic top view which shows operation | movement of the modification of the pinch | guide guide in 2nd and 3rd embodiment of the measuring device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 ... Bag 10 ... Measuring device 11 ... Supporting member 13 ... Measuring part 20 ... Shaking prevention means 21 ... Bottom raising mechanism part as a moving member 25, 28 ... Air cylinder as a driving means 27 ... Clamping guide as a moving member 30 ... Elastic member W ... Measurement object

Claims (8)

A weighing device for weighing a physical quantity of the object to be weighed, provided at any position on a conveyance path for intermittently conveying the object to be weighed (W) filled with the contents in the bag (5) in a suspended state. In (10),
A weighing apparatus provided with sway prevention means (20) which is provided so as to be movable toward the object to be weighed, and stops shaking during measurement by contacting the object to be weighed. The weighing object (W) is weighed and provided with a weighing unit (13) loaded on the support member by being supported by the support member (11).
The weighing apparatus according to claim 1, wherein the shaking prevention means (20) is provided on a load-loading side of the weighing unit and is integrated with the weighing unit in a load manner.   The shaking prevention means (20) includes a moving member (21, 27) that moves when the object (W) is conveyed to a measuring position and contacts the object to be measured, and a drive that drives the moving member. 3. A weighing device according to claim 2, characterized in that it comprises means (25, 28).   The weighing device according to claim 3, wherein the moving member (21) moves in the vertical direction and contacts the object (W) from below.   The weighing apparatus according to claim 3, wherein the moving member (27) moves in a lateral direction and contacts the object (W) from the side. The shaking prevention means (20) includes a plurality of the moving members,
One moving member (21) moves in the vertical direction and comes into contact with the object to be weighed (W) from below, and further one moving member (27) moves in the lateral direction to move the object to be weighed. The weighing device according to claim 3, wherein the weighing device contacts from the side.   The said shaking prevention means (20) is provided with the elastic member (30) which elastically deforms and contacts this to-be-measured object when the said to-be-measured object (W) is conveyed to a measurement position. 2. The weighing device according to 2. The weighing object (W) is weighed and provided with a weighing unit (13) loaded on the support member by being supported by the support member (11).
The weighing apparatus according to claim 1, wherein the shaking preventing means (20) is provided so as to be separated from the weighing unit by a load, and is separated from the weighing object after contacting the weighing object.

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