JP2012223869A - Workbench system - Google Patents

Abstract

Information necessary for adjusting the height of a top plate provided on a workbench is input without a setting operation by a user.
The work table is raised and lowered by a height adjusting mechanism 44 having a drive source. The distance sensor 20 measures the appearance of the user entering and exiting the space where the work table is installed without contact, and the distance data processing unit 31 obtains the height of the user using the output of the distance sensor 20. The user estimation unit 33 determines an appropriate height of the top plate for the user from the height of the user. Further, the height adjustment control unit 43 controls the height adjustment mechanism 44 so that the height of the top plate matches the height obtained by the user estimation unit 33.
[Selection] Figure 1

Description

  The present invention relates to a workbench system in which the height of a top plate provided on a workbench is adjusted so as to match the body shape of a user.

  2. Description of the Related Art Conventionally, a device that automatically adjusts the height of a seat, the height of a desk, the angle of a seat back, and the like during VDT work or vehicle driving work in an office has been proposed (for example, Patent Document 1). reference). In patent document 1, the adjustment suitable for a user's body is performed by using three-dimensional information like the size of a user's body. Patent Document 1 describes a configuration in which a user inputs 3D information during work, and a configuration in which 3D information that is measured in advance and stored in a physical information server, an ID card, or the like is read and used.

JP 2002-78566 A

  In the configuration described in Patent Document 1, it is necessary for the user to input 3D information before starting the operation or to read the user's 3D information measured and stored in advance. . That is, there is a problem that work for setting the three-dimensional information is required every time work is performed, which is troublesome.

  An object of the present invention is to provide a workbench system in which information necessary for adjusting the height of a top plate provided on a workbench is input without a setting work by a user.

  In order to achieve the above object, the present invention provides a work table in which the height of the top plate is raised and lowered using a drive source and the external shape of the user entering and exiting the space where the work table is installed in a non-contact manner. A measurement device to be measured, a user estimation unit that determines an appropriate height of the top plate for the user using the appearance shape of the user measured by the measurement device, and a user estimation unit that determines the height of the top plate And a height adjustment control unit that controls the drive source so as to match the obtained height.

  In this work table system, it is preferable that the height adjustment control unit includes a first operation input device for instructing an operation start of the drive source.

  In this workbench system, a user storage unit that stores at least one of the appearance shape of the user measured by the measurement device and the height obtained by the user estimation unit, and information stored in the user storage unit It is preferable that the user estimation unit includes a second operation input device that performs a selection operation, and the user estimation unit determines an appropriate height of the top board based on information selected by the second operation input device.

  The work table system includes an object detection unit that detects a possibility that the object falls from the top plate from at least one of the position of the object and the movement of the object on the top plate, and the height adjustment control unit is configured to It is preferable to limit the adjustment of the height of the top plate when detecting the possibility of the object falling.

  In this work table system, the article detection unit detects the possibility that the object will fall from the top plate based on a change in the position of the object on the top plate, and the height adjustment control unit detects that the object detection unit has dropped the object. If the possibility of this is detected, it is preferable to reduce the speed at which the height of the top plate is changed.

  This work table system includes a height input device that performs an input operation of a fine adjustment value with respect to the height of the top plate, and the user estimation unit is input from the height input device to the determined height of the top plate. It is preferable to reflect the fine adjustment value.

  In this work table system, the work table system includes a history storage unit that stores the height of the top plate including fine adjustment values when the user uses the work table as a history, and the user estimation unit is a user measured by the measurement device. It is preferable to determine an appropriate height of the top plate with respect to the user using the history together with the appearance shape.

  According to the configuration of the present invention, since information necessary for adjusting the height of the top plate provided on the workbench is input without setting work, convenience when using the workbench is improved. .

It is a block diagram which shows embodiment. It is a figure which shows the relationship between the reference plane in the same as the above, a detection surface, and a distance sensor. It is a figure which shows the concept of the coordinate transformation in the same as the above. It is operation | movement explanatory drawing which shows the process sequence which distinguishes a user in the same as the above. It is a figure which shows the example of extraction of a height in the same as the above. It is operation | movement explanatory drawing which shows the determination procedure of the moving direction in the same as the above. It is a figure which shows the example of the user memory | storage part used for the same as the above. It is operation | movement explanatory drawing of the operation | movement which prevents the fall of an object in the same as the above.

  In the embodiments described below, a facility that includes a top plate such as a sink, a washstand, and a desk and that performs work on the top plate is referred to as a work table. In this kind of work table, if the height of the top plate does not fit the user's body, the load acting around the user's waist, shoulders and neck increases, which contributes to back pain and stiff shoulders. Become. In the following, a device for automatically adapting the height of the top board to the user's body will be described.

  The workbench includes an electric motor that is a drive source for adjusting the height of the top plate, and an elevating mechanism that replaces the driving force of the electric motor with the elevating operation of the top plate. A well-known technique such as a rack and pinion or a pantograph is adopted for the lifting mechanism, but it will not be described in detail here. Hereinafter, the electric motor and the lifting mechanism are collectively referred to as a height adjusting mechanism. When the work table is a sink, a water pipe or a drain pipe is connected. Therefore, an extendable pipe such as a bellows pipe is used as the water pipe or the drain pipe.

  The height of the top plate is measured using a position detection sensor (differential transformer, encoder, etc.) provided separately, or is measured using a sensor (encoder, etc.) attached to the motor to detect the drive amount of the motor. A measurement value obtained by this type of sensor is given to a height adjustment control unit (described later) that controls the height adjustment mechanism, and is used for feedback control of the height of the top board.

  In the present embodiment, in order to determine the height of the work table, a measuring device that measures the external shape of the user entering and exiting the space in which the work table is arranged is disposed. In the following, a case where the space where the work table exists is a room, and the measuring device is arranged at the entrance of the room will be exemplified.

  The measuring device and the height adjustment mechanism of the work table are controlled by an arithmetic processing unit configured by a computer that executes a program for realizing a function described below. The arithmetic processing unit is preferably composed of a built-in microcomputer that executes a program, but will be described below by executing a program such as a personal computer, a DSP (Digital Signal Processor), or an FPGA (Field-Programmable Gate Array). Any device can be used as long as the device realizes the function.

  By the way, as shown in FIG. 2, a frame member 10 such as a door frame is arranged at the entrance of the room, and the frame member 10 defines an area through which the user passes. However, the frame member 10 is not essential, and it is possible to virtually define an area for detecting the user 1 in an opening such as a building or room entrance and a passage such as a corridor. That is, a virtual plane (region) that intersects the direction of passage of the user 1 is defined, and the user 1 that passes through this plane is detected. In the configuration example shown in FIG. In order to define, the frame member 10 is illustrated.

  On the upper part of the frame member 10, a distance sensor 20 is arranged as a measuring device that measures the distance to the object. As shown in the illustrated example, it is desirable that the distance sensor 20 be arranged at the center of the upper portion of the frame member 10, but the position of the distance sensor 20 is not particularly limited. For example, the distance sensor 20 may be disposed on the side instead of the upper part of the frame member 10.

  The illustrated distance sensor 20 measures the distance in a plane (hereinafter referred to as “detection plane”) inclined by a predetermined angle θ with respect to a plane (hereinafter referred to as “reference plane”) surrounded by the frame member 10. When the reference surface 11 defined by the frame member 10 is a vertical surface standing on the floor surface 13, the intersection line of the reference surface 11 and the floor surface 13 is parallel to the intersection line of the detection surface 12 and the floor surface 13. And the distance sensor 20 is disposed on the intersection line between the reference surface 11 and the detection surface 12.

  The distance sensor 20 is not particularly limited as long as the distance sensor 20 can measure the external shape of the user 1 passing through the reference surface 11 surrounded by the frame member 10. For example, a distance sensor 20 based on a principle such as a technique using the principle of triangulation or a TOF (Time Of Flight) method that converts a flight time from light projection to light reception into a distance can be used. Alternatively, it is possible to use the distance sensor 20 based on various principles such as a stereo image method for obtaining three-dimensional information from parallax using a plurality of image sensors and a technique for measuring a distance using ultrasonic wave transmission / reception times. The distance sensor 20 using the TOF method is known to project intensity-modulated light and detect a phase difference from light projection to light reception instead of time.

  In the present embodiment, a distance sensor 20 that projects a light beam scanned in the detection surface 12 and measures the distance by the TOF method is used. In addition, in order to measure the external shape of the user 1 by the distance sensor 20, the angle θ at which the detection surface 12 is inclined with respect to the reference surface 11 is determined so that the whole body of the person is detected when the detection surface 12 passes through the detection surface 12. 12 is set to cross. That is, the angle θ is arbitrarily set in a range between 0 degrees and 90 degrees. However, since the purpose is to detect the user 1 passing through the reference surface 11, the angle θ is preferably set to a relatively small value (for example, about 5 to 20 degrees).

  As described above, since the detection surface 12 is inclined with respect to the reference surface 11, the detection surface 12 scans the whole body of the user 1 when the user 1 moves. That is, since the user 1 moves, the whole body of the user 1 crosses the detection surface 12 without scanning the detection surface 12 up and down.

  The distance data output from the distance sensor 20 is a coordinate value of a polar coordinate system that is a combination of the scanning position of the light beam and the distance. Now, assuming that the distance sensor 20 scans the light beam with an angle φ, and that the distance obtained at the angle φ is d, the distance sensor 20 has a polar coordinate system coordinate (d, φ) as shown in FIG. The value is output as distance data. That is, the distance sensor 20 performs control for scanning the light beam, converts the output of the light receiving element to the distance to the object, and further associates the scanning position of the light beam with the distance by internal processing. Yes.

  Here, the angle φ is set to an appropriate angle interval. The angular interval may be either an equal interval or an unequal interval, and the spatial resolution can be increased as the angular interval is reduced. Further, as described later, when coordinate conversion from the coordinate value (d, φ) of the polar coordinate system to the coordinate value of the orthogonal coordinate system is performed, the spatial resolution in the orthogonal coordinate system changes according to the angle φ. Therefore, it is desirable to set the angular intervals at unequal intervals so that the necessary spatial resolution can be obtained even after the coordinate conversion to the orthogonal coordinate system.

  Hereinafter, the two-dimensional information (distance data group) that is a group of coordinate values obtained by scanning the light beam once in the distance sensor 20 is referred to as a frame like a moving image frame. One frame includes two-dimensional information corresponding to the outline of the external shape of the user 1 when the user 1 is cut by the detection surface 12.

  The arithmetic processing unit is basically extracted by the first process and the first process for extracting information necessary for adjusting the height of the top plate on the work table from the appearance of the user measured by the measuring device. The second process of adjusting the height of the top plate on the work table is performed using the obtained information.

  In the first process, as shown in FIG. 4, the arithmetic processing unit acquires distance data from the distance sensor 20 (S 11), and determines the height of the user based on the coordinate values of the polar coordinate system acquired from the distance sensor 20. Estimate (S12). Further, as will be described later, a process for identifying the user is performed (S13), and it is estimated whether the user enters or leaves the room (S14). When it is estimated that the user has entered the room in step S14, the height of the top plate on the work table is set based on the height of the user estimated in step S12 (S15). Furthermore, the information of the user who exists in a room is updated using the information obtained by step S13, S14 (S16).

  As shown in FIG. 1, the arithmetic processing unit includes a distance data processing unit 31 that acquires distance data output from the distance sensor 20, and a frame storage unit 32 that stores distance data for each frame acquired from the distance sensor 20. Is provided. The distance data processing unit 31 compares the frame acquired from the distance sensor 20 with a background frame stored in the frame storage unit 32 in advance. The background frame is stored in the frame storage unit 32 as a frame when the user has not passed. The frame acquired from the distance sensor 20 and the background frame compare distance data.

If the acquired frame is different from the background frame, the distance data processing unit 31 determines that the user 1 is detected on the detection surface 12. Further, after the user 1 is first detected, the distance data processing unit 31 determines that the user 1 has passed the detection surface 12 when the acquired frame becomes equal to the background frame. Here, for comparison between the background frame and the acquired frame, for example, the difference of the distance d may be obtained for each angle φ that is the same in both frames, and the sum of the differences of the distance d may be evaluated. The sum of the differences between the distance values d (φ) for each angle φ included in the frame acquired from the distance sensor 20 and the background frame is the distance value corresponding to each scanning angle φ, dA (φ), dB (φ ) Is expressed by the following equation.
Σφ | dA (φ) −dB (φ) |
Now, the frame number of the frame at the time when the user 1 candidate is detected on the detection surface 12 is 0, and the frame number of the frame immediately before the user 1 is no longer detected is n. The distance data processing unit 31 acquires frames from the distance sensor 20 at regular time intervals, compares the acquired frames with the background frame, and determines that the frame is different from the background frame. Is used to convert the distance data in the frame into coordinate values (x, y, z) in the orthogonal coordinate system. Further, the coordinate value after conversion is stored in the frame storage unit 32, and the frame number is incremented by 1 for each storage in the frame storage unit 32. This process is continued until the acquired frame can be regarded as the same as the background frame.

  Since the frame number i (i = 0, 1, 2,..., N) substantially corresponds to the distance of the user 1 from the reference plane 11 (distance of the representative point), the value of the z coordinate is the frame number i. Use. That is, the distance data processing unit 31 performs coordinate conversion into a three-dimensional coordinate value (x, y, z) by using the distance data (d, φ) obtained for each frame and the frame number i. As shown in FIG. 3B, the horizontal direction on the reference plane 11 is the x-axis direction, and the vertical direction is the y-axis direction. Furthermore, the direction orthogonal to the reference plane 11 is taken as the z-axis direction. In the x-axis direction, the direction in which the scanning angle φ increases is positive, in the y-axis direction, the upward direction is positive, and in the z-axis direction, the direction from the detection surface 12 to the reference surface 11 is positive.

Here, the origin Od in the orthogonal coordinate system is the position immediately below the distance sensor 20 at the lower end of the frame member 10, and the distance between the origins Op and Od in both coordinate systems (the height dimension of the frame member 10) is h. . Under this condition, the coordinate conversion from the distance data (d, φ) and the frame number i to the coordinate value (x, y, z) of the orthogonal coordinate system is expressed by the following equation.
x = d · sinφ
y = h−d · cos φ
z = i
A series of frames from when a difference between the frame acquired from the distance sensor 20 and the background frame is obtained by the above-described processing until the frame acquired from the distance sensor 20 can be regarded as the same as the background frame is a frame storage unit. 32. When a series of frames is stored in the frame storage unit 32 in this way, the distance data processing unit 31 extracts the height of the user using the stored coordinate values (x, y, z) of the frames. The height is used as physical information for estimating the height of the work table.

  As shown in FIG. 5, the distance data processing unit 31 has a three-dimensional coordinate value (x, y) for each group of frames stored in the frame storage unit 32 (that is, frames having frame numbers i of 0 to n). , Z), the maximum y value is obtained, and this value is regarded as the height H0. Further, the distance data processing unit 31 may use an average value for a predetermined number of y values from the larger one as the height H0 instead of the maximum y value.

  The height H0 obtained by the distance data processing unit 31 is given to the user estimation unit 33. The user estimation unit 33 performs a process corresponding to step S13 shown in FIG. That is, the user estimation unit 33 divides the height H0 into sections for each constant height difference β [cm], and gives a label to the users belonging to each section. The height difference β [cm] is a width set in consideration of the measurement error of the height H0, and the user estimation unit 33 treats a user with a different label (that is, a different classification) as another user. Identify. That is, the label becomes a mark for distinguishing the user. The height difference β is set to 5 [cm], for example.

  After associating the label for identifying the user with the height H0, the user estimating unit 33 determines the traveling direction of the user and determines whether the user has entered or left the room. The traveling direction of the user is determined according to which of the reference surface 11 and the detection surface 12 the user is detected first. Here, the direction in which the user passes through the reference surface 11 after the user is detected on the detection surface 12 is defined as direction A, and the reverse direction is defined as direction B. Here, it is assumed that the direction A is associated with entry and the direction B is associated with exit. However, the direction A and the direction B and the entrance / exit can be related in the opposite direction.

  The user estimation unit 33 identifies whether the user enters or leaves the room from a group of frames. As shown in FIG. 6, the user estimation unit 33 first sets the initial value of the index S for determining the traveling direction to 0 (S21), and sets the frame number i to 1 (S22). It is determined whether or not there is a frame with frame number i in the group of frames stored in the frame storage unit 32 (S23). When there is a frame with the frame number i (S23: Yes), the maximum y value YMAX (i) of the frame with the frame number i and the maximum y value of the frame with the frame number (i-1). The value YMAX (i-1) is compared (S24). Here, when the frame number i is 1, YMAX (i−1) = YMAX (0) = 0.

  When YMAX (i)> YMAX (i-1), the user estimating unit 33 increments the index S (S25). On the other hand, when YMAX (i) ≦ YMAX (i−1), the index S is decremented (S26). That is, the maximum y value increases when the user moves from the detection surface 12 toward the reference surface 11, and the maximum y value when the user moves from the reference surface 11 toward the detection surface 12. The direction of movement of the user is detected by the change in the maximum value of y. After the index S is changed, the frame number i is incremented (S27), and the process returns to step S23 to repeat the above processing.

  When the maximum value of the y values of adjacent frames in time series is sequentially compared for a group of frames stored in the frame storage unit 32, the frame to be compared finally does not exist in the frame storage unit 32. If there is no frame in step S23 (S23: No), it is determined whether the index S obtained for the group of frames is positive or negative (S28). Here, if the index S is positive (S28: Yes), it is determined that the user is moving in the direction A (S29). If the index S is not positive (S28: No), the user is in the direction. It is determined that the user has moved to B (S30). As described above, the user estimation unit 33 determines the direction in which the user moves.

  When the height H0 of the user and the label for the height H0 are determined as described above and the direction of movement of the user is further determined, the second step of adjusting the height of the top plate on the work table is next performed. Move on to processing. The height of the top plate on the work table is measured by the position detection sensor 41, and the height of the top plate detected by the position detection sensor 41 is given to the height adjustment control unit 43 through the object detection unit 42 described later. .

In the second process, the user estimation unit 33 calculates an appropriate height H1 (see FIG. 5) of the top plate on the work table using the height H0 of the user obtained by the distance data processing unit 31. The height H1 of the top board commensurate with the height H0 is calculated using the following relational expression.
H1 = (H0 / 2) + α0 + α1
Here, α0 is an adjustment value of the work table height, and is set according to the type of the work table. As an example, α0 = −10 [cm] is often employed, but α0 = 5 [cm] is employed in a work table such as a sink. Α1 is a fine adjustment value set according to the user's preference, and is determined based on the height input by the user using the height input device 34 (see FIG. 1). Therefore, the fine adjustment value α1 is set for each label given by the user estimation unit 33.

  By the way, there may be a plurality of users in the room. The user estimation unit 33 determines whether the user has entered and exited the room, and since the user's height H0 existing in the room is known from the label given to the user, the user estimation is performed. The unit 33 updates the users existing in the room. That is, the information on the user existing in the room and the information on the user who has used the work table in the past are stored in the user storage unit 35, and the user estimation unit 33 enters and exits the user. As a trigger, the information stored in the user storage unit 35 is updated.

  As shown in FIG. 7A, the user storage unit 35 stores the user's label and height in association with each other as shown in FIG. In addition, the user storage unit 35 uses the height input device 34 for the user who has used the work table in the past, as shown in FIG. 7B, in addition to the user's label and height. A history of the height of the set top plate and an estimated value of the height of the top plate calculated based on the history are stored. That is, the user storage unit 35 also functions as a history storage unit. As the height history of the top plate, a fine adjustment value α1 with respect to a standard top height H1 (= (H0 / 2) + α0) obtained from the height H0 of the user is used. Further, in the illustrated example, the history of the height of the top plate is stored for the past three times, and the average value of the history for the three times is estimated as the height of the favorite top plate and stored in the user storage unit 35. The

  The information stored in the user storage unit 35 is updated when a user who enters or leaves the room is detected by the user estimation unit 33. That is, when the user who enters the room is detected, the label of the user is added to the information shown in FIG. 7A, and when the user who leaves the room is detected, the user is obtained from the information shown in FIG. The label of is deleted.

  As described above, even when there are a plurality of users in a room, the number of people using the work table is often one in a house. In such a case, it is necessary to select a user who uses the work table. The user is selected using the operation input device 36. The operation input device 36 also has a function of giving an instruction to start adjusting the height of the top plate on the work table. In other words, the operation input device 36 functions as both the first operation input device and the second operation input device.

  When the user is selected by the operation input device 36 and an instruction to start the adjustment of the height of the top plate is given, the height adjustment control unit 43 controls the height adjustment mechanism 44 to thereby adjust the height of the top plate. Adjusts the height automatically. In order to adjust the height of the top plate, the height adjustment control unit 43 firstly sets the height of the work table top plate set by the user estimating unit 33 and the top plate detected by the position detection sensor 41. Compare with height. Here, when the height set by the user estimation unit 33 and the height detected by the position detection sensor 41 are different, the height adjustment control unit 43 sets the height detected by the position detection sensor 41 to the user. The height adjustment mechanism 44 is controlled to match the height set by the estimation unit 33. Moreover, the height adjustment control part 43 maintains the height of a top plate, without giving an instruction | indication to the height adjustment mechanism 44, when both height corresponds.

  By the way, when an object is placed on the top plate of the work table, the object may fall from the top plate while the height of the top plate is adjusted by the operation of the height adjusting mechanism 44. For example, if the workbench is a sink, objects such as blades and cracks may be placed on the top plate. Or For this reason, in the present embodiment, an object detection unit 42 that detects whether or not there is an object that is likely to fall on the top board is provided. The object detection unit 42 includes a load sensor or a pressure sensor at the periphery of the top plate of the work table, and may fall during operation of the height adjustment mechanism 44 when an object existing on the periphery of the top plate is detected. Judge as an object.

  The object detection unit 42 may have a function of detecting a range in which a load is applied in at least an area where an object may be placed on the top plate (or the entire surface of the top plate). This function is realized by a sensor in which a large number of pressure sensors are arranged on the top plate, a sensor in which a large number of pressure sensors are arranged on a sheet, a touch sensor for detecting a position where an object is in contact, or the like.

  The object detection unit 42 may include a camera that captures an image of the top surface of the work table top or a distance sensor that measures the distance to the top surface of the work table top. In the object detection unit 42 having these configurations, the movement of the object on the top board is monitored using the change between the state immediately before the height adjustment mechanism 44 operates and the state after the operation is started. Determine the possibility of an object falling.

  When the object detection unit 42 detects an object that may fall, the height adjustment control unit 43 stops the height adjustment mechanism 44. In addition, when the object detection unit 42 has a function of detecting the position of the object on the top board, it is possible to determine a sign of a fall from the direction and speed of the object movement. In this case, the movement speed of the top plate by the height adjusting mechanism 44 is reduced at the time when the sign of the fall of the object is determined.

  The operations of the second process described above are summarized as shown in FIG. First, when the user estimating unit 33 detects a user who enters or leaves the room, the number of users existing in the room is determined (S31). When the user is the first person to enter the room (S31: 1 person), the height adjustment control unit 43 starts adjusting the height of the top plate (S32). On the other hand, when there are a plurality of users (S31: a plurality of users), after the user is selected by the operation input device 36 and an instruction to start the height adjustment is performed (S33), the height of the top plate is adjusted. Adjustment is started (S32). As described above, since the start of height adjustment is instructed by using the operation input device 36, it is possible to prevent the height of the top plate from changing when the user does not intend to use it, and when the work table is used by a plurality of people. But you can work safely. In addition, even when there are multiple people in the room, the work table can be tailored to the height of a specific user, so the height of the top can be adjusted to suit the user who uses the work table preferentially. As a result, user convenience is improved.

  When the adjustment of the height of the top plate is started, the object detector 42 determines whether or not there is a falling object (S34). If it is determined that there is no falling object (S34: No), the object is dropped. Is determined (S35). If there is no sign of an object fall (S35: No), after the height of the top plate is adjusted until the height set by the user estimation unit 33 matches the height detected by the position detection sensor 41, The height adjustment mechanism 44 is stopped (S36).

  If there is a falling object in step S34 (S34: Yes), the height adjusting mechanism 44 is stopped (S37). At this time, the user is notified that the height adjustment has been stopped. If a sign of the object dropping is detected in step S35 (S35: Yes), the speed of movement of the top plate by the height adjusting mechanism 44 is reduced (S38).

  In the above-described operation, the height of the work table top plate is automatically adjusted so as to be the height set by the user estimation unit 33. That is, even if the user does not input his / her height or the like, the height of the work table is automatically adjusted, so that the convenience of the work table is enhanced.

  However, the user can finely adjust the height of the top board by operating the height input device 34. The height input device 34 can adopt a configuration for inputting a fine adjustment value. However, it is more convenient for the user to indicate the height by a sensory word than to indicate the height by a numerical value. Is good. Therefore, in the height input device 34, for example, the height can be adjusted in five stages of “higher”, “slightly higher”, “standard”, “slightly lower”, and “lower”, etc. , +1 [cm], 0 [cm], −1 [cm], −2 [cm] and the like are associated with each other. If the height input device 34 is provided with an operation button for selecting each step, the user can finely adjust the height of the top plate by simply instructing the height using the operation button. It can be carried out. Note that the number of steps and the height adjustment dimension per step are appropriately set.

  As described above, the height set by operating the height input device 34 as described above is only registered as a history in the user storage unit 35 as a difference (fine adjustment value) from the standard height. . Since the history is stored for each label in the user storage unit 35, the user's favorite height is calculated using the history, and the calculated value is also stored in the user storage unit 36. In the example shown in FIG. 7B, the average value of the fine adjustment values as the history is stored in the user storage unit 36 as the fine adjustment value of the user's preference.

1 User 20 Distance sensor (measuring device)
33 User estimation unit 34 Height input device 35 User storage unit (history storage unit)
36 (first and second) operation input devices 42 object detection unit 43 height adjustment control unit 44 height adjustment mechanism

Claims (7)

  A work table in which the height of the top plate is raised and lowered using a drive source, a measurement device that measures the appearance of the user entering and exiting the space where the work table is installed, and the measurement device A user estimation unit that determines an appropriate height of the top plate for the user using the appearance shape of the user, and a height obtained by the user estimation unit for the height of the top plate. A workbench system comprising: a height adjustment control unit that controls the drive source so as to match.   The work table system according to claim 1, wherein the height adjustment control unit includes a first operation input device for instructing an operation start of the drive source.   A user storage unit that stores, as information, at least one of the appearance shape of the user measured by the measurement device and the height obtained by the user estimation unit, and a selection operation for information stored in the user storage unit And a second operation input device that performs the operation, wherein the user estimation unit determines an appropriate height of the top board based on information selected by the second operation input device. Item 3. The workbench system according to Item 1 or 2.   An object detection unit that detects the possibility that the object falls from the top plate from at least one of the position of the object and the movement of the object on the top plate, and the height adjustment control unit includes the object detection unit The workbench system according to any one of claims 1 to 3, wherein when the possibility of the object falling is detected, the adjustment of the height of the top plate is limited.   The article detection unit detects the possibility of the object falling from the top plate based on a change in the position of the object on the top plate, and the height adjustment control unit is configured such that the object detection unit 5. The workbench system according to claim 4, wherein when the possibility of falling is detected, the speed at which the height of the top plate is changed is reduced.   A height input device for performing an operation of inputting a fine adjustment value with respect to the height of the top plate, and the user estimation unit inputs the fine height input from the height input device to the determined height of the top plate. The workbench system according to any one of claims 1 to 5, wherein the adjustment value is reflected.   A history storage unit that stores, as a history, the height of the top plate that includes the fine adjustment value when the user uses the workbench, and the user estimation unit is the use measured by the measurement device The work table system according to claim 6, wherein an appropriate height of the top plate with respect to the user is determined using the history together with an appearance shape of the person.

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