JP4295063B2 - Electric screwdriver forget screw tightening prevention device - Google Patents

Description

  The present invention relates to a screw tightening forgetting prevention device for an electric screwdriver that automatically counts the number of tightened screws and prevents forgetting tightening when performing a work of tightening a large number of screws with a driver such as an electric screwdriver or an air screwdriver. Is.

  For example, when a large number of screw tightening operations determined by an electric screwdriver are performed, if the screwdriver is screwed one after another by simply leaving it to the operator, there are often places where the screw tightening is forgotten.

  Therefore, conventionally, this device is provided with a counter mechanism that counts the completion of screw tightening by detecting a torque greater than a predetermined value generated in the screwdriver when one screw tightening is completed, and is tightened by the driver connected to this device. A screwdriver having a screw number setting mechanism for presetting the number of power screws, and a work completion notifying mechanism for notifying the completion of work with the driver when the counter mechanism counts up to the number set by the screw number setting mechanism The screw tightening forgetting prevention device is used.

  That is, for example, when a screw is tightened and a torque of a predetermined value or more is generated, it is counted that the screw tightening is completed, and when this count reaches the number that must be tightened with the electric screwdriver in advance, this is notified, It is possible to confirm that all the screws to be tightened have been completed.

  For example, this electric screwdriver is connected to this device and powered and supplied via this device.For example, when a bit at the tip is pressed against a screw, a switch is turned on and a built-in motor is supplied from this device. Rotate with the electric power to turn the bit and tighten the screw. When the screw tightening is completed, a torque of a predetermined value or more is generated. This torque activates the clutch to turn off the motor and output a signal for operating the counter mechanism to the apparatus. It is composed.

JP 61-6474 A

  The above-mentioned conventional screw tightening forgetting prevention device of a driver automatically counts the number of screw tightening, and when the necessary number set in advance is counted, informs that the work has been completed, and conversely if the count number does not reach Because it is not notified, it can prompt the user to forget to tighten the screw, so the effect of preventing forgetting to tighten can be obtained, but the screw is bad or not tightened properly and the screw is not tightened enough. Since the screw stops due to galling in the middle, a torque of a predetermined value or more is generated and may be counted despite being incomplete.

  In other words, even if it is not fully tightened, it will count when torque is detected, so even if it is reported that the work has been completed by counting all, there may be places where tightening is insufficient. In this case, it may not be easily found even in the inspection and may be overlooked.

  The present invention reliably solves these problems, and even if there is insufficient tightening, it cannot be overlooked by simple improvements. It is an object of the present invention to provide an epoch-making prevention device for screw tightening of an electric screwdriver that can surely complete the tightening operation without forgetting tightening.

  The gist of the present invention will be described with reference to the accompanying drawings.

A counter mechanism that counts the completion of screw tightening by detecting a torque greater than a predetermined value that occurs in the electric screwdriver when screw tightening is completed, and sets the number of screws to be set in advance by the connected electric screwdriver In a device for preventing screw tightening forgotten by an electric screwdriver comprising a mechanism and a work completion notifying mechanism for notifying the completion of work when the counter mechanism counts up to the number set by the screw number setting mechanism, the operation of the electric screwdriver is controlled. When a torque greater than or equal to a predetermined value generated in the electric screwdriver is detected before the elapse of a predetermined time from the start of screw tightening work as a starting point, or after a predetermined time range exceeding the minimum tightening time that is the predetermined time , in the case of detecting a predetermined value or more torque generated Also tightening the screw when the deviation is provided a defect count prevention mechanism is not performed the count as being defective, at the predetermined time range of the counter mechanism exceeds the minimum required time tightening the counter start occurs a torque signal is configured to count operated only when it is output, the minimum required time tightening advance variably set in accordance with the defect count prevention Kishime Me with a minimum required time before the mechanism, the length of the screw tightening provided with a set Organization to the counter mechanism, informing the time-over when not count up the number set with time over setting mechanism for setting a screwing operation timed, by the number setting mechanism in this preset screw tightening operation time period in time over A plurality of notification mechanisms and the electric screwdriver are connected, and driving force is supplied. During the tightening operation of one electric screwdriver, the driving force is not supplied to the other electric screwdriver, and until the tightening operation is completed with the one electric screwdriver and the work completion notification mechanism is activated, The other electric screwdriver is provided with a driving force supply control mechanism for preventing the tightening operation from being performed without supplying the driving force, and relates to a device for preventing screw tightening of the electric screwdriver.

  In addition, the screw tightening operation period is not set between the time when the tightening operation is completed with the one electric screw driver among the plurality of electric drivers and the time when the operation is started with the other electric screw driver. The present invention relates to a device for preventing screw tightening of an electric screwdriver according to claim 1.

  In addition, the screw number setting mechanism and the minimum required time setting mechanism can be set from the outside via a net, and the operating status of at least one of the mechanisms via the net is set. The electric screwdriver forgetting screw tightening prevention device according to any one of claims 1 and 2, characterized in that the device can be obtained from the outside.

  Since the present invention is configured as described above, even if there is insufficient tightening, it will not be overlooked by simple improvement, and if there is forgotten tightening or insufficient tightening, this will be ensured by the operator. This is a revolutionary electric screwdriver forgetting screw tightening prevention device that ensures that all tightening operations can be completed without fail.

  In addition, the present invention can urge the driver to forget to tighten or insufficiently tighten each driver to be connected more than once, and further improve the electric motor that will surely complete the work for each driver. It becomes a device to prevent screw tightening of drivers.

  According to a third aspect of the present invention, there is provided a device for preventing forgotten screw tightening of an electric screwdriver that can be remotely operated, can easily grasp the work situation and actual work at a remote place, and is more convenient for work management. Become.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode of the present invention considered to be suitable (how best to carry out the invention) will be briefly described with reference to the drawings showing the effects of the present invention.

  A screwdriver is connected to the apparatus, and the number of screws to be tightened with the screwdriver is set in advance by a screw number setting mechanism, and the minimum tightening predetermined time is set by the minimum tightening time setting mechanism according to the length of the screw.

  The time over time (screw tightening time limit) is set by the time over setting mechanism in consideration of the total work time by the driver.

  Accordingly, when each screw is tightened by the driver, the counter mechanism is activated when the torque that can be determined to be complete at each screw tightening is detected, and the counting operation is performed. When this count reaches the preset number, the work completion notification mechanism is activated to notify that the necessary number of screw tightenings have been completed by the driver, and the operator can confirm the completion.

  In this device, the minimum required tightening time is set according to the length of the screw, so if the torque is detected before this time elapses, it is fully tightened by the fault count prevention mechanism. It is not rare and is not counted as a tightening failure.

  Therefore, for example, when the screw is fastened in the middle of tightening and is not sufficiently tightened, even if torque is generated, it is not forcibly counted.

  Therefore, even if the operator thinks that all the screw tightening has been completed, for example, it is not counted even if the operator thinks that the motor has stopped due to, for example, torque, or the bit has idled and the tightening has been completed. The set number is not reached and no completion notification is made.

  Therefore, you will be prompted if you have forgotten to tighten it.

  Further, according to the present invention, when the state not counted up to the set number continues until a preset screw tightening work time limit, the time over notification mechanism notifies the worker that the work has not been completed yet as a time over.

  Therefore, if the work is not yet completed by the time-over notification mechanism, you will be notified whenever the screw tightening time limit is exceeded, and you will not forget to tighten the screw without knowing it, or it will not remain fully tightened. In that case, the user is always notified to notify that there is a forgotten tightening or a defect.

  In addition, when multiple drivers are connected to this device, the driving force is not supplied to other drivers (for example, power supply or air supply) during the tightening operation of one driver to which the driving force is supplied. Until the tightening operation is completed with the one driver and the operation completion notification mechanism is activated, the other driver is not supplied with driving force (for example, power supply or air supply) and cannot be tightened. When the driving force supply control mechanism is provided, it is possible to more reliably notify the driver of forgetting to tighten the screw and insufficient screwing (defective) for each driver as described above.

  That is, if the work of one driver is not completed properly, the work with the next driver becomes impossible, and at this time, it can be notified that the work of one driver is incomplete.

  In addition, the screw number setting mechanism and the minimum required time setting mechanism can be set from the outside via a net, and the operation status of one or more mechanisms of each mechanism can be externally set via the net. If it is configured so that it can be learned from the above, it is possible to perform remote operation settings and to grasp and manage the work status of each worker at a remote location.

  Specific embodiments of the present invention will be described with reference to the drawings.

  The present invention may be an electric driver using an electric motor or an air driver using an air drive. However, in this embodiment, an electric driver is used, and this is connected to the apparatus to supply power and the built-in motor is rotated by this electric power. The tip bit is rotationally driven.

  In addition, in this embodiment, the electric motor is turned on by pressing the bit against the screw. When torque over a predetermined value is generated by screw tightening, the motor is turned off by the clutch and this torque is detected directly by the clutch, and a pulse signal is generated by this clutch operation, and this is output as a counter start signal to this device. It is configured.

  Therefore, the counter mechanism provided in the present apparatus employs a counter device that sequentially counts and displays the counter start signal as it is input. In addition, this counter device is provided with a screw number setting mechanism that can set the number of work to be worked with this driver in advance, and when the count number reaches this number, a work completion notification mechanism constituted by a lamp and a buzzer is activated. is doing.

Further, this counter device is provided with a defect count prevention mechanism. Even if the counter start signal is output within the minimum required time for tightening, the defect count prevention mechanism cancels the counter start signal and does not start the count.

Specifically, the counter device operates only when a torque is generated and a counter start signal is output within a predetermined time range exceeding a predetermined time (minimum required time) after the electric motor is turned ON. Is configured to count.

  As a result, if the torque is generated by tightening and stopping immediately after starting to rotate the bit clearly, it is not screwed in enough yet, and it is configured so that it is not counted as defective due to insufficient screwing. Yes. In other words, if you set the minimum time that must be required for the screw to be fully screwed, and if the screw stops instantaneously before this time and torque occurs, the screwing cannot be complete. The counting is not performed because it is incomplete.

  This minimum required time needs to be set longer as the screw is longer, and by appropriately variably adjusting according to the length of the screw, an insufficient tightening state defect can be detected more reliably.

  In this embodiment, it is possible to change and adjust in several steps according to the length of the screw.

  Further, in this embodiment, the time required for tightening by the driver is taken into consideration, and a work time limit that is a work target is set in the time-over setting mechanism, and when the work completion notification mechanism does not notify completion even when the time limit is exceeded. The operator is informed that it has not been completed yet.

  As a result, at least when this work time limit is reached, the worker can check whether the work has been completed or not. The operator can be notified and prompted to correct it.

  Therefore, even if the operator thinks that it is tightened, the defect count prevention mechanism will not count unless it is screwed in enough, so if the work has not reached the required number and the work has not been completed, the work set in the time over setting mechanism This is notified when the time limit is exceeded. It is therefore possible to ensure that the operator has insufficient tightening.

  In this embodiment, during the tightening operation of one driver to which driving force is supplied, the driving force is not supplied to the other driver. For example, while working with one electric screwdriver, the power supply to the other electric screwdriver is turned off and cannot be used. Furthermore, a driving force supply control mechanism is provided so that the other driver is not supplied with power and cannot be tightened until the work completion notification mechanism is activated after the tightening operation is completed with one driver. ing.

  In addition, the screw number setting mechanism and the minimum required time setting mechanism can be set from the outside via a net, and the operating status of each mechanism can be known from the outside via the net. It is configured.

  1 and 2 show an embodiment of a type in which two electric drivers are connected.

  In the COUNTER Display, the screwed numerical value is displayed. In other words, the counter is a count display unit of a counter device that displays the current count number although torque is automatically generated and counted.

  COUNT DOWN SW is a switch that is pressed when it is desired to return the count as necessary.

  PRESET sets a numerical value to be screwed to one operation of the driver in the setting unit and the display unit of the screw number setting mechanism. When the set numerical value is screwed, a buzzer as a work completion notification mechanism sounds and GOOD lights up. The setting becomes effective when the power is turned on after setting a numerical value. When changing the setting, turn the power on again after the change.

  TIME UP OVER is a setting display section of the time over setting mechanism. When the driver is started to be used (COUNTER Display is other than “00”), the TIME OUT (timer) is activated and the driver is set during the set time (by the work time limit). If the GOOD LED of the work completion notification mechanism is not turned on, the NG LED provided as the time-over notification mechanism is turned on and a buzzer sounds. The TIME OUT time can be adjusted and set from a minimum of 0 minutes to a maximum of 10 minutes.

  COUNT UP TIMER is the setting display section of the minimum required time setting mechanism of the defect count prevention mechanism. When the screwing is finished before the hatched portion in FIG. 3, it is not counted and is screwed at the hatched portion to torque. It is counted when it is detected. The set value can be adjusted according to the length of the screw to be used, and can be adjusted within a range of about 0 to 1 minute.

  The WORK LED indicates that the machine is in operation.

  As described above, the GOOD LED lights up and sounds a buzzer when screwed to the preset value of PRESET, and is a notification unit of the work completion notification mechanism.

  The NG LED is turned on when the set value of TIME OUT TIMER (time over setting mechanism) is exceeded, and is a notification unit of the time over notification mechanism.

  Therefore, connect the driver and this machine, adjust the driver bit and driver torque, and set the value in PRESET in advance. Also, COUNT UP TIMER is set according to the length of the screw (actually set by performing screwing work). As a result, when the value set in PRESET is reached, the GOOD LED is turned on and a buzzer sounds. If this GOOD LED does not light for a predetermined time, the NG LED is lit by TIME UP OVER.

  In the present embodiment, two drivers can be connected, and each mechanism is provided so that display and adjustment can be set. The COUNTER Display is common, and when WORK A is lit, the count number on the driver A side is displayed, and when WORK B is lit, the count number on the driver B side is displayed.

  TIME OUT (TIME OUT OVER) means that when the work moves from driver A to driver B (when the counter is “00”), the worker may do some other work. It is necessary to confirm that the TIME OUT is activated when the driver B is started and the driver B is started (except for “00”), and basically the GOOD LED lights up (buzzer sound “Peepy”). is there.

  The operation of the driver when these two are connected will be described. When a numerical value is set in DRIVER A PRESET, the WORK A LED is lit and the driver A can be operated. When the WORK A LED is lit, the power source of the driver B does not operate.

  When the operation of the driver A is completed and the control is transferred to the driver B (WORK A LED is turned off and the WORK B LED is turned on), the driver B can be operated.

  Further, DRIVER A TIMER (COUNT UP OVER for driver A) and DRIVER B TIMER (COUNT UP OVER for driver B) need to be adjusted according to the length of the screw used. Longer screws make the setting longer, shorter screws make the setting shorter. Only DRIVER B side is valid for TIME OUT. A buzzer sounds when the time set for TIME OUT has elapsed.

  Therefore, the operation of turning on the power is started. When the driver A is used, the control is transferred to the driver B when the value set in DRIVER A PRESET is reached. When the value set for DRIVER B DRIVER B PRESET is reached, the GOOD LED lights up and a buzzer sounds. When a numerical value is set in DRIVER A PRESET, control is transferred to driver A.

  For TIME OUT, DRIVER A TIMER, and DRIVER B TIMER, the time can be changed in four stages. The setting is 0 to 1 second, 0 to 10 seconds, 0 to 1 minute, and 0 to 10 minutes, and TIME OUT can be set in the same manner as described above. DRIVER TIMER (COUNT UP OVER) can be set in the same manner as described above.

  Note that the present invention is not limited to the embodiments, and the specific configuration of each component can be designed as appropriate.

It is a description perspective view of a present Example. It is a front view of this apparatus for demonstrating schematic structure of a present Example. It is explanatory drawing of the defect count prevention mechanism of a present Example.

Claims (3)

A counter mechanism that counts the completion of screw tightening by detecting a torque greater than a predetermined value that occurs in the electric screwdriver when screw tightening is completed, and sets the number of screws to be set in advance by the connected electric screwdriver In a device for preventing screw tightening forgotten by an electric screwdriver comprising a mechanism and a work completion notifying mechanism for notifying the completion of work when the counter mechanism counts up to the number set by the screw number setting mechanism, the operation of the electric screwdriver is controlled. When a torque greater than or equal to a predetermined value generated in the electric screwdriver is detected before the elapse of a predetermined time from the start of screw tightening work as a starting point, or after a predetermined time range exceeding the minimum tightening time that is the predetermined time , in the case of detecting a predetermined value or more torque generated Also tightening the screw when the deviation is provided a defect count prevention mechanism is not performed the count as being defective, at the predetermined time range of the counter mechanism exceeds the minimum required time tightening the counter start occurs a torque signal is configured to count operated only when it is output, the minimum required time tightening advance variably set in accordance with the defect count prevention Kishime Me with a minimum required time before the mechanism, the length of the screw tightening provided with a set Organization to the counter mechanism, informing the time-over when not count up the number set with time over setting mechanism for setting a screwing operation timed, by the number setting mechanism in this preset screw tightening operation time period in time over A plurality of notification mechanisms and the electric screwdriver are connected, and driving force is supplied. During the tightening operation of one electric screwdriver, the driving force is not supplied to the other electric screwdriver, and until the tightening operation is completed with the one electric screwdriver and the work completion notification mechanism is activated, A driving force supply control mechanism that prevents the other electric screwdriver from being supplied with driving force and cannot perform tightening operation.   The screw tightening operation time period is not set between a time point when the tightening operation is completed with the one electric screw driver among the plurality of electric screw drivers and a time when the operation is started with the other electric screw driver. Item 1. An apparatus for preventing screw tightening of an electric screwdriver according to Item 1.   The screw number setting mechanism and the minimum required time setting mechanism can be set from the outside via a net, and the operating status of at least one of the mechanisms can be externally set via the net. The device for preventing screw tightening of an electric screwdriver according to any one of claims 1 and 2, wherein the device is configured to be known.

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