JPS6229013B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic exhaust gas sampling extraction device for automobiles, and its purpose is to be compatible with a wide variety of vehicles with different exhaust pipe terminal positions, and to save labor and shorten working time. It is.

Exhaust gas sampling is carried out to measure the concentration of exhaust gas at automobile manufacturing plants and repair shops. A conventional general extraction method involves an operator inserting a probe tube into an exhaust pipe. Therefore, the labor burden on the worker is heavy and a lot of working time is required. To solve this problem, there is a system that automates the insertion of the probe tube into the exhaust pipe, but this is only for one model of car.

On automobile production lines or maintenance shops, it is necessary to measure the exhaust gas concentration of various types of vehicles, and since the installation position of the exhaust pipe differs depending on the vehicle model, vertically and horizontally, it is only for the one type of vehicle mentioned above. This cannot be done with a machine, and if you try to force it to do so, it would require operators to adjust the vertical, horizontal, and horizontal positions of the protrusion tube to correspond to the exhaust pipes installed in each vehicle model, which would reduce the significance of automation in half.

The present invention relates to an automatic extraction device that solves such conventional problems, and its features are that it automatically detects the installation position of the exhaust pipe and simultaneously aligns the probe tube with the exhaust pipe terminal position. That's what I did.

Embodiments of the present invention will be described below with reference to the drawings. 1
is a table that is driven vertically, horizontally, and forwards and backwards, and a probe tube (not shown) for gas extraction inserted into the exhaust pipe W is provided approximately on the center line of the table.

On this table 1, a height position detection means and a left and right position detection means of the exhaust pipe W are provided. The structure of the height position detection means is as follows. Brackets 2a and 2b are fixedly installed at both left and right ends of a table 1, and a pair of left and right detection levers 3a and 3b are rotatably supported on these brackets 2a and 2b by a shaft 4. As shown in FIG. 2, the tips of the detection levers 3a and 3b are bently connected by a long groove 14 and a pin 15 that slides on the long groove 14, and this connecting point is connected to the probe tube (not shown). It is approximately on the center position line of the table 1 corresponding to the mounting position.
The pair of detection levers 3a and 3b are pulled by a spring 5, and normally maintained in a horizontal state by a stopper 6. In addition, the detection lever 3
A and 3b are provided with docks 17, and a limit switch for confirming the height position of the exhaust pipe W is operated by bending and swinging of the detection levers 3a and 3b.

On the other hand, the structure of the left and right position detection means is as follows. A feed screw shaft 7 is rotatably supported on the brackets 2a and 2b. The feed screw shaft 7 has left and right feed screws having different leads, and movable bodies 9a and 9b are screwed and supported on these feed screws. One end of the feed screw shaft 7 is connected to a deceleration motor 8 for rotational driving. the mobile body 9a,
9b has a contact member 10 that comes into contact with the side surface of the exhaust pipe W.
a and 10b are pivotally connected by a pin 11.
Docks 12a and 12b are mounted on the pin 11 and move in unison with the swinging of the contact members 10a and 10b, so as to operate a limit switch for confirming the left and right position of the exhaust pipe W. 13 is a spring for holding the docks 12a, 12b and contact members 10a, 10b in their original positions; 16 is a moving body 9a, 9;
This is the dot that operates the limit switch for confirming return to the original position, which is the end of left/right movement of b.

Next, referring to FIG. 2, a description will be given of the vertical, horizontal, horizontal, and forward/backward movement mechanisms of the table 1, which has the height position detection means and the left and right position detection means of the exhaust pipe W as described above.

An elevating table 20 guided by a guide rod 21 is placed on a base 18 so as to be movable forward and backward by guide rollers 19. The reciprocating movement of the elevating table 20 is performed by a chain drive mechanism (not shown). Further, the elevating and lowering drive is performed by an elevating cylinder 22 coupled to the lower surface of the elevating table 20.

A first support table 21 is connected and supported on the lifting table 20. A left-right operating shaft 23 is slidably supported on the first support base 21, and one end thereof is coupled to a left-right operating cylinder 24. A second support base 25 is mounted on the operating shaft 23 with a block 26.
are supported and connected via. On this second support stand 25 is a support shaft 2 having an axis parallel to the operating shaft 23.
7 is installed. The table 1 is slidably supported on this support shaft 27 via a block 28, and springs 29a and 29b interposed on the left and right sides of the block 28 constantly push the table 1 to the center position. It has a similar structure.

The operation of the present invention having the above structure will be explained.

The device of the present invention is installed in a pit dug into the floor, and when a vehicle is brought into the pit at a certain position on the floor directly above the pit, exhaust gas sampling is automatically extracted from the exhaust pipe.

After the vehicle is brought into position directly above the device and set, press the start button to start operation. First, the table 1 is raised by the lifting cylinder 22, and the detection levers 3a, 3b come into contact with the lower surface of the exhaust pipe W.
Even if the mounting position of the exhaust pipe W differs depending on the vehicle model, the contact position of the detection levers 3a and 3b will contact either one of the detection levers 3a or 3b, and the relative movement based on the upward movement of the table 1 Long groove 14 and pin 15
and the detection levers 3a, 3b.
rotates to operate a limit switch that detects and confirms the height position of the exhaust pipe W by the dot 17, thereby stopping the upward movement of the lifting cylinder 22. At the same time, the deceleration motor 8 of the feed screw shaft 7 is activated, and the pair of contact members 10a and 10b are fed and moved in a direction in which they approach each other from both ends. This contact member 10
By the feeding movements of a and 10b, the table 1 is corrected to the left or right so that the center position of the table 1 is placed on the same line as the exhaust pipe W position.

That is, the pair of contact members 10a, 10b move closer to each other from their original positions at both ends on the table 1 by the rotation of the feed screw shaft 7, and the detection levers 3a,
3b comes into contact with the side surface of the exhaust pipe W that is in contact with it.
When the center position of the table 1 is on the same line and in phase with the exhaust pipe W position, the pair of contact members 1
0a and 10b contact and clamp both sides of the exhaust pipe W at almost the same time, but when measuring a wide variety of car models indiscriminately, the center position of the table 1 is not necessarily the same as the exhaust pipe W depending on the left and right mounting positions of the exhaust pipe W. They are not necessarily in the same phase, but are biased to the left or right. At this time, one of the pair of left and right contact members 10a, 10b comes into contact with the exhaust pipe W first, and when the limit switch is activated by the dot 17, the left and right operation cylinder 24 moves the table 1 together with the second support base 25. is moved laterally to the same phase position as the exhaust pipe W, and the exhaust pipe W is held between the contact members 10a and 10b.

The height position of the exhaust pipe W is determined using the detection levers 3a and 3b, and the phase position of the center position of the table 1 and the exhaust pipe W are matched using the contact members 10a and 10b. The probe tube (not shown) can be inserted into the terminal opening of the exhaust pipe W. Based on the confirmation signal of the completion of position detection, an unillustrated advance/retreat device is activated, and the table 1 moves forward on the base 18 to insert the probe tube into the exhaust pipe W, and sucks the exhaust gas into the analyzer. At the same time, after a predetermined time has elapsed, the probe tube is moved backward and extracted from the exhaust pipe W, and the contact members 10a and 10b are returned to their original positions, and the table 1 is returned to its original position, completing the automatic extraction cycle. It is.

Note that even if engine vibrations propagate to the table 1 while the probe tube is inserted into the exhaust pipe W, the table 1 is supported elastically by the springs 29a and 29b on the second support base 25. Therefore, vibrations are absorbed by the springs 29a and 29b, and the table 1 is always pushed to the center position, thereby avoiding vibration interference between the probe tube and the exhaust pipe W, and This prevents damage to the W or probe tube.

As described above, the device of the present invention automatically detects the height and lateral position of the end of an exhaust pipe installed in a vehicle, and inserts a probe tube for exhaust gas extraction into the exhaust pipe into the exhaust pipe end. Since it performs guided positioning, even if a wide variety of vehicles with different exhaust pipe installation positions are randomly brought in, sampling can be reliably automatically extracted for all of them, reducing work time. This has the advantage of preventing damage due to mutual interference between the exhaust pipe and the probe tube due to engine vibration, and is of practical use in automobile manufacturing plants, maintenance shops, etc. that handle a large number of vehicles.

[Brief explanation of the drawing]

1 and 2 are main structural diagrams of the apparatus of the present invention. 1...Table, 3a, 3b...Detection lever,
7...Feed screw shaft, 8...Deceleration motor, 9a, 9
b...Moving body, 10a, 10b...Contact member, 1
2a, 12b...Dock, 14...Long groove, 15...
...Pin, 17...Dock, 18...Base, 20...
...Lifting table, 21...First support stand, 22...Cylinder for lifting and lowering, 23...Operating shaft, 24...Cylinder for left and right operation, 25...Second support stand, 27...Support shaft, 29a , 29b...Spring.

Claims (1)

[Scope of Claims] 1. A pair of bendable detection levers for detecting the height position of the exhaust pipe are mounted on a table that moves vertically, horizontally, and forwards and backwards, and a pair of bendable detection levers are mounted on a table that moves vertically, horizontally, and forwards and backwards, and the levers are fed and moved in the left-right relative direction to each other by a feed screw shaft. It is equipped with a pair of contact members for detecting the left and right positions of the exhaust pipe, and a probe tube for gas extraction that advances into the exhaust pipe, and the probe tube is automatically controlled to the exhaust pipe position by the detection lever and the contact member. An automatic exhaust gas sampling extraction device characterized by: 2. The automatic exhaust gas sampling extraction device according to claim 1, wherein the table is supported so as to be floating in the left and right direction, and is always pushed to the center position by a spring.