JP6809117B2 - How to remove the derailleur - Google Patents

Description

The present invention relates to a method for removing a transmission, and in particular, removes the transmission from the jig by loosening the screw parts with respect to a jig in which the housing of the vehicle transmission is screwed and fixed. Regarding the method.

Generally, in order to attach a vehicle transmission to a jig, the housing of the transmission is screwed and fixed to the front side of the jig. Then, when the transmission is removed from the jig, the screw parts used for fixing the screws are loosened from the front side of the jig.

Japanese Unexamined Patent Publication No. 2000-145742

However, when loosening the screw component from the front side of the jig, the housing of the transmission may be an obstacle depending on the working position. Therefore, on the front side of the jig, it may not be possible to loosen all the screw parts used for screw fixing at one working position.

The present invention has been made in view of the above circumstances, and it is possible to prevent the housing of the transmission from being obstructed when loosening the screw parts, and to easily remove the transmission from the jig. The purpose is to provide a method.

The method for removing the transmission according to the present invention is to attach the screw parts used for screwing and fixing from the back side of the jig to the jig in which the housing of the vehicle transmission is screwed and fixed to the front side. A method of removing a transmission by loosening and removing the transmission from the jig. The jig is formed by penetrating a screw hole for screwing the screw component from the front portion to the back portion thereof. A tool engaging hole is formed at the tip of the screw component, and the method includes an insertion step of inserting a tool into the tool engaging hole from the back side of the jig and the tool being inserted into the screw component. It is characterized by having a rotation process of rotating in a loosening direction.

Further, a plurality of insertion holes are formed in the flange portion provided around the opening of the housing over the entire circumference of the flange portion, and the screw parts and the screw holes correspond to the respective insertion holes. A plurality of the screw parts are provided, and the screw parts are inserted into the insertion holes from the front side of the housing and screwed into the screw holes.

Further, the insertion step and the rotation step are performed by a robot arranged at a position on the back side of the jig.

Further, the jig to which the housing is screwed and fixed is placed on the first conveyor, and in the method, the jig is inserted before the insertion step, and the insertion step and the rotation step are performed. A moving step of moving the work position by the first transfer conveyor is further provided.

Further, after the rotation step, a support step of supporting the transmission removed from the jig on a second conveyor arranged so as to extend from the working position to the front side is further provided.

In addition, the support step includes a step of supporting the removed transmission by a support base mounted on the second transfer conveyor.

According to the method for removing the transmission according to the present invention, it is possible to prevent the housing of the transmission from being obstructed when loosening the screw parts, and to easily remove the transmission from the jig.

It is a schematic perspective view which shows the whole structure of the removal device which realizes the removal method of the transmission which concerns on this invention. It is a rear view of a jig. FIG. 3 is a sectional view taken along line III-III of FIG. It is an enlarged view of part A of FIG. It is an enlarged view of part B of FIG. It is the schematic perspective view which shows the whole structure of the removal device which realizes the removal method in the comparative example.

Hereinafter, a method of removing the transmission according to the embodiment of the present invention will be described with reference to the accompanying drawings. It should be noted that the front-back and left-right directions shown in the figure are merely defined for convenience of explanation.

FIG. 1 is a schematic perspective view showing an overall configuration of a removal device that realizes a method of removing the transmission 1 according to an embodiment of the present invention. In FIG. 1, the broken line portion P indicates a working position where the insertion step and the rotation step described later are performed. FIG. 2 is a rear view of the jig 2 in the present embodiment, and FIG. 3 is a sectional view taken along line III-III of FIG. 1 and is a vertical sectional view of the jig 2. Further, FIG. 4 is an enlarged view of the broken line portion A of FIG. 2, and FIG. 5 is an enlarged view of the broken line portion B of FIG.

First, with reference to FIG. 1, a configuration in which the housing 10 of the vehicle transmission 1 is bolted and fixed to the front side of the jig 2 will be described. The bolted fixing in the present embodiment corresponds to the screw fixing described in the claims, and the bolt 3 corresponds to the screw component described in the claims.

The housing 10 of the transmission 1 is arranged long in the front-rear direction, and accommodates the clutch mechanism (not shown) of the transmission 1 in the front portion and the gear mechanism (not shown) of the transmission 1 in the rear portion. Further, the housing 10 has a circular opening 11 at the front end portion, and a flange portion 12 is provided around the opening portion 11.

As shown in FIGS. 2 and 3, a plurality of (12 in this embodiment) insertion holes 13 are formed in the flange portion 12 over the entire circumference thereof. The flange portion 12 and the insertion hole 13 are originally used for bolting and fixing the housing 10 to the internal combustion engine of a vehicle (not shown), but in the present embodiment, the housing 10 is bolted and fixed to the jig 2. Used.

The jig 2 is formed with a screw hole 20 through which a bolt 3 is screwed from the front portion 2a to the back surface portion 2b. A plurality of screw holes 20 (12 in this embodiment) are provided corresponding to the insertion holes 13 of the flange portion 12.

Specifically, the jig 2 is used for assembling, inspecting, and the like of the transmission 1, and is arranged upright in the vertical direction. The jig 2 is formed in a plate shape and has a circular opening 21 at the center. Further, the jig 2 is fixed to the upper surface of the rear end portion of the plate-shaped holding member 22 placed horizontally, and is held in an upright state in the vertical direction. The jig 2 is arranged so that the front portion 2a faces rearward, and the flange portion 12 of the housing 10 is brought into contact with the front portion 2a.

The bolts 3 are hexagon headed bolts, and a plurality of bolts 3 (12 in this embodiment) are provided corresponding to the insertion holes 13 of the flange portion 12. The bolt 3 is inserted into the insertion hole 13 from the front side of the housing 10 and is screwed into the screw hole 20. That is, by tightening the bolt 3 from the rear to the front into the screw hole 20, the housing 10 is bolted and fixed to the front side of the jig 2, and the transmission 1 is attached to the jig 2. Further, as will be described in detail later, as shown in FIG. 1, the jig 2 to which the housing 10 is bolted and fixed is placed on the first conveyor 6.

Next, a method of removing the transmission 1 from the jig 2 (hereinafter, simply referred to as a “removal method”) will be described.

In the removal method according to the present embodiment, the bolt 3 used for bolting and fixing is loosened from the back side of the jig 2 with respect to the jig 2 in which the housing 10 is bolted and fixed to the front side, and the transmission 1 Is removed from the jig 2.

Here, as shown in FIGS. 4 and 5, a hexagonal hole 30 as a tool engaging hole is formed at the tip of the bolt 3. The hexagonal hole 30 is formed at the axial center position of the tip surface of the bolt 3 (that is, the end surface of the bolt 3 opposite to the head).

The removing method includes an insertion step of inserting the hexagon wrench 4 as a tool into the hexagonal hole 30 from the back surface side of the jig 2, and a rotation step of rotating the hexagon wrench 4 in the loosening direction of the bolt 3.

As shown in FIG. 1, the insertion step and the rotation step are performed by the robot 5 arranged at a position on the back side of the jig 2. The robot 5 is composed of a multi-joint (three-joint in this embodiment) type arm robot, and is arranged so that the arm 50 extends from the front to the rear. A hexagon wrench 4 fixed to the socket 51 is provided at the tip of the arm 50 of the robot 5. Further, although not shown, the robot 5 is electrically connected to a controller as an electronic control device, and is controlled by the controller to automatically perform the insertion process and the rotation process.

On the other hand, the removing method includes a moving step of moving the jig 2 to the working position P where the inserting step and the rotating step are performed by the first transfer conveyor 6 before the inserting step. Further, the removal method includes a support step of supporting the transmission 1 removed from the jig 2 on a second conveyor 7 arranged so as to extend from the working position P to the front side after the rotation step. .. Further, the support step includes a step of supporting the removed transmission 1 by the support base 8 mounted on the second transfer conveyor 7.

The first conveyor 6 is composed of a roller conveyor, and is arranged at a position behind the robot 5 so as to extend linearly from the left side to the right side. Further, in the first conveyor 6, the jig 2 is placed via the holding member 22. Further, the first conveyor 6 is electrically connected to the controller, and the controller controls the moving process to be performed automatically.

The second conveyor 7 is composed of a roller conveyor and is arranged in a direction orthogonal to the first conveyor 6. Further, the second transfer conveyor 7 mounts the transmission 1 removed from the jig 2 via the support base 8. Further, the second conveyor 7 is electrically connected to the controller, and the controller controls the support process to be performed automatically.

The types of the first conveyor 6 and the second conveyor 7 are arbitrary, and may be, for example, a belt conveyor or the like.

Next, the removal method will be described in more detail along with the work procedure. It is assumed that the housing 10 is already bolted and fixed to the jig 2 and placed on the first conveyor 6.

First, as a moving step, the controller controls the first conveyor 6 to move the jig 2 from the left side to the right side and stop it at the working position P. At this time, the housing 10 is arranged so as to project rearward from the working position P on the first conveyor 6.

Subsequently, the controller controls the second conveyor 7 to move the support base 8 from the rear to the front so that the support base 8 slips under the housing 10. That is, the support base 8 is brought into contact with the lower part of the housing 10 in advance before the transmission 1 is removed from the jig 2, and the transmission 1 removed from the jig 2 is immediately and at the same height. Be prepared to support.

Next, as an insertion step, the controller controls the robot 5 to arrange the hexagon wrench 4 at a position coaxial with the hexagonal hole 30 of the first bolt 3 set in advance, and moves the hexagon wrench 4 to the rear. Move. As a result, the hexagon wrench 4 is inserted into the hexagonal hole 30 and engaged with the hexagon wrench 4.

Subsequently, as a rotation step, the controller controls the robot 5 to rotate the hexagon wrench 4 in the loosening direction of the bolt 3 to move the bolt 3 backward with respect to the screw hole 20. This rotational operation is performed until the bolt 3 reaches a position where it can be pulled out rearward from the screw hole 20. As a result, the first bolt 3 is pulled out from the corresponding screw hole 20.

Then, the controller controls the robot 5 to move the hexagon wrench 4 forward, and pulls out the hexagon wrench 4 from the hexagonal hole 30 and also from the screw hole 20.

Further, the controller controls the robot 5 and repeats the above-mentioned insertion step and rotation step for all the bolts 3 in a preset order. As a result, the bolts 3 are pulled out one by one from the screwed screw holes 20, and finally the bolts 3 are pulled out from all the screw holes 20. As a result, the bolting is released, and the transmission 1 is removed from the jig 2.

Then, as a support step, the transmission 1 removed from the jig 2 is immediately supported by the support base 8 which has been brought into contact with the lower part of the housing 10 in advance while maintaining the same height. It is supported on the transport conveyor 7 of 2.

After that, the controller controls the second conveyor 7 to move the support base 8 from the front to the rear. As a result, the transmission 1 supported by the support base 8 is retracted and conveyed together with the support base 8. Further, the controller controls the first conveyor 6 to move the jig 2 from which the transmission 1 has been removed from the working position P toward the right side.

As described above, according to the present embodiment, with respect to the jig 2 in which the housing 10 is bolted and fixed to the front side, all the bolts 3 are loosened from the back side of the jig 2, and the transmission 1 is moved from the jig 2. It can be removed.

Further, since each of the above steps is automated by the robot 5 and the conveyors 6 and 7 controlled by the controller, it is possible not only to reduce the burden on the operator but also to improve the accuracy of the work.

Here, as a comparative example, it is assumed that the bolt 3 is loosened from the front side of the jig 2 instead of loosening the bolt 3 from the back side of the jig 2 as in the present embodiment.

FIG. 6 is a schematic perspective view for explaining a removal method in this comparative example. In this comparative example, the robot 5L'and the robot 5R'are arranged at positions on the front side of the jig 2 and on the left and right positions of the housing 10. Further, the bolt 3'used for fixing with bolts does not have a hexagonal hole 30 at the tip thereof. Since other parts are the same as those in the present embodiment, the same reference numerals are used for the same components, and detailed description thereof will be omitted.

The robots 5L'and 5R' consist of articulated (three-joint) arm robots, and a socket 9 that can be engaged with the head of the bolt 3'is provided at the tip of each arm.

Then, each socket 9 is engaged with the head of the bolt 3'from the front side of the jig 2 and rotated in the loosening direction of the bolt 3', so that the bolt 3'is rearward from the screw hole (not shown). The bolted fixing is released, and the transmission 1 is removed from the jig 2.

However, in this comparative example, for example, when the robot 5L'on the left side of the housing 10 tries to loosen the bolt 3'located on the flange portion 12 on the side close to the robot 5R' on the right side, the robot 5L'on the left side The arm is blocked by the housing 10. Similarly, when the robot 5R'on the right side tries to loosen the bolt 3'located on the flange portion 12 on the side closer to the robot 5L' on the left side, the arm of the robot 5R'on the right side is hindered by the housing 10. That is, since the robots 5L'and 5R'cannot loosen the bolts 3'located on the opposite side of the housing 10, each of the robots 5L'and 5R' can loosen all the bolts 3'. Can't. Therefore, at least two robots must be arranged at the left and right positions of the housing 10.

On the other hand, in the present embodiment, as shown in FIGS. 1 to 3, one robot 5 arranged at a position on the back side of the jig 2 makes a hexagon into the hexagonal hole 30 from the back side of the jig 2. Since the wrench 4 is inserted and the bolt 3 is loosened, the arm 50 of the robot 5 is not obstructed by the housing 10. Therefore, unlike the comparative example, it is not necessary to arrange the two robots at the left and right positions of the housing 10, and the transmission 1 can be used as a jig with only one robot 5 arranged at the position on the back side of the jig 2. Can be removed from 2.

Therefore, according to the present embodiment, the housing 10 is prevented from being obstructed when the bolt 3 is loosened, and the transmission 1 can be easily removed from the jig 2.

Further, according to the present embodiment, the number of robots can be reduced as compared with the comparative example, so that the manufacturing cost can be suppressed.

Further, in particular, in the removing method of the present embodiment, the screw hole 20 is formed through the jig 2 from the front portion 2a to the back surface portion 2b thereof, and the hexagonal hole 30 is formed at the tip of the bolt 3. There is. Therefore, since the hexagonal holes 30 of all the bolts 3 can be accessed from the back surface side of the jig 2 at the shortest distance, the insertion process and the rotation process can be performed easily and efficiently.

Further, in the support step, the support base 8 is in contact with the lower part of the housing 10 in advance before the bolting is released, and the transmission 1 is arranged at a position where it can be supported at a constant height. .. Therefore, as described above, the transmission 1 can be supported immediately and at the same height from the time when the bolt fixing is released. Therefore, when the bolt 3 is pulled out from the screw hole 20, the transmission can be supported. It is possible to prevent 1 from falling onto the upper surface of the support base 8.

In addition, by arranging the support base 8 so that the transmission 1 is kept at a constant height before and after the bolting is released, the support base 8 is still tightened while the bolts 3 are loosened one after another. The load applied to the bolt 3 can be suppressed by the weight of the housing 10 with respect to the bolt. Therefore, the bolt 3 can be easily loosened until the last bolt 3 is pulled out from the screw hole 20.

The present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present invention.

For example, although not shown, the hexagon wrench 4 as a tool may be a rotary tool of another shape, for example, a square wrench. Further, the hexagonal hole 30 as the tool engaging hole may be an engaging hole of another shape, for example, a square hole.

Further, although not shown, the above-described embodiment can be modified as follows. In the following description, detailed description of the same components as those in the above-mentioned basic embodiment will be omitted.

(First modification)
At least one of each of the above steps may be performed manually. For example, at least one of the insertion step and the rotation step may be performed manually by an operator without using a robot.

In this case, the operator grasps the hexagon wrench, inserts the hexagon wrench into the hexagonal hole from the back side of the jig, and rotates the hexagon wrench to loosen the bolt.

Here, as a comparative example, it is assumed that the operator loosens the bolt from the front side of the jig. In this case, if these steps are performed at only one of the left and right working positions of the housing, the housing becomes an obstacle and it becomes difficult to loosen all the bolts. Therefore, for example, the operator needs to loosen the bolt located on the left side of the housing, then wrap around to the right side of the housing and loosen the bolt located on the right side.

On the other hand, in this first modification, the bolt can be easily loosened only at the position on the back surface side of the jig without such movement of the operator.

On the other hand, at least one of the moving process and the supporting process may be manually performed by an operator without being automatically controlled by the controller.

(Second modification)
In the above embodiment, the back surface portion 2b of the jig 2 to which the housing 10 is bolted and fixed is arranged on the first conveyor 6 so as to face completely forward. However, the jig 2 may be arranged so that, for example, the back surface portion 2b of the jig 2 faces diagonally forward to the left.

Further, the second conveyor 7 and the support base 8 may also be arranged so as to be slightly inclined around the vertical axis in accordance with the directions of the jig 2 and the transmission 1.

1 Transmission 2 Jig 2a Front 2b Back 3 Bolts (screw parts)
4 Hex wrench (tool)
5 Robot 10 Housing 11 Opening 12 Flange 13 Insertion hole 20 Screw hole 21 Opening 22 Holding member 30 Hexagonal hole (tool engagement hole)
50 arm 51 socket

Claims (4)

With respect to the jig in which the housing of the vehicle transmission is screwed and fixed to the front side, the screw parts used for screwing and fixing are loosened from the back side of the jig, and the transmission is fastened from the jig. How to remove the transmission
The jig is formed with a screw hole through which the screw component is screwed from the front portion to the back portion thereof.
A tool engaging hole is formed at the tip of the screw component.
The jig to which the housing is screwed and fixed is placed on the first conveyor and placed on the first conveyor.
The method is
An insertion step of inserting a tool into the tool engagement hole from the back side of the jig, and
A rotation process of rotating the tool in the loosening direction of the threaded rod, and
A moving step of moving the jig to a working position where the inserting step and the rotating step are performed before the inserting step by the first conveyor.
After the rotation step, the transmission is provided with a support step of supporting the transmission removed from the jig on a second conveyor arranged so as to extend from the working position to the front side. How to remove the transmission. A plurality of insertion holes are formed in the flange portion provided around the opening of the housing over the entire circumference of the flange portion.
A plurality of the screw parts and the screw holes are provided corresponding to the respective insertion holes.
The method for removing a transmission according to claim 1, wherein the screw component is inserted into the insertion hole from the front side of the housing and is screwed into the screw hole. The method for removing a transmission according to claim 1 or 2, wherein the insertion step and the rotation step are performed by a robot arranged at a position on the back side of the jig. The support step according to any one of claims 1 to 3, wherein the support step includes a step of supporting the transmission removed by a support base mounted on the second transfer conveyor. How to remove the transmission.

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