JPS59114172A - Conveyor having self-propelled door carrier for attachment of door of automobile - Google Patents

Abstract

PURPOSE:To automate majority of the attachment work of a door, by supporting a hanger for mounting the door on each of self-propelled carrier rotatably, ascendably and descendably. CONSTITUTION:A hanger 15 supporting a door 43, which has made a self-propelled movement and stopped at a predetermined position, waits the arrival of a body 2. When the body 2 is arrived at the predetermined position by a conveyor 1, the hanger 15 is locked by turning it 65 degrees through a motor-driven cylinder and a clutch of a running motor 7 is disengaged. When metal fittings 55 of the tip of the hanger is hit against the predetermined position of the body 2, a carrier 8 is pushed by the body 2 and advanced. Then the hanger 15 is made to ascend by starting the motor-driven cylinder 27 through operation of a button. When stop metal fittings 67 secured to the hanger 15 abut against the body 2, the motor-driven cylinder 27 is suspended. The door 43 is made to advance by the motor-driven cylinder and hinge metal fittings 68 are fixed to the door 43 with a bolt under the above-mentioned state. After completion of mounting, connection of the hanger 15 with the body 2 is released by revolving the hanger 15 in the reverse direction, then the hanger 15 is made to descend and the carrier 8 is made to retire by advancing the same.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a conveyor having a self-propelled door carrier for attaching and detaching automobile doors for use in an automobile assembly plant.

At automobile factories, in order to make the entire car body the same paint color, the doors are attached to the body and then painted, and then the seats and other parts are installed inside the body. In that case, it is difficult to do interior work if the door is left alone, so the door is first removed and the interior work is done, and then the door is reinstalled. Such door installation and removal work is done on an assembly line. This is done during body transfer, but since the door is quite heavy, conventionally a carrier travel line is provided that moves parallel to the body while maintaining a fixed positional relationship on the body transfer line, and the rails provided on the carrier are A hanger on which the door is placed is introduced by a running roller, and the rail is raised and lowered by a carrier or a lid, and the hanger is manually rotated so that the door rail supporting the door on the hanger faces in a direction suitable for attaching and detaching the body. After completing the door installation/removal work, the carrier is manually moved backwards or moved to another location using a drive chain, but in the former case, the work efficiency is low, and even in the latter case, the hanger cannot be moved at any position. Since it cannot be raised or lowered, there are drawbacks such as the inability to promptly respond to changes in the door attachment/detachment position.

In order to eliminate the above-mentioned drawbacks, the present invention supports a door mounting hanger on each self-propelled carrier so that it can be rotated up and down, and furthermore, uses power to rotate the hanger and move the door on the hanger. An object of the present invention is to provide a conveyor having a self-propelled door carrier+ for attaching and detaching an automobile door, which can also be automated.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an overhead conveyor for transporting automobile bodies, and a body 2 is transported in the direction of the arrow by means of a hanger (not shown). 3 is a door transfer conveyor that runs parallel to the conveyor 1, and is fixed to the auxiliary beam 4 as shown in Figures 2 and 3! Rollers 6 running on the molded ceiling rail 5 back and forth
The carrier 8 having the travel motor 7 moves by itself.

The traveling motor 7 is supplied with power from a trolley wire (not shown) via an electric wire, and as described later, when the carrier 8 is to be moved to follow the conveyor 1, the clutch is disengaged to separate the motor 7 from the traveling rollers 6. 9 is a guide roller in contact with the rail 5.

The frame 10 of the carrier 8 has a lower vertical portion ItA11.
A guide roller 13 is pivotally supported by an arm 12 that protrudes laterally from the carrier 8, and the roller 13 fits into a guide rail 14 supported by the auxiliary beam 4 to prevent the carrier 8 from swinging laterally when the door is being attached or removed. .

A suspension device 16 is provided on the lower vertical member 11 to suspend the hanger 15 so as to be rotatable and movable up and down. This hanging device 16 is
As shown in Figures 4 to 6, lower vertical portions on both sides + Al1
In between, there is a gate-shaped frame 17 fixedly protruding upward, an elevating frame 21 whose rollers 20 are fitted into grooved rails 19 fixed to the inside of the support column 18 to guide the movement up and down, and further fixed to the inside of the elevating frame 21. A support frame 24 in which rollers 23 are fitted into the grooved rails 22 to guide and move up and down, and a lift frame 24 for cushioning and supporting the lift frame 21 on the support frame 24. - A coil spring 26 inserted into the bolt 25 taken out from the frame 21, an electric cylinder 27 that drives the support frame 24 up and down with respect to the frame 10 and raises and lowers the lifting frame 21 via the spring 26, and a parallelogram. Link mechanism 28
and a fish 31 which is fixed to the center of the lower part of the lifting frame 21 and rotatably supports the hanging pin 29 of the hanger 15 together with a nut 30.

The parallelogram link mechanism 28 includes eight equal-length links 34, one end of which is pivotally connected to the front and rear outer sides of the support frame 24 and the lower vertical part 11 by pins 32 and 33, respectively, and the other ends of the eight equal-length links 34 are connected to horizontal rods 35 on both sides. A bracket 38 is formed by being pivotally connected to the frame 10 by pins 36 and 37 and is fixed to the frame 10.
Connect the rond of the electric cylinder 27 with one end pivoted to the pin 37.
The hanger 15 is raised and lowered by the electric cylinder 27.

The hanger 15 includes, for example, a pair of hanger rods 40 that hang down eccentrically from a boss portion 39 to which a hanging pin 29 is fixed, and a number of resin rollers 42 that are pivotally supported on a horizontal frame 41 that is fixed at the lower end of the hanger rods 40. The door 43 is placed on the roller 42.

In order to hold the door 43 in the normal vertical position in the hanger boss portion, a rotation shaft 44 is supported on the hanger rod 40, and a pair of U-shaped holding rods 45 that can be entered and exited through the window of the door 43 are fixed to this. By operating the handle 46, the holding rod 45 is rotated, and the door 43 is held between a pad 47 at the tip thereof and a pad 48 supported by a spring on the hanger rod 40.

In order to lock the hanger rod 40 in a position parallel to the moving direction of the conveyor 1 and in an angular position suitable for attaching and detaching the door, the center of the hanger rod 40 is set at approximately 65 degrees to a circular protrusion 49 protruding from the hanger boss portion 39 as shown in FIG. Two grooves 50 at the corner
A lock lever 51 is pivotally supported at the lower part of the elevating frame 21, and when the hanger 15 is rotated, the lock lever 5
19 is configured so that the tip thereof engages in one of the grooves 50 by its own weight. To release the lock, pull the string 52. In addition to manual rotation, the hanger 15 can be rotated electrically by having an electric cylinder 53 horizontally rotatably supported on the lifting frame 21 as shown in FIG. You can also do it.

In the door attachment/detachment section of the conveyor 1, the carrier 8 is kept in a constant position relative to the body 2 and travels synchronously.
), and when the clutch of the motor 7 is disengaged and waiting, the locking metal fitting provided on the hanger of the body 2 is connected to the hanger 1.
It is configured to engage with the end fitting 55 of No. 5 and carry the carrier 8 along with it.

The synchronous traveling can also be performed by controlling the speed of the traveling motor 7. In this case, the door attachment/detachment section should be placed on a conveyor.
A well-known rotary potentiometer is installed that moves forward with the door and quickly retracts to the next ζ day position after the door installation/removal work is completed.
The rotary arm engages with the carrier 8 or the hanger 15 and is configured to rotate according to the relative position between the body 2 and the hanger 15, and by the output of the rotary potentiometer when the relative position deviates from the normal position. Travel motor 7
The speed control is performed. The retraction of the rotary potentiometer is controlled by the electric cylinder 27.53 and the hanger 1, which will be described later.
It can be operated by a computer together with the sequential operation of the electric cylinder 56 for door movement on the top 5, but individual operation by manual buttons is also possible. Rotary potentiometers are provided separately for the front door and rear door, and the synchronization position can be changed depending on the vehicle model by inputting the vehicle model code into the computer.

The door 43 is attached to a hanger 15 to automate the door attachment/detachment work.
When moving by power, horizontal support rails 57 and guide rails 58 are fixed to the lower end and middle part of the hanger rod 40, respectively, as shown in FIGS. 8 and 9, and the upper part of the support rails 57 is moved. The door 43 is placed on a resin receiver 62 of a movable frame 61 which is moved by rollers 59 and prevented from falling by fitting a roller 60 into a guide rail 58, and is provided between the movable frame 61 and the support rail 57. The movable frame 61 is moved forward and backward by the electric cylinder 56. In order to prevent the door 43 on the movable frame 61 from falling over, a horizontal rotation shaft 63 similar to that shown in FIG. 1 is provided at the upper end of the movable frame 61.
, the holding rod 64, the handle 65, the band 66°67, etc. are attached.

Next, the installation work of the door 43 will be explained.

First, the hanger 15 supporting the door 43 moves by itself and stops at a predetermined position to wait for the arrival of the body 2. When the body 2 is brought to a predetermined position by the conveyor 1, the hanger 15 is rotated and locked by 65 degrees manually or by the electric cylinder 53, and the clutch of the travel motor 7 is disengaged. When the hanger end fitting 55 hits a predetermined location on the body 2, the carrier 8 is pushed by the body 2 and moves forward. Then, by operating a button, the electric cylinder 27 is activated to raise the hanger 15. When the stop metal fitting 67 fixed to the hanger 2 hits a predetermined location on the body 2 as it rises, the electric cylinder 27 stops. In this case, the spring 26 of the lifting frame 21 prevents the body 2 from being damaged. In this state, the door 43 is moved forward manually or by the electric cylinder 56, and the hinge fitting 68 is attached to the door 43 with bolts.

After the attachment is completed, the hanger 15 is rotated in the opposite direction to release it from the body 2, and then lowered, and the clutch of the travel motor 7 is engaged to move the carrier 8 forward and away. Note that the removed door 43 is transferred to a hanger on a door attachment transfer line by a lifter (not shown).

The door attachment/detachment work described above can be automated by computer control, except for manual operation of the handle 46.65 and attachment/detachment of the hinge fittings 68.

Figure 10 shows a front door 43a and a rear door 4 on the same Podium 2.
3b, the carrier 8 circulates freely along the long i-shaped conveyor 3a, and a lifter 69 loads and unloads the door onto the hanger. body 2
The carrier 8a moves at a constant speed in the direction of the arrow, and the carrier 8a starts from point A, travels in synchronization with the body 2 from point 0, and completes the work of attaching and detaching the front door 43a by the time it reaches point D. carrier 8a
Before the next carrier 8b reaches point D, the next carrier 8b starts at high speed from point B, and when carrier 8a7'J< D reaches point F, it reaches point F, which is before it, and from there it runs in synchronization with body 2. The work of attaching the rear door 43b is completed before reaching point G. After finishing the work of attaching and detaching the front door 43a at point D, the worker returns to point F and starts attaching and detaching the rear door 43b. The distance between D and F should be at least 3m for safety. G
After finishing the work of attaching and detaching the rear door 43b at point 0, the worker returns to point 0 and starts attaching and detaching the next door of the body 2. The walking time between G and 0 shall be included in the time required for attaching and detaching the front door 43a.
It is assumed that one worker is required to attach and detach the front and rear doors on one side of the body 2.

However, if the working capacity is insufficient, as shown in Figure 11,
The front door transfer conveyor 3b and the rear door transfer conveyor 3c may be provided separately, and the lifter 69 may be used to transfer the door between the two conveyors.

In the present invention, as described above, the hanger is lifted up and down and rotatably suspended on the carrier that moves along the door transport conveyor for attaching and detaching the door, so the position of attaching and detaching the door can be changed freely, saving labor and the work of attaching and detaching the door. It has the effect of improving efficiency, and it also makes it easier to carry the removed door and the installed door in. With the exception of some tasks such as attaching and detaching hinges, door attaching and detaching work can be automated for different vehicle models. It has a soothing effect.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with FIG. 1 being a plan view and FIG.
The figure is an elevation view, Figure 3 is a side view, Figure 4 is a plan view of the lifting device, Figure 5 is a sectional view taken along line A-A in Figure 4, and Figure 6 is B-B in Figure 5. Line cross section, 7th v! J is a sectional view taken along line C-C in FIG. 6, FIG. 8 is an elevational view of a hanger of another embodiment, FIG. 9 is the same (side view), and FIG. 10 is a plan view of a conveyor line to which the present invention is applied. , FIG. 11 is a plan view of another conveyor line. 7... Travel motor 8... Door carrier 15.
... Hanger 16 ... Lifting device 27 ... Driving source for raising and lowering the hanger Agent Patent attorney Yuyosuke - 1 other person Fig. 1 Fig. 2 b / 41 Fig. 6 Fig. 7

Claims (1)

[Claims] A door carrier driven by a traveling motor equipped with a clutch is driven by a traveling motor equipped with a clutch and moves along the door attachment/detachment section of an over/rad conveyor for transferring automobile bodies, and a hanger for door transfer is placed on the carrier in the optimal position for attaching and detaching the door. 1. A conveyor having a self-propelled door carrier for attaching and detaching a door of an automobile, characterized in that the door carrier is suspended by a lifting device capable of lifting the vehicle, and the door carrier is provided with at least a drive source for raising and lowering a door.