JP4235765B2 - Trolley conveyor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a trolley conveyor used in a vehicle body painting process in an automobile assembly factory, for example.
[0002]
[Prior art]
Conventionally, as this type of conveyor, the power rail is arranged in parallel over the required section of the free rail, the carrier is passed to a plurality of free trolleys that run on the free rail, and runs on the power rail. A drive chain is stretched over a plurality of power trolleys, a dog is provided on the leading free trolley, and a pusher is provided on the drive chain so that the dog can be engaged and disengaged freely. There is known a structure in which a friction bar is integrally provided, and a driving roller is disposed so as to be frictionally engaged with the friction bar (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-8-324423 [0004]
[Problems to be solved by the invention]
For example, when the conveyor is installed in a vehicle body painting process, paint or water adheres to the friction bar. If it does so, a drive roller will slip and it will become impossible to give a thrust to a friction bar. Therefore, the installation environment of the conveyor is limited.
[0005]
An object of the present invention is to provide a conveyor that can be used in any work process without being restricted by the installation environment.
[0006]
[Means for Solving the Problems]
A conveyor according to the present invention is provided in a carrier having a plurality of free trolleys that run on a free rail, a plurality of power trolleys that run on a power rail, and a friction bar that is passed to them. A dog, a pusher provided on the rolling member and detachably engaged with the dog, and a drive roller disposed so as to be frictionally engaged with the friction bar.
[0007]
In the conveyor according to the present invention, the carrier and the friction bar can be disengaged. When paint or water adheres to the friction bar, the friction bar can be disengaged from the carrier, and another friction bar to which no paint or water is attached can be engaged with the carrier. Therefore, it can be used for any work process without being restricted by the installation environment.
[0008]
Another trolley conveyor according to the present invention includes a free rail, first and second power rails arranged so as to extend in parallel along the free rail, and a carrier having a plurality of free trolleys running on the free rail. A first moving body having a plurality of power trolleys traveling on the first power rail and a friction bar passed to them, and a plurality of power trolleys traveling on the second power rail, A second moving body having a drive chain, a dog provided on the carrier, a first pusher provided on the first moving body and detachably engaged with the dog, and provided on the second moving body. And a second pusher that is detachably engaged with the dog, and a drive roller that is disposed so as to be frictionally engaged with the friction bar. It is.
[0009]
In another trolley conveyor according to the present invention, in a process in which paint or water may adhere to the carrier, the carrier is surely pulled by the drive chain, and there is a risk that paint or water may adhere to the carrier before or after the process. In the absence stroke, the carrier can be driven quietly by the friction bar and the driving roller, and of course, it can be used for any work stroke without being restricted by the installation environment.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
In the following description, front and rear refer to FIG. 1 as a reference and the left side refers to the front and the opposite side refers to the rear, and the left and right refers to the left and right sides as viewed from the rear.
[0012]
Referring to FIG. 1, on the left side of a rectangular electrodeposition tank E that is long in the front-rear direction, a carry-in station S1 and a carry-out station S2 are provided in the front-rear direction with a larger interval than the length of the electrodeposition tank E.
[0013]
A rectangular endless free line 11 that is long in the front-rear direction is provided so as to return from the loading station S1 to the loading station S1 sequentially through the electrodeposition tank E and the unloading station S2. The free line 11 includes a rightward path 11a, a forward path 11b, a leftward path 11c, and a rearward path 11d that are sequentially formed.
[0014]
The free line 11 is divided into the following four first to fourth sections 21 to 24 separately from the paths 11a to 11d. The first section 21 includes a portion near the rear end of the backward path 11d, the entire right path 11a, and a portion near the rear end of the forward path 11b. The second section 22 is composed of the central portion of the forward path 11b. The third section 23 includes a portion near the front end of the forward path 11b, the entire left path 11c, and a portion near the front end of the rear path 11d. The fourth section 24 includes a central portion of the backward path 11d. In these four sections 21 to 24, four endless first to fourth power lines 31 to 34 are sequentially arranged so that parts of the respective required paths are parallel to each other.
[0015]
There is a first branch / merging section 41 across the boundary between the first section 21 and the second section 22, and there is a second branch / merging section 42 across the boundary between the second section 22 and the third section 23, There is a third branch / merging section 43 across the boundary between the third section 23 and the fourth section, and a fourth branch / merging section 44 across the boundary between the fourth section and the first section 21.
[0016]
As shown in detail in FIG. 2, in the first branching / merging portion 41, the first power line 31 is branched from the first section 21 of the free line 11, and the second power line 32 is the second section 22 of the free line 11. Has been joined. The second to fourth branch / merging portions 42 to 44 are not described in detail, but corresponding ones of the first to fourth power lines 31 to 34 are branched / merged with respect to the free line 11. .
[0017]
The free line 11 is shown in FIGS. 3 and 4 show the first power line 31 together with the free line 11, and FIGS. 5 and 6 show the second power line 32 together with the free line 11.
[0018]
The free line 11 includes a free rail 51 and a carrier 52 that is moved along the free rail 51.
[0019]
As shown in detail in FIGS. 4 and 6, the free rail 51 is composed of a pair of transverse U-shaped rail members 51 a facing the openings.
[0020]
The carrier 52 is divided into three first to third free trolleys 61 to 63, and a first free trolley 61 and a second free trolley 62 which are placed on the free rail 51 in order in the traveling direction. Further, the connecting rod 64 that is passed so as to freely swing in the horizontal direction, and the second free trolley 62 and the third free trolley 63 so as to freely swing in the vertical and horizontal directions. It consists of the hanger 65 being passed.
[0021]
The first free trolley 61 shown in FIG. 4 includes a pair of left and right front and rear traveling rollers 71 placed on the lower flanges of both rail members 51a, and front and rear guide rollers 72 sandwiched between the lower flanges. And have. A dog 73 is provided on the top of the first free trolley 61. The second and third free trolleys 63 have the same structure as the first free trolley 61.
[0022]
The hanger 65 has a ceiling frame 81 and an arm 82 that is suspended from the ceiling frame 81 and on which the vehicle body W is placed.
[0023]
The first power line 31 includes a first power rail 91, a first moving body 92 moved along the first power rail 91, and is arranged along the first power rail 91 and frictionally engaged with the first moving body 92. It consists of a plurality of first feeders 93 that send this.
[0024]
As shown in FIG. 4, the first power rail 91 includes a first rail member 94 having an I-shaped cross section.
[0025]
The first moving body 92 includes four first to fourth power trolleys 101 to 104 placed on the first power rail 91 in order in the traveling direction, and adjacent ones of these power trolleys 101 to 104. And three first to third friction bars 111 to 113 respectively.
[0026]
The second power trolley 102 shown in FIG. 4 has left and right traveling rollers 121 mounted on the lower flange of the rail member 94, and is positioned before and after the traveling roller 121 and sandwiches the lower flange. A pair of front and rear guide rollers 122 are provided. The first, third, and fourth power trolleys 101, 103, 104 have the same structure as the second power trolley 102, but the bottom of the third power trolley 103 is engaged with the dog 73 so as to be freely disengaged. A first pusher 131 is provided.
[0027]
The first feeding device 93 includes a feeding roller 141 disposed so as to be brought into contact with one side surface of the first moving body 92 and a motor 142 having an output shaft to which the feeding roller 141 is attached. The motor 142 is supported by a means (not shown) so as to be swingable horizontally, and is urged so that the feed roller 141 is pressed against the first moving body 92. The arrangement pitch of the first feeding device 93 is slightly shorter than the entire length of the first moving body 92.
[0028]
As shown in FIG. 5, the second power line 32 includes a second power rail 151 and a second moving body 152 that is moved along the second power rail 151.
[0029]
As shown in FIG. 6, the second power rail 151 includes a second rail member 153 having the same cross section as the first rail member 94.
[0030]
The second moving body 152 includes two power trolleys 161 mounted on the second power rail 151 at intervals in the front-rear direction, and a drive chain 162 stretched so as to be suspended from the power trolley 161. And more.
[0031]
The power trolley 161 of the second power line 32 has left and right traveling rollers 163 that travel on the lower flange of the second rail member 153.
[0032]
A second pusher 164 is attached to the drive chain 162 so as to hang down from between the two power trolleys 161. The second pusher 164 performs the same function as the first pusher 131.
[0033]
The third and fourth power rails 33 and 34 are shown only in FIG. The third power line 33 is arranged along the third power rail 171, the third moving body 172 moved along the third power rail 171, and frictionally engaged with the third moving body 172. It consists of a plurality of second feeding devices 173 that send this. The fourth power line 34 includes a fourth power rail 174, a fourth moving body 175 moved along the fourth power rail 174, and a friction engagement with the fourth moving body 175 disposed along the fourth power rail 174. And a plurality of third feeding devices 176 for sending them.
[0034]
Although not shown, the third and fourth power rails 33 and 34 are rail members having the same cross section as the first rail member 94. The third and fourth moving bodies 172 and 175 have the same structure as that of the first moving body 92. The second and third feeding devices 173 and 176 have the same structure as the first feeding device 93.
[0035]
The transport operation will be described again with reference to FIG.
[0036]
The vehicle body W before painting is loaded on the carrier 52 at the loading station S1. In the first section 21 of the free line 11, a plurality of carriers 52 are kept in a standby state in a storage state. In the second section 22, the carrier 52 is transported at a constant pitch, and the vehicle body W loaded on the carrier 52 is immersed in the electrodeposition tank E during this time. In the third section 23, the carrier 52 loaded with the painted vehicle body W is kept in a standby state in a storage state. The vehicle body W is unloaded from the carrier 52 at the carry-out station S2. In the fourth section, an empty carrier 52 is kept waiting while being stored.
[0037]
The first moving body 92 is circulated on the first power rail 91, the third moving body 172 is circulated on the third power rail 171, and the fourth moving body 175 is circulated on the fourth power rail 174. .
[0038]
FIG. 2 schematically shows a state in which the first pusher 131 is disengaged from the dog 73 and the second pusher 164 is engaged with the dog 73 in the first branching / merging portion 41.
[0039]
Of the carriers 52 stored in the first section 21, the leading carrier 52 is sent to the first branching / merging unit 41 by the first feeding device 93. As the first pusher 131 approaches the first branching / merging portion 41, the first pusher 131 is sequentially shifted from right above the free rail 51 to the left while being engaged with the dog 73. , The dog 73 is disengaged. On the other hand, the second pusher 164 that has moved together with the drive chain 162 sequentially shifts from the right side of the free rail 51 to the direction immediately above it, and finally engages with the dog 73 that has been previously disengaged. Is done. In this state, the carrier 52 is conveyed at a constant pitch through the second section 22.
[0040]
The conveying operation of the carrier 52 in the third and fourth sections 23 and 24 conforms to the first section 21. Further, the operation of engaging and releasing the pusher with respect to the dog 73 in the second to fourth branch / merging portions 42 to 44 is not described, but conforms to the operation in the first branch / merging portion 41.
[0041]
The above is an example in which the present invention is applied to an overhead conveyor, but the present invention can also be applied to a floor conveyor.
[0042]
【The invention's effect】
According to the present invention, there is provided a conveyor that can be used for any work process without being restricted by the installation environment.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a conveyor according to the present invention.
FIG. 2 is an operation explanatory diagram in a branching / merging portion of the conveyor.
FIG. 3 is a side view of a first section of the conveyor.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a side view of a second section of the conveyor.
6 is a cross-sectional view taken along line VI-VI in FIG.
[Explanation of symbols]
51 Free rail
52 Carrier
61-63 Free Trolley
73 dog
91 Power rail
Article 92
101-104 power trolley
111-113 friction bar
131 Pusher
141 Feed roller

Claims (2)

A carrier 52 having a plurality of free trolleys 61 to 63 traveling on a free rail 51, a plurality of power trolleys 101 to 104 traveling on a power rail 91, and friction bars 111 to 113 passed to them. 92, a dog 73 provided on the carrier 52, a pusher 131 provided on the rolling body 92 and detachably engaged with the dog 73, and disposed so as to be frictionally engaged with the friction bars 111 to 113. A trolley conveyor comprising a drive roller 141 being mounted. A carrier 52 having a free rail 51, first and second power rails 91 and 151 arranged so as to extend in parallel with each other, and a plurality of free trolleys 61 to 63 running on the free rail 51 A first moving body 92 having a plurality of power trolleys 101 to 104 traveling on the first power rail 91 and friction bars 111 to 113 passed to them, and a plurality of traveling trolleys on the second power rail 151 A second moving body 152 having a power trolley 161 and a drive chain 162 stretched between them, a dog 73 provided on the carrier 52, and a first moving body 92 provided on the first moving body 92 and freely engageable and disengageable with the dog 73. The first pusher 131 that engages with the second moving body 152, the second pusher 164 that is detachably engaged with the dog 73, and the friction bars 111 to 113 are disposed so as to be frictionally engaged with each other. The drive that has been Trolley conveyor with and La 141.

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