JPH0349092Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention is suitable for painting lines for large objects that require high-quality coatings, such as automobile bodies, and is especially suitable for the painting line of large objects that require high-quality coatings, such as automobile bodies. The present invention relates to a dust-proof floor conveyor that is suitable when required.

BACKGROUND TECHNOLOGY Conventionally, a cart conveyor for transporting long objects has been disclosed in Japanese Utility Model Application Publication No. 135514/1983.
This uses a U-shaped engagement member that is recessed on one side with respect to the running direction to connect the cart and the carrier that runs under the floor, and an elastic piece is attached to the tip to seal the movement path on the vertical side. A cover plate was installed upright on the floor surface of the bogie to allow the carrier and chain to move smoothly, and also to prevent paint from the painting line and dust from the floor from entering and adhering to the carrier and chain.

However, since the running wheels of trolleys are not coated with any kind of dust-proof coating, paint may adhere to the wheels on the painting line, increasing rotational resistance, or the paint adhering to the wheels may peel off after drying and cause damage to the paint line. There was a problem in that the particles fell in places and became fine particles that flew up, causing a reduction in the quality of the coating.

The conveying device disclosed in Japanese Utility Model Application Publication No. 60-5966 does not have the above-mentioned problems because the load support platform 1 does not have running wheels, but it lacks stability against left and right rocking of the load support platform 1. Not suitable for use with painting robots.

Furthermore, since the load support platform 1 is supported on a trolley that supports the front and rear thereof without being able to move up and down, and runs on the guide rails 6a and 6b by the horizontal wheels 7, the load on the wheels 7 and the guide rails is large. In addition to high wear, if foreign matter gets caught between the horizontal shaft rollers 27, 28 and the guide rail, the conveying device will be overloaded.Furthermore, since the horizontal shaft rollers 27, 28 are not casters, lateral deviation will occur on curves. This may cause uneven wear on the rollers and guide rails. All of these above-mentioned phenomena cause a decrease in positional accuracy with respect to the painting robot.

In addition, when it is necessary to switch the transferred objects from continuous transfer to tact transfer, such as when the transferred objects are painted in the coating robot work zone, the continuous transfer conveyor and tact transfer conveyor should be installed side by side at the switching point. However, in the above embodiment, such parallel arrangement is difficult due to space considerations.

Problems to be solved by the invention The purpose of this invention is to prevent paint from adhering to the wheels of the trolley carrying objects in the paint booth, and to store the trolley within a desired section of the running line. In addition, it is also possible to provide a different type of drive device to ensure accurate running or stopping positions of the trolley relative to the painting robot, and it also solves the above-mentioned problems with the conventional device. To propose a dust-proof type floor conveyor which can accurately hold the front and back positions and is suitable for robot work.

Means to Solve the Problems In this proposal, the lower frame equipped with running wheels and the upper frame carrying objects to be transported are fixed together using a connecting fitting having vertical parts with a narrow width aligned in a line in the running direction. a transporting body having a trolley, a removable engagement device provided at the front of the transporting body with respect to a drive chain in the traveling direction provided below the transporting body, and a releasable engagement device provided at the rear of the transporting body to prevent subsequent transport by approaching the following transporting body. a release piece for releasing the engagement of the body engagement device; a fixed dustproof cover that is long in the traveling direction and has a passage groove of the vertical portion on the upper part and surrounds the upper surface of the lower frame and both sides of the transport body below the lower frame; The gist of the present invention is a dust-proof floor conveyor having a vertical axis guide roller provided on a lower frame and a fixed guide rail in the traveling direction provided with a downward opening into which the vertical axis guide roller is fitted in a fixed dust-proof cover.

There are two types of transporting bodies: one is a stand-alone truck, and the other is one in which a front carrier connection body and a rear carrier connection body are connected, which guide the truck in the running direction.In the latter case, the front carrier connection body The leading carrier of the body is provided with an engagement device for the drive chain, and the trailing carrier of the rear carrier connection body is provided with a release piece for disengaging the engagement device of the trailing transport body.

Function When the transport object is a single trolley, the trolley is selected to be longer than the object to be transported, and if a carrier coupling body is connected to the front and rear of the transport vehicle, the overall length of the transport object can be made longer than the object to be transported, so the trolley is selected to be longer than the object to be transported. It may be shorter than the original. In either case, the object to be transferred does not protrude from the front or rear of the transport body, so that the engaging device can be released and the transport bodies can be stored in a desired section of the travel path with the front and rear of the transport body facing each other.

Inside the paint booth, a fixed dust-proof cover surrounds both sides of the transport body below the lower frame of the transport body, except for the upper passage groove, and the width of the passage groove is small, preventing paint from entering the dust-proof cover. Although it is rare, if the passage groove is covered with flexible rubber or the like so that it can be rolled up on one side, the adhesion of paint to the traveling wheels, engagement device, drive chain, carrier coupling body, etc. can be completely prevented. Prevented.

Furthermore, when painting using a robot, the engagement between the vertical axis guide roller and the fixed guide rail prevents the cart from moving laterally, making it possible to transport the object while maintaining its accurate left and right position.

Further, when a stopper provided on the travel path is projected to release the engagement device of the transfer body, the transfer body is stopped, and subsequent transfer bodies are sequentially stopped by the release piece of the preceding stop transfer body and stored. When the stopper is released, the vehicles will start moving one by one starting from the first one.

Embodiment FIGS. 1 to 8 show an embodiment of a transport body in which a carrier coupling body is connected to the front and rear of a truck. The lower frame 2 of the truck 1 is made by welding front and rear horizontal members 3, 3 and vertical members 4, 4 in the running direction.
A swivel wheel 5 that runs on the floor F is attached to each end of the . On the horizontal members 3, 3, there is a lower side 6b of the connecting metal 6, such as a U-shaped or I-shaped cross section, which has a vertical portion 6a with a smaller lateral thickness at an intermediate position offset from the center to one side. are fixed so that the vertical portions 6a are aligned in the front and rear, and the front and rear horizontal members 7, 7 are fixed to the upper sides 6c, respectively, and the vertical members 8, 8 are welded to both ends of the horizontal members 7, 7 to form the upper frame 9. do. The left and right centers of the upper frame 9 and the lower frame 2 coincide, and a connecting hole 11 is provided in a connecting fitting 10 that projects forward and backward from the center of each of the horizontal members 3, 3. Reference numeral 12 denotes a bracket which is provided on the upper surface of the horizontal members 3, 3 and protrudes back and forth from the center thereof to one side.A vertical axis guide roller 13 is rotatably supported on the bracket 12. The guide roller 13 will be described later. Large objects to be transferred are placed at appropriate locations on the upper frame 9.
For example, a receiver 1 suitable for supporting an automobile body M
4th grade is installed.

A pit 15 is provided under the floor along the transfer path of the trolley 1, and pillars 16 are vertically installed at regular intervals on both sides of the pit,
Horizontal member 17 fixed at the bottom and near the floor F
A support plate 19 is fixed to the support plate 19 and the cross beam 18, and an upper carrier rail 21 and a lower chain rail 22, which are formed by a pair of channel materials facing each other, are fixed in a U-shaped groove 20 formed on the support plate 19. Carrier rail 2
The top surface of 1 is flush with the floor surface F.

The carrier rail 21 has four rollers 2 each of carriers 23, 24, 25, and 26 connected to the truck 1.
7 fits loosely and guides the movement. The two front carriers 23 and 24 and the two rear carriers 25 and 26 are connected freely by connecting rods 28 exposed above the floor to form a front carrier connection body 29 and a rear carrier connection body 30. , tow pins 31 vertically installed on the carriers 24 and 25 are fitted into the connecting holes 11 at the front and rear parts of the truck 1, respectively, so that the truck 1 and the front and rear carrier coupling bodies 29 and 30 are connected to each other so as to be able to move freely up and down. A transportation body A is constructed. 32 is rail 21
A vertical axis guide roller located between the opposite edges of the
Prevents carrier from swinging sideways.

As shown in FIGS. 6 and 7, rollers 35 of a trolley 34 that suspends a drive chain 33 of the transfer body A are guided and run on the chain rail 22. As shown in FIGS. The drive chain 33 can be horizontally bent and is stretched parallel to the travel path of the transport body A. A pusher 37 for pulling the leading carrier 23 projects upward from the main body 36 of the trolley 34, and an engaging device 38 for engaging and disengaging the pushing carrier 37 is provided on the leading carrier 23.

The engagement device 38 is connected to the roller 2 of the leading carrier 23.
A lever 42 is pivotally connected to the rear part of a portion 40 of the main body 39 which pivotally supports the main body 39 with a pin 41, and a hook metal fitting 44 is pivotally connected to the lower rear part of the main body 39 with a pin 43. and a link 45 that connects the lever 42 and the hook metal fitting 44. Normally, the lever 42 is in an engaged position where it contacts the protrusion 46 of the portion 40 due to its own weight, and in this position, the front of the hook metal fitting 44 is The hook 47 formed on the pusher 3
7. The front and rear surfaces of the hook 47 are inclined rearward, and the pusher 3
The front protruding slope 48 of No. 7 is securely engaged with the transfer body A.
drive forward. When the pusher 37 moves forward while the transfer body A is stopped, the pusher 37 contacts the rear slope 49 of the hook metal fitting 44, rotates the hook metal fitting 44 upward together with the lever 42, and enters the recess 50. Then, when the hook metal fitting 44 is lowered, it engages with the hook 47.

On the other hand, a release piece 51 that protrudes above the floor surface F is attached to the rear carrier 26, and a tip curved body 53 of the lever 42 of the transport body A that follows the rear slope 52 is attached to the rear carrier 26.
When the transport object A runs aground, the following transport object A is attached to the hook metal fitting 44.
is pulled up, disengages from the pusher 37, and stops. Therefore, a stopper (not shown) is projected from the side into the transfer path, and the lever 42 of the moving body A is tilted upward to move the pusher 3.
7 and are stopped, the subsequent conveying bodies A are successively disengaged from the pusher 37 by the release piece 51 of the preceding stopping conveying body A and stopped one after another. Next, when the stopper is retracted, the hook metal fitting 44 of the leading stop and transfer body A is lowered, and the advancing pusher 37 engages with the hook 47 and moves it forward. As a result of this forward movement, the hook metal fitting 44 of the next-stage stop and transfer body A is lowered, and the vehicle starts moving in the same manner as described above. Therefore, the transport bodies A can be stored in a desired section of the transport path, and the transport bodies A in storage can be automatically started one by one.

In addition, in order to store the transported object M as described above, it is necessary to select the transport object A to be longer than the transported object M.
Since it can be easily separated from the carrier connector, it is convenient to store it separately or to replace it with a carrier connector of an appropriate length.

In the painting booth, the outer ends of opposing cross beams 55 and 56 are fixed to the upper ends of the columns 16 on both sides in the pit, leaving passage grooves 54 in the vertical portions 6a, and the upper surfaces of the columns 16 are at least above the floor. The pit 15 is covered with a dustproof cover 57 in the form of a tunnel.
Also close the upper part of both sides.

The positions of the vertical portion 6a and the passage groove 54 are shifted laterally from the center of the truck 1 so that paint entering through the passage groove 54 does not stain the carrier coupling bodies 29, 30, the drive chain 33, etc. The passage groove 54 may be in an open state as long as the width is kept small, but in order to improve the closure performance of the dustproof cover 57, one side of the flexible elastic sheet 58 is fixed on the dustproof cover 57 to open the passageway. It is preferable to cover the groove 54 and locally roll up the elastic sheet 58 only in the portion through which the vertical portion 6a passes.

With the above structure, the movable parts below the lower frame 2, ie, the swivel wheels 5, the carrier coupling bodies 29, 3,
0. The adhesion of paint to the drive chain 33, trolley roller 35, etc. is completely prevented, and the conventional problems of increased running resistance and poor coating due to paint adhesion are solved.

In the painting booth, wheels 5 are placed on gutter-like rails 5 in order to ensure complete grounding during electrostatic painting of trolley 1.
Pass through water filled with 9.

When using a painting robot in a painting booth, in order to maintain high accuracy in the transfer position and stop position of the trolley 1, and to facilitate the robot's teaching work, it is necessary to temporarily stop the trolley 1 and perform the robot work. Since this is often carried out, it is advisable to provide a separate carriage transfer device 60 in place of the drive chain 33. As shown in FIGS. 4 and 8, the trolley transfer device 60 includes a pair of rails 62 made of channel material fixedly supported within a groove 61 formed in the support plate 19 adjacent to one side of the rail 21; A series of connecting bodies in which a number of carriers 65, in which front and rear rollers 63 are fitted to the rails 62 and guide rollers 64 are fitted between the rails 62, are connected bendably by connecting rods 66, and the connecting bodies are moved back and forth. It has a drive chain 67 connected at both ends thereof, and an engagement rod 68 which is stopped from rotating by a carrier 65 and guided up and down, and supported by a cam roller 69 which is rotatably supported on one side of the lower part of the engagement rod 68. The engaging rod 68 is kept in the raised position in contact with the cam plate 70 fixed to the plate 19. In this state, the forked engagement portion 71 at the upper end of the engaging rod 68 engages with the horizontal member 3 of the lower frame 2 of the truck, thereby moving the truck 1 forward in a tact. Therefore, the trolley 1 is transported with high traveling position accuracy. After the transfer is completed, a part of the cam plate 70 is lowered by a cylinder or the like, and the cam roller 69 retreats with the lower position 69a of the remaining cam plate 70. At the backward limit position, the cam roller 69 moves the part of the cam plate 70 down. It rides on the descending section and moves forward again on the cam plate 70 when the descending section next rises.

The engaging rod 68 is offset to one side from the longitudinal center line of the truck 1, and its pushing force gives a turning moment to the truck 1. Therefore, the vertical shaft guide roller 13 that is pivotally supported by the horizontal member 3 is inserted into the downward opening of the guide rail 72 made of a channel member fixed to the lower side of the horizontal member 55 to cancel the turning moment. To effectively prevent rocking. Further, since the guide roller 13 is covered by the guide rail 72, paint does not adhere to the inner surface of the guide rail or the roller 13.

FIGS. 9 to 11 show an embodiment of a truck, that is, a transport object Aa, in which the truck is longer than the object to be transported M and the carrier coupling bodies 29, 30 are omitted. In the figure, the same structural parts as in the previous embodiment are designated by the same reference numerals.
In this embodiment, a pusher plate 73 is provided protruding from the lower part of the front end of the lower frame 2, a hook fitting 76 is pivotally attached to the attachment 74 of the drive chain 33a with a pin 75, and is biased by a weight 77. Then, the hook 78 is held in a position where it engages with the pusher plate 73. The front part of the hook fitting 76 becomes a slope 79, and a release piece 81 having the same height as the slope 79 is fixed to the rear end of the lower frame 2.

When the hook 78 is engaged with the pusher plate 73 of the truck Aa and the pusher plate 73 is being pushed, a stopper (not shown) protrudes and hits the slope 79, the hook metal fitting 76 is rotated downward, and the hook 78 and the pusher plate 73 are engaged with each other. comes off and trolley Aa stops. When the following truck Aa approaches this and its hook slope 79 hits the release piece 80 of the preceding stopping truck, the following truck stops in the same way. In this way, the trolley Aa can be stored.

When the preceding cart Aa in storage starts, the hook metal fitting 76 of the next cart stands up, so that it automatically engages with the hook 78 that arrives next and starts moving. In this way, the trolleys Aa start moving one by one.

In order to push the trolley Aa, a pusher 73 is provided protruding from the lower part of the lower frame 2, and is driven by a normal dual trolley conveyor chain.In the painting booth, when a painting robot is used, a drive chain 33a is used. In order to eliminate the influence of deterioration in accuracy of the transfer position of the trolley 1 due to elongation of the carriage, etc., another carrier rail 82 and a support rail 83 for the carrier drive chain are provided offset to one side from the center of the running path. The pusher 80 is pushed by the dog 84. In this embodiment as well, guide rollers 13 and their guide rails 72 are provided to accurately maintain the left and right position of the truck.

Effects of the invention The present invention is as described above, and in addition to being able to run the cart in a stable posture using the running wheels, the upper frame on which the transported objects are loaded and the lower frame with the wheels are vertical parts with a small width in the lateral direction. Since the lower frame and its traveling drive section are all closed with a dust cover in the paint booth, except for the passage groove of the forward vertical section, paint will not adhere to the wheels and other moving parts. Furthermore, when using a painting robot, it is also possible to provide a separate drive device to improve the accuracy of the moving position of the trolley. The guide roller and the guide rail covering the guide roller from above have the effect of accurately holding the lateral position of the conveying body and easily performing high-quality coating.

[Brief explanation of the drawing]

Figures 1 to 8 show an embodiment of the present invention,
Figures 1, 2, and 3 are respectively a plan view, an elevation view, and a side view of the cart; Figure 4 is a cross-sectional view of the entire conveyor; Figure 5 is an elevational view of the transport body; Figure 6. is an elevational view of the engagement device, and FIG. 7 is an elevational view of the engagement and disengagement.
Figure 8 is a partial enlarged elevational view of the direct drive device for the trolley;
9 to 11 show other embodiments, and FIG.
10 is a schematic side view of the interior of the painting booth, and FIG. 11 is an elevational view of the engagement device. DESCRIPTION OF SYMBOLS 1... Truck, 2... Lower frame, 5... Running wheel, 6... Connecting metal fittings, 6a... Vertical part, 9...
...Upper frame, 13...Vertical axis guide roller,
33, 33a... Drive chain, 38... Engagement device, 51, 81... Release piece, 54... Passage groove, 5
7...Fixed dustproof cover, 72...Fixed guide rail, A, Aa...Transfer object, M...Transfer object.

Claims (1)

[Scope of utility model registration request] A transporting body having a lower frame equipped with running wheels and an upper frame carrying objects to be transported arranged in a line in the traveling direction and fixed to each other by a coupling fitting having a vertical portion with a small width, and a lower part of the transporting body. A removable engagement device provided at the front of the transfer body with respect to the drive chain in the running direction provided at the front of the transfer body, and an engagement device provided at the rear of the transfer body and disengaged from the engagement device of the subsequent transfer body when the subsequent transfer body approaches. a release piece, a fixed dustproof cover having a passage groove for the vertical portion on the upper part and extending in the running direction and surrounding the upper surface of the lower frame and both sides of the transport body below the lower frame; and a vertical shaft guide roller provided on the lower frame. , a dust-proof floor conveyor having a fixed guide rail in the running direction with a downward opening in which a vertical axis guide roller is fitted in a fixed dust-proof cover.