JP5274160B2 - Platform position adjustment system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workbench position adjusting system capable of adjusting a position of a workbench in real time according to natural movement during a worker's work without executing such a separate operation as to affect work. <P>SOLUTION: The position adjusting system adjusts a position of a seating of the workbench according to a change in a worker's center of gravity. More specifically, a position of the worker's center of gravity while the worker is standing perpendicular to an installation surface is set to a reference center of gravity. A position of the seating while the worker is working at the reference center of gravity is set to a reference position and each time the worker's center of gravity changes from the reference center of gravity, the position of the seating is moved from the reference position. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a workbench position adjustment system, and more particularly to a technique preferably applied to a workbench in which workers having different body shapes and postures work on a table in a production line of a manufacturer, for example.

  In the production line, desks and tables (work tables) for workers to work on must be done in advance, regardless of their body shape, even if the height is fixed or the height can be adjusted. It is common to have to. In addition, small objects such as jigs, remote controls and manuals necessary for the work, and auxiliary objects such as peripheral devices are often located at a low position with respect to the work object. Under these circumstances, until now, even if the worker's body shape and posture are different, the height of the work table has been compromised at a predetermined position, so the worker unconsciously bends his waist and holds his arm. I stretched out and picked up objects and aids. In addition, various measures have been taken on the workbench to place objects in an easy-to-take position, and a mechanism that automatically comes out is added to improve work efficiency and reduce the physical burden on the operator. I was planning.

For example, Patent Document 1 discloses a cell production work cart that can increase productivity in a cell production system and reduce worker fatigue. The cell production work cart of Patent Document 1 includes a base portion having a plurality of traveling wheels, a working member for performing work, and a telescopic lifting / lowering strut portion having lifting / lowering operation means. The height of the work member can be adjusted by operating the lifting operation means. The cell production system is a system in which one worker is responsible for a plurality of processes or all processes including assembly, inspection, and packaging.
JP 2003-251575 A

  The work table used in the production line until now has a fixed height, or the height is adjusted in advance and the work is performed at the adjusted height. The height of the workbench could not be changed, leading to reduced work efficiency and increased worker fatigue. Moreover, although invention of patent document 1 makes it possible to adjust the height of the member for work as needed, an operator must operate the raising / lowering operation means separately from work in the middle of work. Unless the height of the workbench can be adjusted without affecting the work, it cannot be said that the work efficiency is improved.

  Therefore, the present invention provides a workbench position adjustment capable of adjusting the workbench position in real time according to a natural operation during the work of the worker without performing a separate operation that affects the work. The purpose is to provide a system.

Base in order to achieve the above object, the first positioning system of the present invention, the operator sets the reference centroid centroid position standing perpendicular to the installation surface, to work in the operator reference centroids set the position to the reference position, and moves the position of the base from the reference position each time the center of gravity of the operator is changed from the reference center of gravity.

  A second work table position adjusting system according to the present invention includes a work table provided with a pedestal on which a work is placed and a drive unit that moves the pedestal up and down in the vertical direction of the installation surface or back and forth and right and left in the same plane, and an operator And a control device for adjusting the position of the pedestal by controlling the driving means so that the control device stands perpendicular to the installation surface with respect to the operator. The center of gravity position measured by the center of gravity measuring device after guidance is set as a reference center of gravity that serves as a reference for the position movement of the pedestal, and the reference center of gravity and the center of gravity measuring device set by the reference center of gravity setting unit Using the measurement center of gravity measured by the movement determination means for determining the movement of the position of the pedestal, a movement control means for causing the driving means to move the position of the pedestal based on the determination result by the movement determination means, A.

  In the second position adjustment system, the control device can perform an operation on the work on the pedestal at the same centroid position as the reference centroid at the position of the pedestal moved after setting the reference centroid. You may have a reference position setting means to set the position of a base to the reference position used as an initial position at the time of work start. Further, after the reference position is set, the movement determination means determines that the position of the pedestal is moved based on the measured center of gravity when the measured center of gravity does not coincide with the reference center of gravity, and when the measured center of gravity coincides with the reference center of gravity, It may be determined to move to the reference position. In addition, the movement determination means determines that the pedestal is moved vertically above the installation surface when the measurement center of gravity is on the work bench side from the reference center of gravity, and when the measurement center of gravity is on the left side of the reference center of gravity, moves the base to the right It may be determined to move the pedestal to the left when the measured center of gravity is on the right side of the reference center of gravity.

  According to the present invention, the work table position adjustment capable of adjusting the position of the work table in real time according to the natural operation during the work of the operator without performing a separate operation that affects the work. A system is realized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are preferred embodiments of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

  First, the configuration of the work bench position adjustment system of the present embodiment will be described. FIG. 1 is a diagram showing a schematic configuration of a worktable position adjustment system according to the present embodiment. The workbench position adjustment system 1 according to the present embodiment includes a center-of-gravity measurement device 10, a control device 20, and a drive device 30.

  The configuration of each device will be described. The center-of-gravity measurement device 10 is a device that measures the center-of-gravity position of an operator, and includes a sensor unit 11, a center-of-gravity position data conversion unit 12, and an I / F unit 13. The sensor unit 11 detects the weight of the user on the measurement table as pressure applied to a plurality of regions of the measurement table, and acquires pressure data of each region. The center-of-gravity position data conversion unit 12 generates the center-of-gravity position data of the worker using the pressure data acquired by the sensor unit 11. The center-of-gravity position data includes the pressure data of the entire region and the center-of-gravity position obtained based on these pressure data. For example, when the pressure data in the area close to the work table is larger than the other areas, the center of gravity position is the front (work table side), and the pressure data in the left area with the work table in front is larger than the other areas. Then the center of gravity is on the left. The I / F unit 13 sends the data of the centroid position generated by the centroid position data conversion unit 12 to the control device 20.

  The control device 20 is a device that controls the drive device 30 based on the data of the centroid position from the centroid measurement device 10, and includes a control unit 21, a storage unit 22, and an I / F unit 23. The control unit 21 performs drive control of the drive device 30 as will be described later in accordance with a program stored in the storage unit 22. The storage unit 22 has a working storage area for temporarily holding various data used in the control, in addition to the storage area for storing the drive control program according to the present invention. The I / F unit 23 sends control data from the control unit 21 to the drive device 30.

  The drive device 30 is a device that is provided on the work table together with the pedestal and moves the position of the pedestal, and includes a power conversion unit 31, a drive unit 32, and an I / F unit 33. The power conversion unit 31 interprets the control data received from the control device 20, converts it into data for operating the drive unit 32, and sends the data to the drive unit 32. Based on the data from the power conversion unit 31, the drive unit 32 moves the pedestal of the work table up and down (up and down) in the vertical direction of the installation surface, or moves the pedestal up and down and left and right on the same plane. The I / F unit 33 receives control data from the control device 20.

  FIG. 2 is a diagram illustrating functional blocks of the control device 20 of the present embodiment. The control unit 21 of the control device 20 logically includes a reference centroid setting unit 211, a reference position setting unit 212, a movement determination unit 213, and a movement control unit 214.

  The reference center-of-gravity setting unit 211 guides the operator so that it stands perpendicular to the installation surface, and sets the center-of-gravity position measured by the center-of-gravity measuring device after guidance to a reference center of gravity that is a reference for the position movement of the base. The reference position setting unit 212 sets the position of the pedestal where the worker can work on the work on the pedestal at the same center of gravity position as the reference center of gravity as the initial position at the start of work. The movement determination unit 213 compares the reference center of gravity set by the reference center of gravity setting unit 211 with the center of gravity position (measurement center of gravity) acquired from the center of gravity measuring apparatus 10 as needed, and determines whether or not to move the position of the base. To determine whether to move. The movement control unit 214 generates control data based on the determination result by the movement determination unit 213 and sends the control data to the driving device 30 to perform drive control.

  Next, the configuration of the work bench position adjustment system of the present embodiment will be described. In the workbench position adjustment system according to the present embodiment, data necessary for position adjustment of a workbench base is set before an operator performs work on the system. In other words, the control operation performed in this system is divided into two phases: setting of data necessary for pedestal position adjustment (basic setting process) and pedestal position adjustment during work operation (position adjustment process).

  First, the basic setting process will be described with reference to FIGS. FIG. 3 is a diagram for explaining basic setting processing in the work bench position adjustment system of the present embodiment. In this system, the reference center of gravity and the reference position before work are set as basic setting processing. First, a main work (main work object) is placed on a pedestal of a workbench, and the control device is turned on in a state where the operator has descended from the center of gravity measurement device, and preparations for basic setting processing are performed (FIG. 3). (A)).

  Next, after the operator gets on the center of gravity measuring device, the control device guides the operator to stand perpendicular to the installation surface of the device, and the center of gravity measuring device follows the guidance when the worker stands vertically. Measure the center of gravity position. The center-of-gravity measurement device sends the measured center-of-gravity position to the control device, and the control device sets the center-of-gravity position received from the center-of-gravity measurement device as the reference center of gravity (FIG. 3B). The reference centroid is a centroid position that serves as a reference when the position of the pedestal is moved. At this stage, there is a difference between the position of the operator's hand and the position of the main work on the workbench (the main work cannot be reached even if the operator extends his hand while standing upright. ).

  Subsequently, the worker changes his / her posture in order to reach the main work on the pedestal (weight is applied to the front part of the foot), and as a result, the center of gravity moves (FIG. 3C). The center-of-gravity measuring device measures the position of the center of gravity after the posture change and sends it to the control device, and the control device operates the actuator in response to the change in the position of the center of gravity to raise the pedestal. When the main work on the raised pedestal reaches the operator's extended hand and the worker's posture becomes straight (when the worker's center of gravity matches the reference center of gravity), the control device The operation is stopped, and the height of the work table at this time is set to the reference height (FIG. 3D). The reference height is the position of the pedestal where the worker can work on the work on the pedestal at the same center of gravity as the reference center of gravity.

  FIG. 5 is a flowchart showing the flow of basic setting processing in the work bench position adjustment system of the present embodiment. First, the reference center-of-gravity setting unit 211 of the control unit 2 starts setting the reference center of gravity (step S101), and performs voice guidance to the operator "Stand up straight" (step S102). The guidance to the worker may be a screen guidance (display display) in addition to the voice guidance, and may be a message having such a content as to stand vertically on the installation surface on the center of gravity measuring device.

  Then, the position of the center of gravity (measured center of gravity) measured by the center of gravity measuring device after the voice guidance is acquired (step S103), and this measured center of gravity is set as the reference center of gravity (step S104). Note that the data of the center of gravity position set as the reference center of gravity is stored in the storage unit 22, and is read out as necessary and used for control.

  Subsequently, the reference position setting unit 212 starts setting the reference position (step S105). Further, the reference position setting unit 212 periodically acquires the measurement center of gravity from the center of gravity measurement device and sends the data of the measurement center of gravity to the movement determination unit 213 (step S106). The movement determination means 213 compares the measured center of gravity with the reference center of gravity, and determines whether or not to operate the actuator and how to operate it (step S107). Then, the movement determination unit 213 sends the determination result to the movement control unit 214, and the movement control unit 214 generates control data based on this determination result and sends it to the actuator.

  Specifically, if the measured center of gravity and the reference center of gravity do not match (step S107 / NO), the movement determination unit 213 determines that position movement by the actuator is necessary, and also determines that the pedestal is moved in a direction corresponding to the measurement center of gravity. The movement control means 214 sends control data based on the determination result to the actuator (step S108). That is, control data for raising the position of the base is sent to the actuator. On the other hand, when the measured center of gravity coincides with the reference center of gravity (step S107 / YES), the movement determination unit 213 determines that position movement by the actuator is unnecessary, and the movement control unit 214 transmits control data based on this determination result to the actuator. It is sent out (step S109). That is, control data for stopping the operation of the actuator is transmitted.

  Then, the reference position setting means 212 sets the position of the pedestal where the measured center of gravity obtained after the start of the reference position setting and the reference center of gravity coincide and the operation of the actuator is stopped is set as the reference position (step S110). The data of the reference position is held in the storage unit 22 as in the case of the reference centroid, and is read out as needed and used for control.

  Next, the position adjustment process will be described with reference to FIGS. FIG. 4 is a diagram for explaining position adjustment processing in the work bench position adjustment system of the present embodiment. In this system, the position of the pedestal is adjusted during work using the reference center of gravity and the reference position obtained in the basic setting process. This position adjustment process is not necessary when only the main work is handled, but it is an auxiliary work object that is in a different location from the main work or has a height difference from the main work ( Necessary when handling auxiliary work).

  For example, if an auxiliary work is placed in or next to the main work and the height of the auxiliary work from the pedestal is lower than the main work, the worker can reach out with a reference center of gravity. Auxiliary work cannot be taken (FIG. 4 (a)). For this reason, the worker changes his / her posture in order to reach the auxiliary work on the base (weight is applied to the front part of the foot or one side of the body), and as a result, the center of gravity moves (FIG. 4B). .

  The center-of-gravity measurement device measures the position of the center of gravity after the posture change and sends it to the control device. The control device operates the actuator in response to the change in the position of the center of gravity, and moves the position of the base. The direction of moving the pedestal is upward (in the direction of raising) perpendicular to the installation surface when the operator's center of gravity moves to the front part of the foot (workbench side). When moved to the right side, it is on the left side (FIG. 4C).

  When the pedestal moves according to the change in the center of gravity of the worker, the auxiliary work on the pedestal reaches the hand extended by the worker, and the posture of the worker becomes straight (the position of the center of gravity of the worker is the reference At the time when it coincides with the center of gravity, the control device drives the actuator so as to return the position of the moved base to the reference position (FIG. 4D).

  FIG. 6 is a flowchart showing a flow of position adjustment processing in the work bench position adjustment system of the present embodiment. The movement determination means 213 confirms whether or not the measured center of gravity has been acquired from the center of gravity measuring device after setting the reference position (step S201). If the measurement center of gravity has not been acquired (step S201 / NO), the movement determination unit 213 determines that the worker is not working on the center of gravity measurement apparatus, and the process ends. On the other hand, when the measured center of gravity is acquired (step S201 / YES), the operator is working using this system, and the movement determination unit 213 subsequently compares the measured center of gravity with the reference center of gravity (step). S202).

  If the measured center of gravity coincides with the reference center of gravity (step S202 / YES), since the operator is working in the state of the reference center of gravity, the movement determination unit 213 determines that the movement of the pedestal is unnecessary. Conversely, if the measured center of gravity and the reference center of gravity do not match (step S202 / NO), the movement determination unit 213 determines that the pedestal needs to be moved and should move the pedestal in which direction depending on the content of the measured centroid. To determine.

  When the measured center of gravity is closer to the work table than the reference center of gravity (step S203 / YES), the movement determination unit 213 determines that the pedestal should be moved vertically upward of the installation surface, and the determination result is given to the movement control unit 214. The movement control means 214 generates control data based on the determination result and sends it to the actuator (step S204).

  If the measured center of gravity is not closer to the workbench side than the reference center of gravity (step S203 / NO), it is confirmed whether the center of gravity is located on the left or right side (step S205). When the measured center of gravity is on the right side of the reference center of gravity (step S205 / YES), the movement determination unit 213 determines that the pedestal should be moved to the left, sends the determination result to the movement control unit 214, and moves the movement control unit. 214 generates control data based on the determination result and sends it to the actuator (step S205). Conversely, when the measured center of gravity is on the left side of the reference center of gravity (step S205 / NO), the movement determination unit 213 determines that the pedestal should be moved to the right, and the movement control unit 214 determines based on the determination result. Then, control data is generated and sent to the actuator (step S207).

  While the measured center of gravity does not match the reference center of gravity (step S208 / NO), the determination and the transmission of control data are continued (steps S203 to S207). On the other hand, when the measured center of gravity coincides with the reference center of gravity (step S208 / YES), the movement determination unit 213 determines that the position of the pedestal should be returned to the reference position, and sends the determination result to the movement control unit 214. The movement control means 214 generates control data based on the determination result and sends it to the actuator (step S209).

  Incidentally, the movement determining means 213 determines that the position of the pedestal is maintained (not moved) in the basic setting process when the measured centroid and the reference centroid coincide with each other, and the position of the pedestal is set as the reference position in the position adjustment process. Judgment to return. In response to these determinations, the movement control unit 214 sends control data for stopping the operation of the actuator in the basic setting process, and sends control data for moving the pedestal to the reference position in the position adjustment process.

  According to this embodiment described above, the operator can wear a device for position adjustment or perform position adjustment operation separately from the work in order to move the pedestal of the work table according to the change in the position of the center of gravity of the worker. It is possible to adjust the position of the workbench without having to do so. Further, since the base of the work table is moved in accordance with the natural movement of the worker during the work operation, the position of the work table can be adjusted in real time without making the worker aware of it. As described above, it is possible to realize a system that reduces the operation burden on the operator and promotes a reduction in physical load.

  The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment alone, and various modifications are made without departing from the gist of the present invention. Implementation is possible.

It is the figure which showed schematic structure of the work-table position adjustment system which concerns on embodiment of this invention. It is the figure which showed the functional block of the control apparatus of the worktable position adjustment system which concerns on embodiment of this invention. It is a figure for demonstrating the basic setting process in the worktable position adjustment system which concerns on embodiment of this invention. It is a figure for demonstrating the position adjustment process in the worktable position adjustment system which concerns on embodiment of this invention. It is the flowchart which showed the flow of the basic setting process in the worktable position adjustment system which concerns on embodiment of this invention. It is the flowchart which showed the flow of the position adjustment process in the worktable position adjustment system which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work bench position adjustment system 10 Center-of-gravity measuring device 11 Sensor part 12 Center-of-gravity position data conversion part 13,23,33 I / F part 20 Control apparatus 21 Control part 22 Memory | storage part 30 Drive apparatus 31 Power conversion part 32 Drive part 211 Reference | standard gravity center Setting means 212 Reference position setting means 213 Movement determination means 214 Movement control means

Claims (5)

Operator sets the reference centroid centroid position standing perpendicular to the installation surface, the operator sets the position of the row intends pedestal working with the reference centroid in a reference position, the operator of the center of gravity the work table position adjustment system that is characterized in that moving the position of the pedestal from the reference position each time that varies from the reference center of gravity. A driving device for moving a pedestal on which a work is placed vertically in the vertical direction of the installation surface or back and forth and left and right in the same plane, a center of gravity measuring device for measuring the center of gravity of an operator, and controlling the driving device to A control device for adjusting the position of the pedestal,
The controller is
A reference center of gravity setting means for guiding the operator to stand perpendicular to the installation surface, and setting the center of gravity position measured by the center of gravity measuring device after the guidance as a reference center of gravity for the position movement of the pedestal; ,
A movement determination means for performing a determination on the movement of the position of the pedestal using the reference gravity center set by the reference gravity center setting means and the measurement gravity center measured by the gravity center measuring device;
Movement control means for causing the drive device to move the position of the pedestal based on a determination result by the movement determination means;
A workbench position adjustment system comprising: The control device starts the position of the pedestal at which the operator can work on the work on the pedestal at the same center of gravity position as the reference center of gravity at the position of the base moved after the setting of the reference center of gravity. The workbench position adjusting system according to claim 2 , further comprising reference position setting means for setting a reference position which is an initial position at the time. The movement determination means determines that the position of the pedestal is moved based on the measurement gravity center when the measurement gravity center does not coincide with the reference gravity center after setting the reference position, and the measurement gravity center is the reference gravity center. 4. The work table position adjustment system according to claim 3 , wherein if the two positions coincide with each other, a determination is made to move the pedestal to the reference position. The movement determining means determines that the pedestal is moved vertically above the installation surface when the measured center of gravity is on the work bench side from the reference center of gravity, and the measurement center of gravity is on the left side of the reference center of gravity. 5. The work table according to claim 4 , wherein a determination is made to move the pedestal in a right direction and a determination is made to move the pedestal in a left direction when the measured center of gravity is on the right side of the reference centroid. Positioning system.

Images