JPH0222183Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an automatic speedometer cable tightening device that is attached to an automobile engine.

<Prior Art> As shown in FIG. 2, a speedometer cable 2 for an automobile is attached to an engine 1 with a nut 3. The nut 3 has been tightened by a worker using a plier wrench 4.

<Problem to be solved by the invention> Manually tightening the nuts of the speedometer cable on a mass-produced automobile assembly line poses a problem in that it places a considerable labor burden on the workers.

<Means for Solving the Problems> The present invention solves the above-mentioned conventional problems, and its configuration is such that the tightening nut of the speedometer cable attached to the engine is automatically tightened using a plier wrench. An arc guide hole whose center point is the nut gripping part at the tip of the pliers wrench and whose radius is the length to the main shaft of the pliers wrench, and a radius whose radius is the length from the center point to the tip of the handle of the pliers wrench. The apparatus includes a copying plate having a copying surface having an arc concentric with the guide hole, and a bracket guided by a roller along the copying surface of the copying plate, and the main shaft of the pliers wrench is slid into the guide hole. An opening/closing cylinder that is movably guided and connected to one handle of a pliers wrench to the bracket is pivotally supported in an axial direction intersecting the one handle, and a pivoting cylinder that is connected to the other handle of the pliers wrench to the copying plate. The opening/closing cylinder is pivotally supported on an axis parallel to the opening/closing cylinder, and the other handle of the pliers wrench is coupled to the bracket.

<Function> The present invention opens and closes the pliers wrench using the opening/closing cylinder provided on the copying plate, and slides and guides the required shaft along the guide hole using the turning cylinder, so that both handles can be opened and closed. The speedometer cable tightening nut is automatically tightened by guiding the pliers along the tracing surface and pivoting the pliers wrench around the nut gripping part.

<Example> Hereinafter, an example of the present invention will be described based on FIG. 1. Reference numeral 22 denotes an engine truck on which the engine 1 is mounted and moves. 2 is a speed cable, and 3 is a nut.

Reference numeral 10 denotes a truck, which moves on rails 19 in parallel with the engine truck 22. This trolley 1
The device of the present invention is provided on the 0.

The device of the present invention is composed of a pliers wrench 4, a copying plate 5, a cylinder 8 for opening/closing the pliers wrench 4, a turning cylinder 9, and a bracket 31.

The copying plate 5 has a circular arc guide hole 6 whose center point is the nut gripping part 4b at the tip of the pliers wrench 4 and whose radius is the length up to the main axis 4a of the pliers wrench 4, and a circular guide hole 6 whose center point is the nut gripping part 4b at the tip of the pliers wrench 4.
The guide hole 6 has a tracing surface 5a concentric with the guide hole 6, whose radius is the length to the tips of the handles 7a and 7b.

The bracket 31 is guided and supported on the tracing surface 5a via a roller 30.

The pliers wrench 4 has its main shaft 4a slidably guided in the guide hole 6. An opening/closing cylinder 8 is connected to one of the handles 7a, which is pivoted to the bracket 31 by a pivot 32 and arranged in an axial direction intersecting the one handle 7a. Further, a turning cylinder 9 is connected to the other handle 7b, which is pivotally supported on the copying plate 5 by a pivot 32 and arranged along an axis parallel to the opening/closing cylinder 8.

Further, the other handle 7b is connected to the bracket 31 at a connecting portion 31a.

The copying plate 5 is fixed to a movable body 13 which is movable forward and backward by a forward and backward cylinder 14 via a guide rail 12 on a platform 11 provided on a truck 10 so as to be movable up and down and swingable. Reference numeral 15 denotes an elevating motor, which moves an elevating position detecting rod 16 that contacts the copying plate 5 up and down.

In order to move the truck 10 in synchronization with the engine truck 22, the truck 10 is provided with a synchronizing cylinder 17, and a receiving member 23 with which the end of the piston rod 18 engages and disengages is provided protruding from the engine truck 22 side. Further, a spring drum 20 for returning to the original position is installed on the trolley 10, and a wire 24 with one end fixed at the original position is wound around it. Reference numeral 21 denotes a shock absorber that comes into contact with the carriage 10 at the end returned to its original position.

Since the present invention has the structure as described above, the trolley 1
When the engine truck 22 is flowing in the original position of 0, this is detected by the limit switch 25 and the synchronous cylinder 17 is actuated to advance the piston rod 18 and engage the receiving member 23.
Thereby, the truck 10 is run and moved in synchronization with the engine truck 22. While the truck 10 is running, the movable body 13 is moved forward by the advancing/retracting cylinder 14, and the pliers wrench 4 on the copying plate 5 is positioned at the nut 3 of the speedometer cable 2 which is temporarily fastened. First, the pliers wrench 4 is closed using the opening/closing cylinder 8 to clamp the nut 3. At this time, the other handle 7b is the turning cylinder 9
Movement is regulated by.

Next, the turning cylinder 9 is activated. Due to the operation of this turning cylinder 9, the other handle 7b is connected to the connecting portion 31a provided on the bracket 31, so that the pliers wrench 4 moves its key shaft 4a guided along the guide hole 6. With,
The bracket 31 is moved along the tracing surface 5a,
It is pivoted around the nut gripping part 4b. As a result, the nut gripping portion 4b applies a tightening torque to the nut 3 being clamped.

If the tightening of the nut 3 is not completed with one rotation of the pliers wrench 4, operate the opening/closing cylinder 8 at the rotation end in the tightening direction, unclamp it once, and return it with the rotation cylinder 9. Then, the clamping and rotation operations shall be repeated several times. The completion of this tightening is detected by a limit switch provided on the turning cylinder 9.

After the tightening is completed, the piston rod 18 is moved backward by the synchronous cylinder 17 to release the engagement with the receiving member 23, and the bogie 10 is returned to its original position by winding the wire around the spring drum 20.

<Effects of the invention> As described above, according to the invention, since the opening/closing and turning movements of a general pliers wrench are automatically performed in the same manner as when manually operated by a human, the nut of the speedometer cable can be automatically tightened. It also has the advantage that torque management can be properly achieved by adjusting the air pressure of the swing cylinder.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the device of the present invention, and FIG. 2 is an explanatory diagram of conventional tightening. 2... Speedometer cable, 3... Nut, 4... Pliers wrench, 4a... Required shaft, 5
...Copying plate, 6...Guide hole, 7a, 7b
...Handle, 8...Opening/closing cylinder, 9...Swivel cylinder.

Claims (1)

[Scope of utility model registration request] The tightening nut of the speedometer cable attached to the engine is automatically tightened using a pliers wrench, and is an arc whose center point is the nut gripping part at the tip of the pliers wrench and whose radius is the length to the required axis of the pliers wrench. a copying plate having a guide hole having a radius of the length from the center point to the tip of the handle of the pliers wrench and a copying surface having an arc concentric with the guide hole; a guided bracket, the main shaft of the pliers wrench is slidably guided in the guide hole, and an opening/closing cylinder connected to one handle of the pliers wrench is connected to the bracket and intersects with the one handle. A rotating cylinder that is pivoted in the axial direction and connected to the other handle of the pliers wrench to the copying plate is pivoted on an axis parallel to the opening/closing cylinder, and the other handle of the pliers wrench is coupled to the bracket. This is an automatic speedometer cable tightening device.