JP3208466U - Torque wrench with reverse display function - Google Patents

Abstract

A torque wrench with a reverse display function is formed so that a torque value can be normally displayed on a display unit and a reading operation is facilitated regardless of whether a screw, a nut, or the like is for a right tightening or a left tightening. provide. A display unit 2 that digitally displays a torque value in response to a signal from a torque detection sensor 1 is provided. Provided on the body of the wrench body 3. In the case of right torque, the digit drive signal and the character drive signal are output to the display unit 2 as they are, and in the case of left torque, the display position of the minimum digit A1 is switched to the display position of the maximum digit E1 according to the digit drive signal. The wrench body 3 is provided with a control device 5 for outputting a digit switching signal and an inversion signal for inverting a number in accordance with a character driving signal to the display unit 2. [Selection] Figure 1

Description

  The present invention relates to a digital torque wrench that displays torque values numerically. More specifically, the present invention relates to a torque wrench with a reverse display function formed so that a torque value can be displayed correctly and easily even when the rotational direction is reverse.

  Conventionally, as a digital torque wrench, there is one described in Patent Document 1, for example.

  This conventional product is formed with a display unit that digitally displays a torque value in response to a signal from a torque detection sensor. And this display part is provided in the trunk | drum of the wrench main body so that the handle side of a tubular wrench main body may become the minimum digit.

  For this reason, the conventional product displays the torque value normally when using the right rotation, but when using the left rotation, the torque value is reversed for the user at the wrench usage position as shown in FIG. Displayed.

  Therefore, the conventional product has a problem in that it is difficult to read the torque value during this type of use, so that the conventional product has poor usability.

JP 2000-354977 A

The present invention has been proposed in view of such problems of conventional products.
Therefore, the technical problem to be solved by the present invention is that the torque value can be normally displayed on the display section regardless of whether the screw or nut is for right-handed fastening or left-handed fastening. It is an object of the present invention to provide a torque wrench formed so as to be easy to use and easy to use.

The present invention adopts the following technical means in order to solve the above problems.
That is, the torque wrench of the present invention includes a display unit 2 that digitally displays a torque value in response to a signal from the torque detection sensor 1, as shown in FIG. A torque wrench provided on the body of the wrench main body 3 so that the handle 3a side of the main body 3 is the minimum digit A1, and in the case of right torque, the digit driving signal and the character driving signal are used as they are. In the case of left torque, a digit switching signal for switching the display position of the minimum digit A1 to the display position of the maximum digit E1 according to the digit drive signal and an inversion signal for inverting the number according to the character drive signal The control device 5 for outputting to the display unit 2 is provided in the wrench body 3 (Claim 1).

  In this case, the present invention is not limited to programmed logic control by a microcomputer or the like, and may be configured to be performed by wired logic control.

  That is, as another configuration of the present invention, as shown in FIG. 3 and the like, a display unit 2 that digitally displays a torque value in response to a signal from the torque detection sensor 1 is provided. A torque wrench provided on the body of the wrench main body 3 so that the handle 3a side of the wrench main body 3 becomes the minimum digit A1, and detects the direction of torque in response to a signal from the torque detection sensor 1. The right / left torque detection unit 7, the display drive unit 8 that receives the signal from the detection unit 7 and outputs a digit drive signal and a character drive signal, and the digit drive from the display drive unit 8 in the case of right torque The signal and the character drive signal are output to the display unit 2 as they are, and in the case of left torque, the display position of the minimum digit A1 is switched to the display position of the maximum digit E1 according to the digit drive signal from the display drive unit 8. Digit switching signal and display driver 8 is provided with a signal conversion unit 10 that outputs to the display unit 2 an inversion signal that inverts a number in accordance with a character drive signal from 8, and the signal conversion unit 10 is connected to the output side of the display drive unit 8. (Claim 2).

  In this case, in the present invention, instead of the right / left torque detection unit 7, a right / left torque changeover switch 11 may be connected to the signal conversion unit 10 as shown in FIG. ).

  In the present invention, in the case of right torque, the torque value is displayed on the display as it is, and in the case of left torque, the display position of the minimum digit is switched to the display position of the maximum digit, and the number is inverted and displayed. Displayed in the section.

  Therefore, according to the present invention, the torque value is normally displayed regardless of whether the screw or nut is for right-handed tightening or left-handed tightening. It has a practically excellent effect of improving usability.

The torque wrench of this invention is shown, A is a front view and B is a block diagram. It is a flowchart for demonstrating an effect | action of a torque wrench same as the above. It is a block diagram which shows the other structure of a torque wrench same as the above. It is a front view which shows the display state of the left torque value of a torque wrench same as the above. It is a front view which shows a 7 segment number display element. It is a circuit diagram which shows the flow of the signal at the time of right torque. It is a circuit diagram which shows the flow of the signal at the time of left torque. It is a block diagram which shows other embodiment of a torque wrench same as the above. It is a front view which shows the conventional torque wrench.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, the present invention includes a display unit 2 that digitally displays a torque value in response to a signal from the torque detection sensor 1, and the display unit 2 is provided with a tubular wrench body 3. It is provided on the body of the wrench body 3 so that the handle 3a side is the minimum digit A1. The display unit 2 includes a 7-segment display element 4 (see FIG. 5) and is formed in a liquid crystal type.

  Reference numeral 5 denotes a control device such as a microcomputer. The control device 5 is provided on the wrench body 3. Reference numeral 6 denotes a power on / off switch.

  The control device 5 receives the signal from the right / left torque determination unit 5a and the signal from the determination unit 5a, and outputs the digit drive signal and the character drive signal to the display unit 2 as they are in the case of right torque. In the case of the left torque, the display unit 2 displays a digit switching signal for switching the display position of the minimum digit A1 to the display position of the maximum digit E1 according to the digit drive signal and an inversion signal for inverting the number according to the character drive signal. Are provided with an arithmetic circuit 5b and the like.

  Next, an example when the present invention is configured by a logic circuit will be described with reference to FIG. The same members and portions as those in the above example are denoted by the same reference numerals, and detailed description thereof is omitted.

  Reference numeral 7 denotes a right / left torque detection unit that receives a signal from the torque detection sensor 1 and detects the direction of the torque. Reference numeral 8 denotes a display drive unit that receives a signal from the detection unit 7 and outputs a digit drive signal and a character drive signal.

  An A / D converter 9 is connected between the torque detection sensor 1 and the right / left torque detection unit 7. The analog signal of the torque detection sensor 1 is converted into a digital signal by the A / D converter 9 and sent to the right / left torque detector 7.

  The display driving unit 8 includes a digit signal unit 8a that outputs a digit driving signal and a character signal unit 8b that outputs a character driving signal. In the product of the present invention, a signal conversion unit 10 is connected to the output side of the display driving unit 8.

  The signal conversion unit 10 outputs the digit driving signal and the character driving signal from the display driving unit 8 to the display unit 2 as they are in the case of right torque, and the digit from the display driving unit 8 in the case of left torque. The display unit 2 includes a digit switching signal for switching the display position of the minimum digit A1 to the display position of the maximum digit E1 according to the drive signal and an inversion signal for inverting the number according to the character drive signal from the display drive unit 8. Is configured to output.

  Reference numeral 10a denotes a digit switching signal output unit. Reference numeral 10b denotes an inverted signal output unit. The digit switching signal output unit 10a is connected to the digit signal unit 8a. The inverted signal output unit 10b is connected to the character signal unit 8b. The signal conversion unit 10 is connected to the right / left torque detection unit 7 described above.

  FIG. 6 is a circuit diagram showing a signal flow between the signal conversion unit 10 and the display unit 2 in the case of right torque. FIG. 7 is a circuit diagram showing a signal flow in the case of left torque.

  Next, the relationship between the character drive signal and the 7-segment numeric display element 4 will be described for only one digit, but the same applies to other digits. Further, for convenience of explanation, in this embodiment, a case where a 4-digit number is displayed on the display unit 2 will be described as an example.

  In FIG. 6 and the like, A to D are digit driving signals output from the digit signal unit 8a. In the present invention, these signals are input to the display elements 4 of the digits A1 to D1 of the display unit 2 via the digit switching signal output unit 10a, respectively. Is connected.

  In this case, A1 is the least significant digit. B1 is the second digit of the tens place, and C1 is the third digit of the hundreds place. D1 is the fourth digit, which is the thousandth place, and E1 is the fifth digit, which is the tens place.

  Further, a to g are character drive signals output from the character signal unit 8b. The inverted signal output unit 10b and the display element 4 are connected so that these signals are input to the segments a1 to g1 of the display element 4 via the inverted signal output unit 10b of the signal conversion unit 10, respectively. ing.

  E is a right / left torque signal output from the right / left torque detector 7. N is a logic circuit that conducts a signal when the signal from the right / left torque detector 7 is right torque, and R is a signal that conducts when the signal from the right / left torque detector 7 is left torque. This is a logic circuit.

  If the measured torque value is “1234” and right torque, the digit drive signal A is A1, B is B1, C is C1, and D is D, as shown by a thick line in FIG. Join D1 respectively. The character drive signals b, c, f, and g are added to the element segments b1, c1, f1, and g1, and as a result, “4” is displayed in the small digit A1.

  In the case of the left torque, as shown by a thick line in FIG. 7, the digit driving signal A is added to E1, B is added to D1, C is added to C1, and D is added to B1. The character drive signal b is added to the segment e1, c is added to f1, f is added to c1, and g is added to g1. As a result, as shown in FIG. 4, “4” is inverted and displayed on E1, “1” is displayed on B1, “2” is displayed on C1, and “3” is displayed on D1. The

  In the above process, the present invention replaces the right / left torque detection unit 7 with the signal conversion unit 10 and replaces the signal conversion unit 10 with a right / left torque changeover switch 11 as shown in FIG. It may be connected to the unit 10. In this case, the operator switches the switch 11 in advance and applies a torque switching signal to the signal conversion unit 10.

1 Torque detection sensor 2 Display 3 Wrench body 3a Handle 5 Control device A1 Minimum digit E1 Maximum digit

Claims (3)

  A display unit that digitally displays a torque value in response to a signal from the torque detection sensor is provided, and this display unit is provided on the body of the wrench body so that the handle side of the tubular wrench body has the smallest digit. This is a torque wrench that outputs the digit drive signal and character drive signal as they are to the above display for right torque, and displays the minimum digit display position according to the digit drive signal for left torque. An inversion display function characterized in that a control device for outputting to the display unit a digit switching signal for switching to a position and an inversion signal for inverting a number in accordance with a character drive signal is provided in the wrench body. Torque wrench with.   A display unit that digitally displays a torque value in response to a signal from the torque detection sensor is provided, and this display unit is provided on the body of the wrench body so that the handle side of the tubular wrench body has the smallest digit. A torque wrench, which receives a signal from the torque detection sensor and detects a torque direction, a right / left torque detection unit, and receives a signal from the detection unit and outputs a digit driving signal and a character driving signal. In the case of the right torque, the digit driving signal and the character driving signal from the display driving unit are output to the display unit as they are, and in the case of the left torque, the digit driving signal is output from the display driving unit. A signal switching unit that outputs a digit switching signal for switching the display position of the minimum digit to the display position of the maximum digit and an inversion signal that inverts the number in accordance with the character drive signal from the display drive unit to the display unit. Prepared, A torque wrench with an inversion display function, wherein the signal conversion unit is connected to the output side of the display drive unit.   3. A torque wrench with an inversion display function according to claim 2, wherein a right / left torque changeover switch is connected to the signal conversion unit in place of the right / left torque detection unit. A wrench.

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