JPH03159886A - Door transport device - Google Patents

Abstract

PURPOSE:To simplify the line for car assembly by coupling transfer devices of a door removing process, assembly process, and processes situated on the way, constituting a door transport device of said car assembly line, through a hanger device which simultaneously transports a plurality of pallets as one set whereon doors for one car are placed. CONSTITUTION:A door transport line l tying together transfer device 1-4 of different processes is constituted from a hanger device 5. Hanger of this device 5 accepts four empty pallets P loaded on the left and right and at the front and rear, and they are moved to a door removing process S1 to reach an empty pallet transferring device 1a of the No.1 transfer device 1. The pallet P is introduced to the door removing process S1 by an elevating/sinking device 6. Meantime the removed doors are placed on the pallet P, and doors for one car are as a set placed upon the hanger device 5 to be forwarded to the next stage. This method of transporting the doors for one car simultaneously allows making the line simple and small.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is directed to, for example, a vehicle assembly line, in which a door is removed from a vehicle body in a door removal process on the main line, and the door is transferred to a door conveyance line. In a door conveyance device that assembles door parts, etc. on a door subassembly line connected to a tor conveyance line, and also transports the doors after completion of subassembly to the door installation process on the main line, the door 1
Il! This invention relates to a conveyance device that simplifies and unifies a conveyance line.

(Prior Art) Conventionally, for example, on a vehicle assembly line, after a painting process, etc., a door that has been attached to a vehicle body is removed, a small door assembly is assembled to the door, and the door is reattached to the vehicle body. At this time, the removed door must be transported on a door transport line that is separate from the main line on the vehicle body side, and then rejoined to the main line and attached to the vehicle body. For example, as a conveying device for conveying
Devices such as No. 7075 and Japanese Unexamined Patent Publication No. 119479/1988 are known.

In the case of the former Japanese Patent Application Laid-Open No. 59-57075, the door removed at the door removal station is placed on each left and right door hanger and transported by a dedicated door transport line, and the assembled door is transferred in the same manner. After transporting the empty door hanger to the door installation station, the empty door hanger is to be returned to the door removal station using a single return line.

In the case of the latter, JP-A No. 61-119479, the door removed at the door removal station is sent to a door subassembly line configured by a floor conveyor, and the assembled door is transferred from the floor conveyor to a door hanger. The door mounting station is about to be transported.

(Problem to be Solved by the Invention) However, in the case of conventional door conveyance devices, including the two examples mentioned above, the conveyance lines for the removed doors are configured separately for the left and right, and a door hanger is required for each line. from,
The transport device was large-scale, which caused problems in terms of space and equipment costs.

In addition, in the case of the later-named Japanese Patent Application Laid-Open No. 61-119479, when transferring from the floor conveyor to the toa hanger, there was a risk that the transfer would not be successful unless the positioning of the toa and toa hanger was made with great precision. .

(Means for Solving the Problem) In order to solve this problem, the present invention transports the door removed from the vehicle body in the door removal process to the door assembly process, and then performs a door installation process to attach the door to the vehicle body. In a door conveyance device configured to convey up to 2nd and 3rd transfer devices were installed. and,
A tor transport line is formed from these first transfer devices to the fourth transfer device via the second and third transfer devices, and the hanger device of this door transfer line is designed to handle the load for one car body. A plurality of pallets on which doors are respectively placed are configured to be conveyed simultaneously as one set.

(Operation) The door removed in the door removal process is placed on the hanger device of the door conveyance line by the first transfer device and the lifting device. For example, two doors on the left and right, and in the case of four doors, four doors on the left, right, front, and back are transported along the door transport line in the roadway. The door components are then transferred to a door subassembly line such as a factory, etc., where door parts are assembled.

Next, it is transferred to the hanger device again by the third transfer device, and is transferred to the fourth transfer device for the door installation process on the door transfer line in the roadway. For this reason, the door conveyance line is downsized,
Simplification is possible, and the positioning of the door and the hanger device can be simplified.

(Example) An example of the door conveyance device of the present invention will be described based on the attached drawings.

Fig. 1 is an explanatory diagram showing the general structure of the door conveyance device of the present invention, Fig. 2 is a plan view of the first transfer device, and Fig. 3 is I+1 in Fig. 2.
FIG. 4 is an enlarged side view of the transfer device as seen from direction IV in FIG. 2.

As shown in FIG. 1, the door conveyance device of the present invention removes the door of a vehicle conveyed from the main line L indicated by a dashed dotted line in the figure in a door removal step S1, and conveys the vehicle body as it is on the main line L. At the same time, the door is removed in step S1.
The elevating device of the first transfer device 1 provided at the door is arranged to send the materials to the door conveyance line A.

This door conveyance line A, as shown by the solid line in FIG.
Via the second transfer device 2 and the third transfer device 3 before and after the door subassembly line S2, which is configured at a position higher than the main line L and is provided in the middle of the conveyance path for the door assembly process, It is connected to the fourth transfer device 4 provided in the door attachment step S3 and equipped with a lifting device, and then follows a circular route to reach the first transfer device 1 again.

A hanger device 5 is provided on the tor conveyance line ℃ for conveying the pallets P placed on the tor all at once, and the pallet of this embodiment is configured for a four-door vehicle, is considered to be one set.

The first transfer device 1 has a transfer line ℃ as shown in FIG.
A pair of transfer devices 1a. 1b is provided, and each of these transfer devices 1a1b has the same configuration, and a pair of lifting devices 6.6 are separately provided on the left and right between the front and rear transfer devices 1a and Ib. This configuration is the same in the case of the fourth transfer device 4 shown in FIG.
, 7 are arranged.

Further, the configurations of the second transfer device 2 and the third transfer device 3 are as follows:
Each transfer device Ia of the fourth transfer devices 1 and 4. lb, 4a, 4
The structure is the same as that of section b, and hereinafter each of these transfer devices 1a and I
b, 2, 3, 4a, and 4b will be explained using the device 1a on one side of the first transfer device 1 as a representative example.

This transfer device 1a receives four empty pallets P from the hanger device 5 at the center of the tor conveyance line °C, separates them into two on the left and right, and transfers them onto the conveyance rollers 24 shown in FIG. Then, the next lifting device 6 is sent. In order to simultaneously transport the four pallets P toward the transport rollers 24, four transfer units having the same configuration are provided.

This transfer device 1a, as shown in FIGS. 3 and 4,
Lifting cylinder unit 1 installed horizontally on a base 11
2 and this elevating cylinder unit] 2, each pair of elevating cam plates 13, 13, front and rear are connected to the elevating cylinder unit.
An inclined surface is formed on the upper surface, and a roller 16 at the end surface of the cross spar 15 is supported on this upper surface. A plurality of cross pars 15 are provided in a direction parallel to the tor conveyance line °C, and a pair of rails 17 and 17 are attached to both ends of the cross par 15 in a direction perpendicular to the cross pars 15. Also, a pair of guide rollers 18, 18 are provided at the middle part of the rail 17 in the width direction, and these guide rollers 18, 18 slide up and down while sandwiching the guide portion 19a of the guide member 19 erected on the base 11. It is said to be free.

Further, a truck 2o is provided on this rail 17, and this combination truck 2o is configured to be able to run freely in a groove on the upper surface of the rail 17 by a drive section 21 at the end of the rail 17. The traveling drive of the truck 20 by the drive unit 21 is achieved by, for example, a pair of sprockets 22 provided at both ends of the rail 17.
An endless chain or the like is wound around a and 22b to perform drive transmission.

Further, a plurality of pins 20a are provided on the upper surface of this cart 20 so as to be engaged with engagement holes of a pallet P, which will be described later.

The rail 17 configured in this way can be raised and lowered by the lifting cam plate 13 that slides by the operation of the lifting cylinder unit 12.

The aforementioned conveyance roller 24 on the outer end side of the rail 17 is provided on a support stand 23 erected on the base 11 as shown in FIG. 3, and a subrocket 24a provided on the roller shaft has a A chain (not shown) that is wound around the subrocket 25a of the lower drive source 25 is connected and rotated by the operation of the drive source 25. The driving force is also transmitted between the other conveying rollers 24 by a transmission mechanism (not shown).

A pair of elevating and lowering devices 6.6 are provided downstream of the left and right conveyance rollers 24, 24, and the elevating and lowering devices 6 will be described below with reference to FIGS. 5 to 7.

5 is an enlarged plan view of the lifting device 6, FIG. 6 is a front view seen from the V1 direction in FIG. 5, and FIG. 7 is a side view seen from the ■ direction in FIG. .

As described above, this lifting device 6 is movable up and down between the door conveyance line ℃ at a high position above and the door removal process S1 below, and lowers the empty pallet P downward to remove the removed door. The pallet P loaded with the door is then raised and sent to the upper door conveyance line.
A pillar 31 is erected laterally apart from the pillar 31.
An elevating body 32 that can be moved up and down is provided. That is, an overhanging guide portion 31a is provided along the vertical direction on both sides of the opposite side of the support 31 having a rectangular cross section.
The elevating body 32 is movable up and down by a drive device (not shown) by engaging a pair of upper, lower, left, and right engaging portions 35 formed by three guide rollers 33, 33, and 34 with the guide portion 31a. There is.

Further, this elevating body 32 is provided with a four-wood receiving material 36 extending in a direction perpendicular to the conveying direction, and a sliding member 37 that can freely slide on a rail portion 36a on the upper surface of this receiving material 36 has two A connecting member 39 is provided that connects the cylinder rods 38a, 38 of the cylinder units 38, 38 for advancing and retracting, respectively.
a The tip is tied. The tip of the sliding member 37 extended by the extension of the cylinder unit 38 is attached to the conveying roller 24 and the support base 23 below it, as shown in FIG. A notch 40 as shown is provided. Moreover, the sliding member 3
A pin 37a for engaging with an engagement hole of a pallet P, which will be described later, is provided on the upper surface of the tip end side of the pallet 7 in a protruding manner.

On the other hand, in the lower tor removal step S1, a support stand 42 and a roller 43 are provided on both sides of the main line L, and the relative position of this support stand 42 and the support column 31 is the same as that of the upper support stand 23 support stand 43. A cutout similar to the cutout 40 is also provided at the same position relative to the cutout 31.

Next, the hanger device 5 configured in the door conveyance line ℃ will be explained using FIG. 3 and FIG. 8. Incidentally, FIG. 8 is a side view of the hanger device.

The hanger device 5 includes a hanger rail 52 with an I-shaped cross section that is provided at a high position above along the tor conveyance line ℃, and a pair of front and rear tor hangers 53, 53 that run on the hanger rail 52.
These door hangers 53 are provided with a plurality of transport rollers 54, 54, . . . . The conveyance roller 54 has a roller shaft 1l supported by a housing 55, so that it can be moved on the upper surface of the hanger rail 52, and is connected to a drive device 56 at one predetermined location. Further, the housing 55 is provided with respective hanging portions 57, and one of the door hangers 53 has a pair of hanging portions 57.
A horizontal rod 58 is disposed between the horizontal rods 57, and vertical rods 59, 59 are attached to the front and rear of the horizontal rod 58.

And on the lower end side of the two vertical rods 59, 59, there is a pallet P.
A pair of pallet receiving members 60 are provided for supporting the hanger rail 52, and as shown in FIG. It is structured as a body. Further, the pallet receiving member 60 has a pin 60a protruding from its upper surface which engages with the engagement hole of the pallet P. Furthermore, between the front and rear door hangers 53, there is a combination rod 61.
6. Next, regarding the pallet P on which the tor will be placed, a 9th This will be explained using FIG.

In addition, Fig. 9 shows the pallet P1 and the first pallet for front door transportation.
Figure 0 shows a pallet P2 for rear door transportation, each figure A is a plan view, each figure B is a side view, and each figure CD is a left and right front view, respectively.

As shown in FIG. 9, the front door pallet P1 supports the lower end of the door with two supporting members 72 and 73 provided on the base plate 71, and has a holding member 74 that holds the front door hinge side and a rear side holding member 74 that holds the front door hinge side. The door is held at a total of four locations including a holding device 75 for holding the door.

Of these, the rear holding device 75 includes a mounting member 76 slidably attached to the rail portion 71a on the board 71 side, and a swinging arm 77 pivotally mounted to the mounting member 76. A link mechanism 78 is provided between the mounting member 76 and the mounting member 76.
An L-shaped plate 80 connected to the upper front side of the swing arm 77 via two upper and lower elastic members 79 is made swingable. A holding member 81 for holding the toe end is provided on the side of this L-shaped plate 80. Further, in front of the link mechanism 78, a stopper member 82 is disposed on the mounting member 76 to restrict movement of the link mechanism 78.

On the board 71 of this Pareto P, there is a dolly 2 of the transfer device 1a.
0 and the hanger device 5.
A retaining hole 92 that engages with the pin 60a of the first Pareto receiving member 60 is bored.

The former engagement hole 91 is connected to the sliding member 37 of the lifting device 6.
It is also engaged with the pin 37a.

The rear door pallet P2 has almost the same structure as the front door pallet P1, as shown in FIG. The only difference is that it is fixed at 71.

An outline of the operation of the present door conveyance device having the above configuration is as follows.

A total of four empty pallets P are mounted on the toe hanger 53, which runs in the direction of the arrow in the door conveyance line ℃ in Fig. 1 and is conveyed from the right side. It reaches the transfer device 1a for pallet transfer.

In this transfer device 1a, as shown in FIGS. 3 and 4,
The rail 17 has descended downward, and the cart 20 on the rail 17 has moved toward the center on the door hanger 53 side and is waiting. (For the sake of explanation, FIGS. 3 and 4 show the door placed on the pallet P.) When the empty pallet P arrives, the lifting cylinder unit 12 is activated, and the lifting cam plate 13 is activated. to raise the rail 17 and fit the bins 20a on the upper surface of the cart 20 into the engagement holes 91 of the empty pallet P to engage them.

Therefore, the empty pallet P is separated from the pallet receiving member 60 at the bottom of the door hanger 53 and lifted.
The state shown in FIG. 4 changes to the state shown in FIG. 11.

Next, the cart 20 is moved on the rails 17 by the drive unit 21 shown in FIG. 3, and the empty pallet P is separated and transferred from the left 15 to the right. When the cart 20 reaches the position of the transport roller 24, the rail 17 is lowered by the operation of the lifting cylinder unit 12 again, and the empty pallet P is placed on the transport roller 24.

The empty pallet P thus sent onto the transport roller 24 is
Sent to the first lifting device 6, lower door removal step S1
sent to. That is, as shown in FIGS. 5 and 6, the elevating body 32 of the elevating device 6 is in the raised position, the cylinder unit 38 is in the extended state, and the sliding member 37 is waiting below the conveying roller 24, When the empty pallet P is transferred, the elevating body 32 further moves upward, and the pins 37a on the upper surface of the sliding member 37 are fitted into the engagement holes 91 of the empty pallet P to be held and received from the conveyance rollers 24. Next, as the cylinder unit 38 retires, the elevating body 32 descends, and the cylinder unit 38 is extended again to place the empty pallet P on the rollers 43 below.

On this pallet P, the door removed in the door removal step S1 is placed. That is, the front door is placed on the front door pallet P1 shown in FIG. 9, and the rear door is placed on the first pallet P1 shown in FIG.
Support member 72.7 of rear door pallet P2 shown in Figure 0
3, and are sandwiched back and forth between a holding member 74 and a holding device 75 to hold the door.

When the loading is completed, the pallet P is raised again by the lifting device 6 in the reverse order of the above procedure, placed on the upper conveyance roller 24, and transferred to the next transfer device 1b.

In the transfer device 1b, the cart 2 on the rail 17 shown in FIG.
0 is waiting below the conveyance roller 24 side, and an empty hanger 53 is waiting on the hanger rail 52 in the center. When the pallet P carrying the tor arrives, the rail 17 moves up and the pallet P is transferred to the trolley 20 side.
After transporting the toahanga 53 using this trolley 20,
It is mounted on the door hanger 53. At this time, the door hanger 53 and the pallet P are engaged with each other by the pin 60a of the pallet receiving member 60 of the door hanger 53 and the engagement hole 92 of the pallet P.

The door hanger 53 is self-propelled by a drive device 56 shown in FIG. 8, and heads toward the second transfer device 2 shown in FIG.

A door assembly line S2 is provided between the second transfer device 2 and the third transfer device 3, and a pallet of each door is moved by the second transfer device 2 having the same configuration as the first transfer device 1a. The pallet P is separated into left and right parts, and the door parts are assembled while the pallet P is transported by, for example, a floor conveyor. During this time, the empty door hanger 53 is transported to the third transfer device 3 by the central hanger rail 52 and kept on standby.

When the pallets P for which the door subassembly has been completed reach the third transfer device 3, they are loaded all together on the tor hanger 53 again in the same procedure and transported to the fourth transfer device 4.

The configuration of the fourth transfer device 4 is also similar to the configuration of the first transfer device 1, that is, after the left and right pallets P are separated and transferred by the transfer device 4a, they are sent to the lower door installation step S3 by the lifting device 7. , the door is attached to the vehicle body, and the empty pallet P is again returned to the empty hanger 53 above and forwarded toward the first transfer device 1.

(Effects of the Invention) As described above, the door conveyance device of the present invention configures the door conveyance line with a single line, and has two doors for one car.
In the case of a door, two doors on the left and right, and in the case of a four-door, four doors on the left, right and front are conveyed at the same time using one door hanger, making it possible to downsize and simplify the door conveyance line. Even when mounting the toe hanger on the toe hanger, the positioning mechanisms for both can be easily and simply configured.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the general door conveyance device of the present invention, and FIG.
The figure shows a plan view of the first transfer device, FIGS. 3 and 4 show enlarged views of the transfer device, FIG. 3 is a front view seen from the ■ direction in FIG. FIGS. 5 to 7 are enlarged views of the lifting device, FIG. 5 is a plan view, FIG. 6 is a front view as seen from the V1 direction in FIG. 5, and FIG. Figure 7 is a side view of Figure 5 as seen from direction 19, Figure 8 is a side view of the hanger device, Figures 9 and 10 are pallets, Figure 9 is a front door pallet, Figure 10 is The figure shows a rear door pallet, and FIG. 11 is a side view of the transfer device. In the figure, 1 is the first transfer device, 2 is the second transfer device, 3 is the third transfer device, 4 is the fourth transfer device, 5 is the hanger device, and 6
．． 7 is a lifting device, 17 is a rail, 20 is a trolley, 24 is a conveyance roller, 32 is a lifting body, 37 is a sliding member, 52 is a hanger rail, 53 is a door hanger, S1 is a door removal process,
S2 indicates the door subassembly line, S3 indicates the door installation process, P indicates the pallet, L indicates the main line, and text indicates the door conveyance line.

Claims (1)

[Claims] In a door transport device for transporting doors, which removes the door from the vehicle body in the door removal process, assembles door parts to this door in the door assembly process, and then reinstalls the door on the vehicle body in the door installation process, this transportation device is , a first transfer device provided in the door removal process and equipped with a lifting device;
A second and third transfer device provided on both sides of the door assembly process, a fourth transfer device provided in the door installation process and equipped with a lifting device, and these first, second and third transfer devices. 3. 4th: It consists of a hanger device for a door transport line that connects each transfer device to form a transport path, and this hanger device consists of a set of multiple pallets on which doors for one car body are placed, respectively. A door conveyance device characterized in that it is configured to convey at the same time.