JPH11189321A - Conveying line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent workability from being deteriorated by reliably loading various kinds of car bodies on hangers even in a coating line in which three or more kinds of car bodies are mixed, and decreasing parts to be made into shadows in coating. SOLUTION: First rotational members 4 to be rotated on the horizontal surface is rotatably mounted on the lower end of a hanger 1 for supporting a car body, rotational tables 5a, 5b to be rotated on the horizontal surface are provided on two parts on the first rotational members 4, and plural kinds of attachments 6 so formed as to correspond to the shape of the car body are arranged on both rotational tables 5a, 5b. The first rotational member 4 and the rotational tables 5a, 5b are selectively rotated before the car body is supplied to the hanger 1, and any attachment 6 is made to wait in the position facing the work supplying position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a transfer line for transferring a plurality of types of works on the same line among transfer lines for transferring a work while supporting the work with a hanger.

[0002]

2. Description of the Related Art A high-viscosity vinyl chloride-based paint (PVC) having an impact-absorbing property is applied to the underside of the floor of a vehicle body of an automobile in order to prevent damage from flying stones. In this type of painting line, it is common to transport the vehicle body in a state of being hung by a hanger in consideration of workability when painting the back surface of the floor (for example, JP-A-63-200859). ,
As shown in FIG. 9, the vehicle body 40 is positioned and held on the hanger 41 by an attachment 42 provided at the tip of the hanger 41.

[0003]

When two types of vehicles are mixed in the above-mentioned transport line, it is necessary to replace a hanger attachment according to the type of vehicle. Conventionally, as shown in FIG. 10, a rotating arm 43 is mounted at a position 180 ° opposite to a lower end of a hanger 41, and two types of attachments 42 are mounted on both outer diameter ends of the hanger 41, respectively. In accordance with the type, the two rotating arms 43 are integrally rotated by 180 ° about the vertical axis O, the corresponding attachments 42 are arranged immediately below the vehicle body 40, and then the vehicle body 40 is lowered to attach the attachment 42 to the vehicle body. It is engaged with the bottom part.

However, in this structure, it is difficult to cope with a case where three or more types of vehicle bodies are mixed. That is, in this case, since the same number of rotating arms 43 as the number of types of the vehicle body project radially from the lower end of the hanger, the unused attachments and the rotating arms supporting the same are P
There is a possibility that a shadow may be formed in the coating area during the VC coating to deteriorate the coating workability.

Therefore, the present invention can reliably mount various kinds of works on a hanger even on a transport line where a plurality of kinds, particularly three or more kinds of works (for example, a car body) are mixed, and furthermore, in a work process such as painting. An object of the present invention is to provide a transport line that does not impair workability.

[0006]

In order to achieve the above object,
The transfer line according to the present invention has a plurality of hangers that support the work by engaging an attachment with the work, and sequentially feeds each hanger to a work station that performs a predetermined work on the work with the work mounted. The attachment is formed in a shape corresponding to each type of work, and before the work is supplied to the hanger, any one of the attachments is selected and the attachment is moved to the work supply position. The first hanger is rotatably provided on the hanger, the second hanger is rotatably provided on the first hanger, and a plurality of attachments are provided on the hanger. Placed on a rotating member, and selectively rotating the first and second rotating members to move any of the attachments to the standby position. It is obtained so as to location.

The second rotating member is preferably provided at a plurality of locations on the first rotating member around the rotation axis.

It is preferable that the first driving device for rotating the first rotating member is provided on the hanger side, and the second driving device for rotating and driving the second rotating member is provided on the installation floor side.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention is applied to a transport line for mixing four types of bodies (work), and one embodiment in that case will be described with reference to FIGS.

As shown in FIG. 8, the transport line according to the present invention has a plurality of hangers 1 arranged in a line, and each of the hangers 1 is connected to a supply station A on which a body serving as a work is mounted. A predetermined work, for example, PVC painting (masking, P
VC coating, masking peeling, etc.). The hanger 1 carried out of the work station B has its body removed at the unloading station C, is transferred to the storage line D, and stands by. A switching station E is provided with a switching device 2 for switching the attachment according to the type of vehicle body supplied at the supply station A.

FIG. 1 is a side view of the hanger 1 reaching the switching station E. As shown in the drawing, the hanger 1 forms a rectangular frame with a vertically extending vertical frame member 1a and a horizontally extending horizontal frame member 1b, and disposes the rectangular frame in the vehicle width direction. The connecting members (1c: see FIG. 7) are formed so as to be substantially U-shaped when viewed from the front. The hanger 1 is guided in a linear direction by a guide mechanism 3 including a guide rail 3a on the installation floor f side and a guide roller 3b on the hanger 1 side, and is also moved in a direction indicated by an arrow in FIG. Transferred from right to left).

A first rotating member 4 is attached to the lower end of each vertical frame member 1a of the hanger 1 so as to be rotatable on a horizontal plane. The first rotating member 4 is configured by arranging a pair of hollow prism-shaped rotating arms 4a and 4b at 180 ° opposed positions. Both rotary arms 4a, 4b have their inner diameter ends connected to a vertical drive shaft (not shown) passing through the inner space of the vertical frame member 1a. The drive shaft is driven to rotate by a first drive device 10 such as a servomotor disposed at a joint between the upper end of the vertical frame member 1a and the upper horizontal frame member 1b. When driving the first driving device 10, the driving force is transmitted through the drive shaft, both rotating arms 4a, 4b are integrally rotated in a horizontal plane around the axis O ₁ of the drive shaft.

[0013] plurality of positions of the axis O ₁ around the first rotating member 4, for example, two rotary arms 4a, the radially outer end portion of the 4b, respectively turntable 5a, 5b (second rotary member) is disposed. As shown in FIG. 2, the rotary tables 5a and 5b
5a is an L-shaped plate, and 5b is a rectangular plate. The width W is smaller than the width of the rotating arms 4a and 4b in order to prevent the shadowed area from being enlarged during PVC coating. Is done. At each end of each of the rotary tables 5a and 5b, four types of attachments 6 formed corresponding to the shape of the bottom surface of the vehicle body are mounted.

[0014] FIG. 4 shows the other rotary table in FIG.
It is sectional drawing which shows the support part of 5b. As shown,
The cable 5b is formed by laminating and screwing the upper plate 5b1 and the lower plate 5b2.
On the shaft member 11 which is configured to be stopped and is rotatably supported
The end is fixed via a ring-shaped inner diameter plate 5b3. axis
At the lower end of the member 11, a prism driven by the switching device 2
Switching block 12 is mounted, and the positioning
Is mounted. The positioning cam 13 is a rotating arm
2 and engages with the claw member 14 fixed to the 4b side every half rotation.
The rotary table 5b overlaps with the rotary arm 4b as shown in
Position the shaft member 11 and the rotary table 5b
Hold. On the upper surface of the rotating arm 4b, a suitable friction reduction unit
A material 15 is adhered, and the friction reducing member 15
Friction between the upper surface 15a of the rotary table and the lower surface of the rotary table 5b
It is reduced. As a bearing 16 that supports the shaft member 11
From the viewpoint of preventing deformation and wear of the shaft member 11, such as a ball bearing.
Instead of rolling bearings, cylindrical sliding bearings (oilless bearings)
And the like.

[0015] From the above configuration, is rotated to switch blocks 12 in the switching device 2 as described later, the rotary table 5b is rotated on a horizontal plane around the axis O ₂ of the shaft member 11, the rotary table 5b Can be alternately transferred to the 180 ° facing position.

[0016] The structure of the support portion is also the rotation table 5a of the L-shaped function is similar to that shown in FIG. 4, the rotary table 5a on the rotating arm 4a around the axis O ₂ in the vertical direction Can rotate.

As shown in FIG. 1, the switching device 2 is provided on each of the turntables 5a of the hanger 1 on the installation floor f of the switching station E and stopped at the switching station E.
It is arranged just below 5b. Although illustration is omitted,
On the opposite side in the vehicle width direction, four switching devices are arranged immediately below the rotary table as in FIG.

The switching device 2 includes a rotary drive unit 2a for rotating the support block 12, and an elevating unit for raising and lowering the rotary drive unit 2a.
2b.

FIG. 3 shows an example of the configuration of the rotation drive unit 2a. The rotation drive unit 2a includes a pair of rollers 21 arranged on both sides on the short side of the switching block 12, a rotation plate 22 supporting both rollers 21, and a drive unit 23 for driving the rotation plate 22. You.
For example, as shown in FIG. 5, the driving unit 23 includes a first gear 24 fixed to a rotating shaft 22a of the rotating plate 22, a second gear 25 meshing with the first gear 24, and a base end rotatable by a fixed member 26. And a link member 28 having one end rotatably connected to a cylinder rod 27a of the cylinder 27 and the other end fixed to a support shaft 25a fixed to the second gear 25. .
If the cylinder 27 is advanced and retracted, the rotating plate 22 will be 180 °
The two rollers 21 press the side surfaces of the switching block 12 in response to the forward and backward directions.
Can be rotated by 180 ° in the forward and reverse directions.

The elevating section 2b is composed of, for example, a cylinder 29 (see FIG. 1).

Hereinafter, an operation procedure of the transport line according to the present invention will be described.

The hanger 1 is transported to the switching station E (see FIG. 8) with the longitudinal directions of the rotating arms 4a and 4b being parallel to the transport direction as shown in FIG. At this time, the cylinder 29 is retracted and the rotation driving unit 2a is lowered so that the rotation driving unit 2a of the switching device 2 does not interfere with the members (the switching block 12 and the like) on the hanger 1 side.

Next, when the hanger 1 stops at the specified position, the lifting / lowering unit 2b is started to raise the rotary drive unit 2a, and the rollers 21 are arranged on both sides of the switching block 12, and the vehicle body supplied to the supply station A is supplied. Attachment 6 according to type
Is switched. That is, according to the vehicle type data signal from the supply station A, the rotation drive unit 2a of one of the two switching devices 2 is activated for each of the first rotating members 4. Attachment corresponding to the body type (hereinafter referred to as “attachment”) by rotating one turntable (5a or 5b) by 180 °
When the first rotating member 4 rotates, a portion that is on the outer diameter side, that is, the corresponding attachment is the rotary table 5b on the transport direction side
When the corresponding attachment is on the opposite side (reverse direction of the transport direction) of the rotary table 5a, it is disposed on the reverse side of the transport direction when it is on the upper side. Thereafter, the cylinder 29 is retracted to lower the rotation drive unit 2a, and the hanger 1 is transferred to the supply station A. In addition, corresponding attachment 6
Is located at the specified position from the beginning, it is transferred to the supply station A without activating the rotation drive unit 2a.

At the supply station A, the vehicle body is lifted up before the hanger 1 arrives, and its bottom surface is located above the first rotating member 4. When the hanger 1 is transferred, the first driving device 10 is activated to
7, the attachment 6 'located at the specified position is arranged at the standby position, that is, at the center in the vehicle width direction, as shown in FIG. The case where it is on the rotary table 5a on the side is illustrated). Thereafter, the vehicle body 30 is lowered (or the hanger 1 is raised), and the bottom portion is supported by the four attachments 6 ′, and the hanger 1 is transported to the work station B.

By the way, in the above configuration, in order to prevent collision and interference between the roller 21 and the switching block 12 when the rotation drive unit 2a of the switching device 2 is raised, as shown in FIG. Some gap t between
Need to be secured. However, if the gap t is too large, the binding force of the switching block 12 by the roller 21 decreases,
It becomes difficult to ensure the positioning accuracy of the turntables 5a, 5b. Therefore, in this case, as shown in FIG. 6, two rollers 21 are provided on both sides of the switching block 12 (for a total of 4 rollers).
It is good to arrange. With this structure, even if the gap t is the same, the rotation angle θ ₂ allowed between the roller 21 and the switching block 21 becomes smaller than the rotation angle θ _{1 in} the case of FIG. On the other hand, the allowable rotation angle can be reduced, and both stability and reliability of operation and positioning accuracy can be achieved.

As described above, the transport line according to the present invention has a structure in which the rotating arms 4a and 4b are provided with the independently rotatable rotating tables 5a and 5b, and the two are selectively driven to rotate. Therefore, even when four types of vehicle bodies are mixed on the same transport line, it is possible to quickly switch to the attachment 6 corresponding to the type of vehicle body, and the mixed flow can be realized. In addition, since the number of the rotating arms 4a and 4b does not increase with an increase in the number of attachments, formation of a new shadow in a later painting process can be suppressed, and workability during painting can be maintained. .

The above description is for the case where four types of vehicle bodies are mixed, but if the attachment 6 and the turntables 5a and 5b are additionally provided, it is possible to easily cope with five or more types of mixed flows. Further, if one of the rotary tables 5a and 5b is omitted and the attachment 6 is directly attached to the rotary arms 4a and 4b, it is possible to cope with a case where three types of works are mixed.

[0028]

According to the present invention, according to the present invention, three
It is possible to mix more than two types of works. In addition, since an unused attachment or the like can be arranged at a position where it does not interfere with the work at the work station, there is no hindrance to the work.

[Brief description of the drawings]

FIG. 1 is a side view showing a transport line according to the present invention, showing a hanger reaching a switching station.

FIG. 2 is a perspective view showing a structure near a lower end of the hanger.

FIG. 3 is a perspective view showing a second driving device (switching device).

FIG. 4 is a longitudinal sectional view of a first rotating member.

FIG. 5 is a plan view showing a schematic structure of a rotation drive unit.

FIG. 6 is a plan view showing another embodiment of the rotation drive unit.

FIG. 7 is a front view showing the hanger reaching the supply station.

FIG. 8 is a plan view showing a schematic overall structure of a transport line according to the present invention.

FIG. 9 is a perspective view showing a conventional hanger and a vehicle body supported by the hanger.

FIG. 10 is a perspective view of a conventional hanger.

[Explanation of symbols]

Reference Signs List 1 hanger 2 second driving device 4 first rotating member 5a / 5b second rotating member (rotary table) 6 attachment 10 first driving device 30 work (body) A work station f installation floor O ₁ first Rotation axis of rotating member O ₂ Rotation axis of second rotating member

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hiroyuki Yoshida 2-5-25-204 Yamatedai, Ibaraki-shi, Osaka

Claims (3)

[Claims] 1. A transport line that has a plurality of hangers that support an associated work by engaging an attachment with the work, and sequentially feeds each hanger to a work station that performs a predetermined operation on the work while the work is mounted. The attachment is formed in a shape corresponding to each type of work, and before the work is supplied to the hanger, any one of the attachments is selected and the attachment corresponds to the supply position of the work. A first rotating member is rotatably provided on the hanger, a second rotating member is rotatably provided on the first rotating member, and a plurality of attachments are provided on the second rotating member. And selectively rotate the first and second rotating members to place any of the attachments at the standby position. Transport line was. 2. The transport line according to claim 1, wherein the second rotating member is provided at a plurality of positions of the first rotating member around the rotation axis. 3. A device according to claim 1, wherein a first drive for rotating the first rotary member is provided on the hanger side, and a second drive for rotating the second rotary member is provided on the installation floor side. Or the transfer line according to 2.