JP2000016285A - Conveyor chain for conveying truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a truck-conveying conveyor chain that is structurally simple and capable of preventing fluctuation of the conveying speed of a truck during conveyance while allowing a truck to be easily conveyed in and out. SOLUTION: A conveyor chain for conveying a truck is formed into an endless shape consisting of a number of links 11 freely bendably connected together by horizontal connecting shafts 10 and guide rollers 12 guided and supported on guide rails are mounted on the portions of links of the connecting shafts projecting to both right and left sides. A wheel support member 16 is provided on the outer peripheral side of each of the links arranged in the endless shape, and approximately V-shaped wheel retaining recess portions 16A in which the running wheels 2A of a truck are fitted and retained are formed in some of the wheel support members 16. The wheel support members constitute a part of a rail on which the running wheels arranged in a line along a conveying direction, with the links linearly extended, can run.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor chain used for transporting a truck having traveling wheels running on rails, and more particularly to a conveyor chain suitable for transporting a truck in a painting booth.

[0002]

2. Description of the Related Art Conventionally, in a painting booth for an automobile body or the like, a work is generally placed on a carriage, and the work is painted while the carriage is pulled and conveyed by a conveyor. As such a conveyor for transporting a trolley, there is, for example, one described in Japanese Utility Model Publication No. 61-947, which runs on rail A1 at four front, rear, left and right positions as shown in FIG. Cart A provided with traveling wheels A2
3 is mounted with a work W such as an automobile body to be painted, and the driven member A4 provided on the cart A3 is moved to a pusher provided on a conveyor chain A6 of a conveyor A5 installed below the floor of the painting booth. The cart A3 is conveyed by pushing with A7, and the work W is painted on the way.

[0003]

In the conveyor as described above, when a driven member provided on the truck is pushed by a pusher attached to the conveyor chain, pulsation occurs in the speed of the conveyor chain. If the running resistance of the truck fluctuates, the pusher and the driven member come into contact with or separate from each other, so that the transport speed of the bogie greatly varies, and the variation in the transport speed causes uneven painting of the workpiece.

For this reason, in such a conveyor, a retainer for preventing the driven member from moving forward from the pusher is generally attached to the front of the pusher of the conveyor chain so as to be swingable about a support shaft, and the driven member is connected to the pusher and the retainer. And transport it while holding it.

However, the distance between the pusher and the retainer is slightly larger than the front-rear width of the driven member so that the pusher and the retainer can be turned upside down. The rattling of the member cannot be completely removed.

Therefore, as seen in Japanese Utility Model Publication No. 1-20327, the shape of the surface of the retainer that is in contact with the driven member is formed by an arc having a center at the lower portion of the support shaft in the vertical direction, and the driven member is driven. There has also been proposed a technique for preventing a member from rattling during conveyance between a pusher and a retainer, thereby preventing uneven conveyance speed of a truck as much as possible.

[0007] However, in the case of a conveyor having a structure in which the driven member is sandwiched between a pusher and a retainer attached to the conveyor chain as described above and conveyed, a guide member or the like is provided at a position where the carriage is carried out of the conveyor. It was necessary to lay down the retainer and release the driven member.

Further, since the pusher and the retainer attached to the conveyor chain are exposed on the floor of the painting booth, the paint scattered at the time of painting the work attaches the pusher and the retainer to the conveyor chain so as to swing freely. If the dust falls and adheres to the shaft portion, and further dust or the like accumulates on the shaft portion, the pusher or the retainer cannot be raised and lowered smoothly, and there is a possibility that the conveyance of the carriage may be hindered.

Accordingly, the present invention solves the above-mentioned problems of the prior art, and has a simple structure, can prevent fluctuations in the transport speed of the truck during transportation, and can easily carry the truck in and out. The purpose is to provide a conveyor chain for use.

[0010]

In order to achieve the above object, a truck conveyor conveyor chain according to the present invention comprises a plurality of links whose longitudinal ends are flexibly connected in a vertical plane by horizontal connecting shafts. Guide rollers, which are guided and supported by guide rails, are attached to portions projecting to the left and right sides from the links of the respective connection shafts, and the running wheels of the bogie are provided on the outer peripheral side of each link in an endless knitted state Are provided, and each wheel support member constitutes a part of a rail on which traveling wheels can run in a line in the transport direction in a state where the links connected to each other are linearly extended. At the same time, some of the wheel support members are formed with a substantially V-shaped wheel holding recess for inwardly holding the traveling wheel of the bogie in the transport direction.

[0011]

The wheel support members provided on each link constituting the conveyor chain are arranged in a line in the conveying direction on the upper traveling path of the conveyor chain to form a rail on which the traveling wheels of the bogie can travel. The traveling wheels of the truck can be transferred onto these wheel support members from the upstream end side in the transport direction of the conveyor chain.

Then, the traveling wheel is pushed to a part of the wheel supporting members by pushing the bogie forward with a pushing mechanism such as a human power or a pusher on a rail constituted by a row of wheel supporting members. It is recessed into the formed substantially V-shaped wheel holding recess.

[0013] Then, the traveling wheel is positioned between the substantially V-shaped inclined surfaces before and after the wheel holding recess to restrict movement in the front-rear direction with respect to the conveyor chain, and the carriage is conveyed by driving the conveyor chain.

The truck conveyed to the downstream end of the upper traveling path of the conveyor chain is forcedly pushed forward in the conveying direction by a pushing mechanism such as human power or a pusher, so that the traveling wheel escapes from the wheel holding recess to the front. Out of the conveyor chain.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a conveyor for transporting a trolley on which a workpiece is mounted in a painting booth for performing electrostatic coating on a workpiece such as a body of an automobile, showing an embodiment of a trolley transport conveyor chain of the present invention. FIG. 2 is a plan view of the conveyor as viewed from above the floor.

As shown in FIG. 1, the conveyor 1 is installed between the floor F and the upper surface of the beam G in a state where a part thereof is exposed on the floor F of the painting booth. A trolley 2 on which a work (not shown) is mounted is conveyed in a painting booth, and the work on the trolley 2 is subjected to electrostatic coating on the way.

The beam G crosses the upper part of the pit extending below the floor surface F in the direction of conveyance of the conveyor 1,
The pits are provided at predetermined intervals in the longitudinal direction.

The conveyor 1 has a rail support frame 4 on which a rail 3 for guiding and supporting a traveling wheel 2A of a bogie 2 is fixed at an upper end.
And the carriage drive unit 5. The rail support frame 4 and the carriage drive unit 5 are integrally connected by a connection frame 6 arranged at predetermined intervals in the conveying direction of the conveyor 1.

An air conditioning air flow path D through which air sucked by an air conditioner (not shown) passes is formed between the floor F of the painting booth and the bottom face G of the pit, and supports the rail 3. A suction port M through which air flows from the booth into the air-conditioning air flow path D is formed between the rail support frame 4 and the bogie drive unit 5.

The suction port M is covered with a well-permeable porcelain plate P supported on a connecting frame 6, and the cart 2 moves through the grid-shaped eyes of the porcelain plate P in the air conditioner. An air flow a from the inside of the booth to the floor surface F is constantly generated, and fine paint mist and dust floating in the booth are sucked and removed to the air conditioning air flow path D side.

Although not shown, water is always flowing at the bottom of the pit, and paint mist and the like falling from above are washed away with water and removed to prevent the paint mist from adhering and depositing on the bottom of the pit. ing.

On the other hand, the bogie drive unit 5 includes guide rails 7A and 7B which are provided in the transport direction along an upper traveling path A and a lower traveling path B by a driving source (not shown).
Endless carriage conveyor chain (hereinafter simply referred to as a conveyor chain) 8 which is guided and circulated and driven.
have.

The left and right guide rails 7A are separately provided, and are integrally connected and supported by a mounting frame 9 fixed on a beam G provided at predetermined intervals in the longitudinal direction. The left and right guide rails 7B are integrated, and are supported below the guide rails 7A by the mounting frame 9.

In this embodiment, the pair of guide rails 7A on the upper traveling path A side are made of steel so as to withstand a high load because a part of the weight of the bogie 2 is loaded. Since the guide rail 7B on the lower traveling route B side is light in load, the guide rail 7B is made of an aluminum drawing material having a low manufacturing cost.

As shown in FIGS. 3 and 4, the conveyor chain 8 has a large number of links 11 whose both ends in the longitudinal direction are flexibly connected in a vertical plane by a horizontal connection shaft 10.
From endless.

A guide roller 12 having a flange 12A is attached to a portion of each connecting shaft 10 projecting from the link 11 to both left and right sides. These guide rollers 12 are rotatably mounted on shaft ends on both sides of the connecting shaft 10 via bearings (not shown), and the roller running surfaces S, 7B of the guide rails 7A and 7B shown in FIG. S 'supports each other.

The flange 12A of the guide roller 12
Are guided to the edges of the roller running surfaces S and S 'on the opposite side, thereby preventing the conveyor chain 8 from meandering.

As shown in FIGS. 5 and 6, each link 11 of the conveyor chain 8 has a pair of left and right plate portions 11A integrally joined by a leg portion 11B. 11 plate part 11
The front ends of the left and right plate portions 11A forming one link 11 are inserted into the inside of the rear ends of the left and right plate portions 11A forming the other link 11, and the outside and the inside are inserted. Links 11 before and after overlapping
The chain roller 13 is rotatably supported around the connection shaft 10 between the pair of plate portions 11A inserted through the connection shaft 10 between the plate portions 11A.

The chain roller 13 has a driving sprocket rotated by a driving source (not shown) provided at one end in the longitudinal direction of the carriage driving unit 5 in FIG. 1 and a rotating sprocket at the other end. The driven side sprockets are freely meshed with each other, and the conveyor chain 8 is driven to run by the rotation of the driven side sprockets.

On the other hand, as shown in FIG. 1, a shield formed by a pair of aluminum pull-out members opposing each other so as to protrude toward the center from both right and left positions adjacent to the upper traveling path A of the conveyor chain 8 and approach. A member 14 is provided.

The lower surfaces of these shielding members 14 are respectively
The guide rails are fixed to the upper end surface of the mounting frame 9, and the guide rails are provided on the lower surfaces of the shielding members 14 at positions vertically opposed to the roller running surfaces S formed on the upper surfaces of the left and right guide rails 7 </ b> A. 14A is integrally formed so as to protrude, and the guide roller 12 is sandwiched between the guide rail 7A and the lift of the conveyor chain 8 during running is suppressed.

Above these shielding members 14, there are formed trough-shaped water passages 14B which are continuous in the direction of conveyance of the conveyor chain 8. The water channel 14B is always filled with clean water flowing from one end in the longitudinal direction of the conveyor to the other end.

As shown in FIGS. 3, 5 and 6, the legs 11B of the respective links 11 of the conveyor chain 8
Project upward from a gap between the pair of shielding members 14, and a shielding plate 15
Are provided integrally.

The shielding plate 15 extends to the left and right sides of the leg 11B above the gap, and the left and right shielding members 14
Is bent downward to a position where it is submerged in the water channel 14B, and is formed in an eave shape so as to partially overlap between the adjacent links 11.

In the upper traveling path A (see FIG. 1), the upper surfaces of the shielding plates 15 of the respective links 11 of the conveyor chain 8, that is, the shielding plates 15 of the links 11 in a state of being knitted endlessly. A wheel support member 16 for supporting the traveling wheel 2A of the bogie 2 is integrally provided on the outer peripheral surface.

[0036] These wheel supporting members 16 are rails that support the traveling wheels 2A so as to be able to travel in a line in the transport direction on the upper traveling path A in which the links 11 connected to each other extend linearly and travel. To form a part of.

Further, among these wheel support members 16,
The wheel support members 16 of some of the links 11 have substantially V-shaped wheel holding recesses 16 for inwardly holding the traveling wheels 2A of the bogie 2.
A is formed, so that the traveling wheel 2A of the bogie 2 can be rolled on another wheel supporting member 16 arranged in the front-rear direction so as to be recessed into the wheel holding recess 16A. Note that the wheel holding recess 16 </ b> A is formed in the wheel support member 16 at a position corresponding to the wheels 2 before and after the bogie 2.

On the other hand, as shown in FIG. 1, a pair of vertical wall plates 17 are provided upright on the upper surface of the rail support frame 4 in parallel with both sides of the rail 3 fixed thereto. In the same way as the water channel 14B of the shielding member 14 described above,
Clean water is constantly flowing from one end of the conveyor 1 in the longitudinal direction to the other end, and the upper surface of the rail 3 is always immersed below the water surface.

With this structure, the traveling wheel 2A of the truck 2
The outer periphery of the rail always runs on rail 3 while immersed in water,
The electric ground of the cart 2 for electrostatic painting can be reliably secured, and paint mist scattered during painting due to water flowing between the pair of vertical wall plates 17 can be prevented from adhering to the rail 3. .

Next, the operation of transporting the carriage 2 by the conveyor 1 using the conveyor chain 8 of the present invention will be described. FIG.
As shown in FIG. 3, the front and rear traveling wheels 2A on one side in the width direction of the bogie 2 at the loading end of the conveyor 1 are exposed on the floor surface F to constitute a rail parallel to the rail 3. , And the front and rear traveling wheels 2A on the other side are supported by the rail 3, and human power is applied until the one side traveling wheel 2A falls into the wheel holding recess 16A of the wheel supporting member 16 (see FIG. 3). Alternatively, the bogie 2 is moved by being pushed by a pusher mechanism or the like installed on the floor.

Conveyor chain 8 of carriage drive unit 5
Is driven by a drive source (not shown), and when the traveling wheel 2A indented and held in the wheel holding recess 16A of the wheel supporting member 16 moves forward, the opposite traveling wheel 3 supported on the rail 3 The trolley rolls on the rail and moves, and the trolley 2 on which the work is placed is transported in the painting booth.

While the carriage 2 is being conveyed by the conveyor 1, the work mounted thereon is subjected to necessary coating. At this time, fine paint mist and dust floating in the air in the coating booth pass through an air inlet M formed between the truck drive unit 5 of the conveyor 1 and the rail support frame 4 to cause the paint under the floor F to pass. It is removed by the air flow a flowing to the air conditioning air flow path D.

On the other hand, paint mist and dust descending from above the carriage driving unit 5 are shielded between the shielding plates 15 on the upper and lower sides of the conveyor chain 8 and the shielding members 14 on the left and right sides opposed thereto. Is sealed by the water filled in the water channel 14B, and the shielding plates 15 are configured to overlap each other between the links 11 adjacent in the transport direction with a narrow gap.
Intrusion below the shielding member 14 is prevented. Also, falling objects such as paint mist that has fallen into the water channel 14B are removed by being washed away by the water flowing therethrough.

The carriage 2 conveyed to the downstream end of the upper traveling path A of the conveyor chain is forcibly pushed forward in the conveying direction by a pushing mechanism such as a human power or a pusher, so that the traveling wheel 2A is held in the wheel holding recess. 16A
From the conveyor chain 8.

Although not shown, rails similar to the rails 3 are continuously laid from the end of the upper traveling path A of the conveyor chain 8, and the bogie 2 sent out from the conveyor 1 uses these rails. And is driven by another pusher conveyor or the like and sent from the painting booth to the next process.

In the above-described embodiment, a pair of left and right guide rails 7A and a pair of left and right guide rails 7A are used to guide the guide rollers 12 of the conveyor chain 8 along the upper traveling path A which is the conveying side of the conveyor chain 8. The guide rails 14A formed integrally with the lower surfaces of the pair of shielding members 14 are used.
A may be provided separately from the shielding member 14, and furthermore, an integrated member of the guide rail 7 </ b> A and the guide rail 14 </ b> A may be used.

In this embodiment, the traveling wheels 2A arranged in front and behind one side in the width direction of the bogie 2 are propelled by the conveyor chain 8 of the bogie driving unit 5, and the other traveling wheels 2A are railed. The carriage 2 is conveyed while being supported by the carriage 2. However, the carriage drive units 5 are arranged in parallel to drive the two sets of conveyor chains 8 synchronously.
Traveling wheels 2A on both sides of the conveyor chain 8
It is also possible to use it such that it is transported by placing it on

Further, a three-wheeled vehicle in which one traveling wheel is provided at the center in the width direction of one of the front and rear sides of the bogie, and two traveling wheels are provided on both sides in the width direction of the bogie so as to be spaced apart from this traveling wheel. In the case of using a bogie, the 2
The two traveling wheels can be supported on rails, respectively, and the central wheel can be transported on a truck drive unit.

The conveyor chain for transporting a trolley of the present invention is not limited to use in a painting booth, but can be used in various applications as long as it transports a trolley having running wheels running on rails. It is.

[0050]

As described above, according to the truck conveyor belt of the present invention, the traveling wheels of the truck fall into the substantially V-shaped wheel holding recesses formed in some of the wheel support members. To be positioned and held in a state where the movement in the front-rear direction with respect to the conveyor chain is restricted between the substantially V-shaped inclined surfaces before and after the wheel holding concave portion, so that the bogie is towed and conveyed via the traveling wheels. Therefore, there is no rattling of the truck with respect to the conveyor chain, and there is no fluctuation in the transport speed of the truck due to the rattling.

As a result, in particular, when painting the work while transporting the trolley on which the work is mounted in the painting booth, it is possible to prevent uneven coating due to fluctuations in the transport speed of the trolley. Quality can be improved.

Further, unlike the conventional conveyor chain for transporting a truck, the truck can be transported without using a pusher or a retainer, so that the structure of the conveyor chain is simplified and the manufacturing cost can be reduced.

In particular, when used in a painting booth, in the conventional truck conveyor belt, paint scattered at the time of painting the work falls and adheres to the support shaft portion of the pusher or the retainer, and furthermore, dust or the like is further thereon. If the pile is accumulated, there is a possibility that these standing and falling operations may be defective.However, in the truck conveyor belt of the present invention, the traveling wheels of the truck are recessed into the wheel holding recesses and are held. There is no such danger, and furthermore, the traveling wheels of the bogie are rolled on the wheel supporting members, which are arranged in a line in the transport direction, each constituting a part of the rail, so that the wheel is indented into the wheel holding recess from the transport direction. It can be released freely and, like the conventional conveyor chain for carriage transportation, releases the engaged member of the carriage from the retainer. Member or the like can be easily performed loading and unloading of the truck without having to place.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a conveyor used in a painting booth, showing one embodiment of a truck conveyor belt of the present invention.

FIG. 2 is a plan view of a conveyor used in a painting booth, showing one embodiment of the truck chain for transporting a truck according to the present invention.

FIG. 3 is a side view of the conveyor chain of the present invention.

FIG. 4 is a plan view of the conveyor chain of the present invention.

FIG. 5 is a sectional view taken along the line AA of FIG. 3 and viewed in the direction of the arrow;

FIG. 6 is a sectional view taken along the line BB in FIG.

FIG. 7 is a view showing an example of a conventional truck conveyor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Conveyor 2 Bogie 2A Running wheel 3 Rail 4 Rail support frame 5 Bogie drive unit 6 Connecting frame 7A, 7B Guide rail 8 Conveyor chain 9 Mounting frame 10 Connecting shaft 11 Link 11A Plate part 11B Leg part 12 Guide roller 12A Flange part 13 Chain Roller 14 Shielding member 14A Guide rail 14B Water channel 15 Shielding plate 16 Wheel support member 16A Wheel holding recess 17 Vertical wall plate

Claims (1)

[Claims] An end portion in a longitudinal direction has a plurality of links connected to each other by a horizontal connecting shaft so as to be freely bent in a vertical plane, and a portion protruding left and right sides from the link of each connecting shaft to a guide rail. A guide roller to be guided and supported is attached, and a wheel supporting member for supporting a traveling wheel of a bogie is provided on an outer peripheral side of each link in a state where it is knitted endlessly, and each wheel supporting member is connected to each other. In a state where the links are linearly extended, they form a part of a rail on which the traveling wheels can travel in a line in the transport direction, and some of the wheel support members fall off the traveling wheels of the bogie from the transport direction. A conveyor chain for transporting a bogie, wherein a substantially V-shaped wheel holding concave portion for freely indenting and holding is formed.