JP3653162B2 - Door mounting device in body assembly line - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door mounting device in a vehicle body assembly line, and more particularly, to a door mounting device in a vehicle body assembly line in which a door body serving as a mounting part is moved in synchronization with a vehicle body main body conveyed by a slat conveyor.
[0002]
[Prior art]
Conventionally, when assembling parts to the body body mounted on the slat conveyor in the body assembly line, the operator takes out the parts mounting table provided near the slat conveyor and attaches it to the body body. Doing work.
[0003]
On the other hand, in order to increase the efficiency of the mounting work, a synchronization device for mounting the mounting component in synchronization with the movement of the vehicle body conveyed by the slat conveyor in the vehicle body assembly line has been proposed. There is a Japanese Utility Model Publication No. 3-29073.
[0004]
The synchronizer 50 in the assembly line disclosed in this prior art is provided so as to be movable back and forth along a slat conveyor 51 and a rail 52 arranged in parallel above the slat conveyor 51 as shown in FIG. A sliding member 53 to be mounted on the slat conveyor 51, and a pressure bonding member 54 made of rubber or the like that moves synchronously with the slat conveyor 51 by pressure bonding to the upper surface of the slat conveyor 51, and the slide member 53 and the pressure bonding member 54 And a return member 57 such as a hose reel for returning the connection member 56 to the standby position by releasing the pressure bonding.
[0005]
When the vehicle body B placed on the slat conveyor 51 passes through the synchronizing device 50 configured as described above, the worker 0 gets on the crimping member 54 as shown in FIG. Then, the crimping member 54 is elastically deformed and crimped onto the upper surface of the slat conveyor 51, and the operator 0 moves with the slat conveyor 51 in synchronization with the slat conveyor 51 against the restoring force of the restoring means 57.
[0006]
The worker 0 takes out the attachment part or tool from the mounting table 55 provided on the connecting member 56 of the synchronization device 50 during the movement, and attaches the attachment part to the vehicle body B. When the operator 0 gets off the pressure bonding member 54, the pressure bonding between the pressure bonding member 54 and the slat conveyor 51 is released, and the synchronization device 50 returns to the standby position by the return force of the return means 57.
[0007]
On the other hand, the manufacturing method of the automobile body completes the vehicle body by assembling the parts obtained by press-forming the steel plate in the pressing process to each other by welding or the like in the next welding process. In the subsequent painting process, this body is pre-treated, undercoating by electrodeposition coating, sealing, intermediate coating, and top coating, and the parts are assembled to the body after painting.
[0008]
However, in the above-described outfitting process, since the door body is attached to the vehicle body in advance, when the large parts such as the seat, the instrument panel, etc. are carried into the vehicle interior, the contact between the large parts and the door body is caused. Must be carried in while avoiding the above, the workability is poor, and the automation of the assembly work by the robot may be limited.
[0009]
As a countermeasure, as disclosed in Japanese Patent Laid-Open No. 53-8884, in a mounting process in an automobile assembly line, the door body is temporarily removed from the body body that is being transferred, and the body body that has been detached is then assembled into the main assembly. Along with carrying various parts such as seats, instrument panels, etc., transported by the line, the door body removed in parallel is transferred to another door equipment line to install door equipment such as door glass, door lock device, window regulator, etc. In addition, a method for reassembling the door body mounted in the door mounting process to the vehicle body body has been proposed.
[0010]
A method of reassembling the door main body to the vehicle body main body in the door mounting step will be described with reference to an explanatory diagram shown in FIG.
[0011]
As shown in FIG. 9, the movement of the vehicle body B on the slat conveyor 61 is stopped at the door assembly position, while the vehicle body B stops the carriage 63 on which the door body D is placed by the toe conveyor 62. Then, the fixture 64 of the carriage 63 is brought into contact with the side sill of the vehicle body B to perform relative positioning of the vehicle body B and the carriage 63. Then, after adjusting the height of the top 65 supporting the door main body D so that the height of the door main body D on the carriage 63 coincides with the body main body B side, the door 63 is supported by the carriage 63. Thus, the door body D is attached to the vehicle body B.
[0012]
[Problems to be solved by the invention]
According to the prior art disclosed in the above Japanese Utility Model Publication No. 3-29073, when the operator gets on the crimping member, the crimping member is crimped to the slat conveyor, and the operator is synchronized with the slat conveyor together with the slat conveyor. During the movement, the worker can take out the mounting part or tool from the mounting table provided on the connecting member, and assemble the mounting part on the vehicle body, so that the worker remains on the slat conveyor. Assembling work can be performed and work efficiency is improved.
[0013]
However, since mounting parts are prepared on the mounting table in advance, the mounting parts are comparatively small and limited to mounting parts common to the vehicle body, and large parts such as a door body corresponding to each vehicle body are individually mounted on the mounting table. It is impossible to prepare and cannot be applied to the assembly work of the door body.
[0014]
On the other hand, according to the latter, the prior art disclosed in Japanese Patent Laid-Open No. 53-8884, the door body is removed from the vehicle body, and the vehicle body is transported by the main assembly line to mount various parts such as seats and instrument panels. At the same time, the removed door body is equipped with door glass, door lock device, window regulator, etc. by the door fitting line, and the door body mounted on the door fitting line is reassembled to the vehicle body to improve work efficiency. Can be planned.
[0015]
However, the movement of the vehicle body on the slat conveyor is stopped at the door installation position, the carriage on which the door body is placed is transported to the door installation position by the toe conveyor, and the carriage is provided on the vehicle body stopped at the door installation position. Work is complicated because the fixed fixture is brought into contact with the side sill to relatively position the vehicle body and the carriage, and the height of the frame is adjusted to match the height of the door body on the carriage to the vehicle body side. become.
[0016]
This is especially true for models with different vehicle body heights due to differences in tire size, shock absorbers, etc., and the height from the floor where the slat conveyor is installed to the door mounting position of the vehicle body is different for each vehicle type. This is prominent in the so-called mixed flow production in which the vehicle types are assembled on the same assembly line.
[0017]
In addition, since the vehicle body on the slat conveyor is temporarily stopped at the door mounting position, there is a problem that the work efficiency is hindered and the manufacturing cost is increased.
[0018]
Therefore, the present invention has been made in view of such points, and the object thereof is to synchronize with the conveyance of the vehicle body without stopping the vehicle body conveyed at the door mounting position and even in mixed flow production. Accordingly, it is an object of the present invention to provide a door mounting device in a vehicle body assembly line that can be easily attached to a door body, improve work efficiency, and can be simplified in configuration.
[0019]
[Means for Solving the Problems]
A door mounting device in a vehicle body assembly line of the present invention that achieves the above object is a door mounting device in a vehicle body assembly line that moves synchronously with a vehicle body body that is placed on a slat conveyor and transported to mount the door body to the vehicle body body. , A carriage that can move on the floor on which the slat conveyor is installed, a conveyor presser that is provided integrally with the carriage and that can be selectively pressed against and separated from the upper surface of the slat conveyor, and can be raised and lowered to the carriage. A movable holding portion that is supported and supports the door body, a movable holding portion elevating means that is installed between the carriage and the movable holding portion to raise and lower the movable holding portion, and is provided integrally with the movable holding portion. When the movable holding portion is raised, the side sill is pressed against the lower surface of the side sill of the vehicle body. The bogie and the vehicle body and sill pressing, the base end consists of contact with the guide rollers attached to the tire receiving and the carriage in contact with the tire provided in the attached to the car body to the bogie to the vehicle body side portion And a relative positioning means for determining a relative position with respect to each other.
[0020]
Accordingly, the tire holder of the relative positioning means provided on the carriage is brought into contact with the tire of the vehicle body which is placed on the slat conveyor and conveyed, and the guide roller is brought into contact with the side of the vehicle body so that the vehicle body and the carriage The relative position is determined, the conveyor presser is pressed against the upper surface of the slat conveyor, and the movable holding part is lifted by the movable holding part raising / lowering means, and the side sill presser is pressed against the lower side of the side sill. The door hinge bracket mounted on the door body rises in the vicinity of the door hinge mounting portion of the vehicle body body as it moves synchronously with the conveyor and the vehicle body body, and the door body mounted and supported on the movable holding section rises as the movable holding section rises. The door body can be easily attached to the vehicle body.
[0022]
Further, the relative positioning means is composed of a tire receiver attached to the carriage and contacting the tire, and a guide roller contacting the side of the vehicle body, thereby simplifying the structure and generating damage to the vehicle body. The risk of doing so is avoided.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a door mounting device in a vehicle body assembly line according to the present invention will be described with reference to the drawings.
[0024]
FIG. 1 is an explanatory diagram showing an outline of a main part of an automobile assembly line. In a painting process I, for example, a vehicle body B that has been overcoated while a door body, a front hood, a rear hood, etc. are temporarily assembled is an overhead conveyor or the like. Is transferred to the outfitting process II.
[0025]
In the vehicle body B transferred to the fitting process II, first, the door hinge D is removed at the door removal position IIa, whereby the door body D including the door outer panel and the door inner panel is removed. The removed door body D moves to the door fitting line DL, and the door fitting line DL is assembled with fitting parts such as a door glass, a window regulator, and a door lock device.
[0026]
On the other hand, the vehicle body B from which the door body D has been removed is transferred by a main assembly line ML including transfer means such as an overhead conveyor and a slat conveyor, and is equipped with a seat, an instrument panel, and the like to the door mounting position IIb. Be transported.
[0027]
In synchronization with the vehicle body B that is carried into the door mounting position IIb by the main assembly line ML, the door body D that is carried into the door mounting position IIb by the door fitting line DL is assembled again to the vehicle body B by the door mounting device 1. .
[0028]
Next, the door attachment device 1 for attaching the door body D to the vehicle body B at the door attachment position IIb will be described with reference to FIGS.
[0029]
2 is a plan view for explaining an overall outline of the door mounting device 1, FIG. 3 is a side view, and FIG. 4 is a cross-sectional view taken along line AA of FIG.
[0030]
The door mounting apparatus 1 includes a carriage 10, and the carriage 10 connects a first and second vertical frames 11 a and 11 b arranged in parallel with a pair of the first and second vertical frames 11 a and 11 b. A substantially rectangular base frame 11 comprising horizontal frames 11c and 11d is provided, and a conveyor presser support bracket 12 projecting forward is extended at the front end of the first vertical frame 11a, and the front end of the second vertical frame 11b. A tire receiving support bracket 13 projecting forward is extended.
[0031]
A conveyor presser 30 is provided on the lower surface of the front end of the conveyor presser support bracket 12, and further elastically deformable by a shaft 14b extending outwardly via a guide roller support bracket 14a outside the front end of the conveyor presser support bracket 12. For example, a rubber guide roller 14 is provided.
[0032]
The conveyor presser 30 is configured by an air cylinder 31 having a conveyor pressing portion 31a that is supported at the bottom end of the front end of the conveyor presser support bracket 12 and protrudes downward.
[0033]
A tire receiver 35 that constitutes a relative positioning means together with the guide roller 14 is provided along the side surface of the tire receiver support bracket 13.
[0034]
The tire receiver 35 is fixed along the side edge of the tire receiver support bracket 13, the front end is bent downward, and protrudes from the front end of the tire receiver support bracket 13. The front end of the base end 35 a From the vicinity of the base end of the tire side surface abutting portion 35b to the tire side surface abutting portion 35b. The tire outer peripheral surface abutting portion 35c extending so as to be orthogonal to the tire is formed in a substantially square shape in plan view.
[0035]
Further, casters 36 are provided in the vicinity of the base end of the conveyor presser support bracket 12 and the lower surface in the vicinity of the front end of the tire receiving support bracket 13, respectively, and the brackets are also provided at the rear ends of the first and second vertical frames 11a and 11b. A caster 36 is provided via 36a.
[0036]
A pair of opposing vertical support frames 15 are erected on the first vertical frame 11 a, the middle portion of the vertical support frame 15 is connected by a central horizontal support member 16, and the upper horizontal support is provided between the top ends of the vertical support frames 15. A frame 17 is installed. Then, for example, a cylinder support portion 18 that supports one end of an elevating air cylinder 37 that protrudes upward at a substantially central portion of the central lateral support member 16 and serves as a movable holding portion elevating means is provided. A handle 19 is erected for each operator to hold the tip 19a and move the door mounting device 1.
[0037]
A movable holding portion 20 is supported on the vertical support frame 15 of the carriage 10 through a guide member 21 so as to be movable up and down.
[0038]
The movable holding part 20 has a pair of moving members 22 supported by the vertical support frame 15 via a guide member 21 so as to be movable up and down. The front end of the lateral member 23 is provided with a base end of a substantially L-shaped side sill presser support member 24 that extends downward and bends forward, and a flat side sill presser at the tip of the side sill presser support member 24. 38 is provided.
[0039]
The lower end of each moving member 22 is provided with a lower lateral member 26 extending substantially horizontally in the front-rear direction via a coupling member 25, and the other end of the elevating air cylinder 37 is coupled to the coupling member 25. A plurality of support rollers 39 are arranged in a row on the lateral member 26 via a support shaft extending in the horizontal direction, and the door movement restriction roller 40 is supported on the rear end of the lower lateral member 26 via a bracket. It is provided at a position higher than the roller 39.
[0040]
A pair of door presser support vertical frames 27 extending upward are provided upright at both ends of the upper horizontal support frame 17, and a door presser support horizontal frame 28 is installed between both upper ends of the door presser support vertical frame 27. The base end of an inverted U-shaped roller support member 43 provided with door support rollers 41 at both ends of the horizontal frame 28 and at the center of the door press support horizontal frame 28 with a door fall prevention roller 42 provided at the front end. It is swingably supported.
[0041]
Next, the operation of the door mounting device 1 configured as described above will be described.
[0042]
The door body D in which door glass, window regulators, door lock devices, and the like are assembled in the door equipment line DL has the movable holding portion 20 with the lifted air cylinder 37 extended in the lowered position and the air of the conveyor presser 30. The door mounting device in a state where the cylinder 31 contracts and the conveyor pressing portion 31a is in the raised position and the roller support member 43 provided with the door fall prevention roller 42 is opened upward as shown by a two-dot chain line in FIG. 1, the inner side of the door body D is supported by a door support roller 41, and the lower end is placed on a support roller 39 arranged in a row on the lower lateral member 25 and placed on the door mounting device 1. . The roller support member 43 is swung as shown by a solid line in FIG. 4 to prevent the door body D from falling by the door falling prevention roller 42.
[0043]
In the door mounting device 1 on which the door body D is placed in this way, one tire T is placed on the slat conveyor 45, and the other tire rolls on the floor F where the slat conveyor 45 is installed. By this, it is carried into the door attachment position IIb in synchronization with the vehicle body B that is conveyed.
[0044]
The door attachment device 1 carried onto the floor F on the side of the slat conveyor 45 at the door attachment position IIb can be moved on the floor F by the caster 36, and the operator holds the tip 19 a of the handle 19. Then, the door mounting device 1 is moved, and the conveyor presser 30 and the side sill presser 38 are inserted between the slat conveyor 45 and the side sill Ba of the vehicle body B as shown in a perspective view of FIG.
[0045]
2 and 5 show a side view of the main part from the direction of arrow C in FIG. 2, the tire side contact portion 35b of the tire receiver 35 provided integrally with the base frame 11 is used as the tire on the slat conveyor 45. On the side surface of T, the tire outer peripheral surface abutting portion 35c is pressed against the tire outer peripheral surface to perform relative positioning of the vehicle body B and the carriage 10 in the longitudinal direction of the vehicle body, that is, relative to the traveling direction of the main assembly line ML. Then, the guide roller 14 is brought into contact with the side surface of the side sill Ba to position the carriage 10 relative to the vehicle body B.
[0046]
The air cylinder 31 of the conveyor presser 30 attached to the carriage 10 is extended to press the conveyor pressing portion 31a against the upper surface of the slat conveyor 45, and the cylinder support 18 of the carriage 10 and the coupling member 25 of the movable holding portion 20 The movable body 20 is raised by contracting the elevating air cylinder 37 installed between the door body D on the support roller 39 provided on the lower side member 26 and the side sill presser support member on the upper side member 23. The side sill presser 38 provided via 24 is stopped in a state where it is pressed against the lower surface of the side sill Ba.
[0047]
The door hinge bracket Da provided on the door body D supported on the support roller 39 in a state where the conveyor presser 30 presses the slat conveyor 45 and the side sill presser 38 is pressed against the lower surface of the side sill Ba, It is maintained in the vicinity of the door hinge mounting portion at substantially the same height as a door hinge mounting portion (not shown).
[0048]
By pressing the conveyor pressing portion 31a to the upper surface of the slat conveyor 45 and pressing the side sill presser 38 to the lower surface of the side sill Ba, the door mounting device 1 is synchronized with the slat conveyor 45 and the vehicle body B by the friction force. The caster 36 that rolls on the floor F on the side of the conveyor 45 moves on the floor F along the slat conveyor 45 while maintaining the relative position between the vehicle body B and the door mounting device 1.
[0049]
While the door mounting device 1 moves in synchronization with the vehicle body 1, the operator can attach the door hinge bracket Da provided on the door body D, maintained near the door hinge mounting portion (not shown) of the vehicle body B, to the vehicle body B. The door body D can be easily attached to the vehicle body B by being attached to the door hinge attachment portion.
[0050]
Thereafter, the roller support member 43 provided with the door fall prevention roller 42 at the front end is swung as shown by a two-dot chain line in FIG. 4 so that the door fall prevention roller 42 and the roller support member 43 are placed on the door body D. The air cylinder 31 of the conveyor presser 30 is retracted from the upper side so that the conveyor pressing portion 31a is separated from the upper surface of the slat conveyor 45, and the liftable air cylinder 37 is extended to lower the movable holding portion 20 to lower the side sill presser. 38 is separated from the lower surface of the side sill Ba, and the synchronous movement of the slat conveyor 45, the vehicle body B, and the door mounting device 1 is released.
[0051]
Then, the operator grasps the tip 19a of the handle 19 to retract the door mounting device 1 from the door mounting position IIb, and finishes the door body mounting operation.
[0052]
The expansion and contraction operation of the air cylinder 31 and the lifting air cylinder 37 for the synchronous movement of the slat conveyor 45 and the vehicle body B and the door mounting device 1 or the release thereof is an operation provided in the door mounting device 1. This is performed by operating a switch (not shown).
[0053]
By repeating the above operation and work, the door main body D carried in by the door fitting line DL is sequentially assembled in synchronization with the vehicle main body B successively carried in by the main assembly line ML to the door mounting position IIb.
[0054]
Therefore, according to the door mounting apparatus 1 configured as described above, when the carriage 10 is synchronized with the movement of the vehicle body B, the side sills are moved by the lifting air cylinder 37 installed between the carriage 10 and the movable holding portion 20. Since the movable holding portion 20 is raised until the presser 38 comes into contact with the lower surface of the side sill Ba, the door body D placed on the support roller 39 is also raised according to the rise. Due to the difference in size, shock absorber, etc., the door body D rises in accordance with the vehicle type in which the height from the floor F where the slat conveyor 45 is installed to the door mounting position of the vehicle body B differs. Regardless of the difference, the door hinge bracket Da provided on the regular door body D is maintained in the vicinity of the door hinge mounting portion of the vehicle body B so that in mixed flow production. Door mounting work can be easily performed with ease.
[0055]
Further, the expansion and contraction of the air cylinder 31 of the conveyor presser 30 attached to the carriage 10 and the synchronous movement of the door mounting device 1 and the vehicle body B conveyed by the slat conveyor 45 and the release of the synchronous movement are only performed by the lifting air cylinder 37. This eliminates the need for protrusions and other complicated control means for locking the door mounting device for synchronous movement of the vehicle body B and the door mounting device 1 to the vehicle body, and simplifies the configuration. Since the device is inexpensive to manufacture and operates only with air, the operating cost can be reduced, and there is an effect that the vehicle body can be prevented from being damaged.
[0056]
In the above embodiment, the lifting air cylinder 37 for moving the movable holding part 20 up and down is installed between the cylinder support part 18 of the carriage 10 and the coupling member 25 of the movable holding part 20. It can also be installed between other structural members, and is not limited to the above embodiment, but can be variously modified without departing from the gist of the present invention.
[0057]
【The invention's effect】
According to the door mounting device according to the present invention described above, the tire receiver of the relative positioning means provided on the carriage is brought into contact with the tire of the vehicle body that is mounted on the slat conveyor and conveyed, and the guide roller is disposed on the side of the vehicle body. a by determining the relative position between the vehicle body and the bogie in contact and pressed against the side sill pressing the side sill lower surface raised the movable holding portion by the movable holding part moving means together with presses the conveyor pressing the slat conveyor top surface The door mounting device is moved synchronously with the vehicle body, and the door body also rises as the movable holding portion rises, and the door hinge bracket provided on the door body is maintained near the door hinge mounting portion of the vehicle body. Installation work becomes easy. Furthermore, a relative positioning means for determining the relative position between the carriage and the vehicle body is attached to the carriage by a tire receiver that contacts the tire provided on the vehicle body and a guide roller that is attached to the carriage and contacts the side of the vehicle body. By configuring, it is possible to avoid the possibility of causing scratches or the like on the vehicle body.
[0058]
Also, without stopping the car body transported by the slat conveyor, the door body can be easily mounted in synchronism with the transport of the car body even in mixed flow production, improving work efficiency and simplifying the configuration. Together with what is obtained, it contributes greatly to the automobile manufacturing field.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an automobile assembly line for explaining an outline of an embodiment of a door mounting device in a vehicle body assembly line according to the present invention.
FIG. 2 is a plan view of the door mounting device according to the present embodiment.
FIG. 3 is a side view of the door mounting device.
4 is a cross-sectional view taken along the line AA in FIG.
FIG. 5 is also a side view of the main part from the direction of arrow C in FIG. 2;
FIG. 6 is a perspective view of essential parts for explaining the operation of the door mounting device.
FIG. 7 is an explanatory diagram showing an outline of a synchronization device in a conventional assembly line.
FIG. 8 is an explanatory diagram for explaining the operation of the synchronization device shown in FIG. 7;
FIG. 9 is an explanatory view showing an outline of a door mounting device in a conventional assembly line.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door mounting apparatus 10 Carriage 14 Guide roller 20 Movable holding part 30 Conveyor presser 31 Air cylinder 31a Conveyor press part 35 Tire receiver 37 Lifting air cylinder 38 Side sill presser 45 Slat conveyor B Car body main body Ba Side sill D Door main body F Floor T Tire

Claims (1)

In a door mounting device in a vehicle body assembly line that moves synchronously with a vehicle body that is placed on a slat conveyor and is transported, and attaches the door body to the vehicle body.
A carriage movable on the floor where the slat conveyor is installed;
A conveyor presser provided integrally with the carriage and selectively press-contacted and separated from the upper surface of the slat conveyor;
A movable holding part that is supported by the carriage so as to be movable up and down and that supports the door body;
A movable holding unit elevating means installed between the carriage and the movable holding unit to raise and lower the movable holding unit;
A side sill presser that is provided integrally with the movable holding portion, presses against the lower surface of the side sill of the vehicle body by raising the movable holding portion, and separates from the lower surface of the side sill by lowering the movable holding portion;
Relative position of the bogie and the vehicle body comprising a tire receiver that is attached to the bogie and contacting a tire provided on the bogie body and a guide roller that is attached to the bogie and abuts against the side of the vehicle body. Relative positioning means for determining;
A door mounting device in a vehicle body assembly line.

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