Torque wrench

Abstract

A top surface of a transmitter on a torque wrench is opposed to a position camera, and bolt holes to fix the transmitter to a wrench main body open on the top surface. The bolt holes are formed to four places so as to define a rectangle and extend in a thickness direction of the transmitter. The marker is attached to the top surface of a head of one of the bolts, which extends through a through bolt hole. When the transmitter is fixed to the main body using a bolt, the depth of a large diameter portion of the through bolt hole is larger than the total thickness of the bolt head portion and the marker. Therefore, the marker is disposed lower than an aperture surface of the bolt hole and the possibility of the marker being damaged during work is reduced.

Claims

1. A torque wrench comprising: a main body including a grip section and a lever having a lever head; and at least one accessory fastened by fasteners to the main body, wherein the at least one accessory has a plane imaged by an associated camera for position confirmation, and passage holes of the fasteners open on the plane, and wherein, when the at least one accessory is attached to the main body, a head of the fasteners fall below a plane surface of an aperture of the passage holes of the fasteners open on the plane, and a marker for position confirmation is attached to a top surface of the head of each of the fasteners.

2. The torque wrench according to claim 1, wherein the marker includes markers that are attached to four places that are at rectangular corners of the at least one accessory.

3. The torque wrench according to claim 2, where, in addition to the markers placed on the four rectangular corners of the at least one accessory, the marker further includes two markers added to determine a direction of the torque wrench.

4. The torque wrench according to claim 1, wherein the at least one accessory includes an indicator.

5. The torque wrench according to claim 4, wherein the marker includes markers that are attached to four places that are at rectangular corners of the at least one accessory.

6. The torque wrench according to claim 5, where, in addition to the markers placed on the four rectangular corners of the at least one accessory, the marker further includes two markers added to determine a direction of the torque wrench.

7. The torque wrench according to claim 1, wherein the at least one accessory includes a transmitter.

8. The torque wrench according to claim 7, wherein the marker includes markers that are attached to four places that are at rectangular corners of the at least one accessory.

9. The torque wrench according to claim 8, where, in addition to the markers placed on the four rectangular corners of the at least one accessory, the marker further includes two markers added to determine a direction of the torque wrench.

10. The torque wrench according to claim 1, wherein the fasteners comprise bolts.

11. The torque wrench according to claim 10, wherein the marker includes markers that are attached to four places that are at rectangular corners of the at least one accessory.

12. The torque wrench according to claim 11, where, in addition to the markers placed on the four rectangular corners of the at least one accessory, the marker further includes two markers added to determine a direction of the torque wrench.

13. The torque wrench according to claim 1, wherein the fasteners comprise screws.

14. The torque wrench according to claim 13, wherein the marker includes markers that are attached to four places that are at rectangular corners of the at least one accessory.

15. The torque wrench according to claim 14, where, in addition to the markers placed on the four rectangular corners of the at least one accessory, the marker further includes two markers added to determine a direction of the torque wrench.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 Plane view of the torque wrench of the present invention.

(2) FIG. 2 Side view of the torque wrench of the present invention.

(3) FIG. 3 Expanded sectional view of the essential part of the torque wrench of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

(4) An embodiment of the present invention is explained below based on the attached drawing.

(5) Part of the main body 1 of the torque wrench is a grip section 2 and an indicator 3 and a transmitter 4 is attached to other portions of the main body 1.

(6) The indicator 3 is provided with an indication area 5 digitally indicating the clamping torque and switches 6, the transmitter 4 transmits the detected clamping torque value to a PC.

(7) The main body 1 is provided with a lever 7, the tip of the lever 7 is provided with a head 8 comprising a toggle mechanism.

(8) As shown in FIG. 3, the top surface 4a of the transmitter 4 on the torque wrench is opposed to a position camera 9, a bolt hole 10 to fix the transmitter 4 to the main body 1 is opened on the top surface 4a.

(9) The bolt holes 10 are formed to four places in total, positioned at the rectangular corners when viewed from the direction of the camera 9, and the bolt holes 10 are formed in the thickness direction of the transmitter 4.

(10) A marker 12 is attached to the top surface of the head 11a of a bolt 11 passed through bolt hole 10.

(11) As for the attachment means, this is optional and can be stuck on or adsorbed with a magnet.

(12) Also, in the condition where the transmitter 4 is fixed to the main body 1 using a bolt 11, the depth of the large diameter 10a (of the bolt through hole) is larger than that of the total thickness of the bolt head portion 11 a and the thickness of the marker 12.

(13) As a result, the marker 12 is positioned to be lower than the aperture surface of the bolt hole 10.

(14) The possibility of the marker being damaged or peeled off by hitting other members during work is therefore reduced.

(15) In the above, confirm the position of the four markers 12 with the camera 9, input the position of the torque wrench, that is the position of the point in time when the signal of the clamping completion has been sent from the transmitter 4 by predetermined torque to the computer, and store/record that clamping has been completed for every individual fastener.

(16) In the above examples, even if a total of four markers are attached, positioned at each rectangular corner, identification of the direction (right side or left side) of the torque wrench may not be possible.

(17) Therein as shown in FIG. 1, another marker 13 may be added which is different from the above.

(18) Regarding this marker 13, it is preferable to put the marker into an existing recess since it will be protected from possible damage

INDUSTRIAL APPLICABILITY

(19) The torque wrench of the present invention can be used in the assembling process of an engine and the vehicle body of an automobile.

Explanations of the Letters and Numerals

(20) 1 . . . main body of torque wrench, 2 . . . grip section, 3 . . . indicator, 4 . . . transmitter, 4a . . . the top surface of the transmitter, 5 . . . indication area, 6 . . . switches, 7 . . . lever, 8 . . . head, 9 . . . camera, 10 . . . bolt through hole, 10a . . . large diameter of the bolt thorough hole, 11 . . . bolt, 11a . . . bolt head portion, 12,13 . . . marker.