JPH0556329U - Bolt loosening device for car door removal - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is an automobile assembly line capable of automatically performing all the work of loosening two hinge bolts tightened at the upper and lower positions of a door. A bolt loosening device for removing a door is provided. [Structure] A support base 12 is provided on a fixed base 11 so as to be movable back and forth in the X-axis direction, and a movable body 14 is supported on the support base 12 so as to be horizontally movable in the Y-axis direction and vertically movable in the Z-axis direction. The moving body 14 is provided with a base plate 21 which is indexed into two positions by a shift cylinder 39, and a pair of upper and lower ratchet wrench 22 is provided on the base plate 21.
And a visual sensor 27 for detecting a door inner hole 26 formed in the door 5 in order to move the support 12 and the moving body 14 to properly position and control the ratchet wrench 22 at the hinge bolt position of the door, The movable body 14 is provided with a distance sensor 25 for detecting the position of the side surface of the door hinge.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a vehicle door removal bolt loosening device for an automobile assembly line.

[0002]

[Prior Art]

 In the assembly line of automobiles, when the assembly process is completed and the assembly line is entered, the door is temporarily removed for fitting inside the body, and the door is reattached at the point where the interior fitting is finished.

As shown in FIG. 6, a conventional door removing work is performed by mounting a door support base 4 with casters on a carriage 3 moving on a floor 2 beside a conveyor 1 on which a body 6 is transported. An operator rides on the dolly 3, loosens the hinge bolts with a hand tool, removes the door 5 from the body 6, supports it on the door support 4, and moves the dolly 3 to the hanger conveyor (not shown). The door 5 is moved from the support base 4 to the hanger conveyor, and is transported to the assembly station where it is attached to the body 6 again by the hanger conveyor.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional method, the hinge bolt is an inefficient work for loosening manually, and the worker has to work on the moving carriage 3 and has a problem in safety.

An object of the present invention is to provide a vehicle door removing bolt loosening device that solves the above-mentioned conventional problems.

[0006]

[Means for Solving the Problems]

 To achieve the above object, the gist of the present invention is to provide a support base provided on a fixed base so as to be movable back and forth in the X-axis direction, and to this support base left and right movement in the Y-axis direction and the Z-axis direction. A movable body that supports the vertical movement of the base plate, a base plate that is indexed to the movable body by the shift cylinder into two upper and lower positions, a pair of upper and lower ratchet wrench attached to the base plate, and the support base and the movable body are moved. In order to properly control the position of the ratchet wrench at the hinge bolt position of the door, a visual sensor for detecting a door inner hole opened in the door and a distance sensor for detecting the position of the side surface of the door hinge are provided on the moving body. It is a thing.

[0007]

[Action]

 With the above configuration, the support base is moved in the Y-axis direction so that the pair of upper and lower ratchet wrench are positioned on the door hinge side surface portion, and at this position, the moving body is moved in the Y- and Z-axis directions by the detection signals of the distance sensor and the visual sensor. Move to and control the ratchet wrench socket to accommodate the two hinge bolts. After that, fit the socket into the hinge bolt and loosen it, shift the base plate up or down, fit the socket of the ratchet lench to the upper or lower hinge bolt, and do all the loosening work automatically. Is possible.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 11 denotes a base fixedly installed on the floor 10. A support base 12 is mounted on the base 11 so as to move back and forth in the X-axis direction. Reference numeral 34 is a guide rail laid in the X-axis direction on the base 11, and 35 is a roller provided on the support 12 and traveling on the guide rail 34. A rack 36 is attached to the side surface of the base 11 in the X-axis direction, and a support stand moving servomotor 13 and a speed reducer 38 are attached to the sides of the support stand 12. A pinion 37 fixed to the output shaft is adapted to move the support base 12 forward and backward in the X-axis direction by a traveling drive mechanism meshing with the rack 36.

A movable body 14 is supported on the support base 12 so as to be horizontally movable in the Y-axis direction and vertically movable in the Z-axis direction. Reference numeral 15 is a first guide member that moves the moving body 14 in the Y-axis direction, and is equipped with a first feed screw 16 and a first servomotor 17 that rotates the feed screw 16 forward and backward. Reference numeral 18 is a second guide member for moving the moving body 14 in the Z-axis direction, and is provided with a second feed screw 19 and a second servo motor 20 for rotating the feed screw 19 in the forward and reverse directions.

A base plate 21 is attached to the movable body 14 so as to be vertically shiftable in two positions by a shift cylinder 39 in the Z-axis direction, and a pair of upper and lower ratchet wrench 22 having a socket is provided on the base plate 21. There is.

Further, a position detecting device 23 is arranged on the moving body 14 near the base plate 21. As shown in FIGS. 3 and 4, the position detecting device 23 is a distance sensor arranged so as to face a contactor 24 that comes into contact with a side surface of a door hinge and a sensor measurement surface 24a provided at a rear end of the contactor 24. 25 (laser sensor) in the width direction W of the vehicle, that is, the Y-axis direction detecting means, and the position of the door inner hole 26 opened in the door 5 are detected to detect the vertical position H in the Z-axis direction and the X-axis direction. It is composed of a visual sensor 27 (CCD camera) for detecting the deviation of the left and right position L, and the detection signals of the distance sensor 25 and the visual sensor 27 are inputted to a controller (not shown) to move the support base moving motor 13, the first motor. The servo motor 17 and the second servo motor 20 are controlled.

As shown in FIG. 5, the structure of the Y-axis direction detecting means comprising the contactor 24 and the distance sensor 25 (laser sensor) is held by the contactor 24 so that the guide member 29 can be moved back and forth. The slider 30 is urged by a spring 31 in the forward direction so as to be supported, and the slider 30 is connected to a contactor advancing / retracting cylinder 33 via a rod 32.

Next, the operation of the present invention having the above configuration will be described. First, the support base 11 is moved in the Y-axis direction to position the pair of upper and lower ratchet wrench 22 at the door hinge side surface portion. At this time, the base plate 21 is positioned by the shift cylinder 39 so that the socket of the ratchet wrench 22 corresponds to the upper bolt 28, for example. Here, the visual sensor 27 detects the position of the door inner hole 26 to measure the deviation between the vertical position H in the Z-axis direction and the horizontal position L in the X-axis direction, and then the contactor 24 is moved to the contactor forward / backward moving cylinder. 33 is operated to the forward end and brought into contact with the hinge side surface, and the backward movement amount of the contactor 24 is measured by the sensor measurement surface 24a and the distance sensor 25 in the width direction W of the vehicle, that is, in the Y-axis direction. To do.

The vertical position H, the horizontal position L, and the deviation amount in the width direction W of the vehicle are input to a controller (not shown), and are compared with the hinge bolt position data stored in the controller in advance to support the deviation amount. The table moving motor 13 and the first and second servomotors 17 and 20 are operated to correct the support table 14 in the X, Y, and Z axis directions. Then, the socket of the ratchet wrench 21 is fitted into the upper hinge bolt to loosen it, and then the base plate 21 is shifted downward by the shift cylinder 39 to index the socket of the ratchet wrench 21 to the lower hinge bolt position. The socket is fitted to the lower hinge bolt to loosen it.

When the socket is fitted into the hinge bolt, even if there is a slight phase shift between the socket and the hinge bolt or a pitch shift between the bolts, the ratchet wrench 22 is attached to the base plate 21 in the Y-axis direction. In addition, since it is mounted so that it can float in the Z-axis direction and is balanced, it is automatically absorbed by the floating action and the socket fits into the hinge bolt.

The seating fitted to the socket hinge bolt is confirmed by the hinge bolt seating confirmation proximity switch, and the socket is switched to high speed rotation to loosen the hinge bolt. By loosening the hinge bolt, the ratchet 22 is rotated backward around the Z-axis by the thread lead of the hinge bolt, and is confirmed by the hinge bolt looseness confirmation proximity switch.

[0017]

As described above, according to the present invention, a support base is provided on a base fixed to the floor so as to be movable back and forth in the X-axis direction, and the support base is horizontally moved in the Y-axis direction and Z-axis. In the vertical direction, a movable body supported vertically, a base plate which is indexed to the movable body by a shift cylinder into two upper and lower positions, a pair of upper and lower ratchet wrench attached to the base plate, the support base and the movable body. And a distance sensor for detecting the position of the door hinge side surface, and a visual sensor for detecting the door inner hole formed in the door to properly position and control the ratchet wrench at the hinge bolt position of the door. With the configuration provided in the above, the body of the automobile to which the door to be transported is attached is positioned by the body positioning device at the door removal position. The upper and lower ratchet wrench on the upper and lower sides of the closed body are automatically corrected from the both sides of the door body to accurately position the ratchet wrench, and the door hinge bolt can be loosened automatically. This makes it possible to improve the efficiency of door removal work in an automobile assembly line at once.

[Brief description of drawings]

FIG. 1 is a side view of the present invention.

FIG. 2 is a view on arrow A of FIG.

FIG. 3 is a schematic explanatory view of a position detection device.

FIG. 4 is a plan view of an arrow A portion of FIG.

FIG. 5 is a side view of Y-axis direction detection means.

FIG. 6 is an explanatory diagram of conventional door removal work.

[Explanation of symbols]

 5 door 11 base 12 support base 13 support base moving servo motor 14 moving body 17 first servo motor 20 second servo motor 21 base plate 22 ratchet wrench 24 contactor 25 distance sensor ring 26 door inner hole 27 visual sensor

Claims (1)

[Scope of utility model registration request] 1. A support base provided on a fixed base so as to be movable back and forth in the X-axis direction, and a movable body supported by the support base so as to be horizontally movable in the Y-axis direction and vertically movable in the Z-axis direction. A base plate indexed to the movable body by a shift cylinder into two upper and lower positions; a pair of upper and lower ratchet wrench attached to the base plate; A visual sensor that detects the door inner hole opened in the door to control the positioning properly in the position,
A vehicle door removal bolt loosening device, wherein a distance sensor for detecting a position of a side surface of a door hinge is provided on the moving body.