JPS61100378A - Clamping discriminator for propeller shaft - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application> The present invention provides a method for tightening a propeller shaft when connecting a transmission and a differential through the transmission, differential, or propeller shaft in a vehicle manufacturing line. The mark flashes on the discriminator.

<Prior Art> In a vehicle manufacturing line, one or more propeller shafts are connected in series between a transmission and a differential. In this case, the propeller shaft is connected, for example, to the parking brake drum on the Mitsushiran side, and the propeller shaft is connected by connecting the companion 7 flange and the propeller shaft flange, for example, connecting the front and rear. This is done by tightening bolts. When connecting, the number of propeller shafts varies depending on the vehicle model, so if there are many propeller shafts, there will be a total of 16 or 20 bolt tightening locations.

<Problems to be Solved by the Invention> When workers tighten the bolts as described above on a production line, they often forget to tighten the bolts when there are a large number of tightening points. There was an element in which the quality of the product depended on one's physical condition.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, the present invention relates to a propeller shirt identification device that prevents forgetting to tighten bolts on a propeller shaft.

Means for Solving Problems> The present invention achieves the above object by attaching a sensor to the wrench for tightening the propeller shaft that connects the transmission and the differential in a vehicle manufacturing line, and tightening by the sensor. The completion signal is counted by a counter, and if the counted value of the counter matches a preset value, a one is displayed, and if they do not match, another display is displayed.

EMBODIMENTS> The present invention will now be described in detail with reference to FIGS. 1 and 2. FIG. 1 shows a tightening operation on a vehicle manufacturing line. A propeller shaft 3 is connected to a parking brake drum 2 connected to a transmission 1 by a bolt 4. This bolt tightening work is performed by an operator using a torque wrench 5.

A sensor 6 such as a load cell or a sound sensing element is attached to the handle of the torque wrench 5, and is electrically connected to a measurement display section 7 by wire.

On the measurement display section 7, a switch 7a is temporarily closed upon receiving a tightening completion signal from the sensor 6.

Here, the tightening completion signal is generated by picking up the "click" sound that occurs when the torque wrench 6 is turned all the way, or the rise when a certain load is applied to the load cell.

When the switch 7a closes, the closing signal causes the counter 7b to increment the counted value by one. In this way, when the number of bolts based on the number of propeller shafts preset on the setting device 7c and displayed on the display 7J matches the counted value obtained by addition,
An output is generated from counter 7b which energizes indicator (eg lamp) 7e via amplifier 7d.

A timer 7f measures a certain period of time after setting by the setter 7C, and if a coincidence signal is not output from the counter 7b within the counting time by the timer 7f, the output of the timer 7f is sent to the display word (lamp, etc.) via the amplifier 7g. )7h is energized.

If the coincidence signal is output within the counting time by the timer 7f, a reset signal outside the timer is output from the amplifier 7d, and the timer 7f is stopped.

In this way, the indicator 7e is energized to indicate that all the bolts on the propeller shaft 3 have been tightened as scheduled, and the indicator 7h is energized if they have not been tightened. As a result, forgetting to tighten the bolts can be prevented.

It should be noted that as the indicators 7e and 7h, it is sufficient to notify the operator, so a means such as a buzzer may also be considered.

<Effects of the Invention> As explained above, according to the present invention, it is possible to prevent forgetting to tighten bolts, and it is possible to obtain a product of constant quality.

[Brief explanation of the drawing]

1 and 2 show embodiments of the present invention. FIG. 1 is an explanatory diagram showing tightening work on a vehicle manufacturing line, and FIG. 2 is a circuit diagram of an example of a measurement display section. In the figure, 3 is the propeller shaft, 4 is the bolt, 5 is the wrench, 6 is the sensor, 7 is the measurement display, 7b is the counter, 7c is the setting device, 7f is the timer, 7e, ? h, 7j are indicators. Patent applicant Mitsubishi Motors Corporation Agent

Claims (1)

[Claims] On a vehicle manufacturing line that tightens the propeller shaft that connects the transmission and the differential, a sensor is attached to the wrench for tightening, the tightening completion signal from this sensor is counted by a counter, and the count value of this counter is set in advance. A propeller shaft tightening determination device characterized by displaying one when the values match, and displaying another display when they do not match.